JPH0139853B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Related Industrial Field] The present invention relates to a material positioning device for an upsetter used to form a thick walled portion at the end of a steel pipe.

[Prior Art] First, the overall structure of the upsetter will be outlined with reference to FIGS. 6 and 7, and then the present invention will be explained.

1 is a fixed die, and 2 is a movable die, which are respectively attached to the right front bed 3 and the sliding portion of a grip slide 11, which will be described later. The left and right front beds 3 and 4 have tie rods 5 and 5 for the front and rear two.
6, 6, and further tightened to the rear bed 7 by a tie rod 8.

9 is a punch, and 9a is a mandrel which can be moved back and forth by a heading slide 10. A grip slide 11 moves the movable die 2 relative to the fixed die 1 and grips the raw tube inserted between the two dies. The grip slide 11 is driven by a drive mechanism such as a crankshaft, a toggle operating cam 14, and a toggle slide. Note that 14a is a toggle return cam.

In the above configuration, the fixed die 1 and the movable die 2
The end of the raw pipe is swung by gripping the raw pipe inserted between the two and pushing the punch 9 into the end of the raw pipe using the heading slide 10.

In such an upsetter, a material positioning device is provided to position the blank tube inserted between the fixed die 1 and the movable die 2 at an optimal position for upsetting.

In the past, this type of material positioning device typically used a rigid stopper operated by an air cylinder. The position of this stopper is electrically detected and a drive device interlocked therewith is operated.

For this reason, there was a drawback that there was idle time in terms of cycle time, and the work of upsetting the end of the raw tube could not be carried out efficiently.

As a solution to this drawback, it has been proposed that
As shown in Japanese Patent Publication No. 55-126338, it is known that a positioning stopper is made to appear and disappear in conjunction with the forward and backward movement of the mandrel. Since the stopper and the mandrel are in sliding contact with the mandrel, both the stopper and the mandrel are easily damaged and have the disadvantage that they must be replaced after a short period of operation.

[Problems to be Solved by the Invention] The present invention has been made to solve these conventional problems. The main purpose is to shorten the cycle time by linking the grip motion with the grip motion.

[Means for solving the problem] A hydraulic cylinder is installed horizontally through a support at the upper end of the front bed near the end of the stroke of a heading slide that can move back and forth provided in the upsetter, and a material loading path is installed out of phase with the hydraulic cylinder. A shaft is provided along the direction that crosses the
The shaft includes a stopper guide that is interlocked with the hydraulic cylinder and is slidably supported;
A stopper guide pushing spacer interlocked with the grip slide and interposed between the sliding members of the stopper guide is fitted, and the stopper guide has a mandrel passage window and a stopper plate extending along the longitudinal direction of the shaft. They are characterized in that they are arranged in parallel in this order from the grip slide side.

[Embodiments of the Invention] The embodiments shown in FIGS. 1 to 5 will be described below. The upsetter material positioning device applied to the present invention includes a hydraulic cylinder 23 horizontally installed via a support 22 on a front bed 21 near the stroke end of a heading slide that can move back and forth, and a hydraulic cylinder 23 that is slightly connected to the hydraulic cylinder 23. A shaft 24 is provided which extends in a direction transverse to the material carrying-in path with a phase shift between the two, and a stopper guide 25 that is slidably fitted is supported on the shaft 24. A spacer 27 is movably fitted between the sliding members 25' of the stopper guide 25 and can come into contact with the die mounting portion on the grip slide 26. Furthermore, the stopper guide 25 is interlocked with the hydraulic cylinder 23 by a detachable connecting pin 28 via an arm 25a projecting from the side of the sliding member 25'.

The lower end of the stopper guide 25 is slidably supported by a stopper receiver 30 erected on the frame 29, and a mandrel passage window 31 is formed open on the side surface of the stopper guide. ) has a removable stopper plate 32 attached by a fixing pin 33.

The attached drawing shows a stopper guide 25 for 2 shots, but this is for 1 shot or 3 shots.
Even if it is used for more than one shot, the basic structure is the same regardless of the number of shots.

[Operation of the invention] When the stopper guide 25 is located at the dashed-dotted line position A in FIG. 1 by operating the hydraulic cylinder 23,
The material is positioned by the stopper plate 32, and during molding, the stopper guide 25 contacts and interlocks with the grip slide 26 via the spacer 27, and is slid to the position B shown in solid line. is applied to the end of the blank tube through the window hole 31 of the stopper guide 25. When it is at the solid line position B, it is in the stopper removal mode, and conversely, when it is at the dashed line A, it is in the stopper installation mode.

The stopper mounting mode can be set to the stopper mounting mode by extending the hydraulic cylinder 23 within the time required for mold cooling and lubrication after upsetting, and even if the hydraulic cylinder 23 is used for pushing back, there is no loss in cycle time. No need to think about time.

Further, the stopper plate 32 can be easily replaced by first removing the fixing pin 33 and then pulling out the stopper plate 32 laterally. At that time, the stopping position can be adjusted by preparing ones with different thicknesses.

Furthermore, when replacing the die, remove the connecting pin 28 between the hydraulic cylinder 23 and the stopper guide 25,
After that, the shaft 24 and the stopper guide 25
After hoisting and moving to the appropriate location,
After the die is replaced, the hydraulic cylinder 23 and the stopper guide 25 are connected as before by the reverse operation to the above, thereby completing the preparation operation for upsetting the end of the raw pipe. .

[Effects of the Invention] This invention has the configuration as described above, and since the stopper removal mode of the stopper guide is obtained in conjunction with the grip motion of the grip slide 26, electrical idle time is not generated. There is no such problem, and therefore, the end portion of the raw pipe can be swaged efficiently, and the stopper guide is not damaged, and the positioning of the raw pipe can be performed with high accuracy over a long period of time, which has tremendous effects.

[Brief explanation of drawings]

Fig. 1 is a front view of the material positioning device according to the present invention, Fig. 2 is a side view, Fig. 3 is a plan view, Fig. 4 is a front view of the stopper guide, and Fig. 5 is the V of Fig. 4.
6 is a schematic plan view of the upsetter, and FIG. 7 is a sectional view taken along the - arrow in FIG. 6. 3, 4, 21...Front bed, 22...Support, 23...Hydraulic cylinder, 24...Shaft, 25...Stopper guide, 25a...Arm, 11, 26...Grip slide, 27...
... Spacer, 28 ... Connection pin, 29 ... Frame, 30 ... Stopper receiver, 31 ... Window, 32 ...
...stopper plate, 33...fixing pin.

Claims (1)

[Claims] 1. A hydraulic cylinder installed horizontally via a support at the upper end of the front bed near the end of the stroke of a heading slide that can move back and forth provided in the upsetter, and The shaft is provided with a stopper guide that is interlocked with the hydraulic cylinder and is slidably supported, and a stopper guide that is interlocked with the grip slide and interposed between the sliding members of the stopper guide. a spacer for pushing a par guide, and a mandrel passage window and a stopper plate are arranged in parallel in this order from the grip slide side in the longitudinal direction of the shaft in the stopper guide. material positioning device.