CN108747266B - Surface protection device and method for shaft parts with complex shapes - Google Patents
Surface protection device and method for shaft parts with complex shapes Download PDFInfo
- Publication number
- CN108747266B CN108747266B CN201810691262.5A CN201810691262A CN108747266B CN 108747266 B CN108747266 B CN 108747266B CN 201810691262 A CN201810691262 A CN 201810691262A CN 108747266 B CN108747266 B CN 108747266B
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- Prior art keywords
- valve core
- sleeve
- surface protection
- protection device
- heat
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000002390 adhesive tape Substances 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 4
- 239000004800 polyvinyl chloride Substances 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 description 8
- 238000007789 sealing Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Classifications
-
- 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
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a surface protection device and a method for shaft parts with complex shapes, wherein the surface protection device comprises a protection part, a sleeve part and a clamping part, and the spherical protection part, the sleeve part and the clamping part are integrally arranged and are manufactured by a heat shrinkage sleeve; the spherical surface protection part is sleeved on the spherical surface of the valve core, the sleeve part is sleeved on the valve core shaft lever, and the clamping part is arranged at the step of the valve core shaft lever; the diameter of the heat-shrinkable sleeve is larger than the maximum diameter of the surface to be protected, and the minimum diameter of the heat-shrinkable sleeve after heat shrinkage is smaller than the diameter of the valve mandrel. The invention can effectively protect shaft parts with complex shapes, is convenient to detach, and has wide application range and low cost.
Description
Technical Field
The invention relates to a surface protection technology, in particular to a surface protection device and method for shaft parts with complex shapes.
Background
When the valve is manufactured, a valve core (back-to-back ball valve) is required to be installed in the valve body, then fasteners at flanges of the left valve body and the right valve body are assembled, and the valve core and the valve body are sealed by valve lines, as shown in figure 1. The valve core is a shaft part with a complex shape, and the surface machining precision of the sealing surface is high. When the fastener is assembled, the flange is required to be rotated, the valve core inevitably jumps at the moment, so that the spherical surface of the valve core collides with a valve wire, the valve wire sealing pair is invalid, the product is required to be decomposed greatly and reworked again,
in order to prevent damage to the sealing surface of the part, the surface needs to be protected; the protective sleeve is also required to be disassembled after the fastening piece at the flange is fastened.
The invention patent 201410262531.8 discloses a protective sleeve, which comprises a fan-shaped body made of elastic materials, wherein the bottom of the body is provided with a circular sheet, two ends of the bottom of the body are connected and form a pocket bottom together with the circular sheet, the circular sheet gradually and downwards sinks from the periphery to the middle, two sides of the body are provided with matched zippers, one ends of the zippers are fixed at the top of the body, the other ends of the zippers are fixed at the bottom of the body, the top of the body is provided with a buckle belt with adjustable length, and two ends of the buckle belt are respectively distributed at two sides of the zippers.
Disclosure of Invention
The invention aims to provide a surface protection device and a surface protection method for shaft parts with complex shapes, which effectively protect the parts, and have low cost and convenient disassembly and assembly.
The technical solution for realizing the purpose of the invention is as follows: a surface protection device of a shaft part with a complex shape comprises a protection part, a sleeve part and a clamping part; the protection part, the sleeve part and the clamping part are integrally arranged and are manufactured by a heat shrinkage sleeve; the protection part is sleeved on the spherical surface of the valve core, the sleeve part is sleeved on the valve core shaft lever, and the clamping part is arranged at the step of the valve core shaft lever; the diameter of the heat-shrinkable sleeve is larger than the maximum diameter of the surface to be protected, and the minimum diameter of the heat-shrinkable sleeve after heat shrinkage is smaller than the diameter of the valve mandrel.
The surface protection method of the complex-shape shaft part is characterized in that the spherical surface of the valve core is protected by a surface protection device, and the surface protection device is manufactured by a heat shrinkage sleeve and comprises a protection part, a sleeve part and a clamping part; the surface protection method comprises the following steps:
(1) Uniformly winding transparent adhesive tapes on the surface of a valve core shaft lever of the process;
(2) Selecting a heat-shrinkable sleeve with a proper diameter to be sleeved on the valve core surface to be protected; the diameter of the heat-shrinkable sleeve meets the following conditions: the diameter of the surface protection device is larger than the maximum diameter of the surface to be protected, so that the protection part of the surface protection device can cover the surface to be protected of the valve core after thermal shrinkage, and the minimum diameter of the thermal shrinkage sleeve after thermal shrinkage is smaller than the diameter of the valve core shaft;
(3) Heating the heat-shrinkable sleeve, and cutting off the heat-shrinkable sleeve at the valve core shaft lever step after the sleeve part and the protection part of the surface protection device are shaped; retaining the position of the clamping surface protecting device, namely the clamping part;
(4) Assembling the manufactured surface protection device on a valve core of a product, and checking whether the surface protection device and the valve core can be freely detached;
(5) When the surface protection device is pressed and assembled, the surface protection device is sleeved on the valve core, the valve core is installed in the valve body, and after the fastening piece is assembled, the surface protection device is taken out.
Compared with the prior art, the invention has the remarkable advantages that: (1) The surface protection device provided by the invention is convenient for manufacturing the protection sleeve according to the shape of the part, and can well wrap the part, whether the part is a sphere or a conical surface, so as to realize the protection effect; (2) The surface protection method is simple, convenient and quick, shaft parts with various shapes can be effectively protected, the materials are cheap, and the prepared protective sleeve can be repeatedly used for many times.
Drawings
Fig. 1 is a diagram showing the structure of a valve line sealing pair.
Fig. 2 is a schematic illustration of the installation of a valve core protective sleeve.
Detailed Description
Referring to fig. 2, a surface protection device for shaft parts of complex shape includes a protection part, a sleeve part and a clamping part; the protection part, the sleeve part and the clamping part are integrally arranged and are manufactured by a heat shrinkage sleeve; the protection part is sleeved on the spherical surface of the valve core, the sleeve part is sleeved on the valve core shaft lever, and the clamping part is arranged at the step of the valve core shaft lever; the diameter of the heat-shrinkable sleeve is larger than the maximum diameter of the surface to be protected, and the minimum diameter of the heat-shrinkable sleeve after heat shrinkage is smaller than the diameter of the valve mandrel.
Further, the thickness of the heat-shrinkable sleeve is not more than 0.6mm.
Further, the heat-shrinkable sleeve is a polyvinyl chloride heat-shrinkable sleeve.
Further, the clamping portion is 3mm long or more.
Further, the spherical protection part is provided with a plurality of notches, and the notches are triangular or rectangular.
A surface protection method of complex-shape shaft parts is characterized in that a valve core spherical surface is protected through a heat shrinkage sleeve, and the heat shrinkage sleeve comprises a protection part, a sleeve part and a clamping part; the surface protection method comprises the following steps:
(1) Uniformly winding transparent adhesive tapes on the surface of a valve core shaft lever of the process;
(2) Selecting a heat-shrinkable sleeve with a proper diameter to be sleeved on the valve core surface to be protected; the diameter of the heat-shrinkable sleeve meets the following conditions: the diameter of the surface protection device is larger than the maximum diameter of the surface to be protected, so that the protection part of the surface protection device can cover the surface to be protected of the valve core after thermal shrinkage, and the minimum diameter of the thermal shrinkage sleeve after thermal shrinkage is smaller than the diameter of the valve core shaft;
(3) Heating the heat-shrinkable sleeve, and cutting off the heat-shrinkable sleeve at the valve core shaft lever step after the sleeve part and the protection part of the surface protection device are shaped; retaining the position of the clamping surface protecting device, namely the clamping part;
(4) Assembling the manufactured surface protection device on a valve core of a product, and checking whether the surface protection device and the valve core can be freely detached;
(5) When the surface protection device is pressed and assembled, the surface protection device is sleeved on the valve core, the valve core is installed in the valve body, and after the fastening piece is assembled, the surface protection device is taken out.
After the fastener is assembled, the spherical protective sleeve can be freely detached from the inner hole of the valve body, and the valve wires on two sides of the inner hole of the valve body are not damaged.
Further, a heat baking gun is adopted to heat the heat shrinkage sleeve.
Further, the heat-shrinkable sleeve is a polyvinyl chloride heat-shrinkable sleeve, and the thickness is not more than 0.6mm.
Further, the spherical protection part is provided with a plurality of notches, and the notches are triangular or rectangular.
The invention will be described in detail with reference to examples
Examples
As shown in fig. 2, a surface protection device for shaft parts with complex shapes comprises a protection part 4, a sleeve part 5 and a clamping part 6; the spherical surface protection part, the sleeve part and the clamping part are integrally arranged and are manufactured by a heat shrinkage sleeve; the protection part is sleeved on the valve core spherical surface 1, the sleeve part is sleeved on the valve core shaft lever 2, and the clamping part is arranged at the valve core shaft lever step 3.
In this embodiment, the material of the surface protection device should be a nonmetallic material. The thickness of the protective sleeve is not more than 0.6mm, and the protective sleeve is well attached to the spherical surface of the valve core; if the mold for manufacturing the protective sleeve is manufactured by a conventional processing method, the cost is too high.
The surface protection device is manufactured by using the polyvinyl chloride heat-shrinkable sleeve, and the specific manufacturing method is as follows:
(1) Uniformly winding one or more layers of transparent adhesive tapes with the thickness of 0.1mm-0.3mm on the surface of the valve core shaft rod, and ensuring a gap between the sleeve part of the surface protection device and the valve core shaft rod.
(2) Selecting a heat-shrinkable sleeve with a proper diameter to be sleeved on the valve core surface to be protected; the diameter of the heat-shrinkable sleeve is larger than the maximum diameter of the surface to be protected, so that the protecting part of the surface protecting device can cover the surface to be protected of the valve core after heat shrinkage, and meanwhile, the minimum diameter of the heat-shrinkable sleeve after heat shrinkage is smaller than the diameter of the valve core shaft.
(3) And heating the heat shrinkage sleeve by using a heat drying gun, and cutting off the heat shrinkage sleeve at a valve core shaft lever step after the sleeve part and the protection part of the surface protection device are shaped. But the position for clamping the surface protection device is reserved, the length is more than 3mm, and the manufactured surface protection device is shown in figure 2.
(4) And assembling the manufactured surface protection device on a valve core of a product, and checking whether the surface protection device and the valve core can be freely detached. If the surface protection device is blocked, a proper amount of triangular notch is cut at the opening of the spherical part of the surface protection device so as to reduce friction force.
(5) When in press assembly, the surface protection device is firstly arranged on the valve core, then the valve core is arranged in the valve body, and finally the surface protection device is taken out after the fastening piece is assembled. After the surface protection device is used, the damage of the sealing surface is thoroughly eradicated.
Claims (4)
1. The surface protection method of the complex-shape shaft part is characterized in that the spherical surface of the valve core is protected by a surface protection device, and the surface protection device is manufactured by a heat shrinkage sleeve and comprises a protection part, a sleeve part and a clamping part; the surface protection method comprises the following steps:
(1) Uniformly winding transparent adhesive tapes on the surface of a valve core shaft lever of the process;
(2) Selecting a heat-shrinkable sleeve with a proper diameter to be sleeved on the valve core surface to be protected; the diameter of the heat-shrinkable sleeve meets the following conditions: the diameter of the surface protection device is larger than the maximum diameter of the surface to be protected, so that the protection part of the surface protection device can cover the surface to be protected of the valve core after thermal shrinkage, and the minimum diameter of the thermal shrinkage sleeve after thermal shrinkage is smaller than the diameter of the valve core shaft;
(3) Heating the heat-shrinkable sleeve, and cutting off the heat-shrinkable sleeve at the valve core shaft lever step after the sleeve part and the protection part of the surface protection device are shaped; retaining the position of the clamping surface protecting device, namely the clamping part;
(4) After the manufactured surface protection device is assembled to a valve core of a product, whether the surface protection device and the valve core can be freely disassembled or not is checked;
(5) When the surface protection device is pressed and assembled, the surface protection device is sleeved on the valve core, the valve core is installed in the valve body, and after the fastening piece is assembled, the surface protection device is taken out.
2. The method for protecting the surface of a shaft-like part with a complex shape according to claim 1, wherein the heat shrink sleeve is heated by a heat drying gun.
3. The surface protection method for shaft parts with complex shapes according to claim 1, wherein the heat shrinkage sleeve is a polyvinyl chloride heat shrinkage sleeve with a thickness of not more than 0.6mm.
4. The surface protection method for shaft parts of complex shape according to claim 1, wherein the spherical protection part is provided with a plurality of notches, and the notches are triangular or rectangular in shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810691262.5A CN108747266B (en) | 2018-06-28 | 2018-06-28 | Surface protection device and method for shaft parts with complex shapes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810691262.5A CN108747266B (en) | 2018-06-28 | 2018-06-28 | Surface protection device and method for shaft parts with complex shapes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108747266A CN108747266A (en) | 2018-11-06 |
| CN108747266B true CN108747266B (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810691262.5A Active CN108747266B (en) | 2018-06-28 | 2018-06-28 | Surface protection device and method for shaft parts with complex shapes |
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| Country | Link |
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| CN (1) | CN108747266B (en) |
Citations (12)
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|---|---|---|---|---|
| CN1725395A (en) * | 2004-07-23 | 2006-01-25 | 李英正 | Electronic assembly with protection conduit and manufacturing method thereof |
| DE202008009118U1 (en) * | 2008-07-08 | 2009-02-19 | CCS Technology, Inc., Wilmington | Heat-shrinkable cable sleeve |
| CN102020802A (en) * | 2010-12-03 | 2011-04-20 | 东莞三联热缩材料有限公司 | Magnetic double-wall heat shrinkage casing |
| CN102635757A (en) * | 2012-03-31 | 2012-08-15 | 余姚市河姆渡庆发实业有限公司 | Reinforced antiseptic polyethylene steel-plastic adapter substitute and processing technology |
| CN202549701U (en) * | 2012-04-06 | 2012-11-21 | 江苏大全高压开关有限公司 | Arm touching sleeve pipe |
| CN203431421U (en) * | 2013-06-24 | 2014-02-12 | 常州益涛车辆部件有限公司 | Heat-shrinkable tubing for automotive oil pipe |
| CN104042018A (en) * | 2014-06-13 | 2014-09-17 | 苏州柏德纳科技有限公司 | Protection sleeve |
| CN204809431U (en) * | 2015-06-15 | 2015-11-25 | 沈蓉蓉 | Reducing cable junction protective case |
| CN206313150U (en) * | 2016-11-23 | 2017-07-07 | 广州市科宝绝缘制品有限公司 | A kind of high temperature heat-resistant shrink sleeve |
| CN107640371A (en) * | 2017-11-07 | 2018-01-30 | 惠州富盛绝缘材料有限公司 | A kind of firm means of defence of rotor oversheath pyrocondensation |
| CN108167670A (en) * | 2018-02-11 | 2018-06-15 | 厦门银旭工贸有限公司 | A kind of LED light |
| CN208496235U (en) * | 2018-06-28 | 2019-02-15 | 南京晨光集团有限责任公司 | A kind of face protectors of complicated shape axial workpiece |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100098889A1 (en) * | 2008-10-20 | 2010-04-22 | Dunstone Company, Inc. | Heat-shrinkable sleeve for use on tooling during the process of manufacturing composite parts |
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2018
- 2018-06-28 CN CN201810691262.5A patent/CN108747266B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1725395A (en) * | 2004-07-23 | 2006-01-25 | 李英正 | Electronic assembly with protection conduit and manufacturing method thereof |
| DE202008009118U1 (en) * | 2008-07-08 | 2009-02-19 | CCS Technology, Inc., Wilmington | Heat-shrinkable cable sleeve |
| CN102020802A (en) * | 2010-12-03 | 2011-04-20 | 东莞三联热缩材料有限公司 | Magnetic double-wall heat shrinkage casing |
| CN102635757A (en) * | 2012-03-31 | 2012-08-15 | 余姚市河姆渡庆发实业有限公司 | Reinforced antiseptic polyethylene steel-plastic adapter substitute and processing technology |
| CN202549701U (en) * | 2012-04-06 | 2012-11-21 | 江苏大全高压开关有限公司 | Arm touching sleeve pipe |
| CN203431421U (en) * | 2013-06-24 | 2014-02-12 | 常州益涛车辆部件有限公司 | Heat-shrinkable tubing for automotive oil pipe |
| CN104042018A (en) * | 2014-06-13 | 2014-09-17 | 苏州柏德纳科技有限公司 | Protection sleeve |
| CN204809431U (en) * | 2015-06-15 | 2015-11-25 | 沈蓉蓉 | Reducing cable junction protective case |
| CN206313150U (en) * | 2016-11-23 | 2017-07-07 | 广州市科宝绝缘制品有限公司 | A kind of high temperature heat-resistant shrink sleeve |
| CN107640371A (en) * | 2017-11-07 | 2018-01-30 | 惠州富盛绝缘材料有限公司 | A kind of firm means of defence of rotor oversheath pyrocondensation |
| CN108167670A (en) * | 2018-02-11 | 2018-06-15 | 厦门银旭工贸有限公司 | A kind of LED light |
| CN208496235U (en) * | 2018-06-28 | 2019-02-15 | 南京晨光集团有限责任公司 | A kind of face protectors of complicated shape axial workpiece |
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| Publication number | Publication date |
|---|---|
| CN108747266A (en) | 2018-11-06 |
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