Hard alloy milling blade grinding tool

Abstract

The invention relates to the technical field of milling cutter blade machining, in particular to a hard alloy milling cutter blade grinding tool which comprises a grinding machine head, a fixing unit, an adjusting unit and an abutting unit, the grinding machine head is used for grinding teeth of a milling cutter blade, and the adjusting unit is used for driving the milling cutter blade to rotate so that the milling cutter blade can be matched with the grinding machine head to rotate. The abutting unit comprises a first positioning frame and a second positioning frame, the first positioning frame and the second positioning frame are used for abutting against the two side faces of the milling cutter blade respectively, and the fixing unit is in driving connection with the first positioning frame so as to drive the first positioning frame to move in the direction away from or close to the second positioning frame. The part, exceeding the positioning disc, of the milling cutter blade is clamped through the first abutting strip on the first positioning frame and the second abutting strip on the second positioning frame, the situation that the machining precision is reduced due to deformation during grinding machining is prevented, meanwhile, sliding strips arranged on the first abutting strip and the second abutting strip can extend, and the machining precision is improved. Therefore, the milling cutter blades of different specifications can be ground.

Description

Technical Field

[0001] The invention relates to the technical field of milling cutter blade processing, in particular to a hard alloy milling cutter blade grinding tool. Background Art

[0002] Milling inserts are an indispensable and important tool in metal processing. They process metal workpieces by means of rotary cutting, and have the functions of cutting metal, improving efficiency and enhancing precision. Among them, cylindrical milling inserts are used to process planes on horizontal milling machines. The teeth are distributed on the circumference of the milling cutter. There are straight teeth and spiral teeth, as well as coarse teeth and fine teeth.

[0003] During the toothing process of the milling blade or the secondary grinding process of the milling blade, it is necessary to use grinding equipment to grind the teeth of the milling blade to improve its sharpness in order to achieve the function of milling metal. Therefore, when grinding the milling blade, it is very important to fix the milling blade. The traditional milling blade fixing tool uses two clamping blocks to clamp and fix from the center of the milling blade circle, and cooperate to rotate the milling blade during grinding. However, due to the different sizes of the milling blade, if the radius of the milling blade is large, the clamping block cannot clamp to the periphery of the milling blade, resulting in the thinner milling blade being deformed under the grinding force when grinding the teeth of the milling blade. Although the deformation will recover at the end of grinding, the deformation of the milling blade during grinding will reduce the processing accuracy.

[0004] In view of this, the present invention proposes a cemented carbide milling cutter grinding tool to solve the above technical problems. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] The present invention clamps the portion of the milling cutter blade that extends beyond the positioning plate by means of a No. 1 clamping bar on the first positioning frame and a No. 2 clamping bar on the second positioning frame to prevent deformation during grinding, which would result in a decrease in machining accuracy. At the same time, the sliding bars arranged on the No. 1 clamping bar and the No. 2 clamping bar can be extended, thereby realizing the grinding of milling cutters of different specifications and solving the problems raised in the background technology.

[0007] A cemented carbide milling blade grinding tool comprises a grinding head, a fixing unit, an adjustment unit and a clamping unit, wherein the grinding head is used for grinding the teeth of the milling blade, the adjustment unit is used for driving the milling blade to rotate so that the milling blade cooperates with the grinding head to rotate, the clamping unit comprises a first positioning frame and a second positioning frame, the first positioning frame and the second positioning frame are respectively used to abut the two side surfaces of the milling blade, and the fixing unit is drivingly connected to the first positioning frame to drive the first positioning frame to move away from or close to the second positioning frame.

[0008] As a preferred solution of the present invention, a cemented carbide milling cutter grinding tool is provided, a tool base is fixedly connected to one side of the grinding machine head, a fixing unit is fixedly arranged on the tool base, the fixing unit includes a base plate, the base plate is fixedly connected to the upper end surface of the tool base, a sliding groove is opened in the base plate, a sliding base plate is slidably connected in the sliding groove, a screw rod is threadedly connected to the sliding base plate, a No. 1 motor is also fixedly connected to the base plate, and the output shaft of the No. 1 motor is fixedly connected to one end of the screw rod.

