JP2009045721A - Shield nozzle cutting tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shield nozzle cutting tool capable of promptly cutting a shield nozzle without crushing the shield nozzle and without distorting a cut face when cutting the shield nozzle. <P>SOLUTION: A slit 1b for inserting a cutting edge reaching a bottom part of an insertion hole 1c from an upper end of a holding member 1 and orthogonal to the axis line direction of the insertion hole 1c is provided in the holding member 1 wherein the insertion hole 1c with an inner diameter slightly larger than an outer diameter of the shield nozzle is arranged to lead from an insertion port 1e at one end to an outlet 1f at the other end. A visible window 1d opened on the outer peripheral face of the holding member 1 from the inner side of the insertion hole 1c is formed along the axis line direction of the insertion hole 1c on the outlet 1f side of the slit 1b for inserting the cutting edge. It is preferable to provide graduations 1g at the window edge of the visible window 1d along the axis line direction of the insertion hole 1c. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a tool for cutting a plastic shield nozzle of a gas shield arc welding torch.

Conventionally, gas assembly arc welding such as MAG welding and MIG welding has been used when assembling automobile parts and the like. Patent Document 1 discloses a technique of a gas shielded arc welding method. As shown in FIG. 8, the welding torch used for gas shielded arc welding includes a contact tip 50 to which a solid wire is fed, a tip holder 51 for holding the contact tip 50, and the contact tip 50 and the tip holder 51. The cylindrical shield nozzle 52 is arranged so as to be configured, and a nozzle holder 53 for attaching the shield nozzle 52 to the chip holder 51. In gas shielded arc welding, an electric current is passed through a solid wire that is continuously fed through a contact tip 51 to generate (discharge) an arc between the solid wire and a member to be welded. In this welding method, the solid wire and the member to be welded are melted by the heat to be welded, and the member to be welded is welded. When welding is performed, in order to prevent the occurrence of blowholes due to contact between the welding location and air, CO ² , argon, or the like is introduced into the shield nozzle 52 from the gas supply port 51 a formed in the chip holder 51. The inert gas is supplied, and the inert gas is supplied from the tip of the shield nozzle 52 to the welded portion to prevent contact between the welded portion and air. Thus, the shield nozzle 52 is attached to the welding torch in order to prevent the inert gas from diffusing and to reliably supply the inert gas to the welding location.

During welding, spatter, which is fine particles of molten metal, is generated and scattered from the welding location. Therefore, conventionally, when welding iron, the shield nozzle 52 is made of copper or a copper alloy, which is a metal having a property different from that of iron, to suppress adhesion of spatter to the shield nozzle 52. . However, even in this case, if the sputter collides with the shield nozzle 52, the shield nozzle 52
The surface was scratched, and spatter adhered to and accumulated on the scratched portion. If the spatter adhering to the shield nozzle 52 accumulates, the flow of the inert gas in the shield nozzle 52 becomes worse, and a blow hole is generated at the welding location. Therefore, the welding line and the welding operation are stopped, and the worker periodically removes the spatter adhering to the shield nozzle 52. Although different depending on the workpiece and welding conditions, conventionally, the operator has removed the spatter adhering to the shield nozzle 52 at intervals of 30 minutes to 1 hour. Thus, in order to remove the spatter adhering to the inside of the shield nozzle 52, it is necessary to stop the welding line and the welding operation, and there is a problem that the production efficiency is deteriorated.

  Therefore, a welding torch has been proposed in which the shield nozzle 52 is made of a plastic pipe such as a fluororesin, thereby preventing spatter adhesion. The fluororesin is a material that has completely different properties from the spatter in which the metal is melted, and since the friction coefficient of the fluororesin is low, it is possible to completely prevent the spatter from adhering to the shield nozzle. However, since the shield nozzle 52 is a plastic pipe, when it collides with the surface of the sputter shield nozzle 52, the collided portion is slightly dissolved. Further, many spatters collide particularly with the tip of the shield nozzle 52. When the spatter collides with the tip of the shield nozzle 52, the tip of the shield nozzle 52 is melted and deformed. Specifically, the tip of the shield nozzle 52 is swollen by melting. If the tip portion of the shield nozzle 52 is deformed, the supply of the inert gas to the welded portion becomes unstable, and a blow hole is generated. For this reason, when the tip of the shield nozzle 52 is deformed, the tip of the shield nozzle 52 is cut out by about 3 mm so that the tip shape of the shield nozzle 52 is not deformed. When the shield nozzle 52 is shortened by cutting the tip of the shield nozzle 52 a plurality of times, a plastic pipe is cut into a predetermined length to produce a new shield nozzle 52, and the shortened shield The nozzle 52 is replaced with the newly manufactured shield nozzle 52.

