A drill point and washer mechanical assembly device

Abstract

The application discloses a kind of drill tail wire and washer mechanical assembly device, the device includes electric permanent magnet and assembly component;The first end of pressing plate of assembly component is sleeve into station, tail end is blanking station, there is pressing plate long hole on pressing plate, bottom surface is arc, the distance with the upper surface of electric permanent magnet gradually decreases.Guide slot is located above guide plate, and there is guide hole in feed end;Guide plate is located above slide plate, and is processed with guide plate long hole.In sleeve into station, guide hole and pressing plate long hole are located in a vertical plane, and pressing tablet positioning washer.In motion component, it is the rotating disc of plane rotation, or horizontal chain transmission device, or vertical rotating rotating wheel, and electric permanent magnet is fixed on motion component.Drill tail wire is matched with washer in sleeve into station, and in subsequent movement process, pressing plate presses down washer, so that drill tail wire and washer are assembled.The equipment of the application is simple in structure, low in manufacturing cost and use cost, and high in assembly efficiency.

Description

Technical Field

[0001] This invention is applied to the field of self-drilling wire production, and relates to the assembly of self-drilling wire and washers, specifically a simple device for the efficient assembly of self-drilling wire and washers. Background Technology

[0002] When self-drilling screws are sold, the screw rod and plastic washer are assembled as a single unit. Initially, this was done manually by simply inserting the screw rod into the washer. However, with rising labor costs and improved machining capabilities, automated mechanical assembly of the screw rod and washer has begun. (See attached image) Figure 1 This is an automatic assembly machine for self-drilling screws and washers sold on the market. Multiple upper and lower sliding rod mechanisms are evenly distributed around the circumference of the rotating body 115. The upper and lower sliding rod mechanisms are aligned, with the upper part being the upper sliding rod mechanism and the lower part the lower sliding rod mechanism. An upper guide wheel 102 is mounted on the upper sliding rod 101 of the upper sliding rod mechanism. The upper guide wheel 102 cooperates with the upper slide rail 103. The upper sliding rod 101 passes through the upper guide plate I 104 and the upper guide plate II 106, and a compression spring 105 is installed between the two guide plates. When the rotating body 115 drives the upper guide plate and the upper sliding rod to rotate, the compression spring 105 and the upper slide rail 103 cooperate, allowing the upper sliding rod to move up and down along the guide hole of the upper guide plate. The pressure head 107 at the bottom of the upper sliding rod can press the self-drilling screw tip firmly or loosen it. Similarly, a lower guide wheel 112 is installed at the lower part of the sliding rod 111 of the sliding rod mechanism. The lower guide wheel 112 cooperates with the sliding track 113. The sliding rod 111 passes through the lower guide plate I 109 and the lower guide plate II 110. When the rotating body 115 drives the lower guide plate and the sliding rod to rotate, under the gravity of the sliding rod 111 and the cooperation of the lower guide wheel 112 and the sliding track 113, the sliding rod 111 can move up and down along the guide through hole of the lower guide plate. The sliding rod and the upper sliding rod slide up and down relative to each other at basically the same time. During production and assembly, the self-drilling screw 3 and the washer 1 are fed by two vibrating feeding devices. The self-drilling screw 3 slides along the slide plate 4 into the notch on the circumferential edge of the support ring plate 114. The self-drilling screw 3 is suspended on the support ring plate 114 by the screw head. At the same time, the washer 1 is fed from the guide groove 2 and automatically falls into the groove at the upper end of the branch pipe 108. The upper slide track 103 and the lower slide track 113 are fixed devices. As the rotating body 115 rotates, the upper and lower sliding rods move up and down. When the pressure head 107 compacts the drill tail wire end, the sliding rod moves upward, and the washer 1 placed on its top support pipe 108 fits into the drill tail wire, realizing the automatic assembly of the drill tail wire and the washer. Then, the upper and lower sliding rods separate towards each other. At the unloading position, the assembled drill tail wire assembly is pushed off the support ring plate 114 by a lever and enters the hopper. One rotation of the rotating body completes one assembly operation. The number of upper and lower sliding rods and their rotation speed determine the assembly production efficiency.

