CN112620559A - Take cutting off thread rolling machine of punching press mechanism - Google Patents

Take cutting off thread rolling machine of punching press mechanism Download PDF

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Publication number
CN112620559A
CN112620559A CN202011492385.XA CN202011492385A CN112620559A CN 112620559 A CN112620559 A CN 112620559A CN 202011492385 A CN202011492385 A CN 202011492385A CN 112620559 A CN112620559 A CN 112620559A
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CN
China
Prior art keywords
chamber
thread rolling
punching
lower extreme
connection
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.)
Pending
Application number
CN202011492385.XA
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Chinese (zh)
Inventor
杨井虎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taicang Qiwei Metal Products Co ltd
Original Assignee
Taicang Qiwei Metal Products 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.)
Filing date
Publication date
Application filed by Taicang Qiwei Metal Products Co ltd filed Critical Taicang Qiwei Metal Products Co ltd
Priority to CN202011492385.XA priority Critical patent/CN112620559A/en
Publication of CN112620559A publication Critical patent/CN112620559A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21HMAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00Making helical bodies or bodies having parts of helical shape
    • B21H3/02Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/06Making by means of profiled members other than rolls, e.g. reciprocating flat dies or jaws, moved longitudinally or curvilinearly with respect to each other
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02Cleaning by the force of jets or sprays
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04Cleaning involving contact with liquid
    • B08B3/10Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • B08B3/14Removing waste, e.g. labels, from cleaning liquid; Regenerating cleaning liquids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D31/00Other cooling or freezing apparatus

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Abstract

The invention discloses a cutting-off thread rolling machine with a punching mechanism, which belongs to the field of thread rolling machines and comprises an operating platform, wherein two sides of the upper end of the operating platform are respectively provided with a baffle plate, the left part of the upper end of the operating platform is provided with a fixed plate, the upper end of the fixed plate is provided with a punching chamber, the top end in the punching chamber is provided with a punching machine, the lower end of the punching machine is provided with a punching head, the middle part of the upper end of the operating platform is provided with a thread rolling chamber, four corners of the lower end of the thread rolling chamber are respectively provided with a fixed block, the lower end of each fixed block is fixedly connected with the operating platform, the right side wall in the thread rolling chamber is connected with a screw rod, the front end of the screw rod is provided with; in the invention, liquid enters the tooth rubbing chamber from the water outlet to clean materials, so that the temperature reduction treatment is completed, scalding to hands is avoided, and potential safety hazards are prevented.

