Quenching tool for heat treatment of four rows of sun gears

Abstract

The utility model relates to the technical field of machining of mechanical parts, in particular to a heat treatment quenching tool for four rows of sun gears. Comprising a supporting piece and an extruding piece, the supporting piece is used for supporting the bottoms of the extruding piece and a workpiece, and the extruding piece is used for stably extruding the workpiece at the top of the supporting piece; the supporting piece comprises a mandrel and a lower die, and the lower die is located on the outer side of the mandrel. The extrusion part comprises sliding blocks, an outer pressing die and an inner pressing die, the sliding blocks are evenly distributed on the outer side of the lower die, the inner pressing die is located on the top of the lower die, and the outer pressing die is located on the outer side of the inner pressing die. According to the heat treatment quenching tool for the four rows of sun gears, through the structural design, the heat treatment quenching quality of products can be guaranteed, the part deformation is reduced, the heat treatment quenching tool can be applied to heat treatment quenching of other thin-wall parts according to the tool design principle, and the inner pressing die, the outer pressing die and the sliding blocks move mutually under the action of external loads; and the dimensional tolerance and cylindricity of the thin-wall part required by a drawing are ensured under the action of the tool.

Description

Technical Field

[0001] This utility model relates to the field of mechanical parts processing technology, and in particular to a heat treatment and quenching fixture for four rows of sun gears. Background Technology

[0002] With the development of the machinery industry, high-strength thin-walled parts are increasingly widely used in mechanical equipment. Traditional parts are often made in large volumes to increase strength and meet usage requirements. Currently, the trend in mechanical equipment is towards smaller size, lighter weight, and higher performance. Using traditional parts processing methods, problems such as high zero-degree turning resistance, chatter marks, and significant deformation after heat treatment cannot guarantee product quality and affect product performance. For the processing of a certain type of thin-walled high-precision four-row sun gear, we have actively explored, proposed effective methods, compiled process routes, and designed processing tooling to ensure the precision requirements of the parts.

[0003] To address this issue, a four-row sun gear heat treatment quenching fixture was designed to provide an alternative technical solution. Utility Model Content

[0004] Therefore, it is necessary to provide a four-row sun gear heat treatment quenching fixture to address the aforementioned technical problems.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A heat treatment and quenching fixture for four rows of sun gears includes a support member and an extrusion member. The support member is used to provide bottom support for the extrusion member and the workpiece, and the extrusion member is used to press and stabilize the workpiece on the top of the support member.

[0007] The support includes a mandrel and a lower mold, with the lower mold located outside the mandrel;

[0008] The extrusion component includes a slider, an outer pressure die, and an inner pressure die. The slider is evenly distributed on the outside of the lower die, the inner pressure die is located at the top of the lower die, and the outer pressure die is located on the outside of the inner pressure die.

[0009] In a preferred embodiment of the heat treatment and quenching fixture for the four rows of sun gears provided by this utility model, a chamfer is provided on the top of the outer side of the mandrel.

[0010] In a preferred embodiment of the heat treatment and quenching fixture for the four-row sun gears provided by this utility model, a first oil groove is evenly distributed at the bottom end of the outer side of the mandrel, and a second oil groove is evenly distributed at the outer side of the top end of the mandrel.

[0011] In a preferred embodiment of the heat treatment and quenching fixture for the four rows of sun gears provided by this utility model, the slider is arc-shaped.

[0012] As a preferred embodiment of the heat treatment and quenching fixture for the four rows of sun gears provided by this utility model, an extrusion slope is provided on the outer side of the top of the slider away from the lower die.

[0013] In a preferred embodiment of the heat treatment and quenching fixture for the four-row sun gears provided by this utility model, an extrusion cavity is provided on the inner side of the bottom end of the outer pressure mold, and an assembly cavity is provided on the inner side of the top end of the outer pressure mold, wherein the assembly cavity and the extrusion cavity are in communication.

[0014] As a preferred embodiment of the heat treatment and quenching fixture for the four-row sun gears provided by this utility model, a through cavity is opened inside the top of the inner pressure mold, a first through hole is opened inside one end of the top of the outer pressure mold, and a second through hole is opened inside one end of the top of the inner pressure mold.

[0015] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0016] At the same time, through the above technical solutions, this utility model has at least the following beneficial effects:

[0017] The four-row sun gear heat treatment quenching fixture provided by this utility model, through its structural design, improves the quality of heat treatment quenching of products and reduces the amount of deformation of parts. It can be applied to the heat treatment quenching of other thin-walled parts according to the fixture design principle. By utilizing the mutual movement of the inner pressure mold, outer pressure mold and slider under the action of external load, the thin-walled parts can ensure the dimensional tolerances and cylindricity required by the drawings under the action of the fixture. It is used for the heat treatment quenching of a certain type of thin-walled sun gear. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the mandrel structure of this utility model;

[0020] Figure 3 This is a top view of the mandrel of this utility model;

[0021] Figure 4 This is a schematic diagram of the lower mold of this utility model;

[0022] Figure 5 This is a top view of the lower mold of this utility model;

[0023] Figure 6 This is a schematic diagram of the slider of this utility model;

[0024] Figure 7 This is a top view of the slider of this utility model;

[0025] Figure 8 This is a schematic diagram of the structure of the external pressure mold of this utility model;

[0026] Figure 9 This is a schematic diagram of the internal pressure mold of this utility model.

[0027] In the diagram: 1. Mandrel; 2. Lower die; 3. Slider; 4. Outer die; 5. Inner die; 6. Four rows of sun gears; 7. First oil groove; 8. Second oil groove; 9. Extrusion slope; 10. Assembly cavity; 11. First through hole; 12. Through cavity; 13. Second through hole; 14. Extrusion cavity. Detailed Implementation

[0028] Reference Figures 1-9 The present invention relates to a heat treatment and quenching fixture for a four-row sun gear, comprising a support member and an extrusion member. The support member is used to provide bottom support for the extrusion member and the workpiece, and the extrusion member is used to press and stabilize the workpiece on top of the support member.

[0029] The support includes a mandrel 1 and a lower mold 2. The lower mold 2 is located outside the mandrel 1, so that the lower mold 2 can be installed on the outside of the mandrel 1. The mandrel 1 and the lower mold 2 can support the four rows of sun gears 6. The top of the outer side of the mandrel 1 is chamfered, so that the mandrel 1 can be easily assembled on the inside of the lower mold 2.

[0030] Preferably, the bottom of the outer side of the mandrel 1 is provided with a first oil groove 7 and the outer side of the top of the mandrel 1 is provided with a second oil groove 8, so that the quenching oil can be evenly covered through the flow of the first oil groove 7 and the second oil groove 8.

[0031] The extrusion component includes sliders 3, outer pressure molds 4 and inner pressure molds 5. Sliders 3 are evenly distributed on the outside of the lower molds 2. By bringing multiple lower molds 2 closer to each other, the four rows of sun gears 6 can be extruded more tightly on the outside of the lower molds 2. Thus, by extruding the four rows of sun gears 6 through the large-area contact of multiple sliders 3, the dimensional tolerance and cylindricity of the outer circle of the four rows of sun gears 6 are guaranteed. The shape of sliders 3 is arc-shaped, so that the inner diameter of multiple sliders 3 is the same as the outer diameter of the four rows of sun gears 6.

[0032] The inner pressure mold 5 is located at the top of the lower mold 2, and thus the bottom of the inner pressure mold 5 can press and stabilize the four rows of sun gears 6 on the top of the lower mold 2. Under the combined action of the inner pressure mold 5 and the lower mold 2, the inner and outer surfaces of the part maintain a certain flatness. The pressure of the press can be used to make the tooling inner pressure mold 5 move down to press the four rows of sun gears 6. The outer pressure mold 4 is located outside the inner pressure mold 5, so that the slide block 3 can be squeezed by the descent of the outer pressure mold 4. After being squeezed by the outer pressure mold 4, the slide block 3 moves towards the lower mold 2.

