CN203003611U - Abrasive flow spewing-typed buffing device based on tool navigation - Google Patents

Abstract

The utility model provides a tool-guided abrasive flow gushing polishing device, which includes a polishing guide tool, a spindle mechanism and an abrasive flow mechanism; the polishing guide tool includes a hollow pipe with an open top and a hemispherical bottom , the bottom end of the hollow pipe is provided with several uniformly distributed fine grooves; the main shaft mechanism includes a housing, and a hollow main shaft, a shaft sleeve, a rotor, a stator and a bearing installed in the housing; the abrasive flow mechanism Including tank, agitator, dust absorber, pump, one-way pressure regulating valve, recovery tank and piping. The polishing guide tool described in the utility model does not touch the workpiece, and the abrasive flow is spewed out from the inside of the polishing guide tool through the slit on the ball head, and the free-form surface of the mold is polished by the abrasive flow, because the polishing of the abrasive flow Good performance, so it is not affected by changes in the curvature of the surface. It has the advantages of simple structure, high degree of polishing automation, high and stable polishing quality and the like.

Description

Abrasive jet spout polishing device based on tool guidance

technical field

The utility model belongs to the field of mold polishing, in particular to a tool-guided abrasive grain flow gushing type polishing device.

Background technique

As users have higher and higher requirements for the surface quality of molded products (such as mobile phone shells, car lights, and home appliance shells, etc.), mold manufacturers must further improve the surface quality of mold cavities to meet people's needs. This is because the mold The surface quality of molded products mainly depends on the surface quality of the mold cavity. Improving the surface quality of the mold cavity not only makes the workpiece more beautiful, but also enhances the corrosion resistance and wear resistance, makes the molded product easy to demould, and reduces the risk of cracks and shedding due to local overload. Most mold cavities are free-form surfaces. In order to obtain mirror-level mold cavity surfaces, subsequent finishing (mainly polishing) has become an essential and important process. At present, mold free-form surface polishing is mainly done by hand, which is not only inefficient ( It takes about 40%-50% of the entire mold manufacturing time), labor-intensive, and it is difficult to ensure surface accuracy and stable polishing quality. In view of the shortcomings of manual polishing, such as low efficiency, low quality and high cost, it is of great significance to study efficient and high-quality automatic polishing methods and devices for mold free-form surfaces to improve mold manufacturing efficiency and quality.

Researchers at home and abroad have studied many polishing methods and devices, such as mechanical polishing methods and devices: mainly using polishing wheels, polishing shafts and polishing wheels for polishing, magnetorheological polishing methods and devices: mainly using magnetorheological fluid to flow through the mold Surface polishing, in addition to airbag polishing, ultrasonic polishing, ultrasonic-electrochemical (electrolytic) polishing, electrochemical (electrolytic) polishing, electrochemical (electrolytic)-mechanical composite polishing, magnetic-electrolytic mechanical composite polishing, etc. Among these methods and devices, some can be used for mold free-form surface polishing, but there are also defects such as low degree of automation, need for manual assistance, low efficiency, high labor intensity, difficulty in ensuring surface accuracy and stable polishing quality; and others Some methods and devices have not been well applied in the free-form surface polishing of molds due to factors such as relatively complicated equipment, pollution to the environment, and difficulty in controlling the flow of liquid.

Utility model content

The utility model aims at the deficiencies of the above-mentioned prior art, and provides a tool-guided abrasive flow spouting polishing device with high degree of automation, high efficiency and low cost.

The utility model is achieved through the following technical solutions:

A tool-guided abrasive flow gushing polishing device, comprising a polishing guide tool, a spindle mechanism and an abrasive flow mechanism;

The polishing guide tool includes a hollow pipe with an open top and a hemispherical bottom, and a number of evenly distributed fine grooves are arranged at the bottom of the hollow pipe;

The main shaft mechanism includes a housing, and a hollow main shaft installed in the housing, a shaft sleeve, a rotor, a stator and a bearing; the housing is connected with a multi-axis linkage CNC machine tool, and the hollow main shaft communicates with a hollow pipe of a polishing guide tool The shaft sleeve is installed on the middle part of the outer cylindrical surface of the hollow main shaft, the bearings are installed on both ends of the outer cylindrical surface of the hollow main shaft, the rotor is installed on the shaft sleeve, and the stator is installed on the shell.

