CN109858162A - A kind of fixation formula model of design elements drawing expressional scheme - Google Patents

Abstract

The invention relates to the technical field of drawing representation of mechanical parts, and more particularly, to a fixed program model for designing a drawing representation scheme of parts. Through the stylized design process, the purpose is clear, the steps are clear, the structure of the parts is accurately grasped, and the structure of the parts can be grasped quickly and effectively. Determine the expression scheme of any part, save labor costs, and avoid the technical hidden dangers of repeated modification in the production process of the part drawing guidance product to the greatest extent, greatly improve the efficiency, and can be used for part model surveying and drawing, part drawing dismantling, 3D model transfer to two The design process of component drawings such as dimensional engineering drawings.

Description

A kind of fixation formula model of design elements drawing expressional scheme

Technical field

The present invention relates to machine components drawing expression technology fields, more specifically, are related to a kind of design elements list of drawing Up to the fixation formula model of scheme.

Background technique

Part drawing plays an important role in current machinery industry, is the important technology foundation for producing product.Draw part drawing Most important content is exactly the expressional scheme of determining part drawing, and national standard provides various Representation of Drawing, but for how It determines part expressional scheme, does not provide effective method.In practice process, for the part of various structures, expression side The determination of case is generally required to deliberate repeatedly, constantly be repaired with certain blindness in order to determine the reasonable expressional scheme of part Change, it finally can not be fully up to expectations.Existing part drawing expressional scheme determines that operation has the following problems.1, main view is projected The sequence of position and projecting direction is not clear.In the case that main view projected position is not known, projecting direction can not be determined.2, About main view direction selection, can most express the description in the direction of part body characteristics, practical operation is difficult to hold, it is ambiguous not Clearly.3, after wherein main view determines, not clear step and program continue to determine the scheme of other views, actual mechanical process The final verdict of middle part-solutions is still difficult.

Summary of the invention

The purpose of the present invention is to provide a kind of fixation formula models of design elements drawing expressional scheme, efficiently solve Part drawing expressional scheme determine Difficulty, allow the design of part expressional scheme according to stylized step purposefully It is clear effectively to decide, avoid the blindness and inefficient of part drawing expressional scheme design.

In order to achieve the above objectives, technical solution provided by the invention are as follows:

A kind of fixation formula model of design elements drawing expressional scheme, comprising the following steps:

S1, main view projected position is determined: the projected position selection gradually work according to part in the machine of the main view Position, Working position or natural placement location determine；

S2, selected main view projecting direction: selection is perpendicular to part large scale or main axis of rotation direction, simultaneous selection center of gravity Occupy right direction；

S3, respectively determine part drawing basic views quantity and expressional scheme: basic views quantity by structure complexity from It is chosen in six basic views；The each basic views expressional scheme of part drawing needs to select according to structure respectively.The part drawing For basic views to reflect based on External Shape structure, expressional scheme uses basic profile view；The basic views of the part drawing To reflect based on inside parts structure, expressional scheme uses full sectional view；The basic views of the part drawing are in part External structure need to take into account reflection, and when design of part is when the basic views projecting direction structure is again symmetrical, expressional scheme is using half-sectional View, when design of part is in the basic views projecting direction asymmetry, using partial sectional view；

S4, determine local structure view Representation of Drawing: the parts locally structure that the basic views do not express clearly, then from zero by Secondary increase local structure view, expressional scheme are determined according to partial structurtes feature.Local structure view quantity can be from zero gradually Increase selection, local structure view can be according to partial structurtes feature corresponding selection.The parts locally knot not expressed clearly Structure is contour structures, and expressional scheme uses partial view；The parts locally structure not expressed clearly is internal structure, expression Scheme uses partial sectional view；The parts locally structure not expressed clearly is parts locally truncation surface shape, expressional scheme Using cross-section diagram；The parts locally structure not expressed clearly is the contour structures of local dip, and expressional scheme is using strabismus Figure；The parts locally structure not expressed clearly is local dip internal structure, and expressional scheme uses oblique sectional view；It is described not The parts locally small structure expressed clearly, expressional scheme use partial enlarged view.

Further, the selection of main view projected position can be according to the shape and each section of part Each part in the S1 Relative position between structure is determined by primary and secondary weight.

Further, several procedures need to be passed through when the part is processed in the machine, and the Working position of each process is respectively not It is identical, select operating position or physical slot as the projected position of main view.

Further, the part has multi-step process again because movement causes operating position to be not fixed, then according to part Physical slot projection.

Further, axis or large scale side of the main view projecting direction selection perpendicular to main revolving structure in the S2 To, at the same labyrinth forward, put convenient for the right hand or direction that center of gravity is kept right.

Further, basic views quantity is 1-6 in the S3, the selection of basic views quantity based on three-view diagram into Row increase and decrease.

Further, in the S3 basic views expression elder generation quantification then each determining expression.

Further, the partial structurtes that part is expressed in the S4, can be started from scratch according to partial structurtes feature according to Secondary increase local structure view；The partial view includes partial view, partial sectional view, partial enlarged view, and oblique view tiltedly cuts open View, cross-section diagram；Every kind of local structure view uniquely corresponds to a kind of parts locally structure.

Compared with prior art, the advantageous effect of present invention is that:

The present invention provides a kind of fixation formula models of design elements drawing expressional scheme, pass through stylized design process, mesh Define, step is clear, and it is accurate that the structure of part is held, and can quickly and effectively determine the expressional scheme of any part, save It saves labor costs, and utmostly avoids the technology hidden danger modified repeatedly in part drawing guide product production process, significantly Efficiency is improved, can be used for part model mapping, part drawing tears picture open, and threedimensional model turns the design of the part drawings such as two-dimensional engineering graphic Process.

Specific embodiment

The technical scheme in the embodiments of the invention will be clearly and completely described below.Obviously, described implementation Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects It encloses.

A kind of fixation formula model of design elements drawing expressional scheme, comprising the following steps:

S1, main view projected position is determined: the projected position selection gradually work according to part in the machine of the main view Position, Working position or natural placement location determine that the selection of main view projected position can understand reaction part Each part Relative position between shape and Each part；

Part has certain operating position in the machine, when selecting the main view projected position of part, optional and part The consistent position projection in operating position in the machine, or projected with natural placement location same position.Part physical slot Judgement can be determined according to the visual perception " small end upper, big end is under " of people.Part in the fabrication process, especially When machining, it is fixed and is clamped in and is processed on certain position.It is optional when selecting main view projected position It selects and is projected with the consistent position of the Working position of part.When part has several manufacturing procedures that part Working position is caused to change When, Working position, operating position or the physical slot that can choose the main manufacturing procedure of part are projected position；

S2, selected main view projecting direction: it selects perpendicular to part large scale or the main axis of rotation side that center of gravity is kept right simultaneously To；The projecting direction of main view can most reflect the shape feature of part, can more clearly reflect the part Each part Shape and its relative position.After main view projected position determines, main view projecting direction is generally perpendicular direction to large scale direction, Or the axis direction perpendicular to main revolving structure, while labyrinth forward, put convenient for the right hand or side that center of gravity is kept right To projection.The operating position of moving parts is simultaneously not fixed, and should be projected according to part physical slot；

S3, respectively determining part drawing embody scheme: the quantity and expressional scheme of the part drawing basic views are selected respectively It takes.Basic views quantity is chosen from six basic views by structure complexity.The each basic views expressional scheme of part drawing It needs to select according to structure respectively.For the part drawing basic views to reflect based on External Shape structure, expressional scheme uses base This profile view；For the basic views of the part drawing to reflect based on inside parts structure, expressional scheme uses full sectional view；Institute The basic views for stating part drawing need to take into account reflection for the external and internal compositions of part, when design of part is in the basic views projecting direction When structure is again symmetrical, expressional scheme uses half sectional view, when design of part is in the basic views projecting direction asymmetry, uses Partial sectional view；

S4, determine local structure view Representation of Drawing: the parts locally structure that the basic views do not express clearly, then from zero by Secondary increase local structure view, expressional scheme are determined according to partial structurtes feature.Local structure view quantity can be from zero gradually Increase selection, local structure view can be according to partial structurtes feature corresponding selection.The parts locally knot not expressed clearly Structure is contour structures, and expressional scheme uses partial view；The parts locally structure not expressed clearly is internal structure, expression Scheme uses partial sectional view；The parts locally structure not expressed clearly is parts locally truncation surface shape, expressional scheme Using cross-section diagram；The parts locally structure not expressed clearly is the contour structures of local dip, and expressional scheme is using strabismus Figure；The parts locally structure not expressed clearly is local dip internal structure, and expressional scheme uses oblique sectional view；It is described not The parts locally small structure expressed clearly, expressional scheme use partial enlarged view.

