CN108889812A - A kind of device for improving copper rod and flattening angle precision - Google Patents
A kind of device for improving copper rod and flattening angle precision Download PDFInfo
- Publication number
- CN108889812A CN108889812A CN201811012207.5A CN201811012207A CN108889812A CN 108889812 A CN108889812 A CN 108889812A CN 201811012207 A CN201811012207 A CN 201811012207A CN 108889812 A CN108889812 A CN 108889812A
- Authority
- CN
- China
- Prior art keywords
- copper rod
- angle
- dial plate
- flattening
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 112
- 239000010949 copper Substances 0.000 title claims abstract description 112
- 238000009434 installation Methods 0.000 claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims description 17
- 210000004027 cell Anatomy 0.000 claims description 2
- 239000003381 stabilizer Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009466 transformation Effects 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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
-
- 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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses the devices that a kind of raising copper rod flattens angle precision, it includes a dial plate, the one height resetting-mechanism of bottom of the dial plate is connected with copper rod processing machine worktable, an installation circular hole is offered on dial plate, rotation is equipped with an angle scale in installation circular hole, it perforates at the middle part of angle scale equipped with a copper rod, is installed with an abutment plate on the surface of angle scale.The device of raising copper rod flattening angle precision, during being flattened to copper rod, abutment plate and dial plate also move downwardly together under the impact of upper mold, after the piston rod backhaul of flattening unit starts, dial plate drives abutment plate to keep in the center under action of reset spring, abutment plate is also in initial position when flattening next time, guarantees the accuracy for flattening angle.Abutment plate has the movement surplus an of vertical direction during flattening, is avoided that copper rod reverses between collapsed position and copper rod ontology when being impacted by upper mold, keeps the central stabilizer of collapsed position.
Description
Technical field：
The invention belongs to female rod processing equipment technical field more particularly to a kind of dresses for improving copper rod and flattening angle precision
It sets.
Background technique：
Copper rod processing machine be exclusively for copper rod is flattened in high and low pressure electric appliance complexes manufacturing process, punching and
The special equipment of chamfering.Existing copper rod processing machine flattens unit in operation, manually adjusts the flattening angle of copper rod completely
Degree.After the operator position to be flattened copper rod is sequentially inserted into flattening upper mold and flattens between lower die, according to flattening angle requirement
Artificial eye estimate determines the placement location of copper rod ontology, then flattens cylinder movement and is flattened.Above-mentioned manually range estimation is adjusted
The mode of the flat angle of seamless flattens angle adjustment amplitude and is not easy to grasp, and obtained copper rod flattening angle precision is low, and copper rod is installed
It can be frequently found to cause to mismatch with installation site because flattening angle inaccuracy when on electronic box, can only manually adjust repeatedly again
The bending angle of copper rod achievees the purpose that for copper rod to be mounted on electronic box.
Summary of the invention：
The present invention provides a kind of guarantees to be convenient for measuring the raising copper rod flattening that copper rod flattens angle, guarantees result precision
The device of angle precision, solves problems of the prior art.
Used technical solution is the present invention to solve above-mentioned technical problem：
A kind of device for improving copper rod and flattening angle precision, including a dial plate, one height of bottom of the dial plate
Resetting-mechanism is connected with copper rod processing machine worktable, and an installation circular hole is offered on dial plate, rotates and sets in installation circular hole
There is a circular angle scale, perforates at the middle part of angle scale equipped with a copper rod, the center face copper rod processing of the copper rod perforation
Machine flattens the crush zone center of unit, is installed with an abutment plate being arranged perpendicular to angle scale on the surface of angle scale, described
Abutment plate with angle scale is concentric rotates, the radius of copper rod to be flattened is equal to against plate surface and the vertical range of angle disk center,
It is equipped with a pair of of angle scale turned position on dial plate into line-locked retaining mechanism, instruction is equipped on angle scale circumferencial direction
The graduation mark of central angle, is equipped with a pointer on the dial plate right above angle scale, and the abutment plate is parallel on angle scale
Zero graduation line.
Two fixing seats are installed in angle panel surface, the two sides of the abutment plate pass through bolt and fixing seat phase respectively
Even.
A copper rod limiting slot for being used to accommodate copper rod for being parallel to copper rod perforation axis is equipped in abutment plate.
