TWI438640B - System and method for drawing a cutting part automatically - Google Patents

Description

Automatically generated system and method for trimming parts

The invention relates to a system and a method for automatically generating a trimming part.

In the design of stamping dies, there are not only a wide variety of trimming parts, but each one has its own specific technical parameters and methods. It can be said that the design of trimming parts is a very complicated process. In the design process of trimming parts, the precision of the parameters is difficult for the designer to control. For example, it is difficult for the designer to control the parameters with extremely high precision such as the straight wall of the cutting edge. After the parameter setting, the compatibility between the parameters is almost impossible. It is checked by hand; the design of the interferometric algorithm and the squared algorithm involves a large amount of mathematical knowledge and rules, and the probability of error in the actual application is very high. In the past, the mold designer only manually calculated and inspected the entire design process, resulting in waste of time, low precision, high probability of error, and poor rationality.

In view of the above, it is necessary to propose an automatic generation system for the trimming part, which can automatically draw the leading edge according to the relevant information of the outer contour line of the trimming part to generate the trimming part.

In view of the above, it is necessary to propose a method for automatically generating a trimming part, which can automatically draw a leading edge according to the relevant information of the outer contour line of the trimming part to generate a trimming part.

An automatic generation system for a trimming part, comprising a computer host, the computer host comprising: a selection module, configured to select an outer contour line of the main view of all the side parts in the mold design image file, and copy the outer contour line of the outer contour line The outer contour line, and the guiding edge is selected on the copied outer contour line; the judging module is configured to judge whether the selected guiding edge is inclined according to the mold image coordinate system; and the drawing module is used for the trimming part When the outer contour line is not inclined, the right side view and the lower view view of the outer contour line of the trimming part are drawn according to the selected guiding edge, and the fixing manner of the trimming part in the upper template is drawn in the three views of the trimming part, A avoidance hole is drawn on the lower template in the three views of the trimming part; a calculation module is configured to calculate the alignment of the selected leading edge according to the coordinate system of the mold image when the selected guiding edge is inclined The angle and the center of the square are calculated according to the calculated squared angle and the center of the square, and the direction of rotation of the outer contour of the trimming part is calculated; the square module is used for calculating the square angle and the square according to the calculated center The rotation direction aligns the outer contour line; and the drawing module is further configured to draw the trimming part according to the selected guiding edge and the contoured outer contour line when the outer contour line of the trimming part is inclined Right and bottom views of the outline.

A method for automatically generating a trimming part, the method comprising the following steps: (a) selecting an outer contour line of a main view of all the side parts in the mold design image, and copying the outer contour line in the layer where the outer contour line is located; (b Selecting a leading edge on the copied outer contour line; (c) determining whether the selected leading edge is inclined according to the coordinate pattern coordinate system; (d) when the selected guiding edge is not inclined, according to the selected The guiding edge draws the right and bottom views of the outer contour of the trimming part, and then proceeds to step (h); (e) when the selected guiding edge is inclined, the selected guiding is calculated according to the coordinate system of the mold image The angle of the leading edge of the leading edge, the center of the pendulum and the direction of rotation of the pendulum; (f) align the outer contour line according to the calculated pendulum angle, the center of the pendulum and the direction of rotation; (g) according to the selected The leading edge and the contoured outer contour line are drawn to the right side view and the lower side view of the outer contour line of the trimming part; (h) the fixing manner of the trimming part in the upper template is drawn in the three views of the trimming part; And (i) drawing a avoidance hole on the lower template in the three views of the trimming part.

Compared with the prior art, the automatic edge-cutting part generating system and method provided by the invention can automatically draw the guiding edge according to the relevant information of the outer contour line of the trimming part to generate the trimming part, thereby saving design time and reducing The cost of the design also increases the accuracy of the design data.

As shown in FIG. 1, it is a system architecture diagram of a preferred embodiment of the automatic edge-trigger part generating system of the present invention. The system mainly includes a computer host 1, a database 2, a display 3, a keyboard 4, and a mouse 5. The computer host 1 is configured to select a trim guiding edge on the outer contour line of the mold, and automatically draw the trimming part according to the information of the selected guiding edge. The database 2 is connected to the computer host 1 for storing relevant information in the design process of the trimming part. The host 1 is connected with a display 3, a keyboard 4 and a mouse 5 for inputting and outputting related materials during the process of trimming the parts.

