SU1209372A1 - Mandrel - Google Patents

Description

The invention relates to metal cutting, in particular mandrels for mounting and securing replaceable boring heads, and can be used in machining holes.

The purpose of the invention is to increase the durability of the mandrel due to the unloading of the screw from the bending moment,

Figure 1 shows onpaaKa, section; 2 is a view A of FIG. 1.

The mandrel consists of a body 1 with a supporting end 2. On the left side

housing 1 is made protrusion type las -

point tail for mounting boring heads on it. In the longitudinal opening 3 of the housing 1 is placed on a sleeve 4 with a flange 5 for fixing the boring heads by surfaces 6. In the sleeve 4 there is a transverse hole 7 in which screw 8 is placed, and housing 1. The corrections are made with a transverse hole 9, the diameter of which is larger than the outer diameter of the threaded part of the screw 8. On the cylindrical part of the sleeve 4 there is a longitudinal groove H with wall 11 to accommodate a flat, curved

In and

springs 12, which at one end abuts against the wall 11 of the longitudinal groove lb ,, and with the second end against the wall of the annular groove 13, made in the longitudinal opening 3 of the housing 1о. The flat spring 12 with its convex part abuts against the end of the screw 8. In the longitudinal opening 3 of the housing 1 mandrel mounted coil spring 14 compression.

The mandrel works as follows.

When the screw 8 is pressed, the flange of the sleeve 4 under the action of the compression spring 14 occupies the initial position and the supporting surface of the housing 1, as well as the surfaces 6 {of the trench of the sleeve 4 are freed to install the boring head.

After mounting the boring head 15 on the dovetail of the mandrel body 1, the screw 8 is screwed and presses against the convex part of the flat spring 12 with its end. on the mandrel.

12

Editor M.Blanar

fig.g

Compiled by S.Ver Tehred S.Migunova

Order 364/17 Circulation 1000 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d, 4/5

Branch PPP Patant, Uzhgorod, st. Project, 4

Proofreader G. Reshetnik

Claims (1)

A mandrel comprising a housing, in the longitudinal opening of which the direction is a sleeve with a flange and a screw, characterized in that, in order to increase durability, the mandrel is provided with a curved flat spring, and a longitudinal groove and an annular groove are respectively made on the sleeve and in the opening of the housing, the flat spring is installed in the groove of the sleeve with the possibility of interaction with its opposite ends with the surfaces of the groove and grooves, and the screw is installed in the sleeve with the ability to interact with the curved part of the flat spring loaded in axial guine.