Horizontal cold extrusion machine tool

Abstract

The utility model relates to a horizontal cold extrusion machine tool, which belongs to the technical field of cold extrusion machine tools, and comprises a machine tool body, a spline groove forming device, a clamping device and a reducing and extending device, the clamping device is positioned in the middle of the machine tool body, the spline groove forming device is positioned at one end of the machine tool body, and the reducing and extending device is positioned at the other end of the machine tool body. The clamping device is located between the spline groove forming device and the reducing and extending device, the clamping device is used for clamping a round pipe workpiece, the spline groove forming device is used for grooving the interior of the round pipe workpiece, the reducing and extending device is used for prolonging the length of the round pipe workpiece, a workpiece clamping hole is formed in the clamping device, and the spline groove forming device is used for forming a spline groove. The utility model provides a horizontal cold extrusion machine tool which is reasonable and simple in structure, stable in clamping of a round pipe workpiece, capable of grooving the round pipe workpiece, capable of performing cold extrusion on the round pipe workpiece to prolong the length of the workpiece, and capable of processing the outer surface of the workpiece at the same time.

Description

Technical Field

[0001] The utility model belongs to the technical field of cold extrusion machine tools, and particularly refers to a horizontal cold extrusion machine tool. Background Technique

[0002] Both spline sleeves and spline shafts are used to transmit mechanical torque. A spline connection consists of an internal spline and an external spline. Both the internal and external splines are multi-tooth parts. The spline on the inner cylindrical surface is the internal spline, and the spline on the outer cylindrical surface is the external spline. Therefore, the spline sleeve is actually the internal spline, and the spline shaft is the external spline. According to the different tooth shapes, spline connections can be divided into two categories: rectangular splines and involute splines. Both of these two types of splines have been standardized. The traditional processing process of spline sleeves is relatively complex, and the processing equipment is expensive. Therefore, the manufacturing cost of spline sleeves is relatively high.

[0003] The domestic database discloses an invention with the application number 202221626848.1 and the patent name of a broaching machine for processing spline sleeves. It includes a die bed, a hydraulic cylinder fixed bed, and a die. A hydraulic cylinder is fixed on the hydraulic cylinder fixed bed. A workpiece positioning fixture is arranged between the die bed and the hydraulic cylinder fixed bed. A die moving unit is arranged on the die bed. The die moving unit is used to support and translate the die. The die is in the shape of a cylindrical rod. Multiple slotted teeth are arranged on the outer side of the middle part of the die. The multiple slotted teeth are arranged at equal intervals along the axial direction of the die, and multiple rows of slotted teeth are arranged in a circumferential array with the central axis of the die as the center. The workpiece positioning fixture is used to position the workpiece. The workpiece is in the shape of a cylinder. When processing the workpiece, the front end of the die passes through the inside of the workpiece and is fixedly connected to the movable shaft end of the hydraulic cylinder. Although the above structure can solve the above technical problems, it can only process the internal spline groove of a circular tube workpiece. It cannot clamp the workpiece and only relies on the workpiece positioning fixture to axially position the circular tube workpiece. If the circular tube workpiece is offset, it is easy to reduce the yield rate of the circular tube workpiece, and the above structure cannot process the outer surface of the circular tube workpiece. Summary of the Invention

[0004] The purpose of the utility model is to provide a horizontal cold extrusion machine tool with a reasonable and simple structure, stable clamping of circular tube workpieces, capable of both opening slots for circular tube workpieces and cold extruding circular tube workpieces to extend the workpiece length, and at the same time capable of processing the outer surface of the workpiece.

[0005] The purpose of the utility model is achieved as follows:

[0006] A horizontal cold extrusion machine tool includes a machine body, a spline groove forming device, a clamping device, and a necking and extending device. The clamping device is located at the middle position of the machine body. The spline groove forming device is located at one end of the machine body. The necking and extending device is located at the other end of the machine body. The clamping device is located between the spline groove forming device and the necking and extending device. The clamping device is used to clamp a round tube workpiece. The spline groove forming device performs grooving processing on the inside of the round tube workpiece. The necking and extending device is used to cold extrude and extend the length of the round tube workpiece. And there is a workpiece clamping hole in the clamping device, and the central axis of this workpiece clamping hole coincides with the central axis of the spline mandrel of the spline groove forming device.

