Automobile drive axle spacer ring forming die

Abstract

The application relates to an automobile driving axle spacer forming die and relates to the technical field of dies, which comprises a die mechanism, a lower die of the die mechanism, an upper die arranged above the lower die, a supporting block arranged on the inner side of the lower die, a pressing block arranged on the inner side of the upper die, protrusions arranged on the adjacent ends of the supporting block and the pressing block, forming grooves arranged on the conical end head of the upper die and the bottom edge in the recess of the lower die, and a reset assembly, the reset assembly can realize bidirectional relative movement of the lower die relative to the supporting block and the upper die relative to the pressing block during die parting, the dislocation relative movement structure can make the two ends of a formed workpiece product stably separate from the pressing block and the supporting block respectively, solves the problem that workpiece end heads are prone to being stuck in protrusion structures and die inner walls during the forming process of traditional dies, workpiece products are difficult to be taken out, and the problem that a wrench or other professional auxiliary tools need to be used is solved, and the overall operation efficiency of the die is improved.

Description

Technical Field

[0001] This application relates to the field of mold technology, and in particular to a mold for forming automotive drive axle spacers. Background Technology

[0002] The preload of the main gear bearing in the drive axle reducer has a significant impact on the overall performance of the axle. Generally, the assembly method for adjusting the clearance of the main gear bearing is to install compressible spacers. Compressible spacers can adjust the bearing preload within a certain range and can adjust the bearing preload to the optimal state, avoiding axial movement caused by excessively tight or loose bearing assembly, reducing the noise of the main reducer assembly, and improving the quality of the main reducer assembly. At the same time, due to its compressibility, it can prevent the main gear nut from loosening. However, the production of spacers requires the use of specialized molds.

[0003] For example, Chinese patent CN104759535B discloses a compressible spacer forming mold for an automotive drive axle main reducer. This prior art split die structure can minimize the deformation of the workpiece blank, avoid workpiece breakage, and ensure that the compressible spacer has a bright and regular appearance, as well as stable strength performance and pressure curve.

[0004] However, firstly, the existing technology has corresponding top and bottom heads on both the lower unloading top block and the upper unloading pressure block. In the actual stamping process, due to the stamping deformation stress, the finished workpiece may get stuck between the top and the inner wall of the die or between the bottom and the inner wall of the die, making it very difficult to remove manually and requiring the use of professional tools. Secondly, metal shavings are generated during the die stamping process, resulting in shavings on the contact surfaces of the upper and lower dies as well as inside the die. The shavings on the contact surfaces can prevent the upper and lower dies from fitting together completely, leading to quality defects such as ring-shaped flash, burrs, or protrusions on the corresponding positions of the outer wall of the stamped product. The shavings inside the die will affect the quality of the finished product. Summary of the Invention

[0005] To address the aforementioned issues of difficulty in removing the workpiece and the impact of waste on stamping due to debris on the mold, this application provides an automotive drive axle spacer forming mold, including a mold mechanism. The mold mechanism includes a lower mold that can move up and down, and an upper mold that is coaxially disposed above the lower mold, capable of covering the lower mold for mold closing and pushing the lower mold down.

[0006] The lower mold has a fixed support block inside, and the upper mold has a pressing block inside to press the blank inside the mold after the lower and upper molds are closed. The adjacent ends of the support block and the pressing block are provided with protrusions.

[0007] A top plate is provided above the upper mold, and a reset assembly is also provided. The reset assembly includes a second spring that is sleeved on the outside of the pressure block and located between the upper mold and the top plate. Multiple sliders are provided on the side of the lower mold, and a first spring is connected between each slider and the bottom plate.

[0008] It is also equipped with a protection mechanism, which includes a set of transverse channels opened on the outer side of the lower mold and tangentially connected to the inner wall, and an air outlet channel extending to the outer side of the inner wall of the upper mold.

[0009] Both the lower and upper molds are equipped with annular air curtains on their outer sides, and the lower mold is also equipped with a liftable guide.

