Grinding block positioning device for grinding disc welding machine

Abstract

The present invention provides a grinding block positioning device for a grinding disc welding machine, and belongs to the technical field of welding devices. It solves the problem that the existing grinding disc welding machine is not suitable for welding flaky grinding blocks. The grinding block positioning device of the grinding disc welding machine is arranged above the positioning seat of the disc body, and the grinding block positioning device includes a first mounting seat and multiple groups of positioning rod assemblies. The tops of the positioning rod assemblies are fixedly connected to the first mounting seat, and the first mounting seat is connected to the frame through a lifting structure; the number of groups of the positioning rod assemblies is the same as the number of grinding blocks in the grinding disc, and the positioning rod assemblies are arranged one-to-one with the grinding blocks in the grinding disc, and the positioning rod assemblies are provided for the sides of the grinding blocks to abut against. The grinding block positioning device can position the flaky grinding blocks on the disc body and can also reduce the distance between two adjacent grinding blocks by adjusting the movement direction of the positioning rod assembly and the setting mode of the positioning rod assembly. The positioning rod assembly improves the quality of the grinding disc by improving the arrangement accuracy of the grinding blocks and maintaining the welding accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of welding devices, and relates to a grinding disc welding machine, in particular to a grinding block positioning device of the grinding disc welding machine. Background Art

[0002] A grinding disc refers to a disc-type abrasive tool used in a grinding machine, which is usually composed of a disc body and a diamond grinding block. The diamond grinding block is brazed on the disc body, and the working surface is smoothed and ground through the high-speed rotation of the grinder.

[0003] The grinding disc welding machine is a device specially used for the brazing of grinding discs. The use of the grinding disc welding machine to process grinding discs can not only improve the welding efficiency, but also improve the welding quality. For grinding discs of different structures, the inventor has proposed a variety of grinding disc welding machines, such as an automatic grinding disc welding machine (application number 201210104951.4), a diamond grinding disc welding device (application number 201510059792.4), and a grinding disc welding machine (application number 201810178307.9).

[0004] like Figure 1 and Figure 2 As shown, the grinding blocks of the grinding disc are in the form of sheets, the grinding blocks are tilted relative to the radial line, and the distance between two adjacent grinding blocks is small. The grinding block positioning device in the existing grinding disc welding machine is not suitable for positioning the grinding blocks of the above grinding disc. Summary of the invention

[0005] The present invention proposes a grinding block positioning device for a grinding disc welding machine. The technical problem to be solved by the present invention is how to propose another grinding block positioning device for a grinding disc welding machine, preferably capable of positioning sheet-shaped grinding blocks with small spacing.

[0006] The technical problem to be solved by the present invention can be achieved through the following technical solutions: a grinding disc welding machine includes a frame and a disc body positioning seat, the grinding block positioning device of the grinding disc welding machine is arranged above the disc body positioning seat, the grinding block positioning device includes a first mounting seat and multiple groups of positioning rod assemblies, the tops of the positioning rod assemblies are fixedly connected to the first mounting seat, and the first mounting seat and the frame are connected by a lifting structure; the number of groups of positioning rod assemblies is the same as the number of grinding blocks in the grinding disc and the positioning rod assemblies are arranged one by one with the grinding blocks in the grinding disc, and the positioning rod assemblies are provided for the sides of the grinding blocks to abut against.

[0007] During the welding process of the grinding disc, the grinding disc is first positioned on the disc body positioning seat, and then the lifting structure is manipulated to lower the first mounting seat until the outer side of the grinding block can abut against the positioning rod assembly; then the grinding blocks are installed on the disc body one by one. Specifically, the grinding block is arranged to intersect with the radial line of the disc body positioning seat and the grinding block is inserted from the outside to the inside until the inner end of the outer side surface and the outer end of the outer side surface of the grinding block both abut against the positioning rod assembly. The outer periphery of the disc body has a concave shoulder, and the side of the concave shoulder is for the end of the grinding block to abut; during the process of inserting the grinding block from the outside to the inside, after the end of the grinding block abuts against the side of the concave shoulder, the grinding block slides along the side of the concave shoulder, so that the inner end of the outer side surface of the grinding block automatically abuts against the positioning rod assembly, thereby improving the convenience of the grinding block installation and improving the accuracy of the grinding block installation.

