阅读说明：本技术 一种2mm以下不锈钢板的预处理方法 (Pretreatment method of stainless steel plate with thickness of less than 2mm ) 是由 王欣南 于 2020-06-09 设计创作，主要内容包括：本发明涉及了一种2mm以下不锈钢板的预处理方法,其包括以下步骤：a、输送辊道将不锈钢板送入多辊矫平机；b、备料金属基板；在金属基板上设置有容纳沉槽,以用来沉放不锈钢板；c、随后将金属基板和不锈钢板作为一个整体置放到输送辊道上；d、成对不锈钢板正面的喷砂处理；e、将不锈钢板与金属基板相脱离,将不锈钢板送入到清洗室；f、清洗后进行烘干处理；g、将不锈钢板运出预处理流水线。相较于传统设计结构的不锈钢板预处理生产线,在本发明中增入了金属基板以辅助喷砂工序,以平衡喷砂所造成的瞬时冲击力,保证不锈钢板在喷砂的进程中始终保持于平衡受力状态,确保其经过喷砂处理后的整体平整度。(The invention relates to a pretreatment method of a stainless steel plate with the thickness of less than 2mm, which comprises the following steps: a. the stainless steel plate is sent to a multi-roll leveler by a conveying roller way; b. preparing a metal substrate; the metal substrate is provided with a containing sinking groove for sinking the stainless steel plate; c. then putting the metal substrate and the stainless steel plate as a whole on a conveying roller way; d. performing sand blasting treatment on the front surfaces of the paired stainless steel plates; e. separating the stainless steel plate from the metal substrate, and conveying the stainless steel plate into a cleaning chamber; f. drying after cleaning; g. and (4) conveying the stainless steel plate out of the pretreatment production line. Compared with the stainless steel plate pretreatment production line with the traditional design structure, the stainless steel plate pretreatment production line has the advantages that the metal substrate is added to assist the sand blasting process so as to balance the instantaneous impact force caused by sand blasting, the stainless steel plate is always kept in a balanced stress state in the sand blasting process, and the integral flatness of the stainless steel plate after sand blasting is ensured.)

1. A pretreatment method of a stainless steel plate with the thickness of less than 2mm is characterized by comprising the following steps:

a. the stainless steel plate is sent to a multi-roller leveling machine by a conveying roller way and is leveled;

b. preparing a metal substrate, wherein the surface flatness of the metal substrate is controlled within 0.5 mm; the metal substrate is provided with an accommodating sinking groove, and the length and the width of the accommodating sinking groove are matched with those of the stainless steel plate; then, placing the stainless steel plate in the accommodating sinking groove;

c. then putting the metal substrate and the stainless steel plate as a whole on a conveying roller way;

d. the conveying roller way conveys the metal substrate and the stainless steel plate to pass through a sand blasting chamber simultaneously so as to complete sand blasting treatment on the front surface of the stainless steel plate;

e. separating the stainless steel plate from the metal substrate, and conveying the separated stainless steel plate into a cleaning chamber by using a conveying roller way;

f. conveying the washed stainless steel plate into a drying chamber by a conveying roller way to dry;

g. the stainless steel plate is transported out of the pretreatment production line by the conveying roller way.

2. The method for pretreating a stainless steel sheet having a thickness of 2mm or less according to claim 1, wherein a plurality of vacuum suction holes are uniformly formed in the accommodating well for sucking the stainless steel sheet; the vacuum suction holes are communicated with a vacuum generator.

3. The method for pretreating a stainless steel sheet with a thickness of 2mm or less according to claim 1, wherein a copper backing plate is further added in step b; the copper base plate is clamped between the accommodating sink groove and the stainless steel plate; a strip-shaped groove is formed in the upper surface of the copper base plate; the number of the strip-shaped grooves is set to be a plurality of, and the strip-shaped grooves are uniformly distributed along the length direction or/and the width direction of the copper base plate.

