CN106891258A - A kind of method for processing die cast metal parts - Google Patents
A kind of method for processing die cast metal parts Download PDFInfo
- Publication number
- CN106891258A CN106891258A CN201510964850.8A CN201510964850A CN106891258A CN 106891258 A CN106891258 A CN 106891258A CN 201510964850 A CN201510964850 A CN 201510964850A CN 106891258 A CN106891258 A CN 106891258A
- Authority
- CN
- China
- Prior art keywords
- bead
- workpiece
- metal parts
- cast metal
- die cast
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
Abstract
The invention provides a kind of method for processing die cast metal parts, wherein, the method comprises the following steps：(1) die cast metal parts are carried out into bead, obtains the workpiece after bead；(2) workpiece after bead is processed by shot blasting, obtains the workpiece after polishing；(3) workpiece after polishing is carried out into blasting treatment, obtains the workpiece after blasting treatment.By above-mentioned technical proposal, the present invention significantly decreases the incidence of the skin effect phenomenon after blasting treatment, thus substantially increases the yield rate of processing die cast metal parts.
Description
Technical field
The present invention relates to metal processing sectors, in particular it relates to a kind of side for processing die cast metal parts
Method.
Background technology
Die casting, full name is compression casting, refer to by molten alloy under high pressure, high-speed condition fill mould
Tool die cavity, and the casting method of cooling shaping under high pressure, are most widely used, development in casting technique
One of fastest metal heat processing and forming process.Die casting is used as a kind of advanced non-ferrous alloy
Precision parts forming technique, has adapted to product complication, precise treatment, light weight in modern manufacturing industry
Change, energy-saving, the requirement of greenization, application field are constantly widened.With die casting equipment and technique skill
Art level is improved constantly, and the range of application of die-cast product will constantly expand on the basis of existing.
The surface of die cast metal parts needs further to carry out sandblasting processing, after being beneficial to spray painting, plastic-spraying etc.
Continuous treatment.Sandblasting refers to the process of the percussion cleaning and roughening matrix surface using high speed sand flow.
It is power that sandblasting uses compressed air, to form high velocity spray beam by material spray (copper ore, quartz sand, gold
Emery, iron sand, SEMEN AMOMI LONGILIGULA) need workpiece surface to be processed is ejected at a high speed, make the appearance of workpiece surface
The appearance or shape in face change, impact and shear action due to abrasive material to workpiece surface, make work
The surface of part obtains certain cleannes and different roughness, obtains the mechanical performance of workpiece surface
Improve, therefore improve the fatigue resistance of workpiece, increased its adhesive force and coating between, extend
The durability of film, is also beneficial to the levelling and decoration of coating.
After the mode of application sandblasting is processed to die cast metal parts, showing for peeling often occurs
As.For die casting sandblasting skin effect phenomenon, currently without good post-processing approach.It is existing in industry
Post-processing approach be by controlling blasting craft, reduce the parameters such as blasting pressure, or by change
Mold design etc.；But, blasting craft parameter change can cause the appearance of sandblasting not reach will
Ask, sandblasting efficiency reduction, and remain on do not reach well eliminate skin effect phenomenon；And change mould
Design on the one hand it is difficult to ensure that redesign mould peeling will not again occur, on the other hand, again
Change mould can be dramatically increased processing cost and extension of the work cycle.
Therefore, the existing method that die cast metal parts are processed by blasting treatment is existed and is difficult to eliminate
The defect of skin.
The content of the invention
It is difficult to eliminate to overcome the existing method for processing die cast metal parts by blasting treatment to exist
The defect of peeling, the invention provides a kind of method for processing die cast metal parts.
If it was found by the inventors of the present invention that before blasting treatment is carried out to die cast metal parts, passed through
Bead and polishing carry out the pretreatment on surface, can significantly decrease rising after blasting treatment
The incidence of skin phenomenon, resulting in the present invention.
The invention provides a kind of method for processing die cast metal parts, wherein, the method includes following step
Suddenly：(1) die cast metal parts are carried out into bead, obtains the workpiece after bead；(2) will spray
Ball treatment after workpiece be processed by shot blasting, obtain the workpiece after polishing；(3) by polishing
Workpiece afterwards carries out blasting treatment, obtains the workpiece after blasting treatment.
By above-mentioned technical proposal, the present invention significantly decreases the generation of the skin effect phenomenon after blasting treatment
Rate, thus substantially increases the yield rate of processing die cast metal parts.
Other features and advantages of the present invention will give specifically in subsequent specific embodiment part
It is bright.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute the part of specification,
It is used to explain the present invention together with following specific embodiment, but does not constitute to limit of the invention
System.In the accompanying drawings：
Fig. 1 is the photo by the die cast metal parts after shot-peening, polishing and blasting treatment in embodiment 1.
Fig. 2 is that die cast metal parts directly carry out the photo after blasting treatment in comparative example 1.
Fig. 3 is photo of the die cast metal parts after directly carrying out blasting treatment after shot-peening in comparative example 2.
Specific embodiment
Specific embodiment of the invention is described in detail below in conjunction with accompanying drawing.It should be understood that
It is that specific embodiment described herein is merely to illustrate and explain the present invention, and is not limited to
The present invention.
The invention provides a kind of method for processing die cast metal parts, wherein, the method includes following step
Suddenly：(1) die cast metal parts are carried out into bead, obtains the workpiece after bead；(2) will spray
Ball treatment after workpiece be processed by shot blasting, obtain the workpiece after polishing；(3) by polishing
Workpiece afterwards carries out blasting treatment, obtains the workpiece after blasting treatment.
Wherein, it may be possible to pruned due to the surface of die cast metal parts reform by shot-peening, released
The stress on the surface of die cast metal parts is put, can be produced through shot-peening for the place of direct sandblasting meeting peeling and cut
Cut pruning and some defects such as concavo-convex occur, then it goes by the defect that can cause shot-peening after polishing
Except and it is smooth, finally carry out sandblasting can significantly reduce even eliminate skin effect phenomenon.
Wherein, the condition of the bead do not require particularly, can be used in for this area
The normal condition of die cast metal parts is processed, for example, can be included：Pressure can be 0.1-1MPa,
Preferably 0.3-0.7MPa, the shot-peening time is 1-10 minutes, preferably 3-7 minutes.
Wherein, the hardness of the pill used by the bead can change in the larger context, example
The Mohs' hardness of the pill used by bead may be at the scope not less than 5, preferably Mohs as described
Hardness is in the scope not less than 5.5；Wherein, the particle diameter of the pill used by the bead can be
Change in larger scope, for example, the particle diameter of the pill used by the bead enable to it is described
The screen cloth that pill passes through 50-500 mesh, preferably by the screen cloth of 100-400 mesh.
Wherein, the material of the die cast metal parts can be acid bronze alloy, zirconium-base amorphous alloy, titanium-based
At least one in non-crystaline amorphous metal and cu-based amorphous alloys.The material of the die cast metal parts can pass through
Vacuum smelting method melting is obtained.The die cast metal parts can by by metal material with evacuated die-casting process
Method is prepared.
Wherein, according to a kind of implementation method specifically preferred according to the invention, the material of the die cast metal parts
It is acid bronze alloy, the pill used by the bead is zirconium pearl, the Mohs' hardness of the zirconium pearl can be with
In the range of not less than 5, the particle diameter of the zirconium pearl enables to the zirconium pearl to pass through 200-400 mesh
Screen cloth.
Wherein, the composition of the acid bronze alloy can be the composition of various zirconium-base amorphous alloys, for example, contain
There is the Al of the Mn and 3.1-15 weight % of Cu, 21-40 weight % of 45-75.9 weight %.
Wherein, according to a kind of implementation method specifically preferred according to the invention, the material of the die cast metal parts
It is zirconium-base amorphous alloy, the pill used by the bead is zirconium pearl, the Mohs' hardness of the zirconium pearl
>=5.5, the particle diameter of the zirconium pearl enables to the zirconium pearl to pass through the screen cloth of 100-200 mesh.
Wherein, the composition of the zirconium-base amorphous alloy can be the composition of various zirconium-base amorphous alloys, for example
It is the Ni of the Cu and 1-10 weight % of Zr, 10-40 weight % containing 50-70 weight %.
Wherein, the polishing can include hand polish, mechanical polishing and chemical polishing in extremely
Few one kind.
Wherein, the throwing in concave-convex surface region of the polishing to being produced by shot-peening is recessed except depth reaches
Below face.
Wherein, the condition of the blasting treatment do not require particularly, can be according to this area to die casting
Metalwork carries out the various conditions of sandblasting processing, for example, can include：Blasting pressure can be
0.1-1MPa, preferably 0.3-0.7MPa, blast time can be 1-10 minutes, preferably 2-7 points
Clock.
Wherein, the sand grains used by the blasting treatment be various conventional sand, such as ceramic sand, bead and
At least one in quartz sand, hardness can change in the larger context, such as described blasting treatment
The Mohs' hardness of sand grains used may be in the range of not less than 4, be preferably in the scope of 4.5-6
It is interior.
Wherein, the particle diameter of the sand grains used by the blasting treatment can change in the larger context, example
If so that the sand grains is by the screen cloth of 100-800 mesh, preferably by the screen cloth of 500-700 mesh.
Wherein, the workpiece after the blasting treatment can be used as the die-cast metal after processing of the invention
Part, can enter subsequent handling.
The present invention is further described by the following examples.
Embodiment 1
By acid bronze alloy, (composition is Cu75Mn21AL4) die cast metal parts that die casting is obtained, it is placed in shot-peening
Bead is carried out in machine, the workpiece after bead is obtained, wherein, the pressure of shot-peening is
0.5MPa, the time is 5 minutes, and the pill used by bead is zirconium pearl, and Mohs' hardness is 5.5, greatly
It is small for can be by the screen cloth of 300 mesh.
Workpiece after bead is polished, the workpiece after being polished, wherein, the polishing
Process to the throwing in concave-convex surface region produced by shot-peening except depth is reached below concave surface.
Workpiece after polishing is placed in carries out blasting treatment in sand-blasting machine, obtain the work after blasting treatment
Part, wherein, the pressure of sandblasting is 0.5MPa, and the time is 3 minutes, and the sand grains used by blasting treatment is
Bead, Mohs' hardness is 5, and size is can be by the screen cloth of 600 mesh.
Workpiece after blasting treatment obtained above is the workpiece after the treatment of the present embodiment, this implementation
The surface picture of the workpiece after the treatment of example is as shown in Figure 1.
Comparative example 1
By acid bronze alloy, (composition is Cu75Mn21Al4) die cast metal parts that die casting is obtained, it is placed in sandblasting
Blasting treatment is carried out in machine, the workpiece after blasting treatment is obtained, wherein, the pressure of sandblasting is
0.5MPa, the time is 3 minutes, and the sand grains used by blasting treatment is bead, and Mohs' hardness is 5, greatly
It is small for can be by the screen cloth of 600 mesh.
Workpiece after blasting treatment obtained above is the workpiece after the treatment of this comparative example, this contrast
The surface picture of the workpiece after the treatment of example is as shown in Figure 2.
Comparative example 2
Method according to embodiment 1 is processed acid bronze alloy, and difference is：Polishing step is not contained.
By acid bronze alloy, (composition is Cu75Mn21AL4) die cast metal parts that die casting is obtained, it is placed in shot-peening
Bead is carried out in machine, the workpiece after bead is obtained, wherein, the pressure of shot-peening is
0.5MPa, the time is 5 minutes, and the pill used by bead is zirconium pearl, and Mohs' hardness is 5.5, greatly
It is small for can be by the screen cloth of 300 mesh.
Workpiece after bead is placed directly within sand-blasting machine carries out blasting treatment, obtains blasting treatment
Workpiece afterwards, wherein, the pressure of sandblasting is 0.5MPa, and the time is 3 minutes, used by blasting treatment
Sand grains is bead, and Mohs' hardness is 5, and size is can be by the screen cloth of 600 mesh.
Workpiece after blasting treatment obtained above is the workpiece after the treatment of the present embodiment.This comparative example
Treatment after workpiece surface picture it is as shown in Figure 3.
Testing example 1
Embodiment 1, comparative example 1 and comparative example 2 are each carried out into 100 parallel tests, peeling is counted
Number, as a result as shown in table 1.Fig. 1 is the photo that embodiment 1 does not occur the workpiece of peeling.Fig. 2 is
There is the photo of the workpiece of peeling in comparative example 1.Fig. 3 is that the sample surfaces of comparative example 2 occur peeling and produce
The photo of many hole points.
Table 1
| Group | Peeling number | Non- peeling number | Yield |
| Comparative example 1 (non-shot-peening) | 67 | 33 | 33% |
| Embodiment 1 (has shot-peening 5min) | 5 | 95 | 95% |
| Comparative example 2 (is not polished) | 55 | 45 | 45% |
Data according to table 1 are visible, and the present invention significantly decreases the generation of the skin effect phenomenon after blasting treatment
Rate, thus substantially increases the yield rate of processing die cast metal parts.
Embodiment 2
By zirconium-base amorphous alloy, (composition is Zr55All0Ni5Cu30) die cast metal parts that die casting is obtained, put
Bead is carried out in compressed air shotblasting machine, the workpiece after bead is obtained, wherein, the pressure of shot-peening is
0.5MPa, the time is 5 minutes, and the pill used by bead is zirconium pearl, and Mohs' hardness is 6, size
For can be by the screen cloth of 150 mesh.
Workpiece after bead is polished, the workpiece after being polished, wherein, the polishing
Process to the throwing in concave-convex surface region produced by shot-peening except depth is reached below concave surface..
Workpiece after polishing is placed in carries out blasting treatment in sand-blasting machine, obtain the work after blasting treatment
Part, wherein, the pressure of sandblasting is 0.5MPa, and the time is 3 minutes, and the sand grains used by blasting treatment is
Ceramic sand, Mohs' hardness is 5.5, and size is can be by the screen cloth of 500 mesh.
Workpiece after blasting treatment obtained above is the workpiece after the treatment of the present embodiment.
Comparative example 3
By zirconium-base amorphous alloy, (composition is Zr55All0Ni5Cu30) die cast metal parts that die casting is obtained, put
Blasting treatment is carried out in sand-blasting machine, the workpiece after blasting treatment is obtained, wherein, the pressure of sandblasting is
0.5MPa, the time is 3 minutes, and the sand grains used by blasting treatment is ceramic sand, and Mohs' hardness is 5.5,
Size is can be by the screen cloth of 500 mesh.
Workpiece after blasting treatment obtained above is the workpiece after the treatment of this comparative example.
Comparative example 4
Method according to embodiment 2 is processed zirconium-base amorphous alloy, and difference is：Polishing is not contained
Step.
Testing example 2
Embodiment 2, comparative example 3 and comparative example 4 are each carried out into 100 parallel tests, peeling is counted
Number, as a result as shown in table 2.
Table 2
| Group | Peeling number | Non- peeling number | Yield |
| Comparative example 3 (non-shot-peening) | 79 | 21 | 21% |
| Embodiment 2 (has shot-peening 5min) | 18 | 82 | 80% |
| Comparative example 4 (is not polished) | 65 | 35 | 35% |
Data according to table 2 are visible, and the present invention significantly decreases the generation of the skin effect phenomenon after blasting treatment
Rate, thus substantially increases the yield rate of processing die cast metal parts.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not
It is limited to the detail in above-mentioned implementation method, in range of the technology design of the invention, can be to this
The technical scheme of invention carries out various simple variants, and these simple variants belong to protection model of the invention
Enclose.
It is further to note that each particular technique described in above-mentioned specific embodiment is special
Levy, in the case of reconcilable, can be combined by any suitable means, in order to avoid not
Necessary repetition, the present invention is no longer separately illustrated to various possible combinations.
Additionally, can also be combined between a variety of implementation methods of the invention, as long as
, without prejudice to thought of the invention, it should equally be considered as content disclosed in this invention for it.
Claims (11)
1. it is a kind of process die cast metal parts method, it is characterised in that the method comprises the following steps：
(1) die cast metal parts are carried out into bead, obtains the workpiece after bead；
(2) workpiece after bead is processed by shot blasting, obtains the workpiece after polishing；
(3) workpiece after polishing is carried out into blasting treatment, obtains the workpiece after blasting treatment.
2. method according to claim 1, wherein, the condition of the bead includes：Spray
Ball pressure is 0.1-1MPa, and the shot-peening time is 1-10 minutes.
3. method according to claim 2, wherein, the condition of the bead includes：Spray
Ball pressure is 0.3-0.7MPa, and the shot-peening time is 3-7 minutes.
4. the method according to any one in claim 1-3, wherein, the bead institute
The Mohs' hardness of pill is not less than 5, the particle diameter of the pill used by the bead is enabled to
The screen cloth that the pill passes through 100-500 mesh.
5. the method according to any one in claim 1-3, wherein, the die cast metal parts
Material can be in acid bronze alloy, zirconium-base amorphous alloy, titanium-based amorphous alloy and cu-based amorphous alloys
At least one.
6. method according to claim 4, wherein, the material of the die cast metal parts is copper-based
Alloy, the pill used by the bead is zirconium pearl, and the Mohs' hardness of the zirconium pearl is not less than 5, institute
The particle diameter for stating zirconium pearl enables to the zirconium pearl to pass through the screen cloth of 200-400 mesh.
7. method according to claim 4, wherein, the material of the die cast metal parts is zirconium base
Non-crystaline amorphous metal, the pill used by the bead is zirconium pearl, and the Mohs' hardness of the zirconium pearl is not less than
5.5, the particle diameter of the zirconium pearl enables to the zirconium pearl to pass through the screen cloth of 100-200 mesh.
8. the method according to any one in claim 1-3, wherein, the polishing bag
Include at least one in hand polish, mechanical polishing and chemical polishing.
9. method according to claim 8, wherein, the polishing because of shot-peening to producing
The throwing in concave-convex surface region is reached below concave surface except depth.
10. the method according to any one in claim 1-3, wherein, the blasting treatment
Condition includes：Blasting pressure is 0.1-1MPa, and blast time is 1-5 minutes.
11. methods according to claim 10, wherein, wherein, used by the blasting treatment
The Mohs' hardness of sand grains is not less than 4；The particle diameter of the sand grains used by the blasting treatment enables to the sand
The screen cloth that grain passes through 100-800 mesh.
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| CN201510964850.8A CN106891258A (en) | 2015-12-18 | 2015-12-18 | A kind of method for processing die cast metal parts |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110328345A (en) * | 2019-08-05 | 2019-10-15 | 长泰县海力机械制造有限公司 | A kind of production technology for preventing casting from peeling |
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Application publication date: 20170627 |