CN103521669B - The method of engine link power forging - Google Patents
The method of engine link power forging Download PDFInfo
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- CN103521669B CN103521669B CN201310481757.2A CN201310481757A CN103521669B CN 103521669 B CN103521669 B CN 103521669B CN 201310481757 A CN201310481757 A CN 201310481757A CN 103521669 B CN103521669 B CN 103521669B
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- forging
- prefabricated blank
- powder
- similar figures
- die
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Abstract
A kind of method that the invention provides engine link power forging, described method includes: step 1: make similar figures powder prefabricated blank；Step 2: forge described prefabricated blank.The present invention provides the powder forging process of a kind of engine link, by employing metal dust as raw material, and rationally make prefabricated blank, improve the forging precision of engine link, improve raw-material utilization rate, and the energy ezpenditure produced when decreasing forging simultaneously.
Description
Technical field
The present invention relates to the making field of engine link, be specifically related to a kind of engine link power forging
Method.
Background technology
Connecting rod is by the great part of alternate stress in automobile engine, it is desirable to high intensity, in high precision,
Fig. 1 is a typical rod forging drawing, and orthodox car connecting rod generally individually forms with high strength steel forging,
First the raw material cut is heated to forging temperature through Medium Frequency Induction Heating Furnace, more on pressure forging roll
It is spherical that road is rolled into two, and stage casing is the blank of round bar shape, then blocking on forging press, finally exists
In finisher, finish-forging shapes, and Fig. 2 is the forging schematic diagram of typical steel forging connecting rod, as in figure 2 it is shown, by
Then in upper and lower two open type modules: finish forging in upper mold 2.1 and lower mold 2.3, the most unnecessary
Metal overflows along by-level die face periphery and forms overlap 2.7, and leaves gross weight 2.6 in the middle of macropore, little
Hole often can not be forged out and is formed blind hole 2.4.Overlap 2.7 excises after treating with gross weight 2.6, blind hole
2.4 by machining excision, and the metal material therefore wasted is more than gross weight 50%, and forging 2.2 periphery
All leave draft angle 2.5 and add forge weight.
Summary of the invention
In view of this, a kind of method that the invention provides engine link power forging, by using
Metal dust is as raw material, and rationally makes prefabricated blank, improves the forging essence of engine link
Degree, improves raw-material utilization rate, and the energy ezpenditure produced when decreasing forging simultaneously.
The powder forging process of a kind of engine link that the present invention provides, including:
Step 1: make similar figures powder prefabricated blank；
Step 2: forge described prefabricated blank.
Described step 1 includes:
Step 1.1: determine style and the size of similar figures prefabricated blank；
Step 1.2: the style of the similar figures prefabricated blank determined according to step 1.1 and size, determines also
Make similar figures prefabricated blank mould；
Step 1.3: to the similar figures built-in powder of prefabricated blank mould；
Step 1.4: compacting and the demoulding, obtains similar figures powder prefabricated blank.
Described step 1.1 includes:
Step 1.1.1: the geometry of engine link to be produced is resolved into multiple solid；
Step 1.1.2: determine similar figures prefabricated blank based on the plurality of solid: similar figures prefabricated blank
The centre-to-centre spacing at two ends identical with the centre-to-centre spacing at engine link two ends to be produced；Described similar figures are pre-
The height of base is higher than the height of engine link to be produced；The outer rim chi of described similar figures prefabricated blank
The very little physical dimension less than engine link to be produced；The inner dimensions of described similar figures prefabricated blank is big
Inner dimensions in engine link to be produced.
Described step 1.2 includes:
Step 1.2.1: determine the concave die cavity size of similar figures prefabricated blank mould: described concave die cavity
The floor projection of the similar figures prefabricated blank that size and step 1.1 determine is equivalently-sized；
Step 1.2.2: determine the horizontal cross section dimension of similar figures prefabricated blank mold portions stamping: institute
State the floor projection of the similar figures prefabricated blank that the horizontal cross section dimension of each several part stamping determines with step 1.1
Equivalently-sized；
Step 1.2.3: according to the density of prefabricated blank and the pine dress ratio of raw meal or according to setting density,
Determine the dress powder height of similar figures prefabricated blank mould；
Step 1.2.4: make similar figures prefabricated blank mould.
