阅读说明：本技术 一种金属结构件的成形方法 (Forming method of metal structural part ) 是由 程四华 吕迺冰 晁月林 孙齐松 徐士新 佟倩 周洁 陈涛 穆相林 王晓晨 张勇 于 2019-09-05 设计创作，主要内容包括：本发明实施例提供了一种金属结构件的成形方法,包括：以金属结构件上待焊接部位的任意一点为起焊点,利用CMT及铁基焊线,基于第一焊接参数进行第一层焊带的焊接；将距离上一层焊带一侧5～6mm处作为第一当前层焊带的起焊点,进行所述第一当前层焊带的焊接；第一当前层包括：第二层焊带、第三层焊带、第四层焊带及第五层焊带；将距离上一层焊带一侧3～4mm处作为第二当前层焊带的起焊点,进行所述第二当前层焊带的焊接；第二当前层包括：第六层焊带、第七层焊带、第八层焊带、第九层焊带及第十层焊带；将距离上一层焊带一侧2～3mm处作为第三当前层焊带的起焊点,进行所述第三当前层焊带的焊接；第三当前层包括：第十一层焊带与待焊接部位顶端之间的各层焊带。(The embodiment of the invention provides a forming method of a metal structural part, which comprises the following steps: taking any point of a part to be welded on the metal structural member as a starting welding point, and welding a first layer of welding strip by using CMT and an iron-based welding wire based on first welding parameters; taking a position 5-6 mm away from one side of the previous layer of welding strip as a starting welding point of the first current layer of welding strip, and welding the first current layer of welding strip; the first current layer includes: a second layer of welding strip, a third layer of welding strip, a fourth layer of welding strip and a fifth layer of welding strip; taking a position 3-4 mm away from one side of the previous layer of welding strip as a starting welding point of a second current layer of welding strip, and welding the second current layer of welding strip; the second current layer includes: a sixth layer of welding strip, a seventh layer of welding strip, an eighth layer of welding strip, a ninth layer of welding strip and a tenth layer of welding strip; taking a position 2-3 mm away from one side of the previous layer of welding strip as a starting welding point of a third current layer of welding strip, and welding the third current layer of welding strip; the third current layer includes: and the solder strips of the eleventh layer and the top ends of the parts to be welded.)

1. A method of forming a metallic structural member, the method comprising:

taking any point of a part to be welded on the metal structural member as a starting welding point, and welding a first layer of welding strip by using a cold metal transition welding gun CMT and an iron-based welding wire based on first welding parameters;

taking a position 5-6 mm away from one side of a welding strip on the upper layer of the first current layer as a starting welding point of the welding strip on the first current layer, and welding the welding strip on the first current layer based on the first welding parameters; the first current layer includes: the second layer welds area, third layer and welds area, fourth layer and weld area and fifth layer, first welding parameter includes: the welding speed is 0.10-0.12 m/min, the wire feeding speed is 3-4 m/min, the welding voltage is 12-13V, and the welding current is 125-135A;

taking a position 3-4 mm away from one side of a welding strip on the upper layer of the second current layer as a starting welding point of the welding strip on the second current layer, and welding the welding strip on the second current layer based on the second welding parameters; the second current layer includes: a sixth layer of welding strip, a seventh layer of welding strip, an eighth layer of welding strip, a ninth layer of welding strip and a tenth layer of welding strip; the second welding parameters include: the welding speed is 0.20-0.25 m/min, the wire feeding speed is 6-7 m/min, the welding voltage is 20-22V, and the welding current is 150-160A;

taking a position 2-3 mm away from one side of a welding strip on the upper layer of the third current layer as a starting welding point of the welding strip on the third current layer, and welding the welding strip on the third current layer based on the third welding parameters; the third current layer includes: the welding strips of the eleventh layer and the welding strips of the top ends of the parts to be welded; the third welding parameter includes: the welding speed is 0.15-0.20 m/min, the wire feeding speed is 4-5 m/min, the welding voltage is 18-20V, and the welding current is 145-155A.

2. The method of claim 1, wherein the thickness of each layer of solder strip in the first layer solder strip to the fifth layer solder strip is 4 to 5mm, and the width of each layer solder strip is 8 to 10 mm.

3. The method of claim 1, wherein the thickness of each layer of solder strip in the sixth layer of solder strip through the tenth layer of solder strip is 3-4 mm, and the width of each layer of solder strip is 8-10 mm.

4. The method of claim 1, wherein a welding direction of the second layer of solder strip, the third layer of solder strip, the fourth layer of solder strip, and the fifth layer of solder strip is consistent with a welding direction of the first layer of solder strip.

5. The method of claim 1, wherein a welding direction of the seventh layer of solder strip, the eighth layer of solder strip, the ninth layer of solder strip, and the tenth layer of solder strip is consistent with a welding direction of the sixth layer of solder strip.

6. The method according to claim 1, wherein in each layer of the solder ribbon between the eleventh layer of the solder ribbon and the tip of the portion to be soldered, the thickness of each layer of the solder ribbon is 2 to 3mm, and the width of each layer of the solder ribbon is 8 to 10 mm.

7. A method according to claim 1, characterized in that the layers of solder strip between the eleventh layer of solder strip and the top of the location to be soldered are soldered in a manner which corresponds to the soldering direction of the eleventh layer of solder strip.

8. The method of claim 1, wherein the iron-based weld line comprises the following chemical components in percentage by weight:

c: 0.40 to 0.50%, Si: 0.80-0.90%, Mn: 0.45-0.55%, Cr: 4.60-4.80%, Mo: 1.00-1.30%, V: 0.70-0.90%, p is less than or equal to 0.030%, S is less than or equal to 0.030%, and the balance is Fe and impurities.

9. The method according to claim 1, wherein the angle of the metal structure is 30-45 ° and the height is less than 100 mm.

Technical Field

The invention belongs to the technical field of welding, and particularly relates to a forming method of a metal structural part.

Background

In the field of metal 3D printing, printing of metal structural members is generally achieved by a printing method of CMT arc welding or a printing method of laser powder laying.

However, conventional printing methods can have severe stress concentrations when printing sharp (that can be understood as acute) structural locations. Excessive internal stress can lead to cracking of the metal parts, and finally, the service performance of the technical structural part is seriously reduced.

Disclosure of Invention

Aiming at the problems in the prior art, the embodiment of the invention provides a forming method and a forming device for a metal structural part, which are used for solving the technical problems that when an acute-angle metal structural part is formed in the prior art, severe stress concentration exists at a sharp structural position, and a metal part is cracked due to excessive internal stress, so that the service performance of the metal structural part is reduced.

The embodiment of the invention provides a forming method of a metal structural part, which comprises the following steps:

taking any point of a part to be welded on the metal structural member as a starting welding point, and welding a first layer of welding strip by using a cold metal transition welding gun CMT and an iron-based welding wire based on first welding parameters;

taking a position 5-6 mm away from one side of a welding strip on the upper layer of the first current layer as a starting welding point of the welding strip on the first current layer, and welding the welding strip on the first current layer based on the first welding parameters; the first current layer includes: the second layer welds area, third layer and welds area, fourth layer and weld area and fifth layer, first welding parameter includes: the welding speed is 0.10-0.12 m/min, the wire feeding speed is 3-4 m/min, the welding voltage is 12-13V, and the welding current is 125-135A;

taking a position 3-4 mm away from one side of a welding strip on the upper layer of the second current layer as a starting welding point of the welding strip on the second current layer, and welding the welding strip on the second current layer based on the second welding parameters; the second current layer includes: a sixth layer of welding strip, a seventh layer of welding strip, an eighth layer of welding strip, a ninth layer of welding strip and a tenth layer of welding strip; the second welding parameters include: the welding speed is 0.20-0.25 m/min, the wire feeding speed is 6-7 m/min, the welding voltage is 20-22V, and the welding current is 150-160A;

taking a position 2-3 mm away from one side of a welding strip on the upper layer of the third current layer as a starting welding point of the welding strip on the third current layer, and welding the welding strip on the third current layer based on the third welding parameters; the third current layer includes: the welding strips of the eleventh layer and the welding strips of the top ends of the parts to be welded; the third welding parameter includes: the welding speed is 0.15-0.20 m/min, the wire feeding speed is 4-5 m/min, the welding voltage is 18-20V, and the welding current is 145-155A.

In the scheme, the thickness of each layer of welding strip is 4-5 mm and the width of each layer of welding strip is 8-10 mm from the first layer of welding strip to the fifth layer of welding strip.

In the scheme, the thickness of each layer of welding strip from the sixth layer of welding strip to the tenth layer of welding strip is 3-4 mm, and the width of each layer of welding strip is 8-10 mm.

In the above scheme, the welding direction of the second layer welding strip, the third layer welding strip, the fourth layer welding strip and the fifth layer welding strip is consistent with the welding direction of the first layer welding strip.

In the above scheme, the welding direction of the seventh layer welding strip, the eighth layer welding strip, the ninth layer welding strip and the tenth layer welding strip is consistent with the welding direction of the sixth layer welding strip.

In the scheme, in each layer of welding strip between the eleventh layer of welding strip and the top end of the part to be welded, the thickness of each layer of welding strip is 2-3 mm, and the width of each layer of welding strip is 8-10 mm.

In the above scheme, the welding mode of each layer of welding strip between the eleventh layer of welding strip and the top end of the part to be welded is kept consistent with the welding direction of the eleventh layer of welding strip.

In the scheme, the iron-based bonding wire comprises the following chemical components in percentage by weight:

c: 0.40 to 0.50%, Si: 0.80-0.90%, Mn: 0.45-0.55%, Cr: 4.60-4.80%, Mo: 1.00-1.30%, V: 0.70-0.90%, p is less than or equal to 0.030%, S is less than or equal to 0.030%, and the balance is Fe and impurities.

In the scheme, the angle of the metal structural part is 30-45 degrees, and the height of the metal structural part is less than 100 mm.

The embodiment of the invention provides a forming method of a metal structural part, which comprises the following steps: taking any point of a part to be welded on the metal structural member as a starting welding point, and welding a first layer of welding strip by using a cold metal transition welding gun CMT and the iron-based welding wire based on first welding parameters; taking a position 5-6 mm away from one side of a welding strip on the upper layer of the first current layer as a starting welding point of the welding strip on the first current layer, and welding the welding strip on the first current layer based on the first welding parameters; the first current layer includes: the second layer welds area, third layer and welds area, fourth layer and weld area and fifth layer, first welding parameter includes: the welding speed is 0.10-0.12 m/min, the wire feeding speed is 3-4 m/min, the welding voltage is 12-13V, and the welding current is 125-135A; taking a position 3-4 mm away from one side of a welding strip on the upper layer of the second current layer as a starting welding point of the welding strip on the second current layer, and welding the welding strip on the second current layer based on the second welding parameters; the second current layer includes: a sixth layer of welding strip, a seventh layer of welding strip, an eighth layer of welding strip, a ninth layer of welding strip and a tenth layer of welding strip; the second welding parameters include: the welding speed is 0.20-0.25 m/min, the wire feeding speed is 6-7 m/min, the welding voltage is 20-22V, and the welding current is 150-160A; taking a position 2-3 mm away from one side of a welding strip on the upper layer of the third current layer as a starting welding point of the welding strip on the third current layer, and welding the welding strip on the third current layer based on the third welding parameters; the third current layer includes: the welding strips of the eleventh layer and the welding strips of the top ends of the parts to be welded; the third welding parameter includes: the welding speed is 0.15-0.20 m/min, the wire feeding speed is 4-5 m/min, the welding voltage is 18-20V, and the welding current is 145-155A; therefore, by reasonably setting the welding parameters of each layer of welding strip, when the acute angle of the metal structural member is printed, the former five layers adopt a slow accumulation mode, the accumulation process of the sixth to tenth layers is faster, and the plurality of layers after the eleventh layer recover to a normal accumulation mode; meanwhile, the welding point of each layer of welding strip is staggered with the previous layer of welding strip, the staggered stacking among the layers is equivalent to the stress dispersion on each layer of welding strip, and the internal stress at the acute angle structure can be uniformly dispersed by adopting the printing mode, so that the internal stress is prevented from being concentrated at one position, the cracking of the metal structural member is avoided, and the service performance of the metal structural member is ensured.

Drawings

Fig. 1 is a schematic flow chart of a forming method of a metal structural member according to an embodiment of the present invention.

Detailed Description

In order to solve the technical problems that when an acute-angle metal structural part is formed in the prior art, severe stress concentration exists at a sharp structural position, and the metal part is cracked due to excessive internal stress, so that the service performance of the metal structural part is reduced, the invention provides a forming method of the metal structural part, which comprises the following steps: taking any point of a part to be welded on the metal structural member as a starting welding point, and welding a first layer of welding strip by using a cold metal transition welding gun CMT and the iron-based welding wire based on first welding parameters; taking a position 5-6 mm away from one side of a welding strip on the upper layer of the first current layer as a starting welding point of the welding strip on the first current layer, and welding the welding strip on the first current layer based on the first welding parameters; the first current layer includes: the second layer welds area, third layer and welds area, fourth layer and weld area and fifth layer, first welding parameter includes: the welding speed is 0.10-0.12 m/min, the wire feeding speed is 3-4 m/min, the welding voltage is 12-13V, and the welding current is 125-135A; taking a position 3-4 mm away from one side of a welding strip on the upper layer of the second current layer as a starting welding point of the welding strip on the second current layer, and welding the welding strip on the second current layer based on the second welding parameters; the second current layer includes: a sixth layer of welding strip, a seventh layer of welding strip, an eighth layer of welding strip, a ninth layer of welding strip and a tenth layer of welding strip; the second welding parameters include: the welding speed is 0.20-0.25 m/min, the wire feeding speed is 6-7 m/min, the welding voltage is 20-22V, and the welding current is 150-160A; taking a position 2-3 mm away from one side of a welding strip on the upper layer of the third current layer as a starting welding point of the welding strip on the third current layer, and welding the welding strip on the third current layer based on the third welding parameters; the third current layer includes: the welding strips of the eleventh layer and the welding strips of the top ends of the parts to be welded; the third welding parameter includes: the welding speed is 0.15-0.20 m/min, the wire feeding speed is 4-5 m/min, the welding voltage is 18-20V, and the welding current is 145-155A.

The technical solution of the present invention is further described in detail by the accompanying drawings and the specific embodiments.