JPS609522A - Method and device for exchanging die used for c-pressforming of uo-pipe - Google Patents

Abstract

PURPOSE:To shorten the time necessary for die rearrangement to, mechanize operation, and to secure safety by setting quickly new and old dies to the exchanging position on a free roll by the actions of a die holder for two pairs of new and old dies and a parallel link interlocked with the holder. CONSTITUTION:An old die 2 positioned to a free roll or a driving roll 11 is transferred to the position where an mechanical handling machine such as a crane used for transferring and exchanging dies is placed while keeping the parallel posture by an old die holder and an arm 12 actuated by a parallel link 13 and is made ready. A preparation for attaching a new die 5 is finished by transferring the new die 5 to the free roll or driving one 11 bringing said die to the stand-by posture by driving a new die holder, an arm 15, and a parallel link 16 having the same transferring and stand-by mechanism and function as those of the old die 2 with the aid of a driving mechanism 17.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for replacing and recombining press stop dies and lower dies in a C press forming apparatus that is used in the forming process of steel sheets in the manufacturing process of UO steel pipes. .

The C press forming equipment is an essential process in the manufacturing method as the initial forming process for UO steel pipes, and its forming dies are exchanged and rearranged in left and right positions and pairs of upper and lower dies each time depending on the plate thickness and outer diameter of the steel pipe. It becomes necessary to do so.

When exchanging and rearranging the old and new molds, the conventional method and general method is to lift and support the upper and lower molds using a lifting device such as a chain block, and hold the molds in place while holding them.
A dummy steel plate is loaded into the press forming machine, a mold is loaded on the steel plate, and the mold is carried out of the C press forming machine using the driving force of a conveyor roller or the like or the wire traction force generated by a winch drive. On the other hand, when installing the cutting mold, the mold exchange and rearrangement is carried out by reversing the above-mentioned unloading procedure.

These conventional and general methods of recombination require specialization of heavy equipment such as cranes for setting up tools for removing molds, loading and unloading molds, and even transporting and exchanging old and new molds. The prolongation of element work time reduces production efficiency, and furthermore, it causes problems such as safety for rearranging workers.

The present invention was made for the purpose of shortening the mold change time of C press molding equipment and ensuring safety by mechanizing manual work.Examples of the present invention will be described below with reference to all the attached drawings.
The content of the method and apparatus of the present invention will be clarified by explaining its system and structure.

FIG. 1 is an overall plan view of the apparatus of the present invention. In FIG. 1, 1 is a plane showing the outer shape 1 of the C press molding apparatus, 2 is a plane showing the upper and lower molds in the C press, and the upper and lower molds are It is designed to be transported in and out as one unit. When replacing and rearranging the upper and lower molds 2, the upper and lower molds 2 are clamped to a fixed frame by the acting force of hydraulic pressure, etc., and are unclamped, and the upper mold is superimposed on the lower mold and fixed as one body with the main frame 1 of the C press. The lower mold holder is loaded at its highest limit on the built-in lifting roller, and preparations for transporting it out of the C-press molding apparatus are completed.

After the above preparatory work is completed,
An endless chain 7 capable of forward and reverse operation is actuated by a chain drive load 8, which is a main component of the present invention, as shown in the cross section of -A arrow view), and one upper and lower mold is attached to one end of the endless chain. The upper and lower molds 2 are pulled out to a predetermined position outside the C-press molding apparatus by interlocking a 6ft towing vehicle with four metal hooks that fit properly into the drawer hooks 3 of the upper and lower molds 2.

FIG. 2 is a partially enlarged view of FIG. 1, and in FIG. Conveyance roll 100 for the steel plate for forming the entire mold 2 pulled out by the claw 4
A free roll or drive roll 11 installed at the end of the roll and placed at the same height level as the mold 2 when it is pulled out.
By towing and loading the old and new molds on the machine, the new and old mold exchange recombination arm 1 shown in FIG. Perform position settings.

Figures 4 and 5 show the exchange method and structure of the old mold 2 and the cutting mold 5. While maintaining the horizontal position on the old mold holder and arm,
14 is used to move and wait from the free position shown in FIG. 5 or above the drive roll 11 to the handling position of heavy machinery such as a crane for transporting and exchanging molds shown in FIG. 4. The cutting die 5 has a mechanism and function similar to the moving standby of the old die 2, and a cutting die holder and an arm 15, and a fourth parallel link 16.
Free or drive roll 1 in Figure 5 from the state and position shown in the figure
1 is placed on standby by the driving device 17, and preparation for attaching the cutting die 5 is completed.

The pedestal arm 12.15 and the parallel link 13.16 for carrying the new and old molds for exchanging the old and new molds are arranged so that they do not interfere with each other during operation as shown in the second factor plane, and the fourth
As shown in Fig. 5, the pedestal arm 12.15 of the molds 2 and 5 by the parallel link 13.16 remains in a horizontal position, and the movement lines of the molds in their swivel operation do not intersect. Due to the mechanism arrangement, when replacing these old and new molds, cutting mold 5
This allows for preparation and setting in advance while the C press molding equipment is in operation.

The cutting mold 5 pulls out the old mold 2 from the C press molding device,
After being moved to the handling position for heavy transportation equipment such as a crane as shown in FIG. 4, it is immediately moved or set for movement on the drive roll 11 for rapid mold exchange. Further, the cutting die 5 on the free or driving roll 11 is connected to the endless chain 7 and the chain drive device 8 after the hook 3 integrated into the towing vehicle 6 shown in FIG.
The mold is loaded into the C press molding apparatus, and a series of operations for mold exchange and rearrangement is completed.

The apparatus of the present invention is installed on both wings of the C press forming apparatus in the flow direction of the steel plate, as shown in FIG.
To enable simultaneous, simple and quick mold exchange and rearrangement of old and new molds in a set.

[Brief explanation of the drawing]

FIG. 1 is an overall plan view of the device of the present invention, FIG. 2 is a partially enlarged view of FIG.
Figure 5 shows a mold that is part of the device of the present invention ■...C press;
2... Upper and lower molds, 3... Hooks, 4... Hook claws,
5... Cutting die, 6... Towing vehicle, 7... Endless chain, 8.° chain drive device, 9...
Frame, 10... Conveyance roll, 11... Free roll or drive roll, 12.15... Mold pedestal,
13.16...Parallel link, 14.17...Link drive cylinder. Agent: Patent attorney Tomoyuki Yafuki and 1 other person Figure 2 Figure 3 1

Claims (1)

[Claims] 1. In the method of exchanging old and new molds when recombining C press forming equipment in UO steel pipe manufacturing 1 (in A free roller or drive roll is provided that matches the mold position and height level, and above the roll is a traction vehicle K that is driven via an endless chain along a guide rail frame.
Then, hook the hook provided on the towing vehicle to the mold drawer hook installed at one end of the upper and lower molds at the left and right positions in the unclamped state in the C press. The new and old molds have a machine S that pulls out the molds onto the driving rolls, and also prevents the two-dimensional arrangement positions of molds at the same position from interfering with each other, and the lifting movement lines of the old and new molds do not intersect alternately. By the action of two sets of mold holders and parallel links interlocking with them, it is possible to quickly set the new and old molds on the free roll while maintaining the mold posture horizontally, and the endless chain A mold exchange method for C press forming of UO steel pipes that enables the mold to be fed into the C press forming apparatus by the catch claw of a towing vehicle driven by. 2. At both ends of the steel pipe conveying roller of the C press forming machine,
A free roll or a driving roll is provided that matches the mold position height level in the unclamped state, and a mold pulling vehicle is provided above the roll to be driven via an endless chain along a guide rail frame. On both sides of the conveyance roller, in order to exchange old and new molds, there are two sets of recombination arms that can horizontally move the molds on the free roll or drive roll through a link mechanism and a mold holder using one cylinder. A mold changing device for C press forming of UO steel pipe, characterized by the following: