CN114472568A - Method for eliminating internal stress unevenness of aluminum alloy welding wire - Google Patents
Method for eliminating internal stress unevenness of aluminum alloy welding wire Download PDFInfo
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- CN114472568A CN114472568A CN202210117241.9A CN202210117241A CN114472568A CN 114472568 A CN114472568 A CN 114472568A CN 202210117241 A CN202210117241 A CN 202210117241A CN 114472568 A CN114472568 A CN 114472568A
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- 238000003466 welding Methods 0.000 title claims abstract description 148
- 238000000034 method Methods 0.000 title claims abstract description 36
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 25
- 238000005491 wire drawing Methods 0.000 claims abstract description 66
- 238000004804 winding Methods 0.000 claims abstract description 29
- 238000003825 pressing Methods 0.000 claims abstract description 23
- 238000005452 bending Methods 0.000 claims abstract description 14
- 230000009191 jumping Effects 0.000 claims abstract description 6
- 238000009826 distribution Methods 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 abstract description 5
- 230000035882 stress Effects 0.000 description 45
- 239000000956 alloy Substances 0.000 description 6
- 238000005242 forging Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000005489 elastic deformation Effects 0.000 description 5
- 230000032683 aging Effects 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 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
- 238000007723 die pressing method Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000000463 material Substances 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
- 229910000831 Steel Inorganic materials 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
- 230000008859 change Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000009467 reduction Effects 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
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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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 non-uniform internal stress of an aluminum alloy welding wire. The method comprises the steps of adjusting the relative included angle between a die box and a wire drawing winding drum, controlling the jumping of the wire drawing winding drum and adjusting the value of a wire rewinding machine. The stress of the left side and the right side of the welding wire is equal to that of the welding wire with the angle beta of between a connecting line of a welding wire contact point and a central point of a wire drawing drum and a connecting line of the welding wire contact point and an outlet point of a die box, and the warping distance range of the drawn welding wire is 5-10 mm; a V-shaped pressing wheel 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 pressing wheel, the influence of the drifting and shaking of the welding wire 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 kept, and therefore the influence of bending plastic deformation on the loose diameter of the welding wire is reduced; the loose diameter of the welding wire is adjusted by controlling the tension of the wire rewinding machine.
Description
Technical Field
The invention relates to the technical field of welding wire processing, in particular to a method for eliminating non-uniform internal stress of an aluminum alloy welding wire.
Background
Because the aluminum alloy material, especially the aluminum alloy material for aviation, is very sensitive to temperature, the strength index is inevitably obviously reduced by improving the aging temperature, so that MgZn is ensured2When the strengthening phase is precipitated too much, the overaging phenomenon is generated. Therefore, the aging treatment after quenching is usually carried out at lower temperatures (less than 200 ℃ C. and 250 ℃ C.), thereby affecting the stress relief effect (only 10-35%).
The principle of the vibration residual stress eliminating method is that a portable powerful vibration exciter is used to enable a metal structure to generate one or more vibration states, so that elastic deformation is generated during mechanical loading, and after residual stress of certain parts in a part is superposed with vibration load, plastic strain is caused by exceeding yield stress of materials, so that reduction and redistribution of internal stress are caused. The existing 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% to the maximum extent; if the steel plate is placed for 360 hours after quenching and tested after vibration aging, the residual stress can be eliminated by 10-20 percent. The Vibration Stress Relief (VSR) technology has the characteristics of high efficiency, energy conservation, simple and convenient process, strong applicability and the like, has no shape and size limitation on parts, is particularly suitable for large-scale complex structural parts, and is a process method with development prospect. In addition, the aluminum alloy member after vibration aging has good dimensional stability, and is not easy to generate processing deformation in subsequent machining.
The principle of stress relief by a mechanical stretching method is that a certain amount of permanent stretching plastic deformation is applied to a quenched aluminum alloy material along the rolling direction, so that the stretching stress and the original quenching residual stress are superposed to generate plastic deformation, and the residual stress is relieved and released. However, the method is only suitable for parts with simple shapes, has higher requirement on the tissue uniformity of the aluminum alloy material before stretching, and is mainly used in aluminum processing factories.
