CN111215832A - Sleeving method of thick-wall short section and barrel - Google Patents
Sleeving method of thick-wall short section and barrel Download PDFInfo
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- CN111215832A CN111215832A CN202010031952.5A CN202010031952A CN111215832A CN 111215832 A CN111215832 A CN 111215832A CN 202010031952 A CN202010031952 A CN 202010031952A CN 111215832 A CN111215832 A CN 111215832A
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- short section
- sleeving
- inner diameter
- barrel
- wall
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
Abstract
The invention discloses a method for sleeving a thick-wall short section and a barrel, and relates to a method for sleeving a thick-wall short section and a barrel. The invention aims to solve the problems that the gap between a short section and a barrel body is too large after the short section and the barrel body are sleeved by the conventional sleeving method, so that the subsequent welding is influenced, and the use performance of a product is reduced. The method comprises the following steps: 1. the outside diameter of the barrel was measured to find the maximum outside diameter D1. 2. And (4) turning the inner diameter of the short section, wherein the size of the inner diameter is controlled to be D1+ 4-8 mm. 3. And a lifting lug is welded on the outer circle of the short section, and a stop block for limiting the final position of the short section is welded on the outer wall of the cylinder body. 4. The hanging short section is gently placed into the cylinder body; 5. and after the short section is sleeved to the stop block, the short section is moved by using a sledge hammer or a jack, so that the allowance is equally divided. The short section is machined for multiple times, the internal stress of parts is gradually released, the roundness of the inner diameter can be controlled within 1mm, and the minimum sleeving gap between the short section and a barrel can be ensured to be 2-4 mm, so that the final gap is controlled. The invention is applied to the field of sleeving of the short section and the barrel.
Description
Technical Field
The invention relates to a sleeving method of a thick-wall short section and a cylinder.
Background
In the manufacturing process of the container, the sleeving of the large-diameter and thick-wall short section and the cylinder body is always a difficult problem, and the method generally used at present is to divide the short section into a plurality of sections and then install the sections on the cylinder body one by one. The petals of the method are generally formed in a split mode or are formed in an integral mode and then split, the roundness of the split molding is not easy to control, the cutting and splitting after the integral molding can generate deformation due to stress release, and the gap between the short section and the barrel after the short section and the barrel are sleeved is too large in both modes, so that the follow-up welding is influenced, and the use performance of the product is reduced. Especially, the welding of the abutted seams is easy to damage the base metal.
And another sleeving method is a hot sleeving method, wherein the short section is heated to expand and then sleeved into the cylinder, and after cooling, the short section contracts and is tightly attached to the cylinder. But the method is adopted to solve the problems that the thermal expansion amount of the short section is not easy to account; secondly, when the workpiece is sleeved, the workpiece is high in temperature, and personnel cannot approach the workpiece to operate; thirdly, the short section is cooled quickly, and once the short section is not sleeved at the position, the short section shrinks and is tightly attached to the cylinder body, so that the subsequent treatment is difficult.
Disclosure of Invention
The invention aims to solve the problems that the gap is too large after the short section and the barrel are sleeved by the conventional sleeving method, so that the subsequent welding is influenced, and the service performance of a product is reduced, and provides a method for sleeving the thick-wall short section and the barrel.
The sleeving method of the thick-wall short section and the barrel comprises the following steps:
firstly, measuring the maximum outer diameter D1 of the cylinder;
secondly, turning the inner diameter of the short section, wherein the inner diameter is D1+ (4-8) mm; the inner diameter machining method of the short section comprises the following steps: placing the short section on a clamping platform, then pressing the upper surface of the short section by using a pressing plate, and then turning; the allowance of the inner diameter of the short section is (6-10) mm, the short section is processed in three times, half of the allowance is processed for the first time, the allowance is processed to the allowance of 2mm for the second time, and the allowance is processed to the inner diameter size for the third time;
thirdly, welding lifting lugs on the outer ring surface of the short section; welding a stop block on the outer wall of the cylinder;
fourthly, the hoisting short section is sleeved on the outer side of the cylinder body, and the short section is clamped to the position of the stop block.
The invention has the following beneficial effects:
the short section of the invention is processed for a plurality of times, the internal stress of the part is gradually released, and the roundness of the inner diameter can be controlled within 1 mm. Can guarantee that nipple joint and barrel minimum suit clearance be 2 ~ 4mm to control final clearance, do not influence follow-up welding. The pipe nipple is integrally sleeved, the sleeving process is simple, the efficiency is high, and the labor intensity of operators is low. The sleeving is finished without splicing seams, and the base material is not damaged. Only one part of the cylinder body is cold-worked, the tolerance accumulation of the cylinder body and the cylinder body is small, and the final sleeving gap is relatively controllable.
