Anti-cracking stamping die for water-cooling plate

Abstract

The utility model discloses an anti-cracking stamping die for a water-cooling plate, and relates to the technical field of stamping dies, an upper die is provided with a male die, the male die is provided with a convex arc-shaped bending corner part, the convex arc-shaped bending corner part is provided with a convex arc-shaped surface, and a lower die is provided with a stamping U-shaped bending matching female die; the stamping U-shaped bending matching female die comprises a workpiece bearing piece and a stamping bending matching piece, and the stamping bending matching piece is provided with an inwards-concave arc-shaped side face. The lower die is further provided with a pre-bending assembly, the pre-bending assembly comprises a mounting base, a guide groove, a guide rod, a round roller and a second jacking spring, when the water-cooling plate is stamped and bent, pre-bending is conducted through the pre-bending assembly, then stamping bending and shape maintaining are conducted, the bending process is conducted in multiple times, and the bending efficiency is improved. Cracking and serious strain of the protection wing plates and the bent parts caused by a traditional stamping and bending mode are effectively prevented, and the overall heat dissipation effect of the water cooling plate is effectively ensured.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, and in particular to a water-cooled plate anti-crack stamping die. Background Technology

[0002] There are various ways to prepare water-cooled plates. The two most commonly used methods are: 1) Milling out coolant flow channels on a thicker water-cooled plate and then welding two water-cooled plates together by friction stir welding. The joint is an integral joint with a tight connection; 2) Stamping a thinner water-cooled plate to create a recessed area that forms the coolant flow channels, then covering it with another water-cooled plate and then riveting or spot welding it.

[0003] The water-cooled plate structure prepared by the second preparation method is as follows: Figure 1 As shown, a recessed portion 110 for forming a coolant flow channel is stamped out on the first water-cooled plate 100. Then, the second water-cooled plate 120, which serves as the base plate, is fitted onto the first water-cooled plate 100 and then riveted or spot-welded. Since riveting or spot welding cannot secure the joint edges of the first water-cooled plate 100 and the second water-cooled plate 120 together, the joint gap between the first water-cooled plate 100 and the second water-cooled plate 120 is prone to increase due to collisions at the joint edges during use. That is, when the joint edges are subjected to a large collision, leakage is likely to occur. Therefore, the edges of the second water-cooled plate 120, which serves as the base plate, are also stamped and bent to form a protective wing plate 130 that shields and protects the joint edges.

[0004] When the protective wing plate 130 is obtained by stamping and bending, the bending angle of the protective wing plate 130 is usually required to be within 90°±5°. However, using a traditional U-shaped stamping and bending die can easily cause cracks and severe damage to the protective wing plate 130 and the bent part 140, thereby affecting the overall heat dissipation effect of the water-cooled plate. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the aforementioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a water-cooled plate anti-crack stamping die, comprising an upper die and a lower die, the upper die having a punch, the left and / or right sides of the punch having an outwardly convex arc-shaped bending corner, the outwardly convex arc-shaped bending corner having an outwardly convex arc-shaped surface, characterized in that the lower die has a stamping U-shaped bending fitting die that cooperates with the punch; the stamping U-shaped bending fitting die includes a workpiece support and a stamping bending fitting component located on the left and / or right sides of the workpiece support, the stamping bending fitting component having an inwardly concave arc-shaped side surface for cooperating with the outwardly convex arc-shaped bending corner to bend the water-cooled plate into a bent portion; the lower die also has a component installed on the stamping... The pre-bending assembly on the bending fitting includes a mounting base installed on the stamping bending fitting. The mounting base is provided with guide grooves for left and right guidance, with the groove openings facing the workpiece support. Guide rods are slidably mounted on the guide grooves for left and right guidance. One end of the guide rods, extending out of the guide grooves, is connected to a circular roller arranged in front and behind. The portion of the outer circumference of the circular rollers near the workpiece support is located below the convex arc-shaped bending corner on the corresponding side. A second pressing spring is provided inside the guide groove. When the circular rollers move away from the workpiece support, the second pressing spring is pressed by the guide rods and the inner wall of the guide grooves, thereby generating elastic deformation.

[0007] As a further embodiment of this utility model, the proportion of the outer circumferential surface located below the outwardly convex arc-shaped bending corner of the roller is less than 1 / 2 of the outer circumferential surface.

[0008] As a further embodiment of this utility model: the lower mold also has a die backing plate, and the workpiece support is located above the die backing plate; multiple vertically arranged first guide posts are connected to the workpiece support, and a first guide hole that mates with the first guide posts is formed on the die backing plate; a first top pressure spring is provided between the workpiece support and the die backing plate.

