JP2807990B2 - 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 laminated state, performs burring processing to form a burring portion on the peripheral edge of the burring hole, and turns over the burring portion formed by the burring processing to crimp. In this way, the plate members are joined. As shown in FIG. 11, the burring caulking device 50 includes a die 51 in which a burring hole 51b is formed by dividing a pair of expandable members 51a, 51a, 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 often expands or deforms due to the pressing force at the time of performing the burring process, and there is a problem that the burring process cannot be performed well. In addition, when a die dedicated to burring and an anvil dedicated to caulking are used, there is a problem that a tool cannot be automatically changed. In addition, conventionally known burring caulking devices include, for example, Utility Model Registration Publication No. 2501347.
Some tools have a die and anvil integrated as in No. 2, but the tool with the integrated die and anvil has the functions of both the die and the anvil. There are problems such as complicated and precise, difficult to manufacture and expensive.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a punch reciprocatingly driven by the driving of a reciprocating drive source, and a punch which can enter a moving path of the punch. A tool having a burring hole, a tool exchange unit capable of alternately positioning an anvil that folds and crimps a burring portion formed by burring, and guides the punch so that it can protrude,
A punch guide capable of sandwiching a plate material together with the die or anvil, a burring process is performed to form a burring hole on a plurality of plate materials in a stacked state to form a burring portion on the periphery thereof, and a burring of the periphery of the burring hole. The tool change unit is configured to rotatably provide a tool support that supports the die and the anvil, and receives the operation of the reciprocating drive source. And a pinion gear is connected to the tool support via a one-way clutch, and a rack gear meshing with the pinion gear and movable integrally with the tool support and capable of stopping at a predetermined position is provided. It is configured.

[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 first reciprocating drive source 14 arranged on the machine base 2. The reciprocating drive source 14 includes a motor 3 mounted on the machine base 2, a crank member 4 rotatably supported by the machine base 2, pulleys P1 and P2 for transmitting the drive of the motor to the crank member 4, and an endless belt. B
And a crank arm 5 rotatably connected to the crank member 4, and two links 6 a and 6 b rotatably connected to the other end of the crank arm 5. 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 end of the links 6a and 6b is rotatably connected to the upper part of the machine base 2 at one end, and the other link 6b is
The distal end is rotatably connected to an upper end of a slider 8 described later.

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 operation lever 10 is rotated by being guided by the cam groove 16, and at this time, each of the grooves 16a, 16b, 16
Since the heights of the bottom surfaces of c and 16d are different at each communication position, for example, after moving from the first vertical groove 16a to the first inclined groove 16b, it is not possible to reverse the first vertical groove 16a. Vertical groove 16a, first inclined groove 16b, second vertical groove 1
6c and the second inclined groove 16d are guided in this order. 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 17 is integrally attached to the arm 17, and a tool changing unit 18 capable of selectively arranging a die 27 and an anvil 28 is disposed below the punch 12. This tool changing unit 18
A first slide member 19 is provided slidably 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 as an example of a second reciprocating drive source is attached to the base end of the arm 17.
A second slide member 22 slidable on the first slide member 19 is connected to one rod 21a. 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 the stopper 24. Further, a stopper (not shown), which is located on the retreating side movement path of the first slide member 19, is attached to the arm portion 17,
The first slide member 19 is configured to stop 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 symmetrically on a pitch circle centered on the rotation center of the tool support base 26 on the upper part of 6. The die 27 is formed in a substantially cylindrical shape penetrating a burring hole 27a through which the punch 12 can enter, and the anvil 28 has a substantially conical projection 28a on the upper surface of a columnar member. , The projection 28
This is a configuration in which an annular folded groove 28b surrounding a is formed. Further, a pinion gear 30 which is always engaged with the rack gear 20 via a one-way clutch 29 is attached to a lower portion of the tool support base 26. 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 supporting member 33 can place a steel plate material (hereinafter, referred to as a steel plate S) serving as a work on its upper surface, 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 stacked state are placed on the stack and a start switch (not shown) is pressed, the motor 3 is driven to rotate forward to rotate the crank member 4 and rotate the crank arm 5 and the links 6a and 6b respectively. Move.
When the links 6a and 6b are rotated, the slider 8 and the punch guide 7 are lowered integrally by the bias of the spring 9,
The steel sheet S is pressed 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 linear groove 16a of the cam groove 16, 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 moves down along the punch guide 7 as shown in FIG. 10a matches the upper end of the punch 12,
The punch 12 is lowered integrally. As a result, as shown in FIG. 10A, the tip of the punch 12 projects from the punch guide 7 and enters the burring hole 27a of the die 27. A burring portion S2 formed integrally with the periphery of the burring hole S1 is formed. A part of the steel sheet S that was punched out during the burring process, that is, a part of the steel sheet S that was torn through the punch 12 was
b falls and is sucked and collected by a collection device (not shown) through a hose (not shown) connected to the connection sleeve 32.