The height resetting-mechanism includes the pin that two outer covers are equipped with reset spring, the top of the pin and pointer
The bottom of plate is connected, and the bottom of pin is pierced by the pin hole setting on copper rod processing machine worktable, in dial plate and copper rod
Processing machine, which flattens, is equipped with two guiding mechanisms between unit, the guiding mechanism includes the sliding block for being embedded at pointer back,
Sliding slot is offered on sliding block vertically, cell surface is flattened in copper rod processing machine and is equipped with a guide rail vertically, the sliding block passes through sliding slot
Sliding is embedded at guide rail surface, and two guiding mechanisms are distributed in the two sides of dial plate.
It is respectively equipped with a cylindrical groove in the bottom of dial plate, is respectively protruding at the top of two pins in two cylindrical grooves and and cylindricality
Groove top portion is connected.
Installation circular hole side wall on the dial plate has an installation circular hole step surface, and the angle scale is equipped with and installation
The angle scale step surface that circular hole step surface matches, the biggish side of the installation circular hole step surface internal diameter is close to copper rod processing machine
Flatten unit setting.
The retaining mechanism includes the clamping screw being inserted on dial plate in screw thread, and the end of the clamping screw is supported
It is connected to the surface of angle scale.
The present invention using the above structure, has the following advantages that：
The raising copper rod flattens the device of angle precision, and copper rod is attached to abutment plate when work, copper rod processing machine flattens unit
Lower die, realize the limit in two freedom degrees, in the same plane because of abutment plate and copper rod ontology, and copper rod collapsed position
In the horizontal plane, so the flattening angle of copper rod is equal to the angle of abutment plate and horizontal plane, the angle of abutment plate and vertical direction
It can be read by angle scale, the angle for subtracting abutment plate and vertical direction with 90 ° conveniently can intuitively obtain the flattening of copper rod
Angle.Copper rod processing machine flattens during unit flattens copper rod, abutment plate and seats against the dial plate of plate upper
It is also moved downwardly together under the impact of mould, compresses reset spring.After the piston rod backhaul of flattening unit starts, in reset spring
Acting on lower dial plate drives abutment plate to keep in the center, and abutment plate is also in initial measurement locations when flattening next time, guarantees to flatten
The accuracy of angle.Since abutment plate has the movement surplus an of vertical direction during flattening, be avoided that copper rod by
It is reversed between collapsed position and copper rod ontology when upper mold is impacted, keeps the central stabilizer of collapsed position.To sum up, above each knot
The setting of structure, ensure that copper rod flatten angle measurement position accuracy, buffered copper rod flatten during copper rod ontology by
Impact, improve copper rod flatten angle precision.
Detailed description of the invention：
Fig. 1 is the structural schematic diagram of the embodiment of the present invention 1；
Fig. 2 is the right view of Fig. 1；
Fig. 3 is the top view of Fig. 2；
Fig. 4 is the partial sectional view of Fig. 2；
Fig. 5 is the enlarged structure schematic diagram in the portion A in Fig. 3；
Fig. 6 is the partial sectional view that copper rod processes machine worktable in Fig. 2；
Fig. 7 is the structural schematic diagram of Slipper in Fig. 5；
Fig. 8 is the structural schematic diagram of dial plate part in Fig. 4；
Fig. 9 is the structural schematic diagram of angle disc portion in Fig. 4；
Figure 10 is the structural schematic diagram of the embodiment of the present invention 2；
Figure 11 is the use state diagram being mounted on apparatus of the present invention on copper rod processing machine；
Figure 12 is the right view of Figure 11；
Figure 13 is the flattening angle schematic diagram of copper rod.
In figure, 1, dial plate, 2, copper rod processing machine worktable, 3, installation circular hole, 4, angle scale, 5, copper rod perforation, 6, copper
Stick processing machine flattens unit, 7, abutment plate, 8, fixing seat, 9, reset spring, 10, pin, 11, pin hole, 12, sliding block, 13, cunning
Slot, 14, guide rail, 15, cylindrical groove, 16, installation circular hole step surface, 17, angle scale step surface, 18, clamping screw, 19, copper rod limit
Position slot, 20, graduation mark, 21, pointer, 22, upper mold, 23, lower die.
Specific embodiment：
In order to clarify the technical characteristics of the invention, below by specific embodiment, and its attached drawing is combined, to this hair
It is bright to be described in detail.
