CN114103236B - Upper three devices of powder forming die and adjusting method thereof - Google Patents

Abstract

The utility model relates to a powder forming equipment technical field specifically is a last three devices of powder forming mould and adjustment method thereof, including the center jar, a plurality of last auxiliary cylinder, a plurality of lower spacing gear, last punch holder, go up two punch holders, go up three punch holders, go up two punch pads, last punch pad, guide pillar and a plurality of adjusting unit, the center jar includes the cylinder body, the cylinder bottom, the piston rod, go up spacing oblique adjusting block and last spacing adjusting pad, piston rod lower part threaded connection has lower spacing adjusting nut, every adjusting unit all includes gear wheel and transmission regulating part, the gear wheel rotation of two adjusting unit is connected on the cylinder body, the gear wheel threaded connection of two other adjusting unit is last two punch pads and last punch pad on, this scheme can carry out effective adjustment to last three punch heads, go up two punch heads and last punch head's last spacing respectively, the problem that current powder forming mould's last three devices can not be adjusted.

Description

Upper three devices of powder forming die and adjusting method thereof

Technical Field

The application relates to the technical field of powder forming equipment, in particular to a three-feeding device of a powder forming die and an adjusting method thereof.

Background

Powder metallurgy forming is one of the basic processes in powder metallurgy production, with the aim of forming loose (metal, ceramic, or other material) powders into semi-finished products of predetermined geometry, size, density and strength by pressing them in a die, which is a device that presses the powders into a product of a certain fixed shape. The three devices on the existing powder forming die cannot be adjusted, and the product pressing and demolding are not facilitated.

Disclosure of Invention

The application aims to provide a three-feeding device of a powder forming die and an adjusting method thereof, so as to solve the problem that the three-feeding device of the existing powder forming die cannot be adjusted.

In order to achieve the above object, the basic scheme of the present application is as follows:

an upper three devices of a powder forming die comprises a central cylinder, a plurality of upper auxiliary cylinders, a plurality of lower limit gears, an upper first punch plate, an upper second punch plate, an upper three punch plate, an upper second punch plate, an upper first punch plate, a guide post and a plurality of adjusting units, wherein the central cylinder comprises a cylinder body, a cylinder bottom, a piston rod, an upper limit inclined adjusting block and an upper limit adjusting plate, the cylinder bottom is arranged at the top of the cylinder body, the upper limit inclined adjusting block and the upper limit adjusting plate are stacked between the cylinder bottom and the cylinder body, the abutting surfaces of the upper limit inclined adjusting block and the upper limit adjusting plate are mutually matched inclined surfaces, the upper limit inclined adjusting block is narrower than the upper limit adjusting plate, an adjusting screw is connected to the upper thread of the cylinder body, the end part of the adjusting screw is connected with the upper limit inclined adjusting block, the lower part of the piston rod is provided with a lower limit adjusting nut in a thread connection, the upper three punch plate, the upper second punch plate, the upper first punch plate and the upper first punch plate are sequentially connected to the upper die plate from top to bottom in a sliding manner, the upper die plate is fixed at the upper die bottom end of the upper die plate and the lower die plate is fixed at the upper end of the upper die bottom;

each adjusting unit comprises a large gear and a transmission adjusting piece, a plurality of transmission adjusting pieces are in transmission connection with the large gears, the large gears of two adjusting units are rotationally connected to the cylinder body, the large gears of the other two adjusting units are in threaded connection with the upper two punching base plates and the upper one punching base plate, the upper ends of the large gears on the upper two punching base plates are propped against the bottoms of the upper three punching die plates, and the upper ends of the large gears on the upper one punching base plate are propped against the bottoms of the upper two punching die plates;

the lower ends of the upper three stamping plates are fixedly provided with a plurality of upper one-plate limiting pads, and the lower ends of the upper one-plate limiting pads penetrate through the upper two stamping plates and are propped against a large gear on the upper stamping plate;

