Hydraulic press with unloading of base components
FIELD: mechanical engineering.
SUBSTANCE: invention is attributed to equipment for material pressure-shaping. Hydraulic press comprises frame, moving transverse member, beam, upper and lower tools. The frame is made as top and bottom cross-members. Cross-members are interconnected by pillars. The press is fitted with additional hydraulic press. Additional press comprises upper transverse members, tie rods, cylinders with hydraulic fluid, pillars and lower transverse members. Additional press is mounted with possibility to transfer its force to moving transverse member via tie rods and upper transverse members. Furthermore additional press force transfer to lower tool is provided using pillars of additional press, lower transverse member and pins.
EFFECT: press dimensions reduction and durability improvement is provided.
The invention relates to mechanical engineering and can be used in the design of new hydraulic presses, as well as for upgrading existing equipment.
Known hydraulic presses made with the lower cylinders and movable frames (Afellow. Bavassano. Wpinc. Forging hydraulic presses. - M.: Mashinostroenie, 1986, s.43). The cylinders rest on the bottom base, the plungers their pressure on the cross bar of the movable frame. Press with movable bed have a lower height above the floor of the shop.
Also known hydraulic presses, where the circuit with the movable frame applied in combination with conventional fixed bed (Afellow. Bavassano. Wpinc. Forging hydraulic presses. - M.: Mashinostroenie, 1986, s.43). The press has two operating cylinder, one of which is mounted to the upper cross member fixed frame, and the other relies on its lower cross member, the plunger it presses on the lower crossbar of the moving frame. This design concept is usually referred to as "tandem". Press constructed according to this scheme, have smaller dimensions in the plan.
The disadvantage of hydraulic presses is the need to have a great podbresova space to accommodate the lower cross bar of the movable frame. In addition, in the scheme of "tandem" lower cross member fixed to one hundred the ins takes the load from the total effort in the upper and lower cylinders.
The technical result of the invention is to remedy these disadvantages by replacing the moving frame additional gidravlicheskiy pressure, which is embedded in the main. This additional hydraulic cylinders of the press are positioned between the columns of the main hydraulic press. The additional effort of a hydraulic press is transmitted to the movable yoke and is connected directly to the lower tool. Due to this, it is possible to reduce the dimensions of a hydraulic press in height, to unload the lower crossbar of the frame and increase its technological effort.
The offered press is depicted in figure 1, 2, 3, 4, 5, 6, 7, 8, which figure 1 is a General view of the press, in figure 2, a side view, figure 3 is a section along a-A. figure 4, 5, 6, 7 are shown as additional press can be integrated in already existing.
The main press consists of the upper cross member 1, the lower cross member 2, columns 3, movable beam 4, the main cylinder 5, the beam 6, the lower tool 7 and the upper tool 8. The lower cross member 2 and the upper cross member 1 are connected by columns 3 and constitute the bench press. Additional press consists of the upper beam 9, the rods 10, a cylinder 11, columns 12, the lower beam 13, pin 14, the plunger 15. In the piston portion of the plunger is made cylinder return stroke with the plunger 16.
Work side hydraulic the ski press is as follows.
After the working fluid in the main cylinder 5 of their plungers move the movable yoke 4, which, in turn, through the beam 6 transmits the force to the upper tool 8.
After feeding the working fluid into the cylinders 11 additional hydraulic press they move down and thrust through 10 and the upper beam 9 transmit the force on the movable yoke 4, which, in turn, through the beam 6 transmits the force to the upper tool 8. From the bottom through the column 12, a yoke 13 and pins 14 force closes directly on the lower tool 7. The return of the movable beam 4 is returnable cylinder.
As the application of this scheme does not require a large podpisanego space, it is possible to significantly reduce the dimensions of the press. The full force of a hydraulic press is only movable head plate, beam and the lower tool. Unloading parts of the bed can also help to reduce their size and increase durability. The greatest economic benefit from the use of this scheme can be obtained by upgrading existing hydraulic presses to increase work effort. By embedding additional hydraulic presses, similar to that shown in figure 3, it is possible to increase the operating force of the existing equipment, without overloading the base part.
