JPH09174142A - Stem fixing device in extrusion press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the stem fixing device capable of simply executing mounting/demounting by moving a stem in the vertical for the pressure plate direction. SOLUTION: A guide ring and plural cylinder devices 5 are mounted to the tip of a pressure plate 1 mounted to a cross head 2, a fitting groove 11, which is at the rear end of a stem 6 having a flange part 8 and in which a guide ring is fitted in the direction orthogonally crossing to the axial center, is arranged, the inner faces of locking plates 12, 13 having an opening part S, in which the stem can pass, are abutted on the cylinder device and the flange part of stem, further, the lock plates 12, 13 and pressure plate 1 are fastened by a bolt 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stem fixing device in an extrusion press, and more particularly to a stem fixing device in an extrusion press for fixing the stem to a crosshead easily in the extrusion press.

[0002]

2. Description of the Related Art Generally, when a stem is attached to a crosshead in an extrusion press, the stem is inserted into the crosshead ring and is slidable in the axial direction between the rear end taper of the stem and the crosshead ring. The holder ring is inserted, the crosshead ring and the crosshead are fastened together by a large number of bolts, and the stem holder ring is fixed to the crosshead by the pressing force of the stem holder ring generated at this time.

However, in the stem fixing device in such an extrusion press, when the stem is attached or detached, it is necessary to tighten or remove a large number of bolts, which is troublesome. Due to such technical problems, the inner hole of the stem holder ring is formed in a non-circular shape, and the stem holder ring is made rotatable.
A flange portion that passes through the inner hole of the stem holder ring and cannot pass when the stem holder ring is rotated is provided at the rear end of the stem. A stem fixing device in an extrusion press provided with a jack for moving in a separating direction has been proposed (for example, JP-A-3-169426).
issue).

[0004]

However, in the stem fixing device in the extrusion press as described above,
When attaching or detaching the stem, it is necessary to rotate the stem holder ring, and it is necessary to move the rear end of the stem in the axial direction and insert or pull it out into the cross head ring and the stem holder ring. The work of attaching and detaching the stem is troublesome.

[0005]

The present invention has been made to solve the above-mentioned conventional problems, and a guide ring 3 is provided at the tip of a pressure plate 1 attached to a crosshead 2. A plurality of cylinder devices 5 are attached, a fitting groove 11 into which the guide ring 3 is fitted is provided at the rear end of the stem 6 having the flange portion 8 and in a direction orthogonal to the axis, and the stem 3 can pass through. The inner surfaces of the lock plates 12, 13, 14 having the open portions S are brought into contact with the cylinder device and the flange portion of the stem, and the lock plates 12, 13, 14 and the pressure plate 1 are fastened with bolts 15. The present invention provides a stem fixing device for an extrusion press as described above.

Preferably, the guide ring 3 attached to the tip of the pressure plate 1 is detachable, and its axis is arranged to be the same as the axis of the extrusion press. Further, the fitting groove 11 provided at the rear end of the stem is configured to extend from the peripheral edge of the rear end of the stem 6 to the shaft center. The lock plate that transmits the pressing force to the flange portion 8 of the stem 6 is composed of a first lock plate 12 and a second lock plate 13, or a lock plate 14 whose side surface forms a U-shape, It is preferable that the stems 6 are arranged so as to have a predetermined distance from each other about the axis of the stem 6.

In the stem fixing device in the extrusion press having such a constitution, when the stem is to be removed now, the pressure fluid is applied to the cylinder to slightly move the lock plate against the pressing force of the bolt, and the flange portion of the stem is moved. Release the tightening force of. After that, by moving the stem in a direction in which the fitting groove extends with a crane or the like, the stem is removed from the guide ring fitted in the fitting groove, so that the stem can be removed. Of course, when mounting the stem, the reverse procedure to the above is taken.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a stem fixing device in an extrusion press according to the present invention will be described below with reference to FIGS. 1 is a side view of a stem fixing device in an extrusion press according to the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG.
2 is a sectional view taken along line BB of FIG.

In these figures, 1 is a crosshead 2
The guide plate 3 is detachably attached to the tip of the pressure plate 1 by means of bolts 4. The axis of the guide ring 3 is arranged to be the same as the axis of the extrusion press. Further, at the tip of the pressure plate 1, for example, a plurality of cylinder devices 5 on which pressure fluid such as hydraulic pressure acts are provided. Reference numeral 6 denotes a stem, and a taper portion 7 and a square flange portion 8 are provided at a rear end portion of the stem 6, and the flange portion 8
A hoisting jig 10 is attached by a bolt 9.

Reference numeral 11 denotes a fitting groove formed on the end face of the flam portion 8. The fitting groove 11 is formed so as to extend through the flange portion 8 to the shaft center C, and the width W thereof is a guide ring. The diameter is slightly larger than the diameter of 3. Reference numeral 12 is a first lock plate, which is parallel to the first lock plate 12 at a predetermined distance from the second lock plate 12.
The lock plate 13 of is arranged.

That is, the lock plates 12 and 13 are arranged on the left and right with the axis of the stem 6 as the center, and an open portion S is formed. More specifically, this first lock plate 12
The second lock plate 13 is provided with a plurality of bolt holes 16 (three in the illustrated example) for inserting the bolts 15, and a plurality of bolt holes 16 (four in the illustrated example are provided between the bolt holes 16). ) The cylinder device 5 includes the lock plates 12, 1
It is configured to abut the surface of No. 3. Then, the flange portion 8 of the stem 6 is pressed by the step portion formed inside the lock plates 12 and 13.

In such a structure, the bolt 15 is now
When the first lock plate 12 and the second lock plate 13 are fixed so as to be pressed against the flange portion 8 of the stem 6, the cylinder device 5 is operated to resist the tightening force F of the bolt 15. Give force P. Then
First lock plate 12 and second lock plate 1
A small gap L (FIG. 3) is generated between the pressure plate 3 and the pressure plate 1. Therefore, the stem 6 is lifted by hanging a hanging rope of a crane or the like on the hoisting jig 10. At this time, the guide ring 3 is disengaged from the fitting groove 11, so that the stem 6 can be removed from the crosshead 2.

The lock plate is composed of the first lock plate 12 and the second lock plate 13 as described above, and is arranged in the vertical direction, that is, in the left-right direction to form the open portion S. This may be arranged, for example, in the vertical direction, and the stem 6 may be moved in the horizontal direction to be removed. The lock plate may be a U-shaped integrally formed lock plate 14 having an opening S in a part thereof as shown in FIG. 4, and the lock plate 14 is arranged so that the opening S is located at the upper part. Other than that, they may be arranged so as to be located on the left and right or at the bottom, if necessary.

[0014]

As is apparent from the above description, according to the stem fixing device in the extrusion press of the present invention, the guide ring is attached to the pressure plate attached to the crosshead, and the stem having the flange portion is attached to the rear end of the stem. A fitting groove into which the guide ring is fitted is provided in a direction orthogonal to the axis, and the inner surface of the lock plate having an opening through which the stem can pass is brought into contact with the cylinder device and the flange of the stem, and the lock plate Since the structure in which the pressure plate and the pressure plate are tightened and fixed by bolts, a small gap is created between the lock plate and the pressure plate by applying a pressure fluid to the cylinder, so that the stem only moves in the direction orthogonal to the axis. It can be removed with. Therefore, the work of attaching and detaching the stem to and from the crosshead becomes quick and easy, and as a result, the work efficiency can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a front view of a stem fixing device in an extrusion plate according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a front view of another embodiment of the stem fixing device in the extrusion press according to the present invention.

[Explanation of symbols]

1 Pressure plate 2 Crosshead 3 Guide ring 4, 9, 15
Bolt 5 Cylinder 6 Stem 7 Tapered part 8 Flange part 10 Lifting jig 11 Fitting groove 12 First lock pin 13 Second lock pin 14 Lock plate 16 Bolt hole

Claims (6)

[Claims] 1. A guide ring and a plurality of cylinder devices are attached to a tip of a pressure plate attached to a crosshead, and the guide ring is fitted in a rear end of a stem having a flange portion and in a direction orthogonal to an axis. A fitting groove is provided, and the inner surface of the lock plate having an open portion through which the stem can pass is brought into contact with the flange portion of the stem of the cylinder device, and the lock plate and the pressure plate are fastened by bolts. A stem fixing device in an extrusion press, which is characterized in that 2. The guide ring according to claim 1, wherein the guide ring is attached to the tip of the pressure plate such that at least the axis of the pressure plate is the same as the axis of the extrusion press. 3. The guide ring according to claim 1, which is detachably attached to the tip of the pressure plate. 4. The fitting groove according to claim 1, which is formed so as to extend from the peripheral edge of the rear end of the stem to the shaft center. 5. The lock plate according to claim 1, which comprises a first lock plate and a second lock plate which are arranged on the left and right sides or above and below the axis of the stem. 6. The lock plate according to claim 1, wherein the side surface is U-shaped.