Front pretensioning wheel and pretensioning device by adding operating stations

Abstract

The present invention provides a pre-tensioning wheel and a pre-tensioning device by adding an operating station, belonging to the field of photovoltaic cell manufacturing technology. It includes an adjustment seat for connecting to a cutting workbench, the adjustment seat is provided with a plurality of upper and lower adjustment grooves parallel to each other and a plurality of left and right adjustment grooves parallel to each other, the upper and lower adjustment grooves are vertically arranged, and the left and right adjustment grooves are horizontally arranged, and a tensioning wheel is rotatably connected to the adjustment seat, and a plurality of tensioning grooves evenly spaced and annular are arranged on the outer wall of the tensioning wheel. The present invention can be installed in an existing device, has the advantage of occupying a small space, brings a stable processing effect while the size of the processed workpiece changes, and reduces the scrap rate of the processed finished crystal rod.

Description

Technical Field

[0001] The invention belongs to the technical field of photovoltaic cell manufacturing, and relates to a front pretensioning wheel and a pretensioning device by adding an operating station. Background Art

[0002] With the continuous improvement of the polycrystalline ingot casting process, the current polycrystalline silicon ingot size has changed from the original 5X5 to 6X6 and 7X7, which poses a sufficient challenge to the back-end squaring processing capabilities. The ingot size has changed from G5 to G6 and even to G7. The shape and size of the polycrystalline ingot have changed. For the change in the size of the polycrystalline ingot, the existing equipment has caused the loss of processed finished products due to the local tension difference. The existing squaring equipment processing technology cannot meet the needs of G6 and G7. Summary of the invention

[0003] The purpose of the present invention is to provide a front pretensioner wheel in view of the above problems.

[0004] Another object of the present invention is to provide a pre-expansion device by increasing the operating stations.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A front pre-tensioning wheel comprises an adjustment seat for connecting to a cutting workbench, the adjustment seat is provided with a plurality of upper and lower adjustment grooves parallel to each other and a plurality of left and right adjustment grooves parallel to each other, the upper and lower adjustment grooves are vertically arranged, and the left and right adjustment grooves are horizontally arranged, a tensioning wheel is rotatably connected to the adjustment seat, and a plurality of evenly spaced and annular tensioning grooves are arranged on the outer wall of the tensioning wheel.

[0007] Furthermore, the adjustment seat includes an upper and lower adjustment frame for connecting to the cutting workbench, the upper and lower adjustment grooves and the left and right adjustment grooves are located on the upper and lower adjustment frame, and also includes a left and right adjustment frame, the left and right adjustment frame is connected to the upper and lower adjustment frame by bolts inserted into the left and right adjustment grooves, and the tensioning wheel is rotatably connected to the left and right adjustment frame.

[0008] Furthermore, the cross-sections of the upper and lower adjustment frames and the left and right adjustment frames are both L-shaped, and the upper and lower adjustment frames are also provided with right-angled reinforcing angle irons, and the upper and lower adjustment grooves and the left and right adjustment grooves are respectively arranged along the reinforcing angle irons in a mirror-symmetrical manner.

[0009] Furthermore, the tensioning wheel includes a core shaft fixedly connected to the left and right adjustment frames, and two angular contact bearings arranged back to back are sleeved on the core shaft. The angular contact bearings are connected to the bearing box and the wire pressing wheel in sequence, and the tensioning groove is located on the outer wall of the wire pressing wheel.

[0010] A pretensioning device by adding an operating station is characterized in that it includes a cutting workbench, on which four front pretensioning wheels are arranged, and every two front pretensioning wheels form a group, and the two front pretensioning wheels in each group of front pretensioning wheels are arranged diagonally and the planes where the tensioning wheels in the two front pretensioning wheels are located are parallel, and the planes where the tensioning wheels in the two groups of front pretensioning wheels are located are perpendicular to each other.

[0011] Furthermore, four front pre-tensioning wheels are located at two opposite corners of the cutting workbench and each corner corresponds to two front pre-tensioning wheels. The planes on which the tensioning wheels on the two front pre-tensioning wheels are located are perpendicular to each other, and the bottoms of the tensioning wheels on the four front pre-tensioning wheels extend out of the bottom of the cutting workbench respectively.

[0012] Furthermore, each tensioning wheel has a guide wheel on both sides respectively, and the cutting wire is wound around the guide wheel and the tensioning wheel.

[0013] Furthermore, the guide wheel is parallel to the plane where the corresponding tension wheel is located, and the horizontal height of the bottom of the guide wheel is higher than the horizontal height of the bottom of the corresponding tension wheel.

[0014] Furthermore, the cutting workbench includes a cutting table, on which four rectangular fixed plates are fixed, the front pre-tensioning wheels are connected to the fixed plates through an adjusting seat, each fixed plate corresponds to a cutting shaft rotatably connected to the cutting table, and a plurality of cutting wheels are evenly fixed on the cutting shaft, and the two tensioning wheels in each group of front pre-tensioning wheels respectively correspond to one of the cutting wheels on the two opposite cutting shafts.

[0015] Furthermore, the two tensioning wheels in each group of front pre-tensioning wheels correspond to a cutting wheel located at the end portion of the two cutting shafts respectively.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] 1. The front pretensioning wheel can be installed in the existing device, which has the advantage of small space occupation. While the size of the workpiece changes, it brings stable processing effect, reduces the scrap rate of the finished crystal rod, better meets the production requirements and reduces the manufacturing cost of the crystal block.

[0018] 2. The pre-expansion device plays a role of tension pre-tightening in the initial stage of the cutting wire mesh, increasing the overall tension of the wire mesh. While the size of the multi-crystalline ingot changes, it also plays a role in stabilizing the cutting and reducing the loss of finished products caused by local tension differences.

[0019] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the pre-expansion device of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the pre-expansion device of the present invention;

[0022] Figure 3 It is a three-dimensional schematic diagram of the front pretensioner of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the front pretensioner wheel of the present invention;

[0024] Figure 5 It is another structural schematic diagram of the pre-expansion device of the present invention;

[0025] Figure 6 It is a working principle diagram of the present invention.

[0026] In the figure: adjusting seat 1, upper and lower adjusting slots 2, left and right adjusting slots 3, tensioning wheel 4, tensioning slots 5, upper and lower adjusting frames 6, left and right adjusting frames 7, reinforcing angle irons 8, mandrels 9, angular contact bearings 10, bearing boxes 11, wire pressing wheels 12, cutting work tables 13, front pre-tensioning wheels 14, guide wheels 15, cutting wires 16, cutting tables 17, fixing plates 18, cutting shafts 19, cutting wheels 20,. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Example 1

[0029] like Figure 3 As shown, a front pre-tensioning wheel comprises an adjustment seat 1 for connecting to a cutting workbench, the adjustment seat 1 is provided with a plurality of upper and lower adjustment grooves 2 and a plurality of left and right adjustment grooves 3 which are parallel to each other, the upper and lower adjustment grooves 2 are vertically arranged, the left and right adjustment grooves 3 are horizontally arranged, the upper and lower adjustment grooves 2 and the left and right adjustment grooves 3 are respectively strip-shaped, and bolts can be inserted therein, a tensioning wheel 4 is rotatably connected to the adjustment seat 1, the outer wall of the tensioning wheel 4 is provided with a plurality of evenly spaced and annular tensioning grooves 5, the bottom of the tensioning groove 5 is arc-shaped, and the width of the tensioning groove 5 gradually decreases from the top to the bottom.

[0030] When the metal wire on the cutting workbench is pulled through to form a grid-like cutting wire net, the tensioning wheel 4 can be pressed on the metal wire at the wire inlet and wire outlet to apply a constant pressure to the wire net, thereby playing a tensile pre-tightening role, increasing the overall tension of the wire net, and stabilizing the cutting for changes in the size of the polycrystalline ingot, thereby reducing the loss of finished products caused by local tension differences.

[0031] In this embodiment, the adjustment seat 1 includes an upper and lower adjustment frame 6 and a left and right adjustment frame 7 that are detachably connected, wherein the upper and lower adjustment frame 6 is used to connect to the cutting workbench, the upper and lower adjustment grooves 2 and the left and right adjustment grooves 3 are located on the upper and lower adjustment frame 6, and the bolts pass through the upper and lower adjustment grooves 2 and are connected to the cutting workbench. Through the upper and lower adjustment grooves 2, the vertical height of the upper and lower adjustment frame 6 can be adjusted.

[0032] The left and right adjustment frame 7 is inserted into the left and right adjustment slots 3 and connected to the upper and lower adjustment frame 6 by bolts, and the tension wheel 4 is rotatably connected to the left and right adjustment frame 7. The positional relationship between the left and right adjustment frame 7 and the upper and lower adjustment frame 6 can be adjusted through the left and right adjustment slots 3, thereby adjusting the position of the tension wheel 4. Bolt holes are provided in the left and right adjustment frame 7, and bolts are inserted into the bolt holes and then pass through the left and right adjustment slots 3.

[0033] The cross-sections of the upper and lower adjustment frames 6 and the left and right adjustment frames 7 are both L-shaped. The upper and lower adjustment frames 6 are also provided with right-angled reinforcing angle irons 8. The upper and lower adjustment grooves 2 and the left and right adjustment grooves 3 are respectively arranged in mirror symmetry along the reinforcing angle irons 8 to form symmetrical fastening, thereby maintaining the stability of the connection.

[0034] The tension wheel 4 can directly adopt a wheel structure, but this structure has poor stability. Figure 4 As shown, the tensioning wheel 4 includes a mandrel 9 fixedly connected to the left and right adjustment frames 7, the mandrel 9 is fixedly connected to the left and right adjustment frames 7 through an effect, and two angular contact bearings 10 arranged back to back are sleeved on the mandrel 9, and the angular contact bearings 10 are provided with bearing end covers on the outer sleeve, and the angular contact bearings 10 are sequentially connected to the bearing box 11 and the wire pressing wheel 12 outside, and the tensioning groove 5 is located on the outer wall of the wire pressing wheel 12. There are multiple tensioning grooves 5, which are circular, so as to facilitate the adjustment of the direction of the metal wire.

[0035] The cutting wire mesh is in a criss-cross grid shape. In the specific implementation, a tensioning wheel 4 is respectively arranged on the four outermost side lines (metal wires) of the cutting wire mesh to tension the metal wires, thereby playing a tensile pre-tightening role, increasing the overall tension of the wire mesh, and playing a stabilizing cutting role for the change in the size of the polycrystalline ingot, thereby reducing the loss of processed products due to local tension differences.

[0036] Example 2

[0037] This embodiment adopts the front pretensioning wheel of Example 1, and provides a pretensioning device by adding an operating station.

[0038] like Figure 1As shown, it includes a cutting workbench 13, on which four front pre-tensioning wheels 14 are arranged, and every two front pre-tensioning wheels 14 form a group, and the two front pre-tensioning wheels 14 in each group of front pre-tensioning wheels 14 are arranged diagonally and the planes where the tensioning wheels 4 in the two front pre-tensioning wheels 14 are located are parallel, and the planes where the tensioning wheels 4 in the two groups of front pre-tensioning wheels 14 are located are perpendicular to each other.

[0039] That is, each set of front pre-tensioning wheels 14 realizes pre-tensioning effect on the inlet and outlet ends. Since the cutting wire is in a rectangular grid shape during operation, the two sets of front pre-tensioning wheels 14 form a pre-tensioning effect on the four sides of the cutting wire. The original tension of the steel wire is relaxed, and the tension of the cutting steel wire at the inlet and outlet ends is increased, thereby meeting the tension effect of the steel wire at different positions. While the size of the workpiece changes, a stable processing effect is brought.

[0040] Specifically, the four front pre-tensioning wheels 14 are located at two opposite corners of the cutting workbench 13 and each corner corresponds to two front pre-tensioning wheels 14. The planes on which the tensioning wheels 4 on the two front pre-tensioning wheels 14 are located are perpendicular to each other, and the bottoms of the tensioning wheels 4 on the four front pre-tensioning wheels 14 extend out of the bottom of the cutting workbench 13 respectively.

[0041] That is to say, four front pretensioning wheels 14 are centrally arranged on two diagonal portions of the cutting table 13, so that the structure is more compact. The bottom of the tensioning wheel 4 is lower than the bottom of the cutting table 13, so that the tensioning wheel 4 can achieve the effect of pressing down on the cutting wire.

[0042] Combination Figure 2 and Figure 5 As shown, there is a guide wheel 15 on each side of each tensioning wheel 4, and the cutting wire 16 is wound around the guide wheel 15 and the tensioning wheel 4. The horizontal height of the bottom of the guide wheel 15 is higher than the horizontal height of the bottom of the tensioning wheel 4, and the tensioning wheel 4 realizes a tensioning effect on the cutting wire 16.

[0043] The guide wheel 15 is parallel to the plane where the corresponding tension wheel 4 is located, and the horizontal height of the bottom of the guide wheel 15 is higher than the horizontal height of the bottom of the corresponding tension wheel 4. Since the tension wheel 4 is provided with a plurality of tensioning grooves 5, the tensioning grooves 5 are used to adjust the coordination with the guide wheel 15 so that the cutting wire 16 is in a straight line between the guide wheel and the tension wheel 4. The guide wheel 15 can be arranged on the cutting workbench 13 and is rotatably connected to the cutting workbench 13.

[0044] In this embodiment, the cutting workbench 13 includes a cutting table 17 , on which four rectangular fixing plates 18 are fixed, forming a rectangular cutting cavity in the middle for placing the crystal ingot.

[0045] The front pre-tensioning wheel 14 is connected to the fixed plate 18 through the adjustment seat 1. Each fixed plate 18 corresponds to a cutting shaft 19 rotatably connected to the cutting table 17. A plurality of cutting wheels 20 are evenly fixed on the cutting shaft 19. The two tensioning wheels 4 in each group of front pre-tensioning wheels 14 correspond to one of the cutting wheels 20 on the two opposite cutting shafts 19 respectively.

[0046] The two tensioning wheels 4 in each group of front pre-tensioning wheels 14 correspond to a cutting wheel 20 located at the end of the two cutting shafts 19 respectively.

[0047] It should be noted that, in the present embodiment, each set of front pre-tensioning wheels 14 corresponds to two parallel cutting shafts 19, and the two tensioning wheels 4 on each set of front pre-tensioning wheels 14 correspond to the cutting wheels 20 at the ends of the two cutting shafts 19. The two cutting wheels 20 are not on the same plane, but are arranged diagonally, that is, the positions of the incoming and outgoing ends correspond exactly to the two tensioning wheels 4, thereby achieving tensioning of the incoming and outgoing ends of the cutting wire 16.

[0048] The working principle of the present invention is:

[0049] Combination Figure 6 As shown, the cutting wire 16 passes through the cutting wheel 20 on the cutting shaft 19, and is spread all over the wire mesh in a cross manner to obtain a rectangular cutting mesh wire. Through the upper and lower adjustment slots 2 and the left and right adjustment slots 3, the position of the adjustment seat 1 is adjusted according to the requirements of the process settings using the measuring tool. The four cutting wires 16 on the edge of the cutting mesh wire are placed on the wire pressing wheel 12 of the tensioning wheel 4 through the guide wheel 15, and the ingot 100 is placed in the cutting workbench 13, and the crystal support 101 is connected to the bottom of the ingot 100. After the adjustment is completed, the size of the workpiece for processing polycrystalline incoming materials can be ignored, stable cutting maintains good operating stability, the lateral tension is extended evenly, and the metal deformation resistance of the steel wire is reduced.

[0050] The present invention uses a front pre-tensioning wheel to improve the existing straight line wiring tension and position offset problems, so that friction is formed between the cutting wheel and the cutting wire. Since the friction is proportional to the positive pressure, the steel cutting wire is in a relaxed state with the original tension, and the tension of the steel wire at the inlet and outlet ends is increased, thereby meeting the tension effect of the steel wire at different positions. The improved device occupies a smaller space, brings a stable processing effect while the size of the processed workpiece changes, reduces the scrap rate of the processed finished crystal rod, better meets the production requirements and reduces the manufacturing cost of the crystal block. The device of the present invention is used to improve the processing capacity of the G6 and G7 diamond wire squaring equipment.

[0051] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the spirit of the present invention.

