JP3113022B2 - Large arc diameter dimensioning method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a CAD (computer-aid)
More particularly, the present invention relates to a method and an apparatus for creating a large-arc-diameter dimension for writing a linear large-arc-diameter (kaminari-dimension) line in drawing data created by a CAD system.

[0002]

2. Description of the Related Art Some CAD systems are provided with a function for easily writing a large circular arc-shaped diameter line in drawing data to be created. An example of a large arc diameter dimension writing function in a conventional CAD system will be described. (1) Display the dimension command menu and select the large arc diameter dimension. (2) Specify the passing point of the dimension line on the arc to be measured, that is, the dimension entry point. (3) Since an auxiliary line is displayed from the dimension entry point toward the center of the arc, a first refraction point, that is, a first node is indicated on the auxiliary line. (4) Specify a second refraction point, that is, a second node, at a point off the auxiliary line. (5) Specify the end point of the dimension line. (6) The dimension line and the dimension value are written so that the end of the dimension value is located at the first node.

[0003]

As described above, in the conventional CAD system, it is possible to relatively easily create a large arc-diameter dimensional line. However, the large arc diameter dimension line that can be automatically created in the conventional CAD system is limited to a two-point broken large arc diameter dimension line having two nodes of a first node and a second node. It was not possible to automatically create a one-point broken large arc diameter dimension line having only one. Therefore, when it is desired to create a one-point broken large arc diameter dimension line, it is necessary to draw the line, and the operation is complicated. In addition, it is troublesome to arbitrarily use the one-point broken large arc diameter and the two-point broken large arc diameter. Depending on the situation of the drawing, the diameter of the large arc at one point break may be appropriate,
In some cases, the large arc diameter of the broken point is appropriate, and it is not preferable that a complicated operation is forced to properly use them.

The present invention has been made in view of such circumstances, and a function of creating a large arc diameter dimension line enables automatic creation of a one-point broken large arc diameter dimension line. It is an object of the present invention to provide a method and an apparatus for creating a large arc diameter, which can easily use an arc diameter and a two-point broken large arc diameter easily.

[0005]

According to the present invention, there is provided a method for creating a large arc diameter dimension according to the present invention, comprising the steps of: when entering a large arc diameter dimension on drawing data in a CAD system, selecting an entry of the large arc diameter dimension; An arc point designating step for designating a dimension entry point on an arc to be measured on a drawing on which a dimension line is to be entered, and a center on the dimension line entry for the dimension entry point on the arc designated by the arc point designation step A center point designating step for designating a point; and a node designating step for designating a node position of a dimension line corresponding to the dimension entry point and the center point on the arc designated by the arc point designating step and the center point designating step. , On the displayed and stored drawing data, on the arc designated by the arc designating step, the center point designating step and the node designating step. Law entry point, is characterized by having a write step of writing the data of the dimension line center point and not lightning based on nodal positions or like large arc diameter line.

[0006] The large arc diameter dimensioning apparatus according to the present invention comprises a C
A command input means for inputting a command including a command for writing a large arc diameter dimension in a large arc diameter dimension creation apparatus for writing a large arc diameter dimension on a drawing in an AD system, and at least a command for writing the large arc diameter dimension Functioning when is input, an arc point designating means for designating a dimension entry point on an arc to be measured on a drawing on which a dimension line is to be entered, and a dimension line entry for the dimension entry point on the arc A center point designating means for designating a center point on the top, a node designating means for designating a node position of a dimension line corresponding to the dimension entry point and the center point on the arc, and displayed and stored. Writing means for writing, on the drawing data, the data of the large arc diameter dimension line based on the dimension entry point on the arc, the dimension line center point and the node position. It is characterized in.