4. The method for pretreating a stainless steel sheet having a thickness of 2mm or less according to claim 3, wherein t 1. ltoreq. t 2. ltoreq. t1+1 assuming that the thickness of the pretreated stainless steel sheet is t1 and the thickness of the copper backing sheet is t 2.

5. The method for pretreating a stainless steel sheet having a thickness of 2mm or less as claimed in claim 1, wherein the size of the silica sand used for blasting is controlled to 1-2mm, and the pressure of the blasting compressed air is controlled to 150-250 KPa.

6. The method for pretreating a stainless steel sheet having a thickness of 2mm or less according to any one of claims 1 to 5, further comprising a step e1 provided between the step e and the step f; the specific content of step e1 is: and (3) immersing the stainless steel plate subjected to sand blasting treatment into a 40 ℃ solution of HN03250-300g/L for passivation for more than 2 h.

7. The method for pretreating a stainless steel sheet having a thickness of 2mm or less according to any one of claims 1 to 5, further comprising a step c1 provided between the step c and the step d; the concrete content of the step c1 is as follows: before the main sand blasting treatment, the stainless steel plate is heated and heated, and the temperature is controlled at 600-650 ℃.

8. The method for pretreating a stainless steel sheet having a thickness of 2mm or less according to claim 7, wherein the stainless steel sheet is heat-treated by a heat effect generated by high energy of a laser beam, and the rate of temperature rise is controlled to 50 to 65 ℃/s.

Technical Field

The invention relates to the field of material surface treatment, in particular to a pretreatment method of a stainless steel plate with the thickness of less than 2 mm.

Background

Before the formal embossment operation is carried out on the stainless steel plate, only the single side (pre-embossment etching side) of the stainless steel plate needs to be pretreated, so that the physical and mechanical properties of the workpiece are improved, the surface roughness is reduced, the lubrication state of the surface of the workpiece is improved, the friction coefficient of the surface of the workpiece is improved, and therefore, the stainless steel plate is fully prepared for the good forming of subsequent embossment patterns. The pretreatment process generally comprises the procedures of early leveling, sand blasting, cleaning, primary drying, primer spraying, secondary drying and the like.

The operation principle of the sand blasting process is as follows: the machine adopts compressed air as power to form a high-speed spray beam to spray materials on the surface of a stainless steel plate to be treated at high speed, so that the mechanical property of the outer surface of the stainless steel plate is changed. The surface of the stainless steel plate is enabled to obtain certain cleanliness and different roughness due to the impact and cutting action of the abrasive on the surface of the stainless steel plate, so that the mechanical property of the surface of a workpiece is improved, and therefore, the surface of the stainless steel plate is enabled to be coarsened, the residual stress of the workpiece is eliminated, and the surface hardness of a base material is improved. In the actual pretreatment stage of a factory, when the thickness of the stainless steel plate is large, a good cleaning effect can be obtained after sand blasting process treatment. However, when the thickness of the stainless steel plate is less than 2mm, irregular bending deformation (for example, upward arching or downward sinking deformation) is inevitably generated by the impact of the blasting material sprayed at a high speed during the sand blasting process, and then, a large amount of manpower and material resources are consumed to repeatedly level the stainless steel plate so that the flatness thereof satisfies a standard value. Therefore, a skilled person is urgently needed to solve the above problems.

Disclosure of Invention

The invention aims to provide a pretreatment method of a stainless steel plate with the thickness less than 2mm, which can effectively prevent the stainless steel plate from deforming in the sand blasting process.

In order to solve the technical problem, the invention relates to a pretreatment method of a stainless steel plate with the thickness of less than 2mm, which comprises the following steps:

a. the stainless steel plate is sent to a multi-roller leveling machine by a conveying roller way and is leveled;

b. preparing a metal substrate, wherein the surface flatness of the metal substrate is controlled within 0.5 mm; the metal substrate is provided with an accommodating sinking groove, and the length and the width of the accommodating sinking groove are matched with those of the stainless steel plate; then, placing the stainless steel plate in the accommodating sinking groove;

c. then putting the metal substrate and the stainless steel plate as a whole on a conveying roller way;

d. the conveying roller way conveys the metal substrate and the stainless steel plate to pass through a sand blasting chamber simultaneously so as to complete sand blasting treatment on the front surface of the stainless steel plate;

e. separating the stainless steel plate from the metal substrate, and conveying the separated stainless steel plate into a cleaning chamber by using a conveying roller way;

f. conveying the washed stainless steel plate into a drying chamber by a conveying roller way to dry;

g. the stainless steel plate is transported out of the pretreatment production line by the conveying roller way.

As a further improvement of the technical scheme of the invention, a plurality of vacuum suction holes are uniformly distributed in the accommodating sinking groove and are used for adsorbing the stainless steel plate which is subjected to sand blasting treatment in advance. The vacuum suction holes are communicated with a vacuum generator.

As a further improvement of the technical scheme of the invention, a copper backing plate can be added in the step b according to the actual situation. The copper backing plate is clamped between the accommodating sink groove and the stainless steel plate. And the upper surface of the copper backing plate is provided with a strip-shaped groove. The number of the strip-shaped grooves is set to be a plurality of, and the strip-shaped grooves are uniformly distributed along the length direction or/and the width direction of the copper base plate.

As a further improvement of the technical scheme of the invention, assuming that the thickness of the pretreated stainless steel plate is t1 and the thickness of the copper backing plate is t2, t1 is not less than t2 is not less than t1+ 1.

As a further improvement of the technical scheme of the invention, the size of the quartz sand used for sand blasting is controlled to be 1-2mm, and the pressure of sand blasting compressed air is controlled to be 150-250 KPa.

As a further improvement of the technical solution of the present invention, the method further comprises a step e1, which is arranged between the step e and the step f. The specific content of step e1 is: and (3) immersing the stainless steel plate subjected to sand blasting treatment into a 40 ℃ solution of HN03250-300g/L for passivation for more than 2 h.

As a further improvement of the technical solution of the present invention, the method further comprises a step c1, which is arranged between the step c and the step d. The concrete content of the step c1 is as follows: before the main sand blasting treatment, the stainless steel plate is heated and heated, and the temperature is controlled at 600-650 ℃.

As a further improvement of the technical scheme of the invention, the stainless steel plate is heated by utilizing the heat effect generated by high energy of the laser beam, and the temperature rise speed is controlled to be 50-65 ℃/s.

Through adopting above-mentioned technical scheme to set up, in the process of actually carrying out the sandblast, the corrosion resistant plate is supported, is leaned on by metal substrate all the time to with the transient impact force that the balanced sandblast caused, guarantee that the corrosion resistant plate remains in balanced stress state in the process of sandblast all the time, ensure its whole roughness after the sandblast is handled.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view showing the disposition of a first embodiment of a stainless steel sheet in a method for pretreating a stainless steel sheet having a thickness of 2mm or less according to the present invention.

FIG. 2 is a schematic view showing the disposition of a second embodiment of a stainless steel sheet in a method for pretreating a stainless steel sheet having a thickness of 2mm or less according to the present invention.

FIG. 3 is a schematic view showing the disposition of a third embodiment of a stainless steel sheet in a method for pretreating a stainless steel sheet having a thickness of 2mm or less according to the present invention.

FIG. 4 is a schematic view showing the structure of a copper shim plate in the method for pretreating a stainless steel sheet having a thickness of 2mm or less according to the present invention.

1-stainless steel plate; 2-a metal substrate; 21-accommodating sink; 22-vacuum suction holes; 3-copper backing plate; 31-bar-shaped grooves.

Detailed Description

The technical solution disclosed by the present invention is described below with reference to examples.