A wire pressing structure for a wire closing machine

Abstract

A wire crimping structure of a wire combining machine comprises a frame, a conductor frame, a conductor guide, an upper film transfer mechanism, a lower film transfer mechanism, a first punching device, a second punching device, and a conductor hot pressing portion, wherein the upper film transfer mechanism and the first punching device are arranged on the upper side of the frame, and the lower film transfer mechanism and the second punching device are arranged on the lower side of the frame; a first film guide portion is arranged between the upper film transfer mechanism and the first punching device; a second film guide portion is arranged between the lower film transfer mechanism and the second punching device, the conductor frame and the conductor hot pressing portion are arranged on the frame, and a conductor guide portion is arranged between the conductor frame and the conductor hot pressing portion; a pressing is performed once before pressing the insulating film and the metal conductor to form a combination of multiple layers of insulating films; the design of the conductor guide portion and the sliding portion solves the problems of long distance and large waste in the process of replacing and adjusting the position of the metal conductor; the design of the first punching device and the upper components of the second punching device realizes a more precise adjustment of the position of the punching module.

Description

Technical Field

[0001] The invention belongs to an automatic wire closing machine, and in particular relates to a wire pressing structure of the wire closing machine. Background Art

[0002] Flexible Flat Cable (FFC) is a new type of data cable made of PET insulation material and extremely thin tinned flat copper wire, which is pressed together through an automated production line. The current FFC forming equipment punches holes in the FFC film, then bonds the film and metal conductor together, and then attaches a reinforcing plate to the punched holes. However, some FFCs require adhesive film to be attached to the openings. Existing FFC production equipment is difficult to complete in the second forming process, and requires manual or secondary processing, resulting in a waste of time and reduced production efficiency.

[0003] The utility model with patent number 201821497545.8 and its name is an FFC automatic bonding and forming machine. It discloses a wire bonding machine, including a conductor frame for placing metal conductors, a bonding main machine for bonding conductors and films, and a receiving machine for storing finished products, the bonding main machine includes a bonding frame, a guide assembly arranged on the bonding frame for guiding the metal conductor, two groups of film-setting assemblies arranged behind the guide assembly and parallel to each other for conveying the film, a first hot pressing device for bonding the film and the metal conductor behind the film-setting assembly, a reinforcement plate device arranged behind the first hot pressing device, a second hot pressing device for bonding the reinforcement plate behind the reinforcement plate device, and a stripping device arranged behind the second hot pressing device. A hole-punching assembly for punching holes in the film is arranged behind each group of the film-setting assemblies, and one group of the hole-punching assemblies is arranged behind A film coating assembly is provided, which includes a film roller for placing the film, a film support, a film conveying mechanism for conveying the film, a film clamping mechanism slidably connected to the film support along a direction perpendicular to the moving direction of the film for clamping and pulling the film, a film cutting mechanism slidably connected to the film support along a vertical direction for cutting the film, a film pressing mechanism slidably connected to the film support along a vertical direction for pressing the film with the film, and a film pressing plate placed under the film pressing mechanism; the film clamping mechanism is moved to clamp the film and pull the film out, and then the film is clamped by the film cutting mechanism using a cylinder or a motor, and the film pressing mechanism is moved by a motor or a cylinder to stick the film to the opening of the film on the film pressing plate, and the film sticking work of the FFC is completed in one processing, which is completed in the original process, saving time and improving production efficiency.

