CN110216575A - A kind of rolling burnishing device and method for needle valve valve rod - Google Patents
A kind of rolling burnishing device and method for needle valve valve rod Download PDFInfo
- Publication number
- CN110216575A CN110216575A CN201910586402.7A CN201910586402A CN110216575A CN 110216575 A CN110216575 A CN 110216575A CN 201910586402 A CN201910586402 A CN 201910586402A CN 110216575 A CN110216575 A CN 110216575A
- Authority
- CN
- China
- Prior art keywords
- roller unit
- rolling
- valve rod
- needle valve
- rolling roller
- 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.)
- Pending
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 153
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000004826 seaming Methods 0.000 claims abstract description 56
- 238000005498 polishing Methods 0.000 claims abstract description 32
- 238000009434 installation Methods 0.000 claims description 13
- 239000000498 cooling water Substances 0.000 claims description 10
- 230000007423 decrease Effects 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 5
- 230000001050 lubricating effect Effects 0.000 claims description 4
- 238000009987 spinning Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000007517 polishing process Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 244000137852 Petrea volubilis Species 0.000 description 4
- 239000000428 dust Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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
- B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
- B24B29/02—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
- B24B29/04—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces for rotationally symmetrical workpieces, e.g. ball-, cylinder- or cone-shaped 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
- 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
- B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant
Abstract
The invention discloses a kind of rolling burnishing devices and method for needle valve valve rod, including the first rolling roller unit, second rolling roller unit and third roll roller unit, first rolling roller unit, second rolling roller unit is in a left side, the right side is symmetrical arranged, first rolling roller unit, the gap for placing needle valve valve rod is provided between second rolling roller unit, first rolling roller unit, seaming roll in second rolling roller unit is along identical rotation, needle valve valve rod is driven to roll, third rolling roller unit is provided with right above gap, third rolls the height-adjustable of roller unit, after seaming roll in third rolling roller unit presses needle valve valve rod outer wall, the rotation direction that third rolls the seaming roll in roller unit is identical as needle valve valve rod rolling, realize that the rolling to needle valve valve rod polishes.The present invention is easy to use, and polishing efficiency is high, and the degree of automation is strong, has a good application prospect.
Description
Technical field
The present invention relates to needle valve component processing technical fields, and in particular to a kind of rolling polishing for needle valve valve rod
Device and method.
Background technique
Needle valve is a kind of valve that can accurately adjust, and purposes is wider, for example gas flame cuttiug is cut away from adjusting flame
The knob of temperature is exactly needle valve.Since the valve rod front end spool of needle valve is exactly a very sharp cone, as needle
It is inserted into valve seat, is thus gained the name, use is more universal, and demand is numerous.Since needle valve can be adjusted accurately, to its property
Can require it is relatively high, especially for the requirement of needle valve valve rod.
It is known that the opening and closing of needle valve are exactly the upper and lower activity using needle valve valve rod, band movable valve plug makes
The movement that spool and valve seat are sealed and open, Lai Shixian's.In order to reduce needle valve valve rod it is up and down during
Abrasion, needs to be processed by shot blasting needle valve valve rod, as shown in Figure 1, the polishing area A of needle valve valve rod, polishing area A
It with the airtight and watertight padding rotating contact of valve, plays a key effect to the sealing performance of needle valve, existing mode is to pass through sand paper
Hand polish one by one, efficiency is very low, time-consuming and laborious, moreover, polishing effect is bad, so that needle valve is being opened and closed
During closing, feel is heavier, wears greatly to airtight and watertight padding, there is certain sealing hidden danger.
Summary of the invention
The purpose of the present invention is overcome existing polish to needle valve valve rod to pass through the hand polish of sand paper one by one, efficiency ten
Divide lowly, and the problem that polishing effect is bad.Rolling burnishing device and method for needle valve valve rod of the invention, can make
The polishing area (sealing surfaces) of needle valve valve rod has obtained significantly performance raising, has pacified whole valve using effect more
Complete reliable and easy to use, polishing efficiency is high, and the degree of automation is strong, has a good application prospect.
