CZ299898B6 - Positioner, particularly machining center horizontal table positioner - Google Patents

Abstract

The present invention relates to a positioner, particularly machining center horizontal table positioner wherein the positioning table (1) is rotatably mounted in a mounting frame and is provided with an arrestment disk (2) and a worm wheel (8) co-axially arranged therewith (6), which worm wheel is engaged with a driving worm (3). A linear element, provided at its one end with radial projections (16) for rotatable connection with a spindle (13) and axial projections (177) arranged on the worm (3) body, passes through axial bore hole of the driving worm (3) wherein at the other end said linear element bears on the end of am arrestment lever (4) control lever (5).

Description

Technical field p

The invention relates to a position adjusting device, in particular a horizontal positioning table of machining centers, wherein the positioning table is mounted rotatably in a support frame and is provided with a locking disk and coaxially arranged worm wheel, which engages a drive worm.

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BACKGROUND OF THE INVENTION

The positioning table, eg horizontal positioning table, is used for positioning workpieces, eg for machining them on MCV series machining centers. At present, numerical rotary tables are used for positioning workpieces, which are connected to the power supply via additional supply lines for their operation. cables or supply lines. These additional cables or lines in themselves complicate the arrangement of the machining centers and thus make them more expensive.

Also known are devices for positioning the positioning table of production machines, wherein the semi-rotating table is mounted rotatably in a support frame and is provided with a locking disc and coaxially arranged with a worm wheel which engages the drive worm. The disadvantage of these existing devices is the relatively complicated way of controlling the locking and adjusting of the positioning table.

The object of the present invention is to design a positioning table whose rotation is achieved in a simple manner. without the use of a foreign source of energy, respectively. sources outside the control source, eg a machine tool.

SUMMARY OF THE INVENTION

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The essence of the positioning table, in particular the horizontal positioning table of the machining centers, according to the invention consists in this. The axial bore of the worm passes through a linear element provided at one end with radial projections for pivotal connection with the spindle and with the axial projections arranged on the body of the worm, the linear element abutting on the opposite end of the control lever of the arresting lever.

The linear element is formed by a thrust piston and thrust rod, wherein the space between the thrust piston and thrust rod is connected by drilling in the thrust rod to the space of the multiplier in which the de-piston is arranged. the piston rod extending into the space connected to the brake of the positioning table, into which it is pressed by a compression spring, for example a set of disc springs.

The advantage of the positioning table according to the invention is its simplicity of construction and its operation utilizes the energy of the machine for handling the parts which are coated with the table.

Overview of the drawing

The attached figure shows the hydraulic and kinematic diagram of the parts of the positioning table.

Example)

The positioning table J is rotatably connected to the support frame via a friction clutch and a brake 11. Brake JJ obsa? There is a space for filling with brake fluid which, when pressed, acts on the resilient part of the brake 11 which contacts the friction clutch which is pressed against the positioning table 1 and thereby brakes the positioning table 1 with respect to the support frame. The brake fluid pressure is exerted by means of a lining 9 on which the disk spring assembly 14 acts. In the pivoting axis of the positioning table 1, a locking disc 2 and a worm wheel 6 are mounted in the support frame. The worm wheel 6 also engages a worm 3 which is also supported in the support frame, the worm axis 3 being perpendicular to the pivot axis. The screw body 3 is provided with an axial bore, in which a linear element consisting of a pushing piston 7 and a pushing rod 8 is slidably mounted. The space in the axial bore between the pushing piston 7 and the pushing rod 8 is connected via a bore in the pushing rod 8 to the space Multiplier, and these spaces are filled with control fluid. Lower part of the space J 5 i? The multiplier forms the upper part of the relief piston 10, whose piston rod 9, as already mentioned, is sprung by a set of disc springs 11. The lower end of the push rod 8 bears on a pivoted operating lever 5, the other end of which rests on the locking lever 4. The opposite end of the locking lever 4 is provided with a tooth which engages in a recess in the locking disc. 2. The locking lever 4 is also pivoted and its end opposite the toothed end is a compression spring 11. by means of which the locking lever 4 with the tooth is held in the locked position.

The piston 7 extends with its upper end from the screw body 3 and has radial projections 16 at its upper end, the screw body 3 having axial 25 projections 11 at its upper end. Above the push rod 7 is shown the spindle 11 of the machine tool.

In the position shown, the positioning table 1 is braked in one of the possible mounting positions, wherein the tooth of the locking lever 4 extends into one of the recesses in the locking disk 2.

If it is necessary to move the positioning table J to a new position, the machine spindle J3 moves over the pressure piston 7 and then moves downwards towards the push rod 7. By moving the push rod 7 the control fluid is pushed out of the space between the push rod 7 and the push rod 8 into the space 11 of the multiplier and the relief piston 10 with the piston rod 9 is pressed down against the action of the disc springs 14. This will reduce the brake fluid pressure in the brake 11 and release the positioning table 1.

Subsequent further downward movement of the machine spindle 13 engages the pressure piston 7 on the pressure rod 8, which it moves while simultaneously swiveling the control lever 5 and the locking lever 4, the tooth of which disengages from the recesses of the locking or disc 2.

In the position where the toothing of the locking plate or disc 2 is out of engagement with the recess of the plating disc 2, the radial projections 11 of the push rod 7 reach between the axial projections 11 of the screw body 3. In this position, the positioning table 1 is released. This is followed by rotation of the machine spindle 13, the engagement of the radial projections 11 of the push rod 7 with the axial projections 11 of the worm body 3 causes the worm gear 6 to rotate and thus the positioning table 1, which is non-rotatably connected to the worm wheel 6. With the worm gear 1.40 the rotation of the positioning table I corresponds to Γ the rotation of the spindle JJ by 40 °.

After the desired rotation of the positioning table j, the machine spindle 13 is adjusted upwards and the pressure on the pressure piston 7 is released. As a result of the compression springs 11, the relief piston 10 is moved upwards with the piston rod 9, the control fluid flows into the space between the pressure piston 7 and the piston. a push rod 8, the piston rod 9 pushing the brake fluid into the brake 11 to brake the positioning table L

Claims (3)

ΓΝ A K U K ¥ 5 1. A position adjusting device, in particular a horizontal positioning table of machining centers, wherein the positioning table (1) is mounted rotatably in a support frame and is provided with a locking disc (2) and coaxially arranged worm gear (6) therewith with drive screw (3). characterized in that the axial bore of the screw (3) extends through a linear element provided at one end with radial projections (16) for pivotal connection with the spindle (13) and axial projections (17) arranged on the body of the screw (3), a linear element for the end of the control lever (5) of the locking lever (4). Positioning table according to claim 1, characterized in that the linear element is formed by a push piston (7) and a push rod (8), the space between the push piston (7) and the push rod (8) sweating only by drilling in the push rod (8) with a multiplier compartment (15) in which a relief piston (10) is provided, the piston rod (9) of which extends into a space communicating with the brake (II) of the positioning table (1). 3. A positioning table according to claim 2, wherein the positioning table is as shown in FIG. The spring (9) of the piston rod (9) bears against the compression spring (14).