CN205309883U - Turning fixture - Google Patents

Abstract

The utility model discloses a lathe clamp, which comprises a mandrel used to be clamped between two top ends of lathe equipment. The mandrel passes through the shaft hole to clamp a workpiece to be processed. Matching with the first positioning surface, the second positioning surface for positioning the workpiece to be processed, and the second step for abutting against the first step; The fastening part that fixes the workpiece on the mandrel and the mandrel. When using the lathe fixture of the utility model to clamp and position the workpiece to be processed, the positioning and alignment can be achieved by matching the first positioning surface and the second positioning surface, so the operation is simple, and the positioning is accurate and convenient, and can satisfy Dimensional tolerance and accuracy requirements for parts with high dimensional accuracy; when processing the end faces and outer circles of the opposite ends of the workpiece to be processed at the same time, there is no need to reposition and align, thereby reducing the operating difficulty of the operator in the process of clamping and positioning, and improving Production efficiency and product quality.

Description

Turning fixture

technical field

The utility model relates to the field of auxiliary fixtures, in particular to a turning fixture.

Background technique

When the high-speed coupling in the power unit of a fracturing vehicle is in the turning process, multiple end faces and outer circles need to be processed, and the perpendicularity requirements between the outer circle and the end face and the coaxiality requirements between the outer circle and the shaft hole must be guaranteed.

When processing a general coupling, it mainly relies on the chuck to clamp the end face and outer circle of the car, and then turn around to clamp the other end faces and outer circle of the car. During processing, it is difficult to locate the workpiece to be processed, and it is difficult to find the datum. For parts with high precision requirements, the dimensional accuracy is not easy to guarantee during the processing.

Utility model content

The utility model provides a lathe fixture to solve the technical problems of difficult positioning, difficult alignment of references and difficult guarantee of dimensional accuracy existing in the processing of existing shaft couplings.

The technical scheme that the utility model adopts is as follows:

A lathe fixture used for clamping and locating workpieces to be processed, wherein the workpiece to be processed is a shaft part on which is processed a shaft hole connecting its two end faces, and the inner wall of the shaft hole is provided with a ring-shaped first positioning surface, and the first step protruding toward its center, the turning fixture includes a mandrel for clamping between the two tops of the turning equipment, the mandrel passes through the shaft hole to clamp the workpiece to be processed, and the outer part of the mandrel The circle is provided with a second positioning surface for matching with the first positioning surface to position the workpiece to be processed, and a second step for abutting against the first step; A fastening part that fixes the workpiece mounted on the mandrel to the mandrel.

Further, the mandrel includes a connected positioning section and an installation section, the outer diameter of the installation section is smaller than the outer diameter of the positioning section, and the connection between the end surface of the positioning section and the installation section forms a second step; the second positioning surface is arranged on the positioning section On the outer circle of the installation section; the fastening parts are installed on the outer circle of the installation section.

Further, the positioning section includes a connected first section and a second section; the outer circle of the first section forms a second positioning surface; the second section is connected to the installation section, and the connection between the end surface of the second section and the installation section forms a second positioning surface. Two steps.

Further, the fastening part includes a lock nut for tightening the first step and the second step on the workpiece to be processed installed on the mandrel, so that the workpiece to be processed and the mandrel are fixed; It is arranged on the outer circle of the installation section and is threadedly connected with the installation section.

Further, the installation section includes a third section and a fourth section connected; the third section is connected with the positioning section and matched with the shaft hole; the lock nut is installed on the outer circle of the fourth section.

Further, the outer diameter of the fourth section is smaller than that of the third section, and the outer circle of the fourth section is provided with an external thread for threaded connection with the lock nut.

Further, the fastening part further includes a retaining ring for being installed on the outer circle of the third section, and the retaining ring is arranged between the workpiece to be processed and the locking nut.

Further, the fastening part further includes a washer for being installed on the fourth segment, and the washer is arranged between the retaining ring and the lock nut.

Further, the mandrel also includes a connection section connected to the end of the positioning section, and the outer diameter of the connection section is the same as that of the installation section.

Further, the end surfaces of both the connecting section and the installation section are respectively provided with center holes for abutting against two centers on the turning equipment respectively.

The utility model has the following beneficial effects:

Compared with the existing clamping and positioning methods, when using the lathe tool fixture of the utility model to clamp and position the workpiece to be processed, the positioning and alignment can be achieved through the matching of the first positioning surface and the second positioning surface, so the operation is simple , and the positioning is accurate and convenient, and can meet the dimensional tolerance and precision requirements of parts with high dimensional accuracy; when processing the end faces and outer circles of the opposite ends of the workpiece to be processed at the same time, there is no need to reposition and align, which can reduce the operator's work. The difficulty of operation in the process of clamping and positioning will ultimately improve production efficiency and product quality.

