JP2000051968A - Method for pressing plate in plate working machine and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely press a work of thick plate warped upward and to give no damage due to depression, etc., even to a thin plate work. SOLUTION: The work W is laid on lipo-bases 49 positioned at the same height as a pass-line PL or lower and a working table. Lower plate pressing pins 51 freely elevated/lowered in the lipo-bases 49, are projected upward from the pass-line PL with lower plate pressing cylinders 53. On the other hand, the work on the upper surfaces of the lower plate pressing pins 51 is pressed with upper plate pressing pins 47 having larger area than the upper surfaces of the lower plate pushing pins 51 from the upper part through upper plate pressing cylinders 43 having higher pressing force than the lower plate pressing cylinders 53. In the case of the upward warped thick plate, even the work is not warped downward, the lower plate pressing pins 51 are closely attached on the lower surface of the work and the plate pressing is surely executed by interposing together with the upper plate pressing pins 47. Further, in the case of the thin plate work, the work is pressed to the pass-line PL being the reference of the lip-bases 49 with the upper plate pressing pins 47.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for holding a plate in a plate processing machine.

[0002]

2. Description of the Related Art Conventionally, for example, a turret punch press as a plate material processing machine is provided with a plate presser device which is located substantially right and left near a processing position of an upper and lower turret where a punch and a die are mounted. . Since a large-sized workpiece cannot be processed in the entire range by a single clamping with the gripper of the workpiece movement positioning device, it is necessary to change the gripping device. This is used when the gripping position is changed.

As shown in FIGS. 10 and 11, two plate holding cylinders 1 are used as a plate holding device 101. As shown in FIG.
Reference numeral 03 is provided on the upper frame 105, and an upper plate pressing pin 109 for pressing the work W on the work table from above is provided at the lower end of the piston rod 107 of each upper plate pressing cylinder 103.

In FIG. 10, a lipo base 111 having an upper surface substantially at the same height as the pass line PL on the work table is provided on a lower frame 113 below the two upper plate holding pins 109. I have.

In FIG. 11, the lower plate holding cylinder 1 is located below the two upper plate holding pins 109.
15 is provided on the lower frame 113, and a lower plate holding pin 119 is provided at the tip of the piston rod 117 of the lower plate holding cylinder 115. The lower plate holding pin 119 is configured to rise to almost the same height as the pass line PL on the work table and sandwich the upper plate holding pin 109 and the work W.

[0006]

By the way, in the conventional plate material processing machine, in the case of a work W of an upwardly warped thick plate, the piston rod 107 of the upper plate holding cylinder 103 is required.
10 and 11, the work W does not bend even when the work W is pressed by the upper plate holding pin 109. Therefore, in any of the plate holding devices 101 shown in FIGS. Does not adhere to the upper surface of the lipo base 111 or the lower plate holding pin 119, so that the plate cannot be held securely.
There is a problem that the work W is shifted.

[0007] The plate holding device 1 shown in FIG.
In the case 01, if the lower plate holding pin 115 is provided so as to protrude above the pass line PL by extending the stroke of the lower plate holding cylinder 115, the upper plate holding pin 119 is used in the case of an upwardly warped thick work W. Even if the work W does not bend due to the pressing force of the work 109, the lower plate holding pin 119 rises and comes into close contact with the lower surface of the work W and the upper plate holding pin 109.
However, there is a problem in that when the thin work W is pressed, there is no height reference, so that the work W may be damaged such as a depression.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to surely hold a work having an upwardly warped plate thickness and to reduce the work of a thin plate without damaging it by depression or the like. It is an object of the present invention to provide a method and an apparatus for holding a sheet in a sheet processing machine capable of holding the sheet.

