JPH0333046B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a press forming line for punching molded products with a higher yield than coiled materials.

BACKGROUND ART Conventionally, when punching a molded product such as a top and bottom plate of a drum from a coil material using a press forming line, a method of punching the coil material in one row and a method of punching out the coil material in multiple rows are generally adopted.

The former method of punching the coil material in a row has poor working efficiency when trying to obtain a large number of molded products, and also has poor fractionation of the molded product from the coil material.
It is rarely used except when producing small quantities of molded products or large diameter molded products.

On the other hand, the latter method of punching out molded products in multiple rows from coil material is suitable for mass production of molded products, and by punching out molded products in a staggered manner, the yield of molded products is also lower than that of coil material. Although it is currently widely used because it improves performance, it also has the following problems.

Problems to be Solved by the Invention Namely, when a molded product is punched out from a coil material in a staggered manner, a part of the coil material expands and contracts, causing meandering during feeding, resulting in unstable feeding of the coil material.

For this reason, in the past, the sun width was determined with a margin in advance to prevent defective products even if the coil material meandered, which caused a decrease in yield.

This invention was made for the purpose of improving the above-mentioned problems.

Means and operation for solving the problem In a press forming line where molded products are punched out in a staggered manner from a coil material conveyed on the press forming line, a press machine is arranged for each row of the molded products, and each A tension roll device is provided between the press machines to apply appropriate tension to the coil material to be punched and to correct meandering, and a width strip is installed on the entrance side of the tension roll device to position the coil material in the width direction. The coil material is positioned in the longitudinal direction by inserting a guide into the punched hole in the coil material near the width guide and inscribing the pilot pins in the punched hole. A positioning device is provided, and while the width guide and positioning device position the punching position of the coil material 1 to the processing position of the press machine, each press machine punches a molded product from the coil material in a staggered manner, and each press The molded product punched out by the machine is transported out using a separate conveyance means.

Embodiment The present invention will be described in detail with reference to an illustrated embodiment.

1 and 2 show a press forming line for simultaneously punching out top and bottom plates for use in drum cans, and numeral 1 indicates a coil material carried into a supply position by a coil car 2.

The coil material 1 is carried by an uncoiler 3 to a leveler 4 provided on the line, and after the curling of the coil material 1 is corrected, it is sent to a loop control device 6 via a loop table 5, where it is always kept in a constant amount. After the feeding amount is controlled so that a loop occurs, the material is fed to a roll feeder 7 that employs a numerical control method.

The roll feeder 7 feeds the coil material 1 intermittently to two press machines 8 and 9.
The rising speed of the feed roller 10 is adjusted so that the molded product punched and simultaneously drawn from the coil material 1 by these press machines 8 and 9 is discharged without a shock.
In order to ensure high speed and accurate minimum width after discharging the molded product, the feed rate and other factors are now numerically controlled.

On the other hand, the two press machines 8 and 9 mentioned above are two-point C frame press machines so that they can be applied to wide coil materials 1, and each row has 1 coil material 1.
They are placed facing each other with their positions shifted in the width direction and feed direction of the coil material 1 so that the molded product can be punched through easily.

The coil material 1 that is intermittently fed by the roll feeder 7 is introduced into the entrance guide table 11 from the rear opening 8a of one of the presses 8 installed on the upstream side.
When the scrap material reaches the processing position, it is fed from the rear opening 9a of the press 9 installed downstream, through the exit guide table 12, and into the coil end feed roll device 13.

On the other hand, a tension roll device 15 as shown in FIGS. 4 and 5 is installed between each of the press machines 8 and 9. As shown in FIGS.

The tension roll device 15 includes a coil material 1
It has a pair of tension rolls 16 and 17 which are inserted from above and below to apply a constant tension to the coil material 1 punched by the presses 8 and 9. The tension roll 16 located on the lower side is intermittently rotated by an electric motor 18 via a chain 19, and
Rotating shaft 1 of tension roll 17 located on the upper side
Both ends of 7a are supported by swing levers 20, and by swinging the swing levers 20 by a diaphragm cylinder 21, the upper tension roll 17 is crimped onto the coil material 1 with a constant pressure. There is.

Further, each of the tension rolls 16 and 17 is supported by the main body 15b of the tension roll device 15 via a support plate 15a, and the support plate 1
Meandering correction bolts 22 are screwed into 5a at four locations, for example. The tip of each meandering correction bolt 22 is in contact with a part of the main body 15b, and by rotating these meandering correction bolts 22 alternately, the mounting position of the support plate 15a with respect to the main body 15b can be adjusted. As a result, the angle of the axis of each of the tension rolls 16 and 17 can be adjusted in the conveying direction of the coil material 1.

