Tensioning core rod
A mandrel and tightening technology, applied in the field of mandrel tightening, can solve the problem that the center of the hole cannot be determined.
Active Publication Date: 2013-03-13
德庆县智联机械科技有限公司
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Problems solved by technology
[0002] Some parts with holes need to detect the actual situation of the hole and the center of the hole. Generally, the tension mandrel is used to extend into the hole, and the state of the steel ball in the tension mandrel is used to judge. One end of the existing tension mandrel The slider is connected by a spring, and then a slider and a fixed block are connected. A circle of steel balls are respectively arranged between the sliders and between the slider and the fixed block. When the spring is squeezed, the steel balls between the sliders move outward to drive the slider. The steel ball between the fixed block and the fixed block moves outward, and the change state is consistent. When the hole diameters of the inner wall of the workpiece to be inspected are inconsistent, such as a tapered hole, the existing tension mandrel cannot detect its actual situation, and the center of the hole is also unconfirmed
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[0008] See figure 1 As shown, it includes a main shaft 1, and the main shaft 1 is provided with a lower spring 2, a lower block 3, a fixed block 4, an upper slider 5, an upper spring 6, an upper slider 5, a fixed block 4, and a lower block 3. The edges are provided with chamfers, and a cage 11 is respectively arranged in the chamfered groove between the lower block 3 and the fixed block 4, and in the chamfered groove between the fixed block 4 and the upper slider 5, and the inside of the cage 11 A ring of steel balls 7 is provided, the lower spring 2 is connected to the lower push block 8, the upper spring 6 is connected to the upper push block 9, the lower push block 8 is provided with a handle 10, the chamfered groove between the lower block 3 and the fixed block 4, The included angle of the chamfered groove between the fixed block 4 and the upper slider 5 is 120 degrees, and its angle is set to 120 degrees as the optimal angle, so that the resistance of the movement of the ...
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The invention relates to the field of product detection, in particular to a tensioning core rod. The tensioning core rod can detect actual situations of various through holes and centers of the holes, comprises a spindle and is characterized in that a lower spring, a lower slide block, a fixing block, an upper slide block, an upper spring, an upper slide block and a fixing block are sequentially arranged on the spindle, the edge of the lower sliding block is provided with a chamfer, a circle of retaining frame is respectively arranged in a chamfer groove between the lower slide block and the fixing block and a chamfer groove between the fixing block and the upper block, and a circle of steel balls are respectively in the retaining frames.
Description
technical field [0001] The invention relates to the field of product detection, in particular to a tensioning mandrel. Background technique [0002] Some parts with holes need to detect the actual situation of the hole and the center of the hole. Generally, the tension mandrel is used to extend into the hole, and the state of the steel ball in the tension mandrel is used to judge. One end of the existing tension mandrel The slider is connected by a spring, and then a slider and a fixed block are connected. A circle of steel balls are respectively arranged between the sliders and between the slider and the fixed block. When the spring is squeezed, the steel balls between the sliders move outward to drive the slider. The steel ball between the fixed block and the fixed block moves outward, and the change state is consistent. When the hole diameters of the inner wall of the workpiece to be inspected are inconsistent, such as a tapered hole, the existing tension mandrel cannot d...
Claims
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IPC IPC(8): G01B5/00
Inventor 蒋新芬
Owner 德庆县智联机械科技有限公司