Hidaka Seiki Kabushiki Kaisha

Kensaku Honma

Masahide Sakaguchi

Yoshihiro Baba

Toshiki Miyazawa

In forming a heat exchanger, a tube of the heat exchanger is expanded by a bullet, which is attached to a mandrel. The tube is projected from both end faces of a piled body formed by piling a plurality of fins. Each fin has a tube hole through which the tube passes. The fins and the tube are integrated by expansion of the tube. A first projected section of the tube, which is projected from one end face of the piled body and which has been expanded by the bullet, is held at a prescribed position. The bullet is pressed toward a second projected section, which is projected from the other end face of the piled body. As the bullet moves toward the second projected section, it expands the tube. The second projected section of the tube is allowed to contract during the tube expansion. An object of the present invention is to prevent adhesion of adjacent fins and irregularities in fin clearances between adjacent fins.

Tube expander

The present invention provides an assembling apparatus for a heat exchanger, which is capable of certainly coinciding ends of pipes with pipe holes of fins so as to easily insert the pipes into the pipe holes. In the apparatus, a send-in section sets the stack pin holders at predetermined positions and is capable of keeping the stack pins extending upward. A plurality of supporting sections vertically hold the pipes whose U-bent sections are located at the uppermost position. A pipe inserting section has a plurality of holders, which are capable of receiving the pipes from the supporting sections to hold, and a plurality of inserting dies for pushing the pipes downward. A guide section is provided above the send-in section and has a plurality of guide holes into which the pipes pushed by the inserting dies are inserted. The guide holes are capable of limiting outer width of the pipes by at least inner faces and introducing the pipes into the pipe holes of the fins.

Assembling apparatus for a heat exchanger

A feeding apparatus for a metal belting has a basic plate being capable of supporting the metal belting, which has a plurality of through-holes in a feeding direction. The basic plate has slit formed in the feeding direction and a plurality of traveling plates are provided beneath and in parallel to the basic plate. The traveling plates are movable in the feeding direction of the metal belting. A driving mechanism for moving the traveling plates in the feeding direction of the metal belting is provided as well as a plurality of feeding pins which are vertically pierced through the traveling plates. Springs bias the feeding pins downward. A plate cam is provided beneath the traveling plates. The plate cam is capable of applying force to upwardly move the feeding pins, against the springs, in a prescribed range.

Feeding apparatus for metal belting and manufacturing apparatus for fins

The present invention relates to a tube expander having a reciprocating member for selectively reciprocating a plurality of mandrels for expanding tubes. Each mandrel includes a bullet, having a diameter which is larger than the inner diameter of the tubes, at the one end thereof. The tube expander of the present invention comprises an engage section formed at a head section of the mandrel, the diameter of the engage section is larger than the shaft section of the mandrel. A fixture is provided with the reciprocating member and having a through-hole through which the shaft section of the mandrel is inserted. A stopper is provided on the rear face of the fixture and being independently moved with respect to the head section of the mandrel by a drive means. The stopper prevents the mandrel from moving in the axial direction thereof with respect to the fixture during the movement of the stopper.

Growing community of inventors

Tokyo, Japan

Kensaku Honma