Xi'an University of Technology

Yumei Huang

Xingang Yang

Yao Dong Liu

Yong Yang

Hongyan Liu

Ye Hui

Weigang Lv

Tongqing Liu

Guangpeng Zhang

Feng Gao

Li Zhang

Rui Zhao

Longfei Zhang

Manzhi Yang

Wenfeng Hou

Wen Yan

Chuang Gao

Hao Jiang

A serially-connected ball screw pair and piezoelectric actuator macro-micro driving and guiding device includes, from the bottom to the top, a sliding seat (), a ball screw pair, a sliding table guide rail pairs, a nut seat (), a piezoelectric actuator (), a micro-moving table, a nut seat guide rail pairs and a sliding table (). The axis of a ball screw is symmetric with respect to two sliding table rail pairs, a nut () of the ball screw pair is fixedly mounted into the nut seat (), one end of the piezoelectric actuator () is fixedly connected with the nut seat () and the other end thereof is fixedly connected with the micro-moving table (), the axis of the piezoelectric actuator is symmetric relative to two sliding table rail pairs, an upper surface of the micro-moving table is fixedly mounted to a lower surface of the sliding table, and two nut rail pairs are symmetric relative to the axis of the ball screw. The ultra precision feeding in a long stroke within a full journey can be achieved; and the piezoelectric actuator only endures the driving force without enduring the driving torque generated by the driving force of the ball screw pair, thus, so that the piezoelectric actuator is in a good stressed status, which is applicable to a large-load ultra-precision feed system.

Serially-connected ball screw pair and piezoelectric actuator macro-micro driving and guiding device

A device and a method for testing the rigidity and non-linear relationship of the coupling interface for cylindrical fitting including an axial loading assembly which is provided along a horizontal central line within a side wall of a frame test bench and contacting with the test-piece shaft via a steel ball, a radial loading assembly downward provided along a vertical central line of top board of the frame test bench, a tip of a perpendicular loading part of the radial loading assembly extending into the outer housing of the test-piece housing fixed on an upper plane of a bottom wall of the frame test bench, with the test-piece shaft and the test-piece housing fitted and connected to each other via a coupling interface for cylindrical fitting; a plurality of displacement sensors fixed on the test-piece housing, and test heads of respective displacement sensor assembly aiming at the test-piece shaft.

Device and method for testing rigidity and non-linear relationship of coupling interface for cylindrical fitting

The present invention discloses a device for detecting axis coplanarity of orthogonal rotary shafts having a built-in intersection, wherein a front assembly rotary body is coaxially connected on a front assembly housing, the front assembly rotary body and a rear assembly housing are fixedly connected with each other, the rear assembly rotary body is mounted in the rear assembly housing, a first three dimension movement fine tuning mechanism is mounted at an end of the rear assembly rotary body, the first three dimension movement fine tuning mechanism is connected with a standard sphere through a connecting rod, the three dimension movement fine tuning mechanisms are provided in the horizontal direction of the standard sphere and below the standard sphere in vertical direction, and two non-contact displacement sensors are mounted on said two three dimension movement fine tuning mechanisms respectively. The present invention also discloses a precision measurement method for measuring axis coplanarity of the orthogonal rotary shafts having a built-in intersection by using the above device, having a feature of high measurement precision, which is adaptive to coplanarity detections for the cantilever-type orthogonal shafts having a built-in intersection and the clamp-type orthogonal shafts having a built-in intersection.

Device for detecting axis coplanarity of orthogonal rotary shafts having built-in intersection and precision detecting method

A guide rail precision rotation apparatus is provided with a housing of torque motor and a bearing housing fixedly arranged on an upper surface of a base, and a bearing sleeved on an inner edge step at the upper end of bearing housing. The inner ring of bearing is sleevingly connected to an intermediate rotating body, the lower end of the body is connected to a bearing inner ring cap; a round grating is provided at an outer edge of lower end of the cap, a connecting piece is arranged on the motor, the lower end of connecting piece is fixedly connected to a rotary shaft of the motor, the connecting piece and the body are both connected to the lower end of a fine movement mechanism, and the upper end face of fine movement mechanism is fixedly connected to a rotary worktable.

Macro-micro actuated distended guide rail precision rotation apparatus

A biaxial linear-motion micro drive apparatus includes: a mounting base A on an upper surface of a Z-direction sliding base; a Z-direction micro actuator fixed within the mounting base A and connected with a Z-direction micro-motion platform connected with an X-direction sliding base; Z-direction guide rail strips arranged on the Z-direction sliding; two Z-direction guide rail blocks provided on one Z-direction guide rail strip fixedly mounted on a lower surface of the X-direction sliding base; a mounting base B provided on an upper surface of the X-direction sliding base; an X-direction micro actuator in the mounting base B and connected with an X-direction micro-motion platform connected with an XZ biaxial motion platform; two X-direction guide rail strips arranged on the upper surface of the X-direction sliding base; two X-direction guide rail blocks provided on each X-direction guide rail strip mounted on a lower surface of the XZ biaxial motion platform.

Biaxial linear-motion micro drive apparatus

A computer numerical control machine tool for grinding two sides of a plane by shifting self-rotation ultrasonic vibration, wherein a pillar () is provided on the tool body () of the machine tool, a Y axis movement assembly () is provided on the platform of the tool body (), with a lower revolving movement assembly (), which revolves about a Z coordinate axis, being mounted on the upper surface of the Y axis movement assembly (), and a lower grinding plate () being mounted coaxially above the lower revolving movement assembly (); an ultrasonic vibration assembly () is mounted fixedly on the pillar (), with a separation plate () for clamping a workpiece assembly () being provided on the ultrasonic vibration assembly (); an X axis movement assembly () is mounted on the upper part of the pillar (), a Z axis movement assembly () is mounted on the upright face of the X axis movement assembly (), with an upper revolving movement assembly (), which revolves about the Z coordinate axis, being provided on the Z axis movement assembly (), and an upper grinding plate () being mounted coaxially on the revolving axis of the upper revolving movement assembly (). The present invention enhances the time variation of grinding movement tracks, the uniformity of grinding speed distribution, machining efficiency and machining precision.

Computer numerical control machine tool for grinding two sides of a plane by shifting self-rotation and ultrasonic vibration

Disclosed is an operating position changeable loading apparatus with multi-axis joint movement used on machining center. The apparatus consists of a load-receiving test piece and a load-exerting component. Moving the load-exerting component and the load-receiving test piece to a preset loading position according to a multi-axis joint movement, with the displacement value measured by displacement sensors and the amount of simulated load measured by a force sensor of the loaded-exerting component, a stiffness of the load-exertion position under a simulated load can be derived. Changing the load-exertion position, repeating in sequence the previous steps, a stiffness distribution under the simulated load can be derived.

Multi-axle joint shifting loading apparatus for processing center and detection method for static stiffness distribution

A translocation-simulating loading apparatus for the gear grinding machine with the shaped grinding wheel is provided. The apparatus includes a load-receiving test piece disposed on the gear grinding machine with the shaped grinding wheel and a load-exerting component for use in loading simulation. The gear grinding machine enables linear movements along the X, Y, and Z axes, a rotary movement around the Y axis, a rotary movement C around the Z axis, and a rotary movement A around the X axis. An angle &#x3b1; is formed between the axis L of a ball seat of the load-exerting component and the X axis direction of a Y axis component and an angle formed between the normal line of a load receiving face a and the X direction of the coordinate system of the machine tool is &#x3b1;. A detection method for static stiffness distribution is provided.

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Xi'an, China

Yumei Huang