JP3723858B2 - Metal bellows forming method and metal bellows forming apparatus for bulge processing - Google Patents

Description

[0001]
[Industrial application fields]
The present invention improves the durability of a metal mold for bulging, in particular, at a low cost, and enables a metal bellows molding method and metal bellows molding apparatus for bulge processing that can easily handle the metal mold and the like. It is about.
[0002]
[Prior 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 on a material tube 1 for bellows forming, and A pair of mold main bodies 2 is formed by a pair of split molds 3 and 4 which are joined together and joined, and the outer periphery of the material pipe 1 is continuously formed from the radial direction by the split holes 3a-4a formed by the mold main bodies 2. To be restrained.
[0003]
Then, a large number of mold bodies 2 that constrain the material pipe 1 are arranged at regular intervals, and both ends of the material pipe 1 are sealed with end caps 5 and 6 as shown in FIG. Water or the like flows into the material pipe 1 and increases the liquid pressure while moving the material pipe 1 from the moving cylinder direction (end cap 6 side in FIG. 8) to the fixed cylinder direction (end cap in FIG. 8). 5 side).
[0004]
At the same time, each die body 2 is also moved in the axial direction of the tube body along with the compression of the material tube 1, and the material tube 1 is placed in a wavy gap (not shown) formed by the die bodies 2-2 joined together. The bellows portion is formed in the material tube 1 by bulging the outer periphery.
[0005]
[Problems to be solved by the invention]
By the way, in order to satisfactorily form the bellows portion in the material tube 1, the mold body 2 moved in the tube axis direction is always moved in the tube axis direction when forming a corrugated gap that bulges the outer periphery of the material tube 1. For this purpose, as shown in FIGS. 7 and 8, a press plate 7 for guiding the mold body 2 to the upper and lower surfaces of the mold body 2 or the like. The mold body 2 is moved while being regulated by the press plate 7 when the mold body 2 is moved.
[0006]
However, in the case of such a method, an excessive load is applied to the upper and lower surfaces of the mold main body 2 to cause friction, so that the mold main body 2 is worn heavily and the frequency of parts replacement is high.
[0007]
Further, if the die body 2 is worn before the parts are replaced, the restriction by the press plate 7 is loosened, and the divided dies 3 and 4 are likely to be inclined as shown by the dotted line in FIG. As a result, it becomes impossible to form a favorable bellows portion.
[0008]
Since the split mold configured as described above is expensive, it is necessary to reduce the degree of wear and damage as much as possible to prevent the cost from rising. In this type of apparatus that performs separation and separation, it is necessary to simplify the handling of the split type.
[0009]
The present invention has been made based on such circumstances, and can improve the durability of the split mold for bulge processing at a low cost and can easily handle the split mold. It aims at providing the metal bellows shaping | molding method for a process, and a metal bellows shaping | molding apparatus.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, as described in claim 1, the outer periphery of the material pipe is formed by a half-divided hole of both divided molds, which is a pair of mold bodies rather than a pair of divided molds. A series of constrains in the radial direction, and a large number of mold bodies that constrain the material pipe as described above are arranged in the axial direction of the tube body. In the metal bellows forming apparatus that forms the bellows part,
A pair of split molds that are fitted and joined to both sides of the mold body are integrally fixed to each other, and supported by a guide shaft arranged in the tube axis direction so as to be movable in a direction perpendicular to the tube axis direction. A clamping plate,
A split-type opening / closing cylinder means that is attached to a guide shaft that movably supports each of the split molds on one side and the other side of the pair of split molds, and that allows both split molds to be joined to or separated from each other;
Both split mold flanges with which the clamp plate is fitted are configured so that the upper split mold is short and the lower split mold is long. The guide shaft can be moved in the direction perpendicular to the tube axis direction. both the clamping plate removable cylinder means for detachably attached to, mounted to rotate cylinder to pivot provided on the clamping plate, the clamping plate by the operation of the pivot due to the rotation cylinder is stopped takes a split-type lower And the metal bellows shaping | molding apparatus for bulge processing characterized by being able to rotate so that an upper division | segmentation type | mold may be latched and cancelled | released .
[0012]
[Action]
According to the present invention, the outer periphery of the material pipe is constrained in a series in the radial direction by the half-divided holes of both divided molds that are a pair of mold bodies from the pair of divided molds, and the material pipe is restrained as described above. A large number of mold bodies are arranged in the axial direction of the tube, and both ends of the material tube are sealed to increase the pressure in the tube while forming a corrugated bellows at a predetermined location. The main body is moved while being maintained at a right angle with respect to the tube axis direction of each clamp plate by each clamp plate, and each of the pair of split molds and each clamp plate is joined and united with each other. It can be separated. In addition, the upper and lower split molds with which the clamp plate is fitted are configured so that the upper split mold is short and the lower split mold is long. The upper divided mold can be pivoted so that the upper divided mold is released and the upper divided mold can be separated from the lower divided mold.
