A method of manufacturing a panel using an initial die and a series of secondary dies includes sequentially defining multi-dimensional models for the series of secondary dies. The method includes simulating a geometry of an n.sup.th pre-panel, defining a multi-dimensional model of the n.sup.th secondary die based on the simulated geometry of the n.sup.th pre-panel, simulating operation of the n.sup.th secondary die on the n.sup.th pre-panel to determine geometry of an (n+1).sup.th pre-panel, and determining a deviation between the simulated (n+1).sup.th pre-panel and a target pre-panel geometry. If the deviation is outside tolerance, the method includes iteratively: adjusting the multi-dimensional model of the n.sup.th secondary die, simulating operation thereof to determine an adjusted simulated geometry of the (n+1).sup.th pre-panel, and determining a deviation between the adjusted simulated geometry of the (n+1).sup.th pre-panel and the target (n+1).sup.th pre-panel, until the deviation is within the tolerance limit.

A method of manufacturing a panel using an initial die and a series of secondary dies includes sequentially defining multi-dimensional models for the series of secondary dies. The method includes simulating a geometry of an n.sup.th pre-panel, defining a multi-dimensional model of the n.sup.th secondary die based on the simulated geometry of the n.sup.th pre-panel, simulating operation of the n.sup.th secondary die on the n.sup.th pre-panel to determine geometry of an (n+1).sup.th pre-panel, and determining a deviation between the simulated (n+1).sup.th pre-panel and a target pre-panel geometry. If the deviation is outside tolerance, the method includes iteratively: adjusting the multi-dimensional model of the n.sup.th secondary die, simulating operation thereof to determine an adjusted simulated geometry of the (n+1).sup.th pre-panel, and determining a deviation between the adjusted simulated geometry of the (n+1).sup.th pre-panel and the target (n+1).sup.th pre-panel, until the deviation is within the tolerance limit.

The invention provides a design method for a connecting rod. The connecting rod includes a first end, a shank and a second end; and the shank is connected between the first end and the second end. The design method includes: determining a weight m.sub.1 of a standard steel connecting rod; determining a weight m.sub.2 of a nodular cast iron connecting rod having the same size with the standard steel connecting rod; and simulating to reinforce the shank with a reinforcement material having a preset weight m, and calculating a size of the reinforced shank; where m.sub.1>m.sub.2, and m<m.sub.1−m.sub.2. The present invention overcomes the technical problem that existing steel connecting rods have larger weights.

The invention provides a design method for a connecting rod. The connecting rod includes a first end, a shank and a second end; and the shank is connected between the first end and the second end. The design method includes: determining a weight m.sub.1 of a standard steel connecting rod; determining a weight m.sub.2 of a nodular cast iron connecting rod having the same size with the standard steel connecting rod; and simulating to reinforce the shank with a reinforcement material having a preset weight m, and calculating a size of the reinforced shank; where m.sub.1>m.sub.2, and m<m.sub.1m.sub.2. The present invention overcomes the technical problem that existing steel connecting rods have larger weights.

A method of making a blister sealing fixture which includes the selection of a card locating portion which has an annular wall which defines an annular recess closed by a removable bottom wall. A sealing insert portion having a cavity to receive a blister to be sealed is positioned on the bottom wall and is adapted to be moved to all positions within the recess. A sample or test card of the configuration of a production run to be handled by the sealing fixture is selected and to this card a sample or test blister is attached. The position of the blister on the card is determined by the user and has herein has at times been referred to as a desired position or location. This resulting positioning device is then placed over the recess with the test blister engaging the recess in the sealing insert.