JPS5946725B2 - Wire rod rotary cutting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary wire cutting machine that cuts twice during one rotation of a rotor.

As shown in FIGS. 1 and 2, the conventional cutting machine F of this type has two rotor shafts 3 and 4 arranged in parallel and rotatably supported by respective bearings. Axis 3
, 4 are fitted with spur gears 1 and 2 having the same number of teeth so as to be able to rotate integrally through meshing, and rotors 5 and 2 having the same diameter are mounted on each end shaft of both shafts 3 and 4. 6 was fitted, and cutting blades 7 were attached at two opposing positions dividing the circumferential surfaces of the rotors 5 and 60 into two equal parts.

Therefore, an external driving shaft (not shown) is attached to one rotor shaft 4.
The wire rod R was supplied between the rotors 5 and 6 at a speed approximately equal to the speed of the cutting blade T, while transmitting rotation from the rotors 5 and 6 to give uniform rotational motion in opposite directions to the rotors 5 and 6 on both shafts 3 and 4. In this case, it was only possible to cut the wire R into a certain length that equally divided the circumferences of the rotors 5 and 6 into two.

Therefore, when cutting the wire R to different lengths, it is necessary to use a separate set of rotors formed to match the diameter that allows cutting to the desired length.

As a result, it is necessary to always have a large number of cutting devices in which rotors of various diameters and spur gears corresponding to these diameters are unitized.

Furthermore, each time the wire length size is changed, the cutting device using the rotor and spur gear must be replaced for each unit, which requires time and effort, which poses a problem in that the cost of cutting the wire becomes high.

This invention was made to solve the above problems, and the rotary cutting machine of this invention has a driving shaft that performs a constant rotational motion, and one shaft that is arranged parallel to the driving shaft.
A pair of elliptical gears are fitted around the shaft, and the one shaft is configured to provide inconstant rotational motion in which the angular velocity periodically increases and decreases, and the one shaft and the other shaft arranged parallel thereto are provided with a pair of oval gears. A spur gear is fitted into the shaft, and the other shaft is configured to have a rotation direction opposite to that of the one shaft and to provide the same inconstant rotational motion as the one shaft, and a rotor is mounted on each of the one shaft and the other shaft. The cutting blade is fitted into each rotor to cut the wire into several lengths, and the cutting blade is fitted with a stop position.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

First, the configuration will be described. As shown in FIGS. 3 and 4, a driving shaft 8 and one shaft 9 are rotatably supported in parallel by respective bearings.

A pair of elliptical gears 11 and 10, which perform non-uniform rotational motion with periodically changing angular velocities, are fitted onto each of the two shafts 8.9 so as to be able to transmit transmission through meshing.

On the front side of the driving shaft 8, the other shaft 14 is rotatably supported by bearings so as to be parallel to the one shaft 9.

Spur gears 12 and 13 having the same number of teeth are fitted onto the intermediate shafts of both shafts 9 and 140 so as to be able to transmit transmission through meshing.

Furthermore, rotors 5 and 6 of the same diameter are attached to each end of both shafts 9 and 14.
is fitted.

At a plurality of locations on each circumferential surface of the double-ended disks 5 and 6, wire rods R are defined in such a manner that they pass through the respective axial centers in the radial direction and divide each disk surface into two equal parts. One rotor 5 is used to removably attach a cutting blade (not shown) for cutting each length.
The blade stop positions are A1, A2, and B1.

B2. C1, C2 and DieD2 are provided symmetrically.

Furthermore, the other rotor 6 has the same blade stop position As.
eA+ pBs -B4 -C3-C4 and B3
．． B4 are provided symmetrically.

Both of them are arranged so as to come into contact with each other while the rotors 5 and 601 are rotating, with the blade stop position Al tAs as a temporary reference point, and the rotary cutting machine E is constructed as a whole.

When cutting the wire R with the rotary cutting machine E having the above configuration, if a constant rotational motion is applied to the driving shaft 8, each rotation of the driving shaft 8 causes the elliptical gears 10 and 11 to rotate once as well. .

Therefore, the rotors 5 and 6 fitted on the shaft ends of both shafts 9 and 14 also make one rotation due to the meshing rotation of spur gears 12 and 13 having the same number of teeth on both shafts 9 and 14. I will do it.

In this case, both shafts 9 and 14 undergo inconstant rotational motion in which the angular velocity changes periodically at a rate of 2 cycles per rotation, as shown in FIG. Therefore, the coaxial rotors 5 and 6 also perform non-uniform rotational motion.

Therefore, as shown in FIG. 6, the blade stop position AI is temporarily set as the reference point on the 5°60 circumferential surface of the rotor.

A3 and the blade stop position A2- provided at its symmetrical position
When A4 reaches the cutting position, its circumferential speed W is the fifth
It is the lowest as shown in the figure.

