CN219188617U

CN219188617U - Powder forming hydraulic press with demolding function

Info

Publication number: CN219188617U
Application number: CN202320057840.6U
Authority: CN
Inventors: 夏卫明; 王冬仙; 冷云龙
Original assignee: Jiangsu Yangli Hydraulic Equipment Co ltd
Current assignee: Jiangsu Yangli Hydraulic Equipment Co ltd
Priority date: 2023-01-09
Filing date: 2023-01-09
Publication date: 2023-06-16
Anticipated expiration: 2033-01-09

Abstract

The utility model discloses a powder forming hydraulic press with a demolding function, which comprises a machine body, a main sliding block, a main cylinder and a workbench, wherein a sliding block width bedplate is fixed at the bottom of the main sliding block, an upper die for pressing powder is fixed on the sliding block width bedplate, return brackets are symmetrically arranged on the left side and the right side of the main sliding block, and the two return brackets are respectively connected with the top of a return plunger of a return cylinder; the upper part of the workbench is overlapped with a demoulding slide block, ejection cylinders are respectively arranged below four corners of the workbench, ejection rods of the ejection cylinders penetrate through the workbench to be connected with the corners of the demoulding slide block, and demoulding slide block guide rails are respectively arranged at four outer corners of the demoulding slide block; the central area of drawing of patterns slider is equipped with the mould mounting hole, installs the lower mould that link up in the mould mounting hole. The powder molding hydraulic press with the demolding function is convenient to demold after powder molding, and convenient to clean powder scraps after demolding, and recovers the cleanliness of a workbench and a die cavity.

Description

Powder forming hydraulic press with demolding function

Technical Field

The utility model relates to a hydraulic machine applied to large tonnage nominal force, in particular to a powder forming hydraulic machine with a demoulding function, and belongs to the technical field of hydraulic machines.

Background

In the traditional powder metallurgy hydraulic press, a larger ejection cylinder is required to be installed below a workbench, after powder hydraulic forming, a die is kept still, and a workpiece is ejected from the die by the ejection cylinder. Because a small amount of metal powder is surplus during powder metallurgy feeding and forming, after a workpiece is ejected, a small amount of metal powder remains in a die cavity and on a workbench and is difficult to clean, and the next step is affected.

In addition, the connection mode of a main oil cylinder and an upper beam of the current hydraulic machine is mainly installed by an oil cylinder compression flange, a main cylinder body is inserted into an installation hole of the upper beam, the cylinder body compression flange surface abuts against the lower bottom surface of the upper beam, and the upper plane of the upper beam is locked by a large lock nut.

For a large-tonnage master cylinder, the outer diameter of the cylinder body is large, the size of a mounting hole corresponding to the upper cross beam of the hydraulic machine is also large by adopting a conventional mounting mode, and the size of the rib plate of the upper cross beam is limited, so that the reduction of the size of the hydraulic machine body is limited, and the weight and the cost are increased due to the increase of the size of the hydraulic machine. Moreover, the large oil cylinder is not suitable for locking by a large lock nut, the outer diameter of the large oil cylinder is large, the diameter and the thickness of the large lock nut are correspondingly increased, the weight is also large, the labor intensity is high by means of manual rotation locking, the labor is limited, and the expected locking effect cannot be achieved.

The utility model patent of China with the publication number of CN 202498750U discloses a powder forming hydraulic press, which comprises a frame, and an upper template, a female template, a middle fixed template and a fixed template which are sequentially arranged on the frame from top to bottom, wherein the female template is connected with a top cylinder through a guide pillar, two sides of the lower end face of the female template are provided with small hydraulic cylinders in the horizontal direction, and the end parts of the small hydraulic cylinders are connected with limiting blocks. When pressing, the small hydraulic cylinder is ejected to serve as a fixed limit, and when a workpiece in the female die needs to be demolded, the small hydraulic cylinder retreats, and the top cylinder connected with the female die plate pulls the female die plate to sink, so that the workpiece in the female die plate can be ejected out of the female die cavity by the fixed lower punch to finish demolding.

In the demolding process of the powder molding hydraulic machine, the top cylinder is used for pulling the female die plate back to move downwards after molding, so that a workpiece touches a fixed lower punch to realize upward demolding. This demolding has the following disadvantages:

1. the upward demolding workpiece is finally ejected upwards or relatively ejected upwards in a conventional mode, a certain amount of powder scraps exist in the die cavity and are difficult to clean, and a separate cleaning tool such as compressed air is required to be matched for blowing;

2. the middle of the fixed template is provided with a hole, so that the lower punch can conveniently pass through, and the rest unshaped powder in the demolding process can vibrate along with the movement of the mold, falls into the fixed template and the fixed template hole and is gradually accumulated, so that the cleaning difficulty is very high;

3. the dropped powder can enter the guiding part of the lower punch to cause the clamping or the pulling abrasion of the material ejection rod;

4. the feeding and taking difficulties are large, an upper punch is arranged above the die, the whole space is small, and the feeding and taking space is small;

5. the workpiece is easy to be broken, the strength of the workpiece after powder molding is not very high, and if the bonding force (friction force) between the workpiece and a die cavity is too high, the workpiece is easy to be broken by a lower punch in the process of pulling down the top cylinder.

Disclosure of Invention

The utility model aims to overcome the problems in the prior art and provide a powder forming hydraulic press with a demolding function, which is convenient for demolding after powder forming, cleaning powder scraps after demolding and recovering the cleaning of a workbench and a die cavity.

In order to solve the technical problems, the powder forming hydraulic press with the demolding function comprises a machine body, a main sliding block, a main cylinder and a workbench, wherein a sliding block width bedplate is fixed at the bottom of the main sliding block, an upper die for pressing powder is fixed on the sliding block width bedplate, return brackets are symmetrically arranged on the left side and the right side of the main sliding block, and the two return brackets are respectively connected with the top of a return plunger of the return cylinder; the upper part of the workbench is overlapped with a demoulding slide block, ejection cylinders are respectively arranged below four corners of the workbench, ejection rods of the ejection cylinders penetrate through the workbench and are connected with the corners of the demoulding slide block, and demoulding slide block guide rails are respectively arranged at four outer corners of the demoulding slide block; the center area of drawing of patterns slider is equipped with the mould mounting hole, installs the lower mould that link up in the mould mounting hole.

As an improvement of the utility model, the cylinder body of the main cylinder is embedded in the mounting hole of the main sliding block, the top of the plunger of the main cylinder is fixedly provided with a cylinder cover, and the cylinder cover is fixedly connected below the center of the upper cross beam of the machine body.

As a further improvement of the utility model, the rear side of the demoulding slide block is provided with a feeding mechanism, the feeding mechanism comprises a hopper, a feeding oil cylinder and a feeding guide rod, the lower port of the hopper is positioned on a feeding support plate, the rear side wall of the hopper is fixedly provided with a hopper connecting plate, the middle part of the hopper connecting plate is connected with the front end of a piston rod of the feeding oil cylinder, the feeding oil cylinder is fixed on a feeding oil cylinder support, and the bottom of the feeding oil cylinder support is fixed on the feeding support plate; the feeding guide rods penetrate through the feeding guide sleeves respectively, and the feeding guide sleeves are fixed on the feeding oil cylinder support respectively.

As a further improvement of the utility model, the rear ends of the two feeding guide rods are connected with each other through an arc-shaped feeding guide rod connecting plate.

As a further improvement of the utility model, the outer side of one feeding guide rod is provided with a feeding signal bracket parallel to the feeding guide rod, one end of the feeding guide rod connecting plate extends outwards to form a feeding signal end, and the feeding signal bracket is provided with a rear limit, a working position and an ejection limit position proximity switch for detecting the position of the feeding signal end.

As a further improvement of the utility model, the feeding support plate is spliced at the rear side of the demoulding slide block, and the top surfaces of the feeding support plate and the demoulding slide block are flush.

