1000/630 t four-crank double-action close-type stamping press model kb7040

1000/630 t four-crank double-action close-type stamping press is intended for sheet stamping dies as well as for manufacturing big-size components of sheets with application different cold stamping operations.

Main parameters of the stamping press

Technical specifications of the stamping press

Design features of the stamping press

The stamping presses consist of a number of units, mechanisms and systems united as a whole by the frame absorbing the force of stamping.

Frame of the stamping press is split, closed and incorporates table, upper and left upright, crown united as a whole by four tie rods with nuts screwed on them. Sunk keys located in points of joint of the uprights with the table and uprights with the crown prevent shift of the frame components.

It is recommended to perform cold tightening of the frame with the help of special hydraulic device that provides the most accurate and uniform force.

Guides of the slide (8 planes) are arranged in the frame. Oil of the guides — oil centralized.

Drive of the stamping press consists of the gear transmissions and eccentric—link system. Shafts and axles are arranged perpendicular relatively the press front. Lubrication of gear wheels and pinions is performed through flooding.Torque transmission is three-stage. First stage — V-belt transmission from the electrical motor via engagement clutch to the drive shaft. Second stage — high speed helical gear transmission from the drive shaft and reverse block of gears to the wheels block. Third stage — slow speed spur gear transmission from the wheels block to the eccentric wheels. Rotation of the eccentric wheels into different directions and availability of the plungers provide for high accuracy of the slide motion and stability of the press during performance

Main motor with two-support pulley is installed on the motor base plate. Required tightening of the V-belts is performed by displacement of this plate together with the motor and pulley with the help of bolts. To provide quick stop of the flywheel at the motor being off brake of the flywheel is provided for.

Gear of the drive of the stamping press control cam switch is thrown into engagement with the front right eccentric wheel.

Clutch of the stamping press — friction, single-disc air operated, incorporated in the flywheel that freely rotates on two spherical roller bearings to be installed on discharge bushing of the drive shaft.

Engagement of the clutch is performed by compressed air supply to the cavity of the clutch cylinder, besides the friction disc with the linings is clamped between pressing and support discs. Engagement of the clutch is provided by compressed air discharge from the cylinder. By this the piston is to return to the original position by means of the springs

Wearing of the s in process of the performance is compensated by adjustment of the piston stroke.

Lubrication of the air supply head bearings — by grease lubrication through grease cup.

Micro drive is arranged on the front side of the crown and intended for performance the technological operation by the press featured by force up to 3200 kN at s. p. m. value of the slide 0,5—0,8.

Micro drive is powered from its 110 kW electric motor from which torque is transmitted to the drive shaft of the main drive via worm reduction gear and brake of the stamping press. Brake of the press acts as the clutch during performance in the micro inching mode.

Worm pair is mounted in the body of the reduction gear, through which closing of braking torque during performance of the press in ordinary mode is performed.

In process of the press performance in the micro inching mode block shoe brake functions as the brake.

Lubrication — oil centralized.

Thermosensor for control oil temperature is installed in the body of the reduction gear.

Brake of the stamping press — spring-type, normally closed, friction, air-operated. It is installed in cantilever on drive shaft and arranged from front side of the press. It is intended for stopping actuating mechanism of the press.

Hub of the worm gear of the micro drive reduction gear box is the body of the brake.

Unbraking of the brake is performed by compressed air supply to its cylinder. Advance of the clutch disengagement in respect to beginning of the braking is achieved by setting relevant cams of the cam switch controller controlling performance of two valves.

Wearing of the s in process of the performance is compensated by adjustment of the piston stroke.

Drive of the cam switch controllers is intended to provide rotation of the press master controller in synch with the eccentric wheels. The cam switch controller is design to send commands controlling sequence of air distributors response and other bodies of the press control. The cam switch controller ensuring control of the press — «BALLUFF».

Slide of the stamping press is executed as box-shaped and plates welded. Inner cavity of the slide is designed to be hermetic and intended for collection possible oil leakage from the crown and hydraulic units arranged in the slide. The slide travels within eight rectangular adjustable guides, four of that are secured on the slide and four — on the uprights of the frame.

Jointing the slide with the adjustment mechanism is plunger. Supports of the slide are split. Bottom part of each support is hydraulic cylinder to prevent the press from the force overload.

The slide is equipped with die height adjustment mechanism that consists of screw pairs, slow speed worm transmissions, high speed reduction gear with electric motor. Torque is transmitted from the electric motor to the screws freely rotating in the supports. While rotating the screws the slide goes up or down relatively the stationary nuts attached to the plungers. Adjustment mechanism is completed with special system indicating adjusted die heigh value on the main panel of the press.

Adjustment should be performed until complete jointing the die with bottom plane of the slide. By this components of the adjustment mechanism are prevented from damage by jaw clutch.

Extreme positions of the die height adjustment value are to be fixed automatically.

T-slots for attachment upper half of the die are made on the slide base.

