CN1958234A - Compound control system for forcing down grinding wheel of sharpening machine for copper billet at constant pressure and at constant power - Google Patents
Compound control system for forcing down grinding wheel of sharpening machine for copper billet at constant pressure and at constant power Download PDFInfo
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- CN1958234A CN1958234A CNA2006101530848A CN200610153084A CN1958234A CN 1958234 A CN1958234 A CN 1958234A CN A2006101530848 A CNA2006101530848 A CN A2006101530848A CN 200610153084 A CN200610153084 A CN 200610153084A CN 1958234 A CN1958234 A CN 1958234A
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Abstract
A constant-pressure and -power control system for pressing abrasive disc downward to grind steel bellite is composed of a loading unit with a master motor for driving abrasive disc, a hydraulic unit for controlling the pressing down of abrasive disc and with a motor having the frequency-varying speed regulation, and a control unit for controlling the output power of master motor. The pressing-down force of abrasive disc is controlled by three-way proportional valve to release pressure.
Description
One, technical field
The invention belongs to sharpening machine for copper billet, be specifically related to a kind of grinding wheel of sharpening machine for copper billet and depress constant pressure and constant power multiplex control system.
Two, background technology
At present, the sharpening machine for copper billet of producing is depressed the control pressurer system that Force control system adopts servo valve to load more both at home and abroad, the control pressurer system that adopts electricity liquid ratio relief valve to load is also arranged, but these two kinds of loading systems comes with some shortcomings all.The actual use shows that proportional pressure control valve loads, and influenced by the characteristic of valve own and load chamber, and system dynamic characteristic is relatively poor relatively, can not satisfy the followability requirement, and use servo valve to load, it is complicated that system forms, cost requires harshness than higher to environment for use, safeguards relatively difficulty.In addition, inertia force is all bigger to the influence of depressing power in the present employed system, and does not all have compensation.
Three, summary of the invention:
1, problem to be solved by this invention is: provide a kind of grinding wheel of sharpening machine for copper billet to depress constant pressure and constant power multiplex control system, control the power of depressing of grinding wheel of sharpening machine for copper billet better, improve the lumber recovery of steel billet and improve grinding efficiency.
2, the technical solution used in the present invention is: a kind of grinding wheel of sharpening machine for copper billet is depressed constant pressure and constant power multiplex control system, it comprises charger, hydraulic means and control device, charger is by main motor 1, grinding carriage 2, support 3, rotating shaft 4, hydraulic cylinder 5, belt pulley 6, belt 7, form with emery wheel 8, main motor 1 and emery wheel 8 are installed on the grinding carriage 2, main motor 1 is connected with emery wheel 8 by belt pulley 6 and belt 7, grinding carriage 2 is fixed on the support 3 by rotating shaft 4, hydraulic cylinder 5 one ends are fixed on the support 3, the other end links to each other with grinding carriage 2, and power sensor 9 is connected with main motor 1; Hydraulic means is made up of hydraulic cylinder 5, hydraulic pump 10, motor 11, frequency converter 12, electromagnetic relief valve 13, first sensor 14, accumulator 15, threeway proportional pressure-reducing valve 16, second sensor 17, the 3rd sensor 18, one-way throttle valve 19, three position four-way directional control valve 20 and fuel tank 21, hydraulic pump 10 is connected with motor 11, motor 11 is connected with frequency converter 12, hydraulic pump 10 outlet Pp by pipeline respectively with the pressure hydraulic fluid port P of accumulator 15, electromagnetic relief valve 13 and three position four-way directional control valve 20
1Connect, the outlet A of three position four-way directional control valve 20, B mouth are connected with an end of threeway proportional pressure-reducing valve 16 and one-way throttle valve 19 respectively, and the other end of one-way throttle valve 19 is by the cavity volume p of pipeline and hydraulic cylinder 5
BConnect, threeway proportional pressure-reducing valve 16 has 3 hydraulic fluid ports, and hydraulic fluid port P is connected with the hydraulic fluid port A of three position four-way directional control valve 20 by pipeline, and hydraulic fluid port C is by the cavity volume p of pipeline and hydraulic cylinder 5
AConnect, hydraulic fluid port T is connected with fuel tank 21, the oil return inlet T of the outlet of electromagnetic relief valve 13, three position four-way directional control valve 20
1Be connected with fuel tank 21 by pipeline with the inlet port of hydraulic pump 10; First pressure sensor 14 links to each other the cavity volume p of second pressure sensor 17 and hydraulic cylinder 5 with hydraulic pump 10 outlet Pp
ALink to each other the cavity volume p of the 3rd pressure sensor 18 and hydraulic cylinder 5
BLink to each other; Control device comprises: power controller 22, pressure controller 23, proportional amplifier 24, pressure feedback adjuster 25, Feedback of Power adjuster 26, power sensor 9, threeway proportional pressure-reducing valve 16 and second sensor 17; Power sensor 9 is connected with power controller 22 by Feedback of Power adjuster 26, power controller 22 is connected with pressure controller 23, pressure sensor 17 is connected with pressure controller 23 by pressure feedback adjuster 25, pressure controller 23 is connected with proportional amplifier 24, and proportional amplifier 24 is connected with threeway proportional pressure-reducing valve 16.
The another kind of form of hydraulic means is by hydraulic pump 10, motor 11, frequency converter 12, electromagnetic relief valve 13, first sensor 14, accumulator 15, threeway proportional pressure-reducing valve 16, second sensor 17, the 3rd sensor 18, one-way throttle valve 19, fuel tank 21, double piston-rod hydraulic cylinder 27, form with bi-bit bi-pass reversal valve 28, hydraulic pump 10 is connected with motor 11, motor 11 is connected with frequency converter 12, hydraulic pump 10 outlet Pp by pipeline respectively with accumulator 15, electromagnetic relief valve 13, the hydraulic fluid port A of bi-bit bi-pass reversal valve 28 and threeway proportional pressure-reducing valve 16 connect, threeway proportional pressure-reducing valve 16 has 3 hydraulic fluid ports, hydraulic fluid port P is connected with hydraulic pump 10 outlet Pp by pipeline, and hydraulic fluid port C is by the cavity volume p of pipeline and double piston-rod hydraulic cylinder 27
AConnect, hydraulic fluid port T is connected with fuel tank 21, and an end of one-way throttle valve (19) is by the cavity volume p of pipeline and double piston-rod hydraulic cylinder (27)
BConnect, the other end is connected by the hydraulic fluid port B of pipeline with bi-bit bi-pass reversal valve (28), the inlet port of the outlet of electromagnetic relief valve 13 and hydraulic pump 10 is connected with fuel tank 21, and first pressure sensor 14 is connected the cavity volume p of second pressure sensor 17 and double piston-rod hydraulic cylinder 27 with hydraulic pump 10 outlet Pp
AConnect the cavity volume p of the 3rd pressure sensor 18 and double piston-rod hydraulic cylinder 27
BConnect.
3, the present invention compared with prior art has following beneficial effect:
1. the present invention adopts threeway proportional pressure-reducing valve control emery wheel to depress power; the shortcoming that occurs in the time of can overcoming overflow valve control loading force; during with threeway proportional pressure-reducing valve control loading force; pressure rise time and fall time are basic identical; it can the proof load flow the less even load flow pressure control performance when being zero; possess two-way through-flow ability, and can on both direction, control, have overload protection function flow stream pressure.Simultaneously, compare with the servo valve load mode, when guaranteeing certain control performance, cheap, reliable operation, maintenance are simpler, and therefore, utilization threeway proportional pressure-reducing valve is comparatively desirable.
2. the present invention has increased the power control of main motor, thereby has reduced The Effect of Inertia Force on pressure controlled basis.
3. in addition in hydraulic system, the motor of driving pump work has adopted the Frequency Converter Control rotating speed, thereby flow that can control pump has improved system effectiveness, has reduced system's heating.
