FIELD OF INVENTION
[001] The present invention relates to the field of watch hands. More particularly, the present invention relates to provide a semi-automatic machine for diamond multi faceting of watch hands.
BACKGROUND OF THE INVENTION
[002] Once the watch hand is cut out from the metal it is then diamond-cut. The finishing of the hands is where the work really begins as there are countless ways to decorate a hand. It can be facetted (two or three facets), curved, flat, highly polished, matt, coloured and more. Many of the processes are carried out by diamond cutting machines, but there are also ancient machines that can create finishes that can't be achieved as well with CNC machines.
[003] Publication No. NZ576516 relates to a brilliant gemstone cut, having a crown, a girdle and a pavilion. The crown has a flat table shaped as an equilateral n-sided polygon. The girdle is also multi sided polygon. The corner, lower girdle, bezel and star facets are at significantly angles of inclination, with respect to the table to provide significantly improved brilliance. The upper corner facets are spaced from the girdle. The space between the corner facet vertices and the girdle is left open to be covered by a prong of a jewelry setting.
[004] Publication No. US20030161376 discloses average power output of a laser is scaled, to first order, by increasing the transverse dimension of the gain medium while increasing the thickness of an index matched light guide proportionately. Strategic facets cut at the edges of the laminated gain medium provide a method by which the pump light introduced through edges of the composite structure is trapped and passes through the gain medium repeatedly. Spontaneous emission escapes the laser volume via these facets. A multi-faceted disk geometry with grooves cut into the thickness of the gain medium is optimized to passively reject spontaneous emission generated within the laser material, which would otherwise be trapped and amplified within the high index composite disk. Such geometry

allows the useful size of the laser aperture to be increased, enabling the average laser output power to be scaled.
[005] Publication No. US20050050921 relates to a multi-chip, aluminium titanium nitride coated, metal cutting band saw blade for cutting a metal work piece comprises a number of cutting teeth 12 that define the cutting direction a of the band saw blade, with the cutting direction transverse to the feed direction of the band saw blade. The teeth 12 are arranged in a repeating pattern of groups of successive teeth 12, where each group includes a lead tooth with a number of trailing teeth. Each tooth 12 comprises a laterally extending cutting surface 30 that extends for a height from the central plane of the band saw blade and faces the cutting direction of the band saw blade, and primary and secondary clearance surfaces 32, 34 that define an acute angle to the upper surface 18 of the band saw, where the acute angle defined by the secondary clearance surface 34 is greater than the acute angle defined by the primary clearance surface 32.
[006] Publication No. CN108081113 relates to an engine cylinder hole honing machine concentricity calibration assembly and a vertical honing machine. The calibration assembly comprises a calibration rod, a calibration bar, a calibration instrument and a calibration plate. The calibration bar is installed at the lower end of the calibration rod. The calibration instrument is connected with the calibration bar through a connecting rod. A watch hand is arranged at the front end of the calibration instrument. The calibration plate is provided with multiple datum holes. The engine cylinder hole honing machine concentricity calibration assembly is simple in structure, convenient to operate, capable of ensuring that a cylinder hole and a honing shaft has high concentricity, and capable of effectively avoiding the problem that due to the poor concentricity between the honing shaft and the cylinder hole, the cylinder hole generates tool marks and hot spots.
[007] Publication No. JPS647I630 relates to a thin hand of uniform quality by forming a petticoat hole by press work in a metal belt material, press punching an

external shape to be trimmed back in a part containing the petticoat hole, thereafter performing flat braiding, finishing a surface, forming a coating layer thereafter removing the belt material. Continuously press punching a belt material of copper or brass forming a petticoat hole, pilot hole and escape holes the belt material, containing the petticoat hole, is press punched performing return trimming of external shape of a pointer. "Next the belt material, containing the hand, is flat braided by press punching, and the belt material forms its obverse part and reverse part to be in the same level to an obverse part and a reverse part of the hand. Next applying surface finishing of diamond cut, honing, etc., to a surface part of the belt material, a coating finished layer by plating, painting, etc., is formed.
[008] Publication No. JP2625527 relates to a hand and to enhance yield and appearance quality by applying plating to the hand before press processing. At first, a brass strip material of a copper alloy is continuously punched to form pilot holes and petticoat holes. Next, plating of Cu, Au or Ag is applied to the strip material containing the petticoat holes as soft plating of Hv 250 or less in order to lower the engaging pressure with a hand shaft and to extend the diamond bits life of a post-process. Subsequently, the outer shape profile of a hand is punched between the pilot holes and immediately pushed back to the punched hole.
[009] Publication No. CN107443168 relates to a cutter setting device for a machine tool cutter. According to the cutter setting device for the machine tool cutter, a device base is of a structure made of magnetic materials, a hole is formed in the device base, a measuring rod of a dial indicator is of a structure which can run through the hole, a fastening screw on the device base is of a structure which can extend into the hole, when the device base is attracted to a machine tool body, a measuring head of the dial indicator is of a structure which can abut against a cutter body.

