Offset of tool point in computer gong machining

The materials for computer gong machining are usually free cutting steel and copper. The free cutting steel has higher sulfur content and phosphorus content. Sulfur and manganese exist in the steel in the form of manganese sulfide. Manganese sulfide plays a lubricating role in the steel, making the steel easier to cut, thus improving the production progress of lathe bed. So what should be paid attention to when CNC lathe processing?

1. When aligning the workpiece, it is only allowed to move the chuck by hand or turn on the lowest speed for alignment, and do not turn on the high speed for alignment.
2. When changing the rotation direction of the spindle, the spindle should be stopped first and then. It is not allowed to change the rotation direction suddenly.
3. When loading and unloading the chuck, only rotate the V-belt manually to drive the spindle to rotate. It is absolutely forbidden to directly start the machine tool and force it to loosen or tighten. At the same time, a board should be placed on the bed to prevent accidents.
4. The tool installation should not extend too long, the gasket should be flat and straight, and the width should be consistent with the width of the tool bottom surface.

In order to set the knife conveniently, the imaginary point P is often used to set the knife. If there is no tool tip radius compensation, undercut will occur when turning cone or arc. When the accuracy of the part is high and there is a cone or arc, the solution is to calculate the trajectory size of the tool tip arc center, and then compile and calculate the local compensation.

Is the tool position compensation caused by the radius r of tool tip arc when turning dimensional surface. When the tool position compensation is carried out in Z and X directions at the same time, the actual contact point a between the cutting edge and the workpiece moves to the set point P of the tool tip during programming. The compensation amount of R can be calculated by the following formula: when programming the conical surface of the workpiece, the base point coordinates are the coordinates of the base point of the workpiece contour (Z and x) plus the compensation amount of the radius of the tool tip arc R (DZ and DX), thus solving the problem that there is no compensation for the radius of the tool tip arc Questions. Because there is an arc at the tool tip, the workpiece contour is formed by the tool motion envelope, so the motion path of the tool location does not coincide with the contour of the workpiece. In the full function CNC system, the tool compensation instruction can be used to program conveniently according to the contour size of the workpiece. In the economical CNC system, the path of the cutter location can be calculated according to the contour size of the workpiece and the cutter. According to this programming, it can also be solved by the method of local compensation.

In order to improve the work efficiency and reduce the errors of various operations, the safe operation that should be paid attention to in the process of C is summarized as follows:

1. Try to install the clamping material first and then the cutting tool to prevent the hand from touching the tool when installing the clamping material. If the tool has been installed, the worktable should first be moved to the outside to ensure that the clamping material will not interfere with the tool, so as to avoid injury or breakage of the tool.
2. After stopping, it is necessary to observe whether the spindle stops rotating when disassembling the tool.
3. Don’t hold or pinch the edge of the knife when unloading it to avoid scratching.
4. In the process of machining mechanical parts, operators are not allowed to observe the cutting position closely to prevent chips from falling into eyes.
5. The wrench should be placed in the tool storage area after use, not on the y-axis shield or beam.
6. Before CNC machining, check the position of the oil nozzle before opening the oil pump switch to avoid spraying to other positions when flushing oil.
7. When suspending observation during machining clearance, the worktable must be moved away from the cutting position.
8. Inspection. After processing, before disassembling the workpiece, it is necessary to conduct preliminary inspection on the size or appearance of the workpiece. The workpiece can only be disassembled after passing the inspection, so as to avoid positioning problems of secondary processing and scrapping of the workpiece after disassembly. For some key dimension data of the disassembled workpiece, further inspection is needed to meet the requirements.