CN103949575A - Gearbox main shaft vertical forging production method and special forging mold - Google Patents
Gearbox main shaft vertical forging production method and special forging mold Download PDFInfo
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- CN103949575A CN103949575A CN201410209248.9A CN201410209248A CN103949575A CN 103949575 A CN103949575 A CN 103949575A CN 201410209248 A CN201410209248 A CN 201410209248A CN 103949575 A CN103949575 A CN 103949575A
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Abstract
The invention discloses a gearbox main shaft vertical forging production method and a special forging mold. The method comprises the following steps of rod material selection; blanking; heating; blank manufacturing: forging so that the shape of the one end of a bar material becomes the shape of two sections of the upper part of an upper part step shaft of a main shaft, wherein a 1T air hammer is adopted, a swinging mold consists of an upper mold for the air hammer and a lower mold for the air hammer; forging forming: fixedly arranging a combined mold for a press machine on a 1600T electric spiral press machine, wherein through forging forming, flash can be generated on the periphery of a middle platform, and the combined mold for the press machine consists of an upper mold for the press machine and a lower mold for the press machine; edge cutting forming: forming after the generated flash is cut, wherein a combined mold for a punching machine is arranged on a 250T open type punching machine and consists of an edge cutting female mold and an edge cutting upper punching mold. The gearbox main shaft vertical forging production method and the special forging mold have the advantages that the process is simple, the steel blank working allowance is small, the material utilization rate is high, the production cost is low, and the mass production of automobile gearbox main shaft blanks with the length being 300 to 600mm is easy.
Description
Technical field
The present invention relates to a kind of improvement of automobile gearbox main shaft forging method, specifically vertical production method and the special forging mold forged of a kind of transmission main shaft, is applicable to processing length and is the automobile gearbox main shaft blank of 300-600 millimeters.
Background technology
Length is that the shape of automobile gearbox main shaft of 300-600 millimeters is as Fig. 1, main shaft 1 is by upper step axle 2, middle deck 3 and bottom inversed taper platform 4 form, upper step axle 2 is made up of four pitch cone platforms, the upper end diameter of bottom inversed taper platform 4 is large, lower end diameter is little, utilize at present Forging Technology to produce this automobile gearbox main shaft, main employing open die forging or flat forging, in the time choosing bar, that the bar of choosing same diameter according to the maximum gauge of middle deck 3 is processed, its weak point is: because main shaft is longer, structural strength and technical requirement are higher, common forging molding difficulty, open die forging or flat forging process used at present, manufacturing process is loaded down with trivial details, and steel billet allowance is large, and stock utilization is low, processing precision of products is difficult to control, yield rate is low, and production cost is high, is not easy to batch production, the anti-wear performance of material is poor, product operation noise is large, and product is short service life, has affected the overall performance of gearbox.
Summary of the invention
One object of the present invention is to provide a kind of technique simple, and steel billet allowance is little, and stock utilization is high, and production cost is low, is easy to produce in batches the vertical production method of forging of transmission main shaft that length is the automobile gearbox main shaft blank of 300-600 millimeters.
