CN217874143U - Vacuum bottom plate of magnesium alloy electric brush assembly - Google Patents

Abstract

The utility model discloses a vacuum bottom plate of a magnesium alloy electric brush assembly, which comprises a vacuum bottom plate body, wherein the vacuum bottom plate body is a magnesium alloy metal part formed by die casting magnesium alloy materials by adopting a high-pressure die casting process, one end of the vacuum bottom plate body is formed and connected with a hinge post, and a shaft hole is formed on the connection hinge post; an instrument boss is formed on the outer plate surface of the vacuum bottom plate body, and an instrument positioning cavity is formed in the instrument boss; the edge peripheral shaping has sealed draw-in groove on the interior face of vacuum bottom plate body to the outside coform that lies in sealed draw-in groove on the vacuum bottom plate body has four assembly through-holes. The manufacturing method comprises the steps of die manufacturing, product die casting, material handle removing, plastic spraying pretreatment, surface treatment, cleaning and drying, air tightness detection and finished product warehousing in sequence. The utility model discloses a magnesium alloy material die-casting shaping, not only metallic sense is strong, intensity is high, safe and reliable moreover, and is novel pleasing to the eye.

Description

Vacuum bottom plate of magnesium alloy electric brush assembly

Technical Field

The utility model relates to a manufacturing technology of brush vacuum bottom plate especially relates to a magnesium alloy electric brush subassembly vacuum bottom plate.

Background

At present, most of vacuum bottom plates for high-grade electric brushes are formed by aluminum alloy materials in a die-casting mode, and the rigidity and the strength of the vacuum bottom plates made of the aluminum alloy materials are relatively low, so that the service life of the vacuum bottom plates is also influenced, and the design requirements of safety, attractiveness, high grade and novelty of people at present cannot be met.

Disclosure of Invention

The utility model aims to solve the technical problem that to the current situation of above-mentioned prior art, and provide a magnesium alloy electric brush subassembly vacuum bottom plate that light in weight, intensity are high, long service life, heat dispersion are good.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

the vacuum bottom plate of the magnesium alloy electric brush assembly comprises a vacuum bottom plate body, wherein two connecting hinge columns extending outwards in an inclined manner are formed at one end of the vacuum bottom plate body, and shaft holes for penetrating pin shafts are formed in the connecting hinge columns; the outer plate surface of the vacuum bottom plate body is formed with a protruded instrument boss, and an instrument positioning cavity for positioning and installing a pressure gauge is arranged in the instrument boss; the periphery of the inner plate surface of the vacuum bottom plate body is provided with a sealing clamping groove for clamping the sealing ring, and four assembling through holes are formed on the outer side of the sealing clamping groove on the vacuum bottom plate body.

In order to optimize the technical scheme, the specific measures adopted further comprise:

seven blind holes are formed on the outer plate surface of the vacuum bottom plate body.

Two handle positioning grooves for mounting a handle are formed on the outer plate surface of the vacuum bottom plate body; a central hole is formed in the center of one of the two handle positioning grooves.

The outer plate surface of the vacuum bottom plate body is provided with a bushing hole for installing a threaded bushing.

The inner plate surface of the vacuum bottom plate body is provided with a plurality of reinforcing ribs for enhancing the mechanical strength of the vacuum bottom plate body.

Compared with the prior art, the utility model discloses a vacuum bottom plate is by magnesium alloy material die-casting shaping, the utility model discloses a magnesium alloy material that density is low has replaced traditional aluminum alloy material for product intensity increases substantially, and the security improves. The utility model discloses the manufacturing method of vacuum bottom plate includes mould manufacturing, product die-casting in proper order, goes the material handle, the pretreatment of spraying plastics, surface treatment, washing stoving, gas tightness detection and finished product warehouse entry step. The utility model discloses a high-tech means ensures that design, the manufacturing accuracy of mould are high to select suitable die-casting equipment parameter in the manufacturing of product, thereby can guarantee that the shaping product warp for a short time, make the product can realize the manufacturing in batches through magnesium alloy high pressure die-casting technology.

Drawings

FIG. 1 is a sectional view of the structure of the present invention;

FIG. 2 is a front schematic view of the present invention;

FIG. 3 is a rear view of FIG. 2;

fig. 4 is a manufacturing process diagram of the present invention.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

Fig. 1 to 4 are structural and process drawings of the present invention.

Wherein the reference numbers are: the vacuum bottom plate comprises a vacuum bottom plate body 1, a connecting hinge column 2, a shaft hole 2a, an instrument boss 3, an instrument positioning cavity 3a, a sealing clamping groove 4, an assembling through hole 5, a blind hole 6, a handle positioning groove 7, a central hole 7a, a lining hole 8 and reinforcing ribs 9.

At present, most of vacuum bottom plates for high-grade electric brushes on the market are formed by aluminum alloy materials in a die-casting mode, and the vacuum bottom plates made of the aluminum alloy materials are low in rigidity and low in safety. Therefore, the utility model provides a magnesium alloy electric brush subassembly vacuum bottom plate, this vacuum bottom plate include vacuum bottom plate body 1, and vacuum bottom plate body 1 is for adopting a magnesium alloy metalwork of high-pressure die-casting technology die-casting shaping by magnesium alloy material. The vacuum bottom plate formed by die-casting the magnesium alloy material has the advantages that the strength and the specific rigidity are superior to those of the vacuum bottom plate made of the aluminum alloy material, the vacuum bottom plate made of the magnesium alloy material has stable size, good heat dissipation and light weight, can meet the requirements of high-grade electric brushes, and has large-scale application prospect and great economic benefit.

The utility model discloses vacuum bottom plate body 1's one end shaping has two to lean out the connection hinge post 2 that extends, and the shaping has the shaft hole 2a that is used for wearing the dress round pin axle on the connection hinge post 2. In order to improve the mechanical strength of the hinge posts 2, two triangular reinforcing ribs are arranged on each hinge post 2. Vacuum bottom plate body 1's planking face, its positive shaping has a prominent instrument boss 3 that also is, is equipped with the instrument location chamber 3a that is used for the location installation instrument in this instrument boss 3, has an annular location platform in the instrument location chamber 3a, and the design has four screw holes on this annular location bench, and the screw hole is used for passing through the screw in order to make things convenient for the installation of instrument. The periphery of the upper edge of the inner plate surface of the vacuum bottom plate body 1 is also provided with a sealing clamping groove 4, and the sealing clamping groove 4 is used for clamping a sealing ring to ensure the sealing property between the vacuum bottom plate and an assembly part. Four assembling through holes 5 are formed on the vacuum bottom plate body 1 and positioned on the outer side of the sealing clamping groove 4.

In the embodiment, the utility model discloses a seven blind holes 6 of coform on the outer face of vacuum bottom plate body 1.

In the embodiment, two handle positioning grooves 7 for mounting a handle are formed on the outer plate surface of the vacuum bottom plate body 1; a center hole 7a is formed in the center of one of the two handle positioning grooves 7. And a bolt through hole is formed in each handle positioning groove 7 and used for mounting a screw to fix the handle.

In the embodiment, a bushing hole 8 for installing a threaded bushing is formed on the outer plate surface of the vacuum base plate body 1.

In the embodiment, a plurality of reinforcing ribs 9 for enhancing the mechanical strength of the vacuum bottom plate body 1 are formed on the inner plate surface of the vacuum bottom plate body 1.

The utility model also provides a manufacturing approach of magnesium alloy electric brush subassembly vacuum bottom plate, this method include mould manufacturing, product die-casting in proper order, remove material handle, plastic-blasting pretreatment, surface treatment, washing stoving, gas tightness detection and finished product warehouse entry step.

1. Step of manufacturing mold

And manufacturing a product mold by means of design software according to the product requirement.

The manufacturing method comprises the steps of firstly requiring that the product is determined by design software to be arranged in the mould, the position of the product in a mould splitting mode, the position and the shape size of a flow inlet pouring gate, the position and the shape size of an overflow port, the size number and the position distribution of a mandril and the control of the demoulding inclination of different areas. And secondly, carrying out simulation flow channel filling analysis by using a high-performance computer and intelligent analysis software, and finally correcting the design of the flow channel and the overflow port according to a simulation result and by combining actual experience.

In the manufacturing step of the die, the selection of the die material, the rigidity and the strength of the core and the ejector pins and the roughness control of different parts of the surface of the die are also required to be paid attention to, and the ejection deformation of the product is controlled to be minimum by matching the length of the ejector pins with the product. Special measures are required to be taken on the control of precision such as product molding, electrode manufacturing, die electric spark machining, matching between die parts and the like according to the requirements of size, flatness and parallelism on the product so as to meet the product precision and ensure that the cooling shrinkage deformation of the product is controlled within a reasonable range; and finally, the surfaces of the cavity and the core are smooth so as to reduce the product deformation caused by drawing.

2. Die casting step of product

Selecting a proper die casting machine in the product die casting, installing the manufactured product die into the die casting machine, then selecting proper die casting process parameters, filling a magnesium alloy liquid knockout formed by melting a magnesium alloy material into a die cavity of the product die, and maintaining the pressure of the die casting machine to obtain a product blank;

the selection of the model and the die-casting technological parameters of the die-casting machine comprises the performance of the die-casting machine, the maximum die-locking force, the injection pressure, the pressurization pressure, the quick-pressing time, the pressurization time, the pressure maintaining time, the cooling time, the selection of the release agent, the proportioning concentration of the release agent, the spraying mode, the spraying pressure and the spraying time.