[0009] As a further embodiment of this utility model: the lower mold also has a lower mold base and a die backing plate, the die backing plate is connected above the die backing plate, and the workpiece support is located above the die backing plate; multiple vertically arranged first guide posts are connected to the workpiece support, the die backing plate is formed with first guide holes that cooperate with the first guide posts, a first top pressure spring is provided between the workpiece support and the lower mold base, and the die backing plate is correspondingly provided with through holes adapted to the passage of the first top pressure spring.

[0010] As a further embodiment of this utility model: a front side plate and a rear side plate are connected to the die pad, and the front side plate and the rear side plate are provided with sliding grooves corresponding to the front and rear ends of the roller, and the sliding grooves are set for left and right guidance.

[0011] As a further embodiment of this utility model: the front-to-back distance between the front and rear side plates is a positioning distance adapted to the front-to-back width of the water-cooled plate for positioning the water-cooled plate in the front and back.

[0012] As a further embodiment of this utility model: a positioning block for positioning the water-cooled plate left and right is installed on the top of the mounting base.

[0013] Compared with the existing technology, the beneficial effects of this technical solution are as follows: when the water-cooled plate is stamped and bent, it is pre-bent by a pre-bending component, and then stamped and bent and shaped. This allows the bending process to be carried out in multiple stages, effectively preventing cracking and severe tearing of the protective wing plate and the bending part caused by the traditional stamping and bending method, and effectively ensuring the overall heat dissipation effect of the water-cooled plate.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the water-cooled plate structure;

[0017] Figure 2 This is a structural front view of the present invention;

[0018] Figure 3 This is a structural cross-sectional view of the present invention.

[0019] The corresponding labels in the attached diagram are explained as follows:

[0020] Upper die holder -1, punch pad -2, punch -3, outwardly convex arc-shaped bending corner -31, outwardly convex arc-shaped surface -311, lower die holder -4, die pad -5, stamping U-shaped bending mating die -6, workpiece support -61, stamping bending mating part -62, pre-bending assembly -63, first guide post -611, first guide hole -612, limit stop -613, first top pressure spring -614, inwardly concave arc-shaped side -621, mounting base -631, guide rod -632, round roller -633, front side plate -634, rear side plate -635, slide groove -636, positioning block -637.

[0021] First water-cooled plate -100, recessed part -110, second water-cooled plate -120, protective wing plate -130, bending part -140, flat part -150. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-3 A water-cooled plate anti-crack stamping die includes an upper die and a lower die, used for stamping and bending sheet metal, especially for stamping and bending water-cooled plates. The stamped and bent water-cooled plate (second water-cooled plate 120) has a flat plate portion 150, a vertically arranged protective wing plate 130 (or nearly vertically arranged), and a bending portion 140 connecting the flat plate portion 150 and the protective wing plate 130.

[0024] The upper die has an upper die base 1, a punch backing plate 2, and a punch 3. The punch 3 has outwardly convex arc-shaped bending corners 31 on both the left and right sides. The outwardly convex arc-shaped bending corners 31 have outwardly convex arc-shaped surfaces 311. The outwardly convex arc-shaped surfaces 311 are configured to make the bottom surface of the punch 3 and the corresponding left or right side surface of the punch 3 continuous. That is, the outwardly convex arc-shaped surface of the left outwardly convex arc-shaped bending corner makes the bottom surface of the punch and the left side surface of the punch continuous, and the outwardly convex arc-shaped surface of the right outwardly convex arc-shaped bending corner makes the bottom surface of the punch and the right side surface of the punch continuous.

[0025] The lower die includes a lower die base 4, a die backing plate 5, and a stamping U-shaped bending die 6 that mates with the punch. The stamping U-shaped bending die 6 includes a workpiece support 61 and two stamping bending fitting parts 62 located on the left and right sides of the workpiece support.

[0026] The workpiece support 61 is connected to a plurality of vertically arranged first guide posts 611, and the die pad 5 is formed with first guide holes 612 that cooperate with the first guide posts 611. The workpiece support 61 can be guided to move up and down by the guiding cooperation between the first guide posts 611 and the first guide holes 612.

[0027] In some embodiments, after the lower end of the first guide post 611 passes downward through the first guide hole 612, a limiting block 613 is connected to it. This is used to prevent the workpiece support from moving too high or coming off when the workpiece support 61 moves upward by abutting against the bottom side of the die pad 5.

[0028] In this embodiment, a first top-compression spring 614 is provided between the workpiece support 61 and the die pad 5, or a first top-compression spring is provided between the workpiece support and the lower die base.

