Polishing device for mechanical parts

Abstract

The invention belongs to the technical field of mechanical part machining, and particularly relates to a mechanical part polishing device which comprises a workbench, a collecting opening is formed in the top of the workbench, a discharging opening is formed in the front side of the workbench, and an L-shaped plate is fixedly connected to the side, away from the discharging opening, of the workbench; a polishing assembly is arranged at the top of the workbench, a limiting and blowing assembly is arranged at the top of an L-shaped plate and comprises a telescopic plate, a limiting shaft and a guide rail, the limiting and blowing assembly comprises a blocking plate, and when a bolt rod is conveyed on the guide rail, the blocking plate descends and moves, then the blocking plate makes contact with the telescopic plate firstly and extrudes the telescopic plate, so that the telescopic plate swings around the center of the limiting shaft; at the moment, the bottom of the telescopic plate limits the bottom of the bolt rod, the top of the telescopic plate is attached to the blocking plate, and the bottom of the blocking plate limits the top of the bolt rod, so that the phenomenon that the bolt rod shakes when just making contact with the polishing wheel is reduced, the phenomenon that the bolt rod is thrown out is prevented, the bolt rod is protected, and damage caused by collision is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical parts processing, in particular to a polishing device for mechanical parts. Background Art

[0002] Mechanical parts include smooth shafts, stepped shafts, bolt rods, bearing inner / outer rings, small-diameter steel pipes, etc. When casting mechanical parts, uneven cooling speed of the molten metal or other problems may cause uneven surfaces of the mechanical parts. Even when the mechanical parts are in use and come into contact with water without cleaning, rust may occur on the surface of the mechanical parts, requiring polishing.

[0003] In the current existing technology, most of the external cylindrical polishing machines are used when grinding the bolt rod. The working principle of the external cylindrical polishing machine is to use a polishing wheel connected to a motor to rotate, and a linear guide rail that can move laterally is installed between the polishing wheel and the guide wheel, and a pushing device or a feeding device is used to transport the bolt rod on the linear guide rail; when the rotating polishing wheel contacts the bolt rod, it will cause the bolt rod to rotate and perform surface grinding on the bolt rod. At the same time, the bolt rod moves axially, thereby completing the polishing work of the bolt rod.

[0004] However, when the existing external cylindrical polishing machine is in use, when the bolt rod moves on the guide rail to the contact of the two polishing wheels, the contact area and pressure between the polishing wheel and the bolt rod are uneven (for example, one side has close contact and the other side has a larger gap). The high-speed rotating polishing wheel will generate sliding friction on the contact point of the bolt rod (direction along the polishing wheel direction). However, since the friction forces on both sides are unequal in magnitude and asymmetric in direction (for example, the friction force on one side is upward and the other side may be almost zero), the bolt rod will be subjected to lateral force or eccentric torque, resulting in a mixture of its rotation around its own axis and the offset of the overall position, which will eventually cause the bolt rod to shake when it just contacts the polishing wheel, and then it will be polished and transported smoothly. Then, when the bolt rod shakes, it will be thrown around the polishing wheel, and even cause irreversible damage to the bolt rod. For this reason, the present invention provides a polishing device for mechanical parts. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows: a polishing device for mechanical parts according to the present invention comprises a workbench, a collecting port is provided on the top of the workbench, a discharge port is provided on the front side of the workbench, the discharge port and the collecting port are connected, and an L-shaped plate is fixedly connected to the side of the workbench away from the discharge port;

[0007] A polishing assembly is provided on the top of the workbench, and a limited blowing assembly is provided on the top of the L-shaped plate. The polishing assembly includes a telescopic plate, a limiting shaft and a guide rail. The limiting blowing assembly includes a blocking plate, which moves toward the guide rail and contacts the bolt rod, and squeezes the telescopic plate to swing around the center of the limiting shaft. The blocking plate blows out cold air and contacts the bolt rod.

[0008] Preferably, the polishing assembly also includes a motor, which is fixedly connected to the top of the workbench, and the output end of the motor is fixedly connected to the polishing wheel. The motor and the polishing wheel are symmetrically arranged in two groups along the center of the guide rail, and the side of the guide rail is fixedly connected to a support plate, the support plate is fixedly connected to the limit shaft, and the surface of the limit shaft is rotatably connected to the center of the telescopic plate.

[0009] Preferably, the limiting blowing assembly also includes an electric cylinder, which is fixedly connected to the top of the workbench, and the output end of the electric cylinder is fixedly connected to an output rod, and the end of the output rod away from the electric cylinder is fixedly connected to the blocking plate, and the diameter of the blocking plate is greater than the diameter of the guide plate.

[0010] Preferably, the top of the L-shaped plate is fixedly connected to a vortex tube cold air box, the bottom of the vortex tube cold air box is fixedly connected to a pipe, the end of the pipe away from the vortex tube cold air box is fixedly connected to the blocking plate, and a plurality of groups of air outlet holes are provided on the side of the blocking plate away from the pipe.

[0011] Preferably, guide plates are fixedly connected to both sides of the guide rail, and the guide plates are arc-shaped. One side of the guide plate is in close contact with the edge of the collection port away from the telescopic plate, and the other side of the guide plate is in close contact with the edge of the collection port close to the telescopic plate.

[0012] Preferably, the output rod passes through the L-shaped plate and is slidably connected, the diameter of the blocking plate is 20 cm, and the diameter of the guide plate is 15 cm.

[0013] Preferably, the pipe passes through the L-shaped plate and is slidably connected, the pipe is connected to the baffle plate, and two groups of the vortex tube cold air box and the pipe are symmetrically arranged along the transverse center of the baffle plate.

[0014] Preferably, the limiting shaft is configured as a telescopic device, and the pipeline is configured as a hose.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The present invention relates to a polishing device for mechanical parts. When the bolt rod is transported on the guide rail, the blocking plate moves downward, and then the blocking plate first contacts and squeezes the telescopic plate, causing the telescopic plate to swing around the center of the limiting axis. At this time, the bottom of the telescopic plate limits the bottom of the bolt rod, and the top of the telescopic plate fits against the blocking plate, and the bottom of the blocking plate limits the top of the bolt rod, thereby reducing the shaking of the bolt rod when it first contacts the polishing wheel, preventing the bolt rod from being thrown out, and protecting the bolt rod from damage caused by collision.

[0017] 2. The polishing device for mechanical parts described in the present invention guides cold air through a vortex tube cold air box and sprays it from the bottom of the baffle plate. Since the baffle plate is in contact with the top of the bolt rod, the cold air blown out by the baffle plate can cool the bolt rod during grinding and blow the debris generated by grinding away from the guide rail, thereby improving the effect of polishing the bolt rod and making it easier for the staff to clean up the debris later. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0020] Figure 2 It is a partial schematic diagram of the overall structure of the present invention;

[0021] Figure 3 This is a partial diagram of the polishing assembly structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the polishing assembly structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the disassembly of the telescopic plate and guide rail structure of the present invention;

[0024] Figure 6 This is a partial structural diagram of the position-limiting air blowing assembly of the present invention;

[0025] Figure 7 This is a schematic cross-sectional view of the structure of the position-limiting air blowing assembly of the present invention;

[0026] Figure 8 It is a two-dimensional side view schematic diagram of the overall structure of the present invention.

[0027] In the figure: 1. workbench; 2. discharge port; 3. collection port; 4. L-shaped plate; 51. motor; 52. polishing wheel; 53. support plate; 54. telescopic plate; 55. limit shaft; 56. guide rail; 57. guide plate; 61. electric cylinder; 62. output rod; 63. blocking plate; 64. air outlet; 65. vortex tube cold air box; 66. pipeline. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0029] A polishing device for mechanical parts according to an embodiment of the present invention is described in detail. Figures 1 to 8 A polishing device for mechanical parts includes a workbench 1, a collecting port 3 is provided on the top of the workbench 1, a discharge port 2 is provided on the front side of the workbench 1, the discharge port 2 and the collecting port 3 are connected, and an L-shaped plate 4 is fixedly connected to the side of the workbench 1 away from the discharge port 2;

[0030] A polishing assembly is provided on the top of the workbench 1, and a limited blowing assembly is provided on the top of the L-shaped plate 4. The polishing assembly includes a telescopic plate 54, a limiting shaft 55 and a guide rail 56. The limiting blowing assembly includes a blocking plate 63. The blocking plate 63 moves toward the guide rail 56 and contacts the bolt rod, and squeezes the telescopic plate 54 to swing around the center of the limiting shaft 55. The blocking plate 63 blows out cold air and contacts the bolt rod.

[0031] The present invention takes into account that when the existing external cylindrical polishing machine is in use, when the bolt rod moves on the guide rail to the contact of the two polishing wheels, the contact area and pressure between the polishing wheel and the bolt rod are uneven, for example, one side is in close contact and the other side has a larger gap. The high-speed rotating polishing wheel will generate a sliding friction force on the contact point of the bolt rod in the direction of the polishing wheel. However, since the friction forces on both sides are of different sizes and asymmetric directions, for example, the friction force on one side is upward and the other side may be almost zero, the bolt rod will be subjected to a lateral force or an eccentric moment, resulting in a mixture of its rotation around its own axis and the deviation of the overall position, which will eventually cause the bolt rod to shake when it just contacts the polishing wheel, and then it will be polished and transported smoothly. The bolt rod may be thrown out around the polishing wheel when it shakes, and even cause irreversible damage to the bolt rod. Therefore, when the bolt rod is transported on the guide rail 56, the blocking plate 63 moves downward, and then the blocking plate 63 will first contact the telescopic plate 54 and squeeze it, so that the telescopic plate 54 swings around the center of the limiting shaft 55. At this time, the bottom of the telescopic plate 54 limits the bottom of the bolt rod, and the top of the telescopic plate 54 fits against the blocking plate 63, and the bottom of the blocking plate 63 limits the top of the bolt rod, thereby reducing the shaking of the bolt rod when it just contacts the polishing wheel, preventing the bolt rod from being thrown out, and protecting the bolt rod from damage caused by collision.

[0032] Next, considering that during the polishing and grinding process of the bolt rod, the polishing wheel moves at a high speed relative to the surface of the bolt rod, the polishing wheel speed can reach thousands of revolutions per minute, and the bolt rod itself also rotates, and there is a huge friction force on the contact surface between the two. According to the law of conservation of energy, the mechanical energy consumed in the friction process will be converted into heat energy, causing the temperature of the contact area to rise rapidly, that is, the polishing wheel surface and the bolt rod surface will generate heat. In addition, during the grinding process, a large number of hard abrasive particles such as aluminum oxide and silicon carbide are distributed on the surface of the polishing wheel. The hardness of these particles is much higher than that of the metal material of the bolt rod, such as ordinary bolt steel, which has a hardness of about 200-300HV, while the oxide The hardness of aluminum abrasive can reach 1800-2200HV. When the abrasive particles pass over the surface of the bolt rod at high speed, they will cut off the "excess materials" such as bumps, burrs, oxide scale and so on on the surface like countless tiny "knives", forming fine metal debris. Therefore, the cold air is guided through the vortex tube cold air box 65 and sprayed out from the bottom of the baffle plate 63. Since the baffle plate 63 is in contact with the top of the bolt rod, the cold air blown out by the baffle plate 63 can cool the bolt rod being ground, and can blow the debris generated by grinding away from the guide rail 56, thereby improving the effect of polishing the bolt rod and making it easier for the staff to clean up the debris later.

[0033] In order to achieve the normal polishing effect of the bolt rod, the following specific structure needs to be disclosed in detail, please refer to Figures 1 to 5 The polishing assembly also includes a motor 51, which is fixedly connected to the top of the workbench 1. The output end of the motor 51 is fixedly connected to the polishing wheel 52. The motor 51 and the polishing wheel 52 are symmetrically arranged in two groups along the center of the guide rail 56. The side of the guide rail 56 is fixedly connected to a support plate 53. The support plate 53 is fixedly connected to the limit shaft 55, and the surface of the limit shaft 55 is rotatably connected to the center of the telescopic plate 54.

[0034] During operation, the staff puts the bolt rod into the surface of the guide rail 56, and then uses the feeding device to push the bolt rod on the surface of the guide rail 56 toward the polishing wheel 52, and then starts the two sets of motors 51 respectively, and drives the two sets of polishing wheels 52 to rotate at high speed. When the bolt rod approaches the polishing wheel 52 and the two sets of polishing wheels 52 rotate at high speed, the bolt rod will enter between the two sets of polishing wheels 52, and then the two sets of polishing wheels 52 will drive the bolt rod to rotate and polish the surface of the bolt rod. Then, the polished bolt rod will enter the end of the guide rail 56, which is close to the collecting port 3, and then the polished bolt rods arranged in sequence will fall into the collecting port 3 and flow out from the discharge port 2 into the collection box prepared in advance, and then the normal polishing and grinding of the bolt rod is completed.

[0035] Considering that the bolt rod will shake when it just enters between the two sets of polishing wheels 52, it is necessary to disclose the limit blowing assembly in detail. Please refer to Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 、 Figure 8 The limited blowing assembly also includes an electric cylinder 61, which is fixedly connected to the top of the workbench 1. The output end of the electric cylinder 61 is fixedly connected to an output rod 62. The end of the output rod 62 away from the electric cylinder 61 is fixedly connected to a blocking plate 63. The diameter of the blocking plate 63 is greater than the diameter of the guide plate 57. In this embodiment, the blocking plate 63 is set in a semi-arc state to facilitate contact with the surface of the bolt rod and effectively prevent the debris generated during subsequent polishing from blocking the guide;

[0036] In the process of achieving normal polishing of the bolt rod, the electric cylinder 61 is first started, so that the output rod 62 approaches the direction of the guide rail 56, that is, it descends. The movement of the output rod 62 will drive the blocking plate 63 to move synchronously. At this time, the blocking plate 63 is between the two sets of polishing wheels 52. Since the diameter of the blocking plate 63 is greater than the distance between the guide plates 57, that is, the end of the blocking plate 63 away from the collecting port 3 coincides with the telescopic plate 54, and the other side of the blocking plate 63 coincides with the end close to the collecting port 3 and the telescopic plate 54. Then the blocking plate 63 will first contact and squeeze the surface of the telescopic plate 54, and then the telescopic plate 54 will be squeezed to swing around the center of the limit shaft 55, so that the bottom of the telescopic plate 54 will be relative When the two sets of polishing wheels 52 are in the state of being away from each other, the tops of the telescopic plates 54 will be in the state of being close to each other, so that the bottom of the telescopic plates 54 can contact and limit the bottom of the bolt rod transported on the surface of the guide rail 56, and the top of the telescopic plates 54 will clamp and limit the descending blocking plate 63. Not only can the blocking plate 63 limit the bolt rod being transported by the guide rail 56, so that the bolt rod can be prevented from shaking when entering between the two sets of polishing wheels 52, but at the same time, the telescopic plates 54 can swing around the center of the limiting shaft 55. On the one hand, it can limit the bottom of the bolt rod being transported, and on the other hand, it can clamp and limit the descending blocking plate 63 to prevent the bolt rod from being thrown out when the two sets of polishing wheels 52 contact the bolt rod.

[0037] Next, when the two sets of polishing wheels 52 rotate at high speed to polish the bolt rod, heat and debris will be generated. Therefore, the following specific structure needs to be disclosed in detail. Please refer to Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 、 Figure 8, the top of the L-shaped plate 4 is fixedly connected to a vortex tube cold air box 65, and the bottom of the vortex tube cold air box 65 is fixedly connected with a pipe 66, and the end of the pipe 66 away from the vortex tube cold air box 65 is fixedly connected to the baffle plate 63, and a plurality of groups of air outlet holes 64 are provided on the side of the baffle plate 63 away from the pipe 66. In this embodiment, the working principle of the vortex tube cold air box 65, the vortex tube cold air box 65 is also called a vortex tube cold air gun, which uses a nozzle of high-pressure gas (usually air) that is compressed and cooled to enter the vortex tube, and enters the vortex chamber at a high speed in the tangential direction to form a rotating airflow. Due to the action of centrifugal force, the airflow is divided into an outer layer of cold airflow and an inner layer of hot airflow. When the cold airflow flows along the tube wall, the internal energy is converted into kinetic energy, resulting in a drop in temperature; the hot airflow is discharged through the other end;

[0038] When the blocking plate 63 descends to between the two sets of polishing wheels 52, the vortex tube cooling box 65 needs to be started so that the vortex tube cooling box 65 generates cold air and transmits it to the pipe 66, and is discharged from the air outlet 64 opened in the blocking plate 63, thereby cooling the bolt rod being polished between the two sets of polishing wheels 52 and cooling the surfaces of the two sets of polishing wheels 52.

[0039] Next, the two sets of polishing wheels 52 will generate dust when polishing the bolt rod, so the following specific structure needs to be disclosed in detail, please refer to Figure 3 and Figure 4 , guide plates 57 are fixedly connected to both sides of the guide rail 56, and the guide plates 57 are arc-shaped. One side of the guide plate 57 is in close contact with the edge of the collection port 3 away from the telescopic plate 54, and the other side of the guide plate 57 is in close contact with the edge of the collection port 3 close to the telescopic plate 54. In this embodiment, the guide plate 57 is arc-shaped, and is for the purpose of diverting the debris polished by the polishing wheel 52 and the bolt rod, and facilitating subsequent collection.

[0040] When the two sets of polishing wheels 52 rotate at high speed to transport and polish the bolt rod, a large amount of dust will be generated. Therefore, the generated dust will be blown to the surface of the guide plate 57 by the cold air ejected from the air outlet 64 and slide into the dust box prepared in advance for collection.

[0041] For a detailed disclosure of how to drive the blocking plate 63 up and down, please refer to Figure 1 、 Figure 2 and Figure 6 The output rod 62 passes through the L-shaped plate 4 and is slidably connected. The diameter of the blocking plate 63 is 20 cm, and the diameter of the guide plate 57 is 15 cm.

[0042] For detailed information on the configuration of the cooling system, please refer to Figure 6 and Figure 7The pipe 66 passes through the L-shaped plate 4 and is slidably connected. The pipe 66 is connected to the blocking plate 63. Two groups of vortex tube cold air boxes 65 and pipes 66 are symmetrically arranged along the transverse center of the blocking plate 63.

[0043] For detailed disclosure of the structure of the limiting shaft 55 and the pipe 66, please refer to Figures 1 to 8 The limiting shaft 55 is a telescopic setting, and the pipeline 66 is a hose setting.

[0044] Working principle: During operation, the staff puts the bolt rod into the surface of the guide rail 56, and then uses the feeding device to push the bolt rod on the surface of the guide rail 56 toward the polishing wheel 52, and then starts the two sets of motors 51 respectively, and drives the two sets of polishing wheels 52 to rotate at high speed respectively. When the bolt rod approaches the polishing wheel 52, and when the two sets of polishing wheels 52 rotate at high speed, the bolt rod will enter between the two sets of polishing wheels 52, and then the two sets of polishing wheels 52 will drive the bolt rod to rotate and polish the surface of the bolt rod. Then, the polished bolt rod will enter the end of the guide rail 56, which is close to the collecting port 3, and then the polished bolt rods arranged in sequence will fall into the collecting port 3 and flow out from the discharge port 2 into the collection box prepared in advance, thereby completing the normal polishing and grinding of the bolt rod.

[0045] In the process of achieving normal polishing of the bolt rod, the electric cylinder 61 is first started, so that the output rod 62 approaches the direction of the guide rail 56 (that is, descends). The movement of the output rod 62 drives the blocking plate 63 to move synchronously. At this time, the blocking plate 63 is between the two sets of polishing wheels 52. Since the diameter of the blocking plate 63 is greater than the distance between the guide plates 57, that is, the end of the blocking plate 63 away from the collecting port 3 coincides with the telescopic plate 54, and the other side of the blocking plate 63 coincides with the end close to the collecting port 3 and the telescopic plate 54. Then the blocking plate 63 will first contact and squeeze the surface of the telescopic plate 54, and then the telescopic plate 54 will be squeezed and swing around the center of the limit shaft 55, so that the bottom of the telescopic plate 54 will When the two sets of polishing wheels 52 are in the state of being away from each other, the tops of the telescopic plates 54 will be in the state of being close to each other, so that the bottom of the telescopic plates 54 can contact and limit the bottom of the bolt rod transported on the surface of the guide rail 56, and the top of the telescopic plates 54 will clamp and limit the descending blocking plate 63. Not only can the blocking plate 63 limit the bolt rod being transported by the guide rail 56, so that the bolt rod can be prevented from shaking when entering between the two sets of polishing wheels 52, but at the same time, the telescopic plates 54 can swing around the center of the limiting axis 55. On the one hand, it can limit the bottom of the bolt rod being transported, and on the other hand, it can clamp and limit the descending blocking plate 63 to prevent the bolt rod from being thrown out when the two sets of polishing wheels 52 contact the bolt rod.

[0046] When the blocking plate 63 descends to between the two sets of polishing wheels 52, the vortex tube cooling box 65 needs to be started so that the vortex tube cooling box 65 generates cold air and transmits it to the pipe 66, and is discharged from the air outlet 64 opened in the blocking plate 63, thereby cooling the bolt rod being polished between the two sets of polishing wheels 52 and cooling the surfaces of the two sets of polishing wheels 52.

[0047] When the two sets of polishing wheels 52 rotate at high speed to transport and polish the bolt rod, a large amount of dust will be generated. Therefore, the generated dust will be blown to the surface of the guide plate 57 by the cold air ejected from the air outlet 64 and slide into the dust box prepared in advance for collection.

[0048] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A polishing device for mechanical parts, comprising a workbench (1), characterized in that: The heavy armor on the top of the workbench (1) is provided with a collecting port (3), the front side of the workbench (1) is provided with a discharge port (2), the discharge port (2) and the collecting port (3) are arranged in communication, and an L-shaped plate (4) is fixedly connected to the side of the workbench (1) away from the discharge port (2); A polishing assembly is provided on the top of the workbench (1), and a limited blowing assembly is provided on the top of the L-shaped plate (4). The polishing assembly comprises a telescopic plate (54), a limiting shaft (55) and a guide rail (56). The limited blowing assembly comprises a blocking plate (63). The blocking plate (63) moves in the direction of the guide rail (56) to contact the bolt rod and squeezes the telescopic plate (54) to swing around the center of the limiting shaft (55). The blocking plate (63) blows out cold air to contact the bolt rod.

2. A polishing device for mechanical parts according to claim 1, characterized in that: The polishing assembly further comprises a motor (51), the motor (51) being fixedly connected to the top of the workbench (1), the output end of the motor (51) being fixedly connected to a polishing wheel (52), the motor (51) and the polishing wheel (52) being symmetrically arranged in two groups along the center of a guide rail (56), the side of the guide rail (56) being fixedly connected to a support plate (53), the support plate (53) being fixedly connected to a limiting shaft (55), and the surface of the limiting shaft (55) being rotatably connected to the center of a telescopic plate (54).

3. A polishing device for mechanical parts according to claim 2, characterized in that: The position-limiting air blowing assembly further comprises an electric cylinder (61), the electric cylinder (61) being fixedly connected to the top of the workbench (1), the output end of the electric cylinder (61) being fixedly connected to an output rod (62), the end of the output rod (62) away from the electric cylinder (61) being fixedly connected to a blocking plate (63), and the diameter of the blocking plate (63) being greater than the diameter of the guide plate (57).

4. A polishing device for mechanical parts according to claim 3, characterized in that: The top of the L-shaped plate (4) is fixedly connected to a vortex tube cold air box (65), and the bottom of the vortex tube cold air box (65) is fixedly connected to a pipe (66). The end of the pipe (66) away from the vortex tube cold air box (65) is fixedly connected to the blocking plate (63) through the pipe. A plurality of groups of air outlet holes (64) are provided on a side of the blocking plate (63) away from the pipe (66).

5. A polishing device for mechanical parts according to claim 4, characterized in that: Guide plates (57) are fixedly connected to both sides of the guide rail (56), and the guide plates (57) are arranged in an arc shape. One side of the guide plate (57) is in close contact with the edge of the collection port (3) away from the telescopic plate (54), and the other side of the guide plate (57) is in close contact with the edge of the collection port (3) close to the telescopic plate (54).

6. A polishing device for mechanical parts according to claim 5, characterized in that: The output rod (62) passes through the L-shaped plate (4) and is in sliding connection.

7. A polishing device for mechanical parts according to claim 6, characterized in that: The pipe (66) passes through the L-shaped plate (4) and is slidably connected. The pipe (66) is connected to the blocking plate (63). Two groups of vortex tube cold air boxes (65) and pipes (66) are symmetrically arranged along the transverse center of the blocking plate (63).

8. A polishing device for mechanical parts according to claim 7, characterized in that: The limiting shaft (55) is configured to be telescopic, and the pipeline (66) is configured to be a hose.

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