JP3295181B2 - Corner shear machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corner shear machine, and more particularly to a corner shear machine capable of automatically moving and positioning a work stopper.

[0002]

2. Description of the Related Art A conventional corner shearing machine for cutting a workpiece by cooperation of an upper blade and a lower blade is provided with a table provided with a V-shaped lower blade which is orthogonal to each other. On the upper surface of the table, a T groove parallel to each lower blade is formed. A work stopper for positioning the work is movably provided in the T groove. In addition, the work stopper has been manually moved and positioned.

[0003]

However, in the conventional manual positioning of the work stopper described above, it takes a long time to set the dimensions or the dimensions are determined by a vernier and a scale attached to the work stopper. There is a problem that is easy to occur. Also, for example, it is difficult for workers such as the elderly to read the vernier scale, and when the clearance between the upper blade and the lower blade is changed, the worker must calculate the correction value of the work stopper and add the correction value each time. However, there is a problem that the correction of the work stopper is very troublesome.

[0004]

[0005]

Means for Solving the Problems Conventional problems as described above
In view of the above, the present invention cooperates with the lower blade arranged in an L-shape.
The upper blade for shearing the work
Along the lower blade on the upper surface of the table in front of the lower blade
Left and right slides in the oblique front-rear direction formed perpendicular to each other
A groove is provided and moves automatically along the above left and right slide grooves
Work can be abutted against each movable body that can be positioned freely.
Corner shear machine with each butting plate
And always directly pulls the moving body backward with a constant force.
This is a configuration provided with a constant load applying mechanism for tensioning.

[0006] The invention according to claim 2 is the invention according to claim 1.
In the corner shear machine, the moving body on the left and right
Each rotating body equipped with the abutment plate can be horizontally and freely rotated and fixed
And each abutment plate is orthogonal to each of the slide grooves.
In the upright position and 45 ° in the positive and negative directions from this position.
In each of the three positions above the moving body
A positioning and fixing device for easily positioning and fixing the body
It is a configuration provided.

[0007]

[0008]

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings.

Referring to FIG. 1, a corner shear machine 1 includes a box-shaped main body frame 3, and a front cover plate 5 is provided at the front side of the main body frame 3 so as to be openable and closable. A body table 7 is provided on the upper part of the body frame 3. In the main body table 7, there is provided a clearance adjustment table 11 that can be finely adjusted in the front-rear direction by a plurality of guide rollers 9.

At the rear of the clearance adjustment table 11, lower blades 13R, 13 which are substantially orthogonally arranged in an L-shape are provided.
L is attached, and a ram 17 having upper blades 15R and 15L for shearing the work W corresponding to the lower blades 13R and 13L is provided to be vertically movable. Further, the upper surface of the clearance adjustment table 11 is clearly shown in FIG.
As can be seen, the T-grooves 19 parallel to the lower blades 13R, 13L
R and 19L are provided in the oblique front-rear direction as slide grooves . The T-grooves 19R and 19L are provided with rotatable work stoppers 21R and 21L for positioning the work. Each of the work stoppers 21R and 21L is provided with an abutment plate 23R and 23L for abutting the work, and further provided with lock levers 25R and 25L for locking the angles of the abutment plates 23R and 23L.

With the above arrangement, the workpiece is abutted against the abutment plates 23R, 23L of the work stoppers 21R, 21L fixed and fixed, and then the ram 17 is moved up and down to thereby lower the lower blades 13R, 13L and the upper blades 15R, 15R. In cooperation with the 15L, a shearing process is performed on the corner of the work.

A high-power box 27 is mounted on the right side surface of the main body table 3 and a column 29 is provided at the rear of the high-voltage box 27 so as to extend in the vertical direction. 31 are provided,
An operation panel 33 is provided on the front of the NC device 31.

A power switch,
An operation ON / OFF switch, a hydraulic ON / OFF switch, a corner, an edge setting switch, a timer, and the like are provided.

As shown in FIG. 2, the NC operation panel 33 has a data input section 33A on the left side and a work stopper operation section 33B on the right side. By operating the switches and keys of the data input section 33A, an NC machining program is created in particular, and the switches of the stopper operation section 33B are operated to position the work stoppers 21R and 21L.

