CN216177240U

CN216177240U - Reamer for deep hole machining

Info

Publication number: CN216177240U
Application number: CN202122298205.0U
Authority: CN
Inventors: 余昌水; 薛亚男
Original assignee: Shaanxi Fast Gear Co Ltd
Current assignee: Shaanxi Fast Gear Co Ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2022-04-05
Anticipated expiration: 2031-09-22

Abstract

The utility model relates to the technical field of fine hole machining, in particular to a reamer for deep hole machining, which comprises a front guide section, a reaming section and a rear support section which are sequentially connected, wherein the diameter of the front guide section is smaller than that of the reaming section, the cross-sectional area of the rear support section is smaller than that of the reaming section, and the length of the rear support section is greater than the sum of the lengths of a first machining section and a middle discontinuous section of a sample. According to the reamer for processing the deep hole, the expanding, reaming and supporting are integrated into one cutter, and the original drilling-expanding-reaming mode is replaced by the drilling-reaming processing mode, so that the requirement on high dimensional precision is met, the cost investment of tools and cutters is reduced, the processing efficiency is improved, and the processing cost of the whole part is reduced.

Description

Reamer for deep hole machining

Technical Field

The utility model relates to the field of fine hole machining technology, in particular to a reamer for deep hole machining.

Background

With the continuous development of the mechanical industry, the structure of mechanical parts is more and more complex, and the processing difficulty is more and more high, for example, in the processing of a deep and long fine hole on an aluminum alloy shell in our factory, the depth-diameter ratio of the hole reaches more than 10 times of the diameter, the hole is a non-continuous fine hole with the requirements on coaxiality and position degree, the processing difficulty is high, and the processing cost is high.

Usually, the deep and long hole of the discontinuous precise hole is processed by adopting a lengthened drill bit, a lengthened expanding cutter and a lengthened reamer, wherein the drill bit is used for preliminarily removing the allowance in the hole, the expanding cutter is used for ensuring the requirement of position degree and keeping uniform allowance for finish machining of the reamer for deep hole processing, and the reamer for deep hole processing is used for ensuring the requirement of final diameter size precision.

The method has the advantages of multiple types of cutters, low processing efficiency, large clamp design investment, poor process stability and reliability, and waste products caused by loss of positioning precision due to abrasion of the cutters and the supporting bushings.

SUMMERY OF THE UTILITY MODEL

Aiming at the problem of lower processing precision in the processing of deep holes in the prior art, the utility model provides the reamer for processing the deep holes, which is used for carrying out structural optimization design on a processing cutter and designing reasonable processing steps, can effectively solve the technical requirements of high-precision diameter size, high position precision and high coaxiality of the holes, and can solve the problem of low processing efficiency of the holes.

The utility model is realized by the following technical scheme:

a reamer for deep hole machining comprises a front guide section, a hinge machining section and a rear support section which are sequentially connected, wherein the diameter of the front guide section is smaller than that of the hinge machining section, the cross-sectional area of the rear support section is smaller than that of the hinge machining section, and the length of the rear support section is larger than the sum of the lengths of a first machining section and a middle discontinuous section of a sample.

Preferably, the difference value between the diameter of the front guide section and the diameter of the hinging section is 0.3-0.5 mm.

Preferably, the difference value between the diameter of the circumscribed circle of the rear support section and the diameter of the hinging section is 0.01-0.015 mm.

Preferably, the cross section of the rear support section is polygonal, the adjacent side edges are in arc transition, and the diameter of the transition arc is equal to the diameter of a circumscribed circle of the rear support section.

Preferably, the blade part of the front guide section and the blade part of the reaming section are provided with soldering lugs.

Preferably, the bonding pad is made of PCD material.

Preferably, the front guide section, the hinge processing section and the rear support section are all provided with inner cooling holes.

Preferably, the length of the front guide section is 10-20 mm.

Preferably, the length of the reaming section is 10-20 mm.

Compared with the prior art, the utility model has the following beneficial effects:

according to the reamer for processing the deep hole, the expanding, reaming and supporting are integrated into one cutter, and the original drilling-expanding-reaming mode is replaced by the drilling-reaming processing mode, so that the requirement on high dimensional precision is met, the cost investment of tools and cutters is reduced, the processing efficiency is improved, and the processing cost of the whole part is reduced. The back support section plays the effect of supporting the reaming section, be equivalent to all there are guide and support around when reaming processing, the reamer for BTA has longer back support section simultaneously, promptly when processing the second processing section, the back support is still in the first processing section of processing, when the cutter gos deep into to the second processing section from middle discontinuous section, the cutter still has the support nature, almost no swing, not only can continue to maintain higher cutting speed, simultaneously when processing income second processing section, processing is steady, ensure the axiality requirement, simultaneously because of the supporting part is less with final diameter size part difference, promptly the clearance is less, can ensure the support nature to the cutter.

The blade soldering lug made of PCD materials can increase the strength of the blade of the front guide section and the reaming section and prolong the service life of the reamer.

The length of the front guide section is not suitable to be too long, so that the increase of friction is reduced, and the influence on chip removal is reduced. The back supporting section arranged in a polygonal shape and the arranged inner cooling hole can reduce the friction during processing and provide enough chip containing space on the premise of providing enough support.

The inner cooling holes arranged at the front guide section, the hinge machining section and the rear support section can reduce machining friction and reduce machining and support resistance during machining of the whole cutter. When the cutter is machined, the inner cooling hole of the front guide section can fully cool and lubricate the cutter, has the function of expanding the cutter, can correct the position degree, and meanwhile is used for supporting the subsequent hinge machining.

Drawings

FIG. 1 is a schematic structural view of a part;

FIG. 2 is a schematic view of the construction of the drill;

fig. 3 is a schematic structural view of a reamer for deep hole processing according to the present invention.

In the figure, 1, a front guide section; 2. a reaming section; 3. a rear support section; 4. a handle; 5. soldering lugs; 6. an internal cooling hole; 7. a drill bit; 8. a drill shank; 9. a first processing section; 10. a second processing section; 11. an intermediate non-contiguous segment.

Detailed Description

The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the utility model.

Referring to fig. 1, the machining station of the part comprises a first machining section 9, an intermediate discontinuous section 11 and a second machining section 10. Referring to fig. 2, the drill bit comprises a drill bit 7 and a drill shank 8, wherein the diameter of the drill bit 7 is smaller than that of the front guide section 1 by 0.1-0.2 mm, and the difference is 0.1mm in the embodiment.

The utility model discloses a reamer for deep hole machining, which comprises a front guide section 1, a reaming section 2 and a rear support section 3 which are sequentially connected, wherein the diameter of the front guide section 1 is smaller than that of the reaming section 2, the difference value between the diameter of the front guide section 1 and the diameter of the reaming section 2 is 0.3-0.5 mm, and the difference value in the embodiment is 0.3 mm. The length of the front guide section 1 is 10-20 mm, and the length of the hinge machining section 2 is 10-20 mm.

The blade of the front guide section 1 and the blade of the reaming section 2 are welded with soldering lugs 5, and the soldering lugs 5 are made of PCD materials.

The cross-sectional area of the rear support section 3 is smaller than that of the hinge machining section 2, the difference between the diameter of the circumscribed circle of the rear support section 3 and the diameter of the hinge machining section 2 is 0.01-0.015 mm, and the difference in the embodiment is 0.01 mm. The length of the rear support section 3 is greater than the sum of the lengths of the first working section 9 and the intermediate discontinuous section 11 of the test specimen. The cross section of the rear support section 3 is polygonal, the adjacent side edges are in arc transition, and the diameter of the transition arc is equal to that of a circumscribed circle of the rear support section 3, so that the friction during processing can be reduced, and a sufficient chip containing space can be provided.

