Expansion core clamp
Through the design of the core expansion fixture, the replacement core expansion connector and core expansion components are used to achieve high-precision clamping and multiple use of the parts to be processed in mechanical cutting processing, solving the shortcomings in machining accuracy and production efficiency of the existing fixtures and reducing costs.
Patent Information
- Application Number
- CN202421813091.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-30
AI Technical Summary
In mechanical cutting, existing mandrels are not suitable for mass production due to the uncertainty of clearance fit, which leads to low processing accuracy, high manufacturing difficulty, high installation technical requirements, low production efficiency and high cost.
The core expansion fixture is used to realize the multiple use of the fixture by replacing the core expansion connector and core expansion parts of different specifications. When the expansion core member is installed, the expansion wing shrinks, clamps the part to be processed, and clamps are expanded through the self-positioning of the expansion wing to improve machining accuracy.
The processing quality of the parts to be processed is improved, labor intensity is reduced, production efficiency is improved, and the manufacturing cost is reduced because the fixture can be reused.
Smart Images
Figure CN222957542U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of machining, in particular to an expansion core fixture. Background Art
[0002] In the machinery manufacturing industry, the inner hole of a workpiece is often used as the positioning reference for mechanical cutting. For such mechanical cutting, a mandrel fixture must be used. The fit between the workpiece and the mandrel is a clearance fit, and the size of the clearance value directly affects the accuracy of mechanical cutting. When the fit clearance is small, the accuracy of the machined workpiece is high; otherwise, it is low. The manufacturing of this type of product is difficult, the installation technical requirements are high, the production efficiency is low, and the cost is high. It is not suitable as a fixture for mass production. Content of the Utility Model
[0003] In order to overcome the defects of the above-mentioned prior art, the purpose of the utility model is to provide an expansion core fixture for clamping during batch processing. One set of expansion core fixtures can be reused as long as different specifications of expansion core connectors are replaced and different expansion core parts are matched.
[0004] The utility model adopts the following technical solutions to achieve the purpose:
[0005] The expansion core fixture includes a handle, a fixed seat, an expansion core connector, a positioning connector, an expansion core part, and a mounting seat; the fixed seat is provided with a central mounting hole; the mounting seat is arranged in the central mounting hole of the fixed seat, and a spring mounting cavity is arranged in the mounting seat; a spring is arranged in the spring mounting cavity; one side of the expansion core connector is in contact with and fixedly installed on the mounting seat, and a positioning connector is sleeved on the outer cylindrical surface of the other side; a compression block is arranged in the inner hole of the outer cylindrical surface of the expansion core connector; one end of the expansion core part is large and the other end is small. An expansion core hole is arranged inside the small end, and expansion wings are arranged on the outer surface; the small end of the expansion core part is arranged in the central hole of the expansion core connector, and the screw end of the handle arranged in the mounting seat is threadedly connected to the expansion core hole.
[0006] Further, the mounting seat is further provided with a set of fixed connection holes, and the mounting seat is fixedly connected to the connection hole of the expansion core connector through bolts passing through the fixed connection holes.
[0007] Further, the expansion core connector is provided with an exhaust hole connected to the central hole of the expansion core connector.
[0008] Further, a first flange is arranged on one side of the fixed seat where the handle is installed; a second flange is arranged on the outer surface of the expansion core connector; the first flange and the second flange are fastened by bolts.
[0009] Further, a rotating seat is arranged in the center of the first flange; the screw of the handle passes through the rotating seat and the mounting seat and is threadedly connected to the expansion core hole.
[0010] In summary, the utility model has the following beneficial effects: Before the installation of the utility model, by installing the expansion core part in the expansion core fixture, the expansion wings are contracted in the expansion core connecting part. When using the expansion core part to expand and clamp a batch of workpieces to be processed, the workpiece to be processed is set at the large end of the expansion core part of the expansion core fixture of the present application, and then by rotating the handle, the screw of the handle pushes the expansion core part into the workpiece to be processed. After the expansion wings lose the effect of the expansion core connecting part, they expand, realizing self-positioning expansion clamping of the workpiece to be processed from the center to the outside, and then processing, improving the processing quality of the workpiece to be processed, reducing the labor intensity, and improving the production efficiency. One set of expansion core fixtures can be reused as long as different specifications of expansion core connecting parts are replaced to match different expansion core parts. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 is a schematic diagram of the overall structure of the utility model.
[0012] Figure 2 is a schematic cross-sectional structure diagram of the utility model taken along the line E-E.
[0013] Figure 3 is a schematic left view structure diagram of the utility model.
[0014] Figure 4 is a schematic structure diagram of the mounting seat of the utility model.
[0015] Figure 5 is a schematic structure diagram of the expansion core part of the utility model.
[0016] Figure 6 is a schematic structure diagram of the expansion core connecting part of the utility model.
[0017] Figure 7 is a schematic structure diagram of the positioning connecting part of the utility model.
[0018] Wherein: handle 1; fixed seat 2; expansion core connecting part 3; positioning connecting part 4; expansion core part 5; mounting seat 6; spring 7; first flange 8; second flange 9; rotating seat 10; compression block 31; exhaust hole 32; expansion core hole 51; expansion wing 52; fixed connection hole 61; spring installation cavity 62. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.
[0020] Such as Figures 1 to 7As shown in the figure, the expansion core fixture includes a handle 1, a fixed seat 2, an expansion core connecting piece 3, a positioning connecting piece 4, an expansion core piece 5, and a mounting seat 6. The fixed seat 2 is provided with a central mounting hole. The mounting seat 6 is arranged in the central mounting hole of the fixed seat 2, and a spring mounting cavity 62 is arranged in the mounting seat 6. A spring 7 is arranged in the spring mounting cavity 62. One side of the expansion core connecting piece 3 is in contact with and fixedly installed on the mounting seat 6, and a positioning connecting piece 4 is sleeved on the outer cylindrical surface of the other side. A compression block 31 is arranged in the inner hole of the outer cylindrical surface of the expansion core connecting piece 3. One end of the expansion core piece 5 is large and the other end is small. An expansion core hole 51 is arranged inside the small end, and expansion wings 52 are arranged on the outer surface. The small end of the expansion core piece 5 is arranged in the central hole of the expansion core connecting piece 3, and the screw end of the handle 1 arranged in the mounting seat 6 is threadedly connected to the expansion core hole 51. Before installation, by installing the expansion core piece 5 in the expansion core fixture, the expansion wings 52 are contracted in the expansion core connecting piece 3. When using the expansion core piece 5 to expand and clamp a batch of workpieces to be processed, the workpiece to be processed is arranged at the large-end side of the expansion core piece 5 of the expansion core fixture of the present application, and then by rotating the handle 1, the screw of the handle 1 pushes the expansion core piece 5 into the workpiece to be processed. After the expansion wings 52 lose the effect of the expansion core connecting piece 3, they expand, realizing self-positioning expansion clamping of the workpiece to be processed from the center to the outside, and then processing is carried out, improving the processing quality of the workpiece to be processed, reducing the labor intensity, and improving the production efficiency. One set of expansion core fixture can be reused as long as different specifications of expansion core connecting pieces are replaced to match different expansion core pieces, thereby reducing the manufacturing cost.
[0021] As a preferred embodiment, as Figure 2 and Figure 4 shown, the mounting seat 6 is further provided with a set of fixed connection holes 61, and the mounting seat 6 is fixedly connected to the connection hole of the expansion core connecting piece 3 through bolts passing through the fixed connection holes 61.
[0022] As a preferred embodiment, as Figure 2 and Figure 6 shown, the expansion core connecting piece 3 is provided with an exhaust hole 32 connected to the central hole of the expansion core connecting piece 3, avoiding the pressure of compressed air during installation and reducing the labor intensity of installation.
[0023] As a preferred embodiment, as Figure 2 shown, a first flange 8 is arranged on one side of the fixed seat 2 where the handle 1 is installed. A second flange 9 is arranged on the outer surface of the expansion core connecting piece 3. The first flange 8 and the second flange 9 are fastened by bolts, providing a stable support system for the expansion core fixture and improving the convenience of operation.
[0024] As a preferred embodiment, as Figure 2 shown, a rotating seat 10 is arranged in the center of the first flange 8. The screw of the handle 1 passes through the rotating seat 10 and the mounting seat 6 and is threadedly connected to the expansion core hole 51.
[0025] Although the specific implementation manners of the present utility model have been described and explained in detail above, it should be pointed out that: various equivalent changes and modifications can be made to the above implementation manners according to the concept of the present utility model, and when the functions and effects generated thereby still do not exceed the spirit covered by the specification, they should all be within the protection scope of the present utility model.
Claims
1. The core expansion fixture is characterized by: It comprises a handle, a fixing seat, an expanding core connector, a positioning connector, an expanding core member and a mounting seat; the fixing seat is provided with a central mounting hole; the mounting seat is arranged in the central mounting hole of the fixing seat, and a spring mounting cavity is arranged in the mounting seat; a spring is arranged in the spring mounting cavity; one side of the expanding core connector is contacted and fixed with the mounting seat, and the outer cylindrical surface of the other side is sleeved with a positioning connector; a compression block is arranged in the inner hole of the outer cylindrical surface of the expanding core connector; the expanding core member has one large end and one small end, an expanding core hole is arranged inside the small end, and an expansion wing is arranged on the outer surface; the small end of the expanding core member is arranged in the central hole of the expanding core connector, and the screw end of the handle arranged in the mounting seat is threadedly connected with the expanding core hole.
2. The core expansion fixture according to claim 1, characterized in that: The mounting seat is also provided with a group of fixed connection holes, and the mounting seat is fixedly connected with the connection holes of the expansion core connector by bolts passing through the fixed connection holes.
3. The core expansion fixture according to claim 1, characterized in that: The expansion core connector is provided with an exhaust hole connected to the central hole of the expansion core connector.
4. The core expansion fixture according to claim 1, characterized in that: A first flange is arranged on one side of the fixing seat mounting handle; a second flange is arranged on the outer surface of the expansion core connecting piece; and the first flange is fastened to the second flange by bolts.
5. The core expansion fixture according to claim 4, characterized in that: A rotating seat is arranged in the center of the first flange; the screw of the handle passes through the rotating seat and the mounting seat and is threadedly connected with the core expansion hole.