JPH0146218B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an apparatus for manufacturing a strip of irregular cross-section, for example having a convex or concave cross-section.

[Conventional technology]

Conventional manufacturing equipment of this type includes a mold having a shape corresponding to the product to be manufactured, and rolling rolls whose axes are oriented in the longitudinal direction of the material, and a part of the material is placed on the mold. While placing the material, the rolling roll is reciprocated in the width direction of the material to roll the material on the mold, and this rolling is repeated in the longitudinal direction of the material to produce a strip with a desired cross-section. There is something I did.

By the way, as shown in FIG. 16 _, when rolling is performed by moving the rolling roll from one side _W1 of the material W to the other side W2, the material W moves from one side _W1 to the other side. Extends towards part W ₂ . Therefore, the center C of the material W before rolling and the center of the material W' after rolling
This will result in a deviation from C′.

Therefore, in conventional manufacturing equipment, the rolling reduction rate per reciprocation by the rolling rolls is reduced or the material is held down to prevent the center of the material from shifting before and after rolling.

[Problems to be solved by this invention]

However, in the above conventional manufacturing equipment,
It is very difficult to prevent the center of the material from shifting before and after rolling, and it is almost inevitable that some centering will occur. Once the center shift occurs, for example, when manufacturing a strip with a convex cross-section, one side edge of the thick part W _T of the material W is caused by the mold D, as shown in FIG. There was a problem in that the powder was scraped off and pressed against the hem of the side surface, causing indentation flaws, resulting in dimensional defects and internal defects.

[Purpose of the invention]

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an apparatus for manufacturing irregular cross-sectional shapes that can prevent the center of the material from shifting during rolling.

[Structure of the invention]

In order to achieve the above object, the present invention makes the mold swingable around a rotation axis parallel to the longitudinal direction of the material, and engages with the mold to move the rolling rolls of the mold. A stopper is provided to allow rotation in the opposite direction and to prevent rotation in the opposite direction.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7. Note that FIG. 1 is a front view showing a manufacturing apparatus according to the present invention with some of the configuration omitted.

In FIG. 1, reference numeral 1 indicates a lower frame, and reference numeral 2 indicates an upper frame. In the lower frame 1,
A bearing 3 is provided. A mold stand 4 is swingably provided in the center of the bearing 3. A mold 5 is attached to the upper surface of this mold stand 4. As shown in FIG. 2, this mold 5 is for rolling a strip having a convex cross-section and a irregular cross-section, and a material W having a rectangular cross-section is placed on each side of the upper surface of the mold 5.
Projections 6, 6 are formed for rolling both side portions of. The tip of this protrusion 6 is an inclined portion 6a that slopes upward from the tip side to the rear end side, and this inclined portion 6a allows the degree of processing of the material W to be increased as the material W is fed. It is gradually increasing.

Furthermore, stoppers 7 and 8 are provided on each side of the bearing 3 so as to be slidable in the width direction of the material W, that is, in the left-right direction in FIG. These stoppers 7 and 8 are for preventing the mold table 4 from swinging. Both stoppers 7 and 8 are connected to each other, and one stopper 7 and 8 is connected to the bearing 3 and the mold table 4. When the other stoppers 8 and 7 are inserted between the bearing 3 and the mold base 4, the other stoppers 8 and 7 come out from between the bearing 3 and the mold stand 4.

Furthermore, a roller housing 9 is disposed between the lower frame 1 and the upper frame 2. A pair of backup rolls 10, 10 are rotatably supported in the roller housing 9 with their axes directed in the longitudinal direction of the material W. Below between these pair of backup rolls 10, 10, parallel to them and both rolls 10, 1
A rolling roll 11 in contact with 0 is rotatably disposed. This rolling roll 11 is supported by springs (not shown) that bias both ends thereof toward the upper frame 2 side. Then, due to the biasing force of this spring, the back up roll is 10,10
is brought into contact with the upper frame 2, and
Backup rolls 10, 10 and roller housing 9 are supported.

