CN114472568B - Method for eliminating internal stress non-uniformity of aluminum alloy welding wire - Google Patents
Method for eliminating internal stress non-uniformity of aluminum alloy welding wire Download PDFInfo
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- CN114472568B CN114472568B CN202210117241.9A CN202210117241A CN114472568B CN 114472568 B CN114472568 B CN 114472568B CN 202210117241 A CN202210117241 A CN 202210117241A CN 114472568 B CN114472568 B CN 114472568B
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- 238000003466 welding Methods 0.000 title claims abstract description 141
- 238000000034 method Methods 0.000 title claims abstract description 25
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 20
- 238000005491 wire drawing Methods 0.000 claims abstract description 71
- 238000004804 winding Methods 0.000 claims abstract description 45
- 238000005452 bending Methods 0.000 claims abstract description 15
- 238000009826 distribution Methods 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 230000009191 jumping Effects 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims 2
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 6
- 230000035882 stress Effects 0.000 description 46
- 239000000956 alloy Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000005242 forging Methods 0.000 description 6
- 230000005489 elastic deformation Effects 0.000 description 5
- 230000032683 aging Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 238000005482 strain hardening Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910017706 MgZn Inorganic materials 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
- B21C1/12—Regulating or controlling speed of drawing drums, e.g. to influence tension; Drives; Stop or relief mechanisms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
- B21C1/14—Drums, e.g. capstans; Connection of grippers thereto; Grippers specially adapted for drawing machines or apparatus of the drum type; Couplings specially adapted for these drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/02—Winding-up or coiling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/26—Special arrangements with regard to simultaneous or subsequent treatment of the material
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Abstract
The invention relates to the technical field of welding wire processing, in particular to a method for eliminating internal stress non-uniformity of an aluminum alloy welding wire. Comprises the steps of adjusting the relative included angle between the die box and the wire drawing winding drum, controlling the jump of the wire drawing winding drum, and adjusting the value of the wire winding machine. The stresses on the left side and the right side of the welding wire with the angle of beta=90 degrees are equal, beta is the included angle between the connecting line of the welding wire contact point and the center point of the wire drawing drum and the connecting line of the welding wire contact point and the outlet point of the die box, and the warping distance of the drawn welding wire ranges from 5mm to 10mm; a V-shaped pinch roller is arranged between the wire drawing winding drum and the die box, the contact position of the welding wire and the wire drawing winding drum is changed through the V-shaped pinch roller, the influence of welding wire drifting and shaking on the outlet of the wire drawing die is reduced, the relative stability of the welding wire at the outlet of the wire drawing die box is maintained, and the influence of bending plastic deformation on the relaxation diameter of the welding wire is reduced; the tension of the wire winding machine is controlled to adjust the loose diameter of the welding wire.
Description
Technical Field
The invention relates to the technical field of welding wire processing, in particular to a method for eliminating internal stress non-uniformity of an aluminum alloy welding wire.
Background
Because the aluminum alloy material, especially the aviation aluminum alloy material, is very sensitive to temperature, the improvement of aging temperature inevitably and obviously reduces the strength index, so that the reinforced phases such as MgZn 2 and the like are excessively precipitated, and an overaging phenomenon is generated. Therefore, the post-quenching aging treatment is typically carried out at a relatively low temperature (less than 200-250 ℃) and thus affects the stress relief effect (only 10-35%).
The working principle of the vibration eliminating residual stress method is that a portable powerful vibration exciter is used to make the metal structure generate one or more vibration states, so that elastic deformation is generated like mechanical loading, after the residual stress at certain parts in the part is overlapped with the vibration load, the plastic strain is caused by exceeding the yield stress of the material, and the internal stress is reduced and redistributed. The prior related researches indicate that when the aluminum alloy is subjected to vibration elimination in an unstable state (within 0-2 hours) just after quenching, the effect is optimal, and the residual stress can be reduced by 50-70% at maximum; if the test is carried out after the quenching is carried out for 360 hours and vibration aging is carried out, the residual stress can only be eliminated by 10% -20%. The Vibration Stress Relief (VSR) technology has the characteristics of high efficiency, energy saving, simple and convenient process, strong applicability and the like, has no shape and size limitation on parts, is particularly suitable for large complex structural parts, and is a very promising technological method. In addition, the aluminum alloy component after vibration aging has good dimensional stability, and is not easy to generate processing deformation in subsequent mechanical processing.
