Electric spark wire cutting clamp for thin-wall special-shaped part

Abstract

The utility model relates to the technical field of machining, and discloses an electric spark wire cutting clamp for a thin-wall special-shaped part, which is characterized in that a mold is fixed on a base, and then the thin-wall special-shaped part to be machined is placed on the mold, so that the special-shaped part is attached to a supporting part; and the pressing plate assembly is used for applying pressing force to the special-shaped part on the mold base, so that the thin-wall special-shaped part to be machined is supported, pressed and fixed. The assembled electric spark wire cutting clamp is placed on a machine tool, electric spark wire cutting machining can be carried out on the thin-wall special-shaped part, the stability and consistency of products are guaranteed, and the product qualification rate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, and discloses an electric discharge wire cutting fixture for thin-walled and irregular-shaped parts. Background Art

[0002] Thin-walled parts, with their significant characteristics such as light weight and high specific strength, have been widely used in many high-precision fields such as the aerospace industry and precision machine tool manufacturing. However, in the traditional machining process, such parts are prone to significant deformation due to external factors such as cutting force and vibration.

[0003] As an advanced special machining technology, electric discharge machining has become the preferred process for machining thin-walled parts because there is no macroscopic force on the workpiece during the machining process. However, the thin-walled parts themselves have insufficient rigidity and are prone to thermal stress during the machining process, resulting in thermo-elastoplastic deformation. These factors make it particularly difficult to control the thermal deformation of thin-walled parts. When machining thin-walled parts, especially thin-walled and irregular-shaped parts, a formwork is required to fix the thin-walled parts. On the one hand, it realizes the support for the thin-walled and irregular-shaped parts and prevents deformation during the machining process; on the other hand, it can conduct heat in time and reduce the problem of thermal stress concentration. Therefore, it is necessary to design a reasonable fixture that can be applied to the contour cutting of thin-walled and irregular-shaped parts to ensure the stability and consistency of the product and improve the product qualification rate. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an electric discharge wire cutting fixture for thin-walled and irregular-shaped parts, which can realize the support and clamping fixation of the thin-walled and irregular-shaped parts to be machined, ensure the stability and consistency of the product, and improve the product qualification.

[0005] In order to achieve the above technical effects, the technical solution adopted by the utility model is:

[0006] An electric discharge wire cutting fixture for thin-walled and irregular-shaped parts, comprising:

[0007] A base, on which a linear guide rail is installed;

[0008] A formwork, which is fixedly installed on the base. The formwork is provided with a support portion that fits the irregular-shaped part, and a guide groove that cooperates with the guide rail is also provided at the bottom of the formwork;

[0009] A pressing plate assembly, which is of a cantilever structure. The fixed end of the pressing plate assembly is installed on the base, and the cantilever end of the pressing plate assembly extends to the upper surface of the formwork to apply a pressing force to the irregular-shaped part on the formwork.

[0010] Furthermore, an adjusting screw is installed on the base. One end of the adjusting screw is fixed to the base, and the other end of the adjusting screw passes through the pressing plate assembly. An adjusting nut is installed at the end of the adjusting screw away from the base through thread fit. The adjusting nut is used to adjust the pressing force of the cantilever end of the pressing plate assembly on the irregularly shaped part.

[0011] Furthermore, a through groove is formed on the cantilever end of the pressing plate assembly. The through groove is parallel to the guiding groove, and the adjusting screw is disposed in the through groove.

[0012] Furthermore, the fixed end of the pressing plate assembly is a set screw installed on the base, which is used to adjust and fix the relative height between the cantilever end and the base.

[0013] Furthermore, pin shafts are respectively arranged on both sides of the base. The two pin shafts are parallel to the guiding rail, and the central axes of the two pin shafts are located on the same straight line.

[0014] Furthermore, the bottom of the profiled tire is fixedly connected to the base by screws.

[0015] Furthermore, a fixing pin is inserted between the bottom of the profiled tire and the upper surface of the base.

