Wave crest shearing and rolling method for corrugated plates of heat exchange plate frame
A heat exchange plate and corrugated plate technology, which is applied in the processing field of air preheater heat exchange fins, can solve problems such as low measurement accuracy or sensitivity, waste, and corrugated plate waste, so as to reduce production costs, eliminate waste, Precise and easy positioning
Active Publication Date: 2015-04-01
SHANGHAI XZS HEAVY MACHINERY SYST INTEGRATION
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Problems solved by technology
[0007] This kind of corrugated plate has an obvious defect in the wave-shear rolling process: in order to achieve the goal of consistent initial waveforms for all odd-numbered sheets / even-numbered sheets, each piece of corrugated plate must be trimmed off a section of residual waste during positioning and shearing.
According to calculations, about 15% of corrugated boards will be wasted in this way of finding the starting point. In automatic production, if the measurement accuracy or sensitivity of the detection sensor is low and the waveform is missed, the resulting more waste
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[0053] The present invention will be further described below in conjunction with accompanying drawing.
[0054] A corrugated plate-to-wave peak shear rolling method for a heat exchange plate basket,
[0055] Assume that the heat exchange plate and basket plate are located in the rectangular coordinates formed by the three orthogonal axes of x, y, and z;
[0056] The heat exchange plate basket is formed by parallel stacking of multi-layer heat exchange fins in the basket along the z direction;
[0057] The shape of the heat exchange plate basket is a trapezoid, the width of the trapezoid is y, the height of the trapezoid is z, and the heat exchange fins are located on the xy plane;
[0058] The width y of the trapezoid is a fixed value, and the trapezoidal surface is located on the xy plane, that is, the equal width of all stacked heat exchange fins is y. A group of more than one group of concave-convex corrugations along the z-axis that changes periodically in the x directio...
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The invention relates to a machining method for heat exchange plates of an air preheater. A wave crest shearing and rolling method for corrugated plates of a heat exchange plate frame comprises the following steps of: calculating the developed lengths of the heat exchange plates before rolling-forming; sequentially calculating the length of each heat exchange plate according to the characteristic that the appearance of the heat exchange plate frame is shaped like a trapezoid, and shearing flat heat exchange plates; and rolling-forming odd or even metal flat plates according to specified initial waveforms. Scrap edges are not required to be trimmed, and the production cost is greatly lowered.
Description
technical field [0001] The invention relates to a processing method for heat exchanging fins of an air preheater, in particular to a method for shearing and rolling heat exchanging fin corrugated plates with odd and even numbers of corrugated peaks and different lengths. Background technique [0002] The air preheater is a device that absorbs the heat of flue gas discharged from the boiler through its internal heat exchange surface and preheats the combustion air before entering the boiler to a certain temperature, which can improve the combustion efficiency of the boiler and reduce coal consumption. At present, the rotary preheater is more commonly used. [0003] The heat exchange surface of the rotary preheater is composed of multiple heat exchange plate baskets. The shape of a single heat exchange plate basket is a trapezoid with a fixed width and a length that gradually increases from bottom to top, or a fixed width with a length. Other three-dimensional shapes that cha...
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IPC IPC(8): B23P23/02B21D13/04
Inventor 李剑锋蔡丽娟俞邦定程卫锋
Owner SHANGHAI XZS HEAVY MACHINERY SYST INTEGRATION