Threading method and broken line processing method

Abstract

The invention relates to the field of multi-wire cutting machines, in particular to a threading method and a broken wire processing method. The method comprises the following steps that a diamond wire is clamped into a groove in one end of a guide piece; the diamond wire and the guide piece are welded, and the number of welding spots is two or more; the welding spots are annealed; after cooling, polishing the welding spot to enable the thickness of the welding end to be smaller than that of the guide piece; the guide piece penetrates through the saw kerf of the stone and drives the diamond wire to penetrate through the saw kerf of the stone. According to the threading method and the broken line processing method, the threading method is convenient and fast, and threading use of a long and thin gap can be met; the broken wire treatment method can be suitable for broken wire treatment of the diamond wire.

Description

Technical Field

[0001] The invention relates to the field of multi-wire cutting machines, in particular to a wire threading method and a wire breakage processing method. Background Art

[0002] Diamond wire multi-wire saws are widely used to cut silicon wafers, sapphire, graphite, and magnetic materials. With the deepening of research and development, diamond wire multi-wire saws have been applied to stone cutting. Multi-wire saws mainly include cutting devices used to cut stone.

[0003] CN115946239A discloses a cutting device and a multi-wire cutting machine for a large stone slab, which mainly include a frame, on which four square-distributed main wheels are provided, and on the left and right sides of the frame, respectively, reel-and-reel systems are provided. After the diamond wire comes out of one set of reel-and-reel systems, it is repeatedly spirally wound on the wire grooves of the four main wheels, and finally the wire ends are connected to another set of reel-and-reel systems. In this way, the diamond wire can form a cutting mesh for cutting stone between the two main wheels on the lower layer. In the process of repeated forward and reverse rotation of the four main wheels, the cutting mesh repeatedly saws the stone until the stone is cut, and during the cutting process, one set of reel-and-reel systems is used to pay out the wires and continuously provide new diamond wires to the main wheels, and the other set of reel-and-reel systems continuously reel in the wires to collect the damaged diamond wires into a roll.

[0004] When cutting large materials, such as large stone blocks, when the height of the stone exceeds 1 meter, the saw kerf of the diamond wire is very small. For example, the diameter of the diamond wire is 0.5mm, and the actual cutting kerf is 0.5-0.55mm, which is only slightly larger than the original diameter.

[0005] The material being cut is deformed by gravity or the material stress itself, and the saw seams far away from the sawing point will be deformed. Some saw seams will become larger, while others will close up and have no gap at all. If the wire is broken and needs to be re-cut, when the saw seams far away from the cutting point are closed (usually when the cutting depth exceeds 20cm), it will be impossible to cut along the original position. This will cause the half-cut rough material to be unable to continue cutting, resulting in a significant loss of the entire rough material being scrapped. Only when the saw seam close to the deepest cutting will it not close up because it is still in contact with the stone on one side, so if you want to re-cut, you can only thread the wire from the position close to the broken wire. However, when cutting large materials, such as cutting stone, the span of the stone may exceed 3 meters, and it is impossible to pass a 0.5mm diameter diamond wire through a gap of 3 meters and no more than 0.55mm. Therefore, some special methods are needed for threading.

[0006] Among them, the diameter of the diamond wire currently used is 0.036-0.7mm, and there is a trend of becoming thinner and thinner. Since the diameter of the diamond wire is very small, the saw seam formed after cutting is also very small. When the wire is broken, it is necessary to connect the wires, and at the same time, the connected diamond wire is required to pass through the original cutting seam. Therefore, the requirements are: 1. The bonding strength is high and can withstand the tension during the running of the diamond wire. Generally speaking, the strength after bonding needs to reach more than 30% of the original breaking tension of the diamond wire. 2. The connected diamond wire has good toughness and bending resistance, and needs to be able to bypass the radius of the guide wheel. 3. The outer diameter of the diamond wire after rewiring cannot exceed the size of the saw seam. 4. The wiring also needs to be convenient and quick.

[0007] Diamond wire is composed of mother wire (high carbon steel wire), diamond, and coating. Taking 0.4mm diameter diamond wire as an example, the mother wire diameter is 0.3mm, the outer diameter of the mother wire plus diamond plus coating is 0.4mm, and the sawing seam is 0.42-0.45mm. That is to say, after rewiring, the outer diameter of the diamond wire cannot exceed 0.42mm.

[0008] If the welding connection process is used for the butt welding of diamond wires, first, the diameter of the diamond wire is too small to achieve a very accurate butt joint. Second, the weld scar at the welding point is too small, making it difficult to achieve a firm connection. Third, the diamond wire material is too hard and brittle after welding, and the diamond wire is easily broken at the welding point, and the toughness is insufficient. If the joint crimping process is used, the joint is too thin and has low strength, and the crimped joint will deform, causing the diameter to exceed the size of the saw seam and cannot pass through the saw seam. Therefore, the crimping process cannot meet the requirements of the wiring of the diamond wire. Summary of the invention

[0009] The purpose of the present invention is to provide a threading method and a wire breakage processing method, wherein the threading method is convenient and quick and can meet the needs of threading in slender gaps; the wire breakage processing method can be applicable to wire breakage processing of diamond wires.

[0010] The present invention is implemented by the following technical solution: a threading method, characterized in that the following steps are adopted:

[0011] Insert the diamond wire into the groove at one end of the guide;

[0012] Weld the diamond wire to the guide with two or more welding points;

[0013] Annealing the solder joints;

[0014] After cooling, grind the weld so that the thickness of the weld end is less than the thickness of the guide;

[0015] The guide is passed through the saw seam of the stone, and the diamond wire is passed through the saw seam of the stone.

[0016] The purpose of opening grooves on the guiding member is to increase the contact surface between the diamond wire and the guiding member, and the grooves can reduce the wall thickness of the guiding member. The purpose of annealing is to eliminate residual stress and prevent the solder joints from falling off. Spot welding is used for welding. When the guiding member passes through the saw kerf, the diamond wire will be repeatedly folded at the connection. After welding and annealing, the strength and toughness of the connection between the diamond wire and the guiding member can be ensured, and the diamond wire can be prevented from detaching during wire threading. The greatest advantage of this wire threading method is its convenience and speed. The entire welding and annealing process usually only takes 5-6 minutes. The thickness of the guiding member is greater than the diameter of the bus bar. The purpose of this is to avoid grinding the bus bar as much as possible when grinding the solder joints, because grinding the bus bar will affect the strength and cause the diamond wire to break.

[0017] As a preferred method, it also includes the manufacturing process of the guiding member, specifically:

[0018] Select a guiding member, and the thickness d1 of the guiding member is: d < d1 < D, where D is the outer diameter of the diamond wire and d is the diameter of the bus bar of the diamond wire;

[0019] Open grooves on the guiding member. The grooves are V-shaped grooves or U-shaped grooves.

[0020] As a preferred method, the guiding member is a stainless steel strip, and its length is greater than the length of the stone, and its width is 10 cm - 30 cm. In this way, the guiding member has a certain hardness to carry the diamond wire through the saw kerf of the stone, and it also has a certain elasticity, so that the guiding member can be bent and wound in a narrow space when it surrounds the four main guide wheels.

[0021] As a preferred method, annealing is carried out in the following steps:

[0022] Use the outer flame of a lighter to burn the solder joint for 3 - 6 seconds;

[0023] Stop when the solder joint turns red-hot;

[0024] Cool naturally for 5 - 10 seconds.

[0025] Then pull the diamond wire by hand to judge whether it will be easily broken. The lighter is preferably a windproof lighter. The annealing operation is simple and can be learned by ordinary people with a little practice. It should be noted that for small objects, the operation must be carried out on a machine. The equipment should be simple, and the operation process should not be too complicated or too difficult to learn.

[0026] The present invention also provides a wire breakage treatment method, which is characterized by the following steps:

[0027] Adopt the above-mentioned wire threading method to pass the broken wire through each saw kerf from the break to the pay-off end of the pay-off and reeling system;

[0028] Remove the broken wire from the guiding member;

[0029] Connect the wire released from the pay-off end of the pay-off and take-up system with the broken wire that is threaded back;

[0030] Start the multi-wire cutting machine, and collect the wired connection points through the saw seam of the stone by the wire-collecting end of the wire-collecting and paying-off system;

[0031] Complete disconnection processing.

