JPH0441027A - Device for jointing metallic sheet - Google Patents

Abstract

PURPOSE:To allow to automatically execute the caulking joint at plural points of laminated part by supporting a pair of press unit having the die and the punch in freely movable vertically and horizontally. CONSTITUTION:The 1st joint point is caulked and jointed firmly by positioning the 1st joint point in laminated state between the punch 47 and the die 48 of each press unit 10, advancing the elevating/lowering ram 42 with the power unit 44 of each press unit 10 and pressing the punch 47 in contact with the 1st joint point. The punch 47 and the die 48 of each press unit 10 is separated from the 1st joint point. Next, the punch 47 and the die 48 of each press unit 10 is positioned to the position opposing to the 2nd joint point under the 1st joint point. And this part is caulked on the same way as the above in this state, and this part is fixed firmly, then further the 3rd joint point positioned under the 2nd joint point is caulked on the same way, and this part is jointed firmly.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a metal plate joining device, and more specifically, the present invention relates to a metal plate joining device, and more specifically, the present invention relates to a metal plate joining device.
The present invention relates to a coupling device that couples the above two together by caulking by upsetting deformation using a die and a punch.

[Conventional technology]

In the assembly process of a refrigerator, there is a step of reinforcing the bottom of a panel body forming the top and both side surfaces of the refrigerator with rain hose sides. As shown in FIG. 12, the panel main body (A) consists of an upper surface portion (B) and a pair of opposing side surface portions (C), which are connected to the upper surface portion (B) and have a flange (D) on the peripheral edge thereof. is formed. Furthermore, the rain hose side (E) that reinforces the bottom of the side surface (C) of the panel body (A) is formed by bending an angle member with a cross-sectional shape into a substantially U-shape. , and when reinforcing the bottom of the side part (C) with the rain hose side (E), the rain hose side (E) is positioned at the bottom of both side parts (C), and the rain hose side (E) is positioned at the bottom of the side part (C). The side (F) and bottom side CG) of the rain hose side (E) are brought into contact with the flange (D), respectively. In this state, spot welding is performed at multiple locations at the overlapped portions of the flange (D) and the side (F) and bottom side (G) of the rain hose side (E), so that both side surfaces of the panel body (A) are Fix the rain hose side (E) to the bottom of (C),
As a result, the bottom portions of both side surfaces (C) are reinforced.

[Problem to be solved by the invention]

When reinforcing the bottom of the side surface (C) of the panel body (A), as described above, the flange (D) located at the bottom of the side surface (C) and the rain hose side (E) overlap. If the panel body (A) is made of a special metal plate such as a colored steel plate, if the panel body (A) is made of a special metal plate such as a colored steel plate, it will be difficult for current to flow to the welded parts during spot welding, and sufficient joint strength will be obtained. The problem was that it became very difficult to Also, rivets and bolts,
It is also possible to use nuts to connect the two, but in order to use the above method, holes must be drilled in advance, and a separate supply device is required to supply connecting tools such as rivets, bolts, nuts, etc. Therefore, there was a problem that the joining work became extremely complicated and led to an increase in costs.

[Means to solve the problem]

A metal plate coupling device is arranged so as to be slidable in a horizontal direction on the same straight line as a first slide unit consisting of a first slide base that is moved up and down by a servo motor and a ball screw. The second slide base is slid by a servo motor and a ball screw, and the second slide base and the third slide base are connected to the first slide base.
A second slide unit connected via a cylinder and configured to allow a fourth slide base to slide by a second cylinder installed on the first slide base, and supported by the third and fourth slide bases, respectively. , a power unit for sliding an elevating ram having a punch at its tip, and a pair of press units comprising a yoke supporting a die at a position facing the punch.

[Effect]

As described above, by upsetting and deforming a predetermined position of the overlapping portion of two members, and supporting a pair of press units having a die and a punch for crimping and joining them so as to be movable in the vertical and horizontal directions, the panel This makes it possible to automatically perform caulking connections at multiple locations where the flange located at the bottom of the side surface of the main body overlaps with the bottom of the rain hose side.

〔Example〕

1 to 3 show a metal plate joining device (1) according to the present invention.
), Fig. 1 is a perspective view schematically showing the metal plate joining device (1) installed on a refrigerator assembly line, and Fig. 2 shows the overall configuration of the metal plate joining device (1). The plan view and FIG. 3 are side views. In the same figure, (A) shows that the rain hose side (E
) with the panel body (A) in the locked state,
A conveyor (b) for transporting the panel body (A) transported by the transport conveyor (a) to the front of the metal plate joining device (1) transports the panel body (A) in front of the metal sheet joining device (1). To lift the panel body (A) from the conveyor (A) and, in this state, position and hold the panel body (A) in front of the metal plate joining device (1) in a state where it can slide toward the metal sheet joining device (1). The positioning unit (c) pushes out the panel body (A), which is positioned and held by the positioning unit (b), toward the metal plate bonding device (1), thereby positioning it on the side surface of the panel body (C). This is a button shear for setting the overlapping part of the flange (D) and the rain hose side (E) to the working position of the metal plate joining device (1).

