Spring automatic blanking and feeding device and method

Abstract

The application discloses a spring automatic blanking and feeding device and method, which is applied to the field of automatic assembly equipment of ball-point pens and has the technical scheme as follows: a base and a fixing seat fixedly connected to the base; the fixing seat is respectively provided with a storage escapement assembly for storing springs and releasing one spring at a time, a spring feeding assembly for feeding the spring into a pen barrel and inhibiting spring rebound, and a pen barrel clamping assembly for clamping at least one pen barrel in the vertical direction; and the spring feeding assembly is provided with a gravity blocking assembly for controlling the falling of the spring; and the spring automatic blanking and feeding device has the technical effect of guaranteeing the spring feeding efficiency and improving the yield rate in the spring mounting process.

Description

Technical Field

[0001] This invention relates to the field of automatic ballpoint pen assembly equipment, and in particular to an automatic spring feeding device and method. Background Technology

[0002] In the automated assembly process of pen products, it is often necessary to insert springs axially into the pen barrel. Unlike general rigid parts, the springs installed in pen products are not only lightweight, but also have a significant tendency to store energy and rebound during installation. Especially when the spring falls into the narrow inner cavity of the pen barrel through the guide channel, it is very easy for the spring to bounce back, deflect, get stuck, or even bounce out of the pen barrel under the action of elastic force after hitting the inner wall or bottom of the pen barrel. These problems are particularly prominent in scenarios with small inner cavity space of pen barrel and fast assembly cycle. As a result, the spring cannot fall accurately into the target installation position, and it will also cause the pen barrel, seals and other accessories in subsequent processes to be unable to be properly installed into the pen barrel or to properly abut against the spring, thus affecting the assembly consistency and assembly yield of the entire pen. Currently, the pen assembly industry still relies on manual methods for spring installation: operators use tweezers or manual clamps to insert each spring into the inner wall of the pen barrel, thus controlling the spring's placement and preventing it from springing back. However, manual installation is inefficient and labor-intensive, increasing labor costs. Meanwhile, Chinese patent application CN210232189U discloses an automatic pen barrel assembly system, including a spring unloading tray and a spring assembly push rod, which pushes the spring into the pen barrel. Chinese invention patent CN109202401B discloses an automatic pencil lead assembly. The spring feeding device of the assembly machine includes a vibratory feeder, a conveyor rail, and a separate spring feeding mechanism. The separate spring feeding mechanism enables the individual and rapid feeding of springs. However, the existing technology cannot effectively suppress the impact and rebound of springs as they fall through the guide channel and enter the narrow inner cavity of the pen holder. As a result, in actual production operation, spring rebound, skewness, and jamming frequently occur. This forces the equipment to stop frequently for cleaning or to add manual inspection and reassembly processes, which seriously restricts production efficiency. Therefore, it is necessary to improve the existing automatic spring feeding equipment on the market to ensure spring feeding efficiency while improving the yield rate of springs during the installation process. Summary of the Invention

[0003] The primary objective of this invention is to provide an automatic spring feeding and unloading device, which has the advantage of ensuring efficient spring feeding while improving the yield rate during spring installation.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an automatic spring feeding and unloading device, comprising a base and a fixed seat fixedly connected to the base; the fixed seat is provided with a storage escapement assembly for storing springs and releasing one spring at a time along the vertical direction, a spring unloading assembly for feeding the spring into the pen barrel and suppressing the spring rebound, and a pen barrel clamping assembly for clamping at least one pen barrel, wherein the spring unloading assembly is provided with a gravity blocking assembly for controlling the falling of the spring.

[0005] The present invention is further configured such that: the storage escapement assembly includes a storage seat fixedly connected to the fixed base in the vertical direction; the storage seat has at least one spring storage hole for storing springs in the vertical direction; an escapement rod for inserting into the middle of the spring from the side to limit the spring from falling is slidably connected to the side wall of the storage seat in the horizontal direction; a horizontal escapement cylinder for driving the escapement rod to slide in the horizontal direction is fixedly connected to the fixed base in the horizontal direction; and a photoelectric sensor for detecting the spring falling is also fixedly connected to the bottom of the storage seat.

[0006] The present invention is further configured such that: a vibrating feeding plate for automatically feeding material into the spring storage hole is fixedly connected to the base.

