CN115652048A

CN115652048A - Full-automatic lifting multipurpose ultrasonic shot peening strengthening device

Info

Publication number: CN115652048A
Application number: CN202211209296.9A
Authority: CN
Inventors: 黄海泉; 王成; 陶欣荣; 周彬; 钟瑶
Original assignee: Anhui University of Science and Technology
Current assignee: Anhui University of Science and Technology
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-01-31

Abstract

The invention relates to a full-automatic lifting multipurpose ultrasonic shot peening strengthening device which comprises a workbench, a sliding mechanism, a clamping mechanism, a full-automatic lifting mechanism, a supporting steel frame, a shot peening cavity, an ultrasonic generator and an ultrasonic vibration device. The workbench, the support steel frame and the full-automatic lifting device are fixedly connected through threads; the stepping motor is installed to first fixture, and the round bar shape test piece of available chuck clamp, the motor drives the chuck through the belt drive and rotates, is equipped with the shot in the peening intracavity, and accessible controller adjustment motor speed makes round bar shape test piece surface strengthening effect more even. When a flat-plate-shaped test piece is processed, the double-layer sleeve inner cylinder can be rotated to shield the through hole of the outer sleeve, the flat-plate-shaped test piece is covered by the fixing plate, the nut is locked, and then shot peening strengthening treatment is carried out on the surface of the flat-plate-shaped test piece.

Description

Full-automatic lifting multipurpose ultrasonic shot peening strengthening device

Technical Field

The invention relates to the technical field of metal surface strengthening treatment, in particular to a full-automatic lifting multipurpose ultrasonic shot peening strengthening device.

Background

Ultrasonic shot blasting is a novel material surface treatment technology, the surface performance of a workpiece is improved by driving a metal medium to impact the surface of the workpiece through ultrasonic vibration, and the principle is that a residual compressive stress layer is introduced through the fact that the shot impacts the surface of the workpiece to generate elastic-plastic deformation, so that crack expansion is inhibited, and fatigue failure is delayed. Most metal materials can be improved in hardness, wear resistance, fatigue strength and the like by using an ultrasonic shot blasting technology. Factors influencing the ultrasonic shot blasting effect are very complex, and the strengthening effect is difficult to control accurately, so a large number of experiments are needed to research out a theoretical model capable of directly serving the process parameters so as to popularize the application field of ultrasonic shot blasting.

The existing ultrasonic shot blasting devices in laboratories are mostly used for processing flat-plate-shaped test pieces, the ultrasonic shot blasting devices for processing cylindrical surfaces of round bar-shaped test pieces are rare, most of the ultrasonic shot blasting devices cannot or are difficult to conveniently regulate and control the relative height between the test pieces and shot blasting, and the relative height between the test pieces and the shot blasting has great influence on the ultrasonic shot blasting effect, so that a full-automatic lifting multipurpose ultrasonic shot blasting strengthening device is necessary to be designed to solve the problems.

Disclosure of Invention

The invention aims to provide a full-automatic lifting multipurpose ultrasonic shot peening strengthening device which can carry out ultrasonic shot peening treatment on a round bar-shaped test piece and a flat-plate-shaped test piece, automatically regulate and control the relative height of the test piece and shot peening, and has convenient and efficient processing process.

In order to achieve the above object, the present invention is achieved by the following technical means.

The utility model provides a full-automatic lift multipurpose supersound peening strengthening device, is including workstation, peening chamber, first fixture, second fixture, first slide mechanism, second slide mechanism, full-automatic elevating gear, support steelframe, supersonic generator and ultrasonic vibration device.

The shot blasting chamber comprises a double-layer sleeve, the outer cylinder is provided with a pair of large through holes, and the inner cylinder is provided with a plurality of pairs of through holes with different diameters.

According to the full-automatic lifting device, the two servo motors are connected with the motor bracket through the screw threads between the servo motor bases and the motor bracket, and the motor bracket is welded with the connecting rod, so that synchronous lifting of the servo motors and the screw rod is achieved. Two servo motors are controlled by one servo motor controller with two servo motors, and the two servo motors synchronously drive the screw rods connected with each other, so that the automatic lifting of the device is realized.

The ultrasonic vibration device comprises an energy converter, an amplitude transformer and a vibration head, wherein the ultrasonic generator generates ultrasonic signals, the ultrasonic generator is connected with the energy converter through a cable, the energy converter converts electrical signals into mechanical displacement, the energy converter is connected with the amplitude transformer, the amplitude transformer amplifies the mechanical displacement generated by the energy converter, the amplitude transformer is connected with the vibration head, and the vibration head drives shots to randomly move in a shot blasting cavity.

