JPH02152585A - Press system - Google Patents

Abstract

PURPOSE:To automate both removal of press oil stuck on a steel sheet and loading thereof onto a tray by arranging a wiping tank equipped with a plurality of arms fitted with an oil absorbent member to the rear step of a press machine and arranging two pieces of tray carriers for housing and transferring the vacant and full trays to the end of a conveyor. CONSTITUTION:At least three arms (wiping tank 20) which have both an oil absorbent member (cloth and oil absorbent paper, etc.) for wiping press oil stuck on a steel sheet 02 and a driving means are arranged along a carrier conveyor 18 in the rear step of a press machine 12. At this time, while a first arm is rotated for the whole surface of the steel sheet, a second arm is driven so that the uneven part of the steel sheet is concentrically wiped and a third arm is driven so that the whole surface thereof is wiped. Furthermore the transfer means 28 branched to two directions are connected to the end of the conveyor. Two tray carriers 30, 32 and a feeding means capable of carrying-in, housing and carrying-out the vacant and full trays 04 and an elevating means are arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to improvements in press systems, and in particular to automation of the removal of press oil used in the press and automation of the storage of steel plates from which the press oil has been removed in trays. This invention particularly relates to a press system for surface-treated steel sheets.

[Prior Art] The inventors have studied press forming of surface-treated steel sheets such as colored steel sheets and galvanized steel sheets.

As is well known, press machines use press oil, so the press oil must be removed from steel plates before shipping. Traditionally, this work has been done manually.

This work is hard labor and requires some form of automation. Here, the inventor first considered cleaning the steel plate with a solvent such as Freon to remove the press oil. However, it has been found that when a solvent such as Freon is used, the surface treatment is damaged at the edges of the steel plate due to press working, making the edges more likely to rust. Therefore, cleaning with a solvent cannot be used.

As a result of repeated studies on this point, the inventor found that it is sufficient to wipe off the press oil using a method that imitates conventional manual wiping. For wiping, for example, a cloth or paper can be used, and this can be attached to an arm to mechanically wipe the steel plate. However, it was found that simply making the arm reciprocate is not enough, and that the arm needs to be divided into at least three parts depending on its function. The first arm evens out press oil adhering to the steel plate and wipes off a portion of the press oil. To do this, the arm may be rotated relative to the steel plate to spread the press oil over the entire surface. If this step is omitted, streaks of press oil will remain on the steel plate. The second arm intensively wipes off uneven areas caused by press molding. Since press oil tends to collect on uneven areas, concentrate on wiping these areas. Then, use the third arm to wipe off the remaining press oil. It was found that by doing this, the press oil could be wiped off uniformly without damaging the surface treatment of the steel plate.

After the press oil has been wiped off, the steel plates are usually stored in trays and shipped in groups. Previously, this work was also done in 1
Each piece was done by hand. However, this work requires automation. The inventor considered this point and decided to (1) provide a pair of tray conveyors, switch the conveyor every time the tray is full, and operate the conveyor continuously, and (2) keep the conveyor empty. Providing two feeding means, a feeding means for feeding the tray and a second feeding means for sending out the full tray, (3) raising and lowering the tray according to the feeding operation of the steel plate, and adjusting the position where the steel plate is fed. I found it necessary to keep it right every time. This invention is based on such considerations.

[Problems of the Invention] An object of the present invention is to automate the removal of press oil after press forming a surface-treated steel plate, and to automate the storage of the steel plate in a tray after wiping off the press oil.

[Structure of the Invention] In the press system of the present invention, a surface-treated steel sheet coated with press oil is press-molded using a press machine. Here, the surface-treated steel sheet includes, for example, a colored steel sheet whose surface is coated with a synthetic resin, a galvanized steel sheet whose surface is plated with zinc, and the like.

Next, the steel plate after press forming is conveyed by a conveyor.