Embodiment 1：
As shown in Fig. 1-Fig. 9 and Figure 11, Figure 12, the present embodiment improves the device that copper rod flattens angle precision, including one
The one height resetting-mechanism of bottom of dial plate 1, the dial plate 1 is connected with copper rod processing machine worktable 2, on dial plate 1
An installation circular hole 3 is offered, rotation is equipped with a circular angle scale 4 in installation circular hole 3, is equipped with one at the middle part of angle scale 4
The center face copper rod processing machine of copper rod perforation 5, the copper rod perforation 5 flattens the crush zone center of unit 6, in angle scale 4
Surface be installed with an abutment plate 7 being arranged perpendicular to angle scale 4, the abutment plate 7 and the concentric rotation of angle scale 4, abutment plate 7
The vertical range at surface and 4 center of angle scale is equal to the radius of copper rod to be flattened, and a pair of of 4 turns of angle scale is equipped on dial plate 1
Position is moved into line-locked retaining mechanism.
Fixed there are two fixing seat 8 on 4 surface of angle scale, the two sides of the abutment plate 7 pass through bolt and fixing seat 8 respectively
It is connected, abutment plate 7 and the vertical range at 4 center of angle scale are changed by replacing the abutment plate 7 of different-thickness, to be suitable for not
With the copper rod of diameter.
The height resetting-mechanism includes the pin 10 that two outer covers are equipped with reset spring 9, the top of the pin 10
It being connected with the bottom of dial plate 1, the pin hole 11 that the bottom of pin 10 is pierced by copper rod processing machine worktable 2 is arranged,
Dial plate 1 and copper rod processing machine flatten and are equipped with two guiding mechanisms between unit 6, and the guiding mechanism includes being embedded at dial plate 1
One sliding block 12 at the back side, offers sliding slot 13 vertically on sliding block 12, flattens 6 surface of unit in copper rod processing machine and is equipped with one vertically
Guide rail 14, the sliding block 12 are embedded at 14 surface of guide rail by the sliding of sliding slot 13, and two guiding mechanisms are distributed in the two of dial plate 1
Side.
It is respectively equipped with a cylindrical groove 15 in the bottom of dial plate 1, the top of two pins 10 is respectively protruding into two cylindrical grooves 15
And be connected at the top of cylindrical groove 15, the setting of cylindrical groove 15 plays restriction effect to the movement of reset spring 9, makes dial plate 1
It goes up and down more steady.
3 side wall of installation circular hole on the dial plate 1 has an installation circular hole step surface 16, and the angle scale 4 is equipped with
The angle scale step surface 17 matched with installation circular hole step surface 16, the biggish side patch of 16 internal diameter of installation circular hole step surface
Nearly copper rod processing machine flattens unit 6 and is arranged, and installation circular hole step surface 16 and angle scale step surface 17 cooperate, and makes angle scale 4
Flexible rotating in circular hole 3 can be installed, and will not deviate from out of installation circular hole 3 again.
The retaining mechanism includes the clamping screw 18 being inserted on dial plate 1 in screw thread, the clamping screw 18
End abutment is in the surface of angle scale 4.
The graduation mark 20 of instruction central angle, the dial plate 1 right above angle scale 4 are equipped on 4 circumferencial direction of angle scale
It is equipped with a pointer 21, the abutment plate 7 is parallel to the zero graduation line on angle scale 4.
When flattening the device of angle precision using the raising copper rod, first it is installed on copper rod processing machine, specific method
For：Guide rail 14 is installed in the surface two sides that copper rod processing machine flattens unit 6, makes sliding block 12 by sliding slot 13 on guide rail 14,
And the lower end of the pin 10 of 1 two sides of the bottom of dial plate is pierced by from the pin hole 11 on copper rod processing machine worktable 2, this sample hair
Bright device can be mounted on copper rod processing machine worktable 2 by height resetting-mechanism.
When flattening copper rod, first according to the angular turn angle scale 4 of workpiece drawing requirement, make to require on angle scale 4
Angle to the pointer 21 on positive dial plate 1, the clamping screw 18 tightened on locking mechanism carries out angle scale 4 and dial plate 1
It is fixed, prevent angle scale 4 from rotating.Operator holds copper rod, there are the both sides of a bending angle to be attached in abutment plate 7 copper rod, and
It is pierced by its end among angle scale 4 between the upper mold 22 and lower die 23 for putting in copper rod processing machine flattening unit 6, and is attached to down
On mould 23, such copper rod is just positioned in two freedom degree directions.
As shown in figure 13, the flattening angle of copper rod of the present invention refers to plane where the copper rod both sides with a bending angle
Angle where with end flattened portion between plane, so when the copper rod both sides with a bending angle are attached in abutment plate 7,
Abutment plate 7 and vertical direction have an angle, i.e. central angle on the angle scale of pointer instruction, the flattening angle of the angle and copper rod
The sum of degree is 90 °, intuitively measures reckoning to the flattening angle of copper rod so as to convenient.
