JPS63134108A - Automatic cutting device for surface flaw of bar wire material - Google Patents

Abstract

PURPOSE:To promote the stability of quality and its improvement in automatically cutting a surface flaw, by providing die guides, which form an internal diameter almost equal to the diameter of a workpiece cutting portions cutting tools interfere, and three sets or more of the respectively separate longitudinally movable cutting tools which form their point ends into a recessed cutting edge being displaced in the axial direction around the workpiece. CONSTITUTION:A flaw detector 3 detects depth of a flaw and its position (distance and angle) on a strand wire 2, which passes through die guides 8A-8C, to be respectively transmitted as an electric signal. A device, which synchronizes these three signals, feeds an operation instruction to tools 10A-10C provided with a space of 120 deg. further with a space in the lengthwise direction. And the device, which cuts a flaw in a part P by actuating the tools 10C and 10A while a flaw in a part P1 and a part P2 by respectively actuating the tools 10A and 10C, 10C and 10B, always fixes an operative range (depth of cut, cutting angle) of each tool 10A-10C. In this way, the device, which can prevent a workpiece from its deflection when the workpiece is cut, enables automatic cutting of stable quality to be performed.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is an automatic method for removing surface flaws from a wire or rod, which can be stably removed without horizontal wobbling of the workpiece. This invention relates to a cutting device.

(Prior technology) When manufacturing special steel bars and wire rod products such as spring steel, bearing steel, stainless steel, etc., before hot rolling, surface flaws on the material are thoroughly removed, and then the material is hot rolled and coiled. It has become

However, it is unavoidable to completely remove the flaws in the material, and therefore, the surface of the coil after hot rolling is partially dotted with flaws with a maximum depth of about 0.2U. Surface defects may need to be removed.

Conventionally, as a means of removing such scratches, manual grinder maintenance was proposed as disclosed in Japanese Patent Publication No. 59-50453 and Japanese Patent Application Laid-open No. 59-50.
There are methods and devices proposed in various publications such as Japanese Patent Publication No. 6-114618, Japanese Patent Publication No. 58-24201, and Japanese Patent Application Laid-Open No. 59-142054.

(Problems to be Solved by the Present Invention) Manual maintenance involves untying the cold coil and visually inspecting the entire four circumferences of the rod or wire, which is extremely inefficient and undesirable in terms of efficiency, resulting in high labor costs. There is a disadvantage of uploading it to a large width.

For this reason, the above-mentioned Japanese Patent Publication No. 59-50453, which is considered to be the most promising means for labor saving and automation, has the following drawbacks.

In other words, (1) The cutting force is received by the roller (theoretically at one point), and it is necessary to align the tip position of the cutting tool with the center of rotation of the roller of the receiver in the running direction. etc., making this adjustment extremely difficult and causing fluctuations in cutting clearance, especially when working with thin materials.

(2) Since the workpiece is supported by a roller at one point (one point on the same circumference), the workpiece may oscillate laterally in the cutting direction when cutting surface flaws, resulting in surface flaws being left behind or cutting. This may cause problems with the surface shape.

In addition, other known means have the disadvantage that the cutting area inevitably increases, which greatly reduces the yield.

The present invention has been made to solve the above problems.

(Means for Solving the Problems) The present invention uses a rod or wire rod such as a steel bar or a wire rod as a workpiece, and the workpiece is placed on a traveling path in which the workpiece is run in the longitudinal direction. A flaw detector is provided to detect the position of flaws in the direction and longitudinal direction, and a traveling speed detector of the workpiece is also provided, and the cutting tool is operated based on flaw information from the flaw detector and speed information from the traveling speed detector. It is intended to efficiently remove only the flawed part of the workpiece, and has a minimum inner diameter approximately equal to the diameter of the workpiece, and the part that the cutting tool interferes with when heading toward the workpiece. A die guide with a notch is provided at intervals in the longitudinal direction of the workpiece, and a cutting tool having a concave cutting edge at a position corresponding to the die guide is provided independently toward the workpiece. The cutting tool is arranged so as to be able to move forward and backward, and the cutting tools are arranged around the workpiece and are arranged in three or more sets offset in the axial direction of the workpiece to enable cutting around the entire circumference. be.

(Example) Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

Fig. 1 is an explanatory diagram showing the overall configuration of the present invention, Fig. 2 is a front view showing details of its main parts, Fig. 3 is a partial side view of Fig. 2,
Figure 4 is a sectional view taken along the line AA in Figure 2, Figure 5 (A) is an enlarged view of section a in Figure 2, and Figure 5 (B) is the BB [
It is an i-side view.

