CN103862355B - Polishing machine - Google Patents

Polishing machine Download PDF

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Publication number
CN103862355B
CN103862355B CN201410120338.0A CN201410120338A CN103862355B CN 103862355 B CN103862355 B CN 103862355B CN 201410120338 A CN201410120338 A CN 201410120338A CN 103862355 B CN103862355 B CN 103862355B
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CN
China
Prior art keywords
axis
axle
polishing
shaft
blade
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201410120338.0A
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Chinese (zh)
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CN103862355A (en
Inventor
史耀耀
李婕
段继豪
何晓东
张军锋
赵涛
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Northwestern Polytechnical University
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Northwestern Polytechnical University
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Publication date
Application filed by Northwestern Polytechnical University filed Critical Northwestern Polytechnical University
Priority to CN201410120338.0A priority Critical patent/CN103862355B/en
Publication of CN103862355A publication Critical patent/CN103862355A/en
Application granted granted Critical
Publication of CN103862355B publication Critical patent/CN103862355B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00Other grinding machines or devices
    • B24B27/0076Other grinding machines or devices grinding machines comprising two or more grinding tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00Component parts such as frames, beds, carriages, headstocks
    • B24B41/06Work supports, e.g. adjustable steadies
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The invention discloses a kind of polishing machine, for solving the little technical problem of the existing five-coordinate self-adaption leaf blade polishing machine scope of application.Technical scheme is that this polishing machine entirety adopts planer type structure, and comprise abrasive belt mechanism, flexible bistrique, linear axis, swinging axle and rotating shaft, variable-frequency motor drives abrasive band motion on abrasive belt mechanism.C Shaft and NC Machining Test turntable is used for clamping leaf dish, carries out numerical control polishing by flexible bistrique to blisk.U Shaft and NC Machining Test turntable is used for clamping blade, replaces the swing of A axle when using abrasive band polishing.By abrasive belt mechanism, polishing is carried out to blade profile, by flexible bistrique, polishing is carried out to blade intake and exhaust limit, damping platform and root of blade.Can mutually switch between abrasive belt mechanism and flexible bistrique two working cells.Because abrasive belt mechanism and flexible bistrique two working cells can switch mutually, not only can carry out polishing to blisk, can also carry out polishing to blade profile, blade intake and exhaust limit, damping platform and root of blade, the scope of application is large.

Description

Polishing machine
Technical field
The present invention relates to a kind of polishing machine, for the polishing of blisk and blade.
Background technology
With reference to Fig. 5.Document " Authorization Notice No. is the Chinese invention patent of CN100544891C " discloses a kind of five-coordinate self-adaption leaf blade polishing machine, and this polishing machine comprises motor Q1, cabinet equipment Q2, shaft coupling Q3, crank driving mechanism Q5, displacement variable eccentric Q6, oscillating bearing and motion guide-bar mechanism Q7, blade fixture Q8, grinding tool and motion Q9.Motor Q1 passes to crank driving mechanism Q5 by shaft coupling Q3, change circular motion into straight-line oscillation, the oscillating bearing in oscillating bearing and motion guide-bar mechanism Q7 drives and moves back and forth guide-bar mechanism and vibrational energy is passed to the blade clamped by blade fixture Q8.Other parts are all directly installed or are indirectly connected on equipment cabinets Q2, and grinding tool and motion Q9 and blade fixture Q8 realize the polishing operation to polished blade by interoperation.This invention is strong to the dependence of mould, can easily not realize the polishing of different size shape blade.And this invention is only applicable to the blade polishing of blade, the polishing on blade damping platform and root thereof, intake and exhaust limit cannot be realized, more cannot realize the polishing to blisk.
Summary of the invention
In order to overcome the little deficiency of the existing five-coordinate self-adaption leaf blade polishing machine scope of application, the invention provides a kind of polishing machine.This polishing machine entirety adopts planer type structure, comprises abrasive belt mechanism, flexible bistrique, linear axis, swinging axle and rotating shaft, and variable-frequency motor drives abrasive band motion on abrasive belt mechanism.C Shaft and NC Machining Test turntable is used for clamping leaf dish, carries out numerical control polishing by flexible bistrique to blisk.U Shaft and NC Machining Test turntable is used for clamping blade, replaces the swing of A axle when using abrasive band polishing.By abrasive belt mechanism, polishing is carried out to blade profile, by flexible bistrique, polishing is carried out to blade intake and exhaust limit, damping platform and root of blade.Can mutually switch between abrasive belt mechanism and flexible bistrique two working cells.Because abrasive belt mechanism and flexible bistrique two working cells can switch mutually, not only can carry out polishing to blisk, can also carry out polishing to blade profile, blade intake and exhaust limit, damping platform and root of blade, the scope of application is large.
The technical solution adopted for the present invention to solve the technical problems is: a kind of polishing machine, is characterized in comprising Z axis motor 1, drag chain 2, main spindle box 3, X-axis motor 4, B spindle motor 5, variable-frequency motor 6, abrasive belt mechanism 7, A spindle motor 8, flexible bistrique 9, U Shaft and NC Machining Test turntable 10, C Shaft and NC Machining Test turntable 11, Y-axis protective cover 12, base 13 and y-axis motor 14.Also comprise linear axis, swinging axle and rotating shaft, linear axis has X-axis, Y-axis and Z axis, and swinging axle has A axle and B axle, and rotating shaft has C axle and U axle.X-axis, Y-axis and Z axis all adopt screw nut driven mode, X-axis is for realizing the rectilinear motion of main spindle box 3 along crossbeam direction, Y-axis is for realizing the rectilinear movement of C Shaft and NC Machining Test turntable 11 along base 13 direction, and Z axis is for realizing main spindle box 3 rectilinear motion vertically.X-axis motor 4, y-axis motor 14, Z axis motor 1 are respectively used to the motion controlling lathe X, Y, Z-direction, and A spindle motor 8 drives flexible bistrique 9 to swing along A direction of principal axis, and A axle accurately controls pendulum angle with electromagnetic brake.B spindle motor 5 drives abrasive belt mechanism 7 to swing along B direction of principal axis.Variable-frequency motor 6 drives abrasive band motion on abrasive belt mechanism 7.C Shaft and NC Machining Test turntable 11 adopts servomotor, for clamping leaf dish, carries out numerical control polishing by flexible bistrique 9 pairs of blisks.U Shaft and NC Machining Test turntable 10 adopts servomotor, for clamping blade, replaces the swing of A axle when using abrasive band polishing.Carry out polishing by abrasive belt mechanism 7 pairs of blade profiles, carry out polishing by flexible bistrique 9 pairs of blade intake and exhaust limits, damping platform and roots.Drag chain 2 is for the protection of the wire be connected on A axle and flexible bistrique 9.Y-axis protective cover 12 is for the protection of Y-axis guide rail and leading screw.Abrasive belt mechanism 7 is connected to lathe headstock 3 by rail plate plate, can mutually switch between abrasive belt mechanism 7 and flexible bistrique 9 two working cells.Polishing machine entirety adopts planer type structure, and base 13 is for support table.