As shown in FIG. 2, it is a functional module diagram of the computer host 1 in FIG. The computer host 1 includes a selection module 10, a modification module 12, a determination module 14, a calculation module 16, a square module 18, a drawing module 20, an inspection module 22, and a setting module 24.

The selection module 10 is configured to select an outer contour line of the main view of all the side parts in the mold design image, and copy the outer contour line in the layer where the outer contour line is located. The main view of the trimmed part includes the outer contour of the trimmed part and a related template of the trimmed part. The associated template of the trimming part includes an upper template for fixing the trimming part and a lower template for fixing the material cut by the trimmed part. The outer contour is a closed curve, as shown in FIG. 4, and the closed curve P is an outer contour of the trimmed part.

The modification module 12 is configured to modify the layer of the copied outer contour to the current layer.

The selection module 10 is further configured to select a leading edge on the copied outer contour line. The guiding edge refers to the edge on the outer contour of the trimming part for cutting the material, as shown in FIG. 4, and L is the selected guiding edge. The selected guiding edge can be one or two, and no more than two. When the selected guiding edges are two, the two guiding edges cannot be parallel, that is, the two guiding edges must intersect or extend and intersect.

The judging module 14 is configured to judge whether the selected guiding edge is inclined according to the mold figure coordinate system. If the selected guiding edge is neither parallel to the X axis of the mold image coordinate system nor parallel to the Y axis, then the selected guiding edge is determined to be inclined; if the selected guiding edge is parallel to the X axis or parallel On the Y axis, it is judged that the selected leading edge is not inclined. As shown in FIG. 4, the leading edge L is neither parallel to the X axis of the mold pattern coordinate system nor parallel to the Y axis, and the leading edge is judged to be inclined.

The calculation module 16 is configured to calculate a positive angle and a center of the selected leading edge according to the coordinate system of the mold image when the selected guiding edge is inclined. The squared angle is an angle at which the leading edge is less than 45 degrees in the coordinate system of the mold pattern. As shown in FIG. 4, the angle a between the leading edge L and the X axis is 20 degrees, and the angle b with the Y axis is 70 degrees, and the angle a is the right angle of the outer contour. The center of the square is the geometric center of the outer contour of the trimming part.

The calculation module 16 is further configured to calculate a rotation direction of the outer contour of the trimming part according to the calculated square angle and the center of the square. The direction of rotation refers to the direction in which the leading edge of the trimming part outer contour line is parallel to the X-axis or the Y-axis after the outer contour line of the trimming part is rotated. As shown in Fig. 4, when the square angle a is 20 degrees, the center of the square of the outer contour of the trimming part is taken as the origin, and the trimming part is rotated by 20 degrees and then rotated in the direction parallel to the X axis.

The square module 18 is configured to square the outer contour according to the calculated square angle, the center of the square, and the direction of rotation.

The drawing module 20 is configured to draw a right view and a bottom view of the outer contour line of the trimming part according to the selected guiding edge when the outer contour line of the trimming part is not inclined; when the trimming part outer contour line When tilting, the right and bottom views of the outer contour of the trimming part are drawn according to the selected leading edge and the contoured outer contour.

The drawing module 20 is further configured to draw a fixing manner of the trimming part in the upper template in the three views of the trimming part. The upper template refers to a template for fixing a trimmed part. The fixing manner includes: screw fixing, pressing plate fixing and shoulder fixing.

The inspection module 22 is used to check the fixing manner of the trimming part. When the fixing method of the trimming part is screw fixing, the inspection module 20 needs to perform interference check: if it is a screw fixing manner, it is checked whether the inserted screw is within the outer contour line of the trimming part; For more than two screws, check whether the inserted screw is within the outer contour of the trimming part and whether the screws do not intersect. When the trimming part is fixed by a pressing plate or a shoulder, the inspection module 20 calculates a suitable size of the pressing plate or the shoulder according to the side length of the trimming part.

