Cold heading forming die for stud sleeve of battery pack

Abstract

The utility model relates to the field of stud sleeve processing, and discloses a cold heading forming die for a stud sleeve of a battery pack, which comprises six groups of male dies and six groups of female dies, namely first, second, third, fourth, fifth and sixth station male dies and first, second, third, fourth, fifth and sixth station female dies, the six sets of male dies and the six sets of female dies are correspondingly installed on a multi-station bolt forming machine respectively, blanks are moved between the six sets of female dies and the six sets of female dies through a material clamping system of the forming machine, positioning hole pre-forming, head pre-forming, head forming and inner hole post-stretching are sequentially conducted on the blanks, and through hole forming and head edge cutting and position flattening are completed. According to the cold heading forming die, the battery pack stud sleeve is directly formed by the metal wire in a cold heading mode, the machining efficiency is high, the production efficiency is higher than 45 PCS / min, and produced products are high in consistency and stable in quality; in addition, machining is not needed, and the material utilization rate is high.

Description

Technical Field

[0001] The utility model relates to the field of stud sleeve processing, in particular to a cold heading forming die for a battery pack stud sleeve. Background Art

[0002] With the continuous improvement of the production, sales and penetration rate of new energy vehicles, lightweight design will be the development trend, and higher strength and better corrosion and fatigue resistance performance will become an important development direction for battery pack stud sleeves.

[0003] The stud sleeve is a key fastener for fixing the power battery on the box body. Most of the existing stud sleeves are produced in the form of cold heading blank + machining. This production method has problems such as low processing efficiency and unstable product quality. Therefore, it is necessary to improve the existing production method of stud sleeves to improve the processing efficiency and the stability of product quality. Summary of the Utility Model

[0004] The utility model aims to solve the technical problems existing in the prior art. For this purpose, the utility model provides a cold heading forming die for a battery pack stud sleeve with high processing efficiency and stable product quality.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] Provide a cold heading forming die for a battery pack stud sleeve, including six groups of male dies and six groups of female dies, namely the first, second, third, fourth, fifth, and sixth station male dies and the first, second, third, fourth, fifth, and sixth station female dies; the six groups of male dies and female dies are respectively installed on a multi-station bolt forming machine, and the blank is moved between the six groups of male dies and female dies through the blank clamping system of the forming machine, and the blank is successively subjected to pre-forming positioning holes, head pre-forming, head forming, inner hole post-stretching, completion of through holes, and head trimming and flattening.

[0007] In a preferred embodiment of the utility model, the first station male die includes a first-order initial punching sleeve, a first-order male die ejector rod, a first-order spacer block, and a first-order spacer sleeve, wherein: the first-order initial punching sleeve is installed on the forming machine; one end of the first-order male die ejector rod is arranged in the first-order initial punching sleeve, and the other end is used for extruding the blank located in the first station female die; the first-order spacer block is arranged in the first-order initial punching sleeve and is used for padding the first-order male die ejector rod; the first-order spacer sleeve is arranged at the tail of the first-order initial punching sleeve and is used for padding the first-order spacer block.

[0008] The first-station female die includes a first-pass through die, a first female die ejector rod, and a first female die ejector rod sleeve. Among them: The first-pass through die is installed on the forming machine relative to the first roughing sleeve, and a first-pass through die core is provided inside it for constraining the rod part of the blank. The first female die ejector rod is arranged inside the first-pass through die, and a punch for pre-forming the positioning hole of the blank is provided at its end, and it is also used to eject the pre-formed positioning hole part. The first female die ejector rod sleeve is used to fix the first female die ejector rod.

[0009] In a preferred embodiment of the present invention, the second-station male die includes a second fine blanking, a second male die ejector rod, a second spacer block, and a second spacer sleeve. Among them: The second fine blanking is installed on the forming machine, and a second fine blanking core is provided at its end, and a cavity for pre-forming the end face of the workpiece head is provided on the end face of the second fine blanking core. The second male die ejector rod is movably installed through the second fine blanking core inside the second fine blanking sleeve and can be used to eject the workpiece. The second spacer block is arranged inside the second fine blanking sleeve and is used to pad the second male die ejector rod. The second spacer sleeve is arranged at the tail of the second fine blanking sleeve and is used to pad the second spacer block.

[0010] The second-station female die includes a second female die sleeve, a second angle-reducing die, a second female die ejector rod, and a second female die ejector rod sleeve. Among them: The second female die sleeve is installed on the forming machine relative to the second fine blanking sleeve; the second angle-reducing die is installed inside the second female die sleeve, and an angle-reducing die core is provided inside it. A cavity for pre-forming the workpiece head is provided inside the angle-reducing die core, and together with the second fine blanking, it completes the head pre-forming of the workpiece. The second female die ejector rod is arranged inside the second angle-reducing die, and a punch for maintaining the shape of the workpiece positioning hole is provided at its end, and it is also used to eject the head pre-formed part. The second female die ejector rod sleeve is used to fix the second female die ejector rod.

[0011] In a preferred embodiment of the present invention, the third-station male die includes a third fine blanking sleeve, a third fine blanking ejector rod, a third spacer block, and a third spacer sleeve. Among them: The third fine blanking sleeve is installed on the forming machine; one end of the third fine blanking ejector rod is arranged inside the third fine blanking sleeve, and a punch for forming the counterbore of the workpiece head is provided at the other end. The third spacer block is arranged inside the third fine blanking sleeve and is used to pad the third fine blanking ejector rod. The third spacer sleeve is arranged at the tail of the third fine blanking sleeve and is used to pad the third spacer block.

