A new high-pressure die-casting part insert and its fixing method

Abstract

The application discloses a positioning method for a novel high-pressure die-casting part insert and a fixing structure thereof, which comprises a main body structure, a connecting part arranged at the rear end of the main body structure, the connecting part being capable of being detachably connected with the inside of a die-casting mold, a positioning shaft arranged at the front end of the main body structure, the positioning shaft being capable of being inserted into a positioning groove on the insert, a groove one arranged on the positioning shaft, the groove one being capable of being positioned and connected with a groove two in the positioning groove of the insert through a fusible part, the melting point of the fusible part being lower than the temperature during die casting of the die-casting part, and the groove one and the groove two being released from the positioning after the fusible part is melted. The insert and the fixing structure are highly integrated, easy to install and convenient to replace, are not limited by the installation position, are separated from the fixing device by melting the fusible part through heat transfer of aluminum liquid during the forming process, and do not affect the taking out of the high-pressure die-casting part from the mold.

Description

Technical Field

[0001] This invention belongs to the field of high-pressure die casting technology, and specifically relates to a novel method for fixing inserts and their fixing structures in high-pressure die casting. Background Technology

[0002] Die casting is one of the most efficient metal forming technologies, with a history of over 170 years. It has undergone continuous reform, evolution, and innovation, demonstrating rapid progress. In recent years, with the development of the global economy, especially the implementation of Tesla's unibody die casting process, the application of high-pressure die casting technology has been further promoted, particularly in the automotive parts industry.

[0003] High-pressure die-cast aluminum alloy parts inevitably connect to other parts. Due to their relatively low hardness, threaded connections to these parts can easily damage the threads. Typically, inserts are installed on the aluminum alloy to indirectly increase the contact area between the bolts and the aluminum alloy part, reducing stress and preventing deformation of the aluminum alloy body.

[0004] Currently, there are two types of inserts: one is to add a wire thread sleeve after the high-pressure die-cast aluminum part is formed, and the other is a solid cylindrical pin. The drawback is that holes need to be opened on two molds to ensure that no axial movement occurs. However, this type usually penetrates through the part body, causing leakage at the junction of the insert and the aluminum alloy body. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a new method for fixing inserts and fixing structures of high-pressure die-casting parts. The inserts and fixing structures are highly integrated, easy to install and replace, and not limited by the installation position. During the molding process, the heat transfer of aluminum liquid melts the fusible part, allowing the inserts to separate from the fixing device without affecting the removal of the high-pressure die-casting parts from the mold.

[0006] A novel high-pressure die-casting part insert is provided. The insert and the fixing structure are highly integrated, easy to install and replace, and not limited by the installation position. During the molding process, the heat transfer of the aluminum liquid melts the fusible part, allowing the insert to separate from the fixing device without affecting the removal of the high-pressure die-cast part from the mold.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A novel method for fixing a high-pressure die-casting part insert and its fixing structure includes a main structure. The rear end of the main structure has a connecting part that can be detachably connected to the inside of the die-casting mold. The front end of the main structure has a positioning shaft that can be inserted into a positioning groove on the insert. The positioning shaft has a first groove that can be positioned and connected to a second groove in the positioning groove of the insert through a fusible element. The melting point of the fusible element is lower than the temperature during die casting. After the fusible element melts, the first groove and the second groove are released from positioning.

[0008] The front end of the main structure is provided with a positioning surface, which positions the end face of the assembled insert.

[0009] The main structure has a mounting groove at the front end, and the positioning surface is located in the mounting groove. The mounting groove causes the end of the insert to protrude from the die-cast part, which facilitates subsequent processing and improves connection stability.

[0010] After the fusible part melts, it can flow into the bottom of the positioning groove.

[0011] The positioning shaft is a stepped shaft, and groove one is located on the stepped surface of the positioning shaft. The positioning groove is a stepped groove, and groove two is located on the stepped surface of the positioning groove. When the insert is assembled with the fixed structure, the stepped surfaces of the positioning shaft and the positioning groove cooperate to compress the fusible part and deform it. When the fusible part deforms to the area of ​​groove one and groove two, the positioning of groove one and groove two is completed, thereby positioning the insert and the fixed structure.

[0012] The connecting part is cylindrical with threads on the outside, and can be detachably connected to the die-casting mold through the threads.

[0013] The fusible element is a ring with a circular or rectangular cross-section.

[0014] Tin can be selected as the material for fusible components.

[0015] The connecting part can be threadedly connected to the slider.

[0016] A guide cone is provided at the front end of the positioning shaft.

[0017] The positioning shaft is a splined shaft, and the positioning groove has an internal spline groove corresponding to the spline of the positioning shaft. The spline serves both directional positioning and the gap between the spline and the spline groove allows the fusible part to flow out after melting.

[0018] A gap is provided between the positioning groove and the positioning shaft. The gap is used to allow the molten fusible part to flow out, such as into the bottom of the positioning groove.

[0019] like Figure 2 A novel high-pressure die-casting part insert has reinforcing textures on its outer surface and a positioning groove on its end face. The positioning groove can be inserted into a positioning shaft. The positioning groove has a second groove, which can be positioned and connected to the first groove on the positioning shaft through a fusible element. The melting point of the fusible element is lower than the temperature during die casting. After the fusible element melts, the first groove and the second groove are released from positioning.

[0020] After the fusible part melts, it can flow into the bottom of the positioning groove.

[0021] The positioning groove is a stepped groove, and the second groove is located on the stepped surface of the positioning groove. The positioning shaft is a stepped shaft, and the first groove is located on the stepped surface of the positioning shaft. When the insert is assembled with the fixed structure, the positioning shaft and the stepped surface of the positioning groove cooperate to compress the fusible part and deform it. When the fusible part deforms to the area of ​​the first and second grooves, the positioning of the first and second grooves is completed, thereby positioning the insert and the fixed structure.

[0022] The positioning groove is coated with pine oil.

[0023] The textured surface resembles a herringbone gear.

[0024] The fusible component can be pre-installed in the positioning slot.

[0025] Technical effects of the present invention: The insert and fixing structure are highly integrated, easy to install and replace, and not limited by the installation location. During the molding process, the heat transfer of the aluminum liquid melts the fusible part, so that the insert and fixing device are separated, without affecting the removal of the high-pressure die-cast part from the mold. Attached Figure Description

[0026] Figure 1 : Schematic diagram of the outer surface of the high-pressure die-cast insert Figure 2 : Cutaway view of insert Figure 3 Schematic diagram of fixed structure Figure 4 3D schematic diagram of fixed structure Figure 5 Schematic diagram of the assembly of the insert and its fixing structure Figure 6 Assembly diagram of unextruded fusible components Figure 7 Assembly diagram after extrusion of fusible components Figure 8 : Assembly diagram of fusible components after they have been heated and melted Figure 9 : Assembly diagram of the fixed structure mounted on the slider Figure 10 Schematic diagram of the assembly section of the fixed structure mounted on the slider. Figure 11 Schematic diagram of the mold with the inserts assembled. Figure 12 Schematic diagram of the mold after mold closing Figure 13 Schematic diagram of a high-pressure die-cast flat part with a gate Figure 14 : Figure 13 Sectional view diagram from direction A 1. Insert; 2. Fusible part; 3. Fixed structure; 4. Die-casting moving mold; 5. Die-casting stationary mold; 6. Slider; 7. Runner; 8. Flat plate part; 11. Positioning groove; 12. Groove II; 31. Connecting part; 32. Positioning surface; 33. Mounting groove; 34. Positioning shaft; 35. Main structure; 36. Stepped surface; 37. Groove I; 38. Guide cone. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0029] Example 1 like Figure 3-8 A novel method for fixing a high-pressure die-casting part insert and its fixing structure includes a main structure 35, a connecting part 31 at the rear end of the main structure 35, the connecting part 31 being detachably connected to the inside of the die-casting mold, a positioning shaft 34 at the front end of the main structure, the positioning shaft 34 being able to be inserted into the positioning groove 11 on the insert 1, the positioning shaft 34 being provided with a first groove 37, the first groove 37 being able to be positioned and connected with a second groove 12 in the positioning groove 11 of the insert 1 through a fusible element 2, the melting point of the fusible element 2 being lower than the temperature during die casting, and after the fusible element 2 melts, the first groove 37 and the second groove 12 are released from positioning.

[0030] The main structure 35 has a positioning surface 32 at the front end, which positions the end face of the assembled insert 1.

[0031] The main structure 35 has a mounting groove 33 at its front end, and the positioning surface 32 is located in the mounting groove 33. The mounting groove 33 causes the end of the insert 1 to protrude from the die-cast part, which facilitates subsequent processing and improves connection stability.

[0032] The material of fusible component 2 can be tin.

[0033] After the fusible part 2 melts, it can flow into the bottom of the positioning groove 11.

[0034] The material of the fusible part can be any metal with a melting point lower than the temperature of the aluminum liquid during die casting, such as tin, lead, bismuth and their alloys, or a polymer material with a certain degree of plasticity.

[0035] The positioning shaft 34 is a stepped shaft, and the first groove 37 is located at the stepped surface 36 of the positioning shaft 34. The positioning groove 11 is a stepped groove, and the second groove 12 is located at the stepped surface 36 of the positioning groove 11. When the insert 1 is assembled with the fixed structure 3, the positioning shaft 34 and the stepped surface 36 of the positioning groove 11 cooperate to compress the fusible part 2 to deform it. When the fusible part 2 is deformed to the area of ​​the first groove 37 and the second groove 12, the positioning of the first groove 37 and the second groove 12 is completed, thereby positioning the insert 1 and the fixed structure 3.

[0036] Step surface 36 is also known as shoulder.

[0037] The connecting part 31 is a cylinder with threads on the outside, and can be detachably connected to the die-casting mold through the threads.

[0038] The fusible element 2 is a ring with a circular or rectangular cross-section.

[0039] The connecting part 31 can be threadedly connected to the slider 6.

[0040] The positioning shaft 34 has a guide cone 38 at its front end. The conical surface serves as a guide to facilitate the insertion of the high-pressure die-cast insert 1.

[0041] The positioning shaft 34 is a splined shaft, and the positioning groove 11 has an internal spline groove corresponding to the spline of the positioning shaft 34. The spline serves both directional positioning and the gap between the spline and the spline groove allows the fusible part 2 to flow out after melting.

[0042] A gap is provided between the positioning groove 11 and the positioning shaft 34. The gap is used to allow the molten fusible part 2 to flow out, such as into the bottom of the positioning groove 11.

[0043] Usage: The fixed structure 3 is installed on the mold slider 6 via a rear thread. The fusible part 2 is placed inside the insert 1. When the mold opens, the robot arm inserts the high-pressure die-casting insert 1 into the fixed structure 3 via a three-jaw chuck. As the insert 1 is inserted, the positioning shaft 34 and the stepped surface 36 of the positioning groove 11 cooperate to squeeze and press the fusible part 2 into the first groove 37 and the second groove 12. The fusible part 2 becomes a sheet-like ring structure that hangs the insert 1 on the fixed structure 3. The die-casting moving mold 4, the die-casting stationary mold 5, and the slider 6 complete the mold closing. The molten aluminum alloy quickly fills the mold cavity under high pressure. During the cooling and solidification process of the aluminum alloy, the temperature of the mold gradually rises. Since the melting temperature of the fusible part 2 is low, the fusible part 2 will melt and flow out. The high-pressure die-casting insert 1 can be separated from the fixed structure 3. The mold opens, and the die-casting process is completed. Afterwards, threaded holes are machined on the insert 1 to realize the function of the insert 1.

[0044] Example 2 like Figure 2 A novel high-pressure die-casting part insert, the insert 1 has a reinforcing texture on its outer surface, and a positioning groove 11 on the end face of the insert 1. The positioning groove 11 can be inserted into the positioning shaft 34. The positioning groove 11 has a second groove 12. The second groove 12 can be positioned and connected with the first groove 37 on the positioning shaft 34 through a fusible element 2. The melting point of the fusible element 2 is lower than the temperature during die casting. After the fusible element 2 melts, the first groove 37 and the second groove 12 are released from positioning.

[0045] After the fusible part 2 melts, it can flow into the bottom of the positioning groove 11.

[0046] The positioning groove 11 is a stepped groove, and the second groove 12 is located at the stepped surface 36 of the positioning groove 11. The positioning shaft 34 is a stepped shaft, and the first groove 37 is located at the stepped surface 36 of the positioning shaft 34. When the insert 1 is assembled with the fixed structure 3, the positioning shaft 34 and the stepped surface 36 of the positioning groove 11 cooperate with each other to compress the fusible part 2 and deform it. When the fusible part 2 is deformed to the area of ​​the first groove 37 and the second groove 12, the positioning of the first groove 37 and the second groove 12 is completed, thereby positioning the insert 1 and the fixed structure 3.

[0047] The positioning groove 11 is coated with pine oil. Pine oil has good tin-containing properties and can encapsulate the solder to flow out from the gap.

[0048] like Figure 1 The enhanced texture is a herringbone gear surface, which is combined with molten aluminum through a high-pressure die-casting process and embedded into the part. The herringbone concave groove on the outer side can withstand torque and axial tension.

[0049] The fusible element 2 can be pre-installed in the positioning slot 11.

[0050] like Figure 9 , 10 The assembly of insert 1, fixing structure 3 and slider 6 is disclosed.

[0051] like Figure 11 , 12 The assembly of the slider 6 with the fixed structure 3, the die-casting moving mold 4, and the die-casting stationary mold 5 is disclosed.

[0052] like Figure 13 , 14 A schematic diagram of a die casting part is disclosed, which is completed by using the fixing structure 3 and insert 1 of the present invention.

[0053] Usage: The fixed structure 3 is installed on the mold slider 6 via a rear thread. The fusible part 2 is placed inside the insert 1. When the mold opens, the robot arm inserts the high-pressure die-casting insert 1 into the fixed structure 3 via a three-jaw chuck. As the insert 1 is inserted, the positioning shaft 34 and the stepped surface 36 of the positioning groove 11 cooperate to squeeze and press the fusible part 2 into the first groove 37 and the second groove 12. The fusible part 2 becomes a sheet-like ring structure that hangs the insert 1 on the fixed structure 3. The die-casting moving mold 4, the die-casting stationary mold 5, and the slider 6 complete the mold closing. The molten aluminum alloy quickly fills the mold cavity under high pressure. During the cooling and solidification process of the aluminum alloy, the temperature of the mold gradually rises. Since the melting temperature of the fusible part 2 is low, the fusible part 2 will melt and flow out. The high-pressure die-casting insert 1 can be separated from the fixed structure 3. The mold opens, and the die-casting process is completed. Afterwards, threaded holes are machined on the insert 1 to realize the function of the insert 1.

[0054] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A novel positioning method for inserts and their fixing structures in high-pressure die-casting parts, comprising a main structure, characterized in that... The main structure has a connecting part at the rear end, which can be detachably connected to the inside of the die-casting mold. The main body has a positioning shaft at the front end, which can be inserted into the positioning groove on the insert. The positioning shaft has a groove one, which can be positioned and connected with groove two in the positioning groove of the insert through a fusible element. The melting point of the fusible element is lower than the temperature during die casting. After the fusible element melts, groove one and groove two are released from positioning. The positioning shaft is a stepped shaft, and groove one is located at the stepped surface of the positioning shaft. The positioning groove is a stepped groove, and groove two is located at the stepped surface of the positioning groove. When the insert is assembled with the fixed structure, the positioning shaft and the stepped surface of the positioning groove cooperate to squeeze the fusible element to deform it. When the fusible element deforms to the area of ​​groove one and groove two, the positioning of groove one and groove two is completed, thereby positioning the insert and the fixed structure. There is a gap between the positioning groove and the positioning shaft, which is used to allow the molten fusible element to flow out, such as flowing into the bottom of the positioning groove.

2. The positioning method for a novel high-pressure die-casting part insert and its fixing structure as described in claim 1, characterized in that, The front end of the main structure is provided with a positioning surface, which positions the end face of the assembled insert.

3. The positioning method for a novel high-pressure die-casting part insert and its fixing structure as described in claim 2, characterized in that, The main structure has a mounting groove at the front end, and the positioning surface is located in the mounting groove.

4. The positioning method for a novel high-pressure die-casting part insert and its fixing structure as described in claim 1, characterized in that, A guide cone is provided at the front end of the positioning shaft.

5. The positioning method for a novel high-pressure die-casting part insert and its fixing structure as described in claim 1, characterized in that, The positioning shaft is a splined shaft, and the positioning groove has an internal spline groove corresponding to the spline of the positioning shaft.

6. The positioning method for a novel high-pressure die-casting part insert and its fixing structure as described in claim 1, characterized in that, The fusible element is a ring with a circular or rectangular cross-section.

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