[0007] The invention is further configured such that: the spring feeding assembly includes a vertical feeding block slidably connected to the fixed base along the vertical direction based on a vertical lifting cylinder; a sliding feeding rod is movably connected to the bottom of the vertical feeding block along the vertical direction, which automatically falls into the inner wall of the pen barrel under gravity to achieve precise feeding; the vertical feeding block and the sliding feeding rod have a spring feeding hole that is connected and concentrically arranged with the spring storage hole and the pen barrel; the gravity blocking assembly includes a first blocking assembly disposed in the vertical feeding block and a second blocking assembly disposed at the bottom of the sliding feeding rod; a magnetic adsorption assembly for adsorbing the sliding feeding rod is fixedly connected to the vertical feeding block; and a rebound suppression assembly for suppressing spring rebound is also provided on the vertical feeding block.

[0008] The present invention is further configured such that: the first blocking component includes a rotating part rotatably connected to the side wall of the vertical feeding block based on a rotating shaft, a closing part for closing the spring feeding hole from below is fixedly connected to one end of the rotating part, a counterweight is fixedly connected to the other end of the rotating part, and an abutting block for abutting the counterweight upward to open the spring feeding hole during the descent of the vertical feeding block is also provided on the fixed base; The second blocking assembly includes a spring blocking plate rotatably connected to the bottom of the sliding feed rod based on a rebound torsion spring, used to prevent the spring from falling further.

[0009] The present invention is further configured such that: the magnetic adsorption assembly includes a vertical guide sliding hole opened in the vertical material release block along the vertical direction; a vertical guide sliding block is concentrically fixedly connected to the outside of the sliding material release rod and slidably connected in the vertical guide sliding hole; an adsorption electromagnet for adsorbing the guide sliding block is fixedly connected to the top of the vertical guide sliding hole; the sliding material release rod is released or adsorbed based on the on and off state of the adsorption electromagnet; a positioning contact sensor is provided at the top of the sliding material release rod for abutting the bottom of the sliding guide sliding hole; and a blocking block for preventing the vertical guide sliding hole from detaching is fixedly connected to the bottom of the vertical guide sliding hole.

[0010] The present invention is further configured such that: the rebound suppression component includes an air blowing hole formed on the side wall of the vertical feeding block for blowing air into the spring feeding hole to suppress the spring rebound; the air blowing hole is connected to an air blowing pipe; and a plurality of inclined pressure relief holes are uniformly formed along the circumferential direction at the bottom of the sliding feeding rod to release the air pressure inside the pen barrel while promoting the upward sliding and resetting of the sliding feeding rod.

[0011] The present invention is further configured such that the airflow velocity in the spring discharge hole is between 5-8 m / s.

[0012] The present invention is further configured such that: the pen barrel clamping assembly includes opposing clamping cylinders symmetrically fixedly connected to the fixed base, and a pen barrel clamping block fixedly connected to the opposing clamping cylinders, wherein the pen barrel clamping block is provided with a pen barrel positioning clamping hole for positioning the pen barrel.

[0013] The second objective of this invention is to provide an automatic spring feeding and unloading method, which has the advantage of ensuring spring feeding efficiency while improving the yield rate during spring installation.

[0014] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an automatic spring feeding method, using an automatic spring feeding device as described in the above technical solution; comprising: Step 1: The pen barrel clamping assembly clamps the pen barrel in the assembly position directly below the spring feeding assembly; Step 2: The storage escapement assembly releases one spring at a time. The released spring falls vertically into the spring discharge hole of the spring discharge assembly and is caught by the gravity blocking assembly. Step 3: The vertical lifting cylinder drives the spring feeding assembly to descend. During the descent, the first blocking assembly is automatically unlocked and opened by the abutment. The spring is released first and falls down along the spring feeding hole into the sliding feeding rod and is blocked by the second blocking assembly. Step 4: De-energize the electromagnet to release the sliding feed rod. Under the action of gravity, the sliding feed rod slides down the inner wall of the pen barrel until the bottom of the sliding feed rod is completely against the inner wall of the pen barrel. Step 5: At the end of the sliding discharge rod's descent process, air is continuously supplied to the spring discharge hole through the air blowing hole. The spring baffle plate rotates downward under the action of the wind force to release the obstruction of the spring, and the spring falls into the pen barrel. After the pen barrel finishes discharging, air is continuously supplied to form a continuous and stable airflow in the spring discharge hole to suppress the spring rebound until the spring recovers. Step 6: The air inside the pen barrel is released through the inclined pressure relief hole at the bottom of the sliding feed rod, which promotes the upward movement and reset of the sliding feed rod. At the same time, the electromagnet attracts the sliding feed rod to reset, the spring feed assembly rises, the rebound suppression assembly stops supplying air, and the first and second blocking assemblies reset to re-close the spring feed hole.

