JP2894542B2 - Spring shape correcting method of NC spring forming machine and NC spring forming machine with spring shape correcting function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an NC spring forming machine and a spring shape correcting method for correcting deformation due to various factors during continuous forming of a formed coil spring by a program method, and an NC spring forming machine with a spring shape correcting function. .

[0002]

2. Description of the Related Art In order to manufacture a spring by automatic molding by NC in a program system, a spring is continuously formed based on a spring forming machine shown in FIG. 1 and a control diagram shown in FIG. That is, FIG. 1 is a view showing a main part of an NC spring forming machine. A wire 1 wound in a hoop shape is strongly pinched by a feed roller 2 and a pinching roller 3 through a straightener (not shown), and is horizontally held by a quill 4. Sent to. The feed roller 2 is mounted on an output shaft of a servo motor 6 driven and controlled by an NC device (not shown) and is rotated. The nipping roller 3 is connected to a gear shaft of a gear 8 meshed with a gear 7 provided on the output shaft of the servo motor 6. The wire rod is attached and held by a spring (not shown) or pressing means such as air pressure so as not to slip strongly.

The side surface of the front end of the quill 4 is cut off vertically so that the wire does not protrude, and a pitch tool described later is arranged at this position. A metal core 11 is fixedly arranged on the front face of the end face of the quill 4, and a shaping tool 12 having a shaping surface 12 a is arranged so as to be horizontally movable in front of the mandrel 11. The forming tool 12 has a feed screw 14 which is rotated by a servomotor 13 which is driven and controlled by an NC device.
With this, the wire is advanced and retracted in the wire feeding direction and the position is controlled.

The pitch tool 16 is a wedge 16a whose upper end surface forms an edge inclined in a vertical plane. The pitch tool 16 is arranged on the cut side surface of the quill 4 so as to be movable in the vertical direction perpendicular to the wire feed direction. It is moved up and down by a feed screw 18 which is rotated by a servomotor 17 whose drive is controlled, and the position is controlled.

[0005] Further, a cutting tool 21 is disposed on the upper surface of the metal core 11 so as to be vertically movable. The cutting tool 21 is positioned such that its shearing blade surface 21a shears the rear end of the forming spring with the vertical surface 11a of the cored bar 11, and a feed screw rotated by a servomotor 22 driven and controlled by an NC device. 23 controls the position. The cutting tool can be freely driven by a cam, hydraulic means, or the like.

FIG. 2 is a control block diagram for performing automatic programming of a conventional coil spring forming machine. Coil forming data such as coil diameter, free length, and pitch, tool operating data such as forming tool moving distance, pitch tool moving distance, cutting tool moving distance, and wire rod feed amount data are input from a keyboard 31 to a data input control unit 32. . The data input control unit 32 rearranges the input data like a molding program and stores it in the program data storage unit 33. In the molding program calculation section 34, the program storage section 3
3, coil shape data, tool operation data,
A wire feed amount data is read out, and a pitch tool position X, a forming tool position Y, a wire feed amount Z, and a cutting tool position A to be loaded on a program are calculated to create and store a forming program.

The calculated movement amounts of the X-axis (pitch tool), Y-axis (forming tool), and Z-axis (wire feed) are stored in the movement amount storage unit 35. The stored numerical data is converted into a pulse in the numerical data / pulse converter 36, and drives each servomotor. Data display storage unit 37
Is for displaying on the CRT 38 a numerical value in which the data of the formed spring shape stored in the program storage unit 33 is stored.

Table 1 shows an example of a compression spring forming program shown in FIG. However, X is the position of the pitch tool, Y is the position of the forming tool, A is the cutting tool position and the origin is set to zero, and the current value is commanded in absolute. Z instructs the wire feed amount incrementally. F is X, S is Y
, V represents the feed speed of Z, and W represents the feed speed of A.

[Table 1]

The procedure for manufacturing a spring according to the molding program shown in Table 1 will be described with reference to flowcharts shown in FIGS. Operation is started in step S1, and N is set to zero in step S2. In step S3, N is increased to N + 1.
That is, N1 is set. In step S4, the G function is read. That is, Z25.0, F80, S50, V50, W80
Read. X, Y, and A are origins.

In step S5, the process proceeds to a subroutine for calculating the X-axis movement amount. Step S21 of axis movement amount calculation processing
Is set as the program storage data X0.0 as the target value.
In step S22, the process moves from the target position to the current position, that is, X0.0, as the movement amount, and moves to the main routine. In step S6, the process proceeds to a subroutine for calculating the Y-axis movement amount. Similarly, the process proceeds to the main routine with Y0.0 being set in step S21 and Y0.0 being set in step S22 in the axis movement amount calculation processing.

[0011] proceeds to the subroutine of Z-axis movement amount calculation in step S7, step likewise axial movement amount calculation step S21
To Z25.0, and to Z25.0 in step S22, and shift to the main routine. Since the Z-axis command is issued incrementally, the current position is set to zero. In step S8, the process proceeds to the subroutine for calculating the A-axis movement amount, and similarly, in the axis movement amount calculation processing, A0.0 in step S21, step S22
And set to A0.0, and proceed to the main routine.

In step S9, movement of four axes of X, Y, Z, and A axes is started. In this case, the wire 1 is 25.0 mm
Moving. In step S10, it is determined whether the movement of each axis has been completed. If NO, this determination is repeated. Y
In the case of ES, an end-to-end contact portion of the spring shown in FIG. 3 is formed. In step S11, it is determined whether there is program data in the next N. Since there is data, YES is determined and the process proceeds to step S3 where N2 is set.

In step S4, X3.0, Z50.
0 is read. Steps S5, S6, S7, S8, S
9. The process proceeds to step S10. If the movement is completed, the pitch tool 16 moves forward by 3.0 mm, and the wire 1 moves to 50.
mm to form the end winding rising portion of FIG.

Similarly, the process proceeds from step S11 to step S3, where N3 is set. In step S4, Y0.3, Z1
0.0 is read, the steps are sequentially shifted, and the step S10 is completed. If YES, the forming tool 12 is retracted by 0.3 mm, and the wire is sent out by 10 mm at Z10.0, so that the end winding is raised and the end of the end winding is formed. The coil diameter in FIG. 3 is corrected by the small reduction in the coil diameter.

Similarly, the steps sequentially shift to step S
In step 3, N4 is set, and in step S4, Z300.0 is read. The steps sequentially move to complete the movement of step S10 to form the body of the coil in FIG. Similarly, the steps are shifted to read Y0.0 and Z10.0 of N5, the position of the forming tool 12 is returned to the initial position, the wire is fed out by 10 mm, the corrected coil diameter is returned, and the correction of FIG. Will be returned.

In the same manner, the steps are shifted to X0.
0, Z50.0 is read, the pitch tool 16 is returned to the initial position, and the wire is fed out by 50 mm to form the end-turn falling portion in FIG. Similarly, shift the steps to N
7, Z25.0 is read, and the wire 1 is fed out by 25 mm to form the end-to-end contact portion shown in FIG.

Similarly, the steps are shifted to N30 A30.
0 is read, the cutting 21 is advanced by 30 mm, and the wire is cut between the core 21 and the wire A10.
0 is read, the cutting tool 21 returns to the initial position, and one compression spring is formed. Next step S10
In step S11, it is determined whether there is program data in the next N at step S11. If the answer is NO, it is determined at step S12 whether there is an operation stop signal from an operation panel (not shown). continue,
If YES, the operation is stopped in step S13. A molded spring has been manufactured by such a procedure.

Japanese Unexamined Patent Publication No. Hei 5-261462 discloses, for example, a winding start winding, a pitch rising portion, an equal pitch portion, a pitch falling portion, a winding end winding according to the shape of a coil spring. An operation program is created by calculating the development length of each divided part, setting the movement amount of the pitch tool from the pitch amount of each part, and inputting those values using a keyboard. This operation program is created by inserting the above values into a preset reference operation program using a keyboard.

In order to correct the operating program, keys for correcting the respective parts of the spring to + and-are assigned on a keyboard, and one spring is prototyped based on the operating program to check the shape. If there is, press the key corresponding to that part the required number of times, create correction data of a value obtained by multiplying the number of times pressed on the system program by the correction unit,
In addition, the correction data is added to the operation data, which is transferred to the operation program for correction, and a spring is formed based on the corrected operation program.

[0020]

When a product is mass-produced, the coil shape of the spring is changed due to a change in the wire diameter of the wire rod, a difference in residual stress, abrasion of the tool, or a deformation of the machine due to a change in operating temperature due to continuous operation. Changes slightly. If this variation is within the tolerance of the product, no product loss will occur. However, in the above-described manufacturing method using the NC spring forming machine, if the deviation is out of tolerance, the loss increases, so it is necessary to stop the machine and correct the operation program. In addition, there is a problem that production efficiency is hindered by the operation stop time. Further, there is a device which has a function of measuring the shape of the coil spring and performs automatic correction, but there is a problem that the device is expensive and the manufacturing cost is increased.

Japanese Unexamined Patent Publication No. Hei 5-261462 discloses an operation program, which makes a prototype of a spring manufactured based on this program to see if it is finished to a target spring, checks its shape, and prepares a correction program. It is intended to make a regular spring, and it is necessary to stop the machine in the same manner when correcting the shape. Further, only a spring pattern that has been created in advance can be modified, and it is complicated to create a pattern of an irregularly shaped spring such as an irregular pitch or a tapered coil. Since a large number of input keys for correction are allocated to ten keys, there is a problem that the input keys are easily mistaken or malfunction.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object the purpose of properly checking a product by sampling and inspecting the product by using an NC machine before the product is out of tolerance. An object of the present invention is to provide a spring shape correcting method of an NC spring forming machine and an NC spring forming machine with a spring shape correcting function which can easily correct pitch, coil diameter, free length, etc. without stopping the machine during mass production. is there.

[0023]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a wire feed, a forming tool, a pitch, and a wire forming method based on a coil spring shape data and a tool operation data. A spring in which a pulse generator of a correction amount input means, a movement amount correction count unit, and a correction count storage unit are added to a control unit of an NC spring forming machine that forms a coil spring by NC control of all or a part of a tool and a cutting tool. In the shape correction method, input the required movement correction code for the pitch tool, forming tool, wire feed, and cutting tool prior to operation, and extract and inspect the product during continuous forming.
Coil diameter of appropriately checked measured formed form spring by査, spring free length, corrected according to deformation such as coil pitch 必
A correction amount to be corrected when the main portion occurs entered the movement amount correction count unit by a pulse generator, a new you entered
The pulse count value (A) corresponding to the correction amount and the initial value of the movement amount correction count unit stored in the correction count storage unit or 1
The count value (B) before the molding cycle is
In forming the program operation unit in cut by calculating the A-B +, - determine the correction value (C), the corresponding movement amount correction code during molding in the middle turn this correction value for the next molding cycle (C) Program In addition to the corresponding data, the molding program is corrected, and the spring molding is continuously performed based on the corrected molding program.

Also , the wire rod fed out by the NC control is bent to the coil by the NC control to the forming tool which is controlled in position by the NC control on the front surface of the quill, and is formed into a predetermined pitch by the pitch tool whose position is controlled by the NC control. And a keyboard for inputting necessary data and a correction code, a wire feed data, a spring shape data, and a tool operation input from the keyboard. A data control unit that creates required program data based on the data and the like;
A program data storage unit for storing the program data created by the data control unit; and forming and storing and inputting a molding program based on the shape data, tool operation data, wire feed data, etc. stored in the program data storage unit. A forming program calculation unit for calculating a correction value based on the movement amount correction count number of the pitch tool, forming tool, wire, etc. and correcting the data of the forming program , and moving the pitch tool, forming tool, wire, etc.
A movement amount storage unit for storing the amount, and a movement amount storage unit for storing the movement amount.
A numerical data / pulse converter for converting the converted numerical data into a pulse, a pulse generator for inputting correction-related data,
A moving amount correction counting unit that counts the number of pulses input from the pulse generator and outputs a count value to the molding program calculation unit; an initial value of the moving amount correction counting unit;
It is comprises a correction count storage unit for outputting the input memory to store values a count value of one molding cycle before the forming program calculating unit, a product sampling inspection during continuous molding
Therefore, the coil diameter of the formed spring, which was checked and measured as appropriate,
Items that need to be corrected according to deformations such as spring free length and coil pitch
The amount of correction to be corrected when a location
Input to the movement amount correction count section, calculate the correction value at the break of the spring forming cycle during operation, and
The data is corrected during the process.

