High Precision Servo Hydraulic Press Machine For Minting

coin
10G-GOLD-BARS
Coin Mint Line

The bullion manufacturer will stamp the purity and logo of the metal on the metal ingot, reflecting the quality and the advertising of the brand. Servo hydraulic press machine has become popular hydraulic press during the last few years. Compared with the traditional hydraulic press, it has great advantages. This article will explain the differences in detail.

Benefit analysis of servo-hydraulic press machine

1. Improving production efficiency

Servo hydraulic press machine adopts Siemens and PLC control system to replace conventional relay control,with higher control accuracy, more flexible and diversified production process, and wider application range. During the production process, the stroke and pressure of the equipment can be adjusted on the touch screen page, which is fast, accurate, and easier. Therefore, the production efficiency of the servo-hydraulic press is 30-50% higher than that of the conventional hydraulic press machine.

 

2. Improving product processing accuracy

The servo-hydraulic press uses a servo drive to control the proportional pressure and a proportional flow valve to control the hydraulic system. It uses a grating ruler and pressure sensor to monitor the position of the template and the pressure of the cylinder, forming a closed-loop control to make the control accuracy higher, and the repeatability of the template operation can reach ±0.01mm. On the premise that the product blank size accuracy is ±0.01mm, the product size accuracy being within the range of ±0.01mm can ensure more stable product quality.

 

3.Stable equipment performance

Our servo hydraulic press is equipped with a German Siemens control system, and the processor’s operating frequency is below 1ms. The hydraulic system is controlled by imported famous brand proportional pressure and proportional flow valves, with stable movements and high precision.

Adopting grating ruler and pressure sensor for position and pressure detection, forming a closed-loop control with the control system, making the equipment performance more stable and accurate.

 

4.Saving mode adjustment time

The hydraulic press adopts servo drive system control and numerical control touch screen, and the system has the storage function of production process parameters. Each time the adjusted process parameters are stored in the system, and the process data can be directly transferred from the system during the next production, the production can save the time of mold adjustment and greatly improve the production efficiency. Especially for the production of small batches of products, it is more advantageous if the mold is changed frequently, which can increase the production efficiency by 20~40%.

Parameters and comparison of CNC four-column hydraulic press with the conventional hydraulic press

servo hydraulic press machine
hydraulic press machine

Parameter comparison

Servo hydraulic pressConventional hydraulic press
ItemUnitHTSe-1000SAHTHe-500SAItemUnitHTHF-1000SAHTH-500SA
Nominal forceKN100005000Nominal force of main cylinderton1000500
System pressureMpa2525Maximum system pressureMpa2525
Maximum stroke of movable tablemm250150Maximum stroke of movable tablemm150150
Height of working platform from groundmm600450Height of working platform from groundmm600450
Opening heightmm1000840Opening heightmm1000840
Travel speed of movable worktableHurry downmm/s≥170210Upward speed of movable worktablemm/s125120
Workmm/s0.5-106-18Return speed of movable worktablemm/s12585
Returnmm/s≥170210Effective area of worktableLxRmm900600
Effective area of worktableLeft and right (in column)mm900600FxBmm950560
Front and back (edge)mm950600Machine dimensionsL-Rmm17401480
Machine dimensionsL-Rmm19001600F-Bmm18601520
L-Rmm18001430Heightmm32002380
Heightmm33002400Motor powerkw2815

Servo four-column hydraulic press compared with conventional hydraulic press

S/N Project comparison Servo four-column hydraulic press Conventional hydraulic press
1 Equipment structure and processing capacity The four-column hydraulic press has a three-beam and four-column structure. The overall fuselage is composed of a lower template, an upper beam, a workbench and four uprights. The main cylinder is installed in the upper template, and the movable crossbeam is connected with the main cylinder piston as a whole. It moves up and down with the column as the guide, and transmits the force generated in the main cylinder to perform pressure processing on the parts. The computer servo system control is added to the four-column hydraulic press, which greatly improves the production efficiency and product accuracy of the equipment. Frame type hydraulic press, integral frame type structure. The main cylinder is installed in the lower template, the movable beam and The piston of the main cylinder is connected as a whole, and it moves up and down with the small column as the guide, and transmits the force generated in the main cylinder to perform pressure processing on the parts. Use conventional relays for control.
2 The difference between the overall structure The main added components of the servo hydraulic four-column hydraulic press: computer numerical control system, grating ruler, proportional flow valve, proportional pressure valve, pressure sensor. Conventional frame hydraulic press: conventional relay control
3 Improve production efficiency Servo hydraulic press adopts mature computer control system to replace conventional relay control, with higher control accuracy, more flexible and diversified production process, and wider application range. In the production process, the stroke and pressure of the equipment can be adjusted on the CNC computer page, which is fast, accurate and more convenient. Therefore, the production efficiency of the CNC hydraulic press is 30-40% higher than that of the conventional hydraulic press. Conventional hydraulic presses can only be produced according to the traditional production process, and the pressure adjustment is through the manual adjustment of the control valve to adjust the equipment pressure. Usually, when the mold is installed for the first time, a lot of man-hours are wasted when adjusting the production process until the qualified product is produced, and a lot of waste products may be incurred during the same process of debugging.
4 Improve product processing accuracy The servo hydraulic press uses a servo drive system to control proportional pressure and a proportional flow valve to control the hydraulic system. It uses grating rulers and pressure sensors to monitor the template position and cylinder pressure, forming a closed-loop control to make the control accuracy higher, and the template operation repeatability can be accurate. Achieve ±0.01mm. On the premise that the product blank size accuracy is ±0.01, the product size accuracy is within the range of ±0.01 to ensure more stable product quality. The pressure control of a conventional hydraulic press is controlled by a hand-adjusted hydraulic control valve through a relay. It is difficult to adjust the pressure to the appropriate production pressure at the moment, and there is no grating ruler and pressure sensor to monitor the template position and cylinder pressure, so the pressing accuracy is relatively low.
5 Stable equipment performance Our servo hydraulic press is equipped with a German Siemens control system, and the microprocessor operating frequency is below 1ms. The hydraulic system is controlled by imported famous brand proportional pressure and proportional flow valves, with stable movements and high precision. Adopting grating ruler and pressure sensor for position and pressure detection, forming a closed-loop control with the control system, making the equipment performance more stable and accurate. Conventional hydraulic presses are controlled by relays and manually adjusted pressure hydraulic valves. The performance of the equipment is worse than that of CNC hydraulic presses.
6 Save adjustment time The servo hydraulic press is controlled by a servo system, and the system has the function of storing production process parameters. Each time the adjusted process parameters are stored in the system, and the process data can be directly transferred from the system during the next production, the production can save the time of mold adjustment and greatly improve the production efficiency. Especially for the production of small batches of products, it is more advantageous to change the mold frequently, which can increase the production efficiency by 20-40%. Conventional oil presses have no storage function for production process parameters, so the process parameters must be re-adjusted every time the mold is reinstalled. Waste production time, especially for the production of small batches of products, the effect is more obvious.

Main features of HTSe servo hydraulic press

Overall part of the bed

1. The three-beam and four-column structure has high smooth operation and no impact, which greatly extends the life of the machine and mold.

2.Select computer with grating ruler to detect, the template position accuracy can be detected as high as ±0.01mm or more, and the repeat accuracy can reach ±0.01mm, ensuring stable product quality.

3.The low-pressure safety protection function of the mold greatly extends the service life of the mold and the machine.

4.The tie rods are made of 40Cr or 45 steel quenched and tempered and plated with hard chromium surface treatment. It is more resistant to fatigue, alternating load and abrasion resistance, and prolongs the service life of the machine.

5.The fastener screws of the machine are hexagon socket head screws above grade 12.9, and important fasteners such as oil cylinders and hydraulic parts use high-strength screws (grade 12.9).

6.T-slot template can be processed to facilitate mold installation and replacement.

1

Hydraulic control part

1.The use of Hytec or German Echole gear pumps ensures that the machine has a stable hydraulic motive force during the working process.

