CN105328088A - Cross wedge rolling end forming method for closing and opening united rolled stub-bar-free shaft piece - Google Patents
Cross wedge rolling end forming method for closing and opening united rolled stub-bar-free shaft piece Download PDFInfo
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- CN105328088A CN105328088A CN201510749605.5A CN201510749605A CN105328088A CN 105328088 A CN105328088 A CN 105328088A CN 201510749605 A CN201510749605 A CN 201510749605A CN 105328088 A CN105328088 A CN 105328088A
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- wedge
- rolling
- plane
- angle
- rolled piece
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/18—Making articles shaped as bodies of revolution cylinders, e.g. rolled transversely cross-rolling
Abstract
The invention discloses a cross wedge rolling end forming method for a closing and opening united rolled stub-bar-free shaft piece. The method is characterized by including the steps that a primary end closing type rolling section and a secondary end closing type rolling section are sequentially arranged at the start portion of a cross wedge rolling die, the portions, from the end heads to the inner side, of the two ends of a rolled piece are subjected to closing type rolling twice through the primary end closing type rolling section and the secondary end closing type rolling section, after rolling, the end heads of the two ends of the rolled piece are conic, and the ends and the unrolled portion in the middle of the rolled piece are in transition through conic steps; and opening type rolling is then performed in a conventional manner on the rolled piece from the conic steps to the end heads, so that the shaft piece free of a stub bar is obtained, wherein the ends of the shaft piece are stepped shafts. The method has the beneficial effects that the end forming quality of the shaft piece is guaranteed, the size of the stub bar of the machined shaft piece is small, the efficient, high-performance, less-chip or chip-free accurate size forming purpose is achieved, production efficiency of cross wedge rolling is greatly improved, and the method is particularly suitable for rolling the shaft piece with the ends being stepped shafts.
Description
Technical field
The present invention relates to the moulding shaping of shaft forgings, particularly relate to the cross wedge rolling end formed method of a kind of make and break associating rolling without material-head shaft like members.
Background technology
Cross wedge rolling is a kind of metal forming technology efficiently, be the near-net-shape technique grown up in recent decades both at home and abroad, with traditional cutting, forge axial workpiece and compare, 3 ~ 4 times can be enhanced productivity, improve stock utilization 20 ~ 40%, reduce production cost about 30%.But cross wedge rolling technique mainly adopts open type rolling up to now, namely be axially rolled to two ends by the middle part of axle during rolling, in the open type operation of rolling, due to faster than the axial flow velocity of heart portion metal by the coating metal of rolled piece, often formed the recessed heart by the end of rolled piece.In actual production, usually need the distortion allowance reserving 6 ~ 10mm in end during design billet size, by recessed for end heart Partial Resection after rolling completes, this stock utilization that cross wedge rolling is processed can only reach about 80%.Therefore, search out suitable method, avoid stub bar to produce the stock utilization tool improving cross wedge rolling and be of great significance.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of cross wedge rolling end formed method of make and break associating rolling without material-head shaft like members that can improve stock utilization while realizing shaft forgings Accurate Shaping.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of make and break associating rolling is without the end formed method of cross wedge rolling of material-head shaft like members, first by enclosed rolling, the termination, two ends of rolled piece is rolled into taper shape, pass through open type rolling again by the end roll forming of rolled piece, and do not produce stub bar, concrete steps are:
(1), end enclosed rolling section and second time end enclosed rolling section is for the first time set gradually at the start-up portion of cross wedge rolling die, by first time end enclosed rolling section and second time end enclosed rolling section, from termination, twice enclosed rolling is inwardly carried out to the end, two ends of rolled piece, after rolling, coning, and the non-rolling section in the middle part of end and rolled piece is by type conical bench transition in the termination, two ends of rolled piece;
(2), from the type conical bench place of rolled piece carry out open type rolling in the usual way to termination, obtain end be multidiameter without material-head shaft like members.
In described step (1), first time end enclosed rolling section comprises the first gear wedge and the first shaping wedge that are wholely set on cross wedge rolling die, described first gear wedge is positioned at the outside of the first described shaping wedge, the inner side of described first gear wedge is the first inclined plane, the first described shaping wedge is provided with contoured side recessed down near the side of described first gear wedge, the first described inclined plane and described contoured side form a V-type groove, the first described inclined plane and the angle of vertical plane are 10 ° ~ 50 °, described contoured side and the angle of vertical plane are 20 ° ~ 60 °, the inner side of the first described shaping wedge is provided with first step inclined-plane, described first step inclined-plane and the angle of horizontal plane equal the forming angle of the first described shaping wedge, second time end enclosed rolling section comprises the second gear wedge and the second shaping wedge that are wholely set on cross wedge rolling die, described second gear wedge is positioned at the outside of the second described shaping wedge, the medial surface of described second gear wedge is the second inclined plane, the second described inclined plane and the angle of vertical plane equal the first described inclined plane and the angle of vertical plane, the outside of the second described shaping wedge is connected with described second gear wedge one, the inner side of the second described shaping wedge is provided with second step inclined-plane, described second step inclined-plane and the angle of horizontal plane equal the forming angle of the second described shaping wedge, the forming angle of the second described shaping wedge is identical with the first shaping wedge of broadening angle all with described.
