WO2002047862A1 - Dispositif de soudage d'un ecrou ou analogue - Google Patents
Dispositif de soudage d'un ecrou ou analogue Download PDFInfo
- Publication number
- WO2002047862A1 WO2002047862A1 PCT/JP2001/010790 JP0110790W WO0247862A1 WO 2002047862 A1 WO2002047862 A1 WO 2002047862A1 JP 0110790 W JP0110790 W JP 0110790W WO 0247862 A1 WO0247862 A1 WO 0247862A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cylinder
- air
- magnetic
- electrode holder
- nut
- Prior art date
Links
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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/14—Projection 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/30—Features relating to electrodes
- B23K11/3009—Pressure electrodes
- B23K11/3018—Cooled pressure electrodes
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/30—Features relating to electrodes
- B23K11/3081—Electrodes with a seam contacting part shaped so as to correspond to the shape of the bond area, e.g. for making an annular bond without relative movement in the longitudinal direction of the seam between the electrode holder and the work
Definitions
- the present invention relates to a technique for preventing poor welding in projection welding of nuts and bolts.
- a contact pin is provided at a lower end of an operating rod for moving a guide bin (positioning pin) up and down with a predetermined interval, and the operating rod and the contact are arranged.
- An abnormality detection circuit is formed between the bottle and the bottle to detect nut set failures.
- the position detector detects the position of the tip of a detection pin (positioning bin) which is connected to the tip of a connecting rod and moves up and down by a cylinder. Detects a defective nut set.
- the connecting rod and the like move up and down to prevent them from tilting, for example, if the gap between the connecting rod and the cylinder hole diameter is reduced, for example, when the air is sent into the cylinder hole to prevent intrusion of the spatter, It is said that air is not flowing smoothly, and fine spatters are likely to enter the lower cylinder through the cylinder hole, etc., causing the cylinder etc. to wear and shrink, or the stroke detection of the cylinder load to go wrong. There is a defect.
- the present invention accurately detects the projecting position of the positioning pin so that welding defects such as nuts can be completely detected, and at the same time, the spatter generated at the time of welding passes through the inside of the cylinder of the holder, thereby lowering the welding position.
- the purpose is to prevent it from getting into the cylinder and to make the equipment compact. Disclosure of the invention
- a welding device such as a nut according to the present invention includes an electrode holder having a double- ⁇ structure in which an inner cylinder and an outer cylinder are fitted and a cooling water passage is formed in a fitting gap between the two.
- a lower electrode coupled to the upper end of the electrode holder and having a through hole at the center; an air cylinder connected to the lower end of the electrode holder;
- a detector for detecting a protruding position of a positioning pin is attached to the air cylinder, and a detector is provided on an upper side inside the inner cylinder of the electrode holder. , Provided with a guide Doringu to guide the vertical movement of the connecting rod, the connecting rod, sent from the air blowing mechanism An air circulating means for circulating the circulated air is formed.
- the air circulating means can be configured by, for example, providing a chamfer on the outer surface of the connecting rod, providing a groove on the outer surface, or providing a hollow portion inside the connecting rod. If a chamfer is provided on the outer surface of the rod, it is preferable to form at least one surface along the axial direction, and to make the other parts beside the chamfer close to the guide ring, so that the inclination of the connecting rod is suppressed, which is preferable. .
- the detector detects the positions of the positioning pins before and after welding, and detects the improper setting of the nut and the poor welding. For example, by controlling this signal with a controller, the occurrence of poor welding occurs.
- the detector for example, a mechanical sensor, an optical sensor, a magnetic sensor, or the like that detects a stroke amount of a cylinder rod, a connecting rod, or the like can be applied.
- An air cylinder connected to the lower end via a connection block; a connection rod provided inside the cylinder of the electrode holder and movable up and down by the operation of the air cylinder; and a connection rod provided at an upper portion of the connection rod.
- a positioning pin whose tip end is allowed to protrude and retract from the through hole of the lower electrode by an up and down movement of the lower electrode; and an airpro mechanism for sending air from the lower side of the electrode holder into the upper part of the cylinder.
