SU996175A1 - Tool for finishing small-diameter holes - Google Patents

Description

(54) TOOL FOR FINDING HOLES OF SMALL DIAMETERS

one

The invention relates to the machining of precision orifice diameters in various products.

A known tool for finishing holes of small diameters, containing a holder with an elastic element j iT fixed therein.

However, during operation, such a tool contacts the surface to be treated with bounded (working) sections of the hinge, and the tool’s design excludes the possibility of using a hinge around the entire perimeter, which speeds up the hinge wear and reduces the tool durability.

The aim of the invention is to increase the durability of the tool.

The goal is achieved by the fact that the holder has shaped grooves designed to secure one or more elastic elements made closed,

Free placement of the spring in the figured grooves of the holder provides

the possibility of spontaneous (auto. matic) movement of the spring during processing due to vibrations and frictional forces arising between the surface to be treated and the spring. In case of insignificant or no movement, as the working areas wear out, the spring is forcedly (after the termination of processing) is moved in the pressing grooves by the required amount, thus ensuring uniform wear along the entire perimeter.

In addition, it is possible to quickly replace the spring. The spring, made in the form of a ring, is technologically advanced in manufacture and repair. Performing a tool with several pruad us increases tool life and improves machining performance.

20

FIG. 1 shows the proposed instrument, a general view of FIG. 2 is a view A of FIG. one; in fig. 3 and 4 - examples of the implementation of shaped grooves in the holder

tool; in fig. 5 - spring, made in the form of a ring; Fig, 6 section BB in Fig, 3.,

The tool contains a spring 1, made in the form of a loop, the free ends of which are interconnected (for example, by welding). The spring can be made in the form of a ring. In this case, it is technological in manufacture and repair,

Spring 1 freely placed in

shaped grooves 2 holders 3. Spring, 1 can be deformed (within. elastic deformation) in the transverse direction, taking an oval shape, while its dimensions in the longitudinal direction (along the tool axis) increase and then it is inserted and fixed in the figure grooves of the holder, assuming an oval shape, wherein the transverse dimensions of the spring 1 are larger than the diameter of the machined hole, taking into account the machining allowance and providing the necessary pressure on the machined surface of the part 4,

Paei 2 can be made at an angle about the axis of the holder (see FIG. 2), I or figured, as shown in FIGS. 3 and 4, but in any case form a lock preventing the rod from falling out when the tool is working.

The holder 3 can be provided with several springs (see Fig. 2 and FIG. 4) or with one (see Fig 2). Bestow only the springs increase the durability of the tool and increase the machining productivity.

The configuration and dimensions of the shaped grooves and springs are chosen so as to ensure the necessary pressure on the surface to be treated due to the elastic properties of the springs.

The tool works as follows.

The tool is fixed in the machine spindle, rotation and reciprocating movement is reported. When the tool enters the part 4, the spring 1 is compressed in the transverse direction, due to the elastic properties of the required pressure on the work surface. During compression, the spring sizes increase in the longitudinal (along the tool axis) in the alphabet, as a result of which a small gap 5 (see, Fig 3) is formed between the spring and the bottom of the figured grooves, which contributes to the resulting surface and the spring, the slow movement of the spring in the shaped grooves. During processing, this contributes to uniform spring wear along the entire outer perimeter. At a slight movement speed, as the working sections wear, the springs are forcibly (after contempt processing) moved in the holder grooves by the required amount, thus ensuring uniform wear around the entire perimeter.

When the target size is reached, the processing is stopped, the tool is taken out of the part, the drive is switched off, the tool is pressed to its initial position

When the spring is fully worn, when the required pressure on the surface to be treated is reduced and the treatment capacity decreases, the springs are replaced.

The proposed design increases the tool life by 1.5–2 times in comparison with the known tool due to the use of a spring along the entire perimeter.

Claims (1)

Invention Formula A tool for finishing holes of small diameters containing a holder with an elastic element fixed therein, characterized in that, in order to increase the tool life, the holder has shaped grooves designed to accommodate one or more elastic tools made closed. Sources of information taken into account during the examination 1, the Federal Republic of Germany patent No. 24О3967. CL, 24 V 37 / O2, published. 1975. FIG. I ig.Z .4f ig.5 FIG. Bu0A. FIG. 1