JP3046513B2 - Blade changing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade changing device for taking out or mounting a blade and a blade part for positioning the blade on a blade shaft of a slitter facility for slitting a metal band.

[0002]

2. Description of the Related Art As shown in FIG.
Blade axes 4A and 4B are vertically arranged between the fixed stand 2 and the movable stand 3, and these blade axes 4A and 4B
Is equipped with a blade 5. Blade axes 4A and 4B
Are fitted on a drive shaft 6 and a driven shaft 7 respectively arranged on the fixed stand 2 and the movable stand 3 so as to be rotatable. Geared motor 8 installed on fixed stand 2
The operation of the worm 9 and the worm wheel 10,
The positions of the vertically arranged blade shafts 4A and 4B are adjusted via the gears 11A and 11B, and an appropriate gap is set between the blades 5 of the blade shafts 4A and 4B. By continuously passing a metal band (not shown) between the blade shafts 4A and 4B, the metal band is multi-cut into a predetermined slit width or side-trimmed.

As shown in FIG. 11, a plurality of spacers 12 corresponding to the slit width are provided between the plurality of blades 5 on the blade shafts 4A and 4B. A ring or a MC nylon 13) is applied in a laminated manner, and the blade 5 is positioned using a collar 14 and a nut 15. The spacer 12, the cushioning material 13 and the collar 14 are configured as a blade part.

Therefore, in order to change the slit width of the metal strip, the blade 5, the spacer 1
2. It is necessary to remove the cushioning material 13 and the like, and attach the blade 5, the spacer 12, the cushioning material 13 and the like in a new arrangement state.

Conventionally, as shown in FIG. 9, the blade changing operation is performed by first operating a geared motor 16 to move the movable stand 3 relative to the frame 17 in the axial direction of the blade shafts 4A and 4B. The blade shafts 4A and 4B are detached from the driven shaft 7 of the movable stand 3 and brought into a cantilever state. Next, by operating a crane (not shown), the cantilevered tool shafts 4A and 4B are lifted, removed from the drive shaft 6, and set on the mounting shaft 19 of the tool rest 18 shown in FIG. The blade shaft 4A set on the mounting shaft 19
Alternatively, the blade 5, the spacer 12, the cushioning material 13 and the like are removed from each of the blades 4B, and the blade shafts 4A,
The blade 5, the spacer 12, the cushioning material 13, and the like are attached to the 4B again, and the blade replacement operation is completed.

However, in the conventional blade changing operation as described above, when the slitter equipment 1 is for slitting a thick metal band, the weight of the blades 5 and the spacers 12 of the blade shafts 4A and 4B is reduced, for example. The weight is about 30 to 50 kg per sheet, and blade replacement work becomes heavy labor. Also, in order to ensure the shear quality of the product, the blade shaft 4A or 4B and the blade 5
Is set to, for example, about 50 to 100 μm or less, and the surface of the blade shaft 4A or 4B may be scratched when the blade 5 is attached or detached.

Therefore, as in the invention described in Japanese Patent Application Laid-Open No. H4-101715, a controller (upper-level computer) controls a round blade storage device, a round blade supply device, and a round blade automatic assembling device so that the blade shaft can be attached to the blade shaft. There has been proposed a blade changing device in which the delivery of a round blade is mechanized.

[0008]

However, in the blade changing device described in the above-mentioned publication, the Z-direction driving device, the Y-direction driving device and the insertion direction driving device of the round blade automatic assembling device are operated, and the fine movement driving device is further moved. Is operated to make the round blade holder holding the round blade coincide with the axis of the blade shaft, so that the device structure is complicated and the cost is increased.

Further, the axis of the blade shaft fluctuates due to a mounting error, its own weight, and the like. However, since there is no device for detecting the fluctuated shaft center, the round blade held by the round blade holder is not provided. Therefore, the surface of the blade shaft may be scuffed.

In view of the above-mentioned circumstances, the invention according to claim 1 can improve the working efficiency by mechanizing the blade changing operation, and at the same time, the generation of galling on the surface of the blade shaft during the blade changing operation. It is an object of the present invention to provide a blade replacement device that can prevent the occurrence of a problem and improve the reliability of the device. A further object of the present invention is to provide a blade replacement device that can simplify the structure of the device.

[0011]

According to a first aspect of the present invention, there is provided a blade replacement device for detaching a blade and a blade component for positioning the blade from a blade shaft of a slitter facility, the blade and the blade. A storage device that individually stores components on a plurality of storage shafts, a shaft support device that supports the blade shaft in a cantilever state, and a blade replacement hand that holds the blade or blade component at an arm tip of a moving unit. A handling device that transfers the blade or blade component between a storage shaft of the storage device and the blade shaft supported by the shaft support device; and a shaft support device installed in the handling device. An axis detection sensor that detects the amount of deviation of the axis of the blade axis, which is installed in the blade axis, stores blade replacement information, and operates the handling device based on the blade replacement information. The blade or the blade part is attached to and detached from the blade shaft supported by a shaft support device, and the moving axis of the blade replacement hand is set to the axis of the blade shaft based on a detection value from the axis detection sensor. And a control device for matching the blades, wherein the blade replacement hand directly
Move in the radial direction to move the outer circumference of these
A pair of grips that can be gripped, and those of these grips
Each of the blades or blade parts is provided with a blade.
A pair of pressing portions that can be pressed on the object axis,
The control device inserts the blade or blade component into the tip of the blade shaft.
Until they are passed through, insert the blade or blade part
Grip the outer periphery with the gripping part, and place the blade or blade part on the blade axis.
In the process of moving, release the outer periphery gripping by the gripper and change the blade
Make sure that the axis of movement of the pressing part of the hand matches the axis of the tool axis.
And presses the end face of the blade or the blade part by the pressing portion.
By doing so, the blade or blade part is perpendicular to the blade axis.
Place the blade or blade part on the blade axis in the
It is designed to be pushed and mounted at the desired position .

[0012]

[0013]

[Function] "Overrun of moving the blade or blade part on the blade axis
In this case, the outer surface is not gripped, and the end face is
And press-in movement. "
Misalignment is detected in advance, and the pressing portion of the blade replacement hand is
By moving the tool in line with the axis of the tool axis,
"The outer circumference where the blade or blade part is set perpendicular to the blade axis
It was installed by pushing it in the free state.
No scuffing occurs on the surface. The control device is
Detecting the deviation of the axis of the blade axis only once, then
The operation of the blade replacement hand can be controlled and is simple.

[0014]

[0015]

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing an embodiment of the blade changing device according to the present invention. FIG. 2 is an arrow view along the line II-II in FIG. FIG. 3 is an enlarged front view showing the blade replacement hand of FIG. 4A is a view taken in the direction of the arrow IVA in FIG. 3, and FIG. 4B is an enlarged sectional view of the IVB portion in FIG. 4A. FIG. 5 is a front view showing a gripping claw operating mechanism in the blade replacement hand shown in FIG. 3, in which (A) is partially cut away and (B) is shown.
5A is a view on arrow VB in FIG. FIG. 6 is an operation diagram showing the operation of the distance sensor. FIG. 7 is an operation diagram showing the mounting operation of the blade or the spacer in the blade changing device of FIGS. 1 and 2. FIG. 8 is an operation diagram when the spacer is removed in the blade changing device. In this embodiment, the same parts as those of the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The blade changing device 20 shown in FIGS. 1 and 2 has a blade 5, a spacer 12 or a cushioning material 1 on the blade shafts 4A and 4B.
3, a storage device 21, a tool post 18 as a shaft support device, a handling device 22,
Distance sensor 23 as axis center detection sensor and control device 2
4.

In the storage device 21, a plurality of storage shafts 26 are installed on a work table 25, and the cutter 5, the spacer 12, and the cushioning material 13 are individually stored on these storage shafts 26. For example, the number of the blades 5 is constant in the inner diameter and the thickness, and a required number of the blades 5 are stored on the storage shaft 26 for each outer diameter. The spacers 12 have a fixed inner diameter and an outer diameter, and are stored on the storage shaft 26 by a required number of thicknesses according to the thickness. Further, the buffer material 13 has a constant inner diameter and a constant thickness and is stored on the storage shaft 26 in a required number for each outer diameter. The storage of these blades 5, spacers 12, and cushioning material 13 is managed by address, and the management information is input to the control device 24.