the upper auxiliary cylinders are fixed on the upper three die plates, the tops of the upper auxiliary cylinders are connected with screw rods in a threaded manner, the bottoms of the screw rods penetrate through the upper auxiliary cylinders to be propped against piston rods in the upper auxiliary cylinders, the lower limit gears are fixedly connected to the tops of the screw rods, the upper auxiliary cylinders comprise at least one upper two auxiliary cylinders and at least one upper auxiliary cylinder, the piston rods of the upper two auxiliary cylinders are fixed with the upper two die plates, the piston rods of the upper auxiliary cylinders are fixed with the upper one die plate, through holes for the piston rods of the upper two auxiliary cylinders and the upper auxiliary cylinder to penetrate through are formed in the upper three die plates, the through holes for the piston rods of the upper auxiliary cylinders to penetrate through are formed in the upper two die plates, the lower limit gears on the upper two auxiliary cylinders are meshed with the big gears below the cylinder body, and the lower limit gears of the upper auxiliary cylinders are meshed with the big gears above the cylinder body.

Further, the transmission regulating piece comprises a small shaft, a worm wheel, a small gear, a worm and a bearing seat, wherein two regulating brackets are further fixed on the cylinder body, the two regulating brackets are respectively positioned below the two large gears on the cylinder body, the small shaft in the regulating unit is respectively and rotatably connected to the two regulating brackets, the upper two stamping plates and the upper stamping plate, the worm wheel and the small gear are both fixed on the small shaft, the worm is connected with the bearing seat, the worm is meshed with the worm wheel, and the bearing seats in the regulating unit are respectively fixed on the two regulating brackets, the upper two stamping plates and the upper stamping plate.

Further, the plurality of upper auxiliary cylinders comprise two upper two auxiliary cylinders and two upper one auxiliary cylinders, the two upper two auxiliary cylinders and the two upper one auxiliary cylinders are uniformly distributed on the outer side of the cylinder body, the two upper two auxiliary cylinders are diagonally arranged, and the two upper one auxiliary cylinders are diagonally arranged.

A method for adjusting the upper three devices of a powder forming die, using the upper three devices of a powder forming die according to any one of claims 2 or 3, comprising the steps of:

s01: upper limit adjustment of the central cylinder: the adjusting screw connected with the upper limit inclined adjusting block is rotated, and the adjusting screw is in threaded connection with the cylinder body, so that the adjusting screw rotates to drive the upper limit inclined adjusting block to slide;

s02: lower limit adjustment of the central cylinder: the lower limit adjusting nut is rotated, and the lower limit adjusting nut is in threaded connection with a piston rod of the central cylinder, so that the lower limit adjusting nut moves up and down along the piston rod, and the effective stroke of the central cylinder is changed;

s03: upper limit adjustment of the upper two stamping plates: the upper limit adjustment of the upper two stamping plates is controlled by an adjusting unit connected with the upper two stamping pad plates, a worm in the adjusting unit is rotated, the worm drives a worm wheel to rotate, a pinion coaxially connected with the worm wheel rotates along with the worm wheel, and the pinion drives a large gear on the upper two stamping pad plates to rotate;

s04: lower limit adjustment of the upper two stamping plates: the up-down motion of the upper two die plates is controlled by the upper two auxiliary cylinders, the stroke of the upper two auxiliary cylinders is controlled by an adjusting unit meshed with a lower limit gear at the top of the upper two auxiliary cylinders, a worm in the adjusting unit is rotated, the worm drives a worm wheel to rotate, a pinion coaxially connected with the worm wheel follows the worm wheel to rotate, the pinion drives a large gear meshed with the pinion to rotate, the large gear rotates to drive a lower limit gear meshed with the large gear to rotate, the lower limit gear rotates to drive a screw rod to rotate, and the screw rod is in threaded connection with the upper two auxiliary cylinders and can move up and down relative to the upper two auxiliary cylinders while rotating, so that the stroke of a piston rod of the upper two auxiliary cylinders is changed, and finally the lower limit of the upper two die plates connected with the piston rod of the upper two auxiliary cylinders is changed;

