CN210334455U

CN210334455U - Small-diameter deep hole drill for processing small hole when passing through large hole

Info

Publication number: CN210334455U
Application number: CN201921055718.5U
Authority: CN
Inventors: 姚国阳
Original assignee: Bestool Tool Manufacturing Co ltd
Current assignee: Bestool Tool Manufacturing Co ltd
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-04-17
Anticipated expiration: 2029-07-08

Abstract

The utility model belongs to the technical field of machining drilling, especially, relate to a minor diameter deep hole bores for processing aperture through during macropore, including cutter body and interface, the top of cutter body is the conical surface form, and its top is equipped with two chip grooves, the top of cutter body, along two chip groove lateral wall diagonal angle is provided with central blade and middle blade, cutter body edge central blade place be equipped with peripheral blade on the chip groove lateral wall, cutter body top peripheral surface front end is equipped with two preceding backup pads, be equipped with three middle part backup pads on the cutter body middle part outer peripheral face. The utility model has the advantages that: the cutter blade and the support plate are placed reasonably, the cutter body length is lengthened, the three support plates are added, the support area and the support length of the cutter body are increased, the deep hole drill is guaranteed to keep the original straight line for cutting when passing through a large hole, and the hole accuracy is increased.

Description

Small-diameter deep hole drill for processing small hole when passing through large hole

Technical Field

The utility model belongs to the technical field of machining drilling, especially, relate to a minor diameter deep hole bores for processing aperture when passing through the macropore.

Background

In recent years, the manufacturing industry of China is developed at a high speed continuously, the manufacturing industry of China is a main contributor of unprecedented economic development since the new China is built, the modern material civilization of China people is absent without the development of the manufacturing industry of China, the manufacturing industry of China as a supplier of national and civil requirements is an industry which cannot be opened at any time, the manufacturing capability is absent, the international position is absent, and the manufacturing industry is not only a big thing of the manufacturing industry, but also a big thing of national safety. China has now developed into a large manufacturing country. Countries around the world are heavily imported and use chinese products, of which mechanical products account for the vast majority. In the manufacturing industry of China, a large amount of hole machining is involved, however, deep hole machining in hole machining is indispensable. The method mainly comprises the processing of a jet suction drill and a single pipe drill. For example, pistons, internal combustion engines (cylinder blocks) in the automobile industry, gas turbine shafts of airplanes, gun barrels in the defense industry and the like can not be subjected to deep hole machining. In the drilling process, because the blades of the deep hole drill are swung to a certain angle to enable the blades to be stressed in a balanced manner, each blade has a proper rotating speed, and the drill body has good stability after the drilling process. Two suitable support plates ensure the cylindricity and straightness of the drilled hole. Reasonable cutting parameters and high-quality structural design ensure the machining effect meeting the requirements. With the progress of society, the processing of simple holes can not meet the requirements of customers, and the conditions of complex holes are endless. And small holes are processed through the large holes on the premise of ensuring the precision of the holes, the service life of the cutter, the service life of the blade and the processing economy, so that the difficulty is very high.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of above-mentioned prior art, the utility model provides a minor diameter deep hole bores for processing aperture when passing through the macropore, blade and backup pad are put rationally, have lengthened cutter body length simultaneously and add three backup pad, are used for increasing the holding area and the support length of cutter body, guarantee that the deep hole bores keeps original straight line to cut when passing through the macropore.

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

a small-diameter deep hole drill for processing small holes in large holes is characterized by comprising a cutter body and an interface, wherein the cutter body is connected with the interface through a positioning surface, connecting threads are arranged on the periphery of the interface, the top of the cutter body is in a conical surface shape, two chip grooves are formed in the top of the cutter body, the two chip grooves are arranged diagonally and communicated with a chip removal hole in the middle of the cutter body, a central blade and a middle blade are arranged on the top of the cutter body along the diagonal walls of the two chip grooves, peripheral blades are arranged at the edge of the cutter body and on the side walls of the chip grooves where the central blade is located, the inner side cutting edge fillet of the central blade passes through the center of the cutter body, the height of the central blade is lower than that of the chip grooves, the middle blade is arranged on the middle diameter of the cutter body, and two front supporting plates are arranged at the front, three middle supporting plates are arranged on the outer peripheral surface of the middle part of the cutter body.