The drawing module 20 is further configured to draw a avoidance hole on the lower template in the three views of the trimming part. The lower template refers to a template for fixing the material to be cut. The avoidance hole is used for cutting the material when the trimming part cuts the material, and the material is cut off from the hole falling from the lower template. The drawing module 20 obtains the thickness of the template under the trimming part from the database 2, and draws the avoiding hole on the lower template according to the thickness of the lower template.

The setting module 24 is configured to establish a relationship between the trimming part, the fixing manner of the trimming part, and the avoiding hole. After the association relationship is established, by querying the attributes of the trimming part, the fixing manner of the trimming part and the avoiding hole of the trimming part can be found.

As shown in FIG. 3, it is a flow chart of a preferred embodiment of the method for automatically generating a trimming part of the present invention. First, in step S10, the selection module 10 selects the outer contour line of the main view of all the side parts in the mold design image, and copies the outer contour line in the layer where the outer contour line is located.

In step S12, the modification module 12 modifies the layer of the copied outer contour to the current layer.

In step S14, the selection module 10 selects a leading edge on the copied outer contour line.

In step S16, the judging module 14 judges whether the selected guiding edge is inclined according to the mold figure coordinate system.

In step S18, when the selected guiding edge is inclined, the calculation module 16 calculates the squared angle and the center of the square of the selected leading edge according to the coordinate system of the mold image file.

In step S20, the calculation module 16 calculates the rotation direction of the trimming component according to the calculated square angle and the center of the square.

In step S22, the square module 18 squares the outer contour according to the calculated square angle, the center of the square, and the direction of rotation.

In step S24, the drawing module 20 draws a right view and a bottom view of the outer contour line of the trimming part. When the outer contour line of the trimming part is not inclined, the drawing module 20 draws a right view and a bottom view of the outer contour line of the trimming part according to the selected guiding edge; when the outer contour line of the trimming part is inclined, drawing The module 20 draws a right side view and a bottom view of the outer contour line of the trimming part according to the selected guiding edge and the contoured outer contour line.

In step S26, the drawing module 20 draws the fixing manner of the trimming part in the upper template in the three views of the trimming part.

In step S28, the inspection module 22 checks the fixing manner of the trimming part.

In step S30, the drawing module 20 draws a avoidance hole on the lower template in the three views of the trimming part. The drawing module 20 obtains the thickness of the template under the trimming part from the database 2, and draws the avoiding hole on the lower template according to the thickness of the lower template.

In step S32, the setting module 24 establishes a relationship between the trimming part, the fixing manner of the trimming part, and the avoiding hole.

In step S16, when the selected leading edge is not tilted, the process proceeds to S24 to draw the right and bottom views of the outer contour of the trimming part.

Computer host. . . 1

Select the module. . . 10

Modify the module. . . 12

Judging the module. . . 14

Calculation module. . . 16

Square module. . . 18

Draw a module. . . 20

Check the module. . . twenty two

Set the module. . . twenty four

Select the outer contour of the main view of all the side parts in the mold design file, and copy the outer outline on the layer where the outer contour is located. . . S10

Modify the layer of the copied outline to the current layer. . . S12

Select the leading edge on the outer contour line. . . S14

Is the selected leading edge tilted? . . . S16

Calculate the squared angle and the center of the selected leading edge according to the coordinate system of the mold image file. . . S18

Calculate the rotation direction of the part according to the calculated squared angle and the center of the square. . . S20

The outer contour is squared according to the calculated pendulum angle, the center of the pendulum and the direction of rotation. . . S22

Draw the right and bottom views of the outer contour of the trimmed part. . . S24

Draw the way in which the trimming part is fixed on the upper template in the three views of the trimming part. . . S26

Check the way the trimming part is fixed. . . S28

Draw a hole in the lower template in the three views of the trimming part. . . S30

The trimming part, the fixing manner of the trimming part and the avoiding hole are related. . . S32

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a hardware architecture diagram of a preferred embodiment of the automatic edge-trigger part generation system of the present invention.

FIG. 2 is a functional module diagram of the computer host shown in FIG. 1.

3 is a flow chart of a preferred embodiment of the method for automatically generating a trimmed part of the present invention.

Figure 4 is a front elevational view of the outer contour of the trimming part of the present invention.

Select the outer contour of the main view of all the side parts in the mold design file, and copy the outer outline on the layer where the outer contour is located. . . S10

Modify the layer of the copied outline to the current layer. . . S12

Select the leading edge on the outer contour line. . . S14

Is the selected leading edge tilted? . . . S16

Calculate the squared angle and the center of the selected leading edge according to the coordinate system of the mold image file. . . S18

Calculate the rotation direction of the part according to the calculated squared angle and the center of the square. . . S20

The outer contour is squared according to the calculated pendulum angle, the center of the pendulum and the direction of rotation. . . S22

Draw the right and bottom views of the outer contour of the trimmed part. . . S24

Draw the way in which the trimming part is fixed on the upper template in the three views of the trimming part. . . S26

Check the way the trimming part is fixed. . . S28

Draw a hole in the lower template in the three views of the trimming part. . . S30

The trimming part, the fixing manner of the trimming part and the avoiding hole are related. . . S32

Claims (8)

An automatic generation system for a trimming part, comprising a computer host, the computer host comprising: a selection module, configured to select an outer contour line of the main view of all the side parts in the mold design image file, and copy the outer contour line of the outer contour line The outer contour line, and the guiding edge is selected on the copied outer contour line; the judging module is configured to judge whether the selected guiding edge is inclined according to the mold image coordinate system; and the drawing module is used for the trimming part When the outer contour line is not inclined, the right side view and the lower view view of the outer contour line of the trimming part are drawn according to the selected guiding edge, and the fixing manner of the trimming part in the upper template is drawn in the three views of the trimming part, A avoidance hole is drawn on the lower template in the three views of the trimming part; a calculation module is configured to calculate the alignment of the selected leading edge according to the coordinate system of the mold image when the selected guiding edge is inclined The angle and the center of the square are calculated according to the calculated squared angle and the center of the square, and the direction of rotation of the outer contour of the trimming part is calculated; the square module is used for calculating the square angle and the square according to the calculated center The rotation direction aligns the outer contour line; and the drawing module is further configured to draw the trimming part according to the selected guiding edge and the contoured outer contour line when the outer contour line of the trimming part is inclined Right and bottom views of the outline. The automatic trimming system for trimming parts according to claim 1, wherein the computer host further comprises: an inspection module for checking a fixing manner of the trimming part; and a setting module for the trimming part And the manner of fixing the trimming part and the avoiding hole establish an association relationship. The automatic trimming system for trimming parts according to claim 1, wherein the computer host further comprises: a modifying module, configured to modify the layer of the copied outer contour to the current layer. The automatic edge-cutting part generating system according to claim 1, wherein the guiding edge refers to an edge of the trimming part for cutting the material. The method of automatically forming a trimming part according to claim 1, wherein the fixing method of the trimming part comprises: screw fixing, pressing plate fixing and shoulder fixing. A method for automatically generating a trimming part, the method comprising the following steps: (a) selecting an outer contour line of a main view of all the side parts in the mold design image, and copying the outer contour line in the layer where the outer contour line is located; (b Selecting a leading edge on the copied outer contour line; (c) determining whether the selected leading edge is inclined according to the coordinate pattern coordinate system; (d) when the selected guiding edge is not inclined, according to the selected The guiding edge draws the right and bottom views of the outer contour of the trimming part, and then proceeds to step (h); (e) when the selected guiding edge is inclined, the selected guiding is calculated according to the coordinate system of the mold image The angle of the leading edge of the leading edge, the center of the pendulum and the direction of rotation of the pendulum; (f) align the outer contour line according to the calculated pendulum angle, the center of the pendulum and the direction of rotation; (g) according to the selected The leading edge and the contoured outer contour line are drawn to the right side view and the lower side view of the outer contour line of the trimming part; (h) the fixing manner of the trimming part in the upper template is drawn in the three views of the trimming part; And (i) drawing a avoidance hole on the lower template in the three views of the trimming part. The method for automatically generating a trimming part according to claim 6, wherein the method further comprises the steps of: checking a fixing manner of the trimming part; and fixing the trimming part, the trimming part, and the avoiding Bit holes establish an association. The method for automatically generating a trimming part according to claim 6, wherein after the step (a), the method further comprises the step of: modifying the layer of the copied outer contour to the current layer.