RU1811472C - Machine tool for polishing holes of drawing die - Google Patents

Abstract

Usage: engineering and metallurgy. It will find application for machining small diameter holes, mainly for grinding drawing channels in carbides and diamond fibers. Summary of the invention: due to the fact that in the base 1 is mounted with the possibility of reciprocating movement of the rolling pin 6 with supports 22 connected to the carriage 10 and a cam designed to contact the carriage 10 and rotate it with the supports 22 relative to the rolling pin 6 and install the needle holders 16 in the carriage 10 by means of cross-coupled couplings introduced into the machine and connected to the rotary drive, processing from one installation is carried out with any defects with high quality and productivity. 7 silt

Description

Figure 1

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The invention relates to devices for machining small-diameter holes, primarily for grinding drawing channels in hard alloys and diamond fibers, and will find application in mechanical engineering and metallurgy.

The purpose of the invention is to improve the quality and productivity of processing.

In FIG. 1 schematically shows the construction of a machine; in FIG. 2 is a section AA in FIG. 1; in FIG. 3 - section BB in FIG. 1; in FIG. 4 is a section BB in FIG. 1; in FIG. 5 a section GG in FIG. 1; in FIG. 6 - place I in FIG. 1; in FIG. 7 - section EE in FIG. 2,

On the base 1, a number of fiber holders 2 with rotation drives 3, brackets 4 and oscillating drive 5 are installed

. horizontal movement. In the brackets 4, a rolling pin 6 is placed, carrying the disk 7, pressed by means of a spring 8 to an eccentric 9 connected to the drive 5. On the rolling pin 6, the carriage 1.0 is mounted for rotation, and is pressed by a spring 11 to the cam 12 of the oscillating vertical drive 13. In the carriage 10, supports 14 of the spindles 15 are placed, carrying the needle holders 16 and receiving rotation from the common drive 17. The spindles 15 are connected to the supports 14 by means of cross couplings 18 providing the spindles 15 of the movement in several planes. The rolling pin 6 is mounted on the brackets 4 by means of rollers 19. In each fiber holder 2, a die 20 is mounted, processed by a needle 21, which is fixed in the corresponding needle holder 16, the carriage 10 is rotatable relative to the rolling pin b on the supports 22.

The claimed machine operates as follows.

The diamond dies 20 wear out during operation, so the holes in them have to be periodically grinded to a larger size in order to restore shape, after which they can be used to draw larger wire diameters. The pulleys 2 are sorted by type of damage to clarify the nature of the subsequent processing, then they are installed in the fiber holders 2, where they are centered coaxially with the spindle 14 and fixed with wax, and the needle holder 16c is inserted into the spindles 14 with needles 21 of the appropriate size that fit into the machined holes dragged 20. After

±. this includes rotation 20 from the drive 3, which tells each fiber holder 2 an individual rotation speed, and the rotation of the spindles 15 with the needles 21, as well as the oscillating movement drives 5 and 13, which can operate alternately or simultaneously. The processing conditions depend on the type of defect of the die 20, the nature of the treatment (preliminary or final), as well as on the size of the removed allowance. So, to remove annular damage and to correct the shape of the die 20, quick preliminary grinding is performed due to the slow rotation of the fiber holders 2, vertical oscillating movement carriages 10 from the eccentric drive

13 and the use of coarse diamond paste. Upon final grinding of the hole of the die 20 to a mirror shine, the fiber holders 2 are rotated rapidly and horizontally oscillate. The carriage 10 is moved from the eccentric drive 5 with a thin diamond paste fed into the hole to be processed. To increase the productivity and quality of processing of the die 20 include

at the same time two eccentric drives 5 and 13, as a result of which the carriage 10 receives movement in two mutually perpendicular planes, and the needles 21 pressed against the walls of the dies 20 s exactly

the calculated force (the mechanism is not shown in the drawing), the metal is removed. Due to the fact that the spindles 15 with needle holders 16 are installed in the cross couplings 18, the needles 21 during the joint operation of both

 drives 5, 13 perform complex spatial movement, contribute to improving the quality of processing.

Men the position of the eccentric 9 and 12, you can adjust the amplitude of the oscillations

carriages 10 and the nature of the movement of the needles 21, which allows for maximum productivity and repair dies with any defects.

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Claims (1)

The claims A machine for polishing holes in dies, comprising a base, fiber holders located thereon, associated with rotation drives, and a carriage mounted with the possibility of reciprocating movement and carrying needle holders, characterized in that. in order to improve quality and productivity of processing, the machine is equipped with a rolling pin mounted at the base with the possibility of reciprocating movement with supports connected to the carriage and cam designed to contact and rotate the carriage with supports relative to the rolling pin, with the help of cross-shaped needle holders introduced into the machine, couplings connected to the rotation drive are installed in the carriage. FIG. 2 1811472 yr