CN102941308A - Thermal-forging forming production method for cam blank of cam shaft of automobile engine - Google Patents
Thermal-forging forming production method for cam blank of cam shaft of automobile engine Download PDFInfo
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- CN102941308A CN102941308A CN2012104649515A CN201210464951A CN102941308A CN 102941308 A CN102941308 A CN 102941308A CN 2012104649515 A CN2012104649515 A CN 2012104649515A CN 201210464951 A CN201210464951 A CN 201210464951A CN 102941308 A CN102941308 A CN 102941308A
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Abstract
The invention relates to a thermal-forging forming production method for a cam blank of a cam shaft of an automobile engine, comprising the following steps of: cutting station of a multi-station thermal-forging machine: heating a material with specified diameter to a certain temperature between 300-900 DEG C by secondary medium-high frequency heating between a cutting mold and a feeding wheel, then conveying the material to the cutting mold and cutting the material into a middle workpiece A with the length meeting the requirement; conveying the middle workpiece A to shaping molds on five stations, processing the middle workpiece A, impressing a recognition identifier on one plane of the processed workpiece, finally conveying the middle workpiece into a mold on a sixth station, using a punching rod to carry out leveling and preparing a finished product. The thermal-forging forming production method has the advantages that the heating temperature of the material can be controlled to be 300-900 DEG C, the internal organization structure of the material is not changed, and the subsequent heat treatment processing is simple; and the smoothness of the surface of the appearance is greatly improved and the size accuracy is ensured.
Description
Technical field
The present invention relates to a kind of production method of camshaft of car engine, relate in particular to a kind of temperature requirement and be controlled at the 300-900 Celsius temperature, the camshaft of car engine cam blank temperature upsetting forming production process that raw-material institutional framework does not change.
Background technology
At present, camshaft of car engine was developed to combined type by former monoblock type, and its advantage is Cost reduction, and weight reduction is easy to large batch of production, but present cam blank all is bearing steels, produces with the multistation hot forging process.Material temperature requires to be heated to more than 1150 degrees centigrade.So not only energy resource consumption is large, easily decarburization, and the raw material tissue changes, and the highly difficult large cost high efficiency of follow-up heat treatment requirements is low.
Summary of the invention
For the problems referred to above, main purpose of the present invention is to provide a kind of temperature requirement to be controlled at the 300-900 Celsius temperature, the camshaft of car engine cam blank temperature upsetting forming production process that raw-material institutional framework does not change.
The present invention solves above-mentioned technical problem by following technical proposals: a kind of camshaft of car engine cam blank temperature upsetting forming production process, described method comprises the steps:
(1), the cut-out station of multiplex's megadyne temperature upsetting machine: cutting off between mould and the drawing-inroller, pass through in the secondary or high-frequency heating, the material of specified diameter is heated to a certain temperature between 300-900 ℃, deliver to the blank mould again and be cut to the satisfactory intermediate piece A of length, intermediate piece A presents cylindric;
(2), the intermediate piece A that is processed in the step (1) is delivered to the mould that is positioned at the first station, middle workpiece A one end upsetting pressure is become chamfering and the first center moulding locating hole, other end punching press the second center moulding locating hole, making an end has the chamfering two ends that the intermediate piece B of center positioning hole is arranged;
(3), the intermediate piece B that is processed in the step (2) is delivered to the shaping mold that is positioned on the second station, upsetting becomes the U-shaped cam of an end, the intermediate piece C of a chamfer to middle workpiece B temperature;
(4), the intermediate piece C that is processed in the step (3) is delivered to the mould that is positioned at the 3rd station carry out warm upsetting squeeze and press that to make it external form full, there is the intermediate piece D of concave station at circle center, both sides;
(5), the intermediate piece D that is processed in the step (4) is delivered to the 4th station mould, push inward with the circle of punching rod with the centre, the material of compressing into is extruded into die formation one end falls in the intermediate piece E that an end protrudes;
(6), the intermediate piece E that is processed in the step (5) is delivered to the mould of the 5th station, with the punching rod middle waste material is thrust and make intermediate piece F;
(7), the intermediate piece F that is processed in the step (6) is delivered in the mould of the 6th station, flatten with the punching rod and make finished product G;
A plane at intermediate piece E or intermediate piece F in described step (6) or the step (7) presses identification marking, and described identification marking is one or more points.
