36results about How to "Avoid Grinding Burns" patented technology

The invention discloses an impregnant for impregnated grinding wheels and application thereof in preparing the impregnated grinding wheels. The impregnant is prepared from a solid lubricant, surfactants, dispersants, anti-adhesion addictives and water, wherein the solid lubricants are molybdenum disulfide and paraffin; the surfactants are oleic acid and triethanolamine; the dispersants are sodiumchloride and sodium carbonate; and the anti-adhesion addictives are sodium molybdate and tributyl phosphate. The impregnant is used for preparing the impregnated grinding wheels, and the prepared impregnated grinding wheels have the advantages of improving the grinding state and reducing grinding burn.

The invention relates to a self-adaptive control method of spherical numerical-control precision grinding process in the technical field of automatic control, comprising the steps of: collecting a current value of a driving motor in the grinding process and setting the current value as a processing current threshold; detecting a current value of a grinding wheel driving motor by taking once circulatory feeding of a grinding wheel frame as a detection period during the processing; and solving the average value of the currents according to continuous 5-minute current values of the grinding wheel driving motor and carrying out optimization judgment. In the invention, through detecting the current of the grinding wheel driving motor and controlling the grinding feeding depth (feeding amount)in the rotary spherical grinding process of a high-hardness material, the current of the grinding wheel driving motor is kept at a proper value all the time, namely, the feeding depth (feeding amount) of the grinding wheel frame is basically consistent with the removal rate of the workpiece material during the grinding of the grinding wheel, thereby achieving efficient and stable grinding effect.

Provided is a gear grinding method wherein an initial cutting position by a grindstone is appropriately set, resulting in an improvement being able to be made in machining accuracy. For this purpose, the gear grinding method is such that rotation of a workpiece (W) about a workpiece rotation axis (C), cutting by a grindstone (15) in the X-axis direction, and feeding of the grindstone (15) in the Z-axis direction are controlled, resulting in the workpiece (W) being ground by the grindstone (15). In this method, measurement points (P1 - P9) are set in a grid-like pattern on a left tooth surface (WL) and a right tooth surface (WR) of a predetermined tooth (Wa) of the workpiece (W); rotation phases about the workpiece rotation axis (C) at the measurement points (P1 - P9) are detected; tooth thickness deviation amounts (e) between a reference involute tooth surface and the measurement points (P1 - P9) on the left and right tooth surfaces, as well as tooth thickness deviation amounts (e) between the involute tooth surface and corresponding points (Q1 - Q9) on all teeth other than the tooth (Wa), are obtained on the basis of the detected rotation phases; and an initial cutting position (X1) for the grindstone (15) is set on the basis of the largest of the deviation amounts (e) .

The invention discloses a parameter design method of a tooth profile grinding temperature uniform macrostructure forming grinding wheel, which is characterized in that a groove whose width varies according to a certain rule from the bottom to the top is designed on the working surface of the forming grinding wheel. The process of determining the change law of the groove width is as follows: establish an analytical model of the intermittent grinding temperature field of the grooved grinding wheel; establish a correlation model of grinding parameters, groove width and grinding temperature through multiple nonlinear regression analysis; combine the gear forming grinding Based on the geometric relationship of the grinding contact, the relationship model between the groove width of the grinding wheel and the grinding parameters, the geometric size of the gear and the contact position is established. According to the derived relationship model, the groove width at any position of the grinding wheel is calculated to determine the macroscopic structure of the grinding wheel working face. Compared with the existing continuous forming grinding wheel, the grinding wheel of the invention is beneficial to solve the problem that the gear forming grinding temperature is concentrated on the top of the teeth, prevent grinding burns and ensure the grinding quality.

The invention relates to a method for softening the carburized region of gear steel after carburizing. After high-temperature austenitization, oil quenching and stress relief treatment, the Ms point of the carburized layer structure is greatly reduced, and the hardness of the material may be reduced to HRC28. Between ~35, gear shaping, gear hobbing or finishing turning can be performed. After the material is softened by the invention, the grinding process can be replaced, the occurrence of grinding burns can be effectively avoided, and the production efficiency can be improved.