A multi-station forming mechanism for a ball stud

Abstract

The present invention belongs to the technical field of ball pin manufacturing, and in particular, relates to a multi-station forming mechanism for a ball pin, including a plurality of forming stations arranged side by side, one station being responsible for a step of forming the ball pin, such as forming the bottom rod diameter of the ball pin, the head of the preformed ball pin, the flange of the formed ball pin, and the ball head of the formed ball pin by a positive extrusion process. Each forming station includes: a support assembly, the support assembly includes a base, a lower die seat installed on the base; an extrusion assembly, the extrusion assembly includes an upper support shell arranged toward the base, an extrusion placement hole is formed in the upper support shell, an upper die assembly and an extrusion reset assembly cooperating with the upper die assembly are arranged in the extrusion placement hole; and an extrusion drive mechanism is arranged at one end of the upper support shell away from the base; a lower ejector assembly, a lower ejector assembly is arranged at the bottom of the support assembly, and a lower ejector rod extending into the lower die seat of the base is arranged on the lower ejector assembly.

Description

Technical Field

[0001] The invention belongs to the technical field of ball pin manufacturing, and in particular relates to a multi-station forming mechanism for a ball stud pin. Background Art

[0002] The ball stud is an important connecting part on cars and tractors. It is also a key component to ensure the stability of car handling, the smoothness, comfort, safety of driving, and the correct and accurate driving of the car. Therefore, there are high requirements for its physical and mechanical properties. Since the ball stud is a thin structure in the middle and large at both ends, it cannot be formed by ordinary molds. In the past, it was mainly processed by cutting technology. The strength and hardness of the material could not be guaranteed. In actual use, parts are often damaged and need to be replaced continuously.

[0003] One of the existing production processes is to complete the CNC machining of the bar material (in this production process, the material utilization rate is only 36%, and the production speed is 1pcs / min, the material utilization rate is low, and the production cost of the ball pin is too high. There is also a production method that uses cold heading process plus machining, with a material utilization rate of 70%, and a machining production speed of 2pcs / min. The material utilization rate and production efficiency are still low. Another process is to form by cold extrusion or cold heading. This process has a high material utilization rate. At that time, since the product needs to be ejected after forming, it is necessary to set a push rod at the bottom of the lower die of the forming, and then the push rod is ejected by a hydraulic cylinder. During the product forming process, the push rod needs to be pressed down by pressure. During this process, the push rod is always in an extrusion state between the blank, and the extrusion is more obvious at the moment when the upper die contacts the workpiece. Under the instantaneous pressure, it is very likely to cause damage to the workpiece; because the ejector rod is ejected by hydraulic ejection in an instantaneous output state, when there is a certain degree of pressing or sticking between the extruded product and the lower die, the parts may be damaged under this instantaneous impact, thereby affecting the product yield. Summary of the invention

[0004] The purpose of the present invention is to provide a multi-station forming mechanism for a ball stud which is simple in structure and easy to produce in order to solve the above-mentioned technical problems.

[0005] In view of this, the present invention provides a multi-station forming mechanism for a ball stud, comprising a plurality of forming stations arranged side by side, wherein one station is responsible for a step of forming the ball stud, such as forming the bottom rod diameter of the ball stud, the head of the preformed ball stud, the flange of the formed ball stud and the ball head of the formed ball stud by a forward extrusion process.

[0006] Each molding station includes:

[0007] A support assembly, the support assembly comprising a base and a lower die seat mounted on the base;

[0008] The extrusion assembly includes an upper support shell arranged toward the base, an extrusion placement hole is formed in the upper support shell, an upper mold assembly and an extrusion reset assembly matched with the upper mold assembly are arranged in the extrusion placement hole; and an extrusion drive mechanism is arranged at one end of the upper support shell away from the base;

[0009] A lower ejector assembly is provided at the bottom of the support assembly, and a lower ejector rod is provided on the lower ejector assembly and extends into the lower die seat of the base;

[0010] The upper die assembly includes: an outer die block, the extrusion placement hole includes an opening and closing hole extending inward from the end surface of the upper support shell, the opening and closing hole is conical, a plurality of circumferentially distributed outer die blocks are arranged on the opening and closing hole, the outer die blocks can be telescopically slidable on the opening and closing hole, and an upper die cavity is formed in the middle of the plurality of circumferentially distributed outer die blocks; a limiting slide groove is arranged at the side end of each outer die block, and a limiting rod inserted into the limiting slide groove is arranged on the outer side of the upper support shell;

[0011] The squeeze reset assembly includes:

[0012] The inner pressing member, the extrusion placement hole also includes an inner receiving hole arranged on the inner side of the opening and closing hole, and an inner pressing member abutting against the outer module is arranged on the outer side of the inner receiving hole;

[0013] An inner return spring is arranged at the bottom of the inner receiving hole, and the other end of the inner return spring abuts against the inner pressing member.

[0014] In the present technical scheme, the supporting assembly mainly supports and places the lower die base and the lower ejection assembly; the extrusion assembly drives the upper die to apply pressure in the direction of the lower die base, thereby forming the shape of the parts at different stages; the second upper die assembly is composed of several upper die modules, and the upper die modules are telescopically slidably coordinated with the opening and closing holes, so that several outer modules can move up and close at the same time during the mold closing process, thereby forming the mold cavity of the upper die; the set internal clamping assembly can provide good support for the outer module, and the internal reset spring can timely eject the upper module when the extrusion drive mechanism is reset, thereby facilitating the demolding of the parts; and the set limit slide groove and limit rod can prevent the outer module from detaching from the upper support shell, thereby ensuring the stability of the equipment operation.

[0015] In the above technical solution, further, the lower ejector assembly includes:

[0016] An upper ejector support platform, a lower ejector rod is arranged at the upper end of the upper ejector support platform, and the upper ejector support platform is in a regular hexagon;

[0017] A lower fixed support platform, the lower fixed support platform and the upper ejection support platform are symmetrically arranged, and the lower fixed support platform is in a regular hexagon;

[0018] A buffer telescopic rod, wherein a plurality of telescopic rod assemblies distributed in a cylindrical manner are arranged between the upper ejection support platform and the lower fixed support platform, and each telescopic rod assembly is composed of two buffer telescopic rods symmetrically arranged and distributed in a V shape;

[0019] Anti-deflection connecting piece, the two ends of the buffer telescopic rod are respectively provided with anti-deflection connecting pieces, and the buffer telescopic rod is connected to the upper ejection support platform and the lower fixed support platform through the anti-deflection connecting pieces at both ends;

[0020] The six side walls of the upper ejection support platform and the lower fixed support platform are formed with protruding and mutually symmetrical connecting blocks; the lower ends of the two buffer telescopic rods in the telescopic rod assembly are fixed to the same connecting block on the lower fixed support platform through anti-deflection connecting pieces, and the other ends of the two buffer telescopic rods extend to both sides and are respectively fixed to the adjacent connecting blocks on both sides of the symmetrical connecting block of the upper ejection support platform through anti-deflection connecting pieces.

[0021] In the present technical scheme, an inner mounting groove for accommodating the lower ejection assembly is provided at the bottom of the base, the cross-section of the inner mounting groove is a regular hexagon, and a sliding groove cooperating with the connecting block is formed on each side wall of the hexagon, the depth of the sliding groove is greater than the width of the connecting block, and the cooperation of the sliding groove and the connecting block can ensure the smooth operation of the upper ejection support platform and prevent the upper ejection support platform from rotating; and the upper ejection support platform is used to fix the upper ejection rod, and drives the upper ejection rod to move up and down by playing a transmission role; the first fixed platform plays the role of bottom support and fixing, and the buffer telescopic rod can realize the upper ejection support platform to move up and down relative to the lower fixed support seat, and the upper ejection support platform can be prevented from deflecting when it is displaced by multiple buffer telescopic rods and anti-bias connectors; and the telescopic rod assembly is composed of two buffer telescopic rods that are symmetrically arranged and distributed in a V shape, so as to ensure the stability of the telescopic extension and the overall structural strength of the lower ejection assembly.

