CN111545667B

CN111545667B - Metal spring bidirectional elastic sheet forming equipment and forming method thereof

Info

Publication number: CN111545667B
Application number: CN202010421476.8A
Authority: CN
Inventors: 冯赞; 王成; 朱乐平
Original assignee: Suzhou Zhaoneng Precision Spring Hardware Co ltd
Current assignee: Suzhou Zhaoneng Precision Spring Hardware Co ltd
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2021-09-17
Anticipated expiration: 2040-05-18
Also published as: CN111545667A

Abstract

The invention provides a metal spring bidirectional elastic sheet forming device, which comprises a punching mechanism and a forming mechanism, wherein the punching mechanism is arranged on the forming mechanism; the punching mechanism is used for punching and cutting a plurality of prefabricated products which are connected in sequence on a plate wire rod, and comprises a punching upper die and a punching lower die which are matched with each other, and a punching insert matched with the shapes of the prefabricated products is arranged on the punching upper die; the forming mechanism is used for forming the elastic sheet and comprises a base, a forming seat and a forming cutter assembly, the forming seat is installed on the base and comprises a first forming part and a second forming part, the first forming part is used for bending the jaw of the prefabricated product, the second forming part can support the jaw of the next prefabricated product and is provided with a forming cavity for the second forming cutter to move up and down, and the second elastic arm can move to the upper part of the forming cavity; the forming cutter component can bend the first elastic arm upwards and bend the second elastic arm downwards. The invention has high processing efficiency and high processing precision.

Description

Metal spring bidirectional elastic sheet forming equipment and forming method thereof

Technical Field

The invention belongs to the technical field of metal part processing, and particularly relates to metal spring bidirectional elastic sheet forming equipment and a forming method thereof.

Background

The metal elastic sheet is commonly used in flexible connection of mechanical parts and in working conditions requiring repeated disassembly and assembly, for example, as shown in fig. 1 and fig. 2, the metal elastic sheet comprises a frame 110, a first elastic arm 120 and a second elastic arm 130, the frame 110 comprises two claws 111 extending towards the lower left, and the end parts of the claws 111 are provided with hook bodies 112 of lower hooks; the two claws 111 are connected by a connecting piece 113, the left end of the connecting piece 113 is obliquely turned upwards, the roots of the first elastic arm 120 and the second elastic arm 130 are connected with the connecting piece 113, the free ends of the first elastic arm 120 and the second elastic arm 130 extend to the upper left and the lower right respectively, and the first elastic arm 120 and the second elastic arm 130 are bent into an arch structure.

The processing and forming method of the bidirectional elastic sheet generally comprises the steps of firstly punching a plurality of hollowed holes on a thin sheet, then cutting and dividing the thin sheet into semi-finished products according to the shape of the elastic sheet, and then conveying the semi-finished products into a stamping die for stamping and forming.

Disclosure of Invention

The invention aims to provide metal spring bidirectional elastic sheet forming equipment to solve the problems of low processing efficiency and low processing precision of a bidirectional elastic sheet.

The invention also aims to provide a method for forming the bidirectional elastic sheet of the metal spring, which fundamentally replaces the existing bidirectional elastic sheet forming process so as to solve the problems of low processing efficiency and low processing precision of the bidirectional elastic sheet.

The invention provides the following technical scheme:

a metal spring bidirectional elastic sheet forming device comprises a punching mechanism and a forming mechanism;

the punching mechanism is used for punching and cutting a plurality of prefabricated products which are connected in sequence on a plate wire, each prefabricated product comprises a first elastic arm, a second elastic arm and a frame, each frame comprises two claws extending towards the left side and a connecting piece positioned between the two claws, the roots of the first elastic arm and the second elastic arm are connected with the connecting pieces, the free end of the first elastic arm extends towards the left side, and the free end of the second elastic arm extends towards the right side; the punching mechanism comprises a punching upper die and a punching lower die which are matched with each other, and a punching insert matched with the shape of the prefabricated product is arranged on the punching upper die;

the forming mechanism is used for forming the elastic sheet and comprises a base, a forming seat and a forming cutter assembly, and the forming cutter assembly comprises a first forming cutter, a second forming cutter and a fourth forming cutter; the forming seat is arranged on the base and comprises a first forming part and a second forming part which are sequentially connected from left to right, the first forming part is used for bending the clamping jaws of the prefabricated products, the second forming part can support the clamping jaws of the next prefabricated product and is provided with a forming cavity for the second forming cutter to move up and down, and the second elastic arm can move to the position above the forming cavity; the forming cutter component can bend the first elastic arm towards the upper side and bend the second elastic arm towards the lower side.

