SU948604A1 - Circular motion table for metal cutting machine tools - Google Patents

Description

The invention relates to the field of machine tools, in particular, to the tables of circular movement for continuous operation of CNC machines.

Circular motion tables for machine tools are known, comprising a housing on which the faceplate is installed, and a rotational drive thereof, the driving element of which is pivotally located in the housing, and the slave is rigidly mounted on the faceplate, both of which are mounted coaxially with the last fi.

A disadvantage of the known stitches is their low productivity.

The purpose of the invention is to increase the productivity and efficiency of the table.

To do this, the drive is equipped with cranks located in the housing evenly circumferentially rotatable, and a gear wheel mounted on the cranks with the possibility of plane-parallel motion, the driven element is designed as a roller in rolling bearings evenly spaced around the circumference of the face plate with the axis of their rotation, parallel to the axis of the faceplate, and the leading element is made with an outer surface, an eccentric axis of rotation, and

the gear wheel is installed with the possibility of contacting the inner surface with the eccentric surface of the driving element, and the crown with the rollers of the driven element, and the eccentricities of the cranks and the outer surface of the driving element are equal.

ten

FIG. 1 shows a longitudinal section of the table; in fig. 2 shows section A-A in FIG. one.

The circular motion table includes a housing 1 on which

15 faceplate 2 with drive. The drive of the faceplate 2 is a follower element consisting of a cup 3, a cover 4 and rollers 5, evenly spaced around the circumference and mounted on the rolling bearings 6. The latter are mounted in the glass 3 and the lid 4. The glass 3 is fixed on the faceplate 2 coaxially with its rotation.

Claims (2)

The gear wheel 7 of the drive is made with two gear rims 8 and 9. The rims 8 and 9 are installed with the possibility of creating tension on the mesh with the rollers 5. The tension between the rollers 5 and the teeth of the rims 8 and 9 ensures the reversal of the latter relative to each other. another by means of screws 10 and 11. The wheel 7 is mounted on the eccentric surface of the driving element, made in the form of carrier 12, and connected to the body 1 by curved spikes 13. In this case, the eccentricity of the curvature 13 is equal to the eccentricity of the carrier 12. The gear rim 14 is driven 12 dits in gearing with a pole This device is mounted on the shaft 16 of the electric motor 17. The work of the circular movement table is carried out as follows. The electric motor 17 through the gear 15 and the gear rim 14 rotates the carrier 12. The rotation of the carrier 12 is converted into plane-parallel movement of the wheel 7 around the circumference with a radius equal to the eccentricity of the carrier 12. The gear wheel 7 for each revolution of the carrier 12 runs around the driven element and turns evenly his and his faceplate 2. The gear ratio of the transmission depends on the difference in the number of teeth of the scaffold 7 and the rollers 5. The backlash-free transmission of the moment is ensured by a preliminary reversal of the rims 8 and 9 to create tension. The magnitude of the tension is chosen from the condition that there is no gap in the gear transmission at maximum torque. The advantage of the proposed table is the absence and transfer of friction sliding elements, which allows for tensioning between the drive teeth and the wheels of the driven wheel and thereby ensuring smooth back torque transmission. The transmission has a high load capacity due to the participation in the work of Te of a large number of rollers. The backlash-free transfer of torque and the high load capacity of the mechanism allow contour processing on the table with progressive cutting conditions while maintaining the required purity and machining accuracy, which improves productivity. The high efficiency reduces the energy consumption of the table drive when machining parts. The invention of the circular motion table for machine tools, comprising a body on which the faceplate is installed, and a rotation drive thereof, the driving member of which is pivotally arranged in the body, and the follower is rigidly mounted on the faceplate, both of which are mounted coaxially to the latter, differing in that, in order to increase the productivity and efficiency of the table, the drive is equipped with cranks located in a housing that is uniformly circumferentially rotatable and a gear wheel mounted on the cranks with the possibility of plane-parallel movement, the driven member is made in the form of rollers on rolling bearings, evenly spaced around the faceplate with the axis of their rotation parallel to the axis of the faceplate, and the driving element is made with the outer surface of the eccentric axis of rotation, and the gear wheel is installed with the inner surface in contact with the eccentric surface of the master element, and the Nenets with the rollers of the slave element, and the eccentricities of the cranks and the outer surface of the master element are . Sources of information taken into account during the examination 1. Leschenko V.A. Machine tools with numerical control, Mashinostroenie, 197E, p. 95, p. 3.25.