[0009]

According to a first aspect of the present invention, there is provided a plate holding method for a plate material processing machine according to the present invention, wherein a work is placed on a lipo base and a work table located at substantially the same height as a pass line. The lower plate holding member that can be placed and lifted in the lipo base is protruded upward from the pass line by the lower plate holding driving means, and the work on the upper surface of the lower plate holding member is moved from above to the upper surface of the lower plate holding member. By pressing the upper plate pressing member having a larger pressing force with the upper plate pressing member having a larger pressing force with the upper plate pressing member having a larger area, the work is performed in cooperation with the lower plate pressing member and the upper plate pressing member. It is characterized in that it is held down in close contact.

Therefore, in the case where the workpiece is an upwardly warped thick plate, the lower workpiece pressing member rises to the lower surface of the workpiece even if the workpiece is pressed from above by the upper workpiece pressing member and does not bend downward, and is securely attached to the workpiece. The plate is brought into close contact with the upper plate holding member above the work, and is reliably held. Also, in the case of a thin work, since the pressing force of the lower plate pressing member is smaller than the pressing force of the upper plate pressing member, the work is lowered while being sandwiched between the upper plate pressing member and the lower plate pressing member, and the work is moved upward. The plate is pressed against the reference pass line of the lipo base by the plate holding member and is reliably pressed.

Since the upper plate pressing member has a larger area than the lower plate pressing member and the lipo base has a larger area than the upper plate pressing member, the work is not easily damaged.

According to a second aspect of the present invention, there is provided a plate holding apparatus in a plate processing machine according to the present invention, wherein an upper plate pressing member for pressing a work on a work table from above is freely moved up and down by an upper plate pressing driving means on an upper frame of the plate processing machine. And a lipo base having an upper surface having substantially the same height as a pass line on the work table is provided on a lower frame of the sheet material processing machine, and a lower plate holding member is located in the lipo base below the upper plate holding member. The lower plate pressing drive means is provided so as to be able to move up and down, and is provided so as to be able to protrude and retract above the pass line, the lower surface of the upper plate pressing member is provided larger than the upper surface of the lower plate pressing member, and the upper plate pressing driving means is provided. The pressing force of the lower plate pressing driving means is provided to be larger than the pressing force.

Therefore, the operation is the same as that of the first aspect, and in the case where the work is an upwardly warped thick plate, the work is pressed from above by the upper plate holding member and the lower plate holding member does not bend downward. Ascending to the lower surface of the workpiece, the workpiece is reliably brought into close contact with the workpiece, and is sandwiched between the upper plate retaining members above the workpiece, thereby reliably performing the panel pressing. Also, in the case of a thin work, since the pressing force of the lower plate pressing member is smaller than the pressing force of the upper plate pressing member, the work is lowered while being sandwiched between the upper plate pressing member and the lower plate pressing member, and the work is moved upward. The plate is pressed against the reference pass line of the lipo base by the plate holding member and is reliably pressed.

The upper plate holding member has a larger area than the lower plate holding member, and the lipo base has a larger area than the upper plate holding member.

According to a third aspect of the present invention, there is provided a plate holding apparatus for a plate processing machine according to the present invention, wherein an upper plate pressing member for pressing a work on a work table from above is movable up and down by an upper plate pressing driving means on an upper frame of the plate processing machine. And a lower plate holding member having an upper surface having substantially the same height as a pass line on the work table is provided on a lower frame of the plate material processing machine, and a lipo base fitted outside the lower plate holding member is provided on the upper plate holding member. A lower plate pressing drive means is provided below the member so as to be movable up and down, and is provided so as to be able to protrude and retract above the pass line. The lower surface of the upper plate pressing member is provided larger than the upper surface of the lower plate pressing member. It is characterized in that the upper plate pressing drive means is provided with a pressing force larger than the lower plate pressing drive means.

Therefore, it is substantially the same as claim 1,
When the work is a thick plate that is warped, the lipo base is raised and securely adheres to the lower surface of the work, and the work is reliably held by sandwiching the work with the upper work holding member. In the case of a thin work, the pressing force of the lipo base is smaller than the pressing force of the upper plate holding member, so that the work descends while being sandwiched between the upper plate holding member and the lipo base, and stops at the pass line where the lipo base becomes the reference. The work is pressed against the lipo base and the lower plate pressing member by the upper plate pressing member and is reliably pressed.

