Method for producing and / or processing a continuous strip having a strip body made of metal
By using cover parts and efficient welding methods during the welding process, the problems of weld flatness and thickness deviations are solved, and the small width, high-quality welds and simplicity of the welding process is achieved.
Patent Information
- Application Number
- CN202380031155.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-04-08
- Filing Date
- 2023-04-06
- Publication Date
- 2024-12-10
AI Technical Summary
When closing the open metal strip into a continuous belt, the Marangori effect may lead to the formation of cuts in the weld, resulting in deviations in flatness and thickness of the weld area, affecting the welding quality.
By using covers to cover the welding gap and applying flux outside the covers to ensure that the flux does not directly contact the welding area, then remove the covers for welding, using efficient welding methods such as WIG or MIG welding for small width, high quality Welding seam.
The thickness and flatness deviation of the welds are significantly reduced, and the welds of small width and high quality are achieved, and the flux consumption and simplicity of the welding process are optimized.
Smart Images
Figure CN119110758A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a method for producing and / or processing a continuous strip having a strip body made of metal, wherein at least two sections of the strip body are connected to one another by welding.
[0002] Furthermore, the invention relates to a continuous strip having a strip body made of metal. Background Art
[0003] When closing an open metal strip to form a continuous strip, the free end sections of the metal strip can be welded to one another by means of a so-called transverse weld seam, which usually extends obliquely or transversely to the circumferential direction of the continuous strip. In order to ensure a continuous weld and a weld seam that runs from the outside of the continuous strip to the inside of the continuous strip, a flux is usually used.
[0004] A disadvantage when applying the flux directly to the welding gap is that notches may form in the weld seam due to the so-called Marangoni effect, whereby significant deviations in flatness and thickness may occur in the region of the weld seam compared to other regions of the continuous strip. Summary of the invention
[0005] The object of the present invention is to overcome the disadvantages of the prior art and to improve the quality of the weld seam.
[0006] This object is achieved according to the invention with a method of the type mentioned at the outset in that, before welding the at least two segments, in step i), a welding gap formed in the abutment region of the at least two segments is covered with a cover, wherein in a subsequent step ii), flux is applied at least to at least one region of the strip adjacent to the cover and not covered by the cover, wherein in a subsequent step iii), the cover is removed and in a step iv), the at least two segments are welded to one another along the welding gap.
[0007] The solution according to the invention allows the production of significantly improved weld seams, wherein thickness deviations and flatness deviations can be significantly reduced. Furthermore, weld seams with very small widths can be achieved.
[0008] Preferably, the cover can be a film, in particular a plastic film, preferably an adhesive tape or a plastic strip, wherein the film is preferably a transparent film with a transmittance between 20% and 99%. The high transmittance or good transparency of the cover significantly simplifies the precise arrangement of the cover on the welding gap.
[0009] A variant of the invention has proven to be particularly advantageous in which the cover has a width transversely to the longitudinal direction of the welding gap of between 2 mm and 150 mm. This variant of the invention allows optimized handling of the cover and at the same time low flux consumption, since preferably more flux is applied as the distance of the flux edge from the welding gap increases.
[0010] In order to achieve a small weld width at a large weld thickness, it has proven to be particularly advantageous if the flux applied in step ii) has a TiO content of 20% to 60% by weight. x and / or 0%-5% (by weight) Cr3O x This variant of the invention enables good continuous welding and small weld seam widths even when connecting very thick strip end sections.
[0011] Advantageously, the flux can be applied, for example, by spraying and / or brushing and / or rolling and / or printing. Since the cover prevents the flux from being applied directly to the welding gap, this variant of the invention makes it possible to achieve a particularly fast and simple application of the flux. Thus, for example, the flux can also be sprayed, brushed, etc. on the cover during application, wherein, after the cover is removed, the flux located on the cover is also removed and the flux remaining on the strip surface is spaced apart from the welding gap.
[0012] In order to achieve particularly narrow and deep weld seams of high quality, it has proven to be advantageous to use a WIG welding method, a WP welding method, a WSG welding method, a MIG welding method, a MAG welding method, an MSG welding method, a laser welding method or a plasma welding method in step iv).
[0013] In order to achieve a continuous belt with small flatness deviations and thickness deviations over its entire belt circumference and its entire belt width and with a high mechanical load capacity, it can be provided that the at least two sections form the free end areas of the belt body before being connected to each other, wherein the belt body is closed to form the continuous belt by connecting the two sections.
[0014] This object can also be achieved according to the invention with a continuous strip of the type mentioned at the outset in that the ratio of the thickness of at least one weld seam between at least two interconnected sections to the maximum width of the weld seam is greater than or equal to 1:4, in particular greater than or equal to 1:3, 1:2 or 2:3.
[0015] The at least one weld seam can be a weld seam extending transversely or obliquely to the circumferential direction of the continuous strip, wherein the strip is closed to form the continuous strip by the weld seam.
[0016] Furthermore, it can be provided that the strip has a first main surface and a second main surface, wherein the first main surface and the second main surface are connected to one another via side surfaces, wherein the thickness of the weld seam extends from the first main surface of the strip to the second main surface, wherein the weld seam is preferably an I-seam, a V-seam or a steep-sided seam.
[0017] Advantageously, the weld seam has a width of 2 mm-10 mm, in particular between 5 mm-10 mm, particularly preferably between 7 mm-8 mm.
[0018] The belt body preferably has a thickness of 0.8 mm to 4 mm.
[0019] Furthermore, the continuous belt may have a circumference of 2m-300m and a belt width of 1200mm-9000mm.
[0020] It is particularly preferred that the strip is made of steel having 12.0%-28.0% Cr, 3.5%-15.0% Ni, 0%-14% Cu, 0%-1% Ti, 0%-2% Si, 0%-2% Mn, 0%-6% Mo, 0%-2% N and a maximum of 0.01%-0.20% C.
[0021] In addition, the continuous belt can have 1000N / mm 2 -1800 N / mm 2 tensile strength. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to better understand the present invention, the present invention is explained in more detail with the help of the following drawings.
[0023] They are shown in a very simplified schematic diagram:
[0024] Figure 1 A perspective view showing a continuous belt;
[0025] Figure 2 Showing a solder gap with masking during flux application Figure 1 The abutment area of two free end sections of the belt body of the continuous belt;
[0026] Figure 3 Shown after flux application and cover removal Figure 2 The area in
[0027] Figure 4 Shown along Figure 1 The section along line IV-IV in
[0028] Figure 5 Shown along Figure 1 The section of line VV in . DETAILED DESCRIPTION
[0029] First of all, it should be noted that identical parts are provided with the same reference numerals or the same component names in the different described embodiments, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names in a meaningful manner. The positional specifications selected in the description, such as top, bottom, side, etc., also refer to the directly described and shown figures and these positional specifications are transferred to the new positions in a meaningful manner in the event of a change in position.
[0030] All descriptions of value ranges in this specification should be understood as including any and all partial ranges therein. For example, the description 1 to 10 should be understood as including all partial ranges starting from a lower limit of 1 and an upper limit of 10, that is, all partial ranges starting with a lower limit of 1 or greater and ending with an upper limit of 10 or less, for example 1 to 1.7 or 3.2 to 8.1 or 5.5 to 10.
[0031] The drawings will be described in detail below.
[0032] according to Figure 1 , the continuous strip 1 according to the invention has a strip body 2 made of metal. The continuous strip 1 can have a circumference of 2m-300m and a strip width of 1200mm-9000mm. It is particularly preferred that the strip body 2 is made of steel having 12.0%-28.0% Cr, 3.5%-15.0% Ni, 0%-14% Cu, 0%-1% Ti, 0%-2% Si, 0%-2% Mn, 0%-6% Mo, 0%-2% N and a maximum of 0.01%-0.20% C.
[0033] Furthermore, the continuous belt 1 may have a strength of 1000 N / mm 2 -1800 N / mm 2 tensile strength.
[0034] To produce the continuous strip 1, as in Figure 2 and 3 As shown in the figure, at least two sections 3, 4 of the strip 2 are connected to each other by welding. The sections 3, 4 can form the free end regions of the strip 2 before they are connected to each other. By connecting the two sections 3, 4, the strip can be closed to form the continuous strip 1. However, it is also possible that the continuous strip 1 is separated into open strips, for example within the scope of maintenance or repair of the continuous strip 1, and then closed again by welding the sections 3, 4. One of the sections 3, 4 can also be inserted as a spare part into an opening previously processed in the strip 2 within the scope of processing the continuous strip 1. Thus, for example, when repairing the strip, a damaged part of the strip 2 can be cut off and replaced with an undamaged sheet metal part.
[0035] Before welding the segments 3, 4, the welding gap 5 formed in the abutment region of the at least two segments 3, 4 is covered in step i) with a cover 6. The cover 6 can completely cover the welding gap 5 over its entire length and width. The cover 6 can be a film, in particular a plastic film, preferably an adhesive tape or a plastic strip. Preferably, the cover 6 is a transparent film with a transmittance between 20% and 99%. The transparency of the cover 6 facilitates the precise orientation of the cover 6 along the welding gap 5. It has proven to be particularly advantageous with regard to the optimization of the handling and the requirements of the flux 8 if the cover 6 has a width between 2 mm and 150 mm transversely to the longitudinal direction of the welding gap 5.
[0036] In step ii), a flux 8 is applied to at least one region 7 of the strip 2 which is adjacent to the cover 6 and is not covered by the cover 6, wherein it has proven to be particularly advantageous with regard to continuous welding and achieving very good weld seam quality if the flux 8 applied in step ii) has a TiO content of 20% to 60% by weight. x and / or 0%-5% (by weight) Cr3O x .
[0037] As in Figure 2 As shown in , the flux 8 can be applied to the surface of the strip 2 on both longitudinal sides of the cover 6, as viewed in the longitudinal direction of the cover 6. Here, the flux 8 is applied to the surface of the strip 2 in the area 7 located on the left or right side of the cover 6, as viewed in the longitudinal direction of the cover 6. Even as in Figure 2 As shown in FIG. , it has proven to be particularly advantageous to apply the solder 8 in two regions 7 lying laterally adjacent to the cover 6 , but it is also sufficient to apply the solder 8 only in the region 7 lying to the left or to the right of the cover 6 .
[0038] The flux 8 can be applied, for example, by spraying and / or brushing and / or rolling and / or printing. Since the weld seam 5 is protected by the cover 6, the flux 8 can also be in direct contact with the cover 6 during application.
[0039] In the subsequent step iii) the cover 6 is removed. Figure 3 , it can be seen that after the cover 6 has been removed, no flux 8 is present in the region of the welding gap 5. The flux 8 is present only in the region 7 adjacent to the region previously covered by the cover 6. If the cover 6 has very straight longitudinal edges, a very straight course of the front end of the flux 8 at the edge of the flux 8 facing the welding gap 5 can also be achieved.
[0040] After the cover 6 has been removed, the two sections 3, 4 are welded to one another along the welding gap 5 in step iv) by means of a welding device 9. It has proven to be particularly advantageous to use a WIG welding method, a WP welding method, a WSG welding method, a MIG welding method, a MAG welding method, an MSG welding method, a laser welding method or a plasma welding method in step iv).
[0041] according to Figure 1 The weld seam 10 produced by the method according to the invention can be a weld seam extending transversely or obliquely to the circumferential direction of the continuous strip 1 , wherein the strip 2 can be closed to form the continuous strip 1 by the weld seam.
[0042] As from Figure 4 As can be seen in FIG. 1 , the weld seam 10 has a ratio of thickness d to maximum width b of greater than or equal to 1:4, in particular greater than or equal to 1:3, 1:2 or 2:3. The maximum width b of the weld seam 10 can be 2 mm-10 mm, in particular between 5 mm-10 mm, particularly preferably between 7 mm-8 mm. The strip 2 can have a thickness of, for example, 0.8 mm-4 mm. In addition, the strip 2 has a first main surface 11 and a second main surface 12.
[0043] As from Figure 5 As can be seen from FIG. 1 , the first main surface 11 and the second main surface 12 are connected to each other via side surfaces 13 and 14. Figure 5 It can further be seen that the weld seam 10 extends over the entire width of the strip 2 .
[0044] according to Figure 4 The thickness d of the weld 10 extends from the first main surface 11 to the second main surface 12 of the strip 2. The weld 10 can be, for example, an I-seam, a V-seam or a steep-sided seam.
[0045] Finally, it should be pointed out that, for a better understanding of the construction, some elements are partially shown not to scale and / or in an enlarged and / or reduced form.
[0046] Reference numerals list
[0047] 1 continuous belt
[0048] 2 belt body
[0049] 3 Segments
[0050] 4 Segments
[0051] 5. Welding gap
[0052] 6 Covering
[0053] 7 Regions
[0054] 8. Flux
[0055] 9Welding equipment
[0056] 10 Welding seam
[0057] 11 Main surface
[0058] 12 Main surface
[0059] 13 Side
[0060] 14 Side
Claims
1. A method for producing and / or processing a continuous strip (1) having a strip body (2) made of metal, wherein: At least two sections (3, 4) of the strip (2) are connected to each other by welding, characterized in that before welding the at least two sections (3, 4), a welding gap (5) formed in the abutment area of the at least two sections (3, 4) is covered with a cover (6) in step i), wherein in the subsequent step ii), a flux (8) is applied to at least at least one area (7) of the strip (2) adjacent to the cover (6) and not covered by the cover (6), wherein in the subsequent step iii), the cover (6) is removed and in step iv), the at least two sections (3, 4) are welded to each other along the welding gap (5).
2. The method according to claim 1, characterized in that The cover (6) is a film, in particular a plastic film, preferably an adhesive tape or a plastic strip, wherein the film is preferably a transparent film with a transmittance between 20% and 99%.
3. The method according to claim 1 or 2, characterized in that: The cover (6) has a width transversely to the longitudinal direction of the welding gap (5) of between 2 mm and 150 mm.
4. The method according to any one of claims 1 to 3, characterized in that The flux (8) applied in step ii) has 20% to 60% by weight of TiO x and / or 0%-5% (by weight) Cr3O x .
5. The method according to any one of claims 1 to 4, characterized in that The flux (8) is applied by spraying and / or brushing and / or rolling and / or printing.
6. The method according to any one of claims 1 to 5, characterized in that In step iv), a WIG welding method, a WP welding method, a WSG welding method, a MIG welding method, a MAG welding method, an MSG welding method, a laser welding method or a plasma welding method is used.
7. The method according to any one of claims 1 to 6, characterized in that The at least two sections (3, 4) form free end regions of the strip (2) before being connected to one another, wherein the strip is closed to form the continuous strip (1) by connecting the two sections (3, 4).
8. A continuous strip (1) having a strip body (2) made of metal, the continuous strip being manufactured according to the method according to any one of claims 1 to 7, characterized in that: The ratio of the thickness (d) of at least one weld seam (10) between at least two interconnected sections (3, 4) to the maximum width (b) of the weld seam (10) is greater than or equal to 1:4, in particular greater than or equal to 1:3, 1:2 or 2:
3.
9. The continuous belt according to claim 8, characterized in that The at least one weld seam (10) is a weld seam extending transversely or obliquely to the circumferential direction of the continuous strip (1), wherein the strip body (2) is closed to form the continuous strip (1) by the weld seam.
10. The continuous belt according to claim 8 or 9, characterized in that The strip (2) has a first main surface (11) and a second main surface (12), wherein the first main surface (11) and the second main surface (12) are connected to each other via side surfaces (13, 14), wherein the thickness (d) of the weld (10) extends from the first main surface (11) of the strip (2) to the second main surface (12), wherein the weld (10) is preferably an I-seam, a V-seam or a steep-side seam.
11. The continuous belt according to any one of claims 8 to 10, characterized in that The width (b) of the weld seam (10) is 2 mm-10 mm, in particular 5 mm-10 mm, particularly preferably 7 mm-8 mm.
12. The continuous belt according to any one of claims 8 to 11, characterized in that The belt body (2) has a thickness of 0.8 mm to 4 mm.
13. The continuous belt according to any one of claims 8 to 12, characterized in that The continuous belt (1) has a circumference of 2m-300m and a belt width of 1200mm-9000mm.
14. The continuous belt according to any one of claims 8 to 13, characterized in that The strip (2) is made of steel having 12.0%-28.0% Cr, 3.5%-15.0% Ni, 0%-14% Cu, 0%-1% Ti, 0%-2% Si, 0%-2% Mn, 0%-6% Mo, 0%-2% N and a maximum of 0.01%-0.20% C.
15. The continuous belt according to any one of claims 8 to 14, characterized in that The continuous belt has a strength of 1000 N / mm 2 -1800 N / mm 2 tensile strength.