[0012] The third-station female die includes a third-pass through die, a third female die ejector rod, and a third female die ejector rod sleeve. Among them: The third-pass through die is installed on the forming machine relative to the third fine blanking sleeve, and a through die core is provided at its end. A cavity for forming the workpiece head is provided inside the through die core. The third female die ejector rod is arranged inside the third-pass through die, and a punch for maintaining the shape of the workpiece positioning hole is provided at its end, and it is also used to eject the head formed part. The third female die ejector rod sleeve is used to fix the third female die ejector rod.

[0013] In a preferred embodiment of the present utility model, the male die of the fourth station includes a four-sequence fine blanking sleeve, a four-sequence oval punching rod, a four-sequence four-hole spacer, a four-sequence three-hole spacer, a four-sequence spacer sleeve, a four-sequence die back pad, a four-sequence push tube, a four-sequence ejector three pins, and a four-sequence ejector spacer, wherein: The four-sequence fine blanking sleeve is installed on the forming machine; The four-sequence oval punching rod is fixedly installed in the four-sequence fine blanking sleeve and is used to punch the counterbore at the head of the workpiece into an oval hole; The four-sequence four-hole spacer is arranged in the fine blanking sleeve and fixes the four-sequence oval punching rod; The four-sequence three-hole spacer is arranged in the fine blanking sleeve and is used to pad the four-sequence spacer and the four-sequence oval punching rod; The four-sequence spacer sleeve is arranged in the fine blanking sleeve and is used to pad the four-sequence three-hole spacer; The four-sequence die back pad is arranged at the tail of the four-sequence fine blanking sleeve and is used to pad the four-sequence spacer sleeve; The four-sequence push tube is sleeved on the four-sequence oval punching rod, and one end of it is movably arranged in the four-sequence fine blanking sleeve and is used to press the head shape of the workpiece and eject the workpiece; One end of the four-sequence ejector three pins is inserted into the holes of the four-hole spacer and the three-hole spacer and abuts against the four-sequence push tube; The four-sequence ejector spacer is arranged in the four-sequence fine blanking sleeve and abuts against the other end of the four-sequence ejector three pins.

[0014] The female die of the fourth station includes a four-sequence female die sleeve, a four-sequence movable female die, a four-sequence post-stretching oval punching rod, a four-sequence four-hole fixed seat, a four-sequence female die punching rod spacer, a four-sequence female die spacer, a four-sequence disc spring, a four-sequence post-push tube, a four-sequence ejector spacer, and a four-sequence ejector three-pin ejector rod, wherein: The four-sequence female die sleeve is installed on the forming machine opposite to the four-sequence fine blanking sleeve; The four-sequence movable female die is movably arranged in the four-sequence female die sleeve, and a four-sequence female die core for restricting the outer shape of the workpiece is arranged therein; One end of the four-sequence post-stretching oval punching rod is arranged in the four-sequence movable female die and is used to complete the stretching of the oval hole of the workpiece; The four-sequence four-hole fixed seat is fixedly installed at the tail of the four-sequence female die sleeve and is used to limit the four-sequence post-stretching oval punching rod; The four-sequence female die punching rod spacer is arranged in the four-sequence four-hole fixed seat and is used to pad the four-sequence post-stretching oval punching rod; The four-sequence female die spacer is arranged behind the four-sequence four-hole fixed seat and is used to pad the four-sequence female die punching rod spacer; The four-sequence disc spring is arranged in the four-sequence female die sleeve, one end abuts against the four-sequence movable female die, and the other end abuts against the four-sequence four-hole fixed seat and is used to support the four-sequence movable female die; The four-sequence post-push tube is sleeved on the four-sequence post-stretching oval punching rod, and one end of it is arranged in the four-sequence movable female die and is used to eject the post-stretched workpiece with an inner hole; The four-sequence ejector spacer is sleeved on the four-sequence post-stretching oval punching rod behind the four-sequence post-push tube; One end of the four-sequence ejector three-pin ejector rod penetrates through the four-sequence female die spacer, the four-sequence four-hole fixed seat and abuts against the four-sequence ejector spacer.

[0015] In a preferred embodiment of the present utility model, the male die of the fifth station includes a five - sequence fine blanking sleeve, a five - sequence waste fine blanking piece, a five - sequence hollow spacer block, and a five - sequence male die spacer block, where: The five - sequence fine blanking sleeve is installed on the forming machine; One end of the five - sequence waste fine blanking piece is fixed inside the five - sequence fine blanking sleeve, which is used to protect the head of the workpiece. It is provided with a through - hole for discharging waste, and a clamping notch for clamping the waste is arranged in the through - hole; The five - sequence hollow spacer block is arranged inside the five - sequence fine blanking sleeve and is used to pad the five - sequence waste fine blanking piece; The five - sequence male die spacer block is arranged at the tail of the five - sequence fine blanking sleeve and is used to pad the five - sequence hollow spacer block. Moreover, the five - sequence male die spacer block is provided with a waste groove for discharging waste.

