Inverted cone rough milling cutter

Abstract

The utility model relates to an inverted cone rough milling cutter. According to an existing milling cutter, a side edge is changed from being parallel to an axis to forming a certain included angle with the axis, so that the side edge can enter the lower parts of closed-angle ribs and edge strips for cutting when the cutter is used for machining the inner shape of a part. However, the milling cutter with the structure is not suitable for rapid rough machining of products with large dovetail grooves, so that new products need to be researched and developed for improvement. The cutter comprises a cutter bar, a cutter handle and blades, the blades comprise four rows of square blades and round blades, the square blades are mounted on cutter holders, the square blades in adjacent rows are arranged in a staggered tooth manner, and the round blades are arranged at the outer ends of the cutter holders with the square blades in two opposite rows. According to the utility model, large dovetail groove products can be roughly machined, the allowance can be quickly removed, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the machining tool, especially a kind of inverted taper rough milling cutter. BACKGROUND

[0002] Application No.2017201449996 discloses a three-axis machine tool small head inverted taper milling cutter, including tool body, the tool body is composed of shank, blade and tool head, tool head is conical table, the diameter of the upper table of tool head is less than the diameter of lower table, the diameter of the lower table of tool head is equal to shank diameter, the shank is connected by blade and the upper table of tool head, the conical surface of tool head is equipped with several side edges, the side edges are longitudinally arranged along the slope direction of conical surface, the side edges and tool body axis form 2.5 ° to 10 angle of inclusion.

[0003] The milling cutter of this structure is that side edge is changed from original parallel to axis to certain angle of inclusion with axis, so that side edge can enter closed angle rib, under part cutting when tool is processed in part inner shape.But the milling cutter of this structure is not suitable for the rapid rough machining of the product with large swallow-tail groove, so new product needs to be developed for improvement. UTILITARY MODEL CONTENT

[0004] The utility model aims at overcoming the insufficient of prior art, provide a kind of inverted taper rough milling cutter, can be rough machined to large swallow-tail groove product and remove excess amount quickly, improve production efficiency.

[0005] Therefore, the utility model takes the following technical scheme: a kind of inverted taper rough milling cutter, including tool bar, shank and blade, the blade includes square blade and round blade, the square blade includes four columns installation on tool holder, and the square blade on adjacent column forms staggered teeth arrangement, and round blade is set in the outer end of the tool holder with square blade in two columns.

[0006] As preferred, the offset angle of the outer end face of tool holder relative to the horizontal center line of tool bar is 30 degrees.

[0007] As preferred, tool holder extends to four petal parts of upper and lower left and right along the center line of tool bar outward.

[0008] As preferred, tool bar is inverted conical from outside to inside.

[0009] As preferred, square blade and round blade are spaced and fixed on tool holder by blade screw.

[0010] As preferred, tool bar and shank are integrated structure.

[0011] The utility model has the beneficial effect that:

[0012] 1. By designing a combination structure of round and square inserts, the round insert directly brings out the bottom fillet, while the square insert obtains the machining length required by the customer, effectively dispersing the cutting force and reducing the vibration phenomenon caused by the cutting force.

[0013] 2. The tool adopts a one-piece design, which allows the cutting edge to be as close as possible to the tool holder, providing optimal tool rigidity and making the tool performance more stable.

[0014] 3. Compared to traditional cutting tools, this tool adopts a mechanical clamp design, which allows for quick blade replacement, reduces downtime, is suitable for mass production, and improves production efficiency. Attached Figure Description

[0015] Fig. 1 This is a three-dimensional structural diagram of the present invention.

[0016] Fig. 2 This is the front view of the present invention.

[0017] Fig. 3 This is a side view of the present invention.

[0018] In the picture: 1. Handle 2. Blade shank 3. Tool holder 4. Round blade 5. Square blade 6. Blade screw. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments.

[0020] like Figs. 1-3 As shown, this utility model discloses an inverted taper roughing cutter, including a cutter shank 2, a cutter holder 1, and inserts. The inserts include square inserts 5 and round inserts 4. The square inserts 5 are arranged in four rows on the cutter holder, with three square inserts in each row. The square inserts 5 in adjacent rows form a staggered tooth arrangement. Round inserts 4 are placed at the outer ends of the cutter holders with square inserts in two opposing rows. The staggered tooth arrangement of the inserts in adjacent rows forms the cutting edge, improving the stability and rigidity of the cutter. The round inserts directly bring out the bottom fillet, and then the square inserts obtain the machining length required by the customer, effectively dispersing the cutting force and reducing the vibration phenomenon caused by the cutting force.

[0021] Specifically, the outer end face of the tool holder 3 is offset by 30 degrees relative to the horizontal center line of the tool holder 2.

[0022] Specifically, the tool holder 3 extends outward from the center line of the tool holder 2 into four segments: top, bottom, left, and right. These four segments, together with the cutting blade, constitute the main structure of the cutting edge.

[0023] Specifically, the tool holder 2 is inverted conical in shape from the outside to the inside, that is, the diameter of the tool holder body gradually decreases from the outside to the inside.

[0024] Specifically, the square blade 5 and the round blade 4 are arranged at intervals and fixed on the tool holder by the blade screw 6. By screwing, the aged or worn blade can be conveniently disassembled and replaced, so that the tool maintains a better working state.

[0025] Specifically, the tool holder 1 and the tool bar 2 are integrated, and the tool holder part adopts a machine clamp type, which reduces downtime, is suitable for batch production, and improves production efficiency.

[0026] The utility model discloses a two round blades, 12 square blades are fixed through blade screw, mainly design for having the rough processing of big swallow groove product, and the cutting edge part can be closest to the handle clamping part, provides optimal tool rigidity, can make the tool performance more stable, can remove the excess amount quickly. Configuration round blade is convenient to bring out the bottom fillet directly, and square blade can be suitable for processing appropriate length, and cutting force is effectively dispersed, and the phenomenon of vibrating knife due to cutting force is reduced. In the cost aspect, although the initial purchase cost can be higher than traditional tool, but because can reuse tool bar, only need to replace the worn blade, and the service life is longer, and long -term cost -effective is higher.

[0027] It should be understood that the embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Claims

1. A reverse tapering roughing cutter comprising a shank (2), a handle (1) and a blade, characterized in that The cutter includes square cutters (5) and round cutters (4), the square cutters (5) are installed in four rows on the cutter holder, the square cutters (5) on adjacent rows form staggered arrangement, and the round cutters (4) are arranged on the outer ends of the cutter holders with the square cutters in two opposite rows.

2. A reverse tapering roughing cutter according to claim 1 wherein The offset angle of the outer end surface of the cutter holder (3) relative to the horizontal center line of the cutter bar (2) is 30 degrees.

3. A reverse tapering roughing cutter according to claim 1 or 2, wherein The cutter holder (3) extends outward along the center line of the cutter bar (2) to form four petal portions in up, down, left and right directions.

4. A reverse tapering roughing cutter according to claim 3 wherein The cutter bar (2) is inverted conical from outside to inside.

5. A reverse tapering roughing cutter according to claim 4 wherein The square cutters (5) and the round cutters (4) are arranged at intervals and are fixed on the cutter holder by cutter screws (6).

6. A reverse tapering roughing cutter according to claim 5 wherein The cutter bar (2) and the handle (1) are integrated.

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