CN209140010U - A kind of tapping machine of hub plate - Google Patents

A kind of tapping machine of hub plate Download PDF

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Publication number
CN209140010U
CN209140010U CN201822089326.2U CN201822089326U CN209140010U CN 209140010 U CN209140010 U CN 209140010U CN 201822089326 U CN201822089326 U CN 201822089326U CN 209140010 U CN209140010 U CN 209140010U
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CN
China
Prior art keywords
hub plate
positioning column
hub
pedestal
block
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Active
Application number
CN201822089326.2U
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Chinese (zh)
Inventor
秦晓昌
秦宬
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Pinghu Sunburn Machinery Manufacturing Co Ltd
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Pinghu Sunburn Machinery Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
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Publication date
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Priority to CN201822089326.2U priority Critical patent/CN209140010U/en
Application granted granted Critical
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Active legal-status Critical Current
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Abstract

The utility model relates to a kind of tapping machines of hub plate, belong to intermetallic composite coating ancillary equipment field, it includes lathe and the chasing bar for being set to lathe, the lathe is equipped with workbench, the workbench is equipped with fixture towards the side of chasing bar, be characterized in that: the fixture includes for installing the pedestal of hub plate and being fixedly installed on the positioning column of base center, the positioning column runs through interior hub hub core, it is equipped with inside the positioning column and adjusts component, it is described to adjust the conflict block being slidably connected including muti-piece and positioning column, through conflict block and the gag lever post that is slidably connected with conflict block, it is fixed inside one end of the more gag lever posts and positioning column, the positioning column peripheral wall corresponds to conflict block equipped with sliding slot.The utility model proposes a kind of hub plate tapping machine, by setting fixture to hub plate carry out stable holding, to improve the tapping precision of hub plate.

Description

A kind of tapping machine of hub plate
Technical field
The utility model relates to intermetallic composite coating ancillary equipment fields, more particularly, to a kind of tapping machine of hub plate.
Background technique
Hub plate is one of the important component of clutch secondary part, is made of ring flange and interior hub two parts, existing Some hub plates have integral structure and two kinds of two-part structure, and wherein integral structure refers to ring flange and interior hub by stick Material is integrally formed by processing, and two-part hub is to be assembled into an entirety after having produced ring flange and interior hub respectively. Referring to Fig.1, the hub plate 5 being an integral structure, including the triangle ring flange 51 of outer ring is arranged in and is set in center Hub 52 needs to open up screw thread on three tops of triangle ring flange 51 according to installation needs of the hub plate 5 on driven disc Hole 511.
It is the receiving maximum part of load in clutch since hub plate is the important composition component in clutch, it The whole torques transmitted by engine are almost born, therefore its required precision is higher than common zero to hub plate in process of production The production requirement of part.In the tapping process of hub plate, hub plate needs to be fixed on lathe, and traditional lathe can correspond to Setting station or claw workpiece is gripped, and general station can only the position to workpiece simply limited, no It is fixed after capable of being accurately positioned;And claw is too big to the chucking power of workpiece, workpiece centre is sky, and excessive chucking power will lead to workpiece Deformation, to influence the precision of workpiece.
Therefore the clamping for needing to provide the new technical solution of one kind to solve the problems, such as lathe to hub plate.
Utility model content
The purpose of the utility model is to provide a kind of tapping machines of hub plate, are carried out by setting fixture to hub plate Stable holding, to improve the tapping precision of hub plate.
The above-mentioned purpose of utility model of the utility model has the technical scheme that
A kind of tapping machine of hub plate, including lathe and the chasing bar for being set to lathe, the lathe is equipped with work Make platform, the workbench is equipped with fixture towards the side of chasing bar, and the fixture includes the pedestal for installing hub plate With the positioning column for being fixedly installed on base center, the positioning column runs through interior hub hub core, is equipped with and adjusts inside the positioning column Component, it is described adjust include muti-piece and positioning column be slidably connected conflict block, be slidably connected through conflict block and with conflict block Gag lever post, one end of the more gag lever posts and positioning column inside are fixed, and the positioning column peripheral wall corresponds to conflict block equipped with sliding slot.
By using above-mentioned technical proposal, tapping is carried out to hub plate by setting chasing bar, is installed on workbench For the fixture of hub plate to be fixedly mounted, hub plate is installed by the way that pedestal is arranged, positioning column runs through hub plate So that position of the hub plate on pedestal is restricted;Component is adjusted using conflict block and hub plate hub in-core by setting The frictional force of wall is so that hub plate is stably fixed on pedestal, by the way that the conflict block with positioning column sliding is arranged, When hub plate needs are fixed on pedestal, slided towards hub plate inner wall so that conflict block in sliding slot by conflict block It is contradicted with hub plate inner wall;It is slided when by the way that gag lever post is arranged conflict block being slided in sliding slot with gag lever post, limitation is supported It is arbitrarily slided in contact block sliding slot, stability of the hub plate when fixing on pedestal is realized, to improve the tapping of hub plate Precision.
The utility model is further arranged to: the more gag lever posts are inclined to set, and the more gag lever posts are away from fixed One end of position column is fixedly connected with screw rod jointly, and the screw rod and positioning column are rotatablely connected, and the wire rod thread is connected with sliding block, The sliding block is slidably connected with multiple conflict blocks.
By using above-mentioned technical proposal, more gag lever posts connect jointly and screw rod, are arranged sliding block on screw rod, sliding block with Multiple conflict blocks are slidably connected so that being limited and can only be slided along the axial movement of screw rod by conflict block when sliding block is rotated with screw rod Block is connect with conflict block so that the sliding of sliding block drives conflict block to slide on gag lever post;Since gag lever post is obliquely installed so that supporting When sliding on contact block gag lever post, the spacing between conflict block and screw rod changes with the sliding of conflict block, realizes conflict block in cunning Sliding in slot, to realize the adjusting for adjusting component.
The utility model is further arranged to: the gag lever post is four, and four gag lever posts are along the circumferential equal of screw rod Even interval setting, is equipped with connecting rod, one end of the connecting rod is fixedly connected with a slide block, described between the sliding block and conflict block Connecting rod is slidably connected through conflict block with conflict block away from one end of sliding block.
