Taper milling cutter with gradually-changed helical angle

Abstract

The utility model discloses a taper milling cutter with a gradually-changed helical angle. The milling machine comprises a base, a bottom mounting assembly arranged in the base and a milling assembly arranged on the upper side surface of the bottom mounting assembly, and the bottom mounting assembly comprises a slot formed in the upper end surface of the base. The fixed bolt is twisted to be taken out from a first screw groove formed in the front and rear surfaces of the insertion rod and a second screw groove formed in the front and rear sides of the insertion groove in a meshed mode, the insertion rod at the lower end of the cutter body to be replaced is inserted into the insertion groove, the fixed bolt is installed in the aligned first screw groove and second screw groove in a meshed mode, and then the cutter body of the milling cutter can be independently replaced and fixed; and meanwhile, high-speed air flow generated by milled chippings is driven to be rapidly discharged outwards through the multiple sets of chipping discharging grooves, the situation that the chippings remain on the surface of the workpiece to cause blocking is avoided, and the practicability of the milling cutter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thread milling cutters, in particular to a tapered milling cutter with a gradually changing helical angle. Background Art

[0002] Milling cutters are one of the most common machining tools available today. With increasingly fierce market competition and a growing variety of products, the demands placed on milling cutters are also increasing. Unlike machining grooves and stepped surfaces, traditional end mills with standard blades are not suitable for specialized machining applications such as taper machining and mold drafting. However, milling cutters with tapered blades are a more suitable solution to this problem.

[0003] An existing patent (publication number CN216858364U) discloses an end mill with a gradually varying spiral taper angle. The taper structure of the milling cutter head makes it suitable for special processing applications such as conical surface processing and mold draft processing. Its end face first clearance angle, end face second clearance angle, and axial wedge angle structures enhance the sharpness of the bottom edge, reduce friction between the end face and the workpiece, and lower the milling force during the processing process.

[0004] However, there are some problems in the use of existing milling cutters: 1. The cutter head of the current milling cutter will inevitably wear out after long-term use, but the cutter head and the cutter rod are an integrated structure. If the cutter head needs to be replaced, the cutter rod must also be discarded, resulting in a waste of resources; 2. The chip groove of the existing milling cutter head is spiral, so the debris will spread to the surroundings, which is not convenient for subsequent cleaning. Utility Model Content

[0005] The purpose of the present utility model is to provide a tapered milling cutter with a gradually changing helix angle, so as to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising a base, a bottom mounting assembly arranged in the base, and a milling assembly arranged on the upper surface of the bottom mounting assembly;

[0007] The bottom mounting assembly includes a slot provided on the upper surface of the base, wherein a rod is detachably inserted into the slot, a first screw groove is provided on the front and rear side surfaces of the rod, and a second screw groove is provided on the front and rear side surfaces of the slot to cooperate with the first screw groove;

[0008] The milling assembly comprises a cutter body fixedly mounted on the surface of the insert rod, and a spiral blade is mounted on the upper end surface of the cutter body.

[0009] As a further solution of the present invention: the bottom mounting assembly further includes fixing bolts that are cooperatively installed inside the first screw groove and the second screw groove.

[0010] As a further solution of the present invention: the milling assembly also includes chip grooves evenly distributed on the surface of the cutter body.

[0011] As a further solution of the present invention: the shape and size of the insertion rod are the same as the shape and size of the slot, and both are cylindrical in shape.

[0012] As a further solution of the present invention: the front and rear side surfaces of the base are provided with planar clamping grooves for clamping the tool clamping seat.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] When the milling cutter needs to be replaced, the fixing bolt is twisted to engage and remove it from the first screw grooves opened on the front and rear surfaces of the insertion rod and the second screw grooves opened on the front and rear sides of the slot. The cutter body is pulled upward to drive the insertion rod fixedly connected at the lower end to be pulled out from the slot. The cutter body can be disassembled separately, and the insertion rod at the lower end of the replacement cutter body is inserted into the slot so that the first screw groove is aligned with the second screw groove. The fixing bolt is engaged and installed into the aligned first screw groove and second screw groove, and the separate replacement and fixation of the milling cutter body can be completed.

[0015] The utility model discloses that when using the milling cutter, the base is clamped by the clamping seat, which drives the rotation so that the spiral blade can more effectively and layeredly process the workpiece to be milled. At the same time, the high-speed air flow generated by the milling debris is driven to be quickly discharged outward through multiple sets of chip grooves, avoiding residue on the workpiece surface to cause obstruction, thereby improving the practicality of the milling cutter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of the bottom mounting assembly of an embodiment of the present utility model;

[0018] Figure 3 This is a bottom view schematic diagram of the bottom-mounted assembly of an embodiment of the utility model;

[0019] Figure 4 It is an overall bottom view schematic diagram of an embodiment of the utility model.

[0020] In the figure: 1, base; 201, slot; 202, insert rod; 203, first screw groove; 204, second screw groove; 205, fixing bolt; 301, cutter body; 302, chip groove; 303, spiral blade. DETAILED DESCRIPTION

[0021] To facilitate the solution of the problem, the present invention provides a tapered milling cutter with a gradually varying helix angle. The following, in conjunction with the accompanying drawings, provides a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments represent only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. Example 1

[0022] like Figures 1 to 4 As shown, this embodiment provides a tapered milling cutter with a gradual helix angle, including a base 1, a bottom-mounted component arranged in the base 1 and a milling cutting component arranged on the upper surface of the bottom-mounted component, the bottom-mounted component includes a slot 201 opened on the upper end surface of the base 1, the slot 201 is detachably inserted with an insertion rod 202, the front and rear side surfaces of the insertion rod 202 are provided with a first screw groove 203, the front and rear side surfaces of the slot 201 are provided with a second screw groove 204 that cooperates with the first screw groove 203, which is convenient for individual replacement of the milling cutter and saves costs, the milling cutting component includes a cutter body 301 fixedly mounted on the surface of the insertion rod 202, and the upper end surface of the cutter body 301 is cooperated with a spiral blade 303, which improves the milling effect and facilitates the unified collection of debris. Example 2

[0023] In addition to all the technical features of the first embodiment, this embodiment further includes: the bottom mounting assembly also includes a fixing bolt 205 that is cooperatively installed inside the first screw groove 203 and the second screw groove 204 to facilitate efficient disassembly, assembly and replacement.

[0024] Furthermore, the milling assembly further includes chip removal grooves 302 evenly distributed on the surface of the cutter body 301 to effectively remove chips in one direction.

[0025] Furthermore, the shape and size of the inserting rod 202 are the same as those of the slot 201 , and both are cylindrical in shape, which facilitates firm and stable replacement and installation.

[0026] Furthermore, the front and rear side surfaces of the base 1 are provided with planar clamping grooves for clamping the tool holder, so that the milling cutter is more stable during the process of being clamped and driven to rotate.

[0027] Working principle: When the milling cutter needs to be replaced, the fixing bolt 205 is twisted to engage and remove it from the first screw groove 203 opened on the front and rear surfaces of the insertion rod 202 and the second screw groove 204 opened on the front and rear sides of the slot 201, and the cutter body 301 is pulled upward to drive the insertion rod 202 fixed at the lower end to be pulled out from the slot 201, and the cutter body 301 can be disassembled separately, and the insertion rod 202 at the lower end of the replaced cutter body 301 is inserted into the slot 201, so that the first screw groove 203 is aligned with the second screw groove 204, and the fixing bolt 205 is engaged and installed into the aligned first screw groove 203 and second screw groove 204, and the separate replacement and fixation of the milling cutter body 301 is completed. During the use of the milling cutter, the base 1 is clamped by the clamping seat, and driven to rotate so that the spiral blade 303 can more effectively and layeredly process the workpiece to be milled. At the same time, the high-speed air flow generated by the milling debris is driven to be quickly discharged outward through the multiple sets of chip discharge grooves 302, avoiding the residue on the workpiece surface causing obstruction, thereby improving the practicality of the milling cutter.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0029] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A tapered milling cutter with a gradually varying helix angle, characterized in that: It comprises a base (1), a bottom mounting assembly arranged in the base (1), and a milling assembly arranged on the upper surface of the bottom mounting assembly; The bottom mounting assembly comprises a slot (201) provided on the upper surface of the base (1), a rod (202) being detachably inserted into the slot (201), a first screw groove (203) being provided on the front and rear side surfaces of the rod (202), and a second screw groove (204) cooperating with the first screw groove (203) being provided on the front and rear side surfaces of the slot (201); The milling assembly comprises a cutter body (301) fixedly mounted on the surface of the insert rod (202), and a spiral blade (303) is mounted on the upper end surface of the cutter body (301).

2. A tapered milling cutter with a gradually varying helix angle according to claim 1, characterized in that: The bottom mounting assembly further comprises a fixing bolt (205) mounted in cooperation with the first screw groove (203) and the second screw groove (204).

3. The tapered milling cutter with a gradually varying helix angle according to claim 1, characterized in that: The milling assembly further includes chip removal grooves (302) evenly distributed on the surface of the cutter body (301).

4. The tapered milling cutter with a gradually varying helix angle according to claim 1, characterized in that: The shape and size of the insertion rod (202) are the same as those of the slot (201), and both are cylindrical in shape.

5. The tapered milling cutter with a gradually varying helix angle according to claim 1, characterized in that: Plane clamping grooves for clamping the tool holder are provided on the front and rear side surfaces of the base (1).

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