28results about How to "Reduce tool change time" patented technology

The utility model relates to the technical field of grooving cutters, and discloses a grooving cutter with a telescopic cutter bar, which comprises a fixed cutter bar, an adjusting cutter bar is slidably connected in the fixed cutter bar, a blade main body is mounted at one end, far away from the fixed cutter bar, of the adjusting cutter bar, a pressing groove is formed in the front end of the adjusting cutter bar, and an elastic spring is fixedly connected in the pressing groove. The tail end of the elastic spring is fixedly connected with a pressing block, a plurality of popping ports are formed in the front end of the fixed cutter bar, and the interiors of the pressing groove and the popping ports are slidably connected with the pressing block. According to the grooving cutter with the telescopic cutter bar, the use position of the cutter bar can be conveniently adjusted, so that the extension length of the cutter bar can be rapidly adjusted according to different machining requirements, the grooving cutter is suitable for machining grooves of various specifications, and frequent replacement of cutters or use of cutter bars of different sizes is not needed; groove machining tasks of various types and sizes can be completed on one device, the tool changing time is effectively saved, and the machining efficiency is improved.

The utility model discloses a kind of roll cutter replacement structures for maintenance machine tool, including horizontal milling machine, the main shaft of horizontal milling machine is equipped with detachable tool bar, roll cutter is equipped on the tool bar, movable tool bar seat is equipped on the tool bar, dismounting mechanism is equipped below the tool bar, the dismounting mechanism includes lifting assembly, workbench is equipped on the lifting assembly, the workbench is connected with the lifting assembly, base is equipped on the workbench, the base is hinged with the workbench, support assembly is equipped on the base, the support assembly is slid on the base, clamping mechanism is equipped on the support assembly. The utility model solves the problem of tediousness in the dismounting process of roll cutter of horizontal milling machine in the prior art.

The utility model provides a kind of machining center contact type mechanical tool changing structure, it is related to mechanical tool changing structure technical field, including stand mechanism, the front of the stand mechanism is equipped with main shaft box, the front of the stand mechanism is close to top end place, and punch arm mechanism is installed in the inside of main shaft box, the stand mechanism includes stand main body, the top end of the stand main body is equipped with motor with output end towards bottom, the front of the stand main body is close to top end place and is equipped with punch block, the inside of main shaft box is close to the front place and is equipped with main shaft body, the top end of the main shaft box is close to left side place and is screw-connected with first fastening screw, the periphery of the first fastening screw is equipped with tension spring, the top end of the main shaft box is close to the front place and is screw-connected with second fastening screw, mechanical quick tool changing can be realized, additional transmission device is not needed, with the advantages, such as quick tool changing efficiency, small size, cost saving.

The utility model provides a kind of cylinder seat processing device, comprising: bottom plate, the left and right sides of bottom plate are respectively equipped with left support seat and right support seat, positioning mounting plate is installed between left support seat and right support seat, the left and right ends of positioning mounting plate are respectively connected with left support seat and right support seat by swivel joint, first bevel gear is installed on the rotating shaft of swivel joint end, stepping motor is installed on right support seat, second bevel gear is installed on the output shaft of stepping motor, second bevel gear is engaged with the first bevel gear on swivel joint, a plurality of installation positioning hole groups are provided on positioning mounting plate and spaced apart side by side, positioning pin is correspondingly provided on each installation positioning hole group, and multiple cylinder seats are fixed on installation positioning hole group by positioning pin. The present cylinder seat processing device can realize the simultaneous processing of multiple cylinder seats, once clamping, and can complete the processing of multiple surfaces, thereby reducing the transfer and tool changing time, improving production efficiency and processing accuracy.

The present disclosure provides an automatic tool selection method and system for a blade disc flow channel, and relates to the technical field of computer-aided manufacturing. The method comprises the following steps: based on a three-dimensional geometric model corresponding to the blade disc, determining a hub spline curve and a casing spline curve corresponding to the flow channel, and performing parameterization processing on the two to obtain initial parameters; based on the initial parameters, performing iterative calculation on each hub feature point to obtain a depth range corresponding to the flow channel; based on the three-dimensional geometric model, determining a suction surface curve and a pressure surface curve corresponding to the flow channel; traversing each feature point in the suction surface curve, determining the nearest feature point corresponding to each feature point from the pressure surface curve based on an iterative search algorithm, and based on each feature point and the corresponding nearest feature point, determining a width range corresponding to the flow channel; and based on the depth range and the width range, determining a target tool corresponding to the flow channel. Through the above method, the machining precision and efficiency of the flow channel are improved.