2.The hydraulic components and hydraulic seals are imported or international famous brand products, so that the entire hydraulic System performance is effectively guaranteed.

3.Proportional pressure and proportional flow control, the working pressure, pressing speed, and stroke range of the hydraulic press can be set according to work needs to ensure high system control accuracy.

4.The main cylinder is equipped with a pressure sensor to control and monitor the pressure of the main cylinder.

Hydraulic Press Machine touch screen

Servo system, electrical control part

1.Siemens control system, large-screen TFT color liquid crystal display, the text display is clearer.

2.Siemens processor structure, microprocessor operating frequency below 1ms.

3.The configuration of world-famous electrical components is safe and reliable, and the action response is rapid.

4.Grating ruler position detection, computer page setting display, convenient and simple operation.

5.Good man-machine interface and convenient parameter setting, with 120 sets of mold process parameter setting and storage functions.

6.Using famous brand electrical components, precise control and low failure rate.

Main features of HTSe servo hydraulic press

Use Siemens touch screen and PLC control system instead of relay control, high control accuracy

Servo hydraulic press adopts Siemens control system to replace conventional relay control, with higher control accuracy, more flexible and diversified production process, and wider application range.
The pressure control of the servo hydraulic press can be adjusted on the CNC computer page, which is fast and accurate, and the adjustment is more convenient. The servo hydraulic machine avoids mold damage that may be caused by manual adjustment of pressure relays and pressure valves in conventional systems. The pressure adjustment of a conventional hydraulic machine is to adjust the pressure of the equipment by manually adjusting the control valve. Usually, when the mold is installed for the first time, a lot of man-hours are wasted when adjusting the production process until the qualified product is produced, and a lot of waste products may be incurred during the same process of debugging.
Our servo hydraulic machine is equipped with a large-screen TFT color LCD display, which makes the text display clearer.
Multi-stage pressure setting, there is sufficient space for process adjustment, and the process curve display function of set parameters (pressure, flow) is very beneficial to process adjustment.
The page operation has password protection and optional keyboard lock function to avoid the problem of unauthorized modification of process parameters, which is very beneficial to safe production and reduction of reject rate. In addition, this machine has 120 sets of mold parameter storage functions.

Adopt double proportional hydraulic control technology

The use of proportional pressure and proportional flow control technology can make the various actions of the hydraulic press more stable and accurate, thereby ensuring the accuracy of the product. In the production of metal hardware and other parts, due to the phenomenon of metal springback during the pressing process, the servo hydraulic machine can be set with multiple pressurization functions, so that the pressed product will be fuller and more complete. Process requirements ensure product quality even more.
At the same time, the servo hydraulic machine adopts computer and double-proportional hydraulic control technology, which can control the pressure more accurately. The pressure can be arbitrarily adjusted through the system to achieve the suppression requirements of different products, and no pressure jump will occur. This will have better protection for the mold and increase the service life of the mold. This is not possible with conventional hydraulic presses.

Using high-precision sensor detection

High-precision displacement sensor and pressure sensor are used to detect the position and pressure signal of the hydraulic press respectively. Compared with the conventional travel switch or proximity switch detection, it can detect and feedback any action staying position or pressure change of the hydraulic press, with high detection accuracy and faster response speed.
The servo hydraulic press uses a servo drive to control proportional pressure and proportional flow valves to control the hydraulic system, and a grating ruler to monitor the position of the template. Form a closed-loop control, so that the control accuracy is higher, and the repeatability of the template operation can reach ±0.01mm, ensuring more stable product quality.
The pressure sensor is used to detect the pressure, and the proportional pressure valve automatically follows the set pressure to ensure the control accuracy and repeatability of the pressure, effectively guarantee the product quality, and reduce mold damage caused by abnormal pressure fluctuations.

Storage function of pressing process parameters

The HTSe servo series adopts the German Siemens touch screen and PLC control system, which can store 120 sets of mold process parameters. That is, during the production process, the set product processing parameters are stored in the system, and the processing parameters can be directly transferred when the same product is processed next time. This greatly improves the production efficiency and reduces the mold adjustment time during each production.

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