A fixing fixture for saw blade welding

Abstract

The present invention discloses a fixing fixture for saw blade welding, the center of the saw blade has a mounting hole, the fixture comprises a placement block, a clamp block and a clamping block, when the clamp block approaches the center point, the clamp block is retracted to facilitate the placement and replacement of the saw blade; when the clamp block moves away from the center point, the clamp block is dispersed to fix the saw blade by contacting the mounting hole; after the clamp block contacts the mounting hole, the clamping block approaches the placement block to fix the saw blade. The fixing fixture adopts a hydraulic or pneumatic system to drive the movement of the clamp block and the clamping block, so that the fixture can complete the fixing and release of the saw blade in a very short time; the combined use of the clamp block and the clamping block not only enables the fixture to adapt to saw blades of different sizes, only the spacing of the clamp blocks needs to be simply adjusted; it also ensures the stability of the saw blade during the welding process, avoiding welding quality problems caused by poor fixation.

Description

Technical Field

[0001] The invention belongs to the technical field of saw blade production and processing, and particularly relates to a fixing fixture for saw blade welding. Background Art

[0002] Saw blade welding usually refers to welding the carbide tip (also called blade teeth or saw teeth) to the base of the saw blade. This process is crucial to the manufacture of high-quality saw blades because it directly affects the performance and life of the saw blade. In order to ensure that the saw teeth can be accurately positioned and remain stable during the welding process, a special fixing fixture for saw blade welding is usually used to fix them. However, the existing fixing fixture has the following problems in the actual use of saw blade welding:

[0003] The existing fixing clamps, in terms of their structural composition and their application in fixing saw blades, usually require bolt fixing, pin fixing or pin shaft connection to ensure a stable connection between the components. The above connection methods may not only loosen or fall off due to vibration and other reasons during use, which can easily lead to a weakened fixing effect, causing the saw blade to be displaced during the welding process, affecting the welding accuracy and quality; when using these fixing methods, the operator is also required to have certain experience and skills to avoid uneven clamping force applied to different parts of the saw blade after the saw blade is fixed, causing local deformation of the saw blade. Furthermore, the number of saw blades welded is relatively large, and there will be a situation where the saw blade needs to be replaced frequently. Due to the use of bolts, pins and other fixing methods, the existing fixing clamps need to be tightened or inserted one by one, and the assembly process is relatively time-consuming; it increases the workload of the operator and reduces production efficiency.

[0004] In addition to the limitations of the connection method, the biggest challenge facing the existing fixing clamps is to cope with the diversity of saw blades. Since there are saw blades of various sizes and shapes on the market, this requires the clamps to be highly adaptable and flexible. However, the current fixing clamps often cannot meet the installation requirements of saw blades of different specifications at the same time, resulting in users may needing to equip different saw blades with special clamps, which not only increases costs but also reduces production efficiency.

[0005] In summary, the existing saw blade welding fixing fixture has problems such as insufficient connection stability, high operation complexity and poor adaptability during actual use, which easily leads to a decrease in saw blade welding quality and welding efficiency. Summary of the invention

[0006] In view of this, an object of the present invention is to provide a fixing fixture for saw blade welding to solve the problems existing in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the technical solution of the present invention is a fixing fixture for welding a saw blade, wherein the center of the saw blade has a mounting hole, and the fixture comprises a placement block, wherein the placement block is used to support and place the saw blade, and the placement block has a center point; a clamp block, wherein the clamp block passes through the mounting hole and is used to clamp and fix the saw blade, wherein the clamp blocks are distributed on the placement block in a circular array with the center point as the center, and the clamp block can approach or move away from the center point; a clamp block, wherein the clamp block cooperates with the placement block to clamp the saw blade, wherein the clamp block is arranged on the clamp block and is arranged opposite to the placement block, and wherein the clamp block can approach or move away from the placement block; when the clamp block approaches the center point, the clamp block is retracted to facilitate the placement and replacement of the saw blade; when the clamp block moves away from the center point, the clamp block is dispersed and the saw blade is fixed by contacting the mounting hole; after the clamp block contacts the mounting hole, the clamp block approaches the placement block to fix the saw blade.

[0008] Preferably, the placement block has a first oil circuit, and the oil outlets of the first oil circuit are distributed in a circular array with the center point as the center; the clamp block is provided with a piston rod, and the piston rod is arranged at the oil outlet of the first oil circuit; through the oil supply or oil discharge of the first oil circuit, the movement of the clamp block toward the center point is controlled so that it can approach or move away from the center point.

[0009] Furthermore, the clamp block has a second oil circuit in a U-shape, and the oil outlet side of the second oil circuit has an oil cavity, and the oil cavity is used to install the clamping block; through the oil supply or oil discharge of the second oil circuit, the movement of the clamping block toward the placement block is controlled so that it can approach or move away from the placement block.

[0010] Furthermore, the oil inlet of the second oil circuit is located on the end face of the piston rod, so that the first oil circuit and the second oil circuit are connected, thereby realizing the movement control of the clamp block toward the center point and the movement control of the clamp block toward the placement block through the oil supply or oil discharge of the first oil circuit.

[0011] Furthermore, the bottom end of the clamp block has an installation cavity, which passes through the second oil circuit and has an opening facing a direction away from the center point. A partition is movably arranged in the installation cavity, and the partition has a connecting hole. By controlling the position of the connecting hole, the conduction or closure control of the second oil circuit is achieved. When the clamp block moves away from the center point, the connecting hole and the second oil circuit are connected through the inner wall of the installation hole, and the second oil circuit is switched to a conducting state. When the clamp block approaches the center point, as the mounting hole and the partition separate, the connecting hole and the second oil circuit are no longer connected, and the second oil circuit is switched to a closed state.

[0012] Furthermore, the bottom end of the oil chamber is open, and one side of the opening has a first guide surface; the clamping block can extend from the opening, and a pressure plate is movably provided at the bottom end of the clamping block, and the bottom of the pressure plate has a second guide surface, and a second spring is provided between the pressure plate and the clamping block; when the second oil circuit supplies oil, the clamping block approaches the placement block, and under the action of the second spring, the pressure plate pops up from the bottom end of the clamping block, and the saw blade is fixed by the pressure plate and the placement block; when the second oil circuit drains oil, the clamping block moves away from the placement block, and under the action of the first guide surface and the first guide surface, the pressure plate retreats to the bottom end of the clamping block.

[0013] Preferably, support rods are arranged around the placement block, the support rods and the placement block are in contact with the saw blade and the contact surfaces of the two are on the same plane; the support rods are used for overall support and stability of the saw blade; a slide groove is provided on the placement block, and the slide groove is used for installing the clamp block so that the clamp block can move along the slide groove.

[0014] Furthermore, the oil inlet of the first oil circuit is located at the center point, and a support tube is provided on the back side of the placement block at the center point, and the support tube is connected to the first oil circuit.

[0015] Furthermore, a solenoid valve is provided on the support tube, and a pressure sensor is provided on the placement block; the opening and closing of the solenoid valve is controlled by numerical feedback of the pressure sensor to ensure that the saw blade is placed in place before welding.

[0016] Furthermore, the clamp also includes a machine base, which includes a support frame, on which a mounting rod is rotatably provided, and the mounting rod is connected to the support tube to achieve multi-station welding after the saw blade is fixed.

[0017] The technical effects of the present invention are mainly reflected in the following aspects:

[0018] The fixing fixture uses a hydraulic or pneumatic system to drive the movement of the clamp block and the clamping block, which greatly reduces the need for manual intervention, improves operating efficiency, and enables the fixture to complete the fixing and release of the saw blade in a very short time; the linkage design of the clamp block and the clamping block enables the fixture to adapt to saw blades of different sizes by simply adjusting the spacing of the clamp blocks; the combined use of the clamp block and the clamping block ensures the stability of the saw blade during the welding process and avoids welding quality problems caused by poor fixation.

