Special clamp for milling head of numerically controlled machine tool

Abstract

The invention discloses a special clamp for a milling head of a numerically controlled machine tool. The clamp comprises the milling head. A cylindrical hole is excavated in the milling head along the axial direction, a hydraulic oil cylinder is mounted in the bottom of the cylindrical hole, a cooling jacket sleeves the peripheral wall of the hydraulic oil cylinder, a round baffle plate is mounted on the top of the hydraulic oil cylinder, piston rods are mounted on two ends of the hydraulic oil cylinder, square holes and oil holes are formed between the upper outer wall of the milling head and the side wall of the cylindrical hole, the square holes communicate with the oil holes, rectangular blocks are inserted into the square holes, one ends of the rectangular blocks are fixedly connected to fixing clips, an oil body in the hydraulic oil cylinder is kept in a cooled state all the way by means of the cooling jacket, the hydraulic oil cylinder is not affected by dust and workpiece chippings by means of the round baffle plate, the hydraulic oil cylinder keeps a good working state all the way, the hydraulic oil cylinder pushes the pistons at two ends to squeeze hydraulic oil to push the clamp to tightly clamp a milling cutter by means of a liquid pressure of the hydraulic oil, and the clamping vigor of the milling cutter clamp is ensured by joint squeezing of the two piston rods, and the machining quality is better.

Description

technical field [0001] The invention relates to the technical field of CNC machine tool accessories, in particular to a special fixture for a milling head of a CNC machine tool. Background technique [0002] With the continuous development of science and technology, higher and higher requirements are put forward for the quality and productivity of mechanical products. In addition, the global competition in the manufacturing industry is becoming increasingly fierce. Statistics show that in the machinery manufacturing industry, single-piece and small-batch production accounts for about 80% of the total machining. CNC machine tools are especially suitable for the processing of products with small processing batches, complex shapes of processed parts, and high processing accuracy requirements. As one of the important accessories of CNC machine tools, the milling head undertakes the major tasks of various processing methods of some workpieces such as grinding, drilling and threa...

AI Technical Summary

Problems solved by technology

[0004] (1) Most of the milling head fixtures on the market currently use hydraulic cylinder fixtures to clamp the milling cutter, but because of the long working hours and working environment of the hydraulic cylinder, the oil in the hydraulic cylinder will heat up and affect the hydraulic pressure of the hydraulic cylinder , so that the clamping force of the fixture will decrease, which will cause the milling cutter to be unstable or shifted, thereby reducing the processing quality, and the dust and processed iron filings will adhere to the gap between the milling cutter and the fixture during processing. to the surface of the hydraulic cylinder, causing obstruction and damage to the hydraulic cylinder, and reducing the clamping force of the fixture;

[0005] (2) Most of the fixtures now use the piston rod of the single head of the hydraulic cylinder to give hydraulic oil pressure to force the fixture to clamp the milling cutter. Such a piston rod has a single pressure and insufficient clamping force, resulting in inaccurate processing and poor quality of the workpiece The consequences, and the general fixture is a fixture suitable for a milling cutter, lack of versatility, and the inner shape of the chuck of most fixtures is a smooth structure, such a structure, when the milling cutter is under great stress, the milling cutter Easy to slide, resulting in adverse consequences of inaccurate processing

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