[0007]

According to the method and apparatus for creating a large arc diameter dimension of the present invention, when a dimension line is entered on drawing data in a CAD system, the entry of a large arc diameter dimension is selected and the dimension line is written on the drawing. Indicate the dimension entry point on the arc to be measured, designate the center point on the dimension line entry for the designated dimension entry point on the arc, and further specify the dimension entry point and dimension on the designated arc. In correspondence with the center point on the line entry, the position of the node of the dimension line is designated, and the indicated dimension entry point on the arc, the dimension line center point and the node position are displayed on the displayed and stored drawing data. By writing the data of the large arc diameter dimension line in the shape of a large arc based on, it is possible to automatically create a large arc diameter dimension line that is broken at one point in the creation function of the large arc diameter dimension line. Diameter and 2 It makes it possible to make any proper use of the large arc diameter of broken easily.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a CAD system in which a large arc diameter dimension creating apparatus according to one embodiment of the present invention is incorporated. In the CAD system according to the present embodiment, when drawing a large circular arc-shaped diameter line (hereinafter referred to as “kaminari dimension line”) on drawing data, the dimension line is a measurement object on the drawing to be drawn. Instruct the dimension entry point on the arc, designate the center point on the dimension line entry with respect to the designated dimension entry point on the arc, and further designate the dimension entry point on the arc and the center on the dimension line entry. In accordance with the point, the node position of the dimension line is designated, and on the displayed and stored drawing data, the dimension entry point on the specified arc, the radius of the dimension line based on the center point and the node position, or It is possible to write one-point or two-point broken kaminari dimension data for the diameter.

The CAD system shown in FIG. 1 includes a CAD processing section 1, an input device 2, a display 3, an output device 4, and a storage device 5. CAD processing unit 1 includes a CPU
(Central processing unit) (not shown) and executes CAD processing including large arc diameter dimension creation processing. Input device 2
Includes an operation input device such as a keyboard and a pointing device such as a mouse, and inputs operation input information by an operator and other external information necessary for CAD processing to the CAD processing unit 1. The display 3 is a CAD processing unit 1
Required information such as processed image information by the user and information related to input by the input device 2. The output device 4 includes a plotter, a printer, or the like, and outputs image data processed by the CAD processing unit 1 as a hard copy. Storage device 5
Comprises a disk device such as a hard disk device and operates in association with the CAD processing unit 1 to store data such as image information before, after, and during processing as needed.

In this case, the CAD processing unit 1
In addition to the configuration for executing the D processing, the display control unit 11, the command input unit 12, the arc point instruction unit 13, and the center point instruction unit 14 for executing the large arc diameter dimension creation processing according to the embodiment of the present invention. , A node indicating unit 15, a memory 16, and a writing control unit 17. The display control unit 11 controls display on the display 3. Under the control of the display control unit 11, drawing data and the like are displayed on the screen of the display 3. The command input unit 12 performs a process for allowing an operator to input a command including a command for inputting a Kaminari dimension line, for example, by interactive operation with the screen of the display 3. For this reason, the command input unit 12 controls the display control unit 11 as needed. The arc point indicating unit 13
It functions at least when the above-mentioned kaminari dimension line entry command is input by the command input unit 12, for example, on an arc to be measured on a drawing on which a kaminari dimension line is to be entered by interactive operation with the screen of the display 3. Is performed to allow the operator to specify the dimension entry point, that is, the arc point. The arc point designating unit 13 outputs a meridian passing through the center from the designated arc point when the arc point is designated by the operator, that is, a radius line or a diameter line. (Strictly speaking, the radius line starts from the center of the arc. (The diameter line is a line passing through the center of the arc and reaching the arc point.) Is displayed on the screen. Therefore, the arc point indicating unit 13
Also controls the display control unit 11 as needed.

The center point designating section 14 is provided with the arc point designating section 1.
3 functions at least in a state where an arc point is designated and the radius line or the diameter line is displayed on the screen of the display 3, for example, a center point on the dimension line entry by interactive operation with the screen of the display 3, that is, A process for causing the operator to specify the pseudo center point is performed. For this reason, the center point instruction unit 14 also controls the display control unit 11 as necessary. The node indicating unit 15 functions at least in a state where the pseudo center point is indicated by the center point indicating unit 14,
For example, a process is performed to allow the operator to indicate a node of the Kaminari dimension line by interactive operation with the screen of the display 3. The node indicating unit 15 determines and controls whether to use a one-point broken kaminari dimension line or a two-point broken kaminari dimension line depending on whether the first node is indicated on the radius line or the diameter line. . That is, when the first node is designated on the radius line or the diameter line, it is determined that the line is a one-point broken kaminari dimension line, and the designation of the second node is omitted to terminate the input of the node. If the first node is not indicated on the radius line or the diameter line, it is determined that the line is a two-point broken kaminari dimension line, and the operator is instructed on the second node. For this reason, the node instruction unit 14 also controls the display control unit 11 as needed. The memory 16 includes the display control unit 11
The information including the CAD drawing data to be displayed is stored. The contents stored in the memory 16 are transferred to the storage device 5 as needed. The memory 16 may share a memory used in normal CAD processing in the CAD processing unit 1. The writing control unit 17 displays, on the drawing data displayed on the display 3 and stored in the memory 16, the arc points obtained by the arc point indicating unit 13,
According to the pseudo center point obtained by the center point indicating unit 14 and the node position obtained by the node indicating unit 15,
Write the Kaminari dimension line data of the broken point or two points.