[0008] During the brazing heating process, the grinding disc can still use the grinding block positioning device to position the grinding block, reduce the possibility of the grinding block offset during the brazing high-frequency heating process, and improve the verticality of the grinding block relative to the disc body, the angle consistency of the angle α between the grinding block and the radial line, and the consistency of the spacing between adjacent grinding blocks. After the grinding disc is welded, the first mounting seat is raised by manipulating the lifting structure, so that the positioning rod assembly can be separated from the grinding block.

[0009] Compared with the prior art, the present invention can position the sheet-shaped grinding block on the disc body and reduce the distance between two adjacent grinding blocks by adjusting the movement direction of the positioning rod assembly and the arrangement mode of the positioning rod assembly. The positioning rod assembly can not only position the grinding block during the installation process, but also can position the grinding block during the brazing and heating process, thereby improving the quality of the grinding disc.

[0010] Preferably, the plurality of groups of positioning rod assemblies are evenly arranged circumferentially around the axis of the first mounting seat.

[0011] The positioning rod assembly and the positioning method can adopt any of the following technical solutions: First, the positioning rod assembly includes two positioning rods, one positioning rod is for the inner side surface of the inner end of the grinding block to abut against, and the other positioning rod is for the outer side surface of the outer end of the grinding block to abut against. Second, the positioning rod assembly includes two positioning rods, one positioning rod is for the inner side surface of the grinding block to abut against, and the other positioning rod is for the outer side surface of the outer end of the grinding block to abut against. Third, the positioning rod assembly includes three positioning rods, two positioning rods are for the outer side surface of the grinding block to abut against, and one positioning rod is for the inner side surface of the grinding block to abut against.

[0012] Preferably, the lower end of the positioning rod has an avoidance groove, and the lower end of the positioning rod forms a sheet-like positioning portion.

[0013] Preferably, a rotating frame is rotatably connected to the frame, and the first mounting seat and the rotating frame are connected by a lifting structure, so that the grinding block positioning device can rotate with the grinding disc, that is, the grinding block positioning device can still be used to position the grinding block during the brazing and heating process of the grinding disc, thereby improving the consistency of the grinding block installation position and improving the verticality of the grinding block installation.

[0014] Preferably, the frame is connected to a lifting frame via a first guide rod assembly, and a first cylinder connected to the lifting frame is installed on the frame; the rotating frame and the lifting frame are connected via a bearing; a plurality of disk pressure rods are fixedly connected to the rotating frame; when a disk is provided on the disk positioning seat and the piston rod of the first cylinder is in an extended state, the disk pressure rods press the disk onto the disk positioning seat.

[0015] Preferably, the lifting structure includes a second cylinder, and the first mounting seat and the rotating frame are connected via a second guide rod assembly and the second cylinder.

[0016] Preferably, the lifting structure also includes a third cylinder installed on the lifting frame. The third cylinder adjusts the overlapping height between the positioning rod assembly and the grinding block by limiting the upward movement stroke of the positioning rod assembly. Even if the positioning rod assembly has multiple movement strokes, the positioning rod assembly can be pre-pulled out.

[0017] Preferably, the lifting structure includes a second motor, and the first mounting seat and the rotating frame are connected via a second guide rod assembly; the second motor is installed on the rotating frame, and the rotating shaft of the second motor is connected to the first mounting seat via a screw and nut assembly.

[0018] Preferably, the rotating frame is also connected to the second mounting seat through the second guide rod assembly, and the second mounting seat and the rotating frame are also connected through a fourth cylinder; a grinding block pressure rod is passed through the second mounting seat, the number of the grinding block pressure rods is the same as the number of grinding blocks in the grinding disc, and the grinding block pressure rods are arranged one-to-one with the grinding blocks in the grinding disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the grinding disc.

[0020] Figure 2 It is a schematic diagram of the structure of the grinding disc from a top view.

[0021] Figure 3 It is a three-dimensional structural diagram of the grinding disc welding machine.

[0022] Figure 4 yes Figure 3 A magnified view of the local structure.

[0023] Figure 5 It is a schematic diagram of the main structure in which the positioning portion of the positioning rod and the grinding block are in a partial abutment state.

[0024] Figure 6 It is a three-dimensional structural schematic diagram in which the positioning portion of the positioning rod and the grinding block are in a completely abutting state.

[0025] Figure 7It is a schematic diagram of the front view structure in which the positioning part of the positioning rod and the grinding block are in a completely abutting state.

[0026] Figure 8 It is a three-dimensional structural schematic diagram of a grinding block and a set of positioning rod components in a completely abutting state.

[0027] Fig. 9 yes Figure 7 Schematic diagram of the cross-sectional structure of AA.

[0028] In the figure, 1, frame; 2, disc body positioning seat; 2a, positioning protrusion; 3, disc body clamping device; 3a, lifting frame; 3b, rotating frame; 3c, first guide rod assembly; 3d, first cylinder; 3e, disc body pressure rod; 4, grinding block clamping device; 4a, second mounting seat; 4b, grinding block pressure rod; 4c, fourth cylinder; 4d, spring; 5, grinding block positioning device; 5a, first mounting seat; 5b, positioning rod; 5b1, avoidance groove; 5b2, positioning part; 5c, second cylinder; 5d, second guide rod assembly; 5e, range limit backrest; 6, lifting platform; 7, high-frequency induction heating device; 8, third cylinder; 9, grinding disc; 9a, disc body; 9b, grinding block. DETAILED DESCRIPTION

[0029] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0030] Embodiment 1: Figures 3 to 9 As shown, the grinding disc welding machine includes a frame 1, a disc body positioning seat 2, a disc body pressing device 3, a grinding block pressing device 4 and a grinding block positioning device 5.

[0031] The disc body positioning seat 2 is rotatably connected to the frame 1 , and the disc body positioning seat 2 has a positioning protrusion 2 a that matches the diameter of the center hole of the disc body 9 a of the grinding disc 9 .

[0032] The disc body pressing device 3, the grinding block pressing device 4 and the grinding block positioning device 5 are all arranged above the disc body positioning seat 2. The disc body pressing device 3 is used to press the disc body 9a onto the disc body positioning seat 2, the grinding block positioning device 5 is used for the grinding block 9b to rely on for positioning when the grinding block 9b is installed and arranged, and the grinding block pressing device 4 is used to press the grinding block 9b onto the disc body 9a.

[0033] The disc pressing device 3 includes a lifting frame 3a and a rotating frame 3b. The lifting frame 3a is connected to the frame 1 through a first guide rod assembly 3c and a first cylinder 3d. The rotating frame 3b is located below the lifting frame 3a. The rotating frame 3b is connected to the lifting frame 3a through a bearing. A plurality of disc pressing rods 3e are fixedly connected to the rotating frame 3b. When the piston rod of the first cylinder 3d is in an extended state, the bottom surface of the disc pressing rod 3e is pressed on the disc 9a, and the disc pressing rod 3e applies a downward force to the disc 9a, so that the disc 9a is pressed on the disc positioning seat 2. According to actual conditions, a first motor is installed on the frame 1, which is transmission-connected to the disc positioning seat 2 or the rotating frame 3b, so that the first motor can drive the disc 9a to rotate, thereby improving the uniformity of brazing heating.

[0034] A lifting platform 6 is installed on the frame 1 , and a high-frequency induction heating device 7 is arranged on the lifting platform 6 . The heating coil of the high-frequency induction heating device 7 is annular and is located outside the disk positioning seat 2 .

[0035] The grinding block positioning device 5 includes a first mounting seat 5a and a plurality of positioning rod assemblies. The number of the positioning rod assemblies is the same as the number of the grinding blocks 9b in the grinding disc 9, and the positioning rod assemblies are arranged one by one with the grinding blocks 9b in the grinding disc 9. The positioning rod assemblies are arranged to intersect with the radial lines of the disc body positioning seat 2, and the positioning rod assemblies are provided for the side of the grinding block 9b to abut against. The positioning rod assembly includes two positioning rods 5b, one positioning rod 5b is provided for the inner end side of the grinding block 9b to abut against, and the other positioning rod 5b is provided for the outer end side of the grinding block 9b to abut against; this has the advantages of simple structure, low manufacturing cost, and small thermal expansion and contraction deformation. Therefore, the grinding block positioning device 5 is also suitable for positioning the grinding block 9b in the brazing heating state, reducing the possibility of the grinding block 9b being offset due to rotation and vibration during the induction heating process, and improving the position consistency of the grinding block 9b.

