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A Helix Angle Measuring Method for Spiral Bevel Gears

A technology of a spiral bevel gear and a measuring method, applied in the field of gear processing, can solve the problems of complicated operation process of the measuring method, and achieve the effects of simplifying measuring steps, improving transmission stability and force uniformity, and simple measuring tools

Inactive Publication Date: 2018-04-27
FUJIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The measurement method proposed by Zhang Hengchang has a complicated operation process, using tools such as indexing circles, coordinate boring machines, and lever tables. At the same time, it is necessary to know the helix angles of the large end and small end of the gear teeth in advance to measure the midpoint helix angle.

Method used

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  • A Helix Angle Measuring Method for Spiral Bevel Gears
  • A Helix Angle Measuring Method for Spiral Bevel Gears
  • A Helix Angle Measuring Method for Spiral Bevel Gears

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Embodiment Construction

[0038] see figure 1 As shown, a method for measuring the helix angle of a spiral bevel gear of the present invention, the method specifically includes the following steps:

[0039] Step 1. Use the height ruler to determine the intersection point between the small end and large end edge of any tooth and a node circle. The two intersection points are marked as A and B respectively, the vertex of the pitch cone circle is O, and the center of the cutterhead is O'.

[0040] Step 2, measure the straight-line distance between the two intersection points A and B with a vernier caliper;

[0041] Step 3. Obtain parameters from the design parameters of the spiral bevel gear: outer cone distance L A , tooth width b, the value of the nominal radius r of the cutter head; and from the outer taper distance L A and tooth width b to obtain the inner taper distance L B , midpoint cone distance L M ;

[0042] Step 4. According to the relationship between angles and sides, obtain the values ​...

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Abstract

The invention provides a helical angle measurement method of a helical tapered gear. A linear distance of helical lines AB is measured and a helical angle can be calculated according to a corresponding relation between the gear and a tool parameter. The helical angle measurement method utilizes simple measurement tools including a height gauge, a vernier caliper and the like, and measurement steps are simplified; a parameter relation between the helical tapered gear and a tool is sufficiently utilized and the helical angle with the higher accuracy is calculated; the helical angle at any position can be measured.

Description

technical field [0001] The invention relates to the technical field of gear processing, in particular to a method for measuring the helix angle of a large spiral bevel gear. Background technique [0002] The helix angle is an important parameter of the spiral bevel gear, which will affect the tooth surface contact state, transmission stability, and force uniformity of the spiral bevel gear pair during work. During the gear processing process, the helix angle must be measured. When required, it is necessary to repair teeth in time. [0003] At present, the commonly used method for measuring the helix angle is the roll printing method. This method is to coat the tooth top surface of the gear under test with dye, and then let the gear roll on the paper. The dye will print the shape of the tooth top on the paper. After the paper is unfolded The effect of is equivalent to the expansion diagram of the addendum circle of the spiral bevel gear. The helix at the pitch cone is appro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B5/24
Inventor 王火生王乾廷陈鼎宁叶晓云黎文峰
Owner FUJIAN UNIV OF TECH
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