Further, on the side of the housing 9, a clamp shaft 12 is arranged which is rotated by a drive source (not shown). A rod 13 is provided between the crankshaft 12 and the housing 9.
One revolution of the crankshaft 12 causes the rolling roll 11 to reciprocate once in the left-right direction in FIG. 1 via the roller housing 9 and back-up rolls 10, 10. Moreover, the rolling roll 11
When the stoppers 7 and 8 make one reciprocation, the stoppers 7 and 8 move in and out between the bearing 3 and the mold stand 4 once. That is, from the state shown in FIG.
When moves to the right and leaves the right edge of the material W,
The roller housing 9 presses the stopper 7 so that it enters between the bearing 3 and the mold stand 4. At this time, since the stopper 8 is connected to the stopper 7, it comes out from between the mold stand 4 and the bearing 3.
Therefore, the mold stand 4 can rotate in the direction of arrow A, but cannot rotate in the direction of arrow B. On the other hand, when the rolling roll 11 moves leftward from the rightward movement limit position and leaves the left edge of the material W, the stopper 8 is pushed by the roller housing 9 and is placed between the bearing 3 and the mold base 4. At the same time as it enters, the stopper 7 comes out from between the bearing stand 3 and the mold stand 4. In this state, the mold stand 4 can rotate in the direction of arrow B but cannot rotate in the direction of arrow A.

Next, the means for feeding the material W will be explained.

Since only a portion of the material W can be rolled by the reciprocating motion of the rolling rolls 11, a feeding means for feeding the material W in the longitudinal direction is required to process the entire material W. In this case, the means of delivery is
It is desired that the rolling rolls 11 operate in conjunction with the rolling rolls 11 when they pass through each side edge of the material W and are in an unprocessed state.

The third option that meets such requests is
There are those shown in Fig. 4 and Fig. 4, respectively.

The feeding means 14 shown in FIG. 3 rotates a winding machine 15 for winding up the molded product _WG that has been rolled through a belt 17 by a rotary drive source 16 such as a motor, and This is so that tension is constantly applied to the product _WG . Here, belt 17
The frictional force acting between the pulley 15a of the winder 15 and/or the pulley 16a of the rotational drive source 16 is smaller than the holding force on the material W by the rolling roll 11 and the mold 5 during rolling. ing. Therefore, when processing by the rolling roll 11 starts, the material W stops and the rolling roll 1
1 is fed a predetermined length before it passes through the material W and starts rolling again. This feed amount is
For example, it is set to about 1/4 to 1/2 of the length l of the inclined portion 6a of the protrusion 6 in the mold 5.

Further, the feeding means 18 shown in FIG. 4 utilizes a cam mechanism and a ratchet mechanism. That is, the cam 19 is connected to the large gear 2 by the crankshaft 12.
0 and a small gear 21. The ratio of the number of teeth between the large gear 20 and the small gear 21 is set to 2:1. Therefore, the cam 19 is rotated twice when the crankshaft 12 rotates once, that is, when the rolling roll 11 makes one reciprocation. Further, the cam 19 constitutes a positive cam mechanism with the slider 22, and is formed in a shape that moves the slider 22 in the direction of arrow C when the rolling roll 11 is in a non-processing state where the workpiece W is not processed. ing. Then, slider 22 moves to arrow C.
When the slide arm 23 is moved in the direction, the slide arm 23 rotates around its one end, and the claw 24 provided on the slide arm 23 causes the feed roll to rotate around the rotation center of the slide arm 23. 25 is rotated by a predetermined amount in the direction of arrow E, and the molded product W _G is pressed against this feed roll 25 by a pinch roll 26.
is configured to be sent in a predetermined amount. In addition,
When the slider 22 moves in the direction of arrow D, the ratchet mechanism provided on the pawl 24 operates, so that the feed roll 25 is not rotated in the direction of arrow F.

By the way, when the workpiece W is sent, if the workpiece W rises from the mold 5, the guiding action of the protrusions 6, 6 of the mold 5 on the thick portion of the workpiece W is lost, and the workpiece W is lifted up from the mold 5. may shift in the width direction. As a result, a problem arises in that the side edges of the portions of the workpiece W that should be thick are scraped off by the protrusions 6, 6.

Therefore, this manufacturing apparatus is provided with the following lifting prevention means. That is, as shown in FIG.
a is formed. This escape groove 11a and the mold 5
A presser roll 27 is installed between.
Both ends of this presser roll 27 are rotatably and vertically movably supported by a support part 23 provided on the mold stand 4, and are supported by a spring or an air cylinder (none of which is shown). It is biased toward the mold 5 side.

Next, the case where a deformed strip is formed by the manufacturing apparatus having the above configuration will be explained with reference to FIG. 6.

As shown in FIG. 6A, the rolling roll 11
is positioned at the leftward movement limit position.
At this time, the mold base 4 is allowed to rotate counterclockwise, but is prevented from rotating clockwise by the stopper 8. When the roll 11 is moved to the right from this state and rides on the left side edge of the workpiece W, the mold stand 4 is rotated counterclockwise as shown in FIG. 6B. Therefore, the left side portion of the workpiece W is not rolled.

