CN117300740A - Continuous polishing process for ultrathin knife net - Google Patents

Abstract

The invention relates to a continuous polishing process for ultra-thin knife nets, which includes the following steps: S1, rolling and unwinding of metal sheets; S2, polishing of metal sheets. On the one hand, the invention automatically performs unwinding, transmission and rewinding through the formation, and the relatively constant tension formed in the up and down circuits keeps the scroll speed greater than the unwinding speed for continuous transmission, effectively avoiding tearing, transmission slippage and knife web deformation. and other phenomena occur; on the other hand, quantitative grinding through the following grinding wheel not only ensures that the thickness of the knife mesh passing through the grinding area is consistent, but also the rotation speed and rotation direction of the grinding wheel can be changed in real time to avoid interference in the transmission of metal sheets caused by the grinding wheel. And it can greatly reduce the probability of scratches or damage on the surface of the knife mesh.

Description

A continuous polishing process for ultra-thin knife nets

Technical field

The invention belongs to the technical field of daily necessities processing, and specifically relates to a continuous polishing and grinding process of ultra-thin knife nets.

Background technique

At present, the knife net refers to the protective net of the knife. For example, in shaving products, through the combination of the knife and the skin, the hair is introduced into the shearing area formed by the knife net and the knife to complete shaving. Therefore, the knife The softness of the mesh is very important, and it should be made as ultra-thin as possible.

However, with the pursuit of ultra-thin knife mesh thickness (for example: 0.05 ~ 1.00 mm), and requirements such as smooth surface and contact comfort, it is necessary to polish the back of the mesh after the mesh is punched to avoid burrs. Generally speaking, the quality of the knife net is mostly polished with a grinding wheel. However, due to the ultra-thin characteristics of the knife net itself, there will be the following shortcomings in the grinding process:

1) In terms of transmission, once the knife net is offset or the tension is unstable, it will cause tearing, transmission slippage, knife net deformation, missing polishing, etc., that is, it will not only affect the quality of the knife net, but also make continuous processing impossible. ;

2) All the grinding wheels used are driving wheels. During the grinding process, the grinding wheel speed is constant, but the grinding amount caused by the burrs changes. That is, the knife network transmission speed will also change during the grinding process, so , which greatly increases the probability of scratches or damage on the surface of the knife net, and also increases the difficulty of stable transmission of the knife net.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the existing technology and provide a brand new continuous polishing process for ultra-thin knife nets.

In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

A continuous polishing process for ultra-thin knife nets. The ultra-thin knife nets are stamped and formed from metal sheets into rolls. It is characterized in that the process includes the following steps:

S1. Rolling and unwinding of metal sheets

The rolled metal sheet exits from the unwinding disc of the unwinding station, passes through multiple transfer rollers in an up and down circuitous manner, and is wound on the winding disc of the winding station, where the winding speed is the unwinding speed. 1.1 to 1.5 times, the rotation centers of the unwinding disk and the take-up disk are aligned and located between the top and bottom of the up and down circuit, and the metal sheet maintains a relatively constant tension transmission between the unwinding disk and the take-up disk ;

S2. Polishing of metal sheets

A freely rotatable grinding wheel is arranged on the conveying path of the metal sheet by being aligned up and down with any one of the conveying rollers, wherein any one of the conveying rollers can wind the metal sheet with the surface to be polished facing outward, and A grinding area is formed between the wheel surface of the grinding wheel and the corresponding roller surface of the transfer roller. The metal sheet keeps the surface to be polished facing the grinding wheel, and the length of the winding section formed by wrapping around the roller surface remains unchanged, and the length of the winding section is constant. The grinding wheel passes through the grinding area tangentially, so that the grinding wheel follows and covers the surface to be grinded.

