SU1743705A1 - Tailstock - Google Patents

Abstract

The invention relates to the field of machine tools and can be used in the tailstock of machine tools. The aim of the invention is to improve the accuracy of the centering of the quill at its clamp. In the front part of the housing there is an outer ring of the radial ball bearing. The inner ring is mounted on the quill. A one-piece expanding spring is installed in the recess of the housing, which with one stop rests on the inner ring of the bearing, and with other stops rests on the bottom of the recess. When the center is pressed against the end of the part, additional deformation is created in the rolling elements of the bearing, causing the rings to skew until a quill – bearing –– hole of the housing is created in the joint. 3 wi.

Description

The invention relates to the field of machine tools and can be used in the tailstock of machine tools.

The aim of the invention is to improve the accuracy of the centering of the quill at its clamping.

FIG. 1 shows the front part of the headstock in the section; figure 2 - diagram of the tilt of the bearing rings; Fig. 3 - one-piece spring.

The tailstock contains a housing 1, in the front part of which there is a step notch 2 in which the outer ring 3 of the radial ball bearing 4 is placed. The inner ring 5 is mounted on the pin 6. In the recess 7 of the housing there is an expandable spring 8 which is concentrically arranged by three stops 9 , 10, 11 is supported on the inner ring of the bearing, and on the right side by stops 12, 13, 14 rests on the bottom of the recess 7. In the case cover 15 there is an annular notch 16. The cover 15 is fixed to the body of the tailstock with screws 17

Back grandma works as follows

When assembling the tailstock, a bearing 4 is inserted into the recess 2 of the housing 1. The pressure screws 17 of the cover 15 are clamped to the full. The upper bearing ring 3 moves to the right, and the spring 8 is compressed, resting with three stops 9-11 against the end of the inner bearing ring, to a height deflection H equal to the length of the working part of the screw 17, and stops 12-14 into the bottom of the recess of the housing 1. In this state, the bearing balls are compressed in the K direction, and in the pinhole system there is a gap of optimal size due to the angles of the bearing And D resulting in adki bearing are adjusted to Opt.

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When turning the part in the centers, the center rests on the part fixed in the cartridge of the headstock, and the case 1 of the tailstock is locked. When the center is pressed to the part, the tailstock case is pulled back, creating additional deformation in the rolling bodies with distortions of the bearing surfaces in the rings 3 and 5 of the bearing 4 until the quill 6 is completely locked with a negative gap, i.e. Tension joint: quill - bearing - housing bore.

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Claims (1)

Claims of the invention A tailstock containing a quill mounted in the housing with mechanisms for its movement and clamping, is characterized in that, in order to improve the accuracy of centering the quill at its clamping, the quill clamping mechanism is designed as a radial thrust bearing. movement of the outer ring in the bore of the housing, and the inner ring on the quill, and one-piece expanding spring installed between the housing and the inner ring of the bearing. FIG. 7 FIG. 2 t Fig.Z