A metal additive manufacturing method for parts with large aspect ratio and deep holes

Abstract

The invention discloses a manufacturing method for metal additive materials of ultra-large draw ratio deep-hole type components. Firstly, a layer of metal is manufactured and deposited through the metal additive materials, a plane is formed through milling, finally, drilling is carried out to achieve the hole diameter, and the technology process of metal depositing, plane milling and drilling forming is formed. The manufacturing method is characterized in that in the process of manufacturing each layer of metal through the additive materials, deep hole machining is carried out, the deep-hole machining is changed into machining of shallow holes with the thickness of 1-3 mm, and therefore the problem that ultra-large draw ratio deep holes with the small diameter of 1 mm cannot be machined can be effectively solved; the technical problems that in the traditional deep hole machining, cutting heat dissipation is difficult and a cutter is prone to deviating are avoided; and the manufacturing cost is low, the component forming is good, and the technology process is simple and flexible. The method is suitable for machining and manufacturing of large thin-wall metal components with deep holes so as to overcome many defects in a traditional deep hole machining method.

Description

technical field

[0001] The invention belongs to the field of metal material processing, and more specifically relates to a metal additive manufacturing method for parts with super large aspect ratio and deep holes. Background technique

[0002] In mechanical manufacturing, holes with L / D>50 (L is the depth of the hole and D is the diameter of the hole) are called deep holes, and holes with L / D>100 are called ultra-deep holes. Deep hole parts play an important role in the manufacturing industry. Deep hole processing in parts is one of the difficulties in processing and manufacturing technology. Due to its large length-to-diameter ratio and the closed and semi-closed state during processing, the deep hole has the following difficulties in the processing process: difficult heat dissipation during cutting, poor rigidity of the process system, and easy deviation of the tool. At present, the deep hole drilling technology using external chip removal (such as gun drilling) i...

Examples

Embodiment

[0026] Example: such as image 3 and Figure 4 The conical thin-walled deep-hole part shown is made of low carbon steel. The vertical height of this part is 0.24m, the wall thickness is 3mm, the angle between the busbar and the central axis is 14°, the inner diameter of the bottom is 0.2m, and the inner diameter of the top is 0.32 m, the 30 deep holes to be processed are located in the center of the thin wall, with a diameter of 1mm and evenly distributed. Additive manufacturing method choose arc fuse additive manufacturing. The welding wire material is low-carbon steel welding wire with a diameter of 1mm, and the forming substrate is selected from low-carbon steel material, and the size of the substrate is 400×400×20 (length×width×height, the unit is mm). Its forming steps are as follows:

[0027] Step 1: Fix the substrate on the workbench, set the deposition path of each layer as a circle, and the radius of the circle increases as the number of deposition layers increases...

technical field

[0001] The invention belongs to the field of metal material processing, and more specifically relates to a metal additive manufacturing method for parts with super large aspect ratio and deep holes. Background technique

[0002] In mechanical manufacturing, holes with L / D>50 (L is the depth of the hole and D is the diameter of the hole) are called deep holes, and holes with L / D>100 are called ultra-deep holes. Deep hole parts play an important role in the manufacturing industry. Deep hole processing in parts is one of the difficulties in processing and manufacturing technology. Due to its large length-to-diameter ratio and the closed and semi-closed state during processing, the deep hole has the following difficulties in the processing process: difficult heat dissipation during cutting, poor rigidity of the process system, and easy deviation of the tool. At present, the deep hole drilling technology using external chip removal (such as gun drilling) i...

Examples

Embodiment

[0026] Example: such as image 3 and Figure 4 The conical thin-walled deep-hole part shown is made of low carbon steel. The vertical height of this part is 0.24m, the wall thickness is 3mm, the angle between the busbar and the central axis is 14°, the inner diameter of the bottom is 0.2m, and the inner diameter of the top is 0.32 m, the 30 deep holes to be processed are located in the center of the thin wall, with a diameter of 1mm and evenly distributed. Additive manufacturing method choose arc fuse additive manufacturing. The welding wire material is low-carbon steel welding wire with a diameter of 1mm, and the forming substrate is selected from low-carbon steel material, and the size of the substrate is 400×400×20 (length×width×height, the unit is mm). Its forming steps are as follows:

[0027] Step 1: Fix the substrate on the workbench, set the deposition path of each layer as a circle, and the radius of the circle increases as the number of deposition layers increases...

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