Powder metallurgy die for connecting rod

Abstract

The utility model discloses a powder metallurgy die of a connecting rod, and relates to the technical field of connecting rod manufacturing and processing, the powder metallurgy die of the connecting rod comprises an upper die, a lower die, a shielding cover and a powder concentration piece, the lower die comprises a template, and the template is provided with a connecting rod die in an embedded mode; the shielding cover is fixed at the upper end of the template and wraps the connecting rod die, a die pressing opening matched with the upper die is formed in the top of the shielding cover, and the die pressing opening corresponds to the connecting rod die. And redundant powder raw materials generated by pressing are located in the shielding cover all the time, and it is avoided that metal raw material powder is accumulated on the table top and exposed in the air, and health and safety of workers in a production workshop are affected.

Description

Technical Field

[0001] The utility model relates to the technical field of connecting rod manufacturing and processing, and particularly relates to a powder metallurgy mold for a connecting rod. Background Art

[0002] The connecting rod is one of the main transmission mechanisms of an automobile engine. It connects the piston and the crankshaft, and transmits the expanding gas pressure acting on the top of the piston to the crankshaft, so that the reciprocating linear motion of the piston is reversibly converted into the rotary motion of the crankshaft.

[0003] Large connecting rods are usually made by forging and molding after heating an integral iron blank, and small connecting rods are generally made by powder pressing and then calcining and solidifying. The existing powder forming molds for connecting rods are usually assembled on a workbench, and the feeding is carried out through an external pushing table, and the connecting rods pressed and ejected from the mold are pushed out. During the use process, a lot of powder raw materials will accumulate on the workbench. Although the bottom of the existing pushing table is equipped with a dust-sweeping cloth or sponge block, it is still impossible to avoid dust accumulation on the workbench, and some of the dust is metal powder, which is greatly harmful to the human body. Content of the Utility Model

[0004] The utility model provides a powder metallurgy mold for a connecting rod, which has the advantage of restricting the powder generated by pressing from being exposed to the working environment, so as to solve the problem that the raw material powder of the existing mold is directly exposed outside and affects the health of personnel during use.

[0005] To achieve the above object, the utility model provides the following technical scheme: A powder metallurgy mold for a connecting rod, including an upper mold and a lower mold, further including a shielding cover and a powder concentrating member, wherein:

[0006] The lower mold includes a template, and a connecting rod mold is embedded in the template;

[0007] The shielding cover is fixed at the upper end of the template and wraps the connecting rod mold therein. A molding port matching the upper mold is provided at the top of the shielding cover, and the molding port corresponds to the connecting rod mold.

[0008] As a preferred technical scheme of the utility model, operation ports are symmetrically arranged at both bottoms of the shielding cover, and a curtain is installed in the operation ports.

[0009] As a preferred technical scheme of the utility model, the top of the curtain is fixedly connected to the inner wall of the operation port, and the curtain is made of synthetic rubber.

[0010] As a preferred technical scheme of the utility model, observation ports are symmetrically arranged on the outer wall of the shielding cover, and a transparent observation window is installed in the observation ports.

[0011] As a preferred technical solution of the present utility model, an arc chamfer is provided outward at the upper opening of the molding port.

[0012] As a preferred technical solution of the present utility model, the powder concentration member wraps the powder bin, the powder bin is fixed at the bottom of the template, the template is provided with a plurality of penetrating powder leakage ports, and discharge ports are symmetrically provided at the bottom of the powder bin.

[0013] As a preferred technical solution of the present utility model, the template is provided with a mounting flange, the powder bin is provided with a connecting flange that cooperates with the mounting flange, and corresponding ejection holes are provided at the bottom of the connecting rod die and the bottom of the powder bin.

[0014] Compared with the prior art, the present utility model provides a powder metallurgy mold for a connecting rod, having the following beneficial effects:

[0015] 1. During the process of powder pressing and forming the connecting rod by the present utility model through the shielding cover, the excess powder raw materials generated during pressing are always located inside the shielding cover, avoiding the accumulation of metal raw material powder on the workbench and exposure to the air, which affects the health and safety of the workers in the production workshop.

[0016] 2. The present utility model can centrally collect the corresponding dust in the powder bin through the powder bin, and the powder entering the powder bin can be uniformly discharged from the discharge port, thereby recycling the raw material powder and avoiding waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a schematic diagram of the structure of the shielding cover of the present utility model;

[0019] Figure 3 is a schematic diagram of the structure of the lower die of the present utility model;

[0020] Figure 4 is a sectional view of the lower die and the powder bin of the present utility model;

[0021] Figure 5 is a sectional view of the interior of the powder bin of the present utility model;

[0022] Figure 6 is a schematic diagram of the connecting rod blank formed by the mold pressing of the present utility model.

[0023] In the figure: 1. Upper die; 2. Lower die; 21. Template; 22. Connecting rod die; 221. Ejection hole; 23. Mounting flange; 24. Powder leakage port; 3. Shielding cover; 31. Molding port; 32. Operation port; 33. Curtain; 34. Observation port; 35. Observation window; 4. Powder concentration member; 41. Powder bin; 42. Connecting flange; 43. Discharge port. Detailed implementation mode

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment 1

[0025] Please refer to Figures 1-6 , the present invention discloses a powder metallurgy mold for a connecting rod, including an upper mold 1 and a lower mold 2, and further including a shielding cover 3 and a powder concentrating member 4, wherein:

[0026] The lower mold 2 includes a template 21, and a connecting rod mold 22 is embedded in the template 21;

[0027] The shielding cover 3 is fixed at the upper end of the template 21 and wraps the connecting rod mold 22 therein. A molding port 31 that fits with the upper mold 1 is provided at the top of the shielding cover 3. The length of the upper mold 1 is greater than the sum of the height of the shielding cover 3 and the depth of the connecting rod mold 22, and the molding port 31 corresponds to the connecting rod mold 22.

[0028] Please refer to the attached Figures 1-2 , both bottom sides of the shielding cover 3 are symmetrically provided with operation ports 32, and a curtain 33 is installed in the operation ports 32. Specifically, the operation ports 32 are used for the ejection of the connecting rod and the entry of an external pushing table. The top of the curtain 33 is fixedly connected to the inner wall of the operation port 32. The curtain 33 is made of synthetic rubber. The curtain is a flexible rubber, which can be easily pushed open, and generally has a good sealing effect to prevent powder raw materials from floating out. Through holes 34 are symmetrically provided on the outer wall of the shielding cover 3, and a transparent observation window 35 is installed in the through holes 34. The situation inside the shielding cover 3 of the connecting rod can be viewed through the observation window 35. An arc chamfer is provided outward at the upper opening of the molding port 31. Further, the arc chamfer can enable the upper mold 1 to be stably inserted into the molding port 31. Embodiment 2

[0029] Based on the above Embodiment 1, please refer to the attached Figure 4 、 Figure 5 , the powder concentrating member 4 wraps a powder bin 41. The powder bin 41 is fixed at the bottom of the template 21. The template 21 is provided with a plurality of through powder leakage holes 24. Discharge ports 43 are symmetrically provided at the bottom of the powder bin 41. The template 21 is provided with a mounting flange 23, and the powder bin 41 is provided with a connecting flange 42 that cooperates with the mounting flange 23. Corresponding ejection holes 221 are provided at the bottom of the connecting rod mold 22 and the bottom of the powder bin 41;

[0030] In this embodiment, the surplus powder raw materials in the shielding cover 3 enter the powder bin 41 from the powder leakage port 24 and are then discharged uniformly from the discharge port 43 for recycling. The powder bin 41 and the ejection hole 221 at the bottom of the connecting rod die 22 can pass through the ejector rod to eject the completed connecting rod after pressing.

[0031] The working principle and usage process of the present utility model: When the connecting rod is pressed and formed, the external pushing table slides into the shielding cover 3 from the operation port 32 on one side to feed powder into the lower die tooling. After the feeding is completed, the upper die 1 moves downward under the drive of the hydraulic equipment, passes through the molding port 31 and enters the shielding cover 3, and then continues to move downward into the connecting rod die 22 to press the powder into shape. After pressing is completed, the ejector rod in the ejection hole 221 ejects the pressed connecting rod blank out of the connecting rod die 22. At this time, the external pushing table slides into the shielding cover 3 from the operation port 32 on one side, ejects the connecting rod from the operation port 32 on the other side, and simultaneously feeds powder. During this process, the excess powder raw materials enter the powder bin 41 from the powder leakage port 24 and are discharged from the discharge port 43 at the bottom of the powder bin 41. A container can be placed at the discharge port 43 to recycle the powder.

Claims

1. A powder metallurgy mold for a connecting rod, comprising an upper mold (1) and a lower mold (2), characterized in that, It also includes a shielding cover (3) and a powder concentrating member (4), wherein: The lower die (2) includes a template (21), and a connecting rod die (22) is embedded in the template (21); The shielding cover (3) is fixed to the upper end of the template (21) and encloses the connecting rod die (22). A molding opening (31) that fits with the upper die (1) is provided at the top of the shielding cover (3), and the molding opening (31) corresponds to the connecting rod die (22).

2. The powder metallurgy mold for a connecting rod according to claim 1, characterized in that: Operation openings (32) are symmetrically provided at both bottom sides of the shielding cover (3), and a curtain (33) is installed in the operation openings (32).

3. The powder metallurgy mold for a connecting rod according to claim 2, characterized in that: The top of the curtain (33) is fixedly connected to the inner wall of the operation opening (32), and the curtain (33) is made of synthetic rubber.

4. The powder metallurgy die for a connecting rod according to claim 3, characterized in that: Observation openings (34) penetrating through are symmetrically provided on the outer wall of the shielding cover (3), and transparent observation windows (35) are installed in the observation openings (34).

5. The powder metallurgy mold for a connecting rod according to claim 2, characterized in that: An arc chamfer is provided outward at the upper opening of the molding opening (31).

6. The powder metallurgy mold for a connecting rod according to claim 5, characterized in that: The powder concentrating member (4) encloses a powder bin (41). The powder bin (41) is fixed to the bottom of the template (21). A plurality of powder leakage openings (24) penetrating through are provided on the template (21), and discharge ports (43) are symmetrically provided at the bottom of the powder bin (41).

7. A powder metallurgy mold for a connecting rod according to claim 6, characterized in that: An installation flange (23) is installed on the template (21), a connection flange (42) that cooperates with the installation flange (23) is installed on the powder bin (41), and ejection holes (221) corresponding to each other are provided at the bottom of the connecting rod die (22) and the bottom of the powder bin (41).

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