SU1301600A1 - Tool for abrasion/electrochemical grinding - Google Patents

Abstract

The invention relates to electrochemical processing methods, namely, tools for abrasive electro-picking. The aim of the invention is to increase the productivity and accuracy of processing. The tool contains a circle mounted on a slip ring and adjustable sector cathode plates located with a gap from the side surfaces of the circle in two layers and displaced (one relative to the other by half a sector step. The plates are installed on each side of the circle between the inner fixed disk with radial grooves into which pairs of fingers of said plates are inserted, and an external mounted with the possibility of rotation of a disk and screw grooves into which they are inserted along one of a pair of fingers of the cathode plates. The setting of the cdtodus plates is turned on the outer disk, due to which the cathode plates receive a radial displacement. 4 ill. S. (L o 00 o o: o o

Description

The invention relates to a combined abrasive electrochemical grinding and can be used in metalworking.

The purpose of the invention is to increase the productivity and accuracy of processing by simultaneously adjusting and precise fixing of all the cathode plates.

FIG. 1 shows a tool, a cut; in fig. 2 is a view A of FIG. one; in fig. 3 - section bb in fig „2; in fig. 4 shows a section B-B in FIG. 2

The tool is an abrasive or diamond circle 1 on a non-conductor bond, mounted on contact ring 2 and fixed to it by means of flange 3 and screws 4. Contact ring 2 together with flange 3 and screws 4 is a standard faceplate, Serving for grinding wheels on production machines, has annular grooves for balancing weights and a tapered bore. On each side of circle 1, the inner 5 and outer 6 cathode plates are evenly distributed in two rows, and

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so that between the side surfaces of the circle 1 and the side planes of the inner cathode plates 5 there is a gap of 1.5-2.5 mm, and relative to each other a number of inner cathode plates 5 and a row of outer cathode-feed plates 6 are offset by half a step. Cathode plates 5 and 6 are made in the form of sectors, the working surface of which is bounded by another c. A tool is placed in the spindle of a circular and surface grinding machine and supplied with a current lead with a collector and copper-graphite brushes in accordance with a radius equal to half of the average aliasing modes. . When machining on a circular grinding machine, the supply of technological current to the workpiece is also carried out through a rotating current-carrying device. On the surface grinding machine, the connection to the workpiece is carried out by means of a clamp and a clamping device. The negative pole of the source is connected to the current supply of the tool, and the positive pole is connected to the workpiece.

of the initial and minimum allowable for operation in the mode of abrasive grinding of the diameters of the circle 1. To ensure a predetermined position of the cathode plates 5 and 6, they are installed between the internal fixed disk 7 and the external highly rotatable disk 8. The internal fixed disk 7 adjacent to the side surface of the circle 1 and providing the thickness of the gap q fixed: together with the circle 1 on the contact ring 2 and is made with radial groove

in which, with a certain gap, the cathode fingers 9 and 10, which are pressed into the holes in the lower part, are inserted and flared flush from its inner side, for example,

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35 nicknames of power supply to the Tool in accordance with the specified modes are attached to the rotator2

plates 5 and 6 so that the latter can only radially move along the grooves of the inner disc 7. The outer disc 8 is provided with screw grooves into which only one of the pair of fingers — the fingers 10 — are inserted with a certain clearance and flared on its outer side. that the disk 8 has the possibility of free rotation around the axis of the slip ring 2 or 3 within the limits determined by the length of the screw grooves. For convenience of adjusting the position of the cathode plates 5 and 6, the outer disk 8 is provided with an adjustment ring 11, and the latter with a lock 12 entering the holes on the outer surface of the slip ring 2 or flange 3.

The use of the tool during processing is as follows.

The tool is placed in the spindle of the circular and surface grinding machines and is supplied with a current lead with a collector and copper-brush brushes. When machining on a circular grinding machine, the supply of technological current to the workpiece is also carried out through a rotating current-carrying device. On the surface grinding machine, the connection to the workpiece is carried out by means of a clamp and a clamping device. The negative pole of the source is connected to the current supply of the tool, and the positive pole is connected to the workpiece.

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and reciprocating motion, an electrolyte is fed into the treatment area and into the space between the cathode plates 5 and 6 and the side surfaces of the circle 1. Circle 1 is brought to the workpiece, after which he starts abrasive removal. The presence of a guaranteed sufficient for anodic dissolution of the gap between the cathode plates 5 and 6 and the workpiece, as well as the presence of electrolyte in the space on both sides of the circle 1 between its side surface and the cathode plates 5 and 6, provide an extensive area for the device to operate in and when using a diamond wheel on a non-conductive bond, in the mode of diamond electrochemical grinding. The presence of cathode plates on both sides of the circle provides the same anodic removal for the forward and reverse motion of the circle.

This makes abrasive removal easier.

the overall performance of the entire device is improved, including performance, and the wear of the wheel is reduced. With a gap between the cathode plates 5 and 6 and the surface of the workpiece 1.5–2 mm, the maximum anodic removal and the optimum combination of mechanical and anode components are removed. -When using the tool under the conditions of abrasive electrochemical grinding, especially under conditions of prevailing abrasive removal, significant wear of the wheel is achieved, accompanied by a decrease in its diameter and a decrease in the gap between the cathode plates 5 and 6 and the workpiece. Therefore, during the wear of the circle, the protrusion height of its working edge above the plates 5 and 6 is increased by readjusting. Turn off tool rotation, electrolyte delivery and power supply. After the final rotation is turned off, the device unfastens the latch 12, thereby releasing the ring 11, thus giving the opportunity to turn it with the disk 8 around the axis of the device. The disk 8 is turned counterclockwise. This is accompanied by the fact that the concave sides of the spiral grooves of the disk 8 act on the tubular fingers 10 of the plates 5 and 6 and force

they move uniformly at the same speed in the radial direction. The tubular pins 9 and 10 at this time slide along the radial grooves of the internal fixed disk 7. The rotation is continued until the desired value of the MEZ is established. After that, the outer disk 8 is again locked, the adjusting ring 11 is fixed relative to the ring 2 or the flange 3 with the clamp 12.

Claims (1)

Invention Formula A tool for abrasive electrochemical grinding, including an abrasive wheel on a non-conductive bond, mounted on a contact ring, on which adjustable cathode plates are placed, characterized in that, in order to increase productivity and precision of processing, it is fixed on the contact ring. two disks from each end of the circle are internal with radial grooves fixedly mounted, and external ones with screw grooves are installed with the possibility of rotation between the mobile and fixed disks a two layer cathode plates disposed sector, offset relative to each other by a half pitch sector, the cathode plates are connected to the disks with the possibility of relative movement, with two inner disc and with an outer - one of two fixed plates on the fingers. Phage / in id . W Yu Fm.z Editor A. Kozoriz Fig. ( Compiled by B. Kuznetsov Tehred A. KravchukKorrektor G.Reshetnik 1181/14 Circulation 976 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4