The maximum mold clamping force of the die casting machine is required to meet the technological requirements so as to control the expansion modulus, and the smaller the expansion modulus is, the better the expansion modulus is actually required to be; the injection pressure, the pressurization pressure and the time are appropriately selected, and a large pressure is selected from the viewpoint of ensuring cleanliness, but an excessive pressure increases the modulus of expansion and the shrinkage deformation. The dwell time is also very important, and too short a time can aggravate the ejection deformation of the product, and too long a time can reduce the production efficiency. The selection of the release agent, the proportioning concentration and the spraying amount is also very critical, and the reasonable selection not only can facilitate the release of the mold, but also can reduce the deformation caused by the die drawing and improve the appearance quality of the product; also, the method of removing the material handle and slag ladle cannot be ignored, and improper operation can also aggravate the deformation of the product.

The utility model discloses die casting process parameters of die casting machine do: the injection time is 4 seconds; a supercharging starting position of 680 mm; the slow speed is 0.2 m/s; the second block speed is 4.7 meters per second; the specific pressure of the pressure is increased by 900 kg/square centimeter; opening the mold for 8 seconds; the material temperature is controlled to be 660 ℃.

3. Removing the material handle

And cleaning a material handle and a slag ladle carried by the product blank, and then removing the sprue, the slag ladle, the parting line and burrs on the surface of the product blank by using a punch.

4. Plastic spraying pretreatment step

And (4) sequentially polishing, dedusting and cleaning the product subjected to the step of removing the material handle, and ensuring that the surface of the product is free of oil stains.

5. Surface treatment step

The product is subjected to surface treatment in a passivation and plastic spraying mode, so that the appearance of the product is beautified.

6. Cleaning and drying step

And cleaning the surface-treated product, and drying the cleaned product by using drying equipment. In the step of cleaning and drying, the degreasing agent, the cleaning agent and the water for proportioning are utilized, and then ultrasonic cleaning is combined, so that a good cleaning effect on the product is realized.

7. Air tightness detection step

And (3) carrying out air tightness test on the dried product by taking air as a test medium, wherein the test conditions are as follows: the pressure is 0.051MPa to 0.055MPa, the aeration time is 5 seconds, the stabilization time is 10 seconds, the detection time is 5 seconds, and the leakage rate is less than or equal to 10 ml/min.

8. Finished product warehousing step

And finally inspecting the product subjected to the air tightness detection, packaging and warehousing after the product is qualified, and thus obtaining the vacuum bottom plate of the magnesium alloy electric brush assembly.

The utility model has the advantages that: the production process of the vacuum bottom plate of the electric brush assembly is realized, the magnesium alloy material with low density is adopted to replace the traditional aluminum alloy material, the strength of the product is greatly increased, the safety is improved, and the batch production and manufacturing are realized through the magnesium alloy high-pressure die-casting process. The high-tech means is adopted to ensure that the design and the manufacture of the die are high in precision, and the proper die casting equipment is selected to ensure that the formed product has small deformation; each process establishes process parameters of actual operable operation so as to be suitable for standardized production and mass production of products.

While the preferred embodiments of the present invention have been illustrated, various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention.

Claims (5)

1. Magnesium alloy electric brush subassembly vacuum bottom plate, including vacuum bottom plate body (1), characterized by: two connecting hinge columns (2) extending outwards in an inclined mode are formed at one end of the vacuum bottom plate body (1), and shaft holes (2 a) for penetrating pin shafts are formed in the connecting hinge columns (2); a protruded instrument boss (3) is formed on the outer plate surface of the vacuum bottom plate body (1), and an instrument positioning cavity (3 a) for positioning and installing a pressure gauge is arranged in the instrument boss (3); the vacuum bottom plate is characterized in that a sealing clamping groove (4) for clamping a sealing ring is formed in the inner plate surface of the vacuum bottom plate body (1) along the periphery, and four assembling through holes (5) are formed in the vacuum bottom plate body (1) on the outer side of the sealing clamping groove (4) in a co-forming mode.

2. The magnesium alloy electric brush assembly vacuum plate as claimed in claim 1, wherein: seven blind holes (6) are formed on the outer plate surface of the vacuum bottom plate body (1) in a co-molding mode.

3. The magnesium alloy vacuum base plate for an electric brush assembly as claimed in claim 2, wherein: two handle positioning grooves (7) for mounting handles are formed on the outer plate surface of the vacuum bottom plate body (1); and a central hole (7 a) is formed in the center of one handle positioning groove (7) of the two handle positioning grooves (7).

4. The magnesium alloy electric brush assembly vacuum plate as claimed in claim 3, wherein: and a lining hole (8) for mounting a threaded lining is formed on the outer plate surface of the vacuum bottom plate body (1).

5. The magnesium alloy vacuum baseplate for an electric brush assembly as claimed in claim 4, wherein: the inner plate surface of the vacuum bottom plate body (1) is provided with a plurality of reinforcing ribs (9) for enhancing the mechanical strength of the vacuum bottom plate body (1).

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