Forming presses have evolved over the years, and servo press machines have also been developed for a long time. In this article, we will detail some common problems with servo press machines.
servo press machines usually refer to presses that use servo motors for drive control. This includes servo press machines for metal forging and servo press machines for refractory materials and other industries. Because of the servo motor's numerical control characteristics, it is sometimes widely referred to as a CNC press.
servo press machines drive eccentric gears through a servo motor to realize the slider movement process. Through complex electrification control, the servo press machine can be programmed with arbitrary ram travel, speed, pressure, etc. to achieve the nominal force of the press even at low speed operation.
Servo press machines are classified into servo crank presses, servo link presses, servo screw presses, and servo hydraulic presses, etc.
The general mechanical crank press is driven by eccentric teeth to move the slider crank up and down and the curve is a sine curve. The nominal force is generally reached before the ram runs to the lower stop. The stroke is fixed and non-adjustable. The general hydraulic press can achieve the nominal force at any position of the ram stroke because the pressure is transmitted by liquid. The stroke is adjustable but inefficient.
Servo press machines, on the other hand, control the movement of the ram by means of a motor and combine the advantages of mechanical presses and hydraulic presses by means of pre-programming, so that press production can be realized in any way at any stage of the stroke and the pressure curve can be programmed at will.
The conventional double-disc friction-driven screw presses continuously rotate the friction discs after starting the machine, which consumes a lot of energy, and the striking force is subject to human influence, making the product quality unstable.
As an upgrade of the friction press, in the field of hot forging and refractory molding processing, two kinds of electric screw presses, the switch reluctance screw press and the servo screw press, have appeared in the market according to the different driving motors.
Servo screw presses start the machine, as soon as the control voltage is lost, the motor immediately stops, so the power consumption is almost negligible in the time other than the press implementation of striking action, saving about 60 percent of power than friction presses, and due to the superior performance of servo motors, servo screw presses run more smoothly and can achieve fast striking within a very short stroke.
Refractory material industry: refractory bricks, shaped refractory bricks and refractory balls molding.
Automobile industry: engine component press (cylinder head, cylinder liner, oil seal, etc.) steering component press (gear, pin, etc.) transmission shaft component press, gear box component press, brake disc component, etc.
Motor industry: micro-motor component press-fitting (spindle, housing, etc.) motor components (bearings, spindles, etc.)
Electronics industry: circuit board components press-fit (plug-in, etc.), electronic components.
Home appliance industry: home appliance parts, home appliance parts riveting, etc.
Machinery industry: mechanical parts, automatic group line, wear parts life test, etc.
Servo hydraulic press is used to drive the main drive oil pump by servo motor, reduce the control valve circuit, and control the hydraulic press slide, which is suitable for stamping, die forging, press fitting, straightening and other processes. Compared with common hydraulic presses, servo-driven hydraulic presses have the advantages of energy saving, low noise, high efficiency, good flexibility and high efficiency, and can replace most of the existing common hydraulic presses.
The structure of servo press machine has table type C, bow type, single column type, two column type, three column type and four column type. The table type structure is simple and reliable, with strong load-bearing capacity and small load-bearing deformation, which is a stable and widely used load-bearing structure. The main system of the equipment consists of servo motor, motor controller, reduction drive, brake, position sensor, programmable controller, touch screen, working mechanism, auxiliary mechanism, etc.
The use of table structure, simple and reliable, strong bearing capacity, bearing deformation is small, is stable, the use of a wide range of bearing structure.
Equipment primary system composition: servo press machine unit, control system, display and other components.
servo press machine principle: servo motor drives fine ball screw through synchronous belt to complete the pressure spindle orientation control; pressure spindle front-end equipment high sensitive pressure sensor, can real-time detection of pressure spindle load; control system real-time collection of orientation and load data, so as to complete the fine press online quality management technology.
Drive equipment --- servo drive
Transmission equipment --- synchronous wheel structure, fine ball screw
Pressure output --- pressure spindle
Bearing sets --- ball bearings, self-lubricating bearings, etc.
Pressure sensor --- external type, beautiful structure, no interference of electric wire
Housing --- sheet metal spray paint
Control system --- closed loop control
Screw presses can be used in many industries, forging industry, resistant material industry, etc. In recent years, with the development of science and technology, the market demand for high-quality, high-precision, low-priced products is growing, and the demand for processing equipment for manufacturing products is becoming more and more abundant, thus making the international competition in the manufacturing industry more and more intense.
The structural characteristics of servo press machines are:
Small structure, light weight, functional compounding and integration.
Extend the life of components and improve the reliability of the system.
Reduce hydraulic vibration and noise.
Combined with electronic technology to improve the control capability.
Since servo press machines have many advantages that cannot be surpassed by traditional presses. At present, Japanese enterprises in the new presses, 99% is to purchase servo press machines, it can be seen that the future servo press machines will definitely replace the traditional presses and become the core of plastic processing equipment.
servo press machine development history, servo press machines are widely used in developed countries, Japan AMINO (AMINO), Japan Komatsu (KOMATSU), Germany SCHULER (SCHULER) and other press manufacturers have launched a variety of transmission structure, different specifications of the servo press machine, almost monopolizing the market of all high-end presses, access to huge economic benefits. However, due to the rapid growth of the national economy, the internationalization of the market and the rise of people's consumption views, the streamline and personalized requirements for manufacturing products, various industries have also introduced a lot of foreign manufacturing equipment. Due to the high precision and good working environment of the manufactured products of servo press machines, and also the advantage of energy saving, which is more meaningful to the current domestic saving society, it is bound to be recognized and widely used in the near future, and it is also believed that it will replace the existing presses in the forming field in the near future. servo press machines are developed from the following aspects.
The first thing to look at the servo press machine precision is not high. Precision refers to the accuracy of the pressure and position to reach a specific point to stop. He is related to the resolution of the drive, the resolution of the pressure transmitter, the accuracy of the servo motor and the response speed of the response equipment. servo press machine through the mature set of servo motor and drive integrated control, its repeat accuracy is getting higher and higher, the use of a wider and wider range, if you need high precision servo press machine, choose servo press machine will focus on the configuration
The second look at the structure of the servo press machine and servo press machine manufacturers of the general structure is not a single, common four-column, single column, arch, horizontal, frame hydraulic press, four-column economical and practical structure, single column, arch structure is easy to operate, the level of operation found in the longer than other products, frame type in the large tonnage dominant, so the choice of structure still needs to be based on product size and structure
Servo press machine functions include forging, stamping, assembly, assembly, pressing, forming, flanging, shallow pulling, etc., different functions often have different structures, so you also need to choose the right servo press machine according to their own circumstances. Product process requirements
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