However, as shown in FIGS. 6C and D, when the rolling roll 11 passes through the center of the workpiece W, the rolling roll 11 and the molding die are prevented from rotating clockwise. 5 starts the molding process. At this time, the workpiece W extends from its center toward the right edge, so the center position of the workpiece W does not change.

When the rolling roll 11 passes the workpiece W, the stoppers 7 and 8 begin to move to the right in the figure, and the stopper 7 engages with the mold base 4, while the stopper 8 disengages from the mold base 4. Ru. Therefore, the mold stand 4 cannot be rotated counterclockwise.

When the rolling roll 11 reaches the rightward movement limit position, it begins to move to the left. In addition, rolling roll 1
Although the workpiece W is fed by a predetermined amount from when the workpiece 1 passes through the workpiece W until it reaches the workpiece W again, in FIG. 6, for convenience of explanation, the workpiece W is shown not being fed. When the rolling roll 11 passes through the center of the workpiece W, rolling processing of the workpiece W starts from the center toward the left edge. At this time, it goes without saying that the center position of the workpiece W does not change. When the rolling roll 11 passes the left edge of the workpiece W, the stoppers 7 and 8 start moving rightward, as shown in FIGS. 6G and 6H, and the workpiece W is fed by a predetermined amount. By repeating the above series of operations, FIG.
As shown in E, the forming process of the workpiece W progresses.

Next, other embodiments of the manufacturing apparatus according to the present invention and other examples of molds used in the manufacturing apparatus according to the present invention will be described.

FIG. 8 shows another example of the manufacturing apparatus according to the present invention. The manufacturing apparatus shown in this figure differs from the above embodiment in that the center of rotation of the mold 5 is located at the center of the workpiece W. That is, a bearing recess 3a having a semicircular cross section is formed at the center of the upper surface of the bearing 3, and a semi-cylindrical protrusion rotatably fits into the bearing recess 3a at the center of the lower surface of the mold stand 4. 4a, and the center of curvature O of the bearing recess 3a and the protrusion 4a is located at the center of the workpiece W. Note that the other configurations are similar to those of the above embodiment, and similar parts are denoted by the same reference numerals and explanations thereof will be omitted.

Further, FIGS. 9 and 12 respectively show other examples of molds used in the above-mentioned manufacturing apparatus.

A mold 35 shown in FIG. 9 is also similar to the mold 5 described above in that it is for molding an irregularly shaped strip having a convex cross section. However, the tip portion 36a of the protrusion 36 in this mold 35 has a triangular cross section, and is formed so that its height and width gradually increase from the tip side toward the rear end side. On the other hand, the rear end portion 36b is formed to have a constant height and a width that gradually increases from the front end toward the rear end.

When the material W is molded using the mold 35 having such a configuration, there is an advantage that wrinkles can be prevented from forming on both side edges of the molded product. That is, when molding is performed as described above, as shown in FIG. 10, while the side edges of the material W during processing are inclined with respect to the longitudinal direction of the _material W, The side edges of are parallel to the longitudinal direction of the material W. In other words, the length of the side edge of the material W during processing becomes longer than the length of the side edge of the molded product _WG . Therefore, the side edges of the material W are subjected to compressive force during the process of the material W becoming the molded product _WG . At this time, if the side edges of the material W are soft, it will shrink due to the compressive force, so there is almost no problem, but if the side edges are hard, it will not shrink, and therefore the molded product _W
There is a risk of wrinkles forming on the side edges.

However, when molding is performed using the mold 5 shown in FIG.
Since it has been subjected to rolling processing even before the final stage of _WG , work hardening occurs. For this reason, there is a possibility that wrinkles may be formed on the side edges of the molded product _WG .

In this regard, when molding is performed using the mold 35,
As shown in FIGS. 11A to 11E, the rolling range during forming gradually expands from the center of the material W to the side edges, and the processing of the side edges occurs at the final stage when the material W becomes a molded product. It will be done. Therefore, the side edge of the material W is
It remains soft without work hardening until the final stage. Therefore, wrinkles do not occur on the side edges of the molded product _WG .

