Shaping tool for hollow rotating shaft part

Abstract

The utility model discloses a hollow rotating shaft part shaping tool which comprises a lower installation base and an upper installation base, a lower die base is arranged on the upper portion of the lower installation base, an upper die base is arranged on the lower portion of the upper installation base, a sliding block is arranged in the lower die base, and a lower shaping cavity is formed in the surface of the sliding block. A lower mold cavity insert is arranged in the lower shaping cavity, an upper shaping cavity is formed in the upper mold base, and the upper shaping cavity corresponds to the lower shaping cavity. After the upper die and the lower die are closed, the sliding block and the shaping cavity are used for extruding the appearance part of a product, the shaping function can be achieved, the product performance is not affected, the deformation control problem of the powder injection molding sintering process is solved, the size correction precision reaches + / -0.02 mm, and the appearance indentation defect caused by traditional shaping is eliminated; and the size springback phenomenon caused by residual stress release after sintering is effectively inhibited.

Description

Technical Field

[0001] This utility model relates to the field of shaping fixtures for hollow rotating shaft parts, and more specifically to a shaping fixture for hollow rotating shaft parts. Background Technology

[0002] Metal powder injection molding (MIM) is an advanced technology that combines the advantages of plastic injection molding and powder metallurgy. It is particularly suitable for mass production of metal parts with precise and complex structures, three-dimensional irregular shapes, or special properties. The resulting products combine the high molding precision of plastic injection molding with the excellent physical and chemical properties of forgings, offering significant advantages in the manufacturing of complex precision parts. The general process flow is as follows: the selected powder is mixed with a binder, then the feedstock is granulated and injected into the desired shape. After molding, the binder is removed, and the debinded preform is sintered. Sintering is a high-temperature treatment process that strengthens and densifies the formed powder preform, directly affecting product quality.

[0003] In the production of laptop hinge components, dimensional deviations after the sintering process lead to product defects. Therefore, a new technical solution is needed to address this issue. Utility Model Content

[0004] The purpose of this utility model is to provide a shaping fixture for hollow hinge parts, which solves the problem of dimensional deviations after sintering in the production of laptop hinge parts, leading to product defects.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a shaping fixture for hollow rotating shaft parts, comprising: a lower mounting base and an upper mounting base, wherein a lower mold base is provided on the upper part of the lower mounting base and an upper mold base is provided on the lower part of the upper mounting base, a slider is provided inside the lower mold base and a lower shaping cavity is provided on the surface of the slider, a lower mold cavity insert is provided inside the lower shaping cavity, an upper shaping cavity is provided inside the upper mold base and the upper shaping cavity corresponds to the lower shaping cavity, an upper mold cavity insert is provided inside the shaping cavity, and upper mold wedge blocks are provided on both sides of the upper mold base and the upper mold wedge blocks are fitted into the mounting grooves of the slider.

[0006] In a preferred embodiment of this utility model, the lower part of the upper mold base is provided with four sets of guide pillars and the interior of the lower mold base is provided with corresponding guide holes.

[0007] In a preferred embodiment of the present invention, the upper shaping cavity is provided with a limiting block and the lower shaping cavity is provided with corresponding limiting grooves.

[0008] In a preferred embodiment of this utility model, the lower shaping cavity is provided with a positioning hole.

[0009] In a preferred embodiment of this utility model, both sides of the slider and both sides of the upper mold wedge block are provided with matching wedge surfaces.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] This utility model shaping fixture is assembled and operated on a hydraulic press. During the mold closing process, the upper mold base wedge surface and the lower mold base wedge surface push the slider, and the upper mold shaping cavity and the lower mold shaping cavity close together to extrude the product to achieve the requirements of straightness and concentricity. After the upper and lower molds are closed, the slider and the shaping cavity are used to extrude the product's outer shape, which can realize the shaping function without affecting the product performance. It solves the deformation control problem of powder injection molding sintering process, and the dimensional correction accuracy reaches ±0.02mm. It also eliminates the appearance indentation defects caused by traditional shaping and effectively suppresses the dimensional springback phenomenon caused by the release of residual stress after sintering. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the lower mold base structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the upper mold base structure of this utility model.