[010] Publication No. JPS5766801 relates to a product of high accuracy and quality, by rectilinearly cutting at the optimal speed with a diamond tool a thin sheet required of high surface quality as for a timepiece hand, to enable rapid cutting. When cutting an elongated object such as a watch hand with a diamond tool or the like, cutting with a tool that reciprocates linearly along the longitudinal direction of the workpiece is preferable in terms of accuracy and surface quality. The inertia is large and the cutting speed cannot be increased to a speed suitable for a diamond tool.
[Oil] Publication No. JPS5552980 relates to a hand for a watch by the steps of dieing out press a shaft hole on a band material, then finishing the surface of the band material by a diamond cut or honing or the like, masking it, and then punching the hand from the band material by dieing out press. Which holes the shaft of an movement is inserted. Then, the surface of the band material is finished as designated by a diamond cut or honing process. Then, a masking is coated on the surface of the band material 1 so as not to scratch it nor adhere dusts thereon by coating or the like. Then, the band material is pressed to punch the hand therefrom.
[012] Publication No. JPS5596477 relates to a watch hand excellent both in the appearance and the quality by applying a wet plating and dryplating to the watch hand made of aluminum in a proper combination. A plated aluminum watch hand. Conventionally, a watch hand is mainly made of brass, and gold, rhodium or the like is attached to this by wet plating to finish it with a good appearance. In recent years, instead of brass hands to reduce the torque of quartz wristwatches, aluminum hands have been used and the j-resistance has also been improved.
[013] Publication No. JPS6471629 relates to the reduction of labor and the improvement of yield rate in a stable process by forming a center hole by press work in a metal belt material, finishing a surface, performing trimming die of external shape by press work excepting both ends, forming a coating layer, fixing

a member to the center hole thereafter cutting the belt material. Fixing a pipe member engaged with a watch movement, to be continuously calked to the center hole of the coated belt material, finally cutting the pointed end and the terminal end of a second hand of the belt material, the belt material is dropped by trimming into a predetermined length, obtaining the second hand.
[014] Publication No. CN 108705207 relates to a cutting method and a cutting device for a brittle material substrate with a metal layer which can be used to perfectly cut a brittle material substrate with the metal layer via a simple process. A laser beam (LI) of a burst laser string of a pulsed laser beam is transmitted through an aberration generating lens (4c) which generates aberration, and an aberration laser beam (L2) is generated; a most focused portion of the aberration laser beam (L2) is scanned along a predetermined cutting line on a brittle material substrate (Wl) of a matrix of the brittle material substrate (W) with the metal layer, and a cutting groove (V) is formed on the metal layer (W2) while a modified layer (K) having a reduced strength is formed on the brittle material substrate (Wl).
[015] Patent No. US5303540 relates to a fine jewelry diamond cut rope chain comprising a double helix rope chain made from tightly interfitting links of precious metal, each link having a small gap formed therein so as to enable one of said links to pass through the gap of a second link, said links being intertwined to fit tightly one against another, characterized in that at least some of the links of the chain comprise a high luster diamond cut shallow band or strip extending along the surface of at least part of their outer perimeter. Precious metal wire chain links and methods of manufacture are also claimed.
[016] Publication No. CN 108723405 relates to a high-performance cutting tool. The high-performance cutting tool comprises a cutting tool body. The cutting tool body comprises a tool frame. The left side of the tool frameis fixedly connected with a tool bit. The tool bit is internally and fixedly connected with a blade. The

