CN116694915B - Pulse magnetic field strengthening treatment method and device - Google Patents
Pulse magnetic field strengthening treatment method and device Download PDFInfo
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- CN116694915B CN116694915B CN202310670201.1A CN202310670201A CN116694915B CN 116694915 B CN116694915 B CN 116694915B CN 202310670201 A CN202310670201 A CN 202310670201A CN 116694915 B CN116694915 B CN 116694915B
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- 238000005728 strengthening Methods 0.000 title claims abstract description 66
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- 239000003990 capacitor Substances 0.000 claims description 15
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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
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
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Abstract
The invention relates to a pulse magnetic field strengthening treatment method and a device, wherein the device comprises a discharge control system, a punch assembly, an auxiliary positioning device and a driving mechanism; the punch assembly comprises a coil and a base, the coil is connected with the base through a guide rod, and the base is connected with a charge-discharge control system and is used for generating a pulse magnetic field; the coil on the guide rod generates instantaneous lorentz force to impact the main journal transition fillet under the action of the pulse magnetic field; the clamping assembly clamps the crankshaft, the driving mechanism actively rotates for a certain angle after the coil completes one-time impact strengthening, and the next strengthening preparation is completed.
Description
Technical Field
The invention relates to the technical field of metal surface strengthening equipment, in particular to a pulse magnetic field strengthening treatment method and device.
Background
In the production process of the crankshaft, the transition fillet part of the journal is easy to damage the original structure due to the high-temperature phase change-rapid cooling process, the internal stress is large due to uneven cooling, the harmful phase is easy to generate due to improper temperature control, the deformation control difficulty is large, and the like, so that the fatigue resistance performance is reduced; in order to improve the fatigue strength of the crankshaft, at present, a surface treatment method is mostly adopted to strengthen the fillet transition part of the crankshaft journal, so that the surface layer material generates residual compressive stress to offset part of the tensile stress in the working process, thereby achieving the purpose of improving the fatigue resistance of the crankshaft; at present, the surface strengthening technology for the crank fillet can realize the introduction of a residual compressive stress layer, and can be divided into phase change/modification strengthening and strain strengthening according to a strengthening mechanism.
The phase change/modification strengthening is characterized in that phase structure or hard particles with higher strength/hardness are generated by introducing material phase change or strengthening elements, and induction quenching, carburizing, nitriding, carbonitriding and the like are mainly used for strengthening the transition part of the crankshaft fillet, but the strengthening process needs to undergo a high-temperature phase change-rapid cooling process, and the problems that the original structure (such as forging streamline structure) is easily damaged, internal stress is large due to uneven cooling, harmful phase is easily generated due to improper temperature control, deformation control difficulty is large and the like exist, and although surface quenching (such as induction, laser, electron beam quenching and the like) is helpful for improving the deformation, the problems of local stress concentration, low process control precision and the like are extremely easily caused by a high-temperature-rapid cooling mode.
The strain strengthening is to realize the yield strength improvement through certain plastic deformation at room temperature, and introduce proper compressive stress, mainly comprises shot peening strengthening and rolling strengthening, and the high-temperature phase change-rapid cooling process leads to the problems that the original tissue is easy to be damaged, the internal stress is large easily caused by uneven cooling, the harmful phase is easy to be generated due to improper temperature control, the deformation control difficulty is high, the efficiency is low, the roughness is increased, and the crankshaft deformation is caused by excessive pressure of the rolling strengthening technology.
Disclosure of Invention
Aiming at the defects in the prior art, the pulse magnetic field strengthening treatment method and the pulse magnetic field strengthening treatment device provided by the invention continuously charge and discharge the coil through the charge and discharge control system, directly impact and strengthen the excessive fillet of the crankshaft by utilizing the pulse magnetic field, do not change the original tissue, do not have a high-temperature process, do not change the original roughness, and do not generate pressure to cause the deformation of the crankshaft.
