Forging die for half shaft with disc

Abstract

The utility model relates to the technical field of dies, and discloses a forging die for a half shaft with a reel, which comprises two die bodies which can be spliced with each other, a clamping position for a workpiece to pass through is formed between the die bodies, and the die bodies are provided with fastening mechanisms which are close to the middle of the clamping position for secondary clamping after the two die bodies are spliced. The fastening mechanism comprises a clamping block capable of being close to or away from the clamping position, movement of the clamping block is controlled by a driving assembly, after the die bodies are spliced, the clamping block is driven by the driving assembly to continue to be close to the middle of the clamping position, the workpiece is secondarily clamped, and the situation that the workpiece cannot be clamped due to abrasion of the die bodies can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of moulds, in particular to a forging mould for a disc half shaft. Background Art

[0002] Chinese Patent with publication number CN202752522U discloses a combined half shaft forging rotary swaging die. The die includes an upper die and a lower die. A first forging structure is formed on the end face of the upper die facing the lower die. The lower die includes lower templates symmetrically arranged in pairs. After the lower templates are assembled, a through hole for the raw material of the half shaft part to enter is formed in the middle. A second forging structure is provided on the inner wall of the through hole close to the upper template.

[0003] The raw material of the half shaft part is a cylindrical bar workpiece. After its end is heated, it extends between the two lower templates. Subsequently, the lower templates cooperate to clamp the middle of the workpiece by using the inner wall of the through hole, and the heated end is placed between the first forging structure and the second forging structure. Then, the upper template is driven to approach the lower template for forging. During this process, the workpiece remains stationary by means of the frictional force generated by its contact with the two lower templates on both sides. However, this will gradually wear the lower templates. When the inner wall of the through hole of the lower template is worn, the workpiece cannot be clamped during forging, which will increase the defective rate of forging and thus affect subsequent processing. At this time, the worn part needs to be compensated by repairing the die, which is rather troublesome. Therefore, there is still room for improvement in the existing half shaft forging die. Summary of the Utility Model

[0004] Aiming at the shortcomings that the existing half shaft forging die will be worn after frequent use, resulting in the situation that the workpiece cannot be clamped during forging and increasing the defective rate of forging, the purpose of the utility model is to provide a forging die for a disc half shaft that can reduce the loosening of the workpiece during forging due to die wear.

[0005] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0006] A forging die for a disc half shaft includes two die bodies that can be assembled with each other. A clamping position for the workpiece to pass through is formed between the die bodies. A fastening mechanism is provided on the die bodies to approach the middle of the clamping position for secondary clamping when the two die bodies are assembled. The fastening mechanism includes a clamping block that can approach or move away from the clamping position, and the movement of the clamping block is controlled by a driving component.

[0007] With the above scheme, when the die bodies are assembled, the clamping block is driven by the driving component to continue approaching the middle of the clamping position, playing a role in secondary clamping of the workpiece, and can effectively reduce the situation that the workpiece cannot be clamped due to die body wear.

[0008] Preferably, a receiving groove is recessed in the mold body at the clamping position, the clamping block is guidingly slidably arranged in the receiving groove, and the driving assembly includes a pair of connecting rods hinged at the ends on the clamping block, guiding members respectively connected to the other ends of the connecting rods, and a driving member for driving the ends of the connecting rods to approach or separate from each other along the guiding assembly.

[0009] Preferably, the guiding members include guide rods fixedly arranged in the receiving groove and a pair of sliders guidingly slidably arranged on the guide rods, and the ends of the connecting rods away from the clamping block are respectively hinged on the sliders.

[0010] Preferably, the driving member includes a driving rod arranged parallel to the guide rod and capable of self-rotation, threaded sections with opposite thread directions opened at both ends of the driving rod, and threaded holes arranged on the sliders and capable of cooperating with the threaded sections respectively.

[0011] With the above scheme, when the driving rod rotates unidirectionally in this scheme, it can drive the two sliders to approach or separate from each other simultaneously. When the sliders approach each other, the connecting rods close, and the clamping block extends out of the receiving groove and approaches the clamping position; when the sliders separate from each other, the connecting rods open, and the clamping block moves away from the clamping position and retracts into the receiving groove. The two threaded sections are set to have the same pitch, so that when the driving rod rotates, the two sliders move the same distance, reducing the probability of the clamping block offset and guiding it to telescopically move relative to the receiving groove; the threaded connection has good self-locking property, and the clamping block is not easily loosened after clamping the workpiece.

[0012] Preferably, one end of the driving rod extends to the outside of the mold and an operating block is arranged at the end.

[0013] With the above scheme, people can use tools to cooperate with the operating block to drive the driving rod to rotate, and it is more convenient to adjust the tightness of the cooperation between the clamping block and the workpiece when the mold bodies are assembled.

