Milling cutter with overheating protection function

Abstract

The utility model discloses a milling cutter with an overheating protection function. The milling cutter comprises a main body structure, the main body structure comprises a cutter head and a cutter handle, and the upper end of the cutter head is connected with the lower end of the cutter handle; the cooling mechanism is arranged in the cutter handle and is used for protecting the cutter head from overheating; the cooling mechanism comprises a first cavity and a second cavity which are formed in the cutter handle, the first cavity is used for storing cooling liquid, a piston plate is installed in the second cavity in a sliding and sealing mode, and multiple sets of cooling holes communicating with the second cavity are formed in the outer wall of the second cavity in a surrounding mode. A first threaded hole used for filling cooling liquid is formed in the top of the first cavity, a plug is installed in the threaded hole, and a through hole communicating with the second cavity is formed in the inner bottom of the first cavity. And through the arrangement of the cooling mechanism, an overheating protection effect on the cutter head can be achieved, cutter damage, machining quality reduction and machine tool faults caused by overheating of the milling cutter are effectively prevented, and production safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of milling cutter equipment, in particular to a milling cutter with an overheating protection function. Background Art

[0002] A milling cutter is a rotary tool used for milling. It can have one or more teeth and is used to process various planes, steps, grooves, formed surfaces, and cut off workpieces on a milling machine. The design and structure of milling cutters are varied to meet different processing requirements and improve processing efficiency. The cutter head of a milling cutter is usually the cutting part of the tool, while the shank is the part used to mount the milling cutter and connect to the machine tool spindle. The cutter head and shank can be integrally formed or replaceable so that different types of cutter heads can be replaced as needed. The material of the milling cutter is usually required to have high hardness, wear resistance, good heat resistance, and sufficient strength and toughness to adapt to high-speed cutting and withstand the impact and vibration generated during the cutting process.

[0003] After searching, the Chinese patent application number is: CN201611145526.4, which discloses a ball-end milling cutter, including a tool body and a cutting portion located at one end of the tool body, the cutting portion including two ball-end cutting edges located at the axial end face of the tool body and two spiral cutting edges located at the circumferential face of the tool body, the ball-end cutting edges and the spiral cutting edges correspond to each other one by one and are smoothly connected, the ball-end cutting edges have a back cutting surface, the back cutting surfaces of the two ball-end cutting edges intersect at the ball head vertex X of the ball head cutting edges to form a transverse edge, and the transverse edge is formed into a small plane for cutting after grinding. The ball-end milling cutter of this invention is not easy to wear at the ball head vertex X, and the processing surface quality is better, which can effectively avoid the problems of excessive wear of the transverse edge and premature failure of the coating, and improve the surface processing quality and durability of the tool.

[0004] The above-mentioned milling cutters and traditional milling cutters lack overheating protection function. When the milling cutter works at high load for a long time or the cutting conditions are poor, the milling cutter is very likely to heat up due to friction. If the temperature exceeds the material's tolerance limit, it will cause increased tool wear, reduced hardness or even breakage. It will also cause damage to the workpiece and may cause irreversible damage to the machine tool. Therefore, we need to propose a milling cutter with overheating protection function. Utility Model Content

[0005] The purpose of the utility model is to provide a milling cutter with an overheating protection function. The device has a simple structure and is easy to use. Through the setting of a cooling mechanism, it can provide overheating protection for the cutter head, effectively prevent tool damage, reduced processing quality and machine tool failure caused by overheating of the milling cutter, ensure production safety, and solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the utility model provides the following technical solutions:

[0007] A milling cutter with an overheat protection function, comprising:

[0008] A main body structure;

[0009] The main body structure includes a cutter head and a cutter handle, and the upper end of the cutter head is connected to the lower end of the cutter handle;

[0010] It further includes a cooling mechanism arranged in the cutter handle for providing overheat protection to the cutter head;

[0011] The cooling mechanism includes a first cavity and a second cavity opened in the cutter handle. The first cavity is used for storing coolant, a piston plate is slidably and sealingly installed in the second cavity, a plurality of groups of cooling holes communicating with the second cavity are circumferentially opened on the outer wall of the second cavity, a first threaded hole for filling coolant is opened at the top of the first cavity, a plug is installed in the threaded hole, and a through hole communicating with the second cavity is opened at the inner bottom of the first cavity.

[0012] Preferably, the plug is installed inside the first threaded hole by means of threaded connection, and a knob is arranged at the top of the plug.

[0013] Preferably, a connecting rod is arranged at the lower end of the piston plate, and a movable groove is opened at the center of the upper end of the cutter head.

[0014] Preferably, the connecting rod is slidably inserted into the movable groove, and a compression spring is sleeved on the connecting rod between the piston plate and the upper end face of the cutter head.

[0015] Preferably, a clamping edge is arranged at the lower end of the cutter handle, a slot is opened at the upper end of the cutter head, and the clamping edge is inserted into the slot and fixed by a positioning screw.

[0016] Preferably, a first positioning hole is opened on the clamping edge, a second positioning hole corresponding to the first positioning hole is opened on the outer wall of the slot, and a second threaded hole corresponding to the positioning screw is opened on the inner wall of the slot.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] 1. The utility model is provided with a main body structure including a cutter head and a cutter handle, and a cooling mechanism including a first cavity and a second cavity is arranged in the cutter handle. The first cavity is filled with coolant, a piston plate is slidably and sealingly arranged in the second cavity, and the first cavity and the second cavity are communicated through a through hole. Cooling holes are opened on the outer wall of the second cavity. The device has a simple structure and is convenient to use. Through the setting of the cooling mechanism, overheat protection can be provided to the cutter head, effectively preventing tool damage, decline in processing quality and machine tool failure caused by overheating of the milling cutter, and ensuring production safety;

[0019] 2. By setting a clamping edge with a first positioning hole at the lower end of the tool shank, and correspondingly setting a slot with a second positioning hole at the top of the tool head, and arranging a second threaded hole for installing a positioning screw on the inner wall of the slot, such a design can enable quick and convenient combined use and disassembly adjustment between the tool head and the tool shank compared with an integrally formed milling cutter, facilitating the replacement of the type of tool head according to actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural view of the present utility model;

[0021] Figure 2 is a schematic structural view of the first cavity of the present utility model;

[0022] Figure 3 is a schematic structural view of the second cavity of the present utility model;

[0023] Figure 4 is a schematic structural view of the tool head of the present utility model.

[0024] In the figure: 1. Tool head; 2. Tool shank; 3. First cavity; 4. Second cavity; 5. Through hole; 6. First threaded hole; 7. Plug; 8. Knob; 9. Piston plate; 10. Cooling hole; 11. Clamping edge; 12. First positioning hole; 13. Second positioning hole; 14. Second threaded hole; 15. Positioning screw; 16. Link; 17. Activity slot; 18. Compression spring; 19. Slot. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] Please refer to Figures 1-4 , the present utility model provides a technical solution:

[0027] A milling cutter with an overheat protection function, comprising:

[0028] A main body structure; the main body structure includes a tool head 1 and a tool shank 2, and the upper end of the tool head 1 is connected to the lower end of the tool shank 2;

[0029] It further includes a cooling mechanism disposed within the tool shank 2 for providing overheat protection to the tool bit 1; the cooling mechanism includes a first cavity 3 and a second cavity 4 formed within the tool shank 2. The first cavity 3 is used for storing coolant, and a piston plate 9 is slidably and sealingly installed within the second cavity 4. A plurality of groups of cooling holes 10 communicating with the second cavity 4 are circumferentially formed on the outer wall of the second cavity 4. A first threaded hole 6 for filling coolant is formed at the top of the first cavity 3, a plug 7 is installed within the threaded hole, and a through hole 5 communicating with the second cavity 4 is formed at the inner bottom of the first cavity 3. The plug 7 is installed inside the first threaded hole 6 by means of threaded connection, and a knob 8 is provided at the top of the plug 7.

[0030] Wherein, a connecting rod 16 is provided at the lower end of the piston plate 9, and a movable slot 17 is formed at the center of the upper end of the tool bit 1. The connecting rod 16 is slidably inserted into the interior of the movable slot 17, and a compression spring 18 is sleeved on the connecting rod 16 between the piston plate 9 and the upper end face of the tool bit 1.

[0031] During use, the plug 7 is removed through the knob 8, coolant is injected into the first cavity 3 through the first threaded hole 6. Under the action of the compression spring 18, the piston plate 9 seals the through hole 5, and the coolant cannot penetrate into the second cavity 4. After the injection is completed, the plug 7 is reinstalled, and then the tool shank 2 is installed on the corresponding processing equipment for processing operations;

[0032] When the tool bit 1 becomes overheated, since the tool shank 2 is connected to the tool bit 1, the tool shank 2 is also heated. The coolant within the first cavity 3 expands, pushes the piston plate 9 downward through the through hole 5 until the coolant enters the second cavity 4 and flows out through the cooling holes 10. The flowing coolant runs down along the tool bit 1 and covers the surface of the tool bit 1, thereby providing cooling protection to the tool bit 1, which can give the staff sufficient reaction time to timely check the processing status and stop the machine for adjustment;

[0033] Generally speaking, the structure of this device is simple and easy to use. Through the setting of the cooling mechanism, it can provide overheat protection to the tool bit 1, effectively preventing tool damage, decline in processing quality, and machine tool failures caused by overheating of the milling cutter, and ensuring production safety.

[0034] Furthermore, please refer to Figures 2-4 :

[0035] A clamping edge 11 is provided at the lower end of the tool shank 2, and a slot 19 is formed at the upper end of the tool bit 1. The clamping edge 11 is inserted into the interior of the slot 19 and fixed by a positioning screw 15. A first positioning hole 12 is formed on the clamping edge 11, a second positioning hole 13 corresponding to the first positioning hole 12 is formed on the outer wall of the slot 19, and a second threaded hole 14 corresponding to the positioning screw 15 is formed on the inner wall of the slot 19.

[0036] By providing a clamping edge 11 with a first positioning hole 12 at the lower end of the tool shank 2, and correspondingly providing a slot 19 with a second positioning hole 13 at the top of the tool bit 1, and a second threaded hole 14 for installing a positioning screw 15 on the inner wall of the slot 19, such a design, compared with an integrally formed milling cutter, enables the tool bit 1 and the tool shank 2 to be quickly and conveniently combined for use and disassembled and adjusted, facilitating the replacement of the type of the tool bit 1 according to actual needs; at the same time, it can reduce the processing difficulty and production cost of the device, and further improve the practicability of the device.

[0037] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A milling cutter with overheat protection function, characterized in that: include: Main structure; The main structure comprises a cutter head (1) and a cutter handle (2), wherein the upper end of the cutter head (1) and the lower end of the cutter handle (2) are connected together; It also includes a cooling mechanism disposed in the tool handle (2) and used to protect the tool head (1) from overheating; The cooling mechanism comprises a first cavity (3) and a second cavity (4) which are provided in the tool handle (2); the first cavity (3) is used for storing cooling liquid; a piston plate (9) is installed in the second cavity (4) in a sliding seal; a plurality of cooling holes (10) which are connected to the second cavity (4) are provided around the outer wall of the second cavity (4); a first threaded hole (6) for filling cooling liquid is provided at the top of the first cavity (3); a plug (7) is installed in the threaded hole; and a through hole (5) which is connected to the second cavity (4) is provided at the inner bottom of the first cavity (3).

2. A milling cutter with overheat protection function according to claim 1, characterized in that: The plug (7) is installed inside the first threaded hole (6) by means of a threaded connection, and a knob (8) is provided on the top of the plug (7).

3. The milling cutter with overheat protection function according to claim 1, characterized in that: A connecting rod (16) is provided at the lower end of the piston plate (9), and a movable groove (17) is provided at the center of the upper end of the cutter head (1).

4. A milling cutter with overheat protection function according to claim 3, characterized in that: The connecting rod (16) is slidably inserted into the movable groove (17), and a compression spring (18) is sleeved on the connecting rod (16) between the piston plate (9) and the upper end surface of the cutter head (1).

5. The milling cutter with overheat protection function according to claim 1, characterized in that: The lower end of the knife handle (2) is provided with a clamping edge (11), the upper end of the knife head (1) is provided with a slot (19), and the clamping edge (11) is inserted into the slot (19) and fixed by a positioning screw (15).

6. A milling cutter with overheat protection function according to claim 5, characterized in that: A first positioning hole (12) is provided on the clamping edge (11), a second positioning hole (13) corresponding to the first positioning hole (12) is provided on the outer wall of the slot (19), and a second threaded hole (14) corresponding to the positioning screw (15) is provided on the inner wall of the slot (19).

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