Workpiece axial positioning device

Abstract

The utility model provides a workpiece axial positioning device, belongs to the field of machine tool machining, and solves the problem that an existing axial positioning device of a machine tool needs to be corrected again after parts are machined. A hollow oil cylinder is mounted at one end of the pull tube; a hollow chuck is mounted at the other end of the pull tube; a positioning sleeve is mounted on the hollow chuck; a taper sleeve is mounted at the tail end of the positioning sleeve; a machining part is in contact with the inner surface of the positioning sleeve and the Morse tip, and a connecting disc is arranged at the chuck end of the body and clamped with the hollow chuck. The positioning device has the advantages that the positioning sleeve is additionally arranged, the Morse tip is arranged at the tail end of the positioning sleeve, the positioning sleeve can fill a gap between the stay tube and a machined part, and rechecking and positioning are not needed; the Morse center is used for precisely positioning and machining parts, clamping of the hollow chuck is facilitated, and the machining precision is improved.

Description

Technical Field

[0001] The utility model belongs to the field of machine tool processing and relates to a positioning device, in particular to a workpiece axial positioning device. Background Art

[0002] The axial positioning device is a device installed on the lathe spindle and chuck, which is used to assist the chuck in clamping and positioning the axial parts, overcoming the problems of low concentricity, poor straightness, low clamping efficiency and instability caused by deformation of parts when processing shaft parts on the original lathe.

[0003] The axial positioning device is set on the hollow chuck and spindle of the lathe. The shaft parts are inserted into the hollow chuck and the spindle, and finally the shaft parts are fixed and positioned by the claws of the chuck. This method requires repositioning the tool and repeated measurement of dimensions when processing shaft parts. The use of universal positioning is likely to cause excessive clearance between the workpiece and the spindle, which may cause swinging and affect the accuracy of the parts. This will lead to a long processing cycle, low production efficiency, low output, and is not convenient for mass production of parts. Utility Model Content

[0004] The purpose of the utility model is to provide a workpiece axial positioning device which is convenient for positioning processing in view of the above problems existing in the prior art.

[0005] The utility model can be implemented through the following technical scheme: a workpiece axial positioning device, including a main body, a main shaft is installed in the main body, a pulling tube is installed in the main shaft, a hollow oil cylinder is installed at one end of the pulling tube, a connecting plate is provided between the hollow oil cylinder and the pulling tube, a hollow chuck is provided at the other end of the pulling tube, an installation groove is opened on the hollow chuck, a positioning sleeve is installed in the installation groove, and a processing part is installed in the positioning sleeve.

[0006] In the above-mentioned workpiece axial positioning device, the inner diameter of the positioning sleeve is equal to the maximum outer diameter of the processed part.

[0007] In the above-mentioned workpiece axial positioning device, a tapered sleeve is installed at the end of the positioning sleeve, a tapered hole is opened on the tapered sleeve, and a Morse center is installed in the tapered hole.

[0008] In the above-mentioned workpiece axial positioning device, a positioning groove is provided on the hollow chuck, and a corresponding positioning disk is provided on the positioning sleeve.

[0009] In the above-mentioned workpiece axial positioning device, three cutting edges are evenly spaced on the positioning disk, and positioning holes are distributed between the cutting edges.

[0010] In the above-mentioned workpiece axial positioning device, a screw hole is provided on the tapered sleeve.

[0011] In the above-mentioned workpiece axial positioning device, a connecting disk is provided between the main body and the hollow chuck, and the connecting disk is clamped with the hollow chuck.

[0012] In the above-mentioned workpiece axial positioning device, a telescopic rubber tube is provided on the pulling tube, and the telescopic rubber tube is fixed between the main body and the receiving plate.

[0013] Compared with the prior art, the utility model has the following advantages: a locating sleeve is installed in the hollow chuck and the spindle, a tapered sleeve is installed at the tail of the locating sleeve, and a Morse center is installed in the tapered sleeve. After the part is loaded into the locating sleeve, preliminary positioning is performed through the contact between the locating sleeve and the part, and then precise positioning is performed through the center. The pulling cylinder is driven by the hollow oil cylinder, and finally the hollow chuck is driven to complete the precise clamping of the part. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a stereoscopic view of the workpiece axial positioning device;

[0015] Figure 2 It is a cross-sectional view of the workpiece axial positioning device;

[0016] Figure 3 It is a front view of the positioning sleeve of the workpiece axial positioning device;

[0017] Figure 4 It is a cross-sectional view of a positioning sleeve of a workpiece axial positioning device;

[0018] Figure 5 yes Figure 2 Enlarged view of the inner circle A;

[0019] Among them, 1. main body; 11. connecting plate; 2. main shaft; 3. pulling tube; 4. hollow cylinder; 5. connecting plate; 6. hollow chuck; 61. mounting groove; 62. positioning groove; 7. positioning sleeve; 71. positioning plate; 711. cutting edge; 712. positioning hole; 8. processed parts; 9. taper sleeve; 91. tapered hole; 92. Morse center; 93. screw hole; 10. telescopic rubber tube. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0021] like Figures 1 to 5As shown, the utility model can be implemented through the following embodiments: a workpiece axial positioning device includes a main body 1, a main shaft 2 is installed in the main body 1, a pulling tube 3 is installed in the main shaft 2, a hollow oil cylinder 4 is installed at one end of the pulling tube 3, a connecting plate 5 is arranged between the hollow oil cylinder 4 and the pulling tube 3, a hollow chuck 6 is arranged at the other end of the pulling tube 3, a mounting groove 61 is opened on the hollow chuck 6, a positioning sleeve 7 is installed in the mounting groove 61, and a processing part 8 is installed in the positioning sleeve 7.

[0022] The hollow cylinder 4 is connected to the pull tube 3, and the translation and rotation of the pull tube 3 are controlled by the hollow cylinder 4. The connecting plate 5 is used to connect or disconnect the hollow cylinder 4 and the pull tube 3, so that when the main shaft 2 is working, the hollow cylinder 4 does not affect the rotation of the main shaft 2; the positioning sleeve 7 is used to calibrate the position of the processing part 8 to achieve precise fixation of the processing part 8 by the hollow chuck 6.

[0023] like Figure 2 and Figure 5 As shown, the inner diameter of the positioning sleeve 7 is equal to the maximum outer diameter of the processed part 8. The maximum outer diameter of the processed part 8 contacts the positioning sleeve 7, and the positioning sleeve 7 fills the gap between the shaft part and the spindle 2 to prevent the processed part 8 from swinging when the spindle 2 rotates and affecting the accuracy of the finished part.

[0024] like Figure 2 and Figure 4 As shown, a tapered sleeve 9 is installed at the end of the positioning sleeve 7, and a tapered hole 91 is opened on the tapered sleeve 9, and a Morse center 92 is installed in the tapered hole 91. The end of the positioning sleeve 7 prevents the tapered sleeve 9 and installs the Morse center 92, and the end of the processed part 8 is inserted into the Morse center 92, so that the processed part 8 and the positioning sleeve 7 tend to be concentric, thereby improving the processing accuracy.

[0025] like Figure 2 and Figure 5 As shown, the hollow chuck 6 is provided with a positioning groove 62, and the positioning sleeve 7 is provided with a corresponding positioning disc 71. The positioning disc 71 is installed in the positioning groove 62, and the positioning disc 71 is conveniently fixed in the positioning groove 62 by a connecting piece, so that the positioning sleeve 7 rotates with the main shaft 2.

[0026] like Figure 3 As shown, three cutting edges 711 are evenly spaced on the positioning plate 71, and positioning holes 712 are spaced apart on the positioning plate 71. Connectors are inserted into the positioning holes 712 to connect the positioning plate 71 to the hollow chuck 6. The cutting edges 711 leave a gap between the positioning plate 71 and the positioning groove 62, which is convenient for removal and replacement.

[0027] like Figure 4 As shown, a screw hole 93 is provided on the taper sleeve 9. The screw hole 93 is used to install a bolt into the taper sleeve 9, and is used to connect the taper sleeve 9 and the positioning sleeve 7, so as to facilitate the replacement of the taper sleeve 9 and the Morse center 92.

[0028] like Figure 1 and Figure 2 As shown, a connecting disk 11 is provided between the main body 1 and the hollow chuck 6, and the connecting disk 11 is clamped with the hollow chuck 6. The connecting disk 11 is used to connect the main body 1 and the hollow chuck 6, so that the hollow chuck 6 is connected to the connecting disk 11 after being pulled by the pull tube 3, and then driven to rotate by the pull tube 3, so as to complete the clamping of the claw to the processing part 8.

[0029] like Figure 1 and Figure 2 As shown, a telescopic rubber tube 10 is provided on the pull tube 3, and the telescopic rubber tube 10 is fixed between the main body 1 and the receiving plate 5. When the pull tube 3 is pulled by the hollow oil cylinder 4 and contacts with the outside world, impurities may be mixed in during movement, and the telescopic rubber tube 10 can effectively prevent impurities from entering the main body 1.

[0030] The working principle of the utility model is as follows: the Morse center 92 is installed into the taper sleeve 9, and then the taper sleeve 9 is fixedly connected to the positioning sleeve 7 by bolts, and then the positioning sleeve 7 is installed into the hollow chuck 6 and extended into the main shaft 2, and after the positioning plate 71 is fixed in the positioning groove 62, the hollow cylinder 4 is started, the pull tube 3 is pulled backward, and the hollow chuck 6 and the positioning sleeve 7 are driven to move backward. After the hollow chuck 6 and the connecting plate 11 are clamped, the hollow cylinder 4 moves the claws on the hollow chuck 6 through the pull tube 3, so that the claws accurately clamp the processed part 8.

[0031] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0032] Although various terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A workpiece axial positioning device, comprising a main body (1), wherein a main shaft (2) is installed in the main body (1), characterized in that: A pull tube (3) is installed in the main shaft (2), a hollow oil cylinder (4) is installed at one end of the pull tube (3), a connecting plate (5) is provided between the hollow oil cylinder (4) and the pull tube (3), a hollow chuck (6) is provided at the other end of the pull tube (3), a mounting groove (61) is provided on the hollow chuck (6), a positioning sleeve (7) is installed in the mounting groove (61), and a processing part (8) is installed in the positioning sleeve (7).

2. A workpiece axial positioning device according to claim 1, characterized in that: The inner diameter of the positioning sleeve (7) is equal to the maximum outer diameter of the processed part (8).

3. A workpiece axial positioning device according to claim 1, characterized in that: A tapered sleeve (9) is installed at the end of the positioning sleeve (7), a tapered hole (91) is formed on the tapered sleeve (9), and a Morse tip (92) is installed in the tapered hole (91).

4. A workpiece axial positioning device according to claim 1, characterized in that: The hollow chuck (6) is provided with a positioning groove (62), and the positioning sleeve (7) is provided with a corresponding positioning disk (71).

5. A workpiece axial positioning device according to claim 4, characterized in that: The positioning plate (71) is provided with three cutting edges (711) at even intervals, and positioning holes (712) are distributed between the cutting edges (711).

6. A workpiece axial positioning device according to claim 3, characterized in that: The tapered sleeve (9) is provided with a screw hole (93).

7. A workpiece axial positioning device according to claim 1, characterized in that: A connecting disk (11) is provided between the main body (1) and the hollow chuck (6), and the connecting disk (11) is clamped with the hollow chuck (6).

8. The workpiece axial positioning device according to claim 1, characterized in that: The pull tube (3) is provided with a telescopic rubber tube (10), and the telescopic rubber tube (10) is fixed between the main body (1) and the receiving plate (5).

Images