Cold heading forming tool for thin-wall stainless steel lifting hook
Through the cold heading forming tooling of thin-wall stainless steel hooks, the method of two stamping deformation is adopted to solve the problems of low processing efficiency and high defect rate in the prior art, and efficient and stable workpiece forming is achieved.
Patent Information
- Application Number
- CN202510542149.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2025-07-04
AI Technical Summary
The existing stainless steel hook processing method requires middle extrusion deformation and front stamping deformation in two steps, resulting in low processing efficiency and thin-walled workpieces are easily damaged or cracked, resulting in high defect rate.
A cold heading forming tooling with thin-wall stainless steel hook is adopted. The rear part of the workpiece is fixed by the rear clamping die, the middle clamping die is clamped with the middle clamping die, and the front part of the workpiece is stamped and deformed in two times using the conical hole of the front top die. First, pre-stamped through the first forming hole, and then secondary stamped through the second forming hole. Combined with the extrusion of the middle clamping die and the rear clamping die, the conical head of the workpiece and the annular boss are achieved simultaneously forming.
Improve processing efficiency, reduce the probability of broken or cracking of the front part of the workpiece, and ensure processing quality.
Smart Images
Figure CN120243798A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of processing tooling for tubular workpieces, and more particularly to a cold heading forming tooling for thin-walled stainless steel hooks. Background Art
[0002] In the processing process of stainless steel hooks, generally, a tubular blank is first produced. After the front clamping table and the rear clamping table respectively clamp the front and rear parts of the blank, the front clamping table and the rear clamping table are moved closer to each other, so that an annular boss is extruded in the middle part of the blank. Subsequently, the front part of the blank is stamped by a stamping die, so that a conical head is processed on the front part of the blank. However, in the existing processing method, the blank needs to be subjected to extrusion deformation in the middle part and stamping deformation in the front part in two steps, resulting in low processing efficiency. Moreover, due to the thin wall of the blank, when the existing stamping die stamps the front part of the blank, it is easy to damage or crack, resulting in a high rejection rate. Summary of the Invention
[0003] The object of the present invention is to solve the problem that in the existing processing method of hooks, the blank needs to be subjected to extrusion deformation in the middle part and stamping deformation in the front part in two steps, resulting in low processing efficiency. Moreover, due to the thin wall of the blank, when the existing stamping die stamps the front part of the blank, it is easy to damage or crack, resulting in a high rejection rate.
[0004] To solve the above problems, the present invention provides a cold heading forming tooling for thin-walled stainless steel hooks, comprising: A rear clamping die fixed in the front-rear direction, including a left rear clamping table and a right rear clamping table that can be clamped relatively, and the left rear clamping table and the right rear clamping table are used for clamping the rear part of the workpiece; A middle clamping die that can move in the front-rear direction and is located on the front side of the rear clamping die, including a left middle clamping table and a right middle clamping table that can be clamped relatively, and the left middle clamping table and the right middle clamping table are used for clamping the middle part of the workpiece. Forming grooves distributed around the workpiece are provided on the rear sides of the left middle clamping table and the right middle clamping table; A front top die that moves in the front-rear direction and is located on the front side of the middle clamping die. The front top die includes a first end provided with a first forming hole and a second end provided with a second forming hole. Both the first forming hole and the second forming hole are tapered holes, and the taper of the first forming hole is greater than that of the second forming hole. Both the first forming hole and the second forming hole correspond to the front part of the workpiece. The front top die is used to abut the first end or the second end against the middle clamping die and push the middle clamping die to move towards the rear clamping die.
[0005] In the above solution, the rear clamping die is used to clamp and fix the rear part of the workpiece, and the middle clamping die is used to clamp the middle part of the workpiece; during processing, first, the first end of the front top die is oriented towards the middle clamping die, and the front part of the workpiece is abutted through the first forming hole. The front top die moves backward under the action of an external load and pushes the middle clamping die to move backward until it abuts against the rear clamping die. At this time, on the one hand, the front part of the workpiece is roughly stamped out a conical head under the action of the first forming hole, and on the other hand, the middle part of the workpiece is extruded out an annular boss at the position of the forming groove under the action of the middle clamping die and the rear clamping die; Subsequently, the front top die is rotated so that the second end faces the middle clamping die, and the front part of the workpiece is abutted through the second forming hole. The front top die moves backward again under the action of an external load, and the second forming hole further stamps and shapes the conical head of the front part of the workpiece. Compared with the prior art, the above solution drives the middle clamping die to move towards the rear clamping die by the front top die, thereby simultaneously realizing the stamping deformation of the conical head of the front part of the workpiece and the extrusion deformation of the annular boss in the middle part, improving the processing efficiency; and the front top die stamps and deforms the conical head of the front part of the workpiece twice through the first forming hole and the second forming hole. Since the taper of the first forming hole is greater than that of the second forming hole, the first forming hole can first perform pre-stamping with a relatively small deformation amplitude on the front part of the workpiece, and then the second forming hole performs secondary stamping deformation with a relatively large deformation amplitude on the front part of the workpiece. Stamping is carried out in two times, greatly reducing the probability of the front part of the workpiece being damaged or cracked, and ensuring the processing quality.
[0006] In an improved solution, the left rear clamping table and the right rear clamping table are both provided with positioning holes penetrating in the left-right direction. The positioning holes of the left rear clamping table and the right rear clamping table are arranged oppositely. The positioning holes of the left rear clamping table and the right rear clamping table are used for sliding cooperation with an external guide post, so as to realize the guiding function of the left rear clamping table and the right rear clamping table when clamping or separating in the left-right direction through the positioning holes.
[0007] In an improved solution, the opposite surfaces of the left rear clamping table and the right rear clamping table are provided with rear clamping grooves corresponding to the rear part of the workpiece, so that the left rear clamping table and the right rear clamping table realize the stable clamping effect on the rear part of the workpiece through the rear clamping grooves.
[0008] In an improved solution, the forming groove is opened in the right part of the rear side of the left middle clamping table and the left part of the rear side of the right middle clamping table in the up-down direction, so as to facilitate the processing of the forming grooves of the left middle clamping table and the right middle clamping table.
[0009] In an improved solution, the width of the forming groove in the front-rear direction corresponds to the thickness of the annular boss to be processed on the workpiece.
[0010] In an improved solution, the opposite surfaces of the left middle clamping table and the right middle clamping table are provided with middle clamping grooves corresponding to the middle part of the workpiece, so that the left middle clamping table and the right middle clamping table realize the stable clamping effect on the middle part of the workpiece through the middle clamping grooves. Brief Description of the Drawings
[0011] Figure 1 It is a schematic diagram of the finished product of the workpiece to be processed by a cold heading forming tooling for a thin-walled stainless steel hook; Figure 2 It is a schematic diagram of the overall cold heading forming tooling for a thin-walled stainless steel hook; Figure 3 It is a top view schematic diagram of a cold heading forming tooling for a thin-walled stainless steel hook; Figure 4 It is along Figure 3 The sectional view schematic diagram of the A-A sectional line in; Figure 5 It is a cross-sectional schematic diagram of the front top die of a cold heading forming tooling for a thin-walled stainless steel hook.
[0012] Description of the reference numerals, 1. Rear clamping die; 11. Left rear clamping platform; 12. Right rear clamping platform; 13. Positioning hole; 14. Rear clamping groove; 2. Middle clamping die; 21. Left middle clamping platform; 22. Right middle clamping platform; 23. Forming groove; 24. Middle clamping groove; 3. Front top die; 31. First forming hole; 32. Second forming hole; 4. Workpiece; 41. Tapered head; 42. Annular boss. Detailed Description of the Preferred Embodiment
[0013] Those skilled in the art should understand that the following embodiments are only used to explain the technical principle of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.
[0014] In the description of the following embodiments, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.
[0015] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0016] The present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0017] Please refer to Figures 2 - 5 , a cold heading forming tooling for a thin-walled stainless steel hook provided by an embodiment of the present invention, comprising: A rear clamping die 1 fixed in the front-rear direction, including a left rear clamping table 11 and a right rear clamping table 12 that can be relatively clamped, and the left rear clamping table 11 and the right rear clamping table 12 are used to clamp the rear part of the workpiece 4; A middle clamping die 2 that can move along the front-rear direction and is located on the front side of the rear clamping die 1, including a left middle clamping table 21 and a right middle clamping table 22 that can be relatively clamped, and the left middle clamping table 21 and the right middle clamping table 22 are used to clamp the middle part of the workpiece 4. A forming groove 23 distributed around the workpiece 4 is provided on the rear sides of the left middle clamping table 21 and the right middle clamping table 22; A front top die 3 that moves along the front-rear direction and is located on the front side of the middle clamping die 2. The front top die 3 includes a first end provided with a first forming hole 31 and a second end provided with a second forming hole 32. Both the first forming hole 31 and the second forming hole 32 are tapered holes and the taper of the first forming hole 31 is greater than that of the second forming hole 32. Both the first forming hole 31 and the second forming hole 32 correspond to the front part of the workpiece 4. The front top die 3 is used to abut the first end or the second end against the middle clamping die 2 and push the middle clamping die 2 to move towards the rear clamping die 1.
[0018] Combined with Figure 1 shown, in the above solution, the rear part of the workpiece 4 is clamped and fixed by the rear clamping die 1, and the middle part of the workpiece 4 is clamped by the middle clamping die 2; during processing, first, the first end of the front top die 3 faces the middle clamping die 2, and the front part of the workpiece 4 is abutted through the first forming hole 31. The front top die 3 moves backward under the action of an external load and pushes the middle clamping die 2 to move towards the rear clamping die 1 until they abut. At this time, on the one hand, the front part of the workpiece 4 is roughly punched out with a tapered head 41 under the action of the first forming hole 31, and on the other hand, the middle part of the workpiece 4 is extruded with an annular boss 42 at the position of the forming groove 23 under the action of the middle clamping die 2 and the rear clamping die 1; then the front top die 3 is rotated so that the second end faces the middle clamping die 2, and the front part of the workpiece 4 is abutted through the second forming hole 32. The front top die 3 moves backward again under the action of an external load, and the second forming hole 32 further punches and shapes the tapered head 41 of the front part of the workpiece 4.
[0019] Compared with the prior art, in the above solution, the front top die 3 drives the middle clamping die 2 to move backward relative to the rear clamping die 1, so as to simultaneously realize the stamping deformation of the conical head 41 at the front part of the workpiece 4 and the extrusion deformation of the annular boss 42 at the middle part, improving the processing efficiency; and the front top die 3 performs stamping deformation on the conical head 41 at the front part of the workpiece 4 in two times through the first forming hole 31 and the second forming hole 32. Since the taper of the first forming hole 31 is greater than that of the second forming hole 32, the first forming hole 31 can first perform pre-stamping with a relatively small deformation amplitude on the front part of the workpiece 4, and then the second forming hole 32 performs secondary stamping deformation with a relatively large deformation amplitude on the front part of the workpiece 4. Stamping in two times greatly reduces the probability of the front part of the workpiece 4 being damaged or cracked, ensuring the processing quality.
[0020] Specifically, in this embodiment, the front top die 3 realizes the movement in the front-back direction through an external linear driving member such as a cylinder or an oil cylinder; the left rear clamping table 11 and the right rear clamping table 12 are fixed to each other after clamping. The specific fixing method is not limited in this design. For example, bolts in the left-right direction can be provided on the left rear clamping table 11, and screw holes can be provided on the right rear clamping table 12. The clamping and fixing or separation of the left rear clamping table 11 and the right rear clamping table 12 are realized through the screwing of the above-mentioned bolts and screw holes. The left middle clamping table 21 and the right middle clamping table 22 are fixed to each other after clamping. The specific fixing method is not limited in this design. For example, bolts in the left-right direction can be provided on the left middle clamping table 21, and screw holes can be provided on the right middle clamping table 22. The clamping and fixing or separation of the left middle clamping table 21 and the right middle clamping table 22 are realized through the screwing of the above-mentioned bolts and screw holes.
[0021] As Figure 4 shown, in this embodiment, the opposite surfaces of the left rear clamping table 11 and the right rear clamping table 12 are provided with rear clamping grooves 14 corresponding to the rear part of the workpiece 4. The rear clamping grooves 14 extend in the front-back direction, and the shape of the rear clamping grooves 14 is adapted to the shape of the rear part of the workpiece 4, so that the left rear clamping table 11 and the right rear clamping table 12 realize the stable clamping effect on the rear part of the workpiece 4 through the rear clamping grooves 14.
[0022] As an improvement to this embodiment, both the left rear clamping table 11 and the right rear clamping table 12 are provided with positioning holes 13 penetrating in the left-right direction. The positioning holes 13 of the left rear clamping table 11 and the right rear clamping table 12 are arranged oppositely. The positioning holes 13 of the left rear clamping table 11 and the right rear clamping table 12 are used for sliding cooperation with externally provided guide columns arranged in the left-right direction, so as to realize the guiding effect when the left rear clamping table 11 and the right rear clamping table 12 are clamped or separated in the left-right direction through the positioning holes 13.
[0023] As Figure 4As shown, in this embodiment, on the opposite faces of the left middle clamping table 21 and the right middle clamping table 22, there are middle clamping grooves 24 corresponding to the middle part of the workpiece 4. The middle clamping grooves 24 extend in the front-middle direction, and the shape of the middle clamping grooves 24 is adapted to the shape of the middle part of the workpiece 4. Thus, the left middle clamping table 21 and the right middle clamping table 22 can stably clamp the middle part of the workpiece 4 through the middle clamping grooves 24.
[0024] Combined with Figure 3 and Figure 4 As shown, in this embodiment, the forming grooves 23 are formed in the right part of the rear side of the left middle clamping table 21 and the left part of the rear side of the right middle clamping table 22 in the up-down direction, which is convenient for the machining of the forming grooves 23 of the left middle clamping table 21 and the right middle clamping table 22. The width of the forming grooves 23 in the front-rear direction corresponds to the thickness of the annular boss 42 to be machined on the workpiece 4, so as to ensure that the specification of the annular boss 42 machined on the workpiece 4 meets the requirements.
[0025] It should be noted that in the description of this application, the terms indicating directions or positional relationships such as "inner" and "outer" are based on the directions or positional relationships shown in the drawings. This is only for convenience of description, rather than indicating or implying that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this application; all directional indications (such as up, down, left, right, front, rear, inner, outer) are only used to explain the relative positional relationships and movement conditions between components in a certain specific posture. If this specific posture changes, then the directional indications will also change accordingly.
[0026] In the description of this application, the description referring to terms such as "one embodiment", "some embodiments", "in this embodiment", "specific example", or "some examples" means that the specific features, mechanisms, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0027] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in this application should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.
Claims
1. A cold heading forming tooling for a thin-walled stainless steel hook, characterized in that, Comprising: A rear clamping die (1) fixed in the front-rear direction, including a left rear clamping table (11) and a right rear clamping table (12) that can be relatively clamped, and the left rear clamping table (11) and the right rear clamping table (12) are used to clamp the rear part of the workpiece (4); A middle clamping die (2) that can move in the front-rear direction and is located on the front side of the rear clamping die (1), including a left middle clamping table (21) and a right middle clamping table (22) that can be relatively clamped, and the left middle clamping table (21) and the right middle clamping table (22) are used to clamp the middle part of the workpiece (4), and forming grooves (23) distributed around the workpiece (4) are provided on the rear sides of the left middle clamping table (21) and the right middle clamping table (22); A front top die (3) that can move in the front-rear direction and is located on the front side of the middle clamping die (2), the front top die (3) includes a first end provided with a first forming hole (31) and a second end provided with a second forming hole (32), both the first forming hole (31) and the second forming hole (32) are tapered holes and the taper of the first forming hole (31) is greater than that of the second forming hole (32), both the first forming hole (31) and the second forming hole (32) correspond to the front part of the workpiece (4), and the front top die (3) is used to abut the first end or the second end against the middle clamping die (2) and push the middle clamping die (2) to move towards the rear clamping die (1).
2. The cold heading forming tooling for the thin-walled stainless steel hook according to claim 1, wherein, Positioning holes (13) penetrating in the left-right direction are provided on both the left rear clamping table (11) and the right rear clamping table (12), and the positioning holes (13) of the left rear clamping table (11) and the right rear clamping table (12) are arranged oppositely.
3. The cold heading forming tooling for the thin-walled stainless steel hanging hook according to claim 1, characterized in that, Opposite surfaces of the left rear clamping table (11) and the right rear clamping table (12) are provided with rear clamping grooves (14) corresponding to the rear part of the workpiece (4).
4. The cold heading forming tooling for the thin-walled stainless steel hanging hook according to claim 1, characterized in that, The forming grooves (23) are provided in the right part of the rear side of the left middle clamping table (21) and the left part of the rear side of the right middle clamping table (22) in the up-down direction.
5. The cold heading forming tooling for the thin-walled stainless steel hook according to claim 1 or 4, characterized in that, The width of the forming groove (23) in the front-rear direction corresponds to the thickness of the annular boss (42) to be machined on the workpiece (4).
6. The cold heading forming tooling for the thin-walled stainless steel hook according to claim 1, characterized in that, Opposite surfaces of the left middle clamping table (21) and the right middle clamping table (22) are provided with middle clamping grooves (24) corresponding to the middle part of the workpiece (4).