Caliper for measuring local heat treatment size of fastener
A local heat treatment and fastener technology, which is applied in the field of fastener measurement tools, can solve the problems of low measurement accuracy and low efficiency, and achieve the effect of improving measurement efficiency and detection accuracy
Active Publication Date: 2015-06-17
AEROSPACE PRECISION PROD INC LTD
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Problems solved by technology
[0003] In view of this, the present invention aims to propose a measuring caliper for local heat treatment of fasteners to solve the problems of low accuracy and low efficiency in the measurement of local heat treatment of fasteners at present
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[0030] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0031] Such as figure 1 As shown, a caliper for measuring the local heat treatment size of a fastener includes a main ruler 1, a pair of inner measuring claws 2, an outer measuring claw 3, a digital display assembly 4, a fixed positioning member 7, a rotary positioning member 6, a limit screw A cap 8 and a spring 9, the lower end of the digital display assembly 4 is fixedly connected with a fixed frame 5, and the fixed frame 5 is fixedly connected with a fixed positioning member 7;
[0032] Such as figure 2 , 3 As shown, the rotary positioning member 6 includes a countersunk head cap 63 and a cylinder 64, and the axis lines of the two are collinear. The rotary positioning member 6 is similar to a countersunk head screw, and the end surface of the countersunk head cap 63 is connected to the outer The meas...
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The invention discloses a caliper for measuring the local heat treatment size of a fastener. The caliper comprises a main ruler, a pair of inner measuring jaws, an outer measuring jaw and a digital display assembly, and is characterized in that the lower end of the digital display assembly is fixedly connected with a fixed rack; the fixed rack is fixedly connected with a fixed positioning piece; a through hole of which the axis is parallel to the main ruler is formed in the fixed positioning piece; a rotary positioning piece is supported by the fixed positioning piece by virtue of the through hole, so that the rotary positioning piece can rotate around the axis; the rotary positioning piece comprises a countersunk head cap and a column body; the axes of the countersunk head cap and the column body are collinear; the end surface of the countersunk head cap is parallel to the outer measuring jaw; and a connecting piece facing the outer measuring jaw is arranged in the center of the countersunk head cap and is used for fixing the fastener. The caliper disclosed by the invention can be used for measuring by a general inspector, so that the detection precision of the local heat treatment size of the fastener is greatly improved in the production process, and the measurement efficiency is obviously improved.
Description
technical field [0001] The invention belongs to the technical field of fastener measuring tools, and in particular relates to a measuring caliper for local heat treatment of fasteners. Background technique [0002] Aerospace fasteners have very strict requirements on their performance. Some fasteners require that their strength be reduced after heat treatment in specific parts, so that local deformation occurs during the installation process to achieve the purpose of locking and fastening. These areas requiring specific deformation often require localized heat treatment. Its installation and use performance have strict requirements on the uniformity and consistency of heat treatment size, so the measurement and control of local heat treatment size of fasteners is particularly important. After partial heat treatment, there will be more obvious heat treatment traces on the surface of fasteners. At present, ordinary vernier calipers are mainly used for measurement. Under the c...
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Inventor 刘如刚王川程艳红桂林景梁新福郭双双徐飞王洪玮
Owner AEROSPACE PRECISION PROD INC LTD