SU876358A1 - Device for clamping parts - Google Patents

Description

(54) DEVICE FOR CLAMPING PARTS ON THE CIRCUIT

I

The invention relates to the machining of materials, namely, devices for securing parts machined along a contour on milling and drilling machines.

A device is known for clamping knobs processed along a contour consisting of a base plate placed on the movable part of the machine, by-pass clamps installed around the contour of the part, a clamp control system comprising a turning cam and controls (| /.

This device is complicated and has rather large dimensions, which is caused by the location of control elements (spools) in the design of each clamp. This limits the ability to locate the drims on the machine table in the required quantities and limits the cutting zone. The reliability of the device is low, it is determined by the fact that the cam, the controls (spools) and. other moving parts are in the cutting zone and must work in adverse conditions, in the presence of chips and coolant the safety of work is also reduced). The disadvantage of the device is

and the impossibility of automatic operation of all the clamps at the same time in the process of loading and unloading parts (due to the fact that the cam is connected to the cutter and the clamps of the clamps are spaced from each other for considerable distances, so that spools at the same time).

The purpose of the invention is to simplify the design, increase the reliability of the device and the ability to automate

... clamping and unclamping parts in the process of loading and unloading.

The target is reached due to the fact that the device is equipped with a spring-loaded pusher and a hinge-lever-pantograph with a radially movable floor J5, which is connected to the movable part of the machine and is kinematically connected to the pusher and the cam located on the base plate outside the cutting area while the cam is mounted with the possibility of axial movement and is made in the form of a two-stage roller, the smaller stage of which is equipped with a protrusion, and the radius of the larger stage is equal to the outer radius of the protrusion of the smaller stage.

FIG. I shows the device, obiy view; in fig. 2 - section AA one; in fig. 3 shows a section BB in FIG. one.

The device consists of a base plate 1, installed on the table 2 flock, branch, automatically operating (pneumatic, hydraulic, electromechanical, etc.). clamps 3, located along the contour of the part in T-shaped grooves, the radial direction of which is determined by the crosspoint located inside the contour of the part to be machined.

On the base plate 1, outside the cutting zone, control elements 4 are installed, which interact with the rotary cam 5 and are located relative to the center of the cam in accordance with the radial position of the clamps 3 relative to the conventional point of the part contour being machined.

The rotary cam 5 through a kinematic connection, such as a flexible shaft 6, is connected to the axis of the crankshaft 7, installed in the bracket 8, mounted on the movable part of the machine 9.

The slider 10 of the crank mechanism is pivotally connected to the axis of the pole of the decreasing hinged-lever pantograph 11, the center of which is pivotally fixed on the bracket 8, and the pole of the pantograph is pivotally connected to the table 2 of the machine.

The cam 5 is made in the form of a two-stage roller, at a smaller stage of which the protrusion 12 of the successive control of the presser 3 is located, and the radius of the larger stage 13 is equal to the outer radius of the protrusion and serves to simultaneously act on all the elements of the control 4.

The cam 5 has the ability to move along the axis and is kinematically connected, for example, by means of a cable 14 with a spring-loaded pusher 15 placed in the center of the crank 7.

For manual control of the cam longitudinal movements, a lever 16 is provided in the device.

The contour of the part is machined with a milling cutter 17 ..

The device works as follows. (

In the initial position, the table 2 of the machine with the base plate 1 is set relative to the cutting tool in the position of the conditional center of the workpiece contour. In this case, the slider 10 acts on the plunger 15, which through the kinematic link moves the cam 5 downwards. Stage 13 of cam 5 simultaneously interacts with all control elements 4, giving a signal to unclamp and retract all clamps 3.

Manual or automatic loading of parts using the manipulator.

When the working table 2 of the machine moves through the hinge-lever pantograph 11, the slider 10 releases the pusher 15 by moving the cam 5 up through the kinematic link and withdrawing its cylindrical step 13 from the interaction with the control elements 4, except for one, which the protrusion 12 continues to act on fist. In this case, the control elements issue a command to feed the clamps and clamp the part, leaving the clamp in the tool area in the tilted state.

When moving the table 2 of the machine along the contour of the workpiece articulated arm pantograph 11 moves the slider

10 of the crank 7. The crank rotates and through the flexible shaft 6 rotates the cam 5, which, with its protrusion, sequentially acts on the elements 4 of the control, unclamping and releasing the part

in the area of the instrument.

Thus, the automatic control of the clamp-release of the discharge clamps during the machining of the part is carried out. along the contour.

At the end of the work, the machine table returns to its original position, it is carried out by expanding the part and changing it. If necessary, the part is unclamped is clamped in any zone of the contour by means of the lever 16 for manual longitudinal movement of the cam 5.

The proposed device is applicable for milling and drilling machines with both manual and programmed control of the movement of the machine table in the longitudinal and transverse directions.

Thanks to the invention, the design of the device is simplified and reliable automatic machining of parts along the contour is ensured.

Claims (1)

Invention Formula A device for clamping parts machined on a contour consisting of a base plate placed on the movable part of the machine, diverting clamps mounted on the contour of the part, a clamp control system containing a turning cam and control elements that are different simplify design and increase reliability and automation of work, the device is sabzhenno spring-loaded pusher and a toggle-lever pantograph with a radially movable slider, which is connected to the movable part of the flock and kinematically CB $ fan with the pusher and cam placed on the base plate outside the cutting zone with the possibility of axial movement and is made in the form