JPH0532142B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention [Field of Industrial Application] The present invention relates to a pipe end processing device, and more particularly to a pipe end processing device that press-works the end of a pipe using a punch and a die.

[Prior Art] Conventionally, pipes with flared ends or the like have been widely used in hydraulic piping for automobiles, aircraft, etc. This flaring process is performed by clamping the end of the pipe with a female die and feeding a predetermined amount of male punches using a punch drive device. In addition, two-punch and three-punch processes, such as double flaring and expanded flaring, are also performed using several types of punches in multiple steps.

[Problems to be Solved by the Invention] However, these conventional pipe end processing devices have the following problems. That is, (1) A pipe end processing device that performs two-punch or three-punch processing is equipped with a punch exchange device to automatically exchange several types of punches.
However, the operator had to replace the die each time.

(2) Furthermore, after replacing the die, it is necessary to center each of the several types of punches and the die, making the centering work cumbersome.

(3) Furthermore, the adjustment amount for the above-mentioned centering was minute, and adjustment required skill.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has been made with the object of providing a pipe end processing device that is equipped with two or more sets of dies and that automatically exchanges the dies.

Structure of the Invention [Means for Solving the Problems] In order to achieve the above object, the present invention has the following structure as a means for solving the problems. That is, as shown in FIG. 1, it is equipped with a punch driving means M1 that sends a punch for pressing the end of the pipe P together with a set of dies to a processing position by a ram shaft, and two or more punches, and A pipe end processing apparatus comprising: a punch exchanging means M2 that is moved in a direction substantially orthogonal to the ram shaft and coupled to the ram axis; a punch that detects the position of the punch moved by the punch exchanging means M2; Position detection means M3
and a die changing means M4 that includes two or more sets of dies and moves the dies in a direction substantially orthogonal to the moving direction of the punch and the axial direction of the ram shaft, and the die that is moved by the die changing means M4. die position detection means M5 for detecting the position of the punch; fixing means M6 for fixing the pipe P by moving at least one of the dies in a direction intersecting the ram axis; and the punch position detection means M for detecting the position of the punch.
a punch exchange control means M7 which detects the position of the die by the die position detection means M5 and controls the punch exchange means M2 to move the punch to a position according to the command value; controlling the die changing means M4;
die exchange control means M8 for moving the die to a position according to the command value; outputting a command value corresponding to a preset position to the die exchange control means M8 to move the die; and fixing means M6 for moving the die; is controlled to fix the pipe P, output a command value corresponding to a preset position to the punch exchange control means M7 to move the punch, and control the punch drive means M1 to move the punch to the processing position. This is a structure of a pipe end processing apparatus characterized by comprising: a processing control means M9 for processing the end of the pipe P into a predetermined shape by feeding the pipe P to the pipe P;

[Function] The pipe end processing device of the present invention having the above configuration moves two or more punches by the punch changing means M2 and connects them to the ram shaft, and the punches fed to the processing position by the ram shaft and The end of the pipe is machined using a die that fixes the end of the pipe, and the punch exchange control means M7 and the die exchange control means M8 are controlled by the processing control means M9, so that the punch and the die are fixed. The end of the pipe P is processed based on the command value while adjusting the center position of the pipe P.

That is, the punch exchange control means M7 controls the punch exchange means M2 based on a predetermined command value, and moves the punch by an amount of movement according to the command value. Furthermore, the die exchange control means M8 controls the die exchange means M4 based on a predetermined command value, and moves the die by an amount of movement according to the command value.

Therefore, the fixing means M6 is driven to fix the pipe P, and the processing control means M9 outputs a preset command value to control the punch exchange control means M7 and die exchange control means M8 to drive the punch. By feeding the punch to the processing position by the means M1, it serves to press the end of the pipe P.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 2 is a schematic diagram showing, as a perspective view, the mechanical construction of a pipe end processing device according to an embodiment of the present invention. This pipe end processing device includes a punch exchange device 8 that vertically moves seven punches 1, 2, 3, 4, 5, 6, and 7, and a punch position detector that detects the positions of these punches 1 to 7. A device 10, a die changing device 16 that moves four sets of dies 12, 13, 14, and 15 in the horizontal direction, a die position detection device 18 that detects the positions of these dies 12 to 15, and a pipe P that moves the dies 12 to 15. Fixing device 2 fixed by hydraulic cylinder 20 via
2. A punch drive device 24 for driving the punches 1 to 7 to the processing position is provided.