[0022] In the above technical solution, further, the anti-deflection connecting member includes:

[0023] A fixed hinge seat, which is used for fixed connection with the connecting block;

[0024] A hinge receiving block, one side of which is rotatably connected to a fixed hinge seat via a rotating shaft;

[0025] An offset hinge seat, the offset hinge seat is connected to the other side of the hinge receiving block, and the hinge receiving block is rotatably connected to the offset hinge seat via a rotating shaft;

[0026] The offset flange shaft has a placement groove formed inwardly on a side of the offset hinge seat away from the fixed hinge seat, an offset bearing is arranged in the placement groove, and an offset flange shaft is arranged on the offset bearing, and the flange shaft is provided with an anti-dropping bolt that passes through the offset hinge seat and limits it; the offset flange shaft is connected to the buffer telescopic rod through the bolt;

[0027] The two ends of the buffer telescopic rod are respectively fixedly connected to the offset flange shaft by bolts and nuts; a connecting shaft is fixedly arranged on the side of the fixed hinge seat away from the offset hinge seat, a connecting groove matching the connecting shaft is formed on the connecting block, and a limiting groove is arranged on the side wall of the connecting shaft, a limiting bolt is arranged on the connecting block, and the limiting bolt is inserted into the connecting groove and abuts against the limiting groove.

[0028] In the present technical solution, the fixed seat hinge is used to connect with the upper ejection support platform or the lower fixed support platform, and the offset hinge seat cooperates with the offset flange shaft to connect with the telescopic rod, so that even if the buffer telescopic rod rotates, it will not affect the overall operation effect of the buffer telescopic rod; and both ends of the buffer telescopic rod are connected by anti-bias connectors to timely adjust the angle of the buffer telescopic rod during the extension and retraction process of the buffer telescopic rod, thereby ensuring the stability of the displacement of the upper ejection support platform.

[0029] In the above technical solution, further, the buffer telescopic rod includes:

[0030] An upper support rod, one end of which is connected to an anti-deflection connecting piece on the upper ejection support platform;

[0031] An intermediate support sleeve is provided on the lower side of the upper support rod, and the upper support rod and the intermediate support sleeve are slidably matched;

[0032] An intermediate receiving seat is provided at the bottom of the intermediate supporting sleeve;

[0033] A lower connecting sleeve, one end of which is fixedly connected to the middle receiving seat, and the other end of which is connected to the anti-deflection connecting piece on the lower fixed support platform;

[0034] An external buffer spring is provided between the upper support rod and the middle sleeve;

[0035] An inner buffer component is arranged on the middle receiving seat.

[0036] In the present technical solution, the upper support rod is used to provide good connection and support for the upper ejection support platform, while the intermediate support sleeve provides telescopic space for the upper support rod, and the intermediate receiving seat is used to limit the upper support seat and place the internal buffer assembly. The external buffer spring can provide good elastic buffering and support effects when the upper support rod is telescoped. The setting of the internal buffer assembly can ensure good shock-absorbing and buffering effects during the telescope process of the upper support rod.

[0037] In the above technical solution, further, the upper support rod includes:

[0038] An upper connecting plate, which is annular and has a plurality of connecting holes evenly distributed on the outer edge thereof, through which the upper supporting rod is fixedly connected to the offset flange shaft on the anti-deviation connecting piece, and a connecting rod portion is formed downwardly on the lower end surface of the upper connecting plate, and a supporting block is formed at the bottom of the connecting rod portion;

[0039] An annular sleeve, the annular sleeve is located at the lower side of the upper connecting plate, and a fixing hole is formed inwardly at the upper end of the annular sleeve, and an elastic support component that abuts against the support block is arranged in the fixing hole, and a limiting end cover of the limiting support block is arranged at the upper end of the annular sleeve;

[0040] A lower piston portion is provided at the lower end of the annular sleeve;

[0041] An inner floating assembly is connected between the annular sleeve and the lower piston portion through the inner floating assembly;

[0042] A guide ring, wherein a guide groove is arranged on the middle part of the outer wall of the lower piston part, and a guide ring made of a metal material is arranged on the guide groove;

[0043] The sealing ring assembly is provided with sealing grooves on the outer wall of the lower piston part and on both sides of the guide groove. The sealing ring assembly is provided in the sealing groove. The sealing ring assembly includes a first sealing ring and a second sealing ring.

[0044] In the present technical solution, the upper connecting plate can be conveniently fixedly connected to the offset flange shaft; the cooperation of the annular sleeve and the elastic support assembly can ensure a good floating connection to the upper connecting plate; the setting of the lower piston part can increase the contact area between the inside of the upper support rod and the lower connecting sleeve, thereby increasing the buffering and shock absorbing effects; the unloaded part described in the internal floating assembly plays a good floating buffering and connection role between the annular sleeve and the lower piston part; the guide ring can facilitate the sliding cooperation between the lower piston part and the intermediate support sleeve, and the setting of the sealing assembly can improve the fit and sealing effect between the lower piston part and the intermediate support sleeve.

[0045] In the above technical solution, further, the cross-section of the upper connecting plate is larger than the cross-section of the intermediate supporting sleeve, and a limiting edge is integrally formed on the outer wall of the intermediate supporting sleeve on one side of the upper connecting plate, and the two ends of the outer buffer spring are respectively against the limiting edge and the upper connecting plate; the inner buffer assembly includes:

[0046] The inner spring seat is provided with a through stepped hole on the middle receiving seat, the stepped hole decreases in diameter from the bottom of the middle receiving seat upward, the inner spring seat is threadedly connected to the bottom of the stepped hole, a through hole is formed in the middle of the inner spring seat, and a plurality of guide holes evenly distributed along the circumference are formed on the outside of the through hole;

[0047] A guide valve plate is provided at the upper end of the stepped hole to block the upper part of the stepped hole, and a buffer flow hole is formed in the middle of the guide valve plate;

[0048] A guide spring is arranged between the guide valve plate and the inner spring seat, and a limiting protrusion is formed on the guide valve plate to clamp one end of the guide spring, and a limiting protrusion ring is formed in the middle of the inner spring seat to clamp the other end of the guide spring;

[0049] A lower connecting flange is formed at the bottom of the lower connecting sleeve, and the lower connecting sleeve is fixedly connected to the offset flange shaft on the anti-deviation connecting piece through the lower connecting flange. A buffer oil chamber is formed in the lower connecting sleeve, and a flow hole connected to the buffer oil chamber is arranged on the side wall of the lower connecting sleeve.

[0050] In the present technical scheme, buffer oil is injected into the buffer oil chamber; the setting of the limit edge can better facilitate the installation and limiting of the outer buffer spring; and the setting of the inner spring seat plays a good supporting role for the guide valve plate with the cooperation of the guide spring, and the setting of the guide hole and the through hole on the inner spring seat can better facilitate the flow of the buffer fluid, and the set guide valve plate can facilitate the discharge of the oil in the buffer oil chamber, and ensure that the oil can be slowly introduced into the buffer oil chamber, thereby preventing the telescopic rod from being ejected instantly, thereby reducing the yield rate; at the same time, during the downward pressing process of the upper support rod, the lower piston part and the buffer oil are squeezed to play a good buffering and shock absorbing role, thereby reducing the impact force on the parts at the moment of squeezing.

