Composite trimming and knockout mechanism

Abstract

The utility model relates to the technical field of machining, in particular to a composite trimming and knockout mechanism. The tool comprises an upper tool plate and a lower tool plate which are oppositely arranged, wherein the upper tool plate is hydraulically driven to do lifting motion relative to the lower tool plate; an edge cutting mechanism and a knockout mechanism are arranged between the upper tool plate and the lower tool plate, and the edge cutting mechanism comprises an upper sliding block arranged on the upper tool plate and a lower sliding block arranged on the lower tool plate; an inclined working surface is arranged between the upper sliding block and the lower sliding block; the knockout mechanism comprises a knockout rod arranged on the upper tool plate and a punching punch arranged on the lower tool plate; the top end of the knockout rod is limited in the punching female die of the upper tool plate through a material returning spring. A punching female die is arranged at the top of the punching punch, and the knockout rod applies extrusion force through the punching female die. According to the composite tool, the functions of product trimming and punching are achieved at the same time, the machining efficiency is improved, the problem that a traditional composite punching tool is prone to material clamping is solved, and the failure rate is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a composite trimming and punching mechanism. Background Art

[0002] In the existing mechanical processing process, the composite punching tool is a common processing equipment. However, the traditional composite punching tool often does not have a punching mechanism, which makes it easy for the punching waste to get stuck in the mold cavity, affecting the normal operation of the tool, and thus reducing production efficiency. In addition, the existing composite trimming tool also has the problem of difficulty in adjustment and use. In order to solve the above technical problems, technical personnel in this field have made the following efforts. For example, the Chinese patent, the authorization announcement number is CN204817667U, which discloses an oblique punching die structure for automobile sheet metal stamping parts, which adopts the utility model to ensure that the oblique punching waste flows smoothly onto the waste slide plate or the waste trough. However, the above scheme cannot unload automatically, and the production efficiency is low; and it can only be applied to automobiles, and the entire mechanism is bulky and has poor applicability. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a composite trimming and punching mechanism.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A composite trimming and punching mechanism comprises an upper tooling plate and a lower tooling plate arranged relatively to each other, wherein the upper tooling plate is hydraulically driven to move up and down relative to the lower tooling plate; a trimming mechanism and a punching mechanism are arranged between the upper tooling plate and the lower tooling plate, wherein:

[0006] The trimming mechanism comprises an upper slider arranged on the upper tooling plate and a lower slider arranged on the lower tooling plate; an inclined working surface is arranged between the upper slider and the lower slider;

[0007] The punching mechanism comprises a punching rod arranged on the upper tooling plate and a punching punch arranged on the lower tooling plate; the top end of the punching rod is limited in the punching die of the upper tooling plate by a material withdrawal spring; the top of the punching punch is provided with a punching die, and the punching rod applies extrusion force through the punching die.

[0008] This technical solution realizes the composite processing operation on the punching machine, including trimming and punching, through the coordinated work of hydraulic drive, trimming mechanism and punching mechanism; through the spring assembly set in the hollow cavity, not only the up and down movement of the slider and the punching punch is realized, but also the buffering and resetting functions are played, thereby improving the stability and efficiency of the processing; this technical solution is particularly suitable for large punching machines and can effectively handle the waste generated during the processing. Specifically, the upper tooling plate realizes the lifting and lowering movement relative to the lower tooling plate through the hydraulic drive system, which is realized by the hydraulic cylinder or similar hydraulic actuator, and the extension and contraction of the hydraulic cylinder drives the upper tooling plate to move up and down; when the upper and lower tooling plates are closed, the inclined working surface between the upper slider and the lower slider causes the workpiece to be processed to be subjected to shear force, thereby completing the trimming operation; the punching rod moves downward, and applies extrusion force to the punching punch through the punching die, so that the punching punch completes the punching action; the waste under the punching punch is pushed out when the punching punch rises, completing the removal of the waste.

[0009] In addition, the composite trimming and punching mechanism proposed in the present invention may also have the following additional technical features:

[0010] According to one embodiment of the utility model, the relative closed height range of the upper tooling plate and the lower tooling plate is 310mm-350mm, which is suitable for punching machines with a tonnage of ≥63T.

[0011] In this technical solution, the closing height refers to the distance between the upper die base and the lower die base when the punch press is fully closed. The closing height range of 310mm-350mm meets the closing height differences of different punch presses and can accommodate all necessary components such as tooling plates, workpieces, trimming mechanisms, and punching mechanisms to ensure that it can be adapted to a variety of punch presses; punch presses with a tonnage of ≥63T can withstand and transmit at least 63 tons of punching force.

[0012] According to an embodiment of the utility model, the lower tooling plate is provided with a hollow cavity, and the cavity is provided with a spring assembly.

[0013] In this technical solution, the spring assembly arranged in the lower tooling plate plays an important role in buffering and shock absorption, reset function, adaptability and stability, preventing material jamming, and compact and lightweight structure, which together ensure the efficient, stable and precise operation of the punch press.

[0014] According to an embodiment of the utility model, the spring assembly includes a return spring arranged at the bottom of the lower slider, the lower slider moves downward under the extrusion force of the upper slider, and the lower slider moves upward under the restoring force of the return spring.

[0015] In the present technical solution, when there is no external force, the lower slider remains in an initial position under the restoring force of the return spring; when the upper slider applies a downward extrusion force to the lower slider, the restoring force of the return spring is overcome to cause the lower slider to move downward; the return spring is compressed and stores elastic potential energy; when the extrusion force of the upper slider on the lower slider disappears or decreases, the return spring begins to release the elastic potential energy stored previously, and the elastic potential energy is converted into kinetic energy of the lower slider, pushing the lower slider to move upward.

[0016] According to one embodiment of the utility model, the spring assembly includes a buffer spring arranged at the bottom of the punching punch, the punching punch moves downward under the extrusion force of the punching rod, and the punching punch moves upward under the restoring force of the buffer spring.

[0017] In the present technical solution, when there is no external force, the punching punch remains in an initial position under the action of the restoring force of the buffer spring; when the punching rod moves downward and applies a downward extrusion force to the punching punch, the restoring force of the buffer spring is overcome, causing the punching punch to move downward; the punch spring is compressed and stores elastic potential energy; when the extrusion force of the punching rod disappears or decreases, the buffer spring begins to release the elastic potential energy stored before; the elastic potential energy is converted into kinetic energy of the punching punch, pushing the punching punch upward; the punching rod is lifted, and the buffer spring releases energy, causing the punching punch to return to its initial position.

[0018] According to an embodiment of the utility model, the waste material in the die cavity of the punching punch is synchronously pushed out to the top of the punching punch under the action of the restoring force of the buffer spring.

[0019] In the present technical solution, when the punching punch moves downward, it penetrates the workpiece and forms the desired hole on the workpiece, and the punched waste material remains in the die cavity below the punching punch; the buffer spring is located at the bottom of the punching punch, and is used to provide a restoring force when the punching punch moves upward; when the punching punch completes punching and is ready to return to its initial position, the buffer spring begins to release the elastic potential energy stored previously, and when the punching punch moves upward under the restoring force of the buffer spring, it will produce relative movement with the waste material in the die cavity; timely discharge of waste material is used to keep the mold clean and efficient, and avoid blocking the mold or affecting the accuracy of the next punching operation.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] (1) The tooling closing height is 310mm-350mm, which is suitable for ordinary punch presses with tonnage ≥63T. It is light, compact and highly applicable.

[0022] (2) The composite tooling can simultaneously realize the functions of product trimming and punching, thus improving processing efficiency;

[0023] (3) By designing a punching mechanism, the problem of easy material jamming in traditional composite punching tooling is solved, thus reducing the failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional view of the utility model.

[0025] Figure 2 It is an outline diagram of the utility model.

[0026] In the figure: 1. Upper tooling plate; 2. Lower tooling plate; 3. Edge trimming mechanism; 4. Material withdrawal spring; 5. Material knocking rod; 6. Punching punch. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example 1

[0029] like Figure 1 and Figure 2 As shown, this embodiment provides a composite trimming and punching mechanism, including an upper tooling plate and a lower tooling plate arranged relatively to each other, the upper tooling plate is hydraulically driven to move up and down relative to the lower tooling plate; a trimming mechanism and a punching mechanism are arranged between the upper tooling plate and the lower tooling plate, wherein:

[0030] The trimming mechanism comprises an upper slider arranged on the upper tooling plate and a lower slider arranged on the lower tooling plate; an inclined working surface is arranged between the upper slider and the lower slider;

[0031] The punching mechanism comprises a punching rod arranged on the upper tooling plate and a punching punch arranged on the lower tooling plate; the top end of the punching rod is limited in the punching die of the upper tooling plate by a material withdrawal spring; the top of the punching punch is provided with a punching die, and the punching rod applies extrusion force through the punching die.

[0032] like Figure 1 and Figure 2As shown, this technical solution realizes the composite processing operation on the punching machine, including trimming and punching, through the coordinated work of hydraulic drive, trimming mechanism and punching mechanism; through the spring assembly arranged in the hollow cavity, not only the up and down movement of the slider and the punching punch is realized, but also the buffering and resetting functions are played, thereby improving the stability and efficiency of the processing; this technical solution is particularly suitable for large punching machines and can effectively handle the waste generated during the processing. Specifically, the upper tooling plate realizes the lifting and lowering movement relative to the lower tooling plate through the hydraulic drive system, which is realized by the hydraulic cylinder or similar hydraulic actuator, and the extension and contraction of the hydraulic cylinder drives the upper tooling plate to move up and down; when the upper and lower tooling plates are closed, the inclined working surface between the upper slider and the lower slider causes the workpiece to be processed to be subjected to shear force, thereby completing the trimming operation; the punching rod moves downward, and applies extrusion force to the punching punch through the punching die, so that the punching punch completes the punching action; the waste under the punching punch is pushed out when the punching punch rises, completing the removal of the waste.

[0033] In addition, the composite trimming and punching mechanism proposed in the present invention may also have the following additional technical features:

[0034] According to one embodiment of the utility model, the relative closed height range of the upper tooling plate and the lower tooling plate is 310mm-350mm, which is suitable for punching machines with a tonnage of ≥63T.

[0035] In this technical solution, the closing height refers to the distance between the upper die base and the lower die base when the punch press is fully closed. The closing height range of 310mm-350mm meets the closing height differences of different punch presses and can accommodate all necessary components such as tooling plates, workpieces, trimming mechanisms, and punching mechanisms to ensure that it can be adapted to a variety of punch presses; punch presses with a tonnage of ≥63T can withstand and transmit at least 63 tons of punching force.

[0036] According to an embodiment of the utility model, the lower tooling plate is provided with a hollow cavity, and the cavity is provided with a spring assembly.

[0037] In this technical solution, the spring assembly arranged in the lower tooling plate plays an important role in buffering and shock absorption, reset function, adaptability and stability, preventing material jamming, and compact and lightweight structure, which together ensure the efficient, stable and precise operation of the punch press.

[0038] According to an embodiment of the utility model, the spring assembly includes a return spring arranged at the bottom of the lower slider, the lower slider moves downward under the extrusion force of the upper slider, and the lower slider moves upward under the restoring force of the return spring.

[0039] In the present technical solution, when there is no external force, the lower slider remains in an initial position under the restoring force of the return spring; when the upper slider applies a downward extrusion force to the lower slider, the restoring force of the return spring is overcome to cause the lower slider to move downward; the return spring is compressed and stores elastic potential energy; when the extrusion force of the upper slider on the lower slider disappears or decreases, the return spring begins to release the elastic potential energy stored previously, and the elastic potential energy is converted into kinetic energy of the lower slider, pushing the lower slider to move upward.

[0040] According to one embodiment of the utility model, the spring assembly includes a buffer spring arranged at the bottom of the punching punch, the punching punch moves downward under the extrusion force of the punching rod, and the punching punch moves upward under the restoring force of the buffer spring.

[0041] In the present technical solution, when there is no external force, the punching punch remains in an initial position under the action of the restoring force of the buffer spring; when the punching rod moves downward and applies a downward extrusion force to the punching punch, the restoring force of the buffer spring is overcome, causing the punching punch to move downward; the punch spring is compressed and stores elastic potential energy; when the extrusion force of the punching rod disappears or decreases, the buffer spring begins to release the elastic potential energy stored before; the elastic potential energy is converted into kinetic energy of the punching punch, pushing the punching punch upward; the punching rod is lifted, and the buffer spring releases energy, causing the punching punch to return to its initial position.

[0042] According to an embodiment of the utility model, the waste material in the die cavity of the punching punch is synchronously pushed out to the top of the punching punch under the action of the restoring force of the buffer spring.

[0043] In the present technical solution, when the punching punch moves downward, it penetrates the workpiece and forms the desired hole on the workpiece, and the punched waste material remains in the die cavity below the punching punch; the buffer spring is located at the bottom of the punching punch, and is used to provide a restoring force when the punching punch moves upward; when the punching punch completes punching and is ready to return to its initial position, the buffer spring begins to release the elastic potential energy stored previously, and when the punching punch moves upward under the restoring force of the buffer spring, it will produce relative movement with the waste material in the die cavity; timely discharge of waste material is used to keep the mold clean and efficient, and avoid blocking the mold or affecting the accuracy of the next punching operation.

[0044] The usage process of the above embodiment is as follows:

[0045] like Figure 1 and Figure 2As shown, firstly, the product to be processed is placed on the lower tooling plate, and a composite punching operation is performed through the trimming mechanism and the punching punch; during the punching process, the ejector spring is forced to shrink, and the punching rod is returned to the punching die; when the punching is completed, the ejector spring pops out, pushing the punching rod to push the waste material out of the die cavity, realizing automatic unloading; then the processed product is taken out for the next round of processing.

[0046] Although the utility model is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the utility model is not limited thereto. Without departing from the spirit and essence of the utility model, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the utility model, and these modifications or substitutions shall be within the scope of the utility model / any person of ordinary skill in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the utility model, and they shall be within the scope of protection of the utility model. Therefore, the scope of protection of the utility model shall be based on the scope of protection of the claims.

Claims

1. A composite trimming and punching mechanism, characterized in that: It includes an upper tooling plate and a lower tooling plate which are arranged relatively to each other. The upper tooling plate is driven by hydraulic pressure to move up and down relative to the lower tooling plate. A trimming mechanism and a punching mechanism are arranged between the upper tooling plate and the lower tooling plate, wherein: The trimming mechanism comprises an upper slider arranged on the upper tooling plate and a lower slider arranged on the lower tooling plate; an inclined working surface is arranged between the upper slider and the lower slider; The punching mechanism comprises a punching rod arranged on the upper tooling plate and a punching punch arranged on the lower tooling plate; the top end of the punching rod is limited in the punching die of the upper tooling plate by a material withdrawal spring; the top of the punching punch is provided with a punching die, and the punching rod applies extrusion force through the punching die.

2. The composite trimming and punching mechanism according to claim 1, characterized in that: The relative closed height range of the upper tooling plate and the lower tooling plate is 310mm-350mm, and is suitable for punching machines with a tonnage of ≥63T.

3. The composite trimming and punching mechanism according to claim 1 or 2, characterized in that: The lower tooling plate is provided with a hollow cavity, and the cavity is provided with a spring assembly.

4. The composite trimming and punching mechanism according to claim 3, characterized in that: The spring assembly comprises a return spring arranged at the bottom of the lower slider. The lower slider moves downward under the extrusion force of the upper slider, and the lower slider moves upward under the restoring force of the return spring.

5. The composite trimming and punching mechanism according to claim 4, characterized in that: The spring assembly comprises a buffer spring arranged at the bottom of the punching punch. The punching punch moves downward under the extrusion force of the punching rod, and the punching punch moves upward under the restoring force of the buffer spring.

6. The composite trimming and punching mechanism according to claim 1, characterized in that: The waste material in the die-out cavity of the punching punch is synchronously pushed out to the top of the punching punch under the restoring force of the buffer spring.

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