WO1997000741A1

WO1997000741A1 - Method of molding metal bellows for bulging process, and metal bellows molding apparatus

Info

Publication number: WO1997000741A1
Application number: PCT/JP1995/001220
Authority: WO
Inventors: Isamu Sasaki
Original assignee: Isamu Sasaki
Priority date: 1995-06-20
Filing date: 1995-06-20
Publication date: 1997-01-09

Abstract

A pair of divisional mold members (16, 17) formed each metal mold body (15) are fixed via their respective support guide shafts (24, 25) so that the mold members can be moved in the axial direction of a tubular body, and clamp plates (18) are fitted in both side portions of the combined divisional mold members (16, 17) so that all of them are fixed unitarily to one another. The clamp plates (18) are supported on clamp plate guide shafts (22) so that the clamp plates can be moved in the axial direction of the tubular body, and each metal mold body (15) is moved as it is retained in a right-angled state with respect to the axial direction of the tubular body by the clamp plates (18). Each of a pair of divisional mold members (16, 17) and each clamp plate (18) move the guide shafts (22, 24, 25), which support each thereof, in the direction perpendicular to the axial direction of the tubular shaft, whereby each unit becomes able to be combined with and separated from another freely.

Description

Description Metal bellows forming method for bulging and metal bellows forming equipment

The present invention relates to a metal bulge forming method for bulge processing, which can improve the durability of a bulge processing die at a low cost and can easily handle the die. The present invention relates to a metal bellows forming apparatus. Background art

Conventionally, in a metal bellows forming apparatus for forming a corrugated bellows portion in a metal tube, as shown in FIG. 7, semicircular split holes 3a and 4a are provided in a material tube 1 for bellows forming. And a pair of split dies 3 and 4 joined and joined together to form a pair of mold bodies 2, and a material pipe 1 is formed by split holes 3 a-4 a formed by the mold bodies 2. Are constrained in series from the radial direction.

Then, a large number of mold bodies 2 holding the material pipe 1 in such a manner are arranged at regular intervals in a row, and as shown in FIG. 8, both ends of the material pipe 1 are sealed with end caps 5, 6, etc. Water flows into the material pipe 1 at the same time, and while increasing the fluid pressure, moves the material pipe 1 from the cylinder direction on the moving side (end cap 6 side in Fig. 8) to the cylinder direction on the fixed side (Fig. 8). Compress the inner end cap 5 side).

At the same time, each mold body 2 is also moved in the axial direction of the tube along with the compression of the material tube 1 so that the material is inserted into the corrugated space (not shown) formed by the mutually joined mold bodies 2-2. The outer periphery of the tube 1 is expanded to form a bellows portion in the material tube 1.

By the way, in order to form a bellows portion in the material tube 1 well, the mold body 2 that is moved in the tube axis direction at the time of forming the corrugated space that bulges the outer periphery of the material tube 1 is always in the tube axis direction. Must be moved at a right angle to.

To do this, as shown in FIGS. 7 and 8, the mold A press plate 7 for guiding the mold body 2 is arranged, and the mold body 2 is configured to move while being regulated by the press plate 7 when the mold body 2 moves.

However, in the case of such a method, since an unreasonable load is applied to the upper and lower surfaces of the mold body 2 and friction occurs, there is a disadvantage that the mold body 2 is severely worn and the frequency of component replacement increases. .

Also, if the mold die 2 wears out before the parts are replaced, the regulation by the press plate 7 becomes loose, and the split dies 3 and 4 become inclined as shown by the dotted line in Fig. 8. This makes it difficult to form a good bellows.

However, since the split type configured as described above is expensive, it is necessary to prevent the rise in cost by reducing the degree of wear and breakage as much as possible. In this type of device that performs joining and separation, it is necessary to simplify the handling of the split type.

The present invention has been made in view of such circumstances, and it is possible to increase the durability of a split type for bulging at a low cost and to easily handle the split type. It is an object of the present invention to provide a metal bellows forming method for processing and a metal bellows forming apparatus. Disclosure of the invention

In order to achieve the above object, according to the present invention, an outer periphery of a material pipe is formed by a half hole of both split molds, which is a pair of split molds and a pair of mold main bodies. A series of radially constrained mold bodies with the material pipe constrained as described above are arranged in a row in the axial direction of the pipe, and both ends of the material pipe are sealed to increase the pressure inside the pipe. In the metal bellows forming method for forming a bellows-shaped part, one side and the other side of a pair of split dies forming each mold body are moved in the axial direction of the tube by guide shafts supporting the respective sides. It can be freely mounted, and clamp plates are fitted on both sides of the joined split mold and fixed together as one. Each clamp plate is for clamp plate The mold body is movably supported in the direction of the tube body by the guides, and each mold body is moved by the clamps つつ while being maintained at a right angle to the direction of the tube body 時に during the movement. Each of the molds and each clamp plate is a metal bellows molding method that allows each unit to be freely joined and separated by moving each guide shaft supporting each in the direction perpendicular to the direction of the tubular body. Features.

In addition, as described in claim 2, the outer circumference of the material pipe is constrained in a radial direction by a pair of split mold halves, which are a pair of mold bodies, and the material is made as described above. A metal bellows forming apparatus in which a large number of mold bodies in which a pipe is constrained is arranged in the axial direction of the pipe, and both ends of the material pipe are sealed to form a corrugated bellows at a predetermined position while increasing the pressure in the pipe. A pair of split molds fitted and joined to both sides of the mold body, integrally fixedly attached to each other, and a clamp plate movably supported by a guide shaft arranged in the tube axis direction; The clamp shaft can be moved in the direction perpendicular to the tube body axis, and the clamp plate can be attached to and detached from the mold body. A clamp plate attaching / detaching cylinder means, one side and the other side of a pair of split molds Attached to guide shafts that movably support each split mold Is characterized in that it is a split-off for Siri Sunda means and the metal base mouth one's molding method comprising to each other bonding or separable both split.

Therefore, according to the present invention, the outer circumference of the raw material pipe is constrained in a radial direction by the half-holes of the two split molds, each of which is a pair of mold dies, as described above. A large number of constrained mold main rests are arranged in the axial direction of the tube, sealing both ends of the material tube, forming a corrugated bellows at predetermined locations while increasing the pressure inside the tube, and when moving each mold body. Each mold body is moved while being maintained at a right angle to the axial direction of the tube by each of the clamp plates, and each of the pair of split molds and each of the clamp plates are joined and separated by each unit. It is free. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is an explanatory side view showing a schematic configuration of an apparatus according to the present invention, and FIG. FIG. 3 is an explanatory plan view showing a state at the time of compression movement in FIG. 2, FIG. 4 is an explanatory view showing a mold body, and FIG. 5 is a bellows portion. FIG. 6 is an explanatory view showing a state in which a straight pipe portion is formed, FIG. 6 is an explanatory view showing another example of a mold body and a clamp plate, FIG. 7 is an explanatory view showing a conventional mold body, and FIG. FIG. 8 is an explanatory view showing a side surface in FIG. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIG. 1, reference numeral 11 denotes a frame constituting the apparatus main body 10, and the apparatus main body 10 is mounted on a base 12 installed on the floor A via the frame 11. Also, 13 is a pair of upper and lower fixed side end plates, 14 is a pair of upper and lower movable side end plates, 16 is one side (upper side) of the mold body 15 and 17 is the other side (upper side). The lower part) is a split type, and 18 is a clamp plate.

As shown in Fig. 4, the upper split mold 16 and the lower split mold 17 that make up the mold body 15 have semicircular split holes 16a and 17a at the center of the split surface. Are formed, and flanges 16b and 17b are formed to protrude on the left and right sides of the joining surfaces.

The upper split mold 16 and the lower split mold 17 have through holes 16c and 17c, respectively, which pass through the through hole 16c> 17c. The upper split mold 16 and the lower split mold 17 are movably supported by the guide shafts 24 and 25, respectively (see FIG. 1).

