What are the common problems of vertical machining centers?

Vertical machining centers are easy to clamp, convenient to operate, easy to observe the processing situation, and easy to debug programs. They are widely used.

The following will explain the common problems and solutions that occur during the use of vertical machining centers.

Common Problem 1: Over-cutting of workpieces

The external causes of overcutting of workpieces are often insufficient tool strength or inappropriate size, while the internal causes may be non-standard operation, improper setting of cutting parameters, or uneven setting of cutting allowances, which leads to excessive tolerances and ultimately results in overcutting of the workpiece and the production of processing errors.

To solve this problem, when adding the corner clearing program, the allowance should be as uniform as possible, the tool should be as large as possible, and the SF function of the vertical machining center should be utilized to fine-tune the degree gradually to achieve the best cutting effect.

Common Problem 2: Inaccurate scoring

Centering is the step for a machining center to determine the origin. It can be said that any operation performed with a machining center is inseparable from this step of centering. Apart from inaccurate manual operation by the operator, burrs around the mold, non-verticality of the four sides, and magnetism of the centering rod can all cause inaccurate centering.

Before the machining center centers the mold, the centering rods need to be demagnetized first. The manual operation of centering should be repeatedly checked. The centering should be kept at the same point and the same height as much as possible. Regularly calibrate the table to check whether the four sides of the mold are vertical.

Common Question 3: Collision

There is a saying in the machining center workshop: Good technology is always achieved through machine collisions. Although collision is now inevitable, as a qualified operator of a machining center, one should be capable of controlling the avoidable factors of collision within the avoidable range. The phenomena that cause machine collisions are diverse. For avoidable factors, it is essential to control them in advance.

Avoidable factors of collision include insufficient safety height setting; There are errors in the tool length and the actual processing depth on the cnc program sheet, and the depth Z-axis fetch and the actual Z-axis fetch are written incorrectly. The coordinates were set incorrectly during programming.

Therefore, the height of the workpiece must be accurately measured to ensure that the safe height of the vertical machining center is above the workpiece. The tools on the CNC program sheet should be consistent with the actual program tools. Try to export the program sheet with pictures as much as possible. Carefully measure the actual depth of processing on the workpiece and clearly write down the length of the tool and the edge length on the program sheet. When taking the actual Z-axis data, it should be clearly written on the program sheet. This operation is manual and needs to be repeatedly checked to ensure accuracy.