As a further improvement of the utility model, a thrust knuckle bearing is arranged between the ejector rod of the ejector cylinder and the corner of the demoulding slide block, and a thrust knuckle bearing is also arranged between the return plunger of the return cylinder and the return bracket.

As a further improvement of the utility model, the machine body is formed by superposing and welding a plurality of steel plates, and the return cylinder is arranged in a concave part of the machine body.

Compared with the prior art, the utility model has the following beneficial effects: after powder is pressed and formed, the demolding slide block can be ejected upwards under the condition of keeping the main slide block pressed, so that the separation of a die cavity and a workpiece is realized, and excessive powder is scattered on a workbench and cannot be retained in a lower die; the pushing mechanism can push the workpiece, scraps, sundries and the like away from the workbench together, so that sundries are prevented from damaging the working surface by crushing when the demoulding slide block falls down.

Drawings

The utility model will now be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration only and are not intended to limit the utility model.

FIG. 1 is a front view of a powder forming hydraulic press with a stripper function of the present utility model;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a perspective view of a stripper shoe of the present utility model;

FIG. 4 is a perspective view of a loading mechanism according to the present utility model;

FIG. 5 is a perspective view of the pushing mechanism of the present utility model;

in the figure: 1. a hydraulic pump station; 2. an oil return pipe; 3. an air cleaner; 4. a liquid charging box; 5. a liquid filling pipe; 6. a body; 7. a charging valve; 8. a master cylinder; 9. a main slider; 10. a slider web platen; 11. a fuselage guide rail; 12. demolding sliding blocks; 12a, a die mounting hole; 12b, ejector rod fixing holes; 12c, lifting holes; 12d, demoulding slide block guide rails; 12e, copper guide plates; 13. a work table; 14. a thrust knuckle bearing; 15. an ejection cylinder; 16. a foundation; 17. a hydraulic safety bolt; 18. a thrust knuckle bearing; 19. a return cylinder; 20. a feeding mechanism; 20a, a hopper; 20b, connecting a hopper; 20c, feeding a support plate; 20d, a feeding oil cylinder bracket; 20e, a feeding oil cylinder; 20f, pipe clamps; 20g, a feeding guide rod; 20h, feeding guide sleeve; 20j, connecting a feeding guide rod; 20k, feeding a signal bracket; 20m, a rear limit proximity switch; 20n, a working position approach switch; 20p, ejecting a limit position proximity switch; 20q, preparing a welding backing plate; 21. a pushing mechanism; 21a, a pushing plate; 21b, a pushing oil cylinder; 21c, pushing a material guide rod; 21d, pushing a material guide sleeve; 21e, a pushing oil cylinder bracket; 21f, a pushing guide rod connecting plate; 21g, pushing the material base; 21h, pushing a material signal bracket; and 21j, pushing the material to approach the switch.

Detailed Description

In the following description of the present utility model, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present utility model and simplifying the description, and do not mean that the device must have a specific orientation.

The utility model is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the utility model easy to understand.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

As shown in fig. 1 to 3, the powder molding hydraulic press with a demolding function of the present utility model includes a main body 6, a main slider 9, a master cylinder 8 and a table 13, the bottom of the main body 6 is fixed in a foundation 16 by means of ground anchor bolts,

the master cylinder 8 is a cylinder-operated plunger cylinder, the cylinder body is embedded in a mounting hole of the main sliding block 9, a cylinder cover is fixed at the top of a plunger of the master cylinder 8, and the top of the cylinder cover is fixedly connected below the center of an upper cross beam of the machine body 6. The large hole for installing the oil cylinder is not required to be formed in the upper beam of the machine body, the size of the machine body in the front-back direction of the machine body 6 can be greatly reduced, the weight of the machine body of the hydraulic machine is greatly reduced, raw materials are saved, the production cost is reduced, the stress area of the cylinder cover and the upper beam of the structure is increased, the stress concentration of the upper beam is reduced, and the strength of the upper beam is higher than that of the upper beam of a conventional open-pore structure.

