283results about "Worms" patented technology

A milling head for thread whirling, the milling head includes a plurality of cutting elements evenly disposed around a center hole, each cutting element in the plurality of cutting elements includes at least two cutting surfaces formed thereon. Any one of the at least two cutting surfaces is selectable to extend within the center hole for contacting a work-piece. Each cutting element in the plurality of cutting elements is disposed in a recess formed in a face of the milling head, with each recess defining at least two walls. Each of the at least two walls contacts a side of the cutting element to align the cutting element in a predetermined relationship with respect to the milling head. In one embodiment, the plurality of cutting elements include first and second sets of cutting elements. The first set of cutting elements is evenly disposed around the center hole and contact the work-piece to produce a thread form on the work-piece. The second set of cutting elements is evenly disposed around the center hole and contacts the work-piece to remove material proximate the outside diameter of the work-piece.

A radius-forming dressing roll (32) having a frustoconical working region (48) and an adjoining concave-toroidal working region (49) is mounted on the dressing spindle (30) coaxially to a dressing disc (31). In a first step, the flanks (42, 43) of the grinding-worm thread are profiled with the disc (31). After the dressing spindle (30) has been pivoted, the two tip radii (46, 47) and the cylindrical outer circumference (45) are profiled with the dressing roll (32). With little resetting effort and high flexibility, the method permits profiling with short dressing times.

The invention belongs to the field of gear manufacturing, and relates to a worm grinding wheel gear grinding surface distortion compensation method which solves the problem of tooth surface distortion of a bevel wheel gear with axial modification in the grinding process. According to the worm grinding wheel gear grinding surface distortion compensation method, dressing movement is different from a standard worm grinding wheel dressing process, deflection movement of a diamond rolling wheel is needed, and axial screw lead and a spiral angle of the grinding wheel are changed. The method comprises the steps that firstly, according to the wheel gear grinding technology, the worm grinding wheel is divided into a coarse grinding zone, a fine grinding zone and a middle transition zone in the width direction, the diagonal grinding principle is utilized, and appropriate diagonal ratio is selected to make a strict mapping relation exist between the section in the width direction of the wheel gear and the section in the width direction of the worm grinding wheel; secondly, according to distortion amounts of the left tooth surface and the right tooth surface of each section of the wheel gear to be machined, distortion compensation of each tooth surface is achieved by utilizing two methods of combining a deflecting rolling wheel and changing the axial screw lead of the grinding wheel. Due to the fact that excursion exists in the deflection center of the diamond rolling wheel, when deflection exists on the rolling wheel, calculation and compensation need to be conducted on the position variation quantity of a tooth profile of the rolling wheel.

The present invention provides an apparatus (100) for forming circumferential grooves (14) in the exterior surface of a linear member (10), such as a tube. The grooves are formed by rotating a cylindrical cutting element (120) around the tube such that cutting means in the cylindrical cutting element form the grooves. One rotation of the cylindrical cutting element causes multiple grooves to be formed in the surface of the tubes.

The technology provides a multi-start worm milling machine with high indexing accuracy. The multi-start worm milling machine comprises a base, a main shaft box and a cyclone milling head, wherein the main shaft box is used for driving a processed worm to rotate, the cyclone milling head is used for milling the processed worm and comprises a milling cutter, the main shaft box comprises a box body, a main shaft actuating mechanism, a main shaft transmission mechanism and a main shaft, the main shaft actuating mechanism drives the main shaft to rotate through the main shaft transmission mechanism, the main shaft actuating mechanism is a main servo motor, and the main shaft transmission mechanism adopts a worm gear for transmission.

The invention discloses an online detection and correction machining method for an enveloping worm tooth surface. Ground finish is carried out on the enveloping worm tooth surface through four-axis linkage in combination with a virtual rotation center principle, online detection is conducted on the enveloping worm tooth surface through three-axis linkage in combination with a spherical measuring head, and machining precision of the enveloping worm tooth surface is obtained through comparison of a practical torus helical line obtained through measurement with a theoretical helical line; whether the machining precision of the enveloping worm tooth surface meets requirements is judged, source tracking processing is carried out on a machining error if the requirements are not reached, grinding program correction and machining tool adjustment is conducted on the machining error value obtained by means of source tracking, and then tooth surface correction ground finish is carried out; the process is repeated until the machining precision of the enveloping worm tooth surface meets the requirements. The method solves the problem of low precision of the enveloping worm tooth surface fundamentally, can be applied to machining tooth surfaces of planar double enveloping worms, toroid enveloping torus worms, involute enveloping torus worms and other enveloping worms, and has principle universality and wide application value.

A variable-tooth-thickness worm-type tool comprises a main body and a spiral blade distributed on the main body and featuring variable tooth thickness. The main body and the spiral blade are respectively described with a rack cutter coordinate system and a tool coordinate system. The vector parameters based on the rack cutter coordinate system are transformed into vector parameters based on the tool coordinate system so as to simulate the main body with a rack cutter and develop the spiral blade to have variable tooth thickness. Thus, when a gear blank is tooled, the distance between the centers of the tool holder and the workpiece holder can be set as a constant, and the feed in the radial degree-of-freedom can be neglected, with twists of tooth flanks being inhibited.

The invention provides methods for designing and manufacturing double-lead linear contact bias worm drive, belonging to the fields of machinery principle and machinery manufacture. The double-lead linear contact bias worm drive belongs to the spiroid drive mode in the worm gear drive. The designing method in the invention has the following steps: 1. determining basic parameters according to the power, the transmission ratio and the rotating speed required to be transmitted; 2. performing parameter designing by taking a specified reference circle as a standard on the basis of preliminary calculation of the outer diameter of a worm gear; and 3. calculating each parameter in terms of the formula deduced from the above parameter designing. The manufacturing method in the invention comprises a mitting method, a fly-cutter hobbing method and a numerical control turning method. The invention has a simple and precious designing method, which can simplify the structure of the worm gear and machining and manufacturing; the current machine tool and cutter can be used to perform machining on tooth surfaces without adding other devices or using special machine tools and cutters except for adopting a special machine tool for efficient and high precision machining.

The illustrative embodiments provide a method, apparatus, and computer usable program product for generating datamatrix barcodes on parts. A digital datamatrix code associated with a machined part on a numerically controlled machine tool is converted into an x-y drilling pattern contained in a numerically controlled program. A drill cycle associated with a numerically controlled program defines a pattern of dots to be drilled in the machined part to form a dot pattern. A dot pattern is drilled as a series of partially drilled holes on a surface of the machined part to form a datamatrix barcode mark.

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 present invention provides a five-simultaneously-working axis computerized numerical controlling system tooth cutting machine tool for toroidal worms, comprising two parts a body of the machine tool and a controlling cabinet. The body comprises a bed, a spindle box with a spindle, a longitudinal sliding table, a traverse slider, a vertical guideway mounted on the slider and a tailstock, a cutter rest that supports a rotating cutter head is mounted on the vertical guideway. The spindle rotates about A-axis thereof, the table longitudinally slides along Y-axis relative to the bed, the cutter head rotates about B-axis thereof and transversely shifts X-axis as well as the cutter head makes up or down shift along Z-axis of the vertical guideway. The controlling cabinet is equipped with the programs for controlling spindle rotation and for controlling the shifting along longitudinal, transverse and vertical directions as well as the rotation of the cutter head so as to make the rotation about or the shifts along five axes of A, B, Y, X and Z have simultaneously work together to control the shifting of the cutting edges of the cutter on the cutter head and simulate the rotating motion of an inclined plane in space in order to envelop cut the tooth flanks of plane enveloping toroidal worms. The effect of this invention shows that the rotating speed of cutter shaft and workpiece shaft can make the cutting velocity up to 200 m/min, and the working efficiency is six to seven times higher than that of worm grinding, the productivity can greatly be improved.

By finding a range of an allowable error of maximum meshing position of a worm shaft in an axial direction relative to a worm wheel, that is higher than that of a worm shaft of a conventional worm gear unit, a worm gear unit of the present invention is provided.

The invention discloses a digital control five-axis three-linkage enveloping worm whirlwind stock-removing machine which mainly consists of a lathe bed, a cross slide, a tailstock, a spindle, and a vertical planker; a turning mechanism is arranged on the cross slide; a whirlwind tool rest is installed on the turning mechanism; a cutter head is installed on the whirlwind tool rest; a plurality of cutting knifes are symmetrically installed on the cutter head; the central rotation axis of the spindle is an X axis; the central rotation axis of the turning mechanism is a Y axis; a horizontal kinematic axis of the cross slide is a Z axis; the central rotation axis of the cutter head is an A axis; the rotating shafts of a cutter head mounting bracket and a motor mounting bracket on the whirlwind tool rest are a B axis; the machine tool has the movement along the five axis-A, B, X, Y, Z; and linkage function can be realized along the directions of the three axis-X, Y, and Z; by controlling of the movement of the cutting edge of the cutting knife, a planar enveloping hourglass worm gear surface can be processed out. The digital control five-axis three-linkage enveloping worm whirlwind stock-removing machine has the advantages of processing the enveloping worm rapidly with high precision under high speed cutting state; and the production efficiency can be greatly improved.

A machining apparatus for machining a workpiece by rotating and revolving either the workpiece or a tool 1 to contact with each other. The machining apparatus comprises rotation/revolution ratio setting motors M1 and M3 for setting a ratio of a number of rotations to a number of revolutions of the workpiece or the tool 1, to a numerical value having a fraction below a decimal point, by changing the number of revolutions. The workpiece is machined by setting the number of revolutions and the number of rotations at the ratio.

The invention relates to a five-axis side milling method for a planar double-enveloping worm, which includes the processing steps of selecting a side milling cutter, determining side milling process parameters, roughing the bottom surface of a worm tooth root by means of five-axis linkage, roughing tooth surfaces on two sides of the worm by means of side milling, performing quenching heat treatment, finishing the bottom surface of the tooth root by means of five-axis linkage and finishing the tooth surfaces on the two sides of the worm by means of five-axis linkage side milling. The five-axis side milling method is characterized in that a side milling tool path is completely generated according to a tooth surface meshing contact line of the worm, a roughing side milling tool path is generated by offsetting the contact line along the normal direction of the tooth surfaces by the distance of roughing allowance, and a finishing side milling tool path is generated by completely overlapping a tool side blade with the tooth surface contact line. The five-axis side milling method effectively solves the problem of uneven roughing allowance of the planar double-enveloping worm, and finishing efficiency and tooth surface processing accuracy are improved.

An indexable cutting insert has at least first and second cutting edges and first and second edge-location surfaces associated with the first and second cutting edges, respectively. The insert-manufacturing procedure includes forming the first edge-location surface with reference to the first cutting edge, and then forming the second edge-location surface with reference to the second cutting edge. There results an indexable cutting insert having at least two spaced-apart chip-removing cutting edges and a plurality of location surfaces adapted to engage a base body for determining the spatial positions of respective cutting edges, wherein each location surface determines the spatial position of no more than one of the cutting edges.

The present invention proposes a process for producing threads, especially for boring rods or the like, wherein the workpiece and the lathe tool have a relative rotary motion at a high velocity about an axis of the workpiece and a relative longitudinal motion at a low velocity compared to the above velocity, and wherein an oscillating radial relative rotary motion is brought about, furthermore, between the lathe tool and the workpiece, wherein the radial oscillating motion is generated mechanically, the radial oscillating motion being synchronized, in particular, with the relative rotary motion. The present invention pertains, furthermore, to a device for producing threads by a means for generating the radial mechanical oscillating motion, where the radial oscillating motion is synchronized, in particular, with the relative rotary motion.

A thread mill that is to be moved along a helical interpolation path while being rotated about an axis of the thread mill in a rotating direction, for forming a thread in a circumferential surface of a workpiece. The thread mill includes a cylindrical main body having (a) at least one spiral flute formed in an outer circumferential surface of the cylindrical main body, and (b) at least one cutting edge each provided by a rear-side one of widthwise opposite edges, as viewed in the rotating direction, of a corresponding one of the at least one spiral flute. Each of the at least one spiral flute extends in a direction opposite to the rotating direction as viewed in a direction away from a proximal end of the cylindrical main body toward a distal end of the cylindrical main body. Also disclosed is a method of forming the thread by using the thread mill.

The invention relates to the technical field of turning methods, in particular to a method for processing a helical surface of a toroidal worm by a numerically controlled lathe. The method comprises the following steps of: clamping a to-be-processed worn on the numerically controlled lathe, wherein the plane where the to-be-processed worm is located is S, n and n1 are separately two instantaneous positions, generated when a toothed slot changes as the toroidal worm rotate, of a point on the side surface of a toothed slot in the axial section extending section; moving the tool nose on the corresponding surface of a cut-off tool to the point n, performing bootstrap program for enabling the corresponding tool nose to move to the point n1, carrying out interpolation motion by taking R+m as a cutting radius from the point n1, processing out a circular-arc helical line of one side surface, withdrawing the tool to the initial point n, and cutting a circular-arc helical line of the other side surface in the similar way, thereby completing cutting of the helical surface of the worm. A to-be-processed initial point is determined by performing the bootstrap program, so that the position of the to-be-processed initial point can be accurately determined, dependence on a special numerical-control machine tool is avoided, technical requirements on an operator worker are reduced, manufacturing cost is reduced, the to-be-processed point can be found once, and processing efficiency is greatly improved.