How to deal with the size head of CNC woodworking lathe. 5

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If we want the size to be 10 meters, the diameter of the left end is 10 mm, and the diameter of the right end is 11 mm. The diameter of the right side is 1 mm larger than the left one so far... So we can make the right side 9 mm when we draw it, which is 1 mm smaller than the actual size.

Hope it helps.

You can directly make up for it by programming a taper in the program, which is more convenient.

1 It may be that the machine tool is aging. (The accuracy of the machine tool is not good) 2. Whether the knife shaft and tool you choose are reasonable (whether the knife shaft is too small. 3 Is your feed allowance too large? Is the feed rate too fast?

You are formed by the machine clearance, pay attention to the backlash. That is, to eliminate the gap.

The knife was not chosen correctly, so let the knife go. Let's see if it's in the way under the knife. Inspect the knives and 1 to see if there is any wear.

2. The last knife is included. It shouldn't be a lathe problem.

Reasons for the change:

The accuracy of the lathe is not enough. You can try rough turning, semi-finishing, fine turning, when finishing, to ensure that the amount of turning is small, the tip of the knife is sharp. To be honest, if it is not a precision lathe, the cumulative error can easily exceed the tolerance.

The shape of the machined object has many complex patterns, such as ellipses, which are irregular, related to clearance (spindle, guide), the lack of sharpness, the large amount of cutting to the tool, and the coolant also affect the accuracy.

CNC lathes and turning centers are high-precision and high-efficiency automatic machine tools. Equipped with a multi-station turret or a driven turret, the machine tool has a wide range of processing process performance, can process linear cylindrical, oblique cylindrical, circular arc and a variety of threads, grooves, worms and other complex workpieces, with linear interpolation, arc interpolation various compensation functions, and in the mass production of complex parts play a good economic effect.

The main reason for the size of the parts turned out by the lathe is that the parallelism of the spindle and the guide rail is out of tolerance or the wear of the lathe.

The formal name of the "lathe size head" is called "the cylindricity of the outer circle of the fine turn", so there are two possible reasons for this error: 1. The parallelism of the spindle axis and the bed guide rail is out of tolerance; 2. The guide rail of the bed is worn. The judgment method generally looks at the fineness of the machine tool and can be judged in rough steps.

The machine tool is generally the first reason, and the machine tool is relatively old, which is generally the second reason.

Here take CA6140 lathe as an example to illustrate how to solve this problem, the principle of other models of machine tools is the same, smaller than CA6140 machine tools can choose a smaller material, and vice versa.

1. First select a section of 45 steel raw materials with a diameter of about 80 and a length of about 300 without heat treatment as a test rod, rough turning the outer circle after clamping firmly, and then finish turning the outer circle after the material is cooled, and the tool is selected 90 degrees YT cemented carbide outer circle turning tool when finishing 2 tools, and the last tool speed should be 450 rpm, the feed amount, and the knife depth is single-sided. (Note: Centers cannot be used when finishing).

2. Use an outer diameter micrometer to measure which end of the test rod is large and make a record;

3. Use a dial gauge to measure and inspect the bus bar on the rod and the side busbar;

4. First of all, it is necessary to ensure the accuracy of the parallelism of the bus on the spindle to the guide rail of the bed. The error measured by the bus on the test rod minus the error of 1 2 resonance head is the parallelism error of the main drawing axis to the bed guide rail. This error allows the front end to deviate upwards, and the 2 anchor screws at the far left end of the lathe can control this data, tighten a little bit of this data, and vice versa.

5. After adjusting the busbar, the outer circle of a knife is finished, and the measuring head is 250 mm in length on the secondary precision lathe, which is generally controlled in. Allows the backend to be large. This data is out of tolerance, you can adjust the second anchor screw on the far left side of the lathe, if the front end is large, the front one is tight (the side of the station operator is the front) and vice versa.

6. Anchor screws can only be adjusted in a small amount, if the difference between the size and head is more than 0,1, then it is not suitable to use the anchor screws, but to adjust the headstock, CA6140 has 2 adjustment screws below the headstock is specially adjusted to this accuracy, when adjusting, first loosen the 4 fastening screws and 2 adjustable screws of the headstock, and then go in the opposite direction to separate the maximum error of the headstock +, and then basically lock 4 fastening screws and then adjust 2 adjustment screws. Once in place, fully lock the fastening screws.

If it is an ordinary lathe, the parts you process are large inside the inner hole and small inside The outer circle is small and large on the outside It is recommended that you use the inner circle method to correct it Loosen the four screws at the head of the bed and slowly correct it This may have to be done by a more experienced master I don't think it will be the above reason It may be that the large carriage guide rail of the lathe is seriously worn This has to be specially polished The guide rail is generally like this The old bed will be like this I don't understand how to ask it again Typing is hard and not more points.

Which side is bigger, you don't seem to be right, you can't see clearly, you just say whether it's the chuck or the pulley.

There is a problem with the guide rail and the tailstock.