Daido Steel Co., Ltd.

Canon Kabushiki Kaisha

Honda Motor Co., Ltd.

Denso Corporation

Sintokogio, Ltd.

Daido Tokushuko Kabushiki Kaisha

Toyo Ink Manufacturing Company

Fdk Corporation

Diado Steel Co., Ltd.

Takashi Kano

Makoto Hobo

Shinichiro Kato

Takahiro Miyazaki

Kazuhiko Ishiwata

Yutaka Kurebayashi

Keiichiro Kamiya

Yoshihiro Takitani

Isamu Saito

Kazuhito Watanabe

Toshihiko Horikoshi

Kazuki Nakanishi

Kenji Kitamura

Hideo Shimizu

Takanori Miyake

Yuji Kobayashi

Katsumi Mori

Masaki Shimizu

Yasunari Mizoguchi

Kunihisa Sekiguchi

Hisashi Endo

Kazuhisa Ishida

Masakazu Hayaishi

Yasuhiro Hazama

Shinichi Azuma

Kazuta Takeno

Junya Asaoka

Atsushi Hattori

Kiyoshi Okumura

Satoru Ujihashi

Makio Kato

Ryohei Ishikura

A charging circuit includes a first power source circuit that supplies charging power to secondary batteries; a switch that controls the supply of the power; and a control device that performs switching control of the switch. The control device detects a voltage difference between the secondary batteries before starting charging; starts a timer and starts serial charging of the secondary batteries; on the condition that the voltage difference before the charging has been equal to or larger than a first threshold, if respective voltage values of the secondary batteries have both become equal to or larger than a second threshold before the timer expires, shortens a remaining time on the timer at that time point; and finishes the serial charging of the secondary batteries at the earlier of a time point when the secondary batteries have both become fully charged, or a time point when the timer has expired.

Charging circuit

A nitrocarburized crankshaft member made of a steel that includes C in an amount by weight of 0.25 to 0.32% as a required element and an optional element that may be included, and Fe and inevitable impurities in a remaining portion. The steel-made crankshaft member mainly includes ferrite and perlite, wherein at least a portion of the steel surface thereof having a ferrite surface area of 50% or greater is imparted with a nitrocarburized hard layer. The nitrocarburized hard layer includes a surface compound layer suppressed to a thickness of 10 to 35 &#x3bc;m, and a nitrogen diffusion zone below the surface compound layer having a diffusion depth of 700 &#x3bc;m or greater. The steel includes C, Si, Mn, Cu, Ni, and Cr as the required elements and Mo, N, s-Al, and Ti as the optional elements.

Nitrocarburized crankshaft member and steel for nitrocarburized crankshafts

The invention relates to a crankshaft member having high fatigue strength and good bending correctability, and its method of manufacture. The steel made crankshaft member mainly consists of a two-phase structure of ferrite and perlite. The steel includes C, Ni, Mn, and Cr as required elements and Si, Cu, Mo, Ti, V, Nb, Ca, and S as optional elements that may be included, in the amounts of C within the range of 0.20 to 0.50 wt %, Si within the range of 0 to 0.6 wt %, Mn within the range of 0.5 to 1.5 wt %, Cu within the range of 0 to 0.7 wt %, Ni within the range of 0.05 to 1.5 wt %, Cr within the range of 0.05 to 0.45 wt %, and Mo within the range of 0 to 0.5 wt % to satisfy the condition 115&#x2267;70C+8Si+23Mn+11Cu+128Cr+83Mo&#x2267;50. A portion of the member surface is provided at least with a hard nitride layer having an average hardness within the range of 300 to 450 HV. Lamellar spacing of the perlite is 0.3 &#x3bc;m or less.

Manufacturing method for a crankshaft member

The object of the present invention is to provide a method for shot peening by which a compressive residual stress that is higher than any achieved by the conventional method can be achieved while the thickness of the processed material that is scraped is suppressed. The method is characterized in that the shot materials are shot against the processed material that has the hardness of 750 HV or more that is calculated from equations (1) to (3) below. The shot materials have Vickers hardness that is higher than the hardness of the processed material by 50 HV to 250 HV. The thickness of the processed material that is to be scraped is suppressed to 5 &#x3bc;m or less.HV()={(C)&#x2212;()}(1&#x2212;&#x3b3;/100)+400&#xd7;&#x3b3;/100&#x2003;&#x2003;Equation (1)(C)=&#x2212;660C+1373C+278&#x2003;&#x2003;Equation (2)()=0.05(log+17)&#x2212;318&#x2003;&#x2003;Equation (3)where C denotes the C (carbon) content in the surface layer that is achieved by carburizing (mass %), T denotes the tempering temperature (K), t denotes the tempering time (hr), and &#x3b3;denotes the amount of residual austenite (vol. %).

Method for shot peening

A carburized component with a base metal containing 0.10% to 0.40% C, 0.05% to 0.8% Si, 0.35% to 1.2% Mn, 2.0% to 5.0% Cr, remnant including Fe and inevitable impurities, a carburized layer formed on a surface layer portion, a grain boundary oxidized layer depth of 1 &#x3bc;m or less on a surface thereof and an average C concentration of 1.5% to 4.0% at 25 &#x3bc;m deep from the surface, and adjusted so as to satisfy 1.76 SC&#x2212;1.06&#x3c;WCr&#x3c;1.76 SC+0.94, wherein said carburized layer also has a carbide area ratio of 15% to 60% at 25 &#x3bc;m deep from the surface, a fine carbide area ratio, a dimension of 0.5 &#x3bc;m to 10 &#x3bc;m, and constitutes 80% or more of the total and 70% by volume or more of said fine carbide is MC type.

Carburized component and manufacturing method thereof

A design support apparatus that can easily verify the conveyance design for a flexible medium based on input design information. A transit time is calculated when a flexible medium passes a characteristic point on a conveying path based a conveying conditions that are set.

Design support apparatus and design support method therefor

It is an object of the present invention to provide a simulation tool, which can overcome complications of examinations by simulations as described above and can provide a designer with easy examinations. A simulation based on a design parameter of a unit is implemented. Furthermore, a simulation result implemented by the control device is output on a display screen as a graph. Then, the unit design parameter is corrected in accordance with a correction in the graph displayed on the display screen. Thus, the simulation can be retried easily.

Information processor for supporting a sheet feeding machine design

The present invention is to provide a free-cutting steel capable of suppressing production of coarse inclusions, and having a high fatigue strength and a desirable machinability. The free-cutting steel aimed at solving the foregoing problems consists essentially of, in % by mass, C: 0.1-0.5%, Si: 0.05-2.5%, Mn: 0.1-3.5%, S: 0.0005-0.004%, Al: 0.01-0.06%, Ti: 0.003-0.01%, O: up to 0.0015%, N: 0.003-0.01%, Bi: 0.015-0.025%, and the balance of Fe and inevitable impurities, wherein the formula (1) below is satisfied:&#x2212;4.8&#x2266;log(([0.0015)&#xd7;[)&#x2266;&#x2212;4.3. &#x2003;&#x2003;formula (1)

Free-cutting steel and fuel injection system component using the same

The invention provides an aided design apparatus including a output element for outputting data of an attribute name associated with an attribute group of a part used for transporting a sheet along with three-dimensional shape data of the part. The invention further provides a related aided design method and a recording medium for recording a program for carrying out the method, wherein the data of parts used in a simulation for paper transportation can be easily exchanged.

Aided design apparatus, aided design method, and recording medium for recording program for carrying out the method

Disclosed is a free-cutting steel for machine structural use which always exhibits desired machinability, particularly, machinability by cutting with cemented carbide tools. This free-cutting steel is produced by preparing a molten alloy of the composition consisting essentially of, by weight %, C: 0.05-0.8%, Si: 0.01-2.5%, Mn: 0.1-3.5% and O: 0.0005-0.01%, the balance being Fe and inevitable, and adjusting the addition amounts of Al and Ca in such a manner as to satisfy the above ranges, S: 0.01-0.2%, Al: 0.001-0.020% and Ca: 0.0005-0.02%, and the conditions of &lsqb;S&rsqb;/&lsqb;O&rsqb;: 8-40 &lsqb;Ca&rsqb;&times;&lsqb;S&rsqb;: 1&times;10 &minus;1&times;10 &lsqb;Ca&rsqb;/&lsqb;S&rsqb;: 0.01-20 and &lsqb;Al&rsqb;: 0.001-0.020% to obtain a steel characterized in that the area in microscopic field occupied by the sulfide inclusions containing Ca of 1.0% or more neighboring to oxide inclusions containing CaO of 8-62% is 2.0&times;10 mm or more per 3.5 mm .

Free-cutting steel for machine structural use having good machinability in cutting by cemented carbide tool

Disclosed is a steel for machine structural use having good machinability and chip-breakability as well as a method of producing the steel. The steel consists essentially of, by wt. %, C: 0.05-0.8%, Si: 0.01-2.0%, Mn: 0.1-3.5%, S: 0.01-0.2%, Al: 0.001-0.020%, Ca: 0.0005-0.02%, O: 0.0005-0.01% and N: 0.001-0.04%, and further, one or both of Ti: 0.002-0.010% and Zr: 0.002-0.025%, the balance being Fe and inevitable impurities. At production of the steel controlled deoxidization is conducted by operation meeting certain conditions so that at least a certain amount of &ldquo;duplex inclusion&rdquo; having a specific chemical composition may be formed, and Ti and/or Zr is added to precipitate finely dispersed MnS inclusion particles with nuclei of Ti-oxide and/or Zr-oxide. The finely dispersed MnS inclusions must share a determined part of the total sulfide inclusions.

Steel for machine structural use having good machinability and chip-breakability

A process for producing a metal phthalocyanine pigment which comprises the steps of: reacting phthalic anhydride or a derivative thereof with urea or a derivative thereof with heating in the presence of a catalyst either in the presence or absence of an organic solvent; adding to the reaction mixture of the preceding step a metal or its compound capable of constituting the core of the metal phthalocyanine either alone or together with urea or a derivative thereof, without isolating the reaction product from the reaction mixture of the preceding step; and allowing the reaction mixture to react while simultaneously applying a mechanical grinding force in the presence or absence of a grinding agent.

Process for producing metal phthalocyanine pigment

Growing community of inventors

Tokyo, Japan

Takashi Kano