Granite sawing method and special saw blade, and stone reciprocating swing type gang sawing machine

Abstract

The application provides a granite sawing method, a special saw blade and a stone reciprocating swing type gang sawing machine, and belongs to the technical field of stone cutting equipment. The application comprises a material placing device and a saw frame. The material placing device can swing along a horizontal direction parallel to the length direction of the diamond saw blade and move along a vertical direction. The diamond saw blade is arranged in parallel in the saw frame. The saw frame and the diamond saw blade can swing at high speed. The swing track of the saw frame is an adjustable combination of a straight line and a circular arc. The swing frequency of the material placing device is less than the swing frequency of the saw frame. During the swinging process of the material placing device in one direction, the saw frame can swing reciprocally at least twice. The application has the beneficial effects that it can solve the problem of cutting high-hardness granite stone, and can discharge the normal falling diamond particles in the sawing channel at the same time of cutting the stone, thereby prolonging the service life of the whole saw blade, reducing the production cost of the whole gang sawing machine and the processing cost of the granite.

Description

Technical Field

[0001] This invention relates to the field of stone cutting equipment technology, specifically to a granite sawing method and a specially made saw blade, and a reciprocating oscillating gang saw for stone. Background Technology

[0002] A stone slab gang saw is a specialized piece of equipment used to cut large blocks of stone into thin slabs. When cutting large blocks of stone, the existing gang saw uses a feed drive to move the stone blocks vertically, perpendicular to the trajectory of the diamond saw blades. Multiple sets of parallel saw blades are mounted inside the saw frame and move rapidly in a direction parallel to the blades. As the large blocks of stone are continuously fed, the saw blades in the saw frame cut them into slabs of a specified thickness. After processing such as grinding and cutting, the slabs are finished with high-quality decorative stone slabs for construction.

[0003] However, because the saw blade in the above-mentioned cutting method continuously presses and cuts along the entire length of the stone block in a horizontal plane, it is prone to warping and deformation under stress. Therefore, this cutting method is not suitable for cutting stones with high hardness and strength, such as granite, quartz, and jade. For this reason, various gang saws attempting to be specifically designed for granite cutting have begun to appear on the market. For example, Chinese patent CN103273572A provides a frame saw for cutting granite using diamond-toothed saw blades. This frame saw changes the horizontal or translational movement of the saw blade to a left-right oscillation, changing the contact between the saw blade and the stone cutting surface from planar contact to curved contact. This ensures that the saw teeth can apply sufficient cutting pressure to the stone and achieve the cutting of granite.

[0004] However, in actual operation, the above-mentioned cutting method still has defects: 1. Because the stone only moves vertically up and down when the frame saw cuts the stone, the bottom surface of the cut is prone to forming an arc-shaped saw path that is concave in the middle and convex on both sides, which is not conducive to the cooling of the cutting teeth and the removal of slag; in addition, although there are technical inspirations on the market for ensuring that the cutting outline is approximately straight by moving the stone left and right, different gang saws have different characteristics, and simply putting two types of equipment together cannot achieve the cutting function; 2. Due to the high strength of granite, unlike the waste produced when sawing marble, there are more diamond particles that fall off when cutting granite, which are heavier and cannot be removed by water washing alone. At the same time, the cutting waste left in the cut will seriously affect the life of the cutting tools. 3. To ensure that the cutting teeth can cut high-hardness stone, the current industry trend is to research and match cutting tools based on the cutting principles of existing marble gang saws and granite sand saws. While ensuring the quality of the cut plate, the cutting tools in the existing technology cannot meet the most basic service life requirements. The fundamental reason is that the cutting trajectory length of the cutting teeth in the existing technology is at least the welding spacing of the cutting teeth, which is greater than 110mm. In fact, when cutting medium-hardness granite, once the contact trajectory length of the cutting teeth exceeds 40mm, heat dissipation becomes difficult and wear becomes rapid. As a result, almost no cutting tool can cut a plate to a depth of more than 8 meters, and the entire cutting process requires extremely frequent tool replacements, resulting in extremely high operating costs. Therefore, it cannot be used in industrial production. Summary of the Invention

[0005] The technical problem solved by this invention is to provide a granite sawing method and a specially designed saw blade and a reciprocating oscillating gang saw for cutting high-hardness granite, which can not only achieve the cutting of high-hardness granite, but also remove diamond particles that normally fall out of the saw path while cutting the stone. This method can extend the service life of the entire saw blade and reduce the production cost of the entire gang saw and the processing cost of granite.

