KR20150092069A - Tube expanding machine - Google Patents

Abstract

The purpose of the present invention is to provide a tube expanding device capable of guaranteeing a high tube expanding quality by grasping the working conditions when expanding a tube, and expanding the tube with high reliability. The tube expanding device (1) comprises a driving device rotating a tube expander (100) being mounted using a servomotor (25); and a controller (3) controlling an operation of the driving device, expanding the tube by inserting the tube expander (100) into the tube (T). The controller (3) comprises: a torque calculating means (5) calculating a torque based on a value of a current flowing in the servomotor (25); a displaying means (6) displaying the tube-expansion torque while expanding the tube; and a preset target torque indicating the completion of the tube expansion. In addition, the controller (3) shows the tube-expansion torque using a graph of a time axis and overlaps a level mark (64c1) of the target torque on the graph.

Description

{TUBE EXPANDING MACHINE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube expanding apparatus, and more particularly to a tube expanding apparatus for displaying an expanding torque during a dilation operation and a predetermined target torque on display means.

In the assembling work of the heat exchanger, the tube expander used when joining the tube (tube) and the tube plate requires a driving device for rotating the mandrel and a controller for operating the driving device. Various motors are appropriately selected for the driving source of the driving apparatus and the expansion operation such as ON / OFF of the motor, forward rotation and reverse rotation, rotation time of the motor, and number of tube expansion are managed by the controller (for example, , Patent Documents 1 to 3).

In the expansion work described in Patent Document 1, the torque sensor 16b detects the torque value applied to the output shaft of the motor, and when it is determined by the CPU 17a that the torque value has reached the preset torque value, The motor 16 is stopped. The CPU 17a compares the torque value when the servomotor 16 is stopped with the value of the preset upper / lower limit value T2. When the torque value exceeds the upper / lower limit value, In this case, it is judged as NG, and the amount of displacement is indicated on the display unit to warn, and if the torque value is within the upper / lower limit value, it is determined that the torque value is appropriate and the control operation ends.

In the expansion work described in Patent Document 2, the expansion torque of the roller is detected by the relative displacement of the feed nut relative to the frame when the torque reaches the set torque, so that the expansion torque is mechanically detected and the expansion operation is appropriately performed.

The expansion work described in Patent Document 3 manages the expansion work by controlling the rotation speed of the electric motor to a predetermined current value by rotating the electric motor at a low speed in a constant low voltage state and also controlling the expansion operation when the output current exceeds the threshold value And the control unit blocks the current to prevent the overcurrent.

Japanese Patent Application Laid-Open No. 7-290171 (paragraphs 0028 to 003, Figs. 3 and 4) Japanese Unexamined Patent Publication No. 1-143632 ([Functioning on page 6]) Japanese Patent No. 3977657 (paragraphs 0008 to 0012, 0033, 0034)

However, in the expanding work described in Patent Document 1, since the servomotor is stopped when the torque value at the time of widening reaches a preset torque value, it is possible to know how the torque value (maximum torque value) There is a problem in that it is not possible to guarantee an appropriate expansion quality only by the maximum torque value.

Further, in the expanding work described in Patent Documents 1 to 3, since the operator can not grasp the expanded torque and the target torque during the expanding operation, even if it is possible to recognize that the expanding operation is abnormal, There is a problem that it can not be easily interpreted whether or not it has occurred.

Further, even when the control operation is appropriately terminated due to the expansion torque reaching the target torque, there is a problem in that it is not possible to objectively assure that the expansion work has been carried out appropriately because the operation data of the expansion work is not recorded.

SUMMARY OF THE INVENTION The present invention has been made in view of such background, and it is an object of the present invention to provide a tube expanding apparatus capable of precisely grasping a work state at the time of expansion and performing an expanding work with a high reliability.

According to an aspect of the present invention, there is provided a tube expander having a drive device for rotationally driving a tube expander to be mounted by a motor, and a controller for controlling operation of the drive device, Wherein the controller includes torque calculating means for calculating an expanding torque from a current value flowing in the motor, and a display for displaying an enlarging torque during the expanding operation or a target torque indicative of completion of expansion, And means for controlling the operation of the apparatus. The enrichment torque during the expansion operation includes the expansion torque at the start of the expansion operation, the maximum value of the expansion torque during the expansion operation, and the value of the operation amount until the maximum value of the expansion torque during the expansion operation is reached. Then, the controller controls the motor in accordance with a predetermined value of the expansion torque during the expansion operation.