The principle of eliminating stress by mechanical stretching method is to apply a certain amount of permanent stretching plastic deformation to the quenched aluminum alloy material along the rolling direction, so that the plastic deformation occurs after the tensile stress is overlapped with the original quenching residual stress, and the residual stress is relaxed and released. However, the method is only suitable for parts with simple shapes, has high requirement on the structure uniformity of the aluminum alloy material before stretching, and is mostly used in aluminum processing factories.
The cold die pressing method eliminates residual stress in the aluminum alloy die forging with complex shape through strictly controlled limited cold shaping in a special finishing die. In fact, the term "stamping" is not exact because its main mechanism is to subject the localized material of the aluminum alloy die forging to either "stretching" or "compression". When the finishing die is pressed down, the finishing male die is embedded into the draft angle of the end face and the edge (rib) of the aluminum alloy die forging, so that the web part of the die forging is effectively stretched. Thus, the method adjusts, rather than eliminates, the overall stress level of the part, which allows the residual stress at certain locations on the aluminum alloy die forging to be relieved while also allowing the residual stress at other locations to be increased. In addition, since the aluminum alloy die forging inherently has large residual stress, excessive die deformation can cause cold work hardening, cracking and fracture; however, too small deformation makes the stress relief effect poor, and therefore, this method has a limitation in that it is difficult to precisely control the molding deformation amount in practical operation.
The internal stress of the existing aluminum alloy welding wire is commonly existing in the whole welding wire production and processing process, the stress and deformation change are increased during each drawing and annealing of the welding wire, the stress is uneven, the formation of the warping distance and the diameter of the welding wire can be influenced, the quality problems of unsmooth wire feeding, unstable arc striking, wire blocking at a conducting nozzle and the like of the welding wire occur in the welding wire feeding process, the welding wire can be smoothly fed, the internal stress of the welding wire must be kept uniform during welding, and the welding wire is ensured to reach a straight state before the winding of a finished product layer.
The wire is actually a work hardening process through the drawing deformation process of rough drawing, medium drawing and finish drawing and the annealing process. The uneven work hardening distribution causes uneven deformation of the metal due to different degrees of difficulty in deformation of each part in the metal, and as a result, residual stress is generated. When the external force is eliminated, the welding wire is deformed unevenly due to the action of residual stress unevenly distributed. The greater the degree of non-uniformity of such stress and deformation, the more difficult it is to eliminate such stress during subsequent winding, and when the residual stress exceeds the yield strength of the wire, the wire after being drawn will experience irregular distortion, resulting in undesirable wire gauge and diameter.
The existing production technical scheme, the winding displacement form that domestic welding wire manufacturing enterprises used when winding the welding wire has: (1) lead screw winding displacement; (2) cam wire arrangement; and (3) a main shaft movable type flat cable (also called a free flat cable). Both the former two forms are provided with a wire arranging device, secondary deformation is easy to generate, and the welding wire with the residual stress just eliminated can generate new stress after being tampered by a guide wheel of the wire arranging device. This is the main reason for the non-ideal stick-slip and diameter of the finished wire. While the third wire form is wound from the left end of the wire reel to one wire travel at the right end, it requires that the wire slack diameter be fully acceptable for effective performance.
Which problems exist in the actual process of the existing welding wire production, and the reasons for the uneven distribution of the deformation of the internal stress machine of the semi-finished welding wire are generally as follows: (1) the relative position of the wire drawing die and the wire drawing winding drum: if the inner hole of the wire drawing die is out of round or the die is placed improperly, the axis of the welding wire is inconsistent with the axis of the die hole, and when the welding wire is deformed, the radial compression is uneven, so that the residual stress distribution on the cross section of the welding wire is more complex. When the residual stress exceeds the yield strength of the welding wire, the drawn welding wire can generate irregular distortion phenomenon, so that the warping distance and the diameter of the welding wire are not required. (2) jumping of the wire drawing reel: radial runout and axial play of the wire drawing winding drum and vibration of the clamp can cause the welding wire to drift and shake on the winding drum, so that the drawn welding wire generates regular wavy bending. (3) tension of the wire rewinding machine: when the tension of the torque motor is too large, the welding wire can generate bending plastic deformation under the influence of the too small inner diameter of the spool or other intermediate transition wheels, so that the loose diameter of the welding wire is reduced.
Disclosure of Invention
The invention provides a method for eliminating internal stress non-uniformity of an aluminum alloy welding wire, which solves the technical problem and comprises the following steps:
S1, adjusting a relative included angle between a die box and a wire drawing winding drum
A distribution board is additionally arranged on the side parts of the wire drawing winding drum and the die box, and rotates along the center point to finely adjust the angle by 5-10 degrees; the size of the wire separation distance is changed by wire drawing after the angle of the welding wire is finely adjusted through the wire distribution plate; eliminating an unstable state generated by axial displacement extrusion of a welding wire along a wire drawing drum in the wire drawing process, and adjusting an outlet angle of a wire drawing die box by 180 degrees+/-10 degrees to ensure that the stresses on the left side and the right side of the welding wire with the angle of beta=90 degrees are equal, wherein beta is an included angle between a connecting line of a welding wire contact point and a central point of the wire drawing drum and a connecting line of the welding wire contact point and an outlet point of the die box, and the warping distance of the drawn welding wire ranges from 5mm to 10mm;
s2, controlling the jumping of the wire drawing winding drum
A V-shaped pinch roller is arranged between the wire drawing winding drum and the die box, the contact position of the welding wire and the wire drawing winding drum is changed through the V-shaped pinch roller, the influence of welding wire drifting and shaking on the outlet of the wire drawing die is reduced, the relative stability of the welding wire at the outlet of the wire drawing die box is maintained, and the influence of bending plastic deformation on the relaxation diameter of the welding wire is reduced;
S3, adjusting the value of the wire rewinding machine
The loose diameter of the welding wire is adjusted by the tension of the wire winding machine.
The model of the V-shaped pinch roller is V623, and the opening angle is 45 degrees. The 45-degree opening of the V-shaped wheel is used for guaranteeing that when welding wires pass through the pinch roller, the welding wires are tangent to the contact surface of the pinch roller, the stress of the welding wires is uniform, and new stress is not generated due to the action of the pressing force when the welding wires pass through the pinch roller.
And (3) the tension range of the wire rewinding machine in the step S3 is 14-25N. When the inner diameter of the spool of the wire winding machine is smaller than 270mm, the welding wire can generate bending plastic deformation, so that the loose diameter of the welding wire is reduced, and when the diameter is larger than 25N, the wire paying-off machine still maintains the original rotating speed, the wire wheel moves to the top end of displacement to lose the buffer effect, and the welding wire is excessively tightened to cause fracture; when the moment value is lower than 14N, the original rotating speed of the paying-off machine is still maintained, the welding wire cannot be in a tight state, the welding wire wound on the take-up wheel is loosened and piled up, the warping distance of the welding wire is increased, and the elastic deformation of the welding wire is affected.
In the step S1, the wire drawing production is carried out by adjusting the outlet angle of the wire drawing die box and the fine adjustment angle of the wire distribution plate along the center point rotation, and the V-shaped pinch roller in the production of different batches is not required to be adjusted.
And the model box model M1026 and the line distribution board model F300-280.
The beneficial effects of the invention are as follows:
1. The influence of bending plastic deformation on the relaxation diameter of the welding wire is reduced, and radial runout, axial play and vibration of the clamp of the wire drawing winding drum can cause the welding wire to drift and shake on the winding drum, so that the drawn welding wire generates regular wave bending.
2. The relative included angle between the wire drawing die and the wire drawing winding drum is controlled to be 90 degrees, the stress on the left side and the right side of the welding wire is equal, and the warping distance of the drawn welding wire is in an ideal range.
3. And controlling the moment range, and keeping the tension of the wire winding machine to enable the welding wire to only generate elastic deformation.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a side view of the structure of the present invention;
Fig. 3 is a schematic diagram of a rotational fine adjustment angle of the distribution board of fig. 2.
In the figure: the wire distributing disc 1, the wire drawing winding drum 2, the V-shaped pinch roller 3, the die box 4 and the welding wire 5.
Detailed Description
A method for eliminating internal stress non-uniformity of an aluminum alloy welding wire comprises the following steps:
S1, adjusting a relative included angle between a die box and a wire drawing winding drum
A distribution board 1 is additionally arranged on the side parts of the wire drawing winding drum 2 and the die box 4, and the distribution board 1 rotates along a central point to finely adjust the angle by 5-10 degrees; the wire 5 is drawn to change the size of the wire separation distance after the angle of the wire 5 is finely adjusted through the wire distribution board 1; eliminating an unstable state generated by axial displacement extrusion of a welding wire along a wire drawing drum 2 in the wire drawing process, and adjusting an outlet angle of 180 degrees+/-10 degrees of a wire drawing die box 4 to ensure that the stress on the left side and the right side of a welding wire 5 is equal to that of beta=90 degrees, wherein beta is an included angle between a connecting line of a welding wire contact point and a central point of the wire drawing drum and a connecting line of the welding wire contact point and the die box outlet point, and the warping distance of the drawn welding wire ranges from 5mm to 10mm;
s2, controlling the jumping of the wire drawing winding drum
A V-shaped pinch roller 3 is arranged between the wire drawing drum 2 and the die box 4, the contact position of the welding wire and the wire drawing drum 2 is changed through the V-shaped pinch roller 3, the influence of welding wire drift and shaking on the outlet of the wire drawing die is reduced, the relative stability of the welding wire 5 at the outlet of the wire drawing die box 4 is maintained, and the influence of bending plastic deformation on the relaxation diameter of the welding wire is reduced;
S3, adjusting the value of the wire rewinding machine
The tension of the wire winding machine is controlled to adjust the loose diameter of the welding wire.
The model of the V-shaped pinch roller is V623, and the opening angle is 45 degrees. The 45-degree opening of the V-shaped wheel is used for guaranteeing that when welding wires pass through the pinch roller, the welding wires are tangent to the contact surface of the pinch roller, the stress of the welding wires is uniform, and new stress is not generated due to the action of the pressing force when the welding wires pass through the pinch roller.
And (3) the tension range of the wire rewinding machine in the step S3 is 14-25N. When the inner diameter of the spool of the wire winding machine is smaller than 270mm, the welding wire can generate bending plastic deformation, so that the loose diameter of the welding wire is reduced, and when the diameter is larger than 25N, the wire paying-off machine still maintains the original rotating speed, the wire wheel moves to the top end of displacement to lose the buffer effect, and the welding wire is excessively tightened to cause fracture; when the moment value is lower than 14N, the original rotating speed of the paying-off machine is still maintained, the welding wire cannot be in a tight state, the welding wire wound on the take-up wheel is loosened and piled up, the warping distance of the welding wire is increased, and the elastic deformation of the welding wire is affected.
In the step S1, the wire drawing production is carried out by adjusting the outlet angle of the wire drawing die box and the fine adjustment angle of the wire distribution plate along the center point rotation, and the V-shaped pinch roller in the production of different batches is not required to be adjusted.
Comparative example 1:
When the relative included angle beta is smaller than 90 degrees, the curvature radius r is reduced, the bending plastic deformation of the upper side of the welding wire is increased, and the pulled welding wire is in a right-handed spring shape; when the relative included angle beta is more than 90 degrees, the curvature radius r is reduced, the bending plastic deformation of the lower side of the welding wire is increased, and the pulled welding wire is in a left-handed spring shape. The relative angle beta not equal to 90 DEG is the main reason for generating the warp.
Radial runout and axial play of the wire drawing winding drum and vibration of the clamp can also cause the welding wire to drift and shake on the winding drum, so that the drawn welding wire generates regular wavy bending. The runout of the spool directly affects the wire slack diameter.
The wire rewinding machine also has an effect on the relaxation diameter of the welding wire, when the torque motor is too large, the welding wire can generate bending plastic deformation under the influence of too small inner diameter of the spool or other intermediate transition wheels, and the relaxation diameter of the welding wire is reduced.