[0009] As a preferred solution of the cemented carbide milling cutter grinding tooling provided by the present invention, the adjustment unit is fixedly connected to the sliding base plate, the adjustment unit includes a support, the support is fixedly connected to the sliding base plate, a No. 3 motor is fixedly connected to the support, and the No. 3 motor is fixedly connected to the positioning unit via a connecting disk.

[0010] As a preferred solution of the cemented carbide milling cutter grinding tool provided by the present invention, the positioning unit includes a fixed disk, the fixed disk and the connecting disk are fixedly connected, the fixed disk is fixedly connected to a protective cover at one end close to the connecting disk, a No. 2 motor is fixedly connected inside the protective cover, and the output shaft of the No. 2 motor passes through the fixed disk and is fixedly connected to the positioning disk.

[0011] As a preferred solution of the cemented carbide milling cutter grinding tool provided by the present invention, three guide grooves are provided on the positioning plate, each of which has a positioning rod sliding through it, and one end of the positioning rod close to the fixed plate is fixedly connected to a linkage rod, and the linkage rod is rotatably connected to the fixed plate.

[0012] As a preferred solution of the cemented carbide milling cutter grinding tool provided by the present invention, a center column for loading the milling cutter is fixedly connected to the center of one side of the positioning plate away from the fixed plate, and the positioning rods are all retracted in the notch of the center column.

[0013] As a preferred solution of the present invention, a cemented carbide milling blade grinding tool is provided, wherein the first positioning frame is fixedly connected to a slider at one end away from the fixed plate, and the slider is slidably connected in a slide groove, and the slide groove is opened on the upper end surface of the base plate and is located on both sides of the slide groove, and a guide rod for guiding the sliding of the slider is arranged in the slide groove, and the guide rod and the slider are slidably connected, and a spring is abutted at one end of the slider away from the No. 1 motor, and the spring is nested on the guide rod.

[0014] As a preferred solution of the present invention, a cemented carbide milling cutter grinding tool is provided, wherein one end of the first positioning frame close to the fixed plate is fixedly connected to a No. 1 tightening bar, one end of the No. 1 tightening bar close to the No. 3 motor abuts against a side of the fixed plate away from the No. 3 motor, and the other end of the No. 1 tightening bar is flush with a side of the positioning plate away from the No. 3 motor; one side of the No. 1 tightening bar is provided with a No. 2 tightening bar cooperating with it to clamp the milling cutter; the No. 2 tightening bar is fixedly connected to the upper end of the second positioning frame, one end of the No. 2 tightening bar close to the No. 1 tightening bar is flush with an end of the second positioning frame close to the No. 1 tightening bar; the second positioning frame is fixedly connected to the upper end of the base plate, and the second positioning frame is provided with an opening for the positioning rod to pass through.

[0015] As a preferred solution of the cemented carbide milling cutter grinding tool provided by the present invention, compensation structures are provided on the No. 1 tightening bar and the No. 2 tightening bar, and the compensation structure includes a slide rail, and the slide rail is opened on the No. 1 tightening bar and the No. 2 tightening bar, and a sliding bar is slidably connected in the slide rail, and the sliding bar is fixed to the No. 1 tightening bar and the No. 2 tightening bar by a tightening screw.

[0016] Beneficial effects of the present invention: During grinding, after the positioning rod supports the milling cutter, the milling cutter, the fixed plate and the positioning plate are concentric, which is convenient for the later rotation of the milling cutter to cooperate with the grinding machine head. After the positioning plate and the second positioning frame cooperate to clamp the milling cutter, the milling cutter can be ground. When the radius of the milling cutter is too large, the No. 1 clamping strip on the first positioning frame and the No. 2 clamping strip on the second positioning frame can clamp the part of the milling cutter that exceeds the positioning plate to prevent deformation during grinding, resulting in a decrease in machining accuracy. At the same time, the sliding strips arranged on the No. 1 clamping strip and the No. 2 clamping strip can be extended, thereby realizing the grinding of milling cutters of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0018] in: Figure 1 It is a schematic diagram of the overall structure of a cemented carbide milling insert grinding tool; Figure 2 It is a schematic diagram of the connection structure of the positioning unit and the fixing unit in a cemented carbide milling insert grinding tool; Figure 3 It is a schematic diagram of the connection structure of a positioning unit in a cemented carbide milling insert grinding tool; Figure 4 for Figure 3 A schematic diagram of the structure enlargement in the middle; Figure 5 It is a schematic diagram of the connection structure of a clamping unit and a positioning unit in a cemented carbide milling insert grinding tool; Figure 6 It is a schematic diagram of the connection structure of a fixing unit, an adjustment unit and a positioning unit in a cemented carbide milling insert grinding tool; Figure 7 for Figure 6 A magnified schematic diagram of the structure at B in the middle; Figure 8 A diagram showing the installation state of a milling blade of a cemented carbide milling blade grinding tool; In the figure: 1. Tooling base; 2. Grinding machine head; 3. Fixed unit; 31. Bottom plate; 32. Sliding groove; 33. Sliding base plate; 34. No. 1 motor; 35. Screw rod; 4. Positioning unit; 41. Fixing plate; 42. Protective cover; 43. No. 2 motor; 44. Positioning plate; 45. Center column; 46. Positioning rod; 47. Linkage rod; 48. Guide groove; 5. Adjustment unit; 51. No. 3 motor; 52. Connection plate; 53. Support; 6. Tightening unit; 61. First positioning frame; 62. Sliding block; 63. Spring; 64. Sliding groove; 65. Guide rod; 66. Tightening strip No. 1; 67. Compensation structure; 671. Slide rail; 672. Sliding strip; 673. Tightening screw; 68. Tightening strip No. 2; 69. Second positioning frame; 610. Opening; 99. Milling blade. DETAILED DESCRIPTION

[0019] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example like Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 8 As shown, a cemented carbide milling blade grinding tool comprises a grinding head 2, a fixing unit 3, an adjustment unit 5 and a pressing unit 6, wherein the grinding head 2 is used for grinding the teeth of the milling blade 99, the adjustment unit 5 is used for driving the milling blade 99 to rotate so that the milling blade 99 rotates in coordination with the grinding head 2, the pressing unit 6 comprises a first positioning frame 61 and a second positioning frame 69, the first positioning frame 61 and the second positioning frame 69 are respectively used for abutting against two side surfaces of the milling blade 99, the fixing unit 3 is drivingly connected to the first positioning frame 61 to drive the first positioning frame 61 to move in a direction away from or close to the second positioning frame 69; The end of the first positioning frame 61 away from the fixed plate 41 is fixedly connected with a slider 62, and the slider 62 is slidably connected in a slide groove 64. The slide groove 64 is provided on the upper end surface of the bottom plate 31 and is located on both sides of the slide groove 32. A guide rod 65 for guiding the slider 62 to slide is provided in the slide groove 64. The guide rod 65 and the slider 62 are slidably connected. The end of the slider 62 away from the first motor 34 is abutted against a spring 63, and the spring 63 is nested on the guide rod 65; One end of the first positioning frame 61 close to the fixed disk 41 is fixedly connected to a No. 1 tightening strip 66, one end of the No. 1 tightening strip 66 close to the No. 3 motor 51 is in contact with a side of the fixed disk 41 away from the No. 3 motor 51, and the other end of the No. 1 tightening strip 66 is flush with a side of the positioning disk 44 away from the No. 3 motor 51. One side of the No. 1 tightening strip 66 is provided with a No. 2 tightening strip 68 for clamping the milling cutter 99 in cooperation therewith, and the No. 2 tightening strip 68 is fixedly connected to the upper end of the second positioning frame 69, and one end of the No. 2 tightening strip 68 close to the No. 1 tightening strip 66 is flush with one end of the second positioning frame 69 close to the No. 1 tightening strip 66, and the second positioning frame 69 is fixedly connected to the upper end of the bottom plate 31, and the second positioning frame 69 is provided with an opening 610 for the positioning rod 46 to pass through; A compensation structure 67 is provided on both the No. 1 tightening bar 66 and the No. 2 tightening bar 68. The compensation structure 67 includes a slide rail 671. The slide rail 671 is opened on the No. 1 tightening bar 66 and the No. 2 tightening bar 68. A sliding bar 672 is slidably connected in the slide rail 671. The sliding bar 672 is fixed to the No. 1 tightening bar 66 and the No. 2 tightening bar 68 by a tightening screw 673.

[0021] In the embodiment, when the fixed disk 41 moves toward the direction approaching the second positioning frame 69, it pushes the first positioning frame 61 to move toward the second positioning frame 69, and the sliding block 62 connected to the lower end of the first positioning frame 61 slides along the guide rod 65 in the slide groove 64 and squeezes the spring 63, and then the positioning rod 46 passes through the opening 610, and the milling blade 99 supported by the positioning rod 46 is finally clamped by the positioning disk 44 and the second positioning frame 69. At the same time, the No. 1 clamping bar 66 on the first positioning frame 61 and the No. 2 clamping bar 68 on the second positioning frame 69 clamp the part of the milling blade 99 that exceeds the positioning disk 44, so as to prevent the grinding head 2 from vibrating when grinding the teeth of the milling blade 99 due to the outer part of the milling blade 99 not being clamped, thereby affecting the grinding accuracy.

[0022] It should be noted that the thickness of the milling blade 99 is different, and the radius is also different. If the grinding part of the thin milling blade 99 is not clamped during grinding, the milling blade 99 is prone to slight deformation during grinding. Although the deformation will recover after the grinding is completed, the deformation will affect the accuracy of the grinding process. Therefore, when grinding, after the positioning rod 46 supports the milling blade 99, the milling blade 99 is concentric with the fixed plate 41 and the positioning plate 44. If the radius of the milling blade 99 is slightly larger than the positioning plate 44, the positioning plate 44 and the second positioning frame 69 cooperate to clamp the milling blade 99, and then the milling blade 99 can be ground. If the radius of the milling blade 99 exceeds the radius of the positioning plate 44 too much, at this time, after the positioning plate 44 and the second positioning frame 69 cooperate to clamp the milling blade 99, the part of the milling blade 99 that exceeds the positioning plate 44 is still not clamped, so deformation will occur during grinding, and the No. 1 tightening strip 66 on the first positioning frame 61 and the No. 2 tightening strip 68 on the second positioning frame 69 can clamp the part of the milling blade 99 that exceeds the positioning plate 44 to prevent processing deformation and affect accuracy. At the same time, the position of the sliding bar 672 in the compensation structure 67 in the slide rail 671 can be adjusted, and then fixed with the tightening screw 673 to cope with the milling blade 99 with a larger grinding radius.

[0023] like Figure 1 and Figure 2As shown, one side of the grinding head 2 is fixedly connected to a tooling base 1, and a fixing unit 3 is fixedly arranged on the tooling base 1. The fixing unit 3 includes a bottom plate 31, and the bottom plate 31 is fixedly connected to the upper end surface of the tooling base 1. A sliding groove 32 is opened in the bottom plate 31, and a sliding base plate 33 is slidably connected in the sliding groove 32. A screw rod 35 is threadedly connected to the sliding base plate 33. A No. 1 motor 34 is also fixedly connected to the bottom plate 31, and the output shaft of the No. 1 motor 34 is fixedly connected to one end of the screw rod 35.

[0024] In the embodiment, after the first motor 34 is started, it drives the lead screw 35 to rotate. Since the lead screw 35 is engaged with the sliding base plate 33 , the sliding base plate 33 slides in the sliding groove 32 under the control of the first motor 34 .

[0025] like Figure 1 , Figure 6 and Figure 7 As shown, the adjustment unit 5 is fixedly connected to the sliding base plate 33 , and the adjustment unit 5 includes a support 53 , and the support 53 is fixedly connected to the sliding base plate 33 , and a third motor 51 is fixedly connected to the support 53 , and the third motor 51 is fixedly connected to the positioning unit 4 via a connecting plate 52 .

[0026] In the embodiment, when the third motor 51 rotates, it drives the connecting plate 52 and the protective cover 42 to rotate synchronously, and drives the positioning unit 4 to drive the milling blade 99 to rotate, so as to cooperate with the grinding head 2 to process the milling blade 99.

[0027] The specific steps are as follows: After the fixing unit 3 drives the clamping unit 6 to clamp the milling blade 99, the grinding head 2 starts to process the teeth on the milling blade 99 between the one-to-one clamping strips 66, and then the fixing unit 3 drives the clamping unit 6 to stop clamping the milling blade 99. At the same time, the adjustment unit 5 drives the positioning unit 4 and the milling blade 99 to rotate the preset angle, and transmits the unprocessed teeth of the milling blade 99 to the one-to-one clamping strips 66 in turn. Then, the fixing unit 3 drives the clamping unit 6 again to clamp the milling blade 99, so that the grinding head 2 grinds the teeth on the milling blade 99 between the one-to-one clamping strips 66. After multiple coordinated adjustment of the angle of the milling blade 99 for grinding, all the teeth on the milling blade 99 will be processed.

[0028] like Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 8As shown, the positioning unit 4 includes a fixed disk 41, the fixed disk 41 and the connecting disk 52 are fixedly connected, one end of the fixed disk 41 close to the connecting disk 52 is fixedly connected to a protective cover 42, a second motor 43 is fixedly connected inside the protective cover 42, and the output shaft of the second motor 43 passes through the fixed disk 41 and is fixedly connected to the positioning disk 44; The positioning plate 44 is provided with three guide grooves 48, each of which has a positioning rod 46 slidingly passing therethrough. One end of the positioning rod 46 close to the fixed plate 41 is fixedly connected to a linkage rod 47, and the linkage rod 47 is rotatably connected to the fixed plate 41. A center column 45 for loading the milling cutter blade 99 is fixedly connected to the center of the side of the positioning plate 44 away from the fixed plate 41 , and the positioning rods 46 are all retracted in the notch of the center column 45 .

[0029] In the embodiment, the second motor 43 is started to drive the positioning plate 44 to rotate. When the positioning plate 44 rotates, it will drive the guide groove 48 to rotate. The guide groove 48 drives the positioning rod 46 to move away from the center column 45. At this time, the milling blade 99 installed on the center column 45 is supported by three positioning rods 46. The milling blade 99 is coaxial with the center column 45 at this time, completing the positioning step of the milling blade 99.

[0030] The workflow is as follows: First, the extension distance of the sliding bar 672 in the compensation structure 67 is adjusted according to the radius of the milling blade 99 to be ground, and then the milling blade 99 is put on the center column 45, and then the No. 2 motor 43 is started. The No. 2 motor 43 drives the positioning plate 44 to rotate. When the positioning plate 44 rotates, the positioning rod 46 is driven by the guide groove 48 to move away from the center column 45. At this time, the milling blade 99 is supported by three positioning rods 46, and the milling blade 99 and the center column 45 are coaxial, thereby completing the positioning of the milling blade 99. Then start the No. 1 motor 34, which drives the bottom plate 31 to slide in the sliding groove 32 toward the second positioning frame 69 through the screw rod 35, and then the positioning plate 44 and the second positioning frame 69 clamp the milling blade 99. When the fixed plate 41 moves, it pushes the first positioning frame 61 to move toward the second positioning frame 69. Finally, the No. 1 tightening strip 66 on the first positioning frame 61 and the No. 2 tightening strip 68 on the second positioning frame 69 cooperate to clamp the edge of the milling blade 99. When the first positioning frame 61 moves, the spring 63 is compressed by the slider 62, and then the grinding head 2 is started to grind the teeth on the milling blade 99 (the area processed by the grinding head 2 is two symmetrical No. 1 tightening strips). The area between the tightening strips 66), then the No. 1 motor 34 reverses, driving the positioning plate 44 away from the second positioning frame 69, and at the same time the spring 63 stretches to drive the first positioning frame 61 to slide and reset in the direction close to the No. 1 motor 34. At this time, the No. 3 motor 51 rotates, driving the positioning unit 4 and the milling blade 99 to rotate at a preset angle, so that the teeth on the unground milling blade 99 rotate to the processing area of ​​the grinding head 2, and then the No. 1 motor 34 rotates again to drive the positioning plate 44 and the No. 1 tightening strip 66 to clamp the milling blade 99, and the grinding head 2 starts processing. By adjusting the angle of the milling blade 99 multiple times and cooperating with the processing of the grinding head 2, the teeth of the milling blade 99 can be processed.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A cemented carbide milling insert grinding tool, comprising a grinding head (2), a fixing unit (3), an adjustment unit (5) and a clamping unit (6), characterized in that: The grinding head (2) is used for grinding the teeth of the milling blade (99); The adjustment unit (5) is used to drive the milling blade (99) to rotate, so that the milling blade (99) rotates in coordination with the grinding machine head (2); The abutting unit (6) comprises a first positioning frame (61) and a second positioning frame (69), wherein the first positioning frame (61) and the second positioning frame (69) are respectively used to abut against two side surfaces of the milling blade (99); The fixing unit (3) is drivingly connected to the first positioning frame (61) to drive the first positioning frame (61) to move in a direction away from or towards the second positioning frame (69); One end of the first positioning frame (61) close to the fixed plate (41) is fixedly connected to a first tightening strip (66); one side of the first tightening strip (66) is provided with a second tightening strip (68) for cooperating with the first tightening strip to clamp the milling blade (99); the second tightening strip (68) is fixedly connected to the upper end of the second positioning frame (69); one end of the second tightening strip (68) close to the first tightening strip (66) is flush with one end of the second positioning frame (69) close to the first tightening strip (66).

2. The cemented carbide milling insert grinding tool as claimed in claim 1, characterized in that: A tool base (1) is fixedly connected to one side of the grinding machine head (2), a fixing unit (3) is fixedly arranged on the tool base (1), the fixing unit (3) comprises a bottom plate (31), the bottom plate (31) is fixedly connected to the upper end surface of the tool base (1), a sliding groove (32) is provided in the bottom plate (31), a sliding base plate (33) is slidably connected in the sliding groove (32), a screw rod (35) is internally threadedly connected to the sliding base plate (33), a No. 1 motor (34) is also fixedly connected to the bottom plate (31), and an output shaft of the No. 1 motor (34) is fixedly connected to one end of the screw rod (35).

3. The cemented carbide milling insert grinding tool as claimed in claim 2, characterized in that: The adjustment unit (5) is fixedly connected to the sliding base plate (33), the adjustment unit (5) comprises a support (53), the support (53) is fixedly connected to the sliding base plate (33), a third motor (51) is fixedly connected to the support (53), and the third motor (51) is fixedly connected to the positioning unit (4) via a connecting plate (52).

4. The cemented carbide milling insert grinding tool as claimed in claim 3, characterized in that: The positioning unit (4) comprises the fixing disk (41), the fixing disk (41) and the connecting disk (52) being fixedly connected, one end of the fixing disk (41) close to the connecting disk (52) being fixedly connected to a protective cover (42), a second motor (43) being fixedly connected inside the protective cover (42), and an output shaft of the second motor (43) passing through the fixing disk (41) and then fixedly connected to the positioning disk (44).

5. The cemented carbide milling insert grinding tool as claimed in claim 4, characterized in that: The positioning plate (44) is provided with three guide grooves (48), each of which has a positioning rod (46) slidingly passing through it, and each of the positioning rods (46) is fixedly connected to a linkage rod (47) at one end close to the fixed plate (41), and the linkage rod (47) is rotatably connected to the fixed plate (41).

6. The cemented carbide milling insert grinding tool as claimed in claim 5, characterized in that: A central column (45) for loading a milling blade (99) is fixedly connected to the center of one side of the positioning plate (44) away from the fixed plate (41), and the positioning rods (46) are all retracted into the notch of the central column (45).

7. The cemented carbide milling insert grinding tool as claimed in claim 6, characterized in that: A slider (62) is fixedly connected to one end of the first positioning frame (61) away from the fixed plate (41); the slider (62) is slidably connected in a slide groove (64); the slide groove (64) is provided on the upper end surface of the bottom plate (31) and is located on both sides of the slide groove (32); a guide rod (65) is provided in the slide groove (64) for guiding the slider (62) to slide; the guide rod (65) and the slider (62) are slidably connected; an end of the slider (62) away from the No. 1 motor (34) is abutted against a spring (63); the spring (63) is nested on the guide rod (65).

8. The cemented carbide milling insert grinding tool as claimed in claim 7, characterized in that: One end of the No. 1 tightening strip (66) close to the No. 3 motor (51) abuts against a surface of the fixing plate (41) away from the No. 3 motor (51), and the other end of the No. 1 tightening strip (66) is flush with a surface of the positioning plate (44) away from the No. 3 motor (51). The second positioning frame (69) is fixedly connected to the upper end of the bottom plate (31), and an opening (610) is provided on the second positioning frame (69) for the positioning rod (46) to pass through.

9. The cemented carbide milling insert grinding tool as claimed in claim 8, characterized in that: The first tightening strip (66) and the second tightening strip (68) are both provided with a compensation structure (67), and the compensation structure (67) comprises a slide rail (671), and the slide rail (671) is provided on the first tightening strip (66) and the second tightening strip (68), and a slide bar (672) is slidably connected in the slide rail (671), and the slide bar (672) is fixed to the first tightening strip (66) and the second tightening strip (68) by a tightening screw (673).

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