CN114713737B

CN114713737B - Machining process of metal flow guide nozzle of oil tank

Info

Publication number: CN114713737B
Application number: CN202210245686.5A
Authority: CN
Inventors: 张冶桥; 崔来敏; 吕琪; 任浩鹏
Original assignee: Yangzhou Huaguang New Material Co ltd
Current assignee: Yangzhou Huaguang New Material Co ltd
Priority date: 2022-03-14
Filing date: 2022-03-14
Publication date: 2022-12-09
Anticipated expiration: 2042-03-14
Also published as: CN114713737A

Abstract

A processing technique of a metal flow guide nozzle of an oil tank. Relates to the technical field of automobile part production. The metal material shaping processing can be continuously carried out on the premise of ensuring the quality, the process continuity is strong, the process cost is reduced, the labor is saved, and the production efficiency is improved. The method comprises a blanking process for preparing the circular sheet blank, and also comprises the following processes of 1) at least secondary stretching; 2) Cutting the flash; 3) At least one time of synchronous thread shaping procedure of the inner surface and the outer surface; 4) A mouth hole treatment process; 5) And shaping; 6) And performing bright annealing treatment, and finishing. The invention sets continuous stations on a press machine to carry out automatic continuous sheet forming processing, adopts the thread forming die unit on the outer wall of the flow guide nozzle to carry out synchronous inner surface bulging and outer surface buckling operation, and completes thread forming under the condition of surface contact. The processing technology of the invention has high production efficiency, and heat treatment is carried out after the shaping of the finished product is finished by continuous processing operation, thereby saving working procedures and greatly improving the working efficiency.

Description

Machining process of metal flow guide nozzle of oil tank

Technical Field

The invention relates to the technical field of automobile part production, in particular to improvement of a special processing technology of a metal flow guide nozzle of an oil filling port of an automobile oil tank.

Background

The oil filling pipe of the automobile oil tank is provided with a flow guide nozzle which is used as an oil gun interface when oil is filled. The flow guide nozzle is generally in an eccentric bell mouth shape, and internal threads are arranged in the bell mouth and used for connecting an oil tank cover and sealing an oil tank. As a popular automobile part, the production process is realized according to the following process steps: firstly stretching, then carrying out heat treatment, then spinning the screw teeth, and finally reshaping. The method specifically comprises the following two main process flows:

1. in the traditional process, in the stretching step, some manufacturers process the raw materials through one process, and each process needs to be provided with a machine and manpower, so that the processing mode wastes manpower and has low efficiency; the consistency of manually placed products cannot be guaranteed, which may cause quality problems; in addition, there is the potential safety hazard in operating personnel frequently stretches into the die cavity with the hand and gets, put the product.

2. An improved segmented process, namely: the stretch forming is performed by continuous production, and the thread forming is made by adopting a single process. However, the tensile forming causes large internal stress of the product, so that intermediate annealing is needed to eliminate the internal stress and then thread forming is carried out. This in turn causes residual stress in the product after secondary machining (thread forming), often causing cracking of the workpiece during subsequent welding procedures, and the product after secondary machining is magnetic and can adsorb impurities. Meanwhile, after secondary processing, surface flaws such as 'indentation' and the like can appear on the surface of the workpiece.

According to the sectional processing concept, namely bright annealing treatment is performed midway (between stretching forming and thread forming), so that production is not continuous enough, semi-finished products in a factory are overstocked, on-site product states are many, management difficulty is high, and quality risk exists; and the product is processed after returning in the midway, so that the processing trace of the product appearance is thin, and the brightness of the whole appearance is uneven.

The process is increased during annealing, cleaning treatment is needed before annealing, cleaning is needed again after secondary processing, and the two times of cleaning are not environment-friendly enough and the cost is increased.

In addition, to the thread forming processing, some present manufacturers are spinning thread, and this kind of mode can lead to stress concentration easy cracking, and clamping location uniformity is not accurate enough, gets that the piece needs the manual work to be twisted out, has the quality risk, and complex operation.

Therefore, how to effectively improve the conventional product habit process, further promote the improvement of production efficiency and product quality, and reduce production cost becomes a technical problem to be solved urgently.

Disclosure of Invention

Aiming at the technical problems, the invention provides the machining process of the oil tank metal flow guide nozzle, which can continuously perform metal material shaping machining on the premise of ensuring the quality, has strong process continuity, reduces the process cost, saves the manpower and improves the production efficiency.

The technical scheme of the invention is as follows: comprises a blanking process for preparing a round sheet blank and also comprises the following processes,

1) At least a secondary stretching step, stretching the circular sheet blank into a conical cylinder-shaped flow guide nozzle blank shape;

2) Cutting off the flash, namely cutting off the redundant edge of the outer edge of the conical tubular diversion nozzle blank to obtain a conical tubular diversion nozzle blank;

3) Performing synchronous inner surface bulging and outer surface buckling operation on the conical tubular diversion nozzle blank by adopting a diversion nozzle outer wall thread forming die unit to enable the conical tubular diversion nozzle blank to complete thread forming under the condition of surface contact, thereby obtaining a diversion nozzle blank with threads;

4) The nozzle hole processing procedure is to punch a hole and flange the guide nozzle blank;

5) Shaping, finishing metal shaping processing;

6) And finally, carrying out bright annealing treatment, and finishing.

