CN114101813A - Device for secondary threading of threaded hole - Google Patents
Device for secondary threading of threaded hole Download PDFInfo
- Publication number
- CN114101813A CN114101813A CN202111488865.3A CN202111488865A CN114101813A CN 114101813 A CN114101813 A CN 114101813A CN 202111488865 A CN202111488865 A CN 202111488865A CN 114101813 A CN114101813 A CN 114101813A
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- Prior art keywords
- tap
- screw tap
- threading
- input shaft
- movable
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- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 4
- 238000003754 machining Methods 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000010079 rubber tapping Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 208000034656 Contusions Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 208000034526 bruise Diseases 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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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
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a device for secondary threading of a threaded hole, which comprises a screw tap and a torque input shaft for driving the screw tap to rotate, wherein a movable connecting assembly is arranged between the torque input shaft and the screw tap, a limiting sleeve is arranged on the periphery of the movable connecting assembly, and a gap is formed between the limiting sleeve and the movable connecting assembly. The device for secondary threading of the threaded hole is beneficial to compensating positioning and orientation errors between the screw tap and the threaded hole, avoids excessive cutting of the threaded hole and fracture of the screw tap, and provides an effective solution for automation of secondary threading of large-batch threaded holes.
Description
Technical Field
The invention relates to machining equipment, in particular to a device for secondary threading of a threaded hole.
Background
The screw hole extensively exists on all kinds of spare parts, plays the effect of connecting the fastening. If the threaded hole is polluted or collided in the manufacturing process of a product, the screwing effect of the thread can be influenced, and the thread stop gauge is not stopped, so that the threaded hole is unqualified. The method for solving the problem is to use the same type of screw tap to carry out secondary screw passing so as to remove pollutants or correct bruise.
The two-time threading based on the existing thread hole and the first-time tapping based on the bottom hole have very obvious difference:
the first tapping is a process from scratch for the thread ridge, the characteristics of the whole screw hole are all determined by the screw tap, and by removing the material interfering with the screw tap to form a new thread ridge, the problems of screw hole thread form and screw tap interference do not exist, because the two are mutually coupled. However, for the secondary threading, because the thread hole tooth form already exists and the thread tapping tooth form also already exists, the purpose of threading is not to remove the tooth form material of the thread hole, but to remove impurities in the tooth form gap and correct the bump injury. Therefore, in the secondary threading process, the screw tap is required to be perfectly coupled with the threaded hole in six freedom directions, and any interference phenomenon cannot exist. Otherwise, the existing tooth form of the threaded hole is subjected to secondary cutting processing, and the threaded hole is actually damaged.
The manual threading, the screw tap possess complete degree of freedom, do not have screw hole tooth form and screw tap interference problem. For single or small threaded holes, manual threading is a simple and effective method. However, in the case of large-batch products, the manual threading efficiency is low, the labor cost is high, and the solution is that secondary threading of the threaded hole can only be completed in a multi-station one-step mode through an automatic tapping machine. At present, for automatic equipment tapping, most taps with secondary threading adopt rigid clamping and are connected with a torsion shaft. The method has too small flexibility, and if the part where the screw hole is positioned cannot be well positioned and clamped, the screw tap and the screw hole are easy to interfere, so that the screw tap is broken or the screw hole is over-cut. In fact, the position and the angle of the screw tap and the screw hole are inevitably deviated due to product clamping errors, manufacturing errors and equipment operation errors. The engine suspension product belongs to typical special-shaped parts, and most products cannot be accurately positioned when large-batch automatic secondary wire passing is performed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a device for secondary threading of a threaded hole, which is beneficial to compensating positioning and orientation errors between a screw tap and the threaded hole and avoiding excessive cutting of the threaded hole and fracture of the screw tap.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a device for screw hole secondary is crossed silk, includes the tap and is used for driving the rotatory moment of torsion input shaft of tap, the moment of torsion input shaft with be equipped with movable connection assembly between the tap, the movable connection assembly periphery is equipped with limit sleeve, limit sleeve with the clearance has between the movable connection assembly.
As a further improvement of the above technical solution: the movable connection assembly comprises two sections of cross universal joints, and the torque input shaft and the two sections of the cross universal joints are sequentially connected with the screw tap.
As a further improvement of the above technical solution: the movable connection assembly includes a resilient coupling.
As a further improvement of the above technical solution: an axial telescopic movable joint is arranged between the screw tap and the movable connecting assembly.
As a further improvement of the above technical solution: an axial telescopic movable joint is arranged between the torque input shaft and the movable connecting assembly.
As a further improvement of the above technical solution: and axial telescopic movable joints are arranged between the screw tap and the movable connecting assembly and between the torque input shaft and the movable connecting assembly.
The device for secondary threading of the threaded hole further comprises a guide plate, wherein the guide plate is provided with a guide hole for guiding the screw tap into the threaded hole to be machined.
As a further improvement of the above technical solution: the guiding hole comprises a conical section and a cylindrical section, and the cylindrical section is connected with the smaller end of the conical section.
As a further improvement of the above technical solution: the clearance between spacing sleeve with movable coupling assembling is a, the maximum deviation between tap and the screw hole is b, then a > b.
As a further improvement of the above technical solution: the radius of the larger end of the conical section is c, and c is larger than a.
Compared with the prior art, the invention has the advantages that: according to the device for secondary threading of the threaded hole, the torque input shaft is connected with the screw tap through the movable connecting assembly, so that the flexible clamping of the screw tap is realized, the comprehensive degree of freedom can be provided for the screw tap, the position deviation and the angle deviation between the screw tap and the threaded hole can be compensated, the excessive cutting of the screw hole and the fracture of the screw tap are avoided, the limiting sleeve is sleeved on the periphery of the movable connecting assembly, and a gap is formed between the limiting sleeve and the movable connecting assembly, so that the movement of the movable connecting assembly and the screw tap is limited in a proper range, and the positioning capability and the positioning accuracy of the screw tap are improved.
Drawings
Fig. 1 is a schematic perspective view of the device for secondary threading of the threaded hole of the invention.
Fig. 2 is a schematic perspective view of the movable connecting assembly of the present invention.
FIG. 3 is a schematic cross-sectional structural view of the device for secondary threading of the threaded hole.
The reference numerals in the figures denote: 1. tapping; 2. a torque input shaft; 3. a movable connection assembly; 31. a cross universal joint; 4. a limiting sleeve; 5. an axially telescopic movable joint; 6. a guide plate; 61. a guide hole; 611. a tapered section; 612. a cylindrical section.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples of the specification.
Fig. 1 to 3 show an embodiment of the device for secondary threading of a threaded hole according to the present invention, which includes a tap 1, a torque input shaft 2, and a double-joint universal joint 31 for connecting the tap 1 and the torque input shaft 2, wherein the double-joint universal joint 31 is used as a movable connection assembly 3 or a flexible connection assembly, which can provide full freedom of the tap 1 in six directions, and can compensate for positional deviation or angular deviation between the tap 1 and the threaded hole by the universal joint 31, and the universal joint 31 can reliably transmit torque of the torque input shaft 2 to provide power for tapping the tap 1. Of course, in other embodiments, the movable connecting component 3 may also adopt an elastic coupling (such as a rubber elastic coupling, etc.), which can also provide the overall freedom of the screw tap 1 in six directions and transmit the torque of the torque input shaft 2.
Further, in the present embodiment, the lower end of the universal joint cross 31 at the lower side is provided with the axial telescopic joint 5, when the deviation between the rotation speed and the feeding speed of the tap 1 and the thread profile is encountered, the axial telescopic joint 5 can be extended and retracted along the axial direction of the tap 1, so as to perform compensation adjustment, and the adjustment process is direct and fast. Of course, in other embodiments, the axial telescopic joint 5 may be provided at the upper end of the upper universal joint 31, or the axial telescopic joint 5 may be provided at both the lower end of the lower universal joint 31 and the upper end of the upper universal joint 31, and the compensation adjustment may be performed when the rotational speed and feed speed of the tap 1 deviate from the thread profile.
The movable connecting component 3 adopts a double-joint cross universal joint 31, has enough freedom degree, can effectively compensate deviation and interference between a screw hole and the screw tap 1 in all directions, but has the defects of too large freedom degree and insufficient positioning capability. If only the upper end of the cross universal joint 31 is fixed and the lower end is in a free state without limitation, the free end of the cross universal joint 31 can swing randomly in a large range in the rotation process of the torque input shaft 2. For this purpose, the present invention further comprises a limit sleeve 4 fitted around the outer periphery of the universal joint cross 31, and the swinging of the universal joint cross 31 is limited to a suitable range. The limiting mode is that the inner diameter of the limiting sleeve 4 is larger than the outer diameter of the cross universal joint 31, and a gap a between the inner diameter and the outer diameter is the size of the degree of freedom of the cross universal joint 31 which can swing.
After the limiting sleeve 4 is arranged, the screw tap 1 still swings to a certain extent, the guide plate 6 of one guide hole 61 is further used for further positioning the screw tap 1 swinging in a limited range, auxiliary guide is carried out, and the screw tap 1 is guided into a screw hole to be machined.
The degree of freedom in which the cross universal joint 31 can swing follows the following principle:
the lower limit of the degree of freedom depends on the maximum deviation b of the positioning, orientation between the tap 1 and the hole, the degree of freedom being greater than the maximum deviation b, so that the positioning, orientation deviation between the tap 1 and the hole can be fully compensated.
The upper limit of the degree of freedom depends on the size of the larger end radius c of the conical section 611 of the guide hole 61, and the larger end radius of the conical section 611 is required to cover the swing track of the screw tap 1, so that good positioning and guiding effects can be achieved.
The device for secondary threading of the threaded hole disclosed by the invention can compensate the positioning and orientation deviation between the screw tap 1 and the screw hole, thereby solving the problems of excessive cutting of the screw hole, damage of the screw tap 1 and fracture caused by interference in the secondary threading process, and providing an effective solution for automation of secondary threading of a large batch of threaded holes.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (10)
1. The utility model provides a device for screw hole secondary is crossed, includes tap (1) and is used for driving the rotatory moment of torsion input shaft (2) of tap (1), its characterized in that: torque input shaft (2) with be equipped with movable coupling assembling (3) between tap (1), movable coupling assembling (3) periphery is equipped with limit sleeve (4), limit sleeve (4) with the clearance has between movable coupling assembling (3).
2. The device for secondary threading of the threaded hole according to claim 1, characterized in that: the movable connecting assembly (3) comprises two sections of cross universal joints (31), and the torque input shaft (2) and the torque input shaft are connected with the cross universal joints (31) and the screw tap (1) in sequence.
3. The device for secondary threading of the threaded hole according to claim 1, characterized in that: the movable connecting assembly (3) comprises an elastic coupling.
4. The device for secondary threading of threaded holes according to any one of claims 1 to 3, characterized in that: an axial telescopic movable joint (5) is arranged between the screw tap (1) and the movable connecting component (3).
5. The device for secondary threading of threaded holes according to any one of claims 1 to 3, characterized in that: an axial telescopic movable joint (5) is arranged between the torque input shaft (2) and the movable connecting component (3).
6. The device for secondary threading of threaded holes according to any one of claims 1 to 3, characterized in that: and axial telescopic movable joints (5) are arranged between the screw tap (1) and the movable connecting assembly (3) and between the torque input shaft (2) and the movable connecting assembly (3).
7. The device for secondary threading of threaded holes according to any one of claims 1 to 3, characterized in that: the screw tap machining device is characterized by further comprising a guide plate (6), wherein a guide hole (61) used for guiding the screw tap (1) into a threaded hole to be machined is formed in the guide plate (6).
8. The device for secondary threading of threaded holes of claim 7, wherein: the guide hole (61) comprises a conical section (611) and a cylindrical section (612), and the cylindrical section (612) is connected with the smaller end of the conical section (611).
9. The device for twice threading of threaded holes of claim 8, wherein: spacing sleeve (4) with clearance between activity coupling assembling (3) is a, the maximum deviation between tap (1) and the screw hole is b, then a > b.
10. The device for secondary threading of threaded holes of claim 9, wherein: the larger end of the conical section (611) has a radius c, and c > a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111488865.3A CN114101813A (en) | 2021-12-07 | 2021-12-07 | Device for secondary threading of threaded hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111488865.3A CN114101813A (en) | 2021-12-07 | 2021-12-07 | Device for secondary threading of threaded hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114101813A true CN114101813A (en) | 2022-03-01 |
Family
ID=80367297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111488865.3A Pending CN114101813A (en) | 2021-12-07 | 2021-12-07 | Device for secondary threading of threaded hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114101813A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040208790A1 (en) * | 2003-04-21 | 2004-10-21 | Taigen Bioscience Corporation | Rotating and tapping apparatus |
| CN2658461Y (en) * | 2003-12-02 | 2004-11-24 | 邹建军 | Rigid flexible axle |
| KR100800107B1 (en) * | 2006-09-07 | 2008-01-31 | (주)성헌 | Tapping holder |
| CN202317318U (en) * | 2011-09-06 | 2012-07-11 | 北京南口轨道交通机械有限责任公司 | Flexible tapping clamp |
| CN202684239U (en) * | 2012-04-26 | 2013-01-23 | 东方电气集团东方汽轮机有限公司 | Portable machining device for internal threads |
| CN105033767A (en) * | 2015-08-13 | 2015-11-11 | 苏州金逸康自动化设备有限公司 | Automatic multi-axis tapping machine with monitoring function |
| CN208147070U (en) * | 2018-02-28 | 2018-11-27 | 苏州市伟业金属制品有限公司 | A kind of tapping tool of automobile handle |
| CN109079263A (en) * | 2018-10-22 | 2018-12-25 | Tcl王牌电器(惠州)有限公司 | Automatic tapping device |
| CN213379691U (en) * | 2020-07-16 | 2021-06-08 | 四川凌峰航空液压机械有限公司 | Ultra-thin and long rigid and flexible tapping rod |
-
2021
- 2021-12-07 CN CN202111488865.3A patent/CN114101813A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040208790A1 (en) * | 2003-04-21 | 2004-10-21 | Taigen Bioscience Corporation | Rotating and tapping apparatus |
| CN2658461Y (en) * | 2003-12-02 | 2004-11-24 | 邹建军 | Rigid flexible axle |
| KR100800107B1 (en) * | 2006-09-07 | 2008-01-31 | (주)성헌 | Tapping holder |
| CN202317318U (en) * | 2011-09-06 | 2012-07-11 | 北京南口轨道交通机械有限责任公司 | Flexible tapping clamp |
| CN202684239U (en) * | 2012-04-26 | 2013-01-23 | 东方电气集团东方汽轮机有限公司 | Portable machining device for internal threads |
| CN105033767A (en) * | 2015-08-13 | 2015-11-11 | 苏州金逸康自动化设备有限公司 | Automatic multi-axis tapping machine with monitoring function |
| CN208147070U (en) * | 2018-02-28 | 2018-11-27 | 苏州市伟业金属制品有限公司 | A kind of tapping tool of automobile handle |
| CN109079263A (en) * | 2018-10-22 | 2018-12-25 | Tcl王牌电器(惠州)有限公司 | Automatic tapping device |
| CN213379691U (en) * | 2020-07-16 | 2021-06-08 | 四川凌峰航空液压机械有限公司 | Ultra-thin and long rigid and flexible tapping rod |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220301 |