JP2002337020A - Flange remover and flange removing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flange remover capable of removing a flange from its root without leaving a cutting remainder, even if there is dispersion in the dimension of works. SOLUTION: This flange remover removes the flange formed in a flange formation surface 142a expanding outward of the work 142 of an advance/ retreat line of a press blade 134 in the advancing side than a retreat side of an advancing/retreating cope 126. This device is provided with the advancing/ retreating cope 126, the press blade 134 attached to the cope 126 displaceable in the outside direction of the work 142 placed orthogonally to the advance/ retreat line of the cope 126, and a leaf spring 126 energizing the press blade 134 in the inside direction of the work 142.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an apparatus and a method for removing a flange projecting from a work from a root.

[0002]

2. Description of the Related Art In order to connect an extruded material such as aluminum or an aluminum alloy with another member, a flange extending from the extruded material is often formed integrally with the extruded material. In this case, the flange is formed over the entire length of the extruded material. However, the flange only needs to be present at a portion connected to another member, and the flange at other portions is unnecessary. Therefore, unnecessary portions of the flange are often removed by press working. JP-A-8-19222
Japanese Patent Application Publication No. 2000-131873 discloses a technique in which a movable die is added to a fixed extrusion die so that a flange is formed at a necessary portion in a length direction and a flange is not formed at an unnecessary portion. Is disclosed.

[0003]

Problems to be Solved by the Invention
According to the technique described in JP-A-21, there is no need to remove unnecessary flange portions after extruding the extruded material. However, this technique requires complicated extrusion dies and increases equipment costs. Often, it is more suitable to extrude a uniform cross section using a simple extrusion die and then remove unnecessary portions. However, when an unnecessary flange portion is removed by pressing after extruding with a uniform cross section, the flange cannot be removed from the root of the flange in many cases due to variations in the dimensions of the extruded material. There is a problem that the cutting residue is apt to occur at the root.

[0004] The present invention is an improvement of the conventional technique of removing a flange by press working, and the flange can be removed from the base so that even if there is a variation in the size of the work, no cutting residue occurs. It is an object to realize a removing device and a flange removing method. INDUSTRIAL APPLICABILITY The present invention is widely used when a flange extending from a work is removed from a root, and an object is not limited to an extruded material. The above-described example of the extruded material is an example for convenience of understanding.

[0005]

Means for Solving the Problems and Action and Effect According to one aspect of the present invention, there is provided a flange forming apparatus in which a pressing die that advances and retreats is formed on a forward side of a retreating side of the press die, and a flange is formed to extend outside the work beyond a reciprocating line of a press blade. A device for removing a flange formed on a surface, comprising: a press die that moves forward and backward; a press blade that is mounted on the press die so as to be displaceable in a direction outside the work perpendicular to the line of advance and retreat of the press die; An urging means for urging inward is provided. Here, the "press blade attached to the press die" referred to in the claims
This includes not only the case where the press blade is attached directly to the press die but also the case where it is indirectly attached to the press die, that is, the case where the press blade is attached to another member attached to the press die. The present inventor is free from the common sense in the conventional press working of rigidly moving the press blade forward and backward to remove the flange, and the press blade can be displaced in the outward direction of the work orthogonal to the advance / retreat line of the press die. By doing so, a flange removing device that does not generate cutting residue is realized. According to this device, when the press die is advanced, the press blade attached to the press die contacts the flange forming surface. When the press die is further advanced, a force in the outward direction of the work perpendicular to the line of advance and retreat of the press die is applied to the press blade from the flange forming surface, and the press blade that has been urged inward by the urging means,
Displaced outward of the work. As a result, when the press die is further advanced, the press blade moves along the flange forming surface and is positioned at the root of the flange formed on the flange forming surface. When the press die is further advanced, the press blade can be positioned at the base of the flange and the flange can be removed, so that no cutting residue remains.

[0006] The present invention also provides a flange removal method. This method is a method of removing a flange formed on a flange forming surface that spreads outside a work more than a reciprocation line of a press blade on a forward side than a retreat side of a press die that advances and retreats. The side is brought into contact with the flange forming surface of the workpiece, and then the press blade is advanced along the flange forming surface to position the press blade at the root of the flange and remove the flange. According to this method, since the flange can be removed by positioning the press blade at the root of the flange, there is no remaining cutting.

According to another aspect of the present invention, there is provided a flange removing device.
An apparatus for removing a flange formed on a flange forming surface of a work, comprising: a press die that moves forward and backward; a press blade mounted on the press die so as to be displaceable in a direction orthogonal to the advance / retreat line of the press die; An urging means for urging outwardly, a guide portion for moving the press blade toward the work at the height of the flange, and a positioning portion for positioning the flange forming surface at a predetermined distance from the guide portion are provided. According to this device, when the press die is advanced, the press blade attached to the press die moves toward the work by the guide portion at the height of the flange. For this reason, if the distance between the guide portion and the flange forming surface is adjusted by the positioning portion to the distance at which the press blade is positioned at the root of the flange at the height of the flange, the flange can be removed from the root. As a result, no cutting residue occurs. on the other hand,
At a height other than the height of the flange, the press blade is positioned outside the work by the urging means that urges the press blade toward the outside of the work, thereby preventing the work other than the flange from being cut off.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) The structure of a flange removing device according to a first embodiment will be described with reference to FIGS. 1 to 3 are cross-sectional views of the flange removing device before, immediately before, and after removing the flange, respectively. As shown in FIGS. 1 to 3, the flange removing device according to the first embodiment includes a base 122 and a lower mold 1 fixed to the base 122.
36 and guide post 124, and guide post 124
And an upper die (an example of a press die) 126 that can be guided in the vertical direction and move forward and backward in the figure.

A work 142 is placed on the lower die 136. The work 142 is formed by extruding aluminum or an aluminum alloy from an extrusion die. The work 142 has a structure having two hollow portions, and is used, for example, as a cross member or the like forming a body frame. When the work 142 is placed on the lower mold 136, the flange forming surface 142a of the work 142
The press blade 1 on the forward side of the upper die 126 that advances and retreats from the retreat side
It extends outside the work 142 beyond the line 34. The lower end of the flange forming surface 142a has a flange 14
2b are formed.

The guide posts 124 are further provided with guide posts on the rear sides of the two guide posts 124 shown, respectively, and a total of four guide posts 124 are provided. The T-shaped upper die (an example of a press die) 126 can be moved forward and backward by being guided by these guide posts 124. The upper die 126 has a press blade holding portion 126a extending downward and a pad support portion 137. A press blade 134 is attached to a lower end of the press blade holding portion 126a. The press blade holding portion 126 a and the press blade 134 are respectively provided with the leaf springs 12 along the direction in which the upper die 126 moves forward and backward.
8 are attached. A plurality of bolt holes 130 are communicated with the press blade
Is provided. A deflection adjusting bolt 132 is attached to one of the bolt holes 130. The leaf spring 128 is more easily bent as the mounting position of the bending adjustment bolt 132 is higher. By attaching the leaf spring 128 to the press blade holding portion 126a and the press blade 134 in this way, the press blade 134 is attached to the press blade holding portion 126a with play, and the press blade 134
Can be displaced in the outward direction of the work 142 perpendicular to the line of advance and retreat of the upper mold 126. The pad 1 is connected to the pad support 137 via a guide 138 and a spring 139.
40 are supported. The upper mold 126 moves forward and the pad 1
When the spring 40 contacts the upper surface of the work 142, the spring 1
The work 142 is fixed by the pressing force of the work 39.
Note that an urging member such as urethane may be used instead of the spring 139.

Next, the operation of the flange removing device of the first embodiment will be described with reference to FIGS. As shown in FIG. 1, when the upper die 126 is moved forward (downward in the figure) toward the work 142, the cutting edge of the press blade 134
42, the flange forming surface 1 on the retreat side from the flange 142b
42a. Note that at the time of FIG.
Has not yet contacted the upper surface of the work 142. Subsequently, when the upper mold 126 is further advanced, the press blade 134
Receives a force from the flange forming surface 142a toward the outside of the work 142 (to the right in the drawing). As a result, the leaf spring 128 also receives a force in the direction outside the work 142 through the press blade 134. Then, the leaf spring 128 bends toward the outside of the work 142 against the force urging inward of the work 142, and accordingly, the press blade 134 also moves the press blade 134.
42 Deflected outward. In this way, the upper mold 126
As the blade advances, the cutting edge of the press blade 134 moves outside the work 142 along the flange forming surface 142a inclined with respect to the advance / retreat line. As shown in FIG. 2, when the cutting edge of the press blade 134 reaches the lower end of the flange forming surface 142a in this state, the cutting edge of the press blade 134 is positioned at the base of the flange 142b. Subsequently, the upper mold 126
Is further advanced, as shown in FIG.
4 removes the flange 142b from the root of the flange 142b. During the transition from the state shown in FIG. 1 to the state shown in FIG.
The work 142 is fixed by the holding force of No. 9. Further, the size of the work 142 varies, and as shown by reference numeral 142c in FIG.
Even if the root of b slightly protrudes from the lower mold 136, the work 142 is formed of aluminum or an aluminum alloy or the like, so that the work 142 has considerable hardness, and the work 142 is fixed by the pad 140. And the flange 142b can be reliably removed.

As described above, according to the apparatus of the first embodiment,
Since the flange 142b can be removed from the root of the flange 142b, there is no remaining cutting.

(Second Embodiment) Next, the structure of a flange removing device according to a second embodiment will be described with reference to FIGS.
4 to 6 show before flange removal, immediately before removal,
It is sectional drawing of the flange removal apparatus after removal. FIG. 7 shows FIG.
It is an enlarged view near the flange of the flange removal apparatus of FIG. As shown in FIG. 4, the flange removing device of the second embodiment can move up and down in the illustrated vertical direction guided by the guide post 224, the lower die 236 and the guide post 224 fixed to the base 222. An upper die 226 and a guide stand 250 and the like installed on the base 222 so as to be movable in the horizontal direction in the figure are provided.

A work 242 is placed on the lower mold 136. The work 242 is formed by extruding aluminum or an aluminum alloy from an extrusion die. The work 142 has a structure having one hollow portion, and is used, for example, as a member constituting a part of a vehicle body frame. When the work 242 is placed on the lower mold 236, the flange forming surface 242a of the work 242 is parallel to the direction in which the upper mold 226 moves (vertical direction in the drawing). A flange 24 is provided at an intermediate portion of the flange forming surface 242a.
2b is formed.

The guide posts 224 are each further provided with a guide post on the rear side of the two guide posts 224 shown in the figure, and a total of four guide posts 224 are provided. The upper die (an example of a press die) 226 is guided by these guide posts 224 so as to be able to move up and down in the drawing. The upper die 226 includes a press blade holding portion 244 extending downwardly attached by a pin 246,
It has a pad support 237. The press blade holding part 244 is
The pin 246 can be displaced about the pin 246 in a direction (horizontal direction in the drawing) orthogonal to the advance / retreat line of the upper mold 226. A first protrusion 244a is formed on a lower side surface of the press blade holding portion 244. First protrusion 244 of press blade holder 244
The press blade 23 is provided on the lower side surface opposite to the side where a is formed.
4 are attached. The press blade 234 is attached such that its blade edge is at the same height as the tip of the first protrusion 244a. A tension spring 248 is attached between the press blade holding portion 244 and the spring fixing portion 226a of the upper die 226, and the press blade holding portion 244 is provided with a tension spring 248.
The work 242 is urged outward (to the right in the drawing). The pad 240 is supported by the pad support 237 via a guide 238 and a spring 239. The upper die 226 moves forward and the pad 240 moves to the work 242.
The workpiece 242 is fixed by the pressing force of the spring 239. The spring 2
An urging member such as urethane may be used instead of 39.

The guide table 250 has a guide portion 250a having a guide surface 250b on which a second protrusion 250c is formed,
A positioning portion 250d for positioning the flange forming surface 242a at a predetermined distance from the guide surface 250b is provided.
The second protruding portion 250c of the guide surface 250b is provided at a position where the tip thereof is substantially at the same height as the upper surface of the flange 242b of the work 242. The guide table 250 is movable in the left-right direction in the figure, and the apparatus is operated in a state where the guide table 250 is moved to a position where the end surface of the positioning portion 250d contacts the flange forming surface 242a. The positioning portion 250d positions the distance between the guide surface 250b and the flange forming surface 242a to be the distance E, as shown in FIG. 7 which is an enlarged view near the flange 242b. Here, the distance E is the width A of the press blade 234, the width B of the press blade holder 244, the width C of the first protrusion 244a of the press blade holder 244, and the second protrusion 250c of the guide 250. Is the total distance of the width D. That is, the distance E between the guide surface 250b and the flange forming surface 242a is
When the first protrusion 244a rides on the second protrusion 250c, the distance is such that the cutting edge of the press blade 234 is just located at the root of the flange 242b. Further, the positioning portion 250d is connected to the flange forming surface 242a of the work 242.
, As shown in FIG.
The size of the work varies and the work 24
Even if 2 is protruded by the width F, the guide surface 25
0b and the flange forming surface 242a can always be the same distance E.

