CN116100421A - Preparation method and application of a calender roll with high surface precision - Google Patents

Abstract

The invention provides a preparation method and application of a calender roll with high surface precision, which belongs to the field of photovoltaic technology; in the invention, a slotted grinding wheel is used to slot the roll, and the slotted grinding wheel is corrected in real time while slotting, so that During the grooving process, the grooving grinding wheel can maintain a small chamfer angle and a smooth side surface, so that the groove vertex angle and side surface meet the requirements of small chamfer and roughness; the method prepared There are multiple grooves on the calender roll with small chamfers, which can be used to prepare multiple welding strips at the same time, effectively improving the preparation speed of welding strips.

Description

Preparation method and application of a calender roll with high surface precision

technical field

The invention belongs to the technical field of photovoltaics, and in particular relates to a preparation method and application of a calender roll with high surface precision.

Background technique

At present, the production process of the triangular welding belt is mainly the preparation of the wire drawing die and the extrusion preparation of the triangular grooved pressure roller. Although the wire drawing die can prepare triangular welding strips, this method cannot guarantee that the apex angle R of the triangular metal wire is less than 0.01mm, and the R angle of the triangular metal wire will not be very sharp, and arc chamfering will appear. In addition, the resistance required in the wire drawing process is less than the tensile limit of the metal wire itself, but on extremely thin metal wires, the tensile limit is very low, and it is easy to break the wire. Triangular grooving roller extrusion to form a triangular ribbon can get two sharper small chamfered corners, but because the roll is directly grooved, the small chamfered V-shaped groove cannot be opened, so there will be another top corner chamfer Bigger problem. Moreover, in this method, the triangular groove is processed by a turning tool or a grinding wheel. If the groove width is too small, the processed surface cannot be polished, and the two sides of the triangular welding ribbon will be very rough and cannot be smoothed.

In addition, in the prior art, the method of forming triangular welding ribbon by triangular grooved pressure roller extrusion is relatively slow. Although the above problems can be solved by splicing rolls, it is impossible to guarantee the accuracy of multiple rollers due to the high splicing precision requirements. During the splicing process, there is no gap, and it is impossible to maintain concentricity during the splicing process of several or more rollers, so it is impossible to splice multiple rollers to form multiple V-shaped grooves. Therefore, it is necessary to provide a preparation method of a high-precision small-chamfer rolling roll to solve the problem that the roll groove chamfer is too large, the groove surface is not smooth, and it cannot be applied to the simultaneous pressing of multiple triangular welding strips.

Contents of the invention

Aiming at the deficiencies in the prior art, the present invention provides a preparation method and application of a calender roll with high surface precision; in the present invention, a grooved grinding wheel is used to groove the roll, and the grooved grinding wheel is grooved in real time while grooving. Correction, so that in the slotting process, the slotted grinding wheel can maintain a small chamfer angle and a smooth side surface, so that the groove top angle and side surface meet the small chamfer and roughness requirements; the method The prepared calender roll with small chamfers is provided with a plurality of grooves, which can be used to prepare multiple welding ribbons at the same time, thereby effectively improving the preparation speed of the welding ribbons.

The present invention at first provides a kind of preparation method of the calender roll of high surface precision, specifically comprises the following steps:

The grooved grinding wheel is used to groove the roll, and the correction device is used to correct the grooved grinding wheel in real time during the grooved process, so as to ensure that the cutting edge of the grooved grinding wheel is always kept sharp, and high surface accuracy with grooves is obtained after the groove is completed. calender rolls.

Preferably, the mesh of the grooved grinding wheel is 800-2000.

Preferably, the correction device is arranged on the back side of the processing position of the grooved grinding wheel, and is kept in close contact with the grooved grinding wheel for real-time correction.

Preferably, the correcting device comprises a correcting grinding wheel or a grinding wheel dresser.

Preferably, the mesh number of the correction grinding wheel is 800-2000 and the mesh number of the correction grinding wheel is not less than the mesh number of the grooved grinding wheel.

Preferably, during the preparation process of the calender roll, the step of grooving is repeated to obtain a calender roll with multiple grooves and high surface precision.