The abrasive particle flow mechanism includes a box body, an agitator, a wear debris adsorber, a pump, a one-way pressure regulating valve, a recovery box and a connecting pipeline; the recovery box, the box body, the pump and the one-way pressure regulating valve are connected in sequence through the connecting pipeline An abrasive particle flow channel is formed; the agitator and the abrasive particle adsorber are both arranged in the box; the end of the abrasive particle flow channel communicates with the hollow main shaft of the main shaft mechanism.

The preferred setting of the utility model is: the hollow main shaft in the main shaft mechanism is connected with the hollow pipe in the polishing guide tool through bolts.

The preferred setting of the utility model is: an O-shaped sealing ring is arranged at the joint between the hollow main shaft and the hollow pipe.

The preferred setting of the utility model is that: the upper and lower ends of the housing are provided with an end cover, and the end cover is connected with the housing through bolts.

The preferred setting of the utility model is that: the box is in the shape of a truncated cone.

The preferred setting of the present utility model is that: the agitator is an agitator with a four-tooth upward-inclining structure.

The preferred setting of the present utility model is that: the wear dust absorber includes a shell, and a helical coil and an iron core arranged in the shell.

The preferred setting of the utility model is that: the bottom of the box body is provided with a plug.

In the tool-guided abrasive flow spouting polishing device described in the utility model, during the polishing process, the abrasive flow fills the hollow pipe and spews out through the fine grooves at the lower end, and the polishing guide tool rotates with the hollow main shaft. The high-speed rotation drives the abrasive particle flow gushing out from the fine groove to move tangentially along the hemispherical surface to form a high-speed rotating abrasive field. The hemispherical surface of the polishing guide tool always maintains a certain distance from the free-form surface of the mold to be polished. The fine abrasive particles in the grain field rotate at high speed and hit the micro-nano protrusions on the free surface of the mold. Under the action of micro force and micro grinding of the fine abrasive particles, the free curved surface of the mold is gradually smoothed to obtain a mirror-level surface finish.

The polishing guide tool described in the utility model does not touch the workpiece, and the abrasive grain flow spews out from the inside of the polishing guide tool through the slit on the ball head, and polishes the free-form surface of the mold through the abrasive grain flow, because the polishing of the abrasive grain flow Good performance, so it is not affected by changes in the curvature of the surface. For free-form surfaces with large curvature changes, the polishing guide tool with a more suitable radius of the ball head can be replaced. Under the guidance and rotation of the guide tool, the abrasive grain flow forms a controllable rotating abrasive grain field. Different parameters such as flow pressure, distance between the guide tool and the polished surface, and polishing time can be obtained to obtain different polishing quality and efficiency. It has the advantages of simple structure, high degree of polishing automation, high and stable polishing quality, etc.

In the traditional grinding wheel polishing method, the grinding wheel directly contacts the surface of the workpiece. It is difficult to polish the free-form surface with large curvature changes, and the polished surface of the grinding wheel cannot reach the mirror level, so it can only be used for rough polishing. However, the utility model can perform ultra-precision polishing, and the polished surface can reach the mirror level.

In the traditional flexible airbag polishing method, the flexible airbag is in contact with the surface of the workpiece to be polished. Under the action of contact pressure, abrasive grains are difficult to store in the contact area, so the polishing efficiency is low. However, the polishing guide tool used in the utility model does not contact the surface of the tool being thrown, so the efficiency is higher.

Description of drawings

Fig. 1 is the three-dimensional structural view of the tool-guided abrasive flow spouting polishing device according to the present invention;

2 is a front view of a tool-guided abrasive flow spouting polishing device;

Fig. 3 is a structural diagram of a polishing guide tool;

Fig. 4 is the structural diagram of main shaft mechanism;

Fig. 5 is a structural diagram of the abrasive flow mechanism;

The meanings of the symbols in the figure are:

Polishing guide tool 1, spindle mechanism 2, abrasive flow mechanism 3, hollow pipe 11, fine groove 12, opening connection part 13, bolt mounting hole 14, sealing ring groove 15, housing 21, hollow spindle 22, shaft sleeve 23, Rotor 24, stator 25, bearing 26, end cover 27, bolt 28, box 31, agitator 32, wear dust absorber 33, pump 34, one-way pressure regulating valve 35, recovery box 36, connecting pipe 37, plug 38.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

As shown in Figures 1 and 2, the utility model provides a tool-guided abrasive flow spouting polishing device, including a polishing guide tool 1, a spindle mechanism 2 and an abrasive flow mechanism 3;

As shown in Figure 3, the polishing guide tool includes a hollow pipe 11 with a top opening and a hemispherical bottom end, and the bottom end of the hollow pipe 11 is provided with several evenly distributed fine grooves 12; during the polishing process, The hollow pipe 11 is used as the abrasive flow channel, and the abrasive flow gushes out through these fine grooves 12 to form an abrasive field and realize the polishing process of the free-form surface of the mold. The top opening is provided with an opening connecting part 13, and a plurality of bolt installation holes 14 are arranged on the opening connecting part 13. The opening connecting part 13 is connected to the main shaft mechanism 2 through a plurality of bolts. In order to prevent the leakage of the abrasive flow, an O-shaped The sealing ring is sealed, so a sealing ring groove 15 is designed on the end face.

As shown in Figure 4, the main shaft mechanism 2 includes a housing 21, and a hollow main shaft 22 installed in the housing 21, a shaft sleeve 23, a rotor 24, a stator 25 and a bearing 26; the housing 21 is linked with a multi-axis The CNC machine tool is connected, and the inner hole of the hollow main shaft 22 is used as an abrasive flow channel, which communicates with the hollow pipe 11 of the polishing guide tool 1; the sleeve 23 is installed on the middle part of the outer cylindrical surface of the hollow main shaft 22, so The bearings 26 are mounted on both ends of the outer cylindrical surface of the hollow main shaft 22 , the rotor 24 is mounted on the shaft sleeve 23 , and the stator 25 is mounted on the casing 21 . The stator 25 is composed of coils, and generates a magnetic field after electrification, which drives the rotor 24 to rotate, and when the rotor 24 rotates, it drives the hollow main shaft 22 to rotate together. Bearing 26 is used for supporting hollow main shaft 22, and can reduce frictional force when rotating simultaneously, so as not to generate too much heat. The housing 21 is used to support and contain the hollow main shaft 22 and other parts, and is connected with the slide plate of the CNC machine tool, so that it can be installed on the multi-axis linkage CNC machine tool for polishing the free-form surface of the mold. In order to prevent external impurities from entering the main shaft and prevent bearing grease from leaking, the end of the housing 21 is provided with an end cover 27 and an O-ring. At the same time, the housing 21 securely connects adjacent parts that need to be connected through a plurality of connecting bolts 28 .

The main functions of the spindle mechanism 2 are: first, the lower end of the hollow spindle 22 is used to fix the polishing guide tool 1; second, the abrasive flow sent by the abrasive flow device is sent to the polishing guide tool 1; third, the stator 25 is energized Finally, a rotating magnetic field is generated to drive the rotor 24 to rotate, and then to drive the hollow main shaft 22 to rotate together. The hollow main shaft 22 drives the polishing guide tool 1 installed at its lower end to rotate together. In the grain field, the micro-nano abrasive grains in the rotating abrasive grain field can perform micro-force and micro-grinding on the free-form surface of the mold, and finally realize the gradual smoothing of the free-form surface of the mold.

As shown in Figure 5, the abrasive particle flow mechanism 3 includes a casing 31, an agitator 32, an abrasive debris adsorber 33, a pump 34, a one-way pressure regulating valve 35, a recovery tank 36 and a connecting pipeline 37; recovery tank 36, The casing 31, the pump 34 and the one-way pressure regulating valve 35 are sequentially connected through the connecting pipe 37 to form an abrasive flow channel; the agitator 32 and the abrasive dust absorber 33 are all arranged in the casing 31; the abrasive flow The end of the flow channel communicates with the hollow main shaft 22 of the main shaft mechanism 2 . The box 31 adopts a truncated conical structure with a large upper end and a small lower end, so that abrasive debris generated by polishing can be deposited on the bottom of the truncated conical box. The agitator 32 adopts a four-tooth upward-sloping structure, which can make the flow of abrasive grains roll upwards and rotate around the vertical axis during rotation and agitation, so that the agitation is more uniform. The wear debris adsorber 33 is composed of a spiral coil, an iron core and a shell. After the coil is energized, a magnetic field will be generated to absorb the wear debris generated by polishing, so as to maintain the components of the abrasive flow. The spiral structure is more suitable for adsorption Wear debris; the iron core can enhance the magnetic field, and the shell adopts a spiral structure to ensure a larger surface area and make it easier for wear debris to adhere to its surface. The bottom of the casing 31 can also be provided with a plug 38, which is screwed into the discharge port for blocking during normal operation, and the plug 38 is unscrewed for discharging the abrasive flow when the abrasive flow needs to be replaced. The pump 34 is used to deliver the abrasive grain flow from the box body 31 to the connecting pipe 37. The pressure and flow rate of the abrasive grain flow can be adjusted, and the abrasive grain flow reaches the polishing guide tool 1 through the hollow main shaft 22, and finally passes through the fine groove of the polishing guide tool 1. 12 spout out to form a rotating abrasive grain field. The one-way pressure regulating valve 35 is installed in the connecting pipe 37, and is used to prevent the abrasive grain flow from flowing backward, and at the same time maintain a certain pressure on the abrasive grain flow in the connecting pipe 37. The recovery box 36 is used to prevent the abrasive grain flow from splashing and overflowing, and after being collected, it is transported back to the box body 31 through the connecting pipe 37 .

