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【Rayclass | 锐课堂】Laser Cutting
Date:2019-12-06Source:Original article

什么是高功率激光切割

What is HIGH-POWER laser cutting?

 

利用高能量密度的激光束

作为“切割工具”对材料进行热切割

公益福彩appUsing high energy density laser beam

as a cutting tool to thermally cut materials

 

 

激光切割有什么特点呢

HIGH-POWER laser cutting stands for?

 

切割质量好

切割效率高

非接触式切割

切割材料的种类多

适应性和灵活性

High Cutting Quality

High Efficiency

Non-contact Cutting

Various Materials

Adaptability and Flexibility

 

什么样的切割质量才是“良品”

遇到不良现象又该怎么解决呢

How to define qualified samples?

How to cut qualified samples?

 

请看

锐科激光如何“玩转”切割工艺

HIGH-POWER laser cutting, all in Rayclass

 

通常,影响切割质量的重要工艺参量有切割速度、激光功率、辅助气体、焦点位置、喷嘴特性及材料材质性能等。可见影响激光切割加工因素很多,如果控制不当或参量把握不准,其切割精度和切割质量将会受到很大的影响。

In general, important process parameters that affect the quality of the cutting quality include cutting speed, laser power, shielding gas, focus position, nozzle characteristics, and material properties. It can be seen that there are many factors affecting the laser cutting process. If the control is improper or the parameters are not accurate, the cutting precision and cutting quality will have a great impact.

 

 

下面让我们就一起来看看

日常加工中比较常见的

切割不良现象和解决方案吧~

Let's take a look at the common cutting defects

and solutions in daily processing

 

 

在实际加工过程中

公益福彩app可能会遇到各种切割不良现象

以氧气碳钢高功率小喷嘴

高速亮面切割技术为例

可能会遇到如下情况

 

 
 

板材上层条纹及下层拖曳线均过于粗糙

 
 

 

 

 

▲向上滑动

可能原因:

 

【1】喷嘴选择过大;

【2】切割气压过大引起过烧;

【3】切割速度过慢引起过烧或过快导致切割不充分;

 

 

 

 

 

解决方案:

 

【1】更换小口径合适喷嘴,举例16mm碳钢亮面切割使用1.4D喷嘴,20mm碳钢亮面切割使用1.6D喷嘴等;

【2】减少气压改善切割断面质量,一般亮面切割气压需求在0.6~0.8Bar之间。

【3】将切割速度调整至当前功率合适的范围(详见锐科激光连续激光器全系列切割参数表)

 

 

 

 

 

 

 

 

 

向上滑动

查看可能原因及解决方案

 

 

 

▲Slide Up

Possible Reason:

 

[1] Nozzle selection is too big;

[2] Excessive cutting pressure causes over-burning;

[3] The cutting speed is too slow, causing excessive burning or too fast, resulting in insufficient cutting;

 

 

 

 

 

Solution

 

[1] Replace small nozzle with suitable nozzle;

[2] Reduce the air pressure to have a brighter face of the cutting edge;

[3] Adjust the cutting speed to a suitable range for the current power;

 

 

 

 

 

 

 

 

 

 

 

 
 

板材上层条纹略显粗糙

有轻微或较深牙口

下层拖曳线较好

 
 

 

 

▲向上滑动

可能原因:

 

【1】喷嘴选型过大;

【2】正向离焦不足;

【3】切割速度较慢;

 

 

 

 

 

 

 

 

 

解决方案:

 

【1】若要达到断面上下全亮,考虑更换小一号口径喷嘴,例如1.6D更换为1.4D;

【2】喷嘴口径不变的情况下,继续增加正向离焦;

【3】将切割速度调整至当前功率合适的范围(详见锐科激光连续激光器全系列切割参数表)

 

 

 

 

 

 

 

 

向上滑动

查看可能原因及解决方案

 

 

 

▲Slide Up

Possible Reason:

 

[1] Nozzle selection is too large;

[2] The defocus amount does not match;

[3] Slower cutting speed;

 

 

 

 

 

 

 

 

Solution:

 

[1] Replace small nozzle with suitable nozzle;

[2] With the nozzle diameter unchanged, continue to increase positive defocus;

[3] Adjust the cutting speed to a range suitable for the current power ;

 

 

 

 

 

 

 

 

 

 

 

 
 

板材断面上层条纹良好

但底部挂渣且影响断面效果

 
 

 

 

 

▲向上滑动

可能原因:

 

【1】正向离焦过大,导致能量不集中形成滞后拖尾;

【2】气压过小导致切割拖尾形成拖曳线滞后产生挂渣;

【3】切割速度过快导致滞后;

 

 

 

 

 

 

 

 

 

解决方案:

 

【1】适当减小正向离焦,其余参数不变,观察底部挂渣情况;

【2】适当增加进给气压,可尝试最多增加至1Bar左右,观察情况;

【3】将切割速度调整至当前功率合适的范围(详见锐科激光连续激光器全系列切割参数表)

 

 

 

 

 

 

 

向上滑动

查看可能原因及解决方案

 

 

 

▲Slide Up

Possible Reason:

 

[1] The forward defocus is too large, causing the energy to be concentrated and forming a lagging tail;

[2] Air pressure feed error: Too small air pressure causes cutting tail to form drag line lag and slag;

[3]Too fast cutting speed leads to lag;

 

 

 

 

 

 

 

 

Solution:

 

[1] Reduce forward defocus appropriately, the remaining parameters remain unchanged, observe the slagging situation at the bottom;

[2] Increase the feed air pressure appropriately, try to increase it to about 1Bar at most, and observe the situation;

[3] Adjust the cutting speed to a range suitable for the current power ;

 

 

 

 

 

 

 

 

 

 

 

在实际加工过程中

进行氮气不锈钢切割时

部分常见问题

 

 
 

不锈钢中薄板切割时遇到分层现象

切割断面粗糙

 
 

 

 

 

▲向上滑动

可能原因:

 

【1】负向离焦量过大,导致产生等离子体,产生蓝光并分层;

【2】喷嘴口径过小;

【3】气压进给过大 ;

 

 

 

 

 

 

 

 

解决方案:

 

【1】减小负向离焦,其余参数不变,观察现象;

【2】更换大一号口径的喷嘴;

【3】适当减小气压进给;

 

 

 

 

 

 

 

 

 

向上滑动

查看可能原因及解决方案

 

 

 

▲Slide Up

Possible Reason:

 

[1] The negative defocus amount is too large, resulting in plasma generation, blue light generation and layering

[2] Nozzle diameter is too small;

[3] Air pressure feed is too large;

 

 

 

 

 

 

 

 

Solution:

 

[1] Reduce negative defocus, the remaining parameters remain unchanged, observe the phenomenon;

[2] Replace the nozzles of the larger size;

[3] Reduce air pressure feed appropriately;

 

 

 

 

 

 

 

 

 

 

 

 
 

不锈钢中厚板切割时遇到未充分切割情况

切割断面未到达板材底部

 
 

 

 

 

▲向上滑动

可能原因:

 

【1】喷嘴选择过小;

【2】负向离焦不足;

【3】气体压力不够,导致未充分切割。

 

 

 

 

 

 

 

 

 

解决方案:

 

【1】更换更大口径喷嘴,增加气体流量;

【2】继续增加负向离焦,使切割断面到达底部;

【3】继续增加气压;

 

 

 

 

 

 

 

向上滑动

查看可能原因及解决方案

 

 

 

▲Slide Up

 

Possible Reason:

 

[1] The nozzle selection is too small;

[2] Defocus amount mismatch;

[3] Insufficient gas pressure, resulting in insufficient cutting

 

 

 

 

 

 

 

 

 

Solution:

 

[1] Replace larger nozzles to increase gas flow;

[2] Continue to increase negative defocus to make the cutting section reach the bottom;

[3] Increase air pressure;

 

 

 

 

 

 

 

 

 

 

 

 
 

不锈钢厚板切割遇到分层现象

调整气压大小和正负离焦量效果均不明显

 
 

 

 

 

▲向上滑动

可能原因:

 

【1】在速度无法得到提升的情况下,激光器能量过于集中,与材料间反应过于剧烈;

【2】喷嘴选型口径过小,导致流量过小;

 

 

 

 

 

 

 

 

 

解决方案:

 

【1】保证峰值功率不变的情况下,适当降低频率和占空比,举例50mm不锈钢切割时,速度无法增加的情况下,考虑将频率调整至200Hz左右,占空比在55~65%之前,可得到较好切割效果;

【2】更换更大口径喷嘴,提高气体流量;

 

 

 

 

 

 

 

 

向上滑动

查看可能原因及解决方案

 

 

 

▲Slide Up

Possible Reason:

 

[1] When the speed cannot be increased, the laser energy is too concentrated and the reaction with the material is too violent;

[2] The nozzle selection diameter is too small, resulting in too little flow;

 

 

 

 

 

 

 

 

Solution:

 

[1] Under the condition that the peak power is constant, reduce the frequency and the duty cycle appropriately.

[2] Replace larger nozzles to increase gas flow;

 

 

 

 

 

 

 

 

 

 

 

如何高效“玩转”激光切割

还看锐科激光

Rayclass has all you need to

know about laser cutting

 

极限切割厚度提升

——媲美传统加工行业

Increasing maximum cutting thickness

On or beyond the level of traditional processing method

 

氧气切割碳钢亮面厚度提升

——速度更快,锥度更小

Increasing cutting thickness of carbon steel

( with Oxygen)

With a faster speed and smaller taper

 

不锈钢中薄板速度提升

——更小气压,更快速度

公益福彩appImproving the cutting speed of

low-to-medium thickness stainless steel

With smaller air pressure and faster speed

 

碳钢中薄板速度提升

——摒氧换氮,速度提升不止一半

Improving the cutting speed of

low-to-medium thickness carbon steel

With Nitrogen for 50% speed increase

 

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