SU755494A1 - Apparatus for moving and clamping movable assembly of machine relative to stationary assembly - Google Patents

Description

The invention relates to the field of machine tools.

There are known devices for moving and clamping a movable machine unit relative to a stationary one, including two straight-line guides fixed on the latter, one of which has the shape of a trapezium, and pressure plates with a clamping mechanism [1]. ten

A disadvantage of the known device is reduced purity and accuracy of processing due to the lifting and turning of the movable node under the action of cutting forces. 15

The purpose of the invention is to improve the accuracy and rigidity with lateral loads.

For this, the second guide is made in the form of an inclined plane- 20, directed in the same direction as the side edge of the trapezoidal guide, with the side face located on the side of the action of lateral loads, and the clamping mechanism 25 is made in the form of a sloped cylinder guide, the stem of which is connected to the inclined guide and has a wedge lip at its end,

2

moreover, the pressure plates are provided with inserts _; interacting with the wedge flat and the base of the inclined guide.

FIG. 1 shows a general view of the proposed device? FIG. 2 shows the node I in FIG. one.

The device includes a housing 1, on which the table 2 is movably mounted, carrying two guides 3 and 4. On the guides 3 and 4, a carriage 5 is mounted for movement with pressure bars 6 and a clamping mechanism 7. On the carriage 5 milling headstock is fastened with the drive of the main movement, which are not shown in the drawing.

Guide 3 has a trapezoidal profile with side 8 and main 9 working edges, and guide 4. represents an inclined plane) directed in the same direction as side edge 8 of guide 3. Side edge 8 is located on table 2 from the side of side loads arising from milling parts. ·

Guide 4, which covers the clamping strips 6, is located on the side of the table 2. Mechanism 7

3

755494

four

clamp is made in the form of built-in clamping strips 6 on the side of the inclined plane of the guide 4 of the cylinder 10 (see Fig. 21, the rod 11 of which, using the wedge flat 12 made therein and the insert 13, interact with the guide 4.

In the described embodiment, as an inclined flat guide 4, a guide with a triangular profile is used, the outer face of which is inclined at an angle of 45 °, and the trapezoidal guide 3 is made in the shape of a dovetail with an angle of 55 * between the lateral 8 and the main 9 faces.

The principle of operation of the proposed device for moving the moving angle clamp is as follows.

Using the drive (not shown), the carriage 5 e with the clamping bars 6 and the clamping mechanisms 7 moves along guide 3, 4 relative to the table 2. At the same time, the carriage 5 with elements and mechanisms attached to it under the action of the component weight forces is inclined under an angle of 45 ° to the plane of the guide 4 eliminates gaps in the guides 3.4 and creates a constant preload in all the working faces of the direction-. 3,4, including in the side face 8 of the trapezoidal guide 3.

Under the action of external forces or cutting forces that occur during face milling of parts in the lateral direction from the side edge 8 installation side of the trapezoidal rail 3, the carriage 5 is pressed against the working faces 8, 9 of the rail 3 and to the inclined plane of the rail 4.

Since all the gaps in the guides are 3,

4, and the working faces 8, 9 of the guide 3 and the inclined plane of the guide 4 are constantly under preload, then the positioning of the carriage 5 on the guides · 3, 4 as a result of additional contact deformations from the action of the lateral cutting forces does not occur.

When clamping the carriage 5, the rod 11 of the cylinder 10 with the WEDGE LYSSA 12 pushes insert 13 up to the stop in the base 14 of the guide 4 from the side of the working inclined plane of the guide 4 (figure 1).

In this case, the forces during the clamping of the carriage 5 are directed exactly as the forces that created the preload of the carriage 5 in the working faces of the guides 3, 4, and therefore there is practically no change in the position of the carriage 5 during the transition from the depressed state to the clamped one, and therefore a high position accuracy when clamping the carriage 5

The clamping forces pressing the carriage 5 to the inclined plane of the guide 4 simultaneously clamping the carriage 5 in mutually perpendicular directions, thereby ensuring high position accuracy when clamping the carriage 5 and increasing the resistance to the longitudinal shift of the carriage 5 on the guides 3, 4.

Claims (1)

Claim A device for moving and clamping a movable unit of a machine relatively stationary, including two straight-line guides fixed on the latter, one of which has the shape of a trapezium, and clamping strips, with a clamping mechanism, in order to increase the accuracy and rigidity with lateral loads, the second guide is made in the form of an inclined plane directed in the same direction as the lateral face of the trapezoidal guide, with the lateral face located on the side of the action of lateral loads, and the mechanism Agim configured as a built-in clamps from the inclined guide cylinder, the rod of which is associated with the inclined guide and has a wedge-shaped flattenings at its end, wherein the clamping bars are provided with inserts cooperating with a wedge clamping flat base and a sloping guide.