CN111203599A - Small tapping equipment - Google Patents
Small tapping equipment Download PDFInfo
- Publication number
- CN111203599A CN111203599A CN202010038685.4A CN202010038685A CN111203599A CN 111203599 A CN111203599 A CN 111203599A CN 202010038685 A CN202010038685 A CN 202010038685A CN 111203599 A CN111203599 A CN 111203599A
- Authority
- CN
- China
- Prior art keywords
- workbench
- fixing seat
- seat
- fixing
- dwang
- 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.)
- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/16—Thread cutting; Automatic machines specially designed therefor in holes of workpieces by taps
- B23G1/18—Machines with one working spindle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/44—Equipment or accessories specially designed for machines or devices for thread cutting
- B23G1/46—Equipment or accessories specially designed for machines or devices for thread cutting for holding the threading tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/44—Equipment or accessories specially designed for machines or devices for thread cutting
- B23G1/48—Equipment or accessories specially designed for machines or devices for thread cutting for guiding the threading tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/01—Frames, beds, pillars or like members; Arrangement of ways
- B23Q1/015—Frames, beds, pillars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/066—Bench vices
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G2210/00—Details of threads produced
- B23G2210/04—Internal threads
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Workshop Equipment, Work Benches, Supports, Or Storage Means (AREA)
Abstract
The invention discloses small tapping equipment which comprises a workbench, wherein the workbench is of a rectangular structure, supporting legs are uniformly distributed on the lower end face of the workbench, the number of the supporting legs is four, the supporting legs are distributed at four corners of the workbench in a rectangular shape, and a first fixing seat and a second fixing seat are distributed at intervals on the centerline of the upper end face of the workbench. The small tapping equipment is provided with the first fixing seat and the second fixing seat, so that the workpieces in different shapes can be subjected to thread machining, the mounting seat can move in three directions, tool setting is facilitated, and the position accuracy of machining is ensured; moreover, the workpiece is easy to clamp in the fixed seat, so that an operator can be familiar with the operation of thread machining, the quality of thread machining can be ensured, and the damage to the workpiece caused by insufficient proficiency of the operator is avoided; in addition, through being equipped with the protection pad at the contact surface cloth of supporting leg and ground, can effectively avoid when the operation, the supporting leg takes place to slide with ground, influences the processingquality of screw thread.
Description
Technical Field
The invention relates to machining equipment, in particular to small tapping equipment.
Background
Colleges and universities usually set up golden practice to improve the practical operation ability of students and realize the effective combination of book knowledge and practice; the metalworker practice relates to basic knowledge of casting, forging, welding and cutting machining, and contents of lathing, milling, planing, grinding, fitter, numerical control machining, special machining and the like. Wherein, the bench worker has the most involved process operations, and tapping is one of the indispensable practical training contents; the tapping equipment used in the existing colleges and universities is simple in structure, and in actual operation, the students are often damaged or even injured due to insufficient proficiency of the students; this is not only not conducive to students being familiar with the tapping operation flow, but also increases the curriculum cost in colleges and universities. Accordingly, there is a need for improvements in the art.
Disclosure of Invention
The present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a small-sized tapping apparatus.
