1. An apparatus (101) with jig assembly (100) for testing and determining a radial compressive strength of tubular element comprises a hydraulic press system (13), a pinion gear (1), a stationary jaw carrier (2), a plurality of jaws (3) and a rack gear (4); the stationary jaw carrier (2) comprising a flange (7) having borehole in center and surrounding the borehole is followed by supportive circular disc (8) in circular shape; Said supportive circular disc (8) having plurality of slots (9) preferably at 120º angle interval; the pinion gear (1) having a circular borehole at the center and a plurality of involutes curved region (6) is formed preferably by less than 60º angle of interval in the periphery of the borehole (5); the circular borehole of the pinion gear (1) is in same plane with the supportive circular disc (8) of the stationary plate (7); the teeth of the pinion gear (1) are engaged with the slots of the rack gear (4); the plurality of jaws (3) having a jaw trunk (10) and jaw shoe (11); said jaws (3) are configured with the slots (9) of the supportive circular disc (8) of the stationary jaw carrier (2) such that the shoe (11) is positioned in borehole (5) of pinion gear (1) and the trunk (10) portion is adjoin with the curved surface of involutes curved region (6) in same plane; Said jaws (3) are pushable and retractable towards the borehole by the rotation of the pinion gear (1) through the up-down movement of the rack gear (4);

2. The apparatus as claimed in claim 1, wherein the rack gear (4) is configured with the hydraulic cylinder (14) of the hydraulic system for up-down movement of the rack.

3. The apparatus as claimed in claim 2, wherein the hydraulic system is configured with the pressure gauge (15) to measure the pressure over the rack gear (4).

4. The apparatus as claimed in claim 1, wherein thickness of the supportive circular disc (8) is equal to the thickness of the jaws (3).

5. The apparatus as claimed in claim 1, wherein the diameter of the borehole of the stationary jaw carrier (2) is greater than to the size and diameter of the tubular/cylindrical elements which is to be tested.

6. The apparatus as claimed in claim 1, wherein the pressure generated by the hydraulic press system (13) calibrated in the load.

7. The apparatus as claimed in claim 1, wherein load cell (16) is configured to measure load applied on all type of tubes/pipes including yarn carrier/cops/bobbin/tubular elements. Dated this January 17, 2024.

Description:FORM 2
THE PATENT ACT 1970
(39 of 1970)
&
The Patents Rules, 2003
COMPLETE SPECIFICATION
(See section 10 and rule 13)

1. TITLE OF THE INVENTION: “An Apparatus with jig assembly for testing and determining radial compressive strength of tubular element”
2. APPLICANT:
(A) Siddhi Engineers
(B) Indian
(C) “SIDDHI HOUSE”
6, Virkunj Society,
Near Vidyanagar School,
Usmanpura, Ahmedabad
Gujarat-380014

3. PREAMBLE TO THE DESCRIPTION
þ COMPLETE

The following specification particularly describes the invention and the manner in which it is to be performed.

Field of Invention:

