JPH04210337A - Connecting device for box-like work - Google Patents

Abstract

PURPOSE:To make the connecting device applicable to a box-like work with an opening by providing a work positioning means consisting of a movable presser-jig for fixing and supporting the box-like work at a calking-connecting position, and a drive of the presser-jig. CONSTITUTION:A duct W provided with a yoke inserting opening 33, a bent piece 34, flange 35, 35 parts, is loaded on a pallet 15 and carried into a calking- connecting position, and a movable type presser-jig 12a is lowered together with a piston rod 13a by an air cylinder device 13 of a work positioning means IV. Then an inclined supporting table 4 of a first moving means I is moved horizontally by an air cylinder device 1 in the direction of a reference number (a) together with a third moving means III, a connecting mechanism C to move the connecting mechanism C below the starting position of connecting operations. Thereafter, by an air cylinder device 5 of a second moving means II, the third moving means III, the connecting mechanism C are moved diagonally upward by one step in the direction of (b) to align the portions 36a, 36b to be joined between punches 16 and dies 17 and in the same axis lines as those of the punches and dies.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement in a joining device used for crimping and joining the parts to be joined of a box-shaped workpiece manufactured by bending and forming metal plates. be.

[Conventional technology] Painted steel plates such as colored steel plates, damping steel plates, colored aluminum plates,
Alternatively, spot welding, riveting, screwing, etc. are used as means for joining box-shaped works formed by bending metal plates such as copper plates, such as the flange portions of fan heater ducts.

[Problems to be Solved by the Invention] Among the above-mentioned joining means, spot welding requires a qualified person with specialized technical knowledge regarding welding, and cannot be handled by an amateur. In addition, spot welding is difficult to join non-ferrous metal plates such as copper plates and aluminum plates, special steel plates such as vibration damping steel plates, or different metal plates, and it is also difficult to bond various types of coatings such as oil films and paint films. With steel plates and the like, these coatings must be removed in advance and repainted after welding is completed, resulting in increased costs. On the other hand, spot welding has drawbacks such as unavoidable spatter scattering, contaminating the workpiece and working environment, and generating harmful gases.

On the other hand, connecting methods using rivets, screws, or bolts and nuts require drilling work in advance, resulting in poor work efficiency and hindering labor savings.

In order to solve the problems of the prior art, a joining method has been devised in which two or more overlapping metal plates are joined together by upsetting and caulking using a punch and die. The applicant has also made a number of industrial proposals for improvements to this type of coupling device.

An object of the present invention is to improve the above-mentioned punch and die upsetting apparatus for metal plates so that it can be applied to a box-shaped workpiece with an opening, for example, a duct for a fan heater. .

[Means for Solving the Problems] As a means for solving the above problems, the present invention provides a punch that sequentially upsets and caulks together a plurality of parts of a box-shaped workpiece to be joined, a power actuator provided as a drive source for a die, The punch attached to the tip of the holder portion of this power actuator is attached with its axis aligned with the tip of the yoke extending from the side end of the power actuator body that supports the ram portion of the holder. A coupling mechanism in which two coupling heads consisting of dies are arranged parallel to each other and in line symmetry, a movable holding jig that fixes and supports the box-shaped workpiece at a caulking coupling position, and this presser. A device for joining box-shaped workpieces is provided, characterized by comprising: a workpiece positioning means comprising a jig driving device;

[Operation] A box-shaped workpiece, for example, a fan heater duct equipped with an opening for inserting a yoke and a die, is placed on a pallet and carried to the joining position (crimping joining position), and this box-like workpiece is held by a movable presser. The workpiece is positioned and fixed by a workpiece positioning means consisting of a jig and a drive device for the holding jig, for example, a fluid pressure cylinder device.

In this state, the coupling mechanism is horizontally moved in the first direction, that is, from the standby position downward to the coupling operation starting position.

After the upper horizontal movement is completed, it is moved in the second direction, that is, diagonally upward. At the time when the diagonally upward upward movement begins, the part of the box-shaped workpiece to be welded has not entered between the punch and the die of the joining head main body, but when the diagonally upward movement is finished, The part of the box-shaped workpiece to be welded is spaced apart from the punch and die and positioned so that they overlap.

In this state, the two joining heads are moved along with the movable support member in the third direction, that is, in the direction of approaching the box-shaped workpiece. As a result, the upper surface of the die comes into contact with the lower surface of the part of the box-shaped workpiece to be welded, and the preparatory movement for forward pushing of the punch is completed.

Then activate the power actuator of the coupling head,
The forward stroke is transmitted to a punch attached to the tip of the holder portion of this power actuator. As a result, the punch enters the inside of the die, and the parts of the box-shaped workpieces to be joined are caulked together.

After that, the power actuator is activated in reverse to release the engagement state between the punch and the die, and the joining head is moved back away from the box-shaped workpiece, so that the top surface of the die and the bottom surface of the part to be joined between the box-shaped workpieces are Maintain a predetermined distance between the

In this state, the joining head is moved obliquely upward, and the above caulking and joining operation is repeated at a second position diagonally above the first joining position. This completes the joining operation of the box-shaped workpieces.

[Embodiment] First, the structure of the coupling head (A) which forms the main part of the coupling station (C) will be explained based on FIGS. 2 and 5 to 10. As shown in FIG.
8) and (19) are disposed facing each other on the same axis. As shown in Fig. 5, the holder (1) of the punch (16)
8) is the ram (21) of the power actuator (20)
The holder (19) of the die (17) is fixed to the tip of a yoke (22) with a notch (!2a) extending laterally from the side end of the power actuator (20). The main body of the power actuator (20) and the tip of the yoke (22) are connected to a punch (16) and a die (17).
The relative installation positions are adjusted so that the axes of the

The two connecting heads (A) (A), which are arranged symmetrically with their axes parallel to each other, each have a sector-shaped space (23) forming a fluid pressure cylinder device and an apex position ( A rocking piston (25) that reciprocates by fluid pressure (air pressure or hydraulic pressure) with the rocking center at the rocking piston (24); (25) Swing center (24
) and a ram (21) that reciprocates on a straight line passing through the punch (16) and the die (17).

On the other hand, a stripper (27) is placed around the punch (16).
is punched (16) through the stripper holder (28).
The stripper (27) is supported so as to be slidable forward and backward along the axial direction of the punch (16), and the stripper (27) is constantly urged toward the tip of the punch (16) by a spring (29).

The punch (16) and die (17) are used to locally upset and deform the overlapping part of the fan heater duct (W), that is, the part to be joined, and swage the parts together. are illustrated in FIGS. 6 to 9.

Figures 6 to 9 show a circular upsetting type punch (16).
The tip of the punch (16) is cylindrical, and the tip surface is chamfered to form an arcuate surface (16).
b). Correspondingly, the die (17) is
As shown in FIGS. 8 and 9, a pair of die hole forming members (17a) (17b) are divided into two parts that can be opened and closed.
) and an upsetting pedestal member (17c), and the die hole forming members (17a) (17b) are pivotally connected to the upsetting pedestal member (17c) at their intermediate portions via pivots (17d) and (17e). A closing force is applied by a spring (17f) interposed between the rear ends of the die hole forming members (17a) and (17b). A circular die hole (17g) is formed on the opposing inner surface of the tip of the die hole forming member.

Next, the structure and operation order of the coupling mechanism, the first to third moving means, and the workpiece positioning means, which are the main parts of the present invention, will be explained based on FIGS. 1 to 4.

The first moving means (I) moves the coupling mechanism (C) including the coupling head (A) in a first direction as indicated by the reference number ■;
That is, a first fluid pressure cylinder device, for example, an air cylinder device (1) that is moved in the horizontal direction, and a support plate (2) that fixes the cylinder portion (1a) of the first air cylinder device (1). It is made up of.

The second moving means (n) includes the first air cylinder device (
An inclined support stand (4) fixed to the tip of the piston rod (1b) of 1) and horizontally movably supported on a guide rail (3) provided on the upper surface of the support plate (2); It is fixed so as to be substantially perpendicular to the upper surface of the table (4), and the forward stroke of the piston rod (5a) moves the coupling mechanism (C) together with the third moving means (m) described later in a second direction, that is, diagonally upward. A second fluid pressure cylinder device, for example, an air cylinder device (5) for pushing up and moving the second
The air cylinder device (5) is sandwiched between the air cylinder device (5) and upright guide members (6) are arranged opposite to each other on both sides of the air cylinder device (5). In the specific example shown, the upright guide member (6) includes a hollow cylindrical support member (6a) fixed to the upper surface of the inclined support base (4) with its axial direction substantially perpendicular to the upper surface of the inclined support base (4); The upper end is attached to the fixed support member (7) of the third moving means (III) described later.
), and the lower end of the hollow cylindrical receiver is fixed to the lower surface of the member (
The guide rod (6a) is slidably mounted in the guide rod (6a), and the fixed support member (7) and the receiver are arranged between the members (6a) for elastic support around the guide rod (6b). It is composed of a coil spring (6c).

On the other hand, the third moving means (III) includes the piston rod (5a) of the second air cylinder device (5), and
The upright guide member (6) is slidable on a fixed support member (7) fixed to the upper end of the guide rod (6b) and a guide rail (not shown) provided on the upper surface of the fixed support member (7). A movable coupling head support member (
8), and its cylinder portion (9a) is fixed to the rear end of the fixed support member (7), and the tip of the piston rod (9a) is connected to the rear end of the movable support member (8). The third fluid pressure cylinder device, for example, an air cylinder device (9). In (10), air is introduced into the rear air chamber of the third air cylinder device (9), and the coupling head (A) fixed on the movable support member (8) is connected to the box-shaped workpiece. (W) is provided between the fixed support member (7) and the movable support member (8) in order to absorb the impact at the end of the forward stroke when moving forward toward the joining position. The first shock absorber shown in FIG. Similarly, in (11), when air is introduced into the front air chamber of the third air cylinder device (9) and the joining head (A) that has completed the upsetting joining operation is retreated, at the end of the backward stroke. To absorb shock,
A second shock absorber provided between the fixed support member (7) and the movable support member (8) is shown. The workpiece positioning means (IV) is a box-shaped workpiece, such as a fan heater duct (W ) at a predetermined position on the side of the coupling head (A).
12b) and a fourth fluid pressure cylinder device, for example, an air cylinder device (13), which drives this holding jig. In the illustrated embodiment, the support plate (2)
A support frame (14) is placed upright above the pallet (15), and a fourth air cylinder device (13) is installed upright on the front end of the support frame (14) extending above the pallet (15), and its piston extends downward. A vertically movable workpiece positioning means (IV) is constructed by fixing plate-shaped holding jigs (12a) (12b) to the tip of the rod (13a) via connecting members (30) (31). ing.

In addition, in FIG. 3, reference number (32) indicates piston rods (13) on both sides of the fourth air cylinder device (13).
Holding jigs (12a) arranged in pairs parallel to a)
) (12b).

Hereinafter, the operating sequence of the coupling device will be explained based on a specific example in which the present invention is applied to coupling fan heater ducts (W).

As shown in FIG. 4, an opening (33) for inserting the yoke;
A fan comprising a plate-shaped bent piece (34) that diagonally covers the upper part of this opening (33), and a flange (35) that supports both ends of this bent piece (34) from below. The heater duct (W) is loaded on the pallet (15) and carried to the caulking connection position.

In this state, air is introduced into the upper air chamber of the air cylinder device (13) of the workpiece positioning means (■), and the movable holding jig (12a) is moved along the guide rod (32) for each piston rod (13a). ) (12b) is lowered. By pressing the outer peripheral wall surface of the fan heater duct (W) with the inner surfaces of the holding jigs (12a and 12b), the fan heater duct (W) is attached to the joining head (A).
Position and fix on the side of the

In this state, by introducing air into the rear air chamber of the first air cylinder device (1), the slope supported on the guide rail (3) of the support plate (2) of the first moving means (I) is The support stand (4) is connected to the third moving means (■), and
Each coupling mechanism (C) is moved horizontally in the direction indicated by the reference number ■. This horizontal movement causes the coupling mechanism (C) to complete its downward movement from the standby position to the starting position of the coupling operation.

After the above horizontal movement is completed, air is introduced into the lower air chamber of the first stage of the air cylinder device (5) of the second moving means (If), and air is introduced into the lower air chamber of the first stage of the air cylinder device (5) of the second moving means (If). 3. The moving means (■) and the coupling mechanism (C) are shown in Figure 1.
Move it diagonally upward by one step as shown in the direction of movement. At the point when this first step of diagonally upward upward movement begins, the die (17) of the joining head (A) is in the box-shaped workpiece (
The welding target parts (36a) (36b) of the box-shaped workpiece (W) are located outside the yoke insertion opening (33) of the box-shaped workpiece (W) between the punch (16) and the die (17).
or not entered. That is, the punch (16) and die (1
7) are arranged on the same axis at a predetermined interval without intervening the part to be joined. On the other hand, at the end of the first stage upward movement, the overlapping flanges (35a) (3
5b) and the flat bent piece (34) are punched (16
) and the die (17).

As a result, the parts to be joined (36a) (36b)
Alternatively, the punch (16) and die (17) are aligned on the same axis.

In this state, the air cylinder device (9) of the third moving means (m)
), and move the coupling head (A) to the movable support member (8) as indicated by the reference number ■ in Figure 1.
each time, it is moved diagonally upward, that is, in a direction approaching the box-shaped workpiece (W). As a result, the upper surface of the die (17) is the welding target part (36a) (36b) of the box-shaped workpiece (W).
The punch (16) comes into contact with the lower surface of the punch (16), and the preparation operation for forward pushing of the punch (16) is completed.

Next, the power actuator (2) of the coupling head (A)
0) and executes the upsetting joining operation.

That is, air is introduced into the punch advance side air chamber (23a) of the power actuator (20), and the toggle link (26)
, the ram (21), the holder (18), the stripper holder (28), the spring (29), and the punch (16) via the stripper (27) as shown by the arrow (F) in FIG.
) transmits the forward stroke indicated by The punch (16) approaches the die (17), but the corresponding punch (
16) and the die (17) are the part to be joined (36a)
(36b), in the first half of the forward stroke, the bent piece (34) and the flange (35a
) (35b) is pushed into the die hole (17g) by the punch (16) while being plastically deformed into a cylindrical shape, and in the latter half of the forward stroke, the welding area (36a) deformed into a cylindrical shape. (36b) comes into contact with the upper surface of the upsetting pedestal member (17e) and is compressed between the upsetting pedestal member (17c) and the punch (16), thereby causing the parts to be joined (36a) (36b ) bulges outward in the radial direction of the die hole (17g). At this time, the die hole forming members (17a) (17b) expand against the closing force of the spring (17f), and by making the above expansion possible, the bent piece (34) and the flange (35a) are expanded. ) (35b), there is a caulked joint (
a) is formed.

When the upsetting crimping operation for the lower parts to be welded (36a) (36b) is completed, air is introduced into the punch retreat side air chamber (23b) of the power actuator (20), and the upsetting is performed in the opposite direction to the upsetting. Toggle link that moves to (2)
, 6), transmits the backward stroke to the punch (16) via the ram (21), holder (18), stopper holder (28), spring (29), and stripper (27). As a result, punch (16) and die (17)
The state of meshing engagement with is released.

In this state, the air flow path of the third moving means (II[) is switched, air is introduced into the rear air chamber of the third air cylinder device (9), and the coupling head (A) is moved to the movable support member (8). ), move it diagonally downward (in the opposite direction to reference number ■). As a result, the upper surface of the die (17) separates from the lower surface of the welding target parts (36a) (36b) below the box-shaped workpiece (W), and the joining head (A) and the third moving means (III
) are the upper welding target parts (37a) (37b
) to complete preparations for the ascent.

In this state, the air cylinder device (
5) Air is introduced into the lower air chamber of the second stage, and the third moving means (■) and the coupling mechanism (C) are moved to the second stage by one more stage as shown by the reference number ■ in Figure 1. direction, that is, diagonally upward.

Next, the air flow path of the third moving means (III) is switched again, air is introduced into the front air chamber of the air cylinder device (9), and the connecting head (A) is moved as shown by the reference number ■ in FIG.
The movable supporting member (8) is moved obliquely upward, that is, in the direction approaching the box-shaped workpiece (W). Dai (17
) or the welding target area (3) above the box-shaped workpiece (W).
7a) Restart the power actuator (20) while in contact with the lower surface of (37b), and connect the upper welding target parts (37a) (37b) to the lower welding target parts (36a) (36b). Repeat the same upsetting and caulking operation as above.

After the above caulking joining operation is completed, the joining mechanism (C),
The first moving means (I), the second moving means (II), the third moving means (■), and the workpiece positioning means (TV) are reversely activated in the reverse order to the above, and each is returned to its original position. As a result, the parts to be welded (36a) (36b) (37a) (37b) for the box-shaped workpiece (W)
The joining operation ends.

[Effects of the Invention] According to the present invention, a joining structure having mechanical strength close to that of spot welding can be formed at a joining target portion of a box-shaped workpiece, for example, a duct for a fan heater. In addition, by using the device of the present invention, operations such as drilling holes, forming thread grooves, and subsequent painting, which are required for connections using rivets and screws, are no longer necessary, resulting in labor savings and work efficiency improvements. However, a great effect can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a side view of the device of the present invention, Fig. 2 is a top view thereof, Fig. 3 is a front view thereof, Fig. 4 is a perspective view showing an example of a box-shaped work piece, and Fig. 5 is a view of a joining head. Partially broken side view, No. 6
The figure is a side view showing an example of a punch, FIG. 7 is a plan view showing the shape of the tip of the punch, FIG. 8 is a plan view of a die used in combination with the punch shown in FIG. 6, and FIG. FIG. 10 is a side view of the die shown in the figure, and FIG. 10 is an enlarged sectional view of the workpiece joining portion by the punch and die. (W)...Box-shaped workpiece, (20)...Power actuator, (16)...
punch, (17)...die, (22)...yoke, (A)...coupling head, (C)...coupling mechanism, (1)...first fluid pressure cylinder device, (2)...
Support plate, (I)...first moving means, (3)...
・Guide rail, (4)... Inclined support base, (5)... Second fluid pressure cylinder device, (6)...
Upright guide member, (n)...Second moving means, (7)...Fixed support member, (8)...Movable coupling head support member, (9)...
・Third fluid pressure cylinder device, (ffl)...Third moving means, (12)...Movable holding jig, Patent applicant: Sanyo Kiko Co., Ltd. Agent: Shogo Ehara °・
- Figure 3 Figure 7 16a0 Figure 10 V

Claims (1)

[Claims] (1) A punch that sequentially upsets and caulks multiple parts of a box-shaped workpiece to be joined, a power actuator provided as a drive source for the die, and a punch attached to the tip of the holder part of this power actuator. Then, parallel to each other, two coupling heads consisting of a die are attached to the tip of a yoke protruding from the side end of the power actuator body that supports the ram portion of the holder, with the axes aligned with the punch. , and a workpiece positioning means comprising a coupling mechanism arranged in a line symmetrical manner, a movable holding jig for fixing and supporting the box-shaped workpiece at a caulking coupling position, and a drive device for this holding jig. A device for joining box-shaped workpieces, characterized in that it is comprised of: