1022results about How to "Improve grinding accuracy" patented technology

The invention discloses a free-form surface robot polishing system. The system comprises a workbench, an industrial robot, a robot control cabinet, a polishing tool, a pneumatic main shaft, a connecting part, a pneumatic control cabinet and a system control cabinet. The system is high in automation degree, high in flexibility and particularly suitable for polishing a free-form surface. Specifically, the pneumatic main shaft fixed at the tail end of the industrial robot is used for clamping the polishing tool, the machined surface is tightly pressed by the polishing tool all the time by means of the pneumatic compliant force control function of the pneumatic main shaft, constant pressure is kept, the pose of the industrial robot is adjusted according to a planned route, the polishing pressure is in the normal direction of the machined surface, the polishing tool rotates at high speed through a pneumatic motor of the pneumatic main shaft, and then the industrial robot drives the polishing tool to polish a part according to the planned route.

The invention relates to a machine learning-based robot grinding method, which belongs to the field of abrasive machining. The method comprises the following steps of: in each working stage of an abrasive belt, grinding workpieces made of different materials to obtain the contact force between the workpieces and a grinding wheel, the curvature and the grinding quantity of grinding surfaces of the workpieces, and the processing speed; modeling a dynamic model and initializing a self-adapting dynamic model set of a robot by using initial data and adopting a machine learning method; and according to an original dynamic model and measured data of the current working condition during grinding, establishing a self-adapting dynamic model of the current robot, and adding the self-adapting dynamic model to the self-adapting dynamic model set M of the robot. The machine learning-based robot grinding method can realize high-precision grinding, reduce the production cost and improve the processing efficiency.

The invention is applicable to the technical field of robot polishing, and provides a robot polishing control system. The system comprises a linear laser sensor, a three-dimensional model constructionmodule, a to-be-polished area generation module, a trajectory generation module, a simulation module and a trajectory optimization module; the linear laser sensor scans a to-be-polished workpiece andobtains structural parameters of the to-be-polished workpiece; the three-dimensional model construction module constructs a three-dimensional model of the to-be-polished workpiece; the polishing areageneration module obtains a three-dimensional model of a to-be-polished area on the basis of a CAD model; the trajectory generation module generates a polishing trajectory of the to-be-polished areaand polishing force of corresponding trajectory points; a three-dimensional robot conducts polishing simulation on the basis of the generated polishing trajectory and the generated polishing force ofthe corresponding trajectory points; the trajectory optimization module optimizes the generated polishing trajectory and the generated polishing force of the corresponding trajectory points, and a robot controller controls the robot to conduct polishing on the basis of the optimized polishing trajectory and the optimized polishing force of the corresponding trajectory points. The polishing trajectory is automatically planned based on the automatically-obtained model of the to-be-polished area, the end position of the robot is corrected based on force control in the process of planning the polishing trajectory, the polishing precision can be improved, and the system can be suitable for polishing of complex workpieces.

The invention discloses a two-wheeled numerical control roll grinder and a numerical control method thereof. A small sliding frame of the double-wheeled numerical control roll grinder is provided with a U-axis micro-feeding mechanism, a main mechanical transmission case is lubricated by adopting an active lubricating loop, a cooling water purifying device is arranged on a grinder body, a large sliding frame guide rail is connected with a Z-axis guide rail hydraulic station through a lubricating oil tube, the Z-axis guide rail hydraulic station is subjected to dynamic pressure lubrication, a grinding wheel and an abrasive belt wheel are respectively connected with a shared mainshaft hydraulic station, a hybrid bearing and a capillary tube adjuster are respectively arranged at the front and the back of a main shaft of the grinding wheel and a main shaft of the abrasive belt wheel, and the mainshaft of the grinding wheel and the mainshaft of the abrasive belt wheel are subjected to dynamic and static pressure lubrication. According to the invention, due to adoption of a numerical-control setting manner, a roll curve is easy to change, ground workpieces are higher in quality and are easy to automatically control, the manual misoperation probability is lowered, a very excellent repeatable machining purpose is achieved and the quality of batch production can be ensured.

The invention relates to the field of polishing machinery, in particular to an image-processing-based robot polishing production method and a production system applying the same. The production method comprises the following steps that (1) a workpiece image is obtained; (2) the workpiece image is processed and recognized; (3) a trail file is generated; and (4) automatic polishing is achieved through the trail file. According to the production system, a software trigger method is used for controlling an industrial camera to take a picture for the surface of a workpiece needing polishing, the camera saves the shot picture into a computer, a computer program reads and processes the image and recognizes a polishing area, according to the recognized polishing area, three-dimensional trail path coordinates and the trail file are planned, and a robot automatically polishes the surface of the workpiece. According to the production method, the computer is used for recognizing the polishing area and calculating the polishing trail coordinates, thus the polishing efficiency and polishing precision can be greatly improved, manpower resources are saved effectively, constraint of production time is broken, and production speed is increased effectively.

