Machining jig

Abstract

The invention provides a machining jig which comprises a conveying assembly, the conveying assembly comprises a movable carrier plate and a driving device, the movable carrier plate is configured to bear a steel belt, the machining jig comprises a length direction and a width direction, and the driving device is configured to drive the movable carrier plate to move in the length direction; the cutting assembly comprises an upper cutter and a lower cutter, and the upper cutter moves towards the lower cutter so as to cut the steel belt; projection of the cutting assembly and projection of the punching assembly at least partially coincide in the length direction of the machining jig, after the steel belt is cut, the conveying assembly moves the steel belt to the punching assembly, the punching assembly comprises a punching plate, a protection plate and a punching plate which are sequentially arranged from top to bottom, the punching plate drives the protection plate to move towards the punching plate, and the punching plate drives the protection plate to move towards the punching plate. Punching is carried out on the steel belt; the supporting assembly comprises a bottom plate, a vertical plate and a back plate, the vertical plate is perpendicular to the bottom plate and extends upwards, the back plate is fixedly connected with the end, away from the bottom plate, of the vertical plate, and the lower cutter and the punching plate are located on the bottom plate.

Description

Technical Field

[0001] This invention relates to the field of mechanical equipment, and in particular to a machining fixture for processing steel strips. Background Technology

[0002] In daily production, when punching steel strips is required, the steel strips must first be cut with a guillotine. After cutting, the steel strips are then punched using tools or by transporting them to a specific machine. The position of the steel strips also needs to be recalibrated during punching, which is time-consuming, labor-intensive, and has extremely low production efficiency.

[0003] Therefore, it is indeed necessary to provide a machining fixture to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a processing fixture for rapid cutting and punching of steel strips.

[0005] To achieve the above objectives, the present invention provides a processing fixture for punching and cutting steel strip, comprising a conveying assembly including a movable carrier plate and a driving device, the movable carrier plate being configured to carry the steel strip, the processing fixture having a length direction and a width direction, and the driving device being configured to drive the movable carrier plate to move along the length direction; a cutting assembly including an upper cutter and a lower cutter, the upper cutter moving toward the lower cutter to cut the steel strip; and a punching assembly, along the length direction of the processing fixture, the cutting assembly and the punching assembly... The projections at least partially overlap. After the steel strip is cut, the conveying assembly moves the steel strip to the punching assembly. The punching assembly includes a stamping plate, a protective plate, and a punching plate arranged sequentially from top to bottom. The stamping plate drives the protective plate to move toward the punching plate to punch holes in the steel strip. The support assembly includes a base plate, a vertical plate, and a back plate. The vertical plate is perpendicular to the base plate and extends upward. The back plate is fixedly connected to the end of the vertical plate away from the base plate. The lower cutter and the punching plate are located on the base plate.

[0006] As a further improvement of the present invention, the conveying assembly further includes a clamping device, which includes a clamping plate, a clamping plate bracket, and a clamping motor. The clamping plate is located on the side of the movable carrier plate away from the base plate, and the clamping motor is located on the side of the clamping plate away from the movable carrier plate. The clamping motor can drive the clamping plate to perform lifting and lowering movements. The clamping plate bracket is mounted on the movable carrier plate. The clamping device also includes a stamping plate guide post, which is perpendicular to the clamping plate. One end of the stamping plate guide post is fixedly connected to the clamping plate, and the other end passes through the clamping plate bracket and can slide relative to the clamping plate bracket.

[0007] As a further improvement of the present invention, the conveying assembly further includes a first guide rail arranged along the length direction, the movable carrier plate being slidably connected to the first guide rail, and a first lead screw arranged parallel to the first guide rail, a nut being sleeved on the first lead screw, the nut being fixedly connected to the movable carrier plate, and the nut being able to drive the movable carrier plate to slide relative to the first lead screw.

[0008] As a further improvement of the present invention, a synchronization device is provided at one end of the first lead screw along the length direction. The synchronization device includes a first synchronization wheel and a second synchronization wheel. The first synchronization wheel is sleeved on one end of the first lead screw, and the second synchronization wheel is connected to the first synchronization wheel by a synchronization belt.

[0009] As a further improvement of the present invention, the conveying assembly further includes a scale device, the processing fixture further includes a protective plate, the protective plate is fixedly connected to the back plate, the scale device includes a pointer plate and a scale ruler, the scale ruler is fixedly connected to the pressure plate bracket, the pointer plate is fixedly connected to the protective plate, and the position of the pointer plate relative to the punching plate remains unchanged at all times.

[0010] As a further improvement of the present invention, in the direction perpendicular to the base plate, the projections of the upper cutter and the lower cutter on the base plate do not coincide, and the side of the upper cutter facing the lower cutter is an inclined surface.

[0011] As a further improvement of the present invention, the cutting assembly includes a cutting cylinder, which is fixedly connected to the back plate and fixedly connected to the upper cutting blade via a cutting blade connecting plate. The cutting cylinder controls the upper cutting blade to move toward the lower cutting blade.

[0012] As a further improvement of the present invention, the support assembly includes three vertical plates arranged at equal intervals along the length of the processing fixture. The punching plate is fixedly connected to the base plate, and the stamping plate is slidably connected to two vertical plates near the synchronization device. The stamping plate can slide along the vertical plates.

[0013] As a further improvement of the present invention, the perforated plate is provided with a hole, and the stamping plate is provided with a main guide post protruding towards the perforated plate. The main guide post corresponds to the hole. When the stamping plate moves downward, the main guide post passes through the steel strip and inserts into the hole. Along the width direction of the processing fixture, the projection of the pointer plate coincides with the projection of the main guide post.

[0014] As a further improvement of the present invention, the punching assembly further includes an elbow pressure connecting plate, a bearing pressure block, and a punching cylinder. The punching cylinder is fixedly connected to the back plate. The bearing pressure block is located on both sides of the elbow pressure connecting plate. The upper end of the elbow pressure connecting plate is connected to the punching cylinder, and the lower end of the elbow pressure connecting plate is connected to the protective plate. The guide column passes through the elbow pressure connecting plate, and the upper end of the guide column is connected to the punching cylinder. The punching cylinder drives the guide column to move toward the steel strip, so that the guide column performs the punching operation on the steel strip.

[0015] In summary, the processing fixture of this invention integrates a punching component and a cutting component. After the steel strip is cut, it is transported to the punching component by a conveying component, enabling the cutting and punching operations of the steel strip to be completed in one go on the processing fixture, reducing intermediate transfer time and improving cycle efficiency. Simultaneously, the stamping plate applies force evenly through the protective plate. During punching, the protective plate absorbs impact force, preventing indentations on the steel strip surface, extending the punch life, and ensuring burr-free edges at the holes. The lower cutter and punching plate are fixed to the base plate, avoiding suspended components and reducing safety hazards caused by loosening. Attached Figure Description

[0016] The above-described technical content of the present invention and the following detailed embodiments will be better understood when read in conjunction with the accompanying drawings. It should be noted that the drawings are merely examples of the claimed technical solutions. In the drawings, the same reference numerals represent the same or similar elements.

[0017] Figure 1 This is a three-dimensional structural diagram of a processing fixture according to an embodiment of the present invention.

[0018] Figure 2 yes Figure 1 A magnified view of the circled area.

[0019] Figure 3 yes Figure 1 The three-dimensional structure diagram of the machining fixture shown is from another angle.

[0020] Figure 4 yes Figure 3 A magnified view of the circled area.

[0021] Figure 5 yes Figure 2 The diagram shows the three-dimensional structure of the machining fixture after the back plate has been removed.

[0022] Figure 6 yes Figure 1 The diagram shows the three-dimensional structure of the machining fixture on the right side.

[0023] The reference numerals in the attached figures are explained as follows: 100-Machining fixture, 110-Transmission assembly, 111-Moving carrier plate, 113-Clamping device, 1131-Clamping plate, 1132-Clamping motor, 1133-Clamping plate bracket, 1134-Punching plate guide post, 114-First guide rail, 115-First lead screw, 116-Nut, 117-Synchronizing device, 1171-First synchronous pulley, 1172-Second synchronous pulley, 1173-Synchronizing belt, 118-Scale device, 1181-Pointer plate, 1182-Scale ruler, 119-Slider, 120-Cutting assembly, 121-Upper cutter. 122-Lower cutter, 123-Cutting cylinder, 124-Cutter connecting plate, 130-Punching assembly, 131-Punching plate, 132-Protective plate, 133-Punching plate, 1331-Hole, 134-Elbow pressure connecting plate, 135-Bearing pressure block, 136-Main guide column, 137-Secondary guide column, 138-Punching cylinder, 140-Support assembly, 141-Base plate, 142-Vertical plate, 143-Back plate, 150-Protective plate, 160-Control assembly, 161-Pressure control device, 162-Cutting control device, 163-Punching control device. Detailed Implementation

[0024] The following detailed description of the features and advantages of the present invention is sufficient to enable those skilled in the art to understand the technical content of the present invention and to implement it accordingly. Furthermore, based on this specification, claims, and drawings, those skilled in the art can easily understand the related objectives and advantages of the present invention.

