Internal grinding machine is used to grind inner holes; A cylindrical grinder is used to grind an outer circle, and there is also a type called a centerless cylindrical grinder. For example, the outer ring of a bearing is generally made by external grinding without center grinding, while the inner hole is made by internal grinding.

Before repairing the internal and external cylindrical grinder, it is necessary to first understand the usage of the machine tool and conduct necessary inspections. The performance and accuracy of the machine tool should be checked according to relevant accuracy standards or machine tool qualification certificates. The repair plan and acceptance requirements of the machine tool should be determined based on the loss of accuracy and existing problems.

The abrasive of the internal grinder is slow and the accuracy is poor: a grinding wheel with coarse sand particles should be used to grind the inner hole. Due to the coarse sand particles, the grinding wheel is not easily blocked by debris during grinding. So the efficiency during grinding will be higher than that of fine grinding wheels.

The main precision and performance tests for repairing cylindrical grinders are as follows:

(1) Headframe Master http://www.btjxjt.com The parallelism error and equal height error of the upper busbars of the axis line and tailstock sleeve axis line.

(2) Circular runout error during the rotation of the headstock spindle (measured with a test bar).

(3) Circular runout error during the rotation of the grinding wheel spindle.

(4) Hydraulic performance testing: When the worktable crawls at low speeds; Worktable reversing, stopping and impact situation; The buffering performance of the grinding head during rapid advance and retreat; Oil leakage at both ends of the hydraulic cylinder; Oil leakage in the control box.

(5) Inspection of machine tool working accuracy and surface roughness.