CN110144577B - Medium carbon alloy steel bolt metal phosphorus-free leather film treatment method - Google Patents
Medium carbon alloy steel bolt metal phosphorus-free leather film treatment method Download PDFInfo
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- CN110144577B CN110144577B CN201910548782.5A CN201910548782A CN110144577B CN 110144577 B CN110144577 B CN 110144577B CN 201910548782 A CN201910548782 A CN 201910548782A CN 110144577 B CN110144577 B CN 110144577B
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
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Abstract
The invention discloses a method for treating a metal phosphorus-free leather film of a medium-carbon alloy steel bolt. The method can reduce the rejection rate of the processed product, further improve the production efficiency, and has the advantages of simple structure and convenient use. The method comprises the following steps: firstly, the method comprises the following steps: acid washing: placing the processed bolt into a pickling tank containing an acid lotion, and stirring and pickling at normal temperature until oxide skin on the surface of the bolt is removed, wherein the surface of the bolt is silvery white; II, secondly: washing for 0.5-1 minute for the first time; thirdly, the method comprises the following steps: washing for 0.5-1 min; fourthly, the method comprises the following steps: washing for 0.5-1 minute for the third time; fifthly: and (3) film treatment: placing the bolts washed by the water for the third time into a membrane treatment pool, treating the bolts by using a phosphorus-free membrane treatment solution at the temperature of 80-90 ℃ for 18-20 minutes, taking out the bolts after the surfaces of the bolts are brownish red, and naturally drying the bolts in a normal-temperature drying environment; sixthly, the method comprises the following steps: lubrication: soaking the dried bolt in LUB-21 lubricant at 75-85 deg.C for 0.5-1 min, and taking out.
Description
Technical Field
The invention relates to the technical field of metal film treatment, in particular to a medium carbon alloy steel bolt metal phosphorus-free film treatment method.
Background
At present, the treatment methods of metal coating film are various, and common methods include electroplating layer, phosphating film, oxidation film, passivation film and the like, and a protective layer is formed on the surface of metal, so that the metal can be conveniently stored and used for a long time.
For example, the Chinese patent publication No. CN108728837A discloses a phosphorus-free coating agent, a phosphorus-free coating treatment method and a product thereof in 2018, 11.02.8.20 g/L, wherein the phosphorus-free coating treatment method comprises the steps of adding 0.5-1 g/L of ammonium metavanadate into 80-120 g/L of the phosphorus-free coating agent by a concentration meter, and washing the surface of the product for 30-60 s at the temperature of 40-45 ℃.
The phosphorus-free leather film treatment method in the prior art is simple, and the rejection rate of the treated product is high.
Disclosure of Invention
The invention aims to solve the defect of high rejection rate of the existing phosphorus-free film treatment method, and provides a medium carbon alloy steel bolt metal phosphorus-free film treatment method which can reduce the rejection rate of treated products, further improve the production efficiency, has a simple structure and is convenient to use.
The technical problem is solved by the following technical scheme:
a method for treating a metal phosphorus-free film of a medium-carbon alloy steel bolt comprises the following steps: firstly, the method comprises the following steps: acid washing: placing the processed bolt into a pickling tank containing an acid lotion, and stirring and pickling at normal temperature until oxide skin on the surface of the bolt is removed, wherein the surface of the bolt is silvery white; II, secondly: primary water washing: placing the pickled bolt into a first water washing tank, washing for 0.5-1 minute at normal temperature in an overflow mode, and removing dust and other suspended matters on the surface of the bolt and more pickling agent in the overflow mode; thirdly, the method comprises the following steps: and (3) secondary water washing: placing the bolts subjected to primary washing into a second washing tank, washing for 0.5-1 minute at normal temperature in a soaking mode, and removing residual pickling agent and easily-peeled oxide skin on the bolts in the soaking mode; fourthly, the method comprises the following steps: and (3) washing for the third time: placing the bolt after the secondary washing into a third washing pool, washing for 0.5-1 minute at normal temperature in a washing mode, and cleaning oxide skin which is difficult to fall off on the surface of the bolt in a washing mode for the third time, wherein the surface of the bolt is silvery white; fifthly: and (3) film treatment: placing the bolts washed by the water for the third time into a membrane treatment pool, treating the bolts by using a phosphorus-free membrane treatment solution at the temperature of 80-90 ℃ for 18-20 minutes, taking out the bolts after the surfaces of the bolts are brownish red, and naturally drying the bolts in a normal-temperature drying environment; sixthly, the method comprises the following steps: lubrication: and soaking the dried bolt into LUB-21 lubricant at 75-85 ℃ for 0.5-1 min, taking out, soaking the lubricant, isolating the contact of oxygen in the air, effectively and completely protecting the bolt and prolonging the service life of the bolt.
Preferably, in the step one, the pickling agent is an aqueous solution of industrial hydrochloric acid, and the volume ratio of the industrial hydrochloric acid to the water is 1: 1. 1:1, so that oxide skins on the surfaces of the bolts can be effectively removed.
Preferably, the concentration of the phosphorus-free film treatment liquid in the fifth step is 10% to 15%. The phosphorus-free leather membrane treatment liquid with the concentration of 10% -15% can well make the surface of the bolt appear brownish red, and is convenient to treat fully.
Preferably, the LUB-21 lubricant in step six has a free acidity value of 3.5pt or less. The weakly acidic lubricant can effectively and completely protect the bolt and prolong the service life of the bolt.
As preferred, the upper end is equipped with the workstation that is used for puting in the pending bolt in the involucra treatment tank, and fixed mounting has the support frame on the involucra treatment tank that is located the workstation top, the support frame mid-mounting has automatically controlled rolling box, automatically controlled rolling box left and right sides is equipped with the fixed pulley that is symmetrical arrangement, is located the fixed pulley below and is equipped with the thing box of putting that is connected with automatically controlled rolling box, put the thing box bottom and install the stirring subassembly, the involucra treatment tank lower extreme is equipped with the steam conduit who is used for the heating of involucra treatment fluid.
Preferably, the variable frequency motor with the transmission is installed at the upper end of the electric control winding box, the output shaft of the transmission is connected to the lead screw in a driving mode, the lead screw is connected to the lifting block in a driving mode, the lifting block is fixedly connected to the top end of the double-sided rack, the left end and the right end of the double-sided rack are respectively connected to the gear disc I and the gear disc II in a meshed mode, and the gear disc I and the gear disc II are both movably connected to the electric control winding box.
Preferably, gear wheel I and gear wheel II all include the bracing piece of fixed mounting on automatically controlled rolling box, be equipped with on the bracing piece rather than rotate the connecting axle of being connected, install rather than fixed connection's gear and rolling dish on the connecting axle.
Preferably, install filter screen and seal groove on putting thing box lateral wall and the bottom respectively, the stirring subassembly is installed in the seal groove.
As preferred, stir the subassembly and include a plurality of irregular shape gyro wheels, the gyro wheel passes through fixed axle drive connection on rather than the driven gear who joins in marriage mutually, the driven gear meshing is connected on the external tooth face in double-sided gear area, the internal tooth face meshing in double-sided gear area is connected on drive gear, and drive gear's the left and right sides all is equipped with and is used for the spacing leading wheel in double-sided gear area, drive gear drive connection is on step motor.
Preferably, the left end and the right end of the steam pipeline are respectively provided with a steam inlet and a steam outlet, a temperature control valve is arranged at the steam inlet, a temperature sensor matched with the temperature control valve is arranged on the temperature control valve, the temperature sensor is arranged in the membrane treatment pool, and a plurality of heat exchangers for exchanging heat of the membrane treatment liquid are arranged in the steam pipeline.
The invention can achieve the following effects:
the invention provides a method for treating a medium-carbon alloy steel bolt metal phosphorus-free leather film, which can reduce the rejection rate of treated products, further improve the production efficiency, and has the advantages of simple structure and convenient use.
Drawings
Fig. 1 is a flowchart of an overall structure according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a film treatment tank according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an electrically controlled rolling box in an embodiment of the invention.
Fig. 4 is a partially enlarged view of fig. 3.
Fig. 5 is a schematic structural view of the storage box according to the embodiment of the present invention.
FIG. 6 is a schematic diagram of a construction of an agitating assembly according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a steam pipeline in an embodiment of the present invention.
