CN101934425A - Hydraulic control system of friction welding machine - Google Patents
Hydraulic control system of friction welding machine Download PDFInfo
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- CN101934425A CN101934425A CN2009100542061A CN200910054206A CN101934425A CN 101934425 A CN101934425 A CN 101934425A CN 2009100542061 A CN2009100542061 A CN 2009100542061A CN 200910054206 A CN200910054206 A CN 200910054206A CN 101934425 A CN101934425 A CN 101934425A
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Abstract
The invention discloses a hydraulic control system of a friction welding machine, comprising a two-position four-way reversing valve, a pressure-reducing valve, an oil cylinder, a three-position four-way reversing valve, a flow speed control valve, an electromagnetic relief valve and a pump source device. The hydraulic control system of the friction welding machine is characterized in that the pump source device comprises three constant-pressure variable pumps and a two-stage constant-pressure variable pump, pressure oil needed for activating a movable clamp oil cylinder, a rotary clamp oil cylinder and a clutch brake oil cylinder is respectively provided by the three constant-pressure variable pumps, and pressure oil needed for activating a pushing oil cylinder is provided by the two-stage constant-pressure variable pump. With respect to the pump source device, the combination of the three constant-pressure variable pumps and the two-stage constant-pressure variable pump is adopted to provide system oil pressure instead of a duplex constant delivery pump so as to reduce the power consumption of the system, stabilize the oil temperature and finally enable the hydraulic control system to stably operate. By measurement, in a C450-type friction welding machine adopting the hydraulic control system, the average power consumption of a circulating hydraulic system in a friction welding process is decreased by 50 percent from 874 KJ of the prior art to 436 KJ.
Description
Technical field
The present invention relates to mechanical field, be specifically related to a kind of friction-welding machine hydraulic control system.
Background technology
With reference to Fig. 2, existing friction-welding machine hydraulic control system comprises two position and four-way reversing valves, pressure-reducing valve, oil cylinder, three position four-way directional control valve, flow speed control valve, electromagnetic relief valve and pumping source device, interlock by each valve, the clamp of controlling friction-welding machine with unclamp, clutch and braking, and the slide unit direction of motion, speed and axial compressive force.
The pumping source device 30 of this hydraulic control system adopts duplex constant displacement pumps 10 for system provides pressure oil, and wherein the little pump of duplex constant displacement pump 10 provides pressure oil for clamp and clutch system, and the pressure size is controlled by electromagnetic relief valve B17; The big pump of duplex constant displacement pump 10 provides pressure oil for the slide unit motion, and the pressure size is controlled by electromagnetic relief valve A16.The action of mobile anchor clamps oil cylinder 7 is controlled by two position and four-way reversing valve c3, and pressure is controlled by pressure-reducing valve A4.The action of rolling clamp oil cylinder 8 is controlled by two position and four-way reversing valve B2, and pressure is controlled by pressure-reducing valve B5.The action of clutch and brake oil cylinder 9 is controlled by two position and four-way reversing valve A1, and pressure is controlled by pressure-reducing valve C6.Push action cylinder 11 drives the slide units motion, realizes that F.F. in the friction welding process, worker advance, friction, upset and five stages of rewind down.The worker advances and friction phase, two position and four-way reversing valve D14 work, and friction pressure is by pressure-reducing valve D15 control, and work speed is by flow speed control valve 13 controls.When F.F. and rewind down, two position and four-way reversing valve D14 dead electricity, three position four-way directional control valve 12 work, F.F. and rewind down speed depend on the metered flow of the big pump of duplex constant displacement pump 10.During upset, three position four-way directional control valve 12 right sides get electric work, and the pressure size is controlled by electromagnetic relief valve A16.
In clamping or clutch and brake process, the piston of mobile anchor clamps oil cylinder 7, rolling clamp oil cylinder 8 and clutch and brake oil cylinder 9 is done mechanical movement, and the pressure oil that the little pump of duplex constant displacement pump 10 produces is formed with the mechanical power of usefulness.When clamp or unclamp put in place, after clutch and brake puts in place, the piston of mobile anchor clamps oil cylinder 7, rolling clamp oil cylinder 8 and clutch and brake oil cylinder 9 stops mechanical movement, there is not useful mechanical power consumption this moment, system is in packing stage, but the little pump of duplex constant displacement pump 10 is still with constant flow rate work, a large amount of high-pressure and hydraulic oil flow back to fuel tank by electromagnetic relief valve B17, and the Oil pump electrical machinery consumed power almost all changes into heat.In F.F. and rewind down process, the piston of push action cylinder 11 is done mechanical movement, and the pressure oil that the big pump of duplex constant displacement pump 10 produces is formed with the mechanical power of usefulness.In friction and upset stage, the piston machine move distance of push action cylinder 11 is also very little, this moment, useful mechanical power consumed corresponding also very little, system is in packing stage substantially, but the big pump of duplex constant displacement pump 10 is still with constant flow rate work, a large amount of high-pressure and hydraulic oil flow back to fuel tank by electromagnetic relief valve A16, almost all change into heat.Because in whole welding process, clamping or clutch and brake process and F.F. are relative with the rewind down process time very short, less than 10% of whole weld interval, in most of the time, system is in conservative state, the hydraulic oil that duplex constant displacement pump 10 produces flows back to fuel tank by electromagnetic relief valve A16 and electromagnetic relief valve B17, does not produce useful mechanical power, changes into heat all.Cause oily temperature rise too fast, useless power is very big, and power utilization is very low.Simultaneously, hydraulic oil temperature directly influences hydraulic oil viscosity, and temperature is high more, viscosity is more little, and corresponding system leak quantitative changeization is big more, and the flow resistance of pipeline changes also more greatly, cause the various parameters of system to change thus. cause the instability of system, the corresponding reduction of control accuracy.If adopt cooling system control oil temperature, need the electric power that is directly proportional with quantity of heat production again, a large amount of heats are discharged in the atmosphere, are unfavorable for environmental protection.After measured, C450 type friction-welding machine adopts above-mentioned hydraulic control system, and the average power consumption of a friction welding process circulation fluid pressing system is about 874KJ.
Summary of the invention
Cause high, the unsettled deficiency of system of oil temperature owing to useless power attenuation is high in order to overcome prior art, the invention provides a kind of friction-welding machine hydraulic control system, its pumping source device adopts three mode feed system oil pressure that constant pressure variable displacement pump combines with a two-stage constant pressure variable displacement pump, can reduce power attenuation, stabilize oil temperature and final stable hydraulic control system.
The technical solution adopted for the present invention to solve the technical problems: a kind of friction-welding machine hydraulic control system, comprise two position and four-way reversing valves, pressure-reducing valve, oil cylinder, three position four-way directional control valve, flow speed control valve, electromagnetic relief valve and pumping source device, be characterized in that described pumping source device is made up of three constant pressure variable displacement pumps and a two-stage constant pressure variable displacement pump, mobile anchor clamps oil cylinder, the required pressure oil of rolling clamp oil cylinder and clutch and brake cylinder action is provided by three constant pressure variable displacement pumps respectively, the required pressure oil of push action cylinder action is provided by a two-stage constant pressure variable displacement pump, slide unit two-stage axial compressive force is directly controlled by the constant pressure valve on the two-stage constant pressure variable displacement pump, and the slide unit movement velocity is controlled by flow speed control valve.
The invention has the beneficial effects as follows: because its pumping source device adopts three modes that constant pressure variable displacement pump combines with a two-stage constant pressure variable displacement pump, substitute the duplex constant displacement pump and come the feed system oil pressure, reduce the power attenuation of whole system, stablized oily temperature and final hydraulic control system steady operation.After measured, C450 type friction-welding machine adopts hydraulic control system of the present invention, and the average power consumption of a friction welding process circulation fluid pressing system drops to 436KJ by the 874KJ of prior art, and power consumption has reduced by 50%.Simultaneously because mobile anchor clamps oil cylinder, rolling clamp oil cylinder and the required pressure oil of clutch and brake cylinder action provides by three constant pressure variable displacement pumps respectively, when having avoided three oil cylinders to move separately to the influence of other two oil cylinder working-pressures.
