Spring wire feeding pipe and welding machining device

Abstract

The invention discloses a spring wire feeding pipe and a welding processing device.The spring wire feeding pipe comprises a plurality of variable-diameter spring wire feeding pipe sections, the variable-diameter spring wire feeding pipe sections are formed by spirally winding spring wires, and inner holes allowing welding wires to pass through are formed in the middles of the variable-diameter spring wire feeding pipe sections; each variable-diameter spring wire feeding pipe section is provided with a first end and a second end which are oppositely arranged in the extending direction of the inner hole, the inner diameter of each variable-diameter spring wire feeding pipe section is gradually reduced from the first end to the second end, and the variable-diameter spring wire feeding pipe sections are sequentially connected. The first end of one variable-diameter spring wire feeding pipe section is connected with the first end of the other variable-diameter spring wire feeding pipe section, and the second end of one variable-diameter spring wire feeding pipe section is connected with the second end of the other variable-diameter spring wire feeding pipe section. The friction resistance can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of laser welding, and more specifically, to a spring wire feeding tube and a welding processing device. Background Art

[0002] The wire feeding system is the core part of laser welding, responsible for delivering the welding wire to the welding position. The wire feeding system usually includes wire feeding mechanism, wire feeding hose, welding wire and other components, and the components cooperate with each other to complete the automatic wire feeding process.

[0003] The wire feeding hose is a pipe that feeds the welding wire into the welding area. Through the wire feeding hose, the welding wire can be stably fed to the welding area to avoid wire breakage, wire jamming, etc., thereby ensuring the quality and strength of the weld.

[0004] The spring wire feeding tube is a type of wire feeding hose. It is generally made of steel wire wound into a straight spring tube with constant inner and outer diameters. The inner hole should be well matched with the welding wire to provide uniform and stable wire feeding conditions. However, in actual applications, the welding wire and the inner wall of the spring will cause friction and wear, resulting in large wire feeding resistance, short effective wire feeding distance (≤3000mm), short service life, and incompatibility with aluminum welding wire. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned defects of the prior art and provide a spring wire feeding tube and a welding processing device, which can reduce friction resistance, increase wire feeding length and service life, and be compatible with aluminum welding wire by improving the structure of the spring wire feeding tube.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] A spring wire feeding tube, characterized in that it comprises multiple sections of variable diameter spring wire feeding tube sections, the variable diameter spring wire feeding tube sections are formed by spirally winding spring wires, the middle of the variable diameter spring wire feeding tube section has an inner hole for the welding wire to pass through, the variable diameter spring wire feeding tube section has a first end and a second end arranged oppositely along the extension direction of the inner hole, the inner diameter of the variable diameter spring wire feeding tube section gradually decreases from the first end to the second end, each of the variable diameter spring wire feeding tube sections is connected in sequence, the first end of one variable diameter spring wire feeding tube section is connected to the first end of another variable diameter spring wire feeding tube section, and the second end of one variable diameter spring wire feeding tube section is connected to the second end of another variable diameter spring wire feeding tube section.

[0008] Preferably, the length of the variable diameter spring wire feeding tube section is 1.0 mm to 20 mm.

[0009] Preferably, the inclination angle of the inner hole side wall of the variable diameter spring wire feeding tube segment relative to the central axis thereof is 0.5° to 10°.

[0010] Preferably, the inner diameter of the variable diameter spring wire feeding tube section is 0.5 mm to 5.0 mm.

[0011] Preferably, the material of the spring wire is stainless steel, carbon steel, graphite, Teflon, nylon or glass fiber; and the cross-section of the spring wire is circular or elliptical.

[0012] Preferably, the cross section of the spring wire is circular, and the outer diameter of the variable diameter spring wire feeding tube section is 2 mm to 10 mm.

[0013] Preferably, the diameter of the spring wire is 0.5 mm to 5 mm.

[0014] Preferably, it also includes multiple sections of equal-diameter spring wire feeding tube segments, wherein the equal-diameter spring wire feeding tube segments are arranged between two adjacent second ends, the first end of one of the variable-diameter spring wire feeding tube segments is connected to the first end of another of the variable-diameter spring wire feeding tube segments through one of the equal-diameter spring wire feeding tube segments, and the second end of one of the variable-diameter spring wire feeding tube segments is connected to the second end of another of the variable-diameter spring wire feeding tube segments through another of the equal-diameter spring wire feeding tube segments.

[0015] Preferably, the length of the equal-diameter spring wire feeding tube segment is 1.0 mm to 20 mm.

[0016] The invention also discloses a welding processing device, comprising the spring wire feeding tube mentioned above.

[0017] Implementing the embodiments of the present invention will have the following beneficial effects:

[0018] The embodiment of the present invention arranges multiple sections of variable diameter spring wire feeding tube sections with gradually decreasing inner diameters, so that the first end (larger inner diameter end) of a variable diameter spring wire feeding tube section is connected to the first end (larger inner diameter end) of another variable diameter spring wire feeding tube section, and the second end (smaller inner diameter end) of one variable diameter spring wire feeding tube section is connected to the second end (smaller inner diameter end) of another variable diameter spring wire feeding tube section, so that the overall inner diameter changes in a periodic wave-like manner, which can reduce the contact area between the inner diameter and the welding wire, thereby effectively reducing the wire feeding resistance, increasing the effective wire feeding distance, and being compatible with aluminum welding wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] in:

[0021] Figure 1It is a schematic diagram of the overall structure of a spring wire feeding tube according to a specific embodiment of the present invention.

[0022] Figure 2 yes Figure 1 A magnified view of the local structure of part A.

[0023] Figure 3 It is an enlarged view of the local structure of a spring wire feeding tube according to another specific embodiment of the present invention.

[0024] Figure 4 It is an enlarged view of the local structure of another specific embodiment of the present invention.

[0025] Figure 5 It is a schematic structural diagram of the spring wire feeding tube of comparative example 2.

[0026] Figure 6 It is an enlarged view of the local structure of a spring wire feeding tube according to another specific embodiment of the present invention.

[0027] Figure 7 It is an enlarged view of the local structure of a spring wire feeding tube according to another specific embodiment of the present invention.

[0028] Figure 8 It is an enlarged view of the local structure of a spring wire feeding tube according to another specific embodiment of the present invention.

[0029] Fig. 9 It is an enlarged view of the local structure of a spring wire feeding tube according to another specific embodiment of the present invention.

[0030] In the figure, 10, variable diameter spring wire feeding tube section; 11, spring wire; 12, inner hole; 13, first end; 14, second end; 20, equal diameter spring wire feeding tube section. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] refer to Figure 1 and Figure 2The present invention discloses a spring wire feeding tube, comprising a plurality of sections of variable diameter spring wire feeding tube sections 10, wherein the variable diameter spring wire feeding tube sections 10 are formed by spirally winding a spring wire 11, wherein an inner hole 12 for passing the welding wire is provided in the middle of the variable diameter spring wire feeding tube section 10, wherein the variable diameter spring wire feeding tube section 10 has a first end 13 and a second end 14 which are arranged opposite to each other along an extension direction of the inner hole 12, wherein the inner diameter of the variable diameter spring wire feeding tube section 10 gradually decreases from the first end 13 to the second end 14, and wherein the variable diameter spring wire feeding tube sections 10 are connected in sequence, wherein the first end 13 of one variable diameter spring wire feeding tube section 10 is connected to the first end 13 of another variable diameter spring wire feeding tube section 10, and the second end 14 of one variable diameter spring wire feeding tube section 10 is connected to the second end 14 of another variable diameter spring wire feeding tube section 10.

[0033] The above-mentioned embodiment arranges multiple sections of variable diameter spring wire feeding tube segments 10 with gradually decreasing inner diameters, so that the first end 13 (larger inner diameter end) of a variable diameter spring wire feeding tube segment 10 is connected to the first end 13 (larger inner diameter end) of another variable diameter spring wire feeding tube segment 10, and the second end 14 (smaller inner diameter end) of a variable diameter spring wire feeding tube segment 10 is connected to the second end 14 (smaller inner diameter end) of another variable diameter spring wire feeding tube segment 10, so that the overall inner diameter changes in a periodic wave-like manner, which can reduce the contact area between the inner diameter and the welding wire, thereby effectively reducing the wire feeding resistance, increasing the effective wire feeding distance, and being compatible with aluminum welding wire.

[0034] In a specific embodiment, the length L1 of the variable diameter spring wire feeding tube segment 10 is 1.0 mm to 20 mm, preferably 7.2 mm to 9.6 mm, and specifically, can be 4.8 mm, 6 mm, 7.2 mm, 8.4 mm, 9.6 mm, 10.8 mm, 12 mm, 13.2 mm, 14.4 mm, etc.

[0035] In a specific embodiment, the inclination angle α of the side wall of the inner hole 12 of the variable diameter spring wire feeding tube segment 10 relative to its central axis G can be 0.5°~10°, preferably 2°~5°, specifically, it can be 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, etc.

[0036] The lengths of the variable diameter spring wire feeding tube sections 10 may be the same or may be different.

[0037] The inner diameter of the variable diameter spring wire feeding tube section 10 can be 0.5mm-10mm, preferably 1.6mm-4.8mm, specifically, 2.0mm, 2.2mm, 2.4mm, 3.6mm, 4.8mm, etc., which is suitable for conveying welding wire with a diameter of 0.8mm-3.0mm.

[0038] The overall length of the spring wire feeding tube can be 0.5 mm to 10000 mm, the material of the spring wire 11 can be stainless steel, carbon steel, graphite, Teflon, nylon or glass fiber, etc., and the cross-section of the spring wire 11 can be circular or elliptical, etc.

[0039] In a specific embodiment, the cross section of the spring wire 11 is circular, the diameter R of the spring wire 11 is 0.8 mm to 1.5 mm, and the outer diameter of the variable diameter spring wire feeding tube section 10 can be 2.4 mm to 6.8 mm.

[0040] refer to Figure 3 In another embodiment, the spring wire feeding tube further comprises a plurality of equal-diameter spring wire feeding tube sections 20, the equal-diameter spring wire feeding tube sections 20 being arranged between two adjacent second ends 14, the first end of a variable-diameter spring wire feeding tube section 10 being connected to the first end of another variable-diameter spring wire feeding tube section 10 through an equal-diameter spring wire feeding tube section 20, and the second end of a variable-diameter spring wire feeding tube section 10 being connected to the second end of another variable-diameter spring wire feeding tube section 10 through another equal-diameter spring wire feeding tube section 20. By arranging the equal-diameter spring wire feeding tube sections 20, the smoothness of the hole wall of the inner hole 12 in contact with the welding wire can be improved, the friction force can be reduced, and the wire feeding resistance can be reduced.

[0041] Preferably, the length L2 of the equal-diameter spring wire feeding tube segment 20 can be 1.0 mm to 20 mm, preferably 2.4 mm to 12 mm, specifically, it can be 2.4 mm, 3.6 mm, 4.8 mm, 6 mm, 7.2 mm, 8.4 mm, 9.6 mm, 10.8 mm, 12 mm, etc.

[0042] refer to Figure 3 In this specific embodiment, the length L2 of the equal-diameter spring wire feeding tube segment 20 is 2 pitches long, 2.4 mm, and the length L1 of the variable-diameter spring wire feeding tube segment 10 is 3 pitches long, 3.6 mm. In this specific embodiment, L1 is equal to L3. In other embodiments, L1 may not be equal to L3.

[0043] refer to Figure 4 In another embodiment, the cross-section of the spring wire of the spring wire feeding tube is elliptical, and the major diameter direction of the ellipse is along the axial direction of the spring wire feeding tube, including a variable diameter spring wire feeding tube segment 10, a constant diameter spring wire feeding tube segment 20 and another variable diameter spring wire feeding tube segment 30. The elliptical spring wire can further reduce friction resistance.

[0044] The following are specific embodiments.

[0045] Example 1

[0046] Example 1 The structure of the spring wire feeding tube is as follows Figure 6As shown, it is formed by spirally winding a steel wire with a diameter of 1.2±0.02mm, and the minimum period unit includes a variable diameter spring wire feeding tube segment 10, a constant diameter spring wire feeding tube segment 20 and another variable diameter spring wire feeding tube segment 10. The length L1 of the variable diameter spring wire feeding tube segment 10 is 2.4mm, 2 pitches long; the length L2 of the constant diameter spring wire feeding tube segment 20 is 1.2mm, 1 pitch long; the length L3 of the other variable diameter spring wire feeding tube segment 10 is 2.4mm, 2 pitches long. The outer diameter of the first end 13 (larger inner diameter end) of the variable diameter spring wire feeding tube segment 10 is 4.95±0.1mm, and the outer diameter of the second end 14 (smaller inner diameter end) is 4.6±0.1mm. The inclination angle of the side wall of the inner hole 12 of the variable diameter spring wire feeding tube segment 10 relative to its central axis is 4.8°. The overall length of the spring wire feeding tube is 4200±50mm. The wire feeding resistance when it is straightened and coiled 1 circle is measured, and the results are shown in Table 1.

[0047] Example 2

[0048] Example 2 The structure of the spring wire feeding tube is as follows Figure 7 As shown, it is spirally wound with a steel wire of 1.2±0.02mm in diameter, and the minimum period unit includes multiple sections of variable diameter spring wire feeding tube segments 10. The lengths L1 and L3 of the two variable diameter spring wire feeding tube segments 10 are both 2.4mm, 2 pitches long, and the inclination angle of the side wall of the inner hole 12 of the variable diameter spring wire feeding tube segment 10 relative to its central axis is 4.8°. The overall length of the spring wire feeding tube is 4200±50mm. The wire feeding resistance when it is straightened and coiled 1 circle is measured, and the results are shown in Table 1.

[0049] Example 3

[0050] The spring wire feeding tube of Example 3 is formed by spirally winding a steel wire with a diameter of 1.2±0.02mm. The minimum period unit includes a plurality of sections of variable diameter spring wire feeding tube segments 10. The length L1 of each variable diameter spring wire feeding tube segment 10 is 3.6mm, 3 pitches long, the inclination angle of the side wall of the inner hole 12 of the variable diameter spring wire feeding tube segment 10 relative to its central axis is 3°, and the overall length of the spring wire feeding tube is 4200±50mm. The wire feeding resistance when it is straightened and coiled 1 circle is measured, and the results are shown in Table 1.

[0051] Example 4

[0052] Example 4 The structure of the spring wire feeding tube is as follows Figure 8As shown, it is spirally wound by a steel wire with a diameter of 1.2±0.02mm. The minimum period unit includes a variable diameter spring wire feeding tube segment 10, an equal diameter spring wire feeding tube segment 20 and a variable diameter spring wire feeding tube segment 10. The length L1 of the variable diameter spring wire feeding tube segment 10 is 3.6mm, 3 pitches long, the length L2 of the equal diameter spring wire feeding tube segment 20 is 2.4mm, 2 pitches long, the length L3 of the variable diameter spring wire feeding tube segment 10 is 3.6mm, 3 pitches long, the inclination angle of the side wall of the inner hole 12 of the variable diameter spring wire feeding tube segment 10 relative to its central axis is 3°, and the overall length of the spring wire feeding tube is 4200±50mm. The wire feeding resistance when it is straightened and coiled 1 circle is measured, and the results are shown in Table 1.

[0053] Example 5

[0054] Example 5 The structure of the spring wire feeding tube is as follows Figure 2 As shown, it is spirally wound with a steel wire of 1.2±0.02mm in diameter, and the minimum period unit includes multiple sections of variable diameter spring wire feeding tube segments 10. The lengths L1 and L3 of the variable diameter spring wire feeding tube segments 10 are both 6mm, 5 pitches long, and the inclination angle of the side wall of the inner hole 12 of the variable diameter spring wire feeding tube segment 10 relative to its central axis is 2°. The overall length of the spring wire feeding tube is 4200±50mm. The wire feeding resistance when it is straightened and coiled for 1 turn is measured, and the results are shown in Table 1.

[0055] Example 6

[0056] The structure of the spring wire feeding tube of Example 6 is as follows Fig. 9 As shown, it is spirally wound by a steel wire with a diameter of 1.2±0.02mm. The minimum period unit includes a variable diameter spring wire feeding tube segment 10, an equal diameter spring wire feeding tube segment 20 and a variable diameter spring wire feeding tube segment 10. The length L1 of the variable diameter spring wire feeding tube segment 10 is 6mm, 5 pitches long, the length L2 of the equal diameter spring wire feeding tube segment 20 is 2.4mm, 2 pitches long, the length L3 of the variable diameter spring wire feeding tube segment 10 is 6mm, 5 pitches long, the inclination angle of the side wall of the inner hole 12 of the variable diameter spring wire feeding tube segment 10 relative to its central axis is 2°, and the overall length of the spring wire feeding tube is 4200±50mm. The wire feeding resistance when it is straightened and coiled 1 circle is measured, and the results are shown in Table 1.

[0057] Comparative Example 1

[0058] A straight spring wire feeding tube is taken as comparative example 1. The straight spring wire feeding tube is spirally wound by a steel wire with a diameter of 1.2±0.02 mm, an outer diameter of 4.6±0.1 mm, and an overall length of 4200±50 mm. The wire feeding resistance when it is straightened and coiled for one turn is measured, and the results are shown in Table 1.

[0059] Comparative Example 2

[0060] by Figure 5The spring wire feeding tube shown is comparative example 2, which is a spring wire feeding tube in the prior art. The cross-section of its spring wire 11 is elliptical. The inner diameter and the overall length of the spring wire feeding tube are the same as those of comparative document 1, which are equal diameters. The spring wire feeding tube of comparative example 2 reduces friction resistance by using an elliptical spring wire 11. The results are shown in Table 1.

[0061] Table 1: Comparison of wire feeding resistance of various embodiments and comparative examples

[0062]

[0063] From Table 1, it can be seen that: 1) Comparing Examples 1 to 6 of the present invention with Comparative Example 1, it can be seen that the wire feeding resistance of the spring wire feeding tubes of Examples 1 to 6 of the present invention, whether straightened or coiled in one circle, is significantly lower than that of Comparative Example 1. Comparing Examples 1 to 6 of the present invention with Comparative Example 2, it can be seen that the wire feeding resistance of the spring wire feeding tubes of Examples 1 to 6, whether straightened or coiled in one circle, is significantly lower than that of Comparative Example 2, which shows that the variable diameter structure of the present invention can significantly reduce the wire feeding resistance.

[0064] 2) Comparing Example 1 with Example 2, Example 3 with Example 4, and Example 5 with Example 6, it can be seen that when the spring wire feeding tube is Figure 3 When the structure shown is used, that is, when the minimum period unit of the spring wire feeding tube includes a variable diameter spring wire feeding tube section and a constant diameter spring wire feeding tube section, the wire feeding resistance when coiled one circle is lower. Usually, the spring wire feeding tube is in a bent state when used. It can be seen that the spring wire feeding tube including the variable diameter spring wire feeding tube section and the constant diameter spring wire feeding tube section will have a lower wire feeding resistance when used.

[0065] The present invention also discloses a welding processing device, comprising the above-mentioned spring wire feeding tube. The welding processing device can be a processing device that requires a spring wire feeding tube, such as a welding laser, an arc welding processing device, etc.

[0066] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A spring wire feeding tube, characterized in that: It comprises a plurality of sections of variable diameter spring wire feeding tube sections, wherein the variable diameter spring wire feeding tube sections are formed by spirally winding spring wires, wherein the middle of the variable diameter spring wire feeding tube section has an inner hole for the welding wire to pass through, and the variable diameter spring wire feeding tube section has a first end and a second end which are arranged opposite to each other along the extension direction of the inner hole, and the inner diameter of the variable diameter spring wire feeding tube section gradually decreases from the first end to the second end, and each of the variable diameter spring wire feeding tube sections is connected in sequence, wherein the first end of one variable diameter spring wire feeding tube section is connected to the first end of another variable diameter spring wire feeding tube section, and the second end of one variable diameter spring wire feeding tube section is connected to the second end of another variable diameter spring wire feeding tube section.

2. The spring wire feed tube according to claim 1, characterized in that: The length of the variable diameter spring wire feeding tube section is 1.0 mm to 20 mm.

3. The spring wire feed tube according to claim 1, characterized in that: The inclination angle of the inner hole side wall of the variable diameter spring wire feeding tube section relative to the central axis thereof is 0.5° to 10°.

4. The spring wire feed tube according to claim 1, characterized in that: The inner diameter of the variable diameter spring wire feeding tube section is 0.5 mm to 5.0 mm.

5. The spring wire feed tube according to claim 1, characterized in that: The material of the spring wire is stainless steel, carbon steel, graphite, Teflon, nylon or glass fiber; The cross section of the spring wire is circular or elliptical.

6. The spring wire feed tube according to claim 1, characterized in that: The cross section of the spring wire is circular, and the outer diameter of the variable diameter spring wire feeding tube section is 2 mm to 10 mm.

7. The spring wire feed tube according to claim 1, characterized in that: The diameter of the spring wire is 0.5 mm to 5 mm.

8. The spring wire feed tube according to any one of claims 1 to 7, characterized in that: It also includes multiple sections of equal-diameter spring wire feeding tube segments, which are arranged between two adjacent second ends. The first end of one of the variable-diameter spring wire feeding tube segments is connected to the first end of another of the variable-diameter spring wire feeding tube segments through one of the equal-diameter spring wire feeding tube segments, and the second end of one of the variable-diameter spring wire feeding tube segments is connected to the second end of another of the variable-diameter spring wire feeding tube segments through another of the equal-diameter spring wire feeding tube segments.

9. The spring wire feed tube according to claim 8, characterized in that: The length of the equal-diameter spring wire feeding tube section is 1.0 mm to 20 mm.

10. A welding processing device, characterized in that: It comprises a spring wire feeding tube as described in any one of claims 1 to 9.

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