Method for machining spiral groove

Abstract

The invention discloses a method for machining a spiral groove. The method includes the following steps that (1) a plurality of round holes arranged at intervals are formed in the surface of a workpiece by means of a drill according to the spiral line of the spiral groove; (2) the sector allowance between every two adjacent round holes of the workpiece is removed by means of the drill, so that a rough spiral groove is formed; (3) finish machining is conducted on the rough spiral groove by means of a milling cutter, so that the spiral groove is obtained. After most allowance is removed by means of the drill, the milling cutter is used for finish machining. The speed of the drill for machining the round holes to remove the allowance is higher than that of the milling cutter for grinding the allowance, and thus the machining speed can be increased. Besides, most allowance of the spiral groove is removed in the machining process of the rough spiral groove, and thus machining can be conducted through the milling cuter at a high speed and the machining speed of the spiral groove is further increased. The portion ground by the milling cutter is small, and therefore the abrasion loss is small, the machined spiral groove is protected against a slotting phenomenon, and the requirement for the roughness can be met. Polishing and repairing are not needed, so that the number of working procedures is reduced, and the machining speed is further increased.

Description

technical field

[0001] The invention relates to the field of groove body processing, in particular to a spiral groove processing method. Background technique

[0002] The existing spiral groove processing technology is to use the rotating shaft of the vertical machining center to rotate, and use the milling cutter to feed layered processing along the X axis. The disadvantage of this processing method is that the feed of the rotating shaft cannot be too large during the rotation process, which reduces the processing efficiency; and the milling cutter is easy to wear, and the roughness of the spiral groove processed after the milling cutter is not sharp causes poor groove phenomenon, which cannot To meet the requirement of roughness Ra0.8, it is necessary to arrange a fitter process for polishing, which further leads to a decrease in processing efficiency. Contents of the invention

[0003] The invention provides a spiral groove processing method to solve the technical prob...

Examples

Embodiment 1

[0052]The VF-3 machine tool processes spiral grooves on the surface of the workpiece. The outer circle radius R of the workpiece is φ17mm, the pitch of the spiral groove is 12mm, the groove depth is 6mm, and the groove width is 3mm. During the processing, after the workpiece is opened with a round hole with a diameter of 3 mm, another round hole is opened after the workpiece is moved 1.33 mm in the axial direction and rotated at an angle of 40° to form multiple round holes set at intervals, and then the drill bit is used to remove the fan-shaped excess. amount to form a helical thick groove. Use a φ3mmxx milling cutter to finish the helical rough groove to obtain the helical groove. In 8 hours, a total of 21 workpieces were processed.

Embodiment 2

[0054] The difference between embodiment 2 and embodiment 1 is that another circular hole is opened after the workpiece moves 0.67 mm in the axial direction and rotates 20 degrees. In 8 hours, a total of 16 workpieces were machined. Compared with the workpiece processed in Example 1, the surface roughness is slightly lower.

Embodiment 3

[0056] The difference between embodiment 3 and embodiment 1 is that another circular hole is opened after the workpiece is moved 2 mm in the axial direction and rotated by 60 degrees. In 8 hours, a total of 14 workpieces were machined. Compared with the workpiece processed in Example 1, the surface roughness is slightly lower.

technical field

[0001] The invention relates to the field of groove body processing, in particular to a spiral groove processing method. Background technique

[0002] The existing spiral groove processing technology is to use the rotating shaft of the vertical machining center to rotate, and use the milling cutter to feed layered processing along the X axis. The disadvantage of this processing method is that the feed of the rotating shaft cannot be too large during the rotation process, which reduces the processing efficiency; and the milling cutter is easy to wear, and the roughness of the spiral groove processed after the milling cutter is not sharp causes poor groove phenomenon, which cannot To meet the requirement of roughness Ra0.8, it is necessary to arrange a fitter process for polishing, which further leads to a decrease in processing efficiency. Contents of the invention

[0003] The invention provides a spiral groove processing method to solve the technical prob...

Examples

Embodiment 1

[0052]The VF-3 machine tool processes spiral grooves on the surface of the workpiece. The outer circle radius R of the workpiece is φ17mm, the pitch of the spiral groove is 12mm, the groove depth is 6mm, and the groove width is 3mm. During the processing, after the workpiece is opened with a round hole with a diameter of 3 mm, another round hole is opened after the workpiece is moved 1.33 mm in the axial direction and rotated at an angle of 40° to form multiple round holes set at intervals, and then the drill bit is used to remove the fan-shaped excess. amount to form a helical thick groove. Use a φ3mmxx milling cutter to finish the helical rough groove to obtain the helical groove. In 8 hours, a total of 21 workpieces were processed.

Embodiment 2

[0054] The difference between embodiment 2 and embodiment 1 is that another circular hole is opened after the workpiece moves 0.67 mm in the axial direction and rotates 20 degrees. In 8 hours, a total of 16 workpieces were machined. Compared with the workpiece processed in Example 1, the surface roughness is slightly lower.

Embodiment 3

[0056] The difference between embodiment 3 and embodiment 1 is that another circular hole is opened after the workpiece is moved 2 mm in the axial direction and rotated by 60 degrees. In 8 hours, a total of 14 workpieces were machined. Compared with the workpiece processed in Example 1, the surface roughness is slightly lower.

Images