CN111495709A - Coating process for inner wall of connecting sleeve capable of resisting impact torsion and connecting sleeve - Google Patents
Coating process for inner wall of connecting sleeve capable of resisting impact torsion and connecting sleeve Download PDFInfo
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- CN111495709A CN111495709A CN202010323314.0A CN202010323314A CN111495709A CN 111495709 A CN111495709 A CN 111495709A CN 202010323314 A CN202010323314 A CN 202010323314A CN 111495709 A CN111495709 A CN 111495709A
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- connecting sleeve
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- 238000000576 coating method Methods 0.000 title claims abstract description 68
- 239000011248 coating agent Substances 0.000 claims abstract description 52
- 239000000853 adhesive Substances 0.000 claims abstract description 50
- 230000001070 adhesive effect Effects 0.000 claims abstract description 50
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 33
- 239000011651 chromium Substances 0.000 claims abstract description 33
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 33
- 239000010431 corundum Substances 0.000 claims abstract description 33
- 239000004576 sand Substances 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000000227 grinding Methods 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 12
- 238000002791 soaking Methods 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 239000012745 toughening agent Substances 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 5
- 239000003085 diluting agent Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 26
- 239000010959 steel Substances 0.000 abstract description 26
- 239000000084 colloidal system Substances 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 4
- 238000002788 crimping Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 241001465754 Metazoa Species 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000009304 pastoral farming Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/12—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B1/00—Devices for securing together, or preventing relative movement between, constructional elements or machine parts
- F16B1/02—Means for securing elements of mechanisms after operation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention has prepared a kind of adapter sleeve inner wall coating process that can resist the impact torsion, the biggest characteristic of this process lies in processing the multilayer colloid coating thus has increased the thickness of the inner wall coating of adapter sleeve, bake make adhesive coating and chromium corundum sand coating have higher adhesive force in the inner wall of adapter sleeve too twice; the coating on the inner wall of the connecting sleeve obtained by the process has stronger impact tension and torsion resistance, and can well prevent the steel wire rope from loosening and sliding under the action of tension.
Description
Technical Field
The invention belongs to the technical field of coating of the inner wall of a connecting sleeve, and particularly relates to a coating process of the inner wall of the connecting sleeve, which can resist impact torsion.
Background
At present, the rail has become the indispensable important equipment of pasture along with the development of animal husbandry, adopts the rail grazing to have uses manpower sparingly, the grassland rational utilization of being convenient for and improve advantages such as grassland productivity.
In the actual use process of the protective fence in a pasture, the cable of the fence power grid generally uses a steel wire rope, the connection of the steel wire is completed by a connecting sleeve (namely, the connecting sleeve is tightly connected with the steel wire rope in the connecting sleeve by being pressed by a special fastening clamp), at present, the tightness of the used steel wire rope is continuously subjected to the contact of animals and the shaking of different external torsion caused by wind and rain after the smooth surface of the used steel wire rope and the smooth inner wall of the untreated connecting sleeve are mutually hooped, so that the gap of the connection part is enlarged and loosened, the tightness of the connection is loosened, and the steel wire connection is caused to fall off.
The existing connecting sleeve is only coated with a layer of thermosetting resin adhesive and is simply treated, the elongation rate is low, the brittleness is high, cracks are easily generated when the bonding part bears external force, and the cracks are rapidly expanded to cause the cracking of a glue layer, so that the connecting sleeve is not fatigue-resistant and has poor tensile capability. In order to solve the problems, the invention provides a coating process for the inner wall of a connecting sleeve capable of resisting impact torsion and the connecting sleeve.
Disclosure of Invention
The invention provides a process for coating the inner wall of the connecting sleeve, which aims to solve the technical problems and has the advantages of high adhesive force, large-scale production and preparation, simple preparation, impact torque resistance and low possibility of loosening.
