RU1816558C - Apparatus for two passes holes processing - Google Patents

Abstract

Usage: in the processing of metals by cutting. Summary of the invention: the device comprises a mandrel 2 fixed to the spindle 1. The latter is made in the form of a two shoulders lever, one shoulder 5 of which has a socket 6 for securing the drill, and the center 8 is made on the other shoulder 7. periodically in contact with the inclined surface 14 of the wedge 13, mounted in a quill 4. 4 il.

Description

Phage 1

00

with

SP SL 00

The invention relates to machine tool industry and can be used to treat holes with a drill with non-turning plates in two passes. Drilling is performed with forward feed, and boring with reverse feed.

The aim of the invention is to simplify designs and increase rigidity when drilling holes.

Figure 1 shows the proposed device in the working position when drilling holes, General view; figure 2 is a section aa in figure 1 (mandrel with elastic elements working on torsion when tilting the drill); in Fig.3 is a section in Fig.1; figure 4 - the device is in the working position when boring the hole, a General view.

The device comprises a mandrel 2 fixed on spindle 1 with two elastic elements 3 and a pin A located in front of the spindle 1. The elastic mandrel 2 is made in the form of a two shoulders lever, one shoulder 5 of which has a socket 6 for fixing the drill, and the other shoulder 7 contains a center 8 and cracker 9 with a supporting surface 10. The pin 4. comprises a sleeve 11 with a center hole 12 and a wedge 13 with an inclined surface 14. The rod 15 is attached to the sleeve 11 at one end and to the cylinder rod 16 with the other. To compensate for wear of the drill plates, sub-adjuster 17,

When pressure is applied to the cylinder 16, the pin 4 is moved towards the elastic mandrel 2 until the center hole 12 stops in the center 8 of the shoulder 7 of the elastic mandrel 2. In this position, the axis of the arms 5 and 7 of the elastic mandrel 2 and the drill axis are on the axis of rotation

spindle 1 in a fixed position, which increases the rigidity of the elastic mandrel 2 during drilling.

When pressure is applied to the other cavity 5 of the cylinder 16, the pin 4 moves in the opposite direction until the cylinder rod 16 abuts against the adjustable stop 18 of the sub-adjuster 17.

When moving the pintles 4, the inclined surface 14 of the wedge 13, in contact with the 10 supporting surface, rotates the shoulders 5 and 7 of the elastic mandrel 2 together with the drill around the axis H (Fig. 2) to obtain the required diameter of the hole during boring by reverse tool.

When turning the shoulders 5 and 7 around the axis I-I, the elements 3 of the mandrel 2 work on torsion.

Compared with the prototype, the inventive device is simpler and has increased rigidity when drilling holes.

Claims (1)

The claims A device for two-pass hole machining, comprising an elastic mandrel mounted on a spindle, made in the form of a two-shouldered lever, and a pinol placed in the spindle, wherein at least one supporting surface is made on one of the mandrel arms, which is designed to interact with at least one inclined surface made on pintles, moreover, in order to simplify the design of the device and increase its accuracy, a center is made at the end of the mentioned shoulder, and a center hole is made at the end of the pintles stie, which surface is intended for periodic interaction with said center. fifteen twenty 25 thirty 35 Fi g. 2