Valve body press forming device

Abstract

The application discloses a valve body stamping forming device, which comprises a rack, a multi-station turret die frame, a plurality of lower die seats, an upper die seat, a fixed-point lubricating mechanism and a locking part. The lower die seat comprises a lower die plate, a male die, a first supporting table and a second supporting table. The upper die seat comprises an upper die plate, a first forming plate, a second forming plate and a pressing plate. When a first boss of a stamping forming workpiece is formed, the locking part is in a locking state, so that the first supporting table and the second supporting table and the first forming plate and the second forming plate are relatively fixed. When a second boss of the stamping forming workpiece is formed, the locking part is in a release state, so that the first supporting table and the second supporting table and the first forming plate and the second forming plate are allowed to relatively move. The valve body stamping forming device can form a double-boss structure at one time through the lower die seat, the upper die seat and the locking part in a switchable state, and can fundamentally eliminate the cumulative error caused by repeated positioning in a multi-process production.

Description

Technical Field

[0001] This invention relates to the field of valve body stamping technology, and more specifically, to a valve body stamping forming apparatus. Background Technology

[0002] The valve body is a critical actuator in a fluid control system. Its main components include the valve cover, valve core, valve seat, and valve stem. The valve cover, as a crucial part of the valve body, typically requires a complex geometry to meet sealing, connection, and strength requirements. A common valve cover structure is one with double bosses, meaning the valve cover body has two concentric protrusions of different heights or diameters. These bosses are used for mounting seals, connecting to the valve body, or providing guidance and support for the valve stem.

[0003] Currently, the mainstream manufacturing method for valve cover parts with multi-level bosses is cold stamping of sheet metal. For double-boob structures, it is usually necessary to design two or more sets of molds and stamp them step by step and multiple times on different presses or different stations of the same press. This results in dispersed production processes, requiring multiple positioning and clamping of the workpiece, which not only leads to low production efficiency but also increases equipment investment and floor space. In addition, since the workpiece needs to be transferred between multiple processes or stations, there are slight errors in each positioning. The cumulative error of multiple positioning will seriously affect the form and position tolerances of the final product, especially the concentricity, parallelism, and relative height difference between the two bosses, which may lead to poor valve cover sealing or assembly difficulties. At the same time, when stamping the second boss in steps, the already formed area of ​​the first boss may undergo slight deformation or displacement due to stress, affecting the dimensional stability of the final product. Therefore, it is necessary to improve this process. Summary of the Invention

[0004] The purpose of this invention is to provide a valve body stamping and forming apparatus to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A valve body stamping forming apparatus, comprising:

[0007] frame;

[0008] A multi-station turret mold frame includes a precision indexing turntable rotatably connected to the surface of the frame. The precision indexing turntable is driven by a servo motor to a cam indexer to achieve intermittent precision positioning.

[0009] A plurality of lower die seats are fixed uniformly in circumference on the surface of the precision indexing turntable, and each lower die seat comprises a lower die plate with a forming cavity in the middle, a punch fixed in the middle of the forming cavity, a first support table sleeved on the outer wall of the punch, and a second support table sleeved on the outer wall of the first support table, and the first support table and the second support table are fixedly connected with the lower die plate through first elastic members;

[0010] The upper die seat is driven by the press to move away from or close to the lower die seat to realize press forming, and comprises an upper die plate fixedly connected to the output end of the press, a first forming plate connected to the bottom of the upper die plate through a guide assembly, a second forming plate sleeved on the outer wall of the first forming plate, and a pressing plate fixed in the inner cavity of the first forming plate through second elastic members, the bottom of the first forming plate has a groove, and the pressing plate is located in the groove, and the second forming plate is fixed to the bottom of the upper die plate.

[0011] A fixed-point lubrication mechanism is integrated in the first forming plate and the second forming plate.

[0012] A locking member is arranged between the first support table and the second support table, and between the first forming plate and the second forming plate.

[0013] When the first boss of the workpiece is formed by stamping, the locking member is in a locked state to keep the first support table and the second support table, and the first forming plate and the second forming plate relatively fixed; when the second boss of the workpiece is formed by stamping, the locking member is in a released state to allow the first support table and the second support table, and the first forming plate and the second forming plate to move relatively.

[0014] Preferably, the locking member comprises drive cylinders fixed on the second support table and the second forming plate respectively, the output end of the drive cylinder is fixedly connected with a locking pin, and the outer wall of the first support table and the first forming plate is provided with a pin hole.

[0015] Preferably, the guide assembly comprises a guide sleeve fixed to the upper die plate and a guide column fixed to the first forming plate, the guide column and the guide sleeve are in sliding fit, the third elastic member is sleeved on the outer part of the guide column, and the two ends of the third elastic member are respectively in abutment with the upper die plate and the first forming plate.

[0016] Preferably, the fixed-point lubrication mechanism comprises an oil channel formed in the interior of the first forming plate and the second forming plate, and an oil groove arranged on the sliding fit surface of the first forming plate and the second forming plate, and the inlet of the oil channel is connected with a concentrated oil supply connector.

[0017] Preferably, the outlet of the oil groove is detachably connected with a lubricating block made of wear-resistant material, and the lubricating block is located at the bottom corner of the first forming plate and the second forming plate respectively.

[0018] Preferably, the lubricating block comprises a forming part, a lubricating part, a cooling part and a clamping part, the forming part is located between the lubricating part and the cooling part, the clamping part is fixed in the oil groove through a fastening screw, the lubricating part, the cooling part and the clamping part are internally distributed with a micro-pore network in communication with each other, the micro-pore network is communicated with the oil channel, and the working surfaces of the lubricating part and the cooling part are provided with reticular or spiral oil guiding lines.

[0019] Preferably, the working surface of the forming part is an arc surface.

[0020] Preferably, the bottom of the upper die plate is fixedly connected with a hydraulic oil cylinder, the output end of the hydraulic oil cylinder is fixedly connected with a punch, the central holes are arranged in the middle of the pressing plate and the male die, a plurality of waste channels are arranged on the precision indexing turntable, and the waste channels are coaxial with the corresponding central holes.

[0021] Preferably, a waste collecting box is arranged on the rack and located directly below the upper die seat.

[0022] Preferably, a feeding mechanism and a discharging mechanism are arranged on the rack, the feeding mechanism and the discharging mechanism each comprise a mounting base fixed on the rack, a linear driving module fixedly installed on the mounting base, a one-way pneumatic cylinder connected to the output end of the linear driving module, a two-way pneumatic cylinder fixed to the output end of the one-way pneumatic cylinder and a mechanical gripper fixed to the output end of the two-way pneumatic cylinder.

[0023] By adopting the foregoing technical scheme, the present application has the following beneficial effects:

[0024] 1. By arranging the relatively movable first support table and the second support table, the first forming plate and the second forming plate, and combining the switchable locking piece, the precise control of material flow is realized, when stamping the first boss, the locking piece is locked, the die seat is deep-drawn as a whole to ensure the shape of the first boss; when stamping the second boss, the locking piece is released, the first support table and the first forming plate can relatively move under the action of the first elastic member and the second elastic member to form flexible forming, which effectively prevents the workpiece from being broken or wrinkled, and is particularly suitable for complex workpieces such as valve covers with multiple bosses, and the double-boss structure is formed at one time, so that the cumulative error caused by repeated positioning in multi-process production is fundamentally eliminated.

[0025] 2、By setting the multi-station turret die frame driven by the cam indexer of the servo motor and the plurality of lower die seats uniformly distributed in the circumference, the multi-station continuous production of the workpiece under a single press is realized, when one station is stamping, the other stations can simultaneously load or unload, making the production process continuous, greatly reducing the production rhythm and improving the efficiency, through the cooperation of the linear drive module, single-stroke cylinder, double-stroke cylinder and mechanical gripper, the automatic grabbing, moving and placing of the workpiece are realized, the structure can realize multi-degree-of-freedom action, accurately feed the blank into the die or take out the finished product, thereby working with the multi-station turret die frame to form a complete automatic production unit, significantly reducing labor costs and ensuring operation safety.

[0026] 3、The lubricating block is divided into a forming part, a lubricating part, a cooling part and a clamping part, realizing multi-functional integration, the internal micro-pore network ensures that the lubricating oil can uniformly penetrate the entire working surface, the oil guide lines on the working surface help the lubricating oil to diffuse on the contact surface to form a uniform oil film, this structure not only reduces friction, and in the process of stamping and forming the workpiece, the lubricating part is located at the front end of the stamping stroke, first outputs lubricating oil to the surface of the workpiece to be processed, then the forming part extrudes the workpiece to form it, finally, the cooling part is located at the rear end of the stamping stroke, outputs lubricating oil to the surface of the just-formed workpiece, which can take away part of the friction heat and workpiece heat, plays a certain cooling role, further improves the forming conditions. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0028] Figure 1 It is a whole structure schematic diagram of the valve body stamping and forming device in an embodiment;

