Milling cutter with tip and cutter handle convenient to replace for press roll drilling

Abstract

The utility model relates to a milling cutter convenient to replace a pointed end and a cutter handle for a press roll rotating hole, which comprises a cutter rest, a guide groove is arranged on the peripheral side of the cutter rest, a slot is arranged at the bottom end of the cutter rest close to the guide groove, cutter teeth are arranged inside the slot, and an extension groove is arranged at the top end inside the slot. The utility model relates to the technical field of drilling milling cutters. According to the milling cutter convenient for replacing the pointed end and the cutter handle for the press roll rotating hole, when the cutter frame is deformed due to cutter collision, the locking pin is positioned in the cutter frame, so that the locking pin is difficult to be subjected to external impact force, the hole wall of the through hole is mutually attached to the outer wall of the locking pin, and the hole wall of the through hole and the outer wall of the locking pin are smooth; therefore, when the tool rest deforms, compared with a threaded installation mode, the problem that the locking pin is clamped through the through hole is difficult to occur, and the purpose of conveniently disassembling the tool teeth can be achieved when the tool rest deforms and needs to be replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling milling cutters, in particular to a milling cutter for drilling holes in a pressing roller, which is convenient for replacing a tip and a handle. Background Art

[0002] A drilling milling cutter is a rotating tool with one or more teeth used for milling. When working, each tooth cuts off the excess of the workpiece intermittently in sequence. The milling cutter is mainly used to process planes, steps, grooves, forming surfaces and cut off workpieces on milling machines.

[0003] A milling cutter generally consists of a tool holder and cutter teeth. The cutter teeth are made of carbide or other wear-resistant tool materials. The cutter teeth and tool holder are generally fixed and connected by screws.

[0004] In the process of milling the equipment, generally only the teeth of the cutter will be worn to a greater extent, while the probability of wear on the tool holder is small. In order to reduce costs, only the damaged part will be replaced.

[0005] However, when a collision occurs, since the hardness of the cutter teeth is much greater than that of the cutter holder, the possibility of the cutter holder breaking is greater than the possibility of the cutter teeth breaking. At this time, the screw holes in the cutter holder used to install the screws are prone to deformation, causing the threads in the screw holes to deform, making it impossible for the screws to rotate, and making it difficult to disassemble and replace the cutter teeth and the cutter holder. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a milling cutter for turning holes in a press roll, which is easy to replace the tip and the handle, so as to solve the technical problems mentioned in the above background technology.

[0007] The above technical objectives of the utility model are achieved through the following technical solutions:

[0008] A milling cutter for rotating holes in a press roll, which is convenient for replacing a tip and a handle, comprises a cutter holder, a guide groove is provided on the outer peripheral side of the cutter holder, a slot is provided at the bottom end of the cutter holder near the guide groove, a cutter tooth is installed inside the slot, an extension groove is provided at the top end of the slot, and the extension groove penetrates the milling cutter and extends to the inside of the adjacent guide groove;

[0009] A mounting groove is provided on the groove wall of the guide groove at a position corresponding to the extension groove, a limiting plate is provided inside the mounting groove, a pressing block is provided at the bottom end of the limiting plate at a position corresponding to the extension groove, a pin hole is provided inside the limiting plate, a through hole is provided at a position of the guide groove corresponding to the pin hole, and a locking pin is provided inside the through hole.

[0010] Furthermore, an expansion head is provided at one end of the locking pin.

[0011] Furthermore, an epitaxial hole is provided at a position of the through hole corresponding to the expansion head, and the diameter of the epitaxial hole is equal to the diameter of the expansion head.

[0012] Furthermore, two guide rails are provided on one side of the limit plate, guide blocks are slidably provided inside the guide rails, and the two guide blocks are commonly and fixedly connected to a fixed plug plate.

[0013] Furthermore, a limiting groove matching with the fixing plug plate is formed on the outer surface of the locking pin.

[0014] Furthermore, a positioning rod is provided on one side of the pressing block, and a positioning hole matching with the positioning rod is provided on the side wall of the knife tooth.

[0015] In summary, the present invention includes at least one of the following beneficial technical effects:

[0016] 1. The milling cutter for rotating holes in a press roll, which is easy to replace the tip and the handle, when the tool holder is deformed due to collision, the locking pin is located inside the tool holder, so the locking pin is not easily affected by external impact force, and the hole wall of the through hole fits the outer wall of the locking pin, and the hole wall of the through hole and the outer wall of the locking pin are smooth. Therefore, when the tool holder is deformed, it is difficult to clamp the locking pin by the through hole compared with the threaded installation method, and thus when the tool holder is deformed and needs to be replaced, the purpose of facilitating the removal of the cutter teeth can be achieved;

[0017] 2. A milling cutter for rotating holes in a press roll that is easy to replace the tip and the handle. After installing the limit plate and inserting the locking pin into the pin hole to fix the limit plate, press the fixed plug plate downward to move the fixed plug plate downward along the straight line direction of the guide rail. At this time, both sides of the fixed plug plate will be stuck in the inside of the limit grooves on both sides. Since the side of the fixed plug plate away from the guide block is an arc surface, the locking pin and the limit plate will be pushed away from each other during the downward movement of the fixed plug plate, so that the limit plate is close to the installation groove, thereby increasing the pressure of the pressure block on the knife teeth, thereby achieving the purpose of improving the stability of the knife teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1The utility model is a schematic structural diagram of a milling cutter for rotating holes in a press roll, which is convenient for replacing the tip and the handle.

[0020] Figure 2 A cutter holder for a milling cutter for rotating holes in a press roll, which is convenient for replacing the tip and the handle of the utility model. Figure 1 .

[0021] Figure 3 A cutter holder for a milling cutter for rotating holes in a press roll, which is convenient for replacing the tip and the handle of the utility model. Figure 2 .

[0022] Figure 4 The utility model is a schematic structural diagram of a locking pin and a limiting plate of a milling cutter for rotating holes in a press roll, which is convenient for replacing the tip and the handle.

[0023] Figure 5 The utility model is a schematic structural diagram of a limit plate and a fixed plug plate of a milling cutter for rotating holes of a press roll, which is convenient for replacing the tip and the handle.

[0024] In the figure, 1, tool holder; 2, guide groove; 3, slot; 4, tool teeth; 5, extension groove; 6, mounting groove; 7, limit plate; 8, pressure block; 9, pin hole; 10, through hole; 11, locking pin; 12, expansion head; 13, extension hole; 14, guide rail; 15, guide block; 16, fixed plug plate; 17, limit groove; 18, positioning plug rod; 19, positioning plug hole. DETAILED DESCRIPTION

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0026] Example:

[0027] Reference Figure 1-Figure 5 The utility model discloses a milling cutter for rotating holes in a press roll, which is convenient for replacing a tip and a handle, comprising a cutter holder 1, a guide groove 2 is provided on the outer peripheral side of the cutter holder 1, a slot 3 is provided at the bottom end of the cutter holder 1 near the guide groove 2, a cutter tooth 4 is installed inside the slot 3, an extension groove 5 is provided at the top end of the slot 3, and the extension groove 5 passes through the milling cutter and extends to the inside of the adjacent guide groove 2;

[0028] A mounting groove 6 is provided on the groove wall of the guide groove 2 at a position corresponding to the extension groove 5, a limiting plate 7 is provided inside the mounting groove 6, a pressing block 8 is provided at the bottom end of the limiting plate 7 at a position corresponding to the extension groove 5, a pin hole 9 is provided inside the limiting plate 7, a through hole 10 is provided at a position of the guide groove 2 corresponding to the pin hole 9, and a locking pin 11 is provided inside the through hole 10.

[0029] In this embodiment, the blade tooth 4 is inserted into the slot 3, and the top end of the blade tooth 4 is in contact with the top wall of the slot 3, and then the limit plate 7 is buckled in the installation slot 6, and the pressing block 8 is inserted into the extension slot 5, so that the pressing block 8 is in contact with the side wall of the blade tooth 4. At this time, the blade tooth 4 is pre-installed on the bottom end of the tool holder 1, and the locking pin 11 is inserted into the pin hole 9 along the through hole 10 to fix the limit plate 7 in the installation slot 6, thereby achieving the effect of fixing the blade tooth 4, and the locking pin 11 is in interference connection with the pin hole 9, so as to achieve the purpose of fixing the limit plate 7;

[0030] When replacing the cutter tooth 4, it is only necessary to pull out the locking pin 11 and then remove the limit plate 7 from the inside of the mounting groove 6, so that the cutter tooth 4 and the cutter holder 1 can be easily separated;

[0031] When the tool holder 1 is deformed due to a collision with the tool, since the locking pin 11 is located inside the tool holder 1, the locking pin 11 is not easily affected by external impact force, and the hole wall of the through hole 10 fits the outer wall of the locking pin 11, and the hole wall of the through hole 10 and the outer wall of the locking pin 11 are smooth, so when the tool holder 1 is deformed, it is difficult for the through hole 10 to clamp the locking pin 11;

[0032] When the collision with the knife fails to fix the locking pin 11 inside the through hole 10, the locking pin 11 and the limit plate 7 can be effectively separated from each other. Since the limit plate 7 is directly inserted into the inside of the installation groove 6, the limit plate 7 can be easily removed from the inside of the installation groove 6 after the locking pin 11 is disengaged. At this time, the limit plate 7 and the pressure block 8 will not exert pressure on the knife teeth 4, so the effect of facilitating the removal of the knife teeth 4 can be effectively achieved.

[0033] In a further preferred embodiment of the present invention, Figure 1-5 As shown, an expansion head 12 is provided at one end of the locking pin 11 .

[0034] In this embodiment, the expansion head 12 is provided to limit the locking pin 11 .

[0035] In a further preferred embodiment of the present invention, Figure 1-5 As shown, an extension hole 13 is provided at a position of the through hole 10 corresponding to the expansion head 12 , and the aperture of the extension hole 13 is equal to the diameter of the expansion head 12 .

[0036] In this embodiment, by providing the extension hole 13 , after the locking pin 11 is inserted into the through hole 10 , the expansion head 12 is inserted back into the extension hole 13 to achieve the purpose of limiting the locking pin 11 .

[0037] In a further preferred embodiment of the present invention, Figure 1-5As shown, two guide rails 14 are provided on one side of the limit plate 7 , guide blocks 15 are slidably provided inside the guide rails 14 , and a fixed plug plate 16 is fixedly connected to the two guide blocks 15 .

[0038] In this embodiment, the guide rail 14 and the guide block 15 are used to install the fixed plug plate 16. The setting of the fixed plug plate 16, in conjunction with the locking pin 11, is used to further improve the tightness of the fit between the limit plate 7 and the installation groove 6, so as to increase the pressure of the limit plate 7 and the pressure block 8 on the knife tooth 4, thereby achieving the purpose of improving the stability of the knife tooth 4.

[0039] In a further preferred embodiment of the present invention, Figure 1-5 As shown, the outer surface of the locking pin 11 is provided with a limiting groove 17 which matches with the fixing plug plate 16 .

[0040] After the limit plate 7 is installed and the locking pin 11 is inserted into the pin hole 9 to fix the limit plate 7, the fixing plug plate 16 is pressed downward to make the fixing plug plate 16 move downward along the straight line direction of the guide rail 14. At this time, the two sides of the fixing plug plate 16 will be stuck in the inside of the limiting grooves 17 on both sides. Since the side of the fixing plug plate 16 away from the guide block 15 is set as an arc surface, the locking pin 11 and the limit plate 7 will be pushed away from each other during the downward movement of the fixing plug plate 16. However, since the expansion head 12 at one end of the locking pin 11 is stuck in the inside of the extension hole 13, the fixing plug plate 16 will push the limit plate 7 to fit tightly with the installation groove 6, thereby increasing the pressure of the pressure block 8 on the knife tooth 4, thereby achieving the purpose of improving the stability of the knife tooth 4, and at the same time, it can effectively improve the stability of the connection between the limit plate 7 and the installation groove 6.

[0041] In a further preferred embodiment of the present invention, Figure 1-5 As shown, a positioning rod 18 is provided on one side of the pressing block 8 , and a positioning hole 19 matched with the positioning rod 18 is opened on the side wall of the blade tooth 4 .

[0042] In this embodiment, by providing the positioning rod 18 and the positioning slot 3, when the pressure block 8 contacts the blade tooth 4 and presses the blade tooth 4, the positioning rod 18 will be inserted into the positioning socket 19 to further improve the stability of the blade tooth 4.

[0043] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A milling cutter for turning holes in a press roll, which is easy to replace the tip and the handle, characterized in that: The tool holder (1) comprises a guide groove (2) on the outer peripheral side of the tool holder (1), a slot (3) is provided at the bottom end of the tool holder (1) near the guide groove (2), a cutter tooth (4) is installed inside the slot (3), an extension groove (5) is provided at the top end of the slot (3), and the extension groove (5) passes through the milling cutter and extends to the inside of the adjacent guide groove (2); A mounting groove (6) is provided at a position of the groove wall of the guide groove (2) corresponding to the extension groove (5), a limiting plate (7) is provided inside the mounting groove (6), a pressing block (8) is provided at a position of the bottom end of the limiting plate (7) corresponding to the extension groove (5), a pin hole (9) is provided inside the limiting plate (7), a through hole (10) is provided at a position of the guide groove (2) corresponding to the pin hole (9), and a locking pin (11) is provided inside the through hole (10).

2. A milling cutter for turning holes in a press roll with easy replacement of the tip and the handle according to claim 1, characterized in that: An expansion head (12) is provided at one end of the locking pin (11).

3. A milling cutter for turning holes in a press roll with easy replacement of the tip and the handle according to claim 2, characterized in that: An extension hole (13) is provided at a position of the through hole (10) corresponding to the expansion head (12), and the diameter of the extension hole (13) is equal to the diameter of the expansion head (12).

4. A milling cutter for turning holes in a press roll with easy replacement of the tip and the handle according to claim 3, characterized in that: Two guide rails (14) are provided on one side of the limit plate (7), guide blocks (15) are slidably arranged inside the guide rails (14), and the two guide blocks (15) are fixedly connected to a fixed plug plate (16).

5. A milling cutter for turning holes in a press roll with easy replacement of the tip and the handle according to claim 4, characterized in that: The outer surface of the locking pin (11) is provided with a limiting groove (17) which matches the fixing plug plate (16).

6. A milling cutter for turning holes in a press roll with easy replacement of the tip and the handle according to claim 5, characterized in that: A positioning rod (18) is provided on one side of the pressing block (8), and a positioning hole (19) matching with the positioning rod (18) is provided on the side wall of the blade tooth (4).

Images