Firework outer cylinder punching and lead inserting device and method

Abstract

The invention discloses a firework outer barrel punching and lead inserting device and method, and relates to the field of firework production equipment. The device comprises a rack, a double-end punching needle, a bent wire inserting and guiding head, a synchronous wheel assembly, a punching needle driving device and an inserting and guiding driving device. One side of the synchronous belt is connected with the punching needle, the other side of the synchronous belt is connected with the lead inserting head, when the lead inserting head moves downwards, the synchronous belt drives the punching needle to move upwards for avoiding, and collision is completely eradicated; in cooperation with a linear guide rail, a sliding groove-rolling wheel drive and a synchronous wheel assembly, punching and lead inserting of firework outer barrels are achieved, and lead damage and multi-barrel continuous machining are prevented. The device solves the problems that in the prior art, gear and rack maintenance cost is high, and multi-barrel machining continuity is poor, has the advantages of being simple in structure, free of damage to the lead, high in efficiency and high in adaptability, and is suitable for automatic production of punching and lead inserting procedures of various firework outer barrels.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fireworks production equipment, and particularly relates to a fireworks outer tube punching and fuse inserting device and method. BACKGROUND

[0002] In the process of producing fireworks, the punching and fuse inserting of the outer tube (commonly known as "cannon tube") of fireworks is a key process for ensuring the safety of products and the effect of ignition. The traditional punch and fuse inserting device for assembling the outer tube of fireworks is driven by a connecting rod or a rack to realize the synchronous and staggered punching and fuse inserting, but the mechanism is complex, the machine body is large in size, and the length adjustment of the fuse is complex.

[0003] For example, in the prior art, a fireworks tube punching and fuse inserting device is disclosed in Chinese Patent Publication No. CN 105486179 A, which realizes the reverse linkage of punching and fuse inserting through "gear-double rack meshing transmission": the gear is meshed with two racks connected with the punching module and the fuse inserting module respectively, when the driving device drives any one rack to move, the gear synchronously drives the other rack in reverse, so that the punching needle and the fuse guide groove move in a staggered manner, thereby avoiding component interference (collision).

[0004] However, the scheme still has the following technical defects in actual application: high maintenance cost of transmission structure, strict precision requirement; limited adaptability of multi-tube processing; insufficient function synchronization, prolonged single cycle time; sliding friction between the rack and the guide block, large movement resistance, and the need to configure a larger power driving cylinder or motor, higher energy consumption than similar devices.

[0005] Therefore, the existing punch and fuse inserting mechanism has complex structure (such as gear and rack type) and high processing and assembly requirements (such as connecting rod linkage type). In view of the problems of high maintenance cost, poor continuity of multi-tube processing, and insufficient function synchronization of the gear-double rack transmission scheme in the prior art, there is an urgent need for a fireworks outer tube punching and fuse inserting device with simpler structure, easier maintenance, and stronger adaptability to further improve the automation level and economy of fireworks production. SUMMARY

[0006] In view of the problems of high maintenance cost, poor continuity of multi-tube processing, insufficient function synchronization, and large movement resistance of the gear-double rack transmission scheme in the prior art, the application provides a fireworks outer tube punching and fuse inserting device and method, which can realize simultaneous punching and fuse inserting of multiple outer tubes, and has simple structure, convenient operation, economy, environmental protection, and reduced production cost.

[0007] In a first aspect, the present application provides a fireworks outer tube punching and inserting device, comprising a frame and a double-head punching needle for punching the fireworks outer tube, the device further comprising: a curved wire inserting head, comprising an inserting head and curved wire heads, the inserting head being slidably arranged between the curved wire heads, and a compression spring and a stop block being arranged between the upper end of the inserting head and the curved wire heads for bending and inserting the fuse into the outer tube hole and preventing the fuse from being damaged by extrusion; a synchronous wheel assembly, comprising a synchronous wheel frame and a synchronous belt wound around the synchronous wheel, one side of the synchronous belt being fixedly connected with a punching needle fixed plate, the punching needle fixed plate being connected with the double-head punching needle, the other side of the synchronous belt being connected with the inserting drive block through a connecting rod; a punching needle drive device, being a punching needle drive cylinder, the punching needle drive cylinder being connected with the synchronous wheel frame, and the synchronous wheel frame being installed on a linear guide rail, the punching needle drive cylinder being capable of driving the synchronous wheel frame to move up and down along the linear guide rail; and an inserting drive device, being an inserting cylinder, the output end of the inserting cylinder being provided with a roller, the inserting drive block being connected with the curved wire inserting head, the inserting drive block being provided with a sliding groove, the roller being slidably embedded in the sliding groove, the inserting cylinder driving the curved wire inserting head to move up and down through the cooperation of the roller and the sliding groove, and the double-head punching needle being driven to move up and down in the opposite direction of the curved wire inserting head through the transmission of the synchronous belt, so as to avoid the interference between the double-head punching needle and the curved wire inserting head.

