JPS6039485B2 - bar shearing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nada cutting machine that progressively divides twill into uniform dimensions.

Conventional scale cutting machines of this type are capable of cutting birch wood to a certain size by providing a birch wood abutment in front of the die, but when cutting the birch wood, the birch wood is cut with a punch. Because the end face of the cut part of the lumber rubs against the abutment, the end face of the cut part will be damaged as if it is gouged out by the abutment in the later stages of cutting, so it is not suitable for cases where precision products are required. There were drawbacks.

Therefore, the purpose of this invention is to provide a cutting machine that does not cause damage to the machine surface of the cutting part of bamboo wood, and the purpose of this invention is to prevent the cutting edge surface from being forced into friction with the abutment while cutting the wood. The cut-off portion can be separated from the abutment without resistance upon completion of cutting.

The present invention will be described below with reference to drawings of embodiments, and in this specification, "front" indicates the direction in which the tribute material is fed.

A movable body 2 is provided in front of the cylindrical die 1 so as to be adjustable back and forth,
The abutment 3 of Kabamura A is attached to the rear end of the movable body 2 so as to be movable up and down, the abutment 3 is urged upward by the air pressure of the air cylinder 4, and the abutment 3 is pushed down to the holder 6 of the punch 5. A companion roller 7 for pushing is attached.

The movable body 2 is formed in the shape of a cap nut with a screw hole 8 opening forward, and is engaged with a pair of left and right guides 9, 9 so as to be movable back and forth, and the center float 10 is screwed into the screw hole 8. , motor 11
The mandrel 10 is made to rotate, and a clutch is housed in the part 12, and a slit plate 13 is fixed thereto as a device for automatically controlling the rotation of the mandrel 10, and 14 is a pulse measuring device. be. Further, a roller 16 is attached to the tip of the rod 15 of the air cylinder 4 provided at the lower end of the movable body 2, and a substantially triangular oscillating body 17 is interposed between the roller 16 and the lower surface of the abutment 3. 17 is supported on the movable body 2, and a roller 18 for pushing up the abutment 3 is attached to the tip of the rocking body 17. In addition, an arcuate surface 21 and a slope 22 are continuously formed below the height position P of the center of the die 1 on the joint surface 201 of the rear end of the movable body 2 with the abutment 3, and protrusions are formed on both ends of the joint surface 20. A plate-shaped mounting part 23 that sandwiches the pad 3
, 23 are provided in a protruding manner, and a guide groove 24 is provided on the inner surface of the mounting portions 23, 23 and similarly extends up and down from the height position P of the center of the die 1.
The upper part 25 of the guide groove 24 is formed perpendicularly to the above-mentioned position, and the lower part 26 is formed in an arc shape with the center of the circle ◯ that is substantially the same as the arc surface 21 of the movable body 2. And this guidebook 24
The shaft 27 of the abutment 3 is engaged with the abutment 3, and in order to open the guide groove 24 so that the abutment 3 can be attached and removed, the upper end 28 of the abutment 3 is separated and fixed with a bolt 29. be. Further, a pot-shaped engagement piece 30 for the abutment 3 is provided protruding from the upper end of the joint surface 20 of the movable body 2, and is fixed with a bolt 31. The abutment 3 has a contact surface 32 with the bamboo wood A protruding, an upper surface 33 is curved above the abutment 3, and a shaft 27 is provided protruding above the upper and lower center of the contact surface 32. Forming an arc-shaped curved surface 34 centered on the center Q of 27,
At the front end of the curved surface 34, there is provided an upward groove-shaped engagement portion 35 that engages with the engagement piece 30 of the movable body 2, and furthermore, a sensing rod 36 against which the bamboo wood A abuts can be elastically pushed into the center of the contact surface 32. A proximity switch 37 is provided in a protruding manner in the center thereof and sends a cutting start signal when the sensing bar 36 is pushed in.

The accompanying roller 7 is provided with a forward extension part 38 on the punch holder 6, and is attached to a bag branch 39 hanging down from the extension part 38, so that the companion roller 7 is spaced apart from the punch 5 and is attached to the apex of the curved surface 34 at the upper end of the abutment 3. It is designed to come into contact with the twill material A at the beginning to middle stage of cutting.

Note that a feeding device for the camellia material A (not shown) is provided behind the die 1. Since this invention has the above configuration,
When the offering material A protruding from the die 1 comes into contact with the abutment 3,
The punch 5 descends and cutting of the birch material A begins.

At the same time as cutting starts, the companion roller 7 does not push the abutment 3, but the engaging piece 3 of the movable body 2 is caught by the abutment 3, and is held in a stable state. As with the conventional method, at the beginning of cutting, the cutoff part a of the bamboo material A
The end face of the abutment 3 rubs against the contact surface 32 of the abutment 3 without any force. Next, when the accompanying roller 7 contacts the abutment 3, the cut portion a of the twill material A descends together with the abutment 3, so that
The cut end surface A will not rub against the abutment 3 and will not be damaged. In addition, in the latter stage of cutting, the ball 27 of the abutment 3 approaches the lower part 26 of the guide groove 24 and is gradually guided forward along the shape of that part, so the abutment 3 is cut off at the cut-off part a. The contact between the parts loosens little by little, and a gap is created between them. However, the center Q' of the shaft 27 of the abutment 3 is located at the trailing roller 7.
Since the position is shifted forward from the contact portion t, the abutment 3 is gradually tilted backward along the arcuate surface 21 and slope 22 of the movable body 2 due to the pressure of the companion roller 7. When the accompanying roller 7 is raised together with the punch 5 after the cutting is completed, the roller 18 of the rocking body 17 pushes up the abutment 3 due to the air pressure of the cylinder 4, and it returns to its original position. As described above, in the present invention, the end face of the cut-off part does not rub against the abutment after the middle stage during cutting of the grained material, and the abutment gradually loosens and separates from the cut-off part in the latter stage. Since the abutment is inclined so that the cut-off part can be easily removed, the end face of the cut-off part will not be damaged as if it were gouged out, which is a remarkable effect in obtaining a precision product.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a cross-sectional view of the trout cutting machine seen from the side, FIG. 2 is a plan view excluding the punch holder, etc., and FIG. 3 is a side view showing the attachment part of the movable body. Figure 4 is a cross-sectional view of a part of the Nada cutting machine seen from the side during cutting of bar materials, and Figure 5 is a sectional view of a part of the Nada cutting machine during cutting of bar material, and Figure 5 is a die, punch, bamboo material, movable body, abutment, and accompanying material during cutting of bamboo material. FIG. 6 is a side view showing the relationship of rollers and the like in the moving order of solid lines, dashed-dotted lines, and dashed-dotted lines. FIG. 6 is an enlarged sectional view of the abutment seen from the side. 1... Cylindrical die, 2... Movable body, 3...
...Abutting, 5...Punch, 6...Punch holder
, 7... Accompanying loaf -, 20... Joint surface against which the movable body abuts, 21... Arc surface, 22
... Slope, 23 ... Mounting part, 24 ...
...Guide groove, 25...Top of guide groove, 26
...Bottom, 27...Axis, 30...
...Engagement piece, 32...Contact surface, 34...Curved surface,
35...Engagement part. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] 1. A movable body 2 is provided in front of the cylindrical die 1 so as to be adjustable back and forth, and an abutment 3 from which a contact surface 32 with the bar material A protrudes from the rear end of the movable body is movable up and down and is movable upward. The holder 6 of the punch 5 is provided with a companion roller 7 that pushes down the abutment from the beginning of cutting the bar material, and the center part of the die is attached to the joint surface 20 with the abutment of the movable body. A circular arc surface 21 and a slope 22 are continuously formed below the height position P, and a pair of left and right mounting parts 23, 23 that sandwich the abutment are provided with guides that also extend up and down from the height position of the center of the die. In addition to providing the groove 24, the lower part 26 of the guide groove is formed in an arc shape with the center O being approximately the same as the arc surface 21 of the movable body. A bar shearing machine having shafts 27, 27 protruding to engage with guide grooves, and a curved surface 34 on the upper end of which a companion roller of a punch holder contacts and rotates. 2 A hook-shaped engagement piece 30 is provided protrudingly on the upper end of the joint surface 20 of the movable body 2, and an engagement part 35 that is hooked on the engagement piece is provided on the front end of the abutment 3 from the curved surface 34, and the accompanying roller 7 2. The shearing machine according to claim 1, wherein the engaging portion is disengaged from the engaging piece by pushing the abutment downward. 3 A roller 16 is attached to the tip of the rod 15 of the air cylinder 4 provided at the lower end of the movable body 2, and the roller 1
A substantially triangular oscillating body 17 is interposed between the bottom surface of the abutment 3 and the abutment 3, and the oscillation body is pivotally supported by the movable body, and a roller 18 attached to the tip of the oscillation body moves the abutment upward using air pressure from an air cylinder. The shearing machine according to claim 1 or 2, wherein the abutment is urged upward by pressing.