JP3018213U - Aluminum extrusion controller - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of the present invention is to prevent the extruded product from popping out at the initial stage of extrusion by a die having a small extrusion resistance and to enable feedback control. A valve for instructing an opening degree of a control valve of a hydraulic circuit 9 so that a moving speed of a puller 13 detected as an extrusion speed of an extruder 1 matches a target extrusion speed set by a preset volume 18. In an extrusion control device including a controller 17 that outputs an opening degree instruction signal, an auxiliary volume 19 for setting the upper limit value of the opening degree of the control valve is provided, and the valve opening degree instruction signal is compared with the upper limit value. An output unit 20 for adjusting the control valve by outputting the smaller opening to the hydraulic circuit 9 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an aluminum extrusion control device that controls the extrusion speed in aluminum extrusion.

[0002]

[Prior art]

 FIG. 3 is a schematic configuration diagram of a conventional example. In FIG. 3, 1 is an aluminum extruder, and this aluminum extruder 1 is a container in which a heated billet 2 of aluminum is placed in a container 3. The extrusion ram 5 is pressed through the dummy block 4, and is extruded from the die 7 held by the die holder 6 on the opposite side of the ram 5 to obtain the profile 8. The hydraulic mechanism for generating the extrusion pressure of the aluminum extruder 1 includes a hydraulic circuit 9 including a hydraulic pump as a power source and a control valve whose valve opening is adjusted as described later. And a cylinder 10 for operating the extrusion ram 5 by the hydraulic power of.

The profile 8 extruded from the aluminum extruder 1 is taken out by a puller 13 that is composed of a chuck 11 that holds the end portion of the aluminum extrusion 1 and a carriage 12 that is integral with the chuck 11. The pulling movement of the puller 13 is performed by winding the wire 14 attached to the puller 13 with a wire winder 15, and the moving speed of the puller 13 is adjusted so that the tension of the wire 14 becomes constant. Controlled.

The moving speed of the puller 13 is detected as an extrusion speed by, for example, a speed sensor 16 mounted on the puller 13, and an output voltage of the speed sensor 16 is given to a controller 17 that controls the extrusion speed. To be

When the die having a large extrusion resistance is used to perform extrusion, that is, when the product having a relatively low extrusion speed is extruded, the controller 17 is operated via the switch 30 in the illustrated state. In this case, a voltage corresponding to the target extrusion speed is input from the preset volume 18, and in this case, in order to make the moving speed of the puller from the speed sensor 16 coincide with the target extrusion speed, A valve opening instruction signal is output to the hydraulic circuit 9 of the extruder. As a result, the moving speed of the puller corresponding to the extrusion speed is feedback-controlled so as to match the target extrusion speed.

On the other hand, when performing extrusion using a die having a small extrusion resistance, that is, when performing extrusion of a product having a relatively high extrusion speed, the switch 30 having two contact points is switched and preset. The voltage corresponding to the target extrusion speed set by the volume 18 is directly supplied to the hydraulic circuit 9 of the extruder without being supplied to the controller 17. Therefore, in this case, the feedback control by the controller 17 is not performed.

The setting of the target extrusion speed by the preset volume 18 is performed by the operator according to a work instruction sheet corresponding to the die used.

The reason why the controller 17 does not perform the feedback control when the die having the small extrusion resistance is used for the extrusion as described above is as follows.

At the start-up at the initial stage of extrusion, since the movement of the puller 13 has a mechanical delay, the movement speed of the puller 13 is not detected despite the start of extrusion. FIG. 4 shows the initial state of the extrusion, FIG. 4A shows the change in the moving speed of the puller 13, and FIG. 4B shows the change in the extruding speed of the profile 8. are doing. As shown in this figure, in the initial period T of extrusion, the moving speed of the puller 13 is 0 although the extrusion of the profile 8 is started.

