High-precision multi-station automatic tapping machine tool

Abstract

The invention relates to the technical field of metal tapping, in particular to a high-precision multi-station automatic tapping machine tool which comprises a self-adaptive clamping mechanism, a quick discharging mechanism, a shifting mechanism and an adjustable tapping mechanism. The self-adaptive clamping mechanism comprises a bed body, a limiting clamp, a fixing plate, a compression spring and a limiting clamp. A sliding rail is arranged on the limiting clamp, the sliding rail is installed in a round hole in the fixing plate in a sliding mode, a compression spring is further installed on the sliding rail, one end of the compression spring makes contact with the limiting clamp, and the other end of the compression spring makes contact with the fixing plate; when the clamping mechanism is used, the clamping mechanism carries out clamping through pre-tightening force generated by the action of the compression springs with the same force, the workpiece can be tightly fixed only by pushing the workpiece to the position between the two limiting clamps and compressing the compression springs, the structure is simple, adaptability is high, and workpieces of different sizes can be clamped without setting clamping parameters.

Description

Technical Field

[0001] The invention relates to the technical field of metal tapping, in particular to a high-precision multi-station automatic tapping machine tool. Background Art

[0002] With the rapid development of the manufacturing industry, the requirements for mechanical processing equipment are getting higher and higher; traditional manual or semi-automatic tapping machines can no longer meet the high efficiency, precision and stability requirements of modern production; therefore, high-precision multi-station automatic tapping machines came into being and became the key equipment to solve this problem.

[0003] High-precision multi-station automatic tapping machines are widely used in automotive parts processing, machinery manufacturing, electronics, aerospace and other fields; for example, in the automotive manufacturing industry, the machine tool can be used for tapping of engines, gearboxes, chassis and other parts; in the aerospace industry, the machine tool can be used for aircraft parts, rocket parts and other processing tasks with high precision and high reliability requirements.

[0004] The loading and unloading mechanism of the existing tapping machine is driven by multiple groups of multi-action connecting rods, which has complicated action steps and many power sources, resulting in unnecessary cost waste; and the tapping head of the existing tapping machine is usually fixed, and can only adjust the position of the workpiece or replace the tapping drill bit, which is relatively cumbersome, and the overall device occupies a large space. Summary of the invention

[0005] In view of the above technical problems, the present invention discloses a high-precision multi-station automatic tapping machine, which can effectively solve the problems in the background technology. When the present invention is in use, the clamping mechanism is clamped by the pre-tightening force generated by the action of compression springs of equal force. It only needs to push the workpiece between the two limit clamps to compress the compression spring to tightly fix the workpiece. It has a simple structure and strong adaptability. It does not need to set clamping parameters to clamp workpieces of different sizes. The loading and unloading of the present invention are both performed by moving the rack rod to complete the loading and unloading of the workpiece, which is very convenient and fast. When loading, there is no need to place the workpiece accurately, but only need to place it in an approximate position. The workpiece can be automatically limited by pushing the frame top to the limit clamp. When unloading, the movable plate can be directly opened and slid from the movable plate to the unloading plate, which greatly saves space. The tapping mechanism of the present invention can adjust the horizontal position, so that any position of the workpiece can be tapped.

[0006] A high-precision multi-station automatic tapping machine tool comprises: an adaptive clamping mechanism, a rapid feeding mechanism, a toggle mechanism, and an adjustable tapping mechanism; the adaptive clamping mechanism comprises: a bed, a limit clamp, a fixed plate, a compression spring, and a limit card; the limit clamp is provided with a slide rail, the slide rail is slidably installed in a round hole on the fixed plate, and a compression spring is also installed on the slide rail, one end of the compression spring contacts the limit clamp, and the other end of the compression spring contacts the fixed plate, and the compression spring generates elastic force; the limit card is fixedly installed at the edge of the bed.

[0007] Preferably, the rapid unloading mechanism includes: a movable plate, an unloading plate, a worm, a stepper motor I, and a worm wheel; the short shafts on both sides of the movable plate are rotatably mounted in the circular holes at the opening on the bed, and worm wheels are fixedly mounted on the short shafts on both sides of the movable plate, the worm wheels are meshed with the worm, and both ends of the worm are rotatably mounted in the circular holes of the extension frame on the bed, one end of the worm is also connected to the motor shaft of the stepper motor I, and the stepper motor I is fixedly mounted on the extension frame on the bed; the unloading plate is fixedly mounted on the support legs under the bed and is located below the movable plate.

[0008] Preferably, the toggle mechanism includes: a crossbeam, a rack rod, a toggle frame, a cylinder, a transmission shaft, a gear I, and a stepper motor II; the crossbeam is fixedly mounted on the bed, the rack rod is provided with three groups, all of which are slidably mounted in the grooves on the crossbeam, the toggle frame is slidably mounted in the circular hole on the upper side of the rack rod, the upper end of the toggle frame is fixedly connected to the piston rod of the cylinder, and the cylinder body of the cylinder is fixedly mounted on the extension frame on the rack rod; both ends of the transmission shaft are rotatably mounted in the circular holes of the extension frame on the crossbeam, a gear I is fixedly mounted on the transmission shaft, the gear I is meshed with the teeth on the rack rod, one end of the transmission shaft is also connected to the motor shaft of the stepper motor II, and the stepper motor II is fixedly mounted on the extension frame on the crossbeam.

[0009] Preferably, the adjustable tapping mechanism includes: a support frame, a swing arm, a gear II, a stepper motor III, a tapping module, a screw, and a stepper motor IV; the support frame is fixedly installed under the bed, the rotating shaft on the swing arm is rotatably installed in a circular hole on the support frame, and a gear II is also fixedly installed on the rotating shaft, and the gear II is meshed with the motor gear of the stepper motor III, and the stepper motor III is fixedly installed on the extension plate on the support frame; the tapping module is slidably installed on the swing arm, the screw is threadedly connected to the tapping module, both ends of the screw are rotatably installed in the circular hole on the swing arm, one end of the screw is also connected to the motor shaft of the stepper motor IV, and the stepper motor IV is fixedly installed on the swing arm.

[0010] Preferably, the shape of the feed portion of the limit clamp is outwardly extending.

[0011] Preferably, the teeth on the rack rod are retracted inwardly and embedded in the rack rod.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. When the present invention is in use, the clamping mechanism is clamped by the pre-tightening force generated by the action of the compression spring of equal force. It is only necessary to push the workpiece between the two limit clamps, and the compression spring can tightly fix the workpiece. It has a simple structure and strong adaptability. It is possible to clamp workpieces of different sizes without setting the clamping parameters. 2. The loading and unloading of the present invention are both performed by moving the rack rod to complete the loading and unloading of the workpiece, which is very convenient and quick. Moreover, when loading, there is no need to place the workpiece precisely, but only to place it in an approximate position. By moving the top of the frame to the limit clamp, it will automatically limit the position. When unloading, the movable plate can be directly opened and slid from the movable plate to the unloading plate, which greatly saves space. 3. The tapping mechanism of the present invention can adjust the horizontal position, so that any position of the workpiece can be tapped. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an isometric view of the overall structure of the present invention.

[0014] Figure 2 It is a side view of the overall structure of the present invention.

[0015] Figure 3 This is a first viewing angle diagram of the adaptive clamping mechanism of the present invention.

[0016] Figure 4 This is a second viewing angle diagram of the adaptive clamping mechanism of the present invention.

[0017] Figure 5 For the present invention Figure 3 Enlarged view of point A in the middle.

[0018] Figure 6 It is a structural diagram of the toggle mechanism of the present invention.

[0019] Figure 7 It is a single group structural diagram of the toggle mechanism of the present invention.

[0020] Figure 8 This is a first viewing angle diagram of the adjustable tapping mechanism of the present invention.

[0021] Figure 9 This is a second viewing angle diagram of the adjustable tapping mechanism of the present invention.

[0022] Description of the Drawings: 1. Bed body; 2. Limit clamp; 3. Fixed plate; 4. Compression spring; 5. Limit card; 6. Movable plate; 7. Blank discharging plate; 8. Worm; 9. Stepper motor I; 10. Worm gear; 11. Cross beam; 12. Rack bar; 13. Dialing frame; 14. Cylinder; 15. Transmission shaft; 16. Gear I; 17. Stepper motor II; 18. Support frame; 19. Swing arm; 20. Gear II; 21. Stepper motor III; 22. Thread tapping module; 23. Lead screw; 24. Stepper motor IV. Detailed implementation mode

[0023] The technical solution of the present invention will be further specifically described below through embodiments in conjunction with the drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementations disclosed below.

[0024] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of simplifying the description of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, in order to facilitate the description, spatial relative terms can be used in the text, for example, "below", "beneath", "under", "above", "over", etc., to describe the relationship of one element or feature relative to other elements or features as shown in the drawings. The spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation shown in the drawings. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatial relative descriptive terms used in the text can be similarly interpreted accordingly.

[0025] For example, in the embodiment Figures 1 - 9 As shown, a high-precision multi-station automatic tapping machine tool includes: an adaptive clamping mechanism, a rapid blank discharging mechanism, a dialing mechanism, and an adjustable tapping mechanism; In an optional implementation manner of the embodiment of the present invention, as Figure 3 , Figure 5As shown, the adaptive clamping mechanism includes: a bed body 1, a limit clamp 2, a fixed plate 3, a compression spring 4, and a limit card 5; the limit clamp 2 is provided with a slide rail, the slide rail is slidably installed in a circular hole on the fixed plate 3, and a compression spring 4 is also installed on the slide rail, one end of the compression spring 4 is in contact with the limit clamp 2, and the other end of the compression spring 4 is in contact with the fixed plate 3, and the compression spring 4 generates an elastic force; the limit card 5 is fixedly installed at the edge position of the bed body 1.

