Method for avoiding pointy edges at head and tail of thread in thread processing

A thread, head and tail technology, applied in the field of CNC machining, can solve the problems of difficult control of the machining process, affect the assembly accuracy of workpieces, and easily damage the flanks of thread teeth, etc., and achieve the effects of shortening the processing process, saving process costs, and good social benefits
CN102489790AInactive Publication Date: 2012-06-13SHENYANG LIMING AERO PARTS MFG
5 Cites 13 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENYANG LIMING AERO PARTS MFG
Publication Date
2012-06-13
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

A method for avoiding pointy edges at the head and the tail of a thread in thread processing belongs to the technical filed of numeral control processing, which can improve surface quality and processing efficiency of a workpiece and effectively avoid the pointy edges at the head and the tail of the thread in the thread processing. The method comprises the following steps of 1 turning a spiral cylinder slot, increasing strength of a starting thread profile, cutting and removing one-second turn to three-fourth turn of the spiral cylinder slot from the internal circular face or the external circular face of the workpiece before the thread is processed on the workpiece, and removing original pointy edges in advance; and 2 processing the thread and feeding a cutter along the spiral cylinder slot. The coordinate of the starting point of the thread is consistent to that of a cutter track line of cut and removed spiral cylinder slot processed at last in the step 1.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of numerical control machining, and in particular relates to a method for avoiding sharp edges at the beginning and end of the thread when machining the thread. Background technique

[0002] The sharp edges at the beginning and end of the thread (such as figure 1 (shown) means that when the initial thread is turned, the width between the thread profile and the end surface of the workpiece forms a gradual sharp edge due to the helix of the thread itself. When the tool just cuts into the workpiece, the two cutting edges of the tool have a cutting force F perpendicular to the direction of the cutting edge on the workpiece (such as figure 2 shown); the sharp edge of the thread is thinner at the starting point of the thread, and it is easily deformed when stressed, and tilts outward. At the same time, the amount of deformation of the sharp edge varies with the sharp edge of the thread; from a macro perspective...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More