A four-station external chamfering machine for springs

Abstract

The utility model discloses a four-station external chamfering machine for springs, comprising a frame, a processing conveyor belt fixedly connected to the surface of the frame, four chamfering devices staggeredly arranged on both sides of the processing conveyor belt, a transfer mechanism arranged at the input end of the processing conveyor belt, a vibrating loading plate arranged at the end of the transfer mechanism away from the processing conveyor belt, and the chamfering device comprising a grinding wheel, which is arranged at a 45-degree angle to the processing conveyor belt. By adding two chamfering devices, the utility model can perform two chamfering operations on both ends of the spring respectively, and the chamfering requirement can be completed without repeated loading, and by changing the inclination angle of the grinding wheel, the grinding wheel can be closer to the spring for chamfering operation, thereby achieving the processing requirement of C1.7 chamfering amount.

Description

Technical Field

[0001] The present invention relates to the technical field of spring chamfering equipment, and in particular to a four-station external chamfering machine for springs. Background Art

[0002] The spring external chamfering machine uses a grinding wheel to grind the spring to complete the chamfering operation. The existing spring external chamfering machine only has two chamfering devices. If the chamfering amount needs to reach C1.5 or above, two chamfering operations are required to complete it. The first chamfering needs to be C1.0, and then the material is re-added for chamfering to reach the chamfering amount C1.5. In addition, the grinding wheel of the existing external chamfering machine is placed horizontally, and can only be adjusted forward and backward according to the chamfering amount of the spring. Due to the height limit of the track guard plate, if the chamfering amount needs to reach C1.7, the equipment cannot meet the requirements. Utility Model Content

[0003] The present disclosure provides a spring four-station external chamfering machine to solve one of the technical problems recognized by the inventor.

[0004] The present invention provides a four-station external chamfering machine for springs, comprising a frame, a surface of the frame being fixedly connected to a processing conveyor belt, four chamfering devices being staggeredly arranged on both sides of the processing conveyor belt, an input end of the processing conveyor belt being provided with a transfer mechanism, an end of the transfer mechanism away from the processing conveyor belt being provided with a vibrating loading tray, the chamfering device comprising a grinding wheel, and the grinding wheel being arranged at an angle of 45 degrees to the processing conveyor belt.

[0005] Preferably, the chamfering device includes a base, a surface of the base is provided with a first linear adjustment mechanism, the first linear adjustment mechanism is transmission-connected with a grinding wheel mounting bracket, the surface of the grinding wheel mounting bracket is set at a 45-degree angle to the processing conveyor belt, the surface of the grinding wheel mounting bracket is provided with a second linear adjustment mechanism, the second linear adjustment mechanism is transmission-connected with a translation plate, one end of the translation plate is fixedly connected with a grinding wheel bottom plate, the side of the grinding wheel bottom plate is rotatably connected with a grinding wheel, the surface of the translation plate is fixedly connected with a driving mechanism, and the driving mechanism is transmission-connected with the grinding wheel.

[0006] Preferably, the first linear adjustment mechanism includes a first linear guide rail fixedly connected to the surface of the base, a first slider is slidably connected to the first linear guide rail, the surface of the first slider is fixedly connected to the grinding wheel mounting bracket, the surface of the base is rotatably connected to a first screw rod, a first screw rod nut is threadedly connected to the first screw rod, the first screw rod nut is fixedly connected to the bottom of the grinding wheel mounting bracket, and one end of the first screw rod is fixedly connected to a first handwheel.

[0007] Preferably, the second linear adjustment mechanism includes a second linear guide rail fixedly connected to the surface of the grinding wheel mounting bracket, a second slider is slidably connected to the second linear guide rail, the surface of the second slider is fixedly connected to the translation plate, a second screw rod is rotatably connected to the surface of the grinding wheel mounting bracket, a second screw rod nut is threadedly connected to the second screw rod, the second screw rod nut is fixedly connected to the bottom of the translation plate, and one end of the second screw rod is fixedly connected to a second hand wheel.

[0008] Preferably, the driving mechanism includes a driving motor fixedly connected to the surface of the translation plate, the output shaft key of the driving motor is connected to a large pulley, the large pulley is connected to a small pulley through a synchronous belt transmission, both sides of the grinding wheel base are fixedly connected to a grinding wheel support, the two ends of the grinding wheel are rotatably connected to the grinding wheel support through a rotating shaft, and the small pulley is fixedly connected to the rotating shaft.

[0009] Preferably, the transfer mechanism includes a transfer support, the top end of the transfer support is fixedly connected to a linear slide, the surface of the linear slide is transmission-connected to a transfer cylinder, the output end of the transfer cylinder is fixedly connected to a clamping cylinder, and the output shaft of the clamping cylinder is fixedly connected to a clamping block.

[0010] Preferably, a screening mechanism is arranged between the transfer mechanism and the processing conveyor belt, the screening mechanism includes an inclined loading bottom plate, the loading bottom plate is inclined, one end of the loading bottom plate is located at the bottom and is arranged against the input end of the processing conveyor belt, a screening port is opened in the middle of the loading bottom plate, a unloading chute is arranged below the screening port, and a material receiving box is arranged below the bottom end of the unloading chute.

[0011] Preferably, guide strips are respectively provided on both sides of the processing conveyor belt.

[0012] Preferably, a movable plate is fixedly connected to the side of the guide bar away from the processing conveyor belt, an adjustment hole is opened on the movable plate, a handle screw is passed through the adjustment hole, the handle screw is threadedly connected to a clamping ring, a clamping block is fixedly connected to the surface of the frame, the handle screw passes through the adjustment hole and is threadedly connected to the clamping block.

[0013] Preferably, the frame is provided with a dust collecting hood below the grinding wheel, one end of the dust collecting hood is connected to a dust suction pipe, and one end of the dust collecting hood close to the grinding wheel is fixedly connected to a filter screen.

[0014] The beneficial effects of the present disclosure are mainly that: by adding two chamfering devices, the utility model can perform two chamfering operations on both ends of the spring respectively, and the chamfering requirements can be met without repeated loading. Moreover, by changing the inclination angle of the grinding wheel, the grinding wheel can be closer to the spring for chamfering operations, thereby achieving the processing requirements of C1.7 chamfering amount.

[0015] It should be understood that both the foregoing general description and the following specific embodiments are for the purpose of example and illustration and do not necessarily limit the present disclosure. The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate the subject matter of the present disclosure. At the same time, the specification and the drawings are used to explain the principles of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the specific embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present disclosure;

[0018] Figure 2 The chamfering device structure of the embodiment of the present disclosure is shown in FIG. Figure 1 ;

[0019] Figure 3 The chamfering device structure of the embodiment of the present disclosure is shown in FIG. Figure 2 ;

[0020] Figure 4 It is a schematic diagram of the structure of the transfer mechanism of the embodiment of the present disclosure;

[0021] Figure 5 It is a schematic diagram of the structure of the screening mechanism of the embodiment of the present disclosure;

[0022] Figure 6 For the embodiments of the present disclosure Figure 1 A partial enlarged schematic diagram in the middle.

[0023] Icons: 1-frame; 2-processing conveyor belt; 3-chamfering device; 31-base; 32-first linear adjustment mechanism; 321-first linear guide; 322-first slider; 323-first screw rod; 324-first screw rod nut; 325-first hand wheel; 33-grinding wheel mounting bracket; 34-second linear adjustment mechanism; 341-second linear guide; 342-second slider; 343-second screw rod; 344-second screw rod nut; 345-second hand wheel; 351-driving motor; 352-large pulley; 353-small pulley; 354-synchronous Belt; 36-translation plate; 37-grinding wheel base plate; 38-grinding wheel support; 39-grinding wheel; 391-rotating shaft; 4-vibrating loading tray; 5-transfer mechanism; 51-transfer support; 52-linear slide; 53-transfer cylinder; 54-clamping cylinder; 55-clamping block; 6-screening mechanism; 61-loading base plate; 62-screening port; 63-unloading slide; 64-receiving box; 71-dust hood; 72-filter screen; 73-dust suction pipe; 81-guide strip; 82-movable plate; 83-adjustment hole; 84-handle screw; 85-clamping ring; 86-clamping block. DETAILED DESCRIPTION

[0024] The technical solution of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0025] Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present disclosure.

[0026] In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0028] Example

[0029] like Figure 1-6 As shown, this embodiment provides a spring four-station external chamfering machine, including a frame 1, a processing conveyor belt 2 is arranged on the surface of the frame 1 along the length direction of the frame 1, and the frame 1 is staggered on both sides of the processing conveyor belt 2. The front two chamfering devices 3 are set with a smaller chamfering amount, and the rear two chamfering devices 3 are set with a larger chamfering amount, so as to achieve a one-time chamfering requirement without repeated loading and re-chamfering, and the chamfering device 3 includes a grinding wheel 39, and the grinding wheel 39 is set at a 45-degree angle to the processing conveyor belt 2. The position of the grinding wheel 39 is not limited by the width of the processing conveyor belt 2 and the guard plates on both sides, and the chamfering amount can be freely adjusted; a transfer mechanism 5 is provided at the input end of the processing conveyor belt 2, and a vibrating loading tray 4 is provided at the end of the transfer mechanism 5 away from the processing conveyor belt 2. The spring is loaded to the bottom of the transfer mechanism 5 through the vibrating loading tray 4, and the spring is clamped and transferred to the processing conveyor belt 2 through the transfer mechanism 5, and then the spring is driven forward by the processing conveyor belt 2. When passing through the chamfering device 3, the two ends of the spring are chamfered by the high-speed rotating grinding wheel 39.

[0030] Among them, the chamfering device 3 includes a base 31, and a first linear adjustment mechanism 32 is arranged on the surface of the base 31, and the first linear adjustment mechanism 32 is arranged perpendicular to the processing conveyor belt 2, and the first linear adjustment mechanism 32 is transmission-connected with a grinding wheel mounting bracket 33, and the surface of the grinding wheel mounting bracket 33 is arranged at a 45-degree angle to the processing conveyor belt 2, so that the grinding wheel 39 is arranged at a 45-degree angle to the processing conveyor belt 2, and the surface of the grinding wheel mounting bracket 33 is provided with a second linear adjustment mechanism 34, and the second linear adjustment mechanism 34 is transmission-connected with a translation plate 36, one end of the translation plate 36 is fixedly connected to a grinding wheel bottom plate 37, and the side of the grinding wheel bottom plate 37 is rotatably connected to a grinding wheel 39, and the surface of the translation plate 36 is fixedly connected to a driving mechanism, and the driving mechanism is transmission-connected with the grinding wheel 39. The distance between the grinding wheel 39 and the processing conveyor belt 2 is adjusted by the first linear adjustment mechanism 32, so that the grinding wheel 39 is close to or away from the processing conveyor belt 2, and then the distance between the grinding wheel 39 and the spring is adjusted by the second linear adjustment mechanism 34, so as to adjust the chamfering amount. After adjusting the position of the grinding wheel 39, the grinding wheel 39 is driven to rotate at high speed by the driving mechanism, and the spring will contact the grinding wheel 39 when moving forward along the processing conveyor belt 2 to complete the chamfering operation.

[0031] Specifically, the first linear adjustment mechanism 32 includes a first linear guide 321 fixedly connected to the surface of the base 31 by bolts. There are two first linear guides 321, which are arranged in parallel on both sides of the surface of the base 31. A first slider 322 is slidably connected to the first linear guide 321, and the surface of the first slider 322 is fixedly connected to the grinding wheel mounting bracket 33. A first screw rod 323 is rotatably connected to the surface of the base 31. A first screw nut 324 is threadedly connected to the first screw rod 323, and the first screw nut 324 is fixedly connected to the bottom of the grinding wheel mounting bracket 33. One end of the first screw rod 323 is fixedly connected to a first hand wheel 325. By rotating the first hand wheel 325, the first screw rod 323 is driven to rotate, so that the first screw nut 324 moves forward and backward in the length direction of the first screw rod 323, thereby driving the grinding wheel mounting bracket 33 to move forward and backward, so that it is close to or away from the processing conveyor belt 2. The first linear guide 321 and the first slider 322 play the role of auxiliary guidance and support.

[0032] Specifically, the second linear adjustment mechanism 34 includes a second linear guide 341 fixedly connected to the surface of the grinding wheel mounting bracket 33. There are two second linear guides 341, which are arranged parallel to each other on both sides of the surface of the grinding wheel mounting bracket 33. A second slider 342 is slidably connected to the second linear guide 341, and the translation plate 36 is fixedly connected to the surface of the second slider 342. A second screw rod 343 is rotatably connected to the surface of the grinding wheel mounting bracket 33. A second screw nut 344 is threadedly connected to the second screw rod 343, and the second screw nut 344 is fixedly connected to the bottom of the translation plate 36. One end of the second screw rod 343 is fixedly connected to a second hand wheel 345. By rotating the second hand wheel 345, the second screw rod 343 is driven to rotate, so that the second screw nut 344 moves forward and backward in the direction of the second screw rod 343, thereby adjusting the distance between the grinding wheel 39 and the spring, and realizing the adjustment of the chamfering amount. The second linear guide 341 and the second slider 342 play the role of auxiliary guidance and support.

[0033] Specifically, the driving mechanism includes a driving motor 351 fixedly connected to the surface of the translation plate 36 by bolts, the output shaft of the driving motor 351 is keyed to a large pulley 352, the large pulley 352 is connected to a small pulley 353 through a synchronous belt 354, the two sides of the grinding wheel 39 base 31 are fixedly connected to a grinding wheel support 38, the two ends of the grinding wheel 39 are rotatably connected to the grinding wheel support 38 through a rotating shaft 391, a bearing is embedded on the grinding wheel support 38, the rotating shaft 391 penetrates the bearing so that it can be rotatably connected to the grinding wheel support 38, and the small pulley 353 is fixedly connected to the rotating shaft 391. The driving motor 351 drives the large pulley 352 to rotate, and drives the small pulley 353 to rotate through the synchronous belt 354, and the rotation of the small pulley 353 drives the rotating shaft 391 to rotate, thereby driving the grinding wheel 39 to rotate at a high speed to perform a chamfering operation on the spring.

[0034] Specifically, the transfer mechanism 5 includes a transfer support 51, the top of the transfer support 51 is fixedly connected to a linear slide 52, the surface of the linear slide 52 is transmission-connected to a transfer cylinder 53, the output end of the transfer cylinder 53 is fixedly connected to a clamping cylinder 54, and the output shaft of the clamping cylinder 54 is fixedly connected to a clamping block 55. The two ends of the linear slide 52 are respectively arranged at the discharge end of the vibrating loading tray 4 and the feed end of the processing conveyor belt 2. The moving direction of the transfer cylinder 53 is perpendicular to the linear slide 52. The clamping cylinder 54 is a clamping cylinder in the prior art. The transfer cylinder 53 is driven by the linear slide 52 to move above the discharge end of the vibrating loading tray 4, and then the transfer cylinder 53 drives the clamping cylinder 54 to move downward. The clamping cylinder 54 drives the clamping blocks 55 on both sides to close and clamp the spring, and then the transfer cylinder 53 drives the spring to move upward and leave the vibrating loading tray 4. The linear slide 52 moves the transfer cylinder 53 to the top of the processing conveyor belt 2, and the transfer cylinder 53 drives the clamping cylinder 54 to move downward. The clamping cylinder 54 releases the spring to make it fall onto the processing conveyor belt 2, and the loading is completed.

[0035] In one embodiment, a screening mechanism 6 is provided between the transfer mechanism 5 and the processing conveyor belt 2, and the screening mechanism 6 includes an inclined loading bottom plate 61. The loading bottom plate 61 is inclined, and one end of the loading bottom plate 61 at the bottom is arranged to abut against the input end of the processing conveyor belt 2. A screening port 62 is provided in the middle of the loading bottom plate 61, and a material discharge chute 63 is provided below the screening port 62, and a material receiving box 64 is provided below the bottom end of the material discharge chute 63. The width of the screening port 62 is greater than the width of the spring, and the width of the screening port 62 is less than the length of the spring. When the transfer mechanism 5 places the spring on the loading bottom plate 61, the spring rolls toward the feeding end of the processing conveyor belt 2 due to the action of gravity. If the spring is placed horizontally, the spring will not fall through the screening port 62. If the spring is placed vertically, it will fall when passing through the screening port 62, and then slide from the unloading chute 63 into the receiving box 64, thereby screening the angle of the spring to prevent springs with incorrect placement angles from entering the processing conveyor belt 2, resulting in processing failure.

[0036] Furthermore, guide bars 81 are respectively provided on both sides of the processing conveyor belt 2. The two guide bars 81 are vertically installed on both sides of the surface of the processing conveyor belt 2, and the distance between the two guide bars 81 is slightly greater than the length of the spring, so as to guide the spring and prevent it from detaching from the processing conveyor belt 2 during movement.

[0037] Furthermore, a movable plate 82 is fixedly connected to the side of the guide bar 81 away from the processing conveyor belt 2, and an adjustment hole 83 is opened on the movable plate 82, and a handle screw 84 is provided through the adjustment hole 83, and a clamping ring 85 is threadedly connected to the handle screw 84. A clamping block 86 is fixedly connected to the surface of the frame 1, and the handle screw 84 is provided through the adjustment hole 83 and is threadedly connected to the clamping block 86. By loosening the handle screw 84, the clamping ring 85 releases the clamping block 86, and the movable plate 82 can be moved at this time, thereby adjusting the position of the guide bar 81, and the distance between the two guide bars 81 can be adjusted. After adjusting to a suitable position, the handle screw 84 is tightened to compress the clamping ring 85 and the clamping block 86, and the movable plate 82 is fixed.

[0038] In addition, guide rails and sliders may be provided at the bottom of the movable plate 82 for guiding and moving.

[0039] Furthermore, the frame 1 is provided with a dust hood 71 below the grinding wheel 39, one end of the dust hood 71 is connected to a dust suction pipe 73, and one end of the dust hood 71 close to the grinding wheel 39 is fixedly connected to a filter screen 72. A fan or dust suction device is connected through the dust suction pipe 73, so that negative pressure is formed in the dust hood 71, and the debris generated by the grinding wheel 39 during chamfering is sucked into the dust hood 71 to protect the workshop environment.

[0040] The working principle of the utility model is as follows: before work, the position of the grinding wheel 39 is adjusted according to the chamfering amount required, and the distance between the grinding wheel 39 and the processing conveyor belt 2 is adjusted by the first linear adjustment mechanism 32, so that the grinding wheel 39 is close to or away from the processing conveyor belt 2, and then the distance between the grinding wheel 39 and the spring is adjusted by the second linear adjustment mechanism 34, so as to adjust the chamfering amount. After adjusting the position of the grinding wheel 39, the grinding wheel 39 is driven to rotate at high speed by the driving mechanism. At this time, the spring is loaded by the vibrating loading tray 4, and loaded to the bottom of the transfer rack mechanism. The spring is clamped and placed on the loading bottom plate 61 of the screening mechanism 6 by the transfer mechanism 5. The spring rolls into the processing conveyor belt 2 by the action of gravity, and the spring is driven to move by the processing conveyor belt 2. The spring passes through four chamfering devices 3 in succession, and the two ends of the spring are chamfered by four grinding wheels 39. After the chamfering operation is completed, it leaves the end of the processing conveyor belt 2.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A four-station external chamfering machine for springs, characterized in that: include: A frame, the surface of which is fixedly connected to a processing conveyor belt, four chamfering devices are staggered on both sides of the processing conveyor belt, a transfer mechanism is provided at the input end of the processing conveyor belt, a vibrating loading tray is provided at one end of the transfer mechanism away from the processing conveyor belt, and the chamfering device includes a grinding wheel, which is arranged at an angle of 45 degrees to the processing conveyor belt.

2. A four-station external chamfering machine for springs according to claim 1, characterized in that: The chamfering device includes a base, a first linear adjustment mechanism is arranged on the surface of the base, the first linear adjustment mechanism is transmission-connected with a grinding wheel mounting bracket, the surface of the grinding wheel mounting bracket is arranged at a 45-degree angle to the processing conveyor belt, a second linear adjustment mechanism is arranged on the surface of the grinding wheel mounting bracket, the second linear adjustment mechanism is transmission-connected with a translation plate, one end of the translation plate is fixedly connected with a grinding wheel bottom plate, the side of the grinding wheel bottom plate is rotatably connected with a grinding wheel, the surface of the translation plate is fixedly connected with a driving mechanism, and the driving mechanism is transmission-connected with the grinding wheel.

3. A four-station external chamfering machine for springs according to claim 2, characterized in that: The first linear adjustment mechanism includes a first linear guide rail fixedly connected to the surface of the base, a first slider is slidably connected to the first linear guide rail, the surface of the first slider is fixedly connected to the grinding wheel mounting bracket, a first screw rod is rotatably connected to the surface of the base, a first screw rod nut is threadedly connected to the first screw rod, the first screw rod nut is fixedly connected to the bottom of the grinding wheel mounting bracket, and one end of the first screw rod is fixedly connected to a first hand wheel.

4. A four-station external chamfering machine for springs according to claim 3, characterized in that: The second linear adjustment mechanism includes a second linear guide rail fixedly connected to the surface of the grinding wheel mounting bracket, a second slider is slidably connected to the second linear guide rail, the surface of the second slider is fixedly connected to the translation plate, a second screw rod is rotatably connected to the surface of the grinding wheel mounting bracket, a second screw rod nut is threadedly connected to the second screw rod, the second screw rod nut is fixedly connected to the bottom of the translation plate, and one end of the second screw rod is fixedly connected to a second hand wheel.

5. A four-station external chamfering machine for springs according to claim 4, characterized in that: The driving mechanism includes a driving motor fixedly connected to the surface of the translation plate, the output shaft key of the driving motor is connected to a large pulley, the large pulley is connected to a small pulley through a synchronous belt transmission, both sides of the grinding wheel base are fixedly connected to grinding wheel supports, the two ends of the grinding wheel are rotatably connected to the grinding wheel supports through a rotating shaft, and the small pulley is fixedly connected to the rotating shaft.

6. A four-station external chamfering machine for springs according to claim 1, characterized in that: The transfer mechanism includes a transfer support, the top of the transfer support is fixedly connected to a linear slide, the surface of the linear slide is transmission-connected to a transfer cylinder, the output end of the transfer cylinder is fixedly connected to a clamping cylinder, and the output shaft of the clamping cylinder is fixedly connected to a clamping block.

7. A four-station external chamfering machine for springs according to claim 6, characterized in that: A screening mechanism is arranged between the transfer mechanism and the processing conveyor belt, and the screening mechanism includes an inclined loading bottom plate. The loading bottom plate is inclined, and one end of the loading bottom plate is located at the bottom and is arranged against the input end of the processing conveyor belt. A screening port is opened in the middle of the loading bottom plate, a material discharge chute is arranged below the screening port, and a material receiving box is arranged below the bottom end of the material discharge chute.

8. A four-station external chamfering machine for springs according to claim 1, characterized in that: Guide strips are respectively arranged on both sides of the processing conveyor belt.

9. A four-station external chamfering machine for springs according to claim 8, characterized in that: A movable plate is fixedly connected to the side of the guide bar away from the processing conveyor belt, an adjustment hole is opened on the movable plate, a handle screw is penetrated through the adjustment hole, a clamping ring is threadedly connected to the handle screw, a clamping block is fixedly connected to the surface of the frame, the handle screw penetrates the adjustment hole and is threadedly connected to the clamping block.

10. A four-station external chamfering machine for springs according to claim 1, characterized in that: The frame is provided with a dust collecting cover below the grinding wheel, one end of the dust collecting cover is connected with a dust suction pipe, and one end of the dust collecting cover close to the grinding wheel is fixedly connected with a filter screen.

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