  In the case of cutting off the tip of the shield nozzle 52 or manufacturing the shield nozzle 52 by cutting a plastic pipe, the tube has been conventionally cut using a tube cutter described in Non-Patent Document 1. The tube cutter described in Non-Patent Document 1 includes a recessed receiving portion that receives the shield nozzle 52, a cutting blade that is openable and closable at a position facing the receiving portion, and a measure. ing. When the shield nozzle 52 or the plastic pipe is cut with this tube cutter, the shield nozzle 52 or the plastic pipe is received by the receiving portion, and the cutting is performed between the receiving portion and the cutting blade. Thus, since the shield nozzle 52 and the plastic pipe are cut between the receiving portion and the cutting blade, the shield nozzle 52 after cutting is crushed, and the cut surface is in the axial direction. As a result, there is a problem that the image is not completely vertical and is distorted. When the tip of the shield nozzle 52 is crushed or the cut surface is distorted and the shield nozzle 52 is attached to the welding torch and welding is performed, the flow of the inert gas to the welded portion is not stabilized, and the blow hole There was a problem that would occur.

Since the tube cutter described in Non-Patent Document 1 is provided with a measure, it is convenient when the shield nozzle 52 is manufactured by cutting a plastic pipe into a predetermined length. However, it takes time to measure the plastic pipe once with the measure, and then cut it after marking it. When replacing the shield nozzle 52, it is necessary to stop the welding line. Therefore, if the replacement operation of the shield nozzle 52 cannot be performed quickly, the production efficiency is reduced and a loss occurs.
JP 2004-249323 A Catalog of Nippon Pisco Co., Ltd. P660-P663 2007

  The present invention solves the problems in the welding process as described above, and when cutting the shield nozzle, the shield nozzle can be quickly cut without being crushed and without distorting the cut surface. Provide cutting tools.

The present invention made to solve the above problems is a shield nozzle cutting tool for cutting a resin shield nozzle of a gas shield arc welding torch,
A holding member provided with an insertion hole having an inner diameter slightly larger than the outer diameter of the shield nozzle so as to lead from the insertion port at one end to the outlet at the other end, reaches the bottom of the insertion hole from the upper end of the holding member, and A slit for cutting blade intervention perpendicular to the axial direction of is provided.

  A viewing window that opens from the inside of the insertion hole to the outer peripheral surface of the holding member is formed on the side of the exit side of the slit for cutting blade intervention along the axial direction of the insertion hole. Further, it is preferable to provide a scale along the axial direction of the insertion hole.

  Moreover, it is preferable to form a holding window that opens from the inner side of the insertion hole to the outer peripheral surface of the holding member on the side of the insertion blade side of the cutting blade intervention slit.

  Further, it is preferable to form a groove for cutting off the tip of the shield nozzle reaching the bottom of the insertion hole at the end of the holding member on the outlet side.

  A holding member provided with an insertion hole having an inner diameter slightly larger than the outer diameter of the shield nozzle so as to lead from the insertion port at one end to the outlet at the other end, reaches the bottom of the insertion hole from the upper end of the holding member, and Since the cutting blade intervention slit perpendicular to the axial direction of the is provided, when the shield nozzle is cut, the shield nozzle is prevented from being deformed by holding the outer surface of the shield nozzle with the inner surface of the insertion hole. It was possible to prevent the cut shield nozzle from being crushed and the cut surface from being distorted. For this reason, when welding is performed with a shield nozzle attached to the welding torch, the flow of inert gas to the welding location is stable, and the inert gas can be reliably supplied to the welding location, generating blow holes. It became possible to prevent.

  A viewing window that opens from the inside of the insertion hole to the outer peripheral surface of the holding member is formed on the side of the exit side of the slit for cutting blade intervention along the axial direction of the insertion hole. If a scale is provided along the axial direction of the insertion hole, the shield nozzle is inserted into the insertion hole, the tip of the shield nozzle is aligned with the desired scale, and the shield nozzle is cut to the desired length. It is possible to cut the shield nozzle quickly. For this reason, it is possible to quickly replace the shield nozzle, and it is possible to improve production efficiency.