The punch exchange device 8 has punch holders 26, 27, 28, 29, 30, 31, 32 to which the punches 1 to 7 are each fixed and a T groove is formed at the other end, and the punch holders 26 to 32 are arranged at regular intervals. ,
Holder table 3 equipped with holder housings 36 each slidably supported via bushes 34
8. A ball screw 40 screwed together with the holder table 38, and a DC motor 4 that rotates the ball screw 40.
It consists of 2, etc. Therefore, when the DC motor 42 rotates, the holder housing 36 along with the holder table 38 is slid in the vertical direction.

The punch position detection device 10 is composed of a timing belt 44 that transmits the rotation of the pole screw 40, a pulley 46 rotated by the timing belt 44, an encoder 48 to which the pulley 46 is attached, etc., and detects the amount of movement of the holder housing 36. can be detected by the encoder 48.

The die changing device 16 has four sets of dies 12A, 12B, 13A, 13B, 14 each consisting of two split molds.
A, 14B, 15A, 15B, one die 12
A, 13A, 14A, 15A are fixed at regular intervals to a clamper 50, and a die 12 facing this
A die housing 52 in which B, 13B, 14B, and 15B are fixed at regular intervals, two guide bars 54 (one guide bar is not shown) that slidably supports the clamper 50, and two guides. A compression spring 56 coaxial with the bar 54 and provided between the clamper 50 and the die housing 52, a die table 58 equipped with the die housing 52 and two guide bars 54, and a ball screw screwed into the die table 58. 60, Rotate the ball screw 60
It is composed of a DC motor 62, etc. Therefore,
When the DC motor 62 rotates, the die table 58
The clamper 50 and the die housing 52 are slid horizontally.

The die position detection device 18 is composed of a timing belt 64 that transmits the rotation of the ball screw 60, a pulley 66 rotated by the timing belt 64, an encoder 68 to which the pulley 66 is attached, etc., and detects the amount of movement of the die housing 52. can be detected by the encoder 68.

The punch drive device 24 has a T-shaped protrusion at the tip,
a ram shaft 70 that couples with the T groove of the punch holder 26;
It is comprised of a hydraulic cylinder 72 that drives the ram shaft 70 and feeds the punches 1 to 7 to the machining position.

Here, the axis of the ram shaft 70 and the holder table 3
The sliding direction of die table 58 and the sliding direction of die table 58 are respectively perpendicular to each other.

Further, the hydraulic cylinder 20 of the fixing device 22 is provided in a press-processed part, and has two guide bars 54.
The clamper 50 guided by the hydraulic cylinder 20 is pressed by the hydraulic cylinder 20 and moves in parallel against the spring 56. Therefore, the pipe P can be reliably fixed by the die 12A fixed to the clamper 50 and the die 12B fixed to the die housing 52.

Next, the electrical system of this embodiment will be explained using the block diagram shown in FIG. Each of the above devices is driven and controlled by an electronic control circuit 100 to press the end of the pipe P. As shown in FIG. 3, the electronic control circuit 100 serving as a control means is configured with a well-known CPU 101, ROM 102, RAM 103, and backup RAM 104 as the core of a logical operation circuit, and an input/output circuit that performs input/output with an external motor, etc. Here, terminal input circuit 10
5. Pulse input circuit 107, drive output circuit 10
8. The motor drive output circuit 109 and the like are connected to each other via the common bus 110, and data is exchanged with each other to connect the punch exchanger 8 and the die exchanger 1.
6. Controls the fixing device 22 and punch drive device 24.

Here, the terminal input circuit 105 inputs data such as the amount of movement of the punch and die from the keyboard 106, and the pulse input circuit 107 inputs pulse signals from the encoders 48 and 68.

