CN105170812A - Oil way system of crimping machine and oil way control method thereof - Google Patents
Oil way system of crimping machine and oil way control method thereof Download PDFInfo
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- CN105170812A CN105170812A CN201510574842.2A CN201510574842A CN105170812A CN 105170812 A CN105170812 A CN 105170812A CN 201510574842 A CN201510574842 A CN 201510574842A CN 105170812 A CN105170812 A CN 105170812A
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000002788 crimping Methods 0.000 title abstract 5
- 239000002828 fuel tank Substances 0.000 claims description 49
- 239000012530 fluid Substances 0.000 claims description 41
- 238000012856 packing Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 203
- 238000005516 engineering process Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention provides an oil way system of a crimping machine and belongs to the technical field of hydraulic transmission. By means of the oil way system, the problem that an existing oil way system of a crimping machine is low in work efficiency is solved. The oil way system of the crimping machine comprises an oil pump, an oil cylinder and an oil tank used for storing oil. The oil pump is arranged in the oil tank and connected with a motor, and the motor can drive the oil pump to pump out the oil in the oil tank. The oil pump and the oil cylinder are communicated through an electromagnetic reversing valve, a booster for increasing the pressure of the oil way system is arranged between the electromagnetic reversing valve and the oil cylinder, and the booster is communicated with the electromagnetic reversing valve and the oil cylinder. The invention further provides an oil way control method of the oil way system of the crimping machine. The oil way system has the advantages that the structure is simple, and oil input and return are rapid.
Description
Technical field
The invention belongs to hydraulic transmission technology field, relate to a kind of oil piping system and oil circuit control method thereof of buckle machine.
Background technology
Buckle machine is a kind of hydraulic test for withholding pipe fitting assembly, supporting metal joint is applied convergent force by the mould of buckle machine by it, metal joint is firmly withheld on the brake pipe on supporting engineering machinery high-pressure oil pipe or automobile, machine oil pipe, air-conditioner pipe, power pipe, be widely used in the industries such as vehicle, engineering machinery, hydraulic machinery, welding and cutting device.
Different industries, different product when carrying out withholding work to the speed of withholding of buckle machine, withhold pressure and other parameters requirement also different, buckle machine adopts hydraulic system to drive, corresponding oil pump, oil piping system etc. are arranged for different needs of work of withholding, equipment is more, systematic comparison is complicated, so operating efficiency is not high enough, often causes the work period to extend, be unfavorable for the work of withholding continue carry out.
In addition, for the operating mechanism that some partial duty pressure are larger, the driver part of fixation pressure scope cannot meet their demand, causes related work to carry out smoothly.
In sum, for solving the structural deficiency of the existing oil piping system for buckle machine, need to design a kind of structure simple, can the oil piping system of the buckle machine of oil inlet and oil return fast.
Summary of the invention
The object of the invention is to there are the problems referred to above for existing technology, propose a kind of structure simple, can the oil piping system of the buckle machine of oil inlet and oil return fast.
Object of the present invention realizes by following technical proposal: a kind of oil piping system of buckle machine, comprise oil pump, oil cylinder and the fuel tank for storing fluid, described oil pump is arranged on fuel tank internal and is connected with motor on oil pump, described motor can drive oil pump to be pumped from fuel tank internal by fluid, described oil pump and oil cylinder are by the mutual UNICOM of solenoid directional control valve, between solenoid directional control valve and oil cylinder, be provided with the booster for increasing oil piping system pressure, and booster respectively with solenoid directional control valve, oil cylinder UNICOM.
In the oil piping system of above-mentioned a kind of buckle machine, between solenoid directional control valve with oil cylinder, be also provided with the hydraulic control one-way valve in parallel with booster, and hydraulic control one-way valve respectively with solenoid directional control valve, oil cylinder UNICOM.
In the oil piping system of above-mentioned a kind of buckle machine, described oil cylinder comprises piston and oil cylinder is divided into oil suction chamber, oil back chamber by piston, described hydraulic control one-way valve, booster all with oil suction chamber UNICOM, described solenoid directional control valve respectively with oil suction chamber, oil back chamber UNICOM, and solenoid directional control valve also with fuel tank UNICOM.
