Positioning mechanism for machining thin-wall cylindrical component

Abstract

The utility model discloses a positioning mechanism for processing a thin-wall cylindrical part, which comprises a mounting turntable, a positioning mechanism, a positioning mechanism, a positioning mechanism, a positioning mechanism and a positioning mechanism, and is characterized in that the mounting turntable is in a flat cylindrical shape and a positioning plane is formed at one end of the mounting turntable; the mounting main shaft is cylindrical, one end of the mounting main shaft is connected with the positioning plane, and the mounting main shaft and the mounting turntable are coaxially arranged; the expansion sleeve component is connected with the front end of the mounting main shaft, and the expansion sleeve component and the mounting main shaft are coaxially arranged; the expansion component is arranged in an inner hole of the expansion sleeve component, the expansion component can move in the inner hole of the expansion sleeve component in a reciprocating mode, and the expansion component moves in the first direction to drive the expansion sleeve component to be converted into an expansion state from an initial state. The expansion component moves in the reverse direction relative to the first direction so that the expansion sleeve component can recover from the expansion state to the initial state. The machining precision of the thin-wall component can be improved, and deformation of the component can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a positioning mechanism for processing thin-walled cylindrical parts. Background Art

[0002] In the field of mechanical processing technology, thin-walled cylindrical precision parts need to be precisely processed. In the existing technology, during processing, especially during turning, the cylindrical parts generally need to be positioned by clamps. However, it is difficult to control the clamping force when positioning with clamps. If the clamping force is insufficient, it is easy to cause the workpiece to fall off or deflect when rotating, thereby affecting the processing accuracy. If the clamping force is too large, it will cause damage to the thin-walled parts, especially easy to cause deformation of the thin-walled parts, resulting in the scrapping of the parts. Utility Model Content

[0003] The utility model provides a positioning mechanism for processing thin-walled cylindrical parts, which can improve the processing accuracy of the thin-walled parts and prevent the parts from being deformed.

[0004] In order to solve the above technical problems, the utility model provides a positioning mechanism for processing thin-walled cylindrical parts, comprising:

[0005] An installation turntable is in a flat cylindrical shape, and a positioning plane is formed at one end of the installation turntable;

[0006] An installation spindle, the installation spindle is cylindrical, one end of the installation spindle is connected to the positioning plane, and the installation spindle and the installation turntable are coaxially arranged;

[0007] An expansion sleeve component is connected to the front end of the installation main shaft, and the expansion sleeve component and the installation main shaft are arranged coaxially;

[0008] An expansion component is disposed in the inner hole of the expansion component. The expansion component can reciprocate in the inner hole of the expansion component. The expansion component moves in a first direction to drive the expansion component from an initial state to an expanded state. The expansion component moves in a reverse direction relative to the first direction to restore the expansion component from the expanded state to the initial state. The radial dimension of the expansion component in the expanded state is greater than the radial dimension of the expansion component in the initial state.

[0009] As a preferred embodiment of the above technical solution, the positioning mechanism for processing thin-walled cylindrical components further includes a driving component, and the driving component is connected to the expansion component.

[0010] As a preferred embodiment of the above technical solution, a plurality of through grooves are formed on the expansion sleeve component, wherein the through grooves penetrate the wall of the expansion sleeve component, one end of the through grooves extends to the front end surface of the expansion sleeve component, and the other end of the through grooves extends to the bottom surface close to the inner hole, and the through grooves are distributed in a circular array.

[0011] As a preferred embodiment of the above technical solution, the inner wall of the expansion sleeve component forms a first conical surface, the expansion component is an expansion block, the outer circumferential surface of the expansion block forms a second conical surface, and the first conical surface and the second conical surface are arranged correspondingly.

[0012] As a preferred embodiment of the above technical solution, the first conical surface extends obliquely inward from the front end to the rear end of the expanding sleeve component so that the inner hole of the expanding sleeve component is narrowed from the front end to the rear end of the expanding sleeve component. An annular groove is formed on the expanding sleeve component, and an arc-shaped through-hole is formed at the bottom of the through-groove. The diameter of the arc-shaped through-hole is greater than the width of the through-groove. The arc-shaped through-hole is located in the annular groove. A plurality of mounting holes are provided on the mounting turntable, and the mounting holes are distributed in an annular array around the center of the mounting turntable.

[0013] As a preferred embodiment of the above technical solution, the inclination angle of the first conical surface is 15° to 30°.

[0014] As a preferred embodiment of the above technical solution, the driving component includes a telescopic rod body, and a central through-hole is provided on the mounting turntable. The central through-hole passes through the mounting main shaft and extends to the bottom of the inner hole of the expansion sleeve component. The telescopic rod body extends from one end of the central through-hole and passes through the central through-hole into the inner hole of the expansion sleeve component and is connected with the tightening component.

[0015] As a preferred embodiment of the above technical solution, the expansion component is detachably connected to the telescopic rod.

[0016] As a preferred embodiment of the above technical solution, the central through hole is a threaded hole, the telescopic rod body is a threaded rod, and the telescopic rod body is threadedly connected to the threaded hole.

[0017] As a preferred embodiment of the above technical solution, the diameter of the mounting spindle is larger than the diameter of the expansion sleeve component to form a step surface at the connection between the mounting spindle and the expansion sleeve component, and the mounting spindle is made of a magnetic adsorption material.

[0018] The utility model provides a positioning mechanism for processing thin-walled cylindrical parts, which includes a mounting turntable, a mounting spindle, an expansion sleeve part and a tightening part. The mounting turntable can be fixed on a machine tool and can rotate at high speed with the machine tool. When clamping, the thin-walled cylindrical part is mounted on the expansion sleeve part, and then the expansion sleeve part is driven to move so as to expand outward, thereby tightening and positioning the thin-walled cylindrical part. The thin-walled cylindrical part can be processed by driving the mounting turntable to rotate the whole at high speed. After the processing is completed, the expansion sleeve part can be moved in the opposite direction to restore the expansion sleeve part from the expanded state to the initial state, and the processed thin-walled cylindrical part can be removed from the expansion sleeve part. The entire processing process is not only convenient for loading and unloading, but also more secure in positioning, and at the same time will not cause deformation of the clamping of the parts, thereby improving the yield rate.

[0019] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the three-dimensional structure of a positioning mechanism for processing thin-walled cylindrical parts in this embodiment is shown;

[0021] Figure 2 A schematic diagram of the three-dimensional structure of a positioning mechanism for processing thin-walled cylindrical parts in this embodiment is shown from another angle;

[0022] Figure 3 A schematic exploded perspective view of a positioning mechanism for processing thin-walled cylindrical components in this embodiment is shown;

[0023] Figure 4 A schematic diagram of the connection structure of the expansion sleeve component in this embodiment is shown;

[0024] In the figure: 10, mounting turntable; 20, mounting main shaft; 30, expansion sleeve component; 40, expansion component; 50, driving component; 101, mounting hole; 102, center through hole; 201, step surface; 301, inner hole; 302, through groove; 303, arc-shaped through hole; 304, bottom surface; 305, first conical surface; 306, annular groove; 401, second conical surface. DETAILED DESCRIPTION

[0025] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0026] See also Figures 1 to 4 The embodiment of the present utility model provides a positioning mechanism for processing thin-walled cylindrical parts, comprising:

[0027] The mounting turntable 10 is in the shape of a flat cylinder, and a positioning plane is formed at one end of the mounting turntable 10;

[0028] The mounting spindle 20 is cylindrical in shape, one end of which is connected to the positioning plane, and the mounting spindle 20 is coaxially arranged with the mounting turntable 10;

[0029] The expansion member 30 is connected to the front end of the mounting spindle 20, and the expansion member 30 and the mounting spindle 20 are coaxially arranged;

[0030] The expansion component 40 is disposed in the inner hole 301 of the expanding component 30. The expansion component 40 can reciprocate in the inner hole 301 of the expanding component 30. The expansion component 40 moves in a first direction to drive the expanding component 30 from an initial state to an expanded state. The expansion component 40 moves in a reverse direction relative to the first direction to restore the expanding component 30 from the expanded state to the initial state. The radial dimension of the expanding component 30 in the expanded state is greater than the radial dimension of the expanding component 30 in the initial state.

[0031] The present embodiment provides a positioning mechanism for processing thin-walled cylindrical parts, which includes a mounting turntable 10, a mounting spindle 20, an expansion sleeve part 30 and a tightening part 40. The mounting turntable 10 can be fixed on a machine tool and can rotate at high speed with the machine tool. When clamping, the thin-walled cylindrical part is mounted on the expansion sleeve part 30, and then the expansion sleeve part 30 is driven to move so as to expand outward, thereby tightening and positioning the thin-walled cylindrical part. The thin-walled cylindrical part can be processed by driving the mounting turntable 10 to rotate at high speed as a whole. After the processing is completed, the expansion sleeve part 30 can be moved in the opposite direction to restore the expansion sleeve part 30 from the expanded state to the initial state, and the processed thin-walled cylindrical part can be removed from the expansion sleeve part 30. The entire processing process is not only convenient for loading and unloading, but also more secure in positioning, and will not cause deformation of the clamping of the parts, thereby improving the yield rate.

[0032] In a further feasible embodiment of this embodiment, the positioning mechanism for processing thin-walled cylindrical components further includes a driving component 50 , which is connected to the expansion component 40 .

[0033] The driving component 50 in this embodiment is used to drive the expansion component 40 to move back and forth.

[0034] In a further embodiment of the present invention, a plurality of through-grooves 302 are formed on the expansion member 30. The through-grooves 302 extend through the wall of the expansion member 30. One end of the through-grooves 302 extends to the front end surface of the expansion member 30, and the other end of the through-grooves 302 extends to the bottom surface 304 near the inner hole 301. The through-grooves 302 are distributed in a circular array.

[0035] In this embodiment, the through groove 302 is provided to enable the expansion member 30 to undergo elastic deformation to reach an expanded state.

[0036] In a further embodiment of the present invention, the inner wall of the expansion sleeve component 30 forms a first conical surface 305, the expansion component 40 is an expansion block, and the outer circumferential surface of the expansion block forms a second conical surface 401, and the first conical surface 305 and the second conical surface 401 are correspondingly arranged.

[0037] In a further embodiment of the present embodiment, the first conical surface 305 extends obliquely inward from the front end to the rear end of the expansion component 30 so that the inner hole 301 of the expansion component 30 is narrowed from the front end to the rear end of the expansion component 30. An annular groove 306 is formed on the expansion component 30, and an arc-shaped through hole 303 is formed at the bottom of the through groove 302. The diameter of the arc-shaped through hole 303 is greater than the width of the through groove 302. The arc-shaped through hole 303 is located in the annular groove 306. A plurality of mounting holes 101 are provided on the mounting turntable 10. The mounting holes 101 are distributed in a circular array with the center of the mounting turntable 10 in mind.

[0038] In a further embodiment of the present invention, the inclination angle of the first conical surface 305 is 15° to 30°.

[0039] In a further embodiment of the present invention, the driving component 50 includes a telescopic rod body, and a central through-hole 102 is provided on the mounting turntable 10. The central through-hole 102 extends through the mounting spindle 20 to the bottom of the inner hole 301 of the expansion sleeve component 30. The telescopic rod body extends from one end of the central through-hole 102 and passes through the central through-hole 102 into the inner hole 301 of the expansion sleeve component 30 to be connected with the expansion component 40.

[0040] In a further embodiment of the present invention, the expansion component 40 is detachably connected to the telescopic rod.

[0041] In this embodiment, the expansion component 40 is detachably connected to the telescopic rod body, which can facilitate the disassembly and assembly of the expansion component 40.

[0042] In a further embodiment of the present invention, the central through hole 102 is a threaded hole, the telescopic rod body is a threaded rod, and the telescopic rod body is threadedly connected to the threaded hole.

[0043] In this embodiment, the expansion component 40 is driven to move by rotating the telescopic rod. Specifically, the expansion component 40 is driven to move back and forth by rotating the telescopic rod forward and backward.

[0044] The telescopic rod in this embodiment extends from one end of the central through hole 102 and passes through the central through hole 102 into the inner hole 301 of the expansion sleeve component 30 and is connected to the tightening component 40, which can make the overall structure more compact and easier to operate.

[0045] In a further embodiment of the present invention, the diameter of the mounting spindle 20 is larger than the diameter of the shrink fitting 30 to form a step surface 201 at the connection between the mounting spindle 20 and the shrink fitting 30 . The mounting spindle 20 is made of a magnetically attractive material.

[0046] The step surface 201 in this embodiment can more conveniently position the end of a thin-walled workpiece. The mounting spindle 20 is made of a magnetic adsorption material, which can be adsorbed at the end after the thin-walled part is put on, preventing it from falling before tightening.

[0047] In the description of this specification, reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and integrate different embodiments or examples described in this specification, as well as features of different embodiments or examples, unless they are mutually inconsistent.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0049] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A positioning mechanism for processing thin-walled cylindrical parts, characterized in that: include: An installation turntable is in a flat cylindrical shape, and a positioning plane is formed at one end of the installation turntable; An installation spindle, the installation spindle is cylindrical, one end of the installation spindle is connected to the positioning plane, and the installation spindle and the installation turntable are coaxially arranged; An expansion sleeve component is connected to the front end of the installation main shaft, and the expansion sleeve component and the installation main shaft are arranged coaxially; An expansion component is disposed in the inner hole of the expansion component. The expansion component can reciprocate in the inner hole of the expansion component. The expansion component moves in a first direction to drive the expansion component from an initial state to an expanded state. The expansion component moves in a reverse direction relative to the first direction to restore the expansion component from the expanded state to the initial state. The radial dimension of the expansion component in the expanded state is greater than the radial dimension of the expansion component in the initial state.

2. The positioning mechanism for processing thin-walled cylindrical parts according to claim 1, characterized in that: The positioning mechanism for processing thin-walled cylindrical components further includes a driving component connected to the expansion component.

3. The positioning mechanism for processing thin-walled cylindrical parts according to claim 2, characterized in that: A plurality of through grooves are formed on the expansion sleeve component. The through grooves penetrate the wall of the expansion sleeve component. One end of the through groove extends to the front end surface of the expansion sleeve component, and the other end of the through groove extends to the bottom surface close to the inner hole. The through grooves are distributed in a circular array.

4. The positioning mechanism for processing thin-walled cylindrical parts according to claim 3, characterized in that: The inner wall of the expansion sleeve component forms a first conical surface, the expansion component is an expansion block, the outer circumferential surface of the expansion block forms a second conical surface, and the first conical surface and the second conical surface are arranged correspondingly.

5. The positioning mechanism for processing thin-walled cylindrical parts according to claim 4, characterized in that: The first conical surface extends obliquely inward from the front end to the rear end of the expanding sleeve component so that the inner hole of the expanding sleeve component is narrowed from the front end to the rear end of the expanding sleeve component. An annular groove is formed on the expanding sleeve component, and an arc-shaped through-hole is formed at the bottom of the through-groove. The diameter of the arc-shaped through-hole is greater than the width of the through-groove. The arc-shaped through-hole is located in the annular groove. A plurality of mounting holes are provided on the mounting turntable, and the mounting holes are distributed in an annular array around the center of the mounting turntable.

6. The positioning mechanism for processing thin-walled cylindrical parts according to claim 5, characterized in that: The inclination angle of the first conical surface is 15° to 30°.

7. The positioning mechanism for processing a thin-walled cylindrical component according to any one of claims 2 to 6, characterized in that: The driving component includes a telescopic rod body, and a central through-hole is provided on the mounting turntable. The central through-hole passes through the mounting main shaft and extends to the bottom of the inner hole of the expansion sleeve component. The telescopic rod body extends from one end of the central through-hole and passes through the central through-hole into the inner hole of the expansion sleeve component and is connected with the tightening component.

8. The positioning mechanism for processing thin-walled cylindrical parts according to claim 7, characterized in that: The expansion component is detachably connected to the telescopic rod.

9. The positioning mechanism for processing thin-walled cylindrical parts according to claim 8, characterized in that: The central through hole is a threaded hole, the telescopic rod body is a threaded rod, and the telescopic rod body is threadedly connected to the threaded hole.

10. The positioning mechanism for processing a thin-walled cylindrical component according to any one of claims 2 to 6, characterized in that: The diameter of the installation main shaft is larger than the diameter of the expansion sleeve component so as to form a step surface at the connection between the installation main shaft and the expansion sleeve component. The installation main shaft is made of magnetic adsorption material.

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