SU1685620A1 - Boring bar - Google Patents

Description

one

(21) 4704111/08

(22) 12.06.89

(46) 2,3.10.91. Bul. No. 39

(72) N.I. Vetrov and G.V. Shtennikov

(53) 621.941.2 (088.8)

(56) USSR Copyright Certificate No. 222125, cl. B 23 B 29/034, 1966.

(54) BORROUND FRAME

(57) The invention relates to the machining of metals by cutting and can be used when cutting holes. The aim of the invention is to improve the accuracy

by implementing a two-step setup. The tool holder 3 is installed in the housing 1, on which the wheel 8 with two flanges of different diameters is installed, interacting with screws 9 and 10. The coarse adjustment is carried out by rotating the screw 10 in large increments. The fine tuning is done by a screw 9 with a smaller pitch. By increasing the radius of the pitch circle and decreasing the pitch of the screw, a high sensitivity of the mandrel is achieved and the fine tuning of the cutter 4 is achieved.

The invention relates to metal cutting and can be used for bore holes.

The aim of the invention is to improve the accuracy of the implementation of a two-stage tuning.

Figure 1 - presents a longitudinal section of the mandrel; figure 2 - section aa in figure 1; on fig.Z - section BB in figure 1; figure 4 is a view along arrow B in figure 2.

Inside the housing 1, the sleeve 2 is pressed into the axial opening of the housing 1, a tool holder 3 is inserted, having in the front part an elastic flange 4 clamped by a nut 5. In the front part of the tool holder 3 there is an axial hole in which the cutter 6 is inserted, which is fixed with screws 7.

On the middle cylindrical part of the tool holder 3 there is a gear wheel 8 with two crowns, diametrically located at different radii from the axis of the tool holder 3. With a gear wheel 8

two worms 9 and 10 interact with scales 11 on the end. The constant tension of the screws 9 and 10 is carried out by the spring 12 and the screw 13. The tail part of the tool holder 3 is made in the form of a flat spring 14 the end of which is fixed in the sleeve 2.

The device worked as follows.

The coarse adjustment is carried out by rotating the screw 10 with a large pitch. At the same time, the gear wheel 8, with the help of a small radius gear that interacts with the screw 10, makes a swinging movement, shifting relative to the point of the screw of the screw 9 with the gear rim of transverse direction, causing the tool holder shank to deflect and, as a result, movement of the tool bit tip in the direction indicated by the arrows.

Fine tuning is accomplished by disabling the screw 9 with a smaller step ripi, which is the gear wheel 8 by means of a pin

(L

WITH

oh oh oh oh oh oh

the larger rim of the larger radius of the simulator with the worm 9 rotates, shifting relative to the worm gearing point of 10 g with a toothed rim of a smaller radius in the transverse direction, causing the tool shank to deflect and move the tip of the tool.

Claims (1)

Claims of the invention A boring mandrel comprising a housing with a tool holder housed therein, the front part of which, bearing the cutter, is made in the form of an elastic flange, and from the tails in the form of a flat spring, / 12 sprinkled in the case, different from that chgo. in order to improve accuracy by implementing a two-step tuning, the mandrel is provided with a wheel with two oppositely made gear rims of different diameters and two worms installed in the housing and designed to interact with the said gear rims, and the screw wed engaging with the larger diameter rim, made with a smaller pitch than the screw to engage with a crown of smaller diameter, and the wheel is mounted on the tool holder in its middle part. UchuULLH V OLJiU A- W Phie.1 AT Fie.2 FIG. J MB Phie. i