Since the work stoppers 21L and 21R have substantially the same mechanism, details of the work stopper 21R will be described, and description of the work stopper 21L will be omitted. As shown in FIGS. 3 and 4, the work stopper 21R is provided with a movable body 35 movably engaged in the T groove 19R.
The rotating body 37 is attached to the moving body 35 so as to be freely rotatable and fixed. That is, a screw rod 39 is attached to the center of the rotating body 37 and is screwed into a female screw portion 41 formed on the inner surface of the moving body 35. Further, the lock lever 25R is attached to the upper end of the screw rod 39. Therefore, by loosening the lock lever 25R, the rotating body 37 becomes rotatable with respect to the moving body 35, and by tightening the lock lever 25R, the rotating body 37 is fixed to the moving body 35. The moving body 35 is moved along the T groove 19R of the clearance adjustment table 11.

In order to position the work, the abutting member 23 held in a state of being extended in a direction perpendicular to the lower blade 13R in FIGS.
R is integrally mounted. In addition, the rotating body 37
Means that the rotating body 37 can be positioned and fixed at a plurality of specific locations.
A positioning and fixing device is provided for easy operation.
You. That is, a plurality of positioning holes 39A,
39B and 39C are drilled. Positioning pins 43 are removably fitted into positioning bushes 45 provided on the moving body 35 in the positioning holes 39A, 39B, 39C at appropriate positions.

A plurality of positioning holes 39A, 39B, 39C
In FIG. 4, the rotating member 37 is moved in the positive / negative direction, that is, clockwise or counterclockwise from the position where the butting member 23R is perpendicular to the lower blade 11R and the position perpendicular to the lower blade 11R as described above. When rotated 45 degrees, each positioning hole 39A, 39B, 39C is inserted into the positioning bush 45 and positioned.

Therefore, the positioning holes 39A, 39B,
By engaging the positioning pins 43 with the 39C aligned with the positioning bush 45, the abutment member 23R is positioned at 45, 90, and 135 degrees with respect to the material cut surface. When the positioning pin 43 is removed from the positioning bush 45,
The work stoppers 21R, 21L can be positioned at any angle other than 5, 90, 135 degrees by tightening the lock levers 25R, 25L.

A drive box 47 is mounted on the moving body 35 with bolts 49. This drive box 47
5, a shaft 51 that is rotatable in the vertical direction is provided, and a worm gear 53 is fitted on an upper portion of the shaft 51. A worm 55 is meshed with the worm gear 53, and a servo motor 59 is attached to the worm 55 via an output shaft 57. The servo motor 59 is provided with an encoder 61.

At the lower portion of the shaft 51, a dummy pinion 63 and a drive pinion 65 are fitted. The drive pinion 65 is engaged with a rack 67 provided to extend in the T groove 19R. The lower end of the shaft 51 is guided by a guide bar 69 as shown in FIG. Dummy pinion 63 and drive pinion 6
5 is a snap ring 7 as shown in FIG.
1 is fitted to the shaft 51 out of phase. The dummy pinion 63 plays the role of backlash.

[0022] the right end in FIG. 3 of the moving body 35,
One end of a constant load spring 73 as a constant load adding mechanism is attached, and the other end of the constant load spring 73 is wound around a take-up roll 75 provided on the clearance adjustment table 11. Moving body 3 by load spring 73
5 always behind with a constant force because the stretched Tsu direct pull <br/> to (rightward in FIG. 3), but not play by backlash.

With the above configuration, when the servo motor 59 is driven, rotation is transmitted to the shaft 51 via the output shaft 57, the worm 55, and the worm gear 53. Further, the rotation of the shaft 51 is transmitted to the drive pinion 65, and since the drive pinion 65 is meshed with the rack 67, the moving body 35 is automatically moved along the T groove 19R, and the work stopper 21R is accurately positioned. It will be positioned.

When the drive pinion 65 travels along the rack 67, the backlash is eliminated by providing the dummy pinion 63, and the backlash due to the backlash is eliminated by the constant load spring 73.
Therefore, the work stopper 21R is accurately positioned and stopped.

According to the above result, the work stopper 21
Since R and 21L are automatically moved and accurately positioned, it is possible to shorten the processing time and improve the processing accuracy in corner shearing.

The work stoppers 21R and 21L have been described as being movable and rotatably mounted on the clearance adjustment table 11, but as shown in FIGS. 7 and 8,
The LM guide 79 may be moved by being guided by the ball screw 77. In this case, there is no displacement of the work stoppers 21R and 21L as compared with the previous embodiment, so that it is better. Moreover, the servo motor 59,
Since the ball screw 77 and LM guide 79 are attached,
It is different from the clearance adjustment table 11, and even if the clearance is changed, the positioning accuracy is not affected at all.

As shown in FIGS. 8 and 9,
Since the angle of the rotating body 37 is locked at two points by the angle lock lever 81 and the lock lever 25R, the angle can be fixed at an arbitrary angle, and the fine adjustment can be further improved.

