A wire sawing method

Abstract

This invention relates to the field of machining technology and provides a wire EDM method for keyway wire EDM of cylindrical molds, comprising the following steps: S1, using the cylindrical mold as a reference, fabricating a rubber washer; S2, placing the washer obtained in step S1 between two cylindrical molds, using the whole as the workpiece to be cut; S3, placing the workpiece to be cut obtained in step S2 on the clamp of the wire EDM machine, and starting the coolant supply device of the wire EDM machine after clamping; S4, starting the wire cutting wire of the wire EDM machine to process the keyway of the workpiece to be cut; The wire EDM method provided by this invention can increase the clamping height at one time, greatly improve production efficiency, greatly save manufacturing costs, achieve a 100% overall pass rate, and the finished product processed by this method meets the key dimension control requirements proposed by the process.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and more specifically, to a wire EDM machining method. Background Technology

[0002] To meet usage requirements, various complex and irregularly shaped products need to be processed using wire electrical discharge machining (EDM). To meet the equipment's operational and production process requirements, it is necessary to machine the outer circular keyway of the mold product, made of a difficult-to-machine alloy. In actual production, to improve machining efficiency, the clamping height can be increased, and machining parameters can be adjusted to increase the machining current. However, increasing the clamping height makes it difficult for coolant to enter the intermediate cutting area, reducing the cooling effect of the electrode wire and increasing the likelihood of wire breakage due to difficulty in chip removal.

[0003] To reduce wire breakage during wire EDM and ensure effective cooling, conventional wire EDM processes cannot use excessively high clamping heights, resulting in low processing efficiency and very high processing costs. Summary of the Invention

[0004] This invention provides a wire EDM method that can effectively solve the above-mentioned problems.

[0005] The embodiments of the present invention are achieved through the following technical solutions:

[0006] A wire EDM machining method for machining keyways in a cylindrical mold includes the following steps:

[0007] S1. Using a cylindrical mold as a reference, manufacture a washer made of rubber.

[0008] S2. Place the washer obtained in step S1 between two cylindrical molds, and use the whole as a part to be cut.

[0009] S3. Place the workpiece to be cut obtained in step S2 on the clamp of the wire EDM machine, and start the coolant supply device of the wire EDM machine after clamping it.

[0010] S4. Start the wire cutting wire of the wire cutting machine to process the keyway of the workpiece to be cut.

[0011] Furthermore, in step S1, the washer is annular in shape and has a notch.

[0012] The purpose of the washer being circular is to match the shape of the cylindrical mold to be processed, and the purpose of the notch is to leave space for the processing area.

[0013] Furthermore, the outer diameter of the washer is smaller than the outer diameter of the cylindrical mold, and the inner diameter of the washer is larger than the inner diameter of the cylindrical mold.

[0014] Furthermore, the outer diameter of the washer is 1 mm smaller than the outer diameter of the cylindrical mold, and the inner diameter of the washer is 1 mm larger than the inner diameter of the cylindrical mold.

[0015] This design ensures that when the washer is placed between the two cylindrical molds, no excess portion will be exposed, thus affecting the wire cutting effect.

[0016] Furthermore, the width of the notch on the washer is greater than the width of the keyway to be machined on the workpiece to be cut.

[0017] Furthermore, the width of the notch on the washer is 2mm-4mm larger than the width of the keyway to be machined on the workpiece to be cut.

[0018] This design facilitates the cutting and processing of keyways on the workpiece.

[0019] Furthermore, a plurality of first wedge blocks are arranged in a circular array on one side of the gasket, and a plurality of second wedge blocks are arranged in a circular array on the other side of the gasket. Both the first wedge blocks and the second wedge blocks are made of rubber.

[0020] The function of the first and second wedge blocks is to provide oblique extrusion force, that is, to increase the friction between the cylindrical mold and the washer, effectively preventing relative displacement between the two cylindrical molds.

[0021] Furthermore, the first wedge block and the second wedge block are oriented in opposite directions.

[0022] Its purpose is to further improve the stability between the two cylindrical molds.

[0023] Furthermore, both the first and second wedge blocks are hollow.

[0024] The hollow structure allows for greater deformation of the wedge block, which increases the contact area between the washer surface and the cylindrical mold surface, thereby increasing friction and effectively ensuring the stability between the two cylindrical molds.

[0025] Furthermore, a first vent hole is provided on the surface of the first wedge block, and a second vent hole is provided on the surface of the second wedge block.

[0026] With this configuration, when the cylindrical mold squeezes the washer, the gas inside the hollow wedge block is discharged. When the cylindrical mold and the washer are completely in contact, the vent hole on the wedge block is blocked. At this time, the internal space of the wedge block applies a suction force to the cylindrical mold through the vent hole, making it difficult for the cylindrical mold and the washer to shift relative to each other.

[0027] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0028] The wire EDM processing method provided by this invention can increase the clamping height, greatly improve production efficiency, significantly save manufacturing costs, achieve a 100% overall pass rate, and ensure that the finished products processed by this method meet the key dimensional control requirements of the process. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the washer provided in Example 1;

[0031] Figure 2 This is a schematic diagram of the structure of the part to be cut provided in Example 1;

[0032] Figure 3 This is a schematic diagram of the gasket provided in Example 2.

[0033] Icons: 1-Washer, 11-Notch, 12-First wedge, 121-First vent, 13-Second wedge, 2-Cylindrical mold, 21-Keyway. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Example 1

[0036] This embodiment provides a wire EDM machining method for keyway wire EDM machining of a cylindrical mold, including the following steps:

[0037] S1. Using a cylindrical mold as a reference, manufacture a washer made of rubber.

[0038] S2. Place the washer obtained in step S1 between two cylindrical molds, and use the whole as a part to be cut.

[0039] S3. Place the workpiece to be cut obtained in step S2 on the clamp of the wire EDM machine, and start the coolant supply device of the wire EDM machine after clamping it.

[0040] S4. Start the wire cutting wire of the wire cutting machine to process the keyway of the workpiece to be cut.

[0041] Among them, such as Figure 1-2 As shown, the manufactured washer 1 is in the shape of a ring and has a height of 3mm. A notch 11 is provided on the washer 1. The width of the notch 11 is 4mm larger than the width of the keyway 21 to be processed in the workpiece to be cut. The workpiece to be cut is composed of two cylindrical molds 2 stacked on top of each other. The height of the cylindrical molds 2 is 40mm. The washer 1 is placed between the two cylindrical molds 2. The outer diameter of the washer 1 is 1mm smaller than the outer diameter of the cylindrical mold 2, and the inner diameter of the washer 1 is 1mm larger than the inner diameter of the cylindrical mold 2.

[0042] Example 2

[0043] like Figure 3 As shown, this embodiment is an improvement on embodiment 1, specifically in that:

[0044] The remaining features are the same as in Embodiment 1, except that a plurality of first wedge blocks 12 are arranged in a circular array on one side of the gasket 1, and a plurality of second wedge blocks 13 are arranged in a circular array on the other side of the gasket 1. The first wedge blocks 12 and the second wedge blocks 13 are both made of rubber. The first wedge blocks 12 and the second wedge blocks 13 face opposite directions. The first wedge blocks 12 and the second wedge blocks 13 are hollow. A first vent hole 121 is provided on the surface of the first wedge block 12, and a second vent hole (obscured in the figure, not shown) is provided on the surface of the second wedge block 13.

[0045] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A wire sawing method for key groove wire sawing of a cylindrical mold, characterized by, The method comprises the following steps: S1, making a gasket with rubber as the material based on a cylindrical mold; S2, placing the gasket made in step S1 between two cylindrical molds as a whole to be cut; S3, placing the to-be-cut piece obtained in step S2 on the clamp of a wire cutting machine, clamping it, and then starting the cooling liquid supply device of the wire cutting machine; S4, starting the wire cutting wire of the wire cutting machine to process the keyway of the to-be-cut piece; Wherein, a plurality of first wedge-shaped blocks are arranged in a ring array on one side surface of the gasket, a plurality of second wedge-shaped blocks are arranged in a ring array on the other side surface of the gasket, the materials of the first wedge-shaped blocks and the second wedge-shaped blocks are both rubber, the orientations of the first wedge-shaped blocks and the second wedge-shaped blocks are opposite, the first wedge-shaped blocks are hollow, the second wedge-shaped blocks are hollow, first air holes are arranged on the surfaces of the first wedge-shaped blocks, and second air holes are arranged on the surfaces of the second wedge-shaped blocks.

2. The wire sawing process of claim 1, wherein, In step S1, the gasket is in the shape of a ring, and a notch is formed on the gasket.

3. The wire sawing process of claim 2, wherein, The outer circle diameter of the gasket is smaller than the outer circle diameter of the cylindrical mold, and the inner circle diameter of the gasket is larger than the inner circle diameter of the cylindrical mold.

4. The wire sawing process of claim 3, wherein, The outer circle diameter of the gasket is 1mm smaller than the outer circle diameter of the cylindrical mold, and the inner circle diameter of the gasket is 1mm larger than the inner circle diameter of the cylindrical mold.

5. The wire sawing process of claim 2, wherein, The width of the notch on the gasket is larger than the width of the keyway to be processed of the to-be-cut piece.

6. The wire sawing process of claim 5, wherein, The width of the notch on the gasket is 2mm-4mm larger than the width of the keyway to be processed of the to-be-cut piece.

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