In the oil piping system of above-mentioned a kind of buckle machine, be also connected with Solenoid ball valve at hydraulic control one-way valve near oil cylinder one end, described Solenoid ball valve respectively with oil suction chamber, fuel tank UNICOM.
In the oil piping system of above-mentioned a kind of buckle machine, be connected with sensor at booster near oil suction chamber one end, and sensor, booster, hydraulic control one-way valve, oil suction chamber and Solenoid ball valve UNICOM.
In the oil piping system of above-mentioned a kind of buckle machine, solenoid directional control valve is also connected with the first overflow valve, described first overflow valve and fuel tank UNICOM, and solenoid directional control valve, the first overflow valve, oil back chamber three UNICOM.
In the oil piping system of above-mentioned a kind of buckle machine, described oil pump is by line gap filter and fuel tank UNICOM, and oil pump is by tubular filter and solenoid directional control valve UNICOM.
In the oil piping system of above-mentioned a kind of buckle machine, the Pressure gauge of mutual UNICOM, the second overflow valve are installed between tubular filter and solenoid directional control valve, described second overflow valve and fuel tank UNICOM, and tubular filter, Pressure gauge, the second overflow valve and solenoid directional control valve UNICOM.
In the oil piping system of above-mentioned a kind of buckle machine, fuel tank is also provided with oil ga(u)ge and air filter.
An oil circuit control method for the oil piping system of buckle machine, concrete steps are as follows:
S1: open motor, oil pump, open solenoid directional control valve side oil circuit, controls Solenoid ball valve and is in closed condition, and the fluid now in fuel tank finally enters the oil suction chamber of oil cylinder and to promote piston protruding through oil pump, solenoid directional control valve, hydraulic control one-way valve successively;
S2: drive solenoid directional control valve to get back to meta, control oil pump is in Light Condition, and now each oil circuit is all in packing state, piston keeps stretching out state simultaneously;
S3: open solenoid directional control valve opposite side oil circuit, open Solenoid ball valve, the fluid now in fuel tank finally enters the oil back chamber of oil cylinder through oil pump, solenoid directional control valve successively and promotes piston and inwardly bounce back;
S4: drive solenoid directional control valve to get back to meta, close Solenoid ball valve, motor and oil pump.
The step to oil cylinder supercharging is also comprised between step S1 and step S2:
Open booster, control hydraulic control one-way valve and be in closed condition, the fluid now in fuel tank finally enters the oil suction chamber of oil cylinder successively to increase the pressure to piston through oil pump, solenoid directional control valve, booster.
Compared with prior art, structure of the present invention is simple, reasonable in design and easy to operate; Can quick oil feeding, fast oil return, increase work efficiency; Adopting booster, oil piping system pressure can be increased when not changing operation of oil pump pressure, reduce power consumption, the demand that difference withholds pressure can be met, realize better withholding work.
Accompanying drawing explanation
Fig. 1 is the structural representation of a preferred embodiment of the present invention.
In figure, 10, fuel tank; 20, motor; 30, oil pump; 40, oil cylinder; 41, oil suction chamber; 42, oil back chamber; 43, piston; 51, solenoid directional control valve; 52, Solenoid ball valve; 53, hydraulic control one-way valve; 60, booster; 71, sensor; 72, Pressure gauge; 81, line gap filter; 82, tubular filter; 83, air filter; 91, the first overflow valve; 92, the second overflow valve; 100, oil ga(u)ge.
Detailed description of the invention
Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiments.
As shown in Figure 1, the oil piping system of this buckle machine comprises oil pump 30, oil cylinder 40 and the fuel tank 10 for storing fluid, oil pump 30 is arranged on fuel tank 10 inside and is connected with motor 20 on oil pump 30, motor 20 can drive oil pump 30 to be pumped from fuel tank 10 inside by fluid, oil pump 30 and oil cylinder 40 are by solenoid directional control valve 51 UNICOM mutually, between solenoid directional control valve 51 and oil cylinder 40, be provided with the booster 60 for increasing oil piping system pressure, and booster 60 respectively with solenoid directional control valve 51, oil cylinder 40 UNICOM.
