Hydraulic presses are operated by large pistons driven by high-pressure hydraulic or hydro-pneumatic systems. They are slow moving compared with mechanical and servo presses, and squeeze rather than impact the workpiece. In operation, hydraulic pressure is applied to the top of the piston, moving the ram downward. When the stroke is complete, pressure is applied to the opposite side of the piston to raise the ram.
Speeds and pressures can be closely controlled. In many presses, circuits provide for a compensation control or sequential control, e.g. rapid advance, followed by sequences with two or more pressing speeds. The press can also be regulated to dwell at the bottom of the stroke for a predetermined time, raised at a slow release speed, and accelerated until it reaches original position. When needed, hydraulic press speed can be increased considerably. In many cases, hydraulic presses used for open and some closed die forging presses use microprocessors or computers to control the press operation, for parameters such as ram speeds and positions.
Hydraulic presses are rated according to the maximum force they develop. Presses in use for impression currently range up to 120,000 tons.
Pressmach hydraulic gap frame presses can be supplied with either gib or plunger type guiding which offers enhanced parallel slide motion and eccentric load capabilities. Our gap frame presses are available with a variety of options including:
- Single or multi point cushions
- Open back configurations
- Rotary tables
- Part ejector arrangements
- Quick die change packages
- Other enhancements as offered with
- 4-column presses
Our gap frame presses are economical and are ideal for applications where access is required from three sides.
Pressmach 4-column/ 4-pillar type presses are designed for the high speed production of a wide variety of complex, precise parts. Our press designs feature deep slides offering precision guiding and parallel slide motion. Our 4-column type presses are available with a wide variety of options:
- Single or multi-point cushions
- Shock dampening packages
- Parallel leveling packages
- Quick die change packages
- Integration of automation
- Enhanced press control packages
- Point of operation protection (light curtains, etc)
Our 4-column/pillar press frame design provides greater access to all four sides of the die area for automation, die change, and part loading and unloading.
H Frame Hydraulic Press, frame type welded structure, more stronger than four column type hydraulic press. All welded parts are heat treatment and sand blasting treatment. This press has separate slide guides for better precision. This model hydraulic press is most suitable for car body parts, tractor cover parts production. PLC control, separate hydraulic system and electric control system. Hydraulic cushion and movable table are optional.
Pressmach’s intelligent servo press machines are electric-driven environmentally friendly servo press machine ideal for precision assembly and press fit, such as precision assembly automotive parts, press fitting precision electric connector. Our standard servo press machine is compact designed either in a C frame or bench top type machine structure. This electric servo press machine runs more quietly and cleanly than the conventional hydraulic press and pneumatic press. At the same time, electric servo press is 75~80% power consumption reduced.
With integrate load and position transducers, and wide selection of press modes of “Fixed speed/setting position stop”, “Fixed speed/setting load stop”, “Fixed speed/pressing distance stop”, and accuracy ranges in 0.01 mm, Pressmach’s servo press machine offers a very high level of flexibility for our customers to fit their precision assembly requirements. Our servo press offers our clients a precision true closed-loop control of distance and force, along with quality data processing and comparing for real-time quality evaluation. This makes it possible to clone the sample data conditions and duplicate for mass ongoing production and makes complex assembly work simpler.
Each servo press machine in Pressmach offers a 7/9/13 inches comprehensive HMI to freely input, revise, store and load all parameters such as force, position, distance, and speed. The servo press also comes with a USB interface for downloading or uploading formulations.
Compared to conventional hydraulic press, the advances of the servo hydraulic presses are obvious:
First of all, much faster approaching, pressing and return speed
Speed adjustable during the whole stroke
Pressure repeat accuracy: ±1%
Furthermore, 30%~60% lower energy consumption
Much lower noise level
All parameters programmable on the central color touchscreen
High degree of reliability and minimum need for maintenance during the entire lifetime
Precision force control and real-time production monitoring make the servo-hydraulic press the ideal machine equipment for most of the precision applications such as automobiles parts forming and assembling, motor bearing assembling and press fitting, the electric connector assembly, and press fitting, as well as the precision straightening, trimming, compression molding and so on. As with powerful lower energy consumption, the heated platen servo-hydraulic press is born to be the perfect press machine solution for hot compression molding application with long pressure holding time.
Two Post Presses
Four Post Presses
Deep Draw Presses
Heat Tempering Presses
Hot Platen Presses
Laminating and Multi-Opening Presses
Nick and Break Presses
Pressure Welding Presses
Bending Press – bends or straightens material.
Blanking Press – punches a piece of material sized appropriately for the finished product or follow on processing
Compression Molding Press – applies pressure to a material or combination of materials to bond and/or develop desired characteristics and provide shape
Deep Drawing Press – fairly radical process of forming a metal blank into a cup like shape with a punch pushing the material into a die
Extrusion Press – presses material through a die to form the desired shape
Forging Press – shaping hot or cold metal by compressive forces with an open or closed die configuration
Heat Tempering Press – uses heat and pressure to achieve desired material characteristics
Laminating Press – used pressure with or without binders to adhere two or more layers together
Nick and Break Press – notches the material on one side then applies force from the main cylinder in the opposite direction to snap or break material
Notching Press – removes a portion of material by punching a hole or holes on an outside or inside edge
Punch Press – punches a hole or holes into a part
Stamping Press – a single or multiple step process of forming a blank to its final shape
Stretch Forming – places tension on material past its yield point, and then forms it to the final shape with key properties being minimal stress build-up or spring back
Trim Press - removes excess materials from and outside or inside edge or part