Preferably, the peripheral blade forms a feed and avoidance angle of 1.25 degrees with the vertical direction.

Preferably, the vertical height of the cutting edge of the middle blade is lower than the vertical height of the cutting edge of the peripheral blade.

Preferably, the central blade is lower than the central position of the cutter body, and the central position is enabled to obtain a proper linear speed during cutting so as to facilitate processing.

Preferably, the middle blade, the central blade and the peripheral blade are fixed in the blade grooves of the cutter body by screws and are arranged in a straight line.

Preferably, two front support plates adopt a 0.43-degree inverted cone, and three middle support plates adopt a 5' taper.

Preferably, the two front support plates are located at the periphery of the cutter body and the chip grooves, one front support plate is located on an extension line of the axis of the middle blade, the other front support plate is located on the periphery of the cutter body, and an included angle between the center of the two front support plates and a connecting line of the centers of the cutter body is 90-120 degrees.

Preferably, the three middle support plates are uniformly distributed in the middle of the periphery of the cutter body, and two of the middle support plates are respectively positioned under the two front support plates.

Preferably, in order to prevent chip blockage, the chip removal groove adopts a large-wide-mouth chip removal hole as far as possible under the condition of meeting the strength of the cutter body.

Preferably, for the convenience of installation, three sections are milled away at the position of the interface with the largest interference fit, namely the positioning surface.

The utility model has the advantages that: the utility model discloses a big wide-mouth chip removal hole can effectually be discharged the drill chip under the fast-speed liquid of high pressure condition of flowing to the degree of accuracy in the hole of drilling when increasing the via hole has taken the design of 5 backup pads, and two preceding backup pads of head and three middle part backup pad play the effect simultaneously when normal drilling. When the cutter body passes through the large hole, the three middle supporting plates can play a role in supporting and guiding when the hole passes through the large hole, and the two front supporting plates are suspended, so that the cutter body can continuously cut in the original direction. The three middle supporting plates are arranged in a 5' mode, so that the supporting plates are in full contact as far as possible, the cutter body can process deep holes in the original straight line when passing through the large hole, and the design ensures the straightness and cylindricity of the deep holes; the two front supporting plates are fixed in a taper of 0.43 degrees, so that the cutter has more accurate straightness during deep hole machining, and the supporting plates can be reused. The utility model discloses blade and backup pad are put rationally, have lengthened cutter body length simultaneously and have added three middle part backup pad, are used for increasing the support area and the support length of cutter body, have guaranteed that the deep hole bores keeps original straight line to cut when passing through the macropore, the long service life of blade, the hole precision of processing is high.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of the present invention;

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

fig. 4 is a top view of the present invention;

fig. 5 is a simulation diagram of the usage process of the present invention.

In the figure, the cutter comprises a middle blade 1, a middle blade 2, a center blade 3, a screw 4, a peripheral blade 5, a chip groove 6, a cutter body 7, a middle supporting plate 8, a wrench clamping position 9, a connector 10, a front supporting plate 11, a positioning surface 12, a connecting thread 13 and a workpiece.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings, which are only used for explaining the present invention, and are illustrative of the embodiments of the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, the description made based on the orientation or positional relationship shown in the drawings is only for convenience of description and simplification of description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terminology used in the description is intended to be interpreted broadly unless explicitly stated or limited otherwise. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in figures 1-4, the utility model provides a minor diameter deep hole bores for processing aperture when passing through macropore, including cutter body 6 and interface 9, connect through locating surface 11 between cutter body 6 and the interface 9, the cutter body 6 lower extreme is equipped with spanner screens 8. The interface 9 is provided with a connecting thread 12, which may be an internal thread or an external thread, depending on the structure connected thereto. The top of cutter body 6 is the conical surface form, and its top is equipped with two chip grooves 5, and two chip grooves 5 diagonal angle sets up to communicate to the chip removal hole in the cutter body 6, in order to prevent stifled bits, chip groove 5 adopts big wide-mouth chip removal hole as far as under the condition that satisfies cutter body 6 intensity. For the convenience of installation, three sections are milled at the position of the interface 9 with the maximum interference fit, namely the position surface 11.

