Supply pressure oil for transmission system of hydraulic cylinder factory
Time: 2018-04-15 Browse:
Because of its different thickness, the same abrasive grinding wheel.The surface roughness and processing efficiency of the workpiece after processing are not the same. The coarser abrasive grains are used for rough grinding, and the finer abrasive grains are suitable for fine grinding. The coarser the abrasive, the smaller the particle size.
The second is the resin bond.The choice of bonding agent is different, and the bonding agent plays the role of bonding abrasive.Commonly used ceramic bond.Affect the corrosion resistance, strength, heat resistance and toughness of the grinding wheel.
The less likely it is to fall off the grinding wheel, the stronger the bond of abrasive grains will be.It is called the hardness of the grinding wheel, that is, the hardness of the grinding wheel refers to the degree of difficulty for the abrasive particles on the surface of the grinding wheel to fall off under the action of external force.Easy to fall off is called soft, and vice versa is called hard.The hardness of the grinding wheel and the hardness of the abrasive are two different concepts.The surface of the workpiece to be ground is soft, and the cutting edges (edges) of the abrasive grains are not easy to wear, so that the abrasive grains can be used for a longer time, that is to say, a firmer bonded grinding wheel (higher hardness grinding wheel) can be selected. , Low-hardness grinding wheels are suitable for grinding high-hardness workpieces.
In order to ensure safety, the grinding wheel works under high-speed conditions.Inspection should be carried out before the device, and there should be no defects such as cracks; in order to make the grinding wheel work smoothly, a dynamic balance test should be carried out before use.
The surface voids will be blocked by the grinding debris, and the grinding wheel will work for a certain period of time.The sharp angle of the abrasive will be blunt, and the original geometric shape will be distorted.Therefore, trimming is necessary to restore cutting ability and correct geometry.The grinding wheel needs to be trimmed with a diamond pen.
Grinding is a method in which a grinding wheel is used as a cutting tool on a grinding machine to cut a workpiece.The characteristics of this method are
Therefore, grinding can process materials with very high hardness, 1 because the abrasive grains of the grinding wheel themselves have high hardness and heat resistance.Such as hardened steel, cemented carbide, etc.
一般ap=0.0010.005mm磨削速度很高，2砂轮和磨床特性决定了磨削工艺系统能作均匀的微量切削。一般可达v=3050m/磨床刚度好；采用液压油缸厂传动，因此磨削能经济地获得高的加工精度（IT6IT5和小的外表粗糙度（Ra=0.80.2μm磨削是零件精加工的主要方法之一。
The temperature in the grinding zone is very high.This will cause stress and deformation of the workpiece, 3 due to severe friction.It may even cause burns on the surface of the workpiece.Therefore, a large amount of coolant must be injected during grinding to reduce the grinding temperature.Coolant can also play a role in chip removal and lubrication.
Make the actual depth of cut less than the nominal depth of cut.Therefore, when the grinding is about to be completed, the radial force during grinding is very large.This will cause the elastic retreat of the machine tool-grinding wheel-workpiece system.It should be polished without cutting in order to eliminate errors.
The grinding force also increases, causing the abrasive grains to break or fall off. After 5 abrasive grains are blunt.The sharp edge is re-exposed. This feature is called "self-sharpening". The self-sharpening allows the grinding to be carried out normally within a certain period of time, but after a certain working time, manual trimming should be carried out to avoid vibration caused by increased grinding force , Noise and damage to the surface quality of the workpiece.
The structure and grinding movement of surface grinder
There are mainly surface grinders, cylindrical grinders, internal grinders, universal cylindrical grinders (which can also grind inner holes), gear grinders, thread grinders, and there are many types of grinders.Guideway grinders, centerless grinders (grinding external circles) and tool grinders (grinding knives), etc.Here is an introduction to the surface grinder and its movement.
其中：M--磨床类机床；71--卧轴矩台式平面磨床；20--工作台面宽度为200mm;A --第一次重大改进。1.平面磨床的结构（以M7120A 为例。
The grinding wheel holder can move manually or hydraulically along the dovetail guide rail of the sliding seat. 1 Grinding wheel frame-install the grinding wheel and drive the grinding wheel to rotate at high speed.
2 Sliding seat---install the grinding wheel stand and drive the grinding wheel stand to move up and down along the column guide rail.
3 Column-supporting sliding seat and grinding wheel stand.
4 Workbench-the workpiece is installed and driven by the hydraulic cylinder factory system for reciprocating linear motion.
5 Bed-supporting workbench, other parts of the device.
6 Cooling fluid system-to provide coolant (saponified oil) to the grinding area
7 Hydraulic cylinder factory transmission system-its components are:
Supply pressure oil for the transmission system of the hydraulic cylinder factory; a. Power element-oil pump.
Drive the workbench and other parts to move; b. Executive components-hydraulic cylinder factory.
Control pressure, speed, direction, etc.; c. Control elements-various valves.
d. Auxiliary components-such as fuel tanks, pressure gauges, etc.
With overload protection, hydraulic cylinder factory transmission has smooth transmission compared with mechanical transmission.The advantages such as stepless speed regulation can be realized in a larger range.
2. Surface grinding movement
1 The main movement-the high-speed rotating movement of the grinding wheel.
2 feed motion
a. Longitudinal feed-the work table drives the reciprocating linear movement of the workpiece;
b. Vertical feed-the movement of the grinding wheel to the depth of the workpiece;