In order to solve the technical problem, the invention is realized by the following steps:
step one, completely soaking a connecting sleeve arranged on a special bracket in an adhesive until the inner surface and the outer surface of the connecting sleeve are coated with an adhesive coating;
blowing the adhesive coating of the connecting sleeve into a wall-hanging thin layer through an air pipe, and sending the wall-hanging thin layer into a baking machine for primary baking at the baking temperature of 100-130 ℃ for 40-50 min until the adhesive coating is close to a curing state;
thirdly, arranging the connecting sleeves after the first baking on a special support, soaking the connecting sleeves in the adhesive again, draining off the excessive adhesive on the connecting sleeves in a natural state for 10-20 min, putting the connecting sleeves on the special support into a chromium corundum stirring barrel, and stirring for 45-75 s until the inner and outer surfaces of the connecting sleeves are uniformly stained with the chromium corundum coating;
taking out the connecting sleeve from the stirring barrel, conveying the connecting sleeve into a baking machine, baking for the second time at the baking temperature of 100-130 ℃ for 60-90 min until the adhesive coating and the chromium corundum sand coating are completely cured in the third step;
and fifthly, after the second baking, pouring the connecting sleeve into a grinding machine, adding water to grind the outer surface of the connecting sleeve for 15-25 min until no chromium corundum sand is attached to the outer surface of the connecting sleeve, and taking out the connecting sleeve.
Further, the thickness of the wall hanging thin layer in the second step is 0.2-0.5 mm.
Further, the grinding machine of the step six uses grinding particles with the size larger than the aperture of the line hole.
Furthermore, the thickness of the coating on the inner wall of the connecting sleeve in the fourth step is 0.5-1 mm.
Further, the mesh number of the chromium corundum sand is 100 meshes.
Further, the adhesive comprises the following components in parts by weight: 15-25 parts of epoxy resin, 3-5 parts of toughening agent, 5-15 parts of curing agent and 60-75 parts of diluent.
Another object of the invention is to obtain a connecting sleeve, which is manufactured by the above process.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention adopts the special adhesive, and the epoxy resin contained in the special adhesive has the characteristics of strong adhesion, good mechanical property, stable chemical property and low contractibility; the auxiliary material toughening agent is added, so that the flexibility of the adhesive coating can be further improved; and the auxiliary curing agent is added, so that the strength of the adhesive coating is further improved.
(2) The technology has the greatest characteristics that the thickness of the coating on the inner wall of the connecting sleeve is increased by processing multiple layers of colloid coatings, the colloid coatings and the chromium corundum sand coatings have higher adhesive force on the inner wall of the connecting sleeve by baking for two times, the joint toughness of the inner wall coatings and the steel wire line is increased, the skid resistance of the twisting pulling force generated by shaking is also increased, and the problem of falling of the connecting sleeve special for steel wire connection of the existing fence is solved.
(3) Compared with the prior art, the coating process for the inner wall of the connecting sleeve capable of resisting impact torsion, which is provided by the invention, adopts the chromium corundum sand coating, the strength of the chromium corundum sand coating is far higher than that of common sand, and the chromium corundum sand coating is bonded and solidified on the inner wall by adopting a special adhesive, under the action of the crimping pliers, the connecting sleeve tightly holds two steel wire ropes according to the shapes of the steel wires, the steel wire ropes are gripped by utilizing the self deformation and the point friction force generated by the chromium corundum sand, the performances of impact tension and torsion of the connecting sleeve are greatly improved, the steel wire ropes are prevented from loosening and sliding off under the action of the tension, and the tension.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creating any labor.
