An assembling process of a composite gasket for a drill pilot screw

Abstract

The present application relates to the technical field of screw assembly, in particular to an assembling process of a composite gasket for a drill end screw, which comprises the following steps: the drill end screw, the metal gasket and the rubber gasket are supported by the multi-layer composite frame and slide, and are intercepted and stopped by the blocking mechanism on the stamping section; the rubber gasket is contacted with the metal gasket by the pressing cylinder of the stamping mechanism, and then passes through the space surrounded by the pressing pieces; the metal gasket is extruded to wrap the outer side of the rubber gasket, forming the composite gasket; the composite gasket is sleeved into the top section of the drill end screw and assembled by the continuous rising of the pressing cylinder; finally, the servo motor is started in delay to drive the rotating of the pushing block and the forward movement of the drill end screw on the stamping section, and the drill end screw slides out of the composite frame and is collected.

Description

Technical Field

[0001] This invention relates to the field of screw assembly technology, specifically to an assembly process for a composite washer used in a self-drilling screw. Background Technology

[0002] A self-drilling screw is a screw with a self-drilling head at the front end and a disc cap at the rear end to increase the contact area. At the same time, a rubber or silicone pad is used to cover the screw shank, and the disc cap presses down to form a preload, effectively preventing the self-drilling screw from loosening easily.

[0003] However, rubber or silicone gaskets exposed to the outside are easily hardened by heat and rain. Since the pushing force of the screw is difficult to control, if it is too large, it will crack the rubber or silicone gasket, which will not only cause it to lose its pre-tightening effect, but also make the hardening process occur faster. In short, it is not conducive to the tightening function of the self-drilling screw. Summary of the Invention

[0004] In order to overcome the defects in the prior art, the present invention aims to provide an assembly process for a composite washer for a self-drilling screw, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides an assembly process for a composite washer for a self-drilling screw, comprising the following steps:

[0006] S1. First, pour several self-drilling screws, metal washers and rubber washers into different vibrating screens for screening.

[0007] S2. Then, the composite frame is used to connect the discharge ends of several vibrating screens, while the drill screws, metal washers and rubber washers in S1 are connected in layers.

[0008] S3. When the front self-drilling screw at the top of the composite frame is driven by the rear self-drilling screw and passes the blocking proximity switch, the drive rod electric cylinder is triggered to drive several blocking rods to insert into the stamping section of the composite frame.

[0009] At this point, the metal gasket and rubber gasket are also driven to the stamping section and blocked;

[0010] S4. As the uppermost barrier in S3 approaches the stamping proximity switch, the stamping electric cylinder is triggered to drive the pressure cylinder to rise and contact the rubber pad and metal pad. After passing through the space surrounded by several pressure plates, the metal pad is bent to wrap around the rubber pad to form a composite pad until the composite pad is fitted onto the top of the drill screw.

[0011] S5. Restart the drive rod electric cylinder and the stamping electric cylinder to reset and delay the start of the servo motor to drive the dial block to rotate and move the assembled drill tail screw to slide out of the composite frame discharge end.

[0012] S6. As the self-drilling screw, metal washer, and rubber washer at the top of the composite frame slide down, the composite pad and self-drilling screw will continue to be assembled according to S3-S5, and then slide out of the composite frame to be collected.

[0013] As a further improvement to this technical solution, it also includes a composite frame distributed in three layers, a blocking mechanism set on one side of the middle of the composite frame, and a stamping mechanism set in the middle of the composite frame. The middle of the composite frame is provided with a horizontal stamping section. A servo motor is installed on the outer wall of the stamping section. The output shaft end of the servo motor passes through the upper layer of the composite frame and is sleeved with a lever. The lever is engaged with the notch on the bottom surface of the stamping section.

[0014] As a further improvement to this technical solution, the blocking mechanism includes several blocks and a drive rod electric cylinder for driving the blocks to move horizontally. A blocking proximity switch is horizontally embedded in the side wall of the high feeding end of the composite frame. The blocking proximity switch is electrically connected to the drive rod electric cylinder and the servo motor through wires. The servo motor terminal is electrically connected to a time relay, and its delay time is the total working and resetting time of the drive rod electric cylinder.

[0015] As a further improvement to this technical solution, the stamping mechanism includes several pressure plates arranged in a circular array directly below the stamping section, a stamping electric cylinder arranged below the composite frame, and a pressure cylinder sleeved with the drill screw. The pressure cylinder is coaxially connected to the stamping electric cylinder. A stamping proximity switch is vertically arranged on the inner sidewall of the stamping section. The stamping proximity switch is electrically connected to the stamping electric cylinder through a wire.

[0016] As a further improvement to this technical solution, the composite frame is composed of a screw bracket and a gasket bracket spaced vertically. The screw bracket is composed of a guide section at the highest point, an inclined section, and a stamping section in the middle. There are two inclined sections located at both ends of the stamping section. The cross-section of the screw bracket is U-shaped. The gasket bracket has the same structure as the screw bracket.

[0017] As a further improvement to this technical solution, the top two sides of the gasket bracket are provided with gasket support platforms with an L-shaped cross-section. The inner width of the gasket support platform is greater than the inner width of the gasket bracket. The center of the stamping section in the middle of the gasket bracket is provided with a through hole for insertion into the pressure cylinder. A baffle is fixedly connected between the top edges of the stamping section in the middle of the screw bracket by bolts.

[0018] As a further improvement to this technical solution, the side wall of the stamping section is provided with insertion holes on the screw bracket, the gasket bracket and the gasket platform, and several bars are inserted into several insertion holes. An avoidance groove is provided on the longitudinal centerline of the bottom edge of the screw bracket.

[0019] As a further improvement to this technical solution, a support ring is sleeved on the outer side of the top of several of the pressing plates, the pressing plates are inclined, the top opening of several of the pressing plates is narrowed, and a C-shaped spring sheet is bonded to the outer side of the pressing plate, with the top surface of the spring sheet bonded to the bottom surface of the support ring.

[0020] As a further improvement to this technical solution, a collar is provided on the outer side of the top section of the tablet, the central axis of the collar is arranged horizontally, and a support shaft that is sleeved on the inner side of the support ring is suspended.

[0021] As a further improvement to this technical solution, push rods are welded to the outward ends of several of the guardrails, and the outer ends of the push rods are coaxially connected to the piston rod of the drive rod electric cylinder. An electric cylinder frame is sleeved on the outer side of the drive rod electric cylinder.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] The assembly process of this self-drilling screw using a composite washer involves a multi-layered composite frame supporting the self-drilling screw, metal washer, and rubber washer as they slide. The components are intercepted and stopped at the stamping section by a blocking mechanism. The pressure cylinder of the stamping mechanism then pushes the rubber washer against the metal washer, and together they pass through a space enclosed by several pressure plates. The metal washer is then squeezed and wraps around the outside of the rubber washer, forming a composite washer. As the pressure cylinder continues to rise, the composite washer is fitted onto the top section of the self-drilling screw, completing the assembly. Finally, a delayed start of the servo motor drives a rotating block, causing the self-drilling screw, which is stopped at the stamping section, to move forward and slide out of the composite frame for collection. The assembly is completed in one step, creating a pre-tightening effect that effectively prevents the rubber washer from cracking. Attached Figure Description

[0024] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances.