Described flexible bistrique 9 comprises rear end cap 15, spindle jacket 16, cylinder top cover 17, left half axle 18, sensor 19, right axle shaft 20, cylinder 21, protective cover 22 and electro spindle 23.Left half axle 18 and right axle shaft 20 are support gyroaxises that flexible bistrique 9 realizes swinging, and realize lathe A axle and move, left half axle 18, right axle shaft 20 are fixedly connected with spindle jacket 16, and by the center of gravity of whole mechanism.Sensor 19 is placed in the opposite of cylinder 21, for detecting the power suffered by electro spindle 23 radial direction.Rear end cap 15 and spindle jacket 16, for supporting electric main shaft 23, are fixed with cylinder top cover 17 simultaneously, are made cylinder 21 can carry out stretching motion in axis and radial direction, make electro spindle 23 realize micrometric displacement motion.Protective cover 22 is fixedly connected with ring flange.
Described abrasive belt mechanism 7 comprises compliant mechanism 24, guide rail 25, driving cylinder 26, deviation correction mechanism 27, large Castor 28, contact wheel 29, tensioning cylinder 30 and driving wheel 31.Drive the reach of cylinder 26 piston rod, drive compliant mechanism 24 and contact wheel 29 to move.Cylinder 26 is driven to adopt two proportioning valve to carry out double-direction control.Compliant mechanism 24 is arranged on the guide rail 25 of base plate, and the width of compliant mechanism 24 is less than the width of guide rail 25 groove, facilitates compliant mechanism 24 to move nimbly and freely.By the pose adjustment driving cylinder 26 micrometric displacement to realize contact wheel 29.Compliant mechanism 24 makes running roller, contact wheel 29 and abrasive band realize being synchronized with the movement, and is symmetrical structure.Deviation correction mechanism 27 is made up of running roller, correction adjusting rod, knob, rectifies a deviation for the manual sideslip to abrasive band.Tensioning cylinder 30 is for controlling the size of tensile force.Driving wheel 31 is in waist drum shape, and large Castor 28 is for strengthening the cornerite of abrasive band on contact wheel 29.
Described A spindle motor 8 is servomotor.
Described B spindle motor 5 is servomotor.
The invention has the beneficial effects as follows: this polishing machine entirety adopts planer type structure, comprises abrasive belt mechanism, flexible bistrique, linear axis, swinging axle and rotating shaft, variable-frequency motor drives abrasive band motion on abrasive belt mechanism.C Shaft and NC Machining Test turntable is used for clamping leaf dish, carries out numerical control polishing by flexible bistrique to blisk.U Shaft and NC Machining Test turntable is used for clamping blade, replaces the swing of A axle when using abrasive band polishing.By abrasive belt mechanism, polishing is carried out to blade profile, by flexible bistrique, polishing is carried out to blade intake and exhaust limit, damping platform and root of blade.Can mutually switch between abrasive belt mechanism and flexible bistrique two working cells.Because abrasive belt mechanism and flexible bistrique two working cells can switch mutually, not only can carry out polishing to blisk, can also carry out polishing to blade profile, blade intake and exhaust limit, damping platform and root of blade, the scope of application is large.
Below in conjunction with the drawings and specific embodiments, the present invention is elaborated.
Accompanying drawing explanation
Fig. 1 is polishing machine general structure stereogram of the present invention.
Fig. 2 is the structural representation of flexible bistrique in Fig. 1.
Fig. 3 is the coordinate system schematic diagram of polishing machine of the present invention.
Fig. 4 is the structural representation of abrasive belt mechanism in Fig. 1.
Fig. 5 is background technology five-coordinate self-adaption leaf blade polishing machine structural representation.
In figure, 1-Z spindle motor; 2-drag chain; 3-main spindle box; 4-X spindle motor; 5-B spindle motor; 6-variable-frequency motor; 7-abrasive belt mechanism; 8-A spindle motor; The flexible bistrique of 9-; 10-U Shaft and NC Machining Test turntable; 11-C Shaft and NC Machining Test turntable; 12-Y axle protective cover; 13-base; 14-Y spindle motor; 15-rear end cap; 16-spindle jacket; 17-cylinder top cover; 18-left half axle; 19-sensor; 20-right axle shaft; 21-cylinder; 22-protective cover; 23-electro spindle; 24-compliant mechanism; 25-guide rail; 26-drives cylinder; 27-deviation correction mechanism; The large Castor of 28-; 29-contact wheel; 30-tensioning cylinder; 31-driving wheel.
Detailed description of the invention
Following examples are with reference to Fig. 1-4.
