CN104550299A - Motorcycle steering column tapered tube processing mold - Google Patents
Motorcycle steering column tapered tube processing mold Download PDFInfo
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- CN104550299A CN104550299A CN201410754638.4A CN201410754638A CN104550299A CN 104550299 A CN104550299 A CN 104550299A CN 201410754638 A CN201410754638 A CN 201410754638A CN 104550299 A CN104550299 A CN 104550299A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/08—Dies or mandrels with section variable during extruding, e.g. for making tapered work; Controlling variation
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Abstract
The invention provides a motorcycle steering column tapered tube processing mold. The motorcycle steering column tapered tube processing mold comprises convex molds and concave molds, wherein two groups of cold extruding molds formed by two convex molds and two concave molds are formed on the same pair of molds, a concave mold cavity of each of the first group of the cold extruding molds is a preliminary forming cavity, the preliminary forming cavity is formed by sequentially connecting a maximum equal-diameter section, a tapered section and a relatively small equal-diameter section into a whole in a smooth transition mode, a concave mold cavity of each of the second group of the cold extruding molds is a pinching forming cavity, the pinching forming cavity is formed by sequentially connecting a maximum equal-diameter section, a tapered section, a relatively small equal-diameter section and a minimum equal-diameter section into a whole in a smooth transition mode, and a section of convex mold guide cavity is respectively arranged at the upper ends of the concave mold cavities of the two groups of the cold extruding molds. According to the motorcycle steering column tapered tube processing mold provided by the invention, raw materials required for manufacturing a motorcycle steering column tapered tube are low in cost, the strength of a large end of the produced tapered tube can be greatly improved, and cracks cannot be produced on the large end of the tapered tube in a production process, so that the motorcycle steering column tapered tube processing mold is high in qualified rate of products, stable and reliable in device operation and long in service life.
Description
Technical field
The present invention relates to cold extrusion making device, especially the cold-extrusion shaping processing mold of direction column of motorcycle conical pipe.
Background technology
Cold extrusion technology processing and manufacturing conical pipe is adopted to have certain difficulty, when reason is that punch and die relative motion squeeze out taper, a harmful horizontal component can be produced, this not only requires high to mould, also easily there is crackle and cause low qualified in product, especially just all the more so as this long product of direction column of motorcycle conical pipe.Therefore, in the processing of direction column of motorcycle conical pipe in early days, usual employing be that formed by forging is carried out to round steel blank, because formed by forging technique exists waste material, production efficiency is low and percent defective is high problem, in recent years, someone breaks through Traditional Thinking limitation, in employing cold-extrusion technology processing and manufacturing direction column of motorcycle conical pipe, carried out some bold trials.
As being CN1232366C at notification number, the day for announcing is on December 21st, 2005, in the Chinese invention patent that name is called " method and the device of motorcycle direction conical riser are produced in cold extrusion ", utilizing the acting in conjunction of reaming mould and contracting hoop mould, is conical riser by isodiametric pipe blank through two to three step cold-extrusion shapings.Be CN100441369C at notification number, the day for announcing is on December 10th, 2008, name is called in the Chinese invention patent of " directional axial conical standpipe process of motorcycle by disposable cold extruding formative machining ", being then adopt the cold extrusion device having the guiding cold extruding upper male die of column sleeve and lower cavity die to be combined into high rigid high strength, is conical riser by equal diameter pipe blank extrusion molding once.
In above-mentioned two patents, method therefor and device are compared with the technique of traditional heating formed by forging, although all significantly enhance production efficiency, save labour, reduce manufacturing cost, but the die in its cold-extrusion shaping device is all made up of contracting hoop mould and reaming mould, particularly middle and later periods shaping stage in forming process, pipe blank also exists the deformation of contracting hoop and reaming simultaneously, the deformation of reaming is just started when pipe blank does not also enter into matrix cavity completely, be easy to like this occur crackle at reaming end, affect the qualification rate of product.Moreover, large end is formed because needs carry out reaming, for guaranteeing the intensity of final products, in the selection of pipe blank, wall thickness be selected to be greater than the thick raw material of the large end wall of finished product conical pipe, but raw-material wall thickness again can not be too large, the shaping of small end is unfavorable for because too thick, this is often difficult to take into account, and consider cost factor, the intensity of the large end of finished product conical pipe that actual production goes out is all generally on the low side.
Summary of the invention
The object of this invention is to provide a kind of direction column of motorcycle conical pipe processing mold, straight shape steel pipe blank substep in two cold extrusion die cavitys is little by little extruded, and the metal structure of gained finished product is more even, fine and close, enhances productivity simultaneously.
For realizing above-mentioned technical purpose, direction column of motorcycle conical pipe processing mold provided by the invention, include punch and die, and there are the two groups of cold extruding dies formed by two punch and two dies on same secondary mould, the matrix cavity of first group of cold extruding die is preliminarily forming chamber, by maximum equal diameter section, conical section, less equal diameter section is connected as a single entity successively and seamlessly transits, the matrix cavity of second group of cold extruding die is contracting hoop forming cavity, by maximum equal diameter section, conical section, less equal diameter section and minimum equal diameter section are connected as a single entity successively and seamlessly transit, all there is one section of punch directed cavity the matrix cavity upper end of two groups of cold extruding dies.
Maximum equal diameter section in two groups of cold extruding die matrix cavity, conical section, less equal diameter section and minimum equal diameter section match with the corresponding section of steering column conical pipe external diameter.Straight shape steel pipe blank is preliminarily forming conical section in the matrix cavity of first group of cold extruding die first, obtains conical pipe half form part; The matrix cavity of second group of cold extruding die proceeds extruding to conical pipe half form part, to contract further hoop and then the maximum equal diameter section that is shaped, conical section, less equal diameter section and minimum equal diameter section to conical pipe half form part.The conical pipe finished metal that can make finally to obtain that is little by little extruded step by step is organized more even, fine and close, also can enhance productivity significantly simultaneously.
The internal diameter of directed cavity is equal with the external diameter of pipe blank, and in the later stage of cold-extrusion shaping, punch end protrudes in the directed cavity of die and extrudes blank end face.
Die is stacked in die sleeve by two or more mold cavity block and forms, and end cap is fixedly equipped with in the upper end of die sleeve, is convenient to like this process die, reduces processing and manufacturing cost, is also convenient to assemble.
Matrix cavity due to two groups of cold extruding dies does not have ream forming chamber, and during work, punch end only applies axial compressive force to pipe blank, and pipe blank is in conical pipe process in extrusion, and the flow direction of metal, except axis, is mainly radial direction inwards.Two patents being CN1232366C with CN100441369C with notification number are compared, and produce the conical pipe of same size, the wall thickness of required raw material and pipe blank is smaller, and caliber is then larger.In steel market, the tubing price that external diameter is large, wall thickness is little is relatively cheap, and the cost of raw material thus required for the present invention is low.Because the large end at conical pipe is without reaming crimp, after cold extrusion operation, the pipe thickness of large end does not reduce, consistent with the wall thickness of raw material pipe blank, the intensity of large end obtains Reliable guarantee, and crackle can not be there is because of reaming crimp in large end, add the guide effect of directed cavity, greatly can improve the qualification rate of product.
The technique effect that the present invention obtains is: the cost of raw material manufactured needed for direction column of motorcycle conical pipe is low, the intensity of its large end of the conical pipe produced is greatly improved, and in production, the large end of conical pipe there will not be crackle, and product percent of pass is high, plant running is reliable and stable, long service life.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is elaborated.
As shown in Figure 1, direction column of motorcycle conical pipe processing mold of the present invention, include punch and die, same secondary mould has the two groups of cold extruding dies formed by two punch and two dies, be respectively the first punch 1, second punch 2, first die 3, second die 4, the matrix cavity of the first group of cold extruding die be made up of the first punch 1, first die 3 is preliminarily forming chamber, is connected as a single entity successively by maximum equal diameter section 5, conical section 6, less equal diameter section 7 and is seamlessly transitted; The matrix cavity of the second group of cold extruding die be made up of the second punch 2, second die 4 is contracting hoop forming cavity, be connected as a single entity successively by maximum equal diameter section 8, conical section 9, less equal diameter section 10 and minimum equal diameter section 11 and seamlessly transitted, all there is one section of punch directed cavity 12 the matrix cavity upper end of two groups of cold extruding dies.
