JPS6361100B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Technical Field> The present invention relates to a fixed-length straight material manufacturing apparatus that straightens a winding wire using a straightener and then cuts the same into a fixed length using a fixed-length cutter.

<Prior Art> A conventional straight length manufacturing apparatus is shown in FIG. This device unwinds the wire rod S wound around the winding device 15 and feeds it by the first pinching roll machine 2 and the second pinching roll machine 3. The curved wire S is formed into a straight line by the straightening machine 1 to form a straight material T, and then the second pinching roll machine 3
A fixed length cutter 4 installed at the tip of the cutter is used to cut to a fixed length.

This fixed length cutting machine 4 has an eccentric cam 17 rotated by a motor 16 on the upper part of the frame 5.
A continuous rod 18 that is fitted into this eccentric cam 17 and swings.
is pivotally attached to a hammer mounting member 20 that is vertically guided by a guide 19 formed on the upper part of the frame 5. There is a hammer 22 on the lower surface of the hammer mounting member 20, and this hammer 22 is
It is movable parallel to the moving direction of the continuous straight material T sent from the second pinch roll machine 3, and is urged backward in the moving direction of the continuous straight material T by a spring 21. A cutter mounting block 6 is provided at the bottom of the frame 5. This cutter mounting block 6 is adapted to slide in the direction of movement of the straight member T. A movable member 8 is provided so as to be guided by the cutter mounting block 6 in a vertically movable manner.
It is lifted by a spring 10 and has a movable cutter 9 on one side. And the movable member 8
is struck by a hammer 22 and descends. The fixed cutter 7 has a hole 7a through which the straight member T passes, and has a male thread 7b cut on its outer periphery. The fixed cutter 7 is replaced by a movable cutter 9.
It is designed to come into sliding contact with the The cutter mounting block 6 has a horizontal bar 23 extending in the direction of movement of the straight material T, and a freely adjustable linear dimension setting stopper 24 that comes into contact with the cutting end surface of the straight material T is attached to this horizontal bar 23. ing. Further, a stopper 27 is provided on the horizontal bar 23. This stopper 27 is the entire frame 2
The straight member T of the cutter mounting block 6 comes into contact with a bracket 26 that guides a horizontal bar 23 provided at the cutter mounting block 6, thereby regulating the movement stroke of the straight member T. Furthermore, the horizontal bar 23 is biased by a spring 28 for returning the cutter mounting block 6 to its original position in the direction of returning the horizontal bar 23.

Therefore, if the length of the regular straight material T to be obtained by cutting the continuous straight material T formed by the straightening machine 1 is A, then the distance from the fixed cutter 7 can be determined by adjusting the linear dimension setting stopper 24. Take A and operate the entire device. Then, the continuous straight material T formed by the straightening machine 1 passes through the hole 7a of the fixed cutter 7 and extends toward the linear dimension setting stopper 24, and when the cut surface of the tip presses this stopper, it becomes Thereafter, the straight member T and the cutter mounting block 6 move together. Then, the movable member 8 comes to be positioned below the hammer 22, which moves up and down at high speed using the motor 16 as a drive source, and is pushed down, and accordingly, the hammer 22 also moves horizontally together with the movable member 8. . Subsequently, the stopper 27 collides with the block 6.
When the horizontal movement of the movable member 8 stops, the movable member 8 comes down and cuts the straight material T between the movable cutter 9 and the fixed cutter 7.
This allows cutting to a fixed length without causing any deformation on the cut surface. After cutting, the cutter mounting block 6 returns to its original position due to the bias of the spring 28, and the movable member 8 also moves to the hammer 2.
2 is returned to its original position by the spring 10. From now on, the straight member T is inserted into the hole 7 of the fixed cutter 7.
It extends again from a toward the linear dimension setting stopper 24, and the above-mentioned cutting is repeated.

However, the straight length U obtained by the above-mentioned straight length straight material manufacturing apparatus has extremely high straightness immediately after leaving the straightening machine 1; The straight material T cut to length was found to have low straightness, scratches, or deformation.

Therefore, when the inventor investigated the cause, it was found that the stopper 27 collides with the bracket 26 and the horizontal movement of the block 6 is stopped, causing the pinch roll machines 2 and 3 that have been feeding continuous straight material T until now to The feeding force due to the rotation of the straight member T
It was found that this was caused by a thrust (buckling load) acting on the portion fed out from the roll machine. That is, when the horizontal movement of the block 6 stops, a buckling load is generated on the straight member T, and the straight member T is moved between the straight machine 1, the roll machines 2 and 3, the fixed cutter 7, and the stopper 24, respectively. Curving deformation may occur in an arc shape, diameter expansion may occur in the middle of the several pieces of the straight line machine 1, slipping scratches may occur on the second pinch roll machine 3, and the straight line forming accuracy of the straight line machine 1 may occur. It was the cause of the confusion.

