CN109261793B - Clamping piece anchor plate inner hole machining system and machining method using same - Google Patents
Clamping piece anchor plate inner hole machining system and machining method using same Download PDFInfo
- Publication number
- CN109261793B CN109261793B CN201811325730.3A CN201811325730A CN109261793B CN 109261793 B CN109261793 B CN 109261793B CN 201811325730 A CN201811325730 A CN 201811325730A CN 109261793 B CN109261793 B CN 109261793B
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- anchor plate
- clamping piece
- piece anchor
- inner hole
- hole
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- 238000003754 machining Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000001125 extrusion Methods 0.000 claims abstract description 49
- 230000007246 mechanism Effects 0.000 claims abstract description 38
- 238000003825 pressing Methods 0.000 claims abstract description 30
- 238000001514 detection method Methods 0.000 claims description 25
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 230000003028 elevating effect Effects 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 238000003672 processing method Methods 0.000 claims 1
- 238000003801 milling Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 239000000725 suspension Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
- B21D31/04—Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P9/00—Treating or finishing surfaces mechanically, with or without calibrating, primarily to resist wear or impact, e.g. smoothing or roughening turbine blades or bearings; Features of such surfaces not otherwise provided for, their treatment being unspecified
- B23P9/02—Treating or finishing by applying pressure, e.g. knurling
- B23P9/025—Treating or finishing by applying pressure, e.g. knurling to inner walls of holes by using axially moving tools
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention provides a clamping piece anchor plate inner hole machining system and a machining method using the same, wherein the clamping piece anchor plate inner hole machining system comprises: hole pressing equipment for performing extrusion hardening on the inner wall of the inner hole of the clamping piece anchor plate; the hole pressing device comprises: the clamping anchor plate comprises a first mounting frame, a first lifting mechanism, a pressing plate, a supporting mechanism, a movable seat and a plurality of extrusion heads, wherein the first lifting mechanism is mounted at the top of the first mounting frame, the pressing plate is connected to the output end of the first lifting mechanism, the first lifting mechanism is used for driving the pressing plate to move in the vertical direction, the movable seat placed on the supporting mechanism is arranged below the pressing plate, the extrusion heads are mounted on the movable seat, and each extrusion head is used for extending into an inner hole of the clamping anchor plate. The clamping piece anchor plate inner hole machining system solves the problems that in the prior art, the clamping piece anchor plate inner hole is required to be machined by adopting the steps of finish milling and fine milling, so that the production cost is high, the production efficiency is low, and the energy conservation is not facilitated.
Description
Technical Field
The invention relates to the field of machining of clamping piece anchor plates for bridges, in particular to a clamping piece anchor plate inner hole machining system and a machining method using the clamping piece anchor plate inner hole machining system.
Background
The clamping piece anchor plate is provided with a plurality of inner holes, and the clamping piece anchor plate is matched with other parts, so that the machining precision requirement on the inner holes of the clamping piece anchor plate is higher. In order to enable the machining precision of the clamping piece anchor plate to meet the requirement, in the prior art, milling is carried out on the inner hole of the clamping piece anchor plate by adopting a milling machine and the like, so that finish milling and finish milling of the inner hole of the clamping piece anchor plate are realized, but the following problems exist:
1) Finish milling and fine milling require different milling machines, thus leading to a higher production cost;
2) Both finish milling and finish milling require time and energy, resulting in low production efficiency and unfavorable energy conservation.
Disclosure of Invention
The invention provides a clamping piece anchor plate inner hole machining system and a machining method using the same, and solves the problems that in the prior art, the clamping piece anchor plate inner hole is required to be machined by adopting the steps of finish milling and fine milling, so that the production cost is high, the production efficiency is low, and the energy conservation is not facilitated.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention firstly provides a clamping piece anchor plate inner hole machining system, which comprises: hole pressing equipment for performing extrusion hardening on the inner wall of the inner hole of the clamping piece anchor plate;
the hole pressing device comprises: the clamping piece anchor plate comprises a first mounting frame, a first lifting mechanism, a pressing plate, a supporting mechanism, a movable seat and a plurality of extrusion heads, wherein the first lifting mechanism is mounted at the top of the first mounting frame, the pressing plate is connected to the output end of the first lifting mechanism, the first lifting mechanism is used for driving the pressing plate to move in the vertical direction, the movable seat placed on the supporting mechanism is arranged below the pressing plate, the movable seat is provided with the extrusion heads, each extrusion head is used for extending into an inner hole of the clamping piece anchor plate, the movable seat is used for supporting the clamping piece anchor plate, and the movable seat can move relative to the supporting mechanism.
