Device and method for inspecting connecting rod
A technology for inspection devices and inspection methods, applied to measuring devices, optical devices, instruments, etc., can solve problems such as inability to measure, uncertain changes, large errors in measurement results, etc.
Active Publication Date: 2007-08-08
HONDA MOTOR CO LTD
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Problems solved by technology
In addition, when the connecting rod is divided into a rod part and a cover part, it may also cause elongation (expansion) on the rod part and the cover part due to the residual stress generated after the split.
[0009] Therefore, if the Japanese Patent Application Publication No. 11-156577, Japanese Patent Application Publication No. 2001-183113 and Japanese Patent Application Publication No. 2003-315020, in which the plane is set as the surface to be measured, are applicable to the above-mentioned subdivision In the step difference part formed on the recombination part, it cannot be measured because the change of the measured surface is not constant, or the measurement result contains a large error
Method used
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[0022] FIG. 1A is a perspective view of a connecting rod 30 as an object to be inspected to which the present invention is applied. The connecting rod 30 is formed by recombining the split cover part 32 and the rod part 34 by bolts 43a and 43b. FIG. 1B is a perspective view showing a state where the large end portion of the connecting rod 30 is divided into a cover portion 32 and a rod portion 34 .
[0023] The connecting rod 30 has a large end portion 38 in which the cover portion 32 and the rod portion 34 are integrally formed through a substantially circular coupling hole 36 , and a small end portion 40 disposed on the opposite side of the large end portion 38 . The connecting rod 30 is integrally formed by, for example, casting or forging, and then divided into a cover portion 32 and a rod portion 34 using a cracking processing device (not shown).
[0024] In addition, on both sides of the large end portion 38 of the connecting rod 30 , bolt holes 42 a and 42 b are respect...
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The invention provides connecting rod inspecting device and the testing method. A connecting rod inspecting device is provided with a work table (54) for placing a connecting rod (30) in a status where the connecting rod is positioned at a prescribed position; a slide unit (58) for reciprocating the work table (54) along the horizontal direction; and first to fourth distance sensors (60a-60d) for measuring a step quantity (D) of a step part (98) by irradiating measuring planes (94a, 94b) composed of curved surfaces with laser beams and measuring distances between the sensors and the planes irradiated with the beams. Such that, conforming / nonconforming judgment is made by the measured step quantity (D) and a range of allowable quantities previously set.
Description
technical field [0001] The present invention relates to an inspection device and an inspection method of a connecting rod constituting, for example, a vehicle engine part, and more specifically, to making the above-mentioned cover and rod after the large end portion of the connecting rod is divided into a cover and a rod. An inspection device and an inspection method for a connecting rod for inspecting the stepped portion of the split joint surface for partial recombination. Background technique [0002] Conventionally, for example, a connecting rod connecting a piston pin and a crank pin is widely used in a vehicle engine. This connecting rod has a large end connected to the above-mentioned crank pin and a small end connected to the above-mentioned piston pin. And integrally formed, then make the above-mentioned large end portion be divided into a cover portion and a rod portion. [0003] The divided cover portion and stem portion are rejoined via bolts and subjected to a...
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Inventor 小口嗣夫奥村秀树
Owner HONDA MOTOR CO LTD