CN102527900B - Precision forging die of gear shaft and molding method of precision forging die - Google Patents
Precision forging die of gear shaft and molding method of precision forging die Download PDFInfo
- Publication number
- CN102527900B CN102527900B CN201210034374.6A CN201210034374A CN102527900B CN 102527900 B CN102527900 B CN 102527900B CN 201210034374 A CN201210034374 A CN 201210034374A CN 102527900 B CN102527900 B CN 102527900B
- Authority
- CN
- China
- Prior art keywords
- bar
- chuck
- forge
- precision forging
- shaping dies
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Forging (AREA)
Abstract
The invention discloses a precision forging die of a gear shaft and a molding method of precision forging die. An outer gear molding die consists of four sub dies with the same outline, wherein the inner surface of each sub die is a toothed 1/4 arc face; the side face of each sub die is a 45-degree inclined face; and the four sub dies are spliced into the outer gear molding die with teeth on the inner surface. The inner surface of each sub die of the outer gear molding die is divided into a pre-molding section and a shaping section. A core die is divided into a die-pulling section, a molding section and a fixed section, wherein the molding section is positioned on the middle part of the core die and is used for molding an involute internal spline. The gear shaft with relatively high strength and wear resistance is machined by using the precision forging die of the gear shaft, by a rotary forging method and by controlling the rotation speed of a gripping head; the diameter and the length of the gear shaft are wide in application range; the deformation resistant force born by the die is relatively small during a molding process; and the requirement on the tonnage of equipment is low.
Description
Technical field
The present invention relates to the production field of gear shaft, specifically a kind of method that adopts swaging mode to produce gear shaft.
Background technology
Gear shaft is as drive disk assembly important in plant equipment, and during work, higher contact load effect is being born at its engagement position, serious wear, and gear fatigue damage very easily under alternate load effect.Therefore, intensity and the wearability in raising meshing zone of gears territory just seem particularly important.At present, main extruding or the forging mold of utilizing of gear and gear shaft processing is from axially carrying out pressure forming.Publication number is that the innovation and creation of CN1593807, CN101025225, CN1569351 and CN1868633 mainly adopt cold-stamped mode, and by the direct Accurate Shaping spur gear of the design of gear die, its advantage is mainly manifested in the utilization rate that improves material.Publication number is the technique that the innovation and creation of CN1367051 have proposed a kind of Accurate Shaping gear, and this technique mainly adopts Warm Extrusion to improve the precision of formed gear, and advantage is that forming quality is good, but the resistance of deformation that in forming process, mould bears is relatively large.The processing method of ring gear and bevel gear has been described respectively in the innovation and creation of publication number CN1511069 and CN101031375, and the two has all adopted conventional forging process, and the former needs to improve by the grinding of coupling gear the precision of gear after forging; Latter must rely on improvement forging apparatus and mould to improve the precision of gear.Publication number is that the innovation and creation of CN1820891 adopt shunting Forging Technology to improve the forming technology of automotive reverse gear gear, by set up diffluence pass on blank or mould, has improved the poor problem of tooth top sharp corner metal fluidity.Publication number is that the innovation and creation of CN1836814 propose for thickness compared with the forming technology of pinion, by sparking electrode, along the variation of profile of tooth, processes the gear that precision is higher.By tradition, forge above or gear that fashion of extrusion processes and gear shaft show the lower and poor phenomenon of wearability of working region intensity conventionally, and also very high to the requirement of mould and equipment.Also must pass through a series of follow-up reinforcement process in actual applications, as carburizing and boronising etc., improve and become to produce cost.Comparatively speaking, publication number is the method that has proposed to adopt cold spinning process forming gear in the innovation and creation of CN101850393, the method is because of at least three rooted tooth shapes spinning roller identical with formed gear with modulus for need, and prepare by the engagement shaping of blank and spinning roller the gear that meets required precision, operation easier is larger.Publication number be the innovation and creation of CN1718305 by blank is enclosed within on external tooth form core, utilize the spinning roller at 120 °, three intervals high class gear that is shaped, its advantage shows as high rate/low cost production.Yet this gear forming method is mainly for inside engaged gear.The innovation and creation of publication number CN101332488 and CN101342566 are formed separately angular wheel shaft by traditional forward extrusion and backward extrusion technology and with the gear shaft of internal gear, yet the resistance of deformation that in forming process, mould is subject to is larger, and be treated as the length of generating gear axle and diameter has strict scope restriction.
Based on above prior art, can find out, conventional tooth wheel shaft forging method exists gear shaft intensity and the precision after being shaped lower, higher to the intensity of mould and precision in production process; Other gear forming method also Shortcomings in formed tooth wheel shaft process, can not be applied to gear shaft completely and be shaped.With above innovation and creation comparison, swaging is a kind of special-purpose production technology of producing accurate axle class part on to the spin-forging machine hitting at many tups.This technology utilization the advantage of axialy symmetric part, precision higher forging shaft gradually can be shaped by the rotation of blank.Owing to having kept well the microstructure in original blank in forming process and having formed streamline distribution, therefore, the workpiece after shaping is radially showing higher intensity and wearability, and lower to the intensity of mould and required precision in method production process.
Summary of the invention
Lower for overcoming the gear shaft intensity and the precision that exist in prior art, in production process, to the intensity of mould and the higher deficiency of precision, the present invention proposes a kind of precision forging mould and manufacturing process of gear shaft.
The precision forging mould of gear shaft of the present invention comprises axle shaping dies, external gear shaping dies and core.Described external gear shaping dies is comprised of four identical partings of profile, and the inner surface of each parting 1/4 arc surface that is dentation, and the side surface of each parting is the inclined-plane of 45 °, by four parting amalgamations, is the external gear shaping dies that inner surface has tooth.The inner surface of each parting of described external gear shaping dies is divided into preform section and plastic section two parts, and the length of parting plastic section is got 70～95% of bar regional diameter to be formed, and the length of preform section is got 40～60% of bar regional diameter to be formed., on each parting inner surface, the draft angle on tooth withdrawing pattern inclined-plane is all got 2 °.The cone angle of the preform section of described external gear shaping dies is 3.1 °.The plastic section of described external gear shaping dies is all identical with the number of teeth of gear shaft to be processed with the number of teeth of preform section.The modulus of the plastic section of described external gear shaping dies is identical with the modulus of gear shaft to be processed, and the modulus of described external gear shaping dies preform section is determined according to bar diameter ÷ (number of teeth-2.5).
Described core is divided into withdrawing pattern section, shaped segment and canned paragraph.Shaped segment is positioned at the mid portion of core, for the involute inner spline that is shaped.The number of teeth of described shaped segment outer round surface tooth is identical with the number of teeth and the modulus of gear shaft end face involute inner spline with modulus.The cone that the root circle of described core shaped segment and canned paragraph cylindrical are smooth transition, and the angle between this cone outer round surface and the center line of core is 3 °.
The method of formed tooth wheel shaft proposed by the invention, it specifically comprises the following steps:
I shaping longitudinal end.Undergauge axle shaping dies is for the first time installed on radial precision forging machine, the longitudinal end of gear shaft is carried out to undergauge for the first time.Chuck by precise forging machine is sent into bar in forging die, and by radial precision forging machine, this bar is beaten, until complete the forge length of setting.
The minor axis section of II shaping external gear end.Utilize undergauge for the first time to carry out undergauge for the first time by the minor axis section of axle shaping dies external gear wheel end.Chuck by precise forging machine is sent into bar in forging die, by radial precision forging machine, this bar is beaten, until complete the forge length of setting.
Again the be shaped minor axis section of external gear end of III is installed undergauge axle shaping dies for the second time on radial precision forging machine, and the minor axis section of the external gear end of gear shaft is carried out to undergauge for the second time.Chuck by precise forging machine is sent into bar in forging die, by radial precision forging machine, this bar is beaten, until complete the forge length of setting.Obtain the minor axis section after rough forge.
The V longitudinal end that is again shaped.By the axle shaping dies longitudinal end that is again shaped for undergauge for the second time.By chuck, bar is sent in forging die, by radial precision forging machine, this bar is beaten, until complete the forge length of setting.Obtain the longitudinal end after rough forge.
I is in the center of longitudinal end end face boring tapered blind hole.This blind hole is coaxial with bar.
II inserts core in described blind hole, coexists in heating furnace and is warming up to 920 ℃, insulation 20min with bar one.Shaping involute inner spline axle shaping dies is installed simultaneously on radial precision forging machine.Take out the bar after heating and this bar is clamped on radial precision forging machine.
