JPH0159058B2 - - 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 connecting rod 18 that is fitted into this eccentric cam 17 and swings.
is pivoted to a hammer mounting member 20 that is vertically guided by a guide 19 formed on the upper part of the frame 5, and a continuous straight line sent from the second pinch roll machine 3 is attached to the lower surface of the hammer mounting member 20. There is a hammer 22 which is mounted so as to be movable parallel to the direction of movement of the material T and is biased backward in the direction of movement of the continuous straight material T by a spring 21. A cutter mounting block 6 that slides is provided,
A movable member 8 is mounted on the cutter mounting block 6 so as to be guided so as to be movable up and down, is lifted up by a spring 10, and is provided with a movable cutter 9 on one side, which is lowered by being struck by the hammer 22. In addition, a fixed cutter 7 having a hole 7a through which the straight member T passes and a male thread 7b cut on its outer periphery is provided so as to come into sliding contact with the movable cutter 9. The above straight member T
An adjustable linear dimension setting stopper 24 is attached to the horizontal bar 23 extending in the direction of movement of the straight member T. The cutter mounting block 6 contacts a bracket 26 provided to guide the rod 23.
A stopper 27 is provided for regulating the movement stroke of the straight member T, and a stopper 27 is provided for regulating the movement stroke of the straight member T.
In this case, the spring 28 that returns the cutter mounting block 6 to its original position biases the horizontal bar 23 in the direction of returning it.

Therefore, if the length A of the fixed length straight material T to be obtained by cutting the continuous straight material T formed by the straightening machine 1 is set, 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 straightener 1 passes through the hole 7a of the fixed cutter 7 and extends toward the linear dimension setting stopper 24, and the cut end surface presses against this stopper. Thereafter, the straight member T and the cutter mounting block 6 move together, and then the movable member 8 is 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. As a result, the hammer 22 also moves horizontally together with the movable member 8, and subsequently hits the stopper 27. When the horizontal movement of the block 6 stops, the movable member 8 comes down. ,
The straight material T is cut to a fixed length by the movable cutter 9 and the fixed cutter 7 without causing any deformation on the cut surface. After cutting is completed, the cutter mounting block 6 is returned to its original position by the force of the spring 28, and the movable member 8 is also returned to its original position by the spring 10 as the hammer 22 is raised. Thereafter, the straight member T is inserted into the hole 7a of the fixed cutter 7.
It extends again 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 U that was cut to length was found to have low straightness, scratches, and 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. 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 specified length, slipping occurs between the straight material T and the straight material T in the second pinch roll machine 3, causing the straight material T to curve into an arc shape. It was found that the ring-shaped flaw detection coil emitted erroneous flaw detection signals, and from this point as well, it became 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 is guided so as to be movable up and down, a movable cutter 9 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 is 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 sent. A cutting timing detecting device 11 for outputting the output is newly installed, and the fixed length cutting machine 4 is connected to the movable member 8.
The cutter mounting block 6 is moved in synchronization with the feeding speed of the straight material T by a roller 12 provided at the upper end and a cutting signal from the cutting timing detection device 11 attached to the cutting machine body frame 5 and returned to the original position. Block reciprocating means 13
and an inclined surface 14a which is attached to the cutter body frame 5 and has a wedge action that lowers the movable member 8 through rolling contact of the roller 12 when the cutter mounting block 6 is fed by the block reciprocating means 13. The fixed hammer 14 has a fixed hammer 14.

<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 a straight line machine 1 which has a large number of rotating pieces (not shown) that form a curved wire S into a straight line between pinch roll machines 2 and 3 to form a straight line T. a flaw detector 30 that continuously performs flaw detection on the straight material T between the machines 3 and 29;
A steady rest device 3 that completely suppresses the movement of the straight member T passing through the flaw detector 30 before and after the flaw detector 30
1 and 32, and a cutting timing detection device 11 that detects when the moving distance of the straight material T after each cut to a fixed length reaches a certain value A and outputs a cutting signal, and a third pinching roll machine 29. The structure includes the above-mentioned fixed-length cutting machine 33 for cutting the straight material T to a fixed length at the tip of the straight material T.