[0033] Preferably, an extrusion slope 9 is provided on the outer side of the top of the slider 3 away from the lower mold 2, so that the extrusion slope 9 is also arc-shaped. An extrusion cavity 14 is provided on the inner side of the bottom end of the outer pressure mold 4. The cross-section of the extrusion cavity 14 is trapezoidal, so that the outer pressure mold 4 can extrude the slider 3 through the extrusion cavity 14. An assembly cavity 10 is provided on the inner side of the top of the outer pressure mold 4. The assembly cavity 10 is connected to the extrusion cavity 14, so that the top of the inner pressure mold 5 is located inside the assembly cavity 10.

[0034] In this embodiment, a cavity 12 is provided inside the top of the inner mold 5, a first through hole 11 is provided inside the top of the outer mold 4, and a second through hole 13 is provided inside the top of the inner mold 5, so that external quenching oil can enter the cavity 12 through the first through hole 11 and the second through hole 13, and uniformly cover the top of the four rows of sun gears 6 through the cavity 12.

[0035] In this embodiment, the number of sliders 3 is six. In other embodiments, the number of sliders 3 can be set as needed.

[0036] The process of using the heat treatment quenching fixture for the four-row sun gears provided by this utility model is as follows: During heat treatment, the four-row sun gears 6 are heated to a predetermined temperature, and then mounted on a special fixture. The pressure of the press causes the inner mold 5 of the fixture to move down and press the four-row sun gears 6. Under the combined action of the inner mold 5 and the lower mold 2, the inner and outer surfaces of the four-row sun gears 6 maintain a certain flatness. At the same time, the six sliders 3 move towards the center under the action of the outer mold 4, which compresses the thin-walled outer circle of the four-row sun gears 6. Meanwhile, the outer circle of the lower mold 2 is designed with a small tolerance to position the center of the four-row sun gears 6. The six sliders 3 make large-area contact with and compress the four-row sun gears 6, ensuring the dimensional tolerance and cylindricity of the outer circle of the four-row sun gears 6. The fixture is designed with multiple oil holes and oil grooves to ensure that the quenching oil can evenly cover the four-row sun gears 6 during the quenching process and circulate externally to ensure the uniform cooling of the four-row sun gears 6. The quenching oil is supplied by a separate oil pump.

Claims

1. Four-row sun gear heat treatment quenching fixture, characterized in that, The utility model provides an extrusion device for workpiece, including support and extrusion piece, support is used to bottom support extrusion piece and workpiece, and extrusion piece is used to extrude workpiece firmly on the top of support, support includes mandrel (1) and lower mould (2), and lower mould (2) is located the outside of mandrel (1), and extrusion piece includes sliding block (3), outer pressure mould (4) and inner pressure mould (5), and sliding block (3) is evenly arranged in the outside of lower mould (2), and inner pressure mould (5) is located the top of lower mould (2), and outer pressure mould (4) is located the outside of inner pressure mould (5).

2. The four-row sun gear heat treatment quenching fixture of claim 1, wherein, The top of the outer side of the mandrel (1) is provided with a chamfer.

3. The four-row sun gear heat treatment quenching fixture of claim 1, wherein, The bottom end of the outer side of the mandrel (1) is evenly provided with a first oil groove (7), and the top end of the outer side of the mandrel (1) is evenly provided with a second oil groove (8).

4. The four-row sun gear heat treatment quenching fixture of claim 1, wherein, The sliding block (3) is arc-shaped.

5. The four-row sun gear heat treatment quenching fixture of claim 1, wherein, The outer side of the top end of the sliding block (3) away from the lower mould (2) is provided with an extrusion slope (9).

6. The four-row sun gear heat treatment quenching fixture of claim 1, wherein, The inner side of the bottom end of the outer pressure mould (4) is provided with an extrusion cavity (14), and the inner side of the top end of the outer pressure mould (4) is provided with an assembly cavity (10), and the assembly cavity (10) is through with the extrusion cavity (14).

7. The four-row sun gear heat treatment quenching fixture of claim 1, wherein, The inner side of the top end of the inner pressure mould (5) is provided with a through cavity (12), the inner side of one end of the top of the outer pressure mould (4) is provided with a first through hole (11), and the inner side of one end of the top of the inner pressure mould (5) is provided with a second through hole (13).

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