JPH0469013B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for exchanging and rearranging press upper dies and lower dies in a C press forming apparatus during the steel plate forming process in the UO steel pipe manufacturing process.

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

When replacing 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 while maintaining the position of the molds, a dummy is placed inside the C press molding machine. A steel plate for molding is loaded, a mold is loaded on the steel plate, and the mold is transported out of the C press forming equipment using the driving force of a conveyor roll or the wire traction force driven by a winch, and conversely, the mold is transported out of the C press molding equipment. When installing molds, mold replacement and rearrangement is carried out by reversing the above-mentioned unloading procedure.

These conventional and common methods of recombination are:
It is necessary to use heavy machinery such as a crane for the purpose of setting up mold removal tools, loading and unloading molds, and even transporting and exchanging old and new molds, which reduces production efficiency by prolonging the work time for these recombination elements. This is causing problems such as safety for rearrangement 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 based on the accompanying drawings, and the system, The description of the structure will clarify the content of the method and apparatus of the present invention.

FIG. 1 is an overall plan view of the apparatus of the present invention. In FIG. 1, 1 is a plane representing the external shape of the C press molding apparatus, and 2 is a plane showing the upper and lower molds in the C press. It is designed to be carried 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 hydraulic pressure or other acting force, and are unclamped, and the upper mold is superimposed on the lower mold to form one unit with the main frame 1 of the C press. Loaded at the highest limit of the lifting roller built into the fixed lower mold holder, C
Preparations to be carried out of the press molding equipment are now complete.

A plurality of conveyance rolls 10 for conveying the steel plate to be formed are arranged on the front side of the C press forming apparatus,
A certain range of the conveyance line constituted by the conveyance roll 10 near the molding device serves as a mold exchange/rearrangement space. A free roll or drive roll 11 is coaxially provided at both ends of each of the transport rolls 10 in this range, and the roll surface of the roll 11 matches the mold position and height level in the unclamped state.

In addition, as shown in FIGS. 1 and 3, above the free roll or drive roll 11,
A guide rail frame 9 of a certain length is installed along the mold drawing direction, and a tractor 6 is movably provided on the rail frame 9. The guide rail frame 9 is held in its entirety by a suspension frame 19A that suspends both ends of the guide rail frame 9 and intersects with the mold drawing direction, and a support frame 19B that supports the suspension frame. Furthermore, as shown in FIG. 3, the towing vehicle 6 is driven by pulling an endless chain 7 fixed to the towing vehicle 6 by a chain drive device 8 placed on a suspension frame 19A. In addition, in FIG. 1, 18 is a drive device when the roll 11 is used as a drive roll.

After the above preparatory work is completed, forward and reverse operation is performed by the chain drive device 8, which is the main component of the present invention, as shown in the cross section of FIG. Operate the possible endless chain 7 and place one upper and lower mold 2 at one end of the endless chain.
A hook 4 that fits properly into the drawer hook 3 of
A towing vehicle 6 holding a C-press molding device is linked to pull out the upper and lower molds 2 to a predetermined position outside the C-press molding device. FIG. 2 is a partially enlarged view of FIG. 1. In FIG. 2, the arrangement of the upper and lower molds 2 in a state of being pulled out of the C press molding apparatus is shown, and the above-mentioned towing vehicle 6
The mold 2, which is pulled out by the hook 4, is placed at the end of the conveying roll 10 for forming steel sheets, and is placed on a free roll or drive roll 11 that is placed at the same height level as the mold 2 when it is pulled out. If it is possible to mechanically and automatically exchange and change the position of the old mold 2 and the new mold 5 using the new and old mold exchange recombination arm shown in Fig. 4 by towing and loading the old mold 5 on the Set the closing position.

Figures 4 and 5 show how to replace old mold 2 and new mold 5.
This shows the structure. The old mold 2, which is positioned on a free roll or a driving roll 11, is moved by 12 old mold holders and arms by the operation of a parallel link 13.
While maintaining the horizontal position, the free or drive roll 11 in FIG.
From above, the machine is moved to the position where heavy equipment such as a crane for transporting and exchanging molds is handled, as shown in Figure 4. The new mold 5 has a new mold holder and an arm 15 having the same mechanism and function as the old mold 2 that is on standby, and is moved from the state and position shown in FIG. The new mold 5 is placed on standby by a drive device 17 on the drive roll 11, and preparations for mounting the new mold 5 are completed.

The pedestal arms 12, 15 and the parallel links 13, 16 for carrying the new and old molds for exchanging the old and new molds are arranged alternately as shown in the plane of FIG. As shown in Figure 5, 1
The pedestal arms 12 and 15 of the molds 2 and 5 by parallel links 3 and 16 remain in a horizontal position, and the movement lines of the respective molds in their swiveling motion do not intersect. New mold 5 for replacement
It is possible to prepare and set the C-press molding equipment in advance while the press molding equipment is in operation.

The new mold 5 pulls out the old mold 2 from the C press molding device, moves it to the position where heavy transportation equipment such as a crane is handled, as shown in Fig. 4, waits for it, and then immediately moves it or sets it on the drive roll 11 for quick mold replacement. to be carried out. Furthermore, the new mold 5 on the free or drive roll 11 is attached to the towing vehicle 6 in FIG.
After the formed hook 4 and the hook 3 at the end of the mold are fitted, the mold is inserted into the C press molding machine by the endless chain 7 and the chain drive device 8, and a series of work operations for mold replacement and rearrangement are carried out. Complete.

As shown in Fig. 1, the device of the present invention is installed on both wings of the C-press forming device in the flow direction of the steel plate, making it possible to simultaneously, easily and quickly replace and rearrange old and new molds in a pair of upper and lower molds and two sets of left and right molds. Get used to it.

[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. 1, Fig. 3 is a sectional view taken along the line A-A in Fig. 1, and Figs. It is a figure which shows the mold recombination arm which is a part. 1... C press, 2... Upper and lower molds, 3... Hook, 4... Hook, 5... New mold, 6... Traction vehicle, 7... Endless chain, 8... Chain drive device, 9... Guide rail frame, 10...
... Conveyance roll, 11 ... Free roll or drive roll, 12, 15 ... Mold holder, 13, 16 ...
... Parallel link, 14, 17 ... Link drive cylinder, 18 ... Drive device, 19A ... Suspension frame, 19B ... Support frame.

Claims (1)

[Claims] 1 In a method of exchanging old and new molds when recombining C press forming equipment in UO exchange manufacturing, a mold position in an unclamped state and a high A free roll or drive roll is installed that matches the level of the C-press, and a traction vehicle is installed above the roll to drive it through an endless chain along a guide rail frame. The hook provided on the towing vehicle is hooked to the mold drawer hook installed at one end of the upper and lower molding molds at each position, and the mold is pulled out onto the free roll or drive roll, and then the same Two sets of mold holders for the new and old molds and parallel parallel molds linked to them have a mechanism that prevents the two-dimensional arrangement of the molds from interfering with each other and the lifting movement lines of the old and new molds do not intersect alternately. By the action of the link, it is possible to quickly set the new and old molds on the free roll or drive roll while maintaining the mold posture horizontally, and the hooking claw of the tractor driven by the endless chain allows the new and old molds to be quickly set on the free roll or drive roll. A mold exchange method for C press forming of UO steel pipes that enables the mold to be fed into the C press forming equipment. 2. At both ends of the steel plate conveying roll of the C press forming device, provide free rolls or drive rolls that match the mold position and height level in the unclamped state,
A traction vehicle is installed above the roll and driven via an endless chain along the guide rail frame, and a link mechanism and a mold holder are installed on both sides of the transport roll by means of cylinders in order to exchange old and new molds. A mold changing device for C press forming of UO steel pipes, characterized in that two sets of recombinant arms are provided to horizontally move the molds on the free roll or the drive roll via a stand.