Trapezoidal punching equipment for metal sheets

Abstract

The present invention discloses a trapezoidal punching device for metal sheets, which relates to the technical field of punching equipment and is invented to solve the technical problem of being unable to shear and produce special-shaped sheet products. It includes a punching mechanism, including a fixed cutter, a floating cutter and a reset member. The floating cutter is arranged tangent to the fixed cutter, and the floating cutter can be lifted and lowered relative to the fixed cutter along the z-axis direction. The punching mechanism has two ends, and a sleeve is arranged at the center position of the two ends, and the sleeve is rotatably connected to the support shaft; the driving mechanism has two telescopic ends, and the two telescopic ends are rotatably connected to the two ends of the punching mechanism. The trapezoidal punching device for metal sheets provided in an embodiment of the present invention drives the punching mechanism to reciprocate within an angle range in the horizontal direction around the support shaft, and performs shearing at the boundary position, so that the punching position undergoes periodic reciprocating motion changes, thereby obtaining an isosceles trapezoidal sheet product.

Description

Technical Field

[0001] The invention relates to the technical field of punching equipment, and in particular to a trapezoidal punching equipment for metal plates. Background Art

[0002] During the production process of metal sheets, some industries have certain requirements on the length of metal sheets used in them. In order to meet the supply requirements of such metal sheet products, the produced metal sheets need to be cut to size so that their length can meet the construction requirements.

[0003] Existing punching equipment is generally fixed and can only cut along the same position angle, and cannot cut and produce special-shaped sheet products. Summary of the invention

[0004] An embodiment of the present invention provides a trapezoidal punching device for metal sheets, which at least solves the technical problem that the conventional punching device is fixedly arranged and can only perform shearing along the same position angle, and cannot produce special-shaped sheet products by shearing.

[0005] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0006] A trapezoidal punching device for metal plates, which performs trapezoidal punching on metal plates, comprises:

[0007] The workbench has a support shaft at the center of one side along the y-axis direction;

[0008] The punching mechanism comprises a fixed cutter, a floating cutter and a reset member, wherein the floating cutter is arranged tangentially to the fixed cutter, and the floating cutter can be lifted and lowered relative to the fixed cutter along the z-axis direction, and the punching mechanism has two ends, and a shaft sleeve is arranged at the center of the two ends, and the shaft sleeve is rotatably connected to the support shaft;

[0009] The driving mechanism has two telescopic ends, and the two telescopic ends are rotatably connected to the two ends of the punching mechanism;

[0010] Under the working state, the two telescopic ends of the driving mechanism alternately extend and retract, driving the punching mechanism to reciprocate around the support axis in the horizontal direction within an angle range. The angle range has two boundaries. When the punching mechanism rotates to one of the boundary positions of the angle range, the floating cutter and the fixed cutter punch out the metal sheet. After one punching action is completed, the floating cutter returns to its initial height position through the reset part, and the metal sheet continues to be fed. When the punching mechanism rotates to another boundary position of the angle range, the floating cutter and the fixed cutter punch out the metal sheet again to obtain an isosceles trapezoidal product.

[0011] The beneficial effects of the present application are as follows: the trapezoidal punching equipment for metal plates provided in the embodiment of the present invention drives the punching mechanism to reciprocate horizontally around the support axis within an angle range, and performs shearing at the boundary position, so that the punching position undergoes periodic reciprocating motion changes, and the punching lines formed by two adjacent punching positions are symmetrically arranged. After one shearing, continuous feeding is performed, and a second shearing is performed after changing the angle, thereby obtaining an isosceles trapezoidal plate product. The angle of the product can be adaptively adjusted through the swing angle of the punching mechanism, thereby expanding the scope of application of the present application.

[0012] Furthermore, one of the telescopic ends of the driving mechanism is extended, and the other telescopic end is retracted. The punching mechanism is rotated clockwise around the support axis in a horizontal direction by an angle so that the punching mechanism is tilted. The metal sheet is placed between the floating cutter and the fixed cutter, and a downward impact force is applied to the floating cutter. The floating cutter and the fixed cutter perform a punching action on the metal sheet. After the punching action is completed, the reset part restores the metal sheet to its initial height position, and then one of the telescopic ends of the driving mechanism is retracted, and the other telescopic end is extended. The punching mechanism is rotated counterclockwise around the support axis in a horizontal direction by the same angle so that the punching mechanism is tilted. The punching action is repeated to obtain an isosceles trapezoidal product.

