CN113871092B

CN113871092B - Flame-retardant wear-resistant torsion-resistant electromagnetic interference-resistant cable for robot body and production method

Info

Publication number: CN113871092B
Application number: CN202111043080.5A
Authority: CN
Inventors: 石磊; 卢柱; 应志鹏; 薛世鹏; 赵明; 邵志康; 朱杭忠
Original assignee: ZHEJIANG WANMA GROUP SPECIAL ELECTRON CABLE CO Ltd
Current assignee: ZHEJIANG WANMA GROUP SPECIAL ELECTRON CABLE CO Ltd
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2023-08-22
Anticipated expiration: 2041-09-07
Also published as: CN113871092A

Abstract

The invention discloses a flame-retardant wear-resistant torsion-resistant electromagnetic interference-resistant cable for a robot body and a production method thereof. The polypropylene foam yarn filling line is located in the center, six pairs of inner core wires are arranged around the inner polypropylene foam yarn filling line and twisted into a cable, polytetrafluoroethylene directional film wrapping belts are wrapped around the cable, copper foil wire shielding layers are wrapped in a unidirectional winding mode outside the wrapping belts, extrusion-level halogen-free conductive inner sheath shielding layers are wrapped outside the copper foil wire shielding layers, non-woven fabric wrapping belts are wrapped outside the halogen-free conductive inner sheath shielding layers, halogen-free flame-retardant polyurethane inner sheaths are wrapped outside the non-woven fabric wrapping belts, and transparent wear-resistant polyurethane outer sheaths are wrapped outside the polyurethane inner sheaths. The invention is used for the robot body data transmission cable in a complex electromagnetic environment, and has very high electromagnetic shielding effect to cope with the electromagnetic compatibility problem generated in the long-term torsion application process; the flame-retardant and high wear-resistant performance in the application process of a narrow space is achieved.

Description

Flame-retardant wear-resistant torsion-resistant electromagnetic interference-resistant cable for robot body and production method

Technical Field

The invention relates to a data transmission cable under an industrial field complex electromagnetic environment and a production method thereof, in particular to a flame-retardant wear-resistant torsion-resistant electromagnetic interference-resistant data transmission cable for a robot body and a production method thereof.

Background

Industrial robots are multi-joint manipulator devices having multiple degrees of freedom and operating according to predetermined program settings, and are widely used in fields such as automobile manufacturing, industrial automation, and industrial precision equipment. The industrial robot completes the work of assembly, paint spraying, grabbing, spot welding, displacement and the like by receiving the instruction of the computer and setting according to the instruction, and keeps stable, efficient, high-speed and accurate working state in the movement process. The information transmission is needed to be carried out by depending on the robot cable between the command sending and the robot receiving, and the cable structure and the running state determine that the cable is a main interference source under the complex electromagnetic environment of the industrial field and is more easily subjected to the electromagnetic interference of the external environment, so that the wear-resistant, weather-resistant and mechanical torsion stress-resistant adaptive capacity of the industrial robot cable can play a vital role in maintaining stable signal transmission capacity and ensuring the safety of the production field and the reliable running of the mechanical arm.

Because the industrial robot needs to adopt large-convolution axial torsion action operation in the practical application environment according to a given program, the metal winding shielding layer is subjected to torsion stress in the repeated motion process to be continuously opened and closed, so that the shielding effectiveness is reduced. The outer sheath of the cable for the industrial robot can be in direct contact with the equipment body, such as a nylon rotary shaft joint or a metal pipe body, so that the cable outer sheath is required to have excellent wear resistance and mechanical stress resistance, the service life of the cable is effectively prolonged, and meanwhile, the operation flexibility and the operation efficiency of the design of the robot can be further promoted.

Disclosure of Invention

In order to solve the problems in the background technology, the invention provides a flame-retardant wear-resistant torsion-resistant electromagnetic interference-resistant cable for a robot body and a production method thereof. The invention is used for the robot body data transmission cable in a complex electromagnetic environment, and has very high electromagnetic shielding effect to cope with the electromagnetic compatibility problem generated in the long-term torsion application process; the flame-retardant and high wear-resistant performance in the application process of a narrow space is achieved.