In most hydraulic system, be all often select the oil pump 30 of suitable working pressure range value to be used as power source according to pressure required in oil circuit.If in hydraulic system, whole system needs low pressure, and local or a certain branch road are when needing high pressure, can adopt and high-pressure oil pump is set separately to increase oil circuit pressure, but so, can make that equipment increases, cost improves and can increase the complexity of whole hydraulic system, be unfavorable for simple, the high efficiency of hydraulic system.
Now, can need the local of high pressure or a certain branch road arrange a booster 60, booster 60 is in fact a kind of hydraulic amplifier, the local oil circuit of system or certain executive module can be made to obtain hydraulic oil than high many times of oil pump 30 operating pressure, to meet the needs of partial duty mechanism, and system still remains on lower pressure operation, power consumption, minimizing equipment, simplification system so just can be reduced.
Be provided with booster 60 in the present invention, can increase the pressure on oil circuit, namely increase the pressure to oil cylinder 40, thus the buckle press of buckle machine to product is improved, ensure to withhold effect, operating efficiency is high.
Preferably, between solenoid directional control valve 51 with oil cylinder 40, be also provided with the hydraulic control one-way valve 53 in parallel with booster 60, and hydraulic control one-way valve 53 respectively with solenoid directional control valve 51, oil cylinder 40 UNICOM.
Solenoid directional control valve 51, hydraulic control one-way valve 53 and oil cylinder 40 are linked to be an oil circuit, hydraulic control one-way valve 53 is in parallel with booster 60, booster 60 has certain opening pressure, and the oil circuit oil pressure at hydraulic control one-way valve 53 place is zero, therefore, fluid pumps from oil pump 30 and enters solenoid directional control valve 51 at the beginning, then directly enter hydraulic control one-way valve 53, then enter oil cylinder 40, realize quick oil feeding, impel buckle machine to carry out snap-fit, increase work efficiency.
When oil pressure reaches the opening pressure of booster 60, booster 60 is started working, and fluid oil pressure after booster 60 out can increase, and also correspondingly improve the pressure of oil cylinder 40 after entering oil cylinder 40, namely the buckle press of buckle machine is also improved.
Hydraulic control one-way valve 53 can prevent fluid reverse flow, and sealing is relatively good, and when connecting control oil, can also realize two-way circulating.Adopt hydraulic control one-way valve 53 to realize quick oil feeding herein, also can prevent fluid reverse flow simultaneously.
Further preferably, oil cylinder 40 comprises piston 43 and oil cylinder 40 is divided into oil suction chamber 41, oil back chamber 42 by piston 43, hydraulic control one-way valve 53, booster 60 all with oil suction chamber 41 UNICOM, solenoid directional control valve 51 respectively with oil suction chamber 41, oil back chamber 42 UNICOM, and solenoid directional control valve 51 also with fuel tank 10 UNICOM.
In oil-feed process, fluid first enters oil suction chamber 41 through hydraulic control one-way valve 53, and driven plunger 43 is protruding, when oil pressure reaches the opening pressure of booster 60, fluid enters oil suction chamber 41 through booster 60, strengthens the pressure to piston 43, and now hydraulic control one-way valve 53 is closed.
Solenoid directional control valve 51 in the present invention is preferably three-position four-way electromagnetic directional valve, significantly, solenoid directional control valve 51 respectively with oil suction chamber 41, oil back chamber 42 UNICOM, solenoid directional control valve 51 and fuel tank 10 UNICOM are then that fluid directly flows back to fuel tank 10 through solenoid directional control valve 51 in order to when system oil return.
Further preferably, be also connected with Solenoid ball valve 52 at hydraulic control one-way valve 53 near oil cylinder 40 one end, Solenoid ball valve 52 respectively with oil suction chamber 41, fuel tank 10 UNICOM.
The setting of Solenoid ball valve 52 is the quick oil returns in order to realize system, Solenoid ball valve 52 is only opened when oil return, when oil return, fluid directly enters oil back chamber 42 through oil pump 30, solenoid directional control valve 51, and a part of fluid simultaneously in oil suction chamber 41 oppositely can enter Solenoid ball valve 52 and directly flow back to fuel tank 10.
