CN112620351A - Processing technology for hammering cold-drawn pipe - Google Patents
Processing technology for hammering cold-drawn pipe Download PDFInfo
- Publication number
- CN112620351A CN112620351A CN202011202266.6A CN202011202266A CN112620351A CN 112620351 A CN112620351 A CN 112620351A CN 202011202266 A CN202011202266 A CN 202011202266A CN 112620351 A CN112620351 A CN 112620351A
- Authority
- CN
- China
- Prior art keywords
- treatment
- hammer
- hammering
- cold
- pierced billet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012545 processing Methods 0.000 title claims abstract description 27
- 238000005516 engineering process Methods 0.000 title claims abstract description 18
- 238000002844 melting Methods 0.000 claims abstract description 27
- 230000008018 melting Effects 0.000 claims abstract description 27
- 239000007787 solid Substances 0.000 claims abstract description 27
- 239000002253 acid Substances 0.000 claims abstract description 18
- 238000007689 inspection Methods 0.000 claims abstract description 16
- 230000001050 lubricating effect Effects 0.000 claims abstract description 15
- 238000005554 pickling Methods 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 11
- 238000010009 beating Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000010622 cold drawing Methods 0.000 claims description 5
- 229910000885 Dual-phase steel Inorganic materials 0.000 claims description 3
- 239000006104 solid solution Substances 0.000 claims 1
- 238000005406 washing Methods 0.000 abstract description 5
- 241000251131 Sphyrna Species 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 5
- 150000004965 peroxy acids Chemical class 0.000 description 5
- 206010070834 Sensitisation Diseases 0.000 description 4
- 230000008313 sensitization Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000005120 petroleum cracking Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/06—Rolling hollow basic material, e.g. Assel mills
- B21B19/10—Finishing, e.g. smoothing, sizing, reeling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/06—Rolling hollow basic material, e.g. Assel mills
- B21B19/08—Enlarging tube diameter
Abstract
The invention relates to the technical field related to a processing technology of a cold-drawn pipe hammer, and discloses a processing technology for a cold-drawn pipe hammer, which comprises the following steps: s1, hot hammer: after solid melting and cooling, straightening, pickling, primary inspection and finishing, hammering treatment and lubricating are sequentially carried out on the blank pierced billet, and the finished product is directly subjected to primary inspection and finishing, hammering treatment and lubricating treatment; s2, hot hammer: performing primary inspection, finishing and hammering treatment on the pierced billet core diameter with the outer diameter phi larger than 70mm in sequence, then performing lubricating treatment, and performing 1-2 times of circular processing in sequence; the diameter of the pierced billet core with the external diameter phi of less than or equal to 70mm is subjected to hammering treatment, solid melting treatment and acid cleaning treatment in sequence, and 1-2 times of circular processing is carried out in sequence. According to the processing technology for the hammer head of the cold-drawn pipe, the cold processing flow is tested and improved, the hammer head of the pierced billet is improved after acid washing and finishing, and the distance between the hammer heads is controlled without acid washing after the hammer head.
Description
Technical Field
The invention relates to the technical field related to a processing technology of a cold-drawn pipe hammer, in particular to a processing technology for a cold-drawn pipe hammer.
Background
The cold-drawn steel pipe is one of steel pipes, which is classified according to different production processes, is different from a hot-rolled (expanded) pipe, is formed by cold-drawing a rough pipe blank or a raw material pipe for multiple passes in the process of expanding the diameter, and is usually carried out on a single-chain type or double-chain type cold-drawing machine of 0.5-100T, and the cold-rolled (expanded) steel pipe comprises a carbon thin-wall steel pipe, an alloy thin-wall steel pipe, a stainless steel pipe, a petroleum cracking pipe, a machining pipe, a thick-wall pipe, a small-caliber internal-mold cold-drawn pipe and other steel pipes besides a common steel pipe, a low-medium-pressure boiler steel pipe, a high-pressure boiler steel pipe, an alloy steel pipe, a stainless steel pipe, a petroleum cracking. Its external diameter of cold drawn steel pipe can reach 6mm, and the wall thickness can reach 0.25mm, and the thin wall pipe external diameter can reach 5mm wall thickness and be less than 0.25mm size, and precision and surface quality all are obviously superior to hot rolling (expand) pipe, nevertheless receive the technology restriction, and its bore and length all receive certain restriction, and when the hammer of cold drawn pipe pierced billet was handled, some technical problem easily appear in current processing technology:
1. peracid is easily generated at the position of 0.3-0.5m of the end part of the hammer head of the cold drawn pipe, and is fruit acid caused by the fact that the heat affected zone of the hammer head is sensitive and is scrapped due to peracid caused by the fact that the hammer head of the cold drawn pipe is over-burnt;
2. acid washing and acid corrosion are carried out after the hammer head;
3. the oxide skin behind the hammer head is not acid-washed and is easy to be rough, and defective products are produced.
In order to solve the technical problems, the inventor designs a processing technology for a cold-drawing pipe hammer, optimizes the production technology of the cold-drawing pipe hammer and improves the production quality of products.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a processing technology for a cold-drawn pipe hammer, which effectively avoids the peracid phenomenon caused by a heat affected zone of the cold-drawn pipe hammer and solves the problem that the existing cold-drawn pipe hammer processing technology is easy to generate defective products.
(II) technical scheme
In order to achieve the purpose of avoiding peracid caused by a heat affected zone of a hammer head of the cold-drawn pipe, the invention provides the following technical scheme: a processing technology for a hammer of a cold-drawn pipe comprises the following steps:
s1, hot hammer: after solid melting and cooling, straightening, pickling, primary inspection and finishing, hammering treatment and lubricating are sequentially carried out on the blank pierced billet, and the finished product is directly subjected to primary inspection and finishing, hammering treatment and lubricating treatment;
s2, hot hammer: performing primary inspection, finishing and hammering treatment on the pierced billet core diameter with the outer diameter phi larger than 70mm in sequence, then performing lubricating treatment, and performing 1-2 times of circular processing in sequence; the diameter of the pierced billet core with the outer diameter phi of less than or equal to 70mm is subjected to hammering treatment, solid melting treatment and acid pickling treatment in sequence, and 1-2 times of circular processing are performed in sequence;
s3, cold hammer head: the method comprises the following steps of (1) sequentially carrying out hammering, solid melting and lubricating treatment on pierced billets with pierced billet wall thicknesses smaller than 3 mm;
s4, hot-hammer beating: repeatedly hammering the pierced billet, wherein solid melting and acid pickling treatment are required after each hammering deformation;
s5, Chinese hammer beating: the method comprises the following steps that (1) solid melting heating is needed for carrying out hammer treatment on pierced billets with thicker wall thicknesses, and the pierced billets with thinner wall thicknesses are directly subjected to cold hammer treatment;
s6, deoiling: the dual-phase steel pierced billet with the outer diameter phi less than 60mm needs to be subjected to deoiling treatment, and pierced billets with other specifications do not need to be subjected to deoiling treatment
Preferably, the temperature of the solid melting treatment is 1060 ℃, and the solid melting time ranges from 20 min to 30 min.
Preferably, the pierced billet is subjected to head beating treatment after acid pickling and initial detection and finishing in the step S1, so that acid pickling in a head sensitization area is avoided, and surface galling of the pierced billet is effectively avoided.
Preferably, the cold drawn pipe hammering treatment is carried out by adopting an air hammer.
Preferably, the hammer treatment is carried out after the solid melting and heating of the pierced billet with the pierced billet wall thickness of more than or equal to 3mm in the step S5, the sensitization is effectively eliminated through the solid melting treatment after the hot hammer treatment, and the cold hammer treatment is directly carried out on the pierced billet with the pierced billet wall thickness of less than 3 mm.
(III) advantageous effects
Compared with the prior art, the invention provides a processing technology for a cold-drawn pipe hammer, which has the following beneficial effects:
this a processing technology for cold drawn pipe is beated head, under the prerequisite that does not increase manufacturing cost, only adjusted process flow, the pierced billet is beated the head after the primary inspection finishing treatment, because of not beating the head during the primary inspection, be convenient for finishing workshop coping pierced billet internal surface defect, the deoiling treatment flow of cold drawn pipe has been cancelled simultaneously, the acidification risk of the peracid processing of product in sour jar has been reduced, the effectual manufacturing cost who reduces the product, to through testing improvement to cold working flow, the pierced billet is through the pickling, carry out the tup after the finishing and improve, do not pass through the pickling behind the tup, need control the tup interval.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides the following technical scheme: a processing technology for a hammer of a cold-drawn pipe comprises the following steps:
s1, hot hammer: after solid melting and cooling, straightening, pickling, primary inspection and finishing, hammering treatment and lubricating are sequentially carried out on the blank pierced billet, and the finished product is directly subjected to primary inspection and finishing, hammering treatment and lubricating treatment;
the solid melting treatment temperature is 1060 ℃, the solid melting time range is 20-30min, the pierced billet is subjected to acid cleaning, primary inspection and finishing in the step S1, the acid cleaning in a hammer sensitization area is avoided, the surface of the pierced billet is effectively prevented from being roughened, and the cold drawn tube is subjected to processing treatment by adopting an air hammer.
S2, hot hammer: performing primary inspection, finishing and hammering treatment on the pierced billet core diameter with the outer diameter phi larger than 70mm in sequence, then performing lubricating treatment, and performing 1-2 times of circular processing in sequence; the diameter of the pierced billet core with the outer diameter phi of less than or equal to 70mm is subjected to hammering treatment, solid melting treatment and acid pickling treatment in sequence, and 1-2 times of circular processing are performed in sequence;
s3, cold hammer head: the method comprises the following steps of (1) sequentially carrying out hammering, solid melting and lubricating treatment on pierced billets with pierced billet wall thicknesses smaller than 3 mm;
s4, hot-hammer beating: repeatedly hammering the pierced billet, wherein solid melting and acid pickling treatment are required after each hammering deformation;
s5, Chinese hammer beating: and (2) performing solid melting heating on the pierced billets with thicker wall thicknesses to perform head hammering treatment, performing direct cold head hammering treatment on the pierced billets with thinner wall thicknesses, performing head hammering treatment after the solid melting heating of the pierced billets with the wall thicknesses of more than or equal to 3mm in the step S5, effectively eliminating sensitization through the solid melting treatment after the hot head hammering, and performing direct cold head hammering treatment on the pierced billets with the wall thicknesses of less than 3 mm.
S6, deoiling: the dual-phase steel pierced billet with the outer diameter phi less than 60mm needs to be subjected to deoiling treatment, and pierced billets with other specifications do not need to be subjected to deoiling treatment
The invention has the beneficial effects that: through testing improvement on a cold machining process, the hammer head of a pierced billet is improved after acid washing and finishing, and the distance between the hammer heads needs to be controlled without acid washing behind the hammer heads.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A processing technology for a hammer of a cold-drawn pipe is characterized by comprising the following steps:
s1, hot hammer: after solid melting and cooling, straightening, pickling, primary inspection and finishing, hammering treatment and lubricating are sequentially carried out on the blank pierced billet, and the finished product is directly subjected to primary inspection and finishing, hammering treatment and lubricating treatment;
s2, hot hammer: performing primary inspection, finishing and hammering treatment on the pierced billet core diameter with the outer diameter phi larger than 70mm in sequence, then performing lubricating treatment, and performing 1-2 times of circular processing in sequence; the diameter of the pierced billet core with the outer diameter phi of less than or equal to 70mm is subjected to hammering treatment, solid melting treatment and acid pickling treatment in sequence, and 1-2 times of circular processing are performed in sequence;
s3, cold hammer head: the method comprises the following steps of (1) sequentially carrying out hammering, solid melting and lubricating treatment on pierced billets with pierced billet wall thicknesses smaller than 3 mm;
s4, hot-hammer beating: repeatedly hammering the pierced billet, wherein solid melting and acid pickling treatment are required after each hammering deformation;
s5, Chinese hammer beating: the method comprises the following steps that (1) solid melting heating is needed for carrying out hammer treatment on pierced billets with thicker wall thicknesses, and the pierced billets with thinner wall thicknesses are directly subjected to cold hammer treatment;
s6, deoiling: the dual-phase steel pierced billet with the outer diameter phi less than 60mm needs to be subjected to deoiling treatment, and pierced billets with other specifications do not need to be subjected to deoiling treatment.
2. The process according to claim 1, wherein the temperature of the solid melting treatment is 1060 ℃ and the solid melting time is 20-30 min.
3. The process of claim 1, wherein the pickling of the pierced billet in the step S1, the initial inspection and finishing, and then the hammering treatment effectively prevent the surface of the pierced billet from galling.
4. The process of claim 1, wherein the cold-drawing hammer is processed by an air hammer.
5. The process of claim 1, wherein the pierced billet with the pierced billet wall thickness of 3mm or more in the step S5 is subjected to solid-solution heating to perform the piercing treatment, and the pierced billet with the pierced billet wall thickness of 3mm or less is subjected to direct cold piercing treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011202266.6A CN112620351A (en) | 2020-11-02 | 2020-11-02 | Processing technology for hammering cold-drawn pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011202266.6A CN112620351A (en) | 2020-11-02 | 2020-11-02 | Processing technology for hammering cold-drawn pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112620351A true CN112620351A (en) | 2021-04-09 |
Family
ID=75303227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011202266.6A Pending CN112620351A (en) | 2020-11-02 | 2020-11-02 | Processing technology for hammering cold-drawn pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112620351A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101551040A (en) * | 2008-04-02 | 2009-10-07 | 上海凯斯特钢管制造有限公司 | Large-caliber stainless steel seamless pipe and processing method thereof |
| CN102019301A (en) * | 2010-12-30 | 2011-04-20 | 天津冶金集团天材科技发展有限公司 | Cold-drawing process for aviation-grade seamless stainless steel tube |
| CN102179437A (en) * | 2011-01-14 | 2011-09-14 | 常熟市无缝钢管有限公司 | Head driving process of hammer head of hot rolling pierced billet |
| CN103624102A (en) * | 2013-12-04 | 2014-03-12 | 海盐三鑫钢管有限公司 | Method for processing cold-drawing oil cylinder pipe |
| CN105834234A (en) * | 2016-03-29 | 2016-08-10 | 重庆钢铁(集团)有限责任公司 | Two-pass continuous drawing method for producing cold-drawn steel pipe |
-
2020
- 2020-11-02 CN CN202011202266.6A patent/CN112620351A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101551040A (en) * | 2008-04-02 | 2009-10-07 | 上海凯斯特钢管制造有限公司 | Large-caliber stainless steel seamless pipe and processing method thereof |
| CN102019301A (en) * | 2010-12-30 | 2011-04-20 | 天津冶金集团天材科技发展有限公司 | Cold-drawing process for aviation-grade seamless stainless steel tube |
| CN102179437A (en) * | 2011-01-14 | 2011-09-14 | 常熟市无缝钢管有限公司 | Head driving process of hammer head of hot rolling pierced billet |
| CN103624102A (en) * | 2013-12-04 | 2014-03-12 | 海盐三鑫钢管有限公司 | Method for processing cold-drawing oil cylinder pipe |
| CN105834234A (en) * | 2016-03-29 | 2016-08-10 | 重庆钢铁(集团)有限责任公司 | Two-pass continuous drawing method for producing cold-drawn steel pipe |
Non-Patent Citations (1)
| Title |
|---|
| 刘云才: "国内外航空精密钢管生产现状", 《四川冶金》 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20210409 |