As machining centers are generally developed on the basis of milling machines, they can be called gantry milling machine machining centers, which are conventionally referred to as gantry machining centers. Gantry machining center is one of the most widely used CNC machine tools with the highest output in the world. Its main features are:
CNC gantry machining center.jpg
1. The self-contained tool changing device is added on the basis of the CNC boring machine or CNC energy machine, so that the workpiece can be continuously processed in multiple processes on the workpiece surface after one-time clamping, and the processes are highly concentrated.
2. Generally, it is equipped with an automatic indexing rotary table or spindle box, which can automatically turn the angle, so that the workpiece can automatically complete the multi process processing of multiple planes or multiple angular positions after being clamped once.
3. The machining center can automatically change the spindle speed, feed rate of the machine tool, the movement track of the tool relative to the workpiece and other auxiliary functions
Function.
1、 If the machining center is equipped with an exchange table, while the workpiece is processed on the workbench at the working position, the loading and unloading of other workpieces on the workbench at the loading and unloading position will not affect the normal processing of workpieces.
The above are the common characteristics of the gantry CNC machining center. Taking this opportunity, Jingke Daheng Xiaobian will start from the characteristics of the CNC gantry machining center and introduce the operating procedures to you in detail.
1. The use of equipment is subject to the mechanism of "fixed personnel and fixed personnel", and the operator is required to operate the equipment with the operation certificate. When large equipment is operated by more than one person, there must be a special person to command it.
2. The operator shall be familiar with the main technical performance, structure, maintenance contents and integrity standards of the equipment used.
2、 Preparation before work:
1. Check the transmission system, operating system, lubrication system, pneumatic system, starting position of various switches, safety braking protection device, power voltage stabilization system and electrical indication of the equipment. The above systems shall be complete, correct, sensitive, reliable and intact. Tight parts and connectors shall not be loose.
2. Fill oil for lubrication according to the equipment lubrication chart.
3. Manually run in the main shaft and each servo shaft at low speed.
4. According to the part processing program, check whether the tool compensation value and key offset position in the memory table of the CNC system are correct. Call out the tool compensation value and zero offset value to check whether they are correct.
5. When inputting with paper tape, it is necessary to frequently check whether the paper tape used is damaged and whether the photoelectric reader is normal.
6. The specification of T-bolt used for tight parts shall be consistent with the specification of T-groove on the equipment workbench. When tightening, the force should be moderate. It is forbidden to apply force to correct parts in all parts of the equipment.
7. Check whether the precautions specified in the "machine tool operation manual" are observed. (4) Check items before operation after power on:
Press the NC device power start key "on", and the initial position coordinates of the machine tool will appear on the CRT display. Check the total pressure gauge installed on the upper part of the machine tool. If the reading of the gauge head is "4MPa", it means that the system pressure is normal and formal operation can be carried out.
3、 The correct operation steps are as follows:
1. Use reasonably and operate correctly according to the equipment manual. Overload, performance and standard use are prohibited.
2. When the first piece is programmed for trial processing, the operator shall closely cooperate with the programmer, and the formal processing can be carried out only after confirming that the program is correct.
3. When clamping the cutter, clean the taper hole and positioning of the handle and spindle.
4. The workpiece and cutter must be firmly installed. Prevent collision with the machine tool when loading and unloading the workpiece. Heavy parts and fixtures shall be loaded and unloaded by crane or with the assistance of others.
5. In the process of processing, the operator shall not leave the post without permission or be entrusted with custody, and shall not do anything unrelated to the work. You can press the "pause" button for temporary leave. The "emergency stop switch" shall be used correctly. It is strictly prohibited to switch off and cut off power at will during work.
6. It is forbidden to place work cards, measuring tools, stack parts and irrelevant objects on the guide rail surface and work table of the equipment. It is forbidden to step on the protective covers and wear shoes with metal nails to step on the working table.
7. Pay attention to abnormal phenomena during equipment operation, stop in time in case of failure, take measures, and record and display the fault content. In case of an accident, it is required to stop and cut off the power immediately, protect the site, report in time, do not hide the chest, and cooperate with the competent department to do a good job in analysis and investigation.
4、 Maintenance after work.
1. The operator shall timely clean up the chips and sundries on the equipment, sort out the work site and do a good job in maintenance.
2. After the maintenance of the equipment, the operator shall move the handles and components of the equipment to the original positions. Each workbench shall be oiled for protection, and the power supply shall be cut off according to the specified sequence.
3. Exchange according to the shift handover regulations and make records.
Because the machining center has the above functions and strict operating procedures, it greatly reduces the time for workpiece clamping and measurement, high-speed adjustment of the machine tool, and the time for workpiece turnover, transportation and storage, so that the utilization rate of the cutting time of the machine tool is 3-4 times higher than that of the ordinary machine tool, thus improving the productivity, especially when processing workpieces with complex shapes, high accuracy requirements and complex variety replacement periods, it has good economy.