The present invention relates to testing apparatus for all type of tubes/pipe (metallic and non metallic) cop tubes, bobbins, or yarn carrier used for winding yarn and more particularly, an apparatus with jig assembly for testing and determining a radial compressive strength of the bobbin/cops/yarn carrier/tubular element.
Background of Invention:
Textile industry has important role in the economy. The textile and apparel industry is highly diversified with a wide range of segments ranging from products of traditional handloom, handicrafts, wool, and silk products to the organized textile industry. The yarn production, and load distribution are the primary concerns of the textile industry. For the yarn, the raw material may be natural or synthetic. Natural fibers and filaments come directly from plants, insects, or animals. For example, natural fibers frequently come from cotton plants, silkworms, sheep, goats, and rabbits. There is no human involvement in the creation of natural fibers. Synthetic fibers are man-made i.e. created using machines or handmade. Materials such as acrylic, spandex, nylon, polyester, etc are synthetic and created using extruding process. Fiber strands are grouped or twisted and produce the yarn which must be wound on appropriate yarn carrier.
In the Textile industry, many yarn carrier/Cops are used in a single machine for process of winding. Winding process which involves winding of more than 144 tubes at a time with same number of electric motors makes the process very high energy consuming. The yarn carrier/cores/cops/bobbin is generally used in the textile industry to wind up Yarn. Said yarn carrier/cores/cops/bobbin is made from the steel or aluminium as a raw material and is widely used in textile and other industries as cores for winding of yarns. The yarn winding speeds have increased dramatically in recent years. Currently available textile winders are capable of operating at winding speeds of up to 14000rpm.
High winding speeds result in the application of significant forces to the yarn carrier/cores/cops/bobbin. The forces exerted on the textile cores particularly during start up of a high speed winding operation thus include compressive forces such as are exerted by contact between the drive land and the face of the textile core; shear and abrasive forces such as are exerted by the driven winding drum during initial acceleration of the textile core surface; tensile forces resulting from circumferential acceleration from rest to start-up speed; radially oriented stresses resulting from the centrifugal force generated by the high rotational speed of the textile core; and circumferential stresses caused by tube rotation. If the tube does not have enough strength, due to high speed of rotation, high shrinkage pressure of yarn and said forces, the yarn carrier/cores/cops/bobbin becomes deformed and leading to loss of yarn and also blocking of other spindles leading to productivity issues.
To prevent deformation from the said forces, the radial compressive strength should be appropriate whereby yarn carrier/cops/bobbin sustain radial compressive forces. To test the sustainability of yarn carrier/cops/bobbin over the said radial compressive forces, the crush test/ radial compressive strength test is required to carry out through the testing apparatus.
US 3,164,010 disclose paper core crush or compression tester and method. It relates to a testing machine for determination of crush or compression resistance of paper cores, such as used for winding rolls of plastic film. A device for testing the compressive resistance of cylindrical elements comprising in combination, a frame, a pair of gripping supported in spaced relation upon said frame, a strap affixed at each end to one of said gripping, said strap being arranged to provide a loop which decreases in internal dimension as the ends of the strap are moved apart, a tension gage supported upon the frame and arranged for connection with the first of said gripping, a power transmission mechanism supported upon the frame and arranged for connection with the second of said gripping to provide movement of the second gripping relative to said first gripping, and a compressible sleeve positionable in the loop of said strap, said sleeve having an internal diameter substantially equal to the external diameter of a cylindrical element to be tested in the device.
The limitation of the above prior art is that it can be used for the paper cores only. It can’t test crush test/ radial compressive strength test on the metal yarn carrier/cops/bobbin. Further, said prior art have a metal band/strap which tensioned during the testing of paper tube. Due to the multiple testing through the said band/strap and due to tension of said band/strap, have possibility of damage of strap/band at any time of interval during the testing procedure. Further, due to the tensioning of the band, an elongation of the strap/band occurred which may fail to test the different sizes of the core/cop/bobbin. In addition to, it may produce unequal radial force over the circumferential surface of the core and also friction loss occurred between the core and strap/band. Due to unequal radial force and friction loss, the precision and accuracy of said testing device becomes low.
Hence, it is desperately needed to invent an apparatus for testing a radial compressive strength of the bobbin/cops/yarn carrier which have high accuracy and precision, low maintenance and overcomes the difficulties as described above.
Objective of Invention:
The main objective of the present invention is to provide an apparatus with jig assembly for testing of all type of tubes/pipes including yarn carrier/bobbin/tubular elements.
Another objective of the present invention is to present invention is to provide an apparatus with different type and size of jig assembly for testing of all type of tubes/pipes including yarn carrier/bobbin/tubular elements.
Another objective of the present invention is to provide an apparatus with jig assembly for testing and determining a radial compressive strength/crushing strength of all type of tubes/pipes including yarn carrier/bobbin/tubular elements.
Yet another objective of the present invention is to provide an apparatus with jig assembly to provide the equal radial compressive strength/crushing load to deform the all type of tubes/pipes including yarn carrier/bobbin/tubular elements.
Another objective of the present invention is to provide an apparatus with jig assembly for testing different size of all type of tubes/pipes including yarn carrier/bobbin/tubular elements.
Yet another objective of the present invention is to provide an apparatus with jig assembly for testing of all type of tubes/pipes including yarn carrier/bobbin/tubular elements which is easy to use, of low cost and give accurate, precise and reliable result.
Another objective of the present invention is to provide an apparatus with jig assembly designed with the involutes curve, rack & pinion gears and jaws arrangement according to the present invention.
Yet another objective of the present invention is to provide an apparatus with jig assembly without any frictional loss according to the present invention.
Yet another objective of the present invention is to provide equal radial force on all type of tubes/pipes including yarn carrier/bobbin/tubular elements.
Summary of Invention:
The present invention relates to an apparatus with jig for testing and determining radial compressive strength of tubular element comprises a pinion gear, a stationary jaw carrier, plurality of jaws and a rack gear. The stationary jaw carrier comprising a flange having borehole in center and supporting circular disc with the jaw slots. Said portion is arranged in the involutes borehole of the pinion gear. The teeth of the pinion gear are engaged with the slots of the rack gear. The plurality of jaws is configured with the slots of the supporting circular disc of the stationary jaw carrier and involutes curve region with bore hole of the pinion gear. The jaws press and retract towards the center of borehole by the rotation of the pinion gear through the up-down movement of the rack gear. The apparatus with jig assembly arranged with the load cell to directly measure the load over all type of tubes/pipes including yarn carrier/bobbin/tubular elements. The apparatus with jig assembly provides simple, fast, easy to use and measure precise compressive strength for different type of tubes/pipes including yarn carrier/bobbin/tubular elements. Primarily, the apparatus with the jig assembly will validate the composition or process parameters of manufacturing the different type of tubes/pipes including yarn carrier/bobbin/tubular elements.
Brief description of drawings:
Other objectives, advantages and novel features of the invention will become apparent from the following detailed description of the present embodiment when taken in conjunction with the accompanying drawings.
Figure 1 shows a schematic diagram of apparatus with jig assembly for testing and determining a radial compressive strength/crushing strength of all type of tubes/pipes including yarn carrier/bobbin/tubular elements.
Figure 2 shows a schematic diagram of a jig assembly for testing and determining a radial compressive strength/crushing strength of all type of tubes/pipes including yarn carrier/bobbin/tubular elements.
Figure 3 shows a perspective view of a pinion gear with involute curve of an apparatus with jig assembly for testing and determining a radial compressive strength/crushing strength of all type of tubes/pipes including yarn carrier/bobbin/tubular elements.
Figure 4 shows a front view of a pinion gear with involute curve according to the present invention.
Figure 5 shows a perspective view of a stationary jaw holder of an apparatus with jig assembly for testing and determining a radial compressive strength/crushing strength of all type of tubes/pipes including yarn carrier/bobbin/tubular elements.
Figure 6 shows a perspective view of a Jaw of an apparatus with jig assembly for testing and determining a radial compressive strength/crushing strength of all type of tubes/pipes including yarn carrier/bobbin/tubular elements.
Figure 7 shows a perspective view of a rack of an apparatus with jig assembly for testing and determining a radial compressive strength/crushing strength of all type of tubes/pipes including yarn carrier/bobbin/tubular elements.
Figure 8 shows a schematic diagram of apparatus with jig assembly with hydraulic system and load cell according to the present invention.
Figure 9 shows an open position of Jaws according to the present invention.
Figure 10 shows a close position of Jaws according to the present invention.
Figure 11(a) shows a jig assembly for testing and determining a radial compressive strength/crushing strength of 25 mm - 50 mm outer diameter of all type of tubes/pipes including yarn carrier/bobbin/tubular elements.
Figure 11(b) shows a jig assembly for testing and determining a radial compressive strength/crushing strength of 51 mm - 75 mm outer diameter of all type of tubes/pipes including yarn carrier/bobbin/tubular elements.
Figure 11(c) shows a jig assembly for testing and determining a radial compressive strength/crushing strength of 76 mm - 125 mm outer diameter of all type of tubes/pipes including yarn carrier/bobbin/tubular elements.
Detailed description of invention:
Before explaining the present invention in detail, it is to be understood that the invention is not limited in its application to the details of the construction and arrangement of parts illustrated in the accompany drawings. The invention is capable of other embodiment, as depicted in different figures as described above and of being practiced or carried out in a variety of ways. It is to be understood that the phraseology and terminology employed herein is for the purpose of description and not of limitation.
Before discussing specific embodiments, it is to be noted that the present invention is for the measuring system and used for inspection, quality checking and shorting purpose in the engineering unit dealing with metal and non-metal tubular components.
The invention discloses an apparatus with jig assembly for testing and determining a radial compressive strength/crushing strength of all type of tubes/pipes including yarn carrier/bobbin/tubular elements.
