JP2794174B2 - Burring caulking 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 burring crimping device for folding and crimping a burring hole formed in a plurality of plates in a stacked state.

[0002]

2. Description of the Related Art Conventionally, there is a burring caulking device as a device for joining relatively thin plate materials in a laminated state. This burring caulking device pierces burring holes in a plurality of plate materials in a stacked state, performs burring processing to form a burring portion on the periphery of the burring hole, and returns and crimps the burring portion formed by this burring processing. In this way, the plate members are joined. As shown in FIG. 10, the burring caulking device 50 includes a die 51 in which a pair of expandable members 51a, 51a are formed by dividing and forming a burring hole 51b, and a punch guide 52 capable of holding a plate P together with the die 51. And a punch 53 provided so as to be guided up and down by the punch guide 52 by the operation of a first lifting drive source (not shown) and to enter the burring hole 51 b of the die 51. An anvil 54 is located vertically downward and can move up and down in conjunction with the punch 53. The die 51 is configured to move up and down in response to the operation of a second lifting drive source (not shown).

In this burring crimping device 50, first, a plate material P placed on a die 51 is sandwiched by a punch guide 52, and then the punch 53 is lowered to perform burring, and a burring hole is formed in the plate material P. With
A cylindrical burring portion is formed around the burring hole. After the completion of the burring process, as the punch 53 moves up, the anvil 54 rises by breaking the die 51, and the burring portion is turned back to perform crimping,
The plate material P is joined.

[0004]

However, in the above-mentioned conventional burring crimping apparatus, in order to perform burring and crimping, the die is configured in a divided manner, and the anvil is raised by breaking the die. Has become. For this reason, the die expands due to the pressing force at the time of performing the burring process, which causes a problem that the burring process cannot be performed well.In addition, at the time of joining the plate materials, the interval between both the punch and the anvil, Or first, second
Each reciprocating drive source must be adjusted, which causes problems such as an extremely complicated and difficult adjustment operation.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a burring process in which burring holes are formed in a plurality of laminated plate members to form a burring portion on the periphery thereof. In addition, the plate material is joined by caulking the burring portion at the peripheral edge of the burring hole, and a slider that can reciprocate by receiving the drive of the reciprocating drive source, and can be moved integrally with the slider and relatively movable. And a punch guide capable of pressing the plate member by receiving a pressing force of a slider, and an operation lever is rotatably attached to the slider. Further, on the movement path of the operation lever, a punch that is guided by the punch guide and that can reciprocate is arranged.
The operation lever is configured to rotate along a cam member between a position where the punch can be pressed and a position where the punch cannot be pressed. On the other hand, on the moving path of the punch, the tool changing unit has a die having a hole for burring through which the punch can enter and capable of supporting a plate material together with the punch guide, and a burring portion formed by burring. The crimping anvil is configured to be selectively arranged. The cam member is constituted by a pair of members which can be expanded and urged to be always closed, and has a stepped cam formed by combining grooves having an inclined bottom surface on the opposing surfaces thereof. A groove is formed to prevent the operation lever from moving backward.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6, reference numeral 1 denotes a burring caulking device, which has a reciprocating drive source 14 arranged on the machine base 2. The reciprocating drive source 14 includes a motor 3 attached to the machine base 2, a crank member 4 rotatably supported by the machine base 2, and a crank member 4 for driving the motor.
Pulleys P1, P2 and endless belt B for transmitting to a crank member 4 and a crank arm 5 rotatably connected to the crank member 4.
2 rotatably connected to the other end of the crank arm 5
And links 6a and 6b. The crank arm 5 is supported at a position eccentric from the rotation center of the crank member 4, and performs a crank motion with the rotation of the crank member 4. One of the links 6a and 6b has one end rotatably connected to the upper portion of the machine base 2 and the other link 6b has an end connected to the upper end of a slider 8 described later. It is configured to be rotatably connected.

At the front of the machine base 2, a substantially sleeve-shaped punch guide 7 is slidably guided in the vertical direction.
A slider 8 to which the link 6b is connected is slidably inserted into the punch guide 7.
It is configured to reciprocate along the punch guide 7 by the rotation of a and 6b. The punch guide 7 is constantly urged vertically downward by the spring 9, that is, downward on the slider 8.

The slider 8 comprises a shaft portion 8a inserted into the punch guide 7 and a pressing portion 8b integrally formed above the shaft portion 8a. The pressing portion 8b is provided on the upper surface of the punch guide 7. It is configured so that it can be locked and pressed. A cutout groove 8c is formed in the shaft portion 8a, and an L-shaped operating lever 10 is attached to the cutout groove 8c so as to be rotatably supported at one end by a pin 11. The other end of the operation lever 10 is always connected to the notch window 7a of the punch guide 7 and the notch 2 of the machine base 2.
a protrudes forward from the machine base 2 through a, and its tip is fitted in a cam groove 16 described later. A conical fitting hole 10a is formed on the bottom surface of the operation lever 10 so that an upper end of a punch 12 described later can be fitted. The pin 11 supporting the operation lever 10
Is fitted into an elongated hole 7b provided in the punch guide 7 so as to protrude from the circumferential surface of the slider 8, so that the slider 8 can move relative to the punch guide 7 by the length of the elongated hole 7b. Is configured.

A punch 12 slidable along the punch guide 7 is disposed below the operation lever 10 in a state where the punch 12 is constantly urged downward by a spring 13. The upper end of the punch 12 is formed in a conical shape, and can match the fitting hole 10a of the operation lever 10. Further, in front of the operation lever 10, it is located in front of the machine base 2,
A pair of expandable cam members 15 and 15 are attached by a spring in such a manner that they are always closed by a spring. On the opposing surfaces of the cam members 15, 15, cam grooves 16, 16 into which the other end of the operation lever 10 is always fitted are formed symmetrically.

The cam grooves 16, 1 of the cam members 15, 15 are provided.
6 is a first vertical groove 16a extending in the vertical direction;
A first inclined groove 16b communicating with the vertical groove 16a;
The second vertical groove 16c communicates with the inclined groove 16b and extends in parallel with the first vertical groove 16a, and the second inclined groove 16d passes through the second vertical groove 16c and the first vertical groove 16a. I have. The bottom of each of these grooves is inclined except for the second vertical groove 16c, and the first vertical groove 16a and the first inclined groove 16b, the first inclined groove 16b and the second vertical groove 16c, and the second inclined groove 16d are formed. Each communication position of the first vertical groove 16a is configured in a stepped shape with a different bottom surface height.

The operating lever 10 is rotated by being guided by the cam groove 16. At this time, each of the grooves 16a, 16b,
Since the heights of the bottom surfaces of 16c and 16d are different at each communication position, for example, the first vertical groove 16a to the first inclined groove 16b
After moving to, the first vertical groove 16a cannot be reversed, and is always guided in the order of the first vertical groove 16a, the first inclined groove 16b, the second vertical groove 16c, and the second inclined groove 16d. The first inclined groove is provided with a vertical portion extending on an extension of the first vertical groove.

On the other hand, a punch 12
A downwardly protruding arm portion 17 is integrally attached, and a tool changing unit 18 which can selectively arrange a die 27 and an anvil 28 described below below the punch 12 is disposed on the arm portion 17. The tool changing unit 18 includes a first slide member 19 slidably disposed along the upper surface of the arm 17, and a rack gear 20 is integrally fixed to the first slide member 19. . A cylinder 21 is provided at the base end of the arm 17.
Is attached, and the rod 21 of the cylinder 21
a has a second slidable member on the first slide member 19;
The slide member 22 is connected. A spring 23 is housed inside the second slide member 22, and a stopper 24 is attached to the rear end thereof. The first slide member 19 is always moved backward by the spring 23. It is configured to be urged and locked to a stopper 24 to stop at a predetermined position. Further, the arm 17
A stopper (not shown) is attached to the moving path on the retreating side of the first slide member 19 so as to stop the retreating first slide member 19 at a predetermined position.

A tool support 26 is rotatably disposed on the second slide member 22.
A die 27 and an anvil 28 are mounted on symmetrical positions on the upper part of 6, respectively. The die 27 is formed in a substantially cylindrical shape penetrating a burring hole 27a into which the punch 12 can enter, and the anvil 28 has a substantially conical projection 28a on the upper surface of a columnar member.
And an annular folded groove 28b surrounding the projection 28a. Further, the rack gear 2 is always provided at a lower portion of the tool support 26 via a one-way clutch 29.
The pinion gear 30 meshing with the pinion 0 is attached.
The one-way clutch 29 is configured to integrally rotate the tool support 26 only when the pinion gear 30 is rotationally moved to the cylinder 21 side.

The tip of the arm 17 is provided with the die 2
A stop position 31 having a wall portion 31a to which the abutment 7 and the anvil 28 can contact is set, and the die 27 and the anvil 28 are configured to be positioned on the moving path of the punch 12. Also, at the tip of this arm 17,
A discharge hole 17b opening at the stop position 31 is formed so as to penetrate therethrough, and is configured to communicate with the die 27 when the die 27 is positioned at the stop position 31. This discharge hole 1
A connecting sleeve 32 for connecting a hose extending from an external collecting device (not shown) is connected to a lower portion of 7b. The connecting sleeve 32 moves up and down along the front surface of the arm portion 17. A possible workpiece support 33 is slidably inserted. The work support member 33 can place a steel plate (hereinafter, referred to as a steel plate S) serving as a work on the upper surface thereof, and the upper surface is always located between the tool changing unit 18 and the punch 12. The spring is biased by a spring 34.

In the burring crimping machine 1, when the slider 8 is at the top dead center, the die 27 is positioned at the stop position 31 as shown in FIG. When a plurality of steel plates S in a state are placed and a start switch (not shown) is pressed, the motor 3 is driven to rotate forward to rotate the crank member 4, and the crank arm 5,
The links 6a, 6b are respectively rotated accordingly. When the links 6a and 6b rotate, the slider 8 and the punch guide 7 are integrally lowered by the bias of the spring 9, and the steel sheet S is pushed by the punch guide 7. For this reason, the work supporting member 33 also descends against the spring 34, and the steel plate contacts the die 27. At this time, since the operation lever 10 is guided by the first straight groove 16a of the cam groove, the fitting hole 10
a descends in a posture that can match the upper end of the punch 12 (a posture in which the punch 12 can be pressed). At this time, since the bottom surface of the cam groove 16 is inclined, the cam members 15 and 15 are expanded as the operation lever 10 moves.

When the steel sheet S comes into contact with the die 27 and the punch guide 7 stops, the slider 8 descends along the punch guide 7 and, as shown in FIG.
The punch 12 is lowered integrally by aligning the fitting hole 10a with the upper end of the punch 12. As a result, FIG.
As shown in (a), the tip of the punch 12 protrudes from the punch guide 7 and enters the burring hole 27a of the die 27, and performs burring on the steel sheet S to form the burring hole S.
1 and a burring portion S2 formed integrally with the periphery of the burring hole S1. A punching swarf generated by the formation of the burring hole S1, that is, a part of the steel sheet S torn off by the penetration of the punch 12 falls through the discharge hole 17b of the arm 17 and is connected to a hose ( (Not shown) and collected by a collecting device (not shown).

At the time when the burring is performed by the punch 12, the slider 8 is turned upward by the crank action and the link action.
2 and rotates along the first inclined groove 16b. Also, as the slider 8 rises, the pin 11
, The punch guide 7 and the punch 12 also rise as a unit. At this time, the work supporting member 33 is urged by the spring 34 and follows the rise of the punch guide 7, so that the steel plate is separated from the die 27. Further, after the operation lever 10 is separated from the punch 12, as shown in FIG. 8A, the operation lever 10 is guided to the second linear groove 16c through the first inclined groove 16b as the slider 8 rises, and the punch 12 is not pressed. Rotate to a possible posture. Since the cam groove 16 has a stepped shape at a key point, each time the operation lever 10 exceeds the step, the cam members 15 and 15 follow and rotate.

When a sensor (not shown) detects that the operating lever 10 has been guided to the second vertical groove 16c, the driving of the motor 3 is temporarily stopped, while in the tool changing unit 18, the cylinder 21 is operated and the first The slide member 19 and the second slide member 22 are retracted integrally. At this time,
The first slide member 19 is retracted integrally with the second slide member 22 by the bias of the spring 23. At that time, rack gear 2
Since the 0 and the pinion gear 30 move integrally, the tool support 26 moves without rotating, and the die 27 moves horizontally and separates from the stop position 31. Thus the die 27
Is released from the stop position 31, the first slide member 19
Abuts against a stopper (not shown) and stops, and only the second slide member 22 retreats to rotate the pinion gear 30 along the rack gear 20. At this time, the one-way clutch 2
Since the tool support 26 can rotate integrally with the pinion gear 30 by the operation of 9, the tool support 26 is rotated half a turn to exchange the positions of the die 27 and the anvil 28 before the second slide member 22 stops. Can be.

Thereafter, the cylinder 21 moves back and the rod 2
When 1a is extended, first, the second slide member 22 advances with respect to the first slide member 19 to rotate the pinion gear 30 along the rack gear 20, but at this time, only the pinion gear 30 is rotated by the one-way clutch 29. , The positions of the die 27 and the anvil 28 do not change. Then, the second slide member 22 abuts on the first slide member 19, moves it integrally, and positions the anvil 28 by abutting the wall portion 31 a at the stop position 31.

As described above, when the tools (die 27 and anvil 28) are exchanged by the tool exchange unit 18, the motor 3 is subsequently driven in reverse to lower the slider 8 again. As a result, as described above, the punch guide 7 also moves down to push down the steel sheet S, so that the projection 28a of the anvil 28 fits into the burring hole S1. At this time, as shown in FIG. 8B, since the operation lever 10 is guided to the second vertical groove 16c in a rotated state, the punch 1
2 cannot be pushed, and the punch 12 is pushed by the projection 28 a of the anvil 28 and retreats into the punch guide 7. Further, the punch guide 7 presses the steel sheet S against the anvil 28 by receiving the pressing force of the slider 8, so that the steel sheet S is caulked to form the burring portion S2 as shown in FIG.
To the protruding portion 28a of the anvil 28 and the return groove 28b.
Can be crimped along.

Thereafter, since the driving of the motor 3 is the reverse rotation driving, the slider 8 integrally returns to the top dead center together with the punch guide 7, the punch 12 and the like, contrary to the case where the motor 3 is driving the normal rotation. . At this time, the operation lever 10 is guided from the second vertical groove 16c through the second inclined groove
Since the fitting hole 10a reaches the vertical groove 16a, the fitting hole 10a pivots and returns to a position positioned above the punch 12. On the other hand, in the tool changing unit 18, the position of the die 27 and the anvil 28 is changed by the above-described operation, and the die 27 is moved to the stop position 31 again.
Are positioned to prepare for the next operation. In the burring work described above, the cam groove is stepped,
Reverse movement of the operation lever 10 can be prevented.

[0022]

As described above, the burring caulking device of the present invention is configured such that the punch is reciprocally movable along the punch guide, the operation lever is guided by the cam member, and the punch is formed according to the working state. Since it is configured to rotate between a pressable position and a non-pressable position, the operating environment of the punch can be switched by the operation lever, and it can respond to burring and caulking, respectively. A well-known burring die and an anvil dedicated to burring can be used to ensure good burring.
There are advantages that the adjustment work and the like can be simplified. In addition, since the cam member is constituted by a pair of expandable members biased so as to be always closed, even if a cam groove having an inclined bottom surface is formed on the opposing surface, the operation lever is moved along the cam groove. It can be guided well, and the combination of the inclined bottom surface and the stepped cam groove prevents the operation lever from moving backward,
There are advantages that the punch can always be operated correctly.

[Brief description of the drawings]

FIG. 1 is a front view of a burring caulking device with a part cut away.

FIG. 2 is an enlarged partial cutaway sectional view of a main part of a burring crimping device.

FIG. 3 is an enlarged side view of a main part of the burring crimping device.

FIG. 4 is an enlarged partial cutaway sectional view of a main part showing a tool changing unit.

FIG. 5 is a perspective view showing one of the cam members.

FIG. 6 is a front view showing one of the cam members.

FIG. 7 is an explanatory view of the operation of the burring crimping device.

FIG. 8 is an operation explanatory view of the burring crimping device.

FIG. 9 is an enlarged partial cutaway sectional view of a main part showing a burring state and a caulking state.

FIG. 10 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 1 Burring caulking device 3 Motor 4 Crank member 5 Crank arm 6a Link 6b Link 7 Punch guide 8 Slider 10 Operation lever 12 Punch 14 Reciprocating drive source 15 Cam member 16 Cam groove 18 Tool exchange unit 27 Die 28 Anvil 33 Work support

Claims (3)

(57) [Claims] A burring apparatus for forming a burring hole in a plurality of plate materials in a stacked state to form a burring portion on a peripheral edge thereof, and for caulking the burring portion on the peripheral edge of the burring hole to join the plate materials. A slider capable of reciprocatingly moved by receiving a drive from a reciprocating drive source, being movable integrally with and relatively movable with the slider, and capable of pressing the plate member by receiving a pressing force of the slider. A punch guide, an operation lever rotatably attached to the slider, a punch located on a movement path of the operation lever, reciprocally guided by the punch guide, and guiding the operation lever, A cam member for rotating the punch between a position where the punch can be pressed and a position where the punch cannot be pressed, and a burring where the punch can enter. A die having a hole and capable of supporting a plate material together with the punch guide, and a tool changing unit capable of selectively arranging an anvil for folding and crimping a burring portion formed by burring on a moving path of the punch. Burring device 2. The burring crimping device according to claim 1, wherein the cam member comprises a pair of expandable members which are urged to be always closed. The cam member has a stepped cam groove formed by combining a groove having an inclined bottom surface on its opposing surface, and the cam groove prevents the operation lever from moving backward. The burring crimping device according to claim 2, wherein