Along this conveyor, at least three arms are provided with oil-absorbing members for wiping off press oil adhering to the steel plate. Then, the first arm is moved so that its oil absorbing member wipes off the press oil while rotating against the entire surface of the steel plate, and the second arm is moved so that its oil absorbing member concentrates on the uneven portions of the steel plate due to press forming. The third arm is moved so that its oil-absorbing member wipes the press oil from the entire surface of the steel plate.

At the leading end of the square conveyor, a transport means having at least two branched ends is provided, and at least one pair of tray conveyors are connected to the leading ends. Each time the trays are filled with steel plates, the direction in which the steel plates are fed by the transfer means is switched from one tip to the other, so that the two tray conveyors are operated alternately. The tray conveyor is provided with an elevating means to move the tray up and down in accordance with the feeding of the steel plate to the tray.

Further, the conveying means is provided with a first feeding means for feeding empty trays into the elevating means and a second feeding means for feeding trays filled with steel plates.

The operation of the system of this invention will be explained. When press oil is removed using a solvent such as Freon, the solvent enters into the scratches in the surface treatment area of the steel plate caused by press forming, damaging the surface treatment of the steel plate. For this reason, when press oil is removed using a solvent, rust tends to form from the edges of the steel plate. The press oil is then removed by wiping. Press oil is removed by attaching oil-absorbing members such as cloth or oil-absorbing paper to at least three arms and wiping the steel plate with them. At least three arms are provided, and the first arm spreads the press oil of the steel plate uniformly over the entire surface of the steel plate. For this purpose, the first arm is caused to rotate relative to the entire surface of the steel plate. Of course, some of the press oil is wiped off during this process. Since press oil is not originally uniformly adhered to the entire steel plate, if the leveling operation of the press oil by the first arm is omitted, stripes may remain on the steel plate due to the density of the press oil. The second arm intensively wipes off the uneven parts caused by press molding. This work is necessary because press oil tends to accumulate in the uneven parts. Wipe off the remaining press oil with the third arm. This wiping operation is performed on the entire surface of the steel plate, but unlike the first arm, a specific movement direction is not required, and a simple reciprocating movement is sufficient. Regarding the movement of the third arm, it is sufficient as long as it wipes the entire surface of the steel plate.

After wiping off the press oil, the steel plate is sent to a tray in a tray conveyor by a transfer means. That is, a tray conveyor is connected to the transfer means. Here, at least one pair of tray conveying machines is provided, and the tip of the conveying means is branched into at least one pair, and one of the conveying machines is operated alternately so that the system does not rest even while sending out full trays. . Each conveyor includes a first feeding means for sending an empty tray to the lifting means, a lifting means for raising and lowering the tray while feeding the steel plate from the transporting means to the tray, and a lifting means for sending a full tray from the lifting means. A second feeding means is provided.

[Example] Examples are shown in FIGS. 1 to 5. In Figure 1, 2 is a motor with a colored steel coil attached to its tip.
The steel plate is sent out from 2. The same effect can be obtained by using a surface-treated steel plate such as a galvanized steel plate instead of a colored steel plate. 4 is a leveler that adjusts the level of the color steel plate 02 to the following press machine. 6.8.10.12 is a press machine with four stages in series, each of which sprays press oil onto the steel plate before pressing, and then performs press forming. 14 is a press machine 6.8.
This is a transfer machine for moving steel plates between 10 and 12. 16 is another transfer machine,
This is for moving the steel plate that has been press-formed by the press machine 12 to the belt conveyor 18. The configuration up to this part is well known.

20 is a wiping tank for press oil, which is provided along the conveyor 18, and its configuration is shown in FIG. A heating tank 22 is used to re-harden the synthetic resin on the surface of the steel plate that has been damaged by press molding, and to remove distortion of the steel plate caused by press molding. An air cooling tank 24 cools the steel plate heated in the heating tank 22 to around room temperature, and an inspection table 26 is used for inspecting defective products. This inspection may be performed automatically using a sensor, or may be performed manually by an operator. Reference numeral 28 denotes a transfer means, the tip of which branches into two, and feeds the steel plate to either tip depending on the operating cycle. 30.32
are two tray conveyors, each connected to the tip of the transfer means 28. The conveyor 30.32 has a first feeding means for feeding an empty tray, a second feeding means for storing a steel plate and feeding a full tray, and a lifting mechanism for raising and lowering the tray stepwise. It consists of three elements of means. In the embodiment, the trays are stacked in two stages, with the first feeding means on the lower stage and the second feeding means on the upper stage, and the trays are conveyed from the first feeding means to the second feeding means by the lifting means. 04 is a tray.