Next, the operation of the flange removing apparatus according to the second embodiment will be described with reference to FIGS. As shown in FIG. 4, when the upper die 226 is moved forward (downward in the figure) toward the work 242, the first protrusion 24 of the press blade holding portion 244 is
4a advances linearly along the flat surface of the guide surface 250b of the guide table 250. Accordingly, the press blade holding unit 24
The press blade 234 held at 4 also advances linearly. At the time of FIG. 4, the pad 240 has not yet contacted the upper surface of the work 242. Subsequently, when the upper die 226 is further advanced, the first protrusion 24 of the press blade holding portion 244 is moved.
4a is in contact with a second protrusion 250c formed on the guide surface 250b of the guide table 250, and the second protrusion 250c
Go further to get on. As a result, the press blade holding portion 244 moves the work 24 by the tension spring 248.
2 is displaced toward the work 242 side against the urging force to the outside. Along with this, the press blade 234 held by the press blade holding section 244 is also displaced toward the work 242 side.

Subsequently, when the upper die 226 is further advanced, as shown in FIG. 5, the first protrusion 244a of the press blade holding portion 244 is brought into contact with the second protrusion 250c of the guide surface 250b.
, The tip of the first projection 244a contacts the tip of the second projection 250c. That is, the heights of both protrusions 244a and 250c match. As described above, the first protrusion 244a of the press blade holding portion 244 matches the height of the cutting edge of the press blade 234, and the second protrusion 2 of the guide surface 250b.
Reference numeral 50c is provided at a position substantially equal to the height of the upper surface of the flange 242b of the work 242. For this reason, when the heights of both projections 244a and 250c match, the cutting edge of press blade 234 is located at substantially the same height as the upper surface of flange 242b. 4 to 5, the pad 240 contacts the upper surface of the work 242, and the work 242 is fixed by the pressing force of the spring 239. Further, as shown in FIG.
The width E of d is, as described above, the width A of the press blade 234,
Since the width B of the press blade holding portion 244, the width C of the first protrusion 244a, and the width D of the second protrusion 250c are formed as a total distance, in this state, the press blade 234 The cutting edge will be located exactly at the base of the flange 242b. For this reason, when the upper die 226 is further advanced, the cutting edge of the press blade 234 enters the root of the flange 242b, and the flange 242b is removed from the root.

Subsequently, when the upper die 226 is further advanced, the first protrusion 244a of the press blade holding portion 244 is brought into contact with the second protrusion 250c of the guide surface 250b as shown in FIG.
Get over. The press blade holding portion 244 includes the tension spring 24.
8, the first protrusion 244a escapes in the direction outside the work 242 when it gets over the second protrusion 250c, and again along the flat surface of the guide surface 250b. Go straight ahead. Thus, the cutting edge of the press blade 244 is the flange 242b.
At the height of the flange 242b, it moves closer to the base of the work 242, and at other heights, escapes to the outside of the work 242 in a trajectory as shown by an arrow Y in FIG.

As described above, according to the apparatus of the second embodiment,
Since the flange 242b can be removed from its base, the remaining cutting does not occur, and the work 242 can be prevented from being cut off other than the flange 242b.

As described above, the flange removing apparatus according to the embodiment of the present invention has been described. However, the scope of the present invention is not limited to the above-described embodiment. That is, the present invention can be implemented in various modified and improved forms based on the knowledge of those skilled in the art. For example, in the apparatus of the first embodiment shown in FIGS. 1 to 3, by attaching the leaf spring 128 to the press blade 134 and the press blade holding portion 126 a, the press blade 134 moves along the flange forming surface 142 a. Although configured, the scope of the present invention is not limited to this. For example, the press blade holding portion 126a is
6 can be displaced in the outward direction of the workpiece 142 perpendicular to the line of advance and retreat, and a spring fixing portion is provided on the upper die 126, and an extruding spring is attached between the press blade holding portion 126a and the spring fixing portion. You may comprise so that it may move along the flange formation surface 142a. However, in this case, unlike the device of the second embodiment, the press blade holding portion 126a is configured to be urged inward of the work 142 by an extrusion spring. According to this configuration, the leaf spring 128
Since the press blade 134 can be more easily bent by using an extrusion spring instead of the
Even when the flange 142b is formed not at the end but at the intermediate portion, after the flange 142b is removed from the root, the press blade 134 is moved along the flange forming surface 142a without getting into the flange forming 142a. It is easy.

Further, for example, in the apparatus of the second embodiment, the case where the advancing and retreating direction of the press blade 234 is parallel to the flange forming surface 242a is described, but the advancing and retreating direction of the press blade 234 and the flange forming surface 242a are not parallel. The present invention can be applied to the case of parallel. The present invention can also be applied to a case where the flange forming surface 242a is not flat but curved. Further, in the apparatus of the second embodiment, the case where the flange 242b is formed in the middle of the flange forming surface 242a is described, but the position of the flange 242b formed on the flange forming surface 242a is not limited. Specifically, the shape and position of the press blade holding portion 244 (including the first protrusion 244a) and the guide portion 250a (including the second protrusion 250c)
By changing the shape and position of the press blade 234, the elastic force of the tension spring 248, the width of the positioning portion 250d, and the like, the inclination angle of the flange forming surface 242a with respect to the advance and retreat direction of the press blade 234 varies. Even if the curved shape of the flange forming surface 242a is various, the flange 2 formed on the flange forming surface 242a
Even if the position of 42b is various, the effect of the present invention can be obtained in that the remaining of cutting does not occur, and the portion other than the flange 242b of the work 242 can be prevented from being cut off.

[Brief description of the drawings]

FIG. 1 is a sectional view of a flange removing device according to a first embodiment (before removing a flange).

FIG. 2 is a sectional view of the same (just before the flange is removed).

FIG. 3 is a sectional view (after removing a flange).

FIG. 4 is a sectional view of a flange removing device according to a second embodiment (before removing the flange).

FIG. 5 is a sectional view of the same (just before the flange is removed).

FIG. 6 is a sectional view of the same (after removing the flange).

FIG. 7 is an enlarged view of the vicinity of a flange of the flange removing device of FIG. 5;

[Explanation of symbols]

122, 222: base 124, 224: guide post 126, 226: upper die (an example of a press die) 126a: press blade holding portion 128: leaf spring 130: bolt hole 132: deflection adjusting bolt 134, 234: press blade 136, 236: Lower mold 137, 237: Pad support 138, 238: Guide 139: 239: Spring 140, 240: Pad 142, 242: Work (extruded material) 142a, 242a: Flange forming surface 142b, 242b: Flange 226a: Spring Fixed portion 244: Press blade holding portion, 244a: First protrusion 246: Pin 248: Tension spring 250: Guide 250a: Guide portion, 250b: Guide surface, 250c:
2nd projection part, 250d: positioning part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshiyuki Takasago 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (72) Inventor Masaaki Ando 5-28-10 Hosoyacho, Toyota City, Aichi Prefecture Fuji Corporation In the world (72) Inventor Takeshi Tanoue 5-28-10 Hosoya-cho, Toyota-shi, Aichi F-term in Fuji World Co., Ltd. 3C039 DA12

Claims (3)

[Claims] 1. An apparatus for removing a flange formed on a flange forming surface which spreads outside of a work beyond an advancing / retracting line of a press blade on a forward side of a retreating side of a press die which reciprocates, comprising: a reciprocating press die; A flange removing device comprising: a press blade mounted on a press die so as to be displaceable in a direction outward of a work perpendicular to a line of advance and retreat of the press die; and a biasing means for biasing the press blade inward of the work. 2. A method for removing a flange formed on a flange forming surface which extends to the outside of a work beyond an advancing / retracting line of a press blade on a forward side of a retreat side of a press die which advances and retreats, wherein the press blade is disposed on a side of the flange. A method in which the flange is removed by positioning the press blade at the base of the flange by bringing the press blade forward along the flange-formed surface after contacting the flange-formed surface of the work on the retreat side. 3. An apparatus for removing a flange formed on a flange forming surface of a work, comprising: a press die which moves forward and backward; and a press blade which is attached to the press die so as to be displaceable in a direction orthogonal to the advance / retreat line of the press die. A biasing means for biasing the press blade in the outward direction of the work, a guide portion for moving the press blade toward the work at the height of the flange, and a positioning portion for positioning the flange forming surface at a predetermined distance from the guide portion. Flange removing device.