[0032] As a preferred method, the wiring adopts the following steps:

[0033] A capillary tube with two openings at both ends and a hollow interior is selected, wherein the inner diameter of the capillary tube is 1-1.1 times the diameter of the diamond wire mother wire, and the outer diameter of the capillary tube is smaller than the width of the sawing seam and greater than or equal to the diameter of the diamond wire;

[0034] Inject glue into the gap in the middle of the capillary;

[0035] Grind off the outer layers of the two diamond wires to be connected to expose the mother wire;

[0036] Insert the mother wires of the two diamond wires to be connected into the capillary from both ends of the capillary respectively;

[0037] Wait for the glue to cure and complete the wiring.

[0038] As a preferred embodiment, the glue is anaerobic glue.

[0039] The use of capillaries can form an annular wrapping space, so that the contact area is large, the busbar of the diamond wire and the capillary can be better bonded, and a relatively closed space can be formed after the two ends of the capillary are inserted into the busbar, providing a natural environment for bonding with anaerobic adhesive.

[0040] As a preferred embodiment, the capillary is made of stainless steel, the length of the capillary is 2-10 cm, and the wall thickness of the capillary is greater than or equal to 0.03 mm and less than 0.08 mm. If the length of the capillary is too short, the strength after gluing cannot be guaranteed, and if it is too long, gluing is inconvenient. If the wall thickness of the capillary is too thick, the capillary cannot be elastically bent when passing through the main guide wheel and cannot be used. The above-mentioned capillary can withstand a tension of more than 30N, meeting the use requirements of multi-wire cutting, and the capillary has a certain elasticity and can turn when passing through the main guide wheel.

[0041] Compared with the previous technology, the beneficial effects of the present invention are:

[0042] 1. It solves the problem that the diamond wire can continue to return to the broken point and continue cutting after it breaks when cutting large-size materials.

[0043] 2. The problem of the diamond wire being firmly, reliably and quickly connected, and being able to pass through the original saw seam smoothly, is solved.

[0044] By solving the above two problems, new wire can be added for cutting when the diamond wire breaks or when the cutting is halfway through, so that the stone that has been cut halfway can be scrapped without being able to continue cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural schematic diagram of a multi-wire cutting machine;

[0046] Figure 2 It is a schematic diagram of the connection between the guide and the diamond wire in a specific embodiment of the present invention;

[0047] Figure 3 It is a right side view of the guide member and the diamond wire in a specific embodiment of the present invention;

[0048] Figure 4 It is a schematic diagram of a guide member passing through a sawing slot in a specific embodiment of the present invention;

[0049] Figure 5 This is a schematic diagram of the winding of the diamond wire in a specific embodiment of the present invention;

[0050] Figure 6 This is the structural intention when the capillary and the diamond wire are connected in the specific implementation mode of the present invention;

[0051] Figure 7 This is the structural intention after the capillary and the diamond wire are connected in the specific implementation mode of the present invention.

[0052] Explanation of the reference numbers: 1. Lead wheel; 2. Pay-off end; 3. Take-up end; 4. Diamond wire; 41. Busbar; 5. Guide; 51. Groove; 6. Capillary; 7. Glue; 8. Stone; DETAILED DESCRIPTION

[0053] The present invention is described in detail below in conjunction with the accompanying drawings:

[0054] like Figure 1 As shown, the multi-wire cutting machine mainly includes a frame, four main guide wheels 1 rotatably arranged on the frame, and two sets of wire-reeling and wire-paying systems, one of which is used for wire-reeling and wire-paying systems, called wire-reeling end 2, and the released diamond wire 4 is repeatedly wound on the four main guide wheels 1 to form a wire net, and finally connected with another set of wire-reeling and wire-paying systems, which is used for continuous wire-reeling and wire-paying, called wire-reeling end 3, wherein the bottom surface of the wire net is a cutting mesh surface, which is used to participate in the cutting of stone 8.

[0055] When cutting the stone 8, the break position on the wire mesh usually tends to be close to the pay-off end 2 or the take-up end 3 of the pay-off and take-up system. If the break position is close to the take-up end 3 of the pay-off and take-up system, it is necessary to pass the broken wire through each saw cut from the break point and finally thread it back into the take-up end 3 and fix it to the pay-off and take-up wheel of the corresponding pay-off and take-up system. For example, when cutting the stone 8, there are 1 to 100 saw cuts, the pay-off end 2 is near the first saw cut, the take-up end 3 is near the 100th saw cut. If the break occurs at the 70th saw cut, then it can be passed from the 70th saw cut to the 100th saw cut and connected to the pay-off and take-up wheel of the take-up end 3.

[0056] However, when the break position is close to the pay-off end 2 of the pay-off and take-up system, it is necessary to pass the broken wire through each saw cut from the break point and finally thread it back into the pay-off end 2. This is the most efficient way, and it is also necessary to butt-joint the broken wire with the diamond wire 4 at the pay-off end 2 because there is usually new wire available at the pay-off end 2. For example, when cutting the stone 8, there are 1 to 100 saw cuts, the pay-off end 2 is near the first saw cut, the take-up end 3 is near the 100th saw cut. If the break occurs at the 20th saw cut, then it can be passed from the 20th saw cut to the first saw cut and butt-joint with the diamond wire 4 at the pay-off end 2.

[0057] This embodiment provides a method for dealing with broken wires, which is applicable to the situation where the broken wire is close to the pay-off end 2, such as Figure 2-7 shown, and the following steps are adopted:

[0058] Select a guiding member 5, the thickness d1 of the guiding member 5 is: d < d1 < D, where D is the outer diameter of the diamond wire 4, and d is the diameter of the generatrix 41 of the diamond wire 4; the guiding member 5 is a stainless steel bar, and its length is greater than the length of the stone, usually greater than 3.5 m, and the width is 10 cm - 30 cm. In this way, the guiding member 5 has a certain hardness to carry the diamond wire 4 through the saw cuts of the stone 8, and it also has a certain elasticity, so that the guiding member 5 can be bent and wound in a narrow space when winding around the four main guide wheels 1.

[0059] Open a groove 51 on the guiding member 5. The groove 51 is a V-shaped groove or a U-shaped groove.

[0060] Clip the diamond wire 4 into the groove 51 at one end of the guiding member 5;

[0061] Weld the diamond wire 4 and the guiding member 5, and there are more than two welding points;

[0062] Use the outer flame of a lighter to burn the welding points for 3 - 6 seconds;

[0063] Stop when the welding points turn red;

[0064] Let it cool naturally for 5 - 10 seconds to complete annealing.

[0065] After cooling, polish the welding points so that the thickness of the welding end is less than the thickness of the guiding member 5;

[0066] Pass the guide 5 through the sawing seam of the stone 8, and carry the diamond wire 4 through the sawing seam of the stone 8;

[0067] Among them, Figure 4 As shown, threading is done from the saw seam close to the bottom, so that the stones near the bottom will not be closed and can be threaded through;

[0068] Pass the broken wire from the broken part through each saw seam to the wire pay-off end 2 of the wire pay-off system;

[0069] like Figure 5 As shown, after the diamond wire passes through the first sawing seam, it needs to go around the four main wheels once and then pass through the next sawing seam, and repeat this cycle until it reaches the wire-releasing end 2 of the wire-retracting and wire-releasing system.

[0070] Remove the broken wire from the guide 5;

[0071] Connect the wire released from the wire-retracting and -releasing system's wire-retracting and -releasing end 2 with the broken wire that is threaded back;

[0072] A capillary 6 with two openings at both ends and a hollow interior is selected, wherein the inner diameter of the capillary 6 is 1-1.1 times the diameter of the mother wire 41 of the diamond wire 4, and the outer diameter of the capillary 6 is smaller than the width of the sawing seam and greater than or equal to the diameter of the diamond wire 4; the capillary 6 is made of stainless steel, the length of the capillary 6 is 2-10 cm, and the wall thickness of the capillary 6 is greater than or equal to 0.03 mm and less than 0.08 mm;

[0073] Inject glue 7 into the capillary 6; the glue 7 is anaerobic glue;

[0074] Grind away the outer layers of the two diamond wires 4 to be butted together to expose the busbar 41;

[0075] Insert the busbars 41 of the two diamond wires 4 to be connected into the capillary 6 from both ends of the capillary 6 respectively;

[0076] Wait for the glue 7 to solidify and complete the wiring.

[0077] The multi-wire cutting machine is started, and the wired connection points are collected by the wire receiving end 3 of the wire receiving and releasing system through the saw seam of the stone 8; (the purpose of this is to allow the connection points to be collected by the wire receiving end, because the connection points cannot participate in cutting.)

[0078] Complete disconnection processing.

[0079] The purpose of opening the groove 51 on the guide 5 is to increase the contact surface between the diamond wire 4 and the guide 5, and the groove 51 can reduce the wall thickness of the guide 5. The purpose of annealing is to eliminate residual stress and prevent the welding spot from falling off. The welding is performed by a spot welder. When the guide 5 is threading the saw seam, the diamond wire 4 will be carried at the connection and folded repeatedly. After welding and annealing, the strength of the connection between the diamond wire 4 and the guide 5 can be guaranteed, and the diamond wire 4 can be prevented from falling off during threading. The biggest advantage of this threading method is that it is convenient and fast. The entire welding and annealing process usually takes only 5-6 minutes.

[0080] The capillary 6 can form an annular wrapping space, so that the contact area is large, the busbar 41 of the diamond wire 4 and the capillary 6 can be better glued, and a relatively closed space can be formed after the two ends of the capillary 6 are inserted into the busbar 41, providing a natural environment for gluing with anaerobic adhesive.

[0081] If the length of the capillary 6 is too short, the strength after gluing cannot be guaranteed, and if it is too long, gluing is inconvenient. If the wall thickness of the capillary 6 is too thick, the capillary 6 cannot be elastically bent when passing through the guide wheel 1 and cannot be used. The capillary 6 can withstand a tension of more than 30N, meeting the use requirements of multi-wire cutting, and the capillary 6 has a certain elasticity and can turn when passing through the guide wheel 1.

[0082] Although the present invention is illustrated and described by specific embodiments and their alternatives, it should be understood that various changes and modifications within the spirit and scope of the present invention can be implemented. Therefore, it should be understood that the present invention is not limited in any sense except by the limitations of the attached claims and their equivalents.

Claims

1. A threading method, characterized in that: Adopt the following steps: Clip the diamond wire (4) into the groove (51) at one end of the guiding member (5); Weld the diamond wire (4) and the guiding member (5); Anneal the welding point; After cooling, polish the welding point so that the thickness of the welded end is less than the thickness of the guiding member (5); Pass the guiding member (5) through the saw cut of the stone (8), and lead the diamond wire (4) through the saw cut of the stone (8).

2. A threading method according to claim 1, characterized in that: It also includes the manufacturing process of the guiding member (5), specifically: Select the guiding member (5), the thickness d1 of the guiding member (5) is: d < d1 < D, where D is the outer diameter of the diamond wire (4), and d is the diameter of the generatrix (41) of the diamond wire; Open a groove (51) on the guiding member (5).

3. A threading method according to claim 2, characterized in that: The guiding member (5) is a stainless steel strip, and its length is greater than the length of the stone, and the width is 10 mm - 30 mm.

4. A threading method according to claim 1, characterized in that: The annealing adopts the following steps: Use the outer flame of a lighter to burn the welding point for 3 - 6 seconds; Stop when the welding point turns red; Cool naturally for 5 - 10 seconds.

5. A disconnection processing method, characterized in that: Adopt the following steps: Adopt the wire threading method described in any one of the above claims 1 - 4, and pass the broken wire through each saw cut from the break to the wire feeding end (2) of the wire pay-off and take-up system; Remove the broken wire from the guiding member (5); Connect the wire released from the wire feeding end (2) of the wire pay-off and take-up system with the broken wire passed back; Start the multi-wire cutting machine, and the joint after connection is taken in by the wire take-up end (3) of the wire pay-off and take-up system through the saw cut of the stone (8); Complete the treatment of the broken wire.

6. A disconnection processing method according to claim 5, characterized in that: The connection adopts the following steps: Select a capillary (6) with openings at both ends and hollow inside. The inner diameter of the capillary (6) is 1 - 1.1 times the diameter of the generatrix (41) of the diamond wire (4). The outer diameter of the capillary (6) is less than the width of the saw cut and greater than or equal to the diameter of the diamond wire (4); Inject glue (7) into the middle gap of the capillary (6); Grind off the outer layers of the two diamond wires (4) to be butt-jointed to expose the generatrix (41); Insert the generatrices (41) of the two diamond wires (4) to be butt-jointed into the capillary (6) from both ends of the capillary (6) respectively; Wait for the glue (7) to cure to complete the connection.

7. A disconnection processing method according to claim 5, characterized in that: The glue (7) is anaerobic glue.

8. A disconnection processing method according to claim 5, characterized in that: The capillary (6) is made of stainless steel material. The length of the capillary (6) is 2 - 10 cm, and the wall thickness of the capillary (6) is greater than or equal to 0.03 mm and less than 0.08 mm.

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