Press Machine

The press is one of the most commonly used presses in industrial manufacturing. It can be used to produce a variety of industrial goods and consumer goods, such as furniture, sporting goods, consumer electronics and household appliances.
 
The size of the mold determines the size of the press to be used. The hydraulic press has the largest mechanical force, because the main task of the hydraulic press is to provide sufficient and stable pressure on work piece with any kind of material. Hydraulic presses can be subdivided into several categories, such as hydraulic deep drawing machines, hydraulic try out presses, etc. Conventional presses are used to mass-produce products, so mechanical strength is not its advantage, but is fast, stable, and easy to operate. The following will introduce several common press types.

Cold & warm forging press

Forging is a metal forming technique that uses compressed local forces. The most common are forging machines or hammering tools driven by electric, hydraulic or compressed air. There are two main types of forging: cold forging and hot forging. Hot forging requires heating the metal above its recrystallization temperature. This may mean that the heating metal temperature is up to 2,300 degrees Fahrenheit. Cold forging generally refers to forging metal at room temperature, although any temperature below recrystallization is possible. In addition, hot and cold forging presses are presses with cold and hot pressing functions.

 

Crank press

The crank press is a crank-based molding press, which changes the shape of the work piece by applying power to the slider through the crank, and is one of the mechanical presses. Types of presses include straight side, back geared, geared, gap, and open back inclinable.

 

Die spotting press

The die spotting press is professional die inspection equipment, which is mainly used in the later stage of die making to inspect and close the dies under pressure. The die spotting mechanism is generally composed of a front and rear fixed bolster, a movable bolster, a pull rod, and a moving bolster driving device.
 
A good die spotting press usually must have some characteristics, including sufficient pressing force, sufficient space for install and open the dies, and controllable speed. At present, the most widely used mold clamping mechanism mainly includes hydraulic direct pressure type, hydraulic toggle type and electric toggle type.

 

Feeders for press

In the forming machine industry, the press feeder is also called a press operator. It loads the work pieces into the feeding tray or tunnel of the press. When the press is running, on-site workers will adjust the press feeder to prevent work pieces jams.
 
With the wide application of CNC technology, most of the presses and press feeders are controlled by the CNC control system, but loading work pieces into press feeder is still manual. However, in some automated factories, such as unmanned factories, the loading, unloading and transportation of work pieces can be controlled by computer programs.

 

Hemming machine

Hemming machine is a kind of sheet metal machinery. In the field of metal forming, hemming machines are similar to seam machines because they are similar metalworking processes in which the sheet metal edge is rolled over onto itself. Using a similar method, there will be some subtle differences between the two. For example, hemming is the process by which the edges are rolled flush with themselves, and the seam joins the edges of the two materials together.
 
Hemming is commonly used to reinforce edges, hide burrs and rough edges and improve appearance. Similarly, seaming is commonly used in canned food in the food industry, amusement park cars, metal roofing, and the automotive industry. Both seaming and hemming are metal forming techniques, and the role of these two is also important for product manufacturers to create the quality of the final product. With a good hemming machine, the processed metal parts have better quality and better functions.

 

Hydraulic press

Hydraulic press is a general term for one of the most commonly used presses in the metal forming industry. It may be used by manufacturers of various industrial goods and daily necessities. The structure of a hydraulic press is a mechanical press using a hydraulic cylinder, which generates huge and sudden pressure. The design of the hydraulic press is based on the Pascal principle, that is, the pressure in the entire closed system should always be kept constant. 
 
Hydraulic presses can be divided into several categories, such as hydraulic deep drawing press, hydraulic tryout press, etc. If compared with try out press and production press, the mechanical force of the hydraulic press will be greater, because the design of this press can exert the required pressure on the work pieces of various materials. Another type of hydraulic press is the C frame hydraulic press, which is a press based on the same mechanical concept. Its design has a bow-like layout similar to the letter C and can usually be operated vertically.

 

Hydroforming press

Hydraulic drive system is a transmission system that uses pressurized hydraulic fluid to power hydraulic machinery. Hydrostatic system is to the transfer of energy from pressure differences, not from the flow energy.
 
Hydroforming presses use a cost-effective way to form ductile metals (such as aluminum, brass, low-alloy steel, and stainless steel) into lightweight and structurally strong parts. The most common application of hydroforming is the automotive industry, which uses it to make work pieces of various complex shapes for use in car body structures. This technology is particularly popular in the high-end sports car industry, and is also often used to form aluminum tubes.

 

Mechanical press

Presses can be divided into mechanical presses and hydraulic presses according to the power source of the slider.
 
The most common mechanical press uses a crankshaft driven by a motor to move the slider, while the hydraulic press uses a hydraulic cylinder to drive the slider. The characteristics of the driving system of the press determine the speed and force of stroke.
 
The advantage of the hydraulic press is that it is a fixed pressure force during the pressing. In a mechanical press, pressure force is greater at lower dead point. Under the same working hours, mechanical press can press more times, and are more commonly used in industrial applications. In addition, most traditional mechanical presses use induction motors, and later servo motors are used as power sources.

 

Pneumatic press

Pneumatic presses are controlled by controlling compressed air. The air is forced into a tube filled with air and applying pressure, causing the press to move downward. After the press stroke ends, the air is evacuated through the valve, and the mechanical spring moves the pump upward again.
 
Pneumatic presses have many advantages in metal manufacturing and processing applications, including power, speed, cleanliness, and low maintenance costs. The structure of the pneumatic press is as simple as the traditional press, but it can produce higher performance. It can be used for pressing, extruding, forming and other tasks in various industrial environments.

 

Punch press

Punching press is a press for cutting holes in materials. It is usually small and can be operated by manually or by numerical control system. Its fixture can accommodate one or two simple molds or even integrated molds.

 

Summary

The current manufacturing trend is still a small amount but diversified production, so in the press industry, it is very important to install a faster die change mechanism to achieve the demand for agile manufacturing.
 
With the further development of machine tool technology and computer science, the trend of intelligent manufacturing from 2013 will promote hydraulic forming to become more intelligent. But what is smart forming, and how to make it happen? These are a big problem. However, we may use the current trends as a reference to shape the future of intelligent forming.

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Video Channel

Straight Side Single / Double Crank Direct Drive Servo Pres / iS1, 2 Series

Straight Side High Speed Precision Press (Crank Type) / Crank Type Apex Series

Hydraulic Die Tryout Presses / LD Series

180° Reversing Type Spotting Press / CDP Series

Hydraulic Deep Drawing Press / ISD-500

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