An air cylinder is joined to a guide pipe via a joining member. A stopper member is arranged in a position where the guide pipe and a feed pipe for feeding a projection nut are coupled to form a temporary locking chamber of the nut. A sliding rod is integrated with a smaller diameter guide rod and enters a screw hole. Relative positions of the temporary locking chamber and a feed rod are set such that the screw hole of the nut stopped in the temporary locking chamber is coaxial with the feed rod. A gap is formed between the sliding rod and the guide pipe while a support hole is formed in an end part of the guide pipe, and when the feed rod is retracted, the sliding rod is supported in a state where a slight sliding gap is left in the support hole.

A method for producing a secondary battery according to the present invention comprises a step wherein a negative electrode collector, which has a projection having a height of from 0.36 mm to 0.45 mm on at least one of a first member and a second member, said members constituting the negative electrode collector, is resistance-welded with a core multilayer part in such a manner that the core multilayer part is sandwiched between the first member and the second member, while having the projection in contact with the core multilayer part.

A poppet valve, in particular a hollow poppet valve, includes: a valve stem; a valve body having along a longitudinal axis, a first end with a neck portion to which the valve stem is coaxially arranged and having along a longitudinal axis a second end with a first conical contact face portion, the valve body including a cavity with a first opening towards the first end and a second opening towards the second end; and a valve cap coaxially arranged to the valve body on the second end for closing the second opening, the valve cap having a second conical contact face portion to form together with the first conical contact face portion a valve head contact face.

To provide a clamping mechanism, and an apparatus and a method for manufacturing joined object, all of which allow, with a simple configuration, clamping of clamp objects having sizes different from each other, stably at their positions. A clamping mechanism 10 includes a plurality of clamp claws 11 configured to clamp an object S to be clamped; a plurality of support shafts 16 configured to pivotally support a corresponding clamp claw 11, wherein the corresponding clamp claw 11 pivots around the support shaft 16 for opening or closing movement; and a mover apparatus 12 configured to cause the clamp claw 11 to perform the opening or closing movement. A joined object manufacturing apparatus includes the clamping mechanism 10, a holder configured to hold an object to be joined, and a joining apparatus configured to join the object S clamped by the clamping mechanism 10 and the object to be joined that is held by the holder. A method for manufacturing a joined object includes causing the clamping mechanism 10 to clamp the object S by use of the joined object manufacturing apparatus, causing the holder to hold the object to be joined, and joining the both.

To provide a clamping mechanism, and an apparatus and a method for manufacturing joined object, all of which allow, with a simple configuration, clamping of clamp objects having sizes different from each other, stably at their positions. A clamping mechanism 10 includes a plurality of clamp claws 11 configured to clamp an object S to be clamped; a plurality of support shafts 16 configured to pivotally support a corresponding clamp claw 11, wherein the corresponding clamp claw 11 pivots around the support shaft 16 for opening or closing movement; and a mover apparatus 12 configured to cause the clamp claw 11 to perform the opening or closing movement. A joined object manufacturing apparatus includes the clamping mechanism 10, a holder configured to hold an object to be joined, and a joining apparatus configured to join the object S clamped by the clamping mechanism 10 and the object to be joined that is held by the holder. A method for manufacturing a joined object includes causing the clamping mechanism 10 to clamp the object S by use of the joined object manufacturing apparatus, causing the holder to hold the object to be joined, and joining the both.

An apparatus includes a housing, a pin, a mechanism and a sensor. The housing is configured to receive a weld head. The pin is configured to move linearly relative to said housing. The mechanism is configured to convert a position of said pin into a displacement. The sensor is configured to generate a value representative of said position of said pin based on said displacement.

A poppet valve, in particular a hollow poppet valve, includes: a valve stem; a valve body having along a longitudinal axis, a first end with a neck portion to which the valve stem is coaxially arranged and having along a longitudinal axis a second end with a first conical contact face portion, the valve body including a cavity with a first opening towards the first end and a second opening towards the second end; and a valve cap coaxially arranged to the valve body on the second end for closing the second opening, the valve cap having a second conical contact face portion to form together with the first conical contact face portion a valve head contact face.

An apparatus includes a housing, a pin, a mechanism and a sensor. The housing is configured to receive a weld head. The pin is configured to move linearly relative to said housing. The mechanism is configured to convert a position of said pin into a displacement. The sensor is configured to generate a value representative of said position of said pin based on said displacement.

The invention relates to a method for welding hard material bodies to teeth of a saw blade, in particular of a band saw blade or circular saw blade, wherein each tooth has a joining surface, and each hard material body has a joining surface. The joining surface of the hard material body can be welded to the joining surface of the tooth. The method has the following steps: bringing each tooth of the saw blade into a working region; guiding each hard material body towards the tooth located in the working region; advancing a welding device into the working region; welding the hard material body to the tooth surface of the tooth located in the working region; and withdrawing the welding device out of the working region. According to the invention, at least one welding introduction attachment which protrudes from the joining surface of the tooth is formed on each tooth or at least one welding introduction attachment which protrudes from the joining surface of the hard material body is formed on each hard material body. The welding introduction attachment is melted upon introducing a welding pulse.

The invention relates to a method for welding hard material bodies to teeth of a saw blade, in particular of a band saw blade or circular saw blade, wherein each tooth has a joining surface, and each hard material body has a joining surface. The joining surface of the hard material body can be welded to the joining surface of the tooth. The method has the following steps: bringing each tooth of the saw blade into a working region; guiding each hard material body towards the tooth located in the working region; advancing a welding device into the working region; welding the hard material body to the tooth surface of the tooth located in the working region; and withdrawing the welding device out of the working region. According to the invention, at least one welding introduction attachment which protrudes from the joining surface of the tooth is formed on each tooth or at least one welding introduction attachment which protrudes from the joining surface of the hard material body is formed on each hard material body. The welding introduction attachment is melted upon introducing a welding pulse.