The steps 1 to 5) are sequentially carried out continuous operation on the same press machine; the press machine is sequentially and continuously provided with a workbench and a sliding block: the device comprises at least two groups of drawing die units, a flash cutting die unit, at least one group of guide nozzle outer wall thread forming die unit, a punching die unit, a flanging die unit and a shaping die unit;

and synchronous mechanical arms are respectively arranged on the front side and the rear side of the workbench of the press machine corresponding to the at least two groups of drawing die units, the trimming die unit, the at least one group of guide nozzle outer wall thread forming die unit, the punching die unit, the flanging die unit and the shaping die unit.

The at least two groups of drawing die units, the trimming die unit, the at least one group of guide nozzle outer wall thread forming die unit, the punching die unit, the flanging die unit and the shaping die unit are sequentially arranged on the workbench at equal intervals;

the front side and the rear side of the workbench of the press are respectively provided with a forward moving beam and a backward moving beam, and the synchronous manipulator is arranged on the forward moving beam and the backward moving beam at equal intervals to realize the correspondence with the die units.

The water conservancy diversion mouth outer wall thread forming die unit include: the device comprises an upper die assembly and a lower die assembly, wherein the lower die assembly is fixedly connected to the surface of a workbench and is characterized by also comprising an expansion mechanism;

the upper die assembly comprises an upper die base plate, an upper die cushion block, a cushion block bottom plate, a thimble mounting plate, a plurality of thimbles, a limiting guide plate, a suspension connecting ring, a supporting plate and a plurality of centripetal sliding lobes;

the upper die cushion block and the cushion block bottom plate are sequentially and fixedly connected to the bottom surface of the upper die substrate;

a plurality of thimble mounting holes are uniformly formed in the thimble mounting plate, a plurality of thimbles are arranged in the thimble mounting holes, the thimble mounting sealing plate is fixedly connected to the top surface of the thimble mounting plate, and an assembly formed by the thimble mounting sealing plate, the thimble mounting plate and the thimbles is fixedly connected to the bottom surface of the cushion block bottom plate; the lower end of the thimble is provided with a wedge;

a plurality of sliding vane guide grooves are uniformly distributed on the supporting plate, and the centripetal sliding vanes are movably arranged in the sliding vane guide grooves; the surface of the centripetal sliding valve in the centripetal direction is provided with a tooth forming surface, the surface of the centripetal sliding valve in the outward direction is provided with a sliding valve wedge groove, and a wedge at the lower end of the thimble is matched with the sliding valve wedge groove; the suspension connecting ring and the limiting guide plate are sequentially fixed on the upper surface of the supporting plate, so that the limiting guide plate, the suspension connecting ring, the supporting plate and the plurality of sliding vanes form an integral component, the integral component is connected to the cushion block bottom plate through the suspension rod assembly, and a stroke gap H is reserved between the top surface of the limiting guide plate and the thimble mounting plate;

the lower die assembly comprises a material supporting plate assembly, a lower die panel, a lower die body, a lower die core positioning plate, a lower die core seat plate, a lower die structural plate I, a lower die structural plate II, a lower die structural plate III and a lower die bottom plate,

the expansion mechanism comprises a driving cylinder, a sliding driving block, a lifting driving body, a lower mold core, a pair of expansion petals I and a pair of expansion petals II;

the material supporting plate assembly comprises a material supporting plate, a material supporting plate ejector rod, a reset plate and an elastic piece, a through hole is formed in the workbench, the reset plate is arranged on the bottom surface of the lower die base plate and located in the through hole, an elastic body is fixedly arranged below the workbench, and the elastic body supports against the reset plate; the supporting plate ejector rod penetrates through the lower die core positioning plate, the lower die core base plate, the first lower die structure plate, the second lower die structure plate, the third lower die structure plate and the lower die base plate, the top end of the material supporting plate ejector rod is fixedly connected with the bottom surface of the material supporting plate, and the bottom end of the material supporting plate ejector rod is fixedly connected with the top surface of the reset plate;

the top surface of the lower die body is fixedly connected with the lower die panel, the bottom surface of the lower die body is sequentially and fixedly connected with a lower die structure plate II, a lower die structure plate III and a lower die bottom plate, the lower die structure plate I is arranged in the lower die body and is fixedly connected with the top surface of the lower die structure plate II, a lower die core base plate and a lower die core positioning plate are also fixedly connected to the top surface of the lower die structure plate from bottom to top, an accommodating groove is formed in the lower die core positioning plate, and the lower die core is arranged in the accommodating groove and is fixedly connected to the lower die core base plate after penetrating through the accommodating groove;

the lower mold core is provided with a columnar body and a pair of rib plates arranged at the bottom of the columnar body, a pair of inclined expansion valve first mounting surfaces are arranged in the direction of the columnar body facing the rib plates, an inner mold jacking block is movably connected to the top surface of the columnar body through a pin and an elastic piece, the pair of expansion valves are provided with inclined surfaces matched with the inclination of the inclined expansion valve first mounting surfaces, the bottoms of the pair of expansion valves are respectively provided with a resetting device of the expansion valve first, the other two side surfaces of the columnar body are respectively provided with a tongue insertion guide groove from the bottom surface, the lifting driving body is U-shaped to form a pair of insertion tongues, the tops of the insertion tongues are provided with conical surfaces, and the lifting driving body extends into the tongue insertion guide grooves;

the two sides of the insert tongue are respectively provided with a convex block, the convex blocks are fixedly arranged on the lower mold core positioning plate, the second expansion flap is arranged between the convex blocks and the insert tongue, and a return spring is arranged between the second expansion flap and the convex blocks;

the lower die structure plate II is provided with a sliding groove, the sliding driving block is arranged in the sliding groove and is connected with the driving cylinder arranged outside, the top surface of the sliding driving block is provided with a chute, and the lifting block is arranged between the chute and the lifting driving body.

The upper die assembly is further provided with a guide pillar, and the lower die assembly is provided with a guide pillar hole.

The resetting device of the first expansion valve comprises a top section, a middle section and a bottom end, wherein the top end is a rectangular rod, the middle section is a straight rod, and the bottom end is a compression spring; the resetting device of the first expansion valve is obliquely arranged and penetrates through the lower mold core, the lower mold core positioning plate, the lower mold core seat plate, the first lower mold structure plate, the second lower mold structure plate and the third lower mold structure plate, and the bottom end of the resetting device is supported and arranged on the lower mold bottom plate.

The limiting guide plate is provided with a pair of guide positioning lugs, and the lower die panel is provided with a pair of guide positioning grooves.

Go up the mould subassembly and still seted up ejector pin subassembly through the ejector pin subassembly runs through in the ejector pin subassembly through hole and is provided with the material pressing rod subassembly, the material pressing rod subassembly is including pressing material pole and cylinder, press the material pole bottom to be used for propping the top surface of location work piece.

When the circular sheet blank is processed into the deep cylindrical workpiece on one press machine, the continuous plastic deformation is carried out, and the cracking of the circular sheet blank can be avoided. After the overall molding, the aluminum alloy is subjected to bright annealing treatment. Therefore, the complex working procedures generated by intermediate annealing are saved, and the final complete bright state of the finished product is ensured.

In the technical scheme of the invention, compared with the prior art, firstly, a continuous station is arranged on a press machine for carrying out automatic continuous plate forming processing, and secondly, in a key thread forming process, a thread forming die unit on the outer wall of the flow guide nozzle is adopted to carry out synchronous inner surface expanding and outer surface buckling operation on a conical flow guide nozzle blank, so that the conical flow guide nozzle blank is subjected to thread forming under the condition of surface contact, and even if a semi-finished workpiece has certain internal stress and crystal phase defects under the working condition of the shaping processing operation of a fully-contacted metal plate, the workpiece can not crack (certainly, defective products with a small proportion can not be eliminated). The processing technology of the invention has high production efficiency, can perform heat treatment after finishing the shaping of the finished product through continuous processing operation, saves working procedures and greatly improves the working efficiency. Meanwhile, because the heat treatment is carried out after the heat treatment, no plate shaping process exists after the heat treatment, the appearance of a finished product is attractive and uniform, and the internal quality is improved.

Drawings

FIG. 1 is a schematic structural view of a special apparatus for carrying out the process of the present invention,

figure 2 is a left side view of figure 1,

figure 3 is a schematic perspective view of the finished article of the process of the present invention,

figure 4 is a schematic diagram of the structure of the synchronous manipulator in the special equipment of the invention,

figure 5 is a right side view of figure 4,

figure 6 is a schematic view of the operation of the invention with the circulation of the finished blanks through the die units on a special apparatus,

figure 7 is a schematic diagram of the blanking process of the present invention,

figure 8 is a schematic view of a primary stretching process in an embodiment of the present invention,

FIG. 9 is a schematic view of a secondary stretching process in an embodiment of the present invention,

figure 10 is a schematic view of a triple drawing process in an embodiment of the present invention,

figure 11 is a schematic view of a four-pass drawing process in an embodiment of the present invention,

figure 12 is a schematic illustration of five stretching steps in an embodiment of the present invention,

figure 13 is a schematic illustration of six drawing steps in an embodiment of the present invention,

FIG. 14 is a schematic view of a trimming process in an embodiment of the present invention,

figure 15 is a perspective external view of a flow guide nozzle outer wall thread forming die unit according to the present invention,

figure 16 is a structural schematic view of a flow guide nozzle outer wall thread forming die unit in the invention,

figure 17 isbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of figure 16,

figure 18 is a cross-sectional view B-B of figure 17,

figure 19 is a first perspective exploded view of the upper die assembly of the nozzle outer wall thread forming die unit,

figure 20 is a second perspective exploded view of the upper die assembly of the nozzle outer wall thread forming die unit,

figure 21 is a perspective view of a centripetal slide in the upper die assembly,

figure 22 is a schematic view of the assembled relationship of the centripetal slide and the blade in the upper die assembly,

figure 23 is a perspective view of a thimble in the upper die assembly,

FIG. 24 is a schematic view showing the assembling relationship of the thimble, the centripetal slide vane and the support plate in the upper mold assembly,

figure 25 is a perspective view of a curb guide plate of the upper die assembly,

figure 26 is a perspective exploded view of the lower die assembly of the nozzle outer wall thread forming die unit,

figure 27 is a perspective exploded view of the lower die assembly of the nozzle outer wall thread forming die unit,

figure 28 is a perspective view of the lower die and the expanding mechanism in the nozzle outer wall thread forming die unit,

figure 29 is a first three-dimensional exploded view of the expanding mechanism in the nozzle outer wall thread forming die unit,

figure 30 is a second three-dimensional exploded view of the expanding mechanism in the outer wall thread forming die unit of the flow guide nozzle,

fig. 31 is a perspective view of the lower core.

In the figure:

1 is a press, 11 is a slide block, 12 is a workbench (original 6), 121 is an elastic part, 2 is a forward moving beam, 3 is a backward moving beam, 4 is a synchronous manipulator, and 41 is a V-shaped clamping block; 5 is a workpiece, 50 is a workpiece circular blank, 51 is a thread, 52 is a nozzle hole,

i is a material discharging station, II is a stretching station, III is a trimming station, IV is an outer wall thread forming station, V is a punching nozzle hole station, VI is a nozzle hole primary flanging station, VII is a nozzle hole secondary flanging station, and VIII is a shaping station;

IV 1 is an upper die assembly, IV 11 is an upper die base plate, IV 111 is a mandril assembly through hole, IV 12 is an upper die cushion block, IV 121 is a cushion block suspension piece arranging hole, IV 13 is a cushion block bottom plate, IV 131 is a cushion block bottom plate suspension piece arranging hole, IV 14 is a centripetal forming mechanism, IV 141 is a thimble mounting sealing plate, IV 142 is a thimble mounting plate, IV 143 is a thimble, IV 1431 is a dovetail wedge, IV 144 is a limit guide plate, IV 1441 is a guide positioning lug, IV 1442 is a thimble guide groove, IV 145 is a centripetal slide valve, IV 1451 is a slide valve wedge groove, IV 1452 is a slide valve radial movement guide block, IV 1453 is a thread forming surface, IV 146 is a suspension connecting ring, IV 147 is a cushion ring, IV 148 is a supporting plate, IV 1481 is a slide valve guide groove,

IV 2 is a lower die component, IV 21 is a retainer plate, IV 211 is a retainer plate ejector rod, IV 212 is a reset plate, IV 22 is a lower die panel, IV 221 is a guide positioning groove, IV 222 is a guide column hole, IV 23 is a lower die body, IV 24 is a lower die core positioning plate, IV 241 is a convex block, IV 242 is an accommodating groove, IV 25 is a lower die core seat plate, IV 26 is a lower die structure plate I, IV 27 is a lower die structure plate II, IV 28 is a lower die structure plate III, IV 29 is a lower die bottom plate,

IV 3 is a swage bar assembly, IV 31 is a swage bar,

IV 4 is an expanding mechanism, IV 41 is a driving cylinder, IV 42 is a sliding driving block, IV 43 is a lifting block, IV 44 is a lifting driving body, IV 441 is a plug tongue, IV 45 is a lower die core, IV 451 is an inner die top block, IV 452 is an expanding valve one mounting surface, IV 453 is a plug tongue guide groove, IV 454 is a lower die core top surface, IV 46 is an expanding valve one, IV 461 is a resetting device of the expanding valve one, IV 47 is an expanding valve two, IV 471 is an expanding valve two resetting spring, and IV 472 is an inner conical surface;

h is a stroke clearance for realizing the centripetal motion of the upper die;

the solid arrows in fig. 6 indicate the direction of movement of the forward and rearward moving beams;

in fig. 29 and 30, the hollow arrows indicate the expanding movement direction of the second expanding flap, the line arrows indicate the expanding movement direction of the first expanding flap, and the two-dot chain line arrows indicate the movement direction of the resetting device of the first expanding flap.

Detailed Description

The invention is further described below with reference to figures 1-31,

the diversion nozzle of the workpiece 5 to be processed is shown in fig. 3, the whole workpiece 5 is in a cone cylinder shape, the conical top surface of the top end is provided with a nozzle hole 52, and a concave thread shape needs to be processed on the cylinder body at the middle lower part to be matched with the screwing of the oil tank cover. The difficulty of the structural workpiece processing is that after deep cylindrical drawing, annealing treatment is needed, and then a threaded structure on a cylinder body is processed, otherwise, the workpiece is cracked in a large proportion. In order to overcome the defect of the prior art, the invention provides the following continuous processing and shaping process, and the annealing treatment is carried out afterwards so as to improve the consistency of the appearance of the finished product and avoid secondary internal stress of the finished product caused by subsequent reshaping after annealing.

The process comprises a blanking process, namely, arranging blanking equipment in front of a machine table to prepare circular sheet blanks, then sending the circular sheet blanks into a discharge station I (shown in figure 7) on a press machine 1, and then carrying out continuous processing according to the following processes,

1) At least a secondary stretching process, the synchronous mechanical arm 4 sends the circular sheet blank 50 into a stretching station II, and the circular sheet blank 50 is stretched into a conical cylinder-shaped flow guide nozzle blank shape; in the scheme, as shown in fig. 8-13, a six-time stretching process is adopted, and a plurality of stretching dies with gradually increased deformation are adopted to realize the process, so that the flat-plate-shaped circular sheet blank 50 is gradually stretched into an eccentric deep cone shape;

2) The synchronous manipulator 4 sends the semi-finished product in the shape of the eccentric deep cone into a flash cutting station III for carrying out a flash cutting process, and as shown in figure 14, the redundant edge of the outer edge of the blank shape of the cone-shaped flow guide nozzle is cut off to obtain a cone-shaped flow guide nozzle blank;

3) The conical barrel-shaped diversion nozzle blank is sent into an outer wall thread forming station IV, an inner surface and outer surface synchronous thread forming procedure is carried out at least once, and synchronous inner surface bulging and outer surface buckling operations are carried out on the conical barrel-shaped diversion nozzle blank by adopting a diversion nozzle outer wall thread forming die unit, so that the conical barrel-shaped diversion nozzle blank is subjected to thread forming under the condition of surface contact, and a diversion nozzle blank with threads is obtained;

4) A nozzle hole processing procedure, namely, sending the diversion nozzle blank into a nozzle hole punching station V, a nozzle hole primary flanging station VI and a nozzle hole secondary flanging station VII for punching and hole edge flanging;

5) Then sending the punched and flanged workpiece to a shaping station VIII to finish metal shaping processing; at this time, the formed workpiece has a large internal stress, and the surface has defects such as surface traces after punching and drawing;

6) And finally, performing bright annealing treatment to eliminate the internal stress of the workpiece 5, and finishing the process with bright surface and uniform strength.

Steps 1 to 5) are sequentially carried out continuous operation on the same press machine 1; the worktable 12 and the slide block 11 of the press 1 are sequentially provided with: the device comprises at least two groups of drawing die units, a flash cutting die unit, at least one group of guide nozzle outer wall thread forming die unit, a punching die unit, a flanging die unit and a shaping die unit; namely a material discharging station I, a stretching station II, a trimming station III, an outer wall thread forming station IV, a punching nozzle hole station V, a nozzle hole primary flanging station VI, a nozzle hole secondary flanging station VII and a shaping station VIII in the figures 1 and 6.

Synchronous manipulators 4 are respectively arranged on the front side and the rear side of a workbench 12 of the press machine 1 corresponding to at least two groups of drawing die units, flash cutting die units, at least one group of guide nozzle outer wall thread forming die units, punching die units, flanging die units and shaping die units. At least two groups of drawing die units, trimming die units, at least one group of guide nozzle outer wall thread forming die units, punching die units, flanging die units and shaping die units are sequentially arranged on the workbench 12 at equal intervals;

the front side and the rear side of a workbench 12 of the press are respectively provided with a forward moving beam 2 and a backward moving beam 3, and a plurality of synchronous manipulators 4 are equidistantly arranged on the forward moving beam 2 and the backward moving beam 3 to realize the correspondence with each mould unit. As shown in fig. 6, the forward moving beam 2 and the backward moving beam 3 are driven by the reciprocating mechanism to reciprocate, and the robot 4 thereon is driven to move synchronously. The forward moving beam 2 and the backward moving beam 3 move in the X direction repeatedly by reciprocating motion, and the manipulator 4 takes and puts the workpiece 5 in the Y direction.

After the press machine slide block 11 rises, the manipulator 4 clamps and takes the semi-finished blank on the corresponding die, the forward moving beam 2 and the backward moving beam 3 are translated to the next die station by the driving mechanism, the semi-finished blank is placed, and the resetting is carried out again to wait for the next pressing operation of the slide block 11. Since the robot 4 uses the V-shaped clamping blocks 41 to clamp deformed workpieces with different diameters and the reciprocating motion of the forward moving beam 2 and the backward moving beam 3 are conventional technical means in the field, detailed description thereof is omitted.

The die unit for forming the thread on the outer wall of the flow guide nozzle is described by focusing on the accompanying drawings 15-31, and comprises an upper die assembly IV 1 and a lower die assembly IV 2, wherein the lower die assembly IV 2 is fixedly connected to the surface of a workbench 12 of a press machine device, and the upper die assembly IV 1 is connected to a slide block 12 of the press machine;

the invention relates to a thread forming die unit for the outer wall of a flow guide nozzle, which is characterized in that: the device also comprises an expanding mechanism IV 4 and the specific structure of an upper die assembly IV 1 and a lower die assembly IV 2.

The upper die assembly IV 1 comprises an upper die base plate IV 11, an upper die cushion block IV 12, a cushion block bottom plate IV 13, a thimble mounting sealing plate IV 141, a thimble mounting plate IV 142, a plurality of thimbles IV 143, a limiting guide plate IV 144, a suspension connecting ring IV 146, a supporting plate IV 148 and a plurality of centripetal sliding lobes IV 145; it should be noted that: as shown in fig. 18 and 19, the thimble mounting closing plate iv 141, the thimble mounting plate iv 142, the thimble iv 143, the limit guide plate iv 144, the centripetal slide valve iv 145, the suspension connection ring iv 146, the backing ring iv 147 and the support plate iv 148 constitute a centripetal forming mechanism iv 14 in the upper die assembly iv 1, and the centripetal forming mechanism iv 14 performs a task of shaping the outer surface thread of the workpiece 5 in the present invention.