[0025]

[Action] When the automatic molding program is created, the correction code numbers G80, G8 of the X, Y, Z, and A axes from the keyboard.
1, G82, and G83 are input in whole or in part. Check the product appropriately by sampling inspection.
And click, the coil diameter of the molded spring by the measurement result, the spring itself
Derived length, when the correction required 箇 offices in coil pitch or the like occurs, the correction quantity equivalent pulse type respectively from the pulse generator, keep counting the number of pulses A.

On the other hand, the initial value of the movement amount correction count unit or 1
The count value A before the molding cycle is stored as B in the correction count storage unit, and the correction value C = (AB) is calculated by the molding program operation unit at the end of one cycle of the molding spring, and the next time. In the corresponding step of the forming spring cycle, the program data is sequentially corrected with the correction value to create a correction program and continuously produce the corrected forming spring.
As a result, the program data can be modified during the operation without stopping the operation to improve the production efficiency. Further, the correction operation can be facilitated.

[0027]

FIG. 6 is a control diagram for performing automatic programming of the NC spring forming machine of the present invention. The same blocks as those in FIG. 2 are denoted by the same reference numerals and description thereof is omitted. In this figure, the free length, pitch,
When the coil diameter is measured and becomes close to the limit within the product tolerance, the movement correction amount is 39A for the X axis of the manually rotating pulse generator, that is, the pitch tool 16, 39B for the Y axis of the forming tool 12, and the wire feed. 39C for the Z-axis and 39D for the A-axis of the cutting tool 21 are provided.

Normally, X, Y and A are 0.001 m per pulse.
m and Z are 0.1 mm per pulse. The input pulse is used as the count number A by the movement amount correction counting unit 40. In this example, the counter of the movement amount correction counting unit 40 uses a format that can be added or subtracted. In this example, the accumulated pulse is X,
Y, A is 0.1mm, and and Z is a single corrected molding 10.0mm as quantity program calculating unit 3 when a 100 pulse as a single correction amount when it becomes 100 pulses
Enter 4 Further corrected count molding program correction command to the molding program operation unit 3 4 to the storage unit 41 is provided is the front operation moving amount correction counting unit 40 when the initial value A
Is input as B.

In this configuration, the correction code G80 of the pitch tool 16, the correction code G81 of the forming tool 12, the correction code G82 of the feed amount of the wire 1, and the correction code G8 of the cutting tool 21 are automatically programmed by the compression spring automatic program shown in FIG.
Table 2 shows a molding program in which No. 3 was inserted. G of correction symbol
80, G81, G82 and G83 are inputted from the keyboard 1 at the time of the automatic molding program before the operation.

[Table 2]

FIGS. 7 to 1 are flowcharts showing a procedure for manufacturing a molded spring by a molding program with a correction operation shown in Table 2.
Description will be made based on 0.

In step S31, the process proceeds to a subroutine for initializing correction. In step S51, it is determined whether there is a program input of pitch tool correction G80, and YE is determined.
In step S52 since it is S, to match the the 1000 1000 Because the storage number B of X-axis of the correction count storage unit 4 1 movement amount correction count unit counts are counted before the operation of the A, for example, the first zero correction value C of the forming program operation unit 3 4 shifts to step S53.