The invention also provides a method for processing the inner hole of the clamping piece anchor plate, which comprises the following steps:
step one, placing a clamping piece anchor plate on a movable seat, wherein each inner hole of the clamping piece anchor plate is inserted with an extrusion head;
step two, pushing the clamping piece anchor plate, the movable seat and the extrusion head to the position right below the compression disc;
starting a first lifting mechanism, and pushing the clamping piece anchor plate to the movable seat by the pressing disc so that the extrusion head is extruded into an inner hole of the clamping piece anchor plate;
and step four, finishing processing.
Compared with the prior art, the invention has the following beneficial effects:
the movable seat is arranged to support the extrusion head, the movable seat can move relative to the compression disc, the clamping piece anchor plate is placed on the compression disc at a position deviated from the compression disc, the extrusion head is ensured to extend into the inner hole of the clamping piece anchor plate, the blocking of the compression disc and the like when the clamping piece anchor plate is installed is avoided, convenience is provided for the installation of the clamping piece anchor plate, each extrusion head is in a truncated cone shape with a small upper part and a large lower part, and the pointed end of the extrusion head can extend into the inner hole of the clamping piece anchor plate when the extrusion head is installed; the installation to first elevating system has been realized to the first mounting bracket, first elevating system is the jack of inversion, the output and the clamp plate of jack are connected, compress tightly the dish and move down under the clamp of jack, force the clamping piece anchor plate to remove to the movable seat, along with the downshift of clamping piece anchor plate, make the extrusion head stretch into the length in the clamping piece anchor plate longer and longer, extrusion head extrusion clamping piece anchor plate hole inner wall, make clamping piece anchor plate hole inner wall hardening, the burr of clamping piece anchor plate hole diameter is impressed, make clamping piece anchor plate hole inner wall become smooth, then make the expansion of clamping piece anchor plate inner hole size, control the size that obtains clamping piece anchor plate inner hole size through the pressure of control jack and the size of extrusion head.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic diagram of a clip anchor plate bore machining system;
FIG. 2 is a left side view of the hole pressing apparatus;
fig. 3 is a top view of the slide rail.
Reference numerals: the first mounting bracket 11, the first lifting mechanism 12, the pressing disk 13, the supporting mechanism 14, the supporting table 141, the sliding rail 142, the moving seat 15, the base 151, the mounting table 152, the pull-assisting handle 153, the first spring 154, the extrusion head 16, the hanging hook 21, the hanging ring 22, the knocking hammer 23, the clip anchor plate 3, the second mounting bracket 40, the second lifting mechanism 41, the mounting disk 42, the detecting head 45, the displacement sensor 46 and the indicator lamp 47.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the present invention more clear and easy to understand, the present invention is further described below with reference to the accompanying drawings and the detailed description:
the invention provides a clamping piece anchor plate 3 inner hole machining system, which comprises: hole pressing equipment for performing extrusion hardening on the inner wall of the inner hole of the clamping piece anchor plate 3;
the hole pressing device comprises: the clamping anchor plate comprises a first mounting frame 11, a first lifting mechanism 12, a pressing disc 13, a supporting mechanism 14, a movable seat 15 and a plurality of extrusion heads 16, wherein the first lifting mechanism 12 is mounted at the top of the first mounting frame 11, the output end of the first lifting mechanism 12 is connected with the pressing disc 13, the first lifting mechanism 12 is used for driving the pressing disc 13 to move in the vertical direction, the movable seat 15 placed on the supporting mechanism 14 is arranged below the pressing disc 13, the extrusion heads 16 are mounted on the movable seat 15, each extrusion head 16 is used for extending into an inner hole of the clamping anchor plate 3, the movable seat 15 is used for supporting the clamping anchor plate 3, and the movable seat 15 can move relative to the supporting mechanism 14.
In order to facilitate the movement of the mobile seat 15, the installation of the extrusion head 16 is realized, the mobile seat 15 comprising: base 151, mount table 152 and helping the handle 153, the base 151 is used for placing on supporting mechanism 14, the sunken mounting groove that forms in base 151 bottom surface, be used for placing mount table 152 in the mounting groove, a plurality of perforations have been seted up to mount table 152, each extrusion head 16 all passes a perforation, the perforation is the truncated cone shape, the diameter of fenestrated top is greater than the diameter of fenestrated bottom, extrusion head 16 is supported by the mounting groove inner wall, mount table 152 passes through the screw and is connected with base 151, help the handle 153 is installed on the base 151 lateral wall. The extrusion head 16 is mounted on the base 151 in a welded mode, and meanwhile, the extrusion head 16 is supported by the inner wall of the mounting groove, so that the extrusion head 16 and the mounting table 152 are prevented from being separated due to overlarge pressure.
