Forging die for battery pack support blank

Abstract

The utility model belongs to the technical field of forging dies, and particularly relates to a forging die for a battery pack support blank, which comprises an upper forging die and a lower forging die, an upper die pre-forging cavity comprises two upper pre-forging die cavities, and a lower die pre-forging cavity comprises two lower pre-forging die cavities in one-to-one correspondence with the two upper pre-forging die cavities. The pre-forging lower die cavity is provided with a large plane used for forming the long edge of a blank and a small plane used for forming the short edge of the blank, the large plane and the small plane are of a V-shaped structure, a first lower positioning groove is formed in the large plane, and a second lower positioning groove is formed in the small plane. The first lower positioning groove and the second lower positioning groove are used for clamping the two sides of the raw material bar, the effect that the raw material bar is accurately placed and positioned is achieved, it is guaranteed that the raw material bar cannot deflect in the pre-forging process, the folding defect is avoided, and therefore the chamfering procedure is omitted.

Description

Technical Field

[0001] The utility model belongs to the technical field of forging dies, and particularly relates to a forging die for a battery pack bracket blank. Background Art

[0002] A battery pack bracket is a fixing bracket for a battery pack in an electric vehicle or a hybrid vehicle. With the popularization of electric transportation means, the safe and stable fixation of the battery pack becomes particularly important. The bracket can ensure the stability and safety of the battery pack during vehicle driving by providing strong support and fixation functions.

[0003] The bracket is usually made of a strong metal material such as steel or aluminum alloy. This structure is in an L shape and has two mutually perpendicular support surfaces. One of the support surfaces is fixed on the vehicle chassis or body structure, and the other support surface is used to tightly fix the battery pack.

[0004] For manufacturing the blank of an aluminum alloy battery pack bracket, forging technology is usually selected. Forging refers to a workpiece or blank obtained by forging deformation of a metal blank. The forging process of the blank of the battery pack bracket mainly includes blanking → chamfering → heating → forging → trimming. The prior art usually adopts the one-step final forging method, which will produce large folding defects. And when using a raw material rod with a diameter of 52 mm, the rest of the product parts are filled completely, but the die cavity at the defect part is still in an unfilled state. This is mainly because of the special structure of the battery pack bracket, and the metal flow is hindered by the product shape. If the cavity is forcibly filled by increasing the raw material rod and the folding is extruded out of the cavity, a huge material cost will be incurred; moreover, due to the special shape of the product, it is difficult to place and position the raw material rod during forging, and the two ends of the raw material rod deflect into the cavity to generate folding defects. Therefore, the process of chamfering the raw material rod needs to be added before forging. If the length of the raw material rod is increased, a huge material cost will be incurred when the two ends of the raw material rod deflect into the cavity. Summary of the Utility Model

[0005] In view of this, in order to solve the problems existing in the prior art, the purpose of the utility model is to provide a forging die for a battery pack bracket blank, which solves the problems of difficult placement and positioning of the raw material rod during forging, preventing folding caused by deflection of the raw material rod, and solves the problem of low utilization rate caused by uneven material flow in all directions.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A forging die for a battery pack bracket blank, comprising: a forging upper die and a forging lower die arranged directly below the forging upper die, wherein the forging upper die and the forging lower die are provided with a pre-forging die cavity and a final forging die cavity for forging the blank, and the pre-forging die cavity comprises an upper die pre-forging cavity located in the forging upper die and a lower die pre-forging cavity located in the forging lower die;

[0008] The upper die pre-forging cavity comprises two pre-forging upper die cavities of the same shape, the two pre-forging upper die cavities are symmetrically arranged about the center of the upper die pre-forging cavity, the centers of the two pre-forging upper die cavities are respectively located on both sides of the center of the upper die pre-forging cavity, each of the pre-forging upper die cavities has a long side portion, a first upper material blocking groove is provided on the outer side of the long side portion, a second upper material blocking groove is provided on the outer side of one end of the two pre-forging upper die cavities away from each other, a first upper positioning groove is provided on one end of the two pre-forging upper die cavities away from each other, and a second upper positioning groove is provided on one end of the two pre-forging upper die cavities close to each other;

[0009] The lower die pre-forging cavity includes two pre-forging lower die cavities of identical shape, and the two pre-forging lower die cavities correspond one-to-one with the two pre-forging upper die cavities. Each of the pre-forging lower die cavities has a large plane for forming the long side of the blank and a small plane for forming the short side of the blank. The large plane and the small plane are arranged in a V-shaped structure, and a first lower positioning groove is provided on the large plane, and a second lower positioning groove is provided on the small plane. A first lower material blocking groove corresponding to the first upper material blocking groove is provided on the outer side of the large plane, and a second lower material blocking groove corresponding to the second upper material blocking groove is provided on the outer side of one end of the two pre-forging lower die cavities away from each other.

[0010] The specific technical effects are as follows: the pre-forging die cavity adopts a two-cavity design, which can meet the production of two pieces in one forging, thereby improving production efficiency; due to the special shape of the bracket blank, the flow resistance of the material to the short side is large during the pre-forging process, and the first upper material blocking groove and the first lower material blocking groove are provided, which can change the flow direction of the metal and facilitate the flow of the material from the long side to the short side; the second upper material blocking groove and the second lower material blocking groove are provided to assist in changing the flow direction of the metal, thereby avoiding the material flowing to the two ends instead of the short side during the pre-forging process, thereby further improving the material utilization rate; by The design adopts that the centers of the two pre-forging upper die cavities and the center of the upper die pre-forging cavity have an offset in the left and right directions. This can ensure that the raw material bar will not deflect during the pre-forging process, causing the two ends of the raw material bar to deflect into the cavity and produce folding defects. It can also save the process of chamfering the raw material bar. By setting the second upper positioning groove and the lower positioning groove, the raw material bar can be accurately placed and positioned. The first upper positioning groove is set at both ends. During the downward pressure process of the forging upper die, the two ends of the raw material bar can be pressed and tilted and can still be stuck in the first upper positioning groove, which plays a role in assisting the positioning of the raw material bar.

[0011] Further, the finish forging die cavity includes an upper die finish forging cavity located in the forging upper die and a lower die finish forging cavity located in the forging lower die.

[0012] Further, the upper die finish forging cavity includes two finish forging upper die cavities with the same shape, and the two finish forging upper die cavities are symmetrically arranged about the center of the upper die finish forging cavity.

[0013] Further, each finish forging upper die cavity is provided with a stepped hole.

[0014] The specific technical effect is that by adopting the design of the stepped hole, it is used to place the clamping column on the blank, and the design of the stepped hole can make the excess material part be extruded on the clamping column during the finish forging downward process, preventing the folding defect caused by the excess material part from occurring on the working surface of the blank.

[0015] Further, the lower die finish forging cavity includes two finish forging lower die cavities with the same shape, and the two finish forging lower die cavities are symmetrically arranged about the center of the lower die finish forging cavity and correspond to the two finish forging upper die cavities one by one.

[0016] The specific technical effect is that the finish forging die cavity adopts the design of two die cavities, which can meet the production of two pieces in one forging process and improve the production efficiency.

[0017] Further, each pre-forging upper die cavity has a short side part, and a V-shaped structure is arranged between the short side part and the long side part, and a fillet is formed at the connection between the short side part and the long side part.

[0018] The specific technical effect is that a fillet with a larger radius is set at the connection between the short side part and the long side part to make the material flow more smoothly and avoid forging defects such as large folding and material shortage here.

[0019] Further, a plane is formed at the connection between the short side part and the long side part.

[0020] The specific technical effect is that due to the special shape of the bracket blank, by adding a plane design at the connection between the short side part and the long side part, the material flow here is made more smooth, and the problem of coarse grain difference on the working plane can also be improved.

[0021] Further, it further includes: a lower spring, a lower inner top plate, a lower ejector rod, a lower outer top plate and a lower ejecting pad iron. The lower ejecting pad iron, the lower outer top plate and the lower inner top plate are sequentially arranged at the lower end of the forging lower die in the direction close to the forging upper die. One end of the lower spring extends into the forging lower die, the other end of the lower spring penetrates through the lower inner top plate and is connected to the lower outer top plate, one end of the lower ejector rod abuts against the lower outer top plate, and the other end of the lower ejector rod penetrates through the lower inner top plate and extends into the forging lower die.

[0022] Furthermore, it also includes: an upper spring, an upper inner top plate, an upper ejector rod, an upper outer top plate and an upper ejector washer, wherein the upper ejector washer, the upper outer top plate and the upper inner top plate are sequentially arranged at the upper end of the forging upper die in a direction close to the forging lower die, one end of the upper spring extends into the forging upper die, the other end of the upper spring passes through the upper inner top plate and is connected to the upper outer top plate, one end of the upper ejector rod abuts against the upper outer top plate, and the other end of the upper ejector rod passes through the upper inner top plate and extends into the forging upper die.

[0023] Furthermore, it also includes: a pressing block and a date stamp, wherein the pressing block and the date stamp are both arranged in the forging upper die, and the pressing block is against the date stamp.

[0024] The beneficial effects of the utility model are:

[0025] (1) By setting the first upper material blocking groove and the first lower material blocking groove, the metal flow direction can be changed, which is conducive to the material flowing from the long side to the short side; by setting the second upper material blocking groove and the second lower material blocking groove, the metal flow direction can be changed to avoid the material flowing to the two ends instead of the short side during the pre-forging process, thereby further improving the material utilization rate;

[0026] (2) By adopting a design in which the center of the two pre-forging upper die cavities and the center of the upper die pre-forging cavity are offset in the left and right directions, it can be ensured that the raw material bar will not be deflected during the pre-forging process, and the process of chamfering the raw material bar is saved. By setting the second upper positioning groove, the first lower positioning groove and the second lower positioning groove, the raw material bar can be accurately placed and positioned. The first upper positioning groove is set at both ends of the pre-forging die cavity. During the downward pressing process of the forging upper die, the two ends of the raw material bar can be pressed and tilted and can still be stuck in the first upper positioning groove, which plays a role in assisting the positioning of the raw material bar.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a structural schematic diagram of the utility model;

[0030] Figure 2 It is an explosion schematic diagram of the utility model;

[0031] Figure 3 is a schematic structural view of the forging upper die of the present utility model;

[0032] Figure 4 is a front view of the forging upper die of the present utility model;

[0033] Figure 5 is a schematic structural view of the forging lower die of the present utility model;

[0034] Figure 6 is a front view of the forging lower die of the present utility model;

[0035] Figure 7 is a front view of the present utility model;

[0036] Figure 8 is Figure 7 a sectional view taken along line A-A in

[0037] Figure 9 is Figure 6 a sectional view taken along line B-B in

[0038] Figure 10 is Figure 4 a sectional view taken along line C-C in

[0039] In the figure:

[0040] 1. Forging upper die; 2. Forging lower die; 3. Pre-forging upper die cavity; 4. First upper stock stop groove; 5. Second upper stock stop groove; 6. First upper positioning groove; 7. Second upper positioning groove; 8. Pre-forging lower die cavity; 9. First lower stock stop groove; 10. Second lower stock stop groove; 11. First lower positioning groove; 12. Finish-forging upper die cavity; 13. Step hole; 14. Finish-forging lower die cavity; 15. Fillet; 16. Plane; 17. Lower spring; 18. Lower inner top plate; 19. Lower ejector rod; 20. Lower outer top plate; 21. Lower ejector pad; 22. Upper spring; 23. Upper inner top plate; 24. Upper ejector rod; 25. Upper outer top plate; 26. Upper ejector pad; 27. Pressure block; 28. Date stamp; 29. First screw group; 30. Second screw group; 31. Third screw group; 32. Lower round pressing plate; 33. Large plane; 34. Small plane; 35. Second lower positioning groove; 36. Long side part; 37. Short side part. Detailed implementation manners

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0042] As Figures 1 to 10 shown, a forging die for a battery pack bracket blank includes a forging upper die 1 and a forging lower die 2 disposed directly below the forging upper die 1. A pre-forging die cavity and a final-forging die cavity for forging the blank are provided in the forging upper die 1 and the forging lower die 2. The pre-forging die cavity includes an upper die pre-forging cavity in the forging upper die 1 and a lower die pre-forging cavity in the forging lower die 2.

[0043] The upper die pre-forging cavity includes two pre-forging upper die cavities 3 with the same shape. The two pre-forging upper die cavities 3 are symmetrically arranged about the center of the upper die pre-forging cavity. The centers of the two pre-forging upper die cavities 3 are respectively located on both sides of the center of the upper die pre-forging cavity. Each pre-forging upper die cavity 3 has a long side portion 36. A first upper stock stop groove 4 is provided on the outer side of the long side portion 36. A second upper stock stop groove 5 is provided on the outer side of the mutually remote ends of the two pre-forging upper die cavities 3. A first upper positioning groove 6 is provided on the mutually remote ends of the two pre-forging upper die cavities 3. A second upper positioning groove 7 is provided on the mutually adjacent ends of the two pre-forging upper die cavities 3.

[0044] The lower die pre-forging cavity includes two pre-forging lower die cavities 8 with the same shape. The two pre-forging lower die cavities 8 correspond to the two pre-forging upper die cavities 3 one by one. Each pre-forging lower die cavity 8 has a large plane 33 for forming the long side of the blank and a small plane 34 for forming the short side of the blank. The large plane 33 and the small plane 34 are arranged in a V-shaped structure. A first lower positioning groove 11 is provided on the large plane 33. A second lower positioning groove 35 is provided on the small plane 34. A first lower stock stop groove 9 corresponding to the first upper stock stop groove 4 is provided on the outer side of the large plane 33. A second lower stock stop groove 10 corresponding to the second upper stock stop groove 5 is provided on the outer side of the mutually remote ends of the two pre-forging lower die cavities 8.

[0045] It should be noted here that: the pre-forging die cavity adopts a two-cavity design, which can meet the needs of producing two pieces in one forging, thereby improving production efficiency; due to the special shape of the bracket blank, the flow resistance of the material to the short side is large during the pre-forging process, and by setting the first upper material resistance groove 4 and the first lower material resistance groove 9, it can play a role in changing the flow direction of the metal, which is beneficial for the material to flow from the long side to the short side; by setting the second upper material resistance groove 5 and the second lower material resistance groove 10, it plays a role in assisting in changing the flow direction of the metal, avoiding the material flowing to the two ends instead of the short side during the pre-forging process, thereby further improving the material utilization rate; by adopting two pre-forging The design that the center of the upper die cavity 3 is located on both sides of the center of the upper die pre-forging cavity can ensure that the raw material bar will not deflect during the pre-forging process so that the two ends of the raw material bar will deflect into the cavity to produce folding defects, and can also save the process of chamfering the raw material bar. By setting the second upper positioning groove 7, the first lower positioning groove 11 and the second lower positioning groove 35, the raw material bar can be accurately placed and positioned. The first upper positioning groove 6 is set at both ends of the pre-forging cavity. During the downward pressing process of the forging upper die 1, the two ends of the raw material bar are pressed and tilted and can still be stuck in the first upper positioning groove 6, which plays a role in assisting the positioning of the raw material bar.

[0046] The radius of the first upper positioning groove 6 is equal to that of the second upper positioning groove 7 and is slightly larger than the radius of the raw material bar. The axis of the first upper positioning groove 6 and the axis of the second upper positioning groove 7 are collinear and located on the center plane of the upper die pre-forging cavity.

[0047] The radii of the first lower positioning groove 11 and the second lower positioning groove 35 are equal and slightly larger than the radius of the original material bar. The axes of the first lower positioning groove 11 and the second lower positioning groove 35 in the two pre-forging lower die cavities 8 are collinear and located on the center plane of the lower die pre-forging cavity.

[0048] The final forging die cavity comprises an upper die final forging cavity located at the forging upper die 1 and a lower die final forging cavity located at the forging lower die 2 .

[0049] The upper die final forging cavity comprises two upper die final forging cavities 12 of the same shape, and the two upper die final forging cavities 12 are symmetrically arranged about the center of the upper die final forging cavity.

[0050] Each final forging upper die cavity 12 is provided with a stepped hole 13 .

[0051] It should be noted here that: by adopting the design of the step hole 13, the clamping column on the blank is placed, and the design of the step hole 13 can squeeze the fleshy part on the clamping column during the final forging process, preventing the folding defects caused by the fleshy part from occurring on the working surface of the blank.

[0052] The stepped hole 13 includes a first part and a second part that are interconnected. The diameter of the first part is larger than that of the second part, and the first part is closer to the forging lower die 2 than the second part. During the forging process when the forging upper die 1 presses down, the excess material on the clamping column will be compressed and accumulated in the first part, rather than on the working surface, thus avoiding the generation of folding defects on the working plane 16.

[0053] The lower die finish forging cavity includes two finish forging lower die cavities 14 with the same shape, and the two finish forging lower die cavities 14 correspond to the two finish forging upper die cavities 12 one by one.

[0054] It should be noted here that: the design of using two die cavities for the finish forging die cavity can meet the production of two pieces in one forging process, improving production efficiency.