34 is a control panel equipped with a timer and a counter.

The configuration of the wiping tank 20 is shown in FIG. 2. Wiping tank 2
0 is provided along the conveyor 18, 40 is a first arm, 42, 44 is a second arm, and 46 is a third arm. 48, 50, 52, and 54 are mops made of cloth, oil-absorbing paper, or the like, and are used as oil-absorbing members. 56.58, 60 are arms 40.42.4 respectively
4.46 driving means. Moreover, the color steel plate after press molding is shown as 06.

Each arm operates differently; in the first arm 40, the oil absorbing member 48 wipes the entire surface of the steel plate 06;
Move it in a rotational motion as shown by the arrow in the figure. In this rotational movement, the oil absorbing member 48 does not rotate relative to the tip of the arm 40, but the oil absorbing member 48 rotates together with the arm 40. Such movement of the arm 40 is
This can be achieved using a cam mechanism, etc. Second arm 42.44
The steel plate 06 is moved to intensively wipe the uneven portions thereof. Here, the unevenness of the steel plate 06 is shown as two protrusions 08. The arms 42 and 44 reciprocate along the protrusion 08 and intensively wipe off press oil accumulated behind the protrusion 08. The third arm 46 performs a simple reciprocating motion with respect to the steel plate 06, wiping the entire surface of the steel plate 06, and wiping off the remaining press oil with the eleventh second arm 40, 42, 44. Although the third arm 46 needs to be placed last, the order of the eleventh and second arms does not necessarily have to be in the order shown in the figure.

3 and 4, the tray conveyor 30, 32 will be explained. From the conveyor 18, the steel plate 06 is sent to a transfer means 28. The transfer means 28 is provided with a conveyor 62 whose direction of movement can be reversed back and forth. 64 is a turntable, which rotates the direction of the steel plate 06 by 90 degrees,
Make it easy to accommodate in tray 04. The tip of the transfer means 28 is 2
The steel plate 0 reaches the turntable 64.
6 is sent to the tip by a conveyor 66. 68 is a power source for the conveyor 62 and the like.

In FIG. 4, reference numeral 70 denotes a first feeding means, which has a built-in power roller and feeds an empty tray to the roller 78 of the elevating means 74. 72 is a second feeding means, and the first feeding means 7
The full tray 04 containing the steel plates 06 is taken from the roller 78 and sent out by a power roller.

An appropriate roller or the like may be placed at the exit of the second feeding means 72 to store the trays 04 until shipping.

74 is a lifting means, 76 is its frame, 78 is a power roller, 80 is a pawl for locking the tray 04, and 82 is a chain belt for raising and lowering the pawl 80. 84 is a step motor that connects the pawl 80 via the chain belt 82.
Move up and down one step at a time. Note that a large number of slits 08 are provided inside the tray 04, and one steel plate 06 is accommodated between the slits.

The operation of the device will be explained. The steel plate 06 after press forming is sent to a conveyor 18 by a transfer machine 16, and then sent to a wiping tank 20 on the conveyor 18. Wiping tank 2
Press oil is wiped off using three types of arms 40 to 46. In the first arm 40, the oil absorbing member 48 is attached to the steel plate 06.
The entire surface of the steel plate 06 is rotated to evenly spread the adhered press oil onto the steel plate 06, and a portion of the press oil is wiped off. Second
The arms 42 and 44 intensively wipe off press oil adhering to the protrusion 08. In the third arm 46, the steel plate 06
Wipe the entire surface of the press to remove any remaining press oil. The steel plate 06 from which the press oil has been wiped off is heat treated in the heating tank 22, and then
It is cooled in an air cooling tank 24 and defective products are removed on an inspection table 26.

The operation of the conveyor 30, 32 will be explained with reference to FIG. The timer of the control panel 34 is set in synchronization with the feeding speed of the steel plate o6, and the step motor 84 is operated every time the steel plate 06 is fed to raise the tray o4 one step at a time. As a result, the steel plates 06 sent from the transfer means 28 are accommodated one by one between the slits 08 of the tray 04. A counter in the control panel 34 counts the number of steel plates 06 sent to the tray 04, and when the tray 04 is full, the conveyor 6
Reverse the direction of 2. At the same time, a signal from the control panel 34 is used to switch between the two transport machines 30 and 32. In a conveying machine that accommodates a full tray 04, the second feeding means 7
2 is used to feed the tray 04, and the first feeding means 70 feeds the empty tray 04 to the elevating means 74. Further, the claw 80 is returned to the base position by quick return of the chain belt 82. At the same time, the conveying machine on the side that has been inactive until now is returned to the operating state, and the empty tray 04 is raised one step at a time to receive and pick up the steel plate 06 from the conveying means 28. By repeating this operation, the steel plates 06 are automatically accommodated in the tray 04 without interruption.

It goes without saying that the mechanical elements used in the examples are all well-known and can be modified as appropriate. Further, in the embodiment, sequential control is performed using a timer of the control panel 34, but feedback control may also be used in which the position of the steel plate 06 is monitored by a sensor and fed back. Furthermore, the tray 04 has one steel plate in the slit 08.
Although the steel plates are supported one by one, it is also possible to simply stack the steel plates.

[Effect of the Invention 1] In this invention, press oil is automatically removed after press forming of a surface-treated steel sheet. Here, three arms are used properly,
Wipe off the press oil so that no streaks of press oil remain on the steel plate, and no press oil remains on the uneven parts caused by press molding. Furthermore, the invention automates the loading of steel plates onto trays. Here, in particular, the two conveyors are operated alternately,
To enable loading work into a tray without play in the system.

[Brief explanation of the drawing]

FIG. 1 is a layout diagram of the embodiment, FIGS. 2 to 4 are enlarged layout diagrams of main parts of the embodiment, and FIG. 5 is a block diagram showing the control mechanism of the embodiment. In the figure, 18 conveyor, 20 wiping tank, 28 transfer means, 30.32 conveyor, 40 first arm, 42.44 second arm, 46 third arm, 48-54 oil absorbing member, 70 first Feeding means, 72 Second feeding means, 74 Lifting means. Figure Figure

Claims (1)

[Claims] (1) In a system in which a surface-treated steel plate coated with press oil is press-formed using a press machine, a conveyor is installed after the press machine to transport the steel plate after press-forming, and along the conveyor, At least three arms are provided with oil-absorbing members attached to wipe off press oil adhering to the steel plate, and the first arm has the oil-absorbing member attached to the entire surface of the steel plate.
A driving means is connected to the second arm for moving the oil absorbing member to wipe off press oil while rotating, and a drive means for moving the oil absorbing member to intensively wipe the uneven parts of the steel plate formed by press forming is connected to the second arm. , a driving means is connected to the third arm, and a driving means is connected to the third arm to move the oil absorbing member to wipe off press oil from the entire surface of the steel plate, and the end of the conveyor has at least two tips. branch,
and is connected to a steel plate transfer means that periodically switches the conveyance direction of the steel plate to at least two ends, and at least two tray conveyors are connected to the tips of the transfer means, and each The tray transport machine includes a lifting means for raising and lowering a tray for storing a plurality of steel plates at the tip of the transport means, a first feeding means for feeding an empty tray to the lifting means, and a first feeding means for transporting a full tray to the lifting means. A press system characterized by being provided with a second feeding means for feeding.