A tool for semi-automatic batch assembly of screw components and a method of use

Abstract

The invention relates to a tooling for semi-automatic batch assembly of screw components and a method for using the tooling, comprising a flat washer assembly layer, a spring washer assembly layer, a screw assembly layer and a switching positioning plate, and also comprising a vibration device, a guide rail, a slider and a frame. The frame is arranged on the vibration device, the screw assembly layer is arranged in the middle of the bottom of the frame, the spring washer assembly layer is arranged above the screw assembly layer, the switching positioning plate is arranged above the spring washer assembly layer, and the flat washer assembly layer is arranged above the switching positioning plate. Two guide rails are respectively vertically arranged in the middle of the front and rear sides of the frame, and two sliders are arranged on each guide rail. The upper two sliders are respectively arranged in the middle of the strip sandwich plate I on both sides of the flat washer assembly layer, and the lower two sliders are respectively arranged in the middle of the strip sandwich plate II on both sides of the spring washer assembly layer, so that the spring washers, flat washers and screws are finally automatically arranged and assembled, and it is no longer necessary to screen and arrange the screws, flat washers and spring washers three times by manpower.

Description

Technical Field

[0001] The invention relates to the field of assembly of mechanical parts, and in particular to a tool for batch assembling screw components and a use method thereof. Background Art

[0002] Standard screws are one of the most commonly used fasteners for fastening and assembly. Standard screws are used in combination with flat washers of grade A and standard spring washers, and are widely used in the assembly of various products. For manufacturers that use combination screws in small and medium batches, the process of combining screws, spring washers and flat washers generally uses the method of workers assembling screws by hand. This method is boring and repetitive, wastes human resources, is time-consuming and labor-intensive, and it is difficult to ensure the normal assembly progress of the workshop; manufacturers that need to use a large number of fasteners for assembly usually adopt the following two solutions: one is to use a screw assembly machine to assemble batch screw components; the other is to use combination screws for assembly.

[0003] For the use of screw assembly machines for batch assembly of screw components, automatic screw assembly machines are equipment that is often needed in the automated production process. Its application is quite extensive. Automatic screw assembly machines are also called automatic screw locking machines, automatic screw thread locking machines, industrial tightening systems, etc. The screw assembly machines currently available on the market can replace manual assembly of combination screws. They are automated devices that use automated mechanisms to replace manual work to complete the taking, placing, and tightening of screws. However, this type of equipment is relatively bulky, and the screw conveying structure and driving mechanism structure are relatively complex. It is not possible to fully utilize the remaining space of the machine for reasonable allocation. The disassembly, assembly, and positioning functions of the automatic screw locking machine screw assembly machine are not perfect. Usually, the programming must be reset to complete the interchange of disassembly and assembly. It is not possible to automatically convert the assembly machine function more intelligently, which is very inconvenient. There are disadvantages such as non-standard manufacturing, high noise, power consumption, and it is not suitable for small batch production and prone to overcapacity.

[0004] For assembly with combination screws, combination screws are fasteners composed of a screw, spring washer, and flat washer. Combination screws are convenient to use and do not require manual matching of bolts, spring washers, and flat washers. However, the price is more expensive than individual bolts, spring washers, and flat washers. Combination screws are equipped with one more spring washer, flat washer, or spring flat washer than ordinary screws, and all of them are installed before the screws are rolled. The washers cannot be removed after rolling. When installing combination screws, a special electric wrench must be used, which has two socket heads, one on the hexagonal body of the nut and the other on the decagonal body of the external hexagonal screw. The flat washer of the combination screw is a non-standard design with a large diameter, and the old products of the enterprise cannot be replaced. Secondly, most products require the use of stainless steel screws with a higher degree of corrosion resistance, and combination screws are difficult to purchase.

[0005] In the patent with authorization number CN201510180281.8, a tooling and method for using batch assembly of screw components are disclosed, including a spring washer positioning plate, a spring washer drawer plate, a spring washer support plate referred to as a spring washer layer, a flat washer positioning plate, a flat washer drawer plate, a flat washer support plate referred to as a flat washer layer, a screw leak plate, a screw support plate, and a positioning column. It can quickly realize the one-time successful combination of small batches of screws, spring washers, and flat washers. In a short time, hundreds of screws, spring washers, and flat washers can be assembled at one time. The defects are as follows: the spring pad layer and the flat pad layer are each three-layer plates, namely the upper positioning plate, the plug plate, and the lower support plate, with a total of six layers. The spring pad layer, the flat pad layer and the screw layer are operated manually, and small batches of screws, spring washers and flat washers are screened and arranged respectively, and then the three parts are combined. That is to say, a worker needs to perform three manual vibration screenings in one working cycle, and then complete the final combination, a total of four steps, among which all operations rely on manpower and the steps are not simple enough, affecting work efficiency; furthermore, all components are basically made of stainless steel, which is heavy and inconvenient to carry, and workers are prone to fatigue when operating for a long time.

[0006] The patent with authorization number CN202122843774.9 discloses a tool for batch assembly of screws, which can assemble hundreds of screws, spring washers, and flat washers at one time in a short period of time. Compared with CN201510180281.8, the overall structure of the tool is simpler, and the number of parts is optimized, which further reduces the tool processing cost and improves the work efficiency of the workshop screw assembly to a certain extent. However, it is still a manual operation in essence, and the improvement in operating efficiency is limited. Among them, the spring pad layer and the flat pad layer have a total of four layers of plates, namely the switching positioning plate, positioning plate II, the plug plate, and the support plate. The operating steps in the screw assembly process are still not concise enough, and manual manpower is required to screen the screw components and combine and separate the various parts of the tooling.

[0007] The patent with authorization number CN213917814 U discloses a screw rapid assembly tool, in which stepped through holes are arranged in a matrix on the tooling plate. By controlling the diameter of the stepped through holes, the assembly of flat washers, spring washers and screws is completed in sequence on one tooling plate. Hundreds of screws, spring washers and flat washers can be assembled at one time, but the flat washers need to be arranged first, then the spring washers, and finally the screws can be inserted. Moreover, after each step of arrangement, it is necessary to check and verify whether there are any omissions. All of these are manual operations, which directly affects the assembly efficiency.

[0008] The patent with authorization number CN201811300173 discloses a screw and washer assembly device, in which a vibration device is provided to realize the fully automatic assembly of screws and washers. The cylinder transmission has a high degree of automation, but the structure is very complex, non-standard production, difficult to repair, and has high power consumption, large size, noise, and high cost. More importantly, only two screws can be assembled at the same time, which cannot meet the needs of mass production at all. Summary of the invention

[0009] The present invention provides a tooling and use method for semi-automatic batch assembly of screw assemblies, which adopts a three-layer structure of a flat washer layer, a spring washer layer, and a screw layer. The three-layer structure is installed on a vibration device through a frame, and corresponding slide rails and sliders are installed. The screening and arrangement of hundreds of screws, flat washers, and spring washers can be completed simultaneously through one vibration of the vibration device. By reasonably designing a switching positioning plate, it is possible to screen and arrange spring washers and allow flat washers to pass through the spring washer layer. By setting a slider guide rail, the screened and arranged screw assemblies are driven by a slider on a slide rail controlled by an automated PLC, so that the final spring washers, flat washers and screws are automatically assembled, no longer relying on human vibration, combination and separation, and no longer requiring human labor to screen and arrange screws, flat washers and spring washers in three times. Compared with previous patents, it allows operators to save time and effort in the operation process to complete the work, reducing labor intensity and boring operation.