Compared with prior art, advantage of the present invention is owing to setting gradually first time end enclosed rolling section and second time end enclosed rolling section at the start-up portion of cross wedge rolling die, first by twice enclosed rolling, the termination, two ends of rolled piece is rolled into taper shape, pass through open type rolling again by the end roll forming of rolled piece, make the termination of open type rolling sequence rolled piece obtain the recessed heart to compensate, greatly reduce and roll rear the formed recessed heart, cross wedge rolling stock utilization has been had and significantly improves; And pass through the design of first time end enclosed rolling section with the concrete structure of second time end enclosed rolling section, ensure that the end formed quality of shaft forgings, make to process the shaft forgings stub bar volume obtained little, achieve high-efficient high performance, few cutting or be shaped without cutting precise volumes, substantially increase the production efficiency of cross wedge rolling, the method is specially adapted to the shaft forgings that rolling end is multidiameter.
Accompanying drawing explanation
Fig. 1 is the side view of cross wedge rolling die of the present invention;
Fig. 2 is the front view of cross wedge rolling die of the present invention;
Fig. 3 is the structural representation after half cross wedge rolling die of the present invention launches;
Fig. 4 is the cross sectional representation of first time of the present invention end enclosed rolling section;
Fig. 5 is the cross sectional representation of enclosed rolling section in second time end of the present invention;
Fig. 6 is the structural representation of rolled piece after first time enclosed rolling of half of the present invention;
Fig. 7 is the structural representation of rolled piece after the rolling of second time enclosed of half of the present invention;
Fig. 8 is the finished product schematic diagram that the present invention finally obtains after open type rolling.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment, the present invention is described in further detail.
As shown in the figure, the termination, two ends of rolled piece 1, without the end formed method of cross wedge rolling of material-head shaft like members, is first rolled into taper shape by enclosed rolling by make and break associating rolling, then by open type rolling by the end roll forming of rolled piece 1, and do not produce stub bar, concrete steps are:
(1), first time end enclosed rolling section A and second time end enclosed rolling section B is set gradually at the start-up portion of cross wedge rolling die 2, first time end enclosed rolling section A comprises the first gear wedge 3 and the first shaping wedge 4 that are wholely set on cross wedge rolling die 2, first gear wedge 3 is positioned at the outside of the first shaping wedge 4, the inner side of first gear wedge 3 is the first inclined plane 31, first shaping wedge 4 is provided with contoured side 41 recessed down near the side of first gear wedge 3, first inclined plane 31 forms a V-type groove 5 with contoured side 41, first inclined plane 31 is 30 ° with the angle theta 1 of vertical plane, contoured side 41 is 40 ° with the angle theta 2 of vertical plane, the inner side of the first shaping wedge 4 is provided with first step inclined-plane 42, the angle α of first step inclined-plane 42 and horizontal plane
1equal the forming angle of the first shaping wedge 4, the forming angle of the first shaping wedge 4 and broadening angle press the conventional design of corresponding size on cross wedge rolling die, second time end enclosed rolling section B comprises the second gear wedge 6 and the second shaping wedge 7 that are wholely set on cross wedge rolling die 2, second gear wedge 6 is positioned at the outside of the second shaping wedge 7, the medial surface of second gear wedge 6 is the second inclined plane 61, second inclined plane 61 and the angle theta 3 of vertical plane equal the angle theta 1 of the first inclined plane 31 and vertical plane, the outside of the second shaping wedge 7 is connected with second gear wedge 6 one, the inner side of the second shaping wedge 7 is provided with second step inclined-plane 71, the angle α of second step inclined-plane 71 and horizontal plane
2equal the forming angle of the second shaping wedge 7, the forming angle of the second shaping wedge 7 is all identical with the first shaping wedge 4 with broadening angle,
(2), by first time end enclosed rolling section A, from termination, first time enclosed rolling is inwardly carried out to the end, two ends of rolled piece 1, obtain shape as shown in Figure 6, then by second time end enclosed rolling section B, from termination, the rolling of second time enclosed is inwardly carried out to the end, two ends of rolled piece 1, after rolling, the termination, two ends of rolled piece 1 coning 11, and the non-rolling section in the middle part of end and rolled piece is by type conical bench 12 transition, as shown in Figure 7;
(3), finally from type conical bench 12 place of rolled piece 1, carry out open type rolling in the usual way to termination, obtain end be multidiameter without material-head shaft like members, as shown in Figure 8.
In above-described embodiment, the first inclined plane 31 can be selected with the angle theta 1 of vertical plane in the scope of 10 ° ~ 50 °, and contoured side 41 can be selected with the angle theta 2 of vertical plane in the scope of 20 ° ~ 60 °.
Claims (2)
1. a make and break associating rolling is without the end formed method of cross wedge rolling of material-head shaft like members, it is characterized in that first by enclosed rolling, the termination, two ends of rolled piece being rolled into taper shape, pass through open type rolling again by the end roll forming of rolled piece, and do not produce stub bar, concrete steps are:
(1), end enclosed rolling section and second time end enclosed rolling section is for the first time set gradually at the start-up portion of cross wedge rolling die, by first time end enclosed rolling section and second time end enclosed rolling section, from termination, twice enclosed rolling is inwardly carried out to the end, two ends of rolled piece, after rolling, coning, and the non-rolling section in the middle part of end and rolled piece is by type conical bench transition in the termination, two ends of rolled piece;
(2), from the type conical bench place of rolled piece carry out open type rolling in the usual way to termination, obtain end be multidiameter without material-head shaft like members.
2. a kind of make and break associating rolling as claimed in claim 1 is without the end formed method of cross wedge rolling of material-head shaft like members, it is characterized in that in described step (1), first time end enclosed rolling section comprises the first gear wedge and the first shaping wedge that are wholely set on cross wedge rolling die, described first gear wedge is positioned at the outside of the first described shaping wedge, the inner side of described first gear wedge is the first inclined plane, the first described shaping wedge is provided with contoured side recessed down near the side of described first gear wedge, the first described inclined plane and described contoured side form a V-type groove, the first described inclined plane and the angle of vertical plane are 10 ° ~ 50 °, described contoured side and the angle of vertical plane are 20 ° ~ 60 °, the inner side of the first described shaping wedge is provided with first step inclined-plane, described first step inclined-plane and the angle of horizontal plane equal the forming angle of the first described shaping wedge, second time end enclosed rolling section comprises the second gear wedge and the second shaping wedge that are wholely set on cross wedge rolling die, described second gear wedge is positioned at the outside of the second described shaping wedge, the medial surface of described second gear wedge is the second inclined plane, the second described inclined plane and the angle of vertical plane equal the first described inclined plane and the angle of vertical plane, the outside of the second described shaping wedge is connected with described second gear wedge one, the inner side of the second described shaping wedge is provided with second step inclined-plane, described second step inclined-plane and the angle of horizontal plane equal the forming angle of the second described shaping wedge, the forming angle of the second described shaping wedge is identical with the first shaping wedge of broadening angle all with described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510749605.5A CN105328088B (en) | 2015-11-06 | 2015-11-06 | Cross wedge rolling end forming method for closing and opening united rolled stub-bar-free shaft piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510749605.5A CN105328088B (en) | 2015-11-06 | 2015-11-06 | Cross wedge rolling end forming method for closing and opening united rolled stub-bar-free shaft piece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105328088A true CN105328088A (en) | 2016-02-17 |
| CN105328088B CN105328088B (en) | 2017-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510749605.5A Active CN105328088B (en) | 2015-11-06 | 2015-11-06 | Cross wedge rolling end forming method for closing and opening united rolled stub-bar-free shaft piece |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110369495A (en) * | 2019-07-24 | 2019-10-25 | 山东泰金精锻股份有限公司 | A kind of pre- sub-material concentration molding cross wedge rolling technique |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1469774A (en) * | 1975-03-19 | 1977-04-06 | Mitsubishi Heavy Ind Ltd | Roll-forming |
| RU2368448C1 (en) * | 2008-02-22 | 2009-09-27 | Государственное Научное Учреждение "Физико-Технический Институт Национальной Академии Наук Беларуси" | Manufacturing method of products of type stepped shaft by cross-wedge rolling |
| CN101722185A (en) * | 2009-11-26 | 2010-06-09 | 宁波大学 | Method for rolling feed head-free cross wedge rolling of axial parts |
| CN101758149A (en) * | 2010-01-29 | 2010-06-30 | 山东中兴汽车零部件有限公司 | Rotator shaft residual material-free obliquely and transversely rolling method and special mold |
| CN102125930A (en) * | 2010-12-27 | 2011-07-20 | 宁波大学 | Feed head-free cross wedge rolling and forming method for axial parts |
-
2015
- 2015-11-06 CN CN201510749605.5A patent/CN105328088B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1469774A (en) * | 1975-03-19 | 1977-04-06 | Mitsubishi Heavy Ind Ltd | Roll-forming |
| RU2368448C1 (en) * | 2008-02-22 | 2009-09-27 | Государственное Научное Учреждение "Физико-Технический Институт Национальной Академии Наук Беларуси" | Manufacturing method of products of type stepped shaft by cross-wedge rolling |
| CN101722185A (en) * | 2009-11-26 | 2010-06-09 | 宁波大学 | Method for rolling feed head-free cross wedge rolling of axial parts |
| CN101758149A (en) * | 2010-01-29 | 2010-06-30 | 山东中兴汽车零部件有限公司 | Rotator shaft residual material-free obliquely and transversely rolling method and special mold |
| CN102125930A (en) * | 2010-12-27 | 2011-07-20 | 宁波大学 | Feed head-free cross wedge rolling and forming method for axial parts |
Non-Patent Citations (1)
| Title |
|---|
| 程超: "《闭式楔横轧成形轴类件及其端部质量研究》", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110369495A (en) * | 2019-07-24 | 2019-10-25 | 山东泰金精锻股份有限公司 | A kind of pre- sub-material concentration molding cross wedge rolling technique |
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| CN105328088B (en) | 2017-04-26 |
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