SU757256A1 - Aggregate machine for working non-round surfaces - Google Patents

Description

The invention relates to the field of machine tools.

• Known aggregate machine for processing non-circular surfaces, containing the base, clamping device, spindle head with a spindle, a copier with one inner and two outer tracks, a carriage with guides, a cutting mandrel and three interconnected rollers in contact with the tracks, one of which is spring loaded and two are stationary, with one of the stationary rollers in contact with the inside track of the copier, and the other with the outside [1].

Disadvantages of the device - low rigidity due to the installation of the copier on the base of the machine, which leads to a cantilever suspension of the guides with the carriage, rollers and cutter relative to the drive spindle and the workpiece, the design complexity of the sequential installation of the tool with the carriage and guide rollers on the guides, fixed pivotally on the spindle.

The purpose of the present invention is to simplify the design of the machine, increasing its rigidity and performance.

2

To achieve this goal cam fixedly mounted on the front of the spindle head and the spindle is provided with a groove having the opportunity to interact with the stationary roller will contact ₅ conductive with the inner race of the copier, with a spring-loaded roller mounted swingably about the rotation axis of the stationary roller contacting the outer copier track.

10 In order to maintain perpendicularity of the cutting edge two outer guide track copier are in the form of alternating between a radial projections and straight sections, and against the projections of one track location with ¹ wife rectilinear portions of the second track, and at the corners of the two paths have a uniform profile extending radial projections tracks .

FIG. 1 shows the proposed standard, side view; in fig. 2 - the same, top view; in fig. 3 - section A — A in FIG. 2 to

machine faceplate; in fig. 4 - section B - B

in fig. 3 showing copier profiles;

in fig. 5 is a view along arrow B in FIG. 3,

3

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four

depicting the profile of the workpiece; in fig. 6 is a view along arrow G in FIG. 4, showing the installation of a spring-loaded roller on the axis of the stationary roller.

The machine consists of a base 1, on which a rotary table 2 and a power table 3 are installed. On the rotary table 2 a clamping device 4 is installed with workpieces 5 that have a processing profile 6. The power table 3 bears on the spindle headstock 7 with a driving motor 8 and a faceplate 9. On the spindle 10 of the spindle headstock 7, having a groove 11, the body 12 of the faceplate 9 is installed, in which the carriage 14 is mounted along the guides 13 with a cutting mandrel 16 mounted on the supports 15 , on the outer end of which the cutter 17 is mounted, and on the opposite end - stationary rollers 18 and 19, located on opposite sides of the copier 20. The roller 21 is mounted on the lever 22, pressed by springs 23, the swing axis of which is aligned with the axis of rotation of the roller 19. Rollers 18 , 19 and 21 dissolved with paths 24, 25 and 26 of the copier 20, attached to the housing 27 of the headstock 7. The inner race 24 of the copier 20 copies the profile 6 of the workpiece 5.

The outer tracks 25 and 26 are made of alternating radial protrusions 28 and straight sections 29, with the straight tracks 29 of the second track located against the projections 28 of the same track, and in the corners both tracks have a single profile 30 that continues the radial projections 28 of both tracks.

The machine works as follows.

The workpiece 5 is mounted on the device 4 and fixed. The turntable 2 feeds the part to the machining area. The power table 3 provides the working feed spindle headstock 7 with a driving motor 8 and faceplate 9.

When turning on the rotation of the drive motor 8, the spindle 10 (FIG. 4) and with it the body 12 of the faceplate 9 begin to rotate. Together with the housing 12, the guides 13 fixed on it rotate, the carriage 14 with a cutting tool 16 mounted on it with supports 15 with a cutter 17 and rollers 18, 19 and 21 with a lever 22 and springs 23. The rollers 18, 19 and 21 roll in this direction tracks 24, 25 and 26 of copier 20, forcing the incisal mandrel 16 with the cutter 17 to describe the profile 6 of the workpiece 5, moving along the guides 13. The rollers 19 and 21 cornering alternately rotate relative to each other, moving along the tracks 25 and 26, while This one of them, for example roller 19 rises on a ledge 28 track and 25, and the roller 21 moves along the straight section 29 of the track 26. The roller 18 during operation of the machine only moves along the track 24. This position of the rollers 18, 19 and 21 on the cam 20 shakes around its axis a cutting tool 16 with a cutter 17 on the supports 15 , thereby preserving the perpendicularity of the cutting edge of the tool 17 to the workpiece 6.

To create a constant power closure of the rollers 18, 19 and 21 with cam 20 and wear compensation, the roller 21 is mounted on the lever 22, is placed on the axis of the roller 19 along with it and springs 23 pressed against the track 26. This allows it to move under the action of springs 23 relative to cut the mandrel 16, always clinging to the track 26 of the copier 20 and compensate for the inaccuracy of manufacturing the copier 20. When you turn the spindle 10 with the body 12 of the faceplate 9 90 ° rollers 18, 19 and 21 are located on those straight sections 29 that are located on the long side of the copier 20 . In doing so, they move the carriage 14 toward the center of the spindle 10. Since the distance from the long sides of the copier to the center of the spindle is less than the distance from the short sides of the copier to the same center, the roller 18, moving to the center of the spindle, will go into groove 11. Spindle 10 together with roller 18 rotates until rollers 21 and 19 come out on straight sections 29, located on the short sides of the copier. When this roller 18 out of the groove 11 of the spindle 10.

After turning the cutter mandrel 16 with the cutter 17 at 360 °, the work cycle repeats.

Claims (2)

Claim 1. Aggregate machine for processing non-circular surfaces, containing the base, clamping device, spindle headstock with a spindle, a copier with one inner and two outer tracks, a carriage with guides, a cutting mandrel and three interconnected rollers in contact with the tracks, one of which is spring loaded , and two are stationary, with one of the stationary rollers in contact with the inner track of the copier, and the other with the outer one, characterized in that, in order to simplify the design of the machine, increase its rigidity and level of performance, the machine is fixedly secured to the front of the spindle head and the spindle is provided with a groove in which in operation includes a stationary roller in contact with inner race of the copier, with a spring-loaded roller mounted * the possibility of swinging about the axis of rotation of the stationary roller in contact with the outer track of the copier. 2. Machine on π. 1, characterized in that, in order to preserve the perpendicularity of the cutting edge, two outer rails 757256 Copier tracks are made in the form of alternating radial protrusions and straight sections, with straight sections of the second track against the projections of one track, and in the corners both tracks have a single ₅ profile, continuing the radial protrusions of the tracks.