FJELD OF INVENTION:
[001] The present invention relates to the field of watch hands. The present
invention in particular relates to a system and method for chamfering and collar
cutting in watch hand manufacturing.
5 DESCRIPTION OF THE RELATED ART:
[002] Chamfering removes the burrs and sharp edges in watch hands. Chamfering
can be done by a form tool having angle equal to chamfer which is generally kept .
at 45°. Collar cutting process is levelling collar height and removing of excess
height of Watch hands collar.
I 0 [003] Reference may be made to the following:
[004] Publication No. CN II 0711906 relates to a hole integrated treatment device
and a machining device. The hole chamfering treatment assembly comprises a
sleeving piece, a fixing piece, an elastic piece and a chamfering piece. The sleeving
piece, the elastic piece and the chamfering piece are used for being arranged outside
15 a hole machining piece in a sleeving mode. The fixing piece is used for fixing the
sleeving piece to the hole machining piece. One end of the elastic piece is connected
with the sleeving piece, and the other end of the elastic piece is connected with the
chamfering piece. The elastic piece is used for making at least part of the
chamfering piece arranged outside a hole machining end of the hole machining
20 piece in a sleeving mode in a natural state. The chamfering piece is used for
compressing the elastic piece in a stressed state and making at least part of the
chamfering piece get away from the hole machining end of the hole machining
p1ece.
[005] Publication No. JPH07328842 relates to control knife pressing force so that
25 a uniform chamfering length can be obtained without being influenced by a
difference in a mechanical loss, plate thickness waving or the like of a strip material. .....
0 ..... ..... N Informations on a construction material (h), a plate thickness (t) and a chamfering
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length (m) of a strip material are inputted to a control device from a storage device,
and pressure (SP) is set by an expression [SP=f (h.t.m)] to perform operation on
prescribed air pressure, and the preset pressure (SP) acts on a piston, and a knife is
pressed against the strip material. A measured value (F) of knife pressing force is
5 fed back to the control device from a measuring instrument. Operation is performed
on a difference between knife pressing force (SF) (corresponding to the preset
pressure (SP) and the measured value (F) of the knife pressing force by an air
pressure conversion value [DELTAP=f(SF-F)]. Necessary knife pressing force (P)
is corrected by (P= SP+AP), and a command is issued to an automatic pressure
I 0 governor, and the knife pressing force is controlled so as to become (SF=F).
[006] Publication No. CN20511 0945 relates to a stainless steel steel pipe. chamfer
device, it relates to stainless steel apparatus technical field, the supporting legs is
installed to the bottom of frame, the mounting bracket is installed to the upper end
of frame, install the binding clasp on the mounting bracket, install on the cramp bar
15 of binding clasp and press from both sides tight piece, the dri~er is installed to the
right -hand member of mounting bracket, install the dog on the actuating lever of
driver, electronic slide rail mechanism is installed to the inside right -hand member
of frame, install driving motor on the slider of electronic slide rail mechanism,
install chamfering tool in driving motor's the pivot, the operation panel is equipped
20 on the frame, the internally mounted of frame has the intelligent control ware,
operating panel is connected with the input of intelligent control ware, the output
of intelligent control ware respectively with the binding clasp, the driver, electronic
slide rail mechanism, driving motor connects, the utility model discloses be
convenient for realize quick the clamp tightly and the chamfer, convenient to use,
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easy and simple to handle, work efficiency is high, saves time.
[007] Publication No. CN209094646 relates to a cutting and chamfering auxiliary
device, and relates to the technical field of die auxiliary equipment. The cutting and
chamfering au xi I iary device comprises a backer part, the backer part comprises a
fixed plate and a movable plate; wherein a first bevel edge is arranged on the fixed
plate, a second bevel edge is arranged on the movable plate, a bayonet is formed
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between the first bevel edge and the second bevel edge, the shape of an opening of
the bayonet is matched with the shape of a to-be-chamfered part of a. to-bemachined
work piece, and the length of the opening of the bayonet. can be
configured to be equal to that of the to-be-chamfered bevel edge of the to-be-
5 machined work piece. According to the cutting and chamfering auxiliary device,
the backer part is arranged on the cutting and chamfering auxiliary device, so that
backer cutting can be performed when a pneumatic shear is used for cutting and
chamfering a part, and the cutting precision is guaranteed. The fixed plate and the
movable plate are arranged on the backer part, an operator adjusts the opening
I 0 length of the bayonet by adjusting the movable plate, the flexibility is high, the
adjusting process can be completed with one hand, and operation is convenient..
