WO2017208614A1 - Outil électrique - Google Patents

Outil électrique Download PDF

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Publication number
WO2017208614A1
WO2017208614A1 PCT/JP2017/014060 JP2017014060W WO2017208614A1 WO 2017208614 A1 WO2017208614 A1 WO 2017208614A1 JP 2017014060 W JP2017014060 W JP 2017014060W WO 2017208614 A1 WO2017208614 A1 WO 2017208614A1
Authority
WO
WIPO (PCT)
Prior art keywords
welding
metal
metal portion
laser
iron
Prior art date
Application number
PCT/JP2017/014060
Other languages
English (en)
Japanese (ja)
Inventor
英樹 松嶋
陽介 ▲高▼崎
Original Assignee
株式会社 マキタ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社 マキタ filed Critical 株式会社 マキタ
Publication of WO2017208614A1 publication Critical patent/WO2017208614A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/32—Bonding taking account of the properties of the material involved
    • B23K26/323—Bonding taking account of the properties of the material involved involving parts made of dissimilar metallic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for

Definitions

  • the present invention relates to a power tool such as a hammer drill for performing a hammer operation on a workpiece.
  • a hammer drill having a tool holder that holds a hammer bit in a detachable manner at the front and transmits a rotation output of a motor to the hammer bit is known.
  • a piston that reciprocates back and forth and a striker that slides inside the piston are arranged at the rear part of the tool holder, and the tool holder is integrated from the front part to the rear part.
  • the tool holder In the hammer drill, the tool holder is integrated. In order to ensure sufficient strength, the tool holder is made of iron (forged integrated structure) and is heavy. Therefore, in order to reduce the weight, it can be considered that the tool holder is made of aluminum. However, with aluminum, the strength of the tool holder, particularly the strength of the front hammer bit mounting portion, cannot be sufficiently ensured. If the hammer bit mounting portion is made of aluminum, there is a high possibility that the hammer bit mounting portion is deformed during the operation of the hammer bit and the subsequent operation of the hammer bit is hindered. Therefore, a main object of the present invention is to provide a power tool including parts having a plurality of characteristics such as being lighter while having sufficient strength.
  • the invention according to claim 1 is provided with a component having a first metal portion and a second metal portion having a melting point different from that of the first metal portion.
  • the first metal portion and the second metal portion are joined by welding.
  • the invention according to claim 2 is the above invention, wherein the welding is laser welding.
  • the first metal portion is made of iron (including an iron alloy)
  • the second metal portion is made of aluminum (including an aluminum alloy). It is a feature.
  • a penetration depth which is a depth at which the first metal portion is melted into the second metal portion by the welding, is 0.2 mm or more and 0.3 mm or less.
  • the first metal portion and the second metal portion are in contact with each other on at least two surfaces, and the welding is performed on at least two surfaces of the contact surfaces. Is to be enforced.
  • the invention according to claim 6 is characterized in that, in the above invention, the thickness of the portion where the welding is performed in the second metal portion is larger than the thickness of the portion where the welding is not performed.
  • the first metal portion has a melting point higher than that of the second metal portion, and the first metal portion is a portion where the welding is performed. Is arranged outside the second metal portion.
  • the length of the surface where the first metal portion and the second metal portion are in contact with each other at a site where the welding is performed is the length of the first metal portion.
  • the length is more than twice the wall thickness.
  • FIG. 2 is a partially enlarged view of FIG. 1.
  • FIG. 1 is a central longitudinal sectional view of a hammer drill 1 which is an example of an electric tool (blow tool) according to the present invention
  • FIG. 2 is an enlarged front view of FIG.
  • the hammer drill 1 includes a housing 2 that is a frame for holding various members, a power unit 4 that is disposed at the rear part of the housing 2 (the right part of the horizontally long FIG. 1) and generates power, and converts the power of the power unit 4 Intermediate portion 6 disposed in front of the power unit 4 for transmission, and disposed in front of the intermediate unit 6, and the power of the power unit 4 is transmitted through the intermediate unit 6 after appropriate conversion,