[0013] In some embodiments, a support mechanism is further included, which is arranged on the other side of the workbench and is arranged opposite to the punching mechanism along the x-axis direction, and two driving mechanisms are connected to two end pins of the support mechanism, so that the driving mechanism can perform adaptive angular movement in the process of driving the punching mechanism. Such an arrangement can enable the driving mechanism to perform adaptive angular movement in the process of driving the punching mechanism to avoid interference.

[0014] In some embodiments, the support mechanism includes a support bottom plate, a support top plate, and a plurality of support vertical plates, wherein the support bottom plate is arranged in parallel with the support top plate, and the plurality of support vertical plates are arranged at intervals between the support bottom plate and the support top plate. Such an arrangement improves the bearing capacity of the support top plate while reducing the overall weight, thus achieving a lightweight design.

[0015] In some embodiments, a flow guiding mechanism is disposed on the upper surface of the supporting top plate, and the flow guiding mechanism includes a bracket, and a roller is rotatably connected to the top of the bracket. In this way, the flow guiding mechanism is arranged in the feeding path of the plate material to guide the feeding direction, thereby improving the feeding stability, and is designed to be in rolling contact to reduce the friction between the plate material and the plate material.

[0016] In some embodiments, the punching mechanism further includes a bearing unit, the bearing unit includes a base and a bearing seat, the base and the bearing seat are arranged in parallel, and the two are fixedly connected by a plurality of vertically placed connecting plates, and the fixed cutter is fixedly connected to the bearing seat through the fixed seat. Such an arrangement improves the bearing capacity.

[0017] In some embodiments, the punching mechanism further includes a floating unit, the floating unit includes a floating seat and a top seat, the top seat is fixedly connected to the floating seat via a connecting seat, a plurality of buffer seats are arranged at intervals on the top of the top seat, the floating cutter is fixedly connected to the floating seat via a positioning seat, and a reinforcing plate is arranged between the positioning seat and the floating seat. With such an arrangement, when the punch presses the buffer seat, the buffer seat transmits the impact force to the floating seat via the top seat, and the floating seat drives the floating cutter to shear the plate.

[0018] In some embodiments, a pressing plate is arranged above the fixed seat, the pressing plate is fixedly connected to the connecting seat through a telescopic member, a guide plate is arranged on the side of the pressing plate away from the floating cutter, a feed guide plate is arranged on the top of the fixed seat, and the feed guide plate and the guide plate are arranged opposite to each other along the z-axis direction. With such arrangement, an introduction area for the sheet is formed between the feed guide plate and the guide plate, and the guide plate has an inclined surface, which gradually flattens the sheet into the space between the floating cutter and the fixed cutter for shearing.

[0019] In some embodiments, the blanking mechanism further includes two sets of reset guide units, the reset guide units include a vertical plate and a concave plate, the protrusion of the vertical plate is plugged into the groove of the concave plate, and the groove can slide up and down along the outer wall of the protrusion, the left and right sides of the outer wall of the protrusion are installed with a first slide plate, the left and right sides of the inner wall of the groove are installed with a second slide plate, the first slide plate is slidably connected with the second slide plate, a partition is arranged in a direction perpendicular to the vertical plate, and is arranged parallel to the concave plate and located below the concave plate, and reset parts are installed on the left and right sides of the inner part of the concave plate, and the reset parts are connected through a connecting block partition. Such a setting limits the motion trajectory and shearing path of the floating cutter relative to the fixed cutter, improves the stability during the shearing action, and resets through the reset part after the shearing action is completed.

[0020] In some embodiments, a guide cylinder is arranged at the center of the partition, a guide rod is inserted into the inner cavity of the guide cylinder, one end of the guide rod is fixedly connected to the concave plate, a lifting block is installed at the other end of the guide rod, and a through hole is provided at the corresponding position of the lifting block and the base. In this way, on the basis of the external guide limit, the internal guide limit is also performed, and the combination of internal and external guides improves the stability while improving the shearing accuracy between the floating cutter and the fixed cutter, avoiding the shearing position offset between them. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an axonometric diagram of a trapezoidal blanking device for metal sheets according to an embodiment of the present application;

[0022] Figure 2 A schematic diagram of one of the shearing actions of the trapezoidal blanking device for metal plates according to an embodiment of the present application;

[0023] Figure 3Another schematic diagram of shearing action of the trapezoidal blanking device for metal plates according to an embodiment of the present application;

[0024] Figure 4 This is a schematic diagram of a sheet product sheared by a trapezoidal punching device for metal sheets according to an embodiment of the present application;

[0025] Figure 5 This is a schematic diagram of the blanking mechanism of the embodiment of the present application from a first perspective;

[0026] Figure 6 This is a front view of the punching mechanism of the embodiment of the present application;

[0027] Figure 7 This is a cross-sectional view of a reset guide unit of a blanking mechanism according to an embodiment of the present application;

[0028] Figure 8 This is a cross-sectional view of a floating unit of a blanking mechanism according to an embodiment of the present application;

[0029] Fig. 9 This is a schematic diagram of the punching mechanism from a second perspective of an embodiment of the present application.

[0030] In the figure:

[0031] 1. Punching mechanism;

[0032] 11. bearing unit, 111. base, 112. bearing seat, 113. connecting plate, 114. feed guide plate, 115. fixing seat, 116. fixing cutter;

[0033] 12. floating unit, 121. floating seat, 122. top seat, 123. connecting seat, 124. buffer seat, 125. guide plate; 126. telescopic member, 127. pressing plate, 128. floating cutter, 129. positioning seat, 1210. reinforcing plate;

[0034] 13. reset guide unit, 131. vertical plate, 132. concave plate, 133. protrusion, 134. groove, 135. first slide plate, 136. second slide plate, 137. partition plate, 138. reset member, 139. connecting block, 140. guide cylinder, 141. guide rod, 142. lifting block, 143. through hole;

[0035] 2. Driving mechanism;

[0036] 3. Support mechanism, 31. Support bottom plate, 32. Support vertical plate, 33. Support top plate;

[0037] 4. flow guiding mechanism, 41. support, 42. rotating roller;

[0038] 5. Limiting parts; 6. Punching line; 7. Punched products; 8. Punched parts; 9. Bushings; 10. Workbench; 101. Support shaft. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0040] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present disclosure, unless otherwise specified, directional terms such as "axial", "circumferential", and "radial" are generally defined relative to the rotation axis of the rotor in the drive motor, and "inner" and "outer" refer to the inside and outside of the corresponding component contours. The use of terms such as "first", "second", etc. is intended to distinguish different components and does not have order and importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements.

[0044] The present application embodiment discloses a trapezoidal punching device for metal sheets, which performs trapezoidal punching on metal sheets. Figure 1 and Fig. 9 , comprising a workbench 10, a punching mechanism 1 and a driving mechanism 2;

[0045] A support shaft 101 is provided at the center of one side of the workbench 10 along the y-axis direction; in the embodiment of the present application, the support shaft 101 is located at the center of the right side of the workbench 10;

[0046] The punching mechanism 1 includes a fixed cutter 116, a floating cutter 128 and a reset member 138. The floating cutter 128 is arranged tangentially to the fixed cutter 116, and the floating cutter 128 can be lifted and lowered relative to the fixed cutter 128 along the z-axis direction. The punching mechanism 1 has two ends, and a shaft sleeve 9 is arranged at the center of the two ends. The shaft sleeve 9 is rotatably connected to the support shaft 101.

[0047] The driving mechanism 2 has two telescopic ends, and the two telescopic ends are rotatably connected to the two ends of the punching mechanism 1; in the embodiment of the present application, the driving mechanism 2 can be a power source with a telescopic end such as a cylinder, a hydraulic cylinder, an electric cylinder, etc., to drive the punching mechanism 1 to perform a reciprocating swing motion;

[0048] In the working state, the two telescopic ends of the driving mechanism 2 alternately extend and retract, driving the punching mechanism 1 to reciprocate in a horizontal direction around the support shaft 101 within an angle range, and the angle range has two boundaries. When the punching mechanism 1 rotates to one of the boundary positions of the angle range, the floating cutter 128 and the fixed cutter 116 punch out the metal sheet. After one punching action is completed, the floating cutter 128 returns to the initial height position through the reset member 138, and the metal sheet continues to be fed. When the punching mechanism 1 rotates to another boundary position of the angle range, the floating cutter 128 and the fixed cutter 116 punch out the metal sheet again to obtain an isosceles trapezoidal product.