The invention adopts the following technical scheme:

1. flame-retardant wear-resistant torsion-resistant electromagnetic interference-resistant cable for robot body:

the anti-aging protective coating comprises polypropylene foam yarn filling yarns, copper-tin alloy wires, polytetrafluoroethylene directional film wrapping belts, copper foil wire shielding layers, halogen-free conductive inner sheath shielding layers, non-woven fabric wrapping belts, halogen-free flame-retardant polyurethane inner sheaths and transparent wear-resistant polyurethane outer sheaths; the polypropylene foam yarn filling wire is positioned at the center of the cable, a core wire is produced after a TPE mixture is extruded by a copper-tin alloy wire stranded conductor, two core wires are twisted in pairs to form an inner core wire, six inner core wires are arranged around the polypropylene foam yarn filling wire and twisted into the cable, namely, six pairs of core wires are twisted in pairs, polytetrafluoroethylene directional film wrapping tape is wrapped around the six pairs of core wires, copper foil wire shielding layers are wrapped outside the polytetrafluoroethylene directional film wrapping tape, a halogen-free conductive inner sheath shielding layer is extruded outside the copper foil wire shielding layers, a non-woven fabric wrapping tape is wrapped outside the halogen-free conductive inner sheath shielding layers, a halogen-free flame retardant polyurethane inner sheath is extruded outside the non-woven fabric wrapping tape, and a transparent wear-resistant polyurethane outer sheath is further extruded outside the halogen-free flame retardant polyurethane inner sheath.

The thickness of the copper-tin alloy wire is as follows: 0.08mm.

The TPE mixture is halogen-free, high in mechanical strength and low in dielectric constant, halogen-free means that halogen elements fluorine, chlorine, bromine and iodine are not contained in the material, and burning of human respiratory tract caused by release of halogen acid gas in the material combustion process is avoided. The high mechanical strength means that the breaking tensile strength is more than 30MPa, and the low dielectric constant means that the product is designed for a robot body encoder or high-frequency high-speed signal transmission, so that the insulating material not only needs to have high mechanical strength for long-term torsion application, but also has the characteristics of continuous stability and low delay in the high-frequency high-speed signal transmission process, and the relative dielectric constant of the material is 2.4-2.6, which is far lower than that of common insulating materials such as polyvinyl chloride, and is usually 3.2-3.8.

The TPE mixture is specifically a blend of chemical components of PP polypropylene as a hard segment and SEBS styrene-ethylene-butylene-styrene block copolymer as a soft segment, and PPO polyphenyl ether is added.

The halogen-free flame-retardant polyurethane inner sheath is prepared by mixing thermoplastic polyurethane, maleic anhydride grafted styrene elastomer, amino grafted styrene elastomer, ethylene acrylic ester copolymer and halogen-free high-efficiency expansion P-N (phosphorus nitrogen) compound flame retardant; the thermoplastic polyurethane, the maleic anhydride grafted styrene elastomer, the amino grafted styrene elastomer, the ethylene acrylic ester copolymer and the halogen-free high-efficiency expansion P-N (phosphorus nitrogen) compound flame retardant comprise the following components in percentage by mass: 40-50: 7-12: 3 to 5: 4-8: 15-30.

The transparent wear-resistant polyurethane outer sheath is prepared by mixing thermoplastic polyurethane, maleic anhydride grafted styrene elastomer, amino grafted styrene elastomer, ethylene acrylic ester copolymer and an anti-hydrolysis agent, wherein the mass ratio of the thermoplastic polyurethane to the maleic anhydride grafted styrene elastomer to the amino grafted styrene elastomer to the ethylene acrylic ester copolymer to the anti-hydrolysis agent is as follows: 55-65: 10 to 15: 5-8: 6-12: 1.2 to 1.8.

