Views: 2 Author: Site Editor Publish Time: 2022-04-06 Origin: Site
1. Boot to prepare
After the machine tool is switched on each time or the machine tool suddenly stops and resets, the machine tool first refers to zero (i.e. returns to zero), so that the machine tool becomes the reference position in the future operation.
2. The clamping workpiece
First clean the surface before being processed chuck。It cannot adhere to oil, iron filings and dust, in addition, with a file (or stone) to remove the burr on the surface of the workpiece. High-speed railways such as clamps must be smoothed out by constant grinding machines on every flat surface. Code iron, nut must be firm, reliable clamping workpiece, several small chuck small workpiece can be directly clamped on the vise; Machine workbench cleaning, iron filings, need to clean dust, oil; The pads are generally placed at the corners of the workpiece. Workpieces with large span need intermediate pressure and equiheight backing iron. According to the size of the drawing, check the length, width and height of the workpiece with a draw rule. When clamping the workpiece, we should consider avoiding the parts of the processing and in the processing of the cutter head may encounter the fixture. After the workpiece is placed on the pad iron, it is necessary to pull the workpiece datum according to the drawing requirements, and check the verticality of the workpiece which has been ground on six sides. After the workpiece pull table must tighten the nut, in order to prevent clamping is not firm so that the workpiece in the processing of the phenomenon of displacement; Pull the table again to ensure that the error is not out of tolerance after clamping.
3. Number of artifacts to touch
The clamping workpiece can be used to touch the number of fixed processing reference zero, the number of touch head can be used photoelectric and mechanical two. There are two kinds of methods: middle collision number and unilateral collision number. The steps of middle collision number are as follows: photoelectric static, mechanical speed 450~600rpm. Points in the touch number manual move table X axis, so that the number of head to touch the workpiece side, when the number of head just touched the workpiece red light, set the relative coordinate value of this point is zero; Then manually move the X axis of the table to touch the other side of the workpiece, and record the relative coordinates when the workpiece is just touched. According to its relative value minus the number of touch head diameter (i.e., the length of the workpiece), check whether the drawings requirements to the length of the workpiece, the number of relative coordinates is divided by 2, income is the middle of the workpiece X axis values, to move the table to the middle of the X axis numerical, put this X axis relative coordinates is set to zero, this is the workpiece zero on the X axis. Record the mechanical coordinate value of zero on the X-axis of the workpiece in one of G54~G59, let the machine tool determine the zero on the X-axis of the workpiece. Check the data carefully again. The steps for setting the zero position of the Y axis of the workpiece are the same as the operation of the X axis.
4. Get all the knives ready
According to the tool data of the programming operation instruction, change the tool to be processed, let the tool touch the height measuring device placed on the datum, when the measuring device red light set the relative coordinate value of this point to zero. Move the tool to a safe place, manually move the tool down 50mm, set the relative coordinate value of this point to zero, this point is the zero position of the Z-axis. Record the mechanical Z value of this point in one of G54 to G59. This completes the work piece X, Y, Z axis zero setting. Check the data carefully again. Unilateral touch number is also according to the above method to touch the side of the workpiece X, Y axis, the relative coordinate value of this point X, Y axis offset touch number of head radius is X, Y axis zero, finally put a point X, Y axis mechanical sitting mark in G54~G59 one of the. Check the data carefully again. Check the correctness of the zero point, move the X and Y axes to the edge of the workpiece, according to the size of the workpiece, visual inspection of the correctness of the zero point. Copy the program files to the computer according to the file path of the programming instruction.
5. Setting of machining parameters
Set the processing spindle speed, set the processing feed speed, set the cutting amount of each side
6. Boot process
At the beginning of each program the tool used must be carefully examined. Began to make feed processing speed to the minimum, single section, rapid positioning, falling knife, feed must concentrate, when there is something wrong with the hand should be put on the stop button to immediately stop, watch tool motion direction to ensure the safety of feed, then slowly increase the feed rate to the right, at the same time to the cutting tool and workpiece cooling fluid or air cooling. Open rough machining shall not be too far away from the control panel, abnormal phenomenon timely stop inspection. After opening thick, pull the table again to ensure that the workpiece is not loose. If so, recalibrate and collision number. In the process of processing to optimize the processing parameters, to achieve the best processing effect.
7. Self-check content and scope
Before processing, the processor must see the content of the process card clearly, clearly know the part, shape, size of the drawing to be processed and know the content of the next process. Before the workpiece is clamped, the blank size should be measured.