The working principle of the tool-guided abrasive flow spouting polishing device described in the utility model is as follows:

The abrasive grain flow fills the hollow pipe 11 and spews out through the fine groove 12 at the lower end. The polishing guide tool 1 rotates at a high speed with the rotation of the hollow main shaft 22, driving the abrasive grain flow gushing out of the fine groove 12 along the hemispherical surface. The hemispherical surface of the polishing guide tool keeps a certain distance from the free-form surface of the mold to be polished, and the fine abrasive particles in the abrasive field rotate at high speed and hit the micro-nano convex surface on the free-form surface of the mold. From the beginning, under the micro-force and micro-grinding action of the micro-fine abrasive grains, the free-form surface of the mold is gradually smoothed to obtain a mirror-level surface finish.

The above are preferred embodiments of the utility model, and all equivalent changes made according to the patent scope of the utility model shall belong to the protection scope of the utility model.

Claims (8)

1. the abrasive Flow flowing type sit burnishing device based on instrument guiding, is characterized in that, comprises polishing steering tool, mainshaft mechanism and abrasive Flow mechanism;

Described polishing steering tool comprises that a top end opening, bottom are hemispheric hollow pipe, and the bottom of described hollow pipe is provided with several equally distributed fine grooves;

Described mainshaft mechanism comprises housing, and is arranged on hollow spindle, axle sleeve, rotor, stator and bearing in housing; Described housing is connected with multi-shaft linkage numerical control machine, and described hollow spindle is communicated with the hollow pipe of polishing steering tool; Described axle sleeve is arranged on the external cylindrical surface mid portion of hollow spindle, and described bearing is arranged on the external cylindrical surface two end portions of hollow spindle, and described rotor is arranged on axle sleeve, and described stator is arranged on housing.

Described abrasive Flow mechanism comprises casing, agitator, abrasive dust absorber, pump, one-way pressure regulating valve, collection box and connecting pipe; Collection box, casing, pump and one-way pressure regulating valve are communicated with formation abrasive Flow runner successively by connecting pipe; Described agitator and abrasive dust absorber all are arranged in casing; The end of described abrasive Flow runner is communicated with the hollow spindle of mainshaft mechanism.

2. the abrasive Flow flowing type sit burnishing device based on the instrument guiding according to claim 1, is characterized in that, the hollow pipe in the hollow spindle in mainshaft mechanism and polishing steering tool is bolted.

3. the abrasive Flow flowing type sit burnishing device based on the instrument guiding according to claim 2, is characterized in that, the junction of hollow spindle and hollow pipe is provided with the O RunddichtringO.

4. the abrasive Flow flowing type sit burnishing device based on the instrument guiding according to claim 1, is characterized in that, the two ends up and down of described housing are provided with an end cap, and described end cap is connected with housing by bolt.

5. the abrasive Flow flowing type sit burnishing device based on the instrument guiding according to claim 1, is characterized in that, described casing is the truncated cone-shaped structure.

6. the abrasive Flow flowing type sit burnishing device based on instrument guiding according to claim 1, is characterized in that, described agitator is the tilt agitators of structure of four teeth directionals.

7. the abrasive Flow flowing type sit burnishing device based on the instrument guiding according to claim 1, is characterized in that, described abrasive dust absorber comprises shell, and in the enclosure spiral coil and iron core are set.

8. the abrasive Flow flowing type sit burnishing device based on the instrument guiding according to claim 1, is characterized in that, the bottom of described casing is provided with a plug.

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