CN109366346A - The hydraulic pulldown of Vertical Steel ball machine - Google Patents
The hydraulic pulldown of Vertical Steel ball machine Download PDFInfo
- Publication number
- CN109366346A CN109366346A CN201811598419.6A CN201811598419A CN109366346A CN 109366346 A CN109366346 A CN 109366346A CN 201811598419 A CN201811598419 A CN 201811598419A CN 109366346 A CN109366346 A CN 109366346A
- Authority
- CN
- China
- Prior art keywords
- steel ball
- lock block
- lower lock
- block
- hydraulic
- 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
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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
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/02—Lapping machines or devices; Accessories designed for working surfaces of revolution
- B24B37/025—Lapping machines or devices; Accessories designed for working surfaces of revolution designed for working spherical surfaces
-
- 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
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/005—Control means for lapping machines or devices
-
- 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
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/34—Accessories
Abstract
The present invention provides a kind of hydraulic pulldowns of Vertical Steel ball machine, including column, crossbeam, hydraulic cylinder, telescopic rod, upper millstone, connecting plate, lower lock block and upper holder block, the present invention is to provide lower pressure power by hydraulic device for the upper millstone of Vertical Steel ball machine, simultaneously, gravitational equilibrium tension spring is set, upper millstone gravity is balanced using tension spring, upper millstone is set to press to steel ball blanks under near-zero gravitational conditions, pressure sensor is set simultaneously, the oil inlet of force control hydraulic pressure device or oil return detected using pressure sensor, to adjust the pressure that steel ball blanks are born, to avoid steel ball blanks from being crushed, guarantee yield rate, reduce waste of raw materials, reduce production cost.
Description
Technical field:
The invention belongs to bearing ball technical field of processing equipment, and in particular to a kind of hydraulic pulldown of Vertical Steel ball machine.
Background technique:
Vertical (light grinds, grinds) steel ball machine is at present both at home and abroad for the important of the rolling elements such as steel ball, Ceramic Balls, baton round processing
Equipment, is widely used in the manufacturers such as bearing enterprise, professional rolling element, and Vertical Steel ball machine is usually the phase by upper lower millstone
Rotation is achieved the purpose that grind steel ball, for steel ball to be ground between upper lower millstone, upper millstone passes through pressurizing device pressure
To steel ball, but the pressure of existing Vertical Steel ball machine its pressurizing device when in use is uncontrolled, and steel ball is bearing pressurization dress
While setting the pressure of application, there are also the gravity for bearing pressurizing device itself, moreover, steel ball blanks accurate size itself, error
Range is larger, and when upper millstone is pressed on steel ball by pressurizing device, the steel ball blanks being relatively large in diameter are first subject to pressure, leads to steel
Ball blank unbalance stress, therefore, Vertical Steel ball machine usually have in actual use part steel ball because bear pressure it is excessive due to by
Crushing, especially in milled ceramic ball or baton round, it is very common that sphere is crushed phenomenon, causes yield rate low, raw material
Waste is serious.
Summary of the invention
In conclusion the present invention provides a kind of the hydraulic of Vertical Steel ball machine in order to overcome the shortcomings of prior art problem
Pressurizing device, it be provide lower pressure power by hydraulic device for the upper millstone of Vertical Steel ball machine, meanwhile, setting gravitational equilibrium draw
Spring balances upper millstone gravity using tension spring, so that upper millstone is pressed to steel ball blanks under near-zero gravitational conditions, while pressure is arranged
Sensor, the oil inlet of force control hydraulic pressure device or oil return detected using pressure sensor, is born to adjust steel ball blanks
Pressure guarantee yield rate so that steel ball blanks be avoided to be crushed, reduce waste of raw materials, reduce production cost.
