A welding production line and welding method for a special-shaped horn mold and a cable metal sleeve

Abstract

The application discloses a special-shaped horn die, which comprises a die frame, a metal strip deformation frame arranged in the die frame, a ring-shaped support frame arranged in the metal strip deformation frame, and a curling block arranged between the ring-shaped support frame and the metal strip deformation frame and used for curling the edge of the metal strip outward to form a curled edge. The application further discloses a welding method of a cable metal sleeve, which comprises the following steps: making the cut metal strip pass through the special-shaped horn die to curl the edge of the metal strip outward to form a curled edge; making a cable core pass through the special-shaped horn die, so that the cable core is wrapped by the metal strip to form a formed cable; after the formed cable passes through the last special-shaped horn die, a straight handle welding gun is used to heat and melt the curled edge, a welding seam is welded, and the outside of the welding seam is smoothed; and after the formed cable after welding is rolled or drawn, the cable is wound. The application solves the technical problem of developing a special-shaped horn die and a welding production line and a welding method of a cable metal sleeve, which can improve the welding seam quality and the cable quality.

Description

Technical Field

[0001] This invention relates to the field of cable processing and manufacturing technology, and in particular to a welding production line and welding method for irregularly shaped horn molds and cable metal sheaths. Background Technology

[0002] The cable sheath is a crucial structural component of cables, typically made of aluminum, lead, or copper. It serves multiple functions, including electric field shielding, mechanical protection, short-circuit current carrying capacity, and waterproofing and moisture resistance. Aluminum is the most widely used metal sheath in cables due to its ease of processing, good conductivity, light weight, and low material cost. Aluminum sheaths are generally produced using two processes: extrusion and welding. Extrusion involves using aluminum ingots or rods through an aluminum press or extrusion machine. The aluminum is continuously extruded at high temperatures in a semi-molten state to form the sheath around the cable's insulating core. Extrusion temperatures can reach over 460℃. This process produces seamless sheaths; however, improper process control can negatively impact the cable's main insulation structure, reducing product quality and lifespan. Welding, on the other hand, uses rolled aluminum strips of uniform thickness. The process involves cleaning, precision cutting, longitudinal wrapping, forming, welding, online inspection, and corrugating. Compared to extrusion, welding is less energy-intensive and simpler to produce.

[0003] When producing cable metal sheaths using the weld-forming corrugated process, the matching of welding current and line speed affects the weld quality. Excessive current can lead to weld perforation, while insufficient current can result in incomplete welds. Because the outer diameter of the aluminum sheath shrinks after corrugation, the gap between the insulated core and the inner diameter of the aluminum sheath must be strictly controlled to ensure tight contact without damaging the insulation surface. Current welding processes and molds, even after achieving complete fusion of the weld seam, leave a raised "nodule" within the weld seam. Improper control of the inner gap during welding can burn the perforated layer and the surface of the insulated core, directly affecting cable production efficiency and product quality. It can also result in an uneven weld seam; when the inner protrusion exceeds 0.5mm, there is a direct or indirect quality risk.

[0004] Therefore, those skilled in the art are dedicated to developing a welding production line and welding method for irregularly shaped horn molds and cable metal sheaths that can improve weld quality and cable quality. Summary of the Invention

[0005] In view of the above-mentioned deficiencies of the prior art, the present invention discloses a welding production line and welding method for irregular horn molds and cable metal sleeves. The technical problem to be solved is to provide a welding production line and welding method for irregular horn molds and cable metal sleeves that can improve the quality of welds and cables.

[0006] To achieve the above objectives, the present invention provides an irregularly shaped horn mold, including a mold frame, a metal strip deformation frame inside the mold frame, an annular support frame inside the metal strip deformation frame, and a curling block connecting the annular support frame and the metal strip deformation frame. The curling block is used to curl the edge of the metal strip outward to form a welded edge with a curled edge.

[0007] Preferably, the metal strip deformation frame and the mold frame are detachably connected; the mold frame has screw holes, and a fixing screw is installed in the screw holes, passing through the screw holes and abutting against the metal strip deformation frame. The outer diameter of the metal strip deformation frame matches the size of the mounting hole provided on the mold frame. The inner diameter of the metal strip deformation frame varies, allowing for replacement of the metal strip deformation frame according to the cable requirements, and reinforcement of the metal strip deformation frame is achieved using fixing screws.