tool bit is internally provided with a blade groove. The blade is connected with the tool bit through the blade groove. The outer side of the tool bit is provided with an open groove, and the blade extends to the outer side of the tool bit through the open groove, when the cutting tool is damaged, it does not need to change the whole cutting tool body, only the blade needs to be changed, and the saving effect is achieved; and by means of the open groove, the outer sharp part of the outer side of the blade extends to the outer side of the tool bit to cut a metal material.
[017] Publication No. JPS5552980 relates to a hand for a watch by the steps of dieing out press a shaft hole on a band material, then finishing the surface of the band material by a diamond cut or honing or the like, masking it, and then punching the hand from the band material by dieing out press. The pilot hole 3 is used for positioning at the time of post-processing, and is used in conventional continuous press processing. Next, surface finishing such as diamond cutting and honing is applied to the surface portion of the strip including the hole. Since the diamond cutting is performed on the strip, no vibration occurs even if the strip is thin, and the processing load is reduced. Next, masking is performed on the surface of the strip having the surface finish.
[018] Publication No. CN207479749 relates to a saw blade for metal cutting, include the saw bit body and fix the cermet tool bit on the tool bit seat of saw bit body, the rake face of tool bit is to the sunken straight angle that is in inboard, the department of buckling of rake face still is equipped with the chip -breaker one, still be equipped with one the tip chamfer on the back knife face top terminal surface of tool bit, back knife face both sides still are equipped with the chip dividing groove, still be equippedwith the burden chamfered edge on the blade of tool bit one, still be equipped with two fixed slots on the tool bit seat, the both sides of two fixed slots respectively are equipped with a mounting hole.
[019] Publication No. CN208584421 relates to a stand wear and tear type diamond -impregnated wheel, kink, rubber pad, rubber ring, conducting strip

under base member, metal, the base member top is provided with the grinding stationary plane, grinding stationary plane top is provided with diamond segments, the base member outside is provided with the side cut, the base member inboard is provided with inside fixed lug, be provided with in the side cut and put the first edge on a knife or a pair of scissors, inside fixed lug top is provided with kink on the metal, inside fixed lug below is provided with kink under the metal, on the metal kink with be provided with the metal covering edge installation department under the metal between the kink.
|020] Publication No. CN206677211 relates to a high performance cutting tool, including cutting tool, cutting tool includes the tool frame, the left side fixedly connected with tool bit of tool frame, the inside fixedly connected with blade of tool bit, the blade groove has been seted up to the inside of tool bit, the blade is connected with the tool bit through the blade groove, the fluting has been seted up in the outside of tool bit, and the blade extends to the outside of tool bit through the fluting.
[021] Generally watch hands has single front face. Multi- faceted hands as the name suggest provide more than single face to watch hands and enhance the detailing & look. This is as high precision & complicated process which involves special tools and machineries.
[022] Present invention aims to provide a semi-automatic system/ device for getting mirror finish polish on the cutting surface
OBJECTS OF THE INVENTION
|023] The principal object of the present invention is to provide system/ device used is a diamond tool which is used for getting mirror finish polish on the cutting surface.

[024] Another object of the present invention is to provide semi- automatic diamond faceting system/ device is used for cutting one to three faces maximum of watch hands
SUMMARY OF THE INVENTION
[025] Present invention relates a multi-faceting and multi-finishing of watch hands in strips. The present invention relates to a semi- automatic diamond multi faceting system/ device is used for cutting one to three faces maximum. The semi¬automatic diamond faceting system/ device is used for cutting one to three faces maximum. The functioning of machine is automatic thus the operator has to feed the fixture plate containing watch hands during each cycle.
[026] The diamond cutting machine consists of 2 spindles. These spindles are mounted on screw rods so that the spindle head can be adjusted in X,Y & Z axis. Spindles are connected to a motor which rotates the spindle to an RPM of 2700. Spindle has separate tool holders on which the diamond tool is mounded. During machining operation either one or both spindles are used based on the diamond cut finish requirement. PLC is used to control the machine operation.
BRIEF DESCRIPTION OF DRAWINGS
[027] It is to be noted, however, that the appended drawings illustrate only typical embodiments of this invention and are therefore not to be considered for limiting of its scope, for the invention may admit to other equally effective embodiments.
[028] Figure 1, 2 and 3 shows a diamond cutting machine for diamond cutting of watch hands in strip according to the present invention.
DETAILED DESCRIPTION OF INVENTIONS
[029] Accordingly, the present invention relates a diamond cutting machine for diamond cutting of watch hands in strip. Semi-automatic diamond faceting system/ device is used for cutting one to three faces maximum. The functioning of