[0010] The technical solution of the present invention is: a tooling for semi-automatic batch assembly of screw assemblies, comprising a flat washer assembly layer, a spring washer assembly layer, a screw assembly layer and a switching positioning plate, wherein the spring washer assembly layer is arranged above the screw assembly layer, and the switching positioning plate is arranged above the spring washer assembly layer through a pressing plate, and the flat washer assembly layer is arranged above the switching positioning plate, and also comprises a vibration device, a guide rail, a slider and a frame, wherein the frame is arranged on the vibration device, the screw assembly layer is arranged in the middle of the bottom of the frame, the two guide rails are respectively vertically arranged in the middle of the front and rear sides of the frame, and two sliders are arranged on each guide rail, the upper two sliders are respectively arranged in the middle of the strip sandwich plate I on both sides of the flat washer assembly layer, and the lower two sliders are respectively arranged in the middle of the strip sandwich plate II on both sides of the spring washer assembly layer.

[0011] In the above technical scheme, it also includes a flat washer frame, a spring washer frame, a screw frame and a frame. The bottom ends of the vibration device and the two guide rails are arranged at the bottom of the frame. The flat washer frame, the spring washer frame and the screw frame are all arranged on the columns of the frame. The upper end face of the positioning plate I is at the same height as the lower end face of the flat washer frame, the upper end face of the switching positioning plate is at the same height as the lower end face of the spring washer frame, the upper end face of the screw bottom plate is at the same height as the lower end face of the screw frame, and a flat washer layer notch I and a flat washer layer notch II are arranged on the front and rear sides of the flat washer frame; a spring layer notch I and a spring layer notch II are arranged on the front and rear sides of the spring washer frame; a screw layer notch I and a screw layer notch II are arranged on the front and rear sides of the screw frame.

[0012] A method for using a tool for semi-automatic batch assembly of screw components comprises the following steps:

[0013] Step 1, arrange the screw assembly:

[0014] Sprinkle the excess flat washers on the positioning plate I through the space above the flat washer assembly layer, sprinkle the excess spring washers on the switching positioning plate through the space above the spring washer assembly layer, and sprinkle the excess screws on the screw bottom plate through the space above the screw assembly layer. Start the vibration device, which drives the tooling to vibrate, so that each positioning hole I accommodates a flat washer, each spring washer hole accommodates a spring washer, and each through hole is provided with a screw arrangement; start the slider on the guide rail to drive the flat washer assembly layer and the spring washer assembly layer to move downward by 2 cm respectively, and use a brush to sweep away excess screw parts;

[0015] The screw base plate is tightly attached to the screw support plate. At this time, the screw nuts of the ninety-six through holes correspond to the ninety-six cylindrical bodies of the screw support plate one by one; the screw nuts in the ninety-six through holes will fall on the ninety-six cylindrical bodies respectively, forming a directional array of screws, and the arrangement process of the screw assembly is completed;

[0016] Step 2: Wear the spring washer:

[0017] The slider on the start guide rail drives the switching positioning plate, the positioning plate II of the spring washer assembly layer, the plug plate II and the support plate II to move downwards respectively until the lower surface of the support plate II is close to the screw bottom plate; at this time, ninety-six screw rods pass through the washer hole II of the support plate II and the plug plate washer hole III of the plug plate II and extend into the spring washer in the spring washer hole of the positioning plate II, so that the screw rods penetrate the spring washer; at this time, the center of the screw rod is aligned with the spring washer hole of the positioning plate II, the plug plate washer hole III of the plug plate II and the support plate II The circle holes II correspond one to one; drag the plug plate II to the right, and the moving distance is equal to the distance between the adjacent plug plate washer holes III and IV. At this time, the center of the screw rod corresponds one to one with the spring washer hole of the positioning plate II, the washer hole IV of the plug plate II and the washer hole II of the support plate II. Ninety-six spring washers pass through the positioning hole II on the positioning plate II, the washer positioning hole IV of the plug plate II and the washer hole II of the support plate II in sequence, and are respectively sleeved on the ninety-six screw rods and fall along the screw rods, completing the process of wearing the spring washers;

[0018] Step 3: Put on the flat washer:

[0019] Loosen the pressing piece that fixes the switching positioning plate and positioning plate II, drag the positioning plate II forward, the moving distance is equal to the distance between the adjacent spring washer holes and the flat washer holes II, and then tighten the pressing piece; at this time, the center of the screw rod corresponds to the positioning hole II of the switching positioning plate, the flat washer hole II of the positioning plate II, the plug-in plate washer hole IV of the plug-in plate II, and the washer hole II of the support plate II; start the slider on the guide rail to drive the flat washer assembly layer positioning plate I, plug-in plate I, and support plate I to move downward respectively until the lower surface of the support plate I is close to the switching positioning plate; at this time, the center of the screw rod corresponds to the flat washer hole I of the support plate I, the plug-in plate washer hole I of the plug-in plate I, and the positioning hole I of the positioning plate I; drag the plug-in plate I to the right, and the moving distance is equal to the distance between the adjacent plug-in plate washer hole I and the plug-in plate washer hole II. At this time, the center of the screw rod corresponds to the flat washer hole Ⅰ of support plate Ⅰ, the plug plate washer hole Ⅱ of plug plate Ⅰ, the positioning hole Ⅰ of positioning plate Ⅰ, the positioning hole Ⅱ of the switching positioning plate, the flat washer hole Ⅱ of positioning plate Ⅱ, the plug plate washer hole Ⅳ of plug plate Ⅱ and the washer hole Ⅱ of support plate Ⅱ. Ninety-six flat washers are sequentially passed through the plug plate washer hole Ⅱ on plug plate Ⅰ, the flat washer hole Ⅰ of support plate Ⅰ, the positioning hole Ⅱ of the switching positioning plate, the flat washer hole Ⅱ of positioning plate Ⅱ, the plug plate washer hole Ⅳ of plug plate Ⅱ and the washer hole Ⅱ on support plate Ⅱ, and are respectively put on the ninety-six screw rods and fall along the screw rods, completing the process of wearing flat washers;

[0020] Step 4: Remove the screw assembly:

[0021] The slider on the starting guide rail drives the flat washer assembly layer positioning plate I, plug plate I, support plate I, switching positioning plate, spring washer assembly layer positioning plate II, plug plate II, and support plate II to move upward to remove the screw assembly; when using the screw after completing the process of inserting the spring washer and the flat washer, pinch the screw rod with your hand to take out the screw assembly with the spring washer and the flat washer on the cylindrical body of the screw support plate through the through hole of the screw bottom plate for use.

[0022] The beneficial effect of the present invention is that the screening and arrangement of hundreds of screws, flat washers, and spring washers can be completed at the same time by a vibration device at one time. By reasonably designing the washer positioning plate, it is possible to screen and arrange spring washers and allow flat washers to pass through the spring washer layer. By setting the slider guide rail, the screened and arranged screw components are driven by the slider on the slide rail controlled by the automatic PLC, so that the final spring washers, flat washers and screws are automatically assembled, no longer relying on human vibration, combination and separation, no longer requiring human labor to screen and arrange screws, flat washers and spring washers three times, and the operator only needs to perform very simple feeding and plate extraction to change the mode, and the screw assembly effect can be achieved through fewer operating steps. Most of the tooling materials use lightweight materials, which reduces the weight of the entire tooling, increases reliability, reduces the use time cost, greatly improves the use efficiency of the tooling, and compared with the previous patent, allows operators to complete the work more time-saving and labor-saving during the operation process, reducing labor intensity and boring operation.

[0023] Compared with the tooling provided by the CN213917814 U patent in which an independent tooling plate is provided, the tooling of the present invention uses a vibration device to simultaneously arrange the flat washers, spring washers and screws. Due to the scientific control of the diameters of the positioning holes on each layer, 100% accuracy can be guaranteed without manual inspection. At the same time, since sliders and guide rails are provided, assembly can be easily completed.

[0024] Compared with the tooling provided by the CN201811300173 patent, which has a very complex structure, the tooling of the present invention utilizes precision machining of structural components to make the positioning holes of the screw assembly layer, the flat washer assembly layer and the spring washer assembly layer highly and accurately coaxial. The assembly can be completed through simple linear motion of the components. It has a small size and can be used on a desktop. It has low power consumption and relatively low cost. In particular, the tooling of the present invention can realize batch assembly.

[0025] The efficiency improvement brought by the present invention is that 96 screw components can be assembled in 9 seconds, and the assembly speed of a single screw is 0.093 seconds per screw, which is six times more efficient than the previous patented screw assembly efficiency and about 102 times more efficient than manual screw assembly, and guarantees 100% accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 yes Figure 1 Exploded diagram of the main components;

[0028] Figure 3 It is a schematic diagram of the flat gasket assembly layer structure of the present invention;

[0029] Figure 4 It is a schematic diagram of the structure of the plugboard I of the present invention;

[0030] Figure 5 It is a schematic diagram of the spring washer assembly layer structure of the present invention;

[0031] Figure 6 It is a schematic diagram of the structure of the plugboard II of the present invention;

[0032] Figure 7 This is a schematic diagram of the assembly of the screw assembly layer, frame and vibration device of the present invention;

[0033] Figure 8 It is a flow chart of the use of the present invention.

[0034] The corresponding relationship between the numerical symbols and technical features in the figure is as follows:

[0035] Flat washer assembly layer 1, spring washer assembly layer 2, screw assembly layer 3, switching positioning plate 4, vibration device 5, guide rail 6, slider 7, frame 8, pressing sheet 9, positioning pillar 10, spring 11, baffle 12, thickness washer 13, positioning column 14;

[0036] Positioning plate Ⅰ1-1, plug plate Ⅰ1-2, support plate Ⅰ1-3, strip sandwich plate Ⅰ1-4, flat washer frame 1-5, oblong positioning hole Ⅰ1-6 (positioning hole of plug plate), rectangular through hole 1-7, positioning hole Ⅰ1-8;

[0037] Washer positioning hole Ⅰ1-1-1, opening groove Ⅰ1-2-1, plug plate washer hole Ⅰ1-2-2, plug plate washer hole Ⅱ1-2-3, washer hole Ⅰ1-3-1, flat washer notch Ⅰ1-5-1, flat washer notch Ⅱ1-5-2, connecting block Ⅰ1-4-1;

[0038] Positioning plate II 2-1, plug plate II 2-2, support plate II 2-3, strip sandwich plate II 2-4, spring washer frame 2-5, oblong positioning hole II 2-6, rectangular through hole II 2-7, positioning hole II 2-8, strip plate 2-9;

[0039] Spring washer hole 2-1-1, flat washer hole 2-1-2, open groove II 2-2-1, plug plate washer hole III 2-2-2, plug plate washer hole IV 2-2-3, washer hole II 2-3-1, connecting block II 2-4-1, spring washer layer notch I 2-5-1, spring washer layer notch II 2-5-2;

[0040] Screw base plate 3-1, through hole 3-1-1, base plate positioning hole II 3-1-2, support hole 3-1-3, screw support plate 3-2, cylindrical body 3-2-1, screw surrounding frame 3-5, screw layer notch I 3-5-1, screw layer notch II 3-5-2;

[0041] Switch positioning plate 4, washer positioning hole II 4-1, rectangular through hole 4-2, positioning hole III 4-3;

[0042] Frame 8: base plate 8-1, columns 8-2. DETAILED DESCRIPTION

[0043] like Figures 1 to 7 As shown, a tool for semi-automatic batch assembly of screw components includes a flat washer assembly layer 1, a spring washer assembly layer 2, a screw assembly layer 3 and a switching positioning plate 4, and also includes a vibration device 5, a guide rail 6, a slider 7 and a frame 8. The frame 8 is arranged on the vibration device 5, the screw assembly layer 3 is arranged in the middle of the bottom 8-1 of the frame 8, the spring washer assembly layer 2 is arranged above the screw assembly layer 3, the switching positioning plate 4 is arranged above the spring washer assembly layer 2, and the flat washer assembly layer 1 is arranged above the switching positioning plate 4;

[0044] The flat washer assembly layer 1 comprises a positioning plate Ⅰ1-1, an insert plate Ⅰ1-2, a support plate Ⅰ1-3 and a strip sandwich plate Ⅰ1-4.

[0045] Ninety-six identical gasket positioning holes Ⅰ1-1-1 are arranged in a row on the positioning plate Ⅰ1-1, and the rows of gasket positioning holes Ⅰ1-1-1 are arranged in a 16*6 rectangular array on the plate surface of the positioning plate Ⅰ1-1; the number of opening slots Ⅰ1-2-1 on the plugging plate Ⅰ1-2 is 6, and a plugging plate gasket hole Ⅰ1-2-2 and a plugging plate gasket hole Ⅱ1-2-3 are arranged on each opening slot Ⅰ1-2-1, and the plugging plate gasket holes Ⅰ1- 2-2 and the plug plate gasket holes II1-2-3 are respectively arranged in a 16*6 rectangular array on the board surface of the plug plate I1-2, and the spacing between adjacent plug plate gasket holes I1-2-2 and the spacing between adjacent plug plate gasket holes II1-2-3 are equal; ninety-six identical gasket holes I1-3-1 are arranged in a row on the board surface of the support plate I1-3, and the rows of gasket holes I1-3-1 are arranged in a 16*6 rectangular array on the board surface of the support plate I1-3;

[0046] Four corresponding oblong positioning holes Ⅰ1-6 are respectively punched at the four corners of the plug plate Ⅰ1-2, and the length of the middle part of the oblong positioning hole Ⅰ1-6 corresponds to the distance between the adjacent plug plate gasket hole Ⅰ1-2-2 and the plug plate gasket hole Ⅱ1-2-3; four corresponding positioning holes Ⅰ1-8 are respectively punched at the four corners of the positioning plate Ⅰ1-1 and the support plate Ⅰ1-3;

[0047] Place the positioning plate Ⅰ1-1 on the two strip sandwich panels Ⅰ1-4, and rivet the positioning plate Ⅰ1-1, the two strip sandwich panels Ⅰ1-4 and the support plate Ⅰ1-3 together. The arrangement of the strip sandwich panels Ⅰ1-4 forms a gap of the thickness of the strip sandwich panels Ⅰ1-4 between the positioning plate Ⅰ1-1 and the support plate Ⅰ1-3; the rivet holes on the positioning plate Ⅰ1-1 and the support plate Ⅰ1-3 are respectively aligned with the rivet holes on the strip sandwich panels Ⅰ1-4. The rivet holes are concentric, and rivets are inserted into the rivet holes respectively. The inner edges of the two strip-shaped sandwich panels Ⅰ1-4 and the rivets position the inserting plate Ⅰ1-2 between the positioning plate Ⅰ1-1 and the supporting plate Ⅰ1-3, so that the center line of the six open grooves Ⅰ1-2-1 coincides with the center line connecting the several longitudinally arranged gasket positioning holes Ⅰ1-1-1 and the gasket hole Ⅰ1-3-1 on the positioning plate Ⅰ1-1 and the supporting plate Ⅰ1-3, and the assembly of the flat gasket assembly layer 1 is completed.

[0048] Ninety-six gasket positioning holes II4-1 are arranged on the surface of the switching positioning plate 4, which are arranged in rows, and six rows of gasket positioning holes II4-1 are arranged in a 16*6 rectangular array at intervals; four corresponding positioning holes III4-3 are respectively drilled at the four corners of the switching positioning plate 4.

[0049] The spring washer assembly layer 2 includes a positioning plate Ⅱ2-1, an insert plate Ⅱ2-2, a support plate Ⅱ2-3, a strip sandwich plate Ⅱ2-4 and a strip plate 2-9. Ninety-six spring washer holes 2-1-1 of the same number and ninety-six flat washer holes 2-1-2 are arranged in rows on the plate surface of the positioning plate Ⅱ2-1. Six rows of spring washer holes 2-1-1 and flat washer holes 2-1-2 are arranged in a 16*12 rectangular array at intervals. In order to reserve a pulling space for the positioning plate Ⅱ2-1, it is ensured that when the positioning plate Ⅱ2-1 is pulled, The positions of the pressing plate 9 used to fix the positioning plate Ⅱ2-1 and the switching positioning plate 4 and the rivets used to assemble the spring pad layer remain unchanged. A rectangular block is cut off on both sides of the positioning plate Ⅱ2-1 to form rectangular gaps on both sides. The strip plates 2-9 are installed with screws at the rectangular gaps on both sides. Four corresponding oblong positioning holes Ⅱ2-6 are punched at the four corners of the positioning plate Ⅱ2-1. The length of the middle part of the oblong positioning hole Ⅱ2-6 corresponds to the distance between the adjacent spring washer hole 2-1-1 and the flat washer hole 2-1-2. The structure of the plug-in plate Ⅱ2-2 is the same as that of the plug-in plate Ⅰ1-2, and the structure of the support plate Ⅱ2-3 is the same as that of the support plate Ⅰ1-3.

[0050] Place the positioning plate Ⅱ2-1 on the plug plate Ⅱ2-2, and use rivets to rivet the strip plate 2-9, two strip sandwich plates Ⅱ2-4 and the support plate Ⅱ2-3 together. The arrangement of the strip sandwich plate Ⅱ2-4 constitutes a gap of the thickness of the strip sandwich plate Ⅱ2-4 between the positioning plate Ⅱ2-1 and the support plate Ⅱ2-3; the rivet holes on the strip plate 2-9 and the support plate Ⅱ2-3 are respectively aligned with the rivet holes on the strip sandwich plate layer Ⅱ2-4 The center of the six opening grooves Ⅱ2-2-1 is coincident with the center connecting line of several spring washer holes 2-1-1 and washer hole Ⅱ2-3-1 arranged longitudinally on the positioning plate Ⅱ2-1 and the supporting plate Ⅱ2-3, and the assembly of the spring washer assembly layer 2 is completed.

[0051] The apertures of the washer positioning hole Ⅰ1-1-1, the plug plate washer hole Ⅱ1-2-3, the washer hole Ⅰ1-3-1, the flat washer hole 2-1-2, the plug plate washer hole Ⅳ2-2-3, the washer hole Ⅱ2-3-1 and the washer positioning hole Ⅱ4-1 on the switching positioning plate 4 are slightly larger than the diameter of the flat washer required for the screw to be assembled; the apertures of the plug plate washer hole Ⅰ1-2-2 and the plug plate washer hole Ⅲ2-2-2 are slightly smaller than the diameter of the spring washer to be assembled; the spring washer hole 2-1-1 is slightly larger than the diameter of the spring washer to be assembled; the widths of the opening groove Ⅰ1-2-1 and the opening groove Ⅱ2-2-1 are larger than the diameter of the screw rod; the thickness of the strip sandwich plate Ⅰ1-4 is slightly larger than the thickness of the plug plate Ⅰ1-2, and the thickness of the strip sandwich plate Ⅱ2-4 is slightly larger than the thickness of the plug plate Ⅱ2-2, so as to ensure that the plug plate Ⅰ1-2 and the plug plate Ⅱ2-2 can be moved to facilitate timely pulling when assembling the screws.

[0052] Two rectangular through holes Ⅰ1-7 are respectively arranged on the left and right sides of the positioning plate Ⅰ1-1, the plug plate Ⅰ1-2 and the support plate Ⅰ1-3, two rectangular through holes Ⅱ2-7 are respectively arranged on the left and right sides of the positioning plate Ⅱ2-1, the plug plate Ⅱ2-2 and the support plate Ⅱ2-3, and two rectangular through holes Ⅲ4-2 are respectively arranged on the left and right sides of the switching positioning plate 4. At the same time, the material of the switching positioning plate 4 is selected as acrylic plate, the material of the positioning plate Ⅱ2-1 is selected as copper, and the materials of the positioning plate Ⅰ1-1, the plug plate Ⅰ1-2, the support plate Ⅰ1-3, the plug plate Ⅱ2-2, the support plate Ⅱ2-3 and the screw support plate 3-2 are selected as lightweight materials;

[0053] Two positioning pillars 10 are respectively arranged in the middle of the left and right sides of the screw base plate 3-1, and two pillar holes 3-2-2 are respectively arranged in the middle of the left and right sides of the screw support plate 3-2. The bottom ends of the four positioning pillars 10 pass through the four pillar holes 3-2-2 respectively, and springs 11 are respectively put on the four positioning pillars 10; the positioning pillars 14 are respectively fixed in the base plate positioning holes II 3-1-2 at the four corners of the screw base plate 3-1 by threaded connection, and the assembly of the screw assembly layer 3 is completed;

[0054] Weld a stainless steel frame 8, the bottom 8-1 of the frame 8 is fixed on the upper end of the vibration device 5, and stainless steel guide rails 6 are vertically welded in the middle of the front and rear sides of the bottom of the frame 8, and two sliders 7 are sleeved on each guide rail 6; put the screw assembly layer 3 on the bottom plate 8-1 in the frame 8, and place the vibration device 5 under the bottom plate 8-1 of the frame 8. The four corner positioning columns 14 of the screw assembly layer 3 sequentially pass through the positioning holes Ⅱ2-8 at the four corners of the support plate Ⅱ2-3 of the spring washer assembly layer 2, the positioning holes Ⅲ4-3 at the four corners of the switching positioning plate 4, the long circular positioning holes Ⅱ2-6 at the four corners of the positioning plate Ⅱ2-1 and the plug plate Ⅱ2-2, the positioning holes Ⅰ1-8 and the long circular positioning holes Ⅰ1-6 at the four corners of the support plate Ⅰ1-3, the plug plate Ⅰ1-2 and the positioning plate Ⅰ1-1 of the flat washer assembly layer 1, and the positioning pillars 1 on the left and right sides. 0 Pass through the support plate Ⅱ2-3 of the spring washer assembly layer 2, the plug plate Ⅱ2-2, the rectangular through holes Ⅱ2-7 on the left and right sides of the positioning plate Ⅱ2-1, the rectangular through holes Ⅲ4-2 on the left and right sides of the switching positioning plate 4, the support plate Ⅰ1-3 of the flat washer assembly layer 1, the plug plate Ⅰ1-2 and the rectangular through holes Ⅰ1-7 on the left and right sides of the positioning plate Ⅰ1-1, and connect the screw assembly layer 3, the spring washer assembly layer 2, the switching positioning plate 4, and the flat washer assembly layer 1 into a whole. Body; four pressing plates 9 are symmetrically screwed on the left and right sides of the strip plate 2-9, and the height of the pressing plate 9 rod is greater than the sum of the thicknesses of the switching positioning plate 4 and the switching positioning plate II2-1. The pressing plate 9 is adjusted to press and fix the positioning plate II2-1 and the switching positioning plate 4; a baffle 12 is set at the upper end of the positioning pillars 10 on both sides in a threaded connection manner, and the baffle 12 connects the two positioning pillars 10 together. When it is necessary to lift the screw base plate 3-1 to place the thickness gasket 13, press the baffle 12 down to squeeze the spring 11. After the placement is completed, release the spring 11, and the screw support plate 3-2 is squeezed and reset, pressing the screw base plate 3-1 and the thickness gasket 13, which can not only fix the screw base plate 3-1 and the screw support plate 3-2, but also facilitate the setting and replacement of the thickness gasket 13; the center lines of the ninety-six cylindrical bodies 3-2-1 set on the screw support plate 3-2 coincide with the center line positions of the ninety-six through holes 3-1-1 on the screw base plate 3-1.

[0055] The ninety-six through holes 3-1-1 on the screw base plate 3-1 are respectively concentric with the ninety-six cylindrical bodies 3-2-1 on the screw supporting plate 3-2, the ninety-six washer positioning holes II4-1 on the switching positioning plate 4, the spring washer holes 2-1-1 on the positioning plate II2-1, the ninety-six plug plate washer holes III2-2-2 on the plug plate II2-2 and the ninety-six washer holes II2-3-1 on the supporting plate II2-3; according to the specifications of the screws to be assembled, thickness gaskets 13 are set between the two ends of the screw base plate 3-1 and the screw supporting plate 3-2. When the length of the screw rod changes, the thickness between the screw base plate 3-1 and the screw supporting plate 3-2 is adjusted by replacing thickness gaskets 13 of different thicknesses.

[0056] Two strip sandwich panels Ⅰ1-4 are respectively inserted at the front and rear sides of the plug-in board Ⅰ1-2, and the thickness of the strip sandwich panels Ⅰ1-4 is slightly greater than the thickness of the plug-in board Ⅰ1-2, ensuring that the plug-in board Ⅰ1-2 can move; two strip sandwich panels Ⅱ2-4 are respectively inserted at the front and rear sides of the plug-in board Ⅱ2-2, and the thickness of the strip sandwich panels Ⅱ2-4 is slightly greater than the thickness of the plug-in board Ⅱ2-2, ensuring that the plug-in board Ⅱ2-2 can move, so as to facilitate timely pulling when assembling the screws.

[0057] Connecting blocks Ⅰ1-4-1 are welded in the middle of the two strip sandwich panels Ⅰ1-4, and connecting blocks Ⅱ2-4-1 are welded in the middle of the two strip sandwich panels Ⅱ2-4. The two upper sliders 7 are respectively fixed to the middle of the strip sandwich panels Ⅰ1-4 on both sides of the flat washer assembly layer 1 by screwing through the connecting blocks Ⅰ1-4-1, and the two lower sliders 7 are respectively fixed to the middle of the strip sandwich panels Ⅱ2-4 on both sides of the spring washer assembly layer 2 by screwing through the connecting blocks Ⅱ2-4-1.

[0058] To prevent the screws from falling, flat washer frames 1-5, spring washer frames 2-5, and screw frames 3-5 are welded on the column 8-2 of the frame 8 at the height positions corresponding to the flat washer assembly layer 1, the switching positioning plate 4, and the screw assembly layer 3, respectively. The upper end surface of the positioning plate Ⅰ1-1 is flush with the lower end surface of the flat washer frame 1-5, the upper end surface of the switching positioning plate 4 is flush with the lower end surface of the spring washer frame 2-5, and the upper end surface of the screw bottom plate 3-1 is flush with the lower end surface of the flat washer frame 1-5. The lower end surface of the screw frame 3-5 is flush; in order to reserve sliding space for the slider 7, a flat washer notch Ⅰ1-5-1 and a flat washer layer notch Ⅱ1-5-2 are opened on the front and rear sides of the flat washer frame 1-5; a spring layer notch Ⅰ2-5-1 and a spring layer notch Ⅱ2-5-2 are opened on the front and rear sides of the spring washer frame 2-5; a screw layer notch Ⅰ3-5-1 and a screw layer notch Ⅱ3-5-2 are opened on the front and rear sides of the screw frame 3-5.

[0059] The dimensions of the positioning plate Ⅰ1-1, the supporting plate Ⅰ1-3, the positioning plate Ⅱ2-1 and the supporting plate Ⅱ2-3 are 330mmX263mm, the dimensions of the plug-in plate Ⅰ1-2 and the plug-in plate Ⅱ2-2 are 330mmX223mm, the dimensions of the switching positioning plate 4 are 330mmX243mm, the overall dimensions of the screw base plate 3-1 are 330mmX220mm, and the dimensions of the screw support plate 3-2 are 325mmX220mm.

[0060] like Figure 8 As shown, a method for using a tool for semi-automatic batch assembly of screws, the steps are as follows:

[0061] Step 1, arrange the screw assembly:

[0062] Sprinkle the excess flat washers onto the positioning plate Ⅰ1-1 through the space above the flat washer assembly layer 1, sprinkle the excess spring washers onto the switching positioning plate 4 through the space above the spring washer assembly layer 2, sprinkle the excess screws onto the screw base plate 3-1 through the space above the screw assembly layer 3, start the vibration device 5, and the vibration device 5 drives the tooling to vibrate. After a short time, since the diameter of the flat washer is smaller than the washer positioning hole Ⅰ1-1-1, the flat washer will fall directly onto the plug plate Ⅰ1-2, but the aperture of the plug plate washer hole Ⅰ1-2-2 on the plug plate Ⅰ1-2 is smaller than the diameter of the flat washer, so the flat washer will not fall, and the thickness of the positioning plate Ⅰ1-1 is designed according to the thickness of the flat washer, so that each washer positioning hole Ⅰ1-1-1 can only accommodate one flat washer; since the diameter of the spring washer is smaller than the washer positioning hole Ⅱ4-1, the spring washer will fall directly onto the positioning plate Ⅱ2-1, and the spring washer It will be positioned and arranged in the spring washer hole 2-1-1 on the positioning plate II 2-1, but the aperture of the plug plate washer hole III 2-2-2 on the plug plate II 2-2 is smaller than the diameter of the spring washer, so the spring washer will not fall, and the thickness of the positioning plate II 2-1 is designed according to the thickness of the washer, so that each spring washer hole 2-1-1 can only accommodate one spring washer; due to the structural design of the chamfer of each through hole and the center of gravity of the screw nut, the screw will be arranged in the through hole with the nut at the bottom and the screw rod at the top, so that each through hole is arranged with a screw. Then start the slider 7 on the guide rail 6 to drive the flat washer assembly layer 1 and the spring washer assembly layer 2 to move down 2cm respectively, and use a brush to sweep away the excess screw parts;

[0063] The screw base plate 3-1 is tightly attached to the screw support plate 3-2. At this time, the screw nuts of the ninety-six through holes 3-1-1 correspond to the ninety-six cylindrical bodies 3-2-1 of the screw support plate 3-2 one by one; the screw nuts in the ninety-six through holes 3-1-1 will fall on the ninety-six cylindrical bodies 3-2-1 respectively, forming a directional array of screws, and the arrangement process of the screw assembly is completed;

[0064] Step 2: Wear the spring washer:

[0065] The slider 7 on the start guide rail 6 drives the switching positioning plate 4, the positioning plate Ⅱ2-1 of the spring washer assembly layer 2, the plug plate Ⅱ2-2 and the support plate Ⅱ2-3 to move downward respectively until the lower surface of the support plate Ⅱ2-3 is close to the screw base plate 3-1; at this time, ninety-six screw rods pass through the washer hole Ⅱ2-3-1 of the support plate Ⅱ2-3 and the plug plate washer hole Ⅲ2-2-2 of the plug plate Ⅱ2-2 and extend into the spring washer in the spring washer hole 2-1-1 of the positioning plate Ⅱ2-1, so that the screw rods penetrate the spring washer; at this time, the center of the screw rods is aligned with the spring washer hole 2-1-1 of the positioning plate Ⅱ2-1, the plug plate washer hole Ⅲ2-2-2 of the plug plate Ⅱ2-2 and the washer hole Ⅱ2-3 of the support plate -3-1 one-to-one correspondence; drag the plug plate Ⅱ2-2 to the right, the moving distance is equal to the distance between the adjacent plug plate washer holes Ⅲ2-2-2 and plug plate washer holes Ⅳ2-2-3, at this time, the center of the screw rod corresponds to the spring washer hole 2-1-1 of the positioning plate Ⅱ2-1, the plug plate washer hole Ⅳ2-2-3 of the plug plate Ⅱ2-2 and the washer hole Ⅱ2-3-1 of the support plate Ⅱ2-3, and the ninety-six spring washers are sequentially passed through the spring washer hole 2-1-1 on the positioning plate Ⅱ2-1, the plug plate washer hole Ⅳ2-2-3 of the plug plate Ⅱ2-2 and the washer hole Ⅱ2-3-1 of the support plate Ⅱ2-3, and are respectively sleeved on the ninety-six screw rods and fall along the screw rods, completing the process of wearing the spring washers;

[0066] Step 3: Put on the flat washer:

[0067] Loosen the pressing piece 9 that fixes the switching positioning plate 4 and the positioning plate II 2-1, drag the positioning plate II 2-1 forward, the moving distance is equal to the distance between the adjacent spring washer hole 2-1-1 and the flat washer hole 2-1-2, and then tighten the pressing piece 9; at this time, the center of the screw rod corresponds to the washer positioning hole II 4-1 of the switching positioning plate 4, the flat washer hole 2-1-2 of the positioning plate II 2-1, the plug plate washer hole IV 2-2-3 of the plug plate II 2-2 and the washer hole II 2-3-1 of the support plate II 2-3; start the slider 7 on the guide rail 6 with The positioning plate Ⅰ1-1, plug plate Ⅰ1-2 and support plate Ⅰ1-3 of the dynamic flat washer assembly layer 1 move downward until the lower surface of the support plate Ⅰ1-3 is close to the switching positioning plate 4; at this time, the center of the screw rod corresponds to the washer hole Ⅰ1-3-1 of the support plate Ⅰ1-3, the plug plate washer hole Ⅰ1-2-2 of the plug plate Ⅰ1-2 and the washer positioning hole Ⅰ1-1-1 of the positioning plate Ⅰ1-1; drag the plug plate Ⅰ1-2 to move to the right, and the moving distance is equal to the distance between the adjacent plug plate washer hole Ⅰ1-2-2 and the plug plate washer hole Ⅱ1-2-3. At this time, the center of the screw rod corresponds one by one with the washer hole Ⅰ1-3-1 of the support plate Ⅰ1-3, the plug plate washer hole Ⅱ1-2-3 of the plug plate Ⅰ1-2, the washer positioning hole Ⅰ1-1-1 of the positioning plate Ⅰ1-1, the washer positioning hole Ⅱ4-1 of the switching positioning plate 4, the flat washer hole 2-1-2 of the positioning plate Ⅱ2-1, the plug plate washer hole Ⅳ2-2-3 of the plug plate Ⅱ2-2 and the washer hole Ⅱ2-3-1 of the support plate Ⅱ2-3. Ninety-six flat washers are sequentially passed through the insert plate washer hole II1-2-3 on the insert plate I1-2, the washer hole I1-3-1 of the support plate I1-3, the washer positioning hole II4-1 of the switching positioning plate 4, the flat washer hole 2-1-2 of the positioning plate II2-1, the insert plate washer hole IV2-2-3 of the insert plate II2-2 and the washer hole II2-3-1 on the support plate II2-3, and are respectively sleeved on the ninety-six screw rods and fall along the screw rods, completing the process of wearing the flat washers;

[0068] Step 4: Remove the screw assembly:

[0069] The slider 7 on the starting guide rail 6 drives the positioning plate Ⅰ1-1, the plug plate Ⅰ1-2, the support plate Ⅰ1-3, the switching positioning plate 4, the positioning plate Ⅱ2-1, the plug plate Ⅱ2-2 and the support plate Ⅱ2-3 of the flat washer assembly layer 1 to move upwards respectively to remove the screw assembly; when using the screw after completing the process of inserting the spring washer and the flat washer, pinch the screw rod with your hand to take out the screw assembly with the spring washer and the flat washer on the cylindrical body 3-2-1 of the screw support plate 3-2 through the through hole 3-1-1 of the screw base plate 3-1 for use.

[0070] For the sizes of screws of different models, the sizes of pan head screws of GB / T818-2016 standard, small washers of grade A of GB / T848-2016 standard and spring washers of GB / T93-87 standard are as follows, see Table 1.

[0071] Table 1

[0072]

[0073] For screw sizes of different models, the diameters of the through hole 3-1-1 and the cylindrical body 3-2-1 are different, see Table 2.

[0074] Table 2

[0075]

[0076] For different types of screws, the dimensions of the opening slot 1-2-1 are shown in Table 3.

[0077] Table 3

[0078]

[0079] The thickness of the positioning plate Ⅰ1-1, the plug plate Ⅰ1-2, the support plate Ⅰ1-3, the switching positioning plate 4, the positioning plate Ⅱ2-1, the plug plate Ⅱ2-2, the support plate Ⅱ2-3, the strip sandwich plate Ⅰ1-4 and the strip sandwich plate Ⅱ2-4 are determined according to different screw models, see Table 4.

[0080] Table 4

[0081]

[0082] The hole diameters of washer positioning hole 1-1-1, plug plate washer hole Ⅰ1-2-2, plug plate washer hole Ⅱ1-2-3, washer hole Ⅰ1-3-1, spring washer hole 2-1-1, flat washer hole 2-1-2, plug plate washer hole Ⅲ2-2-2, plug plate washer hole Ⅳ2-2-3, washer hole Ⅱ2-3-1 and washer positioning hole Ⅱ4-1 are determined according to different screw models, see Table 5.

[0083] Table 5

[0084]

[0085] Take M2.5 standard screws, M2.5 standard spring washers and M2.5 flat washers grade A as examples. The thickness of the positioning plate Ⅰ1-1 is 0.5mm (less than the A-level thickness of the M2.5 flat washer, ensuring that only one flat washer can be accommodated in the washer positioning hole Ⅰ1-1-1); the thickness of the switching positioning plate 4 is 0.15mm (less than the thickness of the M2.5 standard spring washer, ensuring that only one spring washer can be accommodated in the washer positioning hole Ⅱ4-1), and the thickness of the positioning plate Ⅱ2-1 is 0.65mm (the same as the thickness of the M2.5 standard spring washer, ensuring that only one spring washer can be accommodated in each spring washer hole 2-1-1 of the positioning plate Ⅱ2-1); the thickness of the plug-in plate Ⅰ1-2 and the plug-in plate Ⅱ2-2 is 0.5mm; the thickness of the support plate Ⅰ and the support plate Ⅱ2-3 is 1mm, and the thickness of the strip sandwich plate Ⅰ1-4 and the strip sandwich plate Ⅱ2-4 is 1.5mm (greater than the thickness of the plug-in plate Ⅰ1-2 and the plug-in plate Ⅱ2-2, ensuring that the plug-in plate Ⅰ1-2 and the plug-in plate Ⅱ2-2 can be pulled in the tooling). The apertures of the washer positioning hole Ⅰ1-1-1, the flat washer hole 2-1-2 and the washer positioning hole Ⅱ4-1 are 5+0.10 +0.05mm; the apertures of the plug-in plate washer hole Ⅰ1-2-2 and the plug-in plate washer hole Ⅲ2-2-2 are 3.5+0.10 +0.05mm; the apertures of the spring washer hole 2-1-1 are 4.4+0.10 +0.05mm; the apertures of the plug-in plate washer hole Ⅱ1-2-3, the washer hole Ⅰ1-3-1, the plug-in plate washer hole Ⅳ2-2-3 and the washer hole Ⅱ2-3-1 are 5.2+0.10 +0.05mm; the widths of the open slots Ⅰ1-2-1 and Ⅱ2-2-1 are 2.7mm (larger than the screw rod diameter).

[0086] In the tooling screw layer structure, the screw base plate 3-1 is 8 mm thick, and an array of ninety-six through holes 3-1-1 is provided, with a hole diameter of 5 mm. The upper edge of each through hole 3-1-1 is chamfered with a diameter of 1 mm.

[0087] The thickness of the screw support plate 3-2 is 4 mm, the diameter of the cylindrical body 3-2-1 is 5 mm, and the position corresponds one-to-one with the through hole 3-1-1.

[0088] The utility model is applicable to standard pan head screws GB / T818-2016, small washers of grade A GB / T848-2016, and standard spring washers GB / T93-1987 or non-standard customized combinations of M2, M2.5, M3, and M4. This application uses M2.5 standard pan head screws, flat washers, and spring washers as examples for illustration and explanation. The combination of screws, spring washers, and flat washers of other sizes can be used to change the size of the structural parts, and the principle is the same.

Claims

1. A tool for semi-automatic batch assembly of screw assemblies, comprising a flat washer assembly layer (1), a spring washer assembly layer (2), a screw assembly layer (3) and a switching positioning plate (4), wherein the spring washer assembly layer (2) is arranged above the screw assembly layer (3), the switching positioning plate (4) is arranged above the spring washer assembly layer (2) via a pressing sheet (9), and the flat washer assembly layer (1) is arranged above the switching positioning plate (4), characterized in that: It also includes a vibration device (5), a guide rail (6), a slider (7) and a frame (8), wherein the frame (8) is arranged on the vibration device (5), the screw assembly layer (3) is arranged in the middle of the bottom (8-1) of the frame (8), the two guide rails (6) are respectively arranged vertically in the middle of the front and rear sides of the frame (8), and two sliders (7) are arranged on each guide rail (6), the upper two sliders (7) are respectively arranged in the middle of the strip sandwich plate I (1-4) on both sides of the flat washer assembly layer (1), and the lower two sliders (7) are respectively arranged in the middle of the strip sandwich plate II (2-4) on both sides of the spring washer assembly layer (2).

2. A tool for semi-automatic batch assembly of screw components as claimed in claim 1, characterized in that: It also includes a flat washer frame (1-5), a spring washer frame (2-5), a screw frame (3-5) and a frame (8), the bottom ends of the vibration device (5) and the two guide rails (6) are arranged at the bottom (8-1) of the frame (8), the flat washer frame (1-5), the spring washer frame (2-5) and the screw frame (3-5) are all arranged on the column (8-2) of the frame (8), the upper end surface of the positioning plate I (1-1) is at the same height as the lower end surface of the flat washer frame (1-5), and the upper end surface of the switching positioning plate (4) is at the same height as the lower end surface of the spring washer frame The lower end faces of the screw base plate (3-1) and the screw frame (3-5) are at the same height, and the upper end face of the screw base plate (3-1) and the lower end face of the screw frame (3-5) are at the same height; a flat washer layer notch I (1-5-1) and a flat washer layer notch II (1-5-2) are provided on the front and rear sides of the flat washer frame (1-5); a spring layer notch I (2-5-1) and a spring layer notch II (2-5-2) are provided on the front and rear sides of the spring washer frame (2-5); and a screw layer notch I (3-5-1) and a screw layer notch II (3-5-2) are provided on the front and rear sides of the screw frame (3-5).

3. A method for using the semi-automatic batch assembly tool of screw components according to claim 1, characterized in that: The following steps are involved: Step 1, arrange the screw assembly: Sprinkle excess flat washers onto the positioning plate I (1-1) through the space above the flat washer assembly layer (1), sprinkle excess spring washers onto the switching positioning plate (4) through the space above the spring washer assembly layer (2), sprinkle excess screws onto the screw base plate (3-1) through the space above the screw assembly layer (3), start the vibration device (5), and the vibration device (5) drives the tooling to vibrate so that each positioning hole I (1-1-1) accommodates a flat washer, each spring washer hole (2-1-1) accommodates a spring washer, and each through hole (3-1-1) is provided with a screw arrangement; start the slider (7) on the guide rail (6) to drive the flat washer assembly layer (1) and the spring washer assembly layer (2) to move downward by 2 cm, and use a brush to sweep away excess screw parts; The screw base plate (3-1) is tightly attached to the screw support plate (3-2), and at this time, the screw nuts of the ninety-six through holes (3-1-1) correspond to the ninety-six cylindrical bodies (3-2-1) of the screw support plate (3-2) one by one; the screw nuts in the ninety-six through holes (3-1-1) fall on the ninety-six cylindrical bodies (3-2-1) respectively, forming a directional array of screws, and the arrangement process of the screw assembly is completed; Step 2: Wear the spring washer: The slider (7) on the start guide rail (6) drives the switching positioning plate (4), the positioning plate II (2-1) of the spring washer assembly layer (2), the plug plate II (2-2) and the support plate II (2-3) to move downwards respectively until the lower surface of the support plate II (2-3) is in close contact with the screw base plate (3-1); at this time, the ninety-six screw rods pass through the washer hole II (2-3-1) of the support plate II (2-3) and the plug plate washer hole III (2-2-2) of the plug plate II (2-2) and extend into the spring washer in the spring washer hole (2-1-1) of the positioning plate II (2-1), so that the screw rods penetrate the spring washer; at this time, the center of the screw rods is aligned with the spring washer hole (2-1-1) of the positioning plate II (2-1), the plug plate washer hole III (2-2-2) of the plug plate II (2-2) and the support plate II (2-3). The washer holes II (2-3-1) correspond one to one; the plug plate II (2-2) is dragged to the right, and the moving distance is equal to the distance between the adjacent plug plate washer holes III (2-2-2) and plug plate washer holes IV (2-2-3). At this time, the center of the screw rod corresponds one to one with the spring washer hole (2-1-1) of the positioning plate II (2-1), the washer hole IV (2-2-3) of the plug plate II (2-2) and the washer hole II (2-3-1) of the support plate II (2-3). Ninety-six spring washers are sequentially passed through the spring washer hole (2-1-1) on the positioning plate II (2-1), the washer positioning hole IV (2-2-3) of the plug plate II (2-2) and the washer hole II (2-3-1) of the support plate II (2-3), and are respectively sleeved on the ninety-six screw rods and fall along the screw rods, completing the process of threading the spring washers; Step 3: Put on the flat washer: Loosen the pressing piece (9) fixing the switching positioning plate (4) and the positioning plate II (2-1), drag the positioning plate II (2-1) forward, the moving distance is equal to the distance between the adjacent spring washer hole (2-1-1) and the flat washer hole II (2-1-2), and then tighten the pressing piece (9); at this time, the center of the screw rod is aligned with the positioning hole II (4-1) of the switching positioning plate (4), the flat washer hole II (2-1-2) of the positioning plate II (2-1), the insert washer hole IV (2-2-3) of the insert plate II (2-2), and the washer hole II (2-3-1) of the support plate II (2-3). One-to-one correspondence; the slider (7) on the start guide rail (6) drives the positioning plate Ⅰ (1-1), the plug plate Ⅰ (1-2), and the support plate Ⅰ (1-3) of the flat washer assembly layer (1) to move downwards respectively, until the lower surface of the support plate Ⅰ (1-3) is tightly attached to the switching positioning plate (4); at this time, the center of the screw rod corresponds to the flat washer hole Ⅰ (1-3-1) of the support plate Ⅰ (1-3), the plug plate washer hole Ⅰ (1-2-2) of the plug plate Ⅰ (1-2), and the positioning hole Ⅰ (1-1-1) of the positioning plate Ⅰ (1-1); drag the plug plate Ⅰ (1-2) to the right, and move the distance is equal to the distance between the adjacent plug plate washer hole Ⅰ (1-2-2) and the plug plate washer hole Ⅱ (1-2-3); at this time, the center of the screw rod is aligned with the flat washer hole Ⅰ (1-3-1) of the support plate Ⅰ (1-3), the plug plate washer hole Ⅱ (1-2-3) of the plug plate Ⅰ (1-2) and the positioning hole Ⅰ (1-1-1) of the positioning plate Ⅰ (1-1), the positioning hole Ⅱ (4-1) of the switching positioning plate (4), the flat washer hole Ⅱ (2-1-2) of the positioning plate Ⅱ (2-1), the plug plate washer hole Ⅳ (2-2-3) of the plug plate Ⅱ (2-2) and the support plate Ⅱ (2-3) The washer holes II (2-3-1) correspond one to one; ninety-six flat washers are sequentially passed through the plug plate washer hole II (1-2-3) on the plug plate I (1-2), the flat washer hole I (1-3-1) of the support plate I (1-3), the positioning hole II (4-1) of the switching positioning plate (4), the flat washer hole II (2-1-2) of the positioning plate II (2-1), the plug plate washer hole IV (2-2-3) of the plug plate II (2-2) and the washer hole II (2-3-1) on the support plate II (2-3), and are respectively sleeved on the ninety-six screw rods and fall along the screw rods, thereby completing the process of threading the flat washers; The fourth step is to take out the screw assembly: the slider (7) on the start guide rail (6) drives the positioning plate I (1-1), the plug plate I (1-2), the support plate I (1-3), the switching positioning plate (4) of the flat washer assembly layer (1), the positioning plate II (2-1), the plug plate II (2-2), and the support plate II (2-3) of the spring washer assembly layer (2) to move upwards respectively, so as to take out the screw assembly; when the screw is used after the process of inserting the spring washer and the flat washer is completed, the screw rod can be pinched by hand to take out the screw assembly with the spring washer and the flat washer on the cylindrical body (3-2-1) of the screw support plate (3-2) through the through hole (3-1-1) of the screw base plate (3-1) for use.

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