[0008] The present invention also provides a welding production line for cable metal sheaths, including the irregular horn mold as described above.

[0009] Preferably, a circular horn mold is provided upstream of the irregularly shaped horn mold, and several straight-handle welding guns corresponding to the welding edges are provided downstream of the irregularly shaped horn mold. The circular horn mold is used to curl the metal strip into a circular shape.

[0010] Preferably, the straight-handle welding torch includes a first welding torch vertically positioned at the rolled edge, a second welding torch positioned at 45° along the welding direction, and a third welding torch perpendicular to the welding direction. At least two first welding torches are used; the first welding torch heats and melts the rolled edge perpendicularly, the second welding torch is used to weld the weld at 45° along the welding direction, and the third welding torch is used to smooth the outer side of the weld perpendicular to the welding direction. By arranging the straight-handle welding torches at different positions and directions, melting, welding, and smoothing of the weld can be performed step-by-step, improving weld quality and resulting in a smooth outer side of the weld.

[0011] Preferably, simultaneously, several rollers are fixed on the inner side of the welding edges corresponding to the second and third welding guns. These rollers are located in the gap between the metal sheath and the cable core, used to smooth the inner side of the weld and control its dimensions. This prevents any raised "nodules" from remaining inside the metal sheath weld after complete melting and welding. This welding production line can produce cable metal sheaths with high-quality welds, smooth and flat inner and outer sides, further improving cable quality. Furthermore, the manufacturing process is simple, requires low-end equipment, and is environmentally friendly, making it widely applicable in the cable manufacturing field.

[0012] Preferably, the cable metal sheath welding production line of the present invention further includes a forming wheel located upstream of the circular horn mold, a metal strip precision cutting device located upstream of the forming wheel, and a cable feeding frame, a metal strip feeding frame, and a metal strip waste edge take-up frame located upstream of the metal strip precision cutting device; a metal sheath corrugating device and / or a metal sheath pulling device, a tracked traction machine, and a cable take-up frame are sequentially located downstream of the irregular horn mold.

[0013] The forming wheels are used to initially coil the metal strip. There are multiple sets of forming wheels, each set including a cam with an ellipsoidal surface and a concave wheel that cooperates with the cam. The metal strip precision cutting device is used to precisely cut the metal strip. The width W of the precision-cut metal strip is: W = πR² + 2, where R² is the outer diameter of the annular support frame. After welding, the metal sleeve can be subjected to corrugating or drawing processes, or it can be directly wound up.

[0014] Preferably, the inner diameter of the metal strip deformation frame satisfies the following calculation formula:

[0015] R1 = r + 3h + c + d + e;

[0016] The outer diameter of the annular support frame satisfies the following calculation formula:

[0017] R² = r + 2h + c + d + e;

[0018] in,

[0019] R1 is the inner diameter of the deformable frame of the metal strip;

[0020] R2 is the outer diameter of the annular support frame;

[0021] r is the outer diameter of the insulation layer of the cable core;

[0022] h is the thickness of the metal strip;

[0023] c represents the reserved gap between the outer insulation layer and the inner metal sheath of the cable core;

[0024] d is the groove depth;

[0025] e represents the necking dimension.

[0026] Preferably, the inner diameter R3 of the annular support frame is 2mm larger than the outer diameter of the cable core in this process, and the radius of curvature of the rolled edge block is 0.8-1.2mm, preferably 1.0mm; the straight-handle welding torch is connected to a continuously adjustable welding current of 30-300A. Excessive current can cause weld perforation, while insufficient current can result in incomplete welding; a continuously adjustable current can avoid this problem.

[0027] The present invention also provides a method for welding cable metal sheaths, using the cable metal sheath welding production line described above, comprising the following steps:

[0028] 1) The metal strip on the metal strip pay-off stand is cut by the metal strip precision cutting device, and the waste edges after cutting are recycled by the metal strip waste edge take-up stand;

[0029] 2) The cut metal strip is curled into a circle by forming wheels and a circular horn mold, and then the metal strip is curled outward by the metal strip deformation frame of the irregular horn mold to form a rolled edge.