[0029] Figure 2 It is a multi-station turret die frame structure schematic diagram in an embodiment;

[0030] Figure 3 It is a lower die seat structure schematic diagram in an embodiment;

[0031] Figure 4 It is Figure 3 An enlarged schematic diagram of the structure at A in

[0032] Figure 5 It is an upper die seat structure schematic diagram in an embodiment;

[0033] Figure 6 It is a partial structure schematic diagram of the upper die seat in an embodiment;

[0034] Figure 7 It is a first forming plate structure schematic diagram in an embodiment;

[0035] Figure 8 Structure diagram of the pressing plate in an embodiment;

[0036] Figure 9 Structure diagram of the second forming plate in an embodiment;

[0037] Figure 10 Structure diagram of Figure 9 Structure diagram of the structure at B in

[0038] Figure 11 Structure diagram of the lubricating block in an embodiment;

[0039] Figure 12 Structure diagram of the feeding mechanism or discharging mechanism in an embodiment;

[0040] Figure 13 Structure diagram of the valve cover after being stamped and formed in an embodiment.

[0041] Reference signs:

[0042] 100, rack; 101, mounting base; 102, linear drive module; 103, single-stroke cylinder; 104, double-stroke cylinder; 105, mechanical gripper; 110, waste collection box; 120, feeding mechanism; 130, discharging mechanism; 200, multi-station turret mold frame; 210, precision indexing turntable; 220, servo motor; 230, cam indexer; 240, waste passage; 300, lower mold base; 310, lower mold plate; 320, punch; 330, first support table; 340, second support table; 350, first elastic member; 360, forming cavity; 370, positioning column; 400, upper mold base; 401, hydraulic cylinder; 402, punch; 403, center hole; 410, press; 420, upper mold plate; 430, guide assembly; 431, guide sleeve; 432, guide column; 433, third elastic member; 440, first forming plate; 450, second forming plate; 460, second elastic member; 470, pressing plate; 480, groove; 500, fixed-point lubricating mechanism; 510, oil channel; 520, oil groove; 530, centralized oil supply connector; 540, lubricating block; 541, forming part; 542, lubricating part; 543, cooling part; 544, clamping part; 545, fastening screw; 546, micro-hole network; 547, oil guide pattern; 600, locking member; 610, drive cylinder; 620, locking pin; 630, pin hole. DETAILED DESCRIPTION

[0043] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. Note that the relative arrangement of the components and steps illustrated in these embodiments, numerical expressions, and numerical values are merely examples, and do not limit the scope of the present application unless otherwise specifically stated.

[0044] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the scope of the application its application or uses.

[0045] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as if the techniques, methods, and apparatus were discussed with reference to the specification.

[0046] In all the examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.

[0047] As Figures 1-13 shown, a valve body stamping forming device includes a frame 100, a multi-station turret mold frame 200, a plurality of lower mold bases 300, an upper mold base 400, a fixed-point lubricating mechanism 500, and a locking member 600.

[0048] Please refer to Figure 2 , the multi-station turret mold frame 200 includes a precision indexing turntable 210 rotatably connected to the surface of the frame 100, and the precision indexing turntable 210 is driven by a servo motor 220 to realize intermittent precision positioning through a cam indexer 230.

[0049] Please refer to Figure 1 and Figure 3 , the plurality of lower mold bases 300 are fixed circumferentially and uniformly on the surface of the precision indexing turntable 210, and each lower mold base 300 includes a lower mold plate 310 having a forming cavity 360 in the middle, a male die 320 fixed in the middle of the forming cavity 360, a first support table 330 sleeved on the outer wall of the male die 320, and a second support table 340 sleeved on the outer wall of the first support table 330. The first support table 330 and the second support table 340 are both fixedly connected with the lower mold plate 310 through a first elastic member 350.

[0050] It should be noted that the first elastic member 350 is a nitrogen spring, please refer to Figure 3 The surface of the lower mold plate 310 is fixedly connected with a plurality of positioning columns 370, and the workpiece is placed in the area surrounded by the plurality of positioning columns 370, which facilitates positioning the workpiece during feeding.

[0051] By setting the multi-station turret mold frame 200 driven by the cam indexer 230 driven by the servo motor 220 and the plurality of lower mold bases 300 uniformly distributed in the circumference, the multi-station continuous production of the workpiece under the single press 410 is realized, when one station is stamping, the other stations can simultaneously load or unload, making the production process continuous, greatly reducing the production rhythm and improving the efficiency. At the same time, the intermittent precise positioning provided by the precision indexing turntable 210 ensures the height consistency of each lower mold base 300 when moving under the upper mold base 400, ensuring the quality of each formed workpiece.

[0052] Please refer to Figures 5-9 The upper mold base 400 is driven by the press 410 to move away from or close to the lower mold base 300 to realize compression molding, and the upper mold base 400 includes an upper mold plate 420 fixedly connected to the output end of the press 410, a first forming plate 440 connected to the bottom of the upper mold plate 420 through a guide assembly 430, a second forming plate 450 sleeved on the outer wall of the first forming plate 440, a pressure plate 470 fixed in the inner cavity of the first forming plate 440 through a second elastic element 460, and the bottom of the first forming plate 440 has a groove 480, and the pressure plate 470 is located in the groove 480. The second forming plate 450 is fixed to the bottom of the upper mold plate 420.

[0053] It should be noted that the second elastic element 460 is a nitrogen spring.

[0054] By setting the first support table 330 and the second support table 340, the first forming plate 440 and the second forming plate 450, and combining the switchable locking element 600, precise control of material flow is realized; when stamping the first boss, the locking element 600 is locked, the mold base is deep-drawn as a whole to ensure the shape of the first boss; when stamping the second boss, the locking element 600 is released, and the internal module (the first support table 330 and the first forming plate 440) can move relatively under the action of the first elastic element 350 and the second elastic element 460, forming flexible molding, effectively preventing workpiece cracking or wrinkling, especially suitable for complex workpieces such as valve covers with multiple bosses, and through one-time molding of double-boss structure, the cumulative error caused by repeated positioning in multi-process production is fundamentally eliminated.

[0055] Specifically, please refer to Figure 6 and Figure 7 The guide assembly 430 includes a guide sleeve 431 fixed to the upper mold plate 420 and a guide column 432 fixed to the first forming plate 440, the guide column 432 and the guide sleeve 431 are in sliding fit, the guide column 432 is externally sleeved with a third elastic element 433, and the two ends of the third elastic element 433 are respectively abutted with the upper mold plate 420 and the first forming plate 440.

[0056] It should be noted that the third elastic element 433 is a spring.

[0057] The sliding fit of the guide column 432 and the guide sleeve 431 ensures the linearity and precision of the movement of the first forming plate 440 relative to the upper die plate 420. The third elastic member 433 sleeved outside the guide column 432 not only provides the return force of the first forming plate 440, but also plays a buffering role at the moment of stamping, absorbs part of the impact energy, protects the working parts of the die, and improves the stability of stamping.

[0058] In addition, please refer to Figure 9 The bottom of the upper die plate 420 is fixedly connected with a hydraulic oil cylinder 401, the output end of the hydraulic oil cylinder 401 is fixedly connected with a punch 402, and the center hole 403 is formed in the middle of the pressing plate 470 and the male die 320. Please refer to Figure 2 A plurality of waste passages 240 are formed in the precision indexing turntable 210, and the waste passage 240 is coaxial with the corresponding center hole 403.

[0059] By setting the hydraulic oil cylinder 401 and the punch 402 on the upper die plate 420, and setting the center hole 403 in the pressing plate 470 and the male die 320, and setting the waste passage 240 on the precision indexing turntable 210, the device can punch the center of the workpiece while forming the double bosses, completing two processes in one step, further improving the production efficiency, and realizing the automatic removal of the blanking waste, keeping the die clean, and finally the valve cover is formed as shown in Figure 13 .

[0060] Please refer to Figure 2 The rack 100 is provided with a waste collecting box 110, which is located directly below the upper die seat 400. The waste collecting box 110 can collect the waste falling from the waste passage 240, avoid the accumulation of waste on the rack 100 affecting the equipment operation or working environment, keep the production site clean, and facilitate the centralized treatment of waste.

[0061] Please refer to Figure 9 The fixed-point lubricating mechanism 500 is integrated in the first forming plate 440 and the second forming plate 450. The fixed-point lubricating mechanism 500 integrated in the forming plate can directly and automatically lubricate the precision sliding fit surface, reduce wear, ensure smooth long-term operation of the first forming plate 440 and the second forming plate 450, and maintain the forming precision.

[0062] Specifically, please refer to Figure 9 , Figure 10 and Figure 11 The fixed-point lubricating mechanism 500 includes an oil channel 510 formed in the first forming plate 440 and the second forming plate 450, and an oil groove 520 arranged on the opposite sliding fit surface of the first forming plate 440 and the second forming plate 450. The inlet of the oil channel 510 is connected with a centralized oil supply connector 530.

