CN114393521A - Crawler-type shot blasting machine for polishing steel castings - Google Patents

Crawler-type shot blasting machine for polishing steel castings Download PDF

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Publication number
CN114393521A
CN114393521A CN202210021769.6A CN202210021769A CN114393521A CN 114393521 A CN114393521 A CN 114393521A CN 202210021769 A CN202210021769 A CN 202210021769A CN 114393521 A CN114393521 A CN 114393521A
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China
Prior art keywords
driven roller
shell
roller
rubber belt
low
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Withdrawn
Application number
CN202210021769.6A
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Chinese (zh)
Inventor
钟琦文
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Individual
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Individual
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Priority to CN202210021769.6A priority Critical patent/CN114393521A/en
Publication of CN114393521A publication Critical patent/CN114393521A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00Abrasive blasting machines or devices; Plants
    • B24C3/08Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces
    • B24C3/083Transfer or feeding devices; Accessories therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/08Methods 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00Abrasive blasting machines or devices; Plants
    • B24C3/08Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces
    • B24C3/10Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces for treating external surfaces
    • B24C3/14Apparatus using impellers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

The invention relates to the technical field of automatic processing of steel, and discloses a crawler-type shot blasting machine for polishing a steel casting, which comprises a shell, wherein partition plates are arranged on two sides of the interior of the shell, a driving roller, a high driven roller and a low driven roller are connected onto the partition plates in a rotating manner, rubber belts are connected onto the driving roller, the high driven roller and the low driven roller, and the driving roller, the high driven roller and the low driven roller form a triangle. According to the invention, the side lifting device is utilized to push one end of the high driven roller and one end of the low driven roller to move up and down respectively after the polishing of the workpiece is finished, and the inclination of the rubber belt can be realized by matching the elastic performance and the non-tight state of the rubber belt, so that the polished workpiece and the pre-polished workpiece are both unloaded from the rubber belt, a new workpiece is loaded on the rubber belt between the high driven roller and the low driven roller again, and the pre-polished workpiece is loaded on the rubber belt between the driving roller and the high driven roller, thereby realizing the function of continuously polishing the workpiece.

Description

Crawler-type shot blasting machine for polishing steel castings
Technical Field
The invention relates to the technical field of automatic processing of steel, in particular to a crawler-type shot blasting machine for polishing a steel casting.
Background
The crawler-type shot blasting machine is a machine capable of cleaning different types of steel castings. The workpiece is turned over on a rubber belt with a discharge hole in the shot blasting chamber, and shot materials are thrown to the casting by the shot blasting device. The motor drives the reducer to drive the rubber belt to transmit, and the pills fall into the spiral feeder through the discharge hole on the rubber belt.
The conventional crawler-type shot blasting machine needs manual single-time feeding, namely after one-time polishing, the rubber belt needs to be reversely conveyed, so that workpieces on the rubber belt are unloaded, and then the workpieces are manually placed on the rubber belt, so that the loading and unloading of the workpieces are very time-consuming, and the polishing efficiency is low; in addition, the existing crawler-type shot blasting machine only places a workpiece on the uppermost rubber belt, and after the shot materials impact the workpiece on the uppermost rubber belt, the shot materials can fall into a shot hopper below the rubber belt through two layers of rubber belts, and the shot materials on the lower rubber belt cannot contact with the workpiece, so that the polishing function of the shot materials falling on the lower rubber belt is wasted; in addition, in the existing crawler-type shot blasting machine, the rubber belt is a consumable part, but only one side surface of the rubber belt is in contact with the workpiece, so that the workpiece is supported, the rubber belt is discarded after the surface of the rubber belt is rubbed and smoothed, and the other side surface of the rubber belt is not used, so that the utilization rate of the rubber belt is not maximized, and the cost required by polishing is increased to a certain extent.
Disclosure of Invention
Aiming at the defects of the prior crawler-type polishing machine in the use process, the invention provides the crawler-type shot blasting machine for polishing the steel castings, which has the advantages of high rubber belt utilization rate, high polishing efficiency and automatic workpiece filling, and solves the problems in the prior art.
The invention provides the following technical scheme: a crawler-type shot blasting machine for polishing steel castings comprises a shell, wherein partition plates are arranged on two sides of the interior of the shell, a driving roller, a high driven roller and a low driven roller are connected to the partition plates in a rotating mode, rubber belts are connected to the driving roller, the high driven roller and the low driven roller, the driving roller, the high driven roller and the low driven roller form a triangle, workpieces located between the driving roller and the high driven roller and between the high driven roller and the low driven roller are placed on the rubber belts, a side lifting device is connected to one end of the high driven roller and one end of the low driven roller, the side lifting device is located on one side, far away from the center of the shell, a baffle plate is arranged in the shell, a piece conveying device is arranged between the baffle plate and the shell, and blocking piece covers are arranged at the positions of the driving roller and the high driven roller.
Preferably, a discharge hole close to the high driven roller is formed in the outer wall of the partition plate, the discharge hole is slightly lower than the top surface of the high driven roller in a horizontal state, and a discharge belt is installed below the discharge hole.
Preferably, a quantitative storage box is installed on the outer wall of the shell, a quantitative feeding pipe is connected to the bottom end of the quantitative storage box, the quantitative feeding pipe is communicated with the upper portion of a rubber belt connected between a high driven roller and a low driven roller in the cavity of the shell, a sand outlet is formed in the rubber belt, and the sand outlet is conical.
Preferably, the outer wall of the partition plate is provided with a sliding chute, the rotating shafts of the high driven roller and the low driven roller are sleeved in the inner part of the sliding chute in a movable mode, the rotating shafts of the high driven roller and the low driven roller are sleeved with sliding rings, one side of each sliding ring is fixedly connected with a transverse plate, and the transverse plates are connected to the driving end of the side lifting device.
Preferably, the side lifting device comprises a shielding cover, permanent magnets, a driving rod and an electromagnet, the shielding cover is columnar, the number of the permanent magnets is two, the permanent magnets are respectively located at two ends of the shielding cover, the driving rod is fixedly connected to one end, away from the inner cavity of the shielding cover, of the permanent magnet, the driving rod penetrates through the side wall of the shielding cover and extends to the outer side of the shielding cover, the two shielding covers are respectively connected with two transverse plates, and the electromagnet is located at the center of the shielding cover.
Preferably, a device is transported including a mouth, income piece mouth, conveyer belt, fixed plate and a fortune motor, a mouth is located on the baffle and is located between high driven voller and the low driven voller, the mouth is located on the baffle and is located between drive roll and the high driven voller, the conveyer belt transmission is connected between the inner wall of baffle and shell, the both sides of conveyer belt and the inner wall in close contact with of shell, baffle, fixed plate fixed connection is on the surface of conveyer belt, the conveyer belt slope is towards one side of shell inner chamber, a fortune motor is used for driving the conveyer belt and removes.
The invention has the following beneficial effects:
1. according to the invention, the side lifting device is utilized to push one end of the high driven roller and one end of the low driven roller to move up and down respectively after the polishing of the workpiece is finished, and the inclination of the rubber belt can be realized by matching the elastic performance and the non-tight state of the rubber belt, so that the polished workpiece and the pre-polished workpiece are both unloaded from the rubber belt, a new workpiece is loaded on the rubber belt between the high driven roller and the low driven roller again, and the pre-polished workpiece is loaded on the rubber belt between the driving roller and the high driven roller, thereby realizing the function of continuously polishing the workpiece.
2. According to the invention, the workpiece is placed on the rubber belt between the high driven roller and the low driven roller, the workpiece is pre-polished by utilizing the contact between the shot blasting abrasive and the workpiece, and two side surfaces of the rubber belt can be simultaneously used, so that the utilization rate of the rubber belt is improved, and the polishing cost is reduced.
3. According to the invention, the workpiece to be polished is conveyed to the rubber belt between the driving roller and the high driven roller through the workpiece conveying device, the workpiece can be directly loaded onto the rubber belt by utilizing the inclined workpiece conveying device, two functions of conveying and dumping the workpiece are realized, a mode of stopping and manually loading materials is avoided, and the efficiency of the polishing process is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of the side lift apparatus of the present invention;
FIG. 3 is a schematic view of the connection of the rubber belt of the present invention;
FIG. 4 is a schematic view of a portion of the present invention;
FIG. 5 is a left side partial elevational view of the housing of the present invention;
fig. 6 is a right side partial elevation view of the housing of the present invention.
In the figure: 1. a housing; 2. a partition plate; 3. a drive roll; 4. a high driven roller; 5. a low driven roller; 6. a side lift device; 601. a shield case; 602. a permanent magnet; 603. a drive rod; 604. an electromagnet; 7. a baffle plate; 8. a piece conveying device; 801. a workpiece outlet; 802. a workpiece inlet; 803. a conveyor belt; 804. fixing a plate; 805. a workpiece conveying motor; 9. a quantitative material storage box; 901. a quantitative feeding pipe; 10. a discharge port; 11. a discharge belt; 12. a rubber belt; 1201. a sand outlet; 13. a stopper cover; 14. a slip ring; 15. a transverse plate; 16. a chute.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a crawler type shot blasting machine for polishing a steel casting comprises a housing 1, partition plates 2 are arranged on two sides of the interior of the housing 1, a driving roller 3, a high driven roller 4 and a low driven roller 5 are connected to the partition plates 2 in a rotating manner, rubber belts 12 are connected to the driving roller 3, the high driven roller 4 and the low driven roller 5, the driving roller 3, the high driven roller 4 and the low driven roller 5 form a triangle, the driving roller 3 is connected with a driving roller motor, not shown in the figure, the driving roller motor drives the driving roller 3 to rotate, the high driven roller 4 and the low driven roller 5 are driven to rotate through the connection of the rubber belts 12, workpieces located between the driving roller 3 and the high driven roller 4 and between the high driven roller 4 and the low driven roller 5 are placed on the rubber belts 12, referring to fig. 3, the workpieces located between the driving roller 3 and the high driven roller 4 move to the right side and then turn over, and the workpieces located between the high driven roller 4 and the low driven roller 4, The workpiece between the lower driven rollers 5 is moved to the left and then reversed. In addition, a shot blasting device is arranged above the rubber belt 12 between the driving roller 3 and the high driven roller 4, and abrasive materials are thrown to the workpiece between the driving roller 3 and the high driven roller 4, so that the workpiece is polished; a sand outlet 1201 is formed in the rubber belt 12, abrasive falls onto the rubber belt 12 between the high driven roller 4 and the low driven roller 5 through the sand outlet 1201, and is stirred to be in contact with a workpiece when the rubber belt 12 is used for transmission, so that the workpiece is pre-polished; the sand outlet 1201 is conical, so that the sand outlet 1201 at the rubber belt 12 between the driving roller 3 and the high driven roller 4 is large at the top and small at the bottom, and the sand outlet 1201 at the rubber belt 12 between the high driven roller 4 and the low driven roller 5 is large at the top and small at the bottom, so that the abrasive can be slowed down from falling off the rubber belt 12 at the position, the contact time of the workpiece and the abrasive is longer, and the pre-polishing effect on the workpiece is improved, because when the abrasive falls off from the rubber belt 12 above to the rubber belt 12 below, the speed of the abrasive is small, the polishing effect on the workpiece is not enough through impact, and the pre-polishing effect is achieved by prolonging the contact stirring time of the workpiece and the abrasive.
Referring to fig. 3, the driving roller 3 and the high driven roller 4 are provided with baffle shields 13, and the baffle shields 13 are used for preventing the workpieces from impacting the high driven roller 4 and the low driven roller 5 when moving
Referring to fig. 1 and 5, one end of the high driven roller 4 and one end of the low driven roller 5 are connected with a side lifting device 6, the side lifting device 6 is located on one side of the partition board 2 far away from the center of the housing 1, referring to fig. 2, the side lifting device 6 comprises a shielding cover 601, a permanent magnet 602, a driving rod 603 and an electromagnet 604, the shielding cover 601 is in a column shape, the number of the permanent magnets 602 is two and is respectively located on two ends of the shielding cover 601, the magnetic poles of the opposite ends of the two permanent magnets 602 are different, therefore, in a normal state, the high driven roller 4 and the low driven roller 5 are kept in a horizontal state due to the mutual attraction of the permanent magnets 602, the driving rod 603 is fixedly connected to one end of the permanent magnet 602 far away from the inner cavity of the shielding cover 601, the driving rod 603 penetrates through the side wall of the shielding cover 601 and extends to the outer side of the shielding cover 601, the two shielding covers 601 are respectively connected with two transverse plates 15, the electromagnet 604 is located in the center of the shielding cover 601, when the driving roller 3, After the workpieces on the rubber belt 12 between the high driven rollers 4 are ground and polished, current is supplied to the electromagnet 604, so that the driving rod 603 moves towards two sides of the shielding case 601 under the action of repulsive force of the electromagnet 604, and then one ends of the high driven rollers 4 and the low driven rollers 5 are pushed to move up and down respectively, referring to the attached drawing 1, at the moment, the workpieces on the rubber belt 12 between the driving roller 3 and the high driven rollers 4 slide towards the right side, and the workpieces on the rubber belt 12 between the high driven rollers 4 and the low driven rollers 5 slide towards the left side, so that the effect of unloading materials on the rubber belt 12 is achieved; because the rubber belt 12 has elasticity, and in order to place materials on the rubber belt 12, the rubber belt 12 among the driving roller 3, the high driven roller 4 and the low driven roller 5 is not in a very tight state, the effect that the rubber belt 12 inclines along with the inclination of the high driven roller 4 and the low driven roller 5 can be realized, and then the function of unloading workpieces is realized;
referring to fig. 1 and 4, a baffle 7 is arranged inside a housing 1, a conveying device 8 is arranged between the baffle 7 and the housing 1, the conveying device 8 comprises a workpiece outlet 801, a workpiece inlet 802, a conveying belt 803, a fixed plate 804 and a conveying motor 805, the workpiece outlet 801 is arranged on the baffle 7 and is positioned between a high driven roller 4 and a low driven roller 5, the workpiece inlet 802 is arranged on the baffle 7 and is positioned between a driving roller 3 and the high driven roller 4, the conveying belt 803 is in transmission connection between the baffle 7 and the inner wall of the housing 1, two sides of the conveying belt 803 are in close contact with the inner walls of the housing 1 and the baffle 7, the fixed plate 804 is fixedly connected to the surface of the conveying belt 803, the conveying belt 803 is inclined towards one side of the inner cavity of the housing 1, and the conveying motor 805 is used for driving the conveying belt 803 to move; the workpiece on the rubber belt 12 between the high driven roller 4 and the low driven roller 5 slides to the left side, passes through the workpiece outlet 801 and falls on the conveying belt 803, and then is prevented from sliding downwards by the blocking of the fixed plate 804, so the workpiece moves to the workpiece inlet 802 along with the transmission of the conveying belt 803, because the conveying belt 803 inclines towards the center of the shell 1, namely, one side of the workpiece inlet 802, when the workpiece meets the workpiece inlet 802, the workpiece slides to the left side under the action of gravity, enters the inner cavity of the shell 1 through the workpiece inlet 802 and falls on the rubber belt 12 between the driving roller 3 and the high driven roller 4, and the workpiece after pre-polishing is conveyed to the rubber belt 12 between the driving roller 3 and the high driven roller 4 to perform main shot blasting polishing.
Referring to and attaching 1 and 6, offer the discharge gate 10 that is close to high driven roller 4 department on the outer wall of baffle 2, discharge gate 10 is a little less than the top surface of high driven roller 4 when the horizontal state, when high driven roller 4 is horizontal, high driven roller 4 shelters from discharge gate 10 for the work piece can not roll from discharge gate 10, when high driven roller 4 slopes, discharge gate 10 exposes, the unloading area 11 is installed to the below of worker's discharge gate 10, the piece can unload on the unloading area 11 through discharge gate 10.
Referring to fig. 1, a quantitative storage tank 9 is mounted on the outer wall of a housing 1, a quantitative feeding pipe 901 is connected to the bottom end of the quantitative storage tank 9, the quantitative feeding pipe 901 is communicated with the upper portion of a rubber belt 12 connected between a high driven roller 4 and a low driven roller 5 in an inner cavity of the housing 1, and the quantitative storage tank 9 has a function of automatically controlling a switching channel, that is, when a workpiece is loaded on the rubber belt 12 between the high driven roller 4 and the low driven roller 5 through the quantitative feeding pipe 901 can be controlled by a controller, so that the workpiece is pre-polished.
Referring to the attached drawing 5, the outer wall of the partition board 2 is provided with a sliding groove 16, the rotating shafts of the high driven roller 4 and the low driven roller 5 are sleeved in the inner part of the sliding groove 16 in a movable mode, the sliding ring 14 is sleeved on the rotating shaft of the high driven roller 4 and the rotating shaft of the low driven roller 5, one side of the sliding ring 14 is fixedly connected with a transverse plate 15, the transverse plate 15 is connected to the driving end of the side lifting device 6, the sliding ring 14 is connected with the high driven roller 4 and the low driven roller 5, the high driven roller 4 and the low driven roller 5 are enabled to rotate when one end of the high driven roller 4 and the one end of the low driven roller 5 are inclined, the feeding and discharging function without stopping the machine can be achieved, and continuous operation is achieved.
In the present application, when the electromagnet 604 is energized, the transport motor 805 is controlled to start, and when the electromagnet 604 is not energized, the high driven roller 4 and the low driven roller 5 return to their original positions due to the attraction of the two permanent magnets 602, and at this time, the transport motor 805 is also de-energized.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a steel casting is polished and is used crawler-type shot-blasting machine, includes shell (1), the both sides of the inside of shell (1) all are equipped with baffle (2), it is connected with drive roll (3), high driven voller (4) and low driven voller (5) to rotate on baffle (2), be connected with rubber tape (12), its characterized in that on drive roll (3), high driven voller (4) and low driven voller (5): the novel rubber belt type automatic transmission device is characterized in that the driving roller (3), the high driven roller (4) and the low driven roller (5) form a triangle, workpieces located between the driving roller (3) and the high driven roller (4) and between the high driven roller (4) and the low driven roller (5) are placed on the rubber belt (12), one ends of the high driven roller (4) and the low driven roller (5) are connected with a side lifting device (6), the side lifting device (6) is located on one side, away from the center of the shell (1), of the partition plate (2), a baffle (7) is arranged inside the shell (1), a conveying device (8) is arranged between the baffle (7) and the shell (1), and blocking piece covers (13) are arranged at the driving roller (3) and the high driven roller (4).
2. The crawler-type shot blasting machine for polishing the steel castings according to claim 1, wherein: a discharge hole (10) close to the high driven roller (4) is formed in the outer wall of the partition plate (2), the discharge hole (10) is slightly lower than the top surface of the high driven roller (4) in the horizontal state, and a discharge belt (11) is installed below the discharge hole (10).
3. The crawler-type shot blasting machine for polishing the steel castings according to claim 1, wherein: the quantitative sand-discharging device is characterized in that a quantitative storage box (9) is installed on the outer wall of the shell (1), the bottom end of the quantitative storage box (9) is connected with a quantitative feeding pipe (901), the quantitative feeding pipe (901) is communicated with the upper portion of a rubber belt (12) connected between a high driven roller (4) and a low driven roller (5) in the inner cavity of the shell (1), a sand outlet (1201) is formed in the rubber belt (12), and the sand outlet (1201) is conical.
4. The crawler-type shot blasting machine for polishing the steel castings according to claim 1, wherein: the device is characterized in that a sliding groove (16) is formed in the outer wall of the partition plate (2), rotating shafts of a high driven roller (4) and a low driven roller (5) are sleeved in the inner movable of the sliding groove (16), sliding rings (14) are sleeved on the rotating shafts of the high driven roller (4) and the low driven roller (5), a transverse plate (15) is fixedly connected to one side of each sliding ring (14), and the transverse plate (15) is connected to the side lifting driving end of the device (6).
5. The crawler-type shot blasting machine for polishing the steel castings according to claim 4, wherein: the side lifting device (6) comprises a shielding cover (601), a permanent magnet (602), a driving rod (603) and an electromagnet (604), wherein the shielding cover (601) is columnar, the number of the permanent magnets (602) is two, the two ends of the shielding cover (601) are respectively located, the driving rod (603) is fixedly connected to one end, away from the inner cavity of the shielding cover (601), of the permanent magnet (602), the driving rod (603) penetrates through the side wall of the shielding cover (601) and extends to the outer side of the shielding cover (601), the two shielding covers (601) are respectively connected with two transverse plates (15), and the electromagnet (604) is located at the center of the shielding cover (601).
6. The crawler-type shot blasting machine for polishing the steel castings according to claim 4, wherein: transport a device (8) including a mouth (801), income piece mouth (802), conveyer belt (803), decide board (804) and transport a motor (805), go out a mouth (801) and locate on baffle (7) and be located between high driven roller (4) and low driven roller (5), income piece mouth (802) are located on baffle (7) and are located between drive roll (3) and high driven roller (4), conveyer belt (803) transmission connection is between the inner wall of baffle (7) and shell (1), the both sides of conveyer belt (803) and the inner wall in close contact with of shell (1), baffle (7), decide board (804) fixed connection in the surface of conveyer belt (803), conveyer belt (803) slope towards one side of shell (1) inner chamber, it is used for driving conveyer belt (803) to move to transport a motor (805).
CN202210021769.6A 2022-01-10 2022-01-10 Crawler-type shot blasting machine for polishing steel castings Withdrawn CN114393521A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210021769.6A CN114393521A (en) 2022-01-10 2022-01-10 Crawler-type shot blasting machine for polishing steel castings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210021769.6A CN114393521A (en) 2022-01-10 2022-01-10 Crawler-type shot blasting machine for polishing steel castings

Publications (1)

Publication Number Publication Date
CN114393521A true CN114393521A (en) 2022-04-26

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ID=81230524

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210021769.6A Withdrawn CN114393521A (en) 2022-01-10 2022-01-10 Crawler-type shot blasting machine for polishing steel castings

Country Status (1)

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CN (1) CN114393521A (en)

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