The present invention calculates the torque (expansion torque) generated from the current value flowing in the motor, so that it is possible to grasp not only the maximum value of the enriching torque during the expansion operation but also the elapsed time until reaching the maximum value. It can be grasped and managed accurately.

Further, by displaying the expanded torque and the target torque by the display means, the worker can confirm the expanded torque and the target torque in comparison with each other, so that it is possible to grasp visually the completion of the proper expansion work.

Thus, according to the present invention, it is possible to reliably confirm that the expansion work has been carried out properly by appropriately grasping the work state at the time of expansion.

According to the present invention, the controller is characterized in that the display means displays the expanded torque in a graph on a time axis, and the level indication of the target torque is superimposed and displayed.

According to this configuration, since the tube expanding apparatus according to the present invention can visually compose the expanded torque and the target torque in the graph on the time axis by the display means, Can be visually easily grasped and managed. Therefore, it is possible to more surely confirm the quality of the enlargement by confirming that the proper enlargement work has been completed more accurately.

In the present invention, the controller displays the rotational speed of the servomotor on the display means in the form of a graph on the time axis and superimposes the graph on the time axis graph of the magnified torque.

According to this configuration, since the tube expanding device according to the present invention can visually compose the expansion torque and the rotation speed on the graph of the time axis by the display means, it is possible to visually easily grasp the expansion torque and the rotation speed during the expansion operation, can do.

According to the present invention, the controller is provided with a work recording means for recording the expansion torque and the rotation speed.

According to this configuration, the tube expanding apparatus according to the present invention can record the content of the expanding operation by the job recording means, thereby making it possible to present the work record in writing, and therefore it is possible to sufficiently guarantee that the proper enlarging operation is completed .

According to the present invention, the display means is an input display means capable of inputting a touch panel, and the input display means sets the rotational speed of the motor and the target torque during the expansion work to be set in advance, The speed ratio is set to be higher than the speed change torque, and the speed is set to decelerate from RPM before shifting to RPM after shifting.

According to such a configuration, the tube expanding apparatus according to the present invention allows the operator to input the rotation speed, the target torque, and the shift torque at the time of widening by simply operating the touch panel by numerical value It is possible to manage the contents of the expanding work with numerical value by operation. Further, when the controller reaches the target torque, the controller can automatically manage the motor when the rotation of the motor is stopped. In addition, the controller can control the rotational speed by two rotational speed indexes "at the time of completion of the expansion" and "at the time of completion of the expansion", or at the rotational speed "shift (until the torque value reaches the transmission torque value Quot; reverse " before " deceleration " before " deceleration ") and after the torque value reaches the transmission torque value . ≪ / RTI >

According to the present invention, the controller displays on the display means the number of times the expansion work is expanded.

According to this configuration, since the tube expansions according to the present invention can display the number of expansions on the display means in comparison with the number of expansions and the contents of the expansions, it is also possible to assure that the expansions are properly completed for each expansions .

According to the present invention, the controller displays the replacement time of consumable parts consumed in accordance with the number of times of expansion in the display means.

According to such a configuration, the tube expanding apparatus according to the present invention can accurately grasp the replacement timing of consumable parts, and can guarantee a uniform expanding quality.

INDUSTRIAL APPLICABILITY The present invention can provide a tube expanding apparatus capable of reliably grasping an operation state at the time of expansion and appropriately expanding the work, and reliably ensuring that the expanding work has been carried out properly.

1 is a perspective view showing a state in which the tube expanding apparatus according to the embodiment of the present invention is mounted on a stand, Fig. 1 (b) is a perspective view showing a state in the expanding operation, , and (c) are cross-sectional views showing a state of enlarging.
2 is a front view showing the appearance of major components of the tube expanding apparatus according to the embodiment of the present invention.
3 is a front view showing an automatic operation display screen of the touch panel of the tube expanding apparatus according to the embodiment of the present invention.
4 is a front view showing a tool counter display screen of a touch panel of a tube expanding apparatus according to an embodiment of the present invention.
5 is a front view showing a graph display screen of the touch panel of the tube expanding apparatus according to the embodiment of the present invention.
6 is a flowchart showing the operation of the tube expanding apparatus according to the embodiment of the present invention.
7 is a front view showing another graph display screen of the touch panel of the tube expanding apparatus according to the embodiment of the present invention.

A tube expanding apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings as appropriate.

1, the tube expanding apparatus 1 is a device for driving a tube expander 100 (see Fig. 1 (c)) which is an expanding tool mounted on a distal end portion, and a worker M ) And a stand type expansion device 110 (also referred to as a stand type expansion device) 110 (see FIG. 1) in which the load of the worker M is reduced by movably supporting the movable expansion device (not shown) 1 (a)).

1A and 1B, the stand type expansion device 110 includes a stand 111 for movably supporting the tube expanding device 1 in the up-and-down and left-right directions, The load M is prevented from being applied to the worker M (see FIG. 1 (B)) by gravitational force during the expanding operation and the reaction force at the time of rotation driving, thereby reducing the burden and also achieving a high degree of accuracy and uniform expansion It is possible.

2, the tube expanding apparatus 1 includes a main body 2 for mounting the tube expander 100 (see Fig. 1 (c)), a stand 111 (see Fig. 1 And a controller 3 for controlling the operation of the main body part 2. [

1, the tube expander 1 is driven in a state in which the tube expander 100 attached to the tip end portion is inserted into the tube T (see Fig. 1 (b)), and the tube T (Refer to FIG. 1 (c)). Since the tube T can be securely fixed with good workability, it is widely used for fixing the tube T of the heat exchanger and the like do.

1 (c), the tube expander 100 includes a tapered mandrel 101 whose tip end is reduced in diameter, a frame 102 rotatably inserted into the mandrel 101, And a plurality of rollers 103 rotatably embedded along the circumferential direction of the roller 102.

The tube expander 100 is an optional expansion tool used by being attached to a tube expanding apparatus 1 (see FIG. 2) by an unillustrated accessory, and being suitably exchanged according to purposes and applications Quot; expansion tool " or simply " tool ").

The tube expander 100 is rotated by revolving the mandrel 101 by means of the tube expanding apparatus 1 (see Fig. 2) while the plurality of rollers 103 revolve around the mandrel 101.

1 (b)), the operator M (see Fig. 1 (b)) inserts the distal end portion of the mandrel 101 into the tube T The plurality of rollers 103 are moved in the axial direction along the taper of the mandrel 101 and the outer circumferential circle formed by the plurality of rollers 103 surrounding the mandrel 101 And moves in the radial direction to expand the diameter. In this way, the roller 103 revolves around the mandrel 101 while revolving around the mandrel 101 to enhance the tube T.

On the other hand, after the completion of the expansion, when the tube 103 is reversely rotated by the tube expanding apparatus 1 (see Fig. 2), the roller 103 moves in the axial direction along the taper of the mandrel 101 and is reduced in diameter while returning.

In this manner, the tube expander 100 performs the expansion operation by rotating the mandrel 101 in the normal direction by the tube expanding apparatus 1 (specifically, the servomotor 25 described later), and reversing the operation.

The tube expander 100 is roughly classified into a parallel diffusing tube and a flared tube diffusing tube depending on the shape of an end of the tube T which is to be expanded. There are various types according to the use such as the diameter of the tube to be expanded and the number of the rollers 103 , The conditions of expansion, the tool life, and the like are also different.

2, the main body 2 of the tube expanding apparatus 1 includes a rotation drive unit 21 to which the tube expander 100 (see FIG. 1 (c)) is connected, a worker M A universal joint portion 23 connecting the telescopic hand 22 and the rotation drive portion 21 and a stand 111 (see Fig. 1 (a)) ), And a servomotor 25 serving as a driving device for rotating the rotation driving unit 21. The bracket 24 is provided with a bracket 24,

The rotary drive unit 21 is a portion to which the mandrel 101 (see Fig. 1 (c)) of the tube expander 100 (see Fig. 1 (c)) is integrally connected.

The rotary drive unit 21 and the mandrel 101 integrally connect the shank 101a formed at the root portion of the mandrel 101 to the rotary drive unit 21 by an unillustrated accessory and replace the various tube expanders 100 So that it can be fixed as much as possible.

The telescopic hand 22 is a cylindrical member whose length in the axial direction is adjustable, and a rotation shaft (not shown) for rotating the rotation driving part 21 is inserted into the telescopic hand 22.

The universal joint portion 23 is a portion for changing the angle freely and transmitting the torque, and is equipped with a rubber cup 23a covering the rotating portion.

The bracket 24 is L-shaped as viewed from the front, and the telescopic hand 22 and the servomotor 25 are fixed with one side 24a extending in the vertical direction therebetween. And the other horizontal side 24b having an L shape can be detachably fixed to the stand 111 (see Fig. 1 (a)).

The servomotor 25 can be of various types such as a DC servomotor or an AC servomotor. By employing the servomotor 25, however, the rotational speed and torque can be suitably adjusted .

The controller 3 includes a foot switch 4 for incorporating a semiconductor circuit and stopping the operation of the servomotor 25, a torque calculating means 5 for calculating a torque from the current value flowing through the servomotor 25, A touch panel 6 as a display means for displaying a target torque indicative of the completion of the expansion work and a magnification torque during expansion work and a work recording means 8 for recording work data such as an expansion torque in the expansion work And controls the electric power supplied from the main power source AC to give the servo motor 25 an appropriate rotation speed to generate torque.

The controller 3 includes a power supply cable 31 to which power of the main power source AC is supplied, a main power breaker (not shown) arranged on the side, an operation preparation button 32 to be ready for operation, An operation mode changeover switch 33 for switching between forward rotation and reverse rotation of the vehicle, and manual operation for rotating only in a single direction of forward rotation or reverse rotation, a reset button 34 for resetting the generated error, The emergency stop button 36, the motor power cable 37, and the encoder cable 38, which are not particularly limited, and are not particularly limited, Is omitted.

The foot switch 4 is a switch operated by the operator M (see Fig. 1 (b)) and supplying power from the controller 3 to the servomotor 25. Once the servo motor 25 is stepped on, the servomotor 25 rotates forward and performs the expanding operation repeatedly.

The torque calculating means 5 is means for calculating the torque generated by the servo motor 25 based on the current value detected by a current sensor (not shown) for measuring the current value flowing through the servomotor 25. [ According to this configuration, by using the servomotor 25, it is possible to detect the bidirectional expanding torque of the forward rotation at the time of expansion and the reverse rotation at the time of the backward rotation. Therefore, as compared with the case of using, for example, a three-phase induction motor as the driving device, there is no need to place a gear box (not shown) for driving the reverse rotation between the driving device and the telescopic hand 22, It is possible to reduce the weight and size.

As shown in Fig. 3, the touch panel 6 can switch various display screens by touching the display screen switching bar 61 (see Figs. 4 and 5) at the lower end of the display screen displayed during operation have. The display screen switching bar 61 is provided with an [Automatic operation] 62a for displaying the automatic operation display screen 62 and a [Tool counter] for displaying the tool counter display screen 63 An input / output monitor 65a for displaying an input / output monitor display screen (not shown), and an abnormal display screen (not shown) (Abnormal display) 66a is displayed on the display screen.

≪ Automatic operation display screen (Fig. 3)

The automatic operation display screen 62 can be displayed by touching the touch area of the [Automatic operation] 62a of the display screen changeover bar 61 and the area of the [Automatic operation] 62a is selected It is divided into colors.

The automatic operation display screen 62 displays a title [Automatic Operation] on the upper left of the screen, and displays the operation date and time display portion 62b displayed on the upper right corner of the screen, the operation status provided below the operation date display portion 62b An expansion number display section 62d for displaying the number of expansion times [150] and the preset value [100000], and an expansion time display section 62e for displaying the respective process times during the expansion work , A rotation speed display portion 62f, and a torque display portion 62g.