In addition to the purposes, features and advantages described above, the present invention has other purposes, features and advantages. Below with reference to figure, the utility model is described in further detail.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model, and do not constitute an improper limitation of the utility model. In the attached picture:

Fig. 1 is the sectional structure schematic diagram of workpiece to be processed;

Fig. 2 is a structural schematic view of the lathe fixture of the preferred embodiment of the present invention when clamping and positioning the workpiece to be processed;

Fig. 3 is a schematic cross-sectional structure diagram of a mandrel in the turning fixture in Fig. 2 .

illustration

10, workpiece to be processed; 101, shaft hole; 102, first positioning surface; 103, first step; 20, mandrel; 21, positioning section; 211, first section; 212, second section; 22, installation section 221, the third section; 222, the fourth section; 23, the connection section; 201, the second positioning surface; 202, the second step; 30, the fastening part; 31, the lock nut; 32, the retaining ring; 33, washer.

detailed description

The embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings, but the utility model can be implemented in various ways defined and covered by the claims.

As shown in Figures 1 and 2, the preferred embodiment of the present utility model provides a lathe fixture for clamping and positioning the workpiece 10 to be processed, wherein the workpiece 10 to be processed is a shaft part on which a connecting The shaft holes 101 on its two end faces, the inner wall of the shaft hole 101 are provided with an annular first positioning surface 102 and a first step 103 protruding toward its center. The mandrel 20 between the two tops shown in Fig. 10 positioning second positioning surface 201, and the second step 202 for abutting against the first step 103; the lathe tool fixture also includes for being installed on the outer circle of the mandrel 20 to be installed on the mandrel 20 The fastening component 30 that fixes the workpiece 10 and the mandrel 20 to be processed. When using the lathe fixture of the present utility model to clamp and position the workpiece 10 to be processed, firstly, the mandrel 20 is passed through the shaft hole 101 on the workpiece 10 to be processed, because the mandrel 20 is provided with the first positioning surface 102 for matching. Two positioning surfaces 201, when the workpiece 10 to be processed is clamped on the mandrel 20, under the mutual matching effect of the first positioning surface 102 and the second positioning surface 201, the workpiece 10 to be processed is positioned while being clamped, and then the The fastening part 30 is clamped on the mandrel 20 to lock the workpiece 10 to be processed and the mandrel 20, and finally the mandrel of the workpiece 10 to be processed is clamped between the two top ends of the turning equipment. , first process the outer circle and end face of one end of the workpiece 10 to be processed, and then turn the mandrel 20 to process the outer circle and end face of the other end of the workpiece 10 to be processed. Compared with the existing clamping and positioning methods, when the workpiece 10 to be processed is clamped and positioned using the lathe fixture of the present utility model, the positioning and alignment can be achieved through the matching of the first positioning surface 102 and the second positioning surface 201, Therefore, the operation is simple, and the positioning is accurate and convenient, and can meet the dimensional tolerance and precision requirements of parts with high dimensional accuracy; when processing the end faces and outer circles of the opposite ends of the workpiece 10 to be processed at the same time, there is no need for repositioning and alignment, so that Reduce the operating difficulty of the operator in the process of clamping and positioning, and ultimately improve production efficiency and product quality.

Optionally, as shown in Figures 2 and 3, the mandrel 20 includes a connected positioning segment 21 and a mounting segment 22, the outer diameter of the mounting segment 22 is smaller than the outer diameter of the positioning segment 21, and the end surface of the positioning segment 21 is aligned with the mounting segment 22 forms a second step 202 ; the second positioning surface 201 is set on the outer circle of the positioning section 21 ; the fastening component 30 is installed on the outer circle of the mounting section 22 .

Preferably, in order to shorten the processing length of the second positioning surface 201 along the axial direction of the mandrel 20, reduce the processing difficulty of the operator, reduce the processing amount, and increase the processing speed, in a specific embodiment of the present invention, as shown in Figure 3 , the positioning section 21 includes a connected first section 211 and a second section 212; the outer circle of the first section 211 is provided with a second positioning surface 201; the second section 212 is connected with the installation section 22, and the end surface of the second section 212 The connection with the installation section 22 forms a second step 202 .

In the present utility model, as shown in FIG. 2, the fastening part 30 includes a first step 103 and a second step 202 for tightening the first step 103 and the second step 202 on the workpiece 10 installed on the mandrel 20, so that the workpiece to be processed 10 and a lock nut 31 fixed to the mandrel 20; the lock nut 31 is installed on the outer circle of the installation section 22 and is threadedly connected with the installation section 22. When the workpiece 10 to be processed is installed on the mandrel 20, the end face of the workpiece 10 to be processed can be abutted by turning the lock nut 31, and the first step on the workpiece 10 to be processed can be reached by turning the lock nut 31 continuously. 103 is pressed against the second step 202 on the mandrel 20, so that the workpiece 10 and the mandrel 20 are fixed.

Optionally, as shown in FIGS. 2 and 3 , the mounting section 22 includes a connected third section 221 and a fourth section 222; the third section 221 is connected to the positioning section 21 and matches the shaft hole 101; the lock nut 31 Installed on the outer circle of the fourth segment 222 .

In a specific embodiment of the utility model, as shown in Figure 3, the outer diameter of the fourth section 222 is smaller than the outer diameter of the third section 221, and the outer circle of the fourth section 222 is provided with a threaded connection with the lock nut 31 The lock nut 31 is threadedly connected to the fourth section 222 through the cooperation between the internal thread on it and the external thread on the fourth section 222 .

In a specific embodiment of the utility model, as shown in FIG. 3 , in order to further prevent the workpiece 10 mounted on the mandrel 20 from moving along the mandrel 20, the fastening part 30 of the present invention also includes a The retaining ring 32 is disposed on the outer circle of the third section 221 , and the retaining ring 32 is disposed between the workpiece 10 and the locking nut 31 .

In a specific embodiment of the utility model, as shown in Figure 3, in order to prevent the retaining ring 32 from being scratched by the lock nut 31, thus affecting the working performance of the retaining ring 32, the fastening part 30 of the present invention also includes a The washer 33 installed on the fourth section 222 is disposed between the retaining ring 32 and the locking nut 31 .

In a specific embodiment of the utility model, as shown in Figure 2 and Figure 3, the mandrel 20 also includes a connecting section 23 connected to the end of the positioning section 21, and the outer diameter of the connecting section 23 is the same as that of the mounting section 22 .

In the specific embodiment of the utility model, as shown in Fig. 2 and Fig. 3, in order to clamp the mandrel 20 more quickly between the two oppositely arranged tops of the turning equipment, the connection section 23 and the installation section 22 The end surfaces of the two are respectively provided with center holes (not shown) for abutting against two centers on the lathe equipment respectively. In a preferred embodiment of the present invention, the top holes on the end faces of the connecting section 23 and the installation section 22 are located at the centers of the two end faces.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. A turning fixture, used for clamping and positioning a workpiece (10) to be processed, wherein the workpiece (10) to be processed is a shaft part, and a shaft hole (101) connecting its two end faces is processed on it , the inner wall of the shaft hole (101) is provided with an annular first positioning surface (102) and a first step (103) protruding toward its center, characterized in that, The lathe fixture includes a mandrel (20) for being clamped between two tops of the lathe equipment, and the mandrel (20) passes through the shaft hole (101) to clamp the workpiece to be processed ( 10), the outer circle of the mandrel (20) is provided with a second positioning surface (201) for matching with the first positioning surface (102) to position the workpiece (10) to be processed, and on the second step (202) abutting against the first step (103); It also includes a device for being installed on the outer circle of the mandrel (20) to fix the workpiece (10) installed on the mandrel (20) to the mandrel (20). Fastening parts (30). 2. The turning clamp according to claim 1, characterized in that, The mandrel (20) includes a connected positioning section (21) and a mounting section (22), the outer diameter of the installing section (22) is smaller than the outer diameter of the positioning section (21), and the positioning section ( The connection between the end face of 21) and the installation section (22) constitutes the second step (202); The second positioning surface (201) is arranged on the outer circle of the positioning section (21); The fastening component (30) is installed on the outer circle of the installation section (22). 3. The turning fixture according to claim 2, characterized in that, The positioning section (21) includes a connected first section (211) and a second section (212); The outer circle of the first section (211) forms the second positioning surface (201); The second section (212) is connected to the installation section (22), and the connection between the end surface of the second section (212) and the installation section (22) forms the second step (202). 4. The turning fixture according to claim 2, characterized in that, The fastening part (30) includes the first step (103) and the second step (202) installed on the workpiece (10) on the mandrel (20). ) to tighten the locking nut (31) so that the workpiece to be processed (10) and the mandrel (20) are fixed; The lock nut (31) is installed on the outer circle of the installation section (22) and is threadedly connected with the installation section (22). 5. The turning fixture according to claim 4, characterized in that, The installation section (22) includes a connected third section (221) and a fourth section (222); The third section (221) is connected to the positioning section (21) and matched with the shaft hole (101); The locking nut (31) is installed on the outer circle of the fourth section (222). 6. The turning fixture according to claim 5, characterized in that, The outer diameter of the fourth section (222) is smaller than the outer diameter of the third section (221), and the outer circle of the fourth section (222) is provided with a screw thread for the locking nut (31). Connected external thread. 7. The turning fixture according to claim 6, characterized in that, The fastening part (30) also includes a retaining ring (32) for being installed on the outer circle of the third section (221), and the retaining ring (32) is arranged on the workpiece (10) ) and the lock nut (31). 8. The turning fixture according to claim 7, characterized in that, The fastening part (30) also includes a washer (33) for being installed on the fourth segment (222), the washer (33) is arranged on the retaining ring (32) and the locking Between the nuts (31). 9. The turning fixture according to claim 2, characterized in that, The mandrel (20) also includes a connection section (23) connected to the end of the positioning section (21), the outer diameter of the connection section (23) is the same as the outer diameter of the installation section (22) . 10. The turning fixture according to claim 9, characterized in that, The end surfaces of both the connecting section (23) and the mounting section (22) are respectively provided with center holes for abutting against two centers on the turning equipment respectively.