CN118763379B - A high performance radio frequency coaxial cable and manufacturing method - Google Patents
A high performance radio frequency coaxial cable and manufacturing method Download PDFInfo
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- CN118763379B CN118763379B CN202411217527.XA CN202411217527A CN118763379B CN 118763379 B CN118763379 B CN 118763379B CN 202411217527 A CN202411217527 A CN 202411217527A CN 118763379 B CN118763379 B CN 118763379B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 42
- 229910052802 copper Inorganic materials 0.000 claims abstract description 130
- 239000010949 copper Substances 0.000 claims abstract description 130
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 129
- 239000004020 conductor Substances 0.000 claims abstract description 59
- 239000003063 flame retardant Substances 0.000 claims abstract description 40
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 36
- 230000007246 mechanism Effects 0.000 claims abstract description 32
- 238000001125 extrusion Methods 0.000 claims abstract description 27
- 238000003466 welding Methods 0.000 claims abstract description 26
- 229920002799 BoPET Polymers 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims description 41
- 238000000465 moulding Methods 0.000 claims description 19
- 239000000758 substrate Substances 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 7
- 230000007423 decrease Effects 0.000 claims 2
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000004049 embossing Methods 0.000 description 113
- 238000007493 shaping process Methods 0.000 description 17
- 238000010586 diagram Methods 0.000 description 8
- 238000004804 winding Methods 0.000 description 8
- 238000005452 bending Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- H01P11/001—Manufacturing waveguides or transmission lines of the waveguide type
- H01P11/005—Manufacturing coaxial lines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
- H01P3/06—Coaxial lines
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Of Electric Cables (AREA)
Abstract
本发明公开了一种高性能射频同轴电缆及制造方法，涉及同轴电缆生产技术领域，包括以下步骤：S1、通过收放卷机构输送内导体；S2、通过挤出机在内导体上包裹绝缘层；S3、利用绕包机在绝缘层上缠绕一层PET薄膜；S4、使用绕包机在PET薄膜上缠绕一层阻燃绵纸；S5、通过铜管成型机将铜带成型为铜管套装在阻燃绵纸上；S6、通过焊接机将铜管进行焊接，阻燃绵纸在焊接过程中对内层起到保护效果；S7、使用挤压轧纹机对铜管进行轧纹，并挤压铜管使之形变贴紧阻燃绵纸；S8、最后使用挤出机在铜管上包裹外护套。通过PET薄膜提高电缆的气密性以及防潮性，通过阻燃绵纸提高电缆的阻燃性能，铜管提高电缆的抗拉、抗压性能，以全面提高电缆的性能。
The invention discloses a high-performance radio frequency coaxial cable and a manufacturing method, which relates to the technical field of coaxial cable production, and comprises the following steps: S1, conveying an inner conductor through a reeling and unreeling mechanism; S2, wrapping an insulating layer on the inner conductor through an extruder; S3, wrapping a layer of PET film on the insulating layer through a wrapping machine; S4, wrapping a layer of flame-retardant tissue paper on the PET film through a wrapping machine; S5, forming a copper strip into a copper tube sleeve on the flame-retardant tissue paper through a copper tube forming machine; S6, welding the copper tube through a welding machine, and the flame-retardant tissue paper plays a protective effect on the inner layer during the welding process; S7, corrugating the copper tube through an extrusion corrugating machine, and extruding the copper tube to deform and close to the flame-retardant tissue paper; S8, finally wrapping an outer sheath on the copper tube through an extruder. The PET film improves the air tightness and moisture resistance of the cable, the flame-retardant tissue paper improves the flame-retardant performance of the cable, and the copper tube improves the tensile and compressive properties of the cable, so as to comprehensively improve the performance of the cable.
Description
Technical Field
The invention relates to the technical field of coaxial cable production, in particular to a high-performance radio frequency coaxial cable and a manufacturing method thereof.
Background
The radio frequency cable is a cable for transmitting electromagnetic energy in a radio frequency range, is an indispensable element in various radio communication systems and electronic equipment, and is widely applied to wireless communication, broadcasting, television, radar, navigation, computers, meters and the like. At present, most of the structures of radio frequency coaxial cables comprise an inner conductor, and an insulating layer, a shielding layer and a sheath which are coaxially coated on the inner conductor from inside to outside in sequence, so that the coaxial cables are poor in flame retardant property, the transmission performance in high temperature or severe environment is affected, the service life of the cables is lower, the tensile capacity is poor, the cables can be dragged during cable wiring, the inner conductor of the cables is easy to damage, meanwhile, the cables are extruded in severe environment (buried underground) for a long time, the situation of breakage or severe abrasion is easy to occur, and the performance of the cables is seriously affected.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a high-performance radio frequency coaxial cable and a manufacturing method thereof, which improve the working performance of the cable in a severe environment and can be used for industrially producing the high-performance cable.
