CN215882140U

CN215882140U - Main roller and cutting equipment

Info

Publication number: CN215882140U
Application number: CN202022731466.2U
Authority: CN
Inventors: 毛剑波; 李�杰; 刘晓东; 管辉
Original assignee: Longi Green Energy Technology Co Ltd
Current assignee: Longi Green Energy Technology Co Ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2022-02-22
Anticipated expiration: 2030-11-23

Abstract

The utility model discloses a main roller and cutting equipment, relates to the technical field of photovoltaic device manufacturing equipment, and aims to solve the problems of short service life and low processing efficiency of the main roller in the conventional cutting equipment. The main roller comprises a roller core, a first structural layer and a first coating layer, wherein the first structural layer is arranged on the roller core, a plurality of spaced first annular grooves are formed in the surface, away from the roller core, of the first structural layer, the first coating layer is at least formed on the inner wall of each first annular groove, and the hardness of the first coating layer is smaller than that of the first structural layer. The cutting equipment comprises the main roller provided by the technical scheme.

Description

Main roller and cutting equipment

Technical Field

The utility model relates to the technical field of photovoltaic device manufacturing equipment, in particular to a main roller and cutting equipment.

Background

In the existing silicon slicing technology, a multi-wire cutting technology is mostly adopted, a liftable crystal support and at least two main rollers are arranged in a multi-wire cutting machine, a silicon rod workpiece is connected below the crystal support, a groove for positioning a cutting wire is arranged on the periphery of each main roller, the cutting wire is wound in the groove, a silicon rod subjected to primary processing is driven by the crystal support to reciprocate up and down, the main rollers drive the cutting wire to reciprocate on the other hand, and the silicon rod is made into a proper silicon wafer by matching the crystal support and the cutting wire.

At present, a main roller system used in multi-wire cutting comprises a roller core and a coating layer coated on the outer surface of the roller core, and after the coating layer is formed, a preset groove type is machined on the surface of the coating layer through turning. The production process of the coating layer has the defects of high technical requirement, long time, high energy consumption, high cost and the like. The grooving process is long in processing time, the groove shape is difficult to control, eccentric wear is easily caused during use, and the service life of the main roller is shortened. After a certain service life, the coating on the main roller needs to be removed, so that the waste of the coating is large, the processing period is long, and the production cost of the solar silicon wafer is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a main roller and cutting equipment, which are used for solving the problems of short service life and low processing efficiency of the main roller in the existing cutting equipment.

In a first aspect, the present invention provides a main roller for use in a cutting apparatus. The main roller comprises a roller core, a first structural layer and a first coating layer, wherein the first structural layer is arranged on the roller core, a plurality of spaced first annular grooves are formed in the surface, away from the roller core, of the first structural layer, the first coating layer is at least formed on the inner wall of each first annular groove, and the hardness of the first coating layer is smaller than that of the first structural layer.

With the adoption of the technical scheme, the main roller provided by the embodiment of the utility model has the advantages that the plurality of first annular grooves are arranged on the first structural layer with the hardness larger than that of the first coating layer in advance, and the first coating layer is formed on the first annular grooves, so that the processing precision of the second annular grooves formed by the first coating layer is high, and the processing time is short. Therefore, the processing efficiency of the main roller is improved, meanwhile, the material consumption of the first coating layer required by updating the first coating layer every time is less, and the cutting cost is reduced. The first coating layer is formed on the first annular groove with higher hardness, and the surface of the first coating layer is smoother, so that the flatness of the second annular groove is better, and the abrasion between the first coating layer and the cutting line is reduced. That is, the service life of the first coating layer is improved, and thus the service life of the main roller is improved.

In one possible implementation, the first structural layer is a rigid structural layer. The first rigid structural layer can be machined, the difficulty in machining the first annular groove is low, and the first annular groove in the first structural layer can be formed with high precision. So that the first coating layer formed on the first annular groove can form the second annular groove with high accuracy.

In one possible implementation, the first structural layer is composed of any one of a metal, a metal alloy, a carbon fiber, or a carbon-carbon composite.

In one possible implementation, the first structural layer has a thickness of 2 mm to 50 mm. Excessive thickness can result in unnecessary cost input, and excessive thinness is not conducive to processing and installation.

In one possible implementation, the first coating layer is formed on a surface of the first structural layer remote from the roll core. The first coating layer may be completely covered on the surface of the first structural layer, and the process of forming the first coating layer is simpler.

In one possible implementation manner, the material of the first coating layer includes any one of polyurethane and polytetrafluoroethylene.

In one possible implementation, the thickness of the first coating layer is 5-200 microns.

In one possible implementation, the first structural layer is removably attached to the roll core. When the first structural layer of the main roller needs to be replaced, the first structural layer is only required to be detached from the roller core for replacement, then the groove type is processed according to new requirements, and the first coating layer is sprayed.

