JPS6360021A - Bending machine - Google Patents

Abstract

PURPOSE:To facilitate manufacture and operation of a machine by setting the rocking center of a work pressing ram and a bending ram on the same shaft and alternately and independently rocking both rams. CONSTITUTION:A crankshaft 19 rocking a work pressing ram 9 is installed between a support member 15 of the ram 9 and a lower frame 3 through plural crankshaft holders. An eccentric part 45 formed on the crankshaft 19 is provided with a bending ram 49 through plural bending arms 47. a work W is put on a lower die and is clamped between the upper and lower dies by turning the crankshaft 19 after selection of a normal or a reverse bending. Then, bending work is performed by actuation of the bending arms 47 by cylinders 61, 65. The manufacture and operation of a machine are facilitated because of the mechanism by which both the ram 9 and the rams 49 making the crankshaft 19 the moving center and are independently actuated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a bending machine, and more particularly to a bending machine in which a work holding ram that presses a work and a bending ram that bends a work are swing type. .

(Technical Background of the Invention M J3 and its Problems) Conventionally, various types of folding machines for folding workpieces have been known. Among the various types of folding machines, there are two types: one for folding a workpiece upward (hereinafter referred to as "normal bending"), and one for folding a workpiece downward (hereinafter referred to as "normal bending").
Hereinafter, it is called a reverse song. ) Swing type folding machines are well known and in use.

In this swing type bending machine, for example, twelve workpieces are placed on a bottom die, and the workpieces are pressurized and clamped by a top die provided at the lower part of a workpiece holding ram. This work holding ram is generally moved in the vertical direction. Therefore, a ram guide is required,
The problem is that accurate bending cannot be done without a ram guide. In addition, when the work holding ram is of the swing type, the bending ram is provided separately (2), which is very troublesome in terms of operation and production. Ta.

(Objective of the Invention) The object of the present invention was devised in order to improve the problem in view of JI circumstances, and by arranging the rocking centers of the work holding ram and the bending ram on the same axis, It is an object of the present invention to provide a bending machine which is easy to manufacture, can be made into a two-in-one impact machine, and is easy to handle in operation.

(Structure of the Invention) In order to achieve the above object, the present invention provides -
A workpiece is placed on the lower mold provided in section F, and the upper mold provided at the bottom of the work holding ram, which is provided in the lower frame and can be moved up and down in the vertical direction, approaches and moves away from the lower mold to hold the workpiece. A bending machine that is configured to be freely clampable, and to perform normal bending or reverse bending on a workpiece clamped between the lower die and the second die using a bending ram that can freely swing in the vertical direction. The pivoting centers of the work holding ram and the bending ram are arranged on the same axis, so that the work holding ram and the bending ram are oscillated independently of each other.

(Embodiments of the Invention) Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

Refer to FIGS. 1, 2, and 3. At 16, a lower die 7 is attached to and detached from the lower frame 3 of the swing type folding machine 1 via a lower die holder 5 in the left-right direction in FIG. It can be freely extended and installed.

A freely swingable one-nork presser ram 9 is provided above the lower frame 3. At the bottom of this work holding ram 9, )! 'S'! An upper die 13 is provided extending in the left direction of J3 in FIG. 1 so as to correspond to the lower die 7 via the holder 1'1.

Then, a workpiece such as a plate material ~・V
At the loading iRL, the upper mold 13 is lowered by the swingable work holding ram 9, and the work W is clamped by pressing against the lower mold 7.

A workpiece presser ram 9 is provided on the rear side of the workpiece presser ram 9.
A plurality of support plates 15 are integrally provided, and each support plate 15 is integrated with a mounting plate 17 extending in the left-right direction in FIG. 2 on the rear side.

Between the support member 15 of the workpiece presser ram 9 and the lower frame 3, a crank r419 for making the workpiece presser ram 9 swingable is provided with a plurality of crankshaft pressers 21 as shown in FIGS. 4J3 and 5. and 23. More specifically, as shown in FIG. 4 J3 and FIG. 5, a plurality of crankshaft holders 21 are attached to the upper part of the lower frame 3 via a plate 25.

On the other hand, a plurality of crankshaft pressers 23 are attached to the lower part of the support member 15 of the workpiece presser ram 9 via a plate 27. A plurality of crankshaft holders 21 and 23 are fitted onto the crank@19 to support the crankshaft 19.

As shown in FIG. 2, a plurality of brackets 29 are provided on the mounting plate 17 attached to the cloth part in FIG. 3 at the rear of the plurality of support members 15 integrated on the rear side of the work holding ram 9. One main clamp cylinder 33 and a plurality of sub-clamp cylinders 35 as a clamping device are attached to these two plurality of brackets by means of respective bins 31.

Each main clamp cylinder 33. A rod 37 is attached to the lower part of the subclamp cylinder 35, as shown in FIG.
9 is the setting. On the other hand, a bracket 41 is attached to the rear end side of the lower frame 3, and is attached to the lower part of the rod 37 (=j).
1 is pivotally supported by a pin 43, and with the pin 43 as a fulcrum, the handle member 39 can rotate to the right h17+] as shown by the arrow in FIG.

With the above configuration, when the main clamp cylinder 33 and the plurality of sub-clamp cylinders 35 are operated, the rod 37 moves upward 8! L. As the rod 37 moves upward, it is rotated to the left in FIG. 3 about the bin 43 as a fulcrum. The work holding ram 9 swings around one crankshaft from the position indicated by the two-dot chain line, swings to the position shown by the solid line shown in FIG. The W is clamped and held by the upper die 13 provided at the lower part of the work holding ram 9.

Therefore, the work holding ram 9 is swingably pivoted about the crankshaft 19.

As shown in FIGS. 3 to 5, the crank I
An eccentric part 45 is disposed coaxially with M19 and eccentric to the axis of the crankshaft 19, and a bending ram 49 is provided on the eccentric part 45 via a plurality of bending arms 47.

At the tip of the bending ram 49, as shown in FIG.
A and 51B are removably attached. Bending push member 5
1A bends the work W into a normal bend, and a bending pushing member 51B bends the work W into a reverse bend.

With the above configuration, the pivoting centers of the work holding rams and the bending rams 49 are arranged on the same axis, and the work holding rams and the bending rams 49 are oscillated independently of each other, which facilitates production. This makes it more compact and easier to handle than before.

As shown in FIGS. 1 to 3, the bending selector is a drive adjustment device that selects normal bending or reverse bending for the workpiece W and allows the eccentric portion 45 on which the bending ram 49 swings to be freely adjusted. A cylinder 53 is provided on one side of the lower frame 3, for example, at the upper center of the right side in FIG.

In order to freely adjust the eccentric position of the eccentric part 45 for swinging the bending ram 49 upward or downward by the bending select cylinder 53, the encoder 55, which is a rotation detection device for detecting the rotation of the crankshaft 19, rotates the bracket 57. It is provided on one side of the lower frame 3 through the opening. That is, FIGS. 1 and 2.

On the left side of FIGS. 4 and 5, a bracket 57 is attached to the left side of the crank holder 21, which is attached to the lower frame 3 via a mounting plate 27. An encoder 55 is attached to the bracket 57 so as to correspond to the axis of the crankshaft 19, and detects the rotation of the crankshaft 19.

By detecting the rotation of the crankshaft 19, the eccentric portion 4 swings the bending ram 49 during forward or reverse bending.
The eccentric position of No. 5 can be adjusted freely.

With the above configuration, a bending select cylinder 53 is provided on one side of the lower frame 3 as a drive adjustment device that selects normal bending or reverse bending and can freely adjust the eccentric position of the eccentric portion 45 in which the bending ram 49 moves. Due to this,
The bent portion of the workpiece W can be accurately bent at right angles, and the position of the bending ram 49 can be adjusted in the front and rear directions in response to changes in the thickness of the workpiece W.

In addition, as shown in FIGS. 2 and 3, a bending device (details of which will be described later) is attached to the lower part of the lower frame 3 extending from the rear center to the right side through a bracket 59. One end of the bending cylinder 61 is attached.

