JP3733436B2 - Metal bellows forming equipment for bulge processing - Google Patents

Description

[0001]
[Industrial application fields]
The present invention improves the durability of a bulge processing mold for forming a bellows portion at a plurality of locations of a particularly long material pipe at low cost, and allows easy handling of the mold. The present invention relates to a metal bellows forming apparatus.
[0002]
[Prior art]
Conventionally, as a metal bellows forming device for forming a corrugated bellows portion on a metal tube, a device for forming a bellows portion at a time on a material tube of a predetermined length and a plurality of locations while moving a long material tube intermittently There is a continuous type that forms the bellows part.
[0003]
As shown in FIG. 9, for example, the bellows molding part in such an apparatus is configured using a split mold. That is, a semicircular split hole 3a, 4a is provided for the material tube 1 for bellows molding, and a pair of mold bodies 2, 4 is formed by a pair of split dies 3, 4 joined together. The outer periphery of the material pipe 1 is constrained in a series from the radial direction by the split holes 3a-4a formed by the mold body 2.
[0004]
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. A liquid 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. 10) to the fixed cylinder direction (end cap in FIG. 10). 5 side).
[0005]
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.
[0006]
[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. Needs to be moved in a state of being at right angles to.
[0007]
For this purpose, as shown in FIG. 9 and FIG. 10, press plates 7 for guiding the mold body 2 are arranged on the upper and lower surfaces of the mold body 2, and the mold body when the mold body 2 is moved. 2 is moved while being regulated by the press plate 7.
[0008]
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.
[0009]
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.
[0010]
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.
[0011]
The present invention has been made based on such circumstances. The durability of the split type for bulge processing, in which a bellows portion is formed at a plurality of locations while intermittently moving a long material pipe, is reduced in cost. It is an object of the present invention to provide a metal bellows forming apparatus for bulge processing that can be easily increased and can easily handle a split mold.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a metal bellows in which a material tube is intermittently fed from a material tube installation portion into a bellows molding portion, and a predetermined number of bellows portions are formed at a plurality of locations on the material tube. In the molding apparatus, the bellows molding part includes a mold body and a mold that are constrained in series in the radial direction on the outer periphery of the material pipe by a half hole in the pair of split molds and arranged in a row in the tube axis direction. A pair of split molds forming the main body are integrally fixed to each other, and a clamp plate that is movably supported by a guide shaft arranged in the tube axis direction, and the guide shaft is moved in a direction perpendicular to the tube axis direction. Clamp plate attaching / detaching cylinder means that enables the clamp plate to be attached to and detached from the mold body, and a guide shaft that movably supports the split molds on one side and the other side of the pair of split molds. Can be attached to both split molds Characterized by a configuration in which a split-off cylinder means to focus or separable.
[0013]
[Action]
According to the present invention, in the bellows molding portion into which the material pipe is fed, the outer periphery of the material pipe is constrained in a series in the radial direction by the split holes of the two split molds that form a pair of mold bodies by a pair of split molds. As described above, a large number of mold bodies that constrain the material pipe are arranged in the axial direction of the tube, and the bellows forming portion of the material tube is sealed to increase the pressure inside the tube, and the corrugated bellows is formed at a predetermined position. Forming a part, intermittently moving the material pipe, sequentially feeding the straight pipe part of the material pipe to the bellows molding part, and when moving each mold body in the bellows molding part, The clamp plate is moved while being maintained at a right angle with respect to the axial direction of the tube body, and each of the pair of split molds and each clamp plate can be joined and separated from each other.
[0014]
【Example】
Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory view showing a schematic configuration of an apparatus according to the present invention, and FIGS. 2 to 4 are explanatory views showing a configuration of a bellows molding part in the apparatus.
[0015]
As shown in FIG. 1, the apparatus according to the present invention generally includes at least a bellows molding part 10, a material pipe installation part 50, a material pipe sealing feed part 60, a material pipe take-out part 70, and each of these parts electrically. It is comprised by the control part 80 which controls and controls.
[0016]
In the material pipe installation section 50, each of the long material pipes 19 taken out from a material pipe standby section (not shown) directs the front end portion thereof toward the bellows molding portion 10, and the rear end portion thereof is sealed and fed to the material pipe. It is arranged as a horizontal shape toward the part 60.
[0017]
In the material pipe sealing feed section 60, a hydraulic pressure adjusting feed rod 62 having a special sealant 61 (see FIG. 7) attached to the bellows section is disposed in the material pipe 19 so as to freely move back and forth. The special sealing material 61 is fed into a desired portion of the material pipe 19 from the rear end portion of the material pipe 19 arranged horizontally at 50.
[0018]
The special sealing material 61 inserted inside the material pipe 19 seals the front and rear range of the place where the bellows part is formed, and forcibly feeds liquid or the like from the outside into the sealed space part. 6 together with the split mold 16 shown in FIG. 6, the material tube 19 is bulged to form a bellows portion.
[0019]
The material pipe take-out section 70 is provided with the material pipe 19 sent out from the bellows molding section 10 and receives the material pipe 19 intermittently sent out from the bellows molding section 10 in order, and finally. Although not shown, the material tube 19 after molding is transferred out of the apparatus by the material tube take-out mechanism.
[0020]
Next, the bellows molding part 10 constituting the main part of the apparatus according to the present invention will be described. The bellows molding part 10 is attached to a base 12 installed on the floor surface A via a frame 11. In addition, a pair of upper and lower fixed side end plates 13 and 13 and a pair of upper and lower moving side end plates 14 and 14 are provided, and one side (upper side) split mold 16 and the other side (lower side) constituting the mold body 15 are provided. Side) split mold 17 and a clamp plate 18 that fits the side faces of both split molds 16 and 17 and fixes them together.
[0021]
As shown in FIG. 5, 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. 2).
[0022]
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.
[0023]
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.
[0024]
As shown in FIG. 5, 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 together. 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.
[0025]
As described above, the fixed side end plate 13 and the moving side end plate 14 are divided into a pair of upper and lower sides like the split molds 16 and 17, and the upper fixed side end plate 13 and the lower fixed side end plate 13, When the upper moving side 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 integrated. It is fixed.
[0026]
The clamp plate 18 is provided with an insertion hole 18b on the opposite side of the recess 18a. Although not shown in FIG. 2, as shown in FIG. 3, 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.
[0027]
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.
[0028]
The material pipe 19 has its outer periphery constrained in series by the split holes 16a and 17a formed by the two split molds 16 and 17, and the distal end side of the material pipe 19 is inserted through the fixed side end plate 13 and the support portion 20, and then the material pipe 19 is used. It is sent out to the take-out unit 70.
[0029]
Further, the rear end side of the material pipe 19 is inserted through the movable side end plate 14 and the support portion 21, and then extends forward and backward from the material pipe sealing feed portion 60 disposed on the rear side of the bellows molding portion 10. The special sealing material 61 provided is inserted, and the flange 21 a attached to the hydraulic pressure adjusting feed rod 62 presses and seals the rear end portion of the material pipe 19.
[0030]
The special sealing material 61 seals the front and rear range of the place where the bellows part is formed, and forcibly feeds liquid or the like from the outside into the sealed space part, increasing the internal pressure while dividing the division shown in FIG. Together with the mold 16, the material tube 19 is bulged to form a bellows portion.
[0031]
Next, the operation of the apparatus will be described. First, the material pipe 19 is set horizontally on the material pipe installation section 50, then the special seal material 61 is fed out from the material pipe sealing feed section 60 and inserted into the pipe from the rear end portion of the material pipe 19.
[0032]
In this state, the material pipe 18 is fed into the bellows molding part 10. Then, as shown in FIG. 2, the guide shaft 24 is divided into the upper and lower moving side end plates 14 and 14 being 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.
[0033]
Referring to FIG. 3, the guide shafts 22 and 22 are pulled back by the cylinder means 23 and 23 for attaching / detaching the clamp plate, whereby the left and right clamp plates 18 and 18 are divided into the split molds 16 and 17. And in a separated state.
[0034]
That is, the upper split mold 16 and the lower split mold 17 are in a released state due to the separated state of the clamp plate 18, and the inserted raw material pipe 19 is the lower split mold 17 aligned upward. Is inserted into the split hole 17a. 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.
[0035]
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.
[0036]
From such a state, when the material pipe sealing feed section 60 is operated and the moving side end plate 14 is pressed and the material pipe 19 is compressed and moved in the direction of 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.
[0037]
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.
[0038]
As shown in FIG. 6, 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.
[0039]
Next, an example of a suitable split type and a clamp plate will be shown based on FIG. 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.
[0040]
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.
[0041]
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.
[0042]
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.
[0043]
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.
[0044]
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.
[0045]
If the clamp plate 36 is slightly moved to the position where the concave portion 37 of the upper split mold 30 is disengaged (as indicated by the left and right arrows in the figure), the long flange 34 of the lower split mold 32 is Since it is stretched slightly longer than the short flange 33 of the upper split mold 30, the concave portion 37 of the clamp plate 36 is held on the flange 34 of the lower split mold 31 while being held on the upper split mold 31. The mold 30 can be pulled up, so that the mold body 15 can be easily released and joined with a small number of operations.
[0046]
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.
[0047]
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.
[0048]
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.
[0049]
【The invention's effect】
As described above, according to the present invention, when the material tube is intermittently fed into the bellows molding portion and the bellows portions are molded at a plurality of locations of the long material tube, Since the mold body is moved while being moved at right angles to the tube axis direction by the clamp plates fitted on both sides during the movement, no forced friction force acts on the split mold. The degree of wear can be reduced, and the adjacent divided dies can always be in contact with the outer periphery of the material pipe so as to be perpendicular to the tube axis direction.
[0050]
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.
[0051]
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 diagram showing a schematic configuration of an apparatus according to the present invention.
2 is an explanatory view showing a configuration of a bellows molding part configuration in FIG. 1; FIG.
FIG. 3 is an explanatory plan view showing a schematic configuration of the apparatus in FIG. 2;
4 is an explanatory plan view showing a state during compression movement in FIG. 3; FIG.
FIG. 5 is an explanatory view showing a mold body.
FIG. 6 is an explanatory view showing the formation time of the bellows portion and the straight pipe portion.
FIG. 7 is an explanatory view showing a special sealing material.
FIG. 8 is an explanatory view showing another example of a mold body and a clamp plate.
FIG. 9 is an explanatory view showing a conventional mold body.
10 is an explanatory view showing a side surface in FIG. 7. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Bellows molding part 50 Material pipe installation part 60 Material pipe sealing feed part 70 Material pipe take-out part 80 Control part 13 Fixed side end plate 14 Fixed side end plate 15 Mold body 16 One side split mold 17 The other side split mold 18 Clamp plate 19 Material tube 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)

In the metal bellows molding apparatus that intermittently feeds the material pipe from the material pipe installation part into the bellows molding part and forms a predetermined number of bellows parts at a plurality of locations on the material pipe, the bellows molding part is a pair of split molds The outer periphery of the material pipe is constrained in series in the radial direction with half-slotted holes, and the mold bodies arranged in a large number in the axial direction of the pipe body and the pair of split molds forming the mold body are integrally fixed to each other A clamp plate movably supported by a guide shaft disposed in the tube axis direction, the guide shaft being movable in a direction perpendicular to the tube axis direction, and the clamp plate being detachable from the mold body Clamp plate attaching and detaching cylinder means and a split shaft 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 so that both split molds can be joined or separated from each other Cylinder hand for mold opening / closing Metal bellows forming device for bulging, characterized in that a structure with and.

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