CN1317121C

CN1317121C - High energy screw press

Info

Publication number: CN1317121C
Application number: CNB2003101054689A
Authority: CN
Inventors: 夏天赳; 夏思淝
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-10-30
Filing date: 2003-10-30
Publication date: 2007-05-23
Anticipated expiration: 2023-10-30
Also published as: CN1611346A

Abstract

The present invention relates to a quick decompression high power screw press which belongs to the equipment for processing heavy materials and is used for die forging and finish forging to replace friction presses and hot die forging presses widely used at present. The quick decompression high power screw press comprises a bed piece, a motor, belt pulleys, fly wheels, screw rods, screw nuts, a slide block return system, a clutch and a compression system thereof, a decompression system, a hydraulic system and a circuit system, wherein the decompression system adopts an electromagnetic hydraulic sensor, and oil pressure in a compression cylinder rises as the technology force is enhanced. When the oil pressure reaches the set value of electromagnet current, the electromagnetic hydraulic sensor acts, and the oil pressure is quickly decompressed by a pilot valve, a main valve, etc. Low pressure oil of 0.2MPa is filled in a lower piston cavity, and spherical cushions are installed between a piston and a friction wafer and between a transmission shaft and a screw rod. The quick decompression high power screw press has the advantages of simple and reasonable whole structure, good sealing effect, high decompression speed, good processing property, easy processing and installation, low cost and high efficiency.

Description

The novel high-energy fly press

One, affiliated technical field

The invention belongs to the heavy material process equipment, a kind of friction press and hotdie forging press that replaces present extensive use is used for the quick depressurisation high power screw press of die forging and forging.

Two, background of invention

Current, the high power screw press that materials processing is already used is the product of Germany in the seventies development in last century.Such forcing press is to be made of lathe bed, motor, belt pulley, flywheel, clutch, screw rod, nut, slide block, kicker cylinder, hydraulic system, drive with the flywheel on the driven by motor crossbeam, be mounted on clutch in the flywheel during work and in time throw off and realize stopping strike and slide block backhaul with screw rod.When it has eliminated A.C. contactor life-span that electric screw press Fraquent start and positive and reverse steering cause short and operation grid power is impacted big shortcoming, do not need as hydraulic screw press, to be equipped with huge Hydraulic Station.These advantages make it become rising fly press.The key problem in technology of high power screw press is that clutch is in time thrown off after reaching specified tonnage, avoids the catastrophic effect of the serious overload of forcing press.The screw tip of moral formula forcing press is adorned an inertia disk and is rotated with screw rod, reaches slipping of clutch after the rated pressure, and screw rod is a significant slowdown, and makes the leading rotation of inertia disk and raise to back down pressure-relief valve, and the clutch hold-down cylinder begins the oil extraction release.In tens milliseconds of stress-relief process, clutch seriously skids needs to consume a lot of frictional works.After mould was beaten and leaned on, because the drive of moment of friction on the inertia of secondary part and the clutch, screw rod also will rotate a certain angle, and forcing press load will continue to rise, and made final hitting power far surpass specified tonnage.Be difficult for limiting because of the hitting power size is subjected to multiple factor affecting, this is extremely harmful to lathe and mould.The patent No. of Patent Office of the People's Republic of China's mandate in 1998 is that ZL93110367.3, name are called a patent of invention of " a kind of high power screw press ", has solved the problems referred to above preferably.But in implementation process, find still to exist following shortcoming:

1, the sealing between sealing ring 7 and the piston 3 is end face seal, and both sizes are very big, guidance quality is relatively poor, guarantee very difficulty of all tight contact.Gap between sealing ring internal diameter and the bearing support is difficult to grasp: if excesssive gap, the hydraulic oil in the secondary oil pocket leaks in a large number, not only causes a large amount of energy losses, and the pressure of secondary oil pocket is crossed the low thrust that can not guarantee end face seal; If the gap is too small, under the effect of hydraulic oil, sealing ring is close to and produces very big frictional force on the bearing support, and piston upwards retreats in the strike process, and sealing ring can not in time be caught up with, and causes the sealing failure.

2, the structure of depressurized system is too complicated.After reaching rated pressure, sensor 13 is opened before this, and through pilot valve 8 risings one segment distance, sealing ring 7 just begins action.Each action all needs certain hour, stress-relief process slow movement.

3, pressure sensor need be equipped with compressed air air pump, gas receiver, pressure regulator valve system, and air pump has noise.Sensor is opened the back because compressed air is not drained immediately, and double hit takes place easily.

4, the slide block compensating cylinder consumes in down stroke than macro-energy, and flywheel slows down obviously.

Three, summary of the invention

The present invention seeks to overcome the shortcoming that existing high power screw press exists, design a kind of overall structure advantages of simple, sealing effectiveness is good, and processing performance is good, processes easily and installs, and is cheap, efficient is high, the quick depressurisation high power screw press of function admirable.

