A netizen asked a few days ago that we often use gears when designing thread molds. Then I would like to ask how the gears are drawn and how the parameters are determined.
This is a technical thing. When you ask the key points, how can the gears be painted? If you have any hobbies in this area, you can take the time to study it. I have never used this gear. I have manually painted it, basically by means of plug-in, so if you really want to hand animation, I will only use UG to draw 3D gears. If there is time, record a video. However, at this time, I can’t figure out a bit. Why do I have to manually draw it? In the process of our actual design, the animation of your hand is the same as the result of using the external plug. For the standard parts, all we need is the result. , not engaged in scientific research, you control what he does.
Because you are here, let’s talk about gears.
First of all, we all know that the role of the gear is to transmit force, it mainly relies on the rotation to transmit power. The use of gears can be traced back to the epoch, and is now widely used in various industries. There are many types of gears, mainly the following, not to mention, the above picture
The most common use in our thread molds is the spur gear and the rack. The umbrella and helical gears are relatively rare. Therefore, the parameters of the spur gear are roughly introduced here.
The spur gear’s tooth line is a straight line that is parallel to the axis and rotates between the two parallel axes. The spur gear is the simplest, the easiest to produce, does not produce axial forces, and can get high precision products. Due to these characteristics, its use is very wide.
When using spur gears in the mold, many netizens ask whether they choose to purchase the standard parts directly or self-processed. I am not very good at answering this question. It can only be said that according to the actual situation, if the mold is Take it to other places for production, or the customer has high requirements for the mold. If the things you have done do not meet the requirements of the customer, then choose to buy it. This is not expensive. If it is said that it is convenient, then it will be done by itself. The first piece of lathe is processed by lathe. After the lathe is processed, there are many burrs. Next, the wire is cut, the surface is oxidized after cutting, and finally the burr is removed.
The material of the gear is generally made of low-carbon alloy steel. After the surface hardness is improved by carburizing and quenching, the surface hardness is generally 55 to 66 degrees HRC. The hardening depth is generally about 1mm, which is mainly determined by the load of the root. The larger the load, the deeper the hardened layer.
The tooth profile of the gear is involute, and its modulus determines the relationship between the size of the gear, the modulus, the number of teeth, the indexing circle, etc., which are listed in the thread mold tutorial. Therefore, it will not be elaborated here.
The gear is the most basic thing in the thread mold. If you want to participate in this public welfare training brother, you have to take a look at the tutorial first.