A production method for hexagonal knurled assembly

Abstract

The present invention relates to the field of fastener production, and discloses a production method of a hexagonal knurled assembly: a steel wire coil is unwound through a pay-off stand, and is transported to a cold heading machine through a straightening mechanism; a blank is formed by cold heading through a cold heading machine, and the end of the nut away from the connecting rod has a multi-angle driving groove; the blank is placed in a first vibrating screen machine, and a first unloading track placed obliquely is arranged on the first vibrating screen machine; a spring washer is placed in a second vibrating screen machine, and a second unloading track placed obliquely is connected to the second vibrating screen machine; a flat washer is placed in a third vibrating screen machine, and a third unloading track placed obliquely is connected to the third vibrating screen machine; the mounting plate rotates, and the blank is sequentially sleeved with a spring washer and a flat washer to form a secondary material; a thread rolling machine forms a spiral pattern on the connecting rod and obtains a semi-finished product, and the outer diameter of the spiral pattern is greater than the inner diameter of the flat washer. The present invention has the following advantages and effects: the scheme utilizes a new mechanical structure to achieve the purpose of improving production efficiency.

Description

Technical Field

[0001] The invention relates to a production method of a hexagonal knurled assembly. Background Art

[0002] Bolt connection is widely used in automobile, machinery, construction and other industries, and is an important connection method. Bolts are commonly used fasteners in mechanical structures and building components. In most cases, bolts are manufactured and processed in accordance with national standards or industry standards. Bolts sold on the market and bolts used in the machinery industry are mostly standard parts. There are many types of bolts, but in most cases they are distinguished by the diameter of the screw and the shape of the bolt head. The thread of the screw can be divided into coarse thread, fine thread, British thread and non-standard thread.

[0003] At present, a Chinese patent with announcement number CN205371222U discloses a hexagon socket bolt, which includes a protective cover, a connecting strip, a bolt cap, a washer, an externally threaded screw, a hexagon socket hole, and an external hexagon socket plug. The lower end face of the bolt cap is connected to the upper end face of the screw, and the upper end face of the bolt cap is provided with a hexagon socket hole. One end of the protective cover is fixed to the bolt cap through the external hexagon socket plug, the protective cover is connected to the washer through the connecting strip, and the washer is installed on the lower end face of the bolt cap through the externally threaded screw.

[0004] This hexagon socket bolt has a simple structure, but in actual use, in order to fix the hexagon socket bolt on the equipment and prevent it from falling out, it is often necessary to set a spring washer and a flat washer on the external threaded screw. When the external threaded screw is facing downward, the spring washer and the flat washer are easily removed from the external threaded screw due to the action of gravity, which makes operation inconvenient and seriously affects production efficiency. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a method for producing a hexagonal knurled assembly, in which a spring washer and a flat washer are placed between the spiral pattern and the nut, so that the spring washer and the flat washer are not easy to fall out, thereby achieving the purpose of improving production efficiency.

[0006] To achieve the above object, the present invention provides the following technical solution: a method for producing a hexagonal knurled assembly, comprising the following steps:

[0007] Step 1: The wire coil is unwound through the pay-off stand and transported to the cold heading machine through the straightening mechanism;

[0008] Step 2: cold forging a blank by a cold forging machine, wherein the blank comprises a nut and a connecting rod fixed on the nut, and an end of the nut away from the connecting rod has a polygonal driving groove;

[0009] Step 3: placing the blank in a first vibrating screen machine, and setting an inclined first unloading track on the first vibrating screen machine;

[0010] Step 4: Place the spring pad in the second vibrating screen machine, and connect the second tilted feeding track to the second vibrating screen machine;

[0011] Step 5: Place the flat pad in the third vibrating screen machine, and connect the third unloading track placed obliquely to the third vibrating screen machine;

[0012] Step 6: Drive the mounting plate to rotate, the blank rotates with the mounting plate and is covered with spring washers and flat washers in sequence to form secondary material;

[0013] Step 7: Inspect the defective materials through the blanking inspection mechanism;

[0014] Step 8: Forming a spiral pattern on the connecting rod by a thread rolling machine to obtain a semi-finished product, wherein the outer diameter of the spiral pattern is larger than the inner diameter of the flat washer;

[0015] Step 9: The semi-finished product is knurled by a knurling machine to obtain a finished assembly.

[0016] By adopting the above technical scheme, the steel wire coil is unwound and straightened and then input into the cold heading machine, and the cold heading machine is operated to form a blank having a nut and a connecting rod, the blank is placed in the first vibrating screen machine and moved down along the first feeding track, the spring washer is placed in the second vibrating screen machine and moved down along the second feeding track, the flat washer is placed in the third vibrating screen machine and moved down along the third feeding track, and when the mounting plate rotates, the blank is driven to move in the direction close to the spring washer, so that the spring washer is sleeved on the connecting rod, the blank moves in the direction close to the flat washer as the mounting plate rotates, the flat washer is sleeved on the connecting rod to form a defective material, and then the defective material is inspected by a blanking inspection mechanism, and then a spiral pattern is rubbed out on the connecting rod by a thread rolling machine to obtain a semi-finished product, the outer diameter of the spiral pattern is larger than the inner diameter of the flat washer, so that the flat washer and the spring washer are not easy to fall off from the connecting rod, and then the nut is knurled to obtain a finished assembly, which is easy to operate and effectively improves production efficiency.

