A staple forming machine

Abstract

The application relates to a U-shaped nail forming machine, and relates to the technical field of U-shaped nail production. The machine tool is slidably connected with a pressing block above the machine tool. A conveying mechanism, a die cutting mechanism and a stamping mechanism are arranged between the pressing block and the machine tool. A driving mechanism for driving the pressing block to move up and down is arranged above the pressing block. The driving mechanism comprises a hydraulic cylinder arranged above the pressing block, and an eccentric driving assembly is arranged at the end of the hydraulic cylinder away from the pressing block. The stamping mechanism comprises a punch arranged on the pressing block and a detachable plastic forming piece arranged on the machine tool. The punch and the plastic forming piece are oppositely arranged. The conveying mechanism comprises a clamping and pushing assembly for conveying a wire plate to the die cutting mechanism and an intermittent pushing assembly for conveying the wire plate between the die cutting mechanism and the stamping mechanism. The application has the effects of conveniently replacing the plastic forming piece, improving the replacement efficiency and improving the U-shaped nail production efficiency.

Description

TECHNICAL FIELD

[0001] The application relates to the field of U-shaped nail production, in particular to a U-shaped nail forming machine. BACKGROUND

[0002] The U-shaped nail is a common connecting piece, which is processed by a punch, and is divided into various specifications according to the length of the nail leg, the width of the nail and the thickness of the nail wire, and is applied in different scenes according to the performance of the U-shaped nail. The material of the U-shaped nail includes cold-drawn wire, galvanized wire, galvanized steel wire and stainless steel wire.

[0003] The design principle of the punch is to convert the circular motion into linear motion, the main motor drives the flywheel, and the flywheel drives the gear, crankshaft, connecting rod and the like to rotate, so as to realize the linear motion of the slide block. The punch also has a stamping table, and the slide block applies pressure to the material on the stamping table to make it plastic deformation, so as to obtain the required shape and precision. The U-shaped nail is thus stamped and formed.

[0004] According to the related technology in the above, the slide block reciprocates linearly under the action of the eccentric vibration of the crankshaft, and the stamping process time is short and the response is fast, so the stroke of the slide block is relatively small, so as to meet the effect that the stamping speed matches the conveying speed. However, when producing U-shaped nails of different specifications, different stamping tables need to be replaced. However, the stroke of the slide block is short, and the slide block cannot move away from the stamping table, so the disassembly and assembly of the stamping table are hindered, and the work efficiency is affected. SUMMARY

[0005] The purpose of the application is to provide a U-shaped nail forming machine.

[0006] The U-shaped nail forming machine provided by the application adopts the following technical scheme:

[0007] A U-shaped nail forming machine, comprising a machine tool, a pressing block is slidably connected above the machine tool, a conveying mechanism, a die cutting mechanism and a stamping mechanism are arranged between the pressing block and the machine tool, a driving mechanism for driving the pressing block to move up and down is arranged above the pressing block, the driving mechanism comprises a hydraulic cylinder arranged above the pressing block, and an eccentric driving assembly is arranged at the end of the hydraulic cylinder away from the pressing block.

[0008] The stamping mechanism comprises a punch block arranged on the pressing block and a detachable plastic part arranged on the machine tool, and the punch block and the plastic part are arranged oppositely.

[0009] The conveying mechanism comprises a clamping and pushing assembly for conveying the wire plate to the die cutting mechanism and an intermittent pushing assembly for conveying the wire plate between the die cutting mechanism and the stamping mechanism.

[0010] By adopting the technical scheme, the pressing block is reciprocated up and down in a small stroke range by the eccentric driving assembly, when the pressing block moves up, the clamping and pushing assembly pushes the wire plate to the shearing die mechanism, and the intermittent pushing assembly pushes the sheared wire plate to the stamping mechanism at the same time, when the pressing block moves down, the pressing block drives the shearing die mechanism to quickly shear the wire plate, and drives the punch to stamp the sheared wire plate into the molded part on the molding table, so that the shearing die and stamping work are quickly completed, the hydraulic cylinder can drive the pressing block to move in a large stroke range, the molded part is conveniently replaced, the replacement efficiency is improved, and the U-shaped nail production efficiency is improved.

