Machine tool spindle-cutter handle connection structure dynamics modeling method based on ultrasonic detection

A dynamic modeling and connection structure technology, applied in computer-aided design, special data processing applications, instruments, etc., can solve problems such as noise sensitivity, and achieve high accuracy and good versatility

Active Publication Date: 2019-04-19
NORTHWESTERN POLYTECHNICAL UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to avoid the deficiencies of the prior art, the present invention proposes a dynamic modeling method of the machine tool spindle-knife handle connection structure based on ultrasonic detection, which solves the problem that the existing ultrasonic contact stiffness detection method is sensitive to noise, and realizes the - Accurate construction of the dynamic Xu model of the tool handle connection structure

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  • Machine tool spindle-cutter handle connection structure dynamics modeling method based on ultrasonic detection
  • Machine tool spindle-cutter handle connection structure dynamics modeling method based on ultrasonic detection
  • Machine tool spindle-cutter handle connection structure dynamics modeling method based on ultrasonic detection

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Embodiment Construction

[0041] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0042] Tool holders with a taper of 7:24 are widely used in the spindle system of machine tools. The contact stiffness detection method of the present invention will be further described in detail in conjunction with the accompanying drawings by taking the 7:24 spindle-tool holder joint surface as an example.

[0043] Step 1. In a typical spindle-tool holder connection structure, the outer surface of the spindle taper hole is a cylindrical surface, while the spindle taper hole-tool holder joint surface is conical.

[0044] The material of the tested piece in this embodiment is alloy steel, and the contact surface is ground. Refer to attached figure 1 , since the outer surface of the tapered hole test piece is generally a cylindrical surface and the conical joint surface is not parallel, in order to achieve vertical incidence, it is necessary to adjust the tilt ang...

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Abstract

The invention relates to a machine tool spindle-cutter handle connection structure dynamics modeling method based on ultrasonic detection. The method comprises the steps of calculating the included angle between an ultrasonic probe and a taper hole outer surface normal line, and the ultrasonic probe is used for obtaining combining surface reflection echo data and combining surface reflection echodata under different cutter pulling forces according to the included angle; Measuring and calculating the ultrasonic reflectivity of the correction test piece under different pressures; Establishing spindle-in commercial finite element software with ultrasound data Knife handle connection structure dynamic model. The ultrasonic method proposed by the invention can accurately detect the contact stiffness of the spindle-tool shank joint surface, and the dynamic model of the spindle-shank joint structure is established on this basis. the experimental result of the hammering method is less than 2.2%, the accuracy is high, and the universality is good.

Description

technical field [0001] The invention belongs to the field of structural dynamic analysis of machine tools, and relates to a dynamic modeling method for a machine tool spindle-knife handle connection structure based on ultrasonic detection. Background technique [0002] The machine tool spindle is the core component of the machine tool, and the connection surface between the spindle and the tool holder is an indispensable joint surface in the spindle. The machine tool spindle-tool holder connection structure has an important influence on the deformation of the tool tip of the machine tool and the dynamic characteristics of the spindle system. For example, 25% to 50% of the deformation of the tool end comes from the joint surface of the spindle tool holder. With the continuous improvement of the performance requirements of the machine tool and the spindle system, the analysis of the dynamic characteristics of the spindle-tool holder connection structure has become an important...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F2119/06G06F30/23
Inventor杜飞徐超张园园张子涵
OwnerNORTHWESTERN POLYTECHNICAL UNIV