CN103108707A - Method for manufacturing pipe - Google Patents
Method for manufacturing pipe Download PDFInfo
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- CN103108707A CN103108707A CN2011800414139A CN201180041413A CN103108707A CN 103108707 A CN103108707 A CN 103108707A CN 2011800414139 A CN2011800414139 A CN 2011800414139A CN 201180041413 A CN201180041413 A CN 201180041413A CN 103108707 A CN103108707 A CN 103108707A
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- Prior art keywords
- mould
- hole
- drift
- cylindrical body
- bottom tube
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/03—Making uncoated products by both direct and backward extrusion
- B21C23/035—Making products of generally elongated shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
- B21C23/085—Making tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/18—Making uncoated products by impact extrusion
- B21C23/186—Making uncoated products by impact extrusion by backward extrusion
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Extrusion Of Metal (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Metal Extraction Processes (AREA)
Abstract
This method for manufacturing pipe has: a first step for fabricating a first bottomed cylindrical body (12) by a first backward extrusion process that strikes a first punch (11) onto work from a first direction; a second step for fabricating a second bottomed cylindrical body (14) by carrying out a second backward extrusion process that strikes a second punch (13) onto the first bottomed cylindrical body (12) from the first direction with the inside surface of the first bottomed cylindrical body (12) as a guide; and a third step for fabricating a first cylindrical body (16) having a through hole (16a) by opening a hole in the bottom of the second bottomed cylindrical body (14).
Description
Technical field
The present invention relates to a kind of manufacturing technology of slender pipeline.
Background technology
In patent documentation 1, a kind of manufacture method of ducted body of the steel with following operation being disclosed: will be made into as the rod iron of processing object (workpiece) operation of bottom tube-like body by backward extrusion (backward extrusion) processing; Its bottom is carried out punching press and is made into the operation of bottomless cylindrical body; And insert pin and carry out extrusion process or push the operation that deep-draw is processed in the inside of this cylindrical body.
In patent documentation 2, a kind of manufacture method with hollow part of following operation being disclosed: processes by backward extrusion and will be made into as the raw material of workpiece the operation of bottom tube-like body; And will there be the bottom tube-like system to make the operation of cylindrical body by ironing (ironing) processing and punch process.
Then, in recent years, the thin-long of metal tube or the requirement of superfineization are strengthened, and prediction should require in the future and can further strengthen.
Patent documentation 1: Japanese kokai publication hei 9-122795 communique
Patent documentation 2: Japanese kokai publication hei 3-221235 communique
Summary of the invention
The problem that invention will solve
In the manufacture method of patent documentation 1,2 disclosed pipelines, by workpiece being carried out backward extrusion processing, making has a bottom tube-like body as intermediate.Yet the internal diameter (hereinafter referred to as " draw ratio ") of processing the degree of depth/hole in the hole that the bottom tube-like body is arranged that obtains by a backward extrusion has restriction.Therefore, in patent documentation 1,2 disclosed methods, even the draw ratio that also sometimes can't obtain expecting in the pipeline that finally produces.
The object of the present invention is to provide a kind of technology of making slender pipeline.
For the scheme of dealing with problems
The pipe-making method of a mode of the present invention comprises: the first operation, from first direction, workpiece is carried out the first backward extrusion processing, and making thus first has the bottom tube-like body, wherein, adds and squeezes into the first drift man-hour carrying out above-mentioned the first backward extrusion; The second operation, have the bottom tube-like body to carry out the second backward extrusion processing from above-mentioned first direction to above-mentioned first, making thus second has the bottom tube-like body, wherein, add man-hour carrying out above-mentioned the second backward extrusion, have under the inner surface guiding of bottom tube-like body above-mentioned first and squeeze into the second drift; And the 3rd operation, by in the above-mentioned second bottom opening that the bottom tube-like body arranged, make the first cylindrical body with through hole.
In addition, can further include the 4th operation, namely, process to make the second cylindrical body by the extruding ironing, wherein, add man-hour pushing ironing, insert the hole body of selling and described the first cylindrical body is pressed into the first mould in the described through hole of described the first cylindrical body.