To facilitate the disengagement of the clip anchor plate 3 from the mounting block 152 and the extrusion head 16, the mobile seat 15 further comprises: at least three first springs 154, the top surface of the mounting table 152 is recessed to form a plurality of mounting holes, each mounting hole is internally provided with a first spring 154, and the base 151 supports the clamping piece anchor plate 3 through the first springs 154. Because the clamping piece anchor plate 3 is pressed on the mounting table 152, the extrusion head 16 is embedded into the inner hole of the clamping piece anchor plate 3, and the close fitting effect of the extrusion head 16 and the inner wall of the inner hole of the clamping piece anchor plate 3 is large, the clamping piece anchor plate 3 and the extrusion head 16 are difficult to separate, and by arranging the first spring 154, the first spring 154 is compressed after the clamping piece anchor plate 3 is pressed on the mounting table 152, the first spring 154 gives the clamping piece anchor plate 3 a tendency to separate from the extrusion head 16, and therefore the required force is reduced when the clamping piece anchor plate is broken off.
To facilitate movement of the mobile seat 15, the support mechanism 14 comprises: the support table 141 and the slide rail 142, the support table 141 is placed on ground, and support table 141 one end stretches into to first mounting bracket 11 below, installs slide rail 142 on support table 141, and base 151 slidably installs on slide rail 142, and support table 141 other end is kept away from first mounting bracket 11.
In order to facilitate the separation of the clip anchor plate 3 from the mounting table 152 after the clip anchor plate 3 is pressed against the mounting table 152, a suspension hook 21 is mounted on the side wall of the first mounting frame 11, a suspension ring 22 is suspended on the suspension hook 21, and a knocking hammer 23 is fixed on the suspension ring 22. During use, the edges of the clamping piece anchor plates 3 are beaten, the clamping piece anchor plates 3 and the extrusion head 16 are enabled to jump under the action of vibration, a distance is reserved between the top surface of the mounting table 152 and the top surface of the base 151, the outer diameter of the mounting table 152 is smaller than that of the clamping piece anchor plates 3, and a gap is reserved between the clamping piece anchor plates 3 and the base 151, so that the clamping piece anchor plates 3 can be conveniently taken down from the mounting table 152.
For convenience of detection, a second mounting frame 40 is mounted beside the first mounting frame 11, and detection equipment for detecting whether the size of the inner hole of the clip anchor plate 3 reaches a required value is mounted on the second mounting frame 40. The inner hole of the clamping piece anchor plate 3 is processed at one end of the sliding rail 142, the clamping piece anchor plate 3 is mounted in the middle of the sliding rail 142 on the movable seat 15, the inner hole of the processed clamping piece anchor plate 3 is detected at the other end of the sliding rail 142, and the production and detection are facilitated due to one-line operation.
In order to design a simple structure's check out test set, check out test set includes: the second elevating system 41, the mounting disc 42, a controller, a plurality of detection heads 45, a plurality of second springs, a plurality of displacement sensor 46, a plurality of switch triodes and a plurality of pilot lamps 47, install second elevating system 41 at second mounting bracket 40 top, the mounting disc 42 is installed to the output of second elevating system 41, the recessed a plurality of connecting holes that are formed in mounting disc 42 bottom surface, a detection head 45 has all been placed to each connecting hole, each detection head 45 is connected to a second spring one end, the second spring other end is connected to the inner wall in place connecting hole, the second spring is located detection head 45 top, a pilot lamp 47 is all installed on each detection head 45, install a plurality of displacement sensor 46 on the mounting disc 42, each sensor is used for detecting the distance of place detection head 45 to the last of displacement sensor 46, all displacement sensor 46 all are connected to the controller, the controller is connected to the base of all switch triodes, the projecting pole ground of each switch triodes, the pilot lamp 47 positive pole is connected to pilot lamp 47 negative pole, pilot lamp 47 is connected to the power. The detection head 45 is of a conical frustum structure with a large upper part and a small lower part, the size of the detection head 45 is matched with the size of the inner hole of the standard clamping piece anchor plate 3, the second lifting mechanism 41 (which is a cylinder, so that the force of the first lifting mechanism 12 is not required at the moment) drives the mounting plate 42 to move downwards during detection, the detection head 45 moves towards the inner hole of the clamping piece anchor plate 3, the detection head 45 can be smoothly inserted into the inner hole of the clamping piece anchor plate 3 under the elasticity of the second spring, namely the mounting plate 42 moves downwards to a designated position, the step surface of the detection head 45 is enabled to be flush with the top surface of the clamping piece anchor plate 3 under the elasticity of the second spring (the distance between the detection head 45 and the mounting plate 42 is L1 when the step surface is flush), and the processing size is indicated to be in place, and the displacement sensor 46 detects L1. When the value detected by the displacement sensor 46 is less than L1, then the current hole size machining is proved to be not in place and the compaction process needs to be continued. The controller judges which inner hole is not processed in place by receiving the displacement sensor 46, and controls the corresponding indicator lamp 47 to be on through the switch triode so as to prompt which inner hole is not processed in place.
