CN109554527B - Ultrasonic shot blasting machine tool for heat transfer pipe of steam generator and shot blasting method thereof - Google Patents
Ultrasonic shot blasting machine tool for heat transfer pipe of steam generator and shot blasting method thereof Download PDFInfo
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- CN109554527B CN109554527B CN201811368459.1A CN201811368459A CN109554527B CN 109554527 B CN109554527 B CN 109554527B CN 201811368459 A CN201811368459 A CN 201811368459A CN 109554527 B CN109554527 B CN 109554527B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
Abstract
The invention discloses an ultrasonic shot blasting machine tool for a heat transfer pipe of a steam generator and a shot blasting method thereof, wherein the ultrasonic shot blasting machine tool for the heat transfer pipe of the steam generator comprises a machine tool body, a control console, a transmission mechanism, an ultrasonic shot blasting mechanism and a heat transfer pipe fixing mechanism, the control console comprises a controller and an operation interface, the controller is connected with a power supply of the machine tool, the operation interface is connected with the controller, the transmission mechanism comprises a first driving motor, a second driving motor, a first lead screw, two first guide rails, a first supporting platform, a supporting arm and a connecting rod, the ultrasonic shot blasting mechanism comprises an ultrasonic generator and an impact gun, and the heat transfer pipe fixing mechanism comprises a rack and a heat transfer pipe transmission fixer.
Description
Technical Field
The invention relates to the technical field of nuclear engineering, in particular to an ultrasonic shot blasting machine tool for a heat transfer pipe of a steam generator and a shot blasting method thereof.
Background
The steam generator is a key device of a nuclear power device, the heat transfer tubes are key parts of the steam generator, nearly ten thousand tiny heat transfer tubes are distributed on a tube plate with a small gap, primary side water with high temperature and high pressure exchanges heat with external secondary side water through the heat transfer tubes when the steam generator works, the heat transfer tubes of the steam generator are subjected to the action of high temperature and high pressure, alternating load and the like during the operation process, stress corrosion is easy to generate, further circumferential and axial cracks are generated, and the problem of failure caused by damage and leakage is solved, radioactive substance leakage and long-term shutdown of a nuclear power plant can be caused as long as one heat transfer tube is broken, the existing ultrasonic shot blasting is the best method for changing the surface residual stress of a metal product, and the ultrasonic shot blasting is successfully applied to the improvement of the fatigue life of metal parts and metal welding seams of aerospace, for example, the fatigue life of the metal product is greatly improved after the residual stress is changed from tensile stress to compressive, in the steel welding seam treatment, ultrasonic shot blasting treatment is commonly used for eliminating the residual stress of the welding seam, but the heat transfer pipe of each steam generator is characterized by small inner diameter, 10-20 mm inner diameter, long length, more than 10 m length and more than 1 ten thousand heat transfer pipes, and the problems of high difficulty, low efficiency, high cost and incapability of shot blasting treatment on the inner wall surface of the heat transfer pipe exist at present.
Disclosure of Invention
The invention aims to provide an ultrasonic shot blasting machine tool for a heat transfer pipe of a steam generator and a shot blasting method thereof, which have the advantages of high shot blasting strengthening treatment efficiency, high precision, convenient operation and low shot blasting treatment cost, and are used for solving the problems of high difficulty, low efficiency and high cost of the existing shot blasting strengthening treatment on the inner wall of the heat transfer pipe and incapability of shot blasting treatment on the surface of the inner wall of the heat transfer pipe.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a steam generator heat transfer pipe ultrasonic shot blasting machine tool comprises a machine tool body, a control console, a transmission mechanism, an ultrasonic shot blasting mechanism and a heat transfer pipe fixing mechanism, wherein a chute opening is formed in the top of the machine tool body;
the console comprises a controller and an operation interface, the controller is connected with a power supply, and the operation interface is connected with the controller;
the transmission mechanism comprises a first driving motor, a second driving motor, a first screw rod, two first guide rails, a first supporting platform, a supporting arm and a connecting rod, the first driving motor is fixed at one end in the machine tool body, two ends of the first lead screw are respectively connected to a rotating shaft of the first driving motor and a bearing seat in the machine tool body, the two first guide rails are horizontally arranged in the machine tool body and symmetrically distributed on two sides above the first screw rod, the middle part of the first supporting platform is arranged on a first screw rod, the upper part of the first supporting platform is arranged on two first guide rails, one end of the supporting arm is fixed on the first supporting platform and is vertical to the first lead screw, the other end of the supporting arm extends out of the chute opening and extends out of the machine tool body, the second driving motor is fixed at the other end of the supporting arm, the connecting rod is arranged above the opening of the sliding groove in parallel, and one end of the connecting rod is connected with a rotating shaft of the second driving motor;
the ultrasonic shot blasting mechanism comprises an ultrasonic generator and an impact gun, the ultrasonic generator is placed in the machine tool body, the impact gun is fixed at the other end of the connecting rod, the ultrasonic generator is connected with the controller, and the impact gun is connected with the ultrasonic generator;
the heat transfer pipe fixing mechanism comprises a rack and a heat transfer pipe fixer, the rack comprises a workbench and a support, the workbench is opposite to an impact gun at one end of the machine tool body, the support supports the workbench, the heat transfer pipe is placed on the workbench and opposite to the impact gun, the heat transfer pipe fixer comprises a third driving motor, a reduction gear box and a pressing arm, the third driving motor is connected with a controller, a power input shaft of the reduction gear box is connected with a rotating shaft of the third driving motor, and a power output shaft of the reduction gear box is connected with one end of the pressing arm.
Preferably, the transmission mechanism further comprises a height adjusting device of the impact gun, the height adjusting device comprises a fourth driving motor, a second lead screw, two second guide rails and a second supporting table, the fourth driving motor is fixedly mounted on the first supporting table and connected with the controller, two ends of the second lead screw are respectively connected to a rotating shaft of the fourth driving motor and a bearing seat of the supporting arm, the second lead screw is perpendicular to the first lead screw, the two second guide rails are arranged on two sides of the second lead screw in parallel, the middle of the second supporting table is mounted on the second lead screw, two sides of the second supporting table are mounted on the two second guide rails, and the second driving motor is fixedly mounted on the second supporting table.
Preferably, one end of the machine tool body is provided with a supporting device of a connecting rod, and the supporting device comprises a pulley frame and a plurality of pulleys mounted on the pulley frame.
Preferably, the supporting device further comprises an electric lifter, the electric lifter is arranged in the machine tool body, a lifting rod of the electric lifter is connected with the pulley yoke, and the electric lifter is connected with the controller.
Preferably, the impact gun comprises a gun body and a tool head, wherein an ultrasonic transducer, an amplitude-variable vibration rod and an impact rod are arranged in the gun body, the amplitude-variable vibration rod is arranged between the ultrasonic transducer and the impact rod, the tool head comprises at least one firing pin, at least one spring, at least one firing pin carrier and a cylinder, the firing pin is arranged on the side surface of the firing pin carrier, the firing pin carrier is arranged in the cylinder, the firing pin extends out of a through hole in the side surface of the cylinder, the spring is sleeved outside each firing pin, two ends of each spring are respectively fixed on the surface of the cylinder wall and the firing pin carrier, the cylinder is sleeved at the outer end of the gun body, and the impact rod extends out of the outer end of the gun body and is freely inserted into a firing pin.
Preferably, the front end of the impact rod is conical.
Preferably, the opening of the striker hole forms an outward flared bell mouth, and the diameter of the hole in the striker hole is smaller than that of the striker rod.
Preferably, two striker carriers are arranged in the cylinder, and the two striker carriers are symmetrically distributed.
Preferably, when the impact rod is inserted into the striker hole, the striker on the striker carrier applies an impact force to an inner wall surface of the heat transfer pipe fitted outside the impact gun.