[0010] Preferably, the lower end of the upper mold is conical, and the upper end of the lower mold is provided with a groove that matches the lower end of the upper mold; both the conical end of the upper mold and the bottom edge of the groove in the lower mold are provided with forming grooves.

[0011] Preferably, when the lower end of the lower mold is inserted into the groove of the upper mold, the two forming grooves merge to form a forming cavity.

[0012] Preferably, the mold mechanism also includes a base plate located below the lower mold, a round seat connected to the lower end of the support block is installed at the center of the upper side of the base plate, and telescopic rods connected to the base plate are installed at the lower corners of the top plate.

[0013] Preferably, a set of guide rods symmetrically installed on the upper side of the upper mold, which penetrate the top plate and are slidably connected to it, is provided. A limit component is installed on the upper end of the guide rods, and the upper end of the pressure block is connected to the top plate.

[0014] Preferably, multiple sliders are slidably disposed on the main rod of each telescopic rod, and a spring is also sleeved on the main rod of the telescopic rod.

[0015] Preferably, the protection mechanism also includes an annular pipe installed on the side of the upper mold and below the air outlet. Several evenly distributed air nozzles are installed on the lower side of the annular pipe, and the gas ejected from all the air nozzles forms an annular air curtain.

[0016] Preferably, the inner side of the guide is inclined towards the mold direction, and a sliding part connected to the guide is slidably provided on the main rod of the telescopic rod. A vertical electric cylinder is installed on the upper side of the base plate. The telescopic arm end of the electric cylinder is connected to the guide with the upper end facing upward. When the electric cylinder is extended to its longest length, the inner edge of the guide is flush with the upper port of the lower mold. When the electric cylinder is retracted to its shortest length, the inner edge of the guide is flush with the bottom surface of the crossbeam.

[0017] Preferably, in the initial state, the bottom surface of the crossbeam is flush with the top of the support block, and the top surface of the air outlet is flush with the bottom of the pressure block.

[0018] In summary, this application includes the following beneficial technical effects: The reset component of this application enables bidirectional relative movement between the lower mold and the support block, and between the upper mold and the pressure block during the mold separation process. Relying on this misaligned relative movement structure, the two ends of the molded workpiece can be smoothly separated from the pressure block and the support block, respectively. This solves the problem that the workpiece end is easily stuck in the protruding structure and the inner wall of the mold during the traditional mold forming process, making it difficult to remove the finished product. It eliminates the need for professional auxiliary tools such as wrenches, improves the overall operating efficiency of the mold, and avoids problems such as workpiece deformation and mold structure wear caused by forced removal, thus ensuring the product forming quality and mold service life.

[0019] The annular air curtain can prevent external debris from falling onto the contact surfaces of the upper and lower molds and inside the mold. The airflow from the annular air curtain can be directed into the gap between the upper and lower molds by the up-and-down moving guide components to carry away and clean the debris on the contact surfaces. When the upper and lower molds are closed, the airflow can also be directed into the mold from the cross passage through the guide components to form a spiral airflow, which carries away the debris inside the mold and discharges it through the air outlet. This not only protects the inside of the mold but also cleans the debris inside the mold, preventing it from affecting the stamping quality. Attached Figure Description

[0020] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a structural diagram of this application.

[0022] Figure 2 This is a side view of this application.

[0023] Figure 3 This is a sectional view of the mold mechanism in this application.

[0024] Figure 4 This is a schematic diagram of the stamping state structure of this application.

[0025] Figure 5 This is a cross-sectional view of this application.

[0026] Figure 6 This is a cross-sectional view of the lower mold of this application.

[0027] Figure 7 This is a longitudinal section view of the lower mold component of this application.

[0028] Figure 8 This is a schematic diagram of the contact surface cleaning state structure of this application.

[0029] Figure 9 This is a schematic diagram of the internal wall cleaning state structure of this application.

[0030] Figure 10 This is a schematic diagram of the crossbar structure of this application.

[0031] In the diagram: 1. Mold mechanism; 11. Base plate; 12. Lower mold; 13. Upper mold; 14. Forming groove; 15. Support block; 16. Pressure block; 17. Top plate; 18. Telescopic rod; 19. Slider; 110. Spring 1; 111. Limiting plate; 112. Spring 2; 113. Guide rod 1; 114. Limiting component 1; 115. Round seat; 2. Protection mechanism; 21. Annular tube; 22. Air nozzle; 23. Crossbar; 24. Air outlet; 25. Guide component; 26. Sliding component; 27. Electric cylinder. Detailed Implementation

[0032] The following is in conjunction with the appendix Figures 1-10 The embodiments of this application will be described in detail.

[0033] This application discloses an automotive drive axle spacer molding die. The reset component can realize bidirectional relative movement between the lower die and the support block and between the upper die and the pressure block during the die separation process. Relying on this misaligned relative movement structure, the two ends of the molded workpiece can be smoothly separated from the pressure block and the support block, respectively. This solves the problem that the workpiece end is easily stuck in the protruding structure and the inner wall of the die during the traditional die forming process, making it difficult to remove the finished product. It eliminates the need for professional auxiliary tools such as wrenches, improves the overall operation efficiency of the die, and avoids problems such as workpiece deformation and die structure wear caused by forced removal, thus ensuring the product molding quality and die service life.

[0034] First embodiment, such as Figures 1-3 As shown, the mold mechanism 1 includes a lower mold 12 and an upper mold 13 arranged coaxially and vertically in a ring shape. The lower end of the upper mold 13 is a conical structure, and the upper end of the lower mold 12 is provided with a groove that matches the conical structure at the lower end of the upper mold 13. When in use, the lower conical end of the upper mold 13 is inserted into the corresponding groove of the lower mold 12 to complete the mold closing operation.

[0035] like Figure 2 and Figure 3 As shown, the tapered end of the upper mold 13 and the bottom edge of the groove in the lower mold 12 are both provided with forming grooves 14. When the lower end of the upper mold 13 is inserted into the groove of the lower mold 12, the two sets of forming grooves 14 are joined together to form a complete forming cavity. A support block 15 is fixedly installed inside the lower mold 12 and a pressure block 16 is fixedly installed inside the upper mold 13. The inner diameter of the lower mold 12 and the upper mold 13 is completely matched with the diameter of the spacer blank.

[0036] During use, the spacer blank is first placed inside the lower mold 12 and stably supported by the support block 15. Then, the upper mold 13 and the lower mold 12 are closed. The spacer blank is then stamped by the pressure block 16, and the spacer blank is stamped into a finished product in one go with the forming cavity. Figure 4As shown, after processing is completed, the upper mold 13 and the pressure block 16 are controlled to rise synchronously to complete the mold separation, and the finished product can be taken out from the lower mold 12.

[0037] like Figure 3 As shown, the support block 15 and the pressure block 16 are integrally provided with protrusions at their opposite ends. The distance between the protrusions and the inner walls of the lower mold 12 and the upper mold 13 is equal to the side wall thickness of the spacer blank. This allows the protrusions of the support block 15 and the pressure block 16 to provide all-round support and limit the inner wall of the spacer blank, thus preventing the blank end from deforming during the extrusion molding process.

[0038] like Figure 2 and Figure 3 As shown, the mold mechanism 1 also includes a base plate 11 arranged below the lower mold 12. A round seat 115 fixedly connected to the lower end of the support block 15 is installed at the center of the upper side of the base plate 11. A top plate 17 is matched and arranged above the upper mold 13. Each corner of the lower side of the top plate 17 is equipped with a telescopic rod 18 whose lower end is fixedly connected to the base plate 11. When in use, the base plate 11 is fixedly installed at the preset processing position to achieve the overall fixation of the mold device. The center of the upper side of the top plate 17 is connected to the telescopic end of the external hydraulic cylinder. The telescopic action of the hydraulic cylinder drives the top plate 17 to achieve vertical lifting and lowering. During the lifting and lowering process of the top plate 17, the telescopic rod 18 is simultaneously driven to complete the extension and retraction. The telescopic rod 18 is used to guide and limit the lifting and lowering process of the top plate 17.

[0039] like Figure 3 As shown, a set of guide rods 113 are symmetrically installed on the upper side of the upper mold 13, penetrating the top plate 17 and slidingly engaging with the top plate 17. A limiting component 114 is fixedly installed at the upper end of the guide rods 113. The upper end of the pressure block 16 is fixedly connected to the top plate 17. The reset assembly includes a spring 112 sleeved on the outside of the pressure block 16 and located between the upper mold 13 and the top plate 17. During the descent of the top plate 17, the pressure block 16 and the upper mold 13 are driven vertically downwards until the upper mold 13 and the lower mold 12 are closed. After the mold is closed, the continuously descending top plate 17 drives the pressure block 16 to continue to descend and compress the spring 112. During the ascent of the top plate 17, the pressure block 16 is first driven upwards and the spring 112 is extended and rebounded until the top plate 17 contacts and adheres to the limiting component 114. Then, the upper mold 13 is synchronously raised through the limiting component 114 to complete the mold separation operation.

[0040] like Figure 2 and Figure 3As shown, the reset assembly also includes a slider 19 slidably disposed on each telescopic rod 18 main rod and fixedly connected to the outer wall of the lower mold 12. A spring 110 is sleeved on the telescopic rod 18 main rod at the position of the slider 19 and the base plate 11. A limiting plate 111 is fixedly disposed on each telescopic rod 18 main rod at the position above the slider 19. The initial elastic force of the guide rod 113 is greater than the initial elastic force of the four springs 110. The limiting plate 111 is used to limit the upper limit position of the slider 19. After the upper mold 13 descends and contacts and fits with the lower mold 12, the lower mold 12 can be driven to descend synchronously by the difference in elastic force between the guide rod 113 and the spring 110. The slider 19 slides along the telescopic rod 18 main rod to realize the lifting and lowering guidance of the lower mold 12 and synchronously compress the spring 110 until the lower end of the lower mold 12 contacts the round seat 115 and stops the downward movement.

[0041] It should be noted that during the mold separation process, when the top plate 17 moves upward and drives the pressure block 16 to rise, the spring 112 in the compressed state will generate braking resistance on the upper mold 13 to inhibit the upper mold 13 from moving upward synchronously. At the same time, the forming cavity can limit and fix the stamped finished workpiece, so that the upward pressure block 16 can be smoothly separated from the upper end of the finished workpiece. After the upper mold 13 moves upward and releases the downward pressure limit on the lower mold 12, all the springs 110 in the compressed state will rebound synchronously and drive the lower mold 12 upward through the slider 19. With the help of the forming groove 14 of the lower mold 12, the finished workpiece will rise synchronously, so that the lower end of the finished workpiece will quickly separate from the support block 15.

[0042] In summary, the upper center of the top plate 17 is fixedly connected to the end of the vertically arranged hydraulic cylinder telescopic arm. During use, the metal spacer blank is placed inside the lower mold 12 and stably supported by the support block 15. Then, the hydraulic cylinder extends and drives the top plate 17 to descend vertically. The descending top plate 17 simultaneously drives the upper mold 13 and the pressure block 16 to descend until the upper mold 13 and the lower mold 12 are closed. The continuously descending top plate 17 further drives the lower mold 12 to descend and compresses the spring 110 through the slider 19 until the lower mold 12 contacts the round seat 115 and stops descending. Subsequently, the top plate 17 continues to drive the pressure block 16 to descend and compress the spring 112. At the same time, the pressure block 16 performs a stamping operation on the blank. With the forming structure of the forming cavity, the metal blank is stamped and processed into a spacer finished product.

[0043] After the stamping is completed, the hydraulic cylinder shortens and drives the top plate 17 and the pressure block 16 to move upward synchronously, so as to separate the pressure block 16 from the upper end of the finished workpiece. After the top plate 17 moves upward to contact the limiting part 114, the upper mold 13 moves upward synchronously. After the downward pressure limit on the upper mold 13 is released, the spring 110 rebounds and drives the lower mold 12 to move upward. The finished workpiece is driven to rise through the forming groove 14 of the lower mold 12 so that the lower end of the workpiece is completely separated from the support block 15 until the spring 110 returns to its initial state. Subsequently, the upper mold 13 continues to move upward and completely separates from the lower mold 12. The operator can then take out the finished workpiece placed on the lower mold 12.

[0044] In the second embodiment of this application, based on the first embodiment, metal shavings are generated during the die stamping process. During the die opening process, the shavings in the workshop are easily adhered to the contact surface between the lower die 12 and the forming groove 14. The continuous accumulation of shavings will cause the lower die 12 and the upper die 13 to not be able to fit together completely, resulting in quality defects such as annular flash, burrs or protrusions on the corresponding position of the outer wall of the stamped spacer. Moreover, the larger the gap of the shavings accumulation, the more obvious the defects of the finished product. The prior art usually sets a suitable annular air curtain on the outside of the die to block the external shavings, but it cannot deal with the shavings generated by the stamping inside the die. These shavings will still affect the die closing and subsequent stamping. The workers can only rely on the high-pressure air gun to manually clean the shavings inside the die. However, the prior art cannot simultaneously block the external shavings and clean the shavings inside the die.

[0045] Based on this, such as Figure 1 , Figure 2 and Figure 5 As shown, a protection mechanism 2 is provided. The protection mechanism 2 includes an annular pipe 21 installed on the side of the upper mold 13 and located below the air outlet 24. Several air nozzles 22 are evenly installed on the lower side of the annular pipe 21 in a ring array. After the annular pipe 21 is connected to an external high-pressure air pump, the high-pressure air pump can deliver high-pressure gas into the annular pipe 21 and spray it out synchronously through all the air nozzles 22 to form an annular air curtain. The blocking effect of the annular air curtain can prevent external waste from entering the contact surface between the lower mold 12 and the upper mold 13.

[0046] like Figures 5-7As shown, the protection mechanism 2 also includes a set of transverse channels 23 opened on the outer side of the lower mold 12 and tangentially connected to the inner wall of the lower mold 12. A guide member 25 is matched to the outer side of the lower mold 12, with the inner side of the guide member 25 inclined towards the lower mold 12. During operation, the inner edge of the guide member 25 is first adjusted to be flush with the upper end of the lower mold 12. Simultaneously, the distance between the lower mold 12 and the upper mold 13 is adjusted to bring them closer together. The inclined guide member 25 can guide the airflow of the air curtain into the gap between the contact surfaces of the lower mold 12 and the upper mold 13. The conical structure of the guide member 25 guides the airflow to the inner side of the lower mold 12. At the same time, the high-speed airflow washes away the debris adhering to the contact surfaces of the lower mold 12 and the upper mold 13. After entering the inner side of the lower mold 12, the airflow flows downwards and is finally discharged through the transverse channel 23. Figure 8 The state shown.

[0047] An air duct 24 extending to the outer side of the upper mold 13 is provided on the inner wall of the upper mold 13. During operation, the upper mold 13 is first controlled to descend and close with the lower mold 12 without triggering the downward movement of the lower mold 12. The vertical height of the guide member 25 is adjusted so that its inner edge is flush with the bottom surface of the crossbeam 23. Figure 10 In the state shown, the guide member 25 can guide the airflow into the transverse channel 23. Based on the tangential connection between the transverse channel 23 and the inner diameter of the lower mold 12, the airflow can form a spiral upward airflow after entering the inner side of the lower mold 12. The high-speed spiral upward airflow can completely sweep across the inner walls of the lower mold 12 and the upper mold 13, thoroughly washing away and removing the fine debris adhering to the inner walls of the molds. Finally, the airflow carrying the debris is discharged to the outside through the air outlet 24. Figure 9 As shown, the waste cleaning operation on the inner wall of the mold is completed.

[0048] It should be noted that in the initial state of the equipment, the bottom surface of the crossbeam 23 is flush with the upper surface of the support block 15 and the top surface of the air outlet 24 is flush with the lower surface of the pressure block 16. This structural design can ensure that the high-speed airflow introduced into the mold can completely cover the forming area of ​​the support block 15 and the pressure block 16, achieving waste cleaning without dead corners.

[0049] Meanwhile, during the stamping operation, the downward distance of the lower die 12 is greater than the vertical height of the horizontal track 23, and the downward distance of the pressure block 16 is greater than the vertical height of the air outlet 24. Thus, before stamping, the horizontal track 23 moves to the side of the support block 15, and the air outlet 24 moves to the side of the pressure block 16, avoiding the horizontal track 23 and the air outlet 24 from being located on the side of the workpiece and causing indentations on its outer surface during the stamping process.

[0050] like Figure 2As shown, a sliding component 26, which is fixedly connected to the guide component 25, is slidably mounted on the main rod of the telescopic rod 18. A vertically arranged electric cylinder 27 is fixedly installed on the upper side of the base plate 11. The telescopic arm end of the electric cylinder 27 is set upward and fixedly connected to the bottom of the guide component 25. The telescopic movement of the electric cylinder 27 can drive the guide component 25 to achieve vertical lifting and lowering. During the lifting and lowering process of the guide component 25, the sliding component 26 is simultaneously driven to slide along the main rod of the telescopic rod 18 to achieve the guiding limit of the lifting and lowering process of the guide component 25. When the electric cylinder 27 is extended to the maximum stroke, the inner edge of the guide component 25 is flush with the upper end of the lower mold 12. When the electric cylinder 27 is retracted to the minimum stroke, the inner edge of the guide component 25 is flush with the bottom surface of the crossbar 23.

[0051] In summary, after connecting the annular pipe 21 to an external high-pressure air pump, the high-pressure gas output by the high-pressure air pump can be sent into the interior of the annular pipe 21 and sprayed out synchronously through all the air nozzles 22 to form an annular air curtain. Relying on the barrier effect of the annular air curtain, it can prevent external waste from entering the gap between the contact surface of the lower mold 12 and the upper mold 13, thus avoiding mold closing defects caused by the accumulation of external waste from the source.

[0052] When cleaning the mold contact surface, the upper mold 13 is moved downward and close to the lower mold 12 by extending the hydraulic cylinder. The height of the guide 25 is adjusted so that the inner edge of its side surface is flush with the upper end of the lower mold 12. The guide 25 can guide the airflow of the air curtain into the gap between the contact surfaces of the lower mold 12 and the upper mold 13. The airflow is guided to the inner side of the lower mold 12 by the conical guide structure, and the waste debris adhering to the mold contact surface is washed away at the same time. The airflow carries the waste debris into the inner side of the mold and flows downward and is discharged through the cross channel 23.

[0053] During the mold inner wall cleaning operation, the upper mold 13 is controlled to continuously descend and fully close with the lower mold 12. The vertical height of the guide 25 is adjusted so that its inner edge is flush with the bottom surface of the cross 23. The guide 25 guides the airflow into the cross 23. Based on the tangential connection structure between the cross 23 and the inner wall of the mold, the airflow forms a spiral upward airflow inside the mold and thoroughly washes the inner walls of the upper and lower molds, peeling off the fine debris attached to the inner wall. The airflow carries the debris and finally discharges it to the outside through the air outlet 24, completing the mold inner wall cleaning operation. After cleaning, the lower mold 12 is controlled to move upward and reset. Then, the guide 25 is adjusted to the ready position of the upper port of the lower mold 12 and the cross 23 by extending the electric cylinder 27.

[0054] This application also discloses a method for using a mold for forming automotive drive axle spacers, specifically including the following steps: S1. Blank Forming: The metal spacer blank is placed inside the mold mechanism 1 to complete the stamping forming operation. Specifically, the upper center of the top plate 17 is fixedly connected to the end of the vertically arranged hydraulic cylinder telescopic arm. In use, the metal spacer blank is placed inside the lower mold 12 and stably supported by the support block 15. Then, the hydraulic cylinder extends and drives the top plate 17 to descend vertically. The descending top plate 17 simultaneously drives the upper mold 13 and the pressure block 16 to descend until the upper mold 13 and the lower mold 12 are closed. The continuously descending top plate 17 further drives the lower mold 12 to descend and compresses the spring 110 through the slider 19 until the lower mold 12 contacts the round seat 115 and stops descending. Subsequently, the top plate 17 continues to drive the pressure block 16 to descend and compress the spring 112. At the same time, the pressure block 16 performs a stamping operation on the blank, and the metal blank is stamped into a finished spacer in conjunction with the forming cavity.

[0055] S2. Finished Product Removal: The stamped finished workpiece is removed from the mold mechanism 1. Specifically, the hydraulic cylinder shortens, causing the top plate 17 and the pressure block 16 to move upwards simultaneously, separating the pressure block 16 from the upper end of the finished workpiece. After the top plate 17 moves upwards and contacts the limiting part 114, the upper mold 13 moves upwards in tandem. After the downward pressure limit on the upper mold 13 is released, the spring 110 rebounds and drives the lower mold 12 upwards. The finished workpiece is driven upwards through the forming groove 14 of the lower mold 12, so that the lower end of the workpiece is completely separated from the support block 15 until the spring 110 returns to its initial state. Subsequently, the upper mold 13 continues to move upwards and completely separates from the lower mold 12, and the operator can then remove the finished workpiece from the lower mold 12.

[0056] S3. Contact Surface Cleaning: The contact surface between the lower mold 12 and the upper mold 13 is cleaned of debris by the protection mechanism 2. Specifically, the hydraulic cylinder extends and drives the upper mold 13 to move down and approach the lower mold 12. The height of the guide 25 is adjusted so that the inner edge of its side surface is flush with the upper end of the lower mold 12. The guide 25 guides the airflow into the gap between the contact surfaces of the lower mold 12 and the upper mold 13. The airflow is guided to the inner side of the lower mold 12 through the conical structure. At the same time, the airflow washes away the debris adhering to the contact surface of the mold. After the airflow carries the debris into the inner side of the mold, it flows downward and is discharged through the cross channel 23, thus completing the chip removal operation of the mold contact surface.

[0057] S4. Inner wall cleaning: The inner walls of the lower mold 12 and the upper mold 13 are cleaned of debris by the protection mechanism 2. Specifically, the upper mold 13 is controlled to descend continuously and completely close with the lower mold 12. The vertical height of the guide 25 is adjusted so that its inner edge is flush with the bottom surface of the cross 23. The guide 25 guides the airflow into the cross 23. The airflow forms a spiral upward airflow inside the mold by relying on the tangential connection between the cross 23 and the inner wall of the mold. The airflow thoroughly washes the inner walls of the upper and lower molds and removes the attached fine debris. The airflow carries the debris and discharges it to the outside through the air outlet 24, completing the cleaning operation of the inner wall of the mold. After the cleaning is completed, the lower mold 12 is controlled to move upward and reset. Then, the guide 25 is moved to the standby position of the upper port of the lower mold 12 and the cross 23 by the extension of the electric cylinder 27.

[0058] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects.

[0059] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A molding die for forming automotive drive axle spacers, characterized in that: The mold mechanism (1) includes a lower mold (12) that can move up and down, and an upper mold (13) that can cover the lower mold (12) for mold closing and push the lower mold (12) down. The lower mold (12) has a fixed support block (15) on its inner side, and the upper mold (13) has a pressing block (16) on its inner side to press the blank inside the lower mold (12) and the upper mold (13) after they are closed. The support block (15) and the pressing block (16) have protrusions at their adjacent ends. A top plate (17) is provided above the upper mold (13), and a reset assembly is also provided. The reset assembly includes a second spring (112) sleeved on the outside of the pressure block (16) and located between the upper mold (13) and the top plate (17). Multiple sliders (19) are provided on the side of the lower mold (12), and a first spring (110) is connected between each slider (19) and the bottom plate (11). It is also provided with a protection mechanism (2), which includes a set of transverse channels (23) opened on the outer side of the lower mold (12) and tangentially connected to the inner wall, and an air outlet channel (24) extending to the outer side of the inner wall of the upper mold (13). The lower mold (12) and the upper mold (13) are both provided with annular air curtains on their outer sides, and the lower mold (12) is also provided with a guide (25) that can be raised and lowered on its outer side.

2. The automotive drive axle spacer molding die according to claim 1, characterized in that: The lower end of the upper mold (13) is conical, and the upper end of the lower mold (12) is provided with a groove that matches the lower end of the upper mold (13); the conical end of the upper mold (13) and the bottom edge of the groove in the lower mold (12) are both provided with forming grooves (14).

3. The automotive drive axle spacer molding die according to claim 2, characterized in that: When the lower end of the lower mold (12) is inserted into the groove of the upper mold (13), the two forming grooves (14) merge to form a forming cavity.

4. The automotive drive axle spacer molding die according to claim 1, characterized in that: The mold mechanism (1) also includes a base plate (11) located below the lower mold (12). A round seat (115) connected to the lower end of the support block (15) is installed at the center of the upper side of the base plate (11). A telescopic rod (18) connected to the lower end of the base plate (11) is installed at the lower corner of the top plate (17).

5. The automotive drive axle spacer molding die according to claim 1, characterized in that: A set of guide rods (113) that penetrate the top plate (17) and are slidably connected to it are symmetrically installed on the upper side of the upper mold (13). A limit part (114) is installed on the upper end of the guide rod (113), and the upper end of the pressure block (16) is connected to the top plate (17).

6. The automotive drive axle spacer molding die according to claim 4, characterized in that: Multiple sliders (19) are slidably mounted on the main rod of each telescopic rod (18), and spring 1 (110) is also mounted on the main rod of the telescopic rod (18).

7. The automotive drive axle spacer forming mold according to claim 1, characterized in that: The protective mechanism (2) also includes an annular pipe (21) installed on the side of the upper mold (13) and below the air outlet (24). Several evenly distributed air nozzles (22) are installed on the lower side of the annular pipe (21). All the air nozzles (22) spray gas to form an annular air curtain.

8. The automotive drive axle spacer molding die according to claim 7, characterized in that: The inner side of the guide (25) is inclined towards the mold (12). The main rod of the telescopic rod (18) is slidably provided with a sliding part (26) connected to the guide (25). A vertical electric cylinder (27) is installed on the upper side of the base plate (11). The telescopic arm end of the electric cylinder (27) is connected to the guide (25) with the telescopic arm facing upward. When the electric cylinder (27) is extended to its longest length, the inner edge of the guide (25) is flush with the upper end of the lower mold (12). When the electric cylinder (27) is retracted to its shortest length, the inner edge of the guide (25) is flush with the bottom surface of the crossbar (23).

9. The automotive drive axle spacer forming mold according to claim 8, characterized in that: In the initial state, the bottom surface of the crossbar (23) is flush with the top of the support block (15), and the top surface of the air outlet (24) is flush with the bottom of the pressure block (16).

Images