First of all, under the premise of aluminum material, the following aspects must be considered:
1. Force majeure factors:
1. The stability of the CNC lathe itself. If it is not for the new CNC lathe or the CNC lathe has not been adjusted after a lot of production and processing, there will be a specification deviation caused by the CNC lathe itself. There are many factors that cause the deviation of the CNC lathe itself:
Mechanical equipment level:
a. The AC servo motor and the ball screw are loose.
b. The ball screw rolling bearing or nut is damaged.
c. The lubrication between the ball screw and the nut is not enough.
Electrical equipment level:
a. Common faults of AC servo motors.
b. There are stains inside the grating ruler.
c. Common faults of servo motor amplifier.
The PMC repair can be carried out at the main parameter level of the system software, so it is omitted.
2. Water cooling deformation after steel production and processing. Most of this cannot be prevented. Pay attention to the application of refrigerants as much as possible during production and processing, and pay attention to the deformation of steel parts after water cooling when carrying out accurate measurement.
2. Preventable elements:
1. Production process
I think most of the specific production and processing deviations are all caused by unscientific production technology. After ensuring the basic production technology (such as “coarse first, then fine, first face and then hole, first large amount and then Chongqing small noodles” or It is basically the key point of the basic production process such as “reducing the frequency of clamping and selecting combined fixtures as much as possible” in the application of tooling and fixtures), try to avoid the production and processing deviation caused by the iron pin to the die-casting parts, because the die-casting parts are very soft and easy to remove. The iron pin is very easy to make the die-casting parts lead to production and processing deviation.
2. Three cutting elements: cutting amount vc, cutting speed f, drilling depth 1ap and compensation of CNC inserts
This line is really not easy to describe in detail. In simple terms, it means that on the premise of ensuring the production and processing quality and the damage of the CNC blade, adjust the main parameters to make full use of the machinability of the CNC blade to maximize the drilling efficiency. Production costs are minimal. In CNC milling machines, there are also factors such as blade damage compensation.
3. Numerical calculation in manual programming and automatic programming
In manual programming, deviations in measurement are common, but most manufacturing today is all automatic programming.
4. Knife setting
Inaccurate tool setting is the factor that leads to specification deviation. Choose a good edge finder as much as possible. If the CNC lathe has an automatic tool setter, you will be stronger. If it is not an edge finder, the tool radius should be compensated, which means Practical work experience.
Post time: Apr-14-2022