CN218532941U - Drilling and reaming combined tool - Google Patents

Abstract

The utility model relates to a drilling and reaming combined tool, including the cutting edge section, the space-avoiding section that is connected with the cutting edge section and the centre gripping handle section that links to each other with the space-avoiding section, set up three main chip groove that is helical structure in the cutting edge section, it is adjacent just be equipped with the cutting edge in the cutting edge section between the main chip groove, the cutting edge is helical structure and sets up with helical structure's main chip groove is synchronous, the cutting head of cutting edge openly is equipped with the drill chip sword, the cutting head top of cutting edge is equipped with first reamer sword, first reamer sword is connected with drill chip sword is adjacent and they are located main chip groove department, follows helical structure set up the vice chip groove with cutting edge synchronous structure on the cutting edge, the cutting head top of cutting edge is equipped with second reamer sword, second reamer sword is located vice chip groove department, first reamer sword and second reamer sword wait to arrange such as height. The utility model discloses can improve work efficiency.

Description

Drilling and reaming combined tool

Technical Field

The utility model relates to a bore hinge gang tool.

Background

Through retrieval, the patent: a drilling and reaming composite cutter (201710265335. X) comprises a shank and a cutting part, wherein the cutting part comprises a main cutting edge and an auxiliary cutting edge, the auxiliary cutting edge comprises two groups of blade groups, each group of blade group comprises a main blade and at least one auxiliary blade which are spirally arranged, each auxiliary blade is sequentially arranged on one side of the main blade, the two groups of blade groups are centrosymmetric relative to the axis of the shank, two main chip discharge grooves are formed between the main blade in one group of blade groups and the last auxiliary blade in the other group of blade groups, auxiliary chip discharge grooves are formed between the main blade and the first auxiliary blade and between the auxiliary blades in each group of blade groups, the main blade is sharp, the auxiliary blades are cylindrical, the outer diameter of the main blade is larger than the outer diameter of each auxiliary blade, and the axial length of the main blade is larger than that of each auxiliary blade. The invention integrates drilling, reaming and cutting into a whole, and has the advantages of simplified processing technique and good surface processing quality.

However, in new energy automobile parts, engineering machinery parts, medical parts and other mechanical parts, holes with the aperture tolerance H7 and the surface roughness ra1.6 widely exist in large numbers, and the technology and the cutter commonly adopted by technicians for such holes at present are as follows: the drilling of the pre-hole by using the 2-blade drill bit is firstly completed by using the reamer to ream the hole, and the following problems exist in the practical use of the conventional process and the cutter:

1. the 2-blade structure of the drill bit in the front way causes the defects of comprehensive accuracy, straightness, roundness and cylindricity of the processed pre-hole, namely the pre-hole has certain deflection; the precision, particularly the straightness, of the front pre-hole greatly influences the use effect and the service life of the rear reamer.

2. The deviation and the non-alignment of the pre-hole position processed by the front drill bit and the post reamer hole position are caused by the influence of the irregularity of the repeated positioning precision of the machine tool.

In conclusion, the situation that the hole diameter size is out of tolerance, the hole wall has tool advancing and retreating grains, the surface quality is poor and the service life of the reamer is short is caused.

At present, current reamer receives self structural limitation, axial front end sets up one section non-final aperture (bore hole footpath promptly), the rear end sets up to final aperture (reamed hole footpath), realize through axial and radial drop and bore gluey processing in proper order, when processing the blind hole, one section non-final aperture (bore hole footpath) can remain in the hole bottom, it shows not conform to the processing requirement in hole (see fig. 1), in addition because receive the influence of hole footpath length in advance, the cutter is adding man-hour, the cutting edge on the reamed hole footpath of rear end can not get into downthehole self-supporting effect fast, lead to this type reamer use occasion and result of use to be restricted.

In view of the above-mentioned drawbacks, the present designer actively makes research and innovation to create a new type of drilling and reaming composite tool, so that the composite tool has more industrial utility value.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing a drilling and reaming combined tool.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a drilling and reaming composite tool comprises a cutting edge section, a clearance section and a clamping handle section, wherein the clearance section is connected with the cutting edge section, the clamping handle section is connected with the clearance section, three main chip grooves in a spiral structure are formed in the cutting edge section, cutting edges are arranged between the adjacent main chip grooves and on the cutting edge section, the cutting edges are in a spiral structure and are synchronously arranged with the main chip grooves in the spiral structure, a cutting head edge is arranged on the front face of each cutting edge, the radial negative front angle of each cutting head edge is 0-20 degrees, the positive groove front angle of each cutting head edge is 0-10 degrees, a first chip reaming edge is arranged above the cutting head of each cutting edge, the first chip reaming edges are adjacent to the cutting head edges and are located at the main chip grooves, an auxiliary chip groove in a structure synchronous with the cutting edges is formed on the back of the cutting edge in the spiral structure, a second chip reaming edge is arranged above the cutting head of each cutting edge, the second chip reaming edge is located at the auxiliary chip groove, and the first chip reaming edges and the second chip reaming edges are arranged at the same height.

Preferably, the drilling and reaming composite tool has a radial negative rake angle of 13 ° and a positive flute rake angle of 9 °.

Preferably, the main chip groove and the auxiliary chip groove are both arc-shaped structures.

Preferably, the depth of the main chip groove of the drilling and reaming composite cutter is 30% -40% of the diameter of the opening of the cutter.

Preferably, the depth of the auxiliary chip discharge groove is 5% -20% of the diameter of the opening of the cutter.

Preferably, the drilling and reaming composite tool is characterized in that the front end of the main chip groove is provided with a chip groove with an arc structure, the chip cutting edge is provided with a chip breaking inner edge, and the chip breaking inner edge is arranged on one side of the chip groove.

Borrow by above-mentioned scheme, the utility model discloses at least, have following advantage:

1. the utility model discloses to bore and hinge two processes and corresponding cutter unite two into one, bore the one-time completion of hinge, avoid the hole site deviation that both sides processing caused, reduced the machine tool required precision, improved machining efficiency simultaneously, reduce the cutter configuration, reduce the cutter cost.

2. The utility model discloses a hinge bits sword such as 6 height improves the pore wall smooth finish, and arc structure chip groove improves chip removal efficiency, and difficult stifled bits reduce the cutting simultaneously and snipe power, make the cutting light and fast, steady, improve the processing quality.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic view of a conventional tool for machining a product;

fig. 2 is a schematic structural diagram of the present invention;

fig. 3 is a front view of the present invention;

FIG. 4 is a partial view of a cutting edge of the present invention;

fig. 5 is another partial view of the cutting edge of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

In the description of the present application, it should be noted that the terms "vertical", "horizontal", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when in use, and are used only for convenience in describing the present application and for simplification of description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or vertical, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Examples

As shown in fig. 2 to 5, a drilling and reaming composite tool includes a cutting edge section 1, a clearance section 2 connected to the cutting edge section 1, and a clamping shank section connected to the clearance section 2, three primary flutes 3 in a spiral structure are formed on the cutting edge section 1, a cutting edge 4 is formed between adjacent primary flutes 3 and on the cutting edge section 1, the cutting edge 4 is in a spiral structure and is synchronously disposed with the primary flutes 3 in the spiral structure, a cutting head front surface of the cutting edge 4 is provided with a cutting chip edge 41, a radial negative rake angle of the cutting chip edge 41 is 0 ° to 20 °, a positive flute rake angle of the cutting chip edge 41 is 0 ° to 10 °, a first reaming chip edge 42 is formed above the cutting head of the cutting edge 4, the first reaming chip edge 42 is connected to the cutting chip edge 41 adjacently and is located at the primary flute 3, a secondary flute 43 having a structure synchronous with the cutting edge is formed along the upper surface of the cutting edge 4 in the spiral structure, a second reaming chip 44 is formed above the cutting edge 4, the secondary flute 43 is located at the secondary reaming chip 44, and the secondary flute 44 and the secondary reaming chip is arranged at the secondary flute 44.

