CN210996539U - Special combined guide bar boring cutter for high-precision blind hole with replaceable blade - Google Patents
Special combined guide bar boring cutter for high-precision blind hole with replaceable blade Download PDFInfo
- Publication number
- CN210996539U CN210996539U CN201921813338.3U CN201921813338U CN210996539U CN 210996539 U CN210996539 U CN 210996539U CN 201921813338 U CN201921813338 U CN 201921813338U CN 210996539 U CN210996539 U CN 210996539U
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- Prior art keywords
- blade
- cutter body
- connecting block
- screw
- blind hole
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- Expired - Fee Related
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- 230000006835 compression Effects 0.000 claims abstract description 18
- 238000007906 compression Methods 0.000 claims abstract description 18
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 229910045601 alloy Inorganic materials 0.000 claims description 14
- 239000000956 alloy Substances 0.000 claims description 14
- 230000008859 change Effects 0.000 abstract description 6
- 238000003466 welding Methods 0.000 abstract description 3
- 238000003754 machining Methods 0.000 description 8
- 238000001816 cooling Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000005493 welding type Methods 0.000 description 1
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- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
The utility model discloses a high-precision blind hole special combined guide bar boring cutter with replaceable blades, wherein the front part of a cutter body is provided with a blade mounting groove, a blade connecting block is arranged in the blade mounting groove, and the front end of the blade connecting block is embedded with a PCD blade; the back of the blade connecting block is provided with a pressing plate, a compression screw is arranged in a screw mounting hole in the middle of the pressing plate, the head of the compression screw is in threaded connection with the cutter body, and the compression screw is in clearance fit with the screw mounting hole; the front part of the cutter body is provided with two threaded holes side by side, each threaded hole is connected with an adjusting screw, the two adjusting screws are respectively arranged in front of and behind the compression screw, and the heads of the two adjusting screws are in contact with the back of the pressure plate. The present case has abandoned traditional blade welded fastening mode, now with the blade welding on the blade connecting block, the blade connecting block passes through clamp plate and housing screw detachably and connects on the cutter body, and it is right to directly change the blade like this after PCD blade wearing and tearing, and need not wholly change the cutter body to practice thrift the cost by a wide margin.
Description
Technical Field
The utility model belongs to the cutter field especially relates to a special combination conducting bar boring cutter of removable formula high accuracy blind hole of blade.
Background
In the high-precision hole processing of the inner wall of the blind hole with the through oil passage hole and the notch, the conventional design uses a PCD (namely diamond) single-edge welding type integral guide bar boring cutter, and a PCD blade of the boring cutter is integrally welded at the front part of the front surface of a cutter body. And the back of the cutter body is provided with six alloy guide bars.
The existing boring cutter has the defects that: 1. because the precision requirement of the processed hole is very high, the requirement reaches 5-level precision (the total tolerance of the aperture is 0.008, and the cylindricity is 0.006), the internal structure of the blind hole is complex, the requirements on the service life, the stability, the rigidity and the chip removal of the tool are very high, and the existing boring tool can only reach 6-level precision and cannot guarantee the requirements on the aperture precision and the cylindricity.
2. The existing boring cutter blade is directly welded on a cutter body, the service life of the blade is shorter than 1000 pieces, the blade cannot be ground after being worn, only can be ground after changing a piece, the success rate of the grinding is low, 4 cutters can be manufactured for sample pieces, only 1 cutter can be qualified, and the cylindricity can not reach 0.006; once the tool tip of the integral tool is worn, the tool can only be integrally replaced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a removable formula high accuracy blind hole special use combination conducting bar boring cutter of blade is provided, the defect of prior art is intended to be overcome.
The technical scheme of the utility model as follows: the utility model provides a removable formula high accuracy blind hole special use combination conducting bar boring cutter of blade, includes cutter body (1), its characterized in that: the front part of the cutter body (1) is provided with a chip groove (1a), the front end part of the chip groove (1a) is provided with a blade mounting groove, a blade connecting block (2) is arranged in the blade mounting groove, and the front end of the blade connecting block (2) is embedded with a PCD blade (3); a pressing plate (4) is arranged on the back of the blade connecting block (2), a compression screw (5) is arranged in a screw mounting hole in the middle of the pressing plate, the head of the compression screw (5) is in threaded connection with the cutter body (1), and the compression screw (5) is in clearance fit with the screw mounting hole; the front part of the cutter body (1) is provided with two threaded holes side by side, each threaded hole is connected with an adjusting screw (6), the two adjusting screws (6) are respectively arranged in the front and the rear of the compression screw (5), and the heads of the two adjusting screws (6) are in contact with the back of the pressing plate (4).
The present case has abandoned traditional blade welded fastening mode, now with the blade welding on blade connecting block (2), blade connecting block (2) are connected on the cutter body through clamp plate (4) and housing screw (5) detachably, like this directly change the blade after PCD blade wearing and tearing just, and need not wholly change the cutter body to practice thrift the cost by a wide margin. Meanwhile, the two adjusting screws (6) are matched with the compression screws (5), so that the mounting position of the PCD blade can be effectively finely adjusted, the machining diameter of the hole is adjusted, and the machining precision is better guaranteed. In addition, a larger chip removal groove (the length of the chip removal groove is larger than the depth 1/3 of the blind hole) is additionally arranged, so that chips can be timely removed by the chip removal groove, and the surface roughness RZ4 of the inner wall of the blind hole is ensured.
In the scheme, three alloy guide bars (7) are fixed on the back of the front part of the cutter body (1) along the circumferential direction, and the alloy guide bars (7) are arranged along the axial direction of the cutter body (1). In the machining process, the alloy guide bars can play a supporting role, but the number of the alloy guide bars of the existing boring cutter is too large, but aluminum chips are clamped in the gaps between the guide bars and the hole wall easily due to the difficulty in chip removal of blind holes, and the inner wall of the hole is damaged by pulling, so that the number of the alloy guide bars is reduced, and an inner cooling hole is arranged beside each guide bar to ensure that the guide bars do not clamp the aluminum chips during boring machining.
In the scheme, the blade connecting block (2) is made of hard alloy.
In the scheme, the PCD blade (3) and the blade connecting block (2) are welded together.
Has the advantages that: the present case has abandoned traditional blade welded fastening mode, now with the blade welding on the blade connecting block, the blade connecting block passes through clamp plate and housing screw detachably and connects on the cutter body, and it is right to directly change the blade like this after PCD blade wearing and tearing, and need not change expensive cutter body to practice thrift the cost by a wide margin. Meanwhile, the two adjusting screws are matched with the compression screws, so that the mounting position of the PCD blade can be effectively finely adjusted, the machining diameter of the hole is adjusted, and the machining precision is better guaranteed. In addition, the chip groove is additionally arranged, chips can be timely discharged through the chip groove, and meanwhile, the number of alloy guide bars is reduced, so that the machining precision of the hole is guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a view taken along direction a of fig. 1.
Detailed Description
The invention will be further explained with reference to the following figures and examples:
as shown in fig. 1 and 2, the combined guide bar boring tool special for the high-precision blind hole with the replaceable blade comprises a tool body 1 made of alloy steel, wherein the tool body 1 can be fixed with a tool shank through four radial screws and 4 axial screws. The front part of the cutter body 1 is provided with a chip groove 1a, and the front end of the chip groove 1a is provided with a blade mounting groove. An inner cooling hole 1b is formed in the front of the chip discharge groove 1a, and the inner cooling hole 1b is used for cooling heat generated during machining and timely flushing away aluminum chips generated during boring. The blade mounting groove is internally provided with a blade connecting block 2, and the front end of the blade connecting block 2 is embedded with a PCD blade 3. The upper part of the blade connecting block 2 is provided with a pressing plate 4, and a compression screw 5 is arranged in a screw mounting hole of a countersunk head in the middle of the pressing plate 4. The head of the compression screw 5 is in threaded connection with the cutter body 1, and the compression screw 5 is in clearance fit with the screw mounting hole. The front part of the cutter body 1 is provided with two threaded holes side by side, and each threaded hole is connected with an adjusting screw 6. The two adjusting screws 6 are respectively arranged in front of and behind the compression screw 5, the heads of the two adjusting screws 6 are in contact with the back surface of the pressure plate 4, and the installation position of the PCD blade 3 can be adjusted by adjusting the adjusting screws 6 when the PCD blade is used.
Three alloy conducting bars 7 are fixed on the back of the front part of the cutter body 1 along the circumferential direction, and the alloy conducting bars 7 are arranged along the axial direction of the cutter body 1. The material of the cutter body 1 is the same as that of the existing cutter body, and the material of the blade connecting block 2 is hard alloy. The PCD insert 3 is welded with the insert connecting block 2.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. The utility model provides a removable formula high accuracy blind hole special use combination conducting bar boring cutter of blade, includes cutter body (1), its characterized in that: the front part of the cutter body (1) is provided with a chip groove (1a), the front end part of the chip groove (1a) is provided with a blade mounting groove, a blade connecting block (2) is arranged in the blade mounting groove, and the front end of the blade connecting block (2) is embedded with a PCD blade (3); a pressing plate (4) is arranged on the back of the blade connecting block (2), a compression screw (5) is arranged in a screw mounting hole in the middle of the pressing plate, the head of the compression screw (5) is in threaded connection with the cutter body (1), and the compression screw (5) is in clearance fit with the screw mounting hole; the front part of the cutter body (1) is provided with two threaded holes side by side, each threaded hole is connected with an adjusting screw (6), the two adjusting screws (6) are respectively arranged in the front and the rear of the compression screw (5), and the heads of the two adjusting screws (6) are in contact with the back of the pressing plate (4).
2. The special combined guide bar boring tool for the replaceable blade high-precision blind hole according to claim 1, wherein: three alloy conducting bars (7) are fixed on the back of the front part of the cutter body (1) along the circumferential direction, and the alloy conducting bars (7) are arranged along the axial direction of the cutter body (1).
3. The special combined guide bar boring tool for the replaceable blade high-precision blind hole according to claim 1, wherein: the blade connecting block (2) is made of hard alloy.
4. The special combined guide bar boring tool for the replaceable blade and the high-precision blind hole according to any one of claims 1 to 3, wherein: the PCD blade (3) and the blade connecting block (2) are welded together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921813338.3U CN210996539U (en) | 2019-10-25 | 2019-10-25 | Special combined guide bar boring cutter for high-precision blind hole with replaceable blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921813338.3U CN210996539U (en) | 2019-10-25 | 2019-10-25 | Special combined guide bar boring cutter for high-precision blind hole with replaceable blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210996539U true CN210996539U (en) | 2020-07-14 |
Family
ID=71505731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921813338.3U Expired - Fee Related CN210996539U (en) | 2019-10-25 | 2019-10-25 | Special combined guide bar boring cutter for high-precision blind hole with replaceable blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210996539U (en) |
-
2019
- 2019-10-25 CN CN201921813338.3U patent/CN210996539U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200714 |