Paperboard punching machine capable of improving concentricity of finished parts

Abstract

The utility model discloses a paperboard punching machine capable of improving concentricity of finished products, which comprises a feeding device arranged on a workbench, the feeding device comprises a feeding piece, and the feeding piece conveys paperboards in an equal step pitch stepping mode. And the blanking device is arranged in the conveying direction of the feeding piece, the blanking device comprises a stamping piece, the distance between the stamping piece and the blanking position of the paperboard on the same conveying track of the feeding piece is the same, and the distance is the multiple of the step pitch of the feeding piece. The feeding piece is arranged to convey paperboards in a stepping mode at the same step pitch, the outer contour punching column is always concentric with a formed punching through hole in the punching process, then a finished product piece with the concentricity meeting the requirement is obtained, the positioning inserting needle is arranged to achieve automatic centering, and in the paperboard punching process, the positioning inserting needle is arranged to achieve automatic centering, so that the punching precision is improved, and the production efficiency is improved. And the positioning contact pin automatically adjusts the position of the paperboard relative to the stamping part, so that the concentricity of a finished product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cardboard punching, in particular to a cardboard punching machine capable of improving the concentricity of finished products. Background Art

[0002] A stamping press is a mechanical device used to punch materials into specific shapes through a die. In the cardboard processing industry, stamping presses are primarily used to produce various cardboard shapes. Its main components include: a die, a slider that drives the upper die up and down to perform the punching action, a worktable that supports the lower die and the material to be processed, a power assembly that provides the power required for punching, a control system that controls the operation of the stamping press, a feed assembly that feeds the material into the stamping area, and a discharge assembly that separates the finished product from the waste material after punching. Existing feed assemblies commonly use manual feeding, which requires minimal operator training and does not require complex operating skills. These feed assemblies are adaptable to a variety of materials and production environments.

[0003] like Figure 5 As shown, the cardboard finished product produced by the inventor of the present application has a through hole in the middle, and the through hole of the cardboard finished product coincides with the axis of its outer side surface. The inventor's steps for producing the cardboard finished product are to first process the through hole in the middle, and then punch out the cardboard finished product with the through hole in the middle as the center of the circle. In this process, it is necessary to ensure the coaxiality of the punched part with the middle through hole during the second punching. However, when the inventor used manual feeding and automated equipment feeding, it was found that the concentricity of the outer side surface and the middle through hole of the cardboard finished product it produced could not be guaranteed, so that the shape of the produced cardboard parts did not meet the requirements, thereby reducing the yield rate. Utility Model Content

[0004] The utility model solves the concentricity problem of cardboard parts with through holes in the middle and provides a cardboard punching machine that improves the concentricity of the finished parts. The specific technical solution is as follows:

[0005] A cardboard punching machine for improving the concentricity of finished parts includes a workbench for supporting cardboard, the top surface of the workbench being a horizontal plane, and further includes: a feeding device arranged on the workbench, the feeding device including a feeding piece, the feeding piece conveying the cardboard in a step-by-step manner with equal pitch; and a punching device arranged on the workbench, the punching device being arranged in the conveying direction of the feeding piece, the punching device including a punching piece for punching the cardboard, the spacing between the punching positions of the cardboard by the punching piece on the same conveying track of the feeding piece being the same, and the spacing being a multiple of the pitch of the feeding piece.

[0006] Furthermore, the feeding part includes: a feeding cylinder arranged on the workbench, the extension direction of the feeding cylinder is perpendicular and points to the top surface of the workbench, and the feeding cylinder can apply pressure to the cardboard pointing to the top surface of the workbench; and a feeding guide rail arranged on the workbench, the length direction of the feeding guide rail is the conveying direction of the feeding part, and the feeding cylinder moves back and forth an equal distance along the length direction of the feeding guide rail, and this distance is the step distance.

[0007] Preferably, the stamping part includes: a through-hole stamping column for punching the middle through hole of the cardboard; and an outer contour stamping column for punching the outer contour of the cardboard, the plane formed by the axis of the outer contour stamping column and the axis of the through-hole stamping column is parallel to the conveying direction of the feeding part, and there is a through-hole stamping column and an outer contour stamping column on the same conveying track of the feeding part.