The front end face and the rear end face of the cylinder cover are symmetrically provided with filling valve mounting holes, and filling valves 7 are respectively arranged in the two filling valve mounting holes. The liquid filling box 4 is fixed at the top of the machine body 6 through a liquid filling box bracket, and an air filter 3 is arranged at a top breathing port of the liquid filling box 4. Two liquid filling holes are formed in the front, rear and lower sides of the liquid filling box 4 and are connected to an oil suction port of the liquid filling valve 7 through a butterfly valve pipeline, so that oil is replenished when the main cylinder 8 is quickly lowered and liquid is quickly discharged when the sliding block returns. The side surface of the liquid filling box 4 is provided with an oil return hole at a certain height position, the oil return hole is connected to an oil tank of the hydraulic pump station 1 through a large-caliber oil return pipe 2, when the sliding block returns, a large amount of oil in the main cylinder 8 returns to the liquid filling box 4, and redundant oil overflows back to the oil tank of the pump station through the liquid filling pipe 5.

The bottom of the main sliding block 9 is fixed with a sliding block width bedplate 10, an upper die for pressing powder is fixed on the sliding block width bedplate 10, return brackets are symmetrically arranged on the left side and the right side of the main sliding block 9, and the two return brackets are respectively connected with the top of a return plunger of the return cylinder 19. The machine body 6 is formed by overlapping and welding a plurality of steel plates, and the return cylinder 19 is arranged in a concave part of the machine body 6. The thrust knuckle bearing 18 is arranged between the return plunger of the return cylinder 19 and the return bracket, so that the lateral force of offset load or installation error on the guide part of the piston rod of the return cylinder can be eliminated, and the requirement on the size of the installation position can be reduced. A hydraulic safety bolt 17 is arranged at the position of the return hole on the return bracket.

The four corners of the main slide block 9 are respectively provided with a main slide block guide rail, and each main slide block guide rail is respectively matched with the machine body guide rail 11 to control the lifting stability of the main slide block 9.

The stripper slide 12 is overlapped above the workbench 13, the ejector cylinders 15 are respectively arranged below the four corners of the workbench 13, ejector rod fixing holes 12b are respectively arranged at the four corners of the stripper slide 12, ejector rods of the ejector cylinders 15 penetrate through the workbench 13 and are fixed in the ejector rod fixing holes 12b at the corners of the stripper slide 12, and thrust knuckle bearings 14 are arranged between the ejector rods of the ejector cylinders 15 and the corners of the stripper slide 12 so as to eliminate side force of offset load or installation errors on guide parts of piston rods of the ejector cylinders. The four outer corners of the demoulding slide block 12 are respectively provided with a demoulding slide block guide rail 12d, and the working surface of the demoulding slide block guide rail 12d is fixed with a copper guide plate 12e which is matched with the machine body guide rail 11. Lifting holes 12c extending transversely are symmetrically formed in the side walls of the demoulding slide block 12, and the demoulding slide block 12 can be lifted conveniently during installation.

The center area of the demoulding slide block 12 is provided with a mould mounting hole 12a, a through lower mould is arranged in the mould mounting hole 12a, and a flange of the lower mould is fixed on an inner step of the mould mounting hole 12a.

The rear side of the demoulding slide block 12 is provided with a feeding mechanism 20, and the rear side of the demoulding slide block 12 and the lower part of the feeding mechanism 20 are provided with a pushing mechanism 21.

As shown in fig. 4, the feeding mechanism 20 includes a hopper 20a, a feeding cylinder 20e and a feeding guide rod 20g, and a lower port of the hopper 20a is located on a feeding support plate 20c to receive powder. The rear side wall of the hopper 20a is fixed with a hopper connecting plate 20b, the middle part of the hopper connecting plate 20b is connected with the front end of a piston rod of a feeding cylinder 20e, the front end of the feeding cylinder 20e is fixed on a feeding cylinder bracket 20d, and the rear end is fixed on a feeding bracket plate 20c through a pipe clamp 20f. The bottom of the feeding cylinder bracket 20d is fixed on a matched welding backing plate 20q, and the matched welding backing plate 20q is fixed on a feeding bracket plate 20c.

