阅读说明：本技术 一种零间隙裁切机构 (Zero clearance cuts mechanism ) 是由 徐涛 徐贵阳 李远鹏 唐梦飞 于 2020-06-04 设计创作，主要内容包括：一种零间隙裁切机构,包括移动刀架、焊带切刀与裁切砧板,其中,焊带切刀通过横向弹性件弹性安装至移动刀架的一侧,焊带切刀具有刀刃段、以及自所述刀刃段的两端的底部朝下延伸形成的导向段,刀刃段的底部具有上裁切边,上裁切边位于所述两个导向段之间,导向段朝向所述移动刀架的一侧的下端具有一内延导向斜面,焊带切刀沿横向上具有初始位置和裁切位置,所述裁切砧板可沿上下方向上移动,且位于焊带切刀的下方。本设计不仅能够实现零间隙裁切,裁切质量较好,而且易于调试,能在裁切之前具备压紧功能。(The utility model provides a zero clearance cuts mechanism, includes removal knife rest, solder strip cutter and cuts the chopping block, wherein, the solder strip cutter passes through horizontal elastic component elastic mounting to one side of removal knife rest, and the solder strip cutter has the sword section and certainly the bottom at the both ends of sword section extends the direction section that forms down, and the bottom of sword section has and cuts the limit, goes up to cut the limit and is located between two direction sections, the direction section orientation the lower extreme of one side of removal knife rest has one and extends the direction inclined plane in, and the solder strip cutter has initial position and cuts the position along horizontal, cut the chopping block and can follow the up-and-down direction and move, and be located the below of solder strip cutter. This design not only can realize that zero clearance cuts, cuts the quality better, and easily debugging moreover can possess before cutting and compress tightly the function.)

1. The utility model provides a zero clearance cuts mechanism which characterized in that: the method comprises the following steps:

a movable tool rest (5) which can move along the up-and-down direction;

the welding strip cutter (3) is elastically installed on one side of the movable tool rest (5) through a transverse elastic piece (522), the welding strip cutter (3) is provided with a cutter edge section (35) and a guide section (32) formed by downwards extending from the bottoms of two ends of the cutter edge section (35), the bottom of the cutter edge section (35) is provided with an upper cutting edge (31), the upper cutting edge (31) is positioned between the two guide sections (32), the lower end of one side, facing the movable tool rest (5), of the guide section (32) is provided with an inward extending guide inclined plane (33), and the welding strip cutter (3) is provided with an initial position and a cutting position along the transverse direction;

the cutting chopping board (4) can move in the up-and-down direction and is positioned below the welding strip cutter (3);

when the welding strip cutter (3) is located at the initial position, the inward extending guide inclined plane (33) is partially located right above the cutting chopping board (4), and when the welding strip cutter (3) is located at the cutting position, the inward extending guide inclined plane (33) is located on one side of the cutting chopping board (4).

2. The zero-gap cutting mechanism of claim 1, wherein: and the connecting part of the inward extending guide inclined surface (33) and the bottom surface of the guide section (32) is chamfered into an external fillet.

3. The zero-gap cutting mechanism of claim 1, wherein: and the outer edge of the cutting chopping board (4) is positioned right below the two guide sections (32) and is provided with a reverse guide fillet (42).

4. The zero-gap cutting mechanism of claim 1, wherein: the transverse elastic member (522) is an elastic washer.

5. The zero-gap cutting mechanism of claim 4, wherein: the welding strip cutter (3) is internally provided with a through outer side screw hole (34) at a position close to the top end of the welding strip cutter, the outer side screw hole (34) corresponds to an inner side screw hole (51) formed in the movable cutter frame (5), the outer side screw hole (34) and the inner side screw hole (51) are in threaded fit with the same side step screw (52), one end of the side step screw (52) is contacted with the side part of the welding strip cutter (3), and the other end of the side step screw (52) sequentially penetrates through a metal washer (521) and a transverse elastic piece (522) and then extends to the inner part of the inner side screw hole (51).

6. The zero-gap cutting mechanism of claim 1, wherein: the top of the movable tool rest (5) is connected with the bottom end of the tool rest driving part (1) through a floating joint (53), and the tool rest driving part (1) drives the movable tool rest (5) and the welding strip cutter (3) to move up and down along the up-down direction.

7. The zero-gap cutting mechanism of claim 1, wherein: a pressing block (6) and an elastic piece (64) are arranged below the movable tool rest (5), the elastic piece (64) is installed between the pressing block (6) and the movable tool rest (5) and used for compressing the elastic piece (64) when the movable tool rest (5) moves downwards and presses the pressing block (6), and the pressing block (6) is elastically pressed on the welding strip.

8. The zero-gap cutting mechanism of claim 7, wherein: the elastic component is a compression spring (64), a narrow-down wide step hole (62) is formed in the pressing block (6), the step hole (62) is provided with a step surface (65), a bottom step screw (63) is arranged in the step hole (62), the head of the bottom step screw (63) is clamped in the step hole (62) and is abutted to the step surface (65) to limit the displacement of the bottom step screw (63) in the upward direction, and the threaded portion of the bottom step screw (63) is installed at the bottom of the movable tool rest (5).

9. The zero-gap cutting mechanism of claim 1, wherein: the cutting chopping board (4) is connected with the top of a movable mounting plate (7) positioned below the cutting chopping board through a fastening screw (71), the bottom of the movable mounting plate (7) is connected with the top end of a chopping board driving piece (2), and the chopping board driving piece (2) drives the movable mounting plate (7) and the cutting chopping board (4) to move up and down in the vertical direction;

the side part of the movable mounting plate (7) is connected with the bottom of the side adjusting mounting plate (8), a tensioning screw (81) and a jacking screw (82) are arranged on the side adjusting mounting plate (8), and the tensioning screw (81) penetrates through a tensioning spring (83) and then is connected with the side adjusting mounting plate (8).

10. The zero-gap cutting mechanism of claim 9, wherein: the middle part of the cutting chopping board (4) is provided with at least one through long fastening hole (711), and a fastening screw (71) penetrates through the long fastening hole (711);

the outer end of the jacking screw (82) is located outside the side adjusting mounting plate (8), the inner end of the jacking screw (82) is in contact with the side portion of the cutting chopping board (4), and the tensioning screw (81) penetrates through the side adjusting mounting plate (8) to be mounted on the side portion of the cutting chopping board (4).

Technical Field

The invention relates to a cutting design of a photovoltaic solder strip, belongs to the technical field of material cutting, and particularly relates to a zero-clearance cutting mechanism.

Background

In the production and manufacturing process of the solar cell module, a single solar cell needs to be welded into a required length in series to manufacture a solar cell panel, and a welding strip with a specified length needs to be cut in the series welding process to realize welding, positive and negative interconnection between the cells.

Traditional blanking equipment all leaves certain clearance between cutter and cutter, cutter and the chopping block, and the photovoltaic solder strip is very thin tinned copper strips, and structural rigidity is weak, and great cutting clearance can lead to the incision burr to appear, influence size precision, can't cut smoothly even. Consequently, photovoltaic solder strip cuts and generally adopts very little clearance of cutting, and current photovoltaic solder strip cuts mechanism and mostly is very little positive clearance and cuts, and long-term work back cutter wearing and tearing need readjust to cut the clearance, simultaneously because the clearance undersize, the debugging process is complicated.

The information disclosed in this background section is only for enhancement of understanding of the general background of the patent application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

The invention aims to overcome the defects and problems that zero-clearance cutting cannot be realized and the cutting quality is poor in the prior art, and provides a zero-clearance cutting mechanism capable of realizing zero-clearance cutting and good in cutting quality.

In order to achieve the above purpose, the technical solution of the invention is as follows: a zero-gap cutting mechanism comprising:

a movable tool rest which can move along the up-down direction;

the welding strip cutter is elastically installed on one side of the movable tool rest through a transverse elastic piece and is provided with a blade section and a guide section formed by downwards extending from the bottoms of two ends of the blade section, an upper cutting edge is arranged at the bottom of the blade section and is positioned between the two guide sections, an inward extending guide inclined plane is arranged at the lower end of one side, facing the movable tool rest, of the guide section, and the welding strip cutter is provided with an initial position and a cutting position along the transverse direction;

the cutting chopping board can move in the up-down direction and is positioned below the welding strip cutter;

when the welding strip cutter is located at the initial position, the inward extending guide inclined plane is partially located right above the cutting chopping board, and when the welding strip cutter is located at the cutting position, the inward extending guide inclined plane is located on one side of the cutting chopping board.

And the connecting part of the inward extending guide inclined plane and the bottom surface of the guide section is chamfered into an external fillet.

The cutting chopping board is provided with an outer edge reverse guide fillet right below the two guide sections.

The transverse elastic piece is an elastic washer.

And a penetrating outer side screw hole is formed in the position, close to the top end, of the welding strip cutter, the outer side screw hole corresponds to an inner side screw hole formed in the movable cutter frame, the outer side screw hole and the inner side screw hole are in threaded fit with the same side step screw, one end of the side step screw is in contact with the side part of the welding strip cutter, and the other end of the side step screw sequentially penetrates through the metal gasket and the elastic gasket and then extends into the inner side screw hole.

The top of the movable tool rest is connected with the bottom end of the tool rest driving part through a floating connector, and the tool rest driving part drives the movable tool rest and the welding strip cutter to move up and down along the up-down direction.

And a pressing block and an elastic piece are arranged below the movable tool rest, the elastic piece is arranged between the pressing block and the movable tool rest and is used for compressing the elastic piece when the movable tool rest moves downwards and presses the pressing block, and the pressing block is elastically pressed on the welding strip.

The elastic piece is a compression spring, a step hole with a narrow top and a wide bottom is formed in the compression block, the step hole is provided with a step surface, a bottom step screw is arranged in the step hole, the head of the bottom step screw is clamped in the step hole and is abutted against the step surface to limit upward displacement of the bottom step screw, and the threaded portion of the bottom step screw is arranged at the bottom of the movable tool rest.

The cutting chopping board is connected with the top of a movable mounting plate positioned below the cutting chopping board through a fastening screw, the bottom of the movable mounting plate is connected with the top end of a chopping board driving piece, and the chopping board driving piece drives the movable mounting plate and the cutting chopping board to move up and down in the vertical direction;

the lateral part of the movable mounting plate is connected with the bottom of the side adjusting mounting plate, a tensioning screw and a jacking screw are arranged on the side adjusting mounting plate, and the tensioning screw penetrates through a tensioning spring and then is connected with the side adjusting mounting plate.

The middle part of the cutting chopping board is provided with at least one through fastening long hole, and a fastening screw passes through the fastening long hole;

the outer end of the jacking screw is located outside the side adjusting mounting plate, the inner end of the jacking screw is in contact with the side portion of the cutting chopping board, and the tensioning screw penetrates through the side adjusting mounting plate to be mounted on the side portion of the cutting chopping board.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the transverse elastic piece is arranged, the welding strip cutter is elastically arranged on one side of the movable tool rest, and the transverse elastic piece can still generate certain deformation when being tightly pressed and installed, so that the installation state of the welding strip cutter is an elastic installation state, namely, tiny swinging can be realized under the stress condition. When the welding strip cutter is located at the initial position, the inward extending guide inclined plane part is located right above the cutting chopping block, namely, in the cutting preparation stage, the cutting gap is a negative gap. During operation, the welding strip is positioned on the cutting chopping board, the movable tool rest moves downwards, the inward extending guide inclined plane is in pressure joint with the cutting chopping board and is guided by the inward extending guide inclined plane to enter a guide stage; after the guiding is finished, the welding strip cutter swings slightly relative to the initial position, is in an elastic installation state, starts to cut the welding strip, and enters a cutting starting stage; and after the welding strip cutter moves downwards to the proper position, cutting is finished, and the welding strip is cut off.

2. In the zero-clearance cutting mechanism, in a cutting preparation stage after installation, the relative position between the welding strip cutter and the cutting chopping board is a negative cutting clearance, and in a subsequent cutting starting stage, the relative position between the welding strip cutter and the cutting chopping board is a zero cutting clearance, and zero-clearance cutting is realized through structural guidance between the guide section and the cutting chopping board, so that the zero-clearance cutting mechanism is high in reliability, convenient to install and debug and low in adjustment frequency. Therefore, the invention can realize zero-clearance cutting and is easy to debug.

3. In the zero-clearance cutting mechanism, the upper side part of the welding strip cutter is connected with the movable cutter frame through the side step screw, and the side step screw is connected with the inner side screw hole in the movable cutter frame after sequentially passing through the metal gasket and the transverse elastic piece, wherein the transverse elastic piece is made of an easily deformable elastic material and can still generate certain deformation under the stress condition after being tightly pressed and installed, so that the welding strip cutter is in an elastic installation state and can realize micro-swing under the stress condition so as to be matched with the switching of the welding strip cutter from a negative clearance to a zero clearance. Therefore, the invention can realize the switching of the negative clearance cutting to the zero clearance cutting so as to improve the cutting quality.

