CN109070166A - Drawing mandrel - Google Patents
Drawing mandrel Download PDFInfo
- Publication number
- CN109070166A CN109070166A CN201780018876.0A CN201780018876A CN109070166A CN 109070166 A CN109070166 A CN 109070166A CN 201780018876 A CN201780018876 A CN 201780018876A CN 109070166 A CN109070166 A CN 109070166A
- Authority
- CN
- China
- Prior art keywords
- contact portion
- pipe
- drawing plug
- main part
- rake
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by means other than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, rods or tubes
- B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by means other than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, rods or tubes specially adapted for making tubular articles
- B21C1/24—Metal drawing by machines or apparatus in which the drawing action is effected by means other than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, rods or tubes specially adapted for making tubular articles by means of mandrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels for metal drawing
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels for metal drawing
- B21C3/16—Mandrels; Mounting or adjusting same
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
Abstract
A drawing plug according to an embodiment of the present invention is disposed between a drawing die and a tube, the drawing plug is inserted inside an inner surface of the tube, and the tube is processed. The drawing plug according to the invention comprises: a large diameter portion formed to have a first outer diameter; a contact portion contacting one side surface of the large diameter portion and including an inclined portion having one side contacting the large diameter portion and formed to have a first outer diameter and having an outer diameter decreasing toward the other side of the inclined portion; an insertion portion inserted into both the large diameter portion and the contact portion to connect the large diameter portion and the contact portion, wherein the inclined portion has a stepped portion stepped in an insertion direction, and at least a portion of the inclined portion is made of a diamond sintered body.
Description
Technical field
This disclosure relates to a kind of drawing plug (drawing plug).More specifically, this disclosure relates to one kind can reduce institute
The drawing plug of the roughness of the defect and improvement pipe of the pipe of processing.
Background technique
The method for being commonly used for cold manufacture stainless steel tube may include cold pilger mill rolling, cold drawing or cold pilger mill rolling
With the combination of subsequent cold drawing.
In stainless steel tube manufacture, with cold drawing or cold drawing or the combination of cold pilger mill rolling and subsequent cold drawing
Process number increase, dimensional accuracy and roughness are improved.
However, the surface roughness that can be realized in cold forming in maximum RA (area reduction) % of material has limit
System.In order to improve surface roughness, it may be desirable to increase cold forming process number.However, this leads to the increase of manufacturing cost.
Therefore, it is necessary to a kind of forming techniques significantly to improve the roughness in the cold forming process using existing method.
Summary of the invention
Technical purpose
The disclosure is designed to solve the above problem.
Compared to the Hubbing method for using existing mold, the disclosure is intended to by using diamond in drawing stainless steel tube
Plug improves inside surface roughness.The purpose of the disclosure is through the diamond coated material on the mandrel structure that tradition uses
Expect to improve the inside surface roughness in cold drawing forming.
Technical solution
In one aspect of the present disclosure, it provides a kind of for processing the drawing plug of pipe, wherein when pipe is arranged on drawing
When between mold and the drawing plug, the drawing plug is introduced in pipe to process pipe, wherein the drawing plug packet
Include: main part has first external diameter；Contact portion extends, wherein the contact portion includes from the main body from the main part
The rake that portion extends, wherein as the rake extends outwardly away from the main part, the outer diameter of the rake is from described the
One outer diameter gradually decreases to second external diameter；And interior interconnecting piece, the interior interconnecting piece are inserted into the main part and described simultaneously
In contact portion, the main part and the contact portion are connected to each other,
Wherein, the rake has stage portion, and the stage portion is formed on the rake and along the plug
Incoming direction into pipe extends, wherein at least part of the rake is made of sintered diamond.
In an embodiment of drawing plug, the part including the stage portion of the contact portion is by sintering Buddha's warrior attendant
It is made of stones at.
In an embodiment of drawing plug, the stage portion about with the central axial line of the contact portion to be overlapped
Perpendicular have symmetrical angled manner closed curve extend.
In an embodiment of drawing plug, the stage portion about with the central axial line of the contact portion to be overlapped
Perpendicular symmetrically spiral-shaped extension.
In an embodiment of drawing plug, the spiral-shaped beginning and end is on one wire.
In an embodiment of drawing plug, the contact portion further include: the first non-inclined portion has first external diameter
And there is constant outer diameter；And the second non-inclined portion, with the second external diameter for being less than the first external diameter and there is perseverance
Fixed outer diameter.