[0015] In summary, the present invention has the following beneficial effects: 1. This invention, on the one hand, by setting a vertically sliding feeding rod, guides the spring directly from the pen barrel opening to the bottom of the pen barrel cavity for release, thereby greatly shortening the free fall distance of the spring and thus greatly reducing the rebound energy converted from the spring's potential energy. On the other hand, by applying a continuous downward airflow to the spring feeding hole through the rebound suppression component, a continuous positive damping force is applied to the spring, thereby effectively counteracting the residual elastic restoring force in the spring and suppressing the impact rebound action of the spring falling into the pen barrel, effectively improving the yield rate during the spring installation process; 2. This invention features a sliding feeding rod that is magnetically attached to the vertical feeding block. When the electromagnet is de-energized, the sliding feeding rod slides freely along the inner wall of the pen barrel under its own gravity. The final stopping position of the sliding feeding rod is determined by the contact position between the inner wall of the pen barrel and the head of the pen barrel, rather than a fixed stroke. This ensures that for pen barrels of different specifications, the final release point of the spring is always located at the lowest point adapted to the inner cavity of the pen barrel. Furthermore, it eliminates the need for frequent changes to the model of the release rod and the lifting distance. It can also accommodate spring installation requirements when the vertical position of the pen barrel deviates significantly after clamping and positioning, greatly improving the versatility of the equipment. 3. This invention achieves automatic feeding, unloading, and installation of springs by setting up a material storage escapement component, a spring unloading component, and a pen barrel clamping component, eliminating the need for manual installation, significantly reducing labor costs, and improving spring assembly efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this embodiment; Figure 2 This is a schematic diagram of the structure of the material storage escapement assembly, the spring release assembly, and the pen barrel clamping assembly in this embodiment; Figure 3 yes Figure 2 Enlarged schematic diagram of part A; Figure 4 yes Figure 2 Enlarged diagram of part B; Figure 5 This is a cross-sectional view of the material storage escapement assembly in this embodiment; Figure 6 This is a cross-sectional view of the gravity blocking component in this embodiment; Figure 7 yes Figure 6 Enlarged schematic diagram of part C.

[0017] Reference numerals: 1. Base; 2. Fixed base; 3. Storage and escapement assembly; 31. Storage seat; 32. Spring storage hole; 33. Escape rod; 34. Horizontal escape cylinder; 35. Photoelectric sensor; 36. Vibrating feeder; 4. Spring release assembly; 41. Vertical lifting cylinder; 42. Vertical release block; 43. Sliding release rod; 44. Spring release hole; 45. Magnetic adsorption assembly; 451. Vertical guide sliding hole; 452. Vertical guide sliding block; 453. Adsorption electromagnet; 454. Position contact. 455. Sensor; 46. Blocking block; 47. Springback suppression assembly; 48. Air blowing hole; 49. Air blowing pipe; 40. Inclined pressure relief hole; 50. Pen barrel clamping assembly; 51. Opposing clamping cylinder; 52. Pen barrel clamping block; 53. Pen barrel positioning clamping hole; 61. Gravity blocking assembly; 62. First blocking assembly; 63. Rotating shaft; 64. Rotating part; 65. Sealing part; 66. Counterweight part; 67. Abutment block; 68. Second blocking assembly; 69. Springback torsion spring; 60. Spring blocking plate. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] Example 1: refer to Figure 1An automatic spring feeding and unloading device includes a base 1 and a fixed base 2 fixedly connected to the base 1. The fixed base 2 is vertically provided with a storage escapement assembly 3 for storing springs and releasing one spring at a time, a spring unloading assembly 4 for feeding springs into the pen barrel and suppressing spring rebound, and a pen barrel clamping assembly 5 for clamping at least one pen barrel. The spring unloading assembly 4 includes a gravity blocking assembly 6 for controlling the spring's descent. During spring assembly, the pen barrel is first clamped into the spring barrel by the pen barrel clamping assembly 5. The spring is positioned directly below the spring release assembly 4, at the assembly position. Simultaneously, the storage escape assembly 3 releases a single spring into the pen barrel clamping assembly 5, where it is blocked by the gravity blocking assembly 6. Subsequently, the pen barrel clamping assembly 5 sends the spring to the bottom of the pen barrel cavity and then controls the gravity blocking assembly 6 to release the spring, which falls into the pen barrel. This significantly shortens the distance the spring falls freely, thereby reducing the rebound energy converted from potential energy. This reduces spring rebound, misalignment, and jamming during spring installation, improving the yield rate of spring installation.

[0020] refer to Figure 2 , Figure 3 and Figure 5 Specifically, the storage escapement assembly 3 includes a storage seat 31 fixedly connected to the fixed base 2 in the vertical direction. At least one spring storage hole 32 for storing springs is opened in the storage seat 31 in the vertical direction. A vibrating feeder 36 for automatically feeding springs into the spring storage hole 32 is fixedly connected to the base 1. An escapement rod 33 for inserting into the middle of the spring from the side to limit the spring's fall is slidably connected to the side wall of the storage seat 31 in the horizontal direction. The head of the escapement rod 33 located in the spring storage hole 32 has a pointed structure to facilitate insertion into the middle position of the spring. A mechanism for driving the escapement rod 33 to move horizontally is fixedly connected to the fixed base 2 in the horizontal direction. The horizontal escapement cylinder 34, which slides in the direction, is also fixedly connected to a photoelectric sensor 35 at the bottom of the storage seat 31 for detecting the spring dropping. The spring is conveyed to the spring storage hole 32 by the self-vibrating feeding plate 36. When a spring needs to be released, the horizontal escapement cylinder 34 drives the escape rod 33 to slide horizontally so that the head of the escape rod 33 is separated from the spring at the bottom. Then the spring falls due to gravity. Then the horizontal escapement cylinder 34 drives the escape rod 33 to immediately reset and insert it into the middle position of the spring at the bottom, thereby preventing the spring from continuing to release. The photoelectric sensor 35 at the bottom senses whether the spring is released normally or whether the number of released is greater than 1.

[0021] refer to Figure 6 and Figure 7Specifically, the spring feeding assembly 4 includes a vertical feeding block 42 slidably connected to the fixed base 2 along the vertical direction based on a vertical lifting cylinder 41. A sliding feeding rod 43, which automatically falls into the inner wall of the pen barrel under gravity to achieve precise feeding, is movably connected to the bottom of the vertical feeding block 42 along the vertical direction. A spring feeding hole 44, which is connected to the vertical feeding block 42 and the sliding feeding rod 43 and is concentrically arranged with the spring storage hole 32 and the pen barrel, is provided. The gravity blocking assembly 6 includes a first blocking assembly 61 disposed within the vertical feeding block 42 and a second blocking assembly 62 disposed at the bottom of the sliding feeding rod 43. A magnetic adsorption assembly 45 for adsorbing the sliding feeding rod 43 is fixedly connected to the vertical feeding block 42. A spring rebound suppression assembly 46 for suppressing spring rebound is also provided on the vertical feeding block 42. After the material storage escapement component 3 falls into the spring release hole 44, it is blocked by the first blocking component 61. When the spring is installed, the spring release component 4 is driven to descend by the vertical lifting cylinder 41. The first blocking component 61 is automatically unlocked and opened during the descent due to the abutment action. The spring is released first and falls into the sliding release rod 43 along the spring release hole 44 and is blocked by the second blocking component 62. Then the electromagnet 453 is de-energized to release the sliding release rod 43. The sliding release rod 43 slides down the inner wall of the pen barrel under the action of gravity until the bottom of the sliding release rod 43 completely abuts against the inner wall of the pen barrel. Finally, the second blocking component 62 is opened by the rebound suppression component 46, and the spring falls into the inner wall of the pen barrel to complete the installation. The elastic potential energy of the spring is suppressed by the rebound suppression component 46 until the spring returns to its initial state.

