CN114309788A - Composite board broach - Google Patents
Composite board broach Download PDFInfo
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- CN114309788A CN114309788A CN202111546158.5A CN202111546158A CN114309788A CN 114309788 A CN114309788 A CN 114309788A CN 202111546158 A CN202111546158 A CN 202111546158A CN 114309788 A CN114309788 A CN 114309788A
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- Prior art keywords
- broach
- lateral
- rod
- side direction
- adjusting
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- 239000002131 composite material Substances 0.000 title claims abstract description 31
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- 230000017525 heat dissipation Effects 0.000 claims abstract description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 9
- 230000033228 biological regulation Effects 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 6
- 210000003781 tooth socket Anatomy 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000006185 dispersion Substances 0.000 abstract description 4
- 238000003754 machining Methods 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 239000002360 explosive Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000013329 compounding Methods 0.000 description 4
- 239000002905 metal composite material Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000007306 functionalization reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The invention relates to the technical field of composite board processing and production, in particular to a composite board broach which comprises an external broach rod and an electric centrifugal fan. The composite plate broach disclosed by the invention consists of the broach rod outside the hollow structure and the height-adjustable inner adjusting rod arranged inside the broach rod, and the height adjustment of the inner adjusting rod can be rapidly controlled through the lateral longitudinal adjusting rod, so that the structure of the composite plate broach is adjustable, and the application range is wider; a lateral mounting seat and a lateral external thread assembling cover for mounting the electric centrifugal fan are fixed at the top end of the outer side of the external broach rod through threads, so that the internal structure of the electric centrifugal fan is simple and convenient to disassemble, and the later-stage use cost is reduced; utilize quick forced air cooling heat dissipation can promote the heat dispersion of broach greatly, prolong its life, the arc wind-guiding radiating groove of seting up on the cooperation telescopic hole medial surface simultaneously can blow away the metal debris of cutting position fast to promote the planarization of cutting plane, promote machining efficiency.
Description
Technical Field
The invention relates to the technical field of composite board processing and production, in particular to a composite board broach.
Background
The composite board has a board formed by layering different materials with different functions. Such as concrete for roofing, foam insulation and surface waterproofing. The sandwich board is also one of the composite boards, and another metal board is covered on one metal board, so that the effects of saving resources and reducing cost are achieved on the premise of not reducing the using effect (corrosion resistance, mechanical strength and the like). The compounding method generally includes an explosion compounding method, an explosion rolling compounding method, a rolling compounding method, and the like. Composite materials can be classified into composite plates, composite tubes, composite rods, and the like. The method is mainly applied to the industries of corrosion prevention, pressure vessel manufacturing, electric construction, petrifaction, medicine, light industry, automobile and the like.
The explosive cladding method comprises the following processes: the prepared composite plate is placed on a substrate, then a layer of explosive is laid on the composite plate, and the solid-state metallurgical bonding between the metal layers can be realized by utilizing the instantaneous ultrahigh pressure and ultrahigh speed impact generated during explosive explosion.
The process advantages of the explosive cladding method are: firstly, the combination of metals with very different material properties can be realized; the generation of brittle intermetallic compounds can be avoided; the flexibility is strong, and the composition of various special-shaped pieces can be realized; the composite material has high bonding strength and is suitable for most plastic metals or alloys. At present, 340 kinds of metal or alloy combination are verified to be weldable, no matter the material is deformed or cast, plane and cylinder surfaces in any planning shape can be subjected to explosive welding in any heat treatment state, and the explosive welding technology is a unique welding method for large-area surface connection of metal to some extent, namely, aluminum (660 ℃) and tantalum (2996 ℃) with large difference in melting points; titanium and stainless steel having a large difference in thermal expansion coefficient; welding can be achieved by using (HB is 4-6) and steel (HB is 50) with large hardness difference.
The metal composite material technology can give play to the respective advantages of the component materials, realize the optimal allocation of the component material resources, save precious metal materials, realize the performance requirements which can not be met by single metal, can replace the import and fill the domestic blank, has wide application range, good economic and social benefits and is easy to obtain the support and help of the aspects.
