Positioning mechanism of laser cutting machine

Abstract

The utility model discloses a laser cutting machine positioning mechanism which comprises an operation table, a protective cover is fixedly connected to the upper surface of the operation table, a stroke groove is formed in the upper surface of the operation table, a servo motor is fixedly installed on the surface of one side of the operation table, and a lead screw is fixedly installed on an output shaft of the servo motor through a coupler. One end of the lead screw penetrates through and extends into the operation table, the outer surface of one end of the lead screw is installed on the inner wall of one side of the operation table, and the outer surface of the lead screw is in threaded connection with a threaded block. And therefore, operation is convenient, waste generated around the workpiece is reduced, and the problems that when a pressing plate is matched with rotation of a bolt to fix the square workpiece, operation is tedious, the surface of the workpiece is shielded, and waste around the workpiece is increased are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser cutting machines, in particular to a positioning mechanism for a laser cutting machine. Background Art

[0002] Laser cutting machine is a kind of cutting equipment, which mainly irradiates the workpiece with a high-power density laser beam to melt the workpiece, and then blows out non-oxidizing gas through a nozzle coaxial with the beam, and discharges the liquid metal under the pressure of the gas to form an incision. Laser cutting machine has the characteristics of high precision, fast cutting, and is not limited to cutting pattern restrictions. Therefore, it is widely used in the fields of automobiles, machinery, electricity, hardware and electrical appliances. At present, when some laser cutting machines are used, workers will place or fix the workpiece on the surface of the cutting table, and use a moving device to move the workpiece from the cutting table surface to the processing area, and then use the laser cutting machine to cut the workpiece on the cutting table surface.

[0003] When an existing cutting table positions and fixes a square workpiece, a pressure plate is usually used to press the top of the workpiece by rotating the bolt. This positioning method requires repeated rotation of the bolt when the workpiece is fixed and removed, which is cumbersome to operate. In addition, when the pressure plate is pressed on the top of the workpiece, the top of the workpiece is blocked, which can easily limit the cutting range of the workpiece surface, thereby causing a serious increase in the problem of waste around the workpiece. Utility Model Content

[0004] The purpose of the utility model is to provide a positioning mechanism for a laser cutting machine to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a positioning mechanism for a laser cutting machine, comprising an operating table, a protective cover is fixedly connected to the upper surface of the operating table, a travel groove is opened on the upper surface of the operating table, a servo motor is fixedly installed on one side surface of the operating table, a screw rod is fixedly installed on the output shaft of the servo motor through a coupling, one end of the screw rod penetrates and extends to the inside of the operating table, the outer surface of one end of the screw rod is installed with the inner wall of one side of the operating table, and the outer surface of the screw rod is threadedly connected with a threaded block;

[0006] A positioning device is provided on the upper surface of the threaded block, and the positioning device comprises a moving block, and the lower surface of the moving block is fixedly connected to the upper surface of the threaded block.

[0007] Preferably, one end of the moving block passes through the travel slot and extends to the upper surface of the operating table, one end of the moving block is fixedly connected to the cutting table, and the upper surface of the operating table is provided with symmetrically distributed guide grooves.

[0008] Preferably, a guide slider is slidably connected to the inner wall of the guide slot, the upper surfaces of the two guide sliders are fixedly connected to the lower surface of the cutting table, and a positioning rotating rod is installed on the inner bottom wall of the cutting table through a bearing.

[0009] Preferably, a flat gear is fixedly sleeved on the outer surface of the positioning rotating rod, one end of the positioning rotating rod is fixedly connected to a driving block, the upper surface of the driving block is hinged with swing blocks distributed in a ring array through a pin shaft, and the inner walls on both sides of the cutting table are fixedly connected to guide rods.

[0010] Preferably, a rack is movably sleeved on the outer surface of the guide rod, the tooth surface of the rack is meshed with the tooth surface of the spur gear, and a small servo electric cylinder is fixedly mounted on the inner wall of one side of the cutting table.

[0011] Preferably, one end of the piston rod of the small servo electric cylinder is fixedly connected to a pressure block, the back side of the pressure block is fixedly connected to the front side of the rack, and the upper surface of the cutting table is provided with limiting slide grooves distributed in a ring array.

[0012] Preferably, the inner walls on both sides of the limiting slide are fixedly connected to the limiting rod, and the outer surface of the limiting rod is movably sleeved with a positioning block, and the two side surfaces of the positioning block are in sliding contact with the inner walls on both sides of the limiting slide, and the lower surface of the positioning block is hinged to one end of the swing block through a pin shaft.

[0013] Compared with the prior art, the beneficial effects of the utility model are: the positioning device can realize the rapid positioning, clamping and disassembly of the workpiece, and will not block the top of the workpiece, thereby making the operation convenient and reducing the waste generated around the workpiece, thereby solving the problem that when fixing the square workpiece by rotating the pressure plate and the bolt, the operation is not only cumbersome, but also the surface of the workpiece is blocked, increasing the waste around the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 A three-dimensional diagram of the operating table structure of a laser cutting machine positioning mechanism proposed by the utility model;

[0016] Figure 3 This is a three-dimensional diagram of the cutting table structure of a laser cutting machine positioning mechanism proposed by the utility model;

[0017] Figure 4 This is an exploded diagram of the drive block structure of a laser cutting machine positioning mechanism proposed by the utility model.

[0018] In the figure: 1, operating table; 2, protective cover; 3, travel groove; 4, servo motor; 5, lead screw; 6, threaded block; 7, moving block; 71, cutting table; 72, guide slide; 73, guide slider; 74, positioning rotating rod; 75, flat gear; 76, driving block; 77, swing block; 78, guide rod; 79, rack; 710, small servo electric cylinder; 711, pressure block; 712, limit slide; 713, limit rod; 714, positioning block. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-Figure 4 The utility model provides a technical solution: a positioning mechanism for a laser cutting machine, comprising an operating table 1, a protective cover 2 is fixedly connected to the upper surface of the operating table 1, a travel groove 3 is opened on the upper surface of the operating table 1, a servo motor 4 is fixedly installed on one side surface of the operating table 1, a screw rod 5 is fixedly installed on the output shaft of the servo motor 4 through a coupling, one end of the screw rod 5 penetrates and extends to the inside of the operating table 1, the outer surface of one end of the screw rod 5 is installed with the inner wall of one side of the operating table 1, and the outer surface of the screw rod 5 is threadedly connected with a threaded block 6;

[0021] A positioning device is provided on the upper surface of the threaded block 6 , and the positioning device includes a moving block 7 , and the lower surface of the moving block 7 is fixedly connected to the upper surface of the threaded block 6 .

[0022] Furthermore, one end of the moving block 7 passes through the travel groove 3 and extends to the upper surface of the operating table 1. One end of the moving block 7 is fixedly connected to the cutting table 71. The upper surface of the operating table 1 is provided with symmetrically distributed guide grooves 72. When the workpiece on the cutting table 71 is laser cut, the protective cover 2 plays a role in protecting its exterior. The servo motor 4 drives the screw rod 5 to rotate clockwise. The rotation of the screw rod 5 drives the threaded block 6 to move through the cooperation of the moving block 7 and the travel groove 3.

[0023] Furthermore, the inner wall of the guide groove 72 is slidably connected with a guide slider 73, the upper surfaces of the two guide sliders 73 are fixedly connected to the lower surface of the cutting table 71, and the inner bottom wall of the cutting table 71 is installed with a positioning rotating rod 74 through a bearing. The use of the guide groove 72 and the guide slider 73 plays a role in cooperating with the cutting table 71 to achieve stable movement.

[0024] Furthermore, a flat gear 75 is fixedly sleeved on the outer surface of the positioning rotating rod 74, and a driving block 76 is fixedly connected to one end of the positioning rotating rod 74. The upper surface of the driving block 76 is hinged with swing blocks 77 distributed in a ring array through pins, and the inner walls on both sides of the cutting table 71 are fixedly connected with guide rods 78. The positioning rotating rod 74 plays a role in stabilizing the cooperation with the flat gear 75 and the driving block 76 for positioning rotation.

[0025] Furthermore, a rack 79 is movably sleeved on the outer surface of the guide rod 78, and the tooth surface of the rack 79 meshes with the tooth surface of the flat gear 75. A small servo electric cylinder 710 is fixedly installed on the inner wall of one side of the cutting table 71, and the guide rod 78 serves to guide and limit the movement of the rack 79.

[0026] Furthermore, one end of the piston rod of the small servo electric cylinder 710 is fixedly connected to a pressure block 711, the back of the pressure block 711 is fixedly connected to the front of the rack 79, and the upper surface of the cutting table 71 is provided with limiting grooves 712 distributed in a ring array. A pressure sensor is arranged in the pressure block 711, which stops working when the squeezing force of the piston rod of the small servo electric cylinder 710 on the pressure block 711 reaches a preset value, thereby being suitable for positioning workpieces of different sizes.

[0027] Furthermore, the inner walls on both sides of the limiting slide 712 are fixedly connected to the limiting rod 713, and the outer surface of the limiting rod 713 is movably sleeved with a positioning block 714. The two side surfaces of the positioning block 714 are in sliding contact with the inner walls on both sides of the limiting slide 712. The lower surface of the positioning block 714 is hinged to one end of the swing block 77 through a pin shaft. The cooperation between the limiting slide 712 and the limiting rod 713 guides and limits the movement of the positioning block 714.

[0028] The positioning device can realize rapid positioning, clamping and disassembly of the workpiece without blocking the top of the workpiece, thereby facilitating operation and reducing waste generated around the workpiece. This solves the problem that when fixing a square workpiece by rotating the pressure plate and the bolt, the operation is not only cumbersome but also the surface of the workpiece is blocked, increasing the waste around the workpiece.

[0029] Working principle: Step 1, when in use, place the workpiece to be processed above the cutting table 71, start the piston rod of the small servo electric cylinder 710 to extend, thereby driving the rack 79 to move through the pressure block 711, and the movement of the rack 79 drives the positioning rotating rod 74 to rotate through the meshing flat gear 75, and the rotation of the positioning rotating rod 74 drives the swing block 77 to rotate and swing through the driving block 76, thereby driving the positioning block 714 to move through the cooperation of the limiting slide groove 712 and the limiting rod 713, and clamping and positioning the workpiece around the positioning block 714. When the positioning block 714 clamps the workpiece stably, the flat gear 75 stops rotating and the rack 79 also stops moving. Since a pressure sensor is provided in the pressure block 711, the extrusion force generated by the piston rod of the small servo electric cylinder 710 on the pressure block 711 reaches a preset value, and the movable rod of the small servo electric cylinder 710 stops moving;

[0030] Step 2: After the workpiece is stably clamped and positioned, the servo motor 4 is started to drive the screw rod 5 to rotate clockwise. The rotation of the screw rod 5 drives the threaded block 6 to move through the cooperation of the moving block 7 and the stroke groove 3, thereby driving the cutting table 71 to move. The movement of the cutting table 71 is stably moved through the cooperation of the guide slide groove 72 and the guide slide block 73, so that the cutting table 71 moves to the inside of the protective cover 2 for laser cutting. After cutting the outer wall, the servo motor 4 is started to drive the screw rod 5 to rotate counterclockwise, so that the cutting table 71 moves in the opposite direction until it moves out of the protective cover 2.

[0031] Step three, at this time, the piston rod of the small servo electric cylinder 710 is started to retract, and the rack 79 is driven to move in the opposite direction through the pressure block 711, thereby driving the positioning rotating rod 74 to rotate in the opposite direction through the meshing flat gear 75, so that the driving block 76 drives the positioning block 714 to move in the opposite direction through the cooperation of the swing block 77, so that the positioning block 714 is separated from the workpiece, and the workpiece after cutting can be removed.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning mechanism for a laser cutting machine, comprising an operating table (1), characterized in that: A protective cover (2) is fixedly connected to the upper surface of the operating table (1), a travel groove (3) is provided on the upper surface of the operating table (1), a servo motor (4) is fixedly mounted on one side surface of the operating table (1), a screw rod (5) is fixedly mounted on the output shaft of the servo motor (4) via a coupling, one end of the screw rod (5) penetrates and extends into the interior of the operating table (1), an outer surface of one end of the screw rod (5) is mounted on an inner wall of one side of the operating table (1), and a threaded block (6) is threadedly connected to the outer surface of the screw rod (5); The upper surface of the threaded block (6) is provided with a positioning device, and the positioning device comprises a moving block (7), and the lower surface of the moving block (7) is fixedly connected to the upper surface of the threaded block (6).

2. A laser cutting machine positioning mechanism according to claim 1, characterized in that: One end of the moving block (7) passes through the travel groove (3) and extends to the upper surface of the operating table (1); one end of the moving block (7) is fixedly connected to a cutting table (71); and the upper surface of the operating table (1) is provided with symmetrically distributed guide grooves (72).

3. A laser cutting machine positioning mechanism according to claim 2, characterized in that: The inner wall of the guide slide groove (72) is slidably connected to a guide slider (73), the upper surfaces of the two guide sliders (73) are fixedly connected to the lower surface of the cutting table (71), and the inner bottom wall of the cutting table (71) is equipped with a positioning rotating rod (74) via a bearing.

4. A laser cutting machine positioning mechanism according to claim 3, characterized in that: A flat gear (75) is fixedly sleeved on the outer surface of the positioning rotating rod (74), a driving block (76) is fixedly connected to one end of the positioning rotating rod (74), and swing blocks (77) distributed in a ring array are hingedly connected to the upper surface of the driving block (76) via a pin shaft, and guide rods (78) are fixedly connected to the inner walls of both sides of the cutting table (71).

5. A laser cutting machine positioning mechanism according to claim 4, characterized in that: A rack (79) is movably sleeved on the outer surface of the guide rod (78), the tooth surface of the rack (79) meshes with the tooth surface of the spur gear (75), and a small servo electric cylinder (710) is fixedly mounted on the inner wall of one side of the cutting table (71).

6. A laser cutting machine positioning mechanism according to claim 5, characterized in that: One end of the piston rod of the small servo electric cylinder (710) is fixedly connected to a pressure block (711), the back side of the pressure block (711) is fixedly connected to the front side of the rack (79), and the upper surface of the cutting table (71) is provided with limiting sliding grooves (712) distributed in a ring array.

7. A laser cutting machine positioning mechanism according to claim 6, characterized in that: The inner walls on both sides of the limiting slide groove (712) are fixedly connected to the limiting rod (713), and the outer surface of the limiting rod (713) is movably sleeved with a positioning block (714). The two side surfaces of the positioning block (714) are in sliding contact with the inner walls on both sides of the limiting slide groove (712), and the lower surface of the positioning block (714) is hinged to one end of the swing block (77) via a pin shaft.

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