Also, the blade stop position D1 of the rotors 5 and 6. D3 and its symmetrical position serve as the blade stop position D2. When D4 reaches the cutting position, its circumferential speed W becomes the highest as shown in FIG.

This temporarily sets the blade stop position to A1. A3 and A2. A4
If a cutting blade is attached to and the wire R is fed from the -blade side at a feed rate synchronized with the circumferential speed W of A1, A3 and A2, A4, the wire can be cut to the shortest wire length size.

Also, suppose the blade stop position is 1. Attach cutting blades to B3 and B2°B4, and similarly cut the wire R from one side to this Di.
eDa and B2. If it is fed at a feed rate synchronized with the D40 circumferential speed W, it can be cut to the longest wire length size.

For example, the number of wire rods R used as welding rods is 300.350, at a rate of 2 for every 5,601 rotations of the rotor.

When cutting into four types of line length sizes of 400.450 m, the ratio of the maximum and minimum angular velocities of the axes 9 and 140 is 1.5, that is, the minimum is 0.8165 and the maximum is 1.5 as shown in FIG. Each oval gear 10 varies in the range of 2247
, 11 is selected as follows.

In other words, when the driving shaft 8 rotates at a constant speed, the driving shaft 80
During one rotation, the elliptical gears 10 and 11 also rotate once, and the rotor 5
, 6 also rotate once.

Therefore, if we consider the time T required for one rotation of the rotors 5 and 6 and the angle θ within a range of 180 degrees, then each blade stop position A1. A3-
No matter what position you take between A2 and A4, it increases and decreases including the lowest and highest angular velocities, so 180
degree (half rotation) K The time required is the same at any position T, /2
becomes.

As a result, for example, when cutting the wire rod R into 300 mm,
At this time, the blade stop positions A1, A3, and A2. A4
The circumferential velocity W of is 0.8165V, as shown in FIG.

Since it is necessary that the circumferential speed of the cutting blade 7 and the feeding speed of the wire R at the point where the wire is cut is approximately equal, the wire R
The feed rate is also selected to be 0.8165V.

Therefore, one blade stop position A1 1A3 passes through the cutting location, and the other blade stop position A2. The time required for A4 to arrive is T1/2 as described above.

This results in 0.8165VXT1/2:300y++m (however,
v: average circumferential speed of the rotor), and a welding rod of 300 degrees can be obtained.

Similarly, when cutting a wire rod to 350 mm, move the cutting blade to the blade stop position B1. If provided at B3 and B, , B4,
Since the circumferential velocity at this position is 0.9522V, it becomes 0.9522VXT1/2'':35orrarL, and a welding rod of 350TIB is obtained.

In addition, when cutting a wire rod at 400rrantlC, if the cutting blade is installed at the blade stop positions C0, C3, C2, and C4, the circumferential speed at these positions is 1.0882V, so 1.0882VXT1/2"5400tra. Thus, a 400m long welding rod is obtained.

When cutting a wire rod R450 mm, if the cutting blade is installed at the blade stop positions D1, D3, and D2 *D4, the circumferential speed at this position is 1.2247V, so it is 1.2
247VXT1/2 loss is 450mm, and a 450m welding rod is obtained.

As explained above, the present invention enables the operation of simply changing the mounting position of the cutting blade using one cutting device.
Since the cutting length of the wire rod can be selected from several values, and the operation of changing the position can be performed quickly and easily, a significant reduction in equipment costs can be expected, as well as a reduction in the cost of cutting the wire rod. It has excellent effects such as:

[Brief explanation of drawings]

Fig. 1 is a longitudinal side view of a conventional rotary cutting machine, Fig. 2 is a front view thereof, Fig. 3 is a longitudinal side view of a rotary cutting machine according to the present invention, and Fig. 4 is an explanatory diagram of an elliptical gear in the cutting machine. , FIG. 5 is a graph showing the relationship between the rotor angle and its circumferential speed in the same cutting machine, and FIG. 6 is an explanatory diagram showing the blade stop position of the rotor in the same cutting machine. 5.6... Rotor, 7... Cutting blade, 8... Driving shaft, 9... One shaft, 10.11... Elliptical gear, 12.
13... Spur gear, 14... Other shaft, A1tA2~D
3tD4...Blade stop position.

Claims (1)

[Claims] 1 A pair of elliptical gears are fitted onto a driving shaft that performs uniform rotational motion and one shaft placed parallel to the drive shaft, giving non-uniform rotational motion in which the angular velocity periodically increases and decreases to the one shaft. A pair of spur gears is fitted onto the one shaft and the other shaft arranged parallel to the one shaft, and the other shaft is equipped with a gear whose rotational direction is opposite to that of the one shaft and which is the same as the one shaft. The wire rod is configured to give uniform rotational motion, rotors are fitted onto each of the one shaft and the other shaft, and each rotor is provided with a stop position for a cutting blade for cutting the wire into several lengths. Features: Rotary cutting machine for wire rods.