The other end of this bending cylinder 61 is attached to a bending adjustment arm 63, and the bending adjustment arm 63 is shown in FIGS.
As shown in the figure, the bending adjustment arm 63 is fitted into the crank @19, and the tip of the bending adjustment arm 63 is attached to the bending ram 49.

As shown in FIGS. 2 and 3, each bending arm 47 is attached with one end of a bending pressure cylinder 65 as a bending device whose details will be described later. The other end of the pressurizing cylinder 65 is attached to the lower part of the rear part of the lower frame 3 via a bracket 67.

Further, in order to overbend the workpiece W after normal bending or reverse bending, a bending correction cylinder 69 as a bending correction device is provided as shown in FIGS.
As shown in the figure, the bending correction arm 7 is attached to the crankshaft 19.
It is installed via 1.

With the above configuration, the bent portion of the work W can be accurately and easily formed by bending the bent portion of the work W into a normal bend or a reverse bend, and by roughly overbending the bent portion of the work W.

As shown in FIG. 1, a lower die 7 is provided on the lower frame 3 via a lower boulder 5, whereas an upper die 13 is provided on the lower part of the work holding ram 9 via an upper holder 11. is lowered by one movement of the work holding ram 9, and the lower die 7
Crumble the work W placed on top. In order to determine the reference position of the upper mold 13 with respect to the lower mold 7 when the work W placed on the lower mold 7 is clamped by the upper mold 13, the upper part of the lower frame 3 on both sides of the lower mold 7 is shown in FIG. A lower stopper 73 is provided at each.

On the other hand, in FIG. 1, upper stoppers 75 are provided at the lower part of the upper mold holder 13 on both sides of the upper mold 13, respectively, and are provided with corresponding dimensions to the lower stoppers 73. As the workpiece holding ram 9 descends, the upper stopper 75 comes into contact with the lower stopper 73, and reference alignment for forward or reverse bending is performed.

Place the workpiece W on the lower die 7! i? ! t, Work holding ram 9
When the upper mold 13 is lowered and the workpiece W is clamped by the swinging motion of
．． ! If the standard J9 size is too thick, a gap may occur between f, t, the rear part of the upper die 13 and the workpiece V, and the workpiece W may not be clamped almost completely.

In order to avoid this incomplete or ramped state, a height position adjustment device is provided which allows the height position of the lower mold 7 to be freely adjusted according to changes in the thickness of the workpiece W, for example, changes in the thickness of the plate material. As shown in FIGS. 1, 2 and 3, 77 is provided on the front side of the two-sided portion of the lower frame 3. Note that this height position adjusting device 77 may be provided on the "-" mold holder 11 to adjust the height position of the "G" mold 13.

By adopting the above configuration, a height position adjustment device 77 is provided on the front side of the lower frame 3, which allows the height position of the lower die 7 to be freely adjusted according to changes in the thickness of the workpiece W. The movable work holding ram 9 does not require a ram guide, and the height position of the lower mold 7 can be easily adjusted according to changes in the thickness of the work W, allowing accurate bending. .

To briefly explain the processing order in this embodiment, a workpiece W is placed on a lower mold 7 provided at the upper part of the lower frame 3. In this state, the bending select cylinder 5 provided on the right side of the lower frame 3, for example in FIG.
3, select normal bending or reverse bending, and in the case of normal bending, by rotating the crankshaft 19 clockwise, the eccentric position of the eccentric portion 45 is set in the predetermined clockwise direction in FIG. is rotated to a position above. In the case of reverse bending, by rotating one crankshaft counterclockwise, the eccentric position of the eccentric portion 45 is rotated counterclockwise around S1 in FIG. 3 to a predetermined lower position.

Next, the support member 1 provided at the rear of the work holding ram 9
5, the main clamp cylinder 33 and a plurality of sub-clamp cylinders 35 provided on the lower die frame 3 are actuated to swing the work holding ram 9 about the crankshaft 19 as a central axis and lower the workpiece. W to lower mold 7
and the upper die 13 and held under pressure. In the case of normal bending, the bending cylinder 61 provided at the rear lower part of the lower frame 3 is actuated to move the bending ram 49 through the bending arm 47 as an eccentric center axis of the center part 45 at a time 81.
Rotate around the direction. In the case of reverse bending, the bending cylinder 61 is operated to rotate the four bending rams counterclockwise via the bending arm 47 with the eccentric position of the neck portion 45 as the central axis.