Cushion in the slide represents 6 pneumatic telescopic-type cylinders mounted in the inner cavity of the slide. The cushions are featured by max. stroke of 200 mm and create max. force of 2000 kN. The force is transmitted to the pins mounted in the upper die plate via the general plate.

Force of the cushion is set by air pressure. Air pressure is set from the main panel of the press.

Lubrication of friction surfaces is grease.

To prevent the drive of the stamping press and die from damage the slide is equipped with hydraulic overload safeguard incorporating hydraulic supports, hydraulically controlled safety valves, discharge and pressure pipe-lines, tank with the pump.

Restoration of the safeguard to the operating position is possible only in the adjustment mode at top position of the slide stroke.

Upon necessity of imitating response to discharge pressure from the hydraulic safeguard system it is necessary to use device of pressure discharge in the safety valve.

Each support of the slide has oil cushion.

«MAXIMATOR» hydro-pneumatic pump included in the hydraulic station operates from separate pneumatic manifold.

Synchronous drainage from the all hydraulic supports is provided for at overload. Setting the hydraulic safeguard to certain response pressure within 5—10 MN is performed from the main panel of the press.

To eliminate affection mass of the slide and die suspended to it on performance of the main drive of the press as well as to ensure safety for adjustment operations pneumatic counterbalances in the form of 4 cylinders arranged in pairs in the uprights are provided for. Total force of the counterbalances is set by change of compressed air pressure supplied to the press.

Setting air pressure is performed from the main panel of the press. Depending on weight of the upper half of the die relevant air pressure to be supplied is set.

Units of the slide fixing device are arranged in side openings of the uprights and intended to ensure safe work for the personnel during setting the die and within die area of the press.

The stamping press is equipped with moving table rolling out to the front. Moving table is executed as rigid welded frame installed on rollers with rolling contact anti-friction bearings from the top of which removable bolster plate is attached.

The table is accurately fixed with special keys on the working location position (in the press), touching its whole surface with the upper plane of the frame table and attached to it with quick acting pneumo-link clamps.

Before rolling out the from press the table is to be unclamped and lifted 15 mm over the plane of the frame table. Lifting is performed by means of hydraulic cylinders arranged under rollers in the bores in the frame table. Drive of the cylinders is actuated from separate hydraulic station.

The table is set into motion from the geared motor from the main panel.

Four pieces of the moving table clamp are arranged in the table of the press and intended for quick attaching the moving table.

Pneumatic controlled cushion in the table is intended for performing the functions of pre-acceleration, clamping, upsetting, standing (in the up-setting position), ejecting the pieces in the process of technological operation.

Functions of clamping and ejecting are performed by power pneumatic cylinders and functions of pre-acceleration, up-setting and standing — by power hydraulic cylinder to be controlled by electric equipment installed on the hydraulic station of the cushion. Setting the force and stroke of the cushion is performed from the main panel. Extreme positions are limited with sensors.

Pneumatic system of the stamping press ensures performance of the clutch, brake, brake of the flywheel, counterbalances of the slide, pneumatic cushions in the table and the slide, pumps of the hydraulic safeguards, clamps of the moving table, fixing locks of the slide, stoppers of the micro drive, brake of the reduction gear for shut height adjustment. It consists of control, adjusting, devices of the receivers, pipe-lines..

Lubrication system of the press is combined:

1) automatic oil centralized circulating lubrication system consisting of two simultaneously operating blocks:

2) oil non-centralized (manual filling);

3) manual periodical grease lubrication by means of grease guns through grease cups and by manual oiling.

System of oil circulating lubrication system of the press ensures the following:

1) lubricant supply to friction pairs of the press units, collection and filtration of the used oil;

2) effective control and signaling about either normal functioning of the system and about faults in its performance;

3) interlock of the press performance in case of fault of lubrication system operation mode.

Pressure in the lubricating system is created by two oil lubrication pump station. Oil is supplied to the main feeders with device of the cycles number control per time unit through pressure pipe-line and from them — to the intermediate feeders from those oil is to be supplied to the lubricating points in dozed volume.

Pressure in the system is visually controlled with pressure gauges arranged on the oil lubrication station and on uprights of the press as well as automatically by pressure relays Pdmax and PDmin of the lubrication station.

Platforms, guarding banisters, staircases are secured to the frame and ensure safety and convenience in maintenance of the press units.

Die zone is closed with moving side protecting guarding grids for safe operator’s work during performance.

Electric system of the stamping press — designed for connection to industrial mains of 3-phase current.

Control system — electronic. Electric devices — of European firms manufacturing.

Main panel of the stamping press control is arranged on front side of the right upright. It is intended to control modes of the press performance, adjustment operations as well as bears the information necessary for current control for working condition of the press systems and failures diagnostics.

The following devices are grouped in the main panel:

— warning indication of automatic control for serviceability of the pneumatic system, lubrication system and readiness of the press;

— switches and buttons for control of the press performance modes and adjustments.