Machining method of thin-wall ring

Abstract

In order to achieve the purpose, the invention provides the following technical scheme that the machining method of the thin-wall ring comprises the following steps: (1) roughly machining an inner hole and a step excircle of a body; the oil pressure of the three-jaw chuck is 6-8 kg, and the temperature of the cooling liquid is kept constant; (2) an inner hole of the body and a step outer circle are subjected to finish machining; the oil pressure of the three-jaw chuck is 2-4 kilograms, and the temperature of the cooling liquid is kept constant; (3) processing a key groove; the oil pressure of the three-jaw chuck is 2-4 kg, and the temperature of the cooling liquid is constant; according to the machining method of the thin-wall ring, when an inner circle and a step outer circle are machined, the pressure of oil pressure is automatically adjusted through a program, the clamping oil pressure of a three-jaw chuck is high during rough machining, the clamping oil pressure of the three-jaw chuck is adjusted to be low during finish machining, and meanwhile the temperature of cooling liquid in the whole process is constant; products produced in this way can meet the design requirements of the products. The method can also be used for large-scale industrial production.

Description

Technical Field

[0001] This invention belongs to the technical field of thin-walled ring processing methods, specifically relating to a processing method for thin-walled rings that is easy for large-scale industrial production. Background Technology

[0002] During machining, some special situations may arise, such as when machining large, thin-walled ring-shaped products, it is difficult to achieve the design requirements for concentricity of the machined parts; as shown in the attached... Figure 1 As shown, the outer diameter of the large-sized thin-walled ring product is 470 mm, the thickness is 5 mm, and the concentricity of the inner and outer circles is designed to be 0.02 mm. After testing, Test 1 (1) Rough machining of the inner hole and the outer circle of the stepped body 101; clamped with a conventional three-jaw chuck, the hydraulic pressure of the three-jaw chuck is 2 kg, and the coolant is at room temperature; (2) Finish machining of the inner hole and the outer circle of the stepped body 101; clamped with a conventional three-jaw chuck, the hydraulic pressure of the three-jaw chuck is 2 kg, and the coolant is at room temperature; (3) Machining of the keyway 102; using a conventional three-jaw chuck with a hydraulic pressure of 4 kg, and the coolant is at room temperature; The test showed that the concentricity of the inner and outer circles was 0.0327, which did not meet the design requirements of the product; Test 2 (1) Rough machining of the inner hole and the outer circle of the step of the body 101; clamped with a conventional three-jaw chuck, the hydraulic pressure of the three-jaw chuck was 6 kg, and the coolant was at room temperature; (2) Finish machining of the inner hole and the outer circle of the step of the body 101; clamped with a conventional three-jaw chuck, the hydraulic pressure of the three-jaw chuck was 6 kg, and the coolant was at room temperature; (3) Machining of the keyway 102; the hydraulic pressure of the three-jaw chuck was 6 kg, and the coolant was at room temperature; After testing, the concentricity of the inner and outer circles was 0.0293, which did not meet the design requirements of the product.

[0003] To this end, we have developed a processing method for thin-walled rings that is easy to mass-produce industrially. Summary of the Invention

[0004] The purpose of this invention is to provide a processing method for thin-walled rings that is easy to mass-produce industrially.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for processing a thin-walled ring, comprising the following steps: (1) Roughly machine the inner hole and outer circle of the step of the body; clamp it with a machining fixture, the hydraulic pressure of the machining fixture is 6-8 kg, and the coolant is kept at a constant temperature; (2) Finish the inner hole and outer circle of the step of the body; clamp it with a machining fixture, the hydraulic pressure of the machining fixture is 2-4 kg, and the coolant is kept at a constant temperature; (3) Machining keyway; the hydraulic pressure of the machining fixture is 2-4 kg, and the coolant is kept at a constant temperature.

[0006] Preferably, the processing method of the thin-walled ring includes the following steps: (1) Roughly machine the inner hole and outer circle of the step of the body; clamp it with a machining fixture, the hydraulic pressure of the machining fixture is 7 kg, and the coolant is kept at a constant temperature; (2) Finish the inner hole and outer circle of the step of the body; clamp it with a machining fixture, the hydraulic pressure of the machining fixture is 4 kg, and the coolant is kept at a constant temperature; (3) Machining keyway; the hydraulic pressure of the machining fixture is 4 kg, and the coolant is kept at a constant temperature.

[0007] Preferably, the processing method of the thin-walled ring includes the following steps: (1) Roughly machine the inner hole and the outer circle of the step of the body; clamp it with a machining fixture, the hydraulic pressure of the machining fixture is 6 kg, and the coolant is kept at a constant temperature; (2) Finish the inner hole and outer circle of the step of the body; clamp it with a machining fixture, the hydraulic pressure of the machining fixture is 2 kg, and the coolant is kept at a constant temperature; (3) Machining keyway; the hydraulic pressure of the machining fixture is 2 kg, and the coolant is kept at a constant temperature.

[0008] Preferably, the processing fixture includes three movable jaws. Moving any one of the movable jaws will cause all three movable jaws to move synchronously inward or outward. The fixture is characterized in that: each movable jaw has two clamping blocks correspondingly arranged on its clamping part; the curvature of the clamping blocks is concentrically arranged with the curvature of the clamping part of the movable jaw; when any one of the movable jaws is moved, all three movable jaws will move synchronously inward or outward, and the clamping blocks will simultaneously clamp or release the large-sized thin-walled annular product.

[0009] Preferably, the arc of the moving claw is not less than one-fifth of that of the large-sized thin-walled annular product, and not greater than one-third of that of the large-sized thin-walled annular product.

[0010] Preferably, the planar portion of the movable claw is provided with a first fixing hole, which is used to connect with the three-jaw chuck body.

[0011] Preferably, the clamping portion of the moving claw has second fixing holes evenly distributed on it; the second fixing holes are used for connecting the moving claw to the clamping block.

[0012] Preferably, the clamping part of the moving claw is further provided with a third fixing hole; the third fixing hole is located between adjacent clamping blocks and is used to connect with the three-jaw chuck body.

[0013] Preferably, the width of the clamping block is wider than the clamping portion of the moving claw, and the clamping block extends inward toward the clamping portion of the moving claw.

[0014] Preferably, the arc length of the clamping block is less than half of the clamping portion of the moving claw.

[0015] Compared with the prior art, the present invention provides a method for processing thin-walled rings, which has the following beneficial effects: The thin-walled ring processing method of the present invention automatically adjusts the oil pressure through a program when processing the inner circle and the stepped outer circle. During roughing, the three-jaw chuck clamping oil pressure is high, and during finishing, the three-jaw chuck clamping oil pressure is lowered. At the same time, the coolant is kept at a constant temperature throughout the process. The products produced in this way can meet the design requirements of the product and can also be used for large-scale industrial production. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention, but do not constitute a limitation thereof. In the drawings: Figure 1 A cross-sectional view of a product manufactured using the thin-walled ring processing method proposed in this invention; Figure 2 This is a three-dimensional structural diagram of the moving jaw assembly of a machining fixture for thin-walled rings according to the present invention, showing its first angle. Figure 3 This is a three-dimensional structural diagram of the moving jaw assembly of a machining fixture for thin-walled rings according to the present invention, taken from a second angle. Figure 4 This is a three-dimensional structural diagram of the moving jaw assembly of a machining fixture for thin-walled rings proposed in this invention, taken from a third angle. Figure 5 This is a schematic diagram illustrating the working principle of the moving jaw assembly of a machining fixture for thin-walled rings proposed in this invention. In the figure: 101, body; 102, keyway; 1, moving claw; 2, clamping block; 11, first fixing hole; 12, second fixing hole; 21, third fixing hole. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Example

[0018] Please see Figure 1-5 This invention provides a technical solution: a method for processing a thin-walled ring, comprising the following steps: (1) Roughly machine the inner hole and the outer circle of the step of the body 101; clamp it with a machining fixture, the hydraulic pressure of the machining fixture is 7 kg, and the coolant is kept at a constant temperature; (2) Finish the inner hole and outer circle of the step of the body 101; clamp it with a machining fixture, the hydraulic pressure of the machining fixture is 4 kg, and the coolant is kept at a constant temperature; (3) Machining keyway 102; the hydraulic pressure of the machining fixture is 4 kg, and the coolant is kept at a constant temperature.

[0019] After testing, the concentricity of the inner and outer circles was 0.0178, which meets the product design requirements. After extensive testing, the concentricity of the inner and outer circles was 0.0170-0.0195, which also meets the product design requirements. It is currently in large-scale industrial production.

[0020] The processing fixture includes three movable jaws 1. Moving any one of the movable jaws 1 will cause all three movable jaws 1 to move inward or outward simultaneously. Each movable jaw 1 has two clamping blocks 2 correspondingly arranged on its clamping part (not shown). The curvature of the clamping block 2 is concentrically set with the curvature of the clamping part of the movable jaw 1. When any one of the movable jaws 1 is moved, all three movable jaws 1 will move inward or outward simultaneously, and the clamping blocks 2 will clamp or release the large-sized thin-walled ring product simultaneously.

[0021] In this example, the arc of the moving claw 1 is not less than one-fifth of that of the large-sized thin-walled annular product, and not greater than one-third of that of the large-sized thin-walled annular product.

[0022] In this example, the planar portion of the moving claw 1 is provided with a first fixing hole 11, which is used to connect with the three-jaw chuck body (not shown).

[0023] In this embodiment, the clamping part of the moving claw 1 is evenly distributed with second fixing holes 12; the second fixing holes 12 are used for connecting the moving claw and the clamping block 2.

[0024] In this embodiment, the clamping part of the moving claw 1 is also provided with a third fixing hole 21; the third fixing hole 21 is located between adjacent clamping blocks 2 and is used to connect with the three-jaw chuck body (not shown).

[0025] In this embodiment, the width of the clamping block 2 is wider than the clamping portion of the moving claw 1, and the clamping block 2 extends into the clamping portion of the moving claw 1.

[0026] In this embodiment, the arc length of the clamping block 2 is less than half of the clamping part of the moving claw 1.

[0027] During operation, the three moving jaws 1 clamp the outer circumference of the large-sized thin-walled annular product with an arc of no less than three-fifths. At the same time, while ensuring the central clamping force F1 of the moving jaws 1, the clamping force F2 of the clamping block 2 is relatively reduced. The original three-jaw clamping is changed to six-jaw clamping, with more clamping points. During the processing, the deformation of the large-sized thin-walled annular product is relatively smaller, so the product design requirements can be met after processing. After testing, the processing fixture for thin-walled annular products described in this invention can clamp large-sized thin-walled annular products and the roundness can meet the design requirements. It is currently in large-scale industrial production practice. Example

[0028] Please see Figure 1-5 This invention provides a technical solution: a method for processing a thin-walled ring, comprising the following steps: (1) Roughly machine the inner hole and the outer circle of the step of the body 101; clamp it with a machining fixture, the hydraulic pressure of the machining fixture is 6 kg, and the coolant is kept at a constant temperature; (2) Finish the inner hole and outer circle of the step of the body 101; clamp it with a machining fixture, the hydraulic pressure of the machining fixture is 2 kg, and the coolant is kept at a constant temperature; (3) Machining keyway 102; the hydraulic pressure of the machining fixture is 2 kg, and the coolant is kept at a constant temperature.

[0029] After testing, the concentricity of the inner and outer circles was 0.0171, which meets the product design requirements. After further testing, the concentricity of the inner and outer circles was 0.0170-0.0195, which also meets the product design requirements. It is currently in large-scale industrial production.

[0030] The machining fixture in Embodiment 2 is the same as that in Embodiment 1, and will not be described again here.

[0031] Compared with the prior art, the present invention has the following beneficial effects: The thin-walled ring processing method of the present invention automatically adjusts the oil pressure through a program when processing the inner circle and the stepped outer circle. During roughing, the three-jaw chuck clamping oil pressure is high, and during finishing, the three-jaw chuck clamping oil pressure is lowered. At the same time, the coolant is kept at a constant temperature throughout the process. The products produced in this way can meet the design requirements of the product and can also be used for large-scale industrial production.

[0032] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method of machining a thin-walled ring, characterized by: It comprises the following steps: (1) Rough machining of the inner hole and the stepped outer circle of the body; clamping with a machining clamp, oil pressure of the machining clamp being 6-8 kg, constant temperature of the cooling liquid; (2) Fine machining of the inner hole and the stepped outer circle of the body; clamping with a machining clamp, oil pressure of the machining clamp being 2-4 kg, constant temperature of the cooling liquid; (3) Machining of the keyway; oil pressure of the machining clamp being 2-4 kg, constant temperature of the cooling liquid.

2. The method of machining a thin-walled ring of claim 1, wherein: It comprises the following steps: (1) Rough machining of the inner hole and the stepped outer circle of the body; clamping with a machining clamp, oil pressure of the machining clamp being 7 kg, constant temperature of the cooling liquid; (2) Fine machining of the inner hole and the stepped outer circle of the body; clamping with a machining clamp, oil pressure of the machining clamp being 4 kg, constant temperature of the cooling liquid; (3) Machining of the keyway; oil pressure of the machining clamp being 4 kg, constant temperature of the cooling liquid.

3. The method of machining a thin-walled ring of claim 1, wherein: It comprises the following steps: (1) Rough machining of the inner hole and the stepped outer circle of the body; clamping with a machining clamp, oil pressure of the machining clamp being 6 kg, constant temperature of the cooling liquid; (2) Fine machining of the inner hole and the stepped outer circle of the body; clamping with a machining clamp, oil pressure of the machining clamp being 2 kg, constant temperature of the cooling liquid; (3) Machining of the keyway; oil pressure of the machining clamp being 2 kg, constant temperature of the cooling liquid.

4. The method of machining a thin-walled ring of claim 1, wherein: The machining clamp comprises three moving claws, and when any one of the moving claws is moved, the three moving claws will move synchronously inward or outward, characterized in that: two clamping blocks are correspondingly arranged on the clamping part of each moving claw; the curvature of the clamping block is concentrically arranged with the curvature of the clamping part of the moving claw; when any one of the moving claws is moved, the three moving claws will move synchronously inward or outward, and the clamping blocks will synchronously clamp or release the large-size thin-walled annular product.

5. The method of machining a thin-walled ring of claim 4, wherein: The curvature of the moving claw is not less than one-fifth of the large-size thin-walled annular product, and is not more than one-third of the large-size thin-walled annular product.

6. The method of machining a thin-walled ring of claim 4, wherein: A first fixing hole is arranged on the planar part of the moving claw, and the first fixing hole is used to connect with the three-claw chuck body.

7. The method of machining a thin-walled ring of claim 4, wherein: Second fixing holes are uniformly arranged on the clamping part of the moving claw, and the second fixing holes are used to connect the moving claw with the clamping block.

8. The method of machining a thin-walled ring of claim 4, wherein: Third fixing holes are further arranged on the clamping part of the moving claw, and the third fixing holes are located between adjacent clamping blocks and are used to connect with the three-claw chuck body.

9. The method of machining a thin-walled ring of claim 4, wherein: The width of the clamping block is greater than that of the clamping part of the moving claw, and the clamping block extends inwardly to the clamping part of the moving claw.

10. The method of machining a thin-walled ring of claim 4, wherein: The arc length of the clamping block is less than half of the clamping part of the moving claw.

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