The feeding support plate 20c is spliced at the rear side of the demoulding slide block 12, and the top surfaces of the feeding support plate and the demoulding slide block are flush. The two sides of the hopper connecting plate 20b are symmetrically connected with feeding guide rods 20g, the feeding guide rods 20g respectively penetrate through feeding guide sleeves 20h, the feeding guide sleeves 20h are respectively fixed on a feeding oil cylinder support 20d, and in the process of driving the hopper 20a to translate by the feeding oil cylinder 20e, the accuracy of the direction of the feeding guide rods is ensured by the two feeding guide rods 20g.

As shown in fig. 5, the pushing mechanism 21 comprises a pushing plate 21a, a pushing cylinder 21b and a pushing guide rod 21c, wherein the middle part of the pushing plate 21a is connected with the front end of a piston rod of the pushing cylinder 21b, the pushing cylinder 21b is fixed on a pushing cylinder bracket 21e, and the bottom of the pushing cylinder bracket 21e is fixed on a pushing base 21 g; the two pushing guide rods 21c are symmetrically located at two sides of the pushing cylinder 21b, the two pushing guide rods 21c respectively penetrate through the pushing guide sleeve 21d and are connected with the pushing plate 21a, and the pushing guide sleeves 21d are respectively fixed on the pushing cylinder support 21e.

The powder material falls into the hopper 20a through the conveying device, a piston rod of the feeding cylinder 20e extends out, the hopper 20a is pushed forward to the lower port of the hopper to be aligned with the die mounting hole 12a of the demoulding slide block 12, the powder material in the hopper 20a falls into the die cavity, and then the piston rod of the feeding cylinder 20e contracts, so that the hopper 20a is pulled back to the outer side of the demoulding slide block 12.

The rear ends of the two feeding guide rods 20g are connected with each other through an arc-shaped feeding guide rod connecting plate 20j, so that on one hand, the strength and the operation stability of the two feeding guide rods 20g are improved, and on the other hand, one end of the feeding guide rod connecting plate 20j extends outwards to form a feeding signal transmitting end. The outer side of one feeding guide rod 20g is provided with a feeding signal bracket 20k parallel to the feeding guide rod, and a rear limit proximity switch 20m, a working position proximity switch 20n and an ejection limit position proximity switch 20p for detecting the position of a feeding transmitting end are arranged on the feeding signal bracket 20k and send position signals of a feeding oil cylinder 20e to a control system.

After the loading is completed, the main slide block 9 is pressed down quickly, and the powdery raw materials are pressed and molded to form a workpiece. Then the main slide block 9 presses the workpiece to be motionless, the ejector rod of the ejector cylinder 15 stretches out to push the demoulding slide block 12 to move upwards, and the formed workpiece is separated from the mould cavity to realize demoulding.

After demoulding, a piston rod of a pushing cylinder 21b arranged at the rear side of the machine body workbench 13 extends out to push out the workpiece to the outer side of the machine body. The lower edge of the pushing plate 21a is abutted against the surface of the workbench 13, and the length of the pushing plate 21a is longer than that of the workbench 13; during the pushing process, the scattered materials on the workbench 13 are scraped out of the machine body, so that sundries are prevented from damaging the working surface by crushing between the demoulding slide block 12 and the workbench 13 when the demoulding slide block falls.

The rear ends of the two pushing guide rods 21c are connected through a pushing guide rod connecting plate 21f, and one end of the pushing guide rod connecting plate 21f extends outwards to form a feeding signal end. The outer side of one of the two pushing guide rods 21c is provided with a pushing signal bracket 21h parallel to the pushing guide rods, and three pushing proximity switches 21j are arranged on the pushing signal bracket 21h to monitor the position of a piston rod of the pushing oil cylinder 21b.

The foregoing description of the preferred embodiments of the present utility model illustrates and describes the basic principles, main features and advantages of the present utility model, and is not intended to limit the scope of the present utility model, as it should be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments. In addition to the embodiments described above, other embodiments of the utility model are possible without departing from the spirit and scope of the utility model. The utility model also has various changes and improvements, and all technical schemes formed by adopting equivalent substitution or equivalent transformation fall within the protection scope of the utility model. The scope of the utility model is defined by the appended claims and equivalents thereof. The technical features of the present utility model that are not described may be implemented by or using the prior art, and are not described herein.

Claims

1. The utility model provides a powder shaping hydraulic press with drawing of patterns function, includes fuselage, main slider, master cylinder and workstation, its characterized in that: the bottom of the main sliding block is fixedly provided with a sliding block width bedplate, an upper die for pressing powder is fixedly arranged on the sliding block width bedplate, return brackets are symmetrically arranged on the left side and the right side of the main sliding block, and the two return brackets are respectively connected with the top of a return plunger of the return cylinder;

the upper part of the workbench is overlapped with a demoulding slide block, ejection cylinders are respectively arranged below four corners of the workbench, ejection rods of the ejection cylinders penetrate through the workbench and are connected with the corners of the demoulding slide block, and demoulding slide block guide rails are respectively arranged at four outer corners of the demoulding slide block; the center area of drawing of patterns slider is equipped with the mould mounting hole, installs the lower mould that link up in the mould mounting hole.

2. The powder molding hydraulic machine with a demolding function as claimed in claim 1, wherein: the cylinder body of the master cylinder is embedded in the mounting hole of the main sliding block, a cylinder cover is fixed at the top of the plunger of the master cylinder, and the cylinder cover is fixedly connected below the center of the upper cross beam of the machine body.

3. The powder molding hydraulic machine with a demolding function as claimed in claim 1, wherein: the rear side of the demoulding slide block is provided with a feeding mechanism, the feeding mechanism comprises a hopper, a feeding oil cylinder and a feeding guide rod, the lower port of the hopper is positioned on a feeding support plate, the rear side wall of the hopper is fixedly provided with a hopper connecting plate, the middle part of the hopper connecting plate is connected with the front end of a piston rod of the feeding oil cylinder, the feeding oil cylinder is fixed on a feeding oil cylinder support, and the bottom of the feeding oil cylinder support is fixed on the feeding support plate;

the feeding guide rods penetrate through the feeding guide sleeves respectively, and the feeding guide sleeves are fixed on the feeding oil cylinder support respectively.

4. A powder forming hydraulic machine with a demoulding function according to claim 3, characterized in that: the rear ends of the two feeding guide rods are connected with each other through an arc-shaped feeding guide rod connecting plate.

5. The powder molding hydraulic machine with a demolding function as claimed in claim 4, wherein: the outer side of one feeding guide rod is provided with a feeding signal bracket parallel to the feeding guide rod, one end of the feeding guide rod connecting plate extends outwards to form a feeding signal end, and a rear limit, a working position and an ejection limit position proximity switch for detecting the position of the feeding signal end are arranged on the feeding signal bracket.

6. A powder forming hydraulic machine with a demoulding function according to claim 3, characterized in that: the material loading mounting panel concatenation is in the rear side of drawing of patterns slider, and both top surfaces parallel and level.

7. The powder molding hydraulic machine with a demolding function as claimed in claim 1, wherein: a thrust knuckle bearing is arranged between the ejector rod of the ejector cylinder and the corner of the demoulding slide block, and a thrust knuckle bearing is also arranged between the return plunger of the return cylinder and the return bracket.

8. The powder molding hydraulic machine with a demolding function as claimed in claim 1, wherein: the machine body is formed by overlapping and welding a plurality of steel plates, and the return cylinder is arranged at the concave part of the machine body.