(l) mechanical deburring tool, removal of hydraulic parts at the tip of the thorn is called mechanical deburring. Figure 9-4 (a) is a schematic diagram of the burr caused by removing the rough burr with the metal soft brush mounted on the milling JJ disk. The burr is removed by mechanical and de-burr brush, such as the spool, the inner hole of the gear of the gear pump
, the hole L of the valve body, etc. Brush is made of nylon or plant fiber brush, and nylon on the top of the paste particles. Or the abrasive is fused in the wire, also useful high strength nylon sticky abrasive ball to brush. Wu machinery vibration deburring device, mounted eccentrically in the hopper, vibration hopper), make the hopper at the bottom of the motor vibration, artifacts and small pieces in the hopper vibration impact abrasive and remove the burr tops of parts by side. Gear pump
this method of domestic hydraulic parts commonly used thermal deburring, electrolysis deburring, magnetic grinding deburring, high pressure water jet deburring, grinding particle flow deburring and other methods. (2) diamond hinge) method for repairing valve hole 1 before the hole for fine processing and repair, there are honing, grinding and diamond reamer reaming holes. Honing and grinding is a familiar process, only the diamond hinge for repairing the valve hole is introduced here. The diamond reamer processes the valve hole with high machining accuracy (roundness and cylindricity can be within o.olmm), providing good conditions for achieving complete interchangeability assembly. Size dispersion, easy to production management, high productivity and economic, each valve processing time only about 20s, hole surface quality is good, no residual abrasive. It is the ideal work of the final finishing of the valve hole, is a new process of domestic and foreign craft, and is also very suitable for the use in the maintenance. See figure 9-5 for the diamond reamer. The function of the front guide sleeve is to guide the valve hole to be machined or to be repaired, so that the reamer sleeve can enter the machined hole smoothly; Back guide sleeve is used for back guide to ensure the straightness of workpiece machined L; The front and rear guide sleeve is about 2/3 of the length of the hole to be processed, and the outer diameter of the front guide sleeve is more than that of the key part of the rigid stone hinge J to be processed. The sharp angles of the diamond particles form the numerous cutting edges of the reamer to remove the valve hole allowance. The screw groove is opened on the 9 sets to facilitate different machining sizes through the 1:50 taper regulating valve hole. The electroplated diamond on the reamer sleeve is mainly selected according to the machining allowance and roughness. Due to the good grinding performance of artificial diamond, the grinding wheel consumption is small. Natural diamond is suitable for large load and is more suitable for large cutting quantity than artificial diamond. Therefore, according to the maintenance characteristics to reduce the surface roughness, it is appropriate to use fine particle size artificial diamond hinge JJ repair valve hole. Generally, it can be processed by clamping diamond hinge (9) on ordinary machine tools. Figure 9-6 is hydraulic parts production E: simple special plane adopted by the factory. Generally, the workpiece reciprocates 10 to 20s at a time, the spindle head speed is too high to produce vibration, too slow will reduce the aperture and precision. During cutting, kerosene or weak alkaline emulsion or kerosene 80% plus 20% 20# machine oil as coolant.