JPS58173040A - Blank carrying device of press machine - Google Patents

Abstract

PURPOSE:To prevent lowering of production due to the deficiency of blank materials, by providing a double blank separating station on the way of carrying in, separating one of blank material of a double-blank, and carrying it to dies in next process. CONSTITUTION:A blank material 1 is carried into dies 4 in carrying process 5. At the same time, a double-blank separating station 8 is provided in the carrying process 5. When the double-blank is detected, a carrying device moves from a path (b) to a path (c) and proceeds to the station 8. One of the double blanks 1 is separated, and remaining blank material is carried into dies 4 from a path (d) through a path (e). The carrying device moves again to the station 8 through paths f g h. Separated blank material 1 is moved through paths d e and carried into dies 4. By this way, even if a double-blank is generated in the carrying process 5, no deficiency of blank material 1 required for production occurs.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a blank conveying device for a press machine provided with a double blank separation station.

Conventionally, when a double blank was detected in the blank conveyance device of a press machine when carrying a flank into the press machine, that blank material was ejected from the line before being carried into the press machine, and a new blank material was carried in. . For this reason, even if you prepare the required number of blank materials at the destacking position for production, if double blanking occurs, there will be a shortage of blank materials, so you must either reset the blank materials discharged by the double blank each time, or The blank material had to be prepared separately, and the press machine had to be stopped during that time, resulting in problems such as a drop in productivity.

This invention was made for the purpose of solving this problem, and when a double blank separation station is provided in the middle of the blank conveyance line and a double flank occurs, this double blank separation station completely separates one blank. At the same time, we will provide a complete plank conveying device for press machines that transports this separated blank material to the next press machine, thereby preventing the shortage of blank materials due to double blanking and the resulting drop in productivity. That is.

Hereinafter, one embodiment of the present invention will be described in detail with reference to all the drawings.
FIG. 1 shows the blank transport line and the transport process in the case of one process, FIG. 2 shows the transport process in the case of the third process, and FIG. 3 shows the control circuit.

In other words, the blank conveyance line shown in FIGS. 1 and 2 has a distack position 2 in which the production number of blanks 1 are arranged side by side at a pitch of α, and a vacuum cup or the like to transport the stacked blanks 1 in these distack positions 2. A step 5 of sucking the blank material 1 with the holding means 3 of the press machine and carrying it into a mold 4 of a press machine (not shown), a step 6 of transporting the blank material 1 formed in the mold 4 out of the mold 4, and a step 6 of transporting the blank material 1 that has been transported out of the mold 4 The press machine is equipped with a plurality of molds 4, and in the case of one process, 401 of these molds are used, and in the case of three processes, the unloading position 7 is used for unloading. Pressing is performed using these 403 molds in sequence. Further, a double blank separation station 8 is provided between the destacking position 2 and the mold 4, and the destacking position 2
When a double blank occurs in the blank material I held at the double blank separation station 8, one side of the blank material 1 is separated as follows.

Next, to explain the conveyance operation of the blank material 1 while also including the control circuit shown in FIG.
When selecting manual, semi-automatic, automatic or interlocking mode using the operation panel 11 connected to Input the various data collected from the distack position 2 to the central processing unit 10 in (3), set each interlock condition, etc., and use the output from the central processing unit 10 to select the stack to which the vacuum cup 3α of the holding means 3 is to be carried. Position on material 1. After that, the holding means 3 is lowered and the vacuum cup 3
It adsorbs to the blank material and rises.

At this time, a double blank is detected in step (3). That is, the vacuum cup 3α is provided with a double blank detection head 12 as shown in FIG. 4, and detects whether the blank material 1 attracted by the vacuum cup 3α is a double blank, for example, using an electrostatic capacity method. If the blank material 1 currently attracted to the vacuum cup 3α is a double blank, the plate thickness will be twice that of the normal one, so the capacitance detected by the detection head 12 will also be a different value from the normal one.
This value is input to the amplifier 13 of the double blank detection circuit shown in FIG. The storage circuit 16 stores reference values in advance, and the reference values are output to upper limit circuits 17 and 18, and the upper and lower limits of the reference values are output from these circuits to comparators 14 and 15, respectively. and is compared with the value detected by the detection head 12.