4. In the zero-clearance cutting mechanism, the pressing block is arranged right below the movable tool rest and is connected with the bottom of the movable tool rest through the bottom step screw, the middle part of the bottom step screw is sleeved with the elastic piece, and when the zero-clearance cutting mechanism is applied, the welding strip is elastically pressed by the pressing block when cutting starts, so that the welding strip is prevented from moving or bouncing in the cutting process, and the cutting quality is ensured. Therefore, the invention has the function of pressing before cutting, and the cutting quality is higher.

Drawings

Fig. 1 is a schematic structural view of the present invention.

FIG. 2 is a side view of the welding strip cutter, cutting block of FIG. 1.

Fig. 3 is a schematic view of the connection of the moving blade carrier and the welding strip cutter in fig. 2.

Fig. 4 is a schematic view of the connection of the movable tool holder and the pressing block in fig. 2.

Figure 5 is a schematic view of the attachment of the cutting anvil, the anvil drive of figure 1.

FIG. 6 is a schematic view showing the combination of the cutting blade and cutting block of the present invention.

Fig. 7 is an enlarged schematic view at a in fig. 6.

Fig. 8 is a schematic diagram of the cutting process of the present invention.

In the figure: the cutting device comprises a knife rest driving piece 1, an anvil plate driving piece 2, a welding strip cutter 3, an upper cutting edge 31, a guide section 32, an inward extending guide inclined plane 33, a side outer screw hole 34, a knife edge section 35, a cutting anvil plate 4, a lower cutting edge 41, a guide round corner 42, a movable knife rest 5, a side inner screw hole 51, a side step screw 52, a metal gasket 521, a transverse elastic piece 522, a floating joint 53, a bottom screw hole 54, a spring hole 55, a pressing block 6, a pressing and adjusting gap 61, a step hole 62, a bottom step screw 63, an elastic piece 64, a step surface 65, a movable mounting plate 7, a fastening screw 71, a fastening long hole 711, a side adjusting mounting plate 8, a tensioning screw 81, a jacking screw 82, a tensioning spring 83, a guide shaft 9, an upper linear bearing 91 and a lower linear bearing 92.

Detailed Description

The present invention will be described in further detail with reference to the following description and embodiments in conjunction with the accompanying drawings.

Referring to fig. 1-8, a zero-gap cutting mechanism includes:

a movable tool rest 5 which can move in the up-down direction;

a welding strip cutter 3 elastically mounted to one side of the movable tool rest 5 by a transverse elastic member 522, wherein the welding strip cutter 3 has a blade section 35 and guide sections 32 formed by extending downward from bottoms of both ends of the blade section 35, the bottom of the blade section 35 has an upper cutting edge 31, the upper cutting edge 31 is located between the two guide sections 32, a lower end of one side of the guide section 32 facing the movable tool rest 5 has an inward extending guide inclined plane 33, and the welding strip cutter 3 has an initial position and a cutting position in the transverse direction;

the cutting chopping block 4 can move in the up-and-down direction and is positioned below the welding strip cutter 3;

when the welding strip cutter 3 is located at the initial position, the inward extending guide inclined plane 33 is partially located right above the cutting chopping board 4, and when the welding strip cutter 3 is located at the cutting position, the inward extending guide inclined plane 33 is located on one side of the cutting chopping board 4.

According to the invention, the transverse elastic piece 522 is arranged, the welding strip cutter 3 is elastically arranged on one side of the movable tool rest 5, and the transverse elastic piece 522 can still generate certain deformation when being tightly pressed and installed, so that the installation state of the welding strip cutter 3 is an elastic installation state, namely, tiny swinging can be realized under the condition of stress. Referring to fig. 8, when the welding strip cutter 3 is located at the initial position, the inward extending guiding inclined plane 33 is partially located right above the cutting anvil 4, i.e. the cutting gap is a negative gap in the cutting preparation stage. During operation, the welding strip is positioned on the cutting chopping board 4, the movable tool rest 5 moves downwards, the inward extending guide inclined plane 33 is in pressure joint with the cutting chopping board 4, and the welding strip enters a guide stage through the direction of the inward extending guide inclined plane 33; after the guiding is finished, the welding strip cutter 3 slightly swings at an angle relative to the initial position, the welding strip cutter 3 is in an elastic installation state, the welding strip is cut, and the cutting starting stage is started; and after the welding strip cutter 3 moves downwards to the proper position, the cutting is finished, and the welding strip is cut off.