[0017] The present invention is further configured as follows: the straightening mechanism includes a support plate, a straightening wheel and a drive positioning structure; the straightening wheel is slidably connected to the support plate via a slider; the straightening wheel is rotatably connected to the slider; a clamping cavity for placing the steel wire is formed between adjacent straightening wheels; the slider moves toward or away from the clamping cavity via the drive positioning structure.

[0018] By adopting the above technical solution, the steel wire is passed through the clamping cavity, and the driving positioning structure pushes the straightening wheel through the slider to move towards the direction close to the steel wire and contact the steel wire. When the straightening wheel rotates, pressure is applied to the steel wire to straighten it and input it into the cold heading machine.

[0019] The present invention is further configured as follows: the drive positioning structure includes a transmission disk, a spiral groove, a Z-shaped rod and a fixing bolt, the transmission disk is rotatably connected to the support plate, the spiral groove is opened on the surface of the transmission disk, the Z-shaped rod is placed in the spiral groove and fixedly connected to the slider, and the fixing bolt is threadedly connected to the support plate and interferes with the slider.

[0020] By adopting the above technical solution, the transmission disk is rotated, and the inner wall of the spiral groove applies a resistance force to the Z-shaped rod, so that the Z-shaped rod drives the slider to move towards or away from the transmission disk. After the straightening wheel contacts the steel wire, the fixing bolt is rotated to make the fixing bolt contact the slider. The friction force generated fixes the slider, which is easy to operate and can adapt to steel wires with different outer diameters.

[0021] The present invention is further configured as follows: the sliding block is connected with a telescopic positioning rod, the telescopic positioning rod is rotatably connected with a pressure wheel, and the pressure wheel is placed in the clamping cavity and contacts the steel wire.

[0022] By adopting the above technical solution, the telescopic positioning rod drives the pressure wheel to move, so that the pressure wheel contacts the steel wire. Through the joint action with the straightening wheel, the steel wire can be straightened in four directions of front, back, left and right, thereby improving the straightening degree of the steel wire and improving production quality.

[0023] The present invention is further configured as follows: a plurality of cover plates for interfering with nuts are hingedly connected on the installation plate, an interfering block is fixed to one end of the first unloading track away from the first vibrating screen machine, and an interfering inclined surface for interfering with the cover plates is provided on the interfering block.

[0024] By adopting the above technical solution, the cover plate moves toward the direction close to the blank and collides with the interference slope. The cover plate flips upward along the hinge. As the mounting plate further rotates, the cover plate separates from the interference slope and is covered on the nut by gravity, making it difficult for the blank to fall off the mounting plate and having higher stability.

[0025] The present invention is further configured as follows: the first unloading track includes a first guide rail and a first connecting plate for contacting with a nut, the first guide rail is provided with a first guide groove for placing a connecting rod, and the first connecting plate is connected to the first guide rail through an adjustment component.

[0026] By adopting the above technical solution, the connecting rod slides downward along the first guide groove due to the action of gravity, and the resistance of the first connecting plate makes it difficult for the blank to fall out of the first guide rail. When a blank is stuck in the first guide groove and cannot move downward, the first connecting plate is driven up by the adjusting component, which facilitates the removal of the blank and improves production efficiency.

[0027] The present invention is further configured as follows: the adjustment component includes a positioning plate, a positioning sleeve, a positioning hole, a sliding groove, a driving rod, a first sliding block, a first inclined surface, a second sliding block, a second inclined surface, a third inclined surface and a sliding rod, the positioning plate is fixed on the first guide rail, the positioning hole is opened on the positioning plate, the positioning sleeve is fixed in the positioning hole, the sliding groove is opened on the side wall of the positioning sleeve, the driving rod is slidably connected to the positioning sleeve through a guide block and is fixedly connected to the first sliding block, the first sliding block is rotatably connected to the first connecting plate, the second inclined surface is opened on the second sliding block and is used to interfere with the first inclined surface, the third inclined surface is opened at the end of the positioning sleeve away from the driving rod, the sliding rod is fixed on the side wall of the second sliding block and is slidably connected to the sliding groove or embedded in the third inclined surface, and the first connecting plate is connected to the positioning plate through an elastic member.

[0028] By adopting the above technical solution, a downward pressure is applied to the driving rod, so that the driving rod drives the first slider to move in a direction close to the second slider, the first inclined surface conflicts with the second inclined surface, and the second slider is led out of the positioning sleeve, and the second slider is rotated by the guiding effect of the first inclined surface and the second inclined surface, and then the slide bar corresponds to the slide groove, and the driving rod is released, and the slide bar is moved along the slide groove in a direction close to the first slider by the elastic force of the elastic member, at this time, the distance between the first connecting plate and the first guide rail increases, which is convenient for taking the blank out of the first guide rail; the driving rod is pressed again, the first inclined surface conflicts with the second inclined surface, and the second slider is led out of the positioning sleeve, and the second slider is rotated by the guiding effect of the first inclined surface and the second inclined surface, and at the same time, the slide bar is led out of the slide groove and corresponds to the third inclined surface, and after the driving rod is released, the slide bar is embedded in the third inclined surface by the elastic force of the elastic member, and at this time, the distance between the first connecting plate and the first guide rail is small, which can limit the blank and is not easy to escape from the first guide rail, and the operation is simple, and the production efficiency is effectively improved.

[0029] The present invention is further configured as follows: the drop inspection mechanism includes an inclined guide rail, a material discharge trough, a contact plate and a mounting plate, one end of the inclined guide rail is connected to the mounting plate, the material discharge trough is opened in the middle of the inclined guide rail, the mounting plate is fixed on the inclined guide rail, the contact plate is connected to the mounting plate through a height adjustment mechanism, and the contact plate contacts the nut.

[0030] By adopting the above technical scheme, the secondary material moves along the length direction of the inclined guide rail due to the action of gravity. When the secondary material is not covered with spring washers and / or flat washers, the height of the nut is relatively low and cannot interfere with the contact plate, and the secondary material falls from the material discharge chute; when the secondary material is covered with spring washers and flat washers, the height of the nut is relatively high and can interfere with the contact plate, and cannot fall from the material discharge chute, thereby achieving the effect of automatic screening, with a simple structure and easy operation.

[0031] The present invention is further configured as follows: the height adjustment mechanism includes a spiral rod, a spiral sleeve and a limit rod, the limit rod is fixed on the outer wall of the spiral sleeve and is slidably connected to the mounting plate, the spiral rod is threadedly connected to the spiral sleeve, the end of the spiral sleeve away from the spiral rod is connected to the resistance plate, and the spiral rod is connected to a handle through a transmission mechanism.

[0032] By adopting the above technical solution, the spiral rod rotates, and the spiral sleeve drives the resistance plate to move up and down through the pushing action of the thread and the guiding action of the limit rod. It can adapt to scrap materials of different sizes and heights and has high practicality. At the same time, the position of the resistance plate can be locked through the self-locking property of the thread.

[0033] The present invention is further configured as follows: the transmission mechanism includes a first gear and a second gear both rotatably connected to the mounting plate, the first gear is connected to the screw rod, the second gear is connected to the handle, the first gear is meshed with the second gear, and the outer diameter of the first gear is greater than the outer diameter of the second gear.

[0034] By adopting the above technical solution, the handle drives the second gear to rotate, so that the second gear drives the first gear to rotate, and then the first gear drives the spiral rod to rotate. Since the outer diameter of the first gear is smaller than the outer diameter of the second gear, it is more labor-saving for the second gear to drive the first gear to rotate, and at the same time, the rotation speed of the spiral rod can be better adjusted, which is convenient for accurately adjusting the height of the contact plate.

[0035] In summary, the present invention has the following beneficial effects:

[0036] After being straightened by the straightening machine, the steel wire enters the cold heading machine for cold heading operation to obtain a blank, which is then placed in the first vibrating screen machine and moved downward through the first feeding track, the spring washer is placed in the second vibrating screen machine and moved downward through the second feeding track, the flat washer is placed in the third vibrating screen machine and moved downward through the third feeding track, and after the mounting plate rotates, the blank is driven to pass through the second feeding track and the third feeding track in turn, the spring washer and the flat washer are put on, and then the spiral pattern is rolled out through a thread rolling machine, and the outer diameter of the spiral pattern is made larger than the inner diameter of the flat washer, so that the flat washer and the spring washer can be stably placed between the nut and the spiral pattern, and the operation is easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the present invention;

[0038] Figure 2 for Figure 1 A magnified image of point A;

[0039] Figure 3 To reflect the structural diagram of the first vibrating screen machine;

[0040] Figure 4To illustrate the structural diagram of the first unloading track;

[0041] Figure 5 for Figure 4 The enlarged view of point B;

[0042] Figure 6 A schematic diagram showing the structure of the regulating component;

[0043] Figure 7 To reflect the structural diagram of the installation disk;

[0044] Figure 8 for Figure 3 Enlarged view of point C;

[0045] Fig. 9 Schematic diagram of the structure of the finished assembly.

[0046] 1. Pay-off frame; 11. Frame; 12. Support block; 13. S-shaped support rod; 2. Straightening mechanism; 21. Support plate; 22. Straightening wheel; 23. Drive positioning structure; 24. Clamping cavity; 25. Fixing rod; 26. Limiting groove; 31. Transmission plate; 32. Spiral groove; 33. Z-shaped rod; 34. Telescopic positioning rod; 35. Inner rod; 36. Sleeve; 37. Pressing wheel; 38. Cold heading machine; 41. First vibrating screen machine; 42. Second vibrating screen machine; 43. Third vibrating screen machine; 5. Adjusting assembly; 51. Positioning plate; 511. Elastic member; 52. Positioning sleeve; 53. Positioning hole; 54. Slide groove; 55. Drive rod; 551. Guide block; 56. First slider; 561. First inclined plane; 57. Second slider; 571. Second inclined plane; 58. Third inclined plane; 59. Slide rod; 61. First material unloading track; 611. First guide rail; 612. First connecting plate; 62. Second material unloading track; 621. Second guide rail; 622. Second connecting plate; 63. Third material unloading track; 631. Third guide rail; 632. Third connecting plate; 7. Mounting plate; 70. Placement groove; 71. Cover plate; 72. Interference block; 721. Interference slope; 73. Positioning frame; 731. Mounting groove; 8. Material drop inspection mechanism; 81. Inclined guide rail; 82. Material unloading trough; 83. Interference plate; 84. Mounting plate; 85. Height adjustment mechanism; 851. Screw rod; 852. Screw sleeve; 853. Limit rod; 86. Transmission mechanism; 861. First gear; 862. Second gear; 87. Handle; 9. Level adjustment mechanism; 91. Adjustment bolt; 92. Adjustment groove; 100. Thread rolling machine. DETAILED DESCRIPTION

[0047] The present invention will be further described with reference to the accompanying drawings.

[0048] like Figure 1 As shown, a method for producing a hexagonal knurled assembly comprises the following steps:

[0049] Step 1: The steel wire coil is unwound through the pay-off stand 1, and is transported to the cold heading machine 38 through the straightening mechanism 2;

[0050] Step 2: cold forging a blank through a cold forging machine 38, the blank comprising a nut integrally connected to a connecting rod on the nut, the nut having a polygonal driving groove at one end away from the connecting rod, the cross section of the polygonal driving groove being a regular hexagon, and an external hexagonal wrench being able to be embedded in the polygonal driving groove;

[0051] Step 3: placing a large number of blanks in the first vibrating screen machine 41, setting an inclined first unloading track 61 on the first vibrating screen machine 41, and after the first vibrating screen machine 41 is started, placing a plurality of blanks vertically and being able to move downward along the first unloading track 61 in sequence;

[0052] Step 4: Place a large number of spring pads in the second vibrating screen 42, and connect the second tilted unloading track 62 (see Figure 3 ), the spring pad is vibrated by the second vibrating screen machine 42, so that the spring pad is placed vertically and moves along the second unloading track 62 (see Figure 3 ) move down;

[0053] Step 5: Place a large number of flat pads in the third vibrating screen 43, connect the third diagonally placed feeding track 63 to the third vibrating screen 43, and the flat pads are placed vertically and move down along the third feeding track 63 in sequence through the vibration of the third vibrating screen 43;

[0054] Step 6: The mounting plate 7 is driven by the motor and the reducer to rotate, and the blank rotates with the mounting plate 7 and is sequentially covered with spring washers and flat washers to form secondary material;

[0055] Step 7: inspect the defective materials through the blanking inspection mechanism 8, remove the defective materials without spring washers and / or flat washers, and leave the defective materials with spring washers and flat washers;

[0056] Step 8: Use the thread rolling machine 100 to roll out a spiral pattern on the connecting rod to obtain a semi-finished product. The outer diameter of the spiral pattern is larger than the inner diameter of the flat washer, so that the flat washer and the spring washer cannot be removed from between the spiral pattern and the nut.

[0057] Step 9: The semi-finished product is knurled on the outer wall of the nut by a knurling machine (not shown in the figure) to obtain a finished assembly (see Fig. 9 ).

[0058] The pay-off frame 1 includes a frame body 11 and a support block 12 rotatably connected to the frame body 11 through a bearing, and a plurality of S-shaped support rods 13 are fixed to the support block 12. The support block 12 is cylindrical, and the plurality of S-shaped support rods 13 are evenly distributed along the axis of the support block 12. The wire coil is sleeved on the S-shaped support rod 13 and supported by the S-shaped support rod 13.

[0059] A straightening mechanism 2 is provided between the pay-off stand 1 and the cold heading machine 38. Figure 2 As shown, the straightening mechanism 2 includes a support plate 21, a straightening wheel 22 and a driving positioning structure 23. The support plate 21 is placed horizontally and welded on the cold heading machine 38. A plurality of straightening wheels 22 are arranged on the upper surface of the support plate 21, and the plurality of straightening wheels 22 are distributed in a W shape, and a clamping cavity 24 for placing the steel wire is formed between two adjacent straightening wheels 22. A plurality of limiting grooves 26 are provided on the support plate 21, and a slider is slidably connected in the limiting groove 26, and a cylindrical fixed rod 25 is integrally arranged on the slider. The straightening wheel 22 is sleeved on the fixed rod 25 and is rotatably connected to the fixed rod 25 through a bearing.

[0060] The driving positioning structure 23 includes a transmission disc 31, a spiral groove 32, a Z-shaped rod 33 and a fixing bolt. The transmission disc 31 is rotatably connected to the support plate 21, and anti-skid grooves 54 are evenly provided on the outer wall of the transmission disc 31. The spiral groove 32 is provided on the upper end surface of the transmission disc 31. The spiral groove 32 is arranged in an Archimedean spiral. The Z-shaped rod 33 is placed in the spiral groove 32 and fixedly connected to the slider. The positioning bolt is a bolt, which is threadedly connected to the support plate 21 and is used to contact the side wall of the slider, and the stability of the positioning of the slider is further improved through friction.

[0061] A telescopic positioning rod 34 is provided at one end of the fixed rod 25 away from the slider. The telescopic positioning rod 34 includes an inner rod 35, a sleeve 36 and a spring. The sleeve 36 arranged in an L shape is fixed to the slider, one end of the spring is fixed to the inner rod 35, and the other end is fixed to the sleeve 36, and the inner rod 35 is slidably connected to the sleeve 36. A pressure wheel 37 is rotatably connected to one end of the inner rod 35 away from the spring, and the pressure wheel 37 is located above the clamping cavity 24. The spring always applies elastic force to the inner rod 35, so that the pressure wheel 37 can apply downward pressure to the steel wire to further straighten the steel wire.

[0062] The worker drives the transmission disk 31 to rotate by hand, and the inner wall of the spiral groove 32 contacts the Z-shaped rod 33, and the Z-shaped rod 33 drives the slider to move toward or away from the clamping cavity 24; at the same time, through the self-locking property of the spiral groove 32, when the steel wire applies a reaction force to the straightening wheel 22, the straightening wheel 22 is not easily displaced.

[0063] The straightened steel wire is conveyed to the cold heading machine 38 for cold heading operation to form a blank. The blank includes an integrally arranged nut and a connecting rod. The nut and the connecting rod are both arranged in a cylindrical shape. The nut and the connecting rod are arranged coaxially. A polygonal drive groove is formed at the end of the nut away from the connecting rod by the cold heading operation of the cold heading machine 38. The cross section of the polygonal drive groove is arranged in a regular hexagonal shape. An external hexagonal wrench can be embedded in the polygonal drive groove.

[0064] See Figure 3 , a large amount of blanks are placed in the first vibrating screen machine 41, a large amount of spring pads are placed in the second vibrating screen machine 42, and a large amount of flat pads are placed in the third vibrating screen machine 43. Figure 4 The first unloading track 61 includes a first guide rail 611 and a first connecting plate 612. An adjustment assembly 5 is provided between the first guide rail 611 and the first connecting plate 612. The first guide rail 611 is placed obliquely, with the upper end connected to the outlet of the first vibrating screen 41 and the lower end close to the mounting plate 7 (see FIG. Figure 3 ) direction.

[0065] like Figure 5 and Figure 6 As shown, the adjustment assembly 5 includes a positioning plate 51, a positioning sleeve 52, a positioning hole 53, a slide 54, a driving rod 55, a first slider 56, a first inclined surface 561, a second slider 57, a second inclined surface 571, a third inclined surface 58 and a slide rod 59. The positioning plate 51 is arranged in an L shape, one end of which is fixed on the first guide rail 611, and the other end is placed above the first guide rail 611. The positioning hole 53 is provided on the upper surface of the positioning plate 51. The cylindrical positioning sleeve 52 is fixed in the positioning hole 53. The slide 54 is strip-shaped, provided on the side wall of the positioning sleeve 52, and arranged parallel to the positioning sleeve 52. The driving rod 55 is put into the positioning sleeve 52 from top to bottom, and a guide block 551 is fixed on the side wall of the driving rod 55, so that the driving rod 55 is slidably connected with the positioning sleeve 52 through the guide block 551. The upper end of the driving rod 55 extends out of the positioning hole 53, and the lower end is placed in the positioning sleeve 52 and fixedly connected with the first slider 56. The first inclined surface 561 is provided on the first slider 56. The second slider 57 is placed in the positioning sleeve 52, and a second inclined surface 571 is provided on the side facing the first slider 56. When the first inclined surface 561 and the second inclined surface 571 collide with each other, the first inclined surface 561 and the second inclined surface 571 are staggered. One end of the second slider 57 away from the second inclined surface 571 is slidably connected to the first connecting plate 612. The third inclined surface 58 is provided at one end of the positioning sleeve 52 away from the driving rod 55, and the sliding rod 59 is fixed on the side wall of the second slider 57 and slidably connected to the slide groove 54 or embedded in the third inclined surface 58. The elastic member 511 is a spring, one end of which is fixed to the first connecting plate 612, and the other end is fixedly connected to the positioning plate 51. The elastic member 511 is a spring.