As described above, the tool rest 18 has the mounting shaft 19 (FIG. 10), and the tool shaft 4A or 4B removed from the slitter equipment 1 shown in FIG.
In addition, it can be mounted and supported in a cantilever state. As the shaft supporting device, the movable stand 3 may be slid by the slitter equipment 1 of FIG. 9 so that the blade shaft 4A or 4B can be mounted and supported on the drive shaft 6 of the fixed stand 2 in a cantilever state.

As shown in FIGS. 1 and 2, the handling device 22 includes a six-axis articulated robot 27 as a moving unit and a blade replacement hand 30, and includes a storage shaft 26 of a storage device 21, Tool shaft 4 supported by table 18
The blade 5, the spacer 12, or the cushioning material 13 is delivered between A and 4B. 6-axis articulated robot 27
Is configured as an existing technology capable of moving the blade changing hand 30 vertically or horizontally. Further, the blade replacement hand 30 is an arm 28 in the six-axis articulated robot 27.
Is attached to the tip of the bracket by a mounting bracket 31.

As shown in FIGS. 3 and 4, the blade replacement hand 30 has a pair of outer peripheral gripping claws 32A and 32A as gripping portions.
B and a pair of pressing plates 33A and 33 as pressing portions
3B, a cushion mechanism 35 having a coil spring 34, and a gripping claw operating mechanism 37 for operating the outer circumferential gripping claws 32A and 32B.

As shown in FIG. 3, the gripping claw operating mechanism 37 includes a pair of sliders 39A and 39A having a claw mounting portion 38.
9B are formed with racks 40A and 40B, respectively. These racks 40A and 40B are engaged with the pinion 41, and one slider 39A is connected to the piston rod 43 of the air cylinder device 42.
When one slider 39A is moved in the direction of arrow A (FIG. 5B) by the air cylinder device 42, the other slider 39B moves in the direction of arrow B (FIG. 5B) via the pinion 41. And both sliders 39A and 39A
B can approach or leave.

The air cylinder device 42 has two sets of pistons and piston rods arranged in series.
This is a two-stage stroke type air cylinder device. Therefore,
The air cylinder device 42 enables the sliders 39A and 39B of the gripping claw operating mechanism 37 to be stopped at the intermediate stroke position M and the full stroke position N, respectively. FIG.
Reference numeral 44 in (A) denotes a pinion shaft, and the pinion 41
And the pinion 41 is rotatably supported.

The outer peripheral gripping claws 32A shown in FIGS.
Is fixed to the claw mounting portion 38 of one slider 39A of the gripping claw operating mechanism 37 via the fixing plate 45, and the outer circumferential gripping claw 32B is fixed to the claw mounting portion of the other slider 39B via the fixing plate 45. 38. The outer peripheral gripping claws 32A and 32B have a plate shape, and the gripping surface 46A of the outer peripheral gripping claw 32A is formed in a flat surface, and the gripping surface 46B of the outer peripheral gripping claw 32B is formed in a concave shape. The outer peripheral gripping claws 32A and 32B are moved in the diametrical direction of the blade 5, the spacer 12 or the cushioning material 13 by the gripping claw operating mechanism 37 and the air cylinder device 42, and the blades 5 and the spacers are gripped by the gripping surfaces 46A and 46B. 12 or the outer periphery 47 of the cushioning material 13 can be gripped.

A support plate 48 is bolted to the front surfaces of the outer peripheral gripping claws 32A and 32B. The pressing plate 33A is provided on the supporting plate 48 of the outer peripheral gripping claw 32A, and the pressing plate 33 is provided on the supporting plate 48 of the outer peripheral gripping claw 32B.
B are installed via the cushion mechanism 35, respectively. These pressing plates 33A and 33B can press the blade 5, the spacer 12, or the end face 49 of the cushioning material 13 by the operation of the arm of the six-axis articulated robot.

As shown in FIG. 4B, the cushion mechanism 35 has a bush 51 with a flange fixed to one end of the pin 50 with a screw, and this bush 51 is inserted into the through hole 52 of the support plate 48. Is fixed to the pressing plates 33A and 33B with bolts, and a coil spring 34 is interposed between the pressing plate 33A or 33B and the support plate 48. The bush 51 is slidable in the through hole 52 in the axial direction of the blade replacement hand 30.

Accordingly, when the pressing plates 33A and 33B press the blade 5 or the end face 49 of the spacer 12,
These blades 5 or spacers 12 are installed at an angle with respect to the blade shaft 4A or 4B for some reason, and one pressing plate 33A or 33B abuts on the blade 5 or spacer 12, and the other pressing plate 33B or 33.
Even when A does not abut, the coil spring 34 on the abutting side contracts, and simultaneously presses the blade 5 or the spacer 12 with the two pressing plates 33A and 33B.
By the reaction force of the coil spring 34, the blade 5 or the spacer 12 is corrected to be perpendicular to the blade shaft 4A or 4B.

As shown in FIG. 3, the distance sensor 23 is fixed to one end surface of the gripping claw operating mechanism 37 of the blade changing hand 30 and measures the distance to the object using, for example, a laser beam. is there. As described above, the axis O of the blade axis 4A or 4B set on the blade replacement table 18 is inclined due to an error at the time of setting, backlash, or bending of the blade axis 4A or 4B, as shown in FIG. It may be the axis P. The distance sensor 23 measures the distance of the tip of the blade shaft 4A or 4B before or during the blade replacement operation, and detects the amount of deviation e of the axis. This detected value is input to the control device 24.

The control device 24 shown in FIG. 1 includes a slit width and the number of strips set for each metal band, a plate thickness of the metal band, and a combination of the blade 5 used, the spacer 12 and the cushioning material 13 based on the information. Information is stored. Such stored information is hereinafter referred to as “blade replacement information”. The control device 24
The handling device 22 is operated based on the blade replacement information, the necessary blade 5, the spacer 12, and the cushioning material 13 are taken out from the management information of the storage device 21, and attached to the blade shaft 4A or 4B supported by the tool post 18, Or blade axis 4
From A or 4B, blade 5, spacer 12 and cushioning material 13
Is removed and stored on a predetermined storage shaft 26 of the storage device 21.

That is, when the control device 24 attaches the blade 5 or the spacer 12 to the blade shaft 4A or 4B, first, as shown in FIG. 1, FIG. 2 and FIG. The robot 27 is operated to move the blade changing hand 30 to the storage device 21, and the gripping claw operating mechanism 37 driven by the air cylinder device 42 in the blade changing hand 30 causes the pair of outer circumferential gripping claws 32 to operate.
A and 32B, the blade 5 on the storage shaft 26, the spacer 1
2 or the outer periphery 47 of the cushioning material 13 is gripped one by one. In this state, the control device 24 operates the 6-axis articulated robot 27 to spatially handle the blade 5, the spacer 12, and the cushioning material 13, and to control the blade shaft 4A supported by the tool post 18.
Alternatively, the blade 5, the spacer 12, or the cushioning material 13 is inserted into the tip of 4B. Thereafter, the control device 24 activates the blade changing hand 30 to cause the outer peripheral gripping claws 32A and 32B
Of the blade 5, the spacer 12 or the cushioning material 13 is released, and the blade 5, the spacer 12 or the cushioning material 13 is pressed by the pressing plates 33A and 33B. FIG.
In the direction of arrow C. Thus, the tool post 1
The blade 5, the spacer 12, or the cushioning material 13 is mounted on the blade shaft 4A or 4B supported by the blade 8.

At this time, as shown in FIG. 3, since the outer diameter D of the blade 5 is larger than the outer diameter d of the spacer 12 or the cushioning material 13 (D> d), the pressing plates 33A and 33B
When the control device 24 presses the blade 5, the control device 24 sets the sliders 39A and 39B of the gripping claw operating mechanism 37 to the intermediate stroke position M (FIG. 5) by operating the air cylinder device 42, and moves the pressing plates 33A and 33B. FIG.
And the spacer 12 or the cushioning material 13
Is pressed, the sliders 39A and 39B are set to the full stroke position N (FIG. 5), and the pressing plate 3
3A and 33B are Y positions in FIG.

When the outer peripheral gripping claws 32A and 32B grip the outer periphery 47 of the blade 5, the spacer 12, or the cushioning material 13, the control device 24 sets the gripping surface 46A of the outer peripheral gripping claw 32A and the gripping surface of the outer peripheral gripping claw 32B. The air cylinder device 42 is operated to move the sliders 39A and 39B of the gripping claw operating mechanism 37 until 46B comes into contact with the blade 5, the spacer 12, or the outer periphery 47 of the cushioning material 13.

Next, as shown in FIG. 8, when removing the spacer 12 mounted on the blade shafts 4A and 4B, the control device 24 firstly presses the pressing plate 3 of the blade changing hand 30.
At 3A and 33B, the end face 49 of the blade 5 having a large outer diameter D
To move it to the tip of the blade shaft 4A or 4B.
At B, the outer periphery 47 of the spacer 12 is gripped and spatially handled, and moved to the storage shaft 26 of the storage device 21. Removal of the blade 5 and the cushioning material 13 is performed in the same manner.

Further, the control device 24 is supported on the tool rest 18 by the distance sensor 23 before or during the work of attaching or detaching the tool 5, the spacer 12 or the cushioning material 13 to or from the tool shaft 4A or 4B. The deviation amount e of the axis O of the blade axis 4A or 4B is detected. Control device 24
Makes the moving axis of the blade changing hand 30 in the handling device 22 coincide with the axis P after the axis deviation based on the detected value of the deviation e of the axis.

According to the above embodiment, under the control of the control device 24, the handling device 22 moves the cutter 5, the spacer 12, and the cushioning material 13 from the storage shaft 26 of the storage device 21 based on the blade replacement information. The blade replacement work can be mechanized without manual operation, and the efficiency of blade replacement work can be improved.

Further, the control device 24 causes the distance sensor 23 to detect the axis O of the tool shaft 4A or 4B supported by the tool rest 18 before or during the blade changing operation, and based on the detected value, handling is performed. The axis of movement of the blade replacement hand 30 of the device 22 is set to the axis P after the axis of the blade axis 4A or 4B is shifted.
, The blade 5, the blade 5,
The spacer 12 or the cushioning material 13 is attached to the blade shaft 4A or 4B.
When the blade is moved upward, the blade 5, the spacer 12, or the cushioning material 13 does not cause the surface of the blade shaft 4A or 4B to be scratched, and the reliability of the blade changing device 20 can be improved.

Further, the pressing plate 33 of the blade changing hand 30
A and 33B are blades 4, spacers 12 or cushioning materials 13
To move the blade 5, the spacer 12 or the cushioning material 13 on the blade shaft 4 </ b> A or 4 </ b> B, the moving axis of the blade replacement hand 30 by the 6-axis articulated robot 27 in the handling device 22. Is unstable, the blade 5, the spacer 12, or the cushioning material 13 can prevent the surface of the blade shaft 4A or 4B from being scratched. For this reason, the structure of the handling device 22 can be simplified, and the cost of the blade changing device 20 can be reduced.

Further, a pair of pressing plates 33A and 33
B is installed on the pair of outer peripheral gripping claws 32A and 32B via the coil spring 34 of the cushion mechanism 35, respectively, so that the blade 5 or the spacer 12 is initially pressed by the pair of pressing plates 33A and 33B. Is installed obliquely with respect to the blade shaft 4A or 4B, even when one pressing plate 33A or 33B comes into contact with the blade 5 or the end face 49 of the spacer 12, and the other pressing plate 33B or 33A does not come into contact.
Due to the contraction of the coil spring 34, both pressing plates 33A and 33B can simultaneously press the blade 5 or the end face 49 of the spacer 12. Then, the cutter 5 or the spacer 12 can be set to be perpendicular to the cutter shaft 4A or 4B by the reaction force of the coil spring 34 during the movement of the cutter 5 or the spacer 12. As a result, it is possible to more reliably prevent the cutting tool 5 or the cutting component 12 from scoring on the surface of the cutting tool shaft 4A or 4B.

In the above embodiment, the pressing plate 33A of the blade changing hand 30 in the handling device 22 is used.
And the tool shaft 4 supported on the tool rest 18 by 33B
A description has been given of the case where the cushioning material 13 is pressed and moved on A or 4B. However, since the clearance between the cushioning material 13 and the cutter shaft 4A or 4B is large, the outer periphery 47 of the cushioning material 13 is The cushioning material 13 may be moved on the blade shaft 4A or 4B while holding the gripper.

[0040]

As described above, according to the blade changing device of the first aspect, the blade changing operation can be mechanized to improve the working efficiency, and at the same time, the surface of the blade shaft is seized during the blade changing operation. The occurrence of scratches can be prevented, and the reliability of the device can be improved. Further, according to the blade changing device of the second aspect, the structure of the device can be simplified.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a blade changing device according to the present invention.

FIG. 2 is an arrow view along the line II-II in FIG. 1;

FIG. 3 is an enlarged front view showing the blade replacement hand of FIG. 2;

FIG. 4A is a view taken in the direction of arrows IVA in FIG. 3, and FIG.
FIG. 4B is an enlarged cross-sectional view of the IVB part in FIG.

5A and 5B are front views showing a gripping claw operating mechanism in the blade replacement hand shown in FIG. 3, in which FIG. 5A is partially cut away, and FIG. 5B is a view taken in the direction of arrows VB in FIG. 5A. FIG.

FIG. 6 is an operation diagram showing an operation of the distance sensor.

FIG. 7 is an operation diagram showing an attaching operation of a blade or a spacer in the blade changing device of FIGS. 1 and 2;

FIG. 8 is an operation diagram at the time of removing a spacer in the blade changing device.

FIG. 9 is a sectional view showing a slitter facility.

FIG. 10 is a front view showing a part of a tool shaft installed on a tool rest, in a cutaway manner;

FIG. 11 is a cross-sectional view showing a blade shaft, a blade, and the like shown in FIGS. 9 and 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slitting equipment 4A, 4B Blade axis 5 Blade 12 Spacer 13 Buffer material 18 Turret 20 Blade replacement device 21 Storage device 22 Handling device 23 Distance sensor 24 Control device 26 Storage shaft 27 6-axis multi-joint robot 28 Arm 30 Blade replacement hand 32A , 32B Outer gripper 33A, 33B Press plate O Axis of cutter axis e Axis shift

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yutaka Takemoto 1-1, Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries, Ltd. Inside the Akashi Plant (56) References JP-A-4-101715 (JP, A) JP Hei 3-149120 (JP, A) Japanese Utility Model Hei 4-76316 (JP, U) Japanese Utility Model Hei 3-121572 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23D 35 / 00 B23D 19/06 B25J 15/08

Claims (1)

(57) [Claims] 1. A blade replacement device for detaching and mounting a blade and a blade part for positioning the blade on a blade shaft of a slitter facility, wherein the blade and the blade part are individually stored in a plurality of storage shafts. Device, a shaft support device for supporting the blade shaft in a cantilever state, and a blade replacement hand for holding the blade or blade component at the end of an arm of a moving unit, the storage shaft of the storage device and the shaft A handling device that transfers the blade or the blade component to or from the blade shaft supported by a supporting device; and a shift amount of an axis of the blade shaft that is installed in the handling device and installed in the shaft supporting device. And a blade center information sensor, which stores the blade replacement information, operates the handling device based on the blade replacement information, and controls the blade shaft supported by the shaft support device. Causes releasably the serial blade or blade part, based on a detected value from the axis detection sensor, and a control device for the movement axis of the blade replacement hand coincides with the axis of the tool shaft, the blade Replacement hand moves in the diameter direction of the blade and blade part
To make it possible to grip the outer periphery of these blades or blade parts.
A pair of grips, and the blades or
A pair of pushes that allow the end surface of the blade part to be pressed on the blade axis
Pressure unit, and the control device inserts the blade or the blade component into the tip of the blade shaft.
Until they are passed through, insert the blade or blade part
Grip the outer periphery with the gripping part, and place the blade or blade part on the blade axis.
In the process of moving, release the outer periphery gripping by the gripper and change the blade
Make sure that the axis of movement of the pressing part of the hand matches the axis of the tool axis.
And presses the end face of the blade or the blade part by the pressing portion.
By doing so, the blade or blade part is perpendicular to the blade axis.
Place the blade or blade part on the blade axis in the
A blade changing device, which is pushed into a desired position and mounted .