Four-axis machining center
Machining center: usually refers to a CNC milling machine with a tool magazine. CNC milling machine is also called CNC (Computer Numerical Control) milling machine. CNC milling machine is an automatic processing equipment developed on the basis of general milling machine. The processing technology of the two is basically the same, and the structure is also somewhat similar. CNC milling machines are divided into two categories: without tool magazine and with tool magazine.
Four-axis: Generally, when the workpiece is not positioned in space, it has six degrees of freedom, three linear displacement freedoms of X, Y, and Z and three corresponding rotational displacement freedoms of A, B, and C. Spend. Usually what we call a three-axis machining center processes objects through the three linear axes of X, Y, and Z. Four-axis is the addition of the A rotation axis on the basis of the three-axis, that is, the object is processed on the four degrees of freedom of displacement: X, Y, Z, and A.
Extended information:
1. Machining centers are often divided into vertical machining centers and horizontal machining centers according to the state of the spindle in space. The spindle of the machining center is vertical in space. The machining center is called a vertical machining center, and the spindle is horizontal in space is called a horizontal machining center. The spindle can be converted vertically and horizontally, which is called a vertical and horizontal machining center or a five-sided machining center, also called a composite machining center.
2. According to the number of motion coordinates of the machining center and the number of coordinates controlled simultaneously: there are three-axis two-linkage, three-axis three-linkage, four-axis three-linkage, five-axis four-linkage, six-axis five-linkage, etc. Three-axis and four-axis refer to the number of motion coordinates the machining center has, and linkage refers to the number of coordinates the control system can control at the same time, thereby achieving position and speed control of the tool relative to the workpiece.
3. According to the number and functions of worktables: there are single workbench machining centers, double workbench machining centers, and multi-workbench machining centers.
4. According to processing accuracy: there are ordinary machining centers and high-precision machining centers. An ordinary machining center has a resolution of 1 μm, a maximum feed speed of 15 to 25 m/min, and a positioning accuracy of about 10 μm. High-precision machining center, resolution is 0.1μm, maximum feed speed is 15~100m/min, and positioning accuracy is about 2μm. Those between 2 and 10 μm, with more ±5 μm, can be called precision grade.
Reference: Baidu Encyclopedia - CNC machining center