[0004] The existing technology can only stick two layers of film for bonding, and cannot meet the needs of supplementing the number of layers of insulating film according to different requirements. At the same time, the original device has a complex structure, high cost and high waste rate. Specifically, the conductor guide part is close to the hot pressing part, resulting in a long distance between the conductor frame and the conductor guide part, and great waste during the machine adjustment process. There are problems such as the inaccurate position adjustment of the punching modules of different shapes on the first punching device and the second punching device, and large errors. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a wire pressing structure of a wire closing machine, thereby solving the above problems.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a wire pressing structure of a wire closing machine, comprising a frame, a conductor frame, a conductor guide part, an upper film transfer mechanism, a lower film transfer mechanism, a first punching device, a second punching device, and a conductor hot pressing part, wherein the upper film transfer mechanism and the first punching device are arranged on the upper side of the frame, and the lower film transfer mechanism and the second punching device are arranged on the lower side of the frame; a first film guide part is arranged between the upper film transfer mechanism and the first punching device; a second film guide part is arranged between the lower film transfer mechanism and the second punching device, the conductor frame and the conductor hot pressing part are arranged on the frame, and a conductor guide part is arranged between the conductor frame and the conductor hot pressing part, the upper film transfer mechanism comprises a first film mounting frame and a second film mounting frame, and a first fixed plate; the first film mounting frame and the second film mounting frame are fixed on the first fixed plate; a first double film guide part and a first hot pressing part are also arranged on the first fixed plate; the lower film transfer mechanism comprises a third film mounting frame and a fourth film mounting frame, and a second fixed plate; the third film mounting frame and the fourth film mounting frame are fixed on the second fixed plate; a second double film guide part and a second hot pressing part are also arranged on the second fixed plate.

[0007] As a preferred solution of the present invention, a sliding part is provided on the frame, a slide rail is provided on the sliding part, a corresponding groove is provided on the conductor guide part, and a locking mechanism is provided on the sliding part and the conductor guide part.

[0008] As a preferred solution of the present invention, the locking mechanism includes an insertion plate and an insertion rod arranged on the sliding part, and a clamping plate and a clamping groove arranged on the conductor guide part; the insertion plate is provided with an insertion hole, and the insertion rod is provided with a rod cap.

[0009] As a preferred solution of the present invention, the card plate is further provided with an arc-shaped card surface.

[0010] As a preferred solution of the present invention, the clamping plate is connected to the sliding plate, and the slot is arranged on the sliding plate.

[0011] As a preferred solution of the present invention, an insertion sleeve is provided on the insertion plate, a stop surface is provided on the insertion sleeve, the insertion sleeve is arranged in the insertion hole, and a stop block is provided on the insertion rod.

[0012] As a preferred embodiment of the present invention, the first punching device is provided with an upper fixing plate and a lower fixing plate, the punching module is fixed between the upper fixing plate and the lower fixing plate, and the first limiting plate and the second limiting plate are also connected between the upper fixing plate and the lower fixing plate, a first limiting block is provided between the first limiting plate and the punching module, and a second limiting block is provided between the second limiting plate and the punching module; the first limiting plate and the first limiting block, the second limiting plate and the second limiting block are adjusted in position by limiting screws, and the limiting screws pass through the first limiting plate and contact with the first limiting block; the limiting screws pass through the second limiting plate and contact with the second limiting block, and at least two groups of limiting screws are provided.

[0013] As a preferred embodiment of the present invention, the second punching device is provided with an upper fixing plate and a lower fixing plate, the punching module is fixed between the upper fixing plate and the lower fixing plate, and a first limiting plate and a second limiting plate are also connected between the upper fixing plate and the lower fixing plate, a first limiting block is provided between the first limiting plate and the punching module, and a second limiting block is provided between the second limiting plate and the punching module; the first limiting plate and the first limiting block, the second limiting plate and the second limiting block adjust their positions through limiting screws, and the limiting screw passes through the first limiting plate and contacts with the first limiting block; the limiting screw passes through the second limiting plate and contacts with the second limiting block, and at least two groups of the limiting screws are provided; a spring assembly is provided between the limiting screw and the first limiting block, and a spring assembly is provided between the limiting screw and the second limiting block, and the spring assembly passes through elastic holes provided in the first limiting block and the second limiting block, and the limiting screw passes through the spring assembly.

[0014] As a preferred solution of the present invention, there are four groups of limit screws, which are respectively arranged on the edges of the first limit plate and the second limit plate.

[0015] The beneficial effects of the present invention are as follows: a wire pressing structure of a wire combining machine is proposed, and through the design of the first hot pressing part, the second hot pressing part, the first film holding frame, the second film holding frame, the third film holding frame and the fourth film holding frame, a pressing is performed once before the insulating film and the metal conductor are pressed together to form a combination of multiple layers of insulating films; the problem of long distance and large waste in the process of replacing and adjusting the position of the metal conductor is solved through the design of the conductor guide part and the sliding part, and at the same time, the space of the adjustment part is increased, which reduces the difficulty of adjusting the machine, and at the same time, the space of the adjustment part is increased, which reduces the difficulty of adjusting the machine; through the design of the first punching device and the upper part of the second punching device, a more precise adjustment of the position of the punching module is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 Schematic diagram of the conductor guide structure of the present invention Figure 1 ;

[0019] Figure 3 Schematic diagram of the conductor guide structure of the present invention Figure 2 ;

[0020] Figure 4 Schematic diagram of the conductor guide structure of the present invention Figure 3 ;

[0021] Figure 5 This is a schematic diagram of the structure of the conductor guide part of the first punching device and the second punching device of the present invention.

[0022] The numbers in the figure are: 1, frame; 2, conductor frame; 3, conductor guide part; 4, upper film transfer mechanism; 5, lower film transfer mechanism; 6, second punching device; 7, conductor hot pressing part; 8, first punching device; 41, first film guide part; 51, second film guide part; 42, first film placement frame; 43, second film placement frame; 44, first fixed plate; 441, first double film guide part; 442, first hot pressing part; 52, third film placement frame; 53, fourth film placement frame; 54, second fixed plate; 541, second double film guide part; 542, second hot pressing part; 11, sliding part; 111, slide rail; 31, locking mechanism; 311, insertion plate; 312, insertion rod; 313, card plate; 314, card slot; 3111, insertion hole; 3121, rod cap; 3131, arc-shaped card surface; 315, sliding plate; 3151, notch; 81, upper fixing plate; 82, lower fixing plate; 83, punching module; 84, first limit plate; 85, second limit plate; 841, first limit block; 851, second limit block; 55, automatic deviation correction mechanism; 842, elastic hole; 852, limit screw; 8521, spring assembly; 55, automatic deviation correction mechanism; 26, tension control mechanism; 25, disconnection alarm mechanism; 24, dust suction mechanism. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0024] The terms "first", "second", "third", "fourth", "upper", "lower", "inner", "outer", etc. in the present invention are used to distinguish different objects rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, if a series of connection relationships are included, those skilled in the art can achieve the connection effect through a variety of technical means, which is also equivalent to the protection scope of this embodiment.

[0025] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] Example:

[0028] like Figure 1The wire crimping structure of a wire closing machine shown in the figure comprises a frame 1, a conductor frame 2, a conductor guide part 3, an upper film transfer mechanism 4, a lower film transfer mechanism 5, a first punching device 8, a second punching device 6, and a conductor hot pressing part 7, wherein the upper film transfer mechanism 4 and the first punching device 8 are arranged on the upper side of the frame 1, and the lower film transfer mechanism 5 and the second punching device 6 are arranged on the lower side of the frame 1; a first film guide part 41 is arranged between the upper film transfer mechanism 4 and the first punching device 8; a second film guide part 51 is arranged between the lower film transfer mechanism 5 and the second punching device 6, the conductor frame 2 and the conductor hot pressing part 7 are arranged on the frame 1, a conductor guide part 3 is arranged between the conductor frame 2 and the conductor hot pressing part 2, the upper film transfer mechanism 4 comprises a first film mounting frame 42 and a second film mounting frame 43, and a first fixing plate 44; the first film mounting frame 42 and the second film mounting frame 43 are fixed on the first fixing plate 44; the first fixing plate 44 A first double film guide portion 441 and a first hot pressing portion 442 are also provided on the top; the lower film transfer mechanism 5 includes a third film frame 52 and a fourth film frame 53, and a second fixed plate 54; the third film frame 52 and the fourth film frame 53 are fixed on the second fixed plate 54; the second fixed plate 54 is also provided with a second double film guide portion 541 and a second hot pressing portion 542; specifically: the metal conductor is arranged on the conductor frame 2 and enters the conductor hot pressing portion 7 through the conductor guide portion 3; the upper insulating film is arranged on the first film frame 42 and the second film frame 43, the insulating film is merged in the first double film guide portion 441, enters the first hot pressing portion 442, the glue on the surface of the insulating film is heated in the first hot pressing portion 442 to melt and then bonded together, and enters the first punching device 8 through the first film guide portion 41, and the bonded insulating film is sheared according to the covering needs, and the sheared insulating film enters the conductor hot pressing portion 7 The lower insulating film is arranged on the third film mounting frame 52 and the fourth film mounting frame 53, and the insulating film is merged in the second double film guide portion 541 and enters the second hot pressing portion 542. The glue on the surface of the insulating film is heated in the second hot pressing portion 542 to melt and then bonded together. The insulating film enters the second punching device 6 through the second film guide portion 51, and the bonded insulating film is sheared according to the covering needs. The sheared insulating film enters the conductor hot pressing portion 7, and the upper insulating film and the lower insulating film heat the metal conductor arranged in the middle in the conductor hot pressing portion 7, and the metal conductor is wrapped by pressing to complete the process of the wire pressing part structure; as an optimization of the scheme, a wire break alarm mechanism 25, a dust suction mechanism 24, and a tension control mechanism 26 are provided on the conductor frame 2, wherein the wire break alarm mechanism 25 is used to detect wire breakage and alarm; the dust suction mechanism 24 is used to suck out dust attached to the metal conductor, and the tension control mechanism 26 is used to detect the tension of the metal conductor during movement, and the adjustment is achieved by moving the roller up and down.

[0029] In view of the optimization of the upper film transfer mechanism 4 and the lower film transfer mechanism 5 in the above embodiment, the upper film transfer mechanism 4 and the lower film transfer mechanism 5 are further provided with an automatic deviation correction mechanism 55, which adjusts the direction of the film to achieve position adjustment of the insulating film.

[0030] As an embodiment of the present invention optimized for the conductor guide 3 (such as Figure 2-4 As shown in the figure, specifically, a sliding part 11 is provided on the frame 1, a slide rail 111 is provided on the sliding part 11, a corresponding groove 3151 is provided on the conductor guide part 3, and a locking mechanism 31 is provided on the sliding part 11 and the conductor guide part 3; during the debugging and installation process, the conductor guide part 3 slides to the proximal end of the conductor frame 2 under the action of the groove 3151 and the slide rail 111, and the installation and position adjustment of the metal conductor are completed at the proximal end. The adjusted conductor guide part 3 moves to the distal end of the conductor frame 2 and is fixed under the action of the locking mechanism 31. This connection structure solves the problems of long distance and large waste in the process of replacing and adjusting the position of the metal conductor, while increasing the space of the adjustment part and reducing the difficulty of adjusting the machine; the locking mechanism 31 is used to fix the position of the conductor guide part 3. The present invention proposes a connection structure that is easy to operate, specifically: the locking mechanism 31 includes an insertion plate 311, an insertion rod 312, and a clamping plate 313 and a clamping groove 314 arranged on the sliding part 11; the insertion plate 311 is provided on An insertion hole 3111 is provided, and a rod cap 3121 is provided on the insertion rod 312; the insertion rod 312 is inserted into the card slot 314 to achieve the fixation of the conductor guide part 3. In order to better achieve the lower end of the insertion rod 311 entering the card slot 314 during the movement, an arc-shaped card surface 3131 is also provided on the card plate 313. During the movement of the conductor guide part 3, the insertion rod 312 contacts the arc-shaped card surface 3131, and the insertion rod 312 moves upward. When it reaches the position of the card slot 314, the insertion stem 312 enters the card slot 314 downward to achieve fixation; if adjustment is required, the rod cap 3121 is manually pulled upward to allow the insertion rod 312 to move upward and disengage from the card slot 314, so that the position of the conductor guide part 3 can be moved; for the optimization of the conductor guide part 3, a preheating component is provided in the conductor guide part 3, which can preheat the metal conductor to facilitate the pressing of the conductor entering the conductor hot pressing part 7.

[0031] In order to better realize the connection between the structures, the clamping plate 313 is connected to the sliding plate 315 , and the slot 3151 is provided on the sliding plate 315 .

[0032] With respect to the connection structure of the insertion rod 312, this embodiment proposes a connection method, specifically: an insertion sleeve 3112 is provided on the insertion plate 311, a blocking surface 31121 is provided on the insertion sleeve 3112, the insertion sleeve 3112 is arranged in the insertion hole 3111, and a blocking block 3122 is provided on the insertion rod 312; the blocking block 3122 increases the area of ​​the rod cap 3121 that can be manually released, so as to facilitate manual taking and adjustment of the position of the insertion rod 312.

