RU2262417C1 - Multi-position tool head - Google Patents

Abstract

FIELD: metal cutting processes and equipment, namely units of lathes, milling and boring machine tools.

SUBSTANCE: multi-position tool head includes floating member for fixing position of tool disc relative to its body, hydraulic cylinders for withdrawing floating fixing members; hydraulic cylinder for joining electric motor with kinematic circuit for rotating spindle of one of tool units. Tool head also includes cross-roller bearing assembly whose inner race has end teeth for engaging with said floating fixing members. Inner race is rigidly secured to body. Outer race includes two rigidly joined portions. One of said portion is rigidly joined with tool disc and it has toothed rim being part of kinematic circuit for rotating tool disc. Second portion has end teeth for engaging with fixing members.

EFFECT: enhanced accuracy of tool disc basing.

2 cl, 3 dwg

Description

The invention relates to the field of metal cutting, and in particular to the design of nodes of turning, milling and boring machines.

Known multi-position tool head containing a housing, a tool disk having the ability to rotate relative to the body, tool blocks mounted on the tool disk, an electric motor capable of alternately connecting with the kinematic chain of rotation of the tool disk and the kinematic chain of rotation of the spindle of one of the tool blocks, a hydraulic cylinder for connections of the electric motor with the kinematic chain of rotation of the tool disc, feedback sensor to control the angular position of the tool disc (see RU 2071870, 23 V 29/32, 1997).

A disadvantage of the known multi-position tool head is the significant dimensions that limit the technological capabilities of its use in the machine, as well as the insufficient accuracy of basing the tool disc, due to the low stiffness of the base elements.

The objective of the invention is to expand the technological capabilities of the multi-position tool head by reducing its size and thereby expanding the scope of its application.

The objective of the invention is also to increase the accuracy of basing of the tool disk by increasing the rigidity of the basic elements.

The problem is solved in that the multi-position tool head contains a housing, a tool disk that can be rotated relative to the body, tool blocks mounted on the tool disk, an electric motor that is alternately connected to the kinematic chain of rotation of the tool disk and the kinematic chain of rotation of the spindle of one of the tool blocks, a hydraulic cylinder for connecting an electric motor with a kinematic chain of rotation of the instrumental di a feedback sensor for monitoring the angular position of the tool disc, and to reduce the size, the tool head is equipped with floating clamps for positioning the tool disc relative to the housing, hydraulic cylinders for removing floating clamps and a hydraulic cylinder for connecting the electric motor to the kinematic spindle rotation circuit of one of the tool blocks, while the rotor it is advisable to arrange the electric motor coaxially with the axis of rotation of the tool disc.

To improve the accuracy of basing the tool disk, the head is equipped with a cross-roller bearing, the outer ring of which consists of two rigidly connected parts, has end teeth for interaction with the mentioned floating clamps and is rigidly connected to the housing, and the inner ring is connected to the tool disk and has a gear ring, included in the kinematic chain of rotation of the tool disc, as well as end teeth for interaction with the aforementioned floating clamps.

The invention is presented in figures 1-3, where:

figure 1 shows the kinematic diagram of a multi-position tool head with a hydraulic cylinder and a gear clutch in two positions — turning the head and for transmitting rotation to the tool;

figure 2 shows a longitudinal section of a multi-position tool head along the axis of rotation of the tool disc;

figure 3 shows a front view of a multi-position tool head (with a partial section).

The electric motor (M) item 1 (see figure 1) has the ability to connect alternately with two kinematic chains: the movement of rotation of the spindle of one of the tool blocks and the movement of rotation of the tool disk.

In the kinematic chain of rotation of the spindle of the tool block, the movement from the electric motor 1 through the gears 2, 3, 4, 5, 9 and 10 is transmitted to the coupling 12, controlled by the hydraulic cylinder 13. The gear coupling 11, controlled by the hydraulic cylinder 14, should be in such a position that gears 5 and 6 are unlocked.

The movement to rotate the tool disk is transmitted from the electric motor 1 through the gears 6 and 7 to the ring gear 8 of the internal gearing connected to the tool disk.

Toothed clutch 12 when the rotation of the tool disc should be in the unlocked position. The angular position of the tool disc and its correspondence to the working positions is monitored by the feedback sensor 15.

A synchronous electric motor 1 is installed in the housing 16 of the multi-position tool head (hereinafter referred to as the head), the rotor of which transmits rotational motion through the shaft 17 and gears to the actuators of the head (see Fig. 2, 3), while the rotor is mounted coaxially with the axis of rotation of the tool drive.

Cross-roller bearing 18 with its outer ring 19 (made structurally from two parts) is rigidly connected to the head housing. The inner ring 20 of the bearing is rigidly connected to the tool disk 21 and tool blocks 22 carrying the cutting tool, and has a gear ring 8 internal gearing included in the kinematic chain of rotation of the tool disk.

The outer ring 19 of the bearing 18 and one part 23 of its inner double ring are made with end teeth for fixing the angular position of the tool disc with floating clamps 24 (for example, axially arranged) under the action of the springs 25. The hydraulic cylinder 26 provides control of the head rotation drive.

The rotation to the spindle of the tool block 22 is transmitted through the bevel gears 27, 28 with circular teeth.

The head works as follows.

In the initial position, the tool disk of the head is in the working position, the front teeth of the bearing are fixed with a lock, both gear couplings are in the open state.

When the tool disk is rotated to the desired position, pressure is applied to the working cavity of the hydraulic cylinders 26, their pistons disengage the latches 24, unlocking the outer and inner rings of the bearing 18. At the same time, the hydraulic cylinder piston (to turn the electric motor into the kinematic chain of rotation of the tool disk) moves the corresponding gear clutch to the right and closes the kinematic chain to rotate the tool disc. The rotor of the electric motor rotates it to the required angular position, which is controlled by the feedback sensor 15. At the same time, the head control circuit ensures that the corresponding hydraulic cylinders are turned on simultaneously and the bearing is released.

Then, pressure is released in the cavities of the hydraulic cylinders 26, and under the action of the springs 25, the latches 24 block the inner rotary ring of the bearing relative to its outer ring. The hydraulic piston moves the gear clutch to the left, breaking the kinematic chain of rotation of the tool disc. The rotor of the electric motor returns to its original position by the feedback sensor. However, if necessary, pressure can be applied to the cylinder cavity from the side of the spring, which increases the force of action.

To transmit rotation to the cutting tool, pressure is applied to the working cavity of the hydraulic cylinder 18 for connecting the electric motor to the kinematic chain of rotation of the spindle of one of the tool blocks. Its piston moves the clutch 19 to the left until it closes with the shank of the spindle of the tool block, to which rotation is transmitted through bevel gears 27, 28.

At the end of the processing cycle, the motor rotor is set to its initial position by the feedback sensor. The coupling 19 is disengaged from the shank of the spindle of the tool block.

Claims (2)

1. A multi-position tool head comprising a body, a tool disk having a possibility of rotation relative to the body, tool blocks mounted on a tool disk, an electric motor capable of alternately connecting with a kinematic chain of rotation of the tool disk and a kinematic chain of rotation of the spindle of one of the tool blocks, a hydraulic cylinder for connecting an electric motor with a kinematic chain of rotation of the tool disc, feedback sensor for Rola angular position of the tool disc, characterized in that it is provided with a floating position of the tool clamps the disc relative to the housing, for removing floating cylinders and cylinder clamps for connecting the motor to the kinematic chain of the rotation spindle of one of the tool blocks. 2. The head according to claim 1, characterized in that it is equipped with a cross-roller bearing, the inner ring of which has end teeth for interacting with said floating locks and is rigidly connected to the housing, and the outer ring consists of two rigidly connected parts, one of which is rigidly connected to the tool disk and has a gear ring included in the kinematic chain of rotation of the tool disk, and the second has end teeth for interaction with the said clamps.

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