In order to solve the above technical problems, the technical scheme of the present invention is realized as follows:
A kind of hydraulic pulldown of Vertical Steel ball machine, in which: including column, crossbeam, hydraulic cylinder, telescopic rod, upper millstone, connection
Plate, lower lock block and upper holder block, the column lower end are connect with the rack of Vertical Steel ball machine, and the top of the column is provided with
Crossbeam is provided with hydraulic cylinder on the crossbeam, upper holder block, the hydraulic cylinder is provided on the telescopic rod of the hydraulic cylinder
The lower part of telescopic rod be provided with lower lock block, lower lock block is located at the lower section of upper holder block, and between existing between upper holder block and lower lock block
Gap is provided with guide rod between lower lock block and upper holder block, the lower part of the guide rod is threadedly coupled with lower lock block, and described leads
It is installed in the pilot hole on upper holder block to the top of bar, the threaded upper ends of the guide rod are connected with balance nut, described
Balance nut upper holder block is connected by balance pull-spring, the connecting plate upper end is provided with sliding sleeve, and the lower lock block is located at
In sliding sleeve, pressure sensor is provided on the connecting plate, pressure sensor is located in sliding sleeve, and pressure sensor and pushing
The bottom surface of block is corresponding, and the lower end of the connecting plate is provided with upper millstone, and the telescopic rod that Hydraulic Balancing Circuit controls hydraulic cylinder is dynamic
Make.
Technical solution of the present invention may also is that realization: ladder open-work is provided in the lower lock block, it is hydraulic
The lower part of the telescopic rod of cylinder is installed in the ladder open-work of lower lock block, and the lower end of the telescopic rod is provided with stop nut, institute
The stop nut stated is located in ladder open-work, and hush panel is arranged in the lower end of the lower lock block, and hush panel is arranged in ladder open-work
Lower ending opening on, hush panel corresponding pressure sensor.
Technical solution of the present invention may also is that realization: the quantity of the guide rod is multiple, multiple guiding
Bar is circumferentially uniformly distributed on lower lock block, and the upper end of each guide rod is provided with balance nut, and balance nut passes through balance
Tension spring connects upper holder block.
Technical solution of the present invention may also is that realization: the lower part of the telescopic rod is tapered portion, tapered portion
It is provided with connection sliding sleeve outside, after telescopic rod is installed in the ladder open-work of lower lock block, connection sliding sleeve is located at telescopic rod and lower lock block
Ladder open-work between.
Technical solution of the present invention may also is that realization: the sliding sleeve upper end is provided with annular stop plate, institute
Keyway is provided on the sliding sleeve inner wall stated, the lower lock block and sliding sleeve pass through the key connection being vertically arranged.
The invention has the benefit that
The present invention be provide lower pressure power by hydraulic device for the upper millstone of Vertical Steel ball machine, meanwhile, setting gravitational equilibrium draw
Spring balances upper millstone gravity using tension spring, so that upper millstone is pressed to steel ball blanks under near-zero gravitational conditions, while pressure is arranged
Sensor, the oil inlet of force control hydraulic pressure device or oil return detected using pressure sensor, is born to adjust steel ball blanks
Pressure guarantee yield rate so that steel ball blanks be avoided to be crushed, reduce waste of raw materials, reduce production cost.
Detailed description of the invention:
Fig. 1 is the structural diagram of the present invention
Column 1；Crossbeam 2；Hydraulic cylinder 3；Telescopic rod 4；Upper millstone 5；Connecting plate 6；Lower lock block 7；Upper holder block 8；Guide rod 9；Balance
Nut 10；Balance pull-spring 11；Sliding sleeve 12；Pressure sensor 13；Stop nut 14；Hush panel 15；Connect sliding sleeve 16.
Fig. 2 is the schematic diagram of Hydraulic Balancing Circuit of the invention
Fuel tank 17；Filter 18；Main oil pump 19；Auxiliary oil pump 20；Main reversing valve 21；Auxiliary reversal valve 22；Main oil pipe 23；First is unidirectional
Valve 24；Main oil inlet pipe 25；Second one-way valve 26；Oil return pipe 27；Auxiliary oil pipe 28；Third check valve 29；First throttle valve 30；It is auxiliary into
Oil pipe 31；Second throttle 32；First overflow valve 33；Oil distributing pipe 34；Separating valve 35；Second overflow valve 36；Third overflow valve 37；
4th overflow valve 38；Flowline 39；First pressure gauge 40；Second pressure gauge 41；Third pressure gauge 42.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing.
As shown in Figure 1, a kind of hydraulic pulldown of Vertical Steel ball machine, including column 1, crossbeam 2, hydraulic cylinder 3, telescopic rod
4, upper millstone 5, connecting plate 6, lower lock block 7 and upper holder block 8,1 lower end of column is connect with the rack of Vertical Steel ball machine, described
The top of column 1 be provided with crossbeam 2, hydraulic cylinder 3 is provided on the crossbeam 2, on the telescopic rod 4 of the hydraulic cylinder 3
It is provided with upper holder block 8, the lower part of the telescopic rod 4 of the hydraulic cylinder 3 is provided with lower lock block 7, and lower lock block 7 is located at upper holder block 8
Lower section, and there are gaps between upper holder block 8 and lower lock block 7, and guide rod 9 is provided between lower lock block 7 and upper holder block 8, it is described
The lower part of guide rod 9 is threadedly coupled with lower lock block 7, and the top of the guide rod 9 is installed in the pilot hole on upper holder block 8,
The threaded upper ends of the guide rod 9 are connected with balance nut 10, and the balance nut 10 passes through in the connection of balance pull-spring 11
Briquetting 8, the quantity of guide rod 9 be it is multiple, multiple guide rods 9 are circumferentially uniformly distributed on lower lock block 7, each guide rod 9
Upper end is provided with balance nut 10, and balance nut 10 connects upper holder block 8 by balance pull-spring 11.
6 upper end of connecting plate is provided with sliding sleeve 12, and the lower lock block 7 is located in sliding sleeve 12, and 12 upper end of sliding sleeve is set
It is equipped with annular stop plate, keyway is provided on 12 inner wall of sliding sleeve, the lower lock block 7 is with sliding sleeve 12 by being vertically arranged
Key connection.Pressure sensor 13 is provided on the connecting plate 6, pressure sensor 13 is located in sliding sleeve 12, and pressure passes
Sensor 13 is corresponding with the bottom surface of lower lock block 7, and the lower end of the connecting plate 6 is provided with upper millstone 5, and Hydraulic Balancing Circuit controls liquid
The telescopic rod 4 of cylinder pressure 3 acts.
Ladder open-work is provided in lower lock block 7, the lower part of the telescopic rod 4 of hydraulic cylinder 3 is installed on the ladder open-work of lower lock block 7
Interior, the lower end of the telescopic rod 4 is provided with stop nut 14, and the stop nut 14 is located in ladder open-work, described
Hush panel 15 is arranged in the lower end of lower lock block 7, and hush panel 15 is arranged on the lower ending opening of ladder open-work, 15 corresponding pressure of hush panel
Sensor 13.The lower part of telescopic rod 4 is tapered portion, and connection sliding sleeve 16 is provided with outside tapered portion, and telescopic rod 4 is installed on lower lock block 7
Ladder open-work in after, connection sliding sleeve 16 be located between telescopic rod 4 and the ladder open-work of lower lock block 7.
As shown in Fig. 2, the Hydraulic Balancing Circuit includes fuel tank 17, filter 18, main oil pump 19, auxiliary oil pump 20, master
Reversal valve 21 and auxiliary reversal valve 22, the fuel tank 17 connect filter 18 by oil pipe, and filter 18 is connected respectively by oil pipe
Logical main oil pump 19 and auxiliary oil pump 20, the main oil pump 19 are connected to main reversing valve 21 by main oil pipe 23, are arranged on main oil pipe 23
There is the first check valve 24, the main reversing valve 21 is three position four-way electromagnetic valve, and the P mouth of the main reversing valve 21 is connected to main oil
Pipe 23, the A mouth connection of main reversing valve 21 pass through the oil inlet of 25 hydraulic cylinder 3 of main oil inlet pipe, are provided with second in main oil inlet pipe 25
Check valve 26, the oil return opening of the B mouth connection hydraulic cylinder 3 of main reversing valve 21, the T mouth of main reversing valve 21 are connected to oil by oil return pipe 27
Case 17, when the spool of the main reversing valve 21 is located at leftward position, the P mouth of main reversing valve 21 is connected to A mouthfuls, B mouthfuls and T mouthfuls of companies
It is logical；When the spool of main reversing valve 21 is centrally located, the P mouth of main reversing valve 21 is connected to A mouthfuls and T mouthfuls, B mouthfuls of closings；Master changes
When being located at right positions to the spool of valve 21, the P mouth of main reversing valve 21 is connected to B mouthfuls, and A mouthfuls are connected to T mouthfuls；The auxiliary oil pump
20 are connected to auxiliary reversal valve 22 by auxiliary oil pipe 28, and third check valve 29 and first throttle valve 30 are provided on auxiliary oil pipe 28, described
Auxiliary reversal valve 22 be three position four-way electromagnetic valve, the auxiliary oil pipe 28 of P mouth connection of the auxiliary reversal valve 22, the auxiliary reversal valve
22 A mouth is normally closed, and the B mouth of auxiliary reversal valve 22 is connected to main oil inlet pipe 25 by auxiliary oil inlet pipe 31, sets on the auxiliary oil inlet pipe 31
It is equipped with second throttle 32, the T mouth connection oil return pipe 27 of the auxiliary reversal valve 22, the spool of the auxiliary reversal valve 22 is located at
When leftward position, the P mouth of auxiliary reversal valve 22 is connected to A mouthfuls, and B mouthfuls are connected to T mouthfuls；The spool of auxiliary reversal valve 22 is centrally located
When, the P mouth of auxiliary reversal valve 22, T mouthfuls, A mouthfuls, B mouthfuls be all closed；When the spool of auxiliary reversal valve 22 is located at right positions, auxiliary reversal valve
22 P mouth is connected to B mouthfuls, and A mouthfuls are connected to T mouthfuls.
The first overflow valve 33 is provided on the main oil pipe 23, main oil pipe 23 connects oil return pipe by the first overflow valve 33
27。
Auxiliary oil pipe 28 between first throttle valve 30 and auxiliary reversal valve 22 connects oil distributing pipe 34, and the oil distributing pipe 34 is connected to
Separating valve 35, the separating valve 35 are two position three way directional control valve, and the oil inlet of separating valve 35 is connected to oil distributing pipe 34, separating valve 35
Two oil outlets in two the second overflow valves 36 being arranged in parallel of a connection, another oil outlet of separating valve 35 is normal
It closes, the second overflow valve 36 is connected to separating valve 35 and fuel tank 17.
Auxiliary oil pipe 28 between third check valve 29 and first throttle valve 30 is connected with third overflow valve 37, third overflow valve
The auxiliary oil pipe 28 of 37 connections and fuel tank 17.
It is provided with second pressure gauge 41 on the auxiliary oil pipe 28, is provided with first pressure gauge in the main oil inlet pipe 25
40, third pressure gauge 42 is provided on the flowline 39.The oil return pipe 27 is connected fuel-displaced by the 4th overflow valve 38
Pipe 39.
In use, starting main oil pump 19, auxiliary oil pump 20 and main reversing valve 21, the spool of main reversing valve 21 are located at left lateral position
It sets, then, the hydraulic oil in fuel tank 17 is sent into hydraulic cylinder 3 by main oil pump 19, and the telescopic rod 4 of hydraulic cylinder 3 extends downwardly, to drive
Upper holder block 8 and lower lock block 7 move down, 7 contact pressure sensor 13 of lower lock block, and pressure sensor 13 detects pressure, lower lock block 7
