252 results about "Shape change" patented technology

The invention discloses a reversible metal 4D printing method based on hydrogel reversible deformation and a metal part, and belongs to the field of metal additive manufacturing. The method comprises the following steps: firstly, constructing a three-dimensional model comprising a hydrogel driving layer and a metal blank layer; respectively preparing hydrogel light-cured ink and metal or precursor slurry thereof; printing the two layers of materials sequentially or alternately by adopting a photocuring printer to obtain a composite green body; the hydrogel layer is dehydrated and shrunk through drying, the component is driven to generate preset shape deformation, the hydrogel layer absorbs water and expands through soaking, and reversible recovery of the shape of the component is achieved; and degreasing, selective reduction and sintering heat treatment are conducted on the component, and the compact final metal component is obtained. According to the invention, the independent hydrogel layer is used as a deformation driver, the dependence on the intrinsic phase change characteristic of a metal material is avoided, the material universality is extremely high, the method can be widely applied to 4D printing of various materials including refractory metal and high-reflection metal, and reversible control of shape change is realized.

The method comprises the following steps that a paint nozzle and a distance measuring device are installed at the tail end of the mechanical arm, and an assembly at least comprises a set of distance measuring devices with adjustable distance measuring directions; determining a reference time source, and stamping reference timestamps for all ranging data; before paint spraying or during operation, a distance measuring device scans the surface of a front workpiece to obtain front distance measuring data, and the shape change trend of the surface of the workpiece is predicted in combination with a reference timestamp and the moving speed of a mechanical arm; the distance measuring device measures the vertical distance between the nozzle and the surface of the workpiece in real time to obtain center distance measuring data. And generating a control instruction based on the two types of data, dynamically adjusting the tail end position, speed and / or posture of the mechanical arm, and maintaining the preset vertical distance and / or angle between the nozzle and the surface of the workpiece. Dynamic distance measurement, interference resistance, foresight prediction and real-time regulation and control are integrated, and high-quality automatic paint spraying operation on non-specific workpieces through the mechanical arm can be achieved.

A numerical control device includes an NC command decoding unit and a tool information storage / generation unit. The NC command decoding unit has a cut amount decoding unit for decoding the cut amount for rough machining, a machining shape generation unit for generating a finishing shape, a machining pathway generation unit for generating a path for rough machining, a tool direction provisional determining unit for provisionally determining the direction of the tool, a path joining assessment unit for assessing whether or not to omit a round-up operation, a machining path joining unit for generating a new path for directly moving to the end point of the next operation after the round-up operation if the round-up operation is to be omitted, and a tool direction determining unit for determining the direction of the tool at each machining shape change point on a path for rough machining including the new path.

The invention provides a slitting equipment control instruction generation and execution scheduling method, which comprises the following steps of: acquiring and fusing a tension value, a warping height value, thickness distribution data and surface smoothness in a steel belt conveying process, and identifying a bending stress residual condition generated by non-uniform thickness or winding storage of a steel belt; generating a comprehensive abnormal state evaluation result of the steel belt; according to the offset distance and the position distribution of the center line, performing partition marking on a deformation area in the width direction of the steel strip by combining the area thickness difference identified by the thickness distribution data, and extracting a stable section position with a warping height deviation value smaller than a preset threshold value and relatively uniform thickness; determining a dynamic datum line position adaptive to the real-time shape change of the steel strip based on the stable section position data; according to the dynamic datum line position, a transverse movement distance control instruction of the slitting cutter and a corresponding feeding depth preset value are generated in combination with the thickness distribution data, and a difference value between the control instruction and the current actual position of the cutter is obtained.

To provide a method and a system for precisely aligning chiplets with bonding sites.SOLUTION: A bonding system for aligning chiplets 22 to a substrate 25 includes acquiring an image of an area on the chiplet with an alignment microscope 145 or an upward microscope 141, measuring a deviation from planarity of the area on the chiplet, estimating a chiplet position error of the chiplet on the basis of at least the image of the area and the deviation from planarity of the area, and adjusting a relative position of the chiplet to the substrate based on the chiplet position error.SELECTED DRAWING: Figure 1

The embodiment of the invention discloses a shape sensing method and system for a rope-driven continuum robot, at least two flexible sensors fixed in a spiral mode are arranged on a flexible framework, and the method comprises the steps that a universal shape sensing model is established based on a constant curvature hypothesis; for any joint module, driving the joint module to a test shape, and solving an actual fixed position of the flexible sensor by adopting a numerical iteration method based on the general shape sensing model; driving the joint module to a working shape, and solving an output value of a flexible skeleton shape parameter by adopting a numerical iteration method based on a general shape sensing model and an actual fixed position of the flexible sensor; and determining the shape of the robot based on the output value of the flexible skeleton shape parameter corresponding to each joint module. According to the method, the fixing precision does not need to be considered when the flexible sensor is fixed, the shape change of the robot is accurately sensed by establishing and calibrating the model, and the problems of high sensor mounting precision requirement and poor sensing reliability in an existing method are solved.

A multi-directional loading spin forming method for improving the wall thickness uniformity of corrugated pipes includes: mounting the fixed end of the pipe blank on a mandrel, with the free end of the pipe blank contacting the end face of a thrust plate; assuming that the wall thickness of the pipe blank remains constant during the spin forming process, with only the shape changing, the pipe blank is discretized into n micro-elements along the axial direction, maintaining the volume of each micro-element after deformation equal to that before deformation; based on the length difference of each micro-element before and after deformation, the specific displacement of the thrust plate when the spinning wheel moves to different waveform regions during the spin forming process can be obtained, and the axial displacement curve of the thrust plate is plotted to obtain the tail axial loading path; rotating the mandrel so that the spinning wheel contacts the pipe blank radially, the spinning wheel feeds according to the target waveform curve of the corrugated pipe, and simultaneously the thrust plate feeds according to the tail axial loading path, obtaining a corrugated pipe with better wall thickness uniformity. Compared with the spin forming results of the prior art, the maximum wall thickness difference of the corrugated pipe formed by the process of this invention is reduced by 25%.

The invention discloses a small hardware stamping device, and particularly relates to the technical field of hardware machining, the small hardware stamping device comprises a rack, a first supporting frame is mounted on the outer side of the top of the rack, a lower die structure is mounted in the center of the first supporting frame, and a hydraulic cylinder is mounted in the center of the top of a second supporting frame; an upper die structure is installed at the bottom of a piston rod at the output end of the hydraulic cylinder, containing grooves are formed in the two sides of the front side of the first supporting frame, and a clamping device is installed in each containing groove. According to the stamping device for the small hardware, the clamping device is linked through a guide rope and the like, a metal sheet is accurately clamped and is adaptively attached along with the deformation of the metal sheet, and the stamping precision is ensured; the L-shaped clamping blocks can prevent finished products from being lifted along with the upper mold, the demolding problem is solved, when the upper mold is reset, the driving mechanism drives the material moving mechanism to automatically transfer the finished products and supplement new materials, continuous production is achieved in combination with the discharging groove, and efficiency is improved.

The utility model discloses a PCB clamping jaw, a PCB carrying mechanism and PCB assembling equipment. The PCB clamping jaw comprises a clamping jaw base plate, a first linear module, a first clamping jaw assembly and a second clamping jaw assembly. The first linear module extends along a first direction; the first clamping jaw assembly and the second clamping jaw assembly are connected to the clamping jaw base plate through a first linear module and suitable for relatively moving in the first direction under driving of the first linear module so as to clamp a PCB; at least one of the first clamping jaw assembly and the second clamping jaw assembly is provided with a flexible abutting portion, the flexible abutting portion is suitable for abutting against a PCB substrate, when the PCB is clamped, the flexible abutting portion on the first clamping jaw assembly or the second clamping jaw assembly makes contact with the edge of the PCB substrate and deforms, the flexible abutting portion adapts to the shape change of an electronic element on the PCB, and the electronic element is clamped on the PCB substrate. And electronic components are not damaged.

To design an additively manufactured body that has strength equivalent to that of a desired injection-molded body. [Solution] The shape design method includes the steps of: dividing the shape of an anisotropic additive manufacturing body into an invariant region where shape changes are not permitted and a variable region where shape changes are permitted; designing the resulting variable region based on the rigidity of an injection molded body having the same shape as the anisotropic additive manufacturing body; performing structural analysis calculations using a structural analysis model of the additive manufacturing body obtained by combining the designed variable region and the invariant region; and determining whether the rigidity and strength of the additive manufacturing body obtained by the structural analysis calculations are within an acceptable range.

