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JP5111000B2 |
To provide a working method which can inhibit a welded part at a pipe end from being cracked, when forming a reduced diameter portion by abutting a working roller on an end part of a welded pipe of ferritic stainless steel. When forming ...
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JP5099955B2 |
The invention relates to a forming machine at least provided with a clamping device for clamping a hollow workpiece having at least one open end and a first forming tool which can be placed into contact with the outer surface of the work...
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JP5097757B2 |
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JP3180155U |
To provide a pipe expansion sleeve capable of expanding a pipe having a pipe diameter of 6 mm or more and 8 mm or less. A tube expansion sleeve includes a cap 2, a tube expansion head 3, and a circular spring 4, and is mounted on a tube ...
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JP5083925B1 |
To more easily manufacture a crankshaft having a reduced diameter eccentric portion formed at one end and hollow holes penetrating both ends. A solid closed portion eccentric in the eccentric direction by closing the first end side of th...
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JP5080613B2 |
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JP5057865B2 |
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JP5050382B2 |
An apparatus for sizing a pipe end comprising: a plug 3 for sizing the pipe end; a chuck 2 for clamping the pipe; and shifting means for shifting the position of the plug 3 and/ the chuck 2, which are placed successively from the end of ...
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JP5052858B2 |
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JP5035489B1 |
The pipe end correction method of a seamless pipe for correcting an inner diameter of pipe end of a seamless pipe made of a high Cr stainless steel containing 8 to 35 mass% Cr, and 0.1 to 10 mass% Ni includes: a pipe end correction step,...
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JP2012166258A |
To provide a method for manufacturing a tube, by which it is possible to easily obtain a tube having a sufficiently long folded-back tube part.In manufacturing a tube 2 comprising a main tube part 10 and a folded-back tube part 11 folded...
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JP2012161844A |
To provide a more economic method of providing beverage containers having an expanded diameter portion, wherein the method is easily incorporated into an in-line process.An expansion die 5 for manufacturing metal containers includes a wo...
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JP5013520B2 |
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JP4983053B2 |
The present invention provides a mechanical pipe-end expander comprising a cone and a die having tapered wedge bodies whose outer radius is larger towards a flangeless end direction from a flange end, wherein a pipe-end zone is expanded ...
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JP4984053B2 |
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JP4979057B2 |
To provide a forming apparatus with which a plurality of annular bulged parts is formed in a terminal part of a pipe in one step without scratching the pipe. In the forming apparatus, a pair of divided fixed dies for holding the pipe and...
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JP2012117233A |
To provide a joint structure of a steel pipe pile, which enables the upper and lower steel pipe piles to be connected together by simple work on a job site and which enables the high-accuracy and high-reliability connection of the steel ...
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JP4959388B2 |
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JP4928714B2 |
A primary processing tool (3A) is placed into contact with a workpiece before moving the workpiece in a direction along rotation axis. A secondary processing tool (3B) is made to contact the same workpiece while set behind the primary wo...
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JP4919416B2 |
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JP2012066271A |
To efficiently perform the setup when forming metal pipes having a plurality of kinds of shapes or sizes by the press forming.Press forming apparatuses 10, 11 of a metal pipe 90 includes holding dies 20a, 20b for holding one end 90b in t...
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JP2012020299A |
To provide a method and a processing die, for shaping a high-accuracy square part when extendedly shaping the square part in an end part of a cross-sectionally circular pipe.In this processing die forming the square part by externally in...
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JP4868972B2 |
A closing device 100 which presses a die 2 against a rotating pipe body 1 such that an open end portion of the pipe body 1 is plastically closed by the die 2 includes a cored bar 3 inserted into the pipe body 1 to close the open end port...
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JP4851646B2 |
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JP4836478B2 |
A closing machine (1) for closing a rotating work piece (9) by pressing a heated die (4) against the work piece (9) comprises an air purge box (510) which opens onto the vicinity of the work piece (9), air supply means for supplying air ...
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JP4838545B2 |
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JP4822928B2 |
The present invention relates to a molding method of reducing a diameter in an end portion of a metal tube to be characterized in having a step of rotating a metal tube around an axial core or rotating a frame in which a plurality of rin...
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JP4815988B2 |
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JP4806534B2 |
A closing machine includes left and right chuck spindles (20) for driving a work piece (9) to rotate, a chuck spindle moving device (30) which moves the respective chuck spindles (20) in a horizontal direction orthogonal to a rotary axis...
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JP2011194469A |
To achieve high strength and wall thickness reduction of automobile components by providing a high-strength steel pipe of TS980 MPa class or above by the squeezing-contraction work.In the squeezing-contraction processing method for squee...
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JP4785444B2 |
To reduce the cost required to provide an extended part by avoiding the increase of the number of components by making the extended part so as to be formed integrally in the end part of a case for monolithic catalysts. A first region 20 ...
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JP2011185114A |
To secure the degree of freedom and facilitation in design of a front and a rear parts of a cleaning device for an automobile by reducing an error due to expansion of a cylindrical body in machining for reducing the diameter.The cylindri...
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JP4775840B2 |
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JP4759763B2 |
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JP4729170B2 |
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JP4721748B2 |
A closing machine (1) for closing an open end of a work piece (9) by pressing a die (4) against the work piece (9) rotating about an axial center comprises a chuck spindle (20) that drives the work piece (9) to rotate, a chuck sliding su...
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JP4713528B2 |
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JP2011518043A |
The invention relates to a method for radially expanding a container body, comprising the steps of: i) providing a cylindrical container body (1) having a longitudinal weld seam; ii) providing the container body (1) at least one end with...
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JP4704568B2 |
A method and apparatus for sealing the net shape of the end of a final product tube to eliminate or minimize scrap for a wide range of shapes of the end of the product. A sealing tool has a neck, and a coining portion comprising a should...
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JP4698890B2 |
A revolution center line (C) of a roll (R) is made eccentric with respect to an axis (L) of an elliptic tube (1). The eccentric amount epsilon is set such that when the revolution radius of the roll (R) is gradually reduced from a state ...
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JP4695751B2 |
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JP4693860B2 |
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JP4683519B2 |
To provide an exhaust system component having a small diameter neck part capable of being suitably connected to another component on an end part of a tubular member, and a producing method thereof. This exhaust system component is integr...
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JP4685055B2 |
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JP4667683B2 |
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JP4656980B2 |
In a closing machine (1), an inner diameter chuck (8) that grips an inner peripheral surface of a work piece (9), a work piece (9) introducing device that moves the inner diameter chuck (8) in a Y axis direction of the work piece (9), an...
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JP2011045930A |
To provide a sealing method which eliminates scrap or minimizes the quantity of the scrap.The invention relates to a method for sealing a net shape on the end of an end-product tube 30 against the end of shapes in a wide range of product...
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JP4647056B2 |
To provide a forming method and an apparatus therefor to reduce an end part of a tube of oval cross section without causing deformation except a reducing part. A converter main body 11 (tube) of oval cross section is held with a chuck 32...
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JP4647140B2 |
At the time of spinning a tip reduced portion 3, an angle of inclination of the outer periphery of the tip reduced portion 3 with respect to an axis of a tube stock 2 is increased on a center side of the tube stock 2 and reduced on an en...
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JP4649255B2 |
In a closing machine (1) for closing an open end of a work piece (9) by pressing a die (4) heated by a high frequency heating device (2) against the work piece (9) rotating about an axial center, the die (4) comprises a die main body (60...
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