[0029] The first top-pressure spring 614 is used to elastically press the workpiece support 61 so that when the punch 3 presses down on the workpiece on the workpiece support 61, it can elastically compress to absorb part of the impact energy. After the punch moves upward after the workpiece is punched and bent into a U-shape, the first top-pressure spring 614 presses the workpiece support 61 upward so that the punched workpiece can be ejected and demolded by the workpiece support 61.

[0030] In some embodiments, when the first top compression spring is disposed between the workpiece support and the lower die base, a through hole adapted to allow the first top compression spring to pass through is provided on the die pad.

[0031] The through hole serves as a positioning hole for the first compression spring to prevent it from deviating when compressed by the workpiece support and the lower die base.

[0032] In this embodiment, the stamping and bending fitting 62 has an inwardly concave arc-shaped side surface 621 for engaging with the outwardly convex arc-shaped bending corner portion 31 to bend the water-cooled plate into a bent portion. The inwardly concave arc-shaped side surface 621 is configured to form a continuity between the top surface of the stamping and bending fitting 62 and the side surface of the stamping and bending fitting 62 opposite to the workpiece support. That is, the inwardly concave arc-shaped side surface can be understood as being obtained by cutting off a portion of the top surface (or top) of the stamping and bending fitting and the side surface (or side portion) of the stamping and bending fitting opposite to the workpiece support.

[0033] After the punch 3 presses down on the workpiece on the workpiece support 61 and presses it into place, the lower edge of the concave arc-shaped side 621 is level with or basically level with the top surface of the workpiece support 61.

[0034] In this embodiment, the lower die also has a pre-bending assembly 63 mounted on the stamping and bending fitting 62. The pre-bending assembly 63 includes a mounting seat 631 mounted on the stamping and bending fitting 62. The mounting seat 631 is provided with a guide groove for left and right guidance, and the opening of the guide groove faces the workpiece support 61.

[0035] Guide rods 632 are provided in the guide groove for left and right guides. One end of the guide rod 632 extends out of the guide groove. The end of the guide rod 632 that extends out of the guide groove is connected to a circular roller 633 arranged in front and behind. The part of the outer circumference of the circular roller 633 near the workpiece support 61 (the right side of the circular roller on the left side of the workpiece support and the left side of the circular roller on the right side of the workpiece support) is located below the convex arc-shaped bending corner 31 on the corresponding side. The proportion of the outer circumference below the convex arc-shaped bending corner 31 is less than 1 / 2 of the outer circumference.

[0036] A second top-pressure spring is provided in the guide groove. When the roller 633 moves away from the workpiece support 31, the second top-pressure spring is pressed by the guide rod 632 and the inner wall of the guide groove, thereby generating elastic deformation.

[0037] When stamping and bending the water-cooled plate, first place the water-cooled plate on the left and right round rollers (when the round rollers are higher than the workpiece support), and make the water-cooled plate correspond to the workpiece support; or first place the water-cooled plate on the workpiece support 61 (when the workpiece support is higher than the round roller), and make the water-cooled plate correspond to the left and right round rollers 633.

[0038] Then, the upper mold base 1 is driven downward by the drive mechanism (not shown) on the mold, thereby driving the punch 3 to move downward. When moving downward, the water-cooled plate is first pressed onto the roller 633 by the outward convex arc-shaped bending corner 31, and the outer circumferential surface of the roller 633 near the workpiece support 61 cooperates with the outward convex arc-shaped surface 311 of the outward convex arc-shaped bending corner 31.

[0039] Because one side of the outer circumferential surface of the roller 633 is located below the convex arc-shaped bending angle 31, the proportion of the outer circumferential surface is less than 1 / 2 of the outer circumferential surface (less than 1 / 2 of the outer circumferential surface can be understood as an arc surface with an arc of less than 180°), the roller 633 is subjected to non-positive downward pressure. Furthermore, in order for the roller 633 to move away from the force of the workpiece support 61 through the guide rod 632 and guide groove, the pre-bending assembly 63 can form a force against the water-cooled plate as the punch 3 continuously presses down. During the pre-bending process, and under the elastic pressure of the second top pressure spring, when the punch 3 continues to descend and the outwardly convex arc-shaped bending corner 31 engages with the inwardly concave arc-shaped side 621 on the stamping and bending fitting 62 to stamp and bend the water-cooled plate and maintain its shape, the round roller 633 can press the protective wing plate 130 of the water-cooled plate against the corresponding left or right side of the outwardly convex arc-shaped bending corner 31, so that the angle of the protective wing plate 130 after stamping and bending can be maintained as close as possible to 85°-95°.

[0040] When the water-cooled plate is stamped and bent, it is pre-bent by the pre-bending component 63, and then stamped and bent and shaped. The bending process is carried out in multiple times, which effectively prevents the protective wing plate 130 and the bent part 140 from cracking and serious tearing caused by the traditional stamping and bending method, and effectively ensures the overall heat dissipation effect of the water-cooled plate.

[0041] In some embodiments, a front side plate 634 and a rear side plate 635 are connected to the die pad 5. The front side plate 634 and the rear side plate 635 are provided with slide grooves 636 corresponding to the front and rear ends of the roller 633. The slide grooves 636 are configured for left and right guidance.

[0042] In some embodiments, the length of the left and right guides of the groove 636 limits the amount of movement of the roller 633 toward the workpiece support 61. That is, when the roller 633 moves toward the workpiece support 61 to the point that the roller 633 abuts against the side wall of the groove 636, the outer circumferential surface of the roller 633 near the workpiece support 61 is located below the outwardly convex arc-shaped bend 31.

[0043] In some embodiments, the front-to-back distance between the front side panel 634 and the rear side panel 635 is a positioning distance adapted to the front-to-back width of the water-cooling plate for front-to-back positioning of the water-cooling plate. For example, the positioning distance is slightly larger than the front-to-back width of the water-cooling plate. For example, the difference between the positioning distance and the front-to-back width of the water-cooling plate is less than 1 cm.

[0044] In some embodiments, a positioning block 637 is installed on the top of the mounting base 631, and the positioning blocks 637 on the left and right sides of the mounting portion are used to position the water-cooled plate left and right.

[0045] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A water-cooled plate anti-crack stamping die, comprising an upper die and a lower die, the upper die having a punch, the left and / or right sides of the punch having outwardly convex arc-shaped bending corners, the outwardly convex arc-shaped bending corners having outwardly convex arc-shaped surfaces, characterized in that, The lower die has a U-shaped bending die that mates with the punch; The stamping U-shaped bending die includes a workpiece support and a stamping bending fitting part located on the left and / or right side of the workpiece support. The stamping bending fitting part has an inner concave arc-shaped side for engaging with the outwardly convex arc-shaped bending corner to bend the water-cooled plate into a bent portion. The lower die also has a pre-bending assembly mounted on the stamping and bending fitting. The pre-bending assembly includes a mounting base installed on a stamping and bending fitting. The mounting base is provided with a guide groove for left and right guidance. The opening of the guide groove faces the workpiece support. A guide rod is slidably mounted on the guide groove for left and right guidance. One end of the guide rod that passes through the guide groove is connected to a circular roller arranged in front and behind. The part of the outer circumference of the circular roller near the workpiece support is located below the convex arc-shaped bending corner on the corresponding side. A second top-pressure spring is installed inside the guide groove. When the roller moves away from the workpiece support, the second top-pressure spring is pressed by the guide rod and the inner wall of the guide groove, thereby generating elastic deformation.

2. The water-cooled plate anti-crack stamping die according to claim 1, characterized in that, The outer circumferential surface located below the outwardly convex arc-shaped bending corner of the roller accounts for less than 1 / 2 of the outer circumferential surface.

3. The water-cooled plate anti-crack stamping die according to claim 1 or 2, characterized in that, The lower die also has a die backing plate, and the workpiece support is located above the die backing plate; The workpiece support is connected to a plurality of vertically arranged first guide posts, and the die plate is formed with first guide holes that mate with the first guide posts. A first top pressure spring is provided between the workpiece support and the die plate.

4. The water-cooled plate anti-crack stamping die according to claim 1 or 2, characterized in that, The lower mold also has a lower mold base and a die backing plate. The die backing plate is connected above the die backing plate, and the workpiece support is located above the die backing plate. The workpiece support is connected to a plurality of vertically arranged first guide posts, and the die pad is formed with first guide holes that mate with the first guide posts. A first top pressure spring is provided between the workpiece support and the lower die base, and the die pad is provided with corresponding through holes adapted to allow the first top pressure spring to pass through.

5. The water-cooled plate anti-crack stamping die according to claim 1 or 2, characterized in that, The die pad is connected to a front side plate and a rear side plate. The front side plate and the rear side plate are provided with grooves corresponding to the front and rear ends of the roller. The grooves are designed to guide left and right.

6. The water-cooled plate anti-crack stamping die according to claim 5, characterized in that, The front and rear side panels are spaced to the front and rear widths of the water-cooled plate for positioning.

7. The water-cooled plate anti-crack stamping die according to claim 1, 2, or 6, characterized in that, The top of the mounting base is equipped with positioning blocks for left and right positioning of the water-cooled plate.

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