During the involute inner spline of III shaping longitudinal end from this longitudinal end end face starts to forge.By chuck, bar is sent in forging die, by radial precision forging machine, this bar is beaten, until complete the forge length of setting.In forging process, the feed rate of chuck is 20mm/min, and chuck rotating speed is 13.89r/min, strike per minute 200 times.Obtain the involute inner spline of longitudinal end.
I installs finish forge axle shaping dies on radial precision forging machine.The longitudinal end of bar after rough forge is installed on radial precision forging machine.
II is from the minor axis section end face of external gear end starts to forge.By chuck, original bar is sent in forging die, by radial precision forging machine, this bar is beaten, until complete the forge length of setting.Obtain the minor axis section after finish forge.
III is from the axle rank end face of longitudinal end starts to forge.By chuck, bar is sent in forging die, by radial precision forging machine, this bar is beaten, until forged the forge length of setting.Obtain the longitudinal end after finish forge.
I is heated to 600 ℃ by the bar after axle is shaped in heating furnace, insulation 30min.
II is replaced by external gear shaping dies by axle shaping dies.This bar is installed on radial precision forging machine.
III forges external gear.By chuck, send to and rotate bar, by radial precision forging machine, this bar being beaten.In forging process, the feed rate of chuck is 2mm/min, and chuck rotating speed is 3.865r/min, strike per minute 200 times.Gear shaft after being shaped.
The present invention adopts swaging manufacturing process, by gear shaft forging mold is designed, can process the gear shaft that intensity and anti-wear performance are higher.In forging process, by controlling the rotary speed of chuck, make the gear shaft profile accuracy that processes high.Through the repeatedly hammering of external gear mould, gear shaft external gear near surface grain structure is streamline distribution, and basic identical with the shape of tooth, and the intensity of the external gear of producing, corrosion resistance and wearability are all higher.The microstructure of the inner near axis of gear shaft has retained the original toughness of bar, makes gear shaft as the used time, be not easy to rupture bearing heavy shock loads.Gear shaft diameter and axial length scope that manufacturing process in the present invention can be processed are wide, and the resistance of deformation that in forming process, mould bears is less, to equipment tonnage, require low.
Accompanying drawing explanation
The forming process schematic diagram of the minor axis section of accompanying drawing 1 long pinion shaft axle head and external gear end.
The structural representation of the precision forging mould of accompanying drawing 2 gear shafts.
The structural representation of accompanying drawing 3 partings.
The cutaway view of accompanying drawing 4 partings.
The axonometric drawing of accompanying drawing 5 external gear shaping dies.
The structural representation of accompanying drawing 6 external gear shaping dies.
The shape schematic diagram of accompanying drawing 7 embodiment mono-middle gear axles.
The structural scheme of mechanism of accompanying drawing 8 cores.
1. original bar 2. axle shaping dies 3. external gear shaping dies 4. preform section 5. plastic section 6. preform section cone angle 7. tooth 8. withdrawing pattern inclined-plane 9. involute inner spline 10. longitudinal end 11. external gear 12. minor axis section 13. withdrawing pattern section 14. shaped segment 15. canned paragraphs
The specific embodiment
Embodiment mono-
The present embodiment is a kind of precision forging mould of gear shaft, comprises axle shaping dies 2, external gear shaping dies 3 and core, is respectively used to rough forge, finish forge in gear shaft shaping, and external gear is shaped and involute inner spline is shaped.Wherein, axle shaping dies 2 adopts prior art.
As shown in Fig. 2～Fig. 5.Described external gear shaping dies 3 is comprised of four identical partings of profile, and each parting of described external gear shaping dies 3 is bulk, and the outer surface of each parting is plane, 1/4 arc surface that inner surface is dentation; The side surface of each parting is the inclined-plane of 45 °, and right angle between the side surface of two adjacent partings is coordinated.By four parting amalgamations, make the dentate gyrus cambered surface of four partings be combined into the external gear shaping dies 3 that inner surface has tooth 7.
The inner surface of each parting of described external gear shaping dies 3 is divided into preform section 4 and plastic section 5 two parts, the length of parting plastic section 4 is got 70～95% of bar 1 regional diameter to be formed, and the length of preform section 5 is got 40～60% of bar 1 regional diameter to be formed.In the present embodiment, the length of described preform section 4 and plastic section 5 is respectively 75mm and 132mm, and all there is tooth 7 on surface, and on each parting inner surface, the draft angle on tooth 7 withdrawing pattern inclined-planes 8 is all got 2 °.As shown in Figure 6.
The plastic section 5 of described external gear shaping dies is all identical with the number of teeth of gear shaft to be processed with the number of teeth of preform section 4; The modulus of plastic section 5 of described external gear shaping dies is identical with the modulus of gear shaft to be processed, the modulus of described external gear shaping dies preform section 4 is determined according to bar 1 diameter ÷ (number of teeth-2.5), in the present embodiment, the modulus of preform section 4 continuously, makes the reference diameter of these preform section 4 inner surface teeth form the conical surface between 3～3.33.
As shown in Figure 8.Described core is revolving body, along core, is axially divided into three parts: withdrawing pattern section 13, shaped segment 14 and canned paragraph 15.Wherein, withdrawing pattern section 13 is positioned at core one end, is shaped as isometrical cylinder, and its external diameter is greater than the internal diameter in gear shaft end face involute inner spline 9 holes, makes the end face of this withdrawing pattern section 13 form the locating surface coordinating with involute inner spline 9.Shaped segment 14 is positioned at the mid portion of core, for the involute inner spline 9 that is shaped.Described shaped segment outer round surface has tooth, and the number of teeth of this tooth is identical with the number of teeth and the modulus of gear shaft end face involute inner spline 9 with modulus.Canned paragraph 15 is positioned at the other end of core, and the outer round surface of this canned paragraph 15 is polished rod.
The cone that the root circle of described core shaped segment 14 and canned paragraph 15 cylindricals are smooth transition, and the angle between this cone outer round surface and the center line of core is 3 °.In the present embodiment, the tooth of shaped segment 14 outer surfaces is 18, and modulus is 2.5, and pressure angle is 30 °.The length of core withdrawing pattern section 13, shaped segment 14 and canned paragraph 15 is respectively 40mm, 48mm and 32mm.
The axle shaping dies 2 using in the present embodiment adopts prior art, and its parameter can check according to < < forging technology handbook > >.
As shown in Figure 1, the described axle shaping dies 2 for rough forge and finish forge has four, and wherein three is rough forge axle shaping dies.A undergauge for the first time for rough forge in three rough forge axle shaping dies, another is for undergauge for the second time; The 3rd the rough forge axle shaping dies involute inner spline 9 that is used for being shaped.Describedly for the shaping region internal diameter of the axle shaping dies of undergauge for the first time, be greater than the shaping region internal diameter of the axle shaping dies of undergauge for the second time.
The parameter of described three rough forge axle shaping dies 2 is respectively:
Rough forge: the shaping region diameter of the axle shaping dies that undergauge is used is for the first time 120mm, holds district diameter 165mm tightly, die length 132mm, import arc radius 41.25mm.The shaping region diameter of the axle shaping dies that undergauge is used is for the second time 100mm, holds district diameter 120mm tightly, die length 96mm, import arc radius 27mm.The shaping region diameter of rough forge axle shaping dies for the involute inner spline that is shaped is 74mm, holds district diameter 100mm tightly, die length 80mm, import arc radius 20mm.
Finish forge: the shaping region diameter for finish forge axle shaping dies is 90mm, holds district diameter 100mm tightly, die length 80mm, import arc radius 25mm.
The present embodiment has also proposed a kind of method of utilizing said gear axle precision forging die forming gear shaft.
As shown in Figure 7, the total length of the gear shaft of the present embodiment formed thereby is 501mm, one end is step major axis, the axial length 132mm of diameter 70mm wherein, the axial length 130mm of diameter 90mm, there is coaxial involute inner spline 9 at the end face center of described axle, the number of teeth 18, modulus 2.5,30 ° of pressure angles, thickness is 50mm; The other end has standard external gearing cylindrical gear and a minor axis, the number of teeth 52 of its Plays external gearing cylindrical gear, and modulus 3, thickness 172mm, the diameter of minor axis is 90mm, length is 67mm.According to gear shaft size, choose the 20CrMo rod iron of diameter 165mm, and cut from rod iron the bar 1 that length is 243mm.Adopt the double collet four tup SX32 type radial precision forging machine formed tooth wheel shafts of GFM company.