[0019] The oil inlet of the second oil circuit is set on the end face of the piston rod, so that the first oil circuit and the second oil circuit are connected; this means that when the first oil circuit is supplied with oil, the oil will enter the oil inlet of the second oil circuit through the piston rod while pushing the piston, thereby driving the movement of the clamping block. When supplying oil, the second oil circuit is controlled by the partition to open or close, so that the clamp block automatically opens the second oil circuit after it moves into place; when draining oil, the movement of the clamp block is constrained by the limit protrusion, so that the clamp block can retreat first to prevent the saw blade from being worn. It is only necessary to continuously supply or drain oil to the first oil circuit to control the second oil circuit, and then control the movement of the clamping block, which simplifies the operation steps, improves work efficiency, and can be applied to saw blades of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the present invention;

[0021] Figure 2 It is a rear view of the present invention;

[0022] Figure 3 for Figure 2 Structural diagram of the placement block, clamp block and clamping block;

[0023] Figure 4 for Figure 2 A cross-sectional view of the placement block, the clamp block and the clamping block;

[0024] Figure 5 for Figure 3 A cross-sectional view of the placement block;

[0025] Figure 6 for Figure 3 A cross-sectional view of the middle clamp block and the clamping block;

[0026] Figure 7 for Figure 2 Structural diagram of the middle engine base;

[0027] In the figure: 1. placement block, 11. first oil circuit, 12. support rod, 13. slide groove, 14. support tube; 2. clamp block, 21. piston rod, 22. second oil circuit, 23. oil chamber, 24. mounting chamber, 25. partition, 26. connecting hole, 27. opening, 28. first guide surface; 3. clamping block, 31. pressure plate, 33. second spring; 4. saw blade; 5. machine base, 51. support frame, 52. mounting rod. DETAILED DESCRIPTION

[0028] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0029] In this embodiment, it should be understood that the terms "middle", "upper", "lower", "top", "right", "left end", "above", "back", "middle", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, in this specific embodiment, if the connection or fixing method between components is not specifically described, the connection or fixing method can be through bolt fixing or pin fixing, or pin shaft connection and the like commonly used in the prior art, and therefore, it will not be described in detail in this embodiment.

[0031] Embodiment 1

[0032] See also Figure 1-4A fixing fixture for welding a saw blade 4, wherein the center of the saw blade 4 has a mounting hole (also called a center hole), and the mounting hole is provided for facilitating assembly and use of the existing saw blade 4, and the fixing fixture is designed using this feature. The clamp includes a placement block 1, which is used to support and place the saw blade 4, and the placement block 1 has a center point; support rods 12 are arranged around the placement block 1, and the support rods 12 and the placement block 1 are in contact with the saw blade 4 and the contact surfaces of the two are on the same plane; the support rods 12 are used for the overall support and stability of the saw blade 4; a clamp block 2, which passes through the mounting hole and is used to clamp and fix the saw blade 4, and the clamp blocks 2 are distributed on the placement block 1 in a circular array with the center point as the center of the circle, and the clamp blocks 2 can approach or move away from the center point; a clamp block 3, the clamp block 3 and the placement block 1 cooperate to clamp the saw blade 4, the clamp block 3 is arranged on the clamp block 2 and is arranged opposite to the placement block 1, and the clamp block 3 can approach or move away from the placement block 1; specifically, the shape of the placement block 1 is not limited, and it is used to place the saw blade 4, and its center is the center point; support structures are also arranged around it to ensure the stability of the saw blade 4 when it is placed. The clamp blocks 2 are designed to be several in number, which are distributed in a circular array around the center point. Each clamp block 2 can move closer to or farther from the center point on the placement block 1. The clamp block 2 is connected to the placement block 1 through a specific mechanism, such as a mechanical transmission, a hydraulic system or a pneumatic system, so as to realize the automatic movement of the clamp block 2. The clamp block 3 is installed on each clamp block 2. When the clamp block 2 moves away from the center point of the placement block 1, the clamp block 3 will also move accordingly. It is arranged opposite to the placement block 1 to clamp the saw blade 4. The clamp block 3 can also be controlled by a mechanical transmission, a hydraulic system or a pneumatic system to move closer to or farther from the placement block 1.

[0033] How the Fixture Works

[0034] When the clamp block 2 approaches the center point, the clamp block 2 is retracted to facilitate the placement and replacement of the saw blade 4; when the clamp block 2 moves away from the center point, the clamp block 2 disperses and fixes the saw blade 4 by contacting the mounting hole; after the clamp block 2 contacts the mounting hole, the clamping block 3 approaches the placement block 1 to fix the saw blade 4.

[0035] Saw blade 4 placement: When the jaws 2 are close to the center point, they will close together to form a larger space for placing or replacing the saw blade 4. The saw blade 4 is placed on the placement block 1, and the center hole is aligned with the center point of the placement block 1.

[0036] Saw blade 4 fixation: After the saw blade 4 is placed, the clamp block 2 starts to move away from the center point and fixes the saw blade 4 by contacting the center hole of the saw blade 4. After the clamp block 2 contacts the mounting hole, the clamp block 3 moves closer to the placement block 1 to further strengthen the fixing effect and ensure that the saw blade 4 will not be displaced during the welding process. A hydraulic or pneumatic system is used to drive the movement of the clamp block 2 and the clamp block 3, which greatly reduces the need for manual intervention and improves operating efficiency. In this way, the fixing and release of the saw blade 4 can be completed in a very short time, which is very suitable for large-scale production environments. The linkage design of the clamp block 2 and the clamp block 3 enables the clamp to adapt to saw blades 4 of different sizes, and only the spacing of the clamp block 2 needs to be simply adjusted. The combined use of the clamp block 2 and the clamp block 3 ensures the stability of the saw blade 4 during the welding process and avoids welding quality problems caused by poor fixation.

[0037] Embodiment 2

[0038] This embodiment relates to a fixing fixture for welding a saw blade 4. Compared with the fixing fixture in the first embodiment, this embodiment further defines the transmission mode between the components, specifically the hydraulic system transmission, and the specific situation is as follows:

[0039] See also Figure 1-6The placement block 1 has a first oil circuit 11, and the oil outlets of the first oil circuit 11 are distributed in a circular array with the center point as the center of the circle; the placement block 1 is integrated with the first oil circuit 11, the oil inlet of the oil circuit is located below the center hole, and the oil outlets are arranged around the center hole. The clamp block 2 is provided with a piston rod 21, and the piston rod 21 is arranged at the oil outlet of the first oil circuit 11; the clamp block 2 has a second oil circuit 22 arranged in a U shape, and the oil outlet side of the second oil circuit 22 has an oil cavity 23, and the clamp blocks 2 are distributed in a circular array around the center hole, and each clamp block 2 has a piston rod 21, and the piston rod 21 is located at the oil outlet of the first oil circuit 11. Each clamp block 2 is integrated with a U-shaped second oil circuit 22, and an oil cavity 23 is formed on one side of the oil outlet of the second oil circuit 22, and the oil cavity 23 is used to install the clamp block 3. The oil cavity 23 is used to install the clamp block 3; the clamp block 3 can be extended and retracted along the oil cavity 23. The first oil circuit 11 is used to control the expansion and contraction of the clamp block 2, and the second oil circuit 22 is used to control the extension and contraction of the clamp block 3, so that the saw blade 4 can be quickly positioned and fixed. The purpose of designing the second oil circuit 22 into a U-shape is to allow the first oil circuit 11 and the second oil circuit 22 to supply oil to perform the fixing action of the saw blade 4; so that the first oil circuit 11 and the second oil circuit 22 can share the same hydraulic system, and the oil supply of the first oil circuit 11 can be used to simultaneously control the actions of the clamp block 2 and the clamp block 3, thereby simplifying the hydraulic control system of the entire clamp. Specifically, the fixing clamp in this embodiment completely relies on the hydraulic system to work, and by controlling the oil supply or oil discharge of the oil circuit, the saw blade 4 can be quickly positioned and fixed, reducing the need for manual operation. Since the clamp block 2 can automatically adjust its position as needed, the clamp can adapt to saw blades 4 of different sizes, and there is no need to equip each specification of saw blade 4 with a special clamp. By accurately controlling the hydraulic system, the stability of the saw blade 4 during the welding process is ensured, and welding quality problems caused by poor fixation are avoided. By controlling the movement of the clamping block 3 through the second oil circuit 22 , it can be ensured that the clamping force applied to each part is uniform, thereby preventing the saw blade 4 from being deformed locally.

[0040] Lieutenant General Figure 1 , 2, 5, 7, the placement block 1 is provided with a slide 13, the slide 13 is used to install the clamp block 2, and the clamp block 2 is moved along the slide 13, so as to achieve the operation of approaching or moving away from the center point. Specifically, the design of the slide 13 allows the clamp block 2 to move smoothly along the predetermined trajectory. When the clamp block 2 approaches the center point, they will disperse, which is convenient for placing or replacing the saw blade 4; when the clamp block 2 moves away from the center point, they will gather and fix the saw blade 4. The oil inlet of the first oil circuit 11 is located at the center point, and a support tube 14 is provided on the back of the placement block 1 at the center point, and the support tube 14 is connected to the first oil circuit 11; a support tube 14 is provided at the center point of the back of the placement block 1, and the support tube 14 is connected to the first oil circuit 11. A solenoid valve is provided on the support tube 14, and a pressure sensor is provided on the placement block 1; the opening and closing of the solenoid valve is controlled by the numerical feedback of the pressure sensor to ensure that the saw blade 4 is placed in place before welding. Only when the saw blade 4 is fully placed in place and the pressure sensor detects a preset pressure value, the solenoid valve will open, thereby starting the oil supply of the first oil circuit 11, pushing the clamp block 2 and the clamp block 3 to complete the fixing process. The clamp also includes a machine base 5, which includes a support frame 51, on which a mounting rod 52 is rotatably arranged, and the mounting rod 52 is connected to the support tube 14 to achieve multi-station welding after the saw blade 4 is fixed. Specifically, the support tube 14 is located at the center point of the back of the placement block 1, and it is connected to the first oil circuit 11. The support tube 14 can be connected to an external hydraulic system to provide or recover oil, thereby controlling the pressure change of the first oil circuit 11.

[0041] How the Fixture Works

[0042] The movement control of the clamp block 2 toward the center point is realized by supplying or draining oil in the first oil circuit 11, so that the clamp block 2 can be moved closer to or farther from the center point. The movement control of the clamp block 3 toward the placement block 1 is realized by supplying or draining oil in the second oil circuit 22, so that the clamp block 3 can be moved closer to or farther from the placement block 1.

[0043] Placement of saw blade 4: When the saw blade 4 needs to be placed, the first oil circuit 11 is drained, the clamp block 2 moves toward the center point, the piston rod 21 compresses the oil in the first oil circuit 11, and the clamp block 2 is retracted to form a larger space for placing or replacing the saw blade 4.

[0044] Saw blade 4 fixation: After the saw blade 4 is placed, the first oil circuit 11 supplies oil, the jaw block 2 moves away from the center point, and the piston rod 21 pushes the jaw block 2 to expand and contact the center hole of the saw blade 4. When the jaw block 2 contacts the saw blade 4, the second oil circuit 22 supplies oil, the clamping block 3 moves closer to the placement block 1, and the pressure plate 31 pops out under the action of the second spring 33, thereby fixing the saw blade 4.

[0045] Saw blade 4 is released: After welding is completed, the second oil circuit 22 is drained, the clamping block 3 is moved away from the placement block 1, and the pressure plate 31 is retracted to the bottom end of the clamping block 3 under the action of the first guide surface 28. Then, the first oil circuit 11 is drained, the clamp block 2 moves closer to the center point, the piston rod 21 compresses the oil in the first oil circuit 11, the clamp block 2 is retracted, and the saw blade 4 is released for easy removal.

[0046] See also Figure 4 , 6 The bottom end of the oil chamber 23 is provided with an opening 27, and one side of the opening 27 has a first guide surface 28; the clamping block 3 can extend from the opening 27, and a pressure plate 31 is movably provided at the bottom end of the clamping block 3, and the bottom of the pressure plate 31 has a second guide surface, and a second spring 33 is provided between the pressure plate 31 and the clamping block 3, and the second spring 33 is used for the pop-up and retraction of the pressure plate 31.

[0047] Working principle of pressure plate 31

[0048] Fixing the saw blade 4: When the second oil circuit 22 supplies oil, the pressure of the oil pushes the clamping block 3, so that the clamping block 3 is close to the placement block 1. During the movement of the clamping block 3, the compressed second spring 33 will be slowly released until the pressure plate 31 pops out under the action of the second spring 33; under the action of the second spring 33, the pressure plate 31 pops out from the bottom end of the clamping block 3, and the saw blade 4 is fixed by the pressure plate 31 and the placement block 1; the pressure plate 31 firmly presses the saw blade 4 to fix the saw blade 4.

[0049] Release the saw blade 4: When the second oil circuit 22 drains oil, the oil pressure decreases, causing the clamping block 3 to move away from the placement block 1. Under the action of the first guide surface 28 and the first guide surface 28, the pressure plate 31 retreats to the bottom end of the clamping block 3; in the process of the clamping block 3 moving away from the placement block 1, the second guide surface at the bottom of the pressure plate 31 interacts with the first guide surface 28 of the oil chamber 23, causing the pressure plate 31 to retract into the oil chamber 23 of the clamping block 3. As the clamping block 3 continues to move away from the placement block 1, the second spring 33 eventually retracts the pressure plate 31 completely, and the saw blade 4 is released.

[0050] Embodiment 3

[0051] This embodiment relates to a fixing fixture for welding a saw blade 4. Compared with the fixing fixture in the second embodiment, this embodiment further defines the first oil passage 11 and the second oil passage 22. The specific conditions are as follows:

[0052] See also Figure 4 , 6, the conduction or closing control of the second oil circuit 22: the bottom end of the caliper block 2 has a mounting cavity 24, the mounting cavity 24 passes through the second oil circuit 22, and its opening 27 faces the direction away from the center point, and a partition 25 is movably arranged in the mounting cavity 24, and the partition 25 has a connecting hole 26, and a first spring is arranged between the partition 25 and the caliper block 2; the conduction or closing control of the second oil circuit 22 is realized by controlling the position of the connecting hole 26;

[0053] Working principle of the second oil circuit 22

[0054] When the clamp block 2 moves away from the center point, the connecting hole 26 and the second oil circuit 22 are connected through the inner wall of the mounting hole, so that the second oil circuit 22 is switched to the conducting state; the inner wall of the mounting hole pushes the partition 25, so that the connecting hole 26 and the second oil circuit 22 are connected; at this time, the second oil circuit 22 is opened, and the oil can enter the second oil circuit 22 from the first oil circuit 11 through the piston rod 21, thereby driving the clamp block 3 to approach the placement block 1; while the second oil circuit 22 supplies oil, the clamp block 3 will move toward the placement block 1 and fix the saw blade 4 through the pressure plate 31. When the clamp block 2 approaches the center point, as the mounting hole and the partition 25 separate, the connecting hole 26 and the second oil circuit 22 are not connected, and the second oil circuit 22 is switched to the closed state; the oil cannot flow into the second oil circuit 22, and the clamp block 3 stops moving; at the same time, the first spring can push the partition 25 back to the initial position to prepare for the next cycle.

[0055] See also Figure 4 , 6 , a plurality of elastically arranged limiting protrusions are arranged on the inner wall of the oil outlet end of the first oil circuit 11; the oil inlet of the second oil circuit 22 is located on the end face of the piston rod 21, so that the first oil circuit 11 and the second oil circuit 22 are connected, thereby realizing the control of the movement of the clamp block 2 to the center point and the movement of the clamp block 3 to the placement block 1 through the oil supply or oil discharge of the first oil circuit 11. Control principle: the end face of the piston rod 21 is connected with the oil inlet of the second oil circuit 22, which means that when the first oil circuit 11 supplies oil, the oil will enter the oil inlet of the second oil circuit 22 through the piston rod 21 while pushing the piston, thereby driving the movement of the clamp block 3. Furthermore, a partition 25 is arranged to realize the conduction or closing control of the second oil circuit 22; and the partition 25 will open the second oil circuit 22 under the push of the inner wall of the mounting hole, at which time, the clamp block 2 has moved into place. The limiting protrusion is used to restrict the movement of the clamp block 2 when draining oil, so that the clamp block 3 can retreat first to prevent the saw blade 4 from being worn. The second oil circuit 22 can be controlled by only continuously supplying or draining oil to the first oil circuit 11, thereby controlling the movement of the clamp block 3, which simplifies the operation steps, improves work efficiency, and can be applied to saw blades 4 of different sizes.

