阅读说明：本技术 一种电梯导轨工件的表面处理方法 (Surface treatment method for elevator guide rail workpiece ) 是由 庄卫东 黄涤 张凯 刘香松 于 2021-08-23 设计创作，主要内容包括：本发明属于电梯导轨技术领域,具体涉及一种电梯导轨工件的表面处理方法。其技术要点如下：在电梯导轨工件的表面涂覆防锈油,后贴膜；其中,所述防锈油中稀释剂的用量根据防锈油的运动粘度确定,所述防锈油的运动粘度的计算公式如下：,其中是防锈油的运动粘度,单位是厘斯,即10～(-6)m～(2)/s；S是电梯导轨工件的表面粗糙度,单位是μm；H为防锈油膜层厚度,单位是μm,V是防锈油的涂覆速度,单位是m/s。本发明中,利用表面粗糙度、涂覆速度以及需要的防锈油膜层的厚度对防锈油的运动粘度进行计算和配制,配制出的防锈油不会产生溢流的现象,同时能够在电梯导轨工件表面形成均匀致密的膜层,有效提高防锈油对电梯导轨工件的保护力度。(The invention belongs to the technical field of elevator guide rails, and particularly relates to a surface treatment method for an elevator guide rail workpiece. The technical points are as follows: coating anti-rust oil on the surface of the elevator guide rail workpiece, and then pasting a film; wherein the using amount of the diluent in the anti-rust oil is determined according to the kinematic viscosity of the anti-rust oil, and the calculation formula of the kinematic viscosity of the anti-rust oil is as follows: wherein is the kinematic viscosity of the rust preventive oil in centistokes, i.e., 10 ‑6 m 2 S; s is the surface roughness of the elevator guide rail workpiece, and the unit is mum; h is the thickness of the rust preventive oil film layer in μm, and V is the coating speed of the rust preventive oil in m/s. According to the invention, the kinematic viscosity of the anti-rust oil is calculated and prepared by utilizing the surface roughness, the coating speed and the required thickness of the anti-rust oil film layer, so that the prepared anti-rust oil cannot overflow, and meanwhile, a uniform and compact film layer can be formed on the surface of the elevator guide rail workpiece, thereby effectively improving the protection strength of the anti-rust oil on the elevator guide rail workpiece.)

1. A surface treatment method of an elevator guide rail workpiece is characterized in that rust preventive oil is coated on the surface of the elevator guide rail workpiece, and then a film is pasted; the using amount of the diluent in the anti-rust oil is determined according to the kinematic viscosity of the anti-rust oil, and the calculation formula of the kinematic viscosity of the anti-rust oil is as follows:

wherein is the kinematic viscosity of the rust preventive oil in centistokes, i.e., 10^-6m²S; s is the surface roughness of the elevator guide rail workpiece, and the unit is mum; h is the thickness of the rust preventive oil film layer in μm, V is the coating speed of the rust preventive oil in m/s, and a and b are coefficients, not calculated in units.

2. The surface treatment method for the elevator guide rail workpiece according to claim 1, wherein a is a value of a thermal expansion coefficient of the elevator guide rail workpiece at 20 ℃.

3. The method for surface treatment of an elevator guide rail workpiece according to claim 1 or 2, wherein the method is characterized in thatWherein T is₁Is the temperature, T, of the elevator guide rail₂The temperature of the rust preventive oil.

4. The method of claim 3, wherein the diluent is used in an amount ofWhereinIs the kinematic viscosity of the diluent and is,is the kinematic viscosity, W, of the other components of the rust preventive oil except the diluent_TThe weight portion of the components except the diluent is the total weight portion of the components of the rust preventive oil, and W is the weight portion of the diluent.

5. The surface treatment method of the elevator guide rail workpiece according to claim 3, characterized by comprising the following specific steps:

s1, cleaning and drying the surface of the elevator guide rail workpiece;

s2, measuring the surface roughness S of the elevator guide rail workpiece;

s3, according to the formulaCalculating kinematic viscosity of antirust oilAnd calculating and determining the dosage of the diluent in the anti-rust oil;

s4, preparing antirust oil;

s5, placing the elevator guide rail workpiece on an oiling device, and uniformly covering a layer of anti-rust oil film on the surface of the elevator guide rail workpiece;

and S6, conveying the elevator guide rail workpiece into a film sticking device to finish film sticking.