In addition, in order to eliminate the above drawback, stopper 2
There may be an idea to remove block 6 so that the horizontal movement of block 6 does not stop, so that thrust does not act on the part of the straight material T sent out from this roll machine, but if you do that, block 6 As the horizontal movement of the cutter mounting block 6 increases, the amount of hitting by the hammer 22 of the cutter mounting block 6 increases.
Then, while the cutter mounting block 6 was not returned to its original position by the spring 28, the hammer 22, which moves up and down at high speed, descended twice and thrice, causing multiple strikes by the hammer 22, and an extremely short piece of paper was cut off. Many will be cut off. That is,
Since the fixed length cutting machine 4 having the above configuration requires the stopper 27 to prevent the stripper member from being cut, it is not possible to solve the above drawback by simply removing the stopper 27. ,
Cannot be hired.

On the other hand, the above-mentioned conventional fixed-length straight material manufacturing apparatus had the inconvenience of visually inspecting each straight material T after cutting it to a fixed length, so the inventor installed a swing stop device at the front and rear. We attempted to completely suppress the deflection of the straight material T by preparing for it, and to continuously detect the straight material T using a flaw detector to remove the straight material T in the flaws that were cut to a regular length when it fell. When the straight material T stops moving during cutting to a fixed length, the straight material 8 slips between itself and the straight material T in the second pinch roll machine 3 and curves into an arc. It has been found that the flaw detection coil of this type emits erroneous flaw detection signals, and from this point as well, it has become necessary to eliminate the above-mentioned drawbacks.

<Object of the invention> The present invention was devised in view of the above points, and
By preventing the buckling load from acting on the part of the straight material fed out from the second pinch roll machine when cutting to a fixed length, the straightness of the straight material, which can be obtained with extremely high accuracy with the straight machine, is reduced. The present invention provides an apparatus for manufacturing a straight material having a fixed length, which is equipped with a fixed length cutting machine capable of cutting a fixed length straight material without cutting.

<Structure of the Invention> The fixed length straight material manufacturing apparatus of the present invention includes a straightening machine 1 and a first pinching roll machine 2 which is arranged before and after the straightening machine 1 and feeds the continuous wire S to be passed through the straightening machine 1. and a second pinching roll machine 3, and a fixed length cutting machine 4 for cutting the straight material T to a fixed length after being straight-formed by the straightening machine 1 and sent to the tip of the second pinching roll machine 3. The machine 4 includes a cutter mounting block 6 that is guided to the cutting machine body frame 5 in a reciprocating manner in the feeding direction of the straight material T, and a hole 7a that is attached to the cutter mounting block 6 and through which the straight material T passes.
a fixed cutter 7 having a hole 7a whose edge is a cutting tooth; and the cutter mounting block 6.
a movable member 8 that is guided so as to be vertically movable; a movable cutter 9 that is provided at the lower end of the movable member 8 and cuts the straight material T in cooperation with the fixed cutter 7; and the movable cutter 9. This movable member 8 is positioned above the fixed cutter 7.
In the fixed length straight material manufacturing apparatus, which is equipped with a spring 10 that is lifted up, when the moving distance of the straight material T after each fixed length cutting reaches a constant value A, this is detected and a cutting signal is output. A cutting timing detection device 11 is newly installed, and the fixed length cutting machine 4 has a
a is formed so as to be an inclined surface that descends in the direction of movement of the straight material T, and is attached to the cutter body frame 5, and the cutter mounting block 6 is connected to the straight material T by a cutting signal from the cutting timing detection device 11.
a block reciprocating means 12 that moves in synchronization with the feed speed of the cutting machine and returns it to its original position; and a block reciprocating means 1 that is attached to the cutting machine main body frame 5.
2, the roller 13 is capable of lowering the movable member 8 while rolling against the inclined surface 8a during the feed movement of the cutter mounting block 6, and this roller 13 is capable of lowering the movable member 8 when the movable member 8 returns. It is characterized by the fact that it can be lifted up.

<Example> Hereinafter, a fixed length straight material manufacturing apparatus according to an example of the present invention will be described with reference to FIGS. 1, 2, and 3. Note that members that are the same as those in the prior art are designated by the same reference numerals.

