WO2008013214A1 - Détecteur de contact et son aiguille de détection - Google Patents

Détecteur de contact et son aiguille de détection Download PDF

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Publication number
WO2008013214A1
WO2008013214A1 PCT/JP2007/064638 JP2007064638W WO2008013214A1 WO 2008013214 A1 WO2008013214 A1 WO 2008013214A1 JP 2007064638 W JP2007064638 W JP 2007064638W WO 2008013214 A1 WO2008013214 A1 WO 2008013214A1
Authority
WO
WIPO (PCT)
Prior art keywords
detection needle
contact
detector
contact detector
workpiece
Prior art date
Application number
PCT/JP2007/064638
Other languages
English (en)
Japanese (ja)
Inventor
Norio Fukuhisa
Original Assignee
Nisshin Sangyo Co., Ltd.
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 Nisshin Sangyo Co., Ltd. filed Critical Nisshin Sangyo Co., Ltd.
Publication of WO2008013214A1 publication Critical patent/WO2008013214A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/004—Measuring arrangements characterised by the use of mechanical techniques for measuring coordinates of points
    • G01B5/008—Measuring arrangements characterised by the use of mechanical techniques for measuring coordinates of points using coordinate measuring machines
    • G01B5/012—Contact-making feeler heads therefor
    • G01B5/016—Constructional details of contacts

