Thread tapping machine for rivet nuts

Abstract

The application discloses a tapping machine for rivet nut, which comprises a workbench, a rotating disc rotatably installed on the workbench, a tapping mechanism installed on the right side of the rotating disc, a plurality of through holes arranged around the outer side of the rotating disc, a tapping station arranged on the workbench and matched with the tapping mechanism, a vertical through slot arranged on the tapping station, a positioning column arranged in the through slot, the positioning column penetrating through the workbench, a lifting cylinder connected to the bottom of the positioning column, a waste discharge groove connected to one side of the through slot, a waste box connected to the waste discharge groove, and clamping mechanisms arranged on the two sides of the tapping station. The thin-wall part of the rivet nut is positioned from the bottom by the lifting positioning column, and then the nut is clamped, so that the limiting is more accurate and the machining precision is ensured. A lifting stud is arranged at the center of the positioning column, a detection block is arranged on the stud, and before tapping, the tap is first detected in close proximity to the stud, so that the nut and the tap are ensured to be on the same central axis, and the tapping precision is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tapping equipment, in particular to the technical field of nut tapping machine. BACKGROUND

[0002] The pull nut is used in the fastening field of various metal plate, pipe and other manufacturing industries, and is widely used in the assembly of electromechanical and light industry products such as automobiles, aviation, rail, refrigeration, elevators, switches, instruments, furniture and decoration. In the production process of the pull nut, internal threads need to be tapped by a tapping machine. The existing nut tapping machine loads the nuts through the slot on the turntable. When the nut at the slot rotates to the tapping station, the nut is clamped and positioned from the outside by the clamping block, and then tapped by the tapping mechanism. This structure cannot well position the center of the nut when clamping and positioning the nut, cannot guarantee that the center of the nut and the center of the tap are on the same axis, and the tapping precision is not high. SUMMARY

[0003] The purpose of the present application is to solve the problems in the prior art and provide a pull nut tapping machine which can well position the center of the nut and ensure the tapping precision.

[0004] To achieve the above purpose, the present application provides a pull nut tapping machine, which comprises a workbench, a turntable rotatably installed on the workbench, a feeding mechanism connected to the turntable, a tapping mechanism installed on the right side of the turntable, a feeding hole formed in the front side of the workbench, a plurality of through holes arranged around the outer side of the turntable, a tapping station provided on the workbench at a position matched with the tapping mechanism, a vertical through slot formed at the tapping station, a positioning column provided in the through slot, the positioning column penetrating through the workbench, a lifting cylinder connected to the bottom of the positioning column, a waste slot connected to one side of the through slot, a waste box connected to the waste slot, and a clamping mechanism provided on both sides of the tapping station.

[0005] Preferably, a positioning ring is installed in the through hole, an annular clamping groove is arranged in the through hole, an annular protrusion matched with the annular clamping groove is arranged on the outer side of the positioning ring, a positioning hole is arranged at the center of the positioning ring, and the positioning hole is a tapered hole with a large upper part and a small lower part.

[0006] Preferably, a positioning ring is installed in the through hole, an annular clamping groove is arranged in the through hole, an annular protrusion matched with the annular clamping groove is arranged on the outer side of the positioning ring, a positioning hole is arranged at the center of the positioning ring, and the positioning hole is a tapered hole with a large upper part and a small lower part.

[0007] Preferably, a through hole is arranged at the center of the positioning column, a threaded sleeve is arranged at the bottom of the through hole, the bottom of the threaded sleeve is rotatably arranged on the bottom surface of the positioning column, a threaded stud is threadedly arranged on the inner wall of the threaded sleeve, the threaded stud is arranged in the through hole, a driving ring is arranged on the lower side of the positioning column, the driving ring is connected with the lifting cylinder, and a rotating motor is connected with the threaded sleeve.

[0008] Preferably, the tapping mechanism comprises an adjusting base, a lifting slide rail is arranged on the adjusting base, a moving plate is slidingly arranged on the lifting slide rail, a tapping motor is arranged on the moving plate, and a tap is arranged at the output end of the tapping motor.

[0009] Preferably, a detection groove is arranged at the bottom end surface of the tap, a proximity switch is arranged at the top of the detection groove, a containing groove is arranged at the top of the threaded stud, and a detection block is connected with the containing groove through a spring.

[0010] Preferably, a magnet is arranged at the bottom of the detection block, and an electromagnet is inlaid at the bottom of the containing groove.

[0011] Preferably, the depth of the containing groove is greater than the height of the detection block, the outer diameter of the detection groove is greater than the outer diameter of the detection block, and the height of the detection groove is greater than the height of the detection block.

[0012] Preferably, the adjusting base is a cross-shaped sliding table.

[0013] Preferably, the feeding mechanism comprises a vertical linear feeding track and a feeding table, the outlet of the feeding table is arranged at the positioning hole of the rotating disc, a feeding block is arranged on the feeding table, and a feeding cylinder is connected with the feeding block.

[0014] The present application has the following advantages: the thin-wall part of the rivet nut is positioned from the bottom by the lifting positioning column, and the nut is clamped, so that the positioning is more accurate, the machining precision is ensured, the thin-wall part can be supported by the positioning column, the strength of the nut is improved, and the nut is prevented from being deformed during machining; the center of the positioning column is provided with a lifting threaded stud, the threaded stud is provided with a detection block, before tapping, the tap is first detected close to the threaded stud, the proximity switch senses that the detection block is close, which indicates that the positioning is accurate, the tapping work is started, the nut and the tap are ensured to be on the same central axis, and the tapping precision is improved; after tapping is completed, the positioning column is lowered, the through groove is communicated with the waste groove, and the waste and the cooling liquid are discharged.

[0015] The features and advantages of the present application will be described in detail in conjunction with the embodiments and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the present application;

[0017] Figure 2 is a top view schematic diagram of the present application;

[0018] Figure 3 is the workbench schematic diagram of the present application;

[0019] Figure 4 is the rotating disc schematic diagram of the present application;

[0020] Figure 5 is the clamping mechanism schematic diagram of the present application;

[0021] Figure 6 the detection schematic diagram of the present application;

[0022] Figure 7 is the A partial enlarged schematic diagram of Figure 6

[0023] Figure 8 is the tapping state schematic diagram of the present application;

[0024] Figure 9 is the positioning column structure schematic diagram of the present application.

[0025] In the figure: 1-workbench, 2-rotating disc, 3-tapping mechanism, 4-positioning column, 5-clamping mechanism, 6-waste box, 7-straight line feeding track, 8-feeding table, 11-blanking hole, 12-through slot, 13-waste discharge slot, 15-sliding groove, 21-through hole, 22-positioning ring, 23-positioning hole, 31-adjusting base, 32-lifting sliding rail, 33-moving plate, 34-tapping motor, 35-tap, 351-detection groove, 40-through hole, 41-lifting air cylinder, 42-inner thread sleeve, 43-stud, 431-containing groove, 432-spring, 433-detection block, 434-electromagnet, 44-driving ring, 45-rotating motor, 51-clamping plate, 52-sliding block, 53-clamping air cylinder, 81-feeding block, 82-feeding air cylinder. DETAILED DESCRIPTION

[0026] Example 1:

[0027] ​The utility model relates to a tapping machine for rivet nut, including workbench 1, workbench 1 is installed with carousel 2 rotationally, carousel 2 is connected with feeding mechanism, the right side of carousel 2 is installed with tapping mechanism 3, and the front side of workbench 1 is seted up with blanking hole 11, and the outside of carousel 2 is seted up with 8 through -holes 21, and the position of workbench 1 is seted up with tapping station with tapping mechanism 3 is matched, and the tapping station is seted up with vertical through -groove 12, and through -groove 12 is equipped with positioning column 4, positioning column 4 is set through workbench 1, and the bottom of positioning column 4 is connected with lift cylinder 41, and one side of through -groove 12 is connected with waste slot 13, and waste slot 13 is connected with waste box 6, and the both sides of tapping station are equipped with clamping mechanism 5, the through -hole 21 is installed with positioning ring 22, the through -hole 21 is equipped with annular clamping groove, the outside of positioning ring 22 is equipped with annular protrusion with annular clamping groove is matched, and the center of positioning ring 22 is equipped with positioning hole 23.

[0028] Example 2:

[0029] Reference Figures 1 to 9The utility model provides a kind of pull rivet nut tapping machine, including workbench 1, workbench 1 is rotatably installed with carousel 2, carousel 2 is connected with feeding mechanism, the right side of carousel 2 is installed with tapping mechanism 3, the front side of workbench 1 is equipped with blanking hole 11, the outside of carousel 2 is equipped with 8 through holes 21, the position of workbench 1 with tapping mechanism 3 is equipped with tapping station, tapping station is equipped with vertical through slot 12, through slot 12 is equipped with positioning column 4, positioning column 4 is arranged through workbench 1, the bottom of positioning column 4 is connected with lifting cylinder 41, one side of through slot 12 is connected with waste slot 13, waste slot 13 is connected with waste box 6, the both sides of tapping station are equipped with clamping mechanism 5, the inside of through hole 21 is installed with positioning ring 22, the inside of through hole 21 is equipped with annular clamping groove, the outside of positioning ring 22 is equipped with annular protrusion matched with annular clamping groove, the center of positioning ring 22 is equipped with positioning hole 23, positioning hole 23 is big down small taper hole, the clamping mechanism 5 includes clamping plate 51 symmetrically arranged in the both sides of tapping station, the side of clamping plate 51 close to tapping station is equipped with V-shaped groove, V-shaped groove is equipped with rubber pad, workbench 1 is equipped with sliding slot 15, the bottom of clamping plate 51 is equipped with sliding block 52, sliding block 52 is slidably arranged in sliding slot 15, sliding block 52 is connected with clamping cylinder 53, the center of positioning column 4 is equipped with through hole 40, the bottom of through hole 40 is equipped with internal thread sleeve 42, the bottom of internal thread sleeve 42 is rotatably installed on the bottom surface of positioning column 4, the inner wall of internal thread sleeve 42 is threadedly installed with stud 43, stud 43 is arranged in through hole 40, the downside of positioning column 4 is installed with driving ring 44, driving ring 44 is connected with lifting cylinder 41, internal thread sleeve 42 is connected with rotating motor 45.The top of positioning column is equipped with taper head, and the positioning column and the pull rivet nut hole of the bottom of the nut are positioned and installed conveniently, the tapping mechanism 3 includes adjusting base 31, adjusting base 31 is installed with lifting slide rail 32, lifting slide rail 32 is slidably installed with moving plate 33, moving plate 33 is installed with tapping motor 34, the output end of tapping motor 34 is installed with tap 35, the bottom end surface of tap 35 is equipped with detection groove 351, the top of detection groove 351 is equipped with proximity switch, the top of tap 35 is equipped with accommodating groove 431, accommodating groove 431 is connected with detection block 433 by spring 432, the bottom of detection block 433 is equipped with magnet, the bottom of accommodating groove 431 is inlaid with electromagnet 434, the depth of accommodating groove 431 is greater than the height of detection block 433, the outer diameter of detection groove 351 is greater than the outer diameter of detection block 433, the height of detection groove 351 is greater than the height of detection block 433, the adjusting base 31 is cross-shaped slide, the feeding mechanism includes vertically arranged straight line feeding track 7 and feeding table 8, the outlet of feeding table 8 is arranged at the positioning hole 23 of carousel 2, feeding table 8 is provided with feeding block 81, feeding block 81 is connected with feeding cylinder 82.

[0030] The working process of the utility model:

[0031] The present application controls the working process through the PLC controller, when the positioning column 4 is in standby state, the upper surface of the positioning column 4 is flush with the surface of the workbench 1, the top of the stud 43 is flush with the top of the positioning column 4, the electromagnet 434 is energized, and the detection block 433 is located in the accommodating groove 431, which does not affect the conveying of the nut by the turntable 2. When tapping, the feeding mechanism pushes the nut to the positioning hole 23, the rivet nut falls into the positioning hole 23, the turntable 2 rotates the nut to the tapping station, then the positioning column 4 rises, the positioning column 4 is clamped into the pull rivet through hole at the bottom of the nut, and the nut is positioned, the top of the positioning column 4 is reserved a certain distance from the threaded hole to be processed, after positioning, the clamping mechanism clamps the nut from the outside, the bottom of the clamping plate 51 is located above the rivet nut bottom plate, after clamping, the electromagnet is de-energized, the detection block 433 protrudes from the top of the stud 43, then the stud 43 rises until the top of the stud 43 protrudes from the top of the nut, and the tap 35 descends to be close to the stud 43, and a test action is performed, if the positioning is accurate, the detection block 433 will enter the detection groove 351, and the proximity switch senses the proximity of the detection block, and sends a positioning pass signal, and the tapping work continues, if the positioning is not accurate, the proximity switch cannot sense the detection block, a positioning fail signal is sent, the tapping work is paused, and the worker is informed to debug, and the worker can adjust the tapping position of the tap by adjusting the base.

[0032] After positioning, the stud 43 descends to the standby position and is flush with the positioning column 4, the tap continues to descend to tap the nut, when tapping to below the threaded hole, the detection block 433 enters the detection groove 351 again, triggers the proximity switch, and sends a tapping completion signal, and the tap is withdrawn.

[0033] After tapping is completed, the positioning column 4 descends to below the through groove 12, so that the through groove 12 communicates with the waste groove 13, the cooling liquid flushes the inner hole of the nut, the waste liquid is discharged into the waste tank, after flushing is completed, the positioning column 4 returns to the standby position, and the turntable 2 transfers the processed nut to the discharge hole 11, and the nut is discharged from the discharge hole 11.

[0034] The above examples are illustrative of the present application and are not limiting of the present application, and any simple transformation of the present application also belongs to the protection scope of the present application.

Claims

1. A tapping machine for blind rivet nuts, characterized in that: The utility model provides a tumbler tapping mechanism, including workbench (1), workbench (1) is rotatably installed with tumbler (2), tumbler (2) is connected with feeding mechanism, tumbler (2) right side is installed with tapping mechanism (3), and the front side of workbench (1) is provided with blanking hole (11), and the outside of tumbler (2) is provided with a plurality of through -hole (21), and the position of workbench (1) is provided with tapping station with tapping mechanism (3) is matched, and tapping station is provided with vertical through -groove (12), and through -groove (12) is equipped with the positioning column (4), positioning column (4) is set through workbench (1), and the bottom of positioning column (4) is connected with lift cylinder (41), and one side of through -groove (12) is connected with waste slot (13), and waste slot (13) is connected with waste box (6), and the both sides of tapping station are equipped with clamping mechanism (5);The positioning ring (22) is installed in the through -hole (21), the annular clamping groove is equipped in the through -hole (21), the outer side of positioning ring (22) is equipped with the annular protruding of annular clamping groove is matched, the center of positioning ring (22) is equipped with the positioning hole (23);The center of positioning column (4) is equipped with the through -hole (40), and the bottom of through -hole (40) is equipped with the internal thread sleeve (42), and the bottom of internal thread sleeve (42) is rotatably installed on the bottom surface of positioning column (4), and the inner wall of internal thread sleeve (42) is screw mounted with stud (43), and stud (43) is arranged in through -hole (40), and the downside of positioning column (4) is installed with drive ring (44), and drive ring (44) is connected with lift cylinder (41), and internal thread sleeve (42) is connected with rotation motor (45);The tapping mechanism (3) includes adjusting base (31), and adjusting base (31) is installed with lift slide rail (32), and lift slide rail (32) is slidably installed with moving plate (33), and moving plate (33) is installed with tapping motor (34), and the output end of tapping motor (34) is installed with tap (35);The bottom end surface of tap (35) is provided with detection groove (351), and the top of detection groove (351) is equipped with proximity switch, and the top of stud (43) is provided with containing groove (431), and containing groove (431) is connected with detection block (433) through spring (432) in the inside, and the bottom of detection block (433) is equipped with magnet, and the bottom of containing groove (431) is embedded with electromagnet (434);When tapping, the feeding mechanism pushes the nut to the positioning hole (23), the rivet nut falls into the positioning hole (23), the rotating disc (2) rotates the nut to the tapping station, then the positioning column (4) rises, the positioning column (4) is clamped into the rivet through hole at the bottom of the nut, the nut is positioned, the top of the positioning column (4) is reserved a certain distance from the threaded hole to be processed, after positioning, the clamping mechanism (5) clamps the nut from the outside, the bottom of the clamping plate (51) is above the rivet nut bottom plate, after clamping, the electromagnet (434) is de-energized, the detection block (433) protrudes from the top of the stud (43), then the stud (43) rises until it protrudes from the top of the nut, at the same time the tap (35) descends close to the stud (43), performs a test action, if the positioning is accurate, the detection block (433) will enter the detection groove (351), the proximity switch senses the proximity of the detection block (433), sends a positioning pass signal, and continues tapping work, if the positioning is not accurate, the proximity switch cannot sense the detection block (433), sends a positioning fail signal; after positioning, the stud (43) descends to the standby position, flush with the positioning column (4), the tap (35) continues to descend to tap the nut, when tapping to the bottom of the threaded hole, the detection block (433) enters the detection groove (351) again, triggers the proximity switch, and sends a tapping completion signal.

2. The riv-nut tapping machine according to claim 1, characterized in that: The clamping mechanism (5) comprises clamping plates (51) symmetrically arranged on both sides of the tapping station, the side close to the tapping station of the clamping plate (51) is provided with a V-shaped groove, a rubber pad is arranged in the V-shaped groove, a sliding groove (15) is formed on the workbench (1), the bottom of the clamping plate (51) is provided with a sliding block (52), the sliding block (52) is slidingly arranged in the sliding groove (15), and the sliding block (52) is connected with a clamping cylinder (53).

3. The riv-nut tapping machine according to claim 1, characterized in that: The depth of the accommodating groove (431) is greater than the height of the detection block (433), the outer diameter of the detection groove (351) is greater than the outer diameter of the detection block (433), and the height of the detection groove (351) is greater than the height of the detection block (433).

4. The riv-nut tapping machine of claim 1, wherein: The adjusting base (31) is a cross-shaped sliding table.

5. The riv-nut tapping machine of claim 1, wherein: The feeding mechanism comprises a vertical linear feeding track (7) and a feeding table (8), the outlet of the feeding table (8) is arranged at the positioning hole (23) of the rotating disc (2), the feeding table (8) is provided with a feeding block (81), and the feeding block (81) is connected with a feeding cylinder (82).

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