s05: upper limit adjustment of the upper die plate: the lower limit adjustment of the upper punch plate is controlled by an adjusting unit connected with the upper punch pad plate, a worm in the adjusting unit is rotated, the worm drives a worm wheel to rotate, a pinion coaxially connected with the worm wheel rotates along with the worm wheel, and the pinion drives a large gear on the upper two punch pad plates to rotate;

s06: lower limit adjustment of the upper die plate: the up-and-down motion of the upper punch plate is controlled by the upper auxiliary oil cylinder, the stroke of the upper auxiliary oil cylinder is controlled by an adjusting unit meshed with a lower limit gear at the top of the upper auxiliary oil cylinder, a worm in the adjusting unit is rotated, the worm drives a worm wheel to rotate, a pinion coaxially connected with the worm wheel follows the worm wheel to rotate, the pinion rotates to drive a large gear meshed with the pinion to rotate, the large gear rotates to drive a lower limit gear meshed with the large gear to rotate, the lower limit gear rotates to drive a screw to rotate, and the screw can move up and down relative to the upper auxiliary oil cylinder while rotating due to the threaded connection of the screw and the upper auxiliary oil cylinder, so that the stroke of a piston rod of the upper auxiliary oil cylinder is changed, and finally the lower limit of the upper punch plate connected with the piston rod of the upper auxiliary oil cylinder is changed.

The beneficial effect of this scheme: (1) According to the scheme, the upper limit of the upper three punches, the upper two punches and the upper punch can be effectively adjusted respectively, the relative position of each upper punch can be ensured to be stable, the powder quantity of each cavity in the subsequent powder moving process can be distributed as required, the product density distribution in the pressing process is ensured to be symmetrical, and the product defect caused by large density difference in demolding is effectively reduced.

(2) The lower limit of last three drift, last two drifts and last drift can be effectively adjusted respectively to this scheme, effectively prevents that each moving part from overshooting to eliminate the harm that overshoots to the mould and improve the life of mould, guarantee the stability of product in batch production more easily simultaneously.

(3) The scheme adopts a mechanical limiting mode to carry out limiting adjustment, reduces the control on the electrical aspect, and is more stable in operation.

(4) The adjusting unit in this scheme adopts the transmission cooperation of worm wheel, pinion, worm and gear wheel, through rotating worm control gear wheel rotation, can carry out accurate control to the rotation range of gear wheel.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

fig. 2 is a cross-sectional view of A-A in fig. 1.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Reference numerals in the drawings of the specification include: the cylinder body 1, the cylinder bottom 2, the piston rod 3, the upper limit inclined adjusting block 4, the upper limit adjusting base plate 5, the adjusting screw 6, the lower limit adjusting nut 7, the upper three die plates 8, the upper two die plates 9, the upper two die plates 10, the upper die plate 11, the upper die plate 12, the large gear 13, the small shaft 14, the worm wheel 15, the small gear 16, the worm 17, the bearing seat 18, the adjusting bracket 19, the upper die plate limit pad 20, the upper two auxiliary cylinders 21, the upper auxiliary cylinders 22, the screw 23 and the lower limit gear 24.

Example 1

Substantially as shown in figure 1: an upper three devices of a powder forming die comprises a central cylinder, a plurality of upper auxiliary cylinders, a plurality of lower limit gears 24, an upper first punch plate 12, an upper second punch plate 10, an upper three punch plate 8, an upper second punch plate 9, an upper first punch plate 11, guide columns and four adjusting units, wherein the central cylinder comprises a cylinder body 1, a cylinder bottom 2, a piston rod 3, an upper limit inclined adjusting block 4 and an upper limit adjusting plate 5, the cylinder bottom 2 is arranged at the top of the cylinder body 1, the upper limit inclined adjusting block 4 and the upper limit adjusting plate 5 are overlapped between the cylinder bottom 2 and the cylinder body 1, the surfaces, against which the upper limit inclined adjusting block 4 and the upper limit adjusting plate 5 are abutted, are inclined surfaces which are matched with each other, the upper limit inclined adjusting block 4 is narrower than the upper limit adjusting plate 5, an upper thread of the cylinder body 1 is connected with an adjusting screw 6, the end part of the adjusting screw 6 is connected with the upper limit inclined adjusting block 4, the lower part of the piston rod 3 is provided with a lower limit adjusting nut 7, the upper three punch plate 8, the upper second punch plate 9, the upper two punch plates 10, the upper first punch plate 11 and the upper limit adjusting plate 12 are sequentially connected to the upper lower guide columns from the upper end of the upper limit adjusting plate 11 to the upper die plate 10, and the upper lower die plate 11 are sequentially fixed at the upper end of the upper die plate 10 and the upper lower die plate 11 is fixed at the upper end of the upper lower die plate 12;

each adjusting unit comprises a large gear 13 and a transmission adjusting piece, a plurality of transmission adjusting pieces are in transmission connection with the large gears 13, the large gears 13 of the two adjusting units are rotationally connected to the cylinder body 1, the large gears 13 of the other two adjusting units are in threaded connection with the upper two punching base plates 9 and the upper one punching base plate 11, the upper ends of the large gears 13 on the upper two punching base plates 9 are propped against the bottom of the upper three punching plates 8, and the upper ends of the large gears 13 on the upper one punching base plate 11 are propped against the bottom of the upper two punching plates 10; the transmission adjusting piece comprises a small shaft 14, a worm wheel 15, a small gear 16, a worm 17 and a bearing seat 18, two adjusting brackets 19 are further fixed on the cylinder body 1, the two adjusting brackets 19 are respectively positioned below the two large gears 13 on the cylinder body 1, the small shaft 14 in the four adjusting units is respectively and rotatably connected to the two adjusting brackets 19, the upper two die plates 10 and the upper die plate 12, the worm wheel 15 and the small gear 16 are both fixed on the small shaft 14, the worm 17 is connected with the bearing seat 18, the worm 17 is meshed with the worm wheel 15, and the bearing seats 18 in the four adjusting units are respectively fixed on the two adjusting brackets 19, the upper two die plates 10 and the upper die plate 12;

the lower ends of the upper three stamping plates 8 are fixedly provided with a plurality of upper one-plate limiting pads 20, and the lower ends of the upper one-plate limiting pads 20 penetrate through the upper two stamping plates 10 and are propped against the large gear 13 on the upper one stamping plate 11;

the upper auxiliary cylinders are fixed on the upper three die plates 8, screw rods 23 are connected to the tops of the upper auxiliary cylinders in a threaded manner, the bottoms of the screw rods 23 penetrate through the upper auxiliary cylinders to be abutted against piston rods 3 in the upper auxiliary cylinders, the lower limit gears 24 are fixedly connected to the tops of the screw rods 23, the upper auxiliary cylinders comprise two upper two auxiliary cylinders 21 and two upper one auxiliary cylinders 22, the two upper two auxiliary cylinders 21 and the two upper one auxiliary cylinders 22 are uniformly distributed outside the cylinder body 1, the two upper two auxiliary cylinders 21 are diagonally arranged, the two upper one auxiliary cylinders 22 are diagonally arranged, piston rods 3 of the upper two auxiliary cylinders 21 are fixed with the upper two die plates 10, the piston rods 3 of the upper one auxiliary cylinders 22 are fixed with the upper one die plates 12, through holes for the piston rods 3 of the upper two auxiliary cylinders 21 and the upper one auxiliary cylinder 22 to penetrate through are formed in the upper three die plates 8, the lower limit gears 24 on the upper two auxiliary cylinders 21 are meshed with large gears 13 below the upper two auxiliary cylinders 21, and the lower limit gears 24 on the upper one auxiliary cylinder 22 are meshed with the large gears 13 above the cylinder body 1.

Example two

In the first embodiment, the upper three punches are fixed at the bottom of the piston rod 3 of the central cylinder, the upper two punches are fixed at the bottom of the upper two die plates 10, and the upper punch is fixed at the bottom of the upper die plate 12, comprising the following steps:

s01: upper limit adjustment of the central cylinder: the adjusting screw 6 connected with the upper limit inclined adjusting block 4 is rotated, and the adjusting screw 6 is in threaded connection with the cylinder body 1, so that the adjusting screw 6 rotates to drive the upper limit inclined adjusting block 4 to slide;

s02: lower limit adjustment of the central cylinder: the lower limit adjusting nut 7 is rotated, and as the lower limit adjusting nut 7 is in threaded connection with the piston rod 3 of the central cylinder, the lower limit adjusting nut 7 is rotated to enable the lower limit adjusting nut 7 to move up and down along the piston rod 3, so that the effective stroke of the central cylinder is changed;

s03: upper limit adjustment of the upper two die plates 10: the upper limit adjustment of the upper two punch plates 10 is controlled by an adjusting unit connected with the upper two punch base plates 9, a worm 17 in the adjusting unit is rotated, the worm 17 drives a worm wheel 15 to rotate, a pinion 16 coaxially connected with the worm wheel 15 rotates along with the worm wheel 15, the pinion 16 drives a large gear 13 on the upper two punch base plates 9 to rotate, the large gear 13 moves up and down on the upper two punch base plates 9 while rotating due to the fact that the large gear 13 is connected with the upper two punch base plates 9 in a threaded manner, the large gear 13 abuts against an upper three punch plate 8 above, so that the distance between the upper two punch base plates 9 and the upper three punch plates 8 is changed, the distance between the upper two punch plates 10 and the upper three punch plates 8 is finally changed, and the position of the upper two punch plates 10 determines the upper return limit position of the upper two punches, namely the initial position of the upper two punches;

s04: lower limit adjustment of the upper two die plates 10: the up-down motion of the upper two die plates 10 is controlled by the upper two auxiliary cylinders 21, the stroke of the upper two auxiliary cylinders 21 is controlled by an adjusting unit meshed with a lower limit gear 24 at the top of the upper two auxiliary cylinders 21, a worm 17 in the adjusting unit is rotated, the worm 17 drives a worm wheel 15 to rotate, a pinion 16 coaxially connected with the worm wheel 15 rotates along with the worm wheel 15, the pinion 16 drives a large gear 13 meshed with the pinion 16 to rotate, the large gear 13 rotates to drive a lower limit gear 24 meshed with the large gear 13 to rotate, the lower limit gear 24 rotates to drive a screw 23 to rotate, and the screw 23 is in threaded connection with the upper two auxiliary cylinders 21 and can move up and down relative to the upper two auxiliary cylinders 21 while rotating, so that the stroke of a piston rod 3 of the upper two auxiliary cylinders 21 is changed, and finally the lower limit of the upper two die plates 10 connected with the piston rod 3 of the upper two auxiliary cylinders 21 is changed;

s05: upper limit adjustment of the upper die plate 12: the lower limit adjustment of the upper punch plate 12 is controlled by an adjusting unit connected with the upper punch backing plate 11, a worm 17 in the adjusting unit is rotated, the worm 17 drives a worm wheel 15 to rotate, a pinion 16 coaxially connected with the worm wheel 15 rotates along with the worm wheel 15, the pinion 16 drives a large gear 13 on the upper two punch backing plates 9 to rotate, the large gear 13 moves up and down on the upper punch backing plate 11 while being in threaded connection with the upper punch backing plate 11, the large gear 13 abuts against the upper die plate limiting pad 20, so that the distance between the upper punch backing plate 11 and the upper three punch plates 8 is changed, the distance between the upper punch plate 12 and the upper three punch plates 8 is finally changed, and the position of the upper punch plate 12 determines the upper return limit position of the upper punch, namely the initial position of the upper punch;

s06: lower limit adjustment of the upper die plate 12: the up-down movement of the upper die plate 12 is controlled by the upper auxiliary cylinder 22, the stroke of the upper auxiliary cylinder 22 is controlled by an adjusting unit meshed with a lower limit gear 24 at the top of the upper auxiliary cylinder 22, the worm 17 in the adjusting unit is rotated, the worm 17 drives the worm wheel 15 to rotate, the pinion 16 coaxially connected with the worm wheel 15 rotates along with the worm wheel 15, the pinion 16 rotates to drive a large gear 13 meshed with the pinion 16 to rotate, the large gear 13 rotates to drive a lower limit gear 24 meshed with the large gear 13 to rotate, the lower limit gear 24 rotates to drive a screw 23 to rotate, and the screw 23 is in threaded connection with the upper auxiliary cylinder 22 and can move up and down relative to the upper auxiliary cylinder 22 while rotating, so that the stroke of a piston rod 3 of the upper auxiliary cylinder 22 is changed, and finally the lower limit of the upper die plate 12 connected with the piston rod 3 of the upper auxiliary cylinder 22 is changed.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing is merely an embodiment of the present application, and a specific structure and characteristics of common knowledge in the art, which are well known in the scheme, are not described herein, so that a person of ordinary skill in the art knows all the prior art in the application date or before the priority date, can know all the prior art in the field, and has the capability of applying the conventional experimental means before the date, and a person of ordinary skill in the art can complete and implement the present embodiment in combination with his own capability in the light of the present application, and some typical known structures or known methods should not be an obstacle for a person of ordinary skill in the art to implement the present application. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present application, and these should also be considered as the scope of the present application, which does not affect the effect of the implementation of the present application and the utility of the patent. The protection scope of the present application is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims (4)

1. The utility model provides a last three devices of powder forming die which characterized in that: the automatic punching die comprises a central cylinder, a plurality of upper auxiliary cylinders, a plurality of lower limit gears, an upper first punch plate, an upper second punch plate, an upper third punch plate, an upper second punch base plate, an upper first punch base plate, a guide post and a plurality of adjusting units, wherein the central cylinder comprises a cylinder body, a cylinder bottom, a piston rod, an upper limit inclined adjusting block and an upper limit adjusting base plate;

each adjusting unit comprises a large gear and a transmission adjusting piece, a plurality of transmission adjusting pieces are in transmission connection with the large gears, the large gears of two adjusting units are rotationally connected to the cylinder body, the large gears of the other two adjusting units are in threaded connection with the upper two punching base plates and the upper one punching base plate, the upper ends of the large gears on the upper two punching base plates are propped against the bottoms of the upper three punching die plates, and the upper ends of the large gears on the upper one punching base plate are propped against the bottoms of the upper two punching die plates;

the lower ends of the upper three stamping plates are fixedly provided with a plurality of upper one-plate limiting pads, and the lower ends of the upper one-plate limiting pads penetrate through the upper two stamping plates and are propped against a large gear on the upper stamping plate;

the upper auxiliary cylinders are fixed on the upper three die plates, the tops of the upper auxiliary cylinders are connected with screw rods in a threaded manner, the bottoms of the screw rods penetrate through the upper auxiliary cylinders to be propped against piston rods in the upper auxiliary cylinders, the lower limit gears are fixedly connected to the tops of the screw rods, the upper auxiliary cylinders comprise at least one upper two auxiliary cylinders and at least one upper auxiliary cylinder, the piston rods of the upper two auxiliary cylinders are fixed with the upper two die plates, the piston rods of the upper auxiliary cylinders are fixed with the upper one die plate, through holes for the piston rods of the upper two auxiliary cylinders and the upper auxiliary cylinder to penetrate through are formed in the upper three die plates, the through holes for the piston rods of the upper auxiliary cylinders to penetrate through are formed in the upper two die plates, the lower limit gears on the upper two auxiliary cylinders are meshed with the big gears below the cylinder body, and the lower limit gears of the upper auxiliary cylinders are meshed with the big gears above the cylinder body.

2. The three-up device of a powder forming die according to claim 1, wherein: the transmission adjusting piece comprises a small shaft, a worm wheel, a pinion, a worm and a bearing seat, wherein two adjusting brackets are further fixed on the cylinder body, the two adjusting brackets are respectively located below the two large gears on the cylinder body, the small shaft in the adjusting unit is respectively connected to the two adjusting brackets, the upper two stamping plates and the upper one stamping plate in a rotating mode, the worm wheel and the pinion are respectively fixed on the small shaft, the worm is connected with the bearing seat, the worm is meshed with the worm wheel, and the bearing seats in the four adjusting units are respectively fixed on the two adjusting brackets, the upper two stamping plates and the upper one stamping plate.

3. The three-up device of a powder forming die according to claim 2, wherein: the upper auxiliary cylinders comprise two upper two auxiliary cylinders and two upper one auxiliary cylinders, the two upper two auxiliary cylinders and the two upper one auxiliary cylinders are uniformly distributed on the outer side of the cylinder body, the two upper two auxiliary cylinders are diagonally arranged, and the two upper one auxiliary cylinders are diagonally arranged.

4. The method for adjusting the upper three devices of the powder forming die is characterized by comprising the following steps of: a three-part apparatus using a powder molding die according to any one of claims 2 or 3, comprising the steps of:

s01: upper limit adjustment of the central cylinder: the adjusting screw connected with the upper limit inclined adjusting block is rotated, and the adjusting screw is in threaded connection with the cylinder body, so that the adjusting screw rotates to drive the upper limit inclined adjusting block to slide;

s02: lower limit adjustment of the central cylinder: the lower limit adjusting nut is rotated, and the lower limit adjusting nut is in threaded connection with a piston rod of the central cylinder, so that the lower limit adjusting nut moves up and down along the piston rod, and the effective stroke of the central cylinder is changed;

s03: upper limit adjustment of the upper two stamping plates: the upper limit adjustment of the upper two stamping plates is controlled by an adjusting unit connected with the upper two stamping pad plates, a worm in the adjusting unit is rotated, the worm drives a worm wheel to rotate, a pinion coaxially connected with the worm wheel rotates along with the worm wheel, and the pinion drives a large gear on the upper two stamping pad plates to rotate;

s04: lower limit adjustment of the upper two stamping plates: the up-down motion of the upper two die plates is controlled by the upper two auxiliary cylinders, the stroke of the upper two auxiliary cylinders is controlled by an adjusting unit meshed with a lower limit gear at the top of the upper two auxiliary cylinders, a worm in the adjusting unit is rotated, the worm drives a worm wheel to rotate, a pinion coaxially connected with the worm wheel follows the worm wheel to rotate, the pinion drives a large gear meshed with the pinion to rotate, the large gear rotates to drive a lower limit gear meshed with the large gear to rotate, the lower limit gear rotates to drive a screw rod to rotate, and the screw rod is in threaded connection with the upper two auxiliary cylinders and can move up and down relative to the upper two auxiliary cylinders while rotating, so that the stroke of a piston rod of the upper two auxiliary cylinders is changed, and finally the lower limit of the upper two die plates connected with the piston rod of the upper two auxiliary cylinders is changed;

s05: upper limit adjustment of the upper die plate: the lower limit adjustment of the upper punch plate is controlled by an adjusting unit connected with the upper punch pad plate, a worm in the adjusting unit is rotated, the worm drives a worm wheel to rotate, a pinion coaxially connected with the worm wheel rotates along with the worm wheel, and the pinion drives a large gear on the upper two punch pad plates to rotate;

s06: lower limit adjustment of the upper die plate: the up-and-down motion of the upper punch plate is controlled by the upper auxiliary oil cylinder, the stroke of the upper auxiliary oil cylinder is controlled by an adjusting unit meshed with a lower limit gear at the top of the upper auxiliary oil cylinder, a worm in the adjusting unit is rotated, the worm drives a worm wheel to rotate, a pinion coaxially connected with the worm wheel follows the worm wheel to rotate, the pinion rotates to drive a large gear meshed with the pinion to rotate, the large gear rotates to drive a lower limit gear meshed with the large gear to rotate, the lower limit gear rotates to drive a screw to rotate, and the screw can move up and down relative to the upper auxiliary oil cylinder while rotating due to the threaded connection of the screw and the upper auxiliary oil cylinder, so that the stroke of a piston rod of the upper auxiliary oil cylinder is changed, and finally the lower limit of the upper punch plate connected with the piston rod of the upper auxiliary oil cylinder is changed.