A flatness thermal shaping jig for an alloy die casting

Abstract

The utility model provides a kind of flatness hot shaping tool of alloy die casting, belong to alloy die casting shaping technical field;Including the upper die and lower die of installation in shaper, the bottom of the upper die is fixed with upper wear plate by bolt, the top of lower die is provided with lower wear base;Hot shaping, alloy die casting is placed in lower wear base, upper die drives upper wear plate to descend and press on alloy die casting.The utility model sets up upper wear plate and lower wear base, when hot shaping, alloy die casting is placed into lower wear base, upper die descends and drives upper wear plate to press on alloy die casting, while the heat generated in upper die and lower die is transferred to upper wear plate and lower wear plate to realize hot pressing to alloy die casting, when replacing, upper wear plate and lower wear base can be directly replaced alone, without replacing upper die and lower die, to effectively prevent waste.

Description

Technical Field

[0001] This utility model relates to the field of alloy die casting shaping technology, and in particular to a hot forming fixture for the flatness of alloy die castings. Background Technology

[0002] After the die casting of alloy parts is produced, in order to improve the surface flatness of the alloy die casting, the alloy die casting needs to be placed in the lower mold of the forming machine. Then, the hydraulic cylinder in the forming machine drives the upper mold to move downward. The upper mold presses on the alloy die casting. At the same time, the upper mold and the lower mold heat the alloy die casting, realizing hot pressing of the alloy die casting, thereby realizing hot forming of the alloy die casting and improving the flatness of the alloy die casting. After the hot forming is completed, the upper mold moves upward, and then the alloy die casting can be taken out from the lower mold. The upper mold and the lower mold are the hot forming fixtures for the flatness of the alloy die casting.

[0003] Common hot forming fixtures for the flatness of alloy die castings are usually made of copper. However, copper upper and lower molds have low wear resistance. During long-term repeated contact and pressure application with the alloy die casting, the contact surfaces of the upper and lower molds with the alloy die casting are prone to wear. When the wear exceeds the allowable range, it will affect the flatness accuracy of the die casting. At this time, the mold needs to be replaced. Currently, the entire upper or lower mold is often replaced as a whole. However, the actual wear only occurs in the contact area between the mold and the alloy die casting. Replacing the whole mold will result in waste. Therefore, this application provides a hot forming fixture for the flatness of alloy die castings to meet the requirements. Summary of the Invention

[0004] This utility model provides a hot forming fixture for the flatness of alloy die castings to solve the problem of waste caused by replacing the upper or lower mold as a whole.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A hot forming fixture for the flatness of an alloy die casting includes an upper mold and a lower mold installed in a forming machine. The bottom of the upper mold is fixed with an upper wear-resistant plate by bolts, and the top of the lower mold is provided with a lower wear-resistant seat. During hot forming, the alloy die casting is placed in the lower wear-resistant seat, and the upper mold drives the upper wear-resistant plate to move down and press on the alloy die casting.

[0006] Preferably, a movable locking mechanism is provided on the side of the lower wear-resistant seat. The movable locking mechanism includes an electric push rod fixed in the forming machine. A connector is fixed on the side of the lower wear-resistant seat. The connector is detachably connected to the telescopic end of the electric push rod. A bottom wear-resistant plate is fixed on the top of the lower mold. The top of the bottom wear-resistant plate and the bottom of the lower wear-resistant seat are both inclined surfaces. During hot forming, the two inclined surfaces fit together. After hot forming is completed, the electric push rod extends and drives the lower wear-resistant seat to move out from under the upper mold.

[0007] Preferably, a locking assembly is provided on the side of the lower wear-resistant seat away from the electric push rod. The locking assembly includes a U-shaped rod fixed on the side of the lower wear-resistant seat away from the electric push rod. A roller is rotatably connected to the end of the U-shaped rod. A slot is provided on the side of the lower die. During hot forming, the roller is in contact with the inclined extrusion surface at the top of the inner wall of the slot. After hot forming is completed, the roller is separated from the inclined extrusion surface at the top of the inner wall of the slot.

[0008] Preferably, a connecting plate is fixed on the side of the lower wear-resistant seat away from the electric push rod, and the connecting plate is fixedly sleeved on the U-shaped rod.

[0009] Preferably, the inner wall of the U-shaped rod is fixed with ribs.

[0010] Preferably, a number of heat-conducting strips are fixed at the bottom of the lower wear-resistant seat, and a groove is provided at the top of the bottom wear-resistant plate. During heat forming, the heat-conducting strips are in contact with the inner wall of the groove, and after heat forming, the heat-conducting strips are separated from the inner wall of the groove.

[0011] Preferably, the bottom of the heat-conducting strip has a heat-conducting surface one and a heat-conducting surface two connected in sequence, and the inclination directions of the heat-conducting surface one and the heat-conducting surface two are opposite.

[0012] Preferably, reinforcing ribs are fixed on opposite sides of the connector, and the reinforcing ribs are fixed to the side of the lower wear-resistant seat.

[0013] Compared with the prior art, this utility model has at least the following beneficial effects: In the above solution, by setting an upper wear-resistant plate and a lower wear-resistant seat, during hot forming, the alloy die casting is placed in the lower wear-resistant seat, and the upper mold moves down to drive the upper wear-resistant plate to press on the alloy die casting. At the same time, the heat generated inside the upper and lower molds is transferred to the upper and lower wear-resistant plates to achieve hot pressing of the alloy die casting. When replacing, the upper wear-resistant plate and the lower wear-resistant seat can be replaced directly without replacing the upper and lower molds, thus effectively preventing waste.

[0014] By setting an electric push rod, after the hot forming is completed, the push rod of the electric push rod extends and drives the lower wear-resistant seat forward. After the lower wear-resistant seat is moved out from under the upper mold, the alloy die casting is taken out from the lower wear-resistant seat, which greatly improves the safety of the process of taking out the alloy die casting.

[0015] By setting up a U-shaped rod and rollers, after a new alloy die-casting part is placed into the lower wear-resistant seat located in front of the lower mold, the push rod of the electric push rod shortens, causing the lower wear-resistant seat to move backward onto the bottom wear-resistant plate. The inclined surface of the lower wear-resistant seat is in close contact with the inclined surface of the bottom wear-resistant plate, increasing the contact area between the two and thus improving the heat conduction capacity at the connection point. When the two inclined surfaces are in close contact, the lower wear-resistant seat drives the rollers into the slot through the U-shaped rod. Under the squeezing action of the inclined extrusion surface at the top of the inner wall of the slot, the rollers cause the U-shaped rod to drive the front side of the lower wear-resistant seat to be in close contact with the bottom wear-resistant plate, preventing the front side of the lower wear-resistant seat from tilting up, thus ensuring a stable fit between the lower wear-resistant seat and the bottom wear-resistant plate.

[0016] By setting a heat-conducting strip, after the lower wear-resistant base and the bottom wear-resistant plate are attached, the heat-conducting surface one and the heat-conducting surface two on the heat-conducting strip are tightly attached to the inner wall of the groove of the bottom wear-resistant plate. The heat-conducting strip increases the contact area between the lower wear-resistant base and the bottom wear-resistant plate, thereby improving the heat conduction capacity between the lower wear-resistant base and the bottom wear-resistant plate. At the same time, by using the heat-conducting surface one and the heat-conducting surface two to increase the contact area between the heat-conducting strip and the inner wall of the groove, the heat conduction capacity of the heat-conducting strip itself is improved, thereby further improving the heat conduction capacity between the lower wear-resistant base and the bottom wear-resistant plate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the lower wear-resistant seat of this utility model; Figure 3 This is a three-dimensional structural diagram of the lower mold of this utility model; Figure 4 This is a cross-sectional view of the roller section of this utility model; Figure 5 This is a three-dimensional structural diagram of the bottom wear-resistant plate of this utility model; Figure 6 This is a three-dimensional structural diagram of the heat-conducting strip of this utility model.

[0018] In the diagram: 1. Upper mold; 2. Lower mold; 3. Upper wear-resistant plate; 4. Lower wear-resistant seat; 5. Movable locking mechanism; 6. Bottom wear-resistant plate; 7. Electric push rod; 8. Connector; 9. U-shaped rod; 10. Connecting plate; 11. Roller; 12. Slot; 13. Heat-conducting strip; 14. Heat-conducting surface one; 15. Heat-conducting surface two.

[0019] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to the specific structure, device and environment. According to specific needs, those skilled in the art can adjust or modify these devices and environments, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0020] The following is a detailed description of a hot-forming fixture for the flatness of alloy die-casting parts provided by this utility model, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this utility model.

[0021] like Figures 1-6 As shown, an embodiment of this utility model provides a flatness heat forming fixture for alloy die castings, including an upper mold 1 and a lower mold 2 installed in a forming machine. The bottom of the upper mold 1 is fixed with an upper wear-resistant plate 3 by bolts, and the top of the lower mold 2 is provided with a lower wear-resistant seat 4. Both the upper wear-resistant plate 3 and the lower wear-resistant seat 4 are made of aluminum alloy. Aluminum alloy has better wear resistance than copper upper mold 1 and lower mold 2, and also has better thermal conductivity. During hot forming, the alloy die casting is placed in the lower wear-resistant seat 4. The upper mold 1 drives the upper wear-resistant plate 3 to move down and press on the alloy die casting. The upper mold 1 and the lower mold 2 provide installation and support for the upper wear-resistant plate 3 and the lower wear-resistant seat 4. The upper wear-resistant plate 3 is in direct contact with the top of the alloy die casting, bearing the hot forming pressure and transferring heat, thus preventing the upper mold 1 from wearing directly. The lower wear-resistant seat 4 supports the alloy die casting and prevents the lower mold 2 from wearing. Both can be disassembled and replaced separately without replacing the upper mold 1 and the lower mold 2, reducing material waste.

[0022] like Figures 1-3 As shown in this embodiment, a movable locking mechanism 5 is provided on the side of the lower wear-resistant seat 4. The movable locking mechanism 5 includes an electric push rod 7 fixed inside the forming machine. The electric push rod 7 is powered by an external power source. The extension and retraction of the electric push rod 7 can be controlled by a control switch. A connector 8 is fixed on the side of the lower wear-resistant seat 4. The connector 8 is detachably connected to the extension and retraction end of the electric push rod 7. A round sleeve is fixed on the side of the connector 8. A screw is threaded onto the round sleeve. The push rod end of the electric push rod 7 is inserted into the round sleeve and fixed by the screw, thus realizing the connection and fixation between the push rod and the connector 8. A bottom wear-resistant plate 6 is fixed on the top of the lower mold 2. The top of the wear-resistant plate 6 and the bottom of the lower wear-resistant seat 4 are both sloped. During hot forming, the two sloped surfaces fit together. After hot forming, the electric push rod 7 extends to move the lower wear-resistant seat 4 out from under the upper mold 1. The bottom wear-resistant plate 6 is made of aluminum alloy. The electric push rod 7 moves the lower wear-resistant seat 4 through the connector 8 to realize the picking, placing and positioning of the alloy die casting. During hot forming, the lower wear-resistant seat 4 fits with the bottom wear-resistant plate 6 to achieve stable heat conduction. After hot forming, the electric push rod 7 moves the lower wear-resistant seat 4 outside the upper mold 1, making it convenient for operators to take out the alloy die casting in a safe area, improving operational safety. The bottom wear-resistant plate 6 can protect the lower mold 2 and prevent direct wear.

[0023] like Figure 2 and Figure 4 As shown in this embodiment, a locking assembly is provided on the side of the lower wear-resistant seat 4 away from the electric push rod 7. The locking assembly includes a U-shaped rod 9 fixed on the side of the lower wear-resistant seat 4 away from the electric push rod 7. A roller 11 is rotatably connected to the end of the U-shaped rod 9. A slot 12 is provided on the side of the lower mold 2. During hot forming, the roller 11 is in contact with the inclined extrusion surface at the top of the inner wall of the slot 12. After hot forming, the roller 11 is separated from the inclined extrusion surface at the top of the inner wall of the slot 12. The U-shaped rod 9 provides mounting support for the roller 11. During hot forming, the roller 11 enters the slot 12 and contacts the extrusion surface. Under the action of the inclined extrusion surface, the U-shaped rod 9 tends to move downward, thereby making the front side of the lower wear-resistant seat 4 fit tightly with the bottom wear-resistant plate 6, preventing the front side of the lower wear-resistant seat 4 from tilting up, ensuring stable position during hot forming, and avoiding forming deviation of the alloy die casting.

[0024] like Figure 4 As shown in this embodiment, a connecting plate 10 is fixed on the side of the lower wear-resistant seat 4 away from the electric push rod 7. The connecting plate 10 is fixedly sleeved on the U-shaped rod 9. The connecting plate 10 increases the connection area between the U-shaped rod 9 and the lower wear-resistant seat 4, improves the fixing strength of the U-shaped rod 9, prevents the U-shaped rod 9 from loosening or breaking when subjected to force, and ensures the stable operation of the locking assembly.

[0025] like Figure 4 As shown in this embodiment, the inner wall of the U-shaped rod 9 is fixed with a rib plate. The rib plate enhances the structural rigidity of the U-shaped rod 9, prevents the U-shaped rod 9 from bending and deforming due to the pressure of the inclined extrusion surface at the top of the inner wall of the slot 12, extends the service life of the U-shaped rod 9, and ensures that the locking assembly plays a stable positioning role for a long time.

