CN115011770A - Shot type ultrasonic impact strengthening device of round test bar and using method thereof - Google Patents
Shot type ultrasonic impact strengthening device of round test bar and using method thereof Download PDFInfo
- Publication number
- CN115011770A CN115011770A CN202210659136.8A CN202210659136A CN115011770A CN 115011770 A CN115011770 A CN 115011770A CN 202210659136 A CN202210659136 A CN 202210659136A CN 115011770 A CN115011770 A CN 115011770A
- Authority
- CN
- China
- Prior art keywords
- test bar
- round
- tooth
- hole
- toothed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 156
- 238000005728 strengthening Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000008188 pellet Substances 0.000 claims abstract description 24
- 230000000694 effects Effects 0.000 claims abstract description 18
- 230000005653 Brownian motion process Effects 0.000 claims description 6
- 230000002929 anti-fatigue Effects 0.000 claims description 6
- 238000005537 brownian motion Methods 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 5
- 239000006187 pill Substances 0.000 claims description 5
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 210000000988 bone and bone Anatomy 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000005480 shot peening Methods 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 238000005422 blasting Methods 0.000 description 4
- 230000003116 impacting effect Effects 0.000 description 3
- 238000005457 optimization Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to the technology of part surface treatment, and relates to a pellet type ultrasonic impact strengthening device of a round test bar and a using method thereof. Comprises a bottom plate (1), an amplitude transformer (2), an ultrasonic vibration source (3), a pellet cavity (4), a toothed round test bar (5), a toothed round test bar (6), a test bar rotating mechanism (7) and a pellet (8); according to the invention, the working section of the round test rod is wrapped and sealed in the pellet cavity groove, and the impact strength and the times of the pellets on the surface of the round test rod along the length direction are increased and the strengthening effect uniformity along the length direction is improved through the shape and the size of the pellet cavity and the proper size and number of the pellets. The round bar is rotated along the circumferential direction through the test bar rotating mechanism, so that the impact force and the times of the shot to the circumferential direction are improved, and the uniformity of the strengthening effect of the whole surface is improved.
Description
Technical Field
The invention belongs to the technology of part surface treatment, and relates to a pellet type ultrasonic impact strengthening device of a round test bar and a using method thereof.
Background
The shot type ultrasonic impact strengthening is used as a novel surface strengthening technology and has the advantages of high energy, high efficiency, no pollution and the like. The ultrasonic impact strengthening adopts an ultrasonic source, the amplitude of the ultrasonic source is amplified through an amplitude transformer, and the shot is driven to do high-speed and brownian motion, so that the impact on the surface of the metal part is realized, and a surface residual compressive stress layer and a microstructure strengthening layer are formed on the surface of the part, thereby improving the fatigue resistance of the part. When a mortise ultrasonic impact strengthening process is researched and developed, in order to represent the influence rule of different process parameters on fatigue performance, a circular fatigue test bar is needed for simulation research. However, since the outer surface of the circular test bar has characteristics of large curvature, variable cross-section, etc., it is difficult to obtain uniform reinforcement effect on the surface of the test bar in the lengthwise direction and the circumferential direction when the number of shots is small. The traditional shot peening method adopts a method of driving the shot by high-pressure gas, fixing the spray gun and rotating the round rod, but the method has the defects that the number of the shot used is large, the shot peening intensity generated by driving the shot by the high-pressure gas is limited, and the effect of ultrasonic impact peening of a mortise is difficult to simulate. The CN113736986A patent discloses a multi-axis moving ultrasonic impact strengthening precision machining platform, and the ultrasonic impact method adopted by the method is a striker type, and the number of the strikers is single, so that the simulation strengthening of the ultrasonic impact strengthening of the mortise cannot be realized. The CN113736969A patent discloses a dual-purpose ultrasonic shot peening strengthening device for round rods and flat test pieces, and the CN112680579A patent discloses an ultrasonic shot peening strengthening device for round rods and test pieces, wherein the shapes of shot blasting chambers of the two devices are simpler, the motion tracks of shots in the shot blasting chambers are obviously different from the tracks in real mortises, and the strengthening effect of the tenon tooth parts of the mortises cannot be simulated.
Disclosure of Invention
The invention provides a round test bar projectile type ultrasonic impact strengthening device and a using method thereof, and aims to simulate the movement track of a projectile in a mortise cavity, simulate the state of a tenon tooth of a mortise after being impacted by the projectile by adopting a rotating round test bar, test the fatigue life or the limit after surface treatment, evaluate the ultrasonic impact strengthening effect and provide support for the optimization of a turbine disc mortise ultrasonic shot blasting process.
The technical scheme of the invention is as follows:
a shot type ultrasonic impact strengthening device of a round test bar comprises a bottom plate 1, an amplitude transformer 2, an ultrasonic vibration source 3, a shot cavity 4, a toothed round test bar 5, a toothed round test bar 6, a test bar rotating mechanism 7 and a shot 8; a square through hole is formed in the center of the bottom plate 1, a tool head at the upper end of the amplitude transformer 2 is inserted into the through hole, and the tool head is square, coaxial with the through hole and in clearance fit with the through hole; the lower end of the amplitude transformer 2 is connected with the ultrasonic vibration source 3 through threads; the shot cavity 4 is of a cuboid structure and consists of a wall plate 401, a tongue-and-groove inner cavity 402, a bottom square hole 403, two right side face one tooth round holes 404, two left side face one tooth round holes 405, two right side face two tooth round holes 406, two left side face two tooth round holes 407 and a fixed base 408; the shape of the bottom square hole 403 is the same as the side length of the through hole in the center of the bottom 1; a right side tooth round hole 404 and a left side tooth round hole 405 are on the same plane of the upper part of the shot cavity 4, a right side tooth round hole 406 and a left side tooth round hole 407 are on the same plane of the lower part of the shot cavity 4, and the upper surface of the bottom plate 1 is fixedly connected with a fixed base 408; 2 one-tooth round test bars 5 are distributed in a right side face one-tooth round hole 404 and a left side face one-tooth round hole 405 on the upper part of the shot cavity 4 in parallel, and 2 two-tooth round test bars 6 are distributed in a right side face two-tooth round hole 406 and a left side face two-tooth round hole 407 on the lower part of the shot cavity 4 in parallel; a tooth round test bar 5 and a two-tooth round test bar 6 are divided into a middle working section and clamping sections at two ends, the right end clamping section is in clearance fit with a right side tooth round hole 404 and a right side tooth round hole 406 respectively, the left end clamping section penetrates through a left side tooth round hole 405 and a left side tooth round hole 407 to be connected with the right end of the test bar rotating mechanism 7, and spherical projectiles 8 are placed in the projectile cavity 4. The side length of the tool head is 0.05-0.5 mm smaller than that of the through hole.
The side length of the tool head is 0.05-0.5 mm smaller than that of the through hole.
The size of the mortise type inner cavity 402 of the shot cavity 4 is 1-10 times of that of the turbine disc.
The number of unable adjustment base 408 is 2, and the middle part has the bolt hole, and the upper surface of bottom plate 1 passes through bolted connection with unable adjustment base 408 and fixes.
The two-tooth round test bar 5 and the two-tooth round test bar 6 are in a dog bone shape with a thin middle part and thick two ends, have the total length not less than [ a +2e + (10-20) ] mm, and are divided into a middle working section and clamping sections at two ends.
The shot 8 is 0.5-2 mm in diameter and is made of cast steel shots or ceramic shots.
The diameter of the working section of the toothed circular test bar 5 and the working section of the toothed circular test bar 6 is 1-10 mm smaller than that of the clamping section, and the length of the working section is not more than the side length of the bottom square hole 403.
The length a of the inner cavity 402 is 40-50 mm, the width is 10-30 mm, and the height b is 12-28 mm; the side length c of the bottom square hole 403 is 20-25 mm; the diameters d of the right side one-tooth round hole 404, the left side one-tooth round hole 405, the right side two-tooth round hole 406 and the left side two-tooth round hole 407 are 4-10 mm, and the thickness e of the wall plate is 2-4 mm; the number N of the shots is 10-100.
A use method of a bullet type ultrasonic impact strengthening device of a round test bar,
1) selecting a pill with the diameter of n according to the anti-fatigue requirements of the one-tooth round test bar 5 and the two-tooth round test bar 6;
2) placing the projectile into the projectile cavity 4 from the side circular hole 406;
3) inserting a toothed round test bar 5 into a right side toothed round hole 404, penetrating out of a right side toothed round hole 405, inserting a toothed round test bar 6 into a right side toothed round hole 406, penetrating out of a right side toothed round hole 407, and inserting the two toothed round test bars into the right end of the test bar rotating mechanism 7;
4) starting a power supply of the test stick rotating mechanism 7, and rotating the toothed round test stick 5 along the axis at a rotating speed of v circles/minute;
5) starting a power supply of an ultrasonic vibration source 3, driving the shot to move by an amplitude transformer 2, performing high-speed brownian motion in a shot cavity 4, impacting the surfaces of a toothed circular test bar 5 and a toothed circular test bar 6, and sequentially closing the power supply of the ultrasonic vibration source 3 and the power supply of a test bar rotating mechanism 7 when the time t is 20-120 s;
6) and drawing out the round test bar 5 with one tooth and the round test bar 6 with two teeth, testing the high-temperature rotary bending fatigue life or limit, comparing with the untreated test bar, and evaluating the ultrasonic impact strengthening effect.
The rotating speed v of the one-tooth round test bar 5 and the two-tooth round test bar 6 is 1-100 circles/minute; the time t is 10-600 s; the diameter t of the pill is 0.6-2 mm.
The invention has the advantages that:
(1) through the shot die cavity of design unanimous with the tongue-and-groove shape, the motion state of simulation shot in the tongue-and-groove, simultaneously, the size of increase shot die cavity, place circular test bar in tongue-and-groove stress surface position, the effect of simulation stress surface by the shot striking to examine ultrasonic shock strengthening effect also provides the basis for adopting circular test bar to examine antifatigue effect.
(2) Through the size of increase pellet die cavity, make the length of side of tool head roughly the same with the working length of circular test bar, the motion state of simulation pellet in the tongue-and-groove to the suitable pellet size of collocation, quantity increase pellet along length direction to the striking dynamics and the number of times on circular test bar surface, improve along length direction's intensive effect homogeneity.
(3) The round bar is rotated along the circumferential direction through the round test bar rotating mechanism, so that the impact force and the times of the shot to the circumferential direction are improved, and the uniformity of the strengthening effect of the whole surface is improved.
(4) The method only consumes a small number of shots (10-100), is far less than the traditional shot peening strengthening, and has the advantages of lower processing cost, less dust amount and lower noise.
(5) The ultrasonic frequency is as high as 20-25 KHz, and the resonance frequency of the amplitude transformer is as high as 18-21 KHz, so that the surface strengthening processing efficiency is high.
Drawings
FIG. 1 is a schematic view of the entire apparatus
FIG. 2 is a schematic diagram showing the dimensions of a shot-shaped cavity groove
FIG. 3 side view of a projectile cavity
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1-3, a pellet-type ultrasonic impact strengthening device for a round test bar comprises a bottom plate 1, an amplitude transformer 2, an ultrasonic vibration source 3, a pellet cavity 4, a toothed round test bar 5, a two-tooth round test bar 6, a test bar rotating mechanism 7 and a pellet 8; a square through hole is formed in the center of the bottom plate 1, a tool head at the upper end of the amplitude transformer 2 is inserted into the through hole, and the tool head is square, coaxial with the through hole and in clearance fit with the through hole; the lower end of the amplitude transformer 2 is connected with the ultrasonic vibration source 3 through threads; the shot cavity 4 is of a cuboid structure and consists of a wall plate 401, a tongue-and-groove inner cavity 402, a bottom square hole 403, two right side face one tooth round holes 404, two left side face one tooth round holes 405, two right side face two tooth round holes 406, two left side face two tooth round holes 407 and a fixed base 408; the shape of the bottom square hole 403 is the same as the side length of the through hole in the center of the bottom 1; a right side tooth round hole 404 and a left side tooth round hole 405 are on the same plane of the upper part of the shot cavity 4, a right side tooth round hole 406 and a left side tooth round hole 407 are on the same plane of the lower part of the shot cavity 4, and the upper surface of the bottom plate 1 is fixedly connected with a fixed base 408; 2 one-tooth round test bars 5 are distributed in a right side-tooth round hole 404 and a left side-tooth round hole 405 on the upper part of the shot cavity 4 in parallel, and 2 two-tooth round test bars 6 are distributed in a right side-tooth round hole 406 and a left side-tooth round hole 407 on the lower part of the shot cavity 4 in parallel; a circular test rod of tooth 5 and the circular test rod of two teeth 6 divide into the working section in the middle of and the centre gripping section at both ends, right-hand member centre gripping section respectively with a right flank tooth round hole 404, right flank tooth round hole 406 is clearance fit, left end centre gripping section passes a left surface tooth round hole 405 and left flank tooth round hole 407 and is connected with test rod rotary mechanism 7's right-hand member, place spherical shot 8 in the shot die cavity 4, shot 8, the diameter is phi 0.5 ~ 2mm, the material is cast steel shot or ceramic ball, the quantity N of shot 10 ~ 100. The side length of the tool head at the upper end of the amplitude transformer 2 is 0.05-0.5 mm smaller than that of the through hole.
The number of unable adjustment base 408 is 2, and the middle part has the bolt hole, and the upper surface of bottom plate 1 passes through bolted connection with unable adjustment base 408 and fixes.
The two-tooth round test bar 5 and the two-tooth round test bar 6 are in a dog bone shape with a thin middle part and thick two ends, have the total length not less than [ a +2e + (10-20) ] mm, and are divided into a middle working section and clamping sections at two ends.
The diameter of the working section of the toothed circular test bar 5 and the working section of the toothed circular test bar 6 is 1-10 mm smaller than that of the clamping section, and the length of the working section is not more than the side length of the bottom square hole 403.
The size of the mortise-type inner cavity 402 is 1-10 times of that of a mortise of the turbine disc, the length is 40-50 mm, the width is 10-30 mm, and the height is 12-28 mm; the side length c of the bottom square hole 403 is 20-25 mm; the diameters d of the right side one-tooth round hole 404, the left side one-tooth round hole 405, the right side two-tooth round hole 406 and the left side two-tooth round hole 407 are 4-10 mm, and the thickness e of the wall plate is 2-4 mm.
A use method of a bullet type ultrasonic impact strengthening device of a round test bar,
1) selecting a pill with the diameter of n according to the anti-fatigue requirements of the one-tooth round test bar 5 and the two-tooth round test bar 6;
2) placing the projectile into the projectile cavity 4 from the side circular hole 406;
3) inserting a toothed round test bar 5 into a right side toothed round hole 404, penetrating out of a right side toothed round hole 405, inserting a toothed round test bar 6 into a right side toothed round hole 406, penetrating out of a right side toothed round hole 407, and inserting the two toothed round test bars into the right end of the test bar rotating mechanism 7;
4) starting a power supply of the test stick rotating mechanism 7, and rotating the toothed round test stick 5 along the axis at the rotating speed of v circles/minute;
5) starting a power supply of an ultrasonic vibration source 3, driving the shot to move by an amplitude transformer 2, performing high-speed brownian motion in a shot cavity 4, impacting the surfaces of a toothed circular test bar 5 and a toothed circular test bar 6, and sequentially closing the power supply of the ultrasonic vibration source 3 and the power supply of a test bar rotating mechanism 7 when the time t is 20-120 s;
6) and drawing out a toothed round test bar 5 and a toothed round test bar 6, testing the high-temperature rotary bending fatigue life or limit, comparing with an untreated test bar, and evaluating the ultrasonic impact strengthening effect.
The working principle of the invention is as follows:
ultrasonic waves have the advantages of high frequency, high energy, high power density and the like, and are one of ideal power sources for high-energy surface strengthening. In order to realize the surface deformation strengthening of the mortise, the problem of structural interference can be solved by adopting shot type ultrasonic impact strengthening, and the method is an effective way for strengthening the surface of the mortise. However, in the process of screening the process, in order to check different process parameters, the invention utilizes the movement of the hard projectile in the ultrasonic source excitation cavity to make the projectile perform high-speed irregular movement. The working section of the round test rod is wrapped and sealed in the shot cavity groove, the shot cavity is reasonably designed in shape and size, and the shot size and number are matched, so that the impact force and times of the shot on the surface of the round test rod along the length direction are increased, and the strengthening effect uniformity along the length direction is improved. The round bar is rotated along the circumferential direction through the test bar rotating mechanism, so that the impact force and the times of the shot to the circumferential direction are improved, and the uniformity of the strengthening effect of the whole surface is improved. Thus, it is ensured that the reinforcing effect of the surface of the round test bar is uniform. And testing the fatigue life or the limit after the surface treatment, evaluating the ultrasonic impact strengthening effect, and providing support for the optimization of the turbine disc mortise ultrasonic shot blasting process.
Example 1:
the side length of the tool head is 19.5mm, which is 0.05mm smaller than the side length (20mm) of the through hole. The length a of the inner cavity 402 is 50mm, the width w is 30mm, and the height b is 20 mm; the bottom square hole 403 is square, and has a side length c of 20mm, which is the same as the side length of the through hole in the center of the bottom 1. The diameters of the right side face one-tooth round hole 404, the left side face one-tooth round hole 405, the right side face two-tooth round hole 406 and the left side face two-tooth round hole 407 are all d equal to 6mm, the diameters are symmetrically distributed on two side faces of the projectile cavity 4, the heights of the centers of the right side face one-tooth round hole 404 and the left side face one-tooth round hole 405 from the bottom face of the projectile cavity 4 are g equal to 15mm, and the heights of the centers of the right side face one-tooth round hole 404 and the left side face two-tooth round hole 405 from the bottom face of the projectile cavity 4 are f equal to 9 mm; the test device comprises a toothed circular test bar 5 and a toothed circular test bar 6, wherein the toothed circular test bar and the toothed circular test bar are divided into a middle working section and clamping sections at two ends, the total length is 74mm, the diameter of the working section is 5.75mm, the diameter of the clamping section is 3.75mm, and the length of the working section is 20 mm; the clamping section is in clearance fit with a right side circular tooth hole 404, a left side circular tooth hole 405, a right side circular tooth hole 406 and a left side circular tooth hole 407 respectively, and the fit clearance is 0.1 mm. The left ends of the round test bar 5 and the round test bar 6 are connected with the right end of the test bar rotating mechanism 6, and the rotating speed is 100 circles/minute. Spherical balls 8 are placed in the ball cavity 4, the number of the balls is 100, the diameter of the balls is 2mm, and the balls are made of ceramic balls. The size of the shot cavity 4 is 1 time of that of a mortise of a real turbine disc.
(1) According to the anti-fatigue requirements of the one-tooth round test bar 5 and the two-tooth round test bar 6, the shot with the diameter of 2mm is selected.
(2) The projectile is placed into the projectile cavity 4 from the side circular aperture 406.
(3) A test rod 5 of a toothed circle shape is inserted into the round hole 404 of a toothed circle on the right side and penetrates out of the round hole 405 of a toothed circle on the right side, and a test rod 6 of a toothed circle shape is inserted into the round hole 406 of a toothed circle on the right side and penetrates out of the round hole 407 of a toothed circle on the right side, and both are inserted into the right end of the test rod rotating mechanism 7.
(4) And starting a power supply of the test stick rotating mechanism 7, and rotating the circular test stick 5 along the axis at the rotating speed of v circles/minute.
(5) And (3) starting a power supply of the ultrasonic vibration source 3, driving the shot to move by the amplitude transformer 2, performing high-speed Brownian motion in the shot cavity 4, impacting the surfaces of a toothed circular test bar 5 and a toothed circular test bar 6, and sequentially closing the power supply of the ultrasonic vibration source 3 and the power supply of the test bar rotating mechanism 7 when the time t is up to 20 s.
(6) And drawing out the round test bar 5 with one tooth and the round test bar 6 with two teeth, testing the high-temperature rotary bending fatigue life or limit at 600 ℃, comparing with the untreated test bar, and evaluating the ultrasonic impact strengthening effect.
Example 2
(1) According to the anti-fatigue requirement of the round test bar 5, the shot with the diameter n of 1mm is selected.
(4) And starting a power supply of the test stick rotating mechanism 6, and rotating the circular test stick 5 along the axis at the rotating speed of 1 circle/minute.
(5) The power of the ultrasonic vibration source 3 is started, the amplitude transformer 2 drives the shot to move, high-speed brownian motion is carried out in the shot cavity 4, the surfaces of the toothed circular test bar 5 and the toothed circular test bar 6 are impacted, and when the time t is 600s, the power of the ultrasonic vibration source 3 and the power of the test bar rotating mechanism 6 are sequentially closed.
Claims (10)
1. The utility model provides a pellet formula supersound impact strengthening device of circular test bar which characterized in that: comprises a bottom plate (1), an amplitude transformer (2), an ultrasonic vibration source (3), a pellet cavity (4), a toothed round test bar (5), a toothed round test bar (6), a test bar rotating mechanism (7) and a pellet (8); a square through hole is formed in the center of the bottom plate (1), a tool head at the upper end of the amplitude transformer (2) is inserted into the through hole, and the tool head is square, coaxial with the through hole and in clearance fit with the through hole; the lower end of the amplitude transformer (2) is connected with the ultrasonic vibration source (3) through threads; the shot cavity (4) is of a cuboid structure and consists of a wall plate (401), a tongue-and-groove inner cavity (402), a bottom square hole (403), two right side face one tooth round holes (404), two left side face one tooth round holes (405), two right side face two tooth round holes (406), two left side face two tooth round holes (407) and a fixed base (408); the shape of the bottom square hole (403) is the same as the side length of the through hole in the center of the bottom 1; a right side tooth round hole 404 and a left side tooth round hole (405) are arranged on the same plane at the upper part of the shot cavity (4), a right side tooth round hole (406) and a left side tooth round hole (407) are arranged on the same plane at the lower part of the shot cavity (4), and the upper surface of the bottom plate (1) is fixedly connected with a fixed base (408); 2 one-tooth round test rods (5) are distributed in a right side face one-tooth round hole 404 and a left side face one-tooth round hole (405) on the upper part of the shot cavity (4) in parallel, and 2 two-tooth round test rods (6) are distributed in a right side face two-tooth round hole (406) and a left side face two-tooth round hole (407) on the lower part of the shot cavity (4) in parallel; a tooth round test bar (5) and a two-tooth round test bar (6) are divided into a middle working section and clamping sections at two ends, the right end clamping section is in clearance fit with a right side tooth round hole (404) and a right side tooth round hole (406) respectively, the left end clamping section penetrates through a left side tooth round hole (405) and a left side tooth round hole (407) to be connected with the right end of a test bar rotating mechanism (7), and spherical projectiles (8) are placed in a projectile cavity (4).
2. The pellet type ultrasonic impact strengthening device of the round test bar as claimed in claim 1, wherein: the side length of the tool head is 0.05-0.5 mm smaller than that of the through hole.
3. The pellet type ultrasonic impact strengthening device of the round test bar as claimed in claim 1, wherein: the size of the mortise type inner cavity (402) of the shot cavity (4) is 1-10 times of that of the turbine disc.
4. The pellet type ultrasonic impact strengthening device of the round test bar as claimed in claim 1, wherein: the number of unable adjustment base (408) is 2, and the middle part has the bolt hole, and the upper surface of bottom plate (1) passes through bolted connection with unable adjustment base (408) and fixes.
5. The pellet type ultrasonic impact strengthening device of the round test bar as claimed in claim 1, wherein: the two-tooth round test bar (5) and the two-tooth round test bar (6) are in a dog bone shape with a thin middle part and thick two ends, the total length is not less than [ a +2e + (10-20) ] mm, and the two-tooth round test bar are divided into a middle working section and clamping sections at two ends.
6. The pellet type ultrasonic impact strengthening device of the round test bar as claimed in claim 1, wherein: the shot 8 is 0.5-2 mm in diameter and made of cast steel shots or ceramic shots.
7. The pellet type ultrasonic impact strengthening device of the round test bar as claimed in claim 1, wherein: the diameter of the working section of the toothed circular test bar 5 and the working section of the toothed circular test bar 6 is 1-10 mm smaller than that of the clamping section, and the length of the working section is not more than the side length of the bottom square hole 403.
8. The shot type ultrasonic impact strengthening device of the round test bar according to claim 1, characterized in that: the length a of the inner cavity 402 is 40-50 mm, the width is 10-30 mm, and the height b is 12-28 mm; the side length c of the bottom square hole 403 is 20-25 mm; the diameters d of the right side one-tooth round hole 404, the left side one-tooth round hole 405, the right side two-tooth round hole 406 and the left side two-tooth round hole 407 are 4-10 mm, and the thickness e of the wall plate is 2-4 mm; the number N of the shots is 10-100.
9. The use method of the shot type ultrasonic impact strengthening device of the round test bar according to any one of the claims 1 to 8, is characterized in that:
1) selecting a pill with the diameter of n according to the anti-fatigue requirements of the one-tooth round test bar (5) and the two-tooth round test bar (6);
2) putting the projectile into the projectile cavity (4) from the side round hole (406);
3) inserting a toothed round test bar (5) into a toothed round hole (404) on the right side and penetrating out of a toothed round hole (405) on the right side, inserting a toothed round test bar (6) into a toothed round hole (406) on the right side and penetrating out of a toothed round hole (407) on the right side, and inserting the toothed round test bar and the toothed round test bar into the right end of a test bar rotating mechanism (7);
4) starting a power supply of the test stick rotating mechanism (7), and rotating the toothed round test stick (5) along the axis at the rotating speed of v circles/minute;
5) the method comprises the following steps that a power supply of an ultrasonic vibration source (3) is started, an amplitude transformer (2) drives a projectile to move, high-speed brownian motion is conducted in a projectile cavity (4), the surface of a toothed circular test bar (5) and the surface of a toothed circular test bar (6) are impacted, and when the time t is 20-120 s, the power supply of the ultrasonic vibration source (3) and the power supply of a test bar rotating mechanism (7) are sequentially turned off;
6) and drawing out the round test bar (5) with one tooth and the round test bar (6) with two teeth, testing the high-temperature rotary bending fatigue life or limit, comparing the high-temperature rotary bending fatigue life or limit with the untreated test bar, and evaluating the ultrasonic impact strengthening effect.
10. The use method of the pellet type ultrasonic impact strengthening device of the round test bar according to claim 9, is characterized in that: the rotating speed v of the one-tooth round test bar (5) and the two-tooth round test bar (6) is 1-100 circles/minute; the time t is 10-600 s; the diameter t of the pill is 0.6-2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210659136.8A CN115011770A (en) | 2022-06-10 | 2022-06-10 | Shot type ultrasonic impact strengthening device of round test bar and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210659136.8A CN115011770A (en) | 2022-06-10 | 2022-06-10 | Shot type ultrasonic impact strengthening device of round test bar and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115011770A true CN115011770A (en) | 2022-09-06 |
Family
ID=83074665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210659136.8A Pending CN115011770A (en) | 2022-06-10 | 2022-06-10 | Shot type ultrasonic impact strengthening device of round test bar and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115011770A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115679057A (en) * | 2022-11-16 | 2023-02-03 | 中国航发动力股份有限公司 | Fatigue test bar ultrasonic shot blasting device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004045115A (en) * | 2002-07-10 | 2004-02-12 | Ishikawajima Harima Heavy Ind Co Ltd | Peening intensity measuring method |
| US20060021410A1 (en) * | 2004-07-30 | 2006-02-02 | Sonats-Societe Des Nouvelles Applications Des Techniques De Surfaces | Shot, devices, and installations for ultrasonic peening, and parts treated thereby |
| CN111551460A (en) * | 2020-05-09 | 2020-08-18 | 中国航发北京航空材料研究院 | Test piece for testing accessibility of turbine disc mortise and evaluation method |
| CN112680579A (en) * | 2020-12-10 | 2021-04-20 | 西北工业大学 | Ultrasonic shot peening strengthening device for round bar-shaped test piece |
| CN113186378A (en) * | 2021-04-29 | 2021-07-30 | 湖南科技大学 | Shot type gear ultrasonic shot blasting strengthening device |
| CN113736969A (en) * | 2021-09-28 | 2021-12-03 | 安徽理工大学 | Dual-purpose ultrasonic shot peening strengthening device for round rod and flat-plate-shaped test piece |
-
2022
- 2022-06-10 CN CN202210659136.8A patent/CN115011770A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004045115A (en) * | 2002-07-10 | 2004-02-12 | Ishikawajima Harima Heavy Ind Co Ltd | Peening intensity measuring method |
| US20060021410A1 (en) * | 2004-07-30 | 2006-02-02 | Sonats-Societe Des Nouvelles Applications Des Techniques De Surfaces | Shot, devices, and installations for ultrasonic peening, and parts treated thereby |
| CN111551460A (en) * | 2020-05-09 | 2020-08-18 | 中国航发北京航空材料研究院 | Test piece for testing accessibility of turbine disc mortise and evaluation method |
| CN112680579A (en) * | 2020-12-10 | 2021-04-20 | 西北工业大学 | Ultrasonic shot peening strengthening device for round bar-shaped test piece |
| CN113186378A (en) * | 2021-04-29 | 2021-07-30 | 湖南科技大学 | Shot type gear ultrasonic shot blasting strengthening device |
| CN113736969A (en) * | 2021-09-28 | 2021-12-03 | 安徽理工大学 | Dual-purpose ultrasonic shot peening strengthening device for round rod and flat-plate-shaped test piece |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115679057A (en) * | 2022-11-16 | 2023-02-03 | 中国航发动力股份有限公司 | Fatigue test bar ultrasonic shot blasting device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115011770A (en) | Shot type ultrasonic impact strengthening device of round test bar and using method thereof | |
| CN107336142B (en) | A kind of device and method of electromagnetism assisting ultrasonic shot-peening | |
| CN106555046B (en) | A kind of method for eliminating welding residual stress | |
| CN1176228C (en) | Treatment method and special treating equipment for forming nanometer structure | |
| ES2379577T3 (en) | Ultrasonic blasting procedure of turbomachinery parts | |
| RU2685448C1 (en) | Device and method for continuous shot blasting of twisted spring | |
| CN107630128B (en) | A kind of the ladder array formula ultrasonic shot peening intensifying device and method of fan blade | |
| CN110724804A (en) | Ultrasonic-assisted vibration shot blasting strengthening process method for tooth root and tooth surface | |
| US10549392B2 (en) | Hammering device for influencing workpieces | |
| Gao et al. | Fatigue assessment of EA4T railway axles under artificial surface damage | |
| CN101722228A (en) | Device for processing surface of metal workpiece and method thereof | |
| CN210916181U (en) | Ultrasonic-assisted vibration shot peening strengthening process device for tooth root and tooth surface | |
| Chen et al. | Simulation and experimental validation of residual stress and surface roughness of high manganese steel after shot peening | |
| CN1169974C (en) | Nanometer structure forming method and special equipment therefor | |
| Zhang et al. | Numerical and experimental studies on needle impact characteristics in ultrasonic shot peening | |
| CN104236384B (en) | A kind of test method simulating the overload of launching shock in thorax | |
| CN1336321A (en) | Mechanical method and special mechanical equipment for forming nanometer structure | |
| Wied et al. | Impact experiments and finite element simulation of surface roughness reduction by machine hammer peening | |
| CN115575222A (en) | Hopkinson pressure bar test device for controllable continuous multi-pulse loading | |
| CN109517955A (en) | It is a kind of for improving the method and apparatus of engine nozzle jet stream orifice thermal stability | |
| KR20120064222A (en) | Ultrasonic nano-modifying apparatus and method for track pin of infinite track device | |
| CN114875344A (en) | Vacuum shot blasting device and method | |
| Nitschke-Pagel et al. | Residual stresses and near-surface material condition of welded high strength steels after different mechanical post-weld treatments | |
| Śledź et al. | Analysis of the effect of shot peening on mechanical properties of steel sheets used as screener sieve materials | |
| CN220197362U (en) | Pipe shot blasting machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |