Powder metallurgy lateral hole forming device and forming method

Abstract

The invention relates to a powder metallurgy lateral hole forming device and method, the powder metallurgy lateral hole forming device comprises a middle die, the middle die is provided with a forming hole matched with the appearance of a product, the upper side and the lower side of the forming hole are provided with an upper profile rod and a lower profile rod respectively, the upper profile rod moves downwards during forming, the lower profile rod moves upwards during forming, and a horizontal hole is formed in the side edge of the middle die; the horizontal holes and the forming holes are distributed in a crossed mode, the middle rods corresponding to the lateral holes of the product are arranged in the horizontal holes and penetrate through the forming holes, the middle rods moving horizontally are arranged to serve as mold cores for forming the lateral holes, the lateral holes can be directly formed in the pressing process, the upper forming rod moves downwards, the lower forming rod moves upwards, and therefore in the forming process, the forming efficiency is greatly improved. The upper side and the lower side of the middle rod have certain pressure, and the middle rod cannot be bent and damaged under the condition that the upper pressure and the lower pressure are controlled to be the same, so that the stability of the size of a lateral hole of a product is ensured, the lateral hole does not need to be formed independently subsequently, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of powder metallurgy, and in particular to a powder metallurgy lateral hole forming device and a forming method. Background Art

[0002] In the processing and production of products, lateral holes refer to holes on the side of the product. During the production process, the product is generally processed as a whole first, and then the lateral holes are processed by drilling. At this time, multiple processes will be required, and for cylindrical products, it is more troublesome to fix the lateral holes during drilling, which affects the processing efficiency. Summary of the invention

[0003] Based on this, it is necessary to provide a powder metallurgy lateral hole forming device and forming method to address the problems in the prior art.

[0004] A powder metallurgy lateral hole forming device, characterized in that it includes a middle die, the middle die is provided with a forming hole adapted to the product shape, the upper side and the lower side of the forming hole are respectively provided with an upper mold rod and a lower mold rod, during forming, the upper mold rod moves downward and the lower mold rod moves upward, the side of the middle die is provided with a horizontal hole, the horizontal hole is cross-distributed with the forming hole, a middle rod corresponding to the product lateral hole is provided in the horizontal hole, and the middle rod is inserted into the forming hole.

[0005] In one embodiment, the axis of the middle rod is located in the middle of the product, and the height of the forming hole is greater than the height of the product.

[0006] In one embodiment, the middle mold includes a fixing plate, a positioning hole is provided in the middle of the fixing plate, a female mold is provided in the positioning hole, and the molding hole is arranged in the middle of the female mold.

[0007] In one of the embodiments, the positioning hole is provided with a positioning step, the female mold is arranged on the upper side of the positioning step, and a pressing ring is provided on the upper side of the female mold, and the pressing ring is fixed to the fixing plate, thereby fixing the female mold in the positioning hole.

[0008] In one of the embodiments, the horizontal hole includes an inner hole that crosses the female mold, and one side of the fixing plate is provided with an outer hole corresponding to the inner control, and the outer hole and the inner hole form a horizontal hole.

[0009] In one of the embodiments, a transverse driving structure is provided on the outer side of the middle mold, and the transverse driving structure includes a transverse cylinder, and a piston rod of the transverse cylinder is connected to a connecting plate, and the connecting plate is fixed to the middle rod.

[0010] A powder metallurgy lateral hole forming method, using the above-mentioned forming device, the forming method comprises: Control the movement of the middle rod so that the middle rod passes through the forming hole; Control the lower mold rod to move upward until the lower side of the molding hole is sealed. Add the raw materials into the forming hole, Control the upper mold rod to move downward so that the distance between the upper mold rod and the center rod axis is the same as the distance between the lower mold rod and the center rod axis. Finished product forming includes controlling the upper mold rod to move downward and the lower mold rod to move upward, wherein the speed and pressure of the upper mold rod moving downward and the lower mold rod moving upward are the same. Take out the formed product.

[0011] In one of the embodiments, the middle rod passes through the forming hole, which means that the middle rod passes through the horizontal hole and passes through the forming hole, and the end of the middle rod enters the horizontal hole on the other side of the forming hole.

[0012] In one of the embodiments, the product is removed after molding, including keeping the upper mold rod and the lower mold rod in position, controlling the middle rod to move outward and move out from the lateral hole of the molded product, and then controlling the upper mold rod and the lower mold rod to move upward or the upper mold rod and the lower mold rod to move downward, so that the molded product is moved out of the molding hole.

[0013] In one embodiment, when the product is taken out after molding and the upper mold rod and the lower mold rod are in fixed position, the upper mold rod has downward pressure and the lower mold rod has upward pressure to clamp the molded product in the position between the upper mold rod and the lower mold rod; or the upper mold rod and the lower mold rod are fixed.

[0014] The above-mentioned powder metallurgy lateral hole forming device and forming method, during the processing process, by setting a horizontally movable middle rod as the mold core for lateral hole forming, the lateral hole can be directly formed during the pressing process. At this time, the upper mold rod moves downward and the lower mold rod moves upward. In this way, during the forming process, there is a certain pressure on the upper and lower sides of the middle rod. When the upper and lower pressures are controlled to be the same, the middle rod will not bend and be damaged, thereby ensuring the stability of the size of the lateral hole of the product. There is no need to open the lateral hole separately later, thereby improving production efficiency and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the powder metallurgy lateral hole forming device of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the powder metallurgy lateral hole forming device of the present invention; Among them, 1. middle mold; 11. fixed plate; 12. mother mold; 13. pressure ring; 2. forming hole; 3. upper mold rod; 4. lower mold rod; 5. horizontal hole; 6. middle rod; 7. lateral drive structure; 71. lateral cylinder; 72. connecting plate. DETAILED DESCRIPTION

[0016] 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.

[0017] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only."

[0018] 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.

[0019] like Figure 1 and Figure 2 As shown, a powder metallurgy lateral hole forming device is characterized in that it includes a middle die 1, the middle die 1 is provided with a forming hole 2 adapted to the product shape, the upper side and the lower side of the forming hole 2 are respectively provided with an upper mold rod 3 and a lower mold rod 4, during forming, the upper mold rod 3 moves downward, and the lower mold rod 4 moves upward, the side of the middle die 1 is provided with a horizontal hole 5, the horizontal hole 5 is cross-distributed with the forming hole 2, and a middle rod 6 corresponding to the product lateral hole is provided in the horizontal hole 5, and the middle rod 6 is penetrated into the forming hole 2.

[0020] During the processing, by setting a horizontally movable middle rod 6 as a mold core for forming the lateral holes, the lateral holes can be directly formed during the pressing process. At this time, the upper mold rod 3 moves downward and the lower mold rod 4 moves upward. In this way, during the forming process, there is a certain pressure on the upper and lower sides of the middle rod 6. When the upper and lower pressures are controlled to be the same, the middle rod 6 will not bend or be damaged, thereby ensuring the stability of the size of the lateral holes of the product. There is no need to open the lateral holes separately later, thereby improving production efficiency and reducing production costs.

[0021] At this time, in order to ensure that the pressure on the upper and lower sides of the middle rod 6 is consistent during the pressing process, in this embodiment, the axis of the middle rod 6 is located in the middle of the product, and the height of the forming hole 2 is greater than the product height. The axis of the middle rod 6 is located in the middle of the product, which means that the lateral hole is in the middle of the product. In this way, during the product forming process, the upper mold rod 3 and the lower mold rod 4 are at the same distance from the middle rod 6. When they move at the same speed and pressure in the future, the pressure on the upper and lower sides of the middle rod 6 is the same and in opposite directions, and can offset each other. In this way, the middle rod 6 is not subjected to stress as a whole and will not break. At the same time, the height of the forming hole 2 is greater than the product height. In this way, the lower mold rod 4 can first move to the inside of the forming hole 2, and when the powder raw material enters the forming hole 2, it acts as a lower baffle to prevent the powder raw material from leaking out from the lower side of the forming hole 2.

[0022] The forming hole 2 is used for forming. In this embodiment, the middle mold 1 includes a fixing plate 11, a positioning hole is provided in the middle of the fixing plate 11, a female mold 12 is provided in the positioning hole, and the forming hole 2 is arranged in the middle of the female mold 12. The female mold 12 can be made of a material with better strength, so that the overall cost can be reduced.

[0023] After the female mold 12 is set, in order to fix the female mold 12 to the middle mold 1, at this time, the positioning hole is provided with a positioning step, the female mold 12 is set on the upper side of the positioning step, and a pressure ring 13 is provided on the upper side of the female mold 12. The pressure ring 13 is fixed to the fixed plate 11, so that the female mold 12 is fixed in the positioning hole. The fixed plate 11 of the middle mold 1 is provided with a positioning hole, and a positioning step is provided in the positioning hole, so that it can be used to carry the female mold 12. A pressure ring 13 is provided on the upper side of the female mold 12, and the pressure ring 13 is larger than the outer diameter of the female mold 12, so that the female mold 12 can be pressed tightly in the positioning hole, and then the pressure ring 13 and the fixed plate 11 are fixed by fasteners, so as to complete the fixation of the female mold 12 and the fixed plate 11 of the middle mold 1.

[0024] At this time, since both the mother mold 12 and the middle mold 1 fixing plate 11 are provided with horizontal holes 5, they need to be aligned after assembly to form a whole. Therefore, a positioning structure, such as a positioning protrusion, can be provided at the position of the positioning hole of the middle mold 1 fixing plate 11, and the mother mold 12 is provided with a corresponding positioning groove, or the mother mold 12 is set to a structure of a specific shape, that is, positioning is performed through the side of the mother mold 12.

[0025] The horizontal hole 5 is used for the middle rod 6 to pass through and move. In this embodiment, the horizontal hole 5 includes an inner hole that crosses the mother mold 12, and one side of the fixed plate 11 is provided with an outer hole corresponding to the inner hole, and the outer hole and the inner hole form a horizontal hole 5. At this time, the horizontal hole 5 completely penetrates the mother mold 12, so that the middle rod 6 can be completely installed at the position of the horizontal hole 5 at the position of the mother mold 12. During the molding process, both ends of the middle rod 6 can be supported by the horizontal hole 5 of the mother mold 12, thereby ensuring that the middle rod 6 will not slow down during the product pressing and molding, thereby ensuring the accuracy of the lateral hole.

[0026] After molding, the middle rod 6 needs to be taken out, so during the production process, the middle rod 6 needs to move back and forth. In this embodiment, a transverse driving structure 7 is provided on the outer side of the middle mold 1, and the transverse driving structure 7 includes a transverse cylinder 71, and the piston rod of the transverse cylinder 71 is connected to a connecting plate 72, and the connecting plate 72 is fixed to the middle rod 6. Under the action of the transverse cylinder 71, the lateral movement of the middle rod 6 can be controlled by the connecting plate 72.

[0027] A powder metallurgy lateral hole forming method, using the above-mentioned forming device, the forming method comprises: Control the movement of the middle rod 6 so that the middle rod 6 passes through the forming hole 2; Control the lower mold rod 4 to move upward until the lower side of the molding hole 2 is sealed. Add the raw material into the forming hole 2, Control the upper mold rod 3 to move downward so that the distance between the upper mold rod 3 and the axis of the middle rod 6 is the same as the distance between the lower mold rod 4 and the axis of the middle rod 6. Finished product forming includes controlling the upper mold rod 3 to move downward and the lower mold rod 4 to move upward, wherein the speed and pressure value of the upper mold rod 3 moving downward and the lower mold rod 4 moving upward are the same. Take out the formed product.

