CN115246060A - Machining method for threaded hole of stamping swing yoke - Google Patents
Machining method for threaded hole of stamping swing yoke Download PDFInfo
- Publication number
- CN115246060A CN115246060A CN202110459772.1A CN202110459772A CN115246060A CN 115246060 A CN115246060 A CN 115246060A CN 202110459772 A CN202110459772 A CN 202110459772A CN 115246060 A CN115246060 A CN 115246060A
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- hole
- processing
- machining
- adopted
- threaded hole
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000003754 machining Methods 0.000 title claims description 25
- 238000002844 melting Methods 0.000 claims abstract description 18
- 238000010079 rubber tapping Methods 0.000 claims abstract description 15
- 230000008018 melting Effects 0.000 claims abstract description 9
- 238000001125 extrusion Methods 0.000 claims abstract description 7
- 238000005553 drilling Methods 0.000 claims abstract description 5
- 238000007781 pre-processing Methods 0.000 claims abstract description 4
- 239000000758 substrate Substances 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 238000005461 lubrication Methods 0.000 claims description 6
- 238000003672 processing method Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 7
- 238000004080 punching Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention discloses a method for processing a threaded hole of a punching swing yoke, which comprises the following steps: a blind hole is preprocessed on the workpiece, and the aperture of the processed blind hole is smaller than that of a bottom hole before tapping; pre-processing a through hole, and drilling a through hole section with the aperture smaller than that of the blind hole at the upper part at the lower part of the blind hole; processing a bush, carrying out hot melting processing on the whole through hole through a hot melting drill, and extruding a workpiece at the bottom of the through hole to form a downward convex bush; washing the end face of the substrate of the bushing to be flat; and (4) tapping, namely adopting an extrusion tapping process of chipless processing. According to the invention, the bushing is processed through the hot melting drill, so that a complex welding process can be avoided, the thread processing is carried out in a chipless processing mode, the thread number can be increased on a plate with limited thickness, and the thread pulling-out force is improved.
Description
Technical Field
The invention relates to a metal plate stamping part thread process, in particular to a method for machining a threaded hole of a stamping swing yoke.
Background
As shown in fig. 1, the stamped oscillating yoke 1 is a sheet metal stamped part, belongs to a key component of a steering system intermediate shaft, and plays a role in transmitting and changing steering torque. The part is provided with an M8 threaded hole 2, belongs to a client interface, is connected with a steering engine or a steering column, and has certain requirements on the pulling-out force of the threads, so that certain requirements on the number of turns of the threads are met. Typically, the number of threads is increased by increasing the thickness of the sheet or welding the nut. However, in the former case, increasing the thickness of the plate not only increases the weight and cost of the parts, but also increases the size of the space of the parts, and thus the weight reduction of the automobile cannot be satisfied at present. For the latter, a welding process is generally adopted for welding and assembling the stamping part and the nut together, but the welding process not only increases the purchasing cost of nut parts, but also has the defects of insufficient solder, desoldering and the like due to the welding quality, and is difficult to avoid in the production process, thus being a great problem for after-sale.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a processing method of a threaded hole of a punching swing yoke.
The invention discloses a processing method of a threaded hole of a punching swing yoke, which comprises the following steps of:
1. a blind hole is preprocessed on a workpiece, redundant materials are removed by adopting an isometric principle, and the aperture of the processed blind hole is smaller than that of a bottom hole before tapping;
2. pre-processing a through hole, and drilling a through hole section with the aperture smaller than that of the upper blind hole at the lower part of the blind hole;
3. processing a bush, carrying out hot melting processing on the whole through hole through a hot melting drill, and extruding a workpiece at the bottom of the through hole to form a downward convex bush;
4. washing the end face of the substrate of the bushing;
5. tapping, namely adopting an extrusion tapping process of chipless processing.
In the first step, a numerical control machining center and a hard alloy drill bit are adopted for blind hole machining, an external cooling mode is adopted, and machining parameters are as follows: s =5000r/min, F =1100mm/min.
In the second step, a numerical control machining center and a hard alloy drill bit are adopted for via hole machining, an external cooling mode is adopted, and the machining parameters are as follows: s =6000r/min, F =480mm/min.
In the third step, the bushing is machined by adopting a numerical control machine and a hot-melting drill, the hot-melting drill is cooled and lubricated by adopting hot-melting paste for each machined part, and the machining parameters are as follows: s =2250r/min, F =350mm/min, and the entire via hole, including the bushing, is expanded to form a bottomed hole of the desired hole diameter before tapping.
In the fourth step, the end face of the bottom of the bushing is milled and processed by adopting a numerical control machine tool and an end mill, an external cooling mode is adopted, and the processing parameters are as follows: s =5000r/min, F =1336mm/min.
In step five, the numerical control machine tool and the extrusion screw tap are adopted to perform thread processing on the inside of the whole bottom hole, the lubrication mode adopts oil injection lubrication, and the processing parameters are as follows: s =900r/min, F =1125mm/min.
The processing method for the threaded hole of the stamping swing yoke has the following beneficial effects that:
drilling through the hot melt and processing the bush, can avoiding complicated welding process to adopt chipless processing mode to carry out thread machining, can realize increasing the screw thread number on the panel of limited thickness, promote the screw thread and draw off power, compare with prior art, this technology machining efficiency is higher, and environmental protection more is applicable to mass production more.
Drawings
FIG. 1 is a schematic view of a swing yoke;
fig. 2 to 6 are schematic diagrams illustrating steps one to five of the processing method of the present invention, respectively.
Detailed Description
The method for machining the threaded hole of the stamped oscillating yoke according to the invention is further described below with reference to the accompanying drawings and examples.
The invention relates to a processing method of a threaded hole of a punching swing yoke, which specifically comprises the following steps:
1. a blind hole is preprocessed on a workpiece, redundant materials are removed by adopting the isovolumetric principle, the aperture of the processed blind hole is smaller than that of a bottom hole before tapping,
2. pre-processing a through hole, and drilling a through hole section with the aperture smaller than that of the blind hole at the upper part at the lower part of the blind hole;
3. processing a bush, performing hot melting processing on the whole through hole through a hot melting drill, and extruding a workpiece at the bottom of the through hole to form a downward convex bush;
4. washing the end face of the substrate of the bushing to be flat;
5. tapping, namely adopting an extrusion tapping process of chipless processing.
Referring to fig. 2 to 6, taking a 6.0mm swing yoke as an example, the finished thread is M8 × 1.25, the effective length of the thread is 9mm Min, and the thread pull-off force satisfies >38100N, which is specifically exemplified:
in the first step, a numerical control machining center and a hard alloy drill bit with the diameter of 6.8mm are adopted to drill a blind hole 3 with the diameter of 6.8mm on a workpiece, an external cooling mode is adopted, and the machining parameters are as follows: s =5000r/min, F =1100mm/min.
In the second step, a numerical control machining center and a hard alloy drill bit with the diameter of 3.0mm are adopted to drill a through hole 4 with the diameter of 3.0mm, an external cooling mode is adopted, and the machining parameters are as follows: s =6000r/min, F =480mm/min.
In step three, the bushing 4 is machined by adopting a numerical control machine and a hot-melting drill, the hot-melting drill is cooled and lubricated by adopting hot-melting paste every time one piece of machining is carried out, and the machining parameters are as follows: s =2250r/min, F =350mm/min, and the entire via hole including the bush 4 is expanded to form the bottomed hole 5 of the desired bore diameter (Φ 7.38 mm) before tapping.
In step four, adopt digit control machine tool and end mill to mill flat processing to bush bottom terminal surface 41 to make the distance between work piece upper surface and the bush bottom terminal surface be required 9mm that end hole 5 length reaches, also can the deburring simultaneously, adopt the cooling method of outer cold, the processing parameter is: s =5000r/min, F =1336mm/min.
In step five, the numerical control machine tool and the extrusion screw tap are adopted to perform thread processing on the inside of the whole bottom hole, the lubrication mode adopts oil injection lubrication, and the processing parameters are as follows: s =900r/min, F =1125mm/min to obtain the threaded hole 2 of the desired size.
However, those skilled in the art should realize that the above embodiments are illustrative only and not limiting to the present invention, and that changes and modifications to the above described embodiments are intended to fall within the scope of the appended claims, provided they fall within the true spirit of the present invention.
Claims (6)
1. A processing method of a threaded hole of a stamping swing yoke is characterized in that: the method comprises the following steps:
1. a blind hole is preprocessed on a workpiece, redundant materials are removed by adopting an isometric principle, and the aperture of the processed blind hole is smaller than that of a bottom hole before tapping;
2. pre-processing a through hole, and drilling a through hole section with the aperture smaller than that of the upper blind hole at the lower part of the blind hole;
3. processing a bush, carrying out hot melting processing on the whole through hole through a hot melting drill, and extruding a workpiece at the bottom of the through hole to form a downward convex bush;
4. washing the end face of the substrate of the bushing;
5. and (4) tapping, namely adopting an extrusion tapping process of chipless processing.
2. The method for machining the threaded hole of the stamped oscillating yoke according to claim 1, wherein: in the first step, a numerical control machining center and a hard alloy drill bit are adopted for blind hole machining, an external cooling mode is adopted, and machining parameters are as follows: s =5000r/min, F =1100mm/min.
3. The method for machining the threaded hole of the stamped oscillating yoke according to claim 1, wherein: in the second step, a numerical control machining center and a hard alloy drill bit are adopted for via hole machining, an external cooling mode is adopted, and the machining parameters are as follows: s =6000r/min, F =480mm/min.