[0022] refer to Figure 6 and Figure 7 Specifically, the first blocking assembly 61 includes a rotating part 612 rotatably connected to the side wall of the vertical feeding block 42 based on a rotating shaft 611. A closing part 613 for closing the spring feeding hole 44 from below is fixedly connected to one end of the rotating part 612, and a counterweight part 614 is fixedly connected to the other end of the rotating part 612. The fixed base 2 is also provided with an abutting block 615 for abutting the counterweight part 614 upwards during the descent of the vertical feeding block 42 to open the spring feeding hole 44. The torque at the end where 4 is located is greater than the torque at the end where the closing part 613 is located. In the initial state, the closing part 613 is horizontal to close the spring discharge hole 44, thereby preventing the spring from falling. When the vertical lifting cylinder 41 drives the vertical discharge block 42 to descend, the abutting block 615 abuts against the counterweight 614 upward, thereby driving the counterweight 614 to rotate upward. The closing part 613 rotates downward to open the spring discharge hole 44, thereby enabling the spring to fall through the spring discharge hole 44. The second blocking assembly 62 includes a spring blocking plate 622 rotatably connected to the bottom of the sliding feed rod 43 based on a spring-loaded torsion spring 621, which is used to prevent the spring from falling further. The spring blocking plate 622 is driven to rotate downward by the spring-loaded suppression assembly 46 blowing air onto its surface. When the blowing is stopped, the spring-loaded torsion spring 621 drives the spring blocking plate 622 to reset.

[0023] refer to Figure 7 Specifically, the magnetic adsorption assembly 45 includes a vertical guide sliding hole 451 opened vertically in the vertical feeding block 42. A vertical guide sliding block 452 is concentrically fixed to the outside of the sliding feeding rod 43 and slidably connected in the vertical guide sliding hole 451. An adsorption electromagnet 453 for adsorbing the guide sliding block is attached and fixedly connected to the top of the vertical guide sliding hole 451. The sliding feeding rod 43 is released or adsorbed by the on and off of the adsorption electromagnet 453. A positioning contact sensor 454 is provided at the top of the sliding feeding rod 43 for abutting the bottom of the sliding guide sliding hole. The positioning contact sensor 454 is used to detect whether the sliding feeding rod 43 has been reset. A blocking block 455 for preventing the vertical guide sliding hole 451 from disengaging is fixedly connected to the bottom of the vertical guide sliding hole 451. The blocking block 455 can be removed from the bottom of the sliding guide sliding hole. By removing the blocking block 455, sliding feeding rods 43 of different specifications and shapes can be replaced.

[0024] refer to Figure 6 and Figure 7 Specifically, the rebound suppression component 46 includes an air blowing hole 461 formed on the side wall of the vertical feeding block 42 for blowing air into the spring feeding hole 44 to suppress spring rebound. An air blowing pipe 462 is connected to the air blowing hole 461. Several inclined pressure relief holes 463 are evenly formed along the circumferential direction at the bottom of the sliding feeding rod 43 to release the air pressure inside the pen barrel while promoting the upward sliding and resetting of the sliding feeding rod 43. By applying a continuous downward airflow to the spring feeding hole 44 through the rebound suppression component 46, a continuous positive damping force is applied to the spring, effectively counteracting the residual elastic restoring force inside the spring, thereby suppressing the impact rebound action of the spring falling into the pen barrel. In this embodiment, the airflow velocity inside the spring feeding hole 44 is between 5-8 m / s.

[0025] refer to Figure 2 and Figure 4 Specifically, the pen clamping assembly 5 includes opposing clamping cylinders 51 symmetrically fixedly connected to the fixed base 2, and a pen clamping block 52 fixedly connected to the opposing clamping cylinders 51. The pen clamping block 52 has a pen positioning clamping hole 53 for positioning the pen. The opposing clamping cylinders 51 drive the pen clamping block 52 to clamp the pen, thereby fixing the pen in the pen positioning clamping hole 53.

[0026] Example 2: An automatic spring feeding method, using an automatic spring feeding device as shown in Example 1, includes: Step 1: The pen barrel clamping assembly 5 clamps the pen barrel in the assembly position directly below the spring feeding assembly 4; Step 2: The storage escapement assembly 3 releases one spring at a time. The released spring falls vertically into the spring discharge hole 44 of the spring discharge assembly 4 and is received by the gravity blocking assembly 6. Step 3: The vertical lifting cylinder 41 drives the spring feeding assembly 4 to descend. The first blocking assembly 61 is automatically unlocked and opened during the descent due to the abutment action. The spring is released first and falls into the sliding feeding rod 43 along the spring feeding hole 44 and is blocked by the second blocking assembly 62. Step 4: The electromagnet 453 is de-energized to release the sliding feed rod 43. The sliding feed rod 43 slides down the inner wall of the pen barrel under the action of gravity until the bottom of the sliding feed rod 43 is completely in contact with the inner wall of the pen barrel. Step 5: At the end of the sliding discharge rod 43's descent process, air is continuously supplied to the spring discharge hole 44 through the air blowing hole 461. The spring blocking plate 622 rotates downward under the action of the wind force to release the obstruction of the spring, and the spring falls into the pen barrel. After the pen barrel is finished discharging, air is continuously supplied to form a continuous and stable airflow in the spring discharge hole 44 to suppress the spring rebound until the spring recovers. Step 6: The air inside the pen barrel is released through the inclined pressure relief hole 463 at the bottom of the sliding feed rod 43, which promotes the upward movement and reset of the sliding feed rod 43. At the same time, the electromagnet 453 attracts the sliding feed rod 43 to reset, the spring feed assembly 4 rises, the rebound suppression assembly 46 stops supplying air, and the first blocking assembly 61 and the second blocking assembly 62 reset to re-close the spring feed hole 44.

[0027] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make inventive modifications to this embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A spring-loaded automatic feeding device, comprising a base (1) and a fixed seat (2) fixedly connected to the base (1); characterized in that, The fixed base (2) is provided with a storage escapement assembly (3) for storing springs and releasing one spring at a time along the vertical direction, a spring release assembly (4) for feeding the spring into the pen barrel and suppressing the spring rebound, and a pen barrel clamping assembly (5) for clamping at least one pen barrel. The spring release assembly (4) is provided with a gravity blocking assembly (6) for controlling the spring to fall.

2. The automatic spring-loaded feeding device according to claim 1, characterized in that, The storage escapement assembly (3) includes a storage seat (31) fixedly connected to the fixed base (2) in the vertical direction. The storage seat (31) has at least one spring storage hole (32) for storing springs in the vertical direction. The side wall of the storage seat (31) is slidably connected to an escape rod (33) for inserting into the middle of the spring from the side to limit the spring from falling. The fixed base (2) is fixedly connected to a horizontal escape cylinder (34) for driving the escape rod (33) to slide in the horizontal direction. The bottom of the storage seat (31) is also fixedly connected to a photoelectric sensor (35) for detecting the spring falling.

3. The automatic spring-loaded feeding device according to claim 2, characterized in that, A vibrating feeder (36) for automatically feeding material into the spring storage hole (32) is fixedly connected to the base (1).

4. The automatic spring-loaded feeding device according to claim 2, characterized in that, The spring feeding assembly (4) includes a vertical feeding block (42) slidably connected to the fixed base (2) along the vertical direction based on a vertical lifting cylinder (41). The bottom of the vertical feeding block (42) is movably connected along the vertical direction to a sliding feeding rod (43) that automatically falls into the inner wall of the pen barrel under gravity to achieve precise feeding. The vertical feeding block (42) and the sliding feeding rod (43) are connected and are concentrically arranged with the spring storage hole (32) and the pen barrel. The spring feeding hole (44) is provided. The gravity blocking assembly (6) includes a first blocking assembly (61) disposed in the vertical feeding block (42) and a second blocking assembly (62) disposed at the bottom of the sliding feeding rod (43). A magnetic adsorption assembly (45) for adsorbing the sliding feeding rod (43) is fixedly connected to the vertical feeding block (42). A rebound suppression assembly (46) for suppressing the spring rebound is also provided on the vertical feeding block (42).

