CN204449446U - A kind of machining blade is except the milling cutter of wet sump - Google Patents

Abstract

A milling cutter for processing blade dehumidification grooves relates to a milling cutter, in particular to a milling cutter for processing blade dehumidification grooves. The utility model solves the problem that the existing blade dehumidification tank is manually ground by a fitter using a sheet grinding wheel, not only the processing efficiency is low, but also the straightness of the dehumidification tank is not ideal, which affects the dehumidification effect and appearance quality. The utility model includes a cutter bar, a cutter head and a lock nut. The front end of the cutter rod is provided with a screw rod, and a positioning key is arranged on the outer wall of the screw rod. The cutter head is composed of a ring and six blades. The circumferential direction is evenly fixed on the outer wall of the ring, and the inner wall of the ring is provided with a positioning groove that matches the positioning key. The cutter head is set on the screw rod, and the positioning key is inserted into the positioning groove for locking. The locking nut of the cutter head is sleeved on the screw rod. The utility model is used in machining.

Description

Milling cutter for machining blade dehumidification groove

technical field

The utility model relates to a milling cutter, in particular to a milling cutter for processing blade dehumidification grooves, which belongs to the field of mechanical processing.

Background technique

The steam turbine blade with dehumidification groove is a new type of blade. There are 5 to 8 dehumidification grooves designed on the back arc surface of the blade. Turbine efficiency. In the past, the dehumidification tank of the blade was manually ground by a fitter using a thin disc grinding wheel. Not only the processing efficiency was low, but also the straightness of the dehumidification tank was not ideal, which affected the dehumidification effect and appearance quality.

Utility model content

The utility model aims to solve the problem that the existing blade dehumidification tank is manually ground by a fitter using a sheet grinding wheel. Not only is the processing efficiency low, but the straightness of the dehumidification tank is not ideal, which affects the dehumidification effect and appearance quality, and further proposes a method for processing the blade dehumidification tank milling cutter.

The technical scheme that the utility model adopts for solving the above problems is: the utility model comprises a knife rod, a cutter head and a locking nut, the front end of the cutter rod is provided with a screw rod, and the outer wall of the screw rod is provided with a positioning key, and the cutter head is formed by a circular ring. Composed of six blades, the six blades are evenly distributed and fixed on the outer wall of the ring along the circumferential direction of the ring, the inner wall of the ring is provided with a positioning groove that matches the positioning key, and the cutter head is set on the screw rod. The positioning key is inserted in the positioning groove, and the locking nut for locking the cutter head is sleeved on the screw rod.

The beneficial effects of the utility model are: the utility model is actually used, the effect is very good, the processing method is improved, and the manual grinding process is improved to the CNC milling machine using a special milling cutter, which not only improves the processing quality of the dehumidification tank, but also greatly The processing efficiency is improved, and the processing efficiency is more than doubled. The milling cutter adopts an assembly structure type. When the milling cutter is worn out and scrapped, it is only necessary to install a new milling cutter on the tool holder, which avoids the overall scrapping of the cutter and saves tool costs.

Description of drawings

Fig. 1 is the front view of the utility model, Fig. 2 is the front view of the screw rod, Fig. 3 is the top view of Fig. 2, Fig. 4 is the front view of the cutter head, Fig. 5 is the left side view of Fig. 4, Fig. 6 is the utility model Schematic diagram at work.

Detailed ways

Specific Embodiment 1: This embodiment is described in conjunction with FIGS. 1 to 6. A milling cutter for processing blade dehumidification grooves described in this embodiment includes a cutter bar 1, a cutter head 2 and a lock nut 3. The front end of the cutter bar 1 is provided with a Screw rod 1-1 is arranged, and the outer wall of screw rod 1-1 is provided with positioning key 1-2, and cutter head 2 is made up of circular ring 2-1 and six blades 2-2, and six blades 2-2 are formed along circular ring 2. The circumferential direction of -1 is uniformly fixed on the outer wall of the ring 2-1, and the inner wall of the ring 2-1 is provided with a positioning groove 2-3 matched with the positioning key 1-2, and the cutter head 2 is set on the On the screw rod 1-1, the positioning key 1-2 is inserted in the positioning groove 2-3, and the lock nut 3 for locking the cutter head 2 is set on the screw rod 1-1.

Specific embodiment two: this embodiment is described in conjunction with Fig. 4 and Fig. 5, the circumferential rake angle of the blade 2-2 of a milling cutter for processing the blade dehumidification groove described in this embodiment is 10°, and the circumference of the blade 2-2 The tooth relief angle is 12°, the end face tooth rake angle of the blade 2-2 is 8°, and the end face tooth relief angle of the blade 2-2 is 5°. Other components and connections are the same as those in the first embodiment.

Specific Embodiment 3: This embodiment is described with reference to FIGS. 1 to 3 . A milling cutter for processing blade dehumidification tanks described in this embodiment is provided with a mounting screw hole 1-3 in the middle of the end face of the rear end of the cutter bar 1 . Other components and connections are the same as those in the first embodiment.

Claims (3)

1. a machining blade is except the milling cutter of wet sump, it is characterized in that: the milling cutter that described a kind of machining blade removes wet sump comprises knife bar (1), cutter head (2) and locking nut (3), the front end of knife bar (1) is provided with screw rod (1-1), the lateral wall of screw rod (1-1) is provided with positioning key (1-2), cutter head (2) is made up of annulus (2-1) and six blades (2-2), six blades (2-2) are along on the uniform lateral wall being fixed on annulus (2-1) of circumferencial direction of annulus (2-1), the madial wall of annulus (2-1) is provided with the locating slot (2-3) matched with positioning key (1-2), cutter head (2) is sleeved on screw rod (1-1), positioning key (1-2) is inserted in locating slot (2-3), locking nut (3) for locking cutter head (2) is sleeved on screw rod (1-1).

2. a kind of machining blade removes the milling cutter of wet sump according to claim 1, it is characterized in that: the circumferential teeth anterior angle of blade (2-2) is 10 °, the circumferential teeth relief angle of blade (2-2) is 12 °, the end-tooth anterior angle of blade (2-2) is 8 °, and the end-tooth relief angle of blade (2-2) is 5 °.

3. a kind of machining blade, except the milling cutter of wet sump, is characterized in that: be provided with installation screw (1-3) in the middle part of the end face of knife bar (1) rear end according to claim 1.