[0056] Specific workflow

[0057] Preparation stage: the first oil circuit 11 is drained, the clamp block 2 is moved closer to the center point, the mounting hole is separated from the partition 25, and the connecting hole 26 is not adjacent to the second oil circuit 22. The second oil circuit 22 is closed, and the clamp block 3 does not move. The saw blade 4 can be easily placed or removed.

[0058] Fixing stage: oil is supplied through the first oil circuit 11, the clamp block 2 moves outward, and the inner wall of the mounting hole pushes the partition plate 25, so that the connecting hole 26 borders the second oil circuit 22. The second oil circuit 22 is opened, and oil enters the second oil circuit 22, driving the clamp block 3 to move toward the placement block 1. The pressure plate 31 pops out from the bottom end of the clamp block 3 to fix the saw blade 4.

[0059] Release stage: drain oil through the first oil circuit 11, and let the clamp block 2 approach the center point; at this time, since the limit protrusion constrains the movement of the clamp block 2, let the clamp block 3 retreat first to prevent the saw blade 4 from being worn during the release process. After the clamp block 3 is reset, continue to drain oil and the clamp block 2 will approach the center point; finally, the mounting hole is separated from the partition 25, and the connecting hole 26 is not adjacent to the second oil circuit 22; the second oil circuit 22 is closed, the oil no longer flows into the second oil circuit 22, and the clamp block 3 stops moving. The first spring pushes the partition 25 back to the initial position to prepare for the next cycle.

[0060] The technical effects of the present invention are mainly reflected in the following aspects:

[0061] The fixing clamp adopts a hydraulic or pneumatic system to drive the movement of the clamp block 2 and the clamping block 3, which greatly reduces the need for manual intervention and improves operating efficiency, so that the clamp can complete the fixing and releasing of the saw blade 4 in a very short time; the linkage design of the clamp block 2 and the clamping block 3 enables the clamp to adapt to saw blades 4 of different sizes, and only requires simple adjustment of the spacing of the clamp block 2; the combined use of the clamp block 2 and the clamping block 3 ensures the stability of the saw blade 4 during the welding process and avoids welding quality problems caused by poor fixation.

[0062] The oil inlet of the second oil circuit 22 is set on the end face of the piston rod 21, so that the first oil circuit 11 and the second oil circuit 22 are connected; this means that when the first oil circuit 11 supplies oil, the oil will enter the oil inlet of the second oil circuit 22 through the piston rod 21 while pushing the piston, thereby driving the movement of the clamping block 3. When supplying oil, the second oil circuit 22 is controlled by the partition 25 to open or close, so that the clamp block 2 automatically opens the second oil circuit 22 after moving into position; when draining oil, the movement of the clamp block 2 is constrained by the limiting protrusion, so that the clamping block 3 can retreat first to prevent the saw blade 4 from being worn. It is only necessary to continuously supply or drain oil to the first oil circuit 11 to control the second oil circuit 22, thereby controlling the movement of the clamping block 3, which simplifies the operation steps, improves work efficiency, and can be applied to saw blades 4 of different sizes.

[0063] In addition, as common knowledge in the industry, the solenoid valve, pressure sensor and saw blade 4 mentioned above are common knowledge, so their principles and structures will not be described in detail.

