CN108025342A - The manufacture method of L font square tubes, the manufacture device of L font square tubes and L font square tubes - Google Patents

The manufacture method of L font square tubes, the manufacture device of L font square tubes and L font square tubes Download PDF

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Publication number
CN108025342A
CN108025342A CN201680052469.7A CN201680052469A CN108025342A CN 108025342 A CN108025342 A CN 108025342A CN 201680052469 A CN201680052469 A CN 201680052469A CN 108025342 A CN108025342 A CN 108025342A
Authority
CN
China
Prior art keywords
mentioned
groove portion
bending
square steel
square tube
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201680052469.7A
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Chinese (zh)
Inventor
田上龙司
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Nisshin Co Ltd
Original Assignee
Nisshin Steel 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 Steel Co Ltd filed Critical Nisshin Steel Co Ltd
Publication of CN108025342A publication Critical patent/CN108025342A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/08—Bending by altering the thickness of part of the cross-section of the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/74—Making other particular articles frames for openings, e.g. for windows, doors, handbags
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C3/06—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/30—Columns; Pillars; Struts
    • E04C3/32—Columns; Pillars; Struts of metal
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
    • E04C2003/0465—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section square- or rectangular-shaped

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

Even if the present invention provides the manufacture method of L font square tubes, the manufacture device of L font square tubes and L font square tubes that also ensure that enough intensity without welding.A kind of manufacture method of L fonts square tube (1A) is provided, including：The groove portion formation process of (5) is formed a groove by the way that width of (1a) when (1a) is along this of square steel tube (1) is pressed into another side (1b) side positioned at the dorsal part of above-mentioned one side (1a)；And so that the mode close to each other across the both sides of above-mentioned groove portion (5) of above-mentioned one side (1a) carries out above-mentioned square tube the bending process of bending.

Description

The manufacture method of L font square tubes, the manufacture device of L font square tubes and L font square tubes
Technical field
The manufacture device and L font square tubes of manufacture method, L font square tubes the present invention relates to L font square tubes.
Background technology
Now, as formation structural member of the integral bathroom with the frame of rack, the outer wall panel by pre-assembled house Structural member used in being installed on the spaced walls of beam etc., has used L font square steel tubes.
As the manufacture method of L font square steel tubes, with the following method：Pushed away by the end of the side in two square steel tubes It is depressed into the state of the side of the end of the opposing party and is welded, so that fixed square steel tube.
However, in the method, enough bond strengths are, it is necessary to the end of complete cycle welding square steel tube in order to obtain.If side Cut-out precision, the positioning accuracy of the end of steel pipe are relatively low, even if then being welded, the intensity that can not also be needed sometimes.If Welded, then also dimensional accuracy is reduced because producing the warpage caused by thermal deformation, distortion sometimes.Due to being produced in welding Smog, so also there is operating environment deterioration the problem of point.If moreover, considering Dimensions, corrosion resistance, weld part needs essence Processing, repairing.
Also, it is also proposed following technology：Notch and the progress of V shape are cut in the upper surface of square steel tube and two sides Bending machining, afterwards welds the two sides of abutting to be manufactured (with reference to patent document 1).
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2010-201503 publications
The content of the invention
Problems to be solved by the invention
But in the above prior art, due to cutting the notch of V shape in the upper surface of square steel tube and two sides, So the face without notch in four faces of square steel tube is only a face of bottom surface.Therefore, the cut out portion of square steel tube and its Its position is compared, and intensity significantly reduces.In order to compensate for reducing, it is necessary to be welded to the position after notch is docked for intensity.
So, as described above, dimensional accuracy is reduced because producing the warpage caused by thermal deformation, distortion sometimes.And And due to producing smog in welding, so also there is operating environment deterioration the problem of point.
Even if it is an object of the invention to provide the manufacture for the L font square tubes that also ensure that enough intensity without welding Method, the manufacture device of L font square tubes and L font square tubes.
Solutions to solve the problem
A viewpoint according to the present invention, a kind of manufacture method of L fonts square tube, including：Groove portion formation process, in the work In sequence, by being pressed into width while along this of square tube positioned at another surface side of above-mentioned dorsal part simultaneously come shape Into groove portion；And bending process, in the process, by make above-mentioned one side across the both sides of above-mentioned groove portion it is close to each other in a manner of Bending is carried out to above-mentioned square tube.
It is preferred that in above-mentioned groove portion formation process, by the V words that the pressing component with V word section is pushed in above-mentioned one side The corner in portion forms above-mentioned groove portion.
It is preferred that the angle in the above-mentioned corner of above-mentioned V word section is corresponding with the bending angle of above-mentioned square tube.
It is preferred that include line formation process of buckling before above-mentioned groove portion formation process, in above-mentioned line formation process of buckling, Two sides between above-mentioned one side and above-mentioned another side to above-mentioned square tube are inwards carried out along the length direction of above-mentioned side Press to form line of buckling.
Other viewpoints according to the present invention, a kind of manufacture device of L fonts square tube, including：Groove portion forming apparatus, it passes through Width while along this of square tube is pressed into another surface side positioned at above-mentioned dorsal part simultaneously to form a groove；With And apparatus for bending, it is to make being rolled in a manner of the both sides of above-mentioned groove portion are close to each other to above-mentioned square tube for above-mentioned one side It is curved.
In the L font square tubes of the present invention, square tube is bent over across the groove portion of the width setting along its one side.
The effect of invention is as follows.
Even if in accordance with the invention it is possible to provide the manufacture for the L font square tubes that also ensure that enough intensity without welding Method, the manufacture device of L font square tubes and L font square tubes.
Brief description of the drawings
Fig. 1 is the figure for illustrating to manufacture square steel tube bending the manufacture method of the L font square steel tubes of L font square steel tubes.
Fig. 2 is the schematic diagram for the line forming apparatus of buckling for realizing line formation process of buckling.
Fig. 3 is the schematic diagram for the groove portion forming apparatus for realizing groove portion formation process.
Fig. 4 is the apparatus for bending schematic diagram for realizing bending process.
Fig. 5 is the groove portion formation process by the manufacture method of present embodiment and formed with the square steel in the state of groove portion The photo of pipe.
Fig. 6 is and the bending part of the L font square steel tubes after bending by the bending process of the manufacture method of present embodiment Photo.
Fig. 7 is the figure of the application examples of the bending method for the square steel tube for showing present embodiment, and (a) is to show there is two foldings The figure of the square steel tube of turn of bilge, (b) are the figures for the square steel tube for showing the quadrangle with three bending parts.
Embodiment
Hereinafter, the manufacture method of L fonts square steel tube 1A as an embodiment of the present invention illustrates.Fig. 1 (a) to (d) be the L font square steel tubes 1A for illustrating present embodiment manufacture method figure.
In the manufacture method of L font square steel tubes 1A, by the square steel tube 1 linearly extended shown in (a) of Fig. 1 When 1a is along this, the width of 1a is pressed into positioned at the another side 1b sides of the simultaneously dorsal part of 1a.Thus, such as (c) of Fig. 1 It is shown to form a groove 5.Next, 1 bending of square steel tube is manufactured to the L words of such bending part A shown in (d) with Fig. 1 Shape square steel tube 1A.
In the present embodiment, in L fonts the square steel tube 1 of bending be the steel that section is rectangle hollow square tube. But present embodiment is not limited to steel, be can by bending come the material that is plastically deformed can or Other materials.
In the present embodiment, situation about being rectangle to the section of square steel tube 1 illustrates, but can also be in pros Shape.However, it is preferred to be, the section of square steel tube 1 is rectangle, and the width in the direction of the width of one side 1a and another side 1b Width in the direction of the width than side 1c, 1d is big.
Also, in the following description, the L font square steel to the bending part A for manufacturing with rectangular (90 °) bending The method of pipe 1A illustrates.Can be that acute angle can also be blunt but the bending angle of bending part A is not limited to right angle Angle.
As shown in Figure 1, the manufacture method of the L font square steel tubes 1A of present embodiment includes：Shown in (a) for pressing Fig. 1 Side 1c, 1d of square steel tube 1 set the line formation process ((b) of Fig. 1) of buckling for line 4 of buckling；Press the one side 1a of square steel tube 1 To form a groove 5 groove portion formation process ((c) of Fig. 1)；And the bending process ((d) of Fig. 1) of bending square steel tube 1.
The manufacture method of L font square steel tubes 1A by possess following line forming apparatuses 2 of buckling, groove portion forming apparatus 3 and The manufacture devices 100 of the L font square tubes of apparatus for bending 15 is implemented.But the manufacture of the L font square steel tubes 1A of present embodiment Method is not limited to use the manufacture device 100.
(line formation process of buckling)
As shown in (b) of Fig. 1, line formation process of buckling is that side 1c, the 1d for pressing square steel tube 1 come in side 1c, 1d shape Into the process for line 4 of buckling.
Fig. 2 shows to realize an example of the specific line forming apparatus 2 of buckling for line formation process of buckling.But in side The device that side 1c, 1d of steel pipe 1 form line 4 of buckling is not limited to the line forming apparatus 2 of buckling.
Line forming apparatus 2 of buckling possesses presses punching in two sides of shape of the one side equipped with V word section 6a of cuboid First 6.Two sides pressing punches 6 are configured to the length direction of the corner 6b of V word section 6a laterally 1c, 1d.In addition, V word section 6a Corner 6b be configured to so as to the state for being connected to the substantially central portion of side 1c, 1d clamps square steel tube from side 1c, 1d side 1。
The corner 6b of the V word section 6a of two side pressing punches 6 is set to be connected to the side of square steel tube 1 along its length respectively The substantially central portion of 1c, 1d.
In the state of punch 6 is pressed by two sides and has clamped the square steel tube 1, two side pressing punches 6 are applied Make the power in their directions close to each other, the center of side 1c, 1d of square steel tube 1 is deformed in a manner of recessed inwardly, from And form line 4 of buckling along its length.
The length for line 4 of buckling suitably is adjusted corresponding to the size of square steel tube 1, so as in groove portion formation process described later In be equipped with the part of line 4 of buckling and easily buckle inwardly.
Also, the deflection (depth) for line 4 of buckling is more deep better in the not broken scope of side 1c, 1d.
Moreover, after line 4 is buckled in formation, two side pressing punches 6 are made to be left from side 1c, 1d of square steel tube 1.
(groove portion formation process)
As shown in (c) of Fig. 1, groove portion formation process be by width of 1a when 1a is along this of square steel tube 1 by Another side 1b sides are depressed into form the process of the groove portion 5 of V shape.
Fig. 3 shows to realize an example of the specific groove portion forming apparatus 3 (flattening metal die) of groove portion formation process.
Groove portion forming apparatus 3 possesses two side maintaining parts 7 and groove portion forms punch 8.But the one of pressing square steel tube 1 Face 1a to form the device of groove portion 5 of V shape in square steel tube 1 that it's not limited to that.
Side maintaining part 7 is in cuboid, and is abutted with side 1c, 1d of square steel tube 1 to keep square steel tube 1.In addition, Fig. 3 In, a side overlapping with square steel tube 1 in two side maintaining parts 7 is shown with dotted line.
It is in identically with side pressing punch 6 in shape of the one side equipped with V word section 8a of cuboid that groove portion, which forms punch 8,. Moreover, groove portion forms punch 8 so that the corner 8b of V word section 8a is located on the predetermined Central Line M for forming a groove position of one side 1a Mode be configured at the top of one side 1a.
In the present embodiment, bending angle of the angle, θ of V word section 8a than L font square steel tubes 1A be (in the present embodiment For right angle (90 °)) it is slightly larger.In this way, the angle, θ of V word section 8a is set to more slightly larger than the bending angle of square steel tube 1, thus when connecing In the bending process got off during bending square steel tube 1, the bending angle of L font square steel tubes 1A becomes desirable value (in this implementation It is in mode right angle (90 °)).
Also, when forming V groove portions 5 in the corner 8b of V word section 8a, preferably assigned in a manner of making square steel tube 1 not broken Circular arc (R) is processed.
For groove portion forms the intrusion of punch 8, compression distance at this time is that one side 1a connects with another side 1b Degree.Thus, the fracture in each face of square steel tube 1 is prevented.
First, square steel tube 1 is configured between two side maintaining parts 7.
Moreover, the corner 8b of the V word section 8a of groove portion formation punch 8 is set to be connected to Central Line M.
Next, forming 8 applying power of punch to groove portion, formed a groove to enter the predetermined of square steel tube 1 to another side 1b side pressures Position.
Compression distance at this time is the degree that one side 1a connects with another side 1b.
Thus, as shown in figure 3, the one side 1a of square steel tube 1 is crushed and deforms, so as to form the groove portion 5 of V-shape.
Moreover, after forming a groove 5, groove portion is formed punch 8 and left from the one side 1a of square steel tube 1.
In addition, in the present embodiment, the manufacture L font square steel tube 1A that substantially at right angles to bending square steel tube 1 forms, but It's not limited to that.The angle in the L portions of L font square steel tubes 1A can be adjusted, can also correspond to the angle ground adjustment tank of the L words Portion forms the angle of the corner 8b of punch 8.
(bending process)
As shown in (d) of Fig. 1, bending process be so that one side 1a across the both sides (side of the part formed with groove portion 5 1aa and opposite side 1ab) mode bending square steel tube 1 close to each other process.
Fig. 4 shows to realize an example of the specific apparatus for bending (folded bent metal die) 15 of bending process.But It is that the device of bending square steel tube 1 is not limited to the device.
Apparatus for bending 15 possesses two panels pressing plate 9, upper mould piece 10, lower module 11, bending module 12 and crooked formed punch 13.
Pressing plate 9 is the board member of side 1c, 1d for pressing square steel tube 1.Pressing plate 9 is equipped with two panels, between each other the side of sandwiching Steel pipe 1 simultaneously presses side 1c, 1d, and is kept in a manner of square steel tube 1 is not moved.A pressure shown in broken lines in Fig. 4 Plate 9.
Upper mould piece 10 is in the width roughly the same with square steel tube 1, and be configured to the one side 1a of square steel tube 1 across equipped with The side 1aa of the part of groove portion 5 is pressed.
Lower module 11 is in the width roughly the same with square steel tube 1, and is configured at the opposite of upper mould piece 10 across square steel tube 1 Side (side to connect with the another side 1b of square steel tube 1).
It is in the width roughly the same with square steel tube 1 to bend module 12, and can be with rotation axis 14 relative to lower module 11 Central rotation.
In the state of (a) of Fig. 4 before bending square steel tube 1, bend module 12 and lower module 11 is linearly arranged side by side.
In the state of (b) of Fig. 4 after manufacturing L font square steel tubes 1A, during bending module 12 as being with rotation axis 14 The heart and relative to lower module 11 substantially at right angles to inclined state.
Crooked formed punch 13 is in cuboid, and is linked with driving and reversing mechanism (not shown).(a) of Fig. 4 before bending square steel tube 1 In the state of, the one side vertical with advance and retreat direction is abutted with bending module 12.
If crooked formed punch 13 is moved by driving and reversing mechanism (not shown) to 1 side of square steel tube, bending die part is boosted upwards 12。
So, bending module 12 is rotated centered on rotation axis 14.
By the rotation, the another side of the opposite side 1ab across groove portion 5 of square steel tube 1 is boosted upwards.
Thus, the opposite side 1ab rotations of square steel tube 1, the one side 1a sides of opposite side 1ab are abutted with the side of upper mould piece 10. Also, the face parallel to advance and retreat direction of crooked formed punch 13 is abutted with bending module 12.
In addition, by adjusting the upper pushing volume of crooked formed punch 13, it can carry out the bending part A's of the L words of L font square steel tubes 1A The adjustment of angle of bend.Such as the state of (b) of Fig. 4 is the state boosted upwards to greatest extent, L font square steel tubes 1A is bent 90°。
Fig. 5 is the groove portion formation process by the manufacture method of present embodiment and formed with the side in the state of groove portion 5 The photo of steel pipe 1.Fig. 6 is and the L font square steel tubes 1A after bending by the bending process of the manufacture method of present embodiment The photo of bending part A.
In this way, for for the L font square steel tubes 1A that produces, not cutting the four of square steel tube 1 by present embodiment A side can just be formed.
Therefore, intensity decreases are not produced, the part being laminated additionally by bending is hardened, thereby while welding, also carries High intensity.
Also, the cut-out of side, welding need not be carried out, so as to manufacture the L font square steel of high intensity at low cost Pipe 1A.
In addition, need higher it is rigid in the case of, can also using solder joints, binding agent come engage bending section or Person is to the two sides of infolding.
In the bending method of the square steel tube 1 of present embodiment, also a square steel tube 1 is implemented as shown in (a) of Fig. 7 Bending twice, thus, it is possible to low cost and stably manufacture has the square steel tube 1B of two bending part B.
Also, as Fig. 7 (b) shown in, by implementing bending three times to a square steel tube 1, can low cost and stably The square steel tube 1C of quadrangle of the manufacture with four bending part C.
Therefore, according to the present embodiment, babinet, the surfacing of pallet of the household electrical appliances of high intensity can be provided at low cost Deng the house associated member such as frame of household electrical appliances component or integral bathroom rack.
Also, by using the L for possessing above-mentioned buckle line forming apparatus 2, groove portion forming apparatus 3 and apparatus for bending 15 The manufacture device 100 of font square tube, can in high precision, it is smooth and stably carry out square steel tube 1 bending.
But the present invention is not limited to the bending by above-mentioned apparatus for bending progress, above device can not also be used (metal die) is formed.
The explanation of symbol
1-square steel tube, 1A-L font square steel tubes, 1a-one side, 1b-another side, 1c-side, 1d-side, 2-pressure Curve forming apparatus, 3-groove portion forming apparatus, 4-line of buckling, 5-groove portion, 6-side pressing punch, 7-side maintaining part, 8-groove portion formation punch, 15-apparatus for bending, 100-manufacture device, A-bending part, M-make a reservation for form a groove in position Entreat line.

Claims (6)

  1. A kind of 1. manufacture method of L fonts square tube, it is characterised in that including：
    Groove portion formation process, in the process, by being pressed into width while along this of square tube positioned at above-mentioned Another surface side of dorsal part simultaneously forms a groove；And
    Bending process, in the process, by make above-mentioned one side in a manner of the both sides of above-mentioned groove portion are close to each other to above-mentioned Square tube carries out bending.
  2. 2. the manufacture method of L fonts square tube according to claim 1, it is characterised in that
    In above-mentioned groove portion formation process, the corner of the V word section by pushing the pressing component with V word section in above-mentioned one side To form above-mentioned groove portion.
  3. 3. the manufacture method of L fonts square tube according to claim 2, it is characterised in that
    The angle in the above-mentioned corner of above-mentioned V word section is corresponding with the bending angle of above-mentioned square tube.
  4. 4. according to the manufacture method of the L font square tubes described in any one of claims 1 to 3, it is characterised in that
    Include line formation process of buckling before above-mentioned groove portion formation process,
    In above-mentioned line formation process of buckling, two sides between above-mentioned one side and above-mentioned another side to above-mentioned square tube are along upper The length direction for stating side is inwards pressed to form line of buckling.
  5. A kind of 5. manufacture device of L fonts square tube, it is characterised in that including：
    Groove portion forming apparatus, it is by being pressed into width while along this of square tube positioned at above-mentioned dorsal part simultaneously Another surface side form a groove；And
    Apparatus for bending, it is to make being rolled in a manner of the both sides of above-mentioned groove portion are close to each other to above-mentioned square tube for above-mentioned one side It is curved.
  6. A kind of 6. L fonts square tube, it is characterised in that
    Square tube is bent over across the groove portion of the width setting along its one side.
CN201680052469.7A 2015-07-13 2016-07-08 The manufacture method of L font square tubes, the manufacture device of L font square tubes and L font square tubes Pending CN108025342A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2015139858A JP6416049B2 (en) 2015-07-13 2015-07-13 L-shaped square tube manufacturing method, L-shaped square tube manufacturing apparatus, and L-shaped square tube
JP2015-139858 2015-07-13
PCT/JP2016/070294 WO2017010427A1 (en) 2015-07-13 2016-07-08 Method for manufacturing l-shaped square pipe, device for manufacturing l-shaped square pipe, and l-shaped square pipe

Publications (1)

Publication Number Publication Date
CN108025342A true CN108025342A (en) 2018-05-11

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US (1) US20190001388A1 (en)
EP (1) EP3323521A4 (en)
JP (1) JP6416049B2 (en)
CN (1) CN108025342A (en)
AU (1) AU2016292581A1 (en)
MY (1) MY190827A (en)
TW (1) TWI683709B (en)
WO (1) WO2017010427A1 (en)

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CN111702420A (en) * 2020-06-28 2020-09-25 刘龙英 Metal steel pipe machining system and metal steel pipe machining process

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