The operation date / time display section 62b is an area for displaying the current date and time (job date and time), and can record the date and time by the controller 3 (see Fig. 2) It is possible to manage together with the date and time whether the expansion work has been performed. Therefore, the contents of the expansion work can be easily understood and the quality of the expansion can be properly ensured.

The work content display section 62c displays the type [A] of the tube expander 100 (see FIG. 1 (c)) as a tool and the name of the tube expander [A] [Operation mode] indicating the distinction between the automatic operation [AUTO] and the manual operation [MANU (not shown)] and the servo motor 25 (see Fig. 2) [Direction of rotation] indicating whether forward rotation is in progress [CW] or reverse rotation [CCW], and [Rotation direction] in which each state is displayed by turning on the lamp, CW], [CCW], [Expansion completed], and [Abnormal]. Although not shown in Fig. 3, the graph indicating the recording status may be lit, or the recording status of the recording medium and the recording folder name may be displayed.

In addition, four types of tools [A], [B], [C] and [D] can be registered in advance on the display section of the [Tool]

The number of tubes T (see Fig. 1 (b)) to be expanded by the operator M is registered in the [preset value] of the expansion number display section 62d, and the [number of expansion times] The controller 3 counts the number of times that the operation is normally completed, and the number of the tubes T for which the expansion work is completed normally is displayed. The controller 3 counts the number of times that the expansion operation in the automatic operation mode is normally completed when the buzzer 35 for notifying occurrence of the abnormality is not operated and the expansion operation is completed.

With this configuration, the worker M can easily grasp the progress status of the expanding operation, and when the abnormality has occurred, it is possible to grasp how many times the expanding process has occurred.

The widening time display section 62e displays the widening time for enlarging and expanding the servomotor 25 (see Fig. 2) by normal rotation, the wobbling time for performing the wobbling operation by rotating the servomotor 25 in the reverse direction, Is the interval time which is the interval time for stopping the servomotor until the next expansion operation is performed after the elapsed time and the total time [TOTAL] of the expansion time and the return time. [Bounce time] and [Interval] are displayed together with [Bounce time set value] and [Interval set value] set by the operator (M), respectively, while the expanded time, interval and return time are displayed .

With this configuration, the worker M can confirm that the proper enlargement work has been performed by comparing the predetermined set value with the execution value of the actually performed work.

The rotation speed display portion 62f is an area for displaying the rotation speed of the servomotor 25 (see Fig. 2). The rotation speed display portion 62f displays the set value in the expansion operation (expansion rpm setting 300) (Current RPM 300) and the rotation speed level meter 62f1 that are the current rotation speed during operation are displayed.

The set values at the time of the expanding operation are set to be "high RPM until the outer circumferential surface of the tube makes contact with the inner circumferential surface of the pipe plate hole, and at a low speed after contacting the inner circumferential surface of the pipe plate hole, &Quot; and " RPM setting after shifting " may be set. By doing so, the amount of spring back of the tube and the plate hole can be stabilized, and the improvement of the tube diameter accuracy can be expected.

[Current RPM (300)] is a value obtained by appropriately averaging the current value flowing through the servo motor (25) and calculating the rotation speed.

The rotational speed level meter 62f1 is plotted against the current RPM (indicated by the position 300 in the figure) with respect to the level (indicated by the position 300 in the drawing) indicating the set value at the time of the expansion operation. With this configuration, the worker M can compare the set value at the time of the expanding operation with the present RPM at a glance, so that it can be easily confirmed that the expansion has been carried out at an appropriate rotation speed.

The torque display portion 62g is an area for displaying the torque of the servomotor 25 (see Fig. 2) and is a target torque in the expanding operation (the set torque 100.0) and the current torque during operation (Current torque 75.6) and the torque level meter 62g1 are displayed.

The set torque 100.0 is a target torque for switching the reverse rotation in the normal rotation and the return operation in the expanding operation of the servo motor 25. [ [Current torque (75.6)] is a value obtained by appropriately averaging the current value flowing through the servomotor 25 and calculating the torque.

With this configuration, the operator M can compare the target torque (set torque) at the time of the expanding operation with the current torque at a glance, so that it can be easily confirmed that the expansion has been performed with an appropriate expansion torque.

