SU1237296A1 - Radial and forging machine - Google Patents

Description

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The invention relates to a molding machine industry, namely to radial forging machine (RCM) structures designed for machining deep holes of tubular articles.

The aim of the invention is to increase the accuracy of machining holes of products, as well as increasing the performance of the RCM.

On fig.G schematically shows the RCM, a general view; figure 2 - installation diagram of the workpiece and its position in the forging mechanism during processing; Fig. 3 shows a self-installation tool for the support of the mandrel V of the counter fixator; FIG. 4 is a view A of FIG. 3,

The radial forging machine comprises a forging mechanism 1 with strikers 2, a clamping head-manipulator 3 installed in the guides of the base 4 with the possibility of reciprocating movement in the axial direction and with a hollow spindle 5 placed in it with the possibility of rotation, through which the mandrel passes -dorn 6, as well as an actuator for displacing the clamping head-manipulator 3, ejected in the form of a hydraulic cylinder 7.

The radial forging machine also contains the counterfix 8 with the centering mandrel 9 placed with the possibility of reciprocating movement in the axial direction, a movement drive of the centrifugal mandrel, filled in the form of a hydraulic cylinder 10, the shaft II of which is connected with the centering mandrel 9.

The movement drive of the clamping head 3 is extended in. In the form of hydraulic cylinders 12, the counterfss 8 is mounted on a rack 13 connected by two guide columns 14 with a faceplate 15 mounted on the forging mechanism bed 1 and centered about the forging axis.

The centering mandrel 9 has a support made in the form of a housing 16 mounted on the guide columns 14 with the possibility of reciprocating and post-axial movement in the axial direction of the housing 16 placed in the housing 1 b of the central support element 17, one end of the hydraulic cylinder 10 interacting with the rod 11 concave element

20

25

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which is made in the form of a sub

18 and mounted in the housing 16 with the possibility of plane-parallel movement in the plane, perpendicular to the p5 forging axis, and interacting through the other end of the central support element 17 with a drive for moving the centering mandrel and the convex element made

0 fifth 19 installed in housing 16 with the possibility of angular displacement relative to the forging axis and connected to the centering mandrel 9 through the holder 20 and the yoke 21. With this, the holder 20 is mounted in rolling bearings 22 and, therefore, can rotate around its own axis together with the mandrel 9 and the workpiece to be processed, and to absorb the shock axial loads occurring in the process; forging, between the convex element 19 and the holder 20 of the set of disc springs 23 and the thrust bearing 24.

The centering mandrel support also includes two removable rings 25 and 26 mounted on the housing, one of which 25 is connected to the tight element 19a and the other 26 is connected to

30 - supporting element 7 screws 27, elastic rods 28, uniformly covering the elements 18 around the area,

19 spherical pair and ends fixed in rings 25,26 using creative elements 2.9 and 30, while the radius of the spherical surface of the concave spherical element 18 is greater than the distance from this surface to the working part of the centering mandrel 9,

40 i.e. to the part of the mandrel in which the workpiece is fixed.

The elastic rods 28 form, together with the rings 25 and 26, an elastic cylindrical shape of the lattice const 5 of the sling wheel type, which is elastically elastic in the axial and radial directions.

From the axial displacement, the yoke 21 is retained by the ring 31 and the spring-loaded screws 32, and the entirely elastic construction (25-26-28) is by the ring 33 and the screws 34, the concave element 18 is kept from falling out by the ring 35 and the screws 36.

55 Ra, and; ialno-forging machine works as follows.

The workpiece 37 is installed in the spindle slot-groove

3I

.5 the clamping head 3 of the manipulator 3 and into the seat of the mandrel 9 of the fixture 8. Lastly, it is located in the. far right of the forging mechanism 1 position. The pressure in the hydraulic cylinders 11 and 12 constantly holds the workpiece 37 between the mandrel 9 and the spindle 5. The mandrel-mandrel 6 is inserted into the hole of the workpiece 37. This mandrel is constantly in position under the forging mechanism 2.

The flow of the working fluid into the rod cavities of the hydraulic cylinders 12 imparts axial movement to the clamping head 3. the rotation of the spindle 5, and hence the workpiece 37.

Next, the workpiece 37 is introduced into the space between the strikers 2 and the forging is started.

In the process of machine operation, the forging axis, formed at a certain moment by the strikers 2 (point A), can be displaced from the common forging axis 1 originally installed, spindle 5 (point B) and mandrel 9 (point C) under the influence of forging forces, vibrations, displacements in pairs of training the kinematic chain of the machine, etc. In this case, the mandrel 9, acting through the holder 20 and the yoke 21 at the same time on the spheres {1 pair 18-19 and the elastic rods 28 under the action of the forces imparted by the strikers 2 to the workpiece 37, and thanks to the elements 25,26,28 and 18,19 begins to displace10

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s and occupies a new position corresponding to the actual axis of the working surfaces of the strikers 2. This is due to the fact that the spherical element (nth) 19, which is in contact with the movably mounted spherical element (support) 18, can due to this contact, as well as the interaction with an elastic-compliant design 25-26-28 to make an angular displacement. The required elasticity of the elastic structure 25-26-28 is determined by the state of the RCM actuators in the course of its operation.

Compared with the known RCM, which is similar in purpose and design, due to this technical solution of the centering mandrel of the counterfixator, the proposed machine can be automatically adjusted during operation of the machine by correcting the coaxiality of the fixture, strikers and spindle of the clamping head. This makes it possible to improve the quality (accuracy) of machining deep holes; increase the time period of the RCM operation between the previous and next stops in order to restore the misaligned alignment to the required accuracy standards, which increases the machine's performance and the economy of its operation; and reduce the possibility of mandrel-mandrel breakage due to misalignment.

20

five

0

five

ff

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27 26 29 70 28 35 78 36 73 2223PZ-30 29

View

FIG. 3

28

74

74

3f

32

Editor I.Shvydka

Compiled by V.Ponikaron

Tehred L. Serdyukova Proofreader L. Pilipenko

Order 3227/11 Circulation 655Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (2)

1. RADIAL-FORGING MACHINE, comprising a forging mechanism installed in the guide rails of the bed with the possibility of reciprocating movement in the axial direction from the drive clamping head-manipulator, a counterfix with placed with the possibility of reciprocating movement from the drive centering mandrel having a support, characterized in that, in order to improve the accuracy of processing of product openings and increase productivity, the centering support is made in the form of a guide mounted on rails the reciprocating movement in the axial direction of the housing, a spherical pair, the concave element of which is mounted in the housing with the possibility of plane-parallel movement in a plane perpendicular to the forging axis, and interaction with the drive moving the centering mandrel 'and a convex element mounted in the housing with the possibility of angular displacement relative to forging axis and associated with a centering mandrel mounted on the housing of two removable rings, as well as elastic rods spanning evenly around the circumference STI spherical elements and a pair of ends fastened to said removable rings. 2. Machine pop. 1, characterized in that the radius of the spherical surface of the concave spherical element is greater than the distance from this surface to the working part of the centering mandrel. c <o ω 1237296 2