The invention also discloses a shot blasting method of the steam generator heat transfer pipe ultrasonic shot blasting machine tool, which comprises the following steps:
fixing the heat transfer pipe on a rack opposite to the impact gun;
a first driving motor of the machine tool drives a first lead screw to rotate, and a first supporting platform moves on the first lead screw and drives a connecting rod to extend an impact gun into a heat transfer pipe or pull the impact gun out of the heat transfer pipe;
the ultrasonic generator outputs power to an ultrasonic transducer in the impact gun, the ultrasonic transducer converts received electric energy into mechanical power, and the amplitude-variable vibration rod amplifies mass point displacement of mechanical vibration and transmits the amplified mechanical power to the impact rod;
the impact rod extends into the impact pin hole, and the impact pin on the impact pin carrier applies impact force to the surface of the inner wall of the heat transfer pipe to carry out ultrasonic shot peening strengthening treatment;
and a second driving motor of the machine tool drives the connecting rod to rotate and drives the impact gun to carry out full-area ultrasonic shot peening strengthening treatment on the surface of the inner wall of the heat transfer pipe.
The ultrasonic shot blasting machine tool for the heat transfer pipe of the steam generator has the following advantages:
first, the first driving motor of the steam generator heat transfer pipe ultrasonic shot blasting machine tool drives the first lead screw to drive the connecting rod arranged on the first supporting arm to extend the impact gun into the heat transfer pipe on the rack to carry out ultrasonic shot blasting strengthening treatment on the surface of the inner wall of the heat transfer pipe, the second driving motor rotates the connecting rod to drive the impact gun to rotate around the axial direction of the heat transfer pipe so as to carry out all-dimensional ultrasonic shot blasting strengthening treatment without dead angles on the surface of the inner wall of the heat transfer pipe, because the whole treatment process is set on a control console, the functions of the first driving motor, the second driving motor and the impact gun are matched in order, the effect of high-efficiency and high-precision ultrasonic shot blasting strengthening treatment on the surface of the inner wall of the heat transfer pipe is achieved, because the operation console is provided with an operation interface, an operator can simply set information to be set, the effect of convenient operation is reached, and the labor cost is also saved.
Two, thereby this steam generator heat-transfer pipe ultrasonic peening lathe's fourth drive motor drive second lead screw adjustment strikes the height of rifle, has reached and to have carried out ultrasonic peening strengthening treatment's effect to the heat-transfer pipe of different pipe diameters, and in addition, electric lift drive pulley yoke goes up and down along with the highly synchronous of strikeing the rifle, has played the support to connecting rod one end gravity bearing capacity, and whole adjustment process control platform control need not dependent manual operation to ensure the high efficiency, the high accuracy of lathe.
The impact gun of the steam generator heat transfer pipe ultrasonic shot blasting machine tool adopts the detachable tool head, and the effect of ultrasonic shot blasting strengthening treatment on the heat transfer pipes with different pipe diameters is achieved.
Drawings
FIG. 1 is a view showing the structure of an ultrasonic shot-blasting machine for heat transfer tubes of a steam generator.
FIG. 2 is an external structural view of the ultrasonic shot-blasting machine for heat transfer tubes of the steam generator.
Fig. 3 is a view showing a connection relationship between the respective mechanism components of fig. 1.
Fig. 4 is a schematic structural view of the connecting rod supporting device of fig. 1.
FIG. 5 is a schematic view of the impact gun structure of the ultrasonic peening mechanism of FIG. 1.
Fig. 6 is a schematic view showing the construction of the tool head of the impact gun shown in fig. 5.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1, an ultrasonic shot-blasting machine tool for heat transfer tubes of a steam generator comprises a machine tool body 1, a console 2, a transmission mechanism 3, an ultrasonic shot-blasting mechanism 4 and a heat transfer tube fixing mechanism 5, wherein the console 2 controls the transmission mechanism 3 on the machine tool body 1 to push or pull or rotate the ultrasonic shot-blasting mechanism 4, a shot part of the ultrasonic shot-blasting mechanism 4 extends into the inner wall surface of the heat transfer tube 6 fixed on the fixing mechanism 5 to perform shot-blasting strengthening treatment, specifically, as shown in fig. 2 to 3, a chute opening 11 is arranged at the top of the machine tool body, the console 2 comprises a controller 21 and an operation interface 22, the controller 21 is connected with a power supply of the machine tool, the operation interface 22 is connected with the controller 21, and the operation interface 22 can set the ultrasonic impact amplitude, the striker diameter and the ultrasonic shot-blasting strengthening treatment time of an, after the setting is finished, clicking a start button, the controller 21 distributes electric energy to the transmission mechanism 3 and the ultrasonic shot blasting mechanism 4, the transmission mechanism 3 comprises a first driving motor 31, a second driving motor 32, a first screw 33, two first guide rails 34, a first supporting platform 35, a supporting arm 36 and a connecting rod 37, the first driving motor 31 is fixed at one end in the machine body 1, one end of the first screw 33 is connected with a rotating shaft of the first driving motor 31, the other end is fixed on a bearing seat in the machine body 1, the two first guide rails 34 are horizontally and symmetrically arranged at the upper parts of the two sides of the first screw 33, the middle of the first supporting platform 35 is arranged on a nut mounting seat of the first screw 33, the two sides of the first screw 33 are arranged on the two first guide rails 34 and freely move along the guide rails, one end of the supporting arm 36 is fixed on the first supporting platform 35 and is perpendicular to the first screw 33, the other end of the supporting arm 36 extends out of the chute opening 11 and extends out of the machine tool body 1, the second driving motor 32 is fixed at the other end of the supporting arm 36, one end of the connecting rod 37 is connected with a rotating shaft of the second driving motor 32, the ultrasonic shot blasting mechanism 4 comprises an ultrasonic generator 41 and an impact gun 42, the ultrasonic generator 41 is arranged in the machine tool body 1, the impact gun 42 is fixed at the other end of the connecting rod 37, the ultrasonic generator 41 is connected with the controller 21, the impact gun 42 is connected with the ultrasonic generator 41, the heat transfer pipe fixing mechanism 5 comprises a rack 51 and a heat transfer pipe fixer 52, the rack 51 comprises a workbench 511 and a bracket 512 for supporting the workbench, the heat transfer pipe 6 is arranged on the workbench 511 and is opposite to the impact gun 42, and the heat transfer pipe 52 comprises a third driving motor 521, A reduction gear box 522 and a pressing arm 523, wherein a power line of the third driving motor 521 is connected to the controller 21, a power input shaft of the reduction gear box 522 is connected to a rotating shaft of the third driving motor 521, a power output shaft of the reduction gear box 522 is connected to one end of the pressing arm 523, before the inner wall surface of the heat transfer pipe 6 is strengthened, programs such as ultrasonic impact amplitude, striker diameter, ultrasonic shot peening strengthening time and the like of an ultrasonic generator are set on an operation interface 22 of the console 2, after the setting is completed, a start button on the console 2 is clicked, the controller 21 distributes electric energy to the transmission mechanism 3 and the ultrasonic shot peening mechanism 4, when the inner wall surface of the heat transfer pipe 6 is strengthened, the first driving motor 31 drives the first lead screw 33 to rotate at a set speed under the control of the controller 21, and a nut provided on the first lead screw 33 converts the rotary motion of the first lead screw 33 into a linear motion, on the first supporting platform 35 fixed mounting nut and utilize two first guide rails 34 in order to ensure the stationarity of motion, utilize the support arm 36 and the spout opening 11 at the lathe top of being connected with first supporting platform 35, push-and-pull with connecting rod 37 that heat-transfer pipe 6 length is equivalent, connecting rod 37 drives impact rifle 42 and advances forward in the interior limit intensive treatment limit of heat-transfer pipe 6 simultaneously, utilize second driving motor 32 rotatory connecting rod 37 and drive the rotatory mode of impact rifle 42 again, to the purpose of intensive treatment that the surperficial full area of heat-transfer pipe 6 inner wall does not have the dead angle.
Preferably, as shown in fig. 4, in order to adjust the height of the impact gun 42 for shot blasting heat transfer pipes with different pipe diameters, the transmission mechanism 3 further includes a height adjustment device 38 of the impact gun 42, the height adjustment device 38 includes a fourth driving motor 381, a second lead screw 382, two second guide rails 383, and a second support table 384, the fourth driving motor 381 is fixedly mounted on the first support table 35, a power line is connected to the controller 21, one end of the second lead screw 382 is connected to a rotating shaft of the fourth driving motor 381, the other end of the second lead screw 382 is mounted on a bearing seat of the support arm 36, the second lead screw 382 is perpendicular to the first lead screw 33, the two second guide rails 383 are arranged in parallel on two sides of the second lead screw 382, the middle of the second support table 384 is mounted on a mounting seat of a nut of the second lead screw 382, two sides of the second support table 384 are mounted on the two second guide rails 383, the second driving motor 32 is fixedly mounted on the second support base 384, the fourth driving motor 381 drives the second lead screw 382 to rotate at a set speed under the control of the controller 21, and the second support base 384 mounted on the nut mounting seat of the second lead screw 382 freely moves up and down along the two second guide rails 383 and is connected with the second driving motor 32 mounted on the second support base 384 and the connecting rod 37 mounted on the second driving motor 32 and the impact gun 42 to move up and down.
Preferably, as shown in fig. 4, a connecting rod supporting device 12 is disposed at an end of the top of the machine tool body opposite to the gantry, the supporting device 12 includes a pulley frame 121 and a plurality of pulleys 122 mounted on the pulley frame, and the pulley frame 121 is mounted at the top of the machine tool body 1.
Preferably, in order to further improve the precision of the shot blasting of the impact gun 42 on the inner wall surface of the heat transfer pipe 6, the support device 12 further includes an electric lifter 123, the electric lifter 123 is disposed in the machine tool body 1, a lifting rod of the electric lifter 123 is connected to the pulley holder 121, the electric lifter 123 is connected to the controller 21, and the controller 21 controls the fourth driving motor 381 to drive the impact gun 42 to adjust the height thereof up and down, and the controller 21 controls the adjustment pulley holder 13 to synchronously adjust the height of the electric lifter 123 to vertically move the impact gun 42.
As shown in fig. 5, the impact gun 42 includes a gun body 421 and a tool head 422, an ultrasonic transducer 4211, a variable amplitude vibration rod 4212 and an impact rod 4213 are arranged in the gun body 421, the variable amplitude vibration rod 4212 is arranged between the ultrasonic transducer 4211 and the impact rod 4213, the tool head 422 includes at least one striker 4221, at least one spring 4222, at least one striker carrier 4223 and a cylinder 4224, the striker 4221 is mounted on the side surface of the striker carrier 4223, the striker carrier 4223 is arranged in the cylinder 4224, the striker 4221 extends out of a through hole on the side surface of the cylinder 4224, one spring 4222 is sleeved on each striker 4221, two ends of each spring 4222 are respectively fixed on the wall surface of the cylinder 4224 and the striker carrier 4223, the cylinder 4224 is sleeved on the outer end of the gun body 421, the impact rod 4213 extends out of the gun body 421 and is freely inserted into a striker hole 42231 surrounded by the at least one striker carrier 4223, when the impact gun 42 extends into the heat transfer pipe 6, the controller 21 sends an electric signal command to the ultrasonic generator 41, the ultrasonic generator 41 outputs power to the ultrasonic transducer 4211 in the impact gun 42, the ultrasonic transducer 4211 converts the received electric energy into mechanical power, the amplitude-variable vibration rod 4212 amplifies mass point displacement of mechanical vibration and transmits the amplified mass point displacement to the impact rod 4213, and when the impact rod 4213 extends into the impact pin hole 42231, the striker 4221 on the striker carrier 4223 applies impact force to the inner wall surface of the heat transfer pipe 6 sleeved outside the impact gun 42 so as to perform ultrasonic shot peening strengthening treatment.
Preferably, as shown in fig. 6, in order to enable the impact rod 4213 to transmit impact force to the striker carrier 4223 better and further optimize the contact surface between the impact rod 4213 and the striker hole 42231 so as to obtain better impact strengthening effect, two striker carriers 4223 are arranged in the cylinder, the two striker carriers 4223 are symmetrically distributed, an outward flared bell mouth is formed at the opening of the striker hole 42231 surrounded by the two striker carriers 4223, an inner hole is formed inward along the bell mouth of the striker hole 42231, and the inner hole diameter of the striker hole 42231 is smaller than the diameter of the impact rod 4213.
Further preferably, in order to maximize the impact force transmitted from the impact rod 4213 to the striker 4221, the front end of the impact rod 4213 is tapered such that the taper of the front end of the impact rod 4213 first passes through the bell mouth of the striker hole 42231, the taper of the front end of the impact rod 4213 extends along the inclined plane of the bell mouth of the striker hole 42231 to the inner hole along the striker hole 42231, and the impact rod 4213 pushes the striker 4221 of the two striker carriers 4223 against the inner wall surface of the heat transfer pipe 6 because the diameter of the impact rod 4213 is larger than the inner hole diameter of the striker 4221.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The utility model provides a steam generator heat-transfer pipe supersound peening lathe which characterized in that: the ultrasonic shot blasting machine tool for the heat transfer pipe of the steam generator comprises a machine tool body (1), a control console (2), a transmission mechanism (3), an ultrasonic shot blasting mechanism (4) and a heat transfer pipe fixing mechanism (5), wherein a sliding groove opening (11) is formed in the top of the machine tool body (1);
the console (2) comprises a controller (21) and an operation interface (22), the controller (21) is connected with a power supply, and the operation interface (22) is connected with the controller (21);
the transmission mechanism (3) comprises a first driving motor (31), a second driving motor (32), a first lead screw (33), two first guide rails (34), a first supporting platform (35), a supporting arm (36) and a connecting rod (37), wherein the first driving motor (31) is fixed at one end in the machine tool body (1), two ends of the first lead screw (33) are respectively connected to a rotating shaft of the first driving motor (31) and a bearing seat in the machine tool body (1), the two first guide rails (34) are horizontally arranged in the machine tool body (1) and symmetrically distributed at two sides above the first lead screw (33), the middle part of the first supporting platform (35) is arranged on the first lead screw (33), the upper part of the first supporting platform (35) is arranged on the two first guide rails (34), one end of the supporting arm (36) is fixed on the first supporting platform (35) and is perpendicular to the first lead screw (33), the other end of the supporting arm (36) extends out of the sliding groove opening (11) and extends out of the machine tool body (1), the second driving motor (32) is fixed at the other end of the supporting arm (36), the connecting rod (37) is arranged above the sliding groove opening (11) in parallel, and one end of the connecting rod is connected with a rotating shaft of the second driving motor (32);
the ultrasonic shot blasting mechanism (4) comprises an ultrasonic generator (41) and an impact gun (42), the ultrasonic generator (41) is placed in the lathe body (1), the impact gun (42) is fixed to the other end of the connecting rod (37), the ultrasonic generator (41) is connected with the controller (21), and the impact gun (42) is connected with the ultrasonic generator (41);
the heat transfer pipe fixing mechanism (5) comprises a rack (51) and a heat transfer pipe fixing device (52), wherein the rack (51) comprises a workbench (511) opposite to an impact gun (42) at one end of the machine tool body (1) and a support (512) for supporting the workbench (511), a heat transfer pipe (6) is placed on the workbench (511) and opposite to the impact gun (42), the heat transfer pipe fixing device (52) comprises a third driving motor (521), a reduction gear box (522) and a pressing arm (523), the third driving motor (521) is connected with the controller (21), a power input shaft of the reduction gear box (522) is connected with a rotating shaft of the third driving motor (521), and a power output shaft of the reduction gear box (522) is connected with one end of the pressing arm (523).