In order to achieve the purpose, the invention provides the following technical scheme:
a small tapping device comprises a workbench, wherein the workbench is of a rectangular structure, supporting legs are uniformly distributed on the lower end face of the workbench, the number of the supporting legs is four, the supporting legs are distributed at four corners of the workbench in a rectangular shape, and a first fixing seat and a second fixing seat are distributed at intervals in the middle line position of the upper end face of the workbench; as a further scheme of the invention: the first fixing seat is cylindrical, fastening bolts are uniformly distributed on the periphery of the first fixing seat, the fastening bolts are connected with the first fixing seat through matching threads, and one end of each fastening bolt extends to the inner side of the first fixing seat; the second fixing seat is of a cuboid square groove structure, fixing bolts are uniformly distributed on one side of the second fixing seat, the fixing bolts are connected with the second fixing seat through matching threads, and one end of each fixing bolt extends into the square groove of the second fixing seat; clamping grooves are uniformly distributed on two sides of the second fixing seat adjacent to the fixing bolt, springs are assembled on the inner sides of the clamping grooves, clamping blocks are fixedly connected to one ends of the springs, which are far away from the clamping grooves, and the clamping blocks extend to the outer sides of the clamping grooves; one side of the upper end face of the workbench is movably connected with a sliding seat, one end of the sliding seat extends to the inner side of the workbench, the inner side of the workbench is provided with a lead screw through a fixed bearing, one end of the lead screw extends to the outer side of the workbench and is fixedly connected with a hand wheel, and a handle is fixedly connected onto the hand wheel; one end of the sliding seat is in transmission fit with the screw rod, and the sliding seat can be driven to slide along the upper end face of the workbench by rotating the screw rod; the upper end of the sliding seat is provided with a tapping mechanism.
As a further scheme of the invention: the tapping mechanism comprises a supporting rod, the supporting rod is vertically arranged, one end of the supporting rod is embedded into the inner side of the sliding seat, and a lifting cylinder is connected between the supporting rod and the sliding seat; one side of the supporting rod is fixedly connected with a cross rod, the cross rod is horizontally arranged, one end of the cross rod, which is far away from the supporting rod, is connected with an installation seat, one end of the installation seat is embedded into the inner side of the cross rod, and a telescopic cylinder is connected between the cross rod and the installation seat; be equipped with vertical dwang on the mount pad, the dwang is the step shaft type, has laid the screw thread on the dwang, and fixed connection has horizontally action pin on the dwang, and open the lower extreme of dwang has the assembly groove, and there is locking bolt one side of dwang through cooperation threaded connection, and locking bolt's one end extends to in the assembly groove.
As a further scheme of the invention: the upper end of the workbench is provided with a first accommodating groove and a second accommodating groove at intervals, the first accommodating groove is circular, and the second accommodating groove is square.
As a further scheme of the invention: the fixture block is made of rubber.
As a further scheme of the invention: the size and specification of the fastening bolt are the same as those of the fixing bolt.
As a further scheme of the invention: and the contact surface of the supporting leg and the ground is provided with an anti-slip pad.
As a further scheme of the invention: a rib plate is fixedly connected between two adjacent supporting legs.
Compared with the prior art, the invention has the beneficial effects that: the small tapping equipment is provided with the first fixing seat and the second fixing seat, so that the workpieces in different shapes can be subjected to thread machining, the mounting seat can move in three directions, tool setting is facilitated, and the position accuracy of machining is ensured; moreover, the workpiece is easy to clamp in the fixed seat, so that an operator can be familiar with the operation of thread machining, the quality of thread machining can be ensured, and the damage to the workpiece caused by insufficient proficiency of the operator is avoided; in addition, through being equipped with the protection pad at the contact surface cloth of supporting leg and ground, can effectively avoid when the operation, the supporting leg takes place to slide with ground, influences the processingquality of screw thread.
Drawings
Fig. 1 is a schematic view of a small tapping apparatus.
Figure 2 is a top view of the small tapping apparatus.
Fig. 3 is an enlarged view of a portion a in fig. 2.
Fig. 4 is a three-dimensional structure diagram of a rotating rod in the small tapping device.
In the figure: 1-workbench, 2-supporting legs, 3-rib plates, 4-sliding seats, 5-supporting rods, 6-cross rods, 7-mounting seats, 8-accommodating grooves I, 9-accommodating grooves II, 10-rotating rods, 11-operating pins, 12-fixing seats I, 13-fastening bolts, 14-fixing seats II, 15-fixing bolts, 16-clamping blocks, 17-screw rods, 18-hand wheels, 19-handles, 20-fixed bearings, 21-clamping grooves, 22-springs, 23-assembly grooves and 24-locking bolts.
