Reduced machine accuracy? Five solutions to get it done

For a machine tool, the accuracy is the most important criterion for evaluating the quality of the machine tool. So today lathe machine manufacturer will talk about 5 situations and solutions that will reduce the accuracy of the machine tool.

Case 1: The machine tool can process and the workpiece size is more accurate, but the surface finish of the workpiece is poor

There are four general reasons for this:

The first is that the cutting edge of the tool of the machine tool is not sharp; the second is that the machine tool has resonance at work; the third is that the machine tool has a crawling phenomenon; the fourth is that the processing technology is defective.

Solution:

① The tool is not sharp after it is worn or damaged. Re-sharpen the knife directly or select a better tool to re-set the knife.

② The resonance of the machine tool is mainly due to the uneven placement of the machine tool. It only needs to be adjusted to the horizontal position and fixed firmly.

③ Most of the reasons for the horizontal lathe creep are due to the heavy wear of the carriage guide rails, and the screw balls are worn or loose. This situation occurs because the machine tool is not sufficiently maintained. It is recommended that the wire be cleaned and lubricated in time to reduce friction. It is recommended to perform idle maintenance for 2-3 days. If the processing volume is large, it is best to perform wire cleaning and lubricating oil addition every day. Don't worry too much about lubricant consumption. After all, compared with output, lubrication Oil costs are much lower.

④ If the processing technology is defective, you should choose a higher spindle speed as long as you can meet the processing requirements of other processes, and choose a coolant that is more suitable for workpiece processing.

Horizontal Lathe

Case 2: Different taper sizes of the produced workpiece

There are generally three reasons for this:

The first is that the machine tool is not placed smoothly and there is no horizontal stable placement of the machine tool. The second is that when turning the long axis, the contributing material is relatively hard, the tool eats the knife more deeply, and there is a situation of giving up the tool.

Solution:

① Use a spirit level to adjust the level of the machine tool, lay a solid foundation, and fix the machine tool to improve its toughness;

② Choose a reasonable process and appropriate cutting feed to avoid the force of the tool to give up the tool;

③ Adjust the position of the tailstock so that the ejector pin is consistent with the main shaft.

Case 3: The driver's phase light is normal, but the size of the processed workpiece is different

There are generally three reasons for this:

One is that the carriage of the drilling milling machine tool runs at a high speed for a long time, causing serious wear of the screw rod and the bearing; the second is the deviation of the tool holder after long-term processing and use; There is still a deviation in size.

Solution:

① Use a dial indicator against the bottom of the tool holder, and at the same time edit a fixed cycle program through the system, check the repeat positioning accuracy of the carriage, adjust the screw clearance, and replace the bearing;

② Check the repeated positioning accuracy of the tool holder with a dial indicator, adjust the machine or replace the tool holder;

③ Use a dial indicator to check whether the workpiece is accurately returned to the starting point of the program after processing the workpiece. If possible, repair the spindle and replace the bearing.