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公开(公告)号：US3860778A
公开(公告)日：1975-01-14
申请号：US44937174
申请日：1974-03-08
Applicant: THERMATOOL CORP
Inventor： RUDD WALLACE C , UDALL HUMFREY N
CPC classification number: B23K13/043 , B23K11/11 , B23K13/00
Abstract: Methods and apparatus for producing melt welds between a plurality of metal parts in which a high frequency current is caused to flow between two areas on opposite sides of the desired melt weld for a time sufficient to melt the metal between such areas, the molten metal then being permitted or caused to cool. The frequency of the current is selected in relation to the characteristics, both electrical and mechanical, of the parts to be welded and so as to provide a current magnitude which will not cause expulsion of the molten metal by reason of the motor effect. The current frequency is selected to be at least high enough to provide an effective resistance of the metal which is at least equal to the contact resistance between the parts. The apparatus may include high temperature insulating material for confining the molten metal, proximity conductor means for influencing the current path and/or magnetic means adjacent the current path for concentrating the current.
Abstract translation: 在多个金属部件之间产生熔融焊接的方法和装置，其中使高频电流在期望的熔体焊接的相对侧上的两个区域之间流动足够的时间，以熔化这些区域之间的金属，然后熔融金属 被允许或导致冷却。 相对于被焊接部件的电气和机械特性来选择电流的频率，并且提供不会由于电动机效应而导致熔融金属排出的电流大小。 当前频率被选择为至少足够高以提供至少等于部件之间的接触电阻的金属的有效电阻。 该装置可以包括用于限制熔融金属的高温绝缘材料，用于影响电流路径的接近导体装置和/或邻近电流路径的磁性装置，用于集中电流。
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公开(公告)号：KR840001978B1
公开(公告)日：1984-10-26
申请号：KR800002260
申请日：1980-06-09
Applicant: THERMATOOL CORP
Inventor： UDALL HUMFREY N
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公开(公告)号：DE2951594A1
公开(公告)日：1981-07-02
申请号：DE2951594
申请日：1979-12-21
Applicant: THERMATOOL CORP
Inventor： RUDD WALLACE C , UDALL HUMFREY N
Abstract: Metal parts are welded and heat treated using an electric arc formed between a pair of adjacent parts or between an electrode and a metal part. The arc is traversed over the metal part(s) using a magnetic field. The arc can be initiated, driven by the magnetic field across the parts, extinguished and then reinitiated. Alternatively, the arc can traverse the surfaces of the parts in alternately opposite directions. Uniform heating can be effected to surfaces which are larger than the cross-section of the impinging arc. Discontinuous surfaces can be heated with repeated passes of the arc. The arc may be d.c. or a.c. and the magnetic field may be constant or variable in both magnitude and polarity.
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公开(公告)号：CA981760A
公开(公告)日：1976-01-13
申请号：CA211373
申请日：1974-10-15
Applicant: THERMATOOL CORP
Inventor： RUDD WALLACE C , UDALL HUMFREY N
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公开(公告)号：DE2453579A1
公开(公告)日：1975-09-11
申请号：DE2453579
申请日：1974-11-12
Applicant: THERMATOOL CORP
Inventor： RUDD WALLACE C , UDALL HUMFREY N
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Patent Agency Ranking6.发明专利
公开(公告)号：CA1133588A
公开(公告)日：1982-10-12
申请号：CA387834
申请日：1981-10-13
Applicant: THERMATOOL CORP
Inventor： RUDD WALLACE C , UDALL HUMFREY N
IPC: B23K9/08
Abstract: METHODS AND APPARATUS FOR HEATING METAL PARTS WITH MAGNETICALLY DRIVEN TRAVELLING ELECTRIC ARC Methods and apparatus for the welding and heat treating of metal parts in which an electric arc extends between a pair of adjacent metal parts or between an electrode and one or more metal parts with the arc traversing the metal part or parts a plurality of times during the heating cycle. For finite length metal parts, i.e. whenthe surface or surfaces to be heated do not provide closed paths to be followed by the arc, the arc is initiated, caused to follow the surface, extinguished and then reinitiated, ox is caused to traverse the surfaces in alternately opposite directions after initiation. With finite length metal parts, run-off tabs are provided at the ends of the surfaces to prevent overheating at such ends. A magnetic field causes the arc to traverse the surfaces and may be modified in strength or distribution to vary traverse rate. Also, by varying the magnetic field path, by superimposing another magnetic field or by gas pressure, the arc may be caused to follow paths which traverse entire surfaces even though arc cross-section is less than the width of surfaces. The arc may be direct or alternating current and the magnetic field may be constant or variable in both magnitude and polarity. Sensors responsive to arc position may be used to control reversal of direction of arc movement, arc speed, magnetic field, etc.
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公开(公告)号：DE2920277A1
公开(公告)日：1980-01-24
申请号：DE2920277
申请日：1979-05-18
Applicant: THERMATOOL CORP
Inventor： RUDD WALLACE C , UDALL HUMFREY N
Abstract: A method and apparatus for modifying the surface properties of a metal part in which electric current having a frequency of at least 3000 Hz is supplied to a narrow area on the part by means of contacts, one at each end of the area, and a proximity conductor or is induced therein by an induction coil until the metal in the area reaches a temperature at least equal to its melting temperature. A material which will alloy with the metal of the part is added to the molten metal so that when the molten metal is cooled an area of an alloy of the metal and the added material is produced. The added material may be in the form of a gas, powder, salt, wire, rod, bar, foil, etc. and may be applied to the area before, during, or after the melting of the metal of the area. The spacing between the proximity conductor or the induction coil and the work is no greater than three times the width of the proximity conductor or the coil conductor.
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公开(公告)号：CA1124335A
公开(公告)日：1982-05-25
申请号：CA332900
申请日：1979-07-31
Applicant: THERMATOOL CORP
Inventor： RUDD WALLACE C , UDALL HUMFREY N
Abstract: ELECTRICAL CONTACT APPARATUS FOR HIGH FREQUENCY WELDING Apparatus for supporting and feeding high frequency electric current to a pair of contacts for engaging a work piece or pieces and supplying current thereto in which a co-axial line has relatively movable inner and outer conductors with a pair of contacts respectively mounted at one end of each conductor, electric current being supplied to the conductors adjacent the other ends of the conductors. In one embodiment, the conductors are rotatable and the contacts are mounted on radially extending arms secured to the ends of the conductors. In other embodiments, one conductor is rotatable and the other conductor is axially movable, one contact being mounted on a radially extending arm secured to the rotatable conductor and the other contact being secured to the end of the axially movable conductor. Also, flexible lead and conductive bearing current feed systems and contact mounting arms which are readily convertible into an induction coil support.
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公开(公告)号：CA1119898A
公开(公告)日：1982-03-16
申请号：CA324492
申请日：1979-03-30
Applicant: THERMATOOL CORP
Inventor： RUDD WALLACE C , UDALL HUMFREY N
Abstract: A method and apparatus for modifying the surface properties of a metal part in which electric current having a frequency of at least 3000 Hz is supplied to a narrow area on the part by means of contacts, one at each end of the area, and a proximity conductor or is induced therein by an induction coil until the metal in the area reaches a temperature at least equal to its melting temperature. A material which will alloy with the metal of the part is added to the molten metal so that when the molten metal is cooled an area of an alloy of the metal and the added material is produced. The added material may be in the form of a gas, powder, salt, wire, rod, bar, foil, etc. and may be applied to the area before, during, or after the melting of the metal of the area. The spacing between the proximity conductor or the induction coil and the work is no greater than three times the width of the proximity conductor or the coil conductor.
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公开(公告)号：CA1133589A
公开(公告)日：1982-10-12
申请号：CA349167
申请日：1980-04-03
Applicant: THERMATOOL CORP
Inventor： UDALL HUMFREY N
Abstract: HIGH FREQUENCY CURRENT WELDING OF METAL STRIP TO A METAL PART Method and apparatus for welding a metal part, e.g. a tube or strip, to a thin, flexible metal strip using high frequency electric currents in which the part and strip are continuously advanced to a weld point where they are pressed together. In advance of the weld point, high frequency current is supplied to the part and the strip through contacts engaging them so that portions thereof are heated to welding temperature by the time they reach the weld point. From the point of engagement of the contact with the strip or strips to the weld point the strip material is maintained in a fixed path by a rigid member against which the strip is pressed by tensioning the strip with a pad frictionally engaging the strip. If desired, the current may be fed to the contact engaging the part through a proximity conductor to increase the heating of the part relative to the strip.
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