A metal solid printing method with alternate outer wall surfacing and inner filling
A solid, metal technology, applied in the field of additive manufacturing, can solve problems such as workpiece hanging flow, and achieve the effect of ensuring continuity, avoiding hanging flow collapse, and avoiding interference
Inactive Publication Date: 2020-06-30
ZHEJIANG UNIV
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[0006] The present invention provides a metal entity printing method that alternately carries out external wall surfacing and internal filling, and solves the problem of hanging flow at some positions of the workpiece in traditional three-axis additive materials
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[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that the following embodiments are intended to facilitate the understanding of the present invention, but do not limit it in any way.
[0033] Such as figure 1 As shown, a metal solid printing method that alternates outer wall surfacing and inner filling includes the following steps:
[0034] Step 1, obtain the STL model of the workpiece to be processed, such as figure 2 As shown, the layer height of the additive process is set to 2.0mm, the additive speed of the surfacing welding is 0.011m / s, the wire feeding speed is 5.0m / min, and the welding bead spacing is 4.0mm.
[0035] The printing material selected in this embodiment is ER5356 stainless steel welding wire with a diameter of 1.2 mm. The protective gas is a mixture of 2% oxygen and 98% argon. The protective airflow was set at 20L / min.
[0036] Step 2, slice the whole ...
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Abstract
The invention discloses a metal entity printing method for alternately performing outer wall surfacing and inner filling, and belongs to the technical field of additive manufacturing. The invention avoids the problem of hanging flow collapse when printing some inclined positions vertically by performing variable attitude printing on the area where the workpiece is prone to hanging flow, and ensures the stability of the forming; at the same time, the non-hanging flow area of the outer wall and the interior of the entity are still Using traditional three-axis additive materials instead of variable attitude machining can better avoid interference and reduce the complexity of path planning. In order to avoid interference between the welding torch and the printed outer wall hanging flow area when the workpiece is printing other areas to be printed, a strategy of printing the outer wall hanging flow area and other areas alternately every 8mm is adopted to ensure the sustainability of the surfacing process. The printing method of the present invention solves the problem of hanging flow at some positions of the workpiece in traditional three-axis additive materials.
Description
technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a metal entity printing method for alternately performing external wall surfacing and internal filling. Background technique [0002] Additive manufacturing technology, commonly known as 3D printing, is a digital manufacturing technology that finally obtains the desired workpiece by adding and accumulating materials layer by layer. In recent years, with the rapid development of metal additive manufacturing technology, many metal parts that are difficult or expensive to process through traditional methods can be quickly realized through metal additive manufacturing technology. At present, metal additive manufacturing technology has been applied in many fields. Among them, arc additive manufacturing has many advantages, such as high deposition rate, short manufacturing cycle, high wire utilization rate, and low cost. In addition, the formed parts have h...
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IPC IPC(8): B22F3/105B33Y10/00B33Y50/02
CPCB33Y10/00B33Y50/02B22F10/00B22F10/32B22F10/22B22F10/25B22F10/36B22F10/366B22F10/322Y02P10/25
Inventor 沈洪垚刘冰邓荣新唐胜李顺
Owner ZHEJIANG UNIV