In an embodiment of drawing plug, the rake is located at first non-inclined portion and described second non-
Between rake.
In an embodiment of drawing plug, at least one of the main part and the contact portion are burnt by polycrystalline
Knot diamond is made.
In an embodiment of drawing plug, the main part has box thread in first, female spiral shell in described first
Line, which is located at, to be limited on the slot in the main part, wherein and the contact portion includes box thread and head accommodation space in second,
Box thread is located across on the hole that the contact portion limits in described second, and the head accommodation space is limited to the contact portion
In, and there is the internal diameter of the internal diameter greater than the hole,
Wherein, the interior interconnecting piece includes: head, is contained in the accommodation space of head；And outer male thread, be located at along
The length direction of the interior interconnecting piece is limited in the elongated hole in the interior interconnecting piece, wherein the outer male thread simultaneously with
Box thread engages in box thread and described second in described first, and the main part and the contact portion are connected to each other.
In an embodiment of drawing plug, it is contained in exposure and the institute on the head in the accommodation space of head
The free end face for stating contact portion is coplanar.
In an embodiment of drawing plug, the first fluid passage is limited in the main part, and second
Fluid passage is limited in the interior interconnecting piece, wherein when the interior interconnecting piece is inserted into the main part, described
One fluid passage is in fluid communication with each other with second fluid passage.
In an embodiment of drawing plug, the arithmetic for the inner surface of the pipe processed contacted with the contact portion
Mean roughness is 0.1 μm or smaller of Ra.
The effect of the disclosure
According to the disclosure, due to generated when processing pipe pressure and thermal shock caused by pipe inner surface surface it is thick
Rugosity can be enhanced.
In addition, the disclosure can ensure that the durability of the contact portion contacted with pipe, so that it is guaranteed that the processing efficiency of pipe and durable
Property.
In addition, the disclosure can increase the smoothness of the inner surface of pipe, so as to which defect is greatly decreased.
In addition, the disclosure can inhibit the vacuum pressure that may in addition generate in pipe during pipe processing, to prevent
Personal injury simultaneously ensures the durability of machine to reduce replacement/maintenance cost.
Detailed description of the invention
Fig. 1 is the drawing process for showing the pipe using drawing mould and according to the drawing plug of one embodiment of the disclosure
Partial cutaway perspective view.
Fig. 2 is the perspective schematic view according to the drawing plug of one embodiment of the disclosure.
Fig. 3 is the side view according to the drawing plug of one embodiment of the disclosure.
Fig. 4 is the partial sectional view for showing the drawing plug according to one embodiment of the disclosure.
Fig. 5 is the sectional view according to the drawing plug of one embodiment of the disclosure.
Fig. 6 is the perspective schematic view of drawing plug according to another embodiment of the present disclosure.
Fig. 7 is the side view of drawing plug according to another embodiment of the present disclosure.
Fig. 8 and Fig. 9 is the drawing plug processing pipe shown using drawing mould and according to another embodiment of the present disclosure
Sectional view.
Preferred forms
When drawing plug 10 is connected to pull rod 4, the movement of drawing plug 10 is prevented by pull rod 4.Therefore, when positioned at drawing
When pipe P between plug 10 and drawing mould D is moved, drawing plug 10 is not moved with pipe P.
Drawing mould D includes the rake 2 of the outer surface for receiving tube.Rake 2 includes that internal diameter is being processed greater than pipe
(R2 is shown in figure to the receiving section (R1 is shown in Fig. 9) of outer diameter before, internal diameter the first contact-segment identical with the outer diameter of pipe before processing
9) and internal diameter is less than the second contact-segment for managing outer diameter before processing (R3 is shown in Fig. 9).
Specific embodiment
Show and describe further below the example of each embodiment.It will be appreciated that description here is not intended to weigh
Benefit requires to be limited to described specific embodiment.On the contrary, it is intended to may include in the disclosure as defined by the appended claims
Spirit and scope in substitute, modification object and equivalent.
For brief and clear explanation, the element in attached drawing is not necessarily to scale.Identical reference in different attached drawings
Label indicates the same or similar element, and thus executes similar function.
Fig. 1 is the drawing process for showing the pipe using drawing mould and according to the drawing plug of one embodiment of the disclosure
Partial cutaway perspective view.