[0066] When a blank is stuck on the first guide rail 611 and cannot fall, the driving rod 55 is pressed, and the driving rod 55 drives the first slider 56 to move in the direction of the second slider 57 until the second slider 57 is ejected from the positioning sleeve 52. Through the misalignment of the first inclined surface 561 and the second inclined surface 571 and the elastic force of the elastic member 511, the first inclined surface 561 fits with the second inclined surface 571, so that the second slider 57 rotates at a certain angle in the positioning hole 53, so that the sliding rod 59 is separated from the third inclined surface 58 and corresponds to the sliding groove 54, and the driving rod 55 is released. Through the elastic force of the elastic member 511, the sliding rod 59 slides along the sliding groove 54. At the same time, the second slider 57 and the first connecting plate 612 move in the direction close to the first slider 56, and the distance between the first connecting plate 612 and the first guide rail 611 increases, which is convenient for taking out the blank stuck on the first guide rail 611. The driving rod 55 is pressed again, and the first slider 56 pushes the second slider 57 out of the positioning sleeve 52, and the first inclined surface 561 fits with the second inclined surface 571. The second slider 57 rotates a certain angle in the positioning hole 53 again. At this time, the slide bar 59 is corresponding to the third inclined surface 58 after being disengaged from the slide groove 54. The driving rod 55 is released, and the slide bar 59 is embedded in the third inclined surface 58 through the elastic force of the elastic member 511, so as to realize the positioning of the first connecting plate 612. At this time, the distance between the first positioning plate 51 and the first guide rail 611 is small, which can limit the blank and prevent the blank from falling off the first guide rail 611.

[0067] See Figure 3 The second unloading track 62 is tilted, including a second guide rail 621 and a second connecting plate 622 fixed on the second guide rail 621. One end of the second guide rail 621 is connected to the second vibrating screen 42, and the other end extends in the direction close to the mounting plate 7. A plurality of spring washers are arranged vertically and move in sequence along the second guide rail 621 in the direction close to the mounting plate 7. The third unloading track 63 is tilted, including a third guide rail 631 and a third connecting plate 632 fixed on the third guide rail 631. One end of the third guide rail 631 is connected to the third vibrating screen 43, and the other end extends in the direction close to the mounting plate 7. A plurality of flat washers are arranged vertically and move in sequence along the third guide rail 631 in the direction close to the mounting plate 7.

[0068] The mounting plate 7 is in the shape of a disk and is driven to rotate by a motor. The mounting plate 7 is located in a circular chamber surrounded by the first unloading track 61, the second unloading track 62 and the third unloading track 63. Along the rotation direction of the mounting plate 7, the second unloading track 62 is located between the first unloading track 61 and the third unloading track 63.

[0069] A plurality of cover plates 71 are hingedly connected to the upper end of the mounting plate 7, and the plurality of cover plates 71 are evenly distributed along the axis of the mounting plate 7. Figure 5 As shown, the first guide rail 611 is close to the mounting plate 7 (see Figure 3 ) is fixed with a resisting block 72 at one end, the resisting block 72 is located on the lower surface of the cover plate 71, and is provided with a resisting inclined surface 721. The mounting plate 7 (see Figure 3 ) is driven by a motor to rotate, and the cover plate 71 (see Figure 3 ) With Installation Disk 7 (see Figure 3 ) rotates, the cover plate 71 (see Figure 3 ) and the abutment slope 721, and turn over along the hinge, when the cover plate 71 (see Figure 3 ) is separated from the abutting inclined surface 721 and can be covered on the nut by gravity.

[0070] See Figure 7 The outer circumference of the mounting plate 7 is provided with a plurality of placement grooves 70 for placing the connecting rods, and the plurality of placement grooves 70 are evenly distributed along the axis of the mounting plate 7. Figure 3 As shown, a positioning frame 73 is provided below the mounting plate 7, and a mounting groove 731 is provided in the positioning frame 73 in an annular shape. The mounting groove 731 is located below the cover plate 71 and is aligned with the first guide rail 611 (see Figure 4 ), the second guide rail 621 and the third guide rail 631 are connected.

[0071] The blank moves down along the first guide rail 611 by gravity, and is embedded in the placement groove 70 and the installation groove 731. As the installation plate 7 rotates, the blank moves along the installation groove 731 by the contact of the placement groove 70, and moves toward the direction close to the spring washer. The positioning rod contacts the end face of the spring washer and passes through the inner ring of the spring washer. The spring washer is placed horizontally instead of vertically, and is sleeved on the connecting rod. The spring washer contacts the upper end face of the positioning frame 73. As the blank moves further, the connecting rod moves toward the direction close to the flat washer. The connecting rod contacts the end face of the flat washer and passes through the inner ring of the flat washer. The flat washer is placed horizontally instead of vertically, and is sleeved on the connecting rod. The spring washer is placed between the flat washer and the nut. After the blank is sleeved with the spring washer and the flat washer, it becomes a defective material.

[0072] See Figure 8 , on Installation Disk 7 (see Figure 3 ) is provided at the outlet of the thread rolling machine 100 (see FIG. 1 ). The thread rolling machine 100 (see FIG. 1 ) is provided with a material drop inspection mechanism 8 at the outlet of the thread rolling machine 100. The material drop inspection mechanism 8 includes an inclined guide rail 81, a material drop trough 82, a contact plate 83 and a mounting plate 84. The upper end of the inclined guide rail 81 is connected to the mounting plate 7, and the lower end is connected to the thread rolling machine 100 (see FIG. 1 ). Figure 3). The mounting plate 7 rotates to drive the secondary material to move toward the inclined guide rail 81. The end of the inclined guide rail 81 contacts the connecting rod, and the connecting rod is introduced onto the inclined guide rail 81, and the secondary material moves along the inclined guide rail 81 toward the thread rolling machine 100. The material discharge chute 82 is opened in the middle of the inclined guide rail 81, and the mounting plate 84 is fixed to the side wall of the inclined guide rail 81 by bolts, so that the material discharge chute 82 is placed between the inclined guide rail 81 and the mounting plate 84.

[0073] The mounting plate 84 is connected to the abutment plate 83 through a height adjustment mechanism 85. The height adjustment mechanism 85 includes a screw rod 851, a screw sleeve 852 and a limit rod 853. The limit rod 853 is fixed on the outer wall of the screw sleeve 852 and is slidably connected to the mounting plate 84. The screw rod 851 is inserted into the screw sleeve 852 and is threadedly connected to the screw sleeve 852. The screw rod 851 is rotatably connected to the mounting plate 84 through a bearing. The end of the screw sleeve 852 away from the screw rod 851 is connected to the abutment plate 83 through a horizontal adjustment mechanism 9. The screw rod 851 is connected to a handle 87 through a transmission mechanism 86. The transmission mechanism 86 includes a first gear 861 and a second gear 862. The first gear 861 and the second gear 862 are both bevel gears, and the outer diameter of the first gear 861 is greater than the outer diameter of the second gear 862. The first gear 861 is fixed to the end of the screw rod 851 away from the screw sleeve 852 and meshes with the second gear 862, and the second gear 862 is fixed to the handle 87. The handle 87 is rotatably connected to the mounting plate 84 .

[0074] The horizontal adjustment mechanism 9 includes an adjustment bolt 91 and an adjustment slot 92. The adjustment slot 92 is provided on the T-shaped contact plate 83. The adjustment bolt 91 passes through the adjustment slot 92 and is threadedly connected with the spiral sleeve 852. The adjustment bolt 91 contacts the contact plate 83, and the friction force generated positions the contact plate 83.

[0075] The secondary material moves along the length direction of the inclined guide rail 81, and there is a certain distance between the contact plate 83 and the upper end surface of the inclined guide rail 81. When the secondary material is not provided with a spring washer and / or a flat washer, the height of the nut is low and cannot come into contact with the contact plate 83, and falls from the material discharge chute 82; when the secondary material is provided with a spring washer and a flat washer, the height of the nut is high and can come into contact with the contact plate 83, and thus cannot fall from the material discharge chute 82 and enter the thread rolling machine 100 (see FIG. Figure 3 )middle.

[0076] The spatial position of the abutment plate 83 can be adjusted by the height adjustment mechanism 85 and the level adjustment mechanism 9 to adapt to nuts of different sizes and lengths, thus having high practicality.

[0077] See Figure 3The secondary material is rolled by the thread rolling machine 100 to form a spiral pattern on the connecting rod to become a semi-finished product. The outer diameter of the spiral pattern is larger than the inner diameter of the flat washer, so that the flat washer and the spring washer can be stably placed on the connecting rod and are not easy to fall off the connecting rod.

[0078] See Fig. 9 Finally, the semi-finished product is knurled by a knurling machine to form a knurling pattern on the outer wall of the nut to obtain a finished assembly. The operation is simple.

[0079] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A method for producing a hexagonal knurled assembly, characterized in that , comprising the following steps: Step 1: unwinding the wire coil through a wire unwinding rack (1), and conveying the wire to a cold heading machine (38) through a straightening mechanism (2); Step 2: cold heading the cold heading machine (38) to form a blank, wherein the blank comprises a nut and a connecting rod fixed on the nut, and the end of the nut away from the connecting rod has a multi-angle driving groove; Step 3: placing the blank in a first vibrating screen (41), and arranging an inclined first unloading track (61) on the first vibrating screen (41); Step 4: placing a spring washer in a second vibrating screen (42), and connecting the inclined second unloading track (62) to the second vibrating screen (42); Step 5: placing a flat washer in a third vibrating screen (43), and 43) is connected to a third unloading track (63) placed obliquely; Step 6: drive the mounting plate (7) to rotate, the blank rotates with the mounting plate (7) and is successively sleeved with spring washers and flat washers to form secondary materials; the mounting plate (7) is hinged with a plurality of cover plates (71) for contacting with nuts, and a contact block (72) is fixed to the end of the first unloading track (61) away from the first vibrating screen (41), and the contact block (72) is provided with a contact inclined surface (721) for contacting with the cover plate (71); the first unloading track (61) includes a first guide rail (611) and a first connecting plate (612) for contacting with the nut, the first guide rail (611) is provided with a first guide groove for placing a connecting rod, and the The first connecting plate (612) is connected to the first guide rail (611) through an adjusting component (5); the adjusting component (5) comprises a positioning plate (51), a positioning sleeve (52), a positioning hole (53), a slide groove (54), a driving rod (55), a first slider (56), a first inclined surface (561), a second slider (57), a second inclined surface (571), a third inclined surface (58) and a sliding rod (59); the positioning plate (51) is fixed on the first guide rail (611); the positioning hole (53) is provided on the positioning plate (51); the positioning sleeve (52) is fixed in the positioning hole (53); the slide groove (54) is provided on the side wall of the positioning sleeve (52); the driving rod (55) is connected to the first guide rail (611) through a guide block (551) Slidingly connected in the positioning sleeve (52) and fixedly connected to the first slider (56), the first slider (56) has a first inclined surface (561) at one end away from the driving rod (55), the second slider (57) is rotatably connected to the first connecting plate (612), the second inclined surface (571) is provided on the second slider (57) and is used to contact with the first inclined surface (561), the third inclined surface (58) is provided at one end of the positioning sleeve (52) away from the driving rod (55), the sliding rod (59) is fixed on the side wall of the second slider (57) and is slidably connected in the sliding groove (54) or embedded in the third inclined surface (58), and the first connecting plate (612) is connected to the positioning plate (51) through an elastic member (511);Step 7: inspect the defective materials through the blanking inspection mechanism (8); the blanking inspection mechanism (8) includes an inclined guide rail (81), a material discharge trough (82), a contact plate (83) and a mounting plate (84); one end of the inclined guide rail (81) is connected to the mounting plate (7); the material discharge trough (82) is opened in the middle of the inclined guide rail (81); the mounting plate (84) is fixed on the inclined guide rail (81); the contact plate (83) is connected to the mounting plate (84) through a height adjustment mechanism (85); the contact plate (83) contacts the nut; the height adjustment mechanism (85) includes a screw rod (851), a screw sleeve (852) and a limit rod (853); the limit rod (853) is fixed on the outer wall of the screw sleeve (852) and is slidably connected to the mounting plate (84); the screw rod (851) and the screw sleeve (852) are screwed together. The spiral sleeve (852) is connected with the contact plate (83) at one end away from the spiral rod (851); the spiral rod (851) is connected with the handle (87) through a transmission mechanism (86); the transmission mechanism (86) comprises a first gear (861) and a second gear (862) both rotatably connected to the mounting plate (84); the first gear (861) is connected with the spiral rod (851); the second gear (862) is connected with the handle (87); the first gear (861) is meshed with the second gear (862); the outer diameter of the first gear (861) is larger than the outer diameter of the second gear (862); Step 8: a spiral pattern is formed on the connecting rod by a thread rolling machine (100) to obtain a semi-finished product; the outer diameter of the spiral pattern is larger than the inner diameter of the flat washer; Step 9: the semi-finished product is knurled by a knurling machine to obtain a finished assembly. ; 2. The method for producing a hexagonal knurled assembly according to claim 1, characterized in that: The straightening mechanism (2) comprises a support plate (21), a straightening wheel (22) and a driving positioning structure (23); the straightening wheel (22) is slidably connected to the support plate (21) via a slider; the straightening wheel (22) is rotatably connected to the slider; a clamping cavity (24) for placing a steel wire is formed between adjacent straightening wheels (22); the slider moves toward or away from the clamping cavity (24) via the driving positioning structure (23).

3. The method for producing a hexagonal knurled assembly according to claim 2, characterized in that: The driving positioning structure (23) comprises a transmission disc (31), a spiral groove (32), a Z-shaped rod (33) and a fixing bolt, wherein the transmission disc (31) is rotatably connected to the support plate (21), the spiral groove (32) is formed on the surface of the transmission disc (31), the Z-shaped rod (33) is placed in the spiral groove (32) and is fixedly connected to the slider, and the fixing bolt is threadedly connected to the support plate (21) and contacts the slider.

4. The method for producing a hexagonal knurled assembly according to claim 2, characterized in that: The sliding block is connected to a telescopic positioning rod (34), and the telescopic positioning rod (34) is rotatably connected to a pressure wheel (37), and the pressure wheel (37) is placed in the clamping cavity (24) and contacts the steel wire.

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