Tool for detecting position of positioning pin of end lug plate of tacking fixture of climbing rack

Abstract

The invention discloses a tool for detecting the position of a positioning pin of an end lug plate of a tacking fixture of a climbing rack, and the tool comprises a rectangular frame structure which comprises a longitudinal rod and a lateral rod. Four corners of the frame structure are provided with verification holes which are used for verifying the position of the positioning pin. The frame structure is divided into an upper segment and a lower segment, wherein the joints of the two segments are connected through a connection plate. The tool employs the frame structure which is formed by butt-joint surfaces of plane flanges, and the verification holes are formed through numerical control machining central drill pins. In use, the tool is disassembled and is respectively disposed at verification positions in a sleeving manner, thereby reducing the disassembly tie of a detected part when the whole too is employed, and guaranteeing the verification precision.

Description

technical field [0001] The invention relates to a hoisting machine, in particular to a position checking tool for the positioning pin position of the lug plate at the end of a climbing frame assembly point tooling. Background technique [0002] Climbing frame: the main structural part of the tower crane, used for the jacking of the tower crane. The climbing frame assembly point tooling is a welding tooling manufactured by the climbing frame, and the position accuracy of the four lug plate positioning pins directly affects whether the climbing frame and the lower support are assembled smoothly. [0003] The dimensions between the four positioning pins at the end of the climbing frame assembly tooling must be measured at least 6 dimensions to determine their relative positions. Due to the following reasons, ordinary measurement methods cannot achieve or fail to achieve measurement accuracy: [0004] 1. The positioning pin is circular, and there is no positioning device at the...

AI Technical Summary

Problems solved by technology

[0003] The dimensions between the four positioning pins at the end of the climbing frame assembly tooling must be measured at least 6 dimensions to determine their relative positions. Due to the following reasons, ordinary measurement methods cannot achieve or fail to achieve measurement accuracy:

[0004] 1. The positioning pin is circular, and there is no positioning device at the bottom of the positioning pin. The verticality of the positioning pin affects the measurement accuracy. The position accuracy of these four position pins is relative to the position accuracy of the center line. The relative accuracy cannot be achieved by ordinary measurement methods. Accuracy within 1mm

[0005] 2. When measuring the diagonal size, such as figure 1 As shown, there are 4 main chords between the four positioning pins of the tested tooling. Due to the obstruction of the workpiece and the structural size of the tested part, the measuring tool cannot pass through

[0006] 3. The structure size of the tested part is large, and the seal between the ground and the ground is broken. When using ordinary inspection tools, the "basic section" in the tooling needs to be removed.

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