Referring to fig. 3, the front guide section 1, the hinge processing section 2 and the rear support section 3 are all provided with inner cooling holes 6. During machining, cooling liquid is introduced into the inner cooling hole 6 to play a role in cooling and lubricating, so that friction is reduced, and the resistance of the whole cutter during machining is reduced.

The end of the rear support section 3 away from the hinge section 2 is further provided with an integrally formed handle portion 4, and the cross-sectional area of the handle portion 4 is larger than that of the rear support section 3 in this embodiment.

The implementation principle of the reamer for deep hole machining provided by the utility model is as follows: firstly, processing a workpiece by using a drill cutter, then processing the workpiece by using a reamer, wherein the front guide section 1 adopts lower rotating speed and feeding speed when initially entering the cutter, the cutting edge of the reaming processing section 2 can be improved by a little rotating speed and feeding speed when completely immersing into the workpiece, and when the rear support section 3 enters a part of a hole, the workpiece is processed by adopting ideal rotating speed and feeding speed; when the reaming section exits the first machining section 9, the speed of rotation can be reduced appropriately, with a constant feed rate. When the front guide section 1 is close to the orifice of the middle discontinuous section 11, feeding is reduced by a little, and then when the front guide section 1 and the hinge machining section 2 are completely immersed into the orifice of the middle discontinuous section 11, ideal rotating speed and feeding speed are adopted for machining until the hinge machining section 2 completely comes out of the middle discontinuous section 11, at the moment, the rotating speed is reduced, machining feeding is stopped, then the first machining section 9 is completely withdrawn at higher tool withdrawal feeding speed, and machining is completed. The whole machining process needs to be started and cooled in a machine tool, so that the machining process is fully cooled and lubricated, and meanwhile, cutting scraps can be flushed out in time.

According to the reamer for processing the deep hole, the expanding, reaming and supporting are integrated into one cutter, and the original drilling-expanding-reaming mode is replaced by the drilling-reaming processing mode, so that the requirement on high dimensional precision is met, the cost investment of tools and cutters is reduced, the processing efficiency is improved, and the processing cost of the whole part is reduced.

Claims

1. The reamer for deep hole machining is characterized by comprising a front guide section (1), a hinge machining section (2) and a rear support section (3) which are sequentially connected, wherein the diameter of the front guide section (1) is smaller than that of the hinge machining section (2), the cross sectional area of the rear support section (3) is smaller than that of the hinge machining section (2), and the length of the rear support section (3) is larger than the sum of the lengths of a first machining section (9) and a middle discontinuous section (11) of a sample.

2. The reamer for deep hole processing according to claim 1, wherein the difference between the diameter of the front guide section (1) and the diameter of the reaming section (2) is 0.3 to 0.5 mm.

3. The reamer for deep hole processing according to claim 1, wherein the difference between the diameter of the circumscribed circle of the rear support section (3) and the diameter of the reaming section (2) is 0.01 to 0.015 mm.

4. The reamer for deep hole machining according to claim 1, wherein the cross section of the rear support section (3) is polygonal, the adjacent sides are in arc transition, and the diameter of the transition arc is equal to the diameter of a circumcircle of the rear support section (3).

5. The reamer for deep hole machining according to claim 1, characterized in that the edge of the front guide section (1) and the edge of the reaming section (2) are provided with lugs (5).

6. The reamer for deep hole machining according to claim 5, characterized in that said lug (5) is made of PCD material.

7. The reamer for deep hole machining according to claim 1, wherein the front guide section (1), the reaming section (2) and the rear support section (3) are provided with internal cooling holes (6).

8. The reamer for deep hole processing according to claim 1, wherein the length of the front guide section (1) is 10 to 20 mm.

9. The reamer for deep hole processing according to claim 1, wherein the length of the reaming section (2) is 10 to 20 mm.