The junction of the inwardly extending inclined guide surface 33 and the bottom surface of the guide section 32 is chamfered to reduce contact friction.

The outer edge of the cutting anvil 4 directly below the two guide sections 32 is chamfered to form a guide fillet 42.

The transverse resilient member 522 is a resilient washer, and in other embodiments, may be other flexible resilient materials. .

A penetrating side outer screw hole 34 is formed in a position, close to the top end, of the welding strip cutter 3, the side outer screw hole 34 corresponds to a side inner screw hole 51 formed in the movable cutter frame 5, the side outer screw hole 34 and the side inner screw hole 51 are in threaded fit with the same side step screw 52, one end of the side step screw 52 is in contact with the side portion of the welding strip cutter 3, and the other end of the side step screw 52 sequentially penetrates through a metal gasket 521 and a transverse elastic piece 522 and then extends into the side inner screw hole 51.

The top of the movable tool rest 5 is connected with the bottom end of the tool rest driving part 1 through the floating joint 53, and the tool rest driving part 1 drives the movable tool rest 5 and the welding strip cutter 3 to move up and down along the up-down direction. In this embodiment, the tool post driving member 1 is an air cylinder, and since the tool post driving member 1 drives the movable tool post 5 to have a large stroke, the floating joint 53 can effectively eliminate the non-parallelism between the extending direction of the air cylinder and other components (such as the guide shaft 9 described below), and prevent the tool post driving member 1 from being locked.

A pressing block 6 and an elastic piece 64 are arranged below the movable tool rest 5, the elastic piece 64 is arranged between the pressing block 6 and the movable tool rest 5 and used for compressing the elastic piece 64 when the movable tool rest 5 moves downwards and presses the pressing block 6, and the pressing block 6 is elastically pressed on a welding strip. Through the elastic crimping of compact heap 6 on the welding strip, can prevent that the welding strip from removing or bounce through applying elasticity back to the welding strip at the cutting in-process.

The elastic piece is a compression spring 64, a step hole 62 with a narrow top and a wide bottom is formed in the pressing block 6, the step hole 62 is provided with a step surface 65, a bottom step screw 63 is arranged in the step hole 62, the head of the bottom step screw 63 is clamped in the step hole 62 and is abutted against the step surface 65 to limit the upward displacement of the bottom step screw 63, and the threaded part of the bottom step screw 63 is arranged at the bottom of the movable tool rest 5. During the operation, the knife rest 5 moves downwards, when the compact heap 6 contacts with cutting chopping block 4 and continues to move downwards, the upper surface of the compact heap 6 upwards compresses the compression spring 64, the compression spring 64 compresses and exerts resilience force on the compact heap, so the welding strip on the cutting chopping block 4 is under downward elastic pressure, and the welding strip is effectively prevented from moving or bouncing up during the cutting process.

The cutting chopping board 4 is connected with the top of a movable mounting plate 7 positioned below the cutting chopping board 4 through a fastening screw 71, the bottom of the movable mounting plate 7 is connected with the top end of a chopping board driving piece 2, and the chopping board driving piece 2 drives the movable mounting plate 7 and the cutting chopping board 4 to move up and down in the vertical direction;

the side part of the movable mounting plate 7 is connected with the bottom part of the side adjusting mounting plate 8, a tensioning screw 81 and a jacking screw 82 are arranged on the side adjusting mounting plate 8, and the tensioning screw 81 penetrates through a tensioning spring 83 and then is connected with the side adjusting mounting plate 8.

The middle part of the cutting chopping board 4 is provided with at least one through long fastening hole 711, and a fastening screw 71 passes through the long fastening hole 711; the outer ends of the jacking screws 82 are located outside the side adjusting mounting plate 8, and the inner ends of the jacking screws 82 are in contact with the side portion of the cutting chopping board 4. The cutting anvil 4 is mounted to the mounting plate 8 through the fastening long hole 711 by the fastening screw 71, and the adjustment of the cutting gap can be achieved by adjusting the mounting position. In the present embodiment, the fastening long hole 711 is an oblong hole. The tensioning screw 81 passes through the side adjusting mounting plate 8 and is mounted on the side of the cutting chopping board 4, so that the cutting clearance can be slightly adjusted in a top pulling mode. Preferably, the tensioning screw 81 and the side-adjusting mounting plate 8 are provided with a spring.

The principle of the invention is illustrated as follows:

the tool rest driving part 1 and the chopping block driving part 2 can drive parts to move up and down along the up-and-down direction, and the tool rest driving part and the chopping block driving part comprise, but are not limited to, an air cylinder, a hydraulic cylinder or a lead screw combination.

The two ends of the movable tool rest 5 of the present invention can be respectively connected with the upper linear bearings 91, meanwhile, the two ends of the movable mounting plate 7 can be respectively connected with the lower linear bearings 92, the lower linear bearings 92 correspond to the upper linear bearings 91 one by one, and the upper linear bearings 91 and the lower linear bearings 92 can slide up and down along the same guide shaft 9.

The cutting chopping board 4 is symmetrically designed, the lower cutting edge 41 and the guide round angle 42 are machined on the two sides, when one side is worn after long-term use, the other side can be replaced for use, and the service life of parts is doubled.

Example 1:

referring to fig. 1-8, a zero-gap cutting mechanism includes:

a movable tool rest 5 which can move in the up-down direction;

a welding strip cutter 3 elastically mounted to one side of the movable tool rest 5 by a transverse elastic member 522, wherein the welding strip cutter 3 has a blade section 35 and guide sections 32 formed by extending downward from bottoms of both ends of the blade section 35, the bottom of the blade section 35 has an upper cutting edge 31, the upper cutting edge 31 is located between the two guide sections 32, a lower end of one side of the guide section 32 facing the movable tool rest 5 has an inward extending guide inclined plane 33, and the welding strip cutter 3 has an initial position and a cutting position in the transverse direction;

the cutting chopping block 4 can move in the up-and-down direction and is positioned below the welding strip cutter 3;

when the welding strip cutter 3 is located at the initial position, the inward extending guide inclined plane 33 is partially located right above the cutting chopping board 4, and when the welding strip cutter 3 is located at the cutting position, the inward extending guide inclined plane 33 is located on one side of the cutting chopping board 4.

A cutting process of the zero-clearance cutting mechanism comprises the following steps:

a cutting preparation stage: the welding strip to be cut is arranged between the welding strip cutter 3 and the cutting chopping block 4, the projection part of the inner extending guide inclined plane 33 in the up-down direction falls on the corresponding guide round angle 42, and at the moment, the relative position between the welding strip cutter 3 and the cutting chopping block 4 is a negative cutting clearance;

entering a guiding stage: in the up-and-down direction, the welding strip cutter 3 moves downwards, the cutting chopping block 4 moves upwards, the top surface of the cutting chopping block 4 stops moving after contacting with the welding strip to be cut, and the welding strip cutter 3 moves downwards until the inward extending guide inclined plane 33 contacts with the guide fillet 42;

a cutting starting stage: after the guiding is finished, the welding strip cutter 3 continues to move downwards until the upper cutting edge 31 is contacted with the lower cutting edge 41 to start cutting the welding strip, and at the moment, the relative position between the welding strip cutter 3 and the cutting chopping board 4 is zero cutting clearance;

and a cutting finishing stage: the welding strip cutter 3 continues to move downwards until the welding strip is cut off, and then the welding strip cutter 3 moves upwards to reset, and the cutting chopping block 4 moves downwards to reset.

Example 2:

the basic contents are the same as example 1, except that:

a penetrating side outer screw hole 34 is formed in a position, close to the top end, of the welding strip cutter 3, the side outer screw hole 34 corresponds to a side inner screw hole 51 formed in the movable cutter frame 5, the side outer screw hole 34 and the side inner screw hole 51 are in threaded fit with the same side step screw 52, one end of the side step screw 52 is in contact with the side portion of the welding strip cutter 3, and the other end of the side step screw 52 sequentially penetrates through a metal gasket 521 and a transverse elastic piece 522 and then extends into the side inner screw hole 51.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiment, but equivalent modifications or changes made by those skilled in the art according to the present disclosure should be included in the scope of the present invention as set forth in the appended claims.