[0013]
【Example】
Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view for explaining the schematic structure of the apparatus according to the present invention, and FIG. 2 is a plan view for explaining the schematic structure of the apparatus.
[0014]
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 surface A via the frame 11. Further, 13 is a pair of upper and lower fixed side end plates, 14 is a pair of upper and lower moving side end plates, 16 is a split mold on one side (upper side) constituting the mold body 15, and 17 is a split on the other side (lower side). A mold 18 is a clamp plate.
[0015]
As shown in FIG. 4, the upper split mold 16 and the lower split mold 17 constituting the mold body 15 are formed with semicircular split holes 16a and 17a at the center of the split surfaces, and are joined to each other. The left and right flanges 16b and 17b are formed to protrude. The upper split mold 16 and the lower split mold 17 are provided with insertion holes 16c and 17c, respectively, and the upper split mold 16 is guided by guide shafts 24 and 25 passing through the insertion holes 16c and 17c. And the lower split mold 17 are supported movably (see FIG. 1).
[0016]
Both end sides of the guide shafts 24 and 25 protrude from the fixed and moving end plates 13 and 14, and bend in the direction perpendicular to the tube axis direction and then outside the split molds 16 and 17. It is formed as a closed loop that is folded back along the tube axis direction.
[0017]
Split shaft opening / closing cylinder means 26 and 27 are provided on the guide shafts 24 and 25 arranged along the tube axis direction outside the split dies 16 and 17. The cylinder means 26 and 27 enable the guide shafts 24 and 25 to move in the direction perpendicular to the tube axis direction, respectively, and allow the split molds 16 and 17 to be joined or separated from each other.
[0018]
As shown in FIG. 4, the clamp plate 18 is provided with a recess 18 a that fits into the flanges 16 b and 17 b of the split molds 16 and 17 that are joined, and the recess 18 a is a flange of the split molds 16 and 17. 16b and 17b are fitted together, and both the split molds 16 and 17 are integrally fixed to form a set of mold main bodies 15.
[0019]
The fixed side end plate 13 and the moving side end plate 14 are divided as a pair of upper and lower sides like the split molds 16 and 17, and the upper fixed side end plate 13, the lower fixed side end plate 13, and the upper moving side. When the end plate 14 and the lower moving side end plate 14 are fitted to the split dies 16 and 17 on both sides, the same clamp plate 18 is fitted, and the upper side and the lower side are integrally fixed.
[0020]
The clamp plate 18 is provided with an insertion hole 18b on the opposite side of the recess 18a. Although not shown in FIG. 1, as shown in FIG. 2, the clamp plate penetrating the insertion hole 18b. The guide shaft 22 is supported so as to be movable in the tube axis direction. Both ends of the guide shaft 22 protrude from the end plates 13 and 14 on the fixed side and the moving side, and after being bent in a direction perpendicular to the tube axis direction, in the tube axis direction outside the clamp plate 18. Is formed as a closed loop that is folded back along.
[0021]
The guide shaft 22 disposed along the tube axis direction outside the clamp plate 18 is provided with cylinder means 23 for attaching / 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 allows the clamp plate 18 to be attached to and detached from the mold body 15.
[0022]
The outer periphery of the material pipe 19 is constrained in series by the split holes 16a and 17a formed by the two split dies 16 and 17, and one end of the material pipe 19 is supported by the fixed end plate 13 while being pressed by the pressing plug 20a of the fixed pressing cylinder 20. The other end is sealed by a pressing plug 21 a of the molding pressing cylinder 21 while being supported by the moving side end plate 14.
[0023]
In order to increase the pressure inside the tube in the material tube 19 to swell the tube body and form a corrugated bellows portion at a predetermined position of the material tube 19, although not shown, one end of the material tube 19 is pressed and sealed. Water solution is forced to flow in from the side pressing plug 20a.
[0024]
Next, the operation of the apparatus will be described. First, as shown in FIG. 1, the guide shaft 24 is split when the upper and lower moving end plates 14 and 14 are pulled back by the upper end plate moving cylinder 28 and the lower end plate moving cylinder 29, respectively. The upper split mold 16 is pulled up by the opening / closing cylinder means 26 and is separated from the lower split mold 17. Referring to FIG. 2, the guide shafts 22 and 22 are pulled back by the cylinder means 23 and 23 for attaching and detaching the clamp plate, whereby the left and right clamp plates 18 and 18 are divided into the split dies 16 and 17. And separated from each other.
[0025]
Then, the material pipe 19 is placed in the split hole 17a of the lower split mold 17 in which the material pipe 19 is aligned upward through a gap generated by the separated state of the upper split mold 16, the lower split mold 17 and the clamp plate 18. It is inserted. Next, when the guide shaft 24 is pushed down by the split mold opening / closing cylinder means 26, the upper split mold 16 is abutted against and joined to the lower split mold 17, and the split holes 16a of both split molds 16, 17 are joined. At 17a, the outer periphery of the material tube 9 is constrained in a series in the radial direction.
[0026]
At this time, since both the flanges 16b and 17b are also integrally joined, when the guide shaft 22 supporting the clamp plate 18 so as to be movable is pushed back by the cylinder means 23 for attaching / detaching the clamp plate, the upper divided type is used. The concave portion 18b of the clamp plate 18 can be fitted to the flanges 16b and 17b of the split mold 16 and the lower split mold 17.
[0027]
From this state, when the pressing cylinder means 21 for molding is operated and the moving side end plate 14 is pressed and the material tube 19 is compressed and moved toward the fixed side end plate 13 as shown in FIG. The mold bodies 15 formed by integrally fixing the divided dies 16 and 17 by the plate 18 are sequentially pressed and moved toward the fixed side end plate 13.
[0028]
At this time, the split dies 16 and 17 of each mold body 15 are moved through the guide shafts 22 that support them, but are moved in a state perpendicular to the tube axis direction by the clamp plate 18. As a result, no forced frictional force is applied to the split dies 16, 17, so that the split dies 16, 17 are less consumed and the adjacent split dies 16-16, 17-17 are always connected to each other. The material tube 19 is brought into contact with the outer periphery so as to be perpendicular to the body axis direction, and the bellows portion can be formed satisfactorily.
[0029]
As shown in FIG. 5, a split type such as 16 is used for forming the bellows part, but a split type such as 161 is used for the maintenance part of the intuitive part.
[0030]
Next, based on FIG. 6, an example of a suitable split type and a clamp plate is shown. A bellows molding member 32 is attached to the peripheral portions of the split holes 30a, 31a of the split dies 30, 31, and a bellows portion is formed on the outer periphery of the material tube 1 bulging through the bellows molding member 32.
[0031]
Short flanges 33, 33 are stretched on the left and right sides of the upper split mold 30, and long flanges 34 formed slightly longer than the short flange 33 on the left and right sides of the lower split mold 31. , 34 are stretched. On the upper end surface of the short flange 33 in the upper split mold 30, an engagement convex portion 33a having a width smaller than the thickness width of the short flange 33 is formed, and an engagement groove 33b is formed on the lower end surface. Yes.
[0032]
Further, on the upper end surface of the long flange 34 in the lower split mold 31, an engagement convex portion 34 a having a width smaller than the thickness width of the long flange 34 is formed. A recess 35 having an opening at the outer edge that is the extending direction is formed. On the upper and lower surfaces of the concave portion 35, an engaging concave portion 35a and an engaging convex portion 35b that are thinner than the thickness width are formed.
[0033]
Thus, the engaging convex portion 34a of the lower split mold 31 is fitted into the engaging groove 33b provided in the lower end face of the upper split mold 30, and the split molds 30 and 31 are integrally coupled. To do. In addition, you may form so that the formation position of the said engagement groove | channel 33b and the engagement convex part 34a may be reverse to said case.
[0034]
The clamp plate 36 is fitted to the long and short flanges 33 and 34 of the split molds 30 and 31 that are integrally coupled to each other, thereby fixing the two to each other. That is, the clamp plate 36 is provided with a fitting recess 37 for inserting the flange, and the upper and lower end surfaces of the fitting recess 37 are provided with the engaging protrusions 33a provided on the flanges 33 and 34. Engagement recesses 37a and engagement projections 37b fitted to the recesses 35a are provided.
[0035]
Further, a locking groove 37c is provided on the lower edge of the clamp plate 36, and the engaging convex portion 35b of the flange 34 is inserted and fitted into the engaging concave portion 37c. Accordingly, the depth of the fitting recess 37 is set so as to coincide with the length of the long flange 34 of the lower split mold 31, that is, to be coupled to the side of the long flange 34, and The length in the direction is set to coincide with the total length of the flanges 33 and 34 when the split molds 30 and 31 are joined.
[0036]
When the material pipe 19 is replaced, if the clamp plate 36 is slightly moved as shown by the left and right arrows in the drawing to the position where the concave portion 37 of the material pipe 19 is removed from the short flange 33 of the upper split mold 30, the lower split mold 32 is provided. Since the long flange 34 is stretched slightly longer than the short flange 33 of the upper split mold 30, the concave portion 37 of the clamp plate 36 remains in the state of being hooked on the flange 34 of the lower split mold 31. Thus, the upper split mold 30 can be pulled up, whereby the material tube 19 can be taken in and out, and the material tube 19 can be easily replaced with less work.
[0037]
Reference numeral 38 denotes an insertion hole for the guide shaft 22. If the pivot 40 is inserted into the clamp plate 36 and a pivoting cylinder (not shown) is attached to the pivot 40, the clamp plate 36 is slightly shown in the figure. By rotating as indicated by a rotation arrow, the clamp plate 36 can be locked on the flange 34 of the lower split mold 31 and the lock on the flange 33 of the upper split mold 30 can be released. it can.
[0038]
The pivot 40 may be provided on the clamp plate 18 shown in FIG. In this embodiment, the clamp plate 18 (36) has been described as having a configuration in which the flanges 16b and 17b (33 and 34) of the upper and lower split molds 16 and 17 (30 and 31) are inserted into the recess 18a (37). However, a concave portion may be provided on the upper and lower split molds 16 and 17 (30, 31) side, and a convex portion provided on the clamp plate 18 (36) side may be inserted into the concave portion.
[0039]
Further, the upper divided molds 16 (30) and the upper moving side end plate 14, and the lower divided molds 17 (31) and the lower moving side end plate 14 are respectively movable connecting pins (not shown). ) And the divided molds are also pulled back by pulling back the moving side end plate 14.
[0040]
【The invention's effect】
As described above, according to the present invention, each mold body moved in the tube axis direction is maintained in a state perpendicular to the tube axis direction by the clamp plates fitted on both sides during the movement. Therefore, no forced frictional force acts on the split molds, and the degree of wear can be reduced, and the adjacent split molds are always perpendicular to the tube axis direction. In this way, the outer periphery of the material pipe can be contacted.
[0041]
In addition, each of the pair of split molds and each clamp plate can move each unit in a direction perpendicular to the tube axis direction, and each unit can be joined and separated, so that the material tube can be inserted and removed. Split-type moving operations can be easily performed. In particular, the pivot provided on the clamp plate is configured such that the upper and lower split molds with which the clamp plate is fitted are configured so that the upper split mold is short and the lower split mold is long. The clamp plate is locked to the lower split mold by the operation, and the upper split mold can be pivoted so as to be unlocked, and the upper split mold and the lower split mold can be operated quickly. in and can be separated.
[0042]
Therefore, in the bulge processing, the durability of the split mold can be increased at a low cost, and the split mold can be handled easily.
[Brief description of the drawings]
FIG. 1 is an explanatory side view showing a schematic configuration of an apparatus according to the present invention.
FIG. 2 is an explanatory plan view showing a schematic configuration of the apparatus in FIG. 1;
3 is an explanatory plan view showing a state during compression movement in FIG. 2; FIG.
FIG. 4 is an explanatory view showing a mold body.
FIG. 5 is an explanatory view showing the formation time of the bellows portion and the straight pipe portion.
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.
FIG. 8 is an explanatory view showing a side surface in FIG. 7;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Apparatus main body 13 Fixed side end plate 14 Fixed side end plate 15 Mold main body 16 One side split mold 17 The other side split mold 18 Clamp plate 19 Material tube 20 Fixed side press cylinder 21 Molding press cylinder 22 Clamp plate Guide shaft 23 Clamp plate attaching / detaching cylinder means 24, 25 Split type guide shafts 26, 27 Split type opening / closing cylinder means

Claims (1)

The outer periphery of the material pipe is constrained in a series in the radial direction by a half-divided hole of both divided molds, which is a pair of mold bodies from a pair of divided molds, and the mold body that restrains the material pipe as described above is a tubular body In a metal bellows molding device that forms a series of corrugated bellows at a predetermined location while arranging a large number of rows in the axial direction and sealing both ends of the material tube to increase the pressure inside the tube,
A pair of split molds that are fitted and joined to both sides of the mold body are integrally fixed to each other, and supported by a guide shaft arranged in the tube axis direction so as to be movable in a direction perpendicular to the tube axis direction. A clamping plate,
A split-type opening / closing cylinder means that is attached to a guide shaft that movably supports each of the split molds on one side and the other side of the pair of split molds, and that allows both split molds to be joined to or separated from each other;
Both split mold flanges with which the clamp plate is fitted are configured so that the upper split mold is short and the lower split mold is long. The guide shaft can be moved in the direction perpendicular to the tube axis direction. both the clamping plate removable cylinder means for detachably attached to, mounted to rotate cylinder to pivot provided on the clamping plate, the clamping plate by the operation of the pivot due to the rotation cylinder is stopped takes a split-type lower And the metal bellows shaping | molding apparatus for bulge processing characterized by being able to rotate so that an upper division | segmentation type | mold may be latched and cancelled | released .

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