CN116586656A - Piezoelectric ceramic bending vibration type thin-wall part hole drilling device - Google Patents

Abstract

The invention discloses a piezoceramic bending vibration type thin-walled part hole drilling processing device, the device comprises a base plate, a support plate, a mounting plate, a piezoelectric vibration mechanism and a moving shaft, the base plate has transverse and longitudinal through grooves, and There is a carrier plate screwed to the bottom plate, the bottom plate and the support plate, the support plate and the installation plate are connected by threads, the support plate is provided with a vertical slot for moving the piezoelectric vibration mechanism, and there is a through hole in the middle of the installation plate, through which There are threaded holes around the hole, and the piezoelectric vibration mechanism is provided with a flange, which is threaded with the mounting plate to achieve fixation. Shaft internally threaded through hole. The present invention is actuated by bending vibration in two orthogonal directions of piezoelectric ceramics. The vibration amplitude is proportional to the voltage amplitude of the applied signal. By adjusting the voltage amplitude of the signal, the screw speed of the drill bit can be adjusted to ensure different thicknesses and thin walls. The processing quality of the hole.

Description

Piezoelectric ceramic bending vibration drilling device for thin-walled parts

technical field

The invention belongs to the technical field of mechanical processing, and in particular relates to a piezoceramic bending vibration type thin-walled part hole drilling processing device.

Background technique

With the rapid development of high-end equipment manufacturing industry, thin-walled parts are widely used in aerospace, automobile industry and other fields due to their outstanding features such as light weight, low cost and material saving. However, due to the poor rigidity and low strength of thin-walled parts, the processing of thin-walled parts has always been a difficult problem, especially the hole processing of thin-walled parts. If the drill speed is too low, it will cause serious plastic deformation, and when the speed is too high, the temperature of the drill bit and the thin-walled parts will rise sharply, resulting in large thermoplastic deformation. It can be seen that for thin-walled parts of different thicknesses, When drilling holes, there should be a corresponding matching drill speed. However, most of the existing hole drilling devices are driven by electromagnetic motors. The output speed of the electromagnetic motor is usually a fixed value. It is difficult to adjust the drill speed according to the thickness of the thin-walled parts to be processed, and it is difficult to ensure that the holes of different thickness thin-walled parts processing quality.

Contents of the invention

Purpose of the invention: The present invention proposes a piezoceramic bending vibration type thin-walled hole drilling device in order to realize the continuous adjustment of the drill bit speed when processing thin-walled parts, and to meet the quality requirements of thin-walled parts with different thicknesses. .

Technical solution: A piezoceramic bending vibration drilling device for thin-walled parts, including a base plate, a support plate, and a mounting plate, as well as a piezoelectric vibration mechanism and a motion shaft; the base plate and the support plate are in an orthogonal position through bolts connection, the support plate and the mounting plate are also connected in a positive intersection;

The middle position of the mounting plate is provided with a through hole, and the periphery of the through hole is evenly provided with threaded holes, which are used to connect the flange used for fixing the piezoelectric vibration mechanism, and the pressure of the flange is located on the top of the electric vibration mechanism;

The piezoelectric vibrating mechanism is evenly provided with embedded grooves of uniform size and shape along the circumferential direction, which are used to install fan-shaped piezoelectric ceramics. The piezoelectric vibrating mechanism is also provided with internal thread through holes along its axial direction; the motion shaft is provided with external threads , is screwed and connected with the internal thread through hole of the piezoelectric vibration mechanism, and realizes the helical feed movement of the motion shaft along the axial direction under the vibration excitation of the fan-shaped piezoelectric ceramics, and the bottom end of the motion shaft is connected with a drill bit.

Further, a horizontal through groove and a longitudinal through groove are arranged on the base plate, a carrier plate is arranged on the base plate, threaded holes are arranged on the upper and lower surfaces of the carrier plate, the threaded holes on the upper surface are used for installing the processed parts, and the lower surface The threaded holes are connected with the bolts passing through the horizontal or vertical slots of the bottom plate to realize the fast connection of the carrier board. A cylindrical support leg is set at the bottom of the bottom plate, and a threaded hole is set on the side of the bottom plate, and the support plate is realized by bolts. Fasten the connection.

Preferably, the top of the support plate is provided with 2 parallel vertical through grooves, and the side of the mounting plate is provided with 2 threaded holes, and 2 bolts pass through the vertical through grooves on the support plate and are tightened to the threads on the side of the mounting plate. holes to realize the fast connection between the mounting plate and the supporting plate.

Preferably, an even number of sector-shaped piezoelectric ceramics is installed in each embedded groove of the piezoelectric vibration mechanism.

Preferably, the central angle subtended by the two sector sides of the sector-shaped piezoelectric ceramic is 86 degrees.

Preferably, the bottom plate and the installation plate are located on the same side of the support plate.

Beneficial effects of the present invention: The piezoceramic bending vibration type thin-walled part hole drilling device proposed by the present invention is completely different from the existing thin-walled part hole drilling device. Effect actuation, through the combination of bending vibrations in two orthogonal directions, an elliptical vibration track is formed at the screw joint, and the motion axis is further driven to realize the helical feed motion output. The vibration amplitude generated by exciting piezoelectric ceramics is proportional to the voltage amplitude of the applied electrical signal, and then by adjusting the voltage amplitude of the applied signal, the screw feed speed of the motion axis (ie, the drill bit) can be adjusted, which can be aimed at different thicknesses. For thin-walled parts, adjust the corresponding drill speed to ensure the processing quality of holes in thin-walled parts with different thicknesses.

Description of drawings

Fig. 1 shows the structural diagram of the piezoceramic bending vibration type thin-walled part hole drilling processing device;

Fig. 2 shows the bottom structure diagram of piezoelectric ceramic bending vibration type thin-wall part hole drilling processing device;

Figure 3 shows the structural diagram of the fan-shaped piezoelectric ceramics, where "+" and "-" represent the polarization directions of the corresponding piezoelectric ceramics.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

Referring to Fig. 1, Fig. 2 and Fig. 3, the present invention comprises a base plate 1, a support plate 2, a mounting plate 3, a piezoelectric vibrating mechanism 4 and a motion shaft 5, and the base plate 1 is provided with two transverse through grooves 101 and two longitudinal through grooves. Slot 103, the base plate 1 is provided with a carrier board 6, the upper and lower surfaces of the carrier board 6 are provided with threaded holes, the threaded holes on the upper surface are used to install the processed parts, and the threaded holes on the lower surface are connected with the transverse direction passing through the base plate 1. The bolt 8 connection of the through groove 101 or the longitudinal through groove 103 realizes the fastening connection of the carrier plate 6. In addition, the upper surface of the carrier plate 6 is also provided with a groove structure to avoid the drill bit 7 from damaging the carrier plate during drilling. 6. The horizontal through groove 101 on the bottom plate 1 can be used for the horizontal adjustment and movement of the carrier plate 6, and the longitudinal through groove 103 can be used for the longitudinal adjustment and movement of the carrier plate 6. The bottom of the bottom plate 1 is provided with 4 cylindrical support legs 102, the 4 The bottom ends of the two support legs 102 should be on the same plane to ensure the horizontal placement of the entire processing device; the side of the bottom plate 1 is provided with 2 threaded holes, and the fastening connection with the support plate 2 is realized by bolts 8. After connecting the support plate 2 It is in an orthogonal positional relationship with the bottom plate 1. The top of the supporting plate 2 is provided with two parallel vertical through-slots 201, and the side of the mounting plate 3 is provided with two threaded holes, and two bolts 8 pass through the vertical through-slots 201 on the supporting plate 2 and are screwed onto the mounting plate 3 The threaded holes on the side realize the fast connection between the mounting plate 3 and the supporting plate 2. After the connection, the supporting plate 2 and the mounting plate 3 are in an orthogonal position relationship. The two vertical slots 201 on the supporting plate 2 can be used for the mounting plate 3 and the piezoelectric vibration mechanism 4 move up and down as a whole, so that the drill bit 7 is close to the processed part; the bottom plate 1 and the mounting plate 3 must be located on the same side of the support plate 2 and arranged oppositely.

Further, a through hole 301 is provided in the middle of the mounting plate 3, and four threaded holes are uniformly arranged around the through hole 301; the overall cross section of the piezoelectric vibration mechanism 4 is circular, and the top of the piezoelectric vibration mechanism 4 A flange 401 is provided, and the cross-sectional diameter of the flange 401 is larger than that of other parts of the piezoelectric vibration mechanism 4. Four through holes are uniformly arranged around the flange 401 for passing through the four bolts 8 and the mounting plate. The four threaded holes on the 3 are connected to realize the fast connection of the piezoelectric vibration mechanism 4. The piezoelectric vibration mechanism 4 is evenly provided with 4 embedded grooves of the same size and shape along the circumferential direction, which are used to install the fan-shaped piezoelectric ceramics 9 , the piezoelectric vibrating mechanism 4 is also provided with an internally threaded through hole along its axial direction; the motion shaft 5 is provided with an external thread, which is screwed and connected with the internally threaded through hole of the piezoelectric vibrating mechanism 4. The helical feed movement of the motion shaft 5 along the axial direction is realized under the combined action of two orthogonal bending vibrations. The bottom end of the motion shaft 5 is connected with a drill bit 7 for drilling the processed parts.