The embodiment also provides a method for processing the inner hole of the clamping piece anchor plate 3, which comprises the following steps:
step one, placing the clamping piece anchor plate 3 on a movable seat 15, wherein each inner hole of the clamping piece anchor plate 3 is inserted with an extrusion head 16;
step two, pushing the clamping piece anchor plate 3, the movable seat 15 and the extrusion head 16 to the position right below the compression disc 13;
step three, starting a first lifting mechanism 12, and pushing the clamping piece anchor plate 3 to a movable seat 15 by a pressing disc 13 (the pressing force range is 2000-3000 kg) so that the extrusion head 16 extrudes into an inner hole of the clamping piece anchor plate 3;
and step four, finishing processing.
In order to enable the size of the inner hole of the clamping piece anchor plate 3 to reach the standard, detecting the size of each inner hole of the clamping piece anchor plate 3 by using detection equipment after the third step and before the fourth step, judging whether the size of each inner hole of the clamping piece anchor plate 3 meets the requirements, and if not, repeating the second step and the third step; if yes, go to step four.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (9)
1. A clip anchor plate bore machining system, comprising: hole pressing equipment for performing extrusion hardening on the inner wall of the inner hole of the clamping piece anchor plate;
the hole pressing device comprises: the clamping piece anchor plate comprises a first mounting frame, a first lifting mechanism, a pressing plate, a supporting mechanism, a movable seat and a plurality of extrusion heads, wherein the first lifting mechanism is mounted at the top of the first mounting frame, the pressing plate is connected to the output end of the first lifting mechanism, the first lifting mechanism is used for driving the pressing plate to move in the vertical direction, the movable seat placed on the supporting mechanism is arranged below the pressing plate, the movable seat is provided with the extrusion heads, each extrusion head is used for extending into an inner hole of the clamping piece anchor plate, the movable seat is used for supporting the clamping piece anchor plate, and the movable seat can move relative to the supporting mechanism.
2. The clip anchor plate hole machining system of claim 1, wherein the movable mount comprises: base, mount table and helping the handle, the base is used for placing on supporting mechanism, and the base bottom surface is sunken to form the mounting groove, is used for placing the mount table in the mounting groove, and a plurality of perforations have been seted up to the mount table, and each extrusion head all passes a perforation, and the perforation is the truncated cone shape, and the fenestrate top diameter is greater than the fenestrate bottom diameter, and the extrusion head is supported by the mounting groove inner wall, and the mount table passes through the screw to be connected with the base, installs helping the handle on the base lateral wall.
3. The clip anchor plate hole machining system of claim 2, wherein the mobile station further comprises: at least three first springs, the sunken a plurality of mounting holes that form of mount table top surface, all install a first spring in each mounting hole, the base supports clamping piece anchor plate through first spring.
4. A clip anchor plate hole machining system according to claim 3, wherein the support means comprises: support table and slide rail, support the table and place subaerial, support table one end and stretch into to first mounting bracket below, install the slide rail on supporting the table, the base can install on the slide rail slidingly, support the table other end and keep away from first mounting bracket.
5. The clip anchor plate inner hole machining system according to claim 4, wherein a hanging hook is mounted on the side wall of the first mounting frame, a hanging ring is hung on the hanging hook, and a knocking hammer is fixed on the hanging ring.
6. The clip anchorage plate hole machining system of claim 5, wherein a second mounting bracket is mounted adjacent to the first mounting bracket, and wherein a detection device for detecting whether the clip anchorage plate hole size has reached a desired value is mounted on the second mounting bracket.
7. The clip anchor plate hole machining system of claim 6, wherein the detection device comprises: the second elevating system, the mounting disc, a controller, a plurality of detection heads, a plurality of second springs, a plurality of displacement sensor, a plurality of switch triode and a plurality of pilot lamp, install second elevating system at second mounting bracket top, the mounting disc is installed to second elevating system's output, the mounting disc bottom surface is sunken to be formed with a plurality of connecting holes, a detection head has all been placed to each connecting hole, every detection head all is connected to a second spring one end, the second spring other end is connected to on the inner wall of place connecting hole, the second spring is located and detects first top, a pilot lamp is all installed on every detection head, install a plurality of displacement sensor on the mounting disc, every sensor is used for detecting the distance of place detection head to displacement sensor, all displacement sensor all are connected to the controller, the controller is connected to the base of all switch triodes, the projecting pole ground of every switch triode, the collecting electrode of every switch triode is connected to the pilot lamp negative pole, the pilot lamp positive pole is connected to the power.
8. The processing method of the inner hole of the clamping piece anchor plate is characterized by comprising the following steps of:
step one, placing a clamping piece anchor plate on a movable seat, wherein each inner hole of the clamping piece anchor plate is inserted with an extrusion head;
step two, pushing the clamping piece anchor plate, the movable seat and the extrusion head to the position right below the compression disc;
starting a first lifting mechanism, and pushing the clamping piece anchor plate to the movable seat by the pressing disc so that the extrusion head is extruded into an inner hole of the clamping piece anchor plate;
and step four, finishing processing.
9. The method for machining the inner hole of the clamping piece anchor plate according to claim 8, wherein after the third step is performed and before the fourth step is performed, detecting the size of each inner hole of the clamping piece anchor plate by using detection equipment to judge whether the size of each inner hole of the clamping piece anchor plate meets the requirement, and if not, repeating the second step and the third step; if yes, go to step four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811325730.3A CN109261793B (en) | 2018-11-08 | 2018-11-08 | Clamping piece anchor plate inner hole machining system and machining method using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811325730.3A CN109261793B (en) | 2018-11-08 | 2018-11-08 | Clamping piece anchor plate inner hole machining system and machining method using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109261793A CN109261793A (en) | 2019-01-25 |
| CN109261793B true CN109261793B (en) | 2024-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811325730.3A Active CN109261793B (en) | 2018-11-08 | 2018-11-08 | Clamping piece anchor plate inner hole machining system and machining method using same |
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| Country | Link |
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| CN (1) | CN109261793B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006019405A1 (en) * | 2006-04-24 | 2007-10-31 | Eads Deutschland Gmbh | Tool for cold expansion of holes |
| CN203635734U (en) * | 2013-11-15 | 2014-06-11 | 中色（天津）特种材料有限公司 | Broaching machine with precision controlled by encoders |
| CN104646912A (en) * | 2015-01-07 | 2015-05-27 | 重庆大学 | Friction stir enhancer for inner bore of cylinder barrel and friction stir enhancing mechanism of friction stir enhancer |
| CN205414108U (en) * | 2016-03-18 | 2016-08-03 | 信质电机股份有限公司 | Electric motor car iron core punches a hole, finishing hole equipment |
| CN209094326U (en) * | 2018-11-08 | 2019-07-12 | 重庆长江预应力有限公司 | A kind of intermediate plate anchor slab inner hole system of processing |
-
2018
- 2018-11-08 CN CN201811325730.3A patent/CN109261793B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006019405A1 (en) * | 2006-04-24 | 2007-10-31 | Eads Deutschland Gmbh | Tool for cold expansion of holes |
| CN203635734U (en) * | 2013-11-15 | 2014-06-11 | 中色（天津）特种材料有限公司 | Broaching machine with precision controlled by encoders |
| CN104646912A (en) * | 2015-01-07 | 2015-05-27 | 重庆大学 | Friction stir enhancer for inner bore of cylinder barrel and friction stir enhancing mechanism of friction stir enhancer |
| CN205414108U (en) * | 2016-03-18 | 2016-08-03 | 信质电机股份有限公司 | Electric motor car iron core punches a hole, finishing hole equipment |
| CN209094326U (en) * | 2018-11-08 | 2019-07-12 | 重庆长江预应力有限公司 | A kind of intermediate plate anchor slab inner hole system of processing |
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| Publication number | Publication date |
|---|---|
| CN109261793A (en) | 2019-01-25 |
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