The concrete structure is as follows:

the upper die cushion block IV 12 and the cushion block bottom plate IV 13 are fixedly connected to the bottom surface of the upper die base plate IV 11 in sequence;

a plurality of thimble mounting holes are uniformly formed in the thimble mounting plate IV 142, a plurality of thimbles IV 143 are arranged in the thimble mounting holes, and a thimble mounting sealing plate IV 141 is fixedly connected to the top surface of the thimble mounting plate IV 142 and used for limiting and fixing the top end surface of the thimble IV 143. An assembly composed of the thimble mounting sealing plate IV 141, the thimble mounting plate IV 142 and the thimbles IV 143 is fixedly connected to the bottom surface of the cushion block bottom plate IV 13; the lower end of the thimble IV 143 is provided with an outward-facing wedge, and the specific structure is a dovetail wedge IV 1431;

a plurality of sliding vane guide grooves IV 1481 are uniformly distributed on the supporting plate IV 148, and the centripetal sliding vanes IV 145 are movably arranged in the sliding vane guide grooves IV 1481; the centripetal slide valve IV 145 is provided with a tooth forming surface IV 1453 on the centripetal direction surface, a slide valve wedge groove IV 1451 on the outward direction surface, and a slide valve radial movement guide block IV 1452 (for guiding in a slide valve guide groove IV 1481) on the bottom surface of the centripetal slide valve IV 145. The wedge at the lower end of the thimble IV 143 is matched with the slide valve wedge groove IV 1451; when the thimble IV 143 moves downwards, the centripetal slide valve IV 145 can be driven to do centripetal movement.

The suspension connecting ring IV 146 and the limiting guide plate IV 144 are sequentially fixed on the upper surface of the supporting plate IV 148, so that the limiting guide plate IV 144, the suspension connecting ring IV 146, the supporting plate IV 148 and the sliding vanes IV 145 form an integral component, the integral component is connected to the cushion block base plate IV 13 through a suspension rod assembly (as shown in FIG. 17, the suspension connecting ring IV 142, the ejector pin mounting sealing plate IV 141 penetrate through the ejector pin mounting plate IV 142 and the ejector pin mounting sealing plate IV 141, a stroke gap H is reserved between the top surface of the limiting guide plate IV 144 and the bottom surface of the ejector pin mounting plate IV 142, when an upper die does not descend, the integral component descends synchronously, when resistance (such as a lower die supporting plate workpiece) exists, the integral component starts to operate mutually, meanwhile, upper components (an upper die base plate IV 11, an upper die cushion block IV 12, a cushion block base plate IV 13, the ejector pin mounting sealing plate IV 141, the ejector pin mounting plate IV 142 and the ejector pin mounting plate IV 143) of the upper die assembly IV 1 continue to descend, and lower components (the limiting guide plate IV 144, the suspension connecting ring IV supporting plate 148 and the dovetail sliding vanes IV 145) are limited by a lower die assembly, the upper component drives the lower die assembly to complete the diameter-reducing movement within the range of the stroke gap H, the diameter-reducing guide plate IV, the sliding vanes IV 145 is limited by the lower component, the sliding vanes IV 145, the sliding vanes IV guide plate IV 145 is limited sliding vanes 145, and the ejector pin guiding groove 145 is limited by a centripetal guide groove 145 in the centripetal guide groove 145, and the centripetal guide groove 145 is limited by the centripetal guide groove 145.

In order to realize the suspension structure, a cushion block suspension piece placement hole iv 121 needs to be formed in an upper die cushion block iv 12, a cushion block bottom plate suspension piece placement hole iv 131 with a smaller size needs to be formed in a cushion block bottom plate iv 13, and connection holes need to be formed in related parts.

It should be noted that, in view of the fact that the support plate IV 148 bears a large expanding force during operation, the invention provides the backing ring IV 147 outside the support plate IV 148 to increase the mechanical strength of the backing plate IV 148.

The lower die component IV 2 comprises a material supporting plate component, a lower die panel IV 22, a lower die body IV 23, a lower die core positioning plate IV 24, a lower die core seat plate IV 25, a lower die structure plate IV 26, a lower die structure plate II IV 27, a lower die structure plate III IV 28 and a lower die bottom plate IV 29,

the expansion mechanism IV 4 comprises a driving cylinder IV 41, a sliding driving block IV 42, a lifting block IV 43, a lifting driving body IV 44, a lower mold core IV 45, a pair of expansion petals IV 46 and a pair of expansion petals IV 47;

the retainer plate assembly comprises a retainer plate IV 21, a retainer plate ejector rod IV 211, a reset plate IV 212 and an elastic part 121, a through hole is formed in the workbench 12, the reset plate IV 212 is arranged on the bottom surface of the lower die base plate IV 29 and is positioned in the through hole, an elastic body 121 is fixedly arranged below the workbench 12, and the elastic body 121 supports the reset plate IV 212; the retainer plate ejector rod IV 211 penetrates through the lower die core positioning plate IV 24, the lower die core seat plate IV 25, the lower die structure plate IV 26, the lower die structure plate II IV 27, the lower die structure plate III IV 28 and the lower die bottom plate IV 29, and the top end of the retainer plate ejector rod IV 211 is fixedly connected with the bottom surface of the retainer plate IV 21 and the bottom end of the retainer plate ejector rod IV 211 is fixedly connected with the top surface of the reset plate IV 212. The retainer plate IV 21 is used as a movable part for bearing the workpiece 5, and along with the pressing of the upper die assembly IV 1 on the workpiece 5, the backing plate IV 148 in the upper die assembly IV 1 simultaneously contacts the top surface of the retainer plate IV 21 to press down the retainer plate IV 21 until the guide positioning lugs IV 1441 of the limiting guide plate IV 144 are embedded into the guide positioning grooves IV 221 of the lower die panel IV 22, so that the stroke in the vertical direction is completed. After the stroke in the vertical direction is completed, the retainer plate IV 21 is reset under the action of the elastic part 121, the reset plate IV 212 and the retainer plate ejector rod IV 211; in view of the fact that the through arrangement of the parts of the lower die assembly IV 2 belongs to the conventional technical means in the field, the channel structure of the material supporting plate ejector rod IV 211 is not described in detail in the present case.

