CN101347804A - Hole-punching method of M6 nut press mounting hole of multiple unit at 300 kilometer per hour - Google Patents
Hole-punching method of M6 nut press mounting hole of multiple unit at 300 kilometer per hour Download PDFInfo
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- CN101347804A CN101347804A CNA2008101431220A CN200810143122A CN101347804A CN 101347804 A CN101347804 A CN 101347804A CN A2008101431220 A CNA2008101431220 A CN A2008101431220A CN 200810143122 A CN200810143122 A CN 200810143122A CN 101347804 A CN101347804 A CN 101347804A
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- punching
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- profile
- per hour
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- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a punching method used for a pressing hole of an M6 nut of a motor car with the speed of 300km/h, which comprises the steps as follows: procedure punching and shaping (1), polishing circumference (2), leveling and bending (3), welding and grinding (4), degreasing (5), pressing nut (6) and detecting (7); in the step of the procedure punching and shaping (1), one-step punch-forming of the single hole by numerical control is changed into two-step punch-forming, and the second punching is reaming. By improving the punching mode, the method of the invention ensures that the dimension precision of the processed hole completely meets the design requirement, avoids waste products, reduces the production cost, and is suitable for the localization of imported products and the usage for punching stamping parts by related production enterprises.
Description
Technical field
The present invention relates to the hole-punching method of 300 kilometers motor-car M6 of a kind of speed per hour nut press mounting hole.
Background technology
Introduce 300 kilometers railway motor-cars of speed per hour technology from MIT, it is very difficult to domesticize.Every technical indicator such as processing drawing, technological requirement and former drawing are consistent, so the mechanical processing difficulty of parts is high especially, traditional mechanical processing technique can't reach the drawing requirement at all.M6 nut press mounting hole punching as 300 kilometers railway motor-cars of speed per hour is exactly a typical example, and design drawing requires φ 8.5+0.1, and the processing technology of formulation had only the punching of the numerical control of employing punch die tool at that time.Factor control punch die tool punching periphery fracture belt accounts for thickness of slab 60%, causes the hole that 5～6 ° tapering is arranged, the requirement that is φ 8.8, does not reach φ 8.5+0.1 is surveyed at punching φ 8.5, the maximum position of reverse side on the 3mm aluminium sheet, roughness Ra value is 12.5, accounts for thickness of slab about 30% and is the fillet band for euphotic belt, 10%.The most of stress surface of nut press mounting press-fits the back Tightening moment and does not reach technological requirement, easily loosening after testing all in the fracture belt interval, and it is unsecured to press-fit quality.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, the method of twice punching of a kind of employing is provided, and the punching quality of guaranteeing 300 kilometers motor-car M6 of speed per hour nut press mounting hole can satisfy the hole-punching method of 300 kilometers motor-car M6 of speed per hour nut press mounting hole of the required precision of design drawing.
Purpose of the present invention is achieved by following technical proposals: comprise operation punching and profile, polishing periphery, leveling bending, weldering mill accent, degreasing, pressure nut and detection, described operation punching and profile are: the M6 nut press mounting hole need dash processing and a punch extermal form to same hole at twice with the punch die of two pairs of different sizes.
Described operation punching and profile adopt the punching of numerical control punch die tool to cooperate to fall profile to finish jointly.
Described operation punching and sharp processing go out the hole of diameter phi 8.5+0.1, twice punching die is respectively: the convex mould diameter φ 8.1 of one-off hole-piercing, die diameter phi 8.6; Secondary expands convex mould diameter φ 8.5, the die diameter phi 8.7 of punching.
Compared with prior art, the present invention has the following advantages: the dimensional accuracy that can guarantee the hole that processes adheres to specification fully, has stopped waste product, has reduced production cost.Method of the present invention is suitable for the introducing product production domesticization and associated production enterprise uses the sheet metal component punching.
Description of drawings
Fig. 1 is a process chart of the present invention;
Fig. 2 is the structural representation behind the M6 nut press mounting of the embodiment of the invention;
Among the figure: 1-punching and profile, 2-polishes periphery, 3-leveling bending, 4-weldering mill is transferred, the 5-degreasing, 6-presses nut, and 7-detects.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples:
With reference to accompanying drawing 1, the present invention includes operation punching and profile 1, polishing periphery 2, leveling bending 3, weldering mill accent 4, degreasing 5, pawl nut 6 and detect 7, described operation punching and profile 1 comprise that the M6 nut press mounting hole needs the punch die of two pairs of different sizes that same hole is dashed processing, a punch extermal form at twice.
Prior art is one-off hole-piercing and a punch extermal form, and the present invention changes one-off hole-piercing into twice punching.That is: single hole once is washed into shape by numerical control punch die tool and changes twice into and be washed into shape, has eliminated the formed taper hole of fillet band, fracture belt that one-off hole-piercing produces under the effect of expanding punching, and euphotic belt is increased to 95% by 30%.
Described operation punching and profile 1 adopt the numerical control press punching, cooperate to fall the profile mould to finish jointly.
Described operation punching and profile 1 process the hole of diameter phi 8.5+0.1, twice punching die is respectively: the convex mould diameter φ 8.1 of one-off hole-piercing, die diameter phi 8.6; Secondary expands convex mould diameter φ 8.5, the die diameter phi 8.7 of punching.
With reference to accompanying drawing 2, be the structural representation behind the M6 nut press mounting of the embodiment of the invention.
By technological process is determined in the analysis of motor-car M6 nut press mounting hole technical parameter, select suitable operation to improve the punching mode according to process characteristics, φ 8.5+0.1 hole is processed with two pairs of numerical control punch die tools by practice, 1 punching and 1 expansion punching have obtained satisfied effect.In the present embodiment, the convex mould diameter φ 8.1 of one-off hole-piercing, die diameter phi 8.6; Secondary expands piercing punch diameter phi 8.5, die diameter phi 8.7, at t 3mm 5052-o aluminium sheet upper punch nut press mounting hole φ 8.5+0.1; Actual measurement is φ 8.54 after twice punching, fillet band and the formed taper hole of fracture belt that 1 punching of mould produces have been eliminated simultaneously, euphotic belt is increased to 95% by original 20%, the surface roughness Ra value is increased to 1.6 by original 12.5, and the φ 8.5+0.1 that drawing and technological requirement have been satisfied in the hole has reached the quality level of triangular.The present invention has realized that processing technology innovation, quality are provided quality goods or brilliant, cost reduces.
Claims (3)
1. the hole-punching method of 300 kilometers motor-car M6 of speed per hour nut press mounting hole, comprise operation punching and profile (1), polishing periphery (2), leveling bending (3), weldering mill accent (4), degreasing (5), press nut (6) and detect (7) that it is characterized in that: described operation punching and profile (1) are twice punching and a punching press profile.
2. the hole-punching method of 300 kilometers motor-car M6 of speed per hour according to claim 1 nut press mounting hole is characterized in that: described operation punching and profile (1) adopt numerical control punch die tool once to finish.
3. the hole-punching method of 300 kilometers motor-car M6 of speed per hour according to claim 1 and 2 nut press mounting hole is characterized in that: described operation punching and profile (1) process the hole of diameter phi 8.5+0.1, twice punching die is respectively: the convex mould diameter φ 8.1 of one-off hole-piercing, die diameter phi 8.6; Secondary expands convex mould diameter φ 8.5, the die diameter phi 8.7 of punching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101431220A CN101347804A (en) | 2008-09-02 | 2008-09-02 | Hole-punching method of M6 nut press mounting hole of multiple unit at 300 kilometer per hour |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101431220A CN101347804A (en) | 2008-09-02 | 2008-09-02 | Hole-punching method of M6 nut press mounting hole of multiple unit at 300 kilometer per hour |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101347804A true CN101347804A (en) | 2009-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101431220A Pending CN101347804A (en) | 2008-09-02 | 2008-09-02 | Hole-punching method of M6 nut press mounting hole of multiple unit at 300 kilometer per hour |
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| CN (1) | CN101347804A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103846336A (en) * | 2012-12-04 | 2014-06-11 | 庄河市天成机械有限公司 | Finish machining process for cold-punching special-shaped square holes |
| CN108817200A (en) * | 2018-06-21 | 2018-11-16 | 无锡臻致精工科技有限公司 | Improve the processing method and application of hole expansibility |
| CN112122801A (en) * | 2020-09-11 | 2020-12-25 | 宁夏如意科技时尚产业有限公司 | Method for recycling idle horn mouth |
-
2008
- 2008-09-02 CN CNA2008101431220A patent/CN101347804A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103846336A (en) * | 2012-12-04 | 2014-06-11 | 庄河市天成机械有限公司 | Finish machining process for cold-punching special-shaped square holes |
| CN108817200A (en) * | 2018-06-21 | 2018-11-16 | 无锡臻致精工科技有限公司 | Improve the processing method and application of hole expansibility |
| CN112122801A (en) * | 2020-09-11 | 2020-12-25 | 宁夏如意科技时尚产业有限公司 | Method for recycling idle horn mouth |
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Open date: 20090121 |