The flange (D) located at the bottom of the side surface (C) of the panel body (A), which is positioned and held at a predetermined working position by the various devices mentioned above, and the bottom side (G) of the rain hose side (E)
) A metal plate joining device (1) for performing caulking at multiple locations with a machine base (2), a frame-shaped post (3) supported by the machine base (2), and a post (3). ) a first slide unit (4) having a first slide base (5) supported vertically movably; and a first slide unit (4) supported on the first slide base (5) so as to be slidable horizontally 2nd to 4th slide bases (7) (8)
(9), and a pair of press units (10) (10) which are arranged opposite to each other by third and fourth slide bases (8) and (9).

The support structure of the first slide unit (4) by the support column (3) is shown in FIGS. 4 and 5.

In the same figure, (12) is a frame-shaped support (3)
(13) is a pair of guide rails arranged opposite to each other on both sides of the frame plate (11), and (14) is a pair of guide rails (13) (
13) Two movable bodies are arranged on each side so as to be slidable in the vertical direction, and (5) is a first slide base that is slidably supported by the four movable bodies (14). be. (15) is the bearing (16) (1
7), a ball screw rotatably supported through (18)
) is a feed nut screwed onto the ball screw (15),
This feed nut (18) and the first slide base (5) are connected via a movable frame (19). Then, this ball screw (15) is rotated by a predetermined amount by a servo motor (20) fixed to the center of the upper end of the support column (3), and the feed nut (18) is moved up and down by a predetermined amount on the ball screw (15). , 1st slide base (5)
This allows it to be positioned and held at a predetermined height. In addition, (21) in the figure is a counter cylinder which is fixedly installed on the machine base (2) and whose piston rod (22) is connected to the movable frame (19).
21) to receive the load applied to the first slide base (5).

The second and third slide bases (7) of the second slide unit (6) are arranged on the first slide base (5).
)(8) has the structure shown in FIGS. 6 and 7.

In the figure, (23) (23) is a pair of guide rails arranged horizontally in parallel on the first slide base (5), (24) and (25) are a pair of guide rails (2
3) (23) Two movable bodies arranged on each side so that they can slide freely in the horizontal direction, (7)
(8) is a second slide base slidably supported by four movable bodies (24), and (8) is a second slide base supported by four movable bodies (24).
5) is a third slide base slidably supported by. (26) is a first cylinder fixed on the second slide base (7);
The tip of the piston rod (27) of 6) is connected to a bracket (28) fixed to the third slide base (8), and by expanding and contracting this first cylinder (26), the guide rail (23) ( 23) At the top, the distance between the second slide base (6) and the third slide base (7) can be varied. (29) (29) is a connecting rod bridged between the third slide base (8) and the second slide base (7) in order to smoothly slide the third slide base (8) relative to the second slide base (7) due to the expansion and contraction of the first cylinder (26). One end of this connecting rod (29) (29) is attached to the connecting plate (29) installed upright on the third slide base (8).
30) (30), and the other end slidably passes through the support plate (31) (31) installed upright on the second slide base (7), and the tip has a pullout. (32) (32) is screwed together. The connecting ronds (29) (29) serve as guides when the third slide base (8) slides with respect to the second slide base (7).

(33) is a ball screw rotatably supported horizontally in the center of the first slide base (5) via bearings (34) and (35), and (36) is a feed nut screwed onto the ball screw (33). The feed nut (36) is connected to the second slider (7) via a bracket (37). This ball screw (33) is connected to a servo motor (3) placed on the side edge of the first slide base (5).
8) and horizontally move the feed screw (36) by a predetermined amount on the ball screw (33), the second slide base (7) can be positioned and held at a predetermined position on the first slide base (5). That's how it is. or,
As the second slide base (7) moves, the third slide base (8) also moves, and the first cylinder (26
) by expanding and contracting the third slide base (8).
can be further slid by the stroke of the first cylinder (26). Also, the fourth slide base (9
) is the guide rail (23) (as shown in Fig. 2).
Similar to the second and third slide bases (7) and (8), the movable bodies (39) arranged two each on the fourth slide base (23) are supported so as to be slidable in the horizontal direction. 9) The servo motor (3) at the end of the first slide base (5) is attached to the connecting plate (40) installed upright.
8) A second cylinder (4
Since the tip of the piston rond (42) of 1) is connected, the fourth slide base (9) is connected to this second cylinder (42).
41) so as to be able to move horizontally by the stroke.

The second to fourth slide bases (7) (8) (9) mentioned above.
) A pair of press units (10
) is a lifting ram (4) as shown in Figures 1 to 3.
Power unit (44) for moving 3) back and forth in the figure.
and a yoke (45) extending forward from the power unit (44), and the lifting ram (43)
) is attached to the tip of the punch ( ) via the punch holder (46).
47) is fixed, and the punch (47) of the yoke (45) is fixed.
A die (48) is fixed to the portion facing the die (47). To attach the press unit (10) having the above configuration to the third slide base (8), place the power unit (10) between the pair of columns (49) (49) set up on the third slide base (8). And this pillar (49) (
Slide guide (50) that is slidably inserted into the
) (50), the yoke (
45) by fixing it on both sides of the
The tip of the yoke (45) is connected to the tip of the piston rond of the equalizer cylinder (52), which is fixed to the connecting portion (51) bridged between the tips of the struts (49) (49). By expanding and contracting the power unit (10), the entire power unit (10) can be moved back and forth by a predetermined amount with respect to the third slide base (8).

Also, the fourth slide base (9) of the press unit (10)
) is exactly the same as the support structure for the third slide base (8), so the explanation will be omitted.

The punch (47) and die (48) set in the press unit (10) have a structure as shown in FIG. 10, and a stripper cap (70) is placed around the punch (47). A stripper (72) is arranged via a spring (71) and a die (48).
is formed by an anvil (73) and a blade (74) arranged around the anvil (73) so as to be openable and closable. The two members to be connected between them, in this example, the flange CD of the panel body (A) and the bottom CG of the rain hose side (E), are positioned, and in this state, the forward movement of the lifting ram (43) When the overlapping portion of the two members is locally pressed toward the die (48) by the advance of the punch (47), this portion is upset and deformed and crimped as shown in FIG. The two are strongly connected.

In order to fix the rain hose side (E) to the bottom of both side surfaces (C) and (C) of the panel main body (A) using the metal plate joining device (1) having the above structure, first, the rain hose is attached to the bottom of the panel body (A). Temporarily fasten the side (E). For this temporary fixing method, set the rain hose side (E) at the bottom of each side part (C), and attach the bottom flange (D) to the side (F) and bottom side (G) of the rain hose side (E). ), one point of the overlap between the flange (D) and the side (F) is manually operated using a handy type press unit having the same function as the press unit (10) described above. By caulking and joining this part, the rain hose side (E) and both side parts (C)
Temporarily fasten each to the bottom of (C).

In this way, the panel body (A) with the rain hose sides (E) and (E) temporarily fixed to the bottom of both side parts (C) and (C), respectively, is set in the metal plate joining device (1), and each side Multiple locations of the overlapping portion between the bottom flange (D) of the part (C) and the bottom side (G) of the rain hose side (E), for example, the first to third connection points (x) shown in FIG. y)(z)
In order to caulk the three points, first, as shown in Figure 8,
The first and second cylinders (26) of the slide unit (6)
) (41), slide the third and fourth slide bases (8) and (9) inward of the first slide base (5), and at the same time extend the second slide base (41).
7) toward the fourth slide base (9) together with the third slide base (8) by the rotational movement of the ball screw (33) by the servo motor (38). (8) A pair of press units (10) supported by (9)
The distance (N) in (10) is set to be narrower by a predetermined amount than the distance (m) at the narrowest part between the opposing side surfaces (C) of the panel body (A). Further, the ball screw (15) of the first slide unit (4) is rotated by the servo motor (20), and the first slide base (5) is rotated by the servo motor (20).
By moving up and down, the first slide base (5)
The height of the joining point of the pair of press units (10) (10) supported via the third and fourth slide bases (8) and (9) is such that the panel set on the metal plate joining device (1) The height should match the height of the first connection point (X) of the main body (A). In addition, two equalizer cylinders (5
2) (52) is shortened and each press unit)
(10), the third and fourth slide bases (8) (9
). In this state, the panel body (A), which has been temporarily fastened, is transported to the front of the metal plate joining device (1) by the transport conveyor (A) according to the procedure described above, and is positioned. After being held in position by the unit (B), it is pushed out towards the metal plate joining device (1) by the button shear (C), and the flanges (D) of both side parts (C) of the panel body (A) are (D) and the bottom side (G) of the rain hose side (E) (E), the first bonding point (x) (x) of the overlapping part is connected to the pair of press units (1
0) (10), the first and second cylinders (26) and (41) are shortened. Then, by sliding the third and fourth slide bases (8) and (9) outward, the punch (47) and die (48) of each press unit (10) are removed.
In between, the first connecting point (X) between the flange (D) and the bottom side (G) which are in a superposed state is located, and each equalizer cylinder (52) is further extended, and each press unit (10) is moved backward. By sliding each press unit (
The die (48) of 10) is stably brought into contact with the first connection point (x) of the bottom (C) of the rain hose side (E) (shape 11 in Fig. 9), and in this state, The elevating ram (42) is advanced by the power unit (44) of each press unit (10), and the punch (47) is
By pressing the connection point (X), the flange (D)
Then, the first connecting point (x) of the bottom side (G) is caulked as shown in FIG. 1 to firmly connect this part. When the connection of the first connection point (X) between the flange (D) and the bottom side (G) is completed in this way, the elevating ram (43) is assembled by each power unit (44), and at the same time, each equalizer cylinder (52) ), the punch (47) and die (48) of each press unit (10) are moved away from the first connection point (X). Next, the ball screw (1) is driven by the servo motor (20) of the first slide unit (4).
5) by a predetermined amount and lower the first slide base (5) by a predetermined amount.
The punch (47) and die (48) of each press unit (10) supported via the third and fourth slide bases (8) and (9) are placed below the first connection point (x). It is located at a position opposite to the second connection point (y). Then, in this state, swage this part in the same way as above to firmly connect this part, and then do the same again to connect the second part.
The third connecting point (z) located below the connecting point (y) is caulked to firmly connect this part.

