A hand-held high-speed electric arc processing equipment and method

Abstract

The invention discloses handheld high-speed electric arc machining equipment and method, and belongs to the field of non-traditional machining equipment. The handheld high-speed electric arc machining equipment comprises a shell, a motor, a coupler, a spindle, a connection flange, an amplitude transformer, a protection cover, an electric brush, a conductive grinding wheel, a handle, an ultrasonic generator and an electric arc machining control power supply. The motor drives the spindle to rotate via the coupler. The amplitude transformer penetrates through the lower end of the shell and is fixedly connected with the conductive grinding wheel in an insulation manner. The spindle drives the amplitude transformer to rotate via the connection flange. Amplitude and vibrating frequency of the amplitude transformer are adjusted via the ultrasonic generator. The conductive grinding wheel is connected with a cathode of the electric arc machining control power supply via the electric brush. Three machining modes including high-speed electric arc machining, ultrasonic vibrating and grinding are combined, and by means of combining the machining modes, and a material removal rate of the handheld high-speed electric arc machining equipment can reach 6-8 times of that of normal electrosparking, and even more than 10 times for parts of materials, so that the handheld high-speed electric arc machining equipment is quite applicable to onsite repairing and machining for surface fatigue layers of parts of large and non-movable waste machines.

Description

technical field [0001] The invention relates to a special processing equipment and method, in particular to a hand-held high-speed arc processing equipment and method. Background technique [0002] At present, key parts such as high-speed wire rolls, cold-rolled work rolls, oil drill pipe wear-resistant belts and slurry pumps have become an important part of equipment maintenance and remanufacturing due to their high added value. When repairing and remanufacturing such parts, the surface fatigue layer must be removed first, and then various high-tech methods are used to repair the surface, and finally the surface geometry is restored by machining to make it reach the machining accuracy and meet the requirements of use. Require. The repair processing of this type of parts usually has the following three characteristics: (1) The surface of this type of parts is usually heat-treated, which has the characteristics of high hardness, wear resistance, and corrosion resistance, whi...

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Problems solved by technology

The repair processing of this type of parts usually has the following three characteristics: (1) The surface of this type of parts is usually heat-treated, which has the characteristics of high hardness, wear resistance, and corrosion resistance, which brings great benefits to the removal of the surface fatigue layer. Difficulties

(2) Such parts are usually large in size, heavy in weight, and difficult to clamp, and their maintenance and remanufacturing are mainly on-site processing

(3) When some mechanical equipment is used outdoors, impurities such as rust, slag, and concrete adhere to the surface of the parts very firmly, which further increases the difficulty of removing the metamorphic layer on the surface

However, at present, high-speed arc machining is still difficult to apply to the on-site machining of fatigue layers on the surface of large or immovable parts. During the processing, there are difficulties such as time-consuming clamping, low efficiency, and difficult operation

(2) In the traditional high-speed arc processing equipment, the tool electrode and the workpiece electrode are fixed on the base or the support frame, and the discharge gap is usually controlled by the automatic feed control system, which is easy to realize; but it is difficult for this type of equipment to be hand-held It is not conducive to the on-site repair of large non-movable parts (the discharge gap is too large, the insulating medium is not easy to break down, and it is difficult to form a discharge channel; the discharge gap is too small, and it is easy to short circuit and damage the equipment)

(3) For some field operation equipment, impurities such as rust, slag and concrete firmly adhering to the surface of the parts are usually non-conductive, and it is difficult to process them with high-speed arc processing methods

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