Referring Fig. 1 of the present invention shows a schematic diagram of apparatus (101) with jig assembly (100) according to the present invention. The apparatus (101) comprises a hydraulic press system (13) having a hydraulic cylinder (14) to generate the pressure through the hydraulic power pack (17), a pressure gauge (15) to measure the pressure generated by the hydraulic cylinder (14), a support carrier (12) is to provide skeletal support to different types of the jig assembly (100).
Referring the Fig. 1 & 2 of the present invention shows a schematic diagram and perspective view of an apparatus (101) with jig assembly (100) for testing and determining a radial compressive strength/crushing load of all type of tubes/pipes including yarn carrier/bobbin/tubular elements. In said apparatus (101), different types, size, thickness and material of the assembly (100) can be configured to measure the radial compressive strength/crushing strength of different types, size, thickness and material of all type of tubes/pipes including yarn carrier/bobbin/tubular elements. The jig assembly (100) according to the present invention mainly comprises a pinion gear (1), a stationary jaw carrier (2), a plurality of Jaws (3) and a rack (4) and configured to the hydraulic press system (13) and forms an apparatus (101) for testing radial compressive stress for particularly tubular elements.
Referring Fig. 3 shows perspective views of the pinion gear (1) of the present invention. A pinion gear (1) has an appropriate number of teeth surrounded on the periphery of the gear. The pinion gear (1) having a configuration of borehole (5) (as shown in Fig 4) at the center in which at the less than 60º angle (?) of interval, a involutes curved region (6) (as shown in gray colored region in Fig. 4) is formed in the inner circumferential surface of the borehole (5) as shown in Fig. 3 and 4. The involutes curve region (6) having two points i.e. resting point (R) and maximum pressing point (P). The involutes curve region (6) can be defined as a region where the steep resting point is gradually increments towards the pressing point at which the maximum pressure is to be produced. Said involutes curved region (6) with angle (?) has denoted for the jaw (3) accommodate in the pinion gear (1). In the preferred embodiment, three jaws (3) have provided in the involutes curve region (6) and number of the involutes curve region (6) is not limited thereto. The angle of intervals of involutes curve region (6) is varies according to the diameter and size of the tubular elements on which radial compressive strength test is to be carried out.
Referring Fig. 5 shows a perspective view of the stationary jaw holder (2) of the present invention. The stationary jaw holder (2) having flat surfaced flange (7) in circular shape and is in close conjugation with the flat surface of the pinion (1). The center of stationary jaw carrier (2) has circular borehole and said borehole correlate with the jaw (3) dimension. The diameter of the borehole of the stationary jaw carrier (2) is greater than to the size and diameter of the tubular/cylindrical elements which is to be tested.
On the upper surface of flange (7) of stationary jaw carrier (2), the supportive circular disc (8) is projected surrounding on the circular borehole of the stationary jaw carrier (2). Said supportive circular disc (8) having three slots (9) at 120º angle interval which accommodates the jaws (3) as shown in Fig.2. Said number of jaw slots (9) of the supportive circular disc (8) are varies according to the size and dimension of the tubular elements on which radial compressive strength test is to be carried out. The thickness of the supportive circular disc (8) is similar to the thickness of the pinion gear (1).
Referring Fig. 6 shows a perspective view of the jaw (3). The jaw having two main portions i.e. jaw trunk (10) and jaw shoe (11). The apex of the jaw trunk (10) having circumferential surface and the jaw shoe (11) is formed at the base of the jaw trunk (10). Said jaw shoe (11) formed in the arc shape and made in both side of the jaw trunk (10) in symmetrical manner. The dimensions of the jaw shoe (11) are selected based on the size and diameter of the tubular elements on which radial compressive strength test is to be carried out. The thickness and width of the jaw trunk (10) is similar to thickness of the supportive circular disc (8) and width of the slots (9) respectively of the supportive circular disc (8) of stationary jaw carrier (2). Further, the number of the jaws (3) and dimension of the jaws (3) is according to the size and diameter of the tubular elements on which radial compressive strength test is to be carried out.
Fig. 7 shows the perspective view of the rack gear. The rack gear having teeth on one of the side surface and size of said teeth is formed such that it engaged with the teeth of said pinion gear (1) and rotates the pinion gear (1) on the tooth surface of the rack gear (4).
Referring Fig. 1 to Fig. 6, the stationary jaw carrier (2) is accommodate with the pinion gear (1) such that the supportive circular disc (8) of the stationary jaw carrier (2) is in same plane with the bore hole (5) of the pinion gear (1). The upper surface supportive circular disc (8) is in same plane with the upper surface of the pinion gear (1) and the side surface of the slots (9) is in same plane with the resting point surface of the involutes curve region (6) of the pinion gear (1) as shown in Fig. 2.
The jaws (3) are assembled with the slots (9) of the supportive circular disc (8) of the stationary jaw carrier (2) in such way that the apex of the jaw trunk potion (10) is rested at maximum retractable position and adjoin with the curve surface of the involutes curved region (6) of the pinion gear (1) and the jaw shoe (11) is adjoin with the inner circumferential surface of the supportive circular disc (8) of the stationary jaw carrier (2).
Said whole arrangement of the pinion gear (1), a stationary jaw carrier (2), a plurality of Jaws (3) with a rack (4) forms jig assembly (100) as shown in Fig. 1.
The support carrier (12) provides the skeletal support to the assembly (100) through mounting flange (7) of the stationary jaw carrier (2) over the support member (17).
