SU944901A1 - Apparatus for knurling lift guides - Google Patents

Description

(54) DEVICE FOR ROLLING GUIDES

ELEVATOR

one

The invention relates to mechanical engineering, namely, mechanical processing, and can be used for finishing and strengthening processing of elevator guides by surface plastic deformation.

Known devices for rolling elevator guides mounted on the spindle head of a longitudinal milling machine and containing a base with knurled heads mounted in pairs on both sides of the axis of the machine spindles of the machine, in the casing of which the holders of the rolling rollers 1 are installed.

A disadvantage of the known devices is the low quality of processing due to the inadequacy of the processing force of the instability of the rolling process.

The purpose of the invention is to improve the quality of processing.

This is achieved by the fact that the axis of rotation of each holder of the knurled roller is shifted towards the working stroke from the plane passing through the line of contact of the roller with the surface being processed and perpendicular to the latter, while the device is equipped with springs fixed to the hinge heads and designed to return holders to the starting position.

FIG. 1 shows the device, view in

 plan; in fig. 2 shows section A-A in FIG. 1. The device consists of four rolling heads G-4 installed in the spindle head of the machine in pairs on both sides with respect to face mills 5 and 6. In each rolling head there is a deforming roller 7 installed in the rotary holder 8, the stop 9 and the return spring 10. A force ne deforming roller is created by cup springs 11.

Each knurled head consists of a base 12 connected to the flange 13 by means of skalok 14. In flange 13 there is a housing 15, in the bores of which on one axis 16 there is a support roller 17 and on the bearing 18 a holder 8.

The intermediate roller 19 is cantilevered in the holder, and the deforming roller 7 is fixed in the fixed separator 20.

A cylindrical pin 21 is located on the axis of the head, so the roller 7 is able to self-align in a plane perpendicular to the surface to be treated.

To hold the roller in the working position, a stop 9 is installed on the body, and a spring 10 is provided for returning the roller to the working position.

To prevent the deforming roller from spontaneously coming out of contact with the surface to be machined, the axis of rotation of each holder is shifted towards the working stroke from the plane passing through the line of contact of the roller with the surface to be processed and perpendicular to the latter. The magnitude of the displacement e is 3-5 mm. The presence of displacement causes the tangential component of the deforming force, which presses the holder against the stop, thereby preventing the roller from spontaneously coming out of contact with the treated surface.

The device works as follows.

When the spindle head is communicated, the feed movement (for example, in the direction indicated in Fig. 1 by the arrow), the deforming rollers 7 of the heads I and 2, together with the holders 8 and the intermediate rollers, are moved apart by the workpiece by a double allowance 2t. In this case, the holders rotate around the axis O at a certain angle, in the direction opposite to the direction of movement of the spindle head, and roll without force on the raw side surfaces of the workpiece. After the end mills 5 and 6 come into operation, which remove the 2t allowance from the two sides of the workpiece, the deforming rollers 7 of heads 3 and 4, in which the holders 8 are spring 10 pressed against the stop 9. The rollers will roll the machined surfaces with the force generated by the pre-compressed springs 11.

At the end of the processing of the rollers 7 out of contact with the workpieces, the holders 8 together with the deforming rollers 7 under

the action of return springs returns to its original (operational) position, come to abutment 9.

After the installation of the new workpiece and the message of the spindle head in the opposite direction, the rolling heads will work in the reverse order.

The use of the proposed device allows an increase in labor productivity due to a significant reduction in the auxiliary time associated with each movement of the spindle head with manual retraction of the deforming rollers to the non-working position of one pair of heads and setting the rollers to the working position with a certain effort to deform another pair of heads. In addition, due to the constant deformation force during the processing of each lift guide, the quality of the treated surface is improved.

Claims (1)

Invention Formula A device for rolling elevator guides, located on the spindle head of a longitudinal milling machine and containing a base with knurled heads installed in pairs on both sides of the axis of the spindles of the machine, in the casing of which the holders of the rolling rollers are installed, which are distinguished by the fact that , in order to improve the quality of processing, the axis of rotation of each holder is shifted towards the working stroke from the plane passing through the line of contact of the roller with the surface to be treated and perpendicular to the last days, the device is provided with a spring fixed to the housing and the rolling heads intended for holders return to the original position. Sources of information taken into account during the examination 1. Combined machining and pressure of the heads of passenger elevator guides. Information leaflet TsNITEStroymash, № 277, 1967.