CN100572033C - Micro-bonding method for thermoplastic plastic - Google Patents

Micro-bonding method for thermoplastic plastic Download PDF

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CN100572033C
CN100572033C CN 200710022940 CN200710022940A CN100572033C CN 100572033 C CN100572033 C CN 100572033C CN 200710022940 CN200710022940 CN 200710022940 CN 200710022940 A CN200710022940 A CN 200710022940A CN 100572033 C CN100572033 C CN 100572033C
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laser
welding
diode array
beam
laser diode
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CN 200710022940
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CN101053995A (en )
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刘会霞
季进清
张惠中
霄 王
兰 蔡
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江苏大学
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Abstract

一种热塑性塑料的微焊接方法,涉及激光焊接领域,根据焊接轮廓线的形状调整激光二极管阵列的位置,使激光二极管阵列产生的激光束与焊接轮廓线形状完全相同,激光源发出的光束经分光系统分为等强度的多束光,激光波长为800~1064nm,然后每束光经光纤传输到激光二极管阵列,经激光二极管阵列垂直照射全部的焊接线,对整个焊接轮廓线同时加热,从而把两个重叠的热塑性塑料制品焊接在一起。 Micro-welding method of thermoplastics, the field relates to a laser welding, according to the shape of the weld contour position adjustment of the laser diode array, the beam generated by the laser diode array spectrophotometry laser beam with the same shape contour welding, laser light emitted by the source multi-beam light intensity and the like into the system, the laser wavelength is 800 ~ 1064nm, and each beam is transmitted through the optical fiber to the laser diode array, laser diode array vertically irradiated whole weld line, while heating the entire weld contour, thereby two overlapping thermoplastic articles are welded together. 本发明具有加工时间短、激光束与待焊接零件之间不需要作任何相对移动、热变形量小、适合大批量生产等优点,克服了扫描焊接中焊接线的热变形量不均匀性,可以提高零件的焊接强度、均匀性和效率,并且具有较高的加工柔性。 The present invention has a short processing time, does not require any relative movement between the laser beam and the parts to be welded, the small amount of thermal deformation, suitable for mass production, etc., to overcome the amount of thermal deformation in welding the weld line scanning unevenness, can be improved weld strength, uniformity and efficiency of the parts, and having high processing flexibility.

Description

一种热塑性塑料的微焊接方法 A thermoplastic micro-welding method

技术领域 FIELD

本发明涉及激光焊接领域,特指一种热塑性塑料的微焊接方法,能够实现塑料微型件的高质量、高效率和柔性加工。 The present invention relates to the field of laser welding, especially a thermoplastic micro-welding method, it is possible to realize high quality, efficient and flexible processing of plastic micro parts.

技术背景 technical background

目前热塑性塑料的激光焊接均采用透射焊接原理,即待焊接的两零件重叠放置在一起, 两零件之一能够透过激光而另一个零件必须能吸收激光,然后在两零件接触面(即焊接区域) 形成热作用区;在热作用区(即两零件接触面)中的塑料被熔化,热熔状态下的塑料大分子在焊接压力的作用下互相扩散,产生范德华力,从而紧密的连接在一起,这样已熔化的材料形成接头,待焊接的零件即被连接起来。 Currently laser welding thermoplastics are used transmission welding principle, i.e. two parts to be welded together are placed overlapping, and the other one of the two parts can be parts must absorb laser light through the laser, and then twenty contact surface (i.e., the weld region ) forming a heat acting zone; the plastic is melted in the heat acting zone (i.e. twenty contact surface) of the plastic molecules in the melt state diffusion welding to each other under the effect of pressure, generates van der Waals force to close together , so that the melted material to form a joint, i.e. the parts to be welded are connected. 该原理实质上可以在美国专利US20040056006A1 中知晓。 This principle essentially be known in the US Patent US20040056006A1 in.

目前涉及到两个塑料件的激光焊接方法一般有两种:点焊接;扫描焊接。 Currently two plastic parts involves laser welding method generally two types: spot welding; scan welding. 点焊接,即在零件的不同位置进行激光点焊,激光束光斑的大小即为焊接区域的大小。 Spot welding, i.e., the laser spot at a different position of the part of the laser beam spot size is the size of the weld region. 在实际的生产中, 点焊接的速度较慢、效率较低,不适合于批量的零件加工;点焊接零件不能保证有足够的焊接强度;对于焊接线较长的零件,点焊接无法加工。 In the actual production, spot welding slower, less efficient, is not suitable for batch processing parts; the spot welding part can not guarantee a sufficient bonding strength; parts for longer weld line, the spot welding can not be processed. 扫描焊接,即一束激光投射到待焊接零件,然后激光束沿着待焊接区域的轮廓扫描一周,从而完成焊接。 Scan welding, a laser beam that is projected onto the parts to be welded, then scanning the laser beam along the contours of the area to be welded one week to complete the soldering. 由于扫描焊接是让激光束沿着焊接线扫描一周才能完成,对于焊接线较长的零件,焊接速度就比较慢,而且先连接起来的一部分焊接线会由于塑料的熔化、冷却收缩而影响到后面一部分焊接线的质量,从而影响到整个焊接线的质量、均匀性和强度。 Since the scanning is to let the laser beam welding along the welding line scan to complete one week, for longer part welding line, the welding speed is slow, and the first connecting portion of the weld line may be due to the influence of the molten plastic, cooled to shrink back mass portion of the weld line, thus affecting the quality, uniformity and intensity throughout the welding line.

发明内容 SUMMARY

本发明提出了一种新型的适合于热塑性制品的激光微焊接方法,根据焊接轮廓线的形状调整激光二极管阵列的位置,使激光二极管阵列产生的激光束与焊接轮廓线形状完全相同,激光源发出的光束经分光系统分为等强度的多束光,激光波长为800 ~ 1064 nm, 然后每束光经光纤传输到激光二极管阵列,经激光二极管阵列垂直照射全部的焊接线,对整个焊接轮廓线同时加热,从而把两个重叠的热塑性塑料制品焊接在一起。 The present invention provides a novel method of laser micro-welding of thermoplastic articles suitable for adjusting the position of the laser diode array according to the contour shape of the weld, the laser diode array and the laser beam generated by the same shape contour welding, laser light emitted by the source multi-beam light beam by splitting system into equal strength, laser light having a wavelength of 800 ~ 1064 nm, and the light beam transmitted through each optical fiber to the laser diode array, a laser diode array through all of the weld line perpendicular to the irradiation of the entire weld contour while heating, thereby overlapping the two thermoplastic articles are welded together. 利用本方法进行激光焊接,具有加工时间短、激光束与待焊接零件之间不需要作任何相对移动、热变形量小、 适合大批量生产等优点,克服了扫描焊接中焊接线的热变形量不均匀性,可以提高零件的焊接强度、均匀性和效率,并且具有较高的加工柔性。 With the present method for laser welding, with a short processing time, does not require any relative movement between the laser beam and the parts to be welded, the small amount of thermal deformation, suitable for mass production, etc., to overcome the amount of thermal deformation in welding the weld line scan unevenness, weld strength can be improved, uniformity and efficiency of the parts, and having high processing flexibility.

本发明中的激光源可以为半导体激光器或者YAG激光器,待焊接的热塑性塑料最好是一个白色透明、一个深色,且白色透明塑料位于深色塑料上方,焊接时的激光功率最好为20W〜90W,焊接时间一般为2〜5s。 Laser light source in the present invention may be a semiconductor laser or a YAG laser, the thermoplastic plastic to be welded is preferably a white and transparent, a dark, dark and white transparent plastic positioned above the plastic, welding the laser power is preferably 20W~ 90W, welding time is generally 2~5s. 通过调整激光二极管阵列的位置可以产生任何形状的二维线性激光束。 A two-dimensional linear laser beam may be any shape by adjusting the position of the laser diode array. 本发明特别适合于微型塑料件的焊接。 The present invention is particularly suitable for micro-welding of plastic parts.

