SU921731A1 - Apparatus for producing thread forming tool - Google Patents

Description

I

The invention relates to the manufacture of metal-cutting tools — and can be used on thread-cutting machines in the manufacture of thread-forming tools, in particular raskatniki.

A device for manufacturing a thread-forming tool is known, which contains a main pattern of copying, which is installed with the possibility of interaction with the pusher of the cone grinding machine {1.

When machining on a known thread-cutting device, there is a distortion of the thread pitch at the point of transition from the intake part to the calibrator, and the distortion of the thread pitch reduces the tool life.

The purpose of the invention is to increase tool life.

The goal is achieved by the fact that the device is equipped with an additional copy ruler mounted for movement relative to

the main copying machine in order to build the pusher of the cone grinding machine, while the slope angle of the additional copying ruler is equal to half the angle of the main copying ruler.

FIG. Figure 1 shows the scheme for cutting the diaper along the outer diameter; in fig. 2 - the proposed device.

The device contains a main copier (Rule 1, in contact with the pusher 2 of the mechanism of cone grinding of the machine, -The angle of inclination of the main claw-line is chosen in the cooTBeTcrrevm with the core of the pick-up part of the ripper 3.

15, the main copier ruler 1 is mounted with the possibility of translational movement in the direction of the pusher 2, an additional set ruler 4, for moving it along the key 5 on

20, it has a micrometric screw 6 with a limb 7. The slope angle of the complementary1 copier ruler is equal to half the angle of the main copy of the lteyka. The basic copier pine 1 is attached to the machine stele (not shown) along with an additional copier 4. The processing of the rolling mill is carried out with a grinding wheel 8,

The device works as follows.

When the raskatnik 3 is milled on the tops of the turns by grinding wheel 8, the intake tool is first processed. At this time, the main index bar 1 with the machine table and the drift 3 moves from left to right. The pusher 2 contacts the profile of the main pattern of the ruler 1, the contact is maintained until the top of the transition coil is open; kets opposite the grinding wheel 8. In this position, the pusher 2 comes into contact with an additional copy ruler; 4, The contact of the pusher with the additional cam line 4 will continue until the spreading stick moves axially in the axial direction by the value of the thread pitch. Further processing will take place according to the law set by the grinding wheel with an 8 locking cam of a thread grinding machine (not shown).

When the machine is changed over to the processing of the raskatnik with a different thread pitch, the additional lug 4 is shifted in the direction of the pusher 2 by the required

Iv1G41shu, Moving is carried out by turning the screw 6.

The supply of the device with an additional copier ruler allows machining of thread-forming tools with less distortion of the thread pitch, which increases the service life.

Claims (1)

Invention Formula A device for manufacturing a thread-cutting tool, comprising a main pattern of copying, mounted with the possibility of interacting with a pusher of a cone grinding mechanism, characterized in that, in order to increase the durability of the inst. The device is equipped with an additional copying ruler, mounted with the ability to move relative to the main copying ruler in the direction of the taper grinding machine pusher mechanism, while the slope angle of the additional copying ruler is equal to half the slope angle of the main copying ruler. Sources of information, prikltye into account in the examination 1, Zhipischky, S.I., et al. A tool for puncturing threads in holes. Machines and tools, 1965, No. 10, p. 29. FIG. I