Definitions

  • the present invention relates to a contact detector and its detection needle. For example, the relative position relationship between a tool or a tool mounting shaft of a machine tool and a workpiece is detected. It is related with the apparatus which detects by making it, and its detection needle
  • a contact detector that is mounted on a machine tool and detects the position of a workpiece by contact includes a detection needle that is displaceable and held in a predetermined stable position. As shown in Fig. 3, this type of contact detector is generally used by attaching the main body to the tool holder of the machine tool and attaching the main body to the workpiece with a magnet or the like.
  • 10 is a tool table of a machine tool
  • 11 is a work table
  • 6 is a contact detector mounted on the tool table
  • 1 is a detection needle thereof
  • 12 is a work attached to the table 11.
  • the detection needle 1 of the contact detector shown in the figure has three support legs 15 extending radially from the base end thereof. Each of the support legs 15 is pressed by a spring 18 into a recess formed between a set of two balls 17 fixed to the cradle 16. The detection needle 1 is held at a stable position by the three support legs 15 being supported by three pairs of balls.
  • the contact detector shown in FIG. 3 is an external contact type contact detector. That is, when the detection needle 1 and the workpiece 12 come into contact with each other, the detector detects contact by electrically connecting them.
  • the detection needle 1 is held in an electrically insulated state with respect to the metal main body case 20 by using, for example, the cradle 16 and the spring receiver 19 as insulating materials.
  • an energization detector 21 such as a transmitter that emits a radio signal when the LED is energized and a battery 22 are connected in series between the detection needle 1 and the body case 20. It is provided.
  • the machine tool body is a conductor
  • the detection needle 1 comes into contact with the workpiece 12
  • the detection needle 1 and the main body case 20 of the contact detector are connected to the workpiece 12 and the workpiece. It is electrically connected through the machine body.
  • the battery and energization detector 21 are connected in series. The connected circuit becomes conductive, a current flows through the energization detector 21 and a signal is generated, and contact between the detection needle 1 and the workpiece 12 is detected.
  • the detection needle of this type of contact detector is required to be an electrical conductor, inexpensive, and have the necessary hardness and wear resistance. Therefore, as a material for the detection needle 1, a bearing steel that exhibits excellent mechanical properties due to good hardenability and quenching and tempering is often used.
  • the detection needle When the detection of the workpiece is repeatedly performed by the contact detector, the detection needle gradually becomes magnetized due to the detection needle repeating the energized state and the non-energized state. For this reason, chips generated by cutting work adhere to the detection needle and enter the gap between the detection needle and the workpiece or tool when the position is detected, resulting in measurement errors.
  • the detection needle is made of a non-magnetic metal material such as austenitic stainless steel or duralumin, this problem can be solved. However, a new problem arises that non-magnetic metal materials wear and deform due to repeated contact with workpieces and tools with low hardness, resulting in measurement errors.
  • the applicant of this application disclosed in Japanese Patent Publication No. 2000-292114 is a non-magnetic material in which about 6 to 16% of nickel is mixed with tungsten carbide as the binder at the contact portion of the detection needle tip. Propose to make it!
  • the non-magnetic detection needle proposed in this publication has high hardness and durability, and does not cause measurement errors due to magnetization and wear.
  • the following document 1 shows austenitic precipitation hardened stainless steel using precipitation of vanadium carbide (alloy name: A286, composition: 0 ⁇ 05C-0. 6Si— 1.5). Mn-25Ni-15Cr-l. 3Mo— 2. ITi— 0.2A1— 0.28V— 0.001B, solution treatment: 980 ° CX for 1 hour, hardening treatment: 718 ° CX for 16 hours).
  • Precipitation hardening type austenitic stainless steels are known to be excellent in strength and corrosion resistance at high temperatures, used as heat resistant steels, and also known as excellent low temperature materials.
  • Non-Patent Document 1 Japan Stainless Steel Association, “Stainless Steel Handbook”, 3rd edition, Nikkan Kogyo Shimbun, January 1995, p.651-652
  • the present invention is non-magnetic and can be provided at a lower cost, can be measured with higher accuracy, has sufficient hardness to withstand repeated contact with a workpiece, and The problem is to obtain a high accuracy of processing and assembly and a detection needle!
  • the present invention achieves the above object by manufacturing a detection needle for a contact detector using precipitation hardening austenitic stainless steel containing vanadium (V), carbon (C) and nickel (Ni) as a composition. It has been solved.
  • the detection needle 1 of the contact detector according to the present invention has a one-piece structure in which the tip 2 and the shaft 3 which are contact parts with a workpiece are cut out from austenitic stainless steel having the above composition.
  • Precipitation hardening type austenitic stainless steel containing vanadium is conventionally known as a non-magnetic material having high strength at high temperatures, but withstands repeated contact with a workpiece when used as a detection needle in a contact detector. Durability has not been known in the past, and there is no literature to predict that!
  • the precipitation hardening type austenitic stainless steel containing vanadium, carbon, and nickel has sufficient hardness to withstand repeated contact with a metal workpiece, and therefore, when used as a detection needle of a contact detector.
  • the inventors have clarified that the detection needle has sufficient durability required by the test of the present inventor.
  • the detection needle of the contact detector according to the invention of the present application is a detection needle of a contact detector that is attached to a tool post or the like of a machine tool and detects contact with the surface of a measurement object. It is made of a precipitation hardening type austenitic stainless steel containing vanadium, carbon and nickel, and is characterized in that the shaft portion 3 and the tip portion 2 in contact with the workpiece have an integrated machined structure.
  • the contact detector according to the invention of claim 2 of the present application is an external contact type contact detector including the detection needle 1 having the above-described configuration, that is, the detection needle is brought into contact with the detection needle 1 and the workpiece.
  • the external contact type contact detector includes a metal case 20 and a detection needle 1 that is electrically insulated from the metal case and biased to a stable position by a spring 18.
  • the stable position is a position where the detection needle always returns when no external force is applied to the detection needle 1.
  • the three support points formed on the cradle 16 and the detection needle 1 are directed toward the support point.
  • a spring 18 that biases the
  • the invention of the present application it is possible to integrally cut the tip portion 2 and the elongated shaft portion 3 that are in contact with the workpiece. Therefore, the manufacturing is easy and the non-magnetic sufficient force and shape accuracy are sufficient. There is an effect that it is possible to provide a detection needle having durability. Further, since the detection needle used in the external contact type contact detector is highly likely to be magnetized, it is particularly effective to use the detection needle of the present invention.
  • FIG. 1 is a side view showing a first embodiment of the detection needle of the present invention.
  • FIG. 2 is a side view showing the second embodiment.
  • FIG. 3 is an explanatory diagram showing the schematic structure and usage of an external contact type contact detector.
  • FIG. 1 is a view showing the detection needle of the first embodiment, in which the tip portion 2 in contact with the workpiece is a cylindrical detection needle.
  • the diameter of the cylindrical tip 2 is 6 mm, the length is 6.5 mm, and the length L of the shaft 3 is 26.5 mm.
  • An attachment portion 5 having a screw 4 is provided at the proximal end of the shaft portion 3.
  • a circumferential groove 7 is provided at a position 8 mm from the base end of the shaft 3 to avoid damaging the main body of the detector 6 when an excessive external force is applied to the detection needle 1.
  • This circumferential groove is a V-section groove with an apex angle of 50 degrees, with the top being an arc with a radius of 0.2 mm, and the diameter of the groove bottom is 2.5 mm.
  • the detection needle in FIG. 2 is a detection needle having a spherical tip 2, the diameter of the tip sphere is 6 mm, the length L of the shaft 3 is 30.76 mm, and the same screw as in the first embodiment.
  • a mounting portion 5 having 4 and a circumferential groove 7 are integrally provided.
  • These detection needles 1 are formed by precipitation hardening type austenitic stainless steel containing vanadium, carbon, and nickel, and the tip 2, the shaft 3, and the mounting 5 including the screw 4 are integrated. is there.
  • the vanadium content in the austenitic stainless steel of this integrally machined detection needle 1 is 1.5 to 2% by weight of carbon for precipitating carbides, which are particularly preferred. It is necessary to contain nickel for maintaining nonmagnetic properties.
  • the material used for the test was heat-quenched at 1182 ° C and age-hardened at 720 ° C for 5 hours. The resulting material has a Rockwell C hardness of about 46, and the detection needle with the shape shown in Figs. 1 and 2 made from this material has sufficient wear resistance against contact with the workpiece. Have sex! /

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

Détecteur destiné à détecter la relation de position relative entre l'outil d'une machine-outil et une pièce en amenant une aiguille de détection fixée sur un support d'outil au contact de la pièce. Son aiguille de détection est également prévue. Une aiguille de détection non magnétique effectue une mesure avec une précision élevée, possède une dureté suffisante pour résister longtemps au contact répété avec une pièce, et présente une précision d'usinage et d'assemblage élevée. Un détecteur de contact équipé de cette aiguille de détection est également prévu. L'aiguille de détection d'un détecteur de contact est produite en acier inoxydable austénitique à durcissement par précipitation contenant du vanadium, du carbone et du nickel. Dans une aiguille de détection (1) d'un détecteur de contact, la partie de pointe (2) devant être en contact avec une pièce et la partie d'arbre (3) possèdent une structure intégrale découpée à partir de l'acier inoxydable austénitique ayant la composition susmentionnée.
PCT/JP2007/064638 2006-07-27 2007-07-26 Détecteur de contact et son aiguille de détection WO2008013214A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-205071 2006-07-27
JP2006205071A JP2009243883A (ja) 2006-07-27 2006-07-27 接触検出器及びその検出針

Publications (1)

Publication Number Publication Date
WO2008013214A1 true WO2008013214A1 (fr) 2008-01-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/064638 WO2008013214A1 (fr) 2006-07-27 2007-07-26 Détecteur de contact et son aiguille de détection

Country Status (2)

Country Link
JP (1) JP2009243883A (fr)
WO (1) WO2008013214A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016223938A (ja) * 2015-06-01 2016-12-28 パナソニックＩｐマネジメント株式会社 スタイラスの製造方法及びスタイラス

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112352135B (zh) 2018-06-12 2023-07-07 株式会社三丰 数字千分尺

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06185908A (ja) * 1992-12-02 1994-07-08 Mitsutoyo Corp 接触式プローブ
JP2000275093A (ja) * 1999-03-24 2000-10-06 Mettler Toledo Ag 精密測定機器用弾性部品およびその製造方法
JP2000292114A (ja) * 1999-04-07 2000-10-20 Nisshin Sangyo Kk 位置検出器及びその接触針

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06185908A (ja) * 1992-12-02 1994-07-08 Mitsutoyo Corp 接触式プローブ
JP2000275093A (ja) * 1999-03-24 2000-10-06 Mettler Toledo Ag 精密測定機器用弾性部品およびその製造方法
JP2000292114A (ja) * 1999-04-07 2000-10-20 Nisshin Sangyo Kk 位置検出器及びその接触針

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JAPAN STAINLESS STEEL ASSOCIATION: "Stainless Hagane Binran", vol. 3RD ED., 24 January 1995, THE NIKKAN KOGYO SHINBUN, LTD., pages: 625, 651, XP003020723 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016223938A (ja) * 2015-06-01 2016-12-28 パナソニックＩｐマネジメント株式会社 スタイラスの製造方法及びスタイラス
TWI705357B (zh) * 2015-06-01 2020-09-21 日商松下知識產權經營股份有限公司 觸針

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Publication number Publication date
JP2009243883A (ja) 2009-10-22

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