A five-axis multi-functional thread grinding machining center belongs to the numerically controlled machine tool field. The five-axis multi-functional thread grinding machining center consists of a machine tool body, a Z-direction slide plate, a workpiece electric spindle, a X-direction base plate, a post, a Y-direction slide plate, an A-axis turntable and a grinding electric spindle. A Z-direction servomotor drives a Z-direction lead screw to drive the Z- direction slide plate to perform Z-direction movement, the post is arranged on a X- direction guide rail slider, a X-direction servomotor drives an X-direction lead screw to drive the post to perform X-direction movement, a Y-direction guide rail is fixedly arranged on the post, the Y-direction slide plate is positioned on a Y-direction guide rail slider, a Y-direction servomotor drives a Y-direction lead screw to drive the Y-direction slide plate to perform Y-direction movement, the Z-direction slide plate is provided with the workpiece electric spindle, the A-axis turntable is arranged on the Y-direction slide plate and is connected with an A-axis servomotor, and the grinding electric spindle is fixed on the A-axis turntable by bolt fastening. The five-axis structure is adopted in the grinding machining center, thus simplifying machine tool structure, realizing grinding of super-long nuts, enlarging applicability of the machine tool and lowering manufacturing cost.

The invention relates to a numerical control curve-tooth bevel gear grinder, which comprises a lathe bed, and is characterized by also comprising an upright post, a grinding wheel main shaft box, a workpiece main shaft box, an electric turntable, a grinding wheel correcting mechanism and a numerical control system. The lathe bed in the horizontal direction is provided with linear guide rails vertical to each other, the upright post and a bed saddle are arranged on the linear guide rails respectively, and an upright post automatic moving mechanism is arranged between the bottom of the upright post and the lathe bed; one lateral surface of the upright post is provided with the linear guide rail and the grinding wheel main shaft box, and the same side of the upright posts close to the top is provided with a moving mechanism for driving the grinding wheel main shaft box to move; and the bed saddle is provided with the electric turntable which is provided with the workpiece main shaft box on which the grinding wheel correcting mechanism is arranged. The numerical control curve-tooth bevel gear grinder has the advantages that the grinder simplifies the prior mechanical transmission, shortens adjusting time of a machine tool, has compact and reasonable structure, accurate processing with high accuracy, high automation degree to remarkably improve processing efficiency, and has low manufacturing cost to relieve economic burden of enterprises.

The invention discloses a box shaft hole inner wall grinding device used for speed changing box machining. The device comprises a base. Supporting frames are mounted on the two sides of the upper endof the base correspondingly. A top plate is mounted at the upper ends of the supporting frames. A driving motor is mounted in the middle of the upper end of the top plate. A driving belt pulley is mounted in the middle of the front end of the driving motor and connected with a driven belt pulley through a belt. The rear end of the driven belt pulley is connected with a rotary cam coaxially. The right end of the rotary cam makes contact with a first guide ball. The right end of the first guide ball is connected with a first limit rod. The right end of the first limit rod is connected with a first limit plate. The right end of the first limit plate is connected with a piston rod. The lower end of the rotary cam makes contact with a second guide ball. The lower end of the second guide ball isconnected with a second limit rod. The lower end of the second limit rod is connected with a second limit plate. The lower end of the second limit plate is connected with a lifting rod. According tothe box shaft hole inner wall grinding device, a grinding head can move up and down along the inner wall of a shaft hole during grinding, and in addition, a gas injection cavity can spray out gas which can be used for blowing away disintegrating slag produced during grinding in time.

The invention provides a workpiece automatic machining system and a grinding method of the surface of a workpiece, and belongs to the technical field of machines. The problems that an existing grinding polishing machine is not unified in machining precision and not uniform in workpiece forming are solved. The workpiece automatic machining system comprises a machining center which conducts machining work on the workpiece, and further comprises a grinding unit which is adjacent to the machining center. The grinding unit is provided with a mechanical arm and a plurality of grinding machines, and the mechanical arm can clamp and convey the workpiece which has been machined at the machining center to the grinding machines to be ground. The workpiece automatic machining system and the grinding method of the surface of the workpiece have the advantages of being high in automatic degree, good in uniformity of workpiece forming, high in grinding precision and the like.

The present invention relates to a milling cutter provided with an equidistant arc head on an eccentric shape flank surface and a grinding method, the cutter can reduce the vibration during the process of processing of different hardness of hardened steels for splicing of a mould, the cutter life and workpiece surface quality can be improved, the flank surface shape can be changed, and the cutter tip strength can be improved. The milling cutter is an overall hard alloy end milling cutter. The milling cutter includes a cutter shank (1) and the arc head (2), the arc head includes a large curvature arc (2-1) and a small curvature arc (2-2). Tooth-spacing angles are 87 degrees, 93 degrees, 87 degrees, and 93 degrees, tooth-spacing vertical angles are equal, helix angle (r) is 38 degrees, helix angle (v) is 40 degrees, and cutter end cutting edge flank surface (10) and circumferential cutting edge (6) are in eccentric shape. Front angle is in the range of 0-3 degrees, first clearance angle is in the range of 8-10 degrees, and second clearance angle is in the range of 15-22 degrees. The center position of the cutter is provided with cooling channels (3), the number of the cooling channels is four, and the four cooling channels respectively are located four cutting edge end tooth chip pockets. The present invention also provides a reference for the grinding of the cutter of the type.

A microadvance system for accurate grinding machine is composed of a drive unit consisting of piezoelectric drive power supply, piezoelectric ceramics, man-machine interface type input device, and displacement-voltage table, an executing unit consisting of flexible hinge mechanism and microadvance bench, a detecting unit consisting of inductance-type position sensor or raster rule, detection signal acquiring module, displacement-voltage compensation data table, and signal processing-outputting module, and a control system consisting of microprocessor, D/A and A/D converters, data I/O display, signal amplifier, information integrating interface, and signal processing reference model and algorithm.

The invention discloses an automatic grinding device for an outer profile of a cast iron pan.The automatic grinding device comprises a supporting platform assembly, a moving mechanism arranged on the supporting platform assembly, and a floating grinding head movably arranged on the moving mechanism.The supporting platform assembly comprises a rack.A rotating disk is installed on the rack in a rotating mode.A pot supporting disk is arranged on the rotating disk.The moving mechanism comprises a guide fixing base fixed to the rack and a lead screw installed on the guide fixing base in a rotating mode.The lead screw is movably sleeved with a moving rack.The moving rack is connected with the floating grinding head.A transmission device is arranged at the end of the lead screw.The floating grinding head comprises a first support and a second support which are arranged to form an angle.A rotating shaft is arranged on the first support.A grinding wheel device is arranged on the second support.According to the automatic grinding device for the outer profile of the cast iron pan in the technical scheme, grinding precision and efficiency are improved, and the automatic grinding device is simple in structure, convenient to use and reliable to control.

The invention discloses a self-adaptive control method for large-curved-surface grinding. The method adapts to workpieces with different curvatures through adjusting positions of three support points from the center, shortens the contact force adjusting time through roughly adjusting the thread pre-tightening force to improve the efficiency, acquires the contact force in the grinding process through a stated sampling period to feed back force signals, sets a contact force threshold to calculate a mean value of contact force values acquired by continuous 5 times of sampling periods, and uses a set controller for generating driving signals to continuously adjust the torque direction and magnitude of a drive in a polishing tool module to change the deformation of an elastic part, so that the magnitude of the contact force is proper, a proper numerical value range is kept, and the relatively stable polishing contact force is realized. The method comprises five steps of: (1) grinding preparation; (2) workpiece touching; (3) trajectory planning; and (4) grinding; and the method can realize relatively constant polishing contact force, and improves the machining stability.

The invention discloses a method for manufacturing a ceramic diamond composite grinding wheel, which is characterized by comprising the following steps of: by mass, mixing and pelletizing diamond, silicon carbide and a bonding agent, carrying out compression molding, drying, pre-burning and then sintering to obtain a joint unit; and placing the joint unit and a grinding wheel matrix into a die, pouring a polyimide composite material between the joint unit and the grinding wheel, carrying out pressing, then carrying out cooling and sintering to obtain the grinding wheel. According to the composite grinding wheel manufactured by the method disclosed by the invention, an integrated pressing sintering or embedding splicing mode is adopted; the polyimide composite material is used as a transition adhesive; and the integral grinding wheel is manufactured after carrying out secondary hot pressing and sintering. The chip accommodating and drainage space surface coverage rate of the ceramic diamond composite grinding wheel can reach 30 to 70 percent. The ceramic diamond composite grinding wheel has the following excellent grinding characteristics that the cutting depth is large; the grinding precision is high; in the forming and grinding process, the retentivity of a molded surface is good; the application range is wide; the grinding wheel can be used for dry grinding and has resistance to the high temperature of 350 DEG C and splicing units cannot fall off and blocks cannot fall off; and the grinding wheel has high revolving strength.

