CN220127613U - Eccentric workpiece turning tool - Google Patents

Abstract

The utility model discloses an eccentric workpiece turning tooling, which includes a processing disc and a fixing mechanism. A workpiece is detachably installed above the processing disc; the fixing mechanism is detachably installed on the processing disc and fixes and limits the workpiece; The mechanism includes a cylindrical internal thread expansion sleeve positioning plate matched with the processing disk, a circular gasket matched with the cylindrical internal thread expansion sleeve positioning disk, and a tightening screw for fixing the workpiece. This utility model's eccentric workpiece turning tooling adopts a "planar-cylindrical internal thread expansion sleeve" positioning structure, which eliminates the gap in positioning the workpiece hole, realizes gap-free and zero-error positioning, and solves the above-mentioned classic "plane-axis" problem. "There are shortcomings in the tooling, and the high-precision positioning function of the "Planar-Cylindrical Internal Thread Expansion Sleeve" effectively meets the technical requirements for high-precision workpiece positioning. The unique duality of the cylindrical internal thread expansion sleeve can be tightened and the thread can be disassembled. function, also facilitates the loading and unloading of workpieces.

Description

An eccentric workpiece turning tool

Technical field

The utility model relates to the technical field of workpiece processing, in particular to an eccentric workpiece turning tool.

Background technique

In the mechanical processing industry, there are many tooling used for positioning the inner hole of the workpiece, among which the classic "plane-axis" positioning tooling structure is commonly used, which can meet the needs of the processing technology. If the machining tolerance range of the workpiece hole is large, but the position tolerance range is small, and the gap when using the classic "plane-axis" positioning tooling is too large, the positioning tolerance will be out of tolerance, resulting in the workpiece The positioning is unreliable or out of tolerance, making it difficult to guarantee the processing quality and technical requirements of the workpiece.

The current solution is to group the workpieces into groups and select positioning axes for processing. The second is to narrow the machining tolerance range of the holes in advance to ensure the matching clearance with the positioning axes. This also brings about the problem of installation difficulties and increased costs when the clearance is too small.

There is an eccentric part in the high-voltage switchgear. The turning process requires positioning the left end face and the hole, and processing the dimensions of the right end. Since the eccentricity tolerance range is small, the tolerance range of the machined hole size is relatively large. It is useful to use "plane-axis" tooling for positioning. When the eccentricity is out of tolerance, it cannot meet the requirements of part processing quality. For this reason, we propose an eccentric workpiece turning tooling.

Utility model content

The main purpose of this utility model is to provide an eccentric workpiece turning tool, which can effectively solve the problems in the background technology.

In order to achieve the above purpose, the technical solution adopted by this utility model is:

An eccentric workpiece turning tooling includes a processing disc and a fixing mechanism. A workpiece is detachably installed above the processing disc; the fixing mechanism is detachably installed on the processing disc and fixes and limits the workpiece; wherein, The upper end surface of the processing disk is provided with an eccentric hole; the fixing mechanism includes a cylindrical internal thread expansion sleeve positioning plate matched with the processing disk, a circular gasket matching the cylindrical internal thread expansion sleeve positioning disk and a workpiece With fixed expansion screws, the workpiece can be closely connected to the cylindrical internal thread expansion sleeve positioning plate.

Preferably, the fixing mechanism also includes a counterweight plate removably installed on one side of the processing disk and a fastening bolt that fixes the counterweight disk to the processing disk. The processing disk is provided with fastening bolts. Matching bolt holes.

Preferably, the cylindrical internal thread expansion sleeve positioning disk is arranged in a disk shape, and the cylindrical internal thread expansion sleeve positioning disk is symmetrically provided with several sets of first screws fixed to the processing disk.

Preferably, the upper end surface of the cylindrical internal thread expansion sleeve positioning plate is provided with a positioning expansion sleeve that matches the workpiece, and the lower end surface of the cylindrical internal thread expansion sleeve positioning plate is provided with a positioning boss corresponding to the eccentric hole.

Preferably, the workpiece and the cylindrical internal thread expansion sleeve positioning plate are both provided with diamond-shaped pins for matching with the processing disk, and the cylindrical internal thread expansion sleeve positioning disk is provided with pin holes that match the diamond-shaped pins.

Preferably, the circular washer is provided with a threaded hole that matches the tightening screw. The circular washer is arranged on the inner bottom surface of the workpiece. The tightening screw passes through the first threaded hole and is fixed on the positioning screw. The lower end surface of the workpiece is provided with a positioning hole that matches the positioning expansion sleeve.

Preferably, the processing disc is provided with several sets of second screws for positioning, and the several sets of second screws are symmetrically arranged on the processing disc.

Preferably, the bolt hole and the eccentric hole are both arranged on the center line of the processing disk.

Compared with the existing technology, the utility model has the following beneficial effects:

Through the set processing disc and fixing mechanism, the positioning structure of "plane-cylindrical internal thread expansion sleeve" is used to eliminate the gap in the positioning of the workpiece hole, achieve gap-free and zero-error positioning, and solve the above-mentioned classic "plane-axis" The shortcomings of the tooling, and the high-precision positioning function of the "planar-cylindrical internal thread expansion sleeve" effectively meets the technical requirements for high-precision workpiece positioning. The unique dual functions of the cylindrical internal thread expansion sleeve can be tightened and the thread can be disassembled. , also facilitates the loading and unloading of workpieces, is convenient for people to use, and increases the applicability of the entire tooling.

Description of drawings

Figure 1 is an overall structural diagram of an eccentric workpiece lathe tool of the present invention;

Figure 2 is an exploded view of the processing disk and the fixing mechanism in the eccentric workpiece lathe tooling of the present invention;

Figure 3 is a partial structural diagram of the processing disk and the fixing mechanism in the eccentric workpiece turning tool of the present invention;

Figure 4 is a top structural view of the workpiece and the processing disc in the eccentric workpiece turning tool of the present invention;

Figure 5 is an exploded view of the processing disc and workpiece in an eccentric workpiece lathe tool of the present invention.

In the picture: 1. Processing disk; 2. Workpiece; 3. Eccentric hole; 4. Cylindrical internal thread expanding sleeve positioning plate; 5. Circular gasket; 6. Tensioning screw; 7. Counterweight plate; 8. Fastening Bolt; 9. Positioning sleeve; 10. Positioning boss; 11. First screw; 12. Diamond pin; 13. Pin hole; 14. Second screw.

Implementation

In order to make it easy to understand the technical means, creative features, objectives and effects of the present utility model, the present utility model will be further elaborated below in conjunction with specific implementation modes.

Referring to Figure 1-5, an eccentric workpiece turning tooling includes a processing disc 1 and a fixing mechanism. A workpiece 2 is detachably installed above the processing disc 1; the fixing mechanism is detachably installed on the processing disc 1 and is attached to the processing disc 1. The workpiece 2 is fixed and limited; among them, the upper end surface of the processing disc 1 is provided with an eccentric hole 3; the fixing mechanism includes a cylindrical internal thread expansion sleeve positioning plate 4 matched with the processing disc 1, and a cylindrical internal thread expansion sleeve positioning disk 4. Matching circular washers 5 and expansion screws 6 for fixing the workpiece 2. The workpiece 2 can be connected to the cylindrical internal thread expansion sleeve positioning plate 4.

The processing disc 1 can be detachably installed on the lathe spindle.

The fixing mechanism also includes a counterweight plate 7 that can be detachably installed on one side of the processing disc 1 and a fastening bolt 8 that fixes the counterweight plate 7 to the processing disc 1. The processing disc 1 is provided with fastening bolts 8. Matching bolt holes.

The cylindrical internal thread expansion sleeve positioning plate 4 is arranged in a disc shape, and the cylindrical internal thread expansion sleeve positioning plate 4 is symmetrically provided with several sets of first screws 11 fixed to the processing disc 1 .

The upper end surface of the cylindrical internal thread expansion sleeve positioning plate 4 is provided with a positioning expansion sleeve 9 that matches the workpiece 2. The lower end surface of the cylindrical internal thread expansion sleeve positioning plate 4 is provided with a positioning boss 10 corresponding to the eccentric hole 3.

The positioning expansion sleeve 9 is an empty slot with ordinary threads and a widened and deepened groove bottom with rounded corners. The outer root of the expansion sleeve is provided with a groove and an arc hollow slot, and a suitable thin wall is formed between the two empty slots. and transition fillet, which are the deformation joints of the four-petal expansion sleeve. When the tightening screw 6 is tightened, the outer diameter of the four-petal expansion sleeve expands to produce elastic deformation, while maintaining the positioning function of the centering position unchanged.

The workpiece 2 and the cylindrical internal thread expansion sleeve positioning plate 4 are both provided with diamond-shaped pins 12 for matching with the processing disk 1. The cylindrical internal thread expansion sleeve positioning plate 4 is provided with pin holes 13 that match the diamond-shaped pins 12.

One end of the diamond pin 12 is a cylindrical pin, and the other end is configured as a diamond pin structure. The function of the diamond pin 12 is to eliminate the over-positioning of the two holes during positioning.

The circular washer 5 is provided with a threaded hole that matches the tightening screw 6. The circular washer 5 is arranged on the inner bottom surface of the workpiece 2. The tightening screw 6 passes through the first threaded hole and is fixed on the positioning expansion sleeve 9. The lower end surface of the workpiece 2 is provided with a positioning hole that matches the positioning expansion sleeve 9 .

The processing disk 1 is provided with several sets of second screws 14 for positioning. The plurality of sets of second screws 14 are symmetrically arranged on the processing disk 1 .

The bolt hole and the eccentric hole 3 are both arranged on the center line of the processing disc 1.

It should be noted that this utility model is an eccentric workpiece turning tool. When used:

During assembly, install the positioning boss 10 on the positioning plate 4 with the cylindrical internal thread expansion sleeve in the eccentric hole 3 on the right end surface of the processing disk 1, install the cylindrical pin with the diamond pin 12 into the pin hole 13, and expand the cylindrical internal thread The positioning plate 4 is fixed to the processing disc 1. The diamond pin 12 is placed horizontally to constrain the degree of freedom of the rotation direction of the workpiece 2. The first screw 11 is then connected to the threaded hole of the processing disc 1 and fixed. When using the tooling, The positioning boss 10 of the processing disk 1 is positioned and installed on the connecting plate of the lathe spindle, and is fastened with six second screws 14.

During turning, the workpiece 2 is installed on the positioning expansion sleeve 9, and the angular position is determined with the diamond pin 12. While the workpiece 2 is pressed with the tensioning screw 6 and the circular gasket 5, the tensioning screw 6 also stretches the cylinder. The internal thread expands the outer circle of the sleeve and tightens the inner hole of the workpiece 2, achieving zero error in positioning the hole without gaps.

"Planar-cylindrical internal thread expansion sleeve" positioning structure principle:

A cylindrical four-petal internal thread expansion sleeve structure is provided on the right end of the processing disc 1. The spiral cone surface formed by the bevel on one side of the external thread profile is used to radially expand the internal thread profile contact due to the axial displacement generated during rotation. The fixed spiral cone surface has the same principle and function as the conical expansion sleeve, but the expressions of the two cones are different. When the workpiece 2 is installed on the outer circle of the four-petal internal thread expansion sleeve by the end face and tightened with the expansion screw 6 and the circular washer 5, the spiral cone surface of the external thread also undergoes axial displacement, and then the internal thread is compressed. The fixed spiral cone surface causes the outer circle of the four-petal internal thread expansion sleeve to expand and tighten the inner hole of the workpiece 2, thereby achieving the combined function of compressing the workpiece 2 and eliminating the gap in the positioning hole. It adopts standard thread matching structure, and has mature technology, technology, cutting tools and processing machine tools to make it simple and easy to make. When the four-petal internal thread expansion sleeve is elastically slightly deformed by force and the inner hole of the workpiece is tightened, the two form a fixed nut structure, maintaining the original function of the thread matching structure.

The "planar-cylindrical internal thread expansion sleeve" positioning structure completely retains the original function of the thread matching structure, and utilizes the radial deformation caused by the force on the thread slope to achieve two functions of expanding and compressing the workpiece 2 Function, it is a universal, easy-to-use, high-precision machining fixture device.

Through the set processing disc 1 and fixed mechanism, the positioning structure of "plane-cylindrical internal thread expansion sleeve" is used to eliminate the gap in the positioning of the workpiece hole, achieve gap-free and zero-error positioning, and solve the above-mentioned classic "plane-axis" problem. "There are shortcomings in the tooling, and the high-precision positioning function of the "Planar-Cylindrical Internal Thread Expansion Sleeve" effectively meets the technical requirements for high-precision workpiece positioning. The unique duality of the cylindrical internal thread expansion sleeve being expandable and removable. The function also facilitates the loading and unloading of workpieces, facilitates people's use, and increases the applicability of the entire tooling.

The basic principles and main features of the present utility model and the advantages of the present utility model are shown and described above. Those skilled in the industry should understand that the present utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model can be There will also be various changes and improvements in the new model, and these changes and improvements all fall within the scope of the claimed utility model. The protection scope of the present utility model is defined by the appended claims and their equivalents.

Claims (8)

1. An eccentric workpiece turning tool, comprising:

a processing disc (1) with a workpiece (2) detachably arranged above;

the fixing mechanism is detachably arranged on the processing disc (1) and is used for fixing and limiting the workpiece (2);

wherein, the upper end surface of the processing disc (1) is provided with an eccentric hole (3);

the fixing mechanism comprises a cylindrical internal thread expansion sleeve positioning disc (4) matched with the processing disc (1), a round gasket (5) matched with the cylindrical internal thread expansion sleeve positioning disc (4) and a tension screw (6) for fixing the workpiece (2), and the workpiece (2) can be connected with the cylindrical internal thread expansion sleeve positioning disc (4) in a fitting mode.

2. The eccentric workpiece turning fixture as claimed in claim 1, wherein: the fixing mechanism further comprises a counterweight disc (7) detachably arranged on one side of the processing disc (1) and a fastening bolt (8) for fixing the counterweight disc (7) on the processing disc (1), and bolt holes matched with the fastening bolt (8) are formed in the processing disc (1).

3. The eccentric workpiece turning fixture as claimed in claim 2, wherein: the cylindrical internal thread expansion sleeve positioning disc (4) is arranged in a disc shape, and a plurality of groups of first screws (11) fixed with the processing disc (1) are symmetrically arranged on the cylindrical internal thread expansion sleeve positioning disc (4).

4. An eccentric workpiece turning fixture as claimed in claim 3, wherein: the upper end face of the cylindrical internal thread expansion sleeve positioning disc (4) is provided with a positioning expansion sleeve (9) matched with the workpiece (2), and the lower end face of the cylindrical internal thread expansion sleeve positioning disc (4) is provided with a positioning boss (10) corresponding to the eccentric hole (3).

5. The eccentric workpiece turning fixture as claimed in claim 2, wherein: the workpiece (2) and the cylindrical internal thread expansion sleeve positioning disc (4) are respectively provided with a diamond pin (12) matched with the processing disc (1), and the cylindrical internal thread expansion sleeve positioning disc (4) is provided with a pin hole (13) matched with the diamond pin (12).

6. The eccentric workpiece turning fixture as recited in claim 5, wherein: the automatic tensioning device is characterized in that a threaded hole matched with the tensioning screw (6) is formed in the round gasket (5), the round gasket (5) is arranged on the inner bottom surface of the workpiece (2), the tensioning screw (6) penetrates through the first threaded hole and is fixed on the positioning tensioning sleeve (9), and a positioning hole matched with the positioning tensioning sleeve (9) is formed in the lower end face of the workpiece (2).

7. The eccentric workpiece turning fixture as claimed in claim 1, wherein: a plurality of groups of second screws (14) used for limiting are arranged on the processing disc (1), and the groups of second screws (14) are symmetrically arranged on the processing disc (1).

8. The eccentric workpiece turning fixture as claimed in claim 2, wherein: the bolt holes and the eccentric holes (3) are all arranged on the central line of the processing disc (1).