Four, description of drawings:
Fig. 1 is that grinding wheel of sharpening machine for copper billet is depressed constant pressure and constant power multiplex control system structural representation;
Fig. 2 is that grinding wheel of sharpening machine for copper billet is depressed constant pressure and constant power multiplex control system hydraulic means schematic diagram;
Fig. 3 is that grinding wheel of sharpening machine for copper billet is depressed constant pressure and constant power multiplex control system control device calcspar;
Fig. 4 is that grinding wheel of sharpening machine for copper billet is depressed the another kind of hydraulic means schematic diagram of constant pressure and constant power multiplex control system;
Five, the specific embodiment:
Embodiment 1:
A kind of grinding wheel of sharpening machine for copper billet is depressed constant pressure and constant power multiplex control system, and it comprises charger, hydraulic means and control device.Charger is as shown in Figure 1: by main motor 1, grinding carriage 2, support 3, and rotating shaft 4, hydraulic cylinder 5, belt pulley 6 and belt 7, emery wheel 8 etc. are partly formed.Main motor 1 and emery wheel 8 are installed on the grinding carriage 2, and main motor 1 also can be fixed on the support 3; Main motor 1 drives emery wheel 8 by belt pulley 6 and belt 7 and rotates, and grinding carriage 2 is fixed on the support 3 by rotating shaft 4, and hydraulic cylinder 5 one ends are fixed on the support 3, and the other end links to each other with grinding carriage 2; Power sensor 9 is used for detecting the power of main motor 1.In the reconditioning process, grinding carriage 2 is 4 swings around the shaft under loading hydraulic cylinder 5 acts on, so that blank, upset blank and replacing emery wheel, the blank of simultaneous adaptation reconditioning different size and the up-and-down variation of adaptation billet surface up and down.And blank is driven along charge length direction front-rear reciprocation movement by dolly, realizes length feed.In addition, whole load maintainer can also be realized traverse feed along the side-to-side movement of lathe crossbeam, makes workpiece all can obtain reconditioning on whole width.
Hydraulic means is as shown in Figure 2: be made up of hydraulic cylinder 5, hydraulic pump 10, motor 11, frequency converter 12, electromagnetic relief valve 13, first sensor 14, accumulator 15, threeway proportional pressure-reducing valve 16, second sensor 17, the 3rd sensor 18, one-way throttle valve 19, three position four-way directional control valve 20 and fuel tank 21, hydraulic pump 10 is connected with motor 11, motor 11 is connected with frequency converter 12, and hydraulic pump 10 outlet Pp meet the pressure hydraulic fluid port P of accumulator 15, electromagnetic relief valve 13 and three position four-way directional control valve 20 respectively by pipeline
1, the outlet A of three position four-way directional control valve 20, B mouth connect an end of threeway proportional pressure-reducing valve 16 and one-way throttle valve 19 respectively, and the other end of one-way throttle valve 19 is by the cavity volume p of pipeline and hydraulic cylinder 5
BConnect, threeway proportional pressure-reducing valve 16 has 3 hydraulic fluid ports, and hydraulic fluid port P is communicated with the hydraulic fluid port A of three position four-way directional control valve 20 by pipeline, and hydraulic fluid port C is by the cavity volume p of pipeline and hydraulic cylinder 5
ABe communicated with, hydraulic fluid port T is communicated with fuel tank 21, the oil return inlet T of the outlet of electromagnetic relief valve 13, three position four-way directional control valve 20
1Be connected with fuel tank 21 by pipeline with the inlet port of hydraulic pump 10; First pressure sensor 14 links to each other the cavity volume p of second pressure sensor 17 and hydraulic cylinder 5 with hydraulic pump 10 outlet Pp
ALink to each other the cavity volume p of the 3rd pressure sensor 18 and hydraulic cylinder 5
BLink to each other; Emery wheel 8 is lifted and is depressed by hydraulic cylinder 5 controls, and the action of hydraulic cylinder 5 is controlled by hydraulic means, the power of depressing of the emery wheel during reconditioning is by 16 controls of threeway proportional pressure-reducing valve, the maximum pressure of electromagnetic relief valve 13 control pumps 10 outlets, accumulator 15 is done supplementary energy usefulness, and one-way throttle valve 19 is used for the movement velocity of regulator solution cylinder pressure 5; The main element model is as follows in the hydraulic system:
1. the model of hydraulic pump 10: 1PF2G2-4X/014RR20B1BK (REXROTH),
2. the model of threeway proportional pressure-reducing valve 16: DR6/-1X100MG24K4M (REXROTH),
3. the model of three position four-way directional control valve 20: 4WE6Y50/AG24ND (Beijing China moral hydraulic industry group),
4. the model of one-way throttle valve 19: Z2FS6 (Beijing China moral hydraulic industry group),
5. the model of electromagnetic relief valve 13: DBW10A-1-30/315G24Z4 (Beijing China moral hydraulic industry group),
Control device is as shown in Figure 3: comprise power controller 22, pressure controller 23, proportional amplifier 24, pressure feedback adjuster 25, Feedback of Power adjuster 26, power sensor 9, threeway proportional pressure-reducing valve 16 and second sensor 17; Power sensor 9 is connected with power controller 22 by Feedback of Power adjuster 26, power controller 22 is connected with pressure controller 23, pressure sensor 17 is connected with pressure controller 23 by pressure feedback adjuster 25, pressure controller 23 is connected with proportional amplifier 24, and proportional amplifier 24 is connected with threeway proportional pressure-reducing valve 16; Wherein main motor 1 power output is controlled by the loading force of hydraulic cylinder, makes power output keep constant; Control procedure is: input setting power N, through power controller 22 controls; Hydraulic cylinder 5 upper cavity pressure p
ACompare with power controller 22 output valves through pressure sensor 17 detections and after 25 adjustment of pressure feedback adjuster, after pressure controller 23 controls, import proportional amplifier 24, proportional amplifier 24 output current I control threeway proportional pressure-reducing valve 16 again; The actual power Nu of main motor 1 passes through power sensor 9 and detects, and the setting power N with input after Feedback of Power controller 26 is adjusted compares, and the deviation of generation is as the input of power controller 22; The main element model is as follows in the control device:
1. power controller 22:GLKZQ011 (Hengshan Mountain, Taiyuan dynamo-electric Co., Ltd),
2. pressure controller 23:YLKZQ011 (Hengshan Mountain, Taiyuan dynamo-electric Co., Ltd),
3. proportional amplifier 24:BLFDQ011 (Hengshan Mountain, Taiyuan dynamo-electric Co., Ltd),
4. pressure feedback adjuster 25:YLFTJQ011 (Hengshan Mountain, Taiyuan dynamo-electric Co., Ltd),
5. Feedback of Power adjuster 26:GLFTJQ011 (Hengshan Mountain, Taiyuan dynamo-electric Co., Ltd),
6. the model of threeway proportional pressure-reducing valve 16: DR6/-1X100MG24K4M (REXROTH).
Embodiment 2:
Another kind of charger is made up of main motor 1, grinding carriage 2, support 3, rotating shaft 4, double piston-rod hydraulic cylinder 27, belt pulley 6, belt 7 and emery wheel 8, main motor 1 separates with grinding carriage 2, be fixed on the support 3, emery wheel 8 is installed on the grinding carriage 2, main motor 1 is connected with emery wheel 8 by belt pulley 6 and belt 7, and grinding carriage 2 is fixed on the support 3 by rotating shaft 4, and double piston-rod hydraulic cylinder 27 1 ends are fixed on the support 3, the other end links to each other with grinding carriage 2, and power sensor 9 is connected with main motor 1; Hydraulic means is as shown in Figure 4 by hydraulic pump 10, motor 11, frequency converter 12, electromagnetic relief valve 13, first sensor 14, accumulator 15, threeway proportional pressure-reducing valve 16, second sensor 17, the 3rd sensor 18, one-way throttle valve 19, fuel tank 21, double piston-rod hydraulic cylinder 27, form with bi-bit bi-pass reversal valve 28, hydraulic pump 10 is connected with motor 11, motor 11 is connected with frequency converter 12, hydraulic pump 10 outlet Pp connect accumulator 15 respectively by pipeline, electromagnetic relief valve 13, the hydraulic fluid port A of bi-bit bi-pass reversal valve 28 and threeway proportional pressure-reducing valve 16, threeway proportional pressure-reducing valve 16 has 3 hydraulic fluid ports, hydraulic fluid port P is communicated with hydraulic pump 10 outlet Pp by pipeline, and hydraulic fluid port C is by the cavity volume p of pipeline and double piston-rod hydraulic cylinder 27
ABe communicated with, hydraulic fluid port T is communicated with fuel tank 21, and an end of one-way throttle valve (19) is by the cavity volume p of pipeline and double piston-rod hydraulic cylinder (27)
BConnect, the other end is connected by the hydraulic fluid port B of pipeline with bi-bit bi-pass reversal valve (28), the inlet port of the outlet of electromagnetic relief valve 13 and hydraulic pump 10 is connected with fuel tank 21, and first pressure sensor 14 links to each other the cavity volume p of second pressure sensor 17 and double piston-rod hydraulic cylinder 27 with hydraulic pump 10 outlet Pp