In order to reach above object, the technical solution adopted in the present invention is: the vertical production method of forging of this transmission main shaft, is characterized in that: it comprises the following steps makes:
(1), choose bar: the bar of selecting same diameter according to the diameter of the inversed taper platform lower end, bottom of main shaft;
(2), blanking: adopt computerized numerical control sawing machine processing, the blank weight × 1.015 ÷ bar density ÷ bar sectional area that cutting length is main shaft;
(3), heating: adopt middle frequency furnace, DC current 1000A, DC voltage 400V, voltage of intermediate frequency 400-600V, heat time 40-50s;
(4), base: adopt 1T pneumatic hammer, getting rid of pattern is made up of pneumatic hammer patrix and pneumatic hammer counterdie, the shape that pneumatic hammer saves with the upper groove of patrix bottom and the shape of low groove on pneumatic hammer counterdie top and the top two of upper step axle is suitable, pneumatic hammer is arranged on respectively on the upper and lower tup of pneumatic hammer with patrix and pneumatic hammer counterdie, one end of bar after heating is placed on to pneumatic hammer patrix and pneumatic hammer with forging between counterdie, the shape that the top two that makes the shape of bar one end become the upper step axle of main shaft is saved;
(5), forge moulding: adopt 1600T electric screw press, 280-300 revs/min of rotating speeds, hitting power 700-1000T, press is fixed on electric screw press with combination die, the bar of making through step (4) is on end put into combination die for press, and bar is not placed down through one end of processing, through forging moulding, now, the periphery of middle deck can produce overlap, described press combination die, formed with patrix and press counterdie by press, press is provided with upper step axle die cavity with the middle part of patrix, middle deck upper impression and overlap die cavity, press is provided with bottom inversed taper platform die cavity and middle deck lower impressions with the middle part of counterdie, press inserts in overlap die cavity with the upper end of counterdie, counterdie backing plate and counterdie trim ring are set in the outside of press counterdie and are also connected and fixed with the workbench of bolt and electric screw press, upper die plate and patrix trim ring are set in the outside of press patrix and are also connected and fixed with the top pressure head of bolt and electric screw press,
(6), trimming sizing: adopt 250T open type punch press, punch press is provided with punch press combination die, described punch press combination die, formed by trim die and trimming upper trimming die, trim die backing plate is set in trim die outside, and be placed on the workbench of punch press, insert in the through hole at trim die middle part the main shaft lower end with overlap after step (5) processing, again at the sheathed trimming upper trimming die in the top of main shaft, press down trimming upper trimming die with the low punch of punch press and can cut the overlap producing while forging, thereby main shaft is finally shaped.
Another object of the present invention is to provide easily assembling of one, and simple to operate, labour intensity is low, and being convenient to processing length is the vertical special forging mold of production of forging of transmission main shaft of the automobile gearbox main shaft blank of 300-600 millimeters.
In order to reach above object, the technical solution adopted in the present invention is: the vertical forging of this transmission main shaft produced special forging mold, it is characterized in that: it comprises that pneumatic hammer is with getting rid of pattern, press combination die and punch press combination die;
Described pneumatic hammer is with getting rid of pattern, formed with patrix and pneumatic hammer counterdie by pneumatic hammer, pneumatic hammer is provided with upper groove with the bottom of patrix, pneumatic hammer is provided with low groove with the top of counterdie, low groove and upper groove symmetry, the shape that the top two of the shape of low groove and upper groove and upper step axle is saved is suitable;
Described press combination die, formed with patrix and press counterdie by press, press is positioned in same vertical axis with patrix and press counterdie, press is provided with upper step axle die cavity with the middle part of patrix, middle deck upper impression and overlap die cavity, press is provided with bottom inversed taper platform die cavity and middle deck lower impressions with the middle part of counterdie, press is provided with material returned hole with the bottom of counterdie, middle deck upper impression is identical with the diameter of middle deck lower impressions, the degree of depth sum of middle deck upper impression and middle deck lower impressions is identical with the thickness of middle deck, press is identical with the internal diameter of overlap die cavity with the outer diameter of the upper end of counterdie,
Described punch press combination die, formed by trim die and trimming upper trimming die, the middle part of trim die is provided with through hole, the internal diameter of through hole upper end is identical with the external diameter of the middle deck of main shaft, trimming upper trimming die is positioned at the top of the trim die of same axis, the external diameter of trimming upper trimming die is less than the internal diameter of through hole upper end, and the middle part of trimming upper trimming die is provided with the cavity suitable with the shape of the upper step axle of main shaft.
Beneficial effect of the present invention is: compared with traditional open die forging or flat method of forging processing transmission main shaft blank, technique of the present invention is simple, and steel billet allowance is little, and stock utilization is high, production cost is low, is easy to produce in batches length and is the automobile gearbox main shaft blank of 300-600 millimeters.
Brief description of the drawings
Fig. 1 is that the structure master of automobile gearbox main shaft looks schematic diagram.
Fig. 2 is that pneumatic hammer of the present invention is looked schematic diagram with the structure master who gets rid of pattern.
Fig. 3 is the structure cross-sectional schematic of the present invention along Fig. 2 A-A.
Fig. 4 is the structure cross-sectional schematic of press of the present invention combination die.
Fig. 5 is the structure cross-sectional schematic of punch press of the present invention combination die.
In figure: 1, main shaft; 2, upper step axle; 3, middle deck; 4, bottom inversed taper platform; 5, overlap; 6, pneumatic hammer patrix; 7, pneumatic hammer counterdie; 8, upper groove; 9, low groove; 10, press patrix; 11, press counterdie; 12, upper step axle die cavity; 13, bottom inversed taper platform die cavity; 14, upper die plate; 15, counterdie backing plate; 16, counterdie trim ring; 17, patrix trim ring; 18, middle deck upper impression; 19, middle deck lower impressions; 20, overlap die cavity; 21, material returned hole; 22, trimming upper trimming die; 23, trim die; 24, trim die backing plate; 25, through hole.
Detailed description of the invention
Embodiment 1:
Make 05804 automobile gearbox main shaft blank as shown in Figure 1.Vertical production method and the special forging mold forged of this transmission main shaft, is characterized in that: it comprises the following steps makes:
(1), choose bar: the bar of selecting same diameter according to the diameter of bottom inversed taper platform 4 lower ends of main shaft 1; 05804 main shaft total length is 548mm, and wherein φ 95 diameter lengths are 332.2mm, and the diameter of bottom inversed taper platform 4 lower ends is φ 95, is the 22CrMoH bar of φ 95 so select diameter.
(2), blanking: adopt computerized numerical control sawing machine processing, sawing machine model GZ4232, cutting length is calculated as follows: 30.74 × 1.015=31.2kg; 31200g ÷ 0.00785g/mm
3÷ 7084.63mm
2=561.01mm, gets cutting length 561 mm.
(3), heating: adopt middle frequency furnace, specification KGPS-800KW/1000Hz, primary voltage 380V, DC current 1000A, DC voltage 400V, voltage of intermediate frequency 400-600V, heat time 40-50s.
(4), base: adopt 1T pneumatic hammer, getting rid of pattern is made up of pneumatic hammer patrix 6 and pneumatic hammer counterdie 7, pneumatic hammer is provided with upper groove 8 with the bottom of patrix 6, pneumatic hammer is provided with low groove 9 with the top of counterdie 7, low groove 9 and upper groove 8 symmetries, the shape that the top two of the shape of low groove 9 and upper groove 8 and upper step axle 2 is saved is suitable, pneumatic hammer is arranged on respectively the upper of pneumatic hammer with patrix 6 and pneumatic hammer counterdie 7, on lower ram, one end of bar after heating is placed between pneumatic hammer patrix 6 and pneumatic hammer counterdie 7 and is forged, the shape that the top two that makes the shape of bar one end become the upper step axle 2 of main shaft 1 is saved.
(5), forge moulding: adopt 1600T electric screw press, 280-300 revs/min of rotating speeds, hitting power 700-1000T, press is fixed on electric screw press with combination die, the bar of making through step (4) is on end put into combination die for press, and bar is not placed down through one end of processing, through forging moulding, now, the periphery of middle deck 3 can produce overlap 5, described press combination die, formed with patrix 10 and press counterdie 11 by press, press is positioned in same vertical axis with patrix 10 and press counterdie 11, press is provided with upper step axle die cavity 12 with the middle part of patrix 10, middle deck upper impression 18 and overlap die cavity 20, press is provided with bottom inversed taper platform die cavity 13 and middle deck lower impressions 19 with the middle part of counterdie 11, press is provided with material returned hole 21 with the bottom of counterdie 11, middle deck upper impression 18 is identical with the diameter of middle deck lower impressions 19, the degree of depth sum of middle deck upper impression 18 and middle deck lower impressions 19 is identical with the thickness of middle deck 3, press is identical with the internal diameter of overlap die cavity 20 with the outer diameter of the upper end of counterdie 11, so that press can insert in overlap die cavity 20 with the upper end of counterdie 11, counterdie backing plate 15 and counterdie trim ring 16 are set in the outside of press counterdie 11 and are also connected and fixed with the workbench of bolt and electric screw press, upper die plate 14 and patrix trim ring 17 are set in the outside of press patrix 10 and are also connected and fixed with the top pressure head of bolt and electric screw press.
(6), trimming sizing: adopt 250T open type punch press, punch press is provided with punch press combination die, the main shaft 1 with overlap 5 after step (5) processing is put into combination die for punch press, presses down and can cut overlap 5, thereby main shaft 1 is finally shaped with the low punch of punch press, described punch press combination die, formed by trim die 23 and trimming upper trimming die 22, the middle part of trim die 23 is provided with through hole 25, the internal diameter of through hole 25 upper ends is identical with the external diameter of the middle deck 3 of main shaft 1, trimming upper trimming die 22 is positioned at the top of the trim die 23 of same axis, the external diameter of trimming upper trimming die 22 is less than the internal diameter of through hole 25 upper ends, the middle part of trimming upper trimming die 22 is provided with the cavity suitable with the shape of the upper step axle 2 of main shaft 1, trim die backing plate 24 is set in trim die 23 outsides, and be placed on the workbench of punch press, for excising the overlap producing while forging.
The advantage of the present invention's vertical forging method used is, because the bar size of selecting is close to the longest size of product, in the time forging, need the less strength just can moulding, and overlap be less, good product consistency, physical property is better than cross wedge rolling axle, even density, operation is few, and stock utilization is high, the overlap forming in the time forging is fervent with punch press, has greatly improved production efficiency.
Embodiment 2:
Make 05803 automobile gearbox main shaft blank as shown in Figure 1.Vertical production method and the special forging mold forged of this transmission main shaft, is characterized in that: it comprises the following steps makes:
(1), choose bar: the bar of selecting same diameter according to the diameter of bottom inversed taper platform 4 lower ends of main shaft 1; 05803 main shaft total length is 498.5mm, and wherein φ 95 diameter lengths are 258.5mm, and the diameter of bottom inversed taper platform 4 lower ends is φ 95, is the 22CrMoH bar of φ 95 so select diameter.
(2), blanking: adopt computerized numerical control sawing machine processing, sawing machine model GZ4232, cutting length is calculated as follows: 27.39 × 1.015=27.8kg; 27800g ÷ 0.00785g/mm
3÷ 7084.63mm
2=499.87mm, gets cutting length 499.9 mm.
(3), heating: adopt middle frequency furnace, specification KGPS-800KW/1000Hz, primary voltage 380V, DC current 1000A, DC voltage 400V, voltage of intermediate frequency 400-600V, heat time 40-50s.
(4), base: adopt 1T pneumatic hammer, getting rid of pattern is made up of pneumatic hammer patrix 6 and pneumatic hammer counterdie 7, pneumatic hammer is provided with upper groove 8 with the bottom of patrix 6, pneumatic hammer is provided with low groove 9 with the top of counterdie 7, low groove 9 and upper groove 8 symmetries, the shape that the top two of the shape of low groove 9 and upper groove 8 and upper step axle 2 is saved is suitable, pneumatic hammer is arranged on respectively the upper of pneumatic hammer with patrix 6 and pneumatic hammer counterdie 7, on lower ram, one end of bar after heating is placed between pneumatic hammer patrix 6 and pneumatic hammer counterdie 7 and is forged, the shape that the top two that makes the shape of bar one end become the upper step axle 2 of main shaft 1 is saved.
(5), forge moulding: adopt 1600T electric screw press, 280-300 revs/min of rotating speeds, hitting power 700-1000T, press is fixed on electric screw press with combination die, the bar of making through step (4) is on end put into combination die for press, and bar is not placed down through one end of processing, through forging moulding, now, the periphery of middle deck 3 can produce overlap 5, described press combination die, formed with patrix 10 and press counterdie 11 by press, press is positioned in same vertical axis with patrix 10 and press counterdie 11, press is provided with upper step axle die cavity 12 with the middle part of patrix 10, middle deck upper impression 18 and overlap die cavity 20, press is provided with bottom inversed taper platform die cavity 13 and middle deck lower impressions 19 with the middle part of counterdie 11, press is provided with material returned hole 21 with the bottom of counterdie 11, middle deck upper impression 18 is identical with the diameter of middle deck lower impressions 19, the degree of depth sum of middle deck upper impression 18 and middle deck lower impressions 19 is identical with the thickness of middle deck 3, press is identical with the internal diameter of overlap die cavity 20 with the outer diameter of the upper end of counterdie 11, so that press can insert in overlap die cavity 20 with the upper end of counterdie 11, counterdie backing plate 15 and counterdie trim ring 16 are set in the outside of press counterdie 11 and are also connected and fixed with the workbench of bolt and electric screw press, upper die plate 14 and patrix trim ring 17 are set in the outside of press patrix 10 and are also connected and fixed with the top pressure head of bolt and electric screw press.
(6), trimming sizing: adopt 250T open type punch press, punch press is provided with punch press combination die, the main shaft 1 with overlap 5 after step (5) processing is put into combination die for punch press, presses down and can cut overlap 5, thereby main shaft 1 is finally shaped with the low punch of punch press, described punch press combination die, formed by trim die 23 and trimming upper trimming die 22, the middle part of trim die 23 is provided with through hole 25, the internal diameter of through hole 25 upper ends is identical with the external diameter of the middle deck 3 of main shaft 1, trimming upper trimming die 22 is positioned at the top of the trim die 23 of same axis, the external diameter of trimming upper trimming die 22 is less than the internal diameter of through hole 25 upper ends, the middle part of trimming upper trimming die 22 is provided with the cavity suitable with the shape of the upper step axle 2 of main shaft 1, trim die backing plate 24 is set in trim die 23 outsides, and be placed on the workbench of punch press, for excising the overlap producing while forging.
Claims (2)
1. the vertical production method of forging of transmission main shaft, is characterized in that: it comprises the following steps makes:
(1), choose bar: the bar of selecting same diameter according to the diameter of bottom inversed taper platform (4) lower end of main shaft (1);
(2), blanking: adopt computerized numerical control sawing machine processing, cutting length is the blank weight × 1.015 ÷ bar density ÷ bar sectional area of main shaft (1);
(3), heating: adopt middle frequency furnace, DC current 1000A, DC voltage 400V, voltage of intermediate frequency 400-600V, heat time 40-50s;
(4), base: adopt 1T pneumatic hammer, get rid of pattern by patrix for pneumatic hammer (6) and for pneumatic hammer counterdie (7) form, the upper groove (8) of patrix for pneumatic hammer (6) bottom and the shape that for pneumatic hammer, the shape of the low groove (9) on counterdie (7) top and the top two of upper step axle (2) are saved are suitable, patrix for pneumatic hammer (6) and for pneumatic hammer counterdie (7) be arranged on respectively the upper of pneumatic hammer, on lower ram, one end of bar after heating is placed on to patrix for pneumatic hammer (6) and between counterdie (7), forges for pneumatic hammer, the shape that the top two that makes the shape of bar one end become the upper step axle (2) of main shaft (1) is saved,
(5), forge moulding: adopt 1600T electric screw press, 280-300 revs/min of rotating speeds, hitting power 700-1000T, press is fixed on electric screw press with combination die, the bar of making through step (four) is on end put into combination die for press, and bar is not placed down through one end of processing, through forging moulding, now, the periphery of middle deck (3) can produce overlap (5), described press combination die, by patrix for press (10) and for press counterdie (11) form, the middle part of patrix for press (10) is provided with upper step axle die cavity (12), middle deck upper impression (18) and overlap die cavity (20), the middle part of counterdie for press (11) is provided with bottom inversed taper platform die cavity (13) and middle deck lower impressions (19), insert in overlap die cavity (20) upper end of counterdie for press (11), counterdie backing plate (15) and counterdie trim ring (16) are set in the outside of counterdie for press (11) and are also connected and fixed with the workbench of bolt and electric screw press, upper die plate (14) and patrix trim ring (17) are set in the outside of patrix for press (10) and are also connected and fixed with the top pressure head of bolt and electric screw press,
(6), trimming sizing: adopt 250T open type punch press, punch press is provided with punch press combination die, described punch press combination die, formed by trim die (23) and trimming upper trimming die (22), trim die backing plate (24) is set in trim die (23) outside, and be placed on the workbench of punch press, insert in the through hole (25) at trim die (23) middle part the main shaft with overlap (5) (1) lower end after step (five) processing, again at the sheathed trimming upper trimming die in top (22) of main shaft (1), press down trimming upper trimming die (22) with the low punch of punch press and can cut the overlap (5) producing while forging, thereby main shaft (1) is finally shaped.
2. vertical forging of transmission main shaft produced special forging mold, it is characterized in that: it comprises that pneumatic hammer is with getting rid of pattern, press combination die and punch press combination die;
Described pneumatic hammer is with getting rid of pattern, by patrix for pneumatic hammer (6) and for pneumatic hammer counterdie (7) form, the bottom of patrix for pneumatic hammer (6) is provided with upper groove (8), the top of counterdie for pneumatic hammer (7) is provided with low groove (9), low groove (9) and upper groove (8) symmetry, the shape that the shape of low groove (9) and upper groove (8) and the top two of upper step axle (2) are saved is suitable;
Described press combination die, by patrix for press (10) and for press counterdie (11) form, patrix for press (10) and for press counterdie (11) be positioned in same vertical axis, the middle part of patrix for press (10) is provided with upper step axle die cavity (12), middle deck upper impression (18) and overlap die cavity (20), the middle part of counterdie for press (11) is provided with bottom inversed taper platform die cavity (13) and middle deck lower impressions (19), the bottom of counterdie for press (11) is provided with material returned hole (21), middle deck upper impression (18) is identical with the diameter of middle deck lower impressions (19), the degree of depth sum of middle deck upper impression (18) and middle deck lower impressions (19) is identical with the thickness of middle deck (3), the outer diameter of the upper end of counterdie for press (11) is identical with the internal diameter of overlap die cavity (20),
Described punch press combination die, formed by trim die (23) and trimming upper trimming die (22), the middle part of trim die (23) is provided with through hole (25), the internal diameter of through hole (25) upper end is identical with the external diameter of the middle deck (3) of main shaft (1), trimming upper trimming die (22) is positioned at the top of the trim die (23) of same axis, the external diameter of trimming upper trimming die (22) is less than the internal diameter of through hole (25) upper end, and the middle part of trimming upper trimming die (22) is provided with the cavity suitable with the shape of the upper step axle (2) of main shaft (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209248.9A CN103949575B (en) | 2014-05-19 | 2014-05-19 | Transmission main shaft vertical forging production method and special forging mold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209248.9A CN103949575B (en) | 2014-05-19 | 2014-05-19 | Transmission main shaft vertical forging production method and special forging mold |
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| CN103949575A true CN103949575A (en) | 2014-07-30 |
| CN103949575B CN103949575B (en) | 2015-12-09 |
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|---|---|---|---|
| CN201410209248.9A Expired - Fee Related CN103949575B (en) | 2014-05-19 | 2014-05-19 | Transmission main shaft vertical forging production method and special forging mold |
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| CN109702130A (en) * | 2017-10-26 | 2019-05-03 | 加特可株式会社 | Model is used in forging |
| CN112872710A (en) * | 2021-03-23 | 2021-06-01 | 中铁工程装备集团有限公司 | Mold for repairing mechanical parts and application method thereof |
| WO2021243734A1 (en) * | 2020-06-05 | 2021-12-09 | 浙江嘉杰汽车设计有限公司 | Gearbox shaft forging processing device and processing method therefor |
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| CN109702130A (en) * | 2017-10-26 | 2019-05-03 | 加特可株式会社 | Model is used in forging |
| CN109702130B (en) * | 2017-10-26 | 2021-06-15 | 加特可株式会社 | Forging mold |
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| CN112872710A (en) * | 2021-03-23 | 2021-06-01 | 中铁工程装备集团有限公司 | Mold for repairing mechanical parts and application method thereof |
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| Publication number | Publication date |
|---|---|
| CN103949575B (en) | 2015-12-09 |
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