At fluid while oil pump 30, solenoid directional control valve 51 enter oil back chamber 42, some fluid enters hydraulic control one-way valve 53 as control oil, reverse opening hydraulic control one-way valve 53, hydraulic control one-way valve 53 now can realize two-way circulating, therefore, a part of fluid in oil suction chamber 41 can oppositely enter hydraulic control one-way valve 53, then solenoid directional control valve 51 directly flows back to fuel tank 10.Now, the oil return of system divides two-way to carry out simultaneously, realizes quick oil return, impels buckle machine fast fallback.
In addition, due to the effect of booster 60, oil suction chamber 41 pressure is too high, arranges the release that Solenoid ball valve 52 is convenient to oil suction chamber 41.
Preferably, be connected with sensor 71 at booster 60 near oil suction chamber 41 one end, and sensor 71, booster 60, hydraulic control one-way valve 53, oil suction chamber 41 and Solenoid ball valve 52 5 UNICOM.Sensor 71 can detect the oil pressure of oil circuit, is presented at by oil pressure in display screen (not shown), can regulate oil pressure within controlled range simultaneously.
Preferably, solenoid directional control valve 51 is also connected with the first overflow valve 91, first overflow valve 91 and fuel tank 10 UNICOM, and solenoid directional control valve 51, first overflow valve 91, oil back chamber 42 three UNICOM.
The setting of the first overflow valve 91, the outlet oil pressure of the solenoid directional control valve 51 when oil return can be regulated, avoid opening booster 60, when outlet oil pressure reaches certain value, part fluid will directly flow back to fuel tank 10 by the first overflow valve 91, and remaining fluid then can enter oil back chamber 42.
Further preferably, oil pump 30 is by line gap filter 81 and fuel tank 10 UNICOM, and oil pump 30 is by tubular filter 82 and solenoid directional control valve 51 UNICOM.
Line gap filter 81, tubular filter 82 are all to carry out filtration to fluid, line gap filter 81 can filter the fluid entering oil pump 30, tubular filter 82 enters the fluid of solenoid directional control valve 51 for filtering, because solenoid directional control valve 51 pairs of working media particles are very sensitive, ensure that the fluid entering solenoid directional control valve 51 is clean, free from admixture through double filtration.
Preferably, Pressure gauge 72, second overflow valve 92 of mutual UNICOM is installed between tubular filter 82 and solenoid directional control valve 51, second overflow valve 92 and fuel tank 10 UNICOM, and tubular filter 82, Pressure gauge 72, second overflow valve 92 and solenoid directional control valve 51 4 UNICOM.
Pressure gauge 72 is for detecting the output pressure of oil pump 30, and the second overflow valve 92 is for regulating the output pressure of oil pump 30, second overflow valve 92 is similar with the operation principle of the first overflow valve 91, when the output pressure of oil pump 30 is higher than operating pressure, part fluid can flow back to fuel tank 10 through the second overflow valve 92, ensures the output pressure of oil pump 30.
Further preferably, fuel tank 10 is also provided with oil ga(u)ge 100 and air filter 83.Oil ga(u)ge 100 can observe oil mass and oil temperature, and operating personnel understand the number of the fluid of fuel tank 10 inside according to the height of oil mass, supplement as required; The operation of height to hydraulic system of oil temperature has a certain impact, and when finding that oil temperature is lower, oil pump 30 can be made to carry out zero load, when oil temperature rises, then carry out withholding work.
Operationally, need to ensure that the air pressure inside and outside fuel tank 10 is consistent, air filter 83 can make the atmospheric pressure in fuel tank 10 and external pressure be consistent, and can also filter simultaneously, the impurity such as dust can not be allowed to enter fuel tank 10 to air.
Present invention also offers a kind of oil circuit control method of oil piping system of buckle machine, concrete steps are as follows:
The first step: open motor 20, oil pump 30, open solenoid directional control valve 51 side oil circuit, control Solenoid ball valve 52 and be in closed condition, the fluid now in fuel tank 10 finally enters the oil suction chamber 41 of oil cylinder 40 and to promote piston 43 protruding through oil pump 30, solenoid directional control valve 51, hydraulic control one-way valve 53 successively;
Now system is in oil-feed state, particularly, fluid finally enters the oil suction chamber 41 of oil cylinder 40 successively through line gap filter 81, oil pump 30, tubular filter 82, solenoid directional control valve 51, hydraulic control one-way valve 53 from fuel tank 10, realize quick oil feeding, impel buckle machine to carry out snap-fit.
Wherein, when the pressure needed for the work of withholding exceeds the pressure limit value of oil pump 30, the step to oil cylinder 40 supercharging is also comprised: open booster 60 between first step step and second step step, control hydraulic control one-way valve 53 and be in closed condition, the fluid now in fuel tank 10 finally enters the oil suction chamber 41 of oil cylinder 40 to increase the pressure to piston 43 through oil pump 30, solenoid directional control valve 51, booster 60 successively;
When oil pressure reaches the opening pressure of booster 60, hydraulic control one-way valve 53 is closed, and fluid only enters oil suction chamber 41 through booster 60, strengthens the pressure to piston 43, thus reaches the pressure needed for the work of withholding.
Second step: drive solenoid directional control valve 51 to get back to meta, control oil pump 30 is in Light Condition, and now each oil circuit is all in packing state, piston 43 keeps stretching out state simultaneously;
3rd step: open solenoid directional control valve 51 opposite side oil circuit, open Solenoid ball valve 52, booster 60 is in closed condition, and the fluid now in fuel tank 10 finally enters the oil back chamber 42 of oil cylinder 40 through oil pump 30, solenoid directional control valve 51 successively and promotes piston 43 and inwardly bounce back;
Now system is in oil return state, a fluid part finally enters the oil back chamber 42 of oil cylinder 40 through oil pump 30, solenoid directional control valve 51, also some fluid enters hydraulic control one-way valve 53 as control oil simultaneously, and then oppositely open hydraulic control one-way valve 53, a fluid part in oil suction chamber 41 oppositely enters hydraulic control one-way valve 53, then flows back to fuel tank 10 by solenoid directional control valve 51.
In addition, Solenoid ball valve 52 is opened, and another part fluid in oil suction chamber 41 oppositely enters Solenoid ball valve 52, directly flows back to fuel tank 10 by Solenoid ball valve 52.Thus.The oil return of system divides two-way to carry out simultaneously, realizes quick oil return, impels buckle machine fast fallback.
4th step: drive solenoid directional control valve 51 to get back to meta, close Solenoid ball valve 52, motor 20 and oil pump 30.Now once the work of withholding completes, and when continuing to carry out withholding work, motor 20 and oil pump 30 can be kept to be in opening.
Structure of the present invention is simple, easy and simple to handle, and can realize quick oil feeding, oil return fast, and can meet the demand that difference withholds pressure, operating efficiency is high, applied range.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (10)
1. the oil piping system of a buckle machine, it is characterized in that, comprise oil pump, oil cylinder and the fuel tank for storing fluid, described oil pump is arranged on fuel tank internal and is connected with motor on oil pump, described motor can drive oil pump to be pumped from fuel tank internal by fluid, described oil pump and oil cylinder, by the mutual UNICOM of solenoid directional control valve, are provided with the booster for increasing oil piping system pressure between solenoid directional control valve and oil cylinder, and booster respectively with solenoid directional control valve, oil cylinder UNICOM.
2. the oil piping system of a kind of buckle machine according to claim 1, is characterized in that, between solenoid directional control valve with oil cylinder, be also provided with the hydraulic control one-way valve in parallel with booster, and hydraulic control one-way valve respectively with solenoid directional control valve, oil cylinder UNICOM.
3. the oil piping system of a kind of buckle machine according to claim 2, it is characterized in that, described oil cylinder comprises piston and oil cylinder is divided into oil suction chamber, oil back chamber by piston, described hydraulic control one-way valve, booster all with oil suction chamber UNICOM, described solenoid directional control valve respectively with oil suction chamber, oil back chamber UNICOM, and solenoid directional control valve also with fuel tank UNICOM.
