阅读说明：本技术 一种激光切割机 (Laser cutting machine ) 是由 陈立波 邓永隆 于 2021-07-23 设计创作，主要内容包括：本申请涉及激光切割技术领域,尤其是涉及一种激光切割机,包括工作台、横梁、振镜装置以及激光器,横梁沿X轴方向滑动设置于工作台,工作台设有用于驱动横梁沿X轴方向移动的横向移动机构,振镜装置沿Y轴方向滑动设置于横梁,横梁设有用于驱动振镜装置沿Y轴方向移动的纵向移动机构,工作台一侧设有支撑架,激光器固设于支撑架,支撑架端部固设有第一折射镜,横梁端部固设有第二折射镜,激光器的激光束依次经过第一折射镜以及第二折射镜折射至振镜装置。本申请能够使横梁不易于受压发生形变,保证工件的加工质量。(The utility model belongs to the technical field of the laser cutting technique and specifically relates to a laser cutting machine is related to, comprises a workbench, the crossbeam, mirror device and laser instrument vibrate, the crossbeam slides along X axle direction and sets up in the workstation, the workstation is equipped with the lateral shifting mechanism that is used for driving the crossbeam along X axle direction removal, the mirror device that vibrates slides along Y axle direction and sets up in the crossbeam, the crossbeam is equipped with the longitudinal movement mechanism that is used for the drive mirror device that vibrates along Y axle direction removal, workstation one side is equipped with the support frame, the laser instrument sets firmly in the support frame, the support frame tip has set firmly first refractor, the crossbeam tip has set firmly the second refractor, the laser beam of laser instrument refracts to the mirror device that vibrates through first refractor and second refractor in proper order. This application can make the crossbeam be difficult for the pressurized emergence deformation, guarantees the processingquality of work piece.)

1. The utility model provides a laser cutting machine, including workstation (1), crossbeam (2), shake mirror device (3) and laser instrument (4), crossbeam (2) slide along X axle direction and set up in workstation (1), workstation (1) is equipped with lateral shifting mechanism (51) that are used for driving crossbeam (2) to remove along X axle direction, shake mirror device (3) and slide along Y axle direction and set up in crossbeam (2), crossbeam (2) are equipped with and are used for the drive to shake mirror device (3) and follow longitudinal movement mechanism (52) that Y axle direction removed, its characterized in that: workstation (1) one side is equipped with support frame (6), laser instrument (4) set firmly in support frame (6), support frame (6) tip has set firmly first refractor (71), crossbeam (2) tip has set firmly second refractor (72), the laser beam of laser instrument (4) is refracted to mirror device (3) that shakes through first refractor (71) and second refractor (72) in proper order.

2. The laser cutting machine according to claim 1, characterized in that: the galvanometer device (3) comprises a mounting seat (31) arranged on the cross beam (2) in a sliding mode, a galvanometer body (32) arranged on one side of the mounting seat (31), a first reflecting assembly (33) fixedly arranged on one side of the top of the galvanometer body (32), a light condensing assembly (34) fixedly arranged on one side of the bottom of the galvanometer body (32), a second reflecting assembly (35) and a switching assembly (36) which are arranged on one side of the middle of the galvanometer body (32) in a sliding mode along the X-axis direction, wherein the switching assembly (36) is fixedly arranged on one side of the middle of the galvanometer body (32) and is used for driving the second reflecting assembly (35) to slide along the X-axis direction so as to change a laser beam conduction path; the laser beam is reflected by the first reflecting component (33) and then transmitted to the light condensing component (34) to form a first light path, and the laser beam is reflected by the first reflecting component (33) and the second reflecting component (35) in sequence and then transmitted to the vibrating mirror body (32) to form a second light path.

3. The laser cutting machine according to claim 2, characterized in that: the second reflection assembly (35) comprises a second mounting frame (351) and a second reflection mirror (352), wherein the second mounting frame (351) and the second reflection mirror (352) are arranged on one side of the middle of the galvanometer body (32) in a sliding mode along the X-axis direction, and the second reflection mirror (352) is detachably mounted on the second mounting frame (351).

4. A laser cutting machine according to claim 3, characterized in that: the switching component (36) is a cylinder (361), the cylinder (361) is fixedly arranged on one side of the galvanometer body (32), and a piston rod of the cylinder (361) is connected with the second mounting frame (351).