Hydraulic press, aderrasi a frame in the form of upper and lower crossbars, interconnected columns, a movable yoke, a beam, upper and lower tools, characterized in that it is equipped with an additional hydraulic pressure, which contains the top of the bar, rods, cylinders with the working fluid, the column and the lower crossbeam and installed with the possibility of transferring his efforts the walking beam by means of the rods and the upper traverse and lower the tool by means of additional columns hydraulic press, the lower head plate and pins.
SUBSTANCE: casing of the high-capacity hydraulic press operating cylinder used at fluid pressures of up to 32 MPa comprises the walls and bottom welded together. The wall features thickness hw and is furnished with the support flange coupled with the former by a shaped moulding. The bottom features thickness hb=2 hw and is coupled with the wall inner surface by the moulding arranged along the radius. There is a hole to feed operating fluid into the cylinder arranged at the bottom centre. The said moulding is buried into the bottom for hbr=(0.3 to 0.4) hw to form a ledge on the bottom inner face with its size equal to that of the moulding hbr. The moulding radius equals (0.7 to 0.8) hw.
EFFECT: higher reliability with no increase in weight and sizes.
SUBSTANCE: proposed press comprises a frame with two support members, two slides fitted in the guides and two tables that form punching zones. The frame top accommodates the main horizontal shaft. The said punching zones are arranged symmetrically to the plane of symmetry of the said main shaft that is located perpendicular to its axis of rotation. The main shaft runs in bearing supports mounted above the punching zone. The main shaft may represent a crankshaft or camshaft.
EFFECT: increased frame stiffness, higher efficiency of press operation.
3 cl, 9 dwg
FIELD: wood industry.
SUBSTANCE: invention is related to wood industry and can be used in production of laminated wood products. Vertical press for laminated wood products includes a frame with support beam, upper beam, on which vertical and side clamps are installed. The frame includes several separate rectangular frames rigidly connected to the lower support beam and consisting of front and rear uprights and lower and upper horizontal bars. The upper beam is mounted on guides on the upper bars. Rear uprights are rigidly connected with each other by the lower support beam and lower horizontal bars. Front uprights are connected to the lower horizontal bars via axles and to the upper horizontal bars via lock joints connected to each other and to the frame by a locking mechanism. Side clamps are mounted on the guides of the rear uprights and connected to them via hold-down mechanisms. The upper beam with vertical clamps is connected to rectangular frames via lateral movement mechanisms. Vertical clamps are made in the form of hydraulic cylinders and hold-down plates. Hold-down mechanisms are made in the form of hydraulic cylinders and hold-down beams. Lateral movement mechanisms are made in the form of screw mechanisms interconnected via chain gears.
EFFECT: mechanical loading, pressing and unloading of laminated products of various dimensions is achieved.
4 cl, 2 dwg
SUBSTANCE: invention relates to press-forging equipment, particularly to mechanical presses. Sheet-metal press of double-acting contains stand, main actuator connecting rod gear, sheets-clipping mechanism, driver and actuation system. Sheets-clipping mechanism corresponds two four-level mechanism with total output link in the form of external slide block. On stand there are fixed travelling supports and fixing devices. Each of four-level mechanism contains input link in the form of rockers, fixed on shaft, which is rigid to output shaft of gear-motor drive. Fixing device is implemented in the form of pawl, spring, electromagnet and fixed on disc shaft with hollows by form of pawl.
EFFECT: it is provided reduction of mobile links and coupling amount, accurate dwell of external slide block and the ability of disconnection sheets-clipping mechanism during the control of cupping die.
2 cl, 4 dwg
FIELD: technological processes.
SUBSTANCE: press comprises immovable lower plate with flat working surface and movable upper plate. Upper plate has working surface that is convex in cross section. Centre of this surface curvature is located on axis that passes through hinge of drive lever link and hinge that connects lower part of movable plate with slider. Lever link is installed on bed plate with the possibility of rotation. Slider has immovable vertical guide, axis of which passes through axis of drive lever link rotation. Specified link is made with extension, which is installed on the side opposite to axis of its rotation. Slider hingedly fixed to master crank is installed in this extension with the possibility of longitudinal displacement. Axis of crank rotation is installed on crank axis, which is hingedly fixed to upper movable plate.
EFFECT: higher efficiency of press due to reduction of idle run.
SUBSTANCE: hydroscrew nonsliding press hammer contains a bed with the running nut fixed in it. In a running nut the working screw with a flywheel is located. Immediately on a flywheel the upper instrument is fixed. The flywheel has possibility axial and a rotation in the directing executed on a bed.
EFFECT: reliability of a press hammer raises and higher mechanical properties stamped press forgings are ensured.
SUBSTANCE: dual-action screw hydraulic press-hammer comprises lead nut with screw arranged in the foundation, drift-pin and slider with upper stamp. Screw features a lower cylindrical part, slider is linked up with hydraulic cylinder plungers and runs in thrust bearings. Aforesaid slider is furnished with cylindrical bores for screw lower cylindrical part and drift-pin to axially move therein. Said drift-pin is attached to the said screw lower cylindrical part provided with groove receiving half-rings accommodating the slider.
EFFECT: simpler design, higher reliability.
SUBSTANCE: proposed impact device incorporates casing whereto tool can be attached along with load-bearing element arranged between the aforesaid casing and tool and held by the said casing. It also comprises working fluid chamber and said fluid feed and discharge appliances. The impact device comprises a rotary control valve furnished with control channels designed to intermittently direct working fluid from the said working fluid chamber into return channel.
EFFECT: ease of control.
24 cl, 8 dwg
FIELD: technological processes.
SUBSTANCE: automatic press contains connecting rod, working table, die plate and die block. Drive of eccentric shaft is installed above the working table. In the working table mechanisms of stamped tape braking are fixed before and after die block. Automatic press is equipped with mechanism of control of die block closed height. Eccentric bushing is mounted on eccentric shaft journal. Concentricity of bushing is equal to concentricity of shaft journal. Bushing has the possibility of rotation depending on pitch of stamped tape supply and fixation by means of end tooth clutch. At that summary eccentricity of shaft journal and bushing changes from 0 to maximum value. Connecting rod head covers eccentric shaft through bearing. Die plate is movably installed in guides of working table and is joined to connecting rod. In the latter top part of die block is fixed.
EFFECT: higher efficiency of stamping process and simplification of press design and device for tape supply.
2 cl, 2 dwg
FIELD: no-cutting shaping.
SUBSTANCE: device incorporates bed with table and support for flat element and base plate translating by drive. Kinematical linkage between the drive and the base plate includes, at least on rotary lever, its one end being articulated with one end of the short swinging lever to form a cranked lever. The other end of the aforesaid short swinging lever is linked with the base plate. The long rotary lever end, opposite to the cranked lever pivot, is linked with the drive.
EFFECT: higher processing efficiency along with higher accuracy.
3 cl, 10 dwg
FIELD: machining by pressure.
SUBSTANCE: the invention is dealt with the field of machining by pressure and may be used in presses for pressing powder-shaped masses, in particular, the metal powder-shaped masses. The press contains at least one connecting rod, a crankshaft and a connected with it and capable to rotate gear with an eccentric crankshaft drive for driving the unit of the upper plunger. The gear is set in rotation at least by one engine using at least one worm gearing. The press is equipped with electronic control, which is supplied with a function of a reversing mode of operation of the crankshaft. At the press operation a run of the unit of the upper plunger is reversed shortly before reaching of the upper and-or the lower dead point of the eccentric crankshaft drive. The second alternative of operation of the press offers to regulate a run of the unit of the upper plunger so, that the lower dead point of the eccentric crankshaft drive is passing a short way. In result the invention ensures an increase of accuracy of produced pressed items and an over-all performance, and also an increase of the performance index of efficiency of the press operation and expansion of its operational capabilities.