5. The automatic spring-loaded feeding device according to claim 4, characterized in that, The first blocking assembly (61) includes a rotating part (612) rotatably connected to the side wall of the vertical feeding block (42) based on a rotating shaft (611). One end of the rotating part (612) is fixedly connected to a closing part (613) for closing the spring feeding hole (44) from below. The other end of the rotating part (612) is fixedly connected to a counterweight part (614). The fixed base (2) is also provided with an abutting block (615) for abutting the counterweight part (614) upward during the descent of the vertical feeding block (42) to open the spring feeding hole (44). The second blocking assembly (62) includes a spring blocking plate (622) rotatably connected to the bottom of the sliding feed rod (43) based on a spring-loaded torsion spring (621) for preventing the spring from falling further.

6. The automatic spring-loaded feeding device according to claim 4, characterized in that, The magnetic adsorption assembly (45) includes a vertical guide sliding hole (451) opened vertically in the vertical feeding block (42). A vertical guide sliding block (452) is slidably connected to the outside of the sliding feeding rod (43) and is fixedly attached to the top of the vertical guide sliding hole (451). An adsorption electromagnet (453) for adsorbing the guide sliding block is fixedly connected to the top of the vertical guide sliding hole (451). The sliding feeding rod (43) is released or adsorbed based on the on and off of the adsorption electromagnet (453). The top of the sliding feeding rod (43) is provided with a positioning contact sensor (454) for abutting the bottom of the sliding guide sliding hole. A blocking block (455) for preventing the vertical guide sliding hole (451) from detaching is fixedly connected to the bottom of the vertical guide sliding hole (451).

7. The automatic spring-loaded feeding device according to claim 6, characterized in that, The rebound suppression component (46) includes an air blowing hole (461) opened on the side wall of the vertical feeding block (42) for blowing air into the spring feeding hole (44) to suppress the spring rebound. The air blowing hole (461) is connected to an air blowing pipe (462). The bottom of the sliding feeding rod (43) is evenly provided with a plurality of inclined pressure relief holes (463) along the circumferential direction to release the air pressure in the pen barrel and promote the sliding feeding rod (43) to slide upward and reset.

8. The automatic spring-loaded feeding device according to claim 7, characterized in that, The airflow velocity in the spring discharge hole (44) is between 5-8 m / s.

9. The automatic spring-loaded feeding device according to claim 1, characterized in that, The pen clamping assembly (5) includes opposing clamping cylinders (51) symmetrically fixedly connected to the fixed base (2), and a pen clamping block (52) fixedly connected to the opposing clamping cylinders (51). The pen clamping block (52) is provided with a pen positioning clamping hole (53) for positioning the pen.

10. A method for automatically feeding springs, using the automatic spring feeding device as described in claim 7; characterized in that, include: Step 1: The pen barrel clamping assembly (5) clamps the pen barrel in the assembly position directly below the spring feeding assembly (4); Step 2: The storage escape assembly (3) releases a spring at a time. The released spring falls vertically into the spring release hole (44) of the spring release assembly (4) and is caught by the gravity blocking assembly (6). Step 3: The vertical lifting cylinder (41) drives the spring feeding assembly (4) to descend. The first blocking assembly (61) is automatically unlocked and opened during the descent due to the abutment action. The spring is released first and falls into the sliding feeding rod (43) along the spring feeding hole (44) and is blocked by the second blocking assembly (62). Step 4: De-energize the electromagnet (453) to release the sliding feed rod (43). The sliding feed rod (43) slides down the inner wall of the pen barrel under the action of gravity until the bottom of the sliding feed rod (43) is completely against the inner wall of the pen barrel. Step 5: At the end of the sliding feed rod (43) falling process, air is continuously supplied to the spring feed hole (44) through the air blowing hole (461). The spring blocking plate (622) rotates downward under the action of wind force to release the obstruction of the spring. The spring falls into the pen barrel. After the pen barrel is finished falling, air is continuously supplied to form a continuous and stable airflow in the spring feed hole (44) to suppress the spring rebound until the spring recovers. Step 6: The air inside the pen barrel is released through the inclined pressure relief hole (463) at the bottom of the sliding feed rod (43) and the air pressure inside the pen barrel is released, which promotes the upward movement and reset of the sliding feed rod (43). At the same time, the electromagnet (453) attracts the sliding feed rod (43) to reset, the spring feed assembly (4) rises, the rebound suppression assembly (46) stops supplying air, and the first blocking assembly (61) and the second blocking assembly (62) reset to re-close the spring feed hole (44).

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