JPS6140422Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a scrap processing device that can easily and reliably shred notched scrap.

Generally, if the strip is left as it is after being rolled, quality defects due to cracks or dimensional variations will remain on both end faces (both ears) of the strip, or camber will occur in the longitudinal direction of the strip. I do things. Therefore, a process of cutting both ears of the strip is necessary to achieve the desired product size or quality, but since the strip is flowing continuously, the scraps of the sheared ears are also continuous or intermittent. This can cause problems and make post-processing difficult.
It is necessary to further shred (cut into small pieces).

Conventionally, as shown in Fig. 1, a method for shredding scrap is to install a scrap chopper b at a certain distance downstream of a rotary side trimmer a, and to connect the scrap chopper b and side trimmer a. A method was adopted in which a guide member c was disposed between the two ends of the strip d, and after shearing both ears of the strip d, the scrap e was cut into small pieces with a chopper b. However, in this method, the distance between shearing both ears and cutting the scrap e is long (a certain distance must necessarily be left due to the mechanical structure), so the scrap e is twisted when sheared. e is not guided properly to the tipper b and gets stuck inside the guide member c. Furthermore, even if the scrap e reaches the tipper b without getting stuck, if the scrap e is twisted 90 degrees and enters vertically, it will not get caught in the blade of the tipper b and will become impossible to cut. Therefore, when the above-mentioned phenomenon occurred, the entire line stopped, causing production to be inhibited.

Therefore, as a conventional measure against the above, as shown in Fig. 2, a chopper b is installed coaxially with the side trimmer a, that is, a chopper end plate b 1 is installed inside the axis f ₁ of the trimmer upper cutter a ₁ , and a cutter b ₁ is installed inside the axis f 1 of the trimmer upper cutter a 1. A method was also developed in which chopper lower cutters b _{and 2} were placed side by side inside the axis f _{and 2} of ₂ to simultaneously shear the ears of the strip d and shred the scrap e, thereby eliminating the grip of the scrap e. . However, in such a system, since the upper and lower cutters of the side trimmer a and the cutter b are provided on the same axis, the gaps x and 1 between the upper and lower cutters a ₁ and a ₂ of the side trimmer a are
Or, if the top gap y is made appropriate, the gaps x and 1 or the top gap y' between the upper and lower cutters b ₁ and b ₂ as the cutter b will become inappropriate (see Figure 3), and both should be made appropriate at the same time. This may damage the blades b ₁ and b ₂ or make it impossible to cut the scrap e. In addition, since edge shearing and scrap shredding are performed at the same time, cutter flaws g from the chopper lower cutter _b2 remain on both end faces of the sheared strip d, which may affect product quality or interfere with post-process processing. There were problems such as causing

Therefore, in order to solve this problem, recently,
A method has been proposed in which a notch is made at the end of the strip width before trimming, or a notch is made at the same time as trimming to facilitate scrap processing. You will need equipment to do so.

The present invention was developed in view of this point of view, and in order to pull the scrap which has been notched at a required interval in the scrap feeding direction at the tip end in the scrap feeding direction and divide it at the notch at the tip end in the scrap feeding direction, the upper pinch roll is used. The present invention is characterized by the provision of different speed pinch rolls in which the circumferential speeds of the rolls and the lower pinch rolls are different.

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

A trimmer upper cutter 2 is attached to the trimmer frame 1 to shear both width ends of the strip P in the longitudinal direction of the strip.
Attach the trimmer lower cutter 3, and install notchers 4 coaxially with the trimmer lower cutter 3 to insert notches into both ends of the strip P.

Trimmer upper and lower cutters 2 and 3 of trimmer frame 1
A guide 5 for guiding the scrap generated by the shearing of both ends of the strip P is disposed downstream of the strip P, and a scrap separation device 6 is disposed downstream of the guide 5. The scrap separating device 6 is comprised of a lower roll 7 and an upper pinch roll 9 which can be moved up and down by a fluid pressure cylinder 8, and the peripheral speeds of the upper and lower pinch rolls 9 and 7 are different. Further, the upper pinch roll 9 may be provided with protrusions on its circumference so that it can easily pinch the scraps S.

In the figure, 10 is a scrap chute that slides the scraps down, and 11 is a scrap conveyor that carries the scraps out of the line.

Next, the operation of the present invention will be explained.

As shown in FIGS. 5 and 6, the scrap P is sheared at both width ends by the trimmer's upper and lower cutters 2 and 3, and at the same time is notched by the notcher 4.
can be inserted. The depth of this notch N is set to such an extent that the scrap S does not fall apart while being fed. According to actual machine tests, the optimal notch depth is 60 to 95% of the board thickness.

The scrap S, which has been sheared and notched N, is sent from the guide 5 to the scrap separation device 6,
Let the circumferential speeds of the upper and lower pinch rolls 9 and 7 be V ₁ and V ₂ , and V ₂ > V ₁ and V ₂ = V ₁ + ΔV (ΔV is the difference in circumferential speed between the upper and lower pinch rolls 9 and 7). shall be. or,
It is assumed that a rolling force _P1 is applied to the scrap S by the upper and lower pinch rolls 9 and 7. (See Figure 7).

When the notch N of the scrap S comes between the upper and lower pinch rolls 9 and 7 and the scrap S in front of the notch N is pinched between the upper and lower pinch rolls 9 and 7, the lower pinch roll 7 Since the circumferential speed V ₂ is higher than the circumferential speed V ₁ of the upper pinch roll 9, as shown in FIG. = pulled by the force of KΔV, notch N
expands. Here, K is the rolling force P ₁ and the scrap S
is a constant determined by the friction coefficients of the upper and lower pinch rolls 9 and 7.

In addition, the scrap _S in front of the notch N is
The force acting on the center of rotation of the lower pinch roll 7 is P ₁ θ, and the force acting on the scrap S and the lower pinch roll 7 is P 1 θ.
The frictional force acting between the scrap S and the lower pinch roll 7 is P ₁ θμ
P ₁ ′θ, which is a combination of P ₁ θ and P ₁ θμ, acts on the top of the notch N, generating a moment M, and the portion of the scrap S in front of the notch N is pulled by the moment M, and the notch N expands.

As mentioned above, a force is applied to the scrap S in the area sandwiched between the upper and lower pinch rolls 9 and 7 due to the circumferential speed difference and moment to enlarge the notch N, and the downstream side of the notch N is The scrap S is pulled and divided. Scrap S notch N
The connected portion at the top is easily broken due to advanced work hardening, and by pulling with the upper and lower pinch rolls 9 and 7, the most advanced scrap S is easily separated. The divided scrap S slides down the scrap chute 10 and is conveyed out of the line from the scrap conveyor 11.

In the embodiment of the present invention, the case where the strip P is sheared and the notch is inserted at the same time has been described, but it can also be used when the strip P is sheared and then sheared, and other modifications may be made without departing from the gist of the present invention. Of course, various changes may be made.

According to the scrap processing device of the present invention, it is possible to easily divide the scrap by just pulling it, so it can produce various excellent effects such as making the work easier and faster.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are explanatory diagrams of the conventional example, and A
is a front view, B is a side view, C is a plan view, Fig. 3 is an explanatory diagram of the top gap and gap, Fig. 4 is an explanatory diagram of the present invention,
Fig. 5 is an explanatory diagram of the state in which both width ends of the strip are sheared and a notch is inserted, Fig. 6 is a plan view of Fig. 5,
FIG. 7 is an explanatory diagram of the principle by which scrap is divided. In the figure, 1 is the trimmer frame, 2 is the trimmer upper cutter, 3 is the trimmer lower cutter, 4 is the notcher, 6 is the scrap separation device, 7 is the lower pinch roll, 9
indicates the upper pinch roll.

Claims (1)

[Scope of utility model registration request] Since the scrap notched at the required intervals in the scrap feeding direction is pulled at the tip in the scrap feeding direction and divided by the notch at the tip in the scrap feeding direction, there is a difference in the roll circumferential speed between the upper pinch roll and the lower pinch roll. A scrap processing device characterized by being provided with pinch rolls at different speeds.