The mixture of the copper-tin alloy wire stranded conductor and the TPE forms a core wire structure; the copper foil wire shielding layer and the halogen-free conductive inner sheath shielding layer form a shielding structure; the halogen-free flame-retardant polyurethane inner sheath and the transparent wear-resistant polyurethane outer sheath form a sheath structure.

The cable is applied to data transmission.

2. A production method of a flame-retardant wear-resistant torsion-resistant electromagnetic interference-resistant cable for a robot body comprises the following steps:

the method comprises the following steps:

1) Preparing an inner core wire: the inner core wire is twisted by copper-tin alloy wires to prepare an inner conductor, and an insulating layer is prepared by coating a TPE mixture outside the copper-tin alloy wires, so that a core wire is formed;

2) Preparing twisted wires: the twelve core wires are grouped and twisted pairwise to form six inner core wires, each pair of wires is twisted by adopting a small pitch, and twisting pitches are distinguished, so that dislocation in the signal transmission process is ensured to avoid mutual crosstalk, all the inner core wires are produced in a untwisting mode, and torsion stress is completely eliminated;

the fine pitch refers to a twisted pair peak-to-peak spacing of about 8 times the outer diameter of the twist. The twisting pitch is distinguished, in particular, the pitch of each pair of wires is made to be different in design, the accuracy control of the twisting distance is guaranteed, and the occurrence probability of sound transmission between adjacent pairs of wires is reduced through the cross effect.

3) Preparing a finished cable: the polypropylene foam yarn filling yarns are positioned in the center, six pairs of inner core yarns are distributed around, the six pairs of inner core yarns are wrapped by polytetrafluoroethylene directional film wrapping belts to finish cabling, the twisting stress is eliminated by producing all the six pairs of inner core yarns in a untwisting mode during cabling, the inner pores of the six pairs of inner core yarns are completely filled tightly by the polypropylene foam yarns of the polypropylene foam yarn filling yarns after cabling is finished, and the six pairs of inner core yarns cannot shift;

the polypropylene foam yarn is formed by combining foamed polypropylene monofilaments, and is characterized in that the polypropylene foam yarn can be pressed to reduce the volume when pressed, and can be fluffy, dispersed and fixed into a cable internal structure after the pressure is released.

4) Preparing a metal shielding layer: the copper foil wire shielding layer is spirally coated on the cabling wires of the six pairs of internal core wires by adopting a winding process, the winding direction is consistent with the cabling direction, and the shielding rate is not less than 95%;

5) Preparing a halogen-free conductive inner sheath shielding layer: the halogen-free conductive inner sheath shielding layer is combined and overlapped with the metal copper foil wire shielding layer into a whole by adopting a melt extrusion process, and then the copper foil wire shielding layer is coated; then coating the non-woven fabric on the outside of the copper foil wire shielding layer;

6) Preparing a double-layer sheath: the halogen-free flame-retardant polyurethane inner sheath and the transparent wear-resistant polyurethane outer sheath are extruded once by adopting a parallel double extruder and are integrated into a whole, and then are coated outside the non-woven fabric coating.

In the step 5), the halogen-free conductive inner sheath shielding layer is dispersed and mixed in the SEBS elastomer copolymer by adopting superfine nickel zinc copper ferrite, wherein the mixing and adding proportion of the nickel zinc copper ferrite is 15% of the total mass of the SEBS elastomer copolymer and the nickel zinc copper ferrite, namely the mass content of the SEBS elastomer copolymer is 85%, the mass content of the nickel zinc copper ferrite is 15%, and the shielding effectiveness is 40-50 dB.

The SEBS elastomer copolymer of the mixed ferrite is tightly extruded in the copper foil wire shielding layer to be obtained by extrusion, the extrusion screw adopts 38 chromium molybdenum aluminum to increase the tungsten carbide coating, the cylinder body in the extrusion screw cylinder adopts double alloy tungsten carbide/nickel base alloy, so that the processing difficulty caused by ferrite can be avoided, and the service life of equipment is reduced.

In the step 6), the halogen-free flame-retardant polyurethane inner sheath adopts black, the material is characterized by halogen-free high flame retardance and high bending modulus, the transparent wear-resistant polyurethane outer sheath adopts transparent color, and the material is characterized by high oil resistance and friction resistance.

In the step 6), the inner polyurethane material and the outer polyurethane material are extruded once through double extrusion machines arranged in parallel, and after the extrusion of the halogen-free flame-retardant polyurethane inner sheath is finished, the transparent wear-resistant polyurethane outer sheath is extruded immediately when the surface is still in a soft state, so that the two layers of materials are integrated, and the section can be identified only through the color.

The innovation of the invention is that:

in general, the wire and cable can be directly woven or wound by using a metal shielding material in an electromagnetic compatibility technology, and the shielding effectiveness is good and the performance is stable in static operation, but the metal shielding structure can be opened and closed and displaced along with the metal shielding structure in a torsion motion state and is easy to break, so that the shielding effectiveness is reduced, and the reliability of signal transmission is reduced. According to the invention, the high-conductivity ultrafine ferrite material is added in the SEBS elastomer copolymer in a dispersing manner in the halogen-free conductive inner sheath shielding layer, and the high-conductivity ultrafine ferrite material is wrapped on the metal shielding layer in an extrusion manner to form a whole, so that the capability of the cable in resisting electromagnetic wave radiation interference and preventing digital communication information leakage in the robot torsion process is enhanced.

In order to enhance the bending and twisting resistant strength and the service life of the metal shielding layer, the invention adopts a copper foil wire material to replace the monofilament copper conductor as the metal shielding material. The copper foil wire structure is a hollow cylinder structure formed by spirally winding sheet copper foil outside polyester yarns, and internal stress can be released along the twisting direction when the structure is twisted, so that the structure has stronger bending resistance and twisting resistance compared with a solid cylinder structure of a monofilament copper conductor.

The cable sheath for the robot body needs to have the characteristics of flame retardance, wear resistance, weather resistance, high mechanical strength and the like, and in the practical application process, the material formula is difficult to balance due to the mutual restriction of comprehensive performance, and the overall cost of the material is increased while the performance is continuously stacked by codes.

According to the invention, the cable sheath for the robot body is divided into an inner layer and an outer layer, two sheath materials for forming the halogen-free flame-retardant polyurethane inner sheath and the transparent wear-resistant polyurethane outer sheath are prepared by adopting different treatment modes, the two layer material formulas are designed in a differentiated mode to respectively protrude independent characteristics, the inner layer is high in flame retardance and high in bending modulus, the outer layer is high in oil resistance and friction resistance, and the inner layer and the outer layer are extruded and fused simultaneously, so that the overall performance is integrated.

Drawings

FIG. 1 is a schematic diagram of a flame retardant, wear resistant, torsion resistant and electromagnetic interference resistant cable for a robot body according to the present invention;

in the figure: the novel anti-abrasion polyurethane foam yarn comprises a polypropylene foam yarn filling yarn (1), copper-tin alloy wires (2), a TPE mixture (3), polytetrafluoroethylene directional film wrapping tape (4), a copper foil wire shielding layer (5), a halogen-free conductive inner sheath shielding layer (6), a non-woven fabric wrapping tape (7), a halogen-free flame-retardant polyurethane inner sheath (8) and a transparent wear-resistant polyurethane outer sheath (9).

Detailed Description

The invention is further illustrated below with reference to examples.

As shown in fig. 1, the concrete implementation comprises a polypropylene foam yarn filling yarn 1, copper-tin alloy wires 2, a halogen-free TPE mixture 3 with high mechanical strength and low dielectric constant, polytetrafluoroethylene oriented film wrapping tape 4, a copper foil wire shielding layer 5, a halogen-free conductive inner sheath shielding layer 6, a non-woven fabric wrapping tape 7, a halogen-free flame-retardant polyurethane inner sheath 8 and a transparent wear-resistant polyurethane outer sheath 9; the polypropylene foam yarn filling wire 1 is positioned at the center, the copper-tin alloy wire stranded conductor 2 is extruded with the halogen-free TPE mixture 3 with high mechanical strength and low dielectric constant to produce core wires, the core wires are twisted in pairs to form six pairs, the six pairs are arranged around the polypropylene foam yarn filling wire 1 and twisted into a cable, the six pairs of core wires are coated with polytetrafluoroethylene oriented film wrapping tape 4, the polytetrafluoroethylene oriented film wrapping tape 4 is externally wound with a copper foil wire shielding layer 5, the copper foil wire shielding layer 5 is externally extruded with a halogen-free conductive inner sheath shielding layer 6, the halogen-free conductive inner sheath shielding layer 6 is externally wrapped with a non-woven fabric wrapping tape 7, the non-woven fabric wrapping tape 7 is externally extruded with a halogen-free flame retardant polyurethane inner sheath 8, and the halogen-free flame retardant polyurethane inner sheath 8 is externally extruded with a transparent wear-resistant polyurethane outer sheath 9.

The embodiment of the invention comprises the following steps:

step a:

preparing an inner core wire: the inner core wire is twisted by copper-tin alloy wires 2 to prepare an inner conductor, and a halogen-free TPE mixture 3 with high mechanical strength and low dielectric constant is selected to prepare an insulating layer;

step b:

preparing twisted wires: the twelve inner core wires are grouped for pairwise twisting, each pair of wires adopts a small pitch when being twisted, and the twisting pitches are distinguished, so that the dislocation in the signal transmission process is ensured to avoid mutual crosstalk, all the core wires are produced in a untwisting mode, and the torsion stress is completely eliminated;

step c:

preparing a finished cable: the polypropylene foam yarn filling yarn 1 is positioned in the center, six pairs of inner core yarns are distributed around, the six pairs of inner core yarns are wrapped by the polytetrafluoroethylene directional film wrapping tape 4 to finish cabling, the six pairs of inner core yarns are all produced in a untwisting mode to eliminate torsional stress during cabling, the six pairs of inner core yarns are completely and tightly filled with the polypropylene foam yarn filling yarn after cabling is finished, and the six pairs of inner core yarns cannot shift.

Step d:

preparing a metal shielding layer: the copper foil wire shielding layer 5 is spirally coated on the cabling wire by adopting a winding process, the winding direction is consistent with the cabling direction, and the shielding rate is not less than 95%;

step e:

preparing a halogen-free conductive inner sheath shielding layer: the halogen-free conductive inner sheath shielding layer 6 adopts superfine nickel zinc copper ferrite to be dispersed and mixed in the SEBS elastomer copolymer, the mixing proportion of the ferrite is 15 percent of the total amount, and the shielding effectiveness is 40-50 dB. The SEBS elastomer copolymer of the mixed ferrite is tightly extruded on the copper foil wire shielding layer, and in order to avoid the ferrite to cause processing difficulty and reduce the service life of equipment, a 38 chromium molybdenum aluminum added tungsten carbide coating is adopted for an extrusion screw, and a double alloy tungsten carbide/nickel base alloy is adopted for a cylinder body in an extrusion screw cylinder.

Then coating non-woven fabrics outside the copper foil wire shielding layer 5;

step f:

preparing a double-layer sheath: the halogen-free flame-retardant polyurethane inner sheath 8 adopts black, the material is characterized in that the halogen-free high flame-retardant high bending modulus is realized, the transparent wear-resistant polyurethane outer sheath 9 adopts transparent color, the material is characterized in that the oil resistance and the friction resistance are high, and the base materials of the inner layer polyurethane material and the outer layer polyurethane material are the same in resin. The inner and outer polyurethane materials are extruded once by a double extruder arranged in parallel, after the extrusion of the halogen-free flame-retardant polyurethane inner sheath 8 is completed, the transparent wear-resistant polyurethane outer sheath 9 is extruded immediately when the surface is still in a soft state, thereby ensuring that the two layers of materials are fused together, and the section can be identified only by color.

In this embodiment, the torsion test is performed according to TUV 2PfG 2577Annex G2D Torsion Test, the torsion angle is ±180°, the degree of freedom length of the sample is 0.5 meter, the test speed is 60 times/min, the transfer impedance test is performed according to TUV 2pfg 2577 after 1000 ten thousand continuous torsion tests, and the test results are as follows:

the test sample line transfer impedance test data before torsion test is 158mΩ/mAVG@30MHz, the transfer impedance test data after 1000 ten-thousand times torsion test is 182mΩ/mAVG@30MHz, the copper foil wire breakage rate is 32%, and the transfer impedance rises by 15.19% compared with the measurement data before torsion test.

In the embodiment, the sheath scraping test is carried out according to JB_T 10696.6, the test load is 1kg, the scraping stroke of angle iron is 250mm, the scraping speed is 0.1m/s, 2000 times of reciprocating scraping test are continuously carried out, and the thickness loss of the sheath epidermis is measured, wherein the test result is as follows:

the measurement size of the test sample wire before scraping is 9.0mm AVG, the measurement diameter of the test sample wire after 2000 times of load angle iron scraping tests is 8.8mm AVG, the loss of a scraping area is 0.2mm, and compared with the standard thickness of a standard sheath, the thickness of the test sample wire after scraping is 1.0mm, and the thickness of the angle iron after scraping test is reduced by 20%.

Comparative example 1

The method comprises the steps of winding a metal shielding layer by a single-layer copper foil wire and adding a halogen-free conductive inner sheath shielding layer, changing the winding of the double-layer copper foil wire, and changing the preparation of the double-layer sheath into the preparation of the single-layer sheath.

Step a:

step b:

step c:

Step d:

preparing a metal shielding layer: the copper foil wire shielding layer is spirally coated on the cabling wire by adopting a winding process, the winding direction is consistent with the cabling direction, and the shielding rate is not less than 95%; after the first layer is wound, winding the second layer of copper foil wire shielding layer again, wherein the shielding rate is not less than 95%;

then coating non-woven fabrics outside the copper foil wire shielding layer 5;

step e:

preparing a single-layer sheath: the formula of the halogen-free flame-retardant polyurethane sheath material needs to meet core indexes simultaneously, and the halogen-free oil-resistant high flame-retardant high bending modulus is achieved by adopting single-layer extrusion at one time.

the test sample line transfer impedance test data before torsion test is 146mΩ/mAVG@30MHz, the transfer impedance test data after 1000 ten-thousand times torsion test is 275mΩ/mAVG@30MHz, the test sample line is split to a metal shielding layer, the double-layer copper foil wire breakage rate is 32%, and the transfer impedance rises by 88.36% compared with the measurement data before torsion test.

the measurement size of the test sample wire before scraping is 9.0mm AVG, the measurement diameter after 2000 times of load angle iron scraping tests is 8.5mm AVG, the loss of a scraping area is 0.5mm, and compared with the standard thickness of a standard sheath, the thickness of the angle iron after scraping test is reduced by 50%.

Through the transfer impedance test analysis of the embodiment and the comparison example 1, the shielding effectiveness of the copper foil wire shielding layer composite halogen-free conductive inner sheath shielding layer scheme after the high-strength torsion test is determined, the shielding effectiveness is superior to that of a double-layer copper foil wire winding shielding layer, and the outstanding remarkable technical effect improvement is achieved.

Through the angle iron scraping test analysis of the embodiment and the comparison example 1, the wear resistance of adopting a double-layer sheath scheme and carrying out differential design on the formulas of inner and outer materials can be determined, and the wear resistance is superior to that of a single-layer sheath single-formula scheme, so that remarkable technical effect improvement is achieved.

