Machining technology of nylon gear

Abstract

The invention relates to a machining technology of a nylon gear. The nylon gear comprises a metal shaft and a nylon ring arranged on the outer portion of the metal shaft in a sleeving manner. The machining technology comprises the specific steps of A manufacturing the nylon ring, B conducting press fitting, C locating a dedicated hobbing device, D conducting hobbing on the nylon ring and E removing burrs. The machining technology of the nylon gear has the following advantages that a traditional process of conducting hobbing on the nylon ring firstly and then conducting press fitting is changed, and it is avoided that pressure stress and cutting force generated during hobbing cause deformation in the nylon ring and then influence follow-up press fitting; by the adoption of the process of conducting press fitting firstly and then conduct hobbing, press fitting is facilitated, and the internal strength of the nylon gear is guaranteed at the same time; during press fitting, a heating pressfitting manner is changed, so that it is avoided that thermal stress is generated in the nylon ring; and by forming a stress release groove, when the metal shaft vertically penetrates through the nylon ring, the stress in the nylon ring is effectively released, and it is avoided that stress concentration influences the internal structural strength of the nylon gear.

Description

Technical field: [0001] The invention relates to the field of nylon gears, in particular to a processing technique for nylon gears. Background technique: [0002] Nylon gears are one of the most widely used parts in mechanical transmission. Because nylon has good comprehensive performance, nylon gears are often used in the transmission of light machinery, instruments and other equipment. Nylon gears are formed by pressing nylon rings and metal shafts. structure. At present, the processing technology of nylon gears is as follows: first hobbing the outer surface of the nylon ring and the metal shaft, then pressing the nylon ring and the metal shaft, and finally deburring, heating the metal shaft during pressing, and When the nylon ring is pressed, the nylon ring is softened, so as to achieve the effect of fast pressing. This processing technology has the following defects: [0003] 1. Pressing after heating is convenient for pressing, but it is easy to cause thermal deformat...

AI Technical Summary

Problems solved by technology

[0003] 1. Pressing after heating is convenient for pressing, but it is easy to cause thermal deformation inside the nylon ring, which affects the structural strength of the pressed nylon gear. When the nylon gear is in use, once it encounters a large transmission When powered, the nylon ring will start to crack at the internal thermal deformation, which will affect the subsequent service life of the nylon gear;

[0004] 2. When hobbing, the hobbing protrusions generate compressive stress on the outer end surface of the nylon ring. Since the elastic deformation of the nylon material is larger than that of the metal, under the action of the cutting force and compressive stress of the hobbing protrusions, the nylon ring The lower edge area of ​​the tooth width will produce a large elastic deformation. At the same time, the hobbing protrusion rotates in the circumferential direction during gear hobbing to cut the nylon ring from top to bottom. The burrs are concentrated in the lower edge area of ​​​​the tooth width. The work is time-consuming and labor-intensive, and due to the characteristics of the nylon ring under the action of the cutting force, the top of the nylon ring is prone to vibration when cutting, resulting in a low smoothness of the tooth surface; The effect of compressive stress will affect the diameter of the inner hole of the nylon ring, which will cause certain difficulties for subsequent pressing, and forced pressing will destroy the structural strength of the nylon ring

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