A shot peening process and device with a crankshaft zero-point positioning function

Abstract

The present application relates to a shot peening process and device with a crankshaft zero-point positioning function. A shot peening process with a crankshaft zero-point positioning function includes the following steps: installing a laser rangefinder on a robot; mounting a crankshaft on a clamping device; moving the laser rangefinder to a first position opposite to one of the main journals of the crankshaft and projecting a ranging light beam onto the main journal; driving the crankshaft by the clamping device to rotate along the axis of the main journal until the ranging light beam coaxially enters the through-hole of the main journal, completing the first zero-point positioning; moving the laser rangefinder to a second position opposite to one of the connecting rod journals and projecting a ranging light beam; measuring the actual distance between the second position and the corresponding connecting rod journal by the laser rangefinder; and completing the second zero-point positioning when the difference between the actual distance and the preset distance is within the preset range. Through the second zero-point positioning, the present application enables the connecting rod journal to move between the main journal and the robot during subsequent shot peening, thereby solving the problem of positioning the crankshaft in a shot peening device.

Description

Technical Field

[0001] This application relates to the field of shot peening cleaning and strengthening of metal surfaces, and particularly to a shot peening process and device with a crankshaft zero-point positioning function. Background Art

[0002] After machining the oil holes, the crankshaft needs to be placed in a shot peening device to remove the burrs inside the oil holes. The shot peening device mainly includes a working chamber, a crankshaft jaw installed in the working chamber, a manipulator located in the working chamber, and a spray gun device for spraying shot material. The crankshaft is installed on the jaw and rotates along the axis of its main shaft. The manipulator controls the moving trajectory of the spray gun so that the spray gun aligns with the oil holes on the crankshaft one by one for shot peening.

[0003] To improve the working efficiency of the shot peening device, the program of the manipulator is usually preset to automatically control the continuous moving trajectory of the spray gun to achieve continuous shot peening of the oil holes. Therefore, it is necessary to position the oil holes on the crankshaft to determine the zero-point position of the crankshaft oil holes, providing a zero-point reference for the subsequent movement of the manipulator driving the spray gun.

[0004] The positioning devices for the crankshaft during machining are usually precision devices such as pneumatic or inductive types. However, due to the special working environment of the shot peening device itself, when shot peening the crankshaft, the shot material will fly everywhere in the working chamber, and the impact force caused by the shot material splashing on the surface of the parts will cause irreversible damage to the precision device itself. Over time, the precision device will not only be damaged and deformed by the shot material, but also very difficult to disassemble after deformation. Therefore, precision crankshaft positioning devices such as pneumatic or inductive types are not suitable for use in shot peening devices. Summary of the Invention

[0005] In order to solve the problem of positioning the crankshaft in the shot peening device as much as possible, this application provides a shot peening process and device with a crankshaft zero-point positioning function.

[0006] In a first aspect, a shot peening process with a crankshaft zero-point positioning function provided by this application adopts the following technical solution:

[0007] A shot peening process with a crankshaft zero-point positioning function includes the following steps:

[0008] S1. Install a laser rangefinder on the manipulator;

[0009] S2. Install the crankshaft on the clamping device in the working chamber;

[0010] S3. The manipulator drives the laser rangefinder to move to a first position opposite to one of the main journals of the crankshaft, and the laser rangefinder projects a ranging light ray arranged radially along the main journal to the main journal;

[0011] S4, the clamping device drives the crankshaft to rotate along the axis of the main journal until the through hole on the main journal is aligned with the laser rangefinder, and the ranging light coaxially enters the through hole of the main journal, completing the first zero point positioning;

[0012] S5, the manipulator drives the laser rangefinder to move to a second position opposite to one of the connecting rod necks, and the laser rangefinder projects a distance measuring light to the connecting rod neck;

[0013] S6, using the laser rangefinder to measure the actual distance between the second position and the corresponding connecting rod neck;

[0014] S7. When the difference between the actual distance and the preset distance is within a preset range, the second zero point positioning is completed.

[0015] By adopting the above technical solution, the crankshaft is composed of a plurality of main journals and a plurality of connecting rod journals connected in sequence, and the main journals and connecting rod journals on the crankshaft are arranged in an alternating manner, and the main journals and connecting rod journals on the crankshaft are both provided with oil holes, and the oil holes on the main journals are through holes. Since the radial arrangement positions of the main journals and connecting rod journals are different, the laser rangefinder not only needs to measure the position of the main journal as the first zero point reference, but also needs to measure the position of the connecting rod journal as the second zero point reference to perform double zero point positioning on the crankshaft, so a preset distance is set, and when the actual distance between the second position measured by the laser rangefinder and the corresponding connecting rod journal is within the preset range, the connecting rod journal moves to between the main journal and the manipulator, so that the spray gun can shot peen the oil holes on the connecting rod journal. This provides a reference for the subsequent manipulator and the clamping device to move according to the pre-set program, thereby solving the problem of positioning the crankshaft in the shot peening equipment.

[0016] Optionally, after step S6, the method further includes: S8, when the difference between the actual distance and the preset distance is greater than a preset range, the clamping device drives the crankshaft to rotate 180 degrees, thereby completing the second zero point positioning.

[0017] By adopting the above technical solution, when the difference between the actual distance and the preset distance is greater than the preset range, it means that the connecting rod neck is at the side of the main journal away from the laser rangefinder. The connecting rod neck needs to be rotated 180 degrees to the side of the main journal facing the laser rangefinder to facilitate shot peening of the oil holes on the connecting rod neck.

[0018] Optionally, a protective shell is provided on the laser rangefinder, one side of the protective shell is open and a protective plate is movably connected to the opening;

[0019] In step S3, when the laser rangefinder projects the ranging light, the protection plate on the side of the protective housing facing the crankshaft is opened, and the ranging light passes through the protective housing and is projected onto the crankshaft;

[0020] In step S7, after the laser rangefinder completes the second zero-point positioning, including step S9, when the laser rangefinder no longer projects the ranging light, the protection plate on the side of the protective housing facing the crankshaft covers the opening.

[0021] By adopting the above technical solution, when the laser rangefinder projects the ranging light, the protection plate is in an open state, and the ranging light passes through the protective housing without obstacles to ensure the measurement accuracy of the ranging light. After the laser rangefinder completes the positioning, the protection plate covers the protective housing, thereby providing comprehensive protection for the laser rangefinder and reducing the probability of the laser rangefinder being impacted during shot peening.

[0022] Optionally, after the laser rangefinder completes the second zero-point positioning, it further includes:

[0023] S10. The clamping device drives the crankshaft to rotate to the initial position, the manipulator drives the laser rangefinder away from the crankshaft to a certain set position, and at the same time drives the spray gun to perform a steady flow program, and then the manipulator drives the spray gun close to the crankshaft;

[0024] S11. The manipulator and the clamping device operate according to the set program to perform continuous shot peening on the crankshaft.

[0025] By adopting the above technical solution, after the crankshaft is positioned at two points, when the manipulator drives the spray gun to perform shot peening on the oil holes on the crankshaft, there is a zero-point reference. The spray gun always moves on the same side of the main journal, providing a reference for the subsequent manipulator and clamping device to move according to the preset program, improving the automation degree and working efficiency of the shot peening equipment. After the laser rangefinder completes the positioning work, the manipulator will drive the laser rangefinder away from the crankshaft to further reduce the damage to the laser rangefinder during shot peening.

[0026] In a second aspect, a shot peening device with a crankshaft zero-point positioning function provided by the present application adopts the following technical solution:

[0027] A shot peening device with a crankshaft zero-point positioning function includes an equipment housing. A working chamber is provided inside the equipment housing, and a feeding and discharging port communicating with the working chamber is opened. A sealing door is installed at the feeding and discharging port of the equipment housing. A clamping device for clamping the crankshaft and driving the crankshaft to rotate along the axis of the main journal and a manipulator moving in the working chamber are arranged in the working chamber of the equipment housing. A laser rangefinder and a spray gun are installed on the manipulator, and a protective housing is arranged on the manipulator. The laser rangefinder is located inside the protective housing.

[0028] By adopting the above technical solution, the oil hole on the crankshaft can be zero-positioned by a laser rangefinder, and the laser rangefinder can be protected by a protective shell to reduce the probability of shot splashing to the laser rangefinder when the crankshaft is shot peened by a spray gun, thereby extending the service life of the laser rangefinder and solving the problem of crankshaft positioning in the shot peening equipment as much as possible.

[0029] Optionally, a base plate is installed on the manipulator, the protective shell and the spray gun are respectively located at two ends of the base plate, and the spray direction of the spray gun is arranged perpendicular to the direction of the ranging light projected by the laser rangefinder.

[0030] By adopting the above technical solution, since the laser rangefinder and the spray gun are respectively located at the two ends of the bottom plate, the laser rangefinder and the spray gun will not be synchronously aligned with the crankshaft. After the laser rangefinder is positioned, the bottom plate will drive the laser rangefinder and the spray gun to flip until the muzzle of the spray gun is facing the crankshaft. At this time, the laser rangefinder is located on the side of the spray gun away from the crankshaft. This not only allows the bottom plate to act as a baffle to block the shot materials splashing onto the laser rangefinder, but also reduces the probability of the spray gun protecting the shell and the crankshaft colliding when moving, so as to facilitate the flexible movement of the spray gun.

[0031] Optionally, the protective shell includes a mounting shell and a protective plate, the mounting shell is mounted on the base plate and is provided with a ranging port for the ranging light to pass through, the protective plate covers the ranging port and is hinged to the peripheral wall of the mounting shell facing away from the base plate, and a control component is provided in the mounting shell for driving the protective plate to rotate to open or close the ranging port.

[0032] By adopting the above technical solution, when the laser rangefinder projects the ranging light, the control component drives the protection plate to rotate upward, so that the ranging light can pass through the ranging port. When the laser rangefinder finishes the positioning work, the control component drives the protection plate to rotate downward to cover the ranging port to protect the laser rangefinder.

[0033] Optionally, the control component includes a control cylinder and a control connecting rod, the control cylinder is installed on the inner wall of the mounting shell and the output shaft is arranged along the projection direction of the parallel ranging light, and the two ends of the control connecting rod are respectively hinged to the output shaft of the control cylinder and the protective plate.

[0034] By adopting the above technical solution, when the laser rangefinder projects the ranging light, the output shaft of the control cylinder is extended, thereby controlling the control connecting rod to push the protective plate to rotate upward. When the laser rangefinder finishes the positioning work, the output shaft of the control cylinder is shortened, thereby controlling the control connecting rod to push the protective plate to rotate downward.

[0035] Optionally, a dust blowing assembly is provided on the inner wall of the mounting shell, and the dust blowing assembly is located on the side of the laser rangefinder away from the bottom plate, and the dust blowing assembly blows air to remove dust from the ranging port in a direction parallel to the ranging light.

[0036] By adopting the above technical solution, when there is a lot of dust on the laser head of the laser rangefinder, it will affect the projection angle of the ranging light. Therefore, the laser head of the laser rangefinder needs to be dusted regularly, and the air blowing dust removal method can minimize the damage to the laser head during dust removal. When the protective plate is opened, the dust blowing component blows away from the laser rangefinder synchronously, minimizing the amount of dust entering the protective shell, thereby optimizing the dust removal effect of the laser rangefinder.

[0037] Optionally, a transparent shield for protecting the laser rangefinder is provided on the inner wall of the installation shell facing the bottom plate, and the transparent shield is located on the side of the laser rangefinder facing the ranging port and is detachably connected to the installation shell.

[0038] By adopting the above technical solution, the transparent shield does not affect the projection angle of the ranging light on the one hand, and protects the laser rangefinder on the other hand to prevent the laser side distance from falling out of the protective shell. The transparent shield is detachable and connectable to the mounting shell, so that the transparent shield can be replaced regularly.

[0039] In summary, the present application includes at least one of the following beneficial technical effects:

[0040] 1. The crankshaft is double-zero-point positioned through the first zero-point positioning and the second zero-point positioning, so that the connecting rod neck can be moved between the main journal and the manipulator during subsequent shot peening, providing a reference for the subsequent manipulator and clamping device to move according to the pre-set program, thereby solving the problem of positioning the crankshaft in the shot peening equipment;

[0041] 2. When the difference between the actual distance and the preset distance is greater than the preset range, it means that the connecting rod neck is on the side of the main journal away from the laser distance meter. The connecting rod neck needs to be rotated 180 degrees to the side of the main journal facing the laser distance meter to facilitate shot peening of the oil hole on the connecting rod neck;

[0042] 3. After the laser rangefinder completes positioning, the protective plate cover is closed on the protective shell, thereby providing all-round protection for the laser rangefinder and reducing the probability of the laser rangefinder being impacted during shot peening. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic flow chart of a shot peening process with a crankshaft zero point positioning function in the present application.

[0044] Figure 2 It is a structural schematic diagram of a shot peening device with a crankshaft zero point positioning function in the present application.

[0045] Figure 3 It is a schematic diagram of the connection between the laser rangefinder and the protective shell in the embodiment of the present application.

[0046] Figure 4 It is a schematic structural diagram of the crankshaft in the embodiment of the present application.

[0047] Figure 5 It is a schematic diagram of the positions of the laser rangefinder and the spray gun in the embodiment of the present application.

[0048] Figure 6 It is a schematic connection diagram of the protective housing and the control component in the embodiment of the present application.

[0049] In the figure: 1. Equipment housing; 11. Working chamber; 12. Inlet and outlet; 13. Sealing door; 2. Manipulator; 3. Bottom plate; 4. Laser rangefinder; 5. Spray gun; 6. Protective housing; 61. Mounting housing; 611. Rangefinding port; 62. Protective plate; 7. Control component; 71. Control cylinder; 72. Control connecting rod; 8. Dust blowing component; 9. Limiting part; 91. Transparent shutter; 92. Limiting pressing plate; 10. Crankshaft; 101. Main journal; 102. Connecting rod journal; 103. Oil hole. Specific embodiments

[0050] The following will Figure 1-6 further describe the present application in detail.

[0051] The embodiment of the present application discloses a shot peening process with a crankshaft zero positioning function. Referring to Figure 1 , the process includes the following steps:

[0052] S1. Prepare a shot peening device as Figure 2 shown, and install a laser rangefinder 4 as Figure 3 shown on the manipulator 2 of the shot peening device;

[0053] S2. Install the crankshaft 10 as Figure 4 shown on the clamping device in the working chamber 11 of the shot peening device;

[0054] S3. The manipulator 2 drives the laser rangefinder 4 to move to a first position opposite to one of the main journals 101 of the crankshaft 10, and the laser rangefinder 4 projects a rangefinding light ray arranged radially along the main journal 101;

[0055] S4. The clamping device drives the crankshaft 10 to rotate along the axis of the main journal 101 until the through hole on the main journal 101 is aligned with the laser rangefinder 4, and the rangefinding light ray is coaxially injected into the through hole of the main journal 101 until the measured distance on the laser rangefinder 4 is infinite, thereby completing the first zero positioning;

[0056] S5. The manipulator 2 drives the laser rangefinder 4 to move to a second position opposite to one of the connecting rod journals 102. The laser rangefinder 4 projects a ranging light beam onto the connecting rod journal 102, and the distance between the laser rangefinder 4 and the main journal 101 at this time is taken as the preset distance.

[0057] S6. Use the laser rangefinder 4 to measure the actual distance between the second position and the corresponding connecting rod journal 102.

[0058] S7. When the difference between the actual distance and the preset distance is within the preset range, that is, when the actual distance is less than or equal to the preset distance, it means that the connecting rod journal 102 is located between the main journal 101 and the manipulator 2, and then the second zero-point positioning is completed.

[0059] S8. When the difference between the actual distance and the preset distance is greater than the preset range, that is, when the actual distance is greater than the preset distance, it means that the connecting rod journal 102 is located on the side of the main journal 101 away from the manipulator 2. The clamping device drives the crankshaft 10 to rotate 180 degrees, so that the connecting rod journal 102 is flipped to between the main journal 101 and the manipulator, and then the second zero-point positioning is completed, so as to facilitate the subsequent spray gun 5 to perform shot peening on the oil hole 103 on the connecting rod journal 102.

[0060] In order to reduce the probability that the shot peening material splashes onto the laser rangefinder 4, it is necessary to protect the laser rangefinder 4. Therefore, as Figure 2 and Figure 3 shown, a protective housing 6 is provided at the laser rangefinder 4. One side of the protective housing 6 facing the ranging head of the laser rangefinder 4 is provided with an opening, and a protection plate 62 is movably connected to the opening. In steps S3 to S8, the laser rangefinder 4 is in a state of projecting a ranging light beam. When the laser rangefinder 4 projects a ranging light beam, the protection plate 62 on the side of the protective housing 6 facing the crankshaft 10 is opened, and the ranging light beam passes through the protective housing 6 and projects onto the crankshaft 10.

[0061] After the second zero-point positioning is completed, in S9, the laser rangefinder no longer projects a ranging light beam, and the protection plate on the side of the protective housing facing the crankshaft covers the opening.

[0062] S10. After the second zero-point positioning, the crankshaft 10 realizes double zero-point positioning, so as to provide a reference for the subsequent manipulator 2 and clamping device to move according to the preset program. Then the clamping device drives the crankshaft 10 to rotate to the initial position, the manipulator 2 drives the laser rangefinder 4 away from the crankshaft 10, and then the manipulator 2 drives the spray gun 5 to perform a steady flow program. After the steady flow program, the manipulator 2 drives the spray gun 5 to approach the crankshaft 10 to protect the laser rangefinder 4.

[0063] S11. The manipulator 2 and the clamping device operate according to the set program to perform continuous shot peening on the crankshaft 10.

[0064] The protective shell 6 is used to protect the laser rangefinder 4, so that the shot peening equipment can not only realize laser positioning but also protect the laser rangefinder 4, thereby solving the damage caused by shot splashing to the sensing precision equipment, thereby solving the problem of positioning the crankshaft 10 in the shot peening equipment as a whole.

[0065] The present application also discloses a shot peening device with a crankshaft zero point positioning function. Figure 2 , the device includes a device housing 1.

[0066] A working chamber 11 is provided in the equipment housing 1, and an inlet and outlet port 12 connected to the working chamber 11 is provided on the outside of the equipment housing 1 to facilitate the loading and unloading of the crankshaft 10. A sealing door 13 is installed at the inlet and outlet port 12 of the equipment housing 1 to prevent the shot peening from splashing out of the shot peening equipment. A clamping device and a manipulator 2 are provided in the working chamber 11 of the equipment housing 1. The clamping device can clamp the crankshaft 10 and drive the crankshaft 10 to rotate along the axis of the main journal 101. The manipulator 2 can move in the working chamber 11. Figure 3 As shown, a bottom plate 3 is mounted on the manipulator 2, and a laser rangefinder 4 and a spray gun 5 are mounted on the bottom plate 3. In order to protect the laser rangefinder 4, a protective shell 6 is provided on the bottom plate 3, and the laser rangefinder 4 is mounted in the protective shell 6.

[0067] In addition, the protective shell 6 is made of chromium, which not only has good hardness and wear resistance, and can remain unchanged under the impact of shot, but also has high oxidation resistance and corrosion resistance, so that the protective shell 6 can maintain its own structural stability when subjected to continuous splashing impact of shot, thereby extending the service life of the protective shell 6.

[0068] like Figure 3 and Figure 5 As shown, the protective housing 6 includes a mounting housing 61 and a protective plate 62. The mounting housing 61 is mounted on the bottom plate 3 and a distance measuring port 611 is provided on one side of the mounting housing 61 to connect the inside and outside of the mounting housing 61. The laser rangefinder 4 can be placed into the mounting housing 61 through the distance measuring port 611. At the same time, the distance measuring head of the laser rangefinder 4 faces the distance measuring port 611, so that the distance measuring light can pass through the distance measuring port 611. The protective plate 62 covers the distance measuring port 611 and is hinged to the peripheral wall of the mounting housing 61 away from the bottom plate 3. A control component 7 is provided in the mounting housing 61. The control component 7 is connected to the protective plate 62 and is used to drive the protective plate 62 to rotate to open or close the distance measuring port 611.

[0069] When positioning the crankshaft 10 before shot peening, the control assembly 7 drives the protection plate 62 to open the ranging port 611. The laser rangefinder 4 can perform zero-point positioning on the oil hole 103 of the crankshaft 10. After the positioning is completed, the control assembly 7 drives the protection plate 62 to close the ranging port 611, thereby protecting the laser rangefinder 4, reducing the probability that shot material splashes onto the laser rangefinder 4 when the spray gun 5 performs shot peening on the crankshaft 10, and extending the service life of the laser rangefinder 4, so as to solve the problem of positioning the crankshaft 10 in the shot peening equipment as much as possible.

[0070] To further optimize the protection effect of the protection plate on the ranging port, as Figure 5 shown, arc-shaped plates 63 are designed on both sides of the protection plate 62. When the protection plate 62 covers the ranging port 611, the arc-shaped plates 63 can increase the protection range of the ranging port 611 and further reduce the probability of shot material entering the ranging port 611.

[0071] To reduce the probability of collision between the protection housing 6 and the crankshaft 10 when the spray gun 5 moves, so as to facilitate the flexible movement of the spray gun 5 and further protect the laser rangefinder 4, referring to Figure 5 , the protection housing 6 and the spray gun 5 are respectively located at both ends of the bottom plate 3, and the spraying direction of the spray gun 5 is vertically arranged with the direction of the ranging light projected by the laser rangefinder 4.

[0072] When the laser rangefinder 4 is facing the crankshaft 10, the spray gun 5 is located below the bottom plate 3 to prevent the spray gun 5 from colliding with the crankshaft 10. When the spray gun 5 performs shot peening, the bottom plate 3 turns upward until the ranging port 611 is arranged upward, and the spray gun 5 faces the crankshaft 10. At this time, the protection plate 62 covers the ranging port 611, so that the bottom plate 3 can also act as a baffle to block the shot material splashing onto the laser rangefinder 4, thereby further protecting the laser rangefinder 4.

[0073] Referring to Figure 3 and Figure 6 , the control assembly 7 includes a control cylinder 71 and a control link 72. The control cylinder 71 is installed on the inner wall of the installation housing 61 and the output shaft is arranged along the projection direction of the parallel ranging light. Both ends of the control link 72 are hinged to the output shaft of the control cylinder 71 and the protection plate 62 respectively.

[0074] When the laser rangefinder 4 projects the ranging light, the output shaft of the control cylinder 71 extends to control the control link 72 to push the protection plate 62 to rotate upward. When the laser rangefinder 4 finishes the positioning work, the output shaft of the control cylinder 71 shortens to control the control link 72 to push the protection plate 62 to rotate downward.

[0075] To fix the position of the laser rangefinder 4, prevent the laser rangefinder 4 from falling out of the protection housing 6 and facilitate the disassembly of the laser rangefinder 4, referring to Figure 5 and Figure 6, a limiting member 9 is provided inside the installation housing 61. The limiting member 9 includes a transparent shutter 91 and a limiting pressing plate 92. The transparent shutter 91 is detachably located on the inner wall of the installation housing 61 facing the bottom plate 3 and on the side of the laser rangefinder 4 facing the ranging port 611. An installation chute for the transparent shutter 91 to slide into is provided in the installation housing 61 to facilitate regular replacement. The transparent shutter 91 is made of acrylic material and has a protective effect on the laser rangefinder 4. At the same time, the limiting pressing plate 92 is detachably installed on the installation housing 61 and abuts against the side wall of the laser rangefinder 4 facing away from the bottom plate 3, thereby realizing the position limitation of the laser rangefinder 4.

[0076] In addition, one end of the transparent shutter 91 facing away from the bottom plate 3 bends towards the limiting pressing plate 92 until it abuts against the limiting pressing plate 92, so that the laser rangefinder 4 is located in the sealed chamber formed by the limiting pressing plate 92, the transparent shutter 91 and the installation housing 61, thereby reducing dust from adhering to the ranging head of the laser rangefinder 4 and maintaining the ranging accuracy of the laser rangefinder 4 as much as possible.

[0077] When external dust adheres to the side wall of the transparent shutter 91, it will also affect the ranging accuracy of the laser rangefinder 4. Therefore, as Figure 5 and Figure 6 shown, a dust blowing assembly 8 is provided on the inner wall of the installation housing 61. The dust blowing assembly 8 is located on the side of the laser rangefinder 4 facing away from the bottom plate 3. A dust blowing assembly 8 is provided on the inner wall of the installation housing 61 facing away from the bottom plate 3. The dust blowing assembly 8 blows air along the direction parallel to the ranging light to remove dust from the ranging port 611. When the protection plate 62 is opened, the dust blowing assembly 8 blows air in the direction away from the laser rangefinder 4 synchronously, minimizing the amount of dust entering the protection housing 6, thereby optimizing the dust removal effect of the laser rangefinder 4.

[0078] The implementation principle of an impact device with a crankshaft zero-point positioning function in the embodiment of the present application is as follows: When positioning the crankshaft 10 before impact, first, the manipulator 2 drives the bottom plate 3 to turn until the laser rangefinder 4 faces the crankshaft 10. Subsequently, the control component 7 drives the protection plate 62 to open the ranging port 611. The laser rangefinder 4 can perform zero-point positioning on the oil hole 103 on the crankshaft 10. After the positioning is completed, the control component 7 drives the protection plate 62 to close the ranging port 611. Then the bottom plate 3 turns until the spray gun 5 faces the crankshaft 10. Finally, the spray gun 5 performs impact treatment on the oil hole 103 on the crankshaft 10. During impact, the laser rangefinder 4 can be protected to reduce the probability that shot material splashes to the laser rangefinder 4 when the spray gun 5 performs impact on the crankshaft 10, and extend the service life of the laser rangefinder 4, thereby solving the problem of positioning the crankshaft 10 in the impact equipment as much as possible.

[0079] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A shot peening process with a crankshaft zero-positioning function, characterized in that: It includes the following steps: S1. Install a laser rangefinder (4) on the manipulator (2); S2. Install the crankshaft (10) on the clamping device in the working chamber (11); S3. The manipulator (2) drives the laser rangefinder (4) to move to a first position opposite to one of the main journals (101) of the crankshaft (10), and the laser rangefinder (4) projects a ranging light ray arranged along the radial direction of the main journal (101); S4. The clamping device drives the crankshaft (10) to rotate along the axis of the main journal (101) until the through hole on the main journal (101) is aligned with the laser rangefinder (4), and the ranging light ray is coaxially incident into the through hole of the main journal (101) to complete the first zero-point positioning; S5. The manipulator (2) drives the laser rangefinder (4) to move to a second position opposite to one of the connecting rod journals (102), and the laser rangefinder (4) projects a ranging light ray on the connecting rod journal (102); S6. Use the laser rangefinder (4) to measure the actual distance between the second position and the corresponding connecting rod journal (102); S7. When the difference between the actual distance and the preset distance is within the preset range, the second zero-point positioning is completed.

2. The shot peening process with a crankshaft zero-point positioning function according to claim 1, characterized in that: After step S6, it further includes: S8. When the difference between the actual distance and the preset distance is greater than the preset range, the clamping device drives the crankshaft (10) to rotate 180 degrees, and then the second zero-point positioning is completed.

3. A shot peening process with a crankshaft zero-point positioning function according to claim 2, characterized in that: A protective housing (6) is covered on the laser rangefinder (4), and one side of the protective housing (6) is open and a protective plate (62) is movably connected to the opening; In step S3, when the laser rangefinder (4) projects a ranging light ray, the protective plate (62) on the side of the protective housing (6) facing the crankshaft (10) is opened, and the ranging light ray passes through the protective housing (6) and projects on the crankshaft (10); When the laser rangefinder (4) completes the second zero-point positioning, including step S9, when the laser rangefinder (4) no longer projects a ranging light ray, the protective plate (62) on the side of the protective housing (6) facing the crankshaft (10) covers the opening.

4. A shot peening process with a crankshaft zero-positioning function according to claim 3, characterized in that: When the laser rangefinder (4) completes the second zero-point positioning, it further includes: S10. The clamping device drives the crankshaft (10) to rotate to the initial position, the manipulator (2) drives the laser rangefinder (4) to move away from the crankshaft (10) to a certain set position, and at the same time drives the spray gun (5) to perform a steady flow program, and then the manipulator (2) drives the spray gun (5) to approach the crankshaft (10); S11. The manipulator (2) and the clamping device operate according to the set program to perform continuous shot peening on the crankshaft (10).

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