FIG. 1 schematically shows the overall configuration of the present invention.

Reference numeral 1 denotes a supply stand, and a wire 2, which is a workpiece mounted in a coil shape on this stand, is wound with a flaw detector 3 such as a known rotating probe type vortex flaw detector in the process of being wound up by a winder 100. The surface flaws are detected.

Further, the running speed of the wire 2 is detected by a speedometer 4, and the control device 5 controls the driving device 7 (of the cutting machine 6).
7A, 7B, 7C) can be controlled.

That is, the position of the flaw in the circumferential direction and longitudinal direction of the workpiece strand 2 is detected by the flaw detector 3, and the flaw depth signal of the detection signal is used to detect the position of the flaw applied in advance to the cutting tool of the cutting machine 6. By controlling the cutting tool drive devices t7A to 7C in accordance with the calculated cutting speed and the advancing/retracting timing of the cutting tool, the cutting tool placed in the longitudinal direction of the traveling path of the wire 2, which is the workpiece, cuts the flaws. Only the parts are cut and removed.

The feature of the present invention is that three or more sets of cutting tools combined with die guides are provided to enable cutting of the entire circumference of the wire. In other words, three or more sets of cutting tools that move forward and backward independently are installed on a die guide in which the part where the cutting tool interferes is notched so that the cutting tool can go in and out toward the workpiece, and the cutting tool can be moved in and out of the workpiece. It is possible to cut.

The details of the cutting machine 6 are shown by referring also to FIG.
, 8C are provided.

The 8 dice guides, 8B, and 8C are represented by 8 dice guides in Figure 5 (A) and (B included Figure 6 (person)).

As shown in (B), it has a minimum inner diameter that is almost equal to the diameter of the work piece strand 2, and the part where the 10 cutting tools interfere is cut out so that the 10 cutting tools can move forward and backward toward the workpiece. ing. The die guide 8A is presser plate tsu and pole 1-
24 to the die box 9, and further fixed to the support arm 18 with bolts 6 and nuts 26. As for the material of the eight die guides, it is preferable to use cemented carbide or the like, similar to the wire drawing die.

On the other hand, the cutting tools IOA, IOB, and IOC are driven by telescopic cylinders 7A and 7B that face the workpiece guided within the die guides 8A, 8B, and 8C.

The cutting tools IOA, IOB, and IOC are arranged at intervals in the feeding direction of the material 2, and are arranged at equal intervals in the circumferential direction. It is provided every 120 degrees. Note that when the number of cutting tools is 4, the cutting tools are provided at (4) degree intervals, and when the number of cutting tools is 6, they are provided at ω degree intervals, and 10 cutting tools are provided.

Dice guide 8 corresponds to 10B and 100 respectively.
A.

8B and 8C are provided.

The cutting tool has a concave cutting edge 1 that follows the outer circumferential shape of the workpiece 2, as shown in FIGS. 8(A) and 8(B) with only the main parts enlarged.
1 person has IIB and IIC. In this example, it is a mackerel bit with an arcuate concave shape, and each cutting edge 11
A, IIB, and IIC are shown in Figure 9 and 1, respectively.
As shown in Fig. 0, portions 11A' and oEr that overlap each other in the circumferential direction when viewed from the axial direction of the workpiece 2 during cutting.
.

11C' is formed so as to surround the entire circumference of the workpiece 2.

Then, as shown in FIGS. 3 and 4 with the tool 10A, the bolt 1 is inserted into and removed from the tool holder.
It was concluded in 3.

In this embodiment, the cutting tool (hereinafter referred to as cutting tool IOA) is adjusted to a constant height X1il by the adjusting screw 14, and the tool holder 12 is moved to the slide unit 15.
The slide unit 15 is fitted with a support arm 1 extending radially from the base 17 and fixed with a bolt 16.
It is slidably fitted into the slider 18A of No. 8, and can be adjusted and fixed in left and right directions by adjusting screws 16A.

Bit drive devices 7A and 7B are provided at the extending ends of the support arms 18.

7C is provided with a telescoping hydraulic cylinder in this example, and a threaded connecting rod is screwed onto the piston rod 19 of the cylinder, and the end surface of the rod is spaced apart so as to correspond to the head of the adjusting screw 14.

Nuts 21 and 22 are screwed onto the threaded connecting rod, and the upper nut 21 is used to adjust the protruding length of the connecting rod, and in combination with the aforementioned cutting tool height adjustment screw 14, the cutting tool IOA can be cut. This is to adjust the cutting depth, that is, the cutting depth of surface flaws on the workpiece 2.

In addition, the lower neck (22) is used to adjust the return distance of the connecting rod, that is, the distance H between the cutting tool 10A and the workpiece 2. The cutting tool 10 is extended and the cutting tool IOA is activated by lowering the slide unit 15 through the guide of the slider 18A to adjust the time required to cut the workpiece 2 to a constant level. The cutting angle of the person
Adjustment is made to achieve the optimum conditions depending on the shape of the cutting tool, intervertebral space, material of the workpiece, and traveling speed.

Incidentally, the reaction force of the workpiece that is generated during cutting with the cutting tool is received by the inner surface of the die guide, and if the inner surface wears out due to the reaction force is large, it is desirable to feed lubricant into the inner surface. That is, FIG. 6(A) is a side sectional view, and FIG. 6(B) is a side sectional view.
As shown in the C-C sectional view of (A),
A lubricant inlet hole P is provided in the cross section of the die guide, and water-soluble cutting oil is pumped through the lubrication port θ to lubricate the workpiece 2 and the die guide 8 through the lubrication groove Q. It is possible to extend the lifespan of 8 people.

In addition, if the cutting tool is used to completely prevent horizontal wobbling of the workpiece during cutting, the hole inner diameter W, W of the die guide 8A before and after the position where the cutting tool 10A enters and exits as shown in FIG.
and the diameter d of the stiffened material, respectively.

It is preferable to draw the wire at an appropriate area reduction rate by providing the wire smaller than d'. That is, it is pulled out and held in the die guide holes 8A' and 8 at the front and rear of the cutting tool by 10 cutting tools, and automatic eaves removal can be performed stably without any horizontal wobbling of the workpiece. Further, by this drawing, the narrow surface of the flaw removal cutting part can be leveled at the same time.

(Function) Next, to explain automatic cutting and removal of surface flaws on the workpiece 2 by the cutting machine 6, surface flaws are first removed on the line where the workpiece 2 is wound up from the supply stand 1 to the winding machine 100. Since the flaw detector 3 does not operate when a part without any defects is being wound, the three cutting tools IO
A, IOB, and IOC are in a stopped state at fixed positions, and the workpiece 2 is wound up to the winding machine 100 side through the traveling path by the die guides 8A, 8B, and 8C.

Now, if there is a surface flaw on the workpiece 2, and this is detected by the flaw detector 3, a command to cut the flaw part is sent, then upon receiving this command, the cutting tool IOA corresponding to the flaw part, By extending the drive devices 7A, 7B, and 7C indicated by IOB and IOC using hydraulic cylinders, a predetermined cutting amount is removed.

In this way, when the surface flaws are removed and passed, the drive devices 7A, 7B, 7C are driven by the command of the cutting path.
is reduced and the cutting tool is 1oA.

10B, the IOC is returned to its old position and it waits again for the next cutting instruction when a flaw is discovered.

To specifically explain the control procedure by the control device 5 with reference to FIGS. 9 to 11, the flaw detector 3
The electric signal from the probe detects the depth of the flaw in the wire, and the electric signal from the probe detects in which part of the wire the flaw is located in the circumferential direction of the wire.

The cutting machine 6 described above is composed of three or more cutting tools that can move forward and backward, and each of the cutting tools ioA, IOB.

10C are provided at intervals of 120 degrees in the longitudinal direction in this example, and a low signal (
depth) occurs, the position, that is, the flaw detector 3 and the setting distance of the tool, are synchronized with the speedometer 4, and the angular position is judged from the pulse position, and the IOA of each tool is determined.
The IOB and IOC are activated.

To explain in detail the operating angle of the probes, as shown in FIGS. 9 and 10, the position of the fixed proximity switch S1 is set to the base point O of 0 degrees, and when the three flaw detection probes rotate, the probes In order to find out what angle position is at, for example, one rotation is converted into a pulse signal, and when it is 1 to 12 pulses, relay R1 of cutting tool 10A is activated, and 13 to 12 pulses are activated.
When there are 24 pulses, the relay R2 of the cutting tool 10B is activated, and when there are 5 to 36 pulses, the relay R3 of the cutting tool 10C is activated.

That is, as shown in Figure 2, three signals, a flaw depth signal and a flaw position (distance and angle) signal, are synchronized and sent for the operation instruction of each byte, and the operation of each byte is 3 times. It can only operate when two signals are received at the same time.

