CN107160304A - A kind of adjustable clamp suitable for various shapes and the space precision parts of size - Google Patents
A kind of adjustable clamp suitable for various shapes and the space precision parts of size Download PDFInfo
- Publication number
- CN107160304A CN107160304A CN201710540399.6A CN201710540399A CN107160304A CN 107160304 A CN107160304 A CN 107160304A CN 201710540399 A CN201710540399 A CN 201710540399A CN 107160304 A CN107160304 A CN 107160304A
- Authority
- CN
- China
- Prior art keywords
- intermediate plate
- articulated elements
- size
- wing
- side wing
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/06—Arrangements for positively actuating jaws
- B25B5/10—Arrangements for positively actuating jaws using screws
- B25B5/103—Arrangements for positively actuating jaws using screws with a hinge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/06—Arrangements for positively actuating jaws
- B25B5/10—Arrangements for positively actuating jaws using screws
- B25B5/109—Arrangements for positively actuating jaws using screws with two screws, e.g. parallel screw clamps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Clamps And Clips (AREA)
Abstract
The invention discloses a kind of adjustable clamp suitable for various shapes and the space precision parts of size, it is made up of intermediate plate, side wing, control panel, leading screw, connecting shaft and propclip.By two intermediate plates as main fixture part, control panel control by leading screw and below changes the clamping force to product in the side wing on intermediate plate both sides.When product size is smaller, using the fixture of side, when product size is larger, the clamp of both sides can be used simultaneously.It can not be applied to clamping any size, the shortcoming of the product of any shape this invention removes plain clamp, the state of fixture can be changed according to size, the profile of product, the scope of application of fixture is increased, improve the operating efficiency in industrial production.
Description
Technical field
A kind of adjustable clamp suitable for various shapes and the space precision parts of size of present invention design, belongs to machine
Tool manufacture field.
Background technology
As the effect that manufacturing industry is played in national economy is increasingly notable, to manufacturing industry requirement also increasingly
It is high.Product clamper is the part directly contacted with workpiece in manufacture system, detecting system, in quality, the reliability of the system of solution
Important function is served in the problems such as detection.
Product clamper can be divided into many kinds according to handling characteristics, such as universal type, specificity type, adjustable type, combined
Deng.Wherein universal type has very big versatility, can preferably adapt to the conversion of manufacturing procedure and processing object.
In the actual machine process of space precision parts, due in tool marks, working angles chip separate when
The friction of plastic deformation, the dither in process system, cutter and surface to be machined etc. reason, can produce product surface
Different degrees of damage.If ametropia, will rise failure when use, it is impossible to use.And on the one hand, in a system
In use workpiece the characteristics of be it is not of uniform size, it is different, due to the uniqueness of product, if using fixed product clip
Tool, it is impossible to suitable for the detection of all products；On the other hand, in actual quality, reliability detection, if using fixation
Fixture, it is necessary to constantly change product clamper so that production, check time increase, reduce production, inspection efficiency.And
And the bad control of clamping force of standard machinery formula fixture, will be to accurate zero if the clamping force to precision parts is excessive
Part causes secondary injury.
The content of the invention
The invention aims to overcome above mentioned problem, it is proposed that a kind of space flight essence suitable for various shapes and size
The design of the adjustable clamp of close parts.The fixture invented is led to by adjusting the position of side wing between product
Cross at least three faces and apply clamping force, make the contact area of product and fixture bigger, ensureing to adapt to product appearance shape size
Under conditions of ensure product clamping stability.
The present invention is applied to the adjustable clamp of various shapes and the space precision parts of size, including two sets of clamping machines
Structure and a set of propclip.Described two sets of clamping devices or so are set, and structure is identical, are respectively provided with intermediate plate, and left with intermediate plate
The side wing that right both sides are hinged；And drive wing plates on two sides to be rotated around jointed shaft by drive mechanism.The propclip is by two
Crossbar is constituted, and two crossbar leading portions are parallel, and is connected between two crossbars by spring；Two crossbar leading portion ends part
Not with being hinged on rear side of the intermediate plate in two sets of clamping devices；Make relative on the inside of the intermediate plate in two sets of clamping devices.