  Further, when a holding window that is opened from the inside of the insertion hole to the outer peripheral surface of the holding member is formed on the side of the insertion blade side of the slit for cutting blade intervention, the operator presses the outer surface of the shield nozzle from the holding window, By cutting the shield nozzle, it is possible to prevent the shield nozzle inserted into the insertion hole from moving and to cut the shield nozzle to a desired length with certainty.

  Moreover, if the groove for cutting the tip of the shield nozzle reaching the bottom of the insertion hole is formed at the end of the holding member on the outlet side, the tip of the shield nozzle can be cut off. When cutting the shield nozzle, holding the outer surface of the shield nozzle with the inner surface of the insertion hole prevents the shield nozzle from being deformed, so that the cut shield nozzle is crushed or the cut surface is distorted. It became possible to prevent. For this reason, when welding is performed with a shield nozzle attached to the welding torch, the flow of inert gas to the welding location is stable, and the inert gas can be reliably supplied to the welding location, generating blow holes. It became possible to prevent.

(Configuration of the first embodiment)
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
1 is a top view of a shield nozzle cutting tool showing a first embodiment of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a front view of FIG. 1, and FIG. It is. The shield nozzle cutting tool according to the first embodiment includes a holding member 1 and a base member 2.

  The holding member 1 is provided with an insertion hole 1c leading from the insertion port 1e at one end to the outlet 1f at the other end. In the present embodiment, the holding member 1 is formed of a metal pipe such as stainless steel, whereby the inside of the metal pipe is used as the insertion hole 1c. The inner diameter of the insertion hole 1c is slightly larger than the outer diameter of the shield nozzle to be cut. In this embodiment, the inner diameter of the insertion hole 1c of the holding member 1 when cutting a shield nozzle having an outer diameter of 16 mm is 16.5 mm to 17 mm. The inner diameter of the insertion hole 1c of the holding member 1 when cutting a shield nozzle having an outer diameter of 14 mm is 14.5 mm to 15 mm, and the holding member 1 when cutting a shield nozzle having an outer diameter of 19 mm. The inner diameter of the insertion hole 1c is 19.5 mm to 20 mm. The bottom portion 1 a of the holding member 1 is flattened and is welded to the plate-like base member 2. The base member 2 is made of a metal plate material such as stainless steel.

  A cutting blade intervention slit 1b is formed at a position (20 mm in the present embodiment) slightly moved from the insertion port 1e of the holding member 1 to the outlet 1f side of the holding member 1. The cutting blade intervention slit 1b is formed to be orthogonal to the axial direction of the insertion hole 1c. Further, the cutting blade intervention slit 1 b reaches the bottom of the insertion hole 1 c from the upper end of the holding member 1. The width dimension of the cutting blade intervention slit 1b is slightly larger than the blade thickness of the cutting blade that cuts the shield nozzle. In this embodiment, the width dimension of the cutting blade intervention slit 1b is 1 mm.

  A visual recognition window 1d is formed on the side of the cutting blade intervention slit 1b on the outlet 1f side. The viewing window 1d opens from the inner side of the insertion hole 1c to the outer peripheral surface of the holding member 1. In this embodiment, the viewing window 1d opens from the side surface of the holding member 1 to the upper surface. The visual recognition window 1d is formed along the axial direction of the insertion hole 1c. In this embodiment, the visual recognition window 1d is formed from the outlet 1f of the holding member 1 toward the insertion opening 1e.

  A scale 1g is engraved on the window edge of the viewing window 1d. In the present embodiment, a graduation 1 g in units of 1 cm is engraved. It should be noted that a graduation in units of 1 mm may be engraved between the graduations 1g. A dimension 1h from the cutting blade intervention slit 1b is stamped on the side of the scale 1g. In the present embodiment, the upper portion of the holding member 1 is chamfered flat, and the chamfered portion is marked with a scale 1g and a dimension 1h. In the present embodiment, the scale 1g and the dimension 1h are provided on the holding member 1 by engraving. However, the scale 1g and the dimension 1h may be provided by printing, or the scale 1g and the dimension 1h are printed. The sticker may be stuck on the holding member 1.

  A mounting hole 2a is formed in the base member 2, and the shield nozzle cutting tool of the present invention can be mounted on a work table or the like.

(Operation of the first embodiment)
Hereinafter, a method for producing a shield nozzle by making a plastic pipe as a raw material of the shield nozzle to a desired length will be described. A plastic pipe is inserted into the insertion hole 1 c from the insertion port 1 e side of the holding member 1. The tip of the plastic pipe is matched with the scale 1g of the desired dimension 1h. A thin cutting blade such as a so-called cutter knife is inserted into the cutting blade intervention slit 1b, and the cutting blade is completely pushed down to cut the plastic pipe. When the plastic pipe is cut, the outer surface of the plastic pipe is held by the inner surface of the insertion hole 1c to prevent the plastic pipe from being deformed. The cut surface is not distorted.