[0025] Figure 1 This is a schematic diagram of the overall assembly structure of the present invention;

[0026] Figure 2 This is the overall front view of the present invention;

[0027] Figure 3 This is a schematic diagram of the composite frame structure of the present invention;

[0028] Figure 4 This is a spatial arrangement diagram of the blocking mechanism and the stamping mechanism of the present invention;

[0029] Figure 5This is a schematic diagram of a partial assembly structure of the stamping mechanism of the present invention;

[0030] Figure 6 This is a partially exploded view of the stamping mechanism of the present invention;

[0031] Figure 7 This is a schematic diagram of the assembly structure of the blocking mechanism of the present invention;

[0032] Figure 8 This is a schematic diagram of the assembly structure of the stamping electric cylinder of the present invention;

[0033] Figure 9 This is a schematic diagram of the assembly of the self-drilling screw and composite washer of the present invention;

[0034] Figure 10 This is a front view of the assembly of the self-drilling screw and composite washer of the present invention.

[0035] The meanings of the labels in the diagram are as follows:

[0036] 100. Composite frame; 110. Screw bracket; 111. Guide section; 112. Inclined section; 114. Clearance groove; 115. Baffle; 116. Insertion hole;

[0037] 120. Gasket bracket; 121. Gasket platform; 122. Perforation;

[0038] 130. Barrier proximity switch; 140. Stamped proximity switch; 150. Servo motor; 151. Toggle block;

[0039] 200. Barrier mechanism; 210. Barrier arm; 211. Push rod; 220. Drive rod electric cylinder; 230. Electric cylinder frame;

[0040] 300, stamping mechanism; 310, pressing plate; 311, collar; 320, support ring; 321, support shaft; 330, stamping electric cylinder; 331, pressing cylinder; 340, spring. Detailed Implementation

[0041] The details of the present invention can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on the invention, and these should all be considered to fall within the scope of the invention. The terms "installation" and "connection" should be interpreted broadly, referring to direct connection or indirect connection through an intermediate medium.

[0042] The terms "central axis," "vertical," "horizontal," "front," "rear," "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer" used herein to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, in the description of the invention, "a number" means two or more, unless otherwise explicitly specified.

[0043] Please see Figures 1-10 As shown, the present invention provides an assembly process for a composite washer for a self-drilling screw, comprising the following steps:

[0044] S1. First, pour several self-drilling screws, metal washers and rubber washers into different vibrating screens for screening.

[0045] S2. Then, the composite frame 100 is used to connect to the discharge end of several vibrating screens, while the drill screws, metal washers and rubber washers in S1 are connected in layers.

[0046] S3. When the front self-drilling screw at the top of the composite frame 100 is driven by the rear self-drilling screw and passes the blocking proximity switch 130, the drive rod electric cylinder 220 is triggered to drive several blocking rods 210 to insert into the stamping section of the composite frame 100.

[0047] At this time, the metal washer and the rubber washer are also driven to the stamping section and blocked, so that the drill screw, the metal washer and the rubber washer can slide down at the same time;

[0048] S4. As the uppermost barrier 210 in S3 approaches the stamping proximity switch 140, the stamping electric cylinder 330 is triggered to drive the pressure cylinder 331 to rise and contact the rubber pad and the metal pad. After passing through the space surrounded by several pressure plates 310, the metal pad is bent to wrap around the rubber pad to form a composite pad until the composite pad is fitted onto the top of the drill screw.

[0049] S5. Restart the drive rod electric cylinder 220 and the stamping electric cylinder 330 to reset and delay the start of the servo motor 150 to drive the dial block 151 to rotate and move the assembled drill tail screw to slide out of the material outlet of the composite frame 100.

[0050] S6. As the self-drilling screw, metal washer, and rubber washer at the top of the composite frame 100 slide down, the composite pad and self-drilling screw will continue to be assembled according to S3-S5, and then slide out of the composite frame 100 to be collected.

[0051] It also includes a composite frame 100 arranged in three layers, a blocking mechanism 200 located on one side of the middle of the composite frame 100, and a stamping mechanism 300 located in the middle of the composite frame 100. The middle of the composite frame 100 is provided with a horizontal stamping section. A servo motor 150 is installed on the outer wall of the stamping section. The output shaft end of the servo motor 150 passes through the upper layer of the composite frame 100 and is sleeved with a lever 151. The lever 151 is engaged with the notch on the bottom surface of the stamping section. The rotation of the lever 151 drives the drill tail screw that is stopped on the stamping section to move forward and slide out of the composite frame 100 and be collected.

[0052] Specifically, the blocking mechanism 200 includes several blocking bars 210 and a drive rod electric cylinder 220 for driving the several blocking bars 210 to move horizontally. A blocking proximity switch 130 is horizontally embedded in the side wall of the high feeding end of the composite frame 100. The blocking proximity switch 130 is electrically connected to the drive rod electric cylinder 220 and the servo motor 150 through wires. The servo motor 150 is electrically connected to a time relay at its terminal, and the delay time is the total working and resetting time of the drive rod electric cylinder 220.

[0053] Several barriers 210 intercept the self-drilling screw, metal washer, and rubber washer on the stamping section for stamping assembly; the servo motor 150 works with a delay after the barrier 210 has completed one round trip, and smoothly moves the assembled self-drilling screw and composite washer out of the composite frame 100 for collection.

[0054] Specifically, the stamping mechanism 300 includes a plurality of pressure plates 310 arranged in a circular array directly below the stamping section, a stamping electric cylinder 330 arranged below the composite frame 100, and a pressure cylinder 331 sleeved with the drill tail screw;

[0055] The pressure cylinder 331 is coaxially connected to the stamping electric cylinder 330. A stamping proximity switch 140 is vertically installed on the inner wall of the stamping section. The stamping proximity switch 140 is electrically connected to the stamping electric cylinder 330 through a wire.

[0056] When the proximity switch 140 senses the approach of the barrier 210, the barrier 210 is intercepted and the electric cylinder 330 is triggered to start and drive the pressure cylinder 331 to rise. The cylinder rises and pushes against the rubber pad to contact the metal pad. The cylinder then passes through the space enclosed by several pressure plates 310. The metal pad is then squeezed and wrapped around the outside of the rubber pad to form a composite pad.

[0057] As the pressure cylinder 331 continues to rise, it causes the composite pad to be fitted onto the top section of the self-drilling screw to complete the assembly; the inner diameter of the rubber pad is smaller than the outer diameter of the self-drilling screw, so that the rubber pad can be fitted onto the self-drilling screw without falling off.

[0058] Furthermore, the composite frame 100 is composed of a screw bracket 110 and a washer bracket 120 spaced vertically, and the screw bracket 110 and the washer bracket 120 are made of nylon material as a whole; the screw bracket 110 is composed of a guide section 111 at the highest point, an inclined section 112 and a stamping section in the middle, wherein there are two inclined sections 112 located at both ends of the stamping section, which are used to guide the screw to slide down;

[0059] The screw bracket 110 has a U-shaped cross-section. The gasket bracket 120 has the same structure as the screw bracket 110. The gasket bracket 120 is used to guide the metal gasket and rubber gasket to slide down from a high position and stay in the stamping section to be stamped to form a composite gasket.

[0060] Furthermore, the top two sides of the gasket bracket 120 are provided with gasket platforms 121 with an L-shaped cross-section for supporting metal gaskets, and the bottom of the gasket bracket 120 is used to support rubber gaskets. The inner width of the gasket platform 121 is greater than the inner width of the gasket bracket 120. Since the metal gasket needs to be wrapped around the outside of the rubber gasket, the outer diameter of the metal gasket is greater than that of the rubber gasket.

[0061] After wrapping, some rubber gaskets need to be exposed. The elasticity and sealing properties of the exposed rubber gaskets are used to contact the surface of the object's hole, thus creating a pre-tightening effect. At the same time, metal gaskets are used to protect the rubber gaskets from hardening due to heat and rain. The toughness of the metal gaskets is also used to achieve a positioning effect, effectively preventing the rubber gaskets from being cracked due to excessive pushing force when screwing in the screws.

[0062] The stamping section in the middle of the gasket bracket 120 has a through hole 122 for insertion into the pressure cylinder 331. The top edge of the stamping section in the middle of the screw bracket 110 is fixedly connected by bolts to a baffle 115, which is used to block the drill screw from moving upward so that the pressure cylinder 331 can smoothly fit onto the drill screw while pressing against the composite gasket.

[0063] In addition, the side wall of the stamping section is provided with insertion holes 116 on the screw bracket 110, the washer bracket 120 and the washer platform 121. Several bars 210 are inserted into several insertion holes 116 respectively. A clearance groove 114 is provided on the longitudinal center line of the bottom edge of the screw bracket 110 to avoid the threaded section of the drill screw and allow it to pass.

[0064] It is worth noting that a support ring 320 is sleeved on the outer side of the top of several pressure plates 310, the pressure plates 310 are set at an angle, the top opening of several pressure plates 310 is in a narrowed state, and a C-shaped spring sheet 340 is bonded to the outer side of the pressure plate 310, and the top surface of the spring sheet 340 is bonded to the bottom surface of the support ring 320. The spring sheet 340 is made of steel sheet.

[0065] The top section of the pressure plate 310 is provided with a collar 311. The central axis of the collar 311 is arranged horizontally. The inner side of the support ring 320 is suspended with a support shaft 321 that is sleeved with the collar 311. One pair of support shafts 321 are fixedly connected to the vertical rib of the composite frame 100 by bolts. The support ring 320 suspends several pressure plates 310, and with the help of the spring sheet 340, the pressure plates 310 change from an inclined state to a vertical state when the metal pad passes through from bottom to top. At the same time, the section of the collar 311 is used to squeeze the metal pad and bend it to wrap the rubber pad. After the metal pad passes through, the spring sheet 340 pulls the pressure plates 310 to a state where the top is tilted inward and the bottom is stretched outward.

[0066] Furthermore, push rods 211 are welded to the outward ends of several guardrails 210. The outer ends of push rods 211 are coaxially connected to the piston rod of drive rod electric cylinder 220. Electric cylinder frame 230 is sleeved on the outer side of drive rod electric cylinder 220. Electric cylinder frame 230 is fixedly connected to the vertical rib of composite frame 100 by bolts, thereby supporting drive rod electric cylinder 220 to work stably.

[0067] It should be noted that the above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An assembly process for a composite washer used in a self-drilling screw, characterized in that: Includes the following steps: S1. First, pour several self-drilling screws, metal washers and rubber washers into different vibrating screens for screening. S2. Then, the composite frame (100) is used to connect the discharge ends of several vibrating screens, while the drill screws, metal washers and rubber washers in S1 are connected in layers. S3. When the front tail screw at the top of the composite frame (100) is driven by the rear tail screw and passes the barrier proximity switch (130), the drive rod electric cylinder (220) is triggered to drive several bars (210) to insert into the stamping section of the composite frame (100). At this point, the metal gasket and rubber gasket are also driven to the stamping section and blocked; S4. As the uppermost barrier (210) in S3 approaches the stamping proximity switch (140), the stamping electric cylinder (330) is triggered to drive the pressure cylinder (331) to rise and contact the rubber pad and the metal pad. After passing through the space surrounded by several pressure plates (310), the metal pad is bent to wrap around the rubber pad to form a composite pad until the composite pad is fitted onto the top of the drill screw. S5. Restart the drive rod electric cylinder (220) and the stamping electric cylinder (330) to reset and delay the start of the servo motor (150) to drive the dial block (151) to rotate and move the assembled drill tail screw to slide out of the composite frame (100) discharge end; S6. As the self-drilling screw, metal washer and rubber washer at the top of the composite frame (100) slide down, the composite pad and self-drilling screw will continue to be assembled according to S3-S5 and will slide out of the composite frame (100) and be collected. The assembly process of the composite washer for the self-drilling screw adopts a composite frame (100) with three layers distributed in the upper and lower parts, a blocking mechanism (200) set on one side of the middle part of the composite frame (100), and a stamping mechanism (300) set in the middle part of the composite frame (100) to assemble the composite washer. The middle part of the composite frame (100) is provided with a horizontal stamping section. A servo motor (150) is installed on the outer wall of the stamping section. The output shaft end of the servo motor (150) passes through the upper layer of the composite frame (100) and is sleeved with a lever (151). The lever (151) is engaged with the notch on the bottom surface of the stamping section. The blocking mechanism (200) includes a plurality of barriers (210) and a drive rod electric cylinder (220) for driving the plurality of barriers (210) to translate. A blocking proximity switch (130) is horizontally embedded in the side wall of the high feeding end of the composite frame (100). The blocking proximity switch (130) is electrically connected to the drive rod electric cylinder (220) and the servo motor (150) through wires. The servo motor (150) is electrically connected to a time relay at its terminal, and the delay time is the total working and resetting time of the drive rod electric cylinder (220). The stamping mechanism (300) includes several pressure plates (310) arranged in a circular array directly below the stamping section, a stamping electric cylinder (330) arranged below the composite frame (100), and a pressure cylinder (331) sleeved with the drill screw. The pressure cylinder (331) is coaxially connected to the stamping electric cylinder (330). A stamping proximity switch (140) is arranged vertically on the inner side wall of the stamping section. The stamping proximity switch (140) is electrically connected to the stamping electric cylinder (330) through a wire.

