37results about How to "Welding state is stable" patented technology

The invention discloses a welding device with a telescopic structure for agricultural machinery, which includes an anti-scalding workbench, an all-round telescopic welding device of an anti-splash high-energy fluorescent heat dissipation type, a pressure-touch induction safety multi-level tool storage device, a storage box and Height adjustment device. The invention belongs to the technical field of welding equipment, and specifically provides a principle based on the anti-Stokes effect, which uses a low-energy pump laser to excite a light receiver, and the light receiver emits high-energy fluorescence, which will directly contact with the welding arm The original energy of the light receiver is taken out of the welding arm and emitted to achieve the cooling effect, but the cooling efficiency of the light receiver is limited, so that the welding temperature of the welding arm will not be too low, adjust the welding arm to a suitable welding temperature, It can ensure the safety of the welding process of the staff and a better working environment. The telescopic welding arm can achieve the effect of all-round position change. It is a welding device with a telescopic structure for easy-to-use agricultural machinery.

The invention provides a necking detection and control method of melting electrode and electric arc welding in order to improve the detection precision of the necking during the melting of electrode and electric arc. The necking of droplets can be detected in a manner that the change of a resistance value between a melting electrode (1) and a base material (2) reaches to a necking detection reference value (Vtn). If necking is detected, the welding current is reduced, and output control can be conducted under the state of low current value, regenerating electric arc. The necking detection time is calculated from the detection time of the necking phenomenon to the regeneration of electric arc based on each short circuit. When the necking detection time is below a lower limit time, one is subtracted from a count value. When the necking detection time is above an upper limit time, one is added to the count value. When the count value reaches to a negative reference value, the necking detection reference value (Vtn) is reduced. When the count value reaches to a positive reference value, the necking detection reference value (Vtn) is increased. Accordingly, as the necking detection reference value (Vtn) can be appropriate, the detection precision of the necking can be improved.

The sucking pipe connection structure for rotary compressor includes casing, sucking pipe and adaptor. The casing has a through hole on one side and communicated to the sucking pipe and an inside closed space with cylinder with the sucking port; the sucking pipe penetrating the through hole in the casing is inserted into the sucking port of the cylinder; and the adaptor is set in the front of theconnecting pipe connected to a storage and has the insertion pipe inserted to transmit the work fluid from the storage to the sucking pipe. The casing with flange, the sucking pipe with flange and the adaptor with flange are connected through welding.

A squeezing detection control method is provided for consumable electrode arc welding in which a cycle of arc generation and short-circuiting is repeated between a consumable electrode and a base metal. First, squeezed droplet is detected as a premonitory sign of arc recurrence at the end of the short-circuiting. This detection is based on a fact that a squeeze detection reference value is attained by a differential value of the voltage or resistance between the consumable electrode and the base metal. Then, a welding current supplied to a short-circuit load is rapidly decreased upon detection of the squeezed droplet. Upon recurrence of the arc, the welding current is increased. This arc recurrence is detected by a fact that the differential value attains an arc recurrence reference value which is greater than the squeeze detection reference value.

The invention relates to a double-station automatic tooth palm welding and process grinding equipment and a welding method. For the current tricone or composite drill bit in the process of palm butt welding and surface surfacing, it is manually performed, the efficiency is low, and the technical demand for relying on human skills is very large, mainly through the welding robot for the two stations. The drill bits to be welded are welded in turn, and the drill bits to be welded at the two stations are polished in turn by the grinding mechanism. The beneficial effect of the present invention is that it has a certain degree of automation, one-time clamping, and automatically completes the automatic butt welding of two drill bits, which has the advantages of high production efficiency, stable welding state, and better protection for workers' health. .

The invention provides a forward and reverse feed AC arc welding method. In the forward and reverse feed AC arc welding method, the welding state is suppressed from becoming unstable by switching the electrode polarity. Forward and reverse feeding is performed by switching the wire feed speed (Fw) alternately between forward feed and reverse feed, and by switching the electrode polarity alternately between positive electrode polarity (EP) and negative electrode polarity (EN). In the AC arc welding method, switching of the electrode polarity (Spn) is set during a period in which the feed rate (Fw) in the forward period is decelerating. Thereby, since the electrode polarity (Spn) is switched at a constant phase of the feed rate (Fw), the molten state at the time of switching becomes constant, and thus the welding state is stabilized.