[0025] The terminology and expressions used herein are for descriptive purposes only, and the invention should not be limited to these terms and expressions. The use of these terms and expressions does not imply the exclusion of any illustrative and descriptive equivalents (or parts thereof), and it should be recognized that various modifications that may exist should also be included within the scope of the claims. Other modifications, variations, and substitutions may also exist. Accordingly, the claims should be considered to cover all such equivalents.

[0026] Please see Figures 1-6 As shown, a processing fixture 100 provided by the present invention includes a conveying assembly 110, a cutting assembly 120, a punching assembly 130, and a support assembly 140.

[0027] The conveying assembly 110 includes a movable carrier plate 111 and a driving device (not shown). The movable carrier plate 111 is configured to carry the steel strip to be processed. The processing fixture 100 includes a length direction and a width direction. The driving device is configured to drive the movable carrier plate 111 to move along the length direction to transport the steel strip on the processing fixture 100. The cutting assembly 120 includes an upper cutter 121 and a lower cutter 122. The upper cutter 121 moves toward the lower cutter 122 to quickly cut the steel strip. The steel strip has a clean cross-section. The punching assembly 130, along the length of the processing fixture 100, has at least partial overlap between the projections of the cutting assembly 120 and the punching assembly 130. After the steel strip is cut, the conveying assembly 110 moves the steel strip to the punching assembly 130. The punching assembly 130 includes a stamping plate 131, a protective plate 132, and a punching plate 133 arranged sequentially from top to bottom. The stamping plate 131 drives the protective plate 132 to move towards the punching plate 133 to punch holes in the steel strip. The support assembly 140 includes a base plate 141, a vertical plate, and a back plate 143. The vertical plate 142 is perpendicular to the base plate 141 and extends upwards. The back plate 143 is fixedly connected to the end of the vertical plate away from the base plate 141. The lower cutter 122 and the punching plate 133 are located on the base plate 141.

[0028] By cooperating with the cutting assembly 120, conveying assembly 110, and punching assembly 130, the steel strip can be directly conveyed by the conveying assembly 110 along the length of the processing fixture 100 to the punching assembly 130 without lateral movement after cutting. This allows the steel strip to be cut and punched in one operation on the processing fixture 100, reducing intermediate transfer time and improving cycle efficiency. Simultaneously, the punching plate 131 applies force evenly through the protective plate 132. During punching, the protective plate 132 absorbs impact force, preventing indentations on the steel strip surface, extending punch life, and ensuring burr-free edges at the holes. The lower cutter 122 and punching plate 133 are fixed to the base plate 141, preventing suspended components and reducing safety hazards caused by loosening.

[0029] Furthermore, in this embodiment, the conveying assembly 110 also includes a first guide rail 114 arranged along the length direction, a movable carrier plate 111 slidably connected to the first guide rail 114, and a first lead screw 115 arranged parallel to the first guide rail 114. A nut 116 is sleeved on the first lead screw 115, and the nut 116 is fixedly connected to the movable carrier plate 111. The nut 116 can drive the movable carrier plate 111 to slide relative to the first lead screw 115. By driving the first lead screw 115 to rotate, the nut 116 slides along the first lead screw 115, and the nut 116 drives the movable carrier plate 111 to slide along the first guide rail 114. That is, the movable carrier plate 111 slides along the length direction of the processing fixture 100. Through the cooperation of the first lead screw 115, the nut 116, the slider 119, and the first guide rail 114, the movable carrier plate 111 can slide smoothly and steadily along the length direction of the processing fixture 100, with less wobbling during sliding.

[0030] Furthermore, in this embodiment, a synchronization device 117 is provided at one end of the first lead screw 115 along its length. The synchronization device 117 includes a first synchronization wheel 1171 and a second synchronization wheel 1172. The first synchronization wheel 1171 is sleeved on one end of the first lead screw 115, and the second synchronization wheel 1172 is connected to the first synchronization wheel 1171 via a synchronization belt 1173. Using the synchronization device 117, when an external drive device is connected, the second synchronization wheel 1172 can drive the first synchronization wheel 1171 to rotate, thereby driving the first lead screw 115 to rotate. The drive nut 116 drives the movable carrier plate 111 to move. In addition, the external drive device can be arranged on the outside or bottom of the processing fixture 100, saving axial space at the end of the first lead screw 115 and avoiding interference with the cutting / punching station.

[0031] Furthermore, the conveying assembly 110 also includes a clamping device 113, which includes a clamping plate 1131, a clamping plate bracket 1133, and a clamping motor 1132. The clamping plate 1131 is located on the side of the movable carrier plate 111 away from the base plate 141, and the clamping motor 1132 is located on the side of the clamping plate 1131 away from the movable carrier plate 111. The clamping plate bracket 1133 is mounted on the movable carrier plate 111. The clamping device 113 also includes a stamping plate guide post 1134. The column 1134 is perpendicular to the pressure plate 1131. One end of the stamping plate guide column 1134 is fixedly connected to the pressure plate 1131, and the other end passes through the pressure plate bracket 1133 and can slide relative to the pressure plate bracket 1133. The pressure motor 1132 can drive the pressure plate 1131 to move up and down. With the stamping plate guide column 1134, the pressure plate 1131 will not deviate in the horizontal direction when it moves up and down in the vertical direction, which improves the stability of the pressure device 113 during operation.

[0032] Furthermore, in this embodiment, the conveying assembly 110 also includes a scale device 118, which includes a pointer plate 1181 and a scale 1182. The processing fixture 100 also includes a protective plate 150, which is fixedly connected to the back plate 143 and covers some components of the processing fixture 100. The scale 1182 is fixedly connected to the pressure plate bracket 1133, and the pointer plate 1181 is fixedly connected to the protective plate 150. In this way, the position of the pointer plate 1181 relative to the punching plate 133 remains unchanged. The operator only needs to align the target scale line on the scale 1182 with the pointer plate 1181 to locate the punching position of the steel strip with zero error, without repeated trial punching or the use of additional measuring tools. This is faster and more efficient when punching multiple positions on the steel plate is required.

[0033] Furthermore, in the direction perpendicular to the base plate 141, the projections of the upper cutter 121 and the lower cutter 122 on the base plate 141 do not coincide. The side of the upper cutter facing the lower cutter is an inclined surface, that is, the lateral staggered cutter forms a scissor-like shearing. The upper cutter 121 cuts obliquely into the steel strip, and the shearing force is gradually released. The collapse angle and burrs of the steel strip cross section are significantly reduced, which is especially effective for thin steel strips below 0.3mm. At the same time, the cutting edge of the upper cutter 121 does not contact the steel strip at the same time, and the cutting load per unit length is reduced. The measured life of the same material blade can be extended by 1.5 to 2 times, reducing the probability of tool change downtime.

[0034] Furthermore, in this embodiment, the cutting assembly 120 includes a cutting cylinder 123, which is fixedly connected to the back plate 143. The cutting cylinder 123 is fixedly connected to the upper cutter via a cutter connecting plate 124, and controls the upper cutter to move downwards. Through the cutting cylinder 123, the speed and distance of the upper cutter's downward movement can be precisely controlled, resulting in more precise control of the cutting process.

[0035] Furthermore, the support assembly 140 includes three vertical plates 142 arranged at equal intervals along the length of the processing fixture 100. The punching plate 133 is fixedly connected to the base plate 141, and the stamping plate 131 is slidably connected to the two vertical plates 142 near the synchronization device 117. The stamping plate 131 can slide along the vertical plates 142 and slide downward along the vertical plates 142. In this way, during the punching process of the steel plate, the stamping plate 131 can maintain horizontal stability and will not shake.

[0036] Furthermore, in this embodiment, the perforated plate 133 has a hole 1331, and the stamping plate 131 has a main guide post 136 protruding towards the perforated plate 133. The main guide post 136 corresponds to the hole 1331. When the stamping plate 131 moves downward, the main guide post 136 passes through the steel strip and inserts into the hole 1331. Along the width direction of the processing fixture 100, the projection of the pointer plate 1181 coincides with the projection of the main guide post 136. The steel strip is completely constrained in the width direction of the processing fixture 100, and the hole 1331 coincides with the center of the main guide post 136. The projection of the pointer plate 1181 coincides with the projection of the main guide post 136, and the zero position of the scale 1182 can be directly aligned with the center line of the main guide post 136 without the need for an additional side stop gauge. When changing steel strips of different widths, only the perforated plate 133 needs to be replaced as a whole (the position of the hole 1331 moves accordingly), and the main guide post 136 always matches the hole 1331; the pointer plate 1181 is fixed directly above the main guide post 136, and the zero position automatically follows, without the need to recalibrate the scale 1182.

[0037] Furthermore, in this embodiment, the punching assembly 130 also includes a punching cylinder 138, which is fixedly connected to the back plate 143. The punching assembly 130 also includes an elbow-pressing connecting plate 134 and a bearing pressure block 135. The bearing pressure block 135 is located on both sides of the elbow-pressing connecting plate 134. The upper end of the elbow-pressing connecting plate 134 is connected to the punching cylinder 138, and the lower end is connected to the protective plate 132. The main guide column 136 passes through the elbow-pressing connecting plate 134, and the upper end of the main guide column 136 is connected to the punching cylinder 138. The punching cylinder 138 drives the main guide column 136 to move toward the steel strip, so that the main guide column 136 performs punching operations on the steel strip. The linear thrust of the punching cylinder 138 is transmitted to the lower protective plate 132 "rigidly and without clearance". At the same time, the elbow-pressing connecting plate 134 itself also serves as a guide seat, allowing the main guide column 136 to pass through it, ensuring that the main guide column 136 and the hole 1331 are always coaxial. Together with the main guide column 136, it forms a "double-sided sliding bearing" that not only bears the lateral reaction force but also absorbs the lateral bending moment during punching, preventing unilateral wear of the main guide column.

[0038] Furthermore, the punching assembly 130 also includes a secondary guide post 137. One end of the secondary guide post 137 is fixedly connected to the protective plate 132. The secondary guide post 137 passes through the stamping plate 131 and the bearing pressure block 135. Each bearing pressure block 135 passes through two secondary guide posts 137. By setting the secondary guide post 137, the stamping plate 131 can be prevented from shifting in the horizontal direction when it moves in the vertical direction.

[0039] Furthermore, a protective plate 150 covers the cutting cylinder 123 and the punching cylinder 138 to protect these components. The processing fixture 100 also includes a control assembly 160, which includes a clamping control device 161, a cutting control device 162, and a punching control device 163. The clamping control device 161 is electrically connected to the clamping motor 1132, the cutting control device 162 is electrically connected to the cutting cylinder 123, and the punching control device 163 is electrically connected to the punching cylinder 138. Each control device controls the corresponding cylinder or motor.

[0040] In summary, in this invention, the processing fixture 100 integrates a punching assembly 130 and a cutting assembly 120. After the steel strip is cut, it is transported to the punching assembly 130 by the conveying assembly 110. The cutting and punching operations of the steel strip can be completed in one go on the processing fixture 100, reducing intermediate transfer time and improving cycle efficiency. At the same time, the stamping plate 131 applies force evenly through the protective plate 132. During punching, the protective plate 132 can absorb the impact force, prevent indentation on the surface of the steel strip, extend the life of the punch, and make the edges of the hole burr-free. The lower cutter 122 and the punching plate 133 are fixed on the base plate 141 to avoid suspended parts and reduce safety hazards caused by loosening.

[0041] Similarly, it should be noted that although the present invention has been described with reference to the specific embodiments described above, those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and various equivalent changes or substitutions can be made without departing from the spirit of the present invention. Therefore, any changes or modifications to the above embodiments within the scope of the essential spirit of the present invention will fall within the scope of the claims of the present invention.

Claims

1. A processing fixture for punching and cutting steel strip, characterized in that, include A conveying assembly includes a movable carrier plate and a driving device, the movable carrier plate being configured to carry the steel strip, and the processing fixture including a length direction and a width direction, the driving device being configured to drive the movable carrier plate to move along the length direction; A cutting assembly includes an upper cutter and a lower cutter, the upper cutter moving toward the lower cutter to cut the steel strip; The punching assembly has at least partial overlap between the projections of the cutting assembly and the punching assembly along the length of the processing fixture. After the steel strip is cut, the conveying assembly moves the steel strip to the punching assembly. The punching assembly includes a stamping plate, a protective plate, and a punching plate arranged sequentially from top to bottom. The stamping plate drives the protective plate to move toward the punching plate to punch holes in the steel strip. The support assembly includes a base plate, a vertical plate, and a back plate. The vertical plate is perpendicular to the base plate and extends upward. The back plate is fixedly connected to the end of the vertical plate away from the base plate. The lower cutter and the punching plate are located on the base plate.

2. The machining fixture according to claim 1, characterized in that, The conveying assembly further includes a clamping device, which includes a clamping plate, a clamping plate bracket, and a clamping motor. The clamping plate is located on the side of the movable carrier plate away from the base plate, and the clamping motor is located on the side of the clamping plate away from the movable carrier plate. The clamping motor can drive the clamping plate to perform lifting and lowering movements. The clamping plate bracket is mounted on the movable carrier plate. The clamping device also includes a stamping plate guide post, which is perpendicular to the clamping plate. One end of the stamping plate guide post is fixedly connected to the clamping plate, and the other end passes through the clamping plate bracket and can slide relative to the clamping plate bracket.

3. The machining fixture according to claim 2, characterized in that, The conveying assembly further includes a first guide rail arranged along the length direction, the movable carrier plate being slidably connected to the first guide rail, and a first lead screw arranged parallel to the first guide rail. A nut is sleeved on the first lead screw, the nut being fixedly connected to the movable carrier plate, and the nut being able to drive the movable carrier plate to slide relative to the first lead screw.

4. The machining fixture according to claim 3, characterized in that, Along the length direction, a synchronization device is provided at one end of the first lead screw. The synchronization device includes a first synchronization wheel and a second synchronization wheel. The first synchronization wheel is sleeved on one end of the first lead screw, and the second synchronization wheel is connected to the first synchronization wheel by a synchronization belt.

5. The machining fixture according to claim 4, characterized in that, The conveying assembly also includes a scale device, and the processing fixture also includes a protective plate. The protective plate is fixedly connected to the back plate. The scale device includes a pointer plate and a scale ruler. The scale ruler is fixedly connected to the pressure plate bracket, and the pointer plate is fixedly connected to the protective plate. The position of the pointer plate relative to the punching plate remains unchanged.

6. The machining fixture according to claim 1, characterized in that, In the direction perpendicular to the base plate, the projections of the upper cutter and the lower cutter on the base plate do not coincide, and the side of the upper cutter facing the lower cutter is an inclined surface.

7. The machining fixture according to claim 1, characterized in that, The cutting assembly includes a cutting cylinder, which is fixedly connected to the back plate. The cutting cylinder is fixedly connected to the upper cutting blade through a cutting blade connecting plate. The cutting cylinder controls the upper cutting blade to move towards the lower cutting blade.

8. The machining fixture according to claim 5, characterized in that, The support assembly includes three vertical plates arranged at equal intervals along the length of the processing fixture. The punching plate is fixedly connected to the base plate, and the stamping plate is slidably connected to two vertical plates near the synchronization device. The stamping plate can slide along the vertical plates.

9. The machining fixture according to claim 8, characterized in that, The perforated plate has a hole, and the stamping plate has a main guide post protruding towards the perforated plate. The main guide post corresponds to the hole. When the stamping plate moves downward, the main guide post passes through the steel strip and inserts into the hole. Along the width direction of the processing fixture, the projection of the pointer plate coincides with the projection of the main guide post.

10. The machining fixture according to claim 9, characterized in that, The punching assembly further includes an elbow-pressure connecting plate, a bearing pressure block, and a punching cylinder. The punching cylinder is fixedly connected to the back plate. The bearing pressure block is located on both sides of the elbow-pressure connecting plate. The upper end of the elbow-pressure connecting plate is connected to the punching cylinder, and the lower end of the elbow-pressure connecting plate is connected to the protective plate. The guide column passes through the elbow-pressure connecting plate, and the upper end of the guide column is connected to the punching cylinder. The punching cylinder drives the guide column to move toward the steel strip, so that the guide column performs the punching operation on the steel strip.

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