First, to explain the configuration, this device includes a first pinching roll machine 2, a second pinching roll machine 3, and a third pinching roll machine 29, which unwind and feed the wire S wound around the winding device 15. There is. Between pinch roll machines 2 and 3,
A straight material T is formed by forming a curved wire material S into a straight line.
There is a linear machine 1 having a large number of rotating pieces (not shown). Pinch roll machine 3, 2
9, there is a flaw detector 30 that continuously tests the straight material T, and a flaw detector 30 is installed before and after this flaw detector 30.
Steady rest devices 31 and 32 completely suppress the movement of the straight material T passing through the straight material T, and detect when the moving distance of the straight material T after each cut to a fixed length reaches a constant value A and output a cutting signal. There is a cutting time detection device 11. Further, in front of the third pinching roll machine 29, there is the above-mentioned fixed length cutting machine 4 for cutting the straight material T to a fixed length.

The flaw detector 30 has a ring-shaped magnetic detection coil (not shown) that is 1 mm larger than the diameter of the straight member T, and uses the steady rest devices 31 and 32 to accurately align the straight member T to the center of the coil without eccentricity. In the state of insertion and movement, if there is a flaw in the straight member T, the flaw can be detected by a magnetic change occurring in the coil. Each of the above-mentioned steady rest devices 31 and 32 is made up of three steady rests that can be simultaneously moved in equal strokes toward the straight member T by a gear mechanism (not shown), and that have a phase difference of 120° in a plane in the diametrical direction of the straight member T. Free roller 31
A, 32a are provided as a pair on both sides of the frames 31b, 32b, and three steady rest free rollers 31a, 32a on each side hold down the straight member T. The cutting timing detection device 11 outputs a cutting signal to the fixed length cutting machine 4 when the dimension of the straight material T sent out before the fixed cutter 7 reaches a certain value A, and is used for measuring the lower side. The upper lightweight free roll 1 for the presser foot is attached to the free roll 11a.
1b is mounted so that it can be lifted freely, and pinch roll machines 3 and 29 are mounted between both free rolls 11a and 11b.
The rotation speed of the rotating measuring free roll 11a is detected by the rotary encoder 11c, and this detection signal is input to the cutting signal output circuit 11d, and the straight member T is passed through the moving straight member T.
The moving distance after each cut to a fixed length is calculated, and when the distance reaches a certain value A, the controller unit 33 outputs a cutting signal P.

The fixed length cutting machine 4 has a cutter mounting block 6 on the cutting machine main body frame 5, which is guided reciprocally in the feeding direction of the straight material T. This cutter mounting block 6 has a slit 6a running vertically from the bottom surface.
is cut. Further, this cutter mounting block 6 has a female thread cut on one side near the third pinch roll machine 29, and a fixed cutter 7 is screwed into this female thread and locked with a lock nut 40. The fixed cutter 7 has a hole 7a through which the straight material T passes, and the edge of the hole 7a on the straight material T delivery side serves as a cutting tooth. A movable member 8 is guided to the cutter mounting block 6 so as to be vertically movable. This movable member 8 is in contact with the cutting teeth of the fixed cutter 7. A movable cutter 9 is provided on one side of the movable member 8. This movable cutter 9 has a slit 9a at its lower end, which matches the slit 8b of the movable member 8, and the upper edge of this slit 9a serves as cutting teeth. This movable cutter 9 is connected to the movable member 8
The straight member T extending from the hole 7a of the fixed cutter 7 is cut by the lowering of the cutter 7 in cooperation with the fixed cutter 7. The movable member 8 is a spring 10
When not cutting, the movable cutter 9 is positioned above the fixed length cutting 7. An air cylinder device 12 is attached to the cutting machine body frame 5, and serves as means for reciprocating the block. The upper end of the movable member 8 is an inclined surface 8a. This is because when the air cylinder device 12 moves the cutter mounting block 6 in the feeding direction of the straight material T, it comes into contact with the roller 13 attached to the upper part of the cutting machine main body frame 5 and causes the roller 13 to roll. This is because the movable member 8 descends. This roller 13 is attached so as to be lifted by the movable member 8 when the movable member 8 returns.

A flaw removing device 34 is attached to the fixed length cutting machine 4 below the cutter mounting block 6. This flaw removing device 34 detects flaws in the straight material T by the flaw detector 30. When a portion is cut, there is a removal rod 34a that is inclined from the side perpendicular to the straight material T and extends across the falling path, and selectively removes the damaged straight material U to the side. I'm starting to do that.

