32results about How to "Guaranteed contour accuracy" patented technology

The invention discloses wire additive and reductive combination machining equipment. The wire additive and reductive combination machining equipment comprises an on-line metal arc welding wire additive manufacture device and a numerical control multi-axis linkage machining device, wherein the on-line metal arc welding wire additive manufacture device comprises a welding robot and a welder system; the welder system is arranged on the welding robot; the multi-axis linkage machining system comprises a three-dimensional measurement device and a multi-axis linkage precise machining system; the three-dimensional measurement device is used for measuring the outline information of a part and transmits the information to a computer; the computer is used for obtaining the real outline of the part through the received outline information, then compares the real outline with a theoretical three-dimensional model to obtain an error; and the multi-axis linkage precise machining system is used for performing wire reductive machining on the part, so that the error between the real outline and the theoretical three-dimensional model is controlled in a preset range. By adopting the wire additive and reductive combination machining equipment, the problem of a current precise machining method that a part with a complex shape can hardly be machined automatically is solved; and the advantages of arc welding wire additive manufacture of high efficiency, low energy consumption and high environment adaptability can be fully exerted.

The invention discloses a spline curve interpolation algorithm for high quality processing, and the spline curve interpolation algorithm for high quality processing comprises the following steps: quickly pre-interpolating the numerical control machining curve, recording the length of the interpolation path and the maximum/minimum value of the acceleration/deceleration process; calculating the maximum acceleration and most much acceleration of the acceleration/deceleration process, having subsection on the acceleration/deceleration process, calculating quadratic polynomial speed equations of each section; obtaining the speed equation according to the pre-interpolating stage at the real time interpolating stage, adopting the strategy that the theory chord length is close to the practical chord length for building the construction function, estimating the initial value of the interpolation parameter and building the parabolic interpolation polynomial, using the Newton iteration method for exactly calculating the interpolation parameter. The speed plan adopts five-section S curve acceleration/deceleration control algorithm for guaranteeing continuous change of the speed and accelerated speed, the bounded change of the accelerated acceleration speed and the running stability of the machine tool; the calculation of the interpolation parameter adopts the combination of parabolic interpolation method and Newton iteration method for controlling the feeding speed fluctuation of the real time interpolation in the ideal level and satisfying the high quality processing requirement.

The invention relates to an intelligent method for automatically regulating servo parameters for a numerical control machine tool. The method comprises the steps of collecting a speed instruction sequence of each feed shaft, creating a speed instruction sequence in a small band, extracting a maximum amplitude frequency of each band, and creating a two-dimensional time-frequency array based on timepoint and maximum amplitude frequency of the speed instruction sequence; then creating a servo parameter group of each feed shaft, extracting a servo characteristic parameter, creating a mapping of aservo parameter group and servo bandwidth; then creating a speed instruction attenuation sequence solving equation, a following error sequence solving equation of each feed shaft, a linkage trajectory error sequence solving equation, and a servo characteristic dynamic matching determining equation in sequence; and then searching each sampling position of the speed instruction sequence of each feed shaft, acquiring a servo bandwidth sequence of each feed shaft, converting the servo bandwidth sequence into a servo parameter group time-varying sequence of each feed shaft, and regulating the servo parameter of each feed shaft by the numerical control machine tool automatically according to the servo parameter group time-varying sequence. Through adoption of the method, a complex curve part isguaranteed to have an accurate outline at high feed speed.

The invention relates to the field of control of numerical control machine tools, and specifically provides method for adding pipeline interpolation on the basis of dynamically correcting motion track interpolation position according to the feedback of a grating ruler and other external connecting position sensing devices as well as a servo motor encoder so as to dynamically plan the motion tracks. The method is suitable for two-shaft and three-shaft coupling linear interpolation, two-shaft coupling arc-shaped interpolation and hybrid configuration of full-closed-loop feedback, full-closed-hoop feedback and semi-closed-hoop feedback. With the adoption of the method, the multi-shaft coupling contour precision, positioning precision and repeated positioning precision can be met, a servo motor can run stably, the processing precision of a workpiece can be ensured, and the service life of a machine can be prolonged. The method is high in adaptability, high in processing route contour precision, high in speed smoothness, high in dynamic performance and high in motion safety.

The invention discloses a front and rear blade edge robot abrasive belt grinding and polishing step optimization method. The method comprise the steps that firstly, a machining step is calculated based on an equal-chord-height error step method; secondly, the machining step is converted into a corresponding difference value in a curve parameter domain, and accordingly, the position of the next cutter location point is determined; thirdly, a practical chord height error is calculated based on a principle of distance from a point to a line and compared with a standard value, and whether chord height error deviation occurs or not is judged; and fourthly as well as finally, as for a curve segment with the deviation phenomenon, the current cutter location point curvature radius and the machining step are calculated all over again, the position of the next cutter location point is updated, and circulation is performed thus until path planning is completed. According to the front and rear blade edge robot abrasive belt grinding and polishing step optimization method, the situation of the chord height error deviation occurring when the equal-chord-height error step method is applied to cutter location point planning of a blade complex curved surface part is improved mainly, and particularly, in blade front and rear edge curvature large variation areas, the machining profile precision is guaranteed by increasing the cutter location point density in a self-adaption mode; and in blade smooth areas, cutter location points are kept sparse while the machining efficiency is also taken into consideration.

A circular-arc-shaped diamond grinding wheel dressing method comprises the steps that 1, micro water guide laser parameters are set, and tool setting is conducted; 2, radial rough modification is conducted, specifically, the working surface of a grinding wheel is equally divided into a plurality of cross sections which are L wide in the axial direction of a parallel grinding wheel, according to the different depths of feeding, in the axial direction of the grinding wheel, of the laser water beam, different depths H of abrasive layers are removed from the cross sections in sequence, and finally, the parallel grinding wheel is formed into a circular-arc-shaped grinding wheel through rough modification; 3, the surface profile precision of the grinding wheel is detected, height information ofall points on the surface is obtained, and tool setting is conducted; 4, cutting direction precise shaping is conducted; 5, micro water guide laser technology parameters are set, and tool setting is conducted; and 6, radial sharpening is conducted. According to the method, the high-energy high-density laser beam is guided through the water beam to remove the grinding wheel material in the fusion and gasification modes, a laser water beam variable rate scanning mathematic model is disclosed, the abrasive particle exposure height consistency is ensured, the dressed grinding wheel is good in surface appearance, the dressing precision is high, in addition, the dressing quality is ensured through water beam cooling, and energy saving and environmental protection are achieved.

The invention discloses a residual vibration suppression system and method for an industrial robot, and the system comprises an embedded industrial control computer with a real-time control function, an acceleration sensor, an acceleration signal transmission device, the industrial robot, and a servo controller of the industrial robot. The acceleration sensor is installed at the tail end of the industrial robot through an acceleration sensor fixing element, collected acceleration signals are connected into a servo driver of the industrial robot through an acceleration signal transmission device, and the servo driver is connected with the embedded industrial personal computer through a gigabit industrial Ethernet interface. The residual vibration suppression system provided by the invention is relatively simple and relatively low in cost, the industrial robot control platform has a real-time function, and the residual vibration suppression method provided by the invention can further improve the smoothness of track operation and reduce the impact on the motor in the operation process while realizing the maximum suppression of the residual vibration, so that the reliability of the system is improved. And the contour precision of the interpolation track is ensured.

The embodiment of the invention discloses a forming milling cutter and a manufacturing method of the forming milling cutter, and relates to the field of machining tool manufacturing. The forming milling cutter has the advantages that the manufacturing process is simple, and machining is easy. The forming milling cutter comprises a cutting part of a cutter body and a cutting edge arranged on the cutting part. The edge shape of the cutting edge is formed by overlapping edges of at least two blades in the axial direction. The method comprises the steps that the blades in the preset edge shape are machined; the cutter body with the preset contour is machined; and the blades are installed to the cutter body to overlap at least one cutting edge with the same contour as a part to be machined. The forming milling cutter is applicable to machining tool manufacturing and workpiece machining manufacturing, and particularly applicable to machining workpieces with complex contours such as turbine disc fir-tree-shaped blade roots and blades.

The invention discloses a composite material large wing surface I-shaped stringer wallboard forming tool, and belongs to the field of composite material wallboard and I-shaped stringer forming. The tool comprises a stringer laying and forming die, a cover plate forming die, a stringer pre-compaction die and a wallboard forming die. According to the tool structure form, manufacturing of the large wing surface I-shaped stringer wallboard is divided into the following steps that stringers and wallboards are separately laid; a set of soft film forming die is formed and used for ensuring the contour precision of the wallboards; and a group of stringer positioning structures is used, so that the stringers are accurately positioned in a combined state, and the positions of the stringers are not deviated in a curing process.

The invention relates to a matching method for a plunger assembly with a check ring. The matching method comprises the steps that (1) a sliding shoe, the check ring and a plunger are prepared; (2) the inner spherical surface of the sliding shoe is machined, and the size of the inner spherical surface of the sliding shoe is measured; (3) the sliding shoes are grouped according to the measurement size; (4) plunger outer spherical surfaces are machined according to the grouping condition of the sliding shoes, and grouping is conducted according to the sizes of the plunger outer spherical surfaces; 5) coloring the inner spherical surface of the matched sliding shoe by using the outer spherical surface of the plunger; (6) the inner spherical surfaces of the check rings are selected and machined according to the size b of the selected sliding shoes, and it is ensured that the a + b value of each set of check rings and sliding shoes meets the requirement and the difference value of each set is not larger than 0.01; and 7) polishing the outer spherical surface of the plunger, the inner spherical surface of the sliding shoe and the inner spherical surface of the check ring to finish matching. The plunger assembly can be efficiently selected and matched, and the service life of the plunger assembly can be effectively prolonged.

The embodiment of the invention discloses a method, device and system for determining a three-dimensional model of a to-be-detected object. The method comprises the following steps: enabling an elastic detection element arranged on an end effector to keep a predetermined contact force or contact moment to move on each surface of an object to be detected based on adjusting the position of the end effector of the robot; determining contour data of each surface based on the position adjustment amount of the end effector in the movement process of the elastic detection element on each surface; and determining a three-dimensional model of the to-be-measured object based on the contour data of each surface. According to the embodiment of the invention, the three-dimensional model of the to-be-measured object can be determined without laser scanning equipment, the cost is saved, and the method is also suitable for large-size to-be-measured objects. In addition, the embodiment of the invention has no special requirement on the photosensitive attribute of the to-be-detected object.