Tungsten steel bar vertical pressing die and machining method

Abstract

The invention discloses a tungsten steel bar vertical pressing die which comprises an upper die body, a middle die body and a lower die body, a middle die body cavity is formed in the middle die body in the vertical direction, the upper die body and the lower die body are contained at the two ends of the middle die body cavity respectively and can slide in the vertical direction of the middle die body cavity respectively, and a tungsten steel bar forming cavity is formed in the middle die body cavity; a middle mold cavity is formed in the middle mold in the vertical direction, tungsten steel bar powder is filled into the middle mold cavity, the mold upper mold is inserted into the middle mold cavity till the mold upper mold abuts against the tungsten steel bar powder, preset pressure is applied to the mold upper mold and the mold lower mold for preset pressure maintaining time, so that the tungsten steel bar powder is pressed and formed into a tungsten steel bar, and the mold upper mold is moved out of the middle mold cavity; and then the middle mold is moved downwards, so that the lower mold of the mold moves upwards relative to the middle mold to push the tungsten steel bar out of a mold cavity of the middle mold, the tungsten steel bar is pressed and formed in the vertical direction, the two sides of the tungsten steel bar are not provided with joint lines, the joint lines do not need to be polished, and meanwhile waste of tungsten steel bar powder is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of tungsten steel bar processing, and in particular to a tungsten steel bar vertical pressing die and a processing method. Background Art

[0002] Powder metallurgy is a process technology that produces metal powder or uses metal powder (or a mixture of metal powder and non-metal powder) as raw material, and then forms and sinters it to produce metal materials, composite materials and various types of products. Powder metallurgy is similar to the production of ceramics, both of which belong to powder sintering technology. Therefore, a series of new powder metallurgy technologies can also be used to prepare ceramic materials. Due to the advantages of powder metallurgy technology, it has become the key to solving new material problems and plays a vital role in the development of new materials.

[0003] The current tungsten steel rod is also made of tungsten steel rod powder. Figure 7 As shown in the figure, a horizontal mold is usually used for pressing, that is, the tungsten steel rod powder is placed in the cavity of the master mold, and then the tungsten steel rod powder is pressed into a tungsten steel rod with a horizontal structure by closing the upper mold and the lower mold. However, after the tungsten steel rod powder is pressed by the upper mold and the lower mold, two mold lines will be formed on both sides of the tungsten steel rod. After the two mold lines are formed, they need to be ground off with a centerless grinder before entering the next process, which increases the work steps and reduces the processing efficiency. At the same time, grinding off the two mold lines every time also wastes the tungsten steel rod powder and increases the processing cost. Summary of the invention

[0004] Based on this, it is necessary to provide a tungsten steel rod vertical pressing die, which can effectively avoid the appearance of the die line on the tungsten steel rod, reduce processing costs, and improve work efficiency.

[0005] A tungsten steel rod vertical pressing die comprises an upper die, a middle die and a lower die, wherein the middle die has a middle die cavity in the vertical direction, the upper die and the lower die are respectively accommodated at two ends of the middle die cavity and can slide along the vertical direction of the middle die cavity, thereby forming a tungsten steel rod forming cavity in the middle die cavity.

[0006] In one embodiment, the upper mold has a first pressing groove at one end thereof close to the middle mold cavity.

[0007] In one embodiment, the inner edge of the first groove is a curved surface structure.

[0008] In one embodiment, the lower mold has a second groove at one end thereof close to the middle mold cavity.

[0009] In one embodiment, one side of the middle mold has a slope structure.

[0010] In one embodiment, the tungsten steel rod vertical pressing mold further includes a cushion block, which is detachably mounted on the bottom surface of the middle mold, and a cavity is provided at the center of the cushion block, and the cavity is vertically aligned with and connected to the cavity of the middle mold.

[0011] In one embodiment, the middle mold cavity is made of alloy material.

[0012] A method for processing a tungsten steel rod, applied to the tungsten steel rod vertical pressing die, the processing method comprising: Move the middle mold upward by a preset distance; Filling the middle mold cavity with tungsten steel rod powder; Inserting the upper mold into the middle mold cavity until it contacts the tungsten steel rod powder; Applying a preset pressure to the upper mold and the lower mold for a preset holding time to press the tungsten steel rod powder into a tungsten steel rod; The upper mold is moved out of the middle mold cavity, and then the middle mold is moved downward, so that the lower mold moves upward relative to the middle mold to push the tungsten steel rod out of the middle mold cavity to obtain a tungsten steel rod.

[0013] In one embodiment, the step of filling the middle mold cavity with tungsten steel rod powder includes: The tungsten steel rod powder of a preset mass is injected into the middle mold cavity through an extrusion molding machine.

[0014] In one embodiment, applying a preset pressure to the upper mold and the lower mold for a preset holding time includes: A pressure forming machine is used to simultaneously apply a preset pressure value to the upper mold and the lower mold according to a preset program, and the preset holding time is: 5S-30S.

[0015] The above-mentioned tungsten steel rod vertical pressing mold is arranged by the cooperation of the mold upper mold, the middle mold and the mold lower mold. The middle mold has a middle mold cavity in the vertical direction. Tungsten steel rod powder is filled into the middle mold cavity, and the mold upper mold is inserted into the middle mold cavity until it abuts against the tungsten steel rod powder. A preset pressure is applied to the mold upper mold and the mold lower mold for a preset holding time to press the tungsten steel rod powder into a tungsten steel rod. The mold upper mold is moved out of the middle mold cavity, and then the middle mold is moved downward so that the mold lower mold moves upward relative to the middle mold and pushes the tungsten steel rod out of the middle mold cavity, so that the tungsten steel rod is pressed in the vertical direction. There is no parting line on both sides of the tungsten steel rod, and there is no need to grind the parting line, which shortens the processing steps and also avoids the waste of tungsten steel rod powder, saving processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of the explosion structure of the tungsten steel rod vertical pressing die according to one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the assembly structure of a tungsten steel rod vertical pressing die according to an embodiment of the present invention; Figure 3 for Figure 1 A schematic cross-sectional view of a tungsten steel rod vertical pressing die according to an embodiment of the present invention; Figure 4 for Figure 1 A schematic diagram of the upper mold structure of a tungsten steel rod vertical pressing mold according to an embodiment of the present invention; Figure 5 for Figure 1 A schematic diagram of the middle mold structure of a tungsten steel rod vertical pressing mold according to an embodiment of the present invention; Figure 6 for Figure 1 A schematic structural diagram of a lower mold of a tungsten steel rod vertical pressing mold according to an embodiment of the present invention; Figure 7 It is a structural schematic diagram of a tungsten steel rod horizontal pressing die in the prior art; Figure 8 for Figure 1 A schematic flow chart of a method for processing a tungsten steel rod of a tungsten steel rod vertical pressing die according to an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0018] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. On the contrary, when an element is said to be "directly" connected to another element, there is no intermediate element.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0020] like Figure 1 , Figure 2 and Figure 3As shown, a tungsten steel rod vertical pressing mold includes a mold upper mold 1, a middle mold 2 and a mold lower mold 3. The middle mold 2 has a middle mold cavity 21 in the vertical direction. The mold upper mold 1 and the mold lower mold 3 are respectively accommodated at two ends of the middle mold cavity 21 and can slide along the vertical direction of the middle mold cavity 21, respectively, to form a tungsten steel rod forming cavity 4 in the middle mold cavity 21.

[0021] A through hole 211 is provided at the center of the middle mold cavity 21. When the tungsten steel rod is pressed, the tungsten steel rod powder is loaded into the through hole 211. The mold lower mold 3 is embedded in the bottom of the through hole 211 of the middle mold cavity 21 and cannot be easily removed from the through hole 211 to prevent the tungsten steel rod powder from falling out of the through hole 211 after the tungsten steel rod powder is loaded into the through hole 211. The mold upper mold 1 is embedded in the through hole 211 from the top of the through hole 211 of the middle mold cavity 21. When the tungsten steel rod powder needs to be added, the mold upper mold 1 is removed from the through hole 211 of the middle mold cavity 21. When the tungsten steel rod powder needs to be pressed, the mold upper mold 1 is inserted into the through hole 211 from the top of the through hole 211 of the middle mold cavity 21, and cooperates with the mold lower mold 3 to press and mold the tungsten steel rod powder in the through hole 211. The movement of the mold upper mold 1 and the mold lower mold 3 is generally controlled by a pressure molding machine.

[0022] In this way, the tungsten steel rod vertical pressing mold is provided with a middle mold cavity 21 in the vertical direction of the middle mold 2 through the matching arrangement of the mold upper mold 1, the middle mold 2 and the mold lower mold 3. The middle mold 2 is filled with tungsten steel rod powder, and the mold upper mold 1 is inserted into the middle mold cavity 21 until it abuts against the tungsten steel rod powder. A preset pressure is applied to the mold upper mold 1 and the mold lower mold 3 for a preset holding time so that the tungsten steel rod powder is pressed into a tungsten steel rod 5. The mold upper mold 1 is moved out of the middle mold cavity 21, and the middle mold 2 is moved downward so that the mold lower mold 3 moves upward relative to the middle mold 2 and pushes the tungsten steel rod 5 out of the middle mold cavity 21, so that the tungsten steel rod 5 is pressed and formed in the vertical direction. There is no parting line on both sides of the tungsten steel rod 5, and there is no need to grind the parting line, which shortens the processing steps and also avoids the waste of tungsten steel rod powder, thereby saving processing costs.

[0023] like Figure 4 and Figure 6 As shown, in one embodiment, the upper mold 1 has a first pressing groove 11 at one end close to the middle mold cavity 2, and the inner edge of the first pressing groove 11 is a curved surface structure; the lower mold 3 has a second pressing groove 31 at one end close to the middle mold cavity 2.

[0024] In this way, the shape and size of the first pressing groove 11 are set according to the required shape of the top of the tungsten steel rod, and the shape and size of the second pressing groove 31 are set according to the required shape of the bottom of the tungsten steel rod. It is also possible to use the upper mold 1 with the first pressing groove 11 or the lower mold 3 with the second pressing groove 31 that are adapted to the actual needs of the top or bottom shape of the tungsten steel rod, so that the tungsten steel rod vertical pressing mold can press out tungsten steel rods 5 with different top or bottom structures, making the application range of the tungsten steel rod vertical pressing mold wider.

[0025] In one embodiment, one side of the middle mold 2 has a slope structure 22 .

[0026] In this way, the tungsten steel rod 5 is generally a cylindrical structure as a whole. After the middle mold 2 moves downward to make the lower mold 3 of the mold move upward relative to the middle mold 2 and push the tungsten steel rod 5 out of the middle mold cavity 21, the tungsten steel rod 5 falls on the plate surface of the middle mold 2 and can roll from the inclined structure 22 to the product receiving tray, which is convenient for the rapid recovery of the tungsten steel rod 5 and enter the next process.

[0027] like Figure 5 As shown, in one embodiment, the tungsten steel rod vertical pressing mold also includes a cushion block 6, which is detachably mounted on the bottom surface of the middle mold 2, and has a cavity 61 at the center thereof, and the cavity 61 is vertically aligned and connected with the middle mold cavity 21.

[0028] In this way, a through cavity hole 611 is also provided at the center of the cavity 61, and the cavity 61 is vertically aligned with and connected to the through hole 211 of the middle mold cavity 21. The setting of the pad 6 is mainly to increase the filling height of the tungsten steel rod powder. When the tungsten steel rod powder is filled, the tungsten steel rod powder can be filled into the cavity hole 611 through the through hole 211 of the middle mold cavity 21, and then through the cooperation of the mold upper mold 1 and the mold lower mold 3, a longer tungsten steel rod 5 can be pressed, which effectively expands the production range of the tungsten steel rod 5.

[0029] In one embodiment, the middle mold cavity 2 is made of alloy material.

[0030] First, the alloy material has extremely high hardness, usually reaching HRA80 or above, or even up to HRA90 or above. This high hardness enables the middle mold cavity 2 to maintain a stable shape in various harsh working environments, and is not easily deformed or damaged, thus ensuring the accuracy and efficiency of the production process.

[0031] Secondly, the alloy material has excellent wear resistance. Even under long-term, high-intensity working conditions, the middle mold cavity 2 can maintain a stable use state for a long time and is not easy to wear. This wear resistance ensures the service life of the mold, reduces the maintenance and replacement costs during the production process, and improves production efficiency.

[0032] In addition, alloy materials also have excellent high temperature resistance. In some production processes, molds need to withstand high temperature environments, such as metal smelting, injection molding, etc. Alloy materials can effectively resist high temperature corrosion and thermal stress through reasonable material ratios and heat treatment processes, maintain high strength and stability, and ensure long-term use of molds in high temperature environments.

[0033] like Figure 8 As shown, a method for processing a tungsten steel rod is applied to the tungsten steel rod vertical pressing die, and the processing method includes: S1, move the middle mold 2 upward by a preset distance; the movement of the middle mold 2 can be controlled by a mold machine tool, and the mold machine tool has a control module, and the distance of movement of the middle mold 2 can be controlled by the control module; the middle mold 2 moves upward and away from the middle mold cavity 21, so as to facilitate the addition of tungsten steel rod powder into the middle mold cavity 21; S2, filling tungsten steel rod powder into the middle mold cavity 21; S21, injecting the tungsten steel rod powder of a preset mass into the middle mold cavity 21 through an extrusion molding machine, thereby completing the addition of the tungsten steel rod powder; S3, inserting the upper mold 1 into the middle mold cavity 2 until it contacts the tungsten steel rod powder; S4, applying a preset pressure to the upper mold 1 and the lower mold 3 for a preset holding time, so that the tungsten steel rod powder is pressed into a tungsten steel rod 5; S41, using a pressure forming machine, according to a preset program, a preset pressure value is applied to the upper mold and the lower mold at the same time, and the preset holding time is: 5S-30S. The holding time can be set according to the actual size of the tungsten steel rod 5. For example, if the length of the tungsten steel rod 5 is relatively long, then the required holding time is also relatively long.

[0034] S5, the upper mold 1 is moved out of the middle mold cavity 21, and the middle mold 2 is moved downward, so that the lower mold 3 moves upward relative to the middle mold 2 and the tungsten steel rod 5 is pushed out of the middle mold cavity 21 to obtain the tungsten steel rod 5. The downward movement of the middle mold 2 is actually moving in the direction of the lower mold 3, and the movement of the middle mold 2 can be controlled by the mold machine. After the tungsten steel rod 5 is moved out of the middle mold cavity 21, it rolls down from the inclined structure 22 into the product receiving tray, and then enters the next process.

[0035] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A tungsten steel rod vertical pressing die, characterized in that: It includes an upper mold, a middle mold and a lower mold. The middle mold has a middle mold cavity in the vertical direction. The upper mold and the lower mold are respectively accommodated at two ends of the middle mold cavity and can slide along the vertical direction of the middle mold cavity, so as to form a tungsten steel rod forming cavity in the middle mold cavity.

2. A tungsten steel rod vertical pressing die according to claim 1, characterized in that: The upper mold of the mold has a first pressing groove at one end close to the middle mold cavity.

3. A tungsten steel rod vertical pressing die according to claim 2, characterized in that: The inner edge of the first groove is a curved surface structure.

4. A tungsten steel rod vertical pressing die according to claim 2, characterized in that: The lower mold of the mold has a second pressing groove at one end close to the middle mold cavity.

5. The tungsten steel rod vertical pressing die according to claim 1, characterized in that: One side of the middle mold has a slope structure.

6. The tungsten steel rod vertical pressing die according to claim 1, characterized in that: The tungsten steel rod vertical pressing mold also includes a cushion block, which is detachably mounted on the bottom surface of the middle mold. The cushion block has a cavity at the center, and the cavity is vertically aligned with and connected to the cavity of the middle mold.

7. The tungsten steel rod vertical pressing die according to claim 1, characterized in that: The middle mold cavity is made of alloy material.

8. A method for processing a tungsten steel rod, characterized in that: Applied to the tungsten steel rod vertical pressing die according to any one of claims 1 to 7, the processing method comprises: Move the middle mold upward by a preset distance; Filling the middle mold cavity with tungsten steel rod powder; Inserting the upper mold into the middle mold cavity until it contacts the tungsten steel rod powder; Applying a preset pressure to the upper mold and the lower mold for a preset holding time to press the tungsten steel rod powder into a tungsten steel rod; The upper mold is moved out of the middle mold cavity, and then the middle mold is moved downward, so that the lower mold moves upward relative to the middle mold to push the tungsten steel rod out of the middle mold cavity to obtain a tungsten steel rod.

9. The method for processing a tungsten steel rod according to claim 8, characterized in that: The step of filling the middle mold cavity with tungsten steel rod powder comprises: The tungsten steel rod powder of a preset mass is injected into the middle mold cavity through an extrusion molding machine.

10. The method for processing a tungsten steel rod according to claim 8, characterized in that: The step of applying a preset pressure to the upper mold and the lower mold for a preset holding time includes: A pressure forming machine is used to simultaneously apply a preset pressure value to the upper mold and the lower mold according to a preset program, and the preset holding time is: 5S-30S.

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