JP2843659B2 - Method and apparatus for projecting a burr into a prepared hole of a thin member - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin member for facilitating connection of a branch pipe or the like to a thin member such as a flat plate or a pipe provided thinly with a metal such as iron, copper, or aluminum. The present invention relates to a method and an apparatus for projecting a burr into a prepared hole of a fin.

2. Description of the Related Art Conventionally, in order to easily connect a branch pipe to a thin member such as a flat plate or a pipe thinly provided with a metal such as iron, copper, or aluminum, a branch pipe is formed on a surface of a processing target portion of the thin member. There is known an opening which can be inserted and a burr provided on the outer periphery of the opening. In order to connect the branch pipe to the thin member, after inserting the branch pipe into the opening, the branch pipe and the burr are fixed by brazing, welding or the like.

As a method of forming burrs on this thin member, a method using a conventional press is generally used. According to this method, a pilot hole is previously provided in a processing target portion of a thin member, and the outer periphery of the pilot hole is directly pressed by a press or the like to project a burr. In another method, after directly deep-drawing the processing target part with a press,
Burrs are formed by punching the deep drawing portion.

However, in the conventional method described above, when the thin member is formed in a pipe shape, it is very difficult to press the outer periphery of the pilot hole from the inside of the annular thin member with a press or the like, and the flat thin member is used. Even if burrs could be formed, burrs could not be formed outward on a pipe-shaped thin member using a press.

As a method of forming burrs on the thin pipe-like member as described above, there is also a method using an insertion pin, but this method has a low processing speed and cannot form burrs quickly, so that productivity is low. It had the drawback of getting worse.

In addition to the above, there is a method of using a hydraulic bulge, an electromagnetic bulge, or the like as a method of forming burrs on a pipe-shaped thin member. However, in these methods, since a processing target portion is strongly pressed without previously preparing a prepared hole in a thin-walled member, an extra distortion is generated on the outer periphery of the processing target portion, and the processing speed is reduced to complicate the processing. Since such a process involves complicated processing, the productivity is poor and the apparatus is disadvantageously large.

Problems to be Solved by the Invention The present invention is to solve the problems as described above, iron, copper, when forming a burr on a thin member provided with a thin metal such as aluminum, flat plate-shaped For thin-walled members as well as small-diameter pipe-shaped thin-walled members, the thin-walled members can be deburred outward with a simple device and this burr-forming operation can be performed accurately and quickly. hand,
The goal is to improve productivity.

Means for Solving the Problems In order to solve the problems as described above, the present invention forms a pilot hole in a processing target portion of a thin member, and on the back side of the pilot hole, an elastic member which is elastically deformed by pressing is provided. In this method, the elastic member is deformed by applying an external force to the elastic member, and the deforming force is applied to the outer periphery of the pilot hole.

Further, the deformation force to the outer periphery of the pilot hole may be obtained by directly applying the elastic deformation portion of the elastic member to the outer periphery of the pilot hole.

Further, the deformation force to the outer periphery of the prepared hole may be obtained by being applied to the outer periphery of the prepared hole via a processing member which is pressed by the elastically deformable portion of the elastic member and moves in the prepared hole direction.

An apparatus that embodies the above method is a thin member that penetrates a pilot hole in a processing target portion, and is located on the back side of the thin member, an elastic member is fitted and mounted on the surface, and the elastic member is attached to a lower side than the pilot hole. The inner mold that faces the pilot hole so that it can be elastically deformed by external force while having a large diameter, and the bending straightening hole that is located on the surface side of the pilot hole and provided on the thin-walled member side is smaller than the pilot hole. It comprises an outer mold having a large diameter and an external pressure rod for applying an external force to the elastic member to elastically deform the elastic member.

Further, the elastic member may be provided with an elastically deformable portion on the outer periphery of the pilot hole so as to be pressurizable.

Further, a processing member movable in the direction of the pilot hole may be interposed in the space between the elastic member and the pilot hole, and this processing member may be positioned so as to be pressurizable on the outer periphery of the pilot hole by the deformation force of the elastic member. .

 Further, the elastic member may be formed of a rubber material.

Further, the elastic member may be formed of a rubber material in which silicone oil or silicone gel is sealed.

The present invention is constructed as described above.
In order to form burrs on a thin member made of metal such as copper or aluminum, the thin member may be either a flat plate or a pipe. And the like. After this pilot hole is formed, an elastic member that is elastically deformed by pressure is located on the back side of the pilot hole, and an external force is applied to this elastic member by an external pressure rod pressed by a press or the like to deform the elastic member. The deformation force of this elastic member is applied to the outer periphery of the pilot hole. A pressing force or the like can be applied to the elastic member positioned on the back side of the pilot hole by using an external pressure rod such as a rod corresponding to the shape of the thin member. Of course, even in the case of small-diameter pipe-shaped thin members, it is possible to apply a deforming force from the inside of the thin member to the outer periphery of the pilot hole, project the pilot hole toward the surface, and form burrs outward. And this burr,
It can be formed accurately and quickly to improve productivity.

Further, if the deformation force to the outer periphery of the pilot hole is obtained by directly pressing the elastic deformation portion of the elastic member against the outer periphery of the pilot hole, the burr can be removed with a simple mechanism.

Also, if the deforming force to the outer periphery of the prepared hole is pressed by the elastically deforming portion of the elastic member and applied to the outer periphery of the prepared hole via the processing member moving in the prepared hole direction, accurate dimensions and shapes can be obtained. Deburring can be easily performed and the elastic member is not directly pressed, so that the elastic member does not wear,
Deburring work by long-term use becomes possible.

Further, if the elastic member is formed of a rubber material, the processing of the elastic member becomes easy, and the elastic member can be formed in a shape corresponding to any use.

Further, if the elastic member is formed of a rubber material in which silicone oil or silicone gel is sealed, the elastic member which receives an external force can easily and favorably be deformed, and a more reliable burr can be formed.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
(1) is a thin member, which is provided in a thin plate or thin pipe shape made of a metal such as iron, copper, aluminum or the like, and is prepared by a press, a drill, or the like at a processing target portion for connecting a branch pipe or the like. 2)
Is formed in advance. On the back side of the thin member (1), an inner die (3) made of steel is located as shown in FIG. As shown in FIG. 1, the inner mold (3) has a mounting recess (4) provided on the surface side thereof, and the mounting recess (4) is made of urethane, nitrile, neoprene or the like which is easily elastically deformed by pressurization. An elastic member (5) made of a gum material is fitted and mounted on the surface. As shown in FIG. 2, a pilot hole (2) is formed so as to be larger in diameter than the pilot hole (2) of the outer diameter of the elastic member (5) so that the elastic member (5) can be elastically deformed by an external force. Elastic member (5)
Is provided on the outer periphery of the pilot hole (2) so as to be pressurizable. The elastic member (5) is formed in a columnar shape as shown in FIG.

An outer mold (7) is located on the surface side of the pilot hole (2) facing the elastic member (5) as shown in FIG. 2, and the thin member (1) of the outer mold (7) is located. A bent straightening opening (8) larger than the inner diameter of the pilot hole (2) is formed on the side. An external pressure rod (10) connected to a pressing device such as a press is positioned inside the bending straightening opening (8) so as to be able to advance and retreat as shown in FIG. Is applied to the surface side of the elastic member (5) to enable elastic deformation of the elastic member (5).

In the above embodiment, the elastic member (5) is formed in a cylindrical shape. However, in another different embodiment, the elastic member (5) is
It may be formed in a conical shape as shown in the figure, may be formed in a semi-elliptical shape as shown in FIG. 13, or may be formed in a ring-shaped elastic body (11) as shown in FIG. Alternatively, it may be formed by inserting a columnar elastic body (12) provided in a columnar shape.

In the structure constructed as described above, a thin member (1) provided thinly with a metal such as iron, copper, aluminum, etc.
In order to form 3), the thin member (1) may be either a flat plate or a pipe, but a pilot hole (2) is formed through a target portion of the thin member (1) by pressing, drilling or the like. I do.

After the formation of the pilot hole (2), the inner mold (3) is located on the back side of the thin member (1) as shown in FIG. 2, and the elastic member (5) of the inner mold (3) is removed. , On the back side of the pilot hole (2). An outer mold (7) is located on the surface side of the thin member (1), and a bending straightening opening (8) provided in the outer mold (7) is connected to the front side of the pilot hole (2). Locate on the outer circumference. Then, an external force is applied to the elastic member (5) having the inner mold (3) and the outer mold (7) positioned on both sides by operating the outer pressure rod (10) connected to a press or the like. The elastic member (5) subjected to the external force undergoes elastic deformation in the direction of the thin member (1) as shown in FIG. 3, and the elastic hole (6) of the elastic member (5) causes the pilot hole (2). Directly press the outer circumference of
This pilot hole (2) is deformed and projected in the surface direction. Also, when the pilot hole (2) is deformed and protruded, a bending straightening opening (8) having a diameter larger than the inner diameter of the pilot hole (2) is located on the surface side of the pilot hole (2). The thin member (1) is bent through a contact portion (15) with the outer peripheral edge of the bending straightening opening (8), and a burr is formed on the processing target portion of the thin member (1) as shown in FIG. (1
3) can be formed to project outward.

In the above embodiment, the deformation force to the outer periphery of the pilot hole (2) is obtained by directly applying the elastic deformation portion (6) of the elastic member (5) to the outer periphery of the pilot hole (2). In another embodiment, as shown in FIGS. 5 to 7, a deforming force applied to the outer periphery of the pilot hole (2) is pressed by an elastic deformation portion (6) of the elastic member (5). It is to be added to the outer periphery of the prepared hole (2) via the processing member (16) moving in the prepared hole (2) direction. In this case, it is possible to easily carry out the burr (13) with the correct size and shape, and the elastic member (5)
As a result, since the thin member (1) is not directly pressed, the elastic member (5) does not wear, and the operation of removing the burrs (13) becomes possible after long-term use.

In the above embodiment, the external pressure rod (10) is located inside the bending correction opening (8) so as to be able to advance and retreat, and the elastic member (5) is elastically deformable. As shown in FIGS. 8 to 10, an insertion hole (17) for inserting the external pressure rod (10) into the inner mold (3) in a direction intersecting the axial direction of the pilot hole (2) so as to be able to advance and retreat. ) May be formed. When an external force is applied to the side surface of the elastic member (5) by the external pressure rod (10) to make the elastic member (5) elastically deformable, the inner diameter of the pilot hole (2) is small, and the external pressure rod (10) is inserted. Even when this is not possible, many types of external pressure rods (10) can be used regardless of the size of the pilot hole (2), and the burrs (13) can be formed in various sizes.

In the above embodiment, the elastic member (5) is made of urethane,
Although formed of rubber material such as nitrile or neoprene, in another different embodiment, the elastic member (5) is filled with a filler (18) such as silicone oil or silicone gel as shown in FIG. It is formed of a rubber material. In this case, the deformation of the elastic member (5) subjected to the external force is easy and favorable, and more reliable formation of the burr (13) becomes possible.

Effect of the Invention Since the present invention is configured as described above, iron,
When forming a burr on a thin member provided thinly with a metal such as copper or aluminum, the elastic member positioned on the back side of the prepared hole is deformed by applying a pressing force by an external pressure rod operated by a press or the like, Since this deformation force is applied to the outer periphery of the pilot hole to form burrs, outward burrs are formed by a small and simple device using not only flat thin members but also small diameter pipe thin members. The burr can be formed accurately and quickly, and the productivity can be improved.

Further, if the outer periphery of the prepared hole is pressed through a pressing member, it is possible to easily perform burr removal with an accurate size and shape. Also, since there is no direct pressure with the elastic member,
The elastic member does not wear, and the deburring operation can be performed by using it for a long time.

[Brief description of the drawings]

1 shows an embodiment of the present invention, FIG. 1 is an exploded perspective view, FIG. 2 is a cross-sectional view showing an external pressure rod facing an elastic member, and FIG. 3 is an elastic member and a thin member. FIG. 4 is a cross-sectional view of a thin member provided with burrs, and FIG. 5 is a sectional view showing a state in which an external pressure rod faces a surface of an elastic member by providing a pressing member. FIG. 6 is a cross-sectional view showing an example, FIG. 6 is a cross-sectional view showing a different embodiment in which the surface of a thin member is pressed by an elastic member via a pressing member, and FIG. FIG. 8 is a cross-sectional view showing an embodiment, FIG. 8 is a cross-sectional view showing another different embodiment in which a pressing member is provided and an external pressure rod faces a side surface of an elastic member, and FIG. FIG. 10 is a cross-sectional view showing another different embodiment in a state where the side surface of the thin member is pressed by an elastic member. FIG. 11 is a cross-sectional view of an elastic member, FIG. 12 to FIG. 14 are cross-sectional views showing examples of different shapes of the elastic member, and FIG. It is sectional drawing which shows a different Example. (1) ... thin member, (2) ... pilot hole (3) ... inner mold, (5) ... elastic member (6) ... elastic deformation part, (7) ... outer mold (8) )… Bending straightening opening, (10)… External pressure rod (16) …… Worked member

Claims (10)

(57) [Claims] A thin hole is formed through a processing target portion of a thin-walled member, and an elastic member which is elastically deformed by pressurization is located on the back surface side of the prepared hole. The elastic member is deformed by applying an external force to the elastic member. A method of projecting a burr into a prepared hole of a thin member, characterized in that the deformed force is applied to the outer periphery of the prepared hole so that the prepared hole is deformed and projected in the surface direction by the deforming force. 2. The thin member according to claim 1, wherein the deforming force to the outer periphery of the pilot hole is obtained by directly applying an elastic deformation portion of the elastic member to the outer periphery of the pilot hole. A method of projecting burrs into holes. 3. The deforming force to the outer periphery of the prepared hole is obtained by applying to the outer periphery of the prepared hole through a processing member which is pressed by an elastic deformation portion of an elastic member and moves in the prepared hole direction. The method according to claim 1, wherein a burr is protruded from a prepared hole of the thin member. 4. The method according to claim 1, wherein the elastic member is formed of a rubber material. 5. The method according to claim 1, wherein the elastic member is formed of a rubber material containing silicone oil or silicone gel. 6. A thin member penetrating a pilot hole into a processing target portion,
An inner metal member located on the back side of the thin member, fitted with an elastic member on the front surface, and having a diameter larger than that of the prepared hole and facing the prepared hole so as to be elastically deformable by an external force. A mold, an outer mold having a bending straightening hole located on the surface side of the prepared hole and provided on the thin member side larger in diameter than the prepared hole, and an external pressure rod for applying an external force to the elastic member to elastically deform the elastic member An apparatus for projecting burrs into a prepared hole of a thin member, characterized by comprising: 7. The apparatus according to claim 6, wherein the elastic member has an elastically deformable portion provided on the outer periphery of the pilot hole so as to be pressurizable. 8. A space between the elastic member and the pilot hole is provided with a processing member movable in the direction of the pilot hole, and the processing member is positioned so as to be able to press against the outer periphery of the pilot hole by the deformation force of the elastic member. 7. An apparatus for projecting burrs into a prepared hole of a thin member according to claim 6, wherein: 9. The apparatus according to claim 6, wherein the elastic member is formed of a rubber material. 10. The apparatus according to claim 6, wherein the elastic member is formed of a rubber material in which silicone oil or silicone gel is sealed.