CN113414655B - Spring end face grinding machine and spring manufacturing process applying grinding machine - Google Patents

Abstract

The application relates to a spring end face grinding machine and a spring manufacturing process applying the grinding machine, and the spring end face grinding machine comprises a rack, wherein a feeding channel is formed in the rack, a feeding assembly is arranged on the rack, and the feeding assembly comprises a sliding plate, two placing frames for placing springs, a driving piece for driving the placing frames to rotate and a driving piece for driving the sliding plate to move; the shifting board slides and connects in the pay-off passageway, two the rack is all rotated and is connected on the shifting board. This application has the effect that improves operating personnel and grinds flat efficiency to spring both ends face.

Description

Spring end face grinding machine and spring manufacturing process applying grinding machine

Technical Field

The application relates to the field of spring processing, in particular to a spring end face grinding machine and a spring manufacturing process applying the grinding machine.

Background

The end parts at the two ends of the spring are ground flat, so that half-turn spiral can be eliminated, the contact area of the spring and a supporting surface matched with the spring is increased, and the spring does not generate axial line distortion within the working elastic force range as much as possible.

The patent of the Chinese utility model with the granted publication number of CN209717217U discloses a spring grinding machine, which comprises a frame, a mounting disc rotationally connected on the frame, a driving motor arranged on the frame and used for driving the mounting disc to rotate, and a spring grinding device arranged on the frame and used for grinding the end of a spring, wherein the mounting disc is uniformly distributed in a plurality of mounting grooves for placing the spring along a rotational axis; still be provided with the bits device of blowing in the frame, the bits device of blowing is including setting up fan in the frame, connecting in the air duct of fan air outlet and setting up in the air duct and keeping away from the blowing pipe of fan one end, and the wind gap of blowing pipe sets up towards between spring grinding device and the mounting disc. This application has the effect that improves spring end face precision of polishing.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: after an end face of the spring is ground flat by an operator, the machine needs to be stopped by the operator, the springs are inverted to grind flat the other end face of the spring, and the working efficiency is low.

Disclosure of Invention

In order to improve the efficiency that operating personnel ground the flat to spring both ends face, this application provides a spring end face polisher and applied this polisher the spring manufacturing process.

First aspect, the application provides a spring terminal surface polisher, adopts following technical scheme:

a spring end face grinding machine comprises a rack, wherein a feeding channel is formed in the rack, a feeding assembly is arranged on the rack and comprises a sliding plate, two placing frames for placing springs, a driving piece for driving the placing frames to rotate and a driving piece for driving the sliding plate to move; the shifting board slides and connects in the pay-off passageway, two the rack is all rotated and is connected on the shifting board.

By adopting the technical scheme, when the spring grinding machine is used, an operator places a plurality of springs on a placing frame, then drives the sliding plate to move so that the placing frame and the plurality of springs slide into the feeding channel, the placing frame positioned in the feeding channel moves out, and the grinding disc in the feeding channel grinds one ends of the springs on the placing frame; an operator places a plurality of springs on the other placing frame, drives the sliding plate to move after one end of the spring positioned in the feeding channel is ground flat, so that the spring positioned in the feeding channel slides out of the feeding channel, and the spring positioned outside the feeding channel is fed into the feeding channel to be end ground; then, an operator inverts the end-ground spring to enable the other end of the spring to face upwards; the shutdown time is reduced, and the working efficiency is greatly improved.

Optionally, the driving member includes a driving gear, two driven gears and a driving motor for driving the driving gear to rotate; the driving gear is rotationally connected to the rack; two driven gear and two rack one-to-one, driven gear sets up on the rack, driven gear meshes with the driving gear mutually.

Through adopting above-mentioned technical scheme, drive the piece during use and drive the reciprocating sliding of slide plate for driven gear and driving gear intermittent type nature's meshing realizes that the driving piece intermittent type drives two rack rotations, simple structure when realizing driving piece and driving two rack removals on the slide plate.

Optionally, the frame is rotatably connected with a stop gate, and the stop gate is used for sealing two ends of the feeding channel.

By adopting the technical scheme, through the stop door, the condition that the spark generated by grinding in the feeding channel splashes to the operator is reduced, and the safety of the operator during operation is improved.

Optionally, a driving assembly for driving the blocking door to open or close is arranged on the rack, and the driving assembly includes a first rack, a second rack, a transmission gear, a transmission structure for driving the first rack and the second rack to move in a direction approaching or departing from each other, and a locking member for maintaining an open or closed state of the blocking door; the transmission gear is arranged on the stop door; the first rack and the second rack are connected with the feeding channel in a sliding mode, and the first rack and the second rack are used for being alternately meshed with the transmission gear.

By adopting the technical scheme, when the sliding plate slides in the feeding channel, the transmission structure drives the first rack to move along the direction close to the transmission gear, the first rack drives the transmission gear to rotate, so that the blocking door is opened, the locking piece maintains the state that the blocking door is opened, and then the first rack is separated from the transmission gear; when the placing frame on the sliding plate slides into the feeding channel, the second rack is meshed with the transmission gear, so that the blocking door is closed, the locking piece maintains the state that the blocking door is closed, the control on the blocking door is realized, the blocking door is not required to be manually opened and closed, and the operation is convenient.

Optionally, the first rack and the second rack are located on the same side of the transmission gear; the transmission structure comprises a steering gear, a first reversing rack and a second reversing rack; the steering gear is rotationally connected to the hole wall of the feeding channel and is positioned on one side, away from the transmission gear, of the first rack; the first reversing rack and the second reversing rack are connected to the hole wall of the feeding channel in a sliding mode along the sliding direction of the first rack, the first reversing rack and the second reversing rack are located on two sides of the steering gear respectively, the first reversing rack and the second reversing rack are meshed with the steering gear, and the first reversing rack is arranged on the sliding plate; the first rack is arranged on the first reversing rack; the second rack is arranged on the second reversing rack.

By adopting the technical scheme, when the feeding device is used, the driving piece drives the sliding plate to slide into the feeding channel, the first rack on the sliding plate drives the transmission gear to rotate and drives the blocking door to open, then the sliding plate drives the first rack on the first reversing rack to be separated from the transmission gear, the locking piece maintains the state that the blocking door is opened, and the first reversing rack drives the second reversing rack to slide along the moving direction opposite to that of the first rack through the steering gear; when the sliding plate slides into the feeding channel, the second gear rack on the second reversing rack drives the transmission gear to rotate and drives the blocking door to close, the locking part maintains the state that the blocking door is opened, the blocking door is opened or closed when the movable placing frame slides into the feeding channel, and operation of operators is facilitated.

Optionally, the locking member includes a rubber layer and a magnet for attaching to the frame; the magnet is arranged on the barrier door; the rubber layer is arranged on the surface of the magnet, which is abutted against the rack.

By adopting the technical scheme, when the transmission structure drives the stop door to be opened, the magnet and the rubber layer on the stop door are adsorbed on the rack, so that the opening state of the stop door is maintained; when the transmission structure drives the blocking door to close, the magnet and the rubber layer on the blocking door are adsorbed on the rack, so that the closing state of the blocking door is maintained; simple structure and convenient operation.

Optionally, the placing frame comprises a placing disc, a supporting disc and a plurality of limiting sleeves; the limiting sleeves are arranged on the placing disc, the supporting disc is arranged on the placing disc, and the supporting disc is rotatably connected to the sliding plate.

Through adopting above-mentioned technical scheme, during the use operating personnel wear to establish a plurality of springs in the stop collar and make spring lower extreme and support disc inconsistent, realize spacing a plurality of springs, make things convenient for operating personnel's operation.

Optionally, a plurality of limiting sleeves are connected to the placing disc in a sliding manner; a plurality of be provided with the go-between on the stop collar, place the disc up end and set up the embedding annular that supplies the go-between to place, be provided with on the stop collar and be used for spacing the locking Assembly in the stop collar with the spring.

Through adopting above-mentioned technical scheme, when operating personnel need invert a plurality of springs, operating personnel only need with the go-between from embedding annular inslot sliding out, rotate 180 degrees with whole go-between afterwards and can realize the inversion to a plurality of springs, make things convenient for operating personnel's operation.

Optionally, the locking assembly includes an elastic clamping ring, the elastic clamping ring is disposed on an inner side wall of the position limiting sleeve, and an inner diameter of the elastic clamping ring gradually decreases along a downward direction.