5. A laser cutting machine according to claim 3, characterized in that: the switching assembly (36) comprises a motor (362) and a screw rod (363), the screw rod (363) is rotatably arranged on one side of the middle of the galvanometer body (32), the screw rod (363) is connected with a first nut seat thread (364) preset on the second mounting frame (351), the motor (362) is fixedly arranged on one side of the middle of the galvanometer body (32), and an output shaft of the motor (362) is connected with the screw rod (363).

6. The laser cutting machine according to claim 1, characterized in that: crossbeam (2) are equipped with magnetic grid chi (81), mirror device (3) of shaking is equipped with reading head (82) with magnetic grid chi (81) looks adaptation, reading head (82) are connected with the control unit electricity that crossbeam (2) were predetermine, the control unit is connected with longitudinal movement mechanism (52) electricity.

7. The laser cutting machine according to claim 1, characterized in that: the two cross beams (2) are arranged at intervals, and each cross beam (2) is provided with two galvanometer devices (3) which are arranged at intervals in a sliding mode; the number of the lasers (4) is four, and the lasers (4) and the four galvanometer devices (3) are arranged in a one-to-one corresponding mode.

8. The laser cutting machine according to claim 2, characterized in that: the utility model discloses a vibrating mirror, including vibrating mirror body (32), mount pad (31), adjusting screw (91) that the Z axle direction of edge direction extended is rotationally equipped with in mount pad (31) one side, adjusting screw (91) and vibrating mirror body (32) predetermined second nut seat (92) threaded connection, just rotating head (93) have set firmly at adjusting screw (91) top.

Technical Field

The application relates to the technical field of laser cutting, in particular to a laser cutting machine.

Background

The laser cutting machine focuses laser emitted from a laser into a laser beam with high power density through an optical path system. The laser beam irradiates the surface of the workpiece to enable the workpiece to reach a melting point or a boiling point, simultaneously, the high-pressure gas coaxial with the beam blows away the melted or gasified metal, and the material finally forms a kerf along with the movement of the relative position of the beam and the workpiece, so that the purpose of cutting is achieved.

The existing laser cutting machine generally comprises a workbench, a cross beam, a vibration mirror device and a laser, wherein the cross beam is arranged on the workbench in a sliding manner along the X-axis direction, the workbench is provided with a transverse moving mechanism used for driving the cross beam to move along the X-axis direction, the vibration mirror device is arranged on the cross beam in a sliding manner along the Y-axis direction, the cross beam is provided with a longitudinal moving mechanism used for driving the vibration mirror device to move along the Y-axis direction, the laser is fixedly arranged on the cross beam and used for emitting a laser beam to the vibration mirror device, and the vibration mirror device refracts the laser beam to the surface of a workpiece arranged on the top surface of the workbench so as to process the workpiece.

However, when the weight of the laser directly acts on the beam, the beam is easily pressed to deform, so that the processing quality is reduced; therefore, further improvement can be made.

Disclosure of Invention

In order to guarantee the processingquality of work piece, this application provides a laser cutting machine.

The above object of the present application is achieved by the following technical solutions:

the utility model provides a laser cutting machine, includes workstation, crossbeam, shakes mirror device and laser instrument, the crossbeam slides along X axle direction and sets up in the workstation, and the workstation is equipped with the lateral shifting mechanism that is used for driving the crossbeam to remove along X axle direction, shakes the mirror device and slides along Y axle direction and set up in the crossbeam, and the crossbeam is equipped with and is used for driving the longitudinal movement mechanism that shakes the mirror device and remove along Y axle direction, workstation one side is equipped with the support frame, the laser instrument sets firmly in the support frame, the support frame tip has set firmly first refractor, the crossbeam tip has set firmly the second refractor, the laser beam of laser instrument is in proper order through first refractor and second refractor refraction to the mirror device that shakes.

Through adopting above-mentioned technical scheme, the laser beam that the laser instrument jetted out can refract to the mirror device that shakes after the twice refraction effect of first refractor and second refractor, refract the laser beam to the workpiece surface of placing in the workstation top surface by the mirror device that shakes to process the work piece, the crossbeam only need bear the weight of the mirror device that shakes this moment, the weight of laser instrument is undertaken by the support frame, make the crossbeam be difficult for the pressurized to take place deformation, thereby guarantee the processingquality of work piece.

Optionally, the galvanometer device includes a mounting seat slidably disposed on the beam, a galvanometer body mounted on one side of the mounting seat, a first reflecting assembly fixedly disposed on one side of the top of the galvanometer body, a light condensing assembly fixedly disposed on one side of the bottom of the galvanometer body, a second reflecting assembly slidably disposed on one side of the middle of the galvanometer body along the X-axis direction, and a switching assembly fixedly disposed on one side of the middle of the galvanometer body and configured to drive the second reflecting assembly to slide along the X-axis direction to change a laser beam transmission path; the laser beam is reflected by the first reflecting component and then is transmitted to the light condensing component to form a first light path, and the laser beam is reflected by the first reflecting component and the second reflecting component in sequence and then is transmitted to the vibrating mirror body to form a second light path.

By adopting the technical scheme, in the rough machining process, the switching component drives the second reflection component to slide along the X-axis direction, so that the second reflection component is mutually staggered with the first reflection mirror and the light condensation component in the Z-axis direction, at the moment, the laser beam is reflected by the first reflection component and then is transmitted to the light condensation component to form a first light path, and the first light path is focused into a light spot with high energy density through the light condensation component to increase the cutting power and ensure the machining speed of the workpiece; in the finish machining process, the switching component drives the second reflection component to slide along the X-axis direction, so that the second reflection component is aligned with the first reflection mirror and the light condensation component in the Z-axis direction, at the moment, the laser beam is transmitted to the vibrating mirror body after being reflected by the first reflection component and the second reflection component in sequence to form a second light path, and the second light path is refracted to the surface of a workpiece placed on the top surface of the workbench through the vibrating mirror body, so that the machining quality of the workpiece is ensured.

Optionally, the second reflection assembly comprises a second installation frame and a second reflection mirror, the second installation frame and the second reflection mirror are arranged on one side of the middle of the vibrating mirror body in a sliding mode along the X-axis direction, and the second reflection mirror is detachably installed on the second installation frame.

Through adopting above-mentioned technical scheme, second mirror demountable installation is in the second mounting bracket, and the dismantlement and the change of the second mirror of being convenient for reduce the maintenance degree of difficulty.

Optionally, the switching component is a cylinder, the cylinder is fixedly arranged on one side of the galvanometer body, and a cylinder piston rod is connected with the second mounting frame.

Through adopting above-mentioned technical scheme, the cylinder direct drive second mounting bracket slides, simple structure, the realization of being convenient for.

Optionally, the switching assembly comprises a motor and a screw rod, the screw rod is rotatably arranged on one side of the middle part of the vibrating mirror body, the screw rod is in threaded connection with a first nut seat preset by the second mounting frame, the motor is fixedly arranged on one side of the middle part of the vibrating mirror body, and an output shaft of the motor is connected with the screw rod.

Through adopting above-mentioned technical scheme, the motor can drive the lead screw and rotate, and the lead screw drives the second mounting bracket through screw-thread fit mode when rotating and slides along the X axle direction, promptly, the switching module can be used for driving the second reflection subassembly and slide along the X axle direction to realize the switching between first light path and the second light path.

Optionally, the cross beam is provided with a magnetic grid ruler, the mirror vibration device is provided with a reading head matched with the magnetic grid ruler, the reading head is electrically connected with a control unit preset on the cross beam, and the control unit is electrically connected with the longitudinal moving mechanism.

By adopting the technical scheme, the reading head can sense whether the position of the vibrating mirror device is accurate or not by the magnetic grating ruler, and the position is fed back to the control unit when the position deviates, and the control unit controls the longitudinal moving mechanism to operate, so that the vibrating mirror device moves to the accurate position, and the processing quality of a workpiece is ensured.

Optionally, two cross beams are arranged, the two cross beams are arranged at intervals, and each cross beam is provided with two galvanometer devices arranged at intervals in a sliding manner; the laser device is equipped with four, four the laser device sets up with four mirror device one-to-one correspondence.

Through adopting above-mentioned technical scheme, laser cutting machine can process four work pieces simultaneously at most, improves laser cutting machine's machining efficiency.

