It is possible to improve workpiece machining efficiency by efficiently receiving and delivering a workpiece from/to each workpiece holder and shortening a time required for workpiece conveyance. A workpiece conveyance system is a workpiece conveyance system that receives and delivers workpieces W to be machined to n spindles (workpiece holders, where n is an integer satisfying n≥2) that hold and rotate the workpieces W, and includes a main loader including n+m main loader chucks (where m is an integer satisfying m≥1) that receive and deliver workpieces from/to the n spindles or n relay loaders disposed corresponding to the n respective spindles to receive and deliver the workpieces W from/to the main shafts.

Provided is a molding packaging material which is capable of ensuring good slipperiness to secure good formability when molding the molding packaging material and is less likely to cause white powder on a surface of the packaging material. The molding packaging material includes a substrate layer 2 as an outer layer, a heat fusible resin layer 3 as an inner layer, and a metal foil layer 4 arranged between the two layers. The heat fusible resin layer 3 is composed of a single layer or a multi-layer. The innermost layer of the heat fusible resin layer 3 is made of a resin composition containing a heat fusible resin, an anti-blocking agent, a slip agent, and a fluoropolymer-based lubricant.

The chemical treatment steel sheet includes a steel sheet, a mat finished Sn plating layer that is provided as an upper layer of the steel sheet and is formed of a -Sn, and a chemical treatment layer that is provided as an upper layer of the Sn plating layer. The Sn plating layer contains the -Sn of 0.10 g/m.sup.2 to 20.0 g/m.sup.2 in terms of an amount of metal Sn. A crystal orientation index of a (100) plane group of the Sn plating layer is higher than crystal orientation indexes of other crystal orientation planes. The chemical treatment layer includes a Zr compound containing Zr of 0.50 mg/m.sup.2 to 50.0 mg/m.sup.2 in terms of an amount of metal Zr, and a phosphate compound.

A strip intended for the manufacture of brazed heat exchangers, having a core made of an aluminium alloy with the composition (weight %): Si: 0.10-0.30%, preferably 0.15-0.25% Fe<0.20% Cu: 0.75-1.05%, preferably 0.75-1.02%, more preferably 0.75-1.0% Mn: 1.2-1.7%, preferably 1.2-1.55%, more preferably 1.25-1.4% Mg<0.03% preferably <0.025%, more preferably <0.015% Zn<0.1% Ti<0.15% other elements <0.05% each and <0.15% in total, remainder aluminium.

The present invention discloses an efficient brake disc processing device, which relates to the technical field of brake disc processing, comprising a lathe bed, an upright vertical lathe and a first power tool holder installed on a top end of the lathe bed, and an inverted vertical lathe and a second power tool holder installed on a rear side of the top end of the lathe bed, wherein the upright vertical lathe is cooperated with the second power tool holder to process an upper brake surface of a brake disc, and the inverted vertical lathe is cooperated with the first power tool holder to process a lower brake surface of the brake disc.

A control part of a control device includes a learning controller and a learning determination part. The learning controller performs learning control in which a correction amount of a resultant command is obtained, based on an oscillation phase obtained from an oscillation command and the resultant command, and the correction amount is added to the resultant command. The learning determination part determines whether or not the oscillation amplitude of the oscillation command is smaller than a predetermined threshold, and when the oscillation amplitude is smaller than the predetermined threshold value, the learning determination part both sets the oscillation command generated by an oscillation command generation part to zero and turns off the learning control or only turns off the learning control.

A galvanized steel sheet for hot forming, the galvanized steel sheet including a galvanized film provided on a surface of a steel sheet, wherein the steel sheet has a chemical composition consisting of, in mass %, C: 0.02% to 0.58%, Mn: 0.5% to 3.0%, sol. Al: 0.005% to 1.0%, a predetermined element(s) as necessary; Si: less than or equal to 2.0%, P: less than or equal to 0.03%, S: less than or equal to 0.004%, N: less than or equal to 0.01%, and the balance: Fe and impurities, wherein a content of Mn in a portion from an interface of the steel sheet and the galvanized film to a depth of 5 m is more than or equal to 0.3 mass %, wherein the galvanized film has a plating coverage of 40 g/m.sup.2 to 110 g/m.sup.2, an Al content of more than or equal to 150 mg/m.sup.2 within the galvanized film, and an Al concentration of less than or equal to 0.5 mass %, and wherein the galvanized steel sheet is used for an application in which the galvanized steel sheet is heated to 700 C. or above and is then subjected to hot forming.