The top surface of the lower die body IV 23 is fixedly connected with a lower die panel IV 22, the bottom surface of the lower die body IV 23 is sequentially and fixedly connected with a lower die structure plate II IV 27, a lower die structure plate III IV 28 and a lower die bottom plate IV 29, a lower die structure plate IV 26 is arranged in the lower die body IV 23 and is fixedly connected to the top surface of the lower die structure plate II IV 27, a lower die core base plate IV 25 and a lower die core positioning plate IV 26 are further fixedly connected to the top surface of the lower die structure plate IV 26 from bottom to top, an accommodating groove IV 242 is formed in the lower die core positioning plate IV 26, and a lower die core IV 45 is arranged in the accommodating groove IV 242 and is fixedly connected to the lower die core IV base plate 25 after penetrating through the accommodating groove IV 242;

the lower mold core IV 45 is provided with a columnar body and a pair of ribbed plates arranged at the bottom of the columnar body, a pair of inclined expanding petal one mounting surfaces IV 452 is arranged in the direction of the columnar body facing the ribbed plates, an inner mold top block IV 451 is movably connected to the top surface of the columnar body through a pin and an elastic part, a pair of expanding petal one IV 46 is provided with a slope adaptive to the slope of the inclined expanding petal one mounting surfaces IV 452, the bottoms of the pair of expanding petal one IV 46 are respectively provided with a resetting device IV 461 of the expanding petal one, and after the inner top surface of the upper mold lower pressing driving workpiece 5 contacts the inner mold top block IV 451, the inner mold top block IV 451 downwards drives the pair of expanding petal one IV 46 to descend along the slope, and diameter expansion is realized at the same time. This action completes the local support, support and shaping of the inner surface of the workpiece 5.

The other two side surfaces of the columnar body are respectively provided with a tongue insertion guide groove IV 453 from the bottom surface, the lifting driving body IV 44 is U-shaped to form a pair of tongue insertion IV 441, the top of the tongue insertion IV 441 is provided with a conical surface, and the lifting driving body IV 44 extends into the tongue insertion guide groove IV 453;

the two sides of the insert tongue IV 441 are respectively provided with a convex block IV 241, the convex block IV 241 is fixedly arranged on the lower die core positioning plate IV 24, an expanding valve II IV 47 is arranged between the convex block IV 241 and the insert tongue IV 441, and an expanding valve II return spring IV 471 is arranged between the expanding valve II IV 47 and the convex block IV 241; this action completes the supporting, supporting and shaping of another part of the inner surface of the workpiece 5.

A sliding groove is formed in the second lower die structure plate IV 27, a sliding driving block IV 42 is arranged in the sliding groove, the sliding driving block IV 42 is connected with a driving cylinder IV 41 arranged outside, a chute is formed in the top surface of the sliding driving block IV 42, and a lifting block IV 43 is arranged between the chute and a lifting driving body IV 44. Since it is a conventional technical measure in the art to convert a planar motion into a vertical motion, the detailed description thereof is omitted here.

In order to ensure the running precision of the upper die and the lower die, the upper die assembly IV 1 is further provided with a guide post IV 15, and the lower die assembly IV 2 is provided with a guide post hole IV 222.

The resetting device IV 461 of the first expanding valve comprises a top section, a middle section and a bottom end, wherein the top end is a rectangular rod, the middle section is a straight rod, and the bottom end is a compression spring; the resetting device IV 461 of the first expanding valve is obliquely arranged and penetrates through the lower mold core IV 45, the lower mold core positioning plate IV 24, the lower mold core seat plate IV 25, the first lower mold structure plate IV 26, the second lower mold structure plate IV 27 and the third lower mold structure plate IV 28, and the bottom end of the resetting device is supported and arranged on the lower mold bottom plate IV 29. And ensuring that the pair of expansion valves I IV 46 are effectively reset after finishing one diameter expansion action.

A pair of guide positioning lugs IV 1441 is arranged on the limit guide plate IV 144, and a pair of guide positioning grooves IV 221 is arranged on the lower die panel IV 22. The structure is mainly used for positioning a lower component of the upper die when the upper die descends.

The upper die assembly IV 1 is further provided with a mandril assembly through hole IV 111, a pressing rod assembly IV 3 penetrates through the mandril assembly through hole IV 111, the pressing rod assembly IV 3 comprises a pressing rod IV 31 and a cylinder, and the bottom end of the pressing rod IV 31 is used for supporting and positioning the top surface of the workpiece 5. The air cylinder can be arranged at the upper part of the press, and drives the press rod IV 31 to follow in the working process, so that the pressing state of the top surface of the workpiece 5 is kept.

The die disclosed by the invention acts in two steps in the process of forming the thread, after a workpiece is placed on a lower die retainer plate in the first step, an upper die assembly descends to flexibly push the workpiece to descend until the inner top surface of the workpiece contacts an inner die ejector block; and after the second step reaches the pushing stroke, starting to perform the threading stroke, namely, the upper die continues to move downwards and the expanding mechanism moves simultaneously, and the threading operation is completed through three actions: firstly, the centripetal sliding vane of the upper die retracts inwards to shape the outer surface of a workpiece; secondly, the tensioning mechanism acts to drive the second expanding valve to perform expanding motion under the condition of unchanged height, so that local shaping and supporting on the inner surface of the workpiece are realized; and thirdly, when the workpiece is pressed down, the inner die top block on the top surface of the lower die core moves downwards, and simultaneously drives the expansion valve to move downwards and expand the diameter, so that the local shaping and supporting of the inner surface of the workpiece are realized. And in the second step and the third step, the first tensioning flap and the second tensioning flap are combined to support the complete inner surface of the workpiece. Under the working condition of the 'full-contact' metal plate shaping processing operation, even if a semi-finished workpiece has certain internal stress and crystal phase defects, the workpiece cannot crack (certainly, a small proportion of defective products cannot be eliminated).