[0063] It should be noted that the centralized oil supply joint 530 penetrates the upper die plate 420, and the centralized oil supply joint 530 on the first forming plate 440 is in sliding connection with the upper die plate 420, and the centralized oil supply joint 530 on the second forming plate 450 is in fixed connection with the upper die plate 420.

[0064] Through the built-in oil channel 510 and the oil groove 520 on the matching surface, the lubricating oil can be directly delivered to the sliding interface that needs lubrication most, and the centralized oil supply joint 530 facilitates the external automatic lubrication system, realizes the automatic oil supply of timing and quantity, avoids the untimely and inconvenience of manual lubrication, ensures the lubrication effect, and reduces the maintenance workload.

[0065] Please refer to Figure 9 The outlet of the oil groove 520 is detachably connected with a lubricating block 540 made of wear-resistant material, and the lubricating block 540 is located at the bottom corner of the first forming plate 440 and the second forming plate 450, respectively. The lubricating block 540 made of wear-resistant material is arranged at the easily-worn position of the bottom corner, directly facing the workpiece and friction, improving the durability of the mold. The detachable design of the lubricating block 540 makes it possible to replace it individually after wear, without the need to replace the entire expensive first forming plate 440 or second forming plate 450, greatly reducing the maintenance cost and time.

[0066] Please refer to Figure 11 The lubricating block 540 includes a forming part 541, a lubricating part 542, a cooling part 543, and a clamping part 544. The forming part 541 is located between the lubricating part 542 and the cooling part 543. The clamping part 544 is fixed in the oil groove 520 by a fastening screw 545. The lubricating part 542, the cooling part 543, and the clamping part 544 are internally provided with a network of interconnected micro-holes 546, which are in communication with the oil channel 510. The working surfaces of the lubricating part 542 and the cooling part 543 are provided with net-like or spiral oil guiding lines 547.

[0067] The coordination of the fixed-point lubrication mechanism 500 in the stamping process is as follows:

[0068] First step: The lubricating part 542 establishes a solid initial lubricating film

[0069] Action timing and action: At the initial stage of stamping, the lubricating part 542 first contacts the surface of the workpiece, and the oil guiding lines 547 on its working surface rapidly spread the lubricating oil. Before the forming part 541 reaches, a uniform and sufficient lubricating film is formed on the surface of the blank.

[0070] Synergistic value: This layer of pre-lubricating film is the first and most important line of defense for the workpiece surface, ensuring that when the smooth forming part 541 begins to extrude the material, it is working in a low-friction coefficient environment, avoiding direct dry friction between the material and the mold from the source, fundamentally preventing workpiece scratches.

[0071] Second step: The forming part 541 performs precision forming under the protection of the oil film

[0072] Action timing and action: The smooth arc forming part 541 then extrudes the pre-lubricated material, as its surface is smooth and will not leave any lines on the workpiece surface, ensuring the smoothness and dimensional accuracy of the valve cover boss outer wall.

[0073] Lubrication guarantee:

[0074] Main guarantee: The initial lubricating film established by the lubricating part 542 is brought into the working area of the forming part 541 during material flow, continuing to play a friction-reducing role.

[0075] Auxiliary guarantee: The cooling part 543 continuously outputs lubricating oil during the forming process, which flows along the forming area, mainly used to reinforce and maintain the lubrication state of the contact points, preventing the oil film from breaking under extreme pressure.

[0076] Synergistic value: This design achieves decoupling of the lubrication function and the forming function, with a smooth forming surface ensuring product appearance quality, and a pre-positioned and permeated lubrication method ensuring smooth forming process, both of which solve the two difficult problems of surface quality and forming difficulty.

[0077] Third step: Cooling and post-lubrication by cooling part 543 to consolidate forming quality

[0078] Action timing and action: After the forming is basically completed, the cooling part 543 contacts the formed workpiece surface, and its oil guide pattern 547 applies lubricating oil to the workpiece surface and carries away a large amount of heat generated by plastic deformation and friction.

[0079] Synergistic value:

[0080] Cooling and setting: Control the workpiece temperature to reduce deformation and springback abnormalities caused by overheating, and stabilize the product size.

[0081] Auxiliary demolding: Lubricate the workpiece for demolding to prevent the workpiece from sticking or jamming with the mold.