Note that a plurality of bending pressure cylinders 65 provided at the lower part of the rear part of the lower frame 3 are connected to the bending cylinders 61.
The bending cylinder 61 operates in synchronization with the bending cylinder 61 to bend the workpiece W by the bending pushing members 51Δ and 51B which are freely provided at the tip of the bending ram 49 in the forward or reverse direction. Further, the workpiece W is pressurized by the bending pressure cylinder 65 and bent almost completely.

Further, six bending correction cylinders provided at the rear of the lower frame 3 are operated to overbend the workpiece W so that the workpiece W is uniformly and almost completely bent at a right angle. As a result, the workpiece W has been subjected to normal bending or reverse bending in which uniform bent portions are formed.

In addition, before performing the bending process, the height position of the lower die is adjusted in advance using a height position adjustment device 77 provided on the front side of the upper part of the lower frame 3 according to changes in the thickness of the workpiece W, for example, the plate material. Of course you should.

The bending select cylinder 53 as the drive adjustment device described above is provided on one side of the lower frame 3, for example, on the right side in FIG. More specifically, as shown in FIGS. 6 and 7, a gearbox 79 is mounted on the side of the lower frame 3. An inclined support member 81 is fixed to the lower part of the gear box 79 with a plurality of bolts 83 or the like. At the top and bottom of the support member 81, there are racks 8
Rack holders 87 and 89 containing 5 are fixed in the longitudinal direction of the support member 81 with a plurality of bolts 91 or the like.

A binion 93 meshed with the rack 85 is rotatably supported by a plurality of bins 95 within seven gear boxes.

The crankshaft 19 is fitted into the axial center of the binion 93, so that it is rotated in the same direction as the binion 93 rotates.

A rod 97 connected to the hook 85 is provided on one end side of the rack holder 87 on the lower side in FIG. 6, and the rear end of the rod 97 projects toward the rear end of the rack holder 87. A part of the rod 97 is provided with an air cylinder 99 for moving the rod 97 in the axial direction.

A rod 101 connected to the rack 85 is provided inside the narrow end of the rack holder 89, and the tip of the rod 101 projects inside the rack holder 89 toward the tip.

the rear end of the rod 97.101 connected to the rack 85;
Stopper members 1 each having approximately the same shape are provided at the front end.
03A and 103B are installation.

The rods 97.101 near the inner side of the stopper members 103A, 103B include the stopper members 103A, 103B.
Absorbing devices 105A and 105B, which have substantially the same shape, are provided to absorb shock when 03B abuts.

The absorption devices 105A and 105B include a piston 107A,
107B is provided, and its absorption devices 105A, 105
B is provided with oil passages 109A and 109B for supplying and removing pressure oil, for example, and the piston 107
It communicates with the piston chamber A and 107B.

According to the above-mentioned operation, the air cylinder 99 is actuated to move the rack 85 in the claw direction in FIG. 6, thereby rotating the binion 93 counterclockwise and selecting one bend. The above-mentioned eccentric part 45 and the eccentric part are set upward from the horizontal position.

By activating the air cylinder 99 and moving the rack 85 in the direction B in FIG. 6, the binion 93 is rotated clockwise to select the reverse orientation, and the eccentric neck of the eccentric part 45 is horizontally rotated. It will be positioned below from the position of .

When the rack 85 moves in the A direction and the B direction, the rack 85
The rods 97 and 101 connected to the direction B and B
direction, and comes into contact with the stopper members 103A, 1031@accommodating devices 105A, 105B. absorption device 105A,
Hydraulic pressure is previously supplied to oil passages 109A and 109B in 105B to move pistons 107A and 107B toward stopper members 103A and 103B, respectively.

The stopper members 103A and 103B are the absorption device 105A,
When it comes into contact with 105B, the absorber H105△, 105
B pistons 107A and 107B are stopper members 103
A, move to the opposite side of 103B and stopper member 103A
, 103B will be absorbed.

One end of a bending cylinder 61 serving as a bending device is attached to a lower portion of the lower frame 3 on the right side from the rear center thereof via a bracket 59. More specifically, as shown in Figure M8, a bracket 59 is fixed to the lower part of the lower frame 3 on the right S side from the rear center with a plurality of screws 111 or the like.

A pin 113 is provided at the lower rear end of the bracket 59.
The member 115 is the recess. One end of the rod 11a is attached to the upper end of the attachment member 115, and the other end of the rod 117 is attached to one end of the bending cylinder 61, for example, an air cylinder at position 3. At the other end of the bending cylinder 61, one end of the rod 119 is attached. rod 11
The other end of 9 is attached to the lower part of the attachment member 121.

On the right side of the rear side of the bending cylinder 61 in FIG. 8, the upper and lower ends of a guide bar 123 extending vertically in the longitudinal direction of the bending cylinder 61 in FIG.
．． It is inserted into the rear protrusion of 121. Moreover, at a position substantially in the middle of the guide bar 123, the bending cylinder 61 is held down by the holding member 125.

At the upper end of the mounting member 121, one end of a bending adjustment arm 63 extending in the left-right direction in FIG. 8 is pivotally supported by a pin 127. The other end of the bending adjustment arm 63 is fixed to one end of the bending arm 47 with a plurality of screws 129. Note that the eccentric portion 45 of the crankshaft 19 is built in between the bending adjustment arm 63 and the bending arm 47.

The other end of the bending arm 47 is fixed to the bending ram 49 with a plurality of bolts 131 or the like. On the front of the bending ram 49,
The bending and pushing members 51△ and 51B described above are removably attached to the vt
It is e-shi.

Moreover, due to the bending select cylinder 53 described above, in the case of normal bending, the eccentric position of the eccentric portion 45 is set to the upper position 4.
5A, in the case of reverse bending, the eccentric position of the eccentric portion 45 is at the lower position 45B1. : Selected and located.

With the above configuration, for example, when the bending cylinder 61, which is the third position air cylinder, is activated and the bending cylinder 61 is moved downward, the bending adjustment arm 63 moves clockwise around the eccentric position 4'5A of the eccentric part 45. The bending ram 49 rotates slightly around the direction, and the bending ram 49 moves to the eccentric part 4 via the bending arm 47.
It rotates clockwise around the eccentric position 45Δ of No. 5. As a result, the bending pushing member 51A attached to the front of the bending ram 49 rotates slightly clockwise, and the workpiece W cannot be bent in the normal direction.

On the other hand, the bending cylinder 61 is operated and the bending cylinder 61
When the bending adjustment arm 63 is moved upward, the bending adjustment arm 63
The bending ram 49 rotates counterclockwise around the eccentric position 45B of the eccentric portion 45 via the bending arm 47.

Thus, the bending push member 51B attached to the front of the bending ram 49 rotates slightly counterclockwise, and the workpiece W is reversely bent.

Note that bending pressure during normal bending or reverse bending is performed by a bending pressure cylinder 65, which will be described later.

The bending pressure cylinder 65 as the bending device described above is provided at the lower part of the rear part of the lower frame 3 via a bracket 67. More specifically, as shown in FIG. 9, one end of the bending pressure cylinder 65 is fixed with a pin 133 to the upper end of a bracket 67 attached to the lower part of the rear part of the lower frame 3. . A rod 135 is attached to the other end of the bending pressure cylinder 65 so as to be expandable and retractable in the axial direction. The tip of the rod 135 is attached to one end of the member 137 and fixed with a bolt 139 or the like.

A bottle 141 is inserted into the other end of the mounting member 137 and the rear end portion 47A extending downwardly of the bending arm 47,
It is fixed with a set screw 143 or the like. An eccentric portion 45 of the crankshaft 19 is supported in the bending arm 47 . Four bending rams are attached to the left side of the tip of the bending arm 47 as shown in FIG. 9 with a plurality of bolts 131 as described in FIG. At the left side of the tip of the bending ram 49 in FIG. 9, bending and pushing members 51A and 51B are detachably provided.