[0026] like Figure 4 and Figure 6 As shown in this embodiment, several heat-conducting strips 13 are fixed at the bottom of the lower wear-resistant seat 4, and a groove is provided at the top of the bottom wear-resistant plate 6. During hot forming, the heat-conducting strips 13 are in contact with the inner wall of the groove. After hot forming, the heat-conducting strips 13 are separated from the inner wall of the groove and inserted into the groove of the bottom wear-resistant plate 6, further increasing the contact area between the lower wear-resistant seat 4 and the bottom wear-resistant plate 6, improving the heat conduction efficiency between the two, ensuring that the bottom of the die-cast part is uniformly heated during hot forming, and ensuring the forming effect.

[0027] like Figure 6 As shown in this embodiment, the bottom of the heat-conducting strip 13 is provided with a heat-conducting surface 14 and a heat-conducting surface 15 connected in sequence. The heat-conducting surface 14 and the heat-conducting surface 15 are inclined in opposite directions. The oppositely inclined heat-conducting surface 14 and the heat-conducting surface 15 will not interfere with the normal movement of the heat-conducting strip 13. At the same time, it can further expand the contact area between the heat-conducting strip 13 and the inner wall of the groove and improve the heat conduction efficiency.

[0028] like Figure 3As shown in this embodiment, reinforcing ribs are fixed on opposite sides of the connector 8. The reinforcing ribs are fixed on the side of the lower wear-resistant seat 4. The reinforcing ribs enhance the connection strength between the connector 8 and the lower wear-resistant seat 4, prevent the connector 8 from cracking at the connection position between the electric push rod 7 and the lower wear-resistant seat 4, and ensure the stable movement of the lower wear-resistant seat 4.

[0029] Working principle: Start the electric push rod 7 in the forming machine to extend its telescopic end. Through the connector 8 on the side of the lower wear-resistant seat 4, the lower wear-resistant seat 4 is moved forward, moving from below the upper mold 1 to the front of the lower mold 2. At this time, the alloy die-casting part to be formed is placed into the lower wear-resistant seat 4. Then, control the telescopic end of the electric push rod 7 to shorten, pulling the lower wear-resistant seat 4 backward until the inclined surface at the bottom of the lower wear-resistant seat 4 is in close contact with the inclined surface at the top of the bottom wear-resistant plate 6. The close contact of the two inclined surfaces increases the contact area between them, laying the foundation for subsequent heat conduction. At the same time, several heat-conducting strips 13 at the bottom of the lower wear-resistant seat 4 are in close contact with the inner wall of the groove at the top of the bottom wear-resistant plate 6. The heat-conducting surface 14 at the bottom of the heat-conducting strip 13 and the oppositely inclined heat-conducting surface 15 are in close contact with the inner wall of the groove, further expanding the heat-conducting contact area and greatly improving the heat conduction efficiency between the lower wear-resistant seat 4 and the bottom wear-resistant plate 6. After the lower wear-resistant seat 4 is attached to the bottom wear-resistant plate 6, the lower wear-resistant seat 4 drives the roller 11 at the end of the U-shaped rod 9 to enter the slot 12 on the side of the lower mold 2 through the U-shaped rod 9. The roller 11 contacts the inclined extrusion surface at the top of the inner wall of the slot 12. The pressure generated by the extrusion surface pushes the U-shaped rod 9 downward, causing the front side of the lower wear-resistant seat 4 to be tightly attached to the bottom wear-resistant plate 6, preventing the front side of the lower wear-resistant seat 4 from lifting up, ensuring that the lower wear-resistant seat 4 is stably attached to the bottom wear-resistant plate 6 as a whole, and avoiding positional displacement during hot forming. Then, the hydraulic cylinder inside the forming machine is started. The hydraulic cylinder drives the upper mold 1 to move downward. The upper mold 1 drives the upper wear-resistant plate 3 to move downward synchronously until the upper wear-resistant plate 3 presses on the top of the alloy die casting. The electric heating plate inside the upper mold 1 and the lower mold 2 is started, so that the heat generated at the upper mold 1 and the lower mold 2 is transferred to the upper and lower surfaces of the alloy die casting. Combined with the pressure of the upper wear-resistant plate 3, hot pressing is achieved to correct the flatness of the alloy die casting. After hot forming, the hydraulic cylinder moves the upper mold 1 upward, separating the upper wear-resistant plate 3 from the alloy die-casting. Then, the electric push rod 7 is activated again to extend its telescopic end, thereby moving the lower wear-resistant seat 4 forward out of the upper mold 1. At this time, the roller 11 separates from the pressing surface of the slot 12, and the heat-conducting strip 13 disengages from the groove of the bottom wear-resistant plate 6. The operator can then remove the formed alloy die-casting from the lower wear-resistant seat 4 from a safe area away from the high-temperature upper mold 1, greatly improving operational safety. When long-term use causes the upper wear-resistant plate to become worn, the operator can remove the formed alloy die-casting from the lower wear-resistant seat 4. When the lower wear-resistant seat 3 or the lower wear-resistant seat 4 is worn, it is not necessary to replace the entire upper mold 1 or the lower mold 2. Simply remove the fixing bolts of the upper wear-resistant plate 3 to replace the upper wear-resistant plate 3. Then loosen the screws on the side sleeve of the connector 8 to release the fixation on the upper push rod end of the electric push rod 7. The lower wear-resistant seat 4 can then be removed. The upper wear-resistant plate 3 is fixed to the bottom of the upper mold 1 with bolts. The new lower wear-resistant seat 4 is fitted onto the push rod end of the electric push rod 7. Finally, the screws are tightened to connect the electric push rod 7 to the sleeve.