(Configuration of Second Embodiment)
Below, 2nd Embodiment of the shield nozzle cutting tool of this invention is described.
FIG. 5 is a top view of a shield nozzle cutting tool showing a second embodiment of the present invention, FIG. 6 is a side view of FIG. 5, and FIG. 7 is a front view of FIG. The shield nozzle cutting tool according to the second embodiment includes a holding part 11 and a base part 12. In 2nd Embodiment, it manufactures by casting aluminum so that the holding | maintenance part 11 and the base 12 become united, but this embodiment is not limited to this, Casting metal materials other than aluminum It may also be manufactured by welding the holding part 11 and the base part.

  The holding portion 11 has a block shape, and an insertion hole 11c having a circular cross-sectional shape communicating from the insertion port 11e at one end of the holding portion 11 to the outlet 11f at the other end is formed therethrough. The inner diameter of the insertion hole 11c is slightly larger than the outer diameter of the shield nozzle to be cut. In the present embodiment, the inner diameter of the insertion hole 11c of the holding portion 11 when cutting a shield nozzle having an outer diameter of 16 mm is from 16.5 mm to 17 mm. Further, the inner diameter of the insertion hole 11c of the holding portion 11 when cutting the shield nozzle having an outer diameter of 14 mm is 14.5 mm to 15 mm, and the holding portion 1 when cutting the shield nozzle having an outer diameter of 19 mm is used. The inner diameter of the insertion hole 11c is 19.5 mm to 20 mm. The base portion 12 has a plate shape and is formed below the holding portion 11. The width dimension of the base portion 12 is larger than the width dimension of the holding portion 11.

  A cutting blade intervention slit 11b is formed at a position (40 mm in the present embodiment) slightly moved from the insertion port 11e of the holding unit 11 to the outlet 11f side of the holding unit 11. The cutting blade intervention slit 11b is formed to be orthogonal to the axial direction of the insertion hole 11c. Further, the cutting blade intervention slit 11 b reaches the bottom of the insertion hole 11 c from the upper end of the holding member 11. The width dimension of the cutting blade intervention slit 11b is slightly larger than the blade thickness of the cutting blade that cuts the shield nozzle. In this embodiment, the width dimension of the cutting blade intervention slit 11b is 1 mm.

  A viewing window 11d is formed on the side of the cutting blade intervention slit 11b on the outlet 11f side. The visual recognition window 11d opens from the inner side of the insertion hole 11c to the outer peripheral surface of the holding part 11. In the present embodiment, the visual recognition window 11d opens from the side surface of the holding part 11 to the upper surface. The visual recognition window 11d is formed along the axial direction of the insertion hole 11c. In the present embodiment, the visual recognition window 11d is formed from the outlet 11f of the holding portion 11 toward the insertion port 11e.

  A scale 11g is engraved along the window edge of the viewing window 11d. In this embodiment, a scale 11g in 1 cm units is engraved. It should be noted that a graduation in units of 1 mm may be engraved between the graduations 11g. A dimension 11h from the cutting blade intervention slit 11b is engraved on the side of the scale 11g. In this embodiment, in this embodiment, the scale 11g and the dimension 11h are provided on the holding portion 11 by engraving. However, the scale 11g and the dimension 11h may be provided by printing, or the scale. A sticker on which 11 g and dimension 11 h are printed may be pasted on the holding unit 11.

  An attachment hole 12a is formed in the base member 12, and the shield nozzle cutting tool of the present invention can be attached to a work table or the like.

  A holding window 11j is formed on the side of the insertion blade 1e side of the cutting blade intervention slit 11b. The holding window 11j opens from the inner side of the insertion hole 11c to the outer peripheral surface of the holding unit 11, and in this embodiment, opens to the upper surface of the holding unit 11. In this embodiment, the holding window 11j is formed from the insertion port 11e of the holding portion 11 to a position slightly moved to the outlet 11f side (20 mm in this embodiment).

  A shield nozzle excision groove 11k is formed at a position (10 mm in the present embodiment) moved slightly toward the insertion port 11e from the outlet 11f, which is the end of the holding portion 11. The shield nozzle cutting groove 11k reaches the bottom of the insertion hole 11c. In the present embodiment, as shown in FIG. 5 and FIG. 6, the upper portion of the holding portion 11 is cut off from the portion where the shield nozzle cutting groove 11 k is formed on the outlet 11 f side of the holding portion 11. It has become.