Next, the operation of the CAD system having such a configuration, particularly in relation to the creation of a large arc diameter, will be described in detail with reference to the flowchart shown in FIG. The process shown in FIG. 2 is started as an interrupt process by a command input during normal drawing or editing operation in the CAD system. First, when the operator selects and inputs a radius or diameter kaminari dimension line creation command via the command input unit 12 of the CAD processing unit 1 (step S1), the system sets the radius or diameter kaminari dimension line mode. Is performed (step S2). When the radius or diameter Kaminari dimension line mode is set, the arc point designating unit 13 of the CAD processing unit 1 gives an instruction of an arc dimension entry point, ie, an arc point, to be measured on the drawing on which the dimension line is to be entered. (Step S3). The instruction of the measurement point on the drawing by the arc point instruction unit 13 is performed by requesting an input by the operator through the screen of the display 3 and performing an instruction operation corresponding to the input. When an arc point is specified in step S3, a radius line or a diameter line starting from the arc point and passing through the center of the arc is displayed on the screen of the display 3 (step S3).
4). When the radius line or the diameter line is displayed in step S4, the center point designating unit 14 of the CAD processing unit 1 gives an instruction of the center point on the dimension line entry, that is, the pseudo center point by the operator (step S5). .

Next, an instruction of the first node of the Kaminari dimension line is made by the operator by the node indicating unit 15 of the CAD processing unit 1 (step S6), and the first node is placed on the radius line or the diameter line. It is determined whether or not there is (step S7). If it is determined in step S7 that the first node is on the radius line or the diameter line, the node designating unit 15 displays the step on the drawing data displayed on the display 3 and stored in the memory 16. The writing control unit 17 writes the one-point broken Kaminari dimension line data according to the arc point obtained in S3, the pseudo center point obtained in step S5, and the first node position obtained in step S6.
(Step S8).

If it is determined in step S7 that the first node is not located on the radius line or the diameter line, the operator of the second node of the Kaminari dimension line is further instructed by the node instruction section 15 ( Step S9) On the drawing data displayed on the display 3 and stored in the memory 16, the circular arc point obtained in the step S3, the pseudo center point obtained in the step S5, and the step S6
According to the first node obtained in step S9 and the second node position obtained in step S9, the two-point broken kaminari dimension data is written via the writing control unit 17 (step S10). Note that, when a point other than the radius line or the diameter line is designated as the second node, the node designation unit 15 lowers a perpendicular line from the designated point on the radius line or the diameter line, and places the perpendicular line on the second line. Treated as a node. The dimension value is written at a predetermined position on the kaminari dimension line, for example, near a node on the radius line or the diameter line.If the radius kaminari dimension line mode is selected in advance, the dimension value is the radius before the dimension value. "R" indicating the diameter is added, and when the diameter dimension line mode of diameter is selected in advance, "φ" indicating the diameter is added after the dimension value.

