CN101480978A - Integral bike metal seat tube and molding method thereof - Google Patents
Integral bike metal seat tube and molding method thereof Download PDFInfo
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- CN101480978A CN101480978A CNA2009101052271A CN200910105227A CN101480978A CN 101480978 A CN101480978 A CN 101480978A CN A2009101052271 A CNA2009101052271 A CN A2009101052271A CN 200910105227 A CN200910105227 A CN 200910105227A CN 101480978 A CN101480978 A CN 101480978A
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- installation portion
- horizontal installation
- pipe
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Abstract
The invention discloses an integral type bicycle metal seat tube which comprises a vertical tube body and a horizontal installing part. The integral type bicycle metal seat tube is characterized in that the vertical tube body and the horizontal installing part are integrally molded by jointless metal tube fittings, and a cavity is formed in the horizontal installing part. In the integral type bicycle metal seat tube, the cavity is left in the horizontal installing part which is directly molded and processed by the jointless metal tube fittings rather than a solid to reduce the weight of a finished product, and meanwhile, the thickness and the length of the tube fittings can be preset. When the integral type bicycle metal seat tube is processed, alloy tube fitting sectional materials with proper thickness and length can be selected. The integral type bicycle metal seat tube has high processing precision and attractive appearance, is not easy to waste materials and can reduce the production cost. The invention also provides a molding method of the integral type bicycle metal seat tube.
Description
Technical field
The present invention relates to a kind of bicycle assembly parts, relate in particular to a kind of bike metal seat tube, also relate to the forming method of this bike metal seat tube.
Background technology
Bike metal seat tube of the prior art generally is made up of vertical body and horizontal installation portion, vertically body and horizontal installation portion welding fabrication.Such bicycle saddle tube is owing to be by welding fabrication, and the weld is sealing-off or fracture easily in the process of riding, and has potential safety hazard.For this reason, the bicycle saddle tube (shown in Figure 1A) of integral type and the forming method (shown in Figure 1B) of this integral bike seat pipe once appearred on the market, the bicycle saddle tube of this integral type by solid bar or solid profile mold pressing, take out the pipe moulding, the bicycle saddle tube that has overcome welding fabrication is shortcoming such as fracture easily.Yet because by solid bar or section bar compression molding, its horizontal installation portion is solid, increases the weight of car body voluntarily easily, low, the long bad control in the end of product precision also causes the waste of material easily.This exposes the great limit under the situation that resource is poor day by day, cost of material is high, world economic environment is bad.In addition, there is the technology prejudice that can only be processed by solid bar or solid profile in bike metal seat tube.
Summary of the invention
First purpose of the present invention is can't be by the technology prejudice of fitting to fitting machine-shaping in order to overcome the deficiencies in the prior art and integral bike seat pipe, provide a kind of directly by the integral bike seat pipe of metal tube machine-shaping, this integral bike seat pipe intensity height, in light weight, precision is high, good looking appearance, cost are low.
Another object of the present invention be for provide a kind of can be with the forming method of the direct machine-shaping integral bike of metal tube seat pipe.
In order to achieve the above object, the present invention is by the following technical solutions:
A kind of integral bike metal seat tube comprises vertical body and horizontal installation portion, and vertically body and horizontal installation portion are one-body molded by jointless metal tube, forms cavity in the horizontal installation portion.
Described horizontal installation portion forms reinforced rib, alleviates groove and core-drawing hole after draw mold pressing.
Described horizontal installation portion forms expander moulding and pore after draw extruding.
A kind of forming method of integral bike metal seat tube may further comprise the steps:
A, the draw carry out the draw by draw equipment to adding metal tube one end in advance, make its reduced diameter to pre-set dimension;
B, compression molding are inserted the metal tube behind the draw in the mould of preset shape and are carried out mold pressing or extrusion forming, form the vertical body and the horizontal installation portion of bicycle saddle tube;
C, take out pipe, external diameter expanded and draws processing in the vertical body after the compression molding was carried out, and made its pipe fitting thickness and length reach the preset standard pipe fitting.
The forming method of described integral bike seat pipe may further comprise the steps:
A
1, by the draw equipment preparative treatment metal tube one end is carried out the draw, make a termination closely seal shape and form necking end, for the horizontal installation portion of compression molding bicycle saddle tube is prepared;
B
1, compression molding, necking end inserted in the upper and lower mould that is provided with the gauge member external styling carries out mold pressing, form the standard external moulding and have reinforced rib, alleviate the horizontal installation portion of bicycle of groove and core-drawing hole;
C
1, take out pipe, to finish the vertical body of bicycle saddle tube after the compression molding carry out in external diameter expand and draw processing, make its thickness of pipe and length reach expectation standard pipe fitting.
The forming method of described integral bike metal seat tube may further comprise the steps:
A
2, the draw, by draw equipment one end of preparative treatment metal tube is carried out the draw, make its reduced diameter to pre-set dimension, form draw section, become the vertical body of bicycle saddle tube to prepare for taking out pipe;
B
21, compression molding, the draw section behind the draw is inserted between sound two clampings, one section internal diameter matches with the external diameter of the pipe fitting draw one end behind the two clamping matched moulds, other end internal diameter is greater than original pipe fitting external diameter; Behind the sound clamping matched moulds, use the not draw one end of preset shape drift extrusion metal pipe fitting, finish the moulding of mold pressing for the first time, form the horizontal installation portion blank of bicycle saddle tube;
B
22, compression molding for the second time, adopt default other drift that the horizontal installation portion of finishing after the mold pressing for the first time of bicycle saddle tube is carried out mold pressing second time, reach and preset the pipe fitting external styling;
C
2, take out pipe, to finish the vertical body of bicycle saddle tube after the compression molding carry out in external diameter expand and draw processing, make its thickness of pipe and length reach expectation standard pipe fitting.
Adopt said structure, the horizontal installation portion after integral bike seat pipe of the present invention is processed by seamless metal pipe fitting straight forming stays cavity rather than solid, has reduced finished weight; Simultaneously, owing to can pre-set pipe wall thickness and length, add man-hour as long as select the alloy pipe fitting section bar of suitable thickness and length, higher, the good looking appearance of working accuracy is difficult for causing the waste of material, reduces production costs.Simultaneously, overcome the technology prejudice of prior art.
Description of drawings
Fig. 1 is the structural representation of integral bike seat pipe in the prior art;
Fig. 2 is the structural representation of first kind of embodiment of the present invention;
Fig. 3 is the structural representation of second kind of embodiment of the present invention;
Fig. 4 is the forming method diagram of circuit of integral bike seat pipe of the present invention;
Fig. 5 is the forming method scheme drawing of first kind of embodiment of the present invention;
Fig. 6 is the forming method scheme drawing of second kind of embodiment;
The specific embodiment
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Be illustrated in figure 2 as the structural representation of first kind of embodiment of integral bike metal seat tube, a kind of integral bike metal seat tube, comprise vertical body and horizontal installation portion, vertically body and horizontal installation portion are one-body molded by metal tube, and horizontal installation portion forms reinforced rib 11, alleviates groove 12 and core-drawing hole 13.Because vertically body and horizontal installation portion are one-body molded by metal tube, form reinforced rib 11 simultaneously, alleviated groove 12 and core-drawing hole 13, strengthen the compressive strength of bicycle saddle tube, alleviated the weight of bicycle saddle tube, improved formed precision, reduced cost.
Be illustrated in figure 3 as the structural representation of second embodiment of integral bike metal seat tube, a kind of integral bike metal seat tube, comprise vertical body and horizontal installation portion, vertically body and horizontal installation portion are one-body molded by metal tube, and horizontal installation portion forms expander moulding 52 and pore 33.Because vertically body and horizontal installation portion are one-body molded by metal tube, horizontal installation portion forms expander moulding 52 and pore 33, has alleviated the weight of bicycle saddle tube, has improved formed precision, cost-cutting.