Referring to Fig.1, it is placed between drawing mould D and pipe P according to the drawing plug 10 of one embodiment of the disclosure.Core
Stick 10 can be implemented as being inserted into the floating type drawing plug in pipe and for processing pipe P.
Pipe P can be the workpiece being made of stainless steel.Guan Yu drawing mould D and (the especially drawing core of drawing plug 10
The inclined contact portion 14 of stick 10) contact while move.Therefore, the cross section of pipe reduces.That is, as pipe P passes through drawing die
Has the space between D and drawing plug 10, the outer diameter and thickness of pipe reduce.Therefore, pipe can be drawn into desired final
Size.
In view of this, the movement of plug 10 is limited by pull rod 4 when drawing plug 10 is connected to pull rod 4.Therefore, work as position
When pipe P between drawing plug 10 and drawing mould D is moved, plug 10 is not moved with pipe P.
Drawing mould D includes the rake 2 of the outer surface for receiving tube.Rake 2 includes that internal diameter is being processed greater than pipe
(R2 is shown in figure to the receiving section (R1 is shown in Fig. 9) of outer diameter before, internal diameter the first contact-segment identical with the outer diameter of pipe before processing
9) and internal diameter is less than the second contact-segment for managing outer diameter before processing (R3 is shown in Fig. 9).
In addition, drawing mould D includes the non-inclined portion 3 for extending and having constant internal diameter from rake 2.Non-inclined portion 3
Internal diameter size be equal to the pipe with final size as desired by the user outer diameter size.
In one embodiment, the roughness of pipe is determined by the intensity and shape of the component contacted with drawing plug 10.Root
According to the disclosure, the drawing plug 10 that can be significantly improved the roughness of pipe P and reduce its defect is provided.
In one embodiment, when identical area reduction (RA) percentage is applied to the disclosure and using cermet
It include sintered gold in the use according to the disclosure compared with comparing case when the case of drawing plug or hard metal drawing plug
It is coarse after the drawing of the pipe of the thickness of outer diameter and 1.0mm with 12.7mm in the cold drawing molding of the drawing plug of hard rock
Degree has improved roughness.
When using cermet drawing plug, the arithmetic average roughness Ra of the pipe after processing is 0.2 μm to 0.35 μm.
When the identical area of application reduces (RA) %, the arithmetic average using the pipe of the drawing plug processing containing sintered diamond is thick
Rugosity Ra is 0.06 to 0.08 μm.
Therefore, the disclosure can be applied to the various fields for requiring pipe to have high inside surface roughness quality, such as cleaning pipe,
The heat-transfer pipe of steam generator, for cage walls of nuclear fuel etc..
Referring to Fig. 2 to Fig. 6, the drawing plug 10 according to one embodiment of the disclosure is shown.Fig. 2 is according to the disclosure
One embodiment drawing plug perspective schematic view.Fig. 3 is the drawing plug according to one embodiment of the disclosure
Side view.Fig. 4 is the partial sectional view for showing the drawing plug according to one embodiment of the disclosure.Fig. 5 is according to the disclosure
One embodiment drawing plug sectional view.Fig. 6 is the schematic of drawing plug according to another embodiment of the present disclosure
Perspective view.
It include main part 12, contact portion 14 and interior interconnecting piece 16 according to the drawing plug 10 of one embodiment of the disclosure.
Main part 12 is with cylindrical shape and has first external diameter.Main part 12 can be by being sintered Buddha's warrior attendant from including polycrystalline
The material selected in the group of stone, hard metal, steel, carbon steel, special steel, cast iron, non-ferrous metal and combinations thereof is made.
In view of this, the free end of main part 12 can have restriction wherein for receiving at least part of of pull rod 4
Pull rod receiving opening 125.
Contact portion 14 extends in main part 12.Contact portion 14 have the first external diameter portion 144 that is contacted with main part 12 with
And extend and have the rake 140 for the outer diameter being gradually reduced from first external diameter portion.
In addition, contact portion 14 may include extend from main part 12 and with first external diameter and definite length extended it is first non-
Rake 144 extends from the first non-inclined portion 144 and has the rake 140 of outer diameter being gradually reduced and from rake
140 extend and have the second non-inclined portion 146 of the second external diameter and definite length extended less than first external diameter.
That is, the first non-inclined portion 144 and the second non-inclined portion 146 are respectively provided with constant first external diameter and second external diameter.