[0007] In the above-mentioned horizontal cold extrusion machine tool, the clamping device includes an oil cylinder seat, a piston cylinder, an oil cylinder cover, and an elastic chuck. The piston cylinder is located between the oil cylinder seat and the oil cylinder cover. The elastic chuck is located between the piston cylinder and the oil cylinder seat. The piston cylinder can reciprocate between the oil cylinder seat and the oil cylinder cover. The piston cylinder cooperates with the oil cylinder seat to control the elastic chuck to loosen or clamp the workpiece.

[0008] In the above-mentioned horizontal cold extrusion machine tool, both ends of the elastic chuck are provided with tapers. When the elastic chuck is in the clamping state, the inner diameters of the through holes at both ends are the same.

[0009] In the above-mentioned horizontal cold extrusion machine tool, at least part of the elastic chuck is located inside the piston cylinder.

[0010] In the above-mentioned horizontal cold extrusion machine tool, sealing sleeves are respectively arranged at both ends of the piston cylinder. Sealing rings are arranged on the outer side and the inner side of the sealing sleeve. An adjusting cylinder is arranged inside the piston cylinder, and the adjusting cylinder is connected to the piston cylinder by threads.

[0011] In the above-mentioned horizontal cold extrusion machine tool, the spline groove forming device includes a push-pull oil cylinder and a spline mandrel. The push-pull oil cylinder is fixed on the machine body, and the telescopic shaft of the push-pull oil cylinder passes through the machine body and is arranged towards the clamping device. The spline mandrel is arranged on the telescopic shaft of the push-pull oil cylinder and can reciprocate inside the workpiece clamping hole through the push-pull oil cylinder. A cooling pool for cooling the spline mandrel is arranged on the machine body, and the cooling pool is located on one side of the clamping device.

[0012] In the above-mentioned horizontal cold extrusion machine tool, a distance sensor is arranged on the push-pull oil cylinder, and the distance sensor is used to control the moving distance of the telescopic shaft of the push-pull oil cylinder.

[0013] In the above horizontal cold extrusion machine tool, the diameter-reducing and extending device includes a diameter-reducing seat, a front-back moving device and a left-right moving device. At least two diameter-reducing sleeves are provided on the diameter-reducing seat. The diameter-reducing sleeves are arranged towards the clamping device, and the diameter-reducing seat is connected to the front-back moving device. The front-back moving device controls the front-back movement of the diameter-reducing seat. The front-back moving device is connected to the left-right moving device, and the left-right moving device controls the front-back moving device to approach or move away from the clamping device. The inner diameters of the respective diameter-reducing sleeves are different.

[0014] The prominent and beneficial technical effects of the present utility model compared with the prior art are:

[0015] The present utility model clamps the round tube workpiece through the clamping device, forms a spline on the inner wall of the round tube workpiece through the spline forming device, and processes the outer side surface of the end of the round tube workpiece through the diameter-reducing and extending device. While processing, the length of the round tube workpiece is extended, and the spline forming device also processes the inner wall of the round tube workpiece when the round tube workpiece is extended. In this way, the production efficiency can be improved, and at the same time, the outer side surface of the round tube workpiece can be processed, which is convenient and fast. Description of the Drawings

[0016] Figure 1 is one of the structural schematic diagrams of the present utility model;

[0017] Figure 2 is the second structural schematic diagram of the present utility model;

[0018] Figure 3 is a partial cross-sectional view of the present utility model;

[0019] Figure 4 is an enlarged view of part A of the present utility model;

[0020] Figure 5 is a cross-sectional view of the clamping device of the present utility model without a workpiece;

[0021] Figure 6 is an exploded view of the clamping device of the present utility model.

[0022] The meanings represented by the reference numerals in the drawings:

[0023] 1 - Bed body; 2 - Spline groove forming device; 3 - Clamping device; 4 - Diameter-reducing and extending device;

[0024] 5 - Distance sensor; 6 - Workpiece abutting device; 21 - Push-pull oil cylinder; 22 - Spline mandrel; 31 - Oil cylinder seat; 32 - Piston cylinder; 33 - Oil cylinder cover; 34 - Elastic chuck; 35 - Sealing ring; 36 - Adjusting cylinder; 37 - Sealing sleeve; 41 - Multi-stage diameter-reducing seat; 42 - Front-back moving device; 43 - Left-right moving device; 44 - Diameter-reducing sleeve;

[0025] 61 - Adjusting seat; 62 - Adjusting sleeve; 63 - Locking nut. Detailed implementation manner

[0026] The present utility model will be further described below in conjunction with specific embodiments:

[0027] As Figures 1-6 shown: A horizontal cold extrusion machine tool includes a machine body 1, a spline groove forming device 2, a clamping device 3 and a necking and extending device 4. The clamping device 3 is located at the middle position of the machine body 1. The spline groove forming device 2 is located at one end of the machine body 1. The necking and extending device 4 is located at the other end of the machine body 1. The clamping device 3 is located between the spline groove forming device 2 and the necking and extending device 4. The clamping device 3 is used to clamp a round tube workpiece. The spline groove forming device 2 performs grooving processing on the inside of the round tube workpiece. The necking and extending device 4 is used for cold extruding and extending the length of the round tube workpiece. And the clamping device 3 has a workpiece clamping hole, and the central axis of this workpiece clamping hole coincides with the central axis of the spline mandrel 22 of the spline groove forming device 2, so that the coaxiality is better. The present utility model clamps the round tube workpiece through the clamping device, forms a spline on the inner wall of the round tube workpiece through the spline forming device, processes the outer side surface of the end of the round tube workpiece through the necking and extending device, and extends the length of the round tube workpiece while processing. And the spline forming device also processes the inner wall of the round tube workpiece when the round tube workpiece is extended. In this way, the production efficiency can be improved, and at the same time, the outer side surface of the round tube workpiece can be processed conveniently and quickly. The design that the central axis of the workpiece clamping hole coincides with the central axis of the spline mandrel of the spline groove forming device is for the spline mandrel to process the round tube workpiece.

[0028] In the above horizontal cold extrusion machine tool, the clamping device 3 includes an oil cylinder base 31, a piston cylinder 32, an oil cylinder cover 33 and an elastic chuck 34. The piston cylinder 32 is located between the oil cylinder base 31 and the oil cylinder cover 33, and the elastic chuck 34 is located between the piston cylinder 32 and the oil cylinder base 31. The piston cylinder 32 can reciprocate between the oil cylinder base 31 and the oil cylinder cover 33. The piston cylinder 32 cooperates with the oil cylinder base 31 to control the elastic chuck 34 to loosen or clamp the workpiece. Specifically, through the mutual cooperation of the oil cylinder base, the piston cylinder, the oil cylinder cover and the elastic chuck, when the piston cylinder moves towards the oil cylinder base, it will push the elastic chuck to contract, and the elastic chuck will clamp the round tube workpiece to ensure that it will not shift, which is convenient for the spline forming device to process the round tube workpiece. When the piston cylinder moves away from the oil cylinder base, the elastic chuck loosens the round tube workpiece, which is convenient for blanking. Moreover, a workpiece abutting device 6 is also provided on the clamping device. The workpiece abutting device includes an adjusting seat 61, an adjusting sleeve 62 and a locking nut 63. The adjusting seat is fixed on the oil cylinder base, and the adjusting sleeve is screwed into the adjusting seat. The locking nut can fix the adjusting sleeve on the adjusting seat. The outer side of the adjusting sleeve is provided with an external thread, and the adjusting seat is provided with an internal thread. The two cooperate, and one end of the adjusting sleeve close to the elastic chuck is used to abut against the round tube workpiece. By adjusting the position of the adjusting sleeve on the adjusting seat, the position of the round tube workpiece in the elastic chuck can be controlled.

[0029] In the above horizontal cold extrusion machine tool, both ends of the elastic chuck 34 are provided with tapers. When the elastic chuck 34 is in the clamped state, the inner diameters of the through holes at both ends are the same. Specifically, this can better clamp the workpiece, ensure a large clamping force, and have good coaxiality.

[0030] In the above horizontal cold extrusion machine tool, at least part of the elastic chuck 34 is located inside the piston cylinder 32.

[0031] In the above horizontal cold extrusion machine tool, sealing sleeves 37 are respectively arranged at both ends of the piston cylinder 32. Sealing rings 35 are arranged on the outer side and the inner side of the sealing sleeves 37. An adjusting cylinder 36 is arranged inside the piston cylinder 32. The adjusting cylinder 36 is connected to the piston cylinder 32 by threads. This is to ensure that the oil liquid will not seep to other positions and ensure its internal sealing performance. Moreover, the sealing sleeve is made of copper material. In this way, the position between the adjusting cylinder and the piston cylinder can be adjusted, and at the same time, the clamping force of the elastic chuck can be adjusted. When the adjusting cylinder is adjusted close to the oil cylinder base and the piston cylinder moves towards the oil cylinder base, the clamping force of the elastic chuck can be further improved. When the adjusting cylinder is adjusted away from the oil cylinder base and the piston cylinder moves towards the oil cylinder base, the clamping force of the elastic chuck will decrease.

[0032] In the above horizontal cold extrusion machine tool, the spline groove forming device 2 includes a push-pull oil cylinder 21 and a spline mandrel 22. The push-pull oil cylinder 21 is fixed on the machine body 1, and the telescopic shaft of the push-pull oil cylinder 21 passes through the machine body and is arranged towards the clamping device 3. The spline mandrel 22 is arranged on the telescopic shaft of the push-pull oil cylinder 21 and can reciprocate in the workpiece clamping hole position through the push-pull oil cylinder 21. A cooling pool for cooling the spline mandrel 22 is arranged on the machine body 1. The cooling pool is located on one side of the clamping device 3. Specifically, this is to facilitate the processing of the round tube workpiece by the spline groove forming device, and the designed cooling pool is used to cool the spline mandrel. Cooling oil is arranged in the cooling pool, which is also to make the spline mandrel have a lubricating effect and facilitate grooving the workpiece.

[0033] In the above horizontal cold extrusion machine tool, a distance sensor 5 is arranged on the push-pull oil cylinder 21. The distance sensor 5 is used to control the moving distance of the telescopic shaft of the push-pull oil cylinder 21. Specifically, this is to control the travel distance of the push-pull oil cylinder.

[0034] In the above horizontal cold extrusion machine tool, the diameter-reducing and extending device 4 includes a diameter-reducing seat 41, a front-back moving device 42 and a left-right moving device 43. The front-back moving device and the left-right moving device are prior arts. The front-back moving device includes a bracket, a slide rail and slide block device, a servo motor and a lead screw and nut assembly. The servo motor is fixed on the bracket, the slide rail and slide block device is arranged on the bracket, the multi-stage diameter-reducing seat is fixed on the slide block of the slide rail and slide block device, and the lead screw and nut assembly is connected to the slide block of the slide rail and slide block device and the bracket. The servo motor controls the rotation of the lead screw to control the front-back movement of the multi-stage diameter-reducing seat; the left-right moving device includes a slide rail and slide block device and an oil cylinder. The oil cylinder is fixed on the machine body, and the telescopic rod of the oil cylinder is connected to the slide block of the slide rail and slide block device. The slide rail of the slide rail and slide block device is arranged on the machine body, and the bracket of the front-back moving device is fixed on the slide block of the slide rail and slide block device. The telescopic rod of the oil cylinder pushes the front-back moving device to move left and right on the machine body; at least two diameter-reducing sleeves 44 are provided on the diameter-reducing seat 41. The diameter-reducing sleeves 44 face the clamping device 3, and the diameter-reducing seat 41 is connected to the front-back moving device 42. The front-back moving device 42 controls the front-back movement of the diameter-reducing seat 41. The front-back moving device 42 is connected to the left-right moving device 43. The left-right moving device 43 controls the front-back moving device 42 to approach or move away from the clamping device 3, and the inner diameters of the respective diameter-reducing sleeves 44 are different. Specifically, the outer side surface of the round tube workpiece can be processed through the diameter-reducing sleeves, and at the same time, the length of the round tube workpiece can be extended. The multi-stage diameter-reducing sleeves are used in combination with the spline groove forming device. Briefly speaking, when the round tube workpiece is clamped by the clamping device, the spline groove forming device cuts a groove in the round tube workpiece. Then, the first diameter-reducing sleeve of the multi-stage diameter-reducing device performs cold extrusion on the round tube workpiece and extends the length of the round tube workpiece. The push-pull oil cylinder of the spline groove forming device synchronously pushes the spline mandrel towards the multi-stage diameter-reducing seat; then, the second diameter-reducing sleeve of the diameter-reducing and extending device performs cold extrusion on the round tube workpiece and extends the length of the round tube workpiece. The push-pull oil cylinder of the spline groove forming device synchronously pushes the spline mandrel towards the multi-stage diameter-reducing seat again. In this way, the diameter-reducing and extending device processes the outer surface of the round tube workpiece and extends the length of the round tube workpiece.

[0035] The above embodiments are only preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A horizontal cold extrusion machine tool, characterized in that: The invention comprises a bed (1), a spline groove forming device (2), a clamping device (3) and a diameter reduction and extension device (4), wherein the clamping device (3) is located in the middle of the bed (1), the spline groove forming device (2) is located at one end of the bed (1), the diameter reduction and extension device (4) is located at the other end of the bed (1), the clamping device (3) is located between the spline groove forming device (2) and the diameter reduction and extension device (4), the clamping device (3) is used to clamp a round tube workpiece, the spline groove forming device (2) performs grooving processing on the inside of the round tube workpiece, the diameter reduction and extension device (4) is used to cold extrude and extend the length of the round tube workpiece, and the clamping device (3) has a workpiece clamping hole, the central axis of the workpiece clamping hole coincides with the central axis of a spline mandrel (22) of the spline groove forming device (2).

2. The horizontal cold extrusion machine tool according to claim 1, characterized in that: The clamping device (3) comprises a cylinder seat (31), a piston cylinder (32), a cylinder cover (33) and an elastic clamp (34); the piston cylinder (32) is located between the cylinder seat (31) and the cylinder cover (33); the elastic clamp (34) is located between the piston cylinder (32) and the cylinder seat (31); the piston cylinder (32) can reciprocate between the cylinder seat (31) and the cylinder cover (33); the piston cylinder (32) cooperates with the cylinder seat (31) to control the elastic clamp (34) to loosen or clamp a workpiece.

3. The horizontal cold extrusion machine tool according to claim 2, characterized in that: Both ends of the elastic clamp (34) are provided with tapers, and when the elastic clamp (34) is in a clamped state, the inner diameters of the through holes at both ends are the same.

4. The horizontal cold extrusion machine tool according to claim 3, characterized in that: The elastic collet (34) is at least partially located in the piston cylinder (32).

5. The horizontal cold extrusion machine tool according to claim 4, characterized in that: The two ends of the piston cylinder (32) are respectively provided with sealing sleeves (37), and the outer side and the inner side of the sealing sleeve (37) are both provided with sealing rings (35). An adjusting cylinder (36) is arranged inside the piston cylinder (32), and the adjusting cylinder (36) is connected to the piston cylinder (32) through a thread.

6. The horizontal cold extrusion machine tool according to claim 1 or 2 or 3 or 4 or 5, characterized in that: The spline groove forming device (2) comprises a push-pull cylinder (21) and a spline mandrel (22); the push-pull cylinder (21) is fixed on a bed (1), and a telescopic shaft of the push-pull cylinder (21) is arranged through the bed toward a clamping device (3); the spline mandrel (22) is arranged on the telescopic shaft of the push-pull cylinder (21) and can reciprocate in a workpiece clamping hole through the push-pull cylinder (21); a cooling pool for cooling the spline mandrel (22) is arranged on the bed (1), and the cooling pool is located on one side of the clamping device (3).

7. The horizontal cold extrusion machine tool according to claim 6, characterized in that: The push-pull oil cylinder (21) is provided with a distance sensor (5), and the distance sensor (5) is used to control the moving distance of the telescopic shaft of the push-pull oil cylinder (21).

8. The horizontal cold extrusion machine tool according to claim 1, characterized in that: The diameter-reducing and extending device (4) comprises a diameter-reducing seat (41), a front-and-back moving device (42) and a left-and-right moving device (43); the diameter-reducing seat (41) is provided with at least two diameter-reducing sleeves (44); the diameter-reducing sleeves (44) are arranged toward the clamping device (3); the diameter-reducing seat (41) is connected to the front-and-back moving device (42); the front-and-back moving device (42) controls the front-and-back movement of the diameter-reducing seat (41); the front-and-back moving device (42) is connected to the left-and-right moving device (43); the left-and-right moving device (43) controls the front-and-back moving device (42) to move closer to or farther from the clamping device (3); and the inner diameters of the respective diameter-reducing sleeves (44) are different.

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