machine is automatic thus the operator has to feed the fixture plate containing watch hands during each cycle. The watch hands are arranged on a brass fixture and are glued on to the plate using special adhesive. The brass fixture plate has individual marking for locating the hands and is arranged perpendicular to the fixture plate. The fixture plate is then placed on the machine servo bed which can feed the plate in consecutive positions using servo motor. The pitch can be programmed to requirement. When the cycle is on the spindles starts rotating and the bed which is holding the fixture plate travels up. Once faceting operation is completed the bend travels down and moves to the next pitch..This process is repeated until all the hands on the fixture plate is faceted.
[030] Referring to the figure I, semi-automatic diamond faceting machine consists of base 1, vertical column 2, servo table 3, 2 spindles 4, PLC & HMI control 5, camera6 with led screen 6a and control box 7 where all electrical and PLC controls are placed.
[031] Base gives support and rigidity to the machine and also acts as a reservoir for the cutting fluids. The column is the main supporting frame mounted vertically on the base. The column is box shaped, heavily ribbed inside and houses all the driving mechanisms for the spindle and table feed. Table is mounted on to the column and is fixed on to the column. It provides support to the cutting operation. The table is made of cast iron, its top surface is accurately machined and servo bed is clamped on to it. The servo bed on the table is given motions in up down directions during the cutting cycle. The servo bed 8 feeds the fixture plate 9 on which the hands are placed in a designated pitch for cutting operation (figure 2). The bed is made of aluminium and pocket for placing the fixture plate 9 in machined on to it. The assembly is fixed using Ball screw and linear guides to achieve precise movements. The fixture plate 9 is fixed on the servo bed using vacuum pressure. The pitch movement can be programed based on the arrangement of hands on the fixture plate 9. The movement of the bed is controlled by PLC and a HMI is used to give inputs to the machine.

[032] The diamond cutting machine consists of 2 spindles. These spindles are mounted on screw rods so that the spindle head can be adjusted in X,Y axis 10 & Z axis 11 (figure 3). Spindles 4 are connected to a motor 4a which rotates the spindle to an RPM of 2700. Spindle 4 has separate tool holders on which the diamond tool is mounded. During machining operation either one or both spindles are used based on the diamond cut finish requirement. PLC is used to control the machine operation. Functions of spindle motor, cam motor servo bed pitch movement and feed rate during the cycle are all controlled by PLC. Human-machine interface (HM1) is a user interface or dashboard that connects an operator to a machine, here it is used to adjust the speed feed and pitch of the servo motor and also Cycle start and stop switches.
[033] A camera 6 is positioned between the spindles to visually inspect the cutting operation, the camera is fixed with a 20X zoom lens do that the operator can see magnified image on the led screen.
[034] The brass fixture 9 is accurately machine plates with dimensional tolerance
are maintained within 0.005 Micron. The fixture plates have 40 to 45 vertical
marking lines to precisely place the watch hands. The hands are glued on the
fixture using special adhesive. After the cutting operation the fixture plates are
submersed in solvents to remove the hands from the fixture. There are following
three typed of diamond faceting finishes,
a) Angle cut
[035] In Angle cut two spindles are stimulatingly used for the cutting operation. The diamond cutting tools will be mounted on both spindles. The spindles are tilted to a certain angle based on the requirement. The cutting action takes place on the both side of the watch hands thus forming an angular shape.
b) Radius cut