[0082] Process closed loop: It is in correspondence with the lubricating part 542, one responsible for inlet lubrication and the other responsible for outlet cooling and lubrication, forming a complete process protection closed loop.

[0083] Therefore, the lubricating block 540 is divided into a forming part 541, a lubricating part 542, a cooling part 543, and a clamping part 544, realizing multifunctional integration; the internal micropore network 546 ensures that the lubricating oil can uniformly penetrate the entire working surface, and the oil guide lines 547 on the working surface help the lubricating oil to spread on the contact surface to form a uniform oil film. This structure not only reduces friction, but also, during the stamping forming process of the workpiece, the lubricating part 542 is located at the front end of the stamping stroke, first outputs lubricating oil to the surface of the workpiece to be processed, then the forming part 541 extrudes the workpiece to form it, and finally, the cooling part 543 is located at the rear end of the stamping stroke, outputs lubricating oil to the surface of the just-formed workpiece, can take away part of the friction heat and workpiece heat, plays a certain cooling role, and further improves the forming conditions.

[0084] Please refer to Figure 11 The working surface of the forming part 541 is a curved surface, and the design of the curved surface avoids sharp corner stress concentration, can more smoothly guide the material flow when contacting the sheet material, reduces the risk of scratching the surface of the workpiece, and is beneficial to improve the surface finish of the formed workpiece.

[0085] Please refer to Figure 3 and Figure 4 The locking member 600 is arranged between the first support table 330 and the second support table 340, and between the first forming plate 440 and the second forming plate 450.

[0086] Specifically, please refer to Figure 4 The locking member 600 includes drive cylinders 610 fixed on the second support table 340 and the second forming plate 450 respectively, the output ends of the drive cylinders 610 are fixedly connected with locking pins 620, and the outer walls of the first support table 330 and the first forming plate 440 are both provided with pin holes 630.

[0087] The locking and releasing are realized by the way that the drive cylinders 610 (such as air cylinders or oil cylinders) drive the locking pins 620 to insert or withdraw from the pin holes 630, which is rapid and reliable in action, simple in power source, easy to integrate with the whole machine control system, realizes automatic and precise control, and ensures switching the locking state at the correct process time.

[0088] Among them, when stamping and forming the first boss of the workpiece, the locking member 600 is in the locking state, so as to keep the first support table 330 and the second support table 340, and the first forming plate 440 and the second forming plate 450 relatively fixed; while stamping and forming the second boss of the workpiece, the locking member 600 is in the releasing state, so as to allow the first support table 330 and the second support table 340, and the first forming plate 440 and the second forming plate 450 to relatively move.

[0089] The release state of the locking piece 600 changes the mold from a rigid body to an intelligent system with multiple action sequences. Within one stroke of the press 410, the process sequence of multi-step stamping is accurately simulated. The specific process is as follows:

[0090] I. Collaborative work

[0091] The role of the multi-station turret mold frame 200: provide a parallel operation platform to achieve high efficiency beat. The precision indexing turntable 210 is provided with a plurality of lower die seats 300, and its core function is to realize the circulation of the three stations of feeding, stamping and unloading.

[0092] Work flow: when a workpiece is stamped in the stamping station, the finished product can be removed in the unloading station, and the new blank can be placed in the feeding station. After stamping is completed, the turntable indexes once, and the work of the three stations is switched to the next step at the same time, which greatly improves the production efficiency and hides the auxiliary time in the processing time.

[0093] The precision indexing turntable 210 ensures that each blank has high repeat positioning accuracy when it reaches the stamping station, which is the basis for all subsequent precision forming.

[0094] The role of the locking piece 600: realize the sequence forming of rigidity first and flexibility later in a single stroke.

[0095] II. Dynamic switching of the locking piece 600 and four-stage forming process in a single stroke in the stamping station

[0096] Before stamping: the blank is sent to the lower die seat 300, and the locking piece 600 is in the locked state (the driving cylinder 610 pushes the locking pin 620 to insert into the pin hole 630).

[0097] Stage one: rigid forming of the first boss in the locked state

[0098] Action and structure cooperation: the press 410 drives the upper die seat 400 to move downward, and since the locking piece 600 is locked, the second forming plate 450 and the first forming plate 440 are rigidly connected as a whole; the second support table 340 of the lower die and the first support table 330 are also rigidly connected as a whole.

[0099] At this time, the upper and lower dies contact the blank like two whole rigid blocks. The pressure plate 470 in the first forming plate 440 contacts the middle part of the workpiece, and the pressure plate 470 is in close contact with the top of the punch 320 under the controllable pressure provided by the second elastic member 460, forcing the material to be rapidly drawn into the first boss of the valve cover, while the surrounding material is pressed and flows.

