CN108856819A - A kind of indexable steel plate drill bit - Google Patents

Abstract

An indexable steel plate drill bit, comprising a handle, a cutter body and several blades, characterized in that: the cutter body and the handle are integrated; the cutter body is provided with a number of rows equal to the number of blades chip groove and blade groove; the blade groove is divided into three types: outer, middle, and inner according to the clockwise direction, and arranged in a staggered manner; the blade is divided into three types: outer, middle, and inner; The size and shape are matched, and there is a threaded hole at the bottom of the blade groove. The direction of the threaded hole of the outer blade is the same as the radial direction of the cutter body, and the direction of the threaded holes of the middle blade and the inner blade is the same as the axial direction of the cutter body.

Description

An indexable steel plate drill bit

Technical field:

The present application relates to a steel plate drill bit, in particular to an indexable steel plate drill bit.

technical background:

The steel plate drills currently on the market are mainly of the welded blade type, and the blade is connected to the cutter body by means of brazing or the like. During welding, if the temperature is not properly controlled, it will damage the structure of the blade and the strength of the blade body. In addition, due to the low strength of the metal solder, the weld seam between the blade and the cutter body is not strong enough, and the blade is likely to fall during use. Once the blade is dropped or chipped, the drill bit can no longer be used. Most users will discard the drill bit directly, but the cutter body is basically intact, resulting in a large waste of resources.

To sum up, the structure of the existing welded steel plate drill is unreasonable, and there are problems such as unstable service life and low tool utilization rate.

Invention content:

The application mainly solves the problems of insufficient strength of the welded steel plate drill bit and low utilization rate of the cutter body, and provides an indexable steel plate drill bit with a reasonable structure and high drill bit utilization rate.

The technical solution adopted by the application to solve the above technical problems is:

An indexable steel plate drill bit, including a handle, a cutter body and several blades, characterized in that: the cutter body and the handle are integrated; the cutter body is provided with a number of rows equal to the number of blades chip groove and blade groove; the blade groove is divided into three types: outer, middle, and inner according to the clockwise direction, and arranged in a staggered manner; the blade is divided into three types: outer, middle, and inner; The size and shape are matched, and there is a threaded hole at the bottom of the blade groove. The direction of the threaded hole of the outer blade is the same as the radial direction of the cutter body, and the direction of the threaded holes of the middle blade and the inner blade is the same as the axial direction of the cutter body.

Preferably, the blade material described in this application is made of cemented carbide.

Preferably, the number of blades described in this application is 3-15.

As a preference, the flute helix angle of the present application is 10°-20°.

Preferably, the number of flutes described in this application is the same as the number of blades.

Compared with the existing welded steel plate drill bit, the present application has the following advantages:

(1) The blade and the cutter body are fixed by screws, the connection between the blade and the cutter body is stronger, and the damage to the blade and the cutter body caused by improper temperature control during welding is avoided.

(2) Depending on the material of the workpiece to be processed, blades of different materials and geometric angles can be selected, which broadens the use of the product.

(3) It saves the time of tool setting and adjustment after changing the blade, and greatly improves the work efficiency.

Description of drawings:

Fig. 1 is a schematic structural view of an indexable steel plate drill in an embodiment of the present invention.

Fig. 2 is a left side view of Fig. 1 .

Fig. 3 is a three-dimensional schematic diagram of an embodiment of the present invention.

Detailed ways:

The present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are explanations of the present invention, but the present invention is not limited to the following examples.

Referring to Fig. 1 to Fig. 3, the present embodiment comprises a tool holder 1, a chip flute 2, a cutter body 3, a blade 4, a blade 5, a blade 6 and screws with the same number as the blade.

In this embodiment, the cutter body 3 and the handle 1 are integrated, and chip removal grooves equal to the number of blades are arranged on the cutter body, and the helix angle of the chip removal grooves is 18°. Blade 4 is radially fixed to the cutter body by screws, and blade 5 and blade 6 are axially fixed to the cutter body by screws. Blade 4, blade 5, and blade 6 are staggered and arranged clockwise.

In the specific embodiments described in this specification, the shapes and names of parts and components may be different. The content described in this specification is only an illustration of the present invention. Simple changes all include within the protection scope of the present invention.

Claims (5)

1. a kind of indexable steel plate drill bit, including knife handle, cutter hub and several blades, it is characterised in that：The cutter hub and knife Handle is an entirety；The cutter hub is equipped with and the equal number of several chip spaces of blade and insert groove；The insert groove is by suitable Hour hands be divided into it is outer, in, it is three kinds interior and staggered；The blade be divided into it is outer, in, it is three kinds interior, size shape with it is corresponding The size shape of insert groove matches, and the blade trench bottom respectively has a threaded hole, outer blade threaded hole direction and cutter hub diameter Identical to direction, middle blade and inner blade threaded hole direction are identical as cutter hub axial direction.

2. a kind of indexable steel plate drill bit according to claim 1, it is characterised in that：The blade material uses hard Alloy material.

3. a kind of indexable steel plate drill bit according to claim 1, it is characterised in that：The knife number is 3-15 It is a.

4. a kind of indexable steel plate drill bit according to claim 1, it is characterised in that：10 ° of the chip space helical angle ~20 °.

5. a kind of indexable steel plate drill bit described in one of -4 according to claim 1, it is characterised in that：The chip removal slot number It is identical as knife number.