[0030] 3) The cable core passes through the annular support frame of the irregular horn mold via the cable laying frame. The cable core is wrapped with metal strip to form a shaped cable. The shaped cable is moved by the traction of the crawler-type traction machine.

[0031] 4) After the formed cable passes through the last irregular horn mold, two first welding guns are used in sequence to heat and melt the rolled edge perpendicular to it, the second welding gun is used to weld the weld at 45° along the welding direction, and the third welding gun is used to smooth the outside of the weld perpendicular to the welding direction.

[0032] 5) After the welded and formed cable is corrugated or pulled by a metal sheath corrugating device or a metal sheath pulling device, it is taken up by a cable take-up frame.

[0033] The beneficial effects of this invention are:

[0034] By setting up an irregularly shaped horn mold, compared with the existing traditional metal sleeve welding method, the ring support frame and the rolled edge block form an Ω-shaped horn mold, which achieves the effect of rolling the edge of the metal strip outward, increasing the welding thickness, preventing the weld from penetrating, so as to produce a better quality weld and further improve the quality of the cable. Attached Figure Description

[0035] Figure 1 This is a structural schematic diagram of a specific embodiment of the irregular-shaped speaker mold of the present invention;

[0036] Figure 2 yes Figure 1 A magnified view of the structure at point A in the middle;

[0037] Figure 3 This is a schematic diagram of a specific embodiment of the welding production line for cable metal sheaths of the present invention;

[0038] Figure 4 This is a partial structural schematic diagram of the welding production line for the cable metal sheath of the present invention;

[0039] Figure 5 This is a flowchart of the welding process for the cable metal sheath of the present invention.

[0040] In the above attached figures: 1. Irregular horn mold; 11. Mold frame; 12. Metal strip deformation frame; 13. Annular support frame; 14. Edge rolling block; 15. Fixing screw; 2. Circular horn mold; 3. Straight shank welding torch; 31. First welding torch; 32. Second welding torch; 33. Third welding torch; 4. Roller; 51. Forming wheel; 52. Metal strip precision cutting device; 53. Cable delivery rack; 54. Metal strip delivery rack; 55. Metal strip waste edge take-up rack; 61. Metal sleeve corrugating device; 62. Metal sleeve pulling device; 63. Tracked traction machine; 64. Cable take-up rack; 71. Cable core; 72. Metal strip; 73. Formed cable. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific manner. Therefore, they should not be construed as limitations on the present invention. Terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] like Figure 1 and Figure 2 As shown, this invention provides an irregularly shaped speaker mold 1, including a mold frame 11. A metal strip deformation frame 12 is provided inside the mold frame 11. The metal strip deformation frame 12 is used to curl the metal strip 72 into a metal sleeve. An annular support frame 13 is provided inside the metal strip deformation frame 12. The annular support frame 13 and the metal strip deformation frame 12 are connected by a curling block 14, which is used to curl the edge of the metal strip 72 outwards to form a welded edge with a curled edge. Specifically, the metal strip deformation frame 12 and the mold frame 11 are detachably connected. A screw hole is provided on the mold frame 11, and a fixing screw 15 is provided in the screw hole. The fixing screw 15 passes through the screw hole and abuts against the metal strip deformation frame 12. The outer diameter of the metal strip deformation frame 12 matches the size of the mounting circular hole provided on the mold frame 11. The inner diameter of the metal strip deformation frame 12 varies, allowing for replacement of the metal strip deformation frame 12 according to cable requirements, and reinforcement of the metal strip deformation frame 12 is achieved using the fixing screw 15.

[0043] In the above embodiments, by setting the irregular horn mold 1, compared with the existing traditional metal sleeve welding form, the annular support frame 13 and the rolled edge block 14 form an Ω-shaped horn mold, which achieves the effect of rolling the edge of the metal strip 72 outward, increasing the welding thickness, preventing the weld from being punctured, so as to produce a better quality weld and further improve the quality of the cable.