Further, the shapes of the bottom plate 1 , the support plate 2 and the installation plate 3 involved in the present invention are all rectangular.

Further, an even number of sector-shaped piezoelectric ceramics 9 is installed in each embedded groove of the piezoelectric vibrating mechanism 4, so as to apply an excitation electric signal.

Specifically, the central angle of the two fan-shaped sides of the sector-shaped piezoelectric ceramic 9 is 86 degrees, and the arrangement of the four sector-shaped piezoelectric ceramics 9 along the same circumferential direction is shown in Figure 3, wherein the two opposite sector-shaped piezoelectric ceramics In contrast to the polarization mode, after applying an excitation electrical signal with a phase of φ, one piezoelectric ceramic becomes thicker and the other piezoelectric ceramic becomes thinner, which in turn causes the whole to generate bending vibration in one direction, and the other pair of oppositely arranged fan-shaped piezoelectric ceramics The polarization mode of the machine is similar to this, and the electric signal excitation with a phase of φ±90° (φ+90° is used for the screw feed in one direction, and φ-90° is used for the screw feed in the other direction) generates another There is an orthogonal positional relationship between the two directions of bending vibration. Through the combination of vibrations in the two orthogonal directions, the thread screwing area of the piezoelectric vibration mechanism produces an elliptical vibration trajectory, and further through the thread screwing The friction-driven motion shaft generates a helical motion output, and then drives the drill bit 7 at the end of the motion shaft 5 to realize drilling processing on the workpiece.

Claims (6)

1. The utility model provides a piezoceramics bending vibration formula thin wall spare hole bores processingequipment, includes bottom plate (1), backup pad (2) and mounting panel (3), its characterized in that: the piezoelectric vibration device also comprises a piezoelectric vibration mechanism (4) and a motion shaft (5); the bottom plate (1) is connected with the supporting plate (2) at a positive intersection position through bolts (8), and the supporting plate (2) is also connected with the mounting plate (3) at a positive intersection position;

the middle position of the mounting plate (3) is provided with a through hole (31), threaded holes are uniformly formed in the periphery of the through hole (31) and are used for being connected with a flange (41) for fixing the piezoelectric vibration mechanism (4), and the pressure of the flange (41) is positioned at the top of the piezoelectric vibration mechanism (4);

the piezoelectric vibration mechanism (4) is uniformly provided with embedded grooves with uniform size and shape along the circumferential direction and used for mounting sector piezoelectric ceramics (9), and the piezoelectric vibration mechanism (4) is also provided with an internal thread through hole along the axial direction; the moving shaft (5) is provided with external threads, is screwed with an internal thread through hole of the piezoelectric vibration mechanism (4), realizes spiral feeding movement of the moving shaft (5) along the axial direction under the vibration excitation of the fan-shaped piezoelectric ceramics (9), and the bottom end of the moving shaft (5) is connected with a drill bit (7).

2. The piezoelectric ceramic bending vibration type thin-walled workpiece drilling device according to claim 1, wherein: the device is characterized in that a transverse through groove (11) and a longitudinal through groove (13) are formed in the bottom plate (1), a carrier plate (6) is arranged on the bottom plate (1), threaded holes are formed in the upper surface and the lower surface of the carrier plate (6), the threaded holes in the upper surface are used for mounting processed parts, and the threaded holes in the lower surface and the transverse through groove (11) penetrating through the bottom plate (1);

or the bolts (8) of the longitudinal through grooves (103) are connected to realize the fastening connection of the carrier plate (6), 4 cylindrical supporting legs (1-2) are arranged at the bottom of the bottom plate (1), 2 threaded holes are formed in the side face of the bottom plate (1), and the fastening connection with the supporting plate (2) is realized through the bolts.

3. The piezoelectric ceramic bending vibration type thin-walled workpiece drilling device according to claim 1, wherein: the top of backup pad (2) is provided with 2 parallel vertical logical grooves (201), and the side of mounting panel (3) is provided with 2 screw holes, and 2 screw bolts pass vertical logical groove (201) on backup pad (2) and screw down the screw hole on mounting panel (3) side, realize mounting panel (3) and backup pad (2) fastening connection.

4. The piezoelectric ceramic bending vibration type thin-walled workpiece drilling device according to claim 1, wherein: an even number of fan-shaped piezoelectric ceramics (9) are arranged in each embedded groove of the piezoelectric vibration mechanism (4).

5. The piezoelectric ceramic bending vibration type thin-walled workpiece drilling device according to claim 4, wherein: the central angle of the two fan-shaped edges of the fan-shaped piezoelectric ceramic (9) is 86 degrees.

6. The piezoelectric ceramic bending vibration type thin-walled workpiece drilling device according to claim 1, wherein: the bottom plate (1) and the mounting plate (3) are positioned on the same side of the supporting plate (2).