Integral closed impeller cutting anti-vibration milling cutter

Abstract

The utility model discloses an integrally closed impeller cutting anti-vibration milling cutter, which belongs to the field of cutter equipment, and adopts the process technology that according to the proportional relation of the length-diameter ratio of the milling cutter, the milling cutter can be provided with multi-stage different structural forms for reducing, and the inside and the outside of a cutter body are unevenly filled with materials different from those of the cutter. Compared with a traditional single-taper variable-diameter milling cutter, the double-taper variable-diameter milling cutter has the advantages that the manufacturing precision of aviation integrally-closed impeller structures, deep-cavity structural parts or ultrathin structural parts is improved, the machining efficiency is improved, the stability of production quality is effectively guaranteed, and the service life of the cutter is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tool technical field, specifically relates to a whole closed impeller cutting anti-vibration milling cutter and processing method. BACKGROUND

[0002] The whole closed impeller is the key core product of modern aviation, aerospace environmental control system and high-tech equipment environmental control system, and is high in shape size precision and surface cutting precision.

[0003] For such structural parts, the size precision and surface precision are high, and the clamping overhang of the cutter is very large in the milling process.

[0004] The utility model relates to a whole closed impeller structural part, and a milling cutter for reducing cutter cutting vibration in the milling manufacturing process. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problems that the cutter cutting vibration is large, the product surface precision is poor, the shape precision error of the blade and the flow channel surface is large, and the processing qualified rate is low in the cutting processing of the whole closed impeller structural part.

[0006] In order to solve the above technical problems, the technical scheme of the utility model is: a whole closed impeller cutting anti-vibration milling cutter, including cutter body, the shape of the cutter body is one or more different geometric structure form variable diameter, the geometric structure includes circular arc, quadratic curve, spline curve, taper, the inside of the cutter body is hollow design, and the hollow part is filled with soft low melting point alloy, a plurality of grooves are arranged in the local outer circle of the cutter body in the axial direction, and the grooves are filled with soft low melting point alloy.

[0007] Preferably, the cutter body is used in single structure shape or multiple form combination by circular arc, quadratic curve, spline curve and taper.

[0008] Preferably, the grooves are unevenly distributed.

[0009] Preferably, the hollow cross section geometry inside the cutter body includes circle, equilateral triangle, polygon and I shape.

[0010] Preferably, the hollow shape inside the cutter body is cylindrical or conical.

[0011] Preferably, the cylindrical shape includes cylindrical hole and polygonal cylindrical hole.

[0012] Preferably, the conical shape includes conical hole and polygonal conical hole.

[0013] The utility model discloses a whole closed impeller cutting anti-vibration milling cutter and a processing method thereof.

[0014] (1). Cutter body shape, can design one or more different geometric structure form variable diameter, such as: geometric structure form can select: circular arc, quadratic curve, spline curve, taper, can use single structure shape or multiple form combination, different geometric body transition r transition, take: 3≤r≤100.

[0015] (2). Variable diameter transition under the condition that the use environment needs are met, selects simple structure variable diameter transition, such as circular arc R, taper η, take: 2°≤η≤60°, take: 100≤R≤500.

[0016] (3). Cutter body inside partial hollow design, and the cross section shape can be set to multiple geometric shapes, such as: circle, equilateral triangle, polygon, I shape.

[0017] 1): Hollow geometric shape body should be distributed on the cutter rotation center position, and the concentricity epsilon is less than or equal to 0.03, when being distributed at two places or more, should be evenly distributed around the cutter rotation center.

[0018] Take: epsilon is less than or equal to 0.03

[0019] Take: delta is less than or equal to ± 0.05.

[0020] 2): After the hollow processing of the tool body, the maximum size e of the hollow cross section is not greater than the minimum thickness size E of the tool body cross section, then: e≤E;

[0021] 3): The hollow processing depth h of the tool body can be maximized without affecting the thickness size E of the tool body cross section;

[0022] 4): The cross section shape is selected, such as circle, equilateral triangle, polygon, and I-shaped; when the equilateral triangle and equilateral polygon geometric shapes are used, the adjacent edges are transitioned by circular arcs a to avoid stress concentration; a = 0.3-5;

[0023] (4). Under the premise of ensuring the overall rigidity of the tool, in order to minimize the cutting vibration of the tool, the tool body is partially hollow inside and is provided with a shape of a cylindrical hole or a conical hole; such as a cylindrical hole, a conical hole, a polygonal cylindrical hole, and a polygonal conical hole, then: the taper β of the conical hole; β = 1:20-1:300;

