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JP3602744B2 |
To provide a method for working an inner surface of a cylindrical body to manufacture the cylindrical body with high dimensional accuracy at a low cost, and a working tool used therefor. In working at least one kind of recessed part of a...
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JP2004347134A |
To provide a complex heat exchanger tube superior in heat transfer performance, bending workability, pressure resisting strength and productivity and helpful for smaller and lighter equipment to be used, and its manufacturing method.The ...
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JP2004332943A |
To provide a compound heat transfer pipe and a manufacturing method thereof, having excellent heat transfer performance, bending workability, pressure resistance and productivity, and reducing the size and weight of a device to which the...
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JP2004330208A |
To provide a female screw member, and a method and a device for manufacturing the female screw member which have a simple structure and by which the efficiency of mass production is improved.The female screw member 30 is formed protrusiv...
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JP2004292917A |
To provide a method of producing a copper alloy smooth tube for a heat exchanger and a method of producing a copper alloy internally grooved tube for a heat exchanger by which a copper alloy tube having excellent brazability, and proof s...
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JP2004283863A |
To provide a sealed tubular body whose insertion hole has excellent sealability without subjecting a sealing member to striking, and to provide a method for manufacturing a sealed tubular body.The sealed tubular body comprises a tubular ...
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JP2004278854A |
To provide a double-walled pipe heat exchanger equipped with a reduced fluid resistance and an enhanced performance together with its easiness in manufacturing.The double-walled pipe heat exchanger is structured so that a ridge 3 is form...
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JP3572525B2 |
Two embodiments of a method for forming a banjo type axle housing are disclosed. Initially, one end of a tube is split into upper and lower sides by forming a pair of opposed longitudinally extending slots therein. The sides are spread a...
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JP3559784B2 |
An annular excess portion is disposed, a spline forming male mold is passed through a boss of a sheet metal-made rotary member in which a root portion of the boss and a peripheral portion are previously displaced, and the boss is set to ...
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JP2004243400A |
To provide a forming roll of a special shaped tube with which a layout pattern in the concave parts and the number of the concave parts are freely changeable in addition to that the dimensions of the concave parts can be kept in a prescr...
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JP3551223B2 |
To provide a method for easily forming a finned plate the height of the fine of which is sufficient without costing and by which increase of the size of a rolling device is evaded. Because a lot of fine grooves 13 which are parallel to t...
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JP3549906B2 |
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JP2004148385A |
To achieve a highly precise machining, an efficient production in a short period of time as well as a possible reduction of cost.A split die 3 made of a hard material, which has a main body of mostly cylindrical shape with a hole for thr...
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JP2004122156A |
To provide an apparatus for producing an internally grooved tube in which an internal groove with a stable shape in a longitudinal direction can be formed at a low production cost, and to provide a method for producing an internally groo...
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JP3520224B2 |
To provide an inner face working tool of a cylindrical body capable of working a recessed part such as a V shaped groove, etc., to a cylindrical body inner face, and a working method using the inner face working tool. The inner face work...
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JP3516335B2 |
To provide bead forming metallic patterns which can prevent bead formed sheet metal from warping in spite of the difference of sheet metal mechanical property or dispersion of sheet thickness and can form bead from the same pattern despi...
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JP2004508205A |
A device for preparing pipe segments for joining with mechanical pipe fittings in a piping network is disclosed. The device has a fixed support with support surfaces engageable with the pipe segment, and a movable support, facing the fix...
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JP2004044720A |
To provide an accurate and inexpensive rack shaft that can be manufactured by using inexpensive facilities by manufacturing a rack plate without depending on a machining gear cutting method and a complex forging method and then connectin...
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JP3496444B2 |
To form a dimple uniform in thickness in a tube to be worked by inserting a mandrel in which a recessed groove is formed into the hollow part of the tube to be worked and rotating plural rolls provided with projecting parts (plural balls...
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JP2004501773A |
Special steel press fittings are produced in two process steps, which can be performed simultaneously, or also one after the other. The cut to size blank is widened in a die is upset in order to form the desired pipe connection areas.
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JP3489359B2 |
To increase the height of a fin, to reduce the apex angle of the fin, and to widen the helix angle of the grooves against the tube axis by making the original tube out of one with internal linear grooves or spiral grooves and drawing wit...
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JP2004001039A |
To simplify a screw forming process and to improve durability when forming a screw.An inner tool 30 is constituted of a plurality of inner tool divided parts 31 arranged on the concentric circumference with the circumference of an outer ...
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JP3484942B2 |
To use the tooth end face of a spline tooth for positioning and to prevent the degradation of strength. This forming device is provided with an expansion part 21 to be connected to a first rotary member and a sleeve part 22 to be connect...
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JP3469505B2 |
To provide a method capable of forming a recess having a sharp angle in a hollow tube in which no material is removed, the wall thickness of the tube is kept constant, its outside diameter is not changed and the fiber orientation of meta...
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JP3464666B2 |
To provide a method for indenting a pipe material in which a penetrating quantity is small at the corner parts of the recessed part after processing, and a driving control of a workpiece is easy. The metal pipe material 11 is fixed betwe...
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JP3462427B2 |
To form a uniform thread on a metallic pipe by making the radius of curvature of a tip forming part of plural main forming punches equal to the radius of curvature of the groove part of an objective screw, making the dimension along the ...
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JP2003290822A |
To provide a method and device for manufacturing a lock bolt for civil engineering that has a recess for expansion without performing drawing work to a large machining degree in the center of the tube, with both tube ends left in the rou...
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JP2003290817A |
To provide a manufacturing device for a seamless tube with a grooved inner face with which the seamless tube with the grooved inner face having the large lead angle of the groove is manufactured at high productivity by smoothly rotating ...
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JP2003527970A |
In order to improve a sheet metal forming machine comprising a machine frame, a first roller tool mounted on the machine frame for rotation about a first roller axis, a second roller tool which is rotatable about a second roller axis, in...
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JP3448905B2 |
PURPOSE: To obtain an internally grooved tube of a stable quality by providing an indicating means, by which the prescribed angle of the fixed part for attaching a roll is indicated, thereby facilitating the fine adjustment of a pressing...
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JP2003245724A |
To provide a manual groove forming tool which can form a groove at a joint end of a cylindrical member of a metallic sheet and can allow the simple drawing of the joint end.A body lower rod 2 having a groove-forming recess 6 in its front...
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JP3430851B2 |
To roughly make a groove working quantity uniform in the longitudinal direction of a tube to be worked without increasing drawing force by inserting a working plug, which forms a groove on its outer face, into a hollow part of a tube to ...
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JP3429658B2 |
To provide a method for forming a thick necking which has a sufficient spring effect and excellent in durability and corrosion resistance, to a cylindrical member. In a method for forming a necking to a cylindrical member 34, in which a ...
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JP2003191025A |
To provide a device and a method for forming a side surface of a work with high accuracy.This forming device comprises a first roller 23 group disposed around a work feed shaft 12, and a second roller 33 group disposed around the work fe...
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JP2003170236A |
To provide a cylindrical member having a spline which can be molded in a short period of time and which has a high working accuracy and to provide an apparatus and a method for manufacturing the same.The manufacturing apparatus 1 manufac...
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JP2003518437A |
A method for fastening a bottom part (40) to a can body (31). The method comprises positioning the bottom part at one end of the can body such that a rim portion of the bottom part is in abutting engagement with a radial flange formed at...
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JP2003151715A |
To improve a forming method of an undercut for preventing a dropping off of a contact spring accommodated in a recessed part.The method for manufacturing a connector is provided with a first terminal having a projected contact part; a se...
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JP3407559B2 |
To shorten the stroke and to firmly and uniformly execute caulking by attaching a caulking receive body on the top end of a piston rod and having a caulking punch to oppose to the caulking receive body on the opposite face of the top end...
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JP3408121B2 |
To enable continuous working using successively proceeding dies of extremely high productivity by fitting a metallic tube between these two dies in a situation that a core die has its diameter contracted and an encircling die has its dia...
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JP2003515454A |
The invention concerns a method comprising the following steps: placing a tube (6) in an opening matrix (2) having an impression (22) corresponding to the desired final external shape; inserting the end (16) of the tube into a cavity (12...
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JP3401848B2 |
PURPOSE: To enable a stable grooving by providing plural second rolls which, receiving a rotational force by coming into contact with plural first rolls, are rotated while revolving on the second circular locus with a radius smaller than...
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JP3391167B2 |
To ensure good heat transfer properties and wetting properties of an absorption solution as well as high heat transfer efficiency by forming an acute angle between the side of a corrugated fin and an internal wall surface of a pipe to be...
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JP2003080308A |
To provide a seamless tube which has a smooth outer surface and an inner surface on which a plurality of kinds of grooves are formed, and to provide a method and a device for manufacturing the seamless tube having the grooved inner surfa...
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JP2003062610A |
To manufacture a heat exchanger tube with inclined fins inside efficiently, which has the inclined fins formed on the inside surface and is applied to the heat exchanger for a refrigerator, an air-conditioner or the like.A grooved plug 3...
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JP2003508225A |
The invention relates to a device for creating a recess in a workpiece which has a tool (30) which can be moved forward by a forward feed device (31) in a tool (30) which can be moved forward and which has at least one machining element ...
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JP2003053435A |
To provide a roll grooving device for a pipe which has high durability and excellent tracking performance. This roll grooving device has a grooved roll and backup roll relatively displaced by a feed screw and a backup roll. Grooving of a...
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JP3377884B2 |
A gear teeth forming apparatus is used for forming a plurality of gear teeth on an outer circumferential wall of a pressed drum. The apparatus includes a punch and a plurality of rotational rollers. A plurality of convex/concave portions...
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JP2002372390A |
To provide a heat exchanger tube for falling film evaporator which is improved in heat transfer ability by improving the wet-spreading property of a refrigerant on the external surface of the heat exchanger tube, particularly, along the ...
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JP2002361332A |
To provide a support roll for forming a platy material with fin capable of positively forming the prescribed height of a fin by suppressing a forward slip or broadening even if a workpiece is of copper platy material excellent in ductili...
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JP2002346642A |
To bring a starting point of a cylinder groove close to a closed end of cylinder in a gas cylinder device. In a forming method of the cylinder groove 1A of the gas cylinder device, a guiding member 20 is moved in the axial direction of t...
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