Then, copper rod processing machine flattens unit 6 and acts, and the piston rod driving upper mold 22 for flattening cylinder impacts downwards lower die 23
Copper rod is flattened, when piston rod is moved to limit, completes flattening movement.Abutment plate 7 and solid during copper rod flattens
The dial plate 1 for determining abutment plate also moves downwardly together under the impact of upper mold 22, compresses reset spring 9.Flatten the work of cylinder
After stopper rod backhaul starts, reset spring 9 effect under dial plate 1 drive abutment plate 7 keep in the center, guarantee next time flatten when against
Plate 7 is also in measurement position, guarantees the accuracy for flattening angle.Abutment plate 7 has a space during flattening, in this way
It is avoided that between the collapsed position of copper rod and copper rod ontology to be not in windup-degree, keeps the central stabilizer of collapsed position.?
During dial plate 1 moves up and down, the sliding block 12 on dial plate 1, which flattens the guide rail 14 on unit 6 along copper rod processing machine, to be slided
It is dynamic, be not in significantly to deviate, guarantee that flattening angle is accurate.
Embodiment 2：
As shown in Figure 10, the present embodiment difference from example 1 is that：It is equipped with one in abutment plate 7 and is parallel to copper
Stick perforation axis for accommodating the copper rod limiting slot 19 of copper rod, the axis of copper rod deflecting angle scale 4 in process can be prevented
Line keeps flattening angle more acurrate.
Above-mentioned specific embodiment cannot function as limiting the scope of the invention, for the technology people of the art
For member, any alternate modification or transformation made to embodiment of the present invention are fallen within the scope of protection of the present invention.
Place is not described in detail by the present invention, is the well-known technique of those skilled in the art of the present technique.
Claims (7)
1. a kind of device for improving copper rod and flattening angle precision, it is characterised in that：Including a dial plate, the bottom of the dial plate
It is connected through a height resetting-mechanism with copper rod processing machine worktable, an installation circular hole is offered on dial plate, in installation circular hole
Interior rotation is equipped with a circular angle scale, perforates at the middle part of angle scale equipped with a copper rod, the center face of the copper rod perforation
Copper rod processing machine flatten unit crush zone center, the surface of angle scale be installed with one perpendicular to angle scale setting against
Plate, the abutment plate with angle scale is concentric rotates, be equal to copper rod to be flattened against plate surface and the vertical range of angle disk center
Radius, a pair of of angle scale turned position is equipped on dial plate into line-locked retaining mechanism, on angle scale circumferencial direction
Graduation mark equipped with instruction central angle, is equipped with a pointer on the dial plate right above angle scale, and the abutment plate is parallel to angle
Zero graduation line on scale.
2. a kind of device for improving copper rod and flattening angle precision according to claim 1, it is characterised in that：In angle dish cart
Face is fixed, and there are two fixing seats, and the two sides of the abutment plate pass through bolt respectively and are connected with fixing seat.
3. a kind of device for improving copper rod and flattening angle precision according to claim 1, it is characterised in that：In abutment plate
The copper rod limiting slot for being used to accommodate copper rod for being parallel to copper rod perforation axis equipped with one.
4. a kind of device for improving copper rod and flattening angle precision according to claim 1, it is characterised in that：The height is multiple
Position mechanism includes the pin that two outer covers are equipped with reset spring, and the top of the pin and the bottom of dial plate are connected, pin
Bottom be pierced by the pin hole setting on copper rod processing machine worktable, flattened between unit in dial plate and copper rod processing machine
Equipped with two guiding mechanisms, the guiding mechanism includes the sliding block for being embedded at pointer back, offers cunning vertically on sliding block
Slot flattens cell surface in copper rod processing machine and is equipped with a guide rail vertically, and the sliding block is embedded at guide rail surface by sliding slot sliding,
Two guiding mechanisms are distributed in the two sides of dial plate.
5. a kind of device for improving copper rod and flattening angle precision according to claim 1, it is characterised in that：In dial plate
Bottom is respectively equipped with a cylindrical groove, is respectively protruding at the top of two pins in two cylindrical grooves and is connected at the top of cylindrical groove.
6. a kind of device for improving copper rod and flattening angle precision according to claim 1, it is characterised in that：The dial plate
On installation circular hole side wall there is an installation circular hole step surface, the angle scale is equipped with and installation circular hole step surface matches
Unit setting is flattened close to copper rod processing machine in angle scale step surface, the biggish side of the installation circular hole step surface internal diameter.
7. a kind of -6 any raising copper rods flatten the device of angle precision according to claim 1, it is characterised in that：It is described
Retaining mechanism includes the clamping screw being inserted on dial plate in screw thread, and the end abutment of the clamping screw is in angle scale
Surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811012207.5A CN108889812B (en) | 2018-08-31 | 2018-08-31 | Device for improving flattening angle precision of copper bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811012207.5A CN108889812B (en) | 2018-08-31 | 2018-08-31 | Device for improving flattening angle precision of copper bar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108889812A true CN108889812A (en) | 2018-11-27 |
| CN108889812B CN108889812B (en) | 2024-02-02 |
Family
ID=64359707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811012207.5A Active CN108889812B (en) | 2018-08-31 | 2018-08-31 | Device for improving flattening angle precision of copper bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108889812B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111715780A (en) * | 2020-07-02 | 2020-09-29 | 江西云泰铜业有限公司 | Device for improving precision of flattening angle of copper bar |
| CN112427457A (en) * | 2020-09-29 | 2021-03-02 | 无锡欣鼎金属制品有限公司 | Special steel pipe perforation positioning process |
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| JPH0539716U (en) * | 1991-11-01 | 1993-05-28 | 日新電機株式会社 | Pipe vendor |
| CN2278435Y (en) * | 1996-07-05 | 1998-04-15 | 山东省文登市整骨医院 | Femoral neck anteversion angle measuring instrument |
| US20090193864A1 (en) * | 2008-02-05 | 2009-08-06 | Bulle Marshall R | Repeatable bender angle apparatus |
| CN202934030U (en) * | 2012-10-23 | 2013-05-15 | 芜湖环球汽车配件有限公司 | Flattening forming die for car rear-axle trailing arm pipe |
| CN203474312U (en) * | 2013-10-08 | 2014-03-12 | 中国十九冶集团有限公司 | Crane |
| CN203853418U (en) * | 2014-03-31 | 2014-10-01 | 南车四方车辆有限公司 | Table-type hand operated tube bender |
| CN106270079A (en) * | 2016-10-14 | 2017-01-04 | 合肥太通制冷科技有限公司 | A kind of aluminum pipe flatting mill |
| CN205887838U (en) * | 2016-08-10 | 2017-01-18 | 淮安优博特健康科技有限公司 | Adjustable return bend flattens shaping frock |
| CN208894920U (en) * | 2018-08-31 | 2019-05-24 | 山东高机工业机械有限公司 | A kind of device for improving copper rod and flattening angle precision |
-
2018
- 2018-08-31 CN CN201811012207.5A patent/CN108889812B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0539716U (en) * | 1991-11-01 | 1993-05-28 | 日新電機株式会社 | Pipe vendor |
| CN2278435Y (en) * | 1996-07-05 | 1998-04-15 | 山东省文登市整骨医院 | Femoral neck anteversion angle measuring instrument |
| US20090193864A1 (en) * | 2008-02-05 | 2009-08-06 | Bulle Marshall R | Repeatable bender angle apparatus |
| CN202934030U (en) * | 2012-10-23 | 2013-05-15 | 芜湖环球汽车配件有限公司 | Flattening forming die for car rear-axle trailing arm pipe |
| CN203474312U (en) * | 2013-10-08 | 2014-03-12 | 中国十九冶集团有限公司 | Crane |
| CN203853418U (en) * | 2014-03-31 | 2014-10-01 | 南车四方车辆有限公司 | Table-type hand operated tube bender |
| CN205887838U (en) * | 2016-08-10 | 2017-01-18 | 淮安优博特健康科技有限公司 | Adjustable return bend flattens shaping frock |
| CN106270079A (en) * | 2016-10-14 | 2017-01-04 | 合肥太通制冷科技有限公司 | A kind of aluminum pipe flatting mill |
| CN208894920U (en) * | 2018-08-31 | 2019-05-24 | 山东高机工业机械有限公司 | A kind of device for improving copper rod and flattening angle precision |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111715780A (en) * | 2020-07-02 | 2020-09-29 | 江西云泰铜业有限公司 | Device for improving precision of flattening angle of copper bar |
| CN112427457A (en) * | 2020-09-29 | 2021-03-02 | 无锡欣鼎金属制品有限公司 | Special steel pipe perforation positioning process |
| CN112427457B (en) * | 2020-09-29 | 2022-07-12 | 无锡欣鼎金属制品有限公司 | Special steel pipe perforation positioning process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108889812B (en) | 2024-02-02 |
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