Step stroke stamping device of parallel multi-groove liquid cooling plate and control method

Abstract

The invention relates to the technical field of liquid cooling plate stamping, and provides a step stroke stamping device of a parallel multi-groove liquid cooling plate and a control method. The step stroke stamping device comprises an upper die base, a lower die base, a plurality of punches and a plurality of elastic connecting pieces; the elastic connecting piece is fixedly arranged between the punch and the upper die holder; when the elastic connecting pieces are compressed, the lengths of the elastic connecting pieces can be changed, when the multiple elastic connecting pieces are in a natural state, the distances from the ends, away from the upper die base, of the punches to the lower die base are not completely the same, and when the multiple elastic connecting pieces are compressed to the minimum length, the distances from the ends, away from the lower die base, of the punches are not completely the same. The end, away from the upper die base, of each punch abuts against the lower die base. The multiple punches are arranged and fixed through the elastic connecting pieces, the multiple punches can sequentially abut against the heat dissipation plate in the machining process of the heating plate, the heat dissipation plate can reasonably slide, and the machining quality of the heat dissipation plate is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid cooling plate stamping, and in particular to a step-stroke stamping device and a control method for a parallel multi-slot liquid cooling plate. Background Art

[0002] The liquid cooling plate is a core component of the thermal management system and is widely used in the battery packs of new energy vehicles. Since there are several flow channels on the surface of the liquid cooling plate, in order to improve the processing efficiency of the liquid cooling plate, the liquid cooling plate is usually processed by stamping.

[0003] The utility model with announcement number CN216297642U discloses a high-speed thin-walled aluminum plate multi-groove stamping die, including a lower die bottom plate, a lower die pad, a lower template, a lower knife block assembly, an upper template, an upper die pad, an upper die bottom plate, and an upper knife block assembly. The upper knife block assembly includes a press plate, an upper press block, an upper knife fixing plate, and an upper knife block. The upper press block is provided with an avoidance hole. During the stamping process, the press plate is first compressed, and the upper knife fixing plate rises with the press plate in the initial stage of the press plate rising. The bottom of the upper press block is provided with a stamping portion protruding downward, and the avoidance hole passes through the stamping portion from top to bottom. The utility model utilizes the elastic connection between the press plate and the upper knife fixing plate, so that during the stamping process, the press plate is first compressed, and the upper knife fixing plate rises with the press plate in the initial stage of the press plate rising. The relative stroke between the upper knife block and the upper press block is small, and the heat is low during high-speed stamping, which increases the service life of the upper knife block and the upper press block, avoids the amount of aluminum powder adhering to the upper knife block, and improves the stamping quality.

[0004] In the above technical solution, in order to achieve the stamping of multiple grooves, multiple parallel upper knife blocks are set up, so that multiple upper knife blocks can stamp the plate at the same time. However, when multiple upper knife blocks stamp the plate at the same time, it will cause excessive thinning of the plate and even cracking, affecting the processing quality of the workpiece. Summary of the invention

[0005] In view of this, the present invention proposes a step-stroke stamping device and a control method for a parallel multi-slot liquid cooling plate, which can allow the heat sink to slide reasonably during stamping processing to ensure the processing quality of the heat sink.

[0006] The technical solution of the present invention is implemented as follows: On the one hand, the present invention provides a step-stroke stamping device for a parallel multi-slot liquid cooling plate, comprising an upper die base, a lower die base, a plurality of punches and a plurality of elastic connectors, wherein:

[0007] The lower die base is arranged on one side of the upper die base;

[0008] The punch is arranged between the upper die base and the lower die base, and a plurality of the punches are arranged in parallel and at intervals;

[0009] The elastic connecting member is fixedly arranged between the punch and the upper die seat and corresponds to the punch one by one;

[0010] When the elastic connector is compressed, its length can change. When the multiple elastic connectors are in a natural state, the distances from one end of each punch away from the upper die base to the lower die base are not exactly the same. When the multiple elastic connectors are compressed to the minimum length, one end of each punch away from the upper die base is in contact with the lower die base.

[0011] On the basis of the above technical solution, preferably, the elastic connecting member includes a first spring, and two ends of the first spring are respectively abutted against the upper die seat and the punch.

[0012] More preferably, the elastic connecting member further comprises two T-shaped plugs, which are respectively fixedly arranged on the upper die base and the punch; and the two ends of the first spring are respectively sleeved on the two T-shaped plugs and abutted against them.

[0013] More preferably, it also includes a guide plate, which is fixedly arranged on the upper die seat and slidably connected to the punch, and the T-shaped plug arranged at the end of the first spring away from the upper die seat is in contact with the guide plate.

[0014] More preferably, the punches are provided with three;

[0015] The upper die seat includes a base and a boss, the boss is integrally formed on a side of the base close to the lower die seat, the punch located in the middle is arranged on the boss, and the other two punches are arranged on the base.

[0016] More preferably, the distances between different positions on the upper mold base and the guide plate are equal, and when the first spring is in a natural state, the lengths of the plurality of first springs are equal; when the first spring is compressed to a minimum length, the lengths of the plurality of first springs are not completely equal.

[0017] On the basis of the above technical solution, preferably, it further comprises a pressing plate, the pressing plate comprises a frame plate, a sliding rod, a limiting plate and a second spring, wherein:

[0018] The punch is slidably arranged in the frame plate;

[0019] The sliding rod is fixedly arranged on the frame plate, and penetrates through and is slidably connected to the guide plate;

[0020] The limit plate is fixedly arranged on the slide bar and abuts against a side of the guide plate close to the upper die seat;

[0021] The second spring is disposed between the frame plate and the guide plate.

[0022] More preferably, the second spring is sleeved on the outside of the sliding rod.

[0023] On the basis of the above technical solution, preferably, a plurality of die grooves are formed on a side of the lower die base close to the upper die base, and the die grooves correspond to the punches one by one.

[0024] In a second aspect, the present invention provides a step stroke control method for a parallel multi-slot liquid cooling plate, using the step stroke stamping device for the parallel multi-slot liquid cooling plate, comprising the following steps:

[0025] S1, selecting the punch and the elastic connector of corresponding specifications and quantity according to the stamping requirements;

[0026] S2, fixing the lower die base on the table of the press, fixing the upper die base on the lifting rod of the press, and placing the heat sink on the lower die base;

[0027] S3, starting the press machine to drive the upper die seat to move downward, so that the plurality of punches punch the heat sink in sequence until the lower ends of all the punches are flush with each other, and the grooves on the surface of the heat sink are punched;

[0028] S4, controlling the press to drive the upper die seat to move upward;

[0029] S5, the heat sink is laterally moved according to the demand, and S3-S5 are repeated until the surface of the heat sink is processed.

[0030] The step-stroke stamping device and control method of a parallel multi-slot liquid cooling plate of the present invention have the following beneficial effects compared with the prior art:

[0031] (1) By providing a plurality of punches and fixing the punches with elastic connectors, the plurality of punches can be pressed against the heat sink in sequence during the processing of the heating plate, so that the heat sink can slide reasonably to ensure the processing quality of the heat sink;

[0032] (2) By setting a guide plate, the stable movement of the punch can be guaranteed, and by setting a pressure plate, the heat sink can be pre-fixed, thereby improving the ease of use of the punching device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a cross-sectional view of a step-stroke punching device of a parallel multi-slot liquid cooling plate of the present invention when the elastic connecting piece is in a natural state;

[0035] Figure 2 It is a cross-sectional view of a step-stroke punching device of a parallel multi-slot liquid cooling plate of the present invention when the elastic connecting piece is in a state of being compressed to a minimum length;

[0036] Figure 3 It is a cross-sectional view of an elastic connecting member in a step-stroke stamping device of a parallel multi-slot liquid cooling plate of the present invention;

[0037] Figure 4 It is a cross-sectional view of an upper die seat in a step-stroke stamping device for a parallel multi-slot liquid cooling plate of the present invention;

[0038] Figure 5 It is a cross-sectional view of a press plate in a step-stroke stamping device of a parallel multi-slot liquid cooling plate of the present invention;

[0039] Figure 6 It is a cross-sectional view of a liquid cooling plate in a step-stroke punching device and control method for a parallel multi-slot liquid cooling plate of the present invention;

[0040] Figure 7 A table of stroke and pressure data of different first springs in a step-stroke stamping control method for a parallel multi-slot liquid cooling plate of the present invention;

[0041] Figure 8 It is a schematic diagram of the stamping steps of a step-stroke stamping control method for a parallel multi-slot liquid cooling plate of the present invention.

[0042] Among them: 1. upper die seat; 11. base; 12. boss; 2. lower die seat; 201. die groove; 3. punch; 4. elastic connector; 41. first spring; 42. T-type plug; 5. guide plate; 6. pressure plate; 61. frame plate; 62. slide rod; 63. limit plate; 64. second spring. DETAILED DESCRIPTION

[0043] The following will be combined with the specific implementation of the present invention to clearly and completely describe the technical solution in the present invention. Obviously, the described implementation is only a part of the implementation of the present invention, not all of the implementation. Based on the implementation of the present invention, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] like Figure 1-8 As shown, a step-stroke stamping device for a parallel multi-slot liquid cooling plate of the present invention comprises an upper die base 1, a lower die base 2, a plurality of punches 3, a plurality of elastic connectors 4, a guide plate 5 and a pressing plate 6, which is used for stamping the multi-slot liquid cooling plate.

[0045] The upper die base 1 is used to be fixed on the telescopic rod of the press, and is lifted and moved along with the lifting and lowering of the telescopic rod of the press.

[0046] The lower die base 2 is used to support the liquid cooling plate. The lower die base 2 is arranged on one side of the upper die base 1 and is fixedly connected to the table top of the press.

[0047] The punch 3 is used to punch the flow channel of the liquid cooling plate. The punch 3 is arranged between the upper die base 1 and the lower die base 2. Multiple punches 3 are arranged in parallel and at intervals. The distance between two adjacent punches 3 can be adjusted according to actual processing requirements.

[0048] The elastic connector 4 is used to connect the punch 3 and the upper die base 1. The elastic connector 4 is fixedly arranged between the punch 3 and the upper die base 1 and corresponds to the punch 3 one by one. When the elastic connector 4 is compressed, its length can change, such as Figure 1 As shown, when the multiple elastic connectors 4 are in a natural state, the distances from one end of each punch 3 away from the upper die base 1 to the lower die base 2 are not completely the same. It is preferred that the distance between the punch 3 in the middle position and the lower die base 2 is the smallest, while the distances between the multiple punches 3 located on both sides and the lower die base 2 gradually increase, as shown in FIG. Figure 2 As shown, when the multiple elastic connectors 4 are compressed to the minimum length, the end of each punch 3 away from the upper die base 1 is in contact with the lower die base 2. At this time, the lower ends of the multiple punches 3 are flush; that is, when the elastic connector 4 is in a natural state, the lower ends of the multiple punches 3 are uneven, and when the elastic connector 4 is compressed to the minimum length, the lower ends of the multiple punches 3 are flush. With this structural design, the multiple punches 3 can be pressed against and punched in turn on the heat sink, so that the heat sink can slide laterally during the stamping process, avoiding the problem of excessive thinning or breakage of the heat sink caused by the multiple punches 3 squeezing the heat sink at the same time, thereby ensuring the processing quality of the heat sink.

[0049] As a preferred embodiment, the elastic connector 4 includes a first spring 41 and two T-shaped plugs 42. The first spring 41 is arranged between the upper die base 1 and the punch 3. The two T-shaped plugs 42 are fixedly arranged on the upper die base 1 and the punch 3, respectively. The two ends of the first spring 41 are respectively sleeved on the two T-shaped plugs 42 and abutted against them, so that the two ends of the first spring 41 respectively abut against the upper die base 1 and the punch 3, and when the elastic connector 4 is compressed under pressure, its length changes accordingly. In order to achieve the effect that the initial lengths of multiple elastic connectors 4 are equal, but the minimum lengths after compression are different, first springs 41 of different specifications can be selected, and T-shaped plugs 42 of different lengths can also be selected.

[0050] The guide plate 5 is used to guide the punch 3 to prevent it from deflecting during operation. The guide plate 5 is fixedly arranged on the upper die seat 1 and is slidably connected with the punch 3. The T-shaped plug 42 arranged at the end of the first spring 41 away from the upper die seat 1 is in contact with the guide plate 5. Figure 1 and Figure 2 As shown, during the process of the punch 3 punching the heat sink, the guide plate 5 is used to guide the punch 3 so that it can slide smoothly.

[0051] In some embodiments, three punches 3 are provided. When the elastic connectors 4 are in a natural state, the bottom end of the middle punch 3 is located below the bottom ends of the other two punches 3. Therefore, when punching the heat sink, the two middle punches 3 are allowed to abut against the heat sink first, allowing the left and right ends of the heat sink to shrink and slide toward the middle, thereby avoiding problems such as breakage of the heat sink caused by the three punches 3 abutting against the heat sink at the same time.

[0052] The specifications of the three punches 3 are preferably consistent. In order to make the bottom ends of the three punches 3 at different heights, the upper die base 1 is preferably set to a stepped shape, such as Figure 4 As shown, the upper die base 1 includes a base 11 and a boss 12 . The boss 12 is integrally formed on one side of the base 11 close to the lower die base 2 . The punch 3 located in the middle is arranged on the boss 12 , and the other two punches 3 are arranged on the base 11 .

[0053] like Figure 1 As shown, the shape of the guide plate 5 close to the upper die base 1 corresponds to the shape of the upper die base 1 close to the guide plate 5, the spacing between different positions on the upper die base 1 and the guide plate 5 is equal, and when the first spring 41 is in a natural state, the lengths of the plurality of first springs 41 are equal. When the first spring 41 is compressed to the minimum length, the lengths of the plurality of first springs 41 are not completely equal, that is, the number of turns and wire diameters of different first springs 41 are different, but the product of the pitch and the number of turns of each first spring 41 is equal.

[0054] The pressing plate 6 is used to pre-fix the heat sink, and the pressing plate 6 includes a frame plate 61, a slide bar 62, a limit plate 63 and a second spring 64. Figure 5 As shown, the punch 3 is slidably arranged in the frame plate 61, and the slide bar 62 is fixedly arranged on the frame plate 61, and penetrates and is slidably connected with the guide plate 5; the limit plate 63 is fixedly arranged on the slide bar 62 shown, and abuts against the side of the guide plate 5 close to the upper die seat 1; the second spring 64 is abutted between the frame plate 61 and the guide plate 5; when the press lifting rod drives the upper die seat 1 to move downward, the frame plate 61 can be allowed to contact and abut the heat sink first to prevent the heat sink from shaking, and then, as the upper die seat 1 continues to move downward, the second spring 64 will contract, thereby reducing the distance between the frame plate 61 and the upper die seat 1, so that the punch 3 contacts the heat sink, and when the upper die seat 1 moves upward, the elastic force of the second spring 64 can also be used to restore the frame plate 61 to its original position, thereby realizing continuous processing of the workpiece.

[0055] In order to improve the fixing firmness of the second spring 64 , it is preferred that the second spring 64 is sleeved on the outside of the sliding rod 62 .

[0056] In order to cooperate with the stamping of the heat sink, a plurality of die grooves 201 should be opened on the side of the lower die base 2 close to the upper die base 1, and the die grooves 201 correspond one-to-one to the punches 3 and correspond to the positions and specifications of the flow channels on the surface of the heat sink.

[0057] Figure 6 It is a cross-sectional view of the heat sink, wherein R is the radius of the groove, h is the depth of the groove, t is the plate thickness, R1 is the fillet radius, and L is the groove spacing. In some embodiments, t=1.4mm, R1≥t, L=4R. In order to prevent the heat sink from being stretched during the stamping process, it is preferred to reduce the stamping depth of the groove so that R≤h.

[0058] A step-stroke stamping control method for a parallel multi-slot liquid cooling plate of the present invention is as follows:

[0059] S1, select a punch 3 and an elastic connector 4 of corresponding specifications and quantity according to stamping requirements.

[0060] by Figure 1Taking the state shown as an example, the first springs 41 on both sides are the same and different from the first spring 41 in the middle. F1 is the relationship curve between the stroke and the elastic force of the first spring 41 in the middle, and F2 is the relationship curve between the stroke and the elastic force of the first springs 41 on both sides. Before the mold is closed, that is, when all the first springs 41 are in the natural state, at any stroke position, the elastic force F2 of the first springs 41 on both sides is less than the elastic force F1 of the first spring 41 in the middle. For example, when the stroke is Sr, Fr2 < Fr1. This is beneficial for the two sides of the heat dissipation plate to slide towards the middle, thus avoiding the fracture of the heat dissipation plate. Until after the mold is closed, that is, when all the first springs 41 are compressed to the minimum length, F2 = F1, and all the punches 3 are rigidly connected to the upper die holder 1, thereby improving the forming uniformity of the heat dissipation plate and being beneficial for reducing the warping deformation of the heat dissipation plate. Among them, S1 is the contraction stroke length of the first spring 41 in the middle, S2 is the contraction stroke length of the first springs 41 on both sides, and 1.5h < S1 < S2 < 2h, 1.5S1 < S2 < 2S1.

[0061] Of course, the number of punches 3 can be continuously increased, thereby improving the stamping efficiency. Preferably, the distance from the bottom end of the punch 3 to the lower die holder 2 first decreases and then increases, and is symmetrically arranged.

[0062] S2, fix the lower die holder 2 on the table of the press, fix the upper die holder 1 on the lifting rod of the press, and place the heat dissipation plate on the lower die holder 2.

[0063] S3, start the press, drive the upper die holder 1 to move downward, so that the multiple punches 3 sequentially stamp the heat dissipation plate until the lower ends of all the punches 3 are flush, and complete the stamping of the grooves on the surface of the heat dissipation plate.

[0064] S4, control the press to drive the upper die holder 1 to move upward.

[0065] S5, as Figure 8 shown, move the heat dissipation plate horizontally according to the requirements, and repeat S3 - S5 until the surface of the heat dissipation plate is completely processed.

[0066] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A step-stroke stamping device for a parallel multi-slot liquid cooling plate, characterized in that: It comprises an upper die base (1), a lower die base (2), a plurality of punches (3) and a plurality of elastic connecting members (4), wherein: The lower die base (2) is arranged on one side of the upper die base (1); The punch (3) is arranged between the upper die base (1) and the lower die base (2), and a plurality of the punches (3) are arranged in parallel and at intervals; The elastic connecting member (4) is fixedly arranged between the punch (3) and the upper die base (1), and corresponds one to one with the punch (3); When the elastic connecting member (4) is compressed, its length can change, wherein, when the plurality of elastic connecting members (4) are in a natural state, the distances from one end of each punch (3) away from the upper die base (1) to the lower die base (2) are not exactly the same; when the plurality of elastic connecting members (4) are compressed to a minimum length, one end of each punch (3) away from the upper die base (1) abuts against the lower die base (2).

2. A step-stroke punching device for a parallel multi-slot liquid cooling plate according to claim 1, characterized in that: The elastic connecting member (4) comprises a first spring (41), and two ends of the first spring (41) are respectively abutted against the upper die seat (1) and the punch (3).

3. A step-stroke punching device for a parallel multi-slot liquid cooling plate as claimed in claim 2, characterized in that: The elastic connecting member (4) further comprises two T-shaped plugs (42), wherein the two T-shaped plugs (42) are respectively fixedly arranged on the upper die base (1) and the punch (3); the two ends of the first spring (41) are respectively sleeved on the two T-shaped plugs (42) and abutted against them.

4. A step-stroke punching device for a parallel multi-slot liquid cooling plate as claimed in claim 3, characterized in that: It also includes a guide plate (5), which is fixedly arranged on the upper die seat (1) and slidably connected to the punch (3), and the T-shaped plug (42) arranged at the end of the first spring (41) away from the upper die seat (1) is in contact with the guide plate (5).

5. A step-stroke punching device for a parallel multi-slot liquid cooling plate as claimed in claim 4, characterized in that: The punches (3) shown are provided with three; The upper die seat (1) comprises a base (11) and a boss (12); the boss (12) is integrally formed on a side of the base (11) close to the lower die seat (2); the punch (3) located in the middle is arranged on the boss (12), and the other two punches (3) are arranged on the base (11).

6. A step-stroke punching device for a parallel multi-slot liquid cooling plate as claimed in claim 5, characterized in that: The distances between different positions on the upper die seat (1) and the guide plate (5) are all equal; when the first spring (41) is in a natural state, the lengths of the plurality of first springs (41) are equal; when the first spring (41) is compressed to a minimum length, the lengths of the plurality of first springs (41) are not completely equal.

7. The step-stroke punching device for a parallel multi-slot liquid cooling plate according to claim 4, characterized in that: It also includes a pressing plate (6), wherein the pressing plate (6) includes a frame plate (61), a sliding rod (62), a limiting plate (63) and a second spring (64), wherein: The punch (3) is slidably arranged in the frame plate (61); The sliding rod (62) is fixedly arranged on the frame plate (61), and penetrates through and is slidably connected to the guide plate (5); The limiting plate (63) is fixedly arranged on the sliding rod (62) and abuts against a side of the guide plate (5) close to the upper die seat (1); The second spring (64) is disposed between the frame plate (61) and the guide plate (5).

8. The step-stroke punching device for a parallel multi-slot liquid cooling plate according to claim 7, characterized in that: The second spring (64) is sleeved on the outside of the sliding rod (62).

9. The step-stroke punching device for a parallel multi-slot liquid cooling plate according to claim 1, characterized in that: A plurality of die grooves (201) are provided on one side of the lower die base (2) close to the upper die base (1), and the die grooves (201) correspond one to one with the punches (3).

10. A step stroke control method for a parallel multi-slot liquid cooling plate, using the step stroke punching device for a parallel multi-slot liquid cooling plate as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1, selecting the punch (3) and the elastic connector (4) of corresponding specifications and quantity according to stamping requirements; S2, fixing the lower die base (2) on the table of the press, fixing the upper die base (1) on the lifting rod of the press, and placing the heat sink on the lower die base (2); S3, starting the press machine to drive the upper die base (1) to move downward, so that the plurality of punches (3) punch the heat sink in sequence until the lower ends of all the punches (3) are flush with each other, and the grooves on the surface of the heat sink are punched; S4, controlling the press machine to drive the upper die base (1) to move upward; S5, the heat sink is laterally moved according to the demand, and S3-S5 are repeated until the surface of the heat sink is processed.

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