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Method for Determining Outline Dimensions of Stretch Bending Die

A technology for drawing and bending molds and determining methods, which is applied in the direction of instruments, geometric CAD, calculations, etc., can solve problems such as inaccurate outline size design, and achieve the effects of shortening the development cycle, improving accuracy, and improving production efficiency

Active Publication Date: 2019-04-09
CRRC QIQIHAR ROLLING CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a method for determining the profile size of a stretch bending die to solve the problem of inaccurate design of the die profile size in the prior art

Method used

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  • Method for Determining Outline Dimensions of Stretch Bending Die
  • Method for Determining Outline Dimensions of Stretch Bending Die
  • Method for Determining Outline Dimensions of Stretch Bending Die

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Embodiment Construction

[0026] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0027] Such as figure 1 As shown, the embodiment of the present invention is a method for determining the contour size of a stretch bending die. Since the product to be produced is a three-segment arc, when designing the die, it is also designed to be a three-segment arc. Specifically, the stretch-bending die includes a first section of arc, a second section of arc and a third section of arc connected in sequence, the structure of the first section of the stretch-bending mold and the structure of the third section of the stretch-bending mold The arcs have the same structure, that is, the radius and central angle of the first segment of the arc of the stretch bending die are the same as the rad...

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Abstract

The present invention provides a method for determining profile dimensions of a bending die. The method comprises the steps of determining radius and central angle values of a second arc of the bending die according to a fifth arc of a to-be-produced product; determining circle center position information of a first arc and circle center position information of a third arc according to the radius and central angle values of the second arc; determining position information of a first transition point, corresponding to a first measurement point, on the bending die according to position information of the first measurement point on the to-be-produced product; and determining radius and central angle values of the first arc according to position information of a first predetermined point, arc length of a fourth arc, and the circle center position information of the first arc. According to the technical scheme, the problem that in the prior art, profile dimensions of the die are designed inaccurately can be solved.

Description

technical field [0001] The invention relates to the technical field of stretch bending die design, in particular to a method for determining the outline size of a stretch bending die. Background technique [0002] At present, the layers and curved beams of railway heavy-duty and express freight cars are all three-segment arc structures, which are manufactured by stretch-bending technology. Among them, stretch bending means that the blank is bent along the stretch bending die while adding tangential tension to make it molded. [0003] In the prior art, when a blank is subjected to a stretch bending forming process, a stretch bending die is required. Therefore, before stretch bending, it is necessary to design the stretch bending die according to the product. In the prior art, when designing a stretch bending die, numerical simulation technology is mainly used to analyze the deformation mechanism and flow law of the material during the stretch bending forming process, and to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/17
Inventor 蔡廷军李建军张瑞喜曾威雄宋硕陈明丹
Owner CRRC QIQIHAR ROLLING CO LTD
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