Automobile transmission shaft spline forming die

Abstract

The utility model discloses a kind of spline forming die of automobile transmission shaft, it is related to automobile transmission shaft processing equipment technical field, including positioning frame, the bottom and side of the positioning frame are fixedly installed with motor and screw rod transmission assembly, the outer wall of the motor and screw rod transmission assembly screw rod of positioning frame bottom is threadedly connected with forming mechanism, the forming mechanism includes forming template and support block, the forming template is fixed on the outer wall of positioning frame by bolt, the utility model is by setting the forming tooth slot of stripping module and forming template in same vertical plane, cooperate the extension spring in the cavity inside support block and constitute elastic stripping structure, ensure that stripping module can accurately push workpiece when stripping, avoid tooth shape to scratch, the sealing property of forming space is guaranteed by the fit design of forming template and support block, effectively prevent offset when blank extrusion, significantly improve spline tooth shape integrity and dimensional accuracy.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive drive shaft processing equipment, and in particular to an automotive drive shaft spline forming mold. Background Technology

[0002] In the mold forming process of automotive drive shaft splines, the forming accuracy of the spline tooth profile directly affects the torque transmission efficiency and assembly stability of the drive shaft.

[0003] However, in the existing technology, the demolding module and the forming tooth groove of the spline forming mold often have coaxiality deviation, which can easily lead to problems such as workpiece sticking to the tooth groove and tooth scratches during demolding. In addition, during normal use, the existence of the demolding structure can easily cause irregular gaps in the forming space, which can easily affect the shape of the spline to a certain extent. Utility Model Content

[0004] The purpose of this invention is to solve the problems of easy damage to the tooth profile and poor molding quality of spline forming molds in the existing technology, and to propose a spline forming mold for automotive drive shafts.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a spline forming mold for an automotive drive shaft, comprising a positioning frame, wherein a motor and a lead screw transmission assembly are fixedly installed on the bottom and sides of the positioning frame, and a forming mechanism is threadedly connected to the outer wall of the lead screw of the motor and lead screw transmission assembly at the bottom of the positioning frame. The forming mechanism includes a forming template and a support block. The forming template is fixed to the outer wall of the positioning frame by bolts, and the support block is slidably disposed on the inner side of the positioning frame, with the top of the support block abutting against the lower surface of the forming template. The support block is threadedly connected to the lead screw of the motor and lead screw transmission assembly, and a limit hole is formed inside the support block. A release module is provided inside the support block, and the release module and the forming groove of the forming template are located on the same vertical plane.

[0006] Preferably, the support block has a cavity inside, and the detachment module is located inside the cavity.

[0007] Preferably, a tension spring is fixedly connected between the release module and the bottom of the cavity, and an inclined part is provided at the corner of the release module.

[0008] Preferably, an extension plate is provided at the top edge of the support block, and a mating groove is formed below the extension plate.

[0009] Preferably, the extension plate overlaps the top of the positioning frame, and the positioning frame has a limiting groove inside, the shape of which is adapted to the extension plate.

[0010] Preferably, a slide is threaded onto the outer wall of the lead screw on the side of the positioning frame, and an electric cylinder is fixedly installed on the slide. A pressure plate is fixedly installed at one end of the piston rod of the electric cylinder.

[0011] Preferably, guide rods are fixedly installed on the upper surfaces of both ends of the pressure plate, and the guide rods are slidably connected to the slide table.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, by setting the forming tooth grooves of the demolding module and the forming template on the same vertical plane, and cooperating with the tension spring in the cavity of the support block to form an elastic demolding structure, it is ensured that the demolding module can accurately push the workpiece during demolding, avoiding tooth scratches. The fitting design of the forming template and the support block ensures the sealing of the forming space, significantly improving the integrity of the spline tooth shape and dimensional accuracy.

[0013] 2. In this utility model, the combination of the top extension plate of the support block and the positioning frame limiting groove, as well as the combination structure of the pressure plate and guide rod driven by the side electric cylinder, achieves double precise positioning of the blank in both the lateral and axial directions. With the stable drive of the motor and screw transmission components, the stability of the mold forming process is further improved, the spline machining error is reduced, and it is suitable for the batch production needs of different specifications of transmission shafts. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of a spline forming mold for an automotive drive shaft is provided for this utility model. Figure 2 A side view of an automotive drive shaft spline forming mold is provided for this utility model; Figure 3 This utility model provides a structural breakdown diagram of the positioning frame and forming mechanism of an automotive drive shaft spline forming mold; Figure 4 This utility model provides a structural breakdown diagram of the forming mechanism of an automotive drive shaft spline forming mold; Figure 5 This utility model provides a schematic diagram of the internal disassembly of the support block of the forming mechanism of an automotive drive shaft spline forming mold.

[0015] Legend: 1. Positioning frame; 2. Motor and lead screw transmission assembly; 3. Forming mechanism; 4. Electric cylinder; 5. Pressure plate; 6. Guide rod; 7. Limiting groove; 31. Forming template; 32. Support block; 33. Docking groove; 34. Extension plate; 35. Detachable module; 36. Limiting hole; 37. Cavity; 38. Inclined part; 39. Tension spring. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0018] Example 1: As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, this utility model provides a spline forming mold for an automotive drive shaft, including a positioning frame 1. A motor and lead screw transmission assembly 2 are fixedly installed on the bottom and sides of the positioning frame 1. A forming mechanism 3 is threadedly connected to the outer wall of the lead screw of the motor and lead screw transmission assembly 2 at the bottom of the positioning frame 1. The forming mechanism 3 includes a forming template 31 and a support block 32. The forming template 31 is fixed to the outer wall of the positioning frame 1 by bolts. The support block 32 is slidably disposed on the inner side of the positioning frame 1, and the top of the support block 32 is in contact with the lower surface of the forming template 31. The support block 32 is threadedly connected to the lead screw of the motor and lead screw transmission assembly 2, and a limit hole 36 is opened inside the support block 32. A release module 35 is provided inside the support block 32. The release module 35 and the forming tooth groove of the forming template 31 are located on the same vertical plane. A cavity 37 is opened inside the support block 32. The release module 35 is located inside the cavity 37. A tension spring 39 is fixedly connected between the release module 35 and the bottom of the cavity 37. An inclined part 38 is provided at the corner of the release module 35.

[0019] The specific settings and functions of this embodiment are described in detail below. The positioning frame 1 serves as the overall support reference, and the motor and lead screw transmission assembly 2 at its bottom and side provide power. The bottom lead screw is threadedly connected to the support block 32 of the forming mechanism 3, which can drive the support block 32 to slide inside the positioning frame 1. The forming template 31 is fixed to the outer wall of the positioning frame 1 by bolts, and its lower surface fits against the top of the support block 32 to form a forming space. In use, the cylindrical blank that has undergone pretreatment annealing, phosphating, and saponification lubrication is placed into the cold extrusion mold. High pressure is applied to cause the blank to undergo plastic flow under the constraint of the forming space, filling the spline tooth cavity and forming the spline shaft teeth in one step. The structure is as follows: after molding, the motor and lead screw transmission assembly 2 drives the support block 32, causing the demolding module 35 to move below the molding space. At this time, the obstruction of the molding template 31 is removed, and the tension spring 39 pushes it upward under the restoring force, separating the molded workpiece from the tooth groove. During the demolding process, the spline can rotate freely without wear. After demolding is completed, the motor and lead screw transmission assembly 2 moves the support block 32 back to the disposal position. The presence of the inclined part 38 ensures that the demolding module 35 can be properly pressed into the cavity 37. Overall, it not only ensures the dimensional accuracy and tooth integrity of the spline molding, but also improves the convenience of operation and production efficiency.

[0020] Example 2: Figure 1 , Figure 3 and Figure 4 As shown, an extension plate 34 is provided at the top edge of the support block 32, and a mating groove 33 is formed below the extension plate 34. The extension plate 34 overlaps the top of the positioning frame 1. A limiting groove 7 is opened inside the positioning frame 1. The shape of the limiting groove 7 is adapted to the extension plate 34. A slide is threadedly connected to the outer wall of the lead screw on the side of the positioning frame 1, and an electric cylinder 4 is fixedly installed on the slide. A pressure plate 5 is fixedly installed at one end of the piston rod of the electric cylinder 4. Guide rods 6 are fixedly installed on the upper surfaces of both ends of the pressure plate 5. The guide rods 6 are slidably connected to the slide.

[0021] The overall effect of this embodiment is as follows: a mating groove 33 is formed below the extension plate 34 at the top edge of the support block 32 to ensure that the extension plate 34 is set in an overlapping state on the top of the positioning frame 1. The limiting groove 7 is adapted to the shape of the extension plate 34 to achieve lateral positioning of the support block 32. The motor and lead screw transmission assembly 2 on the side of the positioning frame 1 drive the slide table to move to adjust the height of the pressure plate 5. The extension and retraction of the piston rod of the electric cylinder 4 drives the pressure plate 5 to move axially. The guide rod 6 slides with the slide table to ensure that the pressure plate 5 moves smoothly. Finally, the pressure plate 5 presses the blank on the support block 32 to provide axial fixation for spline forming. The extension plate 34 and the mating groove 33 cooperate to overlap the positioning frame 1. Combined with the adaptation and positioning of the limiting groove 7, the stability of the support block 32 during forming is enhanced, and displacement under high pressure is avoided. All components work together to achieve accurate positioning and stable pressing of the blank, improve the dimensional accuracy and tooth consistency of spline forming, and optimize production reliability.

[0022] The operating method and working principle of this device are as follows: A cylindrical blank, pretreated by annealing, phosphating, and saponification lubrication, is placed into the molding space formed by the support block 32 and the molding template 31. The motor and lead screw transmission assembly 2 on the side of the positioning frame 1 drive the slide table to move, adjusting the pressure plate 5 to the appropriate position. The piston rod of the electric cylinder 4 extends, driving the pressure plate 5 to move axially. The guide rods 6 at both ends of the pressure plate 5 slide against the slide table, ensuring smooth movement of the pressure plate 5 and pressing the blank, thus fixing the blank axially. By applying high pressure, the blank undergoes plastic flow under the constraint of the molding space, filling the molding template 31. The spline tooth-shaped cavity is formed in one step, and the spline shaft tooth structure is formed. After forming, the piston rod of the electric cylinder 4 retracts and drives the pressure plate 5 to reset. The motor and lead screw transmission assembly 2 at the bottom of the positioning frame 1 drives the support block 32. The demolding module 35 loses the obstruction of the forming template 31 and is pushed upward under the reset elastic force of the tension spring 39 at the bottom of the cavity 37, thus separating the formed workpiece from the tooth groove. After demolding, the motor and lead screw transmission assembly 2 drives the support block 32 to move back to the initial position. The inclined part 38 can ensure that the demolding module 35 is pressed into the cavity 37. The tension spring 39 is compressed and stores energy, ready for the next forming operation.

[0023] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A spline forming mold for an automotive drive shaft, comprising a positioning frame (1), characterized in that: The bottom and sides of the positioning frame (1) are fixedly installed with a motor and lead screw transmission assembly (2). The outer wall of the lead screw of the motor and lead screw transmission assembly (2) at the bottom of the positioning frame (1) is threaded with a forming mechanism (3). The forming mechanism (3) includes a forming template (31) and a support block (32). The forming template (31) is fixed to the outer wall of the positioning frame (1) by bolts. The support block (32) is slidably disposed on the inner side of the positioning frame (1), and the top of the support block (32) is in contact with the lower surface of the forming template (31). The support block (32) is threadedly connected to the lead screw of the motor and lead screw transmission assembly (2), and a limit hole (36) is opened inside the support block (32). A release module (35) is provided inside the support block (32). The release module (35) and the forming tooth groove of the forming template (31) are located on the same vertical plane.

2. The automotive drive shaft spline forming mold according to claim 1, characterized in that: The support block (32) has a cavity (37) inside, and the detachment module (35) is located inside the cavity (37).

3. The automotive drive shaft spline forming mold according to claim 1, characterized in that: A tension spring (39) is fixedly connected between the bottom of the release module (35) and the cavity (37), and an inclined part (38) is provided at the corner of the release module (35).

4. The automotive drive shaft spline forming mold according to claim 1, characterized in that: An extension plate (34) is provided at the top edge of the support block (32), and a mating groove (33) is formed below the extension plate (34).

5. The automotive drive shaft spline forming mold according to claim 4, characterized in that: The extension plate (34) overlaps the top of the positioning frame (1), and the positioning frame (1) has a limiting groove (7) inside, the shape of which is adapted to the extension plate (34).

6. The automotive drive shaft spline forming mold according to claim 1, characterized in that: The positioning frame (1) has a slide connected to the outer wall of the side screw, and an electric cylinder (4) is fixedly installed on the slide. A pressure plate (5) is fixedly installed at one end of the piston rod of the electric cylinder (4).

7. The automotive drive shaft spline forming mold according to claim 6, characterized in that: Guide rods (6) are fixedly installed on the upper surfaces of both ends of the pressure plate (5), and the guide rods (6) are slidably connected to the slide table.

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