Both ends of this guide shaft 24> 25 protrude from the end plates 13 and 14 on the fixed and movable sides, and are bent in the direction perpendicular to the axial direction of the tube and then split. It is formed as a closed loop that is folded back along the pipe axis direction outside 16.17.

Guide shafts 24 and 25 arranged outside the split dies 16 and 17 along the pipe axis direction are provided with split type opening / closing cylinder means 26 and 27, respectively. The cylinder means 26 and 27 are provided so that the guide shafts 24 and 25 are respectively perpendicular to the pipe axis direction. The two split molds 16 and 17 can be joined or separated from each other. As shown in Fig. 4, the clamp plate 18 has a recess 18a that fits into the flanges 16b, 17b of the two split molds 16, 17 joined together. 18a is fitted to the flanges 16b, 17b of both split molds 16 and 17, and the two split molds 16 and 17 are fixed together to form a set of mold body 15 Form.

The fixed-side end plate 13 and the movable-side end plate 14 are divided into a pair of upper and lower parts as in the case of the split molds 16 and 17, and the upper fixed-side end plate 13 and the lower fixed-side end plate 1 3, When the upper moving side end plate 14 and the lower moving side end plate 14 are fitted to the split molds 16 and 17 on both sides, the same clamp plate 18 is fitted, The lower side is physically fixed.

The clamp plate 18 has an insertion hole 18b on the opposite side of the concave portion 18a, which is not shown in FIG. 1, but as shown in FIG. A guide for a clamp plate 22 penetrating through 18 b is supported movably in the axial direction of the tube.

Both ends of the guide shaft 22 protrude from the end plates 13 and 14 on the fixed side and the movable side, and are bent outside in the direction perpendicular to the axial direction of the tube, and then outside the clamp plate 18. In the shape of a closed loop folded back along the axial direction of the pipe.

The guide shaft 22 arranged outside the clamp plate 18 along the tube axis direction is provided with a cylinder means 23 for attaching and detaching the clamp plate. The cylinder means 23 enables the guide shaft 22 to move in a direction perpendicular to the tube axis direction, and makes the clamp plate 18 detachable from the mold body 15.

The outer circumference of the material pipe 19 is constrained in series by split holes 16a and 17a formed by the two split molds 16 and 17, and one end is fixed while being supported by the fixed end plate 13. The fixed-side pressing cylinder 20 is sealed by the pressing plug 20 a, and the other end is supported by the moving-side end plate 14 and sealed by the pressing plug 21 a of the forming pressing cylinder 21. Although not shown, one end of the material pipe 19 is pressed and sealed in order to increase the internal pressure of the material pipe 19 and expand the pipe to form a corrugated bellows at a predetermined position of the material pipe 19. The water liquid is forcibly flowed from the fixed-side pressing plug 20a.

Next, the operation of the device will be described.

First, as shown in FIG. 1, the upper and lower movable side end plates 14 and 1 are pulled back by the upper end plate moving cylinder 28 and the lower end plate moving cylinder 29, respectively. The split shaft 24 is pulled up by the split type opening / closing cylinder means 26, and the upper split type 16 is separated from the lower split type 17.

Referring to FIG. 2, the guides 轴 2 2, 2 2 are pulled back by the clamp plate attaching / detaching cylinder means 23, 23, whereby the left and right clamp plates 1, 8 are set. 18 is separated from the split dies 16 and 17.

Then, the lower split mold 1 in which the material pipes 19 are aligned upward through a gap created by the separation between the upper split mold 16, the lower split mold 17 and the clamp plate 18. 1 is inserted into the split hole 1 Ί a.

Next, when the guide shaft 24 is pushed down by the split type opening / closing cylinder means 26, the upper split type 16 is brought into contact with and joined to the lower split type 17 to form the two split types 16 The outer periphery of the raw material tube 9 is constrained in a series of radially in the half-holes 16a and 17a.

At this time, the flanges 16 b and 17 b of the two are also integrally joined, so that the guide shaft 22 movably supporting the clamp plate 18 is provided with a cylinder means for attaching and detaching the clamp plate. When pushed back by 23, the recesses 18b of the clamp plate 18 can be fitted to the flanges 16b, 17b of the upper split mold 16 and the lower split mold 17.

In this state, the pressing cylinder means 21 for molding is actuated, and as shown in FIG. 3, the moving end plate 14 is pressed to compress the material tube 19 in the direction of the fixed end plate 13. When this is done, each mold body 15 to which the split dies 16 and 17 are physically fixed by the clamp plate 18 is sequentially pressed and moved in the direction of the fixed end plate 13. At this time, the split molds 16> 17 of each mold body 15 move through the guide shafts 22 that support them, but are moved in the axial direction of the tube by the clamp plates 18. The split molds 16 and 17 are moved while being maintained at a right angle, and no frictional force acts on the split molds 16 and 17. The molds 16-16 and 17-17 are in contact with the outer circumference of the material pipe 19 so that they are perpendicular to the pipe axis direction, so that the bellows can be formed well. .

As shown in FIG. 5, a split type such as 16 is used for forming the bellows portion, but a split type such as 16 1 is used for the intuition maintaining portion. Next, an example of a suitable split mold and a clamp plate will be described with reference to FIG.

A bellows forming member 32 is attached to the peripheral portion of the split holes 30a, 31a of the split dies 30, 31. The material pipe 1 swells through the bellows forming member 32. A bellows portion is formed on the outer periphery of.

Short flanges 3 3, 3 3 are stretched on the left and right sides of the upper split mold 30, and formed slightly longer than the short flanges 33 on the left and right sides of the lower split mold 31. The long flanges 3 4 and 3 4 are stretched.

On the upper end face of the short flange 33 of the upper split mold 30, an engaging projection 3 3 a having a width smaller than the thickness of the short flange 33 is formed, and on the lower end face, an engaging groove is formed. 3 3b is formed.

An engagement projection 34 a having a width smaller than the thickness of the long flange 34 is formed on the upper end surface of the long flange 34 in the lower split mold 31. The part 34 is provided with a concave part 35 having an opening at the outer side that is the direction in which the part 34 is extended. On the upper and lower surfaces of the concave portion 35, an engaging four portion 35a and an engaging convex portion 35b having a width smaller than the thickness width are formed.

Thus, the engaging projections 34 a of the lower split mold 31 are fitted into the engagement grooves 33 b formed on the lower end face of the upper split mold 30, and the two split molds 30 are formed. , 3 1 are joined together. The positions of the engagement groove 33b and the engagement projection 34a are at the top. It may be formed so as to be the reverse of the case described above.

The clamp plate 36 is fitted to the long and short flanges 33, 34 of the split type 30> 31, which are integrally connected to each other, to fix them together.

That is, the clamp plate 36 is provided with a fitting recess 37 for fitting a flange, and the upper and lower end surfaces of the fitting recess 37 are provided with engaging projections provided on the flange 33> 34. Part 33a> An engagement recess 37a and an engagement projection 37b that are fitted with the engagement recess 35a are provided.

An engagement groove 37c is provided on the lower edge of the clamp plate 36, and the engagement projection 35b of the flange 34 is inserted and fitted into the engagement recess 37c.

Therefore, the depth of the fitting recess 37 is set so as to match the length of the long flange 34 of the lower split mold 31, that is, to join the side of the long flange 34. In addition, the length in the vertical direction is set so as to match the total length of the flanges 33, 34 when the split dies 30, 30 are joined.

When replacing the material pipe 19, the clamp plate 36 is slightly moved as shown by the left and right arrows in the figure until the concave portion 37 of the clamp plate 37 is disengaged from the short flange 33 of the upper split mold 30. The split flange on the side 3 2 The long flange 3 4 is slightly longer than the short flange 33 on the upper split die 30, so the concave portion 3 7 of the clamp plate 36 is the lower split die 3 The upper split mold 30 can be pulled up while being held by the flanges 3 4 of 1, so that the material pipe 19 can be taken in and out. The replacement work of 19 can be easily performed.

Reference numeral 38 denotes a force which is a through hole of the guide shaft 22. If the pivot 40 is passed through the clamp plate 36, a rotating cylinder (not shown) is attached to the pivot 40. By slightly rotating the clamp plate 36 as shown by the moving arrow in the figure, the clamp plate 36 is held on the flange 34 of the lower split mold 31 and the The latch on the flange 33 of the split mold 30 can also be released. The pivot 40 may be provided on the clamp plate 18 shown in FIG. In this embodiment, the clamp plate 18 (36) is provided with the flanges 16b, 17b of the upper and lower split types 16, 17 (30, 31) in the recesses 18a (37). (33, 34) has been described as a configuration in which the upper and lower split type 16> 17 (30, 31) sides are provided with a recess, and a clamp plate 18 (36) is placed in this recess. The protrusion provided on the side may be fitted.

Further, the upper split molds 16 (30) and the upper movable end plate 14 and the lower split molds 17 (3 1) and the lower movable end plate 14 protrude and retract, respectively. They are connected to each other by free connecting pins (not shown), and each split mold is pulled back by pulling back the movable end plate 14. Industrial applicability

As described above, according to the present invention, each of the mold bodies moved in the axial direction of the tube is in a state of being perpendicular to the direction of the tube by the clamp plates fitted on both sides during the movement. As a result, the frictional force does not act on the split mold at all, the degree of wear can be reduced, and the adjacent split molds are always perpendicular to the pipe body direction. It can be in contact with the outer circumference of the material pipe in such a state.

In addition, since each unit of the pair of split molds and each clamp plate can be moved in the direction perpendicular to the axial direction of the pipe body and each unit can be freely joined and separated, the material pipe can be taken in and out. Or a split type moving operation can be easily performed. Therefore, in bulging, the durability of the split mold can be increased at low cost, and the handling of the split mold can be performed easily.

Claims

The scope of the claims

1. The outer circumference of the material pipe is constrained in a radial direction by the half-holes of the two divided molds, which are a pair of mold dies, and the mold body is constrained as described above. In a metal bellows molding method in which a number of pipes are arranged in the axial direction, the ends of the material pipe are sealed, and a corrugated bellows portion is formed at a predetermined position while increasing the pressure in the pipe.

One side and the other side of a pair of split dies forming each mold body are mounted so as to be movable in the axial direction of the tube body by guide shafts supporting the respective sides, and both sides of the joined split dies are provided. The clamp plates are fitted together and fixed integrally to each other.Each clamp plate is supported by a guide shaft for the clamp plate so as to be movable in the axial direction of the tube. The plate is moved while being maintained at a right angle to the tube axis direction, and each of the pair of split molds and each clamp plate move each guide shaft supporting each in the direction perpendicular to the tube axis direction. A method for forming a metal bellows for bulging, characterized in that each unit can be freely joined and separated from each other.

2. — The mold body with the outer circumference of the material pipe constrained in a series of diameters in the radial direction by the half-holes of both split molds, which are a pair of mold bodies by split molds, and the material pipe is constrained as described above. In a metal bellows forming device that forms a corrugated bellows at predetermined locations while sealing the both ends of the material pipe and increasing the pressure inside the pipe,

A pair of split dies fitted and joined on both sides of the mold body, integrally fixed to each other, and movably supported by guides arranged in the pipe rest axis direction;

A clamp plate attaching / detaching cylinder means for enabling the guide shaft to move in a direction perpendicular to the axial direction of the tube, and for attaching / detaching the clamp plate to / from the mold body;

A split type opening / closing cylinder means which is attached to a guide which movably supports each split type on one side and the other side of the split type to be paired, and which allows both split types to be joined or separated from each other; , A metal bellows forming apparatus for bulging, comprising: