Device and method for passivating cutting edge of welded hard alloy milling cutter

Abstract

The invention relates to the technical field of blade passivating treatment, in particular to a device and method for passivating a cutting edge of a welded hard alloy milling cutter. The device comprises a supporting cylinder, a plurality of connecting grooves are formed in the outer side wall of the supporting cylinder, moving plates are inserted into the connecting grooves, and mounting plates are fixedly connected to the upper ends of the moving plates; a plurality of grinding tables are fixedly connected to the upper end of the mounting plate, the grinding tables grind a cutting edge into different obtuse angles in sequence from right to left, a guide groove is formed in the lower end of the moving plate, a sliding frame is slidably connected into the guide groove, and an insertion positioning mechanism is arranged in the middle of the sliding frame and composed of an insertion plate, an insertion head, a linkage rod and a control plate; according to the cutting edge polishing device, a cutting edge can be polished in batches, polishing equipment is integrated, land occupation is reduced, the machining cost is reduced, and enterprises have more competitiveness.

Description

Technical Field

[0001] The invention relates to the technical field of blade passivation treatment, in particular to a device and method for passivating the cutting edge of a welded carbide milling cutter. Background Art

[0002] Milling machines are used to process the surface of workpieces during production. Some workpieces are made of hard materials, so to successfully process them, the cutting tools are typically made of super-hard alloys. The cutting tools require passivation before use to reduce stress concentration during cutting, significantly extending their lifespan. Super-hard cutting tools used in milling machines are brittle, and direct grinding can easily lead to fractures at the cutting edge. Therefore, many manufacturers employ multiple grinding cycles to gradually passivate the cutting edges. However, existing multiple grinding processes involve mounting the cutting tools on separate grinding machines for assembly-line processing. This requires multiple machines, space, and multiple operators, significantly increasing costs and reducing competitiveness. Furthermore, blades are ground in batches. If a problem occurs in one batch, subsequent processing errors can be significant. Quality inspections are primarily focused on the final product, leading to increased defective rates. Summary of the Invention

[0003] The object of the present invention is to provide a device and method for passivating the cutting edge of a welded carbide milling cutter, so as to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for passivating the cutting edge of a welded carbide milling cutter, comprising a support cylinder, a plurality of connecting grooves being provided on the outer side wall of the support cylinder, a movable plate being plugged into the connecting groove, a mounting plate being fixedly connected to the upper end of the movable plate, a plurality of grinding tables being fixedly connected to the upper end of the mounting plate, the grinding tables from right to left sequentially grinding the cutting edge into different obtuse angles, a guide groove being provided at the lower end of the movable plate, a sliding frame being slidably connected in the guide groove, a plug-in positioning mechanism being provided in the middle of the sliding frame, the plug-in positioning mechanism being composed of a plug-in plate, a plug connector, a linkage rod and a control panel The composition is that the plug-in positioning mechanism is used to position and fix the sliding frame at different positions of the movable plate. A movable positioning mechanism is provided inside the support cylinder. The movable positioning mechanism is composed of a positioning column, a positioning groove, a traction plate, a traction spring and a positioning ball. The movable positioning mechanism is used to control the height of the movable plate and the position of the grinding table, and to press the blade against the grinding groove. A magnet block is fixedly connected to the inner wall of the sliding frame, and the lower end of the sliding frame is fixedly connected to the traction plate. An auxiliary plate for controlling the movement and positioning of the plug-in positioning mechanism is plugged in the middle of the traction plate, and a magnetic ring is fixedly connected to the right side of the auxiliary plate.

[0005] Preferably, the traction plate is a cross-shaped structure, both ends of the traction plate pass through the support tube, a sliding opening is provided in the middle of the traction plate, both ends of the sliding opening pass through the traction plate, and both ends of the auxiliary plate pass through the sliding opening.

[0006] Preferably, the upper end of the traction spring is connected to the inner wall of the support tube, the lower end of the traction spring is connected to the cross portion of the traction plate, the positioning ball is embedded in the lower end of the traction plate, and the lower end of the positioning ball rests on the side wall of the positioning column.

[0007] Preferably, the positioning grooves and the grinding table correspond one to one, the mounting plate and the grinding table are both arc-shaped structures, a grinding groove is provided at the upper end of the grinding table, and the obtuse angle of the middle part of the grinding groove gradually increases from right to left.

[0008] Preferably, a guide groove is provided at the lower end of the movable plate, the guide groove is a prismatic structure, a plurality of clamping grooves are provided on both sides of the guide groove, the inner wall of the clamping groove is an arc structure, and the clamping grooves correspond to the polishing table one by one.

[0009] Preferably, the magnet block is located directly below the control panel, the control panel is an iron plate, the linkage rod is tilted, the lower end of the linkage rod is hinged to the upper end of the control panel, and the upper end of the linkage rod is hinged to the plug-in plate.

[0010] Preferably, the plug board is arranged horizontally, both ends of the plug board pass through the sliding frame, the plug connector is fixedly connected to the top of the plug board, the plug connector is a spherical structure, and the plug connector is used to position the movable plate at different positions and to place the grinding table against the blade.

[0011] Preferably, the auxiliary plate is slidably connected in the connecting groove, and the top end of the auxiliary plate is fixedly connected with a pressing head, the right side of the pressing head is an arc structure, and the pressing head is located on the left side of the traction plate.

[0012] Preferably, an auxiliary head is fixedly connected to the upper end of the control board, and the auxiliary head is a hook-shaped structure. When the control board is adsorbed on the magnet block, the auxiliary head rests against the side end of the pressing head.

[0013] A method for a welded carbide milling cutter edge passivation device, comprising the following steps: Step 1: Align the blade with the grinding groove in the middle of the first grinding table on the right. The support tube drives the grinding table to rotate. The first grinding table performs the initial grinding on the blade to blunt the blade to a slight arc. Step 2: After the initial grinding is completed, the movable plate is pushed to move. At this time, the positioning ball is located in the positioning groove, and the grinding table moves toward the support tube. When the second grinding table is aligned with the blade, the support tube drives the grinding table to rotate again, and the blade is ground for the second time to blunt the blade to an angle arc. Step 3: Repeat the steps in step 2, align the third grinding table with the blade, and grind the blade for the third time to complete the passivation of the blade; Step 4: After removing the blade, reset the moving plate and positioning column and proceed to the next blade passivation process.

[0014] Compared with the prior art, the present invention has the following beneficial effects: First, by controlling the movement of the movable plate and the grinding table, the grinding tables at different positions are aligned with the blade in sequence, and the blade is ground, thereby gradually passivating the blade, effectively avoiding the problem of blade breakage during grinding, and avoiding the occurrence of defective rate; Second, the traditional assembly line processing method is integrated into one device, which greatly reduces the land occupation, equipment and labor expenses, reduces production costs, and makes the product more competitive; 3. When one of the grinding tables is severely worn, it can be quickly discovered during the inspection of the finished product, avoiding excessive defective products and reducing the company's losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the internal connections of the device.

[0016] Figure 2 This is a connection diagram of the mobile plate plug-in positioning mechanism.

[0017] Figure 3 This is a schematic diagram of the connection between the auxiliary head and the top pressure head.

[0018] In the figure: 1 support cylinder, 2 movable plate, 3 mounting plate, 4 grinding table, 5 drive disk, 6 movable positioning mechanism, 61 positioning column, 62 positioning groove, 63 traction plate, 64 traction spring, 65 positioning ball, 7 magnetic ring, 8 auxiliary plate, 9 fixed plate, 10 electromagnet, 11 drive cylinder, 12 sliding port, 13 auxiliary head, 14 guide groove, 15 clamping groove, 16 sliding frame, 17 plug-in positioning mechanism, 171 plug-in plate, 172 plug connector, 173 linkage rod, 174 control board, 18 magnet block, 19 top pressure head. DETAILED DESCRIPTION

[0019] In order to deepen the understanding and recognition of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described and introduced in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the present embodiments in any form. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-3The present invention provides a technical solution: a device for passivating the cutting edge of a welded carbide milling cutter, comprising a support cylinder 1, a plurality of connecting grooves being provided on the outer wall of the support cylinder 1, a movable plate 2 being inserted into the connecting groove, a mounting plate 3 being fixedly connected to the upper end of the movable plate 2, a plurality of grinding tables 4 being fixedly connected to the upper end of the mounting plate 3, the grinding tables 4 from right to left grind the cutting edge into different obtuse angles in turn, a guide groove 14 being provided at the lower end of the movable plate 2, a sliding frame 16 being slidably connected in the guide groove 14, a plug-in positioning mechanism 17 being provided in the middle of the sliding frame 16, the plug-in positioning mechanism 17 being composed of a plug-in plate 171, a plug-in connector 172, a linkage rod 173 and a control panel 174, The connecting and positioning mechanism 17 is used to position and fix the sliding frame 16 at different positions of the movable plate 2. A movable positioning mechanism 6 is provided inside the support cylinder 1. The movable positioning mechanism 6 consists of a positioning column 61, a positioning groove 62, a traction plate 63, a traction spring 64 and a positioning ball 65. The movable positioning mechanism 6 is used to control the height of the movable plate 2 and the position of the grinding table 4, and to abut the blade against the grinding groove. A magnet block 18 is fixedly connected to the inner wall of the sliding frame 16, and the lower end of the sliding frame 16 is fixedly connected to the traction plate 63. An auxiliary plate 8 for controlling the movement and positioning of the connecting and positioning mechanism 17 is inserted in the middle of the traction plate 63, and a magnetic ring 7 is fixedly connected to the right side of the auxiliary plate 8.

[0021] The left side of the positioning column 61 is fixedly connected to a driving disk 5, and the left side of the movable plate 2 is inlaid with a ball, and the ball rests on the side end of the driving disk 5. The driving disk 5 can squeeze the movable plate 2, push the movable plate 2 to move, and drive the positioning column 61 to move together. The right side of the support cylinder 1 is fixedly connected to a driving cylinder 11, and the right side of the driving cylinder 11 is fixedly connected to a rotating shaft. Fixed plates 9 are provided on both sides of the driving cylinder 11, and the side ends of the fixed plates 9 are fixedly connected to electromagnets 10. The electromagnet 10 is facing the magnetic ring 7. When the electromagnet 10 is energized, it can generate an adsorption force on the magnetic ring 7, thereby pulling the magnetic ring 7 and the auxiliary plate 8 to move. The driving cylinder 11 drives the support cylinder 1 to rotate, thereby driving the grinding table 4 to grind the blade.

[0022] The traction plate 63 is a cross-shaped structure. Both ends of the traction plate 63 pass through the support tube 1. A sliding opening 12 is provided in the middle of the traction plate 63. Both ends of the sliding opening 12 pass through the traction plate 63, and both ends of the auxiliary plate 8 pass through the sliding opening 12. The upper end of the traction spring 64 is connected to the inner wall of the support tube 1, and the lower end of the traction spring 64 is connected to the cross part of the traction plate 63. The positioning ball 65 is embedded in the lower end of the traction plate 63, and the lower end of the positioning ball 65 abuts against the side wall of the positioning column 61. When the positioning column 61 moves, the traction plate 63 is guided by the positioning groove 62 and the extrusion of the traction spring 64, and the traction plate 63 moves, and the positioning ball 65 is clamped into the positioning groove, thereby moving the grinding table 4 and the blade away from each other. At the same time, the movable plate 2 is squeezed and moved, moving the next grinding table 4 to the blade, and the positioning ball 65 moves to the surface of the positioning column 61, and the grinding groove at the side end of the grinding table 4 abuts against the blade, so that the blade is processed again.

[0023] The positioning groove 62 corresponds to the grinding table 4 one by one. The mounting plate 3 and the grinding table 4 are both arc-shaped structures. A grinding groove is provided at the upper end of the grinding table 4. The obtuse angle of the middle part of the grinding groove gradually increases from right to left. The blade is ground step by step by the grinding tables 4 at different positions, and the cutting edge of the blade is gradually ground into different obtuse angles until it is formed, thereby avoiding the cutting edge of the blade from breaking due to rapid grinding.

[0024] A guide groove 14 is provided at the lower end of the movable plate 2. The guide groove 14 has a prismatic structure. A plurality of snap-in grooves 15 are provided on both sides of the guide groove 14. The inner wall of the snap-in groove 15 is an arc-shaped structure. The snap-in groove 15 corresponds one-to-one to the grinding table 4. The magnet block 18 is located directly below the control plate 174. The control plate 174 is an iron plate. The linkage rod 173 is tilted. The lower end of the linkage rod 173 is hinged to the upper end of the control plate 174. The upper end of the linkage rod 173 is hinged to the plug-in plate 171. When the movable plate 2 is squeezed, the sliding frame 16 moves in the middle of the guide groove 14, thereby moving the grinding table 4 at different positions to the sliding frame 16.