Drawings
FIG. 1 is a schematic view of the diameter of a cylinder in a first step of the embodiment;
FIG. 2 is a schematic view of the processing of the middle short section in the first embodiment;
FIG. 3 is an enlarged view of portion A of FIG. 2; wherein 1 is a pressure plate, 2 is a short section, and 3 is a clamping platform;
FIG. 4 is a diagram of a set of four steps in one embodiment; wherein 2 is a short section, 4 is a lifting lug, 5 is a cylinder body, 6 is a final position of the short section, 7 is a stop block, and 8 is a crane;
FIG. 5 is an enlarged view of the short section B in FIG. 4;
FIG. 6 is an enlarged view of the stopper of FIG. 4 at section C;
FIG. 7 is a diagram of a real object of the processing short section in the first embodiment;
FIG. 8 is a diagram of a pup joint and a barrel body sleeved together in the first embodiment.
Detailed Description
The technical solution of the present invention is not limited to the following specific embodiments, but includes any combination of the specific embodiments.
The first embodiment is as follows: the sleeving method of the thick-wall short section and the barrel body is carried out according to the following steps:
firstly, measuring the maximum outer diameter D1 of the cylinder;
secondly, turning the inner diameter of the short section, wherein the inner diameter is D1+ (4-8) mm; the inner diameter machining method of the short section comprises the following steps: placing the short section on a clamping platform, then pressing the upper surface of the short section by using a pressing plate, and then turning; the allowance of the inner diameter of the short section is (6-10) mm, the short section is processed in three times, half of the allowance is processed for the first time, the allowance is processed to the allowance of 2mm for the second time, and the allowance is processed to the inner diameter size for the third time;
thirdly, welding lifting lugs on the outer ring surface of the short section; welding a stop block on the outer wall of the cylinder;
fourthly, the hoisting short section is sleeved on the outer side of the cylinder body, and the short section is clamped to the position of the stop block.
In the embodiment, a gap between the short section and the cylinder body is adjusted by adopting a sledge hammer or a jack, so that the gap is uniformly divided, namely the central point of the short section is coincided with the central axis of the cylinder body.
The embodiment has the following beneficial effects:
the short section of the embodiment is processed for multiple times, the internal stress of the part is gradually released, and the roundness of the inner diameter can be controlled within 1 mm. Can guarantee that nipple joint and barrel minimum suit clearance be 2 ~ 4mm to control final clearance, do not influence follow-up welding. The whole short section is sleeved, the sleeving process is simple and efficient, and the labor intensity of operators is low. The sleeving is finished without splicing seams, and the base material is not damaged. Only one part of the cylinder body is cold-worked, the tolerance accumulation of the cylinder body and the cylinder body is small, and the final sleeving gap is relatively controllable.
The second embodiment is as follows: the present embodiment is different from the specific embodiment in that: and in the second step, the inner diameter of the short section is D1+6 mm. The rest is the same as the first embodiment.
The third concrete implementation mode: the present embodiment differs from the first or second embodiment in that: and in the step two, in the short section inner diameter machining, the pressing plate is loosened every time the short section inner diameter machining is finished, and then the short section is pressed tightly by the pressing plate again. The other is the same as in the first or second embodiment.
The internal diameter surplus should divide the processing of cubic to accomplish in this embodiment, and half surplus is processed for the first time, and the processing is to surplus 2mm surplus for the second time, and processing to the size for the third time, once processed and loosen the clamp plate and compress tightly again, prevents that a processing volume is too big, leads to loosening back nipple joint and warp.
The fourth concrete implementation mode: the present embodiment is different from the first to third embodiments in that: and in the third step, 3 or 4 lifting lugs are welded on the outer ring surface of the short section, and the lifting lugs are uniformly distributed along the circumferential direction. The others are the same as in one of the first to third embodiments.
The fifth concrete implementation mode: the present embodiment is different from the first to the fourth embodiments in that: in the third step, the outer wall of the cylinder body is welded with the stop blocks which are uniformly distributed along the circumferential direction; the number of the stop blocks is more than or equal to 3. The other is the same as one of the first to fourth embodiments.
The effect of the invention is demonstrated by the following examples:
the sleeving method of the thick-wall short section and the cylinder body comprises the following steps:
firstly, measuring a large diameter D1 and a small diameter D2 of a cylinder body; the measurement schematic is shown in fig. 1;
secondly, turning the inner diameter of the short section, wherein the inner diameter is D1+6 mm; the inner diameter machining method of the short section comprises the following steps: placing the short section on a clamping platform, then pressing the upper surface of the short section by using a pressing plate, and then turning; the allowance of the inner diameter of the short section is 6mm, the short section is processed in three times, the allowance of 3mm is processed for the first time, the allowance of 2mm is processed for the second time, and the allowance of the inner diameter is processed for the third time; wherein the processing schematic diagram of the short section is shown in figures 2 and 3; wherein clamp plate 1 is located dress card platform 3 tops, and is connected through bolt and dress card platform 3, and dress card platform 3 is arranged in to nipple joint 2 on, then uses clamp plate 1 to compress tightly at 2 upper surfaces of nipple joint and processes.
Thirdly, 4 lifting lugs are welded on the outer ring surface of the short section and are uniformly distributed along the circumferential direction; 3 stop blocks are welded on the outer wall of the cylinder body and are uniformly distributed along the circumferential direction;
fourthly, hoisting the short section by using a crane to be sleeved outside the cylinder, adjusting the gap between the short section and the cylinder by using a jack after the short section is sleeved to the position of the stop block, and uniformly dividing the allowance, wherein the schematic diagram of the sleeving is shown in figures 4, 5 and 6.
The picture of the entity of processing nipple joint is shown as 7 in this embodiment, and the picture of the entity of nipple joint and barrel after the suit is shown as 8.
In this embodiment, the short section is processed for multiple times, the internal stress of the part is gradually released, and the roundness of the inner diameter can be controlled within 1 mm. Can guarantee that nipple joint and barrel minimum suit clearance be 2 ~ 4mm to control final clearance. The whole short section is sleeved, the sleeving process is simple and efficient, and the labor intensity of operators is low. The sleeving is finished without splicing seams, and the base material is not damaged. Only one part of the cylinder body is cold-worked, the tolerance accumulation of the cylinder body and the cylinder body is small, and the final sleeving gap is relatively controllable.
Claims (5)
1. A sleeving method of a thick-wall short section and a cylinder body is characterized by comprising the following steps:
firstly, measuring the maximum outer diameter D1 of the cylinder;
secondly, turning the inner diameter of the short section, wherein the inner diameter is D1+ (4-8) mm; the inner diameter machining method of the short section comprises the following steps: placing the short section on a clamping platform, then pressing the upper surface of the short section by using a pressing plate, and then turning; the allowance of the inner diameter of the short section is (6-10) mm, the short section is processed in three times, half of the allowance is processed for the first time, the allowance is processed to the allowance of 2mm for the second time, and the allowance is processed to the inner diameter size for the third time;
thirdly, welding lifting lugs on the outer ring surface of the short section; welding a stop block on the outer wall of the cylinder;
fourthly, the hoisting short section is sleeved on the outer side of the cylinder body, and the short section is clamped to the position of the stop block.
2. The method for sleeving the thick-wall short section and the cylinder body according to claim 1, wherein in the second step, the inner diameter of the short section is D1+6 mm.
3. The method for sleeving the thick-wall short section and the cylinder body according to claim 1, wherein in the step two, in the process of the inner diameter of the short section, the pressure plate is loosened every time the process is finished, and then the pressure plate is used for pressing the short section again.
4. The method for sleeving the thick-wall short section and the barrel body according to claim 1, wherein 3 or 4 lifting lugs are welded on the outer circumferential surface of the short section in the third step, and the lifting lugs are uniformly distributed in the circumferential direction.
5. The method for sleeving the thick-wall short section with the cylinder body according to claim 1, wherein in the third step, stop blocks are welded on the outer wall of the cylinder body and are uniformly distributed along the circumferential direction; the number of the stop blocks is more than or equal to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010031952.5A CN111215832A (en) | 2020-01-13 | 2020-01-13 | Sleeving method of thick-wall short section and barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010031952.5A CN111215832A (en) | 2020-01-13 | 2020-01-13 | Sleeving method of thick-wall short section and barrel |
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| CN111215832A true CN111215832A (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010031952.5A Pending CN111215832A (en) | 2020-01-13 | 2020-01-13 | Sleeving method of thick-wall short section and barrel |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040035590A1 (en) * | 2002-08-23 | 2004-02-26 | Richard Bennett M. | Self -conforming screen |
| CN102626886A (en) * | 2012-04-20 | 2012-08-08 | 浙江进泰机械设备有限公司 | Bearing ring turning and cutting feed method |
| CN105750832B (en) * | 2014-12-18 | 2018-08-14 | 中国石油天然气集团公司 | The production method of composite bimetal pipe |
| CN209651728U (en) * | 2019-04-08 | 2019-11-19 | 中国十九冶集团有限公司 | The hanging apparatus of thin-wall barrel workpiece |
-
2020
- 2020-01-13 CN CN202010031952.5A patent/CN111215832A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040035590A1 (en) * | 2002-08-23 | 2004-02-26 | Richard Bennett M. | Self -conforming screen |
| CN102626886A (en) * | 2012-04-20 | 2012-08-08 | 浙江进泰机械设备有限公司 | Bearing ring turning and cutting feed method |
| CN105750832B (en) * | 2014-12-18 | 2018-08-14 | 中国石油天然气集团公司 | The production method of composite bimetal pipe |
| CN209651728U (en) * | 2019-04-08 | 2019-11-19 | 中国十九冶集团有限公司 | The hanging apparatus of thin-wall barrel workpiece |
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Application publication date: 20200602 |
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