[0016] The female die of the fifth station includes a five - sequence female die sleeve, a five - sequence movable straight - through die, a five - sequence post - stretching elliptical punching rod, a five - sequence four - hole fixed seat, a five - sequence female die punching rod spacer block, a five - sequence female die spacer block, a five - sequence disc spring, a five - sequence post - push tube, a five - sequence push - out spacer block, and a five - sequence push - out three - needle ejector rod, where: The five - sequence female die sleeve is installed on the forming machine opposite to the five - sequence fine blanking sleeve; The five - sequence movable straight - through die is movably arranged inside the five - sequence female die sleeve, and a five - sequence female die core for restricting the outer shape of the workpiece is arranged inside it; One end of the five - sequence post - stretching elliptical punching rod is arranged inside the five - sequence movable straight - through die and is used to complete the elliptical through - hole of the workpiece; The five - sequence four - hole fixed seat is fixedly installed at the tail of the five - sequence female die sleeve and is used to limit the five - sequence post - stretching elliptical punching rod; The five - sequence female die punching rod spacer block is arranged inside the five - sequence four - hole fixed seat and is used to pad the five - sequence post - stretching elliptical punching rod; The five - sequence female die spacer block is arranged behind the five - sequence four - hole fixed seat and is used to pad the five - sequence female die punching rod spacer block; The five - sequence disc spring is arranged inside the five - sequence female die sleeve, with one end abutted against the five - sequence movable straight - through die and the other end abutted against the five - sequence four - hole fixed seat, which is used to support the five - sequence movable straight - through die; The five - sequence post - push tube is sleeved on the five - sequence post - stretching elliptical punching rod, and one end is arranged inside the five - sequence movable straight - through die and is used to push out the workpiece with the through - hole completed; The five - sequence push - out spacer block is sleeved on the five - sequence post - stretching elliptical punching rod behind the five - sequence post - push tube; One end of the five - sequence push - out three - needle ejector rod penetrates through the five - sequence female die spacer block, the five - sequence four - hole fixed seat and abuts against the five - sequence push - out spacer block.

[0017] In a preferred embodiment of the present utility model, the male die of the sixth station includes a six - sequence trimming die sleeve and a six - sequence trimming male die; The six - sequence trimming die sleeve is fixed on the forming machine; The six - sequence trimming male die is arranged inside the six - sequence trimming die sleeve and is used for forming the flat position of the workpiece.

[0018] The sixth-station female die includes a six-sequence female die sleeve, a six-sequence trimming female die, a six-sequence round die core, a six-sequence female die pad sleeve, a six-sequence female die ejector rod, and a six-sequence female die ejector rod sleeve, where: The six-sequence female die sleeve is installed on the forming machine relative to the six-sequence trimming die sleeve; The six-sequence trimming female die is arranged inside the six-sequence female die sleeve and is used for forming the flat position of the product; The six-sequence round die core is arranged inside the six-sequence trimming female die and is used to protect the workpiece; The six-sequence female die pad sleeve is arranged inside the six-sequence female die sleeve and is used to pad the six-sequence trimming female die and the six-sequence round die core; The six-sequence female die ejector rod is arranged inside the six-sequence female die pad sleeve and is used to push out the head flat-position trimming formed part; The six-sequence female die ejector rod sleeve is used to fix the six-sequence female die ejector rod.

[0019] Compared with the prior art, the beneficial effects of the present utility model are:

[0020] The present utility model directly forms the battery pack stud sleeve from metal wire by cold heading using a cold heading forming die, with high processing efficiency, a production efficiency greater than 45 PCS / min, and high consistency and stable quality of the produced products; In addition, no machining is required, and the material utilization rate is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0022] Figure 1 is the installation state diagram of the first-station male die and the first-station female die provided by the present utility model on the forming machine;

[0023] Figure 2 is the processing and forming diagram of the blank at the first station provided by the present utility model;

[0024] Figure 3 is Figure 2 the right view provided;

[0025] Figure 4 is the installation state diagram of the second-station male die and the second-station female die provided by the present utility model on the forming machine;

[0026] Figure 5 is the processing and forming diagram of the blank at the second station provided by the present utility model;

[0027] Figure 6 is Figure 2 the right view provided;

[0028] Figure 7 is the installation state diagram of the third-station male die and the third-station female die provided by the present utility model on the forming machine;

[0029] Figure 8 is the processing and forming diagram of the blank at the third station provided by the present utility model;

[0030] Figure 9 is Figure 8 the left view provided;

[0031] Figure 10 is Figure 8 the right view provided;

[0032] Figure 11 is the installation state diagram of the male die at the fourth station and the female die at the fourth station on the molding machine provided by the present utility model;

[0033] Figure 12 is the processing and forming diagram of the blank at the fourth station provided by the present utility model;

[0034] Figure 13 is Figure 12 the left view provided;

[0035] Figure 14 is the installation state diagram of the male die at the fifth station and the female die at the fifth station on the molding machine provided by the present utility model;

[0036] Figure 15 is the processing and forming diagram of the blank at the fifth station provided by the present utility model;

[0037] Figure 16 is Figure 15 the left view provided;

[0038] Figure 17 is the installation state diagram of the male die at the sixth station and the female die at the sixth station on the molding machine provided by the present utility model;

[0039] Figure 18 is the processing and forming diagram of the blank at the sixth station provided by the present utility model;

[0040] Figure 19 is Figure 18 the left view provided;

[0041] In the drawings, the list of components represented by each reference numeral is as follows: Detailed implementation manners

[0042] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0043] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0044] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 construed as a limitation to the present utility model.

[0045] In addition, the descriptions involving the terms "first", "second", etc. in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. The terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0046] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions results in contradictions or cannot be realized, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0047] Embodiment 1

[0048] This embodiment provides a cold heading forming die for a battery pack stud sleeve, which includes six groups of male dies and six groups of female dies, namely the first, second, third, fourth, fifth, and sixth station male dies and the first, second, third, fourth, fifth, and sixth station female dies corresponding to the first, second, third, fourth, fifth, and sixth station male dies; the six groups of male dies and female dies are respectively installed on a multi-station bolt forming machine, and the blank is moved between the six groups of male dies and female dies through the blank clamping system of the forming machine, and the blank is successively preformed with a positioning hole, head preformed, head formed, inner hole post-stretched, through hole completed, and head trimmed and flattened.

[0049] As shown in the attachment Figure 1 As shown, the male die 1A at the first station includes a first-stage rough punching sleeve 1A.1, a first-stage male die ejector rod 1A.2, a first-stage spacer block 1A.3, and a first-stage spacer sleeve 1A.4, where: The first-stage rough punching sleeve is installed on the molding machine; One end of the first-stage male die ejector rod is arranged inside the first-stage rough punching sleeve, and the other end is used to extrude the blank located inside the female die at the first station; The first-stage spacer block is arranged inside the first-stage rough punching sleeve and is used to pad the first-stage male die ejector rod; The first-stage spacer sleeve is arranged at the tail of the first-stage rough punching sleeve and is used to pad the first-stage spacer block.

[0050] As shown in the attachment Figure 1 As shown, the female die 1B at the first station includes a first-stage straight-through die 1B.1, a first-stage female die ejector rod 1B.2, and a first-stage female die ejector rod sleeve 1B.3, where: The first-stage straight-through die is installed on the molding machine opposite to the first-stage rough punching sleeve, and a first-stage straight-through die core is arranged inside it, which is used to restrain the rod part of the blank; The first-stage female die ejector rod is arranged inside the first-stage straight-through die, and a punch for pre-forming the positioning hole of the blank is provided at its end, and it is also used to eject the pre-formed positioning hole part; The first-stage female die ejector rod sleeve is used to fix the first-stage female die ejector rod.

[0051] When pre-forming the positioning hole at the first station, the blank is sent to the die orifice of the female die at the first station by the blank clamping system of the molding machine. When the main slider of the molding machine moves towards the female die at the first station, the blank is pushed into the first-stage straight-through die under the action of the male die at the first station. The main slider continues to move forward to the frontmost point, and the material is compressed and deformed. The pre-forming of the positioning hole on the end face of the rod part of the blank is jointly completed by the first-stage male die ejector rod, the first-stage straight-through die, and the first-stage female die ejector rod. The pre-formed part is as shown in the attachment Figure 2 and the attachment Figure 3 as shown.

[0052] As shown in the attachment Figure 4 As shown, the male die 2A at the second station includes a second-stage fine blanking 2A.1, a second-stage male die ejector rod 2A.2, a second-stage spacer block 2A.3, and a second-stage spacer sleeve 2A.4, where: The second-stage fine blanking is installed on the molding machine, and a second-stage fine blanking core is arranged at its end, and a cavity for pre-forming the end face of the head of the workpiece is arranged on the end face of the second-stage fine blanking core; The second-stage male die ejector rod is movably installed through the second-stage fine blanking core inside the second-stage fine blanking sleeve and can be used to eject the workpiece; The second-stage spacer block is arranged inside the second-stage fine blanking sleeve and is used to pad the second-stage male die ejector rod; The second-stage spacer sleeve is arranged at the tail of the second-stage fine blanking sleeve and is used to pad the second-stage spacer block.

[0053] As shown in the attachment Figure 4As shown, the female die 2B at the second station includes a second-order female die sleeve 2B.1, a second-order corner-shrinking die 2B.2, a second-order female die ejector rod 2B.3, and a second-order female die ejector rod sleeve 2B.4, where: The second-order female die sleeve is installed on the forming machine relative to the second-order fine blanking sleeve; The second-order corner-shrinking die is installed inside the second-order female die sleeve, and a corner-shrinking die core is provided therein. A cavity for pre-forming the head of the workpiece is provided inside the corner-shrinking die core, and together with the second-order fine blanking, it completes the head pre-forming of the workpiece; The second-order female die ejector rod is arranged inside the second-order corner-shrinking die, and a punch for maintaining the shape of the positioning hole of the workpiece is provided at its end, and it is also used to eject the head pre-formed part; The second-order female die ejector rod sleeve is used to fix the second-order female die ejector rod.

[0054] During the head pre-forming at the second station, the blank holding system of the forming machine sends the blank to the die orifice of the female die at the second station. When the main slider of the forming machine moves towards the female die at the second station, the blank is pushed into the second-order corner-shrinking die under the action of the male die at the second station. The main slider continues to move forward to the frontmost point, and the material is compressed and deformed. The second-order fine blanking, the second-order male die ejector rod, the second-order corner-shrinking die, and the second-order female die ejector rod jointly complete the pre-forming of the head of the blank and the maintenance of the shape of the rod part. The head pre-formed part is as shown in Attachment Figure 5 and Attachment Figure 6 shown.

[0055] As shown in Attachment Figure 7 shown, the male die 3A at the third station includes a third-order fine blanking sleeve 3A.1, a third-order fine blanking ejector rod 3A.2, a third-order spacer block 3A.3, and a third-order spacer sleeve 3A.4, where: The third-order fine blanking sleeve is installed on the forming machine; One end of the third-order fine blanking ejector rod is arranged inside the third-order fine blanking sleeve, and a punch for forming the counterbore of the head of the workpiece is provided at the other end; The third-order spacer block is arranged inside the third-order fine blanking sleeve and is used to pad the third-order fine blanking ejector rod; The third-order spacer sleeve is arranged at the tail of the third-order fine blanking sleeve and is used to pad the third-order spacer block.

[0056] As shown in Attachment Figure 7 shown, the female die 3B at the third station includes a third-order through die 3B.1, a third-order female die ejector rod 3B.2, and a third-order female die ejector rod sleeve 3B.3, where: The third-order through die is installed on the forming machine relative to the third-order fine blanking sleeve, and a through die core is provided at its end. A cavity for forming the head of the workpiece is provided inside the through die core; The third-order female die ejector rod is arranged inside the third-order through die, and a punch for maintaining the shape of the positioning hole of the workpiece is provided at its end, and it is also used to eject the head formed part; The third-order female die ejector rod sleeve is used to fix the third-order female die ejector rod.

[0057] When the head of the third station is being formed, the clamping system of the forming machine sends the blank to the die mouth of the third station female die. When the main slide of the forming machine moves toward the third station female die, the blank is pushed into the three-sequence straight-through die under the action of the third station male die. The main slide continues to move forward to the front point, and the material is compressed and deformed. The three-sequence fine punching ejector, the three-sequence straight-through die, and the three-sequence female die ejector jointly complete the forming of the blank head and the maintenance of the rod shape. The head formed part is shown in the attached figure. Figure 8 To Attachment Figure 10 shown.

[0058] As attached Figure 11 As shown, the fourth station male mold 4A includes a four-sequence fine punching sleeve 4A.1, a four-sequence elliptical punch rod 4A.2, a four-sequence four-hole cushion block 4A.3, a four-sequence three-hole cushion block 4A.4, a four-sequence cushion sleeve 4A.5, a four-sequence punch die back pad 4A.6, a four-sequence push tube 4A.7, a four-sequence push-out three-needle 4A.8 and a four-sequence push-out cushion block 4A.9, wherein: the four-sequence fine punching sleeve is installed on the forming machine; the four-sequence elliptical punch rod is fixedly installed in the four-sequence fine punching sleeve, and is used to punch the countersunk hole of the workpiece head into an elliptical hole; the four-sequence four-hole cushion block is arranged in the fine punching sleeve, and fixes the four-sequence elliptical punch rod. Rod; the four-series three-hole pad is arranged in the fine blanking sleeve to pad the four-series pad and the four-series elliptical punch rod; the four-series pad sleeve is arranged in the fine blanking sleeve to pad the four-series three-hole pad; the four-series punch rear pad is arranged at the tail of the four-series fine blanking sleeve to pad the four-series pad sleeve; the four-series push tube sleeve is arranged on the four-series elliptical punch rod, one end of which is movably arranged in the four-series fine blanking sleeve to press the workpiece head shape and push out the workpiece; one end of the four-series push three needles is inserted into the holes of the four-hole pad and the three-hole pad and abuts against the four-series push tube; the four-series push pad is arranged in the four-series fine blanking sleeve and supports the other end of the four-series push three needles.

[0059] As attached Figure 11As shown in the figure, the female die 4B at the fourth station includes a four-sequence female die sleeve 4B.1, a four-sequence movable female die 4B.2, a four-sequence post-stretching elliptical punching rod 4B.3, a four-sequence four-hole fixed seat 4B.4, a four-sequence female die punching rod spacer 4B.5, a four-sequence female die spacer 4B.6, a four-sequence disc spring 4B.7, a four-sequence post-pushing tube 4B.8, a four-sequence pushing-out spacer 4B.9, and a four-sequence pushing-out three-pin ejector rod 4B.10, where: The four-sequence female die sleeve is installed on the forming machine relative to the four-sequence fine blanking sleeve; The four-sequence movable female die is movably arranged inside the four-sequence female die sleeve, and a four-sequence female die core for restricting the outer shape of the workpiece is provided therein; One end of the four-sequence post-stretching elliptical punching rod is arranged inside the four-sequence movable female die for completing the stretching of the elliptical hole of the workpiece; The four-sequence four-hole fixed seat is fixedly installed at the tail of the four-sequence female die sleeve for limiting the four-sequence post-stretching elliptical punching rod; The four-sequence female die punching rod spacer is arranged inside the four-sequence four-hole fixed seat for padding the four-sequence post-stretching elliptical punching rod; The four-sequence female die spacer is arranged behind the four-sequence four-hole fixed seat for padding the four-sequence female die punching rod spacer; The four-sequence disc spring is arranged inside the four-sequence female die sleeve, with one end abutted against the four-sequence movable female die and the other end abutted against the four-sequence four-hole fixed seat for supporting the four-sequence movable female die; The four-sequence post-pushing tube is sleeved on the four-sequence post-stretching elliptical punching rod, and one end is arranged inside the four-sequence movable female die for pushing out the post-stretched workpiece of the inner hole; The four-sequence pushing-out spacer is sleeved on the four-sequence post-stretching elliptical punching rod behind the four-sequence post-pushing tube; One end of the four-sequence pushing-out three-pin ejector rod penetrates through the four-sequence female die spacer, the four-sequence four-hole fixed seat and abuts against the four-sequence pushing-out spacer.

[0060] During the post-stretching of the inner hole at the fourth station, the blank holding system of the forming machine sends the blank to the die orifice of the female die at the fourth station. When the main slider of the forming machine moves towards the female die at the fourth station, the blank is pushed into the four-sequence movable female die under the action of the male die at the fourth station. The main slider continues to move forward, and the four-sequence elliptical punching rod compresses the four-sequence disc spring to complete the stretching of the elliptical hole of the workpiece. The depth and diameter of the elliptical hole of the product meet the requirements. The head shape of the workpiece is maintained jointly by the four-sequence elliptical punching rod, the four-sequence push rod, and the four-sequence movable female die. The post-stretched forming part of the inner hole is as shown in Attachment Figure 12 and Attachment Figure 13 shown.

[0061] As shown in Attachment Figure 14 shown, the male die 5A at the fifth station includes a five-sequence fine blanking sleeve 5A.1, a five-sequence waste fine blanking 5A.2, a five-sequence hollow spacer 5A.3, and a five-sequence male die spacer 5A.4, where: The five-sequence fine blanking sleeve is installed on the forming machine; One end of the five-sequence waste fine blanking is fixed inside the five-sequence fine blanking sleeve for protecting the head of the workpiece, and a through hole for discharging waste is provided therein, and a bayonet for clamping the waste is provided inside the through hole; The five-sequence hollow spacer is arranged inside the five-sequence fine blanking sleeve for padding the five-sequence waste fine blanking; The five-sequence male die spacer is arranged at the tail of the five-sequence fine blanking sleeve for padding the five-sequence hollow spacer, and a waste groove for discharging waste is provided on the five-sequence male die spacer.

[0062] As shown in Attachment Figure 14As shown in the figure, the female die 5B at the fifth station includes a five-sequence female die sleeve 5B.1, a five-sequence movable through die 5B.2, a five-sequence post-stretching elliptical punching rod 5B.3, a five-sequence four-hole fixing seat 5B.4, a five-sequence female die punching rod spacer 5B.5, a five-sequence female die spacer 5B.6, a five-sequence disc spring 5B.7, a five-sequence post-pushing tube 5B.8, a five-sequence pushing-out spacer 5B.9, and a five-sequence pushing-out three-pin ejector rod 5B.10. Among them: The five-sequence female die sleeve is installed on the molding machine relative to the five-sequence fine blanking sleeve; The five-sequence movable through die is movably arranged inside the five-sequence female die sleeve, and a five-sequence female die core for restricting the outer shape of the workpiece is arranged therein; One end of the five-sequence post-stretching elliptical punching rod is arranged inside the five-sequence movable through die for completing the elliptical through hole of the workpiece; The five-sequence four-hole fixing seat is fixedly installed at the tail of the five-sequence female die sleeve for limiting the five-sequence post-stretching elliptical punching rod; The five-sequence female die punching rod spacer is arranged inside the five-sequence four-hole fixing seat for padding the five-sequence post-stretching elliptical punching rod; The five-sequence female die spacer is arranged behind the five-sequence four-hole fixing seat for padding the five-sequence female die punching rod spacer; The five-sequence disc spring is arranged inside the five-sequence female die sleeve, with one end abutting against the five-sequence movable through die and the other end abutting against the five-sequence four-hole fixing seat for supporting the five-sequence movable through die; The five-sequence post-pushing tube is sleeved on the five-sequence post-stretching elliptical punching rod, and one end is arranged inside the five-sequence movable through die for pushing out the workpiece that has completed the through hole; The five-sequence pushing-out spacer is sleeved on the five-sequence post-stretching elliptical punching rod behind the five-sequence post-pushing tube; One end of the five-sequence pushing-out three-pin ejector rod penetrates through the five-sequence female die spacer, the five-sequence four-hole fixing seat and abuts against the five-sequence pushing-out spacer.

[0063] When the through hole is completed at the fifth station, the blank holding system of the molding machine sends the blank to the die orifice of the female die at the fifth station. When the main slider of the molding machine moves towards the female die at the fifth station, the blank is pushed into the five-sequence movable through die under the action of the male die at the fifth station. The main slider continues to move forward, and the five-sequence waste fine blanking compresses the five-sequence disc spring to complete the through penetration of the elliptical hole of the workpiece. The head shape of the workpiece is maintained jointly by the five-sequence waste fine blanking and the five-sequence movable through die. The formed part with the inner hole completed with the through hole is as shown in Attachment Figure 15 and Attachment Figure 16 shown.

[0064] As shown in Attachment Figure 17 As shown in the figure, the male die 6A at the sixth station includes a six-sequence trimming die sleeve 6A.1 and a six-sequence trimming male die 6A.2; The six-sequence trimming die sleeve is fixed on the molding machine; The six-sequence trimming male die is arranged inside the six-sequence trimming die sleeve for forming the flat position of the workpiece.

[0065] As shown in Attachment Figure 17As shown, the sixth station female mold 6B includes a six-sequence female mold sleeve 6B.1, a six-sequence trimming female mold 6B.2, a six-sequence round mold core 6B.3, a six-sequence female mold cushion sleeve 6B.4, a six-sequence female mold ejector pin 6B.5 and a six-sequence female mold ejector pin sleeve 6B.6, wherein: the six-sequence female mold sleeve is installed on the molding machine relative to the six-sequence trimming mold sleeve; the six-sequence trimming female mold is arranged in the six-sequence female mold sleeve for flat-position molding of the product; the six-sequence round mold core is arranged in the six-sequence trimming female mold for protecting the workpiece; the six-sequence female mold cushion sleeve is arranged in the six-sequence female mold sleeve for cushioning the six-sequence trimming female mold and the six-sequence round mold core; the six-sequence female mold ejector pin is arranged in the six-sequence female mold cushion sleeve for pushing out the flat-position trimming molding piece; the six-sequence female mold ejector pin sleeve is used to fix the six-sequence female mold ejector pin.

[0066] When the head of the sixth station is trimmed and flattened, the clamping system of the molding machine sends the blank to the die mouth of the sixth station female mold. When the main slide of the molding machine moves toward the sixth station female mold, the blank is pushed into the six-sequence round mold core by the sixth station male mold. The main slide continues to move forward to the front point, and the six-sequence trimming male mold and the six-sequence trimming female mold complete the trimming and molding of the flat position of the workpiece head. The molded part is shown in the attached figure. Figure 18 and attached Figure 19 As shown, the final upsetting of the workpiece is completed and no further machining is required.

[0067] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A cold heading forming die for a battery pack stud sleeve, characterized in that, Including: Six sets of male dies, including male dies for the first, second, third, fourth, fifth, and sixth workstations; Six sets of female dies, including female dies for the first, second, third, fourth, fifth, and sixth workstations respectively corresponding to the male dies of the above-mentioned first, second, third, fourth, fifth, and sixth workstations; The six sets of the above-mentioned male dies and female dies are respectively installed on a multi-station bolt forming machine. The blank is moved between the six sets of female dies and male dies through the blank clamping system of the forming machine, and the blank is successively subjected to pre-forming positioning holes, head pre-forming, head forming, inner hole post-stretching, completion of through holes, and head trimming and flattening.

2. The cold heading forming die for the battery pack stud sleeve according to claim 1, characterized in that The male die of the first workstation includes: A first-stage initial punching sleeve, installed on the forming machine; A first-stage male die ejector rod, with one end disposed inside the first-stage initial punching sleeve and the other end used to extrude the blank located inside the female die of the first workstation; A first-stage spacer block, disposed inside the first-stage initial punching sleeve and used to pad the first-stage male die ejector rod; A first-stage spacer sleeve, disposed at the tail of the first-stage initial punching sleeve and used to pad the first-stage spacer block; The female die of the first workstation includes: A first-stage straight-through die, installed on the forming machine opposite to the first-stage initial punching sleeve, and a first-stage straight-through die core is provided inside it for restricting the rod part of the blank; A first-stage female die ejector rod, disposed inside the first-stage straight-through die, and a punch for pre-forming the positioning hole of the blank is provided at its end, and it is also used to eject the pre-formed positioning hole part; A first-stage female die ejector rod sleeve, used to fix the first-stage female die ejector rod.

3. The cold heading forming die for the battery pack stud sleeve according to claim 1, characterized in that, The male die of the second workstation includes: A second-stage fine blanking die, installed on the forming machine, and a second-stage fine blanking core is provided at its end, and a cavity for pre-forming the end face of the workpiece head is provided on the end face of the second-stage fine blanking core; A second-stage male die ejector rod, movably installed inside the second-stage fine blanking core through the second-stage fine blanking sleeve, and can be used to eject the workpiece; A second-stage spacer block, disposed inside the second-stage fine blanking sleeve and used to pad the second-stage male die ejector rod; A second-stage spacer sleeve, disposed at the tail of the second-stage fine blanking sleeve and used to pad the second-stage spacer block; The female die of the second workstation includes: A second-stage female die sleeve, installed on the forming machine opposite to the second-stage fine blanking sleeve; A second-stage angle-reducing die, installed inside the second-stage female die sleeve, and an angle-reducing die core is provided inside it. A cavity for pre-forming the head of the workpiece is provided inside the angle-reducing die core, and it jointly completes the head pre-forming of the workpiece with the second-stage fine blanking; A second-stage female die ejector rod, disposed inside the second-stage angle-reducing die, and a punch for maintaining the shape of the workpiece positioning hole is provided at its end, and it is also used to eject the head pre-formed part; A second-stage female die ejector rod sleeve, used to fix the second-stage female die ejector rod.

4. The cold heading forming die for the battery pack stud sleeve according to claim 1, wherein The male die of the third workstation includes: A third-stage fine blanking sleeve, installed on the forming machine; A third-stage fine blanking ejector rod, with one end disposed inside the third-stage fine blanking sleeve and a punch for forming the counterbore of the workpiece head provided at the other end; A third-stage spacer block, disposed inside the third-stage fine blanking sleeve and used to pad the third-stage fine blanking ejector rod; A third-stage spacer sleeve, disposed at the tail of the third-stage fine blanking sleeve and used to pad the third-stage spacer block; The female die of the third workstation includes: A third-stage straight-through die, installed on the forming machine opposite to the third-stage fine blanking sleeve, and a straight-through die core is provided at its end. A cavity for forming the head of the workpiece is provided inside the straight-through die core; A third-stage female die ejector rod, disposed inside the third-stage straight-through die, and a punch for maintaining the shape of the workpiece positioning hole is provided at its end, and it is also used to eject the head formed part; A third-stage female die ejector rod sleeve, used to fix the third-stage female die ejector rod.

5. The cold heading forming die for the battery pack stud sleeve according to claim 1, wherein The male die of the fourth workstation includes: A fourth-stage fine blanking sleeve, installed on the forming machine; The four-sequence elliptical punch is fixedly installed in the four-sequence fine punching sleeve and is used to punch the countersunk hole on the head of the workpiece into an elliptical hole; The four-sequence four-hole pad is arranged in the fine-punching sleeve and fixes the four-sequence elliptical punching rod; The four-sequence three-hole pad is arranged in the fine-punching sleeve and is used to cushion the four-sequence pad and the four-sequence elliptical punching rod; The four-sequence cushion sleeve is arranged in the fine-blanking sleeve and is used to cushion the four-sequence three-hole cushion block; The rear pad of the four-sequence punching die is arranged at the tail of the four-sequence fine-punching sleeve and is used to cushion the four-sequence pad sleeve; The four-sequence push tube is mounted on the four-sequence elliptical punch rod, one end of which is movably arranged in the four-sequence fine punching sleeve to press the workpiece head shape and push the workpiece out; The four-sequence push-out three-pin, one end of which is inserted into the holes of the four-hole cushion block and the three-hole cushion block and abuts against the four-sequence push-out tube; The four-sequence push-out pad is arranged in the four-sequence fine-blanking sleeve and supports the other end of the four-sequence push-out three needles; The fourth station female mold comprises: The four-sequence female die sleeve is installed on the forming machine relative to the four-sequence fine blanking sleeve; A four-sequence movable female mold is movably arranged in a four-sequence female mold sleeve, and a four-sequence female mold core is arranged therein for constraining the shape of the workpiece; The four-sequence post-stretching elliptical punch has one end disposed in the four-sequence movable female die and is used to complete the stretching of the elliptical hole of the workpiece; The four-hole fixing seat is fixedly installed at the tail of the four-sequence female mold sleeve and is used to limit the four-sequence rear stretching elliptical punch; The four-sequence female die punch pad is arranged in the four-sequence four-hole fixing seat and is used to cushion the four-sequence rear stretch elliptical punch; The four-sequence female die pad is arranged behind the four-sequence four-hole fixing seat and is used to pad the four-sequence female die punch pad; The four-sequence butterfly spring is arranged in the four-sequence female mold sleeve, one end of which abuts against the four-sequence movable female mold, and the other end abuts against the four-sequence four-hole fixing seat, and is used to support the four-sequence movable female mold; The four-sequence rear push tube is mounted on the four-sequence rear stretching elliptical punch, and one end is arranged in the four-sequence movable female die, and is used to push out the inner hole rear stretching workpiece; The four-sequence push-out pad is mounted on the four-sequence rear stretching elliptical punch rod and is located behind the four-sequence rear push-out tube; A four-sequence push-out three-needle push rod has one end that penetrates through a four-sequence female mold cushion block, a four-sequence four-hole fixing seat and abuts against the four-sequence push-out cushion block.

6. The cold heading forming die for the battery pack stud sleeve according to claim 1, wherein The fifth station male mold comprises: Five-sequence fine blanking sleeve, installed on the forming machine; Five-sequence waste fine blanking, one end of which is fixed in the five-sequence fine blanking sleeve, used to protect the head of the workpiece, and a through hole for discharging waste is provided therein, and a bayonet for clamping waste is provided in the through hole; The five-sequence hollow pad is arranged in the five-sequence fine-blanking sleeve and is used to cushion the five-sequence waste fine-blanking; The five-sequence male mold pad is arranged at the tail of the five-sequence fine blanking sleeve, and is used to cushion the five-sequence hollow pad. The five-sequence male mold pad is provided with a waste groove for discharging waste; The fifth station female mold comprises: The five-sequence female die sleeve is installed on the forming machine relative to the five-sequence fine blanking sleeve; The five-sequence movable straight-through die is movably arranged in the five-sequence female die sleeve, and a five-sequence female die core is arranged therein for constraining the shape of the workpiece; The five-sequence post-stretching elliptical punch has one end disposed in the five-sequence movable straight-through die and is used to complete the elliptical through hole of the workpiece; The five-sequence four-hole fixing seat is fixedly installed at the tail of the five-sequence female die sleeve and is used to limit the five-sequence rear stretching elliptical punch; The five-sequence female die punch pad is arranged in the five-sequence four-hole fixing seat and is used to cushion the five-sequence rear stretch elliptical punch; The five-sequence female die pad is arranged behind the five-sequence four-hole fixing seat and is used to pad the five-sequence female die punch pad; The five - sequence conical spring is arranged inside the five - sequence female die sleeve. One end abuts against the five - sequence movable straight - through die, and the other end abuts against the five - sequence four - hole fixed seat, and is used to support the five - sequence movable straight - through die; The five - sequence rear push tube is sleeved on the five - sequence rear - stretched elliptical punching rod, and one end is arranged inside the five - sequence movable straight - through die, and is used to push out the workpiece with a through - hole completed; The five - sequence push - out cushion block is sleeved on the five - sequence rear - stretched elliptical punching rod behind the five - sequence rear push tube; One end of the five - sequence push - out three - needle ejector rod penetrates through the five - sequence female die cushion block and the five - sequence four - hole fixed seat and abuts against the five - sequence push - out cushion block.

7. The cold heading forming die for the battery pack stud sleeve according to claim 1, characterized in that, The male die of the sixth working station includes: The six - sequence trimming die sleeve is fixed on the molding machine; The six - sequence trimming male die is arranged inside the six - sequence trimming die sleeve and is used for forming the flat position of the workpiece; The female die of the sixth working station includes: The six - sequence female die sleeve is installed on the molding machine opposite to the six - sequence trimming die sleeve; The six - sequence trimming female die is arranged inside the six - sequence female die sleeve and is used for forming the flat position of the product; The six - sequence round die core is arranged inside the six - sequence trimming female die and is used to protect the workpiece; The six - sequence female die cushion sleeve is arranged inside the six - sequence female die sleeve and is used to pad the six - sequence trimming female die and the six - sequence round die core; The six - sequence female die ejector rod is arranged inside the six - sequence female die cushion sleeve and is used to push out the head - flat - position trimming formed part; The six - sequence female die ejector rod sleeve is used to fix the six - sequence female die ejector rod.

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