4. the oil piping system of a kind of buckle machine according to claim 3, is characterized in that, is also connected with Solenoid ball valve at hydraulic control one-way valve near oil cylinder one end, described Solenoid ball valve respectively with oil suction chamber, fuel tank UNICOM.
5. the oil piping system of a kind of buckle machine according to claim 4, is characterized in that, is connected with sensor at booster near oil suction chamber one end, and sensor, booster, hydraulic control one-way valve, oil suction chamber and Solenoid ball valve UNICOM.
6. the oil piping system of a kind of buckle machine according to claim 3 or 4 or 5, is characterized in that, solenoid directional control valve is also connected with the first overflow valve, described first overflow valve and fuel tank UNICOM, and solenoid directional control valve, the first overflow valve, oil back chamber three UNICOM.
7. the oil piping system of a kind of buckle machine according to claim 1, is characterized in that, described oil pump is by line gap filter and fuel tank UNICOM, and oil pump is by tubular filter and solenoid directional control valve UNICOM.
8. the oil piping system of a kind of buckle machine according to claim 7, it is characterized in that, the Pressure gauge of mutual UNICOM, the second overflow valve are installed between tubular filter and solenoid directional control valve, described second overflow valve and fuel tank UNICOM, and tubular filter, Pressure gauge, the second overflow valve and solenoid directional control valve UNICOM.
9. an oil circuit control method for the oil piping system of buckle machine, is characterized in that, comprise step:
S1: open motor, oil pump, open solenoid directional control valve side oil circuit, controls Solenoid ball valve and is in closed condition, and the fluid now in fuel tank finally enters the oil suction chamber of oil cylinder and to promote piston protruding through oil pump, solenoid directional control valve, hydraulic control one-way valve successively;
S2: drive solenoid directional control valve to get back to meta, control oil pump is in Light Condition, and now each oil circuit is all in packing state, piston keeps stretching out state simultaneously;
S3: open solenoid directional control valve opposite side oil circuit, open Solenoid ball valve, the fluid now in fuel tank finally enters the oil back chamber of oil cylinder through oil pump, solenoid directional control valve successively and promotes piston and inwardly bounce back;
S4: drive solenoid directional control valve to get back to meta, close Solenoid ball valve, motor and oil pump.
10. the oil circuit control method of the oil piping system of a kind of buckle machine according to claim 9, is characterized in that, also comprises the step to oil cylinder supercharging between step S1 and step S2:
Open booster, control hydraulic control one-way valve and be in closed condition, the fluid now in fuel tank finally enters the oil suction chamber of oil cylinder successively to increase the pressure to piston through oil pump, solenoid directional control valve, booster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510574842.2A CN105170812A (en) | 2015-09-10 | 2015-09-10 | Oil way system of crimping machine and oil way control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510574842.2A CN105170812A (en) | 2015-09-10 | 2015-09-10 | Oil way system of crimping machine and oil way control method thereof |
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| CN105170812A true CN105170812A (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510574842.2A Pending CN105170812A (en) | 2015-09-10 | 2015-09-10 | Oil way system of crimping machine and oil way control method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107584000A (en) * | 2017-10-17 | 2018-01-16 | 柳州北斗星液压科技有限公司 | Multi-pass pipe forming system and method |
| CN109465345A (en) * | 2017-09-19 | 2019-03-15 | 王鸿建 | A large-diameter crimping machine and its oil supply system |
| CN113883108A (en) * | 2021-11-11 | 2022-01-04 | 科达制造股份有限公司 | Continuous flow amplifier and hydraulic press |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109465345A (en) * | 2017-09-19 | 2019-03-15 | 王鸿建 | A large-diameter crimping machine and its oil supply system |
| CN109465345B (en) * | 2017-09-19 | 2024-04-16 | 王鸿建 | Large-opening-diameter buckling press and oil supply system thereof |
| CN107584000A (en) * | 2017-10-17 | 2018-01-16 | 柳州北斗星液压科技有限公司 | Multi-pass pipe forming system and method |
| CN113883108A (en) * | 2021-11-11 | 2022-01-04 | 科达制造股份有限公司 | Continuous flow amplifier and hydraulic press |
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Application publication date: 20151223 |