[0051] In the above technical solution, further, the buffer oil chamber in the intermediate support sleeve is connected to the stepped hole, the piston portion of the lower piston is gap-matched with the inner wall of the buffer oil chamber, and the guide ring and the sealing ring assembly are against the inner wall of the buffer oil chamber;

[0052] The internal floating components include:

[0053] An intermediate receiving shaft, the two ends of which are respectively connected to the lower piston part and the annular sleeve, and are respectively threadedly connected to the lower piston part and the annular sleeve;

[0054] A floating outer cylinder is coaxially arranged outside the intermediate receiving shaft, the cross section of the floating outer cylinder is annular, and is slidably matched with the inner wall of the buffer oil chamber, and a supporting edge is formed on both sides of the floating outer cylinder toward the middle;

[0055] A side floating ring assembly is provided with a plurality of side floating ring assemblies which are equally spaced in the floating outer cylinder;

[0056] An intermediate floating ring is provided between two adjacent side floating ring assemblies, and two sides of the intermediate floating ring are respectively abutted against the side floating ring assemblies on both sides;

[0057] An outer support plate is provided on both sides of the equidistantly distributed side floating ring assembly and on the inner side of the support edge. The intermediate receiving shaft passes through the middle of the outer support plate and is fixed by a clamping nut.

[0058] An end floating ring is provided on the inner side of each outer support plate and is abutted against the floating ring assembly.

[0059] In the present technical solution, the setting of the intermediate supporting shaft can facilitate the connection between the lower piston part and the annular sleeve; the buoy outer sleeve is used to accommodate the side floating ring assembly and the intermediate floating ring, and the setting of the outer support plate and the end floating ring can limit the placement of the side floating ring assembly and the intermediate floating ring; and the outer support plate can also play a connecting role with the intermediate supporting shaft, and the intermediate supporting shaft will evenly distribute the force to the side floating ring assembly and the intermediate floating ring through the outer support plate.

[0060] In the above technical solution, further, the cross section of the middle floating ring is two isosceles trapezoids that are symmetrical to each other, and the slope angle of the isosceles trapezoid is 50-70°;

[0061] The side floating ring assembly includes:

[0062] An outer floating ring, the outer wall of which is slidably matched with the floating outer cylinder, the inner wall of which is formed with an outer floating slope having a high middle portion and low sides, and the outer floating slope is butted against the outer wall of the middle floating ring;

[0063] An inner floating ring, the outer wall of which is formed with an inner floating slope symmetrical to the outer floating slope, and the inner floating slope abuts against the inner side wall of the middle floating ring;

[0064] The adjacent side floating ring assemblies form an outer floating gap under the support of the middle floating ring, and the adjacent middle floating rings form a middle floating gap under the support of the side floating ring assemblies;

[0065] The end floating ring is fixedly connected to the outer supporting plate, presenting an isosceles trapezoid, and the end portion extends between the outer floating ring and the inner floating ring in the side floating ring assembly, and abuts against the outer floating slope and the inner floating slope.

[0066] In the present technical solution, by sequentially arranging the side floating ring assembly and the middle floating ring, and with the cooperation of the outer floating slope, the inner floating slope and the middle floating ring, it can achieve a good effect of resisting bidirectional tension and extrusion; at the same time, it can achieve an effect of resisting bending and swinging, thereby ensuring good stability and structural strength of the upper support rod, thereby better ensuring the overall performance of the lower ejection assembly.

[0067] In the above technical solution, further, the elastic support assembly includes:

[0068] An intermediate floating cylinder, wherein an upper floating hole is formed at the middle of the upper end surface of the intermediate floating cylinder, the upper floating hole is a secondary stepped hole with decreasing cross-sectional diameter, and the support block is slidably matched with the hole portion at the upper end of the secondary stepped hole;

[0069] An upper floating spring, the connecting rod portion extends into the fixing hole, and an upper floating spring is sleeved on the connecting rod portion;

[0070] An intermediate floating spring is provided in the secondary stepped hole and abuts against the support block;

[0071] A lower floating spring is formed with a lower floating hole inwardly at the lower end of the middle floating cylinder, and a lower floating spring is arranged in the lower floating hole;

[0072] The two sides of the upper floating spring are respectively against the limit end cover and the support block; the two ends of the lower middle floating spring are against the support block and the bottom of the secondary stepped hole, and the two ends of the floating outer cylinder are against the bottom of the fixed hole and the bottom of the lower floating hole; and the bottom of the middle floating cylinder is away from the bottom of the fixed hole under the support of the lower floating spring, and its upper part is against the limit end cover.

[0073] In the present technical solution, the support block is supported and limited by the intermediate floating cylinder, the upper floating spring can ensure that the connecting rod is floated and fixed in the intermediate floating cylinder, and the intermediate floating spring can better play the role of spring support between the floating outer cylinder and the support block; and the setting of the lower floating spring can better provide elastic support for the intermediate floating outer cylinder, and the coordination of the overall structure of the elastic support assembly can ensure the good floating and elastic connection effect between the connecting rod and the annular sleeve.

[0074] In the above technical solution, further, it also includes a hydraulic transmission oil circuit and a control cabinet; the control cabinet is provided with a controller, a control circuit and a frequency converter; wherein the number of molding stations is 4, and two molding stations form a hydraulic matching group;

[0075] The hydraulic oil circuit includes:

[0076] Hydraulic receiving branches, a plurality of hydraulic receiving branches are arranged between the two forming stations in each hydraulic matching group, and each hydraulic receiving branch is respectively connected to the flow hole of a lower connecting sleeve of the two forming stations;

[0077] Accumulator: each hydraulic connection branch is provided with a small accumulator;

[0078] A pressure detection device is provided on each hydraulic connection branch;

[0079] Common rail pipe assembly, each hydraulic receiving branch has a boost pipe extending therefrom and connected to the common rail pipe assembly; each boost pipe is provided with an electric control valve, and a one-way valve is provided on the boost pipe at the side of the electric control valve away from the common rail pipe assembly;

[0080] A boost pump, the boost pump is connected to the common rail assembly through a pipeline;

[0081] A fuel tank, wherein the booster pump is connected to the fuel tank through a pipeline;

[0082] The controller is provided with a preset value of the pressure when the hydraulic receiving branch works normally. The pressure value in the hydraulic receiving branch is detected by the pressure detection device. When the pressure value is lower than the preset value, the hydraulic receiving branch is supplemented with pressure through the electric control valve and the booster pump.

[0083] In the technical scheme, the states of the buffer hydraulic rods on the hydraulic matching groups in the same hydraulic matching group are different, one is in a fully extended state and the other is in a fully retracted state, that is, an alternating extrusion mode; when the extended hydraulic telescopic rod is squeezed during the extrusion molding process of the molding station, the hydraulic oil in the hydraulic telescopic rod is pressed into the originally retracted hydraulic telescopic rod through the hydraulic receiving branch through the extrusion, prompting the lower ejector rod of another molding station to extend, and eject the extruded workpiece out of the lower die seat, so as to achieve the ejection of the workpiece without external pressure; and the accumulator and the booster pump are provided in conjunction with the electric control valve to ensure the oil pressure of each hydraulic receiving branch, so as to better ensure the good maneuverability of the lower ejector assembly. The molding mechanism can mold the workpiece through several molding mechanisms in sequence through the cooperation of the manipulator, and the manipulator is an interpolation material picker (i.e., taking the workpiece on a molding station and placing it on the station of the next molding step), so as to facilitate the production of multi-process extrusion parts.

