JP2005279786A - Wire surface grinding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire surface grinding device, uniformly grinding a wire all over the outer peripheral surface and easily controlled even if the traveling speed of the wire is increased. <P>SOLUTION: Three or more nozzles 3 for injecting abrasives are radially disposed at equal intervals in the circumferential direction round the axis of the wire 1. All nozzles 3 are respectively disposed at spaces from each other in the axial direction of the wire 1 not to be opposite to each other. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wire surface grinding apparatus that uniformly grinds the outer peripheral surface of a wire by injecting the abrasive onto the outer periphery of the wire that runs in the longitudinal direction while being stretched in a straight line.

An oxide film is formed on the surface of the wire with heat treatment in the manufacturing process.
Therefore, when it is necessary to remove the oxide film, there are a case where surface treatment is performed with a chemical such as hydrochloric acid, and a case where a grinding material made of fine particles is sprayed onto the surface of the wire together with compressed air.

  As an example of the latter, the present applicants have already proposed a wire surface processing apparatus and a wire surface processing system as the following patent documents. The wire surface processing apparatus and the wire surface processing system efficiently perform surface processing of a wire by mechanical means. For this purpose, a tubular grinding mechanism having an inner diameter larger than the outer diameter of the wire to be processed, and continuously moving the wire through the inside thereof, and this grinding mechanism from the one end in the length direction A direction change type grinding part comprising a narrowing part for reducing the cross section of the flow path of the mixed fluid in the grinding mechanism part, and a grinding material flow means for causing the abrasive to flow at high speed as a mixed fluid with air toward the other end side. The direction change type grinding part is provided, and the flow direction of the mixed fluid is directed toward the center of the flow path so that the surface of the wire can be processed by bringing the abrasive into contact with the wire.

Japanese Patent Laid-Open No. 2003-039326

The exfoliation of the oxide film of the wire by the former chemical has a problem of deteriorating the working environment and generating waste such as chemicals. Except for the inventions of the above-mentioned documents, peeling of the oxide film of the wire by spraying of the grinding material makes it difficult to uniformly grind the surface of the wire without any defects when the moving speed of the wire is high.
Therefore, the present invention provides a compact device capable of grinding the outer surface of the wire uniformly and without defects even when the moving speed of the wire is high, and provides an apparatus with easy control different from the above-mentioned patent document. Let it be an issue.

The present invention according to claim 1 is a wire surface grinding in which a grinding material (13) is sprayed on the outer periphery of a wire (1) moving in the longitudinal direction while being stretched in a straight line, and the outer surface thereof is ground. In the device
Around the axis of the wire (1), three or more abrasive nozzles (3) are arranged radially at equal intervals in the circumferential direction, and all the nozzles (3) are not opposed to each other. It is a wire surface grinding apparatus characterized by being spaced apart from each other in the axial direction.

The present invention according to claim 2 is the method according to claim 1,
The abrasives (13) injected from the adjacent nozzles (3) are displaced in the axial direction so that most of them do not interfere with each other at the outer peripheral position of the wire (1).
The distance between the tip of each nozzle (3) and the wire (1) was arranged so that the abrasive (13) injected from the nozzle (3) had at least a spread corresponding to the diameter of the wire (1). This is a wire surface grinding apparatus.

The invention according to claim 3 is the invention according to claim 2,
The abrasive (13) injected from the nozzle (3) adjacent in the axial direction of the wire (1) does not interfere with each other at the outer peripheral position of the wire (1) and the abrasive (13). Each nozzle (3) is displaced in the axial direction to such an extent that the edges of the spread are in contact with each other, and the nozzle (2) is a wire surface grinding device in which the nozzle (2) is close to the wire (1).

Invention of Claim 4 is set in any one of Claims 1-3,
The surface of the wire provided with anti-sway means (4) that stretches and prevents the wire (1) from being placed upstream and downstream in the conveying direction of the injection position of the abrasive (13) onto the wire (1) It is a grinding device.
Invention of Claim 5 in any one of Claim 1-4,
The wire surface grinding apparatus is provided with a grinding material receiver (5) facing each nozzle port (2) and on the opposite side of the nozzle port (2) with respect to the axis.

The invention according to claim 6 is the invention according to claim 1,
A wire surface grinding apparatus in which at least two wires (1) are stretched and run parallel to each other, and the axis of the nozzle (3) is arranged in the tangential direction of the cross section of the adjacent wire (1).
The invention according to claim 7 is any one of claims 1 to 4,
The casing (6), the wire insertion hole (7a) passing through the center of the casing (6), and the nozzle port (2) passing through the outer periphery of the casing (6) are close to the center of the casing (6). A wire surface grinding apparatus comprising three or more nozzles (3), wherein the bottom of the casing (6) is formed in a pyramid or conical shape, and a grinding material outlet (8) is provided at a lower end thereof.

  In the present invention, three or more abrasive jetting nozzles 3 are radially arranged around the axis of the wire 1 at equal intervals in the circumferential direction, and all the nozzles 3 are arranged so that the nozzle ports 2 do not face each other. Since they are arranged apart from each other in the axial direction of 1, it is possible to grind the entire circumference of the wire 1 without leaving a uniform space. At the same time, since the nozzles 3 are separated from each other in the axial direction of the wire 1, the outer periphery of the wire 1 can be efficiently and reliably ground without causing the abrasives flowing out from the nozzles 3 to interfere with each other.

  Further, in the above configuration, the abrasives 13 injected from the adjacent nozzles 3 are offset in the axial direction so that most of the abrasives 13 do not interfere with each other at the outer peripheral position of the wire 1. At the same time, the distance between the tip of each nozzle 3 and the wire 1 is such that the grinding material 13 injected from the nozzle 3 is arranged so that there is at least a spread corresponding to the diameter of the wire 1. In addition, the outer periphery of the wire 1 can be uniformly ground.

  In the above-described configuration, the grinding material 13 injected from the nozzle 3 adjacent in the axial direction does not interfere with the majority of the grinding material 13 at the outer peripheral position of the wire material 1 and the edges of the spreading of the grinding material 13 are in contact with each other. When the nozzles 3 are displaced in the axial direction and the nozzle ports 2 are close to the wire 1, the outer periphery thereof can be reliably ground without being affected by the twist of the wire 1.

In the above configuration, in the case where the wire 1 is stretched upstream and downstream of the injection position of the grinding material 13 and the anti-sway means 4 is provided to prevent the shaking, the outer periphery of the wire 1 is made more uniform. Can be ground.
In the above configuration, when the abrasive receiver 5 is provided at a position opposite to the nozzle port 2 with respect to the wire 1, the injected abrasive is received, and smoothly flows down to the downstream side. Damage to the inner surface of the casing 6 can be prevented.

In the above configuration, in the case where at least two wires 1 are stretched and run parallel to each other, and the axis of the nozzle 3 is arranged in the tangential direction of the cross section of the adjacent wires 1, the plurality of wires 1 are simultaneously ground without grinding. Can do.
In the above configuration, the casing 6 includes a wire rod insertion hole 7a penetrating through the center thereof, and three or more nozzles 3 penetrating the outer periphery of the casing 6 and having the nozzle port 2 close to the center. In the case of a pyramid or conical shape provided with the abrasive outlet 8 at its lower end, the apparatus can be made compact and the abrasive 13 can be easily injected and recovered.

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory view showing the main part of the wire surface grinding apparatus of the present invention and showing the arrangement state of the nozzles 3 as viewed from the axial direction of the wire 1. FIG. 2 is an explanatory view of the arrangement of the nozzles 3 as viewed from the direction perpendicular to the axis of the wire 1. Further, FIG. 3 shows an injection range in which a pair of nozzles 3 adjacent to each other in the axial direction of the wire 1 injects the outer surface of the wire 1. FIG. It is explanatory drawing which shows the injection range with respect to each wire 1 of the nozzle 3. FIG. Next, FIG. 5 is an explanatory diagram of the anti-sway means 4 that stretches the wire 1 and prevents the anti-sway.

  As shown in FIG. 5, the wire surface grinding apparatus of the present invention is a winding device (not shown) while stretching the wire 1 by means of anti-sway means 4 comprising a pair of upper and lower guide rollers 10 and a tension roller 11 apart from each other. The abrasive is sprayed onto the outer peripheral surface of the wire 1 while the wire 1 is traveling through the wire. In this example, the abrasive is sprayed from the four nozzles 3 that are spaced apart from each other in the circumferential direction and the axial direction, and the outer peripheral surface of the wire 1 is ground uniformly and without wrinkles.

As shown in FIGS. 1 to 4, the nozzles 3 are arranged such that four nozzles 3 are arranged apart from each other by 90 ° in the circumferential direction of the wire 1, and the center line of the nozzle 3 is the wire. Perpendicular to the axis of (1). The nozzles 3 are close to each other in the axial direction of the wire 1 and are separated from each other by a distance of the outer diameter of the tip of the nozzle 3.
Further, the separation distance L between the outer surface of the wire 1 and the nozzle opening 2 of the nozzle 3 is t / L = tan θ where the thickness of the nozzle 3 is t, and the θ is experimentally 3 °. It is a satisfactory value. Here, if t = 1 mm, L = 19 mm. As apparent from FIG. 3, this is the distance at which the wire 1 collides with the wire 1 when the spread of the abrasive 13 injected from the nozzle port 2 of the nozzle 3 coincides with the outer periphery of the nozzle 3. By doing so, the abrasives 13 of the adjacent nozzles 3 do not interfere with each other on the surface of the wire 1 as shown in FIG.

  In other words, if the length of L is set to be greater than or equal to FIG. 3, the boundary portions of the diffusion range of the abrasive 13 injected from each other overlap each other, and the abrasives 13 collide with each other so that the wire 1 is not useful for grinding. Become. Further, if the length L is extremely shortened, the abrasive 13 cannot be uniformly injected onto the outer periphery of the wire 1. Therefore, in this example, as shown in FIG. 3, the separation distance L between the wire 1 and the nozzle port 2 of the nozzle 3 is determined so that the boundary portions of the injection ranges of the adjacent nozzles 3 are in contact with each other.

In this example, the particle size of the abrasive 13 is 0.15 mm as an example, the inner diameter of the nozzle 3 is 7.5 mm, and the length of the nozzle 3 itself is about 50 to 80 cm. The reason why the length of the nozzle 3 is increased in this way is that the grinding material 13 is accelerated in the nozzle 3 by the air pressure from the compressor by making it significantly longer than the conventional nozzle, thereby increasing the collision energy and grinding. This is because power can be raised. This has been clarified by experiments of the present inventors. As a result, in the past, when increasing the grinding force, a large-capacity compressor was required to increase the spraying force, but in the present invention, since it is not necessary to increase the air flow rate, it can be handled by a low-pressure air compressor. became. As a result, in this example, the pressure of the air compressor for injecting the abrasive 13 was set to 0.2 MPa, which is a low pressure.
The number of nozzles 3 of the present invention is 3 or more, more preferably 4 or more.

Next, in FIG. 5, when the diameter of the wire 1 is set to 3.2 mm as an example, it has been found that the separation distance A between the tension rollers 11 is preferably 350 mm or less. Thereby, the shaking of the wire 1 can be minimized.
The separation distance A between the tension rollers 11 is preferably adjusted according to the wire diameter of the wire 1 or the like. Further, it is preferable that the separation distance (offset amount) B between the tension roller 11 and the guide roller 10 can be adjusted according to the type of the wire 1.

Next, FIG. 6 is explanatory drawing about the conditions which run the some wire 1 parallelly and grind them uniformly simultaneously.
At this time, the injection direction of the nozzle 3 may be such that the axis of the nozzle 3 exists on the tangent line of the cross section of the pair of wires 1.
In the example of FIG. 1, since the injection direction of the nozzle 3 is 45 °, the gap X between the pair of wires 1 is X = (D / 2 × √2 × 2) −D = (√2-1) D Become. As an example, when D = 3.2 mm, X = 1.33 mm.

7 to 10 show an embodiment of the wire surface grinding apparatus of the present invention. FIG. 7 is a sectional front view (partially omitted), FIG. 8 is a side view thereof, and FIG. 9 is a nozzle 3 of FIG. FIG. 10 is a front view of the vicinity of FIG.
In the wire surface grinding apparatus of this embodiment, a shallow box-shaped casing 6 having a substantially square front surface is erected on a frame 12. The side surface of the casing 6 is formed in a vertically long rectangle as shown in FIG. The lower end of the casing 6 is formed in a pyramid shape, and an abrasive outlet 8 is provided at the tip thereof. The four corners of the casing 6 are rounded, and the nozzles 3 penetrate the casing 6 at an angle of 45 ° with respect to the horizontal line.

In FIG. 7, the nozzles 3 arranged in the clockwise direction sequentially from the upper right nozzle 3 are spaced apart from each other in the direction perpendicular to the paper surface by the outer diameter of the tip. As shown in FIG. 9, the tip of the nozzle 3 is provided with an abrasive receiver 5 facing the nozzle port 2. The abrasive receiver 5 is positioned on the opposite side of the nozzle port 2 with respect to the axis P on which the wire 1 travels. The abrasive receiver 5 is fixed to the tip of the nozzle 3 by support members 5a and 5b.
An abrasive pipe 14 and an air pipe 15 are connected to the rear ends of the nozzles 3, and the front ends of the nozzles 3 open to the rear ends of the nozzles 3.

  Next, as shown in FIG. 7, a wire rod insertion hole 7 a is formed on the front and back surfaces of the casing 6, and the wire rod 1 is inserted therethrough. In this example, the wire insertion hole 7a has a diameter that allows a plurality of wires to be inserted simultaneously. As shown in FIG. 8, a box-shaped bracket 16 is disposed at the front and rear center of the casing 6 before and after the casing 6, and at least a pair of guide rollers 10 and tension rollers 11 are provided as anti-sway means 4 inside. It has been. Also in this bracket 16, the wire insertion hole 7 is formed in an oval shape as shown in FIG. Then, the wire 1 is stretched while being stretched by the vibration preventing means 4, and the wire 1 is run, the abrasive 13 is ejected from the abrasive pipe 14, the compressed air is ejected from the air pipe 15, and the abrasive 13 is brought into the nozzle 3. It is accelerated and collides with the wire 1.

FIG. 11 is a control system diagram thereof.
The abrasive is supplied from the supply tank to the four nozzles 3 via the respective abrasive pipes 14 in FIG. Further, the compressed air is supplied from the air compressor to the four nozzles 3 via the respective air pipes 15. Then, the abrasive that is accelerated in each nozzle 3 and sprayed from the tip thereof grinds the outer surface of the wire, and returns to the cyclone separator from the abrasive outlet 8 at the lower end of the casing 6. The cyclone separator is connected to a dust collector at the center thereof, and the oxide film on the surface of the wire is sucked into the dust collector, and the abrasive is supplied from the storage tank to the supply tank through the intermediate tank and reused. A butterfly valve is interposed between the storage tank and the intermediate tank and between the intermediate tank and the supply tank, and a level meter for measuring the amount of the abrasive is provided in the intermediate tank and the supply tank. The butterfly valve is appropriately controlled to open and close by a fluid control valve.

The front view which shows the principal part of the wire surface grinding apparatus of this invention. The side view which shows the principal part of the apparatus. Explanatory drawing which shows the injection state of the abrasive 13 of the adjacent nozzle 3 in FIG. Explanatory drawing which shows each injection state of the four nozzles 3. FIG. Explanatory drawing which shows the relationship between the shaking prevention means 4 and the wire 1. FIG. Explanatory drawing in the case of grinding a pair of wire 1 simultaneously.

The cross-sectional front view which shows the Example of the wire rod surface grinding apparatus of this invention. The side view of the apparatus. Explanatory drawing which shows the relationship between the nozzle 3 and the abrasives receiver 5 of the apparatus. The front view of the apparatus. The control system figure of the same apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wire material 2 Nozzle port 3 Nozzle 4 Shaking prevention means 5 Grinding material receptacle 5a Support material 5b Support material 6 Casing

7 Wire insertion hole 7a Wire insertion hole 8 Grinding material outlet
10 Guide roller
11 Tension roller
12 frame
13 Abrasive
14 Grinding material piping
15 Air piping
16 Bracket

Claims (7)

In a wire surface grinding apparatus that injects a grinding material (13) onto the outer periphery of a wire rod (1) that is stretched in a straight line and moves in the longitudinal direction, and grinds the outer surface thereof,
Around the axis of the wire (1), three or more abrasive nozzles (3) are arranged radially at equal intervals in the circumferential direction, and all the nozzles (3) are not opposed to each other. A wire rod surface grinding device, wherein the wire rod surface grinding device is disposed apart from each other in the axial direction of the wire. In claim 1,
The abrasives (13) injected from the adjacent nozzles (3) are displaced in the axial direction so that most of them do not interfere with each other at the outer peripheral position of the wire (1).
The distance between the tip of each nozzle (3) and the wire (1) was arranged so that the abrasive (13) injected from the nozzle (3) had at least a spread corresponding to the diameter of the wire (1). A wire surface grinding apparatus. In claim 2,
The abrasive (13) injected from the nozzle (3) adjacent in the axial direction of the wire (1) does not interfere with each other at the outer peripheral position of the wire (1) and the abrasive (13). Each nozzle (3) is displaced in the axial direction to such an extent that the edges of the spreads are in contact with each other, and the nozzle (2) is close to the wire (1) and the wire surface grinding device. In any one of Claims 1-3,
The surface of the wire provided with anti-sway means (4) that stretches and prevents the wire (1) from being placed upstream and downstream in the conveying direction of the injection position of the abrasive (13) onto the wire (1) Grinding equipment. In any one of Claims 1-4,
A wire material surface grinding apparatus provided with a grinding material receptacle (5) opposite to each nozzle port (2) and opposite to the nozzle port (2) with respect to the axis. In claim 1,
A wire surface grinding apparatus in which at least two wires (1) are stretched parallel to each other and the axis of the nozzle (3) is arranged in the tangential direction of the cross section of the adjacent wire (1). In any one of Claims 1-4,
The casing (6), the wire insertion hole (7a) passing through the center of the casing (6), and the nozzle port (2) passing through the outer periphery of the casing (6) are close to the center of the casing (6). A wire surface grinding apparatus comprising three or more nozzles (3), wherein the bottom of the casing (6) is formed in a pyramid or conical shape, and a grinding material outlet (8) is provided at a lower end thereof.

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