In order to achieve the above object, the technical scheme adopted by the invention is that:
A kind of rolling burnishing device for needle valve valve rod, including the first rolling roller unit, the second rolling roller unit and third
Roller unit is rolled,
The first rolling roller unit, the second rolling roller unit are symmetrical arranged in left and right, the first rolling roller unit, second
The gap for placing needle valve valve rod is provided between rolling roller unit, the first rolling roller unit, second roll in roller unit
Seaming roll along identical rotation, drive needle valve valve rod to roll,
Third rolling roller unit is provided with right above the gap, the third rolls the height-adjustable of roller unit, described
Seaming roll after seaming roll in third rolling roller unit presses needle valve valve rod outer wall, in the third rolling roller unit
Rotation direction it is identical as needle valve valve rod rolling, realize and the rolling of needle valve valve rod polished.
It is previously described for the rolling burnishing device of needle valve valve rod, further includes cooling water pipe, the cooling water pipe face is put
Set the needle valve valve rod in gap.
It is previously described for the rolling burnishing device of needle valve valve rod, the seaming roll in the third rolling roller unit presses needle
Type valve valve rod outer wall, pressure 40Kg.
Be previously described for the rolling burnishing device of needle valve valve rod, the first rolling roller unit, the second rolling roller unit,
It includes seaming roll fixing seat, seaming roll that third, which rolls roller unit, and the front end of the seaming roll is provided with installation guide post, institute
It states installation guide post to be embedded in seaming roll fixing seat, the rear end of the seaming roll is connected with the driving electricity for driving its spinning
Machine.
It is previously described for the rolling burnishing device of needle valve valve rod, there are three drive shafts to distinguish for setting in the driving motor
It is drivingly connected with the seaming roll in the first rolling roller unit, the second rolling roller unit, third rolling roller unit, for realizing each rolling
Pressure roller rotates synchronously.
It is previously described for the rolling burnishing device of needle valve valve rod, the installation guide post is embedded in seaming roll fixing seat
It is interior, protection lubricating sleeve is provided between installation guide post in the seaming roll fixing seat.
It is previously described for the rolling burnishing device of needle valve valve rod, the gap is the half of needle valve valve rod radius.
It is previously described for the rolling burnishing device of needle valve valve rod, the first rolling roller unit, the second rolling roller unit
The revolving speed rotated synchronously with third rolling roller unit is 420r/min.
It is previously described for the rolling burnishing device of needle valve valve rod, the third rolling roller unit is controlled by hydraulic cylinder
Rising or decline.
A kind of rolling polishing method for needle valve valve rod, includes the following steps,
Step (A) is lubricated processing to multiple needle valve valve rods；
Step (B) opens driving motor, by the rolling in the first rolling roller unit, the second rolling roller unit, third rolling roller unit
Pressure roller rotates synchronously, revolving speed 420r/min, and opens cooling water pipe；
Step (C), by the needle valve valve rod after lubricated be put into the first rolling roller unit, second rolling roller unit in rolling
In gap between roller；
Step (D) controls third by hydraulic cylinder and rolls roller unit decline, and the seaming roll of third rolling roller unit is resisted needle
The outer wall of type valve valve rod, and apply the pressure of 40Kg；
Step (E), the first rolling roller unit, the second rolling roller unit, third roll the seaming roll of roller unit to needle valve valve rod
Rolling polishing is carried out, 8s is continued；
Step (F) controls third by hydraulic cylinder and rolls roller unit rising, the needle valve valve rod after taking out rolling polishing, and
It repeats step (C)-step (F), polishing treatment is rolled to next needle valve valve rod.
The beneficial effects of the present invention are: the rolling burnishing device and method for needle valve valve rod of the invention, can make
The polishing area (sealing surfaces) of needle valve valve rod has obtained significantly performance raising, has pacified whole valve using effect more
Complete reliable and easy to use, polishing efficiency is high, and the degree of automation is strong, and specific advantage is as follows:
(1) surface hardness of needle valve valve rod is promoted by original HRC26 to HRC35, and surface hardness, which increases, improves needle valve valve rod
Wearability；
(2) surface roughness of needle valve valve rod is reduced to 0.1 by original 0.4, keeps surface brighter and cleaner, improves needle valve valve rod
Leakproofness and reduce unlatching torsion；
(3) automation rolling polishing, is greatly lowered production cost, and improve production efficiency；
(4) conventional polishing process is polished, inefficiency using artificial sand paper, there is the influence of dust to human body, now safe and efficient
Improve productivity；
(5) the conventional polishing process time each about 2 minutes, now using of the invention, each about 10 seconds
It completes, greatly improves production efficiency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the rolling burnishing device for needle valve valve rod of the invention.
Attached meaning marked in the figure is as follows:
1: the first rolling roller unit；2: the second rolling roller units；3: third rolls roller unit；301: seaming roll fixing seat；302:
Seaming roll；303: installation guide post；304: protection lubricating sleeve；4: needle valve valve rod；5: gap；6: cooling water pipe.
Specific embodiment
Below in conjunction with Figure of description, the present invention is further illustrated.
As shown in Figure 1, the rolling burnishing device for needle valve valve rod of the invention, including the first rolling roller unit 1, the
Two rolling roller units 2 and third roll roller unit 3,
The first rolling roller unit 1, second rolls roller unit 2 and is symmetrical arranged in left and right, the first rolling roller unit 1, the
The gap 5 for placing needle valve valve rod 4, the first rolling roller unit 1, the second seaming roll are provided between two rolling roller units 2
Seaming roll in unit 2 drives needle valve valve rod 4 to roll along identical rotation,
The surface in the gap 5 is provided with third rolling roller unit 3, height-adjustable, the institute of the third rolling roller unit 3
It states after the seaming roll in third rolling roller unit 3 presses 4 outer wall of needle valve valve rod, in third rolling roller unit 3
The rotation direction of seaming roll rolls identical, rolling polishing of the realization to needle valve valve rod 4 with needle valve valve rod 4.
It preferably, further include cooling water pipe 6,6 face of cooling water pipe is placed on the needle valve valve rod 4 in gap 5, energy
It is enough to cool down to the seaming roll included in the first rolling roller unit 1, second rolling roller unit 2 and third rolling roller unit 3, to needle
Type valve valve rod 4 plays cooling effect in rolling polishing process, guarantees the performance of needle valve valve rod 4.
Preferably, the seaming roll in third rolling roller unit 3 presses 4 outer wall of needle valve valve rod, pressure 40Kg, no
It only can be improved the finish of 4 polishing area of needle valve valve rod, moreover it is possible to which the surface hardness for improving needle valve valve rod 4, which increases, improves valve
The wearability of bar.
Preferably, the first rolling roller unit 1, second rolls roller unit 2, third rolling roller unit 3 includes rolling
Roller fixing seat 301, seaming roll 302, the front end of the seaming roll 302 are provided with installation guide post 303, the installation guide post
303 are embedded in seaming roll fixing seat 301, and the rear end of the seaming roll 302 is connected with the driving motor for driving its spinning,
The driving motor is used to control the synchronous rotation of each seaming roll 302, and there are three drive shafts to distinguish for setting specially in driving motor
It is drivingly connected with the seaming roll 302 in the first rolling rolling of roller unit 1, second roller unit 2, third rolling roller unit 3, for real
Now each seaming roll 302 rotates synchronously.
Preferably, the installation guide post 303 is embedded in seaming roll fixing seat 301, in the seaming roll fixing seat 301
It is provided with protection lubricating sleeve 304 between installation guide post 303, can guarantee the effect of 302 autokinesis of seaming roll.
Preferably, the gap 5 is the half of 4 radius of needle valve valve rod, can guarantee needle valve valve rod 4 between being placed into
After gap 5, the upper surface of seaming roll is leaked out, when third rolling roller unit 3 pushes rolling polishing, guarantees needle valve valve rod 4
Roll polishing effect.
Preferably, the first rolling roller unit 1, second rolls roller unit 2 and third rolls what roller unit 3 rotated synchronously
Revolving speed is 420r/min, and speed operation rationally, guarantees the quality of rolling polishing needle valve valve rod 4, improves surface hardness and light
Cleanliness.
Preferably, rising or decline that the third rolling roller unit 3 is controlled by hydraulic cylinder, hydraulic cylinder driving
Facilitate control, guarantees that third rolling roller unit 3 applies the pressure of 40Kg to needle valve valve rod 4.
Rolling polishing method for needle valve valve rod of the invention, includes the following steps,
Step (A) is lubricated processing to multiple needle valve valve rods；
Step (B) opens driving motor, by the first rolling roller unit 1, second rolls roller unit 2, third rolls in roller unit 3
Seaming roll 302 rotate synchronously, revolving speed 420r/min, and open cooling water pipe 6；
Needle valve valve rod after lubricated is put into the rolling in the first rolling roller unit 1, second rolling roller unit 2 by step (C)
In gap 5 between pressure roller 302；
Step (D) controls third by hydraulic cylinder and rolls the decline of roller unit 3, by the seaming roll 302 of third rolling roller unit 3
The outer wall of needle valve valve rod is resisted, and applies the pressure of 40Kg；
Step (E), the first rolling roller unit 1, second roll the seaming roll 302 of roller unit 2, third rolling roller unit 3 to needle-like
Valve valve rod carries out rolling polishing, continues 8s；
Step (F) controls third by hydraulic cylinder and rolls the rising of roller unit 3, the needle valve valve rod after taking out rolling polishing, and
It repeats step (C)-step (F), polishing treatment is rolled to next needle valve valve rod.
In conclusion the rolling burnishing device and method for needle valve valve rod of the invention, easy to operate, needle can be made
The polishing area (sealing surfaces) of type valve valve rod has obtained significantly performance raising, has kept whole valve using effect safer
Reliably, and easy to use, polishing efficiency is high, and the degree of automation is strong, and specific advantage is as follows:
(1) surface hardness of needle valve valve rod is promoted by original HRC26 to HRC35, and surface hardness, which increases, improves needle valve valve rod
Wearability；
(2) surface roughness of needle valve valve rod is reduced to 0.1 by original 0.4, keeps surface brighter and cleaner, improves needle valve valve rod
Leakproofness and reduce unlatching torsion；
(3) automation rolling polishing, is greatly lowered production cost, and improve production efficiency；
(4) conventional polishing process is polished, inefficiency using artificial sand paper, there is the influence of dust to human body, now safe and efficient
Improve productivity；
(5) the conventional polishing process time each about 2 minutes, now using of the invention, each about 10 seconds
It completes, greatly improves production efficiency.
Basic principles and main features and advantage of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (10)
1. a kind of rolling burnishing device for needle valve valve rod, it is characterised in that: including the first rolling roller unit (1), second
Roller unit (2) and third rolling roller unit (3) are rolled,
First rolling roller unit (1), the second rolling roller unit (2) are symmetrical arranged in left and right, the first rolling roller unit
(1), the gap (5) for placing needle valve valve rod (4), the first rolling roller unit are provided between the second rolling roller unit (2)
(1), the seaming roll in the second rolling roller unit (2) drives needle valve valve rod (4) to roll along identical rotation,
Third rolling roller unit (3) is provided with right above the gap (5), the height of third rolling roller unit (3) can
It adjusts, after the seaming roll in third rolling roller unit (3) presses needle valve valve rod (4) outer wall, the third rolling
The rotation direction of seaming roll in roller unit (3) is identical as (4) rolling of needle valve valve rod, realizes the rolling to needle valve valve rod (4)
Pressure polishing.
2. the rolling burnishing device according to claim 1 for needle valve valve rod, it is characterised in that: further include cooling water
It manages (6), cooling water pipe (6) face is placed on the needle valve valve rod (4) in gap (5).
3. the rolling burnishing device according to claim 1 for needle valve valve rod, it is characterised in that: the third rolling
Seaming roll in roller unit (3) presses needle valve valve rod (4) outer wall, pressure 40Kg.
4. the rolling burnishing device according to claim 1 for needle valve valve rod, it is characterised in that: first rolling
Roller unit (1), the second rolling roller unit (2), third rolling roller unit (3) include seaming roll fixing seat (301), seaming roll
(302), the front end of the seaming roll (302) is provided with installation guide post (303), and the installation guide post (303) is embedded
In seaming roll fixing seat (301), the rear end of the seaming roll (302) is connected with the driving motor for driving its spinning.
5. the rolling burnishing device according to claim 4 for needle valve valve rod, it is characterised in that: the driving motor
There are three drive shafts to roll roller unit (3) with the first rolling roller unit (1), the second rolling roller unit (2), third respectively for interior setting
Interior seaming roll (302) is drivingly connected, for realizing each seaming roll (302) synchronous rotation.
6. the rolling burnishing device according to claim 4 for needle valve valve rod, it is characterised in that: the installation guiding
Column (303) is embedded in seaming roll fixing seat (301), in the seaming roll fixing seat (301) between installation guide post (303)
It is provided with protection lubricating sleeve (304).
7. the rolling burnishing device according to claim 1 for needle valve valve rod, it is characterised in that: the gap (5)
For the half of needle valve valve rod (4) radius.
8. the rolling burnishing device according to claim 5 for needle valve valve rod, it is characterised in that: first rolling
The revolving speed that roller unit (1), the second rolling roller unit (2) and third rolling roller unit (3) rotate synchronously is 420r/min.
9. the rolling burnishing device according to claim 1 for needle valve valve rod, it is characterised in that: the third rolling
The rising or decline that roller unit (3) is controlled by hydraulic cylinder.
10. a kind of rolling polishing method for needle valve valve rod, it is characterised in that: include the following steps,
Step (A) is lubricated processing to multiple needle valve valve rods；
Step (B) opens driving motor, rolls roller unit (1), the second rolling roller unit (2), third rolling roller unit for first
(3) seaming roll (302) in rotates synchronously, revolving speed 420r/min, and opens cooling water pipe (6)；
Step (C), by the needle valve valve rod after lubricated be put into the first rolling roller unit (1), second rolling roller unit (2) in
Seaming roll (302) between gap (5) in；
Step (D) controls third rolling roller unit (3) decline by hydraulic cylinder, by the seaming roll of third rolling roller unit (3)
(302) outer wall of needle valve valve rod is resisted, and applies the pressure of 40Kg；
Step (E), first rolls the seaming roll of roller unit (1), the second rolling roller unit (2), third rolling roller unit (3)
(302) rolling polishing is carried out to needle valve valve rod, continues 8s；
Step (F) controls third rolling roller unit (3) by hydraulic cylinder and rises, the needle valve valve rod after taking out rolling polishing,
And step (C)-step (F) is repeated, polishing treatment is rolled to next needle valve valve rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910586402.7A CN110216575A (en) | 2019-07-01 | 2019-07-01 | A kind of rolling burnishing device and method for needle valve valve rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910586402.7A CN110216575A (en) | 2019-07-01 | 2019-07-01 | A kind of rolling burnishing device and method for needle valve valve rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110216575A true CN110216575A (en) | 2019-09-10 |
Family
ID=67815721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910586402.7A Pending CN110216575A (en) | 2019-07-01 | 2019-07-01 | A kind of rolling burnishing device and method for needle valve valve rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110216575A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB188209A (en) * | 1921-11-15 | 1922-11-09 | Krupp Ag | Improvements in pressure roller smoothing apparatus for circular objects, particularly axle-journals |
| GB705793A (en) * | 1951-04-23 | 1954-03-17 | Fur Unternehmungen Der Eisen U | A burnishing device with three or more burnishing rollers for use on a lathe |
| GB2065005A (en) * | 1979-10-11 | 1981-06-24 | Ingenious Devices Ltd | Centreless valve grinding |
| JP2004090175A (en) * | 2002-08-30 | 2004-03-25 | Citizen Watch Co Ltd | Burnishing device, automatic lathe loaded with burnishing device and burnishing method using automatic lathe |
| JP2006021258A (en) * | 2004-07-06 | 2006-01-26 | Denso Corp | Roller varnishing tool |
| CN203578112U (en) * | 2013-07-10 | 2014-05-07 | 如皋透平叶片制造有限公司 | Valve rod smoothness treatment device |
| CN108326719A (en) * | 2017-12-29 | 2018-07-27 | 合肥信比欣新材料有限公司 | A kind of efficient burnishing device convenient for fixed environment-friendly materials |
| CN210255661U (en) * | 2019-07-01 | 2020-04-07 | 江苏华太电力仪表有限公司 | Rolling polishing device for needle valve rod |
-
2019
- 2019-07-01 CN CN201910586402.7A patent/CN110216575A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB188209A (en) * | 1921-11-15 | 1922-11-09 | Krupp Ag | Improvements in pressure roller smoothing apparatus for circular objects, particularly axle-journals |
| GB705793A (en) * | 1951-04-23 | 1954-03-17 | Fur Unternehmungen Der Eisen U | A burnishing device with three or more burnishing rollers for use on a lathe |
| GB2065005A (en) * | 1979-10-11 | 1981-06-24 | Ingenious Devices Ltd | Centreless valve grinding |
| JP2004090175A (en) * | 2002-08-30 | 2004-03-25 | Citizen Watch Co Ltd | Burnishing device, automatic lathe loaded with burnishing device and burnishing method using automatic lathe |
| JP2006021258A (en) * | 2004-07-06 | 2006-01-26 | Denso Corp | Roller varnishing tool |
| CN203578112U (en) * | 2013-07-10 | 2014-05-07 | 如皋透平叶片制造有限公司 | Valve rod smoothness treatment device |
| CN108326719A (en) * | 2017-12-29 | 2018-07-27 | 合肥信比欣新材料有限公司 | A kind of efficient burnishing device convenient for fixed environment-friendly materials |
| CN210255661U (en) * | 2019-07-01 | 2020-04-07 | 江苏华太电力仪表有限公司 | Rolling polishing device for needle valve rod |
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