Described step 2 includes:
Step 2.1: determine forging style and size；
Step 2.2: the style of the forging determined according to step 2.1 and size, determines and makes enclosed
Forging die；
Step 2.3: heating preforms also puts into closed forging die mould, press under the upper mold of closed forging die by
Prefabricated blank forging and stamping are the finest and close to the die cavity being full of closed forging die, then return upper mold；
Step 2.4: eject the lower mold of closed forging die in the die of closed forging die, thus complete forging
Shaping.
The two ends centre bore of the forging that described step 2.1 determines away from engine link two ends to be produced
Centre-to-centre spacing identical；The height of described forging is identical with the height of engine link to be produced；Described
The outer peripheral wall part of forging is straight wall；The inner hole wall band at described forging two ends is gradient.
Described step 2.2 includes:
Step 2.2.1: determine the die inner chamber size of closed forging die: in the die of described closed forging die
The profile projection size of the forging that chamber size determines with step 2.1 is identical, and the cavity wall of die inner chamber is
Straight wall；
Step 2.2.2: determine the big plug of closed forging die and little plug: the external diameter of described big plug with
The macropore internal diameter of the forging that step 2.1 determines is identical；The external diameter of described little plug determines with step 2.1
The hole diameter of forging identical；Short transverse is all with suitable draw taper.
As shown from the above technical solution, the method for a kind of engine link power forging that the present invention provides,
By to prefabricated blank mould use similar figures design so that prefabricated blank shape after with tradition forging compared with two
Head centre bore is away from constant, and each several part short transverse height increases, and the reduction of peripheral part physical dimension,
Inner dimensions increases, it is ensured that the prefabricated blank after shaping can enter forging and molding in closed forging die smoothly；
Additionally, substantially follow, during prefabricated blank design, the principle that unit length is equal with forging corresponding site quality,
And the design of corresponding size is carried out according to the density of designed prefabricated blank, it is ensured that each during preform forging
Position even density.Prefabricated blank is designed as and forging similar shape, and centre bore is away from identical with forging, only
Periphery has uniform gap, it is ensured that enter accurate positioning after mould, will not produce folding, the defect such as be not fully filled.
Closed die forging ensure that forging does not go out overlap, without punching recess or blind hole, not only save a large amount of metal and
And die life is greatly improved.
Accompanying drawing explanation
Fig. 1 is typical rod forging drawing；
Fig. 2 is the forging schematic diagram of typical steel forging connecting rod；
Fig. 3 a is the geometry decomposing schematic representation of engine link to be produced；
Fig. 3 b is the geometry decomposition plan view of engine link to be produced；
Fig. 4 is to fill powder height at the mould longitudinal middle axis central cross-section using the inventive method to determine
Schematic diagram；
Fig. 5 a is the structural representation of the similar figures powder prefabricated blank using the inventive method to make；
Fig. 5 b is the structure top view of the similar figures powder prefabricated blank using the inventive method to make；
Fig. 6 is the forging structural representation using the inventive method to determine；
Fig. 7 is the structural representation of the closed forging die using the inventive method to make.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below to the present invention
Technical scheme in embodiment conducts further description, it is clear that described embodiment is the present invention
A part of embodiment rather than whole embodiments.Based on the embodiment in the present invention, this area is general
The every other embodiment that logical technical staff is obtained on the premise of not making creative work, all
Belong to the scope of protection of the invention.