If NO, the process similarly proceeds to step S53, where it is determined whether or not a program input of the molding tool correction G81 has been input. If YES, the Y-axis count of the movement amount correction counting unit 40 is similarly performed at step S54. Number A
And correcting the count storage unit 4 1 of Y-axis storage number B A example 1
000, the correction value C is set to zero, and the routine goes to Step S55. If NO, similarly proceed to step S55,
It is determined whether or not the program input of the wire feed correction G82 has been made.
The axis count number A and the stored count number B are represented by A , for example, 10
00, the correction value C is set to zero, and the routine goes to Step S57.

If NO, the process also proceeds to step S57, where it is determined whether a program for the correction G83 of the cutting tool has been input. If YES, the process proceeds to step S5.
8, the A-axis count number A and the stored count number B
Is made equal to A, for example, 1000, the correction value C is set to zero, and the routine proceeds to the main routine. Also in the case of NO, the process shifts to the main routine.

The operation is started in step S32.
In step S33, N = 0 is set. Step S34
At N1. In step S35, G of N1
Load function. That is, the wire feed amount is 25.0 mm, the pitch tool operation speed is F80 mm, and the forming tool operation speed is S50.
mm, wire feed speed V50mm, cutting tool operation speed W80mm, origin of pitch tool and forming tool =
0. In step S36, the process proceeds to a subroutine for X-axis movement amount calculation.

In step S61, it is determined whether or not G on the X axis is a correction number. In this case, since it is G0, the program storage data, that is, X0.0 is set to the target position in step S62 at NO, and the process proceeds to step S64. If YES, the target position = program storage data + correction value is calculated in step S63, but is not required for N1. In step S64, the target position-current position is calculated as the movement amount. However, since the current position is also 0 at the origin, the process moves to step S37 of the main routine at X0.0.

In step S37, the Y-axis movement amount is calculated in a subroutine. In step S61, it is determined whether the correction number is the Y-axis correction number. Since the answer is NO, the target position in step S62 is set to Y0.0, and in step S64, the movement amount is the same Y.
The routine moves to the main routine as 0.0. Step S3
At 8, the process proceeds to a sub-routine for calculating the Z-axis movement amount.
In step S61, it is determined whether or not G on the Z axis is a correction number, and the answer is NO. In step S62, the target position is set to the program storage data Z25.0, and in step S64, the current position is 0.0 and the moving amount Z is 25.0 mm. Transition.

The process proceeds to a subroutine for A-axis movement amount calculation,
In step S61, it is determined whether G is a correction number and NO
Therefore, in step S62, the process shifts to step S64 at the target position A0.0, and shifts to the main routine with the movement amount 0.0 at the current origin 0.0. In step S40, the four axes X, Y, Z and A are moved, but only the Z
Move 5.0 mm. In step S41, it is determined whether the movement is completed, and if NO, step S41 is repeated.
If the line feed 25.0 is completed, the end winding close contact portion of FIG. 3 is formed with YES.

In step S42, it is determined whether there is program data in the next N. Since there is data in N2, the process proceeds to step S34 with YES, and N = 2. Step S3
In step 5, the G function of N2, that is, G80 is read . Step S
At 36, the flow shifts to a subroutine for X-axis movement amount calculation. Although migrated target position to step S63 because the G of the X-axis is YES correction number or is judged G80 in step S61 is a program storage data X3.0 + correction value C, the correction value has not been entered 0 Therefore, the target position X3.0m
m. The process moves to step S64 and the movement amount is the target position X.
3.0—the current position but the current position is X0.0, so the movement amount is X3.0 mm, and the routine goes to step S37 of the main routine.

In step S37, the process proceeds to a subroutine for calculating the Y-axis movement amount. However, since it is not G81 in step S61, NO is determined, and in step S62, the target position is Y0.
0, the movement amount in step S64 is also Y at the current position Y0.0.
The routine proceeds to the main routine without change at 0.0. In step S38, the process proceeds to a subroutine for calculating the Z-axis movement amount, and in step S61, it is determined whether G is a correction number. Since it is NO, the target position is set in step S62, and the moving amount is set to Z50.0 in step S64, and the process shifts to the main routine.