According to a specific implementation and preferred aspect of the present invention, transmission perforations are evenly spaced at equal intervals on opposite sides of the metal sheet, and transmission protrusions matching the transmission perforations are formed at both ends of the transmission roller, wherein the transmission protrusions at the same end are The arc length formed between the two transmission protrusions is equal to the distance between the corresponding two adjacent transmission perforations. In the transmission of S1, the cooperation between the transmission protrusions and the transmission perforations limits the width of the metal sheet. Shift in direction. Through the characteristics of the metal sheet itself, the transmission roller is used to form an interspersed and matched movement, so that the ultra-thin knife net can be transported and polished more smoothly.

Preferably, each transmission protrusion is arched along the radial direction of the transmission roller and can be inserted into the corresponding transmission perforation. The outer end surface of each transmission protrusion is spherical to avoid transmission damage to the metal sheet caused by the transmission protrusion.

In some embodiments, the height of the arch of the transmission protrusion is less than or equal to the thickness of the metal sheet. It is convenient for the transmission protrusions to pass through and out of the transmission perforations, and further improves the stability of the metal sheet transmission, while avoiding the wear of the transmission protrusions when the grinding wheel grinds the transmission perforations.

According to another specific implementation and preferred aspect of the present invention, in S1, limiting collars are provided at both ends of each transmission roller, wherein the distance between the limiting collars located on the same transmission roller is equal to The width of the metal sheet, and the limiting collars located at the same end between the plurality of conveying rollers are aligned and arranged.

The limiting collar can be slidably adjusted along the length direction of the corresponding conveying roller.

According to another specific implementation and preferred aspect of the present invention, in S1, there are three transmission rollers, and in the orthographic projection of the axis of the transmission roller, the center line of the three transmission rollers forms an isosceles triangle, so The grinding wheel is located directly above the transmission roller corresponding to the vertex of the isosceles triangle.

Preferably, the line connecting the two rotation centers and the perpendicular line from the apex to the base of the isosceles triangle are perpendicular to each other.

In some specific embodiments, the arc length of the winding section formed by the metal sheet wrapped around each transfer roller is 1/5 to 1/2 of the circumference of the transfer roller.

In addition, the thickness of the metal sheet is 0.01 to 0.1 mm; and/or the surfaces to be polished are evenly spaced in the length direction of the metal sheet, and in the grinding of S2, the winding speed and the retracting speed are The roll speed remains unchanged.

Due to the implementation of the above technical solutions, the present invention has the following advantages compared with the prior art:

During the polishing and grinding process of the existing ultra-thin knife mesh, in terms of transmission, it is easy to cause tearing, transmission slippage, deformation of the knife mesh, missing grinding and other phenomena; during the polishing process, the speed of the grinding wheel remains unchanged, and during the grinding process It will also change the transmission speed of the knife net. Therefore, it not only greatly increases the probability of scratches or damage on the surface of the knife net, but also increases the difficulty of stable transmission of the knife net. However, the present invention comprehensively improves the ultra-thin knife net polishing process. The design cleverly solves various deficiencies in the existing knife net polishing. After using this knife net polishing process, the metal sheet is wound up and down in a circuitous manner around multiple transmission rollers, and the rotation centers of the unwinding disk and the take-up disk are aligned and located between the top and bottom of the circuitous up and down, and the metal sheets remain relatively Constant tension is transmitted between the unwinding disc and the take-up disc. At the same time, the metal sheet keeps the surface to be polished facing the grinding wheel, the length of the winding section formed by wrapping around the roller surface remains unchanged, and the metal sheet passes through the grinding area tangent to the grinding wheel. , in order to carry out grinding in which the grinding wheel follows and covers the surface to be polished. Therefore, compared with the prior art, the present invention automatically performs unwinding, transmission, and winding through the formation, and forms a relatively constant up and down circuit. The tension keeps the scroll speed greater than the unwinding speed for continuous transmission, effectively avoiding tearing, transmission slippage, knife web deformation, etc.; on the other hand, quantitative grinding through the following grinding wheel not only ensures that the knife web passes through the grinding area The thickness is consistent, and the speed and direction of rotation of the grinding wheel can be changed in real time to avoid interference in the transmission of metal sheets caused by the grinding wheel, and can greatly reduce the probability of scratches or damage on the surface of the knife mesh.

Description of drawings

Figure 1 is a schematic diagram of the polishing structure used in the continuous polishing process of ultra-thin knife mesh in Example 1;

Figure 2 is a schematic front view of Figure 1;

Figure 3 is a partial structural diagram of Figure 1;

Figure 4 is a schematic top view of Figure 3;

Figure 5 is a schematic cross-sectional view along the A-A direction in Figure 4;

Figure 6 is a schematic diagram of the polishing structure used in the continuous polishing process of ultra-thin knife mesh in Example 2;

Figure 7 is a schematic front view of Figure 1;

Figure 8 is a partial structural diagram of Figure 1;

Figure 9 is a schematic top view of Figure 8;

Figure 10 is a schematic cross-sectional view along B-B in Figure 9;

Among them: A, unwinding unit; A1, D1, motor; A2, D2, reel; A3, unwinding disc;

B. Transmission unit; B1, transmission roller; B10, transmission protrusion; B11, limit collar; B12, U-shaped frame;

C. Grinding unit; c1, grinding wheel;

D. Rewinding unit; D3. Rewinding disc;

J. Metal sheet; j. Transfer auxiliary hole.

Detailed ways

In order to make the above objects, features and advantages of the present invention more obvious and easy to understand, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, the present invention can be implemented in many other ways different from those described here. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right" The directions or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" etc. are based on those shown in the accompanying drawings. The orientation or positional relationship shown is only to facilitate the description of the present invention and simplify the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of the present invention. limit.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, features defined by "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

In the present invention, unless otherwise expressly stipulated and limited, the terms "installation", "connection", "connection" and "fixing" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or a detachable connection. Integration; it can be directly connected or indirectly connected through an intermediary. It can be the internal connection between two elements or the interaction between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the invention, unless otherwise expressly stated and limited, a first feature being "on" or "below" a second feature may be a direct contact between the first and second features, or an indirect contact between the first and second features through an intermediate medium. . Moreover, the terms "above", "above" and "above" the first feature is "above" the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "under" the first feature is the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

It should be noted that when an element is referred to as being "mounted" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may also be intervening elements present. The terms “vertical”, “horizontal”, “upper”, “lower”, “left”, “right” and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manner.

Example 1

As shown in Figures 1 to 5, the ultra-thin knife net provided in this embodiment is stamped and rolled from a metal sheet, and meshes are formed at equal intervals in the length direction of the metal sheet, wherein the The surface is divided into front and back, and the mesh is punched from the front to the back. Therefore, burrs or burrs are formed on the back of the metal sheet. In this implementation, a polishing device and a specific process are used to polish the metal sheet with a thickness of approximately 0.01 to 0.1 mm. The mesh is polished during the unwinding process.

In some specific embodiments, the polishing and grinding device used includes an unwinding unit A, a conveying unit B, a grinding unit C, and a winding unit D.

In some specific embodiments, the unwinding unit A and the rewinding unit D are conventional structures in the art, and mainly include motors A1 and D1; reels A2 and D2; unwinding discs A3 and rewinding discs D3, in which the rolled metal The sheet J is installed on the reels A2 and D2 through the unwinding disk A3 and the winding disk D3 respectively, and is unwinded and rewinded when the motors A1 and D1 drive the rotation of the reels A2 and D2. Although the structure is relatively conventional, in this application, the layout and rotation speed of the reel have special requirements, as follows.

In this example, the layout of reels A2 and D2 is related to the conveyor unit B, where the conveyor unit B includes three conveyor rollers B1 located in sequence between the unwinding unit A and the winding unit D. The two reels A2, D2, and the three conveyor rollers Roller B1 is distributed in a circuitous manner in the up and down direction, and limit collars B11 are provided at both ends of each conveyor roller B1. The limit collars B11 located at the same end are aligned and distributed, and the two limit collars B11 located on the same conveyor roller B1 The distance between the bit collars B11 is equal to the width of the metal sheet J.

In some specific implementations, each limiting collar B11 is slidably adjusted along the length direction of the corresponding transmission roller B1. Meet the transmission limitations when transporting metal sheets of different widths. In the orthographic projection of the axis of the transmission roller B1, the center lines of the three transmission rollers B1 (all driven rollers) form an isosceles triangle. The rotation centers of the unwinding unit A and the winding unit D are aligned, and the line connecting the two rotation centers is located between the base and the vertex of the isosceles triangle. The line connecting the two centers of rotation and the perpendicular line from the vertex to the base of the isosceles triangle are perpendicular to each other. The rotation centers of the unwinding unit A and the rewinding unit D are respectively located on the left and right sides of the isosceles triangle. The distance between the rotational center of the unwinding unit A and the left end point of the bottom of the isosceles triangle, And the distance between the rotation center of the winding unit D and the right end point of the base of the isosceles triangle is equal. The three transmission rollers B1 are respectively installed through three U-shaped brackets B12, and the three transmission rollers B1 are arranged in parallel. Then, considering the adjustment in the up and down directions, each U-shaped bracket B12 can be raised and lowered (not shown in the figure).

The metal sheet J unloaded by the self-unwinding unit A is wound on multiple conveying rollers B1 in an up and down circuitous manner, and the arc length of the formed winding section is 1/5 to 1/2 of the circumference of the corresponding conveying roller. The resulting bonding length is more conducive to the tensioning and transmission of metal sheets. Generally, 1/5 to 1/3 is more suitable. As for the outer diameter of the transmission roller 1, it can be selected according to actual needs. The wound metal sheet J is rolled up by the winding unit D, and the winding speed is about 1.2 times the unwinding speed. Therefore, the winding and unwinding are performed under relatively constant tension.

Grinding unit C includes a grinding wheel c1 that rotates freely around its own axis. The grinding wheel c1 is located directly above the transmission roller B1 where the apex of the isosceles triangle is located. The grinding wheel c1 is installed in vertical alignment with the transmission roller B1. The wheel surface of the grinding wheel c1 corresponds to A gap is formed between the roller surfaces of the transfer roller B1 to match the thickness of the metal sheet J, and in the top-down orthographic projection, the wheel surface of the grinding wheel c1 covers the area to be polished of the mesh holes of the metal sheet J.

In summary, the implementation steps of this embodiment are as follows:

S1. Rolling and unwinding of metal sheets

The rolled metal sheet J exits from the unwinding disc A3 of the unwinding station, passes through multiple conveyor rollers B1 in an up and down circuitous manner, and is wound around the winding disc D3 of the winding station, where the winding speed is 1.1 to 1.5 times the unwinding speed. The rotation centers of the unwinding disc A3 and the take-up disc D3 are aligned and located between the top and bottom of the up and down circuit. The metal sheet J maintains a relatively constant tension transmission between the unwinding disc A3 and the take-up disc. between D3;

S2. Polishing of metal sheets

On the conveying path of the metal sheet J, the back side of the metal sheet J can be wound against the outside through the conveying roller B1 corresponding to the top of the isosceles triangle. The grinding wheel c1 can rotate freely and is located directly above the conveying roller B1, and the grinding wheel A grinding area is formed between the wheel surface of c1 and the corresponding roller surface of the transfer roller B1. The metal sheet J keeps the back side facing the grinding wheel c1, is wrapped around the roller surface of the transfer roller B1, and forms a winding section with a constant length, and is in contact with the grinding wheel c1. It passes through the grinding area tangentially to follow the grinding wheel c1 and complete the grinding of the back.

It can be seen from the above that after using the knife net polishing process, the metal sheet is wound up and down in a circuitous manner and multiple transmission rollers are arranged side by side, and the rotation centers of the unwinding disk and the take-up disk are aligned and located between the top and bottom of the circuitous up and down, the metal sheet The sheet maintains a relatively constant tension and is transmitted between the unwinding disc and the take-up disc. At the same time, the metal sheet keeps the surface to be polished facing the grinding wheel, the length of the winding section formed by wrapping around the roller surface remains unchanged, and the metal sheet passes tangent to the grinding wheel. The grinding area is used for grinding where the grinding wheel follows and covers the surface to be polished. Therefore, compared with the prior art, the present invention can automatically unwind, transport, and rewind through the formation of the grinding area. A relatively constant tension is formed to keep the scroll speed greater than the unwinding speed for continuous transmission, effectively avoiding tearing, transmission slippage, knife web deformation and other phenomena; on the other hand, the quantitative grinding through the following grinding wheel not only ensures that through grinding The thickness of the knife net in the area is consistent, and the speed and direction of rotation of the grinding wheel can be changed in real time to avoid interference in the transmission of metal sheets caused by the grinding wheel, and can greatly reduce the probability of scratches or damage to the surface of the knife net; the third aspect is through the unwinding unit It is aligned with the rotation center of the winding unit, and the line connecting the two rotation centers is located between the base and the vertex of the isosceles triangle. This layout can achieve relatively constant transmission of metal sheet tension; the fourth aspect is to set the Under the speed difference, it is more conducive to the smooth transmission of metal sheets without changing the length of the winding section, so as to achieve the purpose of stably outputting metal sheets; the fifth aspect is to further avoid transmission deviation through the restriction of the limit collar, and It can meet the transmission of metal sheets of different widths; the sixth aspect is that the grinding wheel is located directly above the transmission roller where the apex of the isosceles triangle is, which is not only convenient in layout, but also has a tangential grinding effect to reduce pull marks during the follow-up.

Example 2

As shown in FIGS. 6 to 10 , the polishing device involved in this embodiment is the same as Embodiment 1, and includes an unwinding unit A, a transmission unit B, a grinding unit C, and a winding unit D.

The difference is that the opposite sides of the metal sheet J in this application have uniformly spaced transmission auxiliary holes j distributed at equal intervals. At the same time, the two ends of each transmission roller B1 form a plurality of transmission protrusions distributed around its circumference. B10, at the same time, limit collars B11 are respectively provided at both ends of each transmission roller B1, in which the arc length formed between two adjacent transmission protrusions B10 located at the same end is equal to the two adjacent transmission auxiliary holes j side by side. The distance between them and the distance between the limiting collars B11 is equal to the width of the metal sheet J, and each limiting collar B11 is slidably adjusted along the length direction of the corresponding conveying roller B1.

In some specific embodiments, each transmission protrusion B10 is arched along the radial direction of the transmission roller B1 and can be inserted into the corresponding transmission auxiliary hole j, wherein the outer end surface of each transmission protrusion B10 is spherical to avoid transmission protrusions Causes transmission damage to the metal sheet; the arched height of the transmission protrusion B10 is equal to the thickness of the metal sheet J, which facilitates the insertion and removal of the transmission protrusion from the transmission hole, and further improves the transmission of the metal sheet. The limiting collar B11 is annular, and is relatively fixed on the transmission roller B1 through the collision of multiple locking bolts, and the limiting collar B11 and the transmission roller B1 remain concentric.

In summary, the implementation process of this embodiment is as follows:

S1. Rolling and unwinding of metal sheets

The rolled metal sheet J exits from the unwinding disc A3 of the unwinding station. The metal sheet J is wound on the three conveying rollers B1 in an up and down circuitous manner, and the corresponding conveying auxiliary holes j on the opposite sides of the formed winding section are The transmission protrusions B10 at the corresponding ends match, and at the same time, the metal sheet J is resisted between the limiting collars B11 from both sides in the width direction. Then, the transmission roller B1 transports the metal sheet J and winds it around the winding disc D3 of the winding station. on, where the winding speed is 1.1 to 1.5 times the unwinding speed, the rotation centers of the unwinding disc A3 and the rewinding disc D3 are aligned and located between the top and bottom of the up and down circuit, and the metal sheet J maintains a relatively constant tension transmission in Between the unwinding disc A3 and the winding disc D3;

S2. Polishing of metal sheets

On the conveying path of the metal sheet J, the back side of the metal sheet J can be wound against the outside through the conveying roller B1 corresponding to the top of the isosceles triangle. The grinding wheel c1 can rotate freely and is located directly above the conveying roller B1, and the grinding wheel A grinding area is formed between the wheel surface of c1 and the corresponding roller surface of the transfer roller B1. The metal sheet J keeps the back side facing the grinding wheel c1, is wrapped around the roller surface of the transfer roller B1, and forms a winding section with a constant length, and is in contact with the grinding wheel c1. It passes through the grinding area tangentially to follow the grinding wheel c1 and complete the grinding of the back.

It can be seen from the above that after using the knife net polishing process, the metal sheet is wound up and down in a circuitous manner and multiple transmission rollers are arranged side by side, and the rotation centers of the unwinding disk and the take-up disk are aligned and located between the top and bottom of the circuitous up and down, the metal sheet The sheet maintains a relatively constant tension and is transmitted between the unwinding disc and the take-up disc. At the same time, the metal sheet keeps the surface to be polished facing the grinding wheel, the length of the winding section formed by wrapping around the roller surface remains unchanged, and the metal sheet passes tangent to the grinding wheel. The grinding area is used for grinding where the grinding wheel follows and covers the surface to be polished. Therefore, compared with the prior art, the present invention can automatically unwind, transport, and rewind through the formation of the grinding area. A relatively constant tension is formed to keep the scroll speed greater than the unwinding speed for continuous transmission, effectively avoiding tearing, transmission slippage, knife web deformation and other phenomena; on the other hand, the quantitative grinding through the following grinding wheel not only ensures that through grinding The thickness of the knife net in the area is consistent, and the speed and direction of rotation of the grinding wheel can be changed in real time to avoid interference in the transmission of metal sheets caused by the grinding wheel, and can greatly reduce the probability of scratches or damage to the surface of the knife net; the third aspect is through the unwinding unit It is aligned with the rotation center of the winding unit, and the line connecting the two rotation centers is located between the base and the vertex of the isosceles triangle. This layout can achieve relatively constant transmission of metal sheet tension; the fourth aspect is to set the Under the speed difference, it is more conducive to the smooth transmission of metal sheets without changing the length of the winding section, so as to achieve the purpose of stably outputting metal sheets. The fifth aspect is that the insertion and matching of the transmission protrusions and transmission perforations also facilitates the transmission of the protrusions. The insertion and extraction of transmission holes further limits the deflection of the metal sheet. At the same time, the metal sheet is smoothly moved forward with the rotation of the transmission roller without changing the length of the winding section, so as to achieve the purpose of stably outputting the metal sheet; The sixth aspect is to further avoid transmission deviation through the restriction of the limit collar, and can meet the transmission of metal sheets of different widths; the seventh aspect is that the grinding wheel is located directly above the transmission roller where the apex of the isosceles triangle is, which is not only convenient in layout, but also Moreover, the tangential grinding effect reduces draw marks during follow-up.

The above detailed description of the present invention is intended to enable those familiar with the art to understand the content of the present invention and implement it. This does not limit the scope of protection of the present invention. Any work made based on the spirit of the present invention, etc. Effective changes or modifications shall be included in the protection scope of the present invention.

Claims (10)

1. A continuous polishing process for ultra-thin knife nets. The ultra-thin knife nets are stamped and formed from metal sheets and rolled into rolls. It is characterized in that the process includes the following steps: S1. Rolling and unwinding of metal sheets The rolled metal sheet exits from the unwinding disc of the unwinding station, passes through multiple transfer rollers in an up and down circuitous manner, and is wound on the winding disc of the winding station, where the winding speed is the unwinding speed. 1.1 to 1.5 times, the rotation centers of the unwinding disc and the rewinding disc are aligned and located between the top and bottom of the up and down circuit, and the metal sheet maintains a relatively constant tension transmission between the unwinding disc and the rewinding disc between; S2. Polishing of metal sheets A freely rotatable grinding wheel is arranged on the conveying path of the metal sheet by being aligned up and down with any one of the conveying rollers, wherein any one of the conveying rollers can wind the metal sheet with the surface to be polished facing outward, and A grinding area is formed between the wheel surface of the grinding wheel and the corresponding roller surface of the transfer roller. The metal sheet keeps the surface to be polished facing the grinding wheel, and the length of the winding section formed by wrapping around the roller surface remains unchanged, and the length of the winding section is constant. The grinding wheel passes through the grinding area tangentially, so that the grinding wheel follows and covers the surface to be grinded. 2. The continuous polishing process of ultra-thin knife mesh according to claim 1, characterized in that: the opposite sides of the metal sheet are evenly spaced with transmission perforations, and the two ends of the transmission roller correspond to A transmission protrusion matching the transmission perforation is formed, wherein the arc length formed between the two transmission protrusions at the same end is equal to the distance between the corresponding two adjacent transmission perforations. In the transmission of S1 , the displacement of the metal sheet in its own width direction is limited by the cooperation between the transmission protrusion and the transmission through-hole. 3. The continuous polishing process of ultra-thin knife mesh according to claim 2, characterized in that: each of the transmission protrusions is arched along the radial direction of the transmission roller, and can be inserted into the corresponding Transmission perforations, wherein the outer end surface of each transmission protrusion is spherical. 4. The continuous polishing process of ultra-thin knife mesh according to claim 3, characterized in that: the height of the arch of the transmission protrusion is less than or equal to the thickness of the metal sheet. 5. The continuous polishing process of ultra-thin knife mesh according to claim 1, characterized in that: in S1, limited collars are provided at both ends of each transmission roller, wherein the same transmission roller is The distance between the limiting collars on the roller is equal to the width of the metal sheet, and the limiting collars located at the same end between the plurality of conveying rollers are aligned and arranged. 6. The continuous polishing process of ultra-thin knife nets according to claim 5, characterized in that the limiting collar can be slidably adjusted along the length direction of the corresponding conveying roller. 7. The continuous polishing process of ultra-thin knife mesh according to claim 1, characterized in that: in S1, there are three transmission rollers, and in the orthographic projection of the axis of the transmission roller, the three transmission rollers The center lines of the rollers form an isosceles triangle, and the grinding wheel is located directly above the transmission roller corresponding to the vertex of the isosceles triangle. 8. The continuous polishing process of ultra-thin knife mesh according to claim 7, characterized in that: the line connecting the two rotation centers and the vertical line from the apex to the base of the isosceles triangle are perpendicular to each other. 9. The continuous polishing process of ultra-thin knife mesh according to claim 7, characterized in that: the arc length of the winding section formed by the metal sheet wound on each conveyor roller is 1 corresponding to the circumference of the conveyor roller. /5～1/2. 10. The continuous polishing process of ultra-thin knife mesh according to claim 1, characterized in that: the thickness of the metal sheet is 0.01-0.1 mm; and/or, the surface to be polished is on the metal sheet. The length direction of the material is evenly spaced, and during the grinding of S2, the winding speed and the unwinding speed remain unchanged.