(Operation of Second Embodiment)
Hereinafter, a method for producing a shield nozzle by making a plastic pipe as a raw material of the shield nozzle to a desired length will be described. The tip of the plastic pipe is placed on the portion of the holding portion 11 where the holding window 11j is formed, and is inserted into the insertion hole 11c from the insertion port 1e side of the holding portion 11. Thus, in this embodiment, since the holding window 11j is formed, it is easy to insert the plastic pipe into the insertion hole 11c. The tip of the plastic pipe is aligned with the scale 11g having a desired dimension 11h. An operator presses the outer surface of the plastic pipe from the holding window 11j, interposes a thin cutting blade such as a so-called cutter knife into the cutting blade intervention slit 11b, and pushes down the cutting blade completely to remove the plastic pipe. Disconnect. When the plastic pipe is cut, the outer surface of the plastic pipe is held by the inner surface of the insertion hole 11c, thereby preventing the plastic pipe from being deformed. The cut surface is not distorted.

  When cutting off the tip portion of the used shield nozzle, the shield nozzle is inserted into the insertion hole 11c from the insertion port 1e side of the holding portion 11, and the tip of the shield nozzle is slightly protruded from the end portion of the insertion hole 11c ( In this embodiment, about 3 mm), the cutting blade is lowered into the shield nozzle cutting groove 11k so that the cutting blade is applied to the end of the insertion hole 11c, and the tip of the shield nozzle is cut off. When the shield nozzle is cut, the outer surface of the shield nozzle is held by the inner surface of the insertion hole 11c, thereby preventing the shield nozzle from being deformed. The surface is not distorted.

  The shield nozzle cutting tool of the present invention may be made of a plastic material. When the shield nozzle cutting tool is made of a transparent resin such as an acrylic resin, it is possible to make a plastic made without forming the viewing window 1d (11d). The tip of the pipe can be visually recognized, and the plastic pipe can be cut to a desired length.

  Although the present invention has been described above in connection with the most practical and preferred embodiments at the present time, the present invention is not limited to the embodiments disclosed herein. The shield nozzle cutting tool with such a change is also understood to be included in the technical scope without departing from the spirit or concept of the invention that can be read from the claims and the entire specification. There must be.

It is a top view of the shield nozzle cutting tool of a 1st embodiment. It is a side view of FIG. It is a front view of FIG. It is a perspective view of the shield nozzle of a 1st embodiment. It is a top view of the shield nozzle cutting tool of 2nd Embodiment. FIG. 6 is a side view of FIG. 5. FIG. 6 is a front view of FIG. 5. It is explanatory drawing of a welding torch.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Holding member 1a Bottom part 1b Cutting blade intervention slit 1c Insertion hole 1d Viewing window 1e Insertion hole 1f Other end 1g Scale 1h Size 2 Base member 2a Mounting hole 11 Holding part 11b Cutting blade intervention slit 11c Insertion hole 11d Viewing window 11e Insertion 11f Exit 11g Scale 11h Dimensions 11j Holding window 11k Shield nozzle cutting groove 11m One end 12 Base 12a Mounting hole 50 Contact tip 51 Tip holder 51a Gas supply port 52 Shield nozzle 53 Nozzle holder

Claims (4)

A shield nozzle cutting tool for cutting a resin shield nozzle of a gas shield arc welding torch,
A holding member provided with an insertion hole having an inner diameter slightly larger than the outer diameter of the shield nozzle so as to lead from the insertion port at one end to the outlet at the other end, reaches the bottom of the insertion hole from the upper end of the holding member, and A cutting tool for cutting a shield nozzle, characterized in that a slit for cutting blade intervention perpendicular to the axial direction is provided.   On the side of the exit side of the slit for cutting blade intervention, along the axial direction of the insertion hole, a viewing window opened from the inside of the insertion hole to the outer peripheral surface of the holding member is formed, and on the window edge of this viewing window, The shield nozzle cutting tool according to claim 1, wherein a scale is provided along the axial direction of the insertion hole.   The holding window opened to the outer peripheral surface of the holding member from the inside of the insertion hole is formed on the side of the insertion port side of the slit for cutting blade intervention. Shield nozzle cutting tool.   The shield nozzle cutting tool according to any one of claims 1 to 3, wherein a groove for cutting the tip of the shield nozzle reaching the bottom of the insertion hole is formed at an end portion on the outlet side of the holding member.

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