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, as shown in FIG. 8A, after the operating lever 10 is separated from the punch 12, the operating lever 10 is guided to the second linear groove 16c through the first inclined groove 16b and rotates by a predetermined angle as the slider 8 rises. , The punch 12 changes to a position where it cannot be pressed. 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 the tool changing unit 18 is operated as shown in FIG. Then, the cylinder 21 is actuated to move the first slide member 19 and the second slide member 22 together in the direction indicated by the arrow E. At this time, the rack gear 20
Since the pinion gear 30 and the pinion gear 30 move together, the die 27 is moved horizontally and is separated from the stop position 31 without rotating the tool support 26. Subsequently, when the first slide member 19 comes into contact with a stopper (not shown) and stops, only the second slide member 22 retreats and the pinion gear 30 moves along the rack gear 20 as shown in FIG. Rotate. At this time, the tool support 26 is rotated halfway in the direction of arrow F integrally with the pinion gear 30 by the action of the one-way clutch 29, and the positions of the die 27 and the anvil 28 are switched.

Thereafter, the cylinder 21 moves back and the rod 2
When the first slide member 19 is extended, as shown in FIG. 9C, the first slide member 19 and the second slide member 22 advance in the arrow G direction, and move the anvil 28 to the wall portion 31a at the stop position 31.
And position it. At this time, the one-way clutch 2
9, only the pinion gear 30 is rotated.
The positions of 7 and anvil 28 do not change.

The tool (die 2) is changed by the tool changing unit 18.
7 and the anvil 28) are exchanged, 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, FIG.
As shown in (b), since the operation lever 10 is guided in the second vertical groove 16c in a rotated state, the punch 12 cannot be pushed, and the punch 12
a and is retracted into the punch guide 7. Further, since the punch guide 7 receives the pressing force of the slider 8 and presses the steel sheet S against the anvil 28, as shown in FIG. It can be crimped so as to be folded along the groove 28a and the groove 28b.

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 crimping apparatus of the present invention is provided with the tool changing unit that can selectively arrange the die and the anvil on the moving path of the punch as needed, so that burring processing and crimping are performed. It is possible to use a dedicated die or anvil for each processing, and there is an advantage that the strength and reliability of the tool can be increased and a reliable burring work can be performed. In addition, a pinion gear is connected via a one-way clutch to a tool support that supports the die and the anvil, and the tool support is configured to be able to reciprocate in response to the operation of the cylinder, and is integrated with the tool support. A rack gear that is movable and stops at a predetermined position is provided, and the rack gear is configured to mesh with the pinion gear.
The dies for burring and the anvils for caulking can be automatically replaced, and the dies and anvils can be replaced at a position away from the work position, preventing the dies and anvils from interfering with the workpiece during replacement. There is an effect that a reliable burring work can be performed.

[Brief description of the drawings]

FIG. 1 is an enlarged partial cutaway sectional view of a main part of a burring crimping device.

FIG. 2 is a front view of a burring crimping device with a part cut away.

FIG. 3 is an enlarged partial cutaway sectional view of a main part of a burring crimping device.

FIG. 4 is an enlarged side view of a main part of the burring crimping device.

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 operation explanatory view of the burring crimping device.

FIG. 10 is a partially enlarged cross-sectional view of a main part showing a burring state and a caulking state.

FIG. 11 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 Reference Signs List 1 burring crimping device 3 motor 4 crank member 5 crank arm 6a link 6b link 7 punch guide 12 punch 14 first reciprocating drive source 15 cam member 18 tool changing unit 20 rack gear 21 cylinder 26 tool support 27 die 28 anvil 29 one-way clutch 30 pinion gear

Claims (2)

(57) [Claims] A punch having a burring hole into which a punch can enter on a moving path of the punch; and a burring portion formed by burring processing. A tool change unit that can alternately position the anvil to be folded back and crimped;
A burring process that includes a punch guide that guides the punch so as to be able to protrude, and that can pinch a plate with the die or anvil, and forms a burring hole in a plurality of stacked plate materials to form a burring portion on a periphery thereof. In a burring caulking device for caulking a burring portion at a peripheral edge of a burring hole and joining a plate material, the tool exchange unit rotatably provides a tool support for supporting a die and an anvil, and the tool support for the In addition to being configured to be reciprocally movable in response to the operation of the two reciprocating drive sources, a pinion gear is connected to the tool support via a one-way clutch, and meshes with the pinion gear so as to be integrally movable with the tool support and a predetermined movement. A burring caulking device comprising a rack gear that can be stopped at a position. 2. The burring crimping device according to claim 1, wherein the die and the anvil are arranged on the same pitch circle centered on the rotation center of the tool support.