SU1535682A1 - Arrangement for dimensional electrochemical machining of helical surfaces - Google Patents

Abstract

The invention relates to electrophysical and electrochemical processing methods, in particular, to a device for dimensional electrochemical machining of helical surfaces. The purpose of the invention is the expansion of technological capabilities. The device contains the bottom plate 1 mounted on the machine table in which the guides are fixed, the leaf spring 3, the ball 4, the movable element 5 with the parts 6 and the ball 7, which kinematically interact with the cam 8 of the screw 9. The screw feeder contains running screws 10, on one ends of which electrodes-tools 11 are installed with conductors 12 and conductor bushings 13, and the others are fixed by means of retainers 14 placed in grooves 15 in electric holders 16, which are installed in the top plate 17. Screws 10 are spring-loaded with compression springs 18, and screw 9 with a spring 19. Screw 9 is fixed in a sleeve 20 made of a dielectric material using a clamp 21 located in the groove 22. A screw surface is obtained by rotating the tool electrodes 11 through an angle of 360 ° + α while moving them along axes by the pitch of the helical surface, where α is the angle of rotation of the cam and the tool electrodes, ensuring their full plunge into the walls of the holes being machined. 3 il.

Description

The invention relates to electrophysical and electrochemical processing methods, in particular, to a device for dimensional electrochemical machining of helical surfaces.

The aim of the invention is the expansion of technological capabilities. Figure 1 shows the device, a general view; figure 2 - section aa in figure 1; on fig.Z - section bb in figure 1.

The device contains the bottom plate 1 installed on the machine table (not shown), in which the guides 2, the plate spring 3, the ball 4, the movable element 5 with the treated parts 6 and the ball 7 that are machined 5 are fixed. - interacts nematically with the cam 8 of the screw 9. The screw feed mechanism contains lead screws 10, at one end of which electrodes-tools 11 are mounted with conductors 12 and conductor sleeves 13 fixed in them, and others through retainers 14 placed in grooves 15, crepe ts vele x trododerzha- bodies 16, which are mounted in the upper plate 17 mounted on the machine spindle (not shown). The spindle screws 10 are spring-loaded in the feed direction by the compression springs 18, and the screw 9 by the spring 19. The screw 9 is fixed in the sleeve 20 of dielectric material with the aid of a clamp 21 located in the groove 22.

The device operates as follows.

Before starting the machining, spindles 10 and screw 9 with springs

18 and 19 are extended respectively from the electrode holders 16 and the sleeve 20 to the lowest position up to the stop in the latches 14 and 21. When the electrochemical machine table is moved vertically, the tool electrodes AND are inserted into the holes in the workpiece 23 of the parts 6 throughout their depth, conductors 12 bring to the stop

0 into the lower plate 1, and screw 9 — until it stops at the ball 4. Before the working start begins, the axis of the machined holes 23 are offset relative to the axes of rotation of the tool electrodes 11

In such a way that the latter freely enter the machined holes 23. After the working feed of the table has been turned on, the lead screws 10 with the tool electrodes 11 are screwed into the conductor bushings 13 by means of the clips 14, and pressing the ball 7 with the cam 8 spring-loaded 3 moving element 5 with workpieces

5 6 Before the tool electrodes 11 are fully inserted into the walls of the machined holes 23. After turning the screw 9 with the cam 8 and the driving screws 10 with the tool electrodes 11 at an angle o (. And moving the plate with the parts 6 to the extreme, right position insertion of the tool electrodes 11 into the walls of the holes 23 being machined to the full depth and alignment of the axes of rotation of the tool electrodes 11 with the axes of the holes being machined 23. After further turning the electrodes 11 through an angle of 360 ° thread processing

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five

would end up. Thus, a helical surface is obtained when the electrodes-instruments I turn by an angle (360 ° + оЈ) and simultaneously move them along the axis of the counting of the conductor sleeves 13 by the amount

a - t. (i)

where a is the amount of movement of the tool electrodes along the axis;

t is the pitch of the helix of the treated surface; df- is the angle of rotation of the cam and the tool electrodes, which ensure their complete plunging into the walls of the holes being machined. After the end of the working feed, the machine table is lowered. Moreover, the drive screws 10 with the tool tools 11 and the screw 9 will move in the opposite direction. Spring 3 returns the slider with the workpieces 6 to its original position.

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The use of the device entails expanding the technological capabilities of the machine at the expense of ensuring the radial supply of the machined parts relative to the tool electrodes, having a breathing axial displacement only.

Claims (1)

U Formula of invention A device for dimensional electrochemical machining of screw surfaces, containing a spring-loaded lead screw with an electrode tool, mounted in the top plate and connected to the feed drive, and a bottom plate for securing the workpieces, 20 that, in order to expand the technological capabilities, the nidn plate is made in the form of a movable element mounted on the guides, while the Additional lead screw with a cam was inserted into the device,. designed to interact with the moving element. 23 Fie.2 Fi.T