JP2011088235A - Push cutting press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make oil hardly drop on sponge titanium put on a table, even if oil leaks from hydraulic cylinders for driving a cutting blade and the oil supply pipe. <P>SOLUTION: The pair of right and left hydraulic cylinders 8 are arranged at the right and left outside of the table 2 put with the sponge titanium S thereon. As a result, oil is prevented from dropping to the sponge titanium S put on the table 2, even if oil leaks from the hydraulic cylinders 8 for driving the cutting blade 7 and the oil supply pipe. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a pressing machine for cutting massive sponge titanium produced by reducing titanium ore.

  When producing titanium metal, first, the porous titanium sponge is produced by reducing the titanium ore. Sponge titanium has a large lump shape of 5 tons and 10 tons, and generally has a substantially cylindrical shape, and the larger one has a cross-sectional diameter exceeding 2 m. The produced massive sponge titanium is cut to be sliced by a press-cutting press, and is further finely cut and crushed by a cutting machine or the like, and is melted in a melting furnace to be an ingot.

  Such a pressing press that cuts a large lump of sponge titanium cuts the sponge titanium placed on the table on the bed with a cutting blade that is driven to descend by a pair of left and right cylinders ( For example, see Patent Documents 1 and 2).

  In each of Patent Documents 1 and 2, a pair of left and right cylinders that drive a cutting blade are attached to a frame above a table on which sponge titanium is placed. These cylinders are hydraulic cylinders so as to obtain a large cutting force for cutting the sponge titanium having a large cross section. In addition, what was described in patent document 1 is also provided with the holding | pressing cylinder which presses and fixes the sponge sponge mounted on the table from upper direction.

Japanese Utility Model Publication No. 4-47912 JP 2002-301618 A

  In the conventional press-cutting presses described in Patent Documents 1 and 2, since a pair of left and right hydraulic cylinders that drive the cutting blades are mounted above the table on which the sponge titanium is placed, the hydraulic pressure that is loaded with a large cutting load. There is a problem that a large amount of oil leaks from the cylinder and its oil supply pipe and drops onto the sponge titanium below. Since the oil dripped in this manner oozes into the porous sponge titanium and cannot be removed, the product of the sponge titanium in which the oil has oozed becomes a defective product.

  Therefore, an object of the present invention is to make it difficult for oil to drip onto the sponge titanium placed on the table even if oil leaks from the hydraulic cylinder driving the cutting blade or its oil supply pipe.

  In order to solve the above-described problems, the present invention provides a pressing press for cutting a sponge titanium placed on a table on a bed with a cutting blade driven so as to descend by a pair of left and right hydraulic cylinders. The hydraulic cylinder was arranged on the left and right outside of the table on which the sponge titanium was placed.

  That is, by arranging a pair of left and right hydraulic cylinders on the left and right outside of the table on which the sponge titanium is placed, even if oil leaks from the hydraulic cylinder that drives the cutting blade and its oil supply piping, the sponge placed on the table It was made difficult for oil to drop on titanium.

  By arranging the pair of left and right hydraulic cylinders at the same left and right position as the side frames provided on the left and right sides of the bed, the hydraulic cylinder loaded with a large cutting load can be firmly supported on the side frame. At the same time, the risk of oil dropping to the sponge titanium can be further reduced.

  By providing means to correct the displacement of the displacement between the hydraulic cylinders due to the deviation of the cutting load on the pair of left and right hydraulic cylinders, the cutting blade is lowered horizontally even if the sponge titanium placed on the table is displaced from the left and right center. Thus, it is possible to prevent problems caused by the oblique cutting blade. In addition, since the span between the pair of left and right hydraulic cylinders is wide in this press-cutting press, the deviation of the cutting load applied to each hydraulic cylinder is reduced when the sponge titanium placed on the table is displaced in the left-right direction. Can cut sponge titanium in a well-balanced manner.

  The means for correcting the displacement deviation between the hydraulic cylinders detects the displacement of the pair of left and right hydraulic cylinders and controls the drive of each hydraulic cylinder so as to eliminate the deviation between the detected displacements. By adopting such a configuration, it is possible to correct the displacement deviation between the hydraulic cylinders with simple control.

  In the press-cutting press according to the present invention, the pair of left and right hydraulic cylinders are arranged on the left and right outside of the table on which the sponge titanium is placed. Therefore, even if oil leaks from the hydraulic cylinder that drives the cutting blade or its oil supply pipe, The risk of titanium products becoming defective is reduced.

Notched front view showing an embodiment of a press-cut press Side view of FIG. Sectional view along line III-III in FIG. (A), (b) is the front view explaining arrangement | positioning of the left-right paired cylinder in an Example and a comparative example, respectively.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, this press-cutting press is provided with frames 2a for preventing the titanium sponge S from falling off to the left and right sides of the table 2 on which the sponge titanium S is placed on the bed 1. Side frames 3 are erected on the left and right sides of 1 on the outside of the table 2, and an upper frame 4 that covers the upper side of the bed 1 is attached on the left and right side frames 3. Each side frame 3 is provided with a window 5 at the center in the front-rear direction, and is provided with overhanging portions 5 a that project from the left and right sides and the lower side into the window 5 on the inside of the press. The upper frame 4 is connected to the bed 1 by a plurality of tie rods 6 passed through the hollow portions of the side frames 3. Although not shown, the sponge titanium S placed on the table 2 is fed onto the bed 1 from the rear side of the press by a pusher or the like.

  The upper side of the window 5 of each side frame 3 and the left and right ends of the upper frame 4 are provided with mounting holes 3a and 4a penetrating in the vertical direction. The mounting holes 3a and 4a are placed on the table 2 in the mounting holes 3a and 4a. A pair of left and right cylinders 8 for driving a cutting blade 7 for cutting the sponge titanium S is attached. Each cylinder 8 is attached at the same left-right direction position as each side frame 3. In addition, a pressing cylinder 10 that presses and fixes the sponge titanium S with the pressing tool 9 is attached to the rear center portion of the upper frame 4 at the rear side of the cutting portion.

  The cutting blade 7 is attached to the rod 8a of each cylinder 8 on both the left and right sides of the upper surface, and provided with a flange portion 7a extending in the front-rear direction on the left and right sides of the lower surface so as not to interfere with the frame 2a of the table 2 when lowered. ing. Note that when the sponge titanium S is prevented from falling off by other means, it is not necessary to provide the frame 2a, and it is not necessary to provide the turning portion 7a.

  The pair of left and right cylinders 8 are double-acting hydraulic cylinders that drive the cutting blade 7 up and down. As will be described later, a cutting load of several hundred tons or more is applied to each cylinder 8 and a large amount of oil may leak from the cylinder 8 or its oil supply pipe. It is arranged outside the placed table 2 and its lower part is inside the window 5 of each side frame 3 whose front and rear sides are shielded. Further, in this embodiment, an overhanging portion is formed on the inside of the press of the window 5. Since 5a protrudes, it is possible to more effectively prevent a large amount of leaked oil from dripping onto the sponge titanium S. In this embodiment, the holding cylinder 10 is also a double-acting hydraulic cylinder. However, since the load of the holding cylinder 10 is about 1/5 or less of each cylinder 8, it is arranged inside the table 2. However, a large amount of oil does not leak, and there is no fear that the sponge titanium S product will be defective.

  The pair of left and right cylinders 8 is provided with a displacement sensor (not shown) that detects the displacement of the rod 8a. The outputs of these displacement sensors are input to a sequencer, and the sequencer controls the drive of each cylinder 8 so as to eliminate the deviation between the input displacements. Therefore, even if the sponge titanium S placed on the table 2 is shifted from the left and right center and the cutting load from the cutting blade 7 to each cylinder 8 is biased, the cutting blade 7 is lowered horizontally so that the cutting blade 7 It is possible to stably cut the sponge titanium S by preventing problems due to the slanting.

As an example, as shown in FIG. 4A, a pair of left and right cylinders 8 is arranged with a wide span L (= 4200 mm) outside the table 2, the cutting load P of the sponge titanium S is 1500 ton, and the sponge titanium S. the deviation amount e to the right when a 200 mm, left and right cutting load P _L that is loaded from the cutting blade 7 in the cylinder _8, the P _R, the following from the left and right center of the table 2 (1), Calculated from equation (2). As a comparative example, as shown in FIG. 4B, a pair of left and right cylinders 8 are arranged with a narrow span L (= 2200 mm) inside the table 2, and similarly, the cutting load P is 1500 tons and the displacement amount e is 200 mm. when formed into a cutting load _P L of the right and left to be loaded into the cylinder 8, also _{P R,} (1), was calculated from the equation (2).
(L / 2 + e) P _L = (L / 2−e) P _R (1)
P _L + P _R = P (2)

Table 1 shows the cutting load P _L, the calculation result of the P _R of the left and right about the comparative example with the above embodiment. The samples show the left and right cutting load _P L, _{P R} deviation ΔP ₍₌ P R -P _L) of also shown. From these calculation results, in the embodiment the span L and broadly 4200 mm, the span L of the comparative example in which narrow as 2200 mm, the left and right cutting load _P L, the deviation ΔP of _{P R} are almost halved, the It can be seen that the press-cutting press according to the invention can cut with good balance even if the sponge titanium S to be cut is displaced in the left-right direction.

  In the above-described embodiment, the pair of left and right cylinders are arranged at the same left and right position as the side frame. However, if these cylinders are arranged outside the table on which the sponge titanium is placed, the cylinders can be arranged inside the side frame. Of course, it may be outside the side frame.

  In addition, the pair of left and right cylinders are double-acting hydraulic cylinders that drive the cutting blades up and down, but single-acting hydraulic cylinders that only drive the cutting blades downward, and the cutting blades are raised by another cylinder. May be. Since the load of another cylinder for raising the cutting blade is small, it may be arranged inside the table.

  Furthermore, in the above-described embodiment, the pair of left and right cylinders are arranged above the bed and the cutting blade is pressed from above, but the pair of left and right cylinders are arranged below the bed and the cutting blade is pulled downward. It can also be done.

S Sponge titanium 1 Bed 2 Table 2a Frame 3 Side frame 4 Upper frame 3a, 4a Mounting hole 5 Window 5a Overhang portion 6 Tie rod 7 Cutting blade 7a Turning portion 8 Cylinder 8a Rod 9 Holding tool 10 Holding cylinder

Claims (4)

  In a pressing machine for cutting a sponge titanium placed on a table on a bed with a cutting blade driven so as to descend by a pair of left and right hydraulic cylinders, the pair of left and right hydraulic cylinders are placed on the titanium sponge A press-cut press characterized by being placed on the left and right outside of the table.   2. The press-cutting press according to claim 1, wherein the pair of left and right hydraulic cylinders are disposed at the same left and right position as side frames provided on both left and right sides of the bed.   The press-cutting press according to claim 1 or 2, further comprising means for correcting a displacement deviation between the hydraulic cylinders due to an uneven cutting load applied to the pair of left and right hydraulic cylinders.   The means for correcting the displacement deviation between the hydraulic cylinders detects the displacement of each of the pair of left and right hydraulic cylinders, and controls the drive of each of the hydraulic cylinders so as to eliminate the deviation between these detected displacements. The press-cutting press according to claim 3, wherein

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