Description

Take cutting off thread rolling machine of punching press mechanism
Technical Field
The invention relates to the field of thread rolling machines, in particular to a cutting thread rolling machine with a stamping mechanism.
Background
A thread rolling machine is a processing device for the outer surface of a cylindrical workpiece. The thread rolling surfaces are two same thread shapes with the same spiral angle as the thread shape of the bolt thread, and the bolt blank between the two thread rolling plates is rolled into the thread when the thread rolling plates move mutually. The thread rolling plate is processed one bolt thread at a time, and the speed is quite high. The thread rolling is mainly used for processing small bolts. Summarizing, the thread rolling is to process the outer surface of the cylindrical workpiece.
In the prior art, when a cutting and tooth rubbing machine is operated, high temperature is generated, and when a high-temperature finished product is taken, the hand is scalded, so that potential safety hazards are caused; the cutting thread rolling machine can generate residues during operation, the residues can pollute the table top, influence the thread rolling operation, bring inconvenience and reduce the operation efficiency.
Disclosure of Invention
The invention aims to provide a cutting thread rolling machine with a stamping mechanism, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a cutting-off thread rolling machine with a punching mechanism comprises an operating platform, wherein two sides of the upper end of the operating platform are respectively provided with a baffle plate, the left part of the upper end of the operating platform is provided with a fixed plate, the upper end of the fixed plate is provided with a punching chamber, the top end in the punching chamber is provided with a punching machine, the lower end of the punching machine is provided with a punching head, the middle part of the upper end of the operating platform is provided with a thread rolling chamber, four corners of the lower end of the thread rolling chamber are respectively provided with a fixed block, the lower end of the fixed block is fixedly connected with the operating platform, the right side wall in the thread rolling chamber is connected with a screw rod, the front end of the screw rod penetrates through the thread rolling chamber to be connected with a belt, the right part in the belt is provided with a rotating shaft, the front end of the rotating shaft is provided with a rotating motor, the fixed chamber upper end is connected with the connecting pipe, the connecting pipe lower extreme is connected with the delivery port, rub the tooth room right side and install the spray chamber, the spray chamber front end is provided with the scale mark, the case lid is installed to the spray chamber upper end, case lid upper end mid-mounting has fixed lid, the storage water tank is installed to the indoor bottom of spray chamber, connecting pipe upper end and spray chamber left side intercommunication, the water pump is installed on connecting pipe upper portion, rub the tooth room right-hand member and install the swash plate, swash plate lower extreme and operation panel fixed connection, the collection.
As a further scheme of the invention: first locking bolt is all installed to case lid upper end four corners department, and first locking bolt lower extreme all rotates with the case lid to be connected, and first locking bolt is convenient fixes the case lid, provides convenient.
As a further scheme of the invention: control panel is installed to the surge-chamber upper end, control panel all with punching machine, water pump and rotation motor electric connection, control panel controls the electrical apparatus of device, conveniently carries out the operation.
As a further scheme of the invention: the utility model discloses a high altitude construction device, including operation panel, connecting chamber, connecting bolt, connecting block, connecting chamber lower extreme, connecting chamber lower extreme, last connecting chamber all with connecting chamber inside sliding connection down, second locking bolt is all installed on lower connecting chamber front end upper portion, second locking bolt all rotates with lower connecting chamber to be connected, the connecting block is all installed to lower connecting chamber lower extreme, adjust the height between connecting chamber and the lower connecting chamber, after the altitude determination is good, lock second locking bolt, thereby realize the not regulation of device co-altitude, it is convenient to bring.
As a further scheme of the invention: the buffer board is installed to the fixed plate upper end, and buffer board lower extreme and fixed plate fixed connection, the buffer board carries out the shock attenuation to the punching operation, has played absorbing effect.
As a further scheme of the invention: the box is installed to the indoor bottom of tooth rubbing room, and the mid-mounting has the drawer in the box, drawer and box sliding connection, and the bottom is provided with the strainer in the drawer, and the handle is installed to the drawer front end, and the impurity in the liquid is saved in the drawer, regularly stimulates the handle, pulls out the drawer, clears up the impurity of inside.
