CN111070105A - Grading deburring sand blasting process based on multi-groove aluminum casting - Google Patents
Grading deburring sand blasting process based on multi-groove aluminum casting Download PDFInfo
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- CN111070105A CN111070105A CN202010010843.5A CN202010010843A CN111070105A CN 111070105 A CN111070105 A CN 111070105A CN 202010010843 A CN202010010843 A CN 202010010843A CN 111070105 A CN111070105 A CN 111070105A
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- workpiece
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- groove
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- 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
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
- B24C1/083—Deburring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
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- Application Of Or Painting With Fluid Materials (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention provides a grading deburring and sand blasting process based on a multi-groove aluminum casting, which comprises the following steps of: assembling a workpiece: providing a workpiece to be processed, clamping the workpiece on a rotating shaft, and synchronously rotating with the rotating shaft; sand blasting on the outer surface of the circumference: spraying glass sand to the outer surface of the workpiece to be processed by adopting a sand blasting gun to obtain a primary processing workpiece with the burrs on the edge of the groove removed; gluing and protecting: coating the UV glue on the outer surface of the primary processed workpiece by using a brush, and curing the UV glue by using an ultraviolet lamp while coating; sand blasting at the groove bottom: spraying the soft sand mixed water flow to the bottom of the groove of the primary machined workpiece by using a high-pressure spray gun to obtain a finish machined workpiece; sol: cleaning the UV glue; utilize the glass sand to polish to the groove face burr on its periphery, use the UV to glue simultaneously and carry out the protection of the peripheral that has polished, then adopt the flexible sand that has mixed rivers to carry out the sandblast burring, accomplish the effect that both can both automize the deburring, the long-term contact water of UV glue also can soften in addition, does benefit to the recovery.
Description
Technical Field
The invention relates to the technical field of surface treatment of aluminum castings, in particular to a grading deburring sand blasting process based on a multi-groove aluminum casting.
Background
The surface of the metal part is exposed to debris and microscopic metal particles on the surface, which are called burrs. The more burrs, the lower its quality standard. One of the defects on the surface of the steel is represented by uneven flash at the end of the steel which is cold cut, hot sawed or flame cut, and excessive metal extruded at the welding seam when the pipe is welded. The thickness of the burr at the end of the cold-cut product depends on the gap between the cutting edges. In particular, for an aluminum casting requiring multiple grooves, such as a heat sink, a rail lamp base and other workpieces with multiple teeth and multiple grooves (see fig. 1), the machining process is basically blank manufacturing → blank heat treatment → rough machining (drilling, reaming, cutting) → grinding.
In the technical processes, burrs are easy to appear in the cutting of tooth roots and end faces of tooth grooves, in the process of machining of miniature workpieces and miniature groove positions, burrs can be remained on the edges of rotational flow grooves after the cutting machining, uneven cutting machining textures appear on the bottom faces of the grooves, manual grinding or automatic grinding is needed, and the automatic grinding and deburring method adopted at present comprises the following steps: manual polishing, electrochemical deburring, electrolytic machining, ultrasonic deburring, high-pressure water jetting and sand blasting; however, these methods have their own limitations, and only for the multi-channel aluminum casting product shown in fig. 1, sand blasting + manual deburring is more appropriate; however, the process is low in working efficiency, burrs on the outer end face can be removed by sand blasting, but burrs on the groove bottom of the small-sized groove cannot be removed, and the outer end face of the outer groove which is just polished is damaged if different sand molds and different rates are directly replaced to remove burrs on the groove bottom.
Disclosure of Invention
The invention aims to provide a graded deburring and sand blasting process based on a multi-groove aluminum casting, which is used for solving the problem that the existing deburring method in the background technology cannot be applied to parts with multiple grooves and small grooves.
In order to achieve the purpose, the invention provides a graded deburring and sand blasting process based on a multi-groove aluminum casting, which is used for deburring of a grooved part along the direction of a cylindrical bus and comprises the following steps:
assembling a workpiece: providing a workpiece to be processed: clamping it on the rotating shaft and rotating synchronously with the rotating shaft and
sand blasting on the outer surface of the circumference: spraying glass sand to the outer surface of the workpiece to be processed by adopting a sand-blasting gun, and stopping sand blasting after the workpiece to be processed rotates for 2-3 weeks to obtain a primary processing workpiece with burrs on the edge of the groove removed;
gluing and protecting: coating UV glue on the outer surface of the primary processing workpiece by using a brush, and curing the UV glue by using an ultraviolet lamp to form a protective film;
sand blasting at the groove bottom: spraying the soft sand mixed water flow to the bottom of the groove of the primary processing workpiece by using a high-pressure spray gun; obtaining a finish-machined workpiece;
sol: and cleaning the UV glue by using a UV debonder.
Preferably, before the workpiece assembly process, the workpiece to be processed is inspected by X-ray flaw detection, the sampling frequency is 100%, and the unqualified product is discarded.
Preferably, in the step of blasting the circumferential outer surface, the sand molds blasted by the sand blasting gun are 120# silicon corundum and 100# glass sand, and are mixed according to the part ratio of 1: 1.
Preferably, the nozzle of the sand blasting gun is 5-10cm away from the circumferential outer surface of the workpiece to be treated, and the spraying air pressure is 3kg/cm2。
Preferably, a venturi tube is connected to a jet orifice of the sand blasting gun, and the venturi tube comprises a contraction section, a throat part and a diffusion section which are sequentially connected; the contraction section and the diffusion section are both conical pipes, the throat part is a straight pipe, and the contraction section is connected with the sand blasting gun; the port of the diffuser section forms a blast outlet.
Preferably, the central axis of the diffuser section forms an inclination angle of 45-70 degrees with the horizontal direction, and the sand blasting direction is the same as the rotation direction of the workpiece to be processed.
Preferably, in the step of glue spraying protection, the hairbrush is adhered with UV glue and then abuts against the circumferential outer surface of the primary processing workpiece, the UV glue is coated on the circumferential outer surface of the primary processing workpiece, the hairbrush is not moved, and the coating is uniform by means of the autorotation of the primary processing workpiece.
Preferably, in the step of blasting sand at the bottom of the groove, the soft sand is nylon sand or plastic sand, and the particle size of the soft sand is 0.35-0.45 mm.
Preferably, the high-pressure spray gun has a blasting water pressure of 2kg/cm2-3kg/cm2。
Preferably, in the sol step, the UV debonder used is HASUNCAST 7469.
The invention has the beneficial effects that: in the prior art, the deburring process for multiple grooves is not thorough all the time, and particularly, the deburring process is more difficult to remove burrs for products with multiple grooves and deep grooves, so that the common prior art adopts sand blasting to deburr firstly and then manually polishes the burrs at the groove bottom by using a file; there is no process that is both efficient and performance compatible because the polished groove edges may be damaged if a more focused form of blasting is reused;
in the present invention, however, the workpiece is assembled: providing a workpiece to be processed: clamping the rotary shaft on the rotary shaft, synchronously rotating the rotary shaft and sand blasting the circumferential outer surface: spraying glass sand to the outer surface of the workpiece to be processed by adopting a sand-blasting gun, and stopping sand blasting after the workpiece to be processed rotates for 2-3 weeks to obtain a primary processing workpiece with burrs on the edge of the groove removed; gluing and protecting: coating the UV glue on the outer surface of the primary processing workpiece by using a brush, and curing the UV glue by using an ultraviolet lamp to form a protective film; sand blasting at the groove bottom: spraying the soft sand mixed water flow to the bottom of the groove of the primary processing workpiece by using a high-pressure spray gun; obtaining a finish-machined workpiece; sol: cleaning the UV glue by using a UV debonder; utilize the glass sand to polish to the groove face burr on its periphery, use the UV to glue simultaneously and carry out the protection of the peripheral that has polished, then adopt the flexible sand that has mixed rivers to carry out the sandblast burring, accomplish the effect that both can both automize the deburring, the long-term contact water of UV glue also can soften in addition, does benefit to the recovery.
Drawings
FIG. 1 is a prior art multi-slot workpiece;
FIG. 2 is a process flow diagram of the present invention;
FIG. 3 is a flow chart of the optimization process of the present invention.
Detailed Description
In order to more clearly describe the present invention, the present invention will be further described with reference to the accompanying drawings.
The invention provides a grading deburring sand blasting process based on a multi-groove aluminum casting, which is used for deburring of a grooved part along the direction of a cylindrical bus, and the specific product refers to a figure 1; including the following steps, please refer to fig. 2-3:
assembling a workpiece: providing a workpiece to be processed, clamping the workpiece to be processed on a rotating shaft, rotating the workpiece to be processed synchronously with the rotating shaft, wherein when the rotating shaft drives the workpiece to be processed to rotate, the rotating speed is 1r/min, so that the subsequent process can be fully carried out, and in order to protect the workpiece from being clamped, an anti-skidding silica gel sleeve needs to be sleeved on the rotating shaft; the rotating shaft can also be a mechanical rotating shaft with a clamping jaw, so that the workpiece to be processed can be clamped more stably;
sand blasting on the outer surface of the circumference: the glass sand is sprayed to the outer surface of a workpiece to be processed by a sand-blasting gun, because the groove is formed along the direction of a cylindrical bus, the distribution positions of burrs of the glass sand are generally on a cylindrical cambered surface and the notches of the end surface, and because a plurality of thin-wall gear teeth are formed due to the existence of the notches, the damage of the burrs to the part is very great; therefore, the burrs of the groove edge on the outer peripheral surface need to be polished, and the sand blasting is stopped after the workpiece to be processed rotates for 2-3 weeks, so as to obtain a primary processing workpiece for removing the burrs of the groove edge;
gluing and protecting: coating UV glue on the outer surface of the primary processing workpiece by using a brush, and curing the UV glue by using an ultraviolet lamp to form a protective film; just because the grooves are thin, the grooves can be sprayed to the polished outer circumferential groove surface when the bundling type sand blasting deburring is carried out on the groove bottom, damage can be caused, even breakdown and crack can be caused, so that certain protection needs to be carried out on the outer circumferential surface subjected to sand blasting, the scheme that the groove bottom sand blasting is not carried out firstly, and then the outer circumferential surface sand blasting is carried out is not needed, the groove bottom sand blasting is inconvenient to carry out protection, the UV curing adhesive can be adopted outside the protection firstly, after the ultraviolet lamp is used for curing, the UV curing adhesive is also called shadowless adhesive because the UV curing adhesive is transparent, the sprayed area can be protected when the groove bottom sand blasting is carried out, and observation can be carried out;
sand blasting at the groove bottom: spraying the soft sand mixed water flow to the bottom of the groove of the primary processing workpiece by using a high-pressure spray gun; obtaining a finish-machined workpiece; because the sand blasting and polishing are needed to be carried out on the groove bottom, a more used mode is selected for the adopted sand mold and the adopted mode, the high-pressure water flow mixed flexible sand is not easy to cause deviation and spalling when being sprayed, and can be accurately sprayed to the groove bottom, the water flow buffer can prevent centralized striking from being caused at the groove bottom, and the striking stress and the extrusion stress are relatively small; meanwhile, the UV glue is sprayed in a water flow mixing mode, so that the UV glue can be softened and dissolved in advance to a certain extent, and the subsequent recovery is facilitated;
sol: the UV debonder is adopted to clean the UV glue, and the UV glue can be cured again through the irradiation of the ultraviolet lamp after being dissolved, so that the UV debonder can be recycled after being recovered.
In this embodiment, before the workpiece assembly process, the workpiece to be processed needs to be inspected by X-ray inspection, the sampling frequency is 100%, and the unqualified product is discarded; the X-ray flaw detection can be used for detecting the tiny cracks of the structural member, and because certain impact force exists in the sand blasting process, the internal crack detection is needed before sand blasting, the part breakage and scrapping caused by stress concentration directly in the sand blasting process are prevented, and for a non-magnetic casting, namely an aluminum casting product applicable to the method, the adopted X-ray flaw detection standard is GB/T11346 circular classification standard of X-suspicion photographic inspection pinholes of aluminum alloy castings.
Meanwhile, as a further optimization scheme, in the step of blasting sand on the outer surface of the circumference, sand molds blasted by a sand blasting gun are 120# silicon corundum and 100# glass sand which are mixed according to the part ratio of 1:1, because the silicon corundum and the glass sand can well remove chips and burrs of the aluminum casting, the burrs can be directly broken by hardness, and the glass sand can hit the edge of the groove on the outer circumference into a circular arc with a small radius, so that the burrs can be removed, and the surface of the aluminum casting can be beautified.
In a further optimization of the last variant, the nozzles of the sand blasting guns are located 5-10cm from the circumferential outer surface of the workpiece to be treated, since the sand blasting gunsThe sand blasting gun does not necessarily completely cover the circumferential outer surface of the whole workpiece, so that a plurality of sand blasting guns can be selected to work simultaneously and are arranged side by side to cover the range of the whole circumferential outer surface, meanwhile, because the sand blasting guns do not move and are completely driven by the workpiece to rotate by the rotating shaft, the sand columns sprayed by the sand blasting guns cannot deviate due to the movement of the sand blasting guns, the sand columns can be sprayed at the same angle and the same spraying pressure as far as possible, and the spraying air pressure is 3kg/cm2。
In addition, in order to cover the outer circumferential surface of the workpiece to be processed in a large area, a jet orifice of the sand-blasting gun is connected with a venturi tube, and the venturi tube comprises a contraction section, a throat part and a diffusion section which are sequentially connected; the contraction section and the diffusion section are both conical pipes, the throat part is a straight pipe, and the contraction section is connected with the sand blasting gun; the port of the diffuser section forms a sand blasting outlet; the venturi tube has a venturi effect which shows that when the limited flow passes through a reduced flow section, the flow velocity of the fluid is increased, and the flow velocity is inversely proportional to the flow section; the spraying device is widely applied to a water circulation spraying system of an aquarium for carrying out combustion-supporting air in a hot blast furnace of a steel plant.
In the embodiment, the central axis of the diffusion section forms an inclination angle of 45-70 degrees with the horizontal direction, and the sand blasting direction is the same as the rotating direction of the workpiece to be processed, so that the relative collision between the rotating speed tangential direction and the spraying speed direction is prevented from being directly caused, and the diffusion section can perfectly cover the outer circumferential surface by adopting the same direction with the spraying direction and the rotating direction.
In the embodiment, in the glue spraying protection step, the hairbrush is adhered with the UV glue and then abuts against the circumferential outer surface of the primary processing workpiece, the UV glue is coated on the circumferential outer surface of the primary processing workpiece, the hairbrush is fixed and is uniformly coated by means of autorotation of the primary processing workpiece, so that the glue does not flow to the bottom of the groove when being coated, and the glue protection effect of the outer circumferential surface is ensured.
In the step of blasting the bottom of the tank, the soft sand is nylon sand or plastic sand, the particle size of the soft sand is 0.35-0.45mm, the existence of the water flow can restrict the spraying size and range of the high-pressure spray gun so as to spray the soft sand to the bottom of the tank more accurately,the deburring and polishing are carried out by water flow and soft sand, and the sand blasting water pressure of a high-pressure spray gun is 2kg/cm2-3kg/cm2。
The glue is not only dissolved to a certain extent by means of water flow of a high-pressure spray gun, but also is specially cleaned by a UV debonder in the last step, namely the step of sol, and finally enters the subsequent drying and rust-proof procedures and the like, wherein the model of the UV debonder is HASUCCAST 7469.
The invention has the advantages that:
1) the existing deburring of multi-groove aluminum casting workpieces is mostly carried out by manual polishing, and the sand blasting method can save time and has high efficiency;
2) the mode of hierarchical burring has been adopted, polishes the groove face of outer peripheral surface earlier, then protects by the coating of UV glue, carries out the sandblast to the tank bottom at last, prevents that two kinds of sandblast processes from producing influence each other, accomplishes to protect the position that the sandblast was crossed.
The above disclosure is only for a few specific embodiments of the present invention, but the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (10)
1. The utility model provides a hierarchical burring sandblast technology based on multislot aluminum casting for to removing burr along cylinder generating line direction fluting part, its characterized in that includes the following step:
assembling a workpiece: providing a workpiece to be processed, clamping it on a rotating shaft and rotating synchronously with the rotating shaft and
sand blasting on the outer surface of the circumference: spraying glass sand to the outer surface of the workpiece to be processed by adopting a sand-blasting gun, and stopping sand blasting after the workpiece to be processed rotates for 2-3 weeks to obtain a primary processing workpiece with burrs on the edge of the groove removed;
gluing and protecting: coating UV glue on the outer surface of the primary processing workpiece by using a brush, and curing the UV glue by using an ultraviolet lamp to form a protective film;
sand blasting at the groove bottom: spraying the soft sand mixed water flow to the bottom of the groove of the primary processing workpiece by using a high-pressure spray gun; obtaining a finish-machined workpiece;
sol: and cleaning the UV glue by using a UV debonder.
2. The graded deburring and sand blasting process based on multi-groove aluminum castings according to claim 1, characterized in that before the workpiece assembling process, the workpiece to be processed is also required to be inspected by X-ray inspection, the sampling frequency is 100%, and the unqualified products are discarded.
3. The staged deburring blasting process for aluminum castings according to claim 1, wherein in the circumferential outer surface blasting step, the sand molds blasted by the sand blasting guns are 120# silicon corundum and 100# glass sand, and are mixed in a ratio of 1: 1.
4. The staged deburring blasting process based on multi-channel aluminum castings according to claim 3, characterized in that the nozzle of the blast gun is 5-10cm away from the circumferential outer surface of the workpiece to be treated, and the jet air pressure is 3kg/cm2。
5. The graded deburring and sand blasting process based on the multi-groove aluminum casting as claimed in claim 3, characterized in that a venturi tube is connected to a jet orifice of the sand blasting gun, and the venturi tube comprises a contraction section, a throat part and a diffusion section which are connected in sequence; the contraction section and the diffusion section are both conical pipes, the throat part is a straight pipe, and the contraction section is connected with the sand blasting gun; the port of the diffuser section forms a blast outlet.
6. The process of claim 5, wherein the central axis of the diffuser section is inclined at an angle of 45-70 ° to the horizontal, and the blasting direction is in the same direction as the rotation direction of the workpiece to be treated.
7. The graded deburring and sand blasting process based on the multi-groove aluminum casting as claimed in claim 1, wherein in the step of glue spraying protection, the hairbrush is adhered with UV glue and then abuts against the circumferential outer surface of the primary processing workpiece, the UV glue is coated on the circumferential outer surface of the primary processing workpiece, and the hairbrush is fixed and uniformly coated by means of self-rotation of the primary processing workpiece.
8. The graded deburring blasting process based on multi-groove aluminum castings according to claim 1, characterized in that in the groove bottom blasting step, the soft sand is nylon sand or plastic sand, and the particle size of the soft sand is 0.35-0.45 mm.
9. The staged deburring blasting process of claim 8 wherein the blast pressure of said high pressure lance is 2kg/cm2-3kg/cm2。
10. The multi-channel aluminum casting-based graded deburring blasting process of claim 1 wherein in the sol-gel step the UV debonder employed is hasncast 7469.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112248492A (en) * | 2020-12-18 | 2021-01-22 | 扬昕科技(苏州)有限公司 | Mold core processing device for manufacturing light guide plate with gradually-changed included angle |
| CN112296879A (en) * | 2020-10-29 | 2021-02-02 | 兴化市森荣金属制品有限公司 | Automatic processing method for removing flash and burr of aluminum casting |
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| CN112248492B (en) * | 2020-12-18 | 2021-03-02 | 扬昕科技(苏州)有限公司 | Mold core processing device for manufacturing light guide plate with gradually-changed included angle |
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