High-precision special positioning type ball head milling blade

Abstract

The utility model discloses a high-precision special positioning type ball head milling blade, which belongs to the technical field of milling blades and comprises a cutter body component, the cutter body component comprises an upper cutter body and a lower cutter body, the lower cutter body is mounted at the bottom of the upper cutter body, and an inner limiting rail is arranged in the lower cutter body; the blade assembly comprises a positioning blade, the positioning blade comprises a blade body, a limiting seat is arranged at the top of the blade body, the limiting seat is in limiting clamping connection with the inner limiting rail, the blade body is embedded and attached to the inner limiting rail through the limiting seat, the attaching degree of the blade body is improved, meanwhile, movement of the blade body is greatly reduced, and precision is improved; the asymmetrical V-shaped blade shape is applied, so that the blade body achieves the centripetal property under the action of three-dimensional cutting force, the blade body has high self-centering capacity, and the phenomenon that the blade moves in the cutting machining process is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the milling blade field, specifically, relate to a high accuracy special positioning type ball head milling blade. BACKGROUND

[0002] The existing ball head milling blade can be applied in profile milling, spiral milling, arc milling, die sinking and other machining occasions, which is generally a semicircular body, and the upper and lower end faces and the side wall are working surfaces, the upper and lower working surfaces are divided by a cutting edge, the screw hole is through the front face and the lower end face of the blade, and is installed on the corresponding cutting tool body.

[0003] In the actual cutting process, the three positioning surfaces of the milling blade are all flat, and the screw hole and the screw are in clearance fit, so there is a gap. Under the action of cutting resistance, the blade and the tool body often move. Since the ball head blade is a high-precision milling blade, in order to ensure the precision and service life of the blade, the precision of the screw hole and the screw positioning surface of the blade needs to be greatly improved to ensure the assembly precision. However, improving the precision will greatly increase the processing difficulty, increase the cost of the tool and reduce the yield. UTILITY MODEL CONTENTS

[0004] In order to make up for the above shortcomings, the utility model provides a high-precision special positioning type ball head milling blade, which aims to improve the tool precision while increasing the processing difficulty, increasing the cost and reducing the yield.

[0005] The utility model is implemented as follows: a high-precision special positioning type ball head milling blade, comprising

[0006] A tool body assembly, the tool body assembly comprises an upper tool body and a lower tool body, the lower tool body is installed at the bottom of the upper tool body, and an inner limiting rail is formed in the lower tool body.

[0007] A blade assembly, the blade assembly comprises a positioning blade, the positioning blade comprises a blade body, a limiting seat is arranged at the top of the blade body, and the limiting seat is limitingly connected with the inner limiting rail.

[0008] In a preferred technical scheme of the utility model, the lower tool body comprises a tool body head, an inner limiting rail is formed in the tool body head, and the inner limiting rail is arranged in an inverted V shape.

[0009] In a preferred technical scheme of the utility model, the inner limiting rail is asymmetrically V-shaped.

[0010] In a preferred technical scheme of the utility model, the middle part of the cutter head is provided with a through hole, the through hole of the cutter head is provided with a locking rod, and the end of the locking rod is inserted into the through hole and connected with the other side of the cutter head.

[0011] In a preferred technical scheme of the utility model, the end of the locking rod is fixedly connected with a bolt head, the end of the bolt head is provided with a hexagonal groove, one side of the cutter head is provided with a stepped side mounting groove corresponding to the bolt head, and the bolt head is provided in a circular table shape.

[0012] In a preferred technical scheme of the utility model, one side of the cutter head opposite to the side mounting groove is provided with an internal thread matched with the locking rod, and the locking rod is threadedly connected with the cutter head.

[0013] In a preferred technical scheme of the utility model, the middle part of the cutter blade is provided with a through hole, the through hole of the middle part of the cutter blade is correspondingly provided with the locking rod, the cutter head is provided in an n shape, and the cutter blade is located inside the cutter head.

[0014] In a preferred technical scheme of the utility model, the bottom of the cutter blade is provided with a blade sharpening device on both sides.

[0015] In a preferred technical scheme of the utility model, the blade sharpening device is arranged in an anti-symmetrical shape, and the blade of the blade sharpening device is provided in a spiral structure.

[0016] In a preferred technical scheme of the utility model, the limiting seat is provided in an asymmetric V shape, and the limiting seat is correspondingly and limitingly connected with the internal limiting rail.

[0017] The utility model discloses a beneficial effect is: the utility model discloses a kind of high-precision special positioning type ball head milling blade by above design, when installing to positioning blade, blade body is matched with limit seat and is inserted into the inner limit rail of the bottom of cutter head, at this time, locking rod is penetrated through the through hole of cutter head two sides and is penetrated through the through hole of the middle part of the blade body, locking rod is screwed in the through hole and is locked at this time, wherein the length ratio of asymmetry is under the advantage of V-shaped structure self-centering, so that it further strengthens the rigidity of tool whole, improves the strength and stability of tool, and impact resistance is improved compared with flat positioning, since the advantage of V-shaped structure and asymmetric length, precision and stability are guaranteed, compared with the precision of ordinary flat positioning blade, rely on the high-precision cooperation between screw hole and screw positioning surface, in order to guarantee its assembly precision, the machining precision (fitting clearance, roughness, geometric tolerance) of screw hole and screw positioning surface is constantly improved, so that processing difficulty increases, yield is low, cost increases greatly and so on, and the utility model asymmetric V-shaped positioning ball head blade can appropriately reduce the machining precision of blade screw hole and screw accessory under the premise of guaranteeing precision, yield is improved, processing difficulty is reduced, and cost can be well controlled. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced to the drawings needed to be used in the embodiments, it should be understood that the following drawings only show some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for ordinary skilled person in the art, under the premise of not paying creative labor, other related drawings can also be obtained according to these drawings.

[0019] Figure 1 It is the side structure schematic view provided by the utility model embodiment;

[0020] Figure 2 It is the split structure schematic view provided by the utility model embodiment;

[0021] Figure 3 It is the lower cutter body structure schematic view provided by the utility model embodiment;

[0022] Figure 4 It is the positioning blade structure schematic view provided by the utility model embodiment.

[0023] In the drawing: 100, cutter assembly;110, upper cutter body;120, lower cutter body;121, cutter head;122, inner limit rail;123, side installation groove;125, locking rod;126, bolt head;200, blade assembly;210, positioning blade;211, blade body;212, cutting edge;213, limit seat. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be described clearly and completely in combination with the drawings in the utility model embodiment. Obviously, the described embodiment is part of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0025] Please refer to Figure 1 and Figure 2 The utility model provides a technical scheme: a high-precision special positioning type ball head milling blade, comprising

[0026] The cutter body assembly 100 comprises an upper cutter body 110 and a lower cutter body 120, the lower cutter body 120 is installed at the bottom of the upper cutter body 110, and an inner limiting rail 122 is formed in the lower cutter body 120.

[0027] The blade assembly 200 comprises a positioning blade 210, the positioning blade 210 comprises a blade body 211, a limiting seat 213 is arranged at the top of the blade body 211, the limiting seat 213 is limitedly connected with the inner limiting rail 122, the blade body 211 is embedded and matched with the inner limiting rail 122 through the limiting seat 213, the matching degree of the blade body 211 is improved, the movement of the blade body 211 is greatly reduced, the precision is improved, the asymmetric V-shaped blade shape is used to realize the centripetal property of the blade body 211 under the action of 3-dimensional cutting force, so that the blade body 211 has strong self-centering ability, and the blade movement phenomenon in the cutting process is solved.

[0028] Please refer to Figure 3 and Figure 4 The lower cutter body 120 comprises a cutter body head 121, the inner limiting rail 122 is formed in the cutter body head 121, and the inner limiting rail 122 is arranged in an inverted V shape. The inner limiting rail 122 is asymmetrically V-shaped, the matching degree of the cutter body head 121 and the blade body 211 is improved, and the movement of the blade body 211 is effectively avoided.

[0029] The middle part of the cutter body head 121 is provided with a through hole, a locking rod 125 is arranged in the through hole of the cutter body head 121, and the end of the locking rod 125 is inserted into the through hole and connected with the other side of the cutter body head 121. The end of the locking rod 125 is fixedly connected with a bolt head 126, the end of the bolt head 126 is provided with a hexagonal groove, one side of the cutter body head 121 is provided with a stepped side mounting groove 123 corresponding to the bolt head 126, and the bolt head 126 is provided in a circular table shape. The opposite side of the cutter body head 121 and the side mounting groove 123 is provided with an internal thread matched with the locking rod, and the locking rod is threadedly connected with the cutter body head.

