CN220547887U - Drilling reamer - Google Patents

Abstract

The application discloses a drill reamer relates to the technical field of cutter, and it includes the cutter body, the cutter body includes cutter head portion and cutter body portion, the cutter head portion spiral is equipped with in proper order and supports first, support second and support third of cutting edge, establishes to the sword groove between the adjacent two support cutting edge, the cutter head portion is established to rotational symmetry structure, support second and support third of cutting edge establish to unequal structure. The drilling accuracy improvement method has the effect of improving the drilling accuracy.

Description

Drilling reamer

Technical Field

The application relates to the technical field of cutters, in particular to a drilling reamer.

Background

A drill reamer is a cutting tool for metal working, also known as a reamer. It is typically comprised of a handle and a blade. The insert has one or more cutting edges thereon for cutting a hole in a workpiece. The reamer may be used to drill and ream holes, i.e., to drill and trim holes in a workpiece simultaneously. It is commonly used in metalworking processes in the manufacturing industry, such as machining, die manufacturing, and part machining.

There are many different types of drill reamers. Fixed edge reamer reamers are most commonly used, in which the cutting edge on the blade is stationary and the cutting operation is performed by rotating the shank. The diameter of the blade of the adjustable drilling reamer can be adjusted by adjusting a screw mechanism on the cutter handle so as to adapt to the apertures with different sizes. The cutting edge of the spiral drill reamer is spiral and is suitable for deep hole machining. A drill reamer having a cutting fluid passage may cool and lubricate a cutting area by spraying the cutting fluid. The wire broach is adapted to cut at the bottom of the hole. According to specific processing requirements and workpiece characteristics, a proper drilling reamer can be selected for metal processing.

For the related art, the auger reamer adopts a rotary cutting mode when drilling, unavoidable vibration can be generated when the auger reamer cuts, and the prior auger reamer blade belt can generate errors in drilling specification when vibrating, so that the drilling accuracy is reduced.

Disclosure of Invention

In order to improve drilling accuracy, the present application provides a drill reamer.

The application provides a drill reamer adopts following technical scheme:

the utility model provides a drill reamer, includes the cutter body, the cutter body includes cutter head portion and cutter body portion, the cutter head portion is established to rotational symmetry structure, the cutter head portion spiral is equipped with support margin one, support margin two and support margin three in proper order, establishes to the sword groove between the adjacent two support margins, support margin two and support margin three are established to unequal structure.

Through adopting above-mentioned technical scheme, the tool bit portion of cutter body is used for drilling, and the tool bit portion is used for the installation of cutter, and the first cutting edge of support margin, support margin two and support margin three be the minor cutting edge, and three support margin rotational symmetry forms three sword six sword structures, can improve cutting efficiency and cutting quality, and the support margin two and support margin three are established to be unequal structure and can play fine suppression effect to the vibration of cutter to the error when reducing the drilling, thereby improve drilling accuracy, unequal structure can also make the smear metal that drilling produced more easily discharge simultaneously, reduces cutting resistance.

Optionally, the groove front angle of the first supporting edge margin and the groove front angle of the second supporting edge margin are set to be positive groove front angles and different in angle.

By adopting the technical scheme, the groove front angle refers to the included angle between the cutting edge of the cutter and the surface of the workpiece. The size of the groove rake angle has important influences on cutting force, cutting temperature, service life of the cutting edge and the like, the groove rake angle of the supporting cutting edge first is different from the groove rake angle of the supporting cutting edge second in angle, and the cutting edge with the positive groove rake angle can reduce cutting force and cutting temperature, improve cutting stability and further improve drilling precision.

Optionally, the groove rake angle of the supporting margin three is set to be a negative groove rake angle.

By adopting the technical scheme, the cutting force of the cutter can be increased by adding the blade with the negative groove rake angle, so that the cutting efficiency is improved, and meanwhile, the cutting quality and the cutting stability can be improved by the proper negative groove rake angle, and the cutting vibration and the cutting noise are reduced.

Alternatively, the groove front angle of the first supporting cutting edge margin is set to 13 degrees, the groove front angle of the second supporting cutting edge margin is set to 5 degrees, and the groove front angle of the third supporting cutting edge margin is set to-1.5 degrees.

Through adopting above-mentioned technical scheme, the groove rake angle of three support margins sets up to this numerical value, can realize better cutting force control under the cutting circumstances of difference, realizes cutting and cutting the function of repairing, makes the drilling pore wall smoother, can prolong the life of cutting edge simultaneously.

Optionally, the top angle of the cutter head part is set to be 140 degrees.

Through adopting above-mentioned technical scheme, the apex angle of cutter head portion is set to 140 and can make the vibration when drilling as far as possible minimum on the basis of guaranteeing the rigidity and the toughness of cutter, also can have better centering effect simultaneously.

Optionally, the back taper value of each cutting edge of the cutter head is 0.05-0.06/100.

By adopting the above technical scheme, the cutter blade part is designed into the inverted cone shape and is often used in the situation that deep hole machining is required or cutting is required in a narrow space. Due to the inverted cone shape of the blade portion, the tool can more easily enter a narrow aperture or a concave-convex curved surface, and perform an effective cutting operation. In addition, the back taper cutter can reduce cutting force and vibration, improve cutting quality and cutter service life, and the smaller back taper value can enable three supporting cutting edges to better play a supporting role.

Optionally, a chamfer is arranged at one end of the cutter body part far away from the cutter head part.

Through adopting above-mentioned technical scheme, blade portion sets up the chamfer and can make things convenient for the installation and the dismantlement of this cutter, makes the cutter after wearing and tearing more convenient change.

Optionally, the whole cutter body material is processed by adopting K30-K40 materials.

By adopting the technical scheme, the K30-K40 cutter material has high hardness, can keep the sharpness of the cutting edge of the cutter in the cutting process, and prolongs the service life of the cutter; the wear resistance is excellent, the cutting performance of the cutter can be maintained in the long-time cutting process, the abrasion of the cutter is reduced, and the cutting efficiency is improved; the cutting tool has good cutting performance, can generate smaller cutting force and cutting temperature in the cutting process of different materials, and improves the quality of a cutting surface.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the three supporting cutting edges are rotationally symmetrical to form a three-knife six-edge structure, so that the cutting efficiency and the cutting quality can be improved, the two supporting cutting edges and the three supporting cutting edges are arranged in unequal structures, a good inhibiting effect can be achieved on vibration of a cutter, errors in drilling are reduced, the drilling accuracy is improved, and meanwhile chips generated by drilling can be discharged more easily due to the unequal structures, and the cutting resistance is reduced;

2. the reverse taper shape of the cutter blade portion is often used when deep hole machining is required or cutting is required in a narrow space. Due to the inverted cone shape of the blade portion, the tool can more easily enter a narrow aperture or a concave-convex curved surface, and perform an effective cutting operation. In addition, the back taper cutter can reduce cutting force and vibration, improve cutting quality and service life of the cutter, and the three supporting cutting edges can better play a supporting role due to the smaller back taper value;

the K30-K40 cutter material has high hardness, can keep the sharpness of the cutting edge of the cutter in the cutting process, and prolongs the service life of the cutter; the wear resistance is excellent, the cutting performance of the cutter can be maintained in the long-time cutting process, the abrasion of the cutter is reduced, and the cutting efficiency is improved; the cutting tool has good cutting performance, can generate smaller cutting force and cutting temperature in the cutting process of different materials, and improves the quality of a cutting surface.

Drawings

Fig. 1 is a schematic overall structure of an embodiment of the present application.

Fig. 2 is a side view of the overall structure of an embodiment of the present application.

Fig. 3 is a cross-sectional view of a head portion of an embodiment of the present application.

Reference numerals illustrate:

1. a cutter body; 11. a cutter head part; 111. supporting a first cutting edge; 112. supporting a second cutting edge; 113. supporting a third cutting edge; 114. a knife slot; 12. a blade body portion; 121. chamfering.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses a drill reamer.

The data units of this example are all millimeters.

Referring to fig. 1, a reamer body 1 is formed by integrally processing a cutter body 1 material by adopting a K30-K40 material, wherein the K30-K40 cutter material has high hardness, so that the sharpness of a cutting edge of a cutter can be maintained in a cutting process, and the service life of the cutter is prolonged; the wear resistance is excellent, the cutting performance of the cutter can be maintained in the long-time cutting process, the abrasion of the cutter is reduced, and the cutting efficiency is improved; the cutter body 1 comprises a cutter head part 11 and a cutter body part 12, the cutter head part 11 and the cutter body part 12 are integrally arranged, the cutter head part 11 is sequentially provided with a first supporting cutting edge 111, a second supporting cutting edge 112 and a third supporting cutting edge 113 in a spiral manner, the first supporting cutting edge 111 serves as a main cutting edge, the second supporting cutting edge 112 and the third supporting cutting edge 113 serve as auxiliary cutting edges, and the cutter body 1 is installed on corresponding equipment through the cutter body part 12 to realize drilling processing of a workpiece.

Referring to fig. 1, one end of the cutter body 12, which is far away from the cutter head 11, is provided with a chamfer 121, the chamfer 121 is set to 45 °, and the arrangement of the chamfer 121 can facilitate the installation and the disassembly of the cutter, so that the worn cutter is more convenient to replace.

Referring to fig. 1 and 2, the tool bit 11 is in a rotationally symmetrical structure, three supporting cutting edges are rotationally symmetrical to form a three-blade six-blade structure, cutting efficiency and cutting quality can be improved, the top angle of a drill bit of the tool bit 11 is 140 degrees, a plurality of bevel surfaces symmetrical with the center of a circle are arranged at the top of the tool bit, vibration during drilling is reduced as much as possible on the basis of guaranteeing rigidity and toughness of the tool bit, a good centering effect can be achieved, the back taper values of the supporting cutting edges of the tool bit 11 are all 0.05-0.06/100, and the back taper of the tool bit means that the shape of the tool bit is the back taper shape. That is, the edge of the tool is wider at the tip and gradually narrows toward the shank. The inverted cone shape provides better cutting performance and cutting stability, so that the cutter can enter a narrow aperture or a concave-convex curved surface more easily and perform effective cutting operation. In addition, the back taper cutter can reduce cutting force and vibration, improve cutting quality and cutter life, and set up less back taper value and can make three support margin better play supporting role.

Referring to fig. 1 and 3, the supporting margin two 112 and the supporting margin three 113 are configured in unequal structures, the groove rake angle of the supporting margin one 111 and the groove rake angle of the supporting margin two 112 are configured as positive groove rake angles and are different in angle, the groove rake angle of the supporting margin three 113 is configured as negative groove rake angle, the groove rake angle of the supporting margin one 111 is configured as 13 °, the groove rake angle of the supporting margin two 112 is configured as 5 °, the groove rake angle of the supporting margin three 113 is configured as-1.5 °, the included angle between the cutting edge face of the cutter and the cutting direction is positive groove rake angle, the negative groove rake angle is indicative of the inclination of the cutting edge away from the workpiece surface, and a larger groove rake angle can reduce the cutting force and the cutting temperature, improve the self-lubricating property of the cutting edge, and reduce the abrasion and the cutting moment in the cutting process. However, an excessively large flute rake angle may cause the tool to be easily stuck or vibrated, degrading cutting stability, which is an optimal flute rake angle value determined in consideration of factors such as cutting performance, tool life, and machining efficiency.

The implementation principle of the drilling reamer is as follows: the cutter head 11 is rotationally symmetrical to support the first cutting edge 111, the second cutting edge 112 and the third cutting edge 113, an optimal groove front angle is determined, an unequal structure is formed, vibration during cutting and drilling is reduced, cutting, trimming and chip extrusion can be achieved simultaneously, meanwhile, the unequal structure can enable chips generated by drilling to be discharged more easily, cutting resistance is reduced, the tolerance of a machined workpiece is controlled within 0.01 through the design of the top angle of a drill bit of the cutter head 11 and the inverted cone of the support cutting edge, the cylindricity of the hole is close to 0.01, and roughness is close to Ra1.6, so that errors during drilling are reduced, drilling accuracy is improved, and the surface of a hole wall is smoother.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. A drill reamer, characterized in that: the cutter comprises a cutter body (1), wherein the cutter body (1) comprises a cutter head part (11) and a cutter body part (12), the cutter head part (11) is sequentially provided with a first supporting edge (111), a second supporting edge (112) and a third supporting edge (113) in a spiral mode, a cutter groove (114) is formed between two adjacent supporting edges, the cutter head part (11) is in a rotationally symmetrical structure, and the second supporting edge (112) and the third supporting edge (113) are in unequal structures.

2. A drill reamer as claimed in claim 1, wherein: the groove front angle of the first supporting cutting edge band (111) and the groove front angle of the second supporting cutting edge band (112) are set to be positive groove front angles and are different in angle.

3. A drill reamer as claimed in claim 2, wherein: the groove rake angle of the supporting margin three (113) is set as a negative groove rake angle.

4. A drill reamer according to claim 3, wherein: the groove front angle of the supporting cutting edge margin I (111) is set to 13 degrees, the groove front angle of the supporting cutting edge margin II (112) is set to 5 degrees, and the groove front angle of the supporting cutting edge margin III (113) is set to-1.5 degrees.

5. A drill reamer as claimed in claim 1, wherein: the vertex angle of the cutter head part (11) is set to 140 degrees.

6. A drill reamer as claimed in claim 1, wherein: the back taper value of each cutting edge of the cutter head part (11) is 0.05-0.06/100.

7. A drill reamer as claimed in claim 1, wherein: one end of the cutter body part (12) far away from the cutter head part (11) is provided with a chamfer (121).

8. A drill reamer as claimed in claim 1, wherein: the whole cutter body (1) is made of K30-K40 materials.