Preferably, the groove structure is adjusted as required.

The present invention also provides the application of the calender roll with high surface precision prepared by the above method to prepare welding strip with high surface precision.

Preferably, the high-surface-precision welding strips include triangular welding strips with small chamfers and polygonal welding strips with smooth surfaces.

The present invention also provides a method for preparing a welding strip with high surface precision. The method is to use the calender roll with high surface precision to extrude to form the welding strip with high surface precision.

Compared with prior art, the beneficial effect of the present invention is:

The method described in the present invention corrects the worn part of the knife tip in real time by grinding the slotted grinding wheel, so as to ensure that the knife tip of the slotted grinding wheel remains sharp all the time, so that the opened groove meets the high-precision chamfering requirements. In addition, while grinding the groove, you can also choose to use a higher mesh grinding wheel to make the groove smooth and smooth, and the surface of the metal welding strip obtained by pressing is smooth and smooth.

In the present invention, by adding the online correction grinding wheel, the high-precision requirement of the groove structure can be guaranteed, and it is not necessary to consider that the groove is the wear at the tip of the grinding wheel. Moreover, the grooving method of the present invention can be replicated, and a plurality of grooves with the same size and high precision requirements can be continuously made on the same roller, so as to effectively increase the pressing speed of the welding strip.

The method of the present invention can roll out groove structures of various shapes, so as to produce other welding ribbons that require higher chamfering and surface precision, such as triangular welding ribbons with small chamfers and polygonal welding ribbons with smooth surfaces. In addition, the method for preparing calender rolls with high surface precision described in the present invention can prepare grooves and wires with apex angles R<0.01mm.

Compared with the wire drawing die method, the calender roll with high surface precision of the present invention will not cause the reflective layer on the ribbon to fall off when preparing the ribbon, and the grooves on the calender roll with high surface precision are suitable for any size The metal ribbon is not easy to break. In addition, the light energy reflected by the ribbon prepared by the method of the present invention is absorbed by the cell to the maximum extent, which can increase the output power of the photovoltaic module and is more suitable for solar cells.

Description of drawings

Fig. 1 is a schematic diagram of grooving of calender rolls with high surface precision according to the present invention.

Fig. 2 is a schematic diagram of pressing the welding strip with high surface precision according to the present invention.

Reference signs:

1-slotted grinding wheel; 2-correction device; 3-roller; 4-groove; 5-movable bearing; 6-welding belt; 7-straight roller shaft.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

Example 1:

In this embodiment, the preparation method of the present invention is explained by taking the preparation of a calender roll with high surface precision whose surface grooves are triangular grooves as an example, but the grooves obtained in the method of the present invention are not limited to triangular grooves , also includes other grooves that require higher chamfering and surface precision, such as small chamfering, smooth surface trapezoidal, rectangular, polygonal and other structures.

The specific preparation method of the calender roll with high surface precision whose surface groove is a triangular groove comprises the following steps:

As shown in Figure 1, two groups of emery wheels are set in the present embodiment, one group is used for roll 3 grooves, is grooved emery wheel 1, and another group is the correction emery wheel of grooved emery wheel, while roll 3 is grooved , use the correction grinding wheel to correct the grooved grinding wheel 1 in real time; the correction grinding wheel mainly corrects the worn corner of the grooved grinding wheel 1 and polishes the surface of the grinding wheel, so that the grooved grinding wheel 1 can maintain a small chamfer top during the slotting process. Angle and smooth side surface, so that the top angle and side surface of the groove can meet the requirements of small chamfer and roughness.

When grooving, grooves of different shapes can be opened by adjusting the inclination angle of the grooving grinding wheel. In this embodiment, the inclination angle of the grooving grinding wheel 1 is adjusted to obtain a triangular groove; then repeat the grooving step to obtain a groove with Calender rolls with high surface finish and multiple grooves.

In the specific implementation process, the higher the mesh number of the grooved grinding wheel 1, the easier it is to wear. By correcting the grooved grinding wheel 1 in real time, there is no need to worry about the wear of the grooved grinding wheel 1. Therefore, a grooved grinding wheel with a higher mesh number can be selected 1. In addition, the roughness of the correction grinding wheel determines the roughness of the grooved grinding wheel 1, and the roughness of the grooved grinding wheel 1 determines the roughness of the groove 4 of the roll 3, and the correction grinding wheel and the grooved grinding wheel 1 with a large mesh size can be selected. The smoothness of the grooves 4 of the roll 3 will be improved. The mesh number of the grooved grinding wheel 1 is 800-2000; the correction device 2 is arranged on the back side of the processing position of the grooved grinding wheel 1, and is kept close to the state of the grooved grinding wheel 1 for real-time correction; the mesh number of the corrected grinding wheel is 800~2000 and the mesh number of the corrected grinding wheel is greater than or equal to the mesh number of the grooved grinding wheel.

This embodiment also provides a method for preparing triangular welding strips by using the above-mentioned calender rolls with high surface precision whose surface grooves are triangular grooves, which specifically includes the following steps:

As shown in Figure 2, a straight roll shaft 7 without any grooves is placed on the calender roll with high surface precision with triangular grooves on the above-mentioned surface, and the straight roll shaft 7 is supported by a movable bearing 5 that can move up and down , the surface groove is a triangular groove, and the contact section of the calender roll with high surface precision and the straight roller shaft 7 forms a triangular groove. Straighten and tighten the welding ribbon and place it in the triangular groove of the calender roller with high surface precision, then adjust the movable bearing 5 to adjust the position of the straight roller shaft 7 until it fits with the calender roller with high surface precision, and press the ribbon 6 , to get the triangular ribbon. In the actual pressing process, the welding ribbon 6 cooperates with the calendering roller and the straight roller shaft 7 with high surface precision through the pay-off device, the tension tightening device and the wire device, so that the welding ribbon 6 is kept tight, straightened and running at the same speed as the roller. In the state where the axis speed is consistent, then the welding ribbon 6 enters the wire device or guide wheel with a fixed position, and then guides the welding ribbon 6 to the Rolling is carried out in the groove 4.

The described embodiment is a preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation, without departing from the essence of the present invention, any obvious improvement, replacement or modification that those skilled in the art can make Modifications all belong to the protection scope of the present invention.

Claims (10)

1. The preparation method of the high-surface-precision calendaring roller is characterized by comprising the following steps of:

the roller is grooved by the grooving grinding wheel, the grooving grinding wheel is corrected in real time by the correction device in the grooving process, the knife tip of the grooving grinding wheel is ensured to be always kept in a sharp state, and the high-surface-precision calendaring roller with grooves is obtained after grooving is finished.

2. The method for manufacturing a high-surface-precision calender roll according to claim 1, wherein the grooved grinding wheel has a mesh number of 800-2000.

3. The method for manufacturing a high-surface-precision calender roll according to claim 1, wherein the correction device is arranged on the back surface of the grooving grinding wheel processing position, and the state of being closely attached to the grooving grinding wheel is maintained for real-time correction.

4. The method of producing a high surface accuracy calender roll according to claim 1, wherein the dressing device includes a dressing wheel or a wheel dresser.

5. The method for manufacturing a high-surface-precision calender roll according to claim 4, wherein the number of the corrective grinding wheels is 800 to 2000 and the number of the corrective grinding wheels is not less than the number of the grooved grinding wheels.

6. The method for producing a high-surface-precision calender roll according to claim 1, wherein the grooving step is repeated during the production of the calender roll to obtain a high-surface-precision calender roll having a plurality of grooves.

7. The method of manufacturing a high surface accuracy calender roll according to claim 1, wherein the groove structure is adjusted as needed.

8. The use of a high surface precision calender roll prepared by the method of any one of claims 1-7 to prepare a high surface precision solder strip.

9. The use of claim 8, wherein the high surface precision solder strips include small chamfer triangular solder strips and smooth surfaced polygonal solder strips.

10. A method for preparing a high-surface-precision solder strip, which is characterized in that the high-surface-precision solder strip is formed by extrusion of a high-surface-precision calender roll prepared by the method according to any one of claims 1-7.

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