In specific embodiments of the invention, the length of the intermediate piece A in the described step (1) is 24.5mm.
In specific embodiments of the invention, chamfering in the described step (2) is chamfering R10, the specification of the first center moulding locating hole in the described step (2) is Φ 5*150 °, and the specification of the second center moulding locating hole in the described step (2) is Φ 5*150 °.
In specific embodiments of the invention, U-shaped cam is that a chamfer is 20 ± 3 ° in the described step (3), and circular diameter is Φ 32mm, and cam direction total height is 36mm, and thickness is the intermediate piece C of 10.9mm.
In specific embodiments of the invention, described step (4) specifically comprises the steps: intermediate piece C is delivered to the mould that is positioned at the 3rd station, carrying out warm upsetting squeeze presses and makes it circular diameter and reach Φ 32.4mm, cam direction total height is 37.8mm, and thickness is that the 10.7mm two ends fall in that step is respectively Φ 23*1, Φ 23*0.5 makes intermediate piece D.
In specific embodiments of the invention, described step (5) is delivered to the mould that is positioned at the 4th station with intermediate piece D, carries out warm upsetting squeeze pressure a round end endoporus is rushed in, and the other end protrudes makes intermediate piece E.
In specific embodiments of the invention, described step (5) is delivered to intermediate piece D the mould that is positioned at the 4th station, carrying out warm upsetting squeeze pressure makes diameter of a circle reach Φ 33.2mm, cam limit total height is 38.4mm, thickness is 10.7mm, it is Φ 22.9*5 that one end endoporus is rushed in step, and the other end protrudes Φ 15*9 and makes intermediate piece E.
In specific embodiments of the invention, described step is delivered to the mould that is positioned at the 5th station with intermediate piece E in (6), with the punching rod middle waste material is cut off, making it to make endoporus is Φ 22.7mm through hole, and press sign at a face, circular diameter is Φ 33.2mm, and cam direction total height is 38.40mm, and thickness is the intermediate piece F of 10.7mm.
In specific embodiments of the invention, in the described step (7) intermediate piece F is delivered in the mould of the 6th station, flatten with the punching rod that to make diameter be that Φ 33.25mm cam direction total height is 38.45mm, thickness is 10.65mm, and endoporus is the finished product G of Φ 22.7mm.
Positive progressive effect of the present invention is: the present invention compares with existing similar technique, and have following advantage: material heating-up temperature of the present invention can be controlled in 300-900 ℃, has saved the energy; Yin Wendu of the present invention is below 900 ℃, and the internal organizational structure of material does not change, and subsequent heat treatment processing is simple; Appearance surfaces fineness improves greatly, and dimensional accuracy is guaranteed; The product that the present invention produces with warm upsetting moulding process uses through reality, and it is high a lot of that efficient and quality technique is before wanted, and society and economic benefit are obvious.
Description of drawings
Fig. 1 is the structural representation of the intermediate piece A of the warm upsetting moulding process production of invention;
Fig. 2 is the structural representation of the intermediate piece B of the warm upsetting moulding process production of invention;
Fig. 3-1 is the structural representation of the one side of the intermediate piece C of the warm upsetting moulding process production of invention;
Fig. 3-2 is the structural representation of the another side of the intermediate piece C of the warm upsetting moulding process production of invention;
Fig. 3-3 is the C-C cutaway view of Fig. 3-2;
Fig. 4-1 is the structural representation of the intermediate piece D of the warm upsetting moulding process production of invention;
Fig. 4-2 is the D-D cutaway view of Fig. 4-1;
Fig. 5-1 is the structural representation of the intermediate piece E of the warm upsetting moulding process production of invention;
Fig. 5-2 is the E-E cutaway view of Fig. 5-1;
Fig. 6-1 is the structural representation of the intermediate piece F of the warm upsetting moulding process production of invention;
Fig. 6-2 is the F-F cutaway view of Fig. 6-1;
The finished product structure schematic diagram that Fig. 7 produces for the warm upsetting moulding process of invention.