[0003] The mechanical assembly of the aforementioned self-drilling screw and washer significantly increases production efficiency compared to manual labor. However, its disadvantages include: 1) High equipment manufacturing costs. All opposing sliding rods must be aligned, requiring high machining precision; 2) Use of lubricating oil. To reduce sliding friction of the sliding rods, lubricating oil needs to be injected into the guide holes of the guide plate. Lubricating oil dripping can contaminate the self-drilling screw, especially corroding the plastic washer, and also increases the workload of on-site equipment management, requiring regular wiping of oil stains; 3) Numerous moving parts, resulting in a large amount of maintenance and a need for a large reserve of spare parts; 4) When changing the specifications of the self-drilling screw, a large number of branch pipes and pressure heads need to be adjusted, resulting in a large workload for adjustment.

[0004] In the field of automatic screw assembly, there are many patent applications for automatic expansion bolt assembly machinery, such as CN216607941U an expansion bolt assembly machine, CN214237023U an expansion bolt sleeve assembly device, CN205414900U an expansion bolt assembly machine, CN202622324U an automatic expansion bolt assembly machine, CN113953823A an expansion bolt assembly machine, CN110497172B an expansion bolt assembly device, CN105619069B an expansion bolt assembly machine, CN103949868A a mechanical fully automatic expansion bolt assembly machine, and CN102632385B an automatic expansion bolt assembly machine. For the assembly of washers and bolts, CN106239140A discloses a bolt, spring washer, and flat washer combination machine, which uses the slot on the edge of the indexing turntable to position the bolt, with the bolt shank top to bottom, and installs the spring washer and flat washer in sequence. CN113118752A discloses an automatic feeding and assembly device for flat washers. It uses negative pressure to grip the flat washers, a servo motor slide for lateral movement, a side rail slide cylinder for vertical movement, and a limit sensor for positioning. While this positioning is accurate, the mechanism is complex and inefficient. CN210524389U discloses an automatic assembly machine for plastic gaskets and screws. When the turntable rotates to the feeding station, the feeding port aligns with the plastic gasket, and the gasket enters the feeding port. The turntable rotates to the assembly station, where a side clamping mechanism presses the plastic gasket into the feeding port, and a screw-locking mechanism tightens the screw onto the plastic gasket. The turntable then rotates to the discharge station, where the gasket falls from the notch in the chassis onto the discharge plate. This assembly machine has only three stations on the turntable, and can only assemble one product per revolution, resulting in low production efficiency. Summary of the Invention

[0005] The technical problem solved by this invention is to provide a mechanical assembly device for a drill tip wire and a washer, which utilizes the structural characteristics of the drill tip wire tip to automatically assemble with the washer during the movement process, thereby greatly improving production efficiency.

[0006] The technical solution adopted in this invention is as follows: a mechanical assembly device for a self-drilling wire and a washer includes an electro-permanent magnet, moving parts, and assembly parts. The assembly parts include a guide groove, a sliding plate, a guide plate, a pressure plate, and a pressure sheet. The pressure plate has an insertion station at its front end and a discharge station at its rear end. The bottom surface of the pressure plate is arc-shaped. From the insertion station to the discharge station, the distance between the pressure plate and the upper surface of the electro-permanent magnet gradually decreases. The electro-permanent magnet magnetically holds the self-drilling wire in place, and the pressure plate presses down on the washer to fit the self-drilling wire. The guide groove is located above the guide plate, and its feed end is designed with a guide hole. The guide plate is located above the sliding plate, and it has a guide plate elongated hole. A pressure plate elongated hole is also machined in the middle of the pressure plate. The guide hole, the guide plate elongated hole, and the pressure plate elongated hole all stabilize and guide the self-drilling wire. The pressure plate is elastic and is used to position the washer at the insertion station. The pressure plate is fixed to the guide groove, located above the guide groove, with its free end pointing upwards. The distance between its lower surface and the upper surface of the guide groove gradually decreases, using elastic force and friction to position the washer; alternatively, the pressure plate can be fixed to both sides of the feed inlet of the guide groove, using the position of the pressure plate to position the washer. In one embodiment, the moving component includes a planar rotating turntable, and the electro-permanent magnet can be the turntable or fixed to it. The elongated hole on the pressure plate is an arc concentric with the turntable. The elongated hole and the guide hole are located on the same vertical plane, or a vertical plane or a vertical cylinder, at the insertion station; that is, the vertical plane of the guide hole is tangent to or coincides with the vertical cylinder of the elongated hole. If the guide groove feeds along the circumference of the elongated hole, and the elongated hole feeds along its tangent, the center line of the elongated hole and the center line of the guide hole intersect at the insertion station. In another embodiment, the moving component includes a horizontal chain drive, with each pin rotatably connected to a connecting block, and an electro-permanent magnet fixed on the connecting block. The elongated hole of the pressure plate is straight and lies in a vertical plane with the elongated hole of the guide plate and the guide hole. In yet another embodiment, the moving component includes a vertically rotating wheel, with the electro-permanent magnet mounted on the outer circumference of the wheel; the pressure plate is replaced by a pressure roller, with a guide notch machined in the middle of the pressure roller, changing the sliding friction of the pressure plate to the rolling friction of the pressure roller. The guide notch, the guide hole, and the elongated hole of the guide plate are located in a vertical plane.