By adopting the technical scheme, when an operator penetrates a plurality of springs into the limiting sleeve, the inner side wall of the elastic clamping ring guides the springs into the limiting sleeve and clamps the springs to a certain extent; when an operator rotates the limiting sleeves by 180 degrees, the elastic clamping ring limits the spring; after the two ends of the spring are ground flat, the spring is guided out of the limiting sleeve by the inverted elastic clamping ring, so that the operation of an operator is facilitated.

In a second aspect, the present application provides a spring manufacturing process, which adopts the following technical scheme:

s1: quenching, namely quenching the raw materials;

s2: tempering, namely tempering the quenched metal;

s3: coiling the spring, namely rolling the tempered raw material into a semi-finished spring;

s4: grinding end faces of the semi-finished spring, wherein the two end faces of the semi-finished spring are ground flat by the spring end face grinding machine in any one of the first aspect;

s5: tempering, namely tempering the semi-finished spring with two ends polished flat again;

s6: surface treatment, namely removing impurities on the surface of the semi-finished spring;

s7: inspecting, namely inspecting the semi-finished spring with the surface treated;

s8: spraying plastics, namely spraying a protective layer on the surface of the semi-finished spring after the inspection is finished to obtain a finished spring;

s9: and (7) packaging and warehousing.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the feeding assembly is used for realizing that when one end face of a spring on one placing rack is ground, the spring on the other placing rack is inverted, so that the working efficiency is greatly improved;

2. the driving component is used for opening or closing the stop door while the driving component drives the sliding plate to move;

3. the springs are convenient for operators to invert through the placing rack, the connecting ring and the locking assembly.

Drawings

Fig. 1 is a schematic structural diagram of a spring end face grinding machine according to the present application.

FIG. 2 is a partial view of FIG. 1 showing the structure of the feed assembly.

Fig. 3 is a schematic structural view of the rack of fig. 2.

Fig. 4 is a cross-sectional view a-a of fig. 2, showing the structure of the driving member.

Fig. 5 is a schematic structural view of the driving assembly of fig. 1.

Fig. 6 is an enlarged view of fig. 1 at B to show the structure of the locker.

Reference numerals: 1. a frame; 11. a feed channel; 12. a blocking door; 13. mounting grooves; 2. a feeding assembly; 21. a slide plate; 22. placing a rack; 221. placing the disc; 222. a support disc; 223. a limiting sleeve; 224. a rotating shaft; 225. a slip through hole; 226. a connecting ring; 227. embedding the ring groove; 228. an elastic clamping ring; 23. a rodless cylinder; 24. a drive member; 241. a driving gear; 242. a driven gear; 243. a drive motor; 3. a drive assembly; 31. a first rack; 32. a second rack; 33. a transmission gear; 34. a transmission structure; 341. a steering gear; 342. a first reversing rack; 343. a second reversing rack; 35. a locking member; 351. a rubber layer; 352. an adsorption column; 353. and a magnet.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses spring terminal surface polisher. Referring to fig. 1, a spring end face grinding machine includes a frame 1, a feeding channel 11 extending along a horizontal direction is provided on the frame 1, two ends of the feeding channel 11 penetrate through the frame 1, a feeding assembly 2 is provided on the frame 1, and two stop doors 12 for covering and closing two ends of the feeding channel 11 are rotatably connected to the frame 1.

Referring to fig. 1 and 2, the feeding assembly 2 includes a sliding plate 21, two placing frames 22 for placing springs, and a driving member for driving the sliding plate 21 to move; the driving part comprises two rodless cylinders 23, the length directions of the two rodless cylinders 23 are parallel to the length direction of the feeding channel 11, and the two rodless cylinders 23 are fixedly connected to the inner bottom wall of the feeding channel 11; the sliding plate 21 is fixedly connected to the upper end surfaces of the sliding tables of the two rodless cylinders 23; the two placing frames 22 are distributed along the length direction of the sliding plate 21.

When the spring end grinding device is used, an operator places a spring on one of the placing frames 22, opens the blocking door 12, and drives the sliding plate 21 to move in the direction close to the feeding channel 11 by the rodless cylinder 23, so that one placing frame 22 slides out of the feeding channel 11, the other placing frame 22 slides into the feeding channel 11, and the grinding disc in the feeding channel 11 grinds the spring on the placing frame 22 entering the feeding channel 11; then, an operator places a plurality of springs on the placing frame 22 which slides out of the feeding channel 11, after one end of the spring which is positioned in the feeding channel 11 is ground, the rodless cylinder 23 drives the placing frame 22 which is positioned outside the rack 1 to slide into the feeding channel 11, the spring with one end ground is slid out of the feeding channel 11, the operator inverts the spring, the other end of the spring is ground, and the working efficiency is greatly improved.

Referring to fig. 2 and 3, the placing frame 22 includes a placing disk 221, a supporting disk 222, and six position-limiting sleeves 223.

Referring to fig. 3 and 4, the supporting disk 222 is horizontally disposed, the supporting disk 222 is coaxially and fixedly connected with a rotating shaft 224, and the lower end of the rotating shaft 224 is rotatably connected to the lower end of the sliding plate 21 and penetrates between the sliding plate 21 and the inner bottom wall of the feeding channel 11; the placing disc 221 is located above the supporting disc 222, six sliding through holes 225 which are evenly distributed along the circumferential direction of the axis of the placing disc 221 are formed in the upper end face of the placing disc 221, and the limiting sleeve 223 is vertically connected in the sliding through holes 225 in a sliding mode.

Referring to fig. 2 and 3, the connecting ring 226 is disposed on the plurality of position-limiting sleeves 223, six position-limiting sleeves 223 are disposed in the connecting ring 226, outer sidewalls of the six position-limiting sleeves 223 are fixedly connected to inner sidewalls of the connecting ring 226, and an insertion ring groove 227 for the connecting ring 226 to be placed is formed in an upper surface of the placing disc 221.

Referring to fig. 2 and 4, a locking assembly is disposed in the position limiting sleeve 223, the locking assembly includes an elastic clamping ring 228, the elastic clamping ring 228 is disposed in the position limiting sleeve 223, an outer side wall of the elastic clamping ring 228 is fixedly connected to an inner side wall of the position limiting sleeve 223, and an inner diameter of the elastic clamping ring 228 is gradually reduced in a vertically downward direction.

During the use, operating personnel inverts a plurality of spacing springs, realizes grinding the other end of spring at ordinary times, and operating personnel slides out six stop collars 223 through go-between 226 together and places disc 221, and elasticity joint ring 228 is spacing to the spring centre gripping, and operating personnel rotates go-between 226 180 degrees afterwards, and elasticity joint ring 228 is spacing again to the spring, realizes leading to the spring in six stop collars 223, makes things convenient for operating personnel's operation.

Referring to fig. 2 and 4, the feeding assembly 2 further includes a driving member 24 for driving the rack 22 to rotate, the driving member 24 includes a driving gear 241, two driven gears 242, and a driving motor 243 for driving the driving gear 241 to rotate; the frame 1 is provided with an installation groove 13 along the horizontal direction, and the installation groove 13 is positioned below the feeding channel 11; the driving motor 243 is vertically arranged, the driving motor 243 is fixedly connected to the inner top wall of the mounting groove 13, and an output shaft of the driving motor 243 penetrates into the feeding channel 11; the driving gear 241 is coaxially and fixedly connected with one end of the output shaft of the driving motor 243 penetrating into the feeding channel 11; the two driven gears 242 correspond to the two rotating shafts 224 one by one, the driven gears 242 are coaxially and fixedly connected to the lower ends of the rotating shafts 224, the driven gears 242 and the driving gears 241 are located on the same horizontal plane, and the two driven gears 242 are used for being meshed with the driving gears 241.

Referring to fig. 1 and 5, four blocking doors 12 are provided, every two blocking doors 12 are rotatably connected to one end of the rack 1, and the two blocking doors 12 are used for closing and blocking one end of the feeding channel 11; the frame 1 is provided with a driving assembly 3 for driving the blocking door 12 to open or close, and the driving assembly 3 comprises a first rack 31, a second rack 32, a transmission gear 33, a transmission structure 34 and a locking piece 35; the transmission structure 34 includes a steering gear 341, a first reversing rack 342, and a second reversing rack 343; the transmission gear 33 is horizontally arranged, the transmission gear 33 is fixedly connected to one end of the stop gate 12, and the rotating shaft 224 of the stop gate 12 is coaxially arranged with the axis of the transmission gear 33; the first reversing rack 342 is fixedly connected to one end, close to the stop gate 12, of the sliding table of the rodless cylinder 23, and the length direction of the first reversing rack 342 is parallel to that of the rodless cylinder 23; the steering gear 341 is horizontally arranged, the steering gear 341 is positioned between the transmission gear 33 and the first reversing rack 342, the steering gear 341 is rotationally connected to the inner bottom wall of the feeding channel 11, and the steering gear 341 is meshed with the first reversing rack 342; the length direction of the second reversing rack 343 is parallel to the length direction of the first reversing rack 342, the second reversing rack 343 is located between the steering gear 341 and the transmission gear 33, the second reversing rack 343 is connected to the inner bottom wall of the feeding channel 11 in a sliding manner along the length direction of the first reversing rack 342, and the second reversing rack 343 is meshed with the steering gear 341.

Referring to fig. 1 and 5, the first rack 31 is fixedly connected to one end of the first reversing rack 342 close to the transmission gear 33, the first rack 31 is located above the second reversing rack 343, and the first rack 31 is used for being meshed with the transmission gear 33; the second rack 32 is fixedly connected to one end of the second direction changing rack 343 close to the transmission gear 33, and the second rack 32 is used for being meshed with the transmission gear 33.

Referring to fig. 1 and 6, the locking member 35 includes a rubber layer 351, an adsorption column 352, and a magnet 353; the adsorption column 352 is vertically arranged, and the adsorption column 352 is fixedly connected to the frame 1; the magnet 353 is fixedly connected to one end, far away from the hinged position of the barrier door 12 and the frame 1, of the barrier door 12, the rubber layer 351 is fixedly connected to the peripheral wall of the magnet 353, and the magnet 353 is used for being adsorbed on the adsorption column 352.

When the device is used, the placing frame 22 located outside the feeding channel 11 moves in the direction close to the feeding channel 11, the rodless cylinder 23 drives the first reversing rack 342 and the first rack 31 to move in the direction close to the feeding channel 11, the first reversing rack 342 drives the second reversing rack 343 to move through the steering gear 341, so that the second rack 32 on the second reversing rack 343 is meshed with the transmission gear 33 and then is separated, the blocking door 12 is driven to be opened, the magnet 353 is adsorbed on the adsorption column 352, the state that the blocking door 12 is opened is maintained, after the placing frame 22 enters the feeding channel 11, the first rack 31 is meshed with the transmission gear 33 and then is separated, the blocking door 12 is closed, the two adjacent blocking doors 12 are adsorbed together through the magnet 353, and the state that the feeding channel 11 is closed by the two blocking doors 12 is maintained.

The implementation principle of the embodiment of the application is as follows: when the device is used, an operator can alternately operate the two placing frames 22 through the rodless cylinder 23, the sliding plate 21 and the two placing frames 22, so that the working efficiency is greatly improved; when the rodless cylinder 23 drives the sliding plate 21 to reciprocate, the barrier door 12 is opened or closed through the driving assembly 3, and convenience of operators is greatly improved.

The embodiment of the application also discloses a spring manufacturing process, which comprises the following process steps:

s1: quenching, namely quenching the raw materials;

s2: tempering, namely tempering the quenched metal;

s3: coiling the spring, namely rolling the tempered raw material into a semi-finished spring;

s4: grinding end faces, namely grinding the two end faces of the semi-finished product spring through the spring end face grinding machine;

s5: tempering, namely tempering the semi-finished spring with two ends polished flat again;

s6: surface treatment, namely removing impurities on the surface of the semi-finished spring;

s7: inspecting, namely inspecting the semi-finished spring with the surface treated;

s8: spraying plastics, namely spraying a protective layer on the surface of the semi-finished spring after the inspection is finished to obtain a finished spring;

s9: and (7) packaging and warehousing.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (6)

1. The utility model provides a spring terminal surface polisher which characterized in that: the feeding mechanism comprises a rack (1), wherein a feeding channel (11) is formed in the rack (1), a feeding assembly (2) is arranged on the rack (1), and the feeding assembly (2) comprises a sliding plate (21), two placing racks (22) for placing springs, a driving piece (24) for driving the placing racks (22) to rotate and a driving piece for driving the sliding plate (21) to move; the sliding plate (21) is connected in the feeding channel (11) in a sliding manner, and the two placing racks (22) are rotationally connected to the sliding plate (21);

the machine frame (1) is rotatably connected with a stop gate (12), and the stop gate (12) is used for sealing two ends of the feeding channel (11);

the rack (1) is provided with a driving assembly (3) for driving the blocking door (12) to open or close, and the driving assembly (3) comprises a first rack (31), a second rack (32), a transmission gear (33), a transmission structure (34) for driving the first rack (31) and the second rack (32) to move along the directions close to or away from each other, and a locking piece (35) for maintaining the opening or closing state of the blocking door (12); the transmission gear (33) is arranged on the stop gate (12); the first rack (31) and the second rack (32) are connected with the feeding channel (11) in a sliding manner, and the first rack (31) and the second rack (32) are used for being alternately meshed with the transmission gear (33);

the first rack (31) and the second rack (32) are positioned on the same side of the transmission gear (33); the transmission structure (34) comprises a steering gear (341), a first reversing rack (342) and a second reversing rack (343); the steering gear (341) is rotationally connected to the hole wall of the feeding channel (11), and the steering gear (341) is positioned on one side of the first rack (31) departing from the transmission gear (33); the first reversing rack (342) and the second reversing rack (343) are connected to the hole wall of the feeding channel (11) in a sliding mode along the first rack (31), the first reversing rack (342) and the second reversing rack (343) are located on two sides of the steering gear (341) respectively, the first reversing rack (342) and the second reversing rack (343) are meshed with the steering gear (341), and the first reversing rack (342) is arranged on the sliding plate (21); the first rack (31) is arranged on the first reversing rack (342); the second rack (32) is arranged on the second reversing rack (343);

the locking piece (35) comprises a rubber layer (351) and a magnet (353) which is adsorbed on the rack (1); the magnet (353) is arranged on the blocking door (12); the rubber layer (351) is arranged on the surface of the magnet (353) which is abutted against the frame (1).

2. The spring face sander of claim 1, wherein: the driving piece (24) comprises a driving gear (241), two driven gears (242) and a driving motor (243) for driving the driving gear (241) to rotate; the driving gear (241) is rotationally connected to the rack (1); the two driven gears (242) are in one-to-one correspondence with the two placement racks (22), the driven gears (242) are arranged on the placement racks (22), and the driven gears (242) are meshed with the driving gears (241).

3. The spring face sander of claim 1, wherein: the placing frame (22) comprises a placing disc (221), a supporting disc (222) and a plurality of limiting sleeves (223); the limiting sleeves (223) are arranged on the placing disc (221), the supporting disc (222) is arranged on the placing disc (221), and the supporting disc (222) is rotatably connected to the sliding plate (21).

4. A spring face sander as set forth in claim 3, wherein: the limiting sleeves (223) are connected to the placing disc (221) in a sliding mode; a plurality of be provided with go-between (226) on stop collar (223), place disc (221) up end and offer embedding annular (227) that supply go-between (226) to place, be provided with on stop collar (223) and be used for spacing the locking Assembly in stop collar (223) with the spring.

5. The spring face sander of claim 4, wherein: the locking assembly comprises an elastic clamping ring (228), the elastic clamping ring (228) is arranged on the inner side wall of the limiting sleeve (223), and the inner diameter of the elastic clamping ring (228) is gradually reduced along the downward direction.

6. A spring manufacturing process is characterized by comprising the following process steps:

s1: quenching, namely quenching the raw materials;

s2: tempering, namely tempering the quenched metal;

s3: coiling the spring, namely rolling the tempered raw material into a semi-finished spring;

s4: end face grinding, wherein the two end faces of the semi-finished spring are ground flat by a spring end face grinding machine according to any one of claims 1 to 5;

s5: tempering, namely tempering the semi-finished spring with two ends polished flat again;

s6: surface treatment, namely removing impurities on the surface of the semi-finished spring;

s7: inspecting, namely inspecting the semi-finished spring with the surface treated;

s8: spraying plastics, namely spraying a protective layer on the surface of the semi-finished spring after the inspection is finished to obtain a finished spring;

s9: and (7) packaging and warehousing.

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