Die for outer diameter fine-shrinkage cold-extrusion forming process
By designing an outer diameter precision shrinkage mold for cold extrusion molding, the problems of outer diameter deviation and complex process of finished products in the existing cold extrusion process are solved, and high-precision molding and production efficiency of processed materials are achieved.
Patent Information
- Application Number
- CN202420578505.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-25
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-03-25
AI Technical Summary
When the existing cold extrusion process processes sleeve products, the outer diameter of the finished product is easily oval, with deviations of 5 to 10 wires, resulting in unfavorable subsequent assembly and requiring additional plastic shaping processes, with many processes and difficult to fully guarantee the quality.
Design a mold for external diameter precision shrinkage and cold extrusion forming process, including a feed end and an extrusion part, a feed groove is arranged in the feed end, and an extrusion groove is arranged in the extrusion part, and an inner diameter of the extrusion groove is smaller than that of the feed The inner diameter of the groove and the contact surface are used to contact with the processed material. The mold acts on the processed material through external forces, causing it to undergo plastic deformation, and ensures precise molding of the material through structures such as clamping plates and connecting extrusions.
Through the design of this mold, the strength and hardness of the processed materials are significantly improved, the processing process is reduced, and the production efficiency is improved, ensuring the quality and accuracy of the finished product.
Smart Images
Figure CN222519564U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cold extrusion, in particular to a die for outer diameter precision shrinkage cold extrusion molding process. Background Art
[0002] Cold extrusion is mainly used to manufacture various parts, such as shafts, rods, tubes, gears, etc. It applies pressure to the material at room temperature. The size and direction of the pressure can be controlled by the shape and size of the die to achieve precise plastic deformation of the blank, thereby obtaining the desired shape and size.
[0003] The outer diameter cold extrusion process is mainly used to process sleeve products. In the current technology, due to the limitations of the conventional cold extrusion process, the outer diameter of the finished product will be elliptical, with a deviation of 5 to 10 wires, which will have an adverse effect on subsequent assembly and require an additional shaping process to address the resulting deviation. However, due to the large number of process steps, the quality cannot be fully guaranteed and needs to be improved. Summary of the invention
[0004] In view of this, the purpose of this application is to provide a mold for outer diameter precision shrinkage cold extrusion molding process to achieve the purpose of improving molding accuracy and processing efficiency. The specific scheme is as follows:
[0005] A die for outer diameter precision shrinkage cold extrusion molding process comprises a feed end and an extrusion part, wherein the feed end is provided with a feed groove, and the extrusion part is provided with an extrusion groove, wherein the inner diameter of the extrusion groove is smaller than the inner diameter of the feed groove, and the contact surface of the extrusion groove is used for contacting with the processing material.
[0006] Preferably, the feed end is provided with a rounded corner located at the notch of the feed trough, and is provided with an inner chamfer located at the end where the feed trough is connected to the extrusion trough.
[0007] Preferably: one end of the extrusion portion away from the feeding end is abutted against a clamping plate, the inner diameter of the clamping plate is larger than the inner diameter of the extrusion groove, and the inner diameter difference is 0-1 wire.
[0008] Preferably: the outer side of the extrusion part is connected with a connecting extrusion body, one end of the connecting extrusion body close to the feeding end is provided with a connecting inclined wall connected to the outer side of the extrusion part as a whole, and the other end is used for abutting and fixing with the outer side of the clamping plate.
[0009] Preferably: a connecting ring groove and a fixing ring are provided on the outer side of one end of the connecting extrusion body away from the feeding end; the fixing ring includes an integrally formed fixing portion and an outer ring portion, one end of the clamping plate is inserted into the connecting extrusion body, and the other end passes through the connecting extrusion body, the fixing portion is detachably plugged and fixed in the connecting ring groove, and the outer ring portion is detachably sleeved and fixed at the corresponding end of the clamping plate.
[0010] Preferably, the clamping plate is composed of a plurality of clamping petals which are distributed with equal arc angles and abut against each other.