Note that the upper and lower limits of the reference value are set within ±20 to 30 yen, taking into account detection errors, thickness errors of the blank material 1, and the like. If the value detected by the detection head 12 exceeds the upper limit of the reference value, the comparator 14 outputs a cedar pull blank signal (A) to the central processing unit 10, and if it does not exceed the lower limit, a miss clamp signal is output. (b) is the central processing unit 10
Output to.

On the other hand, when the central processing unit 10 detects a double blank in step (2), the process proceeds to step (2) and gives an instruction to the transfer means 19 in the carrying-in process 3 to move to the double blank separation station 8. The blank material 1 is then strained and proceeded to the blank separation station 8, where one side of the blank material 1, which has become a double blank, is forcibly separated by adsorption by a separation means 20 such as a vacuum cup provided below. When the removal of the double blank is completed in step (2), proceed to step (2), return the holding means 3 to the carrying-in step 3 again via the path df, proceed to step (2), and transfer the blank to one piece of the mold 4 via the normal path g=iH. Material 1
' to be brought in. After carrying in the blank material 1, the transfer means 19 follows the path f→5-+ A-+ shown in FIG. 1 in response to a command from the central processing unit 10 in which the double blank is stored.
The blank material 1 separated by the double blank in the previous process is adsorbed in the step (i), moves to the route cl-+e f, and the blank material 1 is carried into the mold 4. do. Thereafter, the transfer means 19 proceeds to step (2) until a double blank occurs again, and performs the normal loading process 3. That is, the path α→l) −>
6→f-+1→h→α will be repeated.

- The blank material 1 which has been formed by the blade die 4 is carried out to the unloading position 7 by a carrying out process 6 in which the blank material 1 is moved from the path → k −+ l −+ m−+ rule → o'f<.

Note that the above is a case of one process, but in the case of three processes, the unloading process 6 becomes only three stages as shown in FIG. Since they are similar, their explanation will be omitted. Further, 21 in the figure indicates a control system of the press machine.

As described in detail above, this invention provides a double blank separation station δ in the middle of the blank delivery process, so that when a double blank occurs, one side of the blank that has become a double blank is completely separated at the double blank separation station. In addition, since all separated blanks are then carried into the press machine, there is no shortage of blanks required for production even if double blanks occur during the carrying process. This eliminates the need to stop the press line during production and replenish missing blanks, making it possible to prevent a drop in productivity due to a lack of blanks.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, FIG. 1 is an explanatory diagram showing a conveyance line in the case of one process, FIG. 2 is an explanatory diagram showing the conveyance line in the case of three processes, and FIG. 3 is an illustration of the control circuit. The block diagram, Figure 4 is the circuit diagram of the double blank detection section, and Figure 5 (
(b) or 9 is an explanatory diagram of the operation, and FIG. 6 is a flowchart of the same. 1 is a blank material, 2 is a distack position, 4 is a mold, 5 is a carry-in process, 6 is a carry-out process, 7 is an unloading process, and 8 is a double blank separation station. Applicant Komatsu Ltd. Representative Patent Attorney Masaaki Yonehara Patent Attorney Tadashi Hamamoto 1 N Figure 2

Claims (1)

[Claims] The blanks 1 stacked at the distack position 2 are sequentially carried into the die 4 of the press machine through the carry-in process 5 by the transfer means 19, and the blanks 1 that have been formed by the die 4 are transferred to the carry-out process 6. In the case of carrying out to unloading position 7 through
A double blank separation station 8t is provided in the middle of the process, and when double clamping occurs, one of the blanks 1 that has become a double blank is separated at the double blank separation station 8, and the separated blank 1 is transferred to the next process. A blank conveying device for a press machine that transports blanks into a mold 4.