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Haas Automatic CNC Machinery (Shanghai) Co., Ltd
Process flow of horizontal machining center
Date: 2022-02-21Read: 6
Horizontal machining center refers to a machining center with the spindle axis parallel to the worktable, mainly suitable for machining box type parts. His working principle is that after the workpiece is clamped once on the machining center, the computer can automatically select different cutting tools, change the spindle speed of the machine tool, and complete the machining of multiple surfaces and processes of the workpiece in sequence. His advantage is that he can greatly improve production efficiency, but he occupies a large area and has high costs.
After the workpiece is clamped once on the machining center, the digital control system can control the machine tool to automatically select and replace tools according to different machining processes, automatically change the spindle speed, feed rate, and tool relative motion trajectory of the workpiece, and other auxiliary functions, to complete the machining of multiple surfaces and processes of the workpiece in sequence. And there are multiple functions for changing or selecting knives, greatly improving production efficiency.
Due to the centralization of processes and automatic tool changing, machining centers reduce the time required for workpiece clamping, measurement, and machine tool adjustment, resulting in a cutting time of about 80% of the machine tool start-up time (compared to only 15-20% for ordinary machine tools);
At the same time, it also reduces the turnover, handling, and storage time of workpieces between processes, shortens the production cycle, and has significant economic benefits. Machining centers are suitable for small and medium-sized production with complex part shapes, high precision requirements, and frequent product replacement.
When using a horizontal machining center, attention is not particularly paid to its operating points, and some details are often overlooked.
1. Ensure that all machining tasks of the workpiece are completed within the range of the spindle's travel.
2. Try to complete all processing tasks in one clamping. When it is necessary to replace the clamping point, special attention should be paid not to damage the positioning accuracy due to the replacement of the clamping point, and if necessary, it should be explained in the process documents. The contact between the bottom surface of the fixture and the workbench must ensure that the flatness of the bottom surface of the fixture is within 0.01-0.02mm, and the surface roughness is not greater than Ra3.2um.
3. The fixture should have as few components as possible and high rigidity.
4. In order to simplify positioning and installation, each positioning surface of the fixture should have coordinate dimensions relative to the machining origin.