[036] In radius cut the diamond cutting tool will be mounted on only one spindle and uses only single spindle for cutting operation. The second spindle will be kept idle. The required radius is formed on the diamond cutting tool prior to the operation. During cutting operation the tool shaves the material from the watch hands thus forming the radius shape.
c) Flat cut
[037] In flat cut the diamond cutting tool will be mounted on only one spindle and uses only single spindle for cutting operation the second spindle will be kept idle. During cutting operation the tool shaves the material from the watch hands thus forming the flat shape.
[038] Once the machine cycle is in switch on condition a cam motor inside the column of the machine starts rotating and spindle heads also starts rotating. One lever which is located on the front side of the table is used for engaging or disengaging the cam mechanism. This mechanism is used for the servo bend up down movement. When the lever is engaged the servo bed travels upwards. The rotating spindle head is adjusted in XY axis to locate the cutting action on the watch hands on the fixture plate at the desired location. The Z axis is adjusted to get the desired depth of cut. Once the cutting is done servo bed travels downwards and moves to the next pre-set pitch to its next location. Once the setting is correctly done the machine can be set to automatic mode so the above mentioned process repeats continuously till the entire hands arranged on the fixture plate is faceted. Once completed the servo bed travels to its home position and operator replace the fixture plates. The operator visually checks the enhanced image while cutting operation takes place with the help of camera and led screen and makes necessary changes in the setting if needed.
[039] Thus box shaped column made of cast iron observes the machine vibration. Servo motor, screw rod are mounted with help of bearing and coupling to the

column, and it supporting all mechanical structure. Fixture holding bed is made up of aluminum and it has a vacuum pocket to hold the fixture by vacuum pressure. When the fixture is placed on bed it creates the sealing between aluminum bed and fixture. Pocket is connected to vacuum line. When vacuum switch is on it create bonding between aluminum bed and fixture. To remove fixture from aluminum bed just switch off the vacuum switch in human machine interface (HMI).
[040] When lever engaged to servo bed, it starts travel upward and downward in designated feed rate. Its travel accuracy is in 0.005 mm. The material removing depth can be adjusted by up and downward of direction of servo bed.
1041] Machine mounted with two spindles wherein the spindles operation depends on which finish is being done. When it is being operated with angular cutting process it uses two spindles. When it is operated with flat cutting process it uses single spindle remains one spindle is idle. PLC is used to control following machine operation by HMI:
• Pitch (Distance one watch hand to other)
• Servo bed Upward and downward movement
• Start operation
• Stop operation
• Spindle speed •. Feed
KDDU
Numerous modifications and adaptations of the system of the present invention will be apparent to those skilled in the art and thus it is intended by the appended claims to cover all such modifications and adaptations which fall within the true spirit and scope of this invention.

WE CLAIM

1. A diamond cutting machine for diamond cutting of watch hands in strip
consisting base to give support and rigidity to the machine and also acts as a
reservoir for the cutting fluids, the column is the main supporting frame mounted
vertically on the base, table is mounted on to provide support to the cutting
operation and servo bed is clamped on to it gives motions in up down directions
during the cutting cycle, the servo bed feeds the fixture plate on which the hands
are placed in a designated pitch for cutting operation, the assembly is fixed using
ball screw and linear guides to achieve precise movements, the fixture plate is
fixed on the servo bed using vacuum pressure, the pitch movement can be
programed based on the arrangement of hands on the fixture plate and the
movement of the bed is controlled by PLC and a HM.I is used to give inputs to the
machine.
2. The diamond cutting machine for diamond cutting of watch hands in strip as claimed in claim 1 wherein the column is box shaped, heavily ribbed inside and houses all the driving mechanisms for the spindle and table feed
3. The a diamond cutting machine for diamond cutting of watch hands in strip as claimed in claim I wherein the bed is made of aluminium and pocket for placing the fixture plate in machined on to it and when the fixture is placed on bed it creates the sealing between aluminum bed and fixture, pocket is connected to vacuum line, when vacuum switch is on it create bonding between aluminum bed and fixture.
4. The a diamond cutting machine for diamond cutting of watch hands in strip as claimed in claim I wherein when the lever is engaged the servo bed travels upwards, the rotating spindle head is adjusted in XY axis to locate the cutting action on the watch hands on the fixture plate at the desired location, the Z axis is adjusted to get the desired depth of cut and once the cutting is done servo bed travels downwards and moves to the next pre-set pitch to its next location.

5. The a diamond cutting machine for diamond cutting of watch hands in strip as claimed in claim 1 wherein the diamond cutting machine consists of 2 spindles mounted on screw rods so that the spindle head can be adjusted in X,Y & Z axis, Spindles are connected to a motor which rotates the spindle that has separate tool holders on which the diamond tool is mounded, during machining operation either one or both spindles are used based on the diamond cut finish requirement and PLC is used to control the machine operation. Human-machine interface (HMI) is used to adjust the speed feed and pitch of the servo motor and also Cycle start-and