[0024] (5). The partially hollow part inside the tool body is filled with a material different from the tool body material, and the filling material is a soft low-melting point tin-lead alloy;

[0025] (6). The overhanging tool shank of the tool body is provided with grooves of certain shape, size, and number in the circumferential direction along the axis, which are designed to be unevenly distributed, and the number of grooves is even;

[0026] 1): The cross section of the groove is in the form of a circular arc, the depth S, and the length along the axis. The circular arc length q of the groove 凹槽 , the arc length Q of the tool shank 刀杆 , and 0.3≤S≤0.8, q 凹槽 ≤Q 刀杆 N is even;

[0027] 2): Corresponding two grooves are set as a group, the depth of one group or two groups of grooves is taken, the groove depth size difference ε, or the arc length size is smaller than that of other grooves, and the arc length size difference

[0028] 0.1≤ε≤3

[0029] 3): The length size L of the groove. The length of the groove does not connect with the projection of the tool body hollow special-shaped hole, considering the overall rigidity of the tool, and a size V is set, and the groove is designed at the equal cross section of the tool shank variable diameter;

[0030] 5≤L≤300

[0031] 3≤V≤30;

[0032] 4): In the tool body overhanging tool bar groove, fill soft low melting point tin lead alloy, after cooling, the alloy filling place is polished with the tool body concentric, concentricity t; take: 0.01≤t≤0.05.

[0033] Preferably, the melting point of the soft low melting point tin lead alloy is 180-230 DEG C.

[0034] Compared with the prior art, the beneficial effects of the utility model are: adopting the utility model whole closed impeller cutting anti-vibration milling cutter, through improving the shape, structure of milling cutter and the application of different alloy materials, so as to reduce the vibration of milling cutter milling, thus reducing the milling vibration in the milling manufacturing process, improving the manufacturing precision of aviation whole closed impeller structure, aviation deep cavity structure parts or ultrathin structure parts, effectively guaranteeing the stability of production quality, ensuring good product quality, performance and design requirements. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is the structure schematic view of the utility model whole closed impeller cutting anti-vibration milling cutter;

[0036] Figure 2 It is the A-A sectional view of the utility model; Figure 1

[0037] Figure 3 It is the B-B sectional view of the utility model; Figure 1

[0038] Figure 4 It is the utility model tool body outer circle filling section view (filling section size is uneven);

[0039] Figure 5 The utility model tool body internal filling multiple section shape schematic view;

[0040] Figure 6 It is the main sectional view of the utility model whole closed impeller cutting anti-vibration milling cutter;

[0041] Figure 7 It is the local enlarged view of a portion in the utility model; Figure 6 DETAILED DESCRIPTION

[0042] The specific embodiments of the utility model are further explained in combination with the drawings. It needs to be explained here that the explanation of these embodiments is used to help understanding the utility model, but does not constitute the limitation to the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined mutually as long as they do not conflict with each other.

[0043] As Figures 1 to 6 ​​​As shown in the utility model discloses a whole closed vane cutting anti-vibration milling cutter, specifically includes cutter body 1, the appearance shape of the cutter body 1 of the utility model is one or more different geometric structure form variable diameter, and its geometric structure includes circular arc, quadratic curve, spline curve, taper, the inside of cutter body 1 is hollow design, and fills soft low melting point alloy 10 at the hollow place thereof, and the local outer circle of cutter body 1 is provided with a plurality of grooves 2 in the axial direction, and the groove 2 is filled with soft low melting point alloy 10, and the groove 2 is unevenly distributed design.

[0044] The cutter body 1 of the utility model can be used in single structure form or multiple form combination by circular arc, quadratic curve, spline curve and taper.

[0045] As a further improvement, as Figure 5 As shown in the utility model discloses the hollow cross-sectional geometric shape inside the cutter body 1 includes circle, equilateral triangle, polygon and I-shaped;

[0046] Further improvement, the hollow shape inside the cutter body 1 is cylindrical or conical, such as cylindrical hole, conical hole, polygonal cylindrical hole and polygonal conical hole.

