CN112719157A

CN112719157A - Double-beating copper strip forming machine

Info

Publication number: CN112719157A
Application number: CN202110149099.1A
Authority: CN
Inventors: 黎爱兵
Original assignee: Shenzhen Libing Copper Belt Machine Co ltd
Current assignee: Shenzhen Libing Copper Belt Machine Co ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-04-30

Abstract

The invention discloses a double-beating copper strip forming machine which comprises a rack, wherein a die set is arranged on the rack, and an upper die base and a lower die base are arranged on the die set. The copper strip feeding mechanism is positioned above the resistance feeding mechanism and comprises a fixed plate fixedly arranged on the die carrier, a movable gear and two movable plates in sliding fit with the fixed plate are arranged on the fixed plate, the movable gear is positioned in the center of the front side of the fixed plate, the two movable plates are rotationally and symmetrically arranged by taking the movable gear as a center, and the movable plates are provided with rack parts which extend towards the movable gear and are meshed with the movable gear. Each movable plate is provided with a copper strip feeder. The invention has the beneficial effect that the terminal crimping of the electronic devices with different lengths can be realized.

Description

Double-beating copper strip forming machine

Technical Field

The invention relates to the technical field of copper strip compression joint equipment, in particular to a double-beating copper strip forming machine.

Background

The existing double copper tape beating machine, such as the novel double copper tape beating machine disclosed in chinese patent 201821312885.9, can only realize punching and forming two copper tapes with fixed spacing, so that terminal crimping is performed for a resistor with a length, and the application range is limited.

Disclosure of Invention

Aiming at the problems in the prior art, the invention mainly aims to provide a double-beating copper strip forming machine which can realize terminal crimping on electronic devices with different lengths.

In order to achieve the purpose, the double-beating copper strip forming machine provided by the invention comprises a rack, wherein a die set is arranged on the rack, and an upper die base and a lower die base are arranged on the die set; the copper strip feeding mechanism is positioned above the resistance feeding mechanism and comprises a fixed plate fixedly arranged on the die carrier, a movable gear and two movable plates in sliding fit with the fixed plate are arranged on the fixed plate, the movable gear is positioned in the center of the front side of the fixed plate, the two movable plates are rotationally and symmetrically arranged by taking the movable gear as the center, and the movable plates are provided with rack parts which extend towards the movable gear and are meshed with the movable gear;

each movable plate is provided with a copper strip feeder.

Optionally, the copper strip feeder comprises a mounting plate, and a first linear module, a first backstop and a second backstop which are sequentially arranged on the mounting plate along the advancing direction of the copper strip, wherein the first backstop is arranged on a slide block of the first linear module, and the copper strip sequentially passes through the first backstop and the second backstop;

the first backstop device and the second backstop device comprise L-shaped fixed blocks, swinging blocks and springs; the fixed block is provided with a material passing groove arranged along the advancing direction of the copper strip, a movable cavity communicated with the material passing groove is arranged above the material passing groove, the swinging block is rotatably arranged in the movable cavity through a rotating shaft, and the lower end part of the swinging block extends towards the material passing groove and is abutted against the copper strip crossing the material passing groove; the spring is arranged at the upper part of the movable cavity, one end of the spring is abutted against the fixed block, and the other end of the spring is abutted against one side of the swinging block where the copper strip is reversed to advance.

Optionally, a side plate is arranged at one end of the fixing plate, an adjusting rod is arranged on the side plate, one end of the adjusting rod extends into the movable block close to the adjusting rod and is connected with the movable block in a threaded fit mode, and a handle is arranged at the other end of the adjusting rod.

Optionally, the resistance feeding mechanism comprises two oppositely arranged support side plates, a stepper arranged between the two support side plates, a material taking device arranged between the discharging sides of the two support side plates and the lower die base, and a driver for driving the stepper to feed materials step by step;

the stepper comprises a first stepper and a second stepper which are symmetrically arranged, and the first stepper and the second stepper comprise a gear piece seat, a fixed gear piece and a reciprocating gear piece; the tooth piece seat is fixed on the inner side of the support side plate, the fixed tooth piece is fixed on the tooth piece seat, and the reciprocating tooth piece is positioned on the inner side of the fixed tooth piece and is in sliding fit with the fixed tooth piece; a connecting shaft is arranged between the reciprocating tooth plate of the first stepper and the reciprocating tooth plate of the second stepper, a power input shaft in transmission connection with a driver is arranged below the connecting shaft, an eccentric wheel is arranged on the power input shaft, and the connecting shaft is in transmission connection with the eccentric wheel through a crank;

the material taking device comprises a second linear module arranged along the advancing direction of the resistor and a fixed seat fixed on a sliding block of the second linear module, and a rotating shaft and a rotating motor for driving the rotating shaft to rotate are arranged on the fixed seat; the rotating shaft is provided with a swing arm vertically connected with the rotating shaft, the free end of the swing arm is provided with a first clamping groove, and a magnetic part for adsorbing a resistor is arranged in the first clamping groove.

