SU889256A1 - Apparatus for working parts with holes - Google Patents

Description

The invention relates to the processing of metals by pressure, and in particular to the structures of the device for processing parts with holes.

A device for processing parts with holes, containing the upper plate with tools, the lower plate with the main guide bushings PBB tools, as well as support under the workpiece- [1].

The disadvantage of this device is the low quality of the parts that is due to the design features of the device.

The purpose of the invention is to improve the quality of the parts.

This goal is achieved in that the device for processing parts with holes, containing the upper displacement, while counter-directed ends of the main and additional guides. the bushings are made with protrusions, and ^{: the} tools are made in the form of mandrels.

The drawing shows the proposed device, General view.

The device comprises an upper plate and a lower plate 2, which are interconnected by columns with springs placed on them (not shown). In the upper plate 1, tools are installed in the form of mandrels 3 pressed into the bushings 4. The upper ends of the mandrels and bushings 4 abut against a base plate 5 mounted on the upper plate 1. A housing 6 is attached to the lower plate, in which the lower guide bushings 7 are pressed in and a holder 8, in which the upper guide bushings 9 are mounted with axial movement.

880256 grooves around the hole of the workpiece. Between the housing 6 and the cage 8 are placed catchers 10, which fix the part in the position necessary during processing. The cage 8 ustanoe- _s Lena ball locks 11, carrying the upper retaining guide sleeves in the uppermost position. An intermediate plate 12 is attached to the clip 8 in its upper part, restricting the movement of the upper guide bushings

9. The press slider 13 is connected to the upper plate 1 by means of rods 14, which can be moved in its nests.

The device operates as follows 15 times.

In the initial position, the slider 13.

the press, the upper plate 1 with the mandrels 3 installed in it, the upper guide bushings, which with their upper ends abut against the intermediate plate 12, are in the upper position. When moving down the press slider 13, it enters into contact with the upper plate 1 and when moving downward together, the mandrel 3, passing through the holes of the workpiece 15, enter the centering holes of the lower guide bushings 7. Upon further movement of the upper plate 1 of the bush 4 - ₃₀ dyat in contact with the upper guide bushings 9 and mix them in order to contact the part 15, after which the process of shaping the annular grooves around the holes begins, during which the metal ·, la is compressed around the mandrels 3. B as a result of this, the geometry · ^{1 of the} machined holes is improved, the accuracy of the step between the holes is increased, and the strength properties of the material are improved. their call.

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When the device is operating, the upper guide bushings 9 fulfill a dual role, firstly, they serve to create a rigid tool-component system, and secondly, they participate in the shaping of ring-shaped grooves around the holes,

When the slider 13 moves up, the rods 14, fixed in it, grab the upper plate 1 with their heads and move it, while the part 15, tightly pressed on the mandrel 3, raises the upper guide bushings 9, which abut against the intermediate plate 12, they remove the part 15. The upper guide bushings 9 remain in the upper position due to the action of the ball clamps 11. After that, part 15 is removed from the device and the next part is fed into the treatment zone in: the processing process is repeated.

The presence of upper and lower guide bushings that are in direct contact with the part during processing (i.e., as close as possible to it), makes it possible to increase the rigidity of the tool.

Due to the shape of the annular grooves around the holes, in which the material is squeezed simultaneously around the mandrels introduced into the holes, the fatigue strength of the material in the hole zone is increased, and in combination with the increased rigidity of the tool, the geometry and purity of the machined holes are improved (the accuracy of the intercenter distance between the holes increases.

The use of the device allows to exclude such finishing operations as reaming, reaming and diamond grinding, and grinding used to ensure accurate machining of holes.

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Claims (1)

(54) DEVICE FOR TREATING DETAILS The invention relates to the processing of metals by pressure, in particular to the structures of a device for processing parts with holes. A device for machining parts with openings is known, comprising an upper plate with tools, a bottom plate with main guide bushings, and tools, as well as a support for the workpiece 1. The disadvantage of this device is the low quality of the parts produced, which is due to the design features of the device. The purpose of the invention is to improve the quality of the parts produced. This goal is achieved by the fact that a device for machining parts with holes, containing an upper / fine tool with tools, a bottom plate with main guide sleeves for tools, as well as a support for the workpiece being machined, additional sleeves, and with holes. axially displaced, while the opposite ends of the main and additional directions & luishh, sleeves are made with protrusions, and the tools are made in the form of mandrels. The drawing shows the proposed device, General view. The device contains upper state 1 and lower plate 2, which are connected to each other by columns with springs placed on them (not shown). In the upper plate 1, tools are installed in the mandrels 3 pressed into the sleeves 4. The upper ends of the mandrels and sleeves 4 abut against the - support plate 5 fixed to the upper plate 1. A housing 6 in which the lower guide sleeves 7 are pressed in, and the yoke 8, in which the upper guiding sleeves 9 are mounted with the possibility of axial movement. The end surfaces of the sleeves 7 and 9, oppositely directed between, are made up of a mold that forms for forming annular 3 & grooves around the hole machined. Between the housing 6 and the yoke 8 are placed the catchers 10, which fix the part in the position required during processing. In the holder 8, ball locks 11 are installed, which hold the upper guide bushings in the extreme upper position. An intermediate plate 12 is attached to the holder 8 in its upper part, which restricts the movement of the upper guide bushes 9, the press Slider 13 is connected to the upper plate 1 by means of 14, which can be moved in its slots. The device works as follows. In the initial position of the slider 13. press, upper plate 1 with mandrels 3 installed therein, upper guide bushings that abut their upper ends against promeculate 12 are in the upper position. When moving down the slider 13 of the press, it comes into contact with the upper plate 1 and, when coKviecTHOM out of mixing down, the mandrel 3, passes through the holes of the workpiece 15, enters the centering holes of the lower guide bushes 7. With further movement of the upper plate 1 of the sleeve 4 they come into contact with the upper guide bushes 9 and move them to contact the base {part) with part 15, after which the process of forming annular grooves around the holes begins, during which the metal lapping around the mandrels 3 occurs. tate this improved goometri processed holes, the step increases the accuracy of the orifices, are improved in the strength properties of the material. call them. When the device operates, the upper guide bushes 9 perform a two-piece role, firstly, they serve as a hard tool system1-part, and secondly, they participate in shaping the annular grooves around the holes, while the slider 13 moves upwards upwards tgv 14 , fastened in it, grip the upper joint 1 with their heads and move it, at the same time, the part 15 is tightly crimped on the mandrel 3, lifts the upper guide sleeves 9, which go up into the intermediate pin 12, realizing. I remove the parts 15. The upper guide sleeves 9 due to the action of the ball retainers 11 remain in the upper position. Thereafter, the part 15 is removed from the device and the subsequent part in the process is fed to the treatment area: the process is repeated. The presence of the upper and lower guide bushings in contact with processing directly with the part (i.e. as close as possible to it), makes it possible to increase the rigidity of the tool. Due to the formation of annular grooves around the holes, which simultaneously compress the material around the mandrels inserted into the holes, the fatigue strength of the material in the hole zone increases, and in combination with increased tool rigidity, the geometry and purity of the holes are improved (the accuracy of the center to center distance The use of the device eliminates such finishing operations as sinking, deploying and diamond-cutting, used to provide Precision hole machining. Formula of the Invention A device for machining holes with holes, comprising an upper plate with tools, a lower plate with basic ample guide bushings for tools, as well as a support for the workpiece, characterized in that parts, it is equipped with additional guide bushes, one-dimensioned, and with the possibility of axial movement, while the opposite ends of the main and additional guide bushings are made with protrusions , and the tools are made in the form of mandrels. Sources of information taken into account in the examination 1. Technologists and production organization. Collection. Kiev, UkrNIINTI, 1976, No. 2, p. 28 (prototype).