Rebound apparatus calibrating device and using method thereof
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A technology for verification devices and rebound hammers, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., and can solve the problems that the verification of rebound hammers is not universal
Active Publication Date: 2012-12-12
舟山市博远科技开发有限公司
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In addition, the length of the top end of the spring hammer protruding from the spring seat is not the same, and because the front end of the rebound hammer is against the steel anvil on the hammer verification device, and the steel anvil is on the fixed frame, so The travel of the movable frame relative to the fixed frame also changes (translation), resulting in different types of rebound hammers having different pointer strokes, flange strokes and relative positions between the movable frame and the base on the verification device
[0005] In short, the flange guide rail form of the existing rebound hammer verification device requires different rebound hammer verification devices to be configured for different types of rebound hammers, and the position and size of the pointer cover plate and the flange guide rail in the existing verification device The position size is also not universal for the verification of different types of rebound hammers
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example 1
[0019] Example 1: This example is a hammer verification device compatible with the hammer verification of L20 hammer I, L75 hammer II and M225 hammer III. Its structure is as figure 1 , 2-1 , 2-2, 2-3, and 3.
[0020] The differences of the main components of the three types of rebound hammers:
[0021] The length of the extension spring seat from the top of the ejection rod: M225 and L75 are the same, and L20 is 20mm longer than M225 and L75 (there is a 20mm extension at the front end);
[0022] The extension spring seat has the same length;
[0023] Working length (free length) of extension spring: both are 61.5mm, that is, when the extension spring is in a free state, the length from the front end of the spring hammer to the fixed end of the extension spring seat is the same;
[0024] Tensile length of tension spring: both are 75mm;
[0025] Flange thickness: the same;
[0026] The diameter of the step of the pointer of the bounce hammer is the same;
[0027] The pos...
example 2
[0041] Example 2: This example is a hammer verification device compatible with the verification of two types of hammers, such as the M225 hammer and the H550 hammer.
[0042] The difference between the main components of the two types of rebound hammers:
[0043] The length of the top of the ejection rod protruding from the spring seat: H550 type is 1mm longer than M225 type;
[0044] The extension spring seat has the same length;
[0045] Extension spring working length (free length): M225 type is 61.5mm, H550 type is 86mm;
[0046] Tensile length of tension spring: 75mm for M225 type and 100mm for H550 type;
[0047] Flange thickness: the same;
[0048] The diameter of the step of the pointer of the bounce hammer is the same;
[0049] The position of the pointer step plane from the front face of the hammer: the H550 type is 8mm behind the M225 type;
[0050] The total length of the bullet hammer (front and rear end faces): H550 type is 7.5mm longer than M225 type;
[0...
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Abstract
The invention provides a rebound apparatus calibrating device. The rebound apparatus calibrating device eliminates an included angle formed by a plane where a flange guide rail (8) and a horizontal plane, simultaneously enlarges strokes of the flange guide rail, a moving frame guide rail (5) and a pointer guide rail (11) and a relative position variation range, and correspondingly enlarges measuring ranges of a force sensor (13) and a displacement sensor to meet calibrating requirements of multiple models of rebound apparatuses. For covering the shortage that the included angle formed by the flange guide rail and the horizontal plane enables a pointer to be driven by a pointer step of a rebounding hammer in the spring pulling and rebounding process, the invention provides a using method that a pointer cover plate is first upturned and then is turned downward when the rebounding hammer moves to an appropriate position in the spring pulling and rebounding process. Compared with the prior art, the rebound apparatus calibrating device is suitable for detection of the multiple models of rebound apparatuses, accordingly saves the cost of users purchasing devices, further eliminates tension spring tension-measuring errors caused by non-horizontal flange guide rail plane and improves measuring accuracy degree of relevant projects of the rebound apparatuses.
Description
technical field [0001] The invention relates to a rebound meter verification device and a method for using the same, belonging to the technical field of testing the strength characteristics of solid materials by mechanical stress in physical instruments. Background technique [0002] Rebound hammer is an instrument for measuring the surface hardness of objects. It has many specifications. There are as many as six main models such as H980, H550, H450, M225, L75, and L20, which are only used in the construction field. The hammer test device is a special test device for the measurement and verification of the hammer, which is used to measure the "working length of the rebound spring", "stretch length of the spring", "stiffness of the spring", and "stretch spring". Hammer take-off position" and many other metrological verification items. The current hammer verification device has a force sensor and a displacement sensor to simultaneously measure the stretched length and spring ...
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