EFFECT: the invention ensures increased accuracy of produced pressed items, over-all performance, increased performance index of the press operation efficiency and expansion of its operational capabilities.
15 cl, 2 dwg
FIELD: press engineering.
SUBSTANCE: press comprises bed with bearing table and guides, eccentric shaft with flywheel, loading member, member for counterpressure, actuator of the loading member, and drive for setting loading member in the initial position before working stroke. The loading actuator of the loading member is made of either spring, or gravitational mass, or air- or fluid-operated cylinder connected with the pressure accumulator. The drive for setting the loading member in the initial position is made of power actuator of the counterpressure member connected with the external power source. The counterpressure member is made of crank-slide mechanism. The flywheel is kinematically connected with the eccentric shaft through the clutch.
EFFECT: enhanced efficiency and simplified design.
FIELD: metal forming.
SUBSTANCE: the invention concerns to the field of metal forming, in particular, to the plate-bending hydraulic presses. The press contains a stand, a bending mechanism consisting of a puncheon located in the upper part of the stand and a lower die. The lower die is located on plungers of hydraulic cylinders with a capability of up and down motion. The stand is made in the form of a frame. The lower die is installed on a sliding block, which is located on the plungers of the hydraulic cylinders uniformly located along the whole length of the sliding block. The pressing force from the hydraulic cylinders is applied in a directed along the axis of the lower die pass through the vertex of angle of the puncheon located along the center of thickness of the stand. In result the invention ensures increased quality of the plates bending, decreased metal consumption and labor input at production of the plate-bending hydraulic presses.
EFFECT: the invention ensures increased quality of the plates bending, decreased metal consumption and labor input at production of the plate-bending hydraulic presses.
FIELD: forge-pressure equipment.
SUBSTANCE: the invention is pertinent to the press-forging equipment, in particular, to designs of mechanical presses. The press contains a drive mounted on a frame, an eccentric shaft, a connecting rod and a slide block. The connecting rod is made in the form of a cylinder with an internal eccentric cylindrical aperture and is located in an internal cylindrical aperture of the slide block. The slide block is installed on the frame with a capability of a translational motion. The eccentric shaft is connected to the connecting rod by means of a shaft mounted on the eccentric with a capability of relative rotation of a stone. The stone is located in a radial groove of the connecting rod with a capability of translational relative motion. The connecting rod is installed on the eccentric with a capability of rotation relatively to the eccentric shaft. The eccentric shaft is installed in the frame with a capability of relative rotation. In result the invention ensures increased productivity of the press.
EFFECT: the invention ensures increased productivity of the press.
FIELD: development and production of the large-sized high-pressure equipment.
SUBSTANCE: the invention is pertinent to the field of high-pressure equipment and may be used at development of the large-sized equipment. The hydraulic press contains two cross girders bound to each other, a hydraulic drive with a piston. It is supplied with an additional cylinder with a piston, which diameter is equal to a diameter of the tightening of the coupled high-pressure chamber. The hydraulic drive has a cylindrical support located along the axis of the piston of the hydraulic drive, which is made in the form of a ring. The piston and the body of the additional cylinder rest accordingly on a cylindrical support and on the piston of the hydraulic drive. The cavity above the piston of the additional cylinder is linked with the high-pressure chamber. In result the invention ensures expansion of technological capabilities of the press.
EFFECT: the invention ensures expansion of technological capabilities of the press.
FIELD: press-forging equipment, particularly screw presses.
