CN104191027A - Hydraulic system of plate shearing machine - Google Patents

Hydraulic system of plate shearing machine Download PDF

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Publication number
CN104191027A
CN104191027A CN201410415397.0A CN201410415397A CN104191027A CN 104191027 A CN104191027 A CN 104191027A CN 201410415397 A CN201410415397 A CN 201410415397A CN 104191027 A CN104191027 A CN 104191027A
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valve
hydraulic
control valve
hydraulicchange
main hydraulic
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CN201410415397.0A
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CN104191027B (en
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王阳阳
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China's Cnc Machine Tools (jiangsu) Co Ltd
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China's Cnc Machine Tools (jiangsu) Co Ltd
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Abstract

The invention discloses a hydraulic system of a plate shearing machine. The hydraulic system comprises a hydraulic pump set, a system oil pressure control block, a pressing cylinder control valve block, a plurality of pressing cylinders, a main hydraulic cylinder control valve block and a pair of main hydraulic cylinders. The output end of the hydraulic pump set is respectively connected with the system oil pressure control block, the input end of the pressing cylinder control valve block and the input end of the main hydraulic cylinder control valve block, the output end of the system oil pressure control block is communicated with an oil tank, the output end of the pressing cylinder control valve block is respectively connected with back cavities of the multiple pressing cylinders, the output end of the main hydraulic cylinder control valve block is connected with back cavities of the pair of main hydraulic cylinders, and the ends of piston rods of the pair of main hydraulic cylinders are respectively connected with the upper side of a knife rest. The hydraulic system is simple in structure and convenient to operate, the manufacturing cost is reduced, and the multiple pressing cylinders stay in the pressure maintaining state when shearing force is gradually increased; the oil pressures of the pressing cylinders staying in the pressure maintaining state are not increased any more, pressing force is not increased any more, the surfaces of sheared plates cannot generate indentations, and the quality of the surfaces of the sheared plates is improved.

Description

Hydraulic system of cutting machine
Technical field
The present invention relates to a kind of shearing machine, especially a kind of hydraulic system of plate shearing machine, belongs to pressure processing technology field.
Background technology
Plate shearing machine is in the time of shear, if pressure-plate-force is inadequate, will be produced displacement by shear material in shear history, to shear at the end displacement more obvious, can make like this to be increased by shear material dimensional discrepancy especially.If pressure-plate-force is excessive, makes to be cut panel surface and produce impression, also increased the load of binder cylinder to frame and binder beam simultaneously, in order to ensure the strength and stiffness of frame and binder beam, only has the cross-sectional area that increases frame and binder beam, thereby increase plate shearing machine overall weight, strengthened the manufacturing cost of plate shearing machine.
CN2818031Y Chinese invention patent discloses a kind of lock formula hydraulic system of cutting machine, the control valve of this hydraulic system comprises 1 two four-way electromagnetic reversing valve of 2 two-bit triplet solenoid directional control valves, 2 2/2-way solenoid directional control valves as poppet valve and check valve group, also have pressure-reducing valve, hydraulic control one-way valve, balanced valve and oil pressure relay, except integrated valve group, monomer valve amounts to 14 more than, complex structure, potential faults point is many.This hydraulic system has realized the independent control of lock formula plate shearing machine binder action in function, and can regulate pressure-plate-force by pressure-reducing valve, oil pressure relay ensures pressure-plate-force accurate and effective, realize the order function that binder is sheared simultaneously, promoted stability and the reliability of lock formula hydraulic system of cutting machine system.But, in the time of the operation of lock formula plate shearing machine, along with going deep into of shearing, system oil pressure can further raise, because pressure-reducing valve reduces pressure in proportion, in the time that its input oil pressure increases, its output oil pressure also can increase, cause pressure-plate-force excessive, cut panel surface can produce impression, impact is by the surface quality of shear material.
Summary of the invention
The object of this invention is to provide a kind of simple in structure, cost is low, easy to operate, pressure-plate-force can be along with shearing force increases and the hydraulic system of cutting machine that increases.
The present invention is achieved by the following technical programs:
A kind of hydraulic system of cutting machine, comprise hydraulic pump group, system oil pressure controll block, binder cylinder control valve piece, several binder cylinders, main hydraulic cylinder control valve piece and a pair of main hydraulic cylinder, the output of hydraulic pump group respectively with system oil pressure controll block, binder cylinder control valve piece input, main hydraulic cylinder control valve piece input is connected, system oil pressure controll block output leads to fuel tank, binder cylinder control valve piece output is connected with several binder cylinder back cavities respectively, main hydraulic cylinder control valve piece output is connected with a pair of main hydraulic cylinder back cavity, a pair of main hydraulic cylinder piston rod end is connected with knife rest upside respectively.
Object of the present invention can also further realize by following technical measures.
Aforesaid hydraulic system of cutting machine, wherein said binder cylinder control valve piece comprises the 2/2-way hydraulicchange-over valve of working connection, and check valve and the choke valve of binder cylinder control valve piece oil circuit control, hydraulic pump group output is connected with 2/2-way hydraulicchange-over valve first end, check valve not-go-end respectively, check valve go side is connected with 2/2-way hydraulicchange-over valve hydraulic control end respectively by choke valve, and 2/2-way hydraulicchange-over valve hydraulic control end, 2/2-way hydraulicchange-over valve the second end are connected with several binder cylinder back cavities respectively.
Aforesaid hydraulic system of cutting machine, wherein said main hydraulic cylinder control valve piece comprises two-bit triplet hydraulicchange-over valve, and the one-way throttle valve of main hydraulic cylinder control valve piece oil circuit control and two four-way electromagnetic reversing valves, hydraulic pump group output respectively with two-bit triplet hydraulicchange-over valve first end, two four-way electromagnetic reversing valve first ends are connected, two four-way electromagnetic reversing valve the second ends are connected with two-bit triplet hydraulicchange-over valve hydraulic control end by one-way throttle valve, two-bit triplet hydraulicchange-over valve the 3rd end is connected with a pair of main hydraulic cylinder back cavity respectively, two-bit triplet hydraulicchange-over valve the second end leads to fuel tank.
Aforesaid hydraulic system of cutting machine, wherein system oil pressure controll block comprises two solenoid directional control valves, overflow valve and plug-in mounting valve member.
Aforesaid hydraulic system of cutting machine, being wherein connected by stop valve of a pair of main hydraulic cylinder back cavity.
The present invention is simple in structure, easy to operate, reduced manufacturing cost, and 3 control valve pieces of the present invention have 14 monomer valve that 10 monomer valve replace existing hydraulic system of cutting machine, have reduced potential faults point, have improved reliability of the present invention and operating efficiency.When plate shearing machine operation, oil pressure oil is opened two-bit triplet hydraulicchange-over valve by main hydraulic cylinder control valve piece oil circuit control; Hydraulic oil promotes by the 2/2-way hydraulicchange-over valve of binder cylinder control valve piece that several binder cylinder plugs are descending to be pushed down by shear material, and simultaneously a pair of main hydraulic cylinder promotes knife rest and declines and shear plate; Along with the continuous increase of shearing force, system oil pressure also increases thereupon, has closed 2/2-way hydraulicchange-over valve, has cut off the back cavity oil circuit of several binder cylinders, and several binder cylinders are all in packing state; Along with proceeding of shearing, shearing force continues to increase, and system oil pressure constantly raises, but no longer increases in the binder cylinder oil pressure of packing state, and pressure-plate-force no longer increases, and is cut panel surface can or can not produce impression, has improved by the surface quality of shear material.
Advantage and disadvantage of the present invention, by for illustration and explanation the non-limitative illustration by preferred embodiment below, these embodiment, only provide as an example with reference to accompanying drawing.
Brief description of the drawings
Fig. 1 is hydraulic schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, the present invention includes hydraulic pump group 1, system oil pressure controll block 2, binder cylinder control valve piece 3, 3 binder cylinders 4, main hydraulic cylinder control valve piece 5 and a pair of main hydraulic cylinder 6, the output of hydraulic pump group 1 respectively with system oil pressure controll block 2, binder cylinder control valve piece 3 inputs, main hydraulic cylinder control valve piece 5 inputs are connected, system oil pressure controll block 2 outputs lead to fuel tank 9, binder cylinder control valve piece 3 outputs are connected with 3 binder cylinder 4 back cavities respectively, main hydraulic cylinder control valve piece 5 outputs are connected with a pair of main hydraulic cylinder 6 back cavities, a pair of main hydraulic cylinder piston rod 61 terminations are connected with knife rest 7 upsides respectively.
System oil pressure controll block 2 comprises two solenoid directional control valves 21, overflow valve 22 and inserted valve 23, the system oil pressure that Pressure gauge 24 is set up for display system oil pressure controll block 2.
Binder cylinder control valve piece 3 comprises the 2/2-way hydraulicchange-over valve 31 of working connection 8, and check valve 321 and the choke valve 322 of binder cylinder control valve piece oil circuit control 32, main hydraulic cylinder control valve piece 5 comprises two-bit triplet hydraulicchange-over valve 51, and the one-way throttle valve 521 of main hydraulic cylinder control valve piece oil circuit control 52 and two four-way electromagnetic reversing valves 522.
Hydraulic pump group output 11 by output pipe 8 respectively with 2/2-way hydraulicchange-over valve first end 311(P1), check valve 321 is connected, check valve 321 by choke valve 322 respectively with 2/2-way hydraulicchange-over valve hydraulic control end 313(C1) be connected, 2/2-way hydraulicchange-over valve hydraulic control end 313(C1), 2/2-way hydraulicchange-over valve the second end 312 (A1) is connected with 3 binder cylinder 4 back cavities respectively.
Hydraulic pump group output 11 by output pipe 8 also respectively with two-bit triplet hydraulicchange-over valve first end 511(P2), two four-way electromagnetic reversing valve first end 522-1(P3) be connected, two four-way electromagnetic reversing valve the second end 522-2 (B3) are by one-way throttle valve 521 and two-bit triplet hydraulicchange-over valve hydraulic control end 514(C2) be connected, two-bit triplet hydraulicchange-over valve the 3rd end 513(B2) be connected with a pair of main hydraulic cylinder 6 back cavities respectively, two-bit triplet hydraulicchange-over valve the second end 512(A2) logical fuel tank 9.For the ease of maintenance, the stop valve 10 that passes through of a pair of main hydraulic cylinder 6 back cavities is connected.
The course of work of the present invention is as follows:
1, idle running; Two solenoid directional control valve 21 dead electricity of system oil pressure controll block 2, overflow valve 22 is in unloading condition, and the hydraulic oil that hydraulic pump group output 11 pumps flows back to fuel tank 9, system pressure table 24 pointer back to zero through inserted valve 23.
2, shear; Two solenoid directional control valves 21 of system oil pressure controll block 2 obtain electric system construction in a systematic way and press, the hydraulic pressure oil content two-way that hydraulic pump group output 11 pumps, one tunnel is through 2/2-way hydraulicchange-over valve first end 311(P1), 2/2-way hydraulicchange-over valve the second end 312(A1) flow to 3 binder cylinder 4 back cavities, 3 descending pushing down by shear material of binder cylinder plug 41.Another road flows to two-bit triplet hydraulicchange-over valve first end 511(P2), hydraulic oil is also successively by two four-way electromagnetic reversing valves 522 of main hydraulic cylinder control valve piece oil circuit control 52, one-way throttle valve 521 leads to two-bit triplet hydraulicchange-over valve hydraulic control end 514(C2), along with the raising of system oil pressure, in the time that oil pressure reaches the oil pressure that two-bit triplet hydraulicchange-over valve 51 sets up, two-bit triplet hydraulicchange-over valve hydraulic control end 514(C2) open, hydraulic oil is through two-bit triplet hydraulicchange-over valve the 3rd end 513(B2) flow to a pair of main hydraulic cylinder 6, knife rest 7 is descending, blade starts to shear plate, along with going deep into of shearing, system oil pressure further raises, and arrives the unlatching oil pressure that 2/2-way hydraulicchange-over valve 31 is set, and 2/2-way hydraulicchange-over valve 31 commutates, and has cut off the back cavity oil circuit of 3 binder cylinders 4, and binder cylinder 4 is in packing state, shearing is proceeded, and system oil pressure continues to raise, but the oil pressure of binder cylinder 4 no longer raises.The unlatching oil pressure that 2/2-way hydraulicchange-over valve 31 of the present invention is set is greater than the unlatching oil pressure of the setting of two-bit triplet hydraulicchange-over valve 51.
3, backhaul; After shearing finishes, two solenoid directional control valves, the 21 dead electricity off-loads of system oil pressure controll block 2, the hydraulic oil that hydraulic pump group output 11 pumps flows back to fuel tank 9 through inserted valve 23, and overflow valve 22 is in unloading condition.2/2-way hydraulicchange-over valve 31, two-bit triplet hydraulicchange-over valve 51 are got back to initial position under the effect of valve core spring, 3 logical fuel tanks 9 of binder cylinder 4 back cavities, and binder cylinder plug 41 resets under the effect of its back-moving spring 42.A pair of main hydraulic cylinder 6 back cavity fluid are by two-bit triplet hydraulicchange-over valve the second end 512(A2 communicating with fuel tank 9) off-load, oil return, as hydraulic shock can be passed through more greatly to adjust one-way throttle valve 521 damping hole size adjustment off-load speed, and get back to original position by a pair of kicker cylinder (not drawing in Fig. 1).
In addition to the implementation, the present invention can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of requirement of the present invention.