The invention relates to the technical field of after-treatment of the welding technology, in particular to a polishing method and system. A triangular sanding belt, a profiling polishing device and a buffing device are driven by a drive device to conduct polishing on a weld joint of a railway vehicle bogie which is located and clamped to a tool jig, and therefore a surface outline needed by design is obtained. According to the prior art, an automatic polishing technology and device are often used for polishing a non-metal structural component, a metal component, especially the railway vehicle bogie, is polished in the mode that workers hold manual polishing tools to complete polishing operation including profiling polishing, and the manual polishing mode has the defects that the work efficiency is low, and the polishing quality and the polishing precision are poor. Compared with the prior art, the polishing method and system improve the polishing quality and the polishing precision of the weld joint of the railway vehicle bogie and meanwhile improve the working efficiency.

A nondestructive grinding method for the hard and crisp crystal substrate of semiconductor or photoelectric crystal features used of a special abrasive disc prepared from the grinding material chosen from CeO2, SiO2 and barium carbonate and the filler containing activator, oxidant and pH regulator, a finishing disc composed of metallic substrate and electroplated diamond particles, and a deionized water as cooling liquid. Its grinding parameters are also disclosed.

The invention discloses an industrial-robot-based abrasive belt grinding device for profiles of a controllable pitch propeller and a manufacturing method of the abrasive belt grinding device and mainly solves the problems caused in numerically-controlled machine tool type manufacturing, such as high cost, instability in machining precision and low efficiency due to manual grinding, occupational hazards of polishing and the like. The device mainly comprises a six-freedom-degree industrial robot, an abrasive belt grinding mechanism and a numerical control rotary table, wherein the abrasive belt grinding mechanism which is arranged in a triangular structure is connected with an end joint of the robot through a flange; a motor achieves high-speed rotation of an abrasive belt driving wheel through a synchronous belt; a pneumatic mode drives a tension wheel to achieve abrasive belt tension; a workblank of the controllable pitch propeller is installed and clamped in the center of the rotary table; and a servo motor drives an output gear of a reduction box to be meshed with a gear ring of a slewing bearing so as to achieve continuous 360-degree rotating and indexing. The abrasive belt grinding device is ingenious in structural design and high in grinding rigidity and universality, reduces the production cost greatly and has excellent practical and promotional values.

A five-axis grinding wheel grinding processing method for a planar enveloping hourglass worm adopts a five-axis numerical control machine tool, the grinding plane of a grinding wheel coincides with the tooth surface of a virtual gear and the grinding wheel rotates around the rotating axis of the virtual gear through five-axis linkage of the machine tool according to a forming principle of the planar enveloping hourglass worm, a worm workpiece rotates around own axis simultaneously, the rotating speeds and directions of the grinding wheel and the worm workpiece are determined according to the rotating direction and the transmission ratio of a worm gear pair, the distance between the axis of the virtual gear and the axis of the worm workpiece is equal to the center to center distance of the worm gear pair, so that the tooth surface of the planar enveloping hourglass worm is ground through planar enveloping of the grinding wheel. The five-axis process technology is applied to grinding processing of the planar enveloping hourglass worm for the first time, and the grinding range and the grinding precision of the planar enveloping hourglass worm can be increased remarkably by using the flexibility and precision of the five-axis processing machine tool.

The invention discloses a turntable type full-automatic blade grinding machine. The machine comprises a console; the console is provided with an indexing plate controlled by a stepper motor; the indexing plate is arranged on the console through a turntable, and is provided with multiple tools for clamping a trimming scissor blade at equal intervals; the console is provided with multiple grinding mechanisms for grinding the trimming scissor blade clamped on the grinding tools and support rods corresponding to the grinding mechanisms; the grinding mechanisms include frames rotationally arranged on the console; one ends of the frames are rotationally connected with the support rods; pulleys are arranged at the lower parts of the frames; rotary driving motors are arranged on the frames; and driving shafts of the rotary driving motors are provided with driving gears engaged with fluted discs. The turntable type full-automatic blade grinding machine adopts multi-station synchronous grinding, realizes full-automatic machining of edge grinding of the trimming scissor blade, and greatly improves the grinding precision and the machining efficiency.

The invention relates to an automotive brake pad production line which comprises a tabletting device, a thermal treatment device, a grinding device, a drilling device, a code spraying device and a conveying device connected among the former. Through the tabletting device, a concave die can be closely clamped, so that position of the concave die can be adjusted accurately; through the thermal treatment device, an automotive brake pad storage shelf after being subjected to thermal treatment can be automatically conveyed to a goods storage area, and heat transfer efficiency of a drum brake pad is improved; through the grinding device, an automotive brake pad is closely clamped, and position of an automotive brake pad clamp can be adjusted accurately, so that grinding accuracy is improved remarkably; through the drilling device, the automotive brake pad is closely clamped, the position of the automotive brake pad can be adjusted accurately, and a clamping clamp can be accurately positioned, so that drilling accuracy is improved remarkably; through the code spraying device, the brake pad is clamped closely, code spraying accuracy is improved, and one-step code spraying forming of multiple batches of brake pads is realized.