Adjustable cylindrical profiling tool for machining center

Abstract

The utility model discloses a kind of adjustable cylindrical profiling cutters for numerical control machining center processing, belong to milling cutter field for machining, including the transverse tool bar being installed on tool holder, vertical tool bar being vertically arranged on the transverse tool bar, first insert for cutting the outer circle of shaft parts being arranged in the front end of the vertical tool bar, second insert for chamfering tail end of shaft parts being arranged in the rear end of the vertical tool bar;The vertical tool bar and the transverse tool bar junction are provided with arc transition surface;The relief β of the first insert and the second insert is 7 °, and the nose circle arc is 0.8.The utility model is a profiling milling cutter with replaceable blade, a chamfering cutter is designed in the tail end of cutter, after outer circle is machined by feeding cutter, chamfering can be carried out without changing tool, and blade selection is ordinary turning tool blade, with the advantages of low processing cost, high processing efficiency etc.

Description

Technical Field

[0001] This utility model relates to the field of milling cutters for machining, and in particular to an adjustable outer diameter profile cutting tool for CNC machining centers. Background Technology

[0002] When turning the outer diameter on a lathe, the part is fixed to the spindle, given a certain speed, and then the tool feeds to turn the outer diameter. However, it cannot fix parts with complex shapes and angles. For such parts, it can only be machined by CNC machining centers (including horizontal and vertical machining centers). CNC machining centers can only use three-flute end mills or grooving cutters (the cutters need to perform contour cutting along the surface of the part; grooving cutters have poor rigidity and are therefore only suitable for small-diameter machining) to machine the outer diameter circle by circle. When encountering parts with large machining allowances, it is necessary to repeatedly perform contour milling around the outer diameter, which takes a long time and is inefficient. If a boring bar (usually used for machining internal holes, expanding holes, outer diameters, and contouring) is used to machine the outer diameter, the adjustable parameters of the outer diameter are small and the tool cost is high. If chamfering is required, tool changing and chamfering are also required, which takes a long time, increases manufacturing costs, and lengthens the manufacturing cycle.

[0003] The traditional method of machining parts using CNC machining centers is to use a T-groove cutter to perform contour machining layer by layer according to the outer dimensions of the part. When a large amount of material needs to be removed, the cost is relatively high.

[0004] Therefore, it is necessary to design a profile milling cutter to reduce the time spent repeatedly feeding and cutting around the outer circle of the part. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an adjustable outer diameter profile cutting tool for CNC machining centers. It is a profile milling cutter with replaceable inserts. A chamfering tool is designed at the tail end of the tool. After the feed tool has machined the outer diameter, chamfering can be performed without changing the tool. The inserts are ordinary lathe tool inserts, which have the advantages of low processing cost and high processing efficiency.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: An adjustable outer diameter profile cutting tool for CNC machining center includes a transverse tool holder mounted on a tool holder, a vertical tool holder vertically mounted on the transverse tool holder, a first insert for cutting the outer diameter of a shaft-like part disposed at the front end of the vertical tool holder, and a second insert for chamfering the tail end of the shaft-like part disposed at the rear end of the vertical tool holder; an arc-shaped transition surface is provided at the connection between the vertical tool holder and the transverse tool holder; the clearance angle β of the first insert and the second insert is 7°, and the tool tip radius is 0.8.

[0007] A further improvement of this utility model is that the radius of curvature R of the arc-shaped transition surface is 5-8mm, and the surface is polished to a roughness of Ra0.8 or less.

[0008] A further improvement of this utility model is that both the first blade and the second blade are mounted on the vertical blade holder by fastening bolts.

[0009] A further improvement of this utility model is that: the blade tips of the first blade and the second blade are both provided with blade tip protection chamfers at the points where they meet the vertical blade shank.

[0010] A further improvement of this utility model is that the length L1 of the transverse cutter bar is greater than the height of the vertical cutter bar.

[0011] A further improvement of this utility model is that both the first blade and the second blade are ordinary lathe tool blades.

[0012] A further improvement of this utility model is that when the transverse tool bar is installed on the tool holder, the length of the transverse tool bar is adjustable to adapt to the machining requirements of outer circles with different diameters.

[0013] A further improvement of this utility model is that: the end of the transverse tool bar is provided with a laser tool setting reference surface, and the surface is coated with a wear-resistant reflective coating.

[0014] A further improvement of this utility model is that the tolerance of the tool tip arc is controlled within ±0.02mm, and the back angle machining error does not exceed ±0.5°.

[0015] A further improvement of this utility model is that the connection end between the transverse tool holder and the tool holder is provided with a T-slot structure for quick tool clamping and radial fine adjustment.

[0016] The technological advancements achieved by this utility model due to the adoption of the above technical solution are as follows: 1. This utility model addresses the machining of complex rotating parts on CNC machining centers. It features an adjustable profile milling cutter designed according to the part's dimensions. First, the first insert at the front end cuts material radially according to the part drawing. Then, the second insert at the rear end chamfers the tail end of the part. The milling process is completed in a single feed. Compared to traditional machining (grooving cutters), which eliminates the need for repeated profile milling around the outer circle, this significantly improves the machining efficiency of CNC machining centers for shaft-type parts and reduces production costs. 2. This utility model is comparable to similar special-purpose machining tools (such as boring tools), and has a wider adjustable machining range.

[0017] 3. Because a second blade is provided at the rear end of the cutting tool, the chamfering of shaft parts can be performed without changing the tool during the feeding process.

[0018] 4. In this utility model, since the surface roughness requirement of shaft parts is low, relatively low-cost lathe tool inserts can be used to rough the parts, which further reduces the production cost compared with boring tool inserts. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a front view of an adjustable outer diameter contour cutting tool for CNC machining center provided in this embodiment of the utility model; Figure 2 This is a schematic diagram showing the dimensioning of an adjustable outer circle profile cutting tool for CNC machining center provided in this embodiment of the utility model; Figure 3 This is an embodiment of the present utility model. Figure 1 AA cross-section diagram; Figure 4 This is a side view of an adjustable outer diameter contour cutting tool for CNC machining center provided in this embodiment of the utility model; The components include: 1. First blade; 2. Second blade; 3. Horizontal blade; 4. Vertical blade; 5. Blade tip protection chamfer; and 6. Fastening bolt. Detailed Implementation

[0020] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products or devices.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments: like Figure 1 , 3 As shown in Figure 4, an adjustable outer diameter contouring tool for CNC machining center is characterized by comprising: a transverse tool holder 3 mounted on a tool holder, a vertical tool holder 4 vertically mounted on the transverse tool holder 3, a first insert 1 for cutting the outer diameter of shaft-like parts mounted at the front end of the vertical tool holder 4, and a second insert 2 for chamfering the tail end of shaft-like parts mounted at the rear end of the vertical tool holder 4; an arc-shaped transition surface is provided at the connection between the vertical tool holder 4 and the transverse tool holder 3; the back angle β of the first insert 1 and the second insert 2 is 7°, and the tool tip radius is 0.8.

[0024] Furthermore, the radius of curvature R of the arc transition surface is 5-8 mm, and the surface is polished to a roughness of Ra0.8 or less.

[0025] Furthermore, both the first blade 1 and the second blade 2 are mounted on the vertical blade holder 4 by fastening bolts 6, which facilitates the replacement of worn blades.

[0026] Furthermore, both the first blade 1 and the second blade 2 have a blade tip protection chamfer 5 at the point where their tips meet the vertical blade shank 4. When the blade is under stress, the blade tip located at the blade tip protection chamfer 5 is also under stress. The blade tip protection chamfer 5 is designed to prevent this part of the blade tip from being under stress, thus avoiding damage to the blade tip located at the blade tip protection chamfer 5 and extending the service life of the blade.

[0027] Furthermore, the length L1 of the transverse tool holder 3 is greater than the height of the vertical tool holder 4.

[0028] Furthermore, both the first blade 1 and the second blade 2 are ordinary lathe tool inserts.

[0029] Furthermore, when the transverse tool holder 3 is mounted on the tool holder, its length is adjustable to accommodate machining requirements for outer diameters of varying sizes. The machining range of the tool is achieved by adjusting the tool holder length and insert position, offering high flexibility. This tool is suitable for machining shaft parts with complex shapes and angles, expanding the application range of CNC machining centers.

[0030] Furthermore, the end of the transverse tool holder 3 is provided with a laser tool setting reference surface, and the surface is coated with a wear-resistant reflective coating.

[0031] Furthermore, the tolerance of the tool tip radius is controlled within ±0.02mm, and the machining error of the clearance angle β does not exceed ±0.5°.

[0032] Furthermore, the connection end between the transverse tool holder 3 and the tool holder is provided with a T-slot structure for quick tool clamping and radial fine adjustment.

[0033] The specific dimensions of the contour cutting tool can be set according to the specific dimensions of the shaft-like parts to be machined. The specific dimensions of the contour cutting tool provided in this embodiment are as follows: Figure 2 As shown, the side length a of the first blade 1 and the second blade 2 is 12mm. The length L1 of the profile cutting tool is 103.8mm, the height H1 is 59.7mm, the height h1 from the center of the first blade 1 to the cutting point (chamfer) of the second blade 2 is 18mm, the distance h2 from the center of the second blade 2 to the upper surface of the transverse tool holder 3 is 10mm, the distance L2 from the center of the second blade 2 to the bottom of the transverse tool holder 3 is 84.2mm, the diameter of the tool tip protection chamfer 5 is 3mm, the height h3 of the transverse tool holder 3 is 19mm, the width L3 of the transverse tool holder 3 is 19mm, the thickness L4 of the first blade 1 and the second blade 2 is 4.5mm, the distance L5 from the outer surface of the first blade 1 and the second blade 2 after installation to the outer surface of the transverse tool holder 3 is 5mm, the radius of curvature R of the arc transition surface is 5mm, and the specification of the fastening bolt 6 is 2*M5. Two blade mounting slots are provided on the vertical tool holder 4. Blade mounting holes are drilled in the blade mounting slots, and a blade tip protection chamfer 5 is drilled on the inner side of the blade mounting slots.

[0034] Working principle: The connection between the components is similar to that of other cutting tools. The first blade 1 and the second blade 2 are both mounted on the vertical tool holder 4 by fastening bolts 6, the transverse tool holder 3 is mounted on the tool holder by side fastening bolts, and the tool holder is also mounted on the tool shank by bolts.

[0035] The spindle of the CNC machining center drives the tool holder, tool bar (horizontal tool bar 3 and vertical tool bar 4, with the horizontal tool bar 3 mounted on the tool holder and the vertical tool bar 4 facing downwards), and cutting inserts (first insert 1 and second insert 2, with the first insert 1 at the lower end of the second insert 2) to rotate around the tool holder and feed along the spindle direction to form cutting. The first insert 1 cuts and removes radial material according to the shaft part drawing, that is, it cuts the outer circle of the shaft part. After the cutting is completed, the relative position of the second insert 2 and the shaft part is adjusted to chamfer the shaft part. The milling process can be completed in one feed, that is, the tool can chamfer the tail end after cutting the outer circle without changing the tool.

[0036] Both the first insert 1 and the second insert 2 are ordinary lathe tool inserts, model SCMT120408-UM, with a tool clearance angle β of 7° and a tool tip radius of 0.8. These inserts are low-cost, have a large stock, and can be replaced promptly when worn. The profile milling cutter has a relatively long transverse shank 3, allowing it to machine a wide range of outer diameters. Using a tool setter, the diameter of shaft parts after machining can be accurately guaranteed, minimizing errors.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A contour cutting tool with an adjustable outer diameter for CNC machining center, characterized in that: It includes a transverse tool holder (3) mounted on a tool holder, a vertical tool holder (4) vertically mounted on the transverse tool holder (3), a first cutting tool (1) for cutting the outer circle of a shaft part mounted at the front end of the vertical tool holder (4), and a second cutting tool (2) for chamfering the tail end of a shaft part mounted at the rear end of the vertical tool holder (4); an arc-shaped transition surface is provided at the connection between the vertical tool holder (4) and the transverse tool holder (3); the back angle β of the first cutting tool (1) and the second cutting tool (2) is 7°, and the tool tip arc is 0.

8.

2. The adjustable outer diameter contouring tool for CNC machining center according to claim 1, characterized in that: The radius of curvature R of the arc-shaped transition surface is 5-8 mm, and the surface is polished to a roughness of Ra0.8 or less.

3. The adjustable outer diameter contouring tool for CNC machining center according to claim 1, characterized in that: The first blade (1) and the second blade (2) are both mounted on the vertical blade bar (4) by fastening bolts (6).

4. The adjustable outer diameter contour cutting tool for CNC machining center according to claim 1, characterized in that: Both the first blade (1) and the second blade (2) have a blade tip protection chamfer (5) at the point where the blade tip meets the vertical blade bar (4).

5. A contour cutting tool with an adjustable outer diameter for CNC machining center processing according to claim 1, characterized in that: The length L1 of the transverse cutter bar (3) is greater than the height of the vertical cutter bar (4).

6. A contour cutting tool with an adjustable outer diameter for CNC machining center as described in claim 1, characterized in that: Both the first blade (1) and the second blade (2) are ordinary lathe tool blades.

7. A contour cutting tool with an adjustable outer diameter for CNC machining center processing according to claim 1, characterized in that: When the transverse tool holder (3) is installed on the tool holder, the length of the transverse tool holder (3) is adjustable to adapt to the machining requirements of outer circles with different diameters.

8. A contour cutting tool with an adjustable outer diameter for CNC machining center processing according to claim 1, characterized in that: The end of the transverse tool bar (3) is provided with a laser tool setting reference surface, and the surface is coated with a wear-resistant reflective coating.

9. A contour cutting tool with an adjustable outer diameter for CNC machining center as described in claim 1, characterized in that: The tolerance of the tool tip radius is controlled within ±0.02mm, and the machining error of the back angle does not exceed ±0.5°.

10. A contour cutting tool with an adjustable outer diameter for CNC machining center processing according to claim 1, characterized in that: The transverse tool holder (3) is provided with a T-slot structure at the connection end with the tool holder for quick tool clamping and radial fine adjustment.

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