JP2858628B2 - Automatic programming device for coil spring forming machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic programming device for a coil spring forming machine.

[0002]

2. Description of the Related Art FIG. 9 is a flowchart showing a process of generating a molding program using an automatic programming device for a coil spring molding machine and forming a desired coil spring. First, the wire material diameter used for forming the coil spring, the coil spring pitch of the coil spring, the coiling tool for determining the diameter of the coil spring, and the forming start position of the pitch tool for determining the pitch of the coil spring (hereinafter, referred to as
Parameter data including each tool, the maximum feed speed of the line feed, and the like are set in advance (step S71). Next, coil shape data including the number of coil turns and the coil diameter is set (step S72), and tool operation data for operating the coiling tool and the pitch tool are operated according to a predetermined conversion rule from the coil spring pitch and coil shape data of the parameter data. Then, a forming program for performing a forming operation according to a predetermined conversion rule is generated from the parameter data and the tool operation data (step S74). A molding operation is performed by the generated molding program (step S75). If a coil spring having a desired shape cannot be obtained (step S76), the tool operation data is corrected (step S77), and a molding program is generated again (step S74). ), The forming operation (step S75) is repeated until a coil spring having a desired shape is formed.

FIG. 10A shows an example of actual coil shape data. The coil shape data is sequentially set according to a desired coil shape as a set of the number of coil turns and the coil diameter. As shown in FIG. 10B, in this example, the winding start is set to a coil diameter of 20 [mm], and the diameter of the subsequent four turns is set to 40 mm.
[mm], and the coil spring pitch of the parameter data is 8 [mm].

The procedure for generating the tool operation data is as follows. First, coiling tool operation data for determining the operation of the coiling tool and pitch tool operation data for determining the operation of the pitch tool are generated from the coil shape data and the coil spring pitch of the parameter data. Then, tool operation data is generated from the coiling tool operation data and the pitch tool operation data. Hereinafter, the procedure of generating the tool operation data will be described with reference to FIGS. 11 (A), (B), (C) and FIG. 10 (A). The coiling tool operation data example of FIG. 11A is generated based on the coil shape data of FIG.
The coil diameter is represented by the amount of movement of the coiling tool from the reference position. Note that an empty portion of the data indicates that there is no change from the immediately preceding position. In the operation of the coiling tool shown in FIG. 11A, one turn from the beginning of the winding does not move, and the next 3.80 turns moves in the plus direction from the reference position by 20.00. The coil is moved to 0.00 (return to the reference position), and finally, the molding operation is completed by winding 0.10 with the coiling tool stopped. In the formation of the coil spring, it is necessary to return the coiling tool to the reference position in order to continue the next forming operation when one forming operation is completed and the wire is cut.
The pitch tool operation data in FIG. 11B is composed of the number of coil turns and the coil spring pitch, and the coil spring pitch is represented by the amount of movement of the pitch tool from the reference position for determining the pitch of the coil spring. The operation of the pitch tool in FIG. 11 (B) is as follows: 0.30 turns at the beginning of the winding and 0.10 turns at the end of the winding are formed at a pitch of zero so as to flatten the end face of the coil spring (end winding correction). After the initial end-winding correction, 1.00 turns the pitch tool from the reference position to 8.
00, and before the end-of-winding correction, the pitch tool is returned from 8.00 to 0.00 (reference position) so that the pitch becomes zero at 1.00 winding. And the middle two.
Data is generated to hold the position of 8.00 for the 60-volume portion. The tool operation data shown in FIG. 11C includes the number of coil turns, the coil diameter, and the coil spring pitch, and is created by combining the coiling tool operation data and the pitch tool operation data as described above. When the moving operations of other tools overlap during one moving operation, tool operation data is generated by obtaining an intermediate point from the turns ratio.
For example, in FIG. 11C, the pitch tool operation data has a total number of turns of 0.30 to 1.30 and 8.00 from the reference position.
However, since the operation of the coiling tool overlaps from the total number of turns of 1.00, an intermediate point 5.60 is calculated, and the total number of turns is from 0.30 to 1.00, and from 1.00 to 1.
Two of up to 30 turns are divided into moving operations. FIG.
The total number of turns added to the left of 1 (A) to (C) indicates the integrated value of the number of turns term.

[0005] A line feed amount command is generated from the number of coil turns of the tool operation data generated as described above, a moving amount of the coiling tool is calculated from the coil diameter, and a pitch tool movement command is generated from the coil spring pitch. A molding program is generated by adding a command such as a moving speed, and FIG.
The coil spring shown in (D) is manufactured.

FIG. 8 is a block diagram showing an example of a conventional automatic programming device for a coil spring forming machine. The input data DI is input from the keyboard 1 by the operator, and the input control unit 4 switches the setting data DS and the switching command and setting for switching the corresponding storage unit depending on whether the setting data DS is the coil shape data DC or the tool operation data DT. A setting position command for determining a data setting target portion to be set in the data DS, a tool operation data generation command for generating the tool operation data DT from the coil shape data DC, and a forming program 11 from the tool operation data DT. It is classified into a molding program generation command and input to the data setting control unit 5. The data setting control unit 5 selects whether to output the setting data DS to the shape data storage unit 6 or the tool operation data storage unit 7 according to the switching command, and further sets a data setting target location in the setting data DS according to the setting position command. And the setting data DS
To the shape data storage unit 6 or the tool operation data storage unit 7
Output to Further, the data setting control unit 5 outputs a start command A to the tool operation generating unit 8 according to the tool operation data generation command, and outputs a start command B to the forming program generating unit 9 according to the forming program generating command. The tool operation data generator 8 coiling the coil shape data DC stored in the shape data storage unit 6 and the coil spring pitch of the parameter data DP preset in the parameter storage unit 10 according to a predetermined conversion rule in response to the start command A. The tool operation data and the pitch tool operation data are generated, and the tool operation data DT is generated from the coiling tool operation data and the pitch tool operation data, and is stored in the tool operation data storage unit 7. The forming program generation unit 9 receives the tool operation data DT stored in the tool operation data storage unit 7 in response to the start command B and the parameter data such as the coiling tool, the pitch tool, and the maximum speed of line feed stored in the parameter storage unit 10. The molding program 11 is generated according to a predetermined conversion rule based on the DP. The data display control unit 3 causes the CRT 2 to display the data stored in the shape data storage unit 6 or the tool operation data storage unit 7 via the data setting control unit 5 according to the selection of the data setting control unit 5.

[0007]

A coil spring obtained by actually performing a forming operation with a coil spring forming machine using a forming program generated by the above-mentioned automatic programming device for a conventional coil spring forming machine is generally used. Has a slight difference from the set coil shape. This is because there are unspecified elements due to the material of the wire, etc.In order to obtain the desired coil shape, it is necessary to correct the tool operation data, generate the forming program, and repeat until the desired coil shape is obtained in the forming operation procedure Have to do it. However, since the tool operation data is a collection of data of the minute movement amount of each tool, the operator identifies the data setting target location to correct the data by looking at the data on the screen and imaging the shape in the head. Had to be fixed, and there was a problem that it was easy to make a mistake.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an automatic programming device for a coil spring which can easily specify a data correction portion and verify data. And

[0009]

According to the present invention, in order to achieve the above object, a shape for displaying a coil spring shape created from coil shape data or tool operation data on a screen in the same screen as data setting is provided. Display means, data settings,
Marker display means for clearly indicating which part of the coil spring is the data setting target area to be changed, and integration of the number of coil turns from the starting point of the coil spring to the data setting target area to be changed and changed from the starting point of the coil spring This is realized by having the number-of-turns guide display means indicating the value.

[0010]

According to the present invention, a coil spring shape is displayed on a screen based on coil shape data or tool operation data.
Furthermore, since the marker and coil coil count integrated value that clearly indicate the data setting target location are displayed, the operator can not only input the coil shape data while checking the displayed coil shape, but also input the tool operation data. In the change, the data setting target portion can be visually determined based on the displayed marker and the integrated number of coil turns, and the shape after the data change can be confirmed.

[0011]

1 is a block diagram of an automatic programming device for a coil spring forming machine embodying the present invention.
The same blocks as those in the block diagram of the prior art in FIG. The shape data matching unit 12 stores the coil shape data DC stored in the shape data storage unit 6.
And the coil spring pitch of the parameter data DP set in advance from the parameter storage unit 10 to obtain three items of the number of coil turns, coil diameter and coil spring pitch required for shape display. Is obtained. Tool operation data matching unit 13
Is the tool operation data DT from the tool operation data storage unit 7.
And input the coil shape data DC from the shape data storage unit 6 and add the first coil diameter of the coil shape data DC as a reference diameter to the coil diameter of the tool operation data DT to obtain a coil diameter required for shape display. The number of coil turns, coil diameter and coil spring pitch required for shape display
The item data DTG is obtained. The data normalizing unit 15 selects the shape data matching unit 12 according to the selection of the data setting control unit 5.
Alternatively, each data DCG of the number of coil turns, coil diameter and coil spring pitch matched by the tool operation data matching unit 13
Alternatively, a DTG is input, normalized to a data sequence DCR of a drawing unit of a predetermined number of turns (in this embodiment, a unit of 0.5 turns), and output to the shape / guidance display control unit 16. The number-of-turns calculation unit 14 inputs the data setting target portion from the data setting control unit 5 and the three items of data DCG and DTG that have been matched from the shape data matching unit 12 or the tool operation data matching unit 13, and outputs the first number of coil turns. , The number of coil turns DCW up to the data setting target location is calculated by integrating the data to the data setting target location, and output to the shape / guidance display control unit 16. The shape / guidance display control unit 16 includes a data normalizing unit 15
According to the winding direction of the coil of the parameter data DP previously set in the parameter data storage unit 10 from the data train DCR of the coil diameter and the coil spring pitch normalized for every 0.5 winding, In the case of the right winding, a solid line and a dashed line are alternately drawn on the screen of the CRT 2 via the data display control unit 3 every 0.5 turns from the solid line. A marker is displayed at the position of the coil shape on the screen corresponding to the number of coil turns DCW, and the number of coil turns DCW is numerically displayed on the screen.

FIG. 5 shows an example of data obtained by matching the tool operation data shown in FIG. The reference diameter of the tool operation data in FIG. 11 is 20.0, the diameter data in FIG. 5 is a value obtained by adding 20.0 to the tool operation data in FIG. 11, and the coil spring pitch is 0.00. FIG. 11
Is used as is.

FIGS. 3 and 4 are diagrams for explaining the normalization in units of 0.5 turns based on the matched data example shown in FIG.
FIG. 3 is a diagram for explaining the normalization of the coil diameter. The horizontal axis indicates the number of coil turns and the vertical axis indicates the change in the coil diameter. The numerical value added to the downward arrow indicates the matched coil of FIG. The number of turns (the number of turns in parentheses is the cumulative number of turns) indicates the coil diameter below. As shown by the upward arrow in FIG. 3, the normalization of the coil diameter is performed based on the value of the coil diameter in units of 0.5 turns and the proportional relationship between the number of coil turns and the position of the coil diameter that have been matched. Then, the value of the odd-numbered data is made to be positive and the value of the even-numbered data is made negative to complete the normalization of the coil diameter. FIG. 4 is a diagram for explaining the normalization of the coil spring pitch. The horizontal axis indicates the number of coil turns, and the vertical axis indicates the change in the coil spring pitch, with the vertical axis indicating the coil spring pitch. The lower part shows the coil spring pitch in the determined number of coil turns (the number of parentheses is the cumulative number of turns). As shown by the upward arrow in FIG. 4, the normalization of the coil spring pitch is based on the value of the coil spring pitch for every 0.5 turns, and the proportion of the matched coil turns and the position of the coil spring pitch. Find the data string of spring pitch,
Normalization is completed by halving the value of the data sequence to obtain a data sequence of the coil spring pitch in units of 0.5 turns, and further obtaining a data sequence of the coil spring pitch of the accumulated value.

FIG. 6 shows data normalized based on the data example shown in FIG. 5, and includes the number of coil turns, the coil diameter position (a data string of the normalized coil diameter), and the coil spring pitch (the normalized coil diameter). A coil spring pitch data sequence) and a coil spring pitch position (cumulative value coil spring pitch data sequence) are used, and the coil diameter position and the coil spring pitch position are used as coil drawing data.

FIG. 2 is a flowchart showing a series of processes for displaying the shape and guidance. This process is executed each time data is set / changed or a data setting target position is changed. It is determined which of the coil shape data and the tool operation data is being set or changed (step S1), and in the case of the coil shape data, the coil shape data is added with the coil spring pitch of the preset parameter data. The data is matched with the data of the three items of the number of coil turns, the coil diameter, and the coil spring pitch (step S2).
In the case of the tool operation data, the initial coil diameter of the coil shape data is used as a reference diameter and added to each coil diameter of the tool operation data to match the data of the three items of the number of coil turns, the coil diameter, and the coil spring pitch (step). S
3). The number of coil turns from the head of the aligned data to the data setting target location is integrated, and the number of coil turns from the start of winding to the data setting target location is obtained (step S4). Next, the coil diameter and the coil spring pitch of the matched data are normalized in units of 0.5 winding (step S5), and it is determined whether or not the winding is right-handed (step S6).
The coil shape is drawn every 0.5 turns in the order of the broken line (step S7), and when not right-handed, the coil shape is drawn every 0.5 turns in the order of the broken line and the solid line (step S8). On the drawn coil shape, a marker is displayed at a position corresponding to the number of coil windings up to the previously determined data setting target position (step S9), and the number of coil windings is numerically displayed on the screen (step S10).

FIG. 7 is an example of a screen display of an automatic programming device for a coil spring forming machine embodying the present invention.
21 is a tool operation data setting display, 22 is a reverse display indicating a data setting target portion, 23 is parameter data setting display, 24 is a shape display, 25 is a coil shape displayed based on the tool operation data, and 26 is data setting A marker 27 indicating the target location is an integrated value of the number of turns to the data setting target location. As for the coil shape of 25, the winding direction of the coil can be identified by drawing the shape of the coil viewed from the side with a solid line on the front side and a dotted line on the back side. That is, in this example, the upper left is the starting point of coil winding, and drawing of the coil shape is started by the solid line indicating the front side, and it can be seen that the coil is right-handed in the traveling direction. In the case of left-handed winding, drawing of the coil shape is started by a broken line from the upper left starting point.

[0017]

As described above, according to the automatic programming device for a coil spring forming machine of the present invention, the set data is immediately displayed as a coil shape on the screen, so that the set data can be easily verified. In addition to preventing data entry errors, when changing data, the data location to be changed can be easily specified by the coil shape and marker display on the screen and the guidance display of the number of turns integrated value, and the desired coil shape can be specified. It is possible to shorten the molding preparation time until obtaining.

[Brief description of the drawings]

FIG. 1 is a block diagram of an automatic programming device for a coil spring forming machine embodying the present invention.

FIG. 2 is a flowchart of a shape / guidance display process that implements the apparatus of the present invention.

FIG. 3 is a diagram illustrating normalization of a coil diameter by the device of the present invention.

FIG. 4 is a diagram illustrating normalization of a coil spring pitch by the device of the present invention.

FIG. 5 is a diagram showing an example of matching data by the apparatus of the present invention.

FIG. 6 is a diagram showing an example of normalized data by the device of the present invention.

FIG. 7 is a screen display example in which the device of the present invention is implemented.

FIG. 8 is a block diagram of a conventional automatic programming device for a coil spring forming machine.

FIG. 9 is a flowchart showing a process up to spring forming by the conventional device.

FIG. 10 is a diagram showing an example of coil shape data used in the conventional device and the device of the present invention.

FIG. 11 is a diagram showing examples of coiling tool operation data, pitch tool operation data, and tool operation data used in the conventional apparatus and the apparatus of the present invention.

[Explanation of symbols]

 Reference Signs List 1 keyboard 2 CRT 3 data display control unit 4 input control unit 5 data setting control unit 6 shape data storage unit 7 tool operation data storage unit 8 tool operation data generation unit 9 molding program generation unit 10 parameter storage unit 11 molding program 12 shape data Matching unit 13 Tool operation data matching unit 14 Number of turns calculation unit 15 Data normalization unit 16 Shape / guidance display control unit

Continuation of front page (58) Field surveyed (Int. Cl. ⁶ , DB name) G05B 19/409 B21F 35/00

Claims (1)

(57) [Claims] 1. Coil shape data composed of a coil diameter and the number of coil turns set based on a desired shape of a coil spring, and parameter data consisting of various constants including a preset pitch and wire material diameter set in advance. A coil shape data conversion means for generating tool operation data composed of a moving amount of the coiling tool for determining the coil diameter and a moving amount of the pitch tool for determining the coil spring pitch; and the coiling tool and the pitch from the tool operation data. An automatic programming device for a coil spring forming machine that includes tool operation data conversion means for determining a moving amount and a speed of a tool and a line feeding amount and a line feeding speed, respectively, and generates a forming program in the form of a numerical control program for forming a coil spring. In the above, the coil shape data, tool operation data, and From the parameter data, a shape display means for displaying the shape of the coil spring to be formed, and a data setting target portion for setting and changing the coil shape data and the tool operation data to a coil spring shape displayed by the shape display means. A coil display means for displaying the number of coil turns from a start point of the coil shape data and the tool operation data to the data setting target position, and displaying the accumulated number of coil turns. Automatic programming device for spring forming machines.