[0049] The beneficial effects of the present application are as follows: the trapezoidal punching equipment for metal plates provided in the embodiment of the present invention drives the punching mechanism to reciprocate horizontally around the support axis within an angle range, and performs shearing at the boundary position, so that the punching position undergoes periodic reciprocating motion changes, and the punching lines formed by two adjacent punching positions are symmetrically arranged. After one shearing, continuous feeding is performed, and a second shearing is performed after changing the angle, thereby obtaining an isosceles trapezoidal plate product. The angle of the product can be adaptively adjusted through the swing angle of the punching mechanism, thereby expanding the scope of application of the present application.

[0050] See also Figure 2 and Figure 3, one of the telescopic ends of the driving mechanism 2 is extended, and the other telescopic end is retracted. The punching mechanism 1 is rotated clockwise around the support shaft 101 by an angle in the horizontal direction, so that the punching mechanism 1 is tilted, and the metal sheet is placed between the floating cutter 128 and the fixed cutter 116, and a downward impact force is applied to the floating cutter 128. The floating cutter 128 and the fixed cutter 116 perform a punching action on the metal sheet. After the punching action is completed, it is restored to the initial height position through the reset member 138, and then one of the telescopic ends of the driving mechanism 2 is retracted, and the other telescopic end is extended. The punching mechanism 1 is rotated counterclockwise around the support shaft 101 by the same angle in the horizontal direction, so that the punching mechanism 1 is tilted, and the punching action is repeated to obtain an isosceles trapezoidal product.

[0051] See also Figure 5 , further comprising a support mechanism 3, which is arranged on the other side of the workbench 10 and is arranged opposite to the punching mechanism 1 along the x-axis direction, and two driving mechanisms 2 are connected to two end pins of the support mechanism 3, so that the driving mechanism 2 can perform adaptive angular movement in the process of driving the punching mechanism 1. The driving mechanism 2 can perform adaptive angular movement in the process of driving the punching mechanism 1 to avoid interference.

[0052] The supporting mechanism 3 mentioned above is specifically described below by way of example. The supporting mechanism 3 includes a supporting bottom plate 31, a supporting top plate 33, and a plurality of supporting vertical plates 32. The supporting bottom plate 31 is arranged in parallel with the supporting top plate 33, and the plurality of supporting vertical plates 32 are arranged at intervals between the supporting bottom plate 31 and the supporting top plate 33. While improving the bearing capacity of the supporting top plate 33, the overall weight is reduced, and a lightweight design is achieved.

[0053] Please continue to see Figure 1 In the process of feeding, the feeding path needs to be limited to ensure smooth feeding. The upper surface of the supporting top plate 33 is provided with a guide mechanism 4, which includes a bracket 41, and a roller 42 is rotatably connected to the top of the bracket 41. In this way, the guide mechanism 4 is arranged in the feeding path of the plate material to guide the feeding direction, thereby improving the feeding stability. At the same time, it is designed to be in rolling contact to reduce the friction between the plate material and the plate material.

[0054] Please continue to see Figure 5 The punching mechanism 1 further includes a bearing unit 11, which includes a base 111 and a bearing seat 112. The base 111 and the bearing seat 112 are arranged in parallel and are fixedly connected by a plurality of vertically placed connecting plates 113. The fixed cutter 116 is fixedly connected to the bearing seat 112 via a fixed seat 115. Thus, the bearing capacity is improved.

[0055] Continue to see Figure 5The punching mechanism 1 further includes a floating unit 12, which includes a floating seat 121 and a top seat 122. The top seat 122 is fixedly connected to the floating seat 124 through a connecting seat 123. A plurality of buffer seats 124 are arranged at intervals on the top of the top seat 122. The floating cutter 128 is fixedly connected to the floating seat 121 through a positioning seat 129. A reinforcing plate 1210 is arranged between the positioning seat 129 and the floating seat 121. The punching machine punches the buffer seat 124, and the buffer seat 124 transmits the impact force to the floating seat 121 through the top seat 122. The floating seat 121 drives the floating cutter 128 to shear the plate.

[0056] See also Figure 6 and Figure 8 A pressure plate 127 is arranged above the fixed seat 115, and the pressure plate 127 is fixedly connected to the connecting seat 123 through a telescopic member 126. A guide plate 125 is arranged on the side of the pressure plate 127 away from the floating cutter 128, and a feed guide plate 114 is arranged on the top of the fixed seat 115. The feed guide plate 114 and the guide plate 125 are arranged opposite to each other along the z-axis direction. An introduction area for the sheet is formed between the feed guide plate 114 and the guide plate 125. The guide plate 125 has an inclined surface, which gradually flattens the sheet into the space between the floating cutter 128 and the fixed cutter 116 for shearing. The telescopic member 126 mentioned here can be a cylinder and a cylinder with one side opening, one end of the cylinder is inserted into the open end of the cylinder, and a spring is arranged between the other end of the cylinder and the closed end of the cylinder, so that the spring undergoes elastic deformation after being squeezed, and tends to return to its initial position and state after losing the external force.

[0057] See also Figure 7 The blanking mechanism 1 also includes two sets of reset guide units 13, the reset guide units 13 include a vertical plate 131 and a concave plate 132, the protrusion 133 of the vertical plate 131 is plugged into the groove 134 of the concave plate 132, and the groove 134 can slide up and down along the outer wall of the protrusion 133, the outer wall of the protrusion 133 is installed with a first slide plate 135 on both sides, the inner wall of the groove 134 is installed with a second slide plate 136 on both sides, the first slide plate 135 is slidably connected with the second slide plate 136, and a partition plate 137 is arranged in a direction perpendicular to the vertical plate 131 and connected with the concave plate 1 32 is arranged in parallel and is located below the concave plate 132. Resetting members 138 are installed on the left and right sides of the inside of the concave plate 132. The resetting members 138 are connected to the partition plate 137 through a connecting block 139, which limits the movement trajectory and shearing path of the floating cutter 128 relative to the fixed cutter 116, thereby improving the stability during the shearing action. After the shearing action is completed, it is reset by the resetting member 138. The resetting member 138 mentioned here can be a hydraulic cylinder, which discharges hydraulic pressure after being squeezed, performs adaptive action, and recovers to the initial state through hydraulic pressure after losing external force.

[0058] Please continue to see Figure 7A guide cylinder 140 is arranged at the center of the partition 137. A guide rod 141 is inserted into the inner cavity of the guide cylinder 140. One end of the guide rod 141 is fixedly connected to the concave plate 132. A lifting block 142 is installed at the other end of the guide rod 141. A through hole 143 is provided at the corresponding position of the lifting block 142 and the base 111. On the basis of the external guide limit, the internal guide limit is also carried out. The combination of internal and external guides improves the stability and the shearing accuracy between the floating cutter 128 and the fixed cutter 116, avoiding the shearing position offset between them.

[0059] See also Figure 4 The whole is a plate. During the continuous intermittent feeding process (feeding is stopped during shearing and continued after the shearing action is completed), the blanking line 6 formed by reciprocating swing shearing is symmetrically arranged between two adjacent blanking lines 6, and the two separated blanking lines 6 are arranged in parallel. The blanked product 7 is obtained by shearing according to the blanking line 6. Figure 7 The shaded part in the middle is the punched part. A limiter 5 is arranged on the workbench corresponding to the swing amplitude boundary position of the punching mechanism 1 to limit the extreme position of the punching mechanism 1. The limiter 5 is made of rubber material.

[0060] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0061] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A trapezoidal punching device for metal sheets, which performs trapezoidal punching on metal sheets, characterized in that: include: The workbench has a support shaft at the center of one side along the y-axis direction; The punching mechanism comprises a fixed cutter, a floating cutter and a reset member, wherein the floating cutter is arranged tangentially to the fixed cutter, and the floating cutter can be lifted and lowered relative to the fixed cutter along the z-axis direction, and the punching mechanism has two ends, and a shaft sleeve is arranged at the center of the two ends, and the shaft sleeve is rotatably connected to the support shaft; The blanking mechanism further comprises a bearing unit, the bearing unit comprising a base and a bearing seat, the base and the bearing seat are arranged in parallel, and the two are fixedly connected by a plurality of vertically placed connecting plates, and the fixed cutter is fixedly connected to the bearing seat by a fixed seat; The blanking mechanism also includes a floating unit, which includes a floating seat and a top seat, the top seat is fixedly connected to the floating seat via a connecting seat, a plurality of buffer seats are arranged at intervals on the top of the top seat, the floating cutter is fixedly connected to the floating seat via a positioning seat, and a reinforcing plate is arranged between the positioning seat and the floating seat; A pressing plate is arranged above the fixing seat, the pressing plate is fixedly connected to the connecting seat through a telescopic member, a guide plate is arranged on a side of the pressing plate away from the floating cutter, and a feed guide plate is arranged on the top of the fixing seat; The blanking mechanism also includes two sets of reset guide units, the reset guide units include a vertical plate and a concave plate, the protrusion of the vertical plate is plugged into the groove of the concave plate, and the groove can slide up and down along the outer wall of the protrusion, the left and right sides of the outer wall of the protrusion are both equipped with a first slide plate, the left and right sides of the inner wall of the groove are both equipped with a second slide plate, the first slide plate is slidably connected with the second slide plate, a partition plate is arranged in a direction perpendicular to the vertical plate, and is arranged parallel to the concave plate and is located below the concave plate, and reset members are installed on the left and right sides of the inner part of the concave plate, and the reset members are connected to the partition plate through a connecting block; A guide cylinder is arranged at the center of the partition, a guide rod is inserted into the inner cavity of the guide cylinder, one end of the guide rod is fixedly connected to the concave plate, a lifting block is installed at the other end of the guide rod, and a through hole is provided at a position corresponding to the base; A driving mechanism having two telescopic ends, and the two telescopic ends are rotatably connected to the two ends of the punching mechanism; A support mechanism is arranged on the other side of the workbench, and the two driving mechanisms are connected to two end pins of the support mechanism, so that the driving mechanism can perform adaptive angular movement in the process of driving the punching mechanism; In the working state, the two telescopic ends of the driving mechanism alternately extend and retract, driving the punching mechanism to reciprocate around the support axis in the horizontal direction within an angle range, and the angle range has two boundaries. When the punching mechanism rotates to one of the boundary positions of the angle range, the floating cutter and the fixed cutter punch out the metal sheet. After one punching action is completed, the floating cutter is restored to the initial height position through the reset part, and the metal sheet is continuously fed. When the punching mechanism rotates to another boundary position of the angle range, the floating cutter and the fixed cutter punch out the metal sheet again to obtain an isosceles trapezoidal product.

2. The trapezoidal blanking device for metal sheets according to claim 1, characterized in that: One of the telescopic ends of the driving mechanism is extended, and the other telescopic end is retracted. The punching mechanism is rotated clockwise around the support shaft in the horizontal direction by an angle so that the punching mechanism is tilted. The metal sheet is placed between the floating cutter and the fixed cutter, and a downward impact force is applied to the floating cutter. The floating cutter and the fixed cutter perform a punching action on the metal sheet. After the punching action is completed, the metal sheet is restored to the initial height position through the reset member. Then, one of the telescopic ends of the driving mechanism is retracted, and the other telescopic end is extended. The punching mechanism is rotated counterclockwise around the support shaft in the horizontal direction by the same angle so that the punching mechanism is tilted. The punching action is repeated to obtain an isosceles trapezoidal product.

3. The trapezoidal blanking device for metal sheets according to claim 1, characterized in that: The support mechanism comprises a support bottom plate, a support top plate and a plurality of support vertical plates. The support bottom plate is arranged in parallel with the support top plate, and the plurality of support vertical plates are arranged between the support bottom plate and the support top plate at intervals.

4. The trapezoidal blanking device for metal sheets according to claim 3, characterized in that: The upper surface of the supporting top plate is provided with a flow guiding mechanism, and the flow guiding mechanism comprises a bracket, and the top of the bracket is rotatably connected with a roller.

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