Shot blasting machine and shot blasting method

Abstract

The present invention discloses a shot blasting machine, comprising a shell with a feed channel and a shot blasting disc arranged in the shell, the shot blasting disc is connected to a rotary drive mechanism, and a plurality of shot-split areas are arranged on the shot blasting disc and are circumferentially distributed around the output shaft of the rotary drive mechanism, and a partition is provided between adjacent shot-split areas, and the inner end of the partition forms an abrasive bin, the abrasive bin connects the feed channel and the shot-split area, and the outer end of the partition is surrounded by a shielding mechanism for closing the outer end of the shot-split area, and the shielding mechanism has a notch for ejecting abrasive from the shot-split area. The present invention also discloses a shot blasting method. The ejection area of ​​the shot blasting machine and the shot blasting method of the present invention is very concentrated, which is very suitable for the processing of small workpieces and specific parts, and can greatly reduce the waste of abrasive.

Description

Technical Field

[0001] The invention relates to the field of surface treatment equipment, and in particular to a shot blasting machine and a shot blasting method. Background Art

[0002] Many parts with appearance requirements in special locations, such as mobile phone high-gloss fingerprint rings, mobile phone camera frames, smart watch frames, plastic stamping molds, various milling and drilling tools and some special-purpose parts, require surface polishing.

[0003] Shot blasting machines are commonly used in surface treatment. Sand blasting machines and shot peening machines have similar principles. Shot peening is usually used to strengthen the surface of materials. The principle is to use a high-speed rotating shot blasting disc to accelerate and throw the abrasive, and then continuously impact the surface of the workpiece at high speed, forcing the material to fall off or the microstructure of the surface of the material to change, and produce stress changes, roughness changes, etc. Traditionally used shot blasting materials are steel shots, aluminum shots, ceramic shots, walnut sand, glass beads, resin sand or corn cobs.

[0004] Among them, the shot peening machine has a concentrated beam, but it requires the supply of compressed air, which is not convenient for mobile operation, and the spraying method cannot use large-grained abrasives. Compared with the shot peening machine, the shot blasting machine is convenient for mobile operation, can use large-grained abrasives, and because the compressed air consumes a lot of energy, under the same removal efficiency, the power consumption of the shot blasting machine is only 1 / 10-1 / 6 of that of the shot peening machine. However, the beam of the shot blasting machine in the prior art is too dispersed.

[0005] Shot blasting machine in the prior art Figure 1 As shown, Figure 1 The oblique line in the figure is the projectile area of ​​the shot blasting machine. Figure 1 It can be known that the shot blasting machine in the prior art includes a guide sleeve 1a with a notch 11a, a shot wheel 2a rotatably arranged in the guide sleeve 1a and closely attached to the inner wall of the guide sleeve 1a, a blade 3a slidably arranged on the outer wall of the guide sleeve 1a, and a shot blasting disc 4a connected to both the shot wheel 2a and the blade 3a, and the outer shell shot blasting machine is provided with a shot inlet pipe (not shown) fed into the guide sleeve 1a. During operation, the projectile slides into the guide sleeve 1a from the shot inlet pipe under the action of gravity, enters the upper shot space of the shot wheel 2a, and the shot wheel 2a rotates synchronously with the blade 3a to obtain the initial velocity of the projectile. After the shot wheel 2a rotates and divides the projectile, the projectile flies out of the notch 11a of the guide sleeve 1a and enters the blade area with a higher linear velocity, and is further rotated and accelerated by the blade 3a. Under the action of centrifugal force, the projectile breaks away from the blade 3a and flies out and is projected onto the surface of the workpiece.

[0006] It can be seen from the ejection principle of the shot blasting machine in the prior art that the shot blasting machine in the prior art must have a wider ejection area. The main reason is that in the process of feeding the blades with the shot-splitting wheel, the abrasive will collide with the blades, and the abrasives will also collide and squeeze each other, and there is a large space on the blades for the abrasive to roam, resulting in a relatively large distribution range of the abrasive on the blades before it is ejected, so the range of the ejection area is also wide. According to the use requirements, the projectile requires different ejection speeds, and the ejection speed is usually adjusted by adjusting the rotation speed, but at the same time, the ejection area composed of the starting and ending positions of the ejection area and the angle thereof will also change with the change of the rotation speed. When applied to the bombardment of the surface of large parts, the wide range of the ejection area does not affect the use. It is only necessary to increase the rotation speed of the shot blasting machine to increase the ejection amount per unit time to make up for the defect of insufficient ejection density caused by the divergence of the abrasive ejection.

[0007] However, for workpieces (tools, molds, parts) used for grinding and polishing, their volume is relatively small, and the positions that need to be processed may be concentrated in a specific area on the workpiece, so the abrasive ejection area must be concentrated, and too dispersed ejection areas will cause a significant waste of efficiency. And the ejection density conforms to the normal distribution in the entire ejection area, so it is necessary to make the specific area of ​​the workpiece to be processed in the place with the largest ejection density to meet the pre-set processing requirements. At this time, if the shot blasting machine speed is increased to compensate for the insufficient ejection density when processing large workpieces, it will be very troublesome, because the starting and ending positions of the scattering area, and the ejection area composed of the angle will also change with the change of the speed. Increasing the speed of the shot blasting machine will not only further expand the waste, but also readjust the fixture to make the small workpiece located in the area with the largest ejection density. Summary of the invention

[0008] In order to overcome the problem that the projectile area of ​​the shot blasting machine in the prior art is too wide, the present invention provides a shot blasting machine.

[0009] The technical solution adopted by the present invention to solve its technical problem is:

[0010] A shot blasting machine comprises a shell with a feed channel and a shot blasting disc arranged in the shell, wherein the shot blasting disc is connected to a rotary drive mechanism, and is characterized in that the shot blasting disc is provided with a plurality of shot dividing areas circumferentially distributed around the output shaft of the rotary drive mechanism, a partition is provided between adjacent shot dividing areas, the inner end of the partition forms an abrasive bin, the abrasive bin connects the feed channel and the shot dividing area, the outer end of the partition is surrounded by a shielding mechanism for closing the outer end of the shot dividing area, and the shielding mechanism has a notch for ejecting abrasive from the shot dividing area.

[0011] As an improvement of the above solution, the shielding mechanism is a C-shaped fixing ring, with notches formed at both ends of the C-shape, and the fixing ring is fixedly arranged relative to the housing.

[0012] As an improvement of the above-mentioned scheme, the shielding mechanism includes a belt and a plurality of guide wheels for guiding the belt, wherein two guide wheels are the two ends of the notch, the belt is in close contact with the outer end of the partition, and is used to close the pill separation area between two adjacent partitions in close contact with the belt, and when the partition rotates, the belt actively or passively runs synchronously with the partition.

[0013] As an improvement of the above solution, the belt is looped around the guide wheel in a C-shape, the outer end of the partition is in close contact with the inner ring of the belt, and gaps are formed at both ends of the C-shape;

[0014] Alternatively, the multiple guide wheels include two first guide wheels and 2-4 second guide wheels, the two first guide wheels are the two ends of the gap of the shielding mechanism, and the belt is wound along one of the first guide wheels, the outer end of the partition 3, the other first guide wheel and 2-4 second guide wheels in sequence, and the second guide wheel is set at a certain distance from the partition.

[0015] As an improvement to the above solution, the guide wheels located at the upper end and / or the lower end of the notch are each connected to an adjustment mechanism for adjusting the position of the guide wheels.

[0016] As an improvement of the above solution, the shot blasting disc is an integrally formed structure;

[0017] Alternatively, the shot blasting disc comprises two side cover wheels and a plurality of partitions, and the plurality of partitions are installed between the two shot blasting discs;

[0018] Alternatively, the shot blasting disc includes a side cover wheel and an integrally formed separator wheel, the separator wheel includes a side cover portion and a plurality of separators arranged on one side of the side cover portion, and the side cover wheel is installed on the other side of the separator.

[0019] As an improvement of the above solution, the pill separation area is a straight slot hole, a circular hole or an elliptical hole.

[0020] As an improvement of the above solution, the shot separation zone radiates outward along the diameter direction of the shot blasting disc; or, the shot separation zone is offset at a certain angle to the diameter direction of the shot blasting disc, and the offset directions of multiple shot separation zones are the same.

[0021] As an improvement of the above solution, a humidifying device is further included, and the humidifying device is used to humidify the abrasive ejected toward the partition.

[0022] As an improvement of the above scheme, it also includes a material guide trough arranged along the abrasive projection direction, the material guide trough is used to collect at least part of the scattered abrasive, the humidifying device sprays the humidifying material into the material guide trough, and a recovery device is arranged below the material guide trough.

[0023] Correspondingly, the present invention also discloses a shot blasting method using the shot blasting machine described in the present invention, comprising: conveying abrasive into the abrasive bin of the shot blasting machine through a feed channel; the abrasive in the abrasive bin falls into a plurality of shot division areas under the action of gravity; different shot division areas rotate concentrically so that the abrasive is centrifuged to the outermost end of the shot division area and is blocked by a shielding mechanism, and when the shot division area rotates to the notch, the abrasive in the shot division area is thrown out.

[0024] The beneficial effects of the present invention are as follows: the present invention realizes the shot separation and accelerated ejection of abrasives through the partition part, and combines the shot separation function of the shot separation wheel and the acceleration function of the blades in the prior art. The abrasives do not have the process of flying from the shot separation wheel to the blades for redispersion and arrangement, but escape from the shot separation area in a highly concentrated state; and when the abrasives reach the gap of the shielding mechanism in the shot separation area, due to the sudden loss of the blocking of the shielding mechanism, the projectiles fly away from the shot separation wheel under the action of centrifugal force, and fly in the direction of the combined speed of the centrifugal speed and the tangential speed. In the initial stage of escaping from the shielding mechanism, the centrifugal speed is approximately zero, so the ejection speed is approximately equal to the direction of the tangential speed, so that the ejection area of ​​the shot blasting machine is very concentrated, which is very suitable for the processing of small workpieces and specific parts, and can greatly reduce the waste of abrasives. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 It is a schematic diagram of a shot blasting machine and its projectile area in the prior art;

[0027] Figure 2 It is a schematic diagram of the structure when the shielding mechanism of the present invention adopts a fixed ring;

[0028] Figure 3 It is a schematic diagram of the structure when the belt in the shielding mechanism of the present invention adopts a C-shaped loop;

[0029] Figure 4 It is a schematic diagram of the structure in which the belt in the shielding mechanism of the present invention is guided by fewer guide wheels;

[0030] Figure 5 It is a structural schematic diagram of another mode when the belt in the shielding mechanism of the present invention is guided by fewer guide wheels;

[0031] Figure 6 It is a structural schematic diagram of another mode in which the belt in the shielding mechanism of the present invention is guided by fewer guide wheels;

[0032] Figure 7 It is a schematic structural diagram of the guide wheel in the shielding mechanism of the present invention being adjusted by the adjusting mechanism;

[0033] Figure 8 It is a schematic diagram of the structure after the guide wheel at the lower right corner of the shielding mechanism of the present invention is lifted up;

[0034] Fig. 9 It is a schematic diagram of the structure of the shot blasting machine of the present invention having 20 shot distribution areas;

[0035] Fig.10 It is a structural schematic diagram of the present invention when the pill separation area adopts a straight groove;

[0036] Fig.11 It is a schematic diagram of the structure when the pill-distributing area of ​​the present invention is right-biased;

[0037] Fig.12 It is a structural schematic diagram of the present invention when the pill-distributing area is left-biased;

[0038] Fig.13 Schematic diagram of the shot blasting principle when the shot separation zone of the present invention adopts left offset and right offset;

[0039] Fig.14 It is a schematic diagram of the structure of the shot blasting machine of the present invention after the humidifying device and the material guide trough are added;

[0040] Fig.15 It is a schematic diagram of the structure of the humidifying device, the material guide trough and the recovery device of the present invention;

[0041] Fig.16 2 is a schematic diagram of the structure of the shot blasting disc of the present invention when the first embodiment is adopted;

[0042] Fig.17 2 is a schematic diagram of the structure of the shot blasting disc of the present invention when the second embodiment is adopted;

[0043] Fig.18 This is a cross-sectional view of the shot blasting disc according to the present invention in the second embodiment. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that the directional terms such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and are not specific limitations of the present invention.

[0045] Reference Figure 2 The present invention discloses a shot blasting machine, comprising a shell having a feed channel 100 and a shot blasting disc 1 arranged in the shell (the overall structure is not shown in the attached drawings). The feed channel 100 may be a structure integrally formed with the shell, or a separate structure separately mounted on the shell. The shot blasting disc 1 is connected to a rotary drive mechanism (not shown in the attached drawings), and the shot blasting disc 1 is driven to rotate by the rotary drive mechanism. The rotary drive mechanism may adopt a separate motor, or may adopt a motor-driven gear transmission, a belt transmission, or other structures.

[0046] The shot blasting disc 1 is provided with a plurality of shot-distributing areas 31 distributed circumferentially around the output shaft of the rotary drive mechanism, and a partition 3 is provided between adjacent shot-distributing areas 31, and the inner end of the partition 3 is surrounded by an abrasive bin 32, and the abrasive bin 32 is connected to the feed channel 100 and the shot-distributing area 31, and the outer end of the partition 3 is surrounded by a shielding mechanism 2 for closing the outer end of the shot-distributing area, and the shielding mechanism 2 has a gap 20 for ejecting abrasive from the shot-distributing area 31. When the shot blasting machine of the present invention is used to process the surface of a workpiece, the abrasive is transported to the abrasive bin 32 of the shot blasting machine through the feed channel 100, and the abrasive in the abrasive bin 32 falls into the plurality of shot-distributing areas 31 under the action of gravity, and the concentric rotation of different shot-distributing areas 31 causes the abrasive to centrifuge to the outermost end of the shot-distributing area and be blocked by the shielding mechanism, and when the shot-distributing area rotates to the gap, the abrasive in the shot-distributing area is ejected.

[0047] The shot blasting disc 1 of the present invention can adopt the following three embodiments:

[0048] In the first embodiment, the shot blasting disc 1 is an integrally formed structure; the shot blasting disc 1 is a disc as a whole, the shot separation area 31 and the abrasive bin 32 can be obtained by machining, and one side opening of the abrasive bin 32 is an opening connected to the feed channel. Fig.16 The shot blasting disc 1 shown is the structure of this embodiment.

[0049] In the second embodiment, the shot blasting disc 1 includes two side cover wheels and a plurality of partitions, and the plurality of partitions are installed between the two shot blasting discs, that is, the plurality of partitions are connected into a disc-shaped structure by the two side cover wheels, and the shot separation area between the partitions is closed by the cover wheels on both sides. The partition can be fixedly connected to the side cover wheels on both sides by fasteners. In this case, the partition is a separate part and is relatively easy to process, but the installation process is more complicated than that of the embodiment.

[0050] In the third embodiment, the shot blasting disc 1 includes a side cover wheel 11 and an integrally formed separator wheel 12. The separator wheel 12 includes a side cover portion 121 and a plurality of separators 3 provided on one side of the side cover portion 121. The side cover wheel 11 is installed on the other side of the separator 3. The separator wheel 12 in this embodiment can be directly obtained by mold forming. Compared with the machined shot separation area and abrasive bin in the first embodiment, the processing efficiency of this embodiment is high. Compared with the single separator installation in the second embodiment, this embodiment only needs to install the side cover wheel and the separator wheel, and its installation is relatively convenient. Fig.17 and attached Fig.18 The shot blasting disc 1 shown is the structure of this embodiment.

[0051] The pill separation area 31 is a straight slot hole, a round hole or an elliptical hole.

[0052] As attached Figure 2 As shown in the figure, the direction of abrasive escaping from the shot blasting machine can be divided into the centrifugal direction V away from the rotation center of the shot blasting disc r and the accelerated tangential direction V t , the projectile direction of the shot blaster is the combined speed direction of these two speeds.

[0053] according to Figure 1 Analyzing the ejection direction of the shot blaster in the prior art, the abrasive slides or rolls on the blade to the end of the blade until it leaves the blade. It can be seen that all the abrasives reach the linear velocity at the end of the blade, that is, the tangential direction V of all the abrasives. t It can be regarded as equal, but because the abrasive flies from the shot wheel to the blade and is redispersed and arranged, the centrifugal direction V of the abrasive at different positions when it reaches the end of the blade r The angles of the blades are not the same when the abrasive is ejected from the blade ends. These two reasons together lead to a wide ejection area of ​​the shot blasting machine in the prior art. In addition, when the speed of the shot blasting machine is increased, the greater the speed of the shot blasting machine, the greater the centrifugal direction V of the abrasive. r The larger the speed, the further away the direction of the combined velocity is from the shot blasting machine. That is, when the speed of the shot blasting machine is increased, the fixture needs to be readjusted so that the workpiece is located in the area with the highest shot density.

[0054] Then from Figure 2 Analyzing the ejection direction of the shot blasting machine of the present invention, the abrasives slide or roll on the partition 3 to the end of the partition 3 until they leave the blades. All abrasives reach the linear velocity at the end of the partition 3. The tangential direction V of all abrasives t can be regarded as equal. In the case of only a small amount of abrasive, all the abrasive has been gathered at the end of the pelletizing area 31 and blocked by the shielding mechanism 2. The centrifugal direction V r The abrasive is released and flies out only when the pelletizing area 31 enters the gap of the shielding mechanism 2. r is very small, close to zero, and the directions of almost all abrasives are consistent. Only when there are a lot of abrasives in the shot separation area 31, after the abrasives at the end of the partition 3 fly out, the subsequent abrasives have a place to reach the end of the partition 3, so that the centrifugal direction V r It cannot be regarded as zero, which forms the projection area A. Otherwise, the abrasive is ejected in a line. It can be seen that the projection beam of the shot blasting machine of the present invention is very concentrated. In addition, all the abrasives are separated from the partition 3 at the beginning of the gap of the shielding mechanism 2. The partition 3 rotates at a certain angle, which ensures that the cutting direction V t On the other hand, due to the shielding mechanism 2, the abrasive has been pre-arranged at the end of the partition 3. No matter how fast the speed of the shot blasting machine is adjusted, (when there is not much abrasive in the shot separation area 31), the abrasive is ejected in the centrifugal direction V rThey are all approximately equal to zero, that is, the projection range of the shot blasting machine at different powers is almost the same, and there is no need to adjust the position of the workpiece to be processed.

[0055] See attached Figure 3 To Attachment Fig.12 , showing shot blasting machines according to various embodiments of the present invention.

[0056] The shielding mechanism 2 of the present invention may adopt the following two structures.

[0057] The first shielding mechanism is a C-shaped fixed ring with notches formed at both ends of the C-shaped fixed ring, and the fixed ring is fixedly arranged relative to the housing. At this time, the shielding mechanism 2 is relatively stationary with respect to the ground, or relatively stationary with respect to the workpiece to be processed. This structure is relatively simple and easy to manufacture.

[0058] However, when the first shielding mechanism is used, there is the same problem as the shot blasting machine in the prior art: the shot blasting machine in the prior art can only use rigid abrasives, and cannot use elastic abrasives. Elastic abrasives are more susceptible to extrusion deformation. When the shot blasting machine in the prior art is used, it is easy to be extruded and deformed during the relative movement between the shot wheel and the guide sleeve and enter the gap. Because the abrasive particle size required for grinding and polishing is usually 0.3-2.0mm, the smaller abrasive particles themselves are easy to fall into the gap and participate in extrusion. For the soft elastic abrasive, the heat generated during the extrusion and friction process in the gap will destroy the structure of the elastic abrasive, causing it to break or the particles to fuse and adhere to the surface of the shot wheel and the guide sleeve. In severe cases, the problem of jamming will occur, making the process unsustainable. Figure 2 A similar situation also occurs between the C-shaped fixing ring and the pellet-distributing wheel 3. In order to solve this problem, the present invention proposes the following second shielding mechanism structure.

[0059] The second shielding mechanism has a structure in which shielding is achieved through a belt. Specifically, the shielding mechanism 2 includes a belt 22 and a plurality of guide wheels 21 for guiding the belt 22, wherein two guide wheels 21 are the two ends of the notch 20, and the belt 22 is in close contact with the outer end of the partition 3 and closes the pill separation area between the two adjacent partitions 3 in close contact with the belt. When the partition 3 rotates, the belt actively or passively operates synchronously with the partition. Specifically, one of the guide wheels 21 can be connected to a motor or connected to a rotating drive mechanism through a transmission mechanism, so that the belt 22 actively moves to keep up with the linear speed of the end of the partition 3; the friction between the partition 3 and the belt 22 can also be increased, and all guide wheels 21 are not driven, and the partition 3 drives the belt 22 to operate synchronously.

[0060] When the second shielding mechanism is used, since the contact portion between the belt 22 and the partition 3 is always stationary relative to the partition 3, the abrasive cannot enter between the belt 22 and the partition 3, which effectively solves the problem that the shot blaster in the prior art cannot use elastic abrasive.

[0061] As a specific implementation of the second shielding mechanism described above, the belt may be configured as a C-shaped loop structure, or may adopt other irregular structures.

[0062] As attached Figure 3 As shown, Figure 3 The disclosed belt is a C-shaped loop structure. Specifically, a plurality of guide wheels 21 are arranged in sequence along the outer circumference of the partition 3, and the belt is wound around the guide wheel 21 in a C-shaped loop. The outer end of the partition 3 is in close contact with the inner circle of the C-shaped loop belt 22, and a notch 20 is formed at both ends of the C-shape. In order to ensure that the belt fits tightly with the partition 3, this structure needs to use more guide wheels.

[0063] As attached Figures 4 to 12 The plurality of guide wheels include two first guide wheels 211 and 2-4 second guide wheels 212. The two first guide wheels 211 are the two ends of the shielding mechanism gap 20. The belt 22 is wound along one of the first guide wheels, the outer end of the partition 3, another first guide wheel and 2-4 second guide wheels in sequence. The second guide wheel is set at a certain distance from the partition to allow the belt to be stretched. The shot blaster adopting this structure can reduce the number of guide wheels, and its position does not need to be constrained near the shot dividing wheel. When the belt is tensioned, the effect of reducing the gap can also be achieved.

[0064] When the second shielding mechanism is used, the guide wheels at the upper and / or lower ends of the notch are each connected to an adjustment mechanism for adjusting the position of the guide wheels. The adjustment of the positions of the guide wheels at the upper and lower ends of the notch can change the angle between the belt and the horizontal. The change of the belt angle at the upper end of the notch can change the ejection direction of the projectile. Figure 4 and attached Figure 5 The change in the belt angle at the lower end of the notch can effectively prevent the abrasive from slipping from the shot separation area on the lower right side of the partition, such as the attached Figure 5 , Figure 6 and Figure 8 Comparison of the belt inclination angles in the lower right corner.

[0065] The guide wheel of the present invention can be adjusted by installing the position of other brackets, and the brackets are locked with screws. When the guide wheel needs to be adjusted left, right, up, or down, it is only necessary to change the position of the brackets. The guide wheel of the present invention can also be adjusted by using another adjustment mechanism, such as the attached Figure 7As shown, the adjustment mechanism may specifically include a lower adjustment mechanism 6 and an upper adjustment mechanism 7. The upper adjustment mechanism 7 adjusts the guide wheel at the upper end of the notch, which is equivalent to adjusting the ejection timing of the abrasive, that is, the ejection direction of the abrasive can be adjusted; the lower adjustment mechanism 6 is used to adjust the number of shot-discharging areas 31 exposed by the notch, and the lifting mechanism 7 is used to adjust the number of shot-discharging areas 31 exposed by the notch. Figure 7 The height of the guide wheel in the lower right corner (as shown in the figure) and the tangent position of the lifting belt 22 and the partition 3 can effectively prevent the elastic abrasive from sliding off the shot-dividing area on the lower right side of the partition. For the situation where the projectile has entered the shot-dividing area before the shot-dividing device rotates, it can prevent the abrasive from sliding onto the belt and being crushed during the subsequent rotation process. This problem mainly occurs before the machine is turned on. When the shot blasting machine is operating normally and the speed of the shot blasting disc 1 is high enough, the abrasive in the abrasive bin 32 is not centrifuged, and it is too late to fall out from the lower right corner by gravity acceleration alone. The adjustment mechanism can be a cylinder or a manually adjusted screw. Taking the screw as an example, one end of the screw is a bearing, which is rotatably connected to the rotating shaft of the guide wheel, and the other end is outside the housing of the shot blasting machine for manual twisting and adjustment.

[0066] Reference Figures 2 to 12 , the shot division areas 31 are preferably provided with 4-30. The more shot division areas 31 there are in this range, the more coherent the abrasive ejection is, and as analyzed above, if there is not much abrasive in each shot division area 31, the ejection range is more concentrated. However, if there are too many shot division areas, the abrasive in the abrasive bin 32 will not have enough time to fully enter the shot division area 31, and the abrasive in the shot division area 31 will be too little, and the polishing effect cannot be achieved. Figure 2 To Attachment Figure 8 It uses 8 pill-dividing areas, with Fig. 9 It uses 14 pill-dividing areas. Fig.11 and Fig.12 There are 11 pill division areas. Fig.10 There are 20 pill division areas used.

[0067] Refer to the attached Figures 10 to 12 The pellet separation area 31 of the present invention may adopt the following structure.

[0068] The first shot-dividing area structure: the shot-dividing area 31 radiates outward along the diameter direction of the shot-blasting disc 1. That is, the center line of the length direction of the shot-dividing area 31 is the same as the diameter direction of the shot-blasting disc. The shot-dividing area 31 of this structure is a straight groove type. This structure is convenient for processing using drill bits, milling cutters, and turning tools.

[0069] The second shot-splitting area structure: the shot-splitting area 31 is offset at a certain angle to the diameter direction of the shot-blasting disc 1, and the offset direction of multiple shot-splitting areas 31 is the same. It can be understood that the inner end of the shot-splitting area remains unchanged, and the outer end of the shot-splitting area is deflected to a certain position along the circumferential direction clockwise or counterclockwise. At this time, the center line of the length direction of the shot-splitting area 31 forms a certain angle with the diameter direction of the shot-blasting disc. Specifically, it can be right-offset type or left-offset type, attached Fig.11The shot dividing area is right-biased. At this time, the projectile area ejected can be moved away from the shot blasting machine as a whole relative to the projectile area ejected from the straight groove type shot dividing area. Fig.12 The shot separation area is left-biased. At this time, the projectile area can be moved closer to the shot blasting machine relative to the projectile area projected by the straight groove type shot separation area. The shot separation area offset method can further change the initial direction and discharge position of the shot blasting material. Fig.13 This is the principle diagram when the pill-dividing area is offset to the left and right.

[0070] See attached Fig.14 and attached Fig.15 The shot blasting machine of the present invention further comprises a humidifying device 8, which is used to humidify the abrasive ejected toward the partition 3. In addition, the shot blasting machine of the present invention further comprises a guide trough 9 arranged along the ejection direction of the abrasive, the guide trough 9 is used to collect at least part of the scattered abrasive, the humidifying device 8 sprays the humidified material into the guide trough 9, and a recovery device 10 is arranged below the guide trough 9.

[0071] As an improvement for applications with special specifications of abrasives or mirror polishing requirements, an online humidifying device 8 is added, which is sprayed, blown or pressed into the material guide groove 9 through a humidifying inlet arranged at the upper part of the material guide groove 9. The added humidifying device 8 is used to spray humidifying or lubricating substances onto the surface of the abrasive thrown by the polishing wheel. The humidified lubricating substance and the adhesive in the abrasive are fused to form an elastic substance, thereby changing the friction coefficient of the abrasive surface or directly affecting the friction coefficient, so as to improve the polishing effect. The formed elastic substance helps to form a new elastic layer on the surface of the abrasive passing therethrough. The reason is that after being idle for a long time or used many times, the elastic layer on the surface of the soft elastic abrasive will be removed or consumed or air-dried and lose its elasticity, thereby reducing the mirror effect of polishing. Specifically, the humidifying material can be water, a mixture of water and oil, acetic acid, glycerol, or a mixture of acetic acid and glycerol, etc., which has a surface lubrication function or a surface wetting function. The wetting material enters the guide trough 9 in the form of atomized particles. The atomization method can be to produce micron-level atomized particles through an atomizer containing an ultrasonic vibrator, or to use a water pump to directly produce high-pressure liquid + atomizing nozzle, or to use compressed air + high and low pressure water pipes + atomizing nozzles to work together. The humidification amount can be adjusted according to factors such as process requirements, raw material differences, and discharge amount, and the adjustment range is between 10ml / (hour*kg)-2000ml / (hour*kg). The excess unconsumed wetting material is collected by the return water port at the bottom of the guide trough 9.

[0072] Accordingly, the present invention also discloses a shot blasting method using the shot blasting machine of the present invention, which comprises:

[0073] S1. The abrasive is transported to the abrasive bin of the shot blasting machine through the feed channel.

[0074] S2. The abrasive in the abrasive bin falls into multiple shot-forming areas under the action of gravity.

[0075] S3. The different shot-dividing areas rotate concentrically to make the abrasive centrifugal to the outermost end of the shot-dividing area and blocked by the shielding mechanism. When the shot-dividing area rotates to the notch, the abrasive in the shot-dividing area is thrown out.

