CN209407530U - A Formed Wrong-tooth Milling Cutter - Google Patents

Abstract

The utility model discloses a shaped staggered-tooth milling cutter, which comprises a tool holder and a cutter bar. The end of the cutter bar is provided with a plurality of bottom edges, and the surface of the cutter bar corresponding to each bottom edge is provided with a helical milling edge. The two adjacent spiral milling edges are respectively the first milling edge and the second milling edge. The first milling edge includes a first outer circular edge portion and a first step portion, and a second outer circular edge portion and the bottom edge are provided with a second An arc-shaped connecting edge, the first outer circular cutting edge and the first step cooperate to form a machining avoidance portion, the second milling edge includes a second outer circular cutting edge and a second stepped cutting edge, the second outer circular cutting edge and the bottom edge A second arc-shaped connecting edge is arranged between them, a third arc-shaped connecting edge is arranged between the second outer circular edge portion and the second stepped edge portion, and the second outer circular edge portion is located on one side of the third arc-shaped connecting edge There are avoidance sections set up. The utility model can complete the processing of the opposite sides in one molding, has good shape and high quality, and improves production efficiency.

Description

A Formed Wrong Tooth Milling Cutter

technical field

The utility model relates to the field of forming cutters, in particular to a forming staggered tooth milling cutter.

Background technique

A milling cutter is a rotating tool with one or more teeth for milling. When working, each knife tooth cuts off the allowance of the workpiece intermittently in turn. Milling cutters are mainly used for machining planes, steps, grooves, forming surfaces and cutting off workpieces on milling machines.

Especially for the finished side plane, step and groove, the side milling finishing is an important step in product forming. The processed surface shape directly determines the processing quality. When the existing side milling cutter is processed, because only The side can be processed on one side, resulting in processing defects on the edge of the product, which cannot make a smooth transition;

The existing processing methods continue to use more precise tools to repair the defects, which greatly affects the processing efficiency and high cost.

Contents of the invention

The technical problem to be solved by the utility model is to provide a formed misaligned tooth milling cutter, which can complete the processing of the opposite side in one forming, has good shape, high quality, and improves production efficiency.

In order to solve the above-mentioned technical problems, the utility model provides a shaped staggered-tooth milling cutter, which includes a handle and a cutter bar. The end of the cutter bar is provided with a plurality of bottom edges, and the surface of the cutter bar corresponding to each bottom edge Helical milling edges are provided on each of the two adjacent helical milling edges, respectively the first milling edge and the second milling edge, the first milling edge includes a first outer circular edge portion and a first step portion, and the first A first arc-shaped connecting edge is provided between the outer circular cutting edge and the bottom cutting edge, the first outer circular cutting edge and the first step cooperate to form a processing avoidance portion, and the second milling edge includes a second outer circular cutting edge and a second stepped edge, a second arc connecting edge is provided between the second outer circular edge and the bottom edge, and a third arc is provided between the second outer circular edge and the second stepped edge shaped connecting edge, and the second outer circular edge portion is provided with an escape section on one side of the third arc-shaped connecting edge.

Further, the plurality of bottom edges are unequal grooves and at least two bottom edges are arranged across the center.

Further, the plurality of helical milling edges are unequally divided helix angles.

Further, when the diameter of the cutter bar at one end of the bottom edge is less than 10 mm, the radial depth of the avoidance section is 0.1 mm; when the diameter of the cutter bar at one end of the bottom edge is greater than 10 mm, the radial depth of the avoidance section is 0.2 mm .

Further, the number of the bottom edges is at least four.

Further, the avoiding section is provided with an extended edge, and the extended edge is connected with the third arc-shaped connecting edge.

Further, a through internal cooling channel is provided in the handle and the tool bar, and an internal cooling hole is provided between the internal cooling channel and each helical milling edge, and the internal cooling hole corresponding to the first milling edge faces the processing The avoidance part is provided, and the internal cooling hole corresponding to the second milling edge is arranged toward the second arc-shaped connecting edge.

The beneficial effects of the utility model:

In the side milling process, the first arc-shaped connecting edge, the second arc-shaped connecting edge and the third arc-shaped connecting edge are used to cooperate, so that the surface processing contour of the workpiece has a smooth transition; one-time forming is completed, reducing repeated processing and tool preparation The complexity and cost increase, and the processing efficiency is improved.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is the enlarged schematic view of the utility model blade;

Fig. 3 is a schematic projection of the blade structure of the utility model;

Fig. 4 is a structural schematic diagram of the first milling edge part of the present utility model;

Fig. 5 is a schematic structural view of the second milling edge part of the present invention;

Fig. 6 is a structural schematic diagram of the combination of the first milling edge and the second milling edge of the present invention;

Fig. 7 is a schematic diagram of the internal cooling structure of the utility model.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the utility model and implement it, but the examples given are not intended to limit the utility model.

Referring to Fig. 1 to Fig. 6, an embodiment of the shaped staggered tooth milling cutter of the present utility model includes a handle 1 and a cutter bar 2, and a plurality of bottom edges 3 are arranged on the end of the cutter bar, and each bottom edge A helical milling edge 4 is provided on the surface of the corresponding cutter bar, and two adjacent helical milling edges are respectively a first milling edge 5 and a second milling edge 6, and the first milling edge includes a first outer circular edge portion 7 and a first The step portion 8, the first arc-shaped connecting edge 9 is arranged between the first outer circular cutting edge and the bottom edge, the first outer circular cutting edge and the first step cooperate to form a processing avoidance portion 10, and the second milling edge includes the second The outer circular edge portion 11 and the second stepped edge portion 12, a second arc-shaped connecting edge 13 is arranged between the second outer circular edge portion and the bottom edge, and a second arc-shaped connecting edge 13 is arranged between the second outer circular edge portion and the second stepped edge portion. The third arc-shaped engaging edge 14 is provided with an escape section 15 on the second outer circular edge portion on one side of the third arc-shaped engaging edge.

Multiple bottom edges can be used to process the bottom surface of the workpiece; the first outer circular edge is used to process the side of the workpiece, and the first arc-shaped connecting edge is used to process the contour of the junction between the bottom surface of the workpiece and the side edge, Referring to Figure 4, the bottom edge, the first arc-shaped connecting edge and the first outer circular edge cooperate to form the first cutting edge track 51; the second outer circular edge is used to process the side of the workpiece, and the second arc-shaped connecting edge It is used to process the contour of the joint between the bottom surface and the side of the workpiece, the third arc-shaped connecting edge is used to process the contour of the joint between the top surface and the side of the workpiece, and the second stepped edge is used to process the top surface of the workpiece Auxiliary processing, as shown in Figure 5, the bottom edge, the second arc-shaped connecting edge, the second outer circular edge, the third arc-shaped connecting edge and the second stepped edge cooperate to form a second cutting edge track 61; Shown, is the contour shape after the compounding of the first cutting edge trajectory and the second cutting edge trajectory, wherein the axial length of the first cutting edge trajectory is L1, and the axial length of the second cutting edge trajectory is L2, where L2 is less than L1, so that the machining The avoidance part effectively plays the role of avoidance, while the third arc-shaped connecting edge and the second stepped edge can play a processing role, and the axial length of the second arc-shaped connecting edge and the second outer circular edge is L3, which is the same as the first Cutting edge paths overlap. After processing, the contour finish can be effectively improved, so that the contour can transition smoothly.

The above-mentioned multiple bottom edges are unequal grooves and at least two bottom edges are arranged through the center, and only two bottom edges are designed to have proper chip removal and cutting functions, and the cutting balance is relatively good.

The above-mentioned multiple helical milling edges have unequal helix angles, and the multiple bottom edges are set with unequal grooves, which prevents tool vibration during machining and facilitates effective chip breaking during machining.

The number of bottom edges is at least 4, which achieves the effect of staggered distribution, so that the edge of the processed tool will not have defects, and the service life is improved. The avoidance section is provided with an extended edge 16, the extended edge is connected with the third arc-shaped connecting edge, and the extended edge and the third arc-shaped connecting edge cooperate to process the transition corner, improve the processing smoothness, and the milling effect is good, further ensuring that the tool The machined contours are smooth transitions. When the diameter of the tool bar at the end of the bottom edge is less than 10mm, the radial depth T of the avoidance section is 0.1mm; when the diameter of the tool bar at the end of the bottom edge is greater than 10mm, the radial depth T of the avoidance section is 0.2mm, effectively ensuring the machining precision.

As shown in Fig. 7, it is prepared by internal cooling structure. A through internal cooling channel 17 is arranged in the tool holder and the cutter bar. An internal cooling hole 18 is provided between the internal cooling channel and each helical milling edge. The first milling edge The corresponding inner cooling hole is arranged towards the processing avoidance part, and the inner cooling hole corresponding to the second milling edge is arranged towards the second arc-shaped connecting edge. This method can have a comprehensive cooling effect on the entire tool during use, and there is no cooling omission area. Effective cooling can prolong the service life of the tool and improve stable machining accuracy.

The above embodiments are only preferred embodiments for fully illustrating the utility model, and the protection scope of the utility model is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present utility model are all within the protection scope of the present utility model. The scope of protection of the utility model shall be determined by the claims.

Claims (7)

1. a kind of molding staggered tooth milling cutter, which is characterized in that including knife handle and knife bar, multiple bottoms are provided on the end of the knife bar Sword, is provided with helical milling sword in the corresponding arbor surface of each shear blade, two neighboring helical milling sword be respectively the first milling sword and Second milling sword, the first milling sword includes the first outer circle blade and first step portion, between the first outer circle blade and shear blade It is provided with the first arc linking sword, the first outer circle blade and first step portion cooperatively form processing relief portion, and described second Milling sword includes the second outer circle blade and the second ladder blade, and the second arc rank is provided between the second outer circle blade and shear blade Sword is connect, third arc linking sword, the second outer circle blade are provided between the second outer circle blade and the second ladder blade The upper third arc linking sword side that is located at is provided with evacuation section.

2. molding staggered tooth milling cutter as described in claim 1, which is characterized in that multiple shear blades are not equal part fluting and at least two A shear blade crosses center setting.

3. molding staggered tooth milling cutter as claimed in claim 2, which is characterized in that multiple helical milling swords are not equal part helical angle.

4. molding staggered tooth milling cutter as described in claim 1, which is characterized in that the diameter that knife bar is located at shear blade one end is less than 10mm When, the radial depth of the evacuation section is 0.1mm；When the diameter that knife bar is located at shear blade one end is greater than 10mm, the evacuation section Radial depth is 0.2mm.

5. molding staggered tooth milling cutter as described in claim 1, which is characterized in that the quantity of the shear blade is at least 4.

6. molding staggered tooth milling cutter as described in claim 1, which is characterized in that it is provided with extension sword in the evacuation section, it is described Extend sword to connect with third arc linking sword.

7. molding staggered tooth milling cutter as described in claim 1, which is characterized in that be provided with the interior of perforation in the knife handle and knife bar Cold passage is provided with interior cold hole, the corresponding interior cold Kong Chaoxiang of the first milling sword between the inner cooling path and each helical milling sword Relief portion setting is processed, the corresponding interior cold hole of the second milling sword is connected sword setting towards the second arc.