Rake 140 between the first non-inclined portion 144 and the second non-inclined portion 146 and have be reduced to outside second from first external diameter
The outer diameter of diameter.In fig. 3 it is shown that first external diameter S1 and second external diameter S2, by the size of first external diameter and second external diameter
Size is compared.
In view of this, the length of rake 140 can be determined by the difference between first external diameter and second external diameter.Particularly, incline
The gradient and length of inclined portion 140 can change according to the difference between first external diameter and second external diameter, so that rake 140 is outer
Diameter tapers to second external diameter from first external diameter.
The truncated cone shape that rake 140 can have outer diameter to be alongst gradually reduced.Add by drawing mould
When work pipe P, rake 140 can contact the inner surface of pipe P and limit the size of the internal diameter of pipe P.
In other words, the appearance face contact drawing mould D of pipe P, while the inner surface of pipe P contacts drawing plug 10.This
Under state, as pipe is along the spatial movement limited between drawing mould D and drawing plug 10, pipe P can be processed to
The corresponding shape in the space limited between drawing mould D and drawing plug 10.In view of this, the ruler of adjustable drawing plug 10
The very little pipe P with acquisition with final size as desired by the user.
In addition, having stage portion 145 according to the contact portion 14 of the present embodiment, stage portion 145 is located at minimum outer diameter position
And between the second non-inclined portion 146 and rake 140.Outer diameter and inclination of the stage portion 145 in the second non-inclined portion 146
Apparent difference is generated between the outer diameter in portion 140.
Contact portion 14 in the present embodiment can be by from including polycrystalline sintered diamond, hard metal, steel, carbon steel, special steel, casting
The material selected in the group of iron, non-ferrous metal and combinations thereof is made.Particularly, rake 140 can be by polycrystalline sintered diamond system
At.Alternatively, the part including stage portion 145 of rake is preferably made of sintered diamond.
This extends the service life for receiving the edge surface of rake 140 of the big contact load from pipe P.This can also prevent
The abrasion of rake 140 caused by only the inside of pipe P is due to rake 140 contacts repeatedly with pipe P and be damaged.
In addition, this construction improves the machinabilitys of rake 140, therefore extends the service life of mold and slow down
The replacing construction of drawing plug 10.In addition, when replacing drawing plug 10, if necessary, this allows only more changing-over
One of contact portion 14, main part 12 and interior interconnecting piece 16.Therefore, material cost can be reduced.
In addition, due to the high machinability of rake 140, contacts when with high-intensitive rake 140 with pipe P
When, the pipe P of uniform quality can be continuously applied, while improve the inside surface roughness of pipe P.
In another embodiment, as the main part 12, contact portion 14 and interior interconnecting piece of all parts of drawing plug 10
16 and rake 140 can be made of polycrystalline sintered diamond.Alternatively, the portion other than rake 140 of drawing plug 10
Part can be made of hard metal or cermet material.
Referring to Fig. 4, drawing plug 10 includes interior interconnecting piece 16.Interior interconnecting piece 16 is inserted into main part 12 and contact portion simultaneously
In 14 and connect main part 12 and contact portion 14.
Main part 12 has box thread 121 in first be formed locally.Contact portion 14 includes entire essentially through it
Box thread 141 and head accommodation space 143 defined therein in most the second of length, head accommodation space 143 have
There is the internal diameter for being greater than the internal diameter of box thread 141 in second.
In first box thread 121 can limit from the end contacted with contact portion 14 of main part 12 towards main part 12 from
The slot extended by end.At least part of the outer male thread 163 of interior interconnecting piece 16, which can be plugged into, limits box thread 121 in first
In slot.
In addition, box thread 141 can limit the length extended from the end of contact portion 14 contacted with main part 12 in second
Opening.The development length of opening is smaller than the whole length of contact portion 14.
Head accommodation space 143 and the open communication for limiting box thread 141 in second.The internal diameter of head accommodation space 143
The internal diameter of box thread 141 in greater than second.The head 161 of interior interconnecting piece 16 is placed in head accommodation space 143.That is, head
The combination restriction of accommodation space 143 and the opening limited by box thread 141 in second penetrates the thin of contact portion 14 along its length
Long hole.
Interior interconnecting piece 16 includes the head 161 being contained in head accommodation space 143 and outer male thread 163.Outer male thread
163 extend from head and are fastened in first in box thread 121 and second box thread 141 simultaneously to connect main part 12 and contact
Portion 14.