The hydraulic cylinder (14) of the hydraulic press system (13) is connected with the rack gear (4) and the teeth of the rack gear (4) are engaged with the teeth of the pinion gear (1) of the assembly (100). The rack gear (4) is moved by the hydraulic cylinder (14). The pressure gauge (15) configured with the hydraulic press system (13) which shows the reading of the pressure generated for moving the rack gear (4). Such pressure gauge (15) is calibrated to the load through which the radial compressive load/crushing load of all type of tubes/pipes including yarn carrier/bobbin/tubular elements can be measured.
Alternatively, the load cell (16) can be configured with the present invention to measure the load on the all type of tubes/pipes including yarn carrier/bobbin/tubular elements. The load cell (16) is configured between the hydraulic cylinder (14) and the rack gear (4) as shown in Fig. 8. According to the pressure generated by the hydraulic cylinder (14) for movement of the rack gear (4), the load cell generates the electrical signal which transfers to the measuring system and determine the load on the tabular elements.
It is to be noted that in the present description, the present invention can be configured with the hydraulic press system (13), servo motor system, pneumatic system, mechanical press break system and it is not limited thereto. The present invention can be configured with the different devices which can be able to generate the pressure over the rack gear (4) or up-down movement of the rack gear (4) and able to measure the magnitude which can be calibrated to the load on the tubular element.
Referring Fig. 9 and Fig. 10, shows the movement of jaws (3) to press and retract movement with respect to the center of borehole of the stationary jaw carrier (2). As the hydraulic cylinder (14) of the hydraulic pressure system (13) moves towards the downward direction, the rack gear (4) also moves in the downward direction. Due to the teeth engagement of the rack gear (4) and the pinion gear (1), the pinion gear (1) start to rotate. The all three jaws (3) move in longitudinal direction towards the center of the hole of the stationary jaw carrier (2) as the contact surface between the jaws (3) and the surface of the involutes curved region (6) of involutes shape hole (5) of the pinion gear (1) is decreased.
In similar manner, as the hydraulic cylinder (14) of the hydraulic press system (13) moves towards the upward direction, the rack gear (4) also moves in the upward direction. Due to the teeth engagement of the rack gear (4) and the pinion gear (1), the pinion gear (1) cause to rotate in opposite direction as rotate while the rack moves in downward direction. The all three jaws (3) move in longitudinally outward direction of the center of hole of the stationary jaw carrier (2) as the contact surface between the jaw and the surface of the involutes curved region (6) of involutes shape hole (5) of the pinion gear (1) is increased.
Based on the movement of the pinion gear (1) on the rack gear (4), the jaws (3) are moves inwards or outwards of the center of hole of stationary jaw carrier (2) and due to the movement of the jaws (3), the radial compressive load is generated over the tubular element situated in the hole of the stationary jaw carrier (2).
The present invention of the testing and determining the radial compressive strength according to the present invention having different types of the dimensions and having different number of the similar embodiments and it does not limited thereto.
After assembly of the embodiments of the present invention, the radial compressive strength testing process for all type of tubes/pipes including yarn carrier/bobbin/tubular elements according to the present invention comprises the following steps:
i. The jaws (3) are set in the resting point position and retractable with respect to the center of the borehole of the stationary jaw carrier (2) by moving the rack gear (4) in upward direction through the hydraulic system.
ii. The all type of tubes/pipes including yarn-carrier/bobbin/tubular element is inserted in the borehole of the jig assembly (100);
iii. The rack gear (4) is moved slowly in downward direction till the all type of tubes/pipes including yarn-carrier/bobbin/tubular element gets stuck between the jaws (3).
iv. The rack gear (4) moved in downward direction till the all type of tubes/pipes including yarn-carrier/bobbin/tubular element becomes crushed/deform between the jaws (3).
v. The pressure generated by the hydraulic press system (13) is noted down using the pressure gauge (15) while performing the step (iv).
vi. The load is calculated by using the pressure generated by the hydraulic system.
The apparatus with jig for testing and determining a radial compressive load of the all type of tubes/pipes including bobbin/cops/yarn carrier makes the easy, comfortable and faster operation of shorting and checking.
The present invention is illustrated more in details in the following experimental examples. The example describes and demonstrates the embodiments within the scope of the present invention. This example is given solely for the purpose of illustration and is not to be construed as limitations of the present invention, as many variations thereof are possible without departing from spirit and scope.
Experiment 1:
In this experiment, the crushing load was calculated for the different types of grade of the steel/aluminium pipe with different types of the dimension. The pipe was stuck between the jaws (3) by moving the rack gear (4) in the downward direction through the hydraulic cylinder (14) according to the present invention. The pressure was slowly increased between the jaws (3) and steel/aluminium pipe was crushed due to the pressure. The pressure was noted down while the pipe was crushed. Total seven types of the pipes were tested, and the results of each testing were recorded in Table 1.
Table. 1
Sr. No Pipe Size Grade Crushing Load (Kg)
1 44.45 X 1.0 MM Normal MC11 CDW 2885
2 44.45 X 1.0 MM SHS MC11 CDW 6731
3 44.45 X 1.22 MM Normal MC11 CDW 3606
4 50 X 1.2 MM Normal ST52 CDW 2404
5 50 X 1.0 MM Normal ST52 CDW 1683
6 45 X 1.5 MM Normal ST52 CDW 5049
7 44.45 X 0.8 MM SHS ST-52 ERW Full Hard 1683

Experiment 2:
In the experimental setup, three distinct jig assemblies were utilized, each tailored to accommodate tubular elements of varying diameters. As depicted in Fig. 11a, the first jig assembly was designed specifically for testing tubular elements with diameters ranging from 25 to 50 mm. This assembly provided the radial compressive strength of the tubular elements.
Moving on to Fig. 11b, the second jig assembly was showcased. This assembly was similar in design to the first, but was adapted to handle tubular elements with diameters between 51 and 75 mm. The modifications in the assembly allowed for a broader range of tubular elements to be tested, thereby increasing the versatility of the experimental setup.
Lastly, Fig. 11c illustrated the third jig assembly. This assembly was the largest of the three, designed to accommodate tubular elements with diameters spanning from 76 to 125 mm. Despite its larger size, the assembly maintained the same level of precision and reliability as its counterparts.
Each of these jig assemblies played a crucial role in the experimental process, allowing for a comprehensive analysis of tubular elements across a wide range of diameters. The innovative design of these assemblies, as per the present invention, ensured a high degree of accuracy and consistency in the testing results.
In conclusion, the innovative design of these jig assemblies, as per the present invention, allowed for a comprehensive and precise analysis of tubular elements across a wide range of diameters. The meticulous engineering behind these assemblies ensured a high degree of accuracy and consistency in the testing results, paving the way for further advancements in the field.
The invention has been explained in relation to specific embodiment. It is inferred that the foregoing description is only illustrative of the present invention and it is not intended that the invention be limited or restrictive thereto. Many other specific embodiments of the present invention will be apparent to one skilled in the art from the foregoing disclosure. All substitution, alterations and modification of the present invention which come within the scope of the following claims are to which the present invention is readily susceptible without departing from the spirit of the invention. The scope of the invention should therefore be determined not with reference to the above description but should be determined with reference to appended claims along with full scope of equivalents to which such claims are entitled.
Reference numerals

100. Jig Assembly
101. Apparatus with Jig Assembly
1. Pinion gear
2. Stationary jaw holder
3. Jaws
4. Rack gear
5. Involutes Shape hole
6. Involutes curved region
7. Flat surfaced flange
8. Supportive circular disc
9. Slots
10. Jaw trunk
11. Jaw shoe
12. Support Carrier
13. Hydraulic press System
14. Hydraulic cylinder
15. Pressure gauge
16. Load Cell
17. Support Member
18. Hydraulic Tank
R. Resting Point
P. Maximum Pressing point
, Claims:We Claim:

1. An apparatus (101) with jig assembly (100) for testing and determining a radial compressive strength of tubular element comprises a hydraulic press system (13), a pinion gear (1), a stationary jaw carrier (2), a plurality of jaws (3) and a rack gear (4);
the stationary jaw carrier (2) comprising a flange (7) having borehole in center and surrounding the borehole is followed by supportive circular disc (8) in circular shape; Said supportive circular disc (8) having plurality of slots (9) preferably at 120º angle interval;
the pinion gear (1) having a circular borehole at the center and a plurality of involutes curved region (6) is formed preferably by less than 60º angle of interval in the periphery of the borehole (5); the circular borehole of the pinion gear (1) is in same plane with the supportive circular disc (8) of the stationary plate (7); the teeth of the pinion gear (1) are engaged with the slots of the rack gear (4);
the plurality of jaws (3) having a jaw trunk (10) and jaw shoe (11); said jaws (3) are configured with the slots (9) of the supportive circular disc (8) of the stationary jaw carrier (2) such that the shoe (11) is positioned in borehole (5) of pinion gear (1) and the trunk (10) portion is adjoin with the curved surface of involutes curved region (6) in same plane; Said jaws (3) are pushable and retractable towards the borehole by the rotation of the pinion gear (1) through the up-down movement of the rack gear (4);
2. The apparatus as claimed in claim 1, wherein the rack gear (4) is configured with the hydraulic cylinder (14) of the hydraulic system for up-down movement of the rack.
3. The apparatus as claimed in claim 2, wherein the hydraulic system is configured with the pressure gauge (15) to measure the pressure over the rack gear (4).
4. The apparatus as claimed in claim 1, wherein thickness of the supportive circular disc (8) is equal to the thickness of the jaws (3).
5. The apparatus as claimed in claim 1, wherein the diameter of the borehole of the stationary jaw carrier (2) is greater than to the size and diameter of the tubular/cylindrical elements which is to be tested.
6. The apparatus as claimed in claim 1, wherein the pressure generated by the hydraulic press system (13) calibrated in the load.
7. The apparatus as claimed in claim 1, wherein load cell (16) is configured to measure load applied on all type of tubes/pipes including yarn carrier/cops/bobbin/tubular elements.
Dated this January 17, 2024.