CN107008816A - A kind of diameter reducing working method and its used necking die and application - Google Patents
A kind of diameter reducing working method and its used necking die and application Download PDFInfo
- Publication number
- CN107008816A CN107008816A CN201710359644.3A CN201710359644A CN107008816A CN 107008816 A CN107008816 A CN 107008816A CN 201710359644 A CN201710359644 A CN 201710359644A CN 107008816 A CN107008816 A CN 107008816A
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- China
- Prior art keywords
- necking
- working method
- diameter reducing
- reducing working
- tubing
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Classifications
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- 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
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/04—Reducing; Closing
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/18—Lubricating, e.g. lubricating tool and workpiece simultaneously
-
- 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
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
- B21D51/40—Making outlet openings, e.g. bung holes
Abstract
The invention discloses a kind of diameter reducing working method and its used necking die and application, diameter reducing working method is to first pass through fixture to fix tubing, tubing and heating pipe end are rotated by fixture again, pipe end is heated to close to or up after plastic deformation, necking die front contact is to after pipe end, pipe end is rearwardly moved from necking die front portion, and necking die carries out extrusion forming to pipe end.Pressure vessel is made by diameter reducing working method in tubing.The necking die is that transverse part, arc sections, supporting part and longitudinal direction portion are provided with matrix, and arc sections are provided between transverse part and longitudinal direction portion, is transverse part between supporting part and arc sections.The present invention has processing method simple and quick, can process necking end of different shapes, necking end uniformity is good, and necking end is thickened axially outward or necking end is thickened axially inwards, processing method and necking die energy industrial applications.
Description
Technical field
The invention belongs to necking processing technique field, especially a kind of diameter reducing working method and its used necking die
And application.
Background technology
Pressure vessel of the prior art, generally uses throat processing method or welding manner manufacture, and such as steel cylinder goes out
Firearm bottle.
Such as Chinese patent CN200510093660.X, use temperature arrising caused by friction and carry out necking, some can only be processed softer
The tubing of material, such as aluminum pipe, rely on temperature arrising caused by friction to cause long processing time, necking end oxidation is tight for the tubing of harder material
Weight, such as processing steel pipe, necking end because fraction time length and oxidation cause the small weak spot of the tensile strength of whole necking end, necking
End is easily broken off；Therefore above-mentioned diameter reducing working method has long processing time, necking end is easily broken off, can with reference to Figure of description
Know, necking end is without substantially thickening, and the necking that can only rub processes a kind of necking end of shape.
And for example Chinese patent CN01126577.9, uses squeezing shaping mode and carries out necking, it is adaptable to modulus of elasticity
Greatly and compared with the tubing of softwood matter, equally it is only applicable to process the less demanding necking of necking end tensile strength, for harder material
There can be the small weak spot of a whole circle tensile strength at the tubing of matter, squeezing shaping, it is impossible to which 20-150MPa pressure appearance is born in processing
The tubing of device, the necking end uniformity that shaping comes out is poor, and necking end is thickened axially outward.
Chinese patent CN200710185660.1 is the method that the necking generally used at present fabricates pressure vessel, is led to
Cross after both-end spinning necking machine-shaping, quenched and be tempered insulation, long processing time, necking end is thickened axially outward.
Chinese patent CN201210389715.1 necking method is continuous to leading by the cavity plate contracting block of two separate types
Pipe carries out radial impact, and two halves cavity plate contracting block makes conduit produce plastic deformation by each Secondary Shocks, and conduit is constantly sent into mould
Enter, two halves cavity plate contracting block then bump conduit, until completing whole necking processing；Technical merit to workman requires high, leans on
Experience holds necking process, and the pressure vessel uniformity produced is poor, and necking end is thickened axially outward.