Optionally, a feeding side of the stepper is provided with a pause wheel, the pause wheel is arranged on the two bracket side plates through a first rotating shaft, and the first rotating shaft is in transmission connection with the power input shaft through a synchronous belt;

and the intermittent wheel is provided with second clamping grooves which are uniformly distributed along the circumferential direction of the intermittent wheel, and magnetic parts for adsorbing resistors are arranged in the second clamping grooves.

Optionally, the upper die holder comprises a die holder body, a die holder, two dies, an upper knife holder, an upper knife and a lower knife holder;

the die holder is characterized in that a central sliding groove is formed in the center of the front side of the die holder body, the punching tool holder is arranged in the central sliding groove in a sliding mode, a slot is formed in the center of the punching tool holder, and the upper cutting tool holder is inserted into the slot and is in intermittent transmission connection with the punching tool holder; the lower end of the upper cutter seat is provided with an extension part protruding out of the insertion groove, and the upper cutter is detachably arranged on the front side surface of the extension part;

the lower end of the punching tool seat is concavely provided with two strip-shaped grooves with downward openings and symmetrically arranged at two sides of the slot, the front side wall of each strip-shaped groove is provided with a first strip-shaped hole communicated with the corresponding strip-shaped groove, the upper ends of the two punching tools are respectively inserted into the strip-shaped grooves and fixed on the punching tool seat through a fastener penetrating through the first strip-shaped holes, and the lower ends of the punching tools are inserted into the upper cutting tools;

the lower cutter seat is detachably arranged at the lower end part of the die holder body.

Optionally, the die holder body is concavely provided with two bottom chutes, the two bottom chutes are downward opened and symmetrically arranged on two sides of the central chute, a forming tool apron is arranged in the bottom chute in a sliding manner, a forming tool is arranged on the forming tool apron, a tool opening part of the forming tool penetrates out of one side of the forming tool apron and extends to the lower part of the upper cutter, and an elastic part for applying pressure to the forming tool apron is arranged on the other side of the forming tool apron;

swing arm pieces corresponding to the two forming tool holders are arranged on two sides of the central sliding groove, the upper end of each swing arm piece is rotatably connected to the die holder body, a U-shaped groove is formed in the lower end of each swing arm piece, a cylindrical piece is arranged on each forming tool holder, and the U-shaped groove in the lower end of each swing arm piece is movably clamped on the cylindrical piece.

Optionally, the lower die base comprises a bottom plate and two fixed lower dies and a movable lower die which are arranged oppositely;

two sides of the bottom plate are provided with four second strip-shaped holes penetrating through the bottom plate, and the bottom plate is fastened on the rack through bolts penetrating through the second strip-shaped holes;

the mounting area of the bottom plate is provided with two third strip-shaped holes which are arranged in parallel, and the movable lower die is fastened on the bottom plate through bolts penetrating through the third strip-shaped holes.

Optionally, the fixed lower die comprises an outer fixed seat, an inner fixed seat and a forming die, the outer fixed seat is fixed on the bottom plate, the inner fixed seat is fixed on the outer fixed seat, the inner fixed seat is provided with a vertically arranged slot, a wedge-shaped sliding block capable of sliding along the slot bottom is arranged at the slot bottom of the slot, the forming die is inserted into the slot, and the bottom surface of the forming die is in sliding fit with the top surface of the wedge-shaped sliding block;

the outer fixing seat is provided with a knob and a screw rod, the screw rod is arranged on the outer fixing seat through a screw rod seat, the knob is fixed at the first end of the screw rod, the second end of the knob extends towards the wedge-shaped sliding block, is inserted into the wedge-shaped sliding block and is connected with the wedge-shaped sliding block in a thread fit mode.

Optionally, a material roll support is arranged above the copper strip feeding mechanism, and the copper strip material roll is arranged on the material roll support.

The resistance feeding mechanism and the copper strip feeding mechanism are arranged on the feeding side of the die carrier, and the copper strip feeding mechanism is positioned above the resistance feeding mechanism. The copper strip feeding mechanism comprises a fixed plate fixedly arranged on the die carrier, a movable gear and two movable plates in sliding fit with the fixed plate are arranged on the fixed plate, the movable gear is located in the center of the front side of the fixed plate, the two movable plates are arranged in a rotational symmetry mode by taking the movable gear as a center, and the movable plates are provided with rack portions extending towards the movable gear and meshed with the movable gear. Each movable plate is provided with a copper strip feeder,

therefore, when the resistor is conveyed to the lower die base through the resistor feeding mechanism, the copper strip is conveyed to the upper die base through the copper strip feeding mechanism, and then the copper strip is riveted and pressed on pins at two ends of the resistor through the upper die base.

