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Double-screw pulp-milling mechanism statistical tolerance design method

A twin-screw refiner and design method technology, applied in calculation, special data processing applications, instruments, etc., can solve the problems of long design cycle and high manufacturing cost, and achieve the goal of reducing processing cost, ensuring assembly quality, and reducing manufacturing cost Effect

Inactive Publication Date: 2009-07-29
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, empirical or experimental methods are mainly used to ensure the side clearance and radial clearance of the twin-screw mechanism. These two methods have a long design cycle and high manufacturing costs.

Method used

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  • Double-screw pulp-milling mechanism statistical tolerance design method
  • Double-screw pulp-milling mechanism statistical tolerance design method
  • Double-screw pulp-milling mechanism statistical tolerance design method

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Embodiment Construction

[0033] The present invention is further described below in conjunction with embodiment; Following embodiment is illustrative, not limiting, can not limit protection scope of the present invention with following embodiment.

[0034] A statistical tolerance design method for a twin-screw refining mechanism is to combine the side clearance of the twin-screw refiner, the length of the threaded elements on the screw and the theoretical pitch of the thread to form a linear dimension chain in the axial direction of the twin-screw refining mechanism. The following expression:

[0035] A 0 = Σ i = 1 n + 1 ξ i A i = Σ i = 1 n ...

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Abstract

The invention relates to a design method of twin-screw pulping mechanism statistical tolerance. The requirements for side clearance and diametral clearance of the twin-screw pulping machine are transformed to the requirements for dimension tolerance and form and position tolerances of such parts of the twin-screw pulping machine as a screw element, a mandrel and the like, thus laying a solid foundation for the precision design, tolerance design, assurance of assembly quality and reduction of manufacturing cost. Especially, the design method of computer assistant statistical tolerance based on mixed convolution algorithm, on the premise of guaranteeing the assembly quality of a complex dimension chain, provides more favorable tools and methods for the further reduction of the processing cost of the parts. The design method has important meaning for the design and manufacturing of the twin-screw pulping machine and assurance of the quality of the twin-screw pulping machine.

Description

technical field [0001] The invention belongs to the fields of mechanical engineering and pulping and papermaking engineering, in particular to a statistical tolerance design method for a twin-screw refining mechanism. Background technique [0002] Twin-screw refiner, also known as twin-screw roller refiner and twin-screw kneader, is a new type of resource-saving refining equipment. It adopts the principle of extrusion and cutting to process pulping materials such as poplar chips, cotton Stalks are processed into a certain length of fibrous pulp, and its core component is a twin-screw refining mechanism. The twin-screw refining mechanism is a mechanism composed of two special screws that are parallel to each other, mesh with each other, and rotate in the same direction, and a barrel that matches it. chute, such as figure 1 shown. During the refining process, the pulping material is sent in from the feed port, moves forward along the spiral groove of the forward spiral, and...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 王平李振刚沈晓阳张大克刘少岗
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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