Be a kind of forming method diagram of circuit of integral bike metal seat tube among Fig. 4, comprise with a step:
A, the draw carry out the draw by draw equipment to adding metal tube one end in advance, make its reduced diameter to pre-set dimension;
B, compression molding are inserted the metal tube behind the draw in the mould of preset shape and are carried out mold pressing or extrusion forming, form the vertical body and the horizontal installation portion of bicycle saddle tube;
C, take out pipe, external diameter expanded and draws processing in the vertical body after the compression molding was carried out, and made its pipe fitting thickness and length reach the preset standard pipe fitting.
C, D are the forming method of first kind of embodiment of the present invention among Fig. 5, and as can be seen from Figure, a kind of forming method of integral bike metal seat tube may further comprise the steps:
A
1, the metal tube draw, metal tube 10 is carried out the draw forges, make draw termination closely seal shape, and form necking end 14 and inner core 15, for compression molding is prepared;
B
1, compression molding, the metal tube 10 of the draw is inserted between the upper and lower mould 18,19 with corresponding die cavity 16,17, necking end 14 is inserted in the knock hole 20 of counterdie 19 1 sides.Wherein die cavity 16,17 forms the convex-concave shape of the moulding 11,12 of corresponding metal tube 10.When upper and lower mould 18,19 pressings, just can make pipe fitting 10 form corresponding reinforced rib 11 and alleviate groove 12, thereby the inner core 15 of pipe fitting 10 can be pressed into also that special-shaped core-drawing hole 13. has improved the compressive strength of metal tube 10 and aesthetics with the moulding of its die cavity 16,17 and to the reduction of its weight simultaneously.Because the thickest of finished product is a bit larger tham or equals in two wall thickness additions of pipe fitting 10 original design, so pipe fitting 10 is difficult for distortion arbitrarily when compression molding.
C
1, take out pipe, after metal tube 10 is via compression molding, metal tube 10 is carried out first expander to expand the trombone slide special machine, draw thin the processing again, make metal tube 10 exhausted most inside and outside radius wall thickness degree equalizations, also can accomplish long specification.By above-mentioned forming method is plastic integral bike metal seat tube.
E, F are the forming method of second kind of embodiment of the present invention among Fig. 6, and as can be seen from Figure, a kind of integral bike forming method may further comprise the steps:
A
2, the draw, by draw equipment one end of preparative treatment metal tube 30 is carried out the draw, make its reduced diameter to pre-set dimension, form draw section 34, become the vertical body of bicycle saddle tube to prepare for taking out pipe;
B
21, the mold pressing expander, draw section 34 is inserted between sound two clampings 37,38 with corresponding die cavity 35,36, wherein die cavity 35,36 forms the ears 39,40 of corresponding pipe fitting 30.Outside drift 41 has and die cavity 35,36 less relative ears 42,43.Behind sound clamping 37,38 matched moulds, the intervention of outside drift 41 is pushed, and forms pipe fitting 30 another distortion bodys 44.
B
22, compression molding, distortion body 44 is inserted between another two clampings 47,48 of sound with corresponding die cavity 45,46, wherein die cavity 45,46 forms another ears 31,32 of corresponding pipe fitting 30 finished products.Another outside drift 49 has and die cavity 45,46 less relative ears 50,51.Behind sound clamping 47,48 matched moulds, secondary extrusion is carried out in the intervention of outside drift 49, forms the final expander moulding 52 and the pore 33 of pipe fitting 30.
C
2, take out pipe, pipe fitting 30 is via after the compression molding, pipe fitting 30 carried out to expand the trombone slide special machine first expander post-tensioning is thin to be handled, and makes pipe fitting 30 exhausted most inside and outside radius wall thickness degree equalizations, also can accomplish long specification.
Form the final finished 53 of pipe fitting 30 by above-mentioned forming method.
Claims (6)
1, a kind of integral bike metal seat tube comprises vertical body and horizontal installation portion, it is characterized in that: vertically body and horizontal installation portion are one-body molded by jointless metal tube, form cavity in the horizontal installation portion.
2, integral bike metal seat tube according to claim 1 is characterized in that described horizontal installation portion forms reinforced rib, alleviates groove and core-drawing hole after draw mold pressing.
3, integral bike metal seat tube according to claim 1 is characterized in that described horizontal installation portion forms expander moulding and pore after draw extruding.
4, the forming method of the described integral bike metal seat tube of a kind of claim 1 may further comprise the steps:
A, the draw carry out the draw by draw equipment to adding metal tube one end in advance, make its reduced diameter to pre-set dimension;
B, compression molding are inserted the metal tube behind the draw in the mould of preset shape and are carried out mold pressing or extrusion forming, form the vertical body and the horizontal installation portion of bicycle saddle tube;
C, take out pipe, external diameter expanded and draws processing in the vertical body after the compression molding was carried out, and made its pipe fitting thickness and length reach the preset standard pipe fitting.
5, the forming method of integral bike seat pipe according to claim 4 is characterized in that may further comprise the steps:
A
1, by the draw equipment preparative treatment metal tube one end is carried out the draw, make a termination closely seal shape and form necking end, for the horizontal installation portion of compression molding bicycle saddle tube is prepared;
B
1, compression molding, necking end inserted in the upper and lower mould that is provided with the gauge member external styling carries out mold pressing, form the standard external moulding and have reinforced rib, alleviate the horizontal installation portion of bicycle of groove and core-drawing hole;
C
1, take out pipe, to finish the vertical body of bicycle saddle tube after the compression molding carry out in external diameter expand and draw processing, make its thickness of pipe and length reach expectation standard pipe fitting.
6, the forming method of integral bike metal seat tube according to claim 4 is characterized in that may further comprise the steps:
A
2, the draw, by draw equipment one end of preparative treatment metal tube is carried out the draw, make its reduced diameter to pre-set dimension, form draw section, become the vertical body of bicycle saddle tube to prepare for taking out pipe;
B
21, compression molding, the draw section behind the draw is inserted between sound two clampings, one section internal diameter matches with the external diameter of the pipe fitting draw one end behind the two clamping matched moulds, other end internal diameter is greater than original pipe fitting external diameter; , behind the sound clamping matched moulds,, finish the moulding of mold pressing for the first time with the preset shape drift extrusion metal pipe fitting draw one end not, form the horizontal installation portion blank of bicycle saddle tube;
B
22, compression molding for the second time, adopt default other drift that the horizontal installation portion of finishing after the mold pressing for the first time of bicycle saddle tube is carried out mold pressing second time, reach and preset the pipe fitting external styling;
C
2, take out pipe, to finish the vertical body of bicycle saddle tube after the compression molding carry out in external diameter expand and draw processing, make its thickness of pipe and length reach expectation standard pipe fitting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101052271A CN101480978A (en) | 2009-01-21 | 2009-01-21 | Integral bike metal seat tube and molding method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101052271A CN101480978A (en) | 2009-01-21 | 2009-01-21 | Integral bike metal seat tube and molding method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101480978A true CN101480978A (en) | 2009-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009101052271A Pending CN101480978A (en) | 2009-01-21 | 2009-01-21 | Integral bike metal seat tube and molding method thereof |
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| CN (1) | CN101480978A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105364425A (en) * | 2015-12-17 | 2016-03-02 | 毕国伟 | Manufacturing method of novel bicycle handlebar |
| CN110466658A (en) * | 2019-01-18 | 2019-11-19 | 天成车料（深圳）有限公司 | Electric bicycle integral type upper tube and hydro-forming method |
| CN111546002A (en) * | 2020-05-11 | 2020-08-18 | 明达铝业科技(太仓)有限公司 | Integrated forming process for producing rear controller shell of lower tube of electric bicycle |
-
2009
- 2009-01-21 CN CNA2009101052271A patent/CN101480978A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105364425A (en) * | 2015-12-17 | 2016-03-02 | 毕国伟 | Manufacturing method of novel bicycle handlebar |
| CN110466658A (en) * | 2019-01-18 | 2019-11-19 | 天成车料（深圳）有限公司 | Electric bicycle integral type upper tube and hydro-forming method |
| CN111546002A (en) * | 2020-05-11 | 2020-08-18 | 明达铝业科技(太仓)有限公司 | Integrated forming process for producing rear controller shell of lower tube of electric bicycle |
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Open date: 20090715 |