Detailed Description
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Example 1
Referring to fig. 1-4, a small tapping device comprises a workbench 1, wherein the workbench 1 is of a rectangular structure, supporting legs 2 are uniformly distributed on the lower end face of the workbench 1, the number of the supporting legs 2 is four, the supporting legs are arranged at four corners of the workbench, and a first fixing seat 12 and a second fixing seat 14 are distributed at intervals on the middle line of the upper end face of the workbench 1; the first fixing seat 12 is cylindrical, the periphery of the first fixing seat 12 is uniformly provided with fastening bolts 13, the fastening bolts 13 are connected with the first fixing seat 12 through matching threads, and one end of each fastening bolt extends to the inner side of the first fixing seat 12; the second fixing seat 14 is of a cuboid square groove structure, fixing bolts 15 are uniformly distributed on one side of the second fixing seat 14, the fixing bolts 15 are connected with the second fixing seat 14 through matching threads, and one end of each fixing bolt extends into the square groove of the second fixing seat 14; clamping grooves 21 are uniformly distributed on two adjacent sides of the second fixing seat 14 and the fixing bolt 15, a spring 22 is assembled on the inner side of each clamping groove 21, one end, away from the clamping groove 21, of the spring 22 is fixedly connected with a clamping block 16, and the clamping block 16 extends to the outer side of the clamping groove 21; one side of the upper end surface of the workbench 1 is movably connected with a sliding seat 4, one end of the sliding seat 4 extends to the inner side of the workbench 1, the inner side of the workbench 1 is provided with a screw rod 17 through a fixed bearing 20, one end of the screw rod 17 extends to the outer side of the workbench 1 and is fixedly connected with a hand wheel 18, and the hand wheel 18 is fixedly connected with a handle 19; one end of the sliding seat 4 is in transmission fit with the screw rod 17, and the sliding seat 4 can be driven to slide along the upper end face of the workbench 1 by rotating the screw rod 17; the upper end of the slide 4 is fitted with a tapping mechanism for machining a thread.
The specific structure of the tapping mechanism is not limited, preferably, in this embodiment, the tapping mechanism includes a support rod 5, the support rod 5 is vertically arranged, one end of the support rod 5 is embedded into the inner side of the sliding seat 4, and a lifting cylinder is connected between the support rod 5 and the sliding seat 4 to change the height of the support rod 5; one side of the supporting rod 5 is fixedly connected with a cross rod 6, the cross rod 6 is horizontally arranged, one end of the cross rod 6, which is far away from the supporting rod 5, is connected with an installation seat 7, one end of the installation seat 7 is embedded into the inner side of the cross rod 6, and a telescopic cylinder is connected between the cross rod 6 and the installation seat 7 and used for changing the horizontal position of the installation seat 7; be equipped with vertical dwang 10 on the mount pad 7, dwang 10 is the step shaft type, has laid the screw thread on the dwang 10, and fixed connection has horizontally action pin 11 on the dwang 10, and open the lower extreme of dwang 10 has assembly groove 23, and there is locking bolt 24 one side of dwang 10 through cooperation threaded connection, and locking bolt 24's one end extends to in the assembly groove 23. The mounting groove 23 is used for mounting a tapped tap bit, and the locking bolt 24 is used for locking the tap bit.
Furthermore, the upper end of the workbench 1 is provided with a first accommodating groove 8 and a second accommodating groove 9 at intervals, the first accommodating groove 8 is circular, and the second accommodating groove 9 is square for storing necessary tools for tapping.
The specific material of the latch 16 is not limited, and preferably, in this embodiment, the latch 16 is made of rubber.
Further, the fastening bolt 13 and the fixing bolt 15 have the same size.
Furthermore, the contact surface of supporting leg 2 and ground is laid the slipmat to avoid when carrying out tapping operation, the position of workstation 1 changes, influences the screw thread processingquality.
The working principle of the embodiment is as follows:
when the thread of a round workpiece is machined, the workpiece is embedded into the fixed seat 12, the position of the workpiece is fixed through the fastening bolt 13, and the handle 19 is shaken to enable the sliding seat 4 to drive the rotating rod 10 to move right above the workpiece; adjusting the support rod 5 and the mounting seat 7 to perform tool setting, driving the rotating rod 10 to rotate through the operating pin 11 after the tool setting is completed, so that the screw tap cutter descends while rotating to perform thread machining, and recovering the screw tap cutter to the initial position after the thread machining is completed and taking out a workpiece; when the thread of the square workpiece is machined, the workpiece is embedded into the second fixed seat 14, the workpiece is fixed through the fixing bolt 15 and the fixture block 16, the tool setting is carried out according to the steps, the thread is machined after the tool setting is finished, and the workpiece is taken out after the initial position of the conical cutter is restored.
Example 2
In order to enhance the structural strength and stability of the workbench 1, the present embodiment is improved on the basis of the embodiment 1, and the improvement is as follows: and a rib plate 3 is fixedly connected between two adjacent supporting legs 2 to enhance the integral structural strength and stability of the tapping equipment.
It should be noted that, although the present specification describes embodiments, each embodiment does not include only a single technical solution, and such description of the specification is only for clarity, and those skilled in the art should take the specification as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments understood by those skilled in the art, and the above-mentioned embodiments only express the preferred embodiments of the technical solutions, and the description thereof is more specific and detailed, but should not be construed as limiting the scope of the claims of the technical solutions. It should be noted that, for those skilled in the art, various modifications, improvements and substitutions can be made without departing from the spirit of the invention, and all of them belong to the protection scope of the technical solution. The protection scope of this technical solution patent should be subject to the appended claims.
Claims (7)
1. A small tapping device comprises a workbench (1), and is characterized in that the workbench (1) is of a rectangular structure, supporting legs (2) are uniformly distributed on the lower end face of the workbench, the number of the supporting legs (2) is four, the supporting legs are arranged at four corners of the workbench in a rectangular shape, and a first fixing seat (12) and a second fixing seat (14) are distributed at intervals on the central line position of the upper end face of the workbench (1); the fixing seat I (12) is cylindrical, fastening bolts (13) are uniformly distributed on the periphery of the fixing seat I (12), the fastening bolts (13) are connected with the fixing seat I (12) through matching threads, and one end of each fastening bolt extends to the inner side of the fixing seat I (12); the second fixing seat (14) is of a cuboid square groove structure, fixing bolts (15) are uniformly distributed on one side of the second fixing seat (14), the fixing bolts (15) are connected with the second fixing seat (14) through matching threads, and one end of each fixing bolt extends into the square groove of the second fixing seat (14); clamping grooves (21) are uniformly distributed on two adjacent sides of the second fixing seat (14) and the fixing bolt (15), a spring (22) is assembled on the inner side of each clamping groove (21), a clamping block (16) is fixedly connected to one end, deviating from the clamping groove (21), of the spring (22), and the clamping block (16) extends to the outer side of each clamping groove (21); one side of the upper end face of the workbench (1) is movably connected with a sliding seat (4), one end of the sliding seat (4) extends to the inner side of the workbench (1), the inner side of the workbench (1) is provided with a lead screw (17) through a fixed bearing (20), one end of the lead screw (17) extends to the outer side of the workbench (1) and is fixedly connected with a hand wheel (18), and a handle (19) is fixedly connected onto the hand wheel (18); one end of the sliding seat (4) is in transmission fit with the screw rod (17), and the upper end of the sliding seat (4) is provided with a tapping mechanism.
2. The small tapping device according to claim 1, wherein the tapping mechanism comprises a support rod (5), the support rod (5) is vertically arranged, one end of the support rod is embedded in the inner side of the sliding seat (4), and a lifting cylinder is connected between the support rod (5) and the sliding seat (4); one side of the supporting rod (5) is fixedly connected with a cross rod (6), the cross rod (6) is horizontally arranged, one end, away from the supporting rod (5), of the cross rod (6) is connected with an installation seat (7), one end of the installation seat (7) is embedded into the inner side of the cross rod (6), and a telescopic cylinder is connected between the cross rod (6) and the installation seat (7); be equipped with vertical dwang (10) on mount pad (7), dwang (10) are the step shaft type, have laid the screw thread on dwang (10), and fixed connection has horizontally action pin (11) on dwang (10), and the lower extreme of dwang (10) is opened has assembly groove (23), and there is locking bolt (24) one side of dwang (10) through cooperation threaded connection, and the one end of locking bolt (24) extends to in assembly groove (23).