[0036] The lower end of the positioning rod 5b has an avoidance groove 5b1, and the lower end of the positioning rod 5b forms a plate-shaped positioning portion 5b2, which not only ensures the strength of the positioning rod 5b, but also enables the positioning rod 5b to be embedded in a narrower gap, thereby reducing the distance between adjacent grinding blocks 9b in the grinding disc 9.

[0037] The tops of all the positioning rods 5b in all the positioning rod assemblies are fixedly connected with the first mounting seat 5a in a tight fit, that is, the first mounting seat 5a is provided with a mounting hole, and the positioning rods 5b are inserted into the mounting hole. In this way, the positioning rods 5b can be flexibly replaced according to the damage of the positioning rods 5b, which has the advantage of easy disassembly and assembly.

[0038] The first mounting seat 5a is connected to the frame 1 through a lifting structure; the attached figure of the specification shows that the first mounting seat 5a is connected to the frame 1 through a lifting structure, a lifting frame 3a and a rotating frame 3b, the lifting structure includes a second cylinder 5c and a second guide rod assembly 5d, and the first mounting seat 5a is connected to the rotating frame 3b through the second guide rod assembly 5d and the second cylinder 5c; this structure not only improves the compactness of the structure, but also reduces the stroke of the second cylinder 5c, and makes the grinding block positioning device 5 rotate synchronously with the disk body 9a, so that the grinding block positioning device 5 is also suitable for positioning the grinding block 9b in the brazing heating state.

[0039] The grinding block positioning device 5 also includes a range limiter 5e, and the top of the guide rod in the second guide rod assembly 5d is fixedly connected to the range limiter 5e; a third cylinder 8 is installed on the lifting frame 3a, and when the piston rod of the third cylinder 8 is in an extended state and the piston rod of the second cylinder 5c is in a retracted state, the range limiter 5e rests on the piston rod of the third cylinder 8.

[0040] The grinding block pressing device 4 includes a second mounting seat 4a, a grinding block pressing rod 4b and a fourth cylinder 4c. The second mounting seat 4a is also connected to the rotating frame 3b through the second guide rod assembly 5d, and the second mounting seat 4a is also connected to the rotating frame 3b through the fourth cylinder 4c. The number of grinding block pressing rods 4b is the same as the number of grinding blocks 9b in the grinding disc 9, and the grinding block pressing rods 4b are arranged one by one with the grinding blocks 9b in the grinding disc 9. The grinding block pressing rod 4b is penetrated on the second mounting seat 4a, and a spring 4d is sleeved on the grinding block pressing rod 4b, one end of the spring 4d abuts against the grinding block pressing rod 4b, and the other end abuts against the second mounting seat 4a.

[0041] The functions and advantages of each component are further explained by describing the process of brazing the grinding disc 9. The outer periphery of the disc body 9a has a concave shoulder, and the side of the concave shoulder is for the end of the grinding block 9b to abut against; and flux is arranged on the concave shoulder.

[0042] In the first step, the disc body 9a is placed on the disc body positioning seat 2, and the positioning protrusion 2a is embedded in the center hole of the disc body 9a.

[0043] The second step is to operate the piston rod of the first cylinder 3d to be in the extended state, the piston rod of the second cylinder 5c to be in the extended state, and the piston rod of the fourth cylinder 4c to be in the retracted state. In this state, the bottom surface of the plate body pressing rod 3e is pressed on the plate body 9a, so that the plate body 9a is pressed on the plate body positioning seat 2; and the distance between the top surface of the avoidance groove 5b1 in the positioning rod 5b and the top surface of the plate body 9a is greater than the height of the grinding block 9b, and the distance between the bottom surface of the positioning part 5b2 in the positioning rod 5b and the top surface of the plate body 9a is less than the height of the grinding block 9b, so that the grinding block 9b can be embedded in the avoidance groove 5b1 and the side surface of the grinding block 9b can be against the side surface.

[0044] The third step is to insert the grinding blocks 9b into the avoidance grooves 5b1 of the positioning rod assembly one by one, and the grinding blocks 9b are arranged one by one with the positioning rod assembly. When the grinding blocks 9b are inserted from the outside to the inside, after the end of the grinding blocks 9b abuts against the side of the concave shoulder, the grinding blocks 9b slide along the side of the concave shoulder, so that the inner end of the outer side surface of the grinding blocks 9b automatically abuts against the positioning portion 5b2 in one positioning rod 5b, and the grinding blocks 9b are manually moved so that the outer end of the outer side surface of the grinding blocks 9b automatically abuts against the positioning portion 5b2 in another positioning rod 5b.

[0045] In the fourth step, after the grinding blocks 9b are arranged, the piston rod of the fourth cylinder 4c is controlled to be in an extended state, the grinding block pressure rod 4b is pressed on the top surface of the grinding block 9b, and the spring 4d is further compressed.

[0046] The fifth step is to operate the first motor to drive the disc 9a and the grinding block 9b to rotate synchronously, and to operate the high-frequency induction heating device 7 to heat the disc 9a and the grinding block 9b. During the brazing heating process, when the flux reaches a partial melting temperature (such as 650°C-800°C), the piston rod of the second cylinder 5c is operated to be in a retracted state and the piston rod of the third cylinder 8 is operated to be in an extended state. At this time, the overlapping height between the positioning part 5b2 in the positioning rod 5b and the grinding block 9b is 0.5mm-1mm, so as to realize the pre-pulling of the positioning rod 5b and prevent the adjacent grinding block 9b from clamping the positioning part 5b2 of the positioning rod 5b; the positioning rod 5b in this state still positions the grinding block 9b. A rolling element is installed on the piston rod of the third cylinder 8, which can reduce the friction between the piston rod of the third cylinder 8 and the limit backing 5e, and ensure the rotation flexibility. When the flux is completely melted, the piston rod of the third cylinder 8 is controlled to be in a retracted state. At this time, the positioning portion 5b2 in the positioning rod 5b is completely separated from the grinding block 9b, and the positioning rod 5b is completely pulled out.

[0047] Step 6: When the grinding disc 9 is cooled to below 500° C., the piston rod of the first cylinder 3d is controlled to be in a retracted state, and the piston rod of the fourth cylinder 4c is controlled to be in a retracted state.

[0048] Embodiment 2: The structure and principle of this embodiment are basically the same as those of Embodiment 1. The basic similarities are not described in detail, and only the differences are described. The differences are in the third step: when the grinding block 9b is inserted from the outside to the inside, the inner side surface of the inner end of the grinding block 9b abuts against the positioning portion 5b2 in one positioning rod 5b, and the outer side surface of the outer end of the grinding block 9b abuts against the positioning portion 5b2 in another positioning rod 5b.

[0049] Embodiment 3: The structure and principle of this embodiment are basically the same as those of Embodiment 1. The basic similarities are not described in detail, and only the differences are described. The differences are: the positioning rod assembly includes three positioning rods 5b, two positioning rods 5b are for the outer side surfaces of the grinding block 9b to abut, and one positioning rod 5b is for the inner side surface of the grinding block 9b to abut.

[0050] Embodiment 4: The structure and principle of this embodiment are basically the same as those of Embodiment 1. The basic similarities are no longer described in detail, and only the differences are described. The differences are: the lifting structure does not include a second cylinder 5c, but includes a second motor. The second motor is installed on the lifting frame 3a, and the rotating shaft of the second motor is connected to the first mounting seat 5a through a screw rod and nut assembly. The lifting and lowering movement stroke of the first mounting seat 5a is controlled by controlling the second motor, thereby controlling the positioning portion 5b2 of the positioning rod 5b to completely abut or partially abut or completely separate from the grinding block 9b.

