Bus duct terminal cover plate punching and shearing die

Abstract

The utility model discloses a bus duct terminal cover plate punching and shearing die, which belongs to the technical field of power transmission and distribution equipment processing and comprises an upper die holder, a lower die holder and a die cavity. The die cavity comprises a male die assembly and a female die. A plurality of female die holes are formed in the female die; wherein the male die assembly comprises a first male die, and the first male die is located at the bottom of the upper die base and used for cutting the steel belt in the die cavity into blocky plates; the second male die is positioned on one side of the first male die and is used for punching and forming a side plate on one side of the terminal cover; the third male die is positioned on the other side of the first male die and is used for stamping a side plate on the other side of the terminal cover; according to the utility model, the first male die, the second male die, the third male die and the female die are matched with each other, so that one side plate of each of two terminal covers can be respectively formed by the die in each time of punching, and the technical effects of punching, notching and shearing of a steel belt on the same equipment are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of processing of power transmission and distribution equipment, and more specifically, to a punching and shearing die for a busbar trunking terminal cover plate. Background Art

[0002] A busbar trunking is a device responsible for transmitting and distributing electric energy in a low-voltage power supply system, and has many advantages such as large current-carrying capacity, small power loss, high protection level, convenient power distribution, compact structure, easy installation and maintenance, and long service life; with the development of the times, the improvement of living standards, and the progress of industrial automation, the power consumption load is getting larger and larger, and this product has been widely used in all walks of life.

[0003] The busbar trunking needs to be connected to a power distribution cabinet, a transformer or other power equipment through conductors (such as hard copper bars, soft copper strips, etc.). In the past, during the transportation and installation of the busbar trunking, the exposed part of the conductor terminal was wrapped with plastic film or paper shell for packaging, which played a role in isolation protection and terminal insulation, and ensured the conductivity of the entire busbar system; on this basis, if you want to change the length or direction of the busbar system, you need to first remove the insulating tape and then install the busbar trunking. To avoid scratching the conductor coating and the insulating material of the conductor during the removal process, in the prior art, a terminal cover that is easy to disassemble and assemble is often used to replace the plastic film or paper shell to protect the conductor.

[0004] The formed terminal cover is integrally in a U-shaped structure, and it includes a top plate and two side plates connected to the top plate; in the related art, a steel strip is often used as the raw material, and the terminal cover is made after steps such as shearing and punching; this solution first requires the steel strip to be sheared into independent plates on a punching and shearing machine, and then the two sides of the plate are successively moved into a punching die to punch holes to form two side plates; adopting this solution, the plate needs to be transferred and repositioned between various processing equipment, making the processing steps complex, the standardization degree low, and it is difficult to guarantee the processing accuracy. Utility Model Content

[0005] The purpose of the present utility model is to solve the technical problem that in the prior art, multiple processing equipment needs to be called in the processing steps of the busbar trunking terminal cover, and it is difficult to guarantee the processing accuracy, and to propose a punching and shearing die for a busbar trunking terminal cover plate.

[0006] In order to achieve the above purpose, the present utility model adopts the following technical solutions:

[0007] A punching and shearing die for a busbar trunking terminal cover plate, comprising: an upper die base, a lower die base, and a die cavity located between the upper die base and the lower die base; characterized in that the die cavity includes: a punch assembly connected below the upper die base and a concave die connected above the lower die base; a plurality of concave die holes adapted to the punch assembly are provided on the concave die.

[0008] Among them, the punch assembly includes:

[0009] A first punch, which is located at the bottom of the upper die base and is used to shear the steel strip in the die cavity into block-shaped plates;

[0010] A second punch, which is located on one side of the first punch and is used to stamp one side plate of the terminal cover;

[0011] A third punch, which is located on the other side of the first punch and is used to stamp the other side plate of the terminal cover.

[0012] Furthermore, the first punch is of a rectangular plate structure and is perpendicular to the lower surface of the upper die base.

[0013] Furthermore, the second punch includes: a first strip-shaped die, and a number of the first strip-shaped dies are linearly arranged along a direction parallel to the first punch to form a first strip-shaped die group;

[0014] A first column die, and two of the first column dies are respectively located at both ends of the first strip-shaped die group;

[0015] A second strip-shaped die, and a number of the second strip-shaped dies are arranged between the first punch and the first strip-shaped die group;

[0016] The third punch includes: a third strip-shaped die, and a number of the third strip-shaped dies are linearly arranged along a direction parallel to the first punch to form a third strip-shaped die group;

[0017] A second column die, and two of the second column dies are respectively located at both ends of the third strip-shaped die group;

[0018] A fourth strip-shaped die, and a number of the fourth strip-shaped dies are arranged between the first punch and the third strip-shaped die group.

[0019] Furthermore, the second punch and the third punch are symmetrically distributed with respect to the plane where the first punch is located.

[0020] Furthermore, a backing plate is provided between the punch assembly and the upper die base.

[0021] Furthermore, a pressure plate is provided on the side of the punch assembly close to the die, and the lower surface of the punch assembly protrudes from the lower surface of the pressure plate.

[0022] Furthermore, a number of buffer pads are provided between the pressure plate and the backing plate.

[0023] The beneficial effects of the present utility model are:

[0024] A punching and shearing die for a busbar trunking terminal cover plate provided by the present application cooperates a first punch, a second punch, a third punch with a die, so that each stamping of the die can respectively form one side plate of two terminal covers, achieving the technical effect that the steel strip can complete punching, notching and shearing on the same device, and solving the problem that the steel strip needs to be transferred and repositioned between devices and the standardization degree is low in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 FIG. is a schematic diagram of the overall structure of a punching and shearing die for a busbar trunking terminal cover plate provided in an embodiment of the present utility model;

[0026] Figure 2 FIG. is a schematic diagram of the overall structure of a punching and shearing die for a busbar trunking terminal cover plate provided in an embodiment of the present utility model (from another perspective);

[0027] Figure 3 FIG. is a schematic diagram of the structure of a punch assembly in an embodiment of the present utility model.

[0028] The marks in the figure are shown as follows:

[0029] 1. upper die base;

[0030] 11. backing plate; 111. buffer cushion block; 12. guide bushing;

[0031] 2. lower die base;

[0032] 21. guide pillar;

[0033] 3. die cavity;

[0034] 31. punch assembly; 311. first punch; 312. second punch; 3121. first strip die; 3122. first column die; 3123. second strip die; 313. third punch; 3131. third strip die; 3132. second column die; 3133. fourth strip die; 32. die; 33. pressure plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0036] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0037] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0039] Embodiment

[0040] Figures 1 to 3 The embodiment shown in the present application provides a punching and shearing die for busbar trunking terminal cover plates. The punching and shearing die for busbar trunking terminal cover plates can be connected to a steel belt conveying device in actual application and is used to process the input steel belt into several terminal cover plates that are convenient for storage. The manufactured terminal cover plates include a terminal cover top plate and terminal cover side plates connected to both sides of the terminal cover top plate.

[0041] Please refer to Figure 1, a punching and shearing die for the busbar terminal cover plate provided by the present application includes: an upper die base 1, a lower die base 2, and a die cavity 3 located between the upper die base 1 and the lower die base 2; wherein, the upper die base 1 adopts a rectangular block structure, and a die handle for connecting an external pressurizing device is provided on its upper surface. The die handle can disperse the impact and vibration generated during stamping, prevent the upper die base 1 from shaking during the processing, and thus ensure the forming quality and accuracy; the lower die base 2 is located directly below the upper die base 1, and is used to bear the pressure transmitted from the upper part and maintain the stability of the stamping process; during the processing of the terminal cover plate, after the steel strip is sent into the die cavity 3 by a steel strip conveying device or manually, the pressurizing device conveys the pressure to the upper die base 1 through the die handle, causing the upper die base 1 to approach the lower die base 2, driving the die cavity 3 to perform stamping processing on the steel strip inside it.