By using above-mentioned technical proposal, since conflict block is slidably arranged on gag lever post, conflict block and hub plate hub In-core wall contradicts, and for the stability that guarantee hub plate is installed on pedestal, conflict block number is The more the better, due in positioning column The space in portion is limited, and the number of conflict block is restricted, and four conflict blocks is arranged, and the circumferential direction due to gag lever post along screw rod is arranged So that conflict block is arranged along the circumferential direction of positioning column, so that hub plate stable can be clamped by positioning column;Pass through setting Connecting rod makes the sliding of sliding block that conflict block be driven to slide on screw rod, since gag lever post is obliquely installed, so that conflict block is limiting When sliding on the bar of position, the spacing of conflict block and screw rod constantly changes, and connecting rod is slidably connected with conflict block so that connecting rod is set Set the sliding that will not influence conflict block.
The utility model is further arranged to: the pedestal along its it is circumferentially-spaced offer three notches, three described to lack Mouth is corresponding with three tops of ring flange, and the side of the pedestal towards positioning column corresponds to hub plate and offers limiting slot.
By using above-mentioned technical proposal, due to when hub plate, which needs to start three threaded hole setting notches, avoids tapping Make chasing bar impaired since pedestal is contacted with chasing bar, makes the outer of pedestal and hub plate by the way that limiting slot is arranged Side wall fitting, so that hub plate is more stable in tapping process.
The utility model is further arranged to: the chasing bar includes the rack and fixed setting for being fixedly installed on lathe In the drill chuck of frame top, the drill chuck is set towards fixture side there are three screw tap, and three screw taps are located at three Right above a notch.
By using above-mentioned technical proposal, since hub plate needs to start three threaded holes, by the way that chasing bar is arranged, Corresponding three notches of three screw taps are set on drill chuck, tapping is synchronized to hub plate, so that hub plate is in aperture It is more uniformly stressed, improves tapping precision.
The utility model is further arranged to: the fixture further includes bottom plate, and the pedestal is fixedly connected with bottom plate, described The both ends of bottom plate along its length, which are spaced apart, is equipped with multiple location holes, and the location hole, which runs through, pilot pin, the pilot pin It is threadedly coupled with workbench.
By using above-mentioned technical proposal, by the way that bottom plate is arranged pedestal is fixed with bottom plate, bottom plate passes through with workbench Pilot pin is fixed, and fixture is facilitated to replace when damaging to fixture.
The utility model is further arranged to: the side of the pedestal is equipped with limit base, and the height of the limit base is higher than Pedestal, the limit base offer U-type groove towards one of notch, the U-type groove be connected with notch and with ring flange Top matches.
By using above-mentioned technical proposal, pass through setting limit base and open up the U-type groove being connected with notch, realize to from The quick positioning of Moving plate hub.
The utility model is further arranged to: one end protruding positioning pole of the screw rod far from pedestal and its end is hinged with Shaft, the screw rod offer card slot towards shaft rotation direction, and the shaft lateral wall and card slot inner wall are clamped.
By using above-mentioned technical proposal, screw rod rotation is driven by setting shaft, realizes the sliding of sliding block, so that Conflict block is slided in sliding slot hiccup;For hub core due to hub plate through being set on positioning column, the diameter of positioning column is small In the diameter of hub plate hub core, set of the shaft influence hub plate on positioning column is avoided simultaneously for convenience of the rotation of screw rod If shaft is hinged with screw rod, when picking and placing hub plate, the axle center after shaft rotation is conllinear with the axle center of screw rod;By setting Card slot is set, when shaft and card slot clamping, shaft is fixed by card slot side wall and hinge joint, to reduce the damage of shaft Consumption, extends the service life of shaft.
The utility model is further arranged to: restraining position ring block is coaxially fixed at the both ends of the screw rod, and the sliding block is placed in two Between a stop collar.
By using above-mentioned technical proposal, it is placed in inside positioning column in adjusting component, sliding position of the sliding block on screw rod Cannot from outside directly from, the sliding of sliding block is limited by the way that stop collar is arranged, it is sliding when sliding block and limited block contradict The rotation that block stops sliding shaft being restricted, and is intuitively reacted by the situation that shaft rotates the position of sliding block, thus Save the regulating time for adjusting component.
In conclusion the advantageous effects of the utility model are as follows: carry out tapping folder to hub plate by setting fixture It holds, to guarantee being kept fixed in tapping process hub plate, improves the tapping precision of hub plate;It is adjusted by setting Component enables hub plate according to fixation or release of the adjusting of component on positioning column is adjusted, and facilitates hub plate the bottom of at The pick-and-place of seat;Fixture is set and being detachably connected for workbench facilitates fixture to replace when damaging to fixture.
Detailed description of the invention
Fig. 1 is the metalwork for needing to process proposed in background technique;
Fig. 2 is the overall structure diagram of the utility model;
Fig. 3 is the partial structure diagram of the utility model, mainly shows the connection relationship between fixture each section;
Fig. 4 is the partial structure diagram of the utility model, mainly shows the positional relationship of fixture and screw tap;
Fig. 5 is the part explosive view of the utility model, mainly shows the connection relationship between fixture and tooling platform;
Fig. 6 is the portion A enlarged drawing in Fig. 4.
In figure, 1, lathe;2, chasing bar;21, rack;22, drill chuck;23, screw tap;3, workbench;4, fixture;41, Pedestal;411, notch;412, limiting slot;42, positioning column;421, sliding slot;43, component is adjusted;431, conflict block;432, it limits Bar;433, screw rod;4331, card slot;434, sliding block;435, connecting rod;436, shaft;437, stop collar;44, limit base;441,U Type groove;45, connecting plate;451, location hole;452, pilot pin;5, hub plate;51, ring flange;511, threaded hole;52, inner disc Hub.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
Embodiment:
It is a kind of tapping machine of hub plate disclosed by the utility model referring to Fig. 2, including lathe 1, is set to lathe 1 Chasing bar 2 and workbench 3, workbench 3 be equipped with fixture 4 towards the side of chasing bar 2, by the way that hub plate 5 is fixed It is mounted on fixture 4, chasing bar 2 carries out aperture to hub plate 5.
Referring to Fig.1, wherein chasing bar 2 include with lathe 1 be fixedly installed rack 21 and be fixedly installed on rack 21 top The drill chuck 22 in portion, since hub plate 5 needs to start three threaded holes 511, to guarantee that the stress in aperture of hub plate 5 is equal Even, drill chuck 22 is set towards 4 side of fixture there are three screw tap 23, and three screw taps 23 are according to the side of 5 upper screwed hole 511 of hub plate The corresponding arrangement in position.When chasing bar 2 carries out tapping to hub plate 5, three screw taps 23 synchronize out hub plate 5 Tapping precision is improved in hole.
Referring to Fig. 2 and Fig. 3, fixture 4 includes for installing the pedestal 41 of hub plate 5 and being fixedly installed on 41 center of pedestal Positioning column 42, positioning column 42 run through interior 52 hub core of hub, pedestal 41 for place hub plate 5 and to hub plate 5 provide Support force, positioning column 42 are restricted position of the hub plate 5 on pedestal 41 through hub plate 5.Pedestal 41 is along it It is circumferentially-spaced to offer three notches 411, the central axes of three notches 411 axis collinear and notch with three screw taps 23 respectively 411 diameter is greater than the diameter of screw tap 23, avoids contacting due to pedestal 41 with chasing bar 2 when tapping by the way that notch 411 is arranged And make chasing bar 2 impaired.
Fixture 4 is repaired and replaced when for convenience of the damage of fixture 4 referring to Fig. 2 and Fig. 5, fixture 4 further includes bottom plate, Pedestal 41 is fixedly connected with bottom plate, and the both ends of bottom plate along its length are spaced apart to be equipped in multiple location hole 451(figures and be shown as Four), location hole 451, which runs through, pilot pin 452 and pilot pin 452 is threadedly coupled with workbench 3;Pass through setting bottom plate and work The detachable setting of platform 3 facilitates fixture 4 to replace when damaging to fixture 4.
Referring to Fig. 3, to guarantee that hub plate 5 is more stable in tapping process, pedestal 41 is towards the side of positioning column 42 Corresponding hub plate 5 offers limiting slot 412, and limiting slot 412 is bonded with the lateral wall of hub plate 5 so that hub plate 5 and Pedestal 41 fits closely, and in 5 stress of hub plate, hub plate 5 can be uniformly transferred pressure to pedestal 41;It opens up simultaneously Limiting slot 412 can facilitate installation of the hub plate 5 on pedestal 41.To guarantee that hub plate 5 can be wanted quickly according to tapping It asks and is mounted on pedestal 41, the side of pedestal 41 is equipped with limit base 44, and the height of limit base 44 is higher than pedestal 41,44 court of limit base A notch 411 offers U-type groove 441U thereto, and U-type groove 441U is connected with notch 411 and the top phase with ring flange 51 Cooperation realizes the quick positioning to hub plate 5 by the way that one end of ring flange 51 to be aligned with U-type groove 441U.
Adjusting group is equipped in positioning column 42 to guarantee that hub plate 5 keeps stablizing in tapping process referring to Fig. 4 and Fig. 6 Part 43, adjusting component 43 includes the conflict block 431 and run through sliding block 434 and and conflict block that muti-piece and positioning column 42 are slidably connected 431 gag lever posts 432 being slidably connected, one end of gag lever post 432 are fixedly connected with the inside of positioning column 42, more gag lever posts 432 It is inclined to set, more gag lever posts 432 are fixedly connected with screw rod 433 away from one end of positioning column 42 jointly, and 433 screw thread of screw rod connects It is connected to sliding block 434, and sliding block 434 and conflict block 431 are slidably connected.