[008] Publication No. KR200219933 relates to chamfer the end of the hollow pa1t
side of the hole drilled from the outside into the hollow part from the outside with
compressed air pressure, and a hose (The tip of I) and one end ofthe pipe member
15 are connected by a valve, a nozzle is installed on the inner surface of the other end
of the pipe member, and the support is It is installed on the outer surface of the other
end of the pipe member, the rotary tool body is rotatably installed on the support,
and the tool movement preventing member is the pipe member It is rotatably
installed in the central portion of the, and consists of an elastic member is installed
20 between the pipe member and the tool movement preventing member, the present
invention by the air pressure ejected from the nozzle
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[009] Publication No. CN I 09047943 relates to a deburring device for machining,
comprising a hand-held portion. A first riser is disposed above the hand-held
portion; an indexing rotation device is disposed above the first riser; the indexing
rotation device is used to realize the transposition of a plurality of different cutter
heads; a second riser is disposed above the indexing rotation device, a height
adjusting device for assisting the working of the indexing rotation device is
disposed on the second riser; the cutter heads perform the transposition operation
when the height adjusting device is raised; the positioning of the cutter heads are
realized when the height adjusting device is reset; a third riser is disposed on the
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top of the height adjusting device; a multi-function cutter heads assembly for
deburring is disposed above the third riser. The deburring device for machining has
simple structure, and can realize automatic chamfering to remove burrs on the
circumference of the hole and the edge; the deburring device liberates the work
5 force, improves the efficiency of machining, and reduces the overall economic cost.
The deburring device for machining is suitable for removing burrs of work pieces
of various materials, has a wide range of applications, has strong practicality, and
is worthy to be popularized.
[010] Publication No. CN21 0937326 relates to machining equipment, and provides
10 a special-shaped steel plate intelligent chamfering machining device which
comprises a moving mechanism, a chamfering machining mechanism, a steel plate
supporting mechanism, a detection mechanism, a numerical control operation box
and two linear bases arranged in parallel. The chamfering machining mechanism
comprises a chamfering machining mechanism connecting frame, a self-tool-
IS changing mechanical main shaft, a main shaft motor and a special milling cutter.
The chamfering machining mechanism connecting frame is fixed to the moving
mechanism, and a main shaft motor is fixed to the chamfering machining
mechanism connecting frame.
[011] Publication No. CN21 0755909 relates to a numerical control corner cutting
20 machine for a metal decoration strip. The uti I ity model belongs to the technical field
of chamfering equipment. The device comprises a rack and a bottom plate, the
bottom plate is installed on one side of the bottom of an inner cavity of the rack, a
pi ural ity of sets of stop blocks are installed on the surface of the top of the rack, a
ball screw sliding table is installed on one side of each stop block, a supporting plate
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is installed on the surface of the output end of the top of each ball screw sli~ing
table, and an electric mechanical arm is installed on the surface of the top of each
supporting plate. According to the utility model, the touch ali-in-one machine is
used; the ball screw sliding table can be controlled to operate; therefore, the electric
mechanical arm can be conveyed to a preset position; the electric mechanical arm
can slowly adjust the position of the laser cutting head; according to the metal
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decoration strip cutting device, the metal decoration strip can be subjected to multiangle
cutting treatment, so that the cutting angle is adjusted without stopping
equipment, the production efficiency is further improved, metal slag generated in
the cutting process of the surface of the metal decoration strip can be biO\:Vn away
5 through the fan and the spray head, and the subsequent metal decoration strip
cutting quality is improved.
[012] Publication No. KR20 110011227 relates to a chamfering machine using an
air tool, and more particularly, a rotating shaft on which a rotary cutter having a
plurality of cutting edges is mounted is inserted and installed to protrude downward
10 into the head of the air tool body. The lower end support bearing· supporting the
lower part of the rotary shaft is configured to be firmly supported by the inserted
rotary shaft support ring, so that the rotary shaft is caused by the impact force
generated when the cutting edge of the rotary cutter hits the work piece when
chamfering the work piece. The present invention relates to a chamfering machine
15 using an air tool that prevents this severe tremor and improves the durability of air
tools and rotary cutters, as well as reduces wrist pain and shoulder pain of workers,
thereby greatly improving workability.
[013] Publication No. CN 111729974 relates to an angle steel punching and
chamfering machining mechanism and an automatic production line. The angle
20 steel punching and chamfering machining mechanism comprises a frame, a
positioning mechanism arranged in the frame and at least one set of a punching
mechanism, a chamfering mechanism and a cutting mechanism which are fixed to
the frame through punch base's, wherein the positioning mechanism is used for
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fixing the position of angle steel, and the positioning mechanism co1~1prises a
punching die body corresponding to the punching mechanism and a chamfering die
body corresponding to the chamfering mechanism. The automatic production line
comprises the angle steel punching and chamfering machining mechanism.
According to the technical scheme, multiple functions of punching, chamfering,
kidney-shaped hole machining, fixed-length cutting; and the like special for angle
steel are integrated, and a device can complete various procedures only through
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one-time clamping, is convenient in operation, high in working efficiency, good in
machining precision, safe and labor-saving, energy-saving and environmentfriendly,
can be used for machining angle steel of different models through
adjustment of the die bodies, and is particularly suitable for performing punching
5 and chamfering on various angle steel in batches.
[014] Publication No. CN209380471 relates to the device comprises a chamfering
device, a pressing plate, a guide shaft, a sheath and abrasive paper, the chanifering
device is of a truncated cone structure, the abrasive paper matched with the
chamfering device in shape is arranged outside the chamfering device, a round
10 pressing plate used for pressing the large end of the abrasive paper is detachably
installed on the large end face of the chamfering device, and the guide shaft used
for pressing the small end ofthe abrasive paper is detachably installed on the small
end face of the chamfering device; a driving shaft for driving the chamfering device
to rotate is arranged on one side of the outer portion of the pressing plate, a shaft
15 body of the guide shaft is sleeved with a protective sleeve, the protective sleeve is
of a hollow cylindrical stepped sleeve structure, the outer diameter of the small end
ofthe protective sleeve is determined according to the hole diameter of a connector
hole of a work piece to be chamfered, and the driving shaft and the guide shaft are
located on the same axis. The portable pneumatic drill is simple in structure,
20 convenient to operate, small in size, high in universality and convenient to carry,
power can be provided only by holding the pneumatic drill by hand,,and the external
field adaptability is greatly improved. Chamfering machining of joints and lining·
holes with different sizes of all pa11s of an airplane can be achieved, the cost for
manufacturing special tools and special equipment is reduced, and the production
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efficiency is improved.
1015] Publication No. CN208728687 relates to a chamfering device belongs to
work piece processing equipment technical field. The device includes knife rest on
work piece chuck on lathe, the lathe, tailstock and big layer. board, the big layer
board, establish at the anterior sliding sleeve of dabber, rotate and locate the push
rod of spindle and articulate the connecting rod between push rod and sliding sleeve
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to locating dabber, cover on the tai I_ stock around along, big layer board can through
on the rotatory lathe the lead screw hand wheel drive the knife rest side -to -side
movement, big layer board seesaw can be followed to the knife rest, the sliding
sleeve front end is located along controlling to the slip to the knife rest, and the
5 dabber passes through the parallel key makes the sliding sleeve seesaw with sliding .
sleeve sliding connection and accessible push -and -pull push rod. The device
makes amendment on present lathe with the processing of adaptation chamfer,
through controlling original lead screw hand wheel feeding distance about
steerable, and adjustment that feeding distance around the push rod that increases
1 0 through control is steerable, length and location structure through the push rod fed
around can realizing, and the control of push rod is for the I ittle layer board of
control, the action is simple, swiftly.
[016] Publication No. CN 109333279 relates to a chamfering device body, a
pressing plate, a guide shaft, a protective sleeve and abrasive paper, wherein the
15 chamfering device body is of a truncated cone structure, the abrasive paper matched
with the chamfering device body in shape is arranged outside the chamfering
device, the large end face of the chamfering device body is detachably provided
with the round pressing plate used for pressing the large end ofthe abrasive paper,
and the small end face of the chamfering device body is detachably provided with
20 a guide shaft used for pressing the small end of the abrasive paper; a driving shaft
for driving the chamfering device body to rotate is arranged on ones ide of the outer
portion of the pressing plate, and a sheath sleeves a shaft body of the guide shaft,
and the sheath is of a hollow cylindrical stepped sleeve structure; the outer diameter
of the small end ofthe sheath is determined according to the aperture of a joint hole
25 of a machined part to be chamfered; and the driving shaft and the guide shaft are
arranged on the same axis. The device is simple in structure, convenient to operate,
· small in size, high in universality and convenient to carry, power can be provided
only by a hand-held pneumatic drill, and the external field adaptability is greatly
improved. Joint and bush hole chamfering machining of all parts, different in size,
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of an aircraft can be realized, the cost for manufacturing a special tool and special
equipment is reduced, and the production efficiency is improved.
[017) Publication No. CN209936551 relates to machining, including a base, a
cavity is formed in the base; a third motor is fixedly connected to the bottom wall
5 of the interior of the cavity; a rotating rod is tixedly connected to the output end of
the third motor, a rotating rod is fixedly connected to the upper end of the rotating
rod, the upper end of the rotating rod penetrates through the cavity and extends to
the outside, a clamping seat is fixedly connected to the other end of the rotating rod,
a mounting cavity is formed in the clamping seat, and a sliding opening is formed
I 0 in the top wall of the mounting cavity. According to the steel pipe chamfering
device, the rotating disc, the second threaded rod, the second moving strip, the arcshaped
clamping plate and the connecting block are arranged, the rotating disc is
rotated, the rotating disc drives t_he second threaded rod to rotate, the second
threaded rod drives the second moving strip to horizontally move, and therefore the
15 arc-shaped clamping plate fixes a steel pipe, stability of the steel pipe in the
chamfering process is guaranteed, hand holding is not needed, and stability is
higher.
[018] Publication No. CN209754190 relates to the charnfering device comprises a
first connecting plate, a second connecting plate and a chamfering head, one end of
20 the first connecting plate is connected with the end of the second connecting plate,
and a fixing piece used for fixing the first connecting plate and the second
connecting plate is arranged at the connecting end ofthe first connecting plate. The
end, away from the second connecting plate, of the first connecting plate is provided
with an output wheel connected with the chamfering head through a shaft, and the
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chamfering head and the output wheel are arranged on the two sides of the first
connecting plate correspondingly. A transition wheel is arranged at the end, close
to the first connecting plate, of the second connecting plate, a driving wheel is
arranged at the end, away from the transition wheel, of the second connecting plate,
a crank is arranged on the end face ofthe driving wheel, belts are arranged between
the transition wheel and the driving wheel and between the transition wheel and the
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output wheel, and a handle is arranged at the end, close to the driving wheel, of the
second connecting plate. The novel chamfering device provided by the utility model
is simple in structure and convenient to use, and solves the problem that a hole is.
chamfered at a position where a hand is not easy to stretch into.
5 [019] While doing collar drawing operation collars are. not in same height. It may
one side height more, F I I ~ '"i"' ,.... I"" .-, ill .-,. ..... . . ..., 4! 4! .,. J'll ~ - I 0 -
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for limiting of its scope, for the invention may admit to other equally effective
embodiments.
[025] Figure I shows a system for chamfering and collar cutting of watch hands
according to the present invention;
5 [026] Figure 2 shows collar cutting operation according to the present invention;
[027] Figure 3 shows chamfering operation according to the present invention;
DETAILED DESCRIPTION OF THE INVENTION:
[028] The present invention provides a system and method for cchamfering and
collar cutting of watch hands without any defect. The device comprises base I, table
I 0 2, ve1tical column 3, pneumatic strip feeder 4, strip holding bed 5, two spindles 6,
servo motor 7, collar cutting tool 8, chamfering tool 9, strip 10, and control panel
consisting operating functions, power button, and digital display controlled by
control panel (Fig I).
15
[029] 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 the entire
servo mechanisms for the spindle and table feed. The 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 strip feeder
20 and strip holding bed is clamped on to it. Hence the strip clamped on to the table
given motions in up down directiofls.
[030] Pneumatic Strip feeder is used to feed brass strip to the cutt~ng action. This is
operated using pneumatic cylinders. The feeder is adjusted to a certain pitch so that
each time when the strip feeder feeds the strip it moves repeatedly the exact same
25 pitch. There are two types of strip feeders i.e. push or pull. Chamfering and .collar
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[031] The strip holding bed is mounted on the table. During the operation the brass
strip is passed through the strip holding bed and it clamps the brass strip firmly
while the cutting action takes place. This bed consists of 2 polyurethane rubber
pads, these pads acts as cushioning so that the strip won't get damaged. The
5 Chamfering and collar 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 Milling and chamfering tool are
mounded. Servo motor is used to control the Z axis accurate movement to perform
10 cutting operation. The servo motor and machine fully controlled by PLC unit.
Digital display displays keyed in values.
[032] The brass strip is fed by a coiler, which holds the coil of strip which is needed
to be chamfering and collar cutting operation. The strip is then passed through the
strip holding bed which is mounted on the machine table and the strip exists through
15 the pneumatic strip feeder.
[033] Once the machine is in switch on spindle are in random position, by operating
home button on digital display spindle are positioned to pre-determined position.
The rotating spindle head is adjusted in XY axis to locate the cutting action on the
brass strip collar at the desired location. The Z axis is adjusted to get the desired
20 depth of cut. Once the cutting is done the strip holding bed releases the brass strip
and the pneumatic strip feeder feeds Lhe brass strip 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 (fig 2 and 3).
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[034] 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:
I. A chamfering and collar cutting device for watch hands comprises:
A base I with column 3 mounted vertically on the base 1_ to provide
support to the cutting operation characterized in that table 2 with its top
surface is accurately machined and strip feeder 4 and strip holding bed 5
clamped on to it to giver given motions in up down directions to the
clamped strip 10.
Pneumatic Strip feeder 4 operated usmg pneumatic cylinders and is
adjusted to a certain pitch so that each time when the strip feeder 4 feeds
the strip it moves repeatedly the exact same pitch characterized in that pull
type strip feeders.
The strip holding bed 5 characterized in that of two polyurethane rubber
pads mounted on the table 2.
a motor 7 which rotates the spindle 6.
The brass strip is fed by a coiler, which holds the coil of strip 10 and is
then passed through the strip holding bed which is mounted on the
machine table and the strip exists through the pneumatic strip feeder.
collar cutting tool 8 and chamfering tool 9 mounted on separate tool
holders.
control panel consisting operating functions, power button, arid digital
display controlled by control panel.
Wherein
once the machine is in switch on spindle are in randor:n position, by operating
home button on digital display spindle are positioned to pre-determined
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. position; rotating spindle head is adjusted in XY axis to locate the cutting
action on the brass strip collar at the desired location; Z axis is adjusted to get
the desired depth of cut; once the cutting is done the strip holding bed releases
the brass strip and the· pneumatic strip feeder feeds the brass strip 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. ·
2. The chamfering and collar cutting device for watch hands, as claimed in claim
1, wherein the brass strip is passed·through the strip holding bed and it clamps
the brass strip firmly while the cutting action takes place.
3. The chamfering and collar cutting device for watch hands, as claimed in claim
I, wherein the two spindles are mounted on screw rods so that the spindle
head can be adjusted in X, Y & Z axis and are connected to a motor which
rotates the spindle