[0100] The role of the locking piece 600:

[0101] Provide strong rigidity: Ensure the mold has enough strength and stability when forming the first boss, the main shape, to avoid elastic deformation affecting the size accuracy.

[0102] High-efficiency force transmission: The capacity of the press 410 is fully and directly used for the deep drawing deformation of the material, ensuring that the first boss shape is full and accurate.

[0103] Stage two: Switch to release state, prepare for secondary forming

[0104] Action and structure cooperation:

[0105] After the first boss is formed, the upper die plate 420 continues to descend by a predetermined distance, or through a control system trigger signal, the drive cylinder 610 of the locking piece 600 acts, the locking pin 620 is withdrawn, and the locking piece 600 is converted to the release state. At this point, the first forming plate 440 and the second forming plate 450 are disconnected, and the first support table 330 and the second support table 340 are also disconnected.

[0106] Stage three: Flexible forming of the second boss in the release state

[0107] Action and structure cooperation:

[0108] The upper die holder 400 continues to descend, and the second forming plate 450, which was originally part of the whole, can now move relative to the first forming plate 440 (compressing the third elastic element 433 on the guide assembly 430).

[0109] The role of the locking piece 600:

[0110] Flexible forming is achieved: The release state allows the elastic elements inside the mold to play a role, converting the huge impact force into controllable and gentle pressure, which avoids the cracking or deformation that may occur when directly rigid stamping on the already formed thin wall.

[0111] Optimize material flow: Flexible pressure allows material to be redistributed within a small range, ensuring the quality of the second boss forming and releasing the stress that the first boss may bear during secondary forming.

[0112] Stage four: Punching in the middle of the valve cover

[0113] Action and structure cooperation: At the end of the travel of the upper die plate 420, the workpiece has been completely constrained, and the hydraulic oil cylinder 401 on the upper die plate 420 drives the punch 402 to pass through the center hole 403 of the pressure plate 470 and the punch 320, realizing the punching in the middle of the valve cover, and finally the waste falls from the waste channel 240.

[0114] Return: the upper die holder 400 returns, and each part of the mold resets under the action of the elastic member. The locking member 600 can reset to the locking state during or after the return, so as to prepare for the next working cycle.

[0115] It should be noted that, please refer to Figure 1 , the rack 100 is provided with a feeding mechanism 120 and a discharging mechanism 130, please refer to Figure 12 , the feeding mechanism 120 and the discharging mechanism 130 both include a mounting base 101 fixed on the rack 100, a linear drive module 102 fixedly installed on the mounting base 101, a one-way cylinder 103 connected to the output end of the linear drive module 102, a double-way cylinder 104 fixed on the output end of the one-way cylinder 103, and a mechanical gripper 105 fixed on the output end of the double-way cylinder 104.

[0116] It should be noted that the linear drive module 102 is a cylinder, a hydraulic cylinder or an electric screw slide.

[0117] Through the cooperation of the linear drive module 102, the one-way cylinder 103, the double-way cylinder 104 and the mechanical gripper 105, automatic grabbing, moving and placing of the workpiece are realized. The structure can realize multi-degree-of-freedom action, accurately send the blank into the mold or take out the finished product, thereby cooperating with the multi-station turret mold frame 200 to form a complete automatic production unit, significantly reducing labor cost and ensuring operation safety.

