21 results about "Position tolerance" patented technology

The embodiment of the invention discloses a multi-sensor monitoring and compensating method for machining deformation of a large annular part. According to the embodiment of the invention, the feed-forward compensation amount can be generated on the basis of the predicted radial deformation amount of the stress abrupt change area in the surface radial deformation appearing time when the large annular part is machined, and then the feedback compensation amount is generated according to the deviation between the expected machining contour and the actual radial position data of the large annular part; and generating a total compensation amount according to the feedback compensation amount and the feed-forward compensation amount, and adjusting the motion trail of a cutter on the machine tool according to the total compensation amount, and the expected machining contour, the shape tolerance and the position tolerance of the large annular piece. Therefore, according to the embodiment of the invention, deformation caused by stress release can be compensated in real time in the machining process of the large annular part, and the compensation efficiency is improved.

This invention discloses a method for correcting the form and position tolerances of a fiber-wound engine housing. A front joint positioning fixture is connected to the front joint of the housing, and a rear joint positioning fixture is connected to the rear joint of the housing. The method involves detecting the coaxiality, perpendicularity, and spacing of the front joints, and marking the high and low points where perpendicularity exceeds the tolerance. Using the high point of the rear joint as a reference, the method adjusts the low point by tightening the adjusting screws near the low point of the rear joint and the rear joint positioning fixture, pulling the low point outwards to the high point. The correction fixture fully utilizes the tensile and non-compressive characteristics of the front and rear joints to adjust the low point of the out-of-tolerance joint to the reverse limit. The adjusted housing is then subjected to low-temperature heating, which causes the epoxy resin in the composite layer to undergo permanent deformation, thereby stabilizing the housing dimensions. The perpendicularity tolerances of the front and rear joints meet the design and process requirements, achieving the correction purpose and avoiding product scrap due to excessive perpendicularity of the housing.

The application discloses a kind of in-situ measurement methods of large-size annular part shape and position tolerance, belong to detection technical field, for large-size annular optical, in-situ measurement of mechanical parts, its steps are: (1) using scale, laser interferometer, standard ball calibration numerical control machining center precision;(2) using indicating meter measurement and debugging workpiece and turntable parallel, concentric;(3) using laser tracker measurement workpiece parameter establishes workpiece coordinate system;(4) using laser tracker combines machine tool to measure part profile parameters;(5) analysis part geometric quantity shape and position error.The application method solves the in-situ measurement problem of large-size annular workpiece machining process, reduces the risk and cost that workpiece needs to be repeatedly transported and inspected, with the characteristics of convenient operation, safe and efficient, high measurement precision.

The embodiment of the application discloses a large ring part processing deformation multi-sensor monitoring compensation method; the embodiment of the application can generate a feedforward compensation amount based on the radial deformation amount of the stress mutation region in the surface radial deformation appearance time obtained by prediction when processing a large ring part, then generate a feedback compensation amount according to the deviation between the expected processing contour of the large ring part and the actual radial position data, generate a total compensation amount according to the feedback compensation amount and the feedforward compensation amount, and adjust the motion trail of the cutter on the processing machine tool according to the total compensation amount, the expected processing contour of the large ring part, the shape tolerance and the position tolerance. Thus, the embodiment of the application can compensate the deformation caused by stress release in real time during the processing of the large ring part, and improve the compensation efficiency.

According to the special detection tool for the profile tolerance and the position tolerance of the automobile auxiliary frame rear support aluminum workpiece, a plurality of tools are arranged on a base, quick clamps are arranged above the two ends of each tool respectively, T-shaped pressing heads are installed on the quick clamps, and the T-shaped pressing heads are pressed on the corners of the workpiece; side push rod seats are arranged on the two sides of the tool respectively, side push rods are inserted into horizontal through holes in the side push rod seats, and side contour blocks are installed at the ends of the side push rods. Through holes are formed in the positions, corresponding to connecting holes of connecting lugs on the two sides of the workpiece, of the base, and the connecting holes and the through hole inserting hole gauges are formed. The auxiliary frame rear support outer contour detection tool is specially used for detecting the auxiliary frame rear support outer contour and the processing hole site, and has the advantages of rapid and accurate detection, convenient operation and the like.

The utility model discloses a form and location tolerance detection device, which belongs to the technical field of form and location tolerance detection and comprises a main guide rail, two ends of the main guide rail are respectively provided with a plurality of split guide rails, the bottoms of the main guide rail and the split guide rails are respectively provided with a lower sliding groove, and an inner cavity of each lower sliding groove is provided with a supporting mechanism. The top of the main guide rail and the top of the split guide rail are each provided with an upper sliding groove, and a detection mechanism is arranged in an inner cavity of each upper sliding groove. In the utility model, other split guide rails are inserted into the end parts of the main guide rails or the split guide rails, so that the connecting blocks at the end parts of the other split guide rails are inserted into the through grooves at the end parts of the main guide rails or the split guide rails; and in addition, the elastic force of a first spring is utilized to drive a bolt to be inserted into an insertion hole in a connecting block to fix the main guide rail and the split guide rails and fix the split guide rails, so that the length of the detection device is conveniently adjusted, and the practicability of the form and location tolerance detection device is improved.

The embodiment of the application discloses a kind of shape and position tolerance detection frock and detection method, wherein the frock includes: frock base, the frock base is used to support;Main rod, the main rod is vertically connected with the base;Auxiliary rod, the auxiliary rod is vertically connected with the main rod, the relative position of the auxiliary rod with the main rod is adjustable;Dial gauge, the dial gauge is connected to the end of the auxiliary rod by clamp table piece;The clamp table piece is used to adjust the position of dial gauge.Improve detection efficiency, reduce measurement cost.

The present application relates to the technical field of slow wire mechanical processing, and provides a composite pipe shell high-precision shape and position tolerance processing technology, which comprises the following steps: processing a pre-hole in the composite pipe shell to release stress; measuring the coaxial degree shape and position tolerance of the composite pipe shell after pre-processing; hydrogen burning straightening of the composite pipe shell to eliminate stress; measuring the shape and position tolerance of the composite pipe shell after straightening, and recording the position change of the high and low point positions of the coaxial degree measurement on the pole shoe; and adjusting the center position of the composite pipe shell processing according to the recorded high and low point positions of the coaxial degree. Through the process mode of increasing the pre-processing inner diameter, measuring the shape and position tolerance, hydrogen burning straightening of the composite pipe shell, measuring the shape and position tolerance after straightening, and adjusting the processing center position during the composite pipe shell machining process, the composite pipe shell reaches high-precision shape and position tolerance precision, and the coaxial degree reaches Φ0.01mm.

The application relates to the field of machining of long-shaft parts in certain helicopters, in particular to a machining method for guaranteeing shape and position tolerances of key assembly holes of long-shaft parts. According to the machining method, after the part is clamped, the outer cylinder inclination error is measured on the machine tool, the measuring points should be close to the two ends of the outer cylinder, according to the measured value, the coordinate system is compensated after formula calculation, then the hole is bored to the final size, and the symmetry requirement is guaranteed. The symmetry requirement of the two groups of key assembly holes and the outer circle reference of the part can be effectively controlled, and the qualified rate of the part is improved. Meanwhile, the method can also be used for compensation machining calculation of related shape and position tolerances of shaft parts with similar structures.

This utility model relates to a pump body form and position tolerance inspection fixture, including a positioning mechanism connected to the pump body, a guide shaft coaxially rotatably connected to the pump body through the positioning mechanism, and a detection mechanism connected to the guide shaft. The positioning mechanism includes a positioning plate connected to the guide shaft and used for connecting the guide shaft to the pump body, and a mounting seat sleeved on the guide shaft to limit the axial displacement of the guide shaft. By setting the positioning mechanism, the guide shaft can be connected to the pump body, and the rotation of the guide shaft can be limited laterally and axially to improve the stability of the guide shaft rotation and improve the accuracy of detecting the form and position tolerance of the pump body. The positioning plate has multiple installation steps, so that the fixture can be adapted to different pump body inlet ring diameters. At the same time, the convenient adjustment between the two sets of positioning plates can shorten the installation time of the inspection and improve the inspection efficiency.

The invention relates to a steel member form and location tolerance detection device based on BIM model guidance. The steel member form and location tolerance detection device comprises an upper computer, a laser range finder, an angle sensor, a three-axis attitude adjusting rotary table, a three-axis attitude adjusting sliding table support, a high-power laser, an ultrasonic thickness gauge and a laser target ruler. The three-axis attitude adjusting rotary table is installed on the three-axis attitude adjusting sliding table support, and the laser range finder is installed on the three-axis attitude adjusting rotary table. The ultrasonic thickness gauge is located on one side of the steel member, the laser target ruler is fixed to the steel member, and a laser point of the laser range finder irradiates the position, with the scale being x, of the laser target ruler. Compared with the prior art, the position and angle of the laser range finder are adjusted by adopting the three-axis attitude adjusting rotary table and the three-axis attitude adjusting sliding table bracket, so that actual measurement data can accurately correspond to design data in a steel member BIM model one by one; the method has the advantages that actual steel components are measured, whether the sizes of the steel components are qualified or not can be known, and the acceptance efficiency and reliability are greatly improved.

This invention discloses a method for predicting the motion straightness of an L-shaped worktable on a mortise and tenon broaching machine. The method includes: acquiring the motion pose error of the top surface of the slider, the form and position tolerances of the assembly surface, and the structural dimensions of the worktable; calculating the pose error of the tool holder mounting surface considering the superposition of worktable form and position errors based on the aforementioned motion pose error, assembly surface form and position tolerances, and worktable structural dimensions; and calculating the motion straightness of the tool holder mounting surface of the L-shaped worktable based on the pose error of the tool holder mounting surface considering the superposition of worktable form and position errors. Based on the deformation coordination principle and the small displacement screw theory, and utilizing error propagation modeling techniques, factors such as guide rail straightness and parallelism errors, and worktable form and position errors are mapped into the motion straightness prediction model of the L-shaped worktable on the mortise and tenon broaching machine. This effectively solves the problem of accurately predicting the motion straightness of a worktable supported by multiple non-coplanar guide rails.

The utility model discloses a detection device, which comprises a positioning mechanism, a positioning column and a detection mechanism, and is characterized in that the positioning mechanism comprises a positioning plate, and the positioning plate is provided with a positioning hole; at least part of the positioning column is arranged in the positioning hole, the positioning column and the inner wall of the positioning hole are arranged at an interval to form a positioning gap, and the tested component is arranged in the positioning gap and can be in contact with any one of the inner wall of the positioning hole and the peripheral wall of the positioning column. At the moment, whether the detected part is in contact with the other one of the inner wall of the positioning hole and the outer peripheral wall of the positioning column is detected through the detection mechanism, whether the form and location tolerance such as the coaxiality of the detected part is qualified or not can be rapidly judged, and the detection efficiency of the form and location tolerance of the detected part is effectively improved.

The invention discloses a high-precision hollow shaft grinding machining method with multiple form and location tolerance elements, which is suitable for machining hollow shaft parts with the length less than 150mm on a high-precision internal and external grinding machine, and comprises the following steps: remaining allowance by turning, grinding after clamping of a three-jaw chuck, grinding after clamping of a first grinding mandrel and grinding after clamping of a second grinding mandrel. By means of the machining method, the high-precision form and location tolerance requirements of coaxiality, perpendicularity, total run-out and the like of the hollow shaft are met. Due to the fact that the form and location tolerance elements of the hollow shaft are many, the precision requirement is high, and all the elements cannot be machined in place through one-time clamping, the size is guaranteed through the reasonable technological process that the three-jaw chuck, the first grinding mandrel and the second grinding mandrel are combined and matched, and finally the clamping precision and stability of the hollow shaft are effectively controlled.

The invention provides a spacecraft labeling system and method for a digital three-dimensional factory, belongs to the field of computer aided design and manufacturing, and aims to solve the problems that an existing three-dimensional labeling system is poor in model readability and prone to ambiguity due to the lack of auxiliary geometric elements such as a center line and the like. The system comprises a labeling environment management module, a size labeling module, a surface roughness labeling module, a form and location tolerance labeling module, a technical requirement writing module and a rapid line repairing module. Correspondingly, the method comprises the steps of setting a labeling environment, executing various labels, supplementing missing center lines or size lines in the model and the like. The method is characterized in that missing key auxiliary elements in the three-dimensional view are supplemented through the rapid line supplementing module, the problem that an existing scheme is not clear in expression is solved, the definition of a three-dimensional model is comparable with that of a traditional two-dimensional drawing, data homology of the whole process is achieved, and the development efficiency is improved.