The two copper strips are respectively conveyed from the copper strip feeders on the two movable plates, when the distance between the two copper strips needs to be adjusted, one movable plate can be moved, the other movable plate is driven by the movable gear to move towards or away from the movable gear, so that the distance between the two copper strip feeders is adjusted, the distance between the two copper strips is adjusted, the two copper strips are conveyed to the upper die base to be subjected to copper strip crimping, and the copper strip crimping die is suitable for terminal crimping of resistors with different lengths.

Compared with the prior art, the double-beating copper strip forming machine provided by the invention can realize automatic feeding of the resistor and the copper strip, and complete efficient copper strip compression joint on the terminals of pins at two ends of the resistor; and the interval between the copper strips can also be adjusted to the electron of adaptation different length carries out the terminal crimping, and application scope is extensive.

Drawings

FIG. 1 is a perspective view of an embodiment of the present invention;

FIG. 2 is a perspective view of another embodiment of the present invention;

FIG. 3 is a schematic view of the copper strip feeding mechanism and the resistance feeding mechanism in cooperation with the upper die holder and the lower die holder according to an embodiment of the present invention;

FIG. 4 is a schematic perspective view of a copper strip feeding mechanism according to an embodiment of the present invention;

FIG. 5 is a top view of a copper strip feeding mechanism in an embodiment of the present invention;

FIG. 6 is a side view of a copper strip feeding mechanism in an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a first backstop and a second backstop according to an embodiment of the present invention;

FIG. 8 is a schematic perspective view of a resistor feeding mechanism according to an embodiment of the present invention;

FIG. 9 is a schematic perspective view of another view of a resistor feed mechanism in accordance with an embodiment of the present invention;

FIG. 10 is a schematic diagram of the internal structure of a resistor feeding mechanism according to an embodiment of the present invention;

FIG. 11 is a front view of the internal structure of a resistor feed mechanism in an embodiment of the invention;

FIG. 12 is a schematic view of the internal structure of the upper mold base according to an embodiment of the present invention;

FIG. 13 is a partially exploded view of the upper die base in accordance with one embodiment of the present invention;

FIG. 14 is a schematic structural view of a lower die holder according to an embodiment of the present invention;

FIG. 15 is an exploded view of the stationary and movable lower dies and the base plate in accordance with one embodiment of the present invention;

FIG. 16 is a schematic view of the internal structure of a stationary lower die according to an embodiment of the present invention;

fig. 17 is a perspective view of another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6 in the specification, an embodiment of the present invention provides a double copper strip forging machine, which includes a frame 100, a mold base 110 disposed on the frame 100, and an upper mold base 200 and a lower mold base 300 disposed on the mold base 110. The resistance feeding mechanism 400 and the copper strip feeding mechanism 500 are arranged on the feeding side of the die carrier 110, the copper strip feeding mechanism 500 is positioned above the resistance feeding mechanism 400 and comprises a fixed plate 510 fixedly arranged on the die carrier 110, a movable gear 511 and two movable plates 520 in sliding fit with the fixed plate 510 are arranged on the fixed plate 510, the movable gear 511 is positioned in the center of the front side of the fixed plate 510, the two movable plates 520 are rotationally and symmetrically arranged by taking the movable gear 511 as the center, and the movable plates 520 are provided with rack parts 521 which extend towards the movable gear 511 and are meshed with the movable gear 511. Each movable plate 520 is provided with a copper strip feeder 530.

As shown in fig. 8, the resistance feeding mechanism 400 includes a stepper 410, a picker 420, and a driver 430. The stepper 410 is used to transport the resistor and is fixed to the frame 100 by two opposing bracket side plates 470. The picker 420 is used to transfer the resistor feeder 410 onto the lower die bed 300, which is disposed between the outfeed side of the stepper 410 and the lower die bed 300. The driver 430 is used for driving the stepper 410 to perform step feeding, and includes a first servo motor 431 and a first reducer box 432, wherein the first servo motor 431 is disposed on the first reducer 432 and is in transmission connection with a speed reducing mechanism in the first reducer 432. The housing of the first reducer 432 is fixed to the bracket side plate 470 at the outside and is drivingly connected to the stepper 410.

As shown in fig. 10 to 11, the stepper 410 includes a first stepper 411 and a second stepper 412 symmetrically disposed, the first stepper 411 and the second stepper 412 are identical in structure, and taking the first stepper 411 as an example, the first stepper 411 includes a tooth holder 4111, a fixed tooth 4112, and a reciprocating tooth 4113, and upper end surfaces of the fixed tooth 4112 and the reciprocating tooth 4113 have tooth-shaped structures with the same structure. The rack base 4111 is fixed inside the bracket side plate 470, the fixed rack 4112 is fixed on the rack base 4111, and the reciprocating rack 4113 is located inside the fixed rack 4112 and slidably fits with the fixed rack 4112.

