Dual-pressure prevention device for hydraulic press

Abstract

The utility model relates to a double pressure prevention device for a hydraulic press, which comprises a first support rod, a second support rod and a material tray, a stop lever is connected between the top of the first support rod and the top of the second support rod, the material tray is placed on the top of the first support rod and the top of the second support rod, and the material tray is positioned below the stop lever. The bottoms of the first supporting rod and the second supporting rod are installed on the material box. According to the utility model, when the conveying system drives the material box to pass through the upper part of the die cavity, the stop lever can push down a product clamped at the stamping end of the upper die, and the pushed-down product falls into the material disc, so that when the die continuously produces the next product, the situation of double pressure between products is prevented, the damage of the die due to overlarge pressure is avoided, and the production efficiency is improved. The service life of the mold is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic presses, in particular to a double pressure prevention device for hydraulic presses. Background Art

[0002] At present, there are different powder metallurgy forming methods and many classifications. Our most common powder pressing forming is carried out on a press, and the commonly used hydraulic press requires the use of a complete set of molds, including an upper punch, a die cavity, a lower punch and a core rod. When the mold is in operation, it first drives the material box containing the metal powder mixture through the top of the die cavity through the conveying system. The material box with a shaking function evenly pours the metal powder mixture into the die cavity. The die cavity determines the appearance of the product, and the core rod in the die cavity determines the aperture of the product. Finally, the powder is pressurized and formed by the upper and lower punches. After the pressure is released, the product is removed from the die cavity to complete the forming process. However, in this process, the core rod may break inside the upper punch, causing the product to be entrained in the stamping end of the upper punch. When the next product is produced continuously, the product will be double-pressed, which can easily cause the mold to be damaged due to excessive pressure. In severe cases, the entire set of molds will be scrapped. Utility Model Content

[0003] The purpose of the utility model is to design a double pressure prevention device for a hydraulic press, so that the problems mentioned in the background technology can be solved.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A double pressure prevention device for a hydraulic press comprises a first support rod, a second support rod and a material tray, wherein a blocking rod is connected between the tops of the first support rod and the second support rod, the material tray is placed on the tops of the first support rod and the second support rod, the material tray is located below the blocking rod, and the bottoms of the first support rod and the second support rod are mounted on a material box.

[0006] Furthermore, the interiors of the first support rod and the second support rod are both hollow structures, one end of the baffle rod is fixedly connected to a first sliding rod that is slidably connected to the interior of the first support rod, and the other end of the baffle rod is fixedly connected to a second sliding rod that is slidably connected to the interior of the second support rod. A threaded hole is provided on the side of the first support rod, and a bolt is threaded on the threaded hole, and one end of the bolt passes through the threaded hole and contacts the first sliding rod.

[0007] Furthermore, the bottom of the material tray is respectively fixedly connected with a first sleeve groove and a second sleeve groove adapted to the top of the first support rod and the second support rod, and the bottom of the material tray is respectively provided with a first through hole and a second through hole connected to the first sleeve groove and the second sleeve groove, the first slide rod passes through the first through hole, and the second slide rod passes through the second through hole.

[0008] Furthermore, the inner walls of the tray are all inclined.

[0009] Furthermore, a rubber pad is provided on the baffle bar.

[0010] The beneficial effects of the utility model are:

[0011] By installing a first support rod and a second support rod on the material box, a baffle rod is connected between the tops of the first support rod and the second support rod, and the material tray is placed on the tops of the first support rod and the second support rod, and the material tray is located below the baffle rod, so that when the conveying system drives the material box to pass over the top of the mold cavity, the baffle rod can push down the product entrained at the stamping end of the upper punch, and the pushed down product will fall into the material tray. When the mold continuously produces the next product, double pressure of products can be prevented, the mold can be avoided from being damaged due to excessive pressure, and the service life of the mold can be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a cross-sectional view of the utility model;

[0015] Figure 3 It is a structural schematic diagram of the connection between the middle stop rod and the first support rod and the second support rod of the utility model;

[0016] Figure 4 It is a cross-sectional view of the material tray in the utility model;

[0017] Figure 5 It is a schematic diagram of the operating structure of the utility model.

[0018] The names of the components marked in the figure are as follows:

[0019] 1. First support rod; 2. Second support rod; 3. Material tray; 4. Stop rod; 5. First slide rod; 6. Second slide rod; 7. Threaded hole; 8. Bolt; 9. First set of grooves; 10. Second set of grooves; 11. First through hole; 12. Second through hole; 13. Rubber pad; 14. Material box; 15. Upper punch; 16. Lower punch; 17. Cavity; 18. Mandrel; 19. Product. DETAILED DESCRIPTION

[0020] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0021] like Figure 1-5 The bottom of the material tray 3 is respectively provided with a first sleeve groove 9 and a second sleeve groove 10 which are adapted to the top of the first support rod 1 and the second support rod 2, so that the material tray 3 can be placed on the top of the first support rod 1 and the second support rod 2 by inserting, and the material tray 3 can be disassembled; the inner wall of the material tray 3 is inclined, and since the material box 14 has a shaking function, the product 19 fed into the material tray 3 will also shake accordingly, and the inclined inner wall can prevent the product 19 from shaking out of the material tray 3 due to shaking to a certain extent; the bottom of the material tray 3 is respectively provided with a first through hole 11 and a second through hole 12 which are connected to the first sleeve groove 9 and the second sleeve groove 10, the interior of the first support rod 1 and the second support rod 2 are both hollow structures, and one end of the baffle rod 4 is fixedly connected to a first slide bar 5, and the first slide bar 5 passes through the first through hole 11 and the first slide bar 5 The inner sliding connection of a support rod 1, the other end of the baffle rod 4 is fixedly connected with a second sliding rod 6, the second sliding rod 6 passes through the second through hole 12 and is slidably connected with the inner side of the second support rod 2, so as to facilitate the adjustment of the height of the baffle rod 4, so that the baffle rod 4 can be adjusted according to the height of the stamping end of the die punch 15 on different hydraulic presses, so that the baffle rod 4 can be aligned with the product 19 clamped at the stamping end, which has good practicality; a rubber pad 13 is affixed to the baffle rod 4, which is used to align with the product 19 that needs to be pushed down, and has a buffering effect to reduce damage to the product 19; the material tray 3 is located below the baffle rod 4, and a threaded hole 7 is provided on the side of the first support rod 1, and a bolt 8 is threadedly connected to the threaded hole 7. One end of the bolt 8 passes through the threaded hole 7 and contacts with the first sliding rod 5. By tightening the bolt 8, the first sliding rod 5 is pressed tightly against the inside of the first support rod 1, thereby fixing the baffle rod 4; the bottoms of the first support rod 1 and the second support rod 2 are installed on the material box 14.

[0022] Working principle:

[0023] like Figure 1-5As shown, when the double pressure prevention device is used, the blocking rod 4 is first adjusted according to the height of the punching end of the upper punch 15 of the hydraulic press, so that when the punching end of the upper punch 15 clamps the product 19, the blocking rod 4 can be aligned with the product 19;

[0024] The conveying system drives the material box 14 filled with the metal powder mixture to pass over the die cavity 17. The material box 14 with a shaking function evenly pours the metal powder mixture into the die cavity 17. The die cavity 17 determines the appearance of the product 19. The core rod 18 in the die cavity 17 determines the aperture of the product 19. Finally, the powder is pressurized and formed by the upper die punch 15 and the lower die punch 16. After the pressure is released, the product 19 is removed from the die cavity, completing the forming process.

[0025] However, during this process, when the core rod 18 breaks inside the upper punch 15, causing the product 19 to be trapped in the stamping end of the upper punch 15, when continuously producing the next product 19, the material box 14 containing the metal powder mixture will pass over the die cavity 17. At this time, the baffle 4 located above the material box 14 will push down the product trapped in the stamping end of the upper punch 15, and the pushed down product will fall into the material tray 3.

[0026] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A double pressure prevention device for a hydraulic press, characterized in that: The material tray (3) comprises a first support rod (1), a second support rod (2) and a material tray (3); a blocking rod (4) is connected between the tops of the first support rod (1) and the second support rod (2); the material tray (3) is placed on the tops of the first support rod (1) and the second support rod (2); the material tray (3) is located below the blocking rod (4); and the bottoms of the first support rod (1) and the second support rod (2) are mounted on a material box (14).

2. The double pressure prevention device for a hydraulic press according to claim 1, characterized in that: The interiors of the first support rod (1) and the second support rod (2) are both hollow structures; one end of the blocking rod (4) is fixedly connected to a first sliding rod (5) slidably connected to the interior of the first support rod (1); the other end of the blocking rod (4) is fixedly connected to a second sliding rod (6) slidably connected to the interior of the second support rod (2); a threaded hole (7) is provided on the side of the first support rod (1); a bolt (8) is threadedly connected to the threaded hole (7); one end of the bolt (8) passes through the threaded hole (7) and contacts the first sliding rod (5).

3. The double pressure prevention device for a hydraulic press according to claim 2, characterized in that: The bottom of the material tray (3) is respectively fixedly connected with a first sleeve groove (9) and a second sleeve groove (10) adapted to the top of the first support rod (1) and the second support rod (2); the bottom of the material tray (3) is respectively provided with a first through hole (11) and a second through hole (12) connected to the first sleeve groove (9) and the second sleeve groove (10); the first slide rod (5) passes through the first through hole (11) and the second slide rod (6) passes through the second through hole (12).

4. The double pressure prevention device for a hydraulic press according to claim 1, characterized in that: The inner wall of the material tray (3) is arranged to be inclined.

5. The double pressure prevention device for a hydraulic press according to claim 1, characterized in that: A rubber pad (13) is provided on the blocking rod (4).

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