JP2984772B2 - Press entry side material length measurement method, length measurement device, and press entry side material supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press machine inlet equipment for supplying a heated billet as a material to be pressed to a press machine, and more particularly, to measuring the length of a material before supplying the material to the press machine, and measuring the length of the material inside the press machine. The present invention relates to a press-in side material length measuring method, a press-in side material length measuring device, and a press-in side material supply device which eliminates misclamp of a feed bar.

[0002]

2. Description of the Related Art Conventionally, in a press machine inlet side equipment for supplying a billet to a press machine, a billet which has been fed laterally by a conveyor after preforming is pushed axially by a pusher arm to form a forming line in front of the press machine. (In front of the center of the press) on a billet loading device (billet charging device), and the billet is directly supplied to the press from the billet loading device. A billet positioning stopper is arranged above the billet loading device to match the center of the billet in the longitudinal direction with the center of the press machine, and the tip of the billet pushed by the pusher arm is brought into contact with the stopper to position the billet. It is carried out. Before the heated billet is conveyed by the conveyor, it is preformed by a forging roll as a pre-process, but the length of the billet tends to vary at the time of the preforming. The feed bar of the transfer feeder on the main body may cause the billet to be mis-clamped and may damage the transfer feeder.
Conventionally, in order to reduce the variation in the length dimension of the billet, the spacing between the forging rolls is adjusted, but the adjustment operation is difficult. Also, non-conforming billets with large variations are not sorted out on the entry side of the press machine, and when the feed bar mis-clamps the billet, the operation of the press machine is stopped and the defective billet is pressed manually. Had been removed outside the aircraft.

[0003]

As described above, in the conventional press machine inlet side equipment, there is only a conveying device for the material to be pressed from the pre-press working to the press machine, and the machine is put into the press machine. There is no function to check the length of the material to be produced. If the length of the material varies widely, there is a danger that the feed bar will cause misclamping in the press machine body.When misclamping occurs, the press work must be stopped each time and the defective material must be removed by the operator. And the operating rate was decreasing.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a press entry side material length measuring method and a press entry side material length measurement device capable of measuring the length of a material to be pressed before supplying the material to a press machine.

According to the present invention, the length of the material to be pressed is measured before the material is supplied to the press machine, and the material having an inappropriate length is automatically selected and removed. It is an object of the present invention to provide a press entry-side material supply device that prevents the occurrence of a press operation and improves the operation rate of a press operation.

[0006]

According to the present invention, a pre-pressed
Before feeding the press material to the press machine, measure the length at the entrance of the press machine
Measuring method for the material entering the press side of the press machine
In the method, the material to be pressed is loaded on the material input side of the press machine.
The pusher arm of the pusher device attached to the loading device pushes in the axial direction to transfer the material from the material traverse conveyor onto the material loading device, and pushes the shaft of the material to be pressed by pressing the pusher arm on the material loading device. restricting the axial one end portion located by Setto direction one end portion to the stopper, may be set the position of the advance the stopper, the end position of the press material when fed to the press, said pusher arm The length of the material to be pressed is obtained from the amount of movement of the pusher arm until the material to be pressed is clamped between the pusher arm and the stopper from the last retracted position of
If the length dimension is correct, the material
A method for measuring the length of a material on the press-in side, which is characterized by giving a command to feed a press material, is provided.

Further, according to the present invention, a pusher device for pushing a material to be pressed and supplying it to a material loading device on the press machine input side, and an end position of the material to be pressed carried onto the material loading device In the press machine entrance side equipment having a stopper that regulates, an ultrasonic reflector attached to a pusher arm of the pusher device, and an ultrasonic sensor connected to the stopper so as to face the ultrasonic reflector. A press-fitting device, wherein the length of the material to be pressed sandwiched between the pusher arm and the stopper on the material loading device is obtained from a detection signal of the ultrasonic sensor with respect to the ultrasonic reflecting plate. A side material length measuring device is provided.

Further, according to the present invention, a pusher device for pushing a material to be pressed and supplying the material to a material loading device on the press machine input side, and an end position of the material to be pressed carried onto the material loading device In the press machine entrance side equipment having a stopper that regulates, an ultrasonic reflector attached to a pusher arm of the pusher device, and an ultrasonic sensor connected to the stopper so as to face the ultrasonic reflector. ,
A telescopic tube surrounding an ultrasonic path between the ultrasonic reflecting plate and the ultrasonic sensor, an air supply device for injecting air into the telescopic tube, and a reference of the ultrasonic sensor with respect to a reference pressed material length. A signal is set and a discriminating device for judging the suitability or non-conformity of the material to be pressed according to the detection signal of the ultrasonic sensor, and receiving the reject signal from the discriminating device, and before loading the material into the press machine, A press entry material feeder is provided having a rejector for rejecting incompatible material from above the material loading device.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. As described above, the method of measuring the length of a material to be pressed according to the present invention obtains the material length from the amount of movement of the pusher arm of the pusher device, which is usually installed on the entry side of the press machine, during the material pushing operation. . Here, when the material is actually charged into the press, the material is supplied such that the center of the press coincides with the center in the longitudinal direction of the material. FIG. 1 is a schematic diagram showing one example of the case where the method of the present invention is carried out. A worm jack 27 is connected to the rear portion of the stopper shaft of the stopper 8, and the end position of the stopper 8 is adjusted by a drive motor 28 via the worm jack 27. The length N ₁ from a material the intermediate position corresponding to the press center C with respect to the press material now certain specifications to the end position of the stopper 8 is calculated from the rotation of the encoder 29 which is connected to the worm jack 27. Further, the pusher arm 6 of the pusher device 4 is moved in advance from the press center position C.
Discriminating device the distance N ₂ to the most retreated position as data 3
Input to 0. The rear end of the material to be pressed, for example, the billet 1 is pushed by the pusher arm 6 to bring the front end into contact with the stopper 8, and the movement amount (arm stroke) of the pusher arm 6 from the last retreat position at that time. detected by the rotational speed or the like of an encoder combining output or a rack and pinion coupling or built-in linear sensor S _T the pusher device 4, and inputs the discrimination device 30. Here, the length L of the material 1 to be pressed is L = N
Calculated from ₂ -S _T + N _1. Whether the input material is compatible or not is determined based on whether or not the difference ΔL between the reference lengths L ₀ and L set in the determination device 30 is within an allowable range (that is, the range of M ₁ ).

FIG. 2 is a partial front view of a press entrance equipment having a press entrance material length measuring apparatus according to an embodiment of the present invention, and FIG. 3 is a top view of FIG. The billet 1, which is a material to be pressed, is preformed by a forging roll of a former molding machine (not shown), and is then fed side by side by an endless conveyor 2 and placed one by one on a guide member 3 at the end of the conveyor ( (See FIG. 4). A pusher 4 is provided above the guide member 3 so as to extend in a direction crossing the conveyor 2. The pusher 4 includes a pair of guide rods 5 extending in the longitudinal direction, and a pusher arm 6 slidable in the axial direction is mounted on the guide rods 5 in a hanging manner. Figures 2 and 3
, C represents the center position of the press (not shown), and the pusher arm 6 is moved from the billet pressing position A close to the center C of the press to the pusher end 4a on the opposite side.
Reciprocating movement to a standby position B close to.

A stopper 8 is provided on the opposite side of the guide member 3 with respect to the center position C of the press and opposite to the end 3b of the guide member 3. A sensor mounting bracket 7 extending upward is fixed to the outer portion of the stopper 8, and an ultrasonic sensor 9 is mounted on the upper end of the stopper 8 toward the pusher arm 6. An ultrasonic reflector 12 is attached to the upper end side of the pusher arm 6 via a reflector attaching bracket 10 and a shim 11 so as to face the ultrasonic sensor 9. An outer cylinder 13 is attached to the reflector 12 so as to surround the ultrasonic path of the ultrasonic sensor 9,
An inner cylinder 14 that is loosely inserted into and removed from the cylinder 13 is attached to the sensor mounting bracket 7 with a certain gap from the ultrasonic sensor 9. The ultrasonic sensor 9 is covered with a sensor cover 15 with a space around it.

Referring to FIGS. 5 and 6, the ultrasonic sensor 9 is mounted via a shim 17 and a mounting seat 18 on a bracket 16 extending from the outside of the sensor mounting bracket 7 in the cover 15. . The mounting seat 18 has a clamp groove 19 formed in the upper surface thereof extending in the lateral direction, and the sensor clamper 2 is configured to press the ultrasonic sensor 9 from above.
0 is mounted on the mounting seat 18. The ultrasonic sensor 9 is fixed to the mounting seat 18 by inserting a clamp bolt into the clamp groove 19 of the mounting seat 18 through the sensor clamper 20 and tightening. Here, the vertical position of the ultrasonic sensor 9 is adjusted by the shim 1 between the mounting seat 18 and the bracket 16.
7, the position adjustment in the horizontal direction is performed by loosening the clamp bolt and attaching the sensor clamper 20 to the clamp groove 1 of the mounting seat 18.
9 is possible. An air supply pipe 21 is attached to the cover 15, and cooling air is introduced into the cover 15 from an external supply source via the air supply pipe 21. Note that a heat radiating plate 22 is attached to the sensor cover to further ensure the cooling effect of the ultrasonic sensor 9.

As shown in FIG. 2, a proximity switch 23 is provided on the ultrasonic sensor mounting bracket 7. The stopper 8 includes a stopper shaft 32 of a stationary stopper body, a stopper head 31 held movably by a fixed amount with respect to the stopper shaft 32, and a spring for biasing the stopper head 31 toward the pusher arm 6. 26. The spring 26 is disposed between the back surface of the stopper head 31 and the large-diameter stepped portion of the stopper shaft 32, and the spring force causes the back surface of the stopper head 31 and the stopper to move when the stopper head 31 is not pressed from the billet 1 side. A certain gap is formed between the shaft 32 and the tip. 23a
A striker attached to the stopper head 31 is provided for operating the proximity switch 23 as described later.

The billet 1 locked to the guide member through the preforming in the preceding step is pushed in the longitudinal direction by the pusher arm 6, the tip of the billet hits the stopper 8, and the spring 26 is pushed by the pushing force of the pusher arm 6. The billet 1 is positioned in a state where the tip of the stopper shaft 32 is in contact with the stopper head 31 (the state of FIG. 2). In this state, the billet 1 is pinched by the pusher arm 6 and the stopper 8 that have moved forward to the pressing position A, and at the same time, the cylinder (outer cylinder) 13 on the reflector mounting bracket 10 side and the cylinder on the ultrasonic sensor mounting bracket 7 side. The body (inner cylinder) 14 engages in the telescopic state. The cooling air constantly sent from the air supply source into the cover 15 hits the reflection plate 12 from the inner cylinder 14,
Although the air flows out between the inner and outer cylinders 14 and 13, the striker 32a moves together with the stopper head 31 and the proximity switch 23 fixed to the ultrasonic sensor mounting bracket 7 operates to stop the blowing of the cooling air. , Ultrasonic sensor 9
Thereby, the distance from the sensor surface 9a to the ultrasonic reflection surface 12a of the reflection plate 12 is measured. The length of the billet 1 sandwiched between the stopper 8 and the pusher arm 6 is detected corresponding to the distance between the sensor surface 9a and the ultrasonic reflecting surface 12a. Here, as shown in FIG. 2, the distance D from the sensor surface 9a of the ultrasonic sensor 9 to the stopper surface 8a (provided that the stopper head 31 and the stopper shaft 32 are in contact with each other) and the pusher arm from the reflection surface 12a of the reflection plate 12 By setting the distance E to the billet pressing surface 6a of 6 equal, the billet length can be measured in a one-to-one relationship with respect to the value measured by the ultrasonic sensor 9. The proximity switch for stopping the cooling air when the ultrasonic sensor 9 is operated is operated by the displacement of the stopper head due to the pressing of the billet as described above. Therefore, the proximity switch is operated without affecting the variation of the billet length. obtain.

In the actual measurement, a gauge 24 having a reference size of the billet is previously sandwiched between the stopper 8 and the pusher arm 6, and the measured value of the sensor at this time is used as a reference output signal. (Not shown in FIGS. 2 to 4), the length detection signal of the billet 1 is compared with this reference signal, and if the difference is within an allowable range,
It is conveyed into the press machine by the charging device 25 below the billet, and the pressing process is continued. If it is out of the allowable range, the discriminating device outputs a reject signal, and the incompatible billet on the charging device 25 is rejected by a rejector (not shown). Exclude. Pusher arm 6 is in standby position B at the same time as the measurement is completed.
Then, the cooling air is blown into the cover 15.

In the apparatus of the above embodiment, the ultrasonic reflector constituting the length measuring device is attached to the pusher arm 6, but the billet length is measured by linking a linear sensor or an encoder to the moving member of the pusher arm 6. You may do so.

[0017]

As described above, according to the present invention, the length of the material on the charging device before the material is put into the press machine from the pushing operation of the pusher arm for pushing the billet of the material to be pressed. Is measured and the billet length signal is obtained, so it is possible to judge whether the material to be pressed, which is sequentially sent using the measured value, is suitable or not, before putting the billet into the press machine. Outlying lengths of incompatible material can be eliminated in advance to eliminate mis-clamping of the transfer feeder. Since the pusher device can be used as one member of the billet length measuring device, the equipment cost is reduced. Further, abnormal stoppage of the press machine is reduced, the operation rate is improved, and the burden on the operator for removing defective materials is reduced.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a relationship between a pusher device and a stopper when a length measuring method according to an example of the present invention is performed.

FIG. 2 is a partial front view of a press entrance equipment having a press entrance material length measuring device according to an embodiment of the present invention.

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a partial side view as viewed from an arrow F in FIG. 2;

FIG. 5 is an enlarged front sectional view of a mounting portion of the ultrasonic sensor.

6 is a top sectional view of FIG.

[Explanation of symbols]

Reference Signs List 3 Guide member 4 Pusher 6 Pusher arm 8 Stopper 9 Ultrasonic sensor 12 Ultrasonic reflector 13 Outer cylinder 14 Inner cylinder 15 Sensor cover 20 Sensor clamper 21 Air supply pipe 23 Proximity switch 24 Gauge 25 Charger 30 Discriminator C Press Machine center L Pressed material length L ₀ Reference length

Claims (4)

(57) [Claims] (1) Before supplying a material to be pressed to a press machine,
Press in a press machine that measures length at the entry side of the press machine.
In less entry side material measurement method, the object to be pressed material flop
Pushing in the axial direction with the pusher arm of the pusher device attached to the material loading device on the entry side of the machine to transfer the material from the material traverse conveyor onto the material loading device, and pressing the pusher arm on the material loading device the axial one end portion of the pressing material was brought into contact with the stopper to restrict the axial one end portion position, sets the position of advance the stopper, the end position of the press material when fed to the press In advance,
From the last retracted position of the pusher arm, the length of the material to be pressed is obtained from the amount of movement of the pusher arm until the material to be pressed is pressed between the pusher arm and the stopper. Material loading if correct
Press entry side material measurement wherein the this <br/> to the feed command of the press material to the press machine location. 2. A pusher device for pushing a material to be pressed and supplying the material to a material loading device on the press machine input side, and a stopper for regulating an end position of the material to be pressed carried onto the material loading device. In the press machine entry side equipment having an ultrasonic reflector attached to a pusher arm of the pusher device, and an ultrasonic sensor connected to the stopper so as to face the ultrasonic reflector, The length of a material to be pressed sandwiched between the pusher arm and the stopper on a material loading device is obtained from a detection signal of the ultrasonic sensor with respect to the ultrasonic reflection plate, and a material entering the press-in side is measured. Long equipment. 3. A telescopic cylinder surrounding an ultrasonic path between the ultrasonic reflecting plate and the ultrasonic sensor, an air supply device for injecting air into the telescopic cylinder, and the stopper of the material to be pressed. 3. A press-in side material length measuring device according to claim 2, further comprising: a device for detecting the pressing of the air supply device and stopping the air injection of the air supply device. 4. A pusher device for pushing a material to be pressed and supplying it to a material loading device on the press machine input side, and a stopper for regulating an end position of the material to be pressed carried onto the material loading device. In the press-in equipment having a press machine, an ultrasonic reflector attached to a pusher arm of the pusher device, an ultrasonic sensor connected to the stopper so as to face the ultrasonic reflector, and a reference material to be pressed. A reference device of the ultrasonic sensor for the length is set and a discriminating device for judging whether or not the material to be pressed is suitable or not according to the detection signal of the ultrasonic sensor, and receiving a reject signal from the discriminating device. A press input side material supply device, comprising: a rejector for removing an incompatible material from above the material loading device before loading the material into the press machine.