In other words, the outer male thread 163 of interior interconnecting piece 16 is fastened to box thread 121 and contact portion in the first of main part 12
Box thread 141 in the second of 14.It can be realized and be fastened by the method for bolt/nut.
In addition, the head 161 of interior interconnecting piece 16 is contained in the head accommodation space 143 of contact portion 14.The top on head 161
Surface can be exposed to outside.In view of this, the top surface of the exposure on head 161 can be coplanar with the free end face of contact portion 14.That is,
Head 161 can be hidden in contact portion 14.
In addition, interior interconnecting piece 16, which has, is defined in the second fluid passage 165 therein.Second fluid passage 165 can
It is embodied as alongst penetrating the hole of interior interconnecting piece 16.
Main part 12, which has, is defined in the first fluid passage 123 therein.First fluid passage 123 it is implementable for from
Hole of the box thread 121 towards the free end through-body portion 12 of main part 12 in the first of main part 12.
In view of this, when main part 12 and contact portion 14 are connected to each other by interior interconnecting piece 16, main part 12 first in
Second fluid passage 165 of fluid channel 123 and interior interconnecting piece 16 can limited hole (H is shown in Fig. 9).Through-hole (H is shown in Fig. 9) from
One end of drawing plug 10 extends to the other end.
The broken of drawing plug 10 is prevented by the through-hole H that the first fluid passage 123 and the second fluid passage 165 limit
Damage, the breakage otherwise may be by causing during the drawing process of pipe P in the vacuum pressure that the inside of pipe P generates.
Particularly, when pulling pipe P with drawing pipe P, vacuum pressure is generated in the inside of pipe P.In view of this, when in vacuum
When the end of the pipe P of drawing under pressure is separated with drawing plug 10 and drawing mould D, vacuum pressure moment is eliminated.Therefore, drawing
Mold D or drawing plug 10 are impacted and/the breakage that is damaged caused by being eliminated due to this moment.
However, fluid can be free by the through-hole H limited by the first fluid passage 123 and the second fluid passage 165
Ground movement.Therefore, difference is not generated between the interior pressure of pipe P and the external pressure of pipe P.It is therefore possible to prevent drawing mould D or drawing
The damage or breakage of plug 10.
As previously shown, in the drawing plug according to the present embodiment, the part including stage portion 145 of contact portion 14 can be by
Sintered diamond is made.Referring to Fig. 5, the part including stage portion 145 of rake 140a can be made and be had by sintered diamond
There is annular shape.
The inner surface of pipe contacted with contact portion 14 by by stage portion 145 presence generation edge and be polished and because
This can have improved roughness.That is, it is broken metal can be generated because of high pressure and heat when the inner surface of pipe contacts contact portion 14
Bits, or uneven section or due to folded section caused by pushing caused by may occur in which due to contact fault.However, in this public affairs
In opening, such metal fragment can be removed by stage portion 145, or uneven section or folded section can be polished by stage portion 145, from
And improve roughness.
When rake 140a is made of sintered diamond, the stage portion 145 of load concentration is strong during drawing process
Degree is reinforced.This can increase the service life of drawing plug itself and improve the roughness of the pipe as workpiece.
Referring to Fig. 6, drawing plug according to another embodiment is shown.Fig. 6 is according to another embodiment of the present disclosure
The perspective schematic view of drawing plug.Fig. 7 is the side view of drawing plug according to another embodiment of the present disclosure.
Referring to figure 6 and figure 7, other than stage portion 245, drawing plug 20 and root according to another embodiment of the present disclosure
According to the construction having the same of drawing plug 10 referring to figs. 1 to the embodiment shown in Fig. 5.Hereinafter, in addition to stage portion 245 with
The description of outer component will be omitted.
Stage portion 245 is introduced in the direction X in drawing plug 20 along pipe P with spiral-shaped extension.That is, stage portion
245 on the outer surface of contact portion 24 and along the outer surface of contact portion 24 with spiral-shaped extension.
Particularly, stage portion 245 is from the top edge of contact portion 24 for being located at the truncated cone shape with predetermined inclination
Starting point extend.Then, stage portion 245 extends downwardly in curved manner along the outer surface of contact portion 24.Then, stage portion
245 extend with being bent upwards before the feather edge for reaching contact portion 24.Then, stage portion 245 returns to the top of contact portion 24
Starting point on edge.Therefore, stage portion 245 is with spiral shape.
That is, contact portion 24 is inclined from an edge with first external diameter to another edge with second external diameter
There is the outer diameter being gradually reduced simultaneously.The presence of the stage portion 245 extended along the outer surface of contact portion 24 can produce contact portion
The region that the outer diameter in region and contact portion 24 that 24 outer diameter reduces suddenly increases suddenly.
Therefore, the inner surface of pipe contacted with contact portion 14 by due to stage portion 145 presence generation edge and by
Polish and therefore can have improved roughness.That is, can be generated because of high temperature and heat when the inner surface of pipe contacts contact portion 14
Metal fragment, or uneven section or due to folded section caused by pushing caused by may occur in which due to contact fault.However,
In the disclosure, such metal fragment can be removed by stage portion 145, or uneven section or folded section can be by stage portions 145
Polishing, so as to improve roughness.
According to the drawing plug 20 of the present embodiment, compared with above-mentioned drawing plug, stage portion 245 is with spiral shell
Shape is revolved to extend.Therefore, while the polishing effect of stage portion 245 can be maintained, it can prevent pipe from rapidly being processed.Cause
This, the surface roughness of final products can be further improved.
Referring to Fig. 8 and Fig. 9, the process that pipe P is processed using the drawing plug 20 of the disclosure is shown.Fig. 8 and Fig. 9 is to show
The sectional view of drawing plug processing pipe using drawing mould and according to another embodiment of the present disclosure.
For purposes of illustration only, although showing the drawing of the drawing plug of the embodiment shown in figure 6 and figure 7 using basis
Technique, but the explanation is equally applicable to using the drawing process according to the drawing plugs of other embodiments.
Firstly, the pipe P before processing can be placed on the rake 2 of drawing mould.Specifically, the outer surface of pipe P connects
Contact that the contact-segment R2 of rake 2, contact-segment R2 have outer diameter identical with the outer diameter of pipe P before processing.
Then, after drawing plug 20 is inserted into pipe P, pipe P be placed on drawing plug 20 and drawing mould D it
Between.
Then, in the case where drawing plug 20 is fixed to drawing mould D, pipe P is inserted in 20 He of drawing plug
In the space limited between drawing mould D.In view of this, one end of drawing plug 20 is connected to pull rod 4 and not with being drawn
Pipe P move together.
In view of this, the outer surface of pipe P is moved along the contact-segment R3 of drawing mould D, and the inner surface of pipe P contacts drawing
The contact portion 24 of plug 20.
The gradient of the contact-segment R3 of drawing mould D is equal to the gradient of the rake 240 of drawing plug 20.Pipe P's is outer
Surface is contacted with the contact-segment R3 of drawing mould D, and its inner surface is contacted with the rake 240 of drawing plug 20.Therefore, pipe P
Thickness keep constant.
Added that is, the interval between the contact-segment R3 of drawing mould D and the rake 240 of drawing plug 20 corresponds to
The thickness of the pipe P of work.
Then, it is drawn with pipe along the contact-segment R3 of drawing mould D and the rake 240 of drawing plug 20, pipe P's
Internal diameter is gradually reduced.
In view of this, the presence for the stage portion 245 being formed on rake 240 improves the inner surface of pipe P in which can dramatically
Roughness.
After pipe is drawn along the contact-segment R3 of drawing mould D and the rake 240 of drawing plug 20, pipe P along
The non-inclined portion 3 of drawing mould D and the second non-inclined portion 246 of drawing plug 20 pass through.At this point, the internal diameter of pipe P becomes constant.
That is, the size of the internal diameter of pipe P is by the non-inclined portion 3 of drawing mould D and the second non-inclined portion 246 of drawing plug 10
It determines.
In addition, the pressure inside pipe P becomes vacuum as pipe P is moved along drawing mould D and drawing plug 20.However,
The through-hole (that is, combination of the first fluid passage 123 and the second fluid passage 165) limited along the length of drawing plug 10
(see Fig. 6) can be communicating together by the interior or exterior space of plug 10.Therefore, fluid motion passes through the interior pressure and pipe that through-hole H makes pipe P
The external pressure holding of P is equal to each other.
As described above, respectively illustrating in accordance with an embodiment of the present disclosure.However, in spirit and scope of the present disclosure, it is real
It applies example and can combine in various ways, modification or change.
It will be appreciated by those skilled in the art that in the case where not departing from the spirit or essential characteristics of the disclosure, this public affairs
Open can by it is other it is specific in the form of implement.It is to be understood, therefore, that embodiments described above is all explanation in all respects
Property rather than be restrictive.The scope of the present invention is defined by the claims rather than is limited by above specific embodiment.
Whole variations or modification and its equivalent in the spirit and scope of the claims should be interpreted as including in model of the invention
In enclosing.
Claims (10)
1. a kind of for processing the drawing plug of pipe, wherein when pipe is arranged between drawing mould and the drawing plug,
The drawing plug is introduced in the pipe to process the pipe, wherein the drawing plug includes:
Main part has first external diameter；
Contact portion extends from the main part, wherein the contact portion includes the rake extended from the main part, wherein
As the rake extends outwardly away from the main part, the outer diameter of the rake gradually decreases to second from the first external diameter
Outer diameter；And
Interior interconnecting piece, while being inserted into the main part and the contact portion, by the main part and the contact portion that
This connection,
Wherein, the rake has stage portion, and the stage portion is formed on the rake and along the drawing plug
Extend to the incoming direction in the pipe,
Wherein, at least part of the rake is made of sintered diamond.
2. drawing plug according to claim 1, wherein the part including the stage portion of the contact portion is by being sintered
Diamond is made.
3. drawing plug according to claim 1, wherein the stage portion is about the central axial line with the contact portion
There is the perpendicular of coincidence symmetrical spiral-shaped closed curve to extend.
4. drawing plug according to claim 1, wherein the contact portion further include:
First non-inclined portion with first external diameter and has constant outer diameter；And
Second non-inclined portion with the second external diameter for being less than the first external diameter and has constant outer diameter.
5. drawing plug according to claim 4, wherein the rake is located at first non-inclined portion and described
Between two non-inclined portions.
6. drawing plug according to claim 1, wherein at least one of the main part and the contact portion are by more
Brilliant sintered diamond is made.
7. drawing plug according to claim 1, wherein the main part, which has to be located at, to be limited in the main part
On slot first in box thread,
Wherein, the contact portion includes:
Box thread in second is located across on the hole that the contact portion limits；And
Head accommodation space is limited in the contact portion and has the internal diameter of the internal diameter greater than the hole,
Wherein, the interior interconnecting piece includes:
Head is contained in the head accommodation space；And
Outer male thread is limited in the elongated hole in the interior interconnecting piece positioned at the length direction along the interior interconnecting piece,
In, the outer male thread is engaged with box thread in box thread in described first and described second simultaneously, by the main part and
The contact portion is connected to each other.
8. drawing plug according to claim 7, wherein be contained in the sudden and violent of the head in the head accommodation space
Show up coplanar with the free end face of the contact portion.
9. drawing plug according to claim 8, wherein the first fluid passage is limited in the main part, and
Second fluid passage is limited in the interior interconnecting piece,
Wherein, when the interior interconnecting piece is inserted into the main part, stream in first fluid passage and described second
Body channel is in fluid communication with each other.
10. drawing plug according to claim 1, wherein the inner surface of the pipe processed contacted with the contact portion
Arithmetic average roughness be 0.1 μm or smaller of Ra.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160012354A KR101859936B1 (en) | 2016-02-01 | 2016-02-01 | Drawing plug |
| KR10-2016-0012354 | 2016-02-01 | ||
| PCT/KR2017/000635 WO2017135598A2 (en) | 2016-02-01 | 2017-01-19 | Drawing plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109070166A true CN109070166A (en) | 2018-12-21 |
| CN109070166B CN109070166B (en) | 2020-06-26 |
Family
ID=59500751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780018876.0A Expired - Fee Related CN109070166B (en) | 2016-02-01 | 2017-01-19 | drawing mandrel |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR101859936B1 (en) |
| CN (1) | CN109070166B (en) |
| WO (1) | WO2017135598A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2808490C1 (en) * | 2023-02-20 | 2023-11-28 | Публичное акционерное общество "Трубная металлургическая компания" (ПАО "ТМК") | Mandrel for cold working of pipes |
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| SU121430A1 (en) * | 1958-08-26 | 1958-11-30 | В.Я. Шапиро | Self-aligning mandrel for pipe drawing |
| US3903724A (en) * | 1973-09-17 | 1975-09-09 | Leonid Pavlovich Alekhin | Floating mandrel for drawing welded tubes with longitudinal seam |
| JPS511541U (en) * | 1974-06-24 | 1976-01-08 | ||
| CN85203642U (en) * | 1985-08-23 | 1986-12-31 | 上海第一铜管厂 | Motility core-head of single head and tail cone for disk drawing pipe |
| JPH11221612A (en) * | 1998-02-04 | 1999-08-17 | Katsuma Kokan Kk | Method for working profile slit on tubing and device for working profile groove |
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| BRPI0601746A (en) * | 2006-04-04 | 2007-12-11 | Ambro Milao Tecnologia Ltda | preconfigured endostatic system for pipe forming chucks |
| CN201376007Y (en) * | 2009-03-18 | 2010-01-06 | 宝山钢铁股份有限公司 | Cold-drawing mold for refining crystalline grains on internal surface of steel pipe |
| CN201579288U (en) * | 2009-12-05 | 2010-09-15 | 衡阳华菱钢管有限公司 | Compound inner die of cold-drawing steel tubes |
| KR101354655B1 (en) * | 2012-11-09 | 2014-01-21 | 박정우 | Drawing plugs for polycrystalline diamond and manufacturing method thereof |
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| JP2811431B2 (en) * | 1996-02-26 | 1998-10-15 | 宮崎精鋼株式会社 | Plug for drawing pipe material and method for drawing pipe material using the plug |
| JPH10113714A (en) * | 1996-10-11 | 1998-05-06 | Fuji Dies Kk | Caulking method plug |
| JP2001179327A (en) * | 1999-12-17 | 2001-07-03 | Sumitomo Metal Ind Ltd | Rifle tube drawing plug |
| JP2003112218A (en) * | 2001-09-28 | 2003-04-15 | Usui Internatl Ind Co Ltd | Method for manufacturing thick-wall thin-diameter tube |
-
2016
- 2016-02-01 KR KR1020160012354A patent/KR101859936B1/en not_active Expired - Fee Related
-
2017
- 2017-01-19 CN CN201780018876.0A patent/CN109070166B/en not_active Expired - Fee Related
- 2017-01-19 WO PCT/KR2017/000635 patent/WO2017135598A2/en not_active Ceased
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU121430A1 (en) * | 1958-08-26 | 1958-11-30 | В.Я. Шапиро | Self-aligning mandrel for pipe drawing |
| US3903724A (en) * | 1973-09-17 | 1975-09-09 | Leonid Pavlovich Alekhin | Floating mandrel for drawing welded tubes with longitudinal seam |
| JPS511541U (en) * | 1974-06-24 | 1976-01-08 | ||
| CN85203642U (en) * | 1985-08-23 | 1986-12-31 | 上海第一铜管厂 | Motility core-head of single head and tail cone for disk drawing pipe |
| JPH11221612A (en) * | 1998-02-04 | 1999-08-17 | Katsuma Kokan Kk | Method for working profile slit on tubing and device for working profile groove |
| CN1744956A (en) * | 2003-04-11 | 2006-03-08 | 杰富意钢铁株式会社 | Manufacturing method and manufacturing apparatus of high dimensional precision tube |
| BRPI0601746A (en) * | 2006-04-04 | 2007-12-11 | Ambro Milao Tecnologia Ltda | preconfigured endostatic system for pipe forming chucks |
| CN201376007Y (en) * | 2009-03-18 | 2010-01-06 | 宝山钢铁股份有限公司 | Cold-drawing mold for refining crystalline grains on internal surface of steel pipe |
| CN201579288U (en) * | 2009-12-05 | 2010-09-15 | 衡阳华菱钢管有限公司 | Compound inner die of cold-drawing steel tubes |
| KR101354655B1 (en) * | 2012-11-09 | 2014-01-21 | 박정우 | Drawing plugs for polycrystalline diamond and manufacturing method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2808490C1 (en) * | 2023-02-20 | 2023-11-28 | Публичное акционерное общество "Трубная металлургическая компания" (ПАО "ТМК") | Mandrel for cold working of pipes |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20170091394A (en) | 2017-08-09 |
| WO2017135598A2 (en) | 2017-08-10 |
| KR101859936B1 (en) | 2018-05-21 |
| CN109070166B (en) | 2020-06-26 |
| WO2017135598A3 (en) | 2018-08-02 |
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