SUBSTANCE: press comprises frame with guiding means in which slider, wheel, table and crank shaft are installed. Crank shaft cooperates with slider through connection rods and pins. Wheel is connected with screw through controlled couple. Slider is connected with screw and joined with nut by non-selfbraking thread. Press is provided with plates with power cylinder control, combs with spring-loaded rollers and sliding members installed in guiding means. Crank shaft has four elbows. Two cranks of the shaft have eccentricity lesser than that of two other ones. Slider has grooves. Rod necks of cranks with lesser eccentricity are connected with sliding members through connection rods. Sliding members cooperate with slider pins. Rod necks of cranks with greater eccentricity are connected to plates through control rods. Plates are movably installed in slider grooves and cooperate with combs.
EFFECT: simplified structure, reduced size and increased press reliability.
FIELD: press-forging equipment, particularly screw presses.
SUBSTANCE: press comprises frame with guiding means in which slider, wheel, table and crank shaft are installed. Crank shaft is located below stamping plane. Slider is connected to screw joined with nut by non-selfbraking thread. The nut is secured to frame. Wheel is connected with screw through controlled couple. Crank shaft cooperates with slider through connection rod and pin. Press is provided with controlled eccentric bush connected with electric drive through free-wheeling clutch, conical and worm gearing and linked with slider through connecting rod, sliding member having groove and through pin. Eccentric bush have eccentricity lesser than that of crank shaft.
EFFECT: simplified structure, reduced size and increased press reliability.
FIELD: working metals.
SUBSTANCE: press comprises tool secured to the top and bottom fastening plates. One of the plates is provided with slide that bears on unmovable member via at least one piston unit of the slide drive. The unmovable member is rigidly connected with the unmovable member via at least two guiding columns. The unmovable member is provided with another fastening plate for the tool. The slide is mounted for permitting movement along the guiding columns.
EFFECT: enhanced reliability.
16 cl, 1 dwg
FIELD: plastic working of metals, in particular, sheet bending equipment.
SUBSTANCE: press has bed, die, punch mounted on traverse for reciprocation in guides by means of two columns, drive formed as cylinder whose stem is connected with two levers, each of said levers being connected through shackle with column. Traverse rotates relative to one of columns. Other column is equipped with retainer for attachment of rotary traverse. Press is further equipped with carriage having rollers arranged in parallel with and moving relative to traverse.
EFFECT: wider operational capabilities.
2 cl, 4 dwg
FIELD: plastic metal working.
SUBSTANCE: hydraulic press comprises working cylinder with the plunger, hydraulic station, fluid-pressure make-up pump, pressure pipeline of the working cylinder, and control system. The press additionally has return cylinders, floating clutch, alternative throttle, reverse electric motor, and device for remote control of the molding pressure set in the pressure pipeline of the working cylinder and provided with safety valve with the adjusting screw, cut-off hydraulic distributor, analogue pressure gage, and programmable control device. The adjusting screw of the safety valve is connected with the shaft of the reverse electric motor through the floating clutch. The outlet of the valve is connected with the inlet of the cut-off hydraulic distributor one of the outlets of which is provided with alternative throttle. The outlet of the throttle and second outlet of the cut-off hydraulic distributor are connected to the drain pipeline. The programmable control device comprises programming unit, comparator, and units for control of safety valve, cut-off hydraulic distributor, and make-up fluid-pressure pump provided with the electrical air-operated converter. The outputs of the analogue pressure gage is connected to the input of the comparator whose second input is connected with the output of the controller. The output of the comparator is connected with the inputs of the control unit. The output of the unit for control of safety valve is connected to the windings of the reverse electric motor. The output of the unit for control of the cut-off hydraulic distributor is connected with the windings of the cut-off hydraulic distributor. The output of the unit for control of the make-up fluid-pressure pump is connected to the electrical air-operated converter of the make-up fluid-pressure pump.
EFFECT: expanded functional capabilities.