2. The assembly process of the composite washer for the self-drilling screw according to claim 1, characterized in that: The composite frame (100) is composed of a screw bracket (110) and a gasket bracket (120) spaced vertically. The screw bracket (110) is composed of a guide section (111) at the highest point, an inclined section (112) and a stamping section in the middle. There are two inclined sections (112) located at both ends of the stamping section. The cross-section of the screw bracket (110) is U-shaped. The gasket bracket (120) has the same structure as the screw bracket (110).

3. The assembly process for the composite washer for the self-drilling screw according to claim 2, characterized in that: The top two sides of the gasket bracket (120) are provided with gasket platforms (121) with an L-shaped cross-section. The inner width of the gasket platform (121) is greater than the inner width of the gasket bracket (120). The center of the stamping section in the middle of the gasket bracket (120) is provided with a through hole (122) for insertion into the pressure cylinder (331). The top edges of the stamping section in the middle of the screw bracket (110) are fixedly connected with baffles (115) by bolts.

4. The assembly process for the composite washer for the self-drilling screw according to claim 3, characterized in that: The sidewall of the stamping section is provided with insertion holes (116) on the screw bracket (110), the gasket bracket (120) and the gasket platform (121). Several guardrails (210) are inserted into several insertion holes (116) respectively. The bottom edge of the screw bracket (110) is provided with a clearance groove (114).

5. The assembly process for the composite washer for the self-drilling screw according to claim 4, characterized in that: A support ring (320) is sleeved on the outer side of the top of several of the pressure plates (310). The pressure plates (310) are inclined. The top opening of several of the pressure plates (310) is narrowed. A C-shaped spring sheet (340) is bonded to the outer side of the pressure plate (310), and the top surface of the spring sheet (340) is bonded to the bottom surface of the support ring (320).

6. The assembly process for the composite washer for the self-drilling screw according to claim 5, characterized in that: The top section of the tablet (310) is provided with a collar (311), the central axis of the collar (311) is arranged horizontally, and the inner side of the support ring (320) is suspended with a support shaft (321) that is sleeved with the collar (311).

7. The assembly process for the composite washer for the self-drilling screw according to claim 6, characterized in that: A push rod (211) is welded to the outer end of several of the aforementioned guardrails (210). The outer end of the push rod (211) is coaxially connected to the piston rod of the drive rod electric cylinder (220). An electric cylinder frame (230) is sleeved on the outer side of the drive rod electric cylinder (220).

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