ALink to each other the cavity volume p of the 3rd pressure sensor 18 and double piston-rod hydraulic cylinder 27
BLink to each other; Emery wheel 8 is lifted and is depressed by 27 controls of double piston-rod hydraulic cylinder, and the action of double piston-rod hydraulic cylinder 27 is controlled by hydraulic means, and the power of depressing of the emery wheel during reconditioning is by 16 controls of threeway proportional pressure-reducing valve; The maximum pressure of electromagnetic relief valve 13 control pumps 10 outlets, accumulator 15 is done supplementary energy and is used; The main element model is as follows in the hydraulic system:
1. the model of hydraulic pump 10: 1PF2G2-4X/014RR20B1BK (REXROTH),
2. the model of threeway proportional pressure-reducing valve 16: DR6/-1X100MG24K4M (REXROTH),
3. the model of one-way throttle valve 19: Z2FS6 (Beijing China moral hydraulic industry group),
4. the model of electromagnetic relief valve 13: DBW10A-1-30/315G24Z4 (Beijing China moral hydraulic industry group),
5. the model of bi-bit bi-pass reversal valve 28: 3WE6A-61/CG24Z4 (Beijing China moral hydraulic industry group).
Claims (2)
1, a kind of grinding wheel of sharpening machine for copper billet is depressed constant pressure and constant power multiplex control system, it comprises charger, hydraulic means and control device, charger is by main motor (1), grinding carriage (2), support (3), rotating shaft (4), hydraulic cylinder (5), belt pulley (6), belt (7), and emery wheel (8) is formed, main motor (1) and emery wheel (8) are installed on the grinding carriage (2), main motor (1) is connected with emery wheel (8) by belt pulley (6) and belt (7), grinding carriage (2) is fixed on the support (3) by rotating shaft (4), hydraulic cylinder (5) one ends are fixed on the support (3), the other end links to each other with grinding carriage (2), and power sensor (9) is connected with main motor (1); It is characterized in that hydraulic means is by hydraulic cylinder (5), hydraulic pump (10), motor (11), frequency converter (12), electromagnetic relief valve (13), first sensor (14), accumulator (15), threeway proportional pressure-reducing valve (16), second sensor (17), the 3rd sensor (18), one-way throttle valve (19), three position four-way directional control valve (20), and fuel tank (21) is formed, hydraulic pump (10) is connected with motor (11), motor (11) is connected with frequency converter (12), hydraulic pump (10) outlet Pp by pipeline respectively with accumulator (15), the pressure hydraulic fluid port P of electromagnetic relief valve (13) and three position four-way directional control valve (20)
1Connect, the outlet A of three position four-way directional control valve (20), B mouth are connected with an end of threeway proportional pressure-reducing valve (16) and one-way throttle valve (19) respectively, and the other end of one-way throttle valve (19) is by the cavity volume p of pipeline and hydraulic cylinder (5)
BConnect, threeway proportional pressure-reducing valve (16) has 3 hydraulic fluid ports, and hydraulic fluid port P is connected by the hydraulic fluid port A of pipeline with three position four-way directional control valve (20), and hydraulic fluid port C is by the cavity volume p of pipeline and hydraulic cylinder (5)
AConnect, hydraulic fluid port T is connected with fuel tank (21), the oil return inlet T of the outlet of electromagnetic relief valve (13), three position four-way directional control valve (20)
1Be connected with fuel tank (21) by pipeline with the inlet port of hydraulic pump (10); First pressure sensor (14) links to each other the cavity volume p of second pressure sensor (17) and hydraulic cylinder (5) with hydraulic pump (10) outlet Pp
ALink to each other the cavity volume p of the 3rd pressure sensor (18) and hydraulic cylinder (5)
BLink to each other; Control device comprises: power controller (22), pressure controller (23), proportional amplifier (24), pressure feedback adjuster (25), Feedback of Power adjuster (26), power sensor (9), threeway proportional pressure-reducing valve (16) and second sensor (17); Power sensor (9) is connected with power controller (22) by Feedback of Power adjuster (26), power controller (22) is connected with pressure controller (23), pressure sensor (17) is connected with pressure controller (23) by pressure feedback adjuster (25), pressure controller (23) is connected with proportional amplifier (24), and proportional amplifier (24) is connected with threeway proportional pressure-reducing valve (16).