Basic design of the present invention is by lathe bed, motor, belt pulley, flywheel, screw rod, nut, the slide block back haul system, and clutch and pressing system thereof, depressurized system, hydraulic system, Circuits System is formed.Friction plate of hold-down cylinder, clamping piston and the clutch of clutch etc. all is contained under the crossbeam of lathe bed.Adopt the multi-disc wet clutch, utilize technology power that clutch is compressed, the utilization self-lock mechanism guarantees that it is non-slip in strike and stress-relief process.Depressurized system adopts the electromagnetic hydraulic pressure sensor, and the oil pressure in the compressed oil cylinder increases with the increase of technology power, when oil pressure reaches the electromagnet current setting value, and the action of electromagnetic hydraulic pressure sensor, and by fast releases of realization such as pilot valve and main valves.The piston cavity of resorption fills the low pressure oil with 0.2MPa.Mounting spherical mat between piston and friction plate, power transmission shaft and screw rod.

The present invention can obtain following useful effect:

1, the present invention adopts the long annular piston of sealing surface in clutch and pressing system thereof, replaces end face seal with the annular gap sealing, has improved guidance quality and sealing property, and has strengthened the reliability of work greatly.This structure process industrial art performance is good, and processing cost is low; Excellent sealing ability can make the energy that loses because of the leakage of hydraulic oil reduce more than 60%.

2, the release speed is relevant with the speed of main valve open, and the present invention has simplified the structure of depressurized system and made pilot valve and the quality of main valve is all done very for a short time, and the speed of opening has been improved more than the twice.

3, the piston of original structure is pressed on the friction plate of clutch, when flywheel dallies, under the piston weight effect, can produce sizable moment of friction between rotating plate and the driven disc, the energy that quickened the wearing and tearing of friction plate and loss.The present invention fills low pressure oil with 0.2MPa at the piston cavity of resorption, makes piston break away from friction plate fully, can effectively address the above problem.

4, the present invention replaces compensating cylinder with kicker cylinder and controlled, and can alleviate flywheel weight, prolong the life-span of friction plate, and can realize the slide block adjusting microinching, and is very favourable to the installation and the debugging of mould.Increasing ball ring between clamping piston and the friction plate and between power transmission shaft and the screw rod, self-align effect is arranged, can reduce the installation accuracy requirement.

Four, description of drawings

Fig. 1 is a complete machine structure schematic diagram of the present invention;

Fig. 2 is a depressurized system structure chart of the present invention.

Be described in detail by reference to the accompanying drawings structure of the present invention: as shown in Figure 1 and Figure 2, flywheel 1 is installed in lathe bed On the crossbeam. The formation of slide block back haul system is that nut 8 is installed in the guiding neck of slide block 9, the top of guiding neck Drawback piston 11 is installed by section, and drawback piston 11 is installed in the kicker cylinder 12, has back in the bottom of kicker cylinder 12 Journey is advanced, oil extraction road interface 10; Clutch and pressing system thereof are by the compression oil that is installed under the lathe bed crossbeam Cylinder 6, clamping piston 3 and clutch 4 consist of, in the big end of clamping piston 3 and small end and the compressed oil cylinder 6 The hole tightly cooperates, the annular oil cavity 7 formation compression clutch oil cylinders that clamping piston 3 and compressed oil cylinder 6 form Inner chamber also is static pressure thrust bearing; Clutch is the multi-sheet wet-type clutch, the rotating plate of clutch with spline with Power transmission shaft 2 connects, and driven disc connects with screw rod 5 with spline; The formation of depressurized system 13 is at valve pocket 13-Main valve 13-1 is installed in 3, check-valves 13-2 is installed in the main valve 13-1, little resistance is arranged on the check-valves 13-2 Buddhist nun hole 13-2-k; Cored screw 13-4 is arranged at main valve 13-1 top, and it also is the valve seat of check-valves; Valve On the cover 13-3 oil-feed conduit 13-5 is arranged, the upper valve seat 13-7 that installs of oil-feed conduit 13-5, valve seat 13-7 is logical Cross oil-feed conduit 13-5 and be installed on the compressed oil cylinder 6 valve pocket 13-3 is fastening, valve seat 13-7 is upper install single To valve 13-6 and electromagnetic hydraulic pressure sensor; The electromagnetic hydraulic pressure sensor is by electromagnet 13-12, control valve 13-9 and pilot valve 13-8 consist of, 13-11 is aperture. By oil-in 13-10, check valve 13-6, oil-feed Conduit 13-5 and check-valves 13-2 consist of the oil inlet passage of oil cylinder. 14 is the low pressure oil way interface.

Five, the specific embodiment

Embodiments of the invention are as follows:

The present invention is when inactive state, and slide block rests on the extreme higher position, top by the hydraulic oil that is enclosed in the annular kicker cylinder.Clamping piston 3 makes clutch driving disk and driven disc be in releasing orientation under the effect of the 0.2MPa of compressed oil cylinder bottom low pressure oil.During startup, electromagnet 13-12 energising, electromagnetic attraction is pressed on guide's spool 13-8 on the aperture 13-11 by control valve 13-9.Meanwhile kicker cylinder 12 by advance, oil extraction interface 10 is to the fuel tank oil extraction of hydraulic oil supply system, slide block 9 gravitate free-fallings, and drive screw rods 5 forwards by nut 8 and quicken rotation.After postponing certain hour, hydraulic system is by the oil-in 13-10 oil-feed of valve seat 13-7, press oil to back down the oil pocket 7 that check valve 13-6 and check-valves 13-2 enter hold-down cylinder among the 3MPa, promoting piston 3 moves downward, compress the friction plate of clutch gradually, and make screw rod further accelerate to the angular speed of flywheel.Because clutch driven disk has reduced the relative slip and the wearing and tearing of friction plate in conjunction with preceding certain angular speed having been arranged.After this, slide block moves down until the contact forging with normal speed.Before the strike, by travel switch control fuel tap, stop the fuel feeding to check valve 13-6, check valve 13-6 closes voluntarily under the elastic force effect of spring.In the strike process, slide block 9 is obstructed, and screw rod 5 rises, and clutch 4 and clamping piston 3 are also and then risen.The oil that is enclosed in the oil pocket 7 by check valve 13-6 is compressed, and oil pressure improves with balancing processing power.At this moment, 7 one-tenth of oil pockets static pressure thrust bearing.Owing to adopt the multi-disc wet clutch and press the condition of self-locking design, so clutch can not skid in the strike process.A little damping hole 13-2-K is arranged at check-valves 13-2 top, and the epicoele of main valve 13-1 is communicated with its cavity of resorption, and when the oil pressure of cavity of resorption increased with the increase of technology power, the oil pressure of main valve epicoele was also along with raising.Because the diameter of main valve upper end is bigger than the conical valve base diameter that cooperates with valve pocket of main valve lower end, so main valve tightly is pressed on the conical valve base of valve pocket.Mould is beaten and is leaned on when the strike process finishes, and hitting power further rises, and when the product of the area of oil pressure in the oil pocket and aperture 13-11 surpassed electromagnet suction, guide's spool 13-8 was moved to the left, and cone valve is lifted off a seat.This moment, hydraulic oil entered the right chamber of spool, produced bigger thrust, promoted spool and was moved to the left rapidly, and main valve 13-1 epicoele is communicated with atmosphere.The pressure of main valve 13-1 epicoele sharply reduces, so main valve 13-1 all opens in one millisecond under the hydraulic oil effect of main valve 13-1 lower end, has finished stress-relief process.When screw rod 5 is raised to two millimeter, the lower end that is subjected to power transmission shaft 2 stops that the condition of self-locking of clutch is removed, and clutch begins to skid, and the pressure in this moment oil pocket has fallen very lowly, so the frictional work that clutch consumes in release process is very little.Hit to finish the advancing of kicker cylinder bottom, back, middle pressures oil that oil extraction interface 10 enters about 3MPa promotes annular piston 11 risings, slide block begins the backhaul action, simultaneously under the promotion of nut, screw rod is forced to counter-rotating, when slide block returns upper position, stop oil-feed, slide block rests on uppermost position in fig-ure, finishes a working cycles.

Claims

1, high power screw press, be by lathe bed, motor, belt pulley, flywheel, screw rod, nut, the slide block back haul system, clutch and pressing system thereof, depressurized system, hydraulic system, Circuits System is formed, and the formation that it is characterized by the slide block back haul system is that nut (8) is installed in the guiding neck of slide block (9), and drawback piston (11) is installed at the top of guiding neck, drawback piston (11) is installed in the kicker cylinder (12), has backhaul to advance oil extraction road interface (10) in the bottom of kicker cylinder (12); Clutch and pressing system thereof are to be made of the compressed oil cylinder (6), clamping piston (3) and the clutch (4) that are installed under the lathe bed crossbeam, the big end of clamping piston (3) and small end tightly cooperate with the endoporus of compressed oil cylinder (6), the annular oil cavity (7) that clamping piston (3) and compressed oil cylinder (6) form constitutes the inner chamber that compresses clutch oil cylinder, the static pressure thrust bearing when also being strike; Clutch is the multi-disc wet clutch, and rotating plate connects with power transmission shaft (2) with spline, and driven disc connects with screw rod (5) with spline; The formation of depressurized system is that main valve (13-1) is installed in valve pocket (13-3), check-valves (13-2) is installed in the main valve (13-1), cored screw (13-4) is arranged at main valve (13-1) top, oil-feed conduit (13-5) is arranged on the valve pocket (13-3), oil-feed conduit (13-5) is gone up valve seat (13-7) is installed, valve seat (13-7) is installed on the compressed oil cylinder (6) valve pocket (13-3) is fastening by oil-feed conduit (13-5), and valve seat (13-7) is gone up the electromagnetic hydraulic pressure sensor is installed; Constituted the oil inlet passage of oil cylinder by oil-in (13-10), check valve (13-6), oil-feed conduit (13-5) and check-valves (13-2).

2, high power screw press according to claim 1, it is characterized by described electromagnetic hydraulic pressure sensor is to be made of electromagnet (13-12), control valve (13-9) and pilot valve (13-8).

3, high power screw press according to claim 1 is characterized by mounting spherical mat between piston in described clutch and the pressing system thereof and friction plate, power transmission shaft and the screw rod.