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Pressure angle

About: Pressure angle is a research topic. Over the lifetime, 1373 publications have been published within this topic receiving 10245 citations. The topic is also known as: angle of obliquity.


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Proceedings ArticleDOI
01 Jan 2003
TL;DR: In this paper, the authors present a study on the influence of the pressure angle on the contact ratio, and through it on the length of contact and the load capacity of helical gears.
Abstract: The minimum number of teeth to avoid undercut on involute spur and helical gears depends on the pressure angle, among some other geometrical parameters. Higher number of teeth is required if the pressure angle becomes smaller. However, the contact ratio may be increased by reducing the pressure angle, which means the load is distributed along a longer line of contact. In many cases, even if undercut arises and teeth are weakened, both effects may result in higher load capacity for the gears. This paper presents a study on the influence of the pressure angle on the contact ratio, and through it on the length of contact and the load capacity, including a discussion on the condition to improve the load capacity by reducing the pressure angle beyond the undercut limit.Copyright © 2003 by ASME

4 citations

30 Jun 2013
TL;DR: In this paper, a frontal cylindrical milling tool is tilted from the perpendicular to the axis of symmetry of an Archimedean worm by an angle roughly equal with the pressure angle of the worm flank.
Abstract: This paper presents aspects of a new manufacturing technology cylindrical Archimedean worms on NC lathes using standard frontal – cylindrical milling tools. The frontal-cylindrical milling tools is tilted from the perpendicular to the axis of symmetry of the worm by an angle roughly equal with the pressure angle of the worm flank. At the same time the symmetry axis of frontal-cylindrical milling tools is contained in a plane parallel to the axis of symmetry of the worm. The plane is positioned for the symmetry axis at a distance that we call eccentricity. Depending on the location of the milling tool, shall be determined the shape of the profile resulted in axial plane to be able to be compared to the nominal profile of an Archimedean worm. The profile shape is determined using coordinate transformations. The program that generates the necessary points is AutoLISP and representations are made in AutoCAD.

4 citations

Journal Article
TL;DR: In this paper, the air flow rate is increased linearly according to the changes of the pitch angle of an impeller at an axial turbo fan and the static pressure rises are shown to 108 Pa, 122Pa, 141 Pa, 188 Pa and 63 Pa at the same cases.
Abstract: The aim of this paper is to suggest one efficient method for the various requirements of performance during the process designing and producing an impeller. The study considers that the revisions of a pitch angle of an impeller at an axial turbo fan affect an air flow rates and a static pressure rise. The axial turbo fan specified with the 250 Pa maximum static pressure and 1300 CMH fan air flow rates was tested and analyzed by CFD. The Numerical results show that the air flow rates are calculated to 1,175 CMH, 1,223 CMH, 1,270 CMH, 1,340 CMH and 800 CMH in cases that the pitch angles are respectively. Also the static pressure rises are shown to 108 Pa, 122Pa, 141 Pa, 188 Pa and 63 Pa at the same cases. The air flow rate is increased linearly according to the changes of the pitch angle from and the maximum air flow rate passing the impeller is increased to over at the case of pitch angle compared with the reference case of pitch angle. The static pressure rise is increased linearly according to the changes of the pitch angle from , too. The static pressure rise at the pitch angle is increased to over compared with the pitch angle. The result shows that the revisions of pitch angle make the static pressure rise increase widely. However the air flow rates and the static pressure rise at the pitch angle are suddenly decreased because of over-changed pitch angle.

4 citations

Journal ArticleDOI
TL;DR: In this article, the authors presented formulas for determining the link sizes and slider offset for a predetermined stroke with an acceptable pressure angle at the extremes of slider travel as well as by a given angle between the crosshead guide of the slider and a plane in which the crank revolves.

4 citations

Patent
30 Aug 2006
TL;DR: In this paper, the utility model of a cutting edge of a chip flute of a shaving cutters is characterized. And the meshing angle of the cutting edge is increased by making use of the pressure angle correcting method, curvature tonicity method, peak reducing and valley filling method, etc.
Abstract: The utility model relates to a shaving cutter for processing a gear The shaving cutter comprises a disc cutter body 1 and a shaving cutter teeth 2 which are evenly distributed The utility model is characterized in that the front cutter face 3 of a cutting edge of a chip flute of the shaving cutter is vertical to a tooth face 4, the meshing angle of the shaving cutter 2 is smaller than the pressure angle within the range of 0 DEG to 3 DEG, and the crossed axial angle is selected within the range of 12 DEG to 15 DEG according to the module of the gear Simultaneously, the thickness and the diameter of the cutter body 1 are increased, the shape of each chip flute is changed, and the number of the chip flutes is increased The utility model breaks the conventional design that the meshing angle is increased The utility model chooses the proper crossed axial angle and corrects the tooth profiled of the shaving cutter by making use of the pressure angle correcting method, the curvature tonicity method, the peak reducing and valley filling method, etc Thereby, the precision of the shaving gear and the durability of the shaving cutter are improved greatly

4 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202313
202244
202127
202038
201960
201841