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Mixed biasing type articulated arm measurement machine

An articulated arm and measuring machine technology, applied in the field of measuring machines, can solve the problems of increasing the moment of inertia of each articulated arm, reducing the rotation angle of the articulated arm, reducing the flexibility of operation, etc. light weight effect

Active Publication Date: 2015-12-16
CHINA PRECISION ENG INST FOR AIRCRAFT IND AVIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, there will also be many problems: when there is a bias, the center of gravity of each articulated arm will inevitably deviate from the axis of symmetry of the body, causing each arm to be biased, increasing the moment of inertia of each articulated arm, and making The factors that cause errors increase, and may even form new unmeasurable areas
However, the non-offset type arrangement will significantly increase the weight of the machine body, reduce the flexibility of operation, reduce the rotation angle of each articulated arm, and greatly affect the aesthetics of the whole machine
[0006] Although the offset articulated arm measuring machines currently on the market can meet some low-precision measurement requirements, there are still many demands for high-precision articulated arm measuring machines in this measurement field, which require high measurement accuracy and long service life. , low-cost articulated arm measuring machine with light weight, flexible operation and large rotation angle

Method used

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  • Mixed biasing type articulated arm measurement machine
  • Mixed biasing type articulated arm measurement machine
  • Mixed biasing type articulated arm measurement machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The hybrid offset articulated arm measuring machine consists of a first long-axis part 1, a first short-axis part 2, a second long-axis part 3, a second short-axis part 4, a third long-axis part 5, and a third short-axis part 6 , Measuring head connecting arm 7 are jointly composed.

[0072] The first long-axis component, the screw 18 fixes the first long-axis dense ball shaft system 19 on the first long-axis housing 12, the code disc seat 17, the code disc 30, the code disc pressure ring washer 33 and the code disc pressure ring 29 They are sequentially installed on the long axis I31 through hole-shaft fit, and the screws 16 are rigidly connected to the first long-axis dense ball shafting 19 . The reading head bracket 13 is screwed to the first long axis housing 12 , and the screw 15 rigidly connects the reading head 14 to the reading head bracket 13 . The cover plate 11 is rigidly fixed on the first long-axis housing 12 by screws 10, and the seal ring 20 is installed...

Embodiment 2

[0085] The offset in the first short axis part 2, the second short axis part 4 and the third short axis part 6 is removed, and the first long axis part 1, the second long axis part 3, the reading head slip ring assembly 113, The third long-axis part 5 and the probe connecting arm 7 undergo corresponding shape changes, becoming the first long-axis part 174, the first short-axis part 173, the second long-axis part 172, the second short-axis part 171, and the reading head The slip ring assembly 170 , the third major axis component 169 , the third short axis component 168 and the probe connection arm 167 . Both the second long arm 88 and the third long arm 114 are transformed from a cylindrical thin-walled pipe into two completely symmetrical oval cylindrical thin-walled pipes arranged symmetrically along the YZ plane and symmetrically designed along the ZX plane. That is, a non-biased articulated arm measuring machine (such as Figure 35 shown).

[0086] The non-offset articula...

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Abstract

The invention, which belongs to the field of the measurement machine of numerical control precision measurement equipment, especially relates to an articulated arm type measurement machine with an articulated arm structure. The measurement machine arranged symmetrically along a ZX plane comprises five steering knuckles capable of moving freely and independently and seven connecting arm segments. The five steering knuckles are in a dual-point support mode and support points of all knuckles except the knuckle 4 are arranged symmetrically along the ZX plane; and the knuckles 1 and 4 are infinite rotation knuckles. The measurement machine has comprehensive advantages of flexible operation, high structural rigidity, and light weight and the like.

Description

technical field [0001] The invention belongs to a measuring machine in numerical control precision measuring equipment, in particular to an articulated arm type measuring machine with an articulated arm structure. Background technique [0002] The articulated arm coordinate measuring machine is a non-orthogonal system coordinate measuring machine. It imitates the joint structure of the human body, replaces the length reference with an angle reference, connects several rods and a measuring head in series through a rotating joint, one end is fixed, and the other end (the measuring head) can move freely in space, forming a spherical measurement space. [0003] The articulated arm measuring machine has: 1) large measuring range; 2) small size, light weight, portable, suitable for on-site use; 3) flexible movement, easy to operate, etc., but also has low accuracy (generally around tens of microns) lack of. [0004] At present, the main rotary joints of various types of articula...

Claims

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Application Information

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IPC IPC(8): G01B21/04
Inventor 郭霞范弥纶张洋赵世迁王磊杜海涛
Owner CHINA PRECISION ENG INST FOR AIRCRAFT IND AVIC
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