[0016] Furthermore, a cushion block is arranged at the position where the pressing plate assembly contacts the irregularly shaped part.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model fixes the profiled tire on the base, then places the thin-walled irregularly shaped part to be processed on the profiled tire, makes the irregularly shaped part fit with the supporting part, and uses the pressing plate assembly to apply a pressing force to the irregularly shaped part on the profiled tire, so as to realize the support and pressing fixation of the thin-walled irregularly shaped part to be processed. By placing the assembled electric discharge wire cutting fixture on the processing machine tool, the electric discharge wire cutting processing of the thin-walled irregularly shaped part can be realized, ensuring the stability and consistency of the product and improving the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the electric discharge wire cutting fixture for thin-walled irregularly shaped parts in the embodiment;

[0019] Figure 2 It is a schematic diagram of an installation method of the profiled tire on the base in the embodiment;

[0020] Figure 3 It is a schematic diagram of another installation method of the profiled tire on the base in the embodiment;

[0021] Among them, 1. Base; 2. Guide rail; 3. Molding tire; 4. Guide groove; 5. Press plate assembly; 6. Adjusting screw; 7. Adjusting nut; 8. Through groove; 9. Set screw; 10. Axle pin; 11. Fixed pin; 12. Spacer block. Specific implementation mode

[0022] The present utility model will be further described in detail below in conjunction with the embodiments and the drawings. However, it should not be understood that the scope of the above-mentioned subject matter of the present utility model is limited to the following embodiments, and all technologies implemented based on the content of the present utility model belong to the scope of the present utility model.

[0023] Embodiment 1

[0024] See Figures 1-3 , a wire electrical discharge machining fixture for thin-walled parts with irregular shapes, comprising:

[0025] Base 1, on which a linear guide rail 2 is installed;

[0026] Molding tire 3, which is fixedly installed on the base 1, and a supporting part for fitting with the thin-walled part with an irregular shape is arranged on the molding tire 3, and a guide groove 4 for cooperating with the guide rail 2 is further arranged at the bottom of the molding tire 3;

[0027] Press plate assembly 5, the press plate assembly 5 is of a cantilever structure, the fixed end of the press plate assembly 5 is installed on the base 1, and the cantilever end of the press plate assembly 5 extends to the upper surface of the molding tire 3 for applying a pressing force to the thin-walled part with an irregular shape on the molding tire 3.

[0028] In this embodiment, by fixing the molding tire 3 on the base 1, then placing the thin-walled part with an irregular shape to be processed on the molding tire 3, making the thin-walled part with an irregular shape fit with the supporting part, and using the press plate assembly 5 to apply a pressing force to the thin-walled part with an irregular shape on the molding tire 3, the support and pressing fixation of the thin-walled part with an irregular shape to be processed are realized. By placing the assembled wire electrical discharge machining fixture on the processing machine tool, the wire electrical discharge machining of the thin-walled part with an irregular shape can be realized, ensuring the stability and consistency of the product and improving the product qualification rate.

[0029] As Figure 2 and Figure 3 shown, there are two forms of the installation method of the molding tire 3 on the base 1, and the press plate assembly 5 can be used to fix the thin-walled part with an irregular shape on the molding tire 3.

[0030] In this embodiment, an adjusting screw 6 is installed on the base 1. One end of the adjusting screw 6 is fixed to the base 1, and the other end of the adjusting screw 6 passes through the pressing plate assembly 5. An adjusting nut 7 is installed at the end of the adjusting screw 6 away from the base 1 through threaded fit. The adjusting nut 7 is used to adjust the pressing force of the cantilever end of the pressing plate assembly 5 on the irregularly shaped part, ensuring that the irregularly shaped part is not prone to displacement during the wire cutting process, and further ensuring the machining accuracy and product qualification rate.

[0031] A through groove 8 is formed on the cantilever end of the pressing plate assembly 5 in this embodiment. The through groove 8 is parallel to the guiding groove 4. The adjusting screw 6 is inserted into the through groove 8. By moving the adjusting screw 6, the relative position between the adjusting screw 6 and the fixed end of the pressing plate assembly 5 is adjusted, so that the adjusting screw 6 can adapt to the size of the mold 3, avoiding the problem that the adjusting screw 6 cannot be pressed due to interference caused by the oversize of the mold 3 when the adjusting screw 6 is installed at a fixed position.

[0032] In addition, the fixed end of the pressing plate assembly 5 in this embodiment is a set screw 9 installed on the base 1, which is used to adjust and fix the relative height between the cantilever end and the base 1 to adapt to the mold 3 structures with different height dimensions, improving the adaptability of the wire electrical discharge machining fixture to various irregularly shaped thin-walled parts.

[0033] In this embodiment, shaft pins 10 are respectively arranged on both sides of the base 1. The two shaft pins 10 are parallel to the guiding rail 2, and the central axes of the two shaft pins 10 are located on the same straight line. The two shaft pins 10 are positioned on a set of V-shaped modules supporting the wire cutting machine tool, used to position and support the whole set of fixtures, and the fixture can be adjusted to rotate the wire electrical discharge machining fixture. By installing the two cylindrical shaft pins 10 on the base 1 on the two V-shaped modules of the wire cutting machine tool, after adjusting the dimensions of the left and right end faces of the tool setting, the left and right ends are cut to the drawing dimensions, and then the two sides are cut in sequence by rotating the shaft pins 10 on the V-shaped modules by the angles of symmetry according to the drawing. In addition, the wire electrical discharge machining fixture can ensure the installation position accuracy by dial indicator alignment on the wire cutting machine tool. After rotating a certain angle on both sides, the cutting point can be quickly found, ensuring the stability and guarantee of the product dimensions after machining, and greatly increasing the efficiency.

[0034] In this embodiment, the bottom of the mold 3 is fixedly connected to the base 1 by screws. It should be noted that other ways to fix the mold 3 to the base 1 are also applicable to the present invention.

[0035] In this embodiment, a fixing pin 11 is inserted between the bottom of the mold 3 and the upper surface of the base 1. The setting of the fixing pin 11 can play a role in bearing force, thereby reducing the acting force on the guiding rail 2, guiding groove 4 or screws when the mold 3 and the base 1 slide relatively, ensuring the service life and machining accuracy of the wire electrical discharge machining fixture.

[0036] In this embodiment, a cushion block 12 is provided at the position where the pressing plate assembly 5 contacts the irregular-shaped part, which can prevent the problem of pressure damage or scratching of the thin-walled irregular-shaped part during the pressing process, and further improves the qualified rate of the processed product.

[0037] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wire electrical discharge machining fixture for thin-walled and irregularly shaped parts, characterized in that Comprising: A base (1), on which a linear guide rail (2) is installed; A mold (3), which is fixedly installed on the base (1). The mold (3) is provided with a support portion that fits the irregularly shaped part, and a guide groove (4) that cooperates with the guide rail (2) is also provided at the bottom of the mold (3); A pressing plate assembly (5), which is of a cantilever structure. The fixed end of the pressing plate assembly (5) is installed on the base (1), and the cantilever end of the pressing plate assembly (5) extends to the upper surface of the mold (3) for applying a pressing force to the irregularly shaped part on the mold (3).

2. The wire electrical discharge machining fixture for thin-walled and irregularly shaped parts according to claim 1, characterized in that, An adjusting screw (6) is installed on the base (1). One end of the adjusting screw (6) is fixed to the base (1), and the other end of the adjusting screw (6) passes through the pressing plate assembly (5). An adjusting nut (7) is installed at the end of the adjusting screw (6) away from the base (1) by means of thread fitting, and the adjusting nut (7) is used to adjust the pressing force of the cantilever end of the pressing plate assembly (5) on the irregularly shaped part.

3. The wire electrical discharge machining fixture for thin-walled and irregular-shaped parts according to claim 2, characterized in that, A through groove (8) is formed at the cantilever end of the pressing plate assembly (5). The through groove (8) is parallel to the guide groove (4), and the adjusting screw (6) is inserted into the through groove (8).

4. The wire electrical discharge machining fixture for thin-walled and irregular-shaped parts according to claim 2, characterized in that The fixed end of the pressing plate assembly (5) is a set screw (9) installed on the base (1) for adjusting and fixing the relative height between the cantilever end and the base (1).

5. The wire electrical discharge machining fixture for thin-walled and irregular-shaped parts according to claim 1, characterized in that, Axle pins (10) are respectively provided on both sides of the base (1). The two axle pins (10) are parallel to the guide rail (2), and the central axes of the two axle pins (10) are located on the same straight line.

6. The wire electrical discharge machining fixture for thin-walled and irregular-shaped parts according to claim 1, characterized in that, The bottom of the mold (3) is fixedly connected to the base (1) by screws.

7. The wire electrical discharge machining fixture for thin-walled and irregular-shaped parts according to claim 6, characterized in that, A fixing pin (11) is inserted between the bottom of the mold (3) and the upper surface of the base (1).

8. The wire electrical discharge machining fixture for thin-walled and irregular-shaped parts according to claim 1, wherein A cushion block (12) is provided at the position where the pressing plate assembly (5) contacts the irregularly shaped part.

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