CN107855891A - A kind of abrasive band suitable for narrow abrasive band is tensioned adjusting deviation device and its implementation - Google Patents
A kind of abrasive band suitable for narrow abrasive band is tensioned adjusting deviation device and its implementation Download PDFInfo
- Publication number
- CN107855891A CN107855891A CN201711286916.8A CN201711286916A CN107855891A CN 107855891 A CN107855891 A CN 107855891A CN 201711286916 A CN201711286916 A CN 201711286916A CN 107855891 A CN107855891 A CN 107855891A
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- CN
- China
- Prior art keywords
- eccentric shaft
- shaft assembly
- abrasive band
- bolt
- tuningout
- Prior art date
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/18—Accessories
- B24B21/20—Accessories for controlling or adjusting the tracking or the tension of the grinding belt
Abstract
It is a kind of that the adjustment mechanism that can prevent abrasive band sideslip simultaneously is tensioned for belt sander abrasive band, it is made up of handle, eccentric shaft assembly, oscillating bearing, lock-screw, anchor ear, small clevis pin with head, tuningout intermediate mass, bolt end cap, guiding geosynclinal block, locking nut, adjustment bolt.Tension wheel shaft line position is changed by the rotation of eccentric shaft assembly, realizes that abrasive band is tensioned, lock-screw fixed eccentric shaft component circumferential position is used after the tensioning of abrasive band.Eccentric shaft assembly left end installs oscillating bearing, eccentric shaft assembly can carry out circumferential 360 ° of rotations around oscillating bearing axis, oscillating bearing axis can beat within the specific limits simultaneously, eccentric shaft assembly is driven to carry out beat on pitching, yaw direction, so as to adjust tensioning wheel axis posture, to be oriented to abrasive band, apply side force, ensure that sideslip does not occur for abrasive band.Eccentric shaft assembly right-hand member can move along guide groove, and adjustment bolt coordinates with tuningout intermediate mass, bolt end cap adjusts eccentric shaft assembly posture, and is locked by locking nut.
Description
Technical field
The present invention relates to a kind of belt sander abrasive band adjustment mechanism, and in particular to a kind of abrasive band suitable for narrow abrasive band, which is tensioned, adjusts
Inclined mechanism and its implementation.
Background technology
With the continuous propulsion of industrial automation process, in traditional belt sander polishing field, more and more using machine
Device people is polished, and the design of robot polishing end effector is generally limited by robot self-bearing capacity, can only use
Relatively simple, light structure.
Robot is generally used for noncontact procession, manufacturing process in the industrial production, such as carries, welds, assembling, machine
Device people polishing end effector needs to carry out customizations design for robot performance's feature.Belt sander is one in polishing operation
Kind common equipment, there is many advantages, such as versatility is good, polishing works well, its abrasive band tension mechanism is integrally tied to belt sander
Structure complexity plays decisive influence, and conventional abrasive band tension mechanism includes eccentric axis tensioning mechanism, cylinder strainer, cam
Tight mechanism etc..Because misalignment of axe caused by mismachining tolerance can cause abrasive band transverse shifting, generation sideslip, belt sander use is influenceed
Effect.
Belt sander, which is that one kind in polishing operation is conventional, to be equipped, and the abrasive band tension mechanism in belt sander is to influence its integrally to tie
An important factor for structure complexity and performance, common abrasive band tension mechanism include eccentric axis tensioning mechanism, cylinder tensioning device
Structure, cam strainer etc..In addition to eccentric axis tensioning mechanism, other strainers usually require guider, extra to take sky
Between larger, heavier-weight.Simultaneously as the presence of mismachining tolerance, cannot be guaranteed between belt sander driving wheel and passive wheel axis
The preferable depth of parallelism, cause abrasive band in belt sander operation process that sideslip occurs.
The content of the invention
In view of the shortcomings of the prior art, the invention provides a kind of abrasive band tension mechanism for preventing abrasive band sideslip, mechanism
Size is smaller, lighter in weight, is highly suitable to be applied on robot polishing end effector；Simultaneously as its tuningout principle is not
Limited by abrasive band width, therefore still there is good tuningout effect to the less narrow abrasive band of width.
A kind of abrasive band suitable for narrow abrasive band of the present invention is tensioned adjusting deviation device, including：Handle, eccentric shaft assembly, joint
Bearing, lock-screw, anchor ear, small clevis pin with head, tuningout intermediate mass, bolt end cap, guiding geosynclinal block, locking nut, adjustment bolt；It is described
Eccentric shaft assembly rotation realizes that abrasive band is tensioned, and lock-screw fixed eccentric shaft component circumferential position is used after the tensioning of abrasive band；It is eccentric
Shaft assembly left end installs oscillating bearing, and eccentric shaft assembly can be rotated in a circumferential direction around oscillating bearing axis, while oscillating bearing axle
Line can beat within the specific limits；Eccentric shaft assembly right-hand member can move along geosynclinal block is oriented to, adjustment bolt and tuningout intermediate mass, bolt
End cap, which coordinates, adjusts eccentric shaft assembly posture, and is locked by locking nut；Eccentric shaft element end is provided with handle, control
Eccentric shaft assembly is made to rotate around oscillating bearing axis；The adjustment bolt left end is regular hexagon, for screwing for adjustment bolt；
Centre is thread segment, is coordinated with being oriented to screw thread on geosynclinal block, regulating bolt position；Right-hand member is spheroid, with tuningout intermediate mass, bolt end
Lid coordinates；There is a pin-and-hole tuningout intermediate mass lower end, and forming pin-and-hole with small clevis pin with head coordinates；The anchor ear is matched somebody with somebody with eccentric shaft assembly
Close, provide support force and clamping force for eccentric shaft assembly, locking nut coordinates with lock-screw, clamps eccentric shaft assembly right-hand member；
Anchor ear upper end through hole forms pin-and-hole with small clevis pin with head and coordinated.
Further, the eccentric shaft assembly includes tensioning wheel, central shaft, connecting plate；Central shaft and the axle axle of tension wheel shaft two
Wire spacing certain distance, two between centers are held together admittedly by two pieces of connecting plates.
Further, the guiding geosynclinal block contains guide groove, coordinates with the center shaft end of the eccentric shaft assembly and realizes partially
Arbor assembly is swung along guide slot centerlines direction；And comprising one section of screw thread, fixed eccentric shaft is coordinated to swing with adjustment bolt
Angle, the screw thread generally use fine thread.
Further, the tuningout intermediate mass and bolt end cap respectively include a part of ball-and-socket, match somebody with somebody with adjustment bolt right-hand member spheroid
Close, form higher pair, can be with adjustment bolt threadingly axis direction movement.
Another technical scheme of the present invention is, there is provided a kind of to be tensioned tuningout based on the above-mentioned abrasive band suitable for narrow abrasive band
The implementation method of mechanism, its step are as follows：
1) eccentric shaft assembly rear end is enclosed on oscillating bearing, and oscillating bearing is arranged on grinding head body, eccentric shaft assembly
End is provided with one handle, controls eccentric shaft assembly to be rotated around oscillating bearing axis, when eccentric shaft assembly rotates, its tension wheel shaft
Line position changes, and is tensioned abrasive band；
2) eccentric shaft assembly right-hand member insertion is oriented in the guide groove of geosynclinal block, eccentric shaft assembly is put along guide groove direction
It is dynamic；
3) be oriented to geosynclinal block to be installed on grinding head body, be screwed into adjustment bolt at its screw thread, adjustment bolt with tuningout
Between block, bolt end cap form the connection of sphere higher pair, tuningout intermediate mass is connected by small clevis pin with head with anchor ear, and anchor ear holding circle is placed on partially
Arbor assembly right-hand member；
4) locking nut is used for fixed adjustment bolt position, and lock-screw coordinates with locking screw on anchor ear makes anchor ear banding
Eccentric shaft assembly right-hand member, fixed eccentric shaft component circumferential position.
The a kind of of the present invention is tensioned the adjustment mechanism that can prevent abrasive band sideslip simultaneously for belt sander abrasive band, by abrasive band
It is oriented to, applies side force, ensures that sideslip does not occur for abrasive band.Eccentric shaft assembly right-hand member can move along guide groove, adjustment bolt
Coordinate with tuningout intermediate mass, bolt end cap and adjust eccentric shaft assembly posture, and be locked by locking nut.Eccentric shaft assembly
Left end installs oscillating bearing, and eccentric shaft assembly can carry out circumferential 360 ° of rotations, while oscillating bearing axis around oscillating bearing axis
Can (be usually 9 °~14 °) beat within the specific limits, that is, drive eccentric shaft assembly to carry out beat on pitching, yaw direction,
So as to adjust tensioning wheel axis posture.The invention provides a kind of simple in construction, reliable abrasive band tension mechanism, space-consuming is very
It is small, while solve the problems, such as abrasive band sideslip, it is very suitable for the abrasive band tensioning tuningout of narrower width, there is premium properties.
Brief description of the drawings
A kind of abrasive band suitable for narrow abrasive band that Fig. 1 is the present invention is tensioned adjusting deviation device structural representation；
Fig. 2 is the eccentric shaft component structure diagram of the present invention；
Fig. 3 is the guide groove block structure schematic diagram of the present invention；
Fig. 4 is the adjustment bolt structural representation of the present invention；
Fig. 5 is the tuningout intermediate mass structural representation of the present invention；
Fig. 6 is the bolt end cap structural representation of the present invention；
Fig. 7 is the hooping structure schematic diagram of the present invention；
Fig. 8 is the abrasive band deviation principle schematic of the present invention.
Embodiment
The present invention devises a kind of abrasive band suitable for narrow abrasive band and is tensioned adjusting deviation device, while can adjust the axle of eccentric shaft
Line swaying direction, is oriented to abrasive band, applies side force, prevents abrasive band from sideslip occurs during running at high speed.
It is a kind of that the adjustment mechanism that can prevent abrasive band sideslip simultaneously is tensioned for belt sander abrasive band, mainly by handle 1, eccentric shaft
Component 2, oscillating bearing 3, lock-screw 4, anchor ear 5, small clevis pin with head 6, tuningout intermediate mass 7, bolt end cap 8, guiding geosynclinal block 9, locking
The parts such as nut 10, adjustment bolt 31 and each mounting blocks form, as shown in Figure 1.
The axial location of tensioning wheel 11 is changed by the rotation of eccentric shaft assembly 2, realizes that abrasive band is tensioned, is used after the tensioning of abrasive band
The fixed eccentric shaft component circumferential position of lock-screw 4.The eccentric left end of shaft assembly 2 installs oscillating bearing 3, and eccentric shaft assembly 2 can be around
The axis of oscillating bearing 3 carries out circumferential 360 ° of rotations, while the axis of oscillating bearing 3 can beat, i.e. drive be eccentric within the specific limits
Shaft assembly 1 carries out beat on pitching, yaw direction, so as to adjust tensioning wheel axis posture, to be oriented to abrasive band, applies
Side force, ensure that sideslip does not occur for abrasive band.The eccentric right-hand member of shaft assembly 2 can move along geosynclinal block 9 is oriented to, in adjustment bolt 31 and tuningout
Between block, bolt end cap 8 coordinate and adjust the eccentric posture of shaft assembly 2, and be locked by locking nut 10.
Shown in the eccentric shaft assembly such as Fig. 2 (a), (b), central shaft 12 and the axle axle wire spacing of 11 axle of tensioning wheel two are certain
Distance, two between centers are held together admittedly by two pieces of connecting plates 13, due to using separation design, eccentric throw (i.e. central shaft
12 with the axle axle wire spacing of tension wheel shaft two) can be in interior regulation in a big way, to meet use demand.Central shaft 12 rotates
When, then drive tensioning wheel 11 rotatable around its axis, so as to change the position of tensioning wheel 11, to be tensioned abrasive band.
It is described to be oriented to geosynclinal block 9 as shown in figure 3, containing guide groove 21, coordinate with the center shaft end of the eccentric shaft assembly 2
Realize that eccentric shaft assembly 2 is swung along guide slot centerlines direction, and comprising one section of screw thread, coordinate with adjustment bolt 31 fixed inclined
Mandrel swings angle, screw thread generally use closely-pitched, to improve the resolution ratio of eccentric shaft assembly angle adjustment.
The adjustment bolt 31 is as shown in figure 4, left end is regular hexagon, for screwing for adjustment bolt 31；Centre is spiral shell
Line section, coordinate with being oriented to screw thread on geosynclinal block 9, regulating bolt position；Right-hand member is spheroid, is matched somebody with somebody with tuningout intermediate mass 7, bolt end cap 8
Close, can both realize screwing for adjustment bolt 31, also can in the range of certain angle beat, prevent that adjusting deviation device is stuck.
As shown in Figure 5, Figure 6, two parts respectively include a part of ball-and-socket, with tune for the tuningout intermediate mass 7 and bolt end cap 8
Whole bolt right-hand member spheroid coordinates, and forms higher pair, can be with adjustment bolt threadingly axis direction movement.The lower end of tuningout intermediate mass 7
There is a pin-and-hole, forming pin-and-hole with small clevis pin with head 6 coordinates.
The anchor ear 5 is inclined as shown in fig. 7, containing the center shaft end cooperation in a holding circle, with eccentric shaft assembly 2
Arbor assembly 2 provides support force and clamping force, the locking screw of anchor ear 5 coordinate with lock-screw 4, clamps eccentric shaft assembly right-hand member.
The upper end through hole of anchor ear 5 forms pin-and-hole with small clevis pin with head 6 and coordinated.
A kind of implementation method that adjusting deviation device is tensioned based on the above-mentioned abrasive band suitable for narrow abrasive band, its step are as follows：
1) the eccentric rear end of shaft assembly 2 is enclosed on oscillating bearing 3, and oscillating bearing 3 is arranged on grinding head body, eccentric shaft group
The end of part 2 is provided with one handle 1, controls eccentric shaft assembly to be rotated around oscillating bearing axis, and when eccentric shaft assembly rotates, it is tensioned
Axial position changes, and is tensioned abrasive band；
2) the eccentric right-hand member of shaft assembly 2 insertion is oriented in the guide groove of geosynclinal block 9, makes eccentric shaft assembly 2 can be along guide groove direction
Swing；
3) it is oriented to geosynclinal block 7 to be installed on grinding head body, adjustment bolt 31 is screwed at its screw thread, adjustment bolt 31 is with adjusting
Inclined intermediate mass 7, bolt end cap 8 form the connection of sphere higher pair, and tuningout intermediate mass 7 is connected by small clevis pin with head 6 with anchor ear 5, and anchor ear is embraced
Collar is placed on the eccentric right-hand member of shaft assembly 2.
4) locking nut 10 is used for the position of fixed adjustment bolt 31, and lock-screw coordinates with locking screw on anchor ear makes anchor ear
Banding bias shaft assembly right-hand member, fixed eccentric shaft component circumferential position.
Described adjustment mechanism, its abrasive band deviation principle are as described below：Screw adjustment bolt and change its position in the axial direction
Put, adjustment bolt tail end sphere drives tuningout intermediate mass and the movement of bolt end cap, and tuningout intermediate mass is connected as one with bolt end cap
Individual entirety, tuningout intermediate mass drive anchor ear to move by small clevis pin with head, and anchor ear drives eccentric shaft assembly to move by holding circle, so as to
Realize the two-way beat of eccentric shaft assembly.
The two-way beat of eccentric shaft assembly drives tensioning wheel around center line Double-directional rotary, as shown in figure 8, to being close to tensioning wheel
81 abrasive band 82 play the guiding role, and applies certain side force, so as to offset due to the sideslip of abrasive band 82 caused by foozle, is formed
Stable equilibrium, ensure the lateral stability in abrasive band 82 in bruting process.
When concrete operations are realized：
1) abrasive band is enclosed on the tensioning wheel of eccentric shaft assembly；
2) rotational handle drives eccentric shaft assembly to rotate, and is tensioned abrasive band；
3) belt sander motor, position and displacement of the observation abrasive band along eccentric shaft assembly axial direction, if abrasive band sideslip occurs are started
Phenomenon, then adjustment bolt is rotated, change its amount of screwing, drive eccentric shaft to swing, until abrasive band is steadily transported in centre position
OK, sideslip no longer occurs；
4) locking nut, fixed adjustment bolt position are screwed；
5) lock-screw is tightened, makes anchor ear banding bias shaft assembly, fixes its circumferential position, ensures not send out in bruting process
Raw deflection.
Claims (5)
1. a kind of abrasive band suitable for narrow abrasive band is tensioned adjusting deviation device, it is characterised in that including：Handle, eccentric shaft assembly, joint
Bearing, lock-screw, anchor ear, small clevis pin with head, tuningout intermediate mass, bolt end cap, guiding geosynclinal block, locking nut, adjustment bolt；
The eccentric shaft assembly rotation realizes that abrasive band is tensioned, and lock-screw fixed eccentric shaft component circumference position is used after the tensioning of abrasive band
Put；Eccentric shaft assembly left end installs oscillating bearing, and eccentric shaft assembly can be rotated in a circumferential direction around oscillating bearing axis, while joint
Bearing axis can beat within the specific limits；Eccentric shaft assembly right-hand member can move along geosynclinal block is oriented to, among adjustment bolt and tuningout
Block, bolt end cap, which coordinate, adjusts eccentric shaft assembly posture, and is locked by locking nut；Eccentric shaft element end is provided with
Handle, eccentric shaft assembly is controlled to be rotated around oscillating bearing axis；
The adjustment bolt left end is regular hexagon, for screwing for adjustment bolt；Centre is thread segment, with being oriented to spiral shell on geosynclinal block
Line coordinates, regulating bolt position；Right-hand member is spheroid, is coordinated with tuningout intermediate mass, bolt end cap；The tuningout intermediate mass lower end has
One pin-and-hole, form pin-and-hole with small clevis pin with head and coordinate；
The anchor ear coordinates with eccentric shaft assembly, and support force and clamping force, locking nut and locking screw are provided for eccentric shaft assembly
Nail coordinates, and clamps eccentric shaft assembly right-hand member；Anchor ear upper end through hole forms pin-and-hole with small clevis pin with head and coordinated.
2. a kind of abrasive band suitable for narrow abrasive band as claimed in claim 1 is tensioned adjusting deviation device, it is characterised in that the bias
Shaft assembly includes tensioning wheel, central shaft, connecting plate；Spaced apart, two between centers between central shaft and the axle axis of tension wheel shaft two
Held together admittedly by two pieces of connecting plates.
3. a kind of abrasive band suitable for narrow abrasive band as claimed in claim 2 is tensioned adjusting deviation device, it is characterised in that the guiding
Geosynclinal block contains guide groove, coordinates with the center shaft end of the eccentric shaft assembly and realizes eccentric shaft assembly along guide slot centerlines side
To swing；And comprising one section of screw thread, coordinate fixed eccentric shaft swing angle, the screw thread generally use closely-pitched with adjustment bolt
Screw thread.
4. a kind of abrasive band suitable for narrow abrasive band as claimed in claim 2 is tensioned adjusting deviation device, it is characterised in that the tuningout
Intermediate mass and bolt end cap respectively include a part of ball-and-socket, coordinate with adjustment bolt right-hand member spheroid, form higher pair, can be with adjustment spiral shell
Threadingly axis direction moves bolt.
5. based on a kind of realization that adjusting deviation device is tensioned based on the above-mentioned abrasive band suitable for narrow abrasive band described in claim 1 or 2
Method, its step are as follows：
1) eccentric shaft assembly rear end is enclosed on oscillating bearing, and oscillating bearing is arranged on grinding head body, eccentric shaft element end
One handle is installed, controls eccentric shaft assembly to be rotated around oscillating bearing axis, when eccentric shaft assembly rotates, its tensioning wheel axis position
Put and change, be tensioned abrasive band；
2) eccentric shaft assembly right-hand member insertion is oriented in the guide groove of geosynclinal block, eccentric shaft assembly is swung along guide groove direction；
3) it is oriented to geosynclinal block to be installed on grinding head body, is screwed into adjustment bolt at its screw thread, adjustment bolt and tuningout intermediate mass,
Bolt end cap forms the connection of sphere higher pair, and tuningout intermediate mass is connected by small clevis pin with head with anchor ear, and anchor ear holding circle is placed on eccentric shaft
Component right-hand member；
4) locking nut is used for fixed adjustment bolt position, and lock-screw coordinates with locking screw on anchor ear makes anchor ear banding eccentric
Shaft assembly right-hand member, fixed eccentric shaft component circumferential position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711286916.8A CN107855891A (en) | 2017-12-07 | 2017-12-07 | A kind of abrasive band suitable for narrow abrasive band is tensioned adjusting deviation device and its implementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711286916.8A CN107855891A (en) | 2017-12-07 | 2017-12-07 | A kind of abrasive band suitable for narrow abrasive band is tensioned adjusting deviation device and its implementation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107855891A true CN107855891A (en) | 2018-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711286916.8A Pending CN107855891A (en) | 2017-12-07 | 2017-12-07 | A kind of abrasive band suitable for narrow abrasive band is tensioned adjusting deviation device and its implementation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107855891A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109718588A (en) * | 2019-03-12 | 2019-05-07 | 河北绿之梦环保科技有限公司 | A kind of deviation correcting device and tuningout method of belt filter press strainer |
| CN110682190A (en) * | 2019-07-08 | 2020-01-14 | 上海航天设备制造总厂有限公司 | Abrasive belt tensioning and deviation adjusting mechanism capable of keeping tension force basically constant and implementation method thereof |
| CN114227474A (en) * | 2021-12-22 | 2022-03-25 | 上海航天设备制造总厂有限公司 | Aerodynamic force compliance control finger-shaped abrasive belt grinding device, system and grinding method |
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| DE4310887A1 (en) * | 1993-04-02 | 1994-10-06 | Almi Maschf Bv | Device for the end molding of tubular workpieces with different diameters |
| CN2305524Y (en) * | 1997-07-21 | 1999-01-27 | 核工业理化工程研究院 | Belt wheel device for regulating drive-belt centring |
| CN1301613A (en) * | 1999-12-30 | 2001-07-04 | 肖文武 | Super fine belt milling device |
| CN106737030A (en) * | 2016-12-13 | 2017-05-31 | 上海航天设备制造总厂 | A kind of abrasive band tension mechanism and its implementation for preventing abrasive band sideslip |
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2017
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2136104Y (en) * | 1992-06-03 | 1993-06-16 | 赵文海 | Adjusting mechanism for semisphere hinge-type abrasive belt |
| DE4310887A1 (en) * | 1993-04-02 | 1994-10-06 | Almi Maschf Bv | Device for the end molding of tubular workpieces with different diameters |
| CN2305524Y (en) * | 1997-07-21 | 1999-01-27 | 核工业理化工程研究院 | Belt wheel device for regulating drive-belt centring |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109718588A (en) * | 2019-03-12 | 2019-05-07 | 河北绿之梦环保科技有限公司 | A kind of deviation correcting device and tuningout method of belt filter press strainer |
| CN109718588B (en) * | 2019-03-12 | 2024-03-15 | 河北绿之梦环保科技有限公司 | Deviation adjusting device and deviation adjusting method for filter belt of belt filter press |
| CN110682190A (en) * | 2019-07-08 | 2020-01-14 | 上海航天设备制造总厂有限公司 | Abrasive belt tensioning and deviation adjusting mechanism capable of keeping tension force basically constant and implementation method thereof |
| CN114227474A (en) * | 2021-12-22 | 2022-03-25 | 上海航天设备制造总厂有限公司 | Aerodynamic force compliance control finger-shaped abrasive belt grinding device, system and grinding method |
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Application publication date: 20180330 |