Force Control System at present, there are several models, suitable for different grinding, polishing work. Force control system of flexible control grinding process, according to the position offset of tolerance of workpiece and subtle moment adjustment, the size of the retention in the set range, to ensure the consistency of surface effect. A perfect fusion of robot and can significantly lower the difficulty of debugging, robot control grinding path, force control system to control the grinding force, grinding force can be quantified, the part tolerance or large deformation of sheet metal, stamping, plastic, etc., still can ensure consistent effect, high production realizability.Flexible grinding system is suitable for the grinding and polishing different work scenarios, apply to the 3 c, auto parts, household sanitary products industry, such as automatic polishing, grinding, especially suitable for curved surface, plane and other equipment arc Angle, body can't implementation artifacts environment. 3C Electronics DFC system, Auto Parts DFC system,Household Sanitary Ware DFC systeme, Traffic And Transportation DFC system DARU Technology (Suzhou) Co., Ltd. , https://www.szactivecontactflange.com
　　
(1) The shape of the spool is mainly based on the selected flow characteristics and unbalanced forces and other factors to consider.
　　
(2) Wear resistance When the fluid medium is a suspension containing high concentration of abrasive particles, the valve core, the valve seat joint surface will be severely rubbed each time it is closed. Therefore, the flow of the valve should be smooth, the valve's internal material to be hard.
　　
(3) Corrosion resistance Due to the corrosive medium, try to choose a simple structure of the valve in the case of regulatory function.
　　
(4) Medium temperature, pressure When the medium temperature, high pressure and changes, should use the valve core and valve seat material by temperature, pressure changes in small valves.
　　
(5) to prevent flash and cavitation flash and cavitation only produce liquid medium. In the actual production process, flash and cavitation not only affect the calculation of flow coefficient, but also the formation of vibration and noise, so that the valve life is shorter, so the valve should be selected to prevent flash and cavitation.
　　
Asphalt pump overview:
　　
Asphalt pump by the implementing agencies and valves. The use of compressed air as the power source, for a variety of corrosive liquids, with particles of liquid, high viscosity, volatile, flammable, highly toxic liquids, can be smoked exhausted. Suitable for placement in a variety of special occasions, used to pump the kind of conventional pump can not suction medium. Asphalt pump actuator with pneumatic actuator and electric actuator, respectively, type QBY pneumatic asphalt pump and DBY electric asphalt pump. Asphalt pump body (body) material has four kinds: plastic, aluminum, cast iron, stainless steel, respectively, according to the requirements of liquid or gas medium selection. Asphalt pump internal diaphragm is also based on different liquid media were nitrile rubber, neoprene, Viton, polyvinylidene fluoride, polyhexachlorethylene, so when ordering to specify the type of media.
　　
Asphalt pump specific selection method:
　　
1, the role of asphalt pump option
　　
The role of asphalt pump only in the selection of pneumatic actuator only, its role in the positive and negative through the implementing agencies and the positive and negative valve action combination. There are four types of combination that is positive (air-off type), positive and negative (air-type), anyway (air-type), anti-anti (anti-off type) Open and Qi off two. For the choice of asphalt pump mode of action, mainly from three aspects:
　　
(1) process production safety;
　　
(2) the characteristics of the medium;
　　
(3) Ensure product quality, economic loss is minimal.
　　
Asphalt pump life extension method
　　
1, Asphalt pump body running at high temperature, cold installation piping should be set Hinge seat to prevent the pipe after heating temperature.
　　
2, behind the pump outlet melt filter to be replaced on a regular basis, do not long-term high pressure and pressure limit to run.
　　
3, Regular replacement of bearings can save maintenance costs. When it is found that the amount of wear on the inner surface of the shaft or bearing is close to the thickness of the hardened layer, the shaft can be polished and reused, replacing only the bearing. This prolongs the life of the shaft by 8 to 10 years.
　　
4, in case of power outage or heat medium cycle interrupt more than 3Omin, the asphalt pump should be disassembled after cleaning reassembly, in order to avoid melt curing. Cracking caused by poor lubrication of the bearing so that the pump damage.
　　
5, the coupling must be heat in the pump body heat correction, in order to avoid running additional torque.
　　
6, the pump outlet pressure measuring point to set the interlock to stop the alarm, otherwise, once the discharge pipe blocked, easy to cause damage to the pump.
　　
7, Asphalt pump start, no pressure in the export formation, you can not blindly speed, in order to prevent premature failure of the shaft or bearing.
　　
8, cleaning pipetting, do not pump delivery of cleaning fluid, the inner parts should be removed, pipetting after the end of installation, so as not to pump foreign matter.
　　
9, bitumen pump heat medium jacket temperature can be slightly lower than before and after the jacket heat medium temperature. Melt viscosity and shear rate as a decreasing function, asphalt pump gear extrusion, bearing shear will melt the temperature rise after the pump 3 ~ 5 ℃, reducing the heat medium temperature to prevent melt degradation. Data show that by reducing the bearing zone temperature, can greatly increase the bearing capacity, do not need to replace the large-capacity pump, just by increasing the speed can be used to increase the output capacity of asphalt pump 50%.
　　
10, the speed to be slow, do not make the pressure before and after a sharp rise in order to avoid damage to the bearings or melt blocked lubrication channel.
   Asphalt pump uses compressed air as the power source, for a variety of corrosive liquids, with particles of liquid, high viscosity, volatile, flammable, highly toxic liquids, can be sucked exhausted. Asphalt pump selection in the specific choice, the following aspects can be considered: