CN106312592A - Hollow turntable - Google Patents

Abstract

A workbench 1 is fixedly connected with a mandrel 6, the mandrel 6 is fixedly connected with a torque motor rotor 7, a screw I11 penetrates through a pressing plate 20, a radial raceway 5a of a turntable bearing and a thrust washer 5c of the turntable bearing to be fixedly connected with the mandrel 6, a pneumatic clamp 4 is concentric with the mandrel 6, is sleeved on the outer side of the mandrel 6 and is fixedly connected with an upper flange 2, the upper flange 2 and a torque motor stator 9 are respectively and fixedly connected with a turntable body 21, a radial raceway 5b of the turntable bearing is fixedly connected with the turntable body 21 through a screw II 11, a lower flange 19 is fixedly connected with the turntable body 21, and a flange sleeve 14 is fixedly connected with the lower flange 19. The invention has the advantages of high rotating speed, full closed-loop control and safe and environment-friendly locking mode. The hollow workbench can expand the processing range of the traditional vertical processing center and meet the processing requirements of shafts or other parts with larger length-diameter ratio.

Description

Hollow turntable

technical field

The invention relates to a hollow turntable, in particular to a C-axis hollow turntable for machine tools

Background technique

The turntable is an important functional part of the machining center. Its rotary motion is linked with other linear axes to process various complex curved surfaces or special-shaped parts. The supporting machining centers have been widely used in modern military and aerospace industries. The existing turntable adopts a center positioning structure. There is a positioning center hole in the center of the workbench, and its lower part is connected with the rotating part of the rotary encoder. The rotary encoder is fixed on the base body through the encoder support, and the lower part of the base is sealed with a base cover plate. For some parts with relatively large long-diameter or long length but only partially need to be processed, the turntable of this design method can only be installed above the work table, so it is necessary to make fixtures with high height or complex structure for fixing, which increases the processing time. Difficulty, and lost the stroke of the linear axis (as shown in Figure 1).

Contents of the invention

The technical problem solved by the invention is to overcome the deficiencies of the prior art and provide a C-axis hollow turntable for machine tools.

The technical solution adopted in the present invention is a hollow turntable, the worktable is fixedly connected to the mandrel, the mandrel is fixedly connected to the rotor of the torque motor, and the screw passes through the pressure plate, the centripetal seat ring of the turntable bearing and the thrust washer of the turntable bearing are fixedly connected to the mandrel , the pneumatic clamp is concentric with the mandrel, set on the outside of the mandrel, and is fixedly connected with the upper flange, the upper flange and the torque motor stator are respectively fixedly connected with the turntable body, and the turntable bearing to the mandrel ring is connected to the turntable body through the second screw Fixed connection, the lower flange is fixedly connected to the turntable body, and the flange sleeve is fixedly connected to the lower flange. The rotor of the torque motor rotates, driving the mandrel to rotate and the worktable to rotate. The radial and axial forces on the workbench are transmitted to the turntable body through the turntable bearing, and the pneumatic clamp can lock the mandrel.

A dust-proof ring is arranged between the working table and the upper flange. A V-shaped ring is arranged between the mandrel and the flange sleeve, and a cover plate is installed at the lower end of the turntable body. The flange sleeve is provided with an air-tight vent hole, and an expansion plug is arranged inside. These seals can prevent dust, water and other impurities from entering the interior of the turntable, affecting the accuracy and service life of the turntable.

The reading head is fixedly connected with the lower flange. The rotary magnetic scale is fixedly connected to the mandrel. The readhead and rotating magnetic scale are used for magnetic scale detection of the C-axis rotary rotary feedback.

The beneficial effect of the present invention is that the hollow turntable of the present invention has high rotational speed, fully closed-loop control, and the locking method is safe and environment-friendly. Because the workbench is hollow, the processing range of traditional vertical machining centers can be expanded to meet the processing of shafts or other parts with relatively large length and diameter.

Description of drawings

Fig. 1 is the structural representation of the turntable of prior art of the present invention;

Fig. 2 is a schematic structural view of the hollow turntable of the present invention.

