SU1815185A1 - Apparatus for magnetic abrasive machining - Google Patents

Description

The invention relates to the finishing of surfaces of parts such as bodies of revolution with a magnetic-abrasive powder in a magnetic field and can be used in mechanical engineering at finishing operations.

The aim of the invention is to improve productivity and quality when processing intermittent cylindrical surfaces. YU

FIG. 1 shows the device, general view; figure 2 - the design of the spindle assembly; figure 3,4 - design of the magnetic system: figure 5 - view along arrow A; fifteen

The device for magnetic abrasive machining consists of a bed 1, two spindle heads 2,3. installed on the bed 1 on one horizontal axis with 20 the possibility of longitudinal movement on both sides of the magnetic system 4, located on the bed 1 and having the ability to move across the axis of the spindles 5,6. Spindle heads 2.3 - 25 consist of spindle units; having drives of the main movement 7 (rotation of the spindle) and mechanisms of oscillation 8 of the spindle 5,6 along its own horizontal axis O-O. Magnetic system 4 consists of one magnetic circuit 9, on the cores 10.11 of which two magnetizing coils 12.13 are mounted. The cores are closed between themselves by two devices 14,15 for adjusting 35 the inter-pole space between two pairs of pole pieces 16,17 having a flat rectangular shape. The position of the magnetic system is determined by limit switches 18,19-, 40

The device works as follows.

In the initial position, the spindle heads 2,3 are, respectively, in the left and right extreme positions, and the magnetic system 4 is in the extreme rear position (limit switch 18). The interpolar space between the pairs of pole pieces 16,17 is adjusted to the required dimensions of the processed products (diameter + gap between the product and the pole piece).

• Magnetic system 4 is switched on and ferroabrasive powder is poured into the interpolar spaces between pairs of 55 pole pieces 16,17 (left and right). Each pair of pole pieces

16,17 retains ferroabrasive powder only in its interpolar space. _

Workpieces are clamped in spindles 5,6. Pressing a button (not shown) starts the automatic cycle of the machine. In this case, the right headstock 2 approaches the magnetic system 4 in such a way that the intake part of the tap fits into the zone of the interpolar space of the right pole pieces 17. The rotation of the right spindle 5 in the right direction is automatically turned on and the supply of the magnetic system 4 is turned on (from the limit switch 18 to the limit switch 19). When the magnetic system 4 passes the required path, its movement is reversed and it moves to the limit switch 18. After stopping the magnetic system 4, the movement of the right headstock 2 is turned off until such a position that the calibrating part of the tap is located in the working area of the right pole of the pole pieces 17. At the same time, the movement of the left headstock 3 \ towards the magnetic system 4 occurs to a position when the bottomhole cone is not located in the working area of the left pole pieces 16; When the movements of both headstock 2.3 are stopped in the desired position, the right spindle 5 is reversed (left rotation) and the left spindle 6 is rotated (right rotation), at the same time, the supply of the magnetic system 4 from the limit switch 18 to the limit switch 19 is turned on, then it is reversed to the end switch

18. When the magnetic system 4 reaches the limit switch 18, the following movements are turned on: the right spindle head 2 to its original position and the rotation of its spindle 5 is turned off; left headstock 3 to the position when 'the gauging part of the tap will not be in the working space of the left pole pieces 16; reverse of the left spindle 6 (left rotation); supply of the magnetic system 4 to the limit switch 19 and vice versa.

While the gauging part of the tap is being processed, in the left pole-to-pole space, the tap is changed in the right spindle 5. When the magnetic system 4 reaches the limit switch 18, the left spindle head '3 moves to its original position, turns off -: the rotation of the spindle 6, -а the right spindle head 2 moves to the magnetic system 4 until the tapping cone of the tap is located in the working area of the right pole pieces 16, - the rotary movement of the right spindle 5 to the right is turned on and the magnetic system feeds to the limit switch 19. Time for processing the tapping cone of the tap in the spindle 5, the tap is replaced in the left spindle 6. Then the whole cycle is repeated.

Claims (1)

Claim A device for magnetic-abrasive processing of bodies of revolution, including two spindles for cantilever fastening of parts mounted on one horizontal axis and connected with a means for setting rotation and axial reciprocating movement, and a magnetic system with two pairs of pole pieces forming two working zones and installed in each pair with the possibility of independent regulation of the distance between them, which is distinguished by the fact that. in order to increase productivity and quality when processing 5 cylindrical intermittent surfaces, the spindles are located on both sides of the magnetic system, the means for setting their movement is made in the form of two independent drives) the magnetic οποί O theme is installed with the possibility of reciprocating movement in directions perpendicular to the axis spindles, and the working surfaces of the pole pieces are flat. Tg. 2. view A