JPS6335342B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an upsetter for upsetting the head of a long material such as a steel material, and more specifically, the present invention relates to an upsetter for upsetting the head of a long material such as steel, and more specifically, the present invention relates to an upsetter for upsetting the head of a long material such as a steel material, and more specifically, the present invention relates to an upsetter for upsetting the head of a long material such as a steel material. The present invention relates to the provision of a new upsetter which can take up a large space for replacing molds and facilitates the work of replacing the molds.

Upsetters for upsetting pipes and other materials include vertical upsetters in which the mold is split vertically, and horizontal upsetters in which the mold is split horizontally.

It is known that horizontal upsetters are more advantageous than vertical upsetters in conveying materials and assembling and removing molds and the like.

However, even with horizontal upsetters, there is a limit to how far the gripping tongue can be opened, and when replacing the mold with a mold that matches a different shape or material, or for maintenance and inspection of the mold, it takes considerable work. It is difficult because it involves heavy physical labor, and it becomes even more difficult because the work space is narrow, which can lead to errors in assembly accuracy, resulting in not only poor product quality but also a decrease in productivity. become.

The present invention was devised in view of the above-mentioned circumstances, and the head of the gripping tongue is provided so that it can be moved far back in the direction opposite to the punch axis from the part where the die is attached, thereby making it possible to take up a large space for changing the die. It is something.

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 and 2 together show the operation of the first embodiment, 1 is a fixed bed, 2 is a grip tongue, one end of which is a sliding body that is slidable on the bed 1. 35 through a pair of left and right horizontal shafts 3.

Molds 4 and 5 are removably provided at opposite ends of the bed 1 and the grip tongue 2, and in this example, the mold 4 on the bed side is clamped to the upset die 8 via the die plate 7 in the die holder 6. Dies 9 are arranged in parallel, and a die plate 7 is detachably attached to a die holder 6 with bolts (not shown).

Furthermore, the mold 5 on the grippong side has a die plate 11 removably attached to the upset die holder 10 with bolts (not shown), and an upset die 12 is attached to the die plate 11, and further,
A die holder 17 is removably attached to a die plate 16 formed by assembling the first holder 13 and the second holder 14 via a spherical seat 15 with bolts not shown, and a clamp die 18 is attached to the die holder 17. A mold 4 on a fixed side (bed side) and a mold 5 on a movable side (tongue side) are divided by a horizontal split surface, which are formed by arranging an upset die and a clamp die side by side.

Reference numeral 19 denotes an upset mechanism, and in this example, a slide block 20 is provided on the upper end surface of the bed 1, and a crank interlocking body 21 is interlocked and connected to the block 20, and a punch 22 is attached to and detached from the tip of the block by screwing or the like. By transmitting the rotation of the input shaft 23 through the gear interlocking body 24 to the crank interlocking body 21 so as to enable crank movement, the punch 22 can be freely inserted and removed between the molds 4 and 5, and 25 is the gear interlocking body. It's metal.

Reference numeral 26 denotes a pull rod, which is placed on both sides of the mold and applies a closing force to the mold through stretching of the rod. The lower part of the pull rod 26 is attached to the pivot shaft 2 on the swing arm 23.
9, and the upper part of the swing arm 28 is pivotally connected to the bed 1 via a pin 30. Therefore, the pivot shaft 29 is a pivot shaft that pivotally connects the pull rod 26 to the bed side. It consists of

The head of a crank arm 31 is connected to the middle of the swing arm 28 via a pin 32, and by imparting crank motion to the crank arm 31 via a gear transmission body 33, the pull rod 26 is connected to its upper pivot shaft 27. By swinging the rod 26 as a fulcrum,
can be enlarged.

Therefore, as long as the pull rod 26 can be stretched, a telescopic cylinder may be used instead of the grunk arm 31, and the lower end of the pull rod 26 can be directly pivoted to the bed side, and the upper pivot shaft 27 side A crank arm may also be provided on the top.

A wedge roller mechanism 34 is adopted as a clamping force applying mechanism for the clamp die 18 on the grip tongs 2 side, and the horizontal shaft 3, which is the fulcrum for opening and closing the bed 1 and the tongs 2, is a block provided on the upper end surface of the bed 1 so as to be slidable in the direction of the punch axis. attached to the shaped sliding body 35,
The sliding body 35 and a driving body 36 shown as a fluid pressure cylinder.
are connected. That is, the wedge roller mechanism 3
4 is the wedge 3 attached to the clamp die holder assembly 16.
7 is provided so as to be freely pushed forward and backward in the direction of the punch axis, and the wedge 37 is provided with a vertical interlocking lever 39 pivoted about a horizontal shaft 38, and the lever 39 is provided with a telescopic cylinder 4
It is configured to be able to apply a stretching force of 0.

Further, the sliding body 35 is slidable on a slide rail 41 formed on the bed 1, and the tube of the driving body 36 is connected to the bracket 42 by a pivot pin 43, and the forward movement end position of the sliding body 35 is set to a stop. 44 can be regulated. In addition, the sliding body 35
It is preferable that a stopper is detachably provided at the rear end of the sliding body 35, so that the tongs come into contact with the stopper 44 to prevent the tongue from moving backward (to the right in the figure) due to the punching force.

In order to replace the molds 4 and 5 in the embodiment shown in FIGS. 1 and 2, the tong side mold is removed from the holder and placed on the bed side mold, and the drive body 36 is reduced. slide the sliding body 35 onto the slide rail 4.
1 as shown in FIG.
It is retracted while rotating around the center, and therefore, the trouble of inserting and removing the horizontal shaft 3 can be saved.