Marked in the figure: 1-table, 2-upper flange, 3-dust ring, 4-pneumatic clamp, 5-turntable bearing, 6-mandrel, 7-torque motor rotor, 8-adjusting pad, 9-torque motor stator, 10-screw 1, 11-screw 2, 12-cover plate, 13-expansion plug, 14-flange sleeve, 15-reading head, 16-rotary magnetic scale, 17-V-shaped ring, 19-Lower flange, 20-Press plate, 21-Turntable body, 5a-Turntable bearing radial seat ring, 5b-Turntable bearing radial shaft ring, 5c-Turntable bearing thrust washer

detailed description

The present invention will be further described below in conjunction with accompanying drawing.

In the hollow turntable shown in Figure 2, the worktable 1 is fixedly connected to the mandrel 6, the mandrel 6 is fixedly connected to the torque motor rotor 7, and the screw 11 passes through the pressure plate 20, the centripetal seat ring 5a of the turntable bearing and the thrust of the turntable bearing. The gasket 5c is fixedly connected with the mandrel 6, the pneumatic clamp 4 is concentric with the mandrel 6, sleeved on the outside of the mandrel 6, and fixedly connected with the upper flange 2, the upper flange 2 and the torque motor stator 9 are respectively connected with the turntable body 21 Fixed connection, turntable bearing centripetal shaft ring 5b is fixedly connected with turntable body 21 through screw 2 11, lower flange 19 is fixedly connected with turntable body 21, and flange sleeve 14 is fixedly connected with lower flange 19. The rotor of the torque motor rotates, driving the mandrel to rotate and the worktable to rotate. The radial and axial forces on the workbench are transmitted to the turntable body through the turntable bearing, and the pneumatic clamp can lock the mandrel.

A dustproof ring 3 is provided between the workbench 1 and the upper flange 2 . A V-shaped ring 17 is arranged between the mandrel 6 and the flange sleeve 14 , and a cover plate 12 is installed at the lower end of the turntable body 21 . The flange sleeve 14 is provided with an airtight air hole, and an expansion plug 13 is provided inside. These seals can prevent dust, water and other impurities from entering the interior of the turntable, affecting the accuracy and service life of the turntable.

The reading head 15 is fixedly connected with the lower flange 19 . The rotary magnetic scale 16 is fixedly connected with the spindle 6 . The readhead and rotating magnetic scale are used for magnetic scale detection of the C-axis rotary rotary feedback.

The beneficial effect of the present invention is that the hollow turntable of the present invention has high rotational speed, fully closed-loop control, and the locking method is safe and environment-friendly. Because the workbench is hollow, the processing range of traditional vertical machining centers can be expanded to meet the processing of shafts or other parts with relatively large length and diameter.

Claims (9)

1. hollow type turntable, it is characterised in that: workbench (1) is fixing with mandrel (6) to be connected, mandrel (6) and torque motor rotor (7) fixing connection, screw one (10) is through pressing plate (20), the centripetal seat ring of turntable bearing (5a) and turntable bearing thrust washer (5c) Fixing with mandrel (6) and be connected, pneumatic gripping (4) is concentric with mandrel (6), is enclosed within mandrel (6) outside, and solid with upper flange plate (2) Fixed connection, upper flange plate (2) and torque motor stator (9) are fixing with turntable body (21) respectively to be connected, the centripetal blowout patche of turntable bearing (5b) being connected by screw two (11) and turntable body (21) are fixing, lower flange (19) is fixing with turntable body (21) to be connected, flange Set (14) is fixing with lower flange (19) to be connected.

Hollow type turntable the most according to claim 1, it is characterised in that: it is provided with between workbench (1) and upper flange plate (2) Dust ring (3).

Hollow type turntable the most according to claim 1, it is characterised in that: read head (15) is fixing with lower flange (19) even Connect.

Hollow type turntable the most according to claim 1, it is characterised in that: rotate magnetic railings ruler (16) fixing with mandrel (6) even Connect.

Hollow type turntable the most according to claim 1, it is characterised in that: it is provided with V-arrangement between mandrel (6) and flange sleeve (14) Ring (17).

Hollow type turntable the most according to claim 1, it is characterised in that: mandrel (6) and torque motor rotor (7) are provided with tune Whole pad (8).

Hollow type turntable the most according to claim 1, it is characterised in that: cover plate (12) is installed in turntable body (21) lower end.

Hollow type turntable the most according to claim 1, it is characterised in that: flange sleeve (14) offers hermetic seal passage.

Hollow type turntable the most according to claim 8, it is characterised in that: it is provided with in the hermetic seal passage of flange sleeve (14) Swollen stifled (13).