6. The surface treatment method of the elevator guide rail workpiece according to claim 5, wherein the rust preventive oil comprises the following components in parts by mass: 100-120 parts of base oil, 10-20 parts of carboxyl modified chitosan, 10-15 parts of rosin, 5-8 parts of fullerene, 5-8 parts of low-density polyethylene wax, 5-9 parts of sodium dodecyl benzene sulfonate, 1-2 parts of cocamidopropyl betaine, 10-15 parts of silicone oil and W parts of diluent.

7. The surface treatment method of an elevator guide rail workpiece according to claim 6, wherein the rust preventive oil in step S3 is prepared by the following method:

a1, controlling the temperature of a reaction kettle at 50-60 ℃, adding base oil, carboxyl modified chitosan, fullerene, silicone oil and low-density polyethylene wax into the reaction kettle, stirring for reaction, and placing the materials into an ultrasonic instrument for ultrasonic dispersion for 1-2 hours;

a2, adding sodium dodecyl benzene sulfonate and cocamidopropyl betaine into the step A1, heating to 70-80 ℃, and stirring for 15min to obtain a mixed solution, wherein the mass portion of the mixed solution is W_TAnd testing the kinematic viscosity of the obtained mixed solution;

a3, according to the kinematic viscosity of the selected diluent and the kinematic viscosity of the rust preventive oil and the viscosity of the mixed solution according to the formulaCalculating to obtain W parts of the added diluent;

a4, adding W parts of diluent into the mixed solution, performing ultrasonic dispersion for 30-50 min, and cooling to the temperature T₂Obtaining the rust preventive oil.

8. The surface treatment method of an elevator guide rail workpiece according to claim 6, wherein the diluent is petroleum ether or kerosene.

9. The surface treatment method of an elevator guide rail workpiece according to claim 6, characterized in that the silicone oil is carboxylated silicone oil.

10. The method for treating the surface of the elevator guide rail workpiece according to claim 6, wherein the low-density polyethylene wax has an average molecular weight of 3000 to 5000.

Technical Field

The invention belongs to the technical field of elevator guide rails, and particularly relates to a surface treatment method for an elevator guide rail workpiece.

Background

At present, vertically-lifting elevators and escalators are the mainstream varieties in the elevator industry, wherein the vertically-lifting elevators account for about 80% of the total amount of the existing elevators, so that the vertically-lifting elevators become an important product which is closely related to the life of people, and the quality condition of the vertically-lifting elevators is also closely related to the lives and properties of people. In which the elevator guide rails, as an important part of the quality control of a vertical lift elevator, will directly affect the safety and comfort of the elevator. The elevator guide rails are two or more rows of vertical or inclined rigid rails arranged in an elevator shaft or between floors, so that the elevator car and the counterweight can move up and down along the elevator guide rails, and the quality of the elevator guide rails is directly related to the safety and the running quality of the elevator. After the elevator guide rail workpiece is manufactured, a layer of anti-rust oil needs to be coated on the surface of the elevator guide rail workpiece, and a protective film needs to be attached to the surface of the elevator guide rail workpiece, so that the elevator guide rail is prevented from being rusted and scratched in the transportation and use processes.

At present, the procedure of coating the anti-rust oil is to place an elevator guide rail workpiece on a guide rail, and drive a coating roller to move to coat the surface of the elevator guide rail workpiece under the motion of the guide rail, but due to the different kinematic viscosity of the anti-rust oil, the phenomena of uneven coating of the anti-rust oil, flow casting of the anti-rust oil and the like can be caused, so that the elevator guide rail workpiece can be damaged, a protective film can be easily peeled off from the elevator guide rail workpiece, the elevator guide rail cannot be protected by the film and the anti-rust oil in the transportation process, and the phenomena of scratching and rusting are caused.

In view of the defects in the existing anti-rust oil, the inventor develops a surface treatment method for an elevator guide rail workpiece based on years of design and manufacture of the products, abundant practical experience and professional knowledge, proficient and full application of a chemical mechanism, and continuous research and innovation in practice.

Disclosure of Invention

The invention aims to provide a surface treatment method of an elevator guide rail workpiece, which solves the technical problems of uneven coating, tape casting and the like of an antirust oil film layer.

The invention is also suitable for the commercially purchased antirust oil before use according to the requirements of workpieces or preparation procedures, and solves the problems of roller sticking, tape casting, oil spilling and the like of the antirust oil generated when the kinematic viscosity of the antirust oil is inconsistent with the process requirements.

The technical purpose of the invention is realized by the following technical scheme:

the invention provides a surface treatment method of an elevator guide rail workpiece, which comprises the steps of coating anti-rust oil on the surface of the elevator guide rail workpiece and then pasting a film; wherein the dosage of the diluent in the rust preventive oil is determined according to the kinematic viscosity of the rust preventive oil, and the calculation formula of the kinematic viscosity of the rust preventive oil is as follows:

whereinIs the kinematic viscosity of the rust preventive oil, and the unit is 10^-6m²S is the surface roughness of the elevator guide rail workpiece, and the unit is mum; h is the thickness of the rust preventive oil film layer in μm, V is the coating speed of the rust preventive oil in m/s, and a and b are coefficients, not calculated in units. The kinematic viscosity of the rust preventive oil determines the thickness of the coating film layer under the same coating speed and the same surface roughness; if the kinematic viscosity of the rust preventive oil is too high, the coating is not uniform, a compact film layer cannot be formed, the bonding force between the rust preventive oil and a subsequent protective film is reduced, the protective film is easy to peel off, and if the kinematic viscosity of the rust preventive oil is too low, the rust preventive oil can be cast, and a uniform and compact film layer cannot be formed; thus, different coating speeds and workpiece surface roughness are suitable for different applicationsA kinematic viscosity rust preventive oil; the thicknesses of the film layers formed by the anti-rust oil with different kinematic viscosities are different, and the anti-rust oil film layers with different thicknesses are required to be coated on the elevator guide rail workpieces with different surface roughnesses. The reason why the kinematic viscosity is adopted but not adopted in the present invention is that the application of the rust preventive oil is a dynamic process, and therefore the kinematic viscosity is more accurate.

The kinematic viscosity referred to in the present invention is the kinematic viscosity of a liquid at 40 ℃ and is the kinematic viscosity of a fluid in mm when the fluid flows under gravity²The resistance in the/s meter was measured using ASTM D445-06.

The surface roughness referred to in the invention refers to the small pitch and the unevenness of the tiny peaks and valleys of the machined surface, and is measured according to GB/T131-.

The thermal expansion coefficient of the elevator guide rail workpiece related to the invention is measured according to the method provided by GBT4339-2008, and only the numerical value of the thermal expansion coefficient of the elevator guide rail workpiece at 20 ℃ is taken in the invention, and the unit is not calculated.

Further, a is the value of the thermal expansion coefficient of the elevator guide rail workpiece at 20 ℃. The elevator guide rail workpieces made of different materials have different thermal expansion coefficients, and the thermal expansion coefficient of the surface of the workpiece has the same influence on the spreading of the anti-rust oil and the surface roughness of the workpiece, so that the surface roughness is modified by adopting the thermal expansion coefficient, and the calculation accuracy of the motion viscosity of the anti-rust oil can be improved.

Further, in the above-mentioned case,wherein T is₁Is the temperature of the guide rails of the elevator，T₂The temperature of the rust preventive oil. The temperature difference between the elevator guide rail and the anti-rust oil can also affect the spreading of the anti-rust oil, so that the calculation accuracy of the kinematic viscosity of the anti-rust oil can be improved by modifying the thickness of the anti-rust oil film layer by adopting the temperature difference between the elevator guide rail and the anti-rust oil, and T₂Can be obtained by directly heating or cooling when preparing the rust preventive oil.

Further, the diluent is used in an amount ofWhereinIs the kinematic viscosity of the diluent and is,is the kinematic viscosity, W, of the other components of the rust preventive oil except the diluent_TThe weight portion of the components except the diluent is the total weight portion of the components of the rust preventive oil, and W is the weight portion of the diluent. Since the kinematic viscosity of the diluent is low, the kinematic viscosity of the rust preventive oil can be reduced by the amount of the diluent added.

Further, the surface treatment method provided by the invention specifically comprises the following specific steps:

s1, cleaning and drying the surface of the elevator guide rail workpiece;

s2, measuring the surface roughness S of the elevator guide rail workpiece;

s3, according to the formulaCalculating kinematic viscosity of antirust oilCalculating the dosage of the diluent in the anti-rust oil;

s4, preparing antirust oil;

s5, placing the elevator guide rail workpiece on an oiling device, and uniformly covering a layer of anti-rust oil film on the surface of the elevator guide rail workpiece;

and S6, conveying the elevator guide rail workpiece into a film sticking device to finish film sticking.

Further, the anti-rust oil comprises the following components in parts by weight: 100-120 parts of base oil, 10-20 parts of carboxyl modified chitosan, 10-15 parts of rosin, 5-8 parts of fullerene, 5-8 parts of low-density polyethylene wax, 5-9 parts of sodium dodecyl benzene sulfonate, 1-2 parts of cocamidopropyl betaine, 10-15 parts of silicone oil and W parts of diluent. The carboxyl modified chitosan in the anti-rust oil provided by the invention can improve the film forming property of the anti-rust oil, and the fullerene has reducibility, so that the elevator guide rail workpiece can be prevented from being oxidized; sodium dodecyl benzene sulfonate and cocamidopropenyl betaine can perform amidation reaction with other components in the invention, and the obtained product has stronger adhesive force with a protective film attached in the subsequent process, thereby avoiding the peeling of the protective film.

Further, the base oil is preferably palm oil or rapeseed oil.

Further, the preparation method of the rust preventive oil in the step S3 is as follows:

a1, controlling the temperature of a reaction kettle at 50-60 ℃, adding base oil, carboxyl modified chitosan, fullerene, silicone oil and low-density polyethylene wax into the reaction kettle, stirring for reaction, and placing the materials into an ultrasonic instrument for ultrasonic dispersion for 1-2 hours;

a2, adding sodium dodecyl benzene sulfonate and cocamidopropyl betaine into the step A1, heating to 70-80 ℃, and stirring for 15min to obtain a mixed solution, wherein the mass portion of the mixed solution is W_TAnd testing the kinematic viscosity of the obtained mixed solution；

A3, kinematic viscosity according to the diluent chosenAnd kinematic viscosity of rust preventive oilAnd the viscosity of the mixed solution according to the formulaCalculating to obtain W parts of the added diluent;

a4, adding W parts of diluent into the mixed solution, performing ultrasonic dispersion for 30-50 min, and cooling to the temperature T₂Obtaining the rust preventive oil.

Further, the diluent is petroleum ether or kerosene.

Further, the silicone oil is carboxylated silicone oil. The silicone oil not only has film forming property and lubricating property, but also can adjust the kinematic viscosity of the antirust oil.

Further, the average molecular weight of the low-density polyethylene wax is 3000-5000. The low-density polyethylene wax is added to improve the low-temperature performance of the anti-rust oil, and the film forming property of the anti-rust oil on the surface of the elevator guide rail workpiece is still ensured under the condition of low-temperature transportation.

In conclusion, the invention has the following beneficial effects:

according to the invention, the kinematic viscosity of the anti-rust oil is calculated and prepared by utilizing the surface roughness, the coating speed and the required thickness of the anti-rust oil film layer, so that the prepared anti-rust oil cannot overflow, and meanwhile, a uniform and compact film layer can be formed on the surface of the elevator guide rail workpiece, thereby effectively improving the protection strength of the anti-rust oil on the elevator guide rail workpiece.

Detailed Description

To further illustrate the technical means and effects adopted by the invention to achieve the preset invention, the detailed description of the surface treatment method of the elevator guide rail workpiece according to the invention is provided as follows.

The kinematic viscosity referred to in this embodiment is the kinematic viscosity of a liquid at 40 ℃ and is in mm when the fluid flows under gravity²The resistance in the/s meter was measured using ASTM D445-06.

The surface roughness referred to in the present embodiment refers to the roughness of the small pitch and the minute peak and valley of the machined surface, and is measured according to GB/T131-.

The thermal expansion coefficient of the elevator guide rail workpiece related to the embodiment is measured according to the method provided by GBT4339-2008, and in the embodiment, only the value of the thermal expansion coefficient of the elevator guide rail workpiece at 20 ℃ is taken, and the unit is not calculated.

Example 1: surface treatment method for elevator guide rail workpiece

In the embodiment, the coating speed of the anti-rust oil is set to be 0.8m/s, the thickness of the anti-rust oil film layer is set to be 15 microns, the temperatures of the anti-rust oil and the elevator guide rail workpiece are both 24 ℃ at normal temperature, and the thermal expansion coefficient of the elevator guide rail workpiece after being cleaned and dried is 11.6.

The surface treatment method of the elevator guide rail workpiece in the embodiment specifically comprises the following operation steps:

s1, cleaning and drying the surface of the elevator guide rail workpiece;

s2, measuring the surface roughness of the elevator guide rail workpiece to be 1.2 mu m;

s3, calculating the kinematic viscosity of the anti-rust oil to be 6.53 multiplied by 10 according to the surface roughness of the elevator guide rail^-6m²/s；

S4, preparing the anti-rust oil according to the kinematic viscosity of the anti-rust oil in the S3;

s5, placing the elevator guide rail workpiece on an oiling device, and uniformly covering a layer of anti-rust oil film in the step S5 on the surface of the elevator guide rail workpiece;

and S6, conveying the elevator guide rail workpiece into a film sticking device to finish film sticking.

Wherein the kinematic viscosity of the rust preventive oil is calculated byWherein S is the surface roughness of the elevator guide rail workpiece, and the unit is mum; h is the thickness of the anti-rust oil film layer, the unit is mum, V is the coating speed of the anti-rust oil, the unit is m/s, a is the thermal expansion coefficient of the elevator guide rail workpiece,wherein T is₁Is the temperature, T, of the elevator guide rail₂The temperature of the rust preventive oil.

In the embodiment, the anti-rust oil comprises the following components in parts by weight: 100 parts of rapeseed oil, 10 parts of carboxyl modified chitosan, 10 parts of rosin, 5 parts of fullerene, 5 parts of low-density polyethylene wax, 5 parts of sodium dodecyl benzene sulfonate, 1 part of cocamidopropyl betaine, 10 parts of silicone oil and 188.3 parts of petroleum ether.

The preparation method of the rust preventive oil in the embodiment is as follows:

a1, controlling the temperature of a reaction kettle at 50-60 ℃, adding 100 parts of rapeseed oil, 10 parts of carboxyl modified chitosan, 5 parts of fullerene, 10 parts of rosin, 5 parts of low-density polyethylene wax and 10 parts of silicone oil into the reaction kettle, stirring for reaction, and placing the materials into an ultrasonic instrument for ultrasonic dispersion for 1 hour;

a2, adding 50 parts of sodium dodecyl benzene sulfonate and 1 part of cocamidopropyl betaine into the step A1, heating to 70-80 ℃, stirring for 15min to obtain a mixed solution, wherein the mass part of the mixed solution is 191 parts, and the kinematic viscosity of the mixed solution is measured to be 35 multiplied by 10^{- 6}m²/s；

A3 checking the general solvent table to obtain petroleum ether with kinematic viscosity of 0.3X 10^-6m²188.3 parts of petroleum ether is obtained by calculating the addition amount of the petroleum ether and the motion viscosity of the anti-rust oil;

a4, adding 188.3 parts of petroleum ether into the mixed solution, and performing ultrasonic dispersion for 30min to obtain the anti-rust oil.

In this example, the amount of petroleum ether added was in accordance with the formulaCan be calculated, wherein, W_TThe mass portion of the mixed solution (the total mass portion of the rust preventive oil except the diluent),is the kinematic viscosity of the petroleum ether and is,is the kinematic viscosity of the mixed solution (rust preventive oil other than the diluentKinematic viscosity of the component); the average molecular weight of the low-density polyethylene wax is 3000-5000.

Example 2: surface treatment method for elevator guide rail workpiece

In the embodiment, the coating speed of the anti-rust oil is set to be 0.6m/s, the thickness of the anti-rust oil film layer is set to be 12 microns, the temperature of the anti-rust oil is 24 ℃, the temperature of the elevator guide rail workpiece is 22 ℃, and the thermal expansion coefficient of the elevator guide rail workpiece after being cleaned and dried is 11.6.

The surface treatment method of the elevator guide rail workpiece in the embodiment specifically comprises the following operation steps:

s1, cleaning and drying the surface of the elevator guide rail workpiece;

s2, measuring the surface roughness of the elevator guide rail workpiece to be 1.4 mu m;

s3, calculating the kinematic viscosity of the anti-rust oil to be 5.65 multiplied by 10 according to the surface roughness of the elevator guide rail^-6m²/s；

S4, preparing the anti-rust oil according to the kinematic viscosity of the anti-rust oil in the S3;

s5, placing the elevator guide rail workpiece on an oiling device, and uniformly covering a layer of anti-rust oil film in the step S5 on the surface of the elevator guide rail workpiece;

and S6, conveying the elevator guide rail workpiece into a film sticking device to finish film sticking.

Wherein the kinematic viscosity of the rust preventive oil is calculated byWherein S is the surface roughness of the elevator guide rail workpiece, and the unit is mum; h is the thickness of the anti-rust oil film layer, the unit is mum, V is the coating speed of the anti-rust oil, the unit is m/s, a is the thermal expansion coefficient of the elevator guide rail workpiece,wherein T is₁Is the temperature, T, of the elevator guide rail₂The temperature of the rust preventive oil.

In the embodiment, the anti-rust oil comprises the following components in parts by weight: 120 parts of palm oil, 20 parts of carboxyl modified chitosan, 10 parts of rosin, 8 parts of fullerene, 8 parts of low-density polyethylene wax, 9 parts of sodium dodecyl benzene sulfonate, 2 parts of cocamidopropyl betaine, 10 parts of silicone oil and 199.7 parts of kerosene.

The preparation method of the rust preventive oil in the embodiment is as follows:

a1, controlling the temperature of a reaction kettle at 50-60 ℃, adding 120 parts of palm oil, 20 parts of carboxyl modified chitosan, 8 parts of fullerene, 10 parts of rosin, 5 parts of low-density polyethylene wax and 10 parts of silicone oil into the reaction kettle, stirring for reaction, and placing the materials into an ultrasonic instrument for ultrasonic dispersion for 1 hour;

a2, adding 50 parts of sodium dodecyl benzene sulfonate and 1 part of cocamidopropyl betaine into the step A1, heating to 70-80 ℃, stirring for 15min to obtain a mixed solution, wherein the mass part of the mixed solution is 224 parts, and the kinematic viscosity of the mixed solution is 42 multiplied by 10^{- 6}m²/s；

A3, kinematic viscosity of kerosene 1.2X 10 according to GB256-1988 test method^-6m²The addition amount of kerosene is 199.7 parts calculated by a kinematic viscometer of antirust oil;

a4, adding 199.7 parts of petroleum ether into the mixed solution, and performing ultrasonic dispersion for 30min to obtain the anti-rust oil.

In this example, the amount of petroleum ether added was in accordance with the formulaCan be calculated, wherein, W_TThe mass portion of the mixed solution (the total mass portion of the rust preventive oil except the diluent),is the kinematic viscosity of the petroleum ether and is,the kinematic viscosity of the mixed solution (the kinematic viscosity of the other components of the rust preventive oil except the diluent in the rust preventive oil); the average molecular weight of the low-density polyethylene wax is 3000-5000.

It is worth to say that in the technical scheme provided by the invention, a rust preventive oil film layer with a more appropriate thickness can be set according to the thickness of a protective film attached in a subsequent film attaching process, the addition amount of a diluent of the rust preventive oil is determined according to the thickness of the rust preventive oil film layer, or after the overall kinematic viscosity of the rust preventive oil is determined, the coating speed of the rust preventive oil is calculated according to the formula provided by the invention, so that more accurate processing parameters are provided for the processing technology of the elevator guide rail workpiece.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.