Long-edge multi-tooth milling cutter

Abstract

The utility model discloses a long-blade multi-tooth milling cutter, which comprises a central screw internal-pulling type cutter handle and a main milling cutter fixedly arranged at one end of the central screw internal-pulling type cutter handle, a plurality of spiral grooves are formed in the outer wall of the main milling cutter in a circular array mode, and a plurality of main milling teeth are fixedly arranged on the inner wall of one side of each spiral groove in the spiral direction of the spiral groove. The multiple main milling teeth are arranged at equal intervals and are overlapped in the rotating direction of the main milling cutter. According to the long-blade multi-tooth milling cutter, the spiral grooves are formed in the outer wall of the main milling cutter in the circular array mode, the main milling teeth are arranged at equal intervals in the spiral direction of the spiral grooves, so that the blades of side milling of the main milling teeth are spliced and lengthened through cooperation of the main milling teeth, meanwhile, the main milling teeth are overlapped in the rotating direction of the main milling cutter, and the milling efficiency is improved. Therefore, the continuity of the side milling blades of the main milling teeth is guaranteed, and multiple times of side milling operation can be reduced under the action of the spliced and lengthened side milling blades.

Description

Technical Field

[0001] The utility model relates to the technical field of milling cutters, in particular to a long-edge multi-tooth milling cutter. Background Art

[0002] The main function of the milling cutter is to perform cutting, grooving, drilling, and plane processing on the workpiece through a rotating cutting edge. According to the cutting method and tool shape, it is divided into different types such as end mills, face milling cutters, serrated cutters, ball head milling cutters, etc. to meet different processing needs.

[0003] In the current processing technology of cylinder crankshaft hole seat, the processing solution of welding alloy blade milling cutter is generally adopted. Since the processing allowance of some cylinder crankshaft hole seats is large, the existing welding alloy blade milling cutter can only perform layered multiple side milling processing due to the small number of teeth, short side blade and blunt cutting edge.

[0004] Multiple side milling processes not only take too long, but also seriously affect the processing efficiency. At the same time, due to the high requirements for the verticality and roughness of the crankshaft hole seat, the layered multiple side milling processes will leave tool marks of varying degrees, which will lead to differences in the verticality, roughness and drawing requirements of the crankshaft hole seat. Utility Model Content

[0005] The utility model aims to provide a long-edge multi-tooth milling cutter, which forms a long side edge by cooperation between multiple teeth, thereby reducing multiple side milling operations when machining a crankshaft hole seat, so as to improve machining efficiency and machining accuracy.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a long-blade multi-tooth milling cutter, comprising a center screw inner pull-type shank and a main milling cutter fixedly installed at one end thereof, the outer wall of the main milling cutter is provided with a plurality of spiral grooves in a circular array, the inner wall of one side of the spiral groove is provided with a plurality of main milling teeth fixedly installed along the spiral direction of the spiral groove, and the plurality of main milling teeth are arranged at equal intervals, and the plurality of main milling teeth overlap along the rotation direction of the main milling cutter.

[0007] Preferably, a plurality of fixed through holes are opened in the main milling cutter, and a plurality of the main milling teeth are respectively inserted and arranged at the first end of the fixed through holes, a main bolt is movably arranged in the through hole portion opened on the main milling tooth, and the main bolt thread is rotatably arranged on the thread groove opened in the fixed through hole.

[0008] Preferably, an outer wall on one side of the main milling tooth is provided with a chamfered portion, and the chamfered portions face inside the spiral groove respectively.

[0009] Preferably, the inner wall of the perforated portion is movably provided with a plurality of extrusion blocks, the outer wall on one side of the main milling tooth is slidably provided with a plurality of push blocks matching the extrusion blocks, the first end of the push block is movably provided on the main milling cutter, and the curved surface portions provided on the first end of the push block and the extrusion block are tangently matched.

[0010] Preferably, an anti-slip pad is fixedly mounted on the second end of the extrusion block.

[0011] Preferably, a first spring is fixedly mounted on the pushing block, and a second spring is fixedly mounted on the extruding block.

[0012] Preferably, the anti-slip pad is a high temperature resistant rubber pad.

[0013] In the above technical scheme, a long-blade multi-tooth milling cutter provided by the utility model has the following beneficial effects: a plurality of spiral grooves are opened in a circular array on the outer wall of the main milling cutter, and the main milling teeth are arranged at equal intervals along the spiral direction of the spiral grooves, so that the blade splicing of the side milling of the main milling teeth is made longer through the cooperation between the plurality of main milling teeth, and at the same time, the plurality of main milling teeth overlap along the rotation direction of the main milling cutter, thereby ensuring the continuity of the side milling blades of the plurality of main milling teeth, and then under the action of the spliced ​​and lengthened side milling blades, the operation of multiple side milling can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0015] Figure 1 A schematic diagram of the overall structure of the main milling cutter provided in an embodiment of the utility model;

[0016] Figure 2 A schematic diagram of the cross-sectional structure of the main milling cutter provided in an embodiment of the utility model;

[0017] Figure 3 for Figure 2 Enlarged structural diagram at A in the middle.

[0018] Description of reference numerals:

[0019] 1. Center screw inner pull-type tool holder; 2. Main milling teeth; 3. Main bolt; 4. Extrusion block; 5. Push block; 11. Main milling cutter; 12. Spiral groove; 13. Fixed through hole; 14. Threaded groove; 21. Inclined portion; 22. Through hole portion; 41. Anti-slip pad; 42. Second spring; 43. Curved portion; 51. First spring. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] like Figure 1-3 As shown, a long-blade multi-tooth milling cutter includes a center screw inner pull-type shank 1 and a main milling cutter 11 fixedly installed at one end thereof, a plurality of spiral grooves 12 are opened in a circular array on the outer wall of the main milling cutter 11, a plurality of main milling teeth 2 are fixedly installed along the spiral direction of the spiral groove 12 on the inner wall on one side of the spiral groove 12, and the plurality of main milling teeth 2 are arranged at equal intervals, and the plurality of main milling teeth 2 overlap along the rotation direction of the main milling cutter 11.

[0022] A plurality of spiral grooves 12 are opened in a circular array on the outer wall of the main milling cutter 11, and the main milling teeth 2 are arranged at equal intervals along the spiral direction of the spiral grooves 12, so that the side milling blades of the main milling teeth 2 are spliced ​​and lengthened through the cooperation between the plurality of main milling teeth 2. At the same time, the plurality of main milling teeth 2 overlap along the rotation direction of the main milling cutter 11, thereby ensuring the continuity of the side milling blades of the plurality of main milling teeth 2, and further, under the effect of the spliced ​​and lengthened side milling blades, the operation of multiple side milling can be reduced.

[0023] Specifically, the main milling teeth 2 in the above technical solution overlap along the rotation direction of the main milling cutter 11, which is specifically Figure 1 In the process, one of the main milling teeth 2 is located on the side of another main milling tooth 2, and in the process of side milling of the other main milling tooth 2, the side milling stroke of part of the side edge of one main milling tooth 2 will overlap with the side milling stroke of the side edge of the other main milling tooth 2, so that the side milling between the main milling teeth 2 can be connected during the side milling of multiple main milling teeth 2, thereby improving the processing accuracy. At the same time, the center screw inner pull type tool holder 1 has good rigidity, stable processing and no tool vibration.

[0024] As a technical solution further provided by the utility model, a plurality of fixed through holes 13 are opened in the main milling cutter 11, and a plurality of main milling teeth 2 are respectively inserted and arranged at the first end of the fixed through holes 13. A main bolt 3 is movably arranged in the through hole portion 22 opened on the main milling tooth 2, and the main bolt 3 is threadably rotatably arranged on the thread groove 14 opened in the fixed through hole 13.

[0025] Specifically, Figure 2 As shown, the main milling tooth 2 is fixedly installed on the main milling cutter 11 by inserting the main milling tooth 2 into the first end of the fixed through hole 13, and then the main bolt 3 passes through the through hole 22 and is threadedly rotated on the thread groove 14, and the main milling tooth 2 is disassembled and assembled to facilitate the subsequent replacement of the worn main milling tooth 2.

[0026] Furthermore, an outer wall on one side of the main milling tooth 2 is provided with an inclined surface 21 , and the inclined surface 21 faces the inside of the spiral groove 12 .

[0027] Specifically, when the side edge of the main milling tooth 2 is side milled, the metal chips milled off move along the inclined portion 21 into the spiral groove 12, and along with the rotation of the main milling cutter 11, the metal chips move up along the spiral groove 12, and finally are thrown out of the spiral groove 12 through the end of the spiral groove 12, thereby reducing the accumulation of metal chips in the spiral groove 12 and affecting the side milling of the main milling cutter 11.

[0028] Furthermore, the inner wall of the perforated portion 22 is movably provided with a plurality of extrusion blocks 4, the outer wall on one side of the main milling tooth 2 is slidably provided with a plurality of push blocks 5 matching the extrusion blocks 4, the first end of the push block 5 is movably provided on the main milling cutter 11, and the curved surface portion 43 provided on the first end of the push block 5 and the extrusion block 4 is tangent to each other.

[0029] Specifically, since the main milling teeth 2 will generate certain vibrations when performing side milling, in order to improve the stability of the main milling teeth 2 when in use, after a plurality of main milling teeth 2 are respectively inserted and arranged at the first end of the fixed through-hole 13, the main bolt 3 is then passed through the through-hole portion 22 and threadedly rotated on the thread groove 14. At this time, the main milling teeth 2 are gradually attached to the main milling cutter 11, as shown in FIG. Figure 3 As shown, the main milling tooth 2 gradually fits against the main milling cutter 11 so that the pushing block 5 slides inside the main milling tooth 2 and is tangent to the curved surface portion 43 set at the first end of the extrusion block 4, so that the pushing extrusion block 4 slides close to the main bolt 3. By making multiple extrusion blocks 4 push on the main bolt 3 respectively, the vibration generated by the main milling tooth 2 is reduced, and displacement looseness is generated between the main bolt 3 and the thread groove 14.

[0030] Furthermore, an anti-skid pad 41 is fixedly mounted on the second end of the extrusion block 4 .

[0031] Specifically, the anti-skid pad 41 is used to further improve the stability of the main bolt 3 when the extrusion block 4 is pushed on the main bolt 3, thereby reducing the deflection and loosening of the main bolt 3 caused by the vibration of the main milling tooth 2.

[0032] Furthermore, a first spring 51 is fixedly mounted on the push block 5 , and a second spring 42 is fixedly mounted on the squeeze block 4 .

[0033] Specifically, the first ends of the first spring 51 and the second spring 42 are respectively fixedly mounted on the main milling tooth 2. In order to prevent the main bolt 3 from being blocked by the extrusion block 4 when the main bolt 3 is inserted into the perforated portion 22, the first spring 51 is used to pull the push block 5 away from the extrusion block 4, and the second spring 42 is used to pull the extrusion block 4 away from the main bolt 3, so that the main bolt 3 can be inserted into the perforated portion 22.

[0034] Furthermore, the anti-skid pad 41 is a high temperature resistant rubber pad.

[0035] Specifically, due to the high temperature generated by the friction of the main milling teeth 2 during side milling, a high temperature resistant rubber pad is used to ensure the anti-slip effect on the main bolt 3 while being able to adapt to the high temperature environment.

[0036] Working principle: multiple spiral grooves 12 are opened in a circular array on the outer wall of the main milling cutter 11, and the main milling teeth 2 are arranged at equal intervals along the spiral direction of the spiral grooves 12, so that the main milling teeth 2 can cooperate with each other to make the side milling blades of the main milling teeth 2 longer. At the same time, multiple main milling teeth 2 overlap along the rotation direction of the main milling cutter 11, thereby ensuring the continuity of the side milling blades of multiple main milling teeth 2. Under the effect of the spliced ​​and lengthened side milling blades, multiple side milling operations can be reduced. At the same time, after the multiple main milling teeth 2 are respectively inserted and set at the first end of the fixed through hole 13, and then the main bolt 3 is passed through the through hole 22 and threadedly rotated on the thread groove 14, the main milling teeth 2 gradually fit on the main milling cutter 11, as shown in FIG. Figure 3 As shown, the main milling tooth 2 gradually fits against the main milling cutter 11 so that the pushing block 5 slides inside the main milling tooth 2 and is tangent to the curved surface portion 43 set at the first end of the extrusion block 4, so that the pushing extrusion block 4 slides close to the main bolt 3. By making multiple extrusion blocks 4 push on the main bolt 3 respectively, the vibration generated by the main milling tooth 2 is reduced, and displacement looseness is generated between the main bolt 3 and the thread groove 14.

[0037] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A long-edge multi-tooth milling cutter, characterized in that: The invention comprises a central screw inner pull-type tool handle (1) and a main milling cutter (11) fixedly mounted at one end thereof, wherein a plurality of spiral grooves (12) are provided in a circular array on the outer wall of the main milling cutter (11), a plurality of main milling teeth (2) are fixedly mounted on the inner wall of one side of the spiral groove (12) along the spiral direction of the spiral groove (12), and the plurality of main milling teeth (2) are arranged at equal intervals, and the plurality of main milling teeth (2) overlap along the rotation direction of the main milling cutter (11).

2. A long-edge multi-tooth milling cutter according to claim 1, characterized in that: The main milling cutter (11) is provided with a plurality of fixed through holes (13), and the plurality of main milling teeth (2) are respectively inserted and arranged at the first ends of the fixed through holes (13). A main bolt (3) is movably arranged in the through hole portion (22) provided on the main milling tooth (2), and the main bolt (3) is threadably rotatably arranged on a thread groove (14) provided in the fixed through hole (13).

3. A long-edge multi-tooth milling cutter according to claim 1, characterized in that: An outer wall on one side of the main milling tooth (2) is provided with an inclined surface (21), and the inclined surfaces (21) face the inside of the spiral groove (12).

4. A long-edge multi-tooth milling cutter according to claim 2, characterized in that: The inner wall of the perforated portion (22) is movably provided with a plurality of extrusion blocks (4), and the outer wall of one side of the main milling tooth (2) is slidably provided with a plurality of push blocks (5) matching the extrusion blocks (4), the first end of the push block (5) is movably provided on the main milling cutter (11), and the curved surface portions (43) provided on the first ends of the push block (5) and the extrusion block (4) are tangentially matched.

5. A long-edge multi-tooth milling cutter according to claim 4, characterized in that: An anti-slip pad (41) is fixedly mounted on the second end of the extrusion block (4).

6. A long-edge multi-tooth milling cutter according to claim 4, characterized in that: A first spring (51) is fixedly mounted on the pushing block (5), and a second spring (42) is fixedly mounted on the squeezing block (4).

7. The long-edge multi-tooth milling cutter according to claim 5, characterized in that: The anti-slip pad (41) is a high temperature resistant rubber pad.

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