[Problem] To provide a motor that comprises a bus bar unit and that is capable of relaxing dimensional tolerance and positional tolerance. [Solution] A motor 4 comprises: a stator 21 comprising a core 22 and an insulator 27 which is provided to the core 22 and around which magnet wires 23 are wound; and a bus bar unit 26 formed by molding, with a resin, a bus bar which electrically connects the magnet wires 23 coming out of slots of the stator 21 and a three-phase terminal 33. The motor comprises: a keyway 31 which is formed on the outer periphery of the insulator 27; and a leg part 43 which is formed on the bus bar unit 26 and extends into the keyway 31. The width of a claw section 47 of the leg part 43 is smaller than the width of the keyway 31.

The utility model belongs to the field of micromotor manufacturing, and discloses an auxiliary device for measuring form and location tolerance of a limited angle torque motor rotating shaft, which adopts an L-shaped right-angle structure base, a horizontal fixed surface is provided with a positioning shaft capable of axially displacing, one end of the positioning shaft is provided with an arc-shaped groove, and the arc-shaped groove is matched with a vertical positioning surface to clamp a flat shaft part of the rotating shaft. The positioning shaft is sleeved with the spring and abuts against the tail end of the horizontal fixing face, the spring is contracted by pulling one end of the positioning shaft, and after release, the spring drives the positioning shaft to reset to complete clamping. The vertical positioning surface of the L-shaped base is used for providing a quantitative reference, the arc-shaped groove is attached to the arc-shaped surface of the flat shaft, the flat surface of the flat shaft is attached to the vertical positioning surface, and the posture of the flat shaft is accurately positioned. By adopting the device, the problem of large deviation caused by lack of quantitative reference in manual adjustment can be solved, the flat shaft is accurately and vertically placed, the technical bottleneck of poor measurement result precision in the prior art is effectively solved, and the measurement precision is improved.

The invention discloses a non-parallel workpiece form and location tolerance detector and a detection method thereof. The detector comprises a programmable micro numerical control system, a reference plane precision regulation and control module, a three-dimensional rack multi-axis linkage module, a stepping motor driver module, an output type digital display dial indicator module and a data processing and interaction module. The programmable micro numerical control system is in signal connection with each module and is used for commanding linkage; the reference plane precision regulation and control module is adjusted to a preset angle through closed-loop control to bear and fix a workpiece; the three-dimensional rack multi-axis linkage module comprises a three-axis linkage structure and drives a dial indicator module at the lower end of a Z axis to scan the surface of a workpiece and collect data; the stepping motor driver module drives each stepping motor to operate; collected data is transmitted to the data processing and interaction module for analysis. According to the invention, high-precision automatic detection of the form and location tolerance of the non-parallel workpiece can be realized, the measurement stability and precision are high, manual errors can be eliminated, the efficiency is improved, the cost is reduced, and the method is suitable for quality control in the manufacturing industry.

The utility model relates to the technical field of brake drum detection, and discloses a brake drum inner hole form and location tolerance detection device which comprises a detection table, a detection mechanism is arranged on the upper surface of the detection table, a positioning mechanism is arranged on the upper surface of the detection table and located on the outer side of the detection mechanism, and the positioning mechanism comprises a C-shaped plate. An adjusting rod is rotatably connected to the upper surface of the C-shaped plate in a penetrating mode, a gear is fixedly connected to the lower end of the adjusting rod, a ratchet wheel is fixedly connected to the position, located above the C-shaped plate, of the outer portion of the adjusting rod in a sleeving mode, a locking mechanism is arranged on the position, located on the rear side of the adjusting rod, of the upper surface of the C-shaped plate, and racks are slidably connected to the surfaces of the left side and the right side of the interior of the C-shaped plate. One end of the rack is fixedly connected with a positioning plate; the ratchet wheel and the pawl in the positioning mechanism are locked in a matched mode, it is guaranteed that clamping is stable and not loose, the positioning plate and the positioning blocks on the elastic plate are driven by transmission of the gear and the rack to clamp the brake drum in a self-adaptive mode, and the fixing requirements of brake drums of different specifications can be met.

A device for robot-assisted machining of surfaces is described below. According to an example, the device has a retainer with a base plate designed for mounting on a manipulator and has an assembly suspended on the retainer, the assembly comprising a machine tool. The retainer has a tilt mechanism which couples the assembly to the retainer in such a way that the assembly can be tilted relative to the base plate about two axes of rotation, wherein the two axes of rotation can intersect with one another and run through the assembly below the base plate.