CN110405579A - A kind of comprehensive grinding device of cylindric electronic component - Google Patents
A kind of comprehensive grinding device of cylindric electronic component Download PDFInfo
- Publication number
- CN110405579A CN110405579A CN201910716520.5A CN201910716520A CN110405579A CN 110405579 A CN110405579 A CN 110405579A CN 201910716520 A CN201910716520 A CN 201910716520A CN 110405579 A CN110405579 A CN 110405579A
- Authority
- CN
- China
- Prior art keywords
- electronic component
- rotation
- cyclone separator
- cylindric
- grinding device
- 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
-
- 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
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
-
- 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
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
- B24B41/067—Work supports, e.g. adjustable steadies radially supporting workpieces
-
- 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
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
- B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
-
- 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
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/06—Dust extraction equipment on grinding or polishing machines
-
- 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
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/12—Devices for exhausting mist of oil or coolant; Devices for collecting or recovering materials resulting from grinding or polishing, e.g. of precious metals, precious stones, diamonds or the like
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
Abstract
The present invention relates to Electronic Components Manufacturing apparatus fields, specifically disclose a kind of comprehensive grinding device of cylindric electronic component, including workbench, the upper surface of workbench is equipped with cyclone separator and rotation fastening plate, workbench is equipped with first motor by support frame, the output axis connection grinding wheel of first motor, rotation fastening plate and gear rotate coaxially setting on the table, the second motor is fixedly installed on workbench, second motor is connected with interruption gear and rubber ring, the side wall of rotation fastening plate uniformly offers several clamping slots, the inside rotation of clamping slot is provided with rotating wheel, rotating wheel is connected with rubber wheel.The inlet end of cyclone separator is communicated with suction inlet, and the bottom of cyclone separator is communicated with collection box, and the outlet side of cyclone separator is communicated with air pump.The invention has the advantages that structure is simple, easy to operate, grinding efficiency is high, high-quality, and air-treatment quality is high, and production cost is low, is convenient for promotion and implementation.
Description
Technical field
The present invention relates to Electronic Components Manufacturing apparatus field, specifically a kind of cylindric comprehensive polishing of electronic component
Device.
Background technique
Electronic component is the component part of electronic component and electric small-sized machine, instrument, itself is often by several parts
It constitutes, it can be general in similar product；Often refer to electric appliance, radio, the industry such as instrument certain parts, as capacitor, transistor,
The general name of the sub- device such as balance spring, clockwork spring.In the prior art, Electronic Components Manufacturing still remains many deficiencies with grinding device
Place lacks clast and blocks function, and the clast that electronic component generates during the grinding process is easy to be splashed to staff's eye
In eyeball, there are security risks, while existing Electronic Components Manufacturing is bad with grinding device protecting effect.
Chinese patent (notification number: 206578658 U of CN, the day for announcing: 2017.10.24) discloses a kind of electronic component
It produces and uses grinding device, including pedestal, be fixedly connected with first support on the right side of base top, the top on the left of first support is solid
Surely it is connected with second support, motor is provided on the left of second support bottom, the output end of motor is fixedly connected with mill, pedestal
Top be fixedly connected with workbench, be fixedly connected at the top of pedestal there are two baffle.Pass through setting blast pipe, the first connection
Pipe, the second connecting tube, blower, water tank, third connecting tube, sponge block, portable pillar, paddle, discharge pipe and controller, solve
The problem of existing grinding device can not be handled dust in electronic component bruting process, the electronic component are raw
It produces and uses grinding device, have the advantages of dedusting, avoid dust and particles float in the sky, protect the health of user,
The use for the person of being convenient to use.But the grinding device not can be carried out continuity polishing, needs individually to fix electronic component, make
At polishing low efficiency, and it can not achieve comprehensive polishing.Reduce polishing quality.
Summary of the invention
The purpose of the present invention is to provide a kind of cylindric comprehensive grinding devices of electronic component, to solve above-mentioned background
The problem of being proposed in technology.
To achieve the above object, the invention provides the following technical scheme:
A kind of comprehensive grinding device of cylindric electronic component, including workbench, cyclone separator and rotation fastening plate.Work
The upper surface of platform is equipped with cyclone separator and rotation fastening plate, rotates the side of fastening plate in the fixed peace in the upper surface of workbench
Equipped with support frame, the top lower surface of support frame is fixedly installed with first motor, the coaxially fixed polishing of the output shaft of first motor
Wheel, under the driving of first motor, grinding wheel rotation polishes to electronic component.Rotation fastening plate is rotatably arranged on workbench
Upper surface, rotate and be fixedly and coaxially connected gear below fastening plate, the side of gear is fixedly installed on the table
Two motors, the output shaft of the second motor are coaxially connected with interruption gear and rubber ring, and interruption gear is engaged with gear.In the second electricity
Under the driving of machine, interrupted toothing wheeling driving gear intermittent rotation, to make to rotate fastening plate intermittent rotary on the table.Rotation
The side wall of fastening plate uniformly offers several clamping slots, and the inside rotation of clamping slot is provided with rotating wheel, the lower end of rotating wheel
It has been fixedly and coaxially connected rubber wheel, when clamping slot turns to the second motor side, the outer side contacts of rubber wheel and rubber ring, rubber
Cushion rubber drives rubber wheel rotation to make rotating wheel rotate.Clamping slot is internally provided with clamping element.
The inlet end of cyclone separator is communicated with suction inlet, into inside cyclone separator air and dust in whirlwind point
From being separated inside device.The bottom of cyclone separator is communicated with collection box, and collection box is arranged in workbench, separates generation
Dust collects in the inside of collection box.Dust can be cleaned up by opening collection box.The outlet side of cyclone separator is by going out
Tracheae is communicated with air pump, and under the action of air pump, negative pressure is generated inside cyclone separator, to by the dust of polishing generation and have
Inside evil gas sucking cyclone separator.
As a further solution of the present invention: support frame is L-type structure.
As a further solution of the present invention: clamping element includes electromagnet, steel pole and pinch wheels, and the inner ends thereof of steel pole connects
It connects in the rotation fastening plate of rotating wheel two sides, the outer end rotation of steel pole is provided with pinch wheels, and the inside of steel pole is fastened in rotation
It is fixedly installed with electromagnet on disk, magnetic field is generated under electromagnet energized state, steel pole is inwardly leaned on to central rotational, two pinch wheels
Hold together, electronic component is placed on the inside of clamping slot, and pinch wheels are stuck in the side of electronic component, and two pinch wheels and rotating wheel will be electric
Subcomponent is blocked, and rotating wheel rotation drives electronic component rotation, so as to carry out comprehensive polishing.Rotate the upper table of fastening plate
Face radial position is provided with change-over switch, and change-over switch is electrically connected with the electromagnet inside corresponding clamping slot, passes through conversion
Switch can control solenoid circuit and be powered and disconnect.
As a further solution of the present invention: suction inlet is horn-like structure, and the dust generated convenient for polishing enters whirlwind
Separator interior.
As a further solution of the present invention: the end of escape pipe is provided with dust filter screen, and dust filter screen will be without thorough
Isolated dust is filtered, and improves filter quality.
As a further solution of the present invention: the middle position of dust filter screen is fixedly installed central axis, same on central axis
Axis rotation is provided with hairbrush and flabellum, and hairbrush is fixedly connected with flabellum.Hairbrush is contacted with dust filter screen bottom, the air band of flowing
Dynamic flabellum rotation, so that hairbrush be made to rotate, the dust in the hairbrush part dust filter screen of rotation is cleaned up.Avoid dust filter screen
Blocking, the filtering of guarantee smoothly carry out.
As a further solution of the present invention: escape pipe is internally provided with active carbon filling, the setting of active carbon filling
Pernicious gas in gas is adsorbed, air-treatment quality is improved.
As a further solution of the present invention: grinding wheel is the thick dumbbell structure in intermediate thin both ends, the setting of grinding wheel
Convenient for polishing electronic component side and both ends, keep polishing more abundant.
Compared with prior art, it the beneficial effects of the present invention are: passing through the cooperation of rotation fastening plate and clamping element, realizes
Continuity polishing, improves work efficiency, and drives rotation fastening plate and electronic component to rotate using a motor, keeps device simple
Change, reduces production cost.The rotation of electronic component is realized by the drive of rotating wheel, so that comprehensive polishing is realized,
Improve polishing quality.Separation dust is carried out using cyclone separator, reduces separation costs.The air driven fan blade rotating of flowing
Dynamic, so that hairbrush be made to rotate, the dust in the hairbrush part dust filter screen of rotation is cleaned up.The blocking of dust filter screen is avoided, is protected
The filtering of card smoothly carries out., active carbon filling setting the pernicious gas in gas is adsorbed, improve air-treatment
Quality.The setting of grinding wheel keeps polishing more abundant convenient for polishing electronic component side and both ends.The invention has the advantages that
Structure is simple, easy to operate, and grinding efficiency is high, high-quality, and air-treatment quality is high, and production cost is low, is convenient for promotion and implementation.
Detailed description of the invention
Fig. 1 is a kind of schematic perspective view of cylindric comprehensive grinding device of electronic component.
Fig. 2 is the structural schematic diagram that fastening plate is rotated in a kind of cylindric comprehensive grinding device of electronic component.
Fig. 3 is a kind of structural schematic diagram of clamping element in cylindric comprehensive grinding device of electronic component.
Fig. 4 is a kind of structural schematic diagram of cyclone separator in cylindric comprehensive grinding device of electronic component.
In figure, workbench 1, support frame 2, first motor 3, grinding wheel 4, suction inlet 5, cyclone separator 6, air pump 7, conversion
Switch 8 rotates fastening plate 9, clamping slot 10, rotating wheel 11, gear 12, interruption gear 13, the second motor 14, rubber ring 15, rubber
Rubber tire 16, electromagnet 17, steel pole 18, pinch wheels 19, electronic component 20, escape pipe 21, active carbon filling 22, dust filter screen 23,
Hairbrush 24, central axis 25 rotate leaf 26, collection box 27.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, this hair of Detailed description of the invention is now compareed
It is bright.
Embodiment 1
Please refer to Fig. 1-4, a kind of cylindric comprehensive grinding device of electronic component, including workbench 1,6 and of cyclone separator
Rotate fastening plate 9.The upper surface of workbench 1 is equipped with cyclone separator 6 and rotation fastening plate 9, and the side of rotation fastening plate 9 exists
The upper surface of workbench 1 is fixedly installed with support frame 2, and support frame 2 is L-type structure.The top lower surface of support frame 2 is fixedly mounted
There is first motor 3, the output shaft of first motor 3 coaxially fixes grinding wheel 4, and under the driving of first motor 3, grinding wheel 4 is rotated
It polishes electronic component 20.Rotation fastening plate 9 is rotatably arranged on the upper surface of workbench 1, and the lower section for rotating fastening plate 9 is same
Axis is fixedly connected with gear 12, and the side of gear 12 is fixedly installed with the second motor 14 on workbench 1, the second motor 14 it is defeated
Shaft is coaxially connected with interruption gear 13 and rubber ring 15, and interruption gear 13 is engaged with gear 12.In the driving of the second motor 14
Under, interruption gear 13 is rotated with 12 intermittent of moving gear, to make to rotate the intermittent rotary on workbench 1 of fastening plate 9.Rotation is tight
Gu the side wall of disk 9 uniformly offers several clamping slots 10, the inside rotation of clamping slot 10 is provided with rotating wheel 11, rotating wheel 11
Lower end be fixedly and coaxially connected rubber wheel 16, when clamping slot 10 turns to the second 14 side of motor, rubber wheel 16 and rubber
The outer side contacts of circle 15, rubber ring 15 drive the rotation of rubber wheel 16 to make rotating wheel 11 rotate.
Clamping slot 10 is internally provided with clamping element, and clamping element includes electromagnet 17, steel pole 18 and pinch wheels 19, steel pole 18
Inner ends thereof be connected in the rotation fastening plate 9 of 11 two sides of rotating wheel, the rotation of the outer end of steel pole 18 is provided with pinch wheels 19, steel
The inside of bar 18 is fixedly installed with electromagnet 17 in rotation fastening plate 9, and magnetic field, steel pole 18 are generated under 17 energized state of electromagnet
To central rotational, two pinch wheels 19 come closer, and electronic component 20 is placed on the inside of clamping slot 10, and pinch wheels 19 are stuck in electricity
The side of subcomponent 20, two pinch wheels 19 and rotating wheel 11 block electronic component 20, and the rotation of rotating wheel 11 drives electronics member
Part 20 rotates, so as to carry out comprehensive polishing.The upper surface radial position of rotation fastening plate 9 is provided with change-over switch 8, turns
It changes switch 8 to be electrically connected with the electromagnet 17 inside corresponding clamping slot 10,17 electricity of electromagnet can control by change-over switch 8
Road is powered and disconnects.
The inlet end of cyclone separator 6 is communicated with suction inlet 5, and suction inlet 5 is horn-like structure, the ash generated convenient for polishing
Dirt enters inside cyclone separator 6.Into inside cyclone separator 6 air and dust divided inside cyclone separator 6
From.The bottom of cyclone separator 6 is communicated with collection box 27, and collection box 27 is arranged in workbench 1, and the dust for separating generation collects
In the inside of collection box 27.Dust can be cleaned up by opening collection box 27.The outlet side of cyclone separator 6 passes through escape pipe
21 are communicated with air pump 7, under the action of air pump 7, generate negative pressure inside cyclone separator 6, thus will polishing generate dust and
Pernicious gas sucks inside cyclone separator 6.The end of escape pipe 21 is provided with dust filter screen 23, and dust filter screen 23 will be not thorough
The dust of bottom separation is filtered, and improves filter quality.Escape pipe 21 is internally provided with active carbon filling 22, and active carbon is filled out
It fills 22 setting to adsorb the pernicious gas in gas, improves air-treatment quality.
The working principle of the invention is: electronic component 20 being placed on to the inside of clamping slot 10, and determines position, by turning
Changing switch 8 makes electromagnet 17 be powered.Generate magnetic field under 17 energized state of electromagnet, steel pole 18 is to central rotational, two pinch wheels
19 come closer, and pinch wheels 19 are stuck in the side of electronic component 20, and two pinch wheels 19 and rotating wheel 11 block electronic component 20
Firmly, under the driving of the second motor 14, interruption gear 13 is rotated with 12 intermittent of moving gear, to make to rotate fastening plate 9 in work
Make intermittent rotary on platform 1.Electronic component 20 is contacted with grinding wheel 4, and rotation fastening plate 9 stops operating at this time, rubber wheel 16 and rubber
The outer side contacts of cushion rubber 15, rubber ring 15 drive the rotation of rubber wheel 16 to make rotating wheel 11 rotate.The rotation of rotating wheel 11 drives
Electronic component 20 rotates, so as to carry out comprehensive polishing.It is generated under the action of air pump 7, inside cyclone separator 6 negative
Pressure, thus inside dust and pernicious gas the sucking cyclone separator 6 that polishing is generated.Sky into inside cyclone separator 6
Gas and dust are separated inside cyclone separator 6.Dust enters inside collection box 27, opens collection box 27 and clears up dust
Out.Air filters and carries on the back 22 absorption of active carbon filling by dust filter screen 23, improves air-treatment quality.Electronic component 20 is beaten
Mill terminates to produce, and disconnects 17 circuit of electromagnet by change-over switch 8, takes out electronic component 20.
Embodiment 2
On the basis of embodiment 1, the middle position of dust filter screen 23 is fixedly installed central axis 25, coaxially turns on central axis 25
Dynamic to be provided with hairbrush 24 and flabellum 26, hairbrush 24 is fixedly connected with flabellum 26.Hairbrush 24 is contacted with 23 bottom of dust filter screen, flowing
Air driven flabellum 26 rotate, so that hairbrush 24 be made to rotate, the dust in 24 dust filter screens 23 of hairbrush of rotation is cleaned up.
The blocking of dust filter screen 23 is avoided, the filtering of guarantee smoothly carries out.Grinding wheel 4 is the thick dumbbell shaped knot in intermediate thin both ends
Structure, the setting of grinding wheel 4 keep polishing more abundant convenient for polishing 20 side of electronic component and both ends.
The preferred embodiment of the present invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, several deformations can also be made, improves and substitutes, these belong to this hair
Bright protection scope.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (8)
1. a kind of comprehensive grinding device of cylindric electronic component, including workbench (1), cyclone separator (6) and rotation are tight
Gu disk (9), the upper surface of workbench (1) is equipped with cyclone separator (6) and rotation fastening plate (9), the upper surface of workbench (1)
It is fixedly installed with support frame (2), the top lower surface of support frame (2) is fixedly installed with first motor (3), first motor (3)
Output shaft is coaxially fixed with grinding wheel (4), which is characterized in that rotation fastening plate (9) and gear (12) rotate coaxially and be arranged in work
Make the upper surface of platform (1), to be fixedly installed on workbench (1) the second motor (14), the output shaft of the second motor (14) coaxially connects
It is connected to interruption gear (13) and rubber ring (15), interruption gear (13) is engaged with gear (12), and the side wall for rotating fastening plate (9) is equal
Even offers several clamping slots (10), and the inside rotation of clamping slot (10) is provided with rotating wheel (11), under rotating wheel (11)
End has been fixedly and coaxially connected rubber wheel (16)；
The inlet end of cyclone separator (6) is communicated with suction inlet (5), and the bottom of cyclone separator (6) is communicated with collection box (27),
The outlet side of cyclone separator (6) is communicated with air pump (7) by escape pipe (21).