[0044] like Figure 3 As shown, the present invention also provides a welding production line for cable metal sheaths, including the irregularly shaped horn mold 1 as described above. Further, a circular horn mold 2 is provided upstream of the irregularly shaped horn mold 1, which is used to curl the metal strip 72 into a circular shape. Downstream of the irregularly shaped horn mold 1, several straight-handle welding torches 3 are provided, corresponding to the welding edge positions, such as... Figure 4 As shown, the straight-handle welding torch 3 includes a first welding torch 31 vertically positioned at the rolled edge, a second welding torch 32 positioned at 45° along the welding direction, and a third welding torch 33 perpendicular to the welding direction. There are at least two first welding torches 31. The first welding torch 31 heats and melts the rolled edge perpendicularly. The second welding torch 32 is used to weld the weld at 45° along the welding direction, and the third welding torch 33 is used to smooth the outer side of the weld perpendicular to the welding direction. By setting the straight-handle welding torch 3 in different positions and directions, melting, welding, and smoothing the weld can be performed step-by-step, improving weld quality and making the outer side of the weld smooth. Simultaneously, several rollers 4 are fixed inside the metal sleeve on the inner side of the corresponding welding edge of the second welding torch 32 and the third welding torch 33. The rollers 4 are located in the gap between the metal sleeve and the cable core 71, used to smooth the inner side of the weld and control the inner dimensions of the weld. This ensures that after the metal sleeve weld is completely melted and welded, it avoids leaving any protruding "lumps" inside the metal sleeve weld. This welding production line can produce cable metal sheaths with high-quality welds, smooth and flat inner and outer sides, further improving cable quality. Furthermore, the manufacturing process is simple, requires minimal equipment, and is environmentally friendly, making it widely applicable in the cable manufacturing industry.

[0045] More specifically, the cable metal sheath welding production line of the present invention also includes a forming wheel 51 located upstream of the circular horn mold 2. Upstream of the forming wheel 51 is a metal strip precision cutting device 52, and upstream of the metal strip precision cutting device 52 are a cable feeding frame 53, a metal strip feeding frame 54, and a metal strip waste edge take-up frame 55. Downstream of the irregular horn mold 1 are sequentially a metal sheath creasing device 61, a metal sheath pulling device 62, a tracked traction machine 63, and a cable take-up frame 64. The metal sheath creasing device 61 and the metal sheath pulling device 62 can be operated by only one of them according to production needs, thus diversifying the functions of this welding production line. The forming wheel 51 is used to initially curl the metal strip 72. There are multiple sets of forming wheels 51, each set including a cam with an ellipsoidal surface and a concave wheel that cooperates with the cam. The metal strip precision cutting device 52 is used to precisely cut the metal strip 72. The width W of the precision-cut metal strip 72 is: W = πR2 + 2, where R2 is the outer diameter of the annular support frame 13. After welding, the metal sleeve can be subjected to corrugation or drawing processes, or it can be directly wound up.

[0046] In the above embodiments, the inner diameter of the metal strip deformation frame 12 satisfies the following calculation formula:

[0047] R1 = r + 3h + c + d + e;

[0048] The outer diameter of the annular support frame 13 satisfies the following calculation formula:

[0049] R² = r + 2h + c + d + e;

[0050] in,

[0051] R1 is the inner diameter of the metal strip deformable frame 12;

[0052] R2 is the outer diameter of the annular support frame 13;

[0053] r is the outer diameter of the insulation layer of the cable core 71;

[0054] h represents the thickness of the metal strip 72;

[0055] c is the reserved gap between the outer insulation layer and the inner metal sheath of the cable core 71;

[0056] d is the groove depth;

[0057] e represents the necking dimension.

[0058] The inner diameter R3 of the annular support frame 13 is 2mm larger than the outer diameter of the cable core 71 in this process. The radius of curvature of the rolled edge block 14 is 0.8-1.2mm, and in this embodiment it is 1.0mm. The straight-handle welding torch 3 is connected to a continuously adjustable welding current of 30-300A. Excessive current will cause the weld to perforate, while insufficient current will result in a weak weld. The continuously adjustable current can avoid this problem.

[0059] like Figure 5 As shown, the present invention also provides a method for welding cable metal sheaths, using the above-described cable metal sheath welding production line, comprising the following steps:

[0060] 1) The metal strip 72 on the metal strip feeder 54 is cut by the metal strip precision cutting device 52, and the waste edge after cutting is recycled by the metal strip waste edge take-up frame 55.

[0061] 2) The cut metal strip 72 is curled into a circle by the forming wheel 51 and the circular horn mold 2, and then the edge of the metal strip 72 is curled outward by the metal strip deformation frame 12 of the irregular horn mold 1 to form a rolled edge.

[0062] 3) The cable core 71 passes through the annular support frame 13 of the irregular horn mold 1 via the cable laying frame 53. The cable core 71 is wrapped by the metal strip 72 to form a shaped cable 73. The shaped cable 73 is moved by the traction of the tracked traction machine 63.

[0063] 4) After the formed cable 73 passes through the last irregular horn mold 1, it is successively heated and melted by two first welding guns 31 perpendicular to the rolled edge, the second welding gun 32 welds the weld at 45° along the welding direction, and the third welding gun 33 smooths the outside of the weld perpendicular to the welding direction.

[0064] 5) After the welded shaped cable 73 is corrugated or pulled by the metal sheath corrugating device 61 or the metal sheath pulling device 62, it is taken in by the cable take-up frame 64.

[0065] This welding method has a simple preparation process, low equipment requirements, and is environmentally friendly, making it widely applicable in the cable manufacturing industry.

[0066] The present invention will be further illustrated below with specific embodiments. However, the following embodiments are only for the purpose of helping to understand the technology of the present invention and should not be used as a further limitation on the scope of protection of the present invention. Specific Implementation Example 1:

[0068] Taking the metal armor sleeve of YJLW031×80064 / 110kV corrugated aluminum sheathed cable as an example, before welding, the outer diameter of the cable is 80.0mm, the thickness of the metal strip is 2.0mm, the width of the metal strip is 310.0mm, the inner diameter of the metal strip deformation frame is 100.0mm, the outer diameter of the cable core support frame is 98.0mm, and the inner diameter of the cable core support frame is 85.0mm. The final welding effect is shown in Table 1. Specific Implementation Example 2:

[0070] Taking the metal armor sleeve of YJLP031×80064 / 110kV smooth aluminum sheathed cable as an example, before welding, the outer diameter of the cable is 80.0mm, the thickness of the metal strip is 2.0mm, the width of the metal strip is 283.0mm, the inner diameter of the metal strip deformation frame is 92mm, the outer diameter of the cable core support frame is 90.0mm, and the inner diameter of the cable core support frame is 85.0mm. The final welding effect is shown in Table 1.

[0071] To further illustrate the advantages of this patent, this paper will describe the invention using comparative embodiments in conjunction with existing production methods.

[0072] Comparative Example 1:

[0073] Taking the metal armor sleeve of YJLW031×80064 / 110kV corrugated aluminum sheathed cable as an example, the traditional welding process was adopted. Before welding, the outer diameter of the cable was 80.0mm, the thickness of the metal strip was 2.0mm, the width of the metal strip was 308mm, and the inner diameter of the circular horn mold was 98.0mm. The final welding effect is shown in Table 1.

[0074] Comparative Example 2:

[0075] Taking the metal armor sleeve of YJLP031×80064 / 110kV smooth aluminum sheathed cable as an example, the traditional welding process was adopted. Before welding, the outer diameter of the cable was 80.0mm, the thickness of the metal strip was 2.0mm, the width of the metal strip was 281.0mm, and the inner diameter of the circular horn mold was 90.0mm. The final welding effect is shown in Table 1.

[0076] Table 1 - Welding effect of metal sleeve in the examples

[0077]

[0078] As can be seen from Table 1, the main difference in actual production lies in the quality of the inner and outer sides of the weld. For the same product, the metal sleeve produced by this patent can fully meet the existing process requirements, and the quality of the inner and outer sides of the weld is good, smooth and without any bumps.

[0079] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A welding production line for cable metal sheaths, characterized in that: It includes an irregular horn mold (1), an upstream circular horn mold (2) is provided above the irregular horn mold (1), a forming wheel (51) is provided upstream of the circular horn mold (2), a metal strip precision cutting device (52) is provided upstream of the forming wheel (51), and a cable feeding frame (53), a metal strip feeding frame (54) and a metal strip waste edge take-up frame (55) are provided upstream of the metal strip precision cutting device (52). Downstream of the irregular horn mold (1) are arranged a metal sleeve corrugating device (61) and / or a metal sleeve pulling device (62), a tracked traction machine (63), and a cable take-up frame (64). The irregular horn mold (1) includes a mold frame (11), a metal strip deformation frame (12) is provided inside the mold frame (11), an annular support frame (13) is provided inside the metal strip deformation frame (12), the annular support frame (13) and the metal strip deformation frame (12) are connected by a curling block (14), the curling block (14) is used to curl the edge of the metal strip (72) outward to form a welded edge with a curled edge, and the annular support frame (13) and the curling block (14) are in the shape of Ω; The metal strip deformation frame (12) and the mold frame (11) are detachably connected; the mold frame (11) has a screw hole, and a fixing screw (15) is provided in the screw hole. The fixing screw (15) passes through the screw hole and abuts against the metal strip deformation frame (12); The metal sleeve contains several rollers (4), which are located in the gap between the metal sleeve and the cable core (71).

2. The cable metal sheath welding production line as described in claim 1, characterized in that: Downstream of the irregular horn mold (1) are several straight-handle welding guns (3) corresponding to the welding edge.

3. The cable metal sheath welding production line as described in claim 2, characterized in that: The straight-handle welding torch (3) includes a first welding torch (31) vertically disposed at the rolled edge, a second welding torch (32) disposed at 45° along the welding direction, and a third welding torch (33) perpendicular to the welding direction.

4. The cable metal sheath welding production line as described in claim 3, characterized in that: Several rollers (4) are fixed on the inner side of the welding edge corresponding to the second welding gun (32) and the third welding gun (33).

5. The cable metal sheath welding production line as described in claim 4, characterized in that: The inner diameter of the metal strip deformation frame (12) satisfies the following calculation formula: R1 = r + 3h + c + d + e; The outer diameter of the annular support frame (13) satisfies the following calculation formula: R² = r + 2h + c + d + e; in, R1 is the inner diameter of the deformable frame of the metal strip; R2 is the outer diameter of the annular support frame; r is the outer diameter of the insulation layer of the cable core; h is the thickness of the metal strip; c is the reserved gap between the outer insulation layer and the inner metal sheath of the cable core; d is the corrugation depth. e represents the necking dimension.

6. The cable metal sheath welding production line as described in claim 5, characterized in that: The inner diameter R3 of the annular support frame (13) is 2 mm larger than the outer diameter of the cable core (71) in the process of the cable core (71) passing through the cable laying frame (53) through the irregular horn mold (1) and the cable core (71) being wrapped by the metal strip (72) to form the shaped cable (73). The radius of curvature of the rolled edge block (14) is 0.8 to 1.2 mm. The straight-handle welding torch (3) is connected to a continuously adjustable welding current of 30 to 300A.

7. A method for welding a cable metal sheath, characterized in that: The welding production line for cable metal sheaths as described in claim 6 includes the following steps: 1) The metal strip (72) on the metal strip feeder (54) is cut by the metal strip precision cutting device (52), and the waste edge after cutting is recycled by the metal strip waste edge take-up frame (55); 2) The cut metal strip (72) is curled into a circle by the forming wheel (51) and the circular horn mold (2), and then the edge of the metal strip (72) is curled outward by the metal strip deformation frame (12) of the irregular horn mold (1) to form a rolled edge. 3) The cable core (71) passes through the annular support frame (13) of the irregular horn mold (1) via the cable laying frame (53). The cable core (71) is wrapped by the metal strip (72) to form a shaped cable (73). The shaped cable (73) is moved by the traction of the tracked traction machine (63). 4) After the formed cable (73) passes through the last irregular horn mold (1), two first welding guns (31) are used to heat and melt the rolled edge perpendicularly, the second welding gun (32) welds the weld at 45° along the welding direction, and the third welding gun (33) smooths the outside of the weld perpendicular to the welding direction. 5) The welded shaped cable (73) is crumpled or pulled by a metal sheath crumpling device (61) or a metal sheath pulling device (62) and then taken in by a cable take-up frame (64).

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