The flaw detector 30 has a ring-shaped magnetic detection coil (not shown) that is 1 mm larger in diameter than the straight member T, and uses the steady rest devices 31 and 32 to center the straight member T with high precision at 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 33 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. An upper lightweight presser free roll 11b is mounted on the free roll 11a so that it can be lifted freely, and the pinch roll machines 3 and 2 are placed between the free rolls 11a and 11b.
9, the rotation speed of the rotating measurement free roll 11a is detected by the rotary encoder 11c, and this detection signal is input to the cutting signal output circuit 11d to determine each standard length of the straight member T. The moving distance after cutting is calculated, and when it reaches a certain value A, the controller unit 34 outputs a cutting signal P.

The above-mentioned fixed length cutting machine 33 has a cutting machine main body frame 5
There is a cutter mounting block 6 that is guided reciprocally in the feeding direction of the straight material T, and this cutter mounting block 6 has a slit 6 extending vertically from the bottom surface.
A is cut, and a female thread cut on one side near the third pinch roll machine 29 has a hole 7a through which the straight material T is passed, and the edge of this hole 7a on the straight material T delivery side is connected to the cutting tooth. A fixed cutter 7 having a male thread cut on its outer periphery is screwed together and locked with a lock nut 41. There is a movable member 8 facing the cutting teeth of the fixed cutter 7 and guided to the cutter mounting block 6 so as to be movable up and down. A movable cutter 9 is provided which cuts the straight member T extending from the hole 7a of the cutter 7 in cooperation with the fixed cutter 7. This movable member 8 has a slit 8a inserted from the lower end thereof, and a straight member T passes through the slit 8a located above the slit 8a. The movable member 8 is lifted by a spring 10 when not cutting, and the movable cutter 9 is positioned above the fixed cutter 7.
An air cylinder device is installed. When this air cylinder device 13 moves the cutter mounting block 6 in the feeding direction of the straight material T, the roller 12 provided at the upper end of the movable member 8 The movable member 8 comes into contact with the inclined surface 14a at the lower end of the hammer 14 and rolls, thereby causing the movable member 8 to descend. The length cutting machine 33 is provided with a flaw removing device 35 below the cutter mounting block 6. This flaw removing device 35 detects the straight material T by the flaw detector 30.
When it is detected that there is a flaw in the straight member T and that part is cut, there is a removal rod 35a that is inclined from the side perpendicular to the straight member T and extends across the falling path, and the fixed length straight member with the flaw is removed. It is designed to selectively exclude U to the side.

In the air cylinder device 13, a piston rod head 13a is linked to the cutter mounting block 6 via a connecting link 36, and an electromagnetic cutter is actuated by a cutting signal P output from a controller unit 34 based on a command from the cutting timing detection device 11. By energizing the valve 37 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 38, and the cutter mounting block 6 is controlled by the speed controller 39 attached to the pipe 38. The feed movement is synchronized with the feed speed of the straight member T, and when the solenoid valve 37 is demagnetized, the valve state is changed and returned by a return spring attached to the valve, and the inside of the extension side cylinder chamber is released. At the same time as being opened to the atmosphere, compressed air is supplied into the cylinder chamber on the retiring side to return the cutter mounting block 6 to its original position.