Connecting plate 6 and upper millstone 5 is pushed to move down, upper millstone 5 presses to steel ball blank, after upper millstone 5 and the contact of steel ball blank, on
Mill 5 and connecting plate 6 be not in movement, since there are gap, then lower lock block 7 is in movement between upper holder block 8 and lower lock block 7, on
Briquetting 8 continues to move down, and due to the presence of guide rod 9 and balance nut 10, upper holder block 8 pulls balance pull-spring 11, balancing
Under the elastic force effect of tension spring 11, the self gravity of upper holder block 8 and lower lock block 7 is balanced, itself weight of upper holder block 8 and lower lock block 7
Power is not transferred to steel ball blank, and the pressure acted on steel ball blank is the gravity of connecting plate 6 and upper millstone 5, to mitigate
The pressure that steel ball blank is born, avoids steel ball blank from being crushed, the pressure that pressure sensor 13 can will test passes to Vertical Steel
The control system of ball machine, control system controls main reversing valve 21 according to the pressure and auxiliary reversal valve 22 commutates.Work as pressure sensor
When the pressure detected reaches setting value, main reversing valve 21 commutates, and the spool of main reversing valve 21 is centrally located, at this point, liquid
3 pressure maintaining of cylinder pressure, auxiliary reversal valve 22 commutate, and the spool of auxiliary reversal valve 22 is located at leftward position, at this time the lower millstone of steel ball machine and on
Mill 5 grinds steel ball, and lower millstone rotation, upper millstone 5 is in quick condition, that is, the lower millstone upper and lower position of steel ball machine
It is motionless, plane lapping rotation is done, upper millstone 5 floats, and steel ball blanks are between upper millstone 5 and lower millstone, due to steel ball blanks
Diameter is different, then will push upper millstone 5 and float up and down, and when upper millstone 5 floats upwards, the piston rod of hydraulic cylinder 3 is upper
The lower retraction of the effect of mill 5, so that the hydraulic oil in hydraulic cylinder 3 be made to flow through second throttle 32 and auxiliary reversal valve from auxiliary oil inlet pipe 31
22, then fuel tank 17 is flowed back to through oil return pipe 27, and when the floating downwards of upper millstone 5, the piston rod of hydraulic cylinder 3 is under the effect of upper millstone 5
It stretches out, hydraulic oil enters through main oil inlet pipe 25 and second one-way valve 26, extends downwardly the piston rod of hydraulic cylinder 3, so realizes
Upper millstone 5 of the upper millstone 5 when grinding steel ball float up and down and hydraulic cylinder 3 in oil pressure balance.
When steel ball grinding finishes, and needs pressure release, main reversing valve 21 commutates, and the spool of main reversing valve 21 is located at right lateral position
It sets, then hydraulic oil enters hydraulic cylinder 3 through flowline 39, flows out through main oil inlet pipe 25, realizes the retraction of 3 telescopic rod 4 of hydraulic cylinder.
Main reversing valve 21 is in state of pressure keeping, when pressure sensor 13 detects that pressure is greater than the set value, starts auxiliary change
To valve 22, the spool of auxiliary reversal valve 22 is located at leftward position, can release stress from main oil inlet pipe 25 through second throttle 32, make liquid
The telescopic rod 4 of cylinder pressure 3 suitably bounces back, and eases off the pressure, steel ball is avoided to be crushed.When the pressure value that pressure sensor 13 detects is small
When setting value, auxiliary reversal valve 22 commutates, and the spool of auxiliary reversal valve 22 is located at right positions, at this time can be by auxiliary oil pump 20 to liquid
The main oil inlet pipe 25 of cylinder pressure 3 supplements hydraulic oil, appropriate adherence pressure, since first segment is arranged on auxiliary oil pipe 28 and auxiliary oil inlet pipe 31
Valve 30 and second throttle 32 are flowed, then slowly small adjusting pressure can be achieved.
It should be noted that embodiment described above is the affiliated technology to the illustrative and not limiting of technical solution of the present invention
The equivalent replacement of field those of ordinary skill or the other modifications made according to the prior art, as long as not exceeding the technology of the present invention
The thinking and range of scheme, should be included within interest field of the presently claimed invention.