[0047] The utility model also discloses a machining method of the whole closed vane cutting anti-vibration milling cutter, and the method comprises the following steps:

[0048] (1) the appearance shape of the cutter body can be designed to be one or more different geometric structure form variable diameter, such as the geometric structure form can be selected as circular arc, quadratic curve, spline curve and taper, and the single structure form or multiple form combination can be used, and the different geometric bodies are connected at r, and 3≤r≤100 is taken;

[0049] (2) the variable diameter is connected under the condition that the use environment needs are met, and the simple structure variable diameter (circular arc R and taper η) is selected, and 2°≤η≤60° is taken, and 100≤R≤500 is taken;

[0050] (3) the cutter body is partially hollow designed inside, and the cross-sectional shape can be set to multiple geometric shapes, such as circle, equilateral triangle, polygon and I-shaped;

[0051] 1) the hollow geometric shape body should be distributed on the rotary center position of the cutter, and the concentricity ε≤0.03, when being distributed at two or more places, the hollow geometric shape body should be evenly distributed around the rotary center of the cutter;

[0052] ε≤0.03 is taken

[0053] δ≤±0.05 is taken

[0054] 2) after the hollow processing of the cutter body, the maximum size e of the hollow cross section is not greater than the minimum thickness size E of the cross section of the cutter body, and e≤E.

[0055] 3): the hollow processing depth h in the tool body can be maximized without affecting the thickness dimension E of the tool body section;

[0056] 4): the cross-sectional shape is selected, such as a circle, an equilateral triangle, a polygon, and an I-shaped section; when the equilateral triangle and the equilateral polygon have geometric shapes, each adjacent side is transitioned by an arc a to avoid stress concentration; a = 0.3-5;

[0057] (4). In order to minimize the cutting vibration of the tool as much as possible under the premise of ensuring the overall rigidity of the tool, the tool body is partially hollow inside and is provided in the shape of a cylindrical hole or a conical hole; such as a cylindrical hole, a conical hole, a polygonal cylindrical hole, and a polygonal conical hole, wherein the taper β of the conical hole is 1:20-1:300;

[0058] (5). The partially hollow part inside the tool body is filled with a material different from the tool body material, and the filling material is a soft low-melting point tin-lead alloy; the soft low-melting point tin-lead alloy (AgPbSn36-60, Sn99.5) selects a low-melting point tin-lead alloy with a melting point temperature of 180-230°C;

[0059] (6). The overhanging tool shank of the tool body is provided with grooves of a certain shape, size, and number in the direction of the outer circle axis, which are designed to be unevenly distributed, and the number of grooves is an even number;

[0060] 1): the cross section of the groove is in the shape of an arc, the depth is S, and the length is along the axis. The arc length of the groove is q, and the arc length of the tool shank is Q, wherein 0.3≤S≤0.8, q 凹槽 ≤Q 刀杆 N is an even number;

[0061] 2): a corresponding two grooves are set as a group, the depth of one group or two groups of grooves is taken, the groove depth size difference ε is taken, or the arc length size is smaller than that of other grooves, and the arc length size difference

[0062] 0.1≤ε≤3

[0063] 3): the groove length size L. The groove length is not connected with the projection of the tool body hollow special-shaped hole, considering the overall rigidity of the tool, and a size V is set, and the groove is designed in the same section at the variable diameter of the tool shank;

[0064] 5≤L≤300,

[0065] 3≤V≤30;

[0066] 4): In the tool body overhanging tool bar groove, fill soft low melting point tin lead alloy (AgPbSn36-60, Sn99.5), the specific selection of melting point temperature 180-230 ℃ low melting point tin lead alloy, after cooling, the alloy filling is concentric with the tool body, the concentricity t is: 0.01≤t≤0.05.

[0067] The present example is applied to some key core parts of aerospace environmental control system equipment, that is, the manufacturing of complex curved surface ultrathin blade integral closed impeller, which requires high shape accuracy and surface quality. The manufacturing precision and quality are related to the stability of product manufacturing quality and process technology requirements. In order to meet the requirements of processing quality, technology and design performance in manufacturing, the structure of cutting tool is innovatively designed.

[0068] 1. The shape of the tool body can be designed with two-stage different geometric structure variable diameter transition: circular arc R variable diameter, taper θ variable diameter. The transition of different geometric bodies is r. The variable diameter transition is selected to be simple in structure under the condition of meeting the needs of the use environment.

[0069] Then: the circular arc R is: 180≤R≤185

[0070] The transition r is: 10≤r≤30

[0071] The taper θ is: 8°≤θ≤10°

[0072] 2. The tool body is designed to be partially hollow inside, and the cross-sectional shape can be designed as a polygonal geometric shape, which is a hexagon.

[0073] 1): The hollow geometric shape should be designed at the center of the tool rotation, and the concentricity ε≤0.02. The position error δ≤±0.012.

[0074] 2): After the tool body is hollowed, the maximum size e of the hollow cross section is not greater than the cross-sectional thickness size E of the tool body.

[0075] Then: e(5.1)≤E(5.5)

[0076] 3): The hollow processing depth h of the tool body can be maximized without affecting the cross-sectional thickness size E of the tool body.

[0077] Then: h=88

[0078] 4): When the cross-sectional shape is selected to have an angular geometric shape, the adjacent edges are transitioned by a circular arc (a) to avoid stress concentration.

[0079] Then: 0.3≤a≤0.8

[0080] 4. In order to reduce the cutting vibration of the tool as much as possible, the tool body is partially hollowed inside and a polygonal taper hole is set.

[0081] Taper of the taper hole: β = 1:36

[0082] 5. The inside of the cutter body is partially hollow, and a material different from the material of the cutter body is injected to fill the hollow part, and the injected filling material is a soft low-melting tin-lead alloy (AgPbSn36-60, Sn99.5). A low-melting tin-lead alloy with a melting point temperature of 180-230 DEG C is selected.

[0083] 6. The cutter body overhanging cutter bar is provided with grooves of certain shape, size and number on the outer circumference, and the grooves are designed to be unevenly distributed, and a soft low-melting tin-lead alloy different from the cutter body is used to fill the grooves. The filled grooves are concentrically finished with the cutter body.

[0084] 1): The cross section of the groove is in the shape of a circular arc, the depth is S, the length is along the axis, the circular arc length of the groove is q, the arc length of the cutter bar is Q, and the number of the grooves is N.

[0085] Take: 0.3≤S≤0.8

[0086] q(1.9)≤Q(2.3)

[0087] N = 6

[0088] 2): The number of grooves N is even and evenly distributed along the cutter bar, and corresponding two grooves are set as a group. The depth or arc length of one group or two groups of grooves is smaller than that of other grooves, and the groove depth size difference is ε. Take: 0.2≤ε≤0.5

[0089] 3): The length size L of the groove. The length of the groove does not connect with the projection of the hollow special-shaped hole of the cutter body, and a size V is considered, and the groove is set at the equal cross section of the variable diameter of the cutter bar.

[0090] Take: 70≤L≤80, V = 11

[0091] 4): The soft low-melting tin-lead alloy (AgPbSn36-60, Sn99.5) is filled in the grooves of the cutter body overhanging cutter bar. A low-melting tin-lead alloy with a melting point temperature of 180-230 DEG C is selected. After cooling, the alloy filling part is concentrically finished with the cutter body, and the concentricity t is obtained.

[0092] Take: t≤0.02

[0093] The utility model discloses a milling cutter with improved shape, structure and different alloy materials to reduce the milling vibration of the cutter, improve the manufacturing precision of the aviation integral closed impeller structure, aviation deep cavity structure parts or ultra-thin structure parts, effectively guarantee the stability of production quality, and ensure good product quality, performance and design requirements.

[0094] The embodiments of the present application are described in detail in combination with the drawings, but the present application is not limited to the described embodiments. For those skilled in the art, various changes, modifications, replacements and variations of the embodiments can be made without departing from the principles and spirits of the present application, and still fall within the protection scope of the present application.

Claims

1. A solid closed impeller cutting anti-vibration milling tool comprising a tool body (1), characterized in that, The shape of the cutter body (1) is one or more different geometric structure forms of variable diameter, which includes circular arc, quadratic curve, spline curve and taper; the inside of the cutter body (1) is hollow design, and the hollow part is filled with soft low melting point alloy (10); the local outer circle of the cutter body (1) is provided with a plurality of grooves (2) in the axial direction, and the grooves (2) are filled with soft low melting point alloy (10).

2. The solid closed impeller cutting anti-vibration milling cutter according to claim 1, characterized in that, The cutter body (1) is used in single structure shape or multiple form combination by circular arc, quadratic curve, spline curve and taper.

3. The solid closed impeller cutting anti-vibration milling cutter according to claim 1, characterized in that, The grooves (2) are designed to be unevenly distributed.

4. The solid closed impeller cutting anti-vibration milling cutter according to claim 1, characterized in that, The hollow cross-sectional geometry inside the cutter body (1) includes circle, equilateral triangle, polygon and I-shaped.

5. The solid closed impeller cutting anti-vibration milling cutter according to claim 1, characterized in that, The hollow shape inside the cutter body (1) is cylindrical or conical.

6. The solid closed impeller cutting anti-vibration milling cutter according to claim 5, characterized in that, The cylindrical shape includes cylindrical hole and polygonal cylindrical hole.

7. The solid closed impeller cutting anti-vibration milling cutter according to claim 5, characterized in that, The conical shape includes conical hole and polygonal conical hole.

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