Linear cutting clamp for high-precision small-wall-thickness part
By designing a high-precision wire EDM fixture for thin-walled parts and utilizing a combination of positioning core and pressure bar clamping structure, the problem of easy deformation of thin-walled parts during processing was solved, thereby improving processing accuracy and part yield.
Patent Information
- Application Number
- CN202423294840.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-31
AI Technical Summary
When machining high-precision, thin-walled parts, the lack of suitable wire EDM fixtures can cause the parts to deform during the machining process, affecting machining accuracy and yield.
A high-precision wire EDM fixture for thin-walled parts was designed. By setting first and second stepped circular holes on the fixture base, a positioning core and a pressure bar are installed. The bottom of the positioning core is inserted into the bottom cylinder of the part, and the n-shaped structure of the pressure bar clamps the inner and outer walls of the part. The fixture is detachably fixed in conjunction with the side pressure plate and screws.
This achieves effective clamping of parts, prevents deformation, and improves machining accuracy and yield.
Smart Images
Figure CN223642909U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machining fixture technology, specifically to a wire EDM fixture for high-precision small-wall-thickness parts. Background Technology
[0002] In processing such as Figure 1 The finished parts shown are usually made from cylindrical aluminum alloy components with small top diameter and large bottom diameter. These finished parts require high dimensional accuracy, but due to their thin walls and easy deformation during processing, the milled products all have a certain degree of deformation when processed by CNC milling. Therefore, wire EDM is considered for processing. The current problem is that there is a lack of fixtures that can be used to clamp the parts to meet the processing requirements. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a high-precision wire EDM fixture for small-wall-thickness parts, so as to solve the problem of the lack of fixtures for wire EDM when processing finished parts in the background art.
[0004] To solve the above problems, this utility model provides the following technical solution:
[0005] A high-precision wire EDM fixture for parts with small wall thickness; it includes a fixture base; a first stepped circular hole is formed on the top end face of the fixture base; the diameter of the first stepped circular hole is larger than the outer diameter of the part to be processed; a second stepped circular hole is formed on the bottom surface of the first stepped circular hole; a positioning core is installed at the second stepped circular hole; the bottom of the positioning core can be locked in the bottom cylinder of the part to be processed; a pressure strip is installed on the first stepped circular hole; the pressure strip is an inverted n-shaped structure above the positioning core; a gap is left between the inner side of the positioning core and the outer side of the pressure strip, and the part to be processed is clamped in the gap; the left and right end faces of the positioning core and the pressure strip are flush.
[0006] Preferably, the first stepped circular hole includes a circular groove, and a strip-shaped groove extending outward along one diameter of the circular groove is provided; an extension plate matching the size of the strip-shaped groove is provided at the lower part of the pressure strip; and a side pressure plate for restricting the movement of the pressure strip is provided on the top end face of the clamp seat near the strip-shaped groove.
[0007] Furthermore, through holes and threaded holes are respectively opened at corresponding positions on the top end faces of the side pressure plate and the fixture seat; the side pressure plate is detachably mounted on the fixture seat by clamping screws.
[0008] Preferably, an eccentric pin hole and a positioning through hole are formed on the bottom surface of the second-step circular hole; an eccentric pin hole and a positioning thread blind hole are also formed on the bottom surface of the positioning core; the second-step circular hole, the first-step circular hole, the positioning through hole and the positioning thread blind hole are coaxial; the positioning core is detachably installed at the second-step circular hole by means of a positioning pin and a fastening screw.
[0009] Preferably, the pressure strip includes a top strip-shaped plate with a uniform thickness at all points; an isosceles truncated cone, smaller at the top and larger at the bottom, is provided on the lower part of both ends of the strip-shaped plate; the opposite end faces of the two isosceles truncated cones are partially cylindrical structures corresponding to the outer periphery of the formed part; the positioning core includes a top strip-shaped step plate with a uniform thickness at all points; an isosceles truncated cone, smaller at the top and larger at the bottom, is provided on the lower side of the strip-shaped step plate; the two opposite end faces of the isosceles truncated cone are partially cylindrical structures corresponding to the inner periphery of the formed part; the left and right end faces of the strip-shaped plate and the strip-shaped step plate on the positioning core and the pressure strip are flush, and the front and rear end faces of the corresponding isosceles truncated cones are also flush.
[0010] Preferably, the fixture base is provided with two sets of first-step circular holes, second-step circular holes, positioning cores and pressure strip structures.
[0011] The beneficial effects of this utility model are:
[0012] This embodiment designs a fixture to meet the part processing requirements in the background art. It can clamp two parts at a time for processing. The clamping bar and positioning core effectively clamp the inner and outer walls of the parts to prevent them from deforming outward. The clamping bar is inserted into the first step circular hole of the fixture seat along with the parts to be processed to prevent it from exceeding the part's tolerance. The fixture in this embodiment produces parts with a high yield rate, thus effectively solving the problem that previous processing methods easily caused parts to deform and become scrap. Attached Figure Description
[0013] Figure 1 This is a three-dimensional structural schematic diagram of the shaped part to be processed in this embodiment;
[0014] Figure 2 This is a three-dimensional structural schematic diagram of the present invention in an embodiment;
[0015] Figure 3 yes Figure 2 A three-dimensional structural diagram of the device after the molded parts have been removed;
[0016] Figure 4 yes Figure 3 A three-dimensional structural diagram of the device after the positioning core at the second step circular hole on the front side has been removed;
[0017] Figure 5 yes Figure 2 Top view;
[0018] Figure 6 yes Figure 5 Sectional view along line AA;
[0019] Figure 7 This is a three-dimensional structural diagram of the pressure strip, side pressure plate and clamping screw in the connected state in this embodiment;
[0020] Explanation of reference numerals in the attached drawings: 1. Fixture base; 2. Positioning core; 3. Pressure bar; 4. Forming part; 5. Clamping screw; 6. Side pressure plate; 7. Fastening screw; 8. Positioning pin; 9. First step round hole; 10. Second step round hole. Detailed Implementation
[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:
[0022] Example:
[0023] Reference Figure 1 This embodiment provides a high-precision wire EDM fixture for parts with small wall thickness. It includes a fixture base 1; a first stepped circular hole 9 is formed on the top end face of the fixture base 1; the diameter of the first stepped circular hole 9 is larger than the outer diameter of the part to be processed; a second stepped circular hole 10 is formed on the bottom surface of the first stepped circular hole 9; a positioning core 2 is installed at the second stepped circular hole 10; the bottom of the positioning core 2 can be locked into the bottom cylinder of the part to be processed; a pressure strip 3 is installed on the first stepped circular hole 9; the pressure strip 3 is an inverted n-shaped structure above the positioning core 2; a gap is left between the inner side of the positioning core 2 and the outer side of the pressure strip 3, and the part to be processed is clamped in this gap; the left and right end faces of the positioning core 2 and the pressure strip 3 are flush with the left and right end faces of the formed part 4. In this embodiment, the shape of the pressure strip is smaller than the part to be wire-cut, ensuring that the wire cut does not touch it.
[0024] The first step circular hole 9 includes a circular groove, and a strip-shaped groove extending outward along one diameter of the circular groove; an extension plate matching the size of the strip-shaped groove is provided at the lower part of the pressure strip 3; a side pressure plate 6 for restricting the movement of the pressure strip 3 is provided on the top end face of the clamp seat 1 near the strip-shaped groove.
[0025] Through holes and threaded holes are respectively opened at corresponding positions on the top end faces of the side pressure plate 6 and the clamp seat 1; the side pressure plate 6 is detachably installed on the clamp seat 1 by means of clamping screws 5.
[0026] An eccentric pin hole and a positioning through hole are opened on the bottom surface of the second-step circular hole 10; an eccentric pin hole and a positioning thread blind hole are also opened on the bottom surface of the positioning core 2; the second-step circular hole 10, the first-step circular hole 9, the positioning through hole and the positioning thread blind hole are coaxial; the positioning core 2 is detachably installed at the second-step circular hole 10 by the positioning pin 8 and the fastening screw 7.
[0027] The pressure strip 3 includes a top strip-shaped plate with a uniform thickness at all points. An isosceles truncated cone, smaller at the top and larger at the bottom, is provided on the lower part of both ends of the strip-shaped plate. The opposing end faces of the two isosceles truncated cones are partially cylindrical structures corresponding to the outer periphery of the forming part 4. The positioning core 2 includes a top strip-shaped step plate with a uniform thickness at all points. An isosceles truncated cone, smaller at the top and larger at the bottom, is provided on the lower side of the strip-shaped step plate. The two opposing end faces of the isosceles truncated cone are partially cylindrical structures corresponding to the inner periphery of the forming part 4. The left and right end faces of the strip-shaped plate and the strip-shaped step plate on the positioning core 2 and the pressure strip 3 are flush, and the front and rear end faces of the corresponding isosceles truncated cones are also flush.
[0028] The fixture base 1 is provided with two sets of first-step circular holes 9, second-step circular holes 10, positioning core 2 and pressure strip 3.
[0029] When using the utility model device in this embodiment, it is only necessary to first install the positioning core, place the part to be processed on the positioning core, install the pressure strip on the first step circular hole, and press the pressure strip with the side pressure plate. Then, wire cutting can be performed on it.
Claims
1. A wire EDM fixture for high-precision parts with small wall thickness, characterized in that: It includes a fixture base (1); a first stepped circular hole (9) is opened on the top end face of the fixture base (1); the diameter of the first stepped circular hole (9) is larger than the outer diameter of the part to be processed; a second stepped circular hole (10) is opened on the bottom surface of the first stepped circular hole (9); a positioning core (2) is installed at the second stepped circular hole (10); the bottom of the positioning core (2) can be locked in the bottom cylinder of the part to be processed; a pressure strip (3) is installed on the first stepped circular hole (9); the pressure strip (3) is an inverted n-shaped structure above the positioning core (2); a gap is left between the inner side of the positioning core (2) and the outer side of the pressure strip (3), and the part to be processed is clamped in the gap position; the left and right end faces of the positioning core (2) and the pressure strip (3) are flush.
2. The wire EDM fixture for high-precision small-wall-thickness parts according to claim 1, characterized in that: The first step circular hole (9) includes a circular groove, and a strip groove extending outward along one diameter of the circular groove; an extension plate matching the size of the strip groove is provided at the lower part of the pressure strip (3); a side pressure plate (6) for restricting the movement of the pressure strip (3) is provided on the top end face of the clamp seat (1) near the strip groove.
3. The wire EDM fixture for high-precision small-wall-thickness parts according to claim 2, characterized in that: Through holes and threaded holes are respectively opened at corresponding positions on the top end face of the side pressure plate (6) and the fixture seat (1); the side pressure plate (6) is detachably installed on the fixture seat (1) by clamping screws (5).
4. The wire EDM fixture for high-precision small-wall-thickness parts according to claim 1, characterized in that: An eccentric pin hole and a positioning through hole are opened on the bottom surface of the second-step circular hole (10); an eccentric pin hole and a positioning thread blind hole are also opened on the bottom surface of the positioning core (2); the second-step circular hole (10), the first-step circular hole (9), the positioning through hole and the positioning thread blind hole are coaxial; the positioning core (2) is detachably installed at the second-step circular hole (10) by means of a positioning pin (8) and a fastening screw (7).
5. The wire EDM fixture for high-precision small-wall-thickness parts according to claim 1, characterized in that: The pressure strip (3) includes a top strip plate with a uniform thickness at all points; an isosceles platform with a smaller upper section and a larger lower section is provided on the lower part of both ends of the strip plate; the opposite end faces of the two isosceles platforms are partial cylindrical structures corresponding to the outer periphery of the forming part (4); the positioning core (2) includes a top strip step plate with a uniform thickness at all points; an isosceles platform with a smaller upper section and a larger lower section is provided on the lower side of the strip step plate; the two opposite end faces of the isosceles platform are partial cylindrical structures corresponding to the inner periphery of the forming part (4); the left and right end faces of the strip plate and the strip step plate on the positioning core (2) and the pressure strip (3) are flush with each other, and the left and right end faces of the corresponding isosceles platforms are also flush with each other.
6. The wire EDM fixture for high-precision small-wall-thickness parts according to claim 1, characterized in that: The fixture base (1) is provided with two sets of first step round holes (9), second step round holes (10), positioning core (2) and pressure strip (3) structure.