Cold forging jig
By setting up multiple grooves and cutting mechanisms in the cold forging fixture, the problem of difficult to form a straight part during the cold forging process is solved, and precision molding and pressure reduction with feet and straight part are achieved, which improves the cold forging Forming accuracy and efficiency.
Patent Information
- Application Number
- CN202420916707.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-29
AI Technical Summary
During the cold forging process, the straight part of the foot member is difficult to form due to the large raw material size and large surface area, resulting in greater impact pressure and higher strength upper and lower molds, and foot parts often appear. The problem of forming but the straight part has not yet been formed.
A cold forging fixture is designed. By setting a plurality of grooves between the lower die and the upper die, the cold forging raw material is allowed to flow to the third groove under pressure, reducing the contact surface between the upper die and the straight part, and reducing the pressure. and standard shapes are formed by cutting members.
Precision forming of feet and straight parts during cold forging is achieved, reducing the pressure required for updating the mold, and improving the molding accuracy and efficiency of the cold forging.
Smart Images
Figure CN222175806U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cold forging technology, in particular to a cold forging jig. Background Art
[0002] Cold forging is a forming process below the recrystallization temperature of the material, and is a forging process performed below the recovery temperature. In production, forging without heating the blank is usually called cold forging. Cold forging materials are mostly aluminum and some alloys, copper and some alloys, low carbon steel, medium carbon steel, and low alloy structural steel, which have low deformation resistance and good plasticity at room temperature. Cold forgings have good surface quality and high dimensional accuracy, and can replace some cutting processes.
[0003] In the prior art, when cold forging a component with a foot, the raw material at the foot of the component is smaller in size and easier to cold forge, while the raw material at the straight part is larger in size and has a larger surface area and is not easy to cold forge. When cold forging and stamping the component, the problem often occurs that the foot is formed but the straight part is not yet formed, so a greater impact pressure and higher strength upper and lower dies are required. Utility Model Content
[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a cold forging jig, which aims to solve the problem in the prior art that, when cold forging a component with a foot, the raw material size at the foot of the component is smaller, which is easier to cold forge, while the raw material size at the straight part is larger and the surface area is larger, which is not easy to cold forge. When the component is cold forged and stamped, the foot is often formed but the straight part is not yet formed, so a greater impact pressure and higher strength upper and lower dies are required.
[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:
[0006] A cold forging jig comprises a lower die having a shape of a forming component, an upper die for applying a punching force, and a cold forging part located between the lower die and the upper die, wherein the cold forging part comprises a foot portion and a straight portion, a first groove is provided on the upper surface of the lower die, a second groove is provided on the upper surface of the first groove, the first groove is arranged corresponding to the position of the straight portion and is used to cold forge the straight portion, the second groove is arranged corresponding to the position of the foot portion and is used to cold forge the foot portion, a cold forging raw material is provided above the straight portion, a third groove is also provided on the upper surface of the first groove, and the third groove is arranged corresponding to the position of the cold forging raw material.
[0007] According to one aspect of the above technical solution, a fourth groove is formed on the upper surface of the straight portion, and the cold forging raw material is placed in the fourth groove.
[0008] According to one aspect of the above technical solution, the cold forging jig further includes a cutting mechanism, and the cutting mechanism is used to cut the portion at the fourth groove of the cold forging part.
[0009] According to one aspect of the above technical solution, the upper mold includes a solid part, a molding block located below the solid part, and a molding groove formed in a depression on the lower surface of the solid part, and the molding block and the molding groove are used to mold the shape of the upper surface of the straight part.
[0010] According to one aspect of the above technical solution, a cross-sectional dimension of the third groove is greater than a cross-sectional dimension of the second groove.
[0011] According to one aspect of the above technical solution, the lower surface of the solid portion is recessed to form a fifth groove, and the fifth groove matches the size of the cold forging raw material.
