High-precision rapid elastic circumferential clamping device

Abstract

The utility model belongs to the field of design and processing of products, and particularly relates to a high-precision rapid elastic circumferential clamping device. The device comprises an elastic four-groove clamping device body and four semi-through grooves. The four semi-through grooves comprise two groups of semi-through grooves, one group of semi-through grooves are downwards slotted from the top of the four-groove clamping device body, and the other group of semi-through grooves are upwards slotted from the bottom of the four-groove clamping device body; the semi-through grooves in the same group are located on the same straight line, and the two straight lines are perpendicular to each other. The device can realize accurate positioning and reliable fixation of high-precision shaft sleeve parts, and has the advantages of low manufacturing cost, wide application range, simplicity, convenience and rapidness in processing and easiness in action realization.

Description

Technical Field

[0001] This utility model belongs to the field of product design and processing, and specifically relates to a high-precision, fast, elastic circumferential clamping device. Background Technology

[0002] In the process of positioning and machining shaft parts, it is necessary to ensure that the outer diameter of the precision shaft parts is used for positioning and clamping. However, since the outer diameter of the shaft often varies and is not within the range applicable to conventionally sized spring collets, or if the equipment does not have spring collets, using three-jaw or four-jaw methods may cause problems such as damage to the parts, large clamping errors, low efficiency, and inability to clamp small parts. Utility Model Content

[0003] The purpose of this invention is to address the problems of large variations in the outer diameter of precision shaft parts, the large clamping errors of general-purpose spring collets and chucks, their inapplicability, and the risk of clamping damage. This invention provides a simple structure that can quickly and accurately position and reliably clamp the parts, ensuring precise positioning and clamping, and achieving the goal of fast and low-cost machining.

[0004] The technical solution of this utility model is:

[0005] A high-precision, fast, elastic circumferential clamping device is provided, comprising an elastic four-groove clamping device body and four semi-through grooves;

[0006] The four semi-through slots include two sets of semi-through slots. One set of semi-through slots is slotted from the top of the four-slot clamping device body downwards, and the other set of semi-through slots is slotted from the bottom of the four-slot clamping device body upwards. The semi-through slots in the same set are located on a straight line, and the two straight lines are perpendicular to each other.

[0007] Furthermore, the four-groove clamping device body includes: an axial positioning platform, a positioning hole, and a clamping outer circle;

[0008] An axial positioning platform is provided at the top of the clamping outer circle, and the two are hollow to form a positioning hole; four semi-through grooves, positioning holes, and clamping outer circle form an elastic thin wall; two of the four semi-through grooves are 180° apart as a group, the first groove and the second groove opening from the bottom to the top are a group, and the third groove and the fourth groove opening from the top to the bottom are a group, staggered by 90° from two different directions.

[0009] The outer circle of the part is placed into the positioning hole, the outer circle is clamped, and the elastic thin wall tightens, so that the expanded hole diameter shrinks to the size before slotting, thus achieving precise clamping of shaft parts.

[0010] Furthermore, the first to fourth slots are located in the symmetrical middle of the elastic four-slot clamping device. The first and second slots are symmetrical structures with an angle of 180°, and the third and fourth slots are symmetrical structures with an angle of 180°. The connecting part has a size of 1.5mm-5mm.

[0011] Furthermore, the coaxiality error between the positioning hole and the clamping outer circle should be within 0.01mm, or adjusted according to the machining accuracy.

[0012] Furthermore, the thickness C of the flexible thin wall depends on the aperture size and the material of the device. For small sizes, the thickness is about 1.5 mm for aluminum and copper materials, and about 1 mm for steel materials. For large sizes, the thickness can be increased appropriately.

[0013] Furthermore, the width A of the four semi-through slots depends on the inner hole size of the clamping device, with a small size of 0.3mm-0.5mm and a large size of 1-5mm. The length of the non-through connecting part B is about 1.5mm-5mm, which can be adjusted according to the required clamping length. The diameter D of the positioning hole is 0.01mm larger than the diameter of the part.

[0014] Beneficial effects: This device can achieve the following three functions:

[0015] 1. The flexible four-slot clamping device can be quickly installed on the machine tool using spring collets or three-jaw chucks.

[0016] 2. By using the positioning hole φD, whose size matches the outer diameter of the part, the outer diameter is clamped, and the elastic thin wall tightens, causing the expanded hole diameter to shrink back to its original size before slotting, thus achieving precise clamping of shaft-type parts. This enables accurate positioning, reduces alignment time, and improves positioning accuracy.

[0017] 3. The elasticity of the four-groove clamping device can be adjusted by adjusting the thickness C of the elastic thin wall. Attached Figure Description

[0018] Figure 1 A three-dimensional diagram of a high-precision, fast, elastic circumferential clamping device;

[0019] Figure 2 This is a left view of a high-precision, fast, elastic circumferential clamping device;

[0020] Figure 3 This is a 3D diagram of the reaction rod of a hydraulic valve. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0022] This utility model provides a high-precision, fast, elastic circumferential clamping device, such as... Figure 1 As shown, the device includes a body 1 of an elastic four-slot clamping device, four semi-through slots, an axial positioning platform 15, a positioning hole 16, and a clamping outer circle 17. The four semi-through slots, the positioning hole 13, and the clamping outer circle 14 form an elastic thin wall.

[0023] Of the four semi-through slots, two are grouped at 180° intervals. Slots 11 and 12 form one group, and slots 13 and 14 form another. They are staggered by 90° from two different directions. The slot width A depends on the inner hole size of the clamping device, ranging from 0.3mm-0.5mm for smaller sizes to 1-5mm for larger sizes. The length of the non-through connecting part B is approximately 1.5mm-5mm, adjustable according to the required clamping length. The size of the positioning hole 16 is... The diameter of the clamping part should be 0.01mm larger than the diameter of the clamping part. The coaxiality error between the positioning hole 16 and the clamping outer circle 17 should be within 0.01mm. The coaxiality can be adjusted according to the processing requirements. The thickness C of the elastic thin wall depends on the hole diameter and the material of the device. For small sizes, the thickness is about 1.5mm for aluminum and copper materials, and about 1mm for steel materials. For large sizes, the thickness can be increased appropriately. The outer circle of the part to be clamped is placed into the positioning hole 16, and the outer circle 17 is clamped. The elastic thin wall tightens, so that the expanded hole diameter shrinks to the size before slotting, realizing the precision clamping of shaft parts.

[0024] Regardless of the outer diameter of the part, the positioning hole is 16. Depending on the required precision, it can be machined to have a clearance of 0.005mm-0.01mm or larger to match the outer diameter of the part.

[0025] like Figure 1 , Figure 2 As shown, a high-precision, fast, elastic circumferential clamping device includes an elastic four-groove clamping device body 1, four semi-through grooves, an axial positioning platform 15, a positioning hole 16, and a clamping outer circle 17.

[0026] During use, the outer circle of the clamping part is placed into the positioning hole 16, and the clamping outer circle 17 is installed in the lathe spring collet or three-jaw clamping mechanism. The elastic thin wall tightens, so that the expanded hole diameter shrinks to the size before slotting, thus achieving precise clamping of shaft parts.

[0027] Example

[0028] like Figure 3 As shown, this embodiment takes the outer diameter clamping of a reaction rod of a certain type of hydraulic valve as an example. This part is a typical slender rod-like part, and the clamping outer diameter of the part is... 11mm in length, requires machining The outer circle is small, the clamping part is highly precise, and the material is beryllium bronze. When clamping, it is necessary to reliably and precisely clamp it without damaging the outer circle.

[0029] Based on the diameter of the reaction rod Design positioning hole 16 is The wall thickness C is 1.5mm, the groove width of the first to fourth grooves is 0.3mm, the connection dimension B is 1.5mm, the axial positioning table 15 is 1.2mm, the positioning hole 16 and the clamping outer circle 17 are coaxial with 0.02, and the total length is 10.5.

Claims

1. A high-precision, rapid, elastic circumferential clamping device, characterized in that, Includes the body of the elastic four-groove clamping device (1) and four semi-through grooves; The four semi-through grooves include two sets of semi-through grooves. One set of semi-through grooves is slotted from the top of the elastic four-groove clamping device body (1) downwards, and the other set of semi-through grooves is slotted from the bottom of the elastic four-groove clamping device body (1) upwards. The semi-through grooves in the same set are located on a straight line, and the two straight lines are perpendicular to each other.

2. The high-precision, rapid, elastic circumferential clamping device as described in claim 1, characterized in that, The body (1) of the elastic four-groove clamping device includes: an axial positioning table (15), a positioning hole (16), and a clamping outer circle (17); An axial positioning platform (15) is provided on the top of the clamping outer circle (17), and the two are hollow to form a positioning hole (16); the four semi-through grooves, the positioning hole (16), and the clamping outer circle (17) form an elastic thin wall; two of the four semi-through grooves are 180° apart and form a group, the first groove (11) and the second groove (12) opening from the bottom to the top are a group, and the third groove (13) and the fourth groove (14) opening from the top to the bottom are a group, staggered by 90° from two different directions; The outer circle of the part is placed into the positioning hole (16), the outer circle (17) is clamped, the elastic thin wall is tightened, so that the expanded hole diameter shrinks to the size before the slot is opened, thus realizing the precision clamping of shaft parts.

3. The high-precision, rapid, elastic circumferential clamping device as described in claim 1, characterized in that, The first to fourth slots are located in the symmetrical middle part of the body (1) of the elastic four-slot clamping device. The first slot (11) and the second slot (12) are symmetrical structures with an angle of 180°. The third slot (13) and the fourth slot (14) are symmetrical structures with an angle of 180°. The size of the connecting part is 1.5mm-5mm.

4. The high-precision, rapid, elastic circumferential clamping device as described in claim 2, characterized in that, The coaxiality error between the positioning hole (16) and the clamping outer circle (17) should be within 0.01mm, or adjusted according to the machining accuracy.

5. The high-precision, rapid, elastic circumferential clamping device as described in claim 1, characterized in that, The thickness C of the flexible thin wall depends on the aperture size and the material of the device. For small sizes, the thickness is about 1.5 mm for aluminum and copper materials, and about 1 mm for steel materials. For large sizes, the thickness can be increased appropriately.

6. The high-precision, rapid, elastic circumferential clamping device as described in claim 1, characterized in that, The width A of the four semi-through slots depends on the inner diameter of the clamping device; for smaller sizes, it is 0.3mm-0.5mm, and for larger sizes... The length of dimension B for different connecting parts is approximately 1.5mm-5mm, and can be adjusted according to the required clamping length. The diameter D of the positioning hole (16) is 0.01 mm larger than the diameter of the part.

Images