In addition, above-mentioned the 4th operation can comprise: the 5th operation, above-mentioned pin is inserted into the above-mentioned through hole of above-mentioned the first cylindrical body and the above-mentioned hole body of above-mentioned the first mould, and make above-mentioned pin form the preposition relation with respect to above-mentioned the first mould; And the 6th operation, under the state of the above-mentioned position relationship that keeps above-mentioned the first mould and above-mentioned pin, above-mentioned the first cylindrical body is pressed into the above-mentioned hole body of above-mentioned the first mould.
In addition, can constitute: have the cone-shaped part near the insert port of the described hole body of described the first mould, when described the first mould and described pin were in described position relationship, the external diameter that described pin is in the part that surpasses described cone-shaped part position was in the external diameter of the part of the position corresponding with the described cone-shaped part of described hole body less than described pin.
In addition, can constitute: described the first mould has the cone-shaped part near the insert port of described hole body, surpasses the internal diameter of described cone-shaped part partly greater than the minimum diameter of described cone-shaped part.
in addition, can constitute: described the first mould has the cone-shaped part near the insert port of described hole body, in described the 4th operation, by described cone-shaped part, form external diameter greater than the marginal portion of other parts in an end of described the second cylindrical body, above-mentioned pipe-making method also comprises the 7th operation, in the 7th operation, by external diameter three drift identical with the hole body internal diameter of described the second mould, described the second cylindrical body is pressed into the hole body of the second mould from its other end, wherein, described the other end is not formed with described marginal portion, the internal diameter of described the second mould is identical with the hole body of described the first mould.
In addition, can constitute: in the 3rd operation, in the described second bottom opening that the bottom tube-like body arranged, wherein, the external diameter of described the 4th drift is less than the described second internal diameter that the bottom tube-like body arranged by the 4th drift.
Description of drawings
Figure 1A is the figure for each operation of the pipe-making method of explanation present embodiment.
Figure 1B is the figure for each operation of the pipe-making method of explanation present embodiment.
Fig. 2 is the figure for the detailed operation of explanation operation # 4.
Fig. 3 is the figure for explanation the first variation.
Fig. 4 is the figure for explanation the second variation.
Fig. 5 is the figure for explanation the 3rd variation.
Fig. 6 is the figure for explanation the 4th variation.
Fig. 7 is the figure for explanation the 5th variation.
Description of reference numerals
11: drift; 12: the bottom tube-like body is arranged; 12a, 12a ': non-through hole; 13: drift; 13a: columnar portion; 13b: columnar portion; 14: the bottom tube-like body is arranged; 14a: non-through hole; 15: drift; 16: cylindrical body; 16a: through hole; 17: pin; 18,18 ': mould; 18a, 18a ': hole body; 18b, 18b ': tapered portion; 19: cylindrical body; 19a: marginal portion; 20: drift; 22: mould; 22a: hole body; 24: drift.
The specific embodiment
The pipe-making method of an embodiment of the invention is described.
Figure 1A～Figure 1B is the figure for each operation of the pipe-making method of explanation present embodiment.This pipe-making method comprises this series of processes of #1～#5, uses the multi-stag model (former) (not shown) that the ground configuration of a plurality of processing department row shapes is obtained, and carries out continuously successively the processing of operation #1～#5.