The [set torque], which is the target torque in the expanding operation, is set to the two torque settings [shift torque] at the time of decelerating the rotation speed in the middle of the expansion operation and [ Value.

≪ Tool counter display screen (Fig. 4)

The tool counter display screen 63 displays a title [Tool Counter] at the upper left of the screen, displays a work date and time display portion 63b displayed on the upper right corner of the screen, and a display portion 63C, a display section 63d for displaying the number of times of expansion of the tool B, and a touch region (tool C, D) for displaying the tool C and the tool D instead of the tool A and tool B of the current screen, D] 63e.

(Not shown) when the tool C and the tool D are displayed by touching the display portion 63c of the tool A, the display portion 63d of the tool B, and the tool C, D 63e, The display portion 63d of [Tool B] will be described, and detailed descriptions of other display portions 63c and the like will be omitted.

[Tool B] can be selected by touching [Select] provided on the display portion 63d of [Tool B], and the display lamp 63d1 arranged next to [Tool B] lights up.

In the display portion 63d of the tool B, the name [CB-217 OD19 * T1.2] of the tube expander [B] and the expendable parts [roller], [mandrel] [Frame] is displayed.

On the display section of [roller], the number of times of expansion [500] is displayed on the bottom, and the number of times of replacement when the number of times of replacement is changed, and the current number of times of expansion [11] is displayed on the top. The setting of the number of times of expansion of the lower stage is performed when the operator M touches the area where the number of times [500] is displayed, and ten keys (not shown) are displayed, so that an arbitrary number of times can be set. In addition, the current number of times of enrichment [11] at the upper end counts the number of times the controller 3 (see Fig. 2) completes the enriching operation normally in the automatic operation mode and displays it. The same is true for the display portions of [mandrel] and [frame].

In the present embodiment, the replacement time of consumable parts such as the roller 103 (see Fig. 1 (c)) is notified to the operator by displaying the number of times of expansion, but the present invention is not limited to this. The lamp may be turned on or the buzzer may be turned on.

≪ Graph display screen 64 (Fig. 5) >

Fig. 5 shows a graph display screen 64 of the expanding operation using the tool A in Fig. The graph display screen 64 includes a current data display portion 64b displaying a title [Graph Display] at the upper left of this screen and displaying the current date and time, the rotational speed and the enriching torque, And a graph display section 64c for displaying the graphs.

The present data display section 64b displays the current date and time during the expansion operation and the rotation speed [0] and the rotation torque [0.0] of the servomotor 25 (see Fig. 2) during the expansion operation. 5 shows the state in which the servomotor 25 is stopped after the expansion operation is completed correctly. However, during the expansion work, the rotation speed display portion 62f read from the encoder of the servo motor 25 (Current RPM) (see Fig. 3) is displayed.

The graph display section 64c displays the magnitude of the magnitude of the magnitude of the magnitude of the magnitude of the magnitude of the magnitude of the magnitude of the magnitude of the magnitude of the magnitude And a level display 64c1 in which the target torque [100 N · m] is indicated by a horizontal line are superimposed on each other. In the graph display section 64c, since the worker M displays the right end of the present value graph (indicated by t7) touched by the [graph display] 64a, the graph drawn when the time progresses moves to the left Is displayed. Since the rotation speed is displayed as an absolute value and is displayed in the same direction whether it is in the forward rotation or the reverse rotation, the rotation is stopped (t3 to t4) after the forward rotation (t1 to t3) and reverse rotation (t4 to t6) And visibility is good.

The operator M can visually check the expanded torque indicated by the solid line P and the target torque [100 N · m] graphically by referring to the graph display unit 64c. Thus, the worker M visually confirms that the proper expansion work has been completed, We can assure you with confidence.

More specifically, referring to the graph display section 64c, the operator M starts rotating (forward rotation) the servomotor 25 (see FIG. 2) at time t1 and the rotational speed indicated by the broken line S (See Fig. 1 (c)) abuts against the tube T, and the expansion torque at this time is about 38 N · m, which can be read from the graph have.

Then, the enriching torque gradually increases, and the rotation speed of the servomotor 25 starts to decelerate (time t2) immediately before the expanded torque reaches 100 N · m, and the expanded torque reaches the target torque [100 N · m] The servomotor 25 is stopped (at time t3) so as not to exceed a great extent, and the enrichment torque also rapidly decreases, and the expansion operation is ended (time t4). The worker M can visually recognize that the completion of such an expansion work is equal to the horizontal line of the level indication 64c1 of the target torque [100 N · m] and the solid line P of the expanded torque.

Further, after the servomotor 25 stops forward rotation (time t3), the worker M starts the return operation (time t4) and passes the peak of the torque during the return operation (time t5) It is possible to grasp that the operation is completed while returning while maintaining 300 rpm and the servo motor 25 is stopped.

7, the controller 3 determines that the rotational speed (indicated by the broken line S) of the servomotor 25 is equal to or higher than the speed change speed And may be set to decelerate from RPM before shifting to RPM after shifting (time t2 to time t3 in Fig. 7, S7 'in Fig. 6). As a result, an improvement in the tube diameter accuracy can be expected.

The work recording means 8 (see Fig. 2) is made up of a storage device (for example, an SD card or the like) and stores the enlargement time in the expanding operation, the return time (reverse reverse rotation time), the expansion torque, Rotation speed, and various other types of job data, and may be displayed on a screen or output from a printer (not shown).

Therefore, the worker M can improve the quality of expansion by referring to the work data in the expansion work, and can objectively assure the quality of the expansion by attaching various work data to the work to be expanded (work).

The operation of the tube expanding apparatus 1 according to the present embodiment configured as above will be described mainly with reference to Figs. 1, 2, and 6. Fig.

The operator M (see Fig. 1 (b)) mounts the tube expander 100 on the rotary drive part 21 (see Fig. 2) provided at the tip of the main body part 2 of the tube expanding device 1, And prepare for enlargement work (see S1 in Fig. 6).

The operator M inserts a main power breaker (not shown) on the side of the controller 3 (refer to S2 in Fig. 6), and the automatic operation display screen 62 of the touch panel 6 The time display section 62e sets the return time set value 5.0 and the interval set value 4.0 and sets the revolving speed RPM setting 300 and the return RPM setting 300 by the rotational speed display section 62f, And the torque display section 62g inputs the set torque 100.0 (see S3 in Fig. 6), which is the target torque for switching between forward rotation and reverse rotation.

If a plurality of programs are registered in advance in such a condition setting, it is possible to set them automatically only by selecting the program No. (refer to S4 in Fig. 6).

The operator M presses the operation preparation button 32 (see Fig. 2) of the controller 3 to make the operation ready state (refer to S5 in Fig. 6) and presses the foot switch 4 (See Fig. 6, S6) by driving the rotary drive section 21 (see Fig. 2) at the rotational speed at the time of widening and starting the expansion operation (expansion operation).

The controller 3 (see Fig. 2) appropriately averages the current flowing through the servomotor 25 at the time of widening by the torque calculating means 5, and then calculates a torque (expansion torque) (See the t3 of Fig. 5 and S7 of Fig. 6) when the worker M reaches the target torque set in advance (set torque 100Nm, see the torque display portion 62g of Fig. 3).

In S3, when the target torque and the shift torque are set, the rotational speed is shifted to RPM after shifting (S7 'in Fig. 6) when the expanded torque calculated by the torque calculating means 5 reaches the shift torque. . Thereafter, when the target torque is reached, the rotation is stopped.

2) of the rotation speed display portion 62f of FIG. 3 (see FIG. 3) after the forward rotation of the servomotor 25 is stopped and the rotation speed 300RPM at the return operation set by the operator M (Refer to the [return time set value 5.0] in Fig. 3) set by the operator M in the expanded time display section 62e of the touch panel 6 is elapsed , The rotation is stopped and the buzzer 35 (see FIG. 2) for completion of expansion is sounded (see S8 in FIG. 6).

