648results about How to "Efficient welding" patented technology

The atmospheric corrosion resistant steel with yield strength of 700 MPa level has the chemical composition comprising C 0.05-0.10 wt%, Si not more than 0.50 wt%, Mn 0.8-1.6 wt%, P not more than 0.020 wt%, S not more than 0.010 wt%, Al 0.01-0.05 wt%, Cu 0.20-0.55 wt%, Cr 0.40-0.80 wt%, Ni 0.12-0.40 wt%, Ca 0.001-0.006 wt%, N 0.001-0.006 wt% and Fe and inevitable impurity for the rest. Its production process includes the following steps: 1. smelting and casting to form steel billet; 2. heating the steel billet to over 1200 deg.c, finish rolling at 950 deg.c in the final temperature lower than 910 deg.c and lowered with the increased plate thickness; and 3. cooling in the rate of 5-15 deg / s to 450-650 deg.c, winding and air cooling to room temperature. The atmospheric corrosion resistant steel has excellent comprehensive mechanical performance, yield strength over 700 MPa, high weather resistance and other advantages.

A cable connector compatible to type-A USB 3.0 standard includes a number of contacts divided into a first contact group and a second contact group. The first contact group is compatible to USB 2.0 standard. The second contact group includes a number of second contacts having a first pair of high-speed differential signal contacts, a second pair of high-speed differential signal contacts and a grounding contact disposed between the first pair and the second pair of high-speed differential signal contacts. The second soldering section of the grounding contact is of a forked manner and includes at least a first branch and a second branch. As a result, it is more effective to solder the second soldering section of the grounding contact with a cable without any manual alignment work.

The invention provides a laser-arc composite welding device based on heat input control and a welding method. The laser-arc composite welding device based on the heat input control comprises a laser device, a laser head, an arc-welding power supply, a main consumable-electrode welding gun and a wire feeding mechanism and also comprises a bypass welding gun and a rheostat, wherein the laser head is connected with the laser device, the laser head is arranged above a workpiece, the main consumable-electrode welding gun and the bypass welding gun are symmetrically placed at both sides of a laser beam formed by the laser head, the main consumable-electrode welding gun is connected with the positive pole of the arc-welding power supply, the electrifying end of the workpiece is connected with the negative pole of the arc-welding power supply, and the bypass welding gun is connected with the negative pole of the arc-welding power supply by the rheostat. According to the laser-arc composite welding device based on the heat input control and the welding method, the welding heat input of a composite laser-arc heat source can be controlled, the heat affected zone and the welding deformation are reduced, and the metallurgical performance and the microstructure of a welding seam are improved. The laser-arc composite welding device based on the heat input control and the welding method not only are suitable for the fusion welding of homogeneous metal but also are suitable for the braze (fusion) welding of dissimilar metal, such as aluminum or steel and magnesium or steel.

The invention provides a heterogeneous semi-solid brazing method for an aluminum alloy and a magnesium alloy under assistance of external vibration energy. According to the invention, the method comprises the following steps of: clamping an aluminum alloy weld member and a magnesium alloy weld member on a fixture and placing medium-temperature brazing filler metals of a Zn-Al or Al-Si series on two surfaces to be welded, wherein the brazing filler metals can be of flaky shapes or foil shapes, can be plating layers or can be sprayed on the surfaces to be welded in advance; heating the weld members so that the middle layer of brazing filler metal is in a semi-solid state; adjusting the pressure to be matched with the amplitude of the applied vibration; starting a vibrating device with amplitude of 0.01-2mm, wherein the brazing filler metals vibrate along with the two weld members, and the vibration time is 0.5-3 minutes according to actual requirements; stopping the vibration; and cooling the weld members to room temperature by air, wherein a certain pressure of 0.1-5 Mpa is always applied in the brazing process. According to the invention, high-efficiency, high-quality and economic connection between the aluminum alloy and the magnesium alloy can be realized.

The invention discloses a battery core of a spiral lithium ion battery, and a spiral lithium ion battery containing the battery core. The spiral lithium ion battery comprises a battery housing, and a spiral battery core and a battery upper cap positioned in the battery housing. The battery core comprises an anode sheet, a cathode sheet, a separating film, an anode flow concentrating plate, and a cathode flow concentrating plate. The upper end of the anode sheet and the lower end of the cathode sheet are provided with uncoated blank bands. After the anode sheet and the cathode sheet are separated by using the separating film and are rolled, the lower surface of the anode flow concentrating plate firmly contacts the circular blank band formed on the anode sheet, and the upper surface of the cathode flow concentrating plate firmly contacts the circular blank band formed on the cathode sheet. The anode flow concentrating plate is electrically connected to the upper cap of the battery. The cathode flow concentrating plate is electrically connected to the housing. The battery provided by the invention is advantaged in small internal resistance, uniformly distributed current, and long service life. The battery is especially suitable for power batteries of electric cars and the like.

The invention discloses a rear floor assembly structure for a plug-in hybrid electric vehicle, which comprises a rear-floor front part and a rear-floor rear part, wherein a left side longitudinal beam and a right side longitudinal beam extending to the downside of the rear-floor rear part are respectively arranged on the two sides of the downside of the rear-floor front part, a cross beam is connected between the left side longitudinal beam and the right side longitudinal beam below the rear-floor front part and is connected with a fuel tank and an exhaust pipe muffler, a battery compartment is arranged on the rear-floor rear part between the left side longitudinal beam and the right side longitudinal beam, a battery pack is hung above the battery compartment, the front end of the battery pack is connected with a battery cooling system, and the battery cooling system is fixed above the rear-floor front part. According to the rear floor assembly structure, a mode of directly loading floors in the conventional thinking is abandoned, but the battery pack is hung above a rear floor at the bottom of a suitcase and loaded on the side longitudinal beams, so that the strength is ensured, and meanwhile a stable fixation state is formed; and through reasonable partitioning, spaces above and below the rear floor are fully used, so that the function components such as the battery pack and the cooling system thereof, the fuel tank and the exhaust pipe muffler are reasonably arranged on a vehicle body.