[0007] Furthermore, when the moving component includes a turntable, the guide groove and guide plate feed material along the tangent or circumference of the long hole in the pressure plate. When the guide plate feeds material along the tangent of the long hole in the pressure plate, the center line of the long hole in the guide plate and the center line of the guide hole intersect at the fitting station. The assembly device also includes a column, which is concentric with the turntable, and the pressure plate is fixed on the column. When replacing, the column and pressure plate are directly replaced without adjusting the position of the pressure plate.

[0008] Furthermore, the guide plate and the guide groove can be fixedly connected as a whole, structurally ensuring that the two center lines are consistent or intersect at the fitting station.

[0009] Furthermore, the chain drive device includes a sprocket, a pin, a connecting plate, and a connecting block; the sprocket has a groove machined around its periphery, which cooperates with the pin, the pin rotatably connects the connecting plate and the connecting block, and the connecting plate connects the pin to form a chain.

[0010] The advantages of this invention are: only the magnet moves, while other mechanisms can be fixed, resulting in simple equipment and low manufacturing and operating costs. The assembly of the washer and the self-drilling screw is completed during the conveying process; production efficiency depends only on the feeding speed and conveying speed, and is independent of the number of upper and lower slides. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the original assembly of the mechanical drill tail screw and washer;

[0012] Figure 2 This is a schematic diagram of the assembly principle of the present invention;

[0013] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0014] Figure 4 for Figure 2 3D schematic diagram of the feed end of the guide channel;

[0015] Figure 5 Example 1: Schematic diagram of the assembly process;

[0016] Figure 6 for Figure 5 A schematic diagram of the AA cross-section structure, showing two feeding methods;

[0017] Figure 7 and Figure 8 These are schematic diagrams of two different pressure plate structures;

[0018] Figure 9 This is a schematic diagram of the assembly process in Example 2;

[0019] Figure 10 for Figure 9 BB cross-sectional diagram;

[0020] Figure 11 This is a schematic diagram of the assembly process in Example 3;

[0021] Figure 12 for Figure 11 CC cross-sectional view;

[0022] Figure 13 This is a schematic diagram of the improved washer positioning in Example 1;

[0023] Among them: 1-washer, 2-guide groove, 3-drill screw, 4-slide plate, 5-guide plate, 6-magnet, 7-pressure plate, 8-insertion station, 9-assembly station, 10-material unloading station, 11-pressing plate, 12-guide hole, 13-turntable, 14-column, 15-lever, 16-guide plate elongated hole, 17-pressure plate elongated hole;

[0024] 21-Sprocket, 22-Pin, 23-Connecting plate, 24-Connecting block, 25-Guide rod, 26-Bracket;

[0025] 31-Rotating wheel, 32-Pressure wheel, 33-Guide notch;

[0026] 101-Upper slide rod, 102-Upper guide wheel, 103-Upper slide rail, 104-Upper guide plate I, 105-Compression spring, 106-Upper guide plate II, 107-Pressure head, 108-Branch pipe, 109-Lower guide plate I, 110-Lower guide plate II, 111-Lower slide rod, 112-Lower guide wheel, 113-Lower slide rail, 114-Support ring plate, 115-Rotation body. Detailed Implementation

