Cutting head anti-collision device for numerical control cutting machine

Abstract

The utility model discloses a cutting head anti-collision device for a numerical control cutting machine. The cutting head anti-collision device comprises a base plate, a floating plate and a hose clamp. The base plate and the floating plate are both of a circular metal plate structure, the base plate is perpendicularly fixed to a mounting frame of a flat plate structure, mounting hole sites are formed in the mounting frame, a hose clamp used for clamping a laser cutting head is embedded in the floating plate, the base plate and the floating plate are in floating connection through an elastic limiting stopper, and the base plate and the floating plate can be separated from each other. The floating disc is arranged on the base plate and can be reset through an elastic limiting stopper without external force, at least two sets of embedded through holes are formed in the floating disc, a proximity switch used for monitoring the relative displacement distance between the base plate and the floating disc is embedded in each set of embedded through holes, and no shielding exists between the sensing end of each proximity switch and the upper surface of the base plate. The anti-collision device for the laser cutting head has the advantages of being capable of protecting the expensive laser cutting head in time when the accident of'knife collision 'occurs.

Description

Technical Field

[0001] The utility model belongs to the technical field of numerical control cutting, and particularly relates to a cutting head anti-collision device for a numerical control cutting machine. Background Art

[0002] Laser cutting machine is to focus the laser emitted from the laser into a high power density laser beam through the optical path system. The laser beam irradiates the surface of the workpiece, causing the workpiece to reach the melting point or boiling point, and at the same time, the high-pressure gas coaxial with the beam blows away the molten or vaporized metal; as the relative position of the beam and the workpiece moves, the material is eventually cut, thereby achieving the purpose of cutting.

[0003] The patent document with publication number CN114473239A discloses a fully CNC cutting mechanism for steel and wood furniture, comprising a base, a sliding mechanism is arranged on the base, a fixed seat is arranged on the sliding mechanism, a laser cutting head is arranged on the fixed seat, a smoke and dust collecting mechanism is arranged on the fixed seat, an exhaust mechanism is arranged outside the base, a waste sorting mechanism is arranged inside the base, a plate is placed on the waste sorting mechanism, a support plate is welded outside the base, and a water tank is placed on the support plate. The present invention relates to a fully CNC cutting mechanism for steel and wood furniture and a cutting method thereof, which has the characteristics of no smoke and dust on site during cutting and automatic falling of waste.

[0004] The laser cutting head and fixed seat of the above-mentioned CNC cutting machine are fixed. When misoperation or misprogramming causes a "knife collision" accident between the laser cutting head and the workpiece, it is easy to cause damage to the expensive laser cutting head. In severe cases, the laser cutting head may be scrapped, causing heavy losses. Utility Model Content

[0005] The purpose of the utility model is to provide a cutting head anti-collision device for a numerically controlled cutting machine, so as to solve the problems mentioned in the above background technology.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A cutting head anti-collision device for a CNC cutting machine comprises: a chassis, a floating plate, and a throat clamp; the chassis and the floating plate are both circular metal plate structures, the chassis is vertically fixed on a mounting frame with a flat plate structure, the mounting frame is provided with mounting holes, a throat clamp for clamping a laser cutting head is embedded in the floating plate, the chassis and the floating plate are floatingly connected by an elastic limiter, the chassis and the floating plate can be separated from each other, and can be reset by the elastic limiter in the absence of external force, the floating plate is provided with at least two groups of embedded through holes, each group of embedded through holes is embedded with a proximity switch for monitoring the relative displacement distance between the chassis and the floating plate, and there is no obstruction between the proximity switch sensing end and the upper surface of the chassis.

[0008] Furthermore, in order to realize the floating connection between the chassis and the floating plate, the elastic limiter includes: a bolt cap, a screw, a spring, a cap nut, and a washer; at least three groups of countersunk holes are provided on the chassis, and an elastic limiter is fixed in each group of countersunk holes; the main body of the elastic limiter is a screw, which penetrates the countersunk hole and the floating plate, and a cap nut is threadedly fixed above the floating plate, a bolt cap is provided at the lower end of the screw, a washer is fixed at the bottom of the countersunk hole and the transition position of the through hole, a spring is provided between the washer and the bolt cap and is embedded in the screw, and the spring has an elastic tendency to stretch. Under the action of the elastic force of the spring, the chassis and the floating plate are pressed together.

[0009] Furthermore, in order to facilitate the fixation of the laser cutting head, the main body of the throat clamp is a cylindrical pipe sleeve with a vertical opening, the inner wall of the pipe sleeve is provided with spoke teeth distributed in a circular array, and both sides of the vertical opening of the pipe sleeve are respectively provided with a parallel strip plate to form a bolt strip plate, and the number of the clamping bolts is at least one group, and the clamping bolt penetrates one of the bolt strip plates and then cooperates with the other bolt strip plate through a thread.

[0010] Furthermore, in order to prevent relative rotation between the throat clamp and the floating disk during use, which would affect the cutting accuracy, the outer tube wall of the pipe sleeve is provided with vertical grooves or convex grooves to form anti-rotation vertical grooves, and the embedded position of the floating disk embedded throat clamp is provided with an embedded groove or embedded strip matching the anti-rotation vertical grooves, and the anti-rotation vertical grooves are embedded inside or outside the embedded groove / embedded strip.

[0011] Furthermore, in order to further fix the throat clamp and the floating plate, and to facilitate the disassembly of the throat clamp, a threaded hole is provided on the outer wall of the floating plate, and the inner thread of the threaded hole is matched with a fixing bolt, and the fixing bolt is provided with a bar tooth or a wheel for convenient hand-tightening. The inner end of the fixing bolt is pressed against the outer pipe wall of the pipe sleeve, thereby completely fixing the throat clamp in the floating plate.

[0012] Furthermore, in order to prevent the spoke teeth from damaging the laser cutting head, a buffer pad is provided at the inner end of the spoke teeth, and is arranged between the spoke teeth and the laser cutting head.

[0013] Furthermore, in order to provide a movement space for the buffering movement of the laser cutting head when the laser cutting head collides, a reserved activity cavity for the deflection movement of the laser cutting head is provided at the bottom of the chassis.

[0014] In summary, the utility model has the following beneficial effects:

[0015] When a "knife collision" accident occurs, the expensive laser cutting head can be protected in time: through the establishment of the chassis, floating plate, elastic limiter and proximity switch, when the laser cutting head and the workpiece have a "knife collision" accident due to misoperation or misprogramming during production, the laser cutting head is limited by the workpiece and deflected slightly. At this time, the throat clamp fixed to the laser cutting head moves with it, and then the floating plate fixed with the throat clamp moves with it. At this time, an angular deflection occurs between the chassis and the floating plate, and the springs of some elastic limiters are in a compressed state. When an angular deflection occurs between the chassis and the floating plate, it means that the relative distance between the chassis and the floating plate has changed. At this time, the proximity switch on the floating plate detects The laser cutting machine detects the change in distance and converts the change signal into an electrical signal and transmits it to the CNC control center of the CNC cutting machine. The CNC control center responds immediately and stops the CNC mobile end connected to the mounting bracket, which promptly reduces the damage to the laser cutting head caused by the workpiece. It also issues an audible and visual alarm and calls the maintenance personnel to troubleshoot. After receiving the alarm, the maintenance personnel perform troubleshooting operations: reasonably separate the "collision" laser cutting head and the workpiece. At this time, under the elongation force of the spring, the chassis and the floating plate are pressed together to reset the chassis and the floating plate. The maintenance personnel then check the procedures and operating problems, eliminate the causes of the accident, and avoid continuous damage to the laser cutting head during the next processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the reserved active cavity in the utility model;

[0018] Figure 3 It is a structural schematic diagram of the throat hoop in the utility model;

[0019] Figure 4 It is a structural schematic diagram of the elastic limiter in the utility model;

[0020] Figure 5 yes Figure 3 A schematic diagram of the structure enlargement in the middle;

[0021] In the figure, 1. mounting frame; 2. chassis; 3. floating plate; 4. throat clamp; 5. proximity switch; 6. elastic limiter; 7. fixing bolt; 8. laser cutting head; 21. countersunk hole; 22. reserved movable cavity; 41. pipe sleeve; 42. spoke teeth; 43. bolt strip; 44. clamping bolt; 45. buffer pad; 46. anti-rotation vertical strip; 61. bolt cap; 62. screw; 63. spring; 64. cap nut; 65. washer. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] Example:

[0024] See also Figure 1-Figure 5 The utility model provides a technical solution: a cutting head anti-collision device for a CNC cutting machine, comprising: a chassis 2, a floating plate 3, and a throat clamp 4; the chassis 2 and the floating plate 3 are both circular metal plate structures, the chassis 2 is vertically fixed on a mounting frame 1 with a flat plate structure, the mounting frame 1 is provided with mounting holes, a throat clamp 4 for clamping a laser cutting head 8 is embedded in the floating plate 3, the chassis 2 and the floating plate 3 are floatingly connected by an elastic limiter 6, the chassis 2 and the floating plate 3 can be separated from each other, and can be reset by the elastic limiter 6 without external force, the floating plate 3 is provided with at least two groups of embedded through holes, each group of embedded through holes is embedded with a proximity switch 5 for monitoring the relative displacement distance between the chassis 2 and the floating plate 3, and there is no obstruction between the sensing end of the proximity switch 5 and the upper surface of the chassis 2.

[0025] The elastic limiter 6 comprises: a bolt cap 61, a screw rod 62, a spring 63, a cap nut 64, and a washer 65; at least three groups of countersunk holes 21 are provided on the chassis 2, and an elastic limiter 6 is fixed in each group of countersunk holes 21; the main body of the elastic limiter 6 is a screw rod 62, which penetrates the countersunk holes 21 and the floating plate 3, and a cap nut 64 is threadedly fixed above the floating plate 3, a bolt cap 61 is provided at the lower end of the screw rod 62, a washer 65 is fixed at the transition position between the countersunk hole bottom and the through hole of the countersunk hole 21, a spring 63 is provided between the washer 65 and the bolt cap 61 and is embedded on the screw rod 62, the spring 63 has an elastic tendency to stretch, and under the elastic force of the spring 63, the chassis 2 and the floating plate 3 are pressed together.

[0026] The main body of the throat clamp 4 is a cylindrical pipe sleeve 41 with a vertical opening. The inner wall of the pipe sleeve 41 is provided with spoke teeth 42 distributed in a circular array. Both sides of the vertical opening of the pipe sleeve 41 are respectively provided with a parallel strip plate to form a bolt strip plate 43. The number of the clamping bolts 44 is at least one group. The clamping bolts 44 penetrate one of the bolt strip plates 43 and then cooperate with the other bolt strip plate 43 through threads.

[0027] The outer tube wall of the tube sleeve 41 is provided with vertical concave or convex lines to form anti-rotation vertical lines 46 , and the embedded position of the floating plate 3 embedded in the throat clamp 4 is provided with an embedded groove or an embedded strip matching the anti-rotation vertical lines 46 .

[0028] The outer wall of the floating plate 3 is provided with a threaded hole, and a fixing bolt 7 is matched with the inner thread of the threaded hole. The fixing bolt 7 is provided with a tooth or a wheel for convenient manual tightening. The inner end of the fixing bolt 7 is tightly pressed against the outer wall of the pipe sleeve 41.

[0029] A buffer pad 45 is provided at the inner end of the spoke tooth 42 and is arranged between the spoke tooth 42 and the laser cutting head 8 .

[0030] A reserved activity cavity 22 for the deflection activity of the laser cutting head 8 is provided at the bottom of the chassis 2 .

[0031] The proximity switch 5 is an inductive proximity switch, and the reference model thereof is: I FM-I G6073.

[0032] When in use, the chassis 2 and the floating plate 3 are fixed as a whole to the CNC mobile end of the CNC cutting machine by using the mounting frame 1; all the clamping bolts 44 on the throat hoop 4 are loosened, and the laser cutting head 8 is placed in the throat hoop 4, and the laser cutting head 8 is clamped by all the spoke teeth 42. At this time, the buffer pad 45 is used to prevent the spoke teeth 42 from damaging the laser cutting head 8, and then all the clamping bolts 44 on the throat hoop 4 are locked, and the laser cutting head 8 and the throat hoop 4 are relatively fixed, and then the throat hoop 4 with the laser cutting head 8 installed is placed in the floating plate 3, and then locked. The fixing bolt 7 will then completely fix the throat clamp 4 in the floating plate 3. At this time, the anti-rotation vertical lines 46 on the throat clamp 4 are used to prevent the throat clamp 4 and the floating plate 3 from rotating relative to each other during use. The proximity switch 5 and the data acquisition terminal of the CNC control center of the CNC cutting machine are electrically connected using a wire, and then the laser cutting head 8 is "calibrated". The utility model can be used for normal production. When the laser cutting head 8 and the workpiece have a "knife collision" accident due to misoperation or misprogramming during production, the laser cutting head 8 is limited by the workpiece and micro- The amount of deflection, at this time, the throat hoop 4 fixed with the laser cutting head 8 follows the movement, and then the floating plate 3 fixed with the throat hoop 4 follows the movement, at this time, the chassis 2 and the floating plate 3 have an angular deflection, wherein the spring 63 of part of the elastic limiter 6 is in a compressed state, when the chassis 2 and the floating plate 3 have an angular deflection, it means that the relative distance between the chassis 2 and the floating plate 3 has changed, at this time, the proximity switch 5 on the floating plate 3 detects the distance change, and converts the change signal into an electrical signal and transmits it to the CNC control center of the CNC cutting machine, the CNC control center immediately responds, makes the action of "the CNC mobile end connected to the mounting frame 1 stops moving", and sends out an audible and visual alarm, calling the maintenance personnel for troubleshooting, after the maintenance personnel receive the alarm, the maintenance personnel perform troubleshooting operations: the "collision" laser cutting head 8 and the workpiece are reasonably separated; at this time, under the elongation elastic force of the spring 63, the chassis 2 and the floating plate 3 are pressed together to reset the chassis 2 and the floating plate 3, and then the maintenance personnel check the procedures and operation problems to eliminate the cause of the accident.

[0033] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A cutting head anti-collision device for a CNC cutting machine, comprising: A chassis (2), a floating plate (3), and a throat clamp (4); the characteristics are as follows: the chassis (2) and the floating plate (3) are both circular metal plate structures, the chassis (2) is vertically fixed on a mounting frame (1) of a flat plate structure, the mounting frame (1) is provided with mounting holes, a throat clamp (4) for clamping a laser cutting head (8) is embedded in the floating plate (3), the chassis (2) and the floating plate (3) are floatingly connected through an elastic limiter (6), the chassis (2) and the floating plate (3) can be separated from each other, and can be reset through the elastic limiter (6) in the absence of external force, the floating plate (3) is provided with at least two groups of embedded through holes, each group of embedded through holes is embedded with a proximity switch (5) for monitoring the relative displacement distance between the chassis (2) and the floating plate (3), and there is no obstruction between the sensing end of the proximity switch (5) and the upper surface of the chassis (2).

2. The cutting head anti-collision device for a CNC cutting machine according to claim 1, characterized in that: The elastic stopper (6) comprises: a bolt cap (61), a screw rod (62), a spring (63), a cap nut (64), and a washer (65); the chassis (2) is provided with at least three groups of countersunk holes (21), and an elastic stopper (6) is fixed in each group of countersunk holes (21); the main body of the elastic stopper (6) is a screw rod (62), and the screw rod (62) penetrates the countersunk holes (21) and the floating plate (3), and is fixed on the floating plate (3). A cap nut (64) is fixed to the upper thread, a bolt cap (61) is provided at the lower end of the screw rod (62), a washer (65) is fixed at the transition position between the countersunk hole bottom and the through hole of the countersunk hole (21), a spring (63) is provided between the washer (65) and the bolt cap (61) and is externally embedded on the screw rod (62), the spring (63) has an elastic force tendency to stretch, and under the elastic force of the spring (63), the bottom plate (2) and the floating plate (3) are pressed together.

3. The cutting head anti-collision device for a CNC cutting machine according to claim 1, characterized in that: The main body of the throat clamp (4) is a cylindrical pipe sleeve (41) with a vertical opening. The inner pipe wall of the pipe sleeve (41) is provided with spoke teeth (42) distributed in a circumferential array. Two sides of the vertical opening of the pipe sleeve (41) are respectively provided with a parallel strip plate to form a bolt strip plate (43). The number of the clamping bolts (44) is at least one group. The clamping bolts (44) penetrate one of the bolt strip plates (43) and then cooperate with the other bolt strip plate (43) through a thread.

4. The cutting head anti-collision device for a CNC cutting machine according to claim 3, characterized in that: The outer tube wall of the tube sleeve (41) is provided with vertical concave or convex patterns to form anti-rotation vertical patterns (46), and the embedded position of the floating plate (3) embedded in the throat clamp (4) is provided with an embedded groove or an embedded strip matching the anti-rotation vertical patterns (46).

5. The cutting head anti-collision device for a CNC cutting machine according to claim 1, characterized in that: The outer wall of the floating plate (3) is provided with a threaded hole, the inner thread of the threaded hole is matched with a fixing bolt (7), the fixing bolt (7) is provided with a tooth bar or a rotating wheel for convenient manual tightening, and the inner end of the fixing bolt (7) is tightly pressed against the outer wall of the pipe sleeve (41).

6. The cutting head anti-collision device for a CNC cutting machine according to claim 3, characterized in that: A buffer pad (45) is provided at the inner end of the spoke tooth (42), and is arranged between the spoke tooth (42) and the laser cutting head (8).

7. The cutting head anti-collision device for a CNC cutting machine according to claim 1, characterized in that: The bottom of the chassis (2) is provided with a reserved activity cavity (22) for the deflection activity of the laser cutting head (8).

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