CN211889702U - Multi-span minor diameter hole coaxiality machining device - Google Patents
Multi-span minor diameter hole coaxiality machining device Download PDFInfo
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- CN211889702U CN211889702U CN202020114954.6U CN202020114954U CN211889702U CN 211889702 U CN211889702 U CN 211889702U CN 202020114954 U CN202020114954 U CN 202020114954U CN 211889702 U CN211889702 U CN 211889702U
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Abstract
The utility model discloses a multi-span minor diameter hole coaxiality processing device, which comprises a special knife handle for installing a reamer and a reamer, wherein a support ring matched with a front end hole is installed on the special knife handle, an oil supply device capable of forming a dynamic pressure oil film between the support ring and the front end hole is arranged between the support ring and the special knife handle, the oil supply device comprises an oil duct which is arranged in the special knife handle and connected with an oil circuit system of a drilling machine, a plurality of oil through holes communicated with the oil duct are circumferentially distributed on the support ring, and a plurality of oil supply holes in one-to-one correspondence with the oil through holes are arranged on the circumferential surface of the support ring; the special cutter handle penetrates through a pre-processed front end hole, radial positioning is carried out on the special cutter handle by means of the front end hole, the support ring is matched with the inner diameter of the front end hole, hydraulic oil in the oil duct passes through the oil through hole and the oil supply hole in the high-speed rotating process of the machining cutter, a dynamic pressure oil film is formed between the outer wall of the support ring and the inner wall of the front end hole, and damage to the processed front end hole due to rotation of the special cutter handle is prevented.
Description
Technical Field
The utility model relates to the technical field of machining, especially, relate to a many spans are apart from minor diameter hole axiality processingequipment.
Background
In the field of machining, the requirement of coaxiality precision for machining a multi-span small-diameter hole is always a great technical difficulty, and in the machining of a slender hole, high hole machining precision is sometimes required.
The traditional multi-span small-diameter hole machining method adopts a guide sleeve for machining, the rigidity is poor, the vibration is serious, the radial interference force borne by a drill bit is large, the hole machining size, the multi-hole coaxiality and the surface quality do not meet the technical requirements of products, and a positioning guide reference cannot be provided for the next procedure, so that the multi-span small-diameter hole machining method capable of ensuring the high-precision coaxiality is required.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve a technical problem that a high multi-span minor diameter hole axiality processingequipment of axiality is provided.
In order to solve the technical problem, the technical scheme of the utility model is that: multi-span minor diameter hole axiality processingequipment, including the special handle of a knife that is used for installing reamer and reaming sword, install the front end hole complex support ring with processing in advance on the special handle of a knife, the support ring with be provided with between the special handle of a knife can the support ring with form the oil supply unit of dynamic pressure oil film between the front end hole, oil supply unit is including setting up in the special handle of a knife and the oil duct of being connected with drilling machine oil piping system, circumference distribute on the support ring have a plurality ofly with the logical oilhole of oil duct intercommunication, the circumference of support ring on the surface be provided with a plurality ofly with the oil feed hole of logical oilhole one-to-one.
As a preferable technical scheme, a plurality of oil passing holes communicated with the oil passing holes and the oil passages are formed in the special cutter handle, and the oil passing holes correspond to the oil passing holes one to one.
As a preferable technical scheme, three or four oil through holes are circumferentially distributed on the support ring.
As a preferable technical solution, the oil passage extends axially in the special tool holder, and the oil passing hole extends radially in the special tool holder.
Due to the adoption of the technical scheme, the multi-span small-diameter hole coaxiality machining device comprises a special tool handle for mounting a hole expanding tool and a hole reaming tool, wherein a support ring matched with a pre-machined front end hole is mounted on the special tool handle, an oil supply device capable of forming a dynamic pressure oil film between the support ring and the front end hole is arranged between the support ring and the special tool handle, the oil supply device comprises an oil duct which is arranged in the special tool handle and connected with an oil circuit system of a drilling machine, a plurality of oil through holes communicated with the oil duct are circumferentially distributed on the support ring, and a plurality of oil supply holes corresponding to the oil through holes one to one are arranged on the circumferential surface of the support ring; during the use, special handle of a knife passes the front end hole of processing in advance, relies on the front end hole to carry out radial positioning to special handle of a knife, and the support ring cooperates with front end hole internal diameter, and at the high-speed rotatory in-process of processing cutter, hydraulic oil in the oil duct passes through oil through hole and oil feed hole, forms the dynamic pressure oil film between the outer wall of support ring and the inner wall in front end hole, prevents that special handle of a knife from rotating to form the harm to the front end hole that has processed.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
fig. 1 is a sectional view of a special tool shank of a reamer or a reaming tool according to an embodiment of the present invention;
fig. 2 is a schematic structural view of the drilling process of the end hole of the embodiment of the present invention;
FIG. 3 is a schematic structural view of the hole-expanding process of the end hole of the embodiment of the present invention;
fig. 4 is a schematic structural view of the end hole reaming of the embodiment of the present invention;
fig. 5 is a schematic structural view of the drilling process of the front end hole according to the embodiment of the present invention;
FIG. 6 is a schematic structural view of the front end hole reaming process according to the embodiment of the present invention;
fig. 7 is a schematic structural view of the front end hole reaming process according to the embodiment of the present invention;
in the figure: 1-front end hole; 21-a universal knife handle; 22-special tool handle; 23-a support ring; 31-oil channel; 32-oil through holes; 33-oil supply holes; 34-oil passing hole.
Detailed Description
The invention is further explained below with reference to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
As shown in fig. 1, 3 and 4, the multi-span small-diameter hole coaxiality machining device comprises a special tool holder 22 for mounting a reamer and a reaming tool, wherein a support ring 23 matched with a pre-machined front end hole 1 is mounted on the special tool holder 22, as shown in fig. 1, an oil supply device capable of forming a dynamic pressure oil film between the support ring 23 and the front end hole 1 is arranged between the support ring 23 and the special tool holder 22, the oil supply device comprises an oil passage 31 which is arranged in the special tool holder 22 and connected with an oil circuit system of a drilling machine, and the oil passage 31 axially extends in the special tool holder 22. A plurality of oil through holes 32 communicated with the oil passage 31 are circumferentially distributed on the support ring 23, and a plurality of oil supply holes 33 corresponding to the oil through holes 32 one to one are formed on the circumferential surface of the support ring 23. The special tool handle 22 is provided with a plurality of oil passing holes 34 which are communicated with the oil passing holes 32 and the oil passages 31, the oil passing holes 34 correspond to the oil passing holes 32 one by one, and the oil passing holes 34 extend in the radial direction in the special tool handle 22. Three or four oil passing holes 34 are circumferentially distributed in the special tool holder 22, the number of the oil passing holes 32 can be set according to the thicknesses of the special tool holder 22 and the support ring 23, when the special tool holder 22 and the support ring 23 are thicker, the oil passing holes 32, the oil passing holes 34 and the oil supply holes 33 can be designed more, so that a dynamic pressure oil film formed between the support ring 23 and the front end hole 1 is more uniform and the protective performance is stronger during working.
When the special tool handle 22 penetrates through the pre-processed front end hole 1 during use, the special tool handle 22 is radially positioned by means of the front end hole 1, the support ring 23 is matched with the inner diameter of the front end hole 1, and in the high-speed rotation process of a machining tool, hydraulic oil in an oil duct 31 of the special tool handle 22 forms a dynamic pressure oil film between the outer wall of the support ring 23 and the inner wall of the front end hole 1 through the oil through hole 32 and the oil supply hole 33, so that the friction force between the special tool handle and the front end hole 1 during rotation is reduced, and the special tool handle 22 is prevented from being damaged by rotation of the special tool handle to the processed.
The method for processing the coaxiality of the multi-span small-diameter hole comprises the following steps:
step one, a front end hole 1 is machined, and a front end hole 1 is machined by using a front end hole 1 cutter; as shown in fig. 5, 6 and 7, the front end hole 1 processing procedure sequentially includes drilling, reaming and reaming, specifically, drilling the front end hole 1 by using a twist drill; replacing the twist drill with a hole expanding drill to complete hole expanding processing of the front end hole 1; the reaming process flow is completed by replacing a reamer, and the roughness of the front end hole 1 is reduced;
step two, as shown in fig. 2, a universal tool shank 21 provided with a drilling tool penetrates through the front end hole 1, and a tool bit of the drilling tool drills a tail end hole; the front end hole 1 is used for processing a tail end hole to be fixed, and drilling of a rear end coaxial hole is completed;
step three, as shown in fig. 3, a special tool holder 22 provided with a reamer penetrates through the front end hole 1, a support ring 23 matched with the front end hole 1 is mounted on the special tool holder 22, and an oil supply device capable of forming a dynamic pressure oil film between the support ring 23 and the front end hole 1 is arranged between the support ring 23 and the special tool holder 22; the front end hole 1 is matched with the support ring 23 for coaxial positioning to ensure the coaxiality requirement of the tail end hole and the front end hole 1, and the cutter head of the reamer is used for reaming the tail end hole;
step four, as shown in fig. 4, the special tool shank 22 provided with the reaming tool penetrates through the front end hole 1, the support ring 23 on the special tool shank 22 is matched with the front end hole 1, coaxial positioning is performed by utilizing the matching of the front end hole 1 and the support ring 23 so as to ensure the coaxiality requirement of the tail end hole and the front end hole 1, and the reaming tool bit reams the tail end hole.
The oil supply device comprises an oil duct 31 which is arranged in the special tool holder 23 and connected with an oil circuit system of the drilling machine, a plurality of oil through holes 32 communicated with the oil duct 31 are circumferentially distributed on the support ring 23, and a plurality of oil supply holes 33 which are in one-to-one correspondence with the oil through holes 32 are formed in the circumferential surface of the support ring 23. The special tool handle 22 is provided with a plurality of oil passing holes 34 which are communicated with the oil passing holes 32 and the oil passages 31, and the oil passing holes 34 correspond to the oil passing holes 32 one to one.
The method for processing the coaxiality of the multi-span small-diameter hole utilizes the processed front end hole 1 as a coaxial positioning reference for processing the tail end hole, can ensure the coaxiality of the front end hole 1 and the tail end hole, and the support ring 23 is matched with the front end hole 1, has the function of reducing friction force, and avoids abrasion damage to the front end hole 1 caused by the rotation of the special tool handle 22 in the tail end hole processing process.
In the processing method, a high-rigidity cutter is selected for carrying out high-precision boring processing on the elongated hole, the cutter is provided with an ultralong high-rigidity cutter handle, and the length-diameter ratio of the length of the selected high-rigidity cutter to the diameter of the machinable elongated hole is more than twelve; in the boring processing of the multi-span small-diameter hole with large slenderness, the processed hole is used as a support to carry out secondary-guiding fine drilling and reaming, the traditional slender hole processing method is changed, the technical requirement of multi-hole coaxiality is met, and the obvious beneficial technical effect is obtained. The technical scheme relates to the processing of multi-span small holes, fills a gap in the field of porous coaxiality processing in China, and reaches the international leading level.
The technical scheme has the following characteristics:
1. the method for processing the coaxiality of the multi-span small-diameter hole is characterized in that a guide sleeve is not used for processing a long and thin hole in a large span, a processed front end hole 1 is used as a support, and the front end hole 1 finely processed in the previous step is used as a guiding and positioning reference for the next process.
2. Two rolling support rings 23 are arranged on a special tool holder 22 of the tool, and the support rings 23 are matched with holes finished in the previous process to play a role in positioning and guiding; the special tool holder 22 has a long length from the tail end to the support ring 23, the special tool holder 22 has certain rigidity, and due to the combined action of the support ring 23 and the long special tool holder 22, the problem of over-positioning of the machine body is solved.
3. Four oil through holes 32 are uniformly distributed in the support ring 23, oil is supplied through the oil through holes 32, and in the guiding process of the support ring 23, oil rotates along with the support ring to form a bearing dynamic pressure oil film on the outer surface of the support ring 23, so that direct contact with a finished hole is prevented, abrasion to the finished hole is reduced, and the machining precision is improved.
4. By using the multi-span small-diameter hole machining process, the machined primary bottom hole is used as a reference (namely the front end hole 1 is used as the reference), the support ring 23 is used for supporting, radial component force is avoided, reaming deviation is reduced, the requirement of high coaxiality performance can be met, the machining efficiency of the multi-span small-diameter hole is greatly improved in actual operation, and the technical requirement of hole machining is met.
As shown in fig. 5, 6 and 7, three machining processes of drilling, reaming and reaming the front end hole 1 are respectively performed by using a front end hole drilling cutter, a front end hole reaming cutter and a front end hole reaming cutter, and the front end hole 1 is subjected to finish machining so as to have sufficiently high machining accuracy as a positioning guide reference in the next machining process.
As shown in fig. 2, the center of the distal hole is fixed by the distal hole drilling tool through the machined distal hole 1, and the distal hole is roughly machined.
As shown in fig. 3, the hole-expanding machining of the distal end hole is completed using the distal end hole-expanding cutter using the machined distal end hole 1 as a positioning guide reference. In the reaming process, two rolling support rings 23 are arranged on the special tool holder 22 of the hole reamer at the tail end, the rolling support rings 23 are fixedly connected with the special tool holder 22, and the rolling support rings 23 are matched with the front end hole 1 to play a role in positioning and guiding, so that the secondary guiding reaming process is completed.
As shown in fig. 4, the reaming of the end hole is completed using the end hole reamer using the machined front end hole 1 as a positioning guide reference. In the reaming process, two rolling support rings 23 are arranged on the special tool handle 22 of the reaming tool for the end hole, the rolling support rings 23 are fixedly connected with the special tool handle 22, and the rolling support rings 23 are matched with the front end hole 1 to play a role in positioning and guiding so as to complete the machining process of secondary guiding reaming.
As shown in fig. 1, the rolling support ring 23 is arranged on the special tool holder 22 of the hole expanding/reaming tool at the end, four oil through holes 32 are radially and uniformly distributed on the rolling support ring 23, in the processes of secondary guide reaming and secondary guide reaming, pressure oil in the oil passage 31 flows into the oil supply port through the oil through holes 32, the pressure oil is stored at the oil supply port, and in the process that the rolling support ring 23 rolls along with the special tool holder 22, a dynamic pressure oil film is formed between the rolling support ring 23 and the front end hole 1, so that the purpose of guiding and positioning by using the front end hole 1 is achieved, the friction between the rolling support ring 23 and the front end hole 1 is reduced to the maximum extent, and the requirement of coaxiality of the multi-span small-diameter hole is ensured.
The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The multi-span minor diameter hole coaxiality machining device is characterized by comprising a special tool handle for installing a reamer and a reaming tool, wherein a support ring matched with a pre-machined front end hole is installed on the special tool handle, an oil supply device capable of forming a dynamic pressure oil film between the support ring and the front end hole is arranged between the support ring and the special tool handle, the oil supply device comprises an oil channel which is arranged in the special tool handle and connected with an oil circuit system of a drilling machine, a plurality of oil through holes communicated with the oil channel are circumferentially distributed on the support ring, and a plurality of oil supply holes in one-to-one correspondence with the oil through holes are formed in the circumferential surface of the support ring.
2. The multi-span small-diameter hole coaxiality machining device according to claim 1, wherein a plurality of oil passing holes communicating the oil passing holes and the oil passages are formed in the special cutter handle, and the oil passing holes correspond to the oil passing holes one to one.
3. The multi-span small-diameter hole coaxiality machining device according to claim 1, wherein three or four oil through holes are circumferentially distributed in the support ring.
4. The multi-span small-diameter hole coaxiality machining device according to claim 2, wherein the oil passage extends axially in the special shank, and the oil passing hole extends radially in the special shank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020114954.6U CN211889702U (en) | 2020-01-17 | 2020-01-17 | Multi-span minor diameter hole coaxiality machining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020114954.6U CN211889702U (en) | 2020-01-17 | 2020-01-17 | Multi-span minor diameter hole coaxiality machining device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211889702U true CN211889702U (en) | 2020-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020114954.6U Active CN211889702U (en) | 2020-01-17 | 2020-01-17 | Multi-span minor diameter hole coaxiality machining device |
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|---|---|
| CN (1) | CN211889702U (en) |
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- 2020-01-17 CN CN202020114954.6U patent/CN211889702U/en active Active
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