Examples:
S1, adjusting a relative included angle between a die box and a wire drawing winding drum
A wire distributing disc is additionally arranged between the wire drawing winding drum and the die box, and rotates along the center point to finely adjust the angle by 5-10 degrees; the size of the wire separation distance is changed by wire drawing after the angle of the welding wire is finely adjusted through the wire distribution plate; eliminating an unstable state generated by axial displacement extrusion of a welding wire along a wire drawing drum in the wire drawing process, and adjusting an outlet angle of a wire drawing die box by 180 degrees+/-10 degrees to ensure that the stress on the left side and the right side of the welding wire is equal to beta=90 degrees, wherein beta is an included angle between a connecting line of a welding wire contact point and a central point of the wire drawing drum and a connecting line of the welding wire contact point and the outlet point of the die box, and the warping distance of the drawn welding wire ranges from 5mm to 10mm;
s2, controlling the jumping of the wire drawing winding drum
A V-shaped pinch roller is arranged between the wire-drawing die and the winding drum, the contact position of the welding wire and the wire-drawing winding drum is changed through the V-shaped pinch roller, the influence of welding wire drifting and shaking on the outlet of the wire-drawing die is reduced, the relative stability of the welding wire at the outlet of the wire-drawing die box is maintained, and the influence of bending plastic deformation on the relaxation diameter of the welding wire is reduced; the model of the V-shaped pinch roller is V623, and the opening angle is 45 DEG
S3, adjusting the value of the wire rewinding machine
The loose diameter of the welding wire is adjusted through the tension of the wire winding machine; the tension range of the wire rewinding machine is 14-25N. In the linear welding wire drawing equipment, the vibration of a die, a welding wire coiling machine and a wire drawing winding drum is affected after the alloy welding wire is drawn, the welding wire is in an uneven internal stress state, the welding wire warping distance and the diameter are directly affected, and the quality problem during welding is caused. Welding wire stick-up contrast before and after improvement:
before improvement: 26. 21, 23, 6, 30, 20, 23, 28, 18, 25, etc.,
After improvement: 5.6, 7, 4, 5, 6, 7, 5, 6, etc.;
By analyzing the above measurement data: before transformation, the warping distance of the welding wire is greatly unstable, after transformation, the secondary deformation of the welding wire in drawing is reduced, the internal stress of the welding wire is uniform, and the relaxation diameter and the warping distance of the welding wire are in ideal states. And adjusting the machine range to 14-25N according to the strength of the alloy welding wire. The adaptive moment is obtained, so that the welding wire only generates elastic deformation.
Claims (2)
1. A method for eliminating internal stress non-uniformity of an aluminum alloy welding wire comprises the following steps:
S1, adjusting a relative included angle between a die box and a wire drawing winding drum
A distribution board is additionally arranged on the side parts of the wire drawing winding drum and the die box, and rotates along the center point to finely adjust the angle by 5-10 degrees; the size of the wire separation distance is changed by wire drawing after the angle of the welding wire is finely adjusted through the wire distribution plate; eliminating an unstable state generated by axial displacement extrusion of a welding wire along a wire drawing drum in the wire drawing process, and then adjusting an outlet angle of a wire drawing die box by 180 degrees+/-10 degrees to ensure that an outgoing line is tangent to the lower edge of the drum, so that stresses on the left side and the right side of the welding wire with the angle of beta=90 degrees are equal, wherein beta is an included angle between a connecting line of a welding wire contact point and a central point of the wire drawing drum and a connecting line of the welding wire contact point and an outlet point of the die box, and the warping distance of the drawn welding wire ranges from 5 mm to 10mm;
s2, controlling the jumping of the wire drawing winding drum
A V-shaped pinch roller is arranged between the wire drawing winding drum and the die box, and the contact position of the welding wire and the wire drawing winding drum is changed through the V-shaped pinch roller; the influence of the drift and the shake of the welding wire on the outlet of the die box is reduced, and the relative stability of the welding wire on the outlet of the wire drawing die box is maintained, so that the influence of bending plastic deformation on the relaxation diameter of the welding wire is reduced;
s3, adjusting the tension value of the wire rewinding machine
The loose diameter of the welding wire is regulated by controlling the tension adjustment of the wire rewinding machine, and the range of the loose diameter of the welding wire is 0.8mm-1.6mm;
The model of the V-shaped pinch roller is V623, and the opening angle is 45 degrees;
and (3) the tension range of the wire rewinding machine in the step S3 is 14-25N.
2. The method for eliminating internal stress non-uniformity of an aluminum alloy welding wire according to claim 1, wherein in the step S1, for welding wires of different batches, the wire drawing production is performed by adjusting the outlet angle of a wire drawing die box and rotating a wire distribution plate along a center point by a fine adjustment angle, and the V-shaped pinch roller in the production of different batches is not required to be adjusted.
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