The foregoing description is only one embodiment of the present invention and is not intended to limit the scope of the invention, but all equivalent changes or modifications in structure, characteristics, and principles of the present invention as defined in the appended claims are intended to be included in the present invention.

Claims

1. The utility model provides a robot is fire-retardant wear-resisting anti torsion anti electromagnetic interference cable for body which characterized in that:

comprises a polypropylene foam yarn filling thread (1), copper-tin alloy wires (2), polytetrafluoroethylene directional film wrapping tape (4), a copper foil wire shielding layer (5) the halogen-free conductive inner sheath shielding layer (6), a non-woven fabric belting (7), a halogen-free flame-retardant polyurethane inner sheath (8) and a transparent wear-resistant polyurethane outer sheath (9);

the method comprises the steps that a polypropylene foam yarn filling wire (1) is positioned in the center of a cable, a copper-tin alloy wire (2) is extruded out of a TPE mixture (3) to produce core wires, two core wires are twisted in pairs to form an inner core wire, six inner core wires are arranged around the polypropylene foam yarn filling wire (1) and twisted into the cable, polytetrafluoroethylene directional film wrapping belts (4) are wrapped around the six pairs of core wires, a copper foil wire shielding layer (5) is wrapped outside the polytetrafluoroethylene directional film wrapping belts (4), a halogen-free conductive inner sheath shielding layer (6) is extruded outside the copper foil wire shielding layer (5), a non-woven fabric wrapping belt (7) is wrapped outside the halogen-free conductive inner sheath shielding layer (6), a halogen-free flame-retardant polyurethane inner sheath (8) is extruded outside the non-woven fabric wrapping belt (7), and a transparent wear-resistant polyurethane outer sheath (9) is extruded outside the halogen-free flame-retardant polyurethane inner sheath (8);

the copper foil wire structure of the copper foil wire shielding layer (5) is a hollow cylinder structure formed by spirally winding a sheet copper foil outside polyester wires;

the halogen-free conductive inner sheath shielding layer (6) is formed by dispersing and mixing nickel-zinc-copper ferrite in an SEBS elastomer copolymer, wherein the mixing proportion of the nickel-zinc-copper ferrite is 15% of the total mass of the SEBS elastomer copolymer and the nickel-zinc-copper ferrite, and the shielding effectiveness is 40-50 dB.

2. The flame-retardant, wear-resistant, torsion-resistant and electromagnetic interference-resistant cable for a robot body according to claim 1, wherein: the TPE mixture (3) is specifically a blend of chemical components of PP polypropylene as a hard segment and SEBS styrene-ethylene-butylene-styrene block copolymer as a soft segment, and PPO polyphenyl ether is added.

3. The flame-retardant, wear-resistant, torsion-resistant and electromagnetic interference-resistant cable for a robot body according to claim 1, wherein: the halogen-free flame-retardant polyurethane inner sheath (8) is prepared by mixing thermoplastic polyurethane, maleic anhydride grafted styrene elastomer, amino grafted styrene elastomer, ethylene acrylic ester copolymer and halogen-free high-efficiency expansion P-N compound flame retardant; the thermoplastic polyurethane, the maleic anhydride grafted styrene elastomer, the amino grafted styrene elastomer, the ethylene acrylic acid ester copolymer and the halogen-free high-efficiency expansion P-N compound flame retardant comprise the following components in percentage by mass: 40-50: 7-12: 3-5: 4-8: 15-30.

4. The flame-retardant, wear-resistant, torsion-resistant and electromagnetic interference-resistant cable for a robot body according to claim 1, wherein: the transparent wear-resistant polyurethane outer sheath (9) is prepared by mixing thermoplastic polyurethane, maleic anhydride grafted styrene elastomer, amino grafted styrene elastomer, ethylene acrylic ester copolymer and an anti-hydrolysis agent, wherein the mass fraction ratio of the thermoplastic polyurethane, the maleic anhydride grafted styrene elastomer, the amino grafted styrene elastomer, the ethylene acrylic ester copolymer and the anti-hydrolysis agent is as follows: 55-65: 10-15: 5-8: 6-12: 1.2-1.8.