As a further scheme of the invention: the right side wall sub-unit connection has the drain pipe in the box, and the drain pipe mid-mounting has the valve, opens the valve, and liquid flows from the drain pipe, provides convenient.
As a further scheme of the invention: the connecting pipe is provided with the electromagnetic valve, the electromagnetic valve is arranged on the upper portion of the connecting pipe, and the electromagnetic valve controls the flow rate of liquid and is convenient to control operation.
As a further scheme of the invention: the storage battery box is installed to box left side wall, and the storage battery box front end is connected with the wire, and the bottom plate is installed to the storage battery box lower extreme, bottom plate right side wall and box fixed connection, and the storage battery box supplies power to the device, and it is convenient to bring.
Compared with the prior art, the invention has the beneficial effects that:
1. in the invention, liquid enters the tooth rubbing chamber from the water outlet to clean materials, so that the temperature reduction treatment is completed, scalding to hands is avoided, and potential safety hazards are prevented.
2. According to the invention, liquid enters the box body, impurities in the liquid are stored in the drawer, the drawer is pulled out by regularly pulling the handle, the impurities in the drawer are cleaned, the liquid passes through the screen leaking machine and enters the box body to be stored, the valve is opened, and the liquid flows out from the liquid outlet pipe, so that convenience is provided, the device is prevented from being polluted by the impurities, convenience is brought, and the efficiency of operation is improved.
Drawings
FIG. 1 is a schematic external view of the present invention;
FIG. 2 is a schematic view of a water spray chamber according to the present invention;
FIG. 3 is an enlarged view of the present invention C;
FIG. 4 is an enlarged view of B of the present invention;
FIG. 5 is an enlarged view of A of the present invention;
FIG. 6 is a schematic structural view of the thread rolling chamber according to the present invention;
fig. 7 is a schematic structural view of the case of the present invention.
In the figure: 1. an operation table; 2. a baffle plate; 3. a punch press; 4. a pressure chamber; 5. a control panel; 6. scale lines; 7. a first locking bolt; 8. a fixed cover; 9. a box cover; 10. an electromagnetic valve; 11. a connecting pipe; 12. a fixed chamber; 13. a sloping plate; 14. A thread rolling chamber; 15. a collection chamber; 16. connecting columns; 17. a leakage net; 18. a drawer; 19. a handle; 20. a box body; 21. a battery case; 22. a wire; 23. a base plate; 24. a fixing plate; 25. a lower connection chamber; 26. a buffer plate; 27. punching a head; 28. Connecting blocks; 29. a second locking bolt; 30. an upper connection chamber; 31. a water pump; 32. a water storage tank; 33. a fixed mount; 34. A water spraying chamber; 35. rubbing the teeth head; 36. rotating the motor; 37. a fixed block; 38. a water outlet; 39. a liquid outlet pipe; 40. a valve; 41. a belt; 42. a rotating shaft; 43. and a screw rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1 to 7, in the embodiment of the present invention, a cutting thread rolling machine with a punching mechanism includes an operation table 1, wherein two sides of an upper end of the operation table 1 are respectively provided with a baffle 2, a left portion of the upper end of the operation table 1 is provided with a fixing plate 24, an upper end of the fixing plate 24 is provided with a punching chamber 4, a top end in the punching chamber 4 is provided with a punching machine 3, a lower end of the punching machine 3 is provided with a punching head 27, a thread rolling chamber 14 is arranged in the middle of the upper end of the operation table 1, four corners of the lower end of the thread rolling chamber 14 are respectively provided with a fixing block 37, the lower end of the fixing block 37 is fixedly connected with the operation table 1, a right side wall in the thread rolling chamber 14 is connected with a screw rod 43, a thread rolling head 35 is arranged at the front end of the screw rod 43, the outer end of the screw rod passes through the, the external mounting of rotation motor 36 has fixed frame 33, the lower extreme of fixed frame 33 and operation panel 1 fixed connection, spliced pole 16 is installed to the lead screw 43 front end, fixed room 12 is installed at the upper end mid-mounting of thread rolling room 14, fixed room 12 upper end is connected with connecting pipe 11, the lower extreme of connecting pipe 11 is connected with outlet 38, thread rolling room 14 right side is installed and is spouted water chamber 34, spout chamber 34 front end is provided with scale mark 6, spout chamber 34 upper end is installed case lid 9, case lid 9 upper end mid-mounting has fixed lid 8, spout chamber 34 bottom end is installed the storage water tank 32, connecting pipe 11 upper end and spout chamber 34 left side intercommunication, connecting pipe 11 upper portion is installed water pump 31, thread rolling room 14 right-hand member is installed the swash plate 13, swash plate 13 lower extreme and operation panel 1 fixed connection, operation panel 1.
The four corners of the upper end of the box cover 9 are respectively provided with a first locking bolt 7, the lower end of each first locking bolt 7 is rotatably connected with the box cover 9, and the box cover 9 can be conveniently fixed by the first locking bolts 7, so that convenience is brought; the upper end of the pressure chamber 4 is provided with a control panel 5, the control panel 5 is electrically connected with the punching machine 3, the water pump 31 and the rotating motor 36, and the control panel 5 controls the electric appliance of the device, so that the operation is convenient; the four corners of the lower end of the operating platform 1 are respectively provided with an upper connecting chamber 30, the lower end of each upper connecting chamber 30 is provided with a lower connecting chamber 25, the upper connecting chambers 30 are respectively connected with the inner sides of the lower connecting chambers 25 in a sliding manner, the upper parts of the front ends of the lower connecting chambers 25 are respectively provided with a second locking bolt 29, the second locking bolts 29 are respectively connected with the lower connecting chambers 25 in a rotating manner, the lower ends of the lower connecting chambers 25 are respectively provided with a connecting block 28, the height between the upper connecting chambers 30 and the lower connecting chambers 25 is adjusted, and the second locking bolts 29 are locked after the height is determined, so that the adjustment of different heights of the device is realized, and convenience is; the upper end of the fixed plate 24 is provided with a buffer plate 26, the lower end of the buffer plate 26 is fixedly connected with the fixed plate 24, and the buffer plate 26 is used for damping the stamping operation, so that the damping effect is achieved; a box body 20 is arranged at the inner bottom end of the thread rolling chamber 14, a drawer 18 is arranged in the middle of the box body 20, the drawer 18 is in sliding connection with the box body 20, a leakage net 17 is arranged at the inner bottom end of the drawer 18, a handle 19 is arranged at the front end of the drawer 18, impurities in liquid are stored in the drawer 18, the handle 19 is pulled periodically to pull out the drawer 18, and the impurities in the liquid are cleaned; a liquid outlet pipe 39 is connected to the lower portion of the right side wall in the box body 20, a valve 40 is mounted in the middle of the liquid outlet pipe 39, the valve 40 is opened, and liquid flows out of the liquid outlet pipe 39 conveniently; the electromagnetic valve 10 is arranged on the connecting pipe 11, the electromagnetic valve 10 is arranged at the upper part of the connecting pipe 11, and the electromagnetic valve 10 controls the flow rate of liquid, so that the control operation is convenient; battery box 21 is installed to box 20 left side wall, and battery box 21 front end is connected with wire 22, and bottom plate 23 is installed to battery box 21 lower extreme, and bottom plate 23 right side wall and box 20 fixed connection, battery box 21 supply power to the device, and it is convenient to bring.
The working principle of the invention is as follows: when the invention is in use, the device is carried to a lead wire 22 to be operated to be connected with a power supply, the height between an upper connecting chamber 30 and a lower connecting chamber 25 is adjusted according to the height of the required operation, when the height is determined, a second locking bolt 29 is locked, so that the adjustment of different heights of the device is realized, a material to be punched is placed on a buffer plate 26, the operation is carried out on a control panel 5, a punch 3 is started to drive a punch head 27 to move downwards to punch the material, after the punching is finished, the material is placed in a thread rolling chamber 14, a first locking bolt 7 is unscrewed, a certain amount of liquid is injected into a water storage tank 32, a water pump 31 is started, the liquid enters the thread rolling chamber 14 through a connecting pipe 11, a rotating motor 36 rotates to drive a rotating shaft 42 to rotate, a belt 41 rotates, the belt 41 drives a screw rod 43 to rotate, the tooth rubbing head 35 is driven to rotate, operation is carried out on materials, liquid enters the tooth rubbing chamber 14 from the water outlet 38, the materials are cleaned, cooling processing is completed, after cleaning is completed, the liquid enters the box body 20, impurities in the liquid are stored in the drawer 18, the handle 19 is pulled out periodically, the drawer 18 is pulled out, the internal impurities are cleaned, the liquid penetrates through the screen 17 machine to the box body 20 and is stored, the valve 40 is opened, the liquid flows out from the liquid outlet pipe 39, convenience is provided, the electromagnetic valve 10 controls the flow rate of the liquid, control operation is facilitated, after the tooth rubbing operation is completed, the materials enter the collecting chamber 15 through the inclined plate 13 and are collected.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent substitutions or changes according to the technical solution and the inventive concept of the present invention should be covered by the scope of the present invention.

Claims (9)

1. The utility model provides a take cutting off thread rolling machine of punching press mechanism, includes operation panel (1), its characterized in that: baffle (2) are all installed to operation panel (1) upper end both sides, fixed plate (24) are installed to operation panel (1) upper end left part, surge chamber (4) is installed to fixed plate (24) upper end, punching machine (3) are installed to the top in surge chamber (4), punching press head (27) are installed to punching machine (3) lower extreme, operation panel (1) upper end mid-mounting has the room of rubbing with the hands (14), fixed block (37) are all installed to room (14) lower extreme four corners department of rubbing with the hands, fixed block (37) lower extreme all with operation panel (1) fixed connection, right side wall is connected with lead screw (43) in the room of rubbing with the hands (14), the tooth head (35) are installed to lead screw (43) front end, lead screw (43) outer end is passed and is rubbed with the teeth room (14) and is connected with belt (41), right side portion installs axis of rotation (42) in, the utility model discloses a thread rolling machine, including axis of rotation (42), axis of rotation (42) front end is installed and is rotated motor (36), it rotates motor (36) and axis of rotation (42) to rotate to be connected, it has mount (33) to rotate motor (36) externally mounted, mount (33) lower extreme and operation panel (1) fixed connection, spliced pole (16) are installed to lead screw (43) front end, it has fixed chamber (12) to rub tooth room (14) upper end mid-mounting, fixed chamber (12) upper end is connected with connecting pipe (11), connecting pipe (11) lower extreme is connected with delivery port (38), it installs spray chamber (34) to rub tooth room (14) right side, spray chamber (34) front end is provided with scale mark (6), case lid (9) is installed to spray chamber (34) upper end, case lid (9) upper end mid-mounting has fixed cover (8), storage water tank (32) are installed to, the upper end of the connecting pipe (11) is communicated with the left side of the water spraying chamber (34), the water pump (31) is installed on the upper portion of the connecting pipe (11), the inclined plate (13) is installed at the right end of the thread rolling chamber (14), the lower end of the inclined plate (13) is fixedly connected with the operating platform (1), and the collecting chamber (15) is installed on the right side of the operating platform (1).
2. The cutting thread rolling machine with the punching mechanism according to claim 1, wherein: first locking bolt (7) are all installed to case lid (9) upper end four corners department, first locking bolt (7) lower extreme all rotates with case lid (9) to be connected.
3. The cutting thread rolling machine with the punching mechanism according to claim 1, wherein: control panel (5) are installed to surge-chamber (4) upper end, control panel (5) all with punching machine (3), water pump (31) and rotating electrical machines (36) electric connection.
4. The cutting thread rolling machine with the punching mechanism according to claim 1, wherein: operation panel (1) lower extreme four corners department all installs connection chamber (30), go up connection chamber (30) lower extreme and all install down connection chamber (25), go up connection chamber (30) all with connect chamber (25) inboard sliding connection down, second locking bolt (29) are all installed on connection chamber (25) front end upper portion down, second locking bolt (29) all rotate with lower connection chamber (25) and are connected, connecting block (28) are all installed to connection chamber (25) lower extreme down.
5. The cutting thread rolling machine with the punching mechanism according to claim 1, wherein: buffer board (26) are installed to fixed plate (24) upper end, buffer board (26) lower extreme and fixed plate (24) fixed connection.
6. The cutting thread rolling machine with the punching mechanism according to claim 1, wherein: the box body (20) is installed at the inner bottom end of the thread rolling chamber (14), the drawer (18) is installed in the middle of the interior of the box body (20), the drawer (18) is in sliding connection with the box body (20), the inner bottom end of the drawer (18) is provided with the screen (17), and the handle (19) is installed at the front end of the drawer (18).
7. The cutting thread rolling machine with the punching mechanism according to claim 6, wherein: the right side wall sub-unit connection has drain pipe (39) in box (20), drain pipe (39) mid-mounting has valve (40).
8. The cutting thread rolling machine with the punching mechanism according to claim 1, wherein: the electromagnetic valve (10) is installed on the connecting pipe (11), and the electromagnetic valve (10) is arranged on the upper portion of the connecting pipe (11).
9. The cutting thread rolling machine with the punching mechanism according to claim 6, wherein: battery box (21) are installed to box (20) left side wall, battery box (21) front end is connected with wire (22), bottom plate (23) are installed to battery box (21) lower extreme, bottom plate (23) right side wall and box (20) fixed connection.
CN202011492385.XA 2020-12-17 2020-12-17 Take cutting off thread rolling machine of punching press mechanism Pending CN112620559A (en)

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Application Number Priority Date Filing Date Title
CN202011492385.XA CN112620559A (en) 2020-12-17 2020-12-17 Take cutting off thread rolling machine of punching press mechanism

Publications (1)

Publication Number Publication Date
CN112620559A true CN112620559A (en) 2021-04-09

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CN202011492385.XA Pending CN112620559A (en) 2020-12-17 2020-12-17 Take cutting off thread rolling machine of punching press mechanism

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN114833282A (en) * 2022-03-30 2022-08-02 浙江科腾精工机械股份有限公司 From check thread screw thread rolling mechanism of taking slagging-off function
CN116652074A (en) * 2023-06-06 2023-08-29 芜湖天科航空科技有限公司 Screw thread threading device and threading process thereof

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CN210450764U (en) * 2019-08-06 2020-05-05 章云进 Take cutting off thread rolling machine of punching press mechanism
CN211027920U (en) * 2019-11-21 2020-07-17 烟台通汇标准件有限公司 Thread rolling machine convenient to retrieve coolant liquid
CN211052412U (en) * 2019-11-11 2020-07-21 上海宏挺紧固件制造有限公司 Thread rolling machine for oil smoke extraction
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CN211052412U (en) * 2019-11-11 2020-07-21 上海宏挺紧固件制造有限公司 Thread rolling machine for oil smoke extraction
CN211027920U (en) * 2019-11-21 2020-07-17 烟台通汇标准件有限公司 Thread rolling machine convenient to retrieve coolant liquid
CN211839993U (en) * 2019-12-31 2020-11-03 檀克良 Thread rolling machine

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114833282A (en) * 2022-03-30 2022-08-02 浙江科腾精工机械股份有限公司 From check thread screw thread rolling mechanism of taking slagging-off function
CN116652074A (en) * 2023-06-06 2023-08-29 芜湖天科航空科技有限公司 Screw thread threading device and threading process thereof
CN116652074B (en) * 2023-06-06 2023-10-10 芜湖天科航空科技有限公司 Screw thread threading device and threading process thereof

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Application publication date: 20210409