Concrete forming process comprises the following steps:
I shaping longitudinal end 10, forge length is 71mm.Before rough forge, axle shaping dies 2 for undergauge is for the first time installed on radial precision forging machine, the longitudinal end 10 of gear shaft is carried out to undergauge for the first time.Undergauge is 120mm with the internal diameter of axle shaping dies 2 plastic section for the first time.Chuck by precise forging machine navigates to the end face of described longitudinal end the end of axle shaping dies 2, between the end face of described longitudinal end and the end face of axle shaping dies 2 at a distance of 2mm.Chuck by precise forging machine is sent into bar 1 in forging die, and by radial precision forging machine, this bar is beaten, until complete the forge length of setting.
The minor axis section 12 of II shaping external gear end, forge length is 23mm.Utilize axle shaping dies 2 for undergauge for the first time, the minor axis section 12 of external gear wheel end is carried out undergauge for the first time.Chuck by precise forging machine navigates to described minor axis section end face the end of axle shaping dies 2, and between described minor axis section end face and the end face of axle shaping dies 2 at a distance of 2mm.Chuck by precise forging machine is sent into bar 1 in forging die, by radial precision forging machine, this bar is beaten, until complete the forge length of setting.
Again the be shaped minor axis section 12 of external gear end of III, forge length is 40.7mm.Axle shaping dies 2 for undergauge is for the second time installed on radial precision forging machine, the minor axis section 12 of the longitudinal end 10 of gear shaft and external gear end is carried out to undergauge for the second time; The undergauge for the second time using is 100mm with the plastic section internal diameter of axle shaping dies.Chuck by precise forging machine navigates to described minor axis section end face the end of axle shaping dies 2, and between described minor axis section end face and the end face of axle shaping dies 2 at a distance of 2mm.Chuck by precise forging machine is sent into bar 1 in forging die, by radial precision forging machine, this bar is beaten, until complete the forge length of setting.Obtain the minor axis section 12 after rough forge.
The V longitudinal end 10 that is again shaped, forge length is 131.5mm.Chuck by precise forging machine navigates to for the second time undergauge with the end of axle shaping dies 2 by the end face of described longitudinal end, between described two end faces at a distance of 2mm.By chuck, bar 1 is sent in forging die, by radial precision forging machine, this bar is beaten, until complete the forge length of setting.Obtain the longitudinal end 10 after rough forge.
I is in the center boring tapered blind hole of longitudinal end 10 end faces, and the maximum gauge of this blind hole is 50mm, degree of depth 80mm, 3 ° of the withdrawing pattern inclination angle of inclined plane of this blind hole; This blind hole is coaxial with bar 1.
II inserts core in described blind hole, coexists in heating furnace and is warming up to 920 ℃, insulation 20min with bar 1 one.The axle shaping dies 2 that plastic section internal diameter is 74mm is installed simultaneously on four tups of radial precision forging machine.Take out the bar 1 after heating and this bar is clamped on radial precision forging machine.
During the involute inner spline 9 of III shaping longitudinal end 10, from this longitudinal end end face starts to forge, forge length is 82mm.Chuck by precise forging machine navigates to the end face of described longitudinal end the end of axle shaping dies 2, between described two end faces at a distance of 2mm.By chuck, bar 1 is sent in forging die, by radial precision forging machine, this bar is beaten, until complete the forge length of setting.In forging process, the feed rate of chuck is 20mm/min, and chuck rotating speed is 13.89r/min, strike per minute 200 times.Obtain the involute inner spline 9 of longitudinal end 10.
I installs the axle shaping dies 2 that plastic section internal diameter is 90mm on four tups of radial precision forging machine.The longitudinal end of bar after rough forge 1 10 is installed on radial precision forging machine.
II is from minor axis section 12 end faces of external gear end start to forge, and forge length is 56mm.Chuck by precise forging machine navigates to described minor axis section end face the end of axle shaping dies 2, between described two end faces at a distance of 2mm.By chuck, original bar 1 is sent in forging die, by radial precision forging machine, this bar is beaten, until complete the forge length of setting.Obtain the minor axis section 12 after finish forge.
The axle rank end face that III is respectively 74mm and 100mm from longitudinal end 10 diameters starts to forge, forge length is 107mm.Chuck by precise forging machine navigates to place, described axle rank end face the end of axle shaping dies 2, between described two end faces at a distance of 2mm.By chuck, bar 1 is sent in forging die, by radial precision forging machine, this bar is beaten, until forged the forge length of setting.Obtain the longitudinal end 10 after finish forge.
I is heated to 600 ℃ by the bar after axle is shaped 1 in heating furnace, insulation 30min.
II is replaced by external gear shaping dies 3 by axle shaping dies 2.After bar 1 takes out from stove, minor axis section 12 end faces of this bar external gear end are installed on radial precision forging machine.By chuck, move bar 1, make the end face of longitudinal end 10 diameter 165mm and the axle rank end face of 90mm intersection and the preform section 4 of external gear shaping dies 3 at a distance of 2mm.
III forges external gear 11, and forge length is 153mm.By chuck, send to and rotate bar 1, by radial precision forging machine, this bar being beaten.In forging process, the feed rate of chuck is 2mm/min, and chuck rotating speed is 3.865r/min, strike per minute 200 times.Gear shaft after being shaped.
Claims (2)
1. the precision forging mould of a gear shaft, comprise axle shaping dies, external gear shaping dies and core, it is characterized in that, described external gear shaping dies is comprised of four identical partings of profile, and 1/4 arc surface that the inner surface of each parting is dentation, the side surface of each parting is the inclined-plane of 45 °, by four parting amalgamations, is the external gear shaping dies that inner surface has tooth; The inner surface of each parting of described external gear shaping dies is divided into preform section and plastic section two parts, and the length of parting plastic section is got 70～95% of bar regional diameter to be formed, and the length of preform section is got 40～60% of bar regional diameter to be formed; On each parting inner surface, the draft angle on tooth withdrawing pattern inclined-plane is all got 2 °; The cone angle of the preform section of described external gear shaping dies is 3.1 °; The plastic section of described external gear shaping dies is all identical with the number of teeth of gear shaft to be processed with the number of teeth of preform section; The modulus of the plastic section of described external gear shaping dies is identical with the modulus of gear shaft to be processed, and the modulus of described external gear shaping dies preform section is determined according to bar diameter ÷ (number of teeth-2.5);
Described core is divided into withdrawing pattern section, shaped segment and canned paragraph; Shaped segment is positioned at the mid portion of core, for the involute inner spline that is shaped; The number of teeth of described shaped segment outer round surface tooth is identical with the number of teeth and the modulus of gear shaft end face involute inner spline with modulus; The cone that the root circle of described core shaped segment and canned paragraph cylindrical are smooth transition, and the angle between this cone outer round surface and the center line of core is 3 °.
2. a method of utilizing the precision forging die forming gear shaft of gear shaft described in claim 1, is characterized in that, comprises the following steps:
Step 1, heating bar; Bar is put into heating furnace, be incubated 20min after heating furnace is warming up to 920 ℃; Bar after heating is installed on the chuck of radial precision forging machine;
Step 2, the minor axis section of the longitudinal end of rough forge gear shaft and external gear end; In rough forge process, the feed rate of chuck is 50mm/min, and the rotating speed of chuck is 13.89r/min, strike per minute 200 times; The detailed process of rough forge is:
I shaping longitudinal end; Undergauge axle shaping dies is for the first time installed on radial precision forging machine, the longitudinal end of gear shaft is carried out to undergauge for the first time; Chuck by precise forging machine is sent into bar in forging die, and by radial precision forging machine, this bar is beaten, until complete the forge length of setting;
The minor axis section of II shaping external gear end; Utilize undergauge for the first time to carry out undergauge for the first time by the minor axis section of axle shaping dies external gear wheel end; Chuck by precise forging machine is sent into bar in forging die, by radial precision forging machine, this bar is beaten, until complete the forge length of setting;
Again the be shaped minor axis section of external gear end of III is installed undergauge axle shaping dies for the second time on radial precision forging machine, and the minor axis section of the external gear end of gear shaft is carried out to undergauge for the second time; Chuck by precise forging machine is sent into bar in forging die, by radial precision forging machine, this bar is beaten, until complete the forge length of setting; Obtain the minor axis section after rough forge;
The IV longitudinal end that is again shaped; By the axle shaping dies longitudinal end that is again shaped for undergauge for the second time; By chuck, bar is sent in forging die, by radial precision forging machine, this bar is beaten, until complete the forge length of setting; Obtain the longitudinal end after rough forge;
Step 3, the involute inner spline of shaping longitudinal end; Forming process is:
I is in the center of longitudinal end end face boring tapered blind hole; This blind hole is coaxial with bar;
II is inserted core in described blind hole, coexists in heating furnace and is warming up to 920 ℃, insulation 20min with bar one; Shaping involute inner spline axle shaping dies is installed simultaneously on radial precision forging machine; Take out the bar after heating and this bar is clamped on radial precision forging machine;
During the involute inner spline of III shaping longitudinal end from this longitudinal end end face starts to forge; By chuck, bar is sent in forging die, by radial precision forging machine, this bar is beaten, until complete the forge length of setting; In forging process, the feed rate of chuck is 20mm/min, and chuck rotating speed is 13.89r/min, strike per minute 200 times; Obtain the involute inner spline of longitudinal end;
Step 4, the minor axis section of finish forge longitudinal end and external gear end; By bar air cooling to room temperature; In forging process, the feed rate of chuck is 10mm/min, and chuck rotating speed is 25r/min, strike per minute 200 times; Precision forging process is:
I is installed finish forge axle shaping dies on radial precision forging machine; The longitudinal end of bar after rough forge is installed on radial precision forging machine;
II is from the minor axis section end face of external gear end starts to forge; By chuck, original bar is entered in forging die, by radial precision forging machine, this bar is beaten, until complete the forge length of setting; Obtain the minor axis section after finish forge;
III is from the axle rank end face of longitudinal end starts to forge; By chuck, bar is sent in forging die, by radial precision forging machine, this bar is beaten, until forged the forge length of setting; Obtain the longitudinal end after finish forge;
Step 5, the external gear of precision forging gear axle; Precision forging process is:
I is heated to 600 ℃ by the bar after axle is shaped in heating furnace, insulation 30min;
II is replaced by external gear shaping dies by axle shaping dies; This bar is installed on radial precision forging machine;
III is forged external gear; By chuck, send to and rotate bar, by radial precision forging machine, this bar being beaten; In forging process, the feed rate of chuck is 2mm/min, and chuck rotating speed is 3.865r/min, strike per minute 200 times; Gear shaft after being shaped;
Step 6, machined gear shaft; By chuck, extract out after core, unload the gear shaft after shaping; Processing gear shaft on lathe, cuts unnecessary size, the chamfering between processing shaft rank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210034374.6A CN102527900B (en) | 2012-02-15 | 2012-02-15 | Precision forging die of gear shaft and molding method of precision forging die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210034374.6A CN102527900B (en) | 2012-02-15 | 2012-02-15 | Precision forging die of gear shaft and molding method of precision forging die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102527900A CN102527900A (en) | 2012-07-04 |
| CN102527900B true CN102527900B (en) | 2014-03-12 |
Family
ID=46336620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210034374.6A Expired - Fee Related CN102527900B (en) | 2012-02-15 | 2012-02-15 | Precision forging die of gear shaft and molding method of precision forging die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102527900B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103770100B (en) * | 2014-01-10 | 2015-07-08 | 西安交通大学 | Method for forming screw rod by intermittent feeding and radial forging |
| CN103861987B (en) * | 2014-03-31 | 2015-08-26 | 上海纳铁福传动系统有限公司 | Hollow shaft is swaged the method for designing of mould |
| CN104500694A (en) * | 2014-10-28 | 2015-04-08 | 浙江维大茵特起重设备有限公司 | Lever block gear |
| CN104624908B (en) * | 2014-12-23 | 2017-06-30 | 芜湖新兴铸管有限责任公司 | Diameter forging machine and forging method |
| CN106734839B (en) * | 2017-01-04 | 2018-10-23 | 上海理工大学 | A method of preventing defect occur in variable-section variable wall thickness jackshaft rotary swaging process |
| CN108006198A (en) * | 2017-12-17 | 2018-05-08 | 江苏威鹰机械有限公司 | New-energy automobile reducer gear axis and its manufacturing process |
| CN111842754B (en) * | 2020-07-08 | 2021-08-27 | 西安交通大学 | Progressive radial forging device and process for arc-shaped tooth-bottom non-involute tooth-shaped four-hammer head |
| CN112139418B (en) * | 2020-09-08 | 2021-12-10 | 西安交通大学 | Four-hammer progressive radial forging device and process for inner gear ring rigid wheel of harmonic reducer |
| CN117943502B (en) * | 2024-03-26 | 2024-05-31 | 山西重器机械制造有限公司 | Forging press for machining metal workpiece |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19705279A1 (en) * | 1997-02-12 | 1997-11-20 | Daimler Benz Ag | Gear shaft forming to give reduced cavity diameters at shaft ends |
| US5867901A (en) * | 1992-05-21 | 1999-02-09 | Nichidai Corporation | Method for producing a bevel gear shaft |
| CN1799726A (en) * | 2005-12-17 | 2006-07-12 | 江苏飞船股份有限公司 | Gear warm precision forging process method |
| CN101332488A (en) * | 2008-08-01 | 2008-12-31 | 上海东芙冷锻制造有限公司 | Cold-forging technique of gear shaft |
| CN101342566A (en) * | 2008-08-25 | 2009-01-14 | 江苏创一精锻有限公司 | Integral cold forging process for bevel gear shaft |
| CN202479422U (en) * | 2012-02-15 | 2012-10-10 | 西北工业大学 | Precisely forging and forming die of gear shaft |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006159211A (en) * | 2004-12-02 | 2006-06-22 | Toyota Motor Corp | Extrusion-forming die and extrusion-forming method |
-
2012
- 2012-02-15 CN CN201210034374.6A patent/CN102527900B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5867901A (en) * | 1992-05-21 | 1999-02-09 | Nichidai Corporation | Method for producing a bevel gear shaft |
| DE19705279A1 (en) * | 1997-02-12 | 1997-11-20 | Daimler Benz Ag | Gear shaft forming to give reduced cavity diameters at shaft ends |
| CN1799726A (en) * | 2005-12-17 | 2006-07-12 | 江苏飞船股份有限公司 | Gear warm precision forging process method |
| CN101332488A (en) * | 2008-08-01 | 2008-12-31 | 上海东芙冷锻制造有限公司 | Cold-forging technique of gear shaft |
| CN101342566A (en) * | 2008-08-25 | 2009-01-14 | 江苏创一精锻有限公司 | Integral cold forging process for bevel gear shaft |
| CN202479422U (en) * | 2012-02-15 | 2012-10-10 | 西北工业大学 | Precisely forging and forming die of gear shaft |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2006-159211A 2006.06.22 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102527900A (en) | 2012-07-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102527900B (en) | Precision forging die of gear shaft and molding method of precision forging die | |
| CN103350346B (en) | Power takeoff driving shaft cold closed-die forging plastic forming technique | |
| CN105127345B (en) | Production method of saloon car transmission combination gear ring | |
| CN104476146A (en) | Production process of automotive middle-rear axle transmission meshing sleeve | |
| CN103707017B (en) | CVT automatic gear-box V-type belt wheel axle finish forge plastic forming technique | |
| CN109048241B (en) | Method for forging input shaft of automobile gearbox and rough machining and forming blank of input shaft | |
| CN108161347B (en) | Spinning forming method for cylindrical part with annular inward reinforcing ribs | |
| CN102861861A (en) | Precision-forging plastic molding technology of bell shell of ball-cage type universal joint | |
| CN101954574A (en) | Method for machining output shaft assembly | |
| CN105179450A (en) | Production method of car transmission input axle hubs | |
| CN112846677A (en) | Vertical forging and rough and finish turning process for driving spiral bevel gear with boss | |
| CN105328414B (en) | A kind of forming method of automobile section fork | |
| CN110026751A (en) | A kind of manufacturing method of bevel planet gear oil groove | |
| CN101927309A (en) | Precision plastic forming manufacture technology of spiral bevel gear | |
| CN104959778A (en) | Constant speed universal joint end face transmission gear precision forging moulding technology | |
| CN109926533A (en) | A kind of precision plastic forming method of bevel gear | |
| CN202479423U (en) | Mould for forming external gear of gear shaft produced by precision forging | |
| CN111660073A (en) | Manufacturing method of transmission shaft | |
| CN117444106A (en) | Ring rolling tool and ring rolling forming method of spherical transition ring for pressure-resistant device | |
| CN103737271B (en) | Motor in electric automobile spindle processing technique | |
| CN101966553A (en) | Method for manufacturing rear axle driven gear of small and medium-sized automobile | |
| CN109415080A (en) | With gear rack and for producing the method with gear rack for being used for motor vehicles | |
| CN109415081A (en) | The method of the rack gear of rack gear and the transfer for producing motor vehicles | |
| CN103586642B (en) | Plate hub core manufacturing process | |
| CN202479422U (en) | Precisely forging and forming die of gear shaft |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20150215 |
|
| EXPY | Termination of patent right or utility model |