Numerical control internal grinding machine clamping and positioning device used for duplicate gear and input shaft

Abstract

The invention discloses a numerical control internal grinding machine clamping and positioning device used for a duplicate gear and an input shaft. An numerical control internal grinding machine comprises a machine head box, and a spindle is installed on the machine head box; two parallel and spaced round thin film steel plates are installed at one end of the spindle, circle centers of the two steel plates are both located on the axis of the spindle, a plurality of first claws are installed on the outward side face of the inner thin film steel plate, each first claw is provided with a clamping face, and the clamping faces of the first claws are evenly distributed on a first circle perpendicular to the axis of the spindle; holes corresponding to the first claws in number are formed in the outer thin film steel plate, the first claws extend out of the holes freely, and the clamping faces of the first claws are located at the outer side of the outer thin film steel plate; a plurality of second claws are installed on the outer side surface of the outer thin film steel plate, each second claw is provided with a clamping face, the clamping faces of the second claws are evenly distributed on a second circle perpendicular to the axis of the spindle, the circle centers of the first circle and the second circle are both located on the axis of the spindle, and an interval is reserved between the second circle and the first circle.

Description

technical field [0001] The invention belongs to the technical field of gear processing and setting for numerically controlled internal grinding, and in particular relates to a positioning device for machining inner holes of a double gear and an input shaft. Background technique [0002] Due to the advantages of machining accuracy and efficiency of CNC internal grinding machines, CNC internal grinding machine tools have been widely used in production. However, in the existing field of internal grinding of gears, there is no specific clamping fixture for duplex gears and shaft parts so that it can automatically ensure the radial runout of the duplex gear ring gear or the shaft parts outside Circular radial runout, the most commonly used method at present is to use manual calibration after clamping. This positioning method has the following defects: [0003] 1. Low efficiency and high labor intensity: because the dial indicator and the watch base are placed after clamping, th...

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Problems solved by technology

[0003] 1. Low efficiency and high labor intensity: because the dial indicator and the watch base are placed after clamping, the head of the dial indicator touches the inner or outer circle of the workpiece under a certain pressure, and then the chuck is turned by hand , according to the value displayed by the dial gauge pointer to determine whether the workpiece is clamped correctly, if the workpiece is not installed in the proper position, it is necessary to re-clamp the workpiece and repeat the table verification

This results in long working hours for a single piece, low efficiency, large human influence factors, and high labor intensity, which greatly consumes the physical strength of the operator.

[0004] 2. The cost of measuring and checking tools is high: with this method, since there is a large amount of cutting fluid in the internal grinding table and fixtures, it is inevitable that the dial indicator will always be in a humid environment, and the cutting fluid is easily damaged. Entering the inside of the dial indicator will cause the dial indicator to be damaged quickly, and also have an adverse effect on maintaining the accuracy of the dial indicator, thereby shortening the service life of the dial indicator and reducing the measurement accuracy, which leads to high cost of the measuring tool no less

[0005] 3. Big potential safety hazard: During the entire operation project, the grinding wheel is always in a state of high-speed rotation, and the operator must be extremely cautious, so that it is in a state of high tension. It is difficult to withstand such psychological pressure during long-term operation, which will affect the psychological pressure of workers. and other aspects have adverse effects; a little carelessness can easily cause personal injury, and there are great potential safety hazards

[0006] In summary, due to the above-mentioned problems in the existing technology, and no relevant technology has been found that can completely overcome the above-mentioned defects

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