CN113523390B

CN113523390B - Automatic production line is cuted to bar copper

Info

Publication number: CN113523390B
Application number: CN202110692593.2A
Authority: CN
Inventors: 胡品龙; 卞王东; 陆永伟; 陈洪; 沈玉兴; 黄艰生; 孙锡健; 蔡文明; 俞波
Original assignee: Jiangsu Huahong Technology Co Ltd
Current assignee: Jiangsu Huahong Technology Co Ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2022-07-29
Anticipated expiration: 2041-06-22
Also published as: CN113523390A

Abstract

The invention discloses an automatic production line for shearing copper bars, which comprises a plurality of groups of automatic shearing devices for the copper bars; each group of copper bar automatic shearing devices comprises a feeding traction part and a shearing part; the feeding traction part comprises a guide roller and a traction device; the shearing portion comprises a copper bar shearing machine; by optimizing the functional combination of the assembly line, the automatic production and large-scale production of copper bar shearing are realized, the labor cost is greatly reduced, and the production efficiency is improved. And the copper bar shearing machine adopts hydraulic transmission, and compared with a mechanical transmission type shearing machine, the copper bar shearing machine has the characteristics of small volume, light weight, small motion inertia, low noise, good dynamic performance and the like. The integrated control of machine, electricity and liquid is adopted, single and continuous work conversion can be realized, the starting and the stopping can be carried out at any position, and the overload protection is easy to realize.

Description

Automatic production line is cuted to bar copper

Technical Field

The invention belongs to the field of processing equipment, and particularly relates to an automatic copper bar shearing production line.

Background

The copper bar shear is a device for shearing phosphorus copper bars into particles to form qualified electroplating phosphorus copper anode materials. The bar copper on the market is cut at present, adopts mechanical scissors more, and equipment takes up an area of great, has potential safety hazard, noise height, degree of automation low, is unfavorable for large-scale production.

Disclosure of Invention

The invention aims to provide an automatic production line for shearing copper bars, which solves at least one technical problem.

The technical scheme of the invention is as follows: an automatic production line for shearing copper bars comprises 1 or more groups of automatic shearing devices for the copper bars; each group of copper bar automatic shearing devices comprises a feeding traction part and a shearing part;

the feeding traction part comprises a guide roller and a traction device;

the shearing portion comprises a copper bar shear.

Furthermore, the traction device comprises a traction wheel, an upper box body, a lower box body, a connecting plate, a jacking device and an adjusting device;

the lower box body is in a concave shape, and two sides of the connecting plate are fixedly arranged on two sides of the top of the concave lower box body respectively;

the upper box body is placed in a groove above the concave-shaped lower box body, the adjusting device is fixedly arranged on the upper box body, and the adjusting device can drive the upper box body to move up and down;

the jacking device is arranged on the connecting plate and can jack and fix the upper box body and limit the maximum height which can be lifted by the upper box body;

the traction wheels are arranged on the upper box body and the lower box body respectively and can straighten the copper bars.

The following method can be specifically adopted: the number of the traction wheels is 5, 2 traction wheels are fixed on the upper box body, and 3 traction wheels are fixed on the lower box body; the copper bar traction inlet end is taken as the left side, and the central point of the traction wheel on the upper left side of the upper box body and the central point of the traction wheel on the upper left side of the lower box body are positioned on the same vertical line, so that the copper bar can be pulled into the traction device after the traction wheel on the upper left side of the upper box body and the traction wheel on the upper left side of the lower box body reversely and synchronously rotate; go up the traction wheel central point on right side on the box and be located: and the central point of the traction wheel in the middle of the upper box body is connected with the central point of the traction wheel on the right side of the lower box body on the central axis of the connecting line, so that the traction wheel on the right side of the upper box body and the traction wheel on the middle and the right side of the lower box body rotate reversely and synchronously and then the copper bar can be straightened.

Two traction wheels are used for traction, and three traction wheels are used for straightening. The flatness and the stability of the copper bar after feeding are ensured.

Furthermore, the top of the upper box body is fixed on the connecting plate through an adjusting device, and the adjusting device can be adjusted up and down and drives the upper box body to move up and down;

the adjusting device comprises a connecting shaft, a compression spring, a gasket and a locking nut;

one end of the connecting shaft penetrates through the connecting plate to be fixedly connected with the top of the upper box body, and the other end of the connecting shaft is provided with an external thread;

the compression spring is sleeved on the connecting shaft above the connecting plate, and the bottom of the compression spring is in contact with the connecting plate;

the gasket is sleeved on the connecting shaft above the compression spring, and the bottom of the gasket is contacted with the compression spring;

the locking nut is locked and fixed on the external thread at the other end of the connecting shaft, and the compression spring is compressed and fixed between the gasket and the connecting plate;

the jacking device comprises a threaded rod, a fixed block and a rotary handle; the fixed block is fixed on the connecting plate, and threaded through hole and extending to the connecting plate lower surface are seted up to fixed block center top-down, the threaded rod rotates and down from the screw hole, and the threaded rod bottom withstands upper box body top surface, rotatory handle sets up in the threaded rod top, tightly adjusts the maximum height that upper box body can lift up through adjusting rotatory threaded rod top from top to bottom.

Furthermore, the plurality of traction wheels are in transmission connection through a gear chain.

The following method can be specifically adopted: the lower box body is sequentially provided with 3 driven gears which are respectively connected with the lower box body through one-to-one pairing of 3 traction wheels, and the driven gears are respectively: a first driven gear, a third driven gear and a fourth driven gear; the first driven gear is connected with the third driven gear through a second driven gear, the third driven gear is connected with the fourth driven gear through a driving gear, the driving gear is connected with a servo motor through a speed reducer, and the driving gear and the driven gear are driven to rotate through the rotation of the servo motor;

the third driven gear is provided with a synchronous chain wheel, the second driven gear is provided with a follow-up chain wheel, the upper box body is provided with 2 driven chain wheels which are respectively connected with the 2 traction wheels on the upper box body in a one-to-one matching mode, and the chain is connected in series on the synchronous chain wheel, the follow-up chain wheel and the driven chain wheel and rotates along with the rotation of the servo motor.

Furthermore, a tensioning chain wheel is arranged on the chain, the tensioning chain wheel is fixed at the bottom end of the guide shaft, a balancing weight is arranged at the top end of the guide shaft, and the weight of the balancing weight is smaller than the spring force of the compression spring. The upper box body can be lifted up by the adjusting device through the force provided by the upper compression spring, and the tensioning chain wheel can be lifted up together under the action of the tension of the chain because the balance weight on the tensioning chain wheel is smaller than the spring force. After the copper bar is manually introduced into the traction device, the copper bar is tightly jacked against the jacking device, the upper box body falls, and the tensioning chain wheel falls to tension the chain.

Furthermore, the guide shaft is arranged in a limiting pipe in the upper box body and moves up and down along the limiting pipe. The verticality of the up-and-down movement of the guide shaft is ensured.

Further, the copper bar shearing machine comprises a shearing rack, a shearing oil cylinder, a fixed cutter, a movable cutter and a lower cutter seat;

the shearing oil cylinder is fixed on the shearing frame, a piston rod of the shearing oil cylinder faces downwards vertically, and the movable knife is arranged on the piston rod of the shearing oil cylinder;

the fixed cutter is fixed on the lower cutter seat, the lower cutter seat is fixed on the working platform, and a piston rod of the shearing oil cylinder drives the movable cutter to move up and down to shear the copper bar in a matching manner with the fixed cutter.

Furthermore, the movable cutters are vertically arranged strip-shaped blocks, 2 movable cutters are arranged on the left side and the right side of the shearing oil cylinder respectively, the left movable cutter is arranged on the left side, the right movable cutter is arranged on the right side, and the thickness value of the movable cutters along the left and right directions is equal to the length of the section to be cut of the copper bar; an arc-shaped groove is sunken at the bottom of the movable cutter, and the inner surface of the arc-shaped groove is a contact surface with the copper bar when the copper bar is cut off; the contact surface between the movable cutter and the copper bar when the movable cutter cuts the copper bar is increased, so that the uniform stress of the copper bar is ensured.

The fixed cutter is in a block shape, 2 fixed cutters are arranged, one left fixed cutter and one right fixed cutter are fixed on the lower cutter holder, a through hole capable of penetrating through the copper bar is formed in the block-shaped fixed cutter from left to right along the direction of a central line, and the thickness value of the fixed cutter along the left and right direction is equal to the length of a section to be cut of the copper bar;

The lower cutter holder is sequentially provided with a left fixed cutter fixing position, a left movable cutter sliding groove, a right fixed cutter fixing position and a right movable cutter sliding groove from left to right, the left fixed cutter is fixedly arranged in the left fixed cutter fixing position, the right fixed cutter is fixedly arranged in the right fixed cutter fixing position, the left movable cutter is positioned right above the left movable cutter sliding groove, and the right movable cutter is positioned right above the right movable cutter sliding groove; the lower tool rest bottom plate at the bottom of the left moving knife chute and the right moving knife chute and the corresponding through of the working platform are provided with blanking ports. The copper bar is fed from the left side and stops at the right side of the right moving knife. The back cavity of the shearing oil cylinder is filled with oil, and the piston rod pushes the moving knife downwards to shear the copper bar into three sections. Wherein two sections above the blanking port directly fall down, and when a section on the right fixed cutter is used for secondary feeding of the copper rod, the section is pushed into the blanking port on the right side.

Furthermore, the shearing oil cylinder is a single-action plunger oil cylinder, and the two copper bar shearing machines are connected and interacted through a group of link mechanisms;

link mechanism includes the connecting rod seat, connecting rod and 2 pin, the connecting rod seat sets up in the middle of two bar copper shears, but connecting rod center rotary type is fixed in on the connecting rod seat, 2 pin are fixed in respectively on the piston rod of the shearing hydro-cylinder of two bar copper shears, the connecting rod both ends extend to 2 pin below respectively, and after connecting rod one end was pushed down by the pin on the piston rod of the shearing hydro-cylinder of a bar copper shear, the connecting rod other end perk drives the shearing hydro-cylinder return stroke of the bar copper shear that the other end corresponds simultaneously. When the shearing of the copper rod shearing machine at one end is finished, the copper rod shearing machine at the other end returns to the place, and the feeding and shearing of the copper rod shearing machine at the other end can be carried out.

Furthermore, a discharging chute is correspondingly arranged below the copper rod shearing machine, the discharging chute is arranged in an inclined mode, and a finished product collecting box is arranged at an inclined outlet. The sheared copper rod falls into the discharging chute from the discharging opening and slides into the finished product collecting box along the inclined plate of the discharging chute.

The beneficial effects of the invention are: by optimizing the functional combination of the assembly line, the automatic production and large-scale production of copper bar shearing are realized, the labor cost is greatly reduced, and the production efficiency is improved. And the copper bar shearing machine adopts hydraulic transmission, and compared with a mechanical transmission type shearing machine, the copper bar shearing machine has the characteristics of small volume, light weight, small motion inertia, low noise, good dynamic performance and the like. The integrated control of machine, electricity and liquid is adopted, single and continuous work conversion can be realized, the starting and the stopping can be carried out at any position, and the overload protection is easy to realize.

According to the implementation and the test of the technical scheme, the invention has reasonable structure and convenient operation. The predetermined target is preferably achieved.

Drawings

FIG. 1 is a top view of an automatic production line for shearing copper bars according to the present invention;

FIG. 2 is a front view of an automatic copper bar shearing production line according to the present invention;

FIG. 3 is a schematic view of a cutout portion of the present invention;

FIG. 4 is a front view of the draft gear of the present invention;

FIG. 5 is a rear elevational view of the draft gear of the present invention;

FIG. 6 is a right side elevation view of the draft gear of the present invention;

FIG. 7 is a first view of the shearing machine for copper rods according to the present invention;

FIG. 8 is a second view of the shearing machine for copper rods according to the present invention;

FIG. 9(a) is a front view of the moving blade of the present invention;

FIG. 9(b) is a side view of the moving blade of the present invention;

FIG. 10(a) is a front view of a stationary knife according to the present invention;

FIG. 10(b) is a top view of the stationary blade of the present invention;

FIG. 11(a) is a front view of a lower tool holder according to the present invention;

FIG. 11(b) is a cross-sectional view of the lower blade holder of the present invention.

In the figure, 1-turntable, 2-guide roller, 3-traction device, 4-copper bar shearing machine, 5-connecting rod, 6-discharging chute, 7-finished product collecting box, 8-traction wheel, 9-jacking device, 10-adjusting device, 11-copper bar, 12-driving gear, 13-first driven gear, 14-second driven gear, 15-third driven gear, 16-driven sprocket, 17-tensioning sprocket, 18-chain, 19-lower box, 20-upper box, 21-counterweight, 22-shearing frame, 23-shearing oil cylinder, 24-moving blade, 25-stop lever, 26-fixed blade, 27-lower blade seat, 28-connecting plate, 29-synchronous sprocket, 30-follow-up sprocket, 31-a guide shaft, 32-a limiting pipe, 33-a working platform, 34-a blanking port, 35-a fourth driven gear, 91-a threaded rod, 92-a fixed block, 93-a rotating handle, 101-a connecting shaft, 102-a compression spring, 103-a gasket, 104-a locking nut, 241-an arc groove, 261-a through hole, 271-a left side fixed cutter fixing position, 272-a left side movable cutter sliding groove, 273-a right side fixed cutter fixing position and 274-a right side movable cutter sliding groove.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1-3, an automatic copper bar shearing production line comprises 8 groups of automatic copper bar shearing devices. Each group of copper bar automatic shearing devices comprises a feeding traction part and a shearing part. The feeding traction part comprises a turntable 1, a guide roller 2 and a traction device 3. The shearing part comprises a copper bar shearing machine 4, a connecting rod mechanism and a discharging chute 6. A discharging chute 6 is correspondingly arranged below the copper rod shearing machine 4, the discharging chute 6 is obliquely arranged, and a finished product collecting box 7 is arranged at an oblique outlet. When the copper bar coiling machine works, firstly, a copper bar coiling block is placed on the rotary table 1, a copper bar head is manually fed into the traction device 3, and the equipment is started. The traction device 3 drives the copper rod to advance to the copper rod shearing machine 4, the copper rod shearing machine 4 starts to shear the copper rod, and finished copper rod particles are conveyed into a finished product collecting box 7 through a discharging chute 6 below the copper rod shearing machine 4.

As shown in fig. 4-6, the traction device 3 comprises a traction wheel 8, an upper box 20, a lower box 19, a connecting plate 28, a jacking device 9 and an adjusting device 10.

The lower box body 19 is in a concave shape, and two sides of the connecting plate 28 are respectively and fixedly arranged on two sides of the top of the concave lower box body 19.

The upper box body 20 is placed in a groove above the concave-shaped lower box body 19, the top of the upper box body 20 is fixed on a connecting plate 28 through 2 groups of adjusting devices 10, and the adjusting devices 10 can be adjusted up and down and drive the upper box body 20 to move up and down. The adjusting device 10 includes a connecting shaft 101, a compression spring 102, a washer 103, and a lock nut 104. One end of the connecting shaft 101 penetrates through the connecting plate 28 to be fixedly connected with the top of the upper box body 20, and the other end of the connecting shaft is provided with an external thread. The compression spring 102 is sleeved on the connecting shaft 101 above the connecting plate 28, and the bottom of the compression spring 102 is in contact with the connecting plate 28. The spacer 103 is sleeved on the connecting shaft 101 above the compression spring 102, and the bottom of the spacer 103 is in contact with the compression spring 102. A lock nut 104 is fastened to the external thread on the other end of the connecting shaft 101 to compress and fix the compression spring 102 between the spacer 103 and the connecting plate 28.

The jacking devices 9 are provided with 2 groups, are arranged on the connecting plate 28 and can jack and fix the upper box body and limit the maximum height which can be lifted by the upper box body. The tightening device 9 comprises a threaded rod 91, a fixed block 92 and a rotating handle 93. The fixed block 92 is fixed on the connecting plate 28, a threaded through hole is formed in the center of the fixed block from top to bottom and extends to the lower surface of the connecting plate, the threaded rod 91 rotates in the threaded hole, the bottom end of the threaded rod 91 abuts against the top surface of the upper box body 20, the rotating handle 93 is arranged on the top end of the threaded rod 91, and the maximum height of the upper box body 20 capable of being lifted can be adjusted by adjusting the rotating threaded rod 91 up and down.

The traction wheel 8 has 5, 2 are fixed on

upper box

20, and 3 are fixed on lower box 19. The traction inlet end of the copper rod 11 is the left side, and the central point of the traction wheel on the left side of the upper box body 20 and the central point of the traction wheel on the left side of the lower box body 19 are positioned on the same vertical line, so that the copper rod 11 can be dragged into the traction device 3 after the traction wheel on the left side of the upper box body 20 and the traction wheel on the left side of the lower box body 19 rotate reversely and synchronously. The central point of the traction wheel on the right side of the upper box body 20 is positioned as follows: the central point of the traction wheel in the middle of the upper box body 19 is connected with the central point of the traction wheel on the right side of the lower box body 19 on the central axis of the connecting line, so that the traction wheel on the right side of the upper box body 20 and the traction wheel on the middle and the right side of the lower box body 19 rotate reversely and synchronously and then the copper rod 11 can be straightened.

Lower 19 last order of box be provided with 3 respectively with lower 19 last 3 traction wheels of box one-to-one driven gear who pairs the connection, be respectively: a first driven gear 13, a third driven gear 15 and a fourth driven gear 35. First driven gear 13 and third driven gear 15 link up through second driven gear 14 between, link up through driving gear 12 between third driven gear 15 and the fourth driven gear 35, and driving gear 12 passes through the speed reducer and is connected with servo motor, rotates through servo motor and drives driving gear and driven gear and rotate.

A synchronous chain wheel 29 is arranged on the third driven gear 15, a follow-up chain wheel 30 is arranged on the second driven

gear

14, 2 driven chain wheels 16 which are respectively connected with 2 traction wheels on the upper box 20 in a one-to-one matching mode are arranged on the upper box 20, and the chain 18 is connected on the synchronous chain wheel 29, the follow-up chain wheel 30 and the driven chain wheel 16 in series and rotates along with the rotation of the servo motor.

The chain 18 is provided with a tension sprocket 17, the tension sprocket 17 is fixed at the bottom end of a guide shaft 31, the top end of the guide shaft 31 is provided with a balancing weight 21, and the guide shaft 31 is arranged in a limiting pipe 32 in the upper box body 20 and moves up and down along the limiting pipe 32. The weight of the weight 21 is less than the spring force of the compression spring 102. The upper box body can be lifted up by the adjusting device through the force provided by the upper compression spring, and the tensioning chain wheel can be lifted up together under the action of the tension of the chain because the balance weight on the tensioning chain wheel is smaller than the spring force. After the copper bar is manually introduced into the traction device, the copper bar tightly pushes the jacking device, the upper box body falls, and the tensioning chain wheel falls to tension the chain.

As shown in fig. 8, the bar copper shearing machine 4 includes a shearing frame 22, a shearing cylinder 23, a fixed blade 26, a movable blade 24 and a lower blade holder 27. The shearing oil cylinder 23 is fixed on the shearing frame 22, a piston rod of the shearing oil cylinder 23 is vertically downward, and the movable knife 24 is installed on the piston rod of the shearing oil cylinder 23. The fixed cutter 26 is fixed on the lower cutter seat 27, the lower cutter seat 27 is fixed on the working platform 33, and the piston rod of the shearing oil cylinder 23 drives the movable cutter 24 to move up and down to be matched with the fixed cutter 26 to shear the copper bar 11.

As shown in fig. 7, the shearing cylinder 23 is a single-acting plunger cylinder, and the two copper bar shearing machines 4 are connected and interacted through a set of link mechanisms. The connecting rod mechanism comprises a connecting rod seat, a connecting

rod

5 and 2 stop rods 25, the connecting rod seat is arranged between the two copper bar shearing machines 4, the center of the connecting rod 5 is rotatably fixed on the connecting rod seat, the 2 stop rods 25 are respectively fixed on the piston rods of the shearing oil cylinders 23 of the two copper bar shearing machines 4, two ends of the connecting rod 5 respectively extend to the lower parts of the 2 stop rods 25, and after one end of the connecting rod 5 is pressed down by the stop rod 25 on the piston rod of the shearing oil cylinder 23 of one copper bar shearing machine 4, the other end of the connecting rod 5 tilts and simultaneously drives the shearing oil cylinder return stroke of the copper bar shearing machine 4 corresponding to the other end. When the shearing of the copper rod shearing machine at one end is finished, the copper rod shearing machine at the other end returns to the place, and the feeding and shearing of the copper rod shearing machine at the other end can be carried out.

As shown in fig. 9, the movable knife 24 is a vertically placed bar-shaped block, and has 2 handles, which are respectively installed on the left and right sides of the shearing cylinder 23, the left side is a left movable knife, the right side is a right movable knife, and the thickness value of the movable knife 24 in the left-right direction is equal to the length of the section of the copper bar to be cut. An arc-shaped groove 241 is sunken at the bottom of the movable knife 24, and the inner surface of the arc-shaped groove 241 is a contact surface with the copper bar when the copper bar is cut off. The contact surface between the movable cutter and the copper bar when the movable cutter cuts the copper bar is increased, so that the uniform stress of the copper bar is ensured.

As shown in fig. 10, the fixed blade 26 is a block, and has 2 handles, one handle is fixed on the lower blade holder 27, a through hole 261 capable of passing through the copper bar 11 is opened on the block fixed blade 26 from left to right along the central line direction, and the thickness value of the fixed blade 26 along the left and right direction is equal to the length of the section to be cut of the copper bar.

As shown in fig. 11, the lower blade holder 27 is sequentially provided with a left stationary blade fixing position 271, a left moving blade sliding groove 272, a right stationary blade fixing position 273, a right moving blade sliding groove 274, a left stationary blade is fixedly arranged in the left stationary blade fixing position 271, a right stationary blade is fixedly arranged in the right stationary blade fixing position 273, a left moving blade is positioned right above the left moving blade sliding groove 272, and a right moving blade is positioned right above the right moving blade sliding groove 274. The bottom plate of the lower tool rest 27 at the bottoms of the left moving blade sliding groove 272 and the right moving blade sliding groove 274 and the working platform 33 are correspondingly provided with a blanking port 34 in a penetrating way. The copper bar is fed from the left side and stops at the right side of the right moving knife. The back cavity of the shearing oil cylinder is filled with oil, and the piston rod pushes the moving knife downwards to shear the copper bar into three sections. Wherein two sections above the blanking port directly fall down, and when a section on the right fixed cutter is used for secondary feeding of the copper rod, the section is pushed into the blanking port on the right side.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an automatic production line is cuted to bar copper which characterized in that: comprises 1 or more groups of automatic copper bar shearing devices; each group of automatic copper bar shearing devices comprises a feeding traction part and a shearing part;

the feeding traction part comprises a guide roller (2) and a traction device (3);

the shearing portion comprises a copper bar shear (4);

the traction device (3) comprises a traction wheel (8), an upper box body (20), a lower box body (19), a connecting plate (28), a jacking device (9) and an adjusting device (10);

the lower box body (19) is concave, and two sides of the connecting plate (28) are fixedly arranged on two sides of the top of the concave lower box body (19) respectively;

the upper box body (20) is placed in a groove above the concave-shaped lower box body (19), the adjusting device (10) is fixedly arranged on the upper box body (20), and the adjusting device (10) can drive the upper box body (20) to move up and down;

the jacking device (9) is arranged on the connecting plate (28) and can jack and fix the upper box body and limit the maximum height of the upper box body which can be lifted;

the traction wheels (8) are arranged on the upper box body (20) and the lower box body (19) respectively and can straighten the copper bars (11).

2. The automatic production line for shearing copper bars as claimed in claim 1, is characterized in that: the top of the upper box body (20) is fixed on a connecting plate (28) through an adjusting device (10), and the adjusting device (10) can be adjusted up and down and drives the upper box body (20) to move up and down;

The adjusting device (10) comprises a connecting shaft (101), a compression spring (102), a gasket (103) and a locking nut (104);

one end of the connecting shaft (101) penetrates through the connecting plate (28) to be fixedly connected with the top of the upper box body (20), and the other end of the connecting shaft is provided with an external thread;

the compression spring (102) is sleeved on the connecting shaft (101) above the connecting plate (28), and the bottom of the compression spring (102) is in contact with the connecting plate (28);

the gasket (103) is sleeved on the connecting shaft (101) above the compression spring (102), and the bottom of the gasket (103) is in contact with the compression spring (102);

the locking nut (104) is locked and fixed on the external thread at the other end of the connecting shaft (101), and the compression spring (102) is compressed and fixed between the gasket (103) and the connecting plate (28).

3. The automatic production line for shearing copper bars as claimed in claim 1, is characterized in that: the jacking device (9) comprises a threaded rod (91), a fixed block (92) and a rotary handle (93); the fixing block (92) is fixed on the connecting plate (28), a threaded through hole is formed in the center of the fixing block from top to bottom and extends to the lower surface of the connecting plate, the threaded rod (91) rotates downwards from the threaded hole, the bottom end of the threaded rod (91) abuts against the top surface of the upper box body (20), the rotating handle (93) is arranged at the top end of the threaded rod (91), and the maximum height which can be lifted by the upper box body (20) can be adjusted by adjusting the rotating threaded rod (91) up and down.

4. The automatic production line for shearing copper bars as claimed in claim 1, characterized in that: and the traction wheels are in transmission connection through a gear chain.

5. The automatic production line for shearing copper bars as claimed in claim 2, characterized in that: a tensioning chain wheel (17) is arranged on the chain (18), the tensioning chain wheel (17) is fixed to the bottom end of the guide shaft (31), a balancing weight (21) is arranged at the top end of the guide shaft (31), and the weight of the balancing weight (21) is smaller than the spring force of the compression spring (102).

6. The automatic production line for shearing copper bars as claimed in claim 5, is characterized in that: the guide shaft (31) is arranged in a limiting pipe (32) in the upper box body (20) and moves up and down along the limiting pipe (32).

7. The automatic production line for shearing copper bars as claimed in claim 1, is characterized in that: the copper bar shearing machine (4) comprises a shearing rack (22), a shearing oil cylinder (23), a fixed cutter (26), a movable cutter (24) and a lower cutter seat (27);

the shearing oil cylinder (23) is fixed on the shearing frame (22), a piston rod of the shearing oil cylinder (23) is vertically downward, and the movable knife (24) is installed on the piston rod of the shearing oil cylinder (23);

the fixed cutter (26) is fixed on the lower cutter holder (27), the lower cutter holder (27) is fixed on the working platform (33), and a piston rod of the shearing oil cylinder (23) drives the movable cutter (24) to move up and down to be matched with the fixed cutter (26) to shear the copper bar (11).

8. The automatic production line for shearing copper bars as claimed in claim 7 is characterized in that: the shearing oil cylinder (23) is a single-action plunger oil cylinder, and the two copper bar shearing machines (4) are connected and interacted through a group of link mechanisms;

link mechanism includes the connecting rod seat, connecting rod (5) and 2 pin (25), the connecting rod seat sets up in the middle of two bar copper shears (4), but connecting rod (5) center rotary type is fixed in on the connecting rod seat, 2 pin (25) are fixed in respectively on the piston rod of shearing hydro-cylinder (23) of two bar copper shears (4), connecting rod (5) both ends extend to 2 pin (25) below respectively, and after pin (25) on the piston rod of shearing hydro-cylinder (23) of connecting rod (5) one end by a bar copper shears (4) pushed down, connecting rod (5) other end perk drives the shearing return stroke hydro-cylinder of bar copper shears (4) that the other end corresponds simultaneously.

9. The automatic production line for shearing copper bars as claimed in claim 1, is characterized in that: the discharging chute (6) is correspondingly arranged below the copper rod shearing machine (4), the discharging chute (6) is obliquely arranged, and a finished product collecting box (7) is arranged at an oblique outlet.