2. The steam generator heat transfer tube ultrasonic peening machine of claim 1, wherein: the transmission mechanism (3) further comprises a height adjusting device (38) of the impact gun (42), the height adjusting device (38) comprises a fourth driving motor (381), a second lead screw (382), two second guide rails (383) and a second support platform (384), the fourth driving motor (381) is fixedly installed on the first support platform (35) and is connected with the controller (21), two ends of the second lead screw (382) are respectively connected to a rotating shaft of the fourth driving motor (381) and a bearing seat of the support arm (36), the second lead screw (382) is perpendicular to the first lead screw (33), the two second guide rails (383) are arranged on two sides of the second lead screw (382) in parallel, the middle of the second support platform (384) is installed on the second lead screw (382), two sides of the second support platform (384) are installed on the two second guide rails (383), the second drive motor (32) is fixedly mounted on a second support stage (384).
3. The steam generator heat transfer tube ultrasonic peening machine of claim 1, wherein: one end of the machine tool body (1) is provided with a supporting device (12) of a connecting rod (37), and the supporting device (12) comprises a pulley yoke (121) and a plurality of pulleys (122) arranged on the pulley yoke (121).
4. The steam generator heat transfer tube ultrasonic peening machine of claim 3, wherein: the supporting device (12) further comprises an electric lifter (123), the electric lifter (123) is arranged in the machine tool body (1), a lifting rod of the electric lifter (123) is connected with the pulley yoke (121), and the electric lifter (123) is connected with the controller (21).
5. The steam generator heat transfer tube ultrasonic peening machine of claim 1, wherein: the impact gun (42) comprises a gun body (421) and a tool head (422), an ultrasonic transducer (4211), an amplitude vibration rod (4212) and an impact rod (4213) are arranged in the gun body (421), the amplitude vibration rod (4212) is arranged between the ultrasonic transducer (4211) and the impact rod (4213), the tool head (422) comprises at least one firing pin (4221), at least one spring (4222), at least one firing pin carrier (4223) and a cylinder (4224), the firing pin (4221) is installed on the side surface of the firing pin carrier (4223), the firing pin carrier (4223) is arranged in the cylinder (4224), the firing pin (4221) extends out of a through hole in the side surface of the cylinder (4224), one spring (4222) is sleeved outside each firing pin (4221), two ends of each spring (4222) are respectively fixed on the surface of the cylinder wall of the cylinder (4224) and the firing pin carrier (4223), the cylinder (4224) is sleeved at the outer end of the gun body (421), the striking rod (4213) protrudes from the gun body (421) and is freely inserted into a striking hole (42231) surrounded by at least one striking pin carrier (4223).
6. The steam generator heat transfer tube ultrasonic peening machine of claim 5, wherein: the front end of the impact rod (4213) is conical.
7. The steam generator heat transfer tube ultrasonic peening machine of claim 5, wherein: the opening of the bumping hole (42231) forms an outward-expanding horn mouth, and the diameter of the inner hole of the bumping hole (42231) is smaller than that of the impact rod (4213).
8. The steam generator heat transfer tube ultrasonic peening machine of claim 5, wherein: two firing pin carriers (4223) are arranged in the cylinder (4224), and the two firing pin carriers (4223) are symmetrically distributed.
9. The steam generator heat transfer tube ultrasonic peening machine of claim 6, wherein: when the impact rod (4213) is inserted into the impact pin hole (42231), the impact force is applied to the inner wall surface of the heat transfer pipe (6) sleeved outside the impact gun (42) by the striker (4221) on the striker carrier (4223).
10. The shot blasting method of the steam generator heat transfer tube ultrasonic shot blasting machine tool according to any one of claims 1 to 9, characterized by comprising:
fixing the heat transfer pipe (6) on a rack (51) and opposite to the impact gun (42);
a first driving motor (31) of the machine tool drives a first lead screw (33) to rotate, and a first supporting platform (35) moves on the first lead screw (33) and drives a connecting rod (37) to extend an impact gun (42) into a heat transfer pipe (6);
the ultrasonic generator (41) outputs power to an ultrasonic transducer (4211) in the impact gun (42), the ultrasonic transducer (4211) converts received electric energy into mechanical power, and the amplitude-variable vibration rod (4212) amplifies mass point displacement of mechanical vibration and transmits the amplified mass point displacement to the impact rod (4213);
the impact rod (4213) extends into the impact pin hole (42231), and the impact pin (4221) on the impact pin carrier (4223) applies impact force to the inner wall surface of the heat transfer pipe (6) to carry out ultrasonic shot peening strengthening treatment;
a second driving motor (32) of the machine tool drives a connecting rod (37) to rotate and drives an impact gun (42) to rotate so as to carry out full-area ultrasonic shot peening strengthening treatment on the surface of the inner wall of the heat transfer pipe (6); and
after the ultrasonic shot peening strengthening treatment is finished, a first driving motor (31) of the machine tool drives a first lead screw (33) to rotate, and a first supporting table (35) moves on the first lead screw (33) and drives a connecting rod (37) to pull an impact gun (42) out of a heat transfer pipe (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811368459.1A CN109554527B (en) | 2018-11-16 | 2018-11-16 | Ultrasonic shot blasting machine tool for heat transfer pipe of steam generator and shot blasting method thereof |
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| CN201811368459.1A CN109554527B (en) | 2018-11-16 | 2018-11-16 | Ultrasonic shot blasting machine tool for heat transfer pipe of steam generator and shot blasting method thereof |
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| CN109554527B true CN109554527B (en) | 2020-07-24 |
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|---|---|---|---|---|
| JP4985644B2 (en) * | 2005-05-12 | 2012-07-25 | ゼネラル・エレクトリック・カンパニイ | Ultrasonic peening treatment of assembled parts |
| CN102513942A (en) * | 2011-12-16 | 2012-06-27 | 南京航空航天大学 | Supersonic shot-peening forming method for single or double curvature integral panels |
| CN203343904U (en) * | 2013-05-27 | 2013-12-18 | 天津天东恒科技发展有限公司 | Multi-pin impact head for ultrasonic impact gun |
| CN104878176B (en) * | 2015-06-25 | 2017-02-22 | 南通河海大学海洋与近海工程研究院 | Rod-shaped metal material surface self-nanocrystallization device |
| CN205990431U (en) * | 2016-09-13 | 2017-03-01 | 中电科芜湖钻石飞机制造有限公司 | It is suitable to the ultrasound wave shot blasting equipment of round metal tubular structural member inner wall shot blasting process |
| CN106514497A (en) * | 2016-12-26 | 2017-03-22 | 郑州诚合信息技术有限公司 | High-quality integrated machining device of pipe |
| CN107336142B (en) * | 2017-08-09 | 2019-03-19 | 山东大学 | A kind of device and method of electromagnetism assisting ultrasonic shot-peening |
| CN107443255B (en) * | 2017-09-18 | 2023-08-11 | 安徽省宣城市永健机械有限公司 | Axle type part peening equipment |
| CN108239694B (en) * | 2018-02-24 | 2019-08-02 | 沈阳远大装备科技有限公司 | A kind of ultrasonic impact shot-blast unit |
-
2018
- 2018-11-16 CN CN201811368459.1A patent/CN109554527B/en active Active
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