Claims (5)

1. a hydraulic system of cutting machine, comprise hydraulic pump group, system pressure controll block, binder cylinder control valve piece, several binder cylinders, main hydraulic cylinder control valve piece and a pair of main hydraulic cylinder, it is characterized in that, the output of hydraulic pump group respectively with system pressure controll block, binder cylinder control valve piece input, main hydraulic cylinder control valve piece input is connected, system pressure controll block output leads to fuel tank, binder cylinder control valve piece output is connected with several binder cylinder back cavities respectively, main hydraulic cylinder control valve piece output is connected with a pair of main hydraulic cylinder back cavity, a pair of main hydraulic cylinder piston rod end is connected with knife rest upside respectively.
2. hydraulic system of cutting machine as claimed in claim 1, it is characterized in that, described binder cylinder control valve piece comprises the 2/2-way hydraulicchange-over valve of working connection, and check valve and the choke valve of binder cylinder control valve piece oil circuit control, hydraulic pump group output is connected with 2/2-way hydraulicchange-over valve first end, check valve not-go-end respectively, check valve go side is connected with 2/2-way hydraulicchange-over valve hydraulic control end respectively by choke valve, and 2/2-way hydraulicchange-over valve hydraulic control end, 2/2-way hydraulicchange-over valve the second end are connected with several binder cylinder back cavities respectively.
3. hydraulic system of cutting machine as claimed in claim 1, it is characterized in that, described main hydraulic cylinder control valve piece comprises two-bit triplet hydraulicchange-over valve, and the one-way throttle valve of main hydraulic cylinder control valve piece oil circuit control and two four-way electromagnetic reversing valves, hydraulic pump group output respectively with two-bit triplet hydraulicchange-over valve first end, two four-way electromagnetic reversing valve first ends are connected, two four-way electromagnetic reversing valve the second ends are connected with two-bit triplet hydraulicchange-over valve hydraulic control end by one-way throttle valve, two-bit triplet hydraulicchange-over valve the 3rd end is connected with a pair of main hydraulic cylinder back cavity respectively, two-bit triplet hydraulicchange-over valve the second end leads to fuel tank.
4. hydraulic system of cutting machine as claimed in claim 1, is characterized in that, described system oil pressure controll block comprises two solenoid directional control valves, overflow valve and plug-in mounting valve member.
5. hydraulic system of cutting machine as claimed in claim 1, is characterized in that, being connected by stop valve of a pair of main hydraulic cylinder back cavity.
CN201410415397.0A 2014-08-22 2014-08-22 Hydraulic system of cutting machine Active CN104191027B (en)

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Application Number Priority Date Filing Date Title
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CN104191027B CN104191027B (en) 2016-10-12

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109014364A (en) * 2018-09-29 2018-12-18 安徽东海机床制造有限公司 A kind of hydraulic control shear technique of plate shearing machine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2818031Y (en) * 2005-04-21 2006-09-20 南京埃尔法电液技术有限公司 Hydraulic system of brake style plate shearing machine
US20070028607A1 (en) * 2003-04-17 2007-02-08 Hitachi Construction Machinery Co., Ltd. Hydraulic drive device
UA80276C2 (en) * 2002-05-24 2007-09-10 Metso Lindemann Gmbh Appliance for hydraulic control in hydraulic machine intended for control of operation of machine tool such as press for processing any material (variants)
CN102009220A (en) * 2010-07-12 2011-04-13 周建波 Hydraulic transmission device for plate shearing machine
CN103658808A (en) * 2012-09-10 2014-03-26 黄石华信机械设备有限公司 Automatic detection hydraulic adjusting device of shear angle of plate shearing machine
CN203556939U (en) * 2013-11-26 2014-04-23 山东泰丰液压股份有限公司 Brake type plate shearing machine hydraulic control device with safety protection device
CN203992579U (en) * 2014-08-22 2014-12-10 沃得数控机床(江苏)有限公司 Hydraulic system of cutting machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
UA80276C2 (en) * 2002-05-24 2007-09-10 Metso Lindemann Gmbh Appliance for hydraulic control in hydraulic machine intended for control of operation of machine tool such as press for processing any material (variants)
US20070028607A1 (en) * 2003-04-17 2007-02-08 Hitachi Construction Machinery Co., Ltd. Hydraulic drive device
CN2818031Y (en) * 2005-04-21 2006-09-20 南京埃尔法电液技术有限公司 Hydraulic system of brake style plate shearing machine
CN102009220A (en) * 2010-07-12 2011-04-13 周建波 Hydraulic transmission device for plate shearing machine
CN103658808A (en) * 2012-09-10 2014-03-26 黄石华信机械设备有限公司 Automatic detection hydraulic adjusting device of shear angle of plate shearing machine
CN203556939U (en) * 2013-11-26 2014-04-23 山东泰丰液压股份有限公司 Brake type plate shearing machine hydraulic control device with safety protection device
CN203992579U (en) * 2014-08-22 2014-12-10 沃得数控机床(江苏)有限公司 Hydraulic system of cutting machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109014364A (en) * 2018-09-29 2018-12-18 安徽东海机床制造有限公司 A kind of hydraulic control shear technique of plate shearing machine
CN109014364B (en) * 2018-09-29 2019-12-20 安徽东海机床制造有限公司 Hydraulic control plate shearing process of plate shearing machine

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