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铝板的挤压过程表面起泡是由什么原因造成的?

来源:http://www.jndclyyxgs.com  发布时间:2020-12-22 15:52:15  

在铝板的挤压过程中,很容会出现表面起皮或气泡,到底是什么原因造成的呢?该用什么方法来消除呢?现在就由铝板生产厂家为您排异解惑吧!
In the process of aluminum plate extrusion, it is easy to appear surface peeling or bubbles. What is the reason? How to eliminate it? Now let the aluminum plate manufacturer solve the problem for you!
什么是气泡或起皮:在制品表面出现凸形的泡,常见于头、尾部,完整的叫气泡,已破裂的叫起皮。
What is bubble or flaking: convex bubble appears on the surface of the product, common in the head and tail, complete called bubble, has broken called peeling.
一、铝板挤压产生气泡、起皮的原因
1、 Causes of air bubble and peeling during extrusion of aluminum plate
1.挤压筒、挤压垫磨损超差,挤压筒和挤压垫尺寸配合不当,使用的垫片直径差超过允许值;
1. The wear of extrusion cylinder and cushion is out of tolerance, the size of extrusion cylinder and extrusion pad is not matched properly, and the diameter difference of gasket used exceeds the allowable value;
2.挤压筒和挤压垫太脏,粘有油污、水分、石墨等;
2. The extrusion cylinder and pad are too dirty, with oil, moisture, graphite, etc;

 


3.润滑油中含有水;
3. The lubricating oil contains water;
4.铸锭表面铲槽太多,过深,或铸锭表面有气孔、砂眼,组织疏松、有油污等;
4. There are too many grooves on the surface of the ingot, which are too deep, or there are pores and sand holes on the surface of the ingot, and the structure is loose and greasy;
5.更换合金时,筒内未清理干净;
5. The cylinder is not cleaned when the alloy is replaced;
6.挤压筒温度和挤压铸锭温度过高;
6. The temperature of extrusion cylinder and ingot is too high;
7.铸锭温度、尺寸超过允许负偏差;
7. The ingot temperature and size exceed the allowable negative deviation;
8.铸锭过长,填充太快,铸锭温度不均,引起非鼓形填充,因而筒内排气不完全,或操作不当,未执行排气工序;
8. Too long ingot, too fast filling, uneven ingot temperature, resulting in non drum filling, so that the exhaust in the cylinder is not complete, or improper operation, and the exhaust process is not carried out;
9.模孔设计不合理,或切残料不当,分流孔和导流孔中的残料被部分带出,挤压时空隙中的气体进入表面。
9. The design of die hole is unreasonable, or the cutting of scrap is improper. The residual material in the diversion hole and diversion hole is partially carried out, and the gas in the space gap enters the surface during extrusion.
二、铝板挤压产生气泡、起皮的消除方法
2、 Elimination of air bubble and peeling during extrusion of aluminum plate
1.合理设计挤压筒和挤压垫片的配合尺寸,经常检查工具尺寸,保证符合要求,挤压筒出现大肚要及时修理,挤压垫不能超差;
1. Reasonably design the matching size of the extrusion cylinder and the extrusion gasket, check the tool size regularly to ensure that they meet the requirements, repair the big belly of the extrusion cylinder in time, and the extrusion pad shall not exceed the tolerance;
2.工具、铸锭表面保持清洁、光滑和干燥;
2. Keep the surface of tools and ingots clean, smooth and dry;
3.更换合金时,彻底清筒;
3. Clean the cylinder thoroughly when replacing the alloy;
4.经常检查设备和仪器,防止温度过高、速度过快;
4. Check the equipment and instruments frequently to prevent the temperature from being too high and the speed too fast;
5.严格执行工艺规程和各项制度;
5. Strictly implement the process procedures and systems;
6.合理设计、制造工模具,导流孔和分流孔设计成1°-3°内斜度;严格操作,正确剪切残料和完全排气。
6. Reasonable design and manufacture of tools and moulds, the diversion hole and the diversion hole should be designed with an internal slope of 1 ° to 3 ° and the operation should be strictly carried out to cut the residual materials correctly and exhaust completely.
通过专家的答疑解惑,相信大家对铝板挤压产生气泡、起皮的原因及消除方法都有了深刻的了解,在日常生产中避免这些问题,就能减少损耗,提高成品率。
Through the expert's question and answer, I believe everyone has a deep understanding of the causes and elimination methods of bubbles and peeling in aluminum plate extrusion. If we avoid these problems in daily production, we can reduce the loss and improve the yield.