JPS60223619A - Device for position control in bending work of member by high frequency induction heating - Google Patents

Abstract

PURPOSE:To elevate rapidly a work efficiency by setting to a device a member to be bend worked and by setting up automatically a motion command value of the device. CONSTITUTION:When a member 1 is clamped to a clamp stand 5 by a position control, the member 1 is fed out by a bend work starting command and an arm 2 starts to rotate. The rotation angle of this time is detected by counting the counting output of the 3rd pulse generator 10 by the counter of a counting part. A subtraction counter is used for this counter and when the counting output becomes zero YES output is fed out from a judging part. A bending work is finished by this YES output, the feeding of the member 1 is stopped and the rotation of the arm 2 is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a position control device for a bending member used in an apparatus that bends a pipe or the like by high-frequency induction heating.

[Conventional technology and problems]

Conventionally, Japanese Patent Publication No. 51-7472 discloses a method for bending pipes and the like using a high-frequency induction heating device.

The means for bending pipes, etc. according to this publication involves passing a fracture-bent member such as a pipe through an induction heating coil, fixing the coil, and supplying high-frequency power to the coil to bend the fracture-bent member. Heat to temperature. After that, the member is continuously bent along the trajectory of the arm that has been subjected to the fracture surface roughening process.

When using a high-frequency induction heating device to bend a fractured surface-processed member, such as a pipe, using the method described above, first, various setting values for driving the device are calculated in advance using a computer, etc. The value obtained as a result of the calculation was input into the setting section of the device, and the value was used as the operating command value of the device. As described above, in the past, in order to obtain the operation command value, the set value had to be calculated in advance by a computer, which significantly reduced work efficiency. In particular, when bending pipes with different diameters, it is necessary to calculate the value input into the setting section each time, which is extremely inefficient.

[Purpose of the invention]

This invention was made in view of the above circumstances, and by setting a workpiece to be machined in a machine, the machine's operation command value for that workpiece can be automatically set, thereby speeding up work efficiency. It is an object of the present invention to provide a position control device for bending a member by high-frequency induction heating.

[Summary of the invention]

In this invention, when the fractured surface beveled part is set in a predetermined position, the arm moves, and when it reaches a preset bending radius setting value, the arm is stopped, and this stop causes the fractured surfaced workpiece to be clamped. When it is clamped by the table and the clamping is finished, the fractured part is heated and the bending process of the fractured part is started, and when the preset bending angle and spring pack angle are reached. It is designed to stop the operation of the device.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 is a schematic plan view of the structure in which the fractured surface is a workpiece (hereinafter referred to as the member) set to a bending starting state, / is a member, and this member / is fed at a predetermined speed from the left side of the figure. It looks like this. , 2 is an arm movably disposed on a base 3, which is indicated by a dashed line in the figure, and a semicircular swivel base η is attached to the end of this arm 2. The armco is pivotally supported by the arm post 'ta at the stop point of the swivel base q. 3 is a clamp stand for clamping the end of the member/;
This clamp table 3 is movably placed on the arm λ. Reference numeral t denotes a first electric motor for moving the armco and the swivel table μ, and this electric motor t is attached to the end of the base 3. Reference numeral 7 denotes a second electric motor for moving the clamp table Jf, and this electric motor 7 is attached to the end of the arm λ. g is a first pulse generator for detecting the position of the arm post 'la attached to the end of the base 3. From the output of this first pulse generator 9 is a second pulse generator for detecting the position of the clamp base 5 attached to the end of the armco. 10 is a third pulse generator that detects the rotation angle of arm λ. // is a guide roller for member /; /λ is an induction heating coil; is supplied with electric power for heating the member/.

Fig. 2 is a block diagram of the control unit when bending a member/.In Fig. 2, 4/ is a member, for example, a pipe, the diameter of the pipe is 01, the radius is R1, the bending angle is θ, and the springback is This is a setting device for setting the value of the angle θ', and the value set by this setting device 2/ is supplied from the setting inter 7 ESUCO to the CPU λμ via the bus JJi. 5 is a counter section, and this counter section λj is formed of a counter JJa that counts the moving distance of the arm post 4tcL, a counter tacho 5b that counts the moving distance of the clamp base J, and a counter Jc that counts the rotation angle of the arm. There is. This counter part 5 has the first position detecting device shown in the above-mentioned south diagram 1. The output signals of the second pulse generator 1.9 and the third pulse generator 10 for rotation angle detection are supplied, and the counter IJa is subtracted by the output signal of the first pulse generator. The output signal of the third pulse generator 10 is used to subtract the counter 36, and the output signal of the third pulse generator 10 is used to subtract the counter 5C.

The output of this counter section λ3 is also supplied to the CPU μ via the bus 2J. 2g is ROM, this ROMx+vc
A group of instructions (programs) necessary for executing instructions of the CPU λμ is stored. .

27 is a storage unit necessary for the CPU λμ to execute instructions, and this RAM core is mainly used as temporary storage for executing instructions. This is a clock generation section that generates a timing clock for λ is a semi-fixed setting device interface which sends the calculated correction value set by the semi-fixed setting device 3- to the CPUJ4 in response to a request from the CPU q, and the following values are supplied to this interface.

(Distance K from the home position of the Inno arm post to the center of the pipe.

(0) Distance from the home position of the clamp base to the home position of the arm post 1IIK9 (HA) Deceleration position ML of the first electric motor that drives the arm post + (d) Deceleration position of the second electric motor that drives the clamp base.

, j10/1 display interface, the calculation results from this interface 30 CPU, 2tt are displayed on the CPU.
It is received according to the command of ra, and the following items are displayed on the display (not shown).

(a) Angle during bending (repipe diameter (c) Setting value of bending radius (d) Setting value of bending angle, ?/ is an interface for control signals, this interface, 3/ is Mll from CPUJ</) -CPU,
1μ command, and sends control signals to a sequence control section (not shown) as follows.

(b) Deceleration signal of the first electric motor B that drives the armco (stop signal (c) of the first electric motor B that drives the long arm, 2)
Deceleration of the second electric motor 7 that drives the clamp table 5 (d) Stop signal of the second electric motor 7 that drives the clamp table 5 (e) Stop signal of the bending process In FIG. 2, 33 is the sequence controller 1.3q. is an indicator.

Next, the operation of the above embodiment will be described. Fig. 1 is a diagram when the member/in other words, the pipe is clamped on the clamp stand S and the bending process is started, and normally the arm post μa
reaches the upper end of the base 3 in the drawing. Further, the clamp table J also reaches the upper end of the arm λ. This arrangement state is called the home position, and the outline of the groove formation is shown in FIG. In Figure 3, Hi /a arm position)
15 home position, this home position H1
This is when the ff arm post 'la is at the top of the base 3 shown in FIG. co is the center position of the member/eg pipe. In such a state, remove the parts/pieces from the counter stand 5.
In order to counter the position, the arm post 'laf is first moved from the home position H1 in FIG. 3 to the position of the bending radius R' on the left side in the figure.

In addition, in FIG. 3, K□ and 2 are constants specific to the machine.

The moving distance 111A#ff of the arm boss) 4g is calculated from the following equation.

A=R'-1-, however, R' is the bending radius set value R1, the bending angle set value, and the set value for the spring pack, as shown in Figure 4.R'=-x Rθ θ
Obtained from I.

Here, the moving distance A is obtained by operating the arm post tt6 as shown in chart 70 shown in FIG. That is, in FIG. 5, first, the arm post is moved forward by a command to start moving the arm post forward.

In FIG. 3, it moves to the left in the drawing. When the arm boss) ga moves, the count output from the first pulse generator is counted by the counter 2.5G of the counter section-5.

This counter 5α is a subtraction counter, and when the count output of this counter 5a becomes zero, a ``YESJ output'' is sent from the judgment section, and a movement stop command is given to the arm post lta. When defeated, arm boss until counter 5α becomes 0) '71
% movement continues. The above is the position control operation of the arm boss (lta).

Next, position control of the counter stand S will be described.

When the arm post tt6 is moved, the clamp stand 3 is moved at the same time, so the distance of the clamp stand 5 is as follows: D is the diameter of the vibrator, and D/bow is the value shown in FIG. The above B also has the sixth position similar to IIIA for moving the arm post μa.
Obtained by operating as shown in the flowchart in the figure. First, the clamp table 5 is moved forward by a command to start moving the clamp table 5 forward. As the clamp table 5 moves forward, the second
The count output from the pulse generator 9 is input to the counter section, /
It is counted by the counter Jb of 3. This counter j6
is a subtraction counter, and when the counting output of this counter 86 becomes zero, the judgment section sends out the ``YESJ output.'' This output gives a movement stop command to the lamp table 3. Pl when N UJ small output is sent
The movement of the clamp table 5 continues until the ot counter Sb becomes zero.

The above is the position control operation of the clamp table. In this way, by controlling the piece position, the member/(pipe) is
Once cranked (the state shown in FIG. 1), bending is performed according to chart 70 in FIG. In FIG. 7, the member 1 is sent out in response to a bending start command, and the armco starts rotating.

The rotation angle at (7') is the third pulse generator IO
The count output of is detected by the count of the counter 6c of the counter section 2.5. As this counter tjc, a subtraction counter is used in the same manner as described above, and when the count output becomes zero, a [YESJ output] is sent from the determination section.

This “YEsJ output” completes the bending process and
The feeding of the arm λ is stopped, and the rotation of the arm λ is stopped. The bending angle e is the sum of the bending angle setting value θ and the springback setting value θ'7, as shown in FIG. 4.

〔Effect of the invention〕

As described above, according to the present invention, the arm post position stop control means, the clamp table position stop control means, and the arm post rotation position stop control means are used to perform various control operations associated with bending of a workpiece to be bent. Commands can now be executed fully automatically, which has the effect of dramatically improving work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram in which the workpiece to be bent is set to a bending start state, Fig. 2 is a block diagram showing an embodiment of the present invention, and Fig. 3 is a schematic configuration diagram for describing the operation of the first diagram. Figure 4 is a diagram for explaining the bending angle, and Figure 5 shows $
FIG. 7 is a flowchart illustrating the entire operation of FIG. 2. /...Part to be bent, β...Arm, <ta...
・Arm post, j...clamp base, δ, ri,/・fu...1st to 3rd pulse generator, ko/...setting device, koq...CPU, 2.3.・Counter section,
Not: ROM, Core: RAM, No: Clock generator. Figure 2 24 Jomachi on the drawing (*no changes made to the content). Fig. 3 Fig. 4 Fig. 5 Fig. 6 1972'181')V)l Commissioner of the Japan Patent Office 1, Display of the case 1982 Patent Application No. 79288 2, Title of the invention 3, Person making the amendment Case Relationship with Applicant Sudo Electric Manufacturing Co., Ltd. 4, Agent Address: 1-29 Akashi-cho, Chuo-ku, Tokyo, 104, Japan Likusaikai Pill Date of July 81, 1981 7 Contents of Amendment (1) Drawings Figures 8 and 7 Correct Figure 4 as shown in the attached sheet. (2) Amend the document certifying the power of attorney as shown in the attached sheet. that's all

Claims (1)

[Claims] (1) It has an arm that is movable on the base, an arm post that holds this arm horizontally and allows the arm to move and rotate freely, and a movable arm that clamps the workpiece to be bent on this arm. A lamp stand is provided, the member is fixed to the clamp stand, and the member is fed by a device while being heated by high-frequency induction heating, and the bending stress is concentrated on the heated part and the arm is rotated around the arm post rack. Control device for bending a component +1 In a continuous hot bending device for components using high-frequency induction heating, the control device controls the diameter of the component to be bent, the bending radius and angle of the component, and the springback after the bending process is completed. a setting section for setting an angle; an arm post position stop control means for moving the arm post when the bent workpiece is set at a predetermined position and stopping the arm post If when the bending radius setting value is reached; a clamping table position stop control means for moving the clamping table of the member on the arm post and stopping the movement of the clamping table when a set value of the diameter of the member is reached; and an arm post rotation position control means for completely stopping rotation of the arm post when the rotation of the arm is started and the bending angle setting value set in the setting section is reached. Position control device for bending parts using high-frequency induction heating.