The utility model provides a quick tool changing structure of a servo tool magazine, which comprises a rack and a servo motor, and the servo motor is mounted in the rack through a bolt; the output end of the servo motor is fixedly connected with a cutter head; the device is characterized in that the output end of the servo motor is connected with a base plate parallel to the cutter head through a bolt and located on the lower side of the cutter head; the outer side wall of the cutter head is connected with a plurality of cutter fixing assemblies through bolts. The tool fixing assembly comprises a clamping module for clamping a tool and a feeding module for jacking the tool upwards, and the clamping module and the feeding module can act at the same time. According to the tool changing speed, cooperation of all actions is achieved through driving of the air cylinder, the roller shaft jacks up the tool, the stroke is shortened, and the tool changing time is greatly shortened; the tool clamping reliability and stability are enhanced, the tool is firmly and evenly clamped through the clamping module design and the precise force transmission mechanism, the positioning precision is improved, and the requirements for high efficiency, high precision and high reliability of modern machining are met.

This utility model provides a horizontal machining center tool holder. The horizontal machining center tool holder includes a support frame, a rotating assembly fixedly connected to one side of the support frame, a fixed base fixedly connected to one side of the rotating assembly, a clamping assembly on the top of the fixed base, the top of the clamping assembly fixedly connected to the bottom of a mounting column, the inner wall of the mounting column slidably connected to the outer wall of a pressure column, the top of the pressure column fixedly connected to the bottom of a throttle, an arc-shaped groove on the outer wall of the mounting column, one end of a limiting column fixedly connected to the outer wall of the limiting column, the outer wall of the limiting column slidably connected to the inner wall of the arc-shaped groove, a limiting hole on the outer wall of the clamping assembly, the bottom outer wall of the pressure column slidably connected to the outer wall of the limiting hole, the bottom of the mounting column fixedly connected to the top of a second spring, and the inner wall of the second spring fixedly connected to the outer wall of the pressure column. The horizontal machining center tool holder provided by this utility model has the advantages of avoiding the cumbersome operation caused by traditional screw tightening and reducing tool change time.

The utility model relates to the technical field of turning tools, and provides a turning tool structure which comprises a main machine shell, one side of the main machine shell is rotationally connected with a rotating rod, one end of the rotating rod is fixedly connected with a rotating plate, and the outer surface of the rotating plate is fixedly connected with a plurality of connecting rods. The ends, away from the rotating plate, of the multiple connecting rods are fixedly connected with rotating rings, stress grooves are formed in the driving sides of the connecting rods and the rotating rings, force application rods are movably embedded in the stress grooves, one ends of the force application rods are fixedly connected with cranks, and the sides, away from the force application rods, of the cranks are fixedly connected with power rods. According to the utility model, the device is provided with an automatic rotating cutter replacing structure, so that a required cutter can be quickly and accurately switched to a working position, the cutter does not need to be manually replaced, the cutter replacing time is shortened, the production efficiency is improved, and a proper cutter can be flexibly selected and used according to different processing parts and process requirements; and diversified processing requirements are met.

This utility model provides an automatic tool changer for CNC milling machines, belonging to the field of CNC milling machine tool changing technology. It includes a frame, a sliding module mounted on the frame, and a CNC module mounted on the sliding module. It also includes a tool changing component mounted on the CNC module, with a detachable tool head inside; a bracket mounted on the frame, with a moving component mounted on the bracket, and a rotating component mounted on the moving component. The rotating component assists the tool changing component in changing the tool head. This utility model features a moving component and a rotating component. A servo motor can quickly drive the moving and rotating components, and an electric push rod can quickly clamp and release the tool head, greatly shortening the tool changing time, improving machine tool production efficiency, eliminating the need for manual tool changing by operators, and simultaneously improving safety during the production process.

The utility model relates to ultrasonic cutter technical field especially relates to a kind of ultrasonic wave disc cutter for processing honeycomb core material, including disc cutter body, the disc cutter body includes installation end and blade part, the installation end of the disc cutter body is optical axis structure, is installed on ultrasonic wave cutter handle by SK type structure or ER type structure or heat shrink clamping structure or other forms of jacket, the installation end of the disc cutter body adjustable, the installation end of the disc cutter body is reduced setting, the installation end diameter of the disc cutter body is not greater than the diameter of the convex portion of traditional disc cutter third, the blade part of the disc cutter body is equipped with abrasive structure, the abrasive structure includes the blade edge plane of 2mm axial length. This ultrasonic wave disc cutter not only can effectively protect workpiece, improve processing quality, and improve processing adaptability and range, ensure high-precision machining, also prolongs tool life, reduces use cost.

The utility model provides a kind of double mechanical hand double tool magazine automatic tool changing system, it includes: tool magazine module, it includes tool magazine support, the tool magazine component A and the tool magazine component B of identical structure being oppositely arranged on the tool magazine support, the tool magazine component A includes vertically arranged disc type tool magazine, rotation drive module for driving the circumferential rotation of the disc type tool magazine, the tool holder of a plurality of tool holders being arranged at the edge of the disc type tool magazine, the tool holder is used to store tool for spindle machining;Mechanical hand module, it includes the mechanical hand A and the mechanical hand B of identical structure being arranged at the both sides of the tool magazine module, the mechanical hand A and the mechanical hand B respectively drive tool to move to the tool magazine component A and tool magazine component B place and carry out tool changing. By the above-mentioned mode, the collaborative work of two groups of mechanical hands and two groups of disc type tool magazines, realize efficient, flexible tool changing operation, meet the demand of complex processing task.

The application discloses a kind of quick tool changer for slitting unit, it is related to longitudinal shearing machine tool changing technical field, including first rack and second rack, fixed roll and round knife roll are respectively arranged between the first rack and second rack, the circumferential outer wall of fixed roll is fixedly connected with the lower cutting disc of equidistant distribution, the circumferential outer wall of round knife roll is fixedly connected with the locking seat of equidistant distribution, the side of locking seat is fixedly connected with tool seat.In the application, accurate positioning is realized by mechanical transmission, without manual adjustment of butt joint position, which ensures the coaxiality of new cutting tool assembly and driving assembly, avoids power transmission deviation during cutting, further shortens the restart time after tool changing, ensures that the device can quickly recover efficient production, and the mechanical interlocking connection mode continuously ensures the stability during cutting process, avoids the skew or displacement of new tool due to fixing problem.

This utility model relates to the field of cutting tool technology, and more particularly to a ball-end multi-functional end mill, comprising a shank and a cutter body. The cutter body is fixedly connected to the end of the shank, and a spherical tool holder is fixedly connected to the top of the cutter body. A spherical cutting insert is mounted on the spherical tool holder. A linear tool holder is provided on the cutter body, and a linear cutting insert is mounted on the linear tool holder. The linear tool holder includes multiple teeth spirally distributed along the outer circumference of the cutter body, and at least two chip removal grooves are spirally extended along the outer circumference of the cutter body surface. The cross-section of the chip removal groove is U-shaped, and the groove depth gradually increases from the top to the bottom of the cutter body. This utility model solves the problems of low efficiency, complex operation, and easy error caused by traditional multi-tool switching methods in the machining process.

The utility model discloses a kind of tool changing assembly and die-cutting machine, including positioning plate, its bottom is provided with fixedly connected with two groups of fixed plate, two groups The fixed plate between reservation has installation cavity, the inside of the installation cavity is inserted with tool, for the clamping assembly that tool is quickly positioned in installation cavity inside, The clamping assembly includes fixed shell, sliding block, spring and pull rod, by setting the two groups of fixed plate of positioning plate bottom and installation cavity, accurate installation space is provided for tool, cooperation clamping assembly realizes quick positioning installation, tool fixing can be completed by operating clamping assembly, tool changing time is greatly shortened, production efficiency is significantly improved, clamping assembly adopts the combination design of fixed shell, sliding block, spring and pull rod, structure is simple and clear, without the aid of multiple complex tools, without operating personnel have high skill level, tool installation and disassembly can be easily completed, it is favorable to reduce the skill requirement to operating personnel.

The utility model relates to the technical field of planing and sanding machine, disclose a novel tool changing structure of planing and sanding machine, include: machine frame includes left side seat and right side seat, the upper end surface of left side seat is fixed with more than one slider, the upper end surface of right side seat is fixed with more than one slider, the upper cover plate is installed between left side seat and right side seat, the both sides of upper cover plate are equipped with the guide rail of cooperation with slider respectively, the both sides of upper cover plate are installed rotatable gyro wheel respectively, upper cover plate is equipped with bearing support on the front and back position, the front end and rear end of cutting main shaft are connected with bearing support respectively, the even setting planer blade is installed on cutting main shaft, the upper cover plate can be pulled relative to frame to replace the planer blade on cutting main shaft, the utility model discloses the extraction mode is convenient for planer blade replacement, and four -legged stand support increases structural stability.

The utility model relates to mechanical processing technical field, concretely is a kind of universal angle lathe tool extension tool holder, including fixed seat and adjusting base, fixed seat is by the lathe tool holder connecting portion for being connected with lathe tool holder and the adjusting base connecting portion for being connected with adjusting base is composed, adjusting base is rotatably installed on adjusting base connecting portion, rotating drive device for driving adjusting base to rotate to adjust angle and locking device for locking adjusting base on adjusting base connecting portion after adjusting angle are provided on adjusting base connecting portion, lathe tool is fixedly installed in the bottom of adjusting base. The universal angle lathe tool extension tool holder effectively solves the problem of traditional lathe tool holder in angle adjustment efficiency, angle adjustment accuracy, stability, convenience and universality etc., provides powerful support for the high-precision, high-efficiency processing of complex parts in new energy automobile, aerospace and other fields.

The utility model relates to the technical field of optical fiber processing equipment, in particular to an optical fiber cut-off machine with a cutter convenient to replace, which comprises a base and a mounting back plate, and an optical fiber fixing seat is arranged on the base; a first sliding plate and a driving device are arranged on the mounting back plate; the driving device is used for driving the first sliding plate to slide in the height direction of the mounting back plate; a second sliding plate is arranged on the first sliding plate and can move in the length direction of the first sliding plate; the second sliding plate is further provided with a cutter clamp used for clamping a cutter. The base is further provided with a tool changing seat, and the tool changing seat is located in the sliding path range of the second sliding plate so that the second sliding plate can drive the cutter clamp to move to the tool changing seat to replace the cutter. When the cutter needs to be replaced, the cutter clamp on the second sliding plate can be moved to the cutter replacing seat by sliding the second sliding plate; when the cutter is replaced, the cutter can be quickly replaced only by operating the cutter clamp to relieve the clamping of the old cutter and clamping the new cutter again after the new cutter is placed, so that the working efficiency is improved.

The utility model discloses a multi-step expanding and reaming integrated composite cutter which comprises a handle portion, a reamer section and an expanding cutter section are sequentially arranged at the working end of the handle portion, the longitudinal section of a cutting edge of the expanding cutter section is in a step shape, the diameter of each layer of cutting edge is gradually increased from top to bottom, and the handle portion, the reamer section and the expanding cutter section jointly form an expanding cutter body. An end part cutting edge is arranged at the end part of the working end of the expanding reamer body, and a chip groove is formed in the working end of the outer wall of the expanding reamer body. The problem that long-strip-shaped and large-sheet-shaped metal chippings are generated during metal machining of an inner cavity of an existing part is solved.

The utility model relates to the technical field of vertical turning, and discloses a quick-change turning tool apron for vertical turning, which comprises a turning turntable, a workpiece to be machined is fixedly arranged above the turning turntable, a turning tool apron is arranged above the workpiece to be machined, a turning tool apron positioning plate is fixedly arranged above the turning tool apron, and the turning tool apron positioning plate is fixedly arranged above the turning turntable. A ram spindle unit is arranged above the turning tool apron positioning plate, the turning tool apron is tensioned by the ram spindle unit through a standard tool handle, and a limiting block is arranged on the turning tool apron. According to the quick-change turning tool apron for vertical turning, the tool magazine and the tool changing mechanism are arranged, so that the turning tool apron can be pre-installed in the tool magazine in advance, the mode that a traditional turning tool needs to be manually installed and adjusted is changed, the use convenience of the turning tool is greatly improved, and in the actual machining process, when the turning tool needs to be replaced, the turning tool can be conveniently replaced. Manual tedious installation is not needed, the turning tool base with the pre-installed tool is taken from the tool magazine directly through the tool changing mechanism, and a large amount of tool changing time is saved.