Claims

1. A pre-expansion device by adding an operating station, characterized in that: The invention comprises a cutting workbench (13), on which four front pre-tensioning wheels (14) are arranged, the front pre-tensioning wheels (14) comprising an adjustment seat (1) for connecting with the cutting workbench, the adjustment seat (1) being provided with a plurality of upper and lower adjustment grooves (2) and a plurality of left and right adjustment grooves (3) which are parallel to each other, the upper and lower adjustment grooves (2) being arranged vertically, and the left and right adjustment grooves (3) being arranged horizontally, the adjustment seat (1) being rotatably connected with a tensioning wheel (4), and the outer wall of the tensioning wheel (4) being provided with a plurality of evenly spaced and annular tensioning grooves (5); Every two front pre-tensioning wheels (14) form a group, the two front pre-tensioning wheels (14) in each group of front pre-tensioning wheels (14) are arranged diagonally and the planes on which the tensioning wheels (4) in the two front pre-tensioning wheels (14) are located are parallel, and the planes on which the tensioning wheels (4) in the two groups of front pre-tensioning wheels (14) are located are perpendicular to each other; the four front pre-tensioning wheels (14) are located at two opposite corners of the cutting workbench (13) and each corner corresponds to two front pre-tensioning wheels (14), the planes on which the tensioning wheels (4) on the two front pre-tensioning wheels (14) are located are perpendicular to each other, and the bottoms of the tensioning wheels (4) on the four front pre-tensioning wheels (14) respectively extend out of the bottom of the cutting workbench (13); Each tension wheel (4) has a guide wheel (15) on both sides thereof, and a cutting wire (16) is wound around the guide wheel (15) and the tension wheel (4).

2. The pre-expansion device according to claim 1, characterized in that: The adjustment seat (1) comprises an upper and lower adjustment frame (6) for connecting to the cutting workbench, the upper and lower adjustment grooves (2) and the left and right adjustment grooves (3) are located on the upper and lower adjustment frame (6), and also comprises a left and right adjustment frame (7), the left and right adjustment frame (7) is connected to the upper and lower adjustment frame (6) by inserting bolts into the left and right adjustment grooves (3), and the tensioning wheel (4) is rotatably connected to the left and right adjustment frame (7).

3. The pre-expansion device according to claim 2, characterized in that: The cross-sections of the upper and lower adjustment frames (6) and the left and right adjustment frames (7) are both L-shaped. A right-angled reinforcing angle iron (8) is also provided on the upper and lower adjustment frames (6). The upper and lower adjustment grooves (2) and the left and right adjustment grooves (3) are respectively arranged along the reinforcing angle iron (8) in a mirror-symmetrical manner.

4. The pre-expansion device according to claim 2, characterized in that: The tensioning wheel (4) comprises a core shaft (9) fixedly connected to the left and right adjustment frames (7); two angular contact bearings (10) arranged back to back are sleeved on the core shaft (9); a bearing box (11) and a wire pressing wheel (12) are connected to the outside of the angular contact bearings (10) in sequence; and the tensioning groove (5) is located on the outer wall of the wire pressing wheel (12).

5. The pre-expansion device according to claim 1, characterized in that: The guide wheel (15) is parallel to the plane where the corresponding tension wheel (4) is located, and the horizontal height of the bottom of the guide wheel (15) is higher than the horizontal height of the bottom of the corresponding tension wheel (4).

6. The pre-expansion device according to claim 1, characterized in that: The cutting workbench (13) comprises a cutting table (17), on which four rectangular fixed plates (18) are fixed, and the front pre-tensioning wheels (14) are connected to the fixed plates (18) via an adjustment seat (1), each fixed plate (18) corresponds to a cutting shaft (19) rotatably connected to the cutting table (17), and a plurality of cutting wheels (20) are evenly spaced and fixed on the cutting shaft (19), and the two tensioning wheels (4) in each group of front pre-tensioning wheels (14) respectively correspond to one of the cutting wheels (20) on the two opposite cutting shafts (19).

7. The pre-expansion device according to claim 6, characterized in that: The two tension wheels (4) in each group of front pretension wheels (14) correspond to a cutting wheel (20) located at the end portions of the two cutting shafts (19), respectively.

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