In the figure: the device comprises a pickling tank 1, a first washing tank 2, a second washing tank 3, a third washing tank 4, a membrane treatment tank 5, a workbench 51, a support frame 52, a fixed pulley 53, an electronic control winding box 54, a storage box 55, a stirring assembly 56, a steam pipeline 57, a variable frequency motor 541, a transmission 542, a lead screw 543, a lifting block 544, a double-sided rack 545, a gear disc II546, a gear disc I547, a support rod 5401, a gear 5402, a winding disc 5403, a connecting shaft 5404, a filter screen 551, a sealing groove 552, a roller 561, a fixed shaft 562, a driven gear 563, a double-sided gear belt 564, a limiting guide wheel 565, a driving gear 566, a stepping motor 567, a steam inlet 571, a temperature control valve 572, a temperature sensor 573, a heat exchanger 574 and a steam outlet 575.
Detailed Description
The invention is further described with reference to the following figures and examples.
In the embodiment, a method for treating a metal phosphorus-free coating of a medium-carbon alloy steel bolt is shown in figure 1, and comprises the following steps: firstly, the method comprises the following steps: acid washing: placing the processed bolt into a pickling tank 1 containing an acid lotion, and stirring and pickling at normal temperature until oxide skin on the surface of the bolt is removed, wherein the surface of the bolt is silvery white; II, secondly: primary water washing: placing the pickled bolt into a first washing pool 2, and washing for 0.5-1 minute at normal temperature in an overflow mode; thirdly, the method comprises the following steps: and (3) secondary water washing: placing the bolt subjected to primary washing into a second washing pool 3, and washing for 0.5-1 minute at normal temperature in a soaking mode; fourthly, the method comprises the following steps: and (3) washing for the third time: placing the bolt subjected to secondary washing into a third washing tank 4, and washing for 0.5-1 minute at normal temperature in a washing mode; fifthly: and (3) film treatment: placing the bolts washed by the water for the third time into a membrane treatment pool 5, treating the bolts by using a phosphorus-free membrane treatment solution at the temperature of 80-90 ℃ for 18-20 minutes, taking out the bolts after the surfaces of the bolts are brownish red, and naturally drying the bolts in a normal-temperature drying environment; sixthly, the method comprises the following steps: lubrication: soaking the dried bolt in LUB-21 lubricant at 75-85 deg.C for 0.5-1 min, and taking out.
Referring to fig. 2, a workbench 51 for putting in bolts to be processed is arranged at the upper end in the membrane treatment tank 5, a support frame 52 is fixedly installed on the membrane treatment tank 5 above the workbench 51, an electric control rolling box 54 is installed in the middle of the support frame 52, fixed pulleys 53 symmetrically arranged are arranged on the left side and the right side of the electric control rolling box 54, a storage box 55 connected with the electric control rolling box 54 is arranged below the fixed pulleys 53, a stirring assembly 56 is installed at the bottom of the storage box 55, and a steam pipeline 57 for heating a membrane treatment liquid is arranged at the lower end of the membrane treatment tank 5.
Referring to fig. 3, the upper end of the electrically controlled reeling box 54 is provided with a variable frequency motor 541 with a transmission 542, an output shaft of the transmission 542 is drivingly connected to a lead screw 543, the lead screw 543 is drivingly connected to an elevating block 544, the elevating block 544 is fixedly connected to the top end of a double-sided rack 545, the left end and the right end of the double-sided rack 545 are respectively engaged and connected to a gear disc I547 and a gear disc II546, and the gear disc I547 and the gear disc II546 are both movably connected to the electrically controlled reeling box 54.
Referring to fig. 4, each of the gear plate I547 and the gear plate II546 includes a support rod 5401 fixedly mounted on the electronic control winding box 54, a connecting shaft 5404 rotatably connected to the support rod 5401 is provided on the support rod 5401, and a gear 5402 and a winding plate 5403 fixedly connected to the connecting shaft 5404 are provided on the connecting shaft 5404.
Referring to fig. 5, the storage box 55 has a filter screen 551 and a sealing groove 552 formed on the sidewall and the bottom thereof, respectively, and the stirring assembly 56 is disposed in the sealing groove 552.