In the air cylinder device 12, a piston rod head 12a is linked to the cutter mounting block 6 via a connecting link 35, and an electromagnetic device is activated by a cutting signal P output from a controller unit 33 based on a command from the cutting timing detection device 11. By energizing the valve 36 and changing the valve state, compressed air from a compressor or an air cylinder (not shown) is supplied into the extension side cylinder chamber through the pipe 37, and the speed controller 38 attached to the pipe 37 controls the cutter mounting block 6.
The solenoid valve 30 is fed and moved in synchronization with the feeding speed of the straight member T, and when the solenoid valve 30 is demagnetized, the valve state is changed and returned by a return spring attached to the valve, and the extension side cylinder chamber is moved. is opened to the atmosphere, and compressed air is supplied into the cylinder chamber on the retiring side to return the cutter mounting block 6 to its original position.

The inclined surface 8a at the upper end of the movable member 8 is a gentle inclined surface of about 15 degrees that descends as it goes in the feeding direction of the straight material T, and rolls into contact with the roller 12 to force the movable member 8. It is designed to create a wedge action that pushes down on the surface. Reference numeral 39 denotes a receiving device for receiving straight length U without any flaws.

Next, we will discuss the effect.

When the entire device is driven, the wire S wound around the winding device 15 by the first pinch roll machine 2 is sent to the straightener 1, where it is pinched between a number of rotating pieces (not shown) and straightened. Molded in a straight line. This straight material T is then sent to the flaw detector 30 by the second pinching roll machine 3.
At this time, the vibration of the straight member T can be completely suppressed by the steady rest devices 31 and 32, so the flaw detector 3
0 indicates that the continuous flaw detection of the straight material T is performed accurately, and if there is a flaw, that part is sent to the fixed length cutter 4 by the third pinching roll machine 29 and passed through the hole 7a of the fixed cutter 7. When the straight material T is cut to length, the removal rod 34a of the flaw removal device 34 attached to the cutter 4 extends into the fall path of the straight material T cut to length below the cutter mounting block 6. It will not be received by the receiving device 39 and will be rejected to the side. The distance that the straight material T extends through the hole 7a of the fixed cutter 7 is determined by the rotary encoder 11c of the cutting time detection device 11 continuously detecting the overhanging distance of the straight material T, and when the distance reaches a certain value A, cutting is performed. A cutting command signal is input from the signal output circuit 11d to the control unit 33, and the cutting signal P output from the control unit 33 excites the solenoid valve 36, drives the air cylinder device 12 to retire, and moves the cutter mounting block 6 to the straight member T. This results in a synchronous movement in the feed direction of. Therefore, during the synchronized movement of the cutter attachment block 6, the overhanging distance of the straight member T remains unchanged at the constant value A, and the fixed length straight member that has reached the constant value A is designated by the symbol U. During the synchronized movement of the block 6, the inclined surface 8a at the upper end of the movable member 8 rolls into contact with the roller, so that the movable member 8 is strongly pushed down and the movable cutter 9 cooperates with the fixed cutter 7 to cut. The straight member T is cut without causing any deformation in the plane, and the cut straight member U always has the exact constant value A. Then, when the cutting is done,
The rotary encoder 11c is reset to 0 and begins to detect the overhanging distance of the straight member T again, and the air cylinder device 12 is switched to extension drive and the cutter mounting block 6 returns to its original position. After cutting is performed, the inclined surface 8a at the upper end of the movable member 8 is removed from the roller 13.
When the movable member 8 is lifted by the bias of the spring 10 and the air cylinder device 12 is switched to the retiring drive, the movable member 8 lifts the roller 13 and returns. Further, after the cutting is performed, the inclined surface 8 of the movable member 8
a is removed from the roller, the movable member 8 is lifted by the bias of the spring 10, and the air cylinder device 12 is switched to the retracting drive, so that the movable member 8
lifts the roller 13 and returns. Thereafter, by repeating the same operation, a high quality straight length U can be obtained.

<Modification> In the above embodiment, an air cylinder device is used as the block reciprocating means 12, and
In the above embodiment, the air cylinder device is installed so that the cutter mounting block 6 moves in synchronization with the straight member T when the air cylinder device is driven to retire, but it may be installed so that it is moved when the air cylinder device is driven to extend. Further, instead of the air cylinder device, a hydraulic cylinder device may be used, or a nut fixed to the cutter mounting block 6 may be screwed onto a screw shaft rotated by a motor.