On the other hand, the drive output circuit 108 outputs a signal to a solenoid valve (not shown) for controlling the operation of the hydraulic cylinders 20, 72, and the motor drive output circuit 1
09 outputs a drive signal to the DC motors 42, 62.

Next, the processing carried out in the above-mentioned control circuit 100 will be explained with reference to the flowchart of FIG. 4, taking as an example the case of three-punch processing.

The power to each of the pipe terminal devices is turned on, and operations such as setting the movement amount of punches 1 to 7 and dies 12 to 15 and returning the punch table 38 and die table 58 to the origin are performed from the terminal 106. The amount of movement is the distance between the punches 1 to 7 from the predetermined origin and the distance between the dies 12 to 15 from the original position. Each interval also includes a correction amount for errors in the core due to manufacturing errors of punches and dies that are pre-processed on a trial basis.

When the operation is started, the press processing control routine shown in FIG. 4 is repeatedly executed together with other control routines. First, in step 200, a process is performed in which the value of a variable n used as a counter in the processes subsequent to step 210 is set to an initial value of 0. Next, in step 210, data inputted in advance from the keyboard 106 in another control routine (not shown) is stored in the RAM 10.
A process of reading out the amount of movement of the die stored in the third memory is performed. In the following step 220, the DC motor 62 is rotated according to the read movement amount of the die.
The die table 58 is moved via the ball screw 60. When the ball screw 60 is rotated, the movement amount of the die table 58 is detected by counting pulse signals input from the encoder 68, and when it becomes equal to the read movement amount of the die, the die table 38 is moved. will be stopped.
In step 230, the operator sets the pipe P on the die 12B, and when the operator presses the start switch provided on the keyboard 106, the hydraulic cylinder 20 is driven and the opposing dies 12A, 12B are activated.
The pipe P is fixed by this.

In step 240, input information previously entered from the keyboard 106 in another control routine (not shown) is entered.
A process is performed to read the movement amount of the punch stored in the RAM 103 or the like. In the next step 250,
DC motor 4 according to the read movement distance of the punch.
2 is rotated, and the punch table 38 is moved via the ball screw 40. When the ball screw 40 is rotated, the amount of movement of the punch table 38 is detected by counting pulse signals input from the encoder 48, and when the amount of movement of the punch table 38 becomes equal to the amount of movement of the punch that has been read out, the punch table 38
8 is stopped. In step 260, the ram shaft 70 is driven by the hydraulic cylinder 72, whereby the punch 1 is fed to the processing position, and the punch 1 and die 12 perform press processing. After press working, the ram shaft 70 is driven by the hydraulic cylinder 72, and the punch 1 returns to its original position. When the pressing process is completed, the process proceeds to step 270. At step 270, assuming that the first press work has been completed, a process is performed in which the value of the variable n is incremented by one. Next steps
At 280, a comparison of the number of punches is performed. If the number of actual punches is less than the preset number of punches, the process moves to step 240. If the actual number of punches matches the preset number of punches, the process advances to step 290. In step 290,
The pipe P is opened. This is achieved by releasing the pressure on the hydraulic cylinder 20 and causing the clamper 50 to rise due to the spring 56.

On the other hand, when three-punch processing is performed as in this embodiment, the process returns to step 240 and processes from steps 240 to 270 are repeated. In step 240,
A preset amount of movement from punch 1 to punch 2 is read out, and in the following step 250, the punch table 38 is moved in accordance with this read amount of movement, and punch 2 is coupled to ram shaft 70. Ru. In the following step 260, the punch 2 is sent to the processing position and pressing is performed, and after the processing is completed, the process proceeds to step 270. In step 270, the value of variable n is incremented by one. In the following step 280, the number of punches is compared, and if the number of punches is less than the preset number of punches, the process proceeds to step 240. Here, steps 240 to 270 are performed again. In step 240, the preset punch 2
The amount of movement from to the punch 3 is read out,
In the following step 250, the punch table 38 moves according to the read movement amount, and the punch 3 is coupled to the ram shaft 70. Continuing steps 260
Then, the punch 3 is sent to the processing position and press processing is performed, and after the processing is completed, the process proceeds to step 270.
In step 270, the value of variable n is incremented by one. In the following step 280, the number of punches is compared, and if the conditions are met, the process proceeds to step 270, the pipe is opened, and the process exits to "NEXT" to end this control routine.

Here, we have explained the case where 3-punch processing is performed using die 12, but die 13 and punch 4,
5 and 6 can also be used to perform three-punch processing of different shapes in the same manner as described above. Further, another die 14 or 15 may be used to perform two-punch processing or the like.

In addition, in the above, we have explained the case where several types of punches are used for processing with one type of die.
Conversely, it is also possible to process with one type of punch using several types of dies. Furthermore, it is also possible to use several types of punches and several types of dies to form the end of the pipe into a certain shape.

The pipe end processing device of this embodiment configured as described above replaces the punch with the punch changing device 8 according to a preset movement amount, and performs two punches,
Processing such as 3 punches can be performed continuously without setup changes. Furthermore, by exchanging dies using the die exchanging device 16 according to a preset movement amount, machining of different shapes or pipes with different diameters can be continuously performed without changing setups. Further, since the amount of movement can be set freely, and the axis of the ram shaft 70, the sliding direction of the punch table 38, and the sliding direction of the die table 58 are perpendicular to each other, the punch 1 Centering adjustment between 7 to 7 and dies 12 to 15 can be easily performed by setting the amount of movement of each punch and each die.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments in any way, and it goes without saying that the present invention can be implemented in various different forms without departing from the gist of the present invention.

Effects of the Invention As detailed above, the punch end processing device of the present invention is equipped with a punch changing device and a die changing device, so that the operator can change the die each time even if the diameter of the pipe is different. There is no need to do it,
It can be done automatically and continuously. Furthermore, centering adjustment between the punch and die can be easily performed by setting the amount of movement of each punch and each die, and there is also an effect that no skill is required for adjustment.

Further, since machining can be performed by controlling two or more punches and dies, the degree of freedom in machining the end of the pipe can be increased.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram illustrating the basic configuration of the present invention, FIG. 2 is a schematic configuration diagram showing a perspective view of the configuration of a pipe end processing apparatus as an embodiment of the present invention, and FIG. FIG. 4 is a block diagram showing the configuration of the electrical system, and FIG. 4 is a flowchart showing an example of a control routine performed in the control circuit of the embodiment. P...Pipe, 1, 2, 3, 4, 5, 6, 7...
...Punch, 8...Punch exchange device, 10...Punch position detection device, 12, 13, 14, 15...Die, 16...Die change device, 18...Die position detection device, 20,72...Hydraulic pressure Cylinder, 22...
Fixing device, 24...Punch driving device, 42, 62
...DC motor, 48, 68...Encoder, 7
0... Ram shaft.

Claims (1)

[Scope of Claims] 1. Punch driving means for feeding a punch for pressing the end of a pipe together with a set of dies to a processing position by a ram shaft, and two or more punches, the punch being abbreviated as the ram shaft. A pipe end processing device comprising: a punch exchanging means for moving in an orthogonal direction and connecting to the ram shaft; and a punch position detecting means for detecting the position of the punch moved by the punch exchanging means; a die changing means comprising the die described above and moving the die in a direction substantially orthogonal to the moving direction of the punch and the axial direction of the ram shaft; and a die detecting the position of the die moved by the die changing means. a position detecting means; a fixing means for fixing the pipe by moving at least one of the dies in a direction intersecting the ram axis; a position of the punch is detected by the punch position detecting means, and the punch changing means is controlled. and a punch exchange control means for moving the punch to a position according to the command value; detecting the position of the die by the die position detection means, and controlling the die exchange means to move the die to the command value. a die exchange control means for moving the die to a corresponding position; outputting a command value corresponding to a preset position to the die exchange control means to move the die; controlling the fixing means to fix the pipe; A command value corresponding to a preset position is output to the punch exchange control means to move the punch, and the punch driving means is controlled to feed the punch to a processing position to shape the end of the pipe into a predetermined shape. A pipe end processing device comprising: processing control means for processing;