[0028] At this time, the above steps involve controlling the movement of the middle rod 6 so that the middle rod 6 passes through the forming hole 2, and controlling the lower mold rod 4 to move upward to seal the lower side of the forming hole 2. The order of these two steps can be adjusted according to actual needs. Before adding the raw materials, it is necessary to move the lower mold rod 4 upward to seal the lower side of the forming hole 2 to prevent the raw material powder from falling out from the lower side of the forming hole 2.

[0029] After the raw material is added to the forming hole 2, it is necessary to first control the upper mold rod 3 to move downward so that the distance between the upper mold rod 3 and the axis of the middle rod 6 is the same as the distance between the lower mold rod 4 and the axis of the middle rod 6. In this way, in the initial stage, the spacing between the middle rod 6 and the upper mold rod 3 and the lower mold rod 4 is the same. Subsequently, the speed and pressure of the upper mold rod 3 moving downward and the lower mold rod 4 moving upward are kept the same. In this way, during the forming process, there is a certain pressure on the upper and lower sides of the middle rod 6. When the upper and lower pressures are controlled to be the same, the middle rod 6 will not be bent and damaged, thereby ensuring the stability of the size of the lateral holes of the product. There is no need to open the lateral holes separately later, thereby improving production efficiency and reducing production costs.

[0030] In order to prevent the middle rod 6 from being easily broken after being subjected to pressure from the upper and lower sides, the two ends of the middle rod 6 need to form a stable support. Therefore, in this embodiment, the middle rod 6 passes through the forming hole 2, which means that the middle rod 6 passes through the horizontal hole 5 and passes through the forming hole 2, and the end of the middle rod 6 enters the horizontal hole 5 on the other side of the forming hole 2. At this time, the horizontal hole 5 crosses the forming hole 2 and enters the middle mold 1, so that the horizontal hole 5 is divided into two sections under the action of the forming hole 2, which are respectively located on both sides of the forming hole 2. In this way, after the middle rod 6 is inserted into the horizontal hole 5, it passes through the position of the forming hole 2 and enters the horizontal hole 5 on the other side. Therefore, both ends of the middle rod 6 are in the horizontal hole 5, thereby forming a better support for the middle rod 6.

[0031] After the product is formed, when the product needs to be taken out, in this embodiment, the taking out of the formed product includes keeping the upper mold rod 3 and the lower mold rod 4 in position, controlling the middle rod 6 to move outward and move out from the lateral hole of the formed product, and then controlling the upper mold rod 3 and the lower mold rod 4 to move upward or the upper mold rod 3 and the lower mold rod 4 to move downward, so that the formed product is moved out of the forming hole 2. That is, the middle rod 6 needs to be taken out from the lateral hole position of the product first, and then the product is taken out by controlling the movement of the upper mold rod 3 and the lower mold rod 4. At this time, the formed product can be moved out by simultaneously controlling the upper mold rod 3 and the lower mold rod 4 to move upward, or by simultaneously controlling the upper mold rod 3 and the lower mold rod 4 to move downward.

[0032] In the process of removing the molded product, when the upper mold rod 3 and the lower mold rod 4 are in a fixed position, the upper mold rod 3 has a downward pressure, and the lower mold rod 4 has an upward pressure, so that the molded product is clamped at the position between the upper mold rod 3 and the lower mold rod 4; or the upper mold rod 3 and the lower mold rod 4 are fixed. That is, in the process of removing the middle rod 6, the upper mold rod 3 and the lower mold rod 4 need to keep their positions unchanged. At this time, the upper mold rod 3 and the lower mold rod 4 can not apply external force to the molded product, but can apply external force to the molded product. When applying external force to the molded product, the upper mold rod 3 acts on the molded product downward, and the lower mold rod 4 acts on the molded product upward. At this time, the force is small, which is mainly used to fix the molded product, which is equivalent to clamping the molded product at the upper and lower positions, and then the middle rod 6 is removed to prevent the middle rod 6 from pulling the product horizontally and damaging the molded product during the removal process, thereby improving the molding quality of the molded product.

[0033] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] 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 powder metallurgy lateral hole forming device, characterized in that: The invention comprises a middle die, wherein the middle die is provided with a forming hole adapted to the shape of the product, an upper mold rod and a lower mold rod are respectively provided on the upper side and the lower side of the forming hole, the upper mold rod moves downward and the lower mold rod moves upward during forming, a horizontal hole is provided on the side of the middle die, the horizontal hole is cross-distributed with the forming hole, a middle rod corresponding to the lateral hole of the product is provided in the horizontal hole, and the middle rod is passed through the forming hole.

2. The powder metallurgy lateral hole forming device according to claim 1, characterized in that: The axis of the middle rod is located in the middle of the product, and the height of the forming hole is greater than the height of the product.

3. The powder metallurgy lateral hole forming device according to claim 2, characterized in that: The middle mold comprises a fixing plate, a positioning hole is arranged in the middle of the fixing plate, a female mold is arranged in the positioning hole, and the forming hole is arranged in the middle of the female mold.

4. The powder metallurgy lateral hole forming device according to claim 3, characterized in that: The positioning hole is provided with a positioning step, the female mold is arranged on the upper side of the positioning step, and a pressing ring is provided on the upper side of the female mold. The pressing ring is fixed to the fixing plate, so as to fix the female mold in the positioning hole.

5. The powder metallurgy lateral hole forming device according to claim 4, characterized in that: The horizontal hole comprises an inner hole that crosses the female mold, and one side of the fixing plate is provided with an outer hole corresponding to the inner mold, and the outer hole and the inner hole form a horizontal hole.

6. The powder metallurgy lateral hole forming device according to any one of claims 1 to 5, characterized in that: A transverse driving structure is arranged outside the middle mold, and the transverse driving structure comprises a transverse cylinder, a piston rod of the transverse cylinder is connected with a connecting plate, and the connecting plate is fixed to the middle rod.

7. A powder metallurgy lateral hole forming method, characterized in that: Using the molding device according to any one of claims 1 to 6, the molding method comprises: Control the movement of the middle rod so that the middle rod passes through the forming hole; Control the lower mold rod to move upward until the lower side of the molding hole is sealed. Add the raw materials into the forming hole, Control the upper mold rod to move downward so that the distance between the upper mold rod and the center rod axis is the same as the distance between the lower mold rod and the center rod axis. Finished product forming includes controlling the upper mold rod to move downward and the lower mold rod to move upward, wherein the speed and pressure of the upper mold rod moving downward and the lower mold rod moving upward are the same. Take out the formed product.

8. The powder metallurgy lateral hole forming method according to claim 7, characterized in that: The middle rod passes through the forming hole, which means that the middle rod passes through the horizontal hole and passes through the forming hole, and the end of the middle rod enters the horizontal hole on the other side of the forming hole.

9. The powder metallurgy lateral hole forming method according to claim 7, characterized in that: The product is taken out after molding, including keeping the upper mold rod and the lower mold rod in position, controlling the middle rod to move outward and move out from the lateral hole of the molded product, and then controlling the upper mold rod and the lower mold rod to move upward or the upper mold rod and the lower mold rod to move downward, so that the molded product is moved out of the molding hole.

10. The powder metallurgy lateral hole forming method according to claim 9, characterized in that: When the product is taken out after molding and the upper mold rod and the lower mold rod are in fixed position, the upper mold rod has downward pressure and the lower mold rod has upward pressure to clamp the molded product between the upper mold rod and the lower mold rod; or the upper mold rod and the lower mold rod are fixed.

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