2, a kind of grinding wheel of sharpening machine for copper billet according to claim 1 is depressed constant pressure and constant power multiplex control system, it is characterized in that: hydraulic means is by hydraulic pump (10), motor (11), frequency converter (12), electromagnetic relief valve (13), first sensor (14), accumulator (15), threeway proportional pressure-reducing valve (16), second sensor (17), the 3rd sensor (18), one-way throttle valve (19), fuel tank (21), double piston-rod hydraulic cylinder (27), form with bi-bit bi-pass reversal valve (28), hydraulic pump (10) is connected with motor (11), motor (11) is connected with frequency converter (12), hydraulic pump (10) outlet Pp by pipeline respectively with accumulator (15), electromagnetic relief valve (13), the hydraulic fluid port A of bi-bit bi-pass reversal valve (28) and threeway proportional pressure-reducing valve (16) connect, threeway proportional pressure-reducing valve (16) has 3 hydraulic fluid ports, hydraulic fluid port P is connected with hydraulic pump (10) outlet Pp by pipeline, and hydraulic fluid port C is by the cavity volume p of pipeline and double piston-rod hydraulic cylinder (27)
AConnect, hydraulic fluid port T is connected with fuel tank (21), and an end of one-way throttle valve (19) is by the cavity volume p of pipeline and double piston-rod hydraulic cylinder (27)
BConnect, the other end is connected by the hydraulic fluid port B of pipeline with bi-bit bi-pass reversal valve (28), the inlet port of the outlet of electromagnetic relief valve (13) and hydraulic pump (10) is connected with fuel tank (21), first pressure sensor (14) links to each other the cavity volume p of second pressure sensor (17) and double piston-rod hydraulic cylinder (27) with hydraulic pump (10) outlet Pp
ALink to each other the cavity volume p of the 3rd pressure sensor (18) and double piston-rod hydraulic cylinder (27)
BLink to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101530848A CN100551619C (en) | 2006-10-11 | 2006-10-11 | Grinding wheel of sharpening machine for copper billet is depressed constant pressure and constant power multiplex control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101530848A CN100551619C (en) | 2006-10-11 | 2006-10-11 | Grinding wheel of sharpening machine for copper billet is depressed constant pressure and constant power multiplex control system |
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| CN1958234A true CN1958234A (en) | 2007-05-09 |
| CN100551619C CN100551619C (en) | 2009-10-21 |
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| CN102001042A (en) * | 2010-09-27 | 2011-04-06 | 清华大学 | High-speed strong-force snagging machine tool multispindle synergic mixed hydraulic control system and control method |
| CN102674338A (en) * | 2012-06-08 | 2012-09-19 | 机械工业第三设计研究院 | Constant pressure oil line system and control method in process of graphitizing carbon product |
| CN103192304A (en) * | 2013-04-11 | 2013-07-10 | 朱梦静 | Adaptive polishing device utilizing electromagnetic thrust |
| CN101725589B (en) * | 2009-11-11 | 2013-07-17 | 北京市三一重机有限公司 | Hydraulic system and rotary drilling rig comprising same |
| CN104454740A (en) * | 2014-12-31 | 2015-03-25 | 北京二七轨道交通装备有限责任公司 | Milling device hydraulic system and steel rail milling and grinding vehicle |
