Welding aid and method of securing a cable at a conductor face
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- MD ELEKTRONIK GMBH
- Filing Date
- 2021-06-11
- Publication Date
- 2026-06-16
AI Technical Summary
Existing technologies struggle to efficiently fix small-section core wires in large quantities and with high positioning accuracy onto conductor surfaces, especially contact surfaces on circuit boards, and it is difficult to achieve precise positioning and fixing of multiple core wires.
The welding aid, made of electrically insulating material, includes conductive contacts and a receiving portion. The receiving portion has a groove and through hole open to one side for accommodating the core wire. The core wire is mechanically and electrically connected to the conductor surface by solder connection. The aid is designed to allow the solder to solidify within the receiving portion to fix the core wire.
It enables precise positioning and fixing of small cross-section core wires on the conductor surface, allowing multiple core wires to be aligned in a single process step and fixed to the conductor surface by welding or bonding, simplifying the operation process and improving positioning accuracy and reliability.
Smart Images
Figure CN113972514B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of securing the core wire of a cable to a conductor surface, which is, for example, a conductive contact surface (so-called pad) on a circuit board or so-called printed circuit board. The securing of the conductive core wire to the contact surface can be achieved, in particular, by solder jointing, wherein limitedly melted and solidified solder contacts the core wire of the cable and the contact surface of the conductor surface, thereby mechanically and electrically connecting them thereto. Here, the proposed circuit board may be part of a cable connector or part of a control device. Background Technology
[0002] In practice, the cross-section needs to be as small as possible, for example, approximately 0.1 mm. 2 Or even smaller core wires are positioned and fixed to corresponding small contact surfaces in large quantities and with high positioning accuracy. In addition, it is usually necessary to position and fix multiple core wires at defined intervals to the corresponding contact surfaces.
[0003] US 5,021,630 A describes the use of a glass plate to fix electronic components to a substrate, wherein the glass plate is heated by a laser, causing solder to melt on the core wires of the electronic components.
[0004] DE 10 2008 013 226 A1 describes fixing electronic (surface mount) components to solder paste via contact surfaces, the solder paste being disposed within recesses in the conductor surface. The conductor surface must have recesses before fixing, and the solder paste is freely disposed on the surface of the conductor surface.
[0005] EP 3 477 798 A1 describes an apparatus for securing a first core wire in a housing by means of an extrusion device, the extrusion device pre-fixing the core wire so that a second core wire can be secured in the housing in the same way.
[0006] DE 100 46 489 C1, referring to Figure 4, describes the joining of an end-stripped cable to a contact surface, wherein a single or multiple layers of carrier film are provided between the core wire and a toothed contact, wherein the contact is constructed as a crimp sleeve, and the teeth of the crimp sleeve penetrate the carrier film. In the region between the core wire and the contact surface, a solder reservoir is provided between the teeth, and the solder reservoir is melted by heating the crimp sleeve; in an alternative embodiment, the solder reservoir is positioned between the carrier film and the contact such that the molten solder must pass through a recess in the carrier film. Summary of the Invention
[0007] The object of this invention is to provide a feasible solution for mass positioning of core wires with particularly small cross-sections on a conductor surface.
[0008] The welding aid according to the invention particularly has a body made of an electrically insulating material and a conductive contact disposed within the body. The contact has a contact surface for conductively contacting a conductor surface, wherein a receiving portion is provided in the body, the receiving portion having a groove open to one side for the core wire of a cable and a through hole including a sheath section. The contact closes the opening at the bottom of the groove and conductively contacts the core wire.
[0009] Conductive contact between the core wire and the conductor surface is formed by a contact element housed on or within an electrically insulating body. This body, as a flat three-dimensional form, can be easily manipulated, accommodating the core wire and the sheath section of the cable adjacent to the core wire in the area of its receiving portion. A groove open to one side for the core wire allows for simple control of the core wire and easy transportability of the solder; furthermore, rapid heat transfer or heat dissipation for heating or cooling the solder is feasible. A through-hole construction including the sheath section of the cable enables simple transport, orientation, and fixation of the core wire relative to the groove and the contact element. The groove has an opening at its bottom, which is closed by the contact element, so that the contact element contacts and electrically connects the core wire only after the solder has cured in the groove and is held in the groove by the contact element.
[0010] The welding aid according to the invention realizes a composite consisting of a cable having at least one core wire and a welding aid, wherein it is particularly possible to fix two or more cables, each having at least one core wire, at a single welding aid. Here, two or more cables can be precisely positioned relative to each other in a single process step. The composite can be formed by permanently fixing at least one core wire to the contact of the welding aid, for example, by welding the core wire to the contact. The fixed composite can be stored as an intermediate product and used to position the core wire on the conductor surface when needed. Optionally or additionally, when the cable sheath is held in a clamping manner, i.e., with slight deformation of the elastic material of the cable sheath, in the through-hole of the receiving sheath of the receiving portion, the composite can be constructed by slightly, i.e., detachably, fixing the core wire to the welding aid if necessary; this clamping reception is particularly achieved when the through-hole for the welding aid has a diameter that tapers from the inlet. The through-hole is constructed particularly tapered towards the groove, particularly locally tapered.
[0011] The welding aid also implements a method for fixing the core wire of a cable to the conductor surface, wherein in a first method step, the aforementioned composite consisting of at least one core wire of at least one cable is manufactured, and in a second method step, at least one contact of the welding aid is fixed to the conductor surface, which can be achieved, for example, by welding, but also by adhesive bonding using conductive adhesive.
[0012] Preferably, for welding aids, the receiving portion is arranged substantially parallel to the contact surface of the contact element.
[0013] Preferably, for welding aids, the groove is constructed as an open longitudinal groove pointing away from the contact surface, thereby ensuring that the molten solder in the open longitudinal groove does not reach the conductor surface and remains within the groove.
[0014] In a preferred design, the through-hole in the body of the welding aid has a diameter that tapers from the inlet. Specifically, if the diameter of the through-hole decreases at least segmentally with increasing distance from the inlet, the through-hole is constructed with at least a locally tapered shape. Here, the cable sheath is clamped into the area of the through-hole, i.e., the cable and its core are pre-secured relative to the groove in the body of the welding aid.
[0015] Preferably, the through-hole has a stepped portion. In the region of the stepped portion, the diameter of the through-hole abruptly decreases, so that the sheath edge formed during cable stripping has a supporting surface that abuts against the stepped portion. When the stripped cable end is introduced, a stop portion is formed that can be easily detected by a sensor, which ensures that the cable end is correctly positioned in the receiving portion. This automatically detectable stop portion cooperates with the welding aid to automatically assemble the stripped cable end.
[0016] Preferably, the opening at the bottom of the groove is a longitudinal cut. Due to the extension of the longitudinal cut, the contact surface of the section of the longitudinal cut is expanded to cover the solder and the contact element, so that reliable electrical contact with the contact element can be achieved even if the core wire is not completely wetted by the molten and solidified solder.
[0017] Preferably, the contact element is constructed as a profiled sheet blank, and more preferably, the contact element has a substantially U-shaped profile. Here, a first facet segment of the U-shape covers the bottom of the groove, for example, at one of the legs of the U-shape, and a second facet segment of the U-shape is constructed as a contact portion of the conductor surface, for example, at the other leg of the U-shape. Instead of constructing the contact element as a substantially U-shaped profile, it is proposed that the contact element be constructed as a flat metal blank. The flat metal blank covers the bottom of the groove with a first facet segment on one side and contacts the conductor surface with a second facet segment on the other side. Constructing the contact surface as a flat metal blank has the advantage that the welding aid is constructed particularly flat, such that the welding aid has only a small extension in the direction perpendicular to the bottom surface of the body.
[0018] Regardless of the specific design of the contact element, it is preferable that the contact element has a locking hook, and the contact element is fixed in the body by means of the locking hook.
[0019] Preferably, the main body has a supporting surface, and the contact surface of the contact element is constructed to be substantially flush with the supporting surface of the main body.
[0020] Preferably, the body has a first height H in the region of the through hole and a second height h in the region of the groove, and the first height H is greater than the second height h.
[0021] One advantageous design also proposes that the main body be constructed as a single piece, especially as an injection-molded part.
[0022] Preferably, the body is made of plastic, especially of glass fiber reinforced polyphthalamide.
