CN204657574U - A kind of shovel bores - Google Patents

Abstract

The utility model relates to a shovel drill, which belongs to a hardware processing tool. At present, there is no spade drill with a reasonable structural design that can still cut smoothly when the equipment power is insufficient or the drilling sensitivity is insufficient. The utility model comprises a handle, a blade and a spade drill blade. One end of the handle and one end of the blade are fixed, the other end of the blade is provided with a blade groove, and the bottom of the blade groove is provided with a positioning pin. The spade drill blade is fixed in the blade groove, the positioning pin cooperates with the spade drill blade, and the edge is provided with a chip removal groove, and the blade groove is connected with the chip discharge groove, and the feature is that it also includes guide bars and The chamfering blade is provided with a guide strip groove and a chamfering blade groove, the guide strip is fixed on the guide strip groove, and the chamfering blade is fixed on the chamfering blade groove. The utility model has a reasonable structural design, and can still cut smoothly and sharply when used under the condition of insufficient equipment power or insufficient drilling sensitivity.

Description

a spade drill

technical field

The utility model relates to a shovel drill, which belongs to a hardware processing tool and can complete drilling with chamfers at one time.

Background technique

In the existing market, the discarded tool spade drill that replaces the ordinary twist drill includes a tool holder and a blade. Among them, the blade adopts a standard end tooth geometry, the cutting is relatively stable, and the cutting resistance is medium. This type of blade has sufficient equipment power and drilling sensitivity. The cutting effect is better when used under normal circumstances, but when the equipment power is insufficient or the drilling sensitivity is insufficient, the blade is prone to cutting instability. In addition, when ordinary twist drills are used to drill holes in the prior art, it is often necessary to replace the drill bit for chamfering the hole. Usually, a countersink is used for chamfering. When machining a hole with a chamfer, there will be frequent tool replacement , greatly reducing work efficiency. At present, there is also an operation method of chamfering the hole after the drilling is completed, which overcomes the defects caused by frequent tool replacement, but it still needs two steps to complete the hole with chamfering, and the work efficiency is still relatively low. Low, and it is difficult to effectively ensure the concentricity of chamfering.

At present, there is no reasonable structural design, which can still cut smoothly and sharply when used in the case of insufficient equipment power or insufficient drilling sensitivity, and can complete drilling with chamfering at one time, and chamfering Spade drill with good concentricity.

Utility model content

The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art, and provide a structure with a reasonable design, which can still cut smoothly and sharply when used in the case of insufficient equipment power or insufficient drilling sensitivity. High, able to complete drilling with chamfering at one time, and spade drilling with good concentricity when chamfering.

The technical solution adopted by the utility model to solve the above problems is: the spade drill includes a handle, a blade and a spade drill blade, one end of the handle and one end of the blade are fixed, and the other end of the blade is provided with a blade groove, the bottom of the blade groove is provided with a positioning pin, the spade drill blade is fixed in the blade groove, the positioning pin is matched with the spade drill blade, and the edge is provided with a chip removal groove, and the blade groove and row The chip flutes are connected, and its structural feature is that it also includes a guide strip and a chamfering blade, the blade is provided with a guide strip groove and a chamfering blade groove, the guide strip is fixed on the guide strip groove, and the chamfering blade is fixed On the chamfered insert pocket.

As a preference, the spade drill blade of the present invention includes a blade body, the blade body is provided with a fixing hole, the bottom of the blade body is provided with a positioning groove, the top of the blade body is provided with a cutting position, and the cutting position A chip breaker and a chip divider are provided, and the drill tip of the insert body is provided with a grinding chisel edge, and a notch is arranged on the grinding chisel edge.

As a preference, the number of chip removal grooves in the present invention is two, and the two sides of the blade groove are respectively connected with one chip removal groove, and the chip removal grooves are straight groove structure or spiral groove structure.

As a preference, the number of guide bar grooves in the utility model is two, and a guide bar is fixed on each guide bar groove; the number of the chamfering blade grooves is two, and each chamfering blade groove has two Fixed with a chamfering blade.

As a preference, the guide bar of the utility model is fixed on the guide bar groove by screws, and the chamfering blade is fixed on the chamfering blade groove by screws; the guide bar is a rectangular structure, and the chamfering blade is a square structure , a rectangular structure and a rhombus structure.

Preferably, the chamfering blade groove, the guide bar groove and the blade groove of the utility model are sequentially arranged along the direction from one end of the blade to the other end.

As a preference, the grinding chisel edge provided with the notch in the utility model has a W-shaped structure.

As a preference, both sides of the blade body of the present invention are provided with margins, and the cutting positions on both sides of the blade body are provided with an outer circular back angle or an outer circular relief angle.

Preferably, the number of the fixing holes in the present invention is two, and the axes of the fixing holes are perpendicular to the blade body.

As a preference, the shape of the positioning groove of the present invention is a rectangular structure, and the included angle of the drill tip of the blade body is 90-150 degrees.

Compared with the prior art, the utility model has the following advantages and effects: the structure is simple, the design is reasonable, and the chamfering is completed in one clamping. The blade is provided with a guide strip groove and a chamfering blade groove, the guide strip is fixed on the guide strip groove, and the chamfering blade is fixed on the chamfering blade groove, so that the spade drill shank has the chamfering function, and the concentricity during chamfering Well, it is beneficial to improve production efficiency and reduce labor intensity.

The axis of the fixing hole in the spade drill insert is perpendicular to the insert body, which can be better fixed; the edge of the drill tip has a ground chisel edge, which can reduce the axial force and torque; the drill tip at the cutting position of the insert has chip breakers The groove can increase the service life of the tool and reduce the axial force and torque; the outer circle of the blade body is provided with an outer circle back angle or an outer circle back angle, which is used for cleaning the outer circle; the front angle of the blade body has a Chip breaker for more effective chip breaking.

Description of drawings

Fig. 1 is a front structural schematic diagram of a spade drill in an embodiment of the utility model.

FIG. 2 is a schematic top view of the structure of FIG. 1 .

Fig. 3 is a left view structural diagram of Fig. 1 .

FIG. 4 is a schematic perspective view of the three-dimensional structure of FIG. 1 .

Fig. 5 is a schematic diagram of the structure of Fig. 2 with the spade drill blade removed.

Fig. 6 is a front structural schematic diagram of a spade drill blade in an embodiment of the present invention.

Fig. 7 is a left view structural diagram of Fig. 6 .

FIG. 8 is a schematic top view of the structure of FIG. 6 .

Fig. 9 is a schematic diagram of the three-dimensional structure of the spade drill blade in the embodiment of the present invention.

Fig. 10 is a three-dimensional structural schematic diagram of another viewing angle of the spade drill blade in the embodiment of the present invention.

Fig. 11 is a perspective view of the three-dimensional structure of the spade drill blade in the embodiment of the present invention.

FIG. 12 is an enlarged schematic view of the structure at A in FIG. 10 .

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the utility model and the utility model is not limited to the following examples.

Example.

1 to 12, the spade drill in this embodiment includes a handle 1, a blade 2, a guide bar 3, a chamfering blade 4 and a spade drill blade 5, wherein one end of the handle 1 and one end of the blade 2 Fixed, the other end of the blade portion 2 is provided with a blade slot 21, and the bottom of the blade slot 21 is provided with a positioning pin 22. The spade drill blade 5 is fixed in the blade groove 21, and the positioning pin 22 cooperates with the spade drill blade 5.

The cutting edge 2 in this embodiment is provided with a chip removal groove 23 , and the insert groove 21 is connected to the chip removal groove 23 . Usually, there are two chip removal grooves 23 , and two sides of the insert groove 21 are respectively connected with one chip removal groove 23 . The flute 23 may be a straight groove structure or a spiral groove structure.

The blade portion 2 in this embodiment is provided with a guide strip groove and a chamfering blade groove, the guide strip 3 is fixed on the guide strip groove, and the chamfering blade 4 is fixed on the chamfering blade groove. Usually, the number of guide bar grooves is two, and a guide bar 3 is fixed on each guide bar groove; the number of chamfering blade grooves is two, and each chamfering blade groove is fixed with a chamfer Blade 4.

The chamfering blade groove, the guide bar groove and the blade groove 21 in the present embodiment are arranged sequentially along the direction from one end of the blade portion 2 to the other end of the blade portion 2; the blade portion 2 is a stepped structure, and the blade portion 2 is composed of The front section 24 of the blade, the transition section 25 of the blade, the main body section 26 of the blade and the rear section 27 of the blade, the front section 24 of the blade, the transition section 25 of the blade, the main body section 26 of the blade and the rear section 27 of the blade along the The direction from the other end of the blade to one end of the blade 2 is arranged in sequence, the blade front section 24, the blade transition section 25, the blade main body section 26 and the blade rear section 27 are connected successively, and the diameter of the blade front section 24 is smaller than the blade main body section 26, the diameter of the blade transition section 25 gradually increases along the direction from the blade front section 24 to the blade body section 26, and the blade rear section 27 is connected to the handle 1.

Normally, the guide bar 3 in the utility model is a rectangular structure, and the chamfering blade 4 is a kind of in a square structure, a rectangular structure and a diamond structure; the guide bar 3 is fixed on the guide bar groove by screws, and the chamfering blade 4 It is fixed on the chamfered insert groove by screws.

The spade drill blade 5 in this embodiment includes a blade body 51 , and the blade body 51 is provided with a fixing hole 53 , the number of the fixing holes 53 is two, and the axis of the fixing hole 53 is perpendicular to the blade body 51 . The bottom of the blade body 51 is provided with a positioning groove 52, and the shape of the positioning groove 52 is a rectangular structure. The top of the insert body 51 is provided with a cutting position 54 , and the cutting position 54 is provided with a chip breaking groove 55 and a chip dividing groove 56 . In this embodiment, the drill tip of the insert body 51 is provided with a grinding chisel edge 57, and the grinding chisel edge 57 is provided with a notch 58. The notch 58 is usually composed of an arc segment x and a straight line segment y, and not only has a chip breaking function, It can also effectively reduce resistance.

Normally, both sides of the blade body 51 of the present utility model are provided with margins 59, and the included angle of the drill point of the blade body 51 is 90-150 degrees, and the cutting positions on both sides of the blade body 51 are provided with outer circular backs. Corner 50 or bull relief corner, bull relief corner 50 is located at the top of land 59 . The grinding chisel edge 57 provided with the notch 58 is usually a W-shaped structure, that is, a W-shaped tooth gap, thereby forming a W-shaped grinding drill point structure. The cutting position has a W-shaped tooth gap and a cutter head shape with an outer back angle, which can make the tooling range wider.

The spade drill blade 5 in this embodiment is fixed in the blade groove 21 of the blade portion 2 by screws, and the positioning pin 22 is located in the positioning groove 52 of the spade drill blade 5, and the positioning pin 22 positions the radial position of the spade drill blade 5 .

In addition, it should be noted that the specific embodiments described in this specification may be different in parts, shapes and names of parts, and the above content described in this specification is only an illustration of the structure of the present invention. All equivalent changes or simple changes based on the structure, features and principles described in the utility model patent concept are included in the protection scope of the utility model patent. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the definition defined in the claims scope, all should belong to the protection scope of the present utility model.

Claims (10)

1. A spade drill, comprising a handle, a blade and a spade drill blade, one end of the handle and one end of the blade are fixed, the other end of the blade is provided with a blade groove, and the bottom of the blade groove is provided with There is a positioning pin, the spade drill blade is fixed in the blade groove, the positioning pin cooperates with the spade drill blade, the blade is provided with a chip removal groove, and the blade groove is connected with the chip removal groove, and it is characterized in that: It includes a guide strip and a chamfering blade, the blade is provided with a guide strip groove and a chamfering blade groove, the guide strip is fixed on the guide strip groove, and the chamfering blade is fixed on the chamfering blade groove. 2. The spade drill according to claim 1, characterized in that: the spade drill blade comprises a blade body, a fixing hole is arranged in the blade body, a positioning groove is provided at the bottom of the blade body, and the blade body The top is provided with a cutting position, and the cutting position is provided with a chip breaker and a chip distributor, and the drill tip of the insert body is provided with a grinding chisel edge, and the grinding chisel edge is provided with a notch. 3. The spade drill according to claim 1 or 2, characterized in that: the number of the chip flutes is two, the two sides of the insert flute are respectively connected with a chip flute, and the chip flutes are Straight groove structure or spiral groove structure. 4. The spade drill according to claim 1 or 2, characterized in that: the number of the guide bar grooves is two, each guide bar groove is fixed with a guide bar; the number of the chamfering blade grooves There are two, and a chamfering blade is fixed on each chamfering blade groove. 5. The spade drill according to claim 1 or 2, characterized in that: the guide bar is fixed on the guide bar groove by screws, and the chamfering blade is fixed on the chamfering blade groove by screws; the guide bar It is a rectangular structure, and the chamfering blade is one of a square structure, a rectangular structure and a rhombus structure. 6. The spade drill according to claim 1 or 2, characterized in that the chamfered insert groove, the guide strip groove and the insert groove are arranged in sequence along the direction from one end of the cutting edge to the other end. 7. The spade drill according to claim 2, characterized in that the grinding chisel edge provided with the notch is a W-shaped structure. 8. The spade drill according to claim 2, characterized in that: both sides of the blade body are provided with margins, and the cutting positions on both sides of the blade body are provided with an outer back angle or an outer back angle . 9. The spade drill according to claim 2, characterized in that: there are two fixing holes, and the axes of the fixing holes are perpendicular to the blade body. 10. The spade drill according to claim 2, characterized in that: the shape of the positioning groove is a rectangular structure, and the included angle of the drill tip of the blade body is 90-150 degrees.