Automatic rotary calibration processing unit (plant)
Technical field
The present invention relates to a kind of machining fixture.The present invention is applicable to the machining fixture of the critical component such as valve, valve gap.
Background technology
In the man-hour that adds of the critical components such as valve, need to process respectively valve seat mount pad in each end face of valve body, passage and valve body.At present, adding man-hour to each end face, passage, valve seat mount pad in valve body, when an end face and one end passage and side valve seat mount pad process, valve body be unloaded from lathe the clamping again that turns around, then the end face of the other end and passage and valve seat mount pad are processed.One of its shortcoming is: clamping process affects valve body process velocity, and working (machining) efficiency is low; Two of its shortcoming is: each clamping all location errors, produces coaxial error, affect valve body machining accuracy to the processing of two valve seat mount pads in valve body two end faces and valve body.
Summary of the invention
The object of the invention is the shortcoming existed for prior art, provide a kind of clamped one time to realize the whole machined surface of valve body, working (machining) efficiency is high, automatic rotary calibration processing unit (plant) that Product Precision is high.
Technical scheme of the present invention comprises chuck, claw, and claw is made up of upper clipping claw and lower claw; Mainly upper clipping claw is movably arranged in the axis hole of clamping piston by installation shaft, and clamping piston is arranged in the clamping cylinder on chuck; Lower gripper is connected with the shaft hole matching on rolling disc by installation shaft, and rolling disc is axially arranged on chuck by locating piece, and rolling disc is radial to be coordinated with chuck installing hole inwall is dynamic; Polygon cylinder is made at rolling disc external cylindrical surface middle section position, the chuck of polygon cylinder side is provided with the first oil cylinder and the second oil cylinder, first in-oil cylinder first piston end and the second in-oil cylinder second pistons end extend in a plane of polygon cylinder respectively, and first piston and the second piston adopt hydraulic system interaction to control.
In above technical scheme, the side of first piston and the second pistons end is shaped with the inclined-plane cooperatively interacted with the plane of polygon cylinder respectively, and the opposite side of first piston end is shaped with the inclined-plane parallel with the second pistons end inclined-plane.
In above technical scheme, between rolling disc radial direction and chuck installing hole inwall, journal bearing is housed, between rolling disc end face and chuck installing hole bottom surface, plane bearing is housed; Installation end spherical bearing between the installation shaft end face of upper gripper and the axis hole bottom surface of clamping piston.
The present invention's beneficial effect is compared with prior art that workpiece is installed on rolling disc by gripper by clamping cylinder, rolling disc adopts the first oil cylinder and the second oil cylinder pushing to rotate, clamped one time can complete the processing of multiple, decrease the clamping workpiece time, avoid clamping workpiece error, have that working (machining) efficiency is high, mismachining tolerance is few, machining accuracy advantages of higher.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the sectional view in A-A direction in Fig. 1 of the present invention.
Fig. 3 is the structural representation of first piston advanced state in Fig. 2 of the present invention.
Fig. 4 is the structural representation of the second piston advanced state in Fig. 2 of the present invention.
Detailed description of the invention
Automatic rotary calibration processing unit (plant) as shown in Figure 1, comprises chuck 1, claw, and claw is made up of upper clipping claw 12 and lower claw 13, is clipped on lathe outside chuck 1, upper clipping claw 12 is movably arranged in the axis hole of clamping piston 6 by installation shaft, make can relatively rotate between upper clipping claw 12 and clamping piston 6, clamping piston 6 is arranged in the clamping cylinder 14 on chuck 1, make upper clipping claw 12 and lower gripper 13 clamping work pieces by hydraulic drive clamping piston 6, upper clipping claw 12 and lower gripper 13 can be selected to change corresponding shape according to the shape of workpiece, lower gripper 13 is connected with the shaft hole matching on rolling disc 9 by installation shaft, rolling disc 9 is axially arranged on chuck 1 by locating piece 7, rolling disc 9 is radial to be coordinated with chuck 1 installing hole inwall is dynamic, rolling disc 9 radial direction in chuck 1 installing hole can be rotated, and be axially fixed, polygon cylinder is made at rolling disc 9 external cylindrical surface middle section position, polygon cylinder can according to rolling disc 9 anglec of rotation need be designed to quadrangle cylinder or hexagon cylinder, the chuck 1 of polygon cylinder side is provided with the first oil cylinder 16 and the second oil cylinder 15, the second piston 4 end in first piston 3 end in first oil cylinder 16 and the second oil cylinder 15 extend in a plane of polygon cylinder respectively, first piston 3 and the second piston 4 adopt hydraulic pressure interaction to control, namely while hydraulic system promotion first piston 3 pushes away forward, second piston 4 is drawn back, and the second piston 4 is when pushing away forward, first piston 3 is drawn back, first piston 3 and the second piston 4 are remained, and one contacts with a face of polygon cylinder, realize to the rotation of rolling disc 9 with from lock control.
The side of first piston 3 and the second piston 4 end is shaped with the inclined-plane cooperatively interacted with the plane of polygon cylinder respectively, the opposite side of first piston 3 end is shaped with the inclined-plane parallel with the second piston 4 end chamfer, make to keep good mutual movement between first piston 3 and the second piston 4, and keep good plane contact between first piston 3, second piston 4 and rolling disc 9.
Between rolling disc 9 radial direction and chuck 1 installing hole inwall, journal bearing 8 is housed, between rolling disc 9 end face and chuck 1 installing hole bottom surface, plane bearing 10 is housed, reduce the rotating friction force between rolling disc 9 and chuck 1; Installation end spherical bearing between the installation shaft end face of upper gripper 12 and the axis hole bottom surface of clamping piston 6, the rotating friction force in reduction between gripper 12 and clamping piston 6.Sealed by piston end cap 5 between clamping cylinder 14 and chuck 1, sealed by first piston lid 2 and the second piston cap 17 respectively between the first oil cylinder 16, second oil cylinder 15 and chuck 1, the end face of rolling disc 9 is axially installed on chuck 1 by bottom 11.Chuck 1, claw, rolling disc 9, clamping piston 6, first piston 3, second piston 4 all adopt steel alloy through Overheating Treatment, improve product mechanical performance and extend product service life.