  • a tool holder 8 is provided as a tip tool holding portion.
  • the power unit 4 includes a motor 10, and the housing 2 includes a cylindrical motor housing 12 in which the motor 10 is disposed.
  • a grip housing 18 formed by combining the left half and the right half is connected to the rear portion of the motor housing 12.
  • the grip housing 18 can be gripped by an operator.
  • a switch 20 is disposed in the grip housing 18.
  • the switch 20 is connected to a trigger 22 that protrudes forward on the lower side of the motor housing 12.
  • the switch 20 is switched according to whether or not the trigger 22 is pressed.
  • a cord 30 that can be connected to a power source is introduced into the grip housing 18.
  • the motor 10 and the cord 30 are connected to each other via the switch 20.
  • the motor 10 includes a motor shaft 32 that can rotate around the shaft, and is disposed in the motor housing 12 in a state where the direction of the motor shaft 32 is the front-rear direction. Teeth are formed at the front end of the motor shaft 32.
  • the intermediate portion 6 includes a drive conversion mechanism 40, a power transmission mechanism 42, a striking mechanism 44, and a gear housing 46 in which the left and right halves that form the outline of these are combined.
  • the housing 2 includes a gear housing 46.
  • the drive conversion mechanism 40 is a mechanism for converting the rotational output of the motor shaft 32 into a reciprocating output in the front-rear direction.
  • the drive conversion mechanism 40 is integrally attached to the intermediate shaft 50 in the front-rear direction and the rear end portion of the intermediate shaft 50. It includes a gear 52 that meshes with the teeth of the front end, a rotating body 54 that is integrally attached to the intermediate shaft 50, a swinging member 56 that is connected to the rotating body 54, and a piston 58 that is connected to the swinging member 56.
  • the rotating body 54 is a cylindrical member whose axial direction is the front-rear direction, and a guide 62 is formed on the outer surface thereof. Yes.
  • the swing member 56 extends vertically and is provided outside the rotating body 54 via a plurality of balls 64, 64. As each rotating body 54 rotates, each ball 64 relatively follows the guide 62 and moves back and forth, thereby swinging the swinging member 56 back and forth.
  • the piston 58 is a bottomed cylindrical member having an axial direction in the front-rear direction and opened forward, and a link 66 connected to the upper end portion of the swinging member 56 is integrally provided at the bottom portion (rear end portion). ing. The piston 58 reciprocates in the front-rear direction via the link 66 as the swinging member 56 swings.
  • the power transmission mechanism 42 is a mechanism that transmits the rotational driving force transmitted to the intermediate shaft 50 of the drive conversion mechanism 40 to the tool holder 8, and includes a first gear 70 and a second gear 72.
  • the first gear 70 has a cylindrical shape, has a tooth portion on the outer surface of the front portion, and is fixed to the outer front portion of the intermediate shaft 50.
  • the second gear 72 has a ring shape and meshes with the teeth of the first gear 70 at the teeth formed on the outer surface.
  • the striking mechanism 44 is a mechanism for transmitting the output in the front-rear direction by the drive conversion mechanism 40 to the bit (tool, tip tool) mounted on the tool holder 8 as an impact force. It has a bolt 82.
  • the striker 80 is a cylindrical member whose axial direction is the front-rear direction, and has an outer diameter equivalent to the inner diameter of the piston 58 of the drive conversion mechanism 40, and is disposed so as to be slidable back and forth within the piston 58. Has been.
  • a space surrounded by the rear surface of the striker 80 and the rear end portion of the inner surface of the piston 58 is an air chamber 84 that transmits the sliding motion of the piston 58 to the striker 80 by air pressure fluctuation.
  • the impact bolt 82 is a columnar member extending in the front-rear direction, and is disposed on the front side of the striker 80.
  • the tool holder 8 is a cylindrical member whose axial direction is the front-rear direction, and is provided with a cylinder portion 90 and a bit mounting portion 92 disposed in front thereof.
  • the cylinder part 90 has an inner diameter equivalent to the outer diameter of the piston 58, and the piston 58 is disposed in the cylinder part 90 so as to be movable back and forth.
  • a second gear 72 of the power transmission mechanism 42 is fixed to the outside of the cylinder portion 90.
  • a bit is inserted into the bit mounting portion 92.
  • the front portion of the impact bolt 82 of the striking mechanism 44 is disposed.
  • Chuck balls 94 and 94 for fixing the bit are arranged on the bit mounting portion 92.
  • the tool holder 8 is formed by welding an iron front portion 100 (first metal portion) including a bit mounting portion 92 and an aluminum rear portion 102 (second metal portion) including a cylinder portion 90.
  • iron includes an iron alloy (for example, stainless steel)
  • aluminum includes an aluminum alloy (for example, duralumin, super duralumin, or ultra super duralumin). Iron and aluminum are different metals having different melting points.
  • a diameter-expanded portion 110 whose inner diameter and outer diameter are expanded from the front side is disposed.
  • a flange 112 is formed at the front end portion of the rear portion 102.
  • a cylindrical portion 114 in front of the flange 112 in the rear portion 102 is contained in the enlarged diameter portion 110 of the front portion 100, and the inner surface of the enlarged diameter portion 110 is in contact with the outer surface in front of the flange 112 (interface C).
  • the rear surface of the diameter portion 110 is in contact with the front surface of the flange 112 (interface R).
  • Welding is performed between the enlarged diameter portion 110 (front welding portion) and the flange 112 or the cylindrical portion 114 (rear welding portion). Further, the thickness of the cylindrical portion 114 is larger than the thickness of other portions in the rear portion 102. In addition, the thickness of the enlarged diameter part 110 (front part welding enforcement site
  • FIG. Welding is performed by irradiating a laser (laser welding). The laser is emitted from a laser head of a laser output device (not shown). The welding may be electron beam welding performed by irradiating an electron beam. Iron (front welding execution site) having a higher melting point than aluminum (rear welding execution site) is on the outside, and laser is first irradiated to the iron.
  • the laser is applied to each of four circumferences (four) around the axis of the tool holder 8.
  • the front-rear length of the contact portion between the front portion 100 and the rear portion 102 (front-rear length of the enlarged diameter portion 110, front-rear length of the cylindrical portion 114) is 12.0 mm (millimeter), and the rear surface of the enlarged diameter portion 110 (front surface of the flange 112) ) And a circumference that is 3.5 mm apart from the circumference.
  • the front and rear length of the enlarged diameter portion 110 (the contact area between the front portion 100 and the rear portion 102) is reduced in size in order to ensure the welding quality by ensuring that the cooling time during welding is as short as possible and to ensure the welding strength.
  • the number of laser irradiation spots is not limited to four and may be three or less or five or more, and the arrangement of laser irradiation spots may be other than equal intervals.
  • the order of laser irradiation may be any, for example, the laser may be sequentially irradiated from the circumference closest to the rear surface of the enlarged diameter portion 110 to the circumference adjacent to the front side, and vice versa. It may be present, or the center circumference may be irradiated first.
  • the laser irradiation is performed in such a manner that the tool holder 8 is fixed to the laser head in a state where the front part 100 and the rear part 102 of the tool holder 8 are combined (the cylindrical part 114 is put in the enlarged diameter part 110). This is done by being relatively rotated (moved) at the rotational speed.
  • the laser head is arranged in a posture inclined (forward inclined) at a predetermined angle to the front side (upstream side) of the rotation direction of the tool holder 8 with respect to a straight line in the radial direction (radial direction) of the tool holder 8. Yes.
  • the forward tilt angle is preferably 20 ° or more and 30 ° or less.
  • the action of the laser passes through the thickness of the enlarged diameter portion 110 (iron) and reaches the upper surface portion of the front portion (aluminum) of the flange 112 (see the dotted line in FIG. 2). It is adjusted so as to be melted at the penetration depth.
  • the penetration depth can be adjusted by the laser output and the relative rotational speed according to the material (iron-aluminum) to be welded and the dimensions (thickness, etc.).
  • the laser output is preferably set to 5 kW (kilowatt) or less from the viewpoint of making it easy to ensure appropriate bonding by preventing the amount of heat input from being too large.
  • the relative rotational speed of the welded article and the laser head is set in accordance with the heat input amount and the welding efficiency, and is preferably 5 m / min (meters per minute) or less. If the penetration depth is too shallow, the joint strength is too weak, and in the case of dissimilar metal welding, the joint strength is weakened even if it is too deep. The case of being too deep will be described below.
