Pneumatic support device for steady operation of overlong boring cutter bar

Abstract

The invention provides a pneumatic support device for steady operation of an overlong boring cutter bar. In the device, two support plates of a cylinder support (3) are fixed on a base plate, and thedistance between the two support plates meet the mounting requirements of a cylinder (7); a connecting line between cylinder mounting holes on the two support plates and the central line of the base plate form an included angle alpha; and the degree of the included angle alpha is consistent with the direction of resultant cutting force. Two ends of the cylinder (7) are fixed on the cylinder support (3); and the cylinder support is fixed on an end face of a boring cutter bar (1); the boring cutter bar (1) is provided with an air tube mounting groove, one end of an air tube (8) is communicated with the cylinder, and the other end thereof is communicated with a pressure regulating / stabilizing unit (4) and an air tube switch (5). A piston rod of the cylinder extends to prop on the inner wall of a bottom hole and support the boring cutter bar when compressed air enters the cylinder. The pneumatic support device solves the problems of cutter relieving and vibration due to insufficient cutterbar rigidity in precision boring of hole parts with large length-diameter ratio, is applicable to boring of holes with large length-diameter ratio, and has the advantageous of simple structure, convenient operation, reliable operation, low cost and no pollution.

Description

1. Technical field

[0001] The invention relates to the field of mechanical processing, in particular to a pneumatic support device for the stable operation of an ultra-long boring bar. 2. Background technology

[0002] The precision boring of the hole boring of parts with large length-to-diameter ratio has been a difficult problem in machining for a long time. Due to the limitation of the size of the large aspect ratio hole, the tool holder for boring can only be made into a slender structure, so the rigidity of the tool holder is poor. Due to the cutting force during processing, the cutter holder is deformed and the chatter causes a large drop in accuracy. The tool breaks and cannot meet the processing requirements, and sometimes it cannot even be processed. 3. Contents of the invention

[0003] In order to overcome the shortcomings existing in the prior art due to the poor rigidity of the long tool bar, deformation and chatter easily occur during processing, resulting i...

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