Lathe used for turning long rod class of parts

Abstract

A lathe used for turning long rod class of parts comprises a lathe body, a cutter bar, a cutter bar clamping device, a clamping jaw type lathe center clamping device, a chuck and a motor, wherein the motor, the clamping jaw type lathe center clamping device and the cutter bar clamping device are fixed to the lathe body, and a main shaft of the motor is fixedly connected with the chuck; and the cutter bar clamping device comprises a horizontally arranged base, a cutter bar and a cutter bar sleeve, a positioning block protruding downwards out of the lower surface of the base is embedded in the bottom of the base, the base is fixedly connected with the cutter bar sleeve through a support base, the cutter bar sleeve is of a cylindrical structure, the central line of the cutter bar sleeve is horizontally arranged in the left and right direction, and a cylindrical mounting cavity is arranged in the cutter bar sleeve in the axial direction. The device is high in processing and turning precision, great in stability, low in defective rate and accurate in centering.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing equipment, and in particular relates to a lathe used for turning long rod parts. Background technique [0002] Lathe is the main equipment for mechanical processing. It mainly processes the surface of shaft parts and rotary processing methods such as drilling. Lathe processing has two processing forms: one is to fix the turning tool and process the formed workpiece during rotation; The first is to fix the workpiece, through the high-speed rotation of the turning tool, and the horizontal and vertical movement of the turning tool for precision machining. The lathe is mainly used for machining shafts, discs, sleeves and other workpieces with rotating surfaces. It is used in machinery manufacturing and repair factories. The widest type of machine tool processing; but when the lathe processes the deep hole inner circle of the workpiece, due to the small diameter of the workpiece and the l...

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Problems solved by technology

[0002] Lathe is the main equipment for mechanical processing. It mainly processes the surface of shaft parts and rotary processing methods such as drilling. Lathe processing has two processing forms: one is to fix the turning tool and process the formed workpiece during rotation; The first is to fix the workpiece, through the high-speed rotation of the turning tool, and the horizontal and vertical movement of the turning tool for precision machining. The lathe is mainly used for machining shafts, discs, sleeves and other workpieces with rotating surfaces. It is used in machinery manufacturing and repair factories. The widest type of machine tool processing; but when the lathe processes the deep hole inner circle of the workpiece, due to the small diameter of the workpiece and the large aspect ratio, the conventional tools on the lathe cannot realize deep hole processing; due to the depth of the hole, the processed tools are all If it is too long, the vibration of the tool cannot be avoided during the processing, and the stability of the processing will be reduced, which will cause damage to the workpiece, and the workpiece can only be replaced, which increases the operating cost;

[0003] In addition, the center frame currently used for machining long shafts on ordinary lathes and small CNC lathes uses a cast iron center frame to clamp the workpiece at three points. It needs to be manually adjusted at any time during processing to realize the clamping positioning in long shaft processing. The disadvantage of the cast iron center frame is that it needs to be adjusted every time a workpiece with a different diameter is processed, which is time-consuming and laborious, which reduces the efficiency of processing, and after manual adjustment, the centering accuracy is poor and the processing effect is poor; the patent application number is 2014200868679 The document "Electric Centering Center Frame for Lathes" and the patent document "Manual Centering Center Frames for Lathes" with application number 2014200868861 both introduce a kind of center frame for lathes. The structures of the two types of center frames for lathes are the same except for the driving mode. , which has the following defects: the clamping arm cannot clamp the workpiece, and the position of the clamping bearing on the lug pulley and the clamping bearing on the two clamping arms and the clamping point of the workpiece is a triangle, when the triangle is equilateral When it is a triangle, the clamping effect on the workpiece is the best. When the triangle is an obtuse triangle, the clamping effect on the workpiece is not very ideal, but when the size of the workpiece is different, it will inevitably cause the three clamping bearings to clamp the workpiece. An obtuse triangle formed by the position of the holding point, so the clamping effect is difficult to guarantee

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