Further, since the area of the upper plate pressing member is larger than that of the lower plate pressing member and the area of the lipo base is larger than that of the upper plate pressing member, the work is not easily damaged.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a method and an apparatus for holding a sheet in a sheet processing machine according to the present invention will be described below with reference to the drawings, taking a turret punch press as an example of a plate processing machine.

Referring to FIG. 3 and FIG. 4, a turret punch press 1 according to the present embodiment
The upper frame 9 has a frame structure in which both sides of the upper frame 9 are supported by side frames 5 and 7 erected on both sides of the upper frame 9. At the lower part of the upper frame 9, a disk-shaped upper turret 11 having various kinds of punches P detachably mounted is rotatably mounted. On the upper surface of the lower frame 3, a lower turret 13 facing the upper turret 11 is rotatably mounted.
A large number of dies D facing various types of punches P are arranged in an arc shape and are detachably mounted. The axis of the upper turret 11 and the axis of the lower turret 13 are arranged on the same axis. The upper turret 11 and the lower turret 13 are provided by an appropriate control device (not shown) such as a numerical control device. By control, it is rotated synchronously in the same direction.

The upper frame 9 is provided with a crankshaft 15, and a striker 17 connected to the crankshaft 15 is hung upward and to the right of the upper turret 11 in FIG. 3. A number of punches P are mounted on the upper turret 11, and a die D corresponding to the number of punches P is mounted on the lower turret 13.

The turret punch press 1 is provided with a work movement positioning device 21 for moving and positioning the plate-like work W placed on the work table 19 in the front-rear and left-right directions. Is gripped by the workpiece W. The work movement positioning device 21 is controlled by a control device (not shown) to move and position the work W to a processing position K between the punch P and the die D of the upper turret 11 and the lower turret 13 below the striker 17. Things.

A work movement positioning device 21 is provided on the right side of the center table 25 on which the work W is placed in FIG. That is, on both sides (up and down in FIG. 4) of the center table 25, side tables 27 each having a Y-axis feed mechanism (not shown) are movably provided on a horizontally installed base (not shown). It rides on the table 25 while being divided into right and left. A carriage base 29 having a length substantially equal to the entire machine width of the turret punch press 1 is fixed to an outer edge of the side table 27.
The work table 19 includes a center table 25 and a side table 27.

By the Y-axis feed mechanism, the side table 27 and the carriage base 29 move in the Y-axis direction, and the work W clamped by the gripping device 23 is positioned in the Y-axis direction.

A guide rail (not shown) made of square steel for moving the carriage is provided below the side of the carriage base 29 facing the turret punch press 1, and the guide rail of the carriage base 29 is provided. A carriage 31 provided with a gripping device 23 is slidably provided in the X-axis direction along the guide rail on the mounting side surface of.

A ball screw 33 provided on the side of the carriage base 29 substantially through the center of the carriage 31 is disposed as shown in FIG. Is done. Ball screw 3
With the rotation of 3, the carriage 31 freely moves in the length direction of the carriage base 29. That is, the ball screw 33,
The transmission mechanism 35 and the geared motor 37 constitute a moving mechanism 39 driven by power, the carriage 31 is moved in the X-axis direction, and the work W is moved and positioned in the X-axis direction.

Therefore, after the plate-shaped work W is positioned between the punch P of the upper and lower turrets 11 and 13 and the die D, the punch P is pressed by the striker 17 so that the punch P and the die Punching is performed on the work W in cooperation with D.

Next, a plate holding device according to a main part of an embodiment of the present invention will be described with reference to the drawings.

