CN-224222755-U - Positioning device for lathe machining

CN224222755UCN 224222755 UCN224222755 UCN 224222755UCN-224222755-U

Abstract

The utility model relates to the technical field of lathe equipment, in particular to a positioning device for lathe machining, which comprises a taper sleeve, wherein the taper sleeve is arranged in a spindle taper hole of a lathe shell, axial force is applied to the workpiece through an adjusting screw rod arranged in the taper sleeve to realize axial positioning of the workpiece, the problem of axial movement in the turning and cutting processes is solved, the machining precision is improved, the length of the workpiece is prolonged, the outer conical surface of the taper sleeve is consistent with the taper of the spindle taper hole of the lathe shell, interference fit is adopted to absorb the axial force, the adjusting screw rod comprises a thread section and a smooth surface section, the end head of the adjusting screw rod is provided with a positioning end face, and one end of the taper sleeve is provided with a circular positioning hole. In the positioning device for lathe machining, the taper sleeve is arranged in the taper hole of the main shaft of the machine tool shell, and axial force is applied by the adjusting screw, so that stable axial positioning of a workpiece in the machining process is realized. The design effectively solves the problem that the workpiece is easy to axially move in the turning, cutting and other operations of the traditional positioning device.

Inventors

MENG QINGYOU
YE TULIANG
LIU HUAQING
WU JIANWEI
FANG JIANSHAN
HE SHIFA

Assignees

衢州元立金属制品有限公司

Dates

Publication Date: 20260512
Application Date: 20250423

Claims (6)

1. The positioning device for lathe machining comprises a taper sleeve (1) and is characterized in that the taper sleeve (1) is arranged in a spindle taper hole (51) of a machine tool shell (5), axial force is applied to the positioning screw (3) arranged in the taper sleeve (1) to realize axial positioning of a workpiece (8), the problem of axial movement in turning and cutting processes is solved, machining precision is improved, the length of the workpiece (8) is prolonged, the outer conical surface of the taper sleeve (1) is consistent with the conical degree of the spindle taper hole (51) of the machine tool shell (5), interference fit is adopted to absorb axial force, the adjusting screw (3) comprises a threaded section (31) and a smooth surface section (32), a positioning end face (33) is arranged at the end head of the adjusting screw (3), and a circular positioning hole (11) is formed in one end of the taper sleeve (1) and used for positioning the adjusting screw (3).
2. The positioning device for lathe machining according to claim 1, wherein a nylon fixing sleeve (2) is arranged at the step of the taper sleeve (1), threads are arranged in an inner hole of the nylon fixing sleeve (2), and a step in interference fit with the taper sleeve (1) is arranged on the outer portion of the nylon fixing sleeve.
3. The positioning device for lathe machining according to claim 2, wherein the adjusting screw (3) is in threaded fit with an inner hole of the nylon fixing sleeve (2), a hexagonal nut (4) is connected to a threaded section (31) of the adjusting screw (3) in a threaded manner, the length of the workpiece (8) is prolonged by adjusting the distance between a positioning end face (33) of the adjusting screw (3) and the end portion of the nylon fixing sleeve (2), and the workpiece is locked and fixed through the hexagonal nut (4) after adjustment is completed.
4. A positioning device for lathe machining according to claim 1, characterized in that the end of the machine tool housing (5) close to the workpiece (8) is provided with a chuck (6) and a self-centering jaw (7).
5. The positioning device for lathe machining according to claim 1, wherein a spindle straight hole (52) is provided at an end of the machine tool housing (5) away from the spindle taper hole (51).
6. The positioning device for lathe machining according to claim 1, wherein the positioning hole (11) is matched with the size of a smooth surface section (32) of the adjusting screw (3).

Description

Positioning device for lathe machining Technical Field The utility model relates to the technical field of lathe equipment, in particular to a positioning device for lathe machining. Background In the lathe machining process, the positioning accuracy of a workpiece directly influences the quality and the machining efficiency of the workpiece. Conventional lathe positioning devices typically employ simple clamping mechanisms or dowel pins to secure and position the workpiece. However, these conventional approaches often have drawbacks in coping with longer workpieces or scenes requiring high precision machining. Specifically, the conventional positioning device may not be capable of effectively preventing axial movement of the workpiece during processing, and particularly during turning, cutting and other operations, the movement may cause degradation of the surface quality of the workpiece, difficulty in ensuring the dimensional accuracy, and even may cause safety accidents such as workpiece flying. In addition, when the length or the positioning position of a workpiece is adjusted by the traditional positioning device, the operation is relatively complicated, long time is required to be consumed, and the processing efficiency is reduced. Disclosure of utility model The utility model aims to provide a positioning device for lathe machining, which solves the problems that the traditional positioning device provided in the prior art can not effectively prevent axial movement of a workpiece in the machining process, particularly when the operations such as turning and cutting are performed, the movement can cause the reduction of the surface quality of a workpiece, the dimensional accuracy is difficult to ensure, and even safety accidents such as workpiece flying-out and the like can be caused. In order to achieve the above purpose, the utility model provides a positioning device for lathe machining, which comprises a taper sleeve, wherein the taper sleeve is arranged in a spindle taper hole of a machine tool shell, axial force is applied to the taper sleeve through an adjusting screw rod arranged in the taper sleeve to realize axial positioning of a workpiece, the problem of axial movement in the turning and cutting processes is solved, the machining precision is improved, the length of the workpiece is prolonged, the taper of an outer conical surface of the taper sleeve is consistent with that of the spindle taper hole of the machine tool shell, interference fit is adopted to absorb the axial force, the adjusting screw rod comprises a thread section and a smooth surface section, a positioning end face is arranged at the end head of the adjusting screw rod, and a circular positioning hole is formed at one end of the taper sleeve and is used for positioning the adjusting screw rod. Preferably, a nylon fixing sleeve is arranged at the step of the taper sleeve, threads are arranged in an inner hole of the nylon fixing sleeve, and a step in interference fit with the taper sleeve is arranged outside the nylon fixing sleeve. Preferably, the adjusting screw is in threaded fit with an inner hole of the nylon fixing sleeve, a hexagonal nut is in threaded connection with a threaded section of the adjusting screw, the length of the workpiece is prolonged by adjusting the distance between the positioning end face of the adjusting screw and the end portion of the nylon fixing sleeve, and the adjusting screw is locked and fixed through the hexagonal nut after adjustment is completed. Preferably, the end of the machine tool housing close to the workpiece is provided with a chuck and a self-centering jaw. Preferably, a main shaft straight hole is formed in one end, far away from the main shaft taper hole, of the machine tool shell. Preferably, the positioning hole is matched with the size of the smooth surface section of the adjusting screw. Compared with the prior art, the utility model has the beneficial effects that: In the positioning device for lathe machining, the taper sleeve is arranged in the taper hole of the main shaft of the machine tool shell, and axial force is applied by the adjusting screw, so that stable axial positioning of a workpiece in the machining process is realized. The design effectively solves the problem that the workpiece is easy to axially move in the operations of turning, cutting and the like of the traditional positioning device, and the surface quality and the dimensional accuracy of the workpiece are obviously improved. The outer conical surface of the taper sleeve is in interference fit with the main shaft taper hole of the machine tool shell, so that axial force can be absorbed, and the positioning stability is further enhanced. Meanwhile, the axial force is applied more accurately and controllably due to the design of the adjusting screw, so that the overall machining precision is improved. The distance between the positioning end face of the adjusting screw and the end part of the nylon