CN210412388U - Cold-temperature shaping die for gear machining - Google Patents
Cold-temperature shaping die for gear machining Download PDFInfo
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- CN210412388U CN210412388U CN201921304705.7U CN201921304705U CN210412388U CN 210412388 U CN210412388 U CN 210412388U CN 201921304705 U CN201921304705 U CN 201921304705U CN 210412388 U CN210412388 U CN 210412388U
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Abstract
The utility model discloses a cold and warm shaping die for gear processing, which comprises a female die provided with a cavity, wherein the side surface of the cavity is also provided with a tooth form, a section at the inlet side of the cavity is a conical section, and the maximum diameter point of the conical section is positioned at the end part at the inlet side of the cavity; the tooth profiles are partially positioned in the conical section and extend from the inlet side of the cavity to the bottom side of the cavity, and the tooth profiles positioned in the conical section extend towards the bottom side of the cavity along the side surface of the conical section. By adopting the die, the cold-temperature shaping processing efficiency can be improved, and the gear processing quality can be guaranteed.
Description
Technical Field
The utility model relates to a gear machining technical field especially relates to a gear machining is with cold warm plastic mould.
Background
At present, the straight toothed spur gear is mainly manufactured by a traditional metal cutting machining method or a method combining hot die forging blank forming with cutting machining, the cutting machining manufacturing method has the problems of low production efficiency, low material utilization rate, damage to the continuity of metal fibers of gear teeth and the like, and the straight toothed spur gear has the defects of poor comprehensive performance, low gear service life and the like.
As described in the technical solution provided in the utility model with application number 201811273204.7, in the prior art, a gear machining process based on forging is provided. It is generally accepted in the industry that machining gears by precision forging (finish forging) can improve material utilization, improve production efficiency, improve mechanical properties of gears, reduce cost and enhance market competitiveness. Especially has greater benefit and potential for mass production and gear precision forging in the automobile industry.
In the forging-based gear machining process, the specific process route is generally as follows: blanking → blank surface treatment → heating → blank making → hot finish forging tooth forming → heat treatment → surface treatment → cold temperature finishing → subsequent machining. The cold temperature shaping is also called cold shaping or finishing, and the shaping process is also carried out by adopting a die with a tooth form.
Further optimizing the structural design of the mold for cold and warm shaping so that it can better serve for gear machining is a technical problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
Further optimization that is used for the structural design of the mould of cold temperature plastic to above-mentioned proposition to make it can be better serve gear machining, the technical problem that the skilled person in the art awaits the solution urgently, the utility model provides a gear machining is with cold temperature plastic mould. By adopting the die, the cold-temperature shaping processing efficiency can be improved, and the gear processing quality can be guaranteed.
To the above problem, the utility model provides a pair of gear machining is with cold warm plastic mould solves the problem through following technical essential: a cold and warm shaping die for gear machining comprises a female die provided with a cavity, wherein the side surface of the cavity is also provided with a tooth form, the section on the inlet side of the cavity is a conical section, and the maximum diameter point of the conical section is positioned at the end part on the inlet side of the cavity;
the tooth profiles are partially positioned in the conical section and extend from the inlet side of the cavity to the bottom side of the cavity, and the tooth profiles positioned in the conical section extend towards the bottom side of the cavity along the side surface of the conical section.
Taking a spur gear as an example, cold finishing of the spur gear is completed by adopting a cold-warm shaping die in a pushing forming mode (cold finishing is a reducing deformation process).
In the scheme, the tooth form is used for regulating the size and the shape of the rack and the tooth groove on the gear. The section arranged on the inlet side of the cavity is a conical section, the tooth form part is positioned in the conical section and extends from the inlet side of the cavity to the bottom side of the cavity, and the tooth form positioned in the conical section extends to the bottom side of the cavity along the side surface of the conical section. Thus, the tooth profile comprises two parts: the tooth profile below the conical section can be regarded as a conventional tooth profile on the cavity, the extension direction of the tooth profile of the section is along the axial direction of the cavity and is used as a finishing working belt on the die, and the tooth surface size of the gear pre-forging part can meet the design requirement during cold finishing; the toothed portion located on the conical section, which provides an enlarged entrance for the introduction of the gear blocker into the die cavity, is located upstream of the finishing band: the inlet has a taper, the gear pre-forging piece is conveniently guided into the cavity by matching with the guiding action of the tooth form on the tapered section, and the gear pre-forging piece is ensured to be in a righting state when entering a finishing working belt by the guiding action of the tooth form on the tapered section, so that the pre-forging piece is prevented from rotating or skewing in a finishing female die, and finally the tooth form on the gear pre-forging piece is folded and damaged by pulling.
During cold finishing, firstly, the gear pre-forging piece is placed at an inlet of a cavity at the upper part of the female die, the upper die is driven by a press slide block to move downwards, and the gear pre-forging piece is pushed into the female die so as to be pushed and extruded by the cavity to obtain the gear final forging piece with a smooth surface.
The further technical scheme is as follows:
to improve the efficiency of finishing, the following settings are set: the die cavity is a through hole penetrating through the female die, and the tooth form extends to the bottom end of the die cavity from the conical section. By adopting the scheme, the gear pre-forging piece does not need to be ejected from bottom to top through the die ejection system after finishing, and can be directly ejected from the working belt,
to improve the efficiency of finishing, the following settings are set: the cavity is a through hole penetrating through the female die, and only the inlet side of the cavity is provided with a tooth shape;
the section provided with the tooth form on the cavity is a shaping section, the conical section is positioned at the front end of the shaping section, the rear end of the shaping section is a straight section, and the extension direction of the tooth form on the straight section is along the axial direction of the cavity;
the diameter of the cavity section below the shaping section is larger than or equal to the outer diameter of the straight section. The outer diameter of the straight section is the diameter of the cavity corresponding to the position of the addendum circle on the straight section. By adopting the scheme, the gear pre-forging piece does not need to be ejected from bottom to top through the die ejection system after finishing, and can be directly ejected from the working belt,
for the convenience need change the die that has different die cavities according to the gear machining of difference, set up to: the die is characterized by further comprising a stress ring, wherein the stress ring is of a block structure provided with a central hole, and the female die is detachably connected in the central hole of the stress ring.
As a more perfect technical scheme, the method is set as follows: the gear pre-forging piece pushing device further comprises an upper die used for providing pushing force for the gear pre-forging piece so that the gear pre-forging piece can be embedded into the cavity.
As a specific arrangement form of the upper die, the upper die is of a stepped shaft-shaped structure, the lower end of the stepped shaft-shaped structure is provided with a stepped surface, and the outer diameter of an upper die section at the lower end of the stepped surface is smaller than that of an upper die section at the upper end of the stepped surface. When specifically using, the last mould paragraph of step face lower extreme is used for matching the centre bore size of gear preforging piece, and the step face is used for cooperating with the up end of gear preforging piece, and preferably sets up to: the outer diameter of the step surface is smaller than or equal to the diameter of a root circle on the gear pre-forging piece, so that the upper die can provide pressure for the gear pre-forging piece, and has a positioning effect on the gear pre-forging piece.
For guaranteeing the area of contact of step face and gear preforging spare up end, set up to: the step surface is vertical to the axis of the upper die.
For the convenience need change the last mould that has different lower extreme sizes according to the gear machining of difference, set up to: still including the fixed plate that is used for fixed mould, the relation of connection of going up mould and fixed plate is for dismantling the relation of connection.
The utility model discloses following beneficial effect has:
in the scheme, the tooth form is used for regulating the size and the shape of the rack and the tooth groove on the gear. The section arranged on the inlet side of the cavity is a conical section, the tooth form part is positioned in the conical section and extends from the inlet side of the cavity to the bottom side of the cavity, and the tooth form positioned in the conical section extends to the bottom side of the cavity along the side surface of the conical section. Thus, the tooth profile comprises two parts: the tooth profile below the conical section can be regarded as a conventional tooth profile on the cavity, the extension direction of the tooth profile of the section is along the axial direction of the cavity and is used as a finishing working belt on the die, and the tooth surface size of the gear pre-forging part can meet the design requirement during cold finishing; the toothed portion located on the conical section, which provides an enlarged entrance for the introduction of the gear blocker into the die cavity, is located upstream of the finishing band: the inlet has a taper, the gear pre-forging piece is conveniently guided into the cavity by matching with the guiding action of the tooth form on the tapered section, and the gear pre-forging piece is ensured to be in a righting state when entering a finishing working belt by the guiding action of the tooth form on the tapered section, so that the pre-forging piece is prevented from rotating or skewing in a finishing female die, and finally the tooth form on the gear pre-forging piece is folded and damaged by pulling.
Drawings
Fig. 1 is a sectional view of a specific embodiment of a cold-warm shaping mold for gear machining, in which a gear pre-forging is fitted on an upper mold and the gear pre-forging is to be embedded in a cavity. The labels in the figure are respectively: 1. the device comprises a female die, 2 parts of tooth profiles, 3 parts of gear pre-forging pieces, 4 parts of conical sections, 5 parts of upper dies, 6 parts of cavities, 7 parts of stress rings, 8 parts of fixing plates.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples:
example 1:
as shown in fig. 1, a cold and warm shaping die for gear machining comprises a female die 1 provided with a cavity 6, wherein the side surface of the cavity 6 is also provided with a tooth profile 2, the section on the inlet side of the cavity 6 is a conical section 4, and the maximum diameter point of the conical section 4 is positioned at the end part on the inlet side of the cavity 6;
the tooth profiles 2 are partially located in the conical section 4 from the inlet side of the die cavity 6 to the bottom side of the die cavity 6, and the tooth profiles 2 located in the conical section 4 extend along the side surface of the conical section 4 to the bottom side of the die cavity 6.
Taking a spur gear as an example, cold finishing of the spur gear is completed by adopting a cold-warm shaping die in a pushing forming mode (cold finishing is a reducing deformation process).
In the scheme, the tooth profile 2 is used for regulating the size and the shape of the rack and the tooth groove on the gear. The section arranged as the inlet side of the cavity 6 is a conical section 4, the tooth form 2 is partially positioned in the conical section 4 from the inlet side of the cavity 6 to the bottom side of the cavity 6, and the tooth form 2 positioned in the conical section 4 extends along the side surface of the conical section 4 to the bottom side of the cavity 6. In this way, the tooth profile 2 comprises two parts: the tooth profile 2 below the conical section 4 can be regarded as a conventional tooth profile 2 on a cavity 6, the extension direction of the tooth profile 2 of the section is along the axial direction of the cavity 6 and is used as a finishing working belt on the die, and the tooth surface size of the gear pre-forging piece 3 can meet the design requirement in cold finishing; the portion of the tooth profile 2 located on the conical section 4 is located upstream of the finishing band, the conical section 4 providing an enlarged entrance for the introduction of the gear pre-forging 3 into the cavity 6: the entrance has the tapering, through the guiding action of the profile of tooth 2 on the cooperation toper section 4, not only conveniently leads into the die cavity 6 with gear preforging piece 3, simultaneously through the guiding action of the profile of tooth 2 on the toper section 4, guarantees that gear preforging piece 3 is in when getting into finishing work area and puts the state, reaches and avoids the preforging piece to take place to rotate or skew in finishing die 1, finally causes gear preforging piece 3 to go up the profile of tooth 2 and is folded and strain.
During cold finishing, the gear pre-forging piece 3 is firstly placed at an inlet of a cavity 6 at the upper part of the female die 1, the upper die 5 is driven by a press slide block to move downwards, and the gear pre-forging piece 3 is pushed into the female die 1, so that the gear final forging piece with a smooth surface is obtained through pushing of the cavity 6.
Example 2:
the present embodiment is further limited on the basis of embodiment 1, and as shown in fig. 1, in order to improve the efficiency of finishing, the following are provided: the cavity 6 is a through hole penetrating through the female die 1, and the tooth form 2 extends to the bottom end of the cavity 6 from the conical section 4. By adopting the scheme, the gear pre-forging piece 3 does not need to be ejected from bottom to top through the die ejection system after finishing, and can be directly ejected from the working belt,
to improve the efficiency of finishing, the following settings are set: the cavity 6 is a through hole penetrating through the female die 1, and only the inlet side of the cavity 6 is provided with the tooth form 2;
on the cavity 6, the section provided with the tooth profile 2 is a shaping section, the conical section 4 is positioned at the front end of the shaping section, the rear end of the shaping section is a straight section, and the extension direction of the tooth profile 2 on the straight section is along the axial direction of the cavity 6;
the diameter of the cavity section below the shaping section is larger than or equal to the outer diameter of the straight section. The outer diameter of the straight section is the diameter of the cavity 6 corresponding to the position of the addendum circle on the straight section. By adopting the scheme, the gear pre-forging piece 3 does not need to be ejected from bottom to top through the die ejection system after finishing, and can be directly ejected from the working belt,
for the convenience need change the die 1 that has different die cavities 6 according to the gear machining of difference, set up to: the die is characterized by further comprising a stress ring 7, wherein the stress ring 7 is a block-shaped structure provided with a central hole, and the female die 1 is detachably connected in the central hole of the stress ring 7.
As a more perfect technical scheme, the method is set as follows: and the upper die 5 is used for providing thrust for the gear pre-forging piece 3 so that the gear pre-forging piece 3 can be embedded into the cavity 6.
As a specific arrangement form of the upper die 5, the upper die 5 is a stepped shaft-shaped structure with a stepped surface at the lower end, and the outer diameter of the upper die 5 section at the lower end of the stepped surface is smaller than that of the upper die 5 section at the upper end of the stepped surface. When specifically using, the last mould 5 sections of step face lower extreme are used for matching the centre bore size of gear preforging piece 3, and the step face is used for cooperating with the up end of gear preforging piece 3, and preferably sets up to: the outer diameter of the step surface is smaller than or equal to the diameter of a tooth root circle on the gear pre-forging piece 3, so that the upper die 5 can provide pressure for the gear pre-forging piece 3 and has a positioning effect on the gear pre-forging piece 3.
For guaranteeing the area of contact of step face and 3 up end of gear preforging, set up to: the step surface is perpendicular to the axis of the upper die 5.
For the convenience need change the last mould 5 that has different lower extreme sizes according to the gear machining of difference, set up to: the fixing device further comprises a fixing plate 8 for fixing the upper die 5, and the upper die 5 is detachably connected with the fixing plate 8.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments thereof. To the utility model belongs to the technical field of the ordinary skilled person say, do not deviate from the utility model discloses a other embodiments that reach under the technical scheme all should be contained the utility model discloses a within the scope of protection.
Claims (8)
1. A cold and warm shaping die for gear machining comprises a female die (1) provided with a cavity (6), and the side surface of the cavity (6) is also provided with a tooth form (2), and is characterized in that a section on the inlet side of the cavity (6) is a conical section (4), and the maximum diameter point of the conical section (4) is positioned at the end part on the inlet side of the cavity (6);
the tooth profiles (2) are partially located in the conical section (4) and extend from the inlet side of the cavity (6) to the bottom side of the cavity (6), and the tooth profiles (2) located in the conical section (4) extend along the side surface of the conical section (4) to the bottom side of the cavity (6).
2. The cold and warm shaping die for gear processing according to claim 1, wherein the cavity (6) is a through hole penetrating through the female die (1), and the tooth form (2) extends from the tapered section (4) to the bottom end of the cavity (6).
3. The cold and warm shaping die for gear processing according to claim 1, wherein the cavity (6) is a through hole penetrating through the female die (1), and only the inlet side of the cavity (6) is provided with the tooth form (2);
the section provided with the tooth form (2) on the cavity (6) is a shaping section, the conical section (4) is positioned at the front end of the shaping section, the rear end of the shaping section is a straight section, and the extension direction of the tooth form (2) on the straight section is along the axial direction of the cavity (6);
the diameter of the cavity section below the shaping section is larger than or equal to the outer diameter of the straight section.
4. The cold and warm shaping die for gear machining according to claim 1, further comprising a stress ring (7), wherein the stress ring (7) is a block-shaped structure provided with a central hole, and the female die (1) is detachably connected in the central hole of the stress ring (7).
5. The cold temperature shaping die for gear processing according to claim 1, further comprising an upper die (5) for providing thrust to the gear pre-forging (3) so that the gear pre-forging (3) can be inserted into the cavity (6).
6. The cold and warm shaping die for gear processing according to claim 5, wherein the upper die (5) is of a stepped shaft-like structure with a stepped surface at the lower end, and the outer diameter of the upper die (5) segment at the lower end of the stepped surface is smaller than that of the upper die (5) segment at the upper end of the stepped surface.
7. The cold-warm truing die for gear processing as set forth in claim 6, wherein said step surface is perpendicular to the axis of the upper die (5).
8. The cold and warm shaping die for gear processing according to any one of claims 5 to 7, further comprising a fixing plate (8) for fixing the upper die (5), wherein the upper die (5) is detachably connected with the fixing plate (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921304705.7U CN210412388U (en) | 2019-08-12 | 2019-08-12 | Cold-temperature shaping die for gear machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921304705.7U CN210412388U (en) | 2019-08-12 | 2019-08-12 | Cold-temperature shaping die for gear machining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210412388U true CN210412388U (en) | 2020-04-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921304705.7U Expired - Fee Related CN210412388U (en) | 2019-08-12 | 2019-08-12 | Cold-temperature shaping die for gear machining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210412388U (en) |
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2019
- 2019-08-12 CN CN201921304705.7U patent/CN210412388U/en not_active Expired - Fee Related
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200428 Termination date: 20210812 |