The positioning through hole in the ultrasonic vibration device and the small through hole in the center of the support steel frame are high in coaxiality and need to meet the use requirement.

Drawings

The fully automatic lifting multipurpose ultrasonic shot peening device of the invention is further described in detail with reference to the accompanying drawings and the embodiment.

FIG. 1 is a schematic view of a fully automatic lifting multi-purpose ultrasonic shot peening apparatus of the present invention.

FIG. 2 is a schematic view of the structure of the shot blasting chamber.

FIG. 3 is a schematic view of a first clamping mechanism.

Fig. 4 is a schematic view of the first and second sliding mechanisms.

Fig. 5 is a schematic view of the fully automatic lifting device.

FIG. 6 is a schematic view of the support frame structure.

Fig. 7 is a schematic view of an ultrasonic vibration device.

FIG. 8 is a schematic view of a second clamping mechanism.

In the figure: 1. the pneumatic shot blasting machine comprises a shot blasting cavity 2, a first clamping device 3, a first sliding mechanism 4, a workbench 5, a full-automatic lifting device 6, a support steel frame 7, an ultrasonic generator 8, an ultrasonic vibration device 9, a second sliding device 10, a second clamping device 11, an inner layer sleeve 12, an outer layer sleeve 13, a circular cone sheet 14, a lower layer shot blasting cavity 15, a vibration head end face 16, a fixing plate 17, a long bolt 21, a stepping motor 22, a four-jaw chuck 23, a spindle seat 24, a large wheel 25, a belt 26 and a small wheel 27. Stepping motor seat 31, first polished rod 32, first sliding base 33, first aluminum support 34, first sliding block 51, servo motor 52, motor bracket 53, connecting rod 54, lead screw 55, servo motor seat 61, large through hole 62, small through hole 63, rubber foot pad 81, vibrating head 82, positioning through hole 83, amplitude transformer 84, transducer 85, cable joint 91, second polished rod 92, second sliding base 93, second sliding block 94, second aluminum support 101, knob 102, bearing block 103, tip

Detailed Description

The present invention will be described below with reference to specific embodiments.

The embodiment is a full-automatic lifting multipurpose ultrasonic shot peening device.

Referring to fig. 1 to 8, the full-automatic lifting multipurpose ultrasonic shot peening device of the embodiment comprises a workbench 4, a full-automatic lifting device 5, a supporting steel frame 6, a first sliding mechanism 3, a second sliding mechanism 9, a shot peening cavity 1, an ultrasonic vibration device 8 and an ultrasonic generator 7; wherein, it is fixed through threaded connection between workstation 4 and the full-automatic elevating gear 5, it is fixed through threaded connection between full-automatic elevating gear 5 and the support steelframe 6.

The first clamping mechanism is provided with a stepping motor 21, the stepping motor 21 is fixedly connected with a stepping motor base 27 through threads, the stepping motor base 27 is fixedly connected with a first sliding base 32 through threads, the stepping motor 21 is connected with a stepping motor controller through a cable, the rotating speed of the stepping motor is regulated through the controller, the stepping motor drives the four-jaw chuck 22 to rotate through belt transmission, an outer sleeve at the position corresponding to the center 22 of the chuck is provided with a through hole, and the inner sleeve is provided with a plurality of pairs of through holes with different diameters; the round bar-shaped test piece in the shot-peening chamber 1 is connected to the chuck 22 through the through-hole.

In this embodiment, the worktable 5 is made of 10mm aluminum alloy plate, the full-automatic lifting device 6 is mostly made of cast steel, and the supporting steel frame is made of 30 × 2 stainless steel square tubes by welding. The workbench 5 is used for bearing the first sliding mechanism 4 and the second sliding mechanism 13, and the support steel frame is mainly used for bearing the ultrasonic vibration device 8.

The circular conical sheet 13 is placed at the port of the lower shot blasting cavity 14 and is tightly matched with the inner wall of the inner sleeve 11, and the width of the circular conical sheet 13 is consistent with that of the port of the lower shot blasting cavity 14. The circular cone sheet 13 has a negative angle with the horizontal direction, and is used for collecting the shot on the end face 15 of the vibration head in the ultrasonic shot blasting process. After assembly, the clearance between the vibrating head 81 and the inner wall of the lower shot blasting cavity 14 is ensured to be smaller than the diameter of the shot.

Through servo motor 51, can realize the automatic rising of workstation 4, make the distance between test piece and the vibration head terminal surface 15 change to realize the supersound peening effect under the different distances.

The ultrasonic vibration device 8 comprises a vibration head 81, a horn 83, a transducer 84 and a cable joint 85; the ultrasonic vibration device 8 is matched with a small through hole in a corresponding matching position on the support steel frame 7 through the positioning through hole 82, so that the ultrasonic vibration device 8 is fixed on the support steel frame 7 through bolt connection, the ultrasonic generator 7 generates an ultrasonic signal, the ultrasonic generator 7 is connected with the transducer 84 through a cable, the transducer 84 converts the electric signal into mechanical displacement, the transducer 84 is connected with the amplitude transformer 83, the amplitude transformer 83 amplifies the mechanical displacement generated by the transducer 84, the amplitude transformer 83 is connected with the vibration head 81, and the vibration head 81 drives the shot to move in the shot blasting cavity 1.

The present invention will be described in detail with reference to specific working procedures as follows:

step one (clamping test piece): when a round bar-shaped test piece is processed, the fixing plate 16 at the upper end of the double-layer sleeve is already in a shrinking and fixing state, firstly, a required number of shots are put into the shot blasting cavity 1, one end of the round bar-shaped test piece is clamped by the four-jaw chuck 22 of the first clamping mechanism 2, and after the clamping is finished, the round bar-shaped test piece can be driven to enter the shot blasting cavity 1 through the through holes in the outer-layer sleeve 12 and the inner-layer sleeve 11 by moving the 1 st sliding base 32; when the round bar-shaped test piece is positioned at the center of the shot blasting chamber 1, the first sliding base 32 stops moving, and the first sliding block 34 is locked by the handle to be fixed. The second sliding base is moved to enable the second clamping mechanism 9 and the round bar-shaped test piece to complete clamping, after the test piece is clamped, the stepping motor is started, the stepping motor 21 drives the four-jaw chuck 22 to rotate through a belt, the four-jaw chuck 22 drives the round bar-shaped test piece to rotate at a constant speed, and the stepping motor is controlled by the stepping motor controller to reach the rotating speed required by the test. When a flat test piece is clamped, the double-layer sleeve inner cylinder can be rotated to shield the outer-layer sleeve through hole, the flat test piece is placed on the shot blasting cavity 1 and covered by the fixing plate 16, the nut is locked, and then the flat test piece can be fixed to the top end of the shot blasting cavity 1.

Step two (setting test parameters and starting the ultrasonic shot blasting generator): the time, the ultrasonic frequency, the amplitude and other parameters are set through the ultrasonic generator 7, the ultrasonic generator 7 is started after the setting is finished, ultrasonic signals are input into the transducer 84 through cables, the transducer 84 converts the received ultrasonic signals into mechanical displacement, the mechanical displacement is amplified through the amplitude transformer 83 and then transmitted to the vibrating head 81, the vibrating head 81 transmits the vibration energy to shots on the surface, and then ultrasonic shot blasting is carried out on the round rod-shaped test piece or the flat plate-shaped test piece in the shot blasting cavity 1.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A full-automatic lifting multipurpose ultrasonic shot peening strengthening device comprises a workbench, a first sliding mechanism, a second sliding mechanism, a first clamping mechanism, a second clamping mechanism, a full-automatic lifting device, a shot peening cavity, an ultrasonic vibration device, an ultrasonic generator and a support steel frame, and is characterized in that the workbench, the support steel frame and the full-automatic lifting device are fixedly connected through threads; the stepping motor in the first clamping mechanism is connected with the motor controller through a cable, the rotating speed of the stepping motor is adjusted through the controller, the stepping motor drives the four-jaw chuck to rotate through belt transmission, and a double-layer sleeve at a position corresponding to the center of the chuck is provided with a circular through hole; the support steel frame plays a role of bearing the ultrasonic vibration device.

2. The full-automatic lifting multipurpose ultrasonic shot peening device according to claim 1, characterized in that: the shot blasting cavity comprises a double-layer sleeve, the outer layer sleeve is provided with a pair of large through holes, the inner layer sleeve is provided with a plurality of pairs of through holes with different diameters, the inner diameter of the inner layer sleeve is slightly larger than the outer wall of the shot blasting cavity on the lower layer, and a gap between the inner layer sleeve and the outer layer sleeve is smaller than the diameter of a shot.

3. The full-automatic lifting multipurpose ultrasonic shot peening device according to claim 1, characterized in that: the coaxiality of the positioning through hole on the ultrasonic vibration device and the small through hole at the central position of the supporting steel frame is higher, and the use requirement is required to be met.

4. The full-automatic lifting multipurpose ultrasonic shot peening device according to claim 1, characterized in that: the full-automatic lifting device controls two servo motors by dragging two servo motor controllers, realizes that the two servo motors synchronously drive the screw rods connected with each other, and further realizes the automatic lifting of the device.