[0027] The self-drilling wire has a pointed tip, allowing it to directly drill into thin plates. This invention fully utilizes the pointed tip structure of the self-drilling wire to achieve automatic assembly of the self-drilling wire and the washer. (Attached) Figure 2 This is a schematic diagram of the assembly principle of the present invention. The washer 1 is still fed using a disc vibrating feeder, sliding down into the feed area by gravity through an inclined guide groove 2. The self-drilling screw 3 also uses the original disc vibrating feeder. The assembly method of the washer and self-drilling screw in this invention is the same as the attached diagram. Figure 1 The differences are: 1) A guide plate 5 is added above the slide plate 4, and the washer guide groove 2 is located above the drill bit feed guide plate 5, with the tip of the drill bit pointing upwards. (Attached) Figure 1 The drill bit in the middle is suspended by the wire end and slides down onto the guide slide 4 for feeding. (Attached) Figure 2 The drill bit is supported by the slide plate 4, and the elongated guide hole 16 at the center of the guide plate 5 stabilizes the sliding of the self-drilling wire on the slide plate 4, and the elongated guide hole 16 determines the feeding direction. The guide plate 5 is extended to transfer the guiding function to the guide hole 12 and the pressure plate 7. 2) The self-drilling wire is fixed with a magnet. The self-drilling wire slides from the slide plate 4 onto the magnet 6, and the magnet 6 drives the self-drilling wire towards the attached... Figure 2 The magnet 6 magnetically attracts the self-drilling thread, fixing it so that it can move with the magnet. For self-drilling threads with long leads, stability decreases due to the upward shift of the center of gravity; therefore, guide plates 5, guide holes 12, or pressure plates 7 should be used to stabilize the self-drilling thread while also guiding its movement. (Attached) Figure 1 Positioned using the notch on the support ring plate 114, it remains relatively stable in a vertically suspended state, eliminating concerns about center of gravity shift. 3) Washer 1 and drill tail screw 3 mate at insertion station 8, as shown in the attached diagram. Figure 3 As shown. The tip of the drill bit 3 points vertically upwards, the washer is tilted, and the height of the washer's hole corresponds to the tip of the drill bit, allowing the tip to be inserted into the hole of the washer 1 at the insertion position. (The attached...) Figure 1 The washer and the self-drilling screw can be fed separately. The self-drilling screw is fed into the notch, and the washer is fed into the groove of branch pipe 108. 4) To ensure a good fit between the washer and the self-drilling screw, at the insertion station, the guide groove 2 and the guide plate 5 are aligned, both in the vertical direction, to ensure that the tip of the screw can be smoothly inserted into the round hole of the washer. To achieve a good fit between the tip of the screw and the round hole of the washer, at the feeding end of the guide groove, as shown in the attached... Figure 4 As shown, a guide hole 12 is designed, which is on the same vertical plane as the elongated guide hole 16 on the guide plate 5, ensuring accurate positioning of the thread tip and achieving accurate mating with the washer's circular hole. (See attached image) Figure 1 The upper and lower slides are aligned, and the guide through holes on the guide plate provide vertical guidance. 5) After the tip of the threaded rod is inserted into the washer's round hole at the insertion station 8, the washer, driven by the self-drilling thread, enters the lower surface of the pressure plate. The pressure plate 7 is tilted downwards. From the insertion station 8 to the unloading station 10, the distance between the pressure plate and the upper surface of the magnet gradually decreases. Thus, under the downward pressure of the pressure plate 7, the washer 1 gradually slides downwards onto the threaded rod of the self-drilling thread. At the same time, the long hole 17 on the pressure plate 7 provides guidance and stability for the self-drilling thread, and the long hole 17 on the pressure plate is consistent with the movement trajectory of the self-drilling thread on the magnet. Appendix Figure 2 Assembly station 9 is actually the process of pressing the assembly washer into the pressure plate 7. Figure 1 The assembly of the middle washer and the self-drilling screw takes place at the station where the distance between the upper slide rail 103 and the lower slide rail 113 is shortest. The assembly of this invention is performed during a single movement. That is to say, the attached... Figure 1 Assembly requires the upper sliding rod to move down to fix the drill bit screw, and the lower sliding rod to move up to assemble the washer, necessitating relative movement between the upper and lower sliding rods. In this invention, the drill bit screw moves to the right, and the washer moves down for assembly under the pressure of the pressure plate, resulting in only one horizontal movement. (See attached...) Figure 1 The similarities are: 1) The tip of the self-drilling screw faces the washer, making it easy to insert into the round hole; 2) The unloading station 10 uses the lever 15 to pull off the assembled self-drilling screw product.