[0011] It can be seen from the above scheme that the present application provides a mold for an outer diameter precision shrinkage cold extrusion molding process, and the mold for an outer diameter precision shrinkage cold extrusion molding process has the following beneficial effects: by acting on the processing material through external force to cause the processing material to produce plastic deformation, so as to redistribute and transfer the volume of the processing material in the mold for the outer diameter precision shrinkage cold extrusion molding process, thereby ensuring the quality and precision of the processing material, wherein the processing material is tightly fitted with the internal contact surface of the mold for the outer diameter precision shrinkage cold extrusion molding process, and then the extrusion equipment applies pressure to the mold for the outer diameter precision shrinkage cold extrusion molding process to complete the plastic deformation of the processing material, so that the strength and hardness of the obtained processing material can be significantly improved through the mold for the outer diameter precision shrinkage cold extrusion molding process, and the processing steps are reduced and the production efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural schematic diagram of this embodiment;
[0013] Figure 2 It is a schematic diagram of the structure of the processed material in this embodiment.
[0014] Explanation of the reference numerals: 1. Feed end; 11. Feed trough; 12. Chamfered corner; 13. Inner chamfer; 2. Extrusion portion; 21. Extrusion groove; 22. Connecting extrusion body; 221. Connecting annular groove; 222. Connecting inclined wall; 3. Clamping plate; 31. Feeding cavity; 4. Fixed sleeve; 41. Fixed portion; 42. Outer ring portion; 5. Processing material; 51. Cylinder groove; 52. Cylinder wall. DETAILED DESCRIPTION
[0015] In order to make the technical solution and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0016] It should be mentioned that the processing material 5 of this application is as follows Figure 2As shown, the barrel groove 51 and barrel wall 52 are located at one end, and the end of the processing material 5 having the barrel groove 51 and barrel wall 52 is inserted into the extrusion part 2 through the feed end 1, and the processing material 5 is completely placed in the extrusion part 2 before the extrusion operation is performed. Of course, the processing material 5 can also be a shaft, a rod, a tube, etc. suitable for cold extrusion, which will not be described in detail here.
[0017] like Figure 1 As shown, a die for outer diameter precision shrinkage cold extrusion molding process comprises a feed end portion 1 and an extrusion portion 2. A feed trough 11 is provided in the feed end portion 1, so that the processed material 5 can effectively pass through the feed trough 11 and enter the extrusion portion 2. An extrusion groove 21 is provided in the extrusion portion 2, and the inner diameter of the extrusion groove 21 is smaller than the inner diameter of the feed trough 11, and the contact surface of the extrusion groove 21 is used to contact the processed material 5. Therefore, by placing the processed material 5 in the extrusion portion 2 so as to contact the contact surface in the extrusion portion 2, and then applying pressure to the die for outer diameter precision shrinkage cold extrusion molding process, the purpose of causing the processed material 5 to produce plastic deformation can be achieved.
[0018] It should be noted that a chamfer 12 is provided at the notch of the feed trough 11 at the feed end 1, and an inner chamfer 13 is provided at the end where the feed trough 11 and the extrusion trough 21 are connected, thereby further reducing the difficulty of assembling the processed material 5 into the extrusion trough 21.
[0019] In order to prevent the processed material 5 from being deformed during the unloading process and thus affecting the quality and precision of the processed material 5, a clamping plate 3 is abutted against the end of the extrusion part 2 away from the feeding end 1. A material discharge cavity 31 is arranged in the clamping plate 3, and the inner diameter of the material discharge cavity 31 is larger than the inner diameter of the extrusion groove 21, and the inner diameter difference is 0-1 mm, so as to reduce the difficulty of moving the processed material 5 into the material discharge cavity 31 while effectively unloading.
[0020] Among them, a connecting extrusion body 22 is connected to the outer side of the extrusion part 2. One end of the connecting extrusion body 22 close to the feed end 1 is provided with a connecting inclined wall 222 connected to the outer side of the extrusion part 2 as a whole, and the other end is used to abut and fix with the outer side of the clamping plate 3. In order to achieve the purpose of effectively connecting the clamping plate 3, a connecting ring groove 221 and a fixing ring 4 are provided on the outer side of the end of the connecting extrusion body 22 away from the feed end 1. The fixing ring 4 includes an integrally formed fixing portion 41 and an outer ring portion 42. One end of the clamping plate 3 is inserted into the connecting extrusion body 22, and the other end passes through the connecting extrusion body 22, and the fixing portion 41 is detachably plugged and fixed in the connecting ring groove 221, and the outer ring portion 42 is detachably sleeved and fixed on the corresponding end of the clamping plate 3. Therefore, in the process of completing the extrusion processing and removing the processed material 5, the processed material 5 is first moved into the discharge cavity 31. At this time, the discharge cavity 31 and the processed material 5 are in contact with each other, and the outer ring portion 42 and the fixing portion 41 are opened, so that the outer ring portion 42 is detached from the clamping plate 3, and the fixing portion 41 is detached from the connecting extrusion body 22, which helps to pull the clamping plate 3 out of the connecting extrusion body 22, and then remove the processed material 5 from the clamping plate 3, which significantly reduces the construction difficulty and achieves the effect of improving the quality and precision of the processed material 5.
[0021] At the same time, the clamping plate 3 is composed of a plurality of clamping petals which are distributed with equal arcs and abut against each other, so as to further reduce the difficulty of removing the processed material 5.
[0022] In summary, the present application provides a mold for an outer diameter precision shrinkage cold extrusion molding process, which acts on a processing material 5 through an external force to cause the processing material 5 to produce plastic deformation, so as to redistribute and transfer the volume of the processing material 5 within the mold for outer diameter precision shrinkage cold extrusion molding process, thereby ensuring the quality and precision of the processing material 5, wherein the processing material 5 is tightly fitted with the internal contact surface of the mold for outer diameter precision shrinkage cold extrusion molding process, and then pressure is applied to the mold for outer diameter precision shrinkage cold extrusion molding process by an extrusion device to complete the plastic deformation of the processing material 5, so that the strength and hardness of the processing material 5 obtained by the mold for outer diameter precision shrinkage cold extrusion molding process can be significantly improved, and the processing steps can be reduced and the production efficiency can be improved.
[0023] The "first", "second", "third", "fourth", etc. (if any) referred to in this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods or devices.
[0024] It should be noted that the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0025] Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.
Claims
1. A mold for outer diameter precision shrinkage cold extrusion molding process, characterized in that: The invention comprises a feed end (1) and an extrusion part (2), wherein a feed groove (11) is arranged in the feed end (1), and an extrusion groove (21) is arranged in the extrusion part (2), the inner diameter of the extrusion groove (21) is smaller than the inner diameter of the feed groove (11), and the contact surface of the extrusion groove (21) is used to contact the processing material (5); the end of the extrusion part (2) away from the feed end (1) is abutted against a clamping plate (3), the inner diameter of the clamping plate (3) is larger than the inner diameter of the extrusion groove (21), and the inner diameter difference is 0-1 wire.
2. The mold for outer diameter precision shrinkage cold extrusion molding process according to claim 1, characterized in that: The feed end portion (1) is provided with a rounded corner (12) located at the notch of the feed trough (11), and is provided with an inner chamfer (13) located at the end where the feed trough (11) is connected to the extrusion trough (21).
3. The mold for outer diameter precision shrinkage cold extrusion molding process according to claim 1, characterized in that: The outer side of the extrusion portion (2) is connected to a connecting extrusion body (22), one end of the connecting extrusion body (22) close to the feed end (1) is provided with a connecting inclined wall (222) connected to the outer side of the extrusion portion (2) as a whole, and the other end is used for abutting and fixing with the outer side of the clamping plate (3).
4. The mold for outer diameter precision shrinkage cold extrusion molding process according to claim 3, characterized in that: A connecting ring groove (221) and a fixing ring (4) are arranged on the outer side of one end of the connecting extrusion body (22) away from the feeding end (1); the fixing ring (4) comprises a fixing portion (41) and an outer ring portion (42) which are integrally formed; one end of the clamping plate (3) is inserted into the connecting extrusion body (22), and the other end is passed through the connecting extrusion body (22); the fixing portion (41) is detachably plugged and fixed in the connecting ring groove (221), and the outer ring portion (42) is detachably sleeved and fixed on the corresponding end of the clamping plate (3).
5. The mold for outer diameter precision shrinkage cold extrusion molding process according to claim 4, characterized in that: The clamping plate (3) is composed of a plurality of clamping petals which are distributed at equal arc angles and abut against each other.