[0118] Although some specific embodiments of the present application have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A valve body stamping forming device, characterized in that, include: Rack (100); The multi-station turret mold frame (200) includes a precision indexing turntable (210) rotatably connected to the surface of the frame (100), wherein the precision indexing turntable (210) is driven by a cam indexer (230) by a servo motor (220) to achieve intermittent precision positioning; Multiple lower mold bases (300) are circumferentially and uniformly fixed on the surface of the precision indexing turntable (210). Each lower mold base (300) includes a lower template (310) with a forming cavity (360) in the middle, a punch (320) fixed in the middle of the forming cavity (360), a first support platform (330) sleeved on the outer wall of the punch (320), and a second support platform (340) sleeved on the outer wall of the first support platform (330). The first support platform (330) and the second support platform (340) are both fixedly connected to the lower template (310) by a first elastic element (350). The upper mold base (400) is driven by the press (410) to move away from or closer to the lower mold base (300) to achieve pressing and forming. It includes an upper template (420) fixedly connected to the output end of the press (410), a first forming plate (440) connected to the bottom of the upper template (420) through a guide component (430), a second forming plate (450) sleeved on the outer wall of the first forming plate (440), and a pressure plate (470) fixed in the inner cavity of the first forming plate (440) through a second elastic element (460). The bottom of the first forming plate (440) has a groove (480), and the pressure plate (470) is located in the groove (480). The second forming plate (450) is fixed to the bottom of the upper template (420). A fixed-point lubrication mechanism (500) is integrated within the first forming plate (440) and the second forming plate (450); A locking element (600) is disposed between the first support platform (330) and the second support platform (340), and between the first molding plate (440) and the second molding plate (450); When the first boss of the stamped workpiece is formed, the locking member (600) is in a locked state to keep the first support platform (330) and the second support platform (340) and the first forming plate (440) and the second forming plate (450) relatively fixed; while when the second boss of the stamped workpiece is formed, the locking member (600) is in a released state to allow relative movement between the first support platform (330) and the second support platform (340) and between the first forming plate (440) and the second forming plate (450).

2. The valve body stamping forming device according to claim 1, characterized in that, The locking component (600) includes a drive cylinder (610) fixed on the second support platform (340) and the second molding plate (450) respectively. The output end of the drive cylinder (610) is fixedly connected to a locking pin (620). The outer walls of the first support platform (330) and the first molding plate (440) are both provided with pin holes (630).

3. The valve body stamping forming device according to claim 2, characterized in that, The guide assembly (430) includes a guide sleeve (431) fixed to the upper template (420) and a guide post (432) fixed to the first forming plate (440). The guide post (432) is slidably engaged with the guide sleeve (431). A third elastic element (433) is sleeved on the outside of the guide post (432). The two ends of the third elastic element (433) abut against the upper template (420) and the first forming plate (440) respectively.

4. The valve body stamping forming device according to claim 3, characterized in that, The fixed-point lubrication mechanism (500) includes an oil passage (510) opened inside the first forming plate (440) and the second forming plate (450), and an oil groove (520) provided on the relative sliding mating surface of the first forming plate (440) and the second forming plate (450). The inlet of the oil passage (510) is connected to a centralized oil supply connector (530).

5. The valve body stamping forming device according to claim 4, characterized in that, The outlet of the oil tank (520) is detachably connected to a lubricating block (540) made of wear-resistant material, and the lubricating block (540) is located at the bottom corner of the first forming plate (440) and the second forming plate (450).

6. The valve body stamping forming apparatus according to claim 5, characterized in that, The lubricating block (540) includes a forming part (541), a lubrication part (542), a cooling part (543), and a snap-fit ​​part (544). The forming part (541) is located between the lubrication part (542) and the cooling part (543). The snap-fit ​​part (544) is fixed in the oil groove (520) by fastening screws (545). The interior of the lubrication part (542), the cooling part (543), and the snap-fit ​​part (544) are all distributed with interconnected microporous networks (546). The microporous networks (546) are connected to the oil passages (510). The working surfaces of the lubrication part (542) and the cooling part (543) are all covered with mesh-like or spiral-shaped oil guiding patterns (547).

7. The valve body stamping forming apparatus according to claim 6, characterized in that, The working surface of the forming part (541) is an arc surface.

8. A valve body stamping forming apparatus according to any one of claims 1 to 7, characterized in that, A hydraulic cylinder (401) is fixedly connected to the bottom of the upper template (420), and a punch (402) is fixedly connected to the output end of the hydraulic cylinder (401). A center hole (403) is opened in the middle of the pressure plate (470) and the punch (320). Multiple scrap channels (240) are opened on the precision indexing turntable (210), and the scrap channels (240) are coaxial with the corresponding center holes (403).

9. A valve body stamping forming apparatus according to claim 8, characterized in that, A waste collection box (110) is provided on the frame (100), and the waste collection box (110) is located directly below the upper mold base (400).

10. A valve body stamping forming apparatus according to claim 9, characterized in that, The frame (100) is provided with a feeding mechanism (120) and a unloading mechanism (130). The feeding mechanism (120) and the unloading mechanism (130) each include a mounting base (101) fixed on the frame (100), a linear drive module (102) fixedly mounted on the mounting base (101), a single-stroke cylinder (103) connected to the output end of the linear drive module (102), a double-stroke cylinder (104) fixed to the output end of the single-stroke cylinder (103), and a mechanical gripper (105) fixed to the output end of the double-stroke cylinder (104).

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