| Publication number | CN104694922 B |
| Publication type | Grant |
| Application number | CN 201510142568 |
| Publication date | Jun 13, 2017 |
| Filing date | Mar 30, 2015 |
| Publication number | 201510142568.1, CN 104694922 B, CN 104694922B, CN 201510142568, CN-B-104694922, CN104694922 B, CN104694922B, CN201510142568, CN201510142568.1 |
| Inventors | 宋立军, 张屹, 胡仲勋, 肖先锋 |
| Applicant | 湖南大学 |
| Export Citation | BiBTeX, EndNote, RefMan |
| Patent Citations (3), Classifications (1) | |
| External Links: SIPO, Espacenet | |
一种环孔式激光同轴送粉喷嘴 A cyclic laser bore coaxial powder nozzle
技术领域 FIELD
[0001] 本发明涉及激光加工技术领域，尤其涉及一种环孔式激光同轴送粉喷嘴。 [0001] The present invention relates to a laser processing technology field, particularly to a laser annular ring coaxial powder nozzle.
背景技术 Background technique
[0002] 激光熔覆成形（也称激光近形制造）是以激光作为加工热源，以金属粉末为原材料，利用“离散+堆积”的增材成形思想，在金属基板上逐层熔覆堆积，从而形成金属零件的制造技术。 [0002] Laser cladding forming (also known as laser for producing near-shape) is a laser as a heat source processing, metal powder as raw material, the use of "stacked discrete +" increase the forming material thought cladding layer by layer deposited on a metal substrate, thereby forming metal parts manufacturing technology. 应用该技术可直接制造出具有复杂形状和良好机械性能的全致密金属零件，也可对具有复杂形状、一定深度制造缺陷、误加工或服役损伤零件的修复和再制造。 Direct application of this technology for producing a fully dense metal parts with complex shapes and good mechanical properties, also having a complicated shape, a certain depth manufacturing defects, erroneous processing service or repair damaged parts and remanufacturing.
[0003] 激光熔覆成形系统主要包括大功率激光器、导光及聚焦光路系统、数控装置、金属粉末输送装置、检测与控制装置等。 [0003] Laser cladding forming system includes a high power laser, a light guide and focusing optical system, the numerical control device, the metal powder conveying means, detecting and control devices. 其中金属粉末输送是一项关键技术，它直接影响着金属沉积的质量和效率。 Wherein the metal powder delivery is a key technology, which directly affects the quality and efficiency of metal deposition. 常用的激光熔覆成形同步送粉方式主要有侧向送粉和同轴送粉。 A typical laser cladding forming powder feeder synchronized main and lateral coaxial powder feed powder. 但侧向送粉无法克服因激光束和粉末流场的不对称而带来对扫描方向限制的缺点，从而限制了其在激光熔覆成形上的应用。 But can not overcome the powder feed side of the laser beam and the powder flow field asymmetry brought drawbacks limit the scanning direction, thus limiting its application in laser cladding formed.
