CN102151779A - Interference fit structure of tooth profile and lintel angle of bottom die of hot-forging die of automobile reversed gear - Google Patents
Interference fit structure of tooth profile and lintel angle of bottom die of hot-forging die of automobile reversed gear Download PDFInfo
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- CN102151779A CN102151779A CN 201010588592 CN201010588592A CN102151779A CN 102151779 A CN102151779 A CN 102151779A CN 201010588592 CN201010588592 CN 201010588592 CN 201010588592 A CN201010588592 A CN 201010588592A CN 102151779 A CN102151779 A CN 102151779A
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- interference fit
- lintel
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Abstract
The invention discloses an interference fit structure of tooth profile and lintel angles of a bottom die of a hot-forging die of an automobile reversed gear. The structure comprises a bottom die and a die core which are matched in a sheathing way, wherein the bottom die is equipped with two die cavities, namely an upper die cavity arranged above the inner end surface of the bottom die and a lower die cavity arranged under the inner end surface of the bottom die, and the outer wall of the upper die cavity is in a tooth shape. In the structure, since the plane of the inner end surface is leveled with tooth tips in the upper die cavity, smooth transition between the tooth profile of the upper die cavity and the inner end surface is formed, and no dead air space is remained, thus causing no obstacles to die filling of billet during the hot forging process, facilitating interference fit between the tooth profile and the lintel angles, and greatly improving qualification rate of the product; and by adopting the smooth transition structure, the forged workpiece is easily demolded, thus saving aided working hours, improving production efficiency. The interference fit structure is particularly applicable to large quantity production of the hot forging structures.
Description
Technical field
The present invention relates to a kind of hot-forging die structure, specifically, the present invention relates to a kind of profile of tooth and lintel angular excess mode structure of automotive reverse gear gear hot-forging die bed die.
Background technology
The automotive reverse gear gear is a kind of driving member that turns round under low speed, heavy load operating mode, this gear belongs to straight-tooth distortion roller gear, its architectural feature as shown in Figure 5 and Figure 6, the gear two ends are the evagination round platform, the tooth both sides are the inclined-plane and are provided with guide angle, this kind profile of tooth is difficult to realize the processing that is shaped with the machine cut method, adopts the mould hot forging forming usually.Fixed hot-forging die bed die is provided with two die cavitys by the automotive reverse gear gear structure, and in the recessed inner face of upper cavity crown down, upper cavity volume ratio lower mode cavity is big.Lower mode cavity is filled with by blank prior to upper cavity during forge hot, the blank of lower mode cavity and filling forms interference fit, make the air row in the upper cavity not go out, the air that remains in the upper cavity further is squeezed to crown portion by follow-up filling blank, the compressed air that occupies certain space hinders tooth portion and is shaped, its result causes the lintel angle of upper cavity crown insufficient fill, particularly crown to wane, and this defective is to cause the one of the main reasons of scrapping in batches.Prior art is in order to overcome above-mentioned defective, crown portion at upper cavity offers as Fig. 3 or venthole C shown in Figure 4, for compressed air provides drain passage, this improvement has the good effect that improves the shaping of tooth portion, and its side effect is also arranged, the one, venthole is easily overflowed into the formation latch structure by blank, increase workpiece demoulding difficulty, the 2nd, lubricant that forge hot is used and oxide skin are fallen into wherein and are stopped up, and venthole loses due scavenging action, cleaning out pore must increase unproductive time, increases labour intensity.
Summary of the invention
The present invention is primarily aimed at the deficiencies in the prior art, a kind of profile of tooth and lintel angular excess mode structure of automotive reverse gear gear hot-forging die bed die are proposed, the upper cavity inner face flushes with down crown in this structure, does not form the dead angle that takes air in, accomplishes that residual air drains unimpeded.
The present invention is achieved through the following technical solutions technical goal.
The profile of tooth of automotive reverse gear gear hot-forging die bed die and lintel angular excess mode structure, it comprises the bed die and the core rod of phase fit.It is the upper cavity and the lower mode cavity on boundary that described bed die is provided with the inner face, and the upper cavity outer wall is a profile of tooth.Its improvements are: the plane of bed die inner face flushes with crown.
The present invention compared with prior art has following good effect:
1, the plane of upper cavity inner face and crown flush arrangement are simple, easily make;
2, the plane of upper cavity inner face flushes with crown, does not take the dead angle of air in, and the blank mold filling is accessible during forge hot, makes that tooth portion and lintel angular excess mould are easy;
3, upper cavity and lower mode cavity seamlessly transit, after the forge hot workpiece demoulding easy, the production efficiency height.
Description of drawings
Fig. 1 is a structural profile schematic diagram of the present invention.
Fig. 2 is Fig. 1 A place partial structurtes enlarged diagram.
Fig. 3 is a prior art structural profile schematic diagram.
Fig. 4 is Fig. 3 A place partial structurtes enlarged diagram, and C is a venthole among the figure.
Fig. 5 is an automotive reverse gear gear structure schematic diagram.
Fig. 6 is the profile of tooth schematic diagram of Fig. 5.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments below.
The profile of tooth of automotive reverse gear gear hot-forging die bed die shown in Figure 1 and lintel angular excess mode structure, it comprises the bed die 1 and the core rod 2 of phase fit.Bed die 1 is provided with two die cavitys, and on its inner face 1.1 is upper cavity, under be lower mode cavity, the upper cavity outer wall is a profile of tooth.Down crown flushes in the plane of inner face 1.1 and the upper cavity as shown in Figure 2, and this structure forms the nature transition, does not take the dead angle of air in, and the blank mold filling is accessible during forge hot, makes that profile of tooth and lintel angular excess mould are easy, improves product percent of pass greatly.Owing to adopt to seamlessly transit structure, after the forge hot workpiece demoulding easy, save unproductive time, improved production efficiency.
Claims (1)
1. the profile of tooth of an automotive reverse gear gear hot-forging die bed die and lintel angular excess mode structure, it comprises the bed die (1) and the core rod (2) of phase fit; It is the upper cavity and the lower mode cavity on boundary that described bed die (1) is provided with inner face (1.1), and the upper cavity outer wall is a profile of tooth; It is characterized in that: the plane of bed die (1) inner face (1.1) flushes with crown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010588592 CN102151779A (en) | 2010-12-15 | 2010-12-15 | Interference fit structure of tooth profile and lintel angle of bottom die of hot-forging die of automobile reversed gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010588592 CN102151779A (en) | 2010-12-15 | 2010-12-15 | Interference fit structure of tooth profile and lintel angle of bottom die of hot-forging die of automobile reversed gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102151779A true CN102151779A (en) | 2011-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010588592 Pending CN102151779A (en) | 2010-12-15 | 2010-12-15 | Interference fit structure of tooth profile and lintel angle of bottom die of hot-forging die of automobile reversed gear |
Country Status (1)
| Country | Link |
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| CN (1) | CN102151779A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624904A (en) * | 2015-01-16 | 2015-05-20 | 芜湖三联锻造有限公司 | Hot-forging die for forge piece with narrow and deep rib |
| CN108160896A (en) * | 2017-12-29 | 2018-06-15 | 江苏飞船股份有限公司 | The conjunction gear precision forging die of built-in slow pressing structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010013240A1 (en) * | 1999-12-23 | 2001-08-16 | Richard Knodler | Tool cartridge having an elastic matrix |
| CN101428326A (en) * | 2008-12-08 | 2009-05-13 | 江苏太平洋精密锻造有限公司 | Automotive reverse gear intermediate gear tooth form final finishing and back taper forming mould |
| CN201618827U (en) * | 2009-12-23 | 2010-11-03 | 青岛三星精锻齿轮有限公司 | Toothed die for straight bevel gears of precision forging differential mechanism |
| CN201940522U (en) * | 2010-12-15 | 2011-08-24 | 江苏太平洋精锻科技股份有限公司 | Tooth profile and lintel corner filling structure of hot forging bottom die for automobile reverse gear |
-
2010
- 2010-12-15 CN CN 201010588592 patent/CN102151779A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010013240A1 (en) * | 1999-12-23 | 2001-08-16 | Richard Knodler | Tool cartridge having an elastic matrix |
| CN101428326A (en) * | 2008-12-08 | 2009-05-13 | 江苏太平洋精密锻造有限公司 | Automotive reverse gear intermediate gear tooth form final finishing and back taper forming mould |
| CN201618827U (en) * | 2009-12-23 | 2010-11-03 | 青岛三星精锻齿轮有限公司 | Toothed die for straight bevel gears of precision forging differential mechanism |
| CN201940522U (en) * | 2010-12-15 | 2011-08-24 | 江苏太平洋精锻科技股份有限公司 | Tooth profile and lintel corner filling structure of hot forging bottom die for automobile reverse gear |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624904A (en) * | 2015-01-16 | 2015-05-20 | 芜湖三联锻造有限公司 | Hot-forging die for forge piece with narrow and deep rib |
| CN108160896A (en) * | 2017-12-29 | 2018-06-15 | 江苏飞船股份有限公司 | The conjunction gear precision forging die of built-in slow pressing structure |
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Application publication date: 20110817 |