JP2529818B2 - Work coupling device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work joining apparatus having a simple structure capable of firmly joining a plurality of superposed plate-like portions by press molding.

[0002]

2. Description of the Related Art For example, as shown in FIG. 12, a framework of various panel bodies used in a prefabricated construction is often formed from a work w ... Such joining of the workpieces w, w is performed by rivet, welding, or a type of press molding generally called "caulking".

[0003] As a device for joining the "caulking" type work, a device described in Japanese Patent Application Laid-Open No. Sho 62-77130 (hereinafter referred to as Conventional Example 1), Japanese Patent Publication No. 60-18259, and so on.
And the apparatus described in Japanese Patent Publication No. 61-53133 (hereinafter referred to as Conventional Example 3).

In the conventional example 1, as shown in FIG. 13, a die a provided with a deep drawing opening a3 having a bottomed and cylindrical side wall.
2 and a punch-shaped deep drawing portion a7 of a molding ram, and the thin plates w1 and w1 stacked and mounted on the die a2 are deep drawn and compressed in the deep drawing opening a3 by the deep drawing portion a7. This is an apparatus for joining the thin plates w1 and w1.

Further, in the conventional example 2, as shown in FIG. 14, a punch b1 and a recessed groove for extruding and joining two metal thin plates w2, w2 by the punch b1 are formed and the metal is joined. It comprises movable die parts b2, b2 which are rotated to return to the original state when the thin plates w2, w2 are removed. Note that the anvil b3 forming the bottom surface of the concave groove is kept stationary.

As shown in FIG. 15, the conventional example 3 includes a punch c1 and a die c3 composed of movable partition walls c2, and punches plate materials w3 and w3 placed on the die c3. The shaft rod c4 is pushed up by a compression spring while being joined by press-fitting c1 in the direction of the shaft rod c4, whereby each partition wall portion c2 ... Of the die c3 is expanded in the direction shown by the arrow in the drawing, and the plate material w3, It is a device to get out w3.

[0007]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
Since the volume of the deep drawing opening a3 is invariable, there is no escape for the material forming the thin plate w1 in the final pressing step, and a large pressing force is required for its compressive deformation, and the die a2 is extremely large. There is a problem that an eccentric load is applied, and when an oil escape hole is provided in the die a2, the die a
2 may be insufficient in rigidity and may not be able to reliably receive a large uneven load.

In the prior art 2, since the volume of the groove changes in the pressing step, an excessive increase in the pressing force can be avoided. However, since the dies b2 are of a movable type, the structure becomes complicated, and the cost is reduced. As well as
There is a concern that durability may decrease.

The third conventional example also has the same problems as the second conventional example because the dice c3 including the movable partition walls c2... Is used.

The present invention is based on the fact that an elastic material made of rubber is arranged on the peripheral wall side of the die hole, the volume of the die hole can be changed, the pressing force can be reduced, and the structure is simplified. The purpose of the present invention is to provide a work joining device that can reduce costs and maintain durability.

[0011]

In order to achieve the above object, a work joining apparatus according to the present invention is configured such that a plate-like portion having a plurality of works stacked thereon is pushed by a punch into a die hole opened on the upper surface of the die. In the plate-shaped part, a drawing part that is recessed in the die hole at a right angle to the plate surface is formed, and the punch side presses the bottom part of the drawing part between the punch part and the bottom surface of the die hole. And a die body provided with the die hole having a peripheral wall which is open at the upper surface and extends downward from the opening, and a die which is a bottom surface of the die hole and is integral with or separate from the die body. While having a bottom portion, the die hole has a large-diameter portion continuous with a large diameter larger than the opening of the die hole on the upper surface, so that the large-diameter portion and a small diameter near the opening on the upper surface. Along with the form a stepped shape consisting of a,
An elastic material made of rubber is arranged on the peripheral wall side of the die hole.

[0012]

[Function] The stacked plate-like parts of a plurality of works are pushed into the die hole of the die by a punch, and a drawing part is formed in the plate-like part at a right angle to the plate surface by the die hole. The bottom portion of the die is further pinched between the bottom surface of the die hole and the workpieces by expanding the diameter of the work on the punch side, and the die has a peripheral wall that opens on the upper surface and extends downward from the opening. A die main body provided with a hole, and a bottom of the die hole and consisting of a die bottom part which is integral with or separate from the die main body, and further, the die hole is formed from a large diameter part below and a small diameter part near the opening on the upper surface. Then, an elastic material is arranged on the peripheral wall side of the die hole. Therefore, after forming the throttle portion, when the punch presses the bottom portion of the throttle portion with the bottom surface of the die hole,
The pressing force of the punch that pushes the plate-shaped portion on the punch side to the side sufficiently while suppressing the push-out of the lower plate-shaped portion toward the peripheral wall by the elastic material is applied to the die by pushing the elastic material. It can be reduced by the volume change of the hole, and the load in each process of deep drawing (formation of drawing part), diameter expansion of the work on the punch side, and rolling is separately handled by the die body and the die bottom part, respectively. Compared to the die hole volume invariant type, structural unbalanced load can be reduced, and the die can be made compact.

Compared with the conventional movable die whose diameter is further expanded, the construction can be simplified and the durability can be improved, and the die can be constructed with a simple shape, so that the cost can be reduced.

In order to reduce the pressing force applied to the entire die, lubricating oil can be used in forming the throttle portion. An oil escape hole is provided at the bottom of the die to prevent this lubricating oil from being stored in the die hole. When the die bottom is formed as a separate body, oil can be released by forming a groove on the outer peripheral wall of the die.

Further, since the die hole has a stepped shape having a small diameter portion near the opening on the upper surface, it is possible to increase the diameter of the plate-like portion on the punch side and the extension thereof toward the peripheral wall of the die hole, thereby increasing the bonding strength. In addition, since the elastic member can suppress the lower plate-shaped portion from protruding, the coupled plate-shaped portions can be easily taken out from the die hole.

As described above, according to the first aspect of the invention, by simplifying the structure and reducing the pressing force, the durability is improved without lowering the bonding strength, the cost is reduced and the load applied to the die is reduced. It is possible to achieve both.

As the elastic material, urethane rubber can be preferably used in consideration of oil resistance, crack resistance, fatigue resistance, wear resistance, and the like, as well as natural rubber, NBR, SBR,
BR, CR, acrylic rubber or the like, or a mixture or laminate thereof may be adopted, and a metal or non-metal spring or the like that expands and contracts in the radial direction such as a spiral spring and a cylindrical spring may also be used.

Further, in the invention of claim 2, when a notch-shaped recess is provided along the peripheral wall at the bottom of the die and the elastic member is provided at the recess, the punch punches the bottom of the narrowed portion into a die hole. When the work material on the punch side is squeezed into the recess when it is pressed against the bottom surface, the bonding strength can be further enhanced, and the squeeze pressure can be optimized by the elastic material.

Further, in the invention of claim 3, when the elastic material is arranged at the intersection of the small diameter portion and the large diameter portion, the punch-side plate-like portion can be sufficiently pushed out toward the elastic material. It is possible to obtain a reliable bond.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 3, the workpiece joining apparatus 1 of the present invention is
It comprises a cylindrical punch 2 and a die 3 provided with a die hole 4 opening on the upper surface.

Further, in the present embodiment, the work W is formed from a channel steel having flanges W2 and W3 protruding from the upper and lower edges of the web W1 in the present embodiment, and at the ends of the works W and W, as shown in FIG. Upper and lower flanges W2, W2, W
3, the work connecting device 1 of the present invention is used to connect the two plate-like portions A, A, B, B formed by W3 to each other.

