How to solve problems quickly through three-dimensional CAD software

Because the gear is a parametric part, its shape can be determined by modulus, number of teeth, pressure angle, tooth top high coefficient, top clearance coefficient and tooth width. How to adapt and correct the parametric parameters of gears, change the shape of gears, so as to produce the required specifications to meet the requirements of the enterprise? Become a common concern for CAD engineers of manufacturing design. This article will introduce in detail how to solve the above problems quickly through three-dimensional CAD software.

This paper takes the easy to use 3D as an example, provides the reader with the equation formula of the gear equation, and also can customize the parameter template of the gear equations, which gives the CAD designer a higher efficiency in designing the gears. Since the 3D has its own "Edge learning" learning system, so it is very suitable for the three-dimensional CAD beginners. Let's take a look at how engineers use the middle-to three-dimensional CAD modeling of involute gears:

1. First, we define gears according to the following example parameters

Modulus: 4

Number of teeth: 24

Pressure angle 20 degrees

Bore diameter 45

Keyway 12*3.2

2. Gear Calculation formula

3, according to the gear calculation formula to establish cylinder

Tooth Top circle diameter =4* (24+2) =104

The diameter of the =4*24=96 circle

Tooth root Circle diameter =4* (24-2.5) =86

Base Circle diameter =cos (*d=90.2)

4, immediately following the operation, the next need to follow according to the gear parameter definition cylinder, the following figure

5, also need to follow according to the gear parameter definition inside hole, the following figure:

6, then complete the definition of keyway, the following figure

7, into the sketch, draw the degree of roundness, tooth root circle, base circle, the following figure:

8, here in the 3D provides the equation formula for involute gears can also be customized formulas, to designers in the design of gears to bring more efficient according to the involute equation of cylindrical gears, fill in the equation parameters, the following figure:

9, the establishment of cylindrical gear involute, according to the angle and number of teeth, modulus fixed two teeth spacing angle 3.75

10, Mirror Involute, the following figure:

11, connect the involute and tooth root round line, the following figure:

12, stretch the cutting body, the following figure:

13. Rotate the cutting body number 23, trim the gear, the following figure:

The parametric values of gears are correctly modified by the 3D demo. Change the shape of the gear and so on the above steps, so as to produce the required specifications to meet the requirements of the enterprise for three-dimensional CAD modeling data needs, is conducive to more image of the design of the workpiece intuitive observation, greatly reducing the actual production and processing of waste.