CN113385962A - Finish turning cylinder body straight hole clamp - Google Patents
Finish turning cylinder body straight hole clamp Download PDFInfo
- Publication number
- CN113385962A CN113385962A CN202110779891.5A CN202110779891A CN113385962A CN 113385962 A CN113385962 A CN 113385962A CN 202110779891 A CN202110779891 A CN 202110779891A CN 113385962 A CN113385962 A CN 113385962A
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- cylinder body
- positioning
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- bolt
- hole
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- 238000012545 processing Methods 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims description 22
- 238000003754 machining Methods 0.000 abstract description 7
- 238000012797 qualification Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q2703/00—Work clamping
- B23Q2703/02—Work clamping means
- B23Q2703/10—Devices for clamping workpieces of a particular form or made from a particular material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention relates to the technical field of machining equipment, and provides a clamp for finely turning a straight hole of a cylinder body. The invention can be directly additionally arranged on a common numerical control machine tool for processing, is positioned by a step hole at the center of the cylinder body, and can be finely adjusted to an ideal verticality and low error state by four clamping pieces, namely an upper clamping piece, a lower clamping piece, a left clamping piece and a right clamping piece. The invention has high processing quality, dozens of batches of cylinder bodies are processed by a common numerical control machine tool, and the qualification rate reaches 100 percent; the processing efficiency is 3 times or more than that of the existing horizontal processing center, and the method has huge economic benefit and can be popularized and applied in large scale in industrialization.
Description
Technical Field
The invention relates to the technical field of machining equipment, in particular to a clamp for finely turning a straight hole of a cylinder body.
Background
The cylinder block is a main body of the engine, connects each cylinder and a crankcase into a whole, and is a supporting framework for mounting pistons, crankshafts, other parts and accessories. A cylinder block of an internal combustion engine is manufactured by die-casting, in which a plurality of cylinder bores are formed in a row, a water jacket is formed around the plurality of cylinder bores, and an oil passage extending in the direction in which the cylinder bores are arranged is provided below the water jacket.
The cylinder block belongs to a high-precision part and is generally processed by a horizontal processing center. After each step hole is processed, the workbench is rotated by 90 degrees and ascended by 34mm, and then the straight hole of the cylinder body is processed. If the error of the workbench rotating by 90 degrees exceeds 0.025 and the rising error exceeds 0.031, the part is rejected. Therefore, how to select a proper hole for positioning in machining of a phi 30 straight hole to ensure the verticality in machining of the straight hole and reduce the error of the center distance is an urgent problem to be solved. Moreover, the unit price of the horizontal machining center is more than 200 ten thousand, and the small-sized enterprises cannot bear the high price.
Disclosure of Invention
The invention aims to overcome at least one of the defects in the prior art and provides the finish turning cylinder body straight hole clamp which has good verticality, can reduce machining errors and has high product quality. The purpose of the invention is realized based on the following technical scheme:
the invention provides a clamp for finely turning a straight hole of a cylinder body, which comprises an upper clamping piece, a lower clamping piece, a left clamping piece, a right clamping piece, a positioning plate and an installation plate, wherein the cylinder body is fixedly installed on the positioning plate through the upper clamping piece, the lower clamping piece, the left clamping piece and the right clamping piece; the lower end face of the cylinder body is arranged on the positioning plate, the upper clamping piece is used for extending into the upper end face of the cylinder body and fixing the cylinder body, the upper clamping piece comprises a first nut, a first bolt and a pressing piece, a second positioning hole is formed in the center of the pressing piece, a first positioning hole is formed in the corresponding position of the positioning plate, the bottom face of the pressing piece is abutted to the upper end face of the cylinder body, the first bolt penetrates through the second positioning hole, a step hole in the center of the cylinder body and the first positioning hole to expose the lower end of the positioning plate, the first nut is used for being matched with the first bolt to press the pressing piece, the lower clamping piece comprises a second nut and a first bolt, and when the first nut and the second nut are rotated, the first bolt, the pressing piece and the positioning plate can be matched with the lower end face of the cylinder body to press the lower end face of the cylinder body, so that the cylinder body is positioned and fixed in the vertical direction; left side clamping piece and cylinder body rear end face butt, it includes locating pin and cotter way, be equipped with the third locating hole on the locating plate relevant position, the locating pin passes cotter way and gets into locking in the third locating hole, right side clamping piece includes reference column and first hexagon head bolt, first hexagon head bolt includes hexagon head and second bolt, the reference column is located perpendicularly on the locating plate, the second bolt passes reference column and cylinder body right-hand member face butt, and is as the rotation the hexagon head can drive the second bolt translation left and extrude the cylinder body jointly with left clamping piece to fix the cylinder body horizontal direction location.
