SU653013A1 - Apparatus for working the external surface of hollow blank end portion - Google Patents

Description

(54) DEVICE FOR TREATING EXTERNAL SURFACE KOHUA PREPARATION FIELD

The invention relates to the processing of metals by pressure and can be used to roll external thread on thin-walled cylindrical billets such as tubes of luminaires.

Known knurled head, containing smooth tapered and threaded rollers placed in the housing, mounted on one and the same axes, and a mandrel with cutting edges 1.

However, such a device is not adapted for removing the inner chamfer at the end of the pipe, which is necessary in the manufacture of, for example, lamp tubes, in order not to damage the insulation of the wires passing through the tube opening. Another disadvantage of the known device is the impossibility of its operation in the automatic mode, i.e. the opening of the head after the end of the knurling is not automatic, but manually.

The closest in technical essence and the achieved result to the invention is a device for treating the outer surface of the end of a hollow billet, comprising thread rolling rollers mounted on eccentric axes x

the housing associated with the shank, as well as the movable sleeve and the stop, are located in the tailgate 2. - .--; However, the known head does not allow to combine the processing of the outer surface to: the end of the hollow billet while simultaneously removing the inner chamfer on its face, i.e. with countersinking the hole of the workpiece, which is necessary in the manufacture, for example, of tubes of luminaires, in order not to damage the insulation of the wires passing through the opening of the tube.

Another disadvantage of the well-known head is that the preliminary reduction of the outer diameter of the workpiece before thread rolling is done by turning with cutting tools, which, when processing a thin-walled workpiece, can lead to thinning of its walls and their cutting during the rolling process.

In order to expand the technological capabilities of the device, the proposed device is equipped with a countersink mounted in a movable sleeve and spring-loaded in the axial direction.

Claims (2)

In addition, the movable sleeve may be made with a longitudinal groove, and a pin inserted into the groove is pressed into the countersink. The drawing shows the proposed device, in section, a General view. It contains three thread rolling rollers 1 installed on eccentric axles x 2. The front part of axes 2 is fixed in ring 3. The rear part of axes 2 is based in ring 4. Ring 3, rollers I and ring 4 are connected - with case 5 with three screws 6. Case 5 is worn on / shank 7 and connected to it by two tension springs 8. The gears 9 are engaged on the rear part of the axles 2, which engage with the bristles 10, which are rigidly mounted on the shank 7. The body 5 and the shank 7 have a pair of shaped grooves, the longitudinal sections of which coincide, and the screw cross. Screws I1 pass through the pair of grooves with rollers 12 mounted on them. Screws II fix the position of the ring 13 of the coupling relative to the housing 5 and the sleeve 14 relative to the shank 7. A countersink 15 is installed in the sleeve 14, connected by a compression spring 16 with an adjusting screw 17, which is fixed in the sleeve 14 by means of nuts 18 and 19. The countersink 15 is prevented from being turned in the sleeve 14 by a pin 20 which can move along the longitudinal grooves 21 of the sleeve 14. The head works as follows. The head is secured in the rod of the machine. In the closed position, it moves along the axis of the tube being machined and towards it. Rollers thread thread. At the end of the working stroke, the tube opening is processed by the countersink 15 with the necessary pressing force, adjustable spring16 and screw 17. At the same time, the end of the tube moves the sleeve 14, which in turn moves the screws 11 with rollers 12 along the grooves of the body 5 and the shank 7. First movement of screws 11 goes along straight sections, then along screw ones. When the screws 11 with rollers 12 move along the Binthog sections of the grooves due to the springs 8, the housing 5 rotates relative to the shank 7. Together with the housing 5, the rings 3 and 4 rotate, and the axes located in them run around the gear 9 through the pinions 9 and turn that leads to the disclosure of the head. After opening the head moves away from the workpiece. The head can be closed either manually with a handle or by moving the ring 13 to the front of the head due to the impact of the corresponding fork on it. Instead of rolling rollers in the head, you can fix the smooth tapered, ie, crimp rollers. The head will work similarly to the head with knurled rollers. The difference is that the countersinking of the hole in the workpiece will not be combined with thread rolling, but with crimping the work piece before rolling. Instead of rolling rollers in the head, you can also install one after another crimp and rolling rollers. The operation of this head is similar to the operation of a knurled head (1 and rollers. A head with combined crimping and rolling rollers will allow you to combine tube crimping and threading on it while simultaneously refluxing its opening. Claim of the invention. A device for processing the outer surface of the end of a hollow billet containing thread rolling rollers mounted on eccentric axles in a housing associated with a shank, as well as a movable sleeve and anvil housed in the shank, characterized in that capabilities, it is provided with a countersink mounted in a movable sleeve and axially spring-loaded 2. The device according to claim 1, characterized in that the movable sleeve is made with a longitudinal groove, and in the countersink pressed into the groove. taken into account during the examination 1.A.v.skoe certificate of the USSR No. 476928, class B 21 H 3/04, 25.12.73. 2. USSR author's certificate number 342715, cl. B 21 N 3/04, 19.03.71.