[0028] To ensure stable insertion of the washer into station 8, an elastic pressure plate 11 is designed at the feed end of the pressure plate. The pressure plate 11 can be fixed to the pressure plate or to the guide groove. A thin copper sheet is sufficient for the pressure plate, and its elasticity does not need to be too high. The end of the pressure plate 11 is upturned to facilitate the washer's entry beneath it. The distance between the lower surface of the pressure plate and the upper surface of the guide groove 2 gradually decreases, allowing the washer sliding down the guide groove to smoothly enter the gap between them, while being fixed by the elastic pressure and friction of the pressure plate 11. The pressure plate 11 makes point contact or small-area contact with the washer; the contact area should preferably not exceed half of the washer's upper surface. After the drilled screw tip is inserted into the washer's round hole, the washer, driven by the drilled screw, overcomes elastic resistance and enters the lower surface of the pressure plate. The washer 1 moves downward along the lower surface of the pressure plate 7, completing the assembly of the washer and the drilled screw. To reduce the friction between the pressure plate 7 and the washer, the pressure plate 7 should preferably be arc-shaped. This way, the pressure point between the pressure plate and the washer can be located on or near the center line of the washer, which is conducive to the smooth insertion of the washer.

[0029] When changing the specifications of the self-drilling screw, if only the length of the self-drilling screw is changed, the vertical position of the slide plate 4 and the magnet 6, and the curvature of the pressure plate 7 can be adjusted to accommodate the length of the lead screw. If the thread size of the self-drilling screw is changed, the size of the washer hole will also change, requiring the replacement of the guide groove 2, guide plate 5, and pressure plate 7 to accommodate the thickness of the lead screw and the washer hole.

[0030] During the entire movement of the self-drilling screw, the screw rod is stabilized and guided by the sequential connection of the guide plate elongated hole 16 on the guide plate 5, the guide hole 12 on the guide groove 2, and the pressure plate elongated hole 17 on the pressure plate 7. The main functions of the guide plate elongated hole 16 and the pressure plate elongated hole 17 are stabilization, while the main function of the guide hole 12 is guidance, enabling the tip of the screw to smoothly insert into the washer's round hole.

[0031] Magnet 6 is an electro-permanent magnet. Its electrically controlled permanent magnet characteristic utilizes electrical energy only for 0.1-1 seconds during the magnetization and demagnetization processes, saving over 95% of power compared to electromagnets. During operation, no electrical energy is required; the workpiece is held solely by the permanent magnet's attraction, avoiding the risk of workpiece detachment due to loss of magnetic force in the event of a sudden power outage or damage to the cable in an electromagnetic system. This invention utilizes an electro-permanent magnet, allowing for controlled magnetization and demagnetization; operation occurs during magnetization, and surface cleaning occurs during demagnetization. This avoids the difficulties in cleaning the surface of permanent magnets and the risks associated with the power consumption and unexpected power outages associated with electromagnets.

[0032] This invention and its appendix Figure 1 Compared to other devices, this device has the following advantages: 1) Simple equipment and low cost. Only the magnet 6 moves; all other actions require no power and are completed using a fixed mechanism, greatly reducing maintenance and manufacturing costs. 2) Unidirectional positioning. The washer and drill bit are positioned only in the direction of travel, while the attached... Figure 1Center positioning of the upper and lower slides is required, i.e., bidirectional positioning is required. 3) Increase production efficiency. The assembly of washers and self-drilling screws is completed during the conveying process. Production efficiency depends only on the feeding speed and conveying speed, and is unrelated to the number of upper and lower slides. Example 1

[0033] This embodiment is a specific application of the above-described assembly principle. The structure of the assembly device in this embodiment is shown in the attached figure. Figure 5 and attached Figure 6 As shown, a rotation to the right plane can be used instead of... Figure 2 The plane moves to the right. The rotation of the plane means that the axis of rotation is vertical and the plane of rotation is horizontal.

[0034] This embodiment includes moving parts, assembly parts, and fixing parts. The moving parts include a rotating magnet 6 and a turntable 13; the assembly parts include a guide groove 2, a sliding plate 4, a guide plate 5, a pressure plate 7, and a pressure plate 11; the fixing parts include a column 14 and supports. The pressure plate 11 is not shown in the accompanying drawings of this embodiment, but its structure and function are the same as those in the attached drawings. Figure 3 The magnet 6 of the moving part can be made into a turntable 13, and the two can be combined into one; or the magnet 6 can be a ring and fixed on the turntable 13.

[0035] The fixing component is used to connect and fix the assembly components. The column 14 is fixedly connected to the pressure plate 7. The guide groove 2, the slide plate 4, and the guide plate 5 are fixed by the support. The pressure plate 11 is fixed at the first end of the pressure plate 7. That is, the first end of the pressure plate is the insertion station 8, the tail end is the unloading station 10, and the entire length of the pressure plate is the assembly station 9.

[0036] At the insertion station, the guide groove 2 of washer 1 and the guide plate 5 of drill bit screw both enter along the tangent or circumferential line of the circumference. Figure 6 Two entry methods are shown. In the left-hand insertion station of the attached diagram, the guide hole 12 and the guide plate elongated hole 16 are on the same vertical plane, allowing for circumferential tangential entry. In the upper part of the attached diagram, the center line of the guide hole 12 aligns with the rotation arc of the magnetically attracted drill tail wire tip on the turntable 13, representing circumferential entry. The guide plate elongated hole 16 enters along the circumferential tangential. After the drill tail wire is fed, it is attracted by the magnet and rotates circumferentially. The intersection point with the center line of the guide hole is the insertion station 8. The pressure plate 11 fixes the washer at the insertion station, i.e., the intersection point of the two lines, thus ensuring that the drill tail tip smoothly inserts into the washer's circular hole. Alternatively, both the center lines of the guide hole 12 and the center lines of the guide plate elongated hole 16 can be circumferentially tangential (this method can be referenced in the attached diagram). Figure 6There are two entry methods (not shown in the attached diagram), with the two center lines located on a vertical circumferential surface. Relatively speaking, adjusting the two center lines is easier when they are on a vertical plane or a vertical circumferential surface, while the intersection point method requires strict adjustment and higher precision. To reduce the adjustment workload, the guide plate 5 and guide groove 2 can be fixedly connected as a single unit, structurally ensuring that the two center lines are aligned or intersect at the insertion station. Then, based on the position and guidance of the guide plate 5, the position and orientation of the slide plate 4 can be adjusted.

[0037] The pressure plate 7 can be fixed to the column 14 as a whole by fasteners, as shown in the attached figure. Figure 7 As shown. Alternatively, it can be divided into two parts, each secured to the column or external support with fasteners, as shown in the attached diagram. Figure 8 As shown, this is for easy adjustment and replacement. It is advisable to attach... Figure 7 The pressure plate 7 and the column 14 are fixed together as a single unit. For different specifications of self-drilling screws, the column 14 can be directly replaced, making the process quick and convenient. The bottom surface of the pressure plate 7 that contacts the washer is arc-shaped, and the long hole 17 on the pressure plate 7 is a concentric arc with the turntable 13. The long hole 17 of the pressure plate and the guide hole 12 are aligned or tangent at the insertion position, ensuring that the tip of the screw thread smoothly enters the long hole 17 of the pressure plate after being fitted into the washer. When the guide groove feeds tangentially, the two center lines are tangent; if the guide groove feeds circumferentially, the two center lines are aligned.

[0038] At the unloading station 10, the self-drilling wire is removed from the magnetic turntable 13 by the lever 15, completing the assembly of one self-drilling wire product. The lever 15 can be directly fixed to the column 14.

[0039] When the specifications of the self-drilling screw change, the position of the guide plate long hole 16 and the pressure plate long hole 17 can be adjusted by replacing the column 14 integrated with the pressure plate 7, the guide plate 5 integrated with the guide groove 2, and ensuring that the self-drilling screw is stable. The replacement and adjustment are quick and convenient.

[0040] As attached Figure 6 As shown, the turntable feeds from the left and unloads from the right. Half a rotation completes the assembly of one product, and one full rotation completes the assembly of two products. This device will include... Figure 1The production efficiency of the device is doubled. That is, in this embodiment, the efficiency of producing the same specification of self-drilling wire can be doubled. Furthermore, with the same efficiency, two products of different specifications can be assembled and produced simultaneously on one assembly device, which is beneficial for timely adjustments to the production plan based on orders. This reduces the number of assembly devices that need to be started by half. The assembly device in this embodiment only involves the rotation of a turntable; its operation is simple, requires virtually no maintenance, and eliminates the need to stock spare parts for maintenance. Once the device is adjusted and started, no dedicated personnel are required to supervise it; one person can manage the loading of multiple devices, reducing labor costs. The device has few moving parts, significantly reducing the number of components and lowering the manufacturing cost. It can be manufactured by general processing enterprises, while... Figure 1 The device can only be manufactured by companies with strong processing capabilities. Therefore, this embodiment and the appendix... Figure 1 Compared with other devices, this reduces the production cost of tail wire products from multiple perspectives, including production efficiency, equipment cost, maintenance cost, and labor cost. Example 2

[0041] This embodiment is an appendix. Figure 2 Another specific application of the assembly principle. The structure of the assembly device in this embodiment is shown in the attached figure. Figure 9 and attached Figure 10 As indicated, the attached Figure 2 The movement to the right in the design is a horizontal linear movement.

[0042] This embodiment includes moving parts and assembly parts. The moving parts include a chain drive, a magnet 6, and a guide rod 25. The chain drive includes a sprocket 21, a pin 22, a connecting plate 23, and a connecting block 24. The sprocket 21 has a groove machined around its periphery, which mates with the pin 22. The pin 22 rotatably connects the connecting plate 23 and the connecting block 24. The connecting plate 23 connects multiple pins 22 into a chain. Each pin 22 rotatably connects to a connecting block 24, and a magnet 6 is fixedly connected to each connecting block 24. When the sprocket 21 rotates, it drives the chain. To ensure the horizontal movement of the magnet, the upper chain is guided by the guide rod 25, which is fixed by a bracket 26.

[0043] The assembly components are basically the same as those in Embodiment 1, including guide groove 2, slide plate 4, guide plate 5, pressure plate 7, and pressure sheet 11. Compared with Embodiment 1, this embodiment features linear movement; guide groove 2, slide plate 4, guide plate 5, and pressure plate 7 are all straight lines, eliminating the need to consider tangents or circumferences as in Embodiment 1. The pressure plate 7 has a simple structure and does not need to be made semi-circular; only the curvature of the pressure washer needs to be considered. However, the chain transmission speed limits production efficiency.

[0044] The assembly of the drill bit and washer in this embodiment follows the same principle as described above, and will not be repeated here. Example 3

[0045] This embodiment is an appendix. Figure 2 This is another specific application of the assembly principle. The structure of the assembly device in this embodiment is shown in the attached figure. Figure 11 and attached Figure 12 As indicated, the attached Figure 2 The rightward movement is designed as a vertical rotation, meaning the rotation axis is horizontal and the rotation surface is vertical.

[0046] This embodiment includes moving parts, assembly parts, and fixing parts. The fixing parts are used to fix the assembly parts and are not shown in the accompanying drawings. The assembly parts include a guide groove 2, a sliding plate 4, a guide plate 5, a pressure roller 32, and a pressure plate 11. The biggest difference from Embodiment 1 is that the pressure plate 7 is changed to a pressure roller 32, and the pressure plate 11 is changed from being fixed on the pressure plate 7 to being fixed on the guide groove 2. In the above embodiment, the pressure plate 7 can also be fixed on the guide groove 2. In this embodiment, the sliding friction of the pressure washer is changed to rolling friction. After changing to the pressure roller 32, the curvature of the pressure plate 7 is increased and the radius is reduced, so the washer is pressed down faster. A guide notch 33 is machined in the middle of the pressure roller 32. The guide notch 33 has the same function as the elongated hole 17 of the pressure plate, which stabilizes and guides the drill bit.

[0047] The moving component includes a rotating wheel 31, with magnets 6 mounted on its outer circumference. (See attached image) Figure 11 As shown, magnet 6 attracts the self-drilling wire and rotates it to the insertion station. After the washer is inserted, the tip of the wire enters the guide notch 33 of the pressure roller. The pressure roller presses the washer down and inserts it into the lead screw, thus assembling the self-drilling wire and the washer. At the unloading station, the self-drilling wire product is removed using a lever.

[0048] In Example 2, the pressure plate 7 can also be replaced with the pressure roller 32, and this invention does not exclude this replacement. The guide notch 33, the guide hole 12, and the guide plate elongated hole 16 are on the same vertical plane, ensuring the smooth and stable directional movement of the drill tail wire. However, this only increases the movement and does not save costs. Moreover, the diameter of the pressure roller is relatively large, occupying space. The most economical and practical option is still the pressure plate.

[0049] The above embodiments are different assembly methods designed based on the schematic diagram. Embodiment 1 has been manufactured and is currently being installed and tested. During the testing process, it was found that the gasket used for positioning at the insertion station was unstable due to the friction of the pressure plate; therefore, it was changed to an additional... Figure 13 The positioning method is shown. The pressure plate 11 is fixed on both sides of the feed inlet of the guide groove 2, and the pressure plate 11 is used to block the washer for positioning. This positioning method is more accurate than elastic friction positioning. When the drill tail ribbon moves the washer, the elastic sides simply open the pressure plate. A thin copper sheet can be used for the pressure plate; the elastic force does not need to be too great.

[0050] Electro-permanent magnets solve the problem of rotating magnetic disks, providing technical support for the application of this invention. The disk has an outer diameter of 650mm and an inner diameter of 530mm. Currently, permanent magnets cannot be manufactured to this large size, and small permanent magnets cannot be assembled into a ring due to the repulsion of like poles. If electromagnets are used, the problem of energizing the rotation needs to be solved, and they are constantly in a power-consuming state during production. Electro-permanent magnets can be manufactured to this large size, and no electricity is required during production, saving energy. A single magnetization can maintain the magnetism for three to four days, and the surface can be cleaned after demagnetization before remagnetization for use.

Claims

1. A mechanical assembly device for a self-drilling wire and a washer, characterized in that: It comprises an electric permanent magnet, a moving part and an assembling part; The assembling part comprises a guide groove (2), a slide plate (4), a guide plate (5), a pressing plate (7) and a pressing sheet (11); the first end of the pressing plate (7) is a sleeve-in position, and the tail end is a blanking position; the bottom surface of the pressing plate (7) is arc-shaped, and the distance from the sleeve-in position to the blanking position to the upper surface of the electric permanent magnet gradually decreases; the electric permanent magnet magnetically attracts and fixes a drill tail wire (3); and the pressing plate (7) presses down a gasket (1) to sleeve into the drill tail wire (3); The guide groove (2) is located above the guide plate (5), and the feeding end of the guide groove (2) is designed with a guide hole (12); the guide plate (5) is located above the slide plate (4), and the guide plate (5) is processed with a guide plate long hole (16); the pressing plate (7) is processed with a pressing plate long hole (17) in the middle; the guide hole (12), the guide plate long hole (16) and the pressing plate long hole (17) all stably guide the drill tail wire (3); The pressing sheet (11) is an elastic sheet, which positions the gasket at the sleeve-in position; the pressing sheet (11) is fixed on the pressing plate (7) or the guide groove (2) and is located above the guide groove (2); the free end of the pressing sheet (11) is upturned, and the distance between the lower surface of the pressing sheet (11) and the upper surface of the guide groove (2) gradually decreases; or the pressing sheet (11) is fixed on both sides of the feeding port of the guide groove (2); The moving part comprises a rotating disc, and the electric permanent magnet is the rotating disc or is fixed on the rotating disc; the guide hole (12) and the guide plate long hole (16) are located in a vertical plane or a vertical cylindrical surface; the pressing plate long hole (17) on the pressing plate (7) is a circular arc concentric with the rotating disc, and the vertical surface of the guide hole (12) is tangent to or consistent with the vertical cylindrical surface of the pressing plate long hole (17); Or the moving part comprises a horizontal chain transmission device, the pin shaft (22) of the chain transmission device is rotationally connected to a connecting block (24), and the electric permanent magnet is fixed on the connecting block (24); the pressing plate long hole (17) is linear and is located in a vertical plane with the guide plate long hole (16) and the guide hole (12); Or the moving part comprises a vertically rotating rotating wheel (31), the electric permanent magnet is installed on the outer circumference of the rotating wheel (31), the pressing plate (7) is replaced by a pressing wheel (32), the pressing wheel (32) is processed with a guide notch (33) in the middle position, and the guide notch (33), the guide hole (12) and the guide plate long hole (16) are located in a vertical plane.

2. A device for mechanically assembling a drill point and a gasket as set forth in claim 1, wherein: When the moving part comprises the rotating disc, the guide groove (2) and the guide plate (5) feed along the tangent or the circumferential line of the pressing plate long hole (17); when the guide plate (5) feeds along the tangent of the pressing plate long hole (17), the center lines of the guide plate long hole (16) and the guide hole (12) intersect at the sleeve-in position.

3. A drill point and washer mechanical assembly device according to claim 2, wherein: The assembling device further comprises a column (14), the column (14) is concentric with the rotating disc, and the pressing plate (7) is fixed on the column (14).

4. A device for mechanically assembling a drill point and a gasket as set forth in claim 1, wherein: The guide plate (5) and the guide groove (2) are fixedly connected as a whole.

5. A mechanical gage for assembling drill point flutes and shims according to claim 1 wherein: The chain transmission device comprises a chain wheel (21), a pin shaft (22), a connecting plate (23) and a connecting block (24); a groove is formed on the periphery of the chain wheel (21), the groove is matched with the pin shaft (22), the pin shaft (22) is rotationally connected with the connecting plate (23) and the connecting block (24), and the connecting plate (23) is connected with the pin shaft (22) to form a chain.

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