Here, an example of a specific operation in this system will be described in detail. First, as shown in FIG.
In the menu on the editing screen of the AD system,
When "execute" (annotation means an entry of an annotation other than drawing such as a dimension line), a menu as shown in FIG. 4 is displayed. In this menu, "dimension"-"element" Is displayed, a menu as shown in FIG. 5 is further displayed, and a message "Please indicate the type of dimension line" is displayed on the prompt line at the bottom of the screen of the display 3, for example. You. For example, when creating a kaminari dimension line with a radius, turn on the "kaminari" toggle in the menu of Fig. 5 ("*" indicating that the toggle was turned on before "kaminari" on the menu is displayed). , "Radius"-"Execute" (meaning execution of the radius kaminari dimension line creation) is displayed, a menu as shown in FIG. 6 is displayed, and the mode becomes the radius kaminari dimension line creation mode. These selections are made by the operator operating the cursor movement keys or the mouse of the input device 2 while viewing the editing screen on the display 3.

In the menu shown in FIG. 6, "automatic recognition"
When "Execute" is selected, "Please indicate a point on the circumference" is displayed on the prompt line, so that the operator can enter the dimension line on the drawing where the dimension line is to be measured. That is, an instruction of an arc point is required. When the user designates an arc point by operating a mouse or the like, a radius line or a diameter line starting from the arc point and passing through the center of the arc is displayed on the screen of the display 3 as shown in FIG. Next, as shown in FIG. 7, a message "Please indicate the center point of display" is displayed on the prompt line, so that the operator is instructed of the center point on the dimension line entry, that is, the pseudo center point. Required. When the pseudo center point is designated by operating the mouse or the like, as shown in FIG. 8, a message "Please designate the first point" is displayed on the prompt line, thereby prompting the operator to specify the kaminari dimension line. An indication of the first node is required.

In this state, when creating a one-point broken kaminari dimension, a first node is designated on the radius line or the diameter line displayed on the screen by operating a mouse or the like. As shown in FIG. 9, the one-point broken kaminari dimension line connecting the pseudo center point, the node, and the arc point is represented by "R
80 ". On the other hand, when creating a two-point broken kaminari dimension, operate the mouse or the like in the state of FIG. 8 to set the first node to a position other than the radius line or the diameter line displayed on the screen as shown in FIG. When the first node is designated at the position, "Please indicate the next point" is displayed on the prompt line as shown in FIG. 11, so that the operator is notified of the second node of the Kaminari dimension line. Is required. Here, when a second node is indicated on the radius line or the diameter line displayed on the screen by operating a mouse or the like, as shown in FIG. 12, the pseudo center point, the first and second points are displayed. A two-point broken dimension line connecting the node and the arc point is written together with the radius dimension value “R80”.

As described above, a Kaminari dimension line at an arbitrary position can be created very easily. In particular, 1
Along with automatic creation of broken-off kaminari dimension lines, 1
Whether to use the point-break kaminari dimension line or the two-point break kaminari dimension line can be easily used depending on the designated position of the first node, so that the operability is very good. In addition, not only the large arc diameter kaminari dimension line of the radius but also the large arc diameter kaminari dimension line of the diameter can be created in exactly the same manner as described above by selecting the diameter kaminari line creation mode in advance in the state of FIG. In this case, as shown in FIG. 13, the dimension value “φ16” with “φ” indicating the diameter is attached.
"0" is written.

[0019]

As described above, according to the present invention, C
When a dimension line is drawn on drawing data in the AD system, the operator is allowed to select the entry of a large arc diameter dimension, and to designate a dimension entry point on the arc to be measured on the drawing on which the dimension line is to be entered. The center point on the dimension line entry for the dimension entry point on the specified arc is designated, and further, the node position of the dimension line is set in accordance with the designated dimension entry point on the arc and the center point on the dimension line entry. Instructed to write the data of the large arc-diameter dimension line on the displayed and stored drawing data based on the designated dimension entry point, dimension line center point and node position on the arc on the indicated arc data. hand,
The large arc diameter dimension line creation function enables the automatic creation of one-point broken large arc diameter dimension lines, making it easy to freely use one-point broken large arc diameter dimensions and two-point broken large arc diameter dimensions. It is possible to provide a method and an apparatus for creating a large arc diameter dimension that enable the above.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a CAD system in which a large arc diameter dimension creating device according to one embodiment of the present invention is incorporated.