As shown in FIGS. 3 and 4, the plate holding device 41 is provided substantially at the left and right near the processing position K of the upper and lower turrets 11, 13. Since the entire range of a large-sized work W cannot be processed by a single clamping by the gripping device 23 of the workpiece movement positioning device 21, it is necessary to change the gripping of the gripping device 23. The plate holding device 41 is used when the gripping position of the workpiece W by the gripping device 23 is changed during the processing of the workpiece W.

Referring to FIG. 1, as the plate holding device 41, for example, two upper plate holding cylinders 43 as upper plate holding driving means are provided on the upper frame 9, and the piston of each upper plate holding cylinder 43 is provided. At the lower end of the rod 45, for example, an upper plate pressing pin 47 as an upper plate pressing member for pressing the work W on the work table 19 from above is provided.

A lipo base 49 having an upper surface almost at the same height as the pass line PL on the work table 19 is provided on the lower frame 3 below the two upper plate pressing pins 47. In each lipo base 49, for example, a lower plate pressing pin 51 as a lower plate pressing member is provided so as to be able to move up and down at a lower position facing the upper plate pressing pin 47, and the lower plate pressing pin 51 serves as a lower plate pressing driving means. For example, the lower plate holding cylinder 53 is provided so as to be able to protrude and retract above the pass line PL.

Referring to FIG. 2, the left side of the center line CL shows the internal structure of the lipo base 49 and the lower plate holding cylinder 53, and the right side of the center line CL shows the piston rod 55 of the lower plate holding cylinder 53 and the lower part. The mounting structure with the plate holding pin 51 is shown.

More specifically, the lipo base 49 is fixed to the lower frame 3, and a lower plate holding pin 51 is provided so as to be able to move up and down in a pin sliding hole 57 provided substantially at the center of the lipo base 49 in the horizontal plane. . A cylinder mounting block 59 is fixed to the lower portion of the lipo base 49 with bolts 61, and a lower plate holding cylinder 53 is fixed to the lower surface of the cylinder mounting block 59 with bolts 63. The upper surface of the lipo base 49 is provided at the position of the pass line PL or at a position about 0.1 to 0.2 mm below the pass line PL.

A mounting shaft 65 is screwed onto the end of the piston rod 55 of the lower plate holding cylinder 53 as shown on the right side of the center line CL in FIG. A pin 51 is screwed so that the height can be adjusted.

The lower plate pressing pin 51 is provided such that the upper surface thereof is projected upward from the pass line PL by an amount corresponding to an assumed amount of warpage of the work W.

The lower surface of the upper plate pressing pin 47 is provided with a larger area than the upper surface of the lower plate pressing pin 51.
The lower surface of the upper plate holding pin 47 is provided with an area smaller than the upper surface of the lipo base 49.

Further, the pressing force of the lower plate pressing cylinder 53 above the lower plate pressing pin 51 is smaller than the pressing force of the upper plate pressing cylinder 43 below the upper plate pressing pin 47.

With the above configuration, when the work W is to be pressed down, when the work W is moved to the plate holding position as shown in FIG. The lower plate holding pin 51 is raised by the operation of the lower plate holding cylinder 53 at the same time as being lowered by the operation, and the work W is sandwiched and fixed between the upper plate holding pin 47 and the lower plate holding pin 51.

When the work W is a thick plate and warped, FIG.
As shown in FIG. 7, even when the work W is hardly bent even when pressed by the upper plate holding pin 47, the lower plate holding pin 51 rises and is in close contact with the lower surface of the work W without being in close contact with the lipo base 49. As a result, the presser is securely held.

When the work W is a thin plate, the work W is held by the upper plate pressing pin 47 as shown by a two-dot chain line in FIG.
After being pinched by the lower plate pressing pin 51 and the lower plate pressing pin 51, the pressing force of the upper plate pressing pin 47 is smaller than the pressing force of the upper plate pressing pin 47 below. The work W is lowered while sandwiching the work W against the pressing force of the holding pin 51, and the work W is moved to a reference pass line PL on the upper surface of the lipo base 49 as shown by a solid line in FIG. Pressed and fixed by 47.

Since the lower surface of the upper plate pressing pin 47 is provided with an area larger than that of the upper surface of the lower plate pressing pin 51, the upper plate pressing pin 47 reliably presses the upper surface of the lipo base 49 via the work W. W is hard to be damaged,
Further, since the upper surface of the lipo base 49 is provided with an area larger than the lower surface of the upper plate pressing pin 47, the work W is not easily damaged.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes. In the present embodiment, a turret punch press has been described as an example of a plate processing machine, but other punch presses, laser processing machines, and other plate processing machines may be used.

In the above-described embodiment, cylinders are used as the upper plate pressing driving means and the lower plate pressing driving means. However, for example, as shown in FIG. The lower plate holding pin 51 is provided at the tip of the support shaft 69.
Other driving means 9 may be used so that 9 is driven by the solenoid 73 via the link mechanism 71.

Alternatively, the lower plate holding pin may be fixed to the lower frame 3 and the lipo base may be provided to be vertically movable. For example, as shown in FIG.
5 is fixed to the tip of a support shaft 79 passing through an insertion opening 77 provided in the lower frame 3, and the support shaft 79 can be moved up and down by a piston rod 85 of a lower plate pressing cylinder 83 via a connecting member 81. Is provided. In this case, the lipo base 75 moves up and down while being guided by the lower plate holding pin 87. Further, it may have a different structure from the plate holding device shown in FIG.

Alternatively, as shown in FIG. 9, two lower plate holding pins 51 may be moved up and down by one lower plate holding cylinder 89. For example,
The two lower plate holding pins 51 are provided at the tip of the support shaft 69, and each support shaft 69 is
It is provided so as to be able to move up and down by a bearing 67 provided on the lower surface of. The lower ends of the two support shafts 69 are connected to a connecting member 91.
And a substantially central portion of the connecting member 91 is connected to the piston rod 93 of the lower plate pressing cylinder 89.

[0045]

As will be understood from the above description of the embodiments of the present invention, according to the first aspect of the present invention, when the work is a thick plate that is warped, the work is pressed from above by the upper plate pressing member. The lower plate holding member rises to the lower surface of the work and firmly adheres to the work without being pressed down and bent downward, so that the lower plate holding member can be securely held by sandwiching the upper plate holding member above the work. . In the case of a thin work, the pressing force of the lower plate pressing member is smaller than the pressing force of the upper plate pressing member, so that the work can be lowered with the work sandwiched between the upper plate pressing member and the lower plate pressing member. The work can be pressed against the pass line, which serves as the reference of the lipo base, to reliably press the plate.

Further, since the upper plate holding member is provided with a larger area than the lower plate holding member and the lipo base is provided with a larger area than the upper plate holding member, the work is not easily damaged.

According to the second aspect of the present invention, the effect is the same as that of the first aspect, and when the work is a thick plate that is warped, the work is pressed from above by the upper plate pressing member and flexed downward. At least, the lower plate holding member rises to the lower surface of the work and securely adheres to the work, so that the lower plate holding member can be reliably held by sandwiching the upper plate holding member above the work. In the case of a thin work, the pressing force of the lower plate pressing member is smaller than the pressing force of the upper plate pressing member, so that the work can be lowered with the work sandwiched between the upper plate pressing member and the lower plate pressing member. The work can be pressed against the pass line, which serves as the reference of the lipo base, to reliably press the plate.

Further, since the upper plate holding member is provided with a larger area than the lower plate holding member and the lipo base is provided with a larger area than the upper plate holding member, the work is not easily damaged.

According to the third aspect of the present invention, in the case where the work is an upwardly warped thick plate, the lipo base can be raised to securely adhere to the lower surface of the work, and can be securely held by sandwiching the upper plate holding member. . Further, in the case of a thin plate work, since the pressing force of the lipo base is smaller than the pressing force of the upper plate pressing member, the work can be lowered with the work sandwiched between the upper plate pressing member and the lipo base, and the lipo base stops at the reference pass line. Therefore, the work is pressed against the lipo base and the lower plate holding member by the upper plate holding member, and the plate can be reliably held.

Further, since the upper plate pressing member is provided with a larger area than the lower plate pressing member and the lipo base is provided with a larger area than the upper plate pressing member, the work is not easily damaged.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is a front view schematically illustrating a plate holding device.

FIG. 2 is a longitudinal sectional view showing a structure of a lower plate pressing cylinder and a lower plate pressing pin according to the embodiment of the present invention.

FIG. 3 is a front view of a turret punch press used in the embodiment of the present invention.

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is a front view showing a state where a thick work is pressed down.

FIG. 6 is a front view showing a state when a thin work is pressed down by a plate.

FIG. 7 is a front view schematically illustrating a plate holding device according to another embodiment of the present invention.

FIG. 8 is a front view schematically illustrating a plate holding device according to another embodiment of the present invention.

FIG. 9 is a front view illustrating the outline of a plate holding device according to another embodiment of the present invention.

FIG. 10 is a front view schematically illustrating a conventional plate holding device.

FIG. 11 is a front view schematically illustrating another conventional plate holding device.

[Explanation of symbols]

 Reference Signs List 1 Turret punch press 3 Lower frame 9 Upper frame 19 Work table 21 Work moving positioning device 23 Gripping device 41 Plate holding device 43 Upper plate holding cylinder (upper plate holding driving means) 45 Piston rod (of upper plate holding cylinder 43) 47 Upper part Plate holding pin (upper plate holding member) 49 Lipo base 51 Lower plate holding pin (lower plate holding member) 53 Lower plate holding cylinder (lower plate holding driving means) 55 Piston rod (of lower plate holding cylinder 53)

Claims (3)

[Claims] 1. A work is placed on a lipo base and a work table located at substantially the same height as a pass line, and a lower plate holding member that can move up and down in the lipo base is moved upward from the pass line by lower plate holding driving means. An upper plate pressing member having an area larger than the upper surface of the lower plate pressing member from above, and an upper plate pressing drive having a pressing force larger than the lower plate pressing driving means. A plate holding method in a plate material processing machine, wherein the work is pressed in a state in which the lower plate holding member and the upper plate holding member cooperate with each other by being pressed by means. 2. An upper plate pressing member for pressing a work on a work table from above is provided on an upper frame of the plate processing machine so as to be able to move up and down by an upper plate pressing driving means, and has a height substantially equal to a pass line on the work table. A lipo base having an upper surface is provided on a lower frame of the plate material processing machine, and a lower plate pressing member is disposed in the lipo base below the upper plate pressing member so as to be vertically movable by lower plate pressing driving means. A lower surface of the upper plate pressing member is provided to be larger than an upper surface of the lower plate pressing member, and the upper plate pressing driving means is provided to be larger than a pressing force of the lower plate pressing driving means. A plate holding device in a plate material processing machine, characterized in that: 3. An upper plate pressing member for pressing a work on a work table from above is provided on an upper frame of the plate processing machine so as to be able to move up and down by an upper plate pressing driving means, and has a height substantially equal to a pass line on the work table. A lower plate holding member having an upper surface of a lower plate holding member provided on a lower frame of the plate material processing machine; and a lipo base fitted to the outside of the lower plate holding member positioned below and opposed to the upper plate holding member, and a lower plate holding driving means. And the upper plate holding member is provided so as to be able to move up and down and the upper plate holding member is provided above and below the pass line. The lower surface of the upper plate holding member is larger than the upper surface of the lower plate holding member. A plate holding device in a plate material processing machine, wherein the plate holding device is provided with a pressure greater than the pressing force.