  • dissimilar metals are welded, several types of intermetallic compounds are produced depending on the temperature and the ratio of each metal (atomic ratio). In the case of an iron (Fe) -aluminum (Al) binary system, intermetallic compounds such as FeAl, Fe 3 Al, FeAl 2 , Fe 2 Al 5 , and FeAl 3 can be generated.
  • the penetration depth is preferably 0.2 mm or more and 0.3 mm or less.
  • the circumference close to the rear surface of the enlarged diameter portion 110 is welded also at the interface R between the rear surface of the enlarged diameter portion 110 and the front surface of the flange 112. Therefore, a predetermined distance from the interface R is set according to the heat capacity of the welded portion. Placed. By laser irradiation on this circumference, welding at the interface R (by residual heat) and welding at the interface C between the lower surface of the enlarged diameter portion 110 and the upper surface of the cylindrical portion 114 (by direct action) are ensured (two-surface welding). These interfaces C and R intersect (here, orthogonal).
  • the predetermined distance is preferably 400 ⁇ m or more and 600 ⁇ m or less from the viewpoint of securing sufficient bonding strength while reducing the formation of intermetallic compounds even in welding at the interface R between the rear surface of the enlarged diameter portion 110 and the front surface of the flange 112. It is.
  • the direction in which the interface R between the rear surface of the enlarged diameter portion 110 and the front surface of the flange 112 widens (radial direction) and the laser irradiation direction are the same direction (here, parallel). That is, the laser is irradiated so as to be adjacent to the interface R. Therefore, the heat of the laser is evenly applied to the interface, and uniform welding is ensured at the interface R.
  • the hammer drill 1 performs an operation (hammer operation) of hitting a workpiece by the drive conversion mechanism 40 and the hitting mechanism 44 which are mechanisms that generate the hitting force.
  • the first gear 70 of the intermediate shaft 50 rotates the tool holder 8 around the central axis in the front-rear direction after the deceleration via the second gear 72 and rotates to the bit attached to the tool holder 8. Power is granted.
  • the hammer drill 1 performs an operation (drilling operation) for processing a workpiece with a rotational force by a power transmission mechanism 42 that is a mechanism for generating the rotational force.
  • the tool holder 8 which is a component of the hammer drill 1 is formed by welding an iron front portion 100 and an aluminum rear portion 102, and can be reduced in weight compared to a case where all are made of iron, and the hammer drill 1 is reduced in weight. Can do.
  • the tool holder 8 is disposed at the front part away from the center of gravity of the hammer drill 1, and vibration during operation is less likely to occur due to weight reduction, and it is possible to grip more stably.
  • the front portion 100 including the bit mounting portion 92 into which the rear portion of the bit enters is made of iron, it is possible to secure the strength required for the bit mounting portion 92, that is, the strength that can withstand the action received from the bit during processing. it can.
  • the strength required in the cylinder portion 90 that is, the strength required for guiding the forward and backward movement of the piston 58 is ensured.
  • a tool holder 8 having a metal front portion 100 and a metal rear portion 102 having a melting point different from that of the front portion 100 is provided, and the front portion 100 and the rear portion 102 are joined by welding. ing. Therefore, the parts are formed by a combination of different metals, and it is possible to provide the hammer drill 1 having parts having the characteristics (high strength, low weight, etc.) of each metal. Moreover, since welding is laser welding, sufficient strength is ensured even when joining between dissimilar metals.
  • the front part 100 is made of iron (including an iron alloy) and the rear part 102 is made of aluminum (including an aluminum alloy), the conventional iron parts can be reduced in weight while ensuring strength.
  • the penetration depth which is the depth at which the front portion 100 is melted with respect to the rear portion 102 by welding, is 0.2 mm or more and 0.3 mm or less, the joint portion becomes brittle while obtaining sufficient biting. Generation of intermetallic compounds is suppressed and the strength of dissimilar metal bonding is ensured.
  • the front portion 100 and the rear portion 102 are in contact with each other on at least two surfaces (an interface C where the cylindrical surface of the enlarged diameter portion 110 and the cylindrical portion 114 are in contact, and an interface R where the rear surface of the enlarged diameter portion 110 and the front surface of the flange 112 are in contact). And welding is enforced in these 2 surfaces which contact. Therefore, the welding strength is further increased. Furthermore, the thickness of the cylindrical portion 114 (rear welding portion) in the rear portion 112 is larger than the thickness of portions other than the cylindrical portion 114. Therefore, the mechanical strength of the welded portion is improved. In addition, heat generated during welding can be released more quickly, generation of intermetallic compounds can be suppressed, and sufficient strength can be ensured even in dissimilar metal joining.
  • this invention is not limited to the said form,
  • the following changes can be given suitably.
  • Other types of motors such as brushless motors may be used.
  • the configuration of the housing may be variously changed such that the motor housing and the grip portion are integrated, the motor housing and the cylinder housing are integrated, or the cylinder housing is further divided.
  • the number of contact surfaces and welding surfaces of the first metal part and the second metal part, or the number of intermediate shafts and gears is increased or decreased, the number of divisions of the metal part in the part is 3 or more, or the power cord is replaced.
  • the battery connection portion is provided and the battery is driven, the mechanism relating to the drill operation is omitted, and only the mechanism relating to the hammer operation is arranged, or the first metal portion or the second metal portion is other
  • the number of various parts can be adjusted by adjusting the penetration depth, distance from the interface, laser output, and the relative speed between the laser head and the welding target, depending on the characteristics of the formation of intermetallic compounds. Arrangement, presence / absence of installation, material, and the like may be changed as appropriate.
  • a part formed by combining different kinds of metals may be another part instead of the tool holder or together with the tool holder.
  • the present invention can be applied to other types of hammer drills, other electric tools, air-driven tools, cleaners, blowers, garden tools such as garden trimmers and high branch cutters, and the like.
  • the piston and the link may be formed of different metals, and these may be welded.
  • the spindle of the impact driver may be formed by welding two or more metal parts having different melting points.
  • the handle of the high branch cutting hook may be formed by welding of an iron portion and an aluminum portion or the like in order to ensure strength in reducing the weight.
  • the handle of the high branch cutting hook is long, and in order to facilitate the work, it is required to reduce the weight while ensuring the strength.
  • carbon fiber reinforced resin is widely used to meet such demands at a high level. Carbon fiber reinforced resin is expensive, and if composite metal parts are used instead of carbon fiber reinforced resin, It is possible to meet such a request at a lower cost.
  • a part of invention concerning the manufacturing method of electric tool components is put together.
  • a method of manufacturing a power tool part comprising manufacturing a power tool part including the first metal part and the second metal part.
  • a power tool component in which the first metal portion and the second metal portion are firmly coupled to each other is manufactured, and a power tool component having the characteristics of the first metal and the second metal is provided.
  • Manufacturing method of tool parts With this manufacturing method, a conventional iron part can be reduced in weight while ensuring strength.
  • a penetration depth which is a depth by which the first metal portion is melted into the second metal portion by the welding, is 0.2 mm or more and 0.3 mm or less (1) Thru
  • the laser is irradiated from a laser head, Any one of (2) to (6), wherein the laser head is moved relative to the interface at the time of irradiation of the laser and is further inclined to the front side in the moving direction.
  • the manufacturing method of the electric power tool components as described in 2. By this manufacturing method, the situation where smoke during welding blocks the laser is prevented, and high-quality laser welding is provided.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Laser Beam Processing (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Portable Power Tools In General (AREA)

Abstract

L'invention concerne un outil électrique présentant une partie qui a une combinaison de caractéristiques multiples. Un marteau perforateur (1), qui est un exemple de l'outil électrique, est pourvu d'un porte-outil (8) comprenant une section avant (100) qui est constituée de fer (y compris d'alliages de fer) et une section arrière (102) qui est constituée d'aluminium (y compris d'alliages d'aluminium) et qui présente un point de fusion différent de celui de la section avant (100). La section avant (100) et la section arrière (102) sont jointes par soudage. Le soudage est un soudage au laser. De plus, la profondeur de pénétration de la soudure, qui est la profondeur à laquelle la première partie métallique pénètre dans la seconde partie métallique du fait du soudage, est de 0,2 mm à 0,3 mm
PCT/JP2017/014060 2016-06-01 2017-04-04 Outil électrique WO2017208614A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-110376 2016-06-01
JP2016110376A JP2017213659A (ja) 2016-06-01 2016-06-01 電動工具

Publications (1)

Publication Number Publication Date
WO2017208614A1 true WO2017208614A1 (fr) 2017-12-07

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JP (1) JP2017213659A (fr)
WO (1) WO2017208614A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10202379A (ja) * 1997-01-20 1998-08-04 Isuzu Motors Ltd 溶接構造
WO1999022081A1 (fr) * 1997-10-28 1999-05-06 Toto Ltd. Procede de soudure d'un element formant un passage pour le fluide et element formant un passage pour le fluide
JP2001138283A (ja) * 1999-09-22 2001-05-22 Andreas Stihl:Fa 工具ヘッド
JP2006130541A (ja) * 2004-11-08 2006-05-25 Nichirin Co Ltd 鉄系合金部材とアルミニウム系合金部材の異種金属溶接接合体
JP2007130421A (ja) * 2005-11-09 2007-05-31 River Seiko:Kk 内視鏡用部材の連結構造
JP2009202249A (ja) * 2008-02-26 2009-09-10 Hitachi Koki Co Ltd 打込機
JP2011255461A (ja) * 2010-06-09 2011-12-22 Mitsubishi Plastics Inc ワイヤーソー及びそのメインローラー
JP2017080850A (ja) * 2015-10-29 2017-05-18 日立工機株式会社 打込機

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10202379A (ja) * 1997-01-20 1998-08-04 Isuzu Motors Ltd 溶接構造
WO1999022081A1 (fr) * 1997-10-28 1999-05-06 Toto Ltd. Procede de soudure d'un element formant un passage pour le fluide et element formant un passage pour le fluide
JP2001138283A (ja) * 1999-09-22 2001-05-22 Andreas Stihl:Fa 工具ヘッド
JP2006130541A (ja) * 2004-11-08 2006-05-25 Nichirin Co Ltd 鉄系合金部材とアルミニウム系合金部材の異種金属溶接接合体
JP2007130421A (ja) * 2005-11-09 2007-05-31 River Seiko:Kk 内視鏡用部材の連結構造
JP2009202249A (ja) * 2008-02-26 2009-09-10 Hitachi Koki Co Ltd 打込機
JP2011255461A (ja) * 2010-06-09 2011-12-22 Mitsubishi Plastics Inc ワイヤーソー及びそのメインローラー
JP2017080850A (ja) * 2015-10-29 2017-05-18 日立工機株式会社 打込機

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