The method of a kind of engine link power forging that the present invention provides, including:
Step 1: make similar figures powder prefabricated blank；
Wherein, described step 1 includes:
Step 1.1: determine style and the size of similar figures prefabricated blank；
Wherein, described step 1.1 includes:
Step 1.1.1: the geometry of engine link to be produced is resolved into multiple solid；
For ensureing the shaping of powder prefabricated blank, first the geometry of engine link to be produced is divided
Solve the multiple solids being readily formed for powder.Fig. 3 a, Fig. 3 b give engine to be produced even
The geometry decomposing schematic representation of bar, as shown in Figure 3 a, 3 b, can be divided into five along its length
The most contour solid combination: big end strengthens platform 3.1；Big end torus 3.2；Big small end connects flat
Platform reach bar portion 3.3；Bar portion concave part 3.4；The mistake connected between each solid of small end torus 3.5.
Cross part to put aside, shape time to be forged.
Step 1.1.2: determine similar figures prefabricated blank based on the plurality of solid: similar figures prefabricated blank
The centre-to-centre spacing at two ends identical with the centre-to-centre spacing at engine link two ends to be produced；Described similar figures are pre-
The height of base is higher than the height of engine link to be produced；The outer rim chi of described similar figures prefabricated blank
The very little physical dimension less than engine link to be produced；The inner dimensions of described similar figures prefabricated blank is big
Inner dimensions in engine link to be produced.
Step 1.2: the style of the similar figures prefabricated blank determined according to step 1.1 and size, determines also
Make similar figures prefabricated blank mould；
Wherein, described step 1.2 includes:
Step 1.2.1: determine the concave die cavity size of similar figures prefabricated blank mould: described concave die cavity
The floor projection of the similar figures prefabricated blank that size and step 1.1 determine is equivalently-sized；
Step 1.2.2: determine the horizontal cross section dimension of similar figures prefabricated blank mold portions stamping: institute
State the floor projection of the similar figures prefabricated blank that the horizontal cross section dimension of each several part stamping determines with step 1.1
Equivalently-sized.The level of each upper and lower stamping (5-1,5-2,5-3,5-4,5-5) of motion in die
Projection size can be converted into the horizontal projection profiles that prefabricated blank is final as shown in Figure 5 a；
Step 1.2.3: according to the density of prefabricated blank and the pine dress ratio of raw meal or according to setting density,
Determine the dress powder height of similar figures prefabricated blank mould；
Fig. 4 is the schematic diagram filling powder height at mould longitudinal middle axis central cross-section, in figure 4.1～4.5
It is respectively corresponding diagram 5a, each hypomere stamping of Fig. 5 b prefabricated blank.
Step 1.2.4: make similar figures prefabricated blank mould.
Step 1.3: to the similar figures built-in powder of prefabricated blank mould；
Step 1.4: compacting and the demoulding, obtains similar figures powder prefabricated blank.
For forcing bed die floating and force lower mold after suppressing smoothly and press under the demoulding, upper punch after making dress powder
Impulsion is made to machine stop position to be i.e. pressed into desired powder prefabricated blank.Last upper punch rises return
After, the parallel upper top of all bottom punches, by plane on pressed compact top to die, can be taken off workpiece and complete compacting
Technique overall process.
Fig. 5 a, Fig. 5 b are the structural representation of the similar figures powder prefabricated blank using the inventive method to make
Figure；As shown in Fig. 5 a, Fig. 5 b, similar figures powder prefabricated blank includes: big end strengthens platform 5.1；Big end
Torus 5.2；Big small end connecting platform reach bar portion 5.3；Bar portion concave part 5.4；Small end torus 5.5.
The transition portion connected between each solid puts aside, shapes time to be forged.In addition to section transitions circular arc
All similar to forging solid, during to ensure forging, each several part is mainly full of die cavity in thick mode and carries
High density, and flow seldom in the axial direction, such metal forming is full, flowing is uniform, is difficult to out
The defect such as now fold, be not fully filled, the most farthest ensure that each position even density, performance are consistent.
Substantially the principle that unit length is equal with forging quality is followed during design, and according to designed prefabricated blank
Density carries out the design of corresponding size.
Step 2: forge described prefabricated blank.
Wherein, described step 2 includes:
Step 2.1: determine forging style and size；
Wherein, the two ends centre bore of the forging that described step 2.1 determines is away from engine to be produced even
The centre-to-centre spacing at bar two ends is identical；The height of described forging is identical with the height of engine link to be produced；
The outer peripheral wall part of described forging is straight wall；The inner hole wall band at described forging two ends is gradient.Fig. 6
For the forging structural representation using the inventive method to determine.
Step 2.2: the style of the forging determined according to step 2.1 and size, determines and makes enclosed
Forging die；
Wherein, described step 2.2 includes:
Step 2.2.1: determine the die inner chamber size of closed forging die: in the die of described closed forging die
The profile projection size of the forging that chamber size determines with step 2.1 is identical, and the cavity wall of die inner chamber is
Straight wall；
Step 2.2.2: determine the big plug of closed forging die and little plug: the external diameter of described big plug with
The macropore internal diameter of the forging that step 2.1 determines is identical；The external diameter of described little plug determines with step 2.1
The hole diameter of forging identical；Short transverse is all with suitable draw taper.
Fig. 7 is the structural representation of the closed forging die using the inventive method to make.As it is shown in fig. 7,
Closed forging die includes: upper mold sleeve 7.1；Big plug 7.2；Seaming chuck 7.3；Little plug 7.4；On
Small sleeve 7.5；
Integral concave mould 7.6；Lower mold sleeve 7.7；Push-down head 7.8.
Step 2.3: heating preforms also puts into closed forging die mould 7.6, presses under the upper mold of closed forging die
By the finest and close for prefabricated blank forging and stamping to the die cavity being full of closed forging die, then return upper mold；
Step 2.4: eject the lower mold of closed forging die, lower mold part in the die 7.6 of closed forging die
Including lower mold sleeve 7.7, push-down head 7.8 and forging, thus complete forging molding.
As shown from the above technical solution, the method for a kind of engine link power forging that the present invention provides,
By to prefabricated blank mould use similar figures design so that prefabricated blank shape after with tradition forging compared with two
Head centre bore is away from constant, and each several part short transverse height increases, and the reduction of peripheral part physical dimension,
Inner dimensions increases, it is ensured that the prefabricated blank after shaping can enter forging and molding in closed forging die smoothly；
Additionally, substantially follow, during prefabricated blank design, the principle that unit length is equal with forging corresponding site quality,
And the design of corresponding size is carried out according to the density of designed prefabricated blank, it is ensured that each during preform forging
Position even density.Prefabricated blank is designed as and forging similar shape, and centre bore is away from identical with forging, only
Periphery has uniform gap, it is ensured that enter accurate positioning after mould, will not produce folding, the defect such as be not fully filled.
Closed die forging ensure that forging does not go out overlap, without punching recess or blind hole, not only save a large amount of metal and
And die life is greatly improved.
Last it is noted that above example is only in order to illustrate technical scheme, rather than right
It limits；Although the present invention being described in detail with reference to previous embodiment, this area common
Skilled artisans appreciate that the technical scheme described in foregoing embodiments still can be repaiied by it
Change, or wherein portion of techniques feature is carried out equivalent, and these amendments or replacement, not
The essence making appropriate technical solution departs from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (3)
1. the method for an engine link power forging, it is characterised in that described method includes:
Step 1: make similar figures powder prefabricated blank；Concretely comprise the following steps: step 1.1: determine the style of similar figures powder prefabricated blank
And size；Step 1.2: the style of the similar figures powder prefabricated blank determined according to step 1.1 and size, determines and makes similar figures
Powder prefabricated blank mould；Step 1.3: to the similar figures powder built-in powder of prefabricated blank mould；Step 1.4: compacting and the demoulding, obtains phase
Like shape powder prefabricated blank；
Step 2: forge described prefabricated blank；Concretely comprise the following steps: step 2.1: determine forging style and size particularly as follows: the forging that determines
The two ends centre bore of part away from the centre bore with engine link two ends to be produced away from identical；The height of described forging is with to be produced
The height of engine link identical；The outer peripheral wall part of described forging is straight wall；The inner hole wall at described forging two ends with
Gradient；Step 2.2: the style of the forging determined according to step 2.1 and size, determines and makes closed forging die, particularly as follows: step
2.2.1: determine the die inner chamber size of closed forging die: the forging that the die inner chamber size of described closed forging die determines with step 2.1
The profile projection size of part is identical, and the cavity wall of die inner chamber is straight wall；Step 2.2.2: determine closed forging die big plug and
Little plug: the macropore internal diameter of the forging that the external diameter of described big plug determines with step 2.1 is identical；The external diameter of described little plug and step
The hole diameter of rapid 2.1 forging determined is identical；Short transverse is all with suitable draw taper；Step 2.3: heating preforms is also
And put into closed forging die, the upper mold of closed forging die is pressed the finest and close, so for prefabricated blank forging and stamping to the die cavity being full of closed forging die down
After return upper mold；Step 2.4: eject the powder forging being forged in the die of closed forging die with push-down head, thus complete forging
Shaping.
The forging method of engine link the most according to claim 1, it is characterised in that described step 1.1 includes:
Step 1.1.1: the geometry of engine link to be produced is resolved into multiple solid；
Step 1.1.2: determine similar figures powder prefabricated blank based on the plurality of solid: the two ends of similar figures powder prefabricated blank
Centre bore away from the centre bore with engine link two ends to be produced away from identical；The height of described similar figures powder prefabricated blank is higher than
The height of engine link to be produced；The physical dimension of described similar figures powder prefabricated blank is less than engine link to be produced
Physical dimension；The inner dimensions of described similar figures powder prefabricated blank is more than the inner dimensions of engine link to be produced.
The method of engine link power forging the most according to claim 1 and 2, it is characterised in that described step 1.2 is wrapped
Include:
Step 1.2.1: determine the concave die cavity size of similar figures powder prefabricated blank mould: described concave die cavity size and step
The floor projection of the similar figures powder prefabricated blank that 1.1 determine is equivalently-sized；
Step 1.2.2: determine the horizontal cross section dimension of similar figures powder prefabricated blank mold portions stamping: described each several part stamping
The floor projection of similar figures powder prefabricated blank that determines with step 1.1 of horizontal cross section dimension equivalently-sized；
Step 1.2.3: according to the density of prefabricated blank and the pine dress ratio of raw meal or according to setting density, determine similar figures powder
The dress powder height of prefabricated blank mould；
Step 1.2.4: make similar figures powder prefabricated blank mould.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310481757.2A CN103521669B (en) | 2013-10-15 | 2013-10-15 | The method of engine link power forging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310481757.2A CN103521669B (en) | 2013-10-15 | 2013-10-15 | The method of engine link power forging |
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| Publication Number | Publication Date |
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| CN103521669A CN103521669A (en) | 2014-01-22 |
| CN103521669B true CN103521669B (en) | 2016-08-24 |
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| CN201310481757.2A Expired - Fee Related CN103521669B (en) | 2013-10-15 | 2013-10-15 | The method of engine link power forging |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104128549A (en) * | 2014-07-18 | 2014-11-05 | 玉溪大红山矿业有限公司 | Die for powder forging of automobile connecting rod |
| CN104128607A (en) * | 2014-07-21 | 2014-11-05 | 玉溪大红山矿业有限公司 | Manufacturing technology of vehicle connecting rod |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009088771A2 (en) * | 2008-01-04 | 2009-07-16 | Gkn Sinter Metals, Llc | Prealloyed copper powder forged connecting rod |
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2013
- 2013-10-15 CN CN201310481757.2A patent/CN103521669B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009088771A2 (en) * | 2008-01-04 | 2009-07-16 | Gkn Sinter Metals, Llc | Prealloyed copper powder forged connecting rod |
Non-Patent Citations (2)
| Title |
|---|
| 粉末锻造连杆断裂技术的特点;周昌林;《汽车工艺与材料》;19961130(第11期);第44页 * |
| 粉末锻造连杆裂断技术的特点;周昌林;《汽车工艺与材料》;19961130(第11期);第44页 * |
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