Steel plate shearing device

Abstract

The invention provides a steel plate shearing device, and relates to the field of plate shearing, the steel plate shearing device comprises a workbench, a detachable bracket is mounted at the edge position of the front side of the workbench, and a positioning storage groove is formed in the front side of the workbench; a servo motor is installed on the right side of the positioning storage groove, a threaded rod is installed on the inner side of the positioning storage groove, the top of the positioning storage groove is located on the top of the workbench, the bottom of the positioning storage groove is of an inclined structure, and guide sliding grooves are formed in the two sides of the positioning storage groove; a guide side groove is formed in the rear side of the workbench; the overturning plate and the expansion plate are used for lifting and supporting a sheared plate, the cutting flatness of the steel plate is guaranteed, the shearing precision of the plate is guaranteed, and the problem that when an existing shearing device is used for shearing the steel plate, the shearing efficiency is high is solved. And due to the support of the lower blade and the dead weight of the plate, the marked part is easy to bulge, so that the cut side plate has larger error.

Description

Technical Field

[0001] The invention relates to the technical field of plate shearing, in particular to a steel plate shearing device. Background Art

[0002] Steel plates are often used in the process of processing automobile parts. Steel plates refer to flat plates made of steel. Steel plates are usually large in area. Shearing devices are needed to cut the plates into suitable sizes to facilitate the subsequent processing of automobile parts such as stamping and welding. Steel plates are processed into automobile parts and have the advantages of high strength, wear resistance, corrosion resistance, and high temperature resistance. When the existing shearing device shears the steel plate, a large part of the plate is placed under the upper blade of the shearing device, and a large part of the plate protrudes out of the shearing device and is at the rear. The bottom of the plate is placed on the lower blade of the shearing device. Due to the support of the lower blade and the deadweight of the plate, the part of the line mark is easily raised. When the upper blade is pressed to cut during shearing, the raised part is displaced, thereby moving the position of the mark, resulting in a large error in the cutting of the rear plate, which affects the subsequent processing of automobile parts. Summary of the invention

[0003] In view of this, the present invention provides a steel plate shearing device to solve the problem that when the existing shearing device is shearing the steel plate, the bottom of the plate is placed on the lower blade of the shearing device. Due to the support of the lower blade and the weight of the plate, the marked part is easily raised. When shearing, the upper blade presses to cut, causing the raised part to be displaced, thereby moving the marked position, resulting in a large error in cutting the rear plate, affecting the subsequent processing of automobile parts.

[0004] The present invention provides a steel plate shearing device, specifically comprising a workbench, a detachable bracket is installed at the front edge of the workbench, and the workbench includes a hydraulic shearing module on the top, and a positioning tank is opened on the front side of the workbench; a servo motor is installed on the right side of the positioning tank, and a threaded rod is installed on the inner side of the positioning tank, and the top of the positioning tank is at the top of the workbench, and the bottom of the positioning tank is an inclined structure, and guide grooves are opened on both sides of the positioning tank; a guide side groove is provided on the rear side of the workbench; the guide side groove is a T-shaped structure, and an adjusting screw is rotatably installed inside the guide side groove, wherein both ends of the adjusting screw are rotatably installed on the left and right sides of the workbench.

[0005] Furthermore, two rotating transmission wheels are rotatably installed at the rear bottom of the workbench, and the two ends of the two rotating transmission wheels pass through the side of the workbench and are connected by pulleys; a supporting carrier is also installed at the rear bottom of the workbench; the supporting carrier is located between the two rotating transmission wheels.

[0006] Furthermore, a steel wire rope core conveyor belt is rotatably installed on the outer sides of the two rotating transmission wheels; the steel wire rope core conveyor belt is also rotatably installed on the top of the supporting carrier plate; a rotating drive rod is rotatably installed on the left side of the workbench; the rotating drive rod is a cylindrical structure, and the outer side of the rotating drive rod is connected to one end of the rotating transmission wheel at the rear side through a pulley, wherein the pulley diameter on the rotating drive rod is larger than the pulley diameter on the outer side of one end of a rotating transmission wheel.

[0007] Furthermore, the two ends of the adjusting slide are slidably installed inside the guide slide groove; the adjusting slide is a rectangular plate structure, and the two adjusting slides are installed on the threaded rod on the inner side of the positioning storage tank, and the tops of the two adjusting slides are rotatably connected with the bottom of the support plate through a rotating shaft; the tops of the two support plates are installed with positioning support plates through rotating shafts.

[0008] Furthermore, a rotating transmission rod is rotatably installed in the middle position of the positioning support plate; the rotating transmission rod is a cylindrical structure, and a cross-shaped slot is provided at the right end of the rotating transmission rod; a positioning card plate is installed on the output end of the servo motor on the right side of the positioning storage tank; the positioning card plate is a rectangular plate structure, and the positioning card plate is slidably installed in the cross-shaped slot at the right end of the rotating transmission rod.

[0009] Furthermore, a positioning support rod is installed on the outer side of the rotating transmission rod; a positioning groove is provided at the outer end of the positioning support rod, and the inner end of the movable rod is slidably installed inside the positioning groove; a spring is installed on the outer ring sleeve of the movable rod, and the spring on the outer side of the movable rod is connected to the outer end of the positioning support rod, and a push plate is installed on the outer end of the movable rod; wherein the push plate is an arc-shaped structure, and a rubber block is provided on the outer side of the push plate.

[0010] Furthermore, an adjusting movable plate is slidably installed on the inner side of the guide side groove; the adjusting movable plate is a rectangular plate structure, and the adjusting movable plate is also installed on the outer side of the adjusting screw, and a movable support plate is installed on the outer side of the adjusting movable plate through a rotating shaft.

[0011] Furthermore, the side ends of the two movable support plates are connected to the two sides of the center plate through a rotating shaft; the top of the center plate is an inclined structure, and the center plate is slidably installed in the middle position of the guide side groove, and a push-down plate is installed on the outer side of the center plate, and the push-down plate is a rectangular structure.

[0012] Furthermore, an upper push plate is installed on the top of the center plate; a flip plate is installed on the top of the rear side of the workbench through a rotating shaft; a groove is provided on the side of the flip plate, and the flip plate is also installed on the outside of the lower push plate and the upper push plate, and an expansion plate is installed on the side of the flip plate through a spring.

[0013] Furthermore, a card block is provided on the inner side of the expansion plate, and an upward push plate is slidably installed on the inner side of the expansion plate, and a guide movable plate is installed on the top of the expansion plate; a protrusion is provided on the side end of the guide movable plate, and the side end of the guide movable plate is slidably installed in the groove on the side of the flip plate.

[0014] The steel plate shearing device provided by the present invention has the following beneficial effects:

[0015] 1. By using the flip plate and the expansion plate to support the cut plate, the flatness of the steel plate cutting is ensured. When the steel plate is cut according to the size of the automotive parts for processing, if the cut plate is large, the flip plate and the expansion plate are rotated on the top of the rear side of the workbench to keep the flip plate and the expansion plate in a horizontal position to support the plate to be cut, so that the plate will not bulge due to its own weight, and the marked cutting part is directly below the blade on the hydraulic shear module to ensure the accuracy of plate cutting, eliminate the error caused by the movement of the marked part of the plate, make the plate in a suitable size after cutting, and ensure the uniformity of the batch processing size of automotive parts.

[0016] 2. By using a push plate to push heavier steel plates to move, when cutting steel plates according to the size of automotive parts for processing, the rotating transmission rod drives the push plate to move upward slightly higher than the top of the workbench. When the heavier plate is sheared on the workbench, the push plate pushes the steel plate to move gradually, so that the marked part on the plate is accurately aligned with the blade on the shearing device. The operation is convenient and accurate, and there is no need for workers to move the plate to adjust the position, which reduces the workload of workers and greatly improves the efficiency of plate shearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0018] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0019] In the attached picture:

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention.

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of a workbench according to an embodiment of the present invention.

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the adjusting slide plate according to an embodiment of the present invention.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the rotating transmission rod of an embodiment of the present invention.

[0024] Figure 5 It is a schematic diagram of the cross-sectional structure of a positioning support rod according to an embodiment of the present invention.

[0025] Figure 6 It is a schematic diagram of the folding state of the flip plate of an embodiment of the present invention.

[0026] Figure 7 It is a schematic diagram of the expansion board in the expanded state according to an embodiment of the present invention.

[0027] Figure 8 It is a schematic diagram of the three-dimensional structure of the center plate of an embodiment of the present invention.

[0028] Reference numerals list

[0029] 1. Workbench; 101. Hydraulic shearing module; 102. Rotating transmission wheel; 103. Support carrier plate; 104. Steel wire rope core conveyor belt; 105. Rotating driving rod;

[0030] 2. Positioning storage tank; 201. Guide slide; 202. Adjusting slide; 203. Support plate; 204. Positioning support plate; 205. Rotating transmission rod; 206. Positioning card plate; 207. Positioning support rod; 208. Movable rod; 209. Pushing plate;

[0031] 3. Guide side groove; 301. Adjustment screw; 302. Adjustment movable plate; 303. Movable support plate; 304. Center plate; 305. Push down plate; 306. Push up plate; 307. Flip plate; 308. Expansion plate; 309. Guide movable plate. DETAILED DESCRIPTION

[0032] In order to make the purpose, scheme and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention.

[0033] Please refer to Figures 1 to 8 As shown:

[0034] Embodiment 1: The present invention provides a steel plate shearing device, comprising a workbench 1, a detachable bracket is installed at the front edge of the workbench 1, and the workbench 1 includes a hydraulic shearing module 101 at the top; two rotating transmission wheels 102 are rotatably installed at the rear bottom of the workbench 1, and the two ends of the two rotating transmission wheels 102 pass through the side of the workbench 1 and are connected by a pulley; a supporting carrier 103 is also installed at the rear bottom of the workbench 1; the supporting carrier 103 is located between the two rotating transmission wheels 102; the outer sides of the two rotating transmission wheels 102 A steel wire core conveyor belt 104 is rotatably installed; the steel wire core conveyor belt 104 is also rotatably installed on the top of the support carrier plate 103; a rotating drive rod 105 is rotatably installed on the left side of the workbench 1; the rotating drive rod 105 is a cylindrical structure, and the outer side of the rotating drive rod 105 is connected to one end of the rotating transmission wheel 102 at the rear side through a pulley, wherein the pulley diameter on the rotating drive rod 105 is larger than the pulley diameter on the outer side of one end of the rotating transmission wheel 102. When cutting steel plates according to the size of automobile parts for processing, According to the size of the plate, whether a bracket is installed at the front edge of the workbench 1, the bracket can lift the longer steel plate. When the hydraulic shearing module 101 on the top of the workbench 1 drives the upper blade to shear, the sheared plate falls on the steel wire core conveyor belt 104, and the support carrier 103 is lifted on the inner side of the steel wire core conveyor belt 104 to prevent the fallen plate from causing deformation of the steel wire core conveyor belt 104 and ensure the flatness of the top of the steel wire core conveyor belt 104. The rotating drive rod 105 is rotated on the left side of the workbench 1 to rotate The rotating driving rod 105 drives one end of a rotating transmission wheel 102 to rotate through a pulley. The pulley on the rotating driving rod 105 has a larger diameter, so that the rotation speed of the rotating transmission wheel 102 is increased. The rotating transmission wheel 102 drives another rotating transmission wheel 102 to rotate through the pulley. The rotating transmission wheel 102 drives the outer steel wire core conveyor belt 104 to move, so that the steel wire core conveyor belt 104 brings out the cut plates, preventing the staff from leaning over to pick up and causing a head collision or other people from accidentally getting injured when using it.

[0035] Embodiment 2: The present invention provides a steel plate shearing device, which also includes a positioning tank 2 on the front side of the workbench 1; a servo motor is installed on the right side of the positioning tank 2, and a threaded rod is installed on the inner side of the positioning tank 2, and the top of the positioning tank 2 is at the top of the workbench 1, and the bottom of the positioning tank 2 is an inclined structure, and guide grooves 201 are opened on both sides of the positioning tank 2; the two ends of the adjusting slide 202 are slidably installed inside the guide groove 201; the adjusting slide 202 is a rectangular plate structure, and the two adjusting slides 202 are installed on the threaded rod inside the positioning tank 2, and the tops of the two adjusting slides 202 are rotatably connected with the bottom of the support plate 203 through a rotating shaft; the tops of the two support plates 203 are installed with positioning support plates 204 through a rotating shaft; the positioning A rotating transmission rod 205 is rotatably installed in the middle position of the support plate 204; the rotating transmission rod 205 is a cylindrical structure, and a cross-shaped slot is provided at the right end of the rotating transmission rod 205; a positioning card plate 206 is installed on the output end of the servo motor on the right side of the positioning storage tank 2; the positioning card plate 206 is a rectangular plate structure, and the positioning card plate 206 is slidably installed in the cross-shaped slot at the right end of the rotating transmission rod 205; a positioning support rod 207 is installed on the outer side of the rotating transmission rod 205; a positioning groove is provided at the outer end of the positioning support rod 207, and the inner end of the movable rod 208 is slidably installed inside the positioning groove; a spring is installed on the outer ring sleeve of the movable rod 208, and the spring on the outer side of the movable rod 208 is connected to the outer end of the positioning support rod 207, and a push plate 209 is installed on the outer end of the movable rod 208;Among them, the pushing plate 209 is an arc-shaped structure, and a rubber block is arranged on the outer side of the pushing plate 209. When the steel plate is cut for processing according to the size of the automobile parts, for the smaller plate, the rotating transmission rod 205 drives the pushing plate 209 to be in the positioning storage tank 2 to ensure the flatness of the top of the workbench 1. When cutting the larger steel plate, the threaded rods on the two adjusting slides 202 are rotated inside the positioning storage tank 2, so that the threaded rods drive the two ends of the two adjusting slides 202 to move along the guide slide groove 201, and then the top of the adjusting slide 202 drives the positioning support plate 204 to move upward through the support plate 203, so that the positioning support plate 204 drives the rotating transmission rod 205 to move upward, so that the positioning card plate 206 at the output end of the servo motor on the right side of the positioning storage tank 2 is slidably installed in the cross-shaped slot on the right end of the rotating transmission rod 205, and The rotating transmission rod 205 drives the push plate 209 to be higher than the top of the workbench 1. When the steel plate is placed on the top of the workbench 1, the weight of the plate presses the push plate 209 to drive the movable rod 208 to move in the positioning groove at the outer end of the positioning support rod 207. Under the action of the spring outside the movable rod 208, the push plate 209 applies a thrust to the bottom of the plate. The positioning card plate 206 at the output end of the servo motor on the right side of the positioning tank 2 drives the rotating transmission rod 205 to rotate, so that the push plate 209 moves at the bottom of the plate. The rubber block outside the push plate 209 increases the frictional force of contact with the plate, so that the rotating push plate 209 gradually pushes the steel plate to move, so that the plate is stably moved to the bottom of the blade for shearing, reducing the workload of manual handling of the plate, making the plate movement more accurate, and making the plate cutting position accuracy higher. ;

[0036] Embodiment 3: The present invention provides a steel plate shearing device, which also includes a guide side groove 3 provided on the rear side of the workbench 1; the guide side groove 3 is a T-shaped structure, and an adjusting screw 301 is rotatably installed inside the guide side groove 3, wherein the two ends of the adjusting screw 301 are rotatably installed on the left and right sides of the workbench 1; an adjusting movable plate 302 is slidably installed on the inner side of the guide side groove 3; the adjusting movable plate 302 is a rectangular plate structure, and the adjusting movable plate 302 is also installed on the outer side of the adjusting screw 301, and a movable support plate 303 is installed on the outer side of the adjusting movable plate 302 through a rotating shaft; the side ends of the two movable support plates 303 are connected to the two sides of the center plate 304 through a rotating shaft; the top of the center plate 304 is The inclined structure, and the center plate 304 is slidably installed in the middle position of the guide side groove 3, and the outer side of the center plate 304 is installed with a lower push plate 305, and the lower push plate 305 is a rectangular structure; the top of the center plate 304 is installed with an upper push plate 306; the top of the rear side of the workbench 1 is installed with a flip plate 307 through a rotating shaft; the side of the flip plate 307 is provided with a groove, and the flip plate 307 is also installed on the outer side of the lower push plate 305 and the upper push plate 306, and the side of the flip plate 307 is installed with an expansion plate 308 through a spring; the inner side of the expansion plate 308 is provided with a card block, and the inner side of the expansion plate 308 is slidably installed with an upper push plate 306, and the top of the expansion plate 308 is installed with a guide movable plate 309;The side end of the guide movable plate 309 is provided with a protrusion, and the side end of the guide movable plate 309 is slidably installed in the groove on the side of the flip plate 307. When cutting the steel plate for processing according to the size of the automobile parts, when shearing a smaller plate, the flip plate 307 is folded at the rear side of the workbench 1, and the sheared plate falls directly on the wire rope core conveyor belt 104. When shearing a longer plate, the adjusting screw 301 in the guide side groove 3 is rotated on either side of the workbench 1, so that the adjusting screw 301 drives the adjusting movable plate 302 to move inside the guide side groove 3. The two adjusting movable plates 302 move relative to each other through the movable support plate 303 to drive the center plate 304 to move, and the outer bottom of the center plate 304 drives the push-down plate 305 to push the flip plate 307 to move, so that the flip plate 307 moves upward at the rear side of the workbench 1. The center plate 304 rotates, and the tilted rotation of the top will push the gradually upwardly rotating flip plate 307 to move, so that the upper push plate 306 on the top of the center plate 304 pushes the flip plate 307 to rotate upward and then becomes horizontal. The upper push plate 306 is engaged with the block installed on the inner side of the expansion plate 308 under the drive of the center plate 304, so that the upper push plate 306 drives the expansion plate 308 to move, so that the spring between the expansion plate 308 and the flip plate 307 is stretched, so that the expansion plate 308 drives the guide movable plate 309 to move in the groove on the side of the flip plate 307, increasing the expansion area of ​​the flip plate 307, so that the flip plate 307 and the expansion plate 308 are in a horizontal position to lift the longer plate, so that the longer plate is in a flat state when shearing, and prevents the raised plate from moving when shearing, resulting in a large shearing error. ;

[0037] The specific usage and function of this embodiment: In the present invention, when shearing a longer portion of a plate, the adjusting screw 301 in the guide side groove 3 is rotated on either side of the workbench 1 to drive the adjusting movable plate 302 to move relatively, and the side of the adjusting movable plate 302 drives the outer bottom of the center plate 304 through the movable support plate 303 to drive the lower push plate 305 to push the flip plate 307 to rotate upward at the rear side of the workbench 1. The center plate 304 continues to move, and the inclined rotation of the top will push the flip plate 307 that gradually rotates upward to move, so that the upper push plate 306 on the top of the center plate 304 pushes the flip plate 307 to rotate upward and then become horizontal, and the upper push plate 306 is driven by the center plate 304 to engage with the block installed on the inner side of the expansion plate 308 to drive the expansion plate 308 to unfold, and the flip plate 307 and the expansion plate 308 are connected. The longer plate is lifted in a horizontal position, and the threaded rod in the rotating positioning tank 2 drives the two ends of the two adjusting slides 202 to move along the guide slide 201. The top of the adjusting slide 202 drives the rotating transmission rod 205 in the middle of the positioning support plate 204 to move upward through the support plate 203, so that the push plate 209 is higher than the top of the workbench 1. The positioning card plate 206 at the output end of the servo motor on the right side of the positioning tank 2 is slidably installed in the cross-shaped slot on the right end of the rotating transmission rod 205. The output end of the servo motor on the right side of the positioning tank 2 drives the rotating transmission rod 205 to rotate, so that the push plate 209 gradually pushes the steel plate to move, and the plate moves stably to the bottom of the blade, then the longer part of the steel plate is placed on the flip plate 307, and the hydraulic shearing module 101 on the top of the workbench 1 drives the upper blade to shear;

[0038] For smaller plates, the cut plates fall onto the steel wire core conveyor belt 104, and the support plate 103 is lifted on the inner side of the steel wire core conveyor belt 104 to maintain the flatness of the top of the steel wire core conveyor belt 104. The rotating drive rod 105 drives the steel wire core conveyor belt 104 on the outer side of the rotating transmission wheel 102 to move through the pulley, and the steel wire core conveyor belt 104 brings out the cut plates for picking up.

Claims

1. A steel plate shearing device, comprising a workbench (1), a detachable bracket being installed at the front edge of the workbench (1), the workbench (1) comprising a hydraulic shearing module (101) at the top, and a positioning storage tank (2) having an inclined bottom structure being provided at the front side of the workbench (1); characterized in that: A servo motor is installed on the right side of the positioning tank (2), and a threaded rod is installed on the inner side of the positioning tank (2), and the top of the positioning tank (2) is located on the top of the workbench (1), and guide grooves (201) are opened on both sides of the positioning tank (2); a guide side groove (3) with a T-shaped structure is provided on the rear side of the workbench (1); an adjusting screw (301) is rotatably installed inside the guiding side groove (3), wherein the two ends of the adjusting screw (301) are rotatably installed on the left and right sides of the workbench (1).

2. A steel plate shearing device as claimed in claim 1, characterized in that: Two rotating transmission wheels (102) are rotatably mounted on the bottom rear side of the workbench (1), and the two ends of the two rotating transmission wheels (102) pass through the side of the workbench (1) and are connected via pulleys; a supporting carrier plate (103) is also mounted on the bottom rear side of the workbench (1); the supporting carrier plate (103) is located between the two rotating transmission wheels (102).

3. A steel plate shearing device as claimed in claim 2, characterized in that: A steel wire rope core conveyor belt (104) is rotatably mounted on the outer sides of the two rotating transmission wheels (102); the steel wire rope core conveyor belt (104) is also rotatably mounted on the top of the support carrier plate (103); a rotating drive rod (105) is rotatably mounted on the left side of the workbench (1); the outer side of the rotating drive rod (105) is connected to one end of the rotating transmission wheel (102) at the rear side through a pulley, wherein the pulley diameter on the rotating drive rod (105) is larger than the pulley diameter on the outer side of one end of the rotating transmission wheel (102).

4. A steel plate shearing device as claimed in claim 3, characterized in that: The two ends of the adjusting slide plate (202) are slidably mounted inside the guide groove (201); the adjusting slide plates (202) are mounted on the threaded rods inside the positioning storage tank (2) at two locations, and the tops of the adjusting slide plates (202) are rotatably connected to the bottom of the support plate (203) via a rotating shaft; and the tops of the support plates (203) are mounted with positioning support plates (204) via a rotating shaft.

5. A steel plate shearing device as claimed in claim 4, characterized in that: A cylindrical rotating transmission rod (205) is rotatably mounted in the middle of the positioning support plate (204); a cross-shaped slot is provided at the right end of the rotating transmission rod (205); a positioning clamping plate (206) is mounted on the output end of the servo motor on the right side of the positioning storage tank (2); and the positioning clamping plate (206) is slidably mounted in the cross-shaped slot at the right end of the rotating transmission rod (205).

6. A steel plate shearing device as claimed in claim 5, characterized in that: A positioning support rod (207) is installed on the outer side of the rotating transmission rod (205); a positioning groove is provided at the outer end of the positioning support rod (207), and the inner end of the movable rod (208) is slidably installed inside the positioning groove; a spring is installed on the outer ring sleeve of the movable rod (208), and the spring on the outer side of the movable rod (208) is connected to the outer end of the positioning support rod (207), and a push plate (209) with an arc structure is installed on the outer end of the movable rod (208); wherein a rubber block is provided on the outer side of the push plate (209).

7. A steel plate shearing device as claimed in claim 6, characterized in that: An adjusting movable plate (302) is slidably mounted on the inner side of the guide side groove (3); the adjusting movable plate (302) is also mounted on the outer side of the adjusting screw (301), and a movable support plate (303) is mounted on the outer side of the adjusting movable plate (302) via a rotating shaft.

8. A steel plate shearing device as claimed in claim 7, characterized in that: The side ends of the two movable support plates (303) are connected to the two sides of the center plate (304) with an inclined top structure through a rotating shaft; the center plate (304) is slidably installed in the middle position of the guide side groove (3), and a push-down plate (305) is installed on the outer side surface of the center plate (304).

9. A steel plate shearing device as claimed in claim 8, characterized in that: An upper push plate (306) is installed on the top of the center plate (304); a flip plate (307) is installed on the top of the rear side of the workbench (1) through a rotating shaft; a groove is provided on the side of the flip plate (307), and the flip plate (307) is also installed on the outside of the lower push plate (305) and the upper push plate (306), and an expansion plate (308) is installed on the side of the flip plate (307) through a spring.

10. A steel plate shearing device as claimed in claim 9, characterized in that: A card block is provided on the inner side of the expansion plate (308), and an upper push plate (306) is slidably installed on the inner side of the expansion plate (308), and a guide movable plate (309) is installed on the top of the expansion plate (308); a protrusion is provided on the side end of the guide movable plate (309), and the side end of the guide movable plate (309) is slidably installed in the groove on the side of the flip plate (307).

Images