RU1814986C - Boring head - Google Patents

Abstract

Usage: boring deep holes. SUMMARY OF THE INVENTION: A rotary ring 2 is mounted on the housing 1 of the bore of the head for engaging with the rollers of the rollers, one end of which is fixed in the housing. By rotating the ring 2, the feed amount is adjusted by setting the rollers 5 at a certain angle a. Then rotation of the workpiece is included. Due to friction forces between the rollers and the surface of the hole being machined, the self-feed of the head is realized. 3 sludge.

Description

The invention relates to the machining of parts and can be used for boring deep holes, for example tubes, with the axial feed of the boring head itself.

The aim of the invention is to increase the manufacturability of the process of boring deep holes by providing an axial working feed of the boring head itself, reducing the size of the equipment used and the production area.

.. FIG. 1 shows the proposed head in the working position, general view; on fig.2 .-. section AA in figure 1; in Fig.Z - section bB in Fig.1.

The boring head contains a cylindrical body 1 with a fixing element mounted on it in the form of a ring 2, centered between each other and having radially opposite pairs of oppositely located windows, in which there are 3 inserts, radially spring loaded with flat springs A. In the spherical openings of the 3 inserts arranged in pairs opposed to each other are spherical trunnions of the drive rollers 5, which are in contact with the treated surface during operation. The angular position of the housing 1 and the fixing element 2 mounted on it relative to each other is set using the vernier 6 and fixed with screws 7. At the front of the housing 1 there are cutting elements 8 and a sealing ring 9, which protects the contact zone of the rollers with the machined surface of the part from chips .

Boring head works as follows.

Immediately before processing, the head is adjusted to the required working feed S. This is done by installing the contact rollers 5 at a certain angle a by turning the housing 1 and the element 2 relative to each other. Accordingly. role axes: covs are offset relative to the axis of the head by an angle a. Moreover, the value of the angle ore by the value of the working feed S is related by the following relation:

9 L

where S is the value of the working feed, mm / rev. details;

D is the diameter of the bore hole, mm

Then, the shank 10 of the head is connected to the rod of a lathe (not shown), which protects the head from rotation and is seated in a sliding bearing on

a sliding key (not shown) centered on the axis of rotation of the part. After that, the bore head is inserted into the end of the part (for example, pipe) previously bored to the required diameter D

so that the rollers 5 located on the periphery of the head come into contact with the treated surface. The contact forces of the rollers 5 are determined by the leaf springs 4 located under the liners 3. From the moment the part starts to rotate, the rollers 5, turned at an angle a to the plane perpendicular to the axis of rotation, begin to run around the machined surface and the head receives constant motion along the axis of the part with the working feed speed S tg a w Р for one revolution of the part ..

The required adhesion of the rollers to the contact surface is achieved

due to the contact force of the latter using the corresponding stiffness of leaf springs 4, -. . -.

At the end of processing after stopping the rotation of the part, the head is removed from

rods. Compared with the prototype, the proposed head allows you to bore parts of almost unlimited length due to the fact that it does not require a special feed mechanism (support) and the corresponding

the appropriate length of the guides of the machine (bed). In addition, the required production space is reduced, which in the complex allows to obtain an economic:

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Claims (1)

The claims A boring head comprising a housing with cutting elements and guide rollers, each of which is mounted on the roller with the possibility of rotation relative to an axis intersecting the longitudinal axis of the head and the axis of rotation of each roller perpendicular to the last, and so on that, in order to expand field of application due to self-feeding of the head, it is equipped with a locking element made in the form of a ring mounted on the housing with the possibility of rotation and designed to interact with rollers, one end of which is fixed in the housing. 1814986 Aa ff-5 gtaVer # Ј / 0г0 Э3 5 3 //// J / L ////// (rig.2