Maximum equal diameter section in two groups of cold extruding die matrix cavity, conical section, less equal diameter section and minimum equal diameter section match with the corresponding section of steering column conical pipe external diameter.Straight shape steel pipe blank is preliminarily forming conical section in the matrix cavity of first group of cold extruding die first, obtains conical pipe half form part; The matrix cavity of second group of cold extruding die proceeds extruding to conical pipe half form part, to contract further hoop and then the maximum equal diameter section that is shaped, conical section, less equal diameter section and minimum equal diameter section to conical pipe half form part.The conical pipe finished metal that can make finally to obtain that is little by little extruded step by step is organized more even, fine and close, also can enhance productivity significantly simultaneously.
The internal diameter of contracting hoop forming cavity maximum equal diameter section 8 is equal with the internal diameter of directed cavity 12, avoids ream forming occurs.
The matrix cavity of two groups of cold extruding dies is all be stacked in die sleeve 13 li by two or more mold cavity block and form, end cap 14 is fixedly equipped with in the upper end of die sleeve 13, so not only be convenient to the processing of mould, reduce manufacture difficulty and the cost of mould, mold cavity block and die sleeve also can select different materials as required, and mold cavity block can be changed.
Die is fixed on die socket 15, punch is fixed on convex mould base 16, die socket 15 is provided with lead 17, convex mould base 16 is provided with fairlead 18, cooperatively interact between lead 17 and fairlead 18 during cold extrusion work, utilize the guide effect between lead 17 and fairlead 18, make cold extrusion working stability, reliably, improve die life.During use, die socket 15 is fixed on the workbench of forcing press, and convex mould base 16 is fixed on the lifting platform of forcing press.
Punch end is provided with positioning boss 19, and the diameter of positioning boss 19 is consistent with the aperture of pipe blank, and during cold extrusion work, this positioning boss 19 stretches into pipe blank endoporus, and positioning boss 19 makes the movement of pipe blank in die stablize.
Claims (5)
1. a direction column of motorcycle conical pipe processing mold, include punch and die, it is characterized in that: there are the two groups of cold extruding dies formed by two punch and two dies on same secondary mould, the matrix cavity of first group of cold extruding die is preliminarily forming chamber, by maximum equal diameter section, conical section, less equal diameter section is connected as a single entity successively and seamlessly transits, the matrix cavity of second group of cold extruding die is contracting hoop forming cavity, by maximum equal diameter section, conical section, less equal diameter section and minimum equal diameter section are connected as a single entity successively and seamlessly transit, all there is one section of punch directed cavity the matrix cavity upper end of two groups of cold extruding dies.
2. a kind of direction column of motorcycle conical pipe processing mold as claimed in claim 1, is characterized in that: the internal diameter of described contracting hoop forming cavity maximum equal diameter section is equal with the internal diameter of directed cavity.
3. a kind of direction column of motorcycle conical pipe processing mold as claimed in claim 1, is characterized in that: described die is stacked in die sleeve by two or more mold cavity block and forms, and end cap is fixedly equipped with in the upper end of die sleeve.
4. a kind of direction column of motorcycle conical pipe processing mold as claimed in claim 1, it is characterized in that: described die is fixed on die socket, punch is fixed on convex mould base, die socket is provided with lead, convex mould base is provided with fairlead, cooperatively interacts between lead and fairlead during cold extrusion work.
5. a kind of direction column of motorcycle conical pipe processing mold as claimed in claim 1, it is characterized in that: described punch end is provided with positioning boss, the diameter of positioning boss is consistent with the aperture of pipe blank, and during cold extrusion work, this positioning boss stretches into pipe blank endoporus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410754638.4A CN104550299A (en) | 2014-12-11 | 2014-12-11 | Motorcycle steering column tapered tube processing mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410754638.4A CN104550299A (en) | 2014-12-11 | 2014-12-11 | Motorcycle steering column tapered tube processing mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104550299A true CN104550299A (en) | 2015-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410754638.4A Pending CN104550299A (en) | 2014-12-11 | 2014-12-11 | Motorcycle steering column tapered tube processing mold |
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| CN (1) | CN104550299A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107639126A (en) * | 2017-11-09 | 2018-01-30 | 江苏启力锻压机床有限公司 | Horizontal bimodulus cold extruding mechanism and shaping production technology |
-
2014
- 2014-12-11 CN CN201410754638.4A patent/CN104550299A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107639126A (en) * | 2017-11-09 | 2018-01-30 | 江苏启力锻压机床有限公司 | Horizontal bimodulus cold extruding mechanism and shaping production technology |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150429 |
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| WD01 | Invention patent application deemed withdrawn after publication |