SU659294A1 - Tool mandrel clamping device - Google Patents

Description

one

The invention relates to a machine tool industry and can be used on drilling, boring and other CNC machines.

Devices for clamping a tool holder in a CNC cutting machine are known, which include a sleeve installed in the ntlindel with the ability to be moved on it, and clamping elements 1.

The known devices for the tool holder can only be used on machines with a vertical spindle, since moving the tool holder with the tool to the Pickup position — with repeated machining — is only possible due to gravity. The latter is an element of insecurity upon returning to the pickup position. The known device, in addition, has an imperfect and extended cycle of installation and change of the tool holder with the tool. After discarding the mandrel with the tool to be replaced, and during the entire installation or replacement operation, the device is in the unfolded position. An instrumental mandrel with a tool after entering the spindle in both manual and phi automatic loading must be held externally until the lock does not take place for the clamping elements, which do not interfere with the corresponding H1 command from the release position) to the pickup position.

The purpose of the invention is to increase the reliability and performance of the device.

For this, the device is equipped with a dimensioned H1, spring-loaded pusher in the sleeve, the outer diameter of which is equal to

outer diameter of the shank head

tool holder, and emphasis for

contact with the shank of the latter at a certain point when the liner is moved.

FIG. 1 shows the proposed device in the tool suspension position; in fig. 2 - various phases of operation of the device and the sequence diagram of positions.

The movable sleeve 1 is placed in the housing of the spindle 2 of the drilling head 3 and

carries the clamping elements 4 and the spring-loaded pusher 5, which is pressed in the initial position by the spring 6 to the stop 7 made in the movable sleeve 1. In the case of spindle 2 there is a stop ring 9 supported by spring 8. At the end of spindle 2 there are end keys 10. In The conical hole of the spindle 2 is located along the cylindrical along the shaft and end keys 10 of the instrumental mandrel 11, drying the tool 12. The instrumental mandrel 11 is equipped with a shank 13. The spring-loaded pusher 5 is made equal to the outer diameter m Narula Nome diameter of the head of the shank 13. At the drill head 3 is placed switching system 14, contacting instrumentalyshy mandrel 11 and providing issuing commands to switching movement speed of the drill head 3 and the clamping of the tool holder 11.

There are four phases in the operation of the device:

initial position;

tool suspension position;

clamping position;

tool ejection position.

In the initial position of the device (Fig. 2, phase 1), the spring-loaded pusher 5 is pressed against the stop 7 by the spring 6. The spring ring 9 under the action of the spring 8 presses the clamping elements 4 to the outer diameter of the spring-loaded pusher 5.

To install the tool holder 1 1 (at the beginning of the work), the movable sleeve 1 from the initial position, for example by means of a hydraulic cylinder, is moved to the tool suspension position. The locking ring 9 remains at the same time pressed by the spring 9 to the clamping elements 4, which abuts against the spring-loaded pusher 5.

The tool holder 11 with the tool 12 located therein is outputted to the spindle 2, guided along the barrel and face pins 10. As the tooling holder advances And into the spindle 2, the head of the shank 13 with its end comes in contact with the push rod 5 and presses it, squeeze spring 6, inside the movable sleeve 1, since the head of the shank 13 of the tool holder 11, replacing the spring-loaded pusher 5, freely enters the movable sleeve 1. When under the clamping elements 4 there is the neck of the shank 1 3, understated relative to the head, clamping elements 4 are sunk, skipping the locking ring 9, rushing under the influence of the spring 8 to the stop in the spindle 2. As a result, the clamping elements 4 of the shank 13 are snapped in, and the tool holder 11 has not yet tangled pin 2, hangs with the tool 12 on the clamping elements 4 of the movable sleeve 1 (Fig. 2, phase II).

Then the drill head 3 with the illuminated tool 12 quickly moves onto the product. When the tool 12 touches the surface of the product, the translational movement of the tool holder 11 with the tool 12 is stopped, and the drilling head 3 continues to move at high speed, selecting the clearance

between the landing cone of the spindle 2 and the outer cone of the tool holder 11. During this relative stroke, the switching system 14 is activated and issues a command to brake and change to the working feed, as well as to the clamp of the tool holder 11. The latter are carried out by moving the movable sleeve 1, for example, a spring (not shown in the drawings), in the direction opposite to the movement of the drilling head 3. The movable sleeve 1 by the clamping elements 4, which are in contact with the locking ring 9 and the shank 13, tightens

tool mandrel And tool 12 on the cone of spindle 2 (Fig. 2, phase III).

After tightening the tool holder And tool 12 at the working feed

makes the processing of the product.

After filing processing and withdrawal of the tool from the product, preparation for the next cycle begins. This is due to the fact that the movable sleeve 1, receiving

In the same way, moving in the direction of ejection, during its movement it acts with an emphasis 7 on the head of the shank 13 of the tool holder I and forcibly knocks it from the cone of the spindle 2

(this phase of work in Fig. 2 is not shown).

If the movable sleeve stops at the tool hanger position, the tool holder AND hangs on the clamping members 4; if movable

Since the sleeve 1 reaches the tool ejection position, the tool changer 11 for the tool change can be freely removed from the spindle 2.

When removing the tool holder

11, the spring-loaded pusher 5 is replaced by the head of the shank 13. The spring-loaded pusher 5 under the influence of the spring 6 follows the head of the shank 13, bursting the clamping elements 4,

which are dispensed in this position (ejection position) all the way into the locking ring 9, and fixes them (Fig. 2, phase IV). In this state of the clamping elements 4, the movable sleeve 1 is moved, for example, by a spring to the tool hanger position (for receiving the next tool holder) or to the initial position.

Claims (1)

Invention Formula A device for clamping the tool help in the metal cutting rod A CNC machine that contains a sleeve installed in the pinch with movement and a carrier clamping elements, characterized in that, in order to increase productivity and reliability, the device is equipped with a spring-loaded pusher placed in the sleeve, the outer diameter of which is equal to the outer diameter of the shank head of the tool holder, and an abutment for contacting the shank of the latter at a certain point: displacement of the sleeve. Sources of information taken into account in the examination 1. Barun V. A. and others. Machine tools with program control and programming processing. - M., Mashinostroenie, 1965, p. 313. 12  ./: on the position of 6y5aras ynstrom a / pa g