In the present invention, the radial negative rake angle of the cutting edge 41 is 13 ° and the positive flute rake angle thereof is 9 °.

The utility model discloses in main chip groove 3 is the arc structure, wherein vice chip groove 43 is the arc structure, reduces the cutting resistance, makes the cutting light and fast, steady, improves chip removal efficiency, and difficult stifled bits reduce the cutting simultaneously and snipe the power, makes the cutting light and fast, steady, improves the processing quality.

The utility model discloses a cutter is applicable to 4mm to the diameter 32mm trompil.

The utility model discloses in the degree of depth of main chip groove is 30% ~ 40% of cutter trompil diameter, and the degree of depth of vice chip groove is 5% ~ 20% of cutter trompil diameter. Meanwhile, the deeper the diameter of the opening is, the deeper the depth of the corresponding chip removal groove is, and the better the corresponding chip removal capacity is.

The utility model discloses in the chip groove 45 of circular arc structure is seted up to main chip groove 3's front end, be equipped with in the chip breaking 46 on the drill chip sword 41, one side setting that blade 46 is located chip groove 45 in the chip breaking can cut off the sweeps and carry out the chip removal through chip groove 45 through blade 46 in the chip breaking and handle, and the improvement adds the chip removal performance man-hour, and the process velocity that can make the compound cutter that drills and reams is 1.5 times of ordinary cutter, has effectively improved work efficiency.

The back face of the cutting blade is provided with an inner cooling oil hole 5, and the inner cooling oil hole 5 penetrates through the cutting part. When cutting, the cutting edge section 1 contacts with a workpiece firstly to perform normal drilling, and because the rear cutter face of the cutting edge section 1 is provided with the internal cooling oil hole 5, the heat generated by cutting can be greatly reduced, the cutting edge section 1 is effectively protected, the abrasion of the cutting edge section is reduced, and the smooth discharge of scrap iron is facilitated.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (6)

1. The utility model provides a compound cutting tool drills and reams, includes the cutting edge section, keeps away the sky section and the centre gripping handle section that links to each other with the sky section that is connected with the cutting edge section, its characterized in that: the cutting edge section is provided with three main chip grooves which are of a spiral structure, cutting edges are arranged between the adjacent main chip grooves and on the cutting edge section, the cutting edges are of a spiral structure and are arranged synchronously with the main chip grooves of the spiral structure, the cutting head front faces of the cutting edges are provided with cutting chip edges, the radial negative front angles of the cutting chip edges are 0-20 degrees, the positive groove front angles of the cutting chip edges are 0-10 degrees, first reaming chip edges are arranged above the cutting head of the cutting edges, the first reaming chip edges are adjacently connected with the cutting chip edges and are located at the main chip grooves, auxiliary chip grooves which are of a synchronous structure with the cutting edges are arranged on the back of the cutting edges along the spiral structure, second reaming chip edges are arranged above the cutting head of the cutting edges, the second reaming chip edges are located at the auxiliary chip grooves, and the first reaming chip edges and the second reaming chip edges are arranged at equal heights.

2. A drilling and reaming composite tool according to claim 1, characterized in that: the cutting edge has a negative radial rake angle of 13 ° and a positive flute rake angle of 9 °.

3. The drill-reamer composite tool of claim 1, wherein: the main chip groove and the auxiliary chip groove are both arc-shaped structures.

4. A drilling and reaming composite tool according to claim 1, characterized in that: the depth of the main chip groove is 30% -40% of the diameter of the opening of the cutter.

5. A drilling and reaming composite tool according to claim 1, characterized in that: the depth of the auxiliary chip groove is 5% -20% of the diameter of the opening of the cutter.

6. A drilling and reaming composite tool according to claim 1, characterized in that: the front end of the main chip groove is provided with a chip groove with an arc structure, the chip cutting edge is provided with a chip breaking inner edge, and the chip breaking inner edge is arranged on one side of the chip groove.

Images