Ultra-soft cable for robot arm and processing method of ultra-soft cable

Abstract

The invention relates to an ultra-soft cable for a robot arm. The ultra-soft cable comprises one or more layers of insulating cable cores. A sheath layer is manufactured on the exterior of the outermost layer of insulating cable cores. Each insulating cable core comprises conductors and an insulating layer. The ultra-soft cable is characterized in that an unoriented polytetrafluoroethylene film coats the exterior of each layer of insulating cable cores, so that sliding film layers can be formed. The invention also relates to a processing method of the ultra-soft cable for the robot arm. According to the ultra-soft cable for the robot arm of the invention, the unoriented polytetrafluoroethylene films are arranged between each layer of cable cores in a wrapping manner, and therefore, the ultra-soft cable for the robot arm has high flexibility and a long service life, can withstand bending and twisting of more than ten million times, and can be applied to the joints of robot arms which perform high-speed bending and torsion.

Description

technical field [0001] The invention relates to the field of cables for robots, in particular to an ultra-soft cable for robot arms and a processing method thereof. Background technique [0002] With the rapid development of the robot manufacturing industry, the matching wires and cables for robots have also developed rapidly. The current robot cable market has shown a variety of varieties, but due to the rapid development of robot technology, its requirements for cable flexibility are getting higher and higher, so the market is in urgent need of super soft robot arm cables for high-speed movement of robots parts. [0003] Chinese invention patent (CN107680721A) discloses a high temperature and high pressure ultra-flexible cable for new energy vehicles, which includes a conductor, an insulating layer, a polyester tape, a braided shielding layer, an aluminum foil shielding layer, a sheath, and a braided layer. The conductor, insulating layer, polyester tape, braided shieldi...

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Problems solved by technology

[0005] In addition, the super-flexible cables in the prior art also have the following problems: using ultra-fine copper wires as conductors, although their electrical conductivity is very good, the mechanical strength of the annealed copper wires is not high, which causes the cables to be damaged repeatedly during use. Under tension, the conductor becomes thinner, which reduces the conductivity and even causes fatigue fracture

When using fine copper wire stranded conductors at the same time, the soft copper conductors are easy to break when stranded, and the electrical conductivity of the cable is seriously reduced when hard copper wires are stranded, and the hard copper wires have poor bending resistance and are easier to bend break in process

Since the stranding of small cross-section conductors generally adopts the high-speed bundle stranding method, the torsional stress of the conductor single wire remains after stranding, which will reduce the service life of the conductor during repeated bending use, especially in the conditions of repeated bending use of robot arm cables. , can not meet the needs of use

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