In the present embodiment, each basic views and local structure view embody method referring to national standard handbook It completes, the Representation of Drawing that national standard handbook is clearly loaded with is not in present patent application range.

Only presently preferred embodiments of the present invention is explained in detail above, but the present invention is not limited to above-described embodiment, Within the knowledge of a person skilled in the art, it can also make without departing from the purpose of the present invention each Kind variation, various change should all be included in the protection scope of the present invention.

Claims (7)

1. a fixed program model of a design part drawing expression scheme, is characterized in that, comprises the following steps: S1. Determine the projection position of the main view: the selection of the projection position of the main view is successively determined according to the working position, processing position or natural placement position of the part in the machine; S2. Select the projection direction of the main view: select the direction perpendicular to the large size of the part or the direction of the rotation axis, and the center of gravity is on the right; S3. Determine the number and expression scheme of the basic views of the part drawing respectively: the quantity is selected from the six basic views; the expression scheme is selected according to the characteristics of each selected basic view: the basic view of the part drawing is to reflect the part The overall shape structure is the main, and the basic shape view is used for the expression scheme; the basic view of the part drawing is mainly to reflect the overall internal structure of the part, and the full sectional view is used for the expression scheme; When the structure in the projection direction of the basic view is symmetrical, the expression scheme adopts a half-section view, and when the part structure is asymmetric in the projection direction of the basic view, a partial section view is adopted; S4. Determine the drawing method of the supplementary view drawing: if the local structure of the part is not clearly expressed in the basic view, then the partial structure view will be added one by one from zero, and the expression scheme is determined according to the characteristics of the local structure. The partial view is used for the scheme; the partial structure of the part that is not clearly expressed is the internal structure, and the partial cross-sectional view is used to express the scheme; the partial structure of the part that is not clearly expressed is the local section shape of the part, and the cross-sectional view is used to express the scheme; the partial structure of the part that is not clearly expressed is For the partially inclined external structure, an oblique view is used to express the plan; the partial structure of the part that is not clearly expressed is a partially inclined internal structure, and an oblique section view is used to express the plan. 2. A fixed program model for designing a drawing representation scheme of a part according to claim 1, wherein the selection of the projection position of the front view in the S1 can clearly reflect the shape of each part structure of the part and the relative position between each part structure . 3. A fixed program model for designing a drawing expression scheme of a part according to claim 1 or 2, wherein the part needs to go through several processes when being processed in a machine, and the processing positions of each process are different. , select the natural position or the working position as the main view projection position. 4. A fixed program model for designing a drawing representation scheme of a part according to claim 1 or 2, characterized in that: when the machining process of the part is different and the working position of the part is not fixed, the natural position is selected as the front view projection position. 5. The fixed formula model of a design part drawing expression scheme according to claim 1, wherein the projection direction of the front view in the S2 is selected to be perpendicular to the axis direction of the large size or the main rotating structure, while the complex structure is directed toward the axis direction. In the front, it is convenient for the right hand to be placed or the center of gravity is to the right. 6 . The fixed program model of a drawing representation scheme of a design part according to claim 1 , wherein the representation of the basic views in the S3 first determines the quantity and then determines the representation method for each. 7 . 7. The fixed program model of a design part drawing expression scheme according to claim 1, characterized in that: in the described S4, in order to express the local structure of the part, a partial structure view can be sequentially added from zero according to the local structure feature; The partial views include partial views, partial cross-sectional views, partial enlarged views, oblique views, oblique cross-sectional views, and cross-sectional views; each partial structural view uniquely corresponds to a partial structure of a part.