其原理是由激光源、分光系统、光纤和激光二极管阵列组成的光路系统,可以通过调整激光二极管阵列的位置来产生满足任何二维线性焊接线的激光束,同时又利用了光纤传输激光,具有较高的柔性,适合于大多数热塑性塑料制品的微焊接。 The principle is the optical system from the laser light source, a spectroscopic system, an optical fiber and a laser diode arrays may be generating a laser beam satisfy any two-dimensional linear weld line by adjusting the position of the laser diode array, while using a fiber laser transmission, having high flexibility, is suitable for most micro-welding of thermoplastic articles.

附图说明 BRIEF DESCRIPTION

下面结合附图对本发明的内容作详细描述-图1为本发明焊接方法原理图图2为实施例1的激光二极管阵列示意图图3为实施例2焊接方法原理图图4为实施例2的激光二极管阵列示意图 Figure 1 is a schematic diagram of a welding method invention, FIG 2 is a schematic diagram of a laser diode array 1 of Embodiment 3 is a schematic diagram of FIG. 2 soldering method of Example 4 Example 2 of the laser - of the DRAWINGS The present invention will be described in detail a schematic view of the diode array

图中:l激光源,2点状激光束,3分光系统,4光纤,5直线型激光二极管阵列,6线状激光束,7焊接线,8白色透明热塑性塑料片,9深色热塑性塑料片,IO激光二极管,II 圆形激光二极管阵列,12圆形激光束,13白色PP塑料,14黑色PP塑料。 FIG: l laser light source, like a laser beam 2 points, 3 spectroscopic system, the optical fiber 4, a linear laser diode array 5, 6 of the linear laser beam, the weld line 7, 8 white transparent thermoplastic sheet, a thermoplastic sheet dark 9 , the IO laser diode, II circular laser diode array, circular laser beam 12, 13 of white plastic PP, PP 14 black plastic.

具体实施方式 detailed description

实施例1用本发明焊接透明PVC和灰色PVC塑料 Example 1 of the present invention with a PVC welding transparent plastic and gray PVC embodiment

