Press device and piping process of the same

Abstract

To reduce complication of manufacturing process in a press device having a hole passage of a working fluid in a tie rod.SOLUTION: A press device (HP) includes: a plurality of frames (1, 2, 3) coupled by a tie rod (4); a hydraulic cylinder (6) supported by the frames; a passage (11) configured to supply a working fluid to the hydraulic cylinder; a hole passage (10) which forms a part of the passage and penetrates through the tie rod in an axial direction; a pipe (11H) including a pipe passage (R11H) forming a part of the passage; and an adapter member (20) including a connecting passage (R20) connecting the pipe passage (R11H) with the hole passage (10). The adapter member (20) is fixed between the tie rod (4) and the pipe (11H).SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a press device and a piping process for a press device.

Background Art

[0002] Patent Document 1 discloses a press device that provides a hole passage for working fluid in a tie rod and applies a load to a member to be formed by the hydraulic pressure sent through the hole passage. A pipe is connected to the opening of the hole passage of the tie rod, and the hole passage of the tie rod communicates with the flow path of the pipe.

[0003] By providing a hole passage for working fluid in the tie rod, various effects can be achieved, such as allowing the hole passage for working fluid to follow the elongation of the frame when a load is generated.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the manufacturing stage of a press device, since the tie rod is fastened very firmly, slight variations are likely to occur in the fixed position of the tie rod. If there is a variation in the position of the tie rod, the opening of the hole passage varies, and it becomes difficult to connect the hole passage of the tie rod and the pipe. Therefore, when providing a hole passage for working fluid in the tie rod, conventionally, high accuracy has been required for the fastening position of the tie rod, and the manufacturing process of the press device has been complicated.

[0006] An object of the present invention is to reduce the complexity of the manufacturing process in a press device having a hole passage for working fluid in a tie rod.

Means for Solving the Problems

[0007] A press device according to one aspect of the present invention includes a plurality of frames coupled by tie rods, a hydraulic cylinder supported by the plurality of frames, a flow path for supplying hydraulic fluid to the hydraulic cylinder, a hole flow path that is part of the flow path and axially penetrates the tie rod, a pipe including a pipe flow path that is part of the flow path, an adapter member including a connecting flow path that connects between the pipe flow path and the hole flow path, and is provided with the adapter member is fixed between the tie rod and the pipe.

[0008] A press device according to another aspect of the present invention includes a plurality of frames coupled by tie rods, a hydraulic cylinder supported by the plurality of frames, a flow path for supplying hydraulic fluid to the hydraulic cylinder, a hole flow path that is part of the flow path and axially penetrates the tie rod, a hose that includes a hose flow path that is part of the flow path and has flexibility, the hose is connected to the tie rod directly or via an adapter member.

[0009] A piping method for a press device according to one aspect of the present invention is a piping method for a press device that has a plurality of frames coupled by tie rods, a hydraulic cylinder supported by the plurality of frames, a flow path for supplying hydraulic fluid to the hydraulic cylinder, a hole flow path that is part of the flow path and axially penetrates the tie rod, a pipe including a pipe flow path that is part of the flow path, and an adapter member including a connecting flow path that connects between the pipe flow path and the hole flow path, and generates a load by the hydraulic pressure of the hydraulic fluid in the hydraulic cylinder to mold a workpiece, and includes a fastening step of fastening the tie rod to the frame, A machining process of adjusting the shape of the adapter member in response to displacement between the pipe and the tie rod after the fastening process; A fixing process of fixing the adapter member whose shape has been adjusted by the machining process between the tie rod and the pipe; and the method includes the above.

Advantages of the Invention

[0010] According to the present invention, an effect that the complexity of the manufacturing process can be reduced in a press device having a hole flow path for hydraulic fluid in the tie rod is obtained.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0012] Hereinafter, each embodiment of the present invention will be described in detail with reference to the drawings.

[0013] FIG. 1 is a diagram showing a press apparatus according to an embodiment of the present invention. The press apparatus HP according to the embodiment includes a plurality of frames (that is, a crown 1, a bed 2, and a plurality of uprights 3) coupled by tie rods 4, a hydraulic cylinder 6 supported by the plurality of frames, and a flow path (that is, a main pipe 11) for supplying a working fluid (for example, hydraulic oil) to the hydraulic cylinder 6. The hydraulic cylinder 6 corresponds to an example of the hydraulic cylinder according to the present invention.

[0014] Furthermore, the press apparatus HP includes a hole flow path 10 that is a part of the above flow path and penetrates the tie rod 4 in the axial direction, a pipe 11H including a pipe flow path R11H that is a part of the above flow path, and an adapter member 20 having a connecting flow path R20 that connects between the pipe flow path R11H and the hole flow path 10. The adapter member 20 is fixed between the tie rod 4 and the pipe 11H, and the press apparatus HP generates a load applied to the workpiece by the hydraulic pressure (for example, hydraulic pressure) of the working fluid of the hydraulic cylinder 6. The workpiece is formed by the load.

[0015] Specifically, the press apparatus HP includes all the conventional mechanical configurations. That is, the press apparatus HP includes a crown 1, a bed 2, and a plurality of uprights 3 connecting them. The tie rod 4 is passed through the upright 3 and tightened with nuts 5 from the outside of the crown 1 and the outside of the bed 2. Further, a hydraulic cylinder 6 is attached to the crown 1, and thereby the slide 7 is lowered. The raising of the slide 7 is performed by a hoisting cylinder 8.

[0016] In the press device HP as described above, a hole passage 10 for main piping is formed in the tie rod 4. The specific configuration is as follows. Usually four tie rods 4 are used, but the hole passage 10 is provided so as to penetrate axially through the number of tie rods 4 corresponding to the required number of pipes. As described above, when the hole passage 10 is provided in the tie rod 4, the maximum number of tie rods can be used as main pipes. The hole diameter of the hole passage 10 may be determined so that the flow velocity flowing through the hole becomes an appropriate velocity. Also, in order to keep the rigidity constant, holes of the same diameter may be machined in the tie rods 4 that are not used as main pipes, but basically, since the hole diameter to be machined is very small with respect to the tie rod diameter, there is not necessarily a need to machine. The tie rod 4 used as the main pipe is selected to be convenient in terms of circuit configuration in relation to the position of the hydraulic cylinder 6.

[0017] The press device HP further has a hydraulic pressure generating device HG. Note that a hydraulic pressure generating device that generally requires a large flow rate is composed of a plurality of pump units and often consists of a plurality of units.

[0018] The hydraulic pressure generating device HG is installed separately from the main body of the press device HP (crown 1, bed 2, upright 3, tie rod 4, hydraulic cylinder 6). The hydraulic pressure generating device HG may be installed on the same floor as the main body of the press device HP or at a position lower than that floor. The hydraulic pressure generated by the hydraulic pressure generating device HG is transmitted from the height of the floor to the height of the crown 1 via the main pipe 11.

[0019] In the example of FIG. 1, two tie rods 4 each have a hole passage 10 for one hydraulic cylinder 6 and constitute two main pipes 11. Therefore, the plurality of pump units P are divided into two groups Ga and Gb. Then, the hydraulic fluid discharged from the pump units divided into each group Ga and Gb is collected in the manifold blocks 1A and 1B, and the part from there becomes the main pipe 11. And the middle of this main pipe 11 is formed by the hole passage 10 formed in the tie rod 4.

[0020] Between the flow path from the opening of the hole flow path at the upper end of the two tie rods 4 to the port of the hydraulic cylinder 6, control blocks 2A and 2B incorporating a direction control valve or the like are provided. By remotely operating these control blocks 2A and 2B, the hydraulic cylinder 6 can be made to perform a descending operation or allowed to perform an ascending operation.

[0021] A lifting cylinder 8 is connected to the slide 7, and another hydraulic system is connected to this lifting cylinder 8. When this lifting cylinder 8 is contracted, the hydraulic cylinder 6 can be raised. The working fluid in the hydraulic cylinder 6 during the ascending operation is once stored in the pre-filter tank 12 and returned to the tank T through the return path 13 to the tank T. Incidentally, the working fluid supply path to this lifting cylinder 8 may also be configured using the hole flow path 10 in the tie rod 4.

[0022] The press device HP of the present embodiment has the following advantages. (1) Since the hole flow path 10 formed in the tie rod 4 is used as the main pipe 11, there is no need to use specially specified pipes. Since the hole flow path 10 in the tie rod 4 is straight and there is no change in the operation amount, there is no need to use a high-pressure tank or an accumulator for dealing with abnormally high pressure, and there is no difference in elongation between the press frame and the pipe, so there is no need to use a rubber hose or the like for absorbing elongation. Therefore, the degree of freedom in the design conditions of the main pipe 11 is increased, and the equipment cost is also low. (2) Since the main pipe attached to the side surface of the frame of the press device HP can be eliminated, abnormal forces acting due to the difference in rigidity do not occur.

[0023] <Connection process of the hole flow path 10 of the tie rod 4 and the pipe 11H> FIG. 2 is a diagram showing the connection portion between one end of the tie rod 4 and the pipe 11H.

[0024] The tie rod 4 fastens the crown 1, the upright 3, and the bed 2. Fastening means firmly connecting. The tie rod 4 realizes the above fastening by, for example, a shrink fitting method. The shrink fitting method is a method of obtaining a strong fastening force by heating the tie rod 4 in advance to stretch it when fastening the nut 5, and then cooling the tie rod 4 after fixing it with the nut 5. When the shrink fitting method is applied, it is not easy to accurately align the height (position in the z direction) of the end face of the tie rod 4 to a predetermined height at the completion of shrink fitting. Furthermore, the through holes of the crown 1 through which the tie rod 4 passes, the through holes of the upright 3, and the through holes of the bed 2 have a certain clearance. Therefore, when fastening the tie rod 4, it is not easy to accurately align the position of the end face of the tie rod 4 in the horizontal direction (x - y direction) to a predetermined position. Therefore, variations occur in the position of the opening at one end of the hole flow path 10 in the height direction and in the front - back, left - right directions (xyz directions in FIG. 2). Note that the tie rod 4 is not limited to being fastened by the shrink fitting method, and variations are likely to occur similarly even when other methods are applied.

[0025] On the other hand, the pipe 11H has rigidity and is designed to be arranged at a predetermined relative position with respect to the hydraulic cylinder 6, and is arranged as designed. The pipe 11H is, for example, a steel pipe and extends, for example, from the control block 2A to the vicinity of one end of the hole flow path 10. The component 117 in FIG. 2 is a flange component for attaching the pipe 11H to the control block 2A. In the press device HP, a high hydraulic pressure is applied to the working fluid in the pipe 11H. Therefore, by adopting a steel pipe as the pipe 11H, the performance of withstanding the high hydraulic pressure of the working fluid can be realized at low cost.

[0026] In the manufacturing process of the press device HP, after fixing the tie rod 4 and the pipe 11H, due to the characteristics of the tie rod 4 and the pipe 11H as described above, variations are likely to occur in the relative positional relationship between the end of the pipe 11H and the end of the hole flow path 10 of the tie rod 4 for each individual press device HP.

[0027] In the press device HP of the present embodiment, when connecting the piping flow path R11H and the hole flow path 10 in an on-site fit, by adjusting the shape of the adapter member 20, the above-described variations in the relative positional relationship are absorbed by the adapter member 20, facilitating the communication between the piping flow path R11H and the hole flow path 10 of the tie rod 4. "On-site fit" means fitting actual objects, which means performing the joining of combination parts that cannot be specified with high precision in the design drawing while adjusting with actual objects. The adjustment of the shape of the adapter member 20 includes adjusting the height of the joining surface, adjusting the front, rear, left, and right arrangements of the joining part, and adjusting the position of the connected part, and in other words, includes adjusting the dimensions of each part. The above "height" means the position in the direction perpendicular to the joining surface, and the above "front, rear, left, and right" means the two-axis directions parallel to the joining surface. The machining includes machining by a cutting machine such as lathe machining and milling machining.

[0028] The adapter member 20 has a connecting flow path R20 that is a through hole and has a size and weight that enable the above-described on-site fit and machining. That is, the adapter member 20 may be a member having a size and weight that can be carried by one or a plurality of workers or can be transported by a small crane. The adapter member 20 may have a block shape having a through hole that becomes the connecting flow path R20 or a plate shape having a through hole that becomes a flow path. The material of the adapter member 20 is a metal that can be cut by machining.

[0029] Subsequently, a plurality of embodiments of the structure of the connection part of the tie rod 4, the adapter member 20, and the piping 11H are shown.

[0030] <Embodiment 1 of the connection part between the hole flow path 10 of the tie rod 4 and the piping 11H> FIG. 3 is a plan view (a) showing the structure of the connection part and a cross-sectional view (b) showing the structure of the connection part. The plan view shows the state where the connecting member B such as a bolt is removed, and the cross-sectional view shows the connecting member B by a virtual line.

[0031] The connection part between the tie rod 4 and the pipe 11H in Embodiment 1 includes a fitting part 110 of the pipe 11H, a fastening part 115 of the pipe 11H, a fitting part 400 of the tie rod 4, a fastening part 450 of the tie rod 4, and a first fitting part 200 and a second fitting part 210 of the adapter member 20.

[0032] The fitting part 110 of the pipe 11H and the first fitting part 200 of the adapter member 20 are fitted together, the second fitting part 210 of the adapter member 20 and the fitting part 400 of the tie rod 4 are fitted together, and the fastening part 115 of the pipe 11H and the fastening part 450 of the tie rod 4 are fastened. By this fastening, the adapter member 20 is sandwiched and fixed between the pipe 11H and the tie rod 4.

[0033] The fitting part 110 is a convex part provided at one end of the pipe 11H. The fitting part 110 may be a single annular convex part in a plan view that extends over the entire circumference around the pipe flow path R11H. In a plan view, the center of the convex part and the center of the opening of the pipe flow path R11H may overlap. A groove m1 for positioning a sealing material p1 such as an O-ring is provided on the joint surface that intersects the flow path direction of the fitting part 110. A groove m2 for positioning a sealing material p2 such as an O-ring is provided on the joint surface along the flow path direction of the fitting part 110.

[0034] The first fitting part 200 is a concave part provided on one side of the adapter member 20. The first fitting part 200 may be a single annular concave part in a plan view that extends over the entire circumference around the opening of the connecting flow path R20. The first fitting part 200 has dimensions corresponding to the fitting part 110 of the pipe 11H.

[0035] The second fitting part 210 is a convex part provided on the other side of the adapter member 20. The second fitting part 210 may be a single annular convex part in a plan view that extends over the entire circumference around the opening of the connecting flow path R20. In a plan view, the center of the convex part and the center of the opening of the connecting flow path R20 may overlap. A groove m3 for positioning a sealing material p3 such as an O-ring is provided on the joint surface that intersects the flow path direction of the second fitting part 210. A groove m4 for positioning a sealing material p4 such as an O-ring is provided on the joint surface along the flow path direction of the second fitting part 210.

[0036] The fitting portion 400 is a recess provided at one end of the tie rod 4. The fitting portion 400 may be one annular recess extending over the entire circumference around the hole flow path 10. In plan view, the center of the recess and the center of the opening of the hole flow path 10 may overlap. The fitting portion 400 has dimensions corresponding to the second fitting portion 210 of the adapter member 20.

[0037] Note that the fitting portion 110, the first fitting portion 200, the second fitting portion 210, and the fitting portion 400 are not limited to the above specific examples, and various structures can be applied. For example, the concave-convex relationship between the fitting portion 110 and the first fitting portion 200 may be reversed. The concave-convex relationship between the second fitting portion 210 and the fitting portion 400 may be reversed.

[0038] The fastening portion 115 of the pipe 11H is a loose flange that is locked to one end of the pipe 11H. One end of the pipe 11H has a portion with a larger diameter, and the fastening portion 115, which is a loose flange, is locked at that portion. The fastening portion 115, which is a loose flange, has a play that allows the locking position to be shifted in the front-back, left-right directions with respect to the pipe 11H. The play may be, for example, about several millimeters. The fastening portion 115, which is a loose flange, is provided with a plurality of insertion holes h115 through which a connecting member B such as a bolt passes. The plurality of insertion holes h115 are provided at a plurality of locations surrounding the pipe 11H.

[0039] The fastening portion 450 of the tie rod 4 has a plurality of screw holes h450 provided at the end portion (one end portion in the longitudinal direction) of the tie rod 4. The plurality of screw holes h450 are provided at a plurality of locations corresponding to the plurality of insertion holes h115 of the fastening portion 115 of the pipe 11H and at a plurality of locations surrounding the hole flow path 10.

[0040] Even if the end position of the tie rod 4 is displaced in the front-back, left-right directions due to the play in the locking position of the fastening portion 115 of the pipe 11H and the play between the insertion hole h115 of the fastening portion 115 and the connecting member B, the displacement can be absorbed and the two can be fastened.

[0041] FIG. 4 is a plan view (a-1) and a cross-sectional view (a-2) showing the adapter member 20 before mating machining, and a plan view (b-1) and a cross-sectional view (b-2) showing the adapter member 20 after mating machining. The adapter member 20 is shaped by performing work during mating. This work is hereinafter referred to as "mating machining".

[0042] Before mating machining, as shown in FIGS. 4(a-1) and (a-2), the adapter member 20 does not have a first fitting portion 200, and on the side opposite to the second fitting portion 210, the portion excluding the connecting flow path R20 is configured in a planar shape.

[0043] The operator performs the piping method for connecting the working fluid piping as follows. That is, first, after the fastening step of fastening the tie rod 4, the operator measures the relative displacement between the end of the tie rod 4 and the end of the piping 11H before piping connection. Next, the operator cuts the surface on one side (the side opposite to the second fitting portion 210) of the adapter member 20 in accordance with the displacement in the height direction among the displacements, and adjusts the height H1 (working step).

[0044] Furthermore, before piping connection, the operator forms a first fitting portion 200 on the surface of one side of the adapter member 20 in accordance with the displacement in the front-rear, left-right directions among the relative displacements between the end of the tie rod 4 and the end of the piping 11H. In accordance with the above displacement, the center point in the plan view of the first fitting portion 200 is eccentric with respect to the center point of the connecting flow path R20.

[0045] By performing the mating machining in this way, even if there is the above relative displacement, one end of the tie rod 4 and one end of the piping 11H can be fastened with the adapter member 20 sandwiched therebetween. Therefore, the operator fastens these with the adapter member 20 sandwiched between the tie rod 4 and the piping 11H (fixing step). By this fastening, the hole flow path 10 of the tie rod 4 and the piping flow path R11H of the piping 11H communicate with each other via the connecting flow path R20.

[0046] As described above, by interposing the adapter member 20, it becomes possible to easily perform the piping connection of the working fluid even with respect to the hole flow path 10 of the tie rod 4 where variations in arrangement are likely to occur.

[0047] In addition, in the adapter member 20 of Embodiment 1, the connecting flow path R20 was already formed from one side to the other side before the fitting processing. However, before the fitting processing, at least the connecting flow path R20 on the piping 11H side may be unprocessed. Then, in the fitting processing, the connecting flow path R20 on the first fitting portion 200 side may be formed in correspondence with the above-described relative displacement so that the opening of the connecting flow path R20 on the piping 11H side overlaps the opening of the piping flow path R11H. In this case, a step is generated at the portion where the connecting flow path R20 on the first fitting portion 200 side and the connecting flow path R20 on the second fitting portion 210 side are connected, but processing such as finishing to smooth the step may be added.

[0048] <Embodiment 2 of the connection portion between the hole flow path 10 of the tie rod 4 and the piping 11H> FIG. 5 is a plan view (a) showing the structure of the connection portion of Embodiment 2 and a cross-sectional view (b) showing the structure of the connection portion. The plan view shows the state where the connecting member B such as a bolt is removed, and the cross-sectional view shows the connecting member B by a virtual line. FIG. 6 is a plan view (a-1) and an A-A line cross-sectional view (a-2) showing the adapter member before the fitting processing in Embodiment 2, and a plan view (b-1) and a B-B line cross-sectional view (b-2) showing the adapter member after the fitting processing.

[0049] The connection portion between the tie rod 4 and the piping 11H in Embodiment 2 includes a fitting portion 400A of the tie rod 4, a fitting portion 210A of the adapter member 20, a fastening portion 115A of the piping 11H, fastening portions 250A and 252A of the adapter member 20, and a fastening portion 450A of the tie rod 4.

[0050] Then, the fitting portion 210A of the adapter member 20 and the fitting portion 400A of the tie rod 4 are fitted together, the fastening portion 115A of the pipe 11H is fastened to the fastening portion 250A of the adapter member 20, and the fastening portion 252A of the adapter member 20 is fastened to the fastening portion 450A of the tie rod 4.

[0051] The fitting portion 210A is a convex portion provided on one side of the adapter member 20. The fitting portion 210A may be a single annular convex portion in a plan view that extends over the entire circumference around the opening of the connecting flow path R20. In a plan view, the center of the convex portion and the center of the opening of the connecting flow path R20 may overlap. A groove m3 for positioning a sealing material p3 such as an O-ring is provided on the joint surface that intersects the flow path direction of the fitting portion 210A. A groove m4 for positioning a sealing material p4 such as an O-ring is provided on the joint surface along the flow path direction of the fitting portion 210A.

[0052] The fitting portion 400A is a concave portion provided at one end of the tie rod 4. The fitting portion 400A may be a single annular concave portion that extends over the entire circumference around the opening of the hole flow path 10. In a plan view, the center of the concave portion and the center of the opening of the hole flow path 10 may overlap. The fitting portion 400A has dimensions corresponding to the fitting portion 210A of the adapter member 20.

[0053] Note that the fitting portion 210A and the fitting portion 400A are not limited to the above specific examples, and various structures can be applied. For example, the concave-convex relationship between the fitting portion 210A and the fitting portion 400A may be reversed. Also, without providing the fitting portion 210A and the fitting portion 400A, the end surface of the tie rod 4 where the hole flow path 10 opens and the end surface of the adapter member 20 where the connecting flow path R20 opens may be planar with respect to each other.

[0054] The fastening portion 115A of the pipe 11H has a flange F115A located at one end of the pipe 11H and an insertion hole h115A provided in the flange F115A. The insertion hole h115A passes a connecting member B such as a bolt. The flange F115A is provided with a screw hole n115A for fixing a hook bolt or the like when lifting one end of the pipe 11H.

[0055] The fastening portion 250A of the adapter member 20 has a threaded hole h250A provided at a position corresponding to the insertion hole h115A of the flange F115A. By screwing a bolt passed through the insertion hole h115A of the flange F115A into the threaded hole h250A, the pipe 11H and the adapter member 20 are fastened. The threaded hole h250A is provided at a plurality of locations surrounding the connecting flow path R20.

[0056] The fastening portion 252A of the adapter member 20 has an insertion hole h252A through which a connecting member B such as a bolt passes. The insertion hole h252A accommodates the end portion (such as the head of the bolt) of the connecting member B and does not project the connecting member B from the upper surface of the adapter member 20. The insertion hole h252A is provided at a plurality of locations surrounding the connecting flow path R20.

[0057] The fastening portion 450A of the tie rod 4 has a plurality of threaded holes h450A provided at an end portion (one end portion in the longitudinal direction) of the tie rod 4. The plurality of threaded holes h450A are provided at a plurality of locations corresponding to the plurality of insertion holes h252A of the adapter member 20 and at a plurality of locations surrounding the hole flow path 10.

[0058] The shape of the adapter member 20 is adjusted by performing fitting-time machining. Before the fitting-time machining, as shown in FIGS. 6(a-1) and (a-2), the fastening portion 250A is not provided, and on the side opposite to the fitting portion 210A, the portion excluding the connecting flow path R20 and the insertion hole h252A is configured in a planar shape.

[0059] The operator measures the relative displacement between the end portion of the tie rod 4 and the end portion of the pipe 11H before pipe connection, and cuts the surface on one side (the side opposite to the fitting portion 210A) of the adapter member 20 in accordance with the displacement in the height direction among the displacements, and adjusts the height H1.

[0060] Furthermore, before connecting the pipes, the worker forms the fastening portion 250A by providing a plurality of screw holes h250A on one side of the adapter member 20 in accordance with the displacement in the front-rear, left-right directions among the relative displacements between the end of the tie rod 4 and the end of the pipe 11H. In accordance with the above displacement, the arrangement of the plurality of screw holes h250A is eccentric with respect to the center point of the connecting flow path R20.

[0061] By performing on-site machining in this way, even if there is the above relative displacement, one end of the tie rod 4 and one end of the pipe 11H can be fastened via the adapter member 20. And by this fastening, the hole flow path 10 of the tie rod 4 and the pipe flow path R11H of the pipe 11H communicate with each other via the connecting flow path R20.

[0062] As described above, by interposing the adapter member 20, it becomes possible to easily connect the working fluid pipes even to the hole flow path 10 of the tie rod 4 where variations in arrangement are likely to occur.

[0063] Note that, in the adapter member 20 of Embodiment 2, the connecting flow path R20 was formed from one side to the other side before on-site machining. However, before on-site machining, at least the connecting flow path R20 on the side opposite to the fitting portion 210A may be unprocessed. And in on-site machining, the connecting flow path R20 on the pipe 11H side may be formed in correspondence with the above-described relative displacement so that the opening of the connecting flow path R20 on the pipe 11H side overlaps the opening of the pipe flow path R11H. In this case, a step occurs at the portion where the connecting flow path R20 on the tie rod 4 side and the connecting flow path R20 on the pipe 11H side are connected, but processing such as finishing to smooth the step may be added.

[0064] <Embodiment 3 of the Connection Portion between the Hole Flow Path 10 of the Tie Rod 4 and the Pipe 11H> FIG. 7 is a plan view (a) showing the structure of the connection part of Embodiment 3 and a cross-sectional view (b) showing the structure of the connection part. In the plan view, the state where the connecting member B such as a bolt is removed is shown, and in the cross-sectional view, the connecting member B is shown by a virtual line. FIG. 8 is a plan view (a-1) and a cross-sectional view (a-2) showing the adapter member before mating processing in Embodiment 3, and a plan view (b-1) and a cross-sectional view (b-2) showing the adapter member after mating processing.

[0065] The structure of the connection part of Embodiment 3 is a structure obtained by removing the fitting part 110, the first fitting part 200, the second fitting part 210, and the fitting part 400 from the structure of the connection part of Embodiment 1.

[0066] The end face of the tie rod 4 where the hole flow path 10 opens and the end face of the adapter member 20 where the connecting flow path R20 opens (the end face on the tie rod 4 side) are both planar, and the two are fixed in a state where the planar portions are in contact. Because they are planar, it is possible to shift the connection position in the left-right, front-back directions. A groove m5 for positioning a sealing material p5 such as an O-ring may be provided on the end face of the tie rod 4 so as to surround the opening of the hole flow path 10.

[0067] Similarly, the end face of the pipe 11H where the pipe flow path R11H opens and the end face of the adapter member 20 where the connecting flow path R20 opens (the end face on the pipe 11H side) are both planar, and the two are fixed in a state where the planar portions are in contact. Because they are planar, it is possible to shift the connection position in the left-right, front-back directions. A groove m6 for positioning a sealing material p6 such as an O-ring may be provided on the end face of the pipe 11H so as to surround the opening of the pipe flow path R11H.

[0068] And, similar to the connection part of Embodiment 1, the adapter member 20 is sandwiched between the end face of the pipe 11H and the end face of the tie rod 4. In this state, the fastening part 115 which is the loose flange of the pipe 11H and the fastening part 450 of the tie rod 4 are fastened via a connecting member B such as a bolt, whereby the pipe 11H, the adapter member 20, and the tie rod 4 are fastened. Even if the position of the adapter member 20 shifts after fixation, it will not shift significantly because it is surrounded by a plurality of connecting members B.

[0069] Before fitting processing, the adapter member 20 is a block-shaped member having a connecting flow path R20, and in fitting processing, the height H1 may be adjusted.

[0070] As described above, by interposing the adapter member 20, it becomes possible to easily perform the piping connection of the working fluid even with respect to the hole flow path 10 of the tie rod 4 where variations in arrangement are likely to occur.

[0071] Note that, in the adapter member 20 of Embodiment 3, before fitting processing, the connecting flow path R20 had been formed from one side to the other side. However, before fitting processing, at least one of the connecting flow paths R20 (on the tie rod 4 side or the piping 11H side) may be unprocessed. Then, in fitting processing, the connecting flow path R20 may be formed in correspondence with the relative positional displacement described above so that both openings of the connecting flow path R20 overlap with the opening of the hole flow path 10 and the opening of the piping flow path R11H, respectively. In this case, a step occurs at the portion where the connecting flow path R20 on the tie rod 4 side and the connecting flow path R20 on the piping 11H side are connected, but processing such as finishing to smooth the step may be added.

[0072] In the connection portions of the above-described Embodiments 1 to 3, depending on variations in the arrangement of the tie rod 4, the central axis A1 of the hole flow path 10 and the central axis A2 at the connection portion of the piping flow path R11H of the piping 11H do not overlap, and there is a displacement between both central axes A1 and A2. Further, when there are a plurality of tie rods 4 having hole flow paths 10 and a plurality of the above-described connection portions, depending on variations in the arrangement of the tie rods 4 in the height direction, the heights H1 of the plurality of adapter members 20 are not equal and include differences from each other.

[0073] <Embodiment 4 of the connection portion between the hole flow path 10 of the tie rod 4 and the piping 11H> FIG. 9 is a front view (a) and a side view (b) of the adapter member before fitting processing in Embodiment 4, and a cross-sectional view (c) showing the structure of the connection portion in Embodiment 4. In the cross-sectional view, the connecting member B is shown by a virtual line.

[0074] In Embodiment 4, at the end of the pipe 11H, the pipe flow path R11H extends in the front - rear direction. And the connecting flow path R20 of the adapter member 20 includes a first connecting flow path R201 extending in the front - rear direction and a second connecting flow path R202 extending in the height direction. And the pipe 11H is fastened to the front surface of the adapter member 20, and the adapter member 20 and the tie rod 4 are fastened in a state where the lower surface of the adapter member 20 and the end surface of the tie rod 4 are aligned.

[0075] The connection part between the tie rod 4 and the pipe 11H in Embodiment 4 has a fitting part 400C of the tie rod 4, a fitting part 210C of the adapter member 20, a fastening part 115C of the pipe 11H, fastening parts 250C, 252C of the adapter member 20, and a fastening part 450C of the tie rod 4.

[0076] The fitting parts 400C, 210C are the same as the corresponding components in Embodiments 1 and 2.

[0077] The fastening part 115C of the pipe 11H has a flange F115C located at one end of the pipe 11H and a plurality of insertion holes h115C provided in the flange F115C. The insertion holes h115C pass through a connecting member such as a bolt. The flange F115C is provided so as to surround the periphery of the opening of the pipe flow path R11H extending in the front - rear direction. Each insertion hole h115C is provided so as to extend along the central axis direction of the pipe 11H. The plurality of insertion holes h115C are provided so as to surround the central axis of the pipe 11H.

[0078] The fastening portion 250C of the adapter member 20 has a threaded hole h250C provided at a position corresponding to the insertion hole h115C of the flange F115C. By screwing a bolt passed through the insertion hole h115C of the flange F115A into the threaded hole h250C, the pipe 11H and the adapter member 20 are fastened. The threaded hole h250C is provided at a plurality of locations surrounding the first connecting channel R201. The front portion of the adapter member 20 where the fastening portion 250C is provided is planar except for the first connecting channel R201 and the threaded hole h250C.

[0079] The fastening portion 252C of the adapter member 20 has a plurality of insertion holes h252C through which a connecting member B such as a bolt passes. Each insertion hole h252C extends along the height direction. The plurality of insertion holes h252C are provided at a plurality of locations surrounding the second connecting channel R202 and at a plurality of locations that do not intersect the threaded hole h250C and the first connecting channel R201.

[0080] The fastening portion 450C of the tie rod 4 has a plurality of threaded holes h450C provided at the end portion (one end portion in the longitudinal direction) of the tie rod 4. The plurality of threaded holes h450C are provided at a plurality of locations corresponding to the plurality of insertion holes h252C of the adapter member 20 and at a plurality of locations surrounding the hole channel 10.

[0081] The shape of the adapter member 20 is adjusted by performing on-site machining. Before the on-site machining, the adapter member 20 is not provided with the fastening portion 250C as shown in FIGS. 9(a) and (b).

[0082] Before connecting the pipes, the operator measures the relative displacement between the end of the tie rod 4 and the end of the pipe 11H. In accordance with the displacement in the front-rear direction among the displacements, the surface on which the fastening portion 250C of the adapter member 20 is provided is cut, and the dimension D1 of the adapter member 20, that is, the position in the front-rear direction (y direction) of the surface on which the fastening portion 250C is formed, is adjusted. Further, in accordance with the displacement in the height direction and the displacement in the left-right direction among the above displacements, the positions in the height direction (z direction) and the left-right direction (x direction) of the plurality of screw holes h250C of the fastening portion 250C of the adapter member 20 are adjusted. In accordance with the above displacement, the arrangement of the plurality of screw holes h250C is eccentric with respect to the center point of the first connecting channel R201.

[0083] By performing the on-site fitting processing in this way, even if there is the above relative displacement, one end of the tie rod 4 and one end of the pipe 11H can be fastened via the adapter member 20. And by this fastening, the hole channel 10 of the tie rod 4 and the pipe channel R11H of the pipe 11H communicate with each other via the connecting channel R20.

[0084] As described above, by interposing the adapter member 20, it becomes possible to easily perform the piping connection of the working fluid even for the hole channel 10 of the tie rod 4 where variations in arrangement are likely to occur.

[0085] Note that, in the adapter member 20 of the fourth embodiment, the connecting channel R20 was formed from one side to the other side before the on-site fitting processing. However, at least the first connecting channel R201 may be unprocessed before the on-site fitting processing. And in the on-site fitting processing, the first connecting channel R201 may be formed in correspondence with the above-described relative displacement so that the opening of the first connecting channel R201 overlaps the opening of the pipe channel R11H.

[0086] Also, as the fastening portion 115C of the pipe 11H in the fourth embodiment, instead of the flange F115C integrated with the pipe 11H, a loose flange or the like may be adopted. In this case, the play in the locking position between the loose flange and the pipe 11H can be made to contribute to the position adjustment corresponding to the above-described relative displacement.

[0087] (Embodiment 5) FIG. 10 is a diagram showing a connection part in the press device of Embodiment 5. In the press device of Embodiment 5, a part of the main pipe 11 through which the working fluid is sent has a different configuration, and the rest is the same as that of the embodiment in FIG. 1. Hereinafter, the different configurations will be described in detail.

[0088] In Embodiment 5, as a part of the main pipe 11, a flexible hose 11K is provided. And the working fluid is sent to the hydraulic cylinder 6 through the hose flow path R11K which is the flow path of the hose 11K. The hose 11K is configured by providing a reinforcing material on the outside of a tube body made of, for example, rubber.

[0089] The hose 11K is connected to one end of the tie rod 4 via an adapter member 30. The hose flow path R11K corresponds to the flow path between the hole flow path 10 of the tie rod 4 and the control block 2A. A plurality of hoses 11K are provided between the adapter member 30 and the control block 2A. By having a plurality of hoses 11K, even when a high pressure is applied to the working fluid and the flow rate of the working fluid is large, the flow path diameter and the pressure resistance performance required for each hose 11K can be reduced.

[0090] Note that if the hose 11K can correspond to the flow rate and pressure of the working fluid by itself, one hose 11K may be applied instead of the plurality of hoses 11K. Also, the hose 11K may be directly connected to one end of the tie rod 4.

[0091] The adapter member 30 has a port P1 connected to one hole flow path 10, a plurality of ports P2 to P4 respectively connected to a plurality of hose flow paths R11K, and a branch flow path R30 communicating these ports P1 to P4. Connectors are provided on the plurality of ports P2 to P4, and one end of the hose 11K may be connected via the connectors. The adapter member 30 is connected to the end of the tie rod 4.

[0092] As described above, according to the press apparatus of Embodiment 5, a flexible hose 11K is applied as a pipe connected to the hole flow path 10 of the tie rod 4. Therefore, even if there is a variation in the fixed position of the end portion of the tie rod 4, the flexibility of the hose 11K absorbs the variation, so that the flow path of the hydraulic fluid can be easily configured.

[0093] Furthermore, using a plurality of hoses 11K, the hydraulic fluid flowing through the hole flow path 10 of the tie rod 4 is branched and sent to a plurality of hose flow paths R11K. Therefore, it becomes possible to send a large amount of hydraulic fluid at high pressure, such as the hydraulic fluid for driving the hydraulic cylinder 6, through the flexible hose 11K.

[0094] The above-described embodiments of the present invention have been explained. However, the present invention is not limited to the above-described embodiments. For example, in the above-described embodiment, an example is shown in which the hole flow path 10 of the tie rod 4 is used as a flow path for transporting hydraulic fluid from the hydraulic generator HG provided at a low position to the crown 1 at a high position. However, another cylinder may be provided near the bed 2 or the mold, and the hole flow path 10 of the tie rod 4 may be used to send hydraulic fluid from above the crown 1 or the press apparatus HP to the above-mentioned another cylinder. Further, in the above-described embodiment, the configuration in which the upper end portion of the hole flow path 10 of the tie rod 4 and the pipe are connected by fitting has been mainly described. However, the same configuration as the connection of the upper end portion may be applied to the connection between the lower end portion of the hole flow path 10 of the tie rod 4 and the pipe. In addition, the details shown in the embodiments can be appropriately changed without departing from the gist of the invention.

Explanation of Reference Numerals

[0095] HP Press apparatus 1 Crown 2 Bed 2A, 2B Control block 3 Upright 4 Tie rod 5 Nut 6 Hydraulic cylinder 7 Slide 8 Hoisting cylinder 10 Hole flow path 11 Main pipe 11H Pipe R11H Pipe Flow Path 12 Prefilter Tank 13 Return Path 1A, 1B Manifold Blocks P Pump Unit Ga, Gb Groups T Tank 20 Adapter Member R20 Connecting Flow Path R201 First Connecting Flow Path R202 Second Connecting Flow Path HG Hydraulic Generator 110 Fitting Part 115, 115A, 115C Fastening Parts F115A, F115C Flanges h115, h115A, h115C Insertion Holes n115A Threaded Hole 117 Flange Parts 200 First Fitting Part 210 Second Fitting Part 210A, 210C Fitting Parts 250A, 252A, 250C, 252C Fastening Parts h250A, h250C Threaded Holes h252A, h252C Insertion Holes 400, 400A, 400C Fitting Parts 450, 450A, 450C Fastening Parts h450, h450A, h450C Threaded Holes B Connecting Member 11K Hose 30 Adapter Member P1~P4 Ports R30 Branch Flow Path p1~p6 Sealing Materials m1~m6 Grooves H1 Height D1 Dimension

Claims

1. A plurality of frames coupled by tie rods, a hydraulic cylinder supported by the plurality of frames, a flow path for supplying hydraulic fluid to the hydraulic cylinder, a hole flow path that is part of the flow path and axially penetrates the tie rod, a pipe including a pipe flow path that is part of the flow path, an adapter member including a connecting flow path that connects between the pipe flow path and the hole flow path, comprising, the adapter member is fixed between the tie rod and the pipe, a press device.

2. The adapter member has a configuration in which the shape can be adjusted when connecting the pipe flow path and the hole flow path in alignment, The press device according to claim 1.

3. At the portion connecting to the connecting flow path, the central axis of the hole flow path and the central axis of the pipe flow path do not overlap, The press device according to claim 1.

4. A plurality of frames coupled by tie rods, a hydraulic cylinder supported by the plurality of frames, a flow path for supplying hydraulic fluid to the hydraulic cylinder, a hole flow path that is part of the flow path and axially penetrates the tie rod, a hose including a hose flow path that is part of the flow path and has flexibility, the hose is connected to the tie rod directly or via an adapter member, a press device.

5. Having a plurality of the hoses, The adapter member, includes a branch flow path that branches one hole flow path into a plurality of flow paths, a plurality of the hoses are connected to the adapter member, The press device according to claim 4.

6. A press device piping method for a press device having a plurality of frames coupled by tie rods, a hydraulic cylinder supported by the plurality of frames, a flow path for supplying hydraulic fluid to the hydraulic cylinder, a hole flow path that is part of the flow path and axially penetrates the tie rod, a pipe including a pipe flow path that is part of the flow path, and an adapter member including a connecting flow path that connects between the pipe flow path and the hole flow path, and generating a load by the hydraulic pressure of the hydraulic fluid in the hydraulic cylinder to form a workpiece, a fastening step of fastening the tie rod to the frame, a machining step of adjusting the shape of the adapter member in correspondence with the misalignment between the pipe and the tie rod after the fastening step, a fixing step of fixing the adapter member whose shape has been adjusted by the machining step between the tie rod and the pipe, A press device piping method including.

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