3. The small tapping device according to claim 1, wherein the upper end of the working table (1) is provided with a first receiving groove (8) and a second receiving groove (9) at intervals, the first receiving groove (8) is circular, and the second receiving groove (9) is square.
4. The small tapping apparatus according to claim 1, wherein said cartridge (16) is made of rubber.
5. The small tapping apparatus according to claim 2, wherein the set screw (13) is of the same dimensional size as the fixing screw (15).
6. The small tapping device according to claim 2, wherein the contact surface of the support leg (2) with the ground is provided with a non-slip mat.
7. The small tapping device according to claim 6, wherein a rib plate (3) is fixedly connected between two adjacent supporting legs (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010038685.4A CN111203599A (en) | 2020-01-14 | 2020-01-14 | Small tapping equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010038685.4A CN111203599A (en) | 2020-01-14 | 2020-01-14 | Small tapping equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111203599A true CN111203599A (en) | 2020-05-29 |
Family
ID=70785252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010038685.4A Withdrawn CN111203599A (en) | 2020-01-14 | 2020-01-14 | Small tapping equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111203599A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205043278U (en) * | 2015-10-13 | 2016-02-24 | 江苏省徐州机电工程高等职业学校 | Hand tapping locating guiding device |
| CN205309834U (en) * | 2015-12-05 | 2016-06-15 | 重庆腾通工业设计有限公司 | Clamping jig of board -like ring flange |
| CN207873323U (en) * | 2017-12-31 | 2018-09-18 | 成都新航工业科技有限公司 | Casting chasing bar |
| CN108746889A (en) * | 2018-07-13 | 2018-11-06 | 浙江冯家桥机械有限公司 | A kind of steel alloy processing tapping machine |
| CN208262312U (en) * | 2018-04-19 | 2018-12-21 | 衢州职业技术学院 | A kind of tooth set being conveniently replaceable cutter head repairs slot device |
| CN109834345A (en) * | 2018-12-27 | 2019-06-04 | 扬州汇翔精密冲件有限公司 | Tap holder machine in a kind of porous pattern of electrical accessorie processing |
| CN209664491U (en) * | 2018-12-28 | 2019-11-22 | 青岛广润霖工贸有限公司 | A kind of electric threading machine equipped with fixture |
-
2020
- 2020-01-14 CN CN202010038685.4A patent/CN111203599A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205043278U (en) * | 2015-10-13 | 2016-02-24 | 江苏省徐州机电工程高等职业学校 | Hand tapping locating guiding device |
| CN205309834U (en) * | 2015-12-05 | 2016-06-15 | 重庆腾通工业设计有限公司 | Clamping jig of board -like ring flange |
| CN207873323U (en) * | 2017-12-31 | 2018-09-18 | 成都新航工业科技有限公司 | Casting chasing bar |
| CN208262312U (en) * | 2018-04-19 | 2018-12-21 | 衢州职业技术学院 | A kind of tooth set being conveniently replaceable cutter head repairs slot device |
| CN108746889A (en) * | 2018-07-13 | 2018-11-06 | 浙江冯家桥机械有限公司 | A kind of steel alloy processing tapping machine |
| CN109834345A (en) * | 2018-12-27 | 2019-06-04 | 扬州汇翔精密冲件有限公司 | Tap holder machine in a kind of porous pattern of electrical accessorie processing |
| CN209664491U (en) * | 2018-12-28 | 2019-11-22 | 青岛广润霖工贸有限公司 | A kind of electric threading machine equipped with fixture |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200529 |