3) of the operator 3 (see FIG. 2) set by the operator M by the enlargement time display section 62e of the touch panel 6 after completion of the expansion, 6), the servomotor 25 (see Fig. 2) is rotated forward to start the next expanding operation (see S9 in Fig. 6), and the expanding operation is performed consecutively as many times as the number of the expanding tubes T (See S10 in Fig. 6, returning from S10 to S6 in Fig. 6), and when the foot switch 4 is depressed, the expanding operation is stopped and terminated (see S11 in Fig. 6).

The tube expanding apparatus 1 according to the embodiment of the present invention calculates the torque (expansion torque) generated from the current value flowing in the servomotor 25 so as to be larger than the maximum value of the expansion torque during the expansion work, It is possible to accurately grasp and manage the operation state at the time of expansion.

Further, by displaying the relationship between the expanded torque, the target torque and the rotation speed on the graph display screen 64 by the touch panel 6, the operator M visually contrasts the relationship between the expanded torque, the target torque and the rotation speed It can be confirmed at a glance that the proper expansion work has been completed.

For this reason, the tube expanding apparatus 1 according to the embodiment of the present invention can reliably grasp the working state at the time of spreading, perform the appropriate expanding work, and can surely ensure that the expanding work has been properly performed.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, but can be appropriately modified and carried out.

For example, in the present embodiment, the relationship between the expanded torque, the target torque, and the rotational speed is displayed on the graph display screen 64 by the touch panel 6, but the present invention is not limited to this, Or only the enlarged torque during the expanding operation may be displayed.

1 tube expansion device
2 body portion
3 controller
4 Footswitches
5 torque calculating means
6 touch panel (display means, input display means)
8 Work recording means
21 rotation drive
22 Telescopic Hand
23 Universal joint part
24 bracket
25 Servo motor (drive unit)
31 Power cable
32 Operation ready button
33 Operation mode changeover switch
34 Reset Button
35 buzzer
36 Emergency stop button
62 Automatic Operation Display Screen
63 Tool Counter Display Screen
64 Graph Display Screen
T tube
TB tube

Claims (6)

A tube expanding apparatus having a drive device for rotationally driving a tube expander to be mounted by a servomotor and a controller for controlling operation of the drive device and performing the expanding operation by inserting the tube expander into a tube,
The controller includes torque calculating means for calculating a torque generated by the servomotor based on a current value detected by a current sensor for measuring a current flowing through the servomotor,
And display means for displaying the magnification torque during the magnification operation or the magnification torque during the magnification operation and the target torque indicating the completion of the expansion,
Wherein the torque calculating means calculates the expansion torque by appropriately averaging the current flowing through the servomotor at the time of expansion,
Wherein the control means sets the control means to decelerate the rotation speed of the servo motor immediately before the expanded torque reaches the target torque so as to stop the servo motor so that the expanded torque does not significantly exceed the target torque. Device. The display device according to claim 1, wherein the display means is an input display means capable of inputting a touch panel,
The input display means sets the target torque and the shift torque in advance,
Wherein the controller stops rotation when the rotational speed of the servo motor is shifted to RPM after shifting and then reaches the target torque when the expansion torque reaches the shift torque. The controller according to claim 1 or 2, wherein the controller is controlled by two rotation speed indexes at the time of "completion of expansion" and "at the time of completion of expansion", or until the torque value reaches the transmission torque value (Deceleration) after the torque value reaches the transmission torque value, and the " reverse " time 3 after the torque value reaches the target torque and the expansion is completed Wherein the control means controls the rotation speed of the tube by the rotation speed index. The servo control apparatus according to any one of claims 1 to 4, further comprising: a return time for performing a return operation by reversing the servo motor by the input display means; and a stop time for stopping the servo motor Wherein the time interval setting unit sets the interval time to be set. 3. The control system according to claim 1 or 2, wherein the controller displays a graph display screen in which the target torque indicating the completion of the expansion and the rotational speed of the servomotor are superimposed and displayed in a graph on a time axis, And a tool counter display screen for indicating a replacement timing of the consumable parts consumed in accordance with the number of times of collection of the consumable parts. The control apparatus according to claim 1, wherein the controller displays the magnified torque on the display means in a graph on a time axis, overlays and displays the level indicative of the target torque, and displays the magnified torque over the graph on the time axis of the magnified torque Tube extension device.

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