In step S39, the process proceeds to the sub-routine for calculating the A-axis movement amount. In step S61, the determination of G is NO, so the target position is A0.0 . In step S64, the movement amount is the current position 0.0, A0. 0 , shift to the main routine. In step S40, four axes of X, Y, Z, and A are moved, and the movement of the pitch tool and the wire are sent out. Upon completion of the movement in step S41, it is determined whether there is program data in N following step S42 in the same manner as in the related art, and the process returns to step S34 to set N3.

In the following steps, only the different parts will be described, and the other steps are the same as those of N3 or the prior art, so the description will be omitted. In step S35, G81, Y0.3, Z10.0
Is read, and in step S36, the target value and the movement amount do not change from N2. The process proceeds to the sub routine in step S37.

The current position in step S64 in Y0.3 target value program storage data because it is 0 has not been inputted movement amount correction count in step S63 is YES because the step S61 in G81 is loaded 0 .0, the processing shifts to the main routine in which the movement amount is 0.3 mm. In step S38, the G number is determined again in step S61 of the subroutine, and since the determination is NO, the movement amount is 10.0 mm of the program storage value Z10.0. Become.

The flow shifts to the main routine, and there is no change from the previous time in step S39. In step S40, the robot moves four axes. Forming tool retracts 0.3mm and wire rod 10mm
Sent. The steps sequentially shift to N4 in step S34.
In step S35, G82 and Z300.0 are read.

Steps S36 and S37 The process proceeds to the subroutine at step S38 without any change, and step S6 is executed.
In step 1, since G is the correction number 82, the flow shifts to step S63 to set the program storage data Z300.0 + as the target position.
It is a correction value but the movement amount correction count has not been entered.
Since not 0, amount of movement at the current position 0 in step S64 becomes 300.0 mm. Move to the main routine and move four axes in step S40 without changing step S39 .
However, only the Z-axis wire feed of 300.00 mm is fed to form a coil body.

Steps are sequentially shifted, and N6 and N7 are the same as in the prior art.
When G83 and A30.0 are read in step S32, the subroutine proceeds to step S39, and in step S61, G is determined to be 83 YES as the correction number, and in step S63, the movement amount correction count number is not input for the target position. since complement positive value is 0 the program memory data A30.0. Since the current position is 0 in step S64, the process moves to the main routine as 30.0 mm. In step S40, only the A-axis cutting tool advances, and the spring is disconnected. Shift of step S41
If the completion is YES, the process shifts to step S42. Since it is not determined whether there is the next data, the process shifts to step S43.

The operation is continuously performed by repeating the above-described steps, and the pitch, the spring diameter, the free length, and the like are measured in the sampling inspection. From the measured values, for example, it is assumed that the correction amount of the pitch tool is X + 0.2, the correction amount of the forming tool is Y + 0.1, the wire feed amount is Z-10.0, the correction amount of the cutting tool is 0, and the movement amount correction count is set. The first count number of the set is 1000.

Turning the handle of the pulse generator 9A, X
Input 200 pulses as axis correction amount and count 12
00, the pulse handle 9B is turned to input 100 pulses as the Y-axis correction amount, and the count number is 1100. The pulse handle 9C is turned backward to input -100 pulses as the Z-axis correction amount, and the count number is 900. These figures A is assumed to be inputted to the molding program operation unit 3 4.

The stop signal in step S43 is NO not entered proceeds to Zaburuchin at step S44. In step S71, the storage number B of the correction count storage unit 41 is subtracted from the number A of the movement amount correction count unit 40 as a correction value. In this case, A is 1200 and B is 100
Since 0 difference is stored in the molding program operation unit 3 4 a correction amount as +0.2 200. In step S72, A is 1100, B is 1000, the difference is 100, and the correction amount +0.1 is similarly stored as the Y-axis correction value.

In step S73, A is 900 and B is 1000 as the Z-axis correction values, so that the difference is -100, and the correction value is stored as -10.0 mm. Step S
At 74, since the A-axis correction value has not been input, the value is set to zero, and the routine proceeds to the main routine, where the corrected spring forming process is executed. That is, the step N is set to 0, and the steps are sequentially moved. When the value of N1 is N2 as before without correction, the G function G80, X3.0,
Since Z50.0 is read, in step S36 X
The process proceeds to a subroutine for calculating the amount of movement of the axis, and step S61 is performed.
If YES in step G80, the flow advances to step S63 to add the correction value 0.2 to the program storage data X3.0 , thereby setting the target position X3.2. In step S64, since the movement amount is currently zero, it becomes the same 3.2 mm. Move to the main routine.

From step S37 to S39, X is moved by 3.2 and Z is moved by 50.0 in step S40 without changing from the previous time. The step shifts to N3, and the G functions G81, Y0.3, Z10.0 are read in step S35, and step S36 is the same as N2. In step S37, the process proceeds to a subroutine for calculating the Y-axis movement amount. Since it is G81 for correction in step S61, YES, a correction value 0.1 is added to the program storage data Y 0.3 in step S63, and the target position is set to 0.4.

Since the current value is Y0.0 in step S64, the movement amount is the same 0.4 mm. The process shifts to the main routine, and steps S38 and S39 are the same as the previous time, and are moved by Y0.4 and Z10.0 in step S40. The step shifts to N4, and G82, Z30 in step S35.
0.0 is read. Steps S36 and S37 are the same as before, and in step S38, the processing shifts to a sub-routine of the Z-axis movement amount calculation.

In step S61, G is corrected to 82 and YES.
To step S63. The correction value -10.0 is added to the program storage data Z300.0, and the target value becomes 290.0. Since the Z-axis is commanded incrementally in step S64, the current position is set to zero and 290.0 is set as the movement amount. Move to main routine and step S39
Moves the Z axis by 290.0 in step S40 without any change. The step shifts to N5, and the steps of the stroke end as before, and N6 and N7 shift to N8 without any change from the previous step.

In step S35, G function 83, A 30.0
Is read. The process proceeds to Step S36, Step S37, and Step S38 without change, and A
The process proceeds to a subroutine for calculating the axis movement amount. Step S6
Since G is 1 and YES is 83 in the correction, step S6
In step 3, a correction value is added to the program data A 30.0. However, since the correction count number A of the movement amount correction counting section 40 is 0, the correction value is 0, so the target position A30.0.

Since the current position is zero in step S64, the amount of movement is 30.0 mm, and the routine shifts to the main routine. In step S40, the cutting tool is moved 30.0 and the spring is cut. The step shifts to N9, and G0 and A0 are read in step S35, and sequentially shifts. In step S40, the cutting tool returns to the original state. Step S
The process proceeds from S42 to S43, and if the stop signal is NO, the continuous operation is repeated. If YES, the operation is stopped in step S45. If it is not necessary to perform all the corrections for the X-axis, Y-axis, Z-axis, and A-axis, it is of course possible to use a program that executes only a part of the correction.

[0055]

As described above, the present invention has the following effects. According to the measurement results of the sampled molded spring
When it is necessary to correct part or all of the coil diameter, spring free length, coil pitch, etc., turn the handle of the pulse generator and input a pulse equivalent to the correction value to correct when the forming spring is completed. Values can be calculated and program data can be input to the corresponding program correction position during continuous operation and can be corrected as appropriate. Therefore, the effects of wire rods, machine configuration, machine accuracy, temperature changes over time, etc. In addition, it can easily deal with diligently, can continuously produce products that fall within tolerances, and can prevent reduction in production efficiency due to shutdown, contributing to both improvement of efficiency and stabilization of quality Things. This method can be easily applied not only to a straight spring but also to a special spring such as a taper spring.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a tool and a wire drive system of an NC spring forming machine.

FIG. 2 is a control block configuration diagram for performing conventional automatic programming.

FIG. 3 is a diagram illustrating an example of a formed spring.

FIG. 4 is a diagram showing a main routine of a flow of a conventional spring forming.

FIG. 5 is a diagram showing a subroutine of a flow of X-, Y-, Z-, and A-axis movement amount calculation processing of the conventional spring forming.

FIG. 6 is a control block configuration diagram for performing automatic programming according to the present invention.

FIG. 7 is a diagram showing a main routine of a spring forming flow according to the present invention.

FIG. 8 is a diagram showing a subroutine of a flow of a correction initial setting process.

FIG. 9 is a diagram showing a subroutine of a flow of X, Y, Z, A axis movement amount calculation processing.

FIG. 10 is a diagram showing a subroutine of a flow of a correction value calculation process.

[Explanation of symbols]

Reference Signs List 31 keyboard 32 data input control unit 33 program storage unit 34 molding program calculation unit 35 movement amount storage unit 36 numerical data /
Pulse converters 39A, 39B, 39C, 39D Pulse generator 40 Movement amount correction count unit 41 Correction count storage unit

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B21F 3/06 B21F 35/00

Claims (2)

(57) [Claims] 1. A coil spring which performs NC control of all or a part of a wire rod feed, a forming tool, a pitch tool, and a cutting tool by a forming program created by a forming program operation section based on coil spring shape data and tool operation data. In a spring shape correction method in which a pulse generator of a correction amount input means, a movement amount correction count unit, and a correction count storage unit are added to a control unit of an NC spring forming machine for forming a shape, a pitch tool, a forming tool, and a wire rod feeder are operated prior to operation. , Enter the required movement correction code to the cutting tool, and extract and inspect the product during continuous molding.
Coil diameter of appropriately checked measured formed form spring by査, spring free length, corrected according to deformation such as coil pitch 必
A correction amount to be corrected when the main portion occurs entered the movement amount correction count unit by a pulse generator, a new you entered
The pulse count value (A) corresponding to the correction amount and the initial value of the movement amount correction count unit stored in the correction count storage unit or 1
The count value (B) before the molding cycle is
In forming the program operation unit in cut by calculating the A-B +, - determine the correction value (C), the corresponding movement amount correction code during molding in the middle turn this correction value for the next molding cycle (C) Program A spring shape correcting method for an NC spring forming machine, characterized in that the forming program is corrected in addition to the corresponding data of (1) and the spring forming is continuously performed based on the corrected forming program. 2. A wire which is sent out by NC control to a forming tool which is controlled in position by NC control on the front surface of the quill and advances and retreats is bent into a coil and formed into a predetermined pitch by a pitch tool whose position is controlled by NC control. And a keyboard for inputting necessary data and a correction code, a wire feed data, a spring shape data, and a tool operation input from the keyboard. A data control unit for creating required program data based on data and the like; a program data storage unit for storing program data created by the data control unit; shape data and tool operation data stored in the program data storage unit , Forming and storing a forming program based on wire feed data, etc. A forming program calculation unit for calculating a correction value based on the movement count correction count number of the tool, forming tool, wire rod, etc. and correcting the data of the forming program, and a moving amount of the pitch tool, forming tool, wire rod, etc.
A moving amount storage unit for storing , and a moving amount stored in the moving amount storage unit.
A numerical data / pulse converter for converting numerical data into pulses, a pulse generator for inputting correction-related data, counting the number of pulses input from the pulse generator, and outputting a count value to the molding program calculator. A movement amount correction count unit, and an initial value or 1 of the movement amount correction count unit.
Type stores the count value of the previous molding cycle and outputs the stored value to the forming program computing unit comprises a correction count storage unit, by the product sampling inspection during continuous molding
The coil diameter and spring of the formed spring measured and checked as appropriate
Correction points are required depending on deformations such as free length and coil pitch.
When it occurs, the correction amount to be corrected is transferred by the pulse generator.
The correction value is input to the moving amount correction count section, and a correction value is calculated at the break of the molding cycle of the spring during operation, and is calculated during the next molding cycle .
An NC spring forming machine with a spring shape correction function, wherein data is corrected in the inside .