Due to the performance functionalization of the heterogeneous metal composite material, the low cost and the wide application range, the development potential of the traditional metal composite material is improved. Along with the enhancement of the implementation strength of the national environmental protection industrial policy, the application of the rare metal composite material in the electric power flue gas desulfurization equipment is continuously increased, meanwhile, the degree of the investment localization of the chemical industry is greatly accelerated, and a good development opportunity is provided for the development of the rare metal material.
Need use the broach in composite sheet processing production process, and traditional broach simple structure, inner structure can't be adjusted, leads to the use limitation great, and in the course of working, the broach can produce a large amount of heats moreover, can only rely on self heat conduction to dispel the heat, and heat dispersion very limits.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to solve the problems existing in the background technology, the improved composite plate broach is provided, and the problems that the traditional broach is simple in structure, the internal structure cannot be adjusted, the use limitation is large, heat can be dissipated only by self heat conduction, and the heat dissipation performance is very limited are solved.
The technical scheme adopted by the invention for solving the technical problems is as follows: a composite board broach comprises an external broach rod and an electric centrifugal fan, wherein the external broach rod is of a hollow structure, a height-adjustable internal adjusting rod is arranged inside the external broach rod, the upper end and the lower end of the internal adjusting rod are respectively provided with an integrated structure blade block protruding outwards, telescopic holes matched with the blade block are symmetrically formed in the upper surface and the lower surface of the external broach rod, a plurality of longitudinal adjusting grooves are symmetrically formed in the inner walls of the two sides of the external broach rod, longitudinal adjusting rods are movably assembled inside the longitudinal adjusting grooves, lateral adjusting openings are formed in the outer side surfaces of the external broach rod, the lateral adjusting rods are located in the lateral adjusting openings and provided with integrated structure lateral adjusting shifting pieces, and longitudinal adjusting tooth grooves are formed in the outer side surfaces of the internal adjusting rods corresponding to the longitudinal adjusting rod, the outer side surface of the longitudinal adjusting rod is meshed with the longitudinal adjusting tooth socket, an internal thread assembling through hole is formed in the top end of the outer side of the outer broach rod, and a lateral installing seat used for installing an electric centrifugal fan is fixed to the top end of the outer side of the outer broach rod through the internal thread assembling through hole in a threaded mode.
The lateral installation seat is characterized in that a lateral air suction opening is formed in the center of the outer side face of the lateral installation seat, and a lateral metal filter screen is fixedly connected inside the lateral air suction opening.
Outside broach pole keep away from internal thread assembly through-hole top and seted up side direction internal thread loading and unloading hole, side direction external thread loading and unloading hole outside open position seted up the side and moved down the counter bore, the inside threaded connection of side direction internal thread loading and unloading hole have side direction external thread assembly lid, side direction external thread assembly lid through inboard body structure external screw thread pipe screw in side direction internal thread loading and unloading downthehole portion and outside broach pole screw thread fixed connection, side direction external thread assembly lid outside central point put the side direction hole of airing exhaust of seting up built-in inside metal filter screen.
The internal portion of external screw thread install side direction extrusion stabilizing block through spring elasticity, the nearly inside regulation pole top position of side direction extrusion stabilizing block seted up the side direction pilot hole, inside adjust the pole top insert the inside and side direction extrusion stabilizing block fixed connection of side direction pilot hole.
The outer side surface of the external broach rod is positioned at the upper end and the lower end of the lateral adjusting opening and is provided with an arc-shaped lateral protective cover protruding outwards, and lateral positioning grooves with built-in positioning blocks are formed in two sides of the proximal adjusting opening surface of the arc-shaped lateral protective cover.
And the inner side surface of the telescopic hole is provided with an arc-shaped air guide heat dissipation groove.
The invention has the beneficial effects that:
(1) the composite plate broach disclosed by the invention consists of the broach rod outside the hollow structure and the height-adjustable inner adjusting rod arranged inside the broach rod, and the height adjustment of the inner adjusting rod can be rapidly controlled through the lateral longitudinal adjusting rod, so that the structure of the composite plate broach is adjustable, and the application range is wider;
(2) a lateral mounting seat and a lateral external thread assembling cover for mounting the electric centrifugal fan are fixed at the top end of the outer side of the external broach rod through threads, so that the internal structure of the electric centrifugal fan is simple and convenient to disassemble, and the later-stage use cost is reduced;
(3) the utilization is at the inside electronic centrifugal fan that sets up of side direction mount pad, can utilize quick air-cooled heat dissipation to promote the heat dispersion of broach greatly with outside cold air suction outside broach pole, prolongs its life, and the arc wind-guiding radiating groove of seting up on the cooperation telescopic hole medial surface simultaneously can blow off the metal piece of cutting position fast to promote the planarization of cutting plane, promote machining efficiency.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an internal cross-sectional view of the present invention.
FIG. 3 is a partial cross-sectional view of the mounting end of the laterally externally threaded mounting cap of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
The composite board broach shown in fig. 1, 2 and 3 comprises an external broach rod 1 and an electric centrifugal fan 2, wherein the external broach rod 1 is of a hollow structure, a height-adjustable internal adjusting rod 3 is arranged inside the external broach rod 1, the upper end and the lower end of the internal adjusting rod 3 are respectively provided with an integrated structure blade block 4 protruding outwards, telescopic holes 5 matched with the blade blocks 4 are symmetrically formed in the upper surface and the lower surface of the external broach rod 1, 3 longitudinal adjusting grooves 6 are symmetrically formed in the inner walls of the two sides of the external broach rod 1, a longitudinal adjusting rod 7 is movably assembled inside the longitudinal adjusting groove 6, a lateral adjusting opening 8 is formed in the outer side surface of the external broach rod 1, a lateral adjusting shifting piece 9 of an integrated structure is arranged inside the lateral adjusting opening 8, and a longitudinal adjusting tooth groove 10 is formed in the outer side surface of the internal adjusting rod 3 corresponding to the position of the longitudinal adjusting rod 7, longitudinal regulation pole 7 lateral surface with indulge and put regulation tooth's socket 10 intermeshing, internal thread assembly through-hole has been seted up on 1 outside top of outside broach pole, 1 outside top of outside broach pole has the side direction mount pad 12 that is used for installing electronic centrifugal fan 2 through internal thread assembly through-hole threaded fixation, side direction mount pad 12 can adopt long hose or long hard tube to be connected with outside broach pole 1, also can adopt quick detach structure to connect, use during convenient processing production, furtherly, in order to promote the filtering quality of air inlet position, side direction suction opening 13 has been seted up to 12 lateral surface central points of side direction mount pad, the inside fixedly connected with side metal filter screen of side direction suction opening 13.
Further, in order to cooperate with the outer side loading and unloading, the external broach rod 1 is far away from the top end of the internal thread assembly through hole and is provided with a lateral internal thread loading and unloading hole, the lateral downward counter bore is provided at the opening position outside the lateral external thread loading and unloading hole, the lateral external thread loading and unloading hole and the lateral sunken hole are respectively arranged at two sides of the external broach rod, the internal thread of the lateral internal thread loading and unloading hole is connected with a lateral external thread assembly cover 14, the lateral external thread assembly cover 14 is fixedly connected with the external broach rod 1 through the internal side integrated structure external thread pipe screwed in the lateral internal thread loading and unloading hole, and the lateral air exhaust hole 15 with an internal metal filter screen is provided at the central position outside the lateral external thread assembly cover 14. The mounting means of side direction mount pad 12 is the same with the mounting means of side direction external screw thread assembly lid 14, furtherly, in order to promote stability through elasticity restoration, there is side direction extrusion stabilizing block 16 inside the external screw thread pipe through spring elastic mounting, the side direction pilot hole has been seted up to the 3 top positions of the nearly inside regulation pole of side direction extrusion stabilizing block 16, inside 3 tops of adjusting the pole insert the inside and 16 fixed connection of side direction pilot hole with side direction extrusion stabilizing block, then also have this side direction stabilizing block 16 through spring elastic mounting inside the external screw thread pipe of side direction mount pad 12 assembly end.
Further, in order to improve the safety of the lateral adjusting mechanism and the stability after adjustment, the outer side surface of the external broach rod 1 is positioned on the lateral adjusting port 8, the lower end of the lateral adjusting port is provided with an arc lateral protective cover 17 protruding outwards, lateral positioning grooves with built-in positioning blocks 18 are formed in two sides of the lateral adjusting port surface of the arc lateral protective cover 17, and further, in order to match the outer side for air exhaust, an arc air guide heat dissipation groove 19 is formed in the inner side surface of the telescopic hole 5.
The composite plate broach disclosed by the invention consists of a hollow structure external broach rod 1 and a height adjustable internal adjusting rod 3 arranged in the hollow structure external broach rod, and the height adjustment of the internal adjusting rod 3 can be rapidly controlled through a lateral longitudinal adjusting rod 7, so that the composite plate broach is adjustable in structure and wider in application range; a lateral mounting seat 12 and a lateral external thread assembling cover 14 for mounting an electric centrifugal fan 11 are fixed at the top end of the outer side of the outer broach rod 1 through threads, so that the inner structure of the electric centrifugal fan is simple and convenient to disassemble, and the later use cost is reduced; the utilization is at the inside electronic centrifugal fan 11 that sets up of side direction mount pad 12, can utilize quick forced air cooling heat dissipation can promote the heat dispersion of broach greatly with outside cold air suction outside broach pole 1, prolongs its life, cooperates the arc wind-guiding radiating groove 19 of seting up on the flexible downthehole side simultaneously, can blow off the metal piece of cutting position fast to promote the planarization of cutting plane, promote machining efficiency.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. The utility model provides a composite sheet broach, includes outside broach pole (1) and electronic centrifugal fan (2), characterized by: the outer broach rod (1) is of a hollow structure, an inner adjusting rod (3) with an adjustable height is arranged inside the outer broach rod (1), the upper end and the lower end of the inner adjusting rod (3) are provided with an outwardly convex integral structure blade block (4), the upper surface and the lower surface of the outer broach rod (1) are symmetrically provided with telescopic holes (5) matched with the blade block (4), the inner walls of the two sides of the outer broach rod (1) are symmetrically provided with a plurality of longitudinal adjusting grooves (6), the inner parts of the longitudinal adjusting grooves (6) are movably provided with longitudinal adjusting rods (7), the outer lateral surface of the outer broach rod (1) is positioned outside the longitudinal adjusting grooves (6) and is provided with lateral adjusting openings (8), the outer lateral surface of the longitudinal adjusting rods (7) is positioned inside the lateral adjusting openings (8) and is provided with an integral structure lateral adjusting shifting sheet (9), the outer side surface of the inner adjusting rod (3) is provided with a longitudinal adjusting tooth socket (10) corresponding to the position of the longitudinal adjusting rod (7), and the top end of the outer side of the outer broach rod (1) is fixed with a lateral mounting seat (12) for mounting the electric centrifugal fan (2).
2. The composite board broach according to claim 1, characterized in that: lateral air suction openings (13) are formed in the center of the outer side faces of the lateral mounting seats (12), and lateral metal filter screens are fixedly connected inside the lateral air suction openings (13).
3. The composite board broach according to claim 1, characterized in that: outside broach pole (1) keep away from internal thread assembly through-hole top and seted up side direction internal thread loading and unloading hole, side direction external thread loading and unloading hole outside open position seted up side direction counter bore down, side direction internal thread loading and unloading downthehole internal thread be connected with side direction external thread assembly lid (14), side direction external thread assembly lid (14) through inboard body structure external screw thread pipe screw in side direction internal thread loading and unloading downthehole portion and outside broach pole (1) thread fixed connection, side direction external thread assembly lid (14) outside central point put the side direction hole (15) of airing exhaust of seting up built-in inside metal filter screen.
4. The composite board broach according to claim 3, characterized in that: the utility model discloses an internal regulation pole of external screw thread, including external screw thread inside install side direction extrusion stabilizing block (16) through spring elasticity, side direction extrusion stabilizing block (16) nearly inside regulation pole (3) top position seted up the side direction pilot hole, inside regulation pole (3) top insert inside and the side direction extrusion stabilizing block (16) fixed connection of side direction pilot hole.
5. The composite board broach according to claim 1, characterized in that: the outer side surface of the outer broach rod (1) is positioned at the upper end and the lower end of the lateral adjusting opening (8) and is provided with an arc-shaped lateral protective cover (17) protruding outwards, and lateral positioning grooves with built-in positioning blocks (18) are formed in the two sides of the surface of the lateral adjusting opening (8) close to the arc-shaped lateral protective cover (17).
6. The composite board broach according to claim 1, characterized in that: and the inner side surface of the telescopic hole (5) is provided with an arc-shaped air guide heat dissipation groove (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111546158.5A CN114309788B (en) | 2021-12-16 | 2021-12-16 | Composite board broach |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111546158.5A CN114309788B (en) | 2021-12-16 | 2021-12-16 | Composite board broach |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114309788A true CN114309788A (en) | 2022-04-12 |
| CN114309788B CN114309788B (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111546158.5A Active CN114309788B (en) | 2021-12-16 | 2021-12-16 | Composite board broach |
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| Country | Link |
|---|---|
| CN (1) | CN114309788B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB624202A (en) * | 1946-07-06 | 1949-05-30 | Nellie May Gottschalt | Expansible broach |
| CN203448764U (en) * | 2013-09-16 | 2014-02-26 | 重庆工具厂有限责任公司 | Inserted tooth broach capable of adjusting insertion depth |
| CN205764180U (en) * | 2016-07-01 | 2016-12-07 | 陕西理工大学 | Combined flat surface broaching tool |
| CN207479728U (en) * | 2017-11-01 | 2018-06-12 | 上海源升机电有限公司 | A kind of Adjustable tool apron for automotive brake stent broaching cutters |
| CN208304018U (en) * | 2018-05-14 | 2019-01-01 | 太原普洛斯数控刀具有限公司 | It is a kind of convenient for the numerical control processing of high efficiency and heat radiation and easy ash disposal plate broaching tool |
| CN210937411U (en) * | 2019-11-01 | 2020-07-07 | 汉中市智海精密机械工具有限责任公司 | Forming broach structure |
| CN214640644U (en) * | 2021-05-08 | 2021-11-09 | 重庆市鱼轻机械工具制造有限公司 | Broach with adjustable cutting teeth |
-
2021
- 2021-12-16 CN CN202111546158.5A patent/CN114309788B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB624202A (en) * | 1946-07-06 | 1949-05-30 | Nellie May Gottschalt | Expansible broach |
| CN203448764U (en) * | 2013-09-16 | 2014-02-26 | 重庆工具厂有限责任公司 | Inserted tooth broach capable of adjusting insertion depth |
| CN205764180U (en) * | 2016-07-01 | 2016-12-07 | 陕西理工大学 | Combined flat surface broaching tool |
| CN207479728U (en) * | 2017-11-01 | 2018-06-12 | 上海源升机电有限公司 | A kind of Adjustable tool apron for automotive brake stent broaching cutters |
| CN208304018U (en) * | 2018-05-14 | 2019-01-01 | 太原普洛斯数控刀具有限公司 | It is a kind of convenient for the numerical control processing of high efficiency and heat radiation and easy ash disposal plate broaching tool |
| CN210937411U (en) * | 2019-11-01 | 2020-07-07 | 汉中市智海精密机械工具有限责任公司 | Forming broach structure |
| CN214640644U (en) * | 2021-05-08 | 2021-11-09 | 重庆市鱼轻机械工具制造有限公司 | Broach with adjustable cutting teeth |
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| CN114309788B (en) | 2024-01-23 |
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