[0026] In an optional implementation manner of the embodiment of the present invention, as Figure 3 , Figure 6 As shown, the quick unloading mechanism includes: a movable plate 6, an unloading plate 7, a worm 8, a stepper motor Ⅰ9, and a worm wheel 10; the short shafts on both sides of the movable plate 6 are rotatably mounted in the circular holes at the opening on the bed 1, and the worm wheels 10 are fixedly mounted on the short shafts on both sides of the movable plate 6, and the worm wheels 10 are meshed with the worm 8. Both ends of the worm 8 are rotatably mounted in the circular holes of the extension frame on the bed 1, and one end of the worm 8 is also connected to the motor shaft of the stepper motor Ⅰ9, and the stepper motor Ⅰ9 is fixedly mounted on the extension frame on the bed 1; the unloading plate 7 is fixedly mounted on the support legs at the bottom of the bed 1 and is located below the movable plate 6.

[0027] In an optional implementation manner of the embodiment of the present invention, as Figure 6 , Figure 7 As shown, the toggle mechanism includes: a crossbeam 11, a rack rod 12, a toggle frame 13, a cylinder 14, a transmission shaft 15, a gear I 16, and a stepper motor II 17; the crossbeam 11 is fixedly mounted on the bed 1, the rack rod 12 is provided with three groups, all of which are slidably mounted in the notches on the crossbeam 11, the toggle frame 13 is slidably mounted in the circular hole on the upper side of the rack rod 12, the upper end of the toggle frame 13 is fixedly connected to the piston rod of the cylinder 14, and the cylinder body of the cylinder 14 is fixedly mounted on the extension frame on the rack rod 12; both ends of the transmission shaft 15 are rotatably mounted in the circular holes of the extension frame on the crossbeam 11, a gear I 16 is fixedly mounted on the transmission shaft 15, the gear I 16 is meshed with the teeth on the rack rod 12, one end of the transmission shaft 15 is also connected to the motor shaft of the stepper motor II 17, and the stepper motor II 17 is fixedly mounted on the extension frame on the crossbeam 11.

[0028] In an optional implementation manner of the embodiment of the present invention, as Figure 8 , Figure 9As shown, the adjustable tapping mechanism includes: a support frame 18, a swing arm 19, a gear II 20, a stepper motor III 21, a tapping module 22, a screw 23, and a stepper motor IV 24; the support frame 18 is fixedly installed under the bed 1, and the rotating shaft on the swing arm 19 is rotatably installed in the circular hole on the support frame 18, and the gear II 20 is also fixedly installed on the rotating shaft, and the gear II 20 is meshed with the motor gear of the stepper motor III 21, and the stepper motor III 21 is fixedly installed on the extension plate on the support frame 18; the tapping module 22 is slidably installed on the swing arm 19, the screw 23 is threadedly connected to the tapping module 22, and both ends of the screw 23 are rotatably installed in the circular hole on the swing arm 19, one end of the screw 23 is also connected to the motor shaft of the stepper motor IV 24, and the stepper motor IV 24 is fixedly installed on the swing arm 19.

[0029] In an optional implementation manner of the embodiment of the present invention, as Figure 3 , Figure 4 As shown, the shape of the feed portion of the limiting clamp 2 is outwardly extended.

[0030] In an optional implementation manner of the embodiment of the present invention, as Figure 7 As shown, the teeth on the rack rod 12 are retracted inwardly and embedded in the rack rod 12 .

[0031] Working principle: When the present invention is in use, first place the workpiece to be processed on the movable plate 6, corresponding to the approximate position of the entrance of the limit clamp 2, then start the stepper motor II 17, drive the transmission shaft 15 to rotate, thereby driving the rack rod 12 to slide inward through the gear I 16, and at the same time start the cylinder 14, drive the toggle frame 13 to slide downward, so that the toggle frame 13 extends downward, the toggle frame 13 will clamp the workpiece, and push the workpiece to the entrance of the limit clamp 2. With continuous pushing, the workpiece will open the limit clamp 2, compress the compression spring 4, so that the workpiece is stuck in the limit clamp 2, and finally the limit card 5 performs the end limit, completing the placement of the workpiece, and then the rack rod 12 is reset.

[0032] Subsequently, different workpieces are tapped at different positions according to different workstations, and the position of the tapping module 22 is adjusted. Specifically, the stepper motor III 21 is started to drive the gear II 20 to rotate, thereby driving the swing arm 19 to rotate. At the same time, the stepper motor IV 24 is started to drive the screw rod 23 to rotate, thereby driving the tapping module 22 to slide. Through the rotation of the swing arm 19 and the sliding of the tapping module 22, the position of the tapping module 22 can be stopped at any position on the upper surface of the workpiece, and then tapping is performed.

[0033] After tapping is completed, the rack bar 12 moves to the workpiece again. This time, the toggle bracket 13 catches on the other end of the workpiece. Subsequently, the rack bar 12 is driven to reset, pulling the workpiece out of the working station. Then, the stepping motor I 9 is started, driving the worm 8 to rotate, thereby driving the worm gear 10 to rotate, so that the movable plate 6 unfolds downward, and the workpiece slides off the movable plate 6 and slides onto the blanking plate 7 for collection.

[0034] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision multi-station automatic tapping machine tool, characterized in that: include: An adaptive clamping mechanism, a quick feeding mechanism, a toggle mechanism, and an adjustable tapping mechanism; the adaptive clamping mechanism comprises: a bed (1), a limit clamp (2), a fixed plate (3), a compression spring (4), and a limit card (5); the limit clamp (2) is provided with a slide rail, the slide rail is slidably installed in a round hole on the fixed plate (3), and a compression spring (4) is also installed on the slide rail, one end of the compression spring (4) contacts the limit clamp (2), and the other end of the compression spring (4) contacts the fixed plate (3), and the compression spring (4) generates elastic force; the limit card (5) is fixedly installed at the edge position of the bed (1).

2. A high-precision multi-station automatic tapping machine tool according to claim 1, characterized in that: The rapid unloading mechanism comprises: a movable plate (6), an unloading plate (7), a worm (8), a stepper motor I (9), and a worm wheel (10); the short shafts on both sides of the movable plate (6) are rotatably mounted in the circular holes at the opening of the bed body (1); the worm wheels (10) are fixedly mounted on the short shafts on both sides of the movable plate (6); the worm wheels (10) are meshed with the worm (8); the two ends of the worm (8) are rotatably mounted in the circular holes of the extension frame on the bed body (1); one end of the worm (8) is also connected to the motor shaft of the stepper motor I (9); the stepper motor I (9) is fixedly mounted on the extension frame on the bed body (1); the unloading plate (7) is fixedly mounted on the support legs at the bottom of the bed body (1) and is located below the movable plate (6).

3. A high-precision multi-station automatic tapping machine tool according to claim 2, characterized in that: The toggle mechanism comprises: a crossbeam (11), a rack rod (12), a toggle frame (13), a cylinder (14), a transmission shaft (15), a gear I (16), and a stepping motor II (17); the crossbeam (11) is fixedly mounted on the bed (1), the rack rod (12) is provided with three groups, all of which are slidably mounted in the notches on the crossbeam (11), the toggle frame (13) is slidably mounted in the circular hole on the upper side of the rack rod (12), and the upper end of the toggle frame (13) is connected to the piston of the cylinder (14). The cylinder (14) is fixedly connected to the rack rod (12); the cylinder body of the cylinder (14) is fixedly mounted on the extension frame on the rack rod (12); the two ends of the transmission shaft (15) are rotatably mounted in the circular holes of the extension frame on the crossbeam (11); a gear I (16) is fixedly mounted on the transmission shaft (15); the gear I (16) is meshed with the teeth on the rack rod (12); one end of the transmission shaft (15) is also connected to the motor shaft of the stepper motor II (17); the stepper motor II (17) is fixedly mounted on the extension frame on the crossbeam (11).

4. A high-precision multi-station automatic tapping machine tool according to claim 3, characterized in that: The adjustable tapping mechanism comprises: a support frame (18), a swing arm (19), a gear II (20), a stepping motor III (21), a tapping module (22), a screw rod (23), and a stepping motor IV (24); the support frame (18) is fixedly mounted below the bed (1); a rotating shaft on the swing arm (19) is rotatably mounted in a circular hole on the support frame (18); a gear II (20) is also fixedly mounted on the rotating shaft; the gear II (20) and the stepping motor III (21) are connected to each other. ), the stepper motor III (21) is fixedly mounted on the extension plate on the support frame (18); the tapping module (22) is slidably mounted on the swing arm (19), the screw rod (23) is threadedly connected to the tapping module (22), both ends of the screw rod (23) are rotatably mounted in the circular hole on the swing arm (19), one end of the screw rod (23) is also connected to the motor shaft of the stepper motor IV (24), and the stepper motor IV (24) is fixedly mounted on the swing arm (19).

5. The high-precision multi-station automatic tapping machine tool according to claim 1, characterized in that: The shape of the feed portion of the limiting clamp (2) is outwardly extending.

6. A high-precision multi-station automatic tapping machine tool according to claim 3, characterized in that: The teeth on the rack rod (12) are retracted inwardly and embedded in the rack rod (12).

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