With reference to Figure 1A, in operation #1, as the processing of backward extrusion for the first time, pass through internal diameter
The inner surface of tubular mould (not shown) limit the outside as the workpiece of processing object, the downside from figure to the direction (first direction) of upside to workpiece with external diameter
Columned drift 11 driving depth L11.By this operation #1, produced bottom tube-like body 12, this has bottom tube-like body 12 to have internal diameter to be
And the degree of depth is the non-through hole 12a of L11, and external diameter is
In operation # 2, as the processing of backward extrusion for the second time, pass through internal diameter
The inner surface of tubular mould (not shown) be limited in the outside that bottom tube-like body 12 is arranged that makes in operation #1, from the first direction identical with the drift 11 of operation #1, under the inner surface guiding of the non-through hole 12a that bottom tube-like body 12 is arranged, with drift 13 driving depth L22.By this operation # 2, be manufactured with bottom tube-like body 14, this has bottom tube-like body 14 to have the non-through hole 14a of degree of depth L22, and external diameter is
The degree of depth L22 of non-through hole 14a is the degree of depth that approaches the twice of the degree of depth L11 that carries out the operation # 2 non-through hole 12a that bottom tube-like body 12 is arranged before.The external diameter that bottom tube-like body 14 is arranged
Than carrying out the operation # 2 external diameter that bottom tube-like body 12 is arranged before
Slightly large.Usually, the draw ratio (degree of depth/internal diameter) of processing the non-through hole that obtains by a backward extrusion is 5～6 left and right, is 7 left and right to the maximum.In the present embodiment, carry out twice backward extrusion processing, the draw ratio about the twice of the draw ratio that therefore obtains once obtaining.For example, if obtain respectively twice backward extrusion processing of draw ratio 7, can access draw ratio 14 and be the non-through hole 12 of left and right.
The drift of squeezing into the other way around is difficult to realize high-precision heart yearn aligning, so need high-precision model.But in the present embodiment, squeeze into drift 11,13 from same direction in the backward extrusion processing of the backward extrusion processing of operation #1 and operation #2.Therefore, in the present embodiment, even do not use high-precision model, the drift 11 that also can make operation #1 and the drift 13 of operation # 2 realize that high-precision heart yearn aims at.Its result can be easy to make the even thickness that the bottom tube-like body is arranged with the darker non-through hole that obtains by twice backward extrusion processing with low-cost and high accuracy.If make the even thickness that the bottom tube-like body is arranged as intermediate, even as final products, also can easily obtain even thickness and elongated pipeline.
In addition, according to the figure (#2) of the central authorities of Figure 1A as can be known, drift 13 is to be by the external diameter that is in front
Columnar portion 13a and the external diameter that is in rear end side for less than
The secondary cylindrical shape that consists of of columnar portion 13b.Therefore, there is the non-through hole 14a of bottom tube-like body 14 also to become by internal diameter
Part and internal diameter
The secondary cylindrical shape that consists of of part.At this, the total depth that the non-through hole 14a of bottom tube-like body 14 is arranged is L22, and internal diameter wherein is
The degree of depth of part be L21.
Play the function of pilot punch 13 for the non-through hole 12a that makes bottom tube-like body 12, make the external diameter of columnar portion 13b of the rear end side of drift 13
Internal diameter with non-through hole 12a
Unanimously.But, even the external diameter of columnar portion 13b
Internal diameter than non-through hole 12a
Slightly little or slightly large, non-through hole 12a also can bring into play the function of pilot punch 13.
Then, the length of the columnar portion 13a of the front of drift 13 (L22-L21) is slightly shorter than the degree of depth L11 of the non-through hole 12a that bottom tube-like body 12 is arranged.Thus, before the front end of columnar portion 13a carries out butt with the bottom that the non-through hole 12a of bottom tube-like body 12 is arranged, there is the non-through hole 12a of bottom tube-like body 12 contact with drift 13 and begin to bring into play guiding function, helps drift 13 and have bottom tube-like body 12 to realize the vibration that heart yearn is aimed at and suppressed drift 13.
In operation # 3, as punching processing, with first party in the opposite direction namely the upside from figure on the direction (second direction) of downside, have the bottom of bottom tube-like body 14 to carry out punching press by 15 pairs of drifts, thereby produce the cylindrical body 16 with through hole 16a.The external diameter of drift 15
The internal diameter of thin part than the non-through hole 12a that bottom tube-like body 14 is arranged
Slightly little.Therefore, when punching press is carried out in the bottom that bottom tube-like body 14 is arranged, cause drift 13 to be aimed at the heart yearn of drift 15 even drift 15 and drift 13 are squeezed into the other way around and produce some errors, drift 15 also can not contact with the inner surface of non-through hole 14a, thereby can the grinding inwall.About the external diameter with drift 15
Be made as the external diameter than drift 13
Little of what degree, the mechanical precision that has according to model is suitably set and is got final product.