The aim of the invention is realized by the following technical scheme: a manufacturing method of a high-performance radio frequency coaxial cable comprises the following steps:
s1, conveying an inner conductor through a winding and unwinding mechanism;
s2, wrapping an insulating layer on the inner conductor through an extruder;
s3, winding a layer of PET film on the insulating layer by using a wrapping machine;
S4, winding a layer of flame-retardant tissue paper on the PET film by using a wrapping machine;
s5, forming the copper strip into a copper pipe by a copper pipe forming machine, and sleeving the copper pipe on the flame-retardant tissue paper;
s6, welding the copper pipe through a welding machine, wherein the flame-retardant tissue paper has a protection effect on the inner layer in the welding process;
s7, embossing the copper pipe by using an extrusion embossing machine, and extruding the copper pipe to deform and tightly attach the flame-retardant tissue paper;
And S8, finally, wrapping the outer sheath on the copper pipe by using an extruder.
Further, in step S5, the copper pipe make-up machine includes make-up machine platform and carriage, the make-up machine platform is located between carriage and the extrusion embossing machine, it is provided with the unreel dish to rotate on the carriage, the copper strip is around rolling up on the unreel dish, multiunit conveying mechanism has been set gradually along the direction of delivery of inner conductor on the make-up machine platform, conveying mechanism and extrusion embossing machine are provided with tubular forming mechanism, conveying mechanism includes U-shaped frame, upward conveying roller and lower conveying roller, the U-shaped frame is installed on the make-up machine platform, upward conveying roller and lower conveying roller all rotate and connect in the opening of U-shaped frame, upward form copper strip conveying space between conveying roller and the lower conveying roller, tubular forming mechanism includes gradual change forming die and the sizing die that sets gradually along the direction of delivery of inner conductor, gradual change forming die is followed along being close to the direction of sizing die, the gradual change forming die is followed the direction of inner conductor is followed the direction of delivery direction of inner conductor is run through and is equipped with the guide roll, upward the guide roll is equipped with the gradual change forming die is gone up with the guide roll is gone up to the guide roll is in the direction of delivery of inner conductor, the guide roll is gone up the guide roll is located between the guide roll is gone up the guide roll is in the direction of the top of the guide roll is gone up the gradual change forming die is equal to the guide roll is gone up the top of the inner diameter of the guide roll is down the inner conductor is set up.
Further, all be provided with auxiliary forming mechanism between lower guide roll and the gradual change forming die, between gradual change forming die and the design mould, auxiliary forming mechanism includes two group's type subassemblies, the shaping subassembly symmetry sets up the both sides of inner conductor, shaping subassembly mounting base, go up shaping ball and lower shaping ball, mounting base passes through bolted connection the make-up machine platform, go up shaping ball one side with one side of lower shaping ball fixedly connected with first axle and second axle respectively, first axle is kept away from go up shaping ball's one end rotation connection slide, vertical installation has the cylinder on the mounting base, the telescopic shaft connection of cylinder the slide, the second axle rotates to be connected on the mounting base.
Further, in step S7, the extrusion embossing machine includes an embossing machine table and an embossing mold, the embossing machine table is provided with a plurality of embossing molds at equal intervals along the conveying direction of the inner conductor, the embossing mold includes a fixed base ring and a plurality of sectors, the fixed base ring is provided with a plurality of sectors in turn along the circumferential direction thereof, the sectors are contacted to form an embossing ring, the embossing ring and the fixed base ring are coaxially arranged, the sectors have a degree of freedom of moving away from or approaching to the center of the circle of the fixed base ring, the sectors are provided with embossing gears in a rotating manner, the axis of the embossing gears is perpendicular to the axis of the fixed base ring, the embossing gears locally extend to the inner ring of the embossing ring, the rotation speed of the embossing gears is equal to the conveying speed of the inner conductor, the diameter of an inscribed circle formed between the embossing gears is smaller than that of the copper pipe, and the embossing gears in the embossing molds are staggered along the circumferential direction of the embossing ring.
Further, the inner gear ring is rotatably arranged on the fixed base ring, the inner gear ring and the fixed base ring are coaxially arranged, a sliding plate is fixed on the outer wall of the sector, the sliding plate and the inner gear ring are arranged in an axial staggered mode along the fixed base ring, a straight rack is arranged on one side of the sliding plate, a long gear is meshed with the straight rack, the long gear is rotatably connected with the fixed base ring, the long gear is meshed with the inner gear ring, a first motor is arranged on the fixed base ring, and an output shaft of the first motor is in transmission connection with one gear shaft of the long gear.
