CN207914672U - A special machine clip slotting tool for machining rotor lock slots - Google Patents

Abstract

A special mechanically-clamped slotting tool for machining a rotor fore shaft groove relates to the technical field of machining tools. The utility model provides a slotting tool that the rhombus fore shaft groove that current processing rotor T shape blade root groove adopted be whole high-speed steel cutter, have cutter life weak point, the problem that the cutter is with high costs. The utility model discloses a cutter body comprises the preceding cutter body of making an organic whole and back cutter body, the blade comprises handle of a knife and the tool bit of making an organic whole, processing on the up end of preceding cutter body have with handle of a knife complex square groove, a plurality of tooth grooves are evenly seted up to the one side in square groove, the another side in square groove seted up with holding screw complex screw hole, the cross section of back cutter body is the rectangle, the square inslot of cutter body before the handle of a knife is arranged in, the tooth groove complex dentate body with preceding cutter body is evenly seted up to the one side of handle of a knife, the handle of a knife passes through holding screw and preceding cutter body rigid coupling, the tool bit slope sets up the upper. The utility model is used for processing the rhombus fore shaft groove on the T shape root groove of rotor.

Description

A special machine clip slotting tool for machining rotor lock slots

technical field

The utility model relates to the technical field of mechanical processing cutters, in particular to a special machine clip slotting cutter for processing rotor lock slots.

Background technique

When assembling the high and medium pressure rotor blades in the steam turbine unit, it is necessary to design a diamond-shaped locking groove on the T-shaped blade root groove of the rotor, and use the diamond-shaped locking groove to assemble the blades on the rotor. The slotting knife used in the groove is a whole high-speed steel tool. When the tool is worn out and chipped, it will be scrapped, and the cost of the tool is relatively high.

To sum up, the existing slotting tool used for machining the rhombic lock slot on the T-shaped blade root slot of the rotor is an integral high-speed steel tool, which has the problems of short tool life and high tool cost.

Utility model content

The purpose of this utility model is to solve the problems of short service life of the tool and high cost of the tool because the slotting knife used in the existing processing of the diamond-shaped locking groove on the T-shaped blade root groove of the rotor is an integral high-speed steel tool, and further provides The utility model relates to a special machine clip slotting tool for machining rotor lock slots.

The technical scheme of the utility model is:

A special machine clip slotting knife for machining rotor lock slots, the slotting knife includes a knife body, a blade and a set screw, the knife body is composed of an integrated front knife body and a rear knife body, and the blade is made of an integrated knife body Composed of handle and cutter head, the upper end surface of the front cutter body is processed with a square groove that matches the handle, one side of the square groove is uniformly opened with multiple toothed grooves, and the other side of the square groove is provided with threaded holes that match the set screw , the cross-section of the rear cutter body is rectangular, the handle is placed in the square groove of the front cutter body, one side of the handle is evenly provided with a toothed body that matches the toothed groove of the front cutter body, and the handle is connected to the front cutter body through a set screw The cutter body is fixed, and the cutter head is obliquely arranged on the upper part of the handle.

Further, the included angle between the cutter head and the longitudinal axis of the cutter handle is 35°.

Further, the rake angle of the cutter head is 8°, the main relief angle of the cutter head is 5°, the first auxiliary relief angle of the cutter head is 2°, and the second auxiliary relief angle of the cutter head is 2°.

Further, the blade is a high-speed steel blade.

Further, the length×width of the square groove of the front cutter body=22×12mm.

Further, the cross section of the front cutter body is a rectangle with length×width=50×11.5.

Further, the included angle of the toothed groove of the front cutter body is 90°.

Further, the length×width of the rectangular cross-section of the rear cutter body=50×30mm.

Compared with the prior art, the utility model has the following effects:

1. A special machine clip insertion tool for processing rotor lock slots of the utility model adopts a machine clip blade, and the handle of the tool is fixed on the front cutter body through a set screw, which is convenient for the operator to use and set the knife. When the tool wears and the blade breaks Finally, the operator can easily replace the new blade, reduce the cost of the tool, and improve the service life and processing efficiency of the tool.

2. A special machine clamp for processing the lock slot of the rotor of the present invention is designed for tooth-shaped groove positioning. The handle of the knife is placed in the square groove of the front cutter body, and the tooth-shaped body of the handle is matched with the tooth-shaped groove of the front cutter body. , The positioning is accurate, it is convenient for the operator to use and set the tool, and it meets the processing accuracy requirements of the diamond lock groove.

3. The blade of the utility model, which is specially used for processing the rotor lock slot, is made of high-performance high-speed steel material, which has better impact resistance and effectively improves the service life and processing efficiency of the blade.

Description of drawings

Fig. 1 is a front view of the utility model; Fig. 2 is a side view of Fig. 1; Fig. 3 is a front view of the cutter body; Fig. 4 is a side view of Fig. 3; Fig. 5 is a top view of Fig. 3; Front view; Fig. 7 is a side view of Fig. 6; Fig. 8 is a top view of Fig. 6; Fig. 9 is a sectional view of Fig. 6 at B-B.

Detailed ways

Specific embodiment 1: This embodiment is described in conjunction with Fig. 1 to Fig. 8 , a special machine clamp inserting tool for machining rotor lock slots in this embodiment, the inserting tool includes a cutter body 1, a blade 2 and a set screw 3, Cutter body 1 is made up of front cutter body 1-1 and rear cutter body 1-2 made into one, and blade 2 is made of handle of a knife 2-1 and cutter head 2-2 made into one, and front cutter body 1-1 A square groove 1-1-1 matching with the handle 2-1 is processed on the upper end surface, and a plurality of toothed grooves 1-1-2 are evenly opened on one side of the square groove 1-1-1, and the square groove 1-1-1 The other side of the shank is provided with a threaded hole 1-1-3 that cooperates with the set screw 3, the cross section of the rear cutter body 1-2 is rectangular, and the handle 2-1 is placed in the square groove 1-1 of the front cutter body 1-1. In 1-1, one side of the tool handle 2-1 is evenly provided with a toothed body 2-1-1 that matches the toothed groove 1-1-2 of the front cutter body 1-1, and the tool handle 2-1 passes through the set screw 3 is fixedly connected with the front cutter body 1-1, and the cutter head 2-2 is obliquely arranged on the top of the handle 2-1.

Embodiment 2: This embodiment is described with reference to FIG. 6 . The included angle θ between the cutter head 2 - 2 and the longitudinal axis A-A of the handle 2 - 1 in this embodiment is 35°. Other compositions and connections are the same as in the first embodiment.

Specific embodiment three: this embodiment is described in conjunction with Fig. 7 and Fig. 9, the rake angle α of the cutter head 2-2 of the present embodiment is 8 °, and the main relief angle β of the cutter head 2-2 is 5 °, and the cutter head 2 The first secondary relief angle δ ₁ of -2 is 2°, and the second secondary relief angle δ ₂ of the cutter head 2-2 is 2°. Such setting improves the cutting performance of the tool. Other compositions and connections are the same as those in Embodiment 1 or Embodiment 2.

Specific Embodiment 4: This embodiment is described with reference to FIG. 1 and FIG. 2 . The blade 2 of this embodiment is a high-speed steel blade. In this way, the blade 2 is made of high-performance high-speed steel, which has better impact resistance, and improves the service life and processing efficiency of the tool. Other compositions and connections are the same as those in Embodiment 1, 2 or 3.

Embodiment 5: This embodiment is described with reference to FIG. 5 . The length×width of the square groove 1-1-1 of the front cutter body 1-1 of this embodiment=22×12mm. In this way, the square groove 1-1-1 cooperates with the handle 2-1 for installing the blade 2. Other compositions and connections are the same as those in Embodiment 1, 2, 3 or 4.

Embodiment 6: This embodiment is described with reference to FIG. 3 and FIG. 4 . The cross section of the front cutter body 1 - 1 of this embodiment is a rectangle with length×width=50×11.5. Other compositions and connections are the same as those in Embodiment 1, 2, 3, 4 or 5.

Embodiment 7: This embodiment is described with reference to FIG. 5 . The included angle γ of the tooth groove 1 - 1 - 2 of the front cutter body 1 - 1 of this embodiment is 90°. In this way, the toothed groove 1-1-2 of the front cutter body 1-1 cooperates with the toothed body 2-1-1 of the handle 2-1 to ensure that the front cutter body 1-1 is in close contact with the handle 2-1. The toothed groove structure is used for positioning, and the positioning is accurate. Other compositions and connections are the same as those in Embodiment 1, 2, 3, 4, 5 or 6.

Embodiment 8: This embodiment is described with reference to FIG. 3 and FIG. 4 . The length×width of the rectangular cross-section of the rear cutter body 1-2 in this embodiment is 50×30mm. In this way, the rear cutter body 1-2 is positioned and installed in the positioning hole of the tool holder of the machine tool, so that the cutter body 1 is convenient for positioning and clamping on the tool holder of the machine tool. Other compositions and connections are the same as those in Embodiment 1, 2, 3, 4, 5, 6 or 7.

Ninth specific embodiment: This embodiment is described in conjunction with Fig. 3 and Fig. 4. The front cutter body 1-1 of this embodiment clamps the handle 2-1 and processes the first step 1-1-4 according to the size of the diamond-shaped locking groove. The step surface of the first step 1-1-4 is used to ensure the installation size of the handle 2-1.

Specific Embodiment Ten: This embodiment is described in conjunction with Fig. 6 and Fig. 7, the second step 2-1-2 is processed on the handle 2-1, and the step surface of the second step 2-1-2 is directly It is stuck on the front cutter body 1-1 to ensure the consistency of the size after the blade is replaced, and it is convenient for the operator to install, align and set the cutter.

Claims (8)

1. a kind of processing rotor fore shaft slot special machine presss from both sides slotting tool, it is characterised in that：The slotting tool include cutter hub (1), blade (2) and Holding screw (3), cutter hub (1) are formed by integrated preceding cutter hub (1-1) and rear cutter hub (1-2) is made, and blade (2) is by being made one Handle of a knife (2-1) and cutter head (2-2) constitute, the square groove with handle of a knife (2-1) cooperation is machined on the upper surface of preceding cutter hub (1-1) The one side of (1-1-1), square groove (1-1-1) uniformly open up multiple serrate slots (1-1-2), and the another side of square groove (1-1-1) is opened Equipped with the threaded hole (1-1-3) coordinated with holding screw (3), the cross section of rear cutter hub (1-2) is rectangle, and handle of a knife (2-1) is set Interior, the serrate slot of handle of a knife (2-1) being uniformly provided on one side with preceding cutter hub (1-1) in the square groove (1-1-1) of preceding cutter hub (1-1) The tooth form body (2-1-1) of (1-1-2) cooperation, handle of a knife (2-1) is affixed by holding screw (3) and preceding cutter hub (1-1), cutter head (2- 2) it is inclined at the top of handle of a knife (2-1).

2. a kind of processing rotor fore shaft slot special machine according to claim 1 presss from both sides slotting tool, it is characterised in that：Cutter head (2-2) Angle (θ) between the longitudinal axis (A-A) of handle of a knife (2-1) is 35 °.

3. a kind of processing rotor fore shaft slot special machine according to claim 1 presss from both sides slotting tool, it is characterised in that：Cutter head (2-2) Anterior angle (α) be 8 °, the primary clearance (β) of cutter head (2-2) is 5 °, the first front clearance (δ of cutter head (2-2)₁) it is 2 °, cutter head (2- 2) the second front clearance (δ₂) it is 2 °.

4. a kind of processing rotor fore shaft slot special machine according to claim 1 presss from both sides slotting tool, it is characterised in that：Blade (2) is High speed steel blade.

5. a kind of processing rotor fore shaft slot special machine according to claim 1 presss from both sides slotting tool, it is characterised in that：Preceding cutter hub (1- 1) length × wide=22 × 12mm of square groove (1-1-1).

6. a kind of processing rotor fore shaft slot special machine according to claim 1 presss from both sides slotting tool, it is characterised in that：Preceding cutter hub (1- 1) cross section is long × wide=50 × 11.5 rectangle.

7. a kind of processing rotor fore shaft slot special machine according to claim 1 presss from both sides slotting tool, it is characterised in that：Preceding cutter hub (1- 1) angle (γ) of serrate slot (1-1-2) is 90 °.

8. a kind of processing rotor fore shaft slot special machine according to claim 1 presss from both sides slotting tool, it is characterised in that：Cutter hub (1- afterwards 2) length of rectangular cross section × wide=50 × 30mm.