[0015] In the diagram: 1. Lower mounting base; 2. Lower mold base; 3. Upper mounting base; 4. Upper mold base; 5. Guide post; 6. Lower forming cavity; 7. Lower mold cavity insert; 8. Limiting groove; 9. Positioning hole; 10. Upper mold wedge block; 11. Upper mold forming cavity; 12. Limiting block; 13. Slider. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-3This utility model provides a technical solution: a shaping fixture for hollow rotating shaft parts, comprising: a lower mounting base 1 and an upper mounting base 3. A lower mold base 2 is provided on the upper part of the lower mounting base 1, and an upper mold base 4 is provided on the lower part of the upper mounting base 3. A slider 13 is provided inside the lower mold base 2, and a lower shaping cavity 6 is provided on the surface of the slider 13. A lower mold cavity insert 7 is provided inside the lower shaping cavity 6. An upper shaping cavity 11 is provided inside the upper mold base 4, and the upper shaping cavity 11 corresponds to the lower shaping cavity 6. An upper mold cavity insert 14 is provided inside the shaping cavity. Upper mold wedge blocks 10 are provided on both sides of the upper mold base 4, and the upper mold... The wedge block 10 and the slider 13 are fitted together in the mounting slots. The upper mold base 4 is connected to the external drive equipment, and the lower mold base 2 is installed at the bottom of the drive equipment. During the mold closing process, the slider 13 is pushed by the wedge surface of the upper mold base 4 and the wedge surface of the lower mold base 2. The upper mold forming cavity and the lower mold forming cavity are closed and cooperated to extrude the product to achieve the requirements of straightness and concentricity of the product. It can realize the forming function without affecting the product performance, solve the deformation control problem of powder injection molding sintering process, achieve dimensional correction accuracy of ±0.02mm and eliminate the appearance indentation defects caused by traditional forming, and effectively suppress the dimensional springback phenomenon caused by residual stress release after sintering.

[0018] Further improvements, such as Figure 1 As shown: The lower part of the upper mold base 4 is provided with four sets of guide pillars 5 and the interior of the lower mold base 2 is provided with corresponding guide holes. By setting the guide pillars 5 and guide holes, the upper mold base 4 and the lower mold base 2 can be accurately aligned during the mold closing process, improving the stability and accuracy of the forming fixture, and avoiding poor forming effect or product damage caused by mold misalignment.

[0019] Further improvements, such as Figure 2 , 3 As shown: The upper forming cavity 11 is provided with a limiting block 12 and the lower forming cavity 6 is provided with corresponding limiting grooves 8. The design of the limiting block 12 and the limiting grooves 8 can restrict the relative movement of the upper forming cavity 11 and the lower forming cavity 6 during the mold closing process, ensuring the positioning and stability of the product during the forming process, and further improving the forming accuracy and product quality consistency.

[0020] Further improvements, such as Figure 2 As shown: The lower shaping cavity 6 is provided with a positioning hole 9. The design of the positioning hole 9 facilitates the precise positioning of the product during the shaping process, ensuring that the product is in the correct position and posture in the shaping cavity.

[0021] Further improvements, such as Figure 2 , 3As shown: Both sides of the slider 13 and both sides of the upper mold wedge block 10 are provided with matching wedge surfaces. The design of the wedge surfaces enables the slider 13 and the upper mold wedge block 10 to cooperate and move more smoothly during the mold closing process, reducing friction and resistance, and improving the operating efficiency and stability of the forming fixture.

[0022] Working principle: The upper mold base 4 of this utility model is connected to an external driving device, while the lower mold base 2 is installed at the lower part of the driving device. During the mold closing process, the wedge-shaped surfaces of the upper mold base 4 and the lower mold base 2 push the slider 13. The upper mold forming cavity and the lower mold forming cavity close and cooperate to extrude the product to achieve the requirements of straightness and concentricity of the product. It can realize the forming function without affecting the product performance, solve the deformation control problem of powder injection molding sintering process, achieve dimensional correction accuracy of ±0.02mm, eliminate the appearance indentation defects caused by traditional forming, and effectively suppress the dimensional springback phenomenon caused by residual stress release after sintering.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0024] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can refer to mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc., are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0025] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A shaping fixture for hollow rotating shaft parts, characterized in that: include: The lower mounting base (1) and the upper mounting base (3) are provided with a lower mold base (2) at the upper part of the lower mounting base (1) and an upper mold base (4) at the lower part of the upper mounting base (3). A slider (13) is provided inside the lower mold base (2) and a lower shaping cavity (6) is provided on the surface of the slider (13). A lower mold cavity insert (7) is provided inside the lower shaping cavity (6). An upper shaping cavity (11) is provided inside the upper mold base (4) and the upper shaping cavity (11) corresponds to the lower shaping cavity (6). An upper mold cavity insert (14) is provided inside the shaping cavity. Upper mold wedge blocks (10) are provided on both sides of the upper mold base (4) and the upper mold wedge blocks (10) are fitted into the mounting groove of the slider (13).

2. The hollow shaft part forming fixture according to claim 1, characterized in that: The lower part of the upper mold base (4) is provided with four sets of guide pillars (5), and the interior of the lower mold base (2) is provided with corresponding guide holes.

3. The hollow rotating shaft part shaping fixture according to claim 1, characterized in that: The upper shaping cavity (11) is provided with a limiting block (12) and the lower shaping cavity (6) is provided with corresponding limiting grooves (8).

4. The hollow rotating shaft part forming fixture according to claim 1, characterized in that: The lower shaping cavity (6) is provided with a positioning hole (9).

5. The forming fixture for a hollow rotating shaft part according to claim 1, characterized in that: Both sides of the slider (13) and both sides of the upper die wedge block (10) are provided with matching wedge surfaces.

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