The specific embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technical scheme of the present invention in detail.
Fig. 1 is the structural representation of the intermediate piece A of the warm upsetting moulding process production of invention, be illustrated in figure 1 as a cylindric cylinder, the concrete cut-out station that adopts multiplex's megadyne temperature upsetting machine, cutting off between mould and the drawing-inroller, pass through in the secondary or high-frequency heating, the material that intermediate piece A is adopted is heated to a certain temperature between 300-900 ℃, in the present invention, specifically can select 400 ℃, 500 ℃, 600 ℃, 700 ℃ of any one temperature between waiting 300-900 ℃, deliver to the blank mould again and be cut to the satisfactory intermediate piece A of length, intermediate piece A presents cylindric; In the present invention, the length of intermediate piece A is processed into 24.5mm.
Fig. 2 is the structural representation of the intermediate piece B of the warm upsetting moulding process production of invention; The concrete procedure of processing of intermediate piece B is: the intermediate piece A that is processed in the step (1) is delivered to the mould that is positioned at the first station, middle workpiece A one end upsetting pressure is become moulding heart locating hole 101 in chamfering and first, other end punching press the second moulding center positioning hole 102, making an end has chamfering 103 two ends that the intermediate piece B of center positioning hole (being respectively moulding heart locating hole 101 and the second moulding center positioning hole 102 in first) is arranged; In Fig. 2, chamfering 103 is positioned at that end of the second moulding center positioning hole 102.
In specific implementation process of the present invention, chamfering 103 is elected chamfering R10 as, and the specification of the first center moulding locating hole 101 is Φ 5*150 °, and the specification of the second center moulding locating hole 102 is Φ 5*150 °.
In specific implementation process of the present invention, the specification of the first center moulding locating hole 101 and the second center moulding locating hole 102 also can be set as diameter and the angle of wanting arbitrarily, and the energy positioning instant can.
Fig. 3-1 is the structural representation of the one side of the intermediate piece C of the warm upsetting moulding process production of invention; Fig. 3-2 is the structural representation of the another side of the intermediate piece C of the warm upsetting moulding process production of invention; Fig. 3-3 is the C-C cutaway view of Fig. 3-2;
The intermediate piece B that is processed into is delivered to the shaping mold that is positioned on the second station, and upsetting becomes the intermediate piece C of the U-shaped cam of an end 201, one chamfers 202 to middle workpiece B temperature; Above-mentioned U-shaped cam is that a chamfer is 20 ± 3 °, and circular diameter is Φ 32mm, and cam direction total height is 36mm, and thickness is the intermediate piece C of 10.9mm.The one side of intermediate piece C comprises chamfering 202, and another side does not comprise chamfering, only is to comprise center positioning hole 102.
Fig. 4-1 is the structural representation of the intermediate piece D of the warm upsetting moulding process production of invention; Fig. 4-2 is the D-D cutaway view of Fig. 4-1; The intermediate piece C that is processed into is delivered to the mould that is positioned at the 3rd station carry out warm upsetting squeeze and press that to make it external form full, there is the intermediate piece D of concave station at circle center, both sides;
In specific implementation process of the present invention, specifically can followingly operate: intermediate piece C is delivered to the mould that is positioned at the 3rd station, carrying out warm upsetting squeeze presses and makes it circular diameter and reach Φ 32.4mm, cam direction total height is 37.8mm, and thickness is that the 10.7mm two ends fall in that step 301,302 is respectively Φ 23*1, Φ 23*0.5 makes intermediate piece D.
Fig. 5-1 is the structural representation of the intermediate piece E of the warm upsetting moulding process production of invention; Fig. 5-2 is the E-E cutaway view of Fig. 5-1; The intermediate piece D that is processed into is delivered to the 4th station mould, push inward with the circle of punching rod with the centre, the material of compressing into is extruded into die formation one end falls in the intermediate piece E that an end protrudes; Intermediate piece D delivers to the mould that is positioned at the 4th station, carrying out warm upsetting squeeze pressure makes diameter of a circle reach Φ 33.2mm, cam limit total height is 38.4mm, and thickness is 10.7mm, and it is Φ 22.9*5 that an end endoporus is rushed in step, in Fig. 5-2, rush in step and be the mark 402 among the figure, the other end protrudes Φ 15*9 and makes intermediate piece E, and the outline of intermediate piece E, interior profile all are provided with rounding, in Fig. 5-2, the part that protrudes be mark among the figure 401.
Intermediate piece E from the intermediate piece A of Fig. 1 to Fig. 5-1, total constancy of volume.
Fig. 6-1 is the structural representation of the intermediate piece F of the warm upsetting moulding process production of invention; Fig. 6-2 is the F-F cutaway view of Fig. 6-1; The intermediate piece E that is processed into is delivered to the mould of the 5th station, with the punching rod middle waste material is thrust and make intermediate piece F;
Intermediate piece E is delivered to the mould that is positioned at the 5th station, with the punching rod middle waste material is cut off, making it to make endoporus is Φ 22.7mm through hole 502, and press sign at a face, circular diameter is Φ 33.2mm, cam direction total height is 38.40mm, and thickness is the intermediate piece F of 10.7mm.
The finished product structure schematic diagram that Fig. 7 produces for the warm upsetting moulding process of invention.Intermediate piece F is delivered in the mould of the 6th station, flatten with the punching rod that to make diameter be that Φ 33.25mm cam direction total height is 38.45mm, thickness is 10.65mm, and endoporus is the finished product G of Φ 22.7mm.
A plane at intermediate piece E or intermediate piece F presses identification marking 501, and identification marking 501 is one or more points.
In the above-mentioned specific implementation process, inner circle size, excircle configuration size, inner bore chamfering and outline chamfering all can be implemented to reach to meet drawing requirement at the 3rd station to the six stations by drawing.
All sizes in the above-mentioned specific embodiment are the cam of engine camshaft blank of a model of temperature upsetting molding production process production of the present invention, and production technology of the present invention can be produced the cam of camshaft blank of various models.
Material heating-up temperature of the present invention can be controlled in 300-900 ℃, has saved the energy; Yin Wendu of the present invention is below 900 ℃, and the internal organizational structure of material does not change, and subsequent heat treatment processing is simple; Appearance surfaces fineness improves greatly, and dimensional accuracy is guaranteed; The product that the present invention produces with warm upsetting moulding process uses through reality, and it is high a lot of that efficient and quality technique is before wanted, and society and economic benefit are obvious.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in the claimed scope of the invention, and the claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (9)
1. camshaft of car engine cam blank temperature upsetting forming production process, it is characterized in that: described method comprises the steps:
(1), the cut-out station of multiplex's megadyne temperature upsetting machine: cutting off between mould and the drawing-inroller, pass through in the secondary or high-frequency heating, the material of specified diameter is heated to a certain temperature between 300-900 ℃, deliver to the blank mould again and be cut to the satisfactory intermediate piece A of length, intermediate piece A presents cylindric;
(2), the intermediate piece A that is processed in the step (1) is delivered to the mould that is positioned at the first station, middle workpiece A one end upsetting pressure is become chamfering and the first center moulding locating hole, other end punching press the second center moulding locating hole, making an end has the chamfering two ends that the intermediate piece B of center positioning hole is arranged;
(3), the intermediate piece B that is processed in the step (2) is delivered to the shaping mold that is positioned on the second station, upsetting becomes the U-shaped cam of an end, the intermediate piece C of a chamfer to middle workpiece B temperature;
(4), the intermediate piece C that is processed in the step (3) is delivered to the mould that is positioned at the 3rd station carry out warm upsetting squeeze and press that to make it external form full, there is the intermediate piece D of concave station at circle center, both sides;
(5), the intermediate piece D that is processed in the step (4) is delivered to the 4th station mould, push inward with the circle of punching rod with the centre, the material of compressing into is extruded into die formation one end falls in the intermediate piece E that an end protrudes;
(6), the intermediate piece E that is processed in the step (5) is delivered to the mould of the 5th station, with the punching rod middle waste material is thrust and make intermediate piece F;
(7), the intermediate piece F that is processed in the step (6) is delivered in the mould of the 6th station, flatten with the punching rod and make finished product G;
A plane at intermediate piece E or intermediate piece F in described step (6) or the step (7) presses identification marking, and described identification marking is one or more points.
2. camshaft of car engine cam blank temperature upsetting forming production process according to claim 1, it is characterized in that: the length of the intermediate piece A in the described step (1) is 24.5mm.
3. camshaft of car engine cam blank temperature upsetting forming production process according to claim 1, it is characterized in that: the chamfering in the described step (2) is chamfering R10, the specification of the first center moulding locating hole in the described step (2) is Φ 5*150 °, and the specification of the second center moulding locating hole in the described step (2) is Φ 5*150 °.
4. camshaft of car engine cam blank temperature upsetting forming production process according to claim 1, it is characterized in that: U-shaped cam is that a chamfer is 20 ± 3 ° in the described step (3), circular diameter is Φ 32mm, and cam direction total height is 36mm, and thickness is the intermediate piece C of 10.9mm.
5. camshaft of car engine cam blank temperature upsetting forming production process according to claim 1, it is characterized in that: described step (4) specifically comprises the steps: intermediate piece C is delivered to the mould that is positioned at the 3rd station, carrying out warm upsetting squeeze presses and makes it circular diameter and reach Φ 32.4mm, cam direction total height is 37.8mm, and thickness is that the 10.7mm two ends fall in step and are respectively Φ 23*1,23*0.5 and make intermediate piece D.
6. camshaft of car engine cam blank temperature upsetting forming production process according to claim 1, it is characterized in that: described step (5) is delivered to intermediate piece D the mould that is positioned at the 4th station, carry out warm upsetting squeeze pressure a round end endoporus is rushed in, the other end protrudes makes intermediate piece E.
7. camshaft of car engine cam blank temperature upsetting forming production process according to claim 6, it is characterized in that: described step (5) is delivered to intermediate piece D the mould that is positioned at the 4th station, carrying out warm upsetting squeeze pressure makes diameter of a circle reach Φ 33.2mm, cam limit total height is 38.4mm, thickness is 10.7mm, it is Φ 22.9*5 that one end endoporus is rushed in step, and the other end protrudes Φ 15*9 and makes intermediate piece E.
8. camshaft of car engine cam blank temperature upsetting forming production process according to claim 1, it is characterized in that: described step is delivered to the mould that is positioned at the 5th station with intermediate piece E in (6), with the punching rod middle waste material is cut off, making it to make endoporus is Φ 22.7mm through hole, and press sign at a face, circular diameter is Φ 33.2mm, and cam direction total height is 38.40mm, and thickness is the intermediate piece F of 10.7mm.
9. camshaft of car engine cam blank temperature upsetting forming production process according to claim 1, it is characterized in that: in the described step (7) intermediate piece F is delivered in the mould of the 6th station, flatten with the punching rod that to make diameter be that Φ 33.25mm cam direction total height is 38.45mm, thickness is 10.65mm, and endoporus is the finished product G of Φ 22.7mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210464951.5A CN102941308B (en) | 2012-11-16 | 2012-11-16 | Thermal-forging forming production method for cam blank of cam shaft of automobile engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210464951.5A CN102941308B (en) | 2012-11-16 | 2012-11-16 | Thermal-forging forming production method for cam blank of cam shaft of automobile engine |
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| CN102941308A true CN102941308A (en) | 2013-02-27 |
| CN102941308B CN102941308B (en) | 2014-09-10 |
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Citations (8)
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|---|---|---|---|---|
| JPH04231405A (en) * | 1990-06-06 | 1992-08-20 | Miba Sintermetall Ag | Preparation of cam shaft |
| JPH08109809A (en) * | 1994-10-11 | 1996-04-30 | Nippon Seiko Kk | Manufacture of cam lobe for assembly |
| JPH09276976A (en) * | 1996-04-11 | 1997-10-28 | Mitsubishi Materials Corp | Production of cam piece for assembled cam shaft and hot-forging die used for the production |
| JPH09280013A (en) * | 1996-04-11 | 1997-10-28 | Mitsubishi Materials Corp | Cam piece for assembled camshaft |
| EP1331052A2 (en) * | 2002-01-24 | 2003-07-30 | Nissan Motor Company, Limited | Production method of cam lobe piece of assembled camshaft |
| CN1513094A (en) * | 2000-11-14 | 2004-07-14 | 本田技研工业株式会社 | Cam block and method for manufacturing the same |
| CN100439661C (en) * | 2003-12-12 | 2008-12-03 | 本田技研工业株式会社 | Camshaft, method of manufacturing cam for camshaft, and method of manufacturing shaft for camshaft |
| CN101850399A (en) * | 2010-05-14 | 2010-10-06 | 付仕忠 | Process method for forging brake cam of automobile |
-
2012
- 2012-11-16 CN CN201210464951.5A patent/CN102941308B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04231405A (en) * | 1990-06-06 | 1992-08-20 | Miba Sintermetall Ag | Preparation of cam shaft |
| JPH08109809A (en) * | 1994-10-11 | 1996-04-30 | Nippon Seiko Kk | Manufacture of cam lobe for assembly |
| JPH09276976A (en) * | 1996-04-11 | 1997-10-28 | Mitsubishi Materials Corp | Production of cam piece for assembled cam shaft and hot-forging die used for the production |
| JPH09280013A (en) * | 1996-04-11 | 1997-10-28 | Mitsubishi Materials Corp | Cam piece for assembled camshaft |
| CN1513094A (en) * | 2000-11-14 | 2004-07-14 | 本田技研工业株式会社 | Cam block and method for manufacturing the same |
| EP1331052A2 (en) * | 2002-01-24 | 2003-07-30 | Nissan Motor Company, Limited | Production method of cam lobe piece of assembled camshaft |
| CN100439661C (en) * | 2003-12-12 | 2008-12-03 | 本田技研工业株式会社 | Camshaft, method of manufacturing cam for camshaft, and method of manufacturing shaft for camshaft |
| CN101850399A (en) * | 2010-05-14 | 2010-10-06 | 付仕忠 | Process method for forging brake cam of automobile |
Non-Patent Citations (1)
| Title |
|---|
| 张海筹等: "弧面凸轮毛坯制造方法探讨-温锻成形", 《热加工工艺》, no. 11, 30 November 2005 (2005-11-30), pages 79 - 80 * |
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| CN102941308B (en) | 2014-09-10 |
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Free format text: FORMER OWNER: ZHENG XIAOYUAN Effective date: 20140523 Owner name: ZHENG XIAOYUAN Free format text: FORMER OWNER: SHANGHAI HALONG AUTOMOBILE STANDARD PART CO., LTD. Effective date: 20140523 |
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