The oil filling nozzle outer wall thread forming die is ingenious in conception and high in production efficiency. The heat treatment can be carried out after the molding of the finished product is finished through continuous processing operation, so that the working procedures are saved, and the working efficiency is greatly improved.

Claims

1. A technology for machining the metallic guide nozzle of oil tank includes blanking to obtain circular plate blank, preparing the metallic guide nozzle of oil tank,

2) Cutting off the flash, namely cutting off the redundant edge of the outer edge of the conical flow guide nozzle blank to obtain a conical flow guide nozzle blank;

5) Shaping, finishing metal shaping processing;

6) Finally, carrying out bright annealing treatment;

the utility model is characterized in that, water conservancy diversion mouth outer wall screw thread forming die unit include: the lower die assembly is fixedly connected to the surface of the workbench and also comprises an expansion mechanism;

a plurality of thimble mounting holes are uniformly formed in the thimble mounting plate, a plurality of thimbles are arranged in the thimble mounting holes, the thimble mounting sealing plate is fixedly connected to the top surface of the thimble mounting plate, and an assembly formed by the thimble mounting sealing plate, the thimble mounting plate and the thimbles is fixedly connected to the bottom surface of the cushion block bottom plate; the lower end of the thimble is provided with an inclined wedge;

a plurality of sliding vane guide grooves are uniformly distributed on the supporting plate, and the centripetal sliding vanes are movably arranged in the sliding vane guide grooves; the surface of the centripetal sliding valve in the centripetal direction is provided with a tooth forming surface, the surface of the centripetal sliding valve in the outward direction is provided with a sliding valve wedge groove, and a wedge at the lower end of the thimble is matched with the sliding valve wedge groove; the suspension connecting ring and the limiting guide plate are sequentially fixed on the upper surface of the supporting plate, so that the limiting guide plate, the suspension connecting ring, the supporting plate and the plurality of slide vanes form an integral component, the integral component is connected to the cushion block bottom plate through the suspension rod assembly, and a stroke gap H is reserved between the top surface of the limiting guide plate and the thimble mounting plate;

the material supporting plate assembly comprises a material supporting plate, a material supporting plate ejector rod, a reset plate and an elastic piece, a through hole is formed in the workbench, the reset plate is arranged on the bottom surface of the lower die base plate and located in the through hole, an elastic body is fixedly arranged below the workbench, and the elastic body supports against the reset plate; the supporting plate ejector rod penetrates through the lower die core positioning plate, the lower die core base plate, the first lower die structural plate, the second lower die structural plate, the third lower die structural plate and the lower die bottom plate, the top end of the supporting plate ejector rod is fixedly connected with the bottom surface of the supporting plate, and the bottom end of the supporting plate ejector rod is fixedly connected with the top surface of the reset plate;

2. The machining process of the metal flow guide nozzle of the oil tank according to claim 1, wherein the steps 1 to 5) are performed in sequence on the same press machine for continuous operation; the press machine is sequentially and continuously provided with a workbench and a sliding block: the device comprises at least two groups of drawing die units, a flash cutting die unit, at least one group of guide nozzle outer wall thread forming die unit, a punching die unit, a flanging die unit and a shaping die unit;

3. The machining process of the metal flow guide nozzle of the oil tank as claimed in claim 2, wherein the at least two sets of drawing die units, the trimming die unit, the at least one set of flow guide nozzle outer wall thread forming die unit, the punching die unit, the flanging die unit and the shaping die unit are sequentially arranged on the workbench at equal intervals;

4. The process for manufacturing a fuel tank metal nozzle according to claim 1, wherein the upper mold assembly further comprises a guide post, and the lower mold assembly comprises a guide post hole.

5. The process for machining the metal flow guide nozzle of the oil tank as claimed in claim 1, wherein the resetting device of the first expansion flap comprises a top section, a middle section and a bottom end, wherein the top end is a rectangular rod, the middle section is a straight rod, and the bottom end is a compression spring; the resetting device of the first expansion valve is obliquely arranged and penetrates through the lower mold core, the lower mold core positioning plate, the lower mold core seat plate, the first lower mold structure plate, the second lower mold structure plate and the third lower mold structure plate, and the bottom end of the resetting device is supported and arranged on the lower mold bottom plate.

6. The process for manufacturing a fuel tank metal nozzle according to claim 1, wherein a pair of guide positioning lugs are provided on the limiting guide plate, and a pair of guide positioning grooves are provided on the lower die plate.

7. The machining process of the oil tank metal flow guide nozzle according to claim 1, wherein the upper die assembly is further provided with a mandril assembly through hole, a material pressing rod assembly penetrates through the mandril assembly through hole and comprises a material pressing rod and an air cylinder, and the bottom end of the material pressing rod is used for supporting and positioning the top surface of a workpiece.