4. The method for machining the threaded hole of the stamped swing yoke according to claim 1, wherein the method comprises the following steps: in the third step, the bushing is machined by adopting a numerical control machine and a hot-melting drill, the hot-melting drill is cooled and lubricated by adopting hot-melting paste for each machined part, and the machining parameters are as follows: s =2250r/min, F =350mm/min, and the entire via hole, including the bushing, is expanded to form a bottomed hole of the desired hole diameter before tapping.
5. The method for machining the threaded hole of the stamped swing yoke according to claim 1, wherein the method comprises the following steps: in the fourth step, the end face of the bottom of the bushing is milled and processed by adopting a numerical control machine tool and an end mill, an external cooling mode is adopted, and the processing parameters are as follows: s =5000r/min, F =1336mm/min.
6. The method for machining the threaded hole of the stamped swing yoke according to claim 1, wherein the method comprises the following steps: in step five, the numerical control machine tool and the extrusion screw tap are adopted to perform thread processing on the inside of the whole bottom hole, the lubrication mode adopts oil injection lubrication, and the processing parameters are as follows: s =900r/min, F =1125mm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110459772.1A CN115246060A (en) | 2021-04-27 | 2021-04-27 | Machining method for threaded hole of stamping swing yoke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110459772.1A CN115246060A (en) | 2021-04-27 | 2021-04-27 | Machining method for threaded hole of stamping swing yoke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115246060A true CN115246060A (en) | 2022-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110459772.1A Pending CN115246060A (en) | 2021-04-27 | 2021-04-27 | Machining method for threaded hole of stamping swing yoke |
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| Country | Link |
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| CN (1) | CN115246060A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0352518A2 (en) * | 1988-07-25 | 1990-01-31 | TOKAI TRW & CO., LTD. | Method of manufacturing a single-piece valve sleeve |
| JPH06134538A (en) * | 1992-10-26 | 1994-05-17 | Daihatsu Motor Co Ltd | Method for forming screw hole on panel |
| JPH0796339A (en) * | 1993-09-29 | 1995-04-11 | Canon Precision Inc | Tapping method |
| JPH0970638A (en) * | 1995-09-05 | 1997-03-18 | Matsushita Electric Ind Co Ltd | Tap forming pressing method |
| JP2011088190A (en) * | 2009-10-23 | 2011-05-06 | Iwai Metal (America) Co Ltd | Method for manufacturing mounting hardware having blind nut and tapping tool used therefor |
| JP2014200876A (en) * | 2013-04-03 | 2014-10-27 | 株式会社稲葉製作所 | Plate female screw formation method and plate with screw hole |
| CN206084485U (en) * | 2016-10-12 | 2017-04-12 | 天津商业大学 | Porous thin wall cam plate processing location frock |
| CN109624895A (en) * | 2018-12-30 | 2019-04-16 | 舒兰市通用机械有限责任公司 | A kind of truck bumper crossbeam and its manufacturing method with threaded hole |
| JP2020015071A (en) * | 2018-07-26 | 2020-01-30 | キヤノン株式会社 | Fastening structure, image formation device and processing method |
| CN110831324A (en) * | 2019-06-17 | 2020-02-21 | 江西比亚迪电子部品件有限公司 | Novel blind hole and processing method thereof |
-
2021
- 2021-04-27 CN CN202110459772.1A patent/CN115246060A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0352518A2 (en) * | 1988-07-25 | 1990-01-31 | TOKAI TRW & CO., LTD. | Method of manufacturing a single-piece valve sleeve |
| JPH06134538A (en) * | 1992-10-26 | 1994-05-17 | Daihatsu Motor Co Ltd | Method for forming screw hole on panel |
| JPH0796339A (en) * | 1993-09-29 | 1995-04-11 | Canon Precision Inc | Tapping method |
| JPH0970638A (en) * | 1995-09-05 | 1997-03-18 | Matsushita Electric Ind Co Ltd | Tap forming pressing method |
| JP2011088190A (en) * | 2009-10-23 | 2011-05-06 | Iwai Metal (America) Co Ltd | Method for manufacturing mounting hardware having blind nut and tapping tool used therefor |
| JP2014200876A (en) * | 2013-04-03 | 2014-10-27 | 株式会社稲葉製作所 | Plate female screw formation method and plate with screw hole |
| CN206084485U (en) * | 2016-10-12 | 2017-04-12 | 天津商业大学 | Porous thin wall cam plate processing location frock |
| JP2020015071A (en) * | 2018-07-26 | 2020-01-30 | キヤノン株式会社 | Fastening structure, image formation device and processing method |
| CN109624895A (en) * | 2018-12-30 | 2019-04-16 | 舒兰市通用机械有限责任公司 | A kind of truck bumper crossbeam and its manufacturing method with threaded hole |
| CN110831324A (en) * | 2019-06-17 | 2020-02-21 | 江西比亚迪电子部品件有限公司 | Novel blind hole and processing method thereof |
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