Thus, the side wing by leading screw and control panel control on intermediate plate both sides, which is rotated, can both step up product；And according to
Various sizes of product, with three kinds of method of clamping：When product size is smaller, can by the intermediate plate of unilateral clamping device with
Wing plates on two sides contacts product to be held, common to coordinate clamping；, can be by the centre of unilateral clamping device when product medium size
Plate and wing plates on two sides, and opposite side clamping device intermediate plate product to be held, it is common to coordinate clamping；Work as product size
When larger, product to be held can be contacted with wing plates on two sides by the intermediate plate of sandwich mechanism, it is common to coordinate clamping.
The advantage of the invention is that：
1st, the present invention passes through leading screw control suitable for the adjustable clamp of various shapes and the space precision parts of size
System, can arbitrarily change the clamping force to product；
2nd, the present invention passes through at least three suitable for the adjustable clamp of various shapes and the space precision parts of size
Product is fixed in the contact in face, and this fixed form can increase the frictional force of product and fixture, preferably prevent product in life
Come off during production, inspection adjustment；
3rd, the present invention is suitable for the adjustable clamp of various shapes and the space precision parts of size, the clamping machine of both sides
Structure can both work independently, and can also work simultaneously；Production is improved when both sides work independently, the efficiency of adjustment is checked；
4th, the present invention is applied to the adjustable clamp of various shapes and the space precision parts of size, because side wing exists
It is a range of to rotate freely, make its production, check that the application of adjustment becomes big, can be applied to it is more it is different,
Product not of uniform size.
5th, the present invention is suitable for the adjustable clamp of various shapes and the space precision parts of size, and every piece of side wing can
Disassembled and assembled freely, according to the replaceable various sizes of wing plate of different objects, improves the adaptability of fixture.
Brief description of the drawings
Fig. 1 shows for the present invention suitable for the adjustable clamp integrated model of various shapes and the space precision parts of size
It is intended to；
Fig. 2 is of the invention suitable for various shapes and the space precision parts of size, clamping device schematic diagram；
Fig. 3 is to be of the invention suitable for various shapes and the space precision parts of size, and intermediate plate articulated elements structure is shown
It is intended to；
Fig. 4 is of the invention suitable for various shapes and the space precision parts of size, side wing side articulated elements knot
Structure schematic diagram；
Fig. 5 is of the invention suitable for various shapes and the space precision parts of size, leading screw mounting means schematic diagram；
Fig. 6 shows small-size product method of clamping for the present invention suitable for the space precision parts of various shapes and size
It is intended to；
Fig. 7 holds mode suitable for the space precision parts of various shapes and size for the present invention to medium size product clip
Schematic diagram；
Fig. 8 shows large scale product method of clamping for the present invention suitable for the space precision parts of various shapes and size
It is intended to；
In figure：
1- clamping device 2- propclip 3- supporting tables
101- intermediate plate 102- side wing 103- leading screws
104- control panel 105- connecting shaft 101a- intermediate plate articulated elements
102a- side wings side articulated elements 103a- deep groove ball bearing 103b- front shrouds
103c- back shroud 103d- sliding block 103e- rotary handles
The right pole 203- extension springs of 201- left branching rods 202-
301- vertical rods
Embodiment
The present invention is described in further details below in conjunction with the accompanying drawings.
A kind of adjustable clamp suitable for various shapes and the space precision parts of size, including two sets of clamping devices
1 with a set of propclip 2, as shown in Figure 1.
Two sets of clamping devices 1 structure is identical, including intermediate plate 101, side wing 102, leading screw 103, control panel
104th, connecting shaft 105, as shown in Figure 2.
The intermediate plate 101 is vertically arranged, left and right sides respectively with two sides of the side wing being equally vertically arranged 102
Between be hinged；Specifically articulated manner is：As shown in Figure 3, Figure 4, the middle side edge of intermediate plate 101 is designed with intermediate plate articulated elements 101a,
The middle side edge of side wing 102 is designed with side wing side articulated elements 102a.Wherein, intermediate plate articulated elements 101a is two layers of circle up and down
The fanning strip that 90 degree of heart angle, is vertically arranged with intermediate plate 101, and a straight flange between intermediate plate side with connecting and and middle part perforate.
Side wing side articulated elements 102a is the fanning strip of one layer of 90 degree of central angle, is vertically arranged with side wing 102, a straight flange and side
Wing plate 102 connects between side, and middle part perforate.Thus two layers of intermediate plate above and below side wing side articulated elements 102a insertions is hinged
Between part 101a, after the middle part perforate that intermediate plate articulated elements 101a and side wing side articulated elements 102a is passed through by bolt, in making
Between between plate articulated elements 101a and side wing side articulated elements 102a interference fits connect.Thus, wing plates on two sides 102 is enable freely to revolve
Turn, and intermediate plate articulated elements 101a and side wing side articulated elements 102a design, the rotational angle of side wing 102 is limited,
Make side wing 102 and the angle of intermediate plate 101 only can be adjustable in the range of 60 °~180 ° degree, it is ensured that side wing 102 and intermediate plate
101 angles will not be less than 60 degree or more than 180 degree, cause the damage of device.In above-mentioned clamping device 1 two pieces of side wings 102 with
101 detachables of intermediate plate, according to different products to be held, replaceable various sizes of wing plate.
As shown in figure 5, the leading screw 103 is vertically arranged with intermediate plate 101, positioned at the outside of intermediate plate 101.Leading screw 103 is pushed up
End interference fits are provided with deep groove ball bearing 103a, are installed at the central through hole of intermediate plate 101, made by deep groove ball bearing 103a
Leading screw 103 is freely rotatable.The top end of leading screw 103 is provided with the nut that external diameter is less than deep groove ball bearing 103a external diameters, it is ensured that
Leading screw 103 is in rotary course without departing from deep groove ball bearing 103a.Front shroud 103b and back shroud are also cased with leading screw 103
103c, respectively positioned at deep groove ball bearing 103a both sides, in being individually fixed in front shroud 103b and back shroud 103c by screw
Between the both sides of plate 101, and then realize the positioning between leading screw 103 and intermediate plate 101, and deep groove ball bearing 103a axially position.
Sliding block 103d is threaded with above-mentioned leading screw 103, sliding block 103d passes through screw and the control being placed on leading screw 103
Plate 104 is connected, and the two ends of control panel 104 are connected by connecting shaft 105 with the outside of wing plates on two sides 102, and concrete mode is：Connecting shaft
The control panel articulated elements 104a that the connecting shaft articulated elements 105a of 105 one end end design is designed with the end of control panel 104 is hinged, even
The side wing center that the connecting shaft articulated elements 105a of the other end of spindle 105 design is designed with the lateral surface center of wing plates on two sides 102
Articulated elements 102b is hinged；And the articulated manner between connecting shaft 105 and control panel 104 and side wing 102 and intermediate plate 101 and flank
Receiving delivery system between plate 102 is identical；And then the angle between connecting shaft 105 and side wing 102 and control panel 104 is limited, and then
It further limit the rotational angle of wing plates on two sides 102.
The tip designs of leading screw 103 have rotary handle 103e, by rotating rotary handle 103e, rotate leading screw 103, sliding block
103d is moved axially along leading screw 103, drives control panel 104 to move, and then drives the connecting shaft 105 of both sides is movable to promote two
Side wing 102 is synchronous angularly to be rotated.
Two sets of clamping devices 1 of said structure, left and right is set, and the inner side of intermediate plate 101 is relative, and in two sets of clamping devices 1
Side wing 102 rotate backward.
The propclip 2 includes left branching rod 201, right pole 202 and extension spring 203.Wherein, left branching rod 201 is middle part
With 135 degree of bent rod；Right pole 202 is straight-bar.Left branching rod 201 be arranged in parallel with the right leading portion of pole 202, due to left branching rod
201 be bent rod, then left branching rod 201 intersects with right pole 202 in end, and the end thickness of left branching rod 201 is less than right pole
202 end thickness, and then the bar hole 203 that the right end of pole 202 is axially opened up along right pole is inserted into the end of left branching rod 201
It is interior, and will be connected by connecting shaft 204 between the end of left branching rod 201 and the right end of pole 202, make left branching rod 201 and right pole 202
Between have connecting shaft 204 rotate the free degree.Extension spring 203 is located between left branching rod 201 and the leading portion of right pole 202, two ends
It is connected respectively with left branching rod 201 with right pole 202.Left branching rod 201 and the forward end of right pole 202 are pressed from both sides with the left and right sides respectively
Hold the intermediate plate center connection of mechanism 1；Wherein, interference fits are hinged between left branching rod 201 and intermediate plate 101；And right pole
It is interference fitted and fixes between 202 and intermediate plate 101.And then the position of intermediate plate 101 on right pole 201 is fixed, it is used as datum plate；
And the intermediate plate 102 on left branching rod 202 can swing, portable plate is used as, it is ensured that present clip adapts to the outward appearance of product
Shape.The right tip designs of pole 202 have the installed part with through hole, right pole 202 is enclosed on the vertical rod 301 in supporting table 3
On, right pole 202 and vertical rod 301 are fastened by screw, realize that the installation between whole adjustable clamp and supporting table 3 is fixed.
When adjustable clamp of the present invention is applied, according to the size of product to be held, mobile right pole 202 is in supporting table 3
Vertical position, product to be held is located between the intermediate plate of two sets of clamping devices 1.Then rotated by rotary handle 103e
Leading screw 103 adjusts the angle between two sets of latus inframediums of clamping device 1 and intermediate plate 101, makes both sides during rotational lead screw 103
Wing plate 102 is fitted with product to be held, realizes the clamping of product to be held.In above-mentioned clamping process, treated as shown in fig. 6, working as
, can be only with the clamping device 1 of side to be held when product clamping width is less than the intermediate plate center spacing of two clamping devices 1
Product is clamped, and product to be held is fitted with the intermediate plate 101 of the side clamping device 1, rotated by rotary handle 103e
Leading screw 103, drives connecting shaft 105 to move forward by control panel 104, tightens up side wing 102, passes through intermediate plate 101, wing plates on two sides 102
Common realize is fixedly clamped to clamped product.As shown in fig. 7, when product width to be clamped is more than two clamping devices 1
The middle ware of intermediate plate 101 away from when, during product to be held is placed in the intermediate plate 101 of two sets of clamping devices 1, bullet can be stretched
Spring, is now treated after product clamping clamping by side clamping device 1, by adjust the intermediate plate of opposite side clamping device 1 with
After claming angle between product to be held, by the screen resilience of spring, product to be held is compressed, is prevented only by side clamping machine
Structure 1 can not fix clamping product to be held；If product clamping size is larger, opposite side clamping device 1 can be further adjusted
Wing plates on two sides further clamping product to be held is fixed, as shown in Figure 8.
Claims (8)
1. a kind of adjustable clamp suitable for various shapes and the space precision parts of size, it is characterised in that：Including two
Cover clamping device and a set of propclip；
Described two sets of clamping devices or so are set, and structure is identical, are respectively provided with intermediate plate, and be hinged with the intermediate plate left and right sides
Side wing；And drive wing plates on two sides to be rotated around jointed shaft by drive mechanism；
The propclip is is made up of two crossbars, and two crossbar leading portions are parallel, and pass through spring phase between two crossbars
Even；Two crossbar leading portion ends on rear side of the intermediate plate in two sets of clamping devices respectively with being hinged；Make in two sets of clamping devices
It is relative on the inside of intermediate plate.
2. a kind of adjustable clamp suitable for various shapes and the space precision parts of size as claimed in claim 1, its
It is characterised by：Side wing and intermediate plate angle are adjustable in the range of 60 °~180 °.
3. a kind of adjustable clamp suitable for various shapes and the space precision parts of size as claimed in claim 1, its
It is characterised by：Be respectively adopted between intermediate plate and two crossbar leading portion ends in two sets of clamping devices interference fits be hinged and
Interference fit is fixed.
4. a kind of adjustable clamp suitable for various shapes and the space precision parts of size as claimed in claim 1, its
It is characterised by：The installed part designed by the radicle in two crossbars, is fixedly sheathed in the vertical rod in supporting table.
5. a kind of adjustable clamp suitable for various shapes and the space precision parts of size as claimed in claim 1, its
It is characterised by：Articulated manner between intermediate plate and side wing is：Intermediate plate articulated elements, side wing side are designed with intermediate plate side
Side wing side articulated elements is designed with side；Wherein, the fanning strip of intermediate plate articulated elements two layers of 90 degree of central angle for above and below, with
Between plate be vertically arranged, a straight flange between intermediate plate side with connecting and and middle part perforate；Side wing side articulated elements is one layer of circle
The fanning strip that 90 degree of heart angle, is vertically arranged with side wing, and a straight flange between side wing side with connecting, and middle part perforate；Flank
Above and below the articulated elements insertion of plate side between two layers of intermediate plate articulated elements, cut with scissors by bolt through intermediate plate articulated elements with side wing side
After the middle part perforate of fitting, connect interference fits between intermediate plate articulated elements and side wing side articulated elements.
6. a kind of adjustable clamp suitable for various shapes and the space precision parts of size as claimed in claim 1, its
It is characterised by：Leading screw driving wing plates on two sides mode be：Leading screw end is cased with sliding between intermediate plate by bearing being connected, on leading screw
Block and the control panel fixed with sliding block, control panel two ends are hinged with two connecting shaft one end respectively, two connecting shaft other ends
Respectively with being hinged on the outside of wing plates on two sides.
7. a kind of adjustable clamp suitable for various shapes and the space precision parts of size as claimed in claim 6, its
It is characterised by：Connection shaft end and side wing between articulated manner be：Connection shaft end is designed with connecting shaft articulated elements, side wing
On be designed with articulated elements on the outside of side wing；Wherein, the fanning strip of connecting shaft articulated elements two layers of 90 degree of central angle for above and below, with being connected
Axial end is vertically arranged, and a straight flange connects with being connected axial end, and middle part perforate；Articulated elements is one layer of center of circle on the outside of side wing
The fanning strip that 90 degree of angle, is vertically arranged with side wing, and a straight flange between side wing trailing flank with connecting, and middle part perforate；Flank
On the outside of plate above and below articulated elements insertion between two layers of intermediate plate articulated elements, by bolt through intermediate plate articulated elements with being cut with scissors on rear side of side wing
After the middle part perforate of fitting, make interference fits connection between articulated elements on rear side of intermediate plate articulated elements and side wing.
8. a kind of adjustable clamp suitable for various shapes and the space precision parts of size as claimed in claim 1, its
It is characterised by：With three kinds of method of clamping：
A, the intermediate plate by unilateral clamping device contact product to be held with wing plates on two sides, common to coordinate clamping；
B, intermediate plate and wing plates on two sides by unilateral clamping device, and the intermediate plate of opposite side clamping device are to be held
Product, it is common to coordinate clamping；
C, the intermediate plate by sandwich mechanism contact product to be held with wing plates on two sides, common to coordinate clamping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710540399.6A CN107160304B (en) | 2017-07-05 | 2017-07-05 | A kind of adjustable clamp suitable for various shapes and the space precision components of size |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710540399.6A CN107160304B (en) | 2017-07-05 | 2017-07-05 | A kind of adjustable clamp suitable for various shapes and the space precision components of size |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107160304A true CN107160304A (en) | 2017-09-15 |
| CN107160304B CN107160304B (en) | 2019-08-13 |
Family
ID=59822717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710540399.6A Expired - Fee Related CN107160304B (en) | 2017-07-05 | 2017-07-05 | A kind of adjustable clamp suitable for various shapes and the space precision components of size |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107160304B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108482794A (en) * | 2018-03-28 | 2018-09-04 | 龙信集团江苏建筑产业有限公司 | A kind of prefabricated board intelligent commodity shelf |
| CN109013106A (en) * | 2018-09-07 | 2018-12-18 | 曾金玉 | It is a kind of convenient for fixed tubular material processing rotating device |
| TWI689386B (en) * | 2019-06-27 | 2020-04-01 | 和碩聯合科技股份有限公司 | Clamping device |
| CN113770130A (en) * | 2021-09-16 | 2021-12-10 | 泛凯斯特汽车零部件(江苏)有限公司 | Pipe fitting inner wall cleaning device for nodular cast iron and using method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1987001643A1 (en) * | 1985-09-16 | 1987-03-26 | Miller Clamps Gesellschaft M.B.H. | Clamp |
| CN1049469A (en) * | 1989-08-12 | 1991-02-27 | 徐庭中 | Universal propping and pulling tool |
| US5356124A (en) * | 1993-10-25 | 1994-10-18 | Ai Yu Fang | Adjustable clamp fixture with multi-directional opening |
| CN203509978U (en) * | 2013-07-12 | 2014-04-02 | 嘉兴乾昆工业设计有限公司 | Part clamping mechanism |
| CN204843910U (en) * | 2015-06-28 | 2015-12-09 | 芜湖创智机械技术有限公司 | Fine motion power automobile plate holder |
| CN205734530U (en) * | 2016-06-16 | 2016-11-30 | 南安上远玻璃有限公司 | A kind of glass cutting machine auxiliary clamping device |
| CN206029640U (en) * | 2016-07-04 | 2017-03-22 | 张家界航空工业职业技术学院 | Automatic production line clamping device |
-
2017
- 2017-07-05 CN CN201710540399.6A patent/CN107160304B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1987001643A1 (en) * | 1985-09-16 | 1987-03-26 | Miller Clamps Gesellschaft M.B.H. | Clamp |
| CN1049469A (en) * | 1989-08-12 | 1991-02-27 | 徐庭中 | Universal propping and pulling tool |
| US5356124A (en) * | 1993-10-25 | 1994-10-18 | Ai Yu Fang | Adjustable clamp fixture with multi-directional opening |
| CN203509978U (en) * | 2013-07-12 | 2014-04-02 | 嘉兴乾昆工业设计有限公司 | Part clamping mechanism |
| CN204843910U (en) * | 2015-06-28 | 2015-12-09 | 芜湖创智机械技术有限公司 | Fine motion power automobile plate holder |
| CN205734530U (en) * | 2016-06-16 | 2016-11-30 | 南安上远玻璃有限公司 | A kind of glass cutting machine auxiliary clamping device |
| CN206029640U (en) * | 2016-07-04 | 2017-03-22 | 张家界航空工业职业技术学院 | Automatic production line clamping device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108482794A (en) * | 2018-03-28 | 2018-09-04 | 龙信集团江苏建筑产业有限公司 | A kind of prefabricated board intelligent commodity shelf |
| CN109013106A (en) * | 2018-09-07 | 2018-12-18 | 曾金玉 | It is a kind of convenient for fixed tubular material processing rotating device |
| TWI689386B (en) * | 2019-06-27 | 2020-04-01 | 和碩聯合科技股份有限公司 | Clamping device |
| CN113770130A (en) * | 2021-09-16 | 2021-12-10 | 泛凯斯特汽车零部件(江苏)有限公司 | Pipe fitting inner wall cleaning device for nodular cast iron and using method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107160304B (en) | 2019-08-13 |
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Granted publication date: 20190813 Termination date: 20200705 |