[0042] Please refer to Figure 2 With Figure 3 , in this embodiment, the die cavity 3 includes: a punch assembly 31 and a die 32; wherein, the punch assembly 31 is connected below the upper die base 1 and moves synchronously with the upper die base 1; the die 32 is connected above the lower die base 2, and a number of die holes adapted to the punch assembly 31 are provided on the die 32; during processing, the punch assembly 31 presses down to contact the steel strip, and in the process of continuing to descend, it cooperates with the cutting edge at the edge of the die hole to punch the steel strip. After the punch assembly 31 is pressed into the die 32, corresponding punching holes and notches are formed on the steel strip; further, in order to enable the die to perform stamping processing on different positions of the steel strip simultaneously during a single stamping process, the punch assembly 31 includes: a first punch 311, a second punch 312, and a third punch 313; wherein, the first punch 311 is located at the bottom of the upper die base 1 and is used to shear the steel strip in the die cavity 3 into block-shaped plates; the second punch 312 is located on one side of the first punch 311 and is used to stamp and form one side plate of the terminal cover; the third punch 313 is located on the other side of the first punch 311 and is used to stamp and form the other side plate of the terminal cover; during processing, the steel strip enters the die from one end close to the second punch 312, and after being processed by the second punch 312, the first punch 311, and the third punch 313 in sequence, it leaves the die from one end close to the third punch 313.

[0043] Please refer to Figure 3 , in the above technical solution, the first punch 311 is integrally in the shape of a rectangular plate structure, which is perpendicular to the lower surface of the upper die base 1 and parallel to the width direction of the steel strip; during processing, after the steel strip moves to the corresponding position, the first punch 311 is pressed into the die 32 to shear the steel strip; after shearing, the side of the first punch 311 close to the second punch 312 is the steel strip; the side of the first punch 311 close to the third punch 313 is the terminal cover plate formed by shearing; the design of the first punch 311 optimizes the step of transferring the steel plate to the shearing equipment for shearing in the traditional solution.

[0044] In order to process a bending process hole between the terminal cover top plate and one side terminal cover side plate on the steel strip while the first punch 311 shears the steel strip, and notch the two side edges of the steel strip to facilitate the subsequent folding of the terminal cover; the second punch 312 includes: a plurality of first strip-shaped dies 3121, two first column dies 3122 and a plurality of second strip-shaped dies 3123; as an implementation manner of the present application, the first strip-shaped die 3121 has a long strip structure, which is perpendicular to the lower surface of the upper die holder 1, and a plurality of first strip-shaped dies 3121 are linearly arranged along the direction parallel to the first punch 311 to form a first strip-shaped die group, and the distance from the first strip-shaped die group to the first punch 311 matches the length of the terminal cover side plate; during the processing, the first strip-shaped die 3121 is pressed into the die hole at the corresponding position of the die 32, and a plurality of bending process holes arranged in a straight line are punched on the surface of the steel strip. At the same time, the steel strip between the bending process hole and the first punch 311 is punched to form one side terminal cover side plate; the bending process hole is used to reduce the bending force required when folding the terminal cover, achieve the effect of releasing the bending stress, and reduce the springback after bending; in the above technical solution, a uniformly wide gap is left between adjacent first strip-shaped dies 3121, and the steel strip not affected by stamping in the gap plays a connecting role between the terminal cover side plate and the steel strip.

[0045] In order to process a V-shaped notch at the edge of the steel strip so that the terminal cover plate after flanging is also convenient to be folded into a busbar terminal cover; the first column die 3122 has a triangular prism structure, and the two first column dies 3122 are perpendicular to the lower surface of the upper die holder 1 and are respectively located at both ends of the first strip-shaped die group; in the above technical solution, the apex angles of the two first column dies 3122 are arranged oppositely, and the distance between the two first column dies 3122 matches the width of the steel strip, so that the stamping position of the first column die 3122 is on both sides of the steel strip; during the processing, the two first column dies 3122 are driven by the upper die holder 1 to contact the steel strip and further press into the corresponding area of the die 32, and V-shaped notches are punched on both sides of the steel strip; in the later process of folding the terminal cover plate into a terminal cover, the V-shaped notches gradually close, and the baffle formed by the contact of the flanges can protect the busbar inside the terminal cover.

[0046] A plurality of second strip-shaped dies 3123 are arranged between the first punch 311 and the first strip-shaped die group and are perpendicular to the lower surface of the upper die holder 1. The second strip-shaped die 3123 is used to cooperate with the die 32 to punch mounting holes on the steel strip.

[0047] With the design of the second punch 312, the mold can punch and form one side plate of the terminal cover plate while shearing the steel strip, and a single stamping action can process the bending process hole between the terminal cover top plate and one side plate and complete the notching work on both sides of the bending process hole. This design optimizes the processing steps of the terminal cover plate and improves the production efficiency.

[0048] While the first punch 311 and the second punch 312 are stamping the steel strip, the terminal cover side plate is processed and formed on the steel strip corresponding to the third punch 313; the third punch 313 includes: a plurality of third strip-shaped dies 3131, two second column dies 3132 and a plurality of fourth strip-shaped dies 3133; wherein, the shape and quantity of the third strip-shaped dies 3131 match those of the first strip-shaped dies 3121, and a plurality of third strip-shaped dies 3131 are linearly arranged along the direction parallel to the first punch 311 to form a third strip-shaped die group; the shape of the second column die 3132 matches that of the first column die 3122, and the two second column dies 3132 are symmetrically arranged on both sides of the third strip-shaped die group; the shape and quantity of the fourth strip-shaped dies 3133 match those of the second strip-shaped dies 3123, and a plurality of fourth strip-shaped dies 3133 are arranged between the first punch 311 and the third strip-shaped die group; as an implementation manner of the present application, the third punch 313 and the second punch 312 are symmetrically distributed with respect to the plane where the first punch 311 is located; with the symmetric design, it is ensured that the lengths of the two-sided terminal cover side plates obtained by each processing match, and the bending process holes, V-shaped notches and port mounting holes on the two-sided terminal cover side plates correspond to each other; when the upper die holder 1 drives the first punch 311 to shear the steel strip in the technical solution of the present application, it also drives the second punch 312 and the third punch 313 to process the steel strip, and can simultaneously perform symmetric punching and notching actions on the steel strips on both sides of the first punch 311, ensuring the symmetry of the finished products of the two-sided side plates of the terminal cover.

[0049] As a preferred implementation manner of the present application, please refer to Figure 2 and Figure 3 , a backing plate 11 is provided between the punch assembly 31 and the upper die holder 1; the first punch 311, the second punch 312 and the third punch 313 are fixedly connected to the backing plate 11 and are perpendicular to the lower surface of the backing plate 11; the backing plate 11 is used to bear the blanking force fed back to the upper die holder 1 during the stamping of the punch assembly 31, preventing the upper die holder 1 from being sunken or deformed.

[0050] As a preferred implementation manner of the present application, a pressure plate 33 is provided on the side of the punch assembly 31 close to the die 32, and the pressure plate 33 plays a role in fixing the punch assembly 31, restricting the lateral deformation of the punch assembly 31 during the stamping process, and avoiding the deviation or distortion of the finished product size; it can be understood that the lower surfaces of the punch assembly 31 all protrude from the lower surface of the pressure plate 33; during processing, the part of the punch assembly 31 protruding from the lower surface of the pressure plate 33 is pressed into the die 32 to complete the punching, notching and shearing processing of the steel strip.

[0051] In the above technical solution, a plurality of buffer pads 111 are provided between the pressure plate 33 and the backing plate 11, which are used to compensate for the dimensional difference and vibration between the backing plate 11 and the pressure plate 33, keep the die cavity 3 stable, reduce the damage to the die caused by the impact, and can effectively extend the service life of the die.

[0052] As a preferred embodiment of the present application, at least two guide pillars 21 are provided on the lower die base 2; the guide pillars 21 are perpendicular to the upper surface of the lower die base 2; a guide sleeve 12 adapted to the guide pillars 21 is provided at the corresponding position on the lower surface of the upper die base 1, and the guide pillars 21 are connected within the guide sleeve 12, so that the upper die base 1 can slide relative to the lower die base 2 along the direction of the guide pillars 21; the guide pillars 21 and the guide sleeve 12 play a guiding role, guiding the upper die base 1 to move along a predetermined path during the stamping process to maintain the consistency of the stamping profile each time.

[0053] Working principle

[0054] When a certain section of steel strip is processed by a busbar terminal cover plate punching and shearing die provided by the present application, after this section of steel strip enters the die cavity 3, it is conveyed to directly below the second punch 312, and one side plate of the terminal cover is formed by stamping with the first punch 311.

[0055] After the stamping process is completed, this section of steel strip is conveyed forward by a certain step length. After reaching the preset position, a second stamping is performed; the other side plate of the terminal cover is formed by stamping with the third punch 313 on this section of steel strip; at the same time, this section of steel strip is sheared into block-shaped terminal cover plates by the first punch 311; wherein, the steel strip located behind this section of steel strip and directly below the second punch 312 is stamped by the second punch 312 during this stamping operation to form another side plate of the terminal cover.

[0056] A busbar terminal cover plate punching and shearing die provided by the present application cooperates with the first punch 311, the second punch 312, the third punch 313 and the die 32, enabling the die to form one side plate of two terminal covers respectively during each stamping, achieving the technical effect of punching, notching and shearing the steel strip on the same device, and solving the problems in the related art that the steel strip needs to be transferred and repositioned between devices and the standardization degree is low.

[0057] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A punching and shearing die for the busbar trunking terminal cover plate, characterized in that Comprising: An upper die base, a lower die base, and a die cavity located between the upper die base and the lower die base; the die cavity includes: a punch assembly connected below the upper die base and a female die connected above the lower die base; a plurality of female die holes adapted to the punch assembly are provided on the female die. Wherein, the punch assembly includes: A first punch, the first punch is located at the bottom of the upper die base and is used to shear the steel strip in the die cavity into blocky plates. A second punch, the second punch is located on one side of the first punch and is used to stamp one side plate of the terminal cover. A third punch, the third punch is located on the other side of the first punch and is used to stamp the other side plate of the terminal cover.

2. The punching and shearing die for the busbar trough terminal cover plate according to claim 1, wherein The first punch is of a rectangular plate structure and is perpendicular to the lower surface of the upper die base.

3. A punching and shearing die for a busbar trunking terminal cover plate according to claim 2, characterized in that, The second punch includes: a first strip-shaped die, a plurality of the first strip-shaped dies are linearly arranged along a direction parallel to the first punch to form a first strip-shaped die group. A first column die, two of the first column dies are respectively located at both ends of the first strip-shaped die group. A second strip-shaped die, a plurality of the second strip-shaped dies are arranged between the first punch and the first strip-shaped die group. The third punch includes: a third strip-shaped die, a plurality of the third strip-shaped dies are linearly arranged along a direction parallel to the first punch to form a third strip-shaped die group. A second column die, two of the second column dies are respectively located at both ends of the third strip-shaped die group. A fourth strip-shaped die, a plurality of the fourth strip-shaped dies are arranged between the first punch and the third strip-shaped die group.

4. A busbar trunking terminal cover plate punching and shearing die according to claim 3, characterized in that, The second punch and the third punch are symmetrically distributed with respect to the plane where the first punch is located.

5. A punching and shearing die for a busbar trunking terminal cover plate according to claim 1, characterized in that, A backing plate is provided between the punch assembly and the upper die base.

6. The punching and shearing die for the busbar trunking terminal cover plate according to claim 5, characterized in that, A pressure plate is provided on the side of the punch assembly close to the female die, and the lower surface of the punch assembly protrudes from the lower surface of the pressure plate.

7. A punching and shearing die for a busbar trunking end cover plate according to claim 6, characterized in that, A plurality of buffer pads are provided between the pressure plate and the backing plate.

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