Plate part groove feature identification method and drawing system

Abstract

The invention provides a plate part groove feature identification method and a drawing system. The method comprises the following steps: analyzing all planes and non-closed arc surfaces in a view; searching a combination form of adjacent planes and non-closed arc surfaces from the planes and the non-closed arc surfaces; and according to the combination form, the identification of the bottom depth and the chamfer characteristics is increased, so that the specific types of the plate part grooves are identified. According to the method, the specific types of the plate part grooves can be identified according to the characteristic key points of the plate part grooves, and then the plate part grooves are marked according to the marking specifications, so that later part machining is facilitated.

Description

Technical Field

[0001] The invention belongs to the field of auxiliary parts processing, and in particular relates to a plate-type parts slot feature recognition method and a drawing system. Background Art

[0002] For the various common grooves on plate parts, feature recognition is required to facilitate automatic annotation of groove-related information and dimensions during subsequent drawing.

[0003] At present, conventional automatic dimensioning is mainly based on plane dimensioning and hole position dimensioning. For the slots on the board, plane dimensioning alone is not enough to express them completely. If similar hole radius dimensions are added, there will be a large number of repeated redundant dimensions for slots containing multiple arcs. Therefore, it is necessary to identify the relevant features of the slots and then give clear and standardized dimensioning. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a plate part slot feature recognition method and a drawing system, which can automatically recognize the type of plate part slot and then provide standardized dimensioning.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a method for identifying the characteristics of a plate-type part slot, the method comprising:

[0006] Analyze all planes and non-closed arc surfaces in the view;

[0007] From the planes and the non-closed arc surfaces, searching for a combination of adjacent planes and the non-closed arc surfaces;

[0008] According to the combination, the recognition of the bottom depth and chamfer features is added, so as to identify the specific type of the plate part slot.

[0009] According to the above solution, all planes and non-closed arc surfaces in the analytical view specifically include:

[0010] Get the view ID;

[0011] Traverse all objects in the view by view ID

[0012] The type of the object is determined, and plane surfaces and non-closed arc surfaces are filtered out.

[0013] According to the above solution, all the planes and non-closed arc surfaces in the analytical view also include:

[0014] The information of the filtered plane and the non-closed arc surface is stored and recorded, and the information includes the side length of the plane and the radius of the arc.

[0015] According to the above scheme, the combination of searching adjacent planes and non-closed arc surfaces specifically includes:

[0016] Select a plane from the planes and non-closed arc surfaces;

[0017] Use the selected plane as the seed surface and search for adjacent arc surfaces through the common edge condition;

[0018] The seed surface and the arc surface with which it shares a common edge are grouped together, and the group is used as a whole for subsequent judgment.

[0019] According to the above scheme, when the group includes four parallel planes, the connection is four arc surfaces with openings facing inwards, and the bottom depth exceeds the preset depth value, the combination of the structures in the group is an internal square groove;

[0020] When the group includes two mutually parallel planes, the connection is two arc surfaces with openings facing inwards, and the bottom depth exceeds a preset depth value, then the combination of the structures in the group is an internal annular groove;

[0021] When the group includes two mutually parallel planes, the connection is two arc surfaces with openings facing outwards, and the two arc surfaces are connected by a plane, then the combination of the structures in the group is an edge-opening groove;

[0022] When the group includes two mutually parallel planes, and the connection point is an arc surface with an opening facing outward, the combination of the structures in the group is a U-shaped groove;

[0023] When the group includes two mutually perpendicular planes, and the connection point is an arc surface with an opening facing outward, the combination of the structures in the group is an L-shaped groove.

[0024] According to the above scheme, the bottom depth is obtained through the information of the plane itself.

[0025] According to the above solution, the opening inwards and the opening outwards are obtained through the information carried by the arc surface.

[0026] A method for automatically marking plate part slots automatically marks the specific types of plate part slots obtained based on the plate part slot feature recognition method according to marking specifications.