With the above configuration, by operating the bending pressure cylinder 65 and pushing up the rod 135 to the upper left in FIG.
(see Fig. 8) in the clockwise direction. As a result, the bending pushing member 51Δ mounted in front of the first bending ram 49 also rotates clockwise, bending the workpiece W into a normal bending direction and applying pressure.

On the other hand, the bending pressure cylinder 65 is operated, and the rod 135
By pushing down to the lower right in FIG. 9, the bending arm 47 rotates counterclockwise around the eccentric position 45B of the eccentric portion 45 (see FIG. 8). the result,
A bending pushing member 51 [3] attached to the front of the bending ram 49
The workpiece W is also rotated counterclockwise to bend the workpiece W in the opposite direction and to be pressurized.

A bending correction cylinder 69 as a bending correction device for overbending the workpiece W after normal bending or reverse bending is attached to the crankshaft 19 via a bending correction arm 71. More specifically, as shown in FIG. 10, a rod 145 protrudes from one end of the bending correction cylinder 69 to the left in FIG.
is attached to a mounting member 147 with a set screw 149 or the like. The attachment member 147 is fixed to the bending correction arm 71 with a pin 151. The crankshaft 19 and the eccentric portion 45 of the crankshaft 19 are built into the bending correction arm 71 .

On the other hand, a rod 145 protrudes from the other end of the six bending correction cylinders on the right side in FIG. 10, and a stopper member 153 is provided at the right end thereof. An absorbing device 155 is provided near the inner side of the stopper member 153 of the rod 145 for absorbing shock when the stopper member 153 comes into contact with the rod 145.
is the provision.

The absorption device 155 is provided with a piston 157, and an oil passage 159 communicating with the piston 157 is provided within the absorption device 155. A spring is interposed in the screw chamber in which the piston 157 is provided.

A bracket 163 is attached to the tip of the bending correction cylinder 69 via a pin 161, and the lower part of the bracket 163 is attached to the lower frame 3 with a plurality of bolts or the like.

With the above configuration, when the six bending correction cylinders are operated and the rod 145 moves to the left in FIG. 10, the four bending rams are pushed to the left via the bending correction arm 71. When the four bending rams are pushed to the left, the bending rams 4
The bending presses mounted in front of the two press members 51A and 51B are pressed to the left, causing the workpiece W to overbend the bent part bent by the bending pressure cylinder 65 described above, and make the bent part uniformly at right angles. Let it form.

Note that when the bending correction cylinder 69 operates, the 10th
In the figure, by selecting the bending select cylinder 53, 2
As shown by the dashed dotted line, the eccentric position of the eccentric portion 45 is at position 45A for normal bending and at position 45B for reverse bending, respectively.

45B to position 45 by actuation of the bending correction cylinder 69.
It will be pushed by C and 45D and overbended.

Furthermore, when the rod 145 moves to the left in FIG. Since the piston 157 is pressed toward the stopper member 153, the piston 157 moves slightly to the left to soften the shock of the stopper member 155.

Another embodiment of the bending correction cylinder 69 is shown in FIG. The bending correction cylinder 69 in FIG. 11 is different from that in FIG.
1 is provided with a cylinder (not shown) for moving the rod 145 to the left in FIG. Since the operation is almost the same as that shown in the figure, a detailed explanation of the operation will be omitted.

When placing the workpiece W on the lower die 7 and lowering the upper die 13 by swinging the workpiece holding ram 9 to clamp the workpiece W, the thickness of the workpiece W, e.g. A height position adjustment device 77 is provided on the front side of the upper part of the lower frame 3, which allows the height position of the lower die 7 to be adjusted freely according to changes in the thickness of the plate material. More specifically, as shown in FIGS. 1, 2, 3, 12 and 13, the drive unit 165 of the height position adjustment device 77 is provided on the front side of the upper part of the lower frame 3. There are a plurality of numbers, for example, three. As shown in FIGS. 1 and 2, each driving section 165 is connected by a connecting member 167.

The connecting member 1 is located on the left side in FIG.
A pulley 169 is fitted on the pulley 67, and a
The belt 171 rotates one trigram. A drive motor 173 is provided on the lower frame 3 at the lower part of the drive section 165 provided at the front center portion.

A pulley 175 is attached to the left side of the drive motor 173 in FIG. 1 via the output shaft of the drive motor 173. The bell 1-171 is hung around this pulley 175. When the drive motor 173 is driven, the pulley 175. The central driving section 165 is driven via the belt 171 and pulley 169, and the other two driving sections 165 are also driven via the connecting member 167, so that the height position of the lower die 7 is adjusted up and down. That will happen.

To explain the specific structure of the drive unit 165, in FIG.
It is fixed. A hole 177 is bored in the upper part of the lower frame 3 in the 12th position in the front and back in the left-right direction in the figure.

A shaft 179 is mounted in this hole 177 so as to be rotatable in the left and right directions in FIG. An opening 181 that gradually opens toward the upper right is formed in the lower frame 3 on the right side in FIG. 12 behind the hole 177. This opening 181 is fitted with a wedge member 183 which is screwed into the male threaded portion on the right side in FIG. 12 of the rear portion of the shaft 179 through its female threaded portion.

In front of the shaft 179 and to the left in FIG.
A support member 187 is provided via a bearing 185. Further, on the left side of the support member 187 in FIG.
A body 189 of the drive unit 165 is fixed with a plurality of bolts 191 and the like.

A shaft 179 and a gear 193 are fitted inside the 18 bodies. This gear 193 includes a gear 19
5 are in mesh with each other, and the gear 195 is connected to the pulley 169.
It is installed coaxially with the shaft of

With the above configuration, the rotation of the pulley 169 causes the gear 1 to
When the shaft 95 is rotated, the shaft 17 is rotated through the gear 193.
9 is rotated. When the shaft 179 rotates, for example, clockwise, the wedge member 183, which is screwed into the male threaded portion of the rear portion of the shaft 179 by the female threaded portion, moves to the right in FIG.

When the wedge member 183 moves to the right in FIG. 12, the upper frame 3A of the lower frame 3 moves downward along the tapered surface of the wedge member 183.

If the above operation is performed in reverse, the upper frame 3A of the lower frame 3 will be lifted upward along the tapered surface of the wedge member 183. Therefore, the lower frame 3 moves up and down in response to changes in the thickness of the workpiece W, for example, the thickness of the plate material. That is, the height position of the lower die 7 is adjusted according to the change in the thickness of the plate material.

As shown in FIG. 13, both sides of the drive unit 165 provided on both sides of the lower frame 3 are connected to the bin 1 via a wedge member 183 between the upper frame 3A and the lower frame 3B.
97 is provided, and this bottle 197 has a spring 19
9 is without intervention.

As the wedge member 183 moves, the spring 199
The upper frame 3A is lowered against the urging force of the spring 199, and the upper frame 3A is lowered by the urging force of the spring 199.

Lower stopper 7 for reference alignment of the lower mold 7 and upper mold 13 mentioned above
3, the lower part of the upper stopper 75 has a spherical seat 75A, as shown in FIG. 14, to facilitate reference alignment in the front, rear, left and right directions.

The operation in this embodiment will be explained based on the flowchart shown in FIG.

In FIG. 15, the bending correction cylinder 69 is moved backward at the 0th stage. At the 0th stage, it is determined whether or not it is a normal bend. In the case of normal bending, the bending select cylinder 53 is turned ON for normal bending at the 0th stage. For reverse bending, the bending select cylinder 53 is turned on for reverse bending at the 0th stage. Proceeding to the 0th stage, the work holding ram 9 is lowered by the main clamp cylinder 33, and at the 0th stage, the plurality of sub-clamp cylinders 35 are operated to pressurize the work holding ram 9, and the work holding ram 9 is placed on the lower mold 7 by 111!
The placed workpiece W is clamped by the upper die 13.

At the 0th stage, it is determined whether or not it is normal bending, and if it is a normal bending process, the bending cylinder 61 is turned on at the 0th stage to allow the bending ram 49 to reach its upper limit, and then the bending pressure cylinder 65 is turned on at the 0th stage.
Normal bending is performed with an upper limit of .

If it is determined that reverse bending is to be performed at the 0th stage, the process proceeds to the 0th stage and the bending cylinder 61 is turned on to lower the bending ram 49. Then, at the 0th stage, the bending pressure cylinder 65 is turned on and the bending ram 49 is lowered. A reverse bend is performed.

At the 0th stage, the bending correction cylinder 69 and the bending selection cylinder 53 are temporarily turned off.

Next, at the 0th stage, the bending correction cylinder 69 is turned on and operated to perform overbending. When overbending is completed, it is determined whether or not it was a normal bend at the 0th stage, and if it was a normal bending process, the bending pressure cylinder 65 is turned OFF at the 0th stage, and the bending cylinder 61 is turned ON at the 0th stage. and lower the bending ram 49. In the case of reverse bending, the bending pressure cylinder 65 is turned off at the 0th stage, and the bending cylinder 61 is turned on at the 0th stage to raise the bending ram 49.

The nub clamp cylinder 35 is turned OFF at the stage ①, and the main clamp cylinder 33 is operated at the 0th stage to raise the work holding ram 9. At the 0th stage, it is determined whether there is a next bending process, and if there is a next bending process, it is fed back before the 0th stage. If there is no next bending process, the process ends.

If the above-mentioned operations are performed in the wrong order, machine interference may occur or the product may not be produced properly.

Note that the present invention is not limited to the above-mentioned embodiments,
It can be implemented in other ways by making appropriate changes.

(Effects of the Invention) As can be understood from the description of the embodiments above, according to the present invention, the swing centers of the work holding ram and the bending ram are arranged on the same axis, and the work holding ram and the bending ram are arranged on the same axis. By providing the parts so that they can be swung independently from each other, manufacturing becomes easier and more compact, and the handling becomes easier than in the past.

[Brief explanation of the drawing]

FIG. 1 is a front view of a swing type folding machine according to an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a right side view of FIG. 1. 4 is a sectional view taken along the line IV--IV in FIG. 3, and FIG. 5 is a plan view of FIG. 4. FIG. 6 is an enlarged view of the part in the direction of the arrow ■ in FIG. 3, and FIG. 7 is a view in the direction of the Vt arrow in FIG. Figure 8 is an enlarged view of the part shown by arrow ■ in Figure 3, Figure 9 is an enlarged view of the part seen by arrow IX in Figure 3, and Figure 10 is an enlarged view of the part shown by arrow 3 in Figure 3.
The enlarged view of the X-arrow section in the figure and Figure 11 are
It is an enlarged view of another Example instead of a figure. Fig. 12 is an enlarged sectional view taken along the x-xn line in Fig. 1, and Fig. 13 is an
The enlarged cross-sectional view along X in FIG. 1 and FIG.
It is an enlarged sectional view along the IV-X IV line. FIG. 15 is a flowchart explaining the operation of this embodiment. [Explanation of symbols representing main parts of the drawing] 1... Swing type bending machine 7... Lower mold 9... Work holding ram 13
...Upper mold 19...Crankshaft 33...
Main clamp cylinder 35...Nub clamp cylinder 45...Eccentric @ 49...Bending ram 51A,
51B...Bending push member 53...Bending selection cylinder 61...Bending cylinder 65...Bending pressure cylinder 69...Bending correction cylinder 77...Height position adjustment device Fig. 13 Fig. 14 Figure 5

Claims (2)

[Claims] (1) A workpiece is placed on a lower mold provided at the upper part of the lower frame, and the upper mold provided at the lower part of the work holding ram which is swingable in the vertical direction provided on the lower frame is the lower mold. A bending method in which a workpiece is freely clamped by moving toward and away from the lower die and the upper die, and a bending ram that can freely swing in the vertical direction bends the workpiece clamped between the lower die and the upper die. A bending machine characterized in that the swing centers of the work holding ram and the bending ram are arranged on the same axis, and the work holding ram and the bending ram are oscillated independently of each other. machine (2) The bending machine according to claim 1, characterized in that the bending ram is supported on an eccentric portion having the same axis.