摘要:
The transverse member (29) of a reflow soldering heater bar (23) is slotted at intervals to reduce thermal expansion. The slots (63), which typically extend orthogonally through the transverse member (29) and the connecting legs (61) of the heater bar (23), may extend diagonally therethrough to prevent missed welds.
摘要:
A method of reflow soldering a row of electrical component leads to a printed circuit board using a heater bar is disclosed. The method involves the steps of, firstly, moving the heater bar to a position above the location of the leads and allowing the heater bar to rock within its plane to float into proper position, and secondly, then clamping the heater bar, supplying voltage to heat the heating element portion of the heater bar, and applying soldering pressure. Corresponding apparatus is disclosed, in which the heater bar is adapted to rock within its plane. The heater bar has a support arm projecting upwardly from the heating element portion. A carriage includes a channel which accommodates the support arm and is somewhat larger in the horizontal dimension in the plane of the heater bar, thereby allowing the heater bar to rock. A clamping bar is movable into the channel for clamping the heater bar via the support arm. Voltage is supplied to the heating element though the contacts between positive and negative contact portions of the clamping bar and support arm respectively.
摘要:
A heating apparatus for heating components to be connected to each other which are supported on a thin substrate comprises a U-shaped heating tool which is brought down on the components and a U-shaped support which engages a lower surface of the substrate. Both the tool and the support are heated to reduce a temperature gradient or thermal losses through the substrate. The support also absorbs the forces of the tool when the tool is pressed against the parts to be connected to each other.
摘要:
An apparatus for connecting one part to another by heating the parts comprises a heated tool with a heating bar, having a heated surface for being brought into contact with the one part and for being moved toward the other part, and a stop mechanism in the form of a mechanical stop bar, or sensing arrangement for stopping the movement of the heated tool toward the other part when a selected spacing between the heated tool and the other part is reached.
摘要:
The present disclosure relates to a method for producing a final metal part for a nacelle of a turbojet. The method includes brazing at least two parts, one being an inner part having an inner surface and the other being an outer part having an outer surface. The method further includes a step of heating the outer surface of the outer part using an external heating means, and a step of heating the inner surface of the inner part using an internal heating means.
摘要:
A method for connecting or terminating wires to a printed circuit is disclosed. The method includes applying layers, such as a first layer and a second layer, to the printed circuit. The first layer is applied over several active components on the printed circuit, and provides a sealant against ingress of contaminants in the active components. The second layer is a rigid layer applied over the first layer. When the printed circuit is placed in a fixture, a metallic element, such as a thermode or hot bar, presses against the wires to hold the wires against several terminals on the printed circuit. The metallic element is heated to melt solder between the wires and the terminals. The second layer is configured to resist compressive forces from the metallic element and the fixture, such that the printed circuit and the active components are not damaged during the connection process.
摘要:
A solar cell module comprises a solar cell die that is soldered to a substrate. The substrate comprises one or more power contacts. A power conductor is soldered to a power contact, thereby electrically coupling the power conductor to the solar cell die. A pre-heat module heats a first side of the substrate at a first area to a first temperature for a first duration. Then, a solder heat source solders a power conductor to a power contact at a second area of the substrate at a second temperature for a second duration. The resulting solder connection at the power conductor is less prone to cold-solder defects. The temperature of the pre-heat module is controlled to promote curing of an RTV sealant used in the manufacture of the solar cell module. The temperature of the solder heat source is controlled to avoid burning and degrading of the RTV sealant.
摘要:
According to one embodiment, a heating apparatus includes, a heating chamber, a fan provided in the heating chamber, the fan blowing atmosphere upward, a heater provided in the heating chamber and above the fan, the heater heating the atmosphere blown by the fan, a plurality of first straightening vanes arranged in a substantially horizontal direction so as to be spaced apart from one another in the heating chamber and above the heater, a plurality of second straightening vanes arranged in a substantially horizontal direction so as to be spaced apart from one another in the heating chamber and above the first straightening vanes, each of the plurality of second straightening vanes overlapping both of its adjacent first straightening vanes, and a transfer unit which transfers a board, at least part of the transfer unit being provided in the heating chamber and located above the second straightening vanes.
摘要:
There is provided a bonding heater used to package a semiconductor chip on a multilayer substrate, which has adaptability to various chip sizes, with an excellent maintenance characteristics, with undesirable displacement of the chip at the time of mounting a semiconductor chip being made as small as possible and also with a temperature rise time to a desired temperature being shortened. This bonding heater is constituted by a ceramic tool for pressing an object to be heated, a ceramic heater for heating the tool, a heat insulating member for transferring heat generated by the ceramic heater mainly to the tool side and a holder for integrating these members and connecting these members to another member, and the tool, ceramic heater, heat insulating member and holder are detachably bonded.