JPH072124Y2 - Material charging device for press - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a material charging device in a forging press or the like of a circular forging product or the like.

<Prior Art> In a forging press for forging a material in its axial direction such as a circular forging product, as shown in FIGS. Carry it in front of the forging press 3 in a horizontal state that matches
The material is inserted into a receiving member 5 via a chute 4 attached to the tip of the supply conveyor 2 with a downward slope, and the receiving member 5 is oscillated and rotated around a fulcrum pin 6 toward the press side to rotate the material 1 at a constant angle. By rotating the raw material 1, the raw material 1 can be supplied in a vertical state to the loading position of the press, that is, the O step of the transfer device. In this O step, the material 1 is supported by the receiving member 5 and positioned by the stopper 7 attached to the forging press 3, and the material 1 is grasped and held by the transfer device which moves in a rectangular motion in cooperation with the forging press 3 to move the forging press 3 Transferred to the first step.

In such a material charging device, conventionally, an air cylinder 50 is arranged below the supply conveyor 2, and a lever 51 integral with the receiving member 5 is vertically provided below the fulcrum pin 6 and the lever 51 is provided by the air cylinder 50. The receiving member 5 is rotated by a certain angle by swinging and rotating, and the lever 51 is brought into contact with the stoppers 52 and 53 to position the receiving member 5 at the time of receiving the material and at the time of supplying the material.

<Problems to be Solved by the Invention> The air cylinder drive system as described above has the following problems.

(I) If the charge speed is changed to correspond to the press and transfer device as the press speed increases, the lever
The length of 51 or the output of air cylinder 50 must be changed. Also, when changing the charge stroke, the length of the lever 51 and the stroke of the air cylinder 50 must be changed.

(Ii) Air cylinders are effective for presses with low production speeds, but presses with high production speeds lack stability during high-speed operation due to air leaks, etc. I can't follow the press.

(Iii) Stopper 5 at return end and charge end
Since it is positioned by touching 2,53, the impact is large especially at high speed operation, and the stability of the material is poor.

The present invention has been made to solve such a problem, and an object thereof is to provide a material charging device for a press which can easily change a charging speed and a charging stroke and can follow a high-speed press. Especially.

<Means for Solving the Problems> As shown in FIG. 1, the present invention receives the material 1 conveyed in front of the press 3 by the receiving member 5 and swings and rotates the receiving member 5. In a material charging device for the press which is positioned at the loading position of the press 3, a drive lever 10 is connected to a driven lever 8 integrally attached to the receiving member 5 via a link 9, and the drive lever 10
Further, a rotary drive device 11 such as a servo motor or a hydraulic motor for swinging and rotating the drive lever is connected.

<Operation> By rotating the drive lever 10 by a predetermined angle by the rotation drive device 11, the receiving member 5 is oscillated and rotated by a predetermined angle via the link 9 and the driven lever 8. By changing the length and the rotation angle of the drive lever 10, the charging speed can be arbitrarily and easily changed. In addition, an arbitrary charge stroke can be easily obtained only by changing the length or the rotation angle of the drive lever of the drive lever 10.

Since it is a rotary drive, air leakage like an air cylinder,
There is no operation delay, it can be electrically decelerated and stopped, the impact is small, the stability of the material is good, and it is possible to operate at higher speed than the air cylinder.

<Embodiment> Hereinafter, the present invention will be described based on an embodiment illustrated in the drawings. This is an example of a forging press equipped with a transfer device that operates at high speed mechanically interlocking with the press. In addition, the same reference numerals are given to the same or corresponding portions as the conventional one.

As shown in FIG. 1, a chute 4 that is inclined at a downward slope is attached to the press-side end of a conveyor 2 that is conventionally supplied, and a receiving member 5 is provided below the chute 4. The receiving member 5 includes a base 5A for receiving the material 1, and a locking plate 5
B, which is composed of a stopper member 5C for closing the insertion port of the chute 4 during charging, is rotatably attached to the support pin 6 and is inserted into the lower part of the chute 4 through an opening in the charging direction. A fixed cover 12 and a movable cover 13 that cover the support pins 6 are provided at the base of the receiving member 5.

A driven lever 8 integral with the receiving member 5 is provided on the support pin 6 so as to project downward, and the drive lever 10 is installed upward with a distance from the driven lever 8 to the side opposite to the forging press. , The ends of the levers 8 and 10 are connected to each other via a link 9.

The base of the drive lever 10 is attached to the rotary shaft 14,
Servo motor 11 via coupling 15 and reducer 16 to 14
Connected to the servo motor by the signal from the forging press side.
11 is started and stopped so that the drive lever 10 swings and rotates in synchronization with the forging press and the transfer device.

Although the stoppers 17 and 18 are provided as usual, the structure is such that the stoppers 17 and 18 are not applied during normal operation.
Make sure to electrically brake before hitting. Also,
Around the coupling 15, the receiving member 5 has a return end,
Proximity switches 19 and 20 for detecting whether the charging end is present or not are installed, and an actuator 21 thereof is attached to the coupling 15 so as to interlock with the press side. That is, only when the receiving member 5 is located at the return end and the charge end, the signal from the press side is received and the servo motor is received.
Allow 11 to be driven.

In such a configuration, the charging speed is the drive lever 10
It is determined by the length and the rotation angle of the drive lever 10, and by increasing the length of the drive lever 10 and decreasing the rotation angle, the charge speed can be set fast while the charge stroke is constant. Further, the charge stroke can be set small by shortening the drive lever 10 or reducing the rotation angle.

The above structure operates as follows.

(I) In the state where the receiving member 5 is on standby at the return end, the material 1 conveyed on the supply conveyor 2 falls into the receiving member 5 via the chute 4.

(Ii) By a start signal from the press side (of the proximity switch
The servo motor 11 is activated by turning ON (the interlock is released by ON), the receiving member 5 swings and rotates to the charge end, and stops by the stop signal by the detection of the rotation angle of the motor, and the material 1 is positioned in the O process.

(Iii) The material 1 is transferred from the O step to the mold 23 in the first step by the transfer device 22 and is molded.

(Iv) The receiving member 5 to which the material 1 has been carried out swings and rotates to the return end (the interlock is released by turning on the proximity switch) by a start signal from the press side, and a stop signal by the detection of the rotation angle of the motor. And then waits for the next material 1 to be supplied at the return end. The above cycle is repeated to perform continuous operation.

The forging press has been described above, but it goes without saying that the present invention can be applied to other presses.

<Effect of Device> As described above, the material charging device according to the present invention causes the receiving member for receiving the material conveyed in front of the press to swing and rotate by the rotary drive device via the driven lever, the link and the drive lever. As a result, the following effects are achieved.

(I) By changing the length and the rotation angle of the drive lever, the charging speed can be easily changed arbitrarily. Further, it is possible to easily obtain an arbitrary charge stroke simply by changing the length or the rotation angle of the drive lever.

(Ii) Since it is a rotary drive, there is no air leakage or operation leakage like an air cylinder, it can be electrically decelerated and stopped, the impact is small and the material stability is good, compared to conventional air cylinders. It is possible to stably follow the high speed press.

[Brief description of drawings]

FIG. 1 is a partial sectional side view showing a material charging device according to the present invention, FIG. 2 is a partial sectional side view showing a supply state to the press, and FIGS. 3 and 4 are views taken along the line III in FIG. Figure, IV
FIG. 5 is a longitudinal sectional view showing a conventional material charging device, and FIGS. 6 and 7 are sectional views taken along line VI and VII of FIG. 5, respectively. 1 ... Material, 2 ... Supply conveyor 3 ... Forging press, 4 ... Chute 5 ... Receiving member, 6 ... fulcrum pin 7 ... Stopper, 8 ... Following lever 9 ... Link, 10 ... Driving Lever 11 ... Servo motor.

Claims (1)

[Scope of utility model registration request] 1. A material charging device for a press which receives a material conveyed in front of a press by a receiving member and swings and rotates the receiving member so as to be positioned at a press-in position of the press. A material charging device for a press, characterized in that a drive lever is connected to a follower lever that is attached mechanically via a link, and a rotary drive device that swings and rotates the drive lever is connected to the drive lever.