CN104325292A - Automobile tail throat pipe machining method - Google Patents
Automobile tail throat pipe machining method Download PDFInfo
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- CN104325292A CN104325292A CN201410559586.5A CN201410559586A CN104325292A CN 104325292 A CN104325292 A CN 104325292A CN 201410559586 A CN201410559586 A CN 201410559586A CN 104325292 A CN104325292 A CN 104325292A
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- bent limit
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
The invention provides an automobile tail throat pipe machining method. The automobile tail throat pipe machining method comprises the steps of a) stamping a sheet material to obtain a sheet with opposite two sides which are straight sides with equal length and other two sides which are curved sides, wherein the length of one curved side is smaller than the length of the other curved side; b) forming a plurality of circular holes in the sheet; c) bending the sheet, enabling the two straight sides to be fit, and then welding the two straight sides together to form a cylinder to obtain a semi-finished product which is featured by that the port of one end is large, the port of the other end is small, the side surface is gapless and the section of the side surface in the direction from one port to the other port is a straight side; d) removing welding burrs, putting the semi-finished product into a mold with a product shape, closing the mold and extruding to obtain a finished product; wherein in the step a, the length of one curved side is equal to the perimeter of one port, and the length of the other curved side is equal to the perimeter of the other port. By adopting the method, the thickness at different positions of the pipe is comparatively uniform, the finished product is not easily destroyed and the product qualification rate is high.
Description
Technical field
The present invention relates to a kind of car tail larynx pipe processing method.
Background technology
Car tail larynx is a kind of parts being arranged on the blast pipe tail end of automobile, it is except can preventing automobile tail gas pipe and being out of shape, can also play the effect of supercharging and flow-disturbing, thus the sound making the blast pipe of automobile send to a certain extent becomes slightly gentle and pleasing to the ear, reduces noise.
The caliber of the part that this pipe fitting of car tail larynx is generally connected with blast pipe is smaller, and the caliber of the other end is larger, and the tube wall of some car tail larynx is also provided with steam vent, and car tail larynx is the ladder pipe of multistage.In prior art, for this car tail trunnion part, be generally adopt pipe, then utilize drawing process, stretched each section is the ladder pipe of different tube diameters, and then punching obtains finished product on this ladder pipe, adopt in this way, stretched ladder pipe, the thickness that the difference due to caliber is each section is also different, in uneven thickness, and punch on pipe, cumbersome, easily damaged, cause product qualified rate lower.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the defect of prior art, provides one and is not easy breakage, and the thickness of pipe uniform car tail larynx pipe processing method.
For solving the problems of the technologies described above, the present invention proposes a kind of car tail larynx pipe processing method, and it comprises the following steps:
A, stamp out on sheet stock one opposition both sides be the straight flange that length is equal, both sides are the sheet material of bent limit shape in addition, and the length on one of them bent limit is less than the length on another bent limit;
B, on this sheet material, open multiple circular hole;
C, make two straight flanges laminatings by bending for sheet material, then welded together by two straight flanges, become tubular, the port forming one end is large, and other end port is little, sided seamless gap, and side is the semi-finished product of straight flange from Single port to the cross section on direction, another port;
Then semi-finished product are put into the mould with shape of product, after matched moulds, are squeezed into finished product by the burr of d, removal welding;
In described step a, the length on a bent limit equals the girth of a port of finished product, and the length on another bent limit equals the girth of another port of finished product.
After adopting said method, the present invention has the following advantages: the present invention utilizes sheet material, first cut out the shape of the side expansion being similar to tail trunnion, steam vent got by sheet material, and then bending be welded into tubular, and then the semi-finished product of this tubular are put into mould, utilize the core rod of mould and cavity extruded.This method no longer needs the technique stretched, and owing to being adopt sheet material processing, the Thickness Ratio everywhere of pipe is comparatively even, and finished product is not easy breakage, and product percent of pass is high.
A described Qu Bianwei arc, another Qu Bianwei waveform, the length on the bent limit of described arc is less than the length on the bent limit of waveform.The port of the circular flat mouth of the Qu Bianwei pipe fitting that like this length is less, another corrugated curved surface, the plane can doing outbound port place is not according to demand the port of plane.
A described bent limit is provided with locating notch.Adopt in this way, when semi-finished product put into mould, locating notch can be utilized to position semi-finished product position in a mold, facilitate following process.
The two ends of described each straight flange are equipped with protuberance, after the welding of c step completes, remove this protuberance.Adopt this structure, by time welded together for two straight flanges, provide the surplus of certain distance, prevent edge from having weld seam.
Accompanying drawing explanation
Fig. 1 is the sheet structure schematic diagram stamping out sheet material;
Fig. 2 is the half-finished structural representation formed after sheet material bends welding;
Fig. 3 is that the extruded structural representation of mould put into by mould and pipe fitting;
Fig. 4 is the structural representation of finished product.
As shown in the figure: 1, the first straight flange, the 2, second straight flange, the 3, first bent limit, the 4, second bent limit, 5, circular hole, 6, mould, 7, pipe fitting, 8, locating notch, 9, protuberance.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
As shown in Figure 1, Figure 2, Figure 3, Figure 4, the invention provides a kind of car tail larynx pipe processing method, it comprises the following steps:
A, stamp out on sheet stock one opposition both sides be the straight flange that length is equal, both sides are the sheet material of bent limit shape in addition, and the length on one of them bent limit is less than the length on another bent limit;
Namely the first straight flange 1, second straight flange 2 shown in Fig. 1, first bent limit 3 and the second bent limit 4, the length of described first straight flange 1 is equal with the length of the second straight flange 2, the length on the first bent limit 3 is equal with the girth of the first port of finished product, the length on the second bent limit 4 is equal with the girth of the second port of finished product, in the present embodiment, the first bent limit 3 is segmental arc, when so finally becoming pipe, the end face at the first port place is plane, second bent limit 4 is waveform, when so finally becoming pipe, the end face at the second port place is not be curved surface.
B, on this sheet material, open multiple circular hole; Circular hole, as the steam vent of tail larynx, finally when forming pipe fitting, all has multiple steam vent in the side of pipe fitting.
C, make two straight flanges laminatings by bending for sheet material, then welded together by two straight flanges, become tubular, the port forming one end is large, and other end port is little, sided seamless gap, and side is the semi-finished product of straight flange from Single port to the cross section on direction, another port;
Because sheet material is planar structure, so its cross section bending to half-finished side of tubular is straight flange, and namely refer to, half-finished side expands into plane, and obvious this shape with the finished product finally required or distinguishing.
Then semi-finished product are put into the mould with shape of product, after matched moulds, are squeezed into finished product by the burr of d, removal welding;
Semi-finished product are put into the mould with shape of product, by being squeezed into the shape required for product, now need bending half-finished side, because in previous step, the port section of pipe fitting completes, so in this mould, the port section of pipe fitting can not be subject to too large extruding, therefore the thickness of the pipe fitting of port section can keep level much the same with the thickness of sheet material, and the other parts of pipe fitting are squeezed be out of shape scope compared with semi-finished product, also less, therefore, the thickness of pipe fitting other parts does not have too large change yet.
The product of final formation, the Thickness Ratio everywhere of pipe fitting is more even, the port of the one end of the tail trunnion part that the application processes is circular ports, therefore when sheet material, this cambered surface is arc surface, and the mouth of pipe of the other end is the circular ports of cutting sth. askew, that is the plane at these two circular ports places is not two planes be parallel to each other.
Therefore man-hour is being added, the upper end of pipe fitting is needed to be clipped in the patrix of mould by core rod, by corresponding with counterdie for the lower end of mould, during mould matched moulds, promotion product moves downward, because the shape of the port below product is larger than the first half of counterdie, therefore, the lower port of product can't be squeezed, but the stage casing of product can be subject to the extruding of counterdie and produce distortion, because shape and the half-finished change in shape after distortion is little, therefore the thickness in stage casing can not change too greatly, until the lower port of product contacts with the latter half of counterdie.After matched moulds completes, because the lower port of product and the latter half of counterdie fit, although the shape of lower port changes, the girth of lower port does not change.Therefore the thickness of lower port part also can not change.
A described Qu Bianwei arc, another Qu Bianwei waveform, the length on the bent limit of described arc is less than the length on the bent limit of waveform.The port of the circular flat mouth of the Qu Bianwei pipe fitting that like this length is less, another corrugated curved surface, the plane can doing outbound port place is not according to demand the port of plane.The shape on certain two bent limits can set according to demand.
A described bent limit is provided with locating notch.Adopt in this way, when semi-finished product put into mould, locating notch can be utilized to position semi-finished product position in a mold, facilitate following process.
The two ends of described each straight flange are equipped with protuberance, after the welding of c step completes, remove this protuberance.Adopt this structure, by time welded together for two straight flanges, provide the surplus of certain distance, prevent edge from having weld seam.