[0027] According to the above method, the marking specifications include:

[0028] Internal square groove: mark the straight surface and radius, but not the hole position and center line;

[0029] Internal annular groove: no straight surface, but radius, hole position and center line;

[0030] Edge opening slot: mark the straight surface, but do not mark the hole position and center line;

[0031] U-shaped groove: mark the straight surface, radius, hole position and center line;

[0032] L-slot: marked with straight surface and radius.

[0033] A drawing system comprises the plate-like part slot feature recognition method.

[0034] The beneficial effects of the present invention are as follows: based on the characteristic key points of the plate-type part slot, the plane and the non-closed arc surface are analyzed, and based on the combination form between the plane and the arc surface, plus the bottom depth and chamfer features, the specific type of the plate-type part slot is identified, and then it is marked according to the marking specifications, which facilitates the subsequent processing of the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a method flow chart of an embodiment of the present invention.

[0036] Figure 2 It is a rendering of an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] The present invention provides a method for identifying slot features of plate parts, such as Figure 1 As shown, the method includes:

[0039] S1. Analyze all planes and non-closed arc surfaces in the view, specifically including: obtaining the view identification Tag; traversing all objects in the view through the view identification Tag; judging the type of the object, and filtering out planes and non-closed arc surfaces. Since the purpose of the present invention is mainly to identify the characteristics of plate part slots, the present invention decomposes the plate part slots and mainly analyzes the planes and non-closed arc surfaces. Other graphics are not considered in the present invention.

[0040] Furthermore, in order to facilitate dimensioning later, the information of the filtered planes and non-closed arc surfaces may be stored and recorded, for example, the side length and normal of the plane, the radius of the arc, and the position and direction of the center point of the arc.

[0041] S2. From the planes and non-closed arc surfaces, search for combinations of adjacent planes and non-closed arc surfaces.

[0042] Since the slots of plate parts are mainly composed of various planes and non-closed arc surfaces, the present invention selects a plane from the planes and non-closed arc surfaces; mainly uses the selected plane as a seed surface, and searches for adjacent non-closed arc surfaces through the common edge condition; the seed surface and the arc surfaces with the same edge are grouped together, and the group is used as a whole for subsequent judgment.

[0043] When multiple planes share edges with the same non-closed arc surface, these planes and arc surfaces are put into one group. Similarly, when multiple non-closed arc surfaces share edges with the same plane, these non-closed arc surfaces and planes are also put into one group.

[0044] S3. According to the combination, the recognition of the bottom depth and chamfer features is added to identify the specific type of the plate part slot.

[0045] Specifically, when the group includes four planes that are parallel to each other, the connection points are four arc surfaces with openings facing inwards, and the bottom depth exceeds a preset depth value, then the combination of the structures in the group is an internal square groove.

[0046] When the group includes two mutually parallel planes, the connection is two arc surfaces with openings facing inwards, and the bottom depth exceeds a preset depth value, the combination of the structures in the group is an internal annular groove.

[0047] When the group includes two mutually parallel planes, the connection point is two arc surfaces with openings facing outwards, and the two arc surfaces are connected by a plane, then the combination of the structures in the group is an edge-opening groove.

[0048] When the group includes two mutually parallel planes, and the connection is an arc surface with an opening facing outward, the combination of the structures in the group is a U-shaped groove. In this case, the arc surface is regarded as a chamfer.

[0049] When the group includes two mutually perpendicular planes, and the connection is an arc surface with an opening facing outward, the combination of the structures in the group is an L-shaped groove. In this case, the arc surface is regarded as a chamfer.

[0050] Among them, since the plane (i.e., plate-like structure) found in the drawing software or model has thickness information itself, the bottom depth is obtained through the information of the plane itself, and the height on the plane normal is the bottom depth. The opening inward and the opening outward are obtained through the information of the arc surface itself.

[0051] As a second aspect of the present invention, the present invention further provides a method for automatically marking plate part slots, which automatically marks the specific types of plate part slots obtained based on the plate part slot feature recognition method according to the marking specifications.

[0052] The marking specifications include: internal square groove: mark the straight surface and radius, but not the hole position and center line; internal annular groove: mark the radius, hole position and center line, but not the straight surface; edge opening groove: mark the straight surface, but not the hole position and center line; U-shaped groove: mark the straight surface, radius, hole position and center line; L-shaped groove: mark the straight surface and radius. The effect diagram is as follows Figure 2 As shown in the figure, it can be seen that all annotations comply with the annotation specifications, are clear and complete, and there are no redundant dimension marks.

[0053] As a third aspect of the present invention, the present invention also provides a drawing system having the plate-like part slot feature recognition method. Industrial modeling systems or drawing systems can adopt the method of the present invention, such as UG (UnigraphicsNX), etc. The generated drawings can be used in CAD, etc.

[0054] In summary, the present invention can use specific combined dimensions to clearly and standardizedly express the relevant features of the plate-type part slots in drawings, thereby facilitating the subsequent processing of parts.

[0055] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A method for identifying slot features of plate parts, characterized in that: The method includes: Analyze all planes and non-closed arc surfaces in the view; From the planes and the non-closed arc surfaces, searching for a combination of adjacent planes and the non-closed arc surfaces; According to the combination, the recognition of the bottom depth and chamfer features is added, so as to identify the specific type of the plate part slot.

2. The plate-like component slot feature recognition method according to claim 1, characterized in that: All planes and non-closed arc surfaces in the analytical view specifically include: Get the view ID; Traverse all objects in the view by view ID The type of the object is determined, and plane surfaces and non-closed arc surfaces are filtered out.

3. The plate-like component slot feature recognition method according to claim 2, characterized in that: All planes and non-closed arc surfaces in the analytical view also include: The information of the filtered plane and the non-closed arc surface is stored and recorded, and the information includes the side length of the plane and the radius of the arc.

4. The plate-like component slot feature recognition method according to claim 1, characterized in that: The combination of searching adjacent planes and non-closed arc surfaces specifically includes: Select a plane from the planes and non-closed arc surfaces; Use the selected plane as the seed surface and search for adjacent arc surfaces through the common edge condition; The seed surface and the arc surface with which it shares a common edge are grouped together, and the group is used as a whole for subsequent judgment.

5. The plate-type component slot feature recognition method according to claim 4, characterized in that: When the group includes four parallel planes, the connection is four arc surfaces with openings facing inwards, and the bottom depth exceeds the preset depth value, then the combination of the structures in the group is an internal square groove; When the group includes two mutually parallel planes, the connection is two arc surfaces with openings facing inwards, and the bottom depth exceeds a preset depth value, then the combination of the structures in the group is an internal annular groove; When the group includes two mutually parallel planes, the connection is two arc surfaces with openings facing outwards, and the two arc surfaces are connected by a plane, then the combination of the structures in the group is an edge-opening groove; When the group includes two mutually parallel planes, and the connection point is an arc surface with an opening facing outward, the combination of the structures in the group is a U-shaped groove; When the group includes two mutually perpendicular planes, and the connection point is an arc surface with an opening facing outward, the combination of the structures in the group is an L-shaped groove.

6. The plate component slot feature recognition method according to claim 5, characterized in that: The bottom depth is obtained through the information of the plane itself.

7. The plate-like component slot feature recognition method according to claim 5, characterized in that: The opening inwards and the opening outwards are obtained through the information of the arc surface.

8. A method for automatically marking slots of plate parts, characterized in that: The specific type of the plate part slot obtained based on the plate part slot feature recognition method described in any one of claims 1 to 7 is automatically marked according to the marking specification.

9. The method for automatically marking slots for plate parts according to claim 8, characterized in that: The marking specifications include: Internal square groove: mark the straight surface and radius, but not the hole position and center line; Internal annular groove: no straight surface, but radius, hole position and center line; Edge opening slot: mark the straight surface, but do not mark the hole position and center line; U-shaped groove: mark the straight surface, radius, hole position and center line; L-slot: marked with straight surface and radius.

10. A drawing system, characterized in that: A plate-like part slot feature recognition method according to any one of claims 1 to 7.

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