Next, the case where the clearance between the lower blades 13R and 13L and the upper blades 15R and 15L, which are adjusted according to the thickness of the work, is changed will be described.

The corner shear machine 1 of the embodiment described above.
In FIG. 10, as shown in FIG. 10, when the clearance adjustment knob 83 provided on the front surface of substantially the center of the clearance adjustment table 11 is turned, the entire clearance adjustment table 11 moves forward and backward. Clearance adjustment table 1
1 includes a lower blade 13R, 13L and a work stopper 21.
Since the entire stopper mechanism such as R, 21L, butting plates 23R, 23L is fixed, even if the work stoppers 21R, 21L are aligned at the same position, the upper blades 15R, 15L
The positions of the work stoppers 21R and 21L with respect to (reference) differ depending on the clearance amount.

Therefore, when the clearance is adjusted, it is necessary to correct the work stoppers 21R and 21L.

In the corner shear machine described above,
When the base material is a product, the upper blades 15R and 15L are used as references, and when the cutout side is a product, the lower blades 13R and 13L are used as standards. In most cases, the upper blades 15R and 15L are used as a reference. In this embodiment, the upper blades 15R and 15L which are orthogonal to each other will be described as an example.

For example, as shown in FIG. 11, when notching a distance a mm from the left end surface of the work W and a distance (cutout depth) b ₁ mm from the upper end surface of the work W, when the blade clearance is the standard value C _1, the workpiece stopper 2
The 1L abutment plate 23L is turned to 45 degrees and the work stopper 21
The R abutment plate 23R is positioned and set at 135 degrees as shown by the dashed line.

[0033] The clearance simply just from the standard value C ₁ at the time was changed to C _2, the work stopper 21R,
21L together with the clearance adjustment table 11
, Move downward and work stoppers 21R, 21R.
L (butting plates 23R, 23L) move to the positions indicated by the solid lines, respectively, and the lower blades 13R, 13L move away from the positions indicated by alternate long and short dash lines with respect to the upper blades 15R, 15L.

That is, the abutting plate 23L maintains the amm without being affected by the abutting surface and the moving direction of the clearance adjustment table 11 being the same, but the abutting plate 23R is b ₂
mm (dimensions at clearance C ₂ ). Notch size in this case is a, a b _1, a, and b _2. Where b
₂ = b ₁ −√2 (C ₂ −C ₁ ).

Therefore, the notch depth is reduced by √2 (C ₂ −C ₁ ), so that the clearance is reduced by C
When changing the C ₂ from _1, abutment plate 23L (45
The correction amount of 0 ° and the correction amount of the abutment plate 23R (135 °) are automatically corrected by calculating the correction amount by √2 (C ₂ −C ₁ ) mm by the NC device 31 and the work stoppers 21R and 21L are automatically corrected. Positioning will be performed automatically.

As shown in FIG. 12, when the work W is notched at a right angle from the top of the work W at a dimension of E ₁ , F ₁ mm, when the clearance of the upper and lower blades is the standard value C ₁ , The abutment plates 23R and 23L of the stoppers 21R and 21L are positioned and set at 90 degrees, respectively, as shown by a dashed line.

[0037] The clearance simply just from the standard value C ₁ at the time was changed to C _2, the work stopper 21R,
21L together with the clearance adjustment table 11 are shown in FIG.
, Move downward and work stoppers 21R, 21R.
L (butting plates 23R, 23L) move to the positions indicated by the solid lines, respectively, and the lower blades 13R, 13L move away from the positions indicated by alternate long and short dash lines with respect to the upper blades 15R, 15L.

That is, the butting plates 23R and 23L escape downward by √2 (C ₂ −C ₁ ) mm, and the desired (E ₁ m)
m, F ₁ mm) from the notch [E _1- (C ₂ -C ₁ ) m
m, F ₁ − (C ₂ −C ₁ ) mm]. Therefore, in each case, the notch becomes smaller by (C ₂ −C ₁ ) mm.
The clearance when changing from C ₁ to C _2, the abutment plate 23R, the correction amount of 23L (90 °) (C ₂ -C ₁₎
mm is calculated and automatically corrected by the NC unit 31, and the positioning of the work stoppers 21R and 21L is automatically performed.

As can be understood from the above description, when the clearance angle is changed from C ₁ to C ₂ when the stopper angles of the abutment plates 23R and 23L in the work stoppers 21R and 21L are 45, 90 and 135 degrees, NC Device 31
By'll enter a C ₂ to the correction amount 0 in the NC device _{31, (C 2 -C 1)} , √2 (C 2 -C 1) mm is automatically processing, only more the correction amount workpiece stopper 2
Positioning of 1R and 21L can be automatically corrected. Therefore, the cutting accuracy of the workpiece W is not affected by the change in the clearance.