In this embodiment, as shown in FIG. 10, the work joining apparatus 1 has a lower support stand 21 having an upper surface standing upright from one end of the base 20, and a lower surface facing the lower support stand 21. Main body 22 rising from the other end of the base 20
The punches 2 and 2 are arranged concentrically with the lower surface of an upper support stand 24 which is mounted via a cylinder 23 which is perpendicular to the main body 22, and a vertically movable base 25 which is vertically movably mounted on the side surface of the main body 22. , 26 are fixed to dies 3, 3, respectively, on the surfaces facing the punches 2, 2.

Therefore, as shown in FIG. 10 and FIG. 11, the ends of the two works W, at which the W is at a right angle, are moved to the upper and lower moving bases 2.
5 and 26 are arranged in a V shape, and the cylinder 23
Is operated to lower the upper support base 24,
The pair of upper and lower plate-shaped portions A, B, A and B can be combined at once.

The upper and lower moving tables 25, 26 can move up and down by advancing and retracting the taper portion 27 of the advancing / retreating tool having a taper portion 27 at the tip end according to the height of the web W1, and the work W, W is lowered so that the lower punch 2 is pressed by pressing the lower plate-shaped portions A and B by lowering the upper punch 2 by the operation of the cylinder 23.

The work joining device 1 may be provided with one punch 2 and a die 3. For example, as shown in FIG. 12, a plate-shaped work is formed on a plate-shaped portion A formed by a web W1 of a work W. Can be used to join the plate-shaped portions B of the.

As shown in FIG. 1, the die 3 has a die body 6 provided with a die hole 4 having a peripheral wall 5 which is open on the upper surface and extends downward from the opening, and a bottom surface 4 of the die hole 4.
And a cylindrical die bottom 9 forming A. The die bottom 9 is formed by using a packing 32.
It is attached to and prevents the die 3 from falling off when handling it alone. The die bottom portion 9 may be formed integrally with the die body 6.

Further, the die hole 4 has a large diameter portion 10 which has a large diameter and is continuous with the diameter of the die hole 6 on the upper surface of the die body 6 and which is continuous with the large diameter portion 10.
And the upper surface of the die body 6 and a small-diameter portion 11 formed by an overhanging portion 34 having a substantially trapezoidal or triangular shape in cross section and jutting out with the upper surface aligned and near the opening on the upper surface, which in this embodiment has a small diameter at the opening. Make a step.

Further, at the intersection of the small-diameter portion 11 and the large-diameter portion 10, in this embodiment, the bottom surface 4A of the die hole 4, that is, the upper surface of the die bottom portion 9 is opened so that the lower end is wide. An elastic member 7 made of rubber and having a slope 37 that protrudes and extends is disposed on the peripheral wall 5 side of the die hole 4.

A plurality of workpieces W, W, and two plate-shaped portions A and B in this embodiment are placed on the upper surface of the die body 6 as shown in FIG. As shown in FIG. 2, A and B are pushed into the die hole 4 by the punch 2, and the plate-shaped portions A and B are formed with narrowed portions 12 and 12 which are recessed in the die hole 4 at right angles to the plate surface. .

Further, the punch 2 clamps the upward-facing bottom portion 12A of the narrowed portion 12 on the punch 2 side with the bottom surface 4A of the die hole 4, that is, the upper surface of the die bottom portion 9, thereby making it possible to realize the structure shown in FIG. As shown in FIG. 3, the elastic member 7 expands the plate-shaped part A of the work W on the punch 2 side while suppressing the expansion and expansion of the lower plate-shaped part B to form the bulging part 17. As a result, the plate-shaped portions A and B are firmly bonded.

At this time, the inclined surface 37 of the elastic member 7 is pressed toward the peripheral wall 5 to increase the volume of the die hole 4, but the diameter of the lower plate-shaped portion B is increased inside the overhanging portion 34. Workpiece W, which is fastened and joined by elastic material 7,
Allows removal from the W die hole 4.

Thus, when the punch 2 descends, the die hole 4
Since the volume changes (increase), the pressing force can be reduced and the structural unbalanced load can be significantly reduced compared to the die hole volume invariant type, while the die body 6 is immovable, so the configuration is simplified. Therefore, the durability can be improved and the cost can be reduced.

4 and 5 show another embodiment of the present invention. In this example, a notch-shaped recess 13 is provided along the peripheral wall 5 of the die hole 4 at the peripheral edge of the upper surface of the die bottom 9, and an elastic material 7 made of rubber is arranged on the peripheral wall 5 side of the die hole 4. Is provided in the recess 13.

Therefore, the punch 2 is the bottom portion 12A of the throttle portion 12.
5 is pressed against the bottom surface 4A of the die hole 4, as shown in FIG. 5, the lower surface peripheral portion of the lower plate-shaped portion B is slightly rolled outward and downward, so that the plate on the punch 2 side is rolled. The bulging portion 17 can be formed by sufficiently expanding the diameter of the shaped portion A, and the bonding strength can be increased.

As shown in FIGS. 6 and 7, an elastic member 7 disposed on the peripheral wall 5 side of the die hole 4 is provided at the intersection of the small-diameter portion 11 and the large-diameter portion 10 and the concave portion provided on the die bottom portion 9. Thirteen
You may stick to.

In this case, the elastic material 7 having a relatively large cross-sectional area can be securely attached to the die 3, and the durability can be improved, and the expanded width of the plate-shaped portion A on the punch 2 side,
That is, the overhanging length of the bulging portion 17 can be increased, and a strong connection can be obtained.

8 and 9 show another embodiment of the present invention.
In this example, the die hole 4 provided in the die body 6 is
It is composed of a small diameter portion 11 formed by an overhanging portion 34 having a rectangular cross section and protruding at an opening on the upper surface, and a large diameter portion 10 below the small diameter portion 11. An elastic material 7 made of rubber and extending on the upper surface of the bottom portion 9 is arranged on the peripheral wall 5 side of the die hole 4.

The plate-shaped portion A on the punch 2 side is guided to the die bottom portion 9 by the reaction force received by the die body 6 by the pressurization of the punch 2 via the plate-shaped portions A and B which are overlapped with each other, and is made of an elastic material. By compressing and deforming 7, the diameter of the die hole 4 is changed and the diameter of the die hole 4 is increased.

[0039]

As described above, the work joining apparatus according to the present invention pushes a plate-like portion on which a plurality of works are stacked into a die hole of a die with a punch, and inserts the die into the plate-like portion at right angles to the plate surface. After forming a squeezed portion recessed by the hole, the punch further presses the bottom of the squeezed portion with the bottom surface of the die hole,
A die main body provided with the die hole having a peripheral wall that opens at the upper surface and extends downward from the opening, while joining the works by expanding the diameter of the work on the punch side, and a die that forms the bottom surface of the die hole. Consists of the bottom and
Moreover, the die hole has a stepped shape including a large diameter portion on the lower side and a small diameter portion near the opening on the upper surface, and an elastic material is arranged on the peripheral wall side of the die hole. Therefore, after forming the throttle portion, when the punch presses the bottom portion of the throttle portion with the bottom surface of the die hole, the elastic material is used to push the lower plate-shaped portion toward the peripheral wall. The pressing force of the punch, which suppresses the plate portion on the punch side to the side sufficiently, can be reduced by the volume change of the die hole due to the pushing of the elastic material, and deep drawing (formation of the drawing portion) Expanding the work on the punch side, the load in each process such as rolling is separately handled by the die body and the die bottom part, so it is possible to reduce the structural unbalanced load compared to the die hole volume invariant type, The dies can be made compact.

Compared with the conventional movable die whose diameter is further expanded, the construction can be simplified and the durability can be improved, and the die can be constructed with a simple shape, so that the cost can be reduced.

