Wheel body closed type forging blank punching die structure

Abstract

The utility model provides a wheel body closed type forging blank punching die structure. The wheel body closed type forging blank punching die structure comprises an upper die assembly and a lower die assembly which are matched in a guiding mode. The upper die assembly comprises an upper die body, an upper die fixing base, an upper die pressing ring and an upper die frame, and the upper die fixing base is pressed on the upper die pressing ring in an inclined mode. The lower die assembly comprises a lower die body, a lower die ground mat, a lower die water jacket, a lower die pressing ring and a lower die frame, the lower die body and the upper die body are oppositely arranged up and down, and the periphery of the lower die body is in interference fit with the lower die water jacket. The upper die assembly and the lower die assembly are directly matched in a guiding mode, flash-free forging can be carried out, a blank face does not need to be machined, and the purposes of reducing cost and improving efficiency can be achieved. The accumulated error modulus error is much smaller, and the precision is higher; meanwhile, the lower die water jacket is added to the lower die assembly, continuous cooling of the die can be achieved, and the service life of the die is longer.

Description

Technical Field

[0001] The utility model relates to a wheel body forging die, in particular to a wheel body closed forging blank punching die structure. Background Art

[0002] Forging die refers to a tool that can form the blank into a die forging. Forging die is a key process equipment necessary for die forging production. It is a tool that needs to be used in every stroke of the equipment and plays a pivotal role in die forging production. Forging die is a die used in the forging process. The raw material undergoes plastic deformation in the forging die under the action of external force, thereby obtaining parts of the required shape and size. Forging die can be divided into hot forging die, warm forging die and cold forging die according to the different forging temperatures. Hot forging die can also be divided into hammer forging die, screw press forging die, mechanical press forging die, flat forging die and hydraulic press forging die due to different equipment. It is necessary to design and process the die frame during press die forging. In the forging process, blank making die (such as roll forging, wedge cross rolling), trimming die, punching die, correction die, cold precision pressing die, etc. are also required. These dies and devices also belong to the category of forging die.

[0003] Existing forging dies generally use flash forging when used for wheel forging. The blank surface needs to be processed secondary to obtain a higher surface finish. The production cost is high and the mold misalignment is large, which cannot meet the current market development needs of reducing costs and increasing efficiency. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in view of the defects of the prior art, a wheel body closed forging blank punching die structure is provided which can realize flash-free forging and non-processing of the blank surface.

[0005] The utility model adopts the following technical solutions to solve the above technical problems:

[0006] A wheel body closed forging blank punching die structure, including a guiding upper die assembly and a lower die assembly, wherein: the upper die assembly includes an upper die body, an upper die fixing seat, an upper die pressing ring and an upper die frame, and the upper die fixing seat is pressed on the upper die pressing ring with an inclination; the lower die assembly includes a lower die body, a lower die ground pad, a lower die water jacket, a lower die pressing ring and a lower die frame, and the lower die body and the upper die body are arranged relative to each other in the upper and lower directions, and its peripheral body is interference fit with the lower die water jacket.

[0007] Preferably, the upper die body, the upper die fixing seat and the upper die pressing ring are arranged coaxially, and the circumference of the upper die body is fixedly connected to the upper die fixing seat by a plurality of first upper die bolts.

[0008] Preferably, the first inclined surface of the outer peripheral body of the upper mold fixing seat and the second inclined surface of the inner hole of the upper mold pressing ring are interference connected by an inclined pressing method.

[0009] Preferably, the outer periphery of the upper mold pressing ring is fixedly connected to the upper mold frame by a plurality of second upper mold bolts, so as to press and fix the upper mold fixing seat on the top of the upper mold frame.

[0010] Preferably, the lower mold body, the lower mold ground pad, the lower mold water jacket and the lower mold pressing ring are coaxially arranged, and the lower mold ground pad is pressed into the stepped groove at the bottom end of the inner peripheral wall of the lower mold body.

[0011] Preferably, the third inclined surface of the outer peripheral body of the lower mold body and the fourth inclined surface of the inner peripheral wall of the lower mold water jacket are interference connected by an inclined pressing method.

[0012] Preferably, a circulating water groove which fits the outer peripheral wall of the lower mold body is provided on the inner peripheral wall of the lower mold water jacket, and a liquid inlet and a liquid outlet which communicate with both ends of the circulating water groove are provided thereon.