[0040] In the above description, the standard clearance C ₁ based on the, from time to time of the difference workpiece stopper 21R over correction look at the clearance, has been described in example of performing correction control of the 21L, the upper blade 15R , 15L near the vertex is set as a temporary origin, and the origin position is updated each time the clearance is changed, and the work stoppers 21R, 21R are determined based on the origin position.
The correction control of L may be performed. In addition, since the cutout side is a product, the basic correction method is the same even if the lower blades 13R and 13L are set to a reference.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes.

[0042]

The present invention can be understood from the above description of the embodiments.
As described above, according to the present invention, the L
Obliquely perpendicular to each other along the lower blades 13L and 13R
The right and left slide grooves 19R and 19L formed in the front-rear direction
Each movable body 35 which can be automatically moved and positioned along the
By the load applying mechanism, it is always possible to directly pull backward with a constant force.
Each moving body 35 is stretched along the slide groove.
When moving in the front-rear direction and positioning,
The backlash in the mechanism is always kept at zero.
Therefore, each moving body 35 puts the work on the abutting plate provided on the front side.
When the moving body 35 is positioned in contact with the
Precise positioning without slight movement in the direction
Is what you can do.

In the invention according to claim 2, the moving body 3
5 is provided with a rotating body 37 having an abutment plate so as to be freely rotatable and fixed.
But the butting plate is perpendicular to the slide groove
Position and a state rotated 45 ° in the positive and negative directions from this position
The rotating body 37 with respect to the moving body 35
A positioning and fixing device for easy positioning and fixing is provided.
Therefore, it is necessary to fix the abutment plate to the three specified locations.
Can be performed quickly and easily, and efficiency can be improved.
You can do it.

[Brief description of the drawings]

FIG. 1 is a perspective view of a corner shear machine according to an embodiment of the present invention.

FIG. 2 is an enlarged front view illustrating an example of an operation panel.

FIG. 3 is an enlarged sectional view of a work stopper portion.

FIG. 4 is a plan view of FIG.

FIG. 5 is a sectional view taken along line VV in FIG. 4;

FIG. 6 is a perspective view showing a state in which a dummy pinion and a drive pinion are attached.

FIG. 7 is a schematic plan view showing another embodiment.

FIG. 8 is a sectional view showing a state in which the works stopper is driven.

FIG. 9 is a plan view of FIG.

FIG. 10 is an explanatory diagram for adjusting the clearance between the upper and lower blades.

FIG. 11 is an explanatory diagram of an example in which each work stopper is corrected when the clearance between the upper and lower blades is changed.

FIG. 12 is an explanatory diagram of an example of correcting each work stopper when the clearance between the upper and lower blades is changed.

[Explanation of symbols]

 Reference Signs List 1 corner shear machine 7 main body table 11 clearance adjustment table 13R, 13L lower blade 15R, 15L upper blade 17 ram 19R, 19L lower groove 21R, 21L work stopper 23R, 23L butting plate 31 NC device (control device) 35 moving body 37 times Moving body 53 Worm gear 55 Worm 59 Servo motor 61 Encoder 63 Dummy pinion 65 Drive pinion 67 Rack 83 Clearance adjustment knob

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B23D 15/06 B23D 33/10

Claims (2)

(57) [Claims] 1. A lower blade (13R, 13R) arranged in an L-shape.
Upper blade (15R,
15L) is provided to be vertically movable, and the lower blades (13R, 13R) are provided.
L) on the upper surface of the table (11) in front of the lower blade (1).
3L, 13R) diagonally in front of each other
The rear left and right slide grooves (19R, 19L) are provided,
Automatic along the left and right slide grooves (19R, 19L)
Each moving body (35) provided to be movable
Abutment plates (23R, 23L) that can abut the workpiece
In each of the corner shear machines provided,
To directly pull the body (35) backwards with a constant force
A corner shearing machine provided with a constant load applying mechanism . 2. A corner shear machine according to claim 1.
, The abutment plate is attached to the left and right moving bodies (35).
(23R, 23L) and each rotating body (37)
The abutment plates (23R, 2R)
3L) is orthogonal to each of the slide grooves (19R, 19L).
In the upright position and 45 ° in the positive and negative directions from this position.
To each of the moving bodies (35)
Position for easily positioning and fixing each rotating body (37)
A corner shear machine provided with a fixing device .