本发明的焊接方法原理如图1所示,由激光源l,点状激光束2,分光系统3,光纤4和直线型激光二极管阵列5,线状激光束6,焊接线7,白色透明热塑性塑料片8和深色热塑性塑料片9组成。 The method of welding the principles of the present invention shown in Figure 1, a laser source L, punctiform laser beam 2, the spectral system 3, the optical fiber 4 and a linear array of laser diodes 5, 6 linear laser beam, the weld line 7, a transparent thermoplastic white a plastic sheet 8 and a plastic sheet 9 dark thermoplastic composition. 激光源1发出的点状激光束2经分光系统3分为等强度的多束光,然后每束光经光纤4传输到直线型激光二极管阵列5,本实施例中每个激光二极管10的最大输出功率为200mW,经直线型激光二极管阵列5后转变为线状激光束6,线状激光束6为直线, 宽度为2mm,长度为15mra。 Multi-point laser beam emitted from the laser light source 1 via the beam splitting system 3 is divided into 2 equal strength, and each beam via a transmission optical fiber 4 to 5 linear laser diode array, in this case the maximum embodiment each laser diode 10 output power of 200mW, after the transition linear laser diode array 6 5 a linear laser beam, the linear laser beam 6 linearly, a width of 2mm, a length of 15mra. 经直线型激光二极管阵列5发出的线状激光束6与焊接线7 的形状完全相同,并垂直照射全部的焊接线7,焊接线7位于白色透明热塑性塑料片8和深色热塑性塑料片9之间的接触表面。 By linear laser diode array 5 linear laser beam 6 emitted from the weld line 7 with the same shape and all of the vertical weld line 7 is irradiated, the weld line 7 is located in a white transparent thermoplastic plastic sheet 8 and a plastic sheet 9 of thermoplastic dark the contact surface between. 在白色透明热塑性塑料片8和深色热塑性塑料片9(白色透明热塑性塑料片8能够透过激光,深色热塑性塑料片9能够吸收激光)的接触表面,线状激光束6被吸收,并形成热作用区。 A contact surface on white transparent thermoplastic sheet 8 thermoplastic sheet 9 and dark (white transparent thermoplastic sheet 8 can be transparent to laser capable of absorbing laser light, dark thermoplastic sheet 9) of the linear laser beam 6 is absorbed and form thermal effect zone. 在热作用区(即两零件接触面)中的塑料被熔化,热熔状态下的塑料大分子在焊接压力的作用下互相扩散,产生范德华力,从而紧密的连接在一起,这样已熔化的材料形成接头,白色透明热塑性塑料片8和深色热塑性塑料片9即被连接起来。 The plastic is melted in the heat acting zone (i.e. twenty contact surface) of the plastic molecules in the melt state diffusion welding to each other under the effect of pressure, generates van der Waals force, thereby tightly connected together, so the molten material form a joint, white transparent thermoplastic sheet 8 and a plastic sheet 9 i.e. thermoplastic dark connected. 其中的直线型激光二极管阵列5可以根据不同零件的线性焊接线进行调整,从而满足不同零件的焊接要求,具有很高的适应性。 Wherein the linear laser diode array 5 may be linear weld line adjustment of the different parts, to meet the requirements of different parts of the welding, with high adaptability. 该激光装置采用了分光系统3、光纤4和直线型激光二极管阵列5进行激光传输,具有很髙的柔性。 The apparatus uses a laser spectroscopy system 3, the optical fiber 4 and 5 linear laser diode array laser transmission, Gao having very flexible. 在焊接不同形状的线状焊接线时,只需调整直线型激光二极管阵列5的位置及更换分光系统3即可,简单灵活。 Linear weld line during welding of different shapes, just adjust the linear position of the laser diode array and replacement of the spectral system 3 to 5, is simple and flexible. 这里描述的激光源l是半导体激光器,其激光波长为808nm,焊接时的激光功率为30W,光斑直径1.5mm,焊接时间3s。 L laser light source is a semiconductor laser described here, which is a 808nm laser wavelength, laser power is 30W welding, spot diameter 1.5mm, welding time 3s. 这里描述的白色透明热塑性塑料片8和深色热塑性塑料片9分别是透明PVC和灰色PVC塑料,焊接时透明PVC在灰色PVC塑料上面。 White transparent thermoplastic sheet 8 described herein and dark thermoplastic sheet 9 are gray and transparent PVC PVC plastic, transparent PVC welding described above in gray PVC plastic. 本实施例中采用了简单的搭接焊的形式,实际上热塑性塑料激光透射微焊接的其它焊接形式都是简单搭接焊形式的变形,如T型焊接等。 The present embodiment uses a simple form of lap welding, laser welding other thermoplastics actually forms transmission micro-welding lap welding is a simple form of modification, such as T-type welding.

本实施例的直线型激光二极管阵列5如图2所示,根据焊接线的长度15mm与宽度2mm 调整激光二极管10的位置与数量,从而满足焊接线的要求。 Linear laser diode array of the present embodiment 5 shown in FIG. 2, the position adjustment of the laser diode 10 according to the length and the number of weld line width of 15mm and 2mm, so as to meet the requirements of the welding line. 具体操作时,可以用感光纸来确定线状激光束6的宽度与长度,然后再对激光二极管10的位置与数量进行微调即可。 Specific operation, the printing paper can be used to determine the width and length of the linear laser beam 6, and then the position and number of laser diode 10 can be finely adjusted.

实施例2用本发明焊接白色PP和黑色PP塑料实施例2焊接方法如图3所示,激光源1发出的点状激光束光束2经分光系统3分为等强度的多束光,然后每束光经光纤4传输到圆形激光二极管阵列11,本实施例中每个激光二极管16的最大输出功率为150mW,经圆形激光二极管阵列11后转变为圆形激光束12, 圆形激光束12的宽度为L5mm,形状为圆,半径25mm。 2 with the welding method of the present invention in Example 2 PP welding white and black plastic PP embodiment illustrated embodiment, point-like laser beam emitted from the laser light source 1 via the beam splitting system 3 is divided into 2, etc. FIG. 3 multibeam light intensity, and each of beam transmitted through the optical fiber 4 to the circular laser diode array 11, the present embodiment the maximum output power of each laser diode 16 is 150mW, laser diode array by circular laser beam 11 into a circular beam 12, circular laser beam width 12 is L5mm, the shape of a circle, the radius of 25mm. 经圆形激光二极管阵列11发出的圆形激光束12与焊接线7的形状完全相同,并垂直照射全部的焊接线7,焊接线7位于白色PP塑料13和黑色PP塑料】4之间的接触表面。 By circular laser diode array 11 emit circular laser beam 12 with the same shape of the weld line 7, and irradiated vertically all of the weld line 7, the weld line 7 is located between the contacts 4] 13 white and black plastic PP PP plastic surface. 在白色PP塑料13和黑色PP塑料14 (白色PP塑料13能够透过激光,黑色PP塑料14能够吸收激光)的接触表面,圆形激光束12 被吸收,并形成热作用区。 The contact surface 13 on white and black plastic PP 14 PP plastic (PP white plastic 13 capable of absorbing the laser beam can be transparent to laser, black plastic PP 14), the circular laser beam 12 is absorbed, and the heat acting zone is formed. 在热作用区(即两零件接触面)中的塑料被熔化,热熔状态下的塑料大分子在焊接压力的作用下互相扩散,产生范德华力,从而紧密的连接在一起,这样已熔化的材料形成接头,白色PP塑料13和黑色PP塑料14即被连接起来。 The plastic is melted in the heat acting zone (i.e. twenty contact surface) of the plastic molecules in the melt state diffusion welding to each other under the effect of pressure, generates van der Waals force, thereby tightly connected together, so the molten material form a joint, white 13, and black plastic PP 14 PP plastic i.e. connected. 其中的圆形激光二极管阵列1〗可以根据不同零件的焊接线进行调整,从而满足不同零件的焊接要求,具有很高的适应性。 Wherein the circular array of the laser diode 1 may be based on different parts〗 weld line adjustment, to meet the requirements of the different parts welding, with high adaptability. 这里描述的激光源1是半导体激光器,其激光波长为808nm,焊接时的激光功率为20W,光斑直径1 mm,焊接时间2s。 A laser light source described herein is a semiconductor laser, which laser wavelength of 808nm, the laser power during welding is 20W, a spot diameter of 1 mm, weld time 2s. 焊接时白色PP塑料13要放在黑色PP塑料14 上面,以便激光能够透过上层白色PP塑料13,然后在白色PP塑料13和黑色PP塑料14 之间的接触表面被吸收。 White plastic welding PP 13 PP plastic to be placed on a black top 14, so that the laser can pass through the upper layer 13 White PP plastic, and is absorbed in the contact surface between the white plastic PP 14 PP 13 and black plastic. 本实施例中釆用了简单的搭接焊的形式,实际上热塑性塑料激光透射微焊接的其它焊接形式都是简单搭接焊形式的变形,如T型焊接等。 Preclude the use of this embodiment, a simple form of lap welding, laser welding other thermoplastics actually forms transmission micro-welding lap welding is a simple form of modification, such as T-type welding.