[0011] Optionally, the eccentric driving assembly comprises a rotating shaft connected with the machine tool, an eccentric shaft parallel to the rotating shaft is arranged on the rotating shaft, an axis of the eccentric shaft deviates from an axis of the rotating shaft, an outer sleeve is arranged outside the eccentric shaft, an outer diameter of the outer sleeve is larger than an outer diameter of the rotating shaft, the outer sleeve is located at an end of the hydraulic cylinder away from the pressing block, a side wall of the outer sleeve abuts against an end of the hydraulic cylinder, and a drive for driving the pressing block to move towards the rotating shaft is arranged above the pressing block.

[0012] By adopting the technical scheme, the rotating shaft drives the eccentric shaft to rotate, so that the outer sleeve rotates with the eccentric shaft, in this process, the drive applies a force to the pressing block towards the rotating shaft, so that the end of the hydraulic cylinder always abuts against the outer sleeve, therefore, when the outer sleeve moves eccentrically relative to the rotating shaft, the pressing block is quickly reciprocated in the vertical direction in a small stroke range, so that the shearing die and stamping work efficiency is improved.

[0013] Optionally, the drive is a drive spring in a stretched state, one end of the drive spring is fixedly connected with an upper end of the machine tool, and the other end is fixedly connected with the pressing block.

[0014] By adopting the technical scheme, the drive spring enables the pressing block to quickly respond to the reciprocating motion of the eccentric vibration assembly, and improves the stability and sensitivity of the movement of the pressing block.

[0015] Optionally, the clamping and pushing assembly comprises a feeding roller rotatably and slidably connected with the machine tool, a sliding direction of the feeding roller is towards the shearing die mechanism, a push plate is arranged on a side of the lower end of the feeding roller close to the shearing die mechanism, and an end of the push plate away from the feeding roller abuts against the wire plate on the machine tool.

[0016] By adopting the above technical scheme, when the moving direction of the feeding roller is towards the side where the push plate is located, the side of the push plate away from the feeding roller abuts against the wire plate, the feeding roller has a tendency of relative rotation with the feeding roller under the obstruction of the push plate, and the pressure of the push plate on the wire plate gradually increases, so that the friction between the push plate and the wire plate is enhanced, the push plate drives the wire plate to move synchronously through the friction, when the feeding roller moves reversely, the moving direction of the feeding roller is away from the side where the push plate is located, so that the push plate is subjected to the resistance applied by the wire plate, that is, the force opposite to the moving direction of the feeding roller, so that the push plate and the feeding roller have a tendency of rotating towards the side away from the wire plate, so that the friction between the push plate and the wire plate is insufficient to drive the wire plate to retreat synchronously with the moving block, so that the wire plate moves in a reciprocating intermittent mode, the friction between the push plate and the wire plate hinders the inertial movement of the wire plate, so that the precision of the movement of the wire plate is improved, the processing requirements of different processes are met, and the production efficiency and product quality of products are improved.

[0017] Optionally, the intermittent pushing assembly is located on the side of the shearing die mechanism away from the clamping and pushing assembly, the intermittent pushing assembly comprises a pressing plate slidingly connected to the machine tool, the moving direction of the pressing plate is parallel to the feeding roller and towards the stamping mechanism, the lower end surface of the pressing plate is higher than the upper end surface of the wire plate, a push block is arranged below the pressing plate, and the push block abuts against the side wall of the wire plate.

[0018] By adopting the above technical scheme, when the wire plate is conveyed between the pressing plate and the machine tool, the pressing plate limits the shape of the wire plate, so that the wire plate remains flat and the warping is reduced, then the pressing plate is driven to move towards the stamping mechanism, at this time, the push block pushes the side wall of the wire plate and drives the wire plate to move to the stamping mechanism, and at the same time, the U-shaped nail punched in the stamping mechanism is pushed out, after the wire plate is aligned with the stamping mechanism, the pressing plate retreats to the original position and waits for the arrival of the next wire plate, so that the precision and efficiency of the wire plate conveying are improved.

[0019] Optionally, the shearing die mechanism comprises an upper cutter arranged on the lower end surface of the pressing block and a lower cutter arranged on the machine tool, the upper cutter and the lower cutter are oppositely arranged and located between the clamping and pushing assembly and the intermittent pushing assembly.

[0020] By adopting the above technical scheme, the cut wire plate is directly pushed to the stamping mechanism by the intermittent pushing assembly, so that the high-precision conveying of the wire plate between the shearing die mechanism and the stamping mechanism is realized, and the product quality of the U-shaped nail is improved.

[0021] Optionally, the plastic member comprises a plastic table arranged on the machine tool, the upper end surface of the plastic table is provided with a stamping groove, the upper end surface of the plastic table is also provided with limiting grooves located on the two sides of the stamping groove, the limiting grooves are communicated with the stamping groove, and a limiting block for limiting the width of the U-shaped nail is arranged in the limiting groove, and a rebound assembly is arranged in the stamping groove.

[0022] By adopting the technical scheme, the distance between the two limiting blocks can be adjusted by replacing the specifications of the limiting blocks, when the punch block is punching the wire plate between the two limiting blocks, the width of the U-shaped nail, i.e. the distance between the two limiting blocks, is controlled, thereby the width of the U-shaped nail is controlled, and the U-shaped nail production process can be quickly replaced, and the effect of producing different specifications of U-shaped nails is achieved.

[0023] Optionally, the rebound assembly comprises a top block slidingly connected in the punching groove, and a rebound spring is arranged between the top block and the groove bottom of the punching groove.

[0024] By adopting the technical scheme, after the U-shaped nail is punched and formed in the punching groove, the rebound spring pushes the top block to move upward, thereby automatically pushing the U-shaped nail out of the punching groove, the U-shaped nail is quickly produced, and the production efficiency is improved.

[0025] In summary, the present application has at least one of the following beneficial technical effects:

[0026] 1. The driving mechanism is switched between large stroke and small stroke by the cooperation of the hydraulic cylinder and the eccentric driving assembly, so that the U-shaped nail forming machine can quickly reciprocate cutting and punching when working, and the plastic part is convenient to replace when stopping working, and the maintenance or replacement efficiency is improved.

[0027] 2. The clamping and pushing assembly and the intermittent pushing assembly improve the precision of the wire plate movement, thereby improving the product quality of the U-shaped nail. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0029] Figure 2 is a schematic diagram of the structure of the driving mechanism in the embodiment of the present application;

[0030] Figure 3 is a schematic diagram of the structure of the clamping and feeding assembly in the embodiment of the present application;

[0031] Figure 4 is a schematic diagram of the structure of the connection between the feeding roller and the push plate in the embodiment of the present application;

[0032] Figure 5 is a schematic diagram of the structure of the cutting die mechanism and the intermittent pushing assembly in the embodiment of the present application;

[0033] Figure 6 is Figure 5 is a local enlarged schematic diagram of part A in

[0034] Figure 7 is a schematic diagram of the structure of the punching mechanism in the embodiment of the present application;

[0035] Figure 8FIG. 1 is a structural schematic diagram of a rebound assembly in the embodiment of the present application.

[0036] In the figure, 1, machine tool; 11, lower accommodating groove; 2, pressing block; 21, guide column; 22, upper accommodating groove; 3, driving mechanism; 31, hydraulic cylinder; 32, eccentric driving assembly; 321, rotating shaft; 322, eccentric shaft; 323, shaft sleeve; 324, mounting block; 325, first driving motor; 33, fixed frame; 34, backing plate; 35, driving piece; 4, conveying mechanism; 41, clamping and pushing assembly; 411, moving block; 412, feeding roller; 413, pushing plate; 414, fixed block; 415, driving rod; 416, driving disc; 42, intermittent pushing assembly; 421, pressing plate; 422, connecting block; 423, second driving motor; 424, pushing block; 5, die cutting mechanism; 51, upper cutter; 52, lower cutter; 53, backing block; 6, stamping mechanism; 61, molding table; 611, stamping groove; 612, limiting groove; 62, stamping block; 63, rebound assembly; 631, top block; 632, rebound spring; 64, limiting block. DETAILED DESCRIPTION

[0037] The following will be described in detail below with reference to the accompanying drawings. Figure 1 - the accompanying drawings Figure 8 The present application will be described in further detail.