[0008] Preferably, the stamping parts are formed with several punching queues having both through-hole punching columns and outer contour punching columns. The punching queues are parallel to the conveying direction of the feed parts. The spacing of the punching queues is the same, but twice the minimum spacing of the through-hole punching columns in adjacent punching queues is a multiple of the pitch of the feed parts.

[0009] Preferably, the blanking device also includes: a punching table arranged on the workbench, the movement direction of the punching table is perpendicular to the top surface of the workbench, the punching part is arranged on a side of the punching table close to the workbench, and the axial direction of the punching part is the same as the movement direction of the punching table; an upper mold plate slidably connected to the radial outer side surface of the punching part, the upper mold plate is connected to the punching table by a compression spring, and the upper mold plate forms a through hole for the punching part to pass through; and a lower mold plate arranged on the top surface of the workbench for placing the cardboard, the top surface of the lower mold plate is parallel to the top surface of the workbench, the lower mold plate and the upper mold plate coincide in the axial projection of the punching part, and the lower mold plate forms a groove that can accommodate the punching part passing through the cardboard, and the radial cross-section of the groove is the same as the shape of the punching part.

[0010] Preferably, the blanking device also includes at least two positioning pins arranged on the side of the upper mold plate close to the cardboard, the axes of the positioning pins are perpendicular to the top surface of the lower mold plate, the plane formed by the axes of the positioning pins is parallel to the conveying direction of the feed piece, the spacing between the positioning pins is a multiple of the pitch of the feed piece, one end of the positioning pin can form a concave-convex matching structure with the lower mold plate, and the positioning pin is an inverted cone shape.

[0011] Preferably, the punching device also includes: a limiting column arranged on a side of the punching table close to the cardboard, the axis of the limiting column is parallel to the axis of the punching part, the upper mold plate slides up and down along the radial side of the limiting column, a limiting groove is arranged on the lower mold plate, the limiting groove is the same as the projection of the limiting column along the axis of the punching part, the depth of the limiting groove is not less than the length of the limiting column protruding from the upper mold plate when the compression spring is compressed; and a limiting plate arranged on the top surface of the lower mold plate, the distance between the two opposite sides of the limiting plate is equal to the width of the cardboard, and the two opposite sides of the limiting plate can limit the lateral position of the cardboard.

[0012] Preferably, the feeding device further comprises a clamping member arranged on the workbench, the clamping member comprises a clamping cylinder, and the clamping cylinder can apply pressure to the cardboard directed toward the workbench.

[0013] Preferably, it also includes a discharging device arranged on the workbench, which includes: a conveyor belt, on which the projections of the stamping parts along the axis fall; a receiving box, which is arranged at the discharging position of the conveyor belt; and a slide connected to the conveyor belt at one end, and the other end of the slide is connected to the receiving box.

[0014] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0015] The utility model arranges a feeding piece to convey the cardboard in a step-by-step manner with the same step distance, and the spacing between the through-hole punching column and the outer contour punching column is a multiple of the step distance, so that during the punching process, the outer contour punching column can always be concentric with the formed punching through hole, thereby obtaining a finished part with concentricity meeting the requirements. Secondly, positioning pins are arranged to realize automatic centering, so that during the punching process of the punching piece, the positioning pins can automatically adjust the position of the cardboard to make it consistent with the relative position of the punching through hole and the contour through hole on the cardboard and the stamping piece, thereby improving the concentricity of the finished part. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of an embodiment of the utility model;

[0017] Figure 2 for Figure 1 Partial enlarged view;

[0018] Figure 3 This is a partial enlarged view of the punching device;

[0019] Figure 4 is a schematic diagram of an embodiment of an upper mold plate;

[0020] Figure 5 This is the shape of the finished part punched by the present invention.

[0021] In the figure: 1. Feeding device; 2. Punching device; 3. Discharging device; 4. Workbench; 5. Finished part; 11. Clamping part; 12. Feeding part; 111. Clamping cylinder; 121. Feeding cylinder; 122. Feeding guide rail; 123. Feeding bracket; 21. Stamping part; 211. Through-hole stamping column; 212. Outer contour stamping column; 22. Upper mold plate; 23. Lower mold plate; 24. Positioning pin; 25. Limiting column; 26. Stamping table; 28. Limiting groove; 29. ​​Limiting plate; 31. Conveyor belt; 32. Receiving box; 33. Slide. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the present invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0024] like Figure 1 As shown, the embodiment of the present invention includes a workbench 4 for supporting cardboard, and the top surface of the workbench 4 is a horizontal surface.

