Shallow hole drill with WC02 insert and diameter less than 15 mm

Abstract

The utility model discloses a shallow hole drill adapted for a WC02 blade and having a diameter less than 15 mm, comprising a shank, a connecting portion and a drill rod, the drill rod being provided with a spiral chip groove, an inner blade and an outer blade being correspondingly fixedly provided in the spiral chip groove at the top of the drill rod, the inner blade and the outer blade being WC02 blades, and the width dimension D1-d1 of the WC02 blade being 4.86 mm. The utility model adjusts a U drill blade of less than 15 mm to a WC02 blade with a smaller IC value, and adjusts the size of the blade installation groove on the U drill guide rod, greatly increasing the drill rod wall thickness L between the two blade installation grooves, improving the impact strength, and extending the service life.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control tools, in particular to a shallow hole drill which is adapted to a WC02 blade and has a diameter less than 15 mm. Background Art

[0002] The traditional shallow hole drill with a diameter of less than 15 mm includes a handle, a connecting part and a drill rod. The drill rod is provided with a spiral groove. The inner blade and the outer blade are fixedly provided in the spiral groove at the top of the drill rod. The inner blade and the outer blade are made of WC03 blades, such as Figure 1 and Figure 2 As shown, D is the distance between the outer diameter of the outer blade and the center point, d is the distance between the inner diameter of the outer blade and the center point, and the width dimension of the blade is Dd. Since the width dimension Dd of WC03 is relatively large, the wall thickness L of the drill rod between the two blade mounting grooves where the two blades are installed is very thin. Under the continuous impact of iron chips during the drilling process, it is very easy to penetrate, resulting in the scrapping of the drill body and a very short service life. Utility Model Content

[0003] In order to solve the above technical problems, the utility model designs a shallow hole drill which is adapted to a WC02 blade and has a diameter less than 15 mm.

[0004] The utility model adopts the following technical solutions:

[0005] A shallow hole drill adapted for a WC02 blade and having a diameter less than 15 mm, comprising a shank, a connecting portion and a drill rod, the drill rod being provided with a spiral chip groove, an inner blade and an outer blade being correspondingly fixedly arranged in the spiral chip groove at the top of the drill rod, the inner blade and the outer blade being WC02 blades, and a width dimension D1-d1 of the WC02 blade being 4.86 mm.

[0006] Preferably, two blade mounting grooves are respectively provided in the spiral chip removal groove at the top of the drill rod corresponding to the inner blade and outer blade mounting positions, and the inner blade and the outer blade are fixedly installed in the two blade mounting grooves by bolts.

[0007] Preferably, water outlet holes are separately opened on both sides of the top of the drill rod corresponding to the installation positions of the inner blade and the outer blade. The two water outlet holes are connected to the main cooling water channel through the branch cooling water channels inside the drill rod, and the main cooling water channel is connected to the cooling water inlet arranged at the end of the shank.

[0008] Preferably, the branch cooling water channel and the main cooling water channel form a Y-shaped cooling water channel.

[0009] Preferably, the cooling water inlet is provided with an internal thread.

[0010] Preferably, the inner blade and the outer blade are arranged in a regular triangle, and cutting edges are respectively arranged on the three corners of the inner blade and the outer blade.

[0011] The beneficial effects of the utility model are as follows: the utility model adjusts the U drill blade below 15 mm to a WC02 blade with a smaller IC value, and adjusts the size of the blade installation groove on the U drill guide rod, which greatly increases the drill rod wall thickness L between the two blade installation grooves, improves the impact strength, and extends the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of a traditional shallow hole drill with a diameter less than 15 mm;

[0013] Figure 2 It is a top view of a traditional shallow hole drill with a diameter of less than 15 mm;

[0014] Figure 3 It is a structural schematic diagram of the utility model;

[0015] Figure 4 It is a top view of the utility model;

[0016] Figure 5 It is a front view of the utility model;

[0017] Figure 6 yes Figure 5 A cross-sectional view in the AA direction;

[0018] In the figure: 1. tool handle, 2. connecting part, 3. drill rod, 4. outer blade, 5. inner blade, 6. spiral chip groove, 7. cooling water inlet, 8. main cooling water channel, 9. branch cooling water channel. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0020] Example: Figure 3-Figure 6 As shown, a shallow hole drill adapted for WC02 blades and having a diameter less than 15 mm comprises a shank 1, a connecting portion 2 and a drill rod 3, wherein the drill rod is provided with a spiral chip groove 6, and an inner blade 5 and an outer blade 4 are correspondingly fixedly arranged in the spiral chip groove 6 at the top of the drill rod 3, wherein the inner blade 5 and the outer blade 4 are WC02 blades, and the width dimension D1-d1 of the WC02 blade is 4.86 mm.

[0021] Two blade installation grooves are respectively provided in the spiral chip removal groove 6 at the top of the drill rod 3 corresponding to the inner blade 5 and the outer blade 4. The inner blade 5 and the outer blade 4 are fixedly installed in the two blade installation grooves by bolts.

[0022] Water outlet holes are separately opened on both sides of the top of the drill rod 3 corresponding to the installation positions of the inner blade 5 and the outer blade 4. The two water outlet holes are connected to the main cooling water channel 8 through the branch cooling water channel 9 inside the drill rod 3. The main cooling water channel 8 is connected to the cooling water inlet 7 set at the end of the handle 1.

[0023] The branch cooling water channel 9 and the main cooling water channel 8 form a Y-shaped cooling water channel. The cooling water inlet 7 is provided with an internal thread.

[0024] The inner blade 5 and the outer blade 4 are arranged in a regular triangle, and cutting edges are arranged on the three corners of the inner blade 5 and the outer blade 4 respectively.

[0025] The utility model adjusts the U drill blade below 15 mm to a WC02 blade with a smaller IC value, and adjusts the size of the blade installation groove on the U drill guide rod, greatly increasing the drill rod wall thickness L between the two blade installation grooves, improving the impact strength, and extending the service life.

[0026] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A shallow hole drill adapted for a WC02 blade and having a diameter of less than 15 mm, comprising a shank (1), a connecting portion (2) and a drill rod (3), wherein the drill rod is provided with a spiral chip groove (6), and an inner blade (5) and an outer blade (4) are fixedly provided in the spiral chip groove (6) at the top of the drill rod (3), wherein: The inner blade (5) and the outer blade (4) are WC02 blades, and the width dimension D1-d1 of the WC02 blade is 4.86 mm.

2. The shallow hole drill with a WC02 insert and a diameter less than 15 mm according to claim 1, characterized in that: Two blade installation grooves are respectively provided in the spiral chip removal groove (6) at the top of the drill rod (3) corresponding to the inner blade (5) and the outer blade (4) installation positions, and the inner blade (5) and the outer blade (4) are fixedly installed in the two blade installation grooves by bolts.

3. The shallow hole drill with a WC02 insert and a diameter less than 15 mm according to claim 1, characterized in that: Water outlet holes are separately provided on both sides of the top of the drill rod (3) corresponding to the installation positions of the inner blade (5) and the outer blade (4), and the two water outlet holes are connected to the main cooling water channel (8) through the branch cooling water channel (9) inside the drill rod (3), and the main cooling water channel (8) is connected to the cooling water inlet (7) provided at the end of the shank (1).

4. The shallow hole drill with a WC02 insert and a diameter less than 15 mm according to claim 3, characterized in that: The branch cooling water channel (9) and the main cooling water channel (8) form a Y-shaped cooling water channel.

5. The shallow hole drill with a WC02 insert and a diameter less than 15 mm according to claim 3, characterized in that: The cooling water inlet (7) is provided with an internal thread.

6. The shallow hole drill with a WC02 insert and a diameter less than 15 mm according to claim 3, characterized in that: The inner blade (5) and the outer blade (4) are arranged in the shape of an equilateral triangle, and cutting edges are respectively arranged at the three corners of the inner blade (5) and the outer blade (4).

Images