CN104551248A - Single blade chip-breaking lengthened reamer - Google Patents

Abstract

The invention provides a single-edged chip-breaking elongated reamer, which comprises: a cutter body, a cutter head formed at one end of the cutter body, and a handle formed at the other end of the cutter body; the cutter head has a first cutting edge and a second blade, the second blade is formed between the first blade and the cutter body, the first blade is formed at the end of the cutter head, the cutter head has a rake face, the front A chip breaker is provided on the cutter face; the cutter body forms the guide part of the reamer; the handle forms the installation end of the reamer. The invented single-edged chip-breaking elongated reamer is easy to use and flexible to operate, and has a completely independent chip-holding space. The combination of reaming and extrusion not only makes the cutting process more stable, but also can break chips very well, improving the machining accuracy and rigidity.

Description

Single edge chip breaking extended reamer

technical field

The invention relates to the technical field of cutters, in particular to a single-edged chip-breaking elongated reamer.

Background technique

At present, most of the existing external carbide reamers are of multi-blade structure, but the reamers of this type of structure are not suitable for high-speed reaming, which affects the productivity.

As shown in Figures 1 and 2, the multi-edged reamer, because the pre-drilled hole and the tool are not concentric, the tool axis will inevitably deviate from the spindle axis during cutting. Therefore, its radial deviation will also change with the rotation of the tool, and the hole at the hinge is often eccentric, resulting in failure to meet the product process requirements. In addition, for the existing few single-edged reamers, although the above-mentioned technical problems have been improved to a certain extent, for the processing of thin-walled and deep-hole parts with blind holes, the holes processed by the above-mentioned single-edged reamers are still There are problems such as non-stop chipping, chip entanglement, and severe scratches on the hole wall.

Therefore, in order to solve the above problems, it is necessary to propose further solutions.

Contents of the invention

The object of the present invention is to provide a single-edged chip-breaking elongated reamer to overcome the deficiencies in the prior art.

In order to achieve the above object, the present invention provides a single-edged chip-breaking elongated reamer, which includes: a cutter body, a cutter head formed at one end of the cutter body, and a handle formed at the other end of the cutter body;

The cutter head has a first blade and a second blade, the second blade is formed between the first blade and the cutter body, the first blade is formed at the end of the cutter head, and the cutter head It has a rake face, and a chip breaker is opened on the rake face;

the cutter body forms a guide portion of the reamer;

The shank forms the mounting end of the reamer.

As an improvement of the single-edged chip-breaking elongated reamer of the present invention, the length of the first cutting edge is 1 mm to 3 mm, and the bevel angle of the second cutting edge is 3° to 15°.

As an improvement of the single-edged chip-breaking elongated reamer of the present invention, the length of the second cutting edge is 0.5mm-2mm, and the entering angle of the first cutting edge is 25°-45°.

As an improvement of the single-edged chip-breaking elongated reamer of the present invention, the cutter body is further provided with a chip-containing groove, and one end of the chip-containing groove communicates with the chip-breaking groove on the rake face.

As an improvement of the single-edged chip breaking elongated reamer of the present invention, the chip flute is extended along the length direction of the cutter body.

As an improvement of the extended single-edged chip breaking reamer of the present invention, the cutter body is cylindrical, and the ratio of length to diameter of the cutter body is 8-15:1.

Compared with the prior art, the beneficial effect of the present invention is that the single-edged chip-breaking elongated reamer of the present invention is easy to use, flexible in operation, and has a completely independent chip-holding space. The combination of reaming and extrusion not only makes the cutting process more stable, but also can break chips very well, improving the machining accuracy and rigidity.

In addition, compared with the existing reamer, the single-edged chip-breaking elongated reamer of the present invention allows more reaming allowance to be reserved, so the rough reaming process can be saved and the working efficiency can be improved. Moreover, when the machining allowance is small and uniform, the reamer of the present invention can provide a sufficiently large cutting force and select a larger feed rate while performing fine reaming.

Further, the guide of the reamer of the present invention reduces the overall weight, makes the distribution of cutting force more reasonable, and achieves the purpose of enhancing the rigidity of the tool without increasing the weight of the tool. Widely applicable to high-speed and high-efficiency reaming, deep-hole precision tools, economic and social effects are significant, and the application prospect is good.

Description of drawings

Fig. 1 is the schematic plan view of existing a kind of multi-edged reamer;

Fig. 2 is the schematic plan view of another existing multi-edged reamer;

Fig. 3 is a schematic plan view of a specific embodiment of the single-edged chip-breaking elongated reamer of the present invention;

Fig. 4 is the enlarged schematic view of part I in Fig. 3;

Fig. 5 is a schematic diagram of the cutter head part in Fig. 3 .

Detailed ways

The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

Changes and modifications shown in Figures 3 to 5. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

As shown in FIGS. 3 to 5 , the single-edged chip-breaking elongated reamer 100 of the present invention includes: a cutter body 10 , a cutter head 20 formed at one end of the cutter body 10 , and a handle formed at the other end of the cutter body 10 30. Among them, the cutter head 20 is used for cutting, and the cutter body 10 plays a guiding role. Therefore, the cutting and guiding of the single-edged chip-breaking elongated reamer of the present invention are respectively undertaken by two different parts on the reamer.

The cutter head 20 has a first cutting edge 21 and a second cutting edge 22 . Wherein, the first blade 21 and the second blade 22 form a double-edged structure, and the resultant force of the radial force and the tangential force of the two serves as a guiding, supporting and extruding function. Specifically, the first cutting edge 21 is located at one end of the cutting head 20 , its length is 1mm-3mm, and the bevel angle A is 25°-45°. Wherein, the bevel angle refers to the included angle between the tangential direction of the first blade 21 and the radial direction of the cutter body 10 . The second blade 22 plays the role of cutting most of the margin, its length is 0.5mm-2mm, and the main deflection angle is 3°-15°, wherein, the main deflection angle refers to the tangential direction of the second blade 22 and the cutter body. The angle between the axial directions of 10. In addition, the cutter head 20 has a rake face, and a chip breaker 23 is opened on the rake face, and the chip breaker 23 makes the cutting process more stable, thereby achieving a good chip breaking effect.

The cutter body 10 forms the guide part of the reamer of the present invention. Preferably, the cutter body 10 is cylindrical, and the ratio of its length to diameter is: 8-15:1. Therefore, the cutter body 10 is longer, so that the rigidity of the cutting part of the cutter head can be improved, and the cutting of the cutter head is carried out on a reliable support and guide basis during the whole processing process, so as to ensure the processing accuracy. In addition, the cutter body 10 is also provided with a chip pocket 11 , which enables the cutting edge to have an independent chip space, and one end of the chip pocket 11 communicates with the chip breaker 23 on the rake face. Further, the chip flute 11 is extended along the length direction of the cutter body 10 .

Said shank 30 forms the mounting end of the reamer of the invention.

The cutting efficiency of the reamer of the present invention and the existing reamer will be compared with the test data below. Non-ferrous metals are processed, such as aluminum alloys. The results are shown in Table 1 below:

cutting condition Reamer of the present invention existing reamer Processing methods 2-layer processing, cutting depth 90mm 3-layer processing, cutting depth 90mm Cutting efficiency 500% 100%

It can be seen that, compared with the existing reamer, the reamer of the present invention has higher cutting efficiency.

In summary, the single-edged chip-breaking elongated reamer of the present invention is easy to use and flexible to operate, and has a completely independent chip-holding space. The combination of reaming and extrusion not only makes the cutting process more stable, but also can break chips very well, improving the machining accuracy and rigidity.

In addition, compared with the existing reamer, the single-edged chip-breaking elongated reamer of the present invention allows more reaming allowance to be reserved, so the rough reaming process can be saved and the working efficiency can be improved. Moreover, when the machining allowance is small and uniform, the reamer of the present invention can provide a sufficiently large cutting force and select a larger feed rate while performing fine reaming. It can increase the cutting speed by 60-90%, and can increase the single-tooth chip breaking ability, and improve the cutting efficiency by 3-5 times.

Further, the guide of the reamer of the present invention reduces the overall weight, makes the distribution of cutting force more reasonable, and achieves the purpose of enhancing the rigidity of the tool without increasing the weight of the tool. Widely applicable to high-speed and high-efficiency reaming, deep-hole precision tools, economic and social effects are significant, and the application prospect is good. It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (6)

1. a single-blade chip breaking extended type reamer, is characterized in that, described single-blade chip breaking extended type reamer comprises: cutter hub, be formed at the cutter head of cutter hub one end and be formed at the handle of a knife of the described cutter hub other end;

Described cutter head has the first blade and the second blade, and described second knife-edge is formed between described first blade and cutter hub, and described first knife-edge is formed in the end of described cutter head, and described cutter head has rake face, and described rake face offers chip-breaker;

Described cutter hub forms the targeting part of described reamer;

Described handle of a knife forms the installation end of described reamer.

2. single-blade chip breaking extended type reamer according to claim 1, is characterized in that, the length of described first blade is 1mm ~ 3mm, and the oblique angle of the second blade is 3 ° ~ 15 °.

3. single-blade chip breaking extended type reamer according to claim 1, is characterized in that, the length of described second blade is 0.5mm ~ 2mm, and the tool cutting edge angle of the first blade is 25 ° ~ 45 °.

4. single-blade chip breaking extended type reamer according to claim 1, it is characterized in that, described cutter hub also offers chip pocket, described chip pocket one end is connected with the chip-breaker on described rake face.

5. single-blade chip breaking extended type reamer according to claim 4, it is characterized in that, described chip pocket is extended along the length direction of described cutter hub.

6. single-blade chip breaking extended type reamer according to claim 1, it is characterized in that, described cutter hub is cylindrical, and the length of described cutter hub and the ratio of diameter are: 8-15:1.