Optionally, the mirror body that shakes slides along the Z axle direction and sets up in mount pad one side, mount pad one side rotationally is equipped with the adjusting screw who extends along the Z axle direction, adjusting screw and the second nut seat threaded connection that the mirror body that shakes predetermines, just the rotating head has set firmly at the adjusting screw top.

Through adopting above-mentioned technical scheme, when rotating adjusting screw, the mirror body that shakes can slide adjustment along Z axle direction through screw-thread fit mode.

In summary, the present application includes at least one of the following beneficial technical effects:

the laser beam only needs to bear the weight of the galvanometer device, and the weight of the laser is borne by the support frame, so that the beam is not easy to deform under pressure, and the processing quality of a workpiece is ensured;

in the rough machining process, the switching component drives the second reflection component to slide along the X-axis direction, so that the second reflection component is mutually staggered with the first reflector and the light condensation component in the Z-axis direction, at the moment, the laser beam is reflected by the first reflection component and then is transmitted to the light condensation component to form a first light path, and the first light path is focused into a light spot with high energy density through the light condensation component to increase the cutting power and ensure the machining speed of the workpiece; in the finish machining process, the switching component drives the second reflection component to slide along the X-axis direction, so that the second reflection component is aligned with the first reflection mirror and the light condensation component in the Z-axis direction, at the moment, the laser beam is transmitted to the vibrating mirror body after being reflected by the first reflection component and the second reflection component in sequence to form a second light path, and the second light path is refracted to the surface of a workpiece placed on the top surface of the workbench through the vibrating mirror body, so that the machining quality of the workpiece is ensured.

Drawings

Fig. 1 is a schematic view of the overall structure of embodiment 1 of the present application.

Fig. 2 is a schematic view of the overall structure of the galvanometer device in embodiment 1 of the present application.

Fig. 3 is a sectional view of the galvanometer device in embodiment 1 of the present application.

Fig. 4 is a schematic view of the overall structure of the galvanometer device in embodiment 2 of the present application.

Description of reference numerals: 1. a work table; 2. a cross beam; 3. a mirror-vibrating device; 31. a mounting seat; 32. a galvanometer body; 33. a first reflective component; 331. a first mounting bracket; 332. a first reflector; 34. a light focusing assembly; 341. a mounting member; 342. a condenser lens; 35. a second reflective component; 351. a second mounting bracket; 352. a second reflector; 36. a switching component; 361. a cylinder; 362. a motor; 363. a screw rod; 364. a first nut seat thread; 4. a laser; 51. a lateral movement mechanism; 52. a longitudinal movement mechanism; 53. a transverse synchronization mechanism; 6. a support frame; 71. a first refractive mirror; 72. a second refractor; 81. a magnetic grid ruler; 82. a reading head; 91. adjusting the screw rod; 92. a second nut seat; 93. and rotating the head.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses laser cutting machine.

Example 1:

referring to fig. 1, the laser cutting machine includes a table 1, a beam 2, a galvanometer device 3, and a laser 4; the worktable 1 is used for placing a workpiece, the beam 2 is arranged on the worktable 1 in a sliding manner along the X-axis direction, the worktable 1 is provided with a transverse moving mechanism 51 for driving the beam 2 to move along the X-axis direction, the galvanometer device 3 is arranged on the beam 2 in a sliding manner along the Y-axis direction, and the beam 2 is provided with a longitudinal moving mechanism 52 for driving the galvanometer device 3 to move along the Y-axis direction, so that the galvanometer device 3 can move to any position of the worktable 1 along the X-axis direction and the Y-axis direction; the laser 4 can generate a laser beam, and by emitting the laser beam of the laser 4 to the galvanometer device 3, the galvanometer device 3 can refract the laser beam to the surface of the workpiece placed on the top surface of the worktable 1, thereby processing the workpiece.

In this embodiment, a support frame 6 parallel to and spaced from the cross beam 2 is disposed on one side of the workbench 1, the support frame 6 is slidably disposed on the workbench 1 along the X-axis direction, and the workbench 1 is provided with a transverse synchronization mechanism 53 for driving the support frame 6 to move along the X-axis direction, wherein the structure principle of the transverse synchronization mechanism 53 is the same as that of the transverse movement mechanism 51, which is not described herein again, so that the support frame 6 can move synchronously along with the cross beam 2 along the X-axis direction.

The laser 4 is fixedly arranged on the support frame 6, and the laser 4 emits laser beams towards the Y-axis direction; a first refractor 71 is fixedly arranged at the end part of the support frame 6, and an included angle of 45 degrees is formed between the first refractor 71 and the Y-axis direction, so that laser beams are emitted towards the X-axis direction after being refracted by the first refractor 71; a second refractor 72 is fixedly arranged at the end part of the beam 2, and a 45-degree included angle is formed between the second refractor 72 and the X-axis direction, so that the laser beam is emitted towards the Y-axis direction after being refracted by the second refractor 72, the laser beam emitted by the laser 4 can be refracted to the vibrating mirror device 3 after being refracted by the first refractor 71 and the second refractor 72 twice, and the laser beam is refracted to the surface of a workpiece placed on the top surface of the workbench 1 by the vibrating mirror device 3 so as to process the workpiece; at the moment, the beam 2 only needs to bear the weight of the galvanometer device 3, and the weight of the laser 4 is borne by the support frame 6, so that the beam 2 is not easy to deform under pressure, and the processing quality of a workpiece is ensured.

In the embodiment, two beams 2 are provided, the two beams 2 are arranged in parallel at intervals, and the two beams 2 are arranged independently; every crossbeam 2 all slides and is equipped with two mirror devices 3 that shake, and two mirror devices 3 that shake are arranged at interval each other, and four mirror devices 3 that shake set up each other independently.

The number of the lasers 4 is four, the four lasers 4 are fixedly arranged on the support frame 6 in an array manner, and the four lasers 4 and the four galvanometer devices 3 are arranged in a one-to-one correspondence manner; correspondingly, 6 both ends of support frame have set firmly two first refractors 71 respectively, 2 both ends of crossbeam have set firmly two second refractors 72 respectively, four first refractors 71 and four second refractors 72 one-to-one sets up, and corresponding laser instrument 4 refracts through corresponding first refractor 71 and second refractor 72 with shaking the laser beam between the mirror device 3, the laser beam that makes four laser instrument 4 jets out refracts to four mirror devices 3 that shake respectively, thereby make laser cutting machine process four work pieces simultaneously at most, improve laser cutting machine's machining efficiency.

Referring to fig. 2 and 3, in the present embodiment, the galvanometer device 3 includes a mounting base 31, a galvanometer body 32, a first reflecting assembly 33, a light focusing assembly 34, a second reflecting assembly 35, and a switching assembly 36; the mounting seat 31 is slidably disposed on the cross beam 2, and the longitudinal moving mechanism 52 directly acts on the mounting seat 31 to drive the mounting seat 31 to move along the Y-axis direction; the galvanometer body 32 can refract laser beams to the surface of a workpiece, a sliding block is fixedly arranged on one side of the galvanometer body 32, and a sliding rail which extends along the Z-axis direction and is matched with the sliding block in a sliding manner is fixedly arranged on one side of the mounting seat 31, so that the galvanometer body 32 can be arranged on one side of the mounting seat 31 in a sliding manner along the Z-axis direction; the adjusting screw 91 that extends along the Z axle direction is rotationally equipped with in mount pad 31 one side, and the adjusting screw 91 top is equipped with rotating head 93, makes the staff can rotate adjusting screw 91 through rotating head 93, shakes mirror body 32 one side and sets firmly the second nut seat 92 that is connected the adaptation with adjusting screw 91, and when making rotating adjusting screw 91, the mirror body 32 that shakes can slide the adjustment along the Z axle direction through the screw-thread fit mode.

The condensing assembly 34 includes a mount 341 and a condensing lens; wherein, installed part 341 sets firmly in galvanometer body 32 bottom one side, and the light trap has been seted up to installed part 341, and condensing lens sets firmly in the light trap, and condensing lens can focus the laser beam for the facula of high energy density to increase cutting power, be applicable to rough machining process.

The first reflection assembly 33 includes a first mounting frame 331 and a first reflection mirror 332; wherein, first mounting bracket 331 sets firmly in galvanometer body 32 top one side, and first speculum 332 passes through threaded connection mode demountable installation in first mounting bracket 331, and the speculum forms 45 degrees contained angles with the Z axle direction, makes the laser beam that jets out towards the Y axle direction jet out towards the Z axle direction after the refraction effect of first speculum 332.

Second reflective assembly 35 includes a second mount 351 and a second mirror 352; wherein, second mounting bracket 351 one side has set firmly the slider, shake mirror body 32 middle part one side and set firmly along the X axle direction extend and with the slide rail of slider looks slip adaptation, make second mounting bracket 351 can slide along the X axle direction and set up in shake mirror body 32 middle part one side, second reflector 352 passes through threaded connection mode detachably and installs in second mounting bracket 351, and second reflector 352 forms 45 degrees contained angles with Z axle direction, make the laser beam that jets out towards Z axle direction jet out towards Y axle direction behind the refraction effect of second reflector 352.

The switching component 36 is fixedly arranged on one side of the middle part of the galvanometer body 32, the switching component 36 in the embodiment is an air cylinder 361, and in other embodiments, modes such as an oil cylinder and the like can be adopted as the switching component 36; the cylinder 361 is fixedly arranged on one side of the galvanometer body 32, and a piston rod of the cylinder 361 is connected with the second mounting frame 351, so that the switching assembly 36 can be used for driving the second reflecting assembly 35 to slide along the X-axis direction.

In the rough machining process, the switching component 36 drives the second reflecting component 35 to slide along the X-axis direction, so that the second reflecting component 35 is mutually staggered with the first reflecting mirror 332 and the light condensing component 34 in the Z-axis direction, at this time, the laser beam is reflected by the first reflecting component 33 and then is transmitted to the light condensing component 34 to form a first light path, and the first light path is focused into a light spot with high energy density through the light condensing component 34 to increase the cutting power and ensure the machining speed of the workpiece; in the finish machining process, the switching component 36 drives the second reflection component 35 to slide along the X-axis direction, so that the second reflection component 35 is aligned with the first reflection mirror 332 and the light condensation component 34 in the Z-axis direction, at this time, the laser beam is reflected by the first reflection component 33 and the second reflection component 35 in sequence and then is transmitted to the galvanometer body 32 to form a second light path, and the second light path is refracted to the surface of the workpiece placed on the top surface of the workbench 1 through the galvanometer body 32, so that the machining quality of the workpiece is ensured.

Referring to fig. 1, in this embodiment, the beam 2 is fixedly provided with magnetic scale bars 81 arranged along the length direction thereof, the mounting seat 31 of each galvanometer device 3 is fixedly provided with a reading head 82 adapted to the magnetic scale bars 81, and the reading head 82 can sense the position of the galvanometer device 3 through the magnetic scale bars 81, and the precision can reach 1 um; the crossbeam 2 is provided with a control unit, the control unit adopts a 51-chip microcomputer as a main control chip, and the reading head 82 and the control unit as well as the control unit and the longitudinal moving mechanism 52 are electrically connected through preset wires. The reading head 82 can sense whether the position of the galvanometer device 3 is accurate or not by the magnetic grating ruler 81, and feeds back the position to the control unit when deviation occurs, and the control unit controls the longitudinal moving mechanism 52 to operate, so that the galvanometer device 3 moves to the accurate position, and the processing quality of a workpiece is ensured.

Example 2:

the difference between this embodiment and embodiment 1 is the structure of the switching unit 36.

Referring to fig. 1 and 4, in particular, in the present embodiment, the switching assembly 36 includes a motor 362 and a screw rod 363; the lead screw 363 extends along the X-axis direction, the lead screw 363 is rotatably arranged on one side of the middle of the galvanometer body 32, the second mounting rack 351 is fixedly provided with a first nut seat matched with the lead screw 363 in a connected mode, the first nut seat is in threaded connection with the lead screw 363, the motor 362 is fixedly arranged on one side of the middle of the galvanometer body 32, an output shaft of the motor 362 is connected with one end of the lead screw 363, the motor 362 can drive the lead screw 363 to rotate, the second mounting rack 351 is driven to slide along the X-axis direction in a threaded matching mode when the lead screw 363 rotates, namely, the switching assembly 36 can be used for driving the second reflecting assembly 35 to slide along the X-axis direction, so that switching between the first light path and the second light path is realized.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.