本实施例的圆形激光二极管阵列11如图4所示,根据圆形焊接线的半径25mm与宽度1.5mm调整激光二极管10的位置与数量,从而满足焊接线的要求。 Circular laser diode array of the present embodiment shown in FIG. 11, the width adjusting The radius of the circular weld line 4 of 25mm 1.5mm laser diode 10 to the number of positions, to meet the requirements of the welding line. 具体操作时,可以用感光纸来确定圆形激光束12的宽度与半径,然后再对激光二极管10的位置与数量进行微调即可。 Specific operation, the printing paper can be used to determine the radial width of the circular laser beam 12, then the position and number of laser diode 10 can be finely adjusted. 可以看出通过调整激光二极管10的位置与数量,可以产生任何形状的二维焊接线。 It can be seen that by adjusting the position and number of the laser diode 10 can generate any two-dimensional shape of the weld line.

Claims (4)

  1. 1、一种热塑性塑料的微焊接方法,其特征在于:根据焊接轮廓线的形状调整激光二极管阵列的位置,使激光二极管阵列产生的激光束与焊接轮廓线形状完全相同,激光源(1)发出的光束经分光系统(3)分为等强度的多束光,激光波长为800~1064nm,然后每束光经光纤传输到激光二极管阵列,经激光二极管阵列后垂直照射全部的焊接线,对整个焊接轮廓线同时加热,从而把两个重叠的热塑性塑料制品焊接在一起。 1, a thermoplastic micro-welding method, which is characterized in that: The shape of the weld contour position adjustment of the laser diode array, the laser beam with the same shape contour welding, laser diode array produced by a laser source (1) emits multi-beam light beam by splitting system (3) is divided into equal strength, the laser wavelength is 800 ~ 1064nm, and each beam is transmitted through the optical fiber to the laser diode array, a laser diode array after all of the weld line perpendicular to the irradiation of the entire contour welding while heating, thereby overlapping the two thermoplastic articles are welded together.
  2. 2、 根据权利要求1所述的一种热塑性塑料的微焊接方法,其特征在于:激光源为半导体激光器或者YAG激光器。 2. The micro-welding method of the thermoplastic of claim 1, wherein: the laser source is a semiconductor laser or a YAG laser.
  3. 3、 根据权利要求1所述的一种热塑性塑料的微焊接方法,其特征在于:待焊接的热塑性塑料一个为白色透明、 一个为深色,且白色透明塑料位于深色塑料上方。 3. The micro-welding method of the thermoplastic of claim 1, wherein: the thermoplastic plastic to be welded is a transparent white, is a dark, dark and white transparent plastic positioned above the plastic.
  4. 4、 根据权利要求1所述的一种热塑性塑料的微焊接方法,其特征在于:焊接时的激光功率为20W〜90W,焊接时间为2~5s。 4. The micro-welding method of the thermoplastic of claim 1, wherein: the laser power when welding is 20W~90W, welding time is 2 ~ 5s.
CN 200710022940 2007-05-25 2007-05-25 Micro-bonding method for thermoplastic plastic CN100572033C (en)

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FR2959692B1 (en) * 2010-05-07 2013-12-27 Renault Sa An assembly of two pieces of thermoplastic material by laser welding by transparency and assembly METHOD
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CN104037060B (en) * 2014-05-14 2017-06-30 京东方科技集团股份有限公司 Preparing polycrystalline metal oxide pattern

Citations (2)

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Publication number Priority date Publication date Assignee Title
CN1443103A (en) 2000-04-11 2003-09-17 布兰森超音波学公司 Light guide for laser welding
EP1393848A1 (en) 2002-08-30 2004-03-03 Hella KG Hueck & Co. Laser welding device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1443103A (en) 2000-04-11 2003-09-17 布兰森超音波学公司 Light guide for laser welding
EP1393848A1 (en) 2002-08-30 2004-03-03 Hella KG Hueck & Co. Laser welding device

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