Fastener systems and methods for joining multiple substrates of workpiece
Patent Information
- Application Number
- JP2024109960
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-07-19
- Filing Date
- 2024-07-09
- Publication Date
- 2025-02-19
Smart Images
Figure 2025023890000001_ABST
Abstract
Description
[Technical field]
[0001]
[0001] The present disclosure relates generally to fastening systems for joining multiple substrates of a workpiece, and more particularly to fastening systems that provide an interference fit with a workpiece including one or more composite substrates. The conductive properties of the various fastening systems provide protection from electromagnetic effects. Various configurations of the fastening system provide a mating barrel member that is pre-attached to the blind side of the workpiece and a bolt member for attachment to one side from the work side. [Background technology]
[0002]
[0002] Current bonded barrel fasteners are not utilized for interference fit installations and do not extend throughout the laminate of a workpiece. Furthermore, current bonded barrel fasteners would cause delamination and / or damage to the laminate if installed with an interference fit. Therefore, current bonded barrel fasteners are not suitable for electromagnetic energy protection of a workpiece.
[0003]
[0003] Accordingly, those skilled in the art continue to undertake research and development efforts to improve fastening systems for joining multiple substrates in a work piece. Summary of the Invention
[0004]
[0004] Disclosed are examples of fastening systems and methods for joining multiple substrates of a work piece. The following is a non-exhaustive list of examples of subject matter in accordance with the present disclosure, which may or may not be claimed.
[0005] In one example, a fastening system for joining multiple substrates of a workpiece is disclosed. The workpiece has a working side and a blind side. The fastening system includes a mating barrel member and a bolt member. The mating barrel member includes a cylindrical barrel body with a proximal end, a distal end, a central bore within the cylindrical barrel body, and a barrel flange adjacent the distal end of the body. The central bore includes a counterbored barrel portion and a threaded barrel portion with internal threads. The mating barrel member is configured to be inserted from the blind side of the workpiece into a mating bore through at least one substrate of the multiple substrates. The barrel flange is configured to limit further insertion of the mating barrel member into the mating bore. The cylindrical barrel body includes an outer barrel surface having a lubricating coating. The bolt member includes a head portion, a threaded bolt portion, and a shank portion extending between the head portion and the threaded bolt portion. The bolt member is configured to be inserted into the mating bores through the multiple substrates from a work side of the workpiece until a distal end of the bolt member contacts the mating barrel member. The threaded bolt portion is configured to threadably mate with the internal threads of the mating barrel member after contacting the mating barrel member. When the bolt member is fully engaged with the mating barrel member, the bolt member is configured to radially expand the mating barrel member, which is configured to provide an interference fit within the mating bores through the multiple substrates.
[0006] In one example, a method for joining multiple substrates of a workpiece is disclosed. The workpiece has a work side and a blind side. The method includes: (1) inserting a mating barrel member from the blind side of the workpiece into a mating bore through at least one substrate of the multiple substrates, the mating barrel member including a proximal end, a distal end, and a central bore within a cylindrical barrel body, the central bore including a counterbored barrel portion and a threaded barrel portion with internal threads, the mating barrel member also including a barrel flange adjacent the distal end of the cylindrical barrel body, the barrel flange configured to limit further insertion of the mating barrel member into the mating bore, the cylindrical barrel body also including an outer barrel surface having a lubricating coating thereon; and (2) inserting the mating barrel member until a distal end of a bolt member contacts the mating barrel member. (3) rotating the bolt member to engage the threaded bolt portion with internal threads of the coupling barrel member when the bolt member is fully engaged with the coupling barrel member; (4) radially expanding the coupling barrel member within the coupling bore through the multiple substrates when the bolt member is fully engaged with the coupling barrel member; and (5) providing an interference fit with the coupling barrel member within the coupling bore through the multiple substrates in response to the radial expansion of the coupling barrel member when the bolt member is fully engaged with the coupling barrel member. Includes.
[0007] In one example, another fastening system for joining multiple substrates of a workpiece is disclosed. The multiple substrates include at least one composite substrate. The workpiece has a working side and a blind side. The fastening system includes a mating barrel member, a cap closure member, and a bolt member. The mating barrel member includes a cylindrical barrel body with a proximal end, a distal end, and a central bore within the cylindrical barrel body, the cylindrical barrel body including an internal thread and a barrel flange adjacent the distal end of the cylindrical barrel body. The central bore includes a counterbored barrel portion and a threaded barrel portion including an internal thread. The mating barrel member is configured to be inserted from the blind side of the workpiece into a mating bore through at least one substrate of the multiple substrates. The barrel flange is configured to limit further insertion of the mating barrel member into the mating bore. The cylindrical barrel body includes an outer barrel surface having a lubricating coating. The cap closure member includes a dome portion and a cap flange. The cap closure member is configured to be positioned over the mating barrel member. The cap flange is configured to secure the cap closure member to the blind side of the workpiece. The bolt member includes a head portion, a threaded bolt portion, and a shank portion extending between the head portion and the threaded bolt portion. The bolt member is configured to be inserted into a mating bore through the plurality of substrates from a work side of the workpiece until a distal end of the bolt member contacts the mating barrel member. The threaded bolt portion is configured to threadably mate with the internal threads of the mating barrel member after contacting the mating barrel member. At least one of i) and ii) below. i) an outer thread diameter of the threaded bolt portion of the bolt member is substantially larger than an inner thread diameter of the threaded barrel portion of the mating barrel member, and ii) an outer shank diameter of the shank portion of the bolt member is substantially larger than an inner counterbored diameter of the counterbored barrel portion of the mating barrel member. The bolt member is configured to radially expand the mating barrel member when the bolt member becomes fully engaged with the mating barrel member, and the mating barrel member is configured to provide an interference fit within the mating bores through the multiple substrates.
[0008] Other examples of the disclosed fastening systems and methods for joining multiple substrates in a workpiece will be apparent from the ensuing detailed description, the accompanying drawings, and the appended claims. [Brief description of the drawings]
[0009] [Figure 1]
[0009] FIG. 1 is a side cross-sectional view of an example of a partially installed fastening system for joining multiple substrates of a workpiece. [Figure 2A]
[0010] FIG. 2 is a cross-sectional view of an example of a coupling barrel member of the fastening system of FIG. 1 installed into a substrate of a workpiece from the blind side. [Figure 2B]
[0011] FIG. 2B is a cross-sectional view of the example partially installed mating barrel member of FIG. 2A prepared for attachment of a workpiece substrate from the working side. [Figure 2C]
[0012] FIG. 2 is a side cross-sectional view of the fastening system of FIG. 1, with the fastening system fully installed. [Diagram 3]
[0013] 1A-C are side cross-sectional views of example countersunk, counterbored and cylindrical joining bores in a workpiece having multiple substrates. [Figure 4]
[0014] FIG. 1 is a flow diagram of an example method for bonding multiple substrates of a work piece. [Diagram 5]
[0015] FIG. 5 is a flow diagram showing a further example of “inserting a coupled barrel member” from the method of FIG. 4 . [Figure 6]
[0016] FIG. 5 is a flow diagram illustrating another further example of “inserting a mating barrel member” from the method of FIG. 4 . [Figure 7]
[0017] FIG. 5 is a flow diagram of another example method for bonding multiple substrates of a work piece in combination with FIG. 4 . [Figure 8]
[0018] FIG. 5 is a flow diagram showing a further example of “inserting a coupled barrel member” from the method of FIG. 4 . [Figure 9]
[0019] 5 is a flow diagram illustrating a further example of "rotating the bolt member" from the method of FIG. 4. [Figure 10]
[0020] FIG. 5 is a flow diagram of yet another example method for bonding multiple substrates of a work piece in combination with FIG. 4 . [Figure 11]
[0021] 5 is a flow diagram illustrating further examples of "radially expanding" and "providing an interference fit" from the method of FIG. 4. [Figure 12]
[0022] 5 is a flow diagram illustrating yet further examples of "radially expanding" and "providing an interference fit" from the method of FIG. 4. [Figure 13]
[0023] FIG. 1 is a block diagram of an aircraft manufacturing and service method implementing one or more of the example methods for bonding multiple substrates of a workpiece disclosed herein. [Figure 14]
[0024] FIG. 1 is a schematic diagram of an aircraft including a workpiece including multiple substrates joined using one or more of the example fastening systems and methods for joining multiple substrates of a workpiece disclosed herein. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0010]
[0025] Various examples of fastening systems and methods for joining multiple substrates of a workpiece disclosed herein provide techniques for pre-installing a mating barrel member of the fastening system on the blind side of the workpiece and installing a bolt member of the fastening system on one side from the work side of the workpiece. The workpiece may include, for example, one or more composite substrates and be used in aerospace construction.
[0011]
[0026] Generally, and by way of example, referring to FIGS. 1, 2A-C, and 3A-C, the present disclosure is directed to a fastening system 100 for joining multiple substrates 102 of a workpiece 104. The workpiece 104 has a working side 106 and a blind side 108. FIG. 1 discloses a partially installed example of the fastening system 100. FIG. 2A discloses an example of a mating barrel member 110 installed in a substrate of the workpiece from the blind side 108. FIG. 2B discloses an example of a mating barrel member 110 prepared for mounting a substrate of the workpiece from the working side 106. FIG. 2C discloses an example of a fully installed fastening system 100. FIGS. 3A-C show an example of a mating bore 128 in the workpiece 104 of FIG. 1 with a countersunk portion 302, a counterbored portion 304, and a cylindrical portion 306.
[0012]
[0027] 1 , 2A-C, and 3A-C, in one or more examples, a fastening system 100 for joining a plurality of substrates 102 of a workpiece 104 includes a mating barrel member 110 and a bolt member 130. The workpiece 104 has a working side 106 and a blind side 108. The mating barrel member 110 includes a cylindrical barrel body 112 with a proximal end 114, a distal end 116, a central bore 118 within the cylindrical barrel body 112, and a barrel flange 122 adjacent the distal end 116 of the cylindrical barrel body 112. The central bore 118 includes a counterbored barrel portion 119 and a threaded barrel portion 120 with internal threads 121. The mating barrel member 110 is configured to be inserted from the blind side 108 of the workpiece 104 into a mating bore 128 through at least one substrate 202 of the plurality of substrates 102. The barrel flange 122 is configured to limit further insertion of the mating barrel member 110 into the mating bore 128. The cylindrical barrel body 112 includes an outer barrel surface 124 having a lubricous coating 126. The bolt member 130 includes a head portion 132, a threaded bolt portion 134, and a shank portion 135 extending between the head portion 132 and the threaded bolt portion 134. The bolt member 130 is configured to be inserted into the mating bore 128 through the plurality of substrates 102 from the work side 106 of the workpiece 104 until a distal end 136 of the bolt member 130 contacts the mating barrel member 110. The threaded bolt portion 134 is configured to threadably mate with the internal threads 121 of the mating barrel member 110 after contacting the mating barrel member 110. When the bolt member 130 is fully engaged with the mating barrel member 110, the bolt member 130 is configured to radially expand the mating barrel member 110, which is configured to provide an interference fit 206 within the mating bores 128 through the multiple substrates 102.
[0013]
[0028] In another example of the fastening system 100 , the plurality of substrates 102 includes at least one composite substrate 138 .
[0014]
[0029] In yet another example of the fastening system 100, the coupling barrel member 110 is configured to be press-fit into the interface bore 128 through at least one substrate 202 of the plurality of substrates 102 from the blind side 108 of the workpiece 104. If the coupling barrel member 110 is not press-fit into the interface bore 128 through one or more substrates 204 of the plurality of substrates 102, the coupling barrel member 110 press-fit into the interface bore 128 of the at least one substrate 202 is configured to receive one or more substrates 204 via the interface bore 128 through the one or more substrates 204 from the working side 106 of the workpiece 104.
[0015]
[0030] In yet another example of the fastening system 100, the coupling barrel member 110 is configured to be inserted into the interface bore 128 through at least one substrate 202 of the plurality of substrates 102 from the blind side 108 of the workpiece 104 and retracted into the remainder of the interface bore 128 from the working side 106 of the workpiece 104 using an insertion tool configured to engage the coupling barrel member 110 and disengage after the barrel flange 122 reaches the blind side 108 of the workpiece 104. In a further example, when the coupling barrel member 110 is not inserted into the interface bore 128 through one or more substrates 204 of the plurality of substrates 102, the coupling barrel member 110 inserted into the interface bore 128 of the at least one substrate 202 is configured to receive one or more substrates 204 via the interface bore 128 through the one or more substrates 204 from the working side 106 of the workpiece 104.
[0016]
[0031] In yet another example, the fastening system 100 also includes a cap closure member 208 having a dome portion 210 and a cap flange 212. The cap closure member 208 is configured to be positioned over the mating barrel member 110. The cap flange 212 is configured to secure the cap closure member 208 to the blind side 108 of the workpiece 104.
[0017]
[0032] In another example of the fastening system 100, the coupling barrel member 110 includes a metallic material. In a further example, the metallic material includes stainless steel, titanium, a titanium alloy, a cobalt chromium alloy, a nickel titanium alloy, or any other suitable metallic material in any suitable combination.
[0018]
[0033] In yet another example of the fastening system 100, the lubricious coating 126 includes indium, an indium alloy, tin, a tin alloy, bismuth, a bismuth alloy, aluminum, an aluminum alloy, or any other suitable lubricious coating in any suitable combination.
[0019]
[0034] In yet another example of the fastening system 100, the lubricous coating 126 on the outer barrel surface 124 includes conductive features configured to provide electromagnetic energy protection to the workpiece 104 when the bolt member 130 becomes fully engaged with the mating barrel member 110.
[0020]
[0035] In yet another example of the fastening system 100, the outer barrel surface 124 is coated with a conductive coating 140 to provide electromagnetic energy protection to the workpiece 104 when the bolt member 130 is fully engaged with the mating barrel member 110. In a further example, the conductive coating 140 includes indium, indium alloy, tin, tin alloy, lead, lead alloy, or any other suitable conductive coating in any suitable combination.
[0021]
[0036] In another example of the fastening system 100, the bolt member 130 includes a metallic material. In a further example, the metallic material includes stainless steel, titanium, a titanium alloy, a cobalt chromium alloy, a nickel titanium alloy, or any other suitable metallic material in any suitable combination.
[0022]
[0037] In yet another example of the fastening system 100, the head portion 132 of the bolt member 130 includes a torque feature 142. In a further example, the torque feature 142 is configured to facilitate rotation of the bolt member 130 using a hex key torque tool, a cross tip driver torque tool, a flat tip driver torque tool, a hex socket torque tool, or any other suitable torque tool.
[0023]
[0038] In yet another example of the fastening system 100, the head portion 132 of the bolt member 130 includes a protruding head, a flat head, a countersunk head, a raised head, a recessed hexagonal socket head, a recessed cross tip head, a recessed flat tip head, a hexagonal head, or any other suitable type of head.
[0024]
[0039] In yet another example of the fastening system 100, the interface bore 128 through the multiple substrates 102 on the work side 106 of the workpiece 104 includes a countersunk portion 302, a counterbored portion 304, a cylindrical portion 306, or any other suitable shape on the work side 106 that is compatible with the head portion 132 of the bolt member 130.
[0025]
[0040] In another example of the fastening system 100, the coupling barrel member 110 also includes an inner counterbored surface 216 of the counterbored barrel portion 119. In this example, the bolt member 130 also includes an outer shank surface 144 of the shank portion 135. At least one of the inner counterbored surface 216 and the outer shank surface 144 is coated with a lubricious coating 126.
[0026]
[0041] In yet another example of the fastening system 100, the coupling barrel member 110 also includes an inner thread surface 218 of the threaded barrel portion 120. In this example, the bolt member 130 also includes an outer thread surface 146 of the threaded bolt portion 134. At least one of the inner thread surface 218 and the outer thread surface 146 is coated with a lubricious coating 126.
[0027]
[0042] In yet another example of the fastening system 100, the outer thread diameter of the threaded bolt portion 134 of the bolt member 130 is substantially larger than the inner thread diameter of the threaded barrel portion 120 of the mating barrel member 110. In a further example, the outer thread diameter is substantially larger than the inner thread diameter by about 0.0005 inches, about 0.0010 inches, about 0.0015 inches, about 0.0020 inches, about 0.0025 inches, or any suitable variety of measurements that substantially expand the mating barrel member 110. In another further example, the outer thread diameter is substantially larger than the inner thread diameter by about 0.2 percent, about 0.4 percent, about 0.6 percent, about 0.8 percent, about 1.0 percent, or any other suitable percentage that substantially expands the mating barrel member 110.
[0028]
[0043] In yet another example of the fastening system 100, an outer shank diameter of the shank portion 135 of the bolt member 130 is substantially larger than an inner counterbored diameter of the counterbored barrel portion 119 of the mating barrel member 110. In a further example, the outer shank diameter is substantially larger than the inner counterbored diameter by about 0.0005 inches, about 0.0010 inches, about 0.0015 inches, about 0.0020 inches, about 0.0025 inches, or any suitable variety of measurements that substantially expand the mating barrel member 110. In another further example, the outer shank diameter is substantially larger than the inner counterbored diameter by about 0.2 percent, about 0.4 percent, about 0.6 percent, about 0.8 percent, about 1.0 percent, or any other suitable percentage that substantially expands the mating barrel member 110.
[0029]
[0044] In another example of the fastening system 100, the threaded bolt portion 134 of the bolt member 130 includes a cylindrical threaded body 145 including an outer threaded surface 146 configured to face the internal threads 121 of the cylindrical barrel body 112 when the bolt member 130 is inserted into the central bore 118 and engages with the internal threads 121 of the threaded barrel portion 120 of the connecting barrel member 110.
[0030]
[0045] In a further example, the outer thread diameter of the threaded cylindrical body 145 is substantially larger than the inner thread diameter of the internal threads 121 of the threaded barrel portion 120. In yet another example, the outer thread diameter is substantially larger than the inner thread diameter by about 0.0005 inches, about 0.0010 inches, about 0.0015 inches, about 0.0020 inches, about 0.0025 inches, or any suitable variety of measurements that substantially expand the mating barrel member 110. In another further example, the outer thread diameter is substantially larger than the inner thread diameter by about 0.2 percent, about 0.4 percent, about 0.6 percent, about 0.8 percent, about 1.0 percent, or any other suitable percentage that substantially expands the mating barrel member 110.
[0031]
[0046] In another further example, when the bolt member 130 is fully engaged with the mating barrel member 110, the outer thread surface 146 of the bolt member 130 is configured to radially expand the threaded barrel portion 120 of the mating barrel member 110, which in combination with a corresponding cylindrical shape of the mating bore 128 is configured to provide an interference fit 206 within the mating bore 128 through the multiple substrates 102.
[0032]
[0047] In yet another example of the fastening system 100, the shank portion 135 of the bolt member 130 includes a cylindrical shank body 143 including an outer shank surface 144 configured to face the counterbored barrel portion 119 of the combining barrel member 110 when the bolt member 130 is inserted into the central bore 118 and engages the internal threads 121 of the threaded barrel portion 120 of the combining barrel member 110.
[0033]
[0048] In a further example, the outer shank diameter of the cylindrical shank body 143 is substantially larger than the inner counterbored diameter of the counterbored barrel portion 119 of the mating barrel member 110. In yet another example, the outer shank diameter is substantially larger than the inner counterbored diameter by about 0.0005 inches, about 0.0010 inches, about 0.0015 inches, about 0.0020 inches, about 0.0025 inches, or any suitable variety of measurements that substantially expand the mating barrel member 110. In another further example, the outer shank diameter is substantially larger than the inner counterbored diameter by about 0.2 percent, about 0.4 percent, about 0.6 percent, about 0.8 percent, about 1.0 percent, or any other suitable percentage that substantially expands the mating barrel member 110.
[0034]
[0049] In another further example, when the bolt member 130 is fully engaged with the mating barrel member 110, the outer shank surface 144 of the bolt member 130 is configured to radially expand the counterbored barrel portion 119 of the mating barrel member 110 which, in combination with a corresponding cylindrical shape of the mating bore 128, is configured to provide an interference fit 206 within the mating bores 128 through the multiple substrates 102.
[0035]
[0050] Generally, with reference to, by way of example, FIGS. 1, 2A-C, and 4-13, the present disclosure is directed to methods 400, 700, 1000 for joining multiple substrates 102 of a workpiece 104. The workpiece 104 has a working side 106 and a blind side 108. FIG. 1 discloses a partially installed example of a fastening system 100. FIG. 2A discloses an example of a coupling barrel member 110 installed in a substrate of the workpiece from the blind side 108. FIG. 2B discloses an example of a coupling barrel member 110 prepared for mounting a substrate of the workpiece from the working side 106. FIG. 2C discloses an example of a fully installed fastening system 100. FIGS. 4-6, 8, 9, 11, and 12 disclose several examples of the method 400. FIGS. 4 and 7 disclose several examples of the method 700. FIGS. 4 and 10 disclose several examples of the method 1000.
[0036]
[0051] 1, 2A-C, 4-6, 8, 9, 11, and 12, in one or more examples, a method 400 (see FIG. 4) for joining a plurality of substrates 102 of a workpiece 104 including a working side 106 and a blind side 108 includes inserting 402 a mating barrel member 110 into a mating bore 128 through at least one substrate 202 of the plurality of substrates 102 from the blind side 108 of the workpiece 104. The mating barrel member 110 includes a cylindrical barrel body 112 having a proximal end 114, a distal end 116, and a central bore 118 within the cylindrical barrel body 112. The central bore 118 includes a counterbored barrel portion 119 and a threaded barrel portion 120 with internal threads 121. The mating barrel member 110 also includes a barrel flange 122 adjacent the distal end 116 of the cylindrical barrel body 112. The barrel flange 122 is configured to limit further insertion of the combined barrel member 110 into the mating bore 128. The cylindrical barrel body 112 also includes an outer barrel surface 124 having a lubricous coating 126. At 404, the bolt member 130 is inserted into the mating bore 128 from the work side 106 of the workpiece 104 through the plurality of substrates 102 until a distal end 136 of the bolt member 130 contacts the combined barrel member 110. The bolt member 130 includes a head portion 132, a threaded bolt portion 134, and a shank portion 135 extending between the head portion 132 and the threaded bolt portion 134. At 406, the bolt member 130 is rotated to engage the threaded bolt portion 134 with the internal threads 121 of the combined barrel member 110. At 408, the mating barrel member 110 is radially expanded within the mating bore 128 through the multiple substrates 102 as the bolt member 130 fully engages the mating barrel member 110. At 410, as the bolt member 130 fully engages the mating barrel member 110, an interference fit 206 is provided to the mating barrel member 110 within the mating bore 128 through the multiple substrates 102 in response to radially expanding the mating barrel member 110.
[0037]
[0052] In another example of the method 400, inserting 402 the coupling barrel member 110 includes press-fitting 502 (see FIG. 5 ) the coupling barrel member 110 into the interface bore 128 through at least one substrate 202 of the plurality of substrates 102 from the blind side 108 of the workpiece 104. In a further example, if the coupling barrel member 110 is not press-fit into the interface bore 128 through one or more substrates 204 of the plurality of substrates 102, inserting 402 the coupling barrel member 110 also includes receiving 504 the one or more substrates 204 in the coupling barrel member 110 that is press-fit into the interface bore 128 of the at least one substrate 202 via the interface bore 128 through the one or more substrates 204 from the working side 106 of the workpiece 104.
[0038]
[0053] In yet another example of the method 400, inserting 402 the coupled barrel member 110 includes inserting 602 (see FIG. 6 ) the coupled barrel member 110 from the blind side 108 of the workpiece 104 into the interface bore 128 through at least one substrate 202 of the plurality of substrates 102. At 604, the coupled barrel member 110 is pulled from the working side 106 of the workpiece 104 into the remainder of the interface bore 128 using an insertion tool configured to be engaged with the coupled barrel member 110 and configured to be disengaged after the barrel flange 122 reaches the blind side 108 of the workpiece 104. In a further example, if the coupling barrel member 110 is not inserted into a mating bore 128 through one or more substrates 204 of the plurality of substrates 102, inserting 402 the coupling barrel member 110 also includes receiving 606 one or more substrates 204 in the coupling barrel member 110 that is inserted into the mating bore 128 of at least one substrate 202 via the mating bore 128 through the one or more substrates 204 from the working side 106 of the workpiece 104.
[0039]
[0054] 1, 2A-C, 4, and 7, in one or more examples, a method 700 (see FIG. 7) for joining multiple substrates 102 of a workpiece 104 includes the method 400 of FIG. 4 and continues from 402 to 702, where at 702, a cap closure member 208 is positioned over a mating barrel member 110. The cap closure member 208 includes a dome portion 210 and a cap flange 212. The cap flange 212 is configured to secure the cap closure member 208 to the blind side 108 of the workpiece 104. In another example, the method 700 includes applying 704 a lubricious coating 126 to an outer barrel surface 124 of the mating barrel member 110. In this example, the method 700 continues from 704 to 402 of FIG. In a further example of method 700, the lubricious coating 126 on the outer barrel surface 124 includes conductive features configured to provide electromagnetic energy protection to the workpiece 104 when the bolt member 130 becomes fully engaged with the mating barrel member 110. In yet another example, the method 700 includes applying 706 a conductive coating 140 to the outer barrel surface 124. In this example, the method 700 continues from 706 to 402 of FIG.
[0040]
[0055] 1, 2A-C, 4-6, 8, 9, 11 and 12, in yet another example of the method 400, inserting 402 the coupled barrel member 110 includes limiting 802 further insertion of the coupled barrel member 110 into the interface bores 128 through the plurality of substrates 102 based on the barrel flange 122 at the distal end 116 of the coupled barrel member 110.
[0041]
[0056] In yet another example of the method 400 , rotating 406 the bolt member 130 includes tightening 902 the bolt member 130 into full engagement with the mating barrel member 110 .
[0042]
[0057] 1, 2A-C, 4, and 10, in one or more examples, a method 1000 (see FIG. 10) for joining multiple substrates 102 of a workpiece 104 includes the method 400 of FIG. 4 and continues from 402 to 1002. At 1002, a lubricating coating 126 is applied to at least one of the inner counterbored surface 216 of the counterbored barrel portion 119 of the mating barrel member 110 and the outer shank surface 144 of the shank portion 135 of the bolt member 130. In this example, the method 1000 continues from 1002 to 404 of FIG. 4. In another example of the method 1000, the outer shank diameter of the shank portion 135 of the bolt member 130 is substantially larger than the inner counterbored diameter of the counterbored barrel portion 119 of the mating barrel member 110. In yet another example, the method 1000 continues from 402 to 1004, where at 1004, the lubricous coating 126 is applied to at least one of the inner thread surface 218 of the threaded barrel portion 120 of the combined barrel member 110 and the outer thread surface 146 of the threaded bolt portion 134 of the bolt member 130. In yet another example of the method 1000, the outer thread diameter of the threaded bolt portion 134 of the bolt member 130 is substantially larger than the inner thread diameter of the threaded barrel portion 120 of the combined barrel member 110.
[0043]
[0058] 1, 2A-C, 4-6, 8, 9, 11 and 12, in another example of the method 400, the threaded bolt portion 134 of the bolt member 130 includes a cylindrical threaded body 145 including an outer thread surface 146 configured to face the internal threads 121 of the cylindrical barrel body 112 when the bolt member 130 is inserted into the central bore 118 and engages the internal threads 121 of the threaded barrel portion 120 of the mating barrel member 110. In a further example, the outer thread diameter of the cylindrical threaded body 145 is substantially larger than the inner thread diameter of the internal threads 121 of the threaded barrel portion 120. In another further example of the method 400, the radially expanding 408 includes radially expanding 1102 (see FIG. 11) the threaded barrel portion 120 of the mating barrel member 110 when the bolt member 130 becomes fully engaged with the mating barrel member 110. In this example, providing 410 the interference fit 206 includes providing 1104 the interference fit 206 within the mating bores 128 through the multiple substrates 102 in combination with a corresponding cylindrical shape of the mating bores 128 when the bolt member 130 becomes fully engaged with the mating barrel member 110.
[0044]
[0059] In yet another example of the method 400, the shank portion 135 of the bolt member 130 includes a cylindrical shank body 143 having an outer shank surface 144 configured to face the counterbored barrel portion 119 of the mating barrel member 110 when the bolt member 130 is inserted into the central bore 118 and engages the internal threads 121 of the threaded barrel portion 120 of the mating barrel member 110. In a further example, the outer shank diameter of the cylindrical shank body 143 is substantially larger than an inner counterbored diameter of the counterbored barrel portion 119 of the mating barrel member 110. In another further example of the method 400, the radially expanding 408 includes radially expanding 1202 (see FIG. 12 ) the counterbored barrel portion 119 of the mating barrel member 110 when the bolt member 130 becomes fully engaged with the mating barrel member 110. In this example, providing 410 the interference fit 206 includes providing 1204 the interference fit 206 within the mating bores 128 through the multiple substrates 102 in combination with a corresponding cylindrical shape of the mating bores 128 when the bolt member 130 becomes fully engaged with the mating barrel member 110.
[0045]
[0060] Referring generally to Figures 1 and 2A-C, by way of example, the present disclosure is directed to a fastening system 100 for joining multiple substrates 102 of a workpiece 104. The workpiece 104 has a working side 106 and a blind side 108. Figure 1 discloses a partially installed example of the fastening system 100. Figure 2A discloses an example of a mating barrel member 110 installed within the substrates of the workpiece from the blind side 108. Figure 2B discloses an example of a mating barrel member 110 prepared for mounting a substrate of the workpiece from the working side 106. Figure 2C discloses an example of a fully installed fastening system 100.
[0046]
[0061] 1 and 2A-C, in one or more examples, a fastening system 100 for joining multiple substrates 102 of a workpiece 104 includes a mating barrel member 110, a cap closure member 208, and a bolt member 130. The workpiece 104 has a working side 106 and a blind side 108. The mating barrel member 110 includes a cylindrical barrel body 112 with a proximal end 114, a distal end 116, a central bore 118 within the cylindrical barrel body 112 including internal threads 121, and a barrel flange 122 adjacent the distal end 116 of the cylindrical barrel body 112. The central bore 118 includes a counterbored barrel portion 119 and a threaded barrel portion 120 with internal threads 121. The combined barrel member 110 is configured to be inserted into a mating bore 128 through at least one substrate 202 of the plurality of substrates 102 from the blind side 108 of the workpiece 104. The barrel flange 122 is configured to limit further insertion of the combined barrel member 110 into the mating bore 128. The cylindrical barrel body 112 includes an outer barrel surface 124 having a lubricious coating 126. The cap closure member 208 includes a dome portion 210 and a cap flange 212. The cap closure member 208 is configured to be positioned over the combined barrel member 110. The cap flange 212 is configured to secure the cap closure member 208 to the blind side 108 of the workpiece 104. The bolt member 130 includes a head portion 132, a threaded bolt portion 134, and a shank portion 135 extending between the head portion 132 and the threaded bolt portion 134. The bolt member 130 is configured to be inserted into the mating bores 128 through the plurality of substrates 102 from the work side 106 of the workpiece 104 until a distal end 136 of the bolt member 130 contacts the mating barrel member 110. The threaded bolt portion 134 is configured to threadably mate with the internal threads 121 of the mating barrel member 110 after contacting the mating barrel member 110. At least one of i) and ii) below: i) an outer thread diameter of the threaded bolt portion 134 of the bolt member 130 is substantially larger than an inner thread diameter of the threaded barrel portion 120 of the mating barrel member 110;ii) an outer shank diameter of the shank portion 135 of the bolt member 130 is substantially larger than an inner counterbored diameter of the counterbored barrel portion 119 of the mating barrel member 110. When the bolt member 130 becomes fully engaged with the mating barrel member 110, the bolt member 130 is configured to radially expand the mating barrel member 110, which is configured to provide an interference fit 206 within the interface bores 128 through the multiple substrates 102.
[0047]
[0062] The example fastening systems 100 and methods 400, 700, 1000 for joining multiple substrates of a workpiece may be related to or used in conjunction with aircraft manufacturing. Although an aircraft example is shown, the embodiments and principles disclosed herein may also be applied to other products in the aerospace and other industries, including automotive, space, building, and other design and manufacturing industries. Thus, in addition to aircraft, the embodiments and principles disclosed herein may be applied to the use of composite products in the manufacture of various types of vehicles and in the construction of various types of buildings.
[0048]
[0063] The foregoing detailed description refers to the accompanying drawings, which illustrate specific embodiments described by the present disclosure. Other embodiments having different structures and steps do not depart from the scope of the present disclosure. Similar reference numbers may represent the same features, elements, or components in the various drawings. Throughout this disclosure, any of a plurality of items may be individually referred to as that item, and a plurality of items may be collectively referred to as items (plural) and may be represented by similar reference numbers. Furthermore, in this specification, a feature, element, component, or step following the term "a" or "an" is to be understood as not excluding a plurality of features, elements, components, or steps, unless expressly stated to exclude it.
[0049]
[0064] Illustrative, non-exhaustive examples of the inventive subject matter according to the present disclosure may be, but are not necessarily, claimed. Reference herein to an "example" means that one or more features, structures, elements, components, properties, and / or operational steps described in connection with the example are included in at least one aspect, embodiment, and / or realization of the inventive subject matter according to the present disclosure. Thus, the phrases "an example," "another example," "one or more examples," and similar phrases used throughout this disclosure may, but do not necessarily, refer to the same example. Furthermore, the inventive subject matter characterizing any one example may, but does not necessarily, include the inventive subject matter characterizing any other example. Furthermore, the inventive subject matter characterizing any one example may, but does not necessarily, be combined with the inventive subject matter characterizing any other example.
[0050]
[0065] As used herein, a system, apparatus, device, structure, article, element, component, or hardware that is "configured to" perform a particular function is in fact capable of performing that particular function without any modification, rather than merely having the potential to perform that particular function after further modification. In other words, a system, apparatus, device, structure, article, element, component, or hardware that is "configured to" perform a particular function is specifically selected, created, implemented, utilized, programmed, and / or designed for the purpose of performing that particular function. As used herein, the phrase "configured to" refers to existing characteristics of a system, apparatus, structure, article, element, component, or hardware that enable the system, apparatus, structure, article, element, component, or hardware to perform a particular function without further modification. For purposes of this disclosure, a system, apparatus, device, structure, article, element, component, or hardware described as being "configured to" perform a particular function may additionally or alternatively be described as being "adapted to" and / or "operative to" perform that function.
[0051]
[0066] Unless otherwise indicated, the terms "first," "second," "third," etc. are used herein merely as labels and are not intended to impose any sequential, positional, or hierarchical requirements on the items to which they refer. Moreover, reference to, e.g., a "second" item does not require or preclude the presence of, e.g., a "first" or lower numbered item and / or, e.g., a "third" or higher numbered item.
[0052]
[0067] As used herein, the phrase "at least one of" used in conjunction with listed items means that various combinations of one or more of the listed items may be utilized and that only one of the listed items may be required. For example, "at least one of item A, item B, and item C" may include, but is not limited to, "item A" or "item A and item B." This example may also include item A, item B, and item C, or item B and item C. In other examples, "at least one of" may be, for example, but is not limited to, "2 item A, 1 item B, and 10 item C," "4 item B, and 7 item C," and other suitable combinations. As used herein, the phrase "and / or" and the indicia " / " include any and all combinations of one or more of the associated listed items.
[0053]
[0068] As used herein, the terms "coupled," "coupling," and similar terms refer to two or more elements that are coupled, joined, fastened, attached, connected, in communication with, or otherwise associated (e.g., mechanically, electrically, fluidly, optically, electromagnetically) with one another. In various embodiments, these elements may be directly or indirectly associated. For example, element A may be directly associated with element B. As another example, element A may be associated with element B, e.g., through another element C. It should be understood that not all relationships between the various disclosed elements are necessarily depicted. Thus, other connections than those shown in the figures may exist.
[0054]
[0069] As used herein, the term "approximately" refers to or describes a condition that is close to, but not exactly, a specified condition that still performs a desired function or achieves a desired result. As an example, the term "about" refers to a condition that is within an acceptable, predetermined tolerance or precision, such as within 10% of a specified condition. However, the term "about" does not exclude a condition that is exactly the specified condition. As used herein, the term "substantially" refers to a condition that is essentially a specified condition that performs a desired function or achieves a desired result.
[0055]
[0070] The above-mentioned FIGS. 1, 2A-C, and 3A-C may represent functional elements, features, or components thereof, and do not necessarily suggest any particular structure. Thus, modifications, additions, and / or omissions may be made to the illustrated structures. Furthermore, those skilled in the art will appreciate that not all elements, features, and / or components described and illustrated in the above-mentioned FIGS. 1, 2A-C, and 3A-C need to be included in every embodiment, and not all elements, features, and / or components described herein are necessarily shown in each illustrative embodiment. Thus, some of the features and / or components described and illustrated in FIGS. 1, 2A-C, and 3A-C may be combined in various ways without the need to include other features described and illustrated in FIGS. 1, 2A-C, and 3A-C, other figures, and / or the accompanying disclosure, although such combinations are not expressly shown herein. Similarly, additional features not limited to the embodiments presented may be combined with some or all of the features illustrated and described herein. Unless expressly stated otherwise, the schematic diagrams of the embodiments shown in FIGS. 1, 2A-C, and 3A-C above do not imply structural limitations on the exemplary embodiments. Rather, it is to be understood that although one exemplary structure is shown, the structure may be modified as necessary. Thus, modifications, additions, and / or omissions may be made to the illustrated structure. Furthermore, elements, features, and / or components that serve similar or at least substantially similar purposes are labeled with similar reference numerals in each of FIGS. 1, 2A-C, and 3A-C, and such elements, features, and / or components may not be described in detail herein when referring to each of FIGS. 1, 2A-C, and 3A-C. Similarly, not all elements, features, and / or components are labeled with reference numerals in each of FIGS. 1, 2A-C, and 3A-C, but the reference numerals associated therewith may be used consistently herein.
[0056]
[0071] In the above-referenced Figures 4-12, the blocks may represent operations, steps, and / or portions thereof, and the lines connecting the various blocks do not imply any particular order or dependency of the operations or portions thereof. It should be understood that not all dependencies between the various disclosed operations are necessarily depicted. Figures 4-12 and the accompanying disclosure describing the operations of the disclosed method described herein should not be construed as necessarily dictating the sequence in which the operations are performed. Rather, it should be understood that even if one exemplary order is shown, the sequence of operations may be changed where appropriate. Thus, modifications, additions, and / or omissions may be made to the illustrated operations, and certain operations may be performed in a different order or simultaneously. Moreover, one skilled in the art will appreciate that it is not necessary to perform all of the operations described.
[0057]
[0072] Furthermore, references to features, advantages, or similar language used throughout this specification do not imply that all features and advantages that may be realized by the embodiments disclosed herein should or will be present in any single embodiment. Rather, language referring to features and advantages is understood to mean that the particular feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment. Thus, references to features, advantages, and similar language used throughout this disclosure may, but do not necessarily, refer to the same embodiment.
[0058]
[0073] Examples of the subject matter disclosed herein may be described with reference to an aircraft manufacturing and service method 1300, illustrated in FIG. 13, and an aircraft 1400, illustrated in FIG. 14. In one or more embodiments, the disclosed methods and systems for relating test data of a part under test to a coordinate system of an end product may be used in the manufacture of an aircraft. During the pre-production phase, the service method 1300 may include specification and design of the aircraft 1400 (block 1302) and material procurement (block 1304). During the production phase, the manufacture of components and subassemblies of the aircraft 1400 (block 1306) and system integration (block 1308) may occur. The aircraft 1400 may then undergo certification and delivery (block 1310) and be placed into service (block 1312). During its operational life, the aircraft 1400 may be scheduled for routine maintenance and service (block 1314). The routine maintenance and service may include modification, reconfiguration, refurbishment, etc. of one or more systems of the aircraft 1400.
[0059]
[0074] Each of the processes of maintenance method 1300 may be performed or implemented by a system integrator, a third party, and / or an operator (e.g., a customer). For purposes of this specification, a system integrator includes, but is not limited to, any number of aircraft manufacturers and major system subcontractors, a third party includes, but is not limited to, any number of vendors, subcontractors, and suppliers, and an operator may be an airline, a leasing company, a military entity, a service organization, etc.
[0060]
[0075] As shown in FIG. 14 , an aircraft 1400 produced by the maintenance method 1300 may include an airframe 1402 having a number of high-level systems 1404 and an interior 1406. Examples of high-level systems 1404 include one or more of a propulsion system 1408, an electrical system 1410, a hydraulic system 1412, and an environmental system 1414. Any number of other systems may be included. Although an aerospace example is shown here, the principles disclosed herein may be applied to other industries, such as the automotive industry. Correspondingly, the principles disclosed herein may be applied to other vehicles (e.g., land vehicles, marine vehicles, space vehicles, etc.) in addition to the aircraft 1400.
[0061]
[0076] The disclosed systems and methods for relating test data of a part under test to a coordinate system of an end product may be employed during any one or more of the stages of manufacturing and service method 1300. For example, components or subassemblies corresponding to manufacturing of components and subassemblies (block 1306) may be fabricated or manufactured in a manner similar to components or subassemblies manufactured during operation of aircraft 1400 (block 1312). Also, one or more embodiments of one or more systems, one or more methods, or combinations thereof may be utilized during the manufacturing stage (blocks 1306 and 1308), for example, by substantially streamlining or reducing the cost of assembly of aircraft 1400. Similarly, one or more embodiments implementing the systems or methods, or combinations thereof may be utilized, for example but not limited to, during operation of aircraft 1400 (block 1312) and / or during maintenance and service (block 1314).
[0062]
[0077] The described features, advantages, and characteristics of one embodiment may be combined in any suitable manner in one or more other embodiments. Those skilled in the art will recognize that the embodiments described herein may be practiced without one or more of the specific features or advantages of a particular embodiment. In other examples, additional features and advantages may be recognized in a particular embodiment that may not be present in all embodiments. Furthermore, while various examples of fastening systems 100 and methods 400, 700, 1000 for joining multiple substrates of a workpiece have been shown and described, modifications will occur to those skilled in the art upon reading this specification. The present application includes such modifications and is limited only by the scope of the claims.
Claims
1. 1. A fastening system (100) for joining multiple substrates (102) of a workpiece (104), the workpiece (104) having a working side (106) and a blind side (108), the fastening system (100) comprising: A combined barrel member (110) including a cylindrical barrel body (112) having a proximal end (114), a distal end (116), a central bore (118) within the cylindrical barrel body (112), and a barrel flange (122) adjacent the distal end (116) of the cylindrical barrel body (112), the central bore (118) including a counterbored barrel portion (119) and a threaded barrel portion (120) having internal threads (121), the combined barrel member (110) including a front end (116) and a rear end (118) of the cylindrical barrel body (112). a mating barrel member (110) configured to be inserted from the blind side (108) of the workpiece (104) into a mating bore (128) through at least one of the plurality of substrates (202), the barrel flange (122) configured to limit further insertion of the mating barrel member (110) into the mating bore (128), the cylindrical barrel body (112) including an outer barrel surface (124) having a lubricious coating (126); a bolt member (130) including a head portion (132), a threaded bolt portion (134), and a shank portion (135) extending between the head portion (132) and the threaded bolt portion (134), the bolt member (130) configured to be inserted into the mating bores (128) through the plurality of substrates (102) from the working side (106) of the workpiece (104) until a distal end (136) of the bolt member (130) contacts the mating barrel member (110), the threaded bolt portion (134) configured to threadably engage the internal threads (121) of the mating barrel member (110) after contact with the mating barrel member (110); Equipped with 1. A fastening system (100) comprising: a bolt member (130) configured to radially expand said mating barrel member (110) when said bolt member (130) fully engages with said mating barrel member (110), said mating barrel member (110) configured to provide an interference fit (206) within said mating bores (128) through said plurality of substrates (102).
2. The fastening system of claim 1 , wherein the plurality of substrates (102) includes at least one composite substrate (138).
3. 2. The fastening system of claim 1, wherein the coupling barrel member (110) is configured to be press-fit into the interface bore (128) through at least one substrate (202) of the plurality of substrates (102) from the blind side (108) of the workpiece (104).
4. 4. The fastening system of claim 3, wherein when the coupling barrel member (110) is not press-fit into the mating bore (128) through one or more substrates (204) of the plurality of substrates (102), the coupling barrel member (110) press-fit into the mating bore (128) of the at least one substrate (202) is configured to receive the one or more substrates (204) from the working side (106) of the workpiece (104) via the mating bore (128) through the one or more substrates (204).
5. 2. The fastening system of claim 1, wherein the mating barrel member is configured to be inserted from the blind side of the workpiece into the mating bore through at least one of the plurality of substrates and retracted from the working side of the workpiece into a remaining portion of the mating bore using an insertion tool configured to engage the mating barrel member and to disengage after the barrel flange reaches the blind side of the workpiece.
6. 6. The fastening system of claim 5, wherein when the coupling barrel member (110) is not inserted into the mating bore (128) through one or more substrates (204) of the plurality of substrates (102), the coupling barrel member (110) inserted into the mating bore (128) of the at least one substrate (202) is configured to receive the one or more substrates (204) from the working side (106) of the workpiece (104) via the mating bore (128) through the one or more substrates (204).
7. moreover, a cap closure member (208) including a dome portion (210) and a cap flange (212), the cap closure member (208) configured for placement over the mating barrel member (110), the cap flange (212) configured to secure the cap closure member (208) to the blind side (108) of the workpiece (104); The fastening system of claim 1 , comprising:
8. The fastening system of claim 1 , wherein the coupling barrel member (110) comprises a metallic material.
9. The fastening system of claim 8 , wherein the metallic material comprises at least one of stainless steel, titanium, a titanium alloy, a cobalt chromium alloy, and a nickel titanium alloy.
10. The fastening system of claim 1 , wherein the lubricious coating (126) comprises at least one of indium, an indium alloy, tin, a tin alloy, bismuth, a bismuth alloy, aluminum, and an aluminum alloy.
11. 2. The fastening system of claim 1, wherein the lubricious coating (126) on the outer barrel surface (124) includes conductive features configured to provide electromagnetic energy protection to the workpiece (104) when the bolt member (130) comes into full engagement with the barrel member (110).
12. 2. The fastening system of claim 1, wherein the outer barrel surface (124) is coated with a conductive coating (140) to provide electromagnetic energy protection to the workpiece (104) when the bolt member (130) becomes fully engaged with the mating barrel member (110).
13. The fastening system of claim 12, wherein the conductive coating (140) comprises at least one of indium, an indium alloy, tin, a tin alloy, lead, and a lead alloy.
14. The fastening system of claim 1 , wherein the bolt member (130) comprises a metallic material.
15. The fastening system of claim 14 , wherein the metallic material comprises at least one of stainless steel, titanium, a titanium alloy, a cobalt chromium alloy, and a nickel titanium alloy.
16. The fastening system of claim 1 , wherein the head portion (132) of the bolt member (130) includes a torque feature (142).
17. 17. The fastening system of claim 16, wherein the torque feature (142) is configured to facilitate rotation of the bolt member (130) using at least one of a hex key torque tool, a cross tip driver torque tool, a flat tip driver torque tool, and a hex socket torque tool.
18. 2. The fastening system of claim 1, wherein the head portion (132) of the bolt member (130) comprises at least one of a protruding head, a flat head, a countersunk head, a raised head, a recessed hexagon socket head, a recessed cross tip head, a recessed flat tip head, and a hexagon head.
19. 2. The fastening system of claim 1, wherein the interface bores (128) through the plurality of substrates (102) at the working side (106) of the workpiece (104) include at least one of a countersunk portion (302), a counterbored portion (304), and a cylindrical portion (306).
20. 2. The fastening system of claim 1, wherein the coupling barrel member (110) further comprises an inner counterbored surface (216) of the counterbored barrel portion (119) and the bolt member (130) further comprises an outer shank surface (144) of the shank portion (135), and at least one of the inner counterbored surface (216) and the outer shank surface (144) is coated with the lubricious coating (126).
21. 2. The fastening system of claim 1, wherein the coupling barrel member (110) further comprises an internal threaded surface (218) of the threaded barrel portion (120) and the bolt member (130) further comprises an external threaded surface (146) of the threaded bolt portion (134), and at least one of the internal threaded surface (218) and the external threaded surface (146) is coated with the lubricious coating (126).
22. 2. The fastening system of claim 1, wherein an outer thread diameter of the threaded bolt portion (134) of the bolt member (130) is substantially larger than an inner thread diameter of the threaded barrel portion (120) of the coupling barrel member (110).
23. 23. The fastening system of claim 22, wherein the outer thread diameter is substantially larger than the inner thread diameter by at least one of about 0.0005 inches, about 0.0010 inches, about 0.0015 inches, about 0.0020 inches, and about 0.0025 inches.
24. 23. The fastening system of claim 22, wherein the outer thread diameter is substantially larger than the inner thread diameter by at least one of about 0.2 percent, about 0.4 percent, about 0.6 percent, about 0.8 percent, and about 1.0 percent.
25. 2. The fastening system of claim 1, wherein an outer shank diameter of the shank portion (135) of the bolt member (130) is substantially larger than an inner counterbored diameter of the counterbored barrel portion (119) of the coupling barrel member (110).
26. 26. The fastening system of claim 25, wherein the outer shank diameter is substantially larger than the inner counterbored diameter by at least one of about 0.0005 inches, about 0.0010 inches, about 0.0015 inches, about 0.0020 inches, and about 0.0025 inches.
27. 26. The fastening system of claim 25, wherein the outer shank diameter is substantially larger than the inner counterbored diameter by at least one of about 0.2 percent, about 0.4 percent, about 0.6 percent, about 0.8 percent, and about 1.0 percent.
28. The threaded bolt portion (134) of the bolt member (130) is a cylindrical threaded body (145) including an exterior threaded surface (146) configured to face the internal threads (121) of the cylindrical barrel body (112) when the bolt member (130) is inserted into the central bore (118) and engages the internal threads (121) of the threaded barrel portion (120) of the coupling barrel member (110); The fastening system of claim 1 , comprising:
29. 29. The fastening system of claim 28, wherein an outer thread diameter of the cylindrical threaded body (145) is substantially larger than an inner thread diameter of the female threads (121) of the threaded barrel portion (120).
30. 30. The fastening system of claim 29, wherein the outer thread diameter is substantially larger than the inner thread diameter by at least one of about 0.0005 inches, about 0.0010 inches, about 0.0015 inches, about 0.0020 inches, and about 0.0025 inches.
31. 30. The fastening system of claim 29, wherein the outer thread diameter is substantially larger than the inner thread diameter by at least one of about 0.2 percent, about 0.4 percent, about 0.6 percent, about 0.8 percent, and about 1.0 percent.
32. 29. The fastening system of claim 28, wherein the external threaded surface (146) of the bolt member (130) is configured to radially expand the threaded barrel portion (120) of the mating barrel member (110) when the bolt member (130) is fully engaged with the mating barrel member (110), which in combination with a corresponding cylindrical shape of the mating bore (128) is configured to provide the interference fit (206) within the mating bores (128) through the plurality of substrates (102).
33. The shank portion (135) of the bolt member (130) is a cylindrical shank body (143) including an outer shank surface (144) configured to face the counterbored barrel portion (119) of the mating barrel member (110) when the bolt member (130) is inserted into the central bore (118) and engages the internal threads (121) of the threaded barrel portion (120) of the mating barrel member (110); The fastening system of claim 1 , comprising:
34. 34. The fastening system of claim 33, wherein an outer shank diameter of the cylindrical shank body (143) is substantially larger than an inner counterbored diameter of the counterbored barrel portion (119) of the coupling barrel member (110).
35. 35. The fastening system of claim 34, wherein the outer shank diameter is substantially larger than the inner counterbored diameter by at least one of about 0.0005 inches, about 0.0010 inches, about 0.0015 inches, about 0.0020 inches, and about 0.0025 inches.
36. 35. The fastening system of claim 34, wherein the outer shank diameter is substantially larger than the inner counterbored diameter by at least one of about 0.2 percent, about 0.4 percent, about 0.6 percent, about 0.8 percent, and about 1.0 percent.
37. 34. The fastening system of claim 33, wherein the outer shank surface (144) of the bolt member (130) is configured to radially expand the counterbored barrel portion (119) of the mating barrel member (110) when the bolt member (130) is fully engaged with the mating barrel member (110), which in combination with a corresponding cylindrical shape of the mating bore (128) is configured to provide the interference fit (206) within the mating bores (128) through the plurality of substrates (102).
38. A method (400) for joining multiple substrates (102) of a workpiece (104), the workpiece (104) having a working side (106) and a blind side (108), the method (400) comprising: Inserting (402) a mating barrel member (110) from the blind side (108) of the workpiece (104) into a mating bore (128) through at least one of the substrates (202) of the plurality of substrates (102), the mating barrel member (110) including a cylindrical barrel body (112) having a proximal end (114), a distal end (116), and a central bore (118) within the cylindrical barrel body (112), the central bore (118) including a counterbored barrel portion (119) and an internal thread (121). inserting (402) a mating barrel member (110) comprising a threaded barrel portion (120) having a threaded bore (128) extending from the distal end (116) of the cylindrical barrel body (112), the mating barrel member (110) further comprising a barrel flange (122) adjacent the distal end (116) of the cylindrical barrel body (112), the barrel flange (122) configured to limit further insertion of the mating barrel member (110) into the mating bore (128), the cylindrical barrel body (112) further comprising an outer barrel surface (124) having a lubricious coating (126); inserting (404) a bolt member (130) from the working side (106) of the workpiece (104) into the mating bores (128) through the plurality of substrates (102) until a distal end (136) of the bolt member (130) contacts the mating barrel member (110), the bolt member (130) including a head portion (132), a threaded bolt portion (134), and a shank portion (135) extending between the head portion (132) and the threaded bolt portion (134); rotating (406) the bolt member (130) to engage the threaded bolt portion (134) with the internal threads (121) of the coupling barrel member (110); radially expanding (408) the mating barrel member (110) within the mating bores (128) through the plurality of substrates (102) once the bolt member (130) is fully engaged with the mating barrel member (110); providing (410) an interference fit (206) with the coupling barrel member (110) within the mating bores (128) through the plurality of substrates (102) in response to radially expanding the coupling barrel member (110) once the bolt member (130) is fully engaged with the coupling barrel member (110); The method (400).
39. The inserting (402) of the coupling barrel member (110) comprises: Press-fitting (502) the mating barrel member (110) into the mating bore (128) through at least one substrate (202) of the plurality of substrates (102) from the blind side (108) of the workpiece (104).
39. The method of claim 38, comprising:
40. If the mating barrel member (110) is not a press fit into the mating bore (128) through one or more substrates (204) of the plurality of substrates (102), the inserting (402) of the mating barrel member (110) may further include: receiving (504) the one or more substrates (204) in the coupling barrel member (110) press-fitted into the mating bore (128) of the at least one substrate (202) via the mating bore (128) passing through the one or more substrates (204) from the working side (106) of the workpiece (104); 40. The method of claim 39, comprising:
41. The inserting (402) of the coupling barrel member (110) comprises: inserting (602) the mating barrel member (110) into the mating bore (128) through the at least one substrate (202) of the plurality of substrates (102) from the blind side (108) of the workpiece (104); pulling (604) the mating barrel member (110) from the working side (106) of the workpiece (104) into a remaining portion of the mating bore (128) using an insertion tool configured to engage the mating barrel member (110) and to disengage after the barrel flange (122) reaches the blind side (108) of the workpiece (104); 39. The method of claim 38, comprising:
42. If the mating barrel member (110) is not inserted into the mating bore (128) through one or more substrates (204) of the plurality of substrates (102), the inserting (402) of the mating barrel member (110) may further include: receiving (606) the one or more substrates (204) in the coupling barrel member (110) inserted into the mating bore (128) of the at least one substrate (202) via the mating bore (128) passing through the one or more substrates (204) from the working side (106) of the workpiece (104); 42. The method of claim 41 , comprising:
43. moreover, Positioning (702) a cap closure member (208) over the mating barrel member (110), the cap closure member (208) including a dome portion (210) and a cap flange (212) configured to secure the cap closure member (208) to the blind side (108) of the workpiece (104).
39. The method (700) of claim 38, comprising:
44. moreover, applying (704) the lubricious coating (126) to the outer barrel surface (124) of the combined barrel member (110); 39. The method (700) of claim 38, comprising:
45. 45. The method of claim 44, wherein the lubricious coating (126) on the outer barrel surface (124) includes conductive features configured to provide electromagnetic energy protection to the workpiece (104) when the bolt member (130) becomes fully engaged with the mating barrel member (110).
46. moreover, Applying (706) a conductive coating (140) to the outer barrel surface (124) of the mating barrel member (110).
39. The method (700) of claim 38, comprising:
47. The inserting (402) of the coupling barrel member (110) comprises: restricting (802) further insertion of the mating barrel member (110) into the mating bores (128) through the plurality of substrates (102) based on the barrel flanges (122) at the distal ends (116) of the mating barrel member (110).
39. The method of claim 38, comprising:
48. The rotating (406) of the bolt member (130) comprises: Tightening (902) the bolt member (130) into full engagement with the mating barrel member (110).
39. The method of claim 38, comprising:
49. moreover, applying (1002) the lubricating coating (126) to at least one of an inner counterbored surface (216) of the counterbored barrel portion (119) of the mating barrel member (110) and an outer shank surface (144) of the shank portion (135) of the bolt member (130); 39. The method (1000) of claim 38, comprising:
50. 39. The method of claim 38, wherein an outer shank diameter of the shank portion (135) of the bolt member (130) is substantially larger than an inner counterbored diameter of the counterbored barrel portion (119) of the coupling barrel member (110).
51. moreover, applying (1004) the lubricating coating (126) to at least one of the internal threaded surface (218) of the threaded barrel portion (120) of the mating barrel member (110) and the external threaded surface (146) of the threaded bolt portion (134) of the bolt member (130); 39. The method (1000) of claim 38, comprising:
52. 40. The method of claim 38, wherein an outer thread diameter of the threaded bolt portion (134) of the bolt member (130) is substantially larger than an inner thread diameter of the threaded barrel portion (120) of the coupling barrel member (110).
53. 39. The method of claim 38, wherein the threaded bolt portion (134) of the bolt member (130) comprises a cylindrical threaded body (145) including an exterior threaded surface (146) configured to face the internal threads (121) of the cylindrical barrel body (112) when the bolt member (130) is inserted into the central bore (118) and engages the internal threads (121) of the threaded barrel portion (120) of the coupling barrel member (110).
54. 54. The method of claim 53, wherein an outer thread diameter of the cylindrical threaded body (145) is substantially larger than an inner thread diameter of the female threads (121) of the threaded barrel portion (120).
55. The radially expanding (408) may include radially expanding (1102) the threaded barrel portion (120) of the mating barrel member (110) once the bolt member (130) is fully engaged with the mating barrel member (110). Including, The providing (410) of the interference fit (206) comprises: When the bolt member (130) is fully engaged with the mating barrel member (110), it combines with a corresponding cylindrical shape of the mating bore (128) to provide the interference fit (206) within the mating bore (128) through the plurality of substrates (102) (1104).
54. The method of claim 53, comprising:
56. 40. The method of claim 38, wherein the shank portion (135) of the bolt member (130) comprises a cylindrical shank body (143) including an outer shank surface (144) configured to face the counterbored barrel portion (119) of the mating barrel member (110) when the bolt member (130) is inserted into the central bore (118) and engages the internal threads (121) of the threaded barrel portion (120) of the mating barrel member (110).
57. 57. The method of claim 56, wherein an outer shank diameter of the cylindrical shank body (143) is substantially larger than an inner counterbored diameter of the counterbored barrel portion (119) of the mating barrel member (110).
58. The radially expanding (408) may include radially expanding (1202) the counterbored barrel portion (119) of the mating barrel member (110) once the bolt member (130) is fully engaged with the mating barrel member (110). Including, The providing (410) of the interference fit (206) comprises: When the bolt member (130) is fully engaged with the mating barrel member (110), it combines with a corresponding cylindrical shape of the mating bore (128) to provide the interference fit (206) within the mating bores (128) through the plurality of substrates (102) (1204).
57. The method of claim 56, comprising:
59. 1. A fastening system (100) for joining a plurality of substrates (102) of a workpiece (104), the plurality of substrates (102) including at least one composite substrate (138), the workpiece (104) having a working side (106) and a blind side (108), the fastening system (100) comprising: A combined barrel member (110) including a cylindrical barrel body (112) having a proximal end (114), a distal end (116), a central bore (118) within the cylindrical barrel body (112) having internal threads (121), and a barrel flange (122) adjacent the distal end (116) of the cylindrical barrel body (112), the central bore (118) including a counterbored barrel portion (119) and a threaded barrel portion (120) having internal threads (121), the combined barrel member (110) including ... distal end (116), a barrel flange (122) adjacent the distal end (116) of the cylindrical barrel body (112), the central bore (118) including a counterbored barrel portion (119), and a threaded barrel portion (120) having internal threads (121), the combined barrel member (110) including a proximal end (114), a distal end (116), a barrel flange (122) adjacent the distal end (116) of the cylindrical barrel body (112), the central bore (118) including a counterbored barrel portion (119), and a threaded barrel portion (120) having internal threads (121), the combined barrel member (110) including a proximal end (114), a distal end (116), a barrel flange (122) adjacent the distal end (116) of the cylindrical barrel body ( a mating barrel member (110) configured to be inserted from the blind side (108) of the workpiece (104) into a mating bore (128) through at least one substrate (202) of the plurality of substrates (102), the barrel flange (122) configured to limit further insertion of the mating barrel member (110) into the mating bore (128), the cylindrical barrel body (112) including an outer barrel surface (124) having a lubricious coating (126); a cap closure member (208) including a dome portion (210) and a cap flange (212), the cap closure member (208) configured for placement over the mating barrel member (110), the cap flange (212) configured to secure the cap closure member (208) to the blind side (108) of the workpiece (104); a bolt member (130) including a head portion (132), a threaded bolt portion (134), and a shank portion (135) extending between the head portion (132) and the threaded bolt portion (134), the bolt member (130) configured to be inserted into the mating bores (128) through the plurality of substrates (102) from the working side (106) of the workpiece (104) until a distal end (136) of the bolt member (130) contacts the mating barrel member (110), the threaded bolt portion (134) configured to threadably engage the internal threads (121) of the mating barrel member (110) after contact with the mating barrel member (110); Equipped with at least one of: i) an outer thread diameter of the threaded bolt portion (134) of the bolt member (130) is substantially larger than an inner thread diameter of the threaded barrel portion (120) of the mating barrel member (110); and ii) an outer shank diameter of the shank portion (135) of the bolt member (130) is substantially larger than an inner counterbored diameter of the counterbored barrel portion (119) of the mating barrel member (110); 1. A fastening system (100) comprising: a bolt member (130) configured to radially expand said mating barrel member (110) when said bolt member (130) fully engages with said mating barrel member (110), said mating barrel member (110) configured to provide an interference fit (206) within said mating bores (128) through said plurality of substrates (102).