Integrated pin tool for friction stir welding and composite method of resistance-friction stir welding thereof
A technology of friction stir welding and friction stir, applied in the direction of resistance welding equipment, welding equipment, welding medium, etc., can solve the problems of high material preparation cost of the stirring head, difficulty in welding high melting point metals, high cost of the stirring head, etc., and achieve high-quality welded joints , improve service life, prevent oxidation and inclusion effects
Inactive Publication Date: 2009-09-23
CHONGQING UNIV
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[0007] In view of the above-mentioned deficiencies existing in the existing friction stir technology, the purpose of the present invention is to provide a system integrating temperature control, parameter detection, gas protection, separate replaceable stirring needle and shaft shoulder, keyhole-free welding system, etc. The integrated intelligent friction stir welding stirring head, and a kind of internal resistance heat, with gas protection, internal liquid medium forced circulation cooling temperature control, automatic temperature sensing detection, stirring needle and shoulder can be replaced separately, without The keyhole resistance-friction stir hybrid welding method is used for the effective friction stir welding process of high melting point metals and the improvement of low melting p
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example 1
[0082] Example 1: Use this stirring head to conduct current-carrying friction stir welding of 3.2mm thick Q345R steel. The welding process parameters are as follows: digital arc welding DC power supply is used to provide auxiliary current, the auxiliary DC current is 400-800A, and the rotation speed of the stirring head is 800- 2000rmp, welding speed 60-200mm / min, argon protection 10-30L / min, down force 30-50kN.
[0083] The principle of determining the welding specification is: the form, shape, and size of the welding structure should be considered comprehensively, and reasonably matched with the welding process parameters, and the main process parameters of the welding should be optimized according to the actual welding objects and materials. At the same time, the external power supply should be considered. The impact of the heat input on the welding process, the reasonable and effective distribution and combination of friction heat and resistance heat, can ensure high-qualit...
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The invention discloses an integrated pin tool used for friction stir welding and a composite method of resistance-friction stir welding thereof. The pin tool comprises a pin tool body arranged on a friction welder and a tool pin arranged at the lower part of the tool pin body which is connected with the welder in a clamping and insulating manner; the pin tool also comprises a forced cooling system, a current carrying system, a gas shielding system, a temperature sensing and detecting system, a sealing and insulation system, an inner shaft shoulder and the tool pin, and is an integrated pin tool which has the functions of gas shielding, forced circulation cooling of internal liquid medium, automatic temperature sensing and detection, tool pin changing and composite non-keyhole resistance-friction stir welding. The invention overcomes the difficulty of friction stir welding of the high melting point metal and meets the harsh technical requirements of the friction stir welding of the low melting point metal, improves the quality of welding joints, prolongs the service life of the pin tool and realizes the friction stir welding of high melting point metal and low melting point light alloy, with low cost, high efficiency and excellent quality.
Description
technical field [0001] The invention relates to the field of welding technology, in particular to an integrated stirring head for friction stir welding and a resistance stir friction composite welding method. Background technique [0002] In 1991, the British Welding Institute (TWI) invented the friction stir welding technology and obtained a patent authorization in China (ZL95192193.2). This new welding technology derived from the mechanical cold processing manufacturing process and based on solid phase bonding has obvious advantages It has become one of the welding technologies that have been rapidly developed and widely used in engineering in the world in the past two decades. The industrial application of friction stir welding is mainly concentrated in the field of aluminum alloys. With the continuous expansion of its application fields, connecting objects and materials, friction stir welding technology has been successfully expanded in non-ferrous metals with low meltin...
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Login to view more IPC IPC(8): B23K28/02B23K20/12B23K11/00B23K20/26B23K20/14F16J15/32B23K35/38B23K20/24B23K20/22C22F1/00C21D7/13
Inventor 罗键王颖
Owner CHONGQING UNIV
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