Therefore, when the feedback control by the controller 17 is performed, the extrusion speed is maximized, that is, the opening of the control valve is maximized in the period T until the movement speed of the puller 13 is detected. Then, the valve opening instruction signal is given to the hydraulic circuit 9 so as to maximize the flow rate. For this reason, when extrusion is performed using a die with a small extrusion resistance, the shape material 8 jumps out of the die 7, and the shape material 8 bends extremely between the die 7 and the puller 13. This is because there are difficulties.

[0011]

[Problems to be solved by the device]

 However, in the conventional example in which the feedback control by the controller 17 is not performed, the operator must constantly monitor the extrusion speed and adjust the preset volume 18 as necessary, and the opening of the control valve remains constant. In general, the extrusion speed increases as the temperature rises as shown in FIG. 5, so that the quality of the product is apt to deteriorate, and the operator's adjustment is left to the control. Therefore, there is a problem that it is difficult to make the process uniform.

The present invention has been made in view of the above points, and prevents the extruded product from popping out at the initial stage of extrusion when a die having a small extrusion resistance is used to perform feedback control. The purpose is to be able to.

[0013]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is configured as follows.

That is, the aluminum extrusion control device of the present invention comprises an extruder for extruding an aluminum extruding material from a die to obtain an extruded product by operating an extruding ram by hydraulic power of a hydraulic circuit, and an end portion of the extruded product. Of the control valve of the hydraulic circuit so that the puller moving while holding the extruded product and the moving speed of the puller detected as the extrusion speed of the extruder match the target extrusion speed. A control unit that outputs a valve opening instruction signal that indicates the opening, a setting unit that sets the upper limit value of the opening of the control valve, the valve opening instruction signal from the control unit, and the setting unit And an output unit that outputs a signal corresponding to the smaller opening degree to the hydraulic circuit, and the control unit controls the hydraulic circuit according to the signal output from the output unit. You The opening of the valve is adjusted to control the extrusion speed of the extruder.

[0015]

[Action]

 According to the above configuration, the valve opening instruction signal from the control unit is compared with the upper limit value signal from the setting unit where the upper limit value of the control valve opening is set, and the signal corresponding to the smaller opening Is output to the hydraulic circuit and the extrusion speed is controlled by adjusting the opening of the control valve.Therefore, when performing extrusion using a die with low extrusion resistance, set the upper limit value of the opening. By doing so, even if the control unit outputs the valve opening instruction signal that indicates the maximum opening because the moving speed of the puller is not detected at the initial rising of the extrusion, the upper limit set by the setting unit is set. Since the opening of the control valve is limited by the value signal, it is possible to effectively prevent the profile from jumping out of the die. Further, when the pushing speed becomes stable and the puller moving speed approaches the target pushing speed, the valve opening instruction signal from the control unit becomes smaller than the opening value of the upper limit value signal. Feedback control will be performed.

When performing extrusion using a die having a large extrusion resistance, the upper limit value of the opening should be set high so that the opening of the valve opening instruction signal of the control unit becomes smaller. As a result, feedback control is performed as in the conventional case.

[0017]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention, and portions corresponding to the conventional example of FIG. 3 are denoted by the same reference numerals.

In the figure, 1 is an aluminum extruder, and this aluminum extruder 1 puts an aluminum billet 2 which is a heated extrusion material into a container 3 and uses an extrusion ram 5 via a dummy block 4 The profile 8 is obtained by pressurizing and extruding from a die 7 held by a die holder 6 on the opposite side of the ram 5. The hydraulic mechanism for generating the extrusion pressure of the aluminum extruder 1 includes a hydraulic circuit 9 having a hydraulic pump as a power source and a control valve whose opening is adjusted as described later, and a hydraulic circuit 9 from the hydraulic circuit 9. And a cylinder 10 for operating the pushing ram 5 by hydraulic power.

The shape member 8 as an extruded product extruded from the aluminum extruder 1 is taken out by a puller 13 including a chuck 11 that holds an end portion of the aluminum extruded product 1 and a carriage 12 that is integral with the chuck 11. The pulling movement of the puller 13 is performed by winding the wire 14 attached to the puller 13 with a wire winder 15 so that the tension of the puller 13 becomes constant. The speed of movement is controlled.

The moving speed of the puller 13 is used as an extrusion speed and detected by a speed sensor 16 mounted on the puller 13, and the output voltage of the speed sensor 16 is supplied to a controller 17 as a control unit for controlling the extrusion speed. Given.

The above configuration is similar to the conventional example of FIG.

In this embodiment, in order to prevent the shape member 8 from jumping out of the die 7 at the initial stage of extrusion when performing extrusion using a die having a small extrusion resistance, and to perform feedback control. , Is configured as follows.

That is, in this embodiment, the switch 30 as in the conventional example of FIG. 3 is not provided, and the voltage corresponding to the target extrusion speed set by the preset volume 18 is directly input to the controller 17. Therefore, the controller 17 outputs a valve opening degree instruction signal for instructing the opening degree of the control valve of the hydraulic circuit 9 so that the moving speed of the puller 13 detected as the extrusion speed matches the target extrusion speed. To do. Therefore, the operation of the controller 17 itself is similar to that of the controller 17 of the conventional example.

In this embodiment, an auxiliary volume 19 is provided as a setting unit for setting the upper limit value of the opening of the control valve of the hydraulic circuit 9, and the valve opening instruction signal from the controller 17 and the auxiliary volume are provided. An output unit 20 is provided which compares the upper limit value signal from 19 and outputs the signal with the smaller opening to the hydraulic circuit 9 to adjust the opening of the control valve.

According to this embodiment, if the opening degree of the valve opening instruction signal from the controller 17 is equal to or larger than the upper limit value set by the auxiliary volume 19, the opening degree of the control valve is limited to the upper limit value. Therefore, if the opening degree of the valve opening instruction signal from the controller 17 is less than the opening degree set by the auxiliary volume 19, the opening degree of the control valve is the valve opening instruction from the controller 17. It will be adjusted by the signal.

Next, the operation of the aluminum extrusion control device having the above configuration will be described in more detail.

First, when extrusion is performed using a die having a small extrusion resistance, the operator sets a target extrusion speed corresponding to the die with the preset volume 18 as in the conventional example, and , A set voltage corresponding to the target extrusion speed is given to the controller 17.

Further, the operator sets the upper limit value of the opening degree of the control valve by the auxiliary volume 19, whereby the voltage corresponding to the upper limit value of the opening degree is given to the output section 20 as the upper limit value signal. . This upper limit is set to a value such that the profile 8 does not jump out of the die 7 at the time of rising in the initial stage of extrusion.

When the extrusion is started after the above setting, the moving speed of the puller 13 is not detected at the time of its rising due to the mechanical delay of the movement of the puller 13, and therefore the controller 17 sets the maximum extrusion speed. In other words, the valve opening instruction signal is output to the output unit 20 so as to maximize the opening of the control valve. The output unit 20 compares the valve opening instruction signal with the upper limit value signal from the auxiliary volume 19, and outputs the signal with the smaller opening amount, that is, the upper limit value signal to the hydraulic circuit 9 at the initial stage of extrusion. As a result, the opening degree of the control valve is adjusted by the set upper limit value signal.

Since the upper limit value is the extrusion speed at which the profile 8 does not pop out as described above, the profile 8 pops out from the die 7 and the die 7 and the puller 13 at the initial rising of extrusion. It is prevented that the profile 8 is bent excessively in the meantime.

Further, when the pushing speed becomes stable and the moving speed of the puller 13 approaches the target pushing speed, the valve opening instruction signal from the controller 17 becomes smaller than the opening of the upper limit value signal, As a result, the output unit 20 outputs the valve opening instruction signal from the controller 17 to the hydraulic circuit 9, and the valve opening instruction signal adjusts the opening of the control valve to control the extrusion speed. That is, in this case, the feedback control is performed by the controller 17, which eliminates the need for the operator to monitor the extrusion speed and adjust the preset volume 18 as in the conventional example. The process can be made uniform and the quality can be improved.

FIG. 2 is a diagram showing a voltage change for explaining the above operation, and a line A indicated by a one-dot chain line is a voltage corresponding to the upper limit value of the opening set by the auxiliary volume 19. The line B shown by the broken line is the voltage output from the controller 17 as a valve opening instruction signal, and the line C shown by the solid line is given from the output section 20 to the hydraulic circuit 9 to open the control valve. The line D, which is a voltage for actually adjusting the degree and is indicated by a chain double-dashed line, is the output voltage of the speed sensor 16 corresponding to the moving speed of the puller 13.

As shown in this figure, since the moving speed of the puller 13 is not detected at the initial rising of the extrusion, the output voltage of the controller 17 becomes maximum, but this voltage is set by the auxiliary volume 19. Since the voltage is higher than the upper limit voltage, the upper limit voltage is output from the output unit 20 to the hydraulic circuit 9 during this period, and the opening degree of the control valve is adjusted. It will be possible to effectively prevent jumping out of.

When the extrusion becomes stable, the moving speed of the puller 13 approaches the target extrusion speed. Therefore, when the output voltage of the controller 17 decreases and becomes lower than the upper limit voltage, the controller 17 The output voltage is output from the output unit 20 to the hydraulic circuit 9, the opening of the control valve is adjusted, and feedback control is performed.

When extrusion is performed using a die having a large extrusion resistance, the upper limit value of the opening degree of the control valve by the auxiliary volume 19 is set to a substantially maximum opening degree. As a result, the opening degree of the valve opening degree instruction signal from the controller 17 becomes smaller than the upper limit value signal of the auxiliary volume, and the feedback control by the controller 17 is performed. That is, in the case of a die having a large extrusion resistance, the same feedback control as in the conventional example of FIG. 3 is performed.

[0037]

[Effect of device]

 As described above, according to the present invention, since the valve opening instruction signal from the control unit is limited to the upper limit opening set by the setting unit, when performing extrusion using a die with small extrusion resistance. Effectively prevents the extruded product from jumping out of the die at the start-up of the extrusion, and when the extrusion becomes stable, feedback control is performed by the valve opening instruction signal from the control unit. Therefore, unlike the conventional example, the operator does not need to monitor the extrusion speed and adjust the opening of the valve, and the process can be made uniform and the quality can be improved.

Also, when extrusion is performed using a die having a large extrusion resistance, feedback control is performed as in the conventional case.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention.

FIG. 2 is a diagram showing changes in the output voltage used for explaining the operation of the embodiment of FIG.

FIG. 3 is a schematic configuration diagram of a conventional example.

FIG. 4 is a diagram illustrating a mechanical delay of a puller at an initial stage of starting extrusion.

FIG. 5 is a diagram showing changes in extrusion speed.

[Explanation of symbols]

 1 Aluminum Extruder 7 Die 8 Shape Material (Extruded Product) 9 Hydraulic Circuit 13 Puller 17 Controller (Control Section) 19 Auxiliary Volume (Setting Section) 20 Output Section

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hajime Okumura 10 Ouron Co., Ltd. 10 Hanazono Dodocho, Ukyo-ku, Kyoto-shi, Kyoto Prefecture

Claims (1)

[Scope of utility model registration request] 1. An extruder for obtaining an extruded product by extruding an aluminum extruded material from a die by operating an extruding ram by hydraulic power of a hydraulic circuit; A moving puller and a moving speed of the puller, which is detected as the extrusion speed of the extruder, are matched with a target extrusion speed, and a valve opening instruction signal for instructing the opening degree of the control valve of the hydraulic circuit. A control unit that outputs, a setting unit in which the upper limit value of the opening of the control valve is set, the valve opening instruction signal from the control unit and the upper limit signal from the setting unit are compared, An output unit for outputting a signal corresponding to a smaller opening to the hydraulic circuit, the opening of the control valve of the hydraulic circuit being adjusted by the signal output from the output unit. The extrusion speed of Aluminum extrusion control apparatus characterized by being your.