Inclined surface 14a at the lower end of the fixed hammer 14
is a gently sloped surface 14a of about 15 degrees that descends as it goes in the feeding direction of the straight member T, and cooperates with the rolling contact of the roller 12 provided at the upper end of the movable member 8. It is designed to generate a wedge action that strongly pushes down. Reference numeral 40 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 carried out accurately, and if there is a flaw, that part is sent to the fixed length cutting machine 33 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 35a of the flaw removal device 35 attached to the cutter 33 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 40 and will be rejected to the side. The distance that the straight member T extends through the hole 7a of the fixed cutter 7 is:
(Protrusion distance of straight member T) Cutting time detection device 11
When the rotary encoder 11c detects without interruption and reaches a constant value A, the disconnection signal output circuit 1
A cutting command signal is input to the control unit 34 from 1d, and the solenoid valve 37 is energized by the cutting signal P output from the control unit 34, and the air cylinder device 13 is driven to retire, thereby moving the cutter mounting block 6 in the feeding direction of the straight material T. It will be moved in sync with. Therefore, when the cutter mounting block 6 moves in synchronization, the overhanging distance of the straight member T remains unchanged at the above-mentioned constant value A.
The standard length straight member that has reached a certain value A is designated by the symbol U. During the synchronized movement of the block 6, the roller 12 at the upper end of the movable member 8 moves against the inclined surface 1 of the fixed hammer 14.
4a and rolls, the movable member 8 is strongly pushed down by the fixed cutter 7, and the movable cutter 9 cooperates with the fixed cutter 7 to cut the straight material T without causing any deformation on the cutting surface. Therefore, the cut straight length U always has the above-mentioned accurate constant value A. When the cutting is performed, the rotary encoder 11c is reset to 0, and the overhang distance of the straight member T is started to be detected again, and the air cylinder device 13 is switched to expansion drive, and the cutter mounting block 6 is returned to its original position. As the roller 12 at the upper end of the movable member 8 moves away from the inclined surface 14a of the fixed hammer 14, the movable member 8 returns upward. 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 13, and
In the above embodiment, the air cylinder device is installed so that the cutter mounting block 6 is moved in synchronism with respect to 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 an adjustable manner. The configuration may be such that the air cylinder device is driven to retire once the tip is caught.

<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, the block reciprocating means is activated to move the cutter mounting block in synchronization with the feeding speed of the straight material, so that the overhanging distance of the straight material remains at a constant value, and the roller at the upper end of the movable member moves in the direction of movement of the cutter mounting block. The movable member is strongly pushed down by the fixed hammer installed above coming into contact with the inclined surface and rolling, and the lowering movable cutter and the fixed cutter work together to cut the straight material without causing any deformation at the cut surface. Since it cuts to a fixed length and does not stop the movement of the straight material like conventional methods, the feeding force of the pinch roll machine does not cause buckling load on the straight material, and therefore the straight material can be cut to a fixed length. Curving deformation may occur in the material, diameter expansion of the straight material may occur in the piece that forms a curved line into a straight line on a straight line machine, slipping scratches may occur on the straight piece on a pinch roll machine, or straight line forming on a straight line machine may occur. The cause of accuracy errors 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 pinching 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, 9...movable cutter, 10...spring, 11...cutting time detection device,
12... Roller, 13... Block reciprocating means, 14... Fixed hammer, 14a... Inclined surface having wedge action.

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;
A movable cutter 9 is provided at the lower end of the movable member 8 and cuts the straight material T together with the fixed cutter 7, and the movable cutter 9 is positioned above the fixed cutter 7. In the fixed-length straight material manufacturing device, which is equipped with a spring 10 that is lifted up, the moving distance after each cut of the straight material T to a fixed length is a constant value (A).
A cutting timing detection device 11 is newly installed, which detects this and outputs a cutting signal when the cutting time is reached. The above-mentioned cutting timing detection device 11 is attached from 5.
The cutter mounting block 6 is activated by the cutting signal of
a block reciprocating means 13 for moving the cutter in synchronism with the feeding speed of the straight material T and returning it to its original position; and a cutter mounting block 6 attached to the cutting machine main body frame 5 by the block reciprocating means 13.
and a fixed hammer 14 having an inclined surface 14a having a wedge action that lowers the movable member 8 through rolling contact of the roller 12 during feeding movement. Device.