The top of the cutter body 6 is diagonally provided with a central blade 2 and a middle blade 1 along the side walls of two chip grooves 5, and the edge of the cutter body 6 and the side wall of the chip groove 5 where the central blade 2 is arranged are provided with peripheral blades 4, namely three blades. The reasonable overlapping arrangement of the blades facilitates the gradual cutting-in of the blades. Wherein, the inner side cutting edge fillet of the central blade 2 passes through the center of the cutter body 6, and the central blade 2 is lower than the chip groove 5, thus the blade can be protected; the middle insert 1 is located near the center of the cutter body 6.

In order to prolong the service life of the middle blade 1, the central blade 2 and the peripheral blade 4, share the cutting amount and increase the durability, the peripheral blade 4 is placed on the drilling intermediate diameter, and the peripheral blade 4 forms a feed avoiding angle of 1.25 degrees with the vertical direction. The peripheral blade 4 is placed at the 0-line position. The rear cutter face of the peripheral blade 4 and the cutter body 6 reserve a proper avoiding distance, and the axial height of the cutting edge of the peripheral blade 4 is not lower than that of the middle blade 1. The inner edge radius of the center blade 2 is over-centered and raised by a suitable center height. The middle blade 1 and the other two blades adopt a suitable degree of overlap. The middle blade 1, the central blade 2 and the peripheral blade 4 are all fixed in blade grooves of the cutter body 6 by screws 3 and are arranged in a straight line shape. The vertical height of the cutting edge of the middle blade 1 must be lower than that of the cutting edge of the peripheral blade 4. The central blade 2 is lower than the center, and the center position obtains the proper linear speed during the cutting process, so that the processing is convenient.

The rotating area of the middle blade 1 is complementary to or intersects with the rotating area of the central blade 2 and the peripheral blade 4, namely, the central blade 2 and the peripheral blade cut the workpiece 13 at the positions which are not cut by the middle blade 1, the minimum revolving diameter of the middle blade 1 is larger than or equal to the maximum revolving diameter of the central blade 2, the maximum revolving diameter of the middle blade 1 is smaller than or equal to the minimum revolving diameter of the peripheral blade 4, and the central blade 2, the peripheral blade 4 and the middle blade 1 rotate for one circle to form a complete circle.

Chips cut by the central blade 2 and the peripheral blade 4 enter the chip removal hole along the same chip removal groove 5, and chips cut by the middle blade 1 enter the chip removal hole along the other chip removal groove 5.

The front end of the peripheral surface of the top end of the cutter body 6 is provided with two front supporting plates 10, the peripheral surface of the middle part of the cutter body 6 is provided with three middle supporting plates 7, the front supporting plates 10 are positioned at the periphery of the cutter body 6 and the chip groove 5, one front supporting plate 10 is positioned on the extension line of the axis of the middle blade 1, the other front supporting plate 10 is positioned on the peripheral surface of the cutter body 6, and the included angle between the centers of the two front supporting plates 10 and the central connecting line of the cutter body 6 is 90-120 degrees. The three middle supporting plates 7 are uniformly distributed in the middle of the periphery of the cutter body 6, and two of the middle supporting plates 7 are positioned under the two front supporting plates 10. The two front support plates 10 adopt a 0.43 degree back taper, and the three middle support plates 7 adopt a 5' taper.

The two front support plates 10 are fixed in a taper of 0.43 degrees, so that the cutter has more accurate straightness during deep hole processing, and the support plates can be reused. The effect that three backup pads in cutter body 6 portion played is exactly when passing through the macropore, two preceding backup pads 10 are unsettled, and the three backup pad in middle part plays the supporting role, because the atress is great, so three middle part backup pad 7 becomes 5' and puts, makes the backup pad contact as far as totally, can make cutter body 6 go with original straight line to process the deep hole like this when passing through the macropore again. The design ensures the straightness and cylindricity of the deep hole. Three blades on the cutter body 6 are 800 blades, the blades are reasonably placed to enable the cutter body 6 to be even in stress and more stable in cutting, the cutter body 6 is fixed by outer circle positioning and four-head threads, the straightness and cylindricity of a processed deep hole are further guaranteed, the chip grooves 5 are large wide-mouth chip removal holes meeting the strength, and the chip stacking phenomenon can be effectively prevented under the condition that high-speed liquid flows.

The utility model discloses a big wide-mouth chip removal hole can effectually be discharged the drill chip under the fast-speed liquid flow condition of high pressure. And in order to increase the accuracy of the drilled holes during the via-drilling, the design of 5 support plates is adopted, and two front support plates 10 and three middle support plates 7 at the head part play a role simultaneously during the normal drilling. When the cutter body passes through the large hole, the three middle supporting plates 7 can play a role in supporting and guiding when the cutter body passes through the large hole, so that the cutter body 6 can continuously cut in the original direction. Fig. 5 is a simulation diagram in the using process, and the design can ensure that the cutter body 6 keeps the original straightness and coaxiality when drilling a deep hole with a small hole diameter on the workpiece 13 through a large hole.

The above detailed description is for one embodiment of the present invention, but the above description is only for the preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. The utility model provides a minor diameter deep hole bores for processing aperture when passing through macropore which characterized in that includes cutter body and interface, the cutter body with connect through the locating surface between the interface, the interface periphery is equipped with connecting thread, the top of cutter body is the conical surface form, and its top is equipped with the chip groove of two diagonal angle settings, the top of cutter body, along two chip groove lateral wall diagonal angle is provided with central blade and middle blade, cutter body edge the central blade is located be equipped with peripheral blade on the chip groove lateral wall, cutter body top peripheral surface front end is equipped with two preceding backup pads, be equipped with three middle part backup pads on the cutter body middle part outer peripheral face.

2. The small diameter deep hole drill according to claim 1, wherein the inner edge radius of the center insert passes through the center of the cutter body, and the height of the center insert is lower than the height of the center of the cutter body and the height of the junk slots.

3. The small diameter deep hole drill of claim 1, wherein said middle blade is located at the middle diameter of said cutter body, and the vertical height of said cutting edge of said middle blade is lower than the vertical height of said cutting edge of said peripheral blade.

4. The small diameter deep hole drill according to claim 1, wherein the peripheral blade is at a feed relief angle of 1.25 degrees from vertical.

5. The small diameter deep hole drill according to claim 1, wherein the middle insert, the center insert, and the peripheral insert are all fixed in the insert groove of the cutter body by screws and are arranged in a line.

6. The small-diameter deep hole drill according to claim 1, wherein two front support plates are formed with a 0.43 ° back taper, and three middle support plates are formed with a 5' taper.

7. The small-diameter deep hole drill according to claim 1, wherein two of the front support plates are located at the periphery of the cutter body and the chip grooves, one of the front support plates is located on an extension line of the axis of the middle blade, the other front support plate is located on the outer peripheral surface of the cutter body, and an included angle between the centers of the two front support plates and a connecting line of the centers of the cutter body is 90-120 °.

8. The small-diameter deep hole drill according to claim 1, wherein three middle support plates are uniformly distributed in the middle of the outer periphery of the cutter body, and wherein two middle support plates are respectively located right below two front support plates.

9. The small diameter deep hole drill according to claim 1, characterized in that the chip flutes are large wide-mouth chip removal holes.

10. The small diameter deep hole drill according to claim 1, wherein three sections are milled away at the interface maximum interference fit, i.e. the locating surface.