[0084] The beneficial effects of the present invention are:

[0085] 1. The setting of the lower ejector assembly can ensure that the lower ejector rod can be pressed in better before the workpiece is formed, and can facilitate the ejection of the workpiece after forming;

[0086] 2. The guide valve plate can facilitate the discharge of oil in the buffer oil chamber, and ensure that the oil can be slowly fed into the buffer oil chamber, thereby preventing the telescopic rod from being ejected instantly, thereby reducing the yield rate;

[0087] 3. The alternating extrusion mode allows the workpiece to be ejected without external power, which is more conducive to production. BRIEF DESCRIPTION OF THE DRAWINGS

[0088] Figure 1 It is a schematic diagram of the structure of the present invention;

[0089] Figure 2 It is a structural schematic diagram of the lower ejection assembly in the present invention;

[0090] Figure 3 It is a structural schematic diagram of the buffer telescopic rod in the present invention;

[0091] Figure 4 yes Figure 3 A partial enlarged view of point Ⅰ in the middle;

[0092] Figure 5 It is a schematic structural diagram of the upper portion of the upper support rod in the present invention;

[0093] Figure 6 is a cross-sectional schematic diagram of the offset hinge seat of the present invention;

[0094] Figure 7 It is a structural schematic diagram of a fixed hinge seat in the present invention;

[0095] Figure 8 It is a structural schematic diagram of the hydraulic transmission oil circuit in the present invention;

[0096] The markings in the figure are as follows: 1-base, 2-lower die base, 3-upper support shell, 4-extrusion drive mechanism, 5-lower ejector rod, 6-external module, 7-limiting slide groove, 8-limiting rod, 9-internal clamping member, 10-internal return spring, 11-upper ejector support platform, 12-lower fixed support platform, 13-connecting block, 14-fixed hinge seat, 15-hinge receiving block, 16-offset hinge seat, 17-offset flange shaft, 18-anti-slip bolt, 19-connecting shaft, 20-limiting groove, 21-limiting bolt, 22-middle support sleeve, 23-middle receiving seat, 24-lower connecting sleeve, 25-external buffer spring, 26-upper connecting plate, 27-connecting rod part, 28-support block, 29-annular Sleeve, 30-lower piston part, 31-guide ring, 32-sealing ring assembly, 33-limiting edge, 34-inner spring seat, 35-guide valve plate, 36-buffer flow hole, 37-guide spring, 38-buffer oil chamber, 39-intermediate receiving shaft, 40-floating outer cylinder, 41-intermediate floating ring, 42-outer support plate, 43-end floating ring, 44-outer floating ring, 45-inner floating ring, 46-intermediate floating cylinder, 47-upper floating spring, 48-intermediate floating spring, 49-lower floating spring, 50-hydraulic receiving branch, 51-accumulator, 52-pressure detection device, 53-common rail pipe assembly, 54-boosting pump, 55-oil tank, 56-electric control valve, 100-molding station. DETAILED DESCRIPTION

[0097] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0098] The existing ball pin assembly includes:

[0099] The ball stud comprises a ball head and a pin rod at one side of the ball head, and a limited step is formed between the pin rod and the ball head;

[0100] The ball pin seat comprises a ball pin seat housing and a ball bowl provided in the ball pin seat housing. The ball head pin is inserted on the ball pin seat and the ball head is located in the ball bowl.

[0101] A dust cover is sleeved on the pin rod of the ball pin, with one end of the dust cover clamped on the pin rod and the other end clamped on the ball pin seat;

[0102] The ball stud is manufactured by extrusion process, and the specific process is as follows:

[0103] Step 1: Provide a ball pin and cut the ball pin;

[0104] Step 2: forming the bottom rod diameter of the ball pin by positive extrusion process;

[0105] Step 3: Preform the head of the ball pin;

[0106] Step 4: Forming the flange of the ball pin;

[0107] Step 5: Form the ball head of the ball pin.

[0108] Embodiment 1:

[0109] This embodiment provides a multi-station forming mechanism for a ball stud, including four forming stations 100 arranged side by side, each station being responsible for one step of forming the ball stud, such as the first station being responsible for forming the bottom rod diameter of the ball pin by a positive extrusion process, the second station being responsible for pre-forming the head of the ball pin, the third station being responsible for forming the ball pin flange, and the fourth station being responsible for forming the ball head of the ball pin.

[0110] Each molding station 100 includes:

[0111] A support assembly, the support assembly comprises a base 1 and a lower die base 2 installed on the base 1;

[0112] The extrusion assembly includes an upper support shell 3 disposed toward the base 1, an extrusion placement hole is formed in the upper support shell 3, an upper mold assembly and an extrusion reset assembly matched with the upper mold assembly are disposed in the extrusion placement hole; and an extrusion drive mechanism 4 is disposed at one end of the upper support shell 3 away from the base 1;

[0113] A lower ejector assembly is provided at the bottom of the support assembly, and a lower ejector rod 5 is provided on the lower ejector assembly and extends into the lower die seat 2 of the base 1;

[0114] The upper die assembly includes: an outer die block 6, the extrusion placement hole includes an opening and closing hole extending inward from the end surface of the upper support shell 3, the opening and closing hole is tapered, a plurality of circumferentially distributed outer die blocks 6 are arranged on the opening and closing hole, the outer die blocks 6 can be telescopically slidable on the opening and closing hole, and an upper die cavity is formed in the middle of the plurality of circumferentially distributed outer die blocks 6; a limiting slide groove 7 is arranged at the side end of each outer die block 6, and a limiting rod 8 inserted into the limiting slide groove 7 is arranged on the outer side of the upper support shell 3;

[0115] The squeeze reset assembly includes:

[0116] The inner pressing member 9, the extrusion placement hole also includes an inner receiving hole arranged on the inner side of the opening and closing hole, and an inner pressing member 9 abutting against the outer module 6 is arranged on the outer side of the inner receiving hole;

[0117] An inner return spring 10 is arranged at the bottom of the inner receiving hole, and the other end of the inner return spring 10 abuts against the inner pressing member 9.

[0118] In this embodiment, the support assembly mainly supports and places the lower die base 2 and the lower ejection assembly; the extrusion assembly drives the upper die to apply pressure to the lower die base 2, thereby forming the shape of the parts at different stages; the upper die assembly is composed of several upper modules, and the upper modules are telescopically slidably matched with the opening and closing holes, so that several outer modules 6 can move up and close at the same time during the mold closing process, thereby forming the mold cavity of the upper die; the internal clamping assembly can provide good support for the outer module 6, and the internal reset spring 10 can timely eject the upper module when the extrusion drive mechanism 4 is reset, thereby facilitating the demoulding of the parts; and the limiting slide 7 and limiting rod 8 can prevent the outer module 6 from detaching from the upper support shell 3, thereby ensuring the stability of the equipment operation. The shapes of the molding cavities in the lower die base 2 and the upper die assembly in the molding station 100 in different steps are different.

[0119] Embodiment 2:

[0120] This embodiment provides a multi-station molding mechanism for a ball stud, which, in addition to the technical solutions of the above embodiments, also has the following technical features. The lower ejection assembly includes:

[0121] An upper ejection support platform 11, a lower ejection rod 5 is arranged at the upper end of the upper ejection support platform 11, and the upper ejection support platform 11 is a regular hexagon;

[0122] A lower fixed support platform 12, the lower fixed support platform 12 and the upper ejection support platform 11 are symmetrically arranged, and the lower fixed support platform 12 is a regular hexagon;

[0123] A buffer telescopic rod, wherein a plurality of telescopic rod assemblies distributed in a cylindrical manner are arranged between the upper ejection support platform 11 and the lower fixed support platform 12, and each telescopic rod assembly is composed of two buffer telescopic rods symmetrically arranged and distributed in a V shape;

[0124] Anti-deflection connectors: Anti-deflection connectors are provided at both ends of the buffer telescopic rod, and the buffer telescopic rod is connected to the upper ejection support platform 11 and the lower fixed support platform 12 through the anti-deflection connectors at both ends;

[0125] The six side walls of the upper ejection support platform 11 and the lower fixed support platform 12 are each formed with a protruding and mutually symmetrical connecting block 13; the lower ends of the two buffer telescopic rods in the telescopic rod assembly are fixed to the same connecting block 13 on the lower fixed support platform 12 through an anti-bias connecting piece, and the other ends of the two buffer telescopic rods extend to both sides and are respectively fixed to the adjacent connecting blocks 13 on both sides of the symmetrical connecting block 13 of the upper ejection support platform 11 through anti-bias connecting pieces.

[0126] In this embodiment, an inner mounting groove for accommodating the lower ejection assembly is provided at the bottom of the base 1, the cross-section of the inner mounting groove is a regular hexagon, and a sliding groove cooperating with the connecting block 13 is formed on each side wall of the hexagon, the depth of the sliding groove is greater than the width of the connecting block 13, and the cooperation of the sliding groove and the connecting block 13 can ensure the smooth operation of the upper ejection support platform 11 and prevent the upper ejection support platform 11 from rotating; and the upper ejection support platform 11 is used to fix the upper ejection rod, and drives the upper ejection rod to move up and down by playing a transmission role; the first fixed platform plays the role of bottom support and fixing, and the buffer telescopic rod can realize the upper ejection support platform 11 relative to the lower fixed support platform 12. The upper ejection support platform 11 can be prevented from deflecting when it is displaced by a plurality of buffer telescopic rods and anti-bias connectors; and the telescopic rod assembly is composed of two buffer telescopic rods symmetrically arranged and V-shaped, so as to ensure the stability of telescopic expansion and the overall structural strength of the lower ejection assembly.

[0127] Embodiment 3:

[0128] This embodiment provides a multi-station molding mechanism for a ball stud, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0129] Anti-deflection connector includes:

[0130] A fixed hinge seat 14, which is used to be fixedly connected to the connecting block 13;

[0131] A hinge receiving block 15, one side of the hinge receiving block 15 is rotatably connected to the fixed hinge seat 14 via a rotating shaft;

[0132] An offset hinge seat 16, the offset hinge seat 16 is connected to the other side of the hinge receiving block 15, and the hinge receiving block 15 is rotatably connected to the offset hinge seat 16 via a rotating shaft;

[0133] The offset flange shaft 17 has a placement groove formed inwardly on a side of the offset hinge seat 16 away from the fixed hinge seat 14, an offset bearing is arranged in the placement groove, and the offset flange shaft 17 is arranged on the offset bearing, and the flange shaft is provided with an anti-dropping bolt 18 that passes through the offset hinge seat 16 and limits it; the offset flange shaft 17 is connected to the buffer telescopic rod through bolts;

[0134] The two ends of the buffer telescopic rod are respectively fixedly connected to the offset flange shaft 17 by bolts and nuts; a connecting shaft 19 is fixedly arranged on the side of the fixed hinge seat 14 away from the offset hinge seat 16, a connecting groove matching the connecting shaft 19 is formed on the connecting block 13, and a limiting groove 20 is arranged on the side wall of the connecting shaft 19, and a limiting bolt 21 is arranged on the connecting block 13, and the limiting bolt 21 is inserted into the connecting groove and abuts against the limiting groove 20.

[0135] In this embodiment, the fixed seat hinge is used to connect with the upper ejection support platform 11 or the lower fixed support platform 12, and the offset hinge seat 16 cooperates with the offset flange shaft 17 to be connected with the telescopic rod, so that even if the buffer telescopic rod rotates, it will not affect the overall operation effect of the buffer telescopic rod; and both ends of the buffer telescopic rod are connected by anti-bias connectors to timely adjust the angle of the buffer telescopic rod during the extension and retraction process of the buffer telescopic rod, thereby ensuring the stability of the displacement of the upper ejection support platform 11.

[0136] Embodiment 4:

[0137] This embodiment provides a multi-station molding mechanism for a ball stud, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0138] The cushioned telescopic rod includes:

[0139] An upper support rod, one end of which is connected to an anti-deflection connecting piece on the upper ejection support platform 11;

[0140] An intermediate support sleeve 22 is provided on the lower side of the upper support rod, and the upper support rod and the intermediate support sleeve 22 are slidably matched;

[0141] An intermediate receiving seat 23 is provided at the bottom of the intermediate supporting sleeve 22;

[0142] A lower connecting sleeve 24, one end of which is fixedly connected to the middle receiving seat 23, and the other end of which is connected to the anti-deflection connecting piece on the lower fixed support platform 12;

[0143] An external buffer spring 25 is provided between the upper support rod and the middle sleeve;

[0144] An inner buffer component is arranged on the middle receiving seat 23 .

[0145] In this embodiment, the upper support rod is used to provide good connection and support for the upper ejection support platform 11, and the intermediate support sleeve provides telescopic space for the upper support rod, and the intermediate receiving seat 23 is used to limit the upper support seat and place the internal buffer component. The external buffer spring 25 can provide good elastic buffering and support effects when the upper support rod is telescoped. The setting of the internal buffer component can ensure good shock-absorbing and buffering effects during the telescope process of the upper support rod.

[0146] Embodiment 5:

[0147] This embodiment provides a multi-station molding mechanism for a ball stud, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0148] The upper support rod includes:

[0149] The upper connecting plate 26 is annular and has a plurality of connecting holes evenly distributed on the outer edge thereof. The upper supporting rod is fixedly connected to the offset flange shaft 17 on the anti-bias connecting member through the upper connecting plate 26. A connecting rod portion 27 is formed downwardly on the lower end surface of the upper connecting plate 26, and a supporting block 28 is formed at the bottom of the connecting rod portion 27.

[0150] The annular sleeve 29 is located at the lower side of the upper connecting plate, and a fixing hole is formed inwardly at the upper end of the annular sleeve, and an elastic support component that abuts against the support block 28 is arranged in the fixing hole, and a limiting end cover of the limiting support block 28 is arranged at the upper end of the annular sleeve 29;

[0151] A lower piston portion 30 is provided at the lower end of the annular sleeve 29;

[0152] An inner floating assembly is connected between the annular sleeve 29 and the lower piston portion 30 through an inner floating assembly;

[0153] A guide ring 31 is provided with a guide groove in the middle of the outer wall of the lower piston part 30, and a guide ring 31 made of metal material is provided on the guide groove;

[0154] The sealing ring assembly 32 is provided on the outer wall of the lower piston part 30 and on both sides of the guide groove. The sealing ring assembly 32 is provided in the sealing groove. The sealing ring assembly 32 includes a first sealing ring and a second sealing ring.

[0155] In this embodiment, the upper connecting plate 26 can be conveniently fixedly connected to the offset flange shaft 17; the cooperation of the annular sleeve 29 and the elastic support assembly can ensure a good floating connection to the upper connecting plate 26; the setting of the lower piston part 30 can increase the contact area between the inside of the upper support rod and the lower connecting sleeve 24, thereby increasing the buffering and shock absorption effects; the unloaded parts described in the internal floating assembly play a good floating buffering and connection role between the annular sleeve 29 and the lower piston part 30; the guide ring 31 can facilitate the sliding cooperation between the lower piston part 30 and the intermediate support sleeve 22, and the setting of the sealing assembly can improve the fit and sealing effect between the lower piston part 30 and the intermediate support sleeve 22.

[0156] Embodiment 6:

[0157] This embodiment provides a multi-station molding mechanism for a ball stud, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0158] The cross section of the upper connecting plate 26 is larger than the cross section of the intermediate support sleeve 22, and a limiting edge 33 is integrally formed on the outer wall of the intermediate support sleeve 22 on one side close to the upper connecting plate 26, and the two ends of the outer buffer spring 25 are respectively against the limiting edge 33 and the upper connecting plate 26; the inner buffer assembly includes:

[0159] The inner spring seat 34 is provided with a stepped hole penetrating therethrough on the middle receiving seat 23, the stepped hole gradually decreases in diameter from the bottom of the middle receiving seat 23 upwards, the inner spring seat 34 is threadedly connected to the bottom of the stepped hole, a through hole penetrating therethrough is formed in the middle of the inner spring seat 34, and a plurality of guide holes evenly distributed along the circumference are formed on the outer side of the through hole;

[0160] A guide valve plate 35 is provided at the upper end of the stepped hole to block the upper part of the stepped hole, and a buffer flow hole 36 is formed in the middle of the guide valve plate 35;

[0161] A guide spring 37 is provided between the guide valve plate 35 and the inner spring seat 34, and a limiting protrusion is formed on the guide valve plate 35 to clamp one end of the guide spring 37, and a limiting protrusion is formed in the middle of the inner spring seat 34 to clamp the other end of the guide spring 37;

[0162] A lower connecting flange is formed at the bottom of the lower connecting sleeve 24, and the lower connecting sleeve 24 is fixedly connected to the offset flange shaft 17 on the anti-deviation connecting piece through the lower connecting flange. A buffer oil chamber 38 is formed in the lower connecting sleeve 24, and a flow hole connected to the buffer oil chamber 38 is provided on the side wall of the lower connecting sleeve 24.

[0163] In this embodiment, buffer oil is injected into the buffer oil chamber 38; the setting of the limit edge 33 can better facilitate the installation and limiting of the outer buffer spring 25; and the setting of the inner spring seat 34 plays a good supporting role for the guide valve plate 35 with the cooperation of the guide spring 37, and the setting of the guide hole and the through hole on the inner spring seat 34 can better facilitate the flow of the buffer solution, and the set guide valve plate 35 can facilitate the discharge of the oil in the buffer oil chamber 38, and ensure that the oil can be slowly introduced into the buffer oil chamber 38, thereby preventing the telescopic rod from being ejected instantly, thereby reducing the yield rate; at the same time, when the upper support rod is pressed downward, it is squeezed with the buffer oil through the lower piston part 30, thereby playing a good buffering and shock absorbing role, thereby reducing the impact force on the parts at the moment of squeezing.

[0164] Embodiment 7:

[0165] This embodiment provides a multi-station molding mechanism for a ball stud, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0166] The buffer oil chamber 38 in the middle support sleeve 22 is connected to the stepped hole, the piston portion of the lower piston is in clearance with the inner wall of the buffer oil chamber 38, and the guide ring 31 and the sealing ring assembly 32 are against the inner wall of the buffer oil chamber 38;

[0167] The internal floating components include:

[0168] The middle receiving shaft 39, the two ends of which are connected to the lower piston part 30 and the annular sleeve 29 respectively, and are respectively threadedly connected to the lower piston part 30 and the annular sleeve;

[0169] The floating outer cylinder 40 is coaxially arranged outside the intermediate receiving shaft 39. The cross section of the floating outer cylinder 40 is annular and is slidably matched with the inner wall of the buffer oil chamber 38. Support edges are formed on both sides of the floating outer cylinder 40 toward the middle.

[0170] A side floating ring assembly is provided with a plurality of side floating ring assemblies which are equally spaced in the floating outer cylinder;

[0171] An intermediate floating ring 41 is provided between two adjacent side floating ring assemblies, and two sides of the intermediate floating ring 41 are respectively abutted against the side floating ring assemblies on both sides;

[0172] An outer support plate 42 is provided on both sides of the equidistantly distributed side floating ring assembly and on the inner side of the support edge. The intermediate receiving shaft 39 passes through the middle of the outer support plate 42 and is fixed by a compression nut;

[0173] An end floating ring 43 is disposed on the inner side of each outer support plate 42 and abuts against the floating ring assembly.

[0174] In this embodiment, the provision of the intermediate receiving shaft 39 can facilitate the connection between the lower piston portion 30 and the annular sleeve 29; the floating outer cylinder is used to accommodate the side floating ring assembly and the intermediate floating ring 41, and the provision of the outer support plate 42 and the end floating ring 43 can limit the placement of the side floating ring assembly and the intermediate floating ring 41; and the provision of the outer support plate 42 can also play a role in connecting with the intermediate receiving shaft 39, and the intermediate receiving shaft 39 evenly distributes the force to the side floating ring assembly and the intermediate floating ring 41 through the outer support plate 42.

[0175] Embodiment 8:

[0176] This embodiment provides a multi-station molding mechanism for a ball stud, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0177] The cross section of the middle floating ring 41 is two isosceles trapezoids that are symmetrical to each other, and the slope angle of the isosceles trapezoid is 50-70°;

[0178] The side floating ring assembly includes:

[0179] The outer floating ring 44 has an outer wall that is slidably matched with the floating outer cylinder 40, and an inner wall of the outer floating ring 44 is formed with an outer floating slope that is high in the middle and low on both sides, and the outer floating slope abuts against the outer wall of the middle floating ring 41;

[0180] An inner floating ring 45, the outer wall of which is formed with an inner floating slope symmetrical to the outer floating slope, and the inner floating slope abuts against the inner side wall of the middle floating ring 41;

[0181] The adjacent side floating ring assemblies form an outer floating gap under the support of the middle floating ring 41, and the adjacent middle floating ring 41 forms a middle floating gap under the support of the side floating ring assemblies;

[0182] The end floating ring 43 is fixedly connected to the outer support plate 42, and is in an isosceles trapezoidal shape. The end portion extends between the outer floating ring 44 and the inner floating ring 45 in the side floating ring assembly, and abuts against the outer floating slope and the inner floating slope.

[0183] In this embodiment, by sequentially arranging the side floating ring assembly and the middle floating ring 41, and with the cooperation of the outer floating slope, the inner floating slope and the middle floating ring 41, it can achieve a good effect of resisting bidirectional tension and extrusion; at the same time, it can achieve an effect of resisting bending and swinging, thereby ensuring good stability and structural strength of the upper support rod, thereby better ensuring the overall performance of the lower ejection assembly.

[0184] Embodiment 9:

[0185] This embodiment provides a multi-station molding mechanism for a ball stud, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0186] The elastic support assembly includes:

[0187] The middle floating cylinder 46 has an upper floating hole formed in the middle of the upper end surface of the middle floating cylinder 46. The upper floating hole is a secondary stepped hole with decreasing cross-sectional diameter. The support block 28 is slidably matched with the hole portion at the upper end of the secondary stepped hole.

[0188] An upper floating spring 47, the connecting rod portion 27 extends into the fixing hole, and an upper floating spring 47 is sleeved on the connecting rod portion 27;

[0189] An intermediate floating spring 48 is provided in the secondary stepped hole to abut against the support block 28;

[0190] A lower floating spring 49 is formed inwardly at the lower end of the middle floating cylinder 46 with a lower floating hole, and a lower floating spring 49 is arranged in the lower floating hole;

[0191] The two sides of the upper floating spring 47 are respectively against the limit end cover and the support block 28; the two ends of the lower middle floating spring 48 are against the support block and the bottom of the secondary stepped hole, and the two ends of the floating outer cylinder are against the bottom of the fixed hole and the bottom of the lower floating hole; and the bottom of the middle floating cylinder 46 is away from the bottom of the fixed hole under the support of the lower floating spring 49, and its upper part is against the limit end cover.

[0192] In this embodiment, the support block 28 is supported and limited by the intermediate floating cylinder 46, the upper floating spring 47 can ensure that the connecting rod is floated and fixed in the intermediate floating cylinder, and the intermediate floating spring 48 can better play the role of spring support between the floating outer cylinder and the support block 28; and the setting of the lower floating spring 49 can better provide elastic support for the intermediate floating outer cylinder, and through the coordination of the overall structure of the elastic support assembly, it can ensure the good floating and elastic connection effect between the connecting rod and the annular sleeve 29.

[0193] Embodiment 10:

[0194] This embodiment provides a multi-station molding mechanism for a ball stud, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0195] It also includes a hydraulic transmission oil circuit and a control cabinet; the control cabinet is provided with a controller, a control circuit and a frequency converter; the number of the forming stations 100 is 4, and two forming stations 100 form a hydraulic matching group;

[0196] The hydraulic oil circuit includes:

[0197] A hydraulic receiving branch 50, wherein a plurality of hydraulic receiving branches 50 are arranged between two forming stations 100 in each hydraulic matching group, and each hydraulic receiving branch 50 is respectively connected to a flow hole of a lower connecting sleeve 24 in the two forming stations 100;

[0198] Accumulator 51, each hydraulic receiving branch 50 is provided with a small accumulator 51;

[0199] A pressure detection device 52 is provided on each hydraulic receiving branch;

[0200] Common rail pipe assembly 53, each hydraulic receiving branch 50 extends a boost pipe connected to the common rail pipe assembly 53; each boost pipe is provided with an electric control valve 56, and a one-way valve is provided on the boost pipe at the side of the electric control valve 56 away from the common rail pipe assembly 53;

[0201] A boost pump 54, the boost pump 54 is connected to the common rail assembly 53 through a pipeline;

[0202] The oil tank 55, the booster pump 54 is connected to the oil tank 55 through a pipeline;

[0203] The controller is provided with a preset value of the pressure when the hydraulic receiving branch 50 is working normally. The pressure value in the hydraulic receiving branch 50 is detected by the pressure detection device 52. When the pressure value is lower than the preset value, the hydraulic receiving branch 50 is supplemented with pressure through the electric control valve 56 and the booster pump 54.

[0204] In this embodiment, the states of the buffer hydraulic rods in the same hydraulic matching group are different, one is in a fully extended state and the other is in a fully retracted state, that is, an alternating extrusion mode; when the extended hydraulic telescopic rod is squeezed during the extrusion molding process of the molding station 100, the hydraulic oil in the hydraulic telescopic rod is pressed into the originally retracted hydraulic telescopic rod through the hydraulic receiving branch 50 by extrusion, prompting the lower ejector rod 5 of another molding station 100 to extend, and eject the extruded workpiece out of the lower die seat 2, so as to achieve the ejection of the workpiece without external pressure; and the accumulator 51 and the booster pump 54 are provided in conjunction with the electric control valve 56 to ensure the oil pressure of each hydraulic receiving branch 50, so as to better ensure the good mobility of the lower ejector assembly. The molding mechanism can mold the workpiece through several molding mechanisms in sequence through the cooperation of the manipulator, and the manipulator is an interpolation material picker (i.e., taking the workpiece on a molding station 100 and placing it on the station of the next molding step), so as to facilitate the production of multi-process extrusion parts.

[0205] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A multi-station forming mechanism for a ball stud, comprising a plurality of forming stations (100) arranged side by side, characterized in that: Each of the molding stations (100) comprises: A support assembly, the support assembly comprising a base (1) and a lower die base (2) mounted on the base (1); An extrusion assembly, the extrusion assembly comprising an upper support shell (3) arranged toward the base (1), an extrusion placement hole formed in the upper support shell (3), an upper die assembly and an extrusion reset assembly cooperating with the upper die assembly arranged in the extrusion placement hole; and an extrusion drive mechanism (4) is arranged at one end of the upper support shell (3) away from the base (1); A lower ejector assembly is provided at the bottom of the support assembly, and a lower ejector rod (5) is provided on the lower ejector assembly and extends into a lower die seat (2) of the base (1); The upper mold assembly includes: The outer module (6) is a plurality of outer modules (6) arranged in a circle, the outer module (6) being able to slide telescopically on the opening and closing hole, and an upper mold cavity is formed in the middle of the plurality of outer modules (6) arranged in a circle; a limiting slide groove (7) is arranged at the side end of each of the outer modules (6), and a limiting rod (8) inserted into the limiting slide groove (7) is arranged on the outer side of the upper supporting shell (3); The extrusion reset assembly comprises: An internal pressing member (9), wherein the extrusion placement hole further comprises an internal receiving hole arranged on the inner side of the opening and closing hole, and an internal pressing member (9) abutting against the external module (6) is arranged on the outer side of the internal receiving hole; An internal return spring (10), wherein an internal return spring (10) is arranged at the bottom of the internal receiving hole, and the other end of the internal return spring (10) abuts against the internal pressing member (9); The lower ejector assembly comprises: An upper ejection support platform (11), wherein the lower ejection rod (5) is arranged at the upper end of the upper ejection support platform (11), and the upper ejection support platform (11) is in the shape of a regular hexagon; A lower fixed support platform (12), wherein the lower fixed support platform (12) and the upper ejection support platform (11) are symmetrically arranged with each other, and the lower fixed support platform (12) is in the shape of a regular hexagon; A buffer telescopic rod, wherein a plurality of telescopic rod assemblies distributed in a cylindrical pattern are arranged between the upper ejection support platform (11) and the lower fixed support platform (12), and each of the telescopic rod assemblies is composed of two buffer telescopic rods that are symmetrically arranged and distributed in a V shape; Anti-deflection connecting pieces, wherein the two ends of the buffer telescopic rod are respectively provided with anti-deflection connecting pieces, and the buffer telescopic rod is connected to the upper ejection support platform (11) and the lower fixed support platform (12) through the anti-deflection connecting pieces at the two ends; The six side walls of the upper ejection support platform (11) and the lower fixed support platform (12) are each formed with a protruding and mutually symmetrical connecting block (13); the lower ends of the two buffer telescopic rods in the telescopic rod assembly are both fixed to the same connecting block (13) on the lower fixed support platform (12) through an anti-bias connecting piece, and the other ends of the two buffer telescopic rods extend to both sides and are respectively fixed to the connecting blocks (13) on both sides of the symmetrical connecting block (13) of the upper ejection support platform (11) through the anti-bias connecting piece.

2. A multi-station forming mechanism for a ball stud according to claim 1, characterized in that: The anti-deflection connecting piece comprises: A fixed hinge seat (14), wherein the fixed hinge seat (14) is used to be fixedly connected to the connecting block (13); A hinge receiving block (15), one side of the hinge receiving block (15) being rotatably connected to the fixed hinge seat (14) via a rotating shaft; An offset hinge seat (16), wherein the offset hinge seat (16) is connected to the other side of the hinge receiving block (15), and the hinge receiving block (15) is rotatably connected to the offset hinge seat (16) via a rotating shaft; An offset flange shaft (17) is formed with a placement groove inwardly on a side of the offset hinge seat (16) away from the fixed hinge seat (14), an offset bearing is arranged in the placement groove, and an offset flange shaft (17) is arranged on the offset bearing, and the offset flange shaft is provided with an anti-drop bolt (18) that passes through the offset hinge seat (16) and limits it; The two ends of the buffer telescopic rod are respectively fixedly connected to the offset flange shaft (17) by bolts and nuts; a connecting shaft (19) is fixedly arranged on the side of the fixed hinge seat (14) away from the offset hinge seat (16); a connecting groove matching the connecting shaft (19) is formed on the connecting block (13); and a limiting groove (20) is arranged on the side wall of the connecting shaft (19); a limiting bolt (21) is arranged on the connecting block (13); the limiting bolt (21) is inserted into the connecting groove and abuts against the limiting groove (20).

3. The multi-station forming mechanism for a ball stud according to claim 1, characterized in that: The buffer telescopic rod comprises: An upper support rod, one end of which is connected to an anti-deflection connecting piece on the upper ejection support platform (11); An intermediate support sleeve (22), wherein the intermediate support sleeve (22) is arranged on the lower side of the upper support rod, and the upper support rod and the intermediate support sleeve (22) are slidably matched; An intermediate receiving seat (23), wherein an intermediate receiving seat (23) is arranged at the bottom of the intermediate supporting sleeve (22); A lower connecting sleeve (24), one end of which is fixedly connected to the middle receiving seat (23), and the other end of which is connected to an anti-deflection connecting piece on the lower fixed support platform (12); An external buffer spring (25), wherein an external buffer spring (25) is arranged between the upper support rod and the middle sleeve; An inner buffer component is arranged on the middle receiving seat (23).

4. A multi-station forming mechanism for a ball stud according to claim 3, characterized in that: The upper support rod comprises: An upper connecting plate (26), the upper connecting plate (26) being annular and having a plurality of connecting holes evenly distributed along a circumference on its outer edge, the upper supporting rod being fixedly connected to the offset flange shaft (17) on the anti-deviation connecting member via the upper connecting plate (26), and a connecting rod portion (27) being formed downwardly on the lower end surface of the upper connecting plate (26), and a supporting block (28) being formed at the bottom of the connecting rod portion (27); an annular sleeve (29), the annular sleeve (29) being located at the lower side of the upper connecting plate (26), and having an inwardly formed fixing hole at the upper end of the annular sleeve (29), and having an elastic supporting component abutting against the supporting block (28) disposed in the fixing hole, and having a limiting end cover of the limiting supporting block (28) disposed at the upper end of the annular sleeve (29); A lower piston part (30), wherein the lower end of the annular sleeve (29) is provided with a lower piston part (30); An inner floating assembly is connected between the annular sleeve (29) and the lower piston portion (30) via the inner floating assembly; A guide ring (31), wherein a guide groove is provided on the middle portion of the outer wall of the lower piston portion (30), and a guide ring (31) made of a metal material is provided on the guide groove; A sealing ring assembly (32) is provided on the outer wall of the lower piston part (30) and on both sides of the guide groove. A sealing groove is provided in the sealing groove. The sealing ring assembly (32) comprises a first sealing ring and a second sealing ring.

5. A multi-station forming mechanism for a ball stud according to claim 4, characterized in that: The cross section of the upper connecting plate (26) is larger than the cross section of the middle supporting sleeve (22), and a limiting edge (33) is integrally formed on the outer wall of the middle supporting sleeve (22) on one side close to the upper connecting plate (26), and the two ends of the outer buffer spring (25) respectively abut against the limiting edge (33) and the upper connecting plate (26); the inner buffer assembly comprises: An inner spring seat (34), wherein a stepped hole is provided on the intermediate receiving seat (23), the stepped hole decreasing in diameter from the bottom of the intermediate receiving seat (23) upwards, the inner spring seat (34) is threadedly connected to the bottom of the stepped hole, a through hole is formed in the middle of the inner spring seat (34), and a plurality of guide holes evenly distributed along the circumference are formed on the outer side of the through hole; A guide valve plate (35), wherein a guide valve plate (35) for blocking the upper part of the step hole is arranged at the upper end of the step hole, and a buffer flow hole (36) is formed in the middle of the guide valve plate (35); A guide spring (37), wherein the guide spring (37) is arranged between the guide valve plate (35) and the inner spring seat (34), and a limiting protrusion is formed on the guide valve plate (35) for clamping one end of the guide spring (37), and a limiting protrusion is formed in the middle of the inner spring seat (34) for clamping the other end of the guide spring (37); A lower connecting flange is formed at the bottom of the lower connecting sleeve (24), the lower connecting sleeve (24) is fixedly connected to the offset flange shaft (17) on the anti-deviation connecting member via the lower connecting flange, a buffer oil chamber (38) is formed in the lower connecting sleeve (24), and a flow hole communicating with the buffer oil chamber (38) is provided on the side wall of the lower connecting sleeve (24).

6. A multi-station forming mechanism for a ball stud according to claim 5, characterized in that: The buffer oil chamber in the intermediate support sleeve (22) is communicated with the stepped hole, the lower piston portion (30) is clearance-matched with the inner wall of the buffer oil chamber (38), and the guide ring (31) and the sealing ring assembly (32) are in contact with the inner wall of the buffer oil chamber (38); The inner floating assembly includes: An intermediate receiving shaft (39), the two ends of which are respectively connected to the lower piston part (30) and the annular sleeve (29), and are respectively threadedly connected to the lower piston part (30) and the annular sleeve (29); A floating outer cylinder (40) is coaxially arranged outside the intermediate receiving shaft (39), the floating outer cylinder (40) has a ring-shaped cross section, and is slidably matched with the inner wall of the buffer oil chamber (38), and support edges are formed on both sides of the floating outer cylinder (40) toward the middle; A side floating ring assembly, wherein a plurality of side floating ring assemblies distributed at equal distances are arranged in the floating outer cylinder (40); An intermediate floating ring (41) is provided between two adjacent side floating ring assemblies, and two sides of the intermediate floating ring (41) respectively abut against the side floating ring assemblies on both sides; An outer support plate (42) is provided on both sides of the equidistantly distributed side floating ring assembly and on the inner side of the support edge, and the intermediate receiving shaft (39) passes through the middle of the outer support plate (42) and is fixed by a clamping nut; An end floating ring (43) is provided on the inner side of each of the outer support plates (42) to abut against the floating ring assembly.

7. A multi-station forming mechanism for a ball stud according to claim 6, characterized in that: The cross section of the intermediate floating ring (41) is two isosceles trapezoids that are symmetrical to each other, and the slope angle of the isosceles trapezoid is 50-70°; The side floating ring assembly comprises: An outer floating ring (44), wherein the outer wall of the outer floating ring (44) is slidably matched with the floating outer cylinder (40), and the inner wall of the outer floating ring (44) is formed with an outer floating slope with a high middle portion and two bottom sides, and the outer floating slope abuts against the outer side wall of the middle floating ring (41); An inner floating ring (45), wherein the outer wall of the inner floating ring (45) is formed with an inner floating slope which is symmetrical to the outer floating slope, and the inner floating slope abuts against the inner side wall of the middle floating ring (41); The adjacent side floating ring assemblies form an outer floating gap under the support of the middle floating ring (41), and the adjacent middle floating ring (41) forms a middle floating gap under the support of the side floating ring assemblies; The end floating ring (43) is fixedly connected to the outer support plate (42), is in the shape of an isosceles trapezoid, and its end extends between the outer floating ring (44) and the inner floating ring (45) in the side floating ring assembly, and abuts against the outer floating slope and the inner floating slope.

8. A multi-station forming mechanism for a ball stud according to claim 7, characterized in that: The elastic support assembly comprises: An intermediate floating cylinder (46), wherein an upper floating hole is formed at the middle of the upper end surface of the intermediate floating cylinder (46), the upper floating hole being a secondary stepped hole with a decreasing cross-sectional diameter, and the support block (28) is slidably matched with a hole portion at the upper end of the secondary stepped hole; An upper floating spring (47), wherein the connecting rod portion (27) extends into the fixing hole, and an upper floating spring (47) is sleeved on the connecting rod portion (27); An intermediate floating spring (48), wherein an intermediate floating spring (48) is disposed in the secondary stepped hole and abuts against the support block (28); A lower floating spring (49), wherein a lower floating hole is formed inwardly at the lower end of the intermediate floating cylinder (46), and a lower floating spring (49) is arranged in the lower floating hole; The two sides of the upper floating spring (47) are respectively against the limit end cover and the support block (28); the two ends of the lower intermediate floating spring (48) are against the support block (28) and the bottom of the secondary stepped hole; the two ends of the floating outer cylinder (40) are against the bottom of the fixed hole and the bottom of the lower floating hole; and the bottom of the intermediate floating cylinder (46) is away from the bottom of the fixed hole under the support of the lower floating spring (49), and its upper part is against the limit end cover.

9. A multi-station forming mechanism for a ball stud according to claim 8, characterized in that: It also includes a hydraulic transmission oil circuit and a control cabinet; the control cabinet is provided with a controller, a control circuit and a frequency converter; wherein the number of the molding stations (100) is an even number, and two molding stations (100) form a hydraulic matching group; The hydraulic transmission oil circuit comprises: A hydraulic receiving branch circuit (50), wherein a plurality of hydraulic receiving branch circuits (50) are arranged between two forming stations (100) in each hydraulic matching group, and each hydraulic receiving branch circuit (50) is respectively connected to a flow hole of a lower connecting sleeve (24) in the two forming stations (100); An accumulator (51), each of the hydraulic receiving branches (50) is provided with a small accumulator (51); A pressure detection device (52), wherein each of the hydraulic receiving branches (50) is provided with a pressure detection device (52); A common rail pipe assembly (53), each of the hydraulic receiving branches (50) extending therefrom has a boost pipe connected to the common rail pipe assembly (53); and each of the boost pipes is provided with an electric control valve (56); A boost pump (54), wherein the boost pump (54) is connected to the common rail assembly (53) via a pipeline; An oil tank (55), wherein the booster pump (54) is connected to the oil tank (55) via a pipeline; The controller is provided with a preset value of the pressure of the hydraulic receiving branch (50) when the hydraulic receiving branch (50) is working normally. The pressure value in the hydraulic receiving branch (50) is detected by a pressure detection device (52). When the pressure value is lower than the preset value, the pressure of the hydraulic receiving branch (50) is supplemented by an electric control valve (56) and a booster pump (54).

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