[0008] The device realizes multiple core technical effects through innovative structural design: first, relying on reverse linkage of the synchronous belt, the interference between the punching needle and the inserting head is completely eliminated, and the operation safety is greatly improved; second, the transmission structure is simplified, the processing and maintenance costs are reduced, and the service life of the equipment is prolonged; third, the linear guide rail and the roller and the sliding groove are cooperatively driven, the motion stability is improved, and the energy consumption is reduced; fourth, the function synchronization is optimized, the processing cycle time is shortened, and the fuse cutting precision is improved; fifth, multiple assemblies are symmetrically arranged, and the continuous processing of the row of tubes can be realized without additional avoiding structure, which adapts to the batch production demand; sixth, the curved wire head stop block can effectively prevent the fuse from being damaged by extrusion during the bending into U-shaped process.

[0009] Preferably, the device further comprises a fuse guide groove limiting block, the curved wire heads and the inserting head being installed in the fuse guide groove limiting block, and the fuse guide groove limiting block being fixedly connected with the frame. The integrated fixed curved wire heads and inserting head guarantee the fuse forming and inserting precision; the single-point connection synchronous belt reduces the stress dispersion and improves the transmission and reverse linkage stability; the modular assembly and maintenance are realized, the assembly efficiency is improved, and the downtime is shortened.

[0010] Preferably, the cutting device is provided as a cutting blade mounted on the frame, the cutting blade is connected with the cutting driving block through a roller, and the cutting driving block can drive the cutting blade to cut the lead wire when it moves downward; the cutting blade is reset by a torsional spring when the cutting driving block moves upward. The cutting blade and the cutting driving block move synchronously, realizing no delay between the cutting and the cutting action, improving the cutting precision (error ≤0.3mm), and completely solving the problem of "cutting short" or "cutting failure" of the fixed blade; no additional driving components are needed, the structure is simplified, and the action coordination is improved.

[0011] Preferably, the automatic retreating device of the blocking piece comprises a blocking piece and a reset spring, the blocking piece is arranged below the bending lead insertion head on the frame, the blocking piece is driven to retreat when the insertion cylinder moves downward to a preset position, and the blocking piece is reset under the action of the reset spring when the insertion cylinder resets. The blocking piece automatically retreats when the lead is inserted, avoiding interference with the insertion of the lead; the blocking piece is automatically reset by the reset spring after the insertion is completed, no additional driving is needed, and the structure is simplified; the continuity of the insertion action is ensured, and the processing cycle efficiency is not affected.

[0012] Preferably, the linear guide rail is fixed on the frame in the vertical direction, the synchronous wheel frame is in sliding fit with the linear guide rail, and the piston rod of the punch driving cylinder extends and retracts in the vertical direction to drive the synchronous wheel frame to move linearly along the linear guide rail. The vertical guidance of the linear guide rail ensures the straightness (error ≤0.1mm / m) of the movement of the synchronous wheel frame, and the vertical driving of the cylinder makes the force transmission more direct and improves the movement stability; the shaking of the synchronous belt transmission is reduced, the reverse linkage precision of the double-head punch pin and the insertion head is ensured, and the risk of interference is further eliminated.

[0013] Preferably, the double-head punch pin is of a solid structure and is provided with sharp punch ends at both ends. The solid structure greatly improves the strength and rigidity of the punch pin, avoids deformation and fracture after long-term use, and prolongs the service life; the sharp punch ends at both ends ensure accurate and smooth punching of the firework outer tube, reduce the hole deviation (error ≤0.3mm), ensure smooth insertion of the lead wire, and further improve the overall processing quality.

[0014] Preferably, the synchronous wheel assembly is provided with at least two groups, and the multiple groups of the synchronous wheel assembly are symmetrically arranged along the length direction of the frame; each group of the synchronous wheel assembly corresponds to a group of the double-head punch pin and a group of the bending lead insertion head, and can realize punching and insertion of multiple firework outer tubes at the same time. The multiple groups of components are symmetrically arranged, can punch and insert multiple firework outer tubes at the same time, improve the batch processing efficiency, realize continuous processing of the row of tubes without additional avoiding structures, ensure the production continuity, and ensure the consistency of the processing precision of multiple tubes.

[0015] Preferably, the bent wire head is embedded with a limiting stopper, which can effectively prevent the lead wire from being squeezed and damaged during the bending into a U shape, thereby improving the product yield and quality.

[0016] In a second aspect, the embodiments of the present application provide a method for punching and inserting a lead wire into a firework outer tube, which is implemented by using the firework outer tube punching and inserting device according to any one of the first aspect, and includes the following steps:

[0017] S1, punching process: start the punch pin driving cylinder, drive the synchronous gear frame to move downward along the linear guide rail, and drive the synchronous belt to move, so that the punching pin fixed plate and double-end punching pin connected to one side of the synchronous belt move downward to punch two holes on the firework outer tube at the preset position; complete the punching action, and the punch pin driving cylinder resets to drive the double-end punching pin to reset;

[0018] S2, bending and inserting process: start the inserting cylinder, and the roller at the output end of the inserting cylinder slides along the sliding groove of the inserting driving block, drives the inserting driving block to move downward, drives the bending and inserting head connected to the inserting driving block on the other side of the synchronous belt to move downward, and at the same time, the synchronous belt drives the double-end punching pin to move upward, so as to realize the reverse and staggered movement of the double-end punching pin and the bending and inserting head, and avoid collision;

[0019] S3, lead wire processing and insertion: during the downward movement of the inserting driving block, the cutting blade driven by the inserting driving block synchronously cuts the lead wire, the bending head of the bending and inserting head presses the lead wire into a U shape, and stops at a position without damaging the lead wire; the inserting cylinder continues to move downward, drives the stopper to retreat, and the U-shaped lead wire is pushed into the hole of the outer tube under the action of the compression spring;

[0020] S4, resetting process: the inserting cylinder resets, the bending and inserting head moves upward, the stopper resets under the action of the resetting spring, the synchronous belt drives the double-end punching pin to move downward and reset, and one punching and inserting cycle is completed, and the next cycle is repeated.

[0021] The synchronous belt transmission realizes precise reverse linkage of punching and inserting actions, and completely avoids component collision; the processes (punching, bending, cutting, and inserting) are synchronized and connected, the lead wire cutting and insertion precision (error ≤0.3 mm) is improved; the whole process is automatically cycled, and the single cycle time is shortened to 3-4 seconds; a plurality of components are adapted for parallel processing, and without additional avoiding steps, the continuous production of the array tube can be realized, and the batch processing efficiency is significantly improved.

[0022] Preferably, in steps S1 and S2, multiple groups of the double-head punching needle and multiple groups of the curved wire insertion head move synchronously to achieve simultaneous punching and insertion of at least two firework outer tubes, and the continuous processing of the row of outer tubes can be completed without pausing or lifting the transmission assembly. The synchronous movement of multiple groups of components can simultaneously complete the processing of at least two firework outer tubes, doubling the output per unit of time; the continuous flow processing of the row of outer tubes can be achieved without pausing or lifting the transmission assembly, eliminating non-processing waiting time and improving batch production efficiency by more than 30%; the high consistency of each group of movements ensures uniformity of multi-tube processing precision (hole position and insertion deviation ≤0.5mm), while eliminating the need for additional avoidance driving structure, simplifying the process and reducing the risk of failure.

[0023] Compared with the prior art, the beneficial results of the present application are:

[0024] (1) Abandoning the traditional "gear-double rack meshing", adopting "synchronous belt reverse linkage", eliminating the risk of component collision from the structure, significantly reducing equipment failure rate; synchronous belt transmission does not require high-precision machining and frequent metal component replacement, reducing maintenance cost, extending maintenance cycle by 3-5 times, and significantly improving equipment use economy.

[0025] (2) Through process synchronization (synchronous cutting and insertion, punching and avoidance linkage), the single cycle time is shortened to 3-4 seconds, the efficiency is improved compared with the prior art; supporting parallel processing of multiple groups of components, the row of outer tubes can be continuously produced without pausing or lifting the transmission assembly, further improving batch production efficiency and significantly increasing output per unit of time.