[0004] 同轴送粉粉末流能够和激光同轴耦合输出，有效地克服了侧向送粉的缺点。 [0004] Moliu another on the coaxial coupling and a coaxial output of the laser can be effectively overcome the shortcomings of the powder feeding side. 目前， 激光熔覆成形所采用的同轴送粉喷嘴主要有两种形式：四管式同轴送粉喷嘴和锥环式同轴送粉喷嘴。 Currently, laser cladding forming employed coaxial powder nozzle is mainly in two forms: four coaxial powder nozzle, and the cone ring coaxial powder nozzle. 美国Sandia国家实验室用于激光近净成形技术的同轴喷嘴采用的是四管式同轴送粉喷嘴(美国专利U • S • Pat. 6046426)，由于粉末出口离基板距离较远，不易出现堵塞粉末通道和喷嘴过热现象，且四路粉路管相对独立，能够实现三维激光直接制造和再制造;但是，该同轴送粉喷嘴存在粉末汇聚性不高（利用率低），从而影响沉积效率和质量。 Sandia National Laboratory coaxial nozzle for the laser near net shape technique uses four coaxial powder nozzle (U.S. Patent No. U • S • Pat. 6046426), since the powder outlet distant from the substrate, less prone to nozzle clogging and overheating powder channel, and four independent powder passage pipe can be manufactured directly and three-dimensional laser remanufacturing; however, the presence of the coaxial powder nozzle is not high aggregation powder (utilization rate), thus affecting the deposition efficiency and quality. 德国Fraunhofer研宄所采用环隙式同轴送粉喷嘴(美国专利USPat.6316744)通过优化粉末通道结构，大大的提高了粉末的利用率;但其结构过于复杂，且当激光头倾斜，尤其是大角度倾斜时，粉末在重力作用下会出现偏聚，导致喷嘴出口粉末流均匀性相对较差，使用范围具有很大的局限性。 German Fraunhofer study based powder employed by optimizing the channel structure, greatly improving the utilization of powder annulus coaxial powder nozzle (U.S. Patent No. USPat.6316744); but the structure is too complicated, and when the laser head is inclined, especially the inclination angle is large, there will be segregation of the powder under gravity, the flow of powder nozzle outlet leading to relatively poor uniformity, using a range of significant limitations. 华南理工大学研制的孔式同轴送粉喷嘴(CN 27077773Y)，清华大学采用垂直装卸的分体式激光熔覆同轴送粉喷嘴(CN 1255411A)，此类送粉喷嘴都存在上述类似的问题。 South China University of coaxial holes developed powder nozzle (CN 27077773Y), Tsinghua vertical split laser cladding coaxially detachably powder nozzle (CN 1255411A), there is such a powder nozzle is similar to the above problems. 现有的同轴送粉喷嘴无法同时满足粉末高汇聚性和激光三维应用。 Existing coaxial powder nozzle can not simultaneously satisfy high aggregation powder and laser three-dimensional applications.
发明内容 SUMMARY
[0005] 本发明要解决的技术问题是克服现有技术的不足，提供一种结构简单、粉末流汇聚性高、在喷嘴一定倾斜时仍能获得均匀的粉末流、激光熔覆效率高的环孔式激光同轴送粉喷嘴。 [0005] The present invention is to solve the technical problem to overcome deficiencies of the prior art, to provide a simple structure and high aggregation powder flow, powder flow can still be obtained even when the nozzle of a certain inclination, high efficiency laser cladding ring laser hole coaxial powder nozzle.
[0006] 为解决上述技术问题，本发明采用以下技术方案： [0006] To solve the above problems, the present invention employs the following technical solution:
[0007] 一种环孔式激光同轴送粉喷嘴，包括中空的锥状喷嘴主体，所述锥状喷嘴主体的大径端设有可与激光头连接的连接套筒，所述锥状喷嘴主体上设有四个周向均匀布置的进粉通道，所述进粉通道的入口设于锥状喷嘴主体的大径端，所述进粉通道的出口设于锥状喷嘴主体的小径端，所述锥状喷嘴主体的小径端设有一中空的环孔锥头，所述环孔锥头大径端的端面上设有环形粉末稳流槽，所述环形粉末稳流槽与所述进粉通道连通，所述环孔锥头小径端的端面上设有多个周向均匀分布的出粉小孔，所述出粉小孔与环形粉末稳流槽连通，各所述出粉小孔的粉末流汇集于一点。 [0007] A ring laser bore coaxial powder nozzle, the nozzle comprising a tapered hollow body, said tapered end of the nozzle body is provided with a large diameter connecting sleeve can be connected to the laser head, the tapered nozzle four weeks intake passage is provided with powder uniformly disposed on the body, into the powder inlet passage provided in the large diameter end of a tapered nozzle body, into the powder outlet passage provided in the small-diameter end of a tapered nozzle body, the tapered end of the nozzle body is provided with a small-diameter hollow cone annular ring, said ring end face of the large diameter end of the cone hole is provided with an annular groove steady flow of the powder, the powder of the annular groove and the intake swirl passage powder communication end face of the small-diameter end of the cone ring hole is provided to the powder uniformly distributed apertures, said a plurality of circumferential apertures powder steady flow communication with the annular groove powder, the powder of each of the powder flow apertures bringing together at one point.
[0008] 作为上述技术方案的进一步改进： [0008] As the foregoing technical solution further improvement:
[0009] 所述锥状喷嘴主体的内孔内设有中央水冷套，所述中央水冷套外表面设有多个相互连通的环形凹槽，所述锥状喷嘴主体上分别设有冷却水进口和冷却水出口，所述冷却水进口和冷却水出口均与所述环形凹槽连通。 [0009] The tapered inner bore of the nozzle body provided with a central water-cooling jacket, the outer surface of the central water cooling jacket is provided with a plurality of annular grooves communicated with each other, it is provided on the cooling water inlet cone nozzle body and a cooling water outlet of the cooling water inlet and cooling water outlet are in communication with the annular groove.
[0010] 所述中央水冷套外表面与所述锥状喷嘴主体的内孔的侧壁之间设有密封圈。 [0010] The central seal is provided between the water jacket and the outer surface of the sidewall of the tapered bore of the nozzle body.
[0011] 所述锥状喷嘴主体上还设有四个周向均匀布置的保护气体通道，所述保护气体通道与所述进粉通道交错布置，所述保护气体通道与所述锥状喷嘴主体的内孔连通。 [0011] further provided four weeks the protective gas passage disposed uniformly on tapered nozzle body, said shielding gas passage and the intake passage are staggered powder, the protective gas nozzle passage with the tapered body communication hole.
[0012] 所述出粉小孔的中心线与所述锥状喷嘴主体轴线的夹角为a，l〇°<a彡30°。 [0012] The flour aperture angle of the conical centerline axis of the nozzle body is a, l〇 ° <a Pie 30 °. 所述出粉小孔的直径为D，数量为N个，0.8mm彡D彡1.5mm，10彡N彡30。 The flour aperture diameter is D, a number N, 0.8mm San D San 1.5mm, 10 San San N 30.
[0013] 所述环孔锥头通过连接螺栓与锥状喷嘴主体的小径端可拆卸的连接。 [0013] The annular ring cone detachably connected by a small-diameter end of the tapered bolt body is connected to the nozzle.
[0014]所述环形粉末稳流槽的宽度与所述进粉通道的直径相等，所述环形粉末稳流槽的深度大于出粉小孔孔深的二分之一。 [0014] The width of the annular groove and the steady flow of powder into the powder channel of equal diameter, the depth of the annular groove is greater than the steady flow of powder out of the powder one-half the depth of the keyhole.
[0015] 所述连接套筒通过调节螺栓与所述锥状喷嘴主体连接。 [0015] The connecting sleeve is connected to the nozzle body by means of tapered adjustment screws.
[0016] 所述锥状喷嘴主体大径端的端面上设有一环形安装槽，所述连接套筒外表面套设有一调节套筒，所述调节套筒与所述环形安装槽螺纹连接，所述调节套筒伸出所述环形安装槽的外表面上设有四个均匀分布的对中螺钉。 [0016] The end face of the large diameter end of a tapered nozzle body provided with an annular mounting groove, the connecting surface of the outer sleeve jacket is provided with an adjusting sleeve, the adjusting sleeve and the threaded annular mounting groove, the the outer surface of the adjustment sleeve projecting annular mounting groove is provided with four centering screws uniformly distributed.
[0017] 与现有技术相比，本发明的优点在于： [0017] Compared with the prior art, advantages of the present invention:
[0018] (1)本发明的环孔式激光同轴送粉喷嘴，连接套筒、锥状喷嘴主体和环孔锥头的内孔形成激光束通道，各出粉小孔的粉末流可与激光束汇集于一点，粉末经由进粉通道，到达环形粉末稳流槽，粉末在环形粉末稳流槽内聚集后，再通过多个出粉小孔喷出，激光束穿过激光束通道与出粉小孔喷出的粉末流汇聚成一点，对加工件进行加工、熔覆、修复和再制造等，本发明的送粉喷嘴，采用具有聚集作用的环形粉末稳流槽，送粉喷嘴在大角度倾斜情况下，能够获得均匀、小聚焦粉斑、高挺度的粉末流，保证金属沉积过程中金属粉末与聚焦激光的充分作用，提高沉积效率和精度，有效地克服了送粉喷嘴在大倾角加工时由于重力作用而出现的粉末偏聚现象，确保粉末聚焦的均匀性，提高了加工效率。 [0018] (1) an annular ring coaxial type laser according to the present invention, the powder nozzle, the inner bore of the sleeve is connected, the nozzle body and the tapered cone are formed annular ring laser beam path, each of the powder powder flow apertures may be together at one point of the laser beam, the powder through the powder inlet passage to an annular groove steady flow of the powder, the powder after the powder annular groove aggregation steady flow, and then discharged through the plurality of apertures flour, laser beam passes through the laser beam and the powder passage converging powder flow orifice discharge point, for processing a workpiece, cladding, repair and remanufacturing, powder-feeding nozzle of the present invention, a powder of an annular groove having a steady flow of aggregation, powder nozzle at a large angle inclined case, it is possible to obtain a homogeneous, small powder focus spots, high stiffness of the powder flow, to ensure adequate action metal deposition process the metal powder and the focused laser beam, to improve the deposition efficiency and precision, effectively overcome the steep powder supply nozzle powder during processing due to gravity segregation phenomena occur, ensuring a uniform powder focused, improve the processing efficiency.
[0019] (2)本发明的环孔式激光同轴送粉喷嘴，采用模块化设计，具有不同a角规格的环孔锥头通过螺栓与喷嘴主体连接，使得不同规格环孔锥头端面与基板间的距离能够在一定范围内变化，从而获得不同大小的粉末汇聚焦斑。 [0019] (2) an annular ring coaxial type laser according to the present invention, the powder nozzle, modular design, an annular ring having a cone angle different from a size of the connection and the nozzle body by a bolt, such that the different specifications of the end face of the annular ring cone the distance between the substrates can vary within a certain range, thereby obtaining different focal spot size of the powder aggregation.
[0020] (3)本发明的环孔式激光同轴送粉喷嘴，连接套筒通过调节螺栓与锥状喷嘴主体连接，通过调节调节螺栓的长短可以调节粉末流焦点与激光束焦点间的离焦距离，同时可调节至两者重合。 [0020] (3) an annular ring coaxial type laser according to the present invention, the powder nozzle, connected through a connecting sleeve with a tapered nozzle body adjusting screw can be adjusted from the powder flow between the focal point of the laser beam focus by adjusting the length of the adjusting bolt focusing distance, while both may be adjusted to coincide.
[0021] (4)本发明的环孔式激光同轴送粉喷嘴，调节对中螺钉可调节连接套筒和激光头的位移，克服加工和安装过程中的同轴度的误差，实现激光束与粉末流同轴度的调整。 [0021] (4) an annular ring coaxial type laser according to the present invention, the powder nozzle, the adjustment of the adjustable screw displacement connector sleeve and the laser head, to overcome the coaxiality error processing and installation process, the laser beam to achieve adjust the concentricity and powder flow.
附图说明 BRIEF DESCRIPTION
[0022]图1是本发明的结构示意图。 [0022] FIG. 1 is a structural diagram of the present invention.
[0023]图2是本发明中锥状喷嘴主体的结构示意图。 [0023] FIG. 2 is a schematic view of a tapered nozzle body structure of the present invention.
[0024] 图3是图2的俯视图。 [0024] FIG. 3 is a plan view of FIG. 2.
[0025] 图中各标号表示： [0025] FIG respective reference numerals:
[0026] 1、锥状喷嘴主体;11、冷却水进口； 12、冷却水出口； 13、环形安装槽;21、连接套筒； 22、激光头;23、激光束;3、进粉通道;31、入口； 4、环孔锥头;41、环形粉末稳流槽;42、出粉小孔;5、中央水冷套;f51、环形凹槽;52、密封圈；6、保护气体通道;61、气体进口； 7、连接螺栓； 8、调节螺栓;9、调节套筒;91、对中螺钉。 [0026] 1, a tapered nozzle body; 11, cooling water inlet; 12, a cooling water outlet; 13, an annular mounting groove; 21, connected to the sleeve; 22, laser head; 23, the laser beam; 3, into the powder passage; 31, inlet; 4, an annular ring cone; 41, annular groove steady flow powder; 42, apertures flour; 5, the central water cooling jacket; F51, the annular groove; 52, seals; 6, shielding gas passage; 61 gas inlet; 7, connecting bolts; 8, an adjusting bolt; 9, adjusting sleeve; 91, centering screws. ' '、' '' '
具体实施方式 detailed description
[0027]以下结合说明书附图和具体实施例对本发明作进一步详细说明。 [0027] The following description in conjunction with the accompanying drawings and specific embodiments of the present invention is described in further detail.
[0028]图1至图3示出了本发明环孔式激光同轴送粉喷嘴的一种实施例，该环孔式激光同轴送粉喷嘴，包括中空的锥状喷嘴主体1，锥状喷嘴主体1的大径端设有可与激光头22连接的连接套筒21，锥状喷嘴主体1上设有四个周向均匀布置的进粉通道3,进粉通道3的入口31 设于锥状喷嘴主体1的大径端，进粉通道3的出口设于锥状喷嘴主体丨的小径端，锥状喷嘴主体1的小径端设有一中空的环孔锥头4,环孔锥头4大径端的端面上设有环形粉末稳流槽41， 环形粉末稳流槽41与进粉通道3连通，环孔锥头4小径端的端面上设有多个周向均匀分布的出粉小孔42，出粉小孔42与环形粉末稳流槽41连通，各出粉小孔42的粉末流汇集于一点。 [0028] Figures 1 to 3 illustrate an annular ring coaxial type laser according to the present invention, powder nozzle of the embodiments, the annular ring laser coaxial powder nozzle, a tapered nozzle body 1 comprises a hollow, tapered the large-diameter end of the nozzle body 1 is provided with a connecting sleeve 22 may be connected to the laser head 21, a tapered nozzle body is provided with four circumferentially uniformly arranged into the powder passage 3, the inlet channel 3 into the powder 31 is disposed on a a tapered small-diameter end of the large diameter end of the nozzle body 1, the powder inlet passage 3 provided in the outlet cone of the nozzle body Shu, the small-diameter end of a tapered nozzle body 1 is provided with a tapered annular ring hollow head 4, the ring hole cone 4 an annular groove powder steady flow of large-diameter end face of the end 41, the annular groove 41 and the steady flow of powder into the powder passage 3 communicating an end face of the small-diameter end of the annular ring 4 nose cone is provided with a plurality of circumferentially evenly distributed apertures 42 powder , a pink powder with the annular orifice 42 communicates steady flow grooves 41, each of the powder collection aperture 42 in the powder flow point. 锥状喷嘴主体1的上端为大径端，连接套筒M、锥状喷嘴主体丨和环孔锥头4的内孔形成激光束通道;粉末经由进粉通道3，到达环形粉末稳流槽41，粉末在环形粉末稳流槽41内聚集后，再通过多个出粉小孔42喷出，激光束23穿过激光束通道与出粉小孔42喷出的汇聚粉末流耦合，对加工件（图中未示出）进行加工、溶覆、修复和再制造等。 A tapered upper end of the nozzle body large-diameter end, connecting sleeve M, and a tapered annular ring nozzle body Shu cone holes 4 are formed within the laser beam passage; powder via powder feed passage 3 to an annular groove 41 swirl the powder , the powder aggregate within the annular powder steady flow channel 41, and then ejected through a plurality of apertures the powder 42, the laser beam 23 passes through the laser beam and the converging flow passage coupled pink powder discharged orifice 42 of the workpiece ( FIG not shown) for processing, solution coating, repair and remanufacturing. 本实施例的送粉喷嘴，粉末到达环形粉末稳流槽41后，通过多个环形阵列出粉小孔似，使得送粉喷嘴能够在大角度倾斜情况下，获得均匀、小聚焦粉斑、高挺度的粉末流，保证金属沉积过程中金属粉末与聚焦激光的充分作用，提高沉积效率和精度，有效地克服了送粉喷嘴在大倾角加工时由于重力作用而出现的粉末偏聚现象，确保粉末聚焦的均匀性，提高了加工效率。 Powder feed nozzles according to the present embodiment, the annular powder powder after reaching steady flow channel 41, the annular array of a plurality of through holes like a powder, such powder feeding nozzle can be tilted in the case of a large angle, to obtain a homogeneous, small powder focus spots, high stiffness of the powder flow, to ensure that metal deposition process of the metal powder and the full effect of focusing the laser beam, to improve the deposition efficiency and precision, effectively overcome the pink powder feed nozzles at high angle processing due to gravity occurs segregation phenomena, to ensure focusing uniformity powder, improve the processing efficiency.
[0029] 本实施例中，环孔锥头4通过连接螺栓7与锥状喷嘴主体1的小径端可拆卸的连接， 即采用螺栓连接，方便更换不同规格的环孔锥头4。 [0029] In this embodiment, annular ring cone 4 by bolts 7 tapered diameter end of the nozzle body 1 is detachably connected, i.e., with bolts, to facilitate the replacement of different specifications annular ring cone 4. 环孔锥头4下端（小径端)端部设计为沿激光束23方向直径变大的锥体结构，能够提高激光束23能量的利用率和粉末的利用率。 4 the lower end (small diameter end) of the end portion of the annular ring design of cone 23 along the direction of the diameter of the laser beam becomes large pyramidal configuration can improve the utilization efficiency of energy of the laser beam 23 and the powder. [0030]本实施例中，环形粉末稳流槽41的宽度与进粉通道3的直径相等，环形粉末稳流槽41的深度大于出粉小孔42孔深的二分之一，有利于进粉通道3内的粉末能够畅通的进入环形粉末稳流槽41并聚集，确保出粉小孔42喷出的粉末准直和高挺度。 [0030] In this embodiment, the diameter is equal to the groove width of the annular powder steady flow passage 41 and into the powder 3, powdered depth of the annular groove 41 is greater than the steady flow of powder out of the hole 42 hole depth one-half, into favor 3 the powder in the powder flow channel can flow into the annular groove 41 and the steady powder aggregates to ensure a high stiffness and a collimating aperture 42 discharged pink powder.
[0031]出粉小孔42的直径为D，数量为N个，其中，0.8mm彡D彡1.5mm，10彡N彡30;出粉小孔42的中心线与锥状喷嘴主体1轴线的夹角a，l〇°$a彡30°;本实施例中出粉小孔42的直径D为0.8mm，出粉小孔犯抛光处理，能够获得直径为2-4mm的粉末汇聚点，出粉小孔42的数量为24个，出粉小孔42的中心线与锥状喷嘴主体1轴线的夹角a为20°。 [0031] The diameter of the aperture 42 for the powder D, a number N, where, 0.8mm San D San 1.5mm, 10 San San 30 N; flour orifice centerline axis 42 and a tapered nozzle body the angle a, San l〇 ° $ a 30 °; embodiment flour orifice diameter D 42 of the present embodiment is 0.8mm, the holes made polishing powder, the powder can be obtained having a diameter of 2-4mm convergence point of the the number of apertures 42 for powder 24, the powder 42 and the center line of a hole axis of the nozzle body cone angle a is 20 °.
[0032] 本实施例中，锥状喷嘴主体1的内孔内设有中央水冷套5,中央水冷套5外表面设有多个相互连通的环形凹槽51，锥状喷嘴主体1上分别设有冷却水进口11和冷却水出口12,冷却水进口11和冷却水出口12均与环形凹槽51连通，冷却水在环形凹槽51形成冷却通道，对锥状喷嘴主体1的壳体进行散热，中央水冷套5外表面与锥状喷嘴主体1的内孔的侧壁之间设有密封圈52，保证水冷结构密封可靠。 [0032] In this embodiment, the tapered inner bore of the nozzle body 1 is provided with a central water jacket 5, the outer surface of the central water cooling jacket 5 is provided with a plurality of interconnected annular groove 51, a tapered nozzle are respectively disposed on the body a cooling water inlet 11 and a cooling water outlet 12, cooling water inlet 11 and a cooling water outlet 12 are in communication with the annular groove 51, annular groove 51 in the coolant cooling channels of the housing 1 is tapered nozzle body heat , the outer surface of the central water cooling jacket 5 and the tapered ring 52 is provided between the nozzle body bore side wall 1, to ensure reliable sealing water cooling structure.
[0033] 本实施例中，锥状喷嘴主体1上还设有四个周向均匀布置的保护气体通道6,保护气体通道6与进粉通道3交错布置，保护气体通道6与锥状喷嘴主体1的内孔连通，保护气体通道6的气体进口61设置在锥状喷嘴主体1的大径端，气体进口61与进粉通道3的入口31布置如图3所示，保护气体通过四路保护气体通道6，进入锥状喷嘴主体1的内腔，对激光透镜和沉积层起到保护作用。 [0033] In this embodiment, the tapered nozzle body 1 is also provided with four circumferentially uniformly arranged shielding gas passage 6, the protective gas into the powder passage channel 6 and 3 are staggered, the tapered nozzle body 6 and the protective gas channel a communication hole, the protective gas passage gas inlet 616 is disposed at the large-diameter end of a tapered nozzle body 1, the gas inlet 31 is disposed in FIG. 61 and into powder inlet passage 3 shown in FIG. 3, four protected by protective gas gas channel 6, into the tapered lumen of the nozzle body 1, has protective effects on the laser lens and the deposited layer.
[0034] 本实施例中，连接套筒21通过调节螺栓8与锥状喷嘴主体1连接，通过调节调节螺栓8的长短可以调节粉末流焦点与激光束23焦点间的离焦距离，同时可调节至两者重合。 [0034] In this embodiment, the connecting sleeve 21 is connected to the nozzle body 1 by adjusting the taper bolt 8, the powder flow can be adjusted by adjusting the focal point of the laser beam 8 adjust the length of the bolt defocus distance, while the focus can be adjusted between 23 to the two coincide.
[0035] 本实施例中，锥状喷嘴主体1大径端的端面上设有一环形安装槽13,连接套筒21外表面套设有一调节套筒9,调节套筒9与环形安装槽13螺纹连接，调节套筒9伸出环形安装槽13的外表面上设有四个均匀分布的对中螺钉91，调节对中螺钉91可调节连接套筒21和激光头22的位移，实现激光束23与粉末流同轴度的调整，克服加工和安装过程中的误差。 [0035] In this embodiment, the end surface of the large diameter end of a tapered nozzle body is provided with an annular mounting groove 13, the outer surface of the connecting sleeve 21 is provided with a sleeve adjusting sleeve 9, 9 connected to the adjustment sleeve 13 threaded annular mounting groove adjusting sleeve 9 is provided on the outer surface of the projecting annular mounting groove 13 of four evenly distributed on the screw 91, the screw 91 for adjusting the adjustable displacement of the coupling sleeve 21 and the laser head 22, the laser beam 23 is achieved powder flow adjusting concentricity, to overcome errors during processing and installation.
[0036] 虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明。 [0036] While the present invention has been disclosed above by the preferred embodiments, but not intended to limit the present invention. 任何熟悉本领域的技术人员，在不脱离本发明技术方案范围的情况下，都可利用上述揭示的技术内容对本发明技术方案做出许多可能的变动和修饰，或修改为等同变化的等效实施例。 Any skilled in the art, without departing from the scope of the technical solutions of the present invention, using the disclosed techniques can be made of many possible variations content and modifications, or modifications of the aspect of the invention is equivalent variations equivalent embodiments example. 因此，凡是未脱离本发明技术方案的内容，依据本发明技术实质对以上实施例所做的任何简单修改、 等同变化及修饰，均应落在本发明技术方案保护的范围内。 Thus, all without departing from the technical solutions of the present invention, any simple modification based on the technical spirit of the present invention made of the above Example, equivalent variations and modifications shall fall within the scope of protection of the present invention.
| Cited Patent | Filing date | Publication date | Applicant | Title |
|---|---|---|---|---|
| CN2510502Y * | Oct 18, 2001 | Sep 11, 2002 | 北京有色金属研究总院 | Laser coating coaxial powder-delivery nozzle |
| CN101024881A * | Feb 17, 2007 | Aug 29, 2007 | 通用电气公司 | Nozzle for laser net shape manufacturing |
| US6396025 * | Aug 4, 1999 | May 28, 2002 | Aeromet Corporation | Powder feed nozzle for laser welding |