| CN104797827A (en) * | 2012-11-20 | 2015-07-22 | 沃尔沃建筑设备公司 | Pressurized medium assembly |
| CN106926073A (en) * | 2015-12-29 | 2017-07-07 | 宝钢工程技术集团有限公司 | Lower pressure adjustable excircle sharpening machine and its application method |
| CN108115474A (en) * | 2017-12-20 | 2018-06-05 | 中建材衢州金格兰石英有限公司 | A kind of cylindrical grinder of quartz glass and its method is ground outside |
| CN108895043A (en) * | 2018-08-09 | 2018-11-27 | 江苏大学 | A kind of hydraulic pump constant-pressure control device and control method |
| CN110405561A (en) * | 2019-08-29 | 2019-11-05 | 四川省川磨岷机联合数控机器股份有限公司 | A kind of hydraulic feed formula horizontal axis is away from platform surface grinding machine |
| CN110405561B (en) * | 2019-08-29 | 2024-04-26 | 四川省川磨岷机联合数控机器股份有限公司 | Hydraulic feeding type horizontal axis rectangular table surface grinder |
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| CN101725589B (en) * | 2009-11-11 | 2013-07-17 | 北京市三一重机有限公司 | Hydraulic system and rotary drilling rig comprising same |
| CN102001042B (en) * | 2010-09-27 | 2012-12-26 | 清华大学 | High-speed strong-force snagging machine tool multispindle synergic mixed hydraulic control system and control method |
| CN102001042A (en) * | 2010-09-27 | 2011-04-06 | 清华大学 | High-speed strong-force snagging machine tool multispindle synergic mixed hydraulic control system and control method |
| CN102674338B (en) * | 2012-06-08 | 2014-04-09 | 机械工业第三设计研究院 | Constant pressure oil line system and control method in process of graphitizing carbon product |
| CN102674338A (en) * | 2012-06-08 | 2012-09-19 | 机械工业第三设计研究院 | Constant pressure oil line system and control method in process of graphitizing carbon product |
| CN104797827A (en) * | 2012-11-20 | 2015-07-22 | 沃尔沃建筑设备公司 | Pressurized medium assembly |
| US9926005B2 (en) | 2012-11-20 | 2018-03-27 | Volvo Construction Equipment Ab | Pressurized medium assembly |
| CN103192304B (en) * | 2013-04-11 | 2013-12-11 | 朱梦静 | Adaptive polishing device utilizing electromagnetic thrust |
| CN103192304A (en) * | 2013-04-11 | 2013-07-10 | 朱梦静 | Adaptive polishing device utilizing electromagnetic thrust |
| CN104454740A (en) * | 2014-12-31 | 2015-03-25 | 北京二七轨道交通装备有限责任公司 | Milling device hydraulic system and steel rail milling and grinding vehicle |
| CN104454740B (en) * | 2014-12-31 | 2017-02-01 | 中车北京二七机车有限公司 | Milling device hydraulic system and steel rail milling and grinding vehicle |
| CN106926073A (en) * | 2015-12-29 | 2017-07-07 | 宝钢工程技术集团有限公司 | Lower pressure adjustable excircle sharpening machine and its application method |
| CN108115474A (en) * | 2017-12-20 | 2018-06-05 | 中建材衢州金格兰石英有限公司 | A kind of cylindrical grinder of quartz glass and its method is ground outside |
| CN108895043A (en) * | 2018-08-09 | 2018-11-27 | 江苏大学 | A kind of hydraulic pump constant-pressure control device and control method |
| CN108895043B (en) * | 2018-08-09 | 2020-07-31 | 江苏大学 | Constant pressure control device and method for hydraulic pump |
| CN110405561A (en) * | 2019-08-29 | 2019-11-05 | 四川省川磨岷机联合数控机器股份有限公司 | A kind of hydraulic feed formula horizontal axis is away from platform surface grinding machine |
| CN110405561B (en) * | 2019-08-29 | 2024-04-26 | 四川省川磨岷机联合数控机器股份有限公司 | Hydraulic feeding type horizontal axis rectangular table surface grinder |
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| CN100551619C (en) | 2009-10-21 |
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