36results about How to "Avoid repeated positioning errors" patented technology

The present invention discloses a device for measuring thermal errors at a working state of a gear grinding machine. The device comprises a temperature measuring part and a displacement measuring part, the temperature measuring part comprises a temperature sensor arranged on the main heating part of the gear grinding machine, the displacement measuring part comprises an X-direction displacement sensor and a Y-direction displacement sensor which are fixed on a main shaft base of the gear grinding machine through a support, the X-direction displacement sensor and the Y-direction displacement sensor contact with a detection rod, and the detection rod is fixed on a rotary table. Also disclosed is a method for measuring thermal errors by using the device. The method comprises displacement measurement, detection rod circle centre coordinate sequence calculation, system error removal, rotary table axis expression calculation and thermal error modeling. According to the device, the X-direction displacement sensor and the Y-direction displacement sensor are arranged on the gear grinding machine, and temperature sensors are arranged on main heating parts of the gear grinding machine; and by using the device for thermal error measurement, the measuring precision is high and a compensation result is excellent. The device is simple in structure, and the measuring method is easy to learn and easy to popularize.

The invention provides a special tool for processing the end surface of a bearing cover. The special tool comprises a die holder, wherein the upper end surface of the die holder is connected with a rotating module, and the periphery of the bottom end of a pin shaft positioned in the rotating module is orderly sleeved with a plane bearing and a belleville spring; the bottom end of the pin shaft penetrates through the die holder to be connected with a locknut; the rotating module rotates round the pin shaft on the die holder and is positioned with the die holder through a positioning bolt; the upper end of the rotating module is connected with a central stud, the central stud is movably sleeved with a backing plate and a pressing plate, and a flanged nut is arranged at the top end of the central stud; a positioning column used for positioning the outer wall of the rotating module is clamped on the die holder positioned outside the rotating module. The special tool adopts the 180 degrees of rotation of the rotating module to meet the processing of the two parallel surfaces of the bearing cover, therefore realizing the purpose that one-time clamping meets the processing of two working procedures, greatly improving the processing efficiency and precision, and avoiding a repetitive position error.

The invention discloses an electrophoresis auxiliary micro-ultrasonic machining tool and a method for implementing electrophoresis auxiliary micro-ultrasonic machining by the utilization of the machine tool. The machining tool comprises a spindle system, an electricity feeding system, a spindle micro-ultrasonic longitudinal vibration system and a multi-functional cup-shaped working solution groove. A novel combined machining technology is provided, absorption of electrophoreses is added to the micro-ultrasonic machining, so that micro abrasive grains in ultrasonic machining working solution are driven by electric field force to move to neighborhood of a machining area, and existence of the abrasive grains in the machining area is guaranteed. The utilization ratio of the abrasive grains can be effectively improved, so that the efficiency of the micro-ultrasonic machining is improved.

The invention discloses a special machine tool for boring rear axle housings, which includes a bed and a fixture. The fixture includes an intermediate positioning mechanism for positioning the pipa holes of the rear axle housing arranged in the middle of the upper surface of the bed, and symmetrically arranged on the intermediate positioning mechanism. The centering clamping mechanism on both sides, the middle positioning mechanism includes the clamping body and the floating plate arranged on the clamping body, and the centering tensioning mechanism is arranged in the floating plate; the invention uses the V-shaped block of the centering clamping mechanism to carry out rear axle The two ends of the shell are clamped to perform axial positioning and eliminate the positioning error caused by the machining error of the outer circle of the shaft at both ends; The end face of the pipa hole is supported, and the support nails float with the floating plate to eliminate the processing error of the end face of the pipa hole; the rear axle housing is accurately positioned and clamped to ensure that the bearing hole of the boring bridge tube is concentric with the outer circle.

The invention discloses flexible machining equipment of multi-main shaft and multi-station connecting rods. A bed body of an X axle is arranged on one side of a Y-axle stand column and a bed body (2); a main shaft box body (7) of the X axle is mounted on the bed body of the X axle; a balance device (3) is mounted on the Y-axle stand column and the bed body, and is connected with a Y-axle ram (4); the Y-axle ram is mounted on the Y-axle stand column and the bed body through a Y-axle feed driving system; a revolving worktable (6) with hydraulic fixtures is mounted on the Y-axle ram through an A-axle revolving head (5); multiple positioning and mounting holes of machined workpieces are formed in the revolving worktable with the hydraulic fixtures; multiple main shaft-cutter systems (8) are arranged in the main shaft box body of the X axle; four sets of fixtures are mounted on the revolving worktable with the hydraulic fixtures, and are corresponding to the main shaft-cutter systems on the main shaft box body of the X axle in number; and each set of fixtures can synchronously clamp multiple parts to synchronously participate in cutting. The flexible machining equipment is compact in structure, realizes high automation, and can reduce the labor cost.