SU791464A1 - Device for cutting helical grooves - Google Patents

Description

one

The invention relates to the processing of metals with chip removal, and more specifically to devices for cutting helical grooves.

A device for cutting helical grooves comprising a body, an emphasis for the part and a cutting head mounted in a guide sleeve {,

The aim of the invention is the expansion of technological capabilities.

This goal is achieved by the fact that the support is made in the form of a copier with screws, eight grooves on the outer cylindrical surface and mounted in a guide sleeve, which is provided with fingers with rollers that interact with the pairs of the copier, and an element that secures the copier from turning is installed in the case.

Figure 1 shows the device in section; figure 2 - section aa of figure 1; on fig.Z - section bb fkg, 1; figure 4 is a section bb In figure 1.

The device has a housing 1, which is fastened to the guide 2 and the shank 3 installed in the tool spindle of the longitudinal support of the multi-spindle machine or in the tailstock quill

turning or similar lathe. The guide 2 of the housing I has the ability to enter the longitudinal groove

4copier 5 and prevent its rotation relative to the body 1. Copier

5 is spring-loaded in the direction of supply by the spring b and is in the extreme extended positions relative to the housing 1. The housing 5 is fastened with an abutment 7 for the part and has two oppositely spaced screw grooves 8, which, depending on the requirements for the workpiece, have a specified angle of inclination of the screw groove to the feed axis of the fixture.

The roller 9 with the finger 10 can be restrictedly moved along the screw slot 8. The finger 10 is fixed in the guide sleeve 11, at the end of which the head 12 is mounted with cutters 13 and the guide screws 14.

The guide bushing 11 is mounted on radial-stop bearings: a ball 15 and a roller-conic 16, the guide bushing 11 can simultaneously move in the axial direction and rotate relative to the housing 1. The bearings 15 and

3Q 16 installed inside the case, on

which is mounted a cap 17. for adjusting and limiting the axial mix: bearing seams.

The device works as follows.

When cutting helical grooves on a non-rotating machined, cylindrical part, the fixture is set in translational motion along the central axis of the workpiece. The guide screws 14 then reach the workpiece and center it with respect to the tool. Immediately thereafter, the stop 7 of the copier 5 reaches the work piece and stops, transmitting to the axial force for cutting, and the body 1 with the shank 3 and the guide 2 continue the forward movement, taking the circumferential force from the copier b. From the housing 1, through the bearings 15 and 16, a force is transmitted to the guide sleeve 11 and then to the finger 10 and the roller 9, which slides along the screw groove 8 of the copier 5. As a result, the sleeve 11 with the head 12 and the cutters 13

copies a complex screw movement, as a result of which the screw grooves are cut on the workpiece until finger 10 with roller 9 reaches the extreme position of screw groove 8,

Claims (1)

1. The patent of France I 2097224 B 23 B, 1964, BUT fuf f ti-6 / g.Z