The invention provides a pulsed magnetic field strengthening treatment method, which comprises the following steps:
S1, configuring a strengthening device, wherein a driving mechanism is arranged at one end of a crankshaft, the driving mechanism is used for driving the crankshaft to rotate, the rotation center is a central shaft of a journal to be strengthened, a coil is arranged at the position of the journal to be strengthened, and the coil is electrically connected with a discharge control system;
S2, determining the rotation angle theta 2 of the journal to be reinforced each time, and enabling the rotation times N=0 of the crankshaft;
s3, discharging the coil by the discharge control system, and strengthening the journal by the coil;
s4, driving the shaft neck to be reinforced by a driving mechanism to rotate by an angle theta 2, so that N=N+1;
s5, returning to S3 to continue execution when N is less than 360/theta 2, otherwise, ending the reinforcement of the crankshaft journal.
Preferably, the method for determining the rotation angle θ 2 of the journal to be reinforced in the step S2 includes the following steps:
s21, obtaining a coil current i according to a power balance equation and a voltage balance equation in a discharge strengthening process;
S22, calculating equivalent pulse magnetic pressure P when the coil is placed close to the reinforced surface according to the coil current i;
s23, calculating radial deformation depth omega 0 (t) and deformation angle theta 1 of the crankshaft by using a pure radial motion equation of the unit and a flow stress equation of the surface of the crankshaft;
S24, after discharge strengthening is performed once, the rotation angle theta 2 of the journal to be strengthened is as follows:
where r is the crankshaft journal radius, ω 0 (t) is the crankshaft radial deformation depth, θ 1 is the deformation angle.
Preferably, the method for calculating the coil current i in step S21 includes the steps of:
S211, a power balance equation in the discharge strengthening process is as follows:
The voltage balance equation is:
In equations ② and ③, Q is the charge stored by the capacitor, For the mechanical power changing the geometric dimension of the loop, t is time, C is the capacitance of the energy storage capacitor, L is the equivalent inductance value of the coil, R is the equivalent resistance, and i is the coil current;
s212, obtaining coil current i according to a power balance equation and a voltage balance equation in the discharge strengthening process:
In the method, in the process of the invention, T is time, C is energy storage capacitor capacitance, L is coil equivalent inductance value, and R is equivalent resistance.
Preferably, the method for calculating the equivalent pulse magnetic pressure P in step S22 includes the steps of:
s221, placing the coil close to the strengthening surface, and expressing the equivalent pulse magnetic pressure P as:
Wherein mu 0 is vacuum magnetic permeability, lambda is long-period coefficient, T is number of turns in unit length of the coil, and i is coil current;
S222, order The obtained equivalent pulse magnetic pressure P is:
In the method, in the process of the invention, T is time, C is energy storage capacitor capacitance, L is coil equivalent inductance value, and R is equivalent resistance.
Preferably, the method for calculating the radial deformation depth ω 0 (t) of the crankshaft in step S23 includes the steps of:
S231, ignoring bending moment, wherein the pure radial motion equation of the unit is as follows:
Where N θ is the circumferential force, Sigma θ is surface stress, gamma is crank shaft material density, r is crank shaft journal radius, h is strengthening middle deformation thickness;
s232, taking the flow stress P y of the surface of the crankshaft:
Wherein σ is an average value of σ 0, σ 0 is an equivalent stress, k=0.5 exp < -l (2D) ], D is a crank journal diameter, and l is a strengthened surface length;
S233, obtaining according to a unit pure radial motion equation and a crankshaft surface flow stress P y:
Integrating ⑨ above, from the initial condition And (3) simplifying calculation to obtain:
Wherein t 1 is discharge start time, and t 3 is discharge stop time;
When t=t 1, From the above ⑩:
S234, simplifying calculation according to ⑧⑨⑩, wherein the radial deformation depth omega 0 (t) of the crankshaft is as follows:
In the above-mentioned method, the step of, Mu 0 is vacuum permeability, lambda is the coefficient of Length, T is the number of turns per unit length of the coil, gamma is the density of the crankshaft material, h is the thickness of deformation in strengthening, U is the coil voltage, C is the capacitance of the storage capacitor, R is the equivalent resistance,/>T is time.
Preferably, in step S23, the deformation angle θ 1 is:
Where ω 0 (t) is the radial deformation depth of the crankshaft and x is the surface deformation radius.
A pulsed magnetic field enhancement treatment device, the device comprising:
The punch assembly comprises a base, one side of the base is provided with a guide rod, a first end of the guide rod is fixedly connected with the base, a second end of the guide rod is provided with a coil, the coil is sleeved and fixed at the second end of the guide rod, and the coil faces towards a journal to be reinforced of the crankshaft;
and the discharge control system is electrically connected with the coil and is used for electrifying the coil.
Preferably, the base is provided with an auxiliary positioning device, the auxiliary positioning device comprises a positioning plate, a positioning groove is formed in the positioning plate, and the guide rod is arranged in the positioning groove.
Preferably, the device further comprises a driving mechanism, wherein the driving mechanism is used for driving the journal to be reinforced of the crankshaft to rotate around the central shaft of the journal to be reinforced, the driving mechanism comprises a driving motor, an output shaft of the driving motor and the journal of the connecting rod to be reinforced of the crankshaft are coaxially arranged, and a clamping assembly is arranged at the output end of the driving motor and used for clamping the crankshaft.
Preferably, the clamping assembly comprises a supporting plate, the supporting plate is fixedly connected with an output shaft of the driving motor, and a claw for clamping the crankshaft is arranged on the supporting plate.
Compared with the prior art, the pulse magnetic field strengthening treatment method and device provided by the invention have the beneficial effects that:
1. According to the invention, through the design of the magnetic field, under the condition that the charge and discharge control system continuously charges and discharges to the coil, the transition fillet of the crankshaft can be continuously impacted, the efficiency is higher, the effect is stable, the R angle reinforcement of the crankshaft can be rapidly realized, the treatment efficiency is very high, and the process is reliable; the transition fillet of the crank shaft is directly impacted and reinforced by using the pulse magnetic field, the metal surface layer material is not changed, the structure is kept unchanged, the surface roughness is not reduced, the whole bending deformation of the crank shaft is not caused by overlarge pressure during reinforcement, the reinforcement process is easy to control, the crank shaft material hardly generates the structure transformation due to no high-temperature process, and the excellent structure formed by the original heat treatment or forging can be kept.
2. The invention has low energy consumption, the process is basically carried out at room temperature, high-temperature heating and protective atmosphere are not needed, and almost no material loss exists; and little energy is required to establish a pulsed magnetic field.
3. The invention can uniformly strengthen and control the stress: the reinforced layer depth control can be realized through the adjustment of the characteristics (frequency, intensity, frequency, direction and the like) of the pulse magnetic field; and the low-frequency characteristic can effectively reduce microscopic stress.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a coil of the present invention;
FIG. 3 is a schematic view of a three jaw caliper of the present invention;
FIG. 4 is a schematic view of a use state of the present invention;
FIG. 5 is a schematic diagram I of the strengthening position of the crankshaft after one rotation angle;
FIG. 6 is a schematic diagram II of the strengthening position of the crankshaft after one rotation angle;
FIG. 7 is a schematic view III of the strengthening position of the crankshaft after one rotation angle of the present invention;
FIG. 8 is a flow chart of the processing method of the present invention.
Reference numerals illustrate:
1. A discharge control system; 2. a punch assembly; 3. an auxiliary positioning device; 4. a clamping assembly; 5. a coil; 6. a guide rod; 7. and (5) a base.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to fig. 1 to 8, but it should be understood that the scope of the present invention is not limited by the specific embodiments.
The invention provides a pulsed magnetic field strengthening treatment method, which comprises the following steps:
S1, configuring a strengthening device, wherein a driving mechanism is arranged at one end of a crankshaft, the driving mechanism is used for driving the crankshaft to rotate, the rotation center is a central shaft of a journal to be strengthened, a coil 5 is arranged at the position of the journal to be strengthened, and the coil 5 is electrically connected with a discharge control system;
S2, determining the rotation angle theta 2 of the journal to be reinforced each time, and enabling the rotation times N=0 of the crankshaft;
S3, discharging the coil 5 by a discharge control system, and strengthening the journal by the coil 5;
s4, driving the shaft neck to be reinforced by a driving mechanism to rotate by an angle theta 2, so that N=N+1;
s5, returning to S3 to continue execution when N is less than 360/theta 2, otherwise, ending the reinforcement of the crankshaft journal.
Further, the method for determining the rotation angle theta 2 of the journal to be reinforced in the step S2 includes the steps of:
s21, obtaining a coil current i according to a power balance equation and a voltage balance equation in a discharge strengthening process;
s22, calculating equivalent pulse magnetic pressure P when the coil 5 is placed close to the reinforced surface according to the coil current i;
s23, calculating radial deformation depth omega 0 (t) and deformation angle theta 1 of the crankshaft by using a pure radial motion equation of the unit and a flow stress equation of the surface of the crankshaft;
S24, after discharge strengthening is performed once, the rotation angle theta 2 of the journal to be strengthened is as follows:
where r is the crankshaft journal radius, ω 0 (t) is the crankshaft radial deformation depth, θ 1 is the deformation angle.
Further, the method for calculating the coil current i in step S21 includes the steps of:
S211, a power balance equation in the discharge strengthening process is as follows:
The voltage balance equation is:
In equations ② and ③, Q is the charge stored by the capacitor, For the mechanical power changing the geometric dimension of the loop, t is time, C is the capacitance of the energy storage capacitor, L is the equivalent inductance value of the coil, R is the equivalent resistance, and i is the coil current;
S212, the first wave of the magnetic pressure pulse plays a main role in deformation, the equivalent inductance change of a discharge loop is small, and the calculation accuracy cannot be greatly influenced by neglecting the equivalent inductance change, so that the inductance change is not considered, and the coil current i is obtained according to a power balance equation and a voltage balance equation in the discharge strengthening process:
In the method, in the process of the invention, T is time, C is energy storage capacitor capacitance, L is coil equivalent inductance value, and R is equivalent resistance.
Further, the method for calculating the equivalent pulse magnetic pressure P in step S22 includes the steps of:
s221, placing the coil close to the strengthening surface, and expressing the equivalent pulse magnetic pressure P as:
Wherein mu 0 is vacuum magnetic permeability, lambda is a long-period coefficient (table lookup), T is the number of turns in unit length of the coil, and i is the coil current;
S222, order The obtained equivalent pulse magnetic pressure P is:
In the method, in the process of the invention, T is time, C is energy storage capacitor capacitance, L is coil equivalent inductance value, and R is equivalent resistance.
Further, the method for calculating the radial deformation depth ω 0 (t) of the crankshaft in step S23 includes the steps of:
S231, ignoring bending moment, wherein the pure radial motion equation of the unit is as follows:
Where N θ is the circumferential force, Sigma θ is surface stress, gamma is crank shaft material density, r is crank shaft journal radius, h is strengthening middle deformation thickness;
s232, taking the flow stress P y of the surface of the crankshaft:
Wherein σ is an average value of σ 0, σ 0 is an equivalent stress, k=0.5 exp < -l (2D) ], D is a crank journal diameter, and l is a strengthened surface length;
S233, obtaining according to a unit pure radial motion equation and a crankshaft surface flow stress P y:
Integrating ⑨ above, from the initial condition And (3) simplifying calculation to obtain:
Wherein t 1 is discharge start time, and t 3 is discharge stop time;
When t=t 1, From the above ⑩:
S234, simplifying calculation according to ⑧⑨⑩, wherein the radial deformation depth omega 0 (t) of the crankshaft is as follows:
In the above-mentioned method, the step of, Mu 0 is vacuum permeability, lambda is the coefficient of Length (look-up table), T is the number of turns per unit length of the coil, gamma is the density of the crankshaft material, h is the thickness of deformation in strengthening, U is the coil voltage, C is the capacitance of the energy storage capacitor, R is the equivalent resistance,/>T is time.
As shown in fig. 1 to 4, the present invention provides a pulsed magnetic field enhancement processing apparatus, which includes:
The punch assembly 2 comprises a base 7, a guide rod 6 is arranged on one side of the base 7, a first end of the guide rod 6 is fixedly connected with the base 7, a coil 5 is arranged at a second end of the guide rod 6, the coil 5 is sleeved and fixed at the second end of the guide rod 6, and the coil 5 faces towards a journal to be reinforced of the crankshaft;
the discharge control system 1 is electrically connected with the coil 5 and is used for energizing the coil 5.
The coil 5 is used for generating a pulse magnetic field; the coil 5 on the guide rod 6 generates instantaneous lorentz force to impact the main journal transition fillet under the action of the pulse magnetic field.
Further, an auxiliary positioning device 3 is arranged on the base 7, the auxiliary positioning device 3 comprises a positioning plate, a positioning groove is formed in the positioning plate, and the guide rod 6 is arranged in the positioning groove.
The auxiliary positioning device 3 ensures that the coil 5 is positioned at the same position when strengthening is started each time, thus ensuring that the strengthening of the whole journal R angle can be completed after the pulse strengthening for a plurality of fixed times is completed along with the rotation of the crankshaft
Further, the device also comprises a driving mechanism, wherein the driving mechanism is used for driving the journal to be reinforced of the crankshaft to rotate around the central shaft of the journal to be reinforced, the driving mechanism comprises a driving motor, an output shaft 8 of the driving motor is coaxially arranged with the journal of the connecting rod to be reinforced of the crankshaft, a clamping assembly 4 is arranged at the output end of the driving motor, and the clamping assembly 4 is used for clamping the crankshaft. The driving mechanism can actively rotate a certain angle after completing one time of impact reinforcement on the coil, and the next time of reinforcement preparation is completed,
Further, the clamping assembly 4 comprises a supporting plate, the supporting plate is fixedly connected with an output shaft 8 of the driving motor, a claw for clamping a crankshaft is arranged on the supporting plate, and the claw can select a three-claw caliper.
The output shaft 8 of the driving motor is always coaxial with the crankshaft to be reinforced, and the position of the clamping assembly 4 on the supporting plate is determined according to the position of the clamping end of the crankshaft to be reinforced, so that the crankshaft to be reinforced can be ensured to rotate around the axis of the crankshaft to be reinforced.
Principle of operation
According to the pulse magnetic field strengthening treatment device provided by the invention, in the working process, the charge-discharge control system charges the coil, so that the coil is electrified to generate a pulse magnetic field, and the crank shaft generates induced current and forms instant magnetic field force under the interaction of the magnetic field and the instant strong magnetic field of the coil to impact the transition fillet of the crank shaft to be processed. The coil can continuously impact the crankshaft in the working state so as to introduce a residual stress layer into the transition fillet of the crankshaft, thereby achieving the purpose of strengthening. After the coil completes impact reinforcement on a certain position of the crankshaft transition fillet, the driving mechanism enables the crankshaft to rotate for a certain angle, and the charge and discharge control system charges the coil again, so that the next reinforcement position corresponds to the coil, and the next impact reinforcement process starts to be started until the reinforcement of the crankshaft transition fillet to be processed is completed.
When the driving mechanism drives the crankshaft to rotate, if the angle of each rotation of the crankshaft is too large, as shown in fig. 5, impact reinforcement at the fillet of the crankshaft is uneven, so that residual stress is large or small, stress relaxation and uneven surface reinforcement can cause poor matching with the connecting rod, vibration of the crankshaft connecting rod mechanism is increased, and the service life of the crankshaft is shortened.
If the rotation angle of the crankshaft is too small, as shown in fig. 6, the depth of the width of the plastic deformation region of the metal surface is continuously increased and the surface roughness is continuously deteriorated with the increase of the number of impacts; the small rotation angle can cause the increase of the impact times, reduce the service life of the impact rod coil and increase the strengthening economic cost.
According to the invention, the rotation angle is more accurate through calculation, as shown in fig. 7, the uniformity of strengthening the fillet of the crankshaft is improved, the strengthening quality is ensured, the strengthening times are reduced, the service life of the coil is prolonged, and the cost is reduced under the condition of ensuring the strengthening quality.
The foregoing disclosure is merely illustrative of preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any variations within the scope of the present invention will be apparent to those skilled in the art.
Claims (5)
1. A pulsed magnetic field enhancement method, comprising the steps of:
s1, configuring a strengthening device, wherein a driving mechanism is arranged at one end of a crankshaft, the driving mechanism is used for driving the crankshaft to rotate, the rotation center is a central shaft of a journal to be strengthened, a coil (5) is arranged at the position of the journal to be strengthened, and the coil (5) is electrically connected with a discharge control system;
S2, determining the rotation angle theta 2 of the journal to be reinforced each time, and enabling the rotation times N=0 of the crankshaft;
S3, discharging the coil (5) by a discharge control system, and strengthening the journal by the coil (5);
s4, driving the shaft neck to be reinforced by a driving mechanism to rotate by an angle theta 2, so that N=N+1;
S5, returning to S3 to continue execution when N is less than 360/theta 2, otherwise, ending the reinforcement of the crankshaft journal;
The method for determining the rotation angle theta 2 of the journal to be reinforced in the step S2 comprises the following steps:
s21, obtaining a coil current i according to a power balance equation and a voltage balance equation in a discharge strengthening process;
S22, calculating equivalent pulse magnetic pressure P when the coil (5) is placed close to the reinforced surface according to the coil current i;
s23, calculating radial deformation depth omega 0 (t) and deformation angle theta 1 of the crankshaft by using a pure radial motion equation of the unit and a flow stress equation of the surface of the crankshaft;
S24, after discharge strengthening is performed once, the rotation angle theta 2 of the journal to be strengthened is as follows:
Wherein r is the radius of a crankshaft journal, omega 0 (t) is the radial deformation depth of the crankshaft, and theta 1 is the deformation angle;
The method for calculating the coil current i in step S21 includes the steps of:
S211, a power balance equation in the discharge strengthening process is as follows:
The voltage balance equation is:
In equations ② and ③, Q is the charge stored by the capacitor, For the mechanical power changing the geometric dimension of the loop, t is time, C is the capacitance of the energy storage capacitor, L is the equivalent inductance value of the coil, R is the equivalent resistance, and i is the coil current;
s212, obtaining coil current i according to a power balance equation and a voltage balance equation in the discharge strengthening process:
In the method, in the process of the invention, T is time, C is energy storage capacitor capacitance, L is coil equivalent inductance value, R is equivalent resistance;
the method for calculating the equivalent pulse magnetic pressure P in step S22 includes the steps of:
s221, placing the coil close to the strengthening surface, and expressing the equivalent pulse magnetic pressure P as:
Wherein mu 0 is vacuum magnetic permeability, lambda is long-period coefficient, T is number of turns in unit length of the coil, and i is coil current;
S222, order The obtained equivalent pulse magnetic pressure P is:
P＝P0e-2βtsin2(ωt) ⑥
In the method, in the process of the invention, T is time, C is energy storage capacitor capacitance, L is coil equivalent inductance value, R is equivalent resistance;
The calculation method of the radial deformation depth omega 0 (t) of the crankshaft in the step S23 comprises the following steps:
S231, ignoring bending moment, wherein the pure radial motion equation of the unit is as follows:
Where N θ is the circumferential force, Sigma θ is surface stress, gamma is crank shaft material density, r is crank shaft journal radius, h is strengthening middle deformation thickness;
s232, taking the flow stress P y of the surface of the crankshaft:
In the method, in the process of the invention, Sigma 0 is the equivalent stress, k=0.5 exp < -l (2D) ], D is the crankshaft journal diameter, l is the strengthened surface length;
S233, obtaining according to a unit pure radial motion equation and a crankshaft surface flow stress P y:
Integrating ⑨ above, from the initial condition And (3) simplifying calculation to obtain:
Wherein t 1 is discharge start time, and t 3 is discharge stop time;
When t=t 1, From the above ⑩:
S234, simplifying calculation according to ⑧⑨⑩, wherein the radial deformation depth omega 0 (t) of the crankshaft is as follows:
In the above-mentioned method, the step of, Mu 0 is vacuum permeability, lambda is the coefficient of Length, T is the number of turns per unit length of the coil, gamma is the density of the crankshaft material, h is the thickness of deformation in strengthening, U is the coil voltage, C is the capacitance of the storage capacitor, R is the equivalent resistance,/>T is time;
in step S23, the deformation angle θ 1 is:
where ω 0 (t) is the radial deformation depth of the crankshaft and x is the deformation radius of the crankshaft surface.
2. A pulsed magnetic field enhancement processing apparatus that implements the pulsed magnetic field enhancement processing method of claim 1, comprising:
the punch assembly (2), the punch assembly (2) comprises a base (7), one side of the base (7) is provided with a guide rod (6), a first end of the guide rod (6) is fixedly connected with the base (7), a second end of the guide rod is provided with a coil (5), the coil (5) is sleeved and fixed at the second end of the guide rod (6), and the coil (5) faces towards a shaft neck to be reinforced of the crankshaft;
And the discharge control system (1) is electrically connected with the coil (5) and is used for controlling the on-off of the coil (5).
3. The pulsed magnetic field strengthening treatment device according to claim 2, characterized in that the base (7) is provided with an auxiliary positioning device (3), the auxiliary positioning device (3) comprises a positioning plate, a positioning groove is formed in the positioning plate, and the guide rod (6) is arranged in the positioning groove.
4. A pulsed magnetic field strengthening treatment device as claimed in claim 3, further comprising a drive mechanism for driving the journal to be strengthened of the crankshaft to rotate around the central axis of the journal to be strengthened, the drive mechanism comprising a drive motor, an output shaft (8) of the drive motor being arranged coaxially with the journal of the connecting rod to be strengthened of the crankshaft, the output end of the drive motor being provided with a clamping assembly (4), the clamping assembly (4) being for clamping the crankshaft.
5. The pulsed magnetic field intensification treatment device of claim 4, characterized in that the clamping assembly (4) comprises a support plate fixedly connected with an output shaft (8) of the drive motor, and a claw for clamping the crankshaft is provided on the support plate.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101560587A (en) * | 2009-05-22 | 2009-10-21 | 江苏大学 | Composite impact material surface strengthening method and device |
| CN103406419A (en) * | 2013-08-06 | 2013-11-27 | 西北工业大学 | Forming device and forming method of electromagnetic induction assisting prestress |
| WO2018228795A1 (en) * | 2017-06-14 | 2018-12-20 | Maschinenfabrik Alfing Kessler Gmbh | Method and device for the impact treatment of transition radii of a crankshaft |
| CN113502379A (en) * | 2021-06-23 | 2021-10-15 | 华中科技大学 | Device and method for eliminating residual stress of workpiece by using pulse electromagnetic force |
-
2023
- 2023-06-07 CN CN202310670201.1A patent/CN116694915B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101560587A (en) * | 2009-05-22 | 2009-10-21 | 江苏大学 | Composite impact material surface strengthening method and device |
| CN103406419A (en) * | 2013-08-06 | 2013-11-27 | 西北工业大学 | Forming device and forming method of electromagnetic induction assisting prestress |
| WO2018228795A1 (en) * | 2017-06-14 | 2018-12-20 | Maschinenfabrik Alfing Kessler Gmbh | Method and device for the impact treatment of transition radii of a crankshaft |
| CN113502379A (en) * | 2021-06-23 | 2021-10-15 | 华中科技大学 | Device and method for eliminating residual stress of workpiece by using pulse electromagnetic force |
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