Vertical machining centres have a wide range of applications due to their easy installation, operation, and good observation of the machining situation. Vertical machining centreare widely used in the manufacturing industry. However, due to the height of the column and the limitations of the tool changer, it is not possible to machine parts that are too high. Additionally, machining cavities or concave surfaces can be problematic on Vertical machining centres as chips are not easily discharged, which can seriously damage the tool and destroy the machined surface, thus affecting the smooth processing.
In this article, we will discuss how to solve two common problems encountered when using vertical machining centres, namely workpiece overcut and centering inaccuracy.
First, let us look at the cause of workpiece overcut. It is often due to insufficient tool strength or inappropriate size. Internal factors include improper cutting parameters, uneven cutting allowance, and inconsistent tolerance requirements. All these factors result in the production of processing errors that lead to overcut workpieces.
To solve this problem, we recommend adding a clearance program allowing the use of tools as large as possible, for maximum efficiency. It is also advisable to utilize the vertical machining centre SF function for micro-scheduling gradually to make cutting and achieve the best results.
During the commissioning of a vertical machining centre, it is recommended to check the torque and power of the spindle, as well as the endurance of the tool magazine. It is also important to ensure that the tool holders are clean and free from chips and debris, and that the cutting tools are properly installed and tightened to avoid any inaccuracies due to slippage or vibrations.
Another important factor in the commissioning process is the proper centering of the workpiece. The centering process determines the origin of the machining centre from which all subsequent operations depend. Inaccurate centering can be caused by burrs around the mold, non-perpendicular sides, or due to a magnetized centering bar.
To reduce centering inaccuracies, it is recommended that the machining centre demagnetizes the center bar before dividing the mould, this is to prevent positional errors. The manual operation of the center should be checked repeatedly to ensure accurate placement, with each center kept at the same height and point as far as possible. The table should always be calibrated to check whether the four sides of the mold are perpendicular.
In addition to the above, it is important to maintain the cleanliness of the vertical machining center, as dust and chips from the machining process can accumulate and cause inaccuracies. Regular cleaning and maintenance to ensure proper lubrication and adjustment of the linear guides and ball screws will ensure smooth and accurate machining.
The vertical machining centre is a machine with high precision and efficiency, but it requires careful commissioning, maintenance, and management. The commissioning process involves a series of checks and tests to ensure that it is operating optimally and producing high-quality parts. The maintenance process involves keeping the machine clean, appropriately lubricated, and carefully maintained to limit inaccuracies and ensure a long service life.
In conclusion, to commission a vertical machining centre, one must observe the specific precautions and procedures associated with the machine. It is critical to remain alert to the issues of workpiece overcut and inaccurate centering, paying close attention to tool strength and size, cutting parameters, clearing programs, tool holder cleanliness, cutting tool installation and tightening, magnetized centering bars, and mold alignment. By taking care to observe these issues when commissioning the machine, one can ensure that the vertical machining centre operates effectively, producing parts with high accuracy and efficient machining.
Post time: May-31-2023