A connecting shaft 413 is arranged between the reciprocating toothed sheet 4113 of the first stepper 411 and the reciprocating toothed sheet of the second stepper 412, a power input shaft 414 in transmission connection with a driver 430 is arranged below the connecting shaft 413, an eccentric 415 is arranged on the power input shaft 414, and the connecting shaft 413 is in transmission connection with the eccentric 415 through a crank 416.

Ratchet wheels 440 are respectively provided at discharge sides of the first and

second steppers

410 and 410, a cutter 450 is provided above the ratchet wheels 440, the ratchet wheels 440 are provided on the two bracket side plates 470 through second rotating shafts 441, and the cutter 450 is provided on the two bracket side plates 470 through fixing shafts 451. The second rotating shaft 441 is in transmission connection with the power input shaft 414 through a timing belt 433.

The working principle of the invention is as follows: the resistor enters the stepper 410 from the feeding side of the stepper 410, and pins at two ends of the resistor are respectively lapped in tooth grooves in the fixed tooth plates 4112 of the first stepper 411 and the second stepper 412; the driver 430 drives the power input shaft 414 to rotate, and the power input shaft 414 drives the two reciprocating blades 4113 connected to the connecting shaft 413 to reciprocate through the crank 416, so as to drive the resistor to advance toward the ratchet wheel by a distance of one inter-tooth space, and make the resistor closest to the ratchet wheel fall from the fixed blade 4112 into the tooth groove of the ratchet wheel. Meanwhile, the driver 430 drives the second rotating shaft 451 to rotate, so as to drive the ratchet wheel 440 to move relative to the cutter 450, cut off the redundant pins at the two ends of the resistor, and the cut resistor is sent to the lower die holder 300 by the extractor 420.

In the process of feeding the resistor, the copper strip feeder 530 simultaneously feeds two copper strips into the upper die holder 200, after the copper strips enter the upper die holder 200, the upper die holder 200 moves towards the lower die holder 300 to cut the copper strips and bend the copper strips into U-shaped pieces, and when the upper die holder 200 contacts with the lower die holder 300, a punching knife in the upper die holder 200 rivets the U-shaped pieces onto pins at two ends of the resistor.

According to the invention, the resistance feeding mechanism 400 and the copper strip feeding mechanism 500 are arranged on the feeding side of the die carrier 110, and the copper strip feeding mechanism 500 is positioned above the resistance feeding mechanism 400. The copper strip feeding mechanism 500 includes a fixed plate 510 fixedly disposed on the mold frame 110, a movable gear 511 and two movable plates 520 slidably engaged with the fixed plate 510 are disposed on the fixed plate 510, the movable gear 511 is disposed at the center of the front side of the fixed plate 510, the two movable plates 520 are rotationally and symmetrically disposed with the movable gear 511 as the center, and the movable plates 520 have a rack portion 521 extending toward the movable gear 511 and engaged with the movable gear 511. Each movable plate 520 is provided with a copper strip feeder 530,

therefore, when the resistors are conveyed to the lower die holder 300 through the resistor feeding mechanism 400, the copper strip is conveyed to the upper die holder 200 through the copper strip feeding mechanism 500, and then the copper strip is riveted and pressed on pins at two ends of the resistors through the upper die holder 200.

Two copper strips are respectively conveyed from the copper strip feeders 530 on the two movable plates 520, when the distance between the two copper strips needs to be adjusted, one movable plate 520 can be moved, the movable gear 511 drives the other movable plate 520 to move towards or away from the movable plate 520, so that the distance between the two copper strip feeders 530 is adjusted, the distance between the two copper strips is adjusted, and then the two copper strips are conveyed to the upper die base 200 to be subjected to copper strip crimping, so that the copper strip crimping die is suitable for terminal crimping of resistors with different lengths.

Compared with the prior art, the double-beating copper strip forming machine provided by the invention can realize automatic feeding of the resistor and the copper strip, and complete efficient copper strip compression joint on the terminals of pins at two ends of the resistor. And the interval between the copper strips can also be adjusted to the electron of adaptation different length carries out the terminal crimping, and application scope is extensive.

Alternatively, as shown in fig. 6 to 7, in the present embodiment, the copper tape feeder 530 includes a mounting plate 531, and a first linear module 532, a first backstop 533 and a second backstop 534 sequentially disposed on the mounting plate 531 along the advancing direction of the copper tape, wherein the first backstop 533 is disposed on the slider of the first linear module, and the copper tape sequentially passes through the first backstop 533 and the second backstop 534.

The first stopper 533 and the second stopper 534 have the same structure, and the first stopper 533 includes a fixed block 5331, a swing block 5332, and a spring 5333. The fixed block 5331 is provided with a material passing groove 5331a arranged along the advancing direction of the copper strip, a movable cavity communicated with the material passing groove 5331a is arranged above the material passing groove 5331a, the swinging block 5332 is rotatably arranged in the movable cavity through a rotating shaft, and the lower end part of the swinging block 5332 extends towards the material passing groove 5331a and is abutted to the copper strip crossing the material passing groove 5331 a. The spring 5333 is arranged at the upper part of the movable cavity, one end of the spring abuts against the fixed block 5331, and the other end abuts against one side of the swinging block 5332, which is opposite to the forward direction of the copper strip.

During feeding, the first stopping device 533 is driven by the first linear module 532 to move along the feeding direction, so that a reverse friction force for advancing the copper strip is generated between the lower end face of the swinging block 5331 and the upper surface of the copper strip, the swinging block 5332 rotates in the advancing direction of the copper strip under the action of the reverse friction force to apply pressure to the copper strip, the copper strip is clamped in the passing trough 5331a, the copper strip is driven to move together when the first stopping device 533 moves, and the swinging block of the second stopping device 534 is pushed by the copper strip to move in the advancing direction of the copper strip, so that feeding of the copper strip is completed.

When the first stopper 533 is reset in the forward direction of the reverse copper strip, the second stopper 534 clamps the copper strip in one step, so that when the first stopper 533 is reset, the first stopper 533 is prevented from clamping the copper strip, and the first stopper 533 can be reset smoothly.

This embodiment just can realize the autoloading of copper strips through adopting a sharp module and two backstops, and can prevent that the copper strips from returning, simple structure, the beneficial effect of facilitate promotion application.

Alternatively, as shown in fig. 6, in the present embodiment, a side plate (not shown) is provided at one end of the fixed plate, an adjustment rod 541 is provided on the side plate, one end of the adjustment rod 541 extends into the movable block 520 close thereto and is connected to the movable block 520 by screw engagement, and a handle 540 is provided at the other end of the adjustment rod 541. Therefore, the movable plate 520 in threaded fit connection with the adjusting rod 541 can be moved by rotating the adjusting rod 541 through the handle 540, so that the distance between the copper strip feeders 530 on the two sides can be quickly adjusted.

Alternatively, as shown in fig. 8-9, in this embodiment, the dispenser 420 includes a second linear module 421 disposed along the resistor advancing direction and a fixing seat 422 fixed on the slider of the second linear module 421, and the fixing seat 422 is provided with a rotating shaft 424 and a rotating motor 423 for driving the rotating shaft 424 to rotate. A cantilever 425 vertically connected to the rotary shaft 424 is provided, a first chucking groove 425a is provided at a free end of the cantilever 425, and a magnetic member (not shown) for attracting a resistor is provided in the first chucking groove 425.

When the ratchet 440 delivers the cut resistor, the second linear module 421 and the rotary motor 423 are simultaneously started to drive the cantilever 425 to rotate and translate toward the ratchet 440, so that the resistor on the discharge side of the ratchet 440 is attracted into the first catching groove 425a of the cantilever. The cantilever 425 is then driven to rotate toward the lower die holder 300, and the resistor is placed on the lower die holder 300. After the upper die holder 200 presses the resistor, the second linear module 421 drives the fixed seat 422 to move toward the ratchet 440, and drives the cantilever 425 to rotate toward the ratchet 440, so as to take a new material.

The cantilever 425 is used for feeding the resistor from the ratchet 440 to the lower die holder 300, and the structure is simple and convenient to implement.

Preferably, as shown in fig. 10-11, in the present embodiment, a pause wheel 460 is provided on the feeding side of the stepper 410, the pause wheel 460 is provided on the two bracket side plates 470 through a first rotating shaft 461, and the first rotating shaft 461 is in transmission connection with the power input shaft 414 through a timing belt 434. The intermittent wheel 460 is provided with a second clamping groove 460a which is uniformly distributed along the circumferential direction, and a magnetic member 4601 for adsorbing the resistor is arranged in the second clamping groove 460 a. Therefore, stepper 410 can receive both single bulk resistors and braid resistors, and feeding of compatible bulk resistors and braid resistors is achieved.

Meanwhile, the first rotating shaft 461 and the power input shaft 414 are in transmission connection through the synchronous belt 434, so that complete synchronous actions of the stepper 410, the intermittent wheel 460 and the ratchet 440 can be realized, accurate feeding can be carried out according to the stamping speed of the copper belt machine, and the production efficiency is improved.

Specifically, in the present embodiment, as shown in fig. 12 to 13, the upper die base 200 includes a die base body 210, a die base 220, two dies 221, an upper die holder 230, an upper die 231, and a lower die holder 240.

The front center of the die holder body 210 is provided with a vertically arranged center slide groove 210a, and the punch holder 220 is slidably arranged in the center slide groove 210 a. The center of the punch holder 220 is provided with a slot 220a, the upper punch holder 230 is inserted into the slot 220a and is intermittently connected with the punch holder 220 in a transmission manner, so that the upper punch holder 230 is driven to act together when the punch holder 220 moves downwards from an initial position, and when the punch holder 220 moves downwards to a specific position, the connection relationship between the upper punch holder 230 and the punch holder 220 is automatically disconnected and independently moves downwards. When the upper blade holder 230 is returned upward to a specific position, the upper blade holder 230 is reconnected to the die holder 220, and the upper blade holder 230 is returned together.

The upper cutter holder 230 has an extension 230a protruding from the insertion groove 220a at a lower end thereof, and the upper cutter 231 is detachably fixed to a front side surface of the extension 230a by two bolts.

The lower end of the punch holder 220 is concavely provided with two strip-shaped grooves 220b with downward openings and symmetrically arranged at two sides of the slot 220 a. The front side wall of the strip-shaped groove 220b is provided with a first strip-shaped hole 220c communicated with the strip-shaped groove 220b, the upper ends of the two punching knives 221 are respectively inserted into the corresponding strip-shaped groove 220b and are fixed on the punching knife holder 220 through a fastener penetrating through the first strip-shaped hole 220c, and the lower end parts of the punching knives 221 extend downwards and are inserted into the upper cutter 231.

The lower end of the die holder body 210 is provided with a connecting plate 241, and the lower cutter holder 240 is detachably fixed to the connecting plate 241 by bolts. Two axial protrusions 240a are convexly arranged on the front end face of the lower cutter seat 240, the two axial protrusions 240a are arranged in parallel at intervals, a feeding hole 240b is arranged in each axial protrusion 240a, and a copper strip penetrates into the feeding hole from the rear end of the feeding hole and penetrates out from the front end of the feeding hole 240 b.

The upper cutter 231 has a radial protrusion 231a corresponding to the two axial protrusions 240a, and when the upper cutter 231 moves downward along with the punch holder 220, the copper tape is cut off from the sliding contact surfaces of the radial protrusion 231a and the axial protrusions 240 a.

As shown in fig. 3, a driving mechanism 120 for driving the punch holder 220 to operate is provided on the die carrier 110, the driving mechanism 120 includes a second servo motor 121 and a second speed reducer 122, a driving wheel 124 is provided on an output shaft 123 of the second speed reducer 122, and an eccentric shaft 125 is provided on an outer periphery of the driving wheel 124. A guide chute (not shown) is formed in the front side of the mold frame 110, a slider 111 is disposed in the guide chute, a free end of the eccentric shaft 125 is inserted into the slider 111, and an upper end of the die cutter holder 220 is connected to the slider 111 through a connecting member. When the second servo motor 121 drives the driving wheel 124 to rotate through the second speed reducer 122, the sliding block 111 is driven to move up and down in the guide sliding groove, and then the sliding block 111 drives the punching tool holder 220 and the upper cutting tool holder 230 to move, so that the copper strips are cut off and subjected to punch forming.

When the distance between the two copper strips is changed, the fastener of the first strip-shaped hole 220c can be loosened, the punching knife 221 is detached from the punching knife seat 220, then the upper cutting knife 231 is directly detached from the extension part 230a of the upper cutting knife seat 230 on the front surface of the die holder body 210, the lower cutting knife seat 240 is detached from the die holder body 210 from the bottom of the die holder body 210, the upper cutting knife 231 and the lower cutting knife seat 240 corresponding to the distance between the copper strips are replaced, the punching knife 221 passes through the lower cutting knife seat 240 from the bottom of the lower cutting knife seat 240 and is inserted into the strip-shaped groove 240b of the punching knife seat 220, and locking and fixing are carried out again through the fastener.

Therefore, the two copper strips with the changed intervals are punched.

In the embodiment, the upper die holder 200 can punch two copper strips with the changed intervals only by replacing the upper cutter 231 and the lower cutter seat 240 corresponding to the intervals of the copper strips and correspondingly adjusting the interval between the two punching cutters 221 without replacing the whole upper die holder 200, so that the die changing efficiency is greatly improved; in addition, the position between main movable components of the upper die holder 200 cannot be changed in the die changing process, the upper die holder 200 can be put into production quickly after die changing, and the delay of die changing to production is reduced.

Preferably, as shown in fig. 12 to 13, in the present embodiment, two bottom sliding grooves 210b with downward openings and symmetrically disposed on two sides of the central sliding groove 210a are concavely disposed on the die holder body 210, a forming tool holder 250 slidably disposed is disposed in the bottom sliding groove 251, a forming tool 251 is disposed on the forming tool holder 250, a tool opening portion of the forming tool 251 penetrates through one side of the forming tool holder 250 and extends below the upper cutting tool 231, and an elastic member 252 for pressing the forming tool holder 250 is disposed on the other side of the forming tool holder 250.

Swing arm pieces 260 corresponding to the two forming tool holders 250 are arranged on two sides of the central sliding groove 210a, the upper ends of the swing arm pieces 260 are rotatably connected to the die holder body 210, U-shaped grooves 260a are formed in the lower ends of the swing arm pieces 260, cylindrical pieces 253 are arranged on the forming tool holders 250, and the U-shaped grooves 260a in the lower ends of the swing arm pieces 260 are movably clamped on the cylindrical pieces 253.

Meanwhile, two sides of the die cutter holder 220 are provided with striking blocks 221. When the punch holder 220 is located at the initial position, the elastic member 252 applies an elastic force to the forming holder 250, so that the edge portion of the forming blade 251 moves below the radial protrusion 231a of the upper blade 231. After the upper cutter holder 230 is driven by the punch holder 220 to cut the copper tape, the cut copper tape is driven by the upper cutter 231 to move towards the forming cutter 251, and is bent inwards towards the upper cutter 231 to form a U-shaped part under the obstruction of the forming cutter 251, and the U-shaped part is clamped in the upper cutter 231. Then, the upper cutter 231 continues to move towards the lower die holder 300, the collision block 221 drives the swinging arm members 260 to swing towards the two sides of the die holder body 210, and drives the forming tool holder 250 to move towards the two sides, so that the edge portion of the forming tool 251 is pulled out from the upper cutter 231, and a movable space is reserved for the upper cutter 231 to drive the U-shaped member to move towards the lower die holder 300. After the upper cutter 231 is pressed on the lower die holder 300, the die holder 220 acts alone to drive the die 221 to press the U-shaped member clamped in the upper cutter 231 onto the pins at the two ends of the resistor.

The mode is dodged in the rotation that generally adopts to current shaping sword, because the impact that goes up the cutter and get off is big, and the part of cutting off of copper strips self has certain thickness in addition, also can exert certain reaction force to the shaping sword simultaneously at bending deformation's in-process for the shaping sword can be forced to rotate in advance because of the punching press of last cutter and the deformation reaction force of copper strips, leads to the deformation of copper strips incomplete and influences subsequent riveting. In this embodiment, the forming tool apron 250 is disposed on the die holder body 210 in a horizontal sliding manner, so that the forming tool apron 250 can bear a larger stamping force in the vertical direction, bending forming of a copper strip with a thickness of 0.2mm to 3.0mm can be achieved, and the forming tool apron is wider in application range and more stable.

Alternatively, as shown in fig. 14-16, in the present embodiment, the lower die base 300 includes a bottom plate 310 and two opposite fixed lower dies 320 and movable lower dies 330. Four second bar holes 310a penetrating the bottom plate 310 are formed at both sides of the bottom plate 310, and the bottom plate 310 is fastened to the frame 100 by bolts penetrating the second bar holes 310 a. Two third bar-shaped holes 310b are formed in the mounting area of the base plate 310 in parallel, and the movable lower die 330 is fastened to the base plate 310 by bolts passing through the third bar-shaped holes 310 b.

Therefore, when the terminal crimping is required to be performed on electrons with different lengths, the bottom plate 310 and the movable lower die 330 can be moved by loosening the bolts penetrating through the second strip-shaped holes 310a and the third strip-shaped holes 310b, and the positions of the fixed lower die 320 and the movable lower die 330 are adjusted, so that the resistors with different lengths can be borne by the fixed lower die and the movable lower die, and the fixed lower die corresponds to the upper die base 200, and the crimping of the electrons with different lengths is realized.

Optionally, in this embodiment, the fixed lower die 320 includes an outer fixing seat 321, an inner fixing seat 322, and a forming die 323, the outer fixing seat 321 is fixed on the bottom plate 310, the inner fixing seat 322 is fixed on the outer fixing seat 321, the inner fixing seat 321 has a vertically arranged mounting groove (not shown), a wedge-shaped slider 324 capable of sliding along the groove bottom of the mounting groove is arranged at the groove bottom of the mounting groove, the forming die 323 is inserted into the mounting groove, and the bottom surface of the forming die 324 is in sliding fit with the top surface of the wedge-shaped slider 324.

The outer fixing seat 322 is provided with a knob 325 and a screw 326, and the screw 326 is arranged on the outer fixing seat 321 through a screw seat 3261. The knob 325 is fixed to a first end of the screw 326, and a second end thereof extends toward the wedge slider 324, is inserted into the wedge slider 324, and is connected with the wedge slider 324 by screw-fitting.

Therefore, when the punching pressures applied to the fixed lower die 320 and the movable lower die 330 are different, the punching pressure applied to the movable lower die 330 can be used as a reference force, the screw 326 is rotated through the knob 325, the wedge-shaped slider 324 is driven to move, the distance from the forming die 323 of the fixed lower die 320 to the upper die holder 200 is adjusted, the punching pressure applied to the fixed lower die 320 is adjusted, all the punching pressures applied to the fixed lower die 320 and the movable lower die 330 are consistent, and the riveting consistency of terminals at two ends of the resistor is ensured.

Alternatively, as shown in fig. 17, in another embodiment, a material roll support 600 is disposed above the copper tape feeding mechanism 500, and two copper tape rolls 610 of copper tapes are disposed on the material roll support 600, so as to directly supply the copper tapes to the copper tape feeding mechanism 500, thereby improving the supply efficiency of the copper tapes.

The above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any minor modifications, equivalents and improvements made to the above embodiment according to the technical spirit of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims

1. A double copper strip beating forming machine comprises a rack, wherein a die set is arranged on the rack, and an upper die base and a lower die base are arranged on the die set; the copper strip feeding mechanism is positioned above the resistance feeding mechanism and comprises a fixed plate fixedly arranged on the die carrier, a movable gear and two movable plates in sliding fit with the fixed plate are arranged on the fixed plate, the movable gear is positioned in the center of the front side of the fixed plate, the two movable plates are rotationally and symmetrically arranged by taking the movable gear as the center, and the movable plates are provided with rack parts which extend towards the movable gear and are meshed with the movable gear;

each movable plate is provided with a copper strip feeder.

2. The double-beating copper strip forming machine as claimed in claim 1, wherein the copper strip feeder comprises a mounting plate, and a first linear module, a first backstop and a second backstop which are sequentially arranged on the mounting plate along the copper strip advancing direction, the first backstop is arranged on a slide block of the first linear module, and the copper strip sequentially passes through the first backstop and the second backstop;

3. The double-beating copper strip forming machine as claimed in claim 1, wherein a side plate is provided at one end side of the fixed plate, an adjusting rod is provided on the side plate, one end of the adjusting rod extends into the movable block close to the adjusting rod and is connected with the movable block through screw thread fit, and a handle is provided at the other end of the adjusting rod.

4. The double-beating copper strip forming machine according to claim 1, wherein the resistance feeding mechanism comprises two oppositely arranged bracket side plates, a stepper arranged between the two bracket side plates, a material extractor arranged between the discharging sides of the two bracket side plates and the lower die base and a driver for driving the stepper to feed materials step by step;

5. The double-beating copper strip forming machine as claimed in claim 4, wherein a intermittence wheel is arranged on the feeding side of the stepper, the intermittence wheel is arranged on the two bracket side plates through a first rotating shaft, and the first rotating shaft is in transmission connection with the power input shaft through a synchronous belt;

6. The double copper strip stamping forming machine as claimed in claim 1, wherein the upper die holder comprises a die holder body, a punch holder, two punches, an upper cutter holder, an upper cutter and a lower cutter holder;

7. The double copper strip beating forming machine according to claim 6, wherein the die holder body is concavely provided with two bottom chutes with downward openings and symmetrically arranged at two sides of the central chute, a forming tool apron is arranged in the bottom chute in a sliding manner, a forming tool is arranged on the forming tool apron, a tool opening part of the forming tool penetrates out of one side of the forming tool apron and extends to the lower part of the upper cutting tool, and an elastic part for pressing the forming tool apron is arranged at the other side of the forming tool apron;

8. The double-beating copper strip forming machine as claimed in claim 1, wherein the lower die base comprises a bottom plate and two fixed lower dies and a movable lower die which are oppositely arranged;

9. The double-beating copper strip forming machine according to claim 8, wherein the fixed lower die comprises an outer fixed seat, an inner fixed seat and a forming die, the outer fixed seat is fixed on the bottom plate, the inner fixed seat is fixed on the outer fixed seat, the inner fixed seat is provided with a vertically arranged slot, a wedge-shaped sliding block capable of sliding along the slot bottom is arranged at the slot bottom of the slot, the forming die is inserted into the slot, and the bottom surface of the forming die is in sliding fit with the top surface of the wedge-shaped sliding block;

10. The double beating copper strip forming machine according to any one of claims 1 to 9, wherein a material roll support is arranged above the copper strip feeding mechanism, and the copper strip material roll is arranged on the material roll support.