[0055] Each pre-forging upper die cavity 3 has a short side part 37, and a V-shaped structure is arranged between the short side part 37 and the long side part 36, and a fillet 15 is formed at the connection between the short side part 37 and the long side part 36.

[0056] It should be noted here that: setting a fillet 15 with a larger radius at the connection between the short side part 37 and the long side part 36 makes the material flow more smoothly, avoiding forging defects such as large folding and lack of material of the material at this place during forging.

[0057] A plane 16 is formed at the connection between the short side part 37 and the long side part 36.

[0058] It should be noted here that: due to the special shape of the bracket blank, by adding a design of an additional plane 16 at the connection between the short side part 37 and the long side part 36, the material flow here is made more smooth, and it can also improve the problem of coarse grain difference on the working plane 16, avoiding taking the coarse grain layer from the working plane 16 when sampling and testing the forged blank part after forging and forming.

[0059] It also includes: a lower spring 17, a lower inner top plate 18, a lower ejector rod 19, a lower outer top plate 20 and a lower ejector pad 21. The lower ejector pad 21, the lower outer top plate 20 and the lower inner top plate 18 are sequentially arranged at the lower end of the forging lower die 2 in the direction close to the forging upper die 1. One end of the lower spring 17 extends into the forging lower die 2, the other end of the lower spring 17 penetrates through the lower inner top plate 18 and is connected to the lower outer top plate 20, one end of the lower ejector rod 19 abuts against the lower outer top plate 20, and the other end of the lower ejector rod 19 penetrates through the lower inner top plate 18 and extends into the forging lower die 2.

[0060] It should be noted here that: the lower spring 17 is a red spring with a diameter of 25 mm and a length of 90 mm.

[0061] A round pressing plate is also arranged at the lower end of the forging lower die 2. The lower end of the round pressing plate penetrates through the lower outer top plate 20 and abuts against the lower end face of the lower inner top plate 18, and the upper end of the round pressing plate is connected to the forging lower die 2, playing a role in limiting the lower inner top plate 18.

[0062] Further included are: an upper spring 22, an upper inner top plate 23, an upper ejector rod 24, an upper outer top plate 25, and an upper ejecting pad iron 26. The upper ejecting pad iron 26, the upper outer top plate 25, and the upper inner top plate 23 are sequentially arranged at the upper end of the forging upper die 1 in the direction close to the forging lower die 2. One end of the upper spring 22 extends into the forging upper die 1, and the other end of the upper spring 22 penetrates through the upper inner top plate 23 and is connected to the upper outer top plate 25. One end of the upper ejector rod 24 abuts against the upper outer top plate 25, and the other end of the upper ejector rod 24 penetrates through the upper inner top plate 23 and extends into the forging upper die 1.

[0063] It should be noted here that: the upper ejecting pad iron 26 is installed on the upper outer top plate 25 through the first screw group 29.

[0064] Also included are: a pressing block 27 and a date stamp 28. The pressing block 27 and the date stamp 28 are both arranged in the forging upper die 1, and the pressing block 27 abuts against the date stamp 28.

[0065] It should be noted here that: the second screw group 30 extends into the pressing block 27 and abuts against the date stamp 28.

[0066] The specific working process of the present utility model is as follows:

[0067] First, release agent is sprayed on the two pre-forging lower die cavities 8; then a raw material rod is placed on the two pre-forging lower die cavities 8. Since there is an included angle between the large plane 33 and the small plane 34, the first lower positioning groove 11 and the second lower positioning groove 35 respectively clamp both sides of the raw material rod, so that the raw material rod is stably placed between the large plane 33 and the small plane 34, preventing the raw material rod from rotating;

[0068] The forging upper die 1 moves downward. Since one end where the two pre-forging upper die cavities 3 approach each other is higher than the end where the two pre-forging upper die cavities 3 move away from each other, the second positioning grooves first contact the raw material bar and get stuck on the raw material bar, and the two second positioning grooves respectively get stuck on both sides of the raw material bar. At this time, the forging upper die 1 continues to move downward, the middle of the raw material bar is pressed, and both ends will tilt upward, then both ends of the raw material bar are respectively stuck on the first upper positioning grooves 6, playing a role in assisting the positioning of the raw material bar and further preventing the raw material bar from rotating. During the pre-forging process, the raw material bar flows towards the short sides of the pre-forging lower die cavity 8 and the short sides of the pre-forging upper die cavity 3 under the combined action of the first upper material blocking groove 4, the second upper material blocking groove 5, the first lower material blocking groove 9, and the first lower material blocking groove 9. After pre-forging, the upper ejecting cushion block 26 drives the upper outer top plate 25 and the upper inner top plate 23 to move downward, and further makes the upper ejecting rod 24 move downward to eject the pre-forged blank from the pre-forging upper die cavity 3. At the same time, the lower ejecting cushion block 21 drives the lower outer top plate 20 and the lower inner top plate 18 to move upward, and further makes the lower ejecting rod 19 move upward to eject the pre-forged blank from the pre-forging lower die cavity 8. The forging upper die 1 moves upward, and the upper inner top plate 23 drives the upper ejecting cushion block 26, the upper outer top plate 25, and the upper ejecting rod 24 to reset under the action of the upper spring 22, and the lower inner top plate 18 drives the lower ejecting cushion block 21, the lower outer top plate 20, and the lower ejecting rod 19 to reset under the action of the lower spring 17.

[0069] Then the manipulator clamps and places the blank demolded from the pre-forging die cavity on the finish-forging lower die cavity 14, and the forging upper die 1 moves downward. The finish-forging upper die cavity 12 and the finish-forging lower die cavity 14 are closed to perform finish-forging on the blank. After finish-forging, the upper ejecting cushion block 26 drives the upper outer top plate 25 and the upper inner top plate 23 to move downward, and further makes the upper ejecting rod 24 move downward to eject the finish-forged blank from the finish-forging upper die cavity 12. At the same time, the lower ejecting cushion block 21 drives the lower outer top plate 20 and the lower inner top plate 18 to move upward, and further makes the lower ejecting rod 19 move upward to eject the finish-forged blank from the finish-forging lower die cavity 14. The forging upper die 1 moves upward, and the upper inner top plate 23 drives the upper ejecting cushion block 26, the upper outer top plate 25, and the upper ejecting rod 24 to reset under the action of the upper spring 22, and the lower inner top plate 18 drives the lower ejecting cushion block 21, the lower outer top plate 20, and the lower ejecting rod 19 to reset under the action of the lower spring 17. The forging process is completed.

[0070] In summary, the beneficial effects of the present utility model are as follows:

[0071] (1). By providing the first upper material blocking groove 4 and the first lower material blocking groove 9, it can play a role in changing the metal flow direction, facilitating the material to flow from the long side to the short side. By providing the second upper material blocking groove 5 and the second lower material blocking groove 10, it plays an auxiliary role in changing the metal flow direction, avoiding the situation that during pre-forging, the material flows towards both ends instead of flowing towards the short side, and further improving the material utilization rate.

[0072] (2) By adopting a design in which the center of the two pre-forging upper die cavities 3 and the center of the upper die pre-forging cavity are offset in the left and right directions, it can be ensured that the raw material bar will not be deflected during the pre-forging process, and the process of chamfering the raw material bar is saved. By setting the second upper positioning groove 7, the first lower positioning groove 11 and the second lower positioning groove 35, the raw material bar can be accurately placed and positioned. The first upper positioning groove 6 is set at both ends. During the downward pressing process of the forging upper die 1, the two ends of the raw material bar can be pressed and tilted and can still be stuck in the first upper positioning groove 6, which plays a role in assisting the positioning of the raw material bar.

[0073] The various devices selected in this application are all universal standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0074] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0076] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A forging die for a battery pack bracket blank, characterized in that: include: A forging upper die (1) and a forging lower die (2) arranged directly below the forging upper die (1), wherein the forging upper die (1) and the forging lower die (2) are provided with a pre-forging die cavity and a final forging die cavity for forging a blank, wherein the pre-forging die cavity comprises an upper die pre-forging cavity located at the forging upper die (1) and a lower die pre-forging cavity located at the forging lower die (2), wherein the upper die pre-forging cavity comprises two pre-forging upper die cavities (3) of the same shape, wherein the two pre-forging upper die cavities (3) are symmetrically arranged about the center of the upper die pre-forging cavity, and the centers of the two pre-forging upper die cavities (3) are respectively located on both sides of the center of the upper die pre-forging cavity; The lower die pre-forging cavity comprises two pre-forging lower die cavities (8) of identical shape, the two pre-forging lower die cavities (8) corresponding one to one with the two pre-forging upper die cavities (3), each of the pre-forging lower die cavities (8) having a large plane (33) for forming the long side of the blank and a small plane (34) for forming the short side of the blank, the large plane (33) and the small plane (34) being arranged in a V-shaped structure, the large plane (33) being provided with a first lower positioning groove (11), and the small plane (34) being provided with a second lower positioning groove (35).

2. A forging die for a battery pack bracket blank as claimed in claim 1, characterized in that: The final forging die cavity comprises an upper die final forging cavity located on the forging upper die (1) and a lower die final forging cavity located on the forging lower die (2); the upper die final forging cavity comprises two upper die final forging cavities (12) of identical shape; the two upper die final forging cavities (12) are symmetrically arranged about the center of the upper die final forging cavity; and each of the upper die final forging cavities (12) is provided with a step hole (13).

3. A forging die for a battery pack bracket blank as claimed in claim 2, characterized in that: The lower die final forging cavity comprises two final forging lower die cavities (14) of identical shape. The two final forging lower die cavities (14) are symmetrically arranged about the center of the lower die final forging cavity and correspond one-to-one to the two final forging upper die cavities (12).

4. A forging die for a battery pack bracket blank as claimed in claim 1, characterized in that: Each of the pre-forging upper die cavities (3) has a short side portion (37) and a long side portion (36), the short side portion (37) and the long side portion (36) are arranged in a V-shaped structure, and a rounded corner (15) is formed at the connection between the short side portion (37) and the long side portion (36).

5. A forging die for a battery pack bracket blank as claimed in claim 4, characterized in that: A plane (16) is also formed at the connection between the short side portion (37) and the long side portion (36).

6. A forging die for a battery pack bracket blank as claimed in claim 4, characterized in that: A first upper material blocking groove (4) is provided on the outer side of the long side portion (36), a second upper material blocking groove (5) is provided on the outer side of one end of the two pre-forging upper die cavities (3) away from each other, a first upper positioning groove (6) is provided on one end of the two pre-forging upper die cavities (3) away from each other, and a second upper positioning groove (7) is provided on one end of the two pre-forging upper die cavities (3) close to each other.

7. A forging die for a battery pack bracket blank as claimed in claim 6, characterized in that: A first lower material blocking groove (9) corresponding to the first upper material blocking groove (4) is provided on the outer side of the large plane (33), and a second lower material blocking groove (10) corresponding to the second upper material blocking groove (5) is provided on the outer side of one end of the two pre-forging lower die cavities (8) away from each other.

8. A forging die for a battery pack bracket blank as claimed in claim 1, characterized in that: Also includes: A lower spring (17), a lower inner top plate (18), a lower ejector rod (19), a lower outer top plate (20) and a lower ejector pad (21); the lower ejector pad (21), the lower outer top plate (20) and the lower inner top plate (18) are sequentially arranged at the lower end of the forging lower die (2) in a direction close to the forging upper die (1); one end of the lower spring (17) extends into the forging lower die (2); the other end of the lower spring (17) passes through the lower inner top plate (18) and is connected to the lower outer top plate (20); one end of the lower ejector rod (19) abuts against the lower outer top plate (20); the other end of the lower ejector rod (19) passes through the lower inner top plate (18) and extends into the forging lower die (2).

9. A forging die for a battery pack bracket blank as claimed in claim 1, characterized in that: Also includes: An upper spring (22), an upper inner top plate (23), an upper ejector rod (24), an upper outer top plate (25) and an upper ejector pad (26); the upper ejector pad (26), the upper outer top plate (25) and the upper inner top plate (23) are sequentially arranged at the upper end of the forging upper die (1) in a direction close to the forging lower die (2); one end of the upper spring (22) extends into the forging upper die (1); the other end of the upper spring (22) passes through the upper inner top plate (23) and is connected to the upper outer top plate (25); one end of the upper ejector rod (24) abuts against the upper outer top plate (25); the other end of the upper ejector rod (24) passes through the upper inner top plate (23) and extends into the forging upper die (1).

10. A forging die for a battery pack bracket blank as claimed in claim 1, characterized in that: Also includes: A pressing block (27) and a date stamp (28), wherein the pressing block (27) and the date stamp (28) are both arranged in the forging upper die (1), and the pressing block (27) abuts against the date stamp (28).

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