Furthermore, the first forming cutter and the second forming cutter are oppositely arranged along the vertical direction, and a concave first forming wall for bending the first elastic arm is arranged on the bottom end face of the first forming cutter; the second forming cutter can move up and down in the forming cavity, and the top end face of the second forming cutter is provided with a concave second forming wall matched with the second elastic arm and a convex third forming wall for bending the root of the first elastic arm.

Preferably, the top end surface of the second forming tool is an inclined surface with a high left and a low right, and the bottom end surface of the first forming tool can be attached to the top end surface of the second forming tool to bend the connecting piece of the prefabricated product upwards.

Preferably, an insert cavity with an open top is arranged in the second forming cutter along the vertical direction, a female die insert is fixedly mounted in the insert cavity, and the top surface of the female die insert is recessed in the insert cavity to form a second forming wall.

Preferably, a downwardly convex cutting part is arranged on the left side of the bottom of the first forming cutter, a cutting cavity matched with the cutting part is arranged on the forming seat, and the cutting part can cut off the formed elastic sheet from the plate wire.

Furthermore, the forming knife assembly further comprises a third forming knife, a fourth forming wall matched with the first forming wall is arranged at the top of the third forming knife, and the third forming knife can move upwards to bend the first elastic arm upwards together with the first forming knife.

Furthermore, the forming cutter assembly further comprises a fourth forming cutter positioned above the right of the forming seat, a fifth forming wall matched with the second forming wall is arranged at the bottom end of the fourth forming cutter, and the fifth forming wall and the second forming wall can bend the second elastic arm downwards together.

Further, a fixed seat is installed on the base, and two guide holes for guiding the first forming cutter and the fourth forming cutter respectively are formed in the fixed seat; the first forming cutter is provided with a clearance groove with an opening at the right side, the clearance groove penetrates through the first forming cutter downwards, and the clearance groove can provide a moving space for the movement of the fourth forming cutter.

Furthermore, the forming cutter assembly further comprises a fifth forming cutter and a sixth forming cutter which are positioned on the upper left of the forming seat, the fifth forming cutter is matched with the first forming part of the forming seat to bend the clamping jaw downwards, and the sixth forming cutter is matched with the left side wall of the first forming part to bend the end part of the clamping jaw to form a hook.

The forming method of the metal spring bidirectional elastic sheet forming equipment comprises the following steps:

s1, straightening a plate wire rod and then feeding the plate wire rod into a punching mechanism, and sequentially punching a plurality of prefabricated products on the plate wire rod;

s2, feeding the plate wire rod into a forming mechanism according to a fixed length, and enabling the prefabricated product at the leftmost end to be located on a second forming part of a forming seat;

s3, moving the first forming cutter downwards, moving the second forming cutter upwards, moving the fourth forming cutter to the left and downwards, and bending the roots of the second elastic arm, the connecting sheet and the first elastic arm by matching with the first forming cutter;

s4, moving a third forming cutter upwards to bend the free end of the first elastic arm in a matching way with the first forming cutter;

s5, retreating and resetting the first forming cutter, the second forming cutter, the third forming cutter and the fourth forming cutter;

s6, continuously pushing the prefabricated product at the leftmost end leftwards by a stroke;

s7, the fifth forming knife acts to bend the clamping jaw downwards in a matching manner with the first forming part of the forming seat, and then the clamping jaw is kept in a pressing state;

s8, the sixth forming knife acts to bend the end part of the clamping jaw in a matching way with the first forming part of the forming seat to form a hook, and the pressing state is kept;

s9, when the sixth forming cutter acts, the material cutting part of the first forming cutter is matched with the material cutting cavity of the forming seat, and the plate wire is cut off to separate the previous elastic sheet from the plate wire;

s10, the first forming cutter continues to descend, and the steps S3 to S4 are repeated;

s11, retreating and resetting a first forming cutter, a second forming cutter, a third forming cutter, a fourth forming cutter, a fifth forming cutter and a sixth forming cutter; taking away the previous product;

s12, conveying the plate wire to the left again according to the fixed length, repeating the steps from S7 to S11, and forming the next elastic sheet.

The invention has the beneficial effects that:

the equipment integrates the punching mechanism and the forming mechanism, firstly, the plate and wire materials are punched and cut into prefabricated products which are connected in sequence, and then the prefabricated products are sent into the forming mechanism to be bent and formed, so that the equipment can continuously punch and form the plate and wire materials, and replaces the step-by-step processing technology that the plate is punched on the punching equipment firstly and then the semi-finished products are conveyed to the forming machine to be bent and formed, and the processing efficiency is improved; the equipment does not need to repeatedly position the workpiece, and improves the processing precision.

The forming mechanism skillfully designs the structures and the positions of the forming cutters by utilizing the structure of the elastic sheet, and punches the first elastic arm and the second elastic arm on the plate wire rod, the forming cutters are not interfered with each other and are smoothly matched, and the first elastic arm and the second elastic arm can be synchronously bent and formed, so that the equipment works stably and the processing efficiency is high.

The forming seat of the equipment comprises a first forming part and a second forming part, and the two forming parts can simultaneously process two products, so that the processing efficiency is further improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic perspective view of the spring plate of the present invention;

FIG. 2 is a schematic view of the spring plate of the present invention;

FIG. 3 is a schematic view of the overall structure of the present invention;

FIG. 4 is a schematic structural view of the die cutting mechanism of the present invention;

FIG. 5 is a schematic perspective view of the forming mechanism of the present invention;

FIG. 6 is a front view of the forming mechanism of the present invention;

FIG. 7 is a schematic perspective view of the relative position of a second forming tool and a fourth forming tool embodying the present invention;

FIG. 8 is a schematic front view of the relative position of a second forming tool and a fourth forming tool embodying the present invention;

FIG. 9 is a schematic view of a portion of the forming mechanism of the present invention;

FIG. 10 is a schematic view in partial perspective of the forming mechanism of the present invention;

FIG. 11 is a schematic top view of a first blade of the present invention;

fig. 12 is a schematic structural view of the telescopic driving device and the carrier rod of the present invention.

Labeled as:

100 spring pieces; 110. a frame; 111. a claw; 112. a hook-shaped body; 113. connecting sheets; 120. a first elastic arm; 130. a second elastic arm;

200. a feeding mechanism; 210. a support plate; 220. a cover plate;

300. a punching mechanism; 310. punching an upper die; 311. a first die cutting insert; 312. a second die cutting insert; 313. third punching the insert; 320. punching a lower die; 321. punching a forming cavity;

400. a molding mechanism;

410. a base; 411. an ejection aperture;

420. forming a base; 421. a first molding section; 4211. a first avoidance slot; 4212. a second avoidance slot; 422. a second molding section; 423. a material cutting cavity; 4221. forming a cavity;

431. a first forming knife; 4311. a first forming wall; 4312. a material cutting part; 4313. an empty avoiding groove; 4314. a pressing part; 432. a second forming knife; 4321. a second forming wall; 4322. a third forming wall; 4323. an insert cavity; 4324. a concave die insert; 433. a third forming knife; 4331. a fourth forming wall; 434. a fourth forming blade; 4341. a fifth forming wall; 435. a fifth forming knife; 436. a sixth forming blade;

440. a fixed seat; 441. a guide hole;

450. a telescopic driving device; 451. a top rod;

500. and (4) performing.

Detailed Description

The present embodiment provides a forming apparatus of a metal spring bidirectional elastic sheet, the structure of the elastic sheet is as shown in fig. 1 and fig. 2, the elastic sheet includes a frame 110, a first elastic arm 120 and a second elastic arm 130, the frame 110 includes two claws 111 extending to the lower left, and the end of the claw 111 is provided with a hook 112 of a lower hook; the two claws 111 are connected by a connecting piece 113, the left end of the connecting piece 113 is turned up, the roots of the first elastic arm 120 and the second elastic arm 130 are connected with the connecting piece 113, the free end of the first elastic arm 120 extends towards the left upper part, the free end of the second elastic arm 130 extends towards the right lower part, and the first elastic arm 120 and the second elastic arm 130 are bent into an arch structure.

The molding equipment of the metal spring bidirectional elastic sheet comprises a feeding mechanism 200, a punching mechanism 300 and a molding mechanism 400.

Referring to fig. 3, the feeding mechanism 200 intermittently feeds the wire rods to the punching mechanism 300 and the forming mechanism 400 in a fixed length in sequence, the stepping motor of the feeding mechanism 200 drives the clamping plates to clamp the wire rods for a distance, then the clamping plates release the wire rods, the stepping motor rotates reversely to make the clamping plates move back and reset, and the feeding operation is repeated by the stepping motor when the next operation beat occurs. The feeding mechanism 200 includes a supporting plate 210 and a cover plate 220, the supporting plate 210 is used for supporting the plate and wire, a positioning groove for guiding the movement of the plate and wire is disposed on the surface of the supporting plate 210, and the cover plate 220 can cover the plate and wire and apply a certain pressure to the plate and wire to keep the plate and wire in a straight state.

Referring to fig. 4, the punching mechanism 300 is used for punching a plurality of sequentially connected preforms 500 on a flat wire, the preforms 500 are processed by removing excess material from the flat wire, and the shapes of the preforms 500 correspond to the shapes of the first elastic arm 120, the second elastic arm 130 and the frame 110 of the elastic sheet 100, and the overall shape is a dovetail shape with a planar structure. It should be noted that, for the convenience of description, the structural components of the preform 500 corresponding to the finished product of the dome sheet 100 are referred to as the same components, for example: the first elastic arm of the prefabricated product is in a plane shape, and the first elastic arm of the finished elastic sheet is in a bent shape and is called as the first elastic arm hereinafter.

The forming mechanism 400 is used for bending the preform 500 into a formed spring plate according to a specific forming structure and a specific time sequence.

The structure and operation of the punching mechanism and the forming mechanism of the present invention will be described in detail below.

Referring to fig. 4, the punching mechanism 300 includes an upper punching die 310 and a lower punching die 320 that are matched with each other, the upper punching die 310 is mounted with a plurality of punching inserts that match with the shape of the preform, and the punching inserts include a first punching insert 311, a second punching insert 312, and a third punching insert 313 that are sequentially distributed from right to left (i.e., from the feeding side to the forming mechanism side), wherein the first punching insert 311 is capable of punching the second elastic arm 130 on the sheet material, and the second punching insert 312 and the third punching insert 313 are capable of punching the first elastic arm 120 and the connecting piece 113 on the sheet material. The punching lower die 320 is provided with a punching molding cavity 321 matched with each punching insert, and the punching inserts perform punching processing on three prefabricated products at the same time once.

Referring to fig. 5 and 6, the forming mechanism 400 includes a base 410, a forming base 420 and a forming blade assembly. The forming base 420 is mounted on the base 410 through screws, a first forming portion 421 and a second forming portion 422 which are connected in sequence from left to right are arranged at the top of the forming base 420, the first forming portion 421 is used for bending the jaw 111 of the previous preform and the hook-shaped body 112 at the front end of the forming jaw, and the second forming portion 422 is used for matching with the forming knife assembly to bend two elastic arms and connecting pieces of the next preform.

Specifically, referring to fig. 10, the second forming portion 422 can support the jaws of the next preform, a forming cavity 4221 for the second forming knife to move up and down is formed in the forming seat at the second forming portion 422, the forming cavity 4221 vertically penetrates through the forming seat 420, and the second elastic arm 130 can move to above the forming cavity 4221; the forming blade assembly may be bent upward by the first resilient arm 120 and downward by the second resilient arm 130, respectively.

Further, the forming blade assembly includes a first forming blade 431 and a second forming blade 432 which are oppositely arranged along the up-down direction, a fixing seat 440 is installed on the base 410 right above the forming seat 420 through a screw, the first forming blade 431 is installed in a guide hole of the fixing seat 440 in a vertically slidable manner, and the second forming blade 432 is installed in a forming cavity 4221 of the forming seat 420 in a vertically slidable manner.

Referring to fig. 9, a bottom end surface of the first forming blade 431 is provided with a concave first forming wall 4311 for bending the first elastic arm 120. Referring to fig. 7 and 8, the top end surface of the second forming blade 432 is provided with a concave second forming wall 4321 adapted to the second elastic arm 130 of the finished product, and a convex third forming wall 4322 for bending the root of the first elastic arm 120. The top end surface of the second forming knife 432 is an inclined surface with a higher left and a lower right, and the bottom end surface of the first forming knife 431 can be attached to the top end surface of the second forming knife 432 to bend the connecting sheet of the preform upwards.

Referring to fig. 7 and 8, an insert cavity 4323 with an open top is vertically formed in the second forming tool 432, a female mold insert 4324 is fixedly installed in the insert cavity 4323 by a pin, and a top surface of the female mold insert 4324 is recessed in the insert cavity 4323 to form a second forming wall 4321. The second forming cutter 432 is of a split structure of the female die insert 4324, only the insert cavity 4323 needs to be cut on line on the second forming cutter 432 during processing, and then the female die insert 4324 is installed in the insert cavity 4323, so that a groove structure of a second forming wall does not need to be electrically ignited on the second forming cutter 432, the processing is convenient, the processing cost is reduced, in addition, the female die insert 4324 which is worn after long-term use can be detached and replaced, the whole second forming cutter does not need to be replaced, and the maintenance cost of the equipment is further saved.

Referring to fig. 9 and 10, a downwardly convex blanking portion 4312 is disposed on the left side of the bottom of the first forming knife 431, a blanking cavity 423 matched with the blanking portion 4312 is disposed on the forming seat 420, the blanking cavity 423 penetrates through the forming seat 420 along the vertical direction, the blanking portion 4312 is matched with the blanking cavity 423 to cut off the previous spring sheet from the plate wire, and the waste material of the cutting portion falls out of the forming mechanism from the blanking cavity 423 freely. The bottom height of the material cutting portion 4312 is slightly lower than the height of the forming wall of the first forming cutter, the first forming cutter 431 can firstly cut off the plate wire and then continuously move downwards, and the subsequent preform is bent, that is, the first forming cutter 431 only needs to act once to complete the material cutting and forming operation.

Referring to fig. 5 and 10, in order to cut and bend the plate wire more reliably, a horizontal pressing portion 4314 is provided at the right side of the bottom of the first forming knife 431, and the pressing portion 4314 can press the tail of the next preform to keep the tail of the preform fixed, thereby ensuring stable and accurate cutting and bending actions.

Referring to fig. 5 and 10, the forming knife assembly further includes a third forming knife 433, the third forming knife 433 is disposed in parallel with the second forming knife 432 and is closely attached to the left side of the second forming knife 432, a fourth forming wall 4331 matching with the first forming wall 4311 is disposed at the top of the third forming knife 433, and the third forming knife 433 can move upward to bend the free end of the first elastic arm 120 upward together with the first forming knife 431.

The forming knife assembly further comprises a fourth forming knife 434 located at the upper right of the forming seat, a fifth forming wall 4341 matched with the second forming wall 4321 is arranged at the bottom end of the fourth forming knife 434, and the fifth forming wall 4341 and the second forming wall 4321 can jointly bend the second elastic arm 130 downwards.