In one possible implementation, the first structural layer is connected to the roll core by at least one of a snap fit, a threaded fit, an interference fit, or a rivet.

In a second aspect, an embodiment of the present invention further provides a cutting apparatus. The cutting device comprises the main roller described in the first aspect or any one of the possible implementations of the first aspect.

The beneficial effects of the cutting device provided by the second aspect are the same as the beneficial effects of the main roller described in the first aspect or any possible implementation manner of the first aspect, and are not described herein again.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 to 4 are schematic structural views of a main roller according to an embodiment of the present invention.

Reference numerals:

1-a roll core, 2-a first structural layer, 21-a first annular groove,

3-first coating layer, 31-second annular groove, 4-support.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Cutting equipment, such as multi-wire cutting equipment, is important production equipment for producing photovoltaic cells or chips. Silicon wafers are formed by cutting silicon rods and are used as substrates for preparing photovoltaic modules or semiconductor devices.

The multi-wire cutting equipment needs to adopt a main roller to fix a cutting wire, and the main roller is provided with a groove for positioning the cutting wire so as to ensure that the cutting wire cannot deviate from a preset position in the cutting process. In the cutting process of the silicon rod, the cutting amount needs to be strictly controlled, and the cutting line deviates or shakes, so that the cutting edge is too large, and the cutting quality of the silicon wafer is affected.

The related art provides a main roller including a roller core and a coating layer on the roller core, the coating layer having grooves thereon. The groove is formed by forming the coating layer, and then forming a required groove on the surface of the coating layer by a mechanical processing mode, such as turning. The surface of the cutting line in contact with the groove needs to be smooth to prevent the cutting line and the groove from being worn. Therefore, the coating layer generally used for the main roller is mostly a high molecular polymer coating layer with better wear resistance, and can also contain a polymer compound or a mixture or a modified substance. The production process of the coating layer has the defects of high technical requirement, long time, high energy consumption, high cost and the like. Because the texture of the coating layer is soft, the processing time of the process of forming the groove on the coating layer is long, the shape of the groove is difficult to control, and the groove is difficult to be accurately processed. The improper groove machining can cause the eccentric wear of the cutting line easily during the use of the groove, so that the position of the eccentric wear of the coating layer and the cutting line is quickly abraded, and the service life of the main roller is shortened. After the coating on the main roller reaches a certain service life, the coating on the main roller needs to be turned off, and then a new coating is coated again and a groove is formed, so that the waste of the coating is large, the processing period is long, and the requirements of solar silicon wafer production on low cost are hindered.

In order to solve the above problems, embodiments of the present invention provide a cutting apparatus, which may include a main roller. The main roller solves the problems that the groove of the existing main roller is difficult to process, the processing precision of the groove on the main roller is insufficient, and the service life of the existing main roller is short.

Fig. 1 illustrates a structural view of a main roller according to the present invention. Referring to fig. 1, the main roller is applied to a cutting apparatus including a cutting line. The main roller comprises a roller core 1, a first structural layer 2 and a first coating layer 3, wherein the first structural layer 2 is arranged on the roller core 1, and a plurality of spaced first annular grooves 21 are formed on the surface, away from the roller core 1, of the first structural layer 2. The first coating layer 3 is formed at least on the inner wall of the first annular groove 21, and the hardness of the first structural layer 2 is greater than that of the first coating layer 3. Since the first coating layer 3 is formed on the inner wall of the first annular grooves 21, the portion of the first coating layer 3 located above each of the first annular grooves 21 has a plurality of second annular grooves 31 on the surface remote from the first structural layer 2, the second annular grooves 31 being for accommodating the dicing lines.

Fig. 2 illustrates a structural view of a main roller according to the present invention. Referring to fig. 2, the hardness of the first structural layer 2 is greater than that of the first coating layer 3, so that the accuracy of processing the groove on the first structural layer 2 is greater than that of processing the groove on the first coating layer 3, and the difficulty is less than that of processing the groove on the first coating layer 3. The first structural layer 2 may be a structural layer made of a rigid material, which is easier to machine and has higher machining precision. By machining the first annular groove 21 in the rigid first structural layer 2, the machining difficulty is reduced, and it is ensured that the first annular groove 21 in the first structural layer 2 can be formed with high precision. Therefore, the first coating layer 3 on the first annular groove 21 can form the second annular groove 31 with high precision, the cutting line can be fixed by the second annular groove 31, and the problem that the cutting line is eccentric and jittered in the cutting process is solved. The problem of eccentric wear in the second annular groove 31 does not occur during cutting on the basis of the cutting line. The wear of the first coating layer 3 thus results solely from the normal wear of the cutting wire, thereby increasing the service life of the main roller compared to the prior art main rollers.

Referring to fig. 2, the first structural layer 2 and the first annular groove 21 thereon may be formed by casting or other forming methods. As long as it is ensured that the first annular groove 21 can be formed with high precision on the first structural layer 2. The first annular groove 21 may be formed simultaneously with the formation of the first structural layer 2, or may be formed after the first structural layer 2 is formed and subjected to secondary processing. For example, the first structural layer 2 is made of stainless steel, and a plurality of first annular grooves 21 are formed in the first structural layer 2 by turning and grinding. The first structural layer 2 with the first annular groove 21 is formed, for example, by sand casting.

In one possible implementation, referring to fig. 1, the first structural layer 2 is composed of any one of a metal, a metal alloy, a carbon fiber, or a carbon-carbon composite.

For example, when the first structural layer 2 in the embodiment of the present invention is made of metal or metal alloy, it may be made of light alloy such as aluminum alloy, carbon steel, magnesium alloy, aluminum alloy, zinc alloy, titanium alloy, magnesium-aluminum alloy, or corresponding metal material. And the material can also be a novel rigid material such as carbon fiber or carbon-carbon composite material.

The thickness of the first structural layer 2 may be 2 mm to 50 mm, and the thickness of the first structural layer 2 is related to the diameter of the main roller and the diameter of the cutting line. Since the groove depth of the first annular groove 21 influences the thickness of the first structural layer 2, the first structural layer 2 needs to take into account the structural stability after the first annular groove 21 is machined. An excessively thick first structural layer 2 results in unnecessary cost input, and an excessively thin first structural layer 2 is disadvantageous to processing and mounting. The shape of the first annular groove 21 is not limited herein, and the cutting line can be stably received.

For example, the structure of the first annular groove 21 may be a continuous revolution structure or an annular structure of a continuous circular arc, triangle, rectangle or trapezoid cross section, based on the second annular groove 31 being formed on the inner wall of the first annular groove 21 by the first coating layer 3, and thus the shape of the second annular groove 31 is the same as the first annular groove 21.

Referring to fig. 3, the first coating layer 3 may be a thin layer structure formed on the first annular groove 21 by coating or spraying, and may have a thickness of 5 to 200 μm. The first annular groove 21 formed by high-precision machining forms a first coating layer 3 with uniform thickness on the surface of the first annular groove 21, and the second annular groove 31 is formed on the surface of the first coating layer 3 away from the first structural layer 2. The second annular groove 31 is intended to be in contact with the cutting line. Since the first annular groove 21 is formed by high-precision machining, the cutting line is in the second annular groove 31, and the eccentric wear phenomenon of the existing main roller does not occur, so that the service life of the first coating layer 3 is ensured, and the service life of the first coating layer is prolonged compared with that of the existing main roller.

The first coating layer 3 may form a continuous film layer completely covering the surface of the first structural layer 2 remote from the roll core 1. Or may cover only the inner wall of the first annular groove 21. This may be provided with reference to the groove spacing of the first annular groove 21 and the manner in which the first coating layer 3 is formed, and when the groove spacing is large, the use of only the first annular groove 21 can save the amount of the first coating layer 3. However, the first coating layer 3 is formed by spraying or coating, and the first structural layer 2 is covered on the whole surface, so that the first coating layer 3 is more convenient to form. Of course, when spraying or coating is used, it is also possible to form the first coating layer 3 discontinuously and only in the first annular groove 21 by masking the outside of the first structural layer 2.

The first coating layer 3 is made of a material with high wear resistance, and the wear rate of the first coating layer 3 is at least less than or equal to that of polyurethane. The material of the first coating layer may include any one of polyurethane and polytetrafluoroethylene. Meanwhile, the flatness of the surface of the first coating layer 3 is high, and the surface of the cutting line is smooth when the cutting line is accommodated in the second annular groove 31 by ensuring that the surface of the first coating layer 3 is smooth, so that the cutting line and the groove are prevented from being abraded.

For example, when first coating 3 adopts polyurethane to make, polyurethane film layer's thickness is greater than 5um and can guarantees that polyurethane film layer surface is smooth, and polyurethane film layer thickness is less than 200um and can guarantee that the cutting line holds in the recess, does not take place the skew, improves the precision of cutting, to the field of personnel, according to actual need, set up polyurethane film layer's thickness to 5um, 10um, 15um, 30um, 50um, 80um, 120um also in the protection scope of this application, this application does not limit to this. The material of the first coating layer 3 mainly considers the smoothness of the surface and the wear resistance, and does not consider the specific material. The coating can be a high molecular polymer film layer with better wear resistance, such as polyurethane and polytetrafluoroethylene, and can also be a compound or a mixture or a modified substance containing the polymer.

In practical application, when the first coating layer 3 needs to be replaced under normal use conditions, the main roller is soaked in the degumming agent to remove the first coating layer 3, and then the surface of the first structural layer 2 is coated with the first coating layer 3. The frequency and amount of replacement of the first coating layer 3 is lower than when the existing main roll is replaced.

In one possible implementation, referring to fig. 1, the first structural layer 2 is removably attached to the roll core 1. Since the cut thickness of the silicon wafer is not unique, the groove pitch of the first annular groove 21 is determined according to actual production, and thus various types of main rollers are required for silicon wafer cutting production. Meanwhile, after the first coating layer 3 of the main roller provided by the utility model is normally worn, the operation of replacing the first coating layer 3 is needed, and then the main roller needs to be detached from the cutting equipment. To reduce maintenance or replacement time of the main roll, the first structural layer 2 is removably attached to the roll core 1. When the main roller needs to be replaced or the first coating layer 3 needs to be sprayed again, the first structural layer 2 only needs to be detached from the roller core 1, and the first structural layer 2 with the first coating layer 3 needs to be replaced. Then during daily use, only a plurality of specifications of the first structural layer 2 need to be prepared for use and replaced if necessary. Thereby greatly reducing the time required for replacing the main roller or updating the first coating layer 3 and the investment of the roller core 1, and further reducing the cost and time required for cutting the silicon wafer.

For example, the first structural layer 2 can be fixed relative to the roll core 1 after being joined thereto. The first structural layer 2 may be connected to the roll core 1 by at least one of snapping, threading, interference fit or riveting. Or the glue can be bonded by glue, and degumming agent is adopted for soaking to degum when the disassembly is needed. The end face of the first structural layer 2 and the end face of the roll core 1 may be connected by a connecting assembly, such as a flange.

In one possible implementation, fig. 4 illustrates a structural diagram of a main roller provided by the present invention. Referring to fig. 4, the main roll further comprises a supporting member 4, the two ends of the roll core 1 are respectively provided with one supporting member 4, and the supporting members 4 are connected with the roll core 1. The support member 4 serves to support and position the main roller to prevent the main roller from being deviated. The main roller shift may cause the cutting line to shift in the second annular groove 31, and an eccentric wear of the cutting line with respect to the first coating layer 3 may occur.

For example, as shown in fig. 4, the support member 4 may have a conical structure to position the main roller, and two support members 4 with opposite conical angles may achieve the positioning effect.

According to the main roller provided by the embodiment of the utility model, the plurality of first annular grooves 21 are pre-arranged on the first structural layer 2 with the hardness greater than that of the first coating layer 3, and then the first coating layer 3 is formed on the first annular grooves 21, so that the second annular grooves 31 formed on the first coating layer 3 are high in processing precision and short in processing time. Thereby, the processing efficiency of the main roller is improved, and meanwhile, the material consumption required for updating the first coating layer 3 every time is less, and the maintenance cost of the main roller is reduced. The first coating layer 3 is formed on the first annular groove 21 having a greater hardness, and the surface of the first coating layer 3 is more flat, so that the flatness of the second annular groove 31 is better, and the abrasion between the first coating layer 3 and the cutting line is reduced. That is to say the service life of the first coating layer 3 and thus of the main roller.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The main roller is characterized by being applied to cutting equipment and comprising a roller core, a first structural layer and a first coating layer, wherein the first structural layer is arranged on the roller core, a plurality of spaced first annular grooves are formed in the surface, away from the roller core, of the first structural layer, the first coating layer is formed on the inner wall of each first annular groove, and the hardness of the first coating layer is smaller than that of the first structural layer.

2. The master roll of claim 1, wherein the first structural layer is a rigid structural layer.

3. The main roller of claim 2, wherein the material of the first structural layer comprises any one of a metal, a metal alloy, a carbon fiber, and a carbon-carbon composite material.

4. The master roll of claim 3, wherein the first structural layer has a thickness of 2 mm to 50 mm.

5. The master roll of claim 1, wherein the first coating layer is formed on a surface of the first structural layer distal from the roll core.

6. The main roller according to any one of claims 1 to 5, wherein the material of the first coating layer comprises any one of polyurethane and polytetrafluoroethylene.

7. The master roll of claim 6, wherein the first coating layer has a thickness of 5-200 microns.

8. The main roller according to any one of claims 1 to 5, wherein the first structural layer is detachably connected to the roller core.

9. The master roll of claim 8, wherein the first structural layer is coupled to the roll core by at least one of a snap fit, a threaded fit, an interference fit, or a rivet joint.

10. A cutting apparatus, characterized by comprising a main roller according to any one of claims 1 to 9.