[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A flatness thermal shaping jig for alloy die castings, comprising an upper die (1) and a lower die (2) mounted in a shaper, characterized in that, The bottom of the upper mold (1) is fixed with an upper wear-resistant plate (3) by bolts, and the top of the lower mold (2) is provided with a lower wear-resistant seat (4). During hot forming, the alloy die casting is placed in the lower wear-resistant seat (4), and the upper mold (1) drives the upper wear-resistant plate (3) to move down and press on the alloy die casting.

2. The planarity hot sizing jig for an alloy die casting according to claim 1, characterized by, The side of the lower wear-resistant seat (4) is provided with a movable locking mechanism (5). The movable locking mechanism (5) includes an electric push rod (7) fixed in the forming machine. A connector (8) is fixed on the side of the lower wear-resistant seat (4). The connector (8) is detachably connected to the telescopic end of the electric push rod (7). A bottom wear-resistant plate (6) is fixed on the top of the lower mold (2). The top of the bottom wear-resistant plate (6) and the bottom of the lower wear-resistant seat (4) are both inclined surfaces. During hot forming, the two inclined surfaces fit together. After hot forming is completed, the electric push rod (7) extends and drives the lower wear-resistant seat (4) to move out from under the upper mold (1).

3. The planarity hot reshaping jig for an alloy die casting according to claim 2, characterized by, A locking assembly is provided on the side of the lower wear-resistant seat (4) away from the electric push rod (7). The locking assembly includes a U-shaped rod (9) fixed on the side of the lower wear-resistant seat (4) away from the electric push rod (7). A roller (11) is rotatably connected to the end of the U-shaped rod (9). A slot (12) is provided on the side of the lower mold (2). During hot forming, the roller (11) is in contact with the inclined extrusion surface at the top of the inner wall of the slot (12). After hot forming, the roller (11) is separated from the inclined extrusion surface at the top of the inner wall of the slot (12).

4. The hot forming fixture for the flatness of alloy die castings according to claim 3, characterized in that, The lower wear-resistant seat (4) is fixed with a connecting plate (10) on the side away from the electric push rod (7), and the connecting plate (10) is fixedly sleeved on the U-shaped rod (9).

5. The planarity hot reshaping jig for an alloy die casting according to claim 3, characterized by The inner wall of the U-shaped rod (9) is fixed with ribs.

6. The planarity hot reshaping jig of an alloy die casting according to claim 2, wherein The bottom of the lower wear-resistant seat (4) is fixed with several heat-conducting strips (13), and the top of the bottom wear-resistant plate (6) is provided with a groove. During heat forming, the heat-conducting strips (13) are attached to the inner wall of the groove. After heat forming, the heat-conducting strips (13) are separated from the inner wall of the groove.

7. The planarity hot reshaping jig for an alloy die casting according to claim 6, wherein The bottom of the heat-conducting strip (13) has a heat-conducting surface one (14) and a heat-conducting surface two (15) connected in sequence, with the inclination directions of the heat-conducting surface one (14) and the heat-conducting surface two (15) being opposite.

8. The planarity hot reshaping jig of an alloy die casting according to claim 2, wherein The connector (8) is fixed with reinforcing ribs on opposite sides, and the reinforcing ribs are fixed to the side of the lower wear-resistant seat (4).

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