JPH0696269B2 - Prepreg sheet stepped cylinder manufacturing equipment - Google Patents

Description

The present invention relates to a prepreg sheet stepped cylinder manufacturing apparatus,
In particular, it is possible to automatically make a stepped cylinder from one prepreg sheet, and a stack of finished stepped cylinders is used in fields requiring lightweight and high strength such as aerospace equipment, high speed rotating equipment or automobiles. It

Here, the prepreg sheet refers to a sheet formed by impregnating glass fiber or carbon fiber with a thermosetting resin and performing a curing treatment.

[Prior Art] Generally, when manufacturing a cylinder having a partially different diameter as shown in FIG. 18 to FIG. 19 or FIG. 20, a prepreg sheet b is attached to a winding mandrel a having the same inner diameter shape. It is necessary to wind and laminate, and then to harden it, but due to the step, it is very difficult to wind mechanically and manually.

Therefore, if this is dared to be done, the winding work becomes a manual work, but as shown in FIG. 22, the sheet c cut in the fiber direction in order to maintain the strength is cut into a winding mandrel a shown in FIG. As indicated by d, a twist is made in the axial direction and the layers are sequentially wound, the entire circumference is covered, one layer is completed, and the layers are repeatedly laminated.

However, in this method in which the prepreg sheet is cut into long pieces and wound around the winding mandrel, there is a problem in strength because a gap e is formed at the joining portion of the sheet c as shown in FIG.

For this reason, it is possible to further divide the prepreg sheet into smaller gaps, but not only the workability is further lowered, but it is impossible to completely fill the gaps.

[Problems to be Solved by the Invention] As described above, in the conventional case, the winding is a manual work, and when the long and narrow linear cutting is performed in the fiber direction to wind the sheet, the sheet is wound. There was a problem that a gap was created at the mating part of.

Therefore, an object of the present invention is to solve the above-mentioned conventional problems and to automatically wind a single prepreg sheet around a winding mandrel without straight cutting to form a stepped cylinder. An object of the present invention is to provide a stepped cylinder manufacturing apparatus.

[Means for Solving Problems] In the apparatus for manufacturing a prepreg sheet stepped cylinder of the present invention, a table for spreading a prepreg sheet to be a stepped cylinder is a large-diameter portion table corresponding to the stepped cylinder. It is divided in the width direction into a table for a small diameter portion. A gap and a step can be formed by relative movement between the large diameter table and the small diameter table. The gap formed between the large diameter table and the small diameter table is for loosening a part of the prepreg sheet that straddled this table at the time of separation so as to correspond to the diameter difference of the stepped cylinder at the time of uniting. Yes, the step is
This is for raising the formed slack portion along this step.

On such a table surface, a suction port for guiding a negative pressure to the stretched prepreg sheet to suck and fix the prepreg sheet is formed. A winding mandrel having a large-diameter portion and a small-diameter portion that match the table formed by uniting them rolls on the table so as to wind the prepreg sheet around the outer periphery of the winding mandrel, and the winding means winds the winding mandrel. The prepreg sheet is wrapped around the mandrel.

[Operation] After the prepreg sheet cut into a predetermined shape is spread on the table with relative movement to form a gap, a negative pressure is applied to the part of the spread prepreg sheet on the table for the small diameter part through the suction port. When guided, the prepreg sheet is sucked and fixed on the table surface with a part of the prepreg sheet straddling the gap formed between the large diameter table and the small diameter table.

After this suction-fixing, the two tables are united by relative movement and are displaced vertically to form a step, and when a negative pressure is introduced through the suction port of the large-diameter part table, the gap between the two tables has been increased until now. The straddling seat portion is slackened, and the slack portion rises along the step, so that the prepreg sheet fits the stepped table without any slack or tension even at the step.

In this way, the prepreg sheet fitted to the stepped table is wound around the outer circumference of the winding mandrel rolling on the table with the help of the winding means to form a stepped cylinder.

[Embodiment] The embodiment of the present invention will be described below with reference to FIGS. 1 to 17.

15 to 17 show an example of an apparatus for producing a prepreg sheet stepped cylinder of the present invention. Here, the shape of the stepped cylinder will be described as a one-step cylinder having a large diameter in the center and small diameters on both sides.