Claims (4)
1. a car tail larynx pipe processing method, is characterized in that: it comprises the following steps:
A, stamp out on sheet stock one opposition both sides be the straight flange that length is equal, both sides are the sheet material of bent limit shape in addition, and the length on one of them bent limit is less than the length on another bent limit;
B, on this sheet material, open multiple circular hole;
C, make two straight flanges laminatings by bending for sheet material, then welded together by two straight flanges, become tubular, the port forming one end is large, and other end port is little, sided seamless gap, and side is the semi-finished product of straight flange from Single port to the cross section on direction, another port;
Then semi-finished product are put into the mould with shape of product, after matched moulds, are squeezed into finished product by the burr of d, removal welding;
In described step a, the length on a bent limit equals the girth of a port of finished product, and the length on another bent limit equals the girth of another port of finished product.
2. car tail larynx pipe processing method according to claim 1, is characterized in that: a described Qu Bianwei arc, another Qu Bianwei waveform, and the length on the bent limit of described arc is less than the length on the bent limit of waveform.
3. car tail larynx pipe processing method according to claim 1, is characterized in that: a described bent limit is provided with locating notch.
4. car tail larynx pipe processing method according to claim 1, is characterized in that: the two ends of described each straight flange are equipped with protuberance, after the welding of c step completes, removes this protuberance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410559586.5A CN104325292B (en) | 2014-10-21 | 2014-10-21 | A kind of car tail larynx pipe processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410559586.5A CN104325292B (en) | 2014-10-21 | 2014-10-21 | A kind of car tail larynx pipe processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104325292A true CN104325292A (en) | 2015-02-04 |
| CN104325292B CN104325292B (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410559586.5A Active CN104325292B (en) | 2014-10-21 | 2014-10-21 | A kind of car tail larynx pipe processing method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02294512A (en) * | 1989-05-08 | 1990-12-05 | Usui Internatl Ind Co Ltd | Exhaust gas purifier |
| JPH0994778A (en) * | 1995-07-27 | 1997-04-08 | Amada Co Ltd | Shape steel machining device |
| CN1837584A (en) * | 2005-03-22 | 2006-09-27 | 丰田自动车株式会社 | Pipe manufacturing method and inner pipe of double pipe |
| CN202741529U (en) * | 2012-02-14 | 2013-02-20 | 佛吉亚(青岛)排气系统有限公司 | Pipe end forming machine for auto exhaust pipe |
| CN103185194A (en) * | 2011-12-28 | 2013-07-03 | 上海日晗模具有限公司 | Pre-machining board for automobile vent-pipe |
| CN203271889U (en) * | 2013-04-28 | 2013-11-06 | 繁昌县金科机电科技有限公司 | Automobile exhause |
-
2014
- 2014-10-21 CN CN201410559586.5A patent/CN104325292B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02294512A (en) * | 1989-05-08 | 1990-12-05 | Usui Internatl Ind Co Ltd | Exhaust gas purifier |
| JPH0994778A (en) * | 1995-07-27 | 1997-04-08 | Amada Co Ltd | Shape steel machining device |
| CN1837584A (en) * | 2005-03-22 | 2006-09-27 | 丰田自动车株式会社 | Pipe manufacturing method and inner pipe of double pipe |
| CN103185194A (en) * | 2011-12-28 | 2013-07-03 | 上海日晗模具有限公司 | Pre-machining board for automobile vent-pipe |
| CN202741529U (en) * | 2012-02-14 | 2013-02-20 | 佛吉亚(青岛)排气系统有限公司 | Pipe end forming machine for auto exhaust pipe |
| CN203271889U (en) * | 2013-04-28 | 2013-11-06 | 繁昌县金科机电科技有限公司 | Automobile exhause |
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| Publication number | Publication date |
|---|---|
| CN104325292B (en) | 2016-05-25 |
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Address after: 315171 Zhejiang city of Ningbo province Yinzhou District jishigang town jcair Road No. 688 Patentee after: NINGBO SIMING AUTOMOBILE TECHNOLOGY CO., LTD. Address before: 315176 Ningbo Province, Yinzhou District Spring Industrial Park Road, Cai Cai road, No. 688 Patentee before: NINGBO SIMING AUTOMOBILE TECHNOLOGY CO., LTD. |
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Address after: No.688 Jucai Road, Wangchun Industrial Park, Haishu District, Ningbo City, Zhejiang Province Patentee after: NINGBO SIMING AUTOMOBILE TECHNOLOGY Co.,Ltd. Address before: No. 688, Jucai Road, jishigang Town, Yinzhou District, Ningbo City, Zhejiang Province Patentee before: NINGBO SIMING AUTOMOBILE TECHNOLOGY Co.,Ltd. |
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