- connection block is made of a magnetic material, and insulation treatment is performed between an electrode holder and an air cylinder.
- a magnetic scale is formed on a cylinder rod of the air cylinder.
- the air cylinder is provided with a magnetic detecting element section and an amplifying section for amplifying a signal from the magnetic detecting element section.
- the smell of nut welding is detected.
- the magnetic scale formed on the cylinder rod is detected by air; a magnetic detection element provided on the cylinder side.
- a magnetoresistive sensor that amplifies and processes this signal in the amplifying unit is applied, it is possible to detect stroke with high accuracy, and it is possible to almost completely detect abnormalities such as nuts.
- malfunctions may occur due to the action of external magnetism such as a magnetic field generated by welding current.
- the electrode holder and the air cylinder with a connection block of a magnetic material, an adverse effect of an external magnetic field on the air cylinder is cut off. If they are directly connected by a connecting block, the entire device can be made compact. In addition, by electrically insulating the electrode holder from the air cylinder, it is possible to prevent a situation in which the air cylinder / cylinder rod is corroded due to electrolytic corrosion.
- the magnetic detection element portion a magnetoresistive element or the like that measures a resistance value that changes due to magnetic force is suitable, and the magnetic scale formed on the cylinder rod is, for example, a cylinder rod made of a non-magnetic material. It can be constituted by forming magnetic scales at a predetermined pitch interval, or forming grooves having a role of a non-magnetic material at equal intervals in a cylinder opening of a magnetic material. By making the magnetic scale finer, it is possible to detect a stroke with a fine resolution of, for example, about 0.01 mm.
- insulation treatment is performed between the electrode holder and the air cylinder, a magnetic scale is formed on a cylinder rod of the air cylinder, and a magnetic scale is formed on the air cylinder.
- a magnetic detecting element section for detecting the magnetic field, and an amplifying section for amplifying a signal from the magnetic detecting element section.
- the device is slightly larger than using the connecting block, the adverse effect of the external magnetic field can be easily avoided by adjusting the length of the connecting shaft.
- another welding device such as a nut according to the present invention may be configured such that the magnetic scale is formed, and a magnetic shield is provided by covering a cylinder pad, a magnetic detection element section, and an amplification section with a magnetic material. It is a feature. +
- the magnetic material at this time permalloy, directional silicon steel, and other ferromagnetic materials having high relative permeability to air are preferable.
- the magnetic material and the connection block or the connection shaft are provided with a magnetic scale of a cylinder rod, a magnetic detection element portion, and a magnetic flux density near the amplification portion of 500. It is characterized by being arranged so that it is less than Gauss.
- the connecting block and the magnetic material When using a connecting block, the connecting block and the magnetic material When the connecting shaft is used, the magnetic scale, the magnetic flux density near the magnetic sensing element and the amplifier should be kept below 500 gauss mainly when the connecting shaft is used. Then, the cylinder rod stroke detection will be more accurate, and abnormalities such as nuts can be detected precisely.
- another welding device such as a nut according to the present invention is characterized in that the connecting rod is connected to a tip end of a cylinder opening of the air cylinder via an insulating material.
- a cylinder rod on which the magnetic scale is formed, a magnetic detection element section, and a foreign substance for preventing foreign substances or liquids from entering from the outside around the amplification section is characterized by providing intrusion prevention means.
- a cylinder rod on which a magnetic scale is formed By providing a means for preventing intrusion of foreign matter or the like in this way, a cylinder rod on which a magnetic scale is formed.
- the detection accuracy can be prevented from being degraded, and the durability can be prevented from being deteriorated due to the intrusion.
- the magnetic material for the magnetic shield is also used, and the intrusion from the gap with the cylinder rod is used. It is preferable to provide a sealing member such as an O-ring.
- connection block is provided with an air blow mechanism in the block for removing foreign matter, liquid, and the like that have entered the connection block by air blow.
- another welding device such as a nut according to the present invention may further include: It is characterized by forming a pin connection portion whose connection structure can be changed corresponding to different types of positioning pins having different combination methods.
- FIG. 1 is a longitudinal section of a first embodiment of a welding device for nuts and the like according to the present invention.
- FIG. 2 is a sectional view taken along line AA of FIG.
- FIG. 3 is a diagram showing another configuration example of the connecting rod.
- FIG. 4 is an explanatory diagram showing an example in which another type of positioning pin is connected to the pin connecting portion at the tip of the connecting rod.
- FIG. 5 is an explanatory view showing another configuration example in which a positioning pin is placed on the tip of a connecting rod.
- FIG. 6 is an explanatory diagram of the air supply circuit.
- FIG. 7 is a structural example diagram showing a second embodiment of a welding device such as a nut.
- FIG. 8 is a main part view of a third embodiment of a welding device such as a nut.
- FIG. 9 is an explanatory diagram illustrating an example of position detection of a positioning pin during welding.
- FIG. 10 is an explanatory diagram of an example of bolt welding. BEST MODE FOR CARRYING OUT THE INVENTION
- the welding device 1 for nuts and the like is capable of accurately detecting the projecting position of the positioning pin, and also prevents the spatter and the like generated at the time of welding from entering the cylinder of the holder, thereby improving durability.
- an electrode holder 2 having a double cylindrical structure, a lower electrode 3 coupled to an upper portion of the electrode holder 2, and an insulating material 4 provided below the electrode holder 2.
- the air cylinder 5 is connected through a cylinder rod 5a of the air cylinder 5,
- a connecting rod 7 is connected via an insulating material 6, and a pin connecting portion 10 is provided on an upper portion of the connecting rod 7.
- a ceramic material is connected via a nut seat 8. Locating pin 9 can be mounted.
- a through hole 3 1 ⁇ is formed in the center fc of the lower electrode 3, and a lower end of the through hole 3 h is formed with a tapered opening corresponding to the tapered portion 9 t of the positioning pin 9.
- the electrode holder 2 has a concave groove formed on the outer surface as shown in FIG. 2, and the outer cylinder 12 is fitted in a watertight manner with respect to the outer cylinder 11. (A concave groove of the inner cylinder 11) is formed with a cooling water passage r. As shown in FIG. The water inlet 18 X and the water outlet 18 y are connected.
- the lower electrode 3 is cooled by circulating the cooling water through the cooling water passage r ′ in the electrode holder 2. '.
- a guide ring 13 made of Teflon (registered trademark of DuPont) is attached to the inside of the inner cylinder 1 i of the electrode holder 2 to guide the connecting rod 7 up and down. 7 is vertically moved without tilting.
- the connecting rod 7 is connected to the cylinder rod 5a in an electrically insulated state via an insulating material 6, and as shown in FIG.
- flat chamfers m. 'As air circulating means are formed along the axial direction'.
- the chamfer m allows an air passage to be formed when the air is sent into the cylinder by an air blow mechanism described later.
- the diameter of the connecting rod 7 where the chamfered portion m is not formed is slightly smaller than the inner diameter of the guide ring 13, for example, the clearance between the two is about 1/100 to 5/1 O mm. By making the clearance small, the inclination of the connecting rod 7 is minimized, and the sliding is performed smoothly.
- a pair of chamfers m ' are formed on both sides of the connecting rod 7, but as shown in FIG. 3, it is sufficient that the pair be formed on at least one surface. By forming it on only one surface, the inclination of the connecting rod '7 can be suppressed.
- a groove may be formed on the outer surface.
- An air passage may be used.
- the pin connecting portion 10 at the upper end of the connecting rod 7 has a variable connecting structure for the positioning pin 9.
- the pin connecting portion 10 is connected to the upper end of the connecting rod 7. It comprises an external thread portion 7 a and the nut seat 8. That is, in this embodiment, since the positioning pin 9 is made of ceramic which cannot form a female screw portion, the nut seat 8 is screwed into the male screw portion 7a of the connecting rod 7 as described above. A positioning pin 9 is placed on top of it, and the lower electrode 3 is placed over the positioning pin 9 so that the positioning bin 9 is attached irremovably.
- a female pin such as a metal positioning pin 9 is used.
- the thread can be formed, remove the nut seat 8 and screw the female thread 9 a of the positioning pin 9 directly into the male thread 7 a of the connecting rod 7 as shown in Fig. 4.
- the male thread portion 7a of the connecting rod 7 may be omitted, and the straight climbing positioning pin 9 may be placed on the upper part of the connecting rod 7.
- the positioning pins 9 as shown in FIG. 4 are directly connected, not only the positioning pins 9 can be raised, but also the lowering operation can be directly performed by raising and lowering the cylinder load 5a.
- the metal positioning pin 9 it is preferable to electrically insulate its surface with an insulating paint or the like.
- the insulating material 4 on the upper part of the air cylinder 5 is fixed to the side of the air cylinder 5 by, for example, screws or the like, so that the electrode holder 2 and the air cylinder 5 are electrically insulated.
- a screw member 14 is fixed to the upper part of the center of the insulating member 4 so that the cylinder rod 5a can pass through.
- the electrode member 2 is attached to the screw member 14. .
- the female screw at the lower end is screwed.
- the device is downsized.
- the insulating material 4 is provided with a professional air supply unit i 5 as an air blow mechanism, through which air can be fed into the cylinder from the lower end side of the electrode holder 2 through the professional air supply unit 15. I can do it.
- This air is blown upward from below the inside of the cylinder of the electrode holder 2 to prevent the space generated at the time of welding from entering the air cylinder 5 through the electrode holder 2. At this time, air is smoothly circulated upward through the chamfer m of the connecting rod 7.
- this air circuit is connected from the four-way valve 17 to the expansion side air supply section X, the professional air supply section 15, and the retreat side air supply section y of the air cylinder 5.
- the positioning pin 9 made of ceramics, air blow is performed when the cylinder rod 5a is extended, and when the cylinder rod 5a is retracted, the air blower from the blower supply unit 15 is stopped.
- the positioning pin 9 In the case of the positioning pin 9 with screw holes shown in Fig. 4, the positioning pin 9 is lowered when the cylinder rod 5a is retracted, so that there is no effect even if air blowing is performed constantly. ⁇ ⁇ A detector 6 for detecting the position of the cylinder load 5a (the position of the positioning pin 9) is attached to the side of the air cylinder 5, and this detector 16 is mounted on a counter (not shown). In addition to the connection to the welding unit, the setting of the counter unit detects the defective setting of the nut or the defective welding and controls the welding.
- the detector cannot detect the extension stroke of the cylinder rod.
- the type and the like are arbitrary, and may be, for example, a magnetic sensor, an optical sensor, or another sensor.
- a plate-like work W such as a steel plate on which the lower six for bolt passage is formed on the upper part of the lower kiln electrode 3 and align the prepared hole with the nut N at the top of the plate-like work W
- the air cylinder 5 is extended and the positioning pin 9 is moved up to the maximum stroke as shown in FIG. 9 (a).
- the upper electrode 19 is lowered to press the nut N against the plate work W, and the tip position of the positioning pin 9 at this time is detected by the detector 16.
- the positioning pin 9 is pushed by the nut N and descends, the descending amount of the nut N and the descending amount of the positioning pin 9 match. Therefore, if the distance to the upper surface of the upper surface and the plate-shaped workpiece W nut N at this time was L 2, L ⁇ one L 2 is the same as the drop amount of the positioning pin 9, the value is pre-counter
- the preset value set in the set is within the preset value range, the nut N is determined to be normal, and it is determined that it is in a normal posture and welding is continued. Judge as normal and interrupt welding.
- the current is applied while pressing with the upper electrode 19, and when welding is performed, the protrusion of the nut N melts and the nut N as shown in Fig. 9 (c). And the positioning pin 9 descends, and the end position of the positioning pin 9 at this time is detected by the detector 16.
- the air is sent from the blow air supply section 15 and blows the air above the guide ring 13 through the chamfer m of the connecting rod 7. Then, as shown in FIG. 9 (b), when the upper electrode 19 is lowered to press the nut N against the plate-like work W, the positioning pin 9 is pushed down by the nut N, and A gap is formed between the one-diameter enlarged portion 9t and the through-hole 3h of the lower electrode 3, and air is blown up from the gap. Therefore, the spatter generated during welding does not enter the air cylinder 5 through the cylinder of the electrode holder 2, and for example, damage to the air cylinder 5 can be effectively prevented. .
- the connecting rod 7 and the cylinder rod 5a and the electrode holder 2 and the air cylinder 5 are electrically insulated by the insulating materials 6 and 4, for example, the cylinder rod 5a is electrically eroded. Problems such as wear due to the action are also suppressed, and durability is improved.
- a pin connecting portion 10 is provided at the upper end of the connecting rod 7 to which a positioning pin 9 of a different connection method can be mounted, the degree of freedom in selecting the positioning pin 9 is increased, which is convenient.
- a magnetoresistive sensor utilizing the magnetoresistive effect is used as a detector as described above, it is possible to detect the stroke more precisely. If the influence of the magnetic field generated by the magnetic field affects the detection element, etc., malfunction may occur.Therefore, place the air cylinder 5 at a position away from the energized parts, etc., or use a magnetic shield around the detection element, etc. It is preferable to prevent malfunction by taking measures to cover with the member. Therefore, Fig.
- FIG. 7 shows the use of a magnetoresistive sensor as a detector and the position of the air cylinder 5 as the electrode holder 2
- the first support plate 23 to which the water guide ring 18 is attached, and the insulating second support plate 24 to which the air cylinder 5 is attached are provided. Multiple coupling between the The coupling is performed by the shaft 25, and a certain distance is secured by the connecting shaft 25, so that the magnetic field of a current-carrying part (not shown) connected to the electrode holder 2 does not affect the detector. .
- the connecting shaft 25 itself may be made of an insulating material. Also, the insulation between the second support plate 24 and the air cylinder 5 Materials may be laminated.
- the detector in this case is composed of a magnetic scale formed on the cylinder rod 5a, a magnetic detection element mainly composed of a magnetoresistive element, and an amplification section 26 for amplifying a signal detected by the magnetic detection element.
- the amplifying section 26 is attached to the outside of the air cylinder 5 and the magnetic scale is provided at predetermined intervals on a cylinder rod of a non-magnetic material such as SUS304 or non-ferrous.
- the magnetic detecting element is built in the air cylinder 5 near the cylinder rod.
- the scale ⁇ The magnetic flux density near the magnetic detection element and the amplifier is suppressed to 500 Gauss or less, so that the stroke amount of the cylinder rod can be detected with fine resolution.
- the length of the connecting shaft 25 is determined by the magnetic flux density around the cylinder rod 5 a where the magnetic graduation is formed, the magnetic switching element part, and the amplifying part 26. It is set to be equal to or less than 100 Gauss so as to prevent the magnetic sensor from malfunctioning due to an adverse effect of an external magnetic field.
- the resolution of the stroke detection at this time is about 0 '. 0 1 ⁇ 0'. 0 2 mm. It has been confirmed that malfunctions can be completely prevented when the magnetic flux density is set to 14.5 gauss or less.
- a double cylindrical structure as shown in FIG. 1 may be employed, or a single cylindrical structure may be employed.
- the cylinder rod 5a may be made of a magnetic material instead of a non-magnetic material, and grooves, which serve as a non-magnetic material, may be cut at regular intervals into a scale. good. '
- FIG. 8 employs the same magnetoresistive sensor as in the above-described example, and a connecting block 28 made of a magnetic material and having insulation properties is interposed between the water guide ring 18 and the air cylinder 5.
- a connecting block 28 made of a magnetic material and having insulation properties is interposed between the water guide ring 18 and the air cylinder 5.
- the periphery thereof is covered with the magnetic shield material.
- the surroundings of the cylinder rod 5a on which the magnetic graduation is formed, the magnetic sensing element section, and the amplifying section 26 are covered with a ferromagnetic material 27 so as to block an external magnetic field.
- the magnetic material 27 is also used as a part of a means for preventing foreign matter or liquid from entering the cylinder rod 5a, the magnetic detection element section, and the amplifying section 26. .
- the magnetic detection element section is arranged in the air cylinder 5 in the vicinity of the cylinder rod 5a, and the amplification section 26 is provided outside the EB cylinder 5.
- the connecting block 28 in the case of the present embodiment, a ferromagnetic magnetic material whose surface is subjected to insulation treatment is used, and the connecting block 28 and the magnetic material 2 are used. Due to the magnetic shielding effect of 7, the magnetic flux density around the cylinder pad 5a on which the magnetic scale is formed, the magnetic detecting element section, and the amplifying section 26 is set to be 500 Gauss or less. Also in this case, malfunction can be completely prevented if the magnetic flux density is set to 144 gauss or less.
- the connecting block 28 may be configured by laminating a block of a ferromagnetic magnetic material and an insulating material.
- the electrode holder 2 may have a double cylinder structure as shown in FIG. 1 or a single cylinder structure.
- a water supply ring 18 is provided with a professional air supply section 15 so that the air sent from the professional air supply section 15 can be moved upward. ing. '
- a sealing member 30 capable of sealing a gap with the cylinder rod 5a is provided on the upper side of the inner hole 28h of the connection block 28 as another part of the means for preventing foreign matter or the like from entering.
- the magnetic sensing element, etc. Foreign matter and liquid are prevented from entering, and all the air sent from the blow air supply unit 15 flows upward.
- a seal member 31 that can seal a gap with the cylinder port 5 a is provided at a lower side of the inner hole 28 h of the connection block 28, and is provided inside the air cylinder 5. It is possible to prevent foreign substances, liquids, and the like from entering into the apparatus.
- the connection block 28 is provided with an in-work air pro mechanism 32 that can remove foreign matter, liquid, and the like that have entered the inner hole 28 h.
- the air blow mechanism 32 in the block is provided independently of an air blow mechanism (pro-air supply section 15) for removing foreign matter and the like in the cylinder of the electrode holder 2, and has an inner hole 28 h It has an air supply unit 33 for sending air into the air supply unit and an air discharge unit 34 for discharging the air that has been sent.
- the welding device such as a nut according to the present invention guides a vertically movable rod with a guide ring in a double-tube electrode holder having a cooling water passage formed therein.
- the detector detects the position of the positioning pin located on the top of the rod and controls it.This corrects the problem that the connecting rod tilts when it moves up and down, and accurately detects the positioning accuracy of the positioning pin. It is possible to obtain a synergistic effect of preventing wear of the lower electrode by the cooling effect and improving the positioning accuracy by the detector.
- an air circulation means for circulating air through the connecting rod the air for preventing intrusion of the air can be smoothly circulated, and the electrode holder can be formed. It is possible to effectively prevent spatters from entering the da.
- the electrode holder and the air cylinder are connected by a connection block of a magnetic material, insulation treatment is performed between the electrode holder and the air cylinder, and a magnetoresistive sensor is provided on the air cylinder side, the external magnetic field can be reduced. While avoiding the adverse effects of the above, accurate stroke detection becomes possible, and it is possible to detect nuts and other abnormalities almost completely, and to make the equipment compact. In addition, it is possible to prevent a situation in which the air cylinder / cylinder rod is corroded by electrolytic corrosion.
- the adverse effect of the external magnetic field can be reliably avoided only by adjusting the length of the connecting shaft. I can do it.
- the magnetic detection element, and the amplifier are covered with a magnetic material and magnetically shielded, the adverse effects of the external magnetic field can be further suppressed. it can.
- the magnetic material and the connection block or the connection shaft are arranged such that the magnetic scale of the cylinder rod, the magnetic detection element portion, and the magnetic flux density in the vicinity of the amplification portion are 500 Gauss or less, the cylinder rod Stroke detection becomes more accurate, and abnormalities such as nuts can be detected precisely.
- the connecting rod is connected to the end of the cylinder rod of the air cylinder via an insulating material via an insulating material, it is possible to prevent the cylinder rod, etc., from being corroded by electrolytic corrosion, and to improve durability. . '
- the magnetic detection element section can be provided.
- the accuracy of stroke detection is not affected by foreign matter and the like, and the durability can be improved.
- a pin connecting part with a variable connecting structure More, c to increase the degree of freedom of selection of the positioning pin
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Resistance Welding (AREA)
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002430732A CA2430732A1 (en) | 2000-12-13 | 2001-12-10 | Device for welding nut or the like |
KR10-2003-7007673A KR20030090610A (ko) | 2000-12-13 | 2001-12-10 | 너트등의 용접장치 |
EP01270403A EP1350589A1 (en) | 2000-12-13 | 2001-12-10 | Device for welding nut or the like |
AU2002222597A AU2002222597A1 (en) | 2000-12-13 | 2001-12-10 | Device for welding nut or the like |
JP2002549423A JP3838565B2 (ja) | 2000-12-13 | 2001-12-10 | ナット等溶接装置 |
US10/456,916 US6875946B2 (en) | 2000-12-13 | 2003-06-06 | Device for welding |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000378620 | 2000-12-13 | ||
JP2000-378620 | 2000-12-13 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/456,916 Continuation US6875946B2 (en) | 2000-12-13 | 2003-06-06 | Device for welding |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002047862A1 true WO2002047862A1 (fr) | 2002-06-20 |
Family
ID=18847156
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2001/010790 WO2002047862A1 (fr) | 2000-12-13 | 2001-12-10 | Dispositif de soudage d'un ecrou ou analogue |
Country Status (8)
Country | Link |
---|---|
US (1) | US6875946B2 (ja) |
EP (1) | EP1350589A1 (ja) |
JP (1) | JP3838565B2 (ja) |
KR (1) | KR20030090610A (ja) |
CN (1) | CN1262385C (ja) |
AU (1) | AU2002222597A1 (ja) |
CA (1) | CA2430732A1 (ja) |
WO (1) | WO2002047862A1 (ja) |
Cited By (4)
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CN103071904A (zh) * | 2012-12-25 | 2013-05-01 | 广州松兴电器有限公司 | 汽车行业螺母焊接防反防错及螺栓焊接防错装置 |
JP2017131965A (ja) * | 2016-01-27 | 2017-08-03 | 新光機器株式会社 | ボルトのセット不良検出機能付き電極装置 |
JP2019188466A (ja) * | 2018-04-23 | 2019-10-31 | 新光機器株式会社 | 抵抗溶接用電極チップ |
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US7250585B1 (en) | 2006-05-31 | 2007-07-31 | Honda Motor Co., Ltd. | Robotic welding system and method for welding projection weld nuts |
JP3135271U (ja) * | 2007-06-28 | 2007-09-06 | 株式会社エスエムケイ | 部品溶接装置 |
US20090120922A1 (en) * | 2007-11-09 | 2009-05-14 | Gm Global Technology Operations, Inc. | Ceramic Body and Steel Post Locating Pin Assembly |
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Also Published As
Publication number | Publication date |
---|---|
US20030213779A1 (en) | 2003-11-20 |
CA2430732A1 (en) | 2002-06-20 |
JP3838565B2 (ja) | 2006-10-25 |
CN1262385C (zh) | 2006-07-05 |
CN1479663A (zh) | 2004-03-03 |
EP1350589A1 (en) | 2003-10-08 |
AU2002222597A1 (en) | 2002-06-24 |
KR20030090610A (ko) | 2003-11-28 |
JPWO2002047862A1 (ja) | 2004-04-15 |
US6875946B2 (en) | 2005-04-05 |
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