Lubricating oil can be used for forming the throttle portion in order to reduce the pressing force applied to the die as a whole. To prevent the lubricating oil from being stored in the die hole, an oil escape hole is provided at the bottom of the die. If the die bottom is formed as a separate body, a groove may be formed in the outer peripheral wall thereof.

Further, since the die hole has a stepped shape having a small diameter portion near the opening on the upper surface, it is possible to increase the diameter of the plate-like portion on the punch side and the extension thereof toward the peripheral wall of the die hole, thereby increasing the bonding strength. In addition, since the elastic member can suppress the lower plate-shaped portion from protruding, the coupled plate-shaped portions can be easily taken out from the die hole.

As described above, according to the first aspect of the present invention, by simplifying the structure and reducing the pressing force, the durability is improved without lowering the bonding strength, the cost is reduced and the load on the die is reduced. It is possible to achieve both.

The bottom of the die may be formed integrally with the die body, or may be a separate body.

In the invention of claim 2, when a notch-shaped recess is provided in the bottom of the die along the peripheral wall, and the elastic member is provided in the recess, the punch punches the bottom of the throttle into a die hole. When the work material on the punch side is squeezed into the recess when it is pressed against the bottom surface, the bonding strength can be further enhanced, and the squeeze pressure can be optimized by the elastic material.

Further, in the invention of claim 3, when the elastic material is arranged at the intersection of the small diameter portion and the large diameter portion, the punch-side plate-like portion can be sufficiently pushed out toward the elastic material. It is possible to obtain a reliable bond.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a throttle section is formed.

FIG. 3 is a cross-sectional view showing a diameter expansion of a punch-side work.

FIG. 4 is a sectional view showing another embodiment of the present invention.

FIG. 5 is a sectional view showing the operation.

FIG. 6 is a sectional view showing another embodiment of the present invention.

FIG. 7 is a sectional view showing the operation.

FIG. 8 is a sectional view showing another embodiment of the present invention.

FIG. 9 is a cross-sectional view showing its action.

FIG. 10 is a side view illustrating an example of a work joining device.

FIG. 11 is a partial plan view showing an arrangement state of works.

FIG. 12 is a partial perspective view illustrating a work.

FIG. 13 is a sectional view for explaining a conventional technique.

FIG. 14 is a sectional view for explaining a conventional technique.

FIG. 15 is a cross-sectional view for explaining a conventional technique.

[Explanation of symbols]

 2 Punch 3 Die 4 Die hole 5 Circumferential wall 6 Die body 7 Elastic material 9 Die bottom 10 Large diameter part 11 Small diameter part 12 Drawing part 13 Recess A, B Plate part W Work

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 62-148033 (JP, A) JP 62-148037 (JP, A) JP 62-72441 (JP, A) JP 62- 244533 (JP, A) Actual flat 4-54529 (JP, U) Actual flat 3-36396 (JP, U)

Claims (3)

(57) [Claims] 1. A plate-shaped portion on which a plurality of works are stacked is pushed by a punch into a die hole opened on the upper surface of the die, and a narrowed portion is formed in the plate-shaped portion at a right angle to the plate surface. The punch connects the work by expanding the diameter of the work on the punch side by pinching the bottom of the narrowed portion with the bottom surface of the die hole, and the die is a peripheral wall that opens at the upper surface and extends downward from the opening. With a die body provided with the die hole having, and a bottom of the die hole and consisting of a die bottom part that is integral with or separate from the die body, and the die hole is an opening of this die hole on the upper surface. By having a large diameter portion that is continuous with a larger diameter than the above, a large diameter portion and a small diameter portion near the opening on the upper surface form a stepped shape, and an elastic material is provided on the peripheral wall side of the die hole. Distribute Consisting of Te work of the coupling device. 2. The workpiece joining apparatus according to claim 1, wherein the die bottom portion is provided with a notched recess along the peripheral wall, and the elastic material is provided in the recess. 3. The work joining apparatus according to claim 1, wherein the elastic material is arranged at an intersection of a small diameter portion and a large diameter portion.