Fig. 1 is a schematic perspective view of a connecting sleeve according to the present invention;
fig. 2 is a sectional view of the connecting sleeve of the present invention;
wherein, 1-connecting sleeve, 2-inner wall coating and 3-line hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following detailed description and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
Example 1
In order to solve the technical problem, the invention is realized as follows: the connecting sleeve inner wall coating process capable of resisting impact torsion comprises the following steps:
step one, completely soaking the connecting sleeve 1 arranged on the special bracket in an adhesive until the inner surface and the outer surface of the connecting sleeve 1 are coated with an adhesive coating;
blowing the adhesive coating of the connecting sleeve 1 into a wall-hanging thin layer through an air pipe, and sending the wall-hanging thin layer into a baking machine for primary baking at the baking temperature of 100 ℃ for 50min until the adhesive coating is close to a curing state;
thirdly, arranging the connecting sleeves 1 after the first baking on a special support, soaking the connecting sleeves in the adhesive again, draining off the adhesive in a natural state for 10min, draining off the redundant adhesive on the connecting sleeves, putting the connecting sleeves 1 on the special support into a chromium corundum stirring barrel, and stirring for 45s until the inner and outer surfaces of the connecting sleeves 1 are uniformly stained with the chromium corundum coating;
taking the connecting sleeve 1 out of the stirring barrel, sending the connecting sleeve into a baking machine, baking for the second time at the baking temperature of 100 ℃ for 90min until the adhesive coating and the chromium corundum sand coating are completely cured in the third step;
and step five, pouring the connecting sleeve into a grinding machine after the second baking, adding water to grind the outer surface of the connecting sleeve for 15min until no chromium corundum sand is attached to the outer surface of the connecting sleeve.
Further, the thickness of the wall hanging thin layer in the second step is 0.2 mm.
Furthermore, the size of the grinding particles used by the grinding machine in the step six is larger than the aperture of the wire hole 3, the grinding particles are used for grinding the sand layer on the outer surface of the connecting sleeve 1, and the grinding particles cannot block the wire hole 3 and can well remove the sand layer on the outer surface of the connecting sleeve 1.
Furthermore, the thickness of the coating 2 on the inner wall of the four-connection sleeve 1 is 0.5mm, and the maximum friction force is provided under the condition that the strength of the steel wire rope body is not influenced.
Furthermore, the mesh number of the chromium corundum sand is 100 meshes, and the maximum friction force is provided under the condition that the strength of the steel wire rope body is not influenced.
Further, the adhesive comprises the following components in parts by weight: 15 parts of epoxy resin, 3 parts of toughening agent, 5 parts of curing agent and 60 parts of diluent.
Example 2
The connecting sleeve inner wall coating process capable of resisting impact torsion comprises the following steps:
step one, completely soaking the connecting sleeve 1 arranged on the special bracket in an adhesive until the inner surface and the outer surface of the connecting sleeve 1 are coated with an adhesive coating;
blowing the adhesive coating of the connecting sleeve 1 into a wall-hanging thin layer through an air pipe, and sending the wall-hanging thin layer into a baking machine for primary baking at the baking temperature of 115 ℃ for 45min until the coating is close to a curing state;
thirdly, arranging the connecting sleeves 1 after the first baking on a special support, soaking the connecting sleeves in the adhesive again, draining off the excessive adhesive on the connecting sleeves 1 in a natural state for 15min, putting the connecting sleeves 1 on the special support into a chromium corundum stirring barrel, and stirring for 60s until the inner and outer surfaces of the connecting sleeves 1 are uniformly stained with the chromium corundum coating;
step four, taking the connecting sleeve 1 out of the stirring barrel, sending the connecting sleeve into a baking machine, baking for the second time at the baking temperature of 115 ℃ for 75min until the adhesive coating and the chromium corundum sand coating are completely cured in the step three;
and step five, after the second baking, pouring the connecting sleeve 1 into a grinding machine, adding water to grind the outer surface of the connecting sleeve 1 for 20min until no chromium corundum sand is attached to the outer surface of the connecting sleeve 1, and taking out the connecting sleeve.
Further, the thickness of the wall hanging thin layer in the second step is 0.3 mm.
Furthermore, the size of the grinding particles used by the grinding machine in the step six is larger than the aperture of the line hole, the grinding particles are used for grinding the sand layer on the outer surface of the connecting sleeve 1, the grinding particles cannot block the line hole, and the sand layer on the outer surface of the connecting sleeve 1 can be well removed.
Furthermore, the thickness of the coating 2 on the inner wall of the connecting sleeve 1 is 0.75mm, and the maximum friction force is provided under the condition that the strength of the steel wire rope body is not influenced.
Furthermore, the mesh number of the chromium corundum sand is 100 meshes, and the maximum friction force is provided under the condition that the strength of the steel wire rope body is not influenced.
Further, the adhesive comprises the following components in parts by weight: 20 parts of epoxy resin, 4 parts of toughening agent, 10 parts of curing agent and 67.5 parts of diluent.
Example 3
The connecting sleeve inner wall coating process capable of resisting impact torsion comprises the following steps:
step one, completely soaking the connecting sleeve 1 arranged on the special bracket in an adhesive until the inner surface and the outer surface of the connecting sleeve 1 are coated with an adhesive coating;
blowing the adhesive coating of the connecting sleeve 1 into a wall-hanging thin layer through an air pipe, and sending the wall-hanging thin layer into a baking machine for primary baking at the baking temperature of 130 ℃ for 40min until the coating is close to a curing state;
thirdly, arranging the connecting sleeves 1 after the first baking on a special support, soaking the connecting sleeves in the adhesive again, draining off the adhesive on the connecting sleeves 1 in a natural state for 20min, draining off the redundant adhesive on the connecting sleeves 1, putting the connecting sleeves 1 on the special support into a chromium corundum stirring barrel, and stirring for 75s until the inner surface and the outer surface of the connecting sleeves 1 are uniformly stained with the chromium corundum coating;
step four, taking the connecting sleeve 1 out of the stirring barrel, sending the connecting sleeve into a baking machine, baking for the second time at the baking temperature of 130 ℃ for 60min until the adhesive coating and the chromium corundum sand coating are completely cured in the step three;
and step five, after the second baking, pouring the connecting sleeve 1 into a grinding machine, adding water to grind the outer surface of the connecting sleeve 1 for 20min until no chromium corundum sand is attached to the outer surface of the connecting sleeve 1, and taking out the connecting sleeve.
Further, the thickness of the wall hanging thin layer in the second step is 0.5 mm.
Furthermore, the size of the abrasive particles used by the grinding machine in the step six is larger than the aperture of the wire hole, and the abrasive particles are used for grinding the sand layer on the outer surface of the connecting sleeve 1, so that the abrasive particles cannot be scratched by the sand layer on the outer surface of the connecting sleeve when the connecting sleeve is used by herdsmen to fix a steel wire, and the abrasive particles cannot block the wire hole and can well remove the sand layer on the outer surface of the connecting sleeve 1.
Furthermore, the thickness of the coating 2 on the inner wall of the four-step connecting sleeve 1 is 1mm, and the maximum friction force is provided under the condition that the strength of the steel wire rope body is not influenced.
Furthermore, the mesh number of the chromium corundum sand is 100 meshes, and the maximum friction force is provided under the condition that the strength of the steel wire rope body is not influenced.
Further, the adhesive comprises the following components in parts by weight: 25 parts of epoxy resin, 5 parts of toughening agent, 15 parts of curing agent and 75 parts of diluent.
Example 4
Referring to fig. 1-2, another object of the present invention is to obtain a connecting sleeve, which can be prepared by the processes of example 1, example 2 and example 3.
Furthermore, the cross section of the connecting sleeve 1 is 8-shaped, when a steel wire rope passes through the connecting sleeve with the shape, the connecting sleeve 1 tightly holds the two steel wire ropes under the action of the crimping pliers, the steel wire ropes are tightly bitten by the deformation of the steel wire ropes and the point friction force generated by the chromium corundum sand, and the steel wire ropes are not easy to fall off.
Comparative example
The coating process of the inner wall of the connecting sleeve capable of resisting impact torsion is the same as that of the embodiment 1, the embodiment 2 and the embodiment 3, the chromium corundum sand is replaced by the common sand, and the special adhesive is replaced by the common glue.
The connecting sleeves of the embodiment 1, the embodiment 2, the embodiment 3 and the comparative example are subjected to tension tests, the four connecting sleeves after the crimping pliers compress the steel wire rope are respectively subjected to tension tests by adopting a tension tester, and the test results are as follows:
| examples | Upper limit of bearing force (unit: kilogram) |
| Example 1 | <1000 |
| Example 2 | <1000 |
| Example 3 | <1000 |
| Comparative example | <650 |
As can be seen from the above table, the connecting sleeves of examples 1, 2 and 3 have an upper limit of the tensile force to be applied to the connecting sleeves of examples which is far greater than that of the connecting sleeves of comparative examples.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: modifications of the technical solutions described in the foregoing embodiments are still possible, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A coating process for the inner wall of a connecting sleeve capable of resisting impact torsion is characterized by comprising the following steps:
step one, completely soaking a connecting sleeve arranged on a special bracket in an adhesive until the inner surface and the outer surface of the connecting sleeve are coated with an adhesive coating;
blowing the adhesive coating of the connecting sleeve into a wall-hanging thin layer through an air pipe, and sending the wall-hanging thin layer into a baking machine for primary baking at the baking temperature of 100-130 ℃ for 40-50 min until the coating is close to a curing state;
thirdly, arranging the connecting sleeves after the first baking on a special support, soaking the connecting sleeves in the adhesive again, draining off the excessive adhesive on the connecting sleeves in a natural state for 10-20 min, putting the connecting sleeves on the special support into a chromium corundum stirring barrel, and stirring for 45-75 s until the inner and outer surfaces of the connecting sleeves are uniformly stained with the chromium corundum coating;
taking out the connecting sleeve from the stirring barrel, conveying the connecting sleeve into a baking machine, baking for the second time at the baking temperature of 100-130 ℃ for 60-90 min until the adhesive coating and the chromium corundum sand are completely cured in the third step;
and fifthly, after the second baking, pouring the connecting sleeve into a grinding machine, adding water to grind the outer surface of the connecting sleeve for 15-25 min until no chromium corundum sand is attached to the outer surface of the connecting sleeve, and taking out the connecting sleeve.
2. The process for coating the inner wall of the connecting sleeve capable of resisting impact torsion as claimed in claim 1, wherein the thickness of the wall built-up thin layer in the second step is 0.2-0.5 mm.
3. The process for coating the inner wall of the connecting sleeve capable of resisting impact torsion as claimed in claim 1, wherein the grinding machine in the sixth step uses grinding particles with a size larger than the diameter of the connecting sleeve hole.
4. The process for coating the inner wall of the connecting sleeve capable of resisting impact torsion as claimed in claim 1, wherein the thickness of the coating on the inner wall of the connecting sleeve is 0.5-1 mm.
5. The connecting sleeve inner wall coating process capable of resisting impact torsion as claimed in claim 1, wherein the mesh number of the chromium corundum sand is 100 meshes.
6. The process for coating the inner wall of the connecting sleeve capable of resisting impact torsion according to claim 1, wherein the adhesive comprises the following components in parts by weight: 15-25 parts of epoxy resin, 3-5 parts of toughening agent, 5-15 parts of curing agent and 60-75 parts of diluent.
7. A connecting sleeve, characterized in that it is prepared by the process of claim 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010323314.0A CN111495709A (en) | 2020-04-22 | 2020-04-22 | Coating process for inner wall of connecting sleeve capable of resisting impact torsion and connecting sleeve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010323314.0A CN111495709A (en) | 2020-04-22 | 2020-04-22 | Coating process for inner wall of connecting sleeve capable of resisting impact torsion and connecting sleeve |
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