Description of drawings
Fig. 1 is a friction-welding machine hydraulic control system schematic diagram of the present invention;
Fig. 2 is a prior art friction-welding machine hydraulic control system schematic diagram.
The specific embodiment
With reference to Fig. 1, the present invention includes two position and four-way reversing valves, pressure-reducing valve, oil cylinder, three position four-way directional control valve, flow speed control valve, electromagnetic relief valve and pumping source device, its pumping source device 30 is by constant pressure variable displacement pump A18, constant pressure variable displacement pump B19, pump C20 is put in the constant voltage change and two-stage constant pressure variable displacement pump 24 is served as, reduced the pressure-reducing valve D15 of prior art control friction and worker's entrance pressure power, reduced the mobile anchor clamps oil cylinder 7 of control, the pressure-reducing valve A4 of rolling clamp oil cylinder 8 and the required pressure of clutch and brake oil cylinder 9 actions, pressure-reducing valve B5 and pressure-reducing valve C6 have also reduced the electromagnetic relief valve B 17 that controls duplex constant displacement pump 10 little pump pressures.Electromagnetic relief valve C21, the electromagnetic relief valve D22 and the electromagnetic relief valve E23 that play the safeguard protection effect have been increased.At this moment, electromagnetic relief valve A16 also only plays the safeguard protection effect.
Mobile anchor clamps oil cylinder 7, rolling clamp oil cylinder 8 and the required pressure oil of clutch and brake oil cylinder 9 actions are provided by constant pressure variable displacement pump A18, constant pressure variable displacement pump B19 and constant pressure variable displacement pump C20 respectively, its oil circuit pressure is set up by separately constant pressure valve on constant pressure variable displacement pump A18, constant pressure variable displacement pump B19 and the constant pressure variable displacement pump C20 respectively, and two position and four-way reversing valve A1, two position and four-way reversing valve B2, two position and four-way reversing valve C3 control three road binders road directions respectively.The setting pressure of electromagnetic relief valve C21, electromagnetic relief valve T22 and electromagnetic relief valve E23 will only play the safety valve effect respectively greater than the setting pressure of constant pressure variable displacement pump A18, constant pressure variable displacement pump B19 and constant pressure variable displacement pump C20 in the course of work.Clamp and unclamp in the course of action at mobile anchor clamps oil cylinder 7, when clamping pressure during less than constant pressure variable displacement pump 18 setting pressures, the output of constant pressure variable displacement pump 18 flowing full amounts, realize the tight and loose Ji in centre fast, after clamping pressure reached constant pressure variable displacement pump 18 setting pressures, constant pressure variable displacement pump 18 was in packing state, hydraulic oil only needs seldom, and flow can keep-up pressure constant, constant pressure variable displacement pump 18 output flows are very little, reduced flowing of hydraulic oil, thereby reduced the loss of power.In like manner, clamp and unclamp in the course of action at the rolling clamp oil cylinder, when clamping pressure during less than constant pressure variable displacement pump 19 setting pressures, the output of constant pressure variable displacement pump 19 flowing full amounts realizes clamping fast and unclamping, after clamping pressure reaches constant pressure variable displacement pump 19 setting pressures, constant pressure variable displacement pump 19 is in packing state, and it is constant that hydraulic oil only needs seldom flow to keep-up pressure, and constant pressure variable displacement pump 19 output flows are very little, reduce flowing of hydraulic oil, thereby reduced the loss of power.In like manner, in clutch and brake cylinder action process, when clutch and brake pressure during less than constant pressure variable displacement pump 20 setting pressures, the output of constant pressure variable displacement pump 20 flowing full amounts realizes quick clutch and brake, after clutch and brake pressure reaches constant pressure variable displacement pump 20 setting pressures, constant pressure variable displacement pump 20 is in packing state, and it is constant that hydraulic oil only needs seldom flow to keep-up pressure, and constant pressure variable displacement pump 20 output flows are very little, reduce flowing of hydraulic oil, thereby reduced the loss of power.In a word, adopting constant pressure variable displacement pump A18, constant pressure variable displacement pump B19 and constant pressure variable displacement pump C20 to be respectively mobile anchor clamps oil cylinder 7, rolling clamp oil cylinder 8 and 9 actions of clutch and brake oil cylinder provides required pressure oil can reduce the loss of power, effectively prevent oily temperature rise, strengthen the stability of system.Simultaneously because mobile anchor clamps oil cylinder, rolling clamp oil cylinder and the required pressure oil of clutch and brake cylinder action provides by three constant pressure variable displacement pumps respectively, when having avoided three oil cylinders to move separately to the influence of other two oil cylinder working-pressures.
The required pressure oil of push action cylinder 11 actions is provided by two-stage constant pressure variable displacement pump 24, the slide unit axial compressive force is directly controlled by constant pressure valve A27 on the two-stage constant pressure variable displacement pump 24 and constant pressure valve B28, the slide unit direction of motion is by three position four-way directional control valve 12 controls, the slide unit worker advances movement velocity by flow speed control valve 13 controls, and slide unit F.F. movement velocity is by the no load discharge control of two-stage constant pressure variable displacement pump 24.Can preestablish corresponding respectively friction of constant pressure valve .A27 and constant pressure valve on the two-stage constant pressure variable displacement pump 24: B28 and upsetting force.The setting pressure of electromagnetic relief valve A16 is greater than the maximum set pressure of two-stage constant pressure variable displacement pump 24, and T does only to play in the process safety valve effect.
During F.F., two position and four-way reversing valve E26 on the two-stage constant pressure variable displacement pump 24 are failure to actuate, and constant pressure valve A27 works.Three position four-way directional control valve 12 right side electromagnet get, hydraulic oil feeds push action cylinder 11 right chambeies, chamber, left side fluid is directly by three position four-way directional control valve 12 oil returns, because only with overcoming the guide rail movement damping, load is lighter, system pressure is less than the setting pressure of constant pressure valve A27, constant pressure valve A27 spool is in the left side, oil circuit is opened, variable piston on the two-stage constant pressure variable displacement pump 24 25 right chambeies and oil return are joined, and pressure is very low, and left chamber is a system pressure, variable piston 25 overcomes spring force and moves right to extreme position under the system pressure effect, the flow of twin-stage constant pressure variable displacement pump 24 increases to maximum.Under push action cylinder 11 drives, the slide unit rapid movement.If load strengthens suddenly, as two welding work pieces contacts, the slide unit motion is obstructed, and system pressure strengthens, and acts on the spring force of the pressure in constant pressure valve A27 left side greater than the right side, the spool of constant pressure valve A27 moves to the right, the throttling action that constant pressure valve A27 forms strengthens, and variable piston 25 right cavity pressures strengthen, and promote the variable piston to left movement, the flow of two-stage constant pressure variable displacement pump 24 reduces, and the thrust up to variable piston 25 both sides is in poised state.Under poised state, the thrust of variable piston 25 both sides equates that left chamber is a system pressure, and right cavity pressure is determined jointly by the throttle orifice that throttle orifice on system pressure, the variable piston 25 and constant pressure valve A27 spool form.Constant pressure valve A27 spring force is big more, and system pressure required when keeping variable piston 25 balances is just big more, and system pressure is big more during balance.During rewind down, three position four-way directional control valve 12 right side electromagnet get electric, and the work and the adjustment process of two-stage constant pressure variable displacement pump 24 are the same.
When the worker advanced, two-stage constant pressure variable displacement pump 24 was foretold. two position and four-way reversing valve E26 action, constant pressure valve .B28 works.Three position four-way directional control valve 12 must not be electric, and two position and four-way reversing valve D14 get electric, and flow speed control valve 13 works, and the slide unit movement velocity is reduced.At this moment, because the throttling action of flow speed control valve 13, the loine pressure before two-stage constant pressure variable displacement pump 24 backs, the flow speed control valve 13 improves, and reaches on the two-stage constant pressure variable displacement pump 24 after the constant pressure valve B28 setting pressure, acts on constant pressure valve.The pressure in B28 left side is greater than the spring force on constant pressure valve B28 right side, the spool of constant pressure valve B28 moves to the right, the throttling action that constant pressure valve B28 forms strengthens, variable piston 25 right cavity pressures strengthen, promote variable piston 25 to left movement, two-stage constant pressure variable displacement pump 24 output flows reduce, and are finally identical with flow speed control valve control flow.
When friction and upset, the pressure height is respectively by constant pressure valve B28 on the two-stage constant pressure variable displacement pump 24 and constant pressure valve A27 control.The slide unit movement velocity depends primarily on the shortening speed of welding work pieces in friction and the compressing process.When system pressure less than the constant pressure valve setting pressure, the big flows output of two-stage constant pressure variable displacement pump 24 guarantees the quick response of pressure; When system pressure greater than setting pressure, act on the spring force of the pressure in constant pressure valve left side greater than the constant pressure valve right side, the spool of constant pressure valve moves to the right, the throttling action that constant pressure valve forms strengthens, variable piston 25 right cavity pressures strengthen, promote variable piston 25 to left movement, the flow of two-stage constant pressure variable displacement pump 24 reduces, and the thrust up to variable piston 25 both sides is in poised state.Two-stage constant pressure variable displacement pump 24 is regulated output flow automatically, and is constant to keep system pressure.Because the shortening speed of welding work pieces can be very not big in friction and the compressing process, so pressure reach after the setting value to keep flow very little, two-stage constant pressure variable displacement pump 24 power outputs are little, required motor power is little, reduced the flowage friction of hydraulic oil, effectively prevent oily temperature rise, strengthened the stability of system.
Mobile anchor clamps oil cylinder 7, rolling clamp oil cylinder 8 and the required pressure oil of clutch and brake oil cylinder 9 actions are provided by constant pressure variable displacement pump A18, constant pressure variable displacement pump B19 and constant pressure variable displacement pump C20 respectively, and the required pressure oil of application of force oil cylinder 11 actions is provided by two-stage constant pressure variable displacement pump 24.
The friction welding preparatory stage, two position and four-way reversing valve A1, two position and four-way reversing valve B2, two position and four-way reversing valve c3, two position and four-way reversing valves 7 and three position four-way directional control valve 12 all are in power failure state, electromagnetic relief valve A16, electromagnetic relief valve C21, electromagnet on electromagnetic relief valve D22 and the electromagnetic relief valve E23 also all is in power failure state, whole device is in unloading condition, set up constant pressure variable displacement pump A18 as required, constant pressure valve force value on constant pressure variable displacement pump B19 and the constant pressure variable displacement pump C220 is set at friction pressure and upsetting force respectively with the force value of constant pressure valve B28 on the two-stage constant pressure variable displacement pump 24 and constant pressure valve A27.Start constant pressure variable displacement pump A18, constant pressure variable displacement pump B19 and constant pressure variable displacement pump C20 and two-stage constant pressure variable displacement pump 24, preparation is finished.
Electromagnet on the electromagnetic relief valve C21 gets electric, and mobile anchor clamps oil circuit is built pressure.The electromagnet of two position and four-way reversing valve C3 gets electric, moves centre tool system and clamps.In the clamping process, when pressure during less than the setting pressure of constant pressure variable displacement pump A18, the output of constant pressure variable displacement pump A18 flowing full amount, realize clamping fast, reach the setting pressure of constant pressure variable displacement pump A18 when clamp pressure after, constant pressure variable displacement pump A18 is in packing state, and constant pressure variable displacement pump A18 flow reduces automatically.
Electromagnet on the electromagnetic relief valve D22 gets electric, and the rolling clamp oil circuit is built pressure.The electromagnet of two position and four-way reversing valve B2 gets electric, and the rolling clamp system clamps.In the clamping process, when pressure during less than the setting pressure of constant pressure variable displacement pump B19, the output of constant pressure variable displacement pump B19 flowing full amount, realize clamping fast, reach the setting pressure of constant pressure variable displacement pump B19 when clamp pressure after, constant pressure variable displacement pump B19 is in packing state, and constant pressure variable displacement pump B19 flow reduces automatically.
The electromagnet of electromagnetic relief valve 16 gets electric, and the slide unit kinematic system begins to build pressure.Power up for three position four-way directional control valve 12 right-hand members, push action cylinder 11 pistons promote slide unit to left movement.Only with overcoming the slide unit resistance of motion, load is very light during the slide unit F.F., and variable piston 25 is in low order end on the two-stage constant pressure variable displacement pump 24, and two-stage constant pressure variable displacement pump 24 makes slide unit rapid movement to the left with the output of maximum empty current-carrying capacity.
When slide unit enters worker's carry when putting, three position four-way directional control valve 12 dead electricity, two position and four-way reversing valves 14 electric, flow speed control valve 13 works, and the slide unit movement velocity is reduced.At this moment, because the throttling action of flow speed control valve 13, loine pressure before two-stage constant pressure variable displacement pump 24 backs, the flow speed control valve 13 improves, act on the spring force of the pressure in constant pressure valve B28 left side greater than constant pressure valve B28 right side, the spool of constant pressure valve B28 moves to the right, and the throttling action that constant pressure valve B28 forms strengthens, variable piston 25 right cavity pressures strengthen, promote variable piston 25 to left movement, two-stage constant pressure variable displacement pump 24 output flows reduce, and are finally identical with flow speed control valve control flow.After the worker advanced, two position and four-way reversing valve C3 powered up, and main shaft begins to rotate.
After the contact of the both sides of friction welding workpiece, the engaging friction shape is read, and the slide unit movement velocity slows down.The slide unit movement velocity depends primarily on weldment friction shortening speed.The slide unit movement velocity is less than work speed, loine pressure before two-stage constant pressure variable displacement pump 24 backs, the flow speed control valve 13 further improves, the pressure that acts on constant pressure valve B28 left side overcomes the spring force on constant pressure valve B28 right side, promote the further motion to the right of spool of constant pressure valve B28, the throttling action that constant pressure valve B28 forms is bigger, variable piston 25 right cavity pressures strengthen, and promote variable piston 25 to left movement, and two-stage constant pressure variable displacement pump 24 output flows further reduce.Too small when flow, when being not enough to replenish the weldment friction and shortening the required flow of the piston motion that causes, system pressure will reduce.Act on the thrust of the spring force on constant pressure valve B28 right side this moment, promote constant pressure valve greater than the left side.The spool of B28 moves to the left, and the throttling action that constant pressure valve B28 forms diminishes, and variable piston 25 right cavity pressures reduce, and variable piston 25 moves right, and two-stage constant pressure variable displacement pump 24 output flows improve.The required flow of piston motion that self-regulating result finally makes two-stage constant pressure variable displacement pump 24 output flows and weldment friction shorten and causes adapts to, to keep the pressure that constant pressure valve B28 sets, i.e. friction pressure.
After fraction time reaches, two position and four-way reversing valve C3 dead electricity, principal shaft braking stall.Two position and four-way reversing valves, 14 dead electricity, while three position four-way directional control valve 12 right-hand members get electric, and flow speed control valve is inoperative.Two position and four-way reversing valves 26 must be electric on the two-stage constant pressure variable displacement pump 24, and constant pressure valve A27 and variable piston 25 right chambeies are connected, and the level pressure power that there is not of constant pressure valve A27 is upsetting force, is higher than friction pressure.Therefore act on the thrust of the spring force on constant pressure valve A27 right side this moment greater than the left side, the spool that promotes constant pressure valve A27 moves to the left, the throttling action that constant pressure valve A27 forms diminishes, variable piston 25 right cavity pressures reduce, variable piston 25 moves right, two-stage constant pressure variable displacement pump 24 output flows improve, and realize compressing process.When system pressure improves, the thrust that acts on constant pressure valve A27 left side is during greater than the spring force of the setting on constant pressure valve A27 right side, the spool that promotes constant pressure valve A27 moves to the right, it is big that the throttling action that constant pressure valve A27 forms becomes, variable piston 25 right cavity pressures strengthen, promote variable piston 25 to left movement, two-stage constant pressure variable displacement pump 24 output flows reduce.Enter packing state this moment, required constant pressure, welding work pieces almost no longer shorten, and two-stage constant pressure variable displacement pump 24 enters pressure and fill and gives state, hydraulic oil only needs a spot of supply to satisfy hydraulic system leakage can to keep-up pressure constantly, and two-stage constant pressure variable displacement pump 24 is realized high pressures, low discharge fuel feeding.
After the dwell time of setting reaches, three position four-way directional control valve 12 dead electricity, the slide unit motion ends.Two position and four-way reversing valve B2 dead electricity, rolling clamp unclamps.Three position four-way directional control valve 12 left sides get electric, the oil circuit commutation, and slide unit moves to the right.At this moment, because load is lighter, system pressure reduces, act on the thrust of the spring force on constant pressure valve A27 right side greater than the left side, the spool that promotes constant pressure valve .A27 moves to the left, and the throttling action that constant pressure valve A27 forms diminishes, variable piston 25 right cavity pressures reduce, variable piston 25 moves right, and two-stage constant pressure variable displacement pump 24 output flows improve, and realizes slide unit motion rewind down.After original position, three position four-way directional control valve 12 left side dead electricity, two position and four-way reversing valve A1 dead electricity, mobile anchor clamps discharge, and finish a weld cycle.
The electromagnet of two position and four-way reversing valve C3, two position and four-way reversing valve B2 powers up, and chucking appliance system clamps.In the clamping process, when pressure during less than setting pressure, the output of constant pressure variable displacement pump 18 flowing full amounts realizes clamping fast, and after clamp pressure reached setting pressure, constant pressure variable displacement pump 18 was in packing state, and constant pressure variable displacement pump 18 flows reduce automatically.
Two proportional variable pump 19 pressure are set at a forging force, flow set is the F.F. flow, three position four-way directional control valve 12 right-hand members power up, slide unit is moved to the left, because load is light during F.F., two proportional variable pumps 19 make slide unit rapid movement to the left by the F.F. flow output of setting, and enter fast forward stage.When slide unit enters worker's carry when putting, two proportional variable pump 19 pressure are set at friction pressure, flow set is worker's influent stream amount, because load this moment is still light, two proportional variable pumps 19 make slide unit move to the left with suitable low speed by worker's influent stream amount output of setting, enter the worker and advance the stage.Simultaneously, two position and four-way reversing valve A1 power up, and main shaft begins to rotate.
In the anchor clamps release process, when pressure during less than the setting pressure of constant pressure variable displacement pump A18, constant pressure variable displacement pump B19, constant pressure variable displacement pump A18 and the output of constant pressure variable displacement pump B19 flowing full amount, realize unclamping fast, after anchor clamps unclamp pressure and reach the setting pressure of constant pressure variable displacement pump A18 and constant pressure variable displacement pump B 19, constant pressure variable displacement pump A18 and constant pressure variable displacement pump B19 are in packing state, and constant pressure variable displacement pump A18 and constant pressure variable displacement pump B19 flow reduce automatically.
After slide unit moves to original position, the off-load of electromagnetic relief valve A16 dead electricity, the system pressure behind the two-stage constant pressure variable displacement pump 24 is almost nil.Variable piston 25 left cavity pressures are zero, and to left movement, two-stage constant pressure variable displacement pump 24 output flows reduce variable piston 25 under the spring force effect, realize two-stage constant pressure variable displacement pump 24 low pressure, low discharge output, and the required motor driving power is very little.After measured, C450 type friction-welding machine adopts above-mentioned hydraulic control system, and the average power consumption of a friction welding process circulation fluid pressing system is reduced to 436KJ, and compared with prior art power consumption has reduced by 50%.
More than disclosed only be several specific embodiment of the present invention, but the present invention is not limited thereto, any those skilled in the art can think variation, all should drop in protection scope of the present invention.
Claims (5)
1. friction-welding machine hydraulic control system, comprise two position and four-way reversing valves, pressure-reducing valve, oil cylinder, three position four-way directional control valve, flow speed control valve, electromagnetic relief valve and pumping source device, it is characterized in that, described pumping source device is made up of constant pressure variable displacement pump and two proportional variable pump, mobile anchor clamps oil cylinder, rolling clamp oil cylinder and the required pressure oil of clutch and brake cylinder action are provided by constant pressure variable displacement pump, the required pressure oil of push action cylinder action is provided by proportional variable pump, and slide unit movement velocity, axial compressive force are directly controlled by proportional variable pump.
2. friction-welding machine hydraulic control system as claimed in claim 1, it is characterized in that described two-stage constant pressure variable displacement pump is set friction pressure and upsetting force by its constant pressure valve, no load discharge by its two-stage constant pressure variable displacement pump is set the slide unit fast forward speed, by setting work speed by its flow speed control valve.
3. friction-welding machine hydraulic control system as claimed in claim 1 is characterized in that, described pair of proportional variable pump, and its worker advances with the pairing proportion control voltage of F.F. flow, friction and upsetting force to be needed to demarcate in advance.
4. friction-welding machine hydraulic control system as claimed in claim 1 is characterized in that, described three constant pressure variable displacement pumps, and the setting of its pressure is corresponding mobile anchor clamps oil cylinder, rolling clamp oil cylinder and the required operating pressure of clutch and brake oil cylinder respectively.
5. friction-welding machine hydraulic control system as claimed in claim 1 is characterized in that, the setting pressure of described constant pressure variable displacement pump is greater than the maximum that moves centre tool oil cylinder, rolling clamp oil cylinder and clutch and brake oil cylinder operating pressure.
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| CN2009100542061A CN101934425A (en) | 2009-06-30 | 2009-06-30 | Hydraulic control system of friction welding machine |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102380704A (en) * | 2011-09-19 | 2012-03-21 | 大连维乐液压制造有限公司 | Hydraulic station of automatic friction welding machine |
| CN102777446A (en) * | 2012-07-17 | 2012-11-14 | 徐州铭硕机械科技有限公司 | Oil-water conversion variable displacement emulsion pump station |
| CN102966632A (en) * | 2012-11-16 | 2013-03-13 | 无锡汇虹机械制造有限公司 | Energy-saving consumption reduction method of hydraulic system of friction welding machine |
| CN103042304A (en) * | 2012-12-28 | 2013-04-17 | 上海胜春机械有限公司 | Servo hydraulic system of friction welding machine |
| CN103350278A (en) * | 2013-06-24 | 2013-10-16 | 天津大学 | Pressure-controlled friction stir welding main shaft head device |
| CN105414741A (en) * | 2016-01-08 | 2016-03-23 | 重庆德蚨乐机械制造有限公司 | Friction welding floating zero system and axial and radial welding control method thereof |
| CN106762970A (en) * | 2016-12-26 | 2017-05-31 | 中航力源液压股份有限公司 | Double ratio control structures and control method of a kind of variable displacement motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102380704A (en) * | 2011-09-19 | 2012-03-21 | 大连维乐液压制造有限公司 | Hydraulic station of automatic friction welding machine |
| CN102380704B (en) * | 2011-09-19 | 2014-10-22 | 大连维乐液压制造有限公司 | Hydraulic station of automatic friction welding machine |
| CN102777446A (en) * | 2012-07-17 | 2012-11-14 | 徐州铭硕机械科技有限公司 | Oil-water conversion variable displacement emulsion pump station |
| CN102777446B (en) * | 2012-07-17 | 2015-09-23 | 徐州铭硕机械科技有限公司 | A kind of oil-water conversion variable displacement emulsion pump station |
| CN102966632A (en) * | 2012-11-16 | 2013-03-13 | 无锡汇虹机械制造有限公司 | Energy-saving consumption reduction method of hydraulic system of friction welding machine |
| CN103042304A (en) * | 2012-12-28 | 2013-04-17 | 上海胜春机械有限公司 | Servo hydraulic system of friction welding machine |
| CN103350278A (en) * | 2013-06-24 | 2013-10-16 | 天津大学 | Pressure-controlled friction stir welding main shaft head device |
| CN105414741A (en) * | 2016-01-08 | 2016-03-23 | 重庆德蚨乐机械制造有限公司 | Friction welding floating zero system and axial and radial welding control method thereof |
| CN106762970A (en) * | 2016-12-26 | 2017-05-31 | 中航力源液压股份有限公司 | Double ratio control structures and control method of a kind of variable displacement motor |
| CN106762970B (en) * | 2016-12-26 | 2019-06-28 | 中航力源液压股份有限公司 | A kind of double ratio control structures and control method of variable displacement motor |
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Application publication date: 20110105 |