[0012] Compared with the prior art, the beneficial effects of the utility model are:
[0013] By placing excess cold forging raw material on the upper surface of the straight portion of the cold forging piece that has not been processed, and opening a third groove on the upper surface of the first groove, when cold forging is performed, the upper die applies a punching force to the cold forging piece, and the leg portion is first formed in the second groove, and at this time, the straight portion is also partially formed in the first groove. As the upper die is pressed deeper, the leg portion will be cold forged more precisely, and the cold forging raw material and part of the straight portion will be squeezed and flow into the third groove, which helps to reduce the contact surface and the pressure required by the upper die, and the remaining area of the straight portion will be molded more precisely. Finally, the area of the cold forging piece molded into the third groove can be cut off by a cutting member to form a standard cold forging piece;
[0014] The utility model helps the cold forging piece to flow freely into the third groove during cold forging, reduces the contact surface between the upper die and the straight part, and reduces the absolute pressure required by the upper die. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the structure of the cold forging jig in the embodiment of the utility model;
[0016] Figure 2 for Figure 1 Schematic diagram of the structure of the cold forging in the first perspective;
[0017] Figure 3 for Figure 1 Schematic diagram of the structure of the cold forging under the second viewing angle;
[0018] Figure 4 for Figure 1 Schematic diagram of the structure of the middle and lower molds;
[0019] Figure 5 for Figure 1 Schematic diagram of the structure of the middle and upper mold;
[0020] Description of main component symbols:
[0021] Lower die 10 Upper mold 20 Cold forgings 30 Straight part 31 With feet 32 Fourth groove 33 Cold forging raw materials 34 First groove 11 Second groove 12 The third groove 13 Physical Department 21 Molding block 22 Forming groove 23 Fifth groove 24
[0022] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION
[0023] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.
[0024] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.
[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0026] See also Figures 1 to 5 , shown is a cold forging jig in the first embodiment of the utility model, characterized in that it includes a lower die 10 having a forming component shape, an upper die 20 for applying a punching force, and a cold forging part 30 located between the lower die 10 and the upper die 20, the cold forging part 30 includes a foot 32 and a straight part 31, a first groove 11 is provided on the upper surface of the lower die 10, a second groove 12 is provided on the upper surface of the first groove 11, the first groove 11 is arranged corresponding to the position of the straight part 31, and is used to cold forge the straight part 31, the second groove 12 is arranged corresponding to the position of the foot 32, and is used to cold forge the foot 32, a cold forging raw material 34 is arranged above the straight part 31, and a third groove 13 is also provided on the upper surface of the first groove 11, and the third groove 13 is arranged corresponding to the position of the cold forging raw material 34.
[0027] It can be understood that the utility model places excess cold forging raw material 34 on the upper surface of the straight portion 31 of the unprocessed cold forging part 30, and opens the third groove 13 on the upper surface of the first groove 11. When cold forging is performed, the upper die 20 applies a punching force to the cold forging part 30, and the leg portion 32 is first formed in the second groove 12. At this time, the straight portion 31 is also partially formed in the first groove 11. As the upper die 20 is pressed deeper, the leg portion 32 is cold forged more precisely, and the cold forging raw material 34 and a part of the straight portion 31 are squeezed and flow into the third groove 13, which helps to reduce the contact surface and reduce the pressure required by the upper die 20, and the remaining area of the straight portion 31 is molded more precisely. Finally, the area of the cold forging part 30 molded into the third groove 13 can be cut off by a cutting member to form a standard cold forging part 30.
[0028] The utility model helps the cold forging piece 30 to flow freely into the third groove 13 during cold forging, reduces the contact surface between the upper die 20 and the straight portion 31, and reduces the absolute pressure required by the upper die 20.
[0029] Specifically, a fourth groove 33 is formed on the upper surface of the straight portion 31 , and the cold forging raw material 34 is placed in the fourth groove 33 ; the cold forging jig also includes a cutting mechanism, and the cutting mechanism is used to cut the portion of the cold forging part 30 at the fourth groove 33 .
[0030] It can be understood that the fourth groove 33 is pre-processed on the unprocessed cold forging part 30, and is used to place the cold forging raw material 34 to prevent the cold forging raw material 34 from shifting due to the extrusion of the upper die 20 during cold forging. In this embodiment, the fourth groove 33 and the third groove 13 are correspondingly arranged in the vertical direction. When the cutting mechanism cuts the cold forging part 30 after cold forging, the fourth groove 33 can be used as a boundary line for cutting.
[0031] Furthermore, the upper mold 20 includes a solid portion 21, a molding block 22 located below the solid portion 21, and a molding groove 23 formed in a depression on the lower surface of the solid portion 21, and the molding block 22 and the molding groove 23 are used to mold the shape of the upper surface of the straight portion 31.
[0032] It is understandable that for some precision components, it is necessary to form multiple bumps or grooves on their surfaces to meet different functions. By forming multiple first forming blocks 22 and first forming grooves 23 under the solid part 21, during cold forging, the upper surface of the straight part 31 will form different shapes according to the shapes of the first forming blocks 22 and the first forming grooves 23.
[0033] Furthermore, a cross-sectional dimension of the third groove 13 is greater than a cross-sectional dimension of the second groove 12 .
[0034] It can be understood that during cold forging, the cross-sectional size of the second groove 12 for forging the foot 32 needs to be smaller than the cross-sectional size of the third groove 13 for accommodating the cold forging raw material 34, so that during cold forging, the foot 32 will be formed first and the cold forging raw material 34 will be molded later. Otherwise, the cold forging raw material 34 will be molded first before the foot 32 is formed, so that during molding, the upper die 20 will be stuck in the cold forging raw material 34 and cannot be pressed down, resulting in the inability to form the foot 32. The cold forging raw material 34 should not be subjected to too much force.
[0035] Furthermore, the lower surface of the solid portion 21 is recessed to form a fifth groove 24 , and the size of the fifth groove 24 matches that of the cold forging raw material 34 .
[0036] It can be understood that this design structure can make the accommodating space of the cold forging material 34 larger, which is equivalent to the space of the fifth groove 24 plus the third groove 13, so that during cold forging, the pressure of the upper die 20 on the cold forging material 34 is smaller.
[0037] In summary, the cold forging jig in the above embodiment of the utility model places excess cold forging raw material on the upper surface of the straight portion of the cold forging piece that has not been processed, and opens the third groove on the upper surface of the first groove. When cold forging is performed, the upper die applies a punching force to the cold forging piece, and the leg portion is first formed in the second groove. At this time, the straight portion is also partially formed in the first groove. As the upper die is pressed deeper, the leg portion is cold forged more precisely, and the cold forging raw material and part of the straight portion are squeezed and flow into the third groove, which helps to reduce the contact surface and the pressure required by the upper die, and the remaining area of the straight portion is molded more precisely. Finally, the area of the cold forging piece molded into the third groove can be cut off by a cutting member to form a standard cold forging piece.
[0038] The utility model helps the cold forging piece to flow freely into the third groove during cold forging, reduces the contact surface between the upper die and the straight part, and reduces the absolute pressure required by the upper die.
[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0040] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A cold forging jig, characterized in that: It includes a lower die having a shape of a forming component, an upper die for applying a punching force, and a cold forging part located between the lower die and the upper die, the cold forging part including a foot portion and a straight portion, the upper surface of the lower die is provided with a first groove, the upper surface of the first groove is provided with a second groove, the first groove is arranged corresponding to the position of the straight portion and is used to cold forge the straight portion, the second groove is arranged corresponding to the position of the foot portion and is used to cold forge the foot portion, a cold forging raw material is arranged above the straight portion, a third groove is also arranged on the upper surface of the first groove, and the third groove is arranged corresponding to the position of the cold forging raw material.
2. The cold forging jig according to claim 1, characterized in that: A fourth groove is formed on the upper surface of the straight portion, and the cold forging raw material is placed in the fourth groove.
3. The cold forging jig according to claim 2, characterized in that: The cold forging jig further includes a cutting mechanism, and the cutting mechanism is used to cut the portion at the fourth groove of the cold forging part.
4. The cold forging jig according to claim 1, characterized in that: The upper mold includes a solid part, a molding block located below the solid part, and a molding groove formed by depression on the lower surface of the solid part. The molding block and the molding groove are used to mold the shape of the upper surface of the straight part.
5. The cold forging jig according to claim 1, characterized in that: The cross-sectional dimension of the third groove is greater than the cross-sectional dimension of the second groove.
6. The cold forging jig according to claim 4, characterized in that: The lower surface of the solid part is recessed to form a fifth groove, and the fifth groove matches the size of the cold forging raw material.