[0025] The plug board 171 is set horizontally, and both ends of the plug board 171 pass through the sliding frame 16. The plug connector 172 is fixedly connected to the top of the plug board 171. The plug connector 172 is a spherical structure. The plug connector 172 is used to position the movable plate 2 at different positions and to press the grinding table 4 against the blade. The auxiliary plate 8 is slidably connected in the connecting groove. The top of the auxiliary plate 8 is fixedly connected to the top of the auxiliary plate 8 with a top pressure head 19. The right side of the top pressure head 19 is an arc-shaped structure. The top pressure head 19 is located on the left side of the traction plate 63. The upper end of the control board 174 is fixedly connected with an auxiliary head 13. The auxiliary head 13 is a hook-shaped structure. When the control board 174 is adsorbed on the magnet block 18, the auxiliary head 13 presses against the top pressure head 1 9, when the electromagnet 10 is energized, it can generate an adsorption force on the magnetic ring 7, thereby pulling the magnetic ring 7 and the auxiliary plate 8 to move, and the auxiliary plate squeezes the auxiliary head 13 through the top pressure head, thereby lifting the control board 174, and the control board 174 drives the plug-in board 171 to move through the linkage rod 173, thereby plugging the plug connector 172 into the card slot 15, positioning the movable plate 2 and the grinding table 4, and placing the grinding table 4 facing the blade. When the position of the grinding block 4 needs to be replaced, the electromagnet 10 is de-energized, and the magnet block 18 adsorbs the control board 174, thereby moving the control board 174 downward and separating the plug connector 172 from the card slot 15.

[0026] A method for a welded carbide milling cutter edge passivation device, comprising the following steps: Step 1: Align the blade with the grinding groove in the middle of the first grinding table 4 on the right. The support tube 1 drives the grinding table 4 to rotate. The first grinding table 4 performs the initial grinding on the blade to blunt the blade into a small arc. Step 2: After the initial grinding is completed, the electromagnet 10 is powered off, and the magnet block 18 adsorbs the control plate 174, so that the control plate 174 moves downward, the plug connector 172 is separated from the card slot 15, and the movable plate 2 is unlocked. The movable plate 2 is pushed to move by the driving disk 5, and the driving disk 5 also drives the positioning column 61 to move together. At this time, the positioning ball 65 is located in the positioning groove 62, and the grinding table 4 moves toward the direction of the support tube 1. When the second grinding table 4 is aligned with the blade, the positioning ball is located on the surface of the positioning column 61, and the second grinding table 4 is engaged with the blade. At this time, the movable plate 2 is locked and fixed again, and the support tube 1 drives the grinding table 4 to rotate again, and the blade is ground for the second time to passivate the blade to an angle arc; Step 3: Repeat the steps of step 2, align the third grinding table 4 with the blade, and grind the blade for the third time to complete the passivation of the blade; Step 4: After removing the blade, reset the movable plate 2 and the positioning column 61 and proceed to the next blade passivation process.

[0027] Although the embodiments of the present invention have been shown and described, it should be emphasized that the above description is merely an introduction and description of the use of the embodiments of the present invention and is not intended to limit the present invention in any way. Those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for passivating the cutting edge of a welded carbide milling cutter, comprising a support cylinder (1), characterized in that: The outer wall of the support cylinder (1) is provided with a plurality of connection grooves, a movable plate (2) is inserted into the connection groove, the upper end of the movable plate (2) is fixedly connected to a mounting plate (3), the upper end of the mounting plate (3) is fixedly connected to a plurality of grinding tables (4), and the grinding tables (4) from right to left sequentially grind the blade into different obtuse angles; The lower end of the movable plate (2) is provided with a guide groove (14), a sliding frame (16) is slidably connected in the guide groove (14), a plug-in positioning mechanism (17) is provided in the middle of the sliding frame (16), the plug-in positioning mechanism (17) is composed of a plug-in plate (171), a plug connector (172), a linkage rod (173) and a control plate (174), and the plug-in positioning mechanism (17) is used to position and fix the sliding frame (16) at different positions of the movable plate (2); A movable positioning mechanism (6) is provided inside the support cylinder (1), and the movable positioning mechanism (6) is composed of a positioning column (61), a positioning groove (62), a traction plate (63), a traction spring (64) and a positioning ball (65). The movable positioning mechanism (6) is used to control the height of the movable plate (2) and the position of the grinding table (4), and to bring the blade and the grinding groove into contact with each other; A magnet block (18) is fixedly connected to the inner wall of the sliding frame (16), the lower end of the sliding frame (16) is fixedly connected to the traction plate (63), an auxiliary plate (8) for controlling the movement and positioning of the plug-in positioning mechanism (17) is inserted in the middle of the traction plate (63), and a magnetic ring (7) is fixedly connected to the right side of the auxiliary plate (8); The left side of the positioning column (61) is fixedly connected to the driving disk (5), the left side of the movable plate (2) is inlaid with a ball, and the ball rests on the side end of the driving disk (5). The right side of the support cylinder (1) is fixedly connected to the driving cylinder (11), and the right side of the driving cylinder (11) is fixedly connected to the rotating shaft. Fixed plates (9) are provided on both sides of the driving cylinder (11), and the side end of the fixed plate (9) is fixedly connected to an electromagnet (10), and the electromagnet (10) is directly opposite to the magnetic ring (7).

2. The device for passivating the cutting edge of a welded carbide milling cutter according to claim 1, characterized in that: The traction plate (63) is a cross-shaped structure. Both ends of the traction plate (63) pass through the support tube (1). A sliding opening (12) is provided in the middle of the traction plate (63). Both ends of the sliding opening (12) pass through the traction plate (63). Both ends of the auxiliary plate (8) pass through the sliding opening (12).

3. The device for passivating the cutting edge of a welded carbide milling cutter according to claim 1, characterized in that: The upper end of the traction spring (64) is connected to the inner wall of the support tube (1), the lower end of the traction spring (64) is connected to the cross portion of the traction plate (63), the positioning ball (65) is embedded in the lower end of the traction plate (63), and the lower end of the positioning ball (65) abuts against the side wall of the positioning column (61).

4. The device for passivating the cutting edge of a welded carbide milling cutter according to claim 1, characterized in that: The positioning groove (62) and the grinding table (4) correspond one to one. The mounting plate (3) and the grinding table (4) are both arc-shaped structures. The upper end of the grinding table (4) is provided with a grinding groove, and the obtuse angle size of the middle part of the grinding groove gradually increases from right to left.

5. The device for passivating the cutting edge of a welded carbide milling cutter according to claim 1, characterized in that: A guide groove (14) is provided at the lower end of the movable plate (2), and the guide groove (14) has a prismatic structure. A plurality of clamping grooves (15) are provided on both sides of the guide groove (14), and the inner wall of the clamping groove (15) has an arc-shaped structure. The clamping grooves (15) correspond to the grinding table (4) one by one.

6. The device for passivating the cutting edge of a welded carbide milling cutter according to claim 1, characterized in that: The magnet block (18) is located directly below the control plate (174). The control plate (174) is an iron plate. The linkage rod (173) is tilted. The lower end of the linkage rod (173) is hinged to the upper end of the control plate (174). The upper end of the linkage rod (173) is hinged to the plug plate (171).

7. The device for passivating the cutting edge of a welded carbide milling cutter according to claim 1, characterized in that: The plug plate (171) is arranged horizontally, and both ends of the plug plate (171) pass through the sliding frame (16). The plug connector (172) is fixedly connected to the top of the plug plate (171). The plug connector (172) is a spherical structure. The plug connector (172) is used to position the movable plate (2) at different positions and to place the grinding table (4) against the blade.

8. The device for passivating the cutting edge of a welded carbide milling cutter according to claim 1, characterized in that: The auxiliary plate (8) is slidably connected in the connecting groove, and a top pressure head (19) is fixedly connected to the top of the auxiliary plate (8). The right side of the top pressure head (19) is an arc-shaped structure, and the top pressure head (19) is located on the left side of the traction plate (63).

9. The device for passivating the cutting edge of a welded carbide milling cutter according to claim 1, characterized in that: The upper end of the control plate (174) is fixedly connected to an auxiliary head (13), and the auxiliary head (13) is a hook-shaped structure. When the control plate (174) is adsorbed on the magnet block (18), the auxiliary head (13) abuts against the side end of the top pressure head (19).

10. A method for passivating the edge of a welded carbide milling cutter according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Align the blade with the grinding groove in the middle of the first grinding table (4) on the right side, and the support tube (1) drives the grinding table (4) to rotate. The first grinding table (4) performs the initial grinding on the blade to blunt the blade to form a small arc; Step 2: After the initial grinding is completed, the movable plate (2) is pushed to move, at which time the positioning ball (65) is located in the positioning groove (62), and the grinding table (4) moves toward the support tube (1). After the second grinding table (4) is aligned with the blade, the support tube (1) drives the grinding table (4) to rotate again, and the blade is ground for the second time to blunt the blade to form an angle arc; Step 3: Repeat the steps of step 2, align the third grinding table (4) with the blade, and grind the blade for the third time to complete the passivation of the blade; Step 4: After the blade is removed, the movable plate (2) and the positioning column (61) are reset and the next blade passivation process is carried out.

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