Cutter for machining inclined plane hole

Abstract

The utility model relates to the technical field of die machining, in particular to a cutter for machining an inclined plane hole. The cutter comprises a key groove cutter used for treading holes in the surface of a fixed mold and positioning the fixed mold; the first cutting section is connected with the keyway cutter, and the first cutting section is provided with a plurality of first cutting edges used for machining guide holes; the second cutting section is connected with the end, deviating from the key groove cutter, of the first cutting section, and the second cutting section is provided with a plurality of second cutting edges used for machining counterbores; the cutter handle is connected with one end, deviating from the first cutting section, of the second cutting section; the diameter of the first cutting section is larger than that of the key groove cutter and smaller than that of the second cutting section. By means of the arrangement, when the composite drilling and milling cutter is used for machining inclined plane holes, the key groove cutter is used for treading holes in the surface of the fixed die and positioning, and the technical problem that in the prior art, when the composite drilling and milling cutter is used for machining the inclined plane holes, deviation or workpiece deformation is prone to occurring, and the hole precision is low is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mould processing technical field especially a cutter for processing bevel hole. BACKGROUND

[0002] When processing hole on workpiece, it is usually needed to use drill bit and milling cutter to cut the excess of workpiece in turn intermittently, and the cutter on the existing numerical control lathe can only be fixed, and it is needed to use drill bit and milling cutter respectively when processing hole, so the cutter needs to be switched from time to time, which is time-consuming and laborious, reduces production efficiency, and the concentricity of processed hole and groove is poor, and defective products are prone to occur.

[0003] For this, the patent document with the authorized announcement number CN206732226U discloses a composite drill and milling cutter, the drill and milling cutter includes a shank, one end of the shank is connected with a tool bit, the shank and the tool bit have a common central axis, the tool bit includes a first cutting part and a second cutting part, the second cutting part is arranged adjacent to the first cutting part in the direction of the central axis, the first cutting part includes a plurality of first cutting edges, the first cutting edge includes a first main cutting surface and a first auxiliary cutting surface connected with the first main cutting surface, the first main cutting surface and the first auxiliary cutting surface are arranged adjacent to each other and form a certain angle, the second cutting part includes a plurality of second cutting edges, the second cutting edge is connected with the first cutting edge, and a chip guide groove is further arranged at the connection between the second cutting edge and the first cutting edge; when in use, the first cutting part plays the group drill role, and the second cutting edge of the second cutting part acts as a milling cutter edge to ensure the continuity of the cutting process and save the time for replacing multiple cutters.

[0004] It can be seen that the above-mentioned composite drill and milling cutter can realize drilling and milling after one clamping, and the time for replacing cutters is saved, but for bevel hole such as inclined guide pillar hole, the processing surface is inclined, and the above-mentioned composite drill and milling cutter will be subjected to uneven cutting force in the processing process, which causes the cutter to deviate or the workpiece to deform, and affects the accuracy of the hole. SUMMARY

[0005] The utility model provides a cutter for processing bevel hole to solve the technical problem of low hole accuracy caused by the deviation of the composite drill and milling cutter or the deformation of the workpiece when the composite drill and milling cutter processes bevel hole in the prior art.

[0006] To solve the above-mentioned problems, the cutter for processing bevel hole provided by the utility model adopts the following technical scheme:

[0007] A cutter for processing bevel hole, comprising:

[0008] A keyway cutter is used for tapping hole and positioning on the surface of a fixed mold;

[0009] a first cutting section connected to the keyway cutter, the first cutting section having a plurality of first cutting edges for machining a pilot hole;

[0010] a second cutting section connected to an end of the first cutting section away from the keyway cutter, the second cutting section having a plurality of second cutting edges for machining a counterbore hole;

[0011] a shank connected to an end of the second cutting section away from the first cutting section;

[0012] a diameter of the first cutting section is greater than a diameter of the keyway cutter and less than a diameter of the second cutting section.

[0013] The tool for machining a bevel hole has the following advantages:

[0014] 1. The keyway cutter is arranged at an end of the tool for machining a bevel hole, the keyway cutter is used to punch a hole on a surface of a fixed mold and to position the hole, and thus an accurate positioning reference is provided for subsequent machining of the bevel hole, so that repeated adjustment and correction during machining of the bevel hole are avoided, machining errors are reduced, overall machining precision is improved, and machining efficiency of the bevel hole is greatly improved.

[0015] 2. The first cutting section is arranged, a diameter of the first cutting section is greater than a diameter of the keyway cutter and less than a diameter of the second cutting section, and the first cutting section is used to machine a pilot hole on the fixed mold, so that the pilot hole can guide subsequent machining of the bevel hole.

[0016] Through the above arrangement, the utility model completes the improvement and upgrading of the existing composite drill-mill cutter, and effectively solves the technical problem that the existing composite drill-mill cutter is prone to deviation or causes deformation of a workpiece during machining of a bevel hole, and thus low hole precision is caused.

[0017] Further, the keyway cutter, the first cutting section, the second cutting section and the shank are integrally formed.

[0018] Further, a length of the second cutting section is greater than a length of the first cutting section.

[0019] Further, a length of the keyway cutter is 3 mm.

[0020] Further, a diameter of the keyway cutter is 6 mm.

[0021] Further, the first cutting edges and the second cutting edges have the same inclination angle.

[0022] Further, the first cutting edges and the second cutting edges have the same inclination angle as an included angle between a surface of the fixed mold and a machine tool worktable. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description read in conjunction with the accompanying drawings, in which several embodiments of the present application are shown. In the drawings, the same or corresponding parts are denoted by the same or corresponding reference numerals, and:

[0024] Figure 1 A structural schematic view of the tool for machining a bevel hole provided by the present application;

[0025] Figure 2 An application structural schematic view of the tool for machining a bevel hole provided by the present application.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 1, keyway cutter; 2, fixed mold; 3, first cutting section; 4, second cutting section; 5, tool shank; 6, machine tool worktable; 7, fixed mold fixing clamp. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. It should be known by those skilled in the art that the embodiments described below are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] It should be noted that the main concept of the tool for machining a bevel hole provided by the present application is that: by setting the tool including the keyway cutter 1, the first cutting section 3 and the second cutting section 4, the keyway cutter 1 is used to punch a hole on the surface of the fixed mold 2 and to position, which can provide an accurate positioning reference for machining the bevel hole, reduce the possibility of tool deviation, and the cutting force is small, the damage to the fixed mold 2 is small, and the possibility of deformation of the fixed mold 2 is greatly reduced; the first cutting section 3 is used to machine a guide hole on the fixed mold 2, which can provide guidance for subsequent machining of the bevel hole, thereby improving the precision of the bevel hole.

[0030] After introducing the basic principle of the present application, various non-limiting embodiments of the present application will be specifically introduced below. Any element quantity in the drawings is used for example, not for limitation, and any naming is only used for distinction, not having any limiting meaning.

[0031] When demolding injection molded products, a slider is needed for core pulling. The slider operation generally requires structural components such as inclined guide pillars, hydraulic cylinders, and springs. Currently, when machining inclined guide pillar holes on the fixed mold, either a small milling cutter is used to mill countersunk holes on the fixed mold, which is time-consuming, or a milling cutter is used to directly press down to machine the countersunk holes, which can easily cause the milling cutter's cutting edge to break. After the countersunk holes are machined, a centering drill is used to drill the center hole, and a drill bit is used to drill the pilot hole (the pilot hole is 0.1 to 0.2 mm smaller than the standard hole). Finally, a reamer is used to ream the hole.

[0032] During the drilling process, since the machining surface is not perpendicular to the tool, a flat surface needs to be milled first to ensure the positional accuracy of the tool during drilling. The machining process involves many steps and takes a long time. If it is not possible to drill positioning holes on the inclined surface, the drill bit is prone to drilling into empty spaces, and the drilling position and accuracy cannot be guaranteed.

[0033] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0034] Embodiment 1 of the cutting tool for machining beveled holes provided by this utility model:

[0035] like Figure 1 and Figure 2 As shown, the tool used for machining inclined holes is a one-piece structure, which includes a keyway cutter 1, a first cutting section 3, a second cutting section 4, and a tool holder 5 connected in sequence.

[0036] The lower end of the keyway cutter 1 is used to drill holes and position itself on the surface of the fixed mold 2. Its upper end is connected to the lower end of the first cutting section 3. The upper end of the first cutting section 3 is connected to the lower end of the second cutting section 4. The upper end of the second cutting section 4 is connected to the lower end of the tool holder 5. The upper end of the tool holder 5 is used to mount the tool on a CNC machine tool. The first cutting section 3 has multiple first cutting edges for machining guide holes, and the second cutting section 4 has multiple second cutting edges for machining countersunk holes.

[0037] Specifically, the diameter of the first cutting section 3 is greater than the diameter of the keyway cutter 1 and less than the diameter of the second cutting section 4, and the length of the second cutting section 4 is greater than the length of the first cutting section 3.

[0038] Specifically, the keyway cutter 1 has a length of 3mm and a diameter of 6mm; the first cutting section 3 has a length of 20±0.1mm and a diameter of 14mm; the second cutting section 4 has a length of 50±0.5mm and a diameter of 20mm; and the tool holder 5 has a diameter of 16mm and a length of 50mm.

[0039] Specifically, the first cutting edge and the second cutting edge have the same tilt angle, and the tilt angle of the first cutting edge and the second cutting edge is the same as the angle between the fixed mold surface 2 and the machine tool worktable 6.

[0040] It should be noted that the fixed mold fixing clamp 7 is installed on the machine tool workbench 6 to clamp the fixed mold 2.

[0041] The working principle of the cutter for machining the inclined surface hole provided by the utility model is that: first, the keyway cutter 1 is used to punch a hole on the surface of the fixed mold 2 and to position, when the keyway cutter 1 is machined to 3mm deep, the first cutting section 3 starts to machine the guide hole to provide guidance for subsequent machining of the inclined guide pillar hole, finally, when the first cutting section 3 is machined to 50mm, the second cutting section 4 is used to machine the counter-sunk hole, so that the counter-sunk hole, the guide hole and the centering hole can be machined at one time.

[0042] Embodiment 2 of the cutter for machining the inclined surface hole provided by the utility model:

[0043] The difference between the embodiment 1 and the embodiment 2 is mainly that:

[0044] In the embodiment 1, the length of the keyway cutter is 3mm, and the diameter is 6mm; the length of the first cutting section is 20±0.1mm, and the diameter is 14mm; the length of the second cutting section is 50±0.5mm, and the diameter is 20mm; the diameter of the shank is 16mm, and the length is 50mm.

[0045] In the embodiment, the length and the diameter of the keyway cutter, the first cutting section, the second cutting section and the shank are determined according to the specific use conditions.

[0046] According to the above description of the present specification, those skilled in the art can also understand that the terms used, such as "upper", "lower", "front", "rear", "left", "right", "width", "horizontal", "top", "bottom", "inner", "outer" and the like indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings of the present specification, and are only for the purpose of facilitating the description of the scheme of the utility model and simplifying the description, and do not explicitly or implicitly indicate or suggest that the devices or elements involved must have the said specific orientation, be constructed and operated in the said specific orientation, therefore the above orientation or positional relationship terms cannot be understood or interpreted as a limitation on the scheme of the utility model.

[0047] In addition, in the description of the present specification, the meaning of "a plurality of" is at least two, such as two, three or more, etc., unless otherwise specifically limited.

Claims

1. A tool for machining a bevel hole, characterized in that, Comprising: a keyway cutter for tapping and positioning on a die surface; a first cutting section connected to the keyway cutter, the first cutting section having a plurality of first cutting edges for machining pilot holes; a second cutting section connected to an end of the first cutting section away from the keyway cutter, the second cutting section having a plurality of second cutting edges for machining counterbore holes; a shank connected to an end of the second cutting section away from the first cutting section; the first cutting section has a diameter larger than that of the keyway cutter and smaller than that of the second cutting section.

2. The tool for machining a bevel hole according to claim 1, characterized in that, the keyway cutter, the first cutting section, the second cutting section and the shank are integrally formed.

3. The tool for machining a bevel hole according to claim 2, characterized in that, the second cutting section has a length greater than that of the first cutting section.

4. A tool for machining a bevel hole according to any one of claims 1 to 3, characterized in that, the keyway cutter has a length of 3mm.

5. The tool for machining a bevel hole according to claim 4, characterized in that, the keyway cutter has a diameter of 6mm.

6. The tool for machining a bevel hole according to any one of claims 1 to 3, characterized in that, the first cutting edges and the second cutting edges have the same inclination angle.

7. A tool for machining a bevel hole according to claim 6, characterized in that the first cutting edges and the second cutting edges have the same inclination angle with the angle between the die surface and the machine tool table.

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