SU422538A1 - CENTERING DEVICE FOR CENTER-FREE MILLS - Google Patents

Description

one

This invention relates to the machining of metals on metal-cutting equipment.

Centering devices for centerless lathes are known, made in the form of spring-loaded rollers mounted on axles and used to increase the rigidity of the AIDS system and to direct the turned bar directly in front of the cutting head.

When turning blanks, for example, from titanium alloys on a centerless lathe, a chip breaking method is known, according to which the grooves on the machined surface are cut when the blank is fed into the cutting head. However, placing the slotted incisors in a separate housing makes it difficult to access them for replacement.

The aim of the invention is to combine the operations of a centering device and the application of chip separation grooves.

It is achieved by the fact that the centering rollers are made detachable, and in place of the connector, fixed knives are fixed.

In addition, the knives are mounted on rolling bearings.

FIG. 1 shows a centering device with a round knife fastening on a thread; pas figs. 2 - the same plan view; in fig.

3 - the same, with the installation of a knife on rolling bearings; in fig. 4 - the same plan view. The centering device is considered for centerless turning.

machine KZH-9306.

The device is a composite centering rollers, right and left, with a centering angle of the workpiece 11-130 °. The left roller consists of bodies 1 and 2, interconnected by a left-handed thread. Between housings 1 and 2, a round non 3 left-handed thread is installed. Housings 1 and 2 rotate on roller bearings 4, mounted on axis 5, which is connected to the left carriage 6 of the centering device of the machine by bolts 7. Housings 8 and 9 have right-hand thread during rotation from the workpiece 10 and are located on the right carriage I. Accordingly, the round knife 3 has a left-hand thread, and the round knife 12 is right-handed. The body of the rollers is closed 13. The diameter of the round knife (calculated) depends on the diameter of the workpiece and the size of the allowance being removed t. The depth of the groove t is equal to 2/3 of the size of the removed

allowance t. The sharpening angle of round knives is 90 °.

With the penetration of the depot of the workpiece 10 into the housings 1, 2 and 8, 9, the round knives 3 and 12 form diametrically opposite grooves with a depth of fk on the workpiece. If the bee-blades are mounted on the rolling bearings of FIG. 3), the housings 14 and are screwed together with each other by the left thread, and the housings 16 and 17 are respectively the right one. The circular knife 18 sits on the rollers 19 n relatively freely rotated from the rotation of the housings of the centering device under the action of frictional forces as the workpiece 10 moves.

The calculated diameter of the circular knife 18 is similar to the diameters of the circular knives 3 and 12.

When reorganizing the machine to another workpiece diameter, it is necessary to replace the round knives with the calculated diameter.

Subject invention

Claims (2)

1. A centering device for centerless machines, made in the form of rollers mounted on axles, characterized in that, in order to combine the centering operations and the application of chip breaker grooves, the rollers are made detachable, and in place of the connector fixed knives are fixed. 2. The device according to claim 1, characterized in that the notched knives are mounted on rolling bearings. 13