When the connection work of each connection point is completed as described above, the first
The pair of press units (1
0) After making sure that (10) does not interfere with the panel body (A), move the panel body (A) back with the pusher (c) to return it to its original transport position, and then proceed to the next , positioning unit (b)
By returning the panel body (A) onto the conveyor (A) again, the panel body (A) on which the rain hose side (E) has been attached is conveyed to the next process. Also, during this time, the first slide base (5) of the metal plate joining device (1) is raised, and the pair of press units (10)
(10) is positioned at a height corresponding to the first connection point (X), and when the next panel body (1) is conveyed in this state, the above operation is repeated from then on,
The attachment of the rain hose side (E) to the bottom of both side parts (C) and (C) of the panel main body (1) is automatically and sequentially performed.

〔Effect of the invention〕

As explained above, if the rain hose side is fixed to the bottom of both side surfaces of the panel main body using the metal plate joining device according to the present invention, the overlapping part between the flange at the bottom of the side surface and the bottom of the rain hose side can be pressed. By locally upsetting and deforming using the die and punch of the unit and caulking, this part can be firmly joined, so even if the panel body is made of a special metal plate such as a colored steel plate, the two above can be combined. This makes it possible to reliably connect them. In addition, the present invention does not require drilling work unlike rivets, bolts, nuts, etc. (and the joining time is almost instantaneous, so the work efficiency can be very high. By supporting the press unit so that it can move vertically and horizontally, it is possible to connect many types of panel bodies and rain hose sides, and it is also possible to connect both sides of the panel body and rain hose sides at the same time. Moreover, since it can be performed automatically, it is possible to realize high speed and automation of the work of joining the rain hose side to both side parts of the panel main body of various types.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a metal plate joining device according to the present invention installed in a refrigerator assembly line, FIGS. 2 and 3 are a plan view and a side view of the metal plate joining device, and FIGS. FIG. 5 is a front view and side sectional view of the first slide unit, FIG. 6 is a front view of the second slide unit, and FIG.
FIG. 6 is a sectional view taken along line 1-I, FIGS. 8 and 9 are plan views showing the operating state of the metal plate joining device according to the present invention, FIG. 10 is an enlarged sectional view of the punch and die, and FIG. 11 1 is an enlarged cross-sectional view showing how two members are joined by a punch and a die;
Figure 2 is a perspective view showing the panel body and the rain hose side. (4) - 1st slide unit (5) - 1st slide base, (6) - 2nd slide unit, (7) - 2nd slide base, (8) - 3rd slide unit, ( 9) - Fourth slide base, (10) - Press unit, (15) (20) - Servo motor, (26) (33) - Ball screw,
(38) (41) - second cylinder, (43) (4
4L --- Power unit, (45) (47) - Punch, (48) - Ball screw, - First cylinder, - Servo motor, - Lifting ram, - Yoke, - Die.

Claims (1)

[Claims] (1) A first slide unit consisting of a first slide base that is moved up and down by a servo motor and a ball screw, and a second slide unit that is arranged on the same straight line on the first slide base so as to be able to slide freely in the horizontal direction. to a fourth slide base, the second slide base is slid by a servo motor and a ball screw, the second slide base and the third slide base are connected via the first cylinder, and the fourth slide base is connected to the third slide base through the first cylinder. a second slide unit that is slid by a second cylinder installed on one slide base; a power unit that slides a lifting ram having a punch at its tip, which is supported by the third and fourth slide bases, respectively; A metal plate joining device comprising a pair of press units each comprising a yoke supporting a die at a position facing the punch.