2. a kind of cylindric comprehensive grinding device of electronic component according to claim 1, which is characterized in that support frame
It (2) is L-type structure.
3. a kind of cylindric comprehensive grinding device of electronic component according to claim 1 or 2, which is characterized in that folder
Tight part includes electromagnet (17), steel pole (18) and pinch wheels (19), and the inner ends thereof of steel pole (18) is connected to rotating wheel (11) two
In the rotation fastening plate (9) of side, the outer end rotation of steel pole (18) is provided with pinch wheels (19), and the inside of steel pole (18) is tight in rotation
Gu being fixedly installed with electromagnet (17) on disk (9), the upper surface radial position of rotation fastening plate (9) is provided with change-over switch (8),
Change-over switch (8) is electrically connected with the internal electromagnet (17) of corresponding clamping slot (10).
4. a kind of cylindric comprehensive grinding device of electronic component according to claim 1, which is characterized in that suction inlet
It (5) is horn-like structure.
5. a kind of cylindric comprehensive grinding device of electronic component according to claim 1, which is characterized in that escape pipe
(21) end is provided with dust filter screen (23).
6. a kind of cylindric comprehensive grinding device of electronic component according to claim 5, which is characterized in that dust filter
The middle position of net (23) is fixedly installed central axis (25), is rotated coaxially on central axis (25) and is provided with hairbrush (24) and flabellum
(26), hairbrush (24) is fixedly connected with flabellum (26), and hairbrush (24) is contacted with dust filter screen (23) bottom.
7. a kind of cylindric comprehensive grinding device of electronic component according to claim 5 or 6, which is characterized in that go out
Tracheae (21) is internally provided with active carbon filling (22).
8. a kind of cylindric comprehensive grinding device of electronic component according to claim 1, which is characterized in that grinding wheel
It (4) is the thick dumbbell structure in intermediate thin both ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910716520.5A CN110405579B (en) | 2019-08-05 | 2019-08-05 | All-round grinding device of cylindric electronic components |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910716520.5A CN110405579B (en) | 2019-08-05 | 2019-08-05 | All-round grinding device of cylindric electronic components |
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| CN110405579A true CN110405579A (en) | 2019-11-05 |
| CN110405579B CN110405579B (en) | 2021-06-08 |
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| CN201910716520.5A Active CN110405579B (en) | 2019-08-05 | 2019-08-05 | All-round grinding device of cylindric electronic components |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110802497A (en) * | 2019-11-16 | 2020-02-18 | 湖南利德森医疗器械有限公司 | Face guard burnishing device is used in operation |
| CN112108950A (en) * | 2020-09-25 | 2020-12-22 | 安徽普蓝滤清器设备有限公司 | End surface grinding device for filter machining |
| CN114633211A (en) * | 2022-02-28 | 2022-06-17 | 蚌埠学院 | Grinding wheel for glass edge grinding and rapid glass edge grinding machine |
| CN116713843A (en) * | 2023-08-08 | 2023-09-08 | 赣州至越机械有限公司 | Burr processing apparatus is used in differential mechanism casing production |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110802497A (en) * | 2019-11-16 | 2020-02-18 | 湖南利德森医疗器械有限公司 | Face guard burnishing device is used in operation |
| CN112108950A (en) * | 2020-09-25 | 2020-12-22 | 安徽普蓝滤清器设备有限公司 | End surface grinding device for filter machining |
| CN114633211A (en) * | 2022-02-28 | 2022-06-17 | 蚌埠学院 | Grinding wheel for glass edge grinding and rapid glass edge grinding machine |
| CN116713843A (en) * | 2023-08-08 | 2023-09-08 | 赣州至越机械有限公司 | Burr processing apparatus is used in differential mechanism casing production |
| CN116713843B (en) * | 2023-08-08 | 2023-10-27 | 赣州至越机械有限公司 | Burr processing apparatus is used in differential mechanism casing production |
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| Publication number | Publication date |
|---|---|
| CN110405579B (en) | 2021-06-08 |
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