[0006] To solve the above-mentioned technical problems, firstly, the present invention provides a granite sawing method, which includes a material placement device and a saw frame. The material placement device can swing horizontally parallel to the length direction of the diamond saw blade and move vertically. Diamond saw blades are arranged in parallel inside the saw frame. The saw frame and the diamond saw blades can swing back and forth at high speed. The swing trajectory of the saw frame is an adjustable combination of straight line and arc. The swing frequency of the material placement device is less than the swing frequency of the saw frame. During the swing of the material placement device in one direction, the saw frame can swing back and forth at least twice. When cutting granite using the above sawing method, as the feeding device swings to the left, initially the saw frame also swings to the left. The linear velocity of the diamond saw blade carrying away the waste is less than the cutting linear velocity of the diamond saw blade, i.e., less than the swing linear velocity of the diamond saw blade. Then, as the feeding device continues to swing to the left, the saw frame swings to the right, and the linear velocity of the diamond saw blade carrying away the waste is greater than the cutting linear velocity of the diamond saw blade. At this time, each left and right swing of the saw frame can drive the waste to move in the opposite direction of the feeding device. Depending on the length and density characteristics of different stones, it generally takes 3-6 swings to remove most of the waste in the saw path.

[0007] Furthermore, within one swing stroke of the saw frame, the teeth of each diamond saw blade cut the stone placed on the material feeding device one tooth at a time, ensuring that each saw blade cuts the stone with a minimum number of teeth, thus avoiding the saw blade from curling and deforming under stress when cutting the whole at the same time.

[0008] Furthermore, the oscillation frequency of the material feeding device is 0.2-0.4 times that of the oscillation frequency of the saw frame; the oscillation stroke of the material feeding device is 80-250mm, and the oscillation stroke of the saw frame is 180-250mm. At this time, the oscillation strokes of the saw frame and the oscillation strokes of the material feeding device can better achieve the cutting effect and the slag removal effect. That is, when processing a 3400mm long stone, it is not easy for slag to accumulate in the middle of the saw track within a length of about 500mm, and the waste slag can be discharged after traveling a maximum of 1500mm in one direction within the saw track. In other words, five unidirectional chip removals can remove all the waste slag inside the saw track. In addition, it can maximize the cutting efficiency.

[0009] Furthermore, the maximum linear velocity of the material feeding device is 0.08-0.17 m / s, the maximum linear velocity of the saw frame is 2-2.7 m / s, and the oscillation frequency of the saw frame is 100-150 rpm. At this time, the oscillation speed of the material feeding device and the oscillation speed of the saw frame can perfectly achieve the slag removal effect. Moreover, the oscillation frequency of the saw frame used is 100-150 rpm, which is much greater than the parameter of no more than 91 rpm for conventional gang saws. This enables high-frequency, low-feed cutting, which helps to alleviate the stress and deformation of the saw blade.

[0010] Secondly, this invention also provides a specially designed saw blade for implementing the above-mentioned granite sawing method. The blade includes a substrate with teeth connected to it. Each tooth comprises a specially designed body containing the following components and their weight percentages: 20-25% copper powder, 35-45% iron powder, 10-12% cobalt powder, 3-5% nickel powder, 3-6% tungsten carbide powder, 2% tin powder, 8-10% zinc powder, 1-2% iron phosphide, and 3-7% diamond particles. Based on these materials, and in conjunction with the above-mentioned sawing method, the specially designed saw blade provided by this invention can effectively sharpen and maintain lasting strength. Compared with existing technologies, the tooth life can be increased by more than 150%.

[0011] Furthermore, the hot-pressing sintering temperature of the carcass is 780-900 degrees Celsius, and the hot-pressing sintering pressure is 20-65 MPa. At this temperature, the hardness of the sintered cutting teeth is HRB55-110, and the density is 6.6-7.5 g / cm³. 3 Flexural strength 750-975MPa.

[0012] In addition, this invention also provides a stone reciprocating oscillating gang saw, which includes a material feeding device and a saw frame located above the material feeding device. The material feeding device is equipped with a lifting drive mechanism and a horizontal reciprocating drive mechanism. Diamond saw blades are horizontally arranged inside the saw frame. An oscillating drive mechanism is driven to the end of the saw frame. A set of swing arms is hinged to each end of the saw frame. The upper ends of the two sets of swing arms are hinged to a swing arm support device through a hinge shaft. The distance between the upper ends of the two sets of swing arms is less than or greater than the distance between the lower ends. In this case, since the two sets of swing arms on the saw frame are never parallel, when the saw frame oscillates back and forth, the swing arms at both ends of the saw frame will not reach the lowest point at the same time. Therefore, the diamond saw blades inside the saw frame gradually reach the lowest point along the entire length, thereby realizing that the saw blade teeth cut the stone tooth by tooth at the lowest point in sequence, and at any given moment, only the minimum number of teeth participate in the cutting, greatly reducing the stress deformation of the entire diamond saw blade. Meanwhile, since the material feeding device in this invention can also drive the stone to swing back and forth in a direction parallel to the direction of saw blade movement, this invention can ensure that the protruding point on the bottom surface of the saw path is preferentially cut by the cutting teeth on the diamond saw blade, preventing the diamond saw blade from forming a large arc-shaped saw path on the bottom surface of the stone saw kerf, thus greatly reducing the contact length and time between the diamond cutting teeth and the stone, improving the heat dissipation of the diamond cutting teeth, and increasing the tool life.

[0013] Furthermore, this invention also provides a second type of reciprocating oscillating gang saw for stone, which includes a saw frame. One end of the saw frame is connected to an oscillating drive mechanism, and each end of the saw frame is hinged with a set of floating swing arms. The upper end of each set of floating swing arms is hinged to a set of main swing arms, and the upper end of the main swing arms is hinged to a swing arm support device via a hinge shaft. In this case, compared to the saw frame in a conventional gang saw, the sawing trajectory of the saw frame in this invention can obtain an adjustable combination of straight lines and arcs depending on the sharpness of the blade. That is, when the diamond saw blade has good sharpness, due to the low cutting resistance, the pressure of the diamond saw blade on the stone is low, and the saw frame can maintain the state where the diamond saw blade cuts the stone at the lowest point. At this time, the oscillating trajectory of the diamond saw blade teeth inside the saw frame is approximately an arc, and the teeth are in near-point contact with the stone, making the teeth extremely difficult to wear and maintaining a long tool life.

[0014] When the diamond particles on the surface of a diamond saw blade are ground to rounded corners, reducing its sharpness, the increased cutting resistance causes the saw blade to experience a significant upward lifting force. This cutting force exceeds the weight of the saw frame, causing the saw frame to rotate along the intermediate floating hinge between the floating arm and the main arm, lifting it to a certain height. This creates a straight, dragging trajectory on the stone's saw path, significantly increasing the contact time between the cutting teeth and the stone. This leads to rapid wear of the cutting teeth, exposing new diamond particles and restoring higher sharpness. In short, by adjusting the length of the straight segment of the sawing trajectory, the straightness accuracy of the cut material and the optimal lifespan of the cutting teeth can be achieved.

[0015] Furthermore, forced trajectory changing devices are installed at the bottom of both ends of the saw frame. This way, regardless of whether the teeth of the diamond saw blade installed on the saw frame become dull, when the saw frame swings to a position close to the lowest point, it will be forcibly blocked from continuing to move downward under the action of the forced trajectory changing devices. At this time, it will inevitably form a straight line trajectory through the swing of the floating arm, and finally form a cutting trajectory with arcs on both sides and a straight line at the bottom. This ensures that there is a 0-40mm straight line contact trajectory between the teeth and the stone. Based on this contact length, the present invention can make the blade have a better edge sharpening state and enable the use of teeth with higher body strength, thereby obtaining a more reasonable tool life.

[0016] Furthermore, the swing drive mechanism is a crank-connecting rod mechanism, and the specific parameters can be designed according to actual production needs.

[0017] From the above technical solutions, it can be seen that the present invention has the following advantages: 1. When using the granite sawing method provided by the present invention to cut granite, the present invention can not only achieve granite cutting through the swing of the saw frame and the material feeding device, but also discharge diamond particles that normally fall out of the saw path through the swing of the saw frame and the material feeding device, preventing the diamond saw blade from being damaged by diamond particles falling into the saw path; 2. When using the first type of stone reciprocating swing gang saw provided by the present invention to cut granite, since the two sets of swing arms on the saw frame are always not parallel, when the saw frame swings back and forth, the swing arms at both ends of the saw frame will not reach the lowest point at the same time. Therefore, the diamond saw blade in the saw frame reaches the lowest point sequentially along the entire length, thereby realizing the principle of sequential tooth-by-tooth contact cutting of the stone by the saw blade teeth at the lowest point, and at any instant... The minimum number of cutting teeth involved in the cutting significantly reduces the stress and deformation of the saw blade. Simultaneously, because the material feeding device in this invention can also drive the stone to oscillate back and forth in a direction parallel to the saw blade's movement direction, this invention ensures that the protruding points on the bottom surface of the saw path are preferentially cut by the saw blade teeth, preventing the diamond saw blade from forming a large arc-shaped saw path on the bottom surface of the stone kerf. This significantly reduces the contact length and time between the diamond cutting teeth and the stone, improves heat dissipation of the diamond cutting teeth, and increases tool life. 3. When using the second type of reciprocating oscillating gang saw provided by this invention to cut granite, compared to the saw frame in a conventional gang saw, the sawing trajectory of the saw frame in this invention can be dynamically adjusted according to the change in the sharpness of the cutting tool, alleviating saw blade deformation and thus improving the adaptability of the same cutting tool to different types of stone, making it more suitable for sawing various high-hardness stones. 4. The present invention can also add a forced track changing device to the lower end of the saw frame of the second type of stone reciprocating swing gang saw. The forced track changing device ensures that the saw blade has the most basic straight-line guide trajectory, so that the blade teeth have the most basic sharpness, thereby obtaining better guiding accuracy and higher cutting accuracy. Attached Figure Description

[0018] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of Embodiment 3 of the present invention; Figure 3 This is a schematic diagram of the operation of Embodiment 3 of the present invention; Figure 4 This is a schematic diagram of the structure of Embodiment 4 of the present invention; Figure 5 This is a schematic diagram of the structure of Embodiment 5 of the present invention.

[0020] In the diagram: 1. Swing drive mechanism; 2. Stone; 3. Diamond saw blade; 4. Swing arm support device; 5. Material placement device; 6. Horizontal reciprocating drive mechanism; 7. Swing arm; 8. Saw frame; 10. Saw track; 11. Top hinge device; 12. Middle floating hinge device; 13. Saw frame hinge device; 14. Main swing arm; 15. Floating swing arm; 16. Forced track changing device; V1, Right cycloidal speed of material placement device; -V1, Left cycloidal speed of material placement device; V2, Left cycloidal speed of saw frame; -V2, Right cycloidal speed of saw frame; V2+V1, Waste discharge speed; V2-V1, Waste return speed; P1, Swing frequency of material placement device; P2, Swing frequency of saw frame. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1 like Figure 1 As shown in the figure, this embodiment provides a granite sawing method, which includes a material placement device 5 and a saw frame 8. The material placement device 5 can swing horizontally parallel to the length direction of the diamond saw blade and feed vertically. Diamond saw blades 3 are arranged in parallel inside the saw frame 8, and the saw frame 8 and the diamond saw blades 3 can swing back and forth at high speed. The swing trajectory of the saw frame 8 is an adjustable combination of straight lines and arcs. In this way, in one swing stroke of the saw frame 8, the cutting teeth of each diamond saw blade 3 contact the stone material 2 placed on the material placement device 5 one tooth at a time, thereby ensuring that a single saw blade cuts the stone material 2 with a minimum number of cutting teeth, avoiding the saw blade from curling and deforming under force when cutting the entire saw blade at the same time.

[0023] Furthermore, in this embodiment, the oscillation frequency of the material placement device 5 is less than that of the saw frame 8, and the saw frame 8 can oscillate back and forth 3-6 times during the oscillation of the material placement device 5 in one direction. Thus, when the granite is cut using the above-mentioned granite sawing method, during the leftward oscillation of the material placement device 5, initially, when the material placement device 5 oscillates to the left, the saw frame 8 also oscillates to the left, and the linear velocity of the diamond saw blade 3 carrying away the waste residue inside the saw frame 8 is less than the cutting linear velocity of the diamond saw blade 3, that is, less than the oscillation linear velocity of the diamond saw blade 3. Then, when the material placement device 5 continues to oscillate to the left, the saw frame 8 oscillates to the right, and the linear velocity of the diamond saw blade 3 carrying away the waste residue inside the saw frame 8 is greater than the cutting linear velocity of the diamond saw blade 3. At this time, each left-right oscillation of the saw frame 8 can drive the waste residue to move in the opposite direction to the material placement device 5, and depending on the length and density characteristics of different stone materials 2, generally 3-6 oscillations are enough to carry out most of the waste residue in the saw path.

[0024] Specifically, preferably, the oscillation frequency of the material feeding device 5 is 0.2-0.4 times the oscillation frequency of the saw frame 8, and the maximum oscillation linear velocity of the material feeding device 5 is preferably 0.08-0.17 m / s, the maximum oscillation linear velocity of the saw frame 8 is preferably 2-2.7 m / s, the oscillation stroke of the material feeding device 5 is 80-250 mm, the oscillation stroke of the saw frame 8 is 180-250 mm, and the slag discharge speed is twice the oscillation linear velocity of the material feeding device 5. The swing stroke and the swing stroke of the feeding device 5 can better achieve the cutting effect and slag removal effect. That is, when processing a 3400mm long stone 2, it is not easy for slag to accumulate in the middle of the saw path within a length of about 500mm. Moreover, the waste slag can be discharged after traveling a maximum of 1500mm in one direction in the saw path. In other words, five unidirectional chip removals can remove all the waste slag inside the saw path. In addition, it can maximize the cutting efficiency, realize high-frequency low-feed cutting, and help alleviate the stress deformation of the saw blade.

[0025] Example 2 This second embodiment provides a special saw blade for implementing the granite sawing method provided in the first embodiment above. It includes a base, on which cutting teeth are connected. The cutting teeth include a special matrix, and the components and their weight percentages contained in the special matrix are as follows: copper powder 20-25%, iron powder 35-45%, tungsten carbide powder 3-6%, cobalt powder 10-12%, nickel powder 3-5%, tin powder 2%, zinc powder 8-10%, iron phosphide 1-2%, and diamond particles 3-7%.

[0026] With the above-described sawing method, the specially designed saw blade provided in this embodiment 2 can effectively sharpen and cut granite.

[0027] Furthermore, as a preferred option, the specially designed matrix is ​​hot-pressed at a temperature of 780-900 degrees Celsius and a hot-pressing pressure of 20-65 MPa. Under these conditions, the hardness of the sintered cutting teeth is HRB55-110, and the density is 6.6-7.5 g / cm³. 3 Flexural strength 750-975MPa.

[0028] Example 3 like Figure 2 , Figure 3 As shown, this embodiment three provides a first type of stone reciprocating swing gang saw, which includes a material feeding device 5 and a saw frame 8 located above the material feeding device 5.

[0029] The material placement device 5 is equipped with a lifting drive mechanism for driving the stone 2 placed inside the material placement device 5 to rise and fall vertically, and a horizontal reciprocating drive mechanism 6 for driving the stone 2 placed inside the material placement device 5 to swing back and forth in the horizontal direction. The horizontal reciprocating drive mechanism 6 can be any one of the following mechanisms that can achieve linear drive: crank connecting rod mechanism, gear and rack transmission mechanism, screw and nut mechanism, chain transmission mechanism, belt transmission mechanism, etc.

[0030] Diamond saw blades 3 are horizontally arranged inside the saw frame 8, and the diamond saw blades 3 are preferably the special saw blades provided in Embodiment 2. A swing drive mechanism 1 is connected to the end of the saw frame 8, and the swing drive mechanism 1 is preferably a crank-connecting rod mechanism. A set of swing arms 7 is hinged to each end of the saw frame 8. The upper ends of the two sets of swing arms 7 are hinged to the swing arm support device 4 via hinge pins, and the upper ends of the two sets of swing arms 7 are at the same height. The distance between the upper ends of the two sets of swing arms 7 is less than or greater than the distance between their lower ends.

[0031] At this time, since the two sets of swing arms 7 on the saw frame 8 are never parallel, when the saw frame 8 swings back and forth, the swing arms 7 at both ends of the saw frame 8 will not reach the lowest point at the same time. Therefore, the diamond saw blade 3 in the saw frame 8 reaches the lowest point in sequence along the entire length, thereby realizing the principle of sequential tooth-to-tooth contact cutting of the stone 2 by the saw blade teeth at the lowest point. Moreover, at any given moment, the minimum number of teeth participate in the cutting, which greatly reduces the stress deformation of the entire diamond saw blade 3.

[0032] Meanwhile, since the material feeding device 5 in this embodiment 3 can also drive the stone 2 to swing back and forth in a direction parallel to the movement direction of the diamond saw blade, this embodiment 3 can ensure that the protruding point on the bottom surface of the saw path is preferentially cut by the cutting teeth on the diamond saw blade 3, preventing the diamond saw blade 3 from forming a large arc-shaped saw path on the bottom surface of the saw kerf of the stone 2, thus greatly reducing the contact length and time between the cutting teeth and the stone 2, improving the heat dissipation of the cutting teeth, and increasing the tool life.

[0033] Example 4 like Figure 4As shown, Embodiment 4 provides a second type of reciprocating swing gang saw for stone. Compared with Embodiment 3, Embodiment 4 mainly modifies the upper connecting structure of the saw frame 8, while the material feeding device remains the same as in Embodiment 3. Specifically, it includes a saw frame 8, one end of which is connected to a swing drive mechanism 1 for driving the saw frame 8 to swing. The swing drive mechanism 1 can be a crank-connecting rod mechanism. Both ends of the saw frame 8 are hinged to a set of floating swing arms 15 via saw frame hinge devices 13, and the upper end of each set of floating swing arms 15 is hinged to a set of main swing arms 14 via an intermediate floating hinge device 12. The upper end of the main swing arms 14 is hinged to the swing arm support device 4 via a top hinge device 11, and the upper ends of the two sets of main swing arms 14 are at the same height. The length of the main swing arms 14 is 700mm-1500mm, and the length of the floating swing arms 15 is 30mm-250mm.

[0034] At this time, compared with the saw frame 8 set in the conventional gang saw, the sawing trajectory of the saw frame 8 in this embodiment 4 can be adjusted according to the change of the sharpness of the blade, so as to alleviate the deformation of the saw blade and thus improve the flatness accuracy of the cut plate.

[0035] Specifically, when the saw frame 8 equipped with the diamond saw blade 3 reciprocates at high speed under the action of the swing drive mechanism 1, the diamond saw blade 3 can perform milling and cutting on the continuously fed stone. Moreover, when the sharpness of the diamond saw blade 3 is good, due to the small cutting resistance, the pressure of the diamond saw blade 3 on the stone 2 is small, and the saw frame 8 can keep the diamond saw blade 3 cutting the stone 2 at the lowest point. At this time, the swing trajectory of the diamond saw blade 3 inside the saw frame 8 is approximately an arc, and the contact between the blade and the stone 2 is approximately point contact. The blade is not easily worn and can maintain a long tool life.

[0036] When the diamond particles on the surface of the diamond saw blade 3 are ground into rounded corners, and the sharpness deteriorates, the diamond saw blade 3 will be subjected to a large upward lifting force due to the high cutting resistance. The cutting force exceeds the weight of the saw frame 8, and the saw frame 8 will rotate along the intermediate floating hinge device 12 between the floating swing arm 15 and the main swing arm 14 and be raised to a certain height. This causes the saw frame 8 to form a straight trajectory of dragging motion on the surface of the stone 2 saw path, thus greatly increasing the contact cutting time between the blade teeth and the stone 2. This causes the blade teeth to wear out quickly, revealing new diamond particles and regaining a higher sharpness. In other words, by adjusting the length of the straight section of the sawing trajectory, the straightness accuracy of the cut plate and the optimal life of the blade teeth can be achieved.

[0037] Based on this, since the saw frame 8 in this embodiment adopts a floating hinge structure, the cutting trajectory of the diamond saw blade 3 inside the saw frame 8 can automatically adjust the lifting height of the saw frame 8 according to the sharpness of the blade teeth to obtain a more ideal contact length between the blade teeth and the stone 2, always maintaining good sharpness of the blade teeth. This improves the cutting quality, expands the application range of the same blade teeth cutting different stones 2, and improves the adaptability of blade teeth with different hardness to cutting the same stone 2. At the same time, since the saw frame 8 can automatically rise and lift as the cutting resistance increases, it avoids the major problem of the saw blade having to bend and deform due to the blade not being sharp.

[0038] Example 5 like Figure 5 As shown, this embodiment five provides a third type of stone reciprocating swing gang saw. Compared with the stone reciprocating swing gang saw provided in embodiment four, the difference of this embodiment five is that: this embodiment five also provides a forced track changing device 16 at both ends of the saw frame 8. The forced track changing device 16 can be a damping roller, a slide rail, or other special device that can maintain the minimum lifting height of the floating swing arm 15.

[0039] Compared to the structure in Embodiment 4, which requires a large number of saw blades to become dull before the saw frame 8 is raised to form a straight bottom trajectory, Embodiment 5 directly installs forced track-changing devices at both ends of the bottom of the saw frame 8 to limit the minimum lifting height of the floating swing arm 15. Thus, regardless of whether the teeth of the diamond saw blade 3 installed on the saw frame 8 become dull, when the saw frame 8 swings to a position close to the lowest point, it will be forcibly blocked from continuing to move downward. At this time, it will inevitably form a straight segment trajectory through the swing of the floating swing arm 15, and finally form a swing trajectory with arcs on both sides and a straight bottom. This ensures that there is a 0-40mm straight segment contact trajectory between the teeth and the stone. Based on this contact length, Embodiment 5 can make the blade have a better sharpening state and enable the use of teeth with higher body strength, thus obtaining a more reasonable tool life.

[0040] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A reciprocating oscillating gang saw for stone, comprising a material feeding device and a saw frame located above the material feeding device, characterized in that, The material feeding device is equipped with a lifting drive mechanism and a horizontal reciprocating drive mechanism. Diamond saw blades are arranged in parallel inside the saw frame. One end of the saw frame is connected to a swing drive mechanism. Each end of the saw frame is hinged with a set of floating swing arms. The upper end of each set of floating swing arms is hinged with a set of main swing arms. The upper end of the main swing arms is hinged to the swing arm support device through a hinge shaft. The upper ends of the two sets of main swing arms are at the same height. The bottom ends of the saw frame are fixedly installed with forced track changing devices that can limit the minimum lifting height of the floating swing arms.

2. The stone reciprocating oscillating gang saw according to claim 1, characterized in that, The saw frame swing drive mechanism is a crank-connecting rod mechanism.

3. The stone reciprocating oscillating gang saw according to claim 1, characterized in that, A diamond saw blade consists of a matrix, on which cutting teeth are attached. The cutting teeth consist of a specially made matrix. The matrix contains the following components and their weight percentages: copper powder 20-25%, iron powder 35-45%, cobalt powder 10-12%, tungsten carbide powder 3-6%, nickel powder 3-5%, tin powder 2%, zinc powder 8-10%, iron phosphide 1-2%, and diamond particles 3-7%.

4. The stone reciprocating oscillating gang saw according to claim 3, characterized in that, The hot pressing sintering temperature of the carcass is 780-900 degrees Celsius, and the hot pressing sintering pressure is 20-65 MPa.

5. A method for sawing granite using a reciprocating oscillating gang saw as described in any one of claims 1-4, characterized in that, The material feeding device can swing horizontally parallel to the length of the diamond saw blade and move vertically. Diamond saw blades are arranged in parallel inside the saw frame. The saw frame and diamond saw blades can swing back and forth at high speed. The swing trajectory of the saw frame is an adjustable combination of straight line and arc. The swing speed of the material feeding device is less than the swing speed of the saw frame, and the swing frequency of the material feeding device is less than the swing frequency of the saw frame. During the swing of the material feeding device in one direction, the saw frame can swing back and forth at least twice.

6. The granite sawing method according to claim 5, characterized in that, During one swing stroke of the saw frame, the teeth of each diamond saw blade cut the stone placed on the feeding device one tooth at a time.

7. The granite sawing method according to claim 5, characterized in that, The oscillation frequency of the feeding device is 0.2-0.4 times that of the oscillation frequency of the saw frame; the oscillation stroke of the feeding device is 80-250mm, and the oscillation stroke of the saw frame is 180-250mm.

8. The granite sawing method according to claim 5, characterized in that, The maximum linear velocity of the material feeding device is 0.08-0.17 m / s, the maximum linear velocity of the saw frame is 2-2.7 m / s, and the oscillation frequency of the saw frame is 100-150 rpm.

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