FIG. 2 is a flowchart illustrating a schematic operation of the CAD system of FIG. 1;

FIG. 3 is a view schematically showing a state of a display screen for explaining a schematic operation of the CAD system of FIG. 1;

FIG. 4 is a view schematically showing a state of a display screen for explaining a schematic operation of the CAD system of FIG. 1;

FIG. 5 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system of FIG. 1;

FIG. 6 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system of FIG. 1;

FIG. 7 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system of FIG. 1;

8 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system of FIG. 1;

9 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system of FIG. 1;

FIG. 10 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system of FIG. 1;

11 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system of FIG. 1;

12 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system of FIG. 1;

13 is a diagram schematically illustrating an example of a large arc diameter dimension line for explaining a schematic operation of the CAD system in FIG. 1;

[Explanation of symbols]

1. CAD processing unit 2. Input device 3. Display 3.
4 output device, 5 storage device, 11 display control unit, 12
... Command input unit, 13 ... arc point indicating unit, 14 ... center point indicating unit, 15 ... node indicating unit, 16 ... memory, 17 ... writing control unit.

Claims (10)

(57) [Claims] In a CAD system, when writing a large arc diameter dimension on drawing data in a CAD system, a selection step for selecting entry of a large arc diameter dimension, and a step for selecting a dimension line on an arc to be measured on the drawing to be written. An arc point instruction step of instructing a dimension entry point; a center point instruction step of instructing a center point on a dimension line entry for a dimension entry point on the arc specified by the arc point instruction step; A node designation step for designating a node position of a dimension line corresponding to the dimension entry point and the center point on the arc designated by the center point designation step; and the arc designation step on the displayed and stored drawing data. Based on the dimension entry point, dimension line center point and node position on the arc specified by the center point specifying step and the node specifying step. Large arc diameter creating method characterized by having a write step of writing the data of Nazuma like large arc diameter line. 2. The method according to claim 1, wherein the step of designating a circular arc point includes a step of displaying, on a screen, a radial line starting from a dimension entry point on the designated circular arc and passing through a center point of the circular arc. The method of creating the large arc diameter dimensions described. 3. The node designation step is a step in which a node can be designated at two points, one point on the radius line and one point outside the radius line, and this step is performed among the two nodes. First, it is automatically determined whether the one-point broken large arc diameter dimension line or the two-point broken large arc diameter dimension line is determined according to whether or not one point on the diameter line is designated as a node. 3. The method according to claim 2, further comprising the step of skipping designation of a second node in the case of a dimension line. 4. The method according to claim 1, wherein the writing step is a step of writing data of a large arc diameter dimension line related to a radius. 5. The method according to claim 1, wherein the writing step is a step of writing data of a large arc diameter dimension line relating to a diameter. 6. A large arc diameter dimension creating apparatus for writing a large arc diameter dimension on a drawing in a CAD system, comprising: command input means for inputting a command including a command for entering a large arc diameter dimension; Arc point designating means that functions when a diameter dimension entry command is input, and designates a dimension entry point on an arc to be measured on a drawing on which a dimension line is to be entered, and dimension entry on the arc. A center point indicating means for indicating a center point on the dimension line entry for the point; a node indicating means for indicating a node position of the dimension line in correspondence with the dimension entry point and the center point on the arc; Writing for writing data of a large arc-diameter dimension line on the displayed and stored drawing data on the basis of the dimension entry point on the arc, the dimension line center point and the node position on the displayed drawing data. Large arc diameter creating apparatus characterized by comprising a stage. 7. The arc point designating means includes a means for displaying, on a screen, a radius line starting from a dimension entry point on the designated arc and passing through a center point of the arc.
The large arc diameter dimension creation device described in the above. 8. The node designating means is a means capable of designating a node at two points, one point on the radial line and one point outside the radial line, and this means comprises: First, it is automatically determined whether the one-point broken large arc diameter dimension line or the two-point broken large arc diameter dimension line is determined according to whether or not one point on the diameter line is designated as a node. 2 for dimension lines
8. The large-arc-diameter dimension creating apparatus according to claim 7, further comprising means for skipping designation of a node of a point. 9. The large arc diameter dimension creating apparatus according to claim 6, wherein said writing means is means for writing data of a large arc diameter dimension line related to a radius. 10. The large arc diameter dimension creating apparatus according to claim 6, wherein said writing means is means for writing data of a large arc diameter dimension line relating to a diameter.