[0064] Of course, the above are only typical examples of the present invention. In addition, the present invention may also have many other specific implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A fixing fixture for welding a saw blade, the center of the saw blade having a mounting hole, characterized in that: The fixture includes: A placement block, the placement block is used to support and place the saw blade, and the placement block has a center point; A clamp block, which passes through the mounting hole and is used to clamp and fix the saw blade. The clamp blocks are distributed on the placement block in a circular array with the center point as the center, and the clamp blocks can approach or move away from the center point; A clamping block, wherein the clamping block cooperates with the placement block to clamp the saw blade, the clamping block is arranged on the clamp block and is arranged opposite to the placement block, and the clamping block can move closer to or farther from the placement block; When the clamp block approaches the center point, the clamp block is retracted to facilitate placement and replacement of the saw blade; When the clamp block moves away from the center point, the clamp block disperses and fixes the saw blade by contacting the mounting hole; when the clamp block contacts the mounting hole, the clamp block moves closer to the placement block to fix the saw blade; The placement block has a first oil circuit in it, and the oil outlets of the first oil circuit are distributed in a circular array with the center point as the center; the caliper block is provided with a piston rod, and the piston rod is arranged at the oil outlet of the first oil circuit; the movement of the caliper block toward the center point is controlled by supplying or discharging oil in the first oil circuit, so that the caliper block can be close to or away from the center point; The clamp block has a second oil circuit in a U-shape, and an oil cavity is provided on the oil outlet side of the second oil circuit, and the oil cavity is used to install the clamp block; the movement of the clamp block toward the placement block is controlled by supplying or discharging oil in the second oil circuit, so that the clamp block can be close to or away from the placement block; The oil inlet of the second oil circuit is located on the end surface of the piston rod, so that the first oil circuit and the second oil circuit are connected, so that the movement control of the clamp block toward the center point and the movement control of the clamp block toward the placement block are realized through the oil supply or oil discharge of the first oil circuit; The bottom end of the clamp block has a mounting cavity, the mounting cavity passes through the second oil circuit, and its opening faces the direction away from the center point. A partition is movably arranged in the mounting cavity, and a connecting hole is provided on the partition. By controlling the position of the connecting hole, the conduction or closing control of the second oil circuit is realized. When the clamp block moves away from the center point, the connecting hole and the second oil circuit are connected through the inner wall of the mounting hole, so that the second oil circuit is switched to a conducting state. When the clamp block approaches the center point, as the mounting hole and the partition separate, the connecting hole and the second oil circuit are not connected, and the second oil circuit is switched to a closed state. The bottom end of the oil chamber is open, and one side of the opening is provided with a first guide surface; the clamping block can extend from the opening, and a pressure plate is movably provided at the bottom end of the clamping block, and the bottom of the pressure plate is provided with a second guide surface, and a second spring is provided between the pressure plate and the clamping block; when the second oil circuit supplies oil, the clamping block approaches the placement block, and under the action of the second spring, the pressure plate pops up from the bottom end of the clamping block, and the saw blade is fixed by the pressure plate and the placement block; when the second oil circuit drains oil, the clamping block moves away from the placement block, and under the action of the first guide surface and the first guide surface, the pressure plate retreats to the bottom end of the clamping block.

2. The saw blade welding fixture according to claim 1, characterized in that: Support rods are arranged around the placement block, and both the support rods and the placement block are in contact with the saw blade, and the contact surfaces of the two are on the same plane; the support rods are used for overall support and stability of the saw blade; The placement block is provided with a slide groove, and the slide groove is used to install the clamp block so that the clamp block can move along the slide groove.

3. The saw blade welding fixture according to claim 1, characterized in that: The oil inlet of the first oil circuit is located at the center point, and a support tube is provided on the back of the placement block at the center point, and the support tube is connected to the first oil circuit.

4. The saw blade welding fixture according to claim 3, characterized in that: The support tube is provided with a solenoid valve, and the placement block is provided with a pressure sensor; The opening and closing of the solenoid valve is controlled by the numerical feedback of the pressure sensor to ensure that the saw blade is placed in place before welding.

5. The saw blade welding fixture according to claim 3, characterized in that: The clamp also includes a machine base, which includes a support frame, on which a mounting rod is rotatably arranged, and the mounting rod is connected to the support pipe to achieve multi-station welding after the saw blade is fixed.

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