Further, when surface flaws are adjacent to each other or are present in the middle of the cutting range of the cutting tools, two or more adjacent cutting tools can be operated to cut and remove the surface flaws.

For example, if a flaw exists in the part P shown in FIG. 8(A), the cutting tool 10C and IOA operate to cut it, and if it exists in the part PI, the cutting tool IOA,
IOB is activated, and in the same way, in the case of P2, byte I
OC and IOB operate and cut, and each byte IO
Since the operating ranges (depth of cut, cutting angle) of A, IOB, and IOC are always constant, even if two or more adjacent cutting tools operate, cutting will not exceed a predetermined depth.

(Effects of the Invention) As described in detail above, the present invention has three or more cutting tools IOA, IOB, and IOC that move forward and backward independently.

Since the workpiece 2 is cut while being guided through the die guides 8A, 8B, and 8C, there is no need for complicated alignment of the cutting tool and the receiver at the center of rotation of the roller, which is conventionally required when receiving a cutting reaction force using a receiving roller. There are no leftover flaws or defects in the shape of the cut surface due to lateral vibration of the workpiece, and the cutting depth of thin materials is also stable.

As described above, according to the present invention, there is no runout of the workpiece even during surface flaw cutting, and the excess material is stable, so that quality stability and improvement in automatic surface flaw cutting can be expected.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing the overall configuration of the present invention, Figure 2 is a front view of the cutting machine, and Figure 3 is the Ushiku 91 showing details of the same part.
1 side view, Figure 4 is a sectional view taken along line A-A in Figure 2, Figure 5 (A)
Figure 5 (B) is an enlarged view of part a in Figure 2, Figure 5 (B) is a sectional view taken along line B-B of the front view of Figure 5 (A), and Figure 6 (A) is an enlarged view of the lubricant inlet hole in the cross section of the die guide. An explanatory diagram of an example in which the penetrating device is installed, FIG. 6(B) is a C-C1fr side view of the same as above, FIG. 7 is an explanatory diagram of the drawing clamp die guide, and FIGS. An explanatory diagram showing the correspondence between each cutting tool and the workpiece during cutting. FIG. 89 to FIG. 11 show the control means in the control device, FIG. The figure is an explanatory diagram of the bite and pulse signals, and FIG. 11 is a relay diagram thereof. 2 is a workpiece (wire), 3 is a flaw detector, 4 is a speed meter, 5 is a control device, 6 is a cutting machine, 7.7A, 7B. 7C is a drive device, 8A, 8B, 8C are die guides, 9
is the die box, IOA, IOB, and IOC are the cutting tools, θ is the lubrication port, P is the lubricant feed hole, and Q is the lubrication groove. Patent applicant: Nippon Steel Corporation ■2 Figure ■3 Same ya + Figure ya left figure (△) b Left j figure (8) ke 6th scale value) k! 6th (B) Ya 7th Ng Zheng A) #8 Garden (I5) 7! A ya/θen//same

Claims (1)

[Claims] 1) A flaw detector for detecting the position of surface flaws in the longitudinal direction and circumferential direction of a wire or rod-shaped workpiece (wire);
Automatic cutting equipment for bar and wire surface flaws removes flaws on the workpiece using a speed detector that detects the traveling speed of the workpiece, and a cutting tool that operates upon receiving information from these flaw detectors and speed detectors. A die guide having a minimum inner diameter approximately equal to the diameter of the workpiece and having a cutout portion where the cutting tool interferes when the cutting tool moves toward the workpiece is spaced at intervals in the longitudinal direction of the travel path of the workpiece. A cutting tool having a cutting edge with a recessed tip at a position corresponding to the die guide is provided so as to be able to move forward and backward independently toward the workpiece, and the cutting tool moves around the workpiece. and three or more sets are arranged offset in the axial direction of the workpiece,
Furthermore, each of the cutting edges of the cutting tool is formed with a portion that overlaps with the other in the circumferential direction when viewed from the axial direction of the workpiece during cutting, so that it can encircle the entire circumference of the workpiece. An automatic cutting device for surface flaws on rods and wires. 2) The automatic surface flaw cutting device for rods and wires according to claim 1, characterized in that a lubricant inlet hole is provided in the cross section of the die guide. 3) The automatic surface flaw cutting device for rods and wire rods according to claim 1, wherein the inner diameter of the hole in the die guide is smaller than the diameter of the workpiece.