Preferably, a jackscrew is coaxially arranged between the hexagon head bolt and the cylinder body.
Preferably, the positioning column is in an inverted T shape.
Preferably, the positioning column is connected with the positioning plate through bolts, and the bolt connection comprises bolt holes arranged on two sides of the first hexagon head bolt and a second hexagon head bolt matched with the bolt holes.
Preferably, a first top plate is arranged between the first nut and the pressing piece, and/or a second top plate is arranged between the second nut and the positioning plate.
Preferably, the pressing piece is provided with a positioning sleeve at the center inside, and the inner diameter of the positioning sleeve is matched with the maximum outer diameter of the first bolt.
Preferably, the left clamping piece is provided with 2-3, and is located the upper and lower side of cylinder body rear end face respectively when being provided with 2, and is located the upper and middle lower side of cylinder body rear end face respectively when being provided with 3.
Preferably, the positioning plate is connected with the mounting plate through bolts.
Preferably, the positioning plate is further provided with a plurality of positioning blocks, the positioning blocks are arranged inside or outside the lower end face of the cylinder body, and the positioning blocks are used for being matched with the side edge of the lower end face of the cylinder body to realize positioning on the horizontal plane of the cylinder body.
Preferably, the positioning blocks are arranged at four corners inside the lower end face of the cylinder body, or at the central positions of four sides of the lower end face of the cylinder body, or at the central positions of a front side and a back side of the lower end face of the cylinder body.
The invention can obtain at least one of the following beneficial effects:
the clamp can be directly additionally arranged on a common numerical control machine tool for processing, is positioned by a step hole in the center of the cylinder body, and can be finely adjusted to an ideal verticality and low error state by four clamping pieces, namely an upper clamping piece, a lower clamping piece, a left clamping piece and a right clamping piece. Once the positioning state is determined, the perpendicularity and center distance errors of all subsequent cylinder body straight holes are almost zero, and the processing quality is high; by adopting the clamp provided by the invention, tens of batches of cylinder bodies are processed by using a common numerical control machine tool, and the qualification rate reaches 100%. The unit price of a common numerical control machine tool is about 10 ten thousand yuan, the price is low, the machining efficiency of the common numerical control machine tool is 3 times or more than that of the existing horizontal machining center, and the common numerical control machine tool has great economic benefit. The invention has very wide popularization value and can be popularized and applied in large scale in industrialization.
Drawings
FIG. 1 is a front view of a fine turning cylinder straight hole clamp according to a preferred embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a jig for precisely turning a straight hole of a cylinder according to a preferred embodiment of the present invention;
FIG. 3 is a left side view of the structure of a jig for precisely turning straight holes of a cylinder according to a preferred embodiment of the present invention;
FIG. 4 is a front view of another jig for precisely turning straight bores of cylinder blocks according to the preferred embodiment of the present invention;
FIG. 5 is a top view of the cylinder structure;
FIG. 6 is a schematic diagram of the AA side of FIG. 5;
fig. 7 (1) is a left side view of the cylinder structure; (2) is a rear view of the cylinder body structure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The structure of the cylinder body is shown in fig. 5-7, wherein step holes 78 are arranged through the upper end face 71 and the lower end face 72 of the cylinder body, and the number of the step holes is 3; a straight bore 77 is provided through the front 73 and rear 74 end surfaces of the cylinder.
As shown in fig. 1 to 4, a preferred embodiment of the present invention provides a clamp for finely turning a cylinder straight hole, which includes an upper clamping member 1, a lower clamping member 2, a left clamping member 3, a right clamping member 4, a positioning plate 5 and a mounting plate 6, wherein a cylinder 7 is fixedly mounted on the positioning plate 5 through the upper clamping member 1, the lower clamping member 2, the left clamping member 3 and the right clamping member 4. Wherein, the lower end of the positioning plate 5 is provided with a vertical plate 17 for vertically arranging the positioning plate 5 on the mounting plate 6 so as to position the cylinder body 7 for processing. Riser 17 and mounting panel 6 can be connected through a plurality of bolts 19, easy to assemble and dismantlement still are equipped with a plurality of and 5 vertically strengthening ribs 18 of locating plate on the preferred riser 17 for the auxiliary stay locating plate 5 and strengthen the riser 17 and the riser 17 be connected, improve the installation stability of whole anchor clamps on mounting panel 6.
Wherein, the lower end surface 72 of the cylinder 7 is arranged on the positioning plate 5, and the upper clamping piece 1 is used for extending into the upper end surface 71 of the cylinder 7 and fixing the same. The upper clamping part 1 comprises a first nut 11, a first bolt 12 and a pressing part 13, a second positioning hole 15 is formed in the center of the pressing part 13, a first positioning hole 51 is formed in the corresponding position of the positioning plate 5, the bottom surface of the pressing part 13 is abutted to the upper end face 71 of the cylinder body 7, the first bolt 12 penetrates through the second positioning hole 15, a step hole 78 in the center of the cylinder body 7 and the first positioning hole 51 to expose the lower end of the positioning plate 5, and the first nut 11 is used for being matched with the first bolt 12 to press the pressing part 13 tightly. The lower clamping piece 2 comprises a second nut 21 and a first bolt 12, and when the first nut 11 and the second nut 21 are rotated, the lower end surface 72 of the cylinder body 7 can be pressed by matching with the first bolt 12, the pressing piece 13 and the positioning plate 5, so that the cylinder body 7 is positioned and fixed in the vertical direction. Left clamping piece 3 and cylinder body 7 rear end face 76 butt, it includes locating pin 31 and keyway 32, is equipped with third locating hole 52 on the locating plate 5 relevant position, and locating pin 31 passes keyway 32 and gets into third locating hole 52 internal locking, and the keyway cooperates with the third locating hole, strengthens the steadiness of being connected with the locating pin, is favorable to improving the precision. The right clamping piece 4 comprises a positioning column 41 and a first hexagon head bolt 42, the first hexagon head bolt 42 comprises a hexagon head 43 and a second bolt 44, the positioning column 41 is vertically arranged on the positioning plate 5, the second bolt 44 penetrates through the positioning column 41 to be abutted against the right end surface 75 of the cylinder body 7, and the second bolt 44 can be driven to translate leftwards to press the cylinder body 7 together with the left clamping piece 3 when the hexagon head 43 is rotated, so that the cylinder body 7 is positioned and fixed in the horizontal direction.
In the embodiment, a jackscrew 45 is coaxially arranged between the hexagonal head bolt 42 and the cylinder body 7, and the jackscrew can play a role in positioning the cylinder body so that the cylinder body cannot be deviated in the clamping process.
In the present embodiment, the positioning column 41 is in an inverted "T" shape, the first hexagon head bolt 42 is disposed in the long vertical side of the positioning column 41, and the horizontal side of the inverted "T" shape is used for fixing the positioning column 41 on the mounting plate 6, so that the connection is stable and firm.
In this embodiment, the positioning column 41 is bolted to the positioning plate 5, the bolted connection includes bolt holes 46 disposed on two sides of the first hexagon head bolt 42, and a second hexagon head bolt 47 engaged with the bolt holes, the bolted connection is convenient for installation and disassembly, and the connection is stable.
In the present embodiment, a first top plate 14 is disposed between the first nut 11 and the pressing member 13, and/or a second top plate 22 is disposed between the second nut 21 and the positioning plate 5. The top plate can improve the positioning stability between the nut and the pressing piece or between the nut and the positioning plate, is not easy to generate relative offset, and is convenient to clamp.
In this embodiment, the pressing member 13 is provided with a positioning sleeve 16 at the center inside, and the inner diameter of the positioning sleeve 16 matches with the maximum outer diameter of the first bolt 12. The locating sleeve can realize the limiting of the first bolt in the horizontal direction and the vertical direction, so that the locating and clamping operation is facilitated.
In the present embodiment, the number of the left clamp members 3 is 2 to 3, and the left clamp members are respectively located on the upper and lower sides of the rear end surface 76 of the cylinder 7 when the number of the left clamp members is 2, and are respectively located on the upper, middle and lower sides of the rear end surface 76 of the cylinder 7 when the number of the left clamp members is 3. Preferably, 2 positioning devices are arranged, the structure is simple, and the positioning effect is good.
In the present embodiment, the positioning plate 5 is bolted to the mounting plate 6. The bolt connection is convenient to install and detach and is stable in connection.
In this embodiment, the positioning plate 5 is further provided with a plurality of positioning blocks 53, the positioning blocks 53 are disposed inside or outside the lower end surface 72 of the cylinder 7, and the positioning blocks 53 are used for being matched with the side edges of the lower end surface 72 of the cylinder 7 to realize positioning on the horizontal plane of the cylinder 7. The positioning block 53 may be disposed at four corners inside the lower end surface 72 of the cylinder 7, or at the center of four sides of the lower end surface 72 of the cylinder 7, or at the center of the front side and the back side of the lower end surface 72 of the cylinder 7. The positioning block plays a role in guiding and aligning before the cylinder body is installed on the clamp and also plays a role in assisting in positioning.
The working principle of the invention is as follows: the clamp is directly additionally arranged on a common numerical control machine tool, the center of the cylinder body is positioned by a step hole, the ideal verticality and low error state can be finely adjusted by adjusting bolts and nuts in the upper clamping piece, the lower clamping piece, the left clamping piece and the right clamping piece, and then the straight hole of the cylinder body is processed.
After the positioning state is determined, the perpendicularity and center distance errors of all subsequent cylinder body straight holes are almost zero, and the processing quality is high; by adopting the clamp provided by the invention, tens of batches of cylinder bodies are processed by using a common numerical control machine tool, and the qualification rate reaches 100%. The common numerical control machine tool is low in price, the machining efficiency is 3 times or more than that of the existing horizontal machining center, and the large-scale numerical control machine tool has great economic benefit. The invention has very wide popularization value and can be popularized and applied in large scale in industrialization.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (10)
1. The clamp for finely turning the straight hole of the cylinder body is characterized by comprising an upper clamping piece (1), a lower clamping piece (2), a left clamping piece (3), a right clamping piece (4), a positioning plate (5) and a mounting plate (6), wherein the cylinder body (7) is fixedly mounted on the positioning plate (5) through the upper clamping piece (1), the lower clamping piece (2), the left clamping piece (3) and the right clamping piece (4), and the positioning plate (5) is vertically arranged on the mounting plate (6) so as to position the cylinder body (7) for processing; the lower end face (72) of the cylinder body (7) is arranged on the positioning plate (5), the upper clamping piece (1) is used for extending into the upper end face (71) of the cylinder body (7) and fixing the cylinder body, the upper clamping piece (1) comprises a first nut (11), a first bolt (12) and a pressing piece (13), a second positioning hole (15) is formed in the center of the pressing piece (13), a first positioning hole (51) is formed in the corresponding position of the positioning plate (5), the bottom face of the pressing piece (13) is abutted to the upper end face (71) of the cylinder body (7), the first bolt (12) penetrates through the second positioning hole (15), a step hole (78) in the center of the cylinder body (7) and the first positioning hole (51) to expose the lower end of the positioning plate (5), the first nut (11) is used for being matched with the first bolt (12) to press the pressing piece (13), and the lower clamping piece (2) comprises a second nut (21) and a first bolt (12), when the first nut (11) and the second nut (21) are rotated, the first bolt (12), the pressing piece (13) and the positioning plate (5) can be matched with each other to press the lower end surface (72) of the cylinder body (7), so that the cylinder body (7) is positioned and fixed in the vertical direction; the left clamping piece (3) is abutted against the rear end surface (76) of the cylinder body (7) and comprises a positioning pin (31) and a pin groove (32), a third positioning hole (52) is arranged at the corresponding position of the positioning plate (5), the positioning pin (31) passes through the pin slot (32) and enters the third positioning hole (52) for locking, the right clamping piece (4) comprises a positioning column (41) and a first hexagon head bolt (42), the first hexagon head bolt (42) comprises a hexagon head (43) and a second bolt (44), the positioning column (41) is vertically arranged on the positioning plate (5), the second bolt (44) penetrates through the positioning column (41) and is abutted against the right end surface (75) of the cylinder body (7), and when the hexagonal head (43) is rotated, the second bolt (44) can be driven to translate leftwards to be pressed with the left clamping piece (3) to press the cylinder body (7) together, so that the cylinder body (7) is positioned and fixed in the horizontal direction.
2. The jig for finely turning the straight hole of the cylinder body as claimed in claim 1, wherein a jackscrew (45) is further coaxially arranged between the hexagon head bolt (42) and the cylinder body (7).
3. The jig for finely turning the cylinder body straight hole as claimed in claim 1, wherein the positioning column (41) is in an inverted T shape.
4. The jig for finely turning the cylinder body straight hole as claimed in claim 1, wherein the positioning column (41) is in bolted connection with the positioning plate (5), and the bolted connection comprises bolt holes (46) arranged at two sides of a first hexagon head bolt (42) and a second hexagon head bolt (47) matched with the bolt holes.
5. The jig for the straight hole of the finish turning cylinder body according to claim 1, wherein a first top plate (14) is arranged between the first nut (11) and the pressing piece (13), and/or a second top plate (22) is arranged between the second nut (21) and the positioning plate (5).
6. The clamp for finely turning the straight hole of the cylinder body according to claim 1, wherein a positioning sleeve (16) is arranged at the center of the inside of the pressing piece (13), and the inner diameter of the positioning sleeve (16) is matched with the maximum outer diameter of the first bolt (12).
7. The clamp for finely turning the cylinder straight hole is characterized in that 2-3 left clamping pieces (3) are arranged, wherein 2 left clamping pieces are respectively arranged at the upper side, the lower side and the upper side of the rear end face (76) of the cylinder (7) when 2 left clamping pieces are arranged, and 3 left clamping pieces are respectively arranged at the upper side, the middle side and the lower side of the rear end face (76) of the cylinder (7) when 3 left clamping pieces are arranged.
8. The jig for finely turning the straight hole of the cylinder body as claimed in claim 1, wherein the positioning plate (5) is bolted to the mounting plate (6).
9. The jig for finely turning the straight hole of the cylinder body according to claim 1, wherein a plurality of positioning blocks (53) are further arranged on the positioning plate (5), the positioning blocks (53) are arranged inside or outside the lower end surface (72) of the cylinder body (7), and the positioning blocks (53) are used for being matched with the side edge of the lower end surface (72) of the cylinder body (7) to realize the positioning on the horizontal plane of the cylinder body (7).
10. The jig for finely turning the cylinder body straight hole as claimed in claim 9, wherein the positioning blocks (53) are arranged at four corners inside the lower end surface (72) of the cylinder body (7), or at the center positions of four sides of the lower end surface (72) of the cylinder body (7), or at the center positions of the front side and the back side of the lower end surface (72) of the cylinder body (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110779891.5A CN113385962A (en) | 2021-07-09 | 2021-07-09 | Finish turning cylinder body straight hole clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110779891.5A CN113385962A (en) | 2021-07-09 | 2021-07-09 | Finish turning cylinder body straight hole clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113385962A true CN113385962A (en) | 2021-09-14 |
Family
ID=77625823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110779891.5A Pending CN113385962A (en) | 2021-07-09 | 2021-07-09 | Finish turning cylinder body straight hole clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113385962A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103386617A (en) * | 2012-05-09 | 2013-11-13 | 安徽华菱汽车有限公司 | Cylinder cover and positioning device for processing cylinder cover |
| CN204565656U (en) * | 2015-04-03 | 2015-08-19 | 中国一拖集团有限公司 | A kind of workpiece blank positioner |
| CN204748096U (en) * | 2015-06-10 | 2015-11-11 | 西安北方光电科技防务有限公司 | Locking mechanism helicoid processingequipment |
| CN204976068U (en) * | 2015-05-29 | 2016-01-20 | 安徽池州家用机床股份有限公司 | Round hole turning anchor clamps |
| CN205271457U (en) * | 2016-01-13 | 2016-06-01 | 哈尔滨汽轮机厂有限责任公司 | A anchor clamps for processing turbine blade steam passage |
-
2021
- 2021-07-09 CN CN202110779891.5A patent/CN113385962A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103386617A (en) * | 2012-05-09 | 2013-11-13 | 安徽华菱汽车有限公司 | Cylinder cover and positioning device for processing cylinder cover |
| CN204565656U (en) * | 2015-04-03 | 2015-08-19 | 中国一拖集团有限公司 | A kind of workpiece blank positioner |
| CN204976068U (en) * | 2015-05-29 | 2016-01-20 | 安徽池州家用机床股份有限公司 | Round hole turning anchor clamps |
| CN204748096U (en) * | 2015-06-10 | 2015-11-11 | 西安北方光电科技防务有限公司 | Locking mechanism helicoid processingequipment |
| CN205271457U (en) * | 2016-01-13 | 2016-06-01 | 哈尔滨汽轮机厂有限责任公司 | A anchor clamps for processing turbine blade steam passage |
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Application publication date: 20210914 |
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| RJ01 | Rejection of invention patent application after publication |