Computer gong processing – surface treatment

Computer gong processing is a kind of artificial intelligence, which is controlled by computer to complete complex processing. The most complex part of the computer gong lies in the control system. In the high-speed computer gong processing, the computer sends various instructions to control the three-axis servo motors of the machine table to cooperate with each other according to the established route, so as to process various complex processes and ensure high processing accuracy. Today, we will talk about the matters needing attention when starting the main computer gong processing:

1. When the computer gong machining machine tool is started or reset by pressing the emergency stop, it first returns to the reference zero position of the machine tool, so that the machine tool has a reference position for its later operation.
2. Clamping workpiece:
3. Before the workpiece is clamped, the surface should be cleaned, and there should be no oil stain, iron filings and dust during machining of mechanical parts, and the burr on the surface of the workpiece should be removed with a file (or oilstone).
4. The equal high-speed rail used for clamping must be grinded flat by grinding machine to make it smooth and flat. The weight iron and nut must be firm, which can reliably clamp the workpiece. For some small workpieces that are difficult to be clamped, they can be directly clamped on the vise.
5. The worktable of the machine tool shall be clean and free of iron filings, dust and oil stains.
6. Pad iron is generally placed at the four corners of the workpiece, and equal height pad iron should be added in the middle of the workpiece with too large span.
7. According to the size of the drawing, use a ruler to check whether the length, width and height of the workpiece are qualified.
8. When clamping the workpiece, according to the clamping and placing mode of the programming operation instruction, it is necessary to consider avoiding the processing position and the situation that the cutter head may encounter the fixture during the processing.
9. After the precision computer gong processing workpiece is placed on the pad iron, it is necessary to pull the table on the workpiece reference plane according to the drawing requirements. The workpiece length direction error is less than 0.02mm, and the top surface x, Y direction horizontal error is less than 0.05mm. The perpendicularity of the workpiece which has been ground on six sides shall be checked to see if it is qualified.
10. After pulling the watch, the nut must be tightened to prevent the workpiece from shifting in the process due to the loose clamping.
11. Pull the meter again to make sure that the error is not out of tolerance after clamping.
12. Workpiece collision number: for the clamped workpiece, the collision number can be used to determine the processing reference zero position. There are two kinds of collision head: photoelectric type and mechanical type. The collision selection method can be divided into middle collision number and single side collision number. The steps of dividing the collision number are as follows:
13. Collision method: photoelectric static, mechanical speed 450-600 rpm.
14. Manually move the x-axis of the worktable to make the colliding head touch one side of the workpiece. When the bumping head just touches the workpiece and the red light is on, the relative coordinate value of this point is set as zero; after high-speed computer gong processing, manually move the x-axis of the workbench to make the collision head touch the other side of the workpiece. When the collision head just touches the workpiece, record the relative coordinates at this time.
15. According to the relative value minus the diameter of the bumping head (i.e. the length of the workpiece), check whether the length of the workpiece meets the requirements of the drawing.
16. Divide the relative coordinate number by 2, and the value is the middle value of the x-axis of the workpiece. Then move the table to the middle value on the x-axis. Set the relative coordinate value of the x-axis at this point to zero, which is the zero position on the x-axis of the workpiece. With the rapid development of modern machine manufacturing industry, the requirements for machine parts are increasing. Some important parts must work under the conditions of high speed, high temperature, high pressure and heavy load. Any defect in the surface layer not only directly affects the working performance of the parts, but also causes accelerated wear, corrosion and failure of the parts. Therefore, attention must be paid to the surface quality problems.

The machining quality of machine parts, in addition to the machining accuracy, also has the machined surface quality, which is the characterization of the integrity of the surface layer after machining.

The deviation of the actual geometric parameters from the ideal geometric parameters is called machining error. The level of machining accuracy is measured by the size of machining error. If the error is large, the precision will be low, otherwise it will be high.

Machining accuracy includes three aspects: dimensional accuracy, shape accuracy and position accuracy.

① The degree to which the actual shape of the machined part surface is consistent with the ideal part surface shape. The ideal surface shape of parts refers to the absolutely accurate surface geometry.

② Dimensional accuracy the degree of correspondence between the actual size of the machined part surface itself or between the surfaces and the ideal part size. The ideal part size refers to the middle value of the dimension marked on the part.

④ The degree of correspondence between the actual position of each surface of the part and the position between the ideal parts after position precision machining. The position between the surfaces of an ideal part refers to the absolutely accurate position between the surfaces.

Computer gongs processing aluminum alloy surface treatment what

(1) Geometrical characteristics of surfaces

① Surface roughness surface roughness refers to the micro geometric error of the machined surface. The surface roughness of high-speed computer gong machining is usually formed by the moving track of cutting tool in machining, and the ratio of wavelength to wave height is generally less than 50.

② Surface waviness surface transit is a periodic geometric error between macro geometric error (△ *) and micro geometry error (i.e. roughness).