A helical gear electric spark machining jig

Abstract

This utility model relates to the field of electrical discharge machining (EDM), specifically disclosing a helical gear EDM fixture, including a fixture body. The fixture body includes a support sleeve and a meshing screw. The upper inner side of the support sleeve has a meshing thread, and the lower end of the meshing screw has a beveled end. A support washer ring is installed on the outer side of the support sleeve. Above the support washer ring, on the outer side of the support sleeve, there is a ring array of bent rod through holes. A fastening bent rod is installed inside the bent rod through hole, and a spring washer is installed on the outer side of the fastening bent rod. A return spring is connected between the spring washer and the support sleeve. By controlling the application of torque to the meshing screw and the meshing thread to move inward toward the support sleeve, the multiple fastening bent rods are pressed against the inner wall of the keyway of the cutting sheet metal. This ensures the accuracy of the gear dimensions during cutting and provides support to prevent it from falling after processing.

Description

Technical Field

[0001] This utility model relates to the field of electrical discharge machining, specifically a fixture for helical gear electrical discharge machining. Background Technology

[0002] Electrical discharge machining (EDM) is a machining process that uses discharge electrodes with specific geometric shapes to burn the geometry of conductive metal parts. EDM is commonly used in the production of blanking dies and casting molds. EDM is based on the principle of pulse discharge between the electrode and the workpiece. The high temperature generated by the pulse discharge melts and vaporizes the metal, causing it to be eroded. In gear machining, the shape of the tool electrode is usually matched with the tooth profile of the gear being machined. By precisely controlling the discharge gap and pulse parameters, the gear can be precisely machined. It is suitable for machining gears with complex shapes. The sheet metal being machined usually needs to be positioned using a jig.

[0003] However, since the fixtures used for EDM gear machining are mostly clamped on the outside of multiple plates, the gear may fall as a whole after the etching is completed, which can easily cause damage to the gear teeth. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a helical gear EDM fixture, which solves the problems mentioned in the background.

[0005] This utility model provides the following technical solution: a helical gear EDM fixture, comprising a fixture body, the fixture body comprising: a support sleeve and a meshing screw, the upper inner side of the support sleeve having a meshing thread, the lower end of the meshing screw having a beveled end, a support washer ring installed on the outer side of the support sleeve, and a bent rod through hole arranged in an annular array above the support washer ring on the outer side of the support sleeve, a fastening bent rod being provided inside the bent rod through hole, a spring washer plate installed on the outer side of the fastening bent rod, and a return spring connecting the spring washer plate and the support sleeve.

[0006] As a further improvement of this utility model, a cutting plate is provided on the outer side of the main body of the fixture.

[0007] As a further improvement of this utility model: a bottom storage compartment is installed at the lower end of the main body of the fixture, and an adjustment groove is arrayed on the upper surface of the bottom storage compartment, and a support rod is installed above the adjustment groove.

[0008] As a further embodiment of this utility model: the engaging screw is rotatably connected to the engaging thread, and the return spring is fixedly connected to the support sleeve and the spring washer.

[0009] As a further improvement of this utility model, the inner diameter of the through hole in the bent rod is longer than the outer diameter of the fastening bent rod.

[0010] As a further improvement of this utility model, a keyway is pre-formed inside the cutting plate on the outside of the fixture body.

[0011] As a further improvement of this utility model: the supporting pole is slidably connected to the adjusting groove, and the supporting sleeve is fixedly connected to the bottom storage compartment.

[0012] As a further improvement of this utility model, the outer diameter of the support pad ring is greater than the inner diameter of the keyway.

[0013] Compared with the prior art, the beneficial effects of this utility model are: The control applies torque to the entire meshing screw and moves the meshing thread towards the inside of the support sleeve. As the meshing screw continues to move downward, it squeezes multiple fastening bent rods from inside the support sleeve through the bent rod perforations to contact and squeeze the inner wall of the keyway of the cutting plate. Therefore, it is possible to adjust the center position of the keyway and the center position of the support sleeve to coincide with each other, which can ensure the accuracy of the gear size during cutting and can be supported to prevent it from falling after processing.

[0014] Multiple support rods are adjusted as a whole inside the adjustment groove. After the cut sheet material is fitted onto the outside of the support sleeve, the excess material will be supported by the support rods after processing, and the gear will be limited and supported on the outside of the fixture body. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a helical gear electrical discharge machining fixture; Figure 2 This is a schematic diagram of the main body of a helical gear electrical discharge machining fixture. Figure 3 This is a schematic diagram of the internal structure of a support sleeve in a helical gear EDM fixture. Figure 4 This is a cross-sectional view of the entire device in a helical gear electrical discharge machining fixture; Figure 5 This is a side view of the overall device in a helical gear EDM fixture.

[0016] In the diagram: 1. Fixture body; 2. Bottom storage compartment; 3. Cutting board; 4. Adjustment groove; 5. Supporting upright; 101. Support sleeve; 102. Engaging screw; 103. Angled end; 104. Support washer ring; 105. Engaging thread; 106. Bent rod through hole; 107. Fastening bent rod; 108. Return spring; 109. Spring washer plate. Detailed Implementation

[0017] 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.