With reference to Figure 1B, in operation # 4, as the processing of extruding ironing, with external diameter
Pin 17 insert the through hole 16a of cylindrical body 16, by drift 20, cylindrical body 16 is pressed into the hole body 18a of mould 18.The external diameter of pin 17
Minimum diameter than cylindrical body 16
Slightly little.Produce the cylindrical body 19 of thin-long by operation # 4.
In the hole body 18a of mould 18, be formed with the tapered portion 18b of the cone-shaped that the distally narrows down near the insert port of being inserted by pin 17 and cylindrical body 16.The internal diameter of the part of the nearside of the tapered portion 18b of hole body 18a is
The internal diameter of the part that narrows down in the distally of tapered portion 18b is
Be pressed into the external diameter of the cylindrical body 16 of hole body 18a
Internal diameter less than the larger side of hole body 18a
And the internal diameter greater than a less side
Be pressed into the internal diameter in the distally of hole body 18a by tapered portion 18b
Thereby part make cylindrical body 16 thin-longs.
As the processing method that makes cylindrical body 16 thin-longs, also exist tension-thining to draw processing except the extruding ironing processing of using in the present embodiment.But, draw in tension-thining that in processing, cylindrical body 16 easily ruptures, so cylindrical body 16 is stood the restriction that degree that tension-thining draws is subject to thin-long.On the other hand, in the extruding ironing processing of adopting in the present embodiment, cylindrical body 16 can not rupture, and therefore draws processing with tension-thining and compares the thin-long that can carry out high length-diameter ratio.
In addition, there is step in the inner surface of the through hole 16a of the cylindrical body 16 of making in operation # 3, but processes by the extruding ironing of operation # 4, eliminates this step, and interatomic interval becomes closely, therefore can produce the uniform cylindrical body 19 of inner surface in the longitudinal direction.
In addition, as the detailed operation in operation # 4, at first, will sell at first the 17 through hole 16a that are inserted into cylindrical body 16, by drift 20, cylindrical body 16 will be pressed into afterwards the hole body 18a of mould 18.
Fig. 2 is the figure for the detailed operation of explanation operation #4.With reference to Fig. 2, in operation # 4a, at first, pin 17 is inserted into the hole body 18a of mould 18 by the through hole 16a of cylindrical body 16, make pin 17 be in the preposition relation with respect to mould 18.Then, in operation # 4b, under the state of the position relationship that keeps this mould 18 and pin 17, by drift 20, cylindrical body 16 is pressed into the hole body 18a of mould 18.
When cylindrical body 16 was pressed into the hole body 18a of mould 18, particularly through tapered portion 18b the time, temperature rose due to friction.But, in operation # 4a～#4b, the cylindrical body 16 that is pressed into hole body 18a with produce deviation with respect to the relative position relationship between the fixing pin 17 of hole body 18a, therefore can prevent that cylindrical body 16 from being baked out vestige by pin 17.In addition, in order to make the slip between pin 17 and cylindrical body 16 better, preferably pin 17 is implemented coating.
According to the figure (#4b) in the figure (#4) on Figure 1B right side or Fig. 2 left side as can be known, in operation # 4, by the tapered portion 18b of hole body 18a, produce external diameter in the end above in the figure of the cylindrical body 19 that is pressed into hole body 18a greater than the marginal portion 19a of other parts.This edge is unwanted part in the pipeline as final products.
In operation # 5, by drift 24, cylindrical body 19 is pressed in the hole body 22a of mould 22, wherein, the internal diameter of hole body 22a
Internal diameter with the hole body 18a of the mould 18 that uses in operation # 4
Identical, but do not have the part of cone-shaped, the external diameter of drift 24
Internal diameter with hole body 22a
Identical or compare internal diameter
Slightly little.The external diameter of the drift 24 that uses in operation # 5
Identical with the internal diameter of the hole body 22a of mould 22 or slightly less than the internal diameter of the hole body 22a of mould 22, therefore, when squeezing into drift 24, the front end of drift 24 can be inserted into the insert port of the hole body 22a of mould 22.Squeeze into drift 24, the insert port end of the front end that makes drift 24 and the hole body 22a of mould 22 is consistent, perhaps, the part of the front end of drift 24 is inserted into the insert port of the hole body 22a of mould 22, then, with marginal portion 19a excision, do not have marginate pipeline thereby complete.
As mentioned above, according to present embodiment, the hole that will form by front backward extrusion is carried out repeatedly backward extrusion processing as the guiding of the drift of backward extrusion next time from same direction, make draw ratio high the bottom tube-like body arranged, its bottom is carried out punching press and is made as cylindrical body, therefore aim to carry out repeatedly backward extrusion by high-precision heart yearn, thereby can make the pipeline of thin-long.For example can produce injection needle elongated pipeline like that.
(the first variation)
Fig. 3 is the figure for explanation the first variation.
In the first variation, be used in drift and the non-cylindrical shape of operation #1, but be the corner post shape.Therefore the non-through hole 12a ' that bottom tube-like body 12 ' is arranged that makes in operation #1 is polygonal as shown in Figure 3.The diameter of this polygonal inscribed circle is identical with the external diameter of the columnar portion 13b of the drift 13 of operation # 2
According to this variation, polygonal non-through hole 12a's ' and drift 13 between contact area less, so the friction between non-through hole 12a ' and drift 13 is little.Therefore, drift 13 easily moves, and heating also is inhibited.When non-through hole 12a ' is the polygonal at odd number angle, drift 13 high to heart effect, therefore preferred the use reduced and the uniformity of cylindrical body 12 thickness is particularly preferably used pentagon or hexagon according to friction.
(the second variation)
Fig. 4 is the figure for explanation the second variation.
In the second variation, the drift that uses in the operation #2 ' that is equivalent to operation # 2 is not the secondary cylindrical shape, but the one-level cylindrical shape.The drift 13 ' that uses in the operation #2 ' of the second variation shown in Figure 4 and among operation #2 ' making bottom tube-like body 14 ' arranged.
Drift 13 ' is uniform in the longitudinal direction external diameter
Cylindrical shape.The non-through hole 14a ' that bottom tube-like body 14 ' is arranged that forms by this drift 13 ' is also uniform in the longitudinal direction internal diameter
Cylindrical shape.
The internal diameter of the preferred non-through hole 12a that bottom tube-like body 12 is arranged that uses and make in operation #1
Identical size.
Even the drift 13 ' in secondary backward extrusion processing is the cylindrical shape of one-level, by the backward extrusion processing of secondary repeatedly, also might produce small step, striped, material inhomogeneous in the inner surface of the non-through hole 14a ' that bottom tube-like body 14 ' is arranged.But, process to eliminate this step, striped, inhomogeneous by the extruding deep-draw of operation # 4.
(the 3rd variation)
Fig. 5 is the figure for explanation the 3rd variation.
In the 3rd variation, in operation # 3, when punching press was carried out in the bottom that bottom tube-like body 14 is arranged, the direction from downside to upside was squeezed into drift 15, but not the upside from Figure 1A is squeezed into drift 15 to the second direction of downside.The direction of the drift 15 in operation # 3 and the drift of last operation # 2 13 are same direction, and therefore, drift 15 and the non-through hole 14a that bottom tube-like body 14 is arranged can realize that high-precision heart yearn aims at.On the other hand, when drift 15 is squeezed into from first direction, need length to a certain degree.Therefore, the external diameter that preferably makes drift 15 is identical with the internal diameter of the non-through hole 14a that bottom tube-like body 14 is arranged or make the external diameter of drift 15 slightly less or slightly large than the internal diameter of the non-through hole 14a that bottom tube-like body 14 is arranged, makes the function of non-through hole 14a performance pilot punch 15.
(the 4th variation)
Fig. 6 is the figure for explanation the 4th variation.
In the 4th variation, when the pin 17 ' of the pin 17 that is equivalent to use in operation # 4 and mould 18 have preposition when concerning, about pin 17 ', be in over the external diameter of the part of the position of the tapered portion 18b external diameter less than the part that is in the position corresponding with the tapered portion 18b of the hole body 18a of mould 18.That is attenuate a little when, pin 17 ' surpasses tapered portion 18b.
With reference to Fig. 6, the external diameter that is in the part of the position corresponding with the tapered portion 18b of pin 17 ' is
The external diameter that is in the part of the position that surpasses tapered portion 18b is
And,
Less than
By this structure, when cylindrical body 19 surpassed tapered portion 18b, the frictional force between cylindrical body 19 and pin 17 ' weakened, and the temperature that therefore can prevent cylindrical body 19 too rises or cylindrical body 19 and pin 17 ' bake out this situation of vestige.
(the 5th variation)
Fig. 7 is the figure for explanation the 5th variation.
In the 5th variation, be equivalent to the internal diameter of the part that surpasses tapered portion 18b of mould 18 ' of the mould 18 that uses greater than the minimum diameter of tapered portion 18b in operation #4.That is, the hole body 18a ' of mould 18 ' enlarges from surpassing the position of tapered portion 18b ' a little.
With reference to Fig. 7, the internal diameter of part that surpasses the tapered portion 18b ' of mould 18 ' is
The minimum diameter of tapered portion 18b is
And,
Greater than
By this structure, when cylindrical body 19 surpassed tapered portion 18b, the frictional force between cylindrical body 19 and mould 8 ' weakened, and therefore can prevent that the temperature of cylindrical body 19 from too rising.
The embodiment of the invention described above is be used to illustration of the present invention is described, is not that scope of the present invention only is defined in these embodiments.Those skilled in the art can implement the present invention with other variety of way in the scope that does not break away from aim of the present invention.
Claims (according to the modification of the 19th of treaty)
1.(deletion)
2.(after revising) a kind of pipe-making method, comprising:
The first operation is carried out the first backward extrusion processing from first direction to workpiece, and making thus first has the bottom tube-like body, wherein, adds and squeezes into the first drift man-hour carrying out described the first backward extrusion;
The second operation, have the bottom tube-like body to carry out the second backward extrusion processing from described first direction to described first, making thus second has the bottom tube-like body, wherein, add man-hour carrying out described the second backward extrusion, have under the inner surface guiding of bottom tube-like body described first and squeeze into the second drift;
The 3rd operation by in the described second bottom opening that the bottom tube-like body arranged, is made the first cylindrical body with through hole; And
The 4th operation processes to make the second cylindrical body by the extruding ironing, wherein, adds man-hour carrying out described extruding ironing, inserts the hole body of selling and described the first cylindrical body is pressed into the first mould in the described through hole of described the first cylindrical body.
3. pipe-making method as claimed in claim 2, is characterized in that,
Described the 4th operation comprises:
The 5th operation is inserted into the described through hole of described the first cylindrical body and the described hole body of described the first mould with described pin, makes described pin form the preposition relation with respect to described the first mould; And
The 6th operation under the state of the described position relationship that keeps described the first mould and described pin, is pressed into described the first cylindrical body the described hole body of described the first mould.
4. pipe-making method as claimed in claim 3, is characterized in that,
Have the cone-shaped part near the insert port of the described hole body of described the first mould,
When described the first mould and described pin were in described position relationship, the external diameter that described pin is in the part that surpasses described cone-shaped part position was in the external diameter of the part of the position corresponding with the described cone-shaped part of described hole body less than described pin.
5.(deletion)
6.(after revising) pipe-making method as described in any one in claim 2～4, it is characterized in that,
Described the first mould has the cone-shaped part near the insert port of described hole body, in described the 4th operation, by described cone-shaped part, form external diameter greater than the marginal portion of other parts in an end of described the second cylindrical body,
Described pipe-making method also has the 7th operation, in the 7th operation, by external diameter three drift identical with the hole body internal diameter of described the second mould, described the second cylindrical body is pressed into the hole body of the second mould from its other end, wherein, described the other end is not formed with described marginal portion, and the internal diameter of described the second mould is identical with the hole body of described the first mould.
7.(deletion)
Claims (7)
1. pipe-making method comprises:
The first operation is carried out the first backward extrusion processing from first direction to workpiece, and making thus first has the bottom tube-like body, wherein, adds and squeezes into the first drift man-hour carrying out described the first backward extrusion;
The second operation, have the bottom tube-like body to carry out the second backward extrusion processing from described first direction to described first, making thus second has the bottom tube-like body, wherein, add man-hour carrying out described the second backward extrusion, have under the inner surface guiding of bottom tube-like body described first and squeeze into the second drift; And
The 3rd operation by in the described second bottom opening that the bottom tube-like body arranged, is made the first cylindrical body with through hole.
2. pipe-making method as claimed in claim 1, is characterized in that,
Also comprise the 4th operation, that is, process to make the second cylindrical body by the extruding ironing, wherein, add man-hour pushing ironing, insert the hole body of selling and described the first cylindrical body is pressed into the first mould in the described through hole of described the first cylindrical body.
3. pipe-making method as claimed in claim 2, is characterized in that,
Described the 4th operation comprises:
The 5th operation is inserted into the described through hole of described the first cylindrical body and the described hole body of described the first mould with described pin, makes described pin form the preposition relation with respect to described the first mould; And
The 6th operation under the state of the described position relationship that keeps described the first mould and described pin, is pressed into described the first cylindrical body the described hole body of described the first mould.
4. pipe-making method as claimed in claim 3, is characterized in that,
Have the cone-shaped part near the insert port of the described hole body of described the first mould,
When described the first mould and described pin were in described position relationship, the external diameter that described pin is in the part that surpasses described cone-shaped part position was in the external diameter of the part of the position corresponding with the described cone-shaped part of described hole body less than described pin.
5. pipe-making method as described in any one in claim 2～4, is characterized in that,
Described the first mould has the cone-shaped part near the insert port of described hole body, surpass the internal diameter of described cone-shaped part partly greater than the minimum diameter of described cone-shaped part.
6. pipe-making method as described in any one in claim 2～5, is characterized in that,
Described the first mould has the cone-shaped part near the insert port of described hole body, in described the 4th operation, by described cone-shaped part, form external diameter greater than the marginal portion of other parts in an end of described the second cylindrical body,
Described pipe-making method also comprises the 7th operation, in the 7th operation, by external diameter three drift identical with the hole body internal diameter of described the second mould, described the second cylindrical body is pressed into the hole body of the second mould from its other end, wherein, described the other end is not formed with described marginal portion, and the internal diameter of described the second mould is identical with the hole body of described the first mould.
7. pipe-making method as described in any one in claim 1～6, is characterized in that,
In the 3rd operation, in the described second bottom opening that the bottom tube-like body arranged, wherein, the external diameter of described the 4th drift is less than the described second internal diameter that the bottom tube-like body arranged by the 4th drift.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2011/071027 WO2013038526A1 (en) | 2011-09-14 | 2011-09-14 | Method for manufacturing pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103108707A true CN103108707A (en) | 2013-05-15 |
| CN103108707B CN103108707B (en) | 2015-05-27 |
Family
ID=47882785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180041413.9A Expired - Fee Related CN103108707B (en) | 2011-09-14 | 2011-09-14 | Method for manufacturing pipe |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5597764B2 (en) |
| CN (1) | CN103108707B (en) |
| WO (1) | WO2013038526A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104209445A (en) * | 2014-08-15 | 2014-12-17 | 宾科汽车紧固件（昆山）有限公司 | Cold-heading device for irregular knurling sleeve and production technique of cold-heading device |
| CN105665596A (en) * | 2016-03-30 | 2016-06-15 | 江苏威鹰机械有限公司 | Manufacturing process for propelling sleeve of parking gear pawl of new energy car |
| CN107617648A (en) * | 2016-07-13 | 2018-01-23 | 冯鸣 | The preparation method of long thin thin seamless pipe |
| TWI671143B (en) * | 2018-11-22 | 2019-09-11 | 台灣福興工業股份有限公司 | Manufacturing method of transmission tube |
| CN111112364A (en) * | 2019-12-25 | 2020-05-08 | 北京机电研究所有限公司 | Stepped deep hole extrusion process suitable for elastomer deep hole extrusion piece |
| CN113102532A (en) * | 2021-04-14 | 2021-07-13 | 中北大学 | Labor-saving forming method suitable for large-size thin-wall conical shell |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6102449B2 (en) * | 2013-04-16 | 2017-03-29 | トヨタ自動車株式会社 | Hollow extrusion molding apparatus and hollow extrusion molding method |
| JP6253488B2 (en) * | 2013-11-07 | 2017-12-27 | 新日鐵住金株式会社 | Front extrusion method, hollow member manufacturing method, and front extrusion processing apparatus |
| WO2024111215A1 (en) * | 2022-11-22 | 2024-05-30 | 株式会社三五 | Method and device for performing extrusion molding of different-thickness pipe having solid portion |
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| US5088311A (en) * | 1989-06-21 | 1992-02-18 | Ngk Spark Plug Co., Ltd. | Method of making a tubular member |
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| CN101829698A (en) * | 2010-03-30 | 2010-09-15 | 河南科技大学 | Extrusion forming process of thin-wall long pipe-shaped part blank with flange and mould |
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| JP2747083B2 (en) * | 1989-06-21 | 1998-05-06 | 日本特殊陶業株式会社 | Manufacturing method of metal shell for spark plug |
| JP5151315B2 (en) * | 2007-07-27 | 2013-02-27 | 阪村産業株式会社 | Method for producing hollow molded body |
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- 2011-09-14 JP JP2013501479A patent/JP5597764B2/en not_active Expired - Fee Related
- 2011-09-14 CN CN201180041413.9A patent/CN103108707B/en not_active Expired - Fee Related
- 2011-09-14 WO PCT/JP2011/071027 patent/WO2013038526A1/en active Application Filing
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| JPS6158939U (en) * | 1984-09-22 | 1986-04-21 | ||
| JPS61266142A (en) * | 1985-05-21 | 1986-11-25 | Honda Motor Co Ltd | Extrusion molding device for annular billet |
| US5088311A (en) * | 1989-06-21 | 1992-02-18 | Ngk Spark Plug Co., Ltd. | Method of making a tubular member |
| JPH09122795A (en) * | 1995-11-06 | 1997-05-13 | Daido Steel Co Ltd | Method for manufacturing hollow steel body |
| CN101829698A (en) * | 2010-03-30 | 2010-09-15 | 河南科技大学 | Extrusion forming process of thin-wall long pipe-shaped part blank with flange and mould |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104209445A (en) * | 2014-08-15 | 2014-12-17 | 宾科汽车紧固件（昆山）有限公司 | Cold-heading device for irregular knurling sleeve and production technique of cold-heading device |
| CN105665596A (en) * | 2016-03-30 | 2016-06-15 | 江苏威鹰机械有限公司 | Manufacturing process for propelling sleeve of parking gear pawl of new energy car |
| CN107617648A (en) * | 2016-07-13 | 2018-01-23 | 冯鸣 | The preparation method of long thin thin seamless pipe |
| TWI671143B (en) * | 2018-11-22 | 2019-09-11 | 台灣福興工業股份有限公司 | Manufacturing method of transmission tube |
| CN111112364A (en) * | 2019-12-25 | 2020-05-08 | 北京机电研究所有限公司 | Stepped deep hole extrusion process suitable for elastomer deep hole extrusion piece |
| CN111112364B (en) * | 2019-12-25 | 2022-07-19 | 北京机电研究所有限公司 | Stepped deep hole extrusion process suitable for elastomer deep hole extrusion piece |
| CN113102532A (en) * | 2021-04-14 | 2021-07-13 | 中北大学 | Labor-saving forming method suitable for large-size thin-wall conical shell |
| CN113102532B (en) * | 2021-04-14 | 2022-03-25 | 中北大学 | Labor-saving forming method suitable for large-size thin-wall conical shell |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013038526A1 (en) | 2013-03-21 |
| CN103108707B (en) | 2015-05-27 |
| JPWO2013038526A1 (en) | 2015-03-23 |
| JP5597764B2 (en) | 2014-10-01 |
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