[0013] Preferably, the fifth inclined surface of the outer peripheral body of the lower mold water jacket and the sixth inclined surface of the inner hole of the lower mold pressing ring are interference connected by an inclined pressing method.

[0014] Preferably, the outer periphery of the lower mold water jacket is fixedly connected to the lower mold frame by a plurality of third bolts, so as to press and fix the lower mold body and the lower mold floor pad to the top of the lower mold frame.

[0015] More preferably, the bottom of the lower mold water jacket is separated from the top of the lower mold frame and is clearance-fitted.

[0016] Preferably, the upper mold body and the lower mold body can be lowered 2-4 times.

[0017] The utility model adopts the above technical solution, and compared with the prior art, has the following technical effects:

[0018] The utility model provides a wheel body closed forging blank punching die structure, in which the upper die assembly and the lower die assembly adopt direct guiding cooperation, and flash-free forging can be performed, and the blank surface does not need to be processed, thereby achieving the purpose of reducing costs and increasing efficiency; and the blank forged by adopting the die structure has a much smaller cumulative error modulus and higher precision than that by adopting the traditional guide column or die sleeve guiding method; in addition, adding a lower die water jacket to the lower die assembly can achieve continuous cooling of the die, and the die life is longer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall cross-sectional structure of a wheel body closed forging blank punching die structure of the utility model;

[0020] Figure 2 It is a partial enlarged structural schematic diagram of part A in a wheel body closed forging blank punching die structure of the utility model;

[0021] Figure 3 It is a partial enlarged structural schematic diagram of part B in a wheel body closed forging blank punching die structure of the utility model;

[0022] Figure 4 It is a three-dimensional structural schematic diagram of an upper die assembly in a wheel body closed forging blank punching die structure of the utility model;

[0023] Figure 5 It is a three-dimensional structural schematic diagram of a lower die assembly in a wheel body closed forging blank punching die structure of the utility model;

[0024] Figure 6 It is a schematic diagram of the lowering scheme of the upper die in a wheel body closed forging blank punching die structure of the utility model;

[0025] Figure 7 It is a schematic diagram of a lowering scheme of a lower die in a wheel body closed forging blank punching die structure of the utility model. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0028] In some embodiments, Figure 1 , Figure 4 and Figure 5 As shown, a closed forging blank punching die structure for a wheel body is provided, and the die structure mainly includes an upper die assembly 10 and a lower die assembly 20 which are guided and matched with each other. The upper die assembly 10 and the lower die assembly 20 directly adopt a guided matching method, and the forged blank 30 has a small modulus error, which is much smaller than the modulus error caused by the cumulative error when a guide column or a die sleeve is used for guidance.

[0029] Specifically, Figure 1 and Figure 4 As shown, the upper mold assembly 10 is mainly composed of an upper mold body 11, an upper mold fixing seat 12, an upper mold pressing ring 13 and an upper mold frame 14. The upper mold body 11 is fixedly mounted on the upper mold fixing seat 12. The upper mold fixing seat 12 is limitedly mounted on the inner hole of the upper mold pressing ring 13 by an inclined pressing method. The upper mold pressing ring 13 is fixedly mounted on the upper mold frame 14.

[0030] like Figure 1 and Figure 5 As shown, the lower mold assembly 20 is mainly composed of a lower mold body 21, a lower mold pad 22, a lower mold water jacket 23, a lower mold pressing ring 24 and a lower mold frame 25. The lower mold body 21 and the upper mold body 11 are arranged in a vertically opposite manner, and its peripheral body is interference-fitted with the lower mold water jacket 23. The lower mold water jacket 23 is fixedly mounted on the lower mold frame 25 through the lower mold pressing ring 24.

[0031] When the wheel body closed forging blank punching die structure is used for forging, the upper die assembly 10 and the lower die assembly 20 are controlled to guide and move, so that the upper die body 11 and the slider move together, and the upper die body 11 and the lower die body 21 are close together, so that the blank 30 can be formed.

[0032] In some of the embodiments, Figure 1 and Figure 4 As shown, the upper mold body 11, the upper mold fixing seat 12 and the upper mold pressure ring 13 are arranged coaxially, and the circumference of the upper mold body 11 is fixedly connected to the upper mold fixing seat 12 by a plurality of first upper mold bolts, and the plurality of first upper mold bolts are arranged at equal distances to stably mount the upper mold body 11 on the upper mold fixing seat 12.

[0033] like Figure 1 and Figure 2 As shown, in order to facilitate the disassembly, assembly and maintenance of the upper die fixing seat 12 and the upper die pressing ring 13, the side wall of the outer circumference of the upper die fixing seat 12 is provided with a first inclined surface 121, and the inner circumference of the inner hole of the upper die pressing ring 13 is provided with a second inclined surface 131. The first inclined surface 121 and the second inclined surface 131 have the same inclination, and can achieve inclined surface fitting connection. The upper die fixing seat 12 can achieve an inclined pressing connection with the upper die pressing ring 13 through the first inclined surface 121 and the second inclined surface 131 that cooperate with each other, and the connection method is interference fit, so that the upper die fixing seat 12 is pressed and fixed through the upper die pressing ring 13.

[0034] In addition, if Figure 1 and Figure 4 As shown, in order to realize the installation and disassembly of the upper mold pressing ring 13 and the upper mold frame 14, the outer periphery of the upper mold pressing ring 13 is fixedly connected to the upper mold frame 14 by a plurality of second upper mold bolts, and the plurality of second upper mold bolts are arranged at equal intervals, so as to stably press and fix the upper mold fixing seat 12 at the top position of the upper mold frame 14.

[0035] In some of the embodiments, Figure 1 and Figure 5As shown, the lower mold body 21, the lower mold ground pad 22, the lower mold water jacket 23 and the lower mold pressing ring 24 are arranged coaxially, and the lower mold ground pad 22 is pressed into the stepped groove 211 at the bottom end of the inner circumferential wall of the lower mold body 21, and a boss is provided on the outer periphery of the lower end of the lower mold ground pad 22, and the boss is limited and pressed into the stepped groove 211.

[0036] like Figure 1 and Figure 3 As shown, the side wall of the outer circumference of the lower die body 21 is set as the third inclined surface 212, and the inner circumference of the lower die water jacket 23 is set as the fourth inclined surface 231. The third inclined surface 212 of the outer circumference of the lower die body 21 and the fourth inclined surface 231 of the inner circumference of the lower die water jacket 23 are interference connected by an inclined pressing method, so that the lower die body 21 is limited and fixed by the lower die water jacket 23, so as to avoid the lower die body 21 from deflecting during the forging process, thereby ensuring the stability of the lower die body 21.

[0037] like Figure 1 and Figure 3 As shown, in order to improve the service life of the mold, a lower mold water jacket 23 is added to the lower mold assembly 20. A circulating water tank 232 is provided on the inner peripheral wall of the lower mold water jacket 23, which is fitted with the outer peripheral wall of the lower mold body 21, and a liquid inlet 233 and a liquid outlet 234 are provided on the lower mold water jacket 23, which are connected to both ends of the circulating water tank 232. The circulating cooling water enters the circulating water tank 232 through the liquid inlet 233 and is discharged from the liquid outlet 234. The cooling water circulating in the circulating water tank 232 can achieve continuous cooling of the inner lower mold body 21. On the one hand, it can ensure the reduction of fatigue wear on the mold cavity surface. On the other hand, it can avoid the situation that the mold cavity is directly cooled by water and cracked due to rapid cooling, and control the temperature change of the lower mold body 21 to be small, thereby ensuring that the surface quality of the blank is more stable.

[0038] In order to achieve the limit fixation of the lower mold water jacket 23, the side wall of the outer circumference of the lower mold water jacket 23 is set as the fifth inclined surface 235, and the inner hole wall of the lower mold pressing ring 24 is set as the sixth inclined surface 241. The fifth inclined surface 235 and the sixth inclined surface 241 have the same inclination and can be connected to each other. During assembly, the fifth inclined surface 235 of the outer circumference of the lower mold water jacket 23 and the sixth inclined surface 241 of the inner hole of the lower mold pressing ring 24 are interference connected by an inclined pressing method, thereby achieving the fixation of the lower mold water jacket 23.

[0039] like Figure 1 and Figure 5 As shown, the outer periphery of the lower mold water jacket 23 is fixedly connected to the lower mold frame 25 by a plurality of third bolts, and the plurality of third bolts are arranged at equal intervals to stably press and fix the lower mold body 21 and the lower mold ground pad 22 at the top position of the lower mold frame 25.

[0040] In addition, in order to realize the rapid disassembly and assembly of the lower mold water jacket 23, the lower mold body 21 is pressed by the lower mold water jacket 23, and the lower mold body 21 is pressed against the top of the lower mold frame 25. The bottom of the lower mold water jacket 23 can be separated from the top of the lower mold frame 25, and a clearance fit is adopted between the two, which ensures that the lower mold body 21 is fully pressed and facilitates the disassembly and maintenance of the lower mold water jacket 23.

[0041] It is worth noting that if Figure 6 and Figure 7 As shown, after the upper mold body 11 and the lower mold body 21 in the mold structure have been used for a period of time, if the appearance and dimensional quality of the blank cannot be guaranteed due to wear and deformation, the upper mold body 11 and the lower mold body 21 can be repaired and the mold can be reused 2-4 times, which can increase the mold life by 2-4 times.

[0042] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0043] Secondly, the drawings of the embodiments disclosed in the present utility model only involve structures related to the embodiments disclosed in the present utility model, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0044] Finally, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wheel body closed forging blank punching die structure, characterized in that: It comprises an upper die assembly and a lower die assembly with guiding fit, wherein: the upper die assembly comprises an upper die body, an upper die fixing seat, an upper die pressing ring and an upper die frame, the upper die fixing seat is pressed on the upper die pressing ring with an inclination; the lower die assembly comprises a lower die body, a lower die ground pad, a lower die water jacket, a lower die pressing ring and a lower die frame, the lower die body and the upper die body are arranged relative to each other in the upper and lower directions, and its peripheral body is interference fit with the lower die water jacket.

2. The wheel body closed forging blank punching die structure according to claim 1 is characterized in that: The upper die body, the upper die fixing seat and the upper die pressing ring are arranged coaxially, and the circumference of the upper die body is fixedly connected to the upper die fixing seat by a plurality of first upper die bolts.

3. The wheel body closed forging blank punching die structure according to claim 1 is characterized in that: The first inclined surface of the outer peripheral body of the upper mold fixing seat and the second inclined surface of the inner hole of the upper mold pressing ring are interference connected by an inclined pressing method.

4. The wheel body closed forging blank punching die structure according to claim 1, characterized in that: The outer periphery of the upper mold pressing ring is fixedly connected to the upper mold frame by a plurality of second upper mold bolts so as to press and fix the upper mold fixing seat on the top of the upper mold frame.

5. The wheel body closed forging blank punching die structure according to claim 1, characterized in that: The lower mold body, the lower mold ground pad, the lower mold water jacket and the lower mold pressing ring are arranged coaxially, and the lower mold ground pad is pressed into the stepped groove at the bottom end of the inner peripheral wall of the lower mold body.

6. The wheel body closed forging blank punching die structure according to claim 1, characterized in that: The third inclined surface of the outer peripheral body of the lower mold body and the fourth inclined surface of the inner peripheral wall of the lower mold water jacket are interference connected by an inclined pressing method.

7. The wheel body closed forging blank punching die structure according to claim 1 is characterized in that: A circulating water groove which fits the outer peripheral wall of the lower mold body is provided on the inner peripheral wall of the lower mold water jacket, and a liquid inlet and a liquid outlet which are connected to the two ends of the circulating water groove are provided thereon.

8. The wheel body closed forging blank punching die structure according to claim 1, characterized in that: The fifth inclined surface of the outer peripheral body of the lower mold water jacket and the sixth inclined surface of the inner hole of the lower mold pressing ring are interference connected by an inclined pressing method.

9. The wheel body closed forging blank punching die structure according to claim 1, characterized in that: The outer periphery of the lower mold water jacket is fixedly connected to the lower mold frame by a plurality of third bolts, so as to press and fix the lower mold body and the lower mold floor pad on the top of the lower mold frame.

10. The wheel body closed forging blank punching die structure according to claim 9, characterized in that: The bottom of the lower mold water jacket is separated from the top of the lower mold frame and is clearance-matched.

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