Existing gas blast device（Fracturing device CN201611099345.2, CN201520283079.3,
CN201510489513.8、CN201510556527.7）All parts are generally carried out using machining or solder flux or butt welding mode
Connection, no matter manufactured using which kind of mode, explosion head can have weak spot with explosion pipe jointing part, cause gas
, there is the situation for flying head in body blaster explosion head and the first fracturing of explosion pipe jointing part in explosion.If solved using device is only flown
Fly head problem, only fly device manufacturing price itself and be just up to dozens of yuan, it will influence the use cost of gas blast device indirectly.
Existing gas blast device（Fracturing device）Also have that component parts is more, processing and the complicated technical problem of packaging technology,
There is also can not be solved the problem of winged head simultaneously.Blasting cartridge and explosion can be influenceed if mode disclosed in CN200710185660.1
Head length, directly affects the cost of blasting cartridge and explosion head, existing gas expansion device（Fracturing device）Hereinafter referred to as expansion is filled
Put as：CN201611099345.2, CN201520283079.3, CN201510489513.8, CN201510556527.7 are connected
Portion generally uses engagement thread（Screw thread needs machining）Or welding manner or butt welding mode are attached, no matter using it is above-mentioned which kind of
Mode is manufactured, pneumatic head, let out can head and tubing connecting portion can have weak spot, cause expansion gear when expanding
, there is the situation for flying head in connecting portion elder generation fracturing.
Existing expansion gear（Fracturing device）Also have that building block is more, each component processing and the complicated technology of packaging technology
Problem.
Such as the patent document that notification number is CN205858345U, " plug, tubing, activator, topping up hole and locking are disclosed
Activator installing port is provided with valve, plug, topping up hole is provided with plug or tubing ", though saved not than other expansion gears
Few part and number of assembling steps, however it remains tubing two needs to process twice, that is, one needs welding when assembling, and other end needs
Thread seal is connected, or two is connected using welding manner, is welded and is required high, connecting portion to the technological level for welding master worker
One whole lap welding picks out thickness always with seamless situation less than 20%, and connecting portion will be unable to make with the presence of any one weak spot
With threaded connection then needs to carry out screw thread process at tubing two, is not processed by the tubing both ends of screw thread process than
Pipe shaft it is weak so that there is a whole circle weak spot in plug, because connecting portion has stress weak spot, and adopt with tubing connecting portion
Use plug（Fill head）During threaded connection, plug（Fill head or let out energy head）Diameter is slightly less than tubing body diameter, causes plug
Stress surface is big, and volume is big, weight weight, the expansion gear first fracturing of connecting portion and the situation for occurring flying head in expansion.Topping up hole adds
Work needs processing radial hole and axial hole, and radial direction bore ends need to process coning, and it is straight that axial hole need to be processed into four sections of differences
The shoulder hole of footpath size, while radial hole and axial hole need to link together, it is necessary to Precision Machining, requirement on machining accuracy is high,
Processed complex, is unfavorable for industrialized production；Plug need individually processing activated device permanent opening, locking-valve and fairlead, it is necessary to
Repeatedly processed using different lathes, all parts of expansion gear need machining to cause whole production to take time and effort；Together
When outer pipe wall be provided with detonating fuse, and tubing two ends be provided with internal thread, it is necessary to using thicker steel pipe manufacture, manufacturing cost increase.
Because expansion gear has the possibility for flying head in expansion process in the prior art, therefore existing expansion gear is placed on
Only fly device, it is necessary to be placed in inflation port in the inflation port being drilled or fill filler deep enough, due to only flying device during expansion
Or the effect of filler, solve to fly head phenomenon（Pneumatic head or let out can head fly out inflation port）, realize safe working.It is description as follows
Only fly the document of device, CN201510487194.7, CN201620646686.6, Baidu's library document：
https://wenku.baidu.com/view/8b629284fab069dc5022018f.html。
However using only fly device also not 100% effectively, fly head situation still can occur, expansion-head once flies out,
Danger is brought to workmen and surrounding biologic；The increase of use cost can be also caused using only winged device, it will usually increase simultaneously
The use cost of dozens of yuan.
The content of the invention
Have processing technology simple it is an object of the invention to provide one kind, process velocity is fast, and necking end is thickened axially outward
Or a kind of diameter reducing working method for thickening axially inwards of necking end and its used necking die and application.
For achieving the above object, the technical solution adopted in the present invention is：A kind of diameter reducing working method, its feature
It is：First pass through fixture and fix tubing, then tubing and heating pipe end are rotated by fixture, pipe end is heated to approach
Or reach after plastic deformation, after necking die front contact to pipe end, pipe end is rearwardly moved from necking die front portion
Dynamic, necking die carries out extrusion forming to pipe end.
It is preferred that, through hole constant aperture is carried out to pipe end with through hole knife after extrusion forming.
It is preferred that, necking extrusion forming is carried out to one end of tubing by above-mentioned diameter reducing working method, one end of tubing is entered
Row sealing shaping.
It is further preferred that necking die carries out compression and thickening shaping to pipe end.
It is preferred that, necking compression and thickening shaping is carried out to one end of tubing by above-mentioned diameter reducing working method, to the one of tubing
End carries out sealing and thickens shaping.
It is further preferred that the necking die is provided with lubricant.
Most preferably, the lubricant is at least one of carbon dust, talcum powder, coal dust or graphite powder, or carbon dust, talcum
At least one of powder, coal dust, graphite powder compound lard.
The effect of carbon dust, talcum powder, coal dust, and/or graphite powder and high-temperature grease is lubrication and prevents tubing and reducing die
Tool is adhered, or tubing produces chemical reaction with lubricant, reduces coefficient of friction, increases die life.Necking die and pipe
Material stiction is bigger, and power consumption is bigger, and die life is shorter, therefore graphite powder or high temperature are coated with necking die
Grease can increase necking die service life, reduce power consumption.
A kind of pressure vessel for applying above-mentioned diameter reducing working method to be made, it is characterised in that：The tubing is passed through into necking
Pressure vessel is made in processing method.
It is preferred that, the pressure vessel is steel cylinder.
The purpose of rotation is pipe end is uniformly extruded the effect for reaching uniform thickened and realizing forging.Pipe end adds
Heat is easy for necking die to pipe end progress necking processing to close to or up plastic deformation.Necking die is according to tubing
A kind of necking processing mold that end needs the shape that is processed into and designed.
It is further preferred that the diameter reducing working method also includes continuing to rotate tubing after through hole, screw tap is towards pipe end through hole side
To motion tapping, screw tap does not rotate, and screw tap follows tubing rotary speed automatic telescopic to adjust, after the completion of tapping, reversely rotates pipe
Material, dorsad screw tap is exited in the motion of pipe end through hole direction to screw tap.
It is further preferred that the diameter reducing working method also includes continuing to rotate tubing after through hole, screw tap is towards pipe end through hole side
To motion tapping, screw tap do not rotate, and the tooth on screw tap is less than 1/2nd, after the completion of tapping, and screw tap is to anodontia direction advance tooth
Thick spacing, dorsad screw tap is exited in the motion of pipe end through hole to screw tap.
Screw tap is to reduce screw tap integral diameter for the purpose of more than half anodontia, and screw tap is between anodontia direction advance tooth thickness
Away from, make screw tap separate screw thread backed off after random screw tap.
It is further preferred that the diameter reducing working method is heated by sensing heater or burning torch or welding gun to pipe end.
When carrying out necking processing using 40Cr steel pipes, steel tube end part is heated to 600-980 DEG C of temperature.
It is preferred that, the necking die be on matrix be provided with transverse part, arc sections, supporting part and longitudinal direction portion, transverse part and
Arc sections are provided between longitudinal portion, is transverse part between supporting part and arc sections, adjusts the r angles of arc sections and the R angles of transverse part
Can be to pipe end necking machine-shaping, the length of necking die is more than or equal to the diameter of 2.5 times of pipe ends, the width of transverse part
It is pipe end diameter more than 1/3rd to spend L.
It is preferred that, the r angles of the arc sections rearwardly diminish from necking die front portion, and necking is processed into necking end axially inwards
Thicken.
It is further preferred that the r angles of the arc sections are from the anterior rearwardly ladder of necking die or linearly diminish, contracting is processed into necking
Mouthful end uniform thickened axially inwards.
It is preferred that, the r angles of the arc sections are constant, and necking is processed into necking end and thickened axially outward.
The R angles of the bigger transverse part of pipe diameter are bigger, and width L is longer.Or the R angles of the bigger transverse part of pipe diameter are constant,
The length of necking die is longer.
It is preferred that, the necking die is made of tool steel.
It is further preferred that the tool steel is tungsten steel or stainless steel or roll stell.
The r angles of arc sections influence the outer wall shape of pipe end and thickened, the R angles of transverse part and width L influence tubing end
The amount of swelling in portion；The r angles of arc sections influence the amount of swelling of tubing bottle ends in a small amount from anterior rearwardly become of necking die.L length
Degree is longer, and pipe end thickens thicker.
Linear velocity of the present invention refers to that the bigger rotating speed of pipe diameter is slower.
The linear velocity of tubing is adjusted according to the diameter, thickness and point end heating temperatures of tubing.
Pipe end of the present invention only needs to can be heated within 1-3 seconds close to or up plastic deformation, contracting using sensing heating
The end of mouth mold tool, which is rearwardly moved, can complete compression and thickening shaping for 2-5 seconds, substantially reduce processing duration, mould is consistent
And using full-automatic processing, it is not necessary to human intervention, the good product consistency that necking is processed, as needed adjustment is justified
The r angles of arc portion and the L length of transverse part, just can process pipe end of different shapes, realize that necking end is thickened axially outward
Or necking end is thickened axially inwards.
The present invention has processing method simple and quick, can process necking end of different shapes, necking end uniformity is good, contracts
Mouth end is thickened axially outward or necking end is thickened axially inwards, processing method and necking die energy industrial applications.
Brief description of the drawings
Fig. 1 is the stereogram of necking die 1 that necking end of the present invention is thickened axially inwards；
Fig. 2 is the stereogram of necking die 2 that necking end closure of the present invention is thickened axially inwards；
Fig. 3 is the stereogram of necking die 3 that necking end of the present invention is thickened axially outward；
Fig. 4 is the stereogram of necking die 4 that necking end closure of the present invention is thickened axially outward；
Fig. 5 is the present invention using the tubing 1 after necking die 3 and the necking of necking die 4 processing；
Fig. 6 is the present invention using the tubing 2 after the necking of necking die 3 processing；
Fig. 7 is the present invention using the tubing after necking die 1 and the necking of necking die 4 processing；
Fig. 8 is the present invention using the tubing after the necking of necking die 1 processing；
Annex 1 carries out the pipe end cutting effect after necking processing using necking die 1 for the present invention；Annex 2 is the present invention
Effect after pipe end tapping after necking processing is carried out using necking die 1；Annex 3 is entered for the present invention using necking die 1
The non-tapping effect of pipe end after row necking processing；Annex 4 is necking die 1 of the present invention photo in kind；Annex 5 is the present invention
Pipe end both sides cutting effect after necking processing is carried out using necking die 1；Annex 1 uses necking die 1 for the present invention
Rubescent pipe end effect has just been withdrawn after carrying out necking processing；In figure：22 be transverse part, and 23 be arc sections, and 24 be support
Portion, 25 be longitudinal direction portion, and 26 be matrix；R is arc sections R angles, and R is transverse part R angles；L is transverse part length；Arrow represents reducing die
The direction of motion of tool.
Embodiment
With reference to accompanying drawing 1-3 of the present invention, technical scheme is clearly and completely described；Obviously, it is described
Embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, this area
The every other embodiment that those of ordinary skill is obtained under the premise of creative work is not made, belongs to protection of the present invention
Scope.
Embodiment 1
A kind of diameter reducing working method, the fixture for first passing through numerically controlled lathe fixes tubing, then rotates tubing and heating by fixture
Pipe end, pipe end is heated to, close to or up after plastic deformation, after necking die front contact to pipe end, to manage
Material end is rearwardly moved from necking die front portion, and necking die carries out extrusion forming to pipe end.Pass through sensing heater
Or burning torch or welding gun are heated to pipe end.
Embodiment 2
Through hole constant aperture is carried out to pipe end with through hole knife after diameter reducing working method as described in Example 1, extrusion forming；
Through hole knife is located on necking die.
Embodiment 3
Diameter reducing working method as described in embodiment 1 or 2, carries out necking to one end of tubing by above-mentioned diameter reducing working method and squeezes
It is molded, sealing shaping is carried out to one end of tubing, pressure vessel, such as steel cylinder, fire extinguisher bottle is made.
Embodiment 4
Diameter reducing working method as described in embodiment 1 or 2, necking die carries out compression and thickening shaping, system to tubing two ends end
Into the expansion tube of gas expander.
Embodiment 5
Diameter reducing working method as described in embodiment 1 or 2, carries out necking to one end of tubing by above-mentioned diameter reducing working method and squeezes
Pressure thickens shaping, and one end progress sealing to tubing thickens shaping, and the expansion tube of gas expander is made.In the necking die
Upper smearing or injection lubricant.The lubricant is at least one of carbon dust, talcum powder, coal dust or graphite powder；Or carbon dust, cunning
At least one of stone flour, coal dust, graphite powder compound lard.
Embodiment 6
Diameter reducing working method as described in embodiment 1 or 2, the diameter reducing working method also includes continuing to rotate tubing after through hole,
Screw tap moves tapping towards pipe end through hole direction, and screw tap does not rotate, and screw tap follows tubing rotary speed automatic telescopic to adjust, and attacks
After the completion of silk, tubing is reversely rotated, dorsad screw tap is exited in the motion of pipe end through hole direction to screw tap；Screw tap is located at necking die
On.
Embodiment 7
Diameter reducing working method as described in embodiment 1 or 2, the diameter reducing working method also includes continuing to rotate tubing after through hole,
Screw tap moves tapping towards pipe end through hole direction, and screw tap does not rotate, and the tooth on screw tap is less than 1/2nd, after the completion of tapping,
Screw tap is to the thick spacing of anodontia direction advance tooth, and dorsad screw tap is exited in the motion of pipe end through hole to screw tap.Screw tap is more than half nothing
The purpose of tooth is to reduce screw tap integral diameter, and screw tap makes screw tap separate screw thread and retreat wire vent to the thick spacing of anodontia direction advance tooth
Cone；Screw tap is located on necking die.
When carrying out necking processing using 40Cr steel pipes, steel tube end part is heated to 600-980 DEG C of temperature, passes through sensing heater
Being heated only needs 1-3 seconds.
Embodiment 8
Diameter reducing working method described in above-described embodiment 1-7, the necking die is that transverse part 22, arc sections are provided with matrix
23rd, supporting part 24 and longitudinal direction portion 25, are provided with arc sections 23 between transverse part 22 and longitudinal direction portion 25, supporting part 24 and arc sections 23 it
Between be transverse part 22, the r angles and the R angles of transverse part 22 for adjusting arc sections 23 can be to pipe end necking machine-shapings, reducing die
The length of tool is more than or equal to the diameter of 2.5 times of pipe ends, and the width L of transverse part is pipe end diameter more than 1/3rd.
Embodiment 9
Necking die as described in Example 8, the r angles of the arc sections rearwardly diminish from necking die front portion, necking processing
Thickened axially inwards into necking end.The r angles of the arc sections are from the anterior rearwardly ladder of necking die or linearly diminish, and necking adds
Work is into necking end uniform thickened axially inwards.Through hole knife and screw tap are located on necking die.
Embodiment 10
Necking die as described in Example 8, the r angles of the arc sections are constant, and necking is processed into necking end and thickened axially outward.
Embodiment 11
Necking die as described in embodiment 8 or 9 or 10, the R angles of the bigger transverse part of pipe diameter are bigger, and width L is longer.Or pipe
The R angles of the bigger transverse part of material diameter are constant, and the length of necking die is longer.The necking die is made of tool steel.It is described
Tool steel is tungsten steel or stainless steel or roll stell.The r angles of arc sections influence the outer wall shape of pipe end and thickened, transverse part
R angles and width L influence the amount of swelling of pipe end；The r angles of arc sections rearwardly become a small amount of influence tubing from necking die is anterior
The amount of swelling of bottle end.L length is longer, and pipe end thickens thicker.Linear velocity of the present invention refers to that pipe diameter is got over
Big rotating speed is slower.
The linear velocity of tubing is adjusted according to the diameter, thickness and point end heating temperatures of tubing.
40Cr pipe ends of the present invention only need to can be heated to for 1-3 seconds using sensing heating to be become close to or up plasticity
Shape, the end of necking die, which is rearwardly moved, can complete compression and thickening shaping for 2-5 seconds, substantially reduce processing duration, mould
Tool is consistent and uses full-automatic processing, it is not necessary to human intervention, the good product consistency that necking is processed, as needed
Adjust arc sections r angles and transverse part L length, just can process pipe end of different shapes, realize necking end axially to
Thicken outside or necking end is thickened axially inwards.
Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention,
Although the present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic,
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in the present invention's
Within protection domain.
Claims (15)
1. a kind of diameter reducing working method, it is characterized in that：First pass through fixture and fix tubing, then tubing and heating are rotated by fixture
Pipe end, pipe end is heated to, close to or up after plastic deformation, after necking die front contact to pipe end, to manage
Material end is rearwardly moved from necking die front portion, and necking die carries out extrusion forming to pipe end.
2. diameter reducing working method according to claim 1, it is characterized in that：It is additionally included in after extrusion forming with through hole knife to pipe
Material end carries out through hole constant aperture.
3. diameter reducing working method according to claim 1, it is characterized in that：By above-mentioned diameter reducing working method to the one of tubing
End carries out necking extrusion forming, and sealing shaping is carried out to one end of tubing.
4. diameter reducing working method according to claim 1, it is characterized in that：The necking die is extruded pipe end
Thicken shaping.
5. diameter reducing working method according to claim 1, it is characterized in that：By above-mentioned diameter reducing working method to the one of tubing
End carries out necking compression and thickening shaping, and one end progress sealing to tubing thickens shaping.
6. diameter reducing working method according to claim 1, it is characterized in that：The necking die is provided with lubricant.
7. diameter reducing working method according to claim 6, it is characterized in that：The lubricant be carbon dust, talcum powder, coal dust or
At least one of graphite powder；Or at least one of carbon dust, talcum powder, coal dust, graphite powder and grease mixing.
8. diameter reducing working method according to claim 1, it is characterized in that：Also include continuing to rotate tubing, screw tap after through hole
Tapping is moved towards pipe end through hole direction, screw tap does not rotate, screw tap follows tubing rotary speed automatic telescopic to adjust, tapping is complete
Cheng Hou, reversely rotates tubing, dorsad screw tap is exited in the motion of pipe end through hole direction to screw tap.
9. diameter reducing working method according to claim 1, it is characterized in that：Also include continuing to rotate tubing, screw tap after through hole
Tapping is moved towards pipe end through hole direction, screw tap does not rotate, the tooth on screw tap is less than 1/2nd, after the completion of tapping, screw tap
To the thick spacing of anodontia direction advance tooth, dorsad screw tap is exited in the motion of pipe end through hole to screw tap.
10. diameter reducing working method according to claim 1, it is characterized in that：The diameter reducing working method passes through sensing heating
Device or burning torch or welding gun are heated to pipe end.
11. a kind of pressure vessel for applying the diameter reducing working method as described in claim any one of 1-10 to be made, it is characterised in that：
Pressure vessel is made by diameter reducing working method in tubing.
12. the necking die used in a kind of diameter reducing working method according to claim 1, it is characterized in that：The contracting
Mouth mold tool is that transverse part, arc sections, supporting part and longitudinal direction portion are provided with matrix, and circular arc is provided between transverse part and longitudinal direction portion
Portion, is transverse part between supporting part and arc sections, and adjusting the r angles of arc sections and the R angles of transverse part can add to pipe end necking
Work is molded, and the length of necking die is more than or equal to the diameter of 2.5 times of pipe ends, and the width L of transverse part is pipe end diameter
More than 1/3rd.
13. diameter reducing working method according to claim 12, it is characterized in that：The r angles of the arc sections are before necking die
Portion rearwardly diminishes, and necking is processed into necking end and thickened axially inwards.
14. diameter reducing working method according to claim 12, it is characterized in that：The r angles of the arc sections are before necking die
Portion rearwardly ladder or linearly diminishes, and necking end uniform thickened axially inwards is processed into necking.
15. diameter reducing working method according to claim 12, it is characterized in that：The r angles of the arc sections are constant, necking processing
Thickened axially outward into necking end.
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| CN201710359644.3A CN107008816A (en) | 2017-05-20 | 2017-05-20 | A kind of diameter reducing working method and its used necking die and application |
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| CN201710359644.3A CN107008816A (en) | 2017-05-20 | 2017-05-20 | A kind of diameter reducing working method and its used necking die and application |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106955941A (en) * | 2017-05-20 | 2017-07-18 | 郭远军 | A kind of diameter reducing working method and its used necking die and application |
| CN109663864A (en) * | 2018-12-21 | 2019-04-23 | 冯光芬 | A kind of ductule tip machine particular manufacturing craft |
| CN110116171A (en) * | 2019-05-29 | 2019-08-13 | 远军热能动力科技有限公司 | Necking processing mold and its processing method in a kind of workpiece |
| CN110116173A (en) * | 2019-05-29 | 2019-08-13 | 远军热能动力科技有限公司 | Necking lathe for machining and its processing method in a kind of workpiece |
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| CN106955941A (en) * | 2017-05-20 | 2017-07-18 | 郭远军 | A kind of diameter reducing working method and its used necking die and application |
| CN109663864A (en) * | 2018-12-21 | 2019-04-23 | 冯光芬 | A kind of ductule tip machine particular manufacturing craft |
| CN109663864B (en) * | 2018-12-21 | 2021-01-12 | 冯光芬 | Special die for small catheter tip machine |
| CN110116171A (en) * | 2019-05-29 | 2019-08-13 | 远军热能动力科技有限公司 | Necking processing mold and its processing method in a kind of workpiece |
| CN110116173A (en) * | 2019-05-29 | 2019-08-13 | 远军热能动力科技有限公司 | Necking lathe for machining and its processing method in a kind of workpiece |
| CN110242797A (en) * | 2019-05-29 | 2019-09-17 | 远军热能动力科技有限公司 | A kind of metal Pipe joining method and its connector |
| CN110242797B (en) * | 2019-05-29 | 2021-05-18 | 远军热能动力科技有限公司 | Connector for metal pipe connection |
| CN110116171B (en) * | 2019-05-29 | 2024-03-29 | 远军热能动力科技有限公司 | Workpiece inner shrinkage processing die and processing method thereof |
| CN110116173B (en) * | 2019-05-29 | 2024-03-29 | 远军热能动力科技有限公司 | Workpiece inner shrinkage processing lathe and processing method thereof |
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