Reference numeral 1 is a table for spreading a prepreg sheet, and the table is supported on a bed 2. This bed 2
Rails 3, 3 are arranged on both sides of the rail 3 along its longitudinal direction, so that the roll transfer carriage 4 straddling the bed 2 in the width direction travels on the rails 3, 3 by the drive of the carriage motor 5. Has become.

A winding mandrel 6 around which the prepreg sheet is wound, a shaping roll 7 for shaping the wound prepreg sheet, and an idle roll for winding (not shown) are mounted on the roll transfer carriage 4 so as to be vertically movable and rotatable. The winding mandrel 6 is supported horizontally across the table 1 by mandrel bearing boxes 9 and 9 provided opposite to each other, and a pair of mandrel lifting ball screws connected by a mandrel lifting connecting shaft 10. 11,11
It moves up and down with the bearing boxes 9 and 9 that move up and down by the rotation of.
That is, the mandrel drive motor 12 causes one ball screw
When 11 is rotated, this rotation is transmitted to the other ball screw 11 via the connecting shaft 10 and the ball screw 11 is synchronously rotated, so that the winding mandrel 6 can be raised and lowered while maintaining the horizontal position.

The shaping roll 7 is located directly above the winding mandrel 6 and is supported by the shaping roll bearing boxes 13 and 13. Like the winding mandrel 6, the shaping roll 7 is driven by a shaping roll drive motor.
14, the shaping roll lifting ball screws 15 and 15 and the shaping roll lifting connection shaft 16 are used for lifting.

Also, an idle roll (not shown) can be raised and lowered by a similar ball screw mechanism.

By the way, FIG. 1 is a drawing in which the above-mentioned bed 2, roll transfer carriage 4 and the like are omitted for easy understanding of the whole example of the apparatus,
I will explain further along this line.

The table 1 is divided into three in the width direction, and includes a central table 20 corresponding to the large diameter portion of the stepped cylinder and left and right side tables 21 and 21 corresponding to the small diameter portions on both sides. As shown in FIG. 10 or FIG. 11, the central table 20 has a fixed center frame 22.
It is supported up and down freely. That is, the piston rod
23 is fixed to the central table 20, and the lifting piston
24 is housed in a hydraulic chamber 25 provided in the center frame 22, and a lifting piston 24 that moves up and down by sucking and discharging hydraulic pressure from a port 26 leading to the upper hydraulic chamber and a port 27 leading to the lower hydraulic chamber 24 Central table 20 is driven by.
As a result, the raised position is flush with the winding belt 28 on the left and right tables 21, 21 and the lowered position forms a step corresponding to the diameter difference of the stepped cylinder.

Further, the left and right tables 21, 21 are provided so as to be movable in the width direction. That is, the piston rod 30 is fixed to the center frame 22, and the width-direction moving piston 31 is housed in the hydraulic chamber 32 provided in the left and right tables 21, 21, and the port 33 communicating with the front hydraulic chamber and The left and right side tables 21, 21 are driven by a width-direction moving piston that moves by sucking and discharging hydraulic pressure from a port 34 that communicates with the rear hydraulic chamber. As a result, a slack portion of the prepreg sheet 40 that is to be straddled between the tables at the separated position to serve as a stepped rising portion is formed, and the slack is formed on the step formed between the prepreg sheet 40 and the central table 20 that is at the lowered position at the united position. It is designed to line up the divisions.

Although the central table 20 is moved up and down and the left and right tables 21 and 21 are moved in the width direction here, the present invention is not limited to this, and it is sufficient that the above-described positional relationship can be achieved by relative movement. Therefore, for example, the central table 20 may be fixed, and the left and right tables 21, 21 may have the functions of the widthwise movement and the vertical movement at the same time. Also, the moving means is not limited to the piston hydraulic means described above.

At the position where the prepreg sheet 40 on the upper surfaces of the central table 20 and the left and right side tables 21, 21 should be spread,
As shown in FIG. 11 to FIG. 11, a large number of suction ports 35 are provided, and the suction ports 35 are communicated internally by a communication path leading to the exhaust port 36 and communicated with the exhaust port 36 (not shown). This makes it possible to evacuate the back surface of the prepreg sheet spread on the table 1.

Further, winding belts 28, 28 are placed on the upper surfaces of the left and right tables 21, 21 along the longitudinal direction thereof. One end is fastened to the tip of the left and right side tables 21 and 21 with clamps 37 and 37, and is attached to the other end protruding from the base end of the left and right side tables 21 and 21 via the tension rollers 50 and 50. The wrapping belt tension weights 38, 38 are attached, and the middle of the wrapping belt tension weights 38, 38 can be lifted by the idle roll 8 and stretched on the left and right side tables 21, 21. This winding belt 28, 28 also has a suction port 35 provided on the upper surface of the left and right tables 21, 21.
There are a number of suction ports in communication with. However,
If the belts 28, 28 are made of a porous material having air permeability, the suction port becomes unnecessary.

The winding mandrel 6 described above has a large-diameter portion in the center and small-diameter portions on both sides as shown in FIG. 1, the large-diameter portion is slightly narrower than the central table width, and the diameter difference is stepped. It is designed according to the diameter difference of the cylinder. As shown in FIG. 14, the shaping roll 7 has a small-diameter portion at the center and a large-diameter portion on both sides so as to mesh with the winding mandrel 6. The idle roll 8 has a slightly smaller diameter and is designed to have substantially the same shape as the shaping roll 7, and is positioned behind the winding mandrel 6.

As shown in FIG. 2 or 3, the idle roll 8
Is retracted into the idle roll groove 39 provided on the base end side of the left and right tables 21, 21 at the backward limit, and the prepreg sheet 40
The wrapping belts 28, 28 are prevented from being lifted at the time of expansion so that the flatness of the prepreg sheet 40 is not impaired.

Next, the operation of the above configuration will be described.

As shown in FIG. 2, FIG. 6 or FIG. 7, first, the winding mandrel 6 and the shaping roll 7 are held in a state of being floated on the table 1 in front of the idle roll groove 39 near the base end of the table. To do. For this purpose, as shown in FIGS. 15 to 16, the roll transfer carriage 4 equipped with these rolls is positioned at the backward limit of the solid line. Then, the pair of ball screws 11, 11 and 15, 15 for the mandrel and the shaping roll are synchronously rotated by the drive motors 12, 14 via the connecting shafts 10, 16, respectively, and the bearing boxes 9, 9 for the mandrel facing each other. Also, the shaping roll bearing boxes 13 and 13 are raised in parallel, and the winding mandrel 6 and the shaping roll 7 are raised.

In addition, the center table 20 is lifted and the left and right side tables 21, 21 are separated from the center table 20 and opened, and then the idle roll 8 is moved to the left and right side tables 21, 2.
It is dropped into the idle roll groove 39 provided at the base end of 1.
For this reason, as shown in FIG.
A hydraulic pressure is applied from the port 33 to the front hydraulic chamber of 31 and the hydraulic pressure is released from the rear hydraulic chamber via the port 34 so that the left and right tables 21 and 21 correspond to the diameter difference of the stepped cylinder. Just move it outward in the width direction. Further, hydraulic pressure is applied to the lower hydraulic chamber of the lifting piston 24 from the port 27, and hydraulic pressure is released from the upper hydraulic chamber via the port 26 to wind the central table 20 onto the left and right side tables 21, 21. Raise it until it becomes flush with the attached belts 28, 28. The idle roll 8 is dropped into the idle roll groove 39 by lowering the idle roll bearing box by the reverse operation of the winding mandrel 6 or the shaping roll 7 described above.

In this way, when the central table 20 is raised, the left and right side tables 21, 21 are opened, and the idle roll 8 is lowered, the winding belts 28, 2 released from the idle roll 8 are released.
The winding belt tension weights 38, 38 are stretched on the surfaces of the left and right side tables 21, 21 without any gap, and the upper surface of the table 1 including the winding belts 28, 28 and the central table 20 is flat. In addition, the central table 20 and the left and right side tables
Gap 45,45 (No. 10) corresponding to the diameter difference of the stepped cylinder between 21,21
(Fig.) Is formed, and the gaps 45, 45 are covered by the edges of the winding belts 28, 28.

Then, with the upper surface of the table 1 being flat, one prepreg sheet 40 cut into a predetermined shape is spread at a predetermined position on the upper surface of the table 1. And left and right side tables 21,2
By exhausting from the exhaust port 36 of 1, the negative pressure is introduced to the back surface on both sides of the prepreg sheet 40 via the suction port 35, and this is sucked and fixed onto the winding belts 28, 28 of the left and right tables 21, 21.

Therefore, the prepreg sheet 40 fixed to the upper surface of the table 1 has, in a part thereof, the gaps 45, 45 corresponding to the diameter difference of the stepped cylinder formed between the central table 20 and the left and right side tables 21, 21. It will have a straddling part.

Next, as shown in FIG. 3 and FIG. 8, the central table 20 is lowered, and air is exhausted from the exhaust port 36 of the central table 20, so that the back surface of the central portion of the prepreg sheet is made into a negative pressure via the suction port 35. To do. Left and right side table 2 at the same time
Combine 1,21 together on the central table 20. For this,
As shown in FIG. 11, contrary to the above, the hydraulic pressure is applied from the port 26 to the upper hydraulic chamber of the lifting piston 24 and the hydraulic pressure is released from the lower hydraulic chamber via the port 27. Then, the central table 20 is lowered by the diameter difference of the stepped cylinder. Further, hydraulic pressure is applied from the port 34 to the rear hydraulic chamber of the width direction moving piston 31, and hydraulic pressure is released from the front hydraulic chamber via the port 33 to move the left and right side tables 21, 21 in the width direction. Move towards.

When the left and right side tables 21, 21 are closed while lowering the central table 20 to which negative pressure is applied in this manner, the central portion of the prepreg sheet 40 is deformed into a concave shape without tension or slack, and the central table 20 is formed. It is fixed by adsorption. That is, when the left and right side tables 21, 21 are closed, the seat portion straddling the gaps 45, 45 described above is loosened, and this loosened portion 46 (FIG. 11) is lowered by the central table 20 so that the left and right side tables 21, 21. The steps 47, 47 formed between the first and second parts 21 and 21 make it possible to start up smoothly.

Thereafter, as shown in FIGS. 4, 5, and 9, the winding mandrel 6 is lowered onto the upper surface of the table 1, the idle roll 8 is raised, and the shaping roll 7 is lowered to an appropriate pressing position. For this purpose, as shown in FIGS. 15 to 16 again, the mandrel drive motor 12 causes the mandrel lifting ball screws 11, 11 to rotate synchronously in the opposite direction to the above-described direction to lower the winding mandrel 6. It contacts the upper surface of the table 1. Similarly, the shaping roll raising / lowering ball screws 15 and 15 are rotated in anti-synchronism by the shaping roll driving motor 14 to descend, and placed on the winding mandrel 6. Similarly, the idle roll 8 is also lifted from the idle roll groove 39 by the operation of the ball screw mechanism, and is raised to a position where its axis matches the axis of the winding mandrel 6.

When the idle roll 8 is lifted in this way, the base ends of the winding belts 28, 28 stretched on the left and right tables 21, 21 are lifted, and a part of them is lower than the winding mandrel 6. It will be wrapped around.

In this state, the carriage motor 5 is driven to drive the roll transfer carriage 4
Is moved on the rails 3, 3 toward the tip of the table. As a result, the rolls 6, 7, 8 roll together in the direction of arrow A shown in FIG. 4 or FIG. 9, and from the time when the winding mandrel 6 contacts one end of the prepreg sheet 40. The prepreg sheet 40 starts to be wound around the winding mandrel 6 by lifting the winding belts 28, 28. In this process, the prepreg sheet 40 is rolled between the winding mandrel 6 and the central table 20 as shown in FIG.
Adjust the circumference according to the difference between the diameters D ₁ and D ₂ of the stepped cylinder in the figure. When the winding mandrel 6 rolls and the winding portion reaches the position of the shaping roll 7, as shown in FIG. 14, the rising portion 41 of the prepreg sheet 40 attached to the winding mandrel 6 is formed.
Are shaped by the shaping roll 7. When the rolls 6, 7, 8 are rolled to the position of two-dot chain line in FIG. 7 or 9 (two-dot chain line in FIG. 15 or 16) and stopped, the prepreg sheet 40 is attached to the winding mandrel 6. The cylindrical one-layer winding is successfully completed, and by repeating this, a cylinder having a required stacking amount can be formed.

As described above, according to this embodiment, the prepreg sheet 40 is simply stretched at a predetermined position on the table 1, and the winding is automatically completed thereafter. You don't have to rely on it. In particular, by adding a device for automatically spreading the prepreg sheet on the table, unmanned operation becomes possible.

In addition, the table is divided into the center table and the left and right side tables, and it is possible to make a recess in one prepreg sheet without difficulty by moving them, so that the matching part should be perfectly matched when making a stepped cylinder. Even one layer can be wound up on the winding mandrel, and therefore, the prepreg sheet is not cut into long pieces and wound around the winding mandrel, and no gap is formed at the sheet joining portion.

Furthermore, since the prepreg sheet stretched on the table is fixed by suction, the prepreg sheet will not be displaced during winding, and the winding belt lifted by the idle roll during winding. Gives a large winding angle to the prepreg sheet, so that the prepreg sheet can be wound around the winding mandrel very smoothly.

Furthermore, while rolling the prepreg sheet between the central table and the winding mandrel to match the circumferential length to the large diameter portion of the step, the rising portion of the prepreg sheet wound on the winding mandrel is used as a shaping roll. Since it is properly shaped, the mating parts can be accurately matched without any gaps or overlaps.

As described above, according to the present embodiment, it is possible to obtain a cylindrical product with significantly improved productivity and an extremely high quality.

[Effects of the Invention] In short, according to the present invention, one prepreg sheet is spread in a stepped shape without dividing the table and causing tension or unnecessary slack in the stepped table formed by the relative movement of the table. Since this is wound around the outer circumference of the stepped winding mandrel, it is possible to automatically make a stepped cylinder with one prepreg sheet without cutting straight lines, which is an excellent effect. .

[Brief description of drawings]

1 to 17 show an embodiment of a manufacturing apparatus for a prepreg sheet stepped cylinder of the present invention. FIG. 1 is a perspective view showing the basic structure, and FIGS. 2 to 4 are basic. FIG. 5 is an enlarged view of the principal part of FIG. 4, FIG. 6 is a sectional view taken along the line VI-VI of FIG. 2, and FIG. 7 is VII-VII of FIG.
8 is a sectional view taken along the line VIII-VIII of FIG. 3, FIG. 9 is a sectional view taken along the line IX-IX of FIG. 4, and FIG. 10 is taken along the line X- of FIG. X-ray arrow cross-sectional view, FIG. 11 is a cross-sectional view taken along the line XI-XI of FIG. 3, FIG. 12 is a cross-sectional view taken along the line XII-XII of FIG.
FIG. 13 is a perspective view showing a state in which the prepreg sheet is completely wound around the winding mandrel, FIG. 14 is a view taken along the line XIV in FIG. 5, and FIG. 15 is a plan view showing a specific overall structure. FIG. 16 is a front view of the same, FIG. 17 is a side view of the same, FIGS. 18 to 20 are views showing examples of cylinders with partially different diameters, and FIGS. 21 to 23 are conventional stepped cylinders. It is explanatory drawing of a manufacturing method. In the figure, 1 is a table, 6 is a winding mandrel, 8, 28, 38
Is an idle roll constituting a winding means, a winding belt, a winding belt tension weight, 20 is a central table, 21 is a left and right side table, 35 is a suction port as a suction port, 40 is a prepreg sheet, 45 is a gap, 46 Is a slack portion, and 47 is a step.

Claims (1)

[Claims] 1. A table for expanding a prepreg sheet to be a stepped cylinder, which is divided into a large diameter part table and a small diameter part table corresponding to the stepped cylinder, and a large diameter part table by being separated from each other. And a step for loosening a part of the prepreg sheet that straddled between the small diameter table and the table for the small diameter portion at the time of uniting to correspond to the diameter difference of the stepped cylinder, and a step for raising the formed slack portion are formed by relative movement Possible table and
A suction port for attracting and fixing the prepreg sheet by guiding a negative pressure to the expanded prepreg sheet formed on the table surface;
A winding mandrel having a large-diameter portion and a small-diameter portion that match the above-mentioned table formed by uniting and rolling on the table so as to wind the outer periphery of the prepreg sheet, and a prepreg sheet on the winding mandrel. An apparatus for manufacturing a prepreg sheet stepped cylinder, comprising: winding means for winding.