Further, each sector is provided with a transmission mechanism on the sliding plate, each transmission mechanism comprises a first transmission shaft, a second transmission shaft and arc teeth, the first transmission shaft and the second transmission shaft are all rotationally connected to the sliding plate, the axis of the first transmission shaft is parallel to the axis of the embossing gear, the axis of the second transmission shaft is parallel to the axis of the fixed base ring, the bottom of each arc tooth is fixedly provided with an inverted T-shaped sliding strip, the inverted T-shaped sliding strip is coaxially arranged with each arc tooth, the sliding plate is provided with an inverted T-shaped sliding groove, the inverted T-shaped sliding strip is slidably matched with the inverted T-shaped sliding groove, the inner ring of each arc tooth is uniformly provided with a plurality of tooth grooves, a first gear and a first bevel gear are sleeved on the second transmission shaft, the first gear is sleeved with the second gear and the second bevel gear, the first gear is meshed with the arc teeth, the second bevel gear is meshed with the second bevel gear, and the embossing gear is meshed with the embossing gear, and when a plurality of rolling rings are contacted with each other, and the plurality of annular gears form an arc ring to form the arc tooth.
Further, the fixed base ring is rotationally provided with a driving gear, the driving gear is meshed with the driving annular gear, the fixed base ring is provided with a second motor, an output shaft of the second motor is in transmission connection with a shaft of the driving gear, an annular groove is coaxially formed in the bottom of the annular gear, a plurality of mounting shafts are uniformly distributed and fixed on the fixed base ring along the axial direction of the annular groove, a bearing is connected to the top key of each mounting shaft, the annular groove comprises a large-width ring and a small-width ring which are arranged in a communicating manner along the direction close to each mounting shaft, and each mounting shaft penetrates through the corresponding small-width ring to enable the bearing to be in rotary fit in the large-width ring.
Further, the extrusion embossing machine further comprises a detachable base plate, a bolt plate is fixed at the bottom of the fixed base ring and connected to the detachable base plate through bolts, a strip-shaped mounting groove is formed in the top of the embossing machine table, the strip-shaped mounting groove extends to one end of the embossing machine table, and the detachable base plate slides into and is adapted to the strip-shaped mounting groove from the opening end of the strip-shaped mounting groove.
Further, limiting strips are fixed on two sides of the detachable substrate, limiting grooves are formed in two side walls of the strip-shaped mounting grooves, the limiting strips are adapted to the limiting grooves, a baffle is arranged at the opening end of the strip-shaped mounting grooves and connected with the embossing machine through bolts, and the baffle is used for propping against the detachable substrate.
The high-performance radio frequency coaxial cable is produced by the manufacturing method, and comprises an inner conductor, wherein an insulating layer is wrapped on the inner conductor, a layer of PET film is wrapped on the insulating layer in a wrapping mode, a layer of flame-retardant tissue paper is wrapped on the PET film in a wrapping mode, a copper pipe is sleeved on the flame-retardant tissue paper, the copper pipe is subjected to embossing treatment, and an outer sheath is wrapped on the copper pipe.
The beneficial effects of the invention are as follows:
1. The PET film is wound on the insulating layer, so that the air tightness and the moisture resistance of the cable are improved, the flame retardant tissue paper is wound on the PET film, the flame retardant property of the cable is improved, meanwhile, the PET film and the inner conductor are protected when the copper pipe is welded, the copper pipe improves the tensile property and the compressive property of the cable, the cable has better sealing property, moisture resistance, tensile property, compressive property and the like, the performance of the cable is comprehensively improved, and the cable can be used in a severe environment for a long time.
2. The copper strip is formed into a tube body through the copper tube forming machine and sleeved on the cable, and the copper tube is extruded and embossed through the extrusion embossing machine, so that the copper tube is attached to the flame-retardant tissue paper, the compactness of the cable is improved, the cable structure is more stable, and simultaneously, embossing is performed on the outer ring of the copper tube, the bending performance of the cable is improved, and the cable has better bending resistance.
Drawings
Fig. 1 is a schematic structural diagram of a high performance rf coaxial cable according to the present invention;
Fig. 2 is a schematic diagram of the production of copper tubing in a method of manufacturing a high performance rf coaxial cable according to the present invention;
Fig. 3 is a second schematic diagram of the production of copper tubing in a method of manufacturing a high performance rf coaxial cable according to the present invention;
Fig. 4 is a schematic structural diagram of an embossing mold in a method for manufacturing a high-performance rf coaxial cable according to the present invention;
fig. 5 is a schematic diagram of a embossing mold in a method for manufacturing a high-performance rf coaxial cable according to the second embodiment of the present invention;
fig. 6 is a schematic structural diagram III of an embossing mold in a method for manufacturing a high-performance rf coaxial cable according to the present invention;
Fig. 7 is a schematic diagram of an internal structure of a progressive forming mold in a method for manufacturing a high-performance rf coaxial cable according to the present invention;
fig. 8 is a schematic diagram of an internal structure of an inner gear ring in a method for manufacturing a high-performance rf coaxial cable according to the present invention;
FIG. 9 is an enlarged view of FIG. 8 at A;
fig. 10 is a side view of an extrusion corrugator in a method of manufacturing a high performance rf coaxial cable according to the present invention;
In the figure, 1-inner conductor, 2-insulating layer, 3-PET film, 4-flame retardant tissue paper, 5-copper tube, 6-outer sheath, 7-welder, 8-forming machine table, 9-conveyor rack, 10-reel, 11-U-shaped rack, 12-upper conveying roller, 13-lower conveying roller, 14-gradual forming die, 15-forming die, 16-gradual forming hole, 17-forming hole, 18-upper guide roller, 19-mounting base, 20-upper forming ball, 21-lower forming ball, 22-first shaft, 23-second shaft, 24-slider, 25-cylinder, 26-embossing machine table, 27-fixed base ring, 28-sector, 29-embossing gear, 30-inner gear ring, 31-sliding plate, 32-straight rack, 33-long gear, 34-first motor, 35-first transmission shaft, 36-second transmission shaft, 37-arc tooth, 38-inverted T-shaped sliding bar, 39-inverted T-shaped sliding bar, 40-first bevel gear, 41-first bevel gear, 42-second bevel gear, 43-second bevel gear, 45-ring groove, 48-groove, 45-groove, 52-groove, and 50-groove.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.
A manufacturing method of a high-performance radio frequency coaxial cable comprises the following steps:
s1, conveying an inner conductor 1 through a winding and unwinding mechanism;
s2, wrapping an insulating layer 2 on the inner conductor 1 through an extruder; insulating and protecting the inner conductor 1;
S3, winding a layer of PET film 3 on the insulating layer 2 by using a wrapping machine; the cable has good air tightness and moisture resistance, can be laid underground, and can be used in a wet and severe environment;
S4, winding a layer of flame-retardant tissue paper 4 on the PET film 3 by using a wrapping machine; the flame retardance of the cable is improved through the flame-retardant tissue paper 4;
S5, forming the copper strip into a copper pipe 5 by a copper pipe forming machine, and sleeving the copper pipe on the flame-retardant tissue paper 4; the cable has tensile and bending resistance;
S6, welding the copper pipe 5 through a welding machine 7, wherein the flame-retardant tissue 4 has a protection effect on the inner layer in the welding process; the copper pipe 5 is molded into the copper pipe 5 through the copper belt mold, then the molding position is welded through the welding machine 7, the welding temperature is generally higher, in order to avoid the influence of the welding of the copper pipe 5 on the PET film 3, the insulating layer 2 and the inner conductor 1, the flame-retardant tissue paper 4 is wound on the PET film 3 to isolate the welding temperature, and the cable is protected through the flame-retardant property of the flame-retardant tissue paper 4, so that the copper pipe 5 is molded smoothly and the performance of the cable is not influenced;
S7, embossing the copper pipe 5 by using an extrusion embossing machine, and extruding the copper pipe 5 to deform and cling to the flame-retardant tissue paper 4; the whole cable structure is more compact, the connection among the layers of the cable is more compact, the delamination condition can not occur, and simultaneously, the copper pipe 5 is embossed, so that the bending resistance of the copper pipe 5 is improved;
and S8, finally, wrapping the outer sheath 6 on the copper pipe 5 by using an extruder.
Because the cable needs to be armored to improve tensile and compressive properties, the copper pipe 5 needs to be sheathed on the cable, the insulating layer 2 is generally wrapped by adopting an extruder in the production of the traditional cable, the PET film 3 and the flame-retardant tissue paper 4 are wrapped by adopting a wrapping machine, but the copper pipe 5 is made of metal, and because the copper pipe 5 needs to be used in underground or other severe environments, the copper pipe 5 is made of steel, so the copper pipe 5 has poor flexibility and cannot be produced in a wrapping mode, and therefore, the novel cable manufacturing method and manufacturing equipment are provided, and the method and the equipment are specifically as follows:
Example 1
As shown in fig. 1 to 10, in step S5, the copper pipe forming machine comprises a forming machine table 8 and a conveying frame 9, wherein the forming machine table 8 is positioned between the conveying frame 9 and the extrusion embossing machine, a unreeling disc 10 is rotatably arranged on the conveying frame 9, copper strips are reeled on the unreeling disc 10, a plurality of groups of conveying mechanisms are sequentially arranged on the forming machine table 8 along the conveying direction of the inner conductor 1, the conveying mechanisms and the extrusion embossing machine are provided with tubular forming mechanisms, each conveying mechanism comprises a U-shaped frame 11, an upper conveying roller 12 and a lower conveying roller 13, the U-shaped frame 11 is arranged on the forming machine table 8, the upper conveying roller 12 and the lower conveying roller 13 are rotatably connected in an opening of the U-shaped frame 11, the copper strip conveying space is formed between the upper conveying roller 12 and the lower conveying roller 13, the tubular forming mechanism comprises a gradual change forming die 14 and a shaping die 15 which are sequentially arranged along the conveying direction of the inner conductor 1, the gradual change forming die 14 is penetrated and provided with a gradual change forming hole 16 along the conveying direction of the inner conductor 1, the inner diameter of the gradual change forming hole 16 is gradually reduced along the direction close to the shaping die 15, the shaping die 15 is penetrated and provided with a shaping hole 17 along the conveying direction of the inner conductor 1, the inner diameter of the shaping hole 17 is equal to the outer diameter of the copper pipe 5, the welding machine 7 is arranged at the top of the gradual change forming die 14, a welding head of the welding machine 7 is positioned between the gradual change forming die 14 and the shaping die 15, The top of the U-shaped frame 11 is rotatably provided with an upper guide roller 18, the installation height of a plurality of upper guide rollers 18 is gradually reduced along the conveying direction of the inner conductor 1, a lower guide roller 55 is rotatably arranged between the upper guide roller 18 and the gradual change forming die 14, the inner conductor 1 penetrates into the gradual change forming hole 16 through the top of the upper guide roller 18 and the bottom of the lower guide roller 55, the produced inner conductor 1 is wound on a pay-off reel, the cable is delivered downwards and forwards through the pay-off reel, a take-up reel is arranged at the tail end of the cable production, the finished cable is wound on the take-up reel, thereby realizing uninterrupted linear conveying of the cable, the inner conductor 1 firstly passes through an extruder, and the insulating layer 2 is formed through extrusion molding of the extruder, The insulating layer 2 is wrapped on the inner conductor 1, which belongs to the prior art and is not repeated, the inner conductor 1 wrapping the insulating layer 2 enters a wrapping station, the PET film 3 and the flame-retardant tissue paper 4 are respectively wrapped on the inner conductor 1 through two groups of wrapping machines, then the inner conductor 1 enters a copper pipe forming machine, the inner conductor 1 sequentially passes through the top of the upper guide roller 18 and the bottom of the lower guide roller 55 to finish limit conveying so as to convey the inner conductor 1 into the gradual change forming hole 16 of the gradual change forming die 14, meanwhile, the copper strip is placed on the placing reel 10, passes through between the upper conveying roller 12 and the lower conveying roller 13, limit conveying of the copper strip is realized, the copper strip enters the gradual change forming hole 16 of the gradual change forming die 14, the copper strip enters the gradual change forming hole 16 to generate arc deformation, so that the copper strip coil is tubular, the diameter of the gradual change forming hole 16 gradually reduces to the outer diameter of the copper pipe 5, so that the copper strip is gradually folded, the phenomenon that the tubular shape formed by the copper strip coil is uneven due to direct deformation folding is avoided, the copper strip is wound into the tubular shape through a gradual guiding mode, the inner conductor 1 penetrates through the gradual change forming hole 16, so that the copper strip is folded and wound on the flame-retardant tissue paper 4, the sleeving of the copper pipe 5 is completed, then the copper strip enters the shaping hole 17 of the shaping die 15, the state that the copper strip is folded into the tubular shape is kept, two sides of the copper strip are close to form welding seams, finally, the two sides of the copper strip are welded together through the welding machine 7 to form the copper pipe 5, Thereby fine production of copper strips becomes tubulose and suit on fire-retardant tissue 4, realize the production of cable area copper pipe 5, fire-retardant tissue 4 can play the guard action to inner conductor 1 when welding machine 7 welds, make the welding operation can not influence inner conductor 1's performance, carry the processing workstation of extrusion embossing machine through armored cable, carry out embossing to copper pipe 5 through extrusion embossing machine, improve copper pipe 5's bending property on the one hand, on the other hand make copper pipe 5 receive the tight fire-retardant tissue 4 of compression subsides, make the overall structure of cable compacter, closely laminate between each layer, avoid the circumstances of delaminating.
Example two
In order to avoid the situation that the copper strip is folded in the gradual change forming hole 16 and is wrinkled or folded, on the basis of the first embodiment, as shown in fig. 2, 3 and 7, auxiliary forming mechanisms are arranged between the lower guide roller 55 and the gradual change forming die 14 and between the gradual change forming die 14 and the shaping die 15, the auxiliary forming mechanisms comprise two groups of forming components, the forming components are symmetrically arranged at two sides of the inner conductor 1, a forming component mounting base 19, an upper forming ball 20 and a lower forming ball 21 are arranged on the auxiliary forming mechanism, the mounting base 19 is connected with a forming machine table 8 through bolts, one side of the upper forming ball 20 and one side of the lower forming ball 21 are respectively and fixedly connected with a first shaft 22 and a second shaft 23, one end of the first shaft 22 away from the upper forming ball 20 is rotatably connected with a sliding seat 24, a cylinder 25 is vertically arranged on the mounting base 19, a telescopic shaft of the cylinder 25 is connected with the sliding seat 24, the second shaft 23 is rotatably connected with the mounting base 19, the upper forming ball 20 is driven by the air cylinder 25 to move close to or far away from the lower forming ball 21, the distance between the upper forming ball 20 and the lower forming ball 21 is adjusted to adapt to the thickness of a copper strip, the side edge of the copper strip passes through the space between the upper forming ball 20 and the lower forming ball 21, the copper strip is extruded up and down through the spherical surfaces of the upper forming ball 20 and the lower forming ball 21 to deform, the side edge of the copper strip is close to the center line of the copper strip to be folded and bent, the deformation of the copper strip is smoother, the copper strip can be well deformed to penetrate into the gradual change forming hole 16 to form the copper pipe 5 by a mould, two groups of forming assemblies are arranged, the copper strip is firstly deformed and folded by a group of forming assemblies before entering into the gradual change forming hole 16, then enters into the forming hole 17 to form and keep the folded copper strip to be well entered into the forming hole 17, the welding seam of the copper pipe formed between the gradual change forming die 14 and the shaping die 15 is more stable, and good welding effect is ensured.
Example III
The cable is sleeved with the copper pipe 5 and then enters an extrusion embossing machine to be embossed, so that the bending performance and the structural strength of the cable are improved, and therefore, on the basis of the second embodiment, as shown in fig. 2 to 6, in the step S7, the extrusion embossing machine comprises an embossing machine table 26 and embossing dies, the embossing machine table 26 is provided with a plurality of embossing dies at equal intervals along the conveying direction of the inner conductor 1, the embossing dies comprise a fixed base ring 27 and a plurality of sectors 28, the fixed base ring 27 is provided with a plurality of sectors 28 along the circumferential direction thereof in sequence, the sectors 28 are contacted to form an embossing ring, the embossing ring and the fixed base ring 27 are coaxially arranged, the sectors 28 have the freedom degree of moving away from or close to the center of the fixed base ring 27, the sectors 28 are rotationally provided with embossing gears 29, the axes of the embossing gears 29 are perpendicular to the axes of the fixed base ring 27, the embossing gears 29 are partially extended to the inner ring of the embossing ring, the rotation speed of the embossing gears 29 is equal to the conveying speed of the inner conductor 1, the diameter of an inscribed circle formed among the embossing gears 29 is smaller than that of the copper pipe 5, the embossing gears 29 in the embossing dies are staggered along the circumferential direction of the embossing ring, a cable sleeved with the copper pipe 5 passes through the inner ring of the embossing ring, the embossing is carried out on the outer wall of the copper pipe 5 through extrusion embossing by the embossing gears 29, the rotation speed of the embossing gears 29 is matched with the conveying speed of the copper pipe 5, the embossing can be smoothly carried out, interference is avoided, and secondly, as the embossing gears 29 in a single embossing die cannot fully cover the outer wall of the copper pipe 5, namely, the embossing diameter in the circumferential direction of the copper pipe 5 cannot form a ring shape, a plurality of embossing dies are staggered along the conveying path of the copper pipe 5, namely, the embossing gears 29 in the embossing dies are staggered along the circumferential direction of the copper pipe 5, so that the next embossing gear 29 acts on the pore position of the last embossing gear 29, namely acts on an unground area, and as the diameter of an inscribed circle formed by the embossing gears 29 is smaller than that of the copper pipe 5, the copper pipe 5 is extruded to deform during embossing, on one hand, the embossing area is enlarged, the embossing dies are matched to form a finished ring shape, on the other hand, the copper pipe 5 deforms to be tightly attached to the flame-retardant tissue paper 4, the structure of the cable is more compact, the strength of the cable is improved, and therefore, the outer wall of the copper pipe 5 is uniformly embossed with ring-shaped grains, and the bending performance of the cable is improved.
Example IV
Because the diameter of the inscribed circle formed by the plurality of embossing gears 29 is smaller than that of the copper tube 5, it is difficult to pass the cable sleeved with the copper tube 5 through the embossing ring in the initial stage of production, therefore, on the basis of the fourth embodiment, as shown in fig. 2 to 6, an inner gear ring 30 is rotatably mounted on the fixed base ring 27, the inner gear ring 30 is coaxially arranged with the fixed base ring 27, a sliding plate 31 is fixed on the outer wall of the sector 28, the sliding plate 31 and the inner gear ring 30 are alternately arranged along the axial direction of the fixed base ring 27, a straight rack 32 is mounted on one side of the sliding plate 31, a long gear 33 is meshed with the straight rack 32, the long gear 33 is rotatably connected with the fixed base ring 27, the long gear 33 is meshed with the inner gear ring 30, a first motor 34 is mounted on the fixed base ring 27, the output shaft of the first motor 34 is in transmission connection with the gear shaft of one of the long gear 33, and when the head of the cable initially enters the station of the extrusion embossing machine, manual guiding of the cable is required, the cable is smoothly wound on the winding drum through the embossing die, then the uniform transportation of the cable is completed through the matching of the winding drum and the paying-off drum, the cable can gradually enter an extrusion embossing machine to be embossed, specifically, a worker starts a first motor 34, the first motor 34 drives one of the long gears 33 to rotate, the long gears 33 drive the corresponding straight racks 32 to move, meanwhile, the inner gear ring 30 is driven to rotate, the inner gear ring 30 drives the other long gears 33 to rotate, the long gears 33 drive the corresponding straight racks 32 to move, the straight racks 32 drive the sector 28 to move through the sliding plate 31, the sector 28 is far away from the circle center of the fixed base ring 27 to move when the cable passes through, the diameter of an inscribed circle formed by the plurality of embossing gears 29 is larger than that of the copper pipe 5, the cable can smoothly pass through the embossing die, the cable of the copper pipe 5 is sleeved with the embossing die, the first motor 34 is reversed to reversely move and reset the segments 28, and the reset is completed after the segments 28 are contacted with each other, at this time, the embossing gear 29 deforms to extrude the copper pipe 5, the copper pipe 5 is embossed, then automatic production is carried out, the embossing gear 29 rotates, and the automatic embossing and extrusion of the copper pipe 5 are completed in cooperation with the conveying of the cable.
Example five
On the basis of the fourth embodiment, as shown in fig. 2 to 9, a transmission mechanism is arranged on the sliding plate 31 of each sector 28, the transmission mechanism comprises a first transmission shaft 35, a second transmission shaft 36 and arc teeth 37, the first transmission shaft 35 and the second transmission shaft 36 are both rotationally connected on the sliding plate 31, the axis of the first transmission shaft 35 is parallel to the axis of the embossing gear 29, the axis of the second transmission shaft 36 is parallel to the axis of the fixed base ring 27, an inverted T-shaped sliding strip 38 is fixed at the bottom of the arc teeth 37, the inverted T-shaped sliding strip 38 and the arc teeth 37 are coaxially arranged, an inverted T-shaped sliding groove 39 is formed on the sliding plate 31, the inverted T-shaped sliding strip 38 is slidingly matched in the inverted T-shaped sliding groove 39, a plurality of tooth grooves are uniformly formed on the inner ring of the arc teeth 37, a first gear 40 and a first bevel gear 41 are sleeved on the second transmission shaft 36, a second gear 42 and a second bevel gear 43 are sleeved on the first transmission shaft 35, the first gear 40 is meshed with the arc teeth 37, the first bevel gear 41 is meshed with the second bevel gear 43, the second gear 42 is meshed with the embossing gear 29, when the plurality of segments 28 are contacted to form an embossing ring, the plurality of arc teeth 37 are contacted to form a driving annular gear, the driving gear 44 is rotatably arranged on the fixed base ring 27, the driving gear 44 is meshed with the driving annular gear, the second motor 45 is arranged on the fixed base ring 27, an output shaft of the second motor 45 is in transmission connection with a shaft of the driving gear 44, the second motor 45 drives the driving gear 44 to rotate, the driving gear 44 drives the driving annular gear to rotate, each arc tooth 37 rotates, the arc tooth 37 drives the second transmission shaft 36 to rotate through the meshing of the first bevel gear 41 and the second bevel gear 43, the second transmission shaft 36 drives the first transmission shaft 35 to rotate, so as to change the transmission direction, the first transmission shaft 35 drives the embossing gears 29 to rotate through the second gears 42, so that the embossing gears 29 can be synchronously driven to rotate through one second motor 45, the setting of a power source is reduced, the synchronous precision of the embossing gears 29 is higher, the structure of the whole embossing die is more compact, and the cost is lower; it should be noted that the second motor 45 adopts a servo motor, which has higher rotation precision, and the arc teeth 37 can be reset when the second motor 45 rotates for a whole circle each time to stop the segments 28, so that when the cable is primarily threaded, the second motor 45 is in a stop state, and each segment 28 corresponds to one arc tooth 37 because the second motor 45 rotates for a whole circle to stop, the arc teeth 37 are in a reset state and can not be in an interlaced state, after the first motor 34 is started to stop the segments 28 moving for a certain distance away from the center of the circle of the fixed base ring 27, the multiple arc teeth 37 can be smoothly separated, and interference can not occur, so that each segment 28 can be independently moved to switch the working state, namely, the segments 28 are separated to perform cable threading operation, and the segments 28 are combined to perform cable embossing operation.
Further, as shown in fig. 4 to 9, an annular groove 46 is coaxially provided at the bottom of the ring gear 30, a plurality of mounting shafts 47 are uniformly distributed and fixed on the fixed base ring 27 along the axial direction of the annular groove 46, the top keys of the mounting shafts 47 are connected with bearings 48, the annular groove 46 comprises a large-width ring and a small-width ring which are communicated and arranged along the direction close to the mounting shafts 47, the mounting shafts 47 penetrate through the small-width ring to enable the bearings 48 to be in rotary fit in the large-width ring, the ring gear 30 is suspended and mounted through the mounting shafts 47 and the bearings 48, so that the sliding plate 31 cannot interfere with the ring gear 30 during movement, the annular groove 46 adopts a step structure, and the limit fixture of the ring gear 30 is completed through the cooperation of the bearings 48 and the large-width ring gear, so that the ring gear 30 can rotate stably, the arrangement of the bearings 48 ensures the rotational freedom between the ring gear 30 and the mounting shafts 47, and enables the movement of the ring gear 30.
Example six
On the basis of the fifth embodiment, as shown in fig. 2,3 and 10, the extrusion embossing machine further comprises a detachable base plate 49, a bolt plate 50 is fixed at the bottom of the fixed base ring 27, the bolt plate 50 is connected to the detachable base plate 49 through bolts, a strip-shaped mounting groove 51 is formed in the top of the embossing machine table 26, the strip-shaped mounting groove 51 extends to one end of the embossing machine table 26, the detachable base plate 49 slides into and is adapted to the strip-shaped mounting groove 51 from the opening end of the strip-shaped mounting groove 51, a plurality of embossing dies are mounted on the detachable base plate 49, the whole embossing die set can be replaced according to the size of a produced cable, and due to the fact that the cable needs and working environments are different, the diameters of the formed cable also have certain differences, and the embossing die set can be replaced correspondingly for the production of cables with different diameters, so that the whole extrusion embossing machine has interchangeability and can adapt to the production of cables with different sizes.
Further, the two sides of the detachable substrate 49 are both fixed with a limit bar 52, two side walls of the bar-shaped mounting groove 51 are both provided with limit grooves 53, the limit bar 52 is adapted to the limit grooves 53, the embossing machine 26 is provided with a baffle 54 at the open end of the bar-shaped mounting groove 51, the baffle 54 is connected with the embossing machine 26 through bolts, the baffle 54 is used for propping against the detachable substrate 49, the left-right movement freedom degree of the embossing mold is limited through the cooperation of the detachable substrate 49 and the bar-shaped mounting groove 51, the vertical movement freedom degree of the embossing mold is limited through the cooperation of the limit bar 52 and the limit grooves 53, the front-back movement freedom degree of the embossing mold is limited through the action of the baffle 54, so that the limit tooling of the embossing mold is completed from three directions, when the embossing mold set is replaced, the baffle 54 is directly detached from the open end of the bar-shaped mounting groove 51, then the detachable substrate 49 of a new embossing mold set is slid into the bar-shaped mounting groove 51, and finally the baffle 54 is assembled.
In summary, the high-performance coaxial cable can be produced by the above manufacturing method and manufacturing assembly, and the complex and severe environment is satisfied, specifically, as shown in fig. 1, a high-performance radio frequency coaxial cable comprises an inner conductor 1, an insulating layer 2 is wrapped on the inner conductor 1, a layer of PET film 3 is wrapped on the insulating layer 2 in a wrapping manner, a layer of flame-retardant tissue paper 4 is wrapped on the PET film 3 in a wrapping manner, a copper pipe 5 is sleeved on the flame-retardant tissue paper 4, the copper pipe 5 is embossed, and an outer sheath 6 is wrapped on the copper pipe 5.
Claims (10)
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| CN102361145A (en) * | 2011-08-30 | 2012-02-22 | 珠海汉胜科技股份有限公司 | Leakage coaxial cable of lapped braided outer conductor and production technology thereof |
| CN118213126A (en) * | 2024-05-21 | 2024-06-18 | 成都大唐线缆有限公司 | Temperature-resistant and moisture-proof radio frequency coaxial cable and production device |
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| WO2017013765A1 (en) * | 2015-07-22 | 2017-01-26 | 日立金属株式会社 | Coaxial cable and medical cable |
| WO2017036506A1 (en) * | 2015-08-31 | 2017-03-09 | Abb Schweiz Ag | Power transmission cable and process for the production of power transmission cable |
| CN208521634U (en) * | 2018-07-17 | 2019-02-19 | 安徽华菱新材料科技有限公司 | A kind of inflatable symmetrical communication cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361145A (en) * | 2011-08-30 | 2012-02-22 | 珠海汉胜科技股份有限公司 | Leakage coaxial cable of lapped braided outer conductor and production technology thereof |
| CN118213126A (en) * | 2024-05-21 | 2024-06-18 | 成都大唐线缆有限公司 | Temperature-resistant and moisture-proof radio frequency coaxial cable and production device |
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