The utility model discloses a robot protective cover, which relates to the field of protective covers, and comprises an upper mounting frame, one side of the inner wall of the upper mounting frame is rotatably connected with a back mounting frame, the bottom of the back mounting frame is rotatably connected with a base fixing frame, and the other side of the inner wall of the upper mounting frame is rotatably connected with a telescopic frame mechanism. And a sliding block is fixedly arranged on one side of the telescopic frame mechanism. Through the arrangement of the protection steel sheets and the limiting blocks, when the robot ascends and descends, the multiple sets of protection steel sheets stretch out and draw back, the limiting blocks slide in the limiting grooves, the multiple sets of protection steel sheets are stretched out or drawn back, and when the angle of the robot is adjusted, the telescopic frame mechanism and the back mounting frame rotate along with the robot; and the multiple limiting blocks drive the multiple protection steel sheets to transversely move, so that the effect that the shape of the protection cover is changed along with lifting and angle adjustment of the robot is achieved, the protection cover does not affect operation of the robot, and the protection effect is good.

Provided is a substrate fabrication method allowing for easy separation of a carrier and a device layer. This substrate fabrication method includes: a step for preparing a laminate comprising, in the following order, a release layer and a device layer on a carrier; a step for obtaining a laminate with a resin layer by laminating a curable resin–containing resin layer on the carrier-side surface of the laminate; a step for changing the shape of the carrier or the laminate with a resin layer by subjecting the laminate with a resin layer to a curing treatment of the curable resin to shrink the resin layer, thereby pulling the carrier in a direction that follows the shrinkage of the resin layer; and a step for generating shear stress between the carrier and the device layer by utilizing the shape change of the carrier, thereby releasing the device layer from the laminate with a resin layer at the position of the release layer.

The invention discloses jig direction adjusting equipment, which belongs to the technical field of automatic production lines and comprises a rack, a speed chain conveying line fixedly mounted on the rack and a tool plate matched with the speed chain conveying line for use. A jacking mechanism, a direction adjusting mechanism and a stop positioning mechanism are mounted on the rack, and the direction adjusting mechanism comprises a supporting frame, a linear sliding table, an upper mounting frame, a lower mounting frame, a vertical floating assembly, a horizontal floating assembly and a direction adjusting assembly; by means of the mode, in the direction adjusting process, the vertical floating assembly and the horizontal floating assembly are matched, so that the direction adjusting assembly has the floating performance in the transverse direction, the longitudinal direction and the vertical direction, and the direction adjusting assembly adapts to the position deviation and shape change of the positioning jig; all the components are matched to achieve automatic and accurate orientation adjustment of the orientation of the positioning jig on the tool plate, and the requirement for continuous machining of batched workpieces is met.

The present application relates to the technical field of monitoring drilling and grouting integrated construction, and particularly relates to a visual monitoring method for drilling and grouting integrated construction. The present application can obtain the drilling shape in real time through a multispectral visual network, and periodically correct drilling operation parameters based on the drilling shape change rate, so as to more accurately adjust the drilling operation parameters based on the drilling condition, inject slurry into the stratum through the inner cavity of the drill rod connected with the grouting pump, and thus perform grouting operation at a suitable time, thereby improving the efficiency of drilling and grouting integrated construction. The construction state is determined based on the slurry diffusion radius, and whether to adjust the grouting pressure and the correction period of the drilling operation parameters is determined based on the construction state. The present application can be adjusted in time when the slurry flow path is blocked during drilling and grouting, thereby improving the drilling and grouting efficiency.

The application discloses a kind of automobile frame welding positioning fixture and welding process, it is related to automobile frame welding field, including welding table, the top surface of welding table is equipped with inner clamping mechanism, four are provided in the inner clamping mechanism, wherein one end of two inner clamping mechanisms is equipped with end clamping mechanism, one side of the inner clamping mechanism is equipped with outer clamping mechanism.The application is installed by the mounting plate of corresponding number of top pressure mechanism and linear drive mechanism according to the actual shape of the frame, the position of the top pressure mechanism is adjusted, the cylinder four control pressure rod is accurately pressed and contacted on the frame outside to be fixed, the installation of top pressure mechanism is facilitated by the setting of four linear drive mechanisms according to the needs of users, the top pressure mechanism is quickly disassembled by plug-in design, so that the application can adapt to the size and shape change of different vehicle models of frame, the frame is stably fixed and clamped, the versatility of the device is improved, and welding processing cost is reduced.

The utility model provides a carrying lifting appliance and a carrying stacking tool. The carrying lifting appliance comprises a connecting beam; the overturning assembly is arranged at the first end of the connecting beam; the clamping assembly is connected with the overturning assembly, and the clamping assembly is connected with the overturning assembly; the first driving part is arranged between the connecting beam and the overturning assembly, and the first driving part drives the clamping assembly to overturn through the overturning assembly; round or square parts and the like can be clamped and fixed in the carrying process through the clamping assembly, the stability of carrying the parts is improved, the first driving part transmits power to the clamping assembly through the overturning assembly, the clamping assembly can be rapidly and accurately switched between the horizontal direction and the vertical direction, and the clamping assembly is convenient to operate. And the requirement for workpiece carrying form change in different working scenes is met. The overturning efficiency of the workpiece is improved, and the requirement for shape change of the workpiece in the carrying process and the placing process can be met.

This invention relates to the field of fragrance processing technology, and more particularly to a fragrance extrusion device. The invention provides a fragrance extrusion device capable of adjusting the shape of the spice blocks as needed. A fragrance extrusion device includes a base, a guide rod, a lifting platform, and pressure columns. A guide rod is connected to the upper side of the base, and a lifting platform is slidably connected to the guide rod. Several pressure columns are equidistantly connected to the lower side of the lifting platform. Several material grooves adapted to the pressure columns are equidistantly opened on the upper part of the base. When the pressure plate moves downwards to engage with the material grooves on the base, it can extrude powdered raw materials into square spice blocks. When a shape change is required, the pressure plate is controlled to move upwards, causing a circular block to extend downwards. Then, an adjusting block is controlled to move upwards to block the material grooves. At this time, the circular block moves downwards to engage with the adjusting block, extruding the powdered raw materials into circular spice blocks. Thus, the shape of the spice blocks can be adjusted as needed.

The application discloses electric power fitting fixing frame, belongs to electric power fitting field, including two groups parallel distribution's main frame, two groups main frame outer surface fixedly connected with movable rod, movable rod rotationally connected with support rod one, support rod one outer surface upper and lower sides rotationally contact with main frame outer surface, two groups main frame between be provided with buffer assembly, buffer assembly include with support rod one outer surface fixedly connected with movable sleeve, main frame outer surface open with guide groove.Can realize through setting buffer assembly, through the shape change of capsule can effectively buffer absorption to support rod one received impact, thereby can effectively reduce the impact that support rod one received, not only can effectively reduce the vibration amplitude of split conductor, thereby can reduce the probability that whip of wire between each other occurs, simultaneously also can effectively improve the installation stability of wire.

The utility model relates to a short boat deformation testing mechanism and quartz boat detection equipment, a short boat comprises a first end face, a second end face and a plurality of first boat rods, the first end face and the second end face are respectively connected with two ends of the first boat rods, and the short boat deformation testing mechanism comprises a first positioning assembly and a second positioning assembly. The first positioning assembly clamps the first end face and positions the first end face; the second positioning assembly acts on the second end face and comprises a first abutting piece and a first distance measuring instrument. The number of the first abutting pieces is at least two, and the multiple first abutting pieces can movably abut against at least two non-parallel side edges of the second end face respectively. According to the scheme, the number of the first abutting pieces is at least two, and the multiple first abutting pieces can be movably abutted against at least two non-flat side edges of the second end face, so that the mechanism can measure the deformation degree of the multiple non-flat side edges of the second end face, and the detection efficiency of the deformation quantity of the side edges of the second end face is effectively improved.

Provided is a pneumatic tire for heavy load, which is capable of suppressing shape change caused by running and achieving improvement in cornering wear resistance. The tire (2) has a nominal flat ratio of 65% or less. The tire (2) has a tread (4) and a reinforcement layer (20). The reinforcement layer (20) has a belt layer (38) including a plurality of belt cords (44) arranged side by side, and a crown layer (40) including crown cords (52) wound in a spiral shape. The belt layer (38) has a plurality of belt plies (42) arranged in a radial direction. The crown layer (40) has a full crown layer (48) having two ends (48e) opposite across the equatorial surface, and a pair of edge crown layers (50) located radially outward of the ends (48e) of the full crown layer (48). In the axial direction, the ends (48e) of the full crown layer (48) are located outward of shoulder circumferential grooves (28s) formed on the tread (4).

The utility model relates to the technical field of foundation pit supporting, and discloses a stabilizing frame for supporting a foundation pit in a soft soil layer, which comprises two bases, a cross beam is fixedly connected to the top ends of the bases, a connecting piece is fixedly connected to the left side of the top end of the cross beam, an inclined strut is rotatably connected in the connecting piece, and a stand column is fixedly connected to the top end of the cross beam. Adjusting assemblies are arranged on the sides, close to each other, of the two stand columns, and supporting assemblies are arranged on the sides, close to each other, of the two inclined struts. The adjusting assembly comprises a first mounting frame, and the first mounting frame is fixedly connected to the close sides of the two stand columns. According to the supporting structure, the angle between the stand column and the inclined strut can be accurately adjusted through accurate control of the first hydraulic cylinder, the first telescopic rod and the sliding block, the stability of the supporting structure is ensured, accurate supporting and adjusting can be provided under the condition that the shape change of a foundation pit is large, and the phenomenon that the supporting structure inclines or is not stable is avoided.

The utility model relates to tomato sorting technical field especially based on machine vision's tomato raw material sorting device, including mounting bracket, the mounting bracket is installed in the top of conveying unit, is located the inside fixed connection with sorting mechanism and visual identification component in the mounting bracket, wherein, the sorting mechanism is by angle adjusting assembly, bearing disc and sucking component and is composed, the universal joint structure swing joint is passed to between angle adjusting assembly bearing disc, the bearing disc is used for fixing sucking component, the utility model sets up fixed structure on the basis of the connection of the ball head and ball seat of manipulator through direct shape change butt joint, on one hand, the ball head piece is limited in the ball seat through the top cap and does not influence the normal universal adjusting effect between ball head piece and ball seat, on the other hand, still can dismantle and replace the ball head piece through the mode of dismounting top cap, enough ensure that the ball head and ball seat can keep good fastening.

The utility model belongs to the switchgear technical field, specifically is a kind of switchgear cable sealing joint, including the fixed seat of fixed setting at the cabinet cable hole hole, the tapered hole of being communicated with the inside of cabinet is opened in fixed seat, further include tapered rubber sealing ring, and the driving component for pushing sealing ring shape change, driving component is by the abutting portion of insertion fixed seat and the fixed connecting portion of set in the fixed seat outer wall, with its thread cooperation, abutting portion is close to the tapered convex ring of sealing ring one end, sealing ring is correspondingly opened with the tapered recess of adaptation, and sealing ring circumferential place is equipped with convex, equidistantly set in on abutting portion Assembly through-hole, hole is equipped with linkage arm, fixed seat inner wall is equipped with the convex ball that can drive linkage arm to swing towards axis, driving component and fixed seat assembly, realize double sealing and cable fixation simultaneously, improve protection level and installation efficiency.

This invention belongs to the field of soft alloy sheet rolling, specifically disclosing an alloy sheet rolling device, including a rolling frame, a feeding mechanism, a straightening device, and an adaptive rolling mechanism. Through screw-driven dual-stage roll gap adjustment and gear-type width correction, it achieves rapid shape change and anti-skewing conveying of soft alloy sheets of various thicknesses. Combined with a spiral-guided cooling chamber to enhance heat dissipation, and an adjustable lever with adjustable weights for adaptive pressure application to solve the problem of localized protrusions during rolling, and multi-roll linkage drive and anti-slip protrusions to ensure stable conveying, this invention overcomes the pain points of traditional devices such as slow shape change, uneven cooling, low precision, and easy slippage. It reduces finished product thickness deviation, improves finished product surface finish, increases shape change efficiency, and meets the high-quality rolling requirements of soft alloy sheets of various specifications.

The utility model relates to the technical field of glass bending, and provides a glass bending assembly which comprises a deformation bending mechanism used for bending glass and changing the shape and a driving mechanism connected with the deformation bending mechanism. When the glass is bent, the driving mechanism drives the deformation bending mechanism to move towards the bending direction of the glass; and after the glass is bent, the driving mechanism drives the deformation bending mechanism to reset. The deformation bending mechanism can adjust the self structure in real time according to the actual bending form of the glass, and the problem of stress concentration caused by the fact that a traditional rigid bending mechanism cannot adapt to glass deformation is effectively solved. The dynamic adaptive mechanism obviously improves the bending precision, is particularly suitable for forming processing of bending the glass at 90 degrees, and meanwhile, reduces the risk that the glass cracks or is damaged in the bending process.

The utility model provides an engine intercooling pipe assembly which comprises a deformation buffering piece, the deformation buffering piece is installed between the outer wall and the inner wall of the inner side of a pipe opening of a straight pipe section, the deformation buffering piece comprises a plurality of sets of buffering rods used for buffering deformation, the buffering rods are located in an annular area on the right side face of an installation disc, and an abutting ring is arranged on the right side face of the installation disc. Compared with the prior art, the utility model has the following beneficial effects: by arranging the deformation buffer piece, high-temperature gas enters the interior of the pipe orifice through the gas inlet structure, and the straight pipe section part on the right side part of the pressing part of the fastening hoop is easily influenced by high temperature, so that the straight pipe section part expands and deforms; the part, close to the fastening hoop, of the straight pipe section is expanded and buffered through the elasticity of the buffer rods, so that the phenomenon of fracture caused by excessive deformation of the interface position of the intercooling hose can be effectively prevented, and the service life of the intercooling hose is prolonged.

The present application relates to a kind of tooling fixtures, including main body seat, shape change cover and control piece, main body seat has sliding track, shape change cover can occur radial expansion to change its maximum diameter, the distal end of control piece has prop open part, prop open part is configured to be inserted in shape change cover, and the maximum diameter of shape change cover is adjusted by adjusting its relative position with shape change cover, shape change cover is configured to be released or relative locking by the adjustment of its maximum diameter with the hole of the piece to be clamped, control piece is slidably connected with main body seat along sliding track, and the relative position of prop open part and shape change cover is adjusted by sliding relative to main body seat.The tooling fixture has strong universality, and the structure design is applicable to any size of carpal pad, and when carpal pad is clamped, it is convenient, fast, the inner prop clamping force of prop open part to the inner step hole of carpal pad is controllable, can reduce the deformation of carpal pad, reduce the deformation of carpal pad due to external force.

The invention relates to the field of production line intelligent clamp control, and discloses a production line intelligent clamp control method and system, and the method comprises the steps: collecting the 3D point cloud data of a workpiece, calculating the geometric features and shape errors of the workpiece through a point cloud processing algorithm, predicting and optimizing the clamping force, and optimizing the clamp task switching through combining PID control and a Q learning algorithm; compared with the prior art that the traditional fixture control method mostly depends on manual adjustment of the position and the clamping force of the fixture, the requirements of high precision and rapid adaptation are difficult to meet when the requirements of complex workpiece shapes and diversified operation are met, and particularly, the requirements of high precision and rapid adaptation are not met under the conditions that the shapes of workpieces are irregular and the surfaces have large errors. In order to solve the technical problem that the production efficiency is low due to the fact that a traditional method cannot efficiently adjust a clamp, clamping points are accurately selected through visual detection, workpiece form changes are automatically adapted, and the production efficiency of a production line and the workpiece clamping precision are remarkably improved.

Intraocular lenses are disclosed herein that include an optic portion and at least one tab having a proximal end coupled to the optic portion and a distal end. The tab includes a tab lumen extending through at least a portion of the tab. The tab may include one or more tab spacers disposed within the tab lumen. The one or more tab spacers may be configured to counteract or reduce unexpected shape changes caused by external energy directed to the tab.

A numerical control device comprises: a tool shape information storage / generation unit that generates and stores, as tool shape information, geometrical information relating to the shape of a multi-edge tool for turning; a machining shape information generation unit that generates machining shape information from relative movement direction information pertaining to the workpiece and the multi-edge tool and from positional relation information pertaining to the workpiece and the multi-edge tool; an edge direction determination unit that determines, from the generated tool shape information and the generated machining shape information, the edge direction of the multi-edge tool for each machining shape change point at which the machining shape changes; and a machining control unit that, on the basis of the edge direction of the multi-edge tool for each machining shape change point, controls the turning while changing the edge direction of the multi-edge tool between machining shape change points.