JPS605946Y2 - Drilling device for billet end face - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for punching the end face of a billet as a pre-process of a piercing mill in a seamless steel pipe production line.

The conventional method for drilling this type of hole is to machine the hole before heating the billet, but this method not only increases processing costs but also takes time and has the drawbacks of poor yields. Ta.

There is also a method of drilling holes using a hydraulic press after heating the billet.

That is, as shown in FIG. 1, it consists of a processing section 1, a feed mechanism 2, a frame 3 that connects the two, etc. The processing section 1 has a lower holding frame 4 and an upper holding frame that moves up and down by a hydraulic mechanism. It consists of a frame 5 and a punch 6 that moves left and right by a hydraulic mechanism.

Further, the feed mechanism 2 is configured to move left and right on the frame 3 by a hydraulic mechanism.

Note that 7 is a billet, and 8 is a feed roller for the billet 7.

In the drilling device configured as described above, the heated billet 7 is sent to the right in the figure by the feed mechanism 2, inserted between the upper and lower holding frames 4 and 5, and the upper holding frame 5 is pushed down by the hydraulic mechanism. , the billet 7 is held and fixed at the center position.

Next, the punch 6 is advanced by a hydraulic mechanism to punch a hole in the end face of the billet 7.

By the way, billet 7 usually has a length of about 377L and an outer diameter of 2
A conical hole 7a of about 90φ is punched in the end face of the billet 7 using the punch 6. In order to make such a hole 7a in the end face of the heated billet 7, the punch 6 requires about 125 tons. Thrust must be applied.

Therefore, the upper and lower holding frames 4 and 5 must hold the billet 7 with a force that is approximately twice that amount, that is, approximately 250 tons, and as a result, the device becomes large and complicated, and the equipment cost increases. Not only is it expensive, but it also costs a lot of money to maintain.

In addition, since the work takes time and the billet 7 is cooled, there are many disadvantages such as an increase in the heating unit of the billet.

This invention was made to solve the drawbacks of conventional devices such as the present invention, and will be explained below with reference to the drawings.

FIG. 2 is a side view for explaining the outline of the embodiment of the present invention;
FIG. 3 is a plan view thereof.

In both figures, reference numeral 11 denotes a roller conveyor for transporting billets, which transports billets 7 at a high speed of usually 2 m/Sec or more.

Reference numeral 12 denotes a kit-out mechanism that sends out the processed billet 7 from the roller conveyor 11 in the lateral direction.

Reference numeral 13 denotes a fixed stand made of concrete or the like, which is installed on the base, and a punch 14 is embedded and fixed in the side thereof.

Reference numeral 15 denotes a billet push-back mechanism disposed close to the fixed base 13, which is composed of hydraulic cylinders 16 and 17 and push-back members 18 attached to both operating rods thereof.

19 is an upper roller. The operation of the device constructed as described above will be explained as follows.

The heated billet 7 passes on the roller conveyor 11 for 2 to 2 times.
．． The billet 7 is sent at a speed of 5 m/sec and collides with the punch 14, and the impact creates a desired hole 7a in the end face of the billet 7.
is dawned.

When the hole drilling is completed, the hydraulic cylinders 16 and 17 are operated to advance the push-back member 18, and the billet 7 is retracted from between the roller lla and the upper roller 19, and the kit-out mechanism 12
It is sent out laterally from the roller conveyor 11.

Note that a roller conveyor 11 is used to move the billet 7 backward.
may be rotated backwards.

At this time, the push-back member 18 may be operated only when the billet 7 is bitten by the punch 14 and does not retreat.

When drilling holes, the impact force on the punch 14 may be adjusted by increasing the feed speed of the roller conveyor when the mass of the billet 7 is small, and by decreasing the feed speed of the roller conveyor when the mass is large.

If the billet 7 has a different outer diameter, either adjust the height by moving the roller conveyor and upper roller 19 up and down so that the center of the billet 7 and the punch 14 match, or adjust the height of the punch, push-back mechanism, The position of the upper roller may be adjusted.

Incidentally, the upper roller 19 has one or more upper rollers and a waist hole sometimes has the function of preventing the billet 7 from jumping out from the roller conveyor 11 or pinching the billet 7.

As is clear from the above description, according to the present invention, the following remarkable effects can be achieved.

(1) Since the equipment is extremely simple, equipment costs can be reduced significantly.

(2) Unlike devices using conventional hydraulic punches, a high-pressure, large-capacity hydraulic system is not required, so it is inexpensive, does not require power, and has low maintenance costs.

(3) Processing time can be reduced to about one-third (it took about 1□□□ with the apparatus shown in Figure 1, but now it takes about 5 seconds).

(4) Since the operation is simple and the processed billet is sent out in the horizontal direction, it has become possible to incorporate it into a seamless steel pipe production line.

[Brief explanation of drawings]

FIG. 1 is a side view of an example of a conventional drilling device, FIG. 2 is a side view of an embodiment of the present invention, and FIG. 3 is a plan view thereof. 11...Roller conveyor, 12...Kit out mechanism, 13...Fixing stand, 14...
... Punch, 15 ... Billet push-back mechanism,
19... Upper roller.

Claims (1)

[Scope of utility model registration request] The drilling machine includes a fixed stand equipped with a punch, a transfer mechanism for transporting the billet opposite the punch and accelerating the billet to collide with the punch, and the drilling machine for separating the billet from the punch after processing. This is a billet end hole punching device that consists of a billet push-back mechanism and a kick-out mechanism that sends out the processed billet laterally.