5. The flame-retardant, wear-resistant, torsion-resistant and electromagnetic interference-resistant cable for a robot body according to claim 1, wherein:

the copper-tin alloy wire (2) and the TPE mixture (3) form a core wire structure; the copper foil wire shielding layer (5) and the halogen-free conductive inner sheath shielding layer (6) form a shielding structure; the halogen-free flame-retardant polyurethane inner sheath (8) and the transparent wear-resistant polyurethane outer sheath (9) form a sheath structure.

6. The application of the flame-retardant, wear-resistant, torsion-resistant and electromagnetic interference-resistant cable for the robot body according to claim 1, wherein the cable is characterized in that: the cable is applied to data transmission.

7. The production method of the flame-retardant, wear-resistant, torsion-resistant and electromagnetic interference-resistant cable applied to the robot body as claimed in any one of claims 1 to 5 is characterized in that:

the method comprises the following steps:

1) Preparing an inner core wire: the inner core wire is twisted by copper-tin alloy wires (2) to prepare an inner conductor, and an insulating layer is prepared by coating a TPE mixture (3) outside the copper-tin alloy wires (2), so that a core wire is formed;

2) Preparing twisted wires: grouping twelve core wires into groups, twisting the groups two by two to form six inner core wires, wherein each pair of core wires adopts a small pitch when twisted, and distinguishing twisting pitches, and all the inner core wires are produced in a untwisting mode;

3) Preparing a finished cable: the polypropylene foam yarn filling yarn (1) is positioned in the center, six pairs of inner core yarns are distributed around, the six pairs of inner core yarns are wrapped by a polytetrafluoroethylene directional film wrapping tape (4) to finish cabling, all the six pairs of inner core yarns are produced in a untwisting mode during cabling, and the inner pores of the six pairs of inner core yarns are completely and tightly filled with the polypropylene foam yarn of the polypropylene foam yarn filling yarn (1) after cabling is finished;

4) Preparing a metal shielding layer: the copper foil wire shielding layer (5) is spirally coated on the cabling wires of the six pairs of internal core wires by adopting a winding process, and the winding direction is consistent with the cabling direction;

5) Preparing a halogen-free conductive inner sheath shielding layer: the halogen-free conductive inner sheath shielding layer (6) and the copper foil wire shielding layer (5) are compositely overlapped into a whole by adopting a melt extrusion process; then coating and manufacturing non-woven fabrics outside the copper foil wire shielding layer (5);

6) Preparing a double-layer sheath: the halogen-free flame-retardant polyurethane inner sheath (8) and the transparent wear-resistant polyurethane outer sheath (9) are extruded and fused into a whole by adopting a parallel double extruder, and then are coated outside the non-woven fabric tape (7).

8. The method for producing the flame-retardant, wear-resistant, torsion-resistant and electromagnetic interference-resistant cable for the robot body according to claim 7, wherein the method comprises the following steps of: in the step 5), the halogen-free conductive inner sheath shielding layer (6) is dispersed and mixed in the SEBS elastomer copolymer by adopting nickel zinc copper ferrite, the mixing and adding proportion of the nickel zinc copper ferrite is 15% of the total mass of the SEBS elastomer copolymer and the nickel zinc copper ferrite, and the shielding effectiveness is 40-50 dB.

9. The method for producing the flame-retardant, wear-resistant, torsion-resistant and electromagnetic interference-resistant cable for the robot body according to claim 7, wherein the method comprises the following steps of: in the step 6), the inner polyurethane material and the outer polyurethane material are extruded once through double extrusion machines arranged in parallel, and after the extrusion of the halogen-free flame-retardant polyurethane inner sheath (8) is finished, the transparent wear-resistant polyurethane outer sheath (9) is extruded immediately when the surface is still in a soft state, so that the two layers of materials are fused into a whole.