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JPH04197529A |
PURPOSE: To manufacture the spiral tube without flattening even if it is a thin wall by freezing the metallic straight tube filled with liquid, clamping the turning part between the winding roller and the bending roller and winding it wi...
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JPH0434913B2 |
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JPH0431765B2 |
Disclosed is a pipe bending machine which for the purpose of increasing the freedom of bending operation, is provided with a stand which supports longitudinally extending flat supporting beam of a relatively low height. The forwardly pro...
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JPH0429445B2 |
The guide tube (16) is formed with a longitudinal slit which can be bent about a bending drum (6) of standard construction. In order to additionally introduce a longitudinal or spiral twist, a twisting element can be clamped about the tu...
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JPH0454515U |
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JPH04135020A |
PURPOSE: To obtain the bent products without dust and stain by operating the fluid which exists in the two spaces in the pipe divided with the core metal inserted as the carrying medium of dust and stain, generating the pressure differen...
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JPH0415370Y2 |
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JPH0439511U |
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JPH0491823A |
PURPOSE: To improve forming quality, formability and productivity in a short bent tube and to reduce the maintenance cost of a forming device by inserting a mandrel into a bent through-hole formed by combining a movable die and fixed die...
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JPH0481228A |
PURPOSE: To remove the dust at the time of tube bending by forcibly feeding the fluid into the path provided at the core metal for bending from the hollow part of the holding tool. CONSTITUTION: The path (a) to remove the dust is provide...
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JPH0481229A |
PURPOSE: To carry out a small curvature radius bending by setting many cut grooves in the circumferential direction on the outer circumferential part of the mandrel body made of the elastic material fittable to the inner circumferential ...
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JPH049607B2 |
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JPH0413432A |
PURPOSE: To manufacture the metallic spiral coil pipe having high accuracy by driving mutually a take-up roller and a bending roller in the opposite directions, bending a metallic straight pipe, while guiding it by a guide groove of the ...
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JPH04730B2 |
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JPH03297520A |
PURPOSE: To prevent the generation of the crack of pipe end and the buckling of inner pipe at the correcting time by fitting the constricting pipe inside the end part of double tube and forming on the manufacturing method for the elbow o...
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JPH03297519A |
PURPOSE: To prevent the deforming of opening caused with bending by bending the material to be formed to the prescribed shape so as to be bent and deformed with the opening in a flat plane in the state of the core material of elastic mat...
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JPH0371925B2 |
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JPH03248719A |
PURPOSE: To easily form the prescribed bent shape with high accuracy by moving the moving roll successively toward the axially longitudinal direction of the bar like member, and also moving the moving roll so as to make its locus to the ...
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JPH03238123A |
PURPOSE: To press a pipe to the required radius of curvature of bend without damaging on the outer peripheral surface of the pipe specifying the surface roughness of the clamping surface of the fastening die with the mean roughness of th...
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JPH03216217A |
PURPOSE: To improve the working efficiency by arranging the stopper having a hole which can pass a mandrel, and can't pass the bent pipe between a supporting stand and an exit side of a bent hole. CONSTITUTION: This mandrel 7 attached to...
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JPH03193220A |
PURPOSE: To prevent the generation of wrinkles or the deformation of worked section on the case of pipe bending work by making the whole outer peripheral shape of the divided core metal components at the deformed time of the divided core...
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JPH03124321A |
PURPOSE: To perform the manufacture of a pipe stock in a short time by providing stepped parts which can be engaged with the different level parts in one end part of the pipe in the pipe holding parts of a moving die and moving clamp and...
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JPH0394922A |
PURPOSE: To easily execute the bending work without making the pipe flat by filling the steel ball coated with a water soluble substance, executing the bending work, after then, washing inside of the pipe, removing the coating on the ste...
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JPH0381018A |
PURPOSE: To enable to a potential damage near a bend in the tube minimum by coupling a first axial line pressure device to an unrotatable device and a second axial line pressure device to a collet device and operating them to press the t...
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JPH0371928A |
PURPOSE: To prevent failures and defects such as wrinkles, closings, neckings, etc., from being generated by heating a bending part and cooling a bent part at a bending time. CONSTITUTION: A rotatable tube 21 is inserted loosely into the...
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JPH0318967B2 |
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JPH039855Y2 |
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JPH0316204B2 |
The present invention relates to a curved pipe manufacturing method comprising the steps of: normally inserting a curved mandrel (7) into a curved cavity (4) of a fixed die (1) having an entrance opening (2) and an exit opening (3), the ...
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JPH0335821A |
PURPOSE: To prevent the generation of flaw on the bending surface of pressurized contact for the work by setting the elastic supporting member elastically deformable at one part of the hard bending surface of pressurized contact of the s...
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JPH0310409B2 |
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JPH032328Y2 |
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JPH033538B2 |
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JPH03138B2 |
PURPOSE:To prevent the defect of narrowing the inner diameter of a pipe with the thickness of a cross pipe being bulged to the inner side and to uniformize the flow by using the die formed with the recess inclined so as to become deeper ...
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JPH0262089B2 |
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JPH0262090B2 |
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JPH0260413B2 |
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JPH0257454B2 |
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JPH0257455B2 |
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JPH0257456B2 |
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JPH0251725B2 |
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JPH02128896U |
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JPH0245930B2 |
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JPH0237458Y2 |
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JPH0237457Y2 |
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JPH02235523A |
PURPOSE: To form a tube stock without deforming its tip part by arranging a clamping mandrel capable of advancing or separating to or from the tube tip engaging with a clamping die on the side of the clamping die and advancing the clampi...
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JPH02220718A |
PURPOSE: To execute bending which requires no skill, and scarcely generates an uneven metal and a fold by inserting a coil spring ito a bend part of a lead pipe, inserting a jig consisting of a special cylindrical body and a lever along ...
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JPH02207924A |
PURPOSE: To bend a pipe without breaking or flattening it even in the case of a small bend radius by bringing a mandrel to stroke reciprocating motion of a small quantity, while a bending die is being turned. CONSTITUTION: A mandrel 13 i...
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JPH0236328B2 |
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JPH0235610B2 |
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JPH02142623A |
PURPOSE: To drastically reduce the generation of defectives in bending and cutting off of tubes by introducing lubricating fluid from the ends of the long side tubes immediately before or before bending work is started. CONSTITUTION: In ...
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