That is, when the coil material 1 meanderes, by adjusting the angle of each of the tension rolls 16 and 17, the meandering of the coil material 1 can be corrected, and
The adjusted position can be fixed by tightening a lock nut (not shown) provided on the meandering correction bolt 22.

On the other hand, a width guide 23 is provided on the inlet side of the tension roll device 15 to define the position in the width direction of the coil material 1 fed into the tension roll device, and a press in the vicinity and downstream of this width guide 23 is provided. Positioning devices 25 are installed at two locations near the processing position of the machine 9 to accurately position the punching position of the coil material 1 to the processing positions of the respective presses 8 and 9.

The positioning device 25 has four pilot pins 26 that enter from below into the punched holes 1a of the coil material 1 punched out by the press machine 8 on the upstream side. These pilot pins 26 are attached to the tip of a piston rod 28b of an air cylinder 28 having a piston 28a urged downward by a return spring 27, and are raised by air supplied to the air cylinder 28. . Then, the position of the coil material 1 is corrected by contacting the inner periphery of the punched hole 1a of the coil material 1 from four sides as shown in FIG.
The machine is positioned at the machining position.

On the other hand, each of the press machines 8 and 9 includes a mold 8b that punches the coil material 1 and simultaneously draws it into a predetermined shape.
9b.

Note that when punching and drawing the coil material 1, first one side of the coil material 1 is punched out using a press machine 9 on the downstream side, and then the remaining side is punched out using a press machine 8 on the upstream side. .

This is to reduce the influence of partial expansion and contraction of the coil material 1 caused by punching.

The molded product punched from the coil material 1 by each of the press machines 8 and 9 is dropped through a chute 35 to the lower part of the press machines 8 and 9, and is then carried out by a conveying means 36 as shown in FIG. At the same time, the scrap material 1b is sent from the exit guide table 12 to the coil end feed roll device 13.

The coil end feed roll device 13 is for preventing humping of the scrap material 1b fed in and smoothly feeding it to the scrap cutter 30.
b is cut in a direction perpendicular to the feeding direction of the coil material 1, resulting in the form shown in FIG.

Then, this scrap material 1b is sent to a scrap cutter 32 by a conveying means 31 such as a conveyor arranged in a direction perpendicular to the feeding direction of the coil material 1, and is further cut into small pieces by this scrap cutter 32 in the direction of the broken line in FIG. It will be collected after being removed.

Although the above-mentioned embodiments have been described with respect to the case of molding the top and bottom plates of drums, the present invention is not limited thereto and can be applied to punching of various molded products.

Effects of the Invention As described in detail above, this invention punches coil material in a staggered pattern using multiple presses installed in each row. Compared to punching, it is more economical as it can punch relatively large molded products using a small press machine.

In addition, while applying tension to the coil material using a tension roll device, the positioning device consisting of a width guide and a plurality of pilot pins positions the coil material in the width direction and longitudinal direction, and the coil material is punched out using each press machine. Because of this, the coil material can be punched out with the minimum width, thereby improving the material yield by about 6%.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a plan view of the press forming line, Fig. 2 is a side view of the same, Fig. 3 is a view taken from the direction of Fig. 1, and Fig. 4 is a tension Detailed view of the roll device, Figure 5 is an enlarged view of the same,
Fig. 6 is a plan view showing the positional relationship between each press machine and the positioning device, Fig. 7 is a schematic diagram of the positioning device, Fig. 8 is an explanatory diagram showing the delivery of the punched molded product, and Fig. 9 is a diagram showing the removal of the punched molded product. It is an explanatory diagram. 1 is a coil material, 8 and 9 are press machines, and 15 is a tension roll device.

Claims (1)

[Claims] 1 Coil material 1 being conveyed on the press forming line
In a press forming line that punches molded products in a more staggered manner, press machines 8 and 9 are arranged for each row of the molded products, and between each press machine 8 and 9 a machine suitable for the coil material 1 to be punched is placed. A tension roll device 15 for applying tension and correcting meandering is provided, and a width guide 23 for positioning the coil material 1 in the width direction is provided on the entrance side of the tension roll device 15.
In the vicinity of this width guide 23, a plurality of pilot pins 26 are inserted into the punched holes 1a of the punched coil material 1, and these pilot pins 26 are inscribed in the punched holes 1a. A positioning device 25 for positioning is provided, and while the width guide 23 and the positioning device 25 position the punching position of the coil material 1 to the processing position of the press machines 8 and 9, the coil material is 1. A press molding line characterized in that molded products are punched out in a staggered manner from the presses 8 and 9, and the molded products punched out by the respective presses 8 and 9 are conveyed out by a separate conveying means 36.