Clamp for finish wire cutting machining of rotary valve part
By designing a compact and easy-to-load-and-unload fixture structure, the problems of high precision requirements and poor compatibility of clamping mandrels in the machining of rotary valve parts were solved, enabling efficient machining on ordinary precision wire cutting equipment and improving production efficiency and product quality.
Patent Information
- Application Number
- CN202423201883.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-24
AI Technical Summary
Traditional methods for machining rotary valve parts suffer from high precision requirements, poor compatibility with clamping mandrels, and high machining difficulty, leading to production bottlenecks and equipment limitations, especially since ordinary precision wire cutting equipment cannot process them.
The fixture structure is designed to be compact, easy to load and unload, and simple to switch, achieving precise positioning and clamping. It includes a clamping jig, tightening screws and washers, and is positioned through threaded holes and round bosses, making it suitable for ordinary precision wire cutting equipment.
This technology enables efficient machining of rotary valve parts on ordinary precision wire cutting equipment, improving machining accuracy and production efficiency while reducing labor intensity.
Smart Images
Figure CN223616910U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of precision wire cutting tooling fixtures, specifically to a fixture for precision wire cutting of rotary valve parts. Background Technology
[0002] The rotary valve assembly is a core component of RDDV's rotary direct drive valve. Machining its circumferential overlap is one of the core manufacturing technologies, requiring the precise matching of the overlap between the four sets of throttling orifices on the valve sleeve and the four sets of working edges on the auxiliary valve core. This involves high precision requirements, a complex structure, and significant machining challenges. Traditional machining methods utilize A-axis wire cutting equipment to process each set of throttling orifices, employing perforated mandrels to clamp the parts and using pin positioning to achieve precision machining of each angular throttling orifice. On one hand, due to the high precision requirements—needing alignment runout to be within 0.003mm—high demands are placed on the compatibility between the clamping mandrel and the parts, necessitating the manufacture of multiple clamping mandrels to accommodate different inner hole sizes. On the other hand, the angular relationship necessitates machining on A-axis wire cutting equipment, which can easily create production bottlenecks and fail to meet production demands. Utility Model Content
[0003] To address the shortcomings of existing processing methods, this utility model provides a fixture for precision wire cutting of rotary valves. This utility model has a compact structure, is easy to load and unload, and allows for simple and quick switching.
[0004] To achieve the above objectives, this utility model provides a fixture for precision wire cutting of rotary valve parts, comprising: a clamping jig and a tightening screw;
[0005] The clamping fixture is divided into a root and a main body; the root is connected to the machine tool; the main body is a cuboid; the top surface of the cuboid has a circular groove for accommodating the parts; there are two circular bosses at the bottom of the circular groove for positioning, and a threaded hole at the center of the bottom of the circular groove; the threaded hole and the tightening screw work together to tighten the parts placed in the circular groove.
[0006] The perpendicularity of adjacent sides of the cube is within 0.005 mm.
[0007] The round boss has a corresponding positional relationship with the three round holes on the bottom of the part, achieving precise positioning.
[0008] The height of the round boss shall not exceed the length of the round hole.
[0009] The fixture also includes: gaskets;
[0010] A washer is placed between the tightening screw and the part to prevent damage to the part.
[0011] The depth of the circular groove ensures that the machined surface of the part is exposed outside the groove; the diameter of the circular groove is within 0.01mm larger than the outer diameter of the part.
[0012] The beneficial effects of this invention are:
[0013] This utility model provides a fixture for precision wire cutting of rotary valves. It has a compact structure, is easy to load and unload, and is simple and quick to switch. It can achieve accurate positioning, firm clamping, reliable quality, and low labor intensity during the processing. In particular, it can process rotary valves on ordinary precision wire cutting equipment, which can effectively alleviate the production pressure of high-value equipment. Attached Figure Description
[0014] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.
[0015] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.
[0016] Figure 1 This is a schematic diagram of the structure of this utility model.
[0017] Figure 2 This is a top view of the structure of this utility model.
[0018] Figure 3 This is a BB-side sectional view of the structure of this utility model.
[0019] Figure 4 This is a cross-sectional view of the structure of this utility model from the CC plane.
[0020] Figure 5 This is an assembly drawing of the present utility model and typical parts.
[0021] Figure 6 This is a cross-sectional view of the present invention and typical parts assembled together.
[0022] Figure 7 This is a top view of the present invention and typical parts assembled together. Detailed Implementation
[0023] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0024] To better implement this utility model, the following description is provided in conjunction with the appendix to the specification. Figure 1-7 This utility model will be described in detail.
[0025] This utility model provides a fixture for precision wire cutting of rotary valve parts, such as... Figure 1-4 As shown, it includes: clamping jig 1, tightening screw 3, and washer 2;
[0026] The clamping fixture is divided into a root 101 and a main body 105; the root is connected to the machine tool; the main body is a cuboid; the top surface of the cuboid has a circular groove for accommodating the part; the bottom of the circular groove has a first circular boss 102 and a second circular boss 103 for positioning; there is a threaded hole 104 at the center of the bottom of the circular groove; the threaded hole and the tightening screw cooperate to tighten the part 4 placed in the circular groove.
[0027] The perpendicularity of adjacent sides of the cube is within 0.005 mm.
[0028] The round boss has a corresponding positional relationship with the three round holes on the bottom of the part, achieving precise positioning.
[0029] The height of the round boss shall not exceed the length of the round hole.
[0030] A washer is placed between the tightening screw and the part to prevent damage to the part.
[0031] The depth of the circular groove ensures that the machined surface of the part is exposed outside the groove; the diameter of the circular groove is within 0.01mm larger than the outer diameter of the part.
[0032] like Figure 5-7 As shown, the specific assembly process is as follows:
[0033] Place the bottom of the rotary valve part into the clamping fixture 1, with the bottom surface of the part completely in contact with the clamping fixture;
[0034] The bottom of the part has three round holes that mate with the first round boss 102 and the second round boss 103. Note: the round holes marked with the lines do not participate in the mating.
[0035] Place the gasket 2 into the tightening screw 3;
[0036] Screw the screw into the threaded hole 104 to fix the part to the clamping fixture 1.
[0037] This invention solves the problems of difficult alignment and mismatch of clamping mandrels in traditional pin-type methods, achieving accurate positioning, convenient switching, reliable quality, and low labor intensity during processing. In particular, it solves the problem that ordinary precision wire cutting equipment cannot process rotary valve sleeves, greatly improving product quality and production efficiency. The structure is simple and easy to implement, providing a clamping approach for other similar parts.
Claims
1. A fixture for precision wire cutting of rotary valve parts, characterized in that, include: Install the jig and tighten the screws; The clamping fixture is divided into a root and a main body; the root is connected to the machine tool; the main body is a cuboid; the top surface of the cuboid has a circular groove for accommodating the parts; there are two circular bosses at the bottom of the circular groove for positioning, and a threaded hole at the center of the bottom of the circular groove; the threaded hole and the tightening screw work together to tighten the parts placed in the circular groove.
2. The clamp according to claim 1, characterized in that, The perpendicularity of adjacent sides of the cube is within 0.005 mm.
3. The clamp according to claim 2, characterized in that, The round boss has a corresponding positional relationship with the three round holes on the bottom of the part, achieving precise positioning.
4. The clamp according to claim 3, characterized in that, The height of the round boss shall not exceed the length of the round hole.
5. The clamp according to claim 1, characterized in that, The fixture also includes: gaskets; A washer is placed between the tightening screw and the part to prevent damage to the part.
6. The clamp according to claim 1, characterized in that, The depth of the circular groove ensures that the machined surface of the part is exposed outside the groove; the diameter of the circular groove is within 0.01mm larger than the outer diameter of the part.