CN2530742Y - Tube mill mandrel - Google Patents
Tube mill mandrel Download PDFInfo
- Publication number
- CN2530742Y CN2530742Y CN 02203193 CN02203193U CN2530742Y CN 2530742 Y CN2530742 Y CN 2530742Y CN 02203193 CN02203193 CN 02203193 CN 02203193 U CN02203193 U CN 02203193U CN 2530742 Y CN2530742 Y CN 2530742Y
- Authority
- CN
- China
- Prior art keywords
- plug
- mandrel
- ring
- shaped
- tube mill
- 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.)
- Expired - Lifetime
Links
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 13
- 239000011651 chromium Substances 0.000 claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 abstract description 5
- 239000010959 steel Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000003801 milling Methods 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 14
- 238000000137 annealing Methods 0.000 description 7
- 230000007547 defect Effects 0.000 description 4
- 230000002950 deficient Effects 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000009785 tube rolling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Images
Landscapes
- Electroplating Methods And Accessories (AREA)
Abstract
The utility model discloses a tube mill mandrel, belonging to the tube milling instrument of the tube mill in the limit mandrel connecting tube miller set producing the gapless steel tubes through hot press. The utility model consists of a mandrel center(1), a ring-shaped resurfacing welded layer(2) and a ring-shaped chromium plated layer(3) and is characterized in that the ring-shaped resurfacing welded layer is cast on the mandrel center, the ring-shaped chromium plated layer is electrically plated on the ring-shaped resurfacing welded layer, the mandrel center is good in obdurability and in wearing resistance so that the requirement of the tube mill is satisfied. The utility model is also characterized in that the old mandrel can be replaced and brings a wide prospect for the production and upgrading of the tube mill mandrel.
Description
Technical field
The utility model relates to a kind of hot rolled seamless steel tube and produces the tube rolling instrument, particularly relates to a kind of retained mandrel continuous rolling-tube unit mandrel bar.
Background technology
At present, known plug cross-sectional configuration is made up of plug heart portion and chrome-faced layer.After the steel pipe of mandrel rolling some, defectives such as wearing and tearing, scuffing, crackle appear in its surface, and when the defective effect tube quality, plug can not continue use and become old plug figure.Because defective is dark (greater than 4mm), old plug transformation of the way back external diameter diminishes, and can not return to original specification, and mandrel material can not make full use of.
The utility model content
Repair plug in order to overcome according to existing plug cross-sectional configuration, can not increase cross dimensions and the deficiency that can not return to original specification, the utility model provides a kind of plug, and it not only satisfies the tube rolling requirement fully, and can make old plug transformation of the way back cross dimensions increase and return to original specification.
The technical scheme that its technical problem that solves the utility model adopts is: the plug cross-sectional configuration is made up of plug heart portion (1), annular stack layer (2), annular chromium coating (3).It is characterized in that: the founding of annular stack layer is in plug heart portion, the annular chromium coating is electroplated on the annular stack layer, its feature also is: the annular stack layer increases the plug cross dimensions, reach the purpose that plug recovers original specification, after the chromium plating of annular stack layer, reach the purpose that plug recovers the initial surface state.
The beneficial effects of the utility model are, plug heart portion has good obdurability, and the surface has good wearability, and is simple in structure, and material makes full use of, and reduces cost.
Description of drawings
Fig. 1 is the front view of mandrel bar;
Fig. 2 is the cutaway view along A-A line among Fig. 1;
Fig. 3 is the front view of old plug;
Fig. 4 is the cutaway view along A-A line among Fig. 3;
Fig. 5 is the front view of old plug processing;
Fig. 6 is the cutaway view along A-A line among Fig. 5;
Fig. 7 is the front view of plug built-up welding;
Fig. 8 is the cutaway view along A-A line among Fig. 7;
Fig. 9 is the front view of plug built-up welding processing;
Figure 10 is the cutaway view along A-A line among Fig. 9;
Figure 11 is the front view of plug blank;
Figure 12 is the cutaway view along A-A line among Figure 15:
1. plug heart portions among the figure, 2. annular stack layer, 3. annular chromium coating, 3. ring defect layer,
4. weld seam.
The specific embodiment
The utility model is achieved in that through the preheating of plug blank, plug built-up welding, plug annealing, plug processing, plug chromium plating and forms that its technical characterictic is: it is to implement by following technology:
One, plug blank Figure 11 preheating
Preheating before the plug built-up welding, preheat temperature is 250-300 ℃,
Programming rate≤45 ℃/h, temperature retention time 2--3 hour,
Two, plug built-up welding Fig. 7
After the plug electric welding built-up welding, surface weld (5) twist, weld seam is excessively level and smooth,
Its cross section annular stack layer founding does not allow to exist slag inclusion, gas in plug heart portion
Defectives such as bubble, pore, crackle,
Three, plug annealing
Annealing in time after the plug built-up welding, annealing temperature is 500-550 ℃,
Firing rate≤45 ℃/h, temperature retention time 6--8 hour,
Plug is cooled to 110 ℃ with stove and comes out of the stove, and air cooling is to room temperature,
Four, plug built-up welding manuscript 9
Plug annealing back roughing, fine finishining, polishing,
Total length glacing flatness≤5mm,
Mandrel surface hardness is HB 340-380,
Five, plug chromium plating:
Annular chromium coating (3) thickness is 0.0045-0.0065mm.
The specific embodiment of the new and old plug of the utility model is described below in conjunction with embodiment:
Embodiment:
One, selects materials
1. the H13 steel among the standard A STM is made, old plug Fig. 3,
2. specification is φ 166.6mm, and length is 15m,
3. specification is φ 156mm after the removal of defects, total length glacing flatness≤5mm,
4. ultrasonic examination inspection, credit rating φ l≤1,
Two, plug preheating
Heating-up temperature is 280 ℃, and programming rate is 40 ℃/h, is incubated 3 hours,
Three, plug built-up welding
1. lathe rotating speed, the electric welding machine soldering tip speed of service and weldering thereof are adjusted in electric welding automatic surfacing
Silk feeding speed,
2. the welding wire specification is φ 4mm,
3. specification is φ 176mm after the built-up welding,
4. the mandrel surface weld seam twist, the junction is excessively level and smooth between the per pass weld seam,
Four, plug annealing
Annealing temperature is 540 ℃, and programming rate is 40 ℃/h, temperature retention time 8 hours, with
Heater is but to 110 ℃, and air cooling is to room temperature,
Five, plug processing
1. roughing specification is φ 169mm,
2. fine finishining specification is φ 166.6mm,
3. polishing precision is R
a0.4,
4. case hardness is HB 340-360,
5. plug total length glacing flatness≤4mm,
6. defect detecting test zero defect,
Six, plug chromium plating
Chromium coating thickness is 0.0060mm.
Adopt the utility model specifically to execute the plug that mode is upgraded in fact, on probation on tandem rolling tube machine, the result shows, satisfies the rolled steel tube requirement.
Claims (1)
- A kind of mandrel bar, it is made up of plug heart portion, annular stack layer, annular chromium coating, it is characterized in that: the founding of annular stack layer is in plug heart portion, and annular chromium coating is electroplated on the annular stack layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02203193 CN2530742Y (en) | 2002-02-07 | 2002-02-07 | Tube mill mandrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02203193 CN2530742Y (en) | 2002-02-07 | 2002-02-07 | Tube mill mandrel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2530742Y true CN2530742Y (en) | 2003-01-15 |
Family
ID=33685494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02203193 Expired - Lifetime CN2530742Y (en) | 2002-02-07 | 2002-02-07 | Tube mill mandrel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2530742Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100518989C (en) * | 2004-10-25 | 2009-07-29 | V&M德国有限公司 | Method for production of a seamless hot-finished steel tube and device for carrying out the method |
| CN102091719A (en) * | 2010-12-07 | 2011-06-15 | 宝钢集团常州轧辊制造公司 | Limiting mandrel for mandrel pipe mill and manufacturing method thereof |
-
2002
- 2002-02-07 CN CN 02203193 patent/CN2530742Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100518989C (en) * | 2004-10-25 | 2009-07-29 | V&M德国有限公司 | Method for production of a seamless hot-finished steel tube and device for carrying out the method |
| CN102091719A (en) * | 2010-12-07 | 2011-06-15 | 宝钢集团常州轧辊制造公司 | Limiting mandrel for mandrel pipe mill and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2013000237A1 (en) | Stainless steel hydraulic upright post for mining and processing method thereof | |
| CN1199662A (en) | Planisher for steel pipe welding seam and its producing method | |
| CN103182618A (en) | Overlaying manufacture repair technology for roll forging die | |
| CN101284348B (en) | Preparation technique of sheet welding water cooling tube die | |
| CN109014654A (en) | A kind of compound (again) manufactures Continuous Casting Rolls submerged-arc overlaying welding flux-cored wire and technique | |
| CN111318785A (en) | Process for overlaying aluminum bronze on inner surface of coal mine liquid support 27SiMn oil cylinder | |
| CN1056794C (en) | Preheating-free high anti-cracking surfacing welding electrode | |
| CN114406605B (en) | Friction stir welding repairing method for threaded hole | |
| CN2530742Y (en) | Tube mill mandrel | |
| CN204817674U (en) | A spinning wheel for gas cylinder production | |
| CN1259158C (en) | Spiral welding pipe welding method | |
| CN1267240C (en) | Angular end-to-end welding method for super long and thick steel plates | |
| CN101062507A (en) | Technique for manufacturing mandrel mill by using composite rare earth material | |
| CN106624614B (en) | A kind of manufacturing process of the high-strength welded tube of heavy caliber thick wall | |
| CN202291447U (en) | Double-thread fixed type polycrystalline diamond turning tool | |
| CN114632860B (en) | Aluminum alloy spinning processing technology and application thereof | |
| CN111167872A (en) | Production process and extrusion die of 6061 aluminum alloy pipe | |
| CN1817556A (en) | Flange production | |
| CN114054533B (en) | Extrusion billet with high material utilization rate and manufacturing method thereof | |
| CN1188031A (en) | Square groove welding technology for welding 8-12 mm middle-thick plate by continuous welding rod | |
| CN2743058Y (en) | Vibrating swinging rolling device | |
| CN1172769C (en) | High-cellulose welding electrode | |
| CN112877571A (en) | Zero-zero one-five-millimeter high-performance double-sided photovoltaic cell foil and production method thereof | |
| CN2595472Y (en) | Composite roller | |
| CN216095842U (en) | Rotary wheel for cold rotary machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: 7-40, SHENGSHITAOYUANXINPAI RESIDENTIAL QUATER, KU Free format text: FORMER NAME OR ADDRESS: 11-3-415, HEYUELI, WUXIA STREET, DONGLI DISTRICT, TIANJIN CITY, 300301 |
|
| CP03 | Change of name, title or address |
Patentee address after: Anshan City, Liaoning Province, 114007 miners Tiedong road Taoyuan New District Sheng Shi 7-40 Patentee address before: 300301 Tianjin District of Dongli city street to lotus 11-3-415 |
|
| ASS | Succession or assignment of patent right |
Owner name: XIAO XU Free format text: FORMER OWNER: ZHAO JINFA Effective date: 20090403 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090403 Address after: No. 537, Ou Hua manor, Hunan deep road, Anshan, Liaoning, 114000 Patentee after: Xiao Xu Address before: Liaoning province Anshan City Road miners Tiedong District Sheng Shi Taoyuan new school district 7-40, zip code: 114007 Patentee before: Zhao Jinfa |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120207 Granted publication date: 20030115 |