[0023] For welding aids, it is also preferable that the body has a positioning aid protruding beyond the contact surface. The positioning aid may, for example, include at least one, preferably two or more tapered studs that engage in a positioning receptacle in a region near the conductor surface of the circuit board, and the engagement of at least one stud in the positioning receptacle simplifies the positioning of the welding aid, particularly the contact, relative to the conductor surface on the circuit board. The tapered studs may have a circular or elliptical cross-section, and thus be cylindrical or tapered. Alternatively, the studs may also have a rectangular, particularly square, more generally polygonal cross-section, and be tapered particularly towards one end. Specifically, a positioning aid is provided at the body, comprising at least two spaced-apart studs, wherein the at least two studs are part of a four-point support arrangement. In a particular design of the welding aid, the two spaced-apart studs of the positioning aid, together with two spaced-apart support face segments spaced apart from the studs, integrally constitute a four-point support arrangement.
[0024] Other advantages and features of the invention will become apparent from the description of preferred embodiments. Attached Figure Description
[0025] The invention will now be described and explained in more detail with reference to the accompanying drawings.
[0026] Figure 1 An exploded perspective view of an embodiment of a composite component according to the present invention is shown. The composite component comprises four cables, each having a core wire, and a welding auxiliary component according to an embodiment of the present invention.
[0027] Figure 2 A top view is shown of a composite component and a welding aid that exemplarily perform the method according to the invention;
[0028] Figure 3 Show Figure 1 and Figure 2 A three-dimensional view of the welding auxiliary components;
[0029] Figure 4 Show Figures 1 to 3 A sectional view of the welding auxiliary parts in the diagram; and
[0030] Figure 5 Show along Figure 2 The sectional view of section line CC. Detailed Implementation
[0031] Figure 1 An assembly is shown comprising a composite consisting of at least one, or four, cables, each having exactly one core wire. Here, only one of the four cables is assigned reference numeral "2," and the core wire of the cable with reference numeral 2 is assigned reference numeral "3." The composite 1 also includes a soldering aid 4, which comprises a body 5. In the illustrated embodiment, the soldering aid 4 further includes four contacts, each associated with a specific core wire of one of the four cables, wherein only one of the contacts is assigned reference numeral "6." Each contact thus configured has a contact surface, wherein only the contact surface of contact 6 is adorned with reference numeral "9." The composite 1 also includes a conductor surface 7 configured as a circuit board or printed circuit board (PCB), wherein four contact surfaces, i.e., so-called solder pads, are provided on the conductor surface 7, and wherein only one of the four contact surfaces is adorned with reference numeral "8."
[0032] A method for securing cables to conductor surfaces 7 is proposed: In a preparation step, at least one contact 6 is secured in a body 5, thereby forming a welding aid 4. Following this preparation step, in a first step, a composite 10 is manufactured, consisting of at least one cable 2, each having at least one core wire 3, and the welding aid 4. For this purpose, the core wire 3 is at least temporarily secured to the welding aid 4, such that the composite 10 consisting of the core wire and the welding aid 4 can be automatically manipulated as a whole. In the illustrated embodiment, all core wires of each cable are secured in the same welding aid 4, more specifically, at a predetermined spacing, which is predetermined by the spacing of the contact surfaces 8 on the conductor surface 7. In a second step, the composite 10 consisting of at least two, particularly four, core wires of four cables is secured to the conductor surface 7 such that the corresponding contact surface 9 of the corresponding contact 6 is secured to the associated contact surface 8. Then, for example, a second method step of fixing the contact 6 of the welding aid 4 to the conductor surface 7 is performed by reflow soldering, such that each contact surface 9 is fixed to the associated contact surface 8 by the final reflow soldering step.
[0033] The core wire 3 of the corresponding cable 2 has a diameter of approximately 0.14 mm. 2Or even smaller cross-sections, and are set on a circuit board for transmitting signals to control devices.
[0034] Figure 2 A top view of the manufactured component 1 is shown, which includes a composite 10 consisting of a welding aid 4 and a core wire 3 of a cable 2. At the latest in the arrangement shown, the corresponding core wire 3 is finally fixed to the welding aid 4 in such a way that the core wire 3 is mechanically and electrically connected to the welding aid 4 by welding after the molten and liquefied solder has solidified.
[0035] Figure 5 A longitudinal section is shown that runs through component 1, particularly composite 10, and conductor surface 7.
[0036] The welding aid 4 is designed to mechanically and electrically connect the core wire 3 of the cable 2 to the contact surface 8 of the conductor surface 7.
[0037] The welding auxiliary component 4 includes a body 5 made of an electrically insulating material, and in particular of plastic, specifically glass fiber reinforced polyphthalamide. The body 5 is formed in one piece, i.e., as an injection molded part. In particular, the body 5 is designed and implemented as a three-dimensional, flat, and stepped plastic molded part.
[0038] The welding auxiliary component 4 also includes a contact 6 made of conductive material, wherein the contact 6 is manufactured and supplied separately from the body 5, but is arranged in the body 5 and is fixed to the body 5 in a way that prevents it from being detached.
[0039] The main body 5 of the welding auxiliary component is in Figure 3 It is shown in a three-dimensional diagram and in Figure 4 The image is shown in a longitudinal section.
[0040] The main body 5 is provided with a receiving part 11, which has two mutually aligned and merged sub-regions.
[0041] The first sub-region is constructed as a recess 12 that opens to one side. The recess 12 is designed to accommodate the exposed core wire 3 of the cable 2, and the longitudinal extension of the recess 12 substantially corresponds to the length to which the cable 2 is stripped to expose the core wire 3. The recess 12 is constructed to open to one side... Figure 3 and Figure 4 In the view, it faces upwards, away from the contact surface 8, and points downwards. The groove 12 is in... Figure 3 and Figure 4The groove 12 is partially closed at the bottom 15, facing downwards to the other side, i.e., towards the contact surface 8, with an opening, i.e., a gap, remaining between the bottom 15 and the end face 14 of the groove 12. The opening at the bottom 15 of the groove 12 is constructed as a longitudinal cut that extends transversely to the longitudinal direction of the groove 12. The size of the opening is determined such that the longitudinal cut is closed by the contact member 6, so that the solder liquefiedly contained in the groove 12 does not directly reach the contact surface 8 of the conductor surface 7 due to the closure of the opening by the introduction of the contact member 6.
[0042] The extension of groove 12 is approximately 2.5 times the diameter of core wire 3.
[0043] The receiving portion 11 has a through-hole as a second sub-region, which is included in the sheath section of the end-stripped cable, particularly in... Figure 4 As can be seen, the through hole 17 has a diameter that tapers from the inlet 18.
[0044] In the first sub-section 17a directly adjacent to the inlet 18, the diameter of the through hole 17 decreases substantially linearly as the distance from the inlet 18 increases along the longitudinal extension of the through hole 17, such that the through hole 17 is tapered in the region of the first sub-section.
[0045] In the second sub-section 17b, the through-hole 17 has a substantially constant diameter, which is determined such that the diameter of the second sub-section 17b is slightly smaller than the diameter of the sheath of the cable 2, so that the end portion of the sheath of the cable 2 is elastically tensioned and held by clamping in a slightly deformable manner in the region of the second sub-section 17b. The clamping method allows for easy fastening of the end portion of the sheath of the cable 2, ensuring that the cable 2 is at least fastened in the body 5 of the welding aid 4 such that the cable 2 can be manipulated together with the welding aid 4.
[0046] In the third sub-section 17c, the through-hole 17 has a diameter that is smaller than that of the second sub-section 17b, wherein the transition of the diameter is discontinuous, such that the through-hole 17 has a stepped portion 19. Figure 5 As shown, the sheath edge formed when the cable is stripped at end 2 abuts against the stepped portion, so that there is a stop that can be detected by a sensor when the stripped cable end is introduced, and the introduction movement can be automatically interrupted.
[0047] The diameter of the third sub-section 17c of the through hole is smaller than the diameter of the sheath of the cable 2, but larger than the diameter of the core wire 3 of the cable 2, so that the core wire 3 is accommodated in the third sub-section 17c with a small gap.
[0048] When the stripped end section of cable 2 is introduced, the exposed core wire 3 is centrally accommodated in the region of the tapered first sub-section 17a of the through-hole 17. In the region of the second sub-section 17b, the end section of the cable 2 sheath adjacent to the sheath edge is clamped in a clamping manner, wherein the sheath edge abuts the stepped portion 19 when transitioning from the second sub-section 17b to the third sub-section 17c. In particular, the longitudinal extension of the groove 12 and the size of the through-hole 17 are designed and coordinated to ensure that the core wire 3 is fully accommodated in the groove 12 at the introduction position and to maintain a clearance from the end face 14 of the groove 12.
[0049] In a variation of the above embodiment, the design of the through hole 17 can be proposed as follows: the tapered first sub-section directly transitions to the third sub-section with a reduced diameter, so that the stepped portion 19 is directly constructed between the first sub-section and the third sub-section.
[0050] Regarding the term "through hole," it should be noted that it does not necessarily imply drilling through material stripping. The term "through hole" generally refers to a material void having an outlet opening 20 in addition to the inlet 18, such a hole can be formed in an injection molding process using a suitable spacer.
[0051] In the above embodiment, the through hole 17 in the area away from the opening 20 transitions directly to the groove 12 adjacent in the introduction direction.
[0052] The main body 5 of the welding auxiliary component 4 also includes two molded parts 22a and 22b, which are directly constructed at each of the two short sides 23a and 23b. Figure 2 ).like Figure 3 As shown, the two molded parts 22a and 22b are respectively cylindrical in structure and protrude beyond the substantially flat bottom surface 21 of the main body 5 by the same value. Figure 4 ), to form two flat support surfaces, one of which is in Figure 4 The figure is accompanied by reference numeral 24. The main body 5 is mounted on the surface of the conductor surface 7 with a corresponding support surface 24.
[0053] The main body 5 also includes a positioning auxiliary component 25, which includes two anchor posts 26. The anchor posts protrude from the corresponding sides 23a and 23b by means of cantilever arms and extend a certain distance from the plane of the bottom surface 21, so that in the installation position of the main body 5 ( Figure 5 Each post 26 engages with the associated positioning receiving portion 27 in the conductor surface 7 and passes through the conductor surface 7. Figure 1 and Figure 5 The two support surfaces 24 on the sides 23a and 23b of the two main bodies 5 and the two bolts 26 together form a four-point support arrangement, which achieves correct orientation and fastening when the main bodies 5 are installed on the conductor surface 7.
[0054] Figure 4 It is also shown that the body 5 has a first height H in the region of the through hole 17 and a second height h in the region of the groove 12, wherein the first height H is greater than the second height h. Heights H and h here refer to the plane of the flat bottom surface 21 of the body 5. The body 5 can be constructed as a one-piece part, particularly in the injection molding method, by selecting an appropriate placeholder, in which case constructing the groove 12 open to one side particularly does not require subsequent material stripping.
[0055] In the illustrated embodiment, the corresponding contact 6 has a U-shaped profile ( Figure 1 , Figure 5 In this configuration, in the mounting position of the contact 6, the bottom 15 of the groove 12 is accommodated between the U-shaped legs. The contact 6 closes the opening in the bottom 15 of the groove 12. The contact surface 9 of the contact 6 is formed by the outer portion of the first leg of the contact 6; furthermore, the bottom 15 of the groove is covered by the outer portion of the second leg of the contact 6, such that the core wire 3 in the groove 12 makes contact with the contact 6 and the contact 6 constitutes a conductive connection between the core wire 3 and the contact surface 8.
[0056] Unlike the embodiment shown where the contact 6 has a substantially U-shaped profile in the side view, in a variation of this embodiment, the contact may have a substantially Z-shaped profile in the side view.
[0057] The contact element 6 is constructed as a contour-formed slab blank, the slab blank being bent at its contour edges, and the slab blank being a flat slab blank with a matching outer contour. The outer contour of the slab blank is configured such that the contact element 6 has a locking hook, and the contact element 6 is fixed in the body 5 by means of the locking hook. Figure 1 In the contact shown, the locking hook is composed of opposing teeth on the outer edge of the first leg, wherein the teeth engage in the receiving portion at the transition edge from the side 13 to the bottom 15 of the groove 12 in the mounting position of the contact. In particular, the locking hook constructed as teeth can cut into the material of the body 5 and lock in the material.
[0058] In a variation of the illustrated embodiment, the contact element is constructed as a flat metal blank, wherein the flat metal blank closes the opening in the bottom of the groove. The surface of the metal blank facing the groove forms a contact with the core wire, and the opposite surface of the metal blank, facing away from the groove, forms a contact surface with the conductor surface. The flat metal blank construction of the contact element particularly achieves a design scheme that incorporates a flat structure for the main body.
[0059] from Figure 5It can also be identified that the receiving part 11 is arranged substantially parallel to the contact surface 9 of the contact member 6, so that the cable 2 can be substantially welded in a position where it extends in a direction parallel to the conductor surface 7.
[0060] For the illustrated embodiment, Figure 5 It is also shown that the dimension of the extension of the corresponding support surface 24 of the main body 5 beyond the bottom surface 21 is designed such that the contact surface 9 of the contact member 6 is substantially flush with the extension of the plane of the support surface 24 of the main body 5 if necessary.
[0061] Beginning Figure 2 or Figure 5 As shown, the core wire 3 is housed in the groove 12, and molten solder is introduced into the groove 12. The solidified solder forms a conductive connection to the contact 6 and secures the core wire 3 inextricably in the groove 12 at the body 5 of the welding aid 4.
[0062] The side-open design of the groove 12 allows for simple contact between the core wire 3 and the solder, while the cable 2 is reliably and securely held in the through-hole 17. Furthermore, the side-open design of the groove 12 enables control over the solder covering of the core wire 3 and simplifies heat dissipation during solder cooling. Moreover, highly precise heat transfer of the solder in the liquefied groove 2 is feasible, allowing the soldering process to be performed with only a small heat load.
[0063] In addition to the above embodiments, it can also be proposed that the welding auxiliary component 4 includes a solder reservoir, which is specifically disposed in the region of the groove 12. In this case, it is no longer necessary to externally supply solder in order to secure the core wire 3 to the contact 6. The solder reservoir can be melted, for example, by a hot pin that engages the groove 12 which opens to one side.
[0064] In the above embodiment, the opening structure closed by the contact 6 at the bottom 15 of the groove 12 is a longitudinal cut that extends transversely to the longitudinal extension direction of the groove 12. In a variation of this embodiment, the opening structure is a longitudinal cut that extends at least partially along or parallel to the longitudinal extension direction of the groove 12. In another variation of the above embodiment, the opening structure at the bottom of the groove is a simple through-hole, and the contact has the form of a cylindrical or conical stud that closes the through-hole, wherein the end face of the stud forms an electrical contact of the core wire in the groove or a contact to the conductor surface.
[0065] In the above embodiment, it is proposed that the through-hole 17, comprising the sheath section of the cable with end stripping, is continuously formed along the entire circular cross-section, i.e., the sheath section is accommodated within the complete 360° cross-sectional profile of the through-hole 17. In a variation of the above embodiment, it can be proposed that although the sheath section is reliably accommodated within the through-hole 17, the cross-sectional profile of the through-hole 17 has an angle of only about 300° or greater. This variation is particularly well-constructed as a very flat structure.
[0066] In the above embodiments, the positioning aid 25, particularly the two studs 26, is constructed as a single piece with the rest of the main body 5, i.e., it is constructed as a molded part of the main body 5, wherein the studs 26 and the cantilever are manufactured as other molded parts during injection molding of the main body 5. In variations of the illustrated embodiments, it is proposed that the positioning aid 25, particularly the studs 26 protruding beyond the bottom surface 21, be manufactured separately from the main body and do not necessarily have to be made of the same material as the main body. In variations, it is proposed that the positioning aid, particularly the studs 26, be subsequently fixed in a drilled hole in the main body, or that it be fixed to the main body using a mechanical stress fixing mechanism by means of a clamp, hook, or similar object. In further variations, it is proposed that the positioning aid 25 be made of a material different from the main body material. For example, it is proposed that the positioning aid 25 be made of metal, and the main body be made of plastic or injection-moldable ceramic. As long as the positioning aid 25 includes studs 26, the studs can be made of metal, particularly a metal that can be used as solder when the welding aid must be fixed to the conductor surface by means of an additional welded connection.
[0067] The illustrations made with reference to the accompanying drawings should be understood as purely exemplary and not restrictive.
[0068] Reference number list
[0069] 1 component
[0070] 2 Cables
[0071] 3-core wire
[0072] 4 Welding auxiliary components
[0073] 5. Main body of welding auxiliary component 4
[0074] 6 Contacts
[0075] 7 Conductor Surface
[0076] 8. Contact surface (pad) of conductor surface 7
[0077] 9. Contact surface of contact element 6
[0078] 10 Composite parts
[0079] 11. Reception Department
[0080] 12 grooves
[0081] 13. Side of groove 12
[0082] 14. End face of groove 12
[0083] 15 Bottom of groove 12
[0084] 17 Through Holes
[0085] 17a First sub-section of the through hole
[0086] 17b Second sub-section of the through hole
[0087] 17c Third sub-section of the through hole
[0088] 18. Inlet of through hole 17
[0089] 19 Steps
[0090] 20 Output openings
[0091] 21 Bottom
[0092] 22a First molded part
[0093] 22b Second mold part
[0094] 23a First side view
[0095] 23b Second side view
[0096] 24 Support surface
[0097] 25 Positioning Auxiliary Components
[0098] 26. Bolts
[0099] 27. Positioning and receiving section.