Claims

1. A grinding block positioning device for a grinding wheel welding machine, the grinding wheel welding machine comprising a frame (1) and a wheel body positioning seat (2), characterized in that: The grinding block positioning device of the grinding disc welding machine is arranged above the disc body positioning seat (2), and the grinding block positioning device comprises a first mounting seat (5a) and a plurality of positioning rod assemblies, the tops of the positioning rod assemblies are fixedly connected to the first mounting seat (5a), and the first mounting seat (5a) and the frame (1) are connected via a lifting structure; the number of the positioning rod assemblies is the same as the number of the grinding blocks (9b) in the grinding disc (9), and the positioning rod assemblies are arranged in a one-to-one correspondence with the grinding blocks (9b) in the grinding disc (9), and the positioning rod assemblies are provided for the side surfaces of the grinding blocks (9b) to abut against; The positioning rod assembly comprises two positioning rods (5b), one positioning rod (5b) is for the inner side surface of the inner end of the grinding block (9b) to abut against, and the other positioning rod (5b) is for the outer side surface of the outer end of the grinding block (9b) to abut against; or the positioning rod assembly comprises two positioning rods (5b), one positioning rod (5b) is for the inner side surface of the grinding block (9b) to abut against, and the other positioning rod (5b) is for the outer side surface of the outer end of the grinding block (9b) to abut against; or the positioning rod assembly comprises three positioning rods (5b), two positioning rods (5b) are for the outer side surface of the grinding block (9b) to abut against, and one positioning rod (5b) is for the inner side surface of the grinding block (9b) to abut against; The frame (1) is rotatably connected to a rotating frame (3b), and the first mounting seat (5a) and the rotating frame (3b) are connected via a lifting structure; The frame (1) is connected to a lifting frame (3a) via a first guide rod assembly (3c); a first cylinder (3d) connected to the lifting frame (3a) is mounted on the frame (1); the rotating frame (3b) is connected to the lifting frame (3a) via a bearing; a plurality of disc pressing rods (3e) are fixedly connected to the rotating frame (3b); when a disc (9a) is provided on the disc positioning seat (2) and the piston rod of the first cylinder (3d) is in an extended state, the disc pressing rod (3e) presses the disc (9a) onto the disc positioning seat (2); The lifting structure comprises a second cylinder (5c), and the first mounting seat (5a) and the rotating frame (3b) are connected via a second guide rod assembly (5d) and the second cylinder (5c); or the lifting structure comprises a second motor, and the first mounting seat (5a) and the rotating frame (3b) are connected via a second guide rod assembly (5d); the second motor is mounted on the rotating frame (3b), and the rotating shaft of the second motor is connected to the first mounting seat (5a) via a screw rod and nut assembly; The lifting structure further comprises a third cylinder (8) mounted on the lifting frame (3a), the third cylinder (8) being used to adjust the overlapping height between the positioning rod assembly and the grinding block (9b); The grinding block positioning device (5) further comprises a range-limiting backstop (5e), ​​and the top of the guide rod in the second guide rod assembly (5d) is fixedly connected to the range-limiting backstop (5e).

2. The grinding block positioning device of the grinding disc welding machine according to claim 1 is characterized in that: The plurality of groups of positioning rod assemblies are evenly arranged in the circumferential direction around the axis of the first mounting seat (5a).

3. The grinding block positioning device of the grinding disc welding machine according to claim 1, characterized in that: The lower end of the positioning rod (5b) is provided with an avoidance groove (5b1), and the lower end of the positioning rod (5b) forms a sheet-shaped positioning portion (5b2).

4. The grinding block positioning device of the grinding disc welding machine according to claim 1, characterized in that: The rotating frame (3b) is also connected to the second mounting seat (4a) via a second guide rod assembly (5d), and the second mounting seat (4a) and the rotating frame (3b) are also connected via a fourth cylinder (4c); a grinding block pressure rod (4b) is provided on the second mounting seat (4a), the number of the grinding block pressure rods (4b) is the same as the number of the grinding blocks (9b) in the grinding disc (9), and the grinding block pressure rods (4b) and the grinding blocks (9b) in the grinding disc (9) are arranged in a one-to-one correspondence.

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