The utility model relates to a drum-type tool magazine and an engraving and milling machine. The drum type tool magazine comprises a tool magazine body, a tool handle fixing mechanism, a first driving mechanism and a second driving mechanism, a drum cutter head assembly is rotationally connected to the tool magazine body along a preset axis, and a plurality of tool positions are arranged on the drum cutter head assembly and used for loading tool handles; the cutter handle fixing mechanism is arranged at the cutter position and used for fixing the cutter handle loaded at the cutter position; the first driving mechanism is in driving connection with the tool magazine body and drives the tool magazine body to move in the first direction; the preset axis intersects with the first direction; the second driving mechanism is in driving connection with the roller cutter head assembly and drives the roller cutter head assembly to rotate along the preset axis. According to the drum type tool magazine, by increasing the number of the tool bits, the capacity is increased, by means of cooperation of the dual-drive mechanism, the tools can be rapidly positioned and exchanged, the tool changing time is shortened, the machining efficiency is improved, and the tool changing requirement of complex parts is met.

The utility model discloses a drilling device with a drill bit convenient to replace, and particularly relates to the field of drilling equipment.The drilling device comprises a fixing block and the drill bit, a clamping groove is formed in the bottom end of the fixing block, two sliding grooves are symmetrically formed in the outer wall of the fixing block, each sliding groove is internally connected with a connecting block in a sliding mode, and the connecting blocks are arranged in the clamping grooves. A limiting hole is formed in the upper end face of each connecting block, a mounting groove is formed in the inner top wall of each sliding groove, a limiting device is arranged in each mounting groove, and the output end of each limiting device is connected with the corresponding two limiting holes. By arranging the limiting device, the fixing plate, the push rod and other devices, unlocking and locking of the drill bit can be rapidly completed through simple operation of lifting the handle and pulling the push-pull rod, compared with a traditional mode that the drill bit needs to be disassembled and assembled with the help of a tool, the tool changing time is greatly shortened, the waiting process is reduced, and in the working scene that the drill bit is frequently replaced, the working efficiency is greatly improved. And the overall working efficiency can be effectively improved.

The utility model discloses an integrated tool of air suction cover relates to tool fixing technical field, including bottom plate, is equipped with a plurality of positioning hole groups on the bottom plate, and the corresponding positioning block group is installed on the positioning hole group, and the positioning block group sets up below the air suction cover, and the positioning block is connected through connecting rod and pressing plate, and the pressing plate one end sets up above the air suction cover, and the outer end of positioning block and pressing plate is connected with the top rod, the utility model discloses is suitable for all kinds of air suction cover, has reduced the design various tool costs, has reduced the tool time of replacing, has improved the clamping efficiency.

The utility model relates to the technical field of flange machining, in particular to a speed reducer flange machining die which comprises a base, a hydraulic rod is fixedly installed on the surface of the base, a clamping threaded rod, a corner threaded rod, a lifting threaded rod and a die holder are arranged, by means of the synergistic effect of the structures, the clamping threaded rod can synchronously drive clamping seats A and B which are symmetrically distributed, and the clamping seats A and B can be synchronously driven by the hydraulic rod. The rapid centering and uniform clamping of the flange are achieved, deformation caused by uneven stress is avoided, a corner motor accurately controls synchronous rotation of the clamping plates A and B, the flange is flexibly adjusted according to a preset angle, the multi-angle machining requirements of inclined planes, beveled edges and the like are met, a lifting threaded rod is matched with a lifting sliding rod, a die holder is driven to symmetrically ascend and descend, and the flange centering and clamping device can adapt to clamping of flanges of different heights and can also adapt to clamping of the flanges of different heights. And the machining height can be dynamically adjusted when the flange rotates, it is ensured that the cutter and the workpiece are kept at the optimal cutting position, the device is suitable for production of multi-specification and high-precision speed reducer flanges, and a solution is provided for efficient machining of complex workpieces.

The application discloses an oil cylinder body boring device and belongs to the technical field of oil cylinder body machining. The device comprises a machine body and a fixed head. The inner and outer sides of the fixed head are provided with adjusting components. The adjusting components comprise an electric push rod fixedly connected to the inner side of the fixed head. The telescopic end of the electric push rod is fixedly connected with a pushing column. The lower side of the outer surface of the pushing column is provided with a first groove arranged in a ring array. The upper side of the outer surface of the pushing column is provided with a second groove arranged in a ring array. The pushing column is pushed by the electric push rod to realize the quick switching of the first boring tool and the second boring tool in cooperation with the first groove and the second groove. Since the first grooves and the second grooves are arranged in an up-and-down staggered manner, the electric push rod can only retract or extend the first boring tool or the second boring tool each time, the quick switching of rough boring and fine boring is realized, the tool changing time is greatly shortened without manual tool changing, and the boring efficiency of the cylinder body is ensured.

This utility model discloses a crossbeam vertical turning and milling integrated CNC machine tool, including a worktable, a clamping device, a turning and milling device, and a tool changing device. The clamping device has a first spindle mechanism that can rotate around the Z-axis and a Y-axis motion mechanism; the turning and milling device includes a second spindle mechanism that can mount turning tools or milling cutters, a third spindle mechanism that oscillates around the Y-axis, and Z-axis and X-axis motion mechanisms; the tool changing device includes a tool magazine and a tool changing assembly. This machine tool, through optimized structural layout, enables multi-process machining of workpieces in a single clamping. The first spindle mechanism, combined with Y-axis motion, ensures workpiece positioning accuracy, while the second spindle mechanism, in conjunction with multi-degree-of-freedom motion, completes the machining of complex curved surfaces. The tool changing device enables rapid tool switching. A particularly noteworthy feature is the L-shaped worktable design, with the Y-axis mechanism located at the top and the X-axis mechanism at the bottom, enhancing the machine tool's rigidity and stability. This utility model has a compact structure, high machining accuracy, and is suitable for efficient composite machining of complex parts in fields such as automotive manufacturing.

The utility model discloses a boring and milling machine's standpost rotation accurate positioning device relates to boring and milling machine technical field, including chassis, the chassis top one side fixedly connected with the cushion block, be provided with the installation bin in the cushion block. This boring and milling machine's standpost rotation accurate positioning device, this device passes through two -stage adjusting mechanism and significantly improved the precision and stability of standpost rotation positioning, and the primary regulation is by the self -locking motor drive adjusting gear rotation, drives the carousel and the worm rotation, realizes the substantial rotation adjustment of support disc through the meshing of worm and worm wheel, and the secondary regulation is by servo motor direct drive worm, utilizes the characteristics of worm gear drive ratio amplification torque, and the fine correction of small angle is carried out to support disc, because worm gear drive has self -locking, and the worm wheel position is locked after adjusting, avoids the rotation deviation caused by load fluctuation or external interference, guarantees the accuracy of positioning, and also has promoted the stability of device in the processing process.

The utility model discloses a lathe saddle which comprises a base and a clamping portion, the clamping portion is arranged at the top of the base and provided with a clamping frame which is vertically arranged at the top of the base in a sliding mode and used for clamping a tool, a sliding block is transversely arranged in the base in a sliding mode, and the sliding block is connected with the clamping frame in a clamping mode. The sliding block moves to fix the position of the clamping frame, a transmission rod is vertically arranged on the top of the base in a sliding mode, the transmission rod is connected with the sliding block in a sliding mode, and the transmission rod moves to drive the sliding block to move. By arranging the clamping parts, the sliding block can be driven to transversely move through vertical movement of the transmission rod, so that the sliding block and the clamping frame are clamped or separated, rapid clamping or loosening of a cutter is achieved, cutter changing efficiency is improved, double cutter position switching is achieved through the symmetrically-arranged clamping parts, machining flexibility is improved, cutter changing time is shortened, and machining efficiency is improved. The device is suitable for multi-procedure continuous machining.

The utility model relates to a multi-step inner hole processing boring cutter, which comprises a boring bar main body formed by a plurality of stepped shafts with gradually increased shaft diameters, cutter mounting positions are respectively arranged in the circumferential direction of the initial end of each shaft section except a first shaft section on the boring bar main body, and two cutters which are symmetrically distributed at 180 degrees are arranged on each cutter mounting position. According to the boring cutter, the coaxiality error of a multi-step hole system can be controlled within + / -0.05 mm, the machining efficiency is remarkably improved, and the boring cutter is particularly suitable for the field of manufacturing of high-end parts such as petroleum instrument shells which have strict requirements for coaxiality and surface integrity.