Referring to fig. 9, two guide holes 441 are formed in the fixing base 440 for guiding the first forming knife 431 and the fourth forming knife 434, respectively, and the fourth forming knife 434 can move along the corresponding guide hole to the left and downward direction to bend the second elastic arm 130. Referring to fig. 9 and 11, in order to prevent the first forming knife 431 from interfering with the oblique movement of the fourth forming knife 434, a clearance groove 4313 with an opening on the right side is formed in the first forming knife 431, the clearance groove 4313 penetrates the first forming knife 431 downwards, the clearance groove 4313 can avoid the fourth forming knife 434 to provide a moving space for the movement, so that the first forming knife 431 and the fourth forming knife 434 can be matched with the second forming knife 432 to bend the preform at the same time, and the forming efficiency is improved.

Further, referring to fig. 5 and 6, the forming blade assembly further includes a fifth forming blade 435 and a sixth forming blade 436 positioned above and to the left of the forming base, which cooperate with the first forming portion 421 of the forming base 420 to bend the jaws and hooks of the previous preform. Specifically, the fifth forming blade 435 cooperates with the first forming portion 421 of the forming base 420 to bend the jaw 111 downward, and the sixth forming blade 436 cooperates with the left side wall of the first forming portion 421 to bend the end of the jaw to form the hook 112.

In order to smoothly move the bent preform 500 to the left side to the first forming portion 421, a first escape groove 4211 is formed in the first forming portion 421 in the left-right direction, and the second elastic arm 130 bent downward can smoothly pass through the first escape groove 4211.

Referring to fig. 12, in order to facilitate the product blanking, a telescopic driving device 450 is installed on the back surface of the base 410, a push rod 451 is installed on an output rod of the telescopic driving device 450, an ejection hole 411 through which the push rod 451 extends is formed in the base 410, the telescopic driving device 450 can drive the push rod 451 to pass forward through the ejection hole 411 to eject the processed spring sheet 100, in order to enable the push rod 451 to smoothly push the spring sheet away from the first molding part, a second avoidance groove 4212 is formed in the first molding part 421 along the front-back direction, and the second spring arm 130 bent downward can smoothly pass through the second avoidance groove 4212 and then slide down from the molding base 420.

the plate wire rod is fed into the punching mechanism 300 after being straightened, and the second elastic arm, the connecting piece, the first elastic arm and the claw of the prefabricated product are punched on the plate wire rod to gradually form a plurality of continuous prefabricated products along with the forward movement of the plate wire rod; the punching action tempo of the plate and wire is matched with the forming action tempo of the next procedure;

the feeding mechanism 200 feeds the plate wire material into the forming mechanism 400 according to fixed length, so that the prefabricated product at the leftmost end is positioned on the second forming part 422 of the forming seat 420;

the first forming cutter 431 moves downwards, the second forming cutter 432 moves upwards, the fourth forming cutter 434 moves towards the left lower side, and the root parts of the second elastic arm, the connecting sheet and the first elastic arm are bent by matching with the first forming cutter 431;

the third forming knife 433 moves upwards to bend the free end of the first elastic arm in a matching way with the first forming knife 431;

the first forming knife 431, the second forming knife 432, the third forming knife 433 and the fourth forming knife 434 are retracted and reset;

the feeding mechanism 200 continuously pushes the leftmost preform to the left by a stroke to the first forming portion 421 of the forming base 420, and the next preform is located on the second forming portion 422;

the fifth forming knife 435 is actuated to bend the jaw 111 downward in cooperation with the first forming portion 421, and then to maintain the pressed state;

the sixth forming knife 436 operates to bend the end of the claw 111 in cooperation with the first forming portion 421 to form the hook 112, and the elastic piece is formed while keeping the pressed state;

while the sixth forming knife 436 is in operation, the material cutting part 4312 of the first forming knife 431 is engaged with the material cutting cavity 423 of the forming base 420 to cut the plate wire material and separate the former spring plate from the plate wire material;

the first forming knife 431 continues to move downwards, the second forming knife 432 moves upwards at the same time, the fourth forming knife 434 moves towards the left lower part, and the second elastic arm 130, the connecting piece 113 and the root part of the first elastic arm 120 of the next elastic sheet are bent by matching with the first forming knife 431;