Polishing machine of the present invention is for realizing the numerical control polishing of blisk and blade.Polishing machine comprises Z axis motor 1, drag chain 2, main spindle box 3, X-axis motor 4, B spindle motor 5, variable-frequency motor 6, abrasive belt mechanism 7, A spindle motor 8, flexible bistrique 9, U Shaft and NC Machining Test turntable 10, C Shaft and NC Machining Test turntable 11, Y-axis protective cover 12, base 13 and y-axis motor 14.Also comprise linear axis, swinging axle and rotating shaft, linear axis has X-axis, Y-axis and Z axis, and swinging axle has A axle and B axle, and rotating shaft has C axle and U axle.X-axis, Y-axis and Z axis all adopt the kind of drive of feed screw nut, X-axis is for realizing the rectilinear motion of main spindle box 3 along crossbeam direction, Y-axis is for realizing the rectilinear movement of C Shaft and NC Machining Test turntable 11 along base 13 direction, and Z axis is for realizing main spindle box 3 rectilinear motion vertically.X-axis motor 4, y-axis motor 14, Z axis motor 1 are respectively used to the motion controlling lathe X, Y, Z-direction, thus carry out the Set and Positioning of different size impeller blade.A spindle motor 8 is servomotor, for realizing flexible bistrique 9 along the axial swing of A, A axle accurately controls pendulum angle with electromagnetic brake.B spindle motor 5 is servomotor, for driving abrasive belt mechanism 7 along the axial swing of B.Variable-frequency motor 6, for driving the motion in abrasive band on abrasive belt mechanism 7, can regulate abrasive band linear velocity.C Shaft and NC Machining Test turntable 11 adopts servomotor accurately to control, and realizes rotating freely motion, carry out numerical control polishing by flexible bistrique 9 pairs of blisks for clamping leaf dish.U Shaft and NC Machining Test turntable 10 adopts servomotor accurately to control, and realizes rotating freely motion for clamping blade, is mainly used in the swing replacing A axle when using abrasive band polishing.Carry out polishing by abrasive belt mechanism 7 pairs of blade profiles (blade back and leaf basin), carry out polishing by flexible bistrique 9 pairs of blade intake and exhaust limits, damping platform and roots.Drag chain 2 is for the protection of the wire being connected to A axle and flexible bistrique 9.Y-axis protective cover 12 is for the protection of Y-axis guide rail and leading screw.Base 13 support table.Abrasive belt mechanism 7 is connected to lathe headstock 3 by rail plate plate, realizes the rapid switching between abrasive belt mechanism 7 and flexible bistrique 9 two working cells by automatic control mode.Adopt planer type structure.
Described flexible bistrique 9 comprises rear end cap 15, spindle jacket 16, cylinder top cover 17, left half axle 18, sensor 19, right axle shaft 20, cylinder 21, protective cover 22 and electro spindle 23.Left half axle 18 and right axle shaft 20 are support gyroaxises that flexible bistrique 9 realizes swinging, and realize lathe A axle and move, left half axle 18, right axle shaft 20 are fixedly connected with spindle jacket 16, and by the center of gravity of whole mechanism.Sensor 19 is placed in the opposite of cylinder 21, for detecting the power suffered by electro spindle 23 radial direction.Rear end cap 15 and spindle jacket 16, for supporting electric main shaft 23, are fixed with cylinder top cover 17 simultaneously, are made cylinder 21 can carry out stretching motion in axis and radial direction, thus make electro spindle 23 realize micrometric displacement motion, reach flexible effect.Protective cover 22 is fixedly connected with ring flange, for preventing dust, greasy dirt, chip access mechanism.
Described abrasive belt mechanism 7 comprises compliant mechanism 24, guide rail 25, driving cylinder 26, deviation correction mechanism 27, large Castor 28, contact wheel 29, tensioning cylinder 30 and driving wheel 31.During polishing, drive the reach of cylinder 26 piston rod, drive compliant mechanism 24 and contact wheel 29 to move.Cylinder 26 is driven to carry out two-way ventilation, double-direction control by two proportioning valve.Compliant mechanism 24 is arranged on the guide rail 25 of base plate, and the width of compliant mechanism 24 is less than the width of guide rail 25 groove, facilitates compliant mechanism 24 motion nimbly and freely.By the pose adjustment driving cylinder 26 micrometric displacement to realize contact wheel 29, polishing process is made to have followability.Compliant mechanism 24 makes running roller, contact wheel 29 and abrasive band realize being synchronized with the movement, and is symmetrical structure.Deviation correction mechanism 27 is made up of running roller, correction adjusting rod, knob, rectifies a deviation for the manual sideslip to abrasive band.Tensioning cylinder 30 is for controlling the size of tensile force, and when the throughput of cylinder increases, the displacement of protracting of piston axle is more, and the tensile force in abrasive band increases, otherwise the tensile force in abrasive band is less, and cylinder throughput is by control ratio valve regulation.Driving wheel 31 Xray films has a certain amount of convexity value, namely becomes waist drum shape, ensures to operate steadily in abrasive band, sideslip does not occur.Large Castor 28, for strengthening the cornerite of abrasive band on contact wheel 29, prevents from occurring skidding in polishing process, improves the stability of pressure control structure.

Claims (5)

1. a polishing machine, is characterized in that comprising Z axis motor (1), drag chain (2), main spindle box (3), X-axis motor (4), B spindle motor (5), variable-frequency motor (6), abrasive belt mechanism (7), A spindle motor (8), flexible bistrique (9), U Shaft and NC Machining Test turntable (10), C Shaft and NC Machining Test turntable (11), Y-axis protective cover (12), base (13) and y-axis motor (14); Also comprise linear axis, swinging axle and rotating shaft, linear axis has X-axis, Y-axis and Z axis, and swinging axle has A axle and B axle, and rotating shaft has C axle and U axle; X-axis, Y-axis and Z axis all adopt screw nut driven mode, X-axis is used for realizing the rectilinear motion of main spindle box (3) along crossbeam direction, Y-axis is used for realizing the rectilinear movement of C Shaft and NC Machining Test turntable (11) along base (13) direction, and Z axis is used for realizing main spindle box (3) rectilinear motion vertically; X-axis motor (4), y-axis motor (14), Z axis motor (1) are respectively used to the motion controlling lathe X, Y, Z-direction, A spindle motor (8) drives flexible bistrique (9) to swing along A direction of principal axis, and A axle accurately controls pendulum angle with electromagnetic brake; B spindle motor (5) drives abrasive belt mechanism (7) to swing along B direction of principal axis; Variable-frequency motor (6) drives abrasive belt mechanism (7) upper abrasive band motion; C Shaft and NC Machining Test turntable (11) adopts servomotor, for clamping leaf dish, carries out numerical control polishing by flexible bistrique (9) to blisk; U Shaft and NC Machining Test turntable (10) adopts servomotor, for clamping blade, replaces the swing of A axle when using abrasive band polishing; By abrasive belt mechanism (7), polishing is carried out to blade profile, by flexible bistrique (9), polishing is carried out to blade intake and exhaust limit, damping platform and root; Drag chain (2) is for the protection of the wire be connected on A axle and flexible bistrique (9); Y-axis protective cover (12) is for the protection of Y-axis guide rail and leading screw; Abrasive belt mechanism (7) is connected to lathe headstock (3) by rail plate plate, can mutually switch between abrasive belt mechanism (7) and flexible bistrique (9) two working cells; Polishing machine entirety adopts planer type structure, and base (13) is for support table.
2. polishing machine according to claim 1, is characterized in that: described flexible bistrique (9) comprises rear end cap (15), spindle jacket (16), cylinder top cover (17), left half axle (18), sensor (19), right axle shaft (20), cylinder (21), protective cover (22) and electro spindle (23); Left half axle (18) and right axle shaft (20) are the support gyroaxises that flexible bistrique (9) realizes swinging, realize the motion of lathe A axle, left half axle (18), right axle shaft (20) are fixedly connected with spindle jacket (16), and by the center of gravity of whole mechanism; Sensor (19) is placed in the opposite of cylinder (21), for detecting the power suffered by electro spindle (23) radial direction; Rear end cap (15) and spindle jacket (16) are for supporting electric main shaft (23), fix with cylinder top cover (17) simultaneously, make cylinder (21) stretching motion can be carried out in axis and radial direction, make electro spindle (23) realize micrometric displacement motion; Protective cover (22) is fixedly connected with ring flange.
3. polishing machine according to claim 1, is characterized in that: described abrasive belt mechanism (7) comprises compliant mechanism (24), guide rail (25), driving cylinder (26), deviation correction mechanism (27), large Castor (28), contact wheel (29), tensioning cylinder (30) and driving wheel (31); Drive the reach of cylinder (26) piston rod, drive compliant mechanism (24) and contact wheel (29) motion; Cylinder (26) is driven to adopt two proportioning valve to carry out double-direction control; Compliant mechanism (24) is arranged on the guide rail (25) of base plate, and the width of compliant mechanism (24) is less than the width of guide rail (25) groove; By the pose adjustment driving cylinder (26) micrometric displacement to realize contact wheel (29); Compliant mechanism (24) makes running roller, contact wheel (29) and abrasive band realize being synchronized with the movement, and is symmetrical structure; Deviation correction mechanism (27) is made up of running roller, correction adjusting rod, knob, rectifies a deviation for the manual sideslip to abrasive band; Tensioning cylinder (30) is for controlling the size of tensile force; Driving wheel (31) is in waist drum shape, and large Castor (28) is for strengthening the cornerite of abrasive band on contact wheel (29).
4. polishing machine according to claim 1, is characterized in that: described A spindle motor (8) is servomotor.
5. polishing machine according to claim 1, is characterized in that: described B spindle motor (5) is servomotor.
CN201410120338.0A 2014-03-27 2014-03-27 Polishing machine Expired - Fee Related CN103862355B (en)

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Application Number Priority Date Filing Date Title
CN201410120338.0A CN103862355B (en) 2014-03-27 2014-03-27 Polishing machine

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Application Number Priority Date Filing Date Title
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CN103862355B true CN103862355B (en) 2016-01-20

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CN104625894A (en) * 2015-03-10 2015-05-20 拉威尔(北京)科技有限公司 Numerical control tool machining grinder with four-axis linkage replacing five-axis linkage
CN106271986A (en) * 2015-05-25 2017-01-04 天津世创机械制造有限公司 A kind of novel plane sanding and polishing machine
CN105171565B (en) * 2015-10-20 2017-10-20 南京宁庆数控机床制造有限公司 Portable aircraft engine blade grinding machine
CN105563300A (en) * 2016-01-08 2016-05-11 湖南大学 Rotary elastomer and grinding-polishing equipment
CN105643428A (en) * 2016-01-08 2016-06-08 湖南大学 Grinding and polishing method using revolving elastomer
CN105922036B (en) * 2016-06-30 2018-04-13 何淑琼 The valve deck transposer of solenoid valve valve deck process equipment
CN106002402B (en) * 2016-06-30 2018-06-15 江苏射阳港港口股份有限公司 First valve deck inversion mechanism of solenoid valve valve deck process equipment
CN106625113A (en) * 2016-11-07 2017-05-10 佛山市顺德区新大陆机械制造有限公司 Plastic plate periphery polishing machine
CN106695525A (en) * 2017-01-05 2017-05-24 周挺娜 Steel plate plane treatment device
CN110216558A (en) * 2018-05-09 2019-09-10 东莞市菱锐机械有限公司 A kind of six axis sanders
CN110497211B (en) * 2019-08-27 2020-09-15 杭州富阳孙氏机床有限公司 Digit control machine tool ray apparatus
CN111331475A (en) * 2020-04-09 2020-06-26 徐焕东 Electromechanical device spare and accessory part polisher

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CN103612186B (en) * 2013-12-17 2016-01-06 重庆大学 A kind of for complex-curved belt-sanding device

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