[0014] Preferably, a curved surface or an arc surface capable of fitting the outer wall of the part is formed on one side of the clamping block facing the clamping position.

[0015] With the above scheme, the purpose is to enable the clamping block to better cooperate with the outer surface of the part, increase the friction force by increasing the contact area, and further increase the clamping force.

[0016] Preferably, a forging structure is arranged on the end surface of the mold body, a ring-shaped mating projection is formed around the opening of the clamping position after the mold bodies are assembled, and a fillet is arranged at the edge of the mating projection.

[0017] With the above solution, the half - shaft part is generally divided into two parts: the shaft body and the flange. For its specific structure, reference can be made to the half - shaft of a light - truck vehicle disclosed in the Chinese patent with the publication number CN202357798U. Generally, a convex curved surface or dome - shaped structure is provided on the part of the flange facing away from the shaft body, and a corresponding concave structure is also provided on the other side. The convex part is usually formed by forging, while the concave structure is usually first forged into a flat structure and then machined by cutting to produce the concave structure. However, cutting will damage the lattice arrangement of the metal material, reducing its overall strength. If the concave structure is to be processed by forging, corresponding convex forging structures need to be set on the die body. This will cause the convex forging structure to be engaged with the concave workpiece structure after forging. To remove the workpiece, it is necessary to first push the workpiece forward to drive the separation of the concave structure from the convex forging structure, and then the die body can be separated. There is a contradiction when using traditional dies here. When the die body is not separated, the friction force at the clamping position will prevent the workpiece from being pushed forward, and without pushing the workpiece, the die body cannot be separated. If the die body is forcibly separated, it will squeeze the workpiece and cause certain damage. Since the processed part of the workpiece is still in a high - temperature state and has low hardness, it is easy to deform after being squeezed. Therefore, when using traditional dies to directly forge the concave structure, there will be difficulties in demolding. Therefore, most manufacturers still use the cutting - machining method to process the concave structure on the flange.

[0018] In this solution, the clamping block on the die body can adjust the clamping force. The clamping block can be loosened first when the die body is not separated, thereby reducing the restriction of the die body on the workpiece and making the workpiece easy to push. In this way, the demolding difficulty of the concave structure of the flange part processed by integral forging is reduced, and at the same time, the flange can retain the complete lattice arrangement during subsequent cutting machining, increasing the overall strength of the flange part.

[0019] Due to the adoption of the above - mentioned technical solution, the present utility model has significant technical effects: when the die body is assembled, the clamping block is driven by the driving component to continue approaching the middle of the clamping position, playing a role of secondary clamping on the workpiece, and can effectively reduce the situation where the workpiece cannot be clamped due to die - body wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the external - structure schematic diagram of a forging die of a half - shaft with a disc in this embodiment;

[0021] Figure 2 is the front view of a forging die of a half - shaft with a disc in this embodiment;

[0022] Figure 3 is Figure 2 the sectional view taken along A - A in

[0023] Figure 4 is Figure 3Partial enlarged view of a in;

[0024] Figure 5 is Figure 2 Cross-sectional view of B-B in;

[0025] Figure 6 is is Figure 5 Partial enlarged view of b in;

[0026] Figure 7 It is a schematic structural split view of a forging die of a disc half shaft in this embodiment;

[0027] Figure 8 is Figure 7 Partial enlarged view of c in.

[0028] The names of the parts referred to by each digital label in the above drawings are as follows: 1, die body; 2, clamping position; 3, clamping block; 4, accommodating groove; 5, connecting rod; 6, guide rod; 7, slider; 8, driving rod; 9, threaded section; 10, threaded hole; 11, operating block; 12, mating protrusion. Specific implementation mode

[0029] The present utility model will be further described in detail below in conjunction with the drawings and embodiments.

[0030] Embodiment

[0031] A forging die of a disc half shaft, according to Figure 1 、 2 、7 shows, including two die bodies 1 that can be mutually assembled, a forging structure is provided on the end surface of the die body 1, a ring-shaped mating protrusion 12 is formed around the opening of the clamping position 2 after the die bodies 1 are assembled, a chamfer is provided at the edge of the mating protrusion 12, a clamping position 2 for the workpiece to pass through is formed between the die bodies 1, and a fastening mechanism is provided on the die body 1 that moves towards the middle of the clamping position 2 for secondary clamping after the two die bodies 1 are assembled. According to Figure 4 shows, the fastening mechanism includes a clamping block 3 that can approach or move away from the clamping position 2, a die body 1 is recessed at the clamping position 2 to form an accommodating groove 4, and the clamping block 3 is guided and slidably arranged in the accommodating groove 4.

[0032] The movement of the clamping block 3 is controlled by a driving assembly. According to Figure 4 、 6 、8 shows, the driving assembly includes a pair of connecting rods 5 whose ends are hinged to the clamping block 3, the other ends of the connecting rods 5 are respectively connected to the guiding members, the guiding members include guide rods 6 fixedly arranged in the accommodating groove 4, a pair of sliders 7 are guided and slidably arranged on the guide rods 6, the ends of the connecting rods 5 away from the clamping block 3 are respectively hinged to the sliders 7, and the driving assembly further includes a driving member that drives the ends of the connecting rods 5 to approach or move away from each other along the guiding assembly. According to Figure 4 、6 As shown in the figure, the driving component includes a driving rod 8 that is arranged parallel to the relative guide rod 6 and can rotate self - rotatably. One end of the driving rod 8 passes through the side wall of the accommodating groove 4 to the side of the mold body 1 facing away from the forging structure, and an operating block 11 is arranged at the end. Threaded sections 9 with opposite helix directions are provided at both ends of the driving rod 8, and threaded holes 10 that can cooperate with the threaded sections 9 respectively are arranged on the slider 7.

[0033] Combined with the above structure, referring to Figures 1 to 8 it can be known that when a forging die for a disc - type half - shaft in this embodiment is in use, before machining and opening, the workpiece is first placed on the clamping position 2 of one of the mold bodies 1, and the two mold bodies 1 are driven to be joined together. After joining, the operator uses a tool to cooperate with the operating block 11 to tighten the operating block 11, driving the clamping block 3 to approach the middle of the clamping position 2 to clamp the workpiece for the second time; after forging, the operating block 11 is first loosened to retract the clamping block 3 into the accommodating groove 4, and then the workpiece is pushed forward to make the concave structure on the workpiece separate from the forging structure, and then the mold bodies 1 are separated to take out the workpiece semi - finished product.

[0034] This die plays a role in clamping the workpiece for the second time, which can effectively reduce the situation that the workpiece cannot be clamped due to the wear of the mold body 1. And by utilizing the self - locking property of the screw drive, the clamping block 3 is not easy to loosen after clamping the workpiece. The characteristic that the clamping block 3 can adjust the tightness reduces the demolding difficulty of the concave structure of the flange part processed by integral forging, enabling the flange to retain a complete crystal lattice arrangement during subsequent cutting processing and increasing the overall strength of the half - shaft part.

[0035] Finally, it should be noted that the above - mentioned are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent substitution on some of the technical features. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A forging die for a disc half shaft, comprising two die bodies (1) that can be assembled with each other, and a clamping position (2) for the workpiece to pass through is formed between the die bodies (1), and it is characterized in that: The mold body (1) is provided with a fastening mechanism that moves towards the middle of the clamping position (2) for secondary clamping after the two mold bodies (1) are joined. The fastening mechanism includes a clamping block (3) that can approach or move away from the clamping position (2), and the movement of the clamping block (3) is controlled by a driving assembly.

2. The forging die for a disc half shaft according to claim 1, characterized in that: The mold body (1) is recessed at the clamping position (2) to form a receiving groove (4). The clamping block (3) is guidingly slidably arranged in the receiving groove (4). The driving assembly includes a pair of connecting rods (5) whose ends are hinged to the clamping block (3), a guiding member respectively connected to the other ends of the connecting rods (5), and a driving member that drives the ends of the connecting rods (5) to approach or move away from each other along the guiding assembly.

3. A forging die for a disc half shaft according to claim 2, characterized in that: The guiding member includes a guide rod (6) fixedly arranged in the receiving groove (4) and a pair of sliders (7) guidingly slidably arranged on the guide rod (6). The ends of the connecting rods (5) away from the clamping block (3) are respectively hinged to the sliders (7).

4. A forging die for a disc half shaft according to claim 3, characterized in that: The driving member includes a driving rod (8) arranged parallel to the guide rod (6) and capable of self-rotation, helical segments (9) with opposite helix directions opened at both ends of the driving rod (8), and threaded holes (10) arranged on the sliders (7) that can respectively cooperate with the helical segments (9).

5. A forging die for a disc half shaft according to claim 4, characterized in that: One end of the driving rod (8) extends to the outside of the mold and an operation block (11) is arranged at the end.

6. A forging die for a disc half shaft according to claim 1, characterized in that: The side of the clamping block (3) facing the clamping position (2) forms a curved surface or arc surface that can fit the outer wall of the part.

7. A forging die for a disc half shaft according to claim 1, characterized in that: A forging structure is arranged on the end face of the mold body (1). After the mold bodies (1) are joined, a ring-shaped mating projection (12) is formed around the opening of the clamping position (2), and the edge of the mating projection (12) is provided with a chamfer.

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