[0038] Embodiment 1: A U-shaped nail forming machine, referring to Figure 1 , Figure 2 and Figure 3 , comprising a machine tool 1, a pressing block 2 is arranged above the machine tool 1, four guide columns 21 are fixed at the four corners of the pressing block 2 close to one side of the machine tool 1, and the guide columns 21 are slidingly connected with the machine tool 1 in the vertical direction. A conveying mechanism 4, a die cutting mechanism 5 and a stamping mechanism 6 are arranged between the pressing block 2 and the machine tool 1, and a driving mechanism 3 for driving the pressing block 2 to move up and down is arranged above the pressing block 2.

[0039] The conveying mechanism 4 conveys the wire plate to the die cutting mechanism 5, the die cutting mechanism 5 cuts the wire plate, the cut wire plate is conveyed to the stamping mechanism 6 by the conveying mechanism 4, and the stamping mechanism 6 stamps the cut wire plate into a U-shaped nail. In this process, the driving mechanism 3 drives the pressing block 2 to move up and down, when the pressing block 2 moves downward to approach the machine tool 1, the die cutting mechanism 5 cuts the wire plate, and at the same time, the stamping mechanism 6 stamps the U-shaped nail, when the pressing block 2 moves away from the machine tool 1 by the driving mechanism 3, the conveying mechanism 4 conveys the wire plate again, so as to reciprocate and quickly manufacture the U-shaped nail.

[0040] Referring to Figure 1 and Figure 2The driving mechanism 3 comprises a hydraulic cylinder 31 vertically fixed above the pressing block 2, an eccentric driving assembly 32 is arranged above the hydraulic cylinder 31, a fixed frame 33 is fixedly connected to the eccentric driving assembly 32, and the fixed frame 33 is fixed to the machine tool 1. The eccentric driving assembly 32 comprises rotating shafts 321 arranged at two ends of the fixed frame 33, the rotating shafts 321 are rotatably connected to the fixed frame 33 through bearings, the bearings are not shown in the figure, the two rotating shafts 321 are coaxially arranged, and an eccentric shaft 322 is fixedly connected between the two rotating shafts 321, the axis of the eccentric shaft 322 is parallel to but not coincident with the axis of the rotating shaft 321, and the diameter of the eccentric shaft 322 is greater than the diameter of the rotating shaft 321. An outer side of the eccentric shaft 322 is provided with a shaft sleeve 323 coaxial with the eccentric shaft 322, two mounting blocks 324 are arranged between the eccentric shaft 322 and the shaft sleeve 323, the two mounting blocks 324 are fixed at two ends inside the shaft sleeve 323, and the mounting blocks 324 are fixedly connected to the eccentric shaft 322, the shaft sleeve 323 is connected to the eccentric shaft 322 through the connection, so that the weight can be reduced, and the centrifugal force of eccentric vibration is facilitated. The lower side of the shaft sleeve 323 abuts against a backing plate 34, and the backing plate 34 is arranged at the upper end of the hydraulic cylinder 31. One of the rotating shafts 321 penetrates through the fixed frame 33 and is fixed with a pulley, and a first driving motor 325 is arranged on the machine tool 1, and the first driving motor 325 drives the pulley to rotate through a belt.

[0041] A driving member 35 for driving the pressing block 2 to move towards the side where the rotating shaft 321 is arranged is further arranged between the fixed frame 33 and the pressing block 2, the driving member 35 is arranged as a driving spring, one end of the driving spring is fixed to the upper end of the fixed frame 33, and the other end is fixed to the pressing block 2 vertically downward, and the driving spring is in a state of not being connected to the pressing block 2 in the figure.

[0042] The first driving motor 325 drives the rotating shaft 321 to rotate, the rotating shaft 321 drives the eccentric shaft 322 to rotate, so that the shaft sleeve 323 rotates with the eccentric shaft 322, in this process, the driving spring applies a force to the pressing block 2 towards the rotating shaft 321, so that the backing plate 34 always abuts against the shaft sleeve 323, therefore, when the shaft sleeve 323 moves eccentrically relative to the rotating shaft 321, the pressing block 2 moves up and down in a small stroke range, so that the shearing die and the stamping work are quickly completed. The hydraulic cylinder 31 can drive the pressing block 2 to move in a large stroke range, so that the shearing die mechanism 5 and the stamping mechanism 6 are conveniently maintained and replaced.

[0043] Referring to Figure 1 and Figure 2 , the conveying mechanism 4 comprises a clamping and pushing assembly 41 for conveying the wire plate to the shearing die mechanism 5 and an intermittent pushing assembly 42 for conveying the wire plate between the shearing die mechanism 5 and the stamping mechanism 6.

[0044] Referring to Figure 3 and Figure 4The clamping and pushing assembly 41 comprises two moving blocks 411 arranged oppositely on the upper end surface of the machine tool 1, and the two moving blocks 411 are slidingly connected to the machine tool 1 and face the die cutting mechanism 5, and the wire plate is conveyed between the two moving blocks 411. A feeding roller 412 is arranged between the two moving blocks 411, and the two ends of the feeding roller 412 are rotationally connected to the two moving blocks 411 respectively, and the axis of the feeding roller 412 is perpendicular to the moving direction of the moving blocks 411. A push plate 413 is arranged on the side of the feeding roller 412 close to the die cutting mechanism 5, one side of the push plate 413 is fixedly connected to the feeding roller 412, and the other side gradually deviates from the feeding roller 412 and abuts against the wire plate. At this time, the end of the push plate 413 abutting against the wire plate has a certain slope relative to the feeding roller 412, and the included angle with the wire plate is an acute angle.

[0045] When the two moving blocks 411 move forward synchronously along the moving direction of the wire plate, the moving blocks 411 drive the feeding roller 412 to move, the wire plate applies a resistance to the push plate 413 in the opposite direction of the moving direction of the moving blocks 411, so that the feeding roller 412 rotates and presses the push plate 413 tightly on the wire plate, thereby increasing the pressure and static friction force of the push plate 413 on the wire plate, so as to drive the wire plate and the moving blocks 411 to move synchronously; when the moving blocks 411 move backward, the resistance of the wire plate to the push plate 413 is also opposite to the moving direction of the moving blocks 411 at this time, so that the feeding roller 412 rotates and reduces the pressure of the push plate 413 on the wire plate, thereby not driving the wire plate to move backward.

[0046] Referring to Figure 2 and Figure 3 , the same fixed block 414 is fixedly connected to the two moving blocks 411, one end of the fixed block 414 is rotationally connected to the driving rod 415, one end of the driving rod 415 away from the fixed block 414 is rotationally connected to the driving disc 416, and the rotation point is not at the center of the driving disc 416, and the driving disc 416 is connected to the other rotating shaft 321 through a belt. When the rotating shaft 321 rotates, power is provided for the clamping and pushing assembly 41, and since the clamping and pushing assembly 41 intermittently conveys the wire plate, sufficient time can be provided for the die cutting and punching of the wire plate.

[0047] Referring to Figure 5 , the clamping and pushing assembly 41 conveys the wire plate to the die cutting mechanism 5, a lower accommodating groove 11 is arranged on the machine tool 1 below the wire plate, an upper accommodating groove 22 is arranged on the pressing block 2 opposite to the lower accommodating groove 11, the die cutting mechanism 5 comprises a lower cutter 52 arranged in the lower accommodating groove 11 and an upper cutter 51 arranged in the upper accommodating groove 22, and the lower cutter 52 and the upper cutter 51 are arranged oppositely.

[0048] A spacer 53 is arranged in the lower accommodating groove 11, one side of the spacer 53 abuts against the side wall of the lower cutter 52, and the other side abuts against the side wall of the lower accommodating groove 11, and the lower cutter 52 and the lower accommodating groove 11 are fixedly connected by screwing.

[0049] The cutting edge of the lower cutter 52 is flush with the upper end surface of the base, and the cutting edge of the upper cutter 51 protrudes beyond the lower end surface of the pressing block 2, and the distance by which the upper cutter 51 protrudes beyond the lower end surface of the pressing block 2 is slightly greater than the thickness of the wire plate.

[0050] Different specifications of spacers 53 are arranged on both sides of the lower cutter 52 and the upper cutter 51, and the positions of the lower cutter 52 in the lower accommodating groove 11 and the upper cutter 51 in the upper accommodating groove 22 are adjusted, so as to adjust the size of the wire plate to be cut, thereby producing U-shaped nails with different nail leg sizes.

[0051] The cut wire plate is moved from the cutting die mechanism 5 to the stamping mechanism 6 by the intermittent pushing assembly 42, which comprises a pressing plate 421 arranged above the cut wire plate, the pressing plate 421 being perpendicular to the moving direction of the wire plate and facing the stamping mechanism 6. The end of the pressing plate 421 away from the stamping mechanism 6 is fixedly connected with a connecting block 422, the connecting block 422 being slidingly connected with the machine tool 1, and the sliding direction is parallel to the moving direction of the pressing plate 421. A second driving motor 423 is installed on the machine tool 1, and the second driving motor 423 drives the connecting block 422 to slide through an eccentric connecting rod.

[0052] Referring to Figure 5 and Figure 6 , a pushing block 424 is fixedly arranged below the pressing plate 421, the pushing block 424 being located between the connecting block 422 and the wire plate, and one side of the pushing block 424 being capable of abutting against the side edge of the wire plate and pushing the cut wire plate. After the cut wire plate is separated from the subsequent wire plate, the pushing block 424 pushes the wire plate to move towards the side where the stamping mechanism 6 is located.

[0053] Referring to Figure 7 and Figure 8 , after the wire plate is conveyed to the stamping mechanism 6 by the intermittent pushing assembly 42, the stamping mechanism 6 stamps the wire plate. The stamping mechanism 6 comprises a molding piece arranged on the side of the wire plate away from the connecting block 422, and the molding piece comprises a molding table 61 fixedly arranged on the machine tool 1, the upper end surface of the molding table 61 being slightly lower than the lower end surface of the wire plate, and a stamping groove 611 being arranged on the upper end surface of the molding table 61, and the center line of the stamping groove 611 being in the same vertical plane as the center line of the pressing plate 421.

[0054] The punching mechanism 6 further comprises a rebound assembly 63, which comprises a top block 631 arranged in the punching groove 611, and in a vertical section parallel to the moving direction of the wire plate, the section of the top block 631 is inverted T-shaped, and the section of the punching groove 611 is also inverted T-shaped, and the top block 631 is in sliding connection with the punching groove 611 in the vertical direction. The upper end surface of the top block 631 is flush with the upper end surface of the molding table 61, and the lower end of the top block 631 is fixed with a rebound spring 632, and the end of the rebound spring 632 away from the top block 631 is fixedly connected with the groove bottom of the punching groove 611.

[0055] The punching mechanism 6 further comprises a punch 62 fixed on the lower end surface of the pressing block 2, and the punch 62 is arranged in parallel and opposite to the top block 631, and the width of the punch 62 is slightly smaller than the width of the top block 631, and is used to reserve the thickness of the wire plate. Limiting grooves 612 are arranged on both sides of the punching groove 611 and are opened on the upper end surface of the molding table 61, the limiting grooves 612 are in communication with the punching groove 611, and the limiting blocks 64 are detachably arranged in the limiting grooves 612, and by adjusting the distance between the two limiting blocks 64, the U-shaped nails meeting the width requirements can be produced.

[0056] After the cut wire plate moves above the top block 631, the pressing block 2 is lowered, the punch 62 is pressed on the center line of the wire plate, and the punch 62, the middle part of the wire plate and the top block 631 continue to slide into the punching groove 611, and the two sides of the wire plate are bent at the groove side wall of the punching groove 611, and the width of the top block 631 is not less than the width of the sum of the width of the punch 62 and the thickness of the two ends of the wire plate, so as to produce the U-shaped nail.

[0057] After the punch 62 is separated from the punching groove 611, the rebound spring 632 pushes the top block 631 and the U-shaped nail upwards until the U-shaped nail is completely separated from the punching groove 611, and when the next wire plate 9 is conveyed, the wire plate pushes the U-shaped nail to separate from the punching mechanism 6.

[0058] The implementation principle of the embodiment of the application is that when the first driving motor 325 drives the eccentric driving assembly 32 to move and the pressing block 2 to rise, the second driving motor 423 pushes the cut wire plate to the punching mechanism 6, and then the clamping and pushing assembly 41 pushes the wire plate to the shearing die mechanism 5; when the first driving motor 325 drives the pressing block 2 to descend, the shearing die mechanism 5 shears the wire plate, and the wire plate at the punching mechanism 6 is pressed into a U-shaped nail;

[0059] When it is necessary to replace the width of the U-shaped nail or the length of the nail leg, the hydraulic cylinder 31 drives the pressing block 2 to rise, so as to facilitate the adjustment of the upper cutter 51, the lower cutter 52 and the limiting block 64, thereby quickly adjusting the specifications of the U-shaped nail.

[0060] The embodiments of the present application are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, wherein the same parts are denoted by the same reference numerals. Therefore, any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A U-shaped nail forming machine, comprising a machine tool (1), a pressure block (2) slidably connected above the machine tool (1), a conveying mechanism (4), a shearing mechanism (5), and a stamping mechanism (6) provided between the pressure block (2) and the machine tool (1), and a driving mechanism (3) for driving the pressure block (2) to move up and down provided above the pressure block (2), characterized in that, The drive mechanism (3) includes a hydraulic cylinder (31) disposed above the pressure block (2), and an eccentric drive assembly (32) is provided at the end of the hydraulic cylinder (31) away from the pressure block (2). The stamping mechanism (6) includes a punch (62) disposed on the pressure block (2) and a detachable plastic part disposed on the machine tool (1), wherein the punch (62) and the plastic part are disposed opposite to each other; The conveying mechanism (4) includes a clamping and pushing assembly (41) for conveying the wire plate to the shearing mechanism (5) and an intermittent pushing assembly (42) for conveying the wire plate between the shearing mechanism (5) and the stamping mechanism (6). The eccentric drive assembly (32) includes a rotating shaft (321) rotatably connected to the machine tool (1), an eccentric shaft (322) parallel to the rotating shaft (321) on the rotating shaft (321), the axis of the eccentric shaft (322) being offset from the axis of the rotating shaft (321), a bushing (323) being sleeved on the outer side of the eccentric shaft (322), the outer diameter of the bushing (323) being larger than the outer diameter of the rotating shaft (321), and the bushing (323) being located at the end of the hydraulic cylinder (31) away from the pressure block (2), and the side wall of the bushing (323) abutting the end of the hydraulic cylinder (31), and a drive member (35) is provided above the pressure block (2) to drive the pressure block (2) to move toward the rotating shaft (321). The driving component (35) is configured as a driving spring in a stretched state. One end of the driving spring is fixedly connected to the upper end of the machine tool (1), and the other end is fixedly connected to the pressure block (2). The molded part includes a molding table (61) mounted on a machine tool (1). The upper end face of the molding table (61) is provided with a stamping groove (611). The upper end face of the molding table (61) is also provided with limiting grooves (612) located on both sides of the stamping groove (611). The limiting grooves (612) are connected to the stamping groove (611). The limiting grooves (612) are also provided with limiting blocks (64) for limiting the width of the U-shaped nail. The stamping groove (611) is provided with a spring-loaded component (63).

2. The U-shaped nail forming machine according to claim 1, characterized in that, The clamping and pushing assembly (41) includes a feeding roller (412) that is rotatably and slidably connected to the machine tool (1). The feeding roller (412) slides towards the shearing mechanism (5). A push plate (413) is provided on the side of the lower end of the feeding roller (412) near the shearing mechanism (5). The end of the push plate (413) away from the feeding roller (412) abuts against the wire plate on the machine tool (1).

3. A U-shaped nail forming machine according to claim 2, characterized in that, The intermittent pushing component (42) is located on the side of the shearing mechanism (5) away from the clamping and pushing component (41). The intermittent pushing component (42) includes a pressure plate (421) slidably connected to the machine tool (1). The moving direction of the pressure plate (421) is parallel to the feeding roller (412) and toward the stamping mechanism (6). The lower end face of the pressure plate (421) is higher than the upper end face of the wire plate. A push block (424) is provided below the pressure plate (421). The push block (424) abuts against the side wall of the wire plate.

4. A U-shaped nail forming machine according to claim 1, characterized in that, The shearing mechanism (5) includes an upper cutter (51) disposed on the lower end face of the pressure block (2) and a lower cutter (52) disposed on the machine tool (1). The upper cutter (51) and the lower cutter (52) are disposed opposite to each other and are located between the clamping and pushing assembly (41) and the intermittent pushing assembly (42).

5. A U-shaped nail forming machine according to claim 1, characterized in that, The spring-loaded assembly (63) includes a top block (631) slidably connected in the stamping groove (611), and a spring-loaded spring (632) connecting the top block (631) and the bottom of the stamping groove (611).

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