The cold die pressing method is to eliminate residual stress in the aluminum alloy die forging with complicated shape by strictly controlled limited cold shaping in a special finishing die. In fact, the expression "die pressing" is not precise enough, because the main action mechanism is to make local materials of the aluminum alloy die forging part subject to the action of stretching or compressing. When the finishing die is pressed down, the finishing convex die is embedded into the draft angle of the end face and the edge (rib) strip of the aluminum alloy die forging, and the web part of the die forging is actually stretched. Therefore, the method adjusts the integral stress level of the part instead of eliminating the integral stress level, and releases the residual stress of some parts on the aluminum alloy die forging and simultaneously increases the residual stress of other parts. In addition, in view of the fact that the aluminum alloy die forging has large residual stress, cold work hardening, cracks and fracture can be caused by excessive die deformation; and too small deformation makes the stress relief effect poor, so the limitation of this method is that it is difficult to control the deformation amount of the pressing precisely in the actual operation.
The internal stress of the existing aluminum alloy welding wire is ubiquitous in the whole welding wire production and processing process, the change of stress and deformation is increased by each drawing and annealing of the welding wire, the stress is uneven, the warping distance and the diameter of the welding wire can be influenced, the quality problems of unsmooth wire feeding, unstable arc striking, wire blockage of the welding wire at a contact nozzle and the like in the welding wire feeding process are caused, the internal stress is required to be kept uniform so as to ensure that the welding wire can be stably fed and smoothly welded, and the welding wire reaches a straight state before a finished product layer is wound.
The drawing deformation process and the annealing process of the welding wire through rough drawing, middle drawing and fine drawing are actually a work hardening process. Since the work hardening distribution is not uniform, the degree of difficulty in deformation of each portion inside the metal is different, and the metal is deformed unevenly, resulting in residual stress. When the external force is removed, the welding wire is deformed unevenly due to the action of unevenly distributed residual stress. The greater the non-uniformity of such stresses and deformations, the more difficult it is to remove such stresses during subsequent winding, and when the residual stresses exceed the yield strength of the wire, the irregular twisting of the drawn wire will occur, resulting in undesirable wire sweep and wire diameter.
The existing production technical scheme is that the wire arrangement form used by domestic welding wire production enterprises when winding welding wires is as follows: (1) lead screw winding displacement; (2) arranging a cam line; (3) the main shaft is movable type (also called free flat cable). The former two forms are provided with the wire arranger, so that secondary deformation is easy to generate, and new stress can be generated when the welding wire which just eliminates the residual stress is scratched by the guide wheel of the wire arranger. This is the primary reason why the pitch and diameter of the finished wire is not ideal. The third wire arranging mode is wound from the left end of the welding wire disc to the right end in one wire arranging stroke, but the welding wire is required to be loose and the diameter of the welding wire is completely qualified, so that the wire arranging mode can be effectively implemented.
The reasons for the uneven distribution of stress machine deformation in the semi-finished welding wire, which are problems in the actual process of the existing welding wire production, are generally as follows: (1) the relative position of the wire drawing die and the wire drawing winding drum is as follows: if the inner hole of the wire drawing die is not round or the die is not placed correctly, the axis of the welding wire is not consistent with the axis of the die hole, when the welding wire deforms, the radial compression is not uniform, and the distribution of residual stress on the cross section of the welding wire is more complex. When the residual stress exceeds the yield strength of the wire, the drawn wire will have an irregular distortion, resulting in an undesirable stick-out and diameter of the wire. (2) Jumping of the wire drawing drum: radial run-out, axial float and clamp vibration of the wire drawing drum can cause the welding wire to drift and shake on the drum, so that the drawn welding wire is regularly wavy and bent. (3) Tension of a take-up machine: when the tension of 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 loose diameter of the welding wire is reduced.
Disclosure of Invention
The invention provides a method for eliminating the non-uniform internal stress of an aluminum alloy welding wire, which solves the technical problem and comprises the following steps:
s1, adjusting the relative included angle between the die box and the wire drawing winding drum
A wire distributing plate is additionally arranged on the side parts of the wire drawing winding drum and the die box, and the wire distributing plate rotates along a central point to finely adjust the angle, wherein the finely adjusted angle is 5-10 degrees; the welding wires are drawn after the angles are finely adjusted through the wire distribution plate, so that the wire distribution distance is changed; the method comprises the steps of eliminating an unstable state generated by axial displacement and extrusion of a welding wire along a wire drawing drum in the wire drawing process, adjusting the outlet angle of a wire drawing die box to be 180 degrees +/-10 degrees, enabling the stress on the left side and the right side of the welding wire to be equal to 90 degrees, enabling beta to be 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 enabling the warping distance range of the drawn welding wire to be 5-10 mm;
s2, controlling the jumping of the wire drawing drum
A V-shaped pressing wheel 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 pressing wheel, the influence of the drifting and shaking of the welding wire 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 kept, and therefore the influence of bending plastic deformation on the loose diameter of the welding wire is reduced;
s3, adjusting the value of the adjusting wire-rewinding machine
The loose diameter of the welding wire is adjusted by the tension of the wire rewinding machine.
The model of V type pinch roller is V623, opening angle 45. The V-shaped wheel is provided with an opening of 45 degrees, so that the welding wire is tangent to the contact surface of the pressing wheel when passing through the pressing wheel, the welding wire is uniformly stressed, and new stress is not generated due to the action of a pressing force when passing through the pressing wheel.
The tension range of the wire rewinding machine in the S3 is 14-25N. The inner diameter of an I-shaped wheel of the wire winding machine is smaller than 270mm, the welding wire can generate bending plastic deformation to cause the loose diameter of the welding wire to be reduced, when the diameter is larger than 25N, the wire winding machine still keeps the original rotating speed, the welding wire wheel moves to reach the top end of displacement and loses the buffer effect, and the welding wire is excessively tightened to cause fracture; when the torque value is lower than 14N, the pay-off machine still keeps the original rotating speed, the welding wire cannot be kept in a tight state, the welding wire wound on the take-up pulley is loosened and accumulated, the warping distance of the welding wire is increased, and the elastic deformation of the welding wire is influenced.
And in the step S1, for different batches of welding wires, the outlet angle of the wire drawing die box and the wire distributing plate are adjusted to rotate along the central point to finely adjust the angle, and then wire drawing production is carried out, wherein the V-shaped pressing wheel does not need to be adjusted in different batches of production.
The model of the mould box is M1026, and the model of the distribution box is F300-280.
The invention has the beneficial effects that:
1. the influence of bending plastic deformation on the loose diameter of the welding wire is reduced, the radial runout and axial float of the wire drawing drum and the vibration of a clamp are reduced, the welding wire can drift and shake on the drum, and the drawn welding wire is caused to generate regular wave bending.
2. The relative included angle between the wire drawing die and the wire drawing 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 torque range, and keeping the tension of the wire rewinding machine to enable the welding wire to only generate elastic deformation.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a side view of the structure of the present invention;
fig. 3 is a schematic view of the fine adjustment angle of the distribution board in fig. 2.
In the figure: the wire distribution device comprises a wire distribution plate 1, a wire drawing winding drum 2, a V-shaped pressing wheel 3, a die box 4 and a welding wire 5.
Detailed Description
A method for eliminating non-uniform internal stress of an aluminum alloy welding wire comprises the following steps:
s1, adjusting the relative included angle between the die box and the wire drawing winding drum
A wire distribution plate 1 is additionally arranged on the side parts of the wire drawing winding drum 2 and the die box 4, and the wire distribution plate 1 rotates along the central point to finely adjust the angle, wherein the finely adjusted angle is 5-10 degrees; the welding wires 5 are drawn after the angle is finely adjusted through the wire distributing plate 1, so that the wire distributing distance is changed; the method comprises the steps of eliminating an unstable state generated by axial displacement and extrusion of a welding wire along a wire drawing drum 2 in the wire drawing process, adjusting an outlet angle of a wire drawing die box 4 to be 180 degrees +/-10 degrees to ensure that beta is 90 degrees, the stress on the left side and the right side of a welding wire 5 is equal, 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 range of the drawn welding wire is 5-10 mm;
s2, controlling the jumping of the wire drawing drum
A V-shaped pressing wheel 3 is arranged between the wire drawing winding drum 2 and the die box 4, the contact position of the welding wire and the wire drawing winding drum 2 is changed through the V-shaped pressing wheel 3, the influence of the drifting and shaking of the welding wire 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 kept, and therefore the influence of bending plastic deformation on the loose diameter of the welding wire is reduced;
s3, adjusting the value of the adjusting wire-rewinding machine
The loose diameter of the welding wire is adjusted by controlling the tension of the wire rewinding machine.
The model of V type pinch roller is V623, opening angle 45. The V-shaped wheel is provided with an opening of 45 degrees, so that the welding wire is tangent to the contact surface of the pressing wheel when passing through the pressing wheel, the welding wire is uniformly stressed, and new stress is not generated due to the action of a pressing force when passing through the pressing wheel.
The tension range of the wire rewinding machine in the S3 is 14-25N. The inner diameter of an I-shaped wheel of the wire winding machine is smaller than 270mm, the welding wire can generate bending plastic deformation to cause the loose diameter of the welding wire to be reduced, when the diameter is larger than 25N, the wire winding machine still keeps the original rotating speed, the welding wire wheel moves to reach the top end of displacement and loses the buffer effect, and the welding wire is excessively tightened to cause fracture; when the torque value is lower than 14N, the pay-off machine still keeps the original rotating speed, the welding wire cannot be kept in a tight state, the welding wire wound on the take-up pulley is loosened and accumulated, the warping distance of the welding wire is increased, and the elastic deformation of the welding wire is influenced.
And in the step S1, for different batches of welding wires, the outlet angle of the wire drawing die box and the wire distributing plate are adjusted to rotate along the central point to finely adjust the angle, and then wire drawing production is carried out, wherein the V-shaped pressing wheel does not need to be adjusted in different batches of production.
Comparative example 1:
when the relative included angle beta is less 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 drawn welding wire is in a right-handed spring shape; when the relative included angle beta is larger 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 drawn welding wire is in a left-handed spring shape. The relative included angle beta not equal to 90 degrees is the main reason for the warping distance.
Radial run-out, axial float and clamp vibrations of the wire drawing drum can also cause the welding wire to drift and shake on the drum, resulting in regular wave bending of the drawn welding wire. The runout of the drum directly affects the wire slack diameter.
The wire rewinding machine also has an influence on the loose diameter of the welding wire, and 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, so that the loose diameter of the welding wire is reduced.
The embodiment is as follows:
s1, adjusting the relative included angle between the die box and the wire drawing winding drum
A wire distributing plate is additionally arranged between the wire drawing winding drum and the die box, and the wire distributing plate rotates along a central point to finely adjust the angle, wherein the finely adjusted angle is 5-10 degrees; the welding wires are drawn after the angles are finely adjusted through the wire distribution plate, so that the wire distribution distance is changed; the method comprises the steps of eliminating an unstable state generated by axial displacement and extrusion of a welding wire along a wire drawing drum in the wire drawing process, adjusting the outlet angle of a wire drawing die box to be 180 degrees +/-10 degrees to ensure that beta is 90 degrees, the stress on the left side and the right side of the welding wire is equal, 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 range of the drawn welding wire is 5-10 mm;
s2, controlling the jumping of the wire drawing drum
The V-shaped pressing wheel 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 pressing wheel, the influence of the drifting and shaking of the welding wire 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 kept, and therefore the influence of bending plastic deformation on the loose diameter of the welding wire is reduced; the type of the V-shaped pinch roller is V623, and the opening angle is 45 DEG
S3, adjusting the value of the adjusting wire-rewinding machine
Adjusting the loose diameter of the welding wire through the tension of a take-up machine; the tension range of the wire rewinding machine is 14-25N. In a linear welding wire drawing device, after an alloy welding wire is drawn, the welding wire is influenced by the vibration of a die, a welding wire take-up machine and a wire drawing drum, and the welding wire has an uneven internal stress state, so that the warping distance and the diameter of the welding wire are directly influenced, and the quality problem during welding is caused. Improving the comparison of the welding wire warping distance before and after improvement:
before improvement: 26. 21, 23, 6, 30, 20, 23, 28, 18, 25, etc.,
after the improvement: 5. 6, 7, 4, 5, 6, 7, 5, 6, etc.;
by analyzing the above measurement data: the warping distance of the welding wire is large and unstable before transformation, secondary deformation of the welding wire in drawing is reduced after transformation, the internal stress of the welding wire is uniform, and the relaxation diameter and the warping distance of the welding wire are in an ideal state. And adjusting the range of the machine to 14-25N according to the strength of the alloy welding wire. The corresponding torque is obtained, so that the welding wire only generates elastic deformation.
Claims (7)
1. A method for eliminating non-uniform internal stress of an aluminum alloy welding wire comprises the following steps:
s1, adjusting the relative included angle between the die box and the wire drawing winding drum
A wire distributing plate is additionally arranged on the side parts of the wire drawing winding drum and the die box, and the wire distributing plate rotates along a central point to finely adjust the angle, wherein the finely adjusted angle is 5-10 degrees; the welding wires are drawn after the angles are finely adjusted through the wire distribution plate, so that the wire distribution distance is changed; the method comprises the steps of eliminating an unstable state generated by axial displacement and extrusion of a welding wire along a wire drawing drum in the wire drawing process, adjusting the outlet angle of a wire drawing die box to be 180 degrees +/-10 degrees, enabling an outlet wire to be tangent to the lower edge of the drum, enabling the stress on the left side and the right side of the welding wire to be equal to 90 degrees, enabling beta to be 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 enabling the warping distance range of the drawn welding wire to be 5-10 mm;
s2, controlling the jumping of the wire drawing drum
And a V-shaped pressing wheel 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 pressing wheel.
2. The method for eliminating the internal stress nonuniformity of the aluminum alloy welding wire according to claim 1, which is characterized by further comprising the following steps of:
s3, adjusting the tension value of the wire-rewinding machine
The loose diameter of the welding wire is adjusted by controlling the tension adjustment of the wire rewinding machine, and the range of the loose diameter of the welding wire is 0.8mm-1.6 mm.
3. The method for eliminating the nonuniform stress in the aluminum alloy welding wire as recited in claim 1, wherein the type of the V-shaped pinch roller is V623, and the opening angle is 45 degrees.
4. The method for eliminating the nonuniform stress in the aluminum alloy welding wire according to the claim 2, wherein the tension of the wire rewinding machine in the S3 is in a range of 14-25N.
5. The method for eliminating the non-uniformity of the internal stress of the aluminum alloy welding wire according to claim 1, wherein the drawing production is performed after the outlet angle of the drawing die box and the fine adjustment angle of the wire distributing plate are adjusted along the central point in the step S1 for different batches of welding wires, and the V-shaped pressing wheel does not need to be adjusted in the different batches of production.
6. The method for eliminating the nonuniform stress in the aluminum alloy welding wire as recited in claim 1, wherein the die box is M1026 and the distribution plate is F300-280.
7. The method for eliminating the nonuniform stress in the aluminum alloy welding wire as recited in claim 1, wherein in the step S2, the contact position of the welding wire is changed by the V-shaped pinch roller, so as to reduce the influence of wire drifting and shaking on the outlet of the die box, keep the relative smoothness of the welding wire at the outlet of the wire drawing die box, and reduce the influence of bending plastic deformation on the loose diameter of the welding wire.
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