CN102179950A

CN102179950A - Novel oil press

Info

Publication number: CN102179950A
Application number: CN2010102424359A
Authority: CN
Inventors: 危毅; 文彬; 林吉钧
Original assignee: HUNAN XIELI HYDRAULIC CO Ltd
Current assignee: HUNAN XIELI HYDRAULIC CO Ltd
Priority date: 2010-08-02
Filing date: 2010-08-02
Publication date: 2011-09-14

Abstract

The invention discloses a novel oil press which comprises a motor, an oil pump, a charging valve, a sequence valve, a reversing valve, a remote pressure-regulating valve, a pilot operated check valve, an overflow valve, a working oil cylinder, an oil tank and a pressure gage, and is characterized in that the working oil cylinder is a single-acting piston type oil cylinder and has cavities (A1, A2 and A3), the piston rod of the working oil cylinder is further internally provided with a small piston rod, the small piston rod is fixed on a working oil cylinder base and form a small piston cylinder together with the inner circle of the piston rod. The novel oil press has the advantages of simplified structure, good operational performance, high working efficiency and strong economic and practical properties.

Description

Novel hydraulic press

Technical field

The present invention relates to a kind of novel hydraulic press, particularly a kind of novel hydraulic press that adopts particular job oil cylinder.

Background technology

Hydraulic press is a kind of pressing process that is applicable to plastic material, as punching press, bending, alignment, manufacturing process such as press-fit.Existing hydraulic press mainly is made up of main frame and actuating unit two large divisions.The hydraulic press host machine part comprises fuselage, master cylinder and charging device etc.Actuating unit is made up of fuel tank, high-pressure pump, low voltage control system, motor and various pressure valve and direction valve etc.Actuating unit under the control of electric device, control pump and oil cylinder and various hydraulic valve.And hydraulic press is in when work, and it is reasonable to require that speed is low and steady, idle stroke advance and retreat speed is fast, the speed rate conversion is steady, system effectiveness is high, power utilization is lacked in heating.Then its operating principle is: F.F., and---worker advances, and---pressurize---rewind down---stops.And the prior oil pressure machine to the control mode that conversion and F.F., the worker of fast jogging speed advances these two actions mainly is: volume throttle grverning and servo control.Former structure is simple, but adjusting function is not good, and efficient is low and power loss is big; Latter's adjusting function is good, but the structure relative complex, and the cost height, safeguard inconvenient.

Summary of the invention

Technical problem to be solved by this invention is: solve the problem that above-mentioned prior art exists, and provide that a kind of designs simplification, serviceability are good, high efficiency, novel hydraulic press that economic and practical is strong.

The technical solution used in the present invention is: this novel hydraulic press, comprise motor, oil pump, prefill valve, sequence valve, reversal valve, remote pressure regulating valve, hydraulic control one-way valve, overflow valve, operating cylinder and fuel tank, Pressure gauge, feature of the present invention is: operating cylinder is the single-acting piston type oil cylinder, total A1, A2, three chambeies of A3, also has a small piston rod in the piston rod of operating cylinder, small piston rod is fixed on the base of operating cylinder, interior round-formed pillar plug cylinder of it and piston rod.

In the technique scheme, oil pump by reversal valve to the operating cylinder fuel feeding, wherein, the A1 chamber in-line of operating cylinder links to each other with reversal valve by hydraulic control one-way valve, and be connected with first overflow valve, behind the in-line series sequence valve of operating cylinder A2 chamber, in parallel with A3 chamber in-line, be connected with reversal valve by S type check valve again after the parallel connection.

In the technique scheme, operating cylinder A2 chamber also links to each other with auxiliary fuel tank by prefill valve.

In the technique scheme, reversal valve adopts H type meta function reversal valve.

When hydraulic press of the present invention was worked, fluid at first entered the A3 chamber of operating cylinder, and A3 chamber sectional area is little, made operating cylinder big piston bar do the motion of at a high speed low active force.When big piston bar contact workpiece bore load, the A3 cavity pressure increased, and sequence valve is opened, and fluid enters the motion that the A2 chamber begins to do low speed, big active force, realizes the conversion of fast jogging speed.When machining when needing pressurize, hydraulic pump stops to A1, A2 chamber fuel feeding, and this moment, auxiliary fuel tank to A2 chamber fuel feeding, replenished the pressure loss in A2 chamber by prefill valve.After whole machining, the oil-feed of A1 chamber, the big piston bar is upwards return fast.

This novel hydraulic press, no speed control loop and servo control system provided by the invention.Just in the piston rod of operating cylinder, additionally increased by a small piston rod, interior round-formed pillar plug cylinder of it and big piston bar, and small piston rod is fixed on the cylinder bottom.When machine works, because the effect of sequence valve, fluid flows into the A3 chamber earlier and realizes the F.F. action; When the piston rod contact workpiece had load, the A3 cavity pressure increased, and sequence valve is opened, and fluid then carries out the A2 chamber through sequence valve, realized worker's precession work; Because the system reversal valve adopts " H " type meta function, operating cylinder becomes quick condition, can pin at an arbitrary position, and the A2 chamber is connected with auxiliary fuel tank by prefill valve, has just finished promptly to stop pressurize and move; When the needs rewind down, get final product from the oil-feed of A3 chamber.Therefore, this novel oil pressure will not only structurally have been oversimplified the prior oil pressure machine, and better than existing hydraulic press on serviceability.When really having realized hydraulic press work, speed is low and steady, and idle stroke advance and retreat speed is fast, and the speed rate conversion is steady, the system effectiveness height, and heating is few, and power utilization is reasonable.

Description of drawings:

Fig. 1 is a hydraulic schematic diagram of the present invention;

Fig. 2 is an operating cylinder structural representation of the present invention;

Fig. 3 is a profile assembling front view of the present invention;

Fig. 4 is the side view of Fig. 3;

Fig. 5 is the vertical view of Fig. 3;

Fig. 6 is a prior art hydraulic press hydraulic schematic diagram.

The accompanying drawing marking explanation:

1---motor 2---oil pump 3---reversal valve

4---hydraulic control one-way valve 5---S type check valve 6---sequence valves

7---operating cylinder 8---A1 chamber 9---A2 chambeies

10---A3 chamber 11---cylinder pedestal 12---small piston rods

13---piston rod 14---prefill valve 15---first overflow valves

16---second overflow valve 17---remote pressure regulating valve 18---main fuel tanks

19---auxiliary fuel tank 20---Pressure gauge 21---frames

22---small piston rod hold-down nut 23---oil cylinder hold-down screw 24---valve groups

25---panel 26---table top 27---table top hold-down screws

28---motor hold-down screw 29---support.

The specific embodiment:

Referring to Fig. 1, Fig. 2, novel hydraulic press of the present invention, comprise motor 1, oil pump 2, prefill valve 14, sequence valve 6, reversal valve 3, remote pressure regulating valve 17, hydraulic control one-way valve 4, S type check valve 5, operating cylinder 7, first overflow valve 15, second overflow valve 16 and main fuel tank 18, auxiliary fuel tank 19, Pressure gauge 20, operating cylinder 7 is for being the single-acting piston type oil cylinder, total A1, A2, three chambeies of A3, also has a small piston rod 12 in the piston rod 13 of operating cylinder, small piston rod 12 is fixed on the base 11 of operating cylinder, interior round-formed pillar plug cylinder of it and piston rod 13.Oil pump 2 passes through reversal valve 3 to operating cylinder 7 fuel feeding, wherein, the A1 chamber in-line of operating cylinder links to each other with reversal valve 3 by hydraulic control one-way valve 4, A1 chamber in-line also is connected with first overflow valve 15, behind the A2 chamber in-line series sequence valve 6 of operating cylinder, in parallel with A3 chamber in-line, be connected with reversal valve 3 by S type check valve 5 again after the parallel connection.Operating cylinder A2 chamber also links to each other with auxiliary fuel tank 19 by prefill valve 14.Reversal valve 3 adopts H type meta function reversal valve.

As can be seen from Figure 1, when hydraulic press starts, realize F.F. action, this moment, in-line was: hydraulic pump, and---reversal valve---S type check valve---A3 chamber, because the sectional area in A3 chamber is little, then operating cylinder just can be realized low thrust, high-speed action.Behind operating cylinder piston rod contact workpiece, piston rod is subjected to load, and the A3 cavity pressure increases, the Direct Action Type sequence valve is opened, in-line fluid then enters the A2 chamber through the Direct Action Type sequence valve, because A2 chamber sectional area is big, then operating cylinder is realized the action of high thrust, low velocity.The auxiliary fuel tank of oil cylinder upper end can carry out repairing to the A2 chamber by prefill valve, replenishes the pressure loss in A2 chamber, improves the effect of oil cylinder pressurize.After processing action was finished, in-line was: hydraulic pump, and---reversal valve---hydraulic control one-way valve---A1 chamber, the fluid in A2 chamber flows into auxiliary fuel tank by prefill valve, realizes the rewind down action.

As can be seen from Figure 2, this single action piston cylinder is different with conventional piston cylinder, also has a small piston rod in the piston rod of this oil cylinder, and an end of small piston rod is fixed on the oil cylinder cylinder bottom, an interior round-formed pillar plug cylinder of this small piston rod and big piston bar.Little many in sectional area ratio A2 chamber, A3 chamber, when fluid entered the A3 chamber, the big piston bar was done the motion of high speed low thrust downwards; When fluid entered the A2 chamber, the big piston bar was done the low-speed high-thrust motion downwards; When fluid entered the A1 chamber, the big piston bar was upwards made high-speed motion.

Claims

1. a novel hydraulic press comprises motor, oil pump, prefill valve, sequence valve, reversal valve, remote pressure regulating valve, hydraulic control one-way valve, overflow valve, operating cylinder and fuel tank, Pressure gauge; It is characterized in that: operating cylinder is the single-acting piston type oil cylinder, total A1, A2, three chambeies of A3, also have a small piston rod in the piston rod of operating cylinder, small piston rod is fixed on the base of operating cylinder, interior round-formed pillar plug cylinder of it and piston rod.

2. novel hydraulic press according to claim 1, it is characterized in that: oil pump by reversal valve to the operating cylinder fuel feeding, wherein, the A1 chamber in-line of operating cylinder links to each other with reversal valve by hydraulic control one-way valve, and be connected with first overflow valve, behind the in-line series sequence valve of operating cylinder A2 chamber, in parallel with A3 chamber in-line, be connected with reversal valve by S type check valve again after the parallel connection.

3. novel hydraulic press according to claim 1 is characterized in that operating cylinder A2 chamber also links to each other with auxiliary fuel tank by prefill valve.

4. novel hydraulic press according to claim 1 is characterized in that reversal valve adopts H type meta function reversal valve.