CN114083002A - A weakly rigid shim for machine-clamped indexable tools - Google Patents
A weakly rigid shim for machine-clamped indexable tools Download PDFInfo
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- CN114083002A CN114083002A CN202111384898.3A CN202111384898A CN114083002A CN 114083002 A CN114083002 A CN 114083002A CN 202111384898 A CN202111384898 A CN 202111384898A CN 114083002 A CN114083002 A CN 114083002A
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- shim
- blade
- cutter
- round hole
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- 230000017105 transposition Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 238000009825 accumulation Methods 0.000 abstract 1
- 230000008602 contraction Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 15
- 239000000956 alloy Substances 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 229910001069 Ti alloy Inorganic materials 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/002—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor with vibration damping means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Accessories And Tools For Shearing Machines (AREA)
- Milling Processes (AREA)
Abstract
本发明属于金属切削加工技术领域，特别涉及一种机夹可转位刀具用弱刚性刀垫。该机夹可转位刀具用弱刚性刀垫，包括刀柄、刀垫和刀片，其特征是：所述刀垫的弹性模量为70‑510GPa，刀垫置于刀柄上，刀片置于刀垫上，刀柄、刀垫和刀片通过夹紧螺栓固定在一起，刀垫中部依次开设有大圆孔和小圆孔，刀垫与刀片接触面开设有若干深槽。本发明的有益效果是：使刀片在受到冲击时，刀垫弹性收缩降低了刀片响应应力峰值和减缓冲击力脉冲上升时间，减缓了冲击能量在刀片上的集聚和释放，从而保护刀片免于冲击断裂，降低了刀片的磨损，延长了刀具的使用寿命。
The invention belongs to the technical field of metal cutting processing, and particularly relates to a weakly rigid shim for an indexable tool with a machine clip. The machine clamps a weakly rigid shim for an indexable tool, including a shank, a shim and a blade, and is characterized in that the elastic modulus of the shim is 70-510GPa, the shim is placed on the handle, and the blade is placed on the shank. On the shim, the shank, the shim and the blade are fixed together by clamping bolts, a large round hole and a small round hole are sequentially opened in the middle of the shim, and a number of deep grooves are formed on the contact surface of the shim and the blade. The beneficial effects of the invention are: when the blade is impacted, the elastic contraction of the shim reduces the peak value of the response stress of the blade and the rise time of the impact force pulse, slows down the accumulation and release of the impact energy on the blade, thereby protecting the blade from impact Fracture, reducing blade wear and extending tool life.
Description
(I) technical field
The invention belongs to the technical field of metal cutting processing, and particularly relates to a weak-rigidity shim for a mechanically-clamped indexable cutter.
(II) background of the invention
The shim is an important part of a mechanically clamped indexable cutter and is arranged below an insert to protect a cutter body (a cutter rod) and determine the position of a cutting edge. In the process of milling or turning intermittently, due to the periodic variation of cutting thickness, the hard particles of the strengthening phase dispersed in the material, defects, the vibration of a machine tool body and the like, the cutting force fluctuates periodically or aperiodically, and force impact and thermal impact are formed on a blade (a cutter). The force and thermal shock can not only increase the abrasion of the cutter, but also easily cause sudden breakage such as edge breakage and peeling of the cutter, particularly the cutter made of brittle and hard materials such as a ceramic cutter and a CBN cutter. The toughness of the cutter material is increased through toughening and reinforcing measures, so that the impact damage resistance of the blade can be improved. But the strength/hardness and toughness of the tool material are contradictory, the toughness of the high strength/hardness material being lower and vice versa. Such as ceramic and CBN tools, are harder than cemented carbide tools, but are less tough than harder alloys, making such tools impractical for use in cutting applications with high impact.
Disclosure of the invention
The invention provides a weak rigidity shim for a mechanically-clamped indexable cutter, which is used for protecting an insert from impact fracture, reducing the abrasion of the insert and prolonging the service life of the cutter in order to make up the defects of the prior art.
The invention is realized by the following technical scheme:
the utility model provides a but machine clamp transposition cutter is with weak rigidity shim, includes handle of a knife, shim and blade, characterized by: the elastic modulus of the knife pad is 70-510GPa, the knife pad is arranged on the knife handle, the blade is arranged on the knife pad, the knife handle, the knife pad and the blade are fixed together through a clamping bolt, a large round hole and a small round hole are sequentially formed in the middle of the knife pad, and a plurality of deep grooves are formed in the contact surface of the knife pad and the blade.
The elastic modulus of the shim is 70-200 GPa.
The deep groove comprises a side groove positioned at the edge of the shim and a strip groove penetrating through the center of the shim.
The size of the shim is 13 multiplied by 3.6 mm.
The diameter of the small round hole is 6mm, the diameter of the large round hole is 8mm, and the depth of the large round hole is 1.8 mm.
The width of limit groove is 2mm, and the degree of depth is 1 mm.
The depth of the strip groove is 0.5mm, and the width of the strip groove is 2-4 mm.
The invention has the beneficial effects that: when the blade is impacted, the elastic shrinkage of the knife pad reduces the response stress peak value of the blade and the rise time of the impulse of impact force, and slows down the gathering and releasing of impact energy on the blade, thereby protecting the blade from impact fracture, reducing the abrasion of the blade and prolonging the service life of the cutter.
(IV) description of the drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic top view of a shim according to embodiment 1 of the present invention;
FIG. 3 is a schematic side view of a shim according to embodiment 1 of the present invention;
FIG. 4 is a schematic top view of a shim according to embodiment 2 of the present invention;
FIG. 5 is a schematic side view of a shim according to embodiment 2 of the present invention;
FIG. 6 is a schematic top view of a shim according to embodiment 3 of the present invention;
FIG. 7 is a schematic side view of a shim according to embodiment 3 of the present invention;
FIG. 8 is a schematic top view of a shim according to embodiment 4 of the present invention;
FIG. 9 is a schematic side view of a shim according to embodiment 4 of the present invention;
FIG. 10 is a schematic view of the structure of an experimental work piece used in the present invention;
FIG. 11 is a graph showing the results of an experiment according to the present invention;
FIG. 12 is a graph showing the results of a second experiment according to the present invention;
in the figure, 1 knife handle, 2 knife pads, 3 blades, 4 clamping bolts, 5 large round holes, 6 small round holes, 7 deep grooves, 8 side grooves and 9 grooves.
(V) detailed description of the preferred embodiments
The attached drawing is an embodiment of the invention. The embodiment comprises a hilt 1, a shim 2 and a blade 3, wherein the elastic modulus of the shim 2 is 70-510GPa, the shim 2 is arranged on the hilt 1, the blade 3 is arranged on the shim 2, the hilt 1, the shim 2 and the blade 3 are fixed together through a clamping bolt 4, a large round hole 5 and a small round hole 6 are sequentially formed in the middle of the shim 2, and a plurality of deep grooves 7 are formed in the contact surface of the shim 2 and the blade 3. The elastic modulus of the shim 2 is 70-200 GPa. The deep groove 7 includes a side groove 8 at the edge of the shim 2 and a bar groove 9 extending through the center of the shim 2. The shim 2 was 13X 3.6mm in size. The diameter of the small round hole 6 is 6mm, the diameter of the large round hole 5 is 8mm, and the depth of the large round hole 5 is 1.8 mm. The width of the side groove 8 is 2mm and the depth is 1 mm. The depth of the strip groove 9 is 0.5mm, and the width is 2-4 mm.
Example 1
The contact surface of the shim 2 and the blade 3 is a plane.
Example 2
On the basis of the embodiment 1, the edge is milled inwards, the milling width is 2mm, the milling depth is 1mm, and the boss is formed after machining.
Example 3
On the basis of embodiment 2, the strip grooves 9 with the width of 2mm and the depth of 0.5mm are processed at the positions of two center lines of the boss, and the upper groove and the lower groove are symmetrical, and the left groove and the right groove are symmetrical.
Example 4
On the basis of embodiment 3, the groove depth is not changed, and the groove width is further increased from 2mm to 4 mm.
1. An N8 aluminum material with the elastic modulus E =70GPa, a TC4 titanium alloy material with the elastic modulus E =110GPa, a 08 steel material with the elastic modulus E =206GPa and a YT14 hard alloy material with the elastic modulus E =510GPa are selected as the base material of the cutter pad 2.
2. The cutter pad 2 with the structure in the embodiment 1 is processed by N8 aluminum, TC4 titanium alloy, 08 steel and YT14 hard alloy materials.
3. The machined N8 aluminum is placed under the insert 3 and assembled with the shank 1 by the clamping bolt 4.
4. Intermittent turning experiments were performed on the assembled tool. The blade 3 is a YG8 hard alloy blade, and the workpiece is 45 steel bar stock. In order to increase the impact effect, the workpiece is provided with a groove. And clamping the assembled cutter and workpiece on a lathe, wherein the rotating speed of a main shaft of the lathe is 140r/min and 180r/min, the feeding amount is 0.175mm/r, the cutting depth is 0.4mm, and the cutting length is 100 m. After the experiment, the cutter breakage was observed.
The results of the experiment are shown in FIG. 11. According to the contact stiffness formula, when the contact area is a fixed value, the contact stiffness is reduced along with the reduction of the elastic modulus of the two contact materials. In the four shim 2 materials used, the elastic moduli are ordered from large to small: the hard alloy is >08 steel > TC4> N8 aluminum, and the matrix rigidity and the contact rigidity of the hard alloy are ranked from large to small: cemented carbide >08 steel > TC4> N8 aluminium. At the spindle rotating speed of 140r/min, only the blade 3 provided with the YT14 hard alloy shim 2 is broken during cutting. When the rotating speed of the main shaft is increased to 180r/min, the impact on the blade 3 during cutting is further increased, except that the blade 3 is broken when the hard alloy blade pad 2 with higher rigidity is used, the blade 3 is also broken when the 08 steel blade pad 2 with the second rigidity is used, and the blade 3 is not broken when the TC4 and the N8 aluminum blade pad 2 with lower rigidity in the four materials are used, which further shows that the blade pad 2 with lower rigidity is favorable for prolonging the service life of the cutter.
1. The TC4 titanium alloy material was processed into the shim 2 of examples 1, 2, 3, and 4, respectively.
2. The processed TC4 titanium alloy shim 2 is placed below the blade 3 and assembled with the tool holder 1 through the clamping bolt 4.
3. Intermittent turning experiments were performed on the assembled tool. The workpiece material is the same as that of experiment one. And clamping the assembled cutter and workpiece on a lathe, wherein the rotating speed of a main shaft of the lathe is 350r/min, the feed rate is 0.175mm/r, the cutting depth is 0.4mm, and the cutting length is 100 m. After the experiment, the cutter breakage was observed.
The results of the experiment are shown in FIG. 12. According to the contact rigidity formula, the materials of the two contact objects are known, the elastic modulus is a constant value, and the contact rigidity is reduced along with the reduction of the contact area. When the cutter pad 2 with the TC4 titanium alloy cutter pad 2 as the material and four structures is used, the contact areas are sorted from large to small as follows: 1>2>3>4, the corresponding contact stiffness ordering being: 1>2>3> 4. At a spindle rotation speed of 350r/min, the cutter is broken at the blade 3 with the shim 2 of the 1, 2-type structure, but is not broken at the cutting of the blade 3 with the shim 2 of the 3, 4-type structure. The reason is that the material of the shim 2 determines the rigidity of the base body, the contact rigidity is reduced along with the reduction of the contact area, and under the impact caused by the rotation speed of 350r/min, the shim 2 with the 3-type and 4-type structure with lower shim-to-shim contact rigidity has good protection effect on the blade 3 when the blade 3 is impacted, so that the blade 3 is not easy to break.
Claims (7)
1. The utility model provides a but machine clamp transposition cutter is with weak rigidity shim, includes handle of a knife (1), shim (2) and blade (3), characterized by: the elastic modulus of the cutter pad (2) is 70-510GPa, the cutter pad (2) is arranged on the cutter handle (1), the blade (3) is arranged on the cutter pad (2), the cutter handle (1), the cutter pad (2) and the blade (3) are fixed together through a clamping bolt (4), a large round hole (5) and a small round hole (6) are sequentially formed in the middle of the cutter pad (2), and a plurality of deep grooves (7) are formed in the contact surface of the cutter pad (2) and the blade (3).
2. The mechanically clamped indexable tool weakly-rigid shim as set forth in claim 1, wherein: the elastic modulus of the shim (2) is 70-200 GPa.
3. The mechanically clamped indexable tool weakly-rigid shim as set forth in claim 1, wherein: the deep groove (7) comprises a side groove (8) positioned at the edge of the shim (2) and a strip groove (9) penetrating through the center of the shim (2).
4. The mechanically clamped indexable tool weakly-rigid shim as set forth in claim 1, wherein: the size of the shim (2) is 13 multiplied by 3.6 mm.
5. The mechanically clamped indexable tool weakly-rigid shim as set forth in claim 1, wherein: the diameter of the small round hole (6) is 6mm, the diameter of the large round hole (5) is 8mm, and the depth of the large round hole (5) is 1.8 mm.
6. The mechanically clamped indexable tool weakly-rigid shim as set forth in claim 3, wherein: the width of the side groove (8) is 2mm, and the depth is 1 mm.
7. The mechanically clamped indexable tool weakly-rigid shim as set forth in claim 3, wherein: the depth of the strip groove (9) is 0.5mm, and the width is 2-4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111384898.3A CN114083002B (en) | 2021-11-22 | 2021-11-22 | A Weakly Rigid Shim for Indexable Cutters in Machine Holders |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111384898.3A CN114083002B (en) | 2021-11-22 | 2021-11-22 | A Weakly Rigid Shim for Indexable Cutters in Machine Holders |
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| Publication Number | Publication Date |
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| CN114083002A true CN114083002A (en) | 2022-02-25 |
| CN114083002B CN114083002B (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111384898.3A Active CN114083002B (en) | 2021-11-22 | 2021-11-22 | A Weakly Rigid Shim for Indexable Cutters in Machine Holders |
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| CN (1) | CN114083002B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116833436A (en) * | 2023-09-01 | 2023-10-03 | 齐鲁工业大学(山东省科学院) | A gradient stiffness tool shim for machine-clamped indexable tools |
| CN120697201A (en) * | 2025-08-26 | 2025-09-26 | 湖南德智新材料股份有限公司 | Fixtures and processing equipment |
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| CN2060097U (en) * | 1989-12-05 | 1990-08-08 | 山东省新泰市刃具厂 | Double negative variable-position strong end mill cutter |
| JP2001096403A (en) * | 1999-09-30 | 2001-04-10 | Kyocera Corp | Cutting tools |
| CN202114310U (en) * | 2011-05-23 | 2012-01-18 | 绵阳市绵工工具有限公司 | Indexable cylindrical drill |
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| CN203863040U (en) * | 2014-05-29 | 2014-10-08 | 华南理工大学 | Indexable turning tool with variable tool cutting edge angle |
| CN205032749U (en) * | 2015-09-24 | 2016-02-17 | 湖州博得物流设备有限公司 | Carbide tool for turning |
| CN206578343U (en) * | 2017-01-13 | 2017-10-24 | 浙江亚太机电股份有限公司 | A kind of adjustable indexable side and face milling cutter of cutter blade |
| CN206632388U (en) * | 2017-04-20 | 2017-11-14 | 合肥工业大学(马鞍山)高新技术研究院 | A kind of polycrystalline diamond annular cutter of large scale hard rubber turning rubber covered rollers processing |
| CN207681658U (en) * | 2017-12-01 | 2018-08-03 | 常州蓝丁格尔工具有限公司 | A kind of mold outside threads turning insert |
| CN209886709U (en) * | 2019-05-20 | 2020-01-03 | 四川职业技术学院 | Machine presss from both sides cutter |
-
2021
- 2021-11-22 CN CN202111384898.3A patent/CN114083002B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2060097U (en) * | 1989-12-05 | 1990-08-08 | 山东省新泰市刃具厂 | Double negative variable-position strong end mill cutter |
| JP2001096403A (en) * | 1999-09-30 | 2001-04-10 | Kyocera Corp | Cutting tools |
| CN202114310U (en) * | 2011-05-23 | 2012-01-18 | 绵阳市绵工工具有限公司 | Indexable cylindrical drill |
| CN102922023A (en) * | 2012-11-12 | 2013-02-13 | 常州瑞诺切数控刀具有限公司 | Face milling cutter with indexable inserts and knife pads thereof |
| CN203863040U (en) * | 2014-05-29 | 2014-10-08 | 华南理工大学 | Indexable turning tool with variable tool cutting edge angle |
| CN205032749U (en) * | 2015-09-24 | 2016-02-17 | 湖州博得物流设备有限公司 | Carbide tool for turning |
| CN206578343U (en) * | 2017-01-13 | 2017-10-24 | 浙江亚太机电股份有限公司 | A kind of adjustable indexable side and face milling cutter of cutter blade |
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| CN207681658U (en) * | 2017-12-01 | 2018-08-03 | 常州蓝丁格尔工具有限公司 | A kind of mold outside threads turning insert |
| CN209886709U (en) * | 2019-05-20 | 2020-01-03 | 四川职业技术学院 | Machine presss from both sides cutter |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116833436A (en) * | 2023-09-01 | 2023-10-03 | 齐鲁工业大学(山东省科学院) | A gradient stiffness tool shim for machine-clamped indexable tools |
| CN116833436B (en) * | 2023-09-01 | 2023-11-03 | 齐鲁工业大学(山东省科学院) | A gradient stiffness tool shim for machine-clamped indexable tools |
| CN120697201A (en) * | 2025-08-26 | 2025-09-26 | 湖南德智新材料股份有限公司 | Fixtures and processing equipment |
| CN120697201B (en) * | 2025-08-26 | 2026-04-17 | 湖南德智新材料股份有限公司 | Fixtures and processing equipment |
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| CN114083002B (en) | 2023-01-31 |
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