the third forming knife 433 moves upward and is matched with the first forming knife 431 to bend the free end of the first elastic arm 120;

the first forming knife 431, the second forming knife 432, the third forming knife 433, the fourth forming knife 434, the fifth forming knife 435 and the sixth forming knife 436 are retracted and reset;

the telescopic driving device 450 acts to push the former spring plate out of the forming seat 420 by the ejector rod 451 and take away the product; the telescopic driving device 450 is reset in a backward mode;

the feeding mechanism 200 again feeds the plate wire forward according to the fixed length to form the next group of elastic sheets.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A metal spring bidirectional elastic sheet forming device is characterized by comprising a punching mechanism and a forming mechanism;

the forming mechanism is used for forming the elastic sheet and comprises a base, a forming seat and a forming cutter assembly, and the forming cutter assembly comprises a first forming cutter, a second forming cutter and a fourth forming cutter; the forming seat is installed on the base and comprises a first forming part and a second forming part which are sequentially connected from left to right, the first forming part is used for bending the clamping jaws of the preforms, the second forming part can support the clamping jaws of the next preform, a forming cavity for the second forming knife to move up and down is formed in the second forming part, and the second elastic arm can move to the position above the forming cavity; the forming cutter assembly can bend the first elastic arm upwards and bend the second elastic arm downwards; the first forming part and the second forming part can simultaneously process two preforms adjacent to each other left and right;

the first forming cutter and the second forming cutter are oppositely arranged along the vertical direction, and a concave first forming wall for bending the first elastic arm is arranged on the bottom end face of the first forming cutter; the second forming cutter can move up and down in the forming cavity, and the top end face of the second forming cutter is provided with a concave second forming wall matched with the second elastic arm and a convex third forming wall for bending the root part of the first elastic arm; the bottom end surface of the first forming cutter can be attached to the top end surface of the second forming cutter to bend the connecting sheet of the prefabricated product upwards;

the fourth forming knife is positioned above the right side of the forming seat, a fifth forming wall matched with the second forming wall is arranged at the bottom end of the fourth forming knife, and the fifth forming wall and the second forming wall can jointly bend the second elastic arm downwards;

a fixed seat is arranged on the base, and two guide holes for guiding the first forming cutter and the fourth forming cutter respectively are formed in the fixed seat; the first forming cutter is provided with a clearance groove with an opening at the right side, the clearance groove penetrates through the first forming cutter downwards, and the clearance groove can provide a moving space for the movement of the fourth forming cutter;

the right side of the bottom of the first forming knife is provided with a horizontal pressing part, and the pressing part can press the tail of the next prefabricated product to keep the tail of the prefabricated product fixed.

2. The metal spring bi-directional leaf spring forming device of claim 1, wherein the top end face of the second forming cutter is an inclined face with a higher left side and a lower right side.

3. The apparatus according to claim 1, wherein the second forming blade has an insert cavity with an open top along a vertical direction, a cavity insert is fixedly installed in the insert cavity, and a top surface of the cavity insert is recessed in the insert cavity to form a second forming wall.

4. The metal spring bidirectional shrapnel forming device of claim 1, wherein a downward convex blanking part is arranged at the left side of the bottom of the first forming cutter, a blanking cavity matched with the blanking part is arranged on the forming seat, and the blanking part can cut off the formed shrapnel from a plate wire.

5. The metal spring bi-directional leaf spring forming device according to claim 4, wherein the forming knife assembly further comprises a third forming knife, a fourth forming wall matched with the first forming wall is arranged at the top of the third forming knife, and the third forming knife can move upwards to bend the first elastic arm together with the first forming knife.

6. The metal spring bidirectional elastic sheet forming device according to claim 5, wherein the forming knife assembly further comprises a fifth forming knife and a sixth forming knife which are positioned above and to the left of the forming seat, the fifth forming knife cooperates with the first forming portion of the forming seat to bend the jaw downwards, and the sixth forming knife cooperates with the left side wall of the first forming portion to bend the end of the jaw to form a hook.

7. The forming method of the metal spring bidirectional elastic sheet forming equipment of claim 6, characterized by comprising the following steps: