Exceeds the heavy stamping industry’s demands for production, speed, and efficiency
Half-inch-rated automotive-class press (200 – 1000 Ton)
Available in one, two and four point eccentric gear drive configurations, the Heim Maxi-Stamper line of straight-side presses represent the cutting edge of press engineering and design. This press will help contribute to the growth of your company by providing consistent quality part production for many years to come.
The press is a fabricated steel design using heavy main plate for each structure. The crown, bed and slide are a welded steel plate box type construction. Our computer aided design pays particular attention to strengthening areas in critical sections where load is being transmitted and where deflection can be reduced. Our fabrication designs provide for maximum rigidity and minimum deflections for the various directional stresses that a press can be subjected during stamping operations. Four tie rods pass through the structures and are pre-stressed to hold the structures in compression. The bed design has a deflection of .0015” per foot of width at full load on a tool covering 2/3 of the bed area symmetrically spaced on the left to right and front to back center lines.
The eccentric gear drive is housed in an enclosed crown structure and running in a bath of oil. Spur type eccentric gears with helical intermediate gears are used on single and two point presses and four point straight side presses. An eccentric strap, a solid steel plate connection, with replaceable bronze bearings connects the eccentric gear to the slide structure through a ball and socket connection.
Combitation Air Cluch and Brake
The quill mounted flywheel clutch is controlled through a solenoid operated dual air valve. The heavy duty low inertia combination clutch and brake withstands the stress of frequent stop and starts and repeated heavy shocks. The clutch is sized and selected for maximum capability and high rotational energy and efficiency in dissipating heat that may be generated during operation. The quill mounting of the clutch to the flywheel offers maximum safety while offering ease of maintenance and replacement of normal wear items such as friction pads. Liners are replaced without removing the flywheel or other major components.
Eccentric Gear Drive
With an eccentric gear drive the eccentric is an integral part of the main gear that rotates on a stationary pin supported in the crown. This gearing is very compact and with the eccentric being integral with the gear, torque is being transmitted directly from the gear to the eccentric eliminating all torsional load from the shaft. The drive rating is .500” from bottom stroke.
The adjusting screw is threaded into the barrel section of the connecting rod. The ball end of the adjusting screw is fitted into the socket connection attached to the slide structure. Ball and socket connection allow forces to be distributed evenly that can provide greater off center loading allowing for a higher snap through reverse loading during blanking. Also housed in this assembly is the slide elevation adjustment device. A slide adjustment drive motor is mounted within the slide structure. Positive mechanical stops establish the limits of adjustment. A digital slide position indicator provides accurate display of slide position to .001”.
Hydraulic Overload System
The hydraulic overload system minimizes costly down time, and eliminates unnecessary damage to the press and tooling. The overload device incorporates a hydraulic cylinder located in the slide under the slide adjusting mechanism. The overload protection system is controlled by setting the desired trip tonnage through an air pressure regulator to the cylinder of the overload valve assembly. When an overload is encountered pressure increases in the cylinder to the setting of the preset regulator. A relief valve opens allowing oil to Simultaneously as the oil is dumped, a signal is sent to disengage the clutch and to stop the press, while the slide travels approximately 1/2” (overload stroke) into the void left by the oil displacement avoiding an overload condition.
All Maxi Stampers are equipped with adjustable air counterbalance cylinders to support the weight of the slide structure and weight of upper die tooling. Adjustment of the air pressure allows for differences in upper die weight, insures smooth operation through the entire press stroke and reduces breakthrough shock during blanking operations. Carbon fiber cylinders, an innovative Heim design, provide maximum performance with minimal component wear and maintenance.
Wide non-metallic way liners are bolted to theslide. All gibs are adjustable to insure accuratealignment of the slide in front to back and rightto left directions. Ease of adjustment is assuredby use of a number of clamping and adjusting screws. Extra long gibs having greater bearing area retaining the slide fully and accurately in any position of the slide stroke and adjustment.
The press is furnished with an automatic recirculating oil lubrication system which lubricates all major bearings and components in the drive system as well as gibs and adjusting screws. The systems automatically cycles the lube pump and divides the flow of oil in the correct proportions to each required point. The system continuously monitors for electrical failure, pump failure, low oil level and line pressure. The master control panel flashes a warning that indicates a lubrication failure and stops the press.
Air pressure settings for the press can be easily adjusted from floor level. Rugged glycerin filled gauges accurately display counterbalance and clutch brake air pressure. These controls as well as filters, regulators, lubricators and other air control elements are located in a control box mounted on a column of the press.
Solid State Press Control
Two separately powered dual microprocessors incorporate all the ANSI, OSHA and CSA safety requirements for press control reliability. Controls are housed in a Nema 12 enclosure. The press controller monitors and governs all press functions. The main key lock selector switch has Off-Inch-Single Stroke-Continuous mode of operation. The operator control bar is supplied with two guarded run/inch buttons, emergency stop palm button and prior action push button. Control also features forward/reverse switch, brake monitoring and stroke counter and touch screen display for internal and external diagnostics. The microprocessor has ample inputs and outputs along with limit switches for interface of ancillaries.
Installation and Training
When shipped, the machine must be disassembled and placed on flat bed trucks for transport. The Heim Group Service Engineers will install your press (excluding rigging) at your facility and provide training for your operators. Maxi-Stamper presses meet ANSI-B11.1 2005 press and electrical standards in accordance with section 4.
Point of Operation Guarding
Point of operation safety guarding or devices are the sole responsibility of the employer (user) of the machine as provided in ANSI B11.1 2001 as published by theAmerican National Standards Institute Inc., 1430 Broadway, New York, NY and OHSA regulations.