Claims (5)
1. a kind of hydraulic pulldown of Vertical Steel ball machine, it is characterised in that: including column (1), crossbeam (2), hydraulic cylinder (3),
Telescopic rod (4), upper millstone (5), connecting plate (6), lower lock block (7) and upper holder block (8), the column (1) lower end and Vertical Steel
The rack of ball machine connects, and the top of the column (1) is provided with crossbeam (2), and the crossbeam is provided with hydraulic cylinder on (2)
(3), it is provided with upper holder block (8) on the telescopic rod (4) of the hydraulic cylinder (3), the telescopic rod (4) of the hydraulic cylinder (3)
Lower part is provided with lower lock block (7), and lower lock block (7) is located at the lower section of upper holder block (8), and deposits between upper holder block (8) and lower lock block (7)
It in gap, is provided between lower lock block (7) and upper holder block (8) guide rod (9), the lower part of the guide rod (9) and lower lock block
(7) it is threadedly coupled, the top of the guide rod (9) is installed in the pilot hole on upper holder block (8), the guide rod (9)
Threaded upper ends be connected with balance nut (10), the balance nut (10) by balance pull-spring (11) connection upper holder block (8),
Described connecting plate (6) upper end is provided with sliding sleeve (12), and the lower lock block (7) is located in sliding sleeve (12), the connecting plate
(6) it is provided on pressure sensor (13), pressure sensor (13) is located in sliding sleeve (12), and pressure sensor (13) and pushing
The bottom surface of block (7) is corresponding, and the lower end of the connecting plate (6) is provided with upper millstone (5), and Hydraulic Balancing Circuit controls hydraulic cylinder
(3) telescopic rod (4) movement.
2. the hydraulic pulldown of Vertical Steel ball machine according to claim 1, it is characterised in that: the lower lock block (7)
It is inside provided with ladder open-work, the lower part of the telescopic rod (4) of hydraulic cylinder (3) is installed in the ladder open-work of lower lock block (7), described
The lower end of telescopic rod (4) is provided with stop nut (14), and the stop nut (14) is located in ladder open-work, the pushing
Hush panel (15) are arranged in the lower end of block (7), and hush panel (15) is arranged on the lower ending opening of ladder open-work, and hush panel (15) is corresponding
Pressure sensor (13).
3. the hydraulic pulldown of Vertical Steel ball machine according to claim 1, it is characterised in that: the guide rod (9)
Quantity be it is multiple, multiple guide rods (9) are circumferentially uniformly distributed on lower lock block (7), and the upper end of each guide rod (9) is all provided with
It is equipped with balance nut (10), balance nut (10) passes through balance pull-spring (11) connection upper holder block (8).
4. the hydraulic pulldown of Vertical Steel ball machine according to claim 1, it is characterised in that: the telescopic rod (4)
Lower part be tapered portion, connection sliding sleeve (16) is provided with outside tapered portion, telescopic rod (4) is installed on the ladder open-work of lower lock block (7)
After interior, connection sliding sleeve (16) is located between telescopic rod (4) and the ladder open-work of lower lock block (7).
5. the hydraulic pulldown of Vertical Steel ball machine according to claim 1, it is characterised in that: on the sliding sleeve (12)
End is provided with annular stop plate, and keyway is provided on the sliding sleeve (12) inner wall, and the lower lock block (7) and sliding sleeve (12) are logical
Cross the key connection being vertically arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811598419.6A CN109366346A (en) | 2018-12-26 | 2018-12-26 | The hydraulic pulldown of Vertical Steel ball machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811598419.6A CN109366346A (en) | 2018-12-26 | 2018-12-26 | The hydraulic pulldown of Vertical Steel ball machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109366346A true CN109366346A (en) | 2019-02-22 |
Family
ID=65371671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811598419.6A Pending CN109366346A (en) | 2018-12-26 | 2018-12-26 | The hydraulic pulldown of Vertical Steel ball machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109366346A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110552674A (en) * | 2019-08-19 | 2019-12-10 | 河南工程学院 | true triaxial contains microorganism coal body fracturing experimental apparatus |
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| CN207710439U (en) * | 2017-12-20 | 2018-08-10 | 中建材衢州金格兰石英有限公司 | A kind of cylindrical grinder of quartz glass |
| CN209175513U (en) * | 2018-12-26 | 2019-07-30 | 新乡市至德精密设备有限公司 | The hydraulic pulldown of Vertical Steel ball machine |
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| JP2000346012A (en) * | 1999-06-04 | 2000-12-12 | Oil Drive Kogyo Kk | Hydraulic cylinder and hydraulic device using thereof |
| JP2000354955A (en) * | 1999-06-10 | 2000-12-26 | Nsk Ltd | Polishing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110552674A (en) * | 2019-08-19 | 2019-12-10 | 河南工程学院 | true triaxial contains microorganism coal body fracturing experimental apparatus |
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