[0033] The present invention provides a new position correction structure for the first punching device 8 and the second punching device 6. Specifically: the first punching device 8 is provided with an upper fixing plate 81 and a lower fixing plate 82, the punching module 83 is fixed between the upper fixing plate 81 and the lower fixing plate 82, and the first limiting plate 84 and the second limiting plate 85 are also connected between the upper fixing plate 81 and the lower fixing plate 82. A first limiting block 841 is provided between the first limiting plate 84 and the punching module 83, and a second limiting block 851 is provided between the second limiting plate 85 and the punching module 81; the first limiting plate 84 and the first limiting block 841, the second limiting plate 85 and the second limiting block 851 are adjusted in position by limiting screws 852, and the limiting screws pass through the first limiting plate 84 and contact the first limiting block 841; the limiting screws 852 The second limiting plate 85 contacts the second limiting block 851, and the limiting screws 852 are provided with at least two groups; during the adjustment process, the limiting screws are moved, and one side of the limiting screws 852 pushes against the first limiting block 841 to move. The first limiting block 841 has a large contact surface with the punching module 83, and the part with large force will push the punching module 83 to produce displacement, thereby realizing position adjustment. and the second limiting block 851 are pushed to achieve position adjustment, and the limiting screws are at least two groups; similarly, the second punching device 6 is provided with an upper fixing plate 81 and a lower fixing plate 82, the punching module 83 is fixed between the upper fixing plate 81 and the lower fixing plate 82, and the first limiting plate 84 and the second limiting plate 85 are also connected between the upper fixing plate 81 and the lower fixing plate 82, a first limiting plate 84 and a second limiting plate 85 are provided between the first limiting plate 84 and the punching module 81, and a second limiting block 851 is provided between the second limiting plate 85 and the punching module 81; the first limiting plate 84 and the first limiting block 841, the second limiting plate 85 and the second limiting block 851 are adjusted in position by the limiting screw 852, and the limiting screw 852 passes through the first limiting plate 84 and contacts with the first limiting block 841; the limiting screw 852 passes through the second limiting plate 85 and the second limiting plate The first limiting plate 841 and the second limiting plate 851 are in contact with each other, and at least two groups of limiting screws are provided; the punching module 81 can be adjusted by increasing the contact surface between the first limiting plate 841 and the second limiting plate 851 and the punching module 81, and the adjustment accuracy is higher; based on the adjustment effect of the limiting screw 852, the limiting screw 852 is divided into four groups, which are respectively arranged on the edges of the first limiting plate and the second limiting plate, and more accurate positioning can be achieved through adjustment of four points; for the design of the limiting screw, the present invention provides a new connection structure, wherein a spring assembly 8521 is provided between the limiting screw 852 and the first limiting block 841, and a spring assembly 8521 is provided between the limiting screw 852 and the second limiting block 851, and the spring assembly passes through the elastic hole 842 arranged in the first limiting block 841 and the second limiting block 851, and the limiting screw 852 passes through the spring assembly 8521, and the balance of force is provided through the adjustment of the spring assembly 8521, and it is more convenient to operate.

[0034] The beneficial effects of the present invention are as follows: a wire pressing structure of a wire combining machine is proposed, and through the design of the first hot pressing part, the second hot pressing part, the first film holding frame, the second film holding frame, the third film holding frame and the fourth film holding frame, a pressing is performed once before the insulating film and the metal conductor are pressed together to form a combination of multiple layers of insulating films; the problem of long distance and large waste in the process of replacing and adjusting the position of the metal conductor is solved through the design of the conductor guide part and the sliding part, and at the same time, the space of the adjustment part is increased, reducing the difficulty of adjusting the machine; through the design of the first punching device and the upper component of the second punching device, a more precise adjustment of the position of the punching module is achieved.

[0035] In summary, the technical solutions in the embodiments described above can be combined with each other, and other combinations not described in this specification should also be within the protection scope of the present invention.

Claims

1. A wire crimping structure of a wire closing machine, comprising a frame, a conductor frame, a conductor guide portion, an upper film transfer mechanism, a lower film transfer mechanism, a first punching device, a second punching device, and a conductor hot pressing portion, wherein the upper film transfer mechanism and the first punching device are arranged on the upper side of the frame, and the lower film transfer mechanism and the second punching device are arranged on the lower side of the frame; a first film guide portion is arranged between the upper film transfer mechanism and the first punching device; a second film guide portion is arranged between the lower film transfer mechanism and the second punching device, the conductor frame and the conductor hot pressing portion are arranged on the frame, and a conductor guide portion is arranged between the conductor frame and the conductor hot pressing portion, characterized in that The upper film transfer mechanism includes a first film frame and a second film frame, and a first fixed plate; the first film frame and the second film frame are fixed on the first fixed plate; the first fixed plate is also provided with a first double film guide portion and a first hot pressing portion; the lower film transfer mechanism includes a third film frame and a fourth film frame, and a second fixed plate; the third film frame and the fourth film frame are fixed on the second fixed plate; the second fixed plate is also provided with a second double film guide portion and a second hot pressing portion.

2. According to claim 1, a wire crimping structure for a wire joining machine is characterized in that The frame is provided with a sliding part, the sliding part is provided with a slide rail, the conductor guide part is provided with a corresponding groove, and the sliding part and the conductor guide part are provided with a locking mechanism.

3. According to claim 2, a wire crimping structure for a wire joining machine is characterized in that The locking mechanism comprises an insertion plate and an insertion rod arranged on the sliding part, and a clamping plate and a clamping groove arranged on the conductor guiding part; the insertion plate is provided with an insertion hole, and the insertion rod is provided with a rod cap.

4. According to claim 3, a wire crimping structure for a wire joining machine is characterized in that The card plate is also provided with an arc-shaped card surface.

5. According to claim 3, a wire crimping structure for a wire joining machine is characterized in that The clamping plate is connected to the sliding plate, and the slot is arranged on the sliding plate.

6. The wire crimping structure of a wire joining machine according to claim 3, characterized in that An inserting sleeve is arranged on the inserting plate, a blocking surface is arranged on the inserting sleeve, the inserting sleeve is arranged in the inserting hole, and a blocking block is arranged on the inserting rod.

7. The wire crimping structure of a wire joining machine according to claim 1, characterized in that The first punching device is provided with an upper fixing plate and a lower fixing plate, the punching module is fixed between the upper fixing plate and the lower fixing plate, and a first limiting plate and a second limiting plate are also connected between the upper fixing plate and the lower fixing plate, a first limiting block is provided between the first limiting plate and the punching module, and a second limiting block is provided between the second limiting plate and the punching module; the first limiting plate and the first limiting block, the second limiting plate and the second limiting block are adjusted in position by limiting screws, and the limiting screws pass through the first limiting plate and contact with the first limiting block; the limiting screws pass through the second limiting plate and contact with the second limiting block, and at least two groups of limiting screws are provided.

8. The wire crimping structure of a wire joining machine according to claim 1, characterized in that The second punching device is provided with an upper fixing plate and a lower fixing plate, the punching module is fixed between the upper fixing plate and the lower fixing plate, and a first limiting plate and a second limiting plate are also connected between the upper fixing plate and the lower fixing plate, a first limiting block is provided between the first limiting plate and the punching module, and a second limiting block is provided between the second limiting plate and the punching module; the first limiting plate and the first limiting block, the second limiting plate and the second limiting block are adjusted in position by limiting screws, and the limiting screw passes through the first limiting plate and contacts with the first limiting block; the limiting screw passes through the second limiting plate and contacts with the second limiting block, and at least two groups of limiting screws are provided; a spring assembly is provided between the limiting screw and the first limiting block, and a spring assembly is provided between the limiting screw and the second limiting block, the spring assembly passes through elastic holes provided in the first limiting block and the second limiting block, and the limiting screw passes through the spring assembly.

9. A wire crimping structure for a wire joining machine according to claim 7 or 8, characterized in that There are four groups of limit screws, which are respectively arranged on the edges of the first limit plate and the second limit plate.

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