As the cutting time detection device 11, a non-contact sensor consisting of a light emitting element and a light receiving element, or a contact sensor such as a limit switch is arranged under the air cylinder device of the above embodiment in a freely adjustable manner.
The arrangement may be such that when the sensor catches the tip of the straight member T, the air cylinder device is driven to retire.

<Effects of the present invention> As explained above, the fixed-length straight material manufacturing apparatus of the present invention detects the overhanging distance of the straight material extending through the hole of the fixed cutter of the fixed-length cutting machine using the cutting time detection device. Then, by operating the block reciprocating means and moving the cutter mounting block in synchronization with the feed speed of the straight material, the overhanging distance of the straight material remains constant, and the inclined surface at the upper end of the movable member The movable member is strongly pushed down by contact with the roller provided above in the direction, and the movable cutter provided on the movable member descends, causing even the slightest deformation in the cutting surface due to the cooperation with the fixed cutter. This machine cuts straight materials to a specified length without any friction, and does not stop the movement of the straight materials as in the past, so the feeding force of the pinch roll machine does not cause buckling load on the straight materials. Therefore, bending deformation may occur in the straight material, diameter expansion of the straight material may occur in the machine that forms a curved line into a straight line in a straightening machine, slipping scratches may occur in the straight material in the pinch roll machine, or The cause of deviations in the straight line forming accuracy of the straight line machine is eliminated, and high quality straight lengths can be obtained. In addition, since the movement of the straight member is not stopped, the straight member does not undergo any bending deformation. Therefore, as shown in the above embodiment, by providing a steadying device at the front and rear to completely suppress the deflection of the straight member, It becomes possible to install a flaw detector that continuously detects flaws in straight materials.

[Brief explanation of drawings]

FIG. 1 is an overall front view of a fixed-length straight material manufacturing apparatus according to an embodiment of the present invention. FIG. 2 is an enlarged front view of the main parts of the above embodiment. FIG. 3 is a - sectional view in FIG. 2. FIG. 4 is an overall front view of a conventional fixed length straight material manufacturing apparatus. S... Continuous wire rod, T... Straight rod, U... Straight rod in the part where the overhang distance becomes a constant value A and is cut to a specified length, 1... Straight line machine, 2... First pinch roll machine, 3 ...Second pinch roll machine, 4...
Standard length cutting machine, 5... Cutting machine main frame, 6...
Cutter mounting block, 7...Fixed cutter,
7a... Hole, 8... Movable member, 8a... Inclined surface having wedge action, 9... Movable cutter, 10... Spring, 11... Cutting time detection device, 12... Block reciprocating means, 13... …roller.

Claims (1)

[Claims] 1. A straightening machine 1, a first pinching roll machine 2 and a second pinching roll machine 3, which are arranged before and after this straightening machine 1 and feed the continuous wire S to be passed through this straightening machine 1; It is equipped with a fixed-length cutting machine 4 that cuts the straight material T to a fixed length after being straight-formed by the straightening machine 1 and sent to the tip of the second pinching roll machine 3. a cutter mounting block 6 which is guided reciprocally in the feeding direction of the straight material T, and a hole 7 which is attached to this cutter mounting block 6 and through which the straight material T passes.
a fixed cutter 7 having a hole 7a whose edge is a cutting tooth; a movable member 8 guided to the cutter mounting block 6 in a vertically movable manner;
This movable member 8 is equipped with a movable cutter 9 that cooperates with the fixed cutter 7 to cut the straight material T, and the movable member 8 is moved so that the movable cutter 9 is located above the fixed cutter 7. In the fixed length straight material manufacturing apparatus equipped with a lifted spring 10, the moving distance after each fixed length cutting of the straight material T is a constant value A.
A cutting timing detection device 11 is newly installed, which detects this and outputs a cutting signal when the upper surface 8 of the movable member 8 is cut.
a is formed so as to be an inclined surface that descends in the direction of movement of the straight material T, and is attached to the cutter body frame 5, and the cutter mounting block 6 is connected to the straight material T by a cutting signal from the cutting timing detection device 11.
a block reciprocating means 12 that moves in synchronism with the feed speed of the cutter and returns it to its original position; and a block reciprocating means 12 that is attached to the cutting machine main body frame 5.
roller 13 that can lower the movable member 8 while rolling against the inclined surface 8a when the cutter mounting block 6 is fed; A fixed length straight material manufacturing device characterized by being capable of being lifted.