SU1604577A1 - Honing head - Google Patents

Abstract

The invention relates to the treatment of blind holes by the method of honing. The purpose of the invention is to increase the durability of the tool by eliminating the jamming of its abrasive-resistant pads. For this, the honing head, made in the form of the body 1 with abrasive bars placed in its grooves, installed with the ability to interact with the cones 3 and 4 of the expanding rod 2, is provided with elastic elements 11. The latter are fixed between the abrasive bars 8 and the supporting elements 10, installed with the interaction with a movable cone 4 expansion rod. 1 hp f-ly, 2 ill.

Description

1

The invention relates to mechanical engineering and can be used in the machining of blind holes by the method of honing.

The purpose of the invention is to increase the durability of the jug-out by eliminating the jamming of abrasive-resistant pads.

Figure 1 shows a honing head. A general sectional view; Fig.2 is a section A-Anafig1.

The honing head comprises a housing 1, in which a compression rod 2 is located in the central opening, which has two cones — the upper 3 and the lower 4. At the same time, the lower cone 4 is movable relative to the upper cone 3. At the end of the rod 2 there is a helical spring 5 and an end stop 6. In case 1, pads 7 are installed, carrying abrasive bars 8, with supporting elements 9 and 10, the last of which interacts with a movable cone 4 by means of an elastic element 11, made in the form of two thin-walled

plates.

Honingovka head works as follows.

The head is inserted into the machined hole and is given a rotational and reciprocating motion. Axial movement of the expanding rod 2 carries the pads 7 to the bars 8 to the surface to be treated. When the end stop reaches the bottom of the hole, the spring 5 is compressed, acting with increasing force on the movable cone 4. The latter, moving upward, increases the pressure on the bars 8, which, in turn, rotate relative to the support element 9. As a result, the pressure of the bars increases In on the surface, which leads to the intensification of the removal of metal from it.

If upon further movement of the head to the bottom of the hole being machined, the value of the radial pressure of the bars on the workpiece will exceed the permissible conditions

if the bars are jammed, then the elastic elements 11 will be bent. At the same time, the movement of the head in the previous direction will not cause an increase in the pressure of the bars on the surface to be treated, and

consequently, the jamming and breakage of the jughead.

When the movement of the honing head is reversed, the spring 5 is expanded, the elastic elements 11 are straightened, the bars 8 occupy a position parallel to the axis of the hole, and the radial pressure along them is equalized.

Thus, the presence of elastic elements eliminates the danger of jamming

and breakage of the honing head when machining a blind hole.

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Claims (2)

Claim 1. Honing head, made in the form of a body with abrasive-bearing pads placed in its grooves, which are interoperable by means of supporting elements with expanding cones, one of which is movable in the axial direction and installed with the possibility of contact with a spring, that, in order to increase the durability of the hingolovka by eliminating the possibility of seizure of abrasive-resistant pads, the hingolovka is equipped with elastic elements fixed between abrasive pads and supporting elements installed with the possibility of interaction with the movable cone of the expanding rod. 2. A head according to claim 1, characterized in that the elastic element is made in the form of a thin-walled plate. A (poberiuts) eight one 0