This invention discloses a positioning and welding method for a ship stern thruster that relates to the technical field of ship manufacturing. A stern thruster is installed after adjusting and cutting hull stiffener panels according to the fitting condition of a prosthesis and a hull stiffener panel. The actions of manufacturing and installing the model, positioning the model structure by setting wire, adjusting the fitting condition of the model's stiffener panel and the hull stiffener panel can make it convenient to set wire and make it accurate to position the model. So the stern thruster is easy to install. The model can be repeatedly used, and the method is suitable for quantitative production.

This invention discloses a positioning and welding method for a ship stern thruster that relates to the technical field of ship manufacturing. A stern thruster is installed after adjusting and cutting hull stiffener panels according to the fitting condition of a prosthesis and a hull stiffener panel. The actions of manufacturing and installing the model, positioning the model structure by setting wire, adjusting the fitting condition of the model's stiffener panel and the hull stiffener panel can make it convenient to set wire and make it accurate to position the model. So the stern thruster is easy to install. The model can be repeatedly used, and the method is suitable for quantitative production.

A system and method for automatically joining a cut blank has a mandrel and clamps to conform the cut blank to the mandrel. The clamps include band clamps and pad clamps that pivot about axes that are obliquely angled with respect to the centerline of the mandrel. The clamp axes on one side of the centerline are a mirror image to the clamp axes on the other side. The cut blank has a line of symmetry and is clamped to the centerline of the mandrel with a locator bar. The clamps are then moved to a clamped position. In the clamped position, one edge of the cut blank meets another edge, and a robotic welder joins the edges.

A system and method for automatically joining a cut blank has a mandrel and clamps to conform the cut blank to the mandrel. The clamps include band clamps and pad clamps that pivot about axes that are obliquely angled with respect to the centerline of the mandrel. The clamp axes on one side of the centerline are a mirror image to the clamp axes on the other side. The cut blank has a line of symmetry and is clamped to the centerline of the mandrel with a locator bar. The clamps are then moved to a clamped position. In the clamped position, one edge of the cut blank meets another edge, and a robotic welder joins the edges.

In a membrane type heat insulation system for a cryogenic liquefied gas carrier cargo tank and a liquefied gas fuel container, a secondary heat insulation layer comprises a plurality of panels which are stacked in multiple layers while each pair of upper and lower panels is arranged to intersect each other, whereby heat loss which may occur in the gap between the panels can be minimized and deformation due to a temperature difference can be minimized.

In a membrane type heat insulation system for a cryogenic liquefied gas carrier cargo tank and a liquefied gas fuel container, a secondary heat insulation layer comprises a plurality of panels which are stacked in multiple layers while each pair of upper and lower panels is arranged to intersect each other, whereby heat loss which may occur in the gap between the panels can be minimized and deformation due to a temperature difference can be minimized.

Disclosed is a heat-insulation system for a liquefied natural gas cargo hold, which comprises a primary sealing wall, a secondary sealing wall, and a secondary heat-insulating layer, and is applied to a liquefied natural gas cargo hold. The heat-insulation system for a liquefied natural gas cargo hold comprises a collar stud installed on a line on the upper surface of the secondary heat-insulating layer where an anchor strip is installed.

A boat hull has one or more track systems integral with a main body of the boat hull, each track system having a longitudinally extending channel comprising: a longitudinally extending channel body; and a longitudinally extending channel opening in communication with the channel body, wherein the channel body is wider in cross-section than the channel opening, the channel body is adapted to receive a fastener which has a portion that is wider in cross section than the channel opening, thereby preventing the fastener from being withdrawn from the channel body through the channel opening, and wherein the fastener can be selectively secured to the track system at a selected longitudinal position. The track systems can be used for mounting boat hull structural parts and other parts and accessories.

A boat hull has one or more track systems integral with a main body of the boat hull, each track system having a longitudinally extending channel comprising: a longitudinally extending channel body; and a longitudinally extending channel opening in communication with the channel body, wherein the channel body is wider in cross-section than the channel opening, the channel body is adapted to receive a fastener which has a portion that is wider in cross section than the channel opening, thereby preventing the fastener from being withdrawn from the channel body through the channel opening, and wherein the fastener can be selectively secured to the track system at a selected longitudinal position. The track systems can be used for mounting boat hull structural parts and other parts and accessories.

An inflatable boat processing method, an inflatable boat and a processing device thereof, wherein the processing method comprising: cutting material into boat-side material pieces and a boat bottom material piece following an inflatable boat sample; connecting the adjacent edges of the boat-side material pieces in an overlapped mode, thereby obtaining a boat-side body; connecting the boat-side body with the boat bottom, wherein a first connecting end of the boat-side body is connected with the boat bottom material piece in an overlapped mode by means of pressing and ultrasonic bonding; sealing the boat-side body, wherein the edge of the first connecting end is connected with the edge of the second connecting end of the boat-side body in an overlapped mode; obtaining an inflatable boat. A heating-and-pressing device and an ultrasonic soldering device are adopted to perform hot-melting and pressing, thereby achieving the connection of two material pieces using ultrasonic bonding.