Attention should be paid to CNC precision machining equipment
CNC machining is used in many fields, especially in the mechanical industry. What is the process of CNC machining workshop? It is worth considering in this regard, and we will discuss them in detail below.
Issues to be noted in CNC machining
(1) When the workpiece is too high, it should be divided into rough cuts of different lengths. After use, open the knife and remove the remaining knives.
(2) Cut flat surfaces with fewer ball cutters to reduce processing time; If there is a tilt, use a tilt cutting machine to make integers.
(3) Reasonably set tolerances, balance machining accuracy and calculation time, and reduce multi-step stamping time.
(4) The hardness of the billet is high, while the hardness of the raw material before milling is low. Rough grinding and fine grinding.
(5) The tool material has good toughness and low hardness, making it suitable for rough machining. The tool material has poor toughness and high hardness.
2. CNC machining technology
(1) Fixture methods and fixture selection
The clamping method of CNC machine tool parts should also choose a reasonable positioning reference and clamping scheme. The selection of accurate data should follow the principle of; Unified Data; And“ Baseline Consistency; The principle. In addition to these two principles, they should also be considered. ：
Attempt to process the surface of the positioning fixture and choose a positioning method that is convenient for processing each surface.
When the workpiece is clamped once, all surfaces of the workpiece are machined.
When determining the position of the workpiece on the worktable surface, it is necessary to consider the effects of machining, tool length, and tool stiffness on machining quality.
The fixtures used in the control process should be assembled on common components as much as possible and adjusted to shorten the production preparation period.
(2) Process orders
In order to arrange the processing sequence, we need to follow basic principles, including“ One side and back side; ， “ One thickness” Wait. In addition to these basic principles, we should also follow the following principles:
According to the centralized processing process, avoid tool reuse and reduce the frequency and time of tool replacement.
The pore system has a high degree of concentricity. After a position, process the hole system and then process the other coordinates of the hole system. This eliminates errors caused by repeated positioning and improves the concentricity of the hole system.
Select and identify prompts and change points, once confirmed, they should not be replaced.