[0076] The present invention realizes the shot separation and accelerated ejection of abrasives through a partition, which can be regarded as lengthening the shot separation wheel of the shot blasting machine in the prior art to replace the blades, and merging the shot separation function of the shot separation wheel and the acceleration function of the blades in the prior art. The abrasives do not have the process of flying from the shot separation wheel to the blades for redispersion and arrangement, but escape from the shot separation area in a highly concentrated state; and when the abrasives reach the gap of the shielding mechanism in the shot separation area, due to the sudden loss of the blocking of the shielding mechanism, the projectiles fly away from the shot separation wheel under the action of centrifugal force, and fly in the direction of the combined speed of the centrifugal speed and the tangential speed. In the initial stage of escaping from the shielding mechanism, the centrifugal speed is approximately zero, so the ejection speed is approximately equal to the direction of the tangential speed, so that the ejection area of ​​the shot blasting machine is very concentrated, which is very suitable for processing small workpieces and specific parts, and can greatly reduce the waste of abrasives.

[0077] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A shot blasting machine, comprising a housing having a feed channel and a shot blasting disc arranged in the housing, wherein the shot blasting disc is connected to a rotation driving mechanism, characterized in that: The shot blasting disc is provided with a plurality of shot-blasting areas distributed around the circumference of the output shaft of the rotating drive mechanism, a partition is formed between adjacent shot-blasting areas, the inner end of the partition forms an abrasive bin, the abrasive bin connects the feed channel and the shot-blasting area, the outer end of the partition is surrounded by a shielding mechanism for closing the outer end of the shot-blasting area, the shielding mechanism has a gap for the shot-blasting area to eject abrasive, the shielding mechanism comprises a belt and a plurality of guide wheels for guiding the belt, the belt is looped around the guide wheel, and the gap is formed at both ends of the belt, wherein two guide wheels are the two ends of the gap, the inner ring of the belt is in close contact with the outer end of the partition, and is used to close the shot-blasting area between two adjacent partitions in close contact with the belt, when the partition rotates, the belt actively or passively runs synchronously with the partition, and the portion of the belt in contact with the partition is always stationary relative to the partition.

2. The shot blasting machine according to claim 1, characterized in that: The belt is a C-shaped loop structure. The multiple guide wheels are arranged in sequence along the outer circumference of the partition, and the multiple guide wheels include two first guide wheels and 2-4 second guide wheels, the two first guide wheels are the two ends of the notch, and the belt is wound along one of the first guide wheels, the outer end of the partition, another first guide wheel and 2-4 second guide wheels in sequence, and the second guide wheel is set at a certain distance from the partition to allow the belt to be stretched.

3. The shot blasting machine according to claim 1 or 2, characterized in that: The shot blasting disc is an integrally formed structure; Alternatively, the shot blasting disc comprises two side cover wheels and a plurality of partitions, and the plurality of partitions are installed between the two shot blasting discs; Alternatively, the shot blasting disc includes a side cover wheel and an integrally formed separator wheel, the separator wheel includes a side cover portion and a plurality of separators arranged on one side of the side cover portion, and the side cover wheel is installed on the other side of the separator.

4. The shot blasting machine according to claim 1 or 2, characterized in that: The pill-distributing area is a straight slot hole, a round hole or an elliptical hole.

5. The shot blasting machine according to claim 1 or 2, characterized in that: The shot-split zones radiate outwardly along the diameter direction of the shot-blasting disc; or, the shot-split zones are offset at a certain angle to the diameter direction of the shot-blasting disc, and the offset directions of the plurality of shot-split zones are the same.

6. The shot blasting machine according to claim 1 or 2, characterized in that: The shot blasting machine further comprises a humidifying device, which is used for humidifying the abrasive ejected toward the partition.

7. The shot blasting machine according to claim 6, characterized in that: The shot blasting machine also includes a material guide trough arranged along the abrasive projection direction, the material guide trough is used to collect at least part of the scattered abrasive, the humidifying device sprays the humidifying material into the material guide trough, and the shot blasting machine is also provided with a recovery device below the material guide trough.

8. A shot blasting method using the shot blasting machine according to any one of claims 1 to 7, characterized in that: include: The abrasive is transported to the abrasive bin of the shot blasting machine through the feed channel; the abrasive in the abrasive bin falls into multiple shot separation areas under the action of gravity; The concentric rotation of different shot-dividing areas causes the abrasive to centrifugally move to the outermost end of the shot-dividing area and be blocked by the shielding mechanism. When the shot-dividing area rotates to the notch, the abrasive in the shot-dividing area is thrown out.

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