Further, the mold 45 shown in FIG. 12 is for molding a strip having an irregular cross section as shown in FIG. 13H. This mold 45 includes protrusions 46, 46 for molding the thin-walled portions on both sides and a protrusion 47 for molding the thin-walled portion in the center. The protrusion 46 is the mold 3 mentioned above.
Since it is the same as the protrusion 36 of No. 5, its explanation will be omitted. The part of the protrusion 47 that is in front of the protrusion 46 is the processed part 47a, and the part that is behind the protrusion 47 is the processed part 47a.
The guide portion 47b is defined as a guide portion 47b. The processing section 47a is
The width thereof gradually increases from the leading end toward the rear end, and the angle of inclination of both side walls with respect to the horizontal plane gradually increases. Moreover, as shown in FIGS. 14 and 15, in an arbitrary cross section in the longitudinal direction of the processed portion 47a, the width of the lower end of the processed portion 47a is set to A ₁ and the inclination angle of the side wall is set to θ ₁ , and the workpiece is Machining section 47 at a location facing backward by the amount of feed per W
When the width of the upper end of a is A ₂ and the inclination angle of the side wall is θ ₂ ,
It is set that A ₁ =A ₂ and tonθ ₁ ≒2tonθ ₂ . Note that the rear end of the processed portion 47a is smoothly connected to a guide portion 47b having the same shape as the thin-walled portion. Further, the distal end of the processed portion 47a is formed such that its height gradually increases from the distal end toward the rear end.

When molding is carried out using the mold 45 having such a protrusion 47, as shown in FIGS. 13A to 13H or 15A to The wall between the
A wall surface having a desired inclination angle (including a case where the inclination angle is a right angle) can be formed, and the wall surface will not be scraped off, so that indentation scratches etc. due to the scraped chips will not occur. can be prevented.

In the above embodiment, two stoppers 7 and 8 are provided, but the engagement points of the stoppers with respect to the mold base 4 are changed depending on the moving direction of the rolling roll 11, so that one engagement point When engaged with the other engagement point, the mold base 4 is allowed to rotate in one direction and is prevented from rotating in the other direction, and when engaged with the other engagement point, it is allowed to rotate in the other direction. If it is configured to allow rotation in one direction and prevent rotation in one direction, only one stopper is sufficient.

〔Effect of the invention〕

As explained above, according to the apparatus for manufacturing strips with irregular cross-sections of the present invention, the mold is made swingable around the rotation axis parallel to the longitudinal direction of the material, and moreover, the mold is engaged with the mold, Since a stopper is provided to allow rotation in the opposite direction to the moving direction of the rolling rolls of the die and to prevent rotation in the same direction, the material can be rolled from the center to each side edge. Therefore, the material stretches from the center toward each side edge, and it is possible to prevent the center position from shifting before and after rolling. and,
As a result, thick parts due to center deviation are removed,
Alternatively, effects such as being able to prevent the occurrence of indentation flaws on the side surface of the thick portion can be obtained.

[Brief explanation of drawings]

Figures 1 to 6 show one embodiment of the present invention, with Figure 1 being a front view with some parts omitted, Figure 2 being a perspective view showing the mold, Figures 3 and 4. 5 is a schematic configuration diagram showing an example of the feeding means, FIG. 5 is a perspective view showing the lifting prevention means, and FIGS. 6 A to H
7A to 7E are diagrams showing the progress of processing using the mold shown in FIG. 2.
FIG. 8 is a schematic configuration diagram showing another embodiment of the invention, FIGS. 9 and 12 are perspective views showing other examples of the mold used in the manufacturing apparatus of the invention, and FIG. A plan view showing the material being molded by the mold shown in FIG. 2, FIGS. 11 A to E, and 13.
Figures A to H are diagrams showing the progress of processing the material by the molds shown in Figures 9 and 12, respectively, and Figure 14 shows the progress of processing the material by the protrusion in the center of the mold shown in Figure 12. 15 is a diagram showing the processing progress of the material by the protrusion in the center of the mold shown in FIG. 12, FIG. 16 is a diagram showing the rolling principle of the conventional manufacturing equipment, and FIG. The figure is a diagram showing the relationship between the raw material and the mold when molding is performed by a manufacturing apparatus equipped with the rolling principle shown in FIG. 16. 5, 35, 45... Mold, 6, 36, 46, 4
7... protrusion, 7, 8... stopper, 11... rolling roll.

Claims (1)

[Claims] 1 A mold on which a part of a long strip-shaped material that is fed intermittently in the longitudinal direction is placed; In a manufacturing device having an irregular cross-sectional shape, the mold is provided with a rolling roll that cooperates with the mold to roll the material, and the mold is swingable about a rotation axis parallel to the longitudinal direction of the material. None, and a cross section characterized in that a stopper is provided that engages with the mold and allows the mold to rotate in the opposite direction to the moving direction of the rolling rolls, and prevents rotation in the same direction. Manufacturing equipment for irregularly shaped strips.