Be equipped with connecting rod 435 referring to Fig. 6, between sliding block 434 and conflict block 431 makes since gag lever post 432 is obliquely installed Conflict block 431 is obtained when sliding on gag lever post 432, conflict block 431 and the spacing of screw rod 433 constantly change, to avoid connecting rod 435 setting influences sliding of the conflict block 431 on gag lever post 432, and one end of connecting rod 435 is fixedly connected with sliding block 434, even Extension bar 435 is slidably connected through conflict block 431 with conflict block 431 away from one end of sliding block 434.Due to the sky inside positioning column 42 Between it is limited, the number of conflict block 431 is restricted, to guarantee the stability that connect with hub plate 5 of positioning column 42, gag lever post 432 is four and four gag lever posts 432 are arranged along the circumferential uniform intervals of screw rod 433, so that being mounted on supporting on gag lever post 432 Contact block 431 can be evenly spaced on.
Referring to Fig. 3 and Fig. 6, corresponding four conflict blocks 431 of 42 peripheral wall of positioning column open up that there are four sliding slots 421, when screw rod 433 When rotation, the spacing between conflict block 431 and screw rod 433 changes with the sliding of conflict block 431, and conflict block 431 is in sliding slot 421 Interior sliding.Since conflict block 431 is connect with sliding block 434, sliding block 434 moves on screw rod 433, and screw rod 433 has lock function, When screw rod 433 stops operating, the position on gag lever post 432 of conflict block 431 is fixed, thus guarantee conflict block 431 with from The hub in-core wall of Moving plate hub 5 is fixed to be contradicted.
Referring to Fig. 6, for convenience of the rotation of screw rod 433, one end protruding positioning pole 42 of the screw rod 433 far from pedestal 41 and its end Portion is equipped with shaft 436, by rotating shaft 436 screw rod 433 is rotated, to realize cunning of the conflict block 431 in sliding slot 421 It is dynamic.Since the peripheral wall of positioning column 42 and the inner wall of metalwork contradict, pressed from both sides to avoid the installation of shaft 436 from influencing hub plate 5 Installation on tool 4, shaft 436 and the end of screw rod 433 are hinged;Axis when picking and placing hub plate 5, after the rotation of shaft 436 The heart is conllinear with the axle center of screw rod 433.
Referring to Fig. 6, when to avoid shaft 436 from rotating, cause shaft 436 impaired due to hinged place stress, 433 court of screw rod Card slot 4331 is offered to 436 rotation direction of shaft, 436 lateral wall of shaft and 4331 inner wall of card slot are clamped, when shaft 436 needs When rotation, shaft 436 is fixed by 4331 side wall of card slot and hinge joint, reduction shaft 436 is hinged with positioning column 42 The stress at place extends the service life of shaft 436 to reduce the loss of shaft 436.
Referring to Fig. 3 and Fig. 6, it is placed in inside positioning column 42 due to adjusting component 43, sliding of the sliding block 434 on screw rod 433 Position cannot from outside directly from, restraining position ring block 437 is coaxially fixed at the both ends of screw rod 433, and sliding block 434 is placed in two stop collars Between 437;The sliding of sliding block 434 is limited by the way that stop collar 437 is arranged, it is sliding when sliding block 434 and the conflict of stop collar 437 The rotation that block 434 stops sliding shaft 436 is restricted, and the situation rotated by shaft 436 carries out the position of sliding block 434 straight Reaction is seen, to save the regulating time for adjusting component 43.
The implementation principle of the present embodiment are as follows: by being set on locating shaft for hub plate 5, and make one end of ring flange 51 It is contradicted with U-type groove 441U, so that the lower end surface of hub plate 5 is connected in limiting slot 412, then rotating shaft 436 makes It obtains sliding block 434 to slide on screw rod 433, sliding block 434 drives conflict block 431 mobile by connecting rod 435,431 direction of conflict block The hub in-core wall of interior hub 52 slides in sliding slot 421, so that inner wall of four conflict blocks 431 with hub plate 5 supports Hub plate 5 and the fixed clamping of positioning column 42 are realized in touching.Driving chasing bar 2 moves downward screw tap 23 and to driven disc Hub 5 carries out tapping;After tapping, rotating shaft 436 removes metalwork, then will need the hub plate 5 of tapping again Fixed to the tapping on fixture 4, carrying out next hub plate 5, successively by tapping complete hub plate 5 remove after again into The installation of the hub plate 5 of the non-tapping of row, such cyclic process.
The embodiment of specific embodiment is the preferred embodiment of the utility model, not limits the utility model according to this Protection scope, therefore: it is practical new should all to be covered by this for the equivalence changes that all structures, shape, principle according to the utility model are done Within the protection scope of type.

Claims (9)

1. a kind of tapping machine of hub plate, including lathe (1) and it is set to the chasing bar (2) of lathe (1), the lathe (1) workbench (3) are equipped with, the workbench (3) is equipped with fixture (4) towards the side of chasing bar (2), it is characterised in that: The fixture (4) includes for installing the pedestal of hub plate (5) (41) and being fixedly installed on the positioning column at pedestal (41) center (42), the positioning column (42) runs through interior hub (52) hub core, is equipped with inside the positioning column (42) and adjusts component (43), described Adjust include muti-piece and positioning column (42) be slidably connected conflict block (431), through conflict block (431) and with conflict block (431) The gag lever post (432) being slidably connected, one end and positioning column (42) of the more gag lever posts (432) are internal fixed, the positioning Column (42) peripheral wall corresponds to conflict block (431) equipped with sliding slot (421).
2. a kind of tapping machine of hub plate according to claim 1, it is characterised in that: the more gag lever posts (432) It is inclined to set, the more gag lever posts (432) are fixedly connected with screw rod (433), institute away from the one end of positioning column (42) jointly It states screw rod (433) and positioning column (42) to be rotatablely connected, the screw rod (433) is threaded with sliding block (434), the sliding block (434) it is slidably connected with multiple conflict blocks (431).
3. a kind of tapping machine of hub plate according to claim 2, it is characterised in that: the gag lever post (432) is four Root, four gag lever posts (432) are arranged along the circumferential uniform intervals of screw rod (433), the sliding block (434) and conflict block (431) connecting rod (435) are equipped between, one end of the connecting rod (435) is fixedly connected with sliding block (434), the connecting rod (435) one end away from sliding block (434) is slidably connected through conflict block (431) with conflict block (431).
4. a kind of tapping machine of hub plate according to claim 1, it is characterised in that: the pedestal (41) is along its circumferential direction It is spaced apart there are three setting notch (411), three notches (411) are corresponding with three tops of ring flange (51), the pedestal (41) hub plate (5) is corresponded to towards the side of positioning column (42) offer limiting slot (412).
5. a kind of tapping machine of hub plate according to claim 4, it is characterised in that: the chasing bar (2) includes The drill chuck (22) for being fixedly installed on the rack (21) of lathe (1) and being fixedly installed at the top of rack (21), the drill chuck (22) set towards fixture (4) side there are three screw tap (23), three screw taps (23) be located at three notches (411) just on Side.
6. a kind of tapping machine of hub plate according to claim 1, it is characterised in that: the fixture (4) further includes bottom Plate, the pedestal (41) are fixedly connected with bottom plate, and the both ends of the bottom plate along its length, which are spaced apart, is equipped with multiple location holes (451), through having pilot pin (452), the pilot pin (452) is threadedly coupled the location hole (451) with workbench (3).
7. a kind of tapping machine of hub plate according to claim 4, it is characterised in that: the side of the pedestal (41) is set Have limit base (44), the height of the limit base (44) is higher than pedestal (41), and the limit base (44) is towards one of notch (411) it offers U-type groove (441U), the U-type groove (441U) is connected with notch (411) and the top phase with ring flange (51) Cooperation.
8. a kind of tapping machine of hub plate according to claim 3, it is characterised in that: the screw rod (433) is the bottom of far from One end protruding positioning pole (42) of seat (41) and its end is hinged with shaft (436), the screw rod (433) is towards shaft (436) Rotation direction offers card slot (4331), and shaft (436) lateral wall and card slot (4331) inner wall are clamped.
9. a kind of tapping machine of hub plate according to claim 8, it is characterised in that: the both ends of the screw rod (433) Coaxial fixed restraining position ring block (437), the sliding block (434) are placed between two stop collars (437).
CN201822089326.2U 2018-12-13 2018-12-13 A kind of tapping machine of hub plate Active CN209140010U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201822089326.2U CN209140010U (en) 2018-12-13 2018-12-13 A kind of tapping machine of hub plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201822089326.2U CN209140010U (en) 2018-12-13 2018-12-13 A kind of tapping machine of hub plate

Publications (1)

Publication Number Publication Date
CN209140010U true CN209140010U (en) 2019-07-23

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ID=67289979

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201822089326.2U Active CN209140010U (en) 2018-12-13 2018-12-13 A kind of tapping machine of hub plate

Country Status (1)

Country Link
CN (1) CN209140010U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111515477A (en) * 2020-04-29 2020-08-11 陈成任 Tapping equipment for threaded hole of metal connecting piece

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111515477A (en) * 2020-04-29 2020-08-11 陈成任 Tapping equipment for threaded hole of metal connecting piece

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