[0030] The middle part of the cutter body head 121 is provided with a through hole, a locking rod 125 is arranged in the through hole of the cutter body head 121, and the end of the locking rod 125 is inserted into the through hole and connected with the other side of the cutter body head 121. The end of the locking rod 125 is fixedly connected with a bolt head 126, the end of the bolt head 126 is provided with a hexagonal groove, one side of the cutter body head 121 is provided with a stepped side mounting groove 123 corresponding to the bolt head 126, and the bolt head 126 is provided in a circular table shape. The opposite side of the cutter body head 121 and the side mounting groove 123 is provided with an internal thread matched with the locking rod, and the locking rod is threadedly connected with the cutter body head.

[0031] Finite element analysis of positioning angle: analysis range: positioning angle of 5°~35°.

[0032] Simulation mode: install the ball head cutter with different positioning angles on the cutter body to simulate the maximum stress deformation of the cutter body.

[0033] Result: when the positioning angle is 25°, the stress deformation of the cutter body is the smallest, which means that the impact resistance of the cutter body is the strongest.

[0034] Finite element analysis of length ratio of positioning surface:

[0035] Analysis range: select different length ratios (1:1, 1:1.25, 1:1.5, 1:1.75, 1:2).

[0036] Simulation mode: select the length ratio with the smallest overall stress deformation of the cutter body through finite element analysis.

[0037] Result: when the length ratio is 1:2, the overall stress deformation is the smallest.

[0038] Through the above finite element analysis, it is known that the asymmetric V-shaped structure positioning surface (positioning angle of 25° and length ratio of 1:2) compared with the ordinary flat positioning ball head cutter has further improved in precision and tool stability.

[0039] Working principle: when installing the positioning blade 210, the blade body 211 is matched with the limiting seat 213 and is clamped into the inner limiting rail 122 at the bottom of the blade body head 121, at this time the locking rod 125 is penetrated through the through hole on both sides of the blade body head 121 and the through hole in the middle of the blade body 211, and the locking rod 125 is screwed and locked in the through hole, at this time the locking rod 125 is locked with the blade body head 121.

[0040] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-precision special-positioning ball-end milling insert, characterized by, Comprising The knife body assembly includes an upper knife body and a lower knife body, the lower knife body is mounted at the bottom of the upper knife body, and the inside of the lower knife body is provided with an inner limiting rail; The blade assembly includes a positioning blade, the positioning blade includes a blade body, the top of the blade body is provided with a limiting seat, and the limiting seat is limited and connected with the inner limiting rail; The middle part of the blade body is provided with a through hole, the through hole of the middle part of the blade body is correspondingly provided with the locking rod, the knife head is provided in the shape of n, and the blade body is located in the inside of the knife head; The bottom of the blade body is provided with a cutting edge on both sides, the cutting edge is arranged in an anti-symmetrical shape, and the cutting edge is in the shape of a spiral structure; The limiting seat is in the shape of an asymmetric V, and the limiting seat is correspondingly limited and connected with the inner limiting rail. The lower knife body includes a knife head, the inside of the knife head is provided with an inner limiting rail, and the inner limiting rail is provided in the shape of an inverted V.

2. The high-precision special-positioning ball-end milling insert according to claim 1, characterized in that: The middle part of the knife head is provided with a through hole, the locking rod is provided in the through hole of the knife head, and the end of the locking rod is inserted into the through hole and limitedly connected with the other side of the knife head.

3. The high-precision special-positioning ball-end milling blade according to claim 2, characterized in that: The end of the locking rod is fixedly connected with a bolt head, the end of the bolt head is provided with a hexagonal groove, one side of the knife head is provided with a stepped side mounting groove corresponding to the bolt head, and the bolt head is provided in the shape of a circular table.

4. The high-precision special-positioning ball-end milling blade according to claim 2, characterized in that: The side opposite to the side mounting groove of the knife head is provided with an inner thread matched with the locking rod, and the locking rod is threadedly connected with the knife head.

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