In addition, after the maintenance of the molds 4 and 5 is completed, it is only necessary to extend the drive body 36, and the tongs 2
is closed while being tilted and rotated about the horizontal shaft 3, and is aligned at the position where the sliding body 35 contacts the stopper 44.

In the embodiments shown in FIGS. 3 to 8, the mold closing force can be applied exclusively through the stretching of the pull rod 26, and a hydraulic telescopic cylinder 45 is used instead of the crank as the driving body of the upset mechanism 19. It is something.

The horizontal shaft 3 is rotatably connected to the telescopic cylinder 45, and a hydraulic telescopic drive body 36 is connected to the telescopic cylinder 45 in the examples shown in FIGS. 3 and 4. In the example shown in FIG. 6, screw feed type drive bodies 36 are connected, and the seventh and eighth
In the figure, a rack and pinion type driving body 36 is connected.

That is, in any of the embodiments shown in FIGS. 3 to 8, the upset mechanism 19 and its driving body, the cylinder 45, are linearly slid along the slide rail 41 on the bed 1 by the driving body 36. Here, the cylinder 45 and the like constitute the sliding body 35.

That is, in FIGS. 3 and 4, a cylinder 45 constituting the sliding body 35 is provided with a driving body 3 for reciprocating the tongs 2.
6 is provided between the tongs 2 and bed 1, and
5 and 6, a female screw cylinder 46 is fixed to a cylinder 45, a screw screw, preferably a ball screw screw 47 is screwed onto the cylinder 45, and the screw 47 is rotated freely by a forward/reverse motor 48 to form a drive unit. Further, in FIGS. 7 and 8, a pinion 49 driven by a forward/reverse motor is provided in the cylinder 45, and a rack 50 with which the pinion 49 engages is fixed to the bed side to drive the drive body 36. In any of these embodiments, the gripping tongue side mold 5 is placed in the bed side molding, and the gripping tongue 2 is connected to the bed 1 side by pivoting the punch shaft around the pivot connecting shaft 29 of the pull rod 26. A driving body 36 is installed between the tongs 2 and the bed 1 so that it can be reciprocated and fixed in any direction.

That is, in each of the embodiments shown in FIGS. 3 to 8, the driving cylinder 45 of the upset mechanism 19 is attached to the bed 1.
The actuator 36 provided between the tongue 2 and the bed 1 along the slide rail 41 causes the tongs 2 and bed 1 to slide linearly, and this sliding (meaning that the cylinder 45 etc. becomes the slider 35). Connect the grip tongue 2 to the pull rod 26 on the bed 1 side through the
It is possible to freely reciprocate using the pivot connection shaft 29 as a fulcrum without having to insert or remove the horizontal shaft 3.

In short, according to the present invention, the grip tongue 2 is provided so as to be movable and fixed in the direction of the punch axis using the pivot shaft 29 as a fulcrum relative to the bed side of the pull rod 26. The molds 4 and 5 can be placed in the space, and the tongs 2 can be moved back a lot, and the space for replacing the molds 4 and 5 can be made large here, so that the replacement work can be carried out easily and effortlessly.

Further, the present invention provides a bed 1 of the grip tongue 2.
The horizontal shaft 3, which is a fulcrum for opening and closing the side, is pivotally supported by a sliding body 35 that slides on a slide rail 41 on the bed 1, and by sliding on this sliding body 35, the grip tongue 2 can be moved back greatly. There is an advantage that the work of inserting and removing the shaft 3 is not required and the work can be done easily.

Therefore, the present invention is highly effective as an upsetter for upsetting the head of a long material, as well as for upsetting an oil valve pipe.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIGS. 1 and 2 are side sectional views showing the operation of the first embodiment; FIGS. 3 and 4 are side sectional views of the second embodiment;
5 and 6 are side sectional views of the third embodiment, and FIG.
8 and 8 are side sectional views of the fourth embodiment. 1... Bed, 2... Griptongue, 3...
Horizontal axis, 4, 5...Mold, 19...Upset mechanism, 26...Pull rod, 29...Pivot connection shaft,
35...Sliding body, 36...Driving body for tongs.

Claims (1)

[Claims] 1 Connect one end of bed 1 and grip tongue 2 to horizontal axis 3
The molds 4 and 5 are removably connected to the bed 1 and the grip tongue 2 at opposite ends thereof, respectively, and an upset including a punch 22 that can be inserted into and removed from the molds 4 and 5. Pull rods 26 equipped with a mechanism 19 and provided on both sides of the molds 4 and 5
In the upsetter A, which applies a mold closing force by enlarging the punch, a horizontal shaft 3 rotatably connects the bed 1 and the grip tongue 2, and is pivotally supported by a sliding body 35 provided so as to be slidable on the bed 1 in the direction of the punch axis. A driving body 36 is provided between the gripping tongue 2 and the bed 1 so that the gripping tongue 2 can be reciprocated in the direction of the punch axis via the sliding body 35, and the mold 5 on the gripping tongue side is connected to the mold 4 on the bed side. Place the grip tongue 2 on the pull rod 2 against the bed 1 side.
6. An upsetter characterized in that the upsetter is mounted so as to be reciprocally movable and fixed in the direction of the punch axis via the drive body 36 using the pivot connection shaft 29 of No. 6 as a fulcrum.