[0025] Specifically, the workbench 4 is provided on the frame for fixing the device for punching cardboard, and its top surface is a horizontal surface, so that the mounting surface of the device placed on its top surface is a horizontal surface. When the upper and lower surfaces of the device are parallel, the cardboard placed on the top surface of the device is also a horizontal surface, so that the punching direction of the subsequent cardboard punching is perpendicular to the cardboard, thereby ensuring the quality of the cardboard punching.

[0026] Combine Figure 2 As shown, the embodiment of the utility model also includes: a feeding device 1 arranged on the workbench 4, the feeding device 1 includes a feeding piece 12, and the feeding piece 12 conveys the cardboard in an equal step-by-step manner; and a punching device 2 arranged on the workbench 4, the punching device 2 is arranged in the conveying direction of the feeding piece 12, and the punching device 2 includes a punching piece 21 for punching the cardboard, and the punching positions of the cardboard on the same conveying track of the feeding piece 12 are all at the same spacing, and the spacing is a multiple of the step of the feeding piece 12.

[0027] Specifically, in this embodiment, the conveying direction of the cardboard is from the left side to the right side of the workbench 4, and the feeding device 1 is fixedly connected to the left and right sides of the workbench 4 respectively, so that the two feeding devices 1 convey the cardboard at the same time, so that there are feeding devices 1 on the left and right sides of the cardboard in the workbench 4 area, so that the movement trajectory of the cardboard does not deflect during the conveying process; wherein the feeding member 12 moves from the left side of the workbench 4 to the right side of the workbench 4, so as to realize the rightward conveying of the cardboard, and the movement distance of the feeding member 12 is the movement distance of the cardboard, that is, the step size. Secondly, the movement distance of the feeding member 12 is the same each time, so that the step size, that is, the movement distance of the cardboard, is the same, so that each time the punching device 2 punches the cardboard, the movement distance of the cardboard is the same, so that the spacing of the punching positions of the cardboard is the same, thereby improving the utilization rate of the cardboard, so that each cardboard can obtain the maximum number of finished parts 5 without affecting the punching quality.

[0028] In addition, a through hole is formed in the center of the cardboard, which is concentric with the outer side surface. The first time the punching part 21 punches out the cardboard is to form a punching through hole, and the second time the punching part punches out the outer contour of the finished part 5 to form a contour through hole. Secondly, the conveying direction of the feeding part 12 is always from the left side to the right side of the workbench 4. The punching part 21 forms a punching through hole and a contour through hole on the cardboard in sequence, wherein the centers of the punching positions of the cardboards with the same conveying direction can be connected into a line parallel to the conveying direction, so that the spacing between the punching through holes and the contour through holes on the line is a multiple of the pitch of the feeding part 12, so that when the cardboard is conveyed in a step-by-step manner at a pitch, the contour through hole can always be concentric with the conveyed punching through hole, thereby ensuring the concentricity of the finished part 5.

[0029] Furthermore, the feeding member 12 includes: a feeding cylinder 121 arranged on the workbench 4, the extension direction of the feeding cylinder 121 is perpendicular and points to the top surface of the workbench 4, and the feeding cylinder 121 can apply pressure to the cardboard pointing to the top surface of the workbench 4; and a feeding guide rail 122 arranged on the workbench 4, the length direction of the feeding guide rail 122 is the conveying direction of the feeding member 12, and the feeding cylinder 121 moves back and forth an equal distance along the length direction of the feeding guide rail 122, and this distance is the step distance.

[0030] Specifically, the feeding cylinder 121 is fixedly connected to the feeding bracket 123 by bolts, so that there is a gap between the telescopic end of the feeding cylinder 121 and the feeding bracket 123 to allow the cardboard to pass through. The telescopic end of the feeding cylinder 121 extends downward to press the cardboard on the feeding bracket 123 to fix it. Secondly, two feeding guide rails 122 parallel in length direction are fixedly connected to the top surface of the workbench 4 by bolts. The feeding bracket 123 is slidably connected to the feeding guide rails 122, so that the feeding bracket 123 drives the feeding cylinder 121 to be able to It moves along the length direction of the feeding guide rail 122, thereby causing the cardboard fixed relatively to the feeding bracket 123 and the feeding cylinder 121 to move along the length direction of the feeding guide rail 122, wherein the length of the feeding guide rail 122 is constant, and the distance of the feeding cylinder 121 along the feeding guide rail 122 is constant, so that the reciprocating motion distance of the feeding cylinder 121 along the feeding guide rail 122 is the pitch of the feeding part 12, that is, the moving distance of the cardboard after each punching of the cardboard by the punching part 21, thereby causing the center of the contour through hole to fall at the center of the punched through hole.

[0031] like Figure 4 As shown, the stamping part 21 includes: a through-hole stamping column 211 for punching the middle through hole of the cardboard; and an outer contour stamping column 212 for punching the outer contour of the cardboard. The plane formed by the axis of the outer contour stamping column 212 and the axis of the through-hole stamping column 211 is parallel to the conveying direction of the feeding part 12. There is a through-hole stamping column 211 and an outer contour stamping column 212 on the same conveying track of the feeding part 12.

[0032] Specifically, the radial cross-section of the through-hole punching column 211 is a punching through-hole, and the radial cross-section of the outer contour punching column 212 is a contour through-hole. During the step-by-step conveying process of the cardboard, the through-hole punching column 211 and the outer contour punching column 212 on the same conveying track punch the cardboard at the same time, so that the cardboard has punching through-holes and contour through-holes at the same time, and then, during the movement of the cardboard to the right, the axis of the outer contour punching column 212 on the right side continuously coincides with the center of the punching through-hole, and then punches out a contour through-hole concentric with the punching through-hole, thereby ensuring the concentricity of the finished part 5.

[0033] Furthermore, the stamping part 21 forms a plurality of punching queues having both through-hole punching columns 211 and outer contour punching columns 212. The punching queues are parallel to the conveying direction of the feed part 12. The spacing of the punching queues is the same, but twice the minimum spacing of the through-hole punching columns 211 in adjacent punching queues is a multiple of the pitch of the feed part 12.

[0034] Specifically, when the cardboard moves from the left side to the right side at a fixed step distance, the through-hole punching column 211 and the outer contour punching column 212 of the same punching queue simultaneously punch out the punching through holes and contour through holes of the same punching queue on the cardboard, wherein the spacing between the through-hole punching columns 211 of adjacent punching queues in the conveying direction is the spacing between the punching through holes of adjacent punching queues on the cardboard. When the spacing is a multiple of the step distance, the column spacing and row spacing in the entire punching queue are the same, and the row spacing is the step distance, thereby increasing the number of finished parts 5 punched out of the cardboard and improving the utilization rate of the cardboard.

[0035] Figure 2 Combine Figure 3 As shown, the blanking device 2 also includes: a punching table 26 arranged on the workbench 4, the movement direction of the punching table 26 is perpendicular to the top surface of the workbench 4, the stamping part 21 is arranged on the side of the punching table 26 close to the workbench 4, and the axial direction of the stamping part 21 is the same as the movement direction of the punching table 26; an upper mold plate 22 slidably connected to the radial outer side surface of the stamping part 21, the upper mold plate 22 is connected to the punching table 26 by a compression spring, and the upper mold plate 22 forms a through hole for the punching part 21 to pass through; and a lower mold plate 23 arranged on the top surface of the workbench 4 for placing the cardboard, the top surface of the lower mold plate 23 is parallel to the top surface of the workbench 4, the lower mold plate 23 and the upper mold plate 22 coincide with the axial projection of the stamping part 21, and the lower mold plate 23 forms a groove that can accommodate the stamping part 21 passing through the cardboard, and the radial cross-section of the groove is the same as the shape of the stamping part 21.

[0036] Specifically, the stamping table 26 is connected to the side of the workbench 4 through a cylinder and a slide rail, so that it moves up and down along the slide rail under the push of the cylinder, and then moves relative to the top surface of the workbench 4, thereby driving the stamping part 21 close to or away from the top surface of the workbench 4, and the axis of the stamping part 21 is always perpendicular to the top surface of the workbench 4 during the movement.

[0037] Secondly, the top surface of the upper mold plate 22 is parallel to the bottom surface of the stamping table 26 and is slidably connected to the radial outer surface of the stamping part 21, wherein the through hole diameter of the upper mold plate 22 can be larger than the radial cross-section of the stamping part 21 or the same as it, so that when the upper mold plate 22 approaches the stamping table 26 along the axial direction of the stamping part 21, the end of the stamping part 21 close to the workbench 4 can pass through the through hole of the upper mold plate 22, so that the end surface of the stamping part 21 protrudes from the bottom surface of the upper mold plate 22, and when the upper mold plate 22 approaches the stamping table 26, the compression spring applies an elastic force to the upper mold plate 22 away from the stamping table 26, and then when the upper mold plate 22 can return to its initial relative position with the stamping table 26 through the compression spring.

[0038] Secondly, the lower mold plate 23 is fixedly connected to the top surface of the workbench 4, and its top surface is parallel to the top surface of the workbench 4 and flush with the position of the cardboard, so that it can provide support for the cardboard conveyed by the feeding piece 12. When the punching table 26 drives the punching part 21 and the upper mold plate 22 to move toward the lower mold plate 23, until the support force exerted on the bottom surface of the upper mold plate 22 by the cardboard placed on the top surface of the lower mold plate 23 is greater than the downward pressure exerted on the upper mold plate 22 by the compression spring, the upper mold plate 22 approaches the punching table 26, and the bottom end surface edge of the punching part 21 and the through-hole edge of the lower mold plate 23 form a cutting structure for cutting the cardboard, thereby cutting out a punching through hole and a contour through hole on the cardboard. The upper mold plate 22 continues to approach the punching table 26, and the bottom end surface of the punching part 21 continues to move downward to embed into the through-hole movement of the lower mold plate 23, so that the cardboard forms a punching through hole and a contour through hole with the same radial cross section as the through-hole punching column 211 and the outer contour punching column 212.

[0039] Furthermore, the blanking device 2 also includes at least two positioning pins 24 arranged on the side of the upper mold plate 22 close to the cardboard, the axis of the positioning pin 24 is perpendicular to the top surface of the lower mold plate 23, the plane formed by the axis of the positioning pin 24 is parallel to the conveying direction of the feed piece 12, the spacing of the positioning pins 24 is a multiple of the pitch of the feed piece 12, one end of the positioning pin 24 can form a concave-convex matching structure with the lower mold plate 23, and the positioning pin 24 is an inverted cone shape.

[0040] Specifically, four positioning pins 24 are fixedly welded to the bottom surface of the upper mold plate 22. The positioning pins 24 and the stamping part 21 punch out through holes in the cardboard at the same time. When the cardboard moves to the right, the positioning pins 24 punch out positioning through holes on the cardboard. The position of the positioning through hole relative to the cardboard is the same as the position of the positioning pins 24 relative to the cardboard, so that the position of the positioning through hole relative to the punching through hole and the contour through hole is the same as the position of the positioning pins 24 relative to the stamping part 21, so that when the cardboard moves to the right, at least one positioning pin 24 is inserted into the formed positioning through hole, and because the positioning pin 24 is an inverted cone, it can be automatically centered, so that the positioning pin 24 inserted into the formed positioning through hole can automatically coincide with the axes of the two, thereby ensuring the position of the punching through hole relative to the stamping part 21, and thereby ensuring that the contour through hole can always be concentric with the punching through hole, ensuring the concentricity of the punching through hole and the contour through hole on the cardboard, and thereby ensuring the concentricity of the finished product 5.

[0041] Furthermore, the blanking device 2 also includes: a limiting column 25 arranged on the side of the punching table 26 close to the cardboard, the axis of the limiting column 25 is parallel to the axis of the punching part 21, the upper mold plate 22 slides up and down along the radial side of the limiting column 25, and a limiting groove 28 is arranged on the lower mold plate 23. The limiting groove 28 is the same as the projection of the limiting column 25 along the axis of the punching part 21, and the depth of the limiting groove 28 is not less than the length of the limiting column 25 protruding from the upper mold plate 22 when the compression spring is compressed; and a limiting plate 29 is arranged on the top surface of the lower mold plate 23, the distance between the two opposite sides of the limiting plate 29 is equal to the width of the cardboard, and the two opposite sides of the limiting plate 29 can limit the lateral position of the cardboard.

[0042] Specifically, the limiting posts 25 are fixedly mounted at the four corners of the bottom surface of the stamping table 26 so as to be slidably connected to the four corners of the upper mold plate 22, thereby enabling the upper mold plate 22 to move parallel to the stamping table 26 along the radial cross-section of the limiting posts 25, thereby ensuring its stability during movement, so that when the upper mold plate 22 moves relative to the stamping table 26, the side of the stamping part 21 does not rub against the through hole of the upper mold plate 22, thereby affecting the blanking accuracy of the cardboard; secondly, a protrusion is formed on the side of the limiting post 25 to limit the downward movement of the upper mold plate 22, thereby enabling the upper mold plate 22 to move vertically up and down under the restriction of the compression spring and the limiting post 25. When the bottom surface of the upper mold plate 22 contacts the cardboard, the limiting post 25 has been embedded in the limiting groove 28, until the bottom surface of the limiting post 25 contacts the bottom surface of the limiting groove 28, and the bottom end of the stamping part 21 is embedded in the through hole of the lower mold plate 23, thereby ensuring the blanking quality of the stamping part 21.

[0043] Secondly, the limit plates 29 are installed on the top surface of the lower mold plate 23. They are installed on both sides of the cardboard to limit its left and right movement, ensuring the position accuracy between the cardboard and the stamping part 21, thereby improving the blanking quality and accuracy of the stamping part 21.

[0044] Furthermore, the feeding device 1 further comprises a clamping member 11 provided on the workbench 4 . The clamping member 11 comprises a clamping cylinder 111 . The clamping cylinder 111 can apply pressure to the cardboard directed toward the workbench 4 .

[0045] Specifically, the clamping part 11 is installed on the left and right sides of the workbench 4. The extension movement of the telescopic end of the clamping cylinder 111 points to the workbench 4. When it squeezes the cardboard on the workbench 4, the punching part 21 starts to punch the cardboard. When it moves away from the cardboard, the feeding part 12 clamps the cardboard and transports it to the right, and the cardboard is punched repeatedly.

[0046] Furthermore, this embodiment also includes a discharging device 3 arranged on the workbench 4, and the discharging device 3 includes: a conveyor belt 31, on which the projections of the stamping parts 21 along the axis fall; a receiving box 32, which is arranged at the discharging position of the conveyor belt 31; and a slide 33 with one end connected to the conveyor belt 31, and the other end of the slide 33 is connected to the receiving box 32.

[0047] Specifically, the conveying surface of the conveyor belt 31 is located below the through hole of the lower mold plate 23, so that the cardboard punched by the stamping part 21 falls onto the conveying surface of the conveyor belt 31 through the through hole, wherein the conveying surface of the conveyor belt 31 corresponding to the through hole stamping column 211 and the outer contour stamping column 212 is divided into left and right sides by a partition, so that the punched cardboard falls on the transmission belt on the left and then falls into the waste and finished parts 5 receiving boxes 32 through slides 33 at different angles, thereby realizing the classified collection of waste punched cardboard, which is convenient for the operator to handle it later.

[0048] Among them, the finished product 5 when the punching part 21 punches the cardboard for the first time may contain defective products, which fall on the conveyor belt 31, and the conveyor belt 31 needs to rotate in the opposite direction to transport it to the waste material receiving box 32.

[0049] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

[0050] The technology, shape and structure that are not described in detail in this utility model are all well-known technologies.

Claims

1. A cardboard punching machine for improving the concentricity of a finished product, comprising a workbench (4) for supporting the cardboard, the top surface of the workbench (4) being a horizontal surface, characterized in that: Also includes: A feeding device (1) is provided on the workbench (4), the feeding device (1) comprising a feeding member (12), the feeding member (12) conveying the paperboard in a step-by-step manner with equal steps; and A punching device (2) is provided on the workbench (4), and the punching device (2) is provided in the conveying direction of the feeding member (12). The punching device (2) comprises a punching member (21) for punching the paperboard. The punching member (21) has the same spacing for punching positions of the paperboard on the same conveying track of the feeding member (12), and the spacing is a multiple of the pitch of the feeding member (12).

2. The cardboard punching machine according to claim 1, characterized in that: The feeding member (12) comprises: a feeding cylinder (121) provided on the workbench (4), the extending direction of the feeding cylinder (121) being vertical and pointing toward the top surface of the workbench (4), and the feeding cylinder (121) being capable of applying pressure to the paperboard pointing toward the top surface of the workbench (4); and A feeding guide rail (122) is provided on the workbench (4), and the length direction of the feeding guide rail (122) is the conveying direction of the feeding member (12). The feeding cylinder (121) reciprocates an equal distance along the length direction of the feeding guide rail (122), and the distance is the step distance.

3. The cardboard punching machine according to claim 1, characterized in that: The stamping part (21) comprises: a through-hole punching column (211) for punching a middle through-hole of the paperboard; and An outer contour punching column (212) is used for punching the outer contour of the paperboard. The plane formed by the axis of the outer contour punching column (212) and the axis of the through-hole punching column (211) is parallel to the conveying direction of the feeding piece (12). There is one through-hole punching column (211) and one outer contour punching column (212) on the same conveying track of the feeding piece (12).

4. The cardboard punching machine according to claim 3, characterized in that: The punching part (21) is formed with a plurality of punching queues having both the through-hole punching columns (211) and the outer contour punching columns (212). The punching queues are parallel to the conveying direction of the feeder (12). The spacings of the punching queues are the same, but twice the minimum spacing of the through-hole punching columns (211) in adjacent punching queues is a multiple of the pitch of the feeder (12).

5. The cardboard punching machine according to claim 1, characterized in that: The punching device (2) further comprises: A punching table (26) is provided on the workbench (4), wherein the movement direction of the punching table (26) is perpendicular to the top surface of the workbench (4), the punching part (21) is provided on a side of the punching table (26) close to the workbench (4), and the axial direction of the punching part (21) is the same as the movement direction of the punching table (26); an upper die plate (22) slidably connected to the radial outer side surface of the punching part (21), the upper die plate (22) being connected to the punching table (26) via a compression spring, the upper die plate (22) forming a through hole for the punching part (21) to pass through; and A lower mold plate (23) is provided on the top surface of the workbench (4) for placing the paperboard. The top surface of the lower mold plate (23) is parallel to the top surface of the workbench (4). The projections of the lower mold plate (23) and the upper mold plate (22) along the axial direction of the punching part (21) coincide with each other. The lower mold plate (23) forms a groove capable of accommodating the punching part (21) passing through the paperboard. The radial cross section of the groove is the same as the shape of the punching part (21).

6. The cardboard punching machine according to claim 5, characterized in that: The punching device (2) further comprises at least two positioning pins (24) arranged on one side of the upper mold plate (22) close to the cardboard, the axes of the positioning pins (24) being perpendicular to the top surface of the lower mold plate (23), the plane formed by the axes of the positioning pins (24) being parallel to the conveying direction of the feed piece (12), the spacing of the positioning pins (24) being a multiple of the pitch of the feed piece (12), one end of the positioning pin (24) being able to form a concave-convex matching structure with the lower mold plate (23), and the positioning pin (24) being in the shape of an inverted cone.

7. The cardboard punching machine according to claim 6, characterized in that: The punching device (2) further comprises: A limiting column (25) is provided on a side of the punching platform (26) close to the paperboard, the axis of the limiting column (25) is parallel to the axis of the punching part (21), and the upper mold plate (22) slides up and down along the radial side of the limiting column (25); a limiting groove (28) provided on the lower die plate (23), the limiting groove (28) being identical to the projection of the limiting column (25) along the axis of the stamping part (21), the depth of the limiting groove (28) being not less than the length of the limiting column (25) protruding from the upper die plate (22) when the compression spring is compressed; and A limiting plate (29) is provided on the top surface of the lower mold plate (23), the distance between the two opposite surfaces of the limiting plate (29) being equal to the width of the paperboard, and the two opposite surfaces of the limiting plate (29) can limit the lateral position of the paperboard.

8. The cardboard punching machine according to claim 1, characterized in that: The feeding device (1) further comprises a clamping member (11) arranged on the workbench (4), wherein the clamping member (11) comprises a clamping cylinder (111), and the clamping cylinder (111) is capable of applying pressure to the paperboard directed toward the workbench (4).

9. The cardboard punching machine according to claim 1, characterized in that: It also includes a discharging device (3) arranged on the workbench (4), and the discharging device (3) includes: A conveyor belt (31), on which the projections of the stamping parts (21) along the axis all fall; a receiving box (32), the receiving box (32) being arranged at a discharge position of the conveyor belt (31); and One end of the slideway (33) is connected to the conveyor belt (31), and the other end of the slideway (33) is connected to the material receiving box (32).

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