Referring to fig. 6, the stirring assembly 56 includes a plurality of irregular rollers 561, the rollers 561 are drivingly connected to a driven gear 563 coupled thereto through a fixed shaft 562, the driven gear 563 is drivingly connected to an outer tooth surface of a double-sided gear belt 564, an inner tooth surface of the double-sided gear belt 564 is drivingly connected to a driving gear 566, both left and right sides of the driving gear 566 are provided with limit guide wheels 565 for limiting the double-sided gear belt 564, and the driving gear 566 is drivingly connected to a stepping motor 567.
Referring to fig. 7, the left end and the right end of the steam pipeline 57 are respectively provided with a steam inlet 571 and a steam outlet 575, a temperature control valve 572 is installed at the steam inlet 571, the temperature control valve 572 is provided with a temperature sensor 573 matched with the temperature control valve, the temperature sensor 573 is installed in the film treatment tank 5, and a plurality of heat exchangers 574 for exchanging heat of the film treatment liquid are installed in the steam pipeline 57.
In the embodiment, the pickling tank 1 is adopted to remove silvery white rust on the surface of the bolt to be treated, the bolt to be treated sequentially passes through the primary washing tank 2, the secondary washing tank 3 and the tertiary washing tank 4, the pickling agent on the surface of the bolt to be treated and the fallen rust are cleaned in the three washing steps, the bolt to be treated is placed into the storage box 55 on the leather membrane treatment tank 5 and is placed into the leather membrane treatment tank 5 through the electric control rolling box 54, the phosphorus-free leather membrane treatment liquid is heated through the heat exchanger 574 of the steam pipeline 57, the temperature of the phosphorus-free leather membrane treatment liquid is controlled to be 85 ℃ through the matching of the temperature control valve 572 and the temperature sensor 573, the contact area between the bolt to be treated and the phosphorus-free leather membrane treatment liquid is increased through the stirring of the stirring assembly 56 and the bolt to be treated in the storage box 55, the treatment effect is more sufficient, the success rate of the leather membrane treatment is further increased, the surface of the bolt to be treated is brownish red after 18 minutes Fishing out the film treatment liquid, placing the film treatment liquid in a normal-temperature drying environment for natural drying, soaking the film treatment liquid into LUB-21 lubricant after drying, soaking the film treatment liquid for 1 minute at the temperature of 80 ℃, and fishing out the film treatment liquid to obtain a finished product.
The invention provides a method for treating a medium-carbon alloy steel bolt metal phosphorus-free film, which can reduce the rejection rate of treated products so as to improve the production efficiency and has the advantages of simple structure, convenience in use and high reliability.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the implementation is not limited to the above-described embodiments, and those skilled in the art can make various changes or modifications within the scope of the appended claims.
Claims (1)
1. A method for treating a metal phosphorus-free film of a medium-carbon alloy steel bolt is characterized by comprising the following steps: firstly, the method comprises the following steps: acid washing: putting the processed bolt into a pickling tank (1) containing an acid washing agent, stirring and pickling at normal temperature until oxide skin on the surface of the bolt is removed, wherein the surface of the bolt is silvery white, the pickling agent is an aqueous solution of industrial hydrochloric acid, and the volume ratio of the industrial hydrochloric acid to water is 1: 1; II, secondly: primary water washing: placing the pickled bolt into a first water washing pool (2), and washing for 0.5-1 minute at normal temperature in an overflow mode; thirdly, the method comprises the following steps: and (3) secondary water washing: placing the bolt subjected to primary washing into a second washing pool (3), and washing for 0.5-1 minute at normal temperature in a soaking mode; fourthly, the method comprises the following steps: and (3) washing for the third time: placing the bolt subjected to secondary washing into a third washing tank (4), and washing for 0.5-1 minute at normal temperature in a washing mode; fifthly: and (3) film treatment: placing the bolts washed by the water for three times into a leather membrane treatment pool (5), treating the bolts by using a phosphorus-free leather membrane treatment solution for 18 to 20 minutes at the temperature of between 80 and 90 ℃, wherein the concentration of the phosphorus-free leather membrane treatment solution is between 10 and 15 percent, taking out the bolts after the surfaces of the bolts are brownish red, and naturally drying the bolts in a normal-temperature drying environment; a workbench (51) for putting in bolts to be treated is arranged at the upper end in the leather membrane treatment pool (5), a support frame (52) is fixedly installed on the leather membrane treatment pool (5) above the workbench (51), an electric control rolling box (54) is installed in the middle of the support frame (52), fixed pulleys (53) which are symmetrically arranged are arranged on the left side and the right side of the electric control rolling box (54), an object placing box (55) connected with the electric control rolling box (54) is arranged below the fixed pulleys (53), a stirring assembly (56) is installed at the bottom of the object placing box (55), and a steam pipeline (57) for heating leather membrane treatment liquid is arranged at the lower end of the leather membrane treatment pool (5); the stirring assembly (56) comprises a plurality of irregular rollers (561), the rollers (561) are in driving connection with driven gears (563) matched with the rollers through fixing shafts (562), the driven gears (563) are in meshed connection with outer tooth surfaces of double-sided gear belts (564), inner tooth surfaces of the double-sided gear belts (564) are in meshed connection with driving gears (566), limiting guide wheels (565) used for limiting the double-sided gear belts (564) are arranged on the left side and the right side of the driving gears (566), and the driving gears (566) are in driving connection with stepping motors (567); the left end and the right end of the steam pipeline (57) are respectively provided with a steam inlet (571) and a steam outlet (575), the steam inlet (571) is provided with a temperature control valve (572), the temperature control valve (572) is provided with a temperature sensor (573) matched and connected with the temperature control valve, the temperature sensor (573) is arranged in the film treatment pool (5), and the steam pipeline (57) is internally provided with a plurality of heat exchangers (574) for heat exchange of film treatment liquid; the upper end of the electric control winding box (54) is provided with a variable frequency motor (541) with a speed changer (542), an output shaft of the speed changer (542) is connected to a screw rod (543) in a driving way, the screw rod (543) is connected to a lifting block (544) in a driving way, the lifting block (544) is fixedly connected to the top end of a double-sided rack (545), the left end and the right end of the double-sided rack (545) are respectively connected to a gear disc I (547) and a gear disc II (546) in a meshing way, and the gear disc I (547) and the gear disc II (546) are both movably connected to the electric control winding box (54); the gear disc I (547) and the gear disc II (546) both comprise a support rod (5401) fixedly mounted on the electric control winding box (54), a connecting shaft (5404) in rotary connection with the support rod (5401) is arranged on the support rod (5401), and a gear (5402) and a winding disc (5403) which are fixedly connected with the connecting shaft (5404) are mounted on the connecting shaft (5404); a filter screen (551) and a sealing groove (552) are respectively arranged on the side wall and the bottom end of the storage box (55), and the stirring assembly (56) is arranged in the sealing groove (552); sixthly, the method comprises the following steps: lubrication: immersing the dried bolt into LUB-21 lubricant, wherein the free acidity value of the LUB-21 lubricant is less than or equal to 3.5pt, soaking at 75-85 deg.C for 0.5-1 min, and taking out.
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| CN201910548782.5A CN110144577B (en) | 2019-06-24 | 2019-06-24 | Medium carbon alloy steel bolt metal phosphorus-free leather film treatment method |
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| CN111575723A (en) * | 2020-06-03 | 2020-08-25 | 合肥力和机械有限公司 | Cold pickling device for steel ball production and use method thereof |
| CN111575696A (en) * | 2020-06-20 | 2020-08-25 | 烟台博昌汽车标准件有限公司 | Surface treatment equipment and process for phosphatized bolt |
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| JP3137535B2 (en) * | 1994-06-27 | 2001-02-26 | 日本パーカライジング株式会社 | Zinc-containing metal-coated steel sheet composite excellent in coatability and method for producing the same |
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| CN102632102A (en) * | 2012-04-16 | 2012-08-15 | 常熟市无缝钢管有限公司 | Machining method of abnormal tubular product for lift control switch |
| DE102014201460A1 (en) * | 2013-01-28 | 2014-07-31 | Ford Global Technologies, Llc | METHOD FOR PRE-TREATING ALUMINUM ASSEMBLIES FOR IMPROVED ADHESIVE COMPOSITIONS AND IMPROVED CORROSION RESISTANCE |
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