The matching of machining quality and machining efficiency is an issue to be seriously considered in finishing machining. After the […]
In order to further verify the correctness and effectiveness of the profile design method of the rake face of the
Large gears generally refer to gears with gear modulus > 16 mm, which are widely used in heavy machinery such
After the assembly of hob and helical gear, the following settings must be completed before the hobbing motion simulation of
The research on the machining method of face gear is an important part of the research on face gear transmission
The main problems in the production line are as follows: Based on the actual situation of automobile gear production line,
The hob cuts at a certain position, and the cutting teeth bear different working loads, so the wear amount of
The selection of gear hobbing cutting speed should consider the tool material and appropriate coating, the modulus of the processed
The gear hobbing hob with modulus of 2, number of grooves of 12 and number of heads of 2 is
The rake angle of the gear hobbing hob is generally 0 °, and its rake face should pass through the
In the meshing process of gear hobbing, the gear hobbing hob is equivalent to the worm, so its stress condition
Before hobbing helical gear, first, prepare the combined fixture and clamp it correctly according to the relative position of each
The research on gear hobbing in China is relatively late, and no one has made a comprehensive and systematic analysis
In order to meet the requirements of hobbing helical gear on the gear hobbing machine, the tooling fixture is designed
Study the tooth surface forming principle of face hobbing Cycloid Bevel gear, and form a complete set of theories and
① A calculation method for cutting adjustment of spiral bevel gear face hobbing is proposed. This method can arbitrarily specify
Spiral bevel gear is an important transmission part widely used in vehicle, aircraft, machine tool, industrial reducer and other machine
Based on the hobbing processing of spur gear studied by ZHY casting senior engineer team, the tooling and fixture designed
1.Present situation of spur gear machining The processing method of face gear is similar to that of ordinary cylindrical gear,
The aviation industry has high requirements for transmission performance. Face gear transmission is a new transmission mode to realize intersecting
For the face gear with the parameters shown in example 2 in Table 1, the spherical hob is manufactured, and
The coordinate system of face gear hobbing is established, as shown in Figure 7. The fixed coordinate system SH0 (xh0,
With the rapid development of information technology and material technology, many new technical achievements have appeared in the field of
Due to the greatly shortening of the transmission chain, the NC gear hobbing machine reduces the influence of manufacturing error,
For a long time, short service life, poor reliability and heavy structure have become the three major problems restricting the
Gear hobbing machines are divided into vertical and horizontal according to the structural form. Small gear hobbing machines and special
Gear hobbing is cutting by using the meshing principle of helical gear. The essence of hob is a worm, and
With a wide range of varieties and specifications, gears are widely used. They are one of the important basic components
As shown in the figure 1, the tool rack pitch line AB is a straight line. During gear hobbing, AB
The feed motion of hobbing helical gear is a helix, which can be divided into the vertical motion VZ of
As shown in the figure, the machine tool coordinate system s (o-xyz) is established. The X axis and Z axis
The gear hobbing condition of non-circular gear is that the pitch curve is not concave, that is, the radius of
The process of vibration signal transmission caused by self-excited vibration between hob and workpiece in the machining process of machine
The tool radial runout error ∆ mainly affects the tooth profile error of the gear. The modeling is shown in
The schematic diagram of tool forefoot error is shown in the figure. When the cutter is grinding, there is an
There are 24 errors affecting the mutual position of gear hob and workpiece, including 12 motion errors and 12 installation
In the process of gear hobbing machine machining, whether it is machine tool, fixture or meshing motion, there are errors,
The research on non-circular gears with typical pitch curve is a representative direction of non-circular gear design and manufacturing. The
As required, the helical gear hobbing take the modulus of 2.5mm as an example for solid modeling. Using the designed
(1) Outer diameter of gear hob The outer diameter of gear hob not only affects the stability of cutting, but
Gear hob is the most widely used high-efficiency tool. Gears with any number of teeth with the same modulus can
In the parametric design of involute helical cylindrical gear, the meshing motion simulation of helical cylindrical gear and helical surface
Main motion transmission chain: the main motion chain to realize the rotation of gear hobbing hob: motor-1-2-uv-3-4-hob. Among them, UV
Because gears are widely used and used, gear processing machine tools are key equipment in engineering machinery, automobile industry and
Gear hobbing belongs to the generating method, and its principle is equivalent to the meshing transmission of a pair of
Taking MATLAB as a tool, the three-dimensional virtual gear hobbing of high-order elliptical spur gear and helical gear is carried
The shape of tool edge is also an important factor affecting the tooth surface roughness in gear hobbing. Two hole
During gear hobbing, the surface quality at the gear root is determined by the fillet radius and rake angle of
Y3150 gear hobbing machine is selected as the experimental equipment, 6542 tungsten molybdenum high-speed steel, class a gear hob with
Because the gear tooth surface roughness is affected by many factors, the results obtained from different tooth surface measurement directions
In recent years, the machining of mechanical parts is developing in the direction of intelligence and efficiency. With the increasing
The analysis and calculation of the cutting edge length of hob is not important for the gear with medium and
The practice shows that using standard hob to gear hobbing this kind of gear with incorrect method may cause abnormal
In the process of efficient cutting engineering gear processing, an important solution to solve the low efficiency of automatic production
Gear shaft and spline shaft are common parts in mechanical equipment. In the mechanical equipment of metal processing, gear hobbing
There are many methods of gear machining, such as casting, stamping, overstock and cutting, among which the cutting method is
There are many processing methods of gear, but the main methods are gear hobbing, gear shaping, shaving and gear grinding.
When the accuracy of machine tool and hob meet the requirements, the fixture manufacturing and installation accuracy are the main
The main function of the gear shaft is to support rotating parts, achieve rotary motion and transfer torque and power.