Claims
1. A welding aid (4) for electrically connecting the core wire (3) of a cable (2) to a conductor surface (7), the welding aid comprising: A body (5) made of electrically insulating material and constructed as a single piece, and conductive contacts (6) housed within the body (5). The contact (6) has a contact surface (9) for electrically contacting the conductor surface (7). The main body (5) is equipped with a receiving portion (11), which has a groove (12) open to one side for receiving the core wire (3) of the cable (2), and the main body is equipped with a through hole (17) for surrounding the sheath section of the cable. The contact (6) closes the opening at the bottom (15) of the groove (12) and electrically contacts the core wire. Wherein, the through hole (17) has a diameter that tapers from the inlet (18) in at least the first sub-section of the through hole. Wherein, the through hole (17) has a smaller diameter than the diameter of the sheath section of the cable, at least in the second sub-section arranged along the cable introduction direction after the first sub-section, and The through hole (17) has a stepped portion (19) extending from the second sub-section to a third sub-section arranged along the introduction direction of the cable after the second sub-section.
2. The welding auxiliary component (4) according to claim 1, characterized in that, The receiving portion (11) is arranged parallel to the contact surface (9) of the contact member (6).
3. The welding auxiliary component (4) according to claim 1 or 2, characterized in that, The groove (12) is constructed as an open longitudinal groove pointing away from the contact surface (9).
4. The welding auxiliary component (4) according to claim 1 or 2, characterized in that, The opening at the bottom (15) of the groove (12) is constructed as a longitudinal cut.
5. The welding auxiliary component (4) according to claim 1 or 2, characterized in that, The contact element (6) is constructed as a profile-shaped slab blank.
6. The welding auxiliary component (4) according to claim 1 or 2, characterized in that, The contact element (6) has a U-shaped profile.
7. The welding auxiliary component (4) according to claim 1 or 2, characterized in that, The contact element (6) is constructed as a flat metal blank.
8. The welding auxiliary component (4) according to claim 1 or 2, characterized in that, The contact (6) has a locking hook, and the contact (6) is fixed in the body (5) by means of the locking hook.
9. The welding auxiliary component (4) according to claim 1 or 2, characterized in that, The main body (5) has a support surface (24), and the contact surface (9) of the contact member (6) is constructed flush with the support surface of the main body (5).
10. The welding auxiliary component (4) according to claim 1 or 2, characterized in that, The body (5) has a first height H in the region of the through hole (17) and a second height h in the region of the groove (12), and the first height H is greater than the second height h.
11. The welding auxiliary component (4) according to claim 1 or 2, characterized in that, The main body (5) is constructed as an injection molded part.
12. The welding auxiliary component (4) according to claim 1 or 2, characterized in that, The main body (5) is made of plastic.
13. The welding auxiliary component (4) according to claim 12, characterized in that, The main body (5) is composed of glass fiber reinforced polyphthalamide.
14. The welding auxiliary component (4) according to claim 1 or 2, characterized in that, The main body (5) has a positioning aid (25) that protrudes beyond the contact surface (9).
15. The welding auxiliary component (4) according to claim 1 or 2, characterized in that, The welding auxiliary components also include a solder bin.
16. The welding auxiliary component (4) according to claim 15, characterized in that, The solder bin is located in the area of the groove.
17. A composite (10) comprising at least one cable (2) having at least one core wire (3) and a welding aid (4) according to any one of claims 1 to 16.
18. The composite component according to claim 17, wherein, At least two core wires are accommodated in the welding aid (4).
19. A method for securing the core wire (3) of a cable (2) to a conductor surface (7), the method comprising the steps of: A composite (10) is constructed between the core wire (3) of the cable (2) and the welding aid (4) according to any one of claims 1 to 16, and The contact (6) of the welding auxiliary component (4) is fixed at the conductor surface (7).