[Multiple pictures] Misunderstanding of aluminum profile processing Problems that should be paid attention to in aluminum alloy processing

Aluminum alloy processing factory company is a professional high-quality flange manufacturer and aluminum alloy processing factory company. Today our experts will bring you the "misunderstanding of aluminum profile processing" issues that should be paid attention to in aluminum alloy processing&rdquo ;, Hope that through our introduction, you will have a deeper understanding of the misunderstanding of aluminum profile processing and other issues

1) Fast forward and work advance

In the aluminum profile processing program, G00 and G01 can define the linear motion of the tool, but their functions are very different, and beginners are easy to confuse.

The feedrate of work-feeding commands (G01, G02, G03, etc.) is determined by the F command in the program; the feedrates of fast-forwarding commands (G00 and part of the zero return command) are not specified in the machining program, but when setting the machine parameters It is saved in the CNC system as machine parameters.

Work advance instructions not only must ensure the accuracy of the processing end point, but also the accuracy of the processing path and feed rate. This is achieved by microscopic interpolation calculations and dynamic control. The purpose of fast forward instructions is to minimize the idle travel time. When multi-axis linkage, the motion trajectory is unpredictable. Therefore, fast forward instructions cannot be used for processing feeds.

2) Positioning accuracy and repeated positioning accuracy

Machining center manufacturers often only give repeat positioning accuracy but not positioning accuracy indicators in promotional materials, which makes it easy for some users to misunderstand repeat positioning accuracy as the main indicator that determines the machining accuracy of parts. In fact, high repeat positioning accuracy does not mean high parts processing accuracy. Positioning accuracy is the main indicator that determines the machining accuracy of parts. Repeated positioning accuracy reflects the ability of the machine tool to return to the same position multiple times. The measuring method is to fix a dial indicator, press the head of the indicator on the main shaft, and calibrate the dial indicator zero point. Move the main shaft to any position and then return it to the calibrated coordinate position just now, and read the error of the dial indicator. After multiple round-trip readings, the maximum error obtained is the repeat positioning accuracy. According to the current level of numerical control technology and the typical mechanical and electrical matching of machining centers, that is, servo motor, rotary encoder, ball screw or rack and pinion repeated positioning error is generally not more than 2 pulse equivalent, far less than 0.01mm.

Positioning accuracy refers to the ability to accurately move a specified distance on the full stroke of the machine tool. The maximum stroke of the aluminum profile processing center can reach 7 meters, and the positioning accuracy measurement generally uses laser interference

Instrument. The positioning accuracy is mainly affected by the guide rail shape and position error, mechanical clearance, screw/rack error, mechanical deformation and electrical following error. The error data measured by the laser interferometer is input into the numerical control system for processing, and the misunderstanding of aluminum profile processing can obtain high positioning accuracy through the error compensation function of the numerical control system.

Welcome to read: How does the CNC machining machine work? How does CNC process molds?

Because the material of aluminum alloy stamping is softer than metal iron, it is expensive and easy to break. Some aluminum alloy products still need follow-up processing, such as wire drawing, anodizing, etc., which are particularly prone to top scratches and scratches during stamping production. Special attention should be paid to the following points in manufacturing:

　　 1. As far as possible without affecting the number of projects, the punching holes should be arranged behind the project punching as much as possible. Even for products with a large number of punching holes, one more project can be considered and the punching holes should be arranged behind the punching hole.

　　2. The aluminum material is soft and the mold is easy to block. Therefore, when designing the mold gap, a gap of 10% of the thickness of the bilateral material should be placed.

3. When bending and forming, because the aluminum material is easy to produce aluminum chips during bending, it will cause spot damage and indentation. The aluminum raw material needs to be pasted with PE film. In the case of rollers and electroplating, the forming block shall be polished and plated with hard chrome Better.

4. For stamping parts that need to be processed after anode, if there are flattening and flattening processes of 180°, the product cannot be completely compressed. Complete compression will cause acid spitting, and a 0.2-0.3mm seam must be left for acid The liquid flows out smoothly and in time, so a limit block must be made in this process and the calibration mold must be higher than the mold.

　　5. Because aluminum is brittle and easy to crack, especially in the case of reverse folding, try not to make crimping. Even if you do, make the crimping a little wider and lighter.

6. All aluminum knife edges are required to be cut with slow-moving wire to prevent burrs and irregular blanking. Aluminum parts are prone to high temperature, so the punch hardness must be 60° or more, at least SKD11 material or more, no D2 Poor quality punch.

　　Aluminum material is relatively soft, so it is easy to produce top damage, crushing, scratching and deformation during stamping production. In addition to the requirements on the mold, the following points must be done during stamping production:

1. If you want to punch aluminum parts well and reduce the defect rate, you must first do 5S, especially cleaning, including molds, punching table, water line and packaging materials must be free of sharp debris, no dirt, and regular and clear rectification , The mold must be cleaned up and down without debris.

　　2. If the product has a large burr, it must be sent to the mold for repair in time and follow up to the result.

　　3. Aluminum parts are easy to heat up and become hard when they are stacked together. Therefore, when punching and blanking, it is necessary to apply a little pressure plate oil on the material (which can dissipate heat and smoothly dredge the blanking) and then press.

4. For products with more punching holes, you need to clean the surface of the mold to ensure that the mold and product are always clean and free of debris and reduce top damage. If the top damage is found, the problem of the top damage of the mold must be found and solved before proceeding. Production.

　　5. Flattening the mold and pushing the block will produce aluminum scraps, so the aluminum scraps under the pushing block must be cleaned after the production of the pushing block every day.

The above “misunderstanding of aluminum profile processing should pay attention to the problems of aluminum alloy processing”The content introduced is an introduction to the misunderstanding of aluminum profile processing. After reading our article, if you understand High-quality flange manufacturers, aluminum alloy processing plants and more. If you are interested, please click our news list one by one Check.