[0018] like Figure 1-5 As shown, this embodiment provides a helical gear EDM fixture, including a fixture body 1. The fixture body 1 includes a support sleeve 101 and a meshing screw 102. A meshing thread 105 is provided on the inner side of the upper end of the support sleeve 101. The meshing screw 102 is meshed and rotatably connected with the meshing thread 105. A beveled end 103 is provided on the lower end of the meshing screw 102. A support washer ring 104 is installed on the outer side of the support sleeve 101. The upper part of the support washer ring 104 is located at... The outer side of the support sleeve 101 has a ring array of bent rod through holes 106. A fastening bent rod 107 is installed inside the bent rod through hole 106. The inner diameter of the bent rod through hole 106 is longer than the outer diameter of the fastening bent rod 107. A spring washer 109 is installed on the outer side of the fastening bent rod 107. A return spring 108 is connected between the spring washer 109 and the support sleeve 101. The return spring 108 is fixedly connected to both the support sleeve 101 and the spring washer 109.

[0019] like Figure 2-3 As shown, in this embodiment, a cutting plate 3 is provided on the outer side of the fixture body 1. A keyway is pre-opened inside the cutting plate 3 on the outer side of the fixture body 1. The outer diameter of the support pad ring 104 is longer than the inner diameter of the keyway. A bottom storage compartment 2 is installed at the lower end of the fixture body 1. An adjustment groove 4 is arrayed on the upper surface of the bottom storage compartment 2. A support rod 5 is installed above the adjustment groove 4. The support rod 5 is slidably connected to the adjustment groove 4. The support sleeve 101 is fixedly connected to the bottom storage compartment 2.

[0020] The working principle of this utility model is as follows: Before processing, a keyway is formed by cutting the center of the cut plate 3. Based on the outer diameter of the cut plate 3 and the outer diameter of the gear to be processed, multiple support rods 5 are adjusted as a whole within the adjusting groove 4. The cut plate 3 is then fitted over the keyway onto the outside of the support sleeve 101. The support pad ring 104 on the outside of the support sleeve 101 provides support for the cut plate 3. Simultaneously, the support rods 5 support the side ends of the cut plate 3. The engagement screw 102 is inserted from above the support sleeve 101 into the engagement thread 105. By controlling the application of torque to the engagement screw 102 and the engagement thread 105, the screw moves inward into the support sleeve 101. The inclined end 103 will contact the inner side of multiple fastening bent rods 107. When the engaging screw 102 continues to move downward, it will squeeze the multiple fastening bent rods 107 from the inside of the support sleeve 101 through the bent rod through hole 106 and move outward. The spring pad 109 on the outside of the fastening bent rod 107 will compress and deform the return spring 108. At the same time, the fastening bent rod 107 and the inner wall of the keyway inside the cutting plate 3 will contact and compress. Therefore, the center position of the keyway and the center position of the support sleeve 101 can be adjusted to coincide with each other, which can ensure the accuracy of the gear size during cutting. Therefore, the electrode of the electric spark is used to etch the entire material above the cutting plate 3. After the etching is completed, the gear is limited to the outside of the support sleeve 101, and the excess space is supported by the support rod 5.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A helical gear electrical discharge machining fixture, comprising a fixture body (1), characterized in that, The fixture body (1) includes: a support sleeve (101) and a meshing screw (102). The upper end of the support sleeve (101) is provided with a meshing thread (105), and the lower end of the meshing screw (102) is provided with a beveled end (103). A support washer ring (104) is installed on the outer side of the support sleeve (101). A bent rod through hole (106) is provided in an annular array above the support washer ring (104) on the outer side of the support sleeve (101). A fastening bent rod (107) is provided inside the bent rod through hole (106). A spring washer plate (109) is installed on the outer side of the fastening bent rod (107). A return spring (108) is connected between the spring washer plate (109) and the support sleeve (101).

2. The helical gear EDM fixture according to claim 1, characterized in that, The outer side of the fixture body (1) is provided with a cutting board (3).

3. The helical gear EDM fixture according to claim 1, characterized in that, The lower end of the fixture body (1) is equipped with a bottom storage compartment (2), and the upper surface of the bottom storage compartment (2) is provided with an array of adjustment grooves (4). A support rod (5) is installed above the adjustment grooves (4).

4. The helical gear EDM fixture according to claim 1, characterized in that, The engagement screw (102) is rotatably connected to the engagement thread (105), and the return spring (108) is fixedly connected to the support sleeve (101) and the spring washer (109).

5. The helical gear EDM fixture according to claim 1, characterized in that, The inner diameter of the through hole (106) of the bent rod is longer than the outer diameter of the fastening bent rod (107).

6. A helical gear EDM fixture according to claim 2, characterized in that, The cut plate (3) has a keyway pre-cut inside on the outside of the fixture body (1).

7. The helical gear electric discharge machining jig according to claim 3, wherein The support pole (5) is slidably connected to the adjustment groove (4), and the support sleeve (101) is fixedly connected to the bottom storage compartment (2).

8. The helical gear electric discharge machining jig according to claim 6, wherein The outer diameter of the support pad ring (104) is greater than the inner diameter of the keyway.

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