SU914237A1 - Metal cutting machine tool - Google Patents

Description

SUBSTANCE: invention relates to machine ^- tool ^- digging, in particular to metal-cutting machine tools with programmed control.

A metal-cutting machine is known, containing a base, in the central part of which a rotary table is placed on the supporting elements, and on the peripheral parts there are racks mounted on guides with the possibility of displacements in the radial direction and carrying power heads. At least one of the walls is located on the stand with the possibility of rotation relative to the axis of rotation of the turntable [1]. 'five

The disadvantages of the machine are the complexity and high cost of manufacture of the annular guides. In addition, __ backlash-free movable joints in annular guides are almost impossible to obtain and therefore with angular turns of the power heads, due to the reversal even due to very small gaps in the guides, the spindle axis 25 deviates from the center of the rotary table, which affects the accuracy of machining parts.

The purpose of the invention is to improve the accuracy of processing. thirty

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To achieve this goal, the base of the machine is equipped with a shaft mounted in the supporting elements of the central part of the base coaxially with the axis of the turntable, and the stand is hinged to the shaft.

Moreover, the stand is connected to the shaft through the additionally introduced thrust, one end rigidly fixed on the stand, and the other pivotally on the shaft.

FIG. 1 schematically shows a machine with a cut along the supporting elements in the central part of the base; in fig. 2 - machine, plan view

On the central part of the base 1, a rotary table 3 is mounted on the supporting element 2, on which the workpiece is fastened (indicated by thin lines), on the peripheral parts of the base 1 on the supporting elements 4 stands 5 are mounted with the possibility of rotation “about the center of the rotary table 3 from the actuators b using the 7, one end rigidly mounted on the stands 5, and the other - pivotally, using bearings 8 connected to the shaft 9, fixedly mounted in the supporting elements of the central part

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the base is coaxial with the axis of the rotary table 3. On the guides 10 of the stands 5, racks 11 are installed with the possibility of reciprocating movement in the radial direction from the drives 12 and carrying power heads 5 13, located in the guides 14 with the possibility of reciprocating moving in the vertical direction drives 15. On the top, and on their planes of the uprights 11, 10 mechanisms of automatic tool changer 16 are mounted, each of which includes a turntable with a set of tools and a turning drive (not shown) and a hand 17 grip and shift ^ 5 tool in the spindle.

To protect the racks 11 from overturning on the supports 5, elements 18 are provided in contact with the response elements 19 of the base 1 · _η

All main and auxiliary drives ^1-negative movements related to the software controller.

The machine works as follows. ·

The workpiece is mounted and fixed on the rotary table 3. Stands 5, turning on bearings 8 around shaft 9 and moving along supporting elements 4, put the spindles of power heads 13 fixed on racks 11 into 30 corresponding work areas of the part. At the same time The mechanisms of automatic tool changer 16 are activated and hands 17 make tool changers in the spindles of the power heads 35 in accordance with a predetermined program.

From the actuators 15, the power heads 13, moving in the vertical guides 14, are installed in the operating position 40, while the actuators 12 of the stand 11 are led to the 'detail processing zone. The drives of the main spindle movement and the working feed of the tools are turned on - the part is being processed.

At the end of the processing, the main motion and working feed drives are turned off, the racks 11 are retracted to the initial position. In accordance with a given program, a command is given to rotate and fix the dividing table 3. The next cycle of setting up the machine for processing other zones of the workpiece is turned on with subsequent processing.

The invention allows to improve the accuracy of machining parts on the machine, to expand the technological capabilities and reduce its cost.

Claims (2)

Claim 1. Metal-cutting machine containing a base, in the central part of which a rotary table is placed on the supporting elements, and on the peripheral parts there are racks mounted on guides with the possibility of moving in the radial direction and carrying power heads, and at least one of the racks is located on the stand with the possibility of rotation relative to the axis of rotation of the rotary table, about the fact that, in order to improve the processing accuracy, the base of the machine is equipped with a shaft installed in the supporting elements of the central the base parts are coaxial with the axis of the turntable, and the stand is hinged to the shaft. 2. Machine on π. 1, that is the fact that the stand is connected with the shaft through the additionally introduced thrust, one end rigidly fixed on the stand, and the other hinged on the shaft.