Numerically controlled lathe for two-head processing of torsion rod and method for processing torsion rod through numerically controlled lathe

Abstract

The invention relates to the field of design and operation of machine tools, in particular to a numerically controlled lathe for two-head processing of a torsion rod and a method for processing the torsion rod through the numerically controlled lathe. The numerically controlled lathe comprises a lathe body, a linear guide rail, a spindle box mounted on the linear guide rail, and a hydraulic knife rest allowing a cutter to be mounted, wherein the spindle box comprises a left spindle box and a right spindle box; the hydraulic knife rest comprises a left hydraulic knife rest and a right hydraulic knife rest; a front-mounted type left pneumatic clamping disc is mounted on the left spindle box, a precision spindle unit I and a precision gear transmission system for driving the left pneumatic clamping disc to rotate are arranged in the left spindle box, and the precision gear transmission system is driven by a servo motor I; a front-mounted right pneumatic clamping disc is mounted on the right spindle box, and a precision spindle unit II is arranged in the right spindle box; each of the left pneumatic clamping disc and the right pneumatic clamping disc is provided with a pneumatic booster pump for improving the clamping force of a clamping jaw. According to the method for processing the torsion rod through the numerically controlled lathe, working procedures are optimized, loading and unloading are rapid, and the processing time is shortened.

Description

technical field [0001] The invention relates to the field of machine tool design and its operation, in particular to a numerically controlled lathe used for double-end processing of torsion bars and a method for processing torsion bars. Background technique [0002] The torsion bar is a slender rod, and it is an important part in the buffer system of vehicles such as automobiles and armored vehicles. It has a large axial span, high processing accuracy requirements, and many models. [0003] The two ends of the torsion bar are finished after induction hardening, and its processing characteristics: [0004] (1) Its own rigidity is poor, and it is easy to cause tool vibration during processing; [0005] (2) Generally, the roughness of the clamped position of the torsion bar workpiece is about 1.0 μm, but the roundness is poorer by about 0.1 mm. The better roughness requires that the clamping force during clamping is not less than 3000kgf, and the roundness is relatively poor. ...

AI Technical Summary

Problems solved by technology

[0004] (1) Its own rigidity is poor, and it is easy to cause tool vibration during processing;

[0005] (2) Generally, the roughness of the clamped position of the torsion bar workpiece is about 1.0 μm, but the roundness is poorer by about 0.1 mm. The better roughness requires that the clamping force during clamping is not less than 3000kgf, and the roundness is relatively poor. The centering accuracy is required to be sufficient, and the workpiece cannot be caused to vibrate due to this factor when it is rotating;

[0006] (3) There are relatively many models, and parameters such as length and diameter change frequently;

But this type of device has the following disadvantages: 1) The chucks of the two stations rotate at the same time and need to be driven separately, which makes the effective size of the spindle box in the axial direction of the workpiece larger, and cannot process slender workpieces with a length of less than 1.5 meters. Two heads of the shaft; 2) The claw stroke of the conventional hydraulic chuck used to clamp the slender shaft is 7mm. Although it can ensure sufficient clamping force, it cannot clamp such as the torsion bar, which is thick at both ends and thin in the middle. Slender rod

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