[0026] (3) Straight line guide vertical guide, roller-slotted buffer drive and other structures ensure that the straightness error of movement is ≤0.1mm / m, and the deviation of lead wire cutting and insertion is controlled within ±0.3mm; the design of solid double-head punching needle and integrated curved wire insertion head ensures the accuracy of hole position and the consistency of lead wire formation, effectively avoids the problem of lead wire insertion jamming, and improves the overall processing yield.

[0027] (4) Eliminate additional avoidance driving and independent reset components, the equipment structure is more compact, the manufacturing cost is reduced, and it is suitable for the diversified production needs of different scale firework factories, and the application range is more extensive.

[0028] (5) Rolling friction replaces sliding friction, reducing driving energy consumption; modular assembly design simplifies installation and maintenance process, shortens downtime, further reduces enterprise production and operation cost, and meets the industry development trend of automation and low cost. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings are included to provide a further understanding of embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and, together with the description, serve to explain the principles of the application. Other embodiments and many of the intended advantages of the present application will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings.

[0030] Figure 1 is the overall structure of the embodiment of the fireworks outer tube punching and inserting device;

[0031] Figure 2 is the front view of the embodiment of the fireworks outer tube punching and inserting device of the present application;

[0032] Figure 3 is the cross-sectional view along Figure 2 A-A;

[0033] Figure 4 is the flowchart of the embodiment of the fireworks outer tube punching and inserting method of the present application.

[0034] BRIEF DESCRIPTION OF DRAWINGS: 1, frame; 2, double-end punching needle; 3, inserting head; 4, curved wire head; 5, synchronous wheel frame; 6, synchronous belt; 7, punching needle fixing plate; 8, punching needle driving cylinder; 9, linear guide rail; 10, inserting cylinder; 11, inserting driving block; 12, lead wire guide groove limiting block; 13, lead wire cutting blade; 14, blocking piece. DETAILED DESCRIPTION

[0035] The application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related application, but not to limit the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for ease of description.

[0036] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0037] In a first aspect, the embodiment of the present application discloses a fireworks outer tube punching and inserting device, as shown in the figure, the device comprises a frame 1 and a double-end punching needle 2 for punching the fireworks outer tube, and further comprises a curved wire inserting head 3, a synchronous wheel assembly, a punching needle driving device and an inserting driving device. Figures 1-3

[0038] Specifically, the curved wire inserting head comprises an inserting head 3 and a curved wire head 4, the inserting head 3 is slidingly arranged between the curved wire heads 4, and a compression spring and a blocking piece are arranged between the upper end of the inserting head 3 and the curved wire heads 4, for bending and inserting the lead wire into the outer tube hole and preventing the lead wire from being squeezed and damaged. In this embodiment, the curved wire head 4 is provided as two.​

[0039] The synchronous wheel assembly comprises a synchronous wheel frame 5 and a synchronous belt 6 arranged on the synchronous wheel. One side of the synchronous belt 6 is fixedly connected with a punching needle fixing plate 7, the punching needle fixing plate 7 is connected with the double-end punching needle 2, and the other side of the synchronous belt 6 is connected with the insertion guide driving block 11 through a connecting rod. The synchronous wheel assembly realizes the reverse linkage of the double-end punching needle 2 and the insertion guide driving block 11. Through the reverse linkage of the two sides of the synchronous belt 6, the interference of the double-end punching needle 2 and the insertion guide head 3 and the curved wire head 4 connected with the insertion guide driving block 11 is completely eliminated, and the risk of collision caused by the meshing gap is reduced compared with the traditional gear-rack structure.

[0040] In the embodiment, the punch needle driving device is provided as a punch needle driving cylinder 8, the punch needle driving cylinder 8 is connected with the synchronous wheel frame 5, and the synchronous wheel frame 5 is installed on a linear guide rail 9. The punch needle driving cylinder 8 can drive the synchronous wheel frame 5 to move up and down along the linear guide rail 9. The linear guide rail 9 is fixed in the vertical direction on the machine frame 1, the synchronous wheel frame 5 is in sliding fit with the linear guide rail 9, and the piston rod of the punch needle driving cylinder 8 extends and retracts in the vertical direction to drive the synchronous wheel frame 5 to move linearly along the linear guide rail 9.

[0041] In a specific embodiment, the punch needle driving device is provided as a punch needle driving cylinder 8, the piston rod of which is connected with the synchronous wheel frame 5 through a floating joint, and the synchronous wheel frame 5 is in sliding fit on the linear guide rail 9 which is fixed vertically on the machine frame 1. The parallelism error of the linear guide rail 9 is ≤0.1mm / m, which ensures the straightness of the up and down movement of the synchronous wheel frame 5 and avoids scattered structure. The vertical guidance of the linear guide rail 9 ensures the straightness of the movement of the synchronous wheel frame 5 (error ≤0.1mm / m), and cooperates with the vertical driving of the cylinder to make the force transmission more direct and improve the stability of the movement; reduces the transmission shaking of the synchronous belt 6, ensures the reverse linkage precision of the punching needle and the insertion guide head 3, and further eliminates the risk of interference.

[0042] The insertion guide driving device is provided as an insertion guide cylinder 10, the output end of which is provided with a roller, the curved wire insertion guide head is connected with an insertion guide driving block 11, the insertion guide driving block 11 is provided with a sliding groove, the roller is slidingly embedded in the sliding groove, and the insertion guide cylinder 10 drives the curved wire insertion guide head to move up and down through the cooperation of the roller and the sliding groove. The insertion guide cylinder 10 drives the curved wire insertion guide head to move up and down through the cooperation of the roller and the sliding groove, and drives the double-end punching needle 2 to move up and down in the opposite direction of the curved wire insertion guide head through the transmission of the synchronous belt 6, thereby avoiding the interference of the double-end punching needle 2 and the curved wire insertion guide head.

[0043] The device realizes multiple core technical effects through innovative structural design: first, relying on reverse linkage of the synchronous belt 6, the interference between the punching needle and the lead insertion head 3 is completely eliminated, and the operation safety is greatly improved; second, the transmission structure is simplified, the processing and maintenance costs are reduced, and the service life of the equipment is prolonged; third, the cooperation of the linear guide rail 9 and the roller and the sliding groove improves the motion stability and reduces the energy consumption; fourth, the function synchronization is optimized, the processing cycle time is shortened, and the lead cutting precision is improved; fifth, multiple assemblies are symmetrically arranged, and the continuous processing of the row of cylinders can be realized without additional avoiding structure, which adapts to the batch production demand.

[0044] In the embodiment, the firework outer tube punching and lead insertion device further comprises a lead guide slot limiting block 12, the bent lead head 4 and the lead insertion head 3 are installed in the lead guide slot limiting block 12, and the lead guide slot limiting block 12 is fixedly connected with the rack 1. The integrated fixed bent lead head 4 and the lead insertion head 3 guarantee the lead forming and insertion precision; the single-point connection synchronous belt 6 reduces the stress dispersion and improves the transmission and reverse linkage stability; the modular assembly and maintenance are realized, the assembly efficiency is improved, and the downtime is shortened.

[0045] The cutting device is provided with a cutting blade 13, the cutting blade 13 is installed on the rack 1, the cutting blade 13 is connected with a torsional spring and a pulley on the lead insertion driving block 11, the lead insertion driving block is connected with the cutting blade through a roller, the lead insertion driving block 11 can drive the cutting blade 13 to cut the lead synchronously when it goes down, and the cutting blade 13 is automatically reset through the torsional spring when the lead insertion driving block 11 goes up. The cutting blade 13 moves synchronously with the lead insertion driving block 11, realizes the lead cutting and insertion without delay, improves the cutting precision, the lead cutting error is less than or equal to ±0.3 mm, completely solves the problem of “cutting short” or “cutting not” easily occurring in the traditional fixed blade; without additional driving components, the structure is simplified and the action coordination is improved.

[0046] The automatic retreating device of the blocking piece comprises a blocking piece 14 and a reset spring, the blocking piece 14 is arranged on the rack 1 and located below the bent lead insertion head, the blocking piece 14 is driven to retreat when the lead insertion cylinder 10 goes down to the preset position, and the blocking piece 14 is reset under the action of the reset spring when the lead insertion cylinder 10 resets. The blocking piece 14 automatically retreats to avoid interference with the lead insertion; the reset spring drives the blocking piece 14 to automatically reset after the lead insertion is completed, without additional driving, the structure is simplified; the lead insertion action is continuous, and the processing cycle efficiency is not affected.

[0047] Meanwhile, the double-head punching needle 2 in the embodiment of the application is of a solid structure, and sharp punching ends are arranged at both ends. The solid structure greatly improves the strength and rigidity of the punching needle, avoids deformation and fracture after long-term use, and prolongs the service life; the sharp punching ends at both ends ensure the accurate and smooth punching of the firework outer tube, reduce the hole deviation (error ≤0.3 mm), guarantee the smooth insertion of the subsequent lead, and further improve the overall processing quality.

[0048] In a second aspect, the embodiments of the present application also disclose a method for punching and inserting a firework outer tube, which is implemented by using the firework outer tube punching and inserting device as described in the first aspect, and comprises the following steps as shown in Figure 1 and Figure 4

[0049] S1, punching process: start the punch pin driving cylinder 8, drive the synchronous gear frame 5 to move downward along the linear guide rail 9, drive the synchronous belt 6 to move, so that the double-head punch pin 2 connected to one side of the synchronous belt 6 moves downward and punches two holes on the firework outer tube at the preset position; complete the punching action, the punch pin driving cylinder 8 resets, and the double-head punch pin 2 resets;

[0050] S2, wire bending and inserting process: start the inserting cylinder 10, the roller at the output end of the inserting cylinder 10 slides along the sliding groove of the inserting driving block 11, drive the inserting driving block 11 to move downward, drive the wire bending and inserting head at the other side of the synchronous belt 6 connected to the inserting driving block to move downward, at the same time, the synchronous belt 6 drives the double-head punch pin 2 to move upward, realize the reverse and staggered movement of the double-head punch pin 2 and the wire bending and inserting head, and avoid collision;

[0051] S3, lead wire processing and insertion: during the downward movement of the inserting driving block 11, the cutting blade 13 driven by the inserting driving block 11 synchronously cuts the lead wire, the wire bending head 4 of the wire bending and inserting head presses the lead wire into a U shape and stops at a position without damaging the lead wire; the inserting cylinder 10 continues to move downward, drives the stop piece 14 to retreat, and the wire bending and inserting head 3 pushes the U-shaped lead wire into the hole of the outer tube under the action of the compression spring;

[0052] S4, resetting process: the inserting cylinder 10 resets, the stop piece 14 resets under the action of the resetting spring, the wire bending and inserting head moves upward, the stop piece resets under the action of the resetting spring, the synchronous belt 6 drives the double-head punch pin 2 to move downward and reset, and one punching and inserting cycle is completed, and the next cycle is repeated.

[0053] The method takes double-tube parallel processing as an example, realizes precise reverse linkage of punching and inserting actions through the synchronous belt 6 transmission, completely avoids component collision, synchronously connects each process (punching, wire bending, lead wire cutting and insertion), improves the lead wire cutting and insertion precision (error ≤0.3 mm), shortens the single-cycle time to 3-4 seconds, adapts to parallel processing of multiple assemblies, realizes continuous production of multiple tubes without additional avoiding steps, and significantly improves batch processing efficiency.

[0054] ​In addition, in steps S1 and S2, the plurality of groups of double-end punching needles 2 and the plurality of groups of curved wire insertion heads 3 are synchronized to punch and insert at least four outer tubes of fireworks simultaneously, and the continuous processing of the outer tubes in the row can be completed without pausing or lifting the transmission assembly, thereby doubling the output per unit time; the consistency of the actions of each group is high, ensuring that the processing precision of the multiple tubes is uniform (the deviation of the hole position and the insertion is less than or equal to 0.5 mm), simplifying the process and reducing the risk of failure.

[0055] The device of the embodiment is designed by modular assembly, which not only ensures the stability and precision of operation, but also simplifies the maintenance process. When a component fails, the corresponding module can be individually disassembled and replaced, greatly shortening the downtime, and fully adapting to the large-scale production needs of large, medium and small fireworks factories.

[0056] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and also covers other technical solutions formed by any combination of the above technical features or their equivalent features without deviating from the above inventive concept. For example, the above features are replaced with the technical features disclosed in the present application (but not limited to) having similar functions to form a technical solution.

Claims

1. A device for punching and inserting holes in a fireworks outer tube, comprising a frame and a double-ended punching needle for punching holes in the fireworks outer tube, characterized in that, The device also includes: A wire bending connector includes a connector and a bending head. The connector is slidably disposed between the bending heads, and a compression spring and a stop are provided between the upper end of the connector and the bending head for bending the wire and inserting it into the outer cylinder hole and preventing the wire from being squeezed and damaged. A timing pulley assembly includes a timing pulley frame and a timing belt wound around the timing pulley. One side of the timing belt is fixedly connected to a punch pin fixing plate, and the punch pin fixing plate is connected to a double-headed punch pin. The other side of the timing belt is connected to an insertion drive block via a connecting rod. The punch driving device is configured as a punch driving cylinder, which is connected to the synchronous pulley frame and the synchronous pulley frame is mounted on a linear guide rail. The punch driving cylinder can drive the synchronous pulley frame to move up and down along the linear guide rail. The insertion drive device is configured as an insertion cylinder. The output end of the insertion cylinder is equipped with a roller. The insertion drive block is connected to the bending insertion head. The insertion drive block is equipped with a sliding groove. The roller is slidably embedded in the sliding groove. The insertion cylinder drives the bending insertion head to move up and down through the cooperation of the roller and the sliding groove. It also drives the double-headed punch to move up and down in the opposite direction to the bending insertion head through the transmission of the synchronous belt, so as to avoid interference between the double-headed punch and the bending insertion head.

2. The firework outer tube punching and insertion device according to claim 1, characterized in that, It also includes a lead wire guide groove limiting block, in which the bend head and the insertion head are both installed, and the lead wire guide groove limiting block is fixedly connected to the frame.

3. The firework outer tube punching and insertion device according to claim 1, characterized in that, It also includes a cutting device, which is configured as a cutting blade. The cutting blade is mounted on the frame. The insertion drive block is connected to the cutting blade through rollers. When the insertion drive block moves downward, it can drive the cutting blade to cut the lead wire synchronously. When the insertion drive block moves upward, the cutting blade is reset by a torsion spring.

4. The firework outer tube punching and insertion device according to claim 1, characterized in that, It also includes an automatic stop retraction device, which includes a stop and a return spring. The stop is located on the frame and below the bending insertion head. When the insertion cylinder moves down to a preset position, it can drive the stop to move backward. When the insertion cylinder returns to its original position, the stop is reset by the action of the return spring.

5. The firework outer tube punching and insertion device according to claim 1, characterized in that, The linear guide rail is fixed vertically to the frame, the synchronous pulley frame slides with the linear guide rail, and the piston rod of the punch drive cylinder extends and retracts vertically, driving the synchronous pulley frame to move linearly along the linear guide rail.

6. The firework outer tube punching and insertion device according to claim 1, characterized in that, The double-ended punch is a solid structure with sharp punched ends at both ends.

7. A method for drilling and inserting leads into the outer tube of fireworks, characterized in that, The method employs the firework outer tube punching and insertion device as described in any one of claims 1-6, comprising the following steps: S1. Punching process: Start the punch drive cylinder to drive the synchronous pulley frame to move downward along the linear guide rail. The synchronous pulley frame drives the synchronous belt to move, causing the double-headed punching needle connected to one side of the synchronous belt to move downward and punch two holes in the firework outer tube at the preset position. After the punching action is completed, the punch drive cylinder returns to its original position, driving the double-headed punching needle to reset. S2, Bending and Inserting Process: Start the insertion cylinder, and the roller at its output end slides along the slide groove of the insertion drive block, driving the insertion drive block to move downward, which in turn drives the bending insertion head connected to the insertion drive block on the other side of the synchronous belt to move downward. At the same time, the synchronous belt drives the double-headed punching needle upward, realizing the reverse staggered movement of the double-headed punching needle and the bending insertion head to avoid collision. S3. Lead wire processing and insertion: During the downward movement of the lead wire insertion drive block, the lead wire cutting blade driven by it cuts the lead wire simultaneously. The bending head of the lead wire insertion head presses the lead wire into a U-shape and stops it at a position that does not damage the lead wire. The lead wire insertion cylinder continues to move downward, the drive stop moves backward, and the lead wire insertion head pushes the U-shaped lead wire into the hole of the outer cylinder under the action of the compression spring. S4. Reset process: The insertion cylinder returns to its original position, the bending insertion head moves upward, the stop is reset under the action of the reset spring, and the synchronous belt drives the double-headed punching needle downward to reset, completing one punching and insertion cycle. The cycle repeats itself and the next cycle begins.

Images