Aluminum die-casting finish machining upper die mechanism

Abstract

The invention discloses an upper die mechanism for aluminum die casting finish machining. The upper die mechanism comprises a main air cylinder, a fixed die plate, a movable die plate, a die core assembly and a clamping assembly. The stamping die cutter body is fixedly arranged below the stamping die fixing plate; the stamping die cutter body comprises a cutter edge part and at least one inner area enclosed by the cutter edge part; the clamping assembly comprises a plurality of clamping units fixed below the movable die plate, and each clamping unit is located on the periphery of the stamping die cutter body and comprises a clamping air cylinder and a clamping piece driven by the clamping air cylinder. A channel is formed in the edge part of the cutter, and the clamping piece is driven by the clamping cylinder to extend into or retreat from the channel; when the stamping die cutter body acts on a workpiece, the clamping air cylinder drives the clamping piece to enter the inner area from the channel to clamp the workpiece. And when the main cylinder drives the movable template to ascend, the workpiece synchronously moves upwards along with the movable template so as to be separated from the lower die.

Description

Technical Field

[0001] This invention relates to the technical field of die casting processing equipment, and more particularly to an upper mold mechanism for precision machining of aluminum die casting. Background Technology

[0002] After die casting, the edges of die-cast parts often retain excess structures such as runner components, gate sprues, flash, and burrs. These residues not only affect the product's appearance and dimensional accuracy but may also interfere with subsequent assembly processes and performance. Therefore, these structures must be removed through finishing processes. In traditional machining processes, edge trimming machines are often used to punch or mill these residues, achieving efficient and stable machining results.

[0003] Patent document CN 115990664A discloses a slag removal device for aluminum die castings, including a fixed lower mold, a movable upper mold, and at least one transverse moving mold. The movable upper mold is vertically movable above the fixed lower mold and close to the fixed lower mold. The workpiece is held vertically between the fixed lower mold and the movable upper mold. The transverse moving mold is horizontally movable and located on one side of the fixed lower mold. The movable upper mold has a downwardly protruding first ridge, and the lower end face of the first ridge has a longitudinal blade that longitudinally cuts the slag on the outer periphery of the workpiece. The inner side of the transverse moving mold has a protruding second ridge, and the inner end face of the second ridge has a transverse blade. The transverse moving mold is close to the first side of the workpiece held between the fixed lower mold and the movable upper mold, and the transverse blade transversely cuts the slag on the edge of the first side of the workpiece. The advantage is that it can efficiently and simultaneously remove the slag from multiple angles.

[0004] Patent document CN 221538835U discloses an automated precision milling device for aluminum die castings, including a first slide rail, a second slide rail, a switching module, a positioning module, and a precision milling module. The first and second slide rails are arranged parallel and staggered. The switching module includes a support seat and a first lateral cylinder, which drives the support seat to move perpendicular to the two slide rails. The support seat includes a bottom support wall and two side positioning walls protruding upward from the bottom support wall. In a first state, the first positioning block and the second positioning block are away from the two slide rails. The first lateral cylinder drives the support seat so that the opening of the support position is connected to the end of the first slide rail. In a second state, the first lateral cylinder drives the support seat so that the opening of the support position is connected to the beginning of the second slide rail. The first positioning block and the second positioning block close together to hold the upper part of the workpiece. The precision milling module performs on-rail processing. After processing, the first positioning block and the second positioning block release the workpiece, and the workpiece continues to be transported on-rail along the second slide rail, thereby improving processing efficiency.

[0005] While the aforementioned equipment has made some breakthroughs in improving local processing efficiency and automation, significant drawbacks remain. These devices often rely on a single robotic arm for both loading and unloading workpieces. Due to the limited internal space, when the robotic arm grips a finished workpiece vertically downwards from above the lower die, the operating space is narrow, making it prone to collisions and interference with the die or workpiece, resulting in scratches or structural damage. Furthermore, during the processing cycle, after the upper die completes punching or milling operations, it needs to rise and reset. At this time, the robotic arm must first enter the lower die area to retrieve the processed workpiece, transfer it to the next station or collection area, and then return to the storage area to grab a new workpiece and place it on the lower die. Only after the robotic arm exits the processing area can the upper die descend to begin the next cycle. Throughout this process, the robotic arm's movement path is long and the timing is interleaved. This not only increases the equipment's idle waiting time but also makes the process connections less smooth, ultimately resulting in low overall production efficiency and making it difficult to meet the demands of efficient continuous production. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an aluminum die casting precision machining upper mold mechanism that can lift and pick up parts quickly and operate efficiently.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: an upper mold mechanism for precision machining of aluminum die casting, including a main cylinder, a fixed template, a movable template, a mold core assembly and a clamping assembly; the main cylinder is fixed on the fixed template and passes through the fixed template to connect with the movable template, so as to drive the movable template to move up and down;

[0008] The mold core assembly includes a mold core mounting plate, a die fixing plate, a die cutter body, and an elastic component; the mold core mounting plate is mounted above the movable template, and the die fixing plate is connected to the mold core mounting plate through the elastic component;

[0009] The die cutter body is fixedly disposed below the die fixing plate; the die cutter body includes a blade edge and at least one internal region enclosed by the blade edge.

[0010] The clamping assembly includes multiple clamping units fixed below the movable template. Each clamping unit is located around the punch die body and includes a clamping cylinder and a clamping member driven by the clamping cylinder. The blade edge is provided with a channel, and the clamping member is driven by the clamping cylinder to extend into or retract from the channel.

[0011] When the die cutter body acts on the workpiece, the clamping cylinder drives the clamping member to enter the internal area from the channel to clamp the workpiece;

[0012] When the main cylinder drives the movable template to rise, the workpiece moves upward synchronously with the movable template to disengage from the lower mold.

[0013] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problem is as follows: a plurality of vertical partitions are provided above the die fixing plate, the vertical partitions enclose a receiving area, and the elastic component is located in the receiving area.

[0014] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: the lower section of the die fixing plate is provided with a mounting groove, the mounting groove is provided with a mounting block, and the clamping cylinder is fixed on the outside of the mounting block.

[0015] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: the lower part of the mounting block is provided with a guide groove, and the clamping member connected to the output end of the clamping cylinder moves laterally along the guide groove.

[0016] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problem is as follows: the outer side wall of the mounting block is provided with an outwardly protruding transverse extension plate, and a stroke sensor is provided below the transverse extension plate to limit the stroke of the clamping member.

[0017] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: the guide groove includes a horizontal groove and a vertical groove to make the cross-section T-shaped; the clamping member includes a horizontal part and a vertical part to form a T-shaped structure adapted to the guide groove.

[0018] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problem is: the end of the clamping member is bent inward to form a horizontal hook.

[0019] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: the stroke sensor is a stroke switch, and the rear end of the clamping cylinder is provided with a stroke limit block. When the stroke limit block contacts the stroke switch, the clamping cylinder stops retracting.

[0020] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is that the die body is composed of multiple die body units spliced ​​together.

[0021] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is: an upper die pressing head for pressing the workpiece is also provided below the movable template.

[0022] Compared with existing technologies, the advantages of this invention are: this device changes the traditional method of relying on ejector plates, robotic arms, or manual prying, and directly and smoothly pulls the workpiece out through mechanical clamping force, avoiding workpiece deformation, surface scratches, or cracks caused by poor demolding, thus significantly improving the yield rate. Moreover, the demolding action is seamlessly connected with the return stroke of the main cylinder, greatly improving production efficiency and making it suitable for automated production lines. Attached Figure Description

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0024] Figure 1 A schematic diagram of an upper mold mechanism for precision machining of aluminum die casting. Figure 1 ;

[0025] Figure 2 A schematic diagram of an upper mold mechanism for precision machining of aluminum die casting. Figure 2 ;

[0026] Figure 3 A schematic diagram of an upper mold mechanism for precision machining of aluminum die casting. Figure 3 ;

[0027] Figure 4 This is a partially exploded view of an upper mold mechanism for precision machining in aluminum die casting.

[0028] Figure 5 A schematic diagram of a model component for a die-casting precision machining upper mold mechanism for aluminum;

[0029] Figure 6 This is a schematic diagram of a clamping assembly for an upper die-casting precision machining mechanism for aluminum.

[0030] Figure 7 This is an exploded view of the clamping assembly of an upper mold mechanism for precision machining of aluminum die casting. Detailed Implementation

[0031] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of the invention.

[0032] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it will not be further defined and explained in subsequent figures.

[0033] In the description of this invention, it should be noted that the terms "upper," "lower," "front," "rear," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the die-cast parts of this invention are in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Similarly, "first" and "second" are only for ease of understanding and have no other directional meaning, and should not be considered as limitations on this invention.

[0034] like Figure 1 As shown, this embodiment provides an upper mold mechanism for precision machining of aluminum die casting, including a main cylinder 1, a fixed template 2, a movable template 3, a mold core assembly 4, and a clamping assembly 5. The main cylinder 1 is fixed on the fixed template 2 and passes through the fixed template 2 to connect with the movable template 3, so as to drive the movable template 3 to move up and down.

[0035] like Figure 2-4 As shown, the die core assembly 4 includes a die core mounting plate 41, a die fixing plate 42, a die cutter body 43, and an elastic component 44. The die core mounting plate 41 is mounted above the movable template 3, and the die fixing plate 42 is connected to the die core mounting plate 41 via the elastic component 44. The die cutter body 43 is fixed below the die fixing plate 42. The die cutter body 43 includes a cutting edge 431 and at least one internal region 432 enclosed by the cutting edge 431. The elastic component 44 ensures the smoothness of the stamping process and overload protection.

[0036] like Figure 2-4 As shown, the clamping assembly 5 further includes multiple clamping units 50 fixed below the movable template 3. Each clamping unit 50 is located around the die body 43 and includes a clamping cylinder 51 and a clamping member 52 driven by the clamping cylinder 51. The die edge 431 is provided with a channel 433, and the clamping member 52 is driven by the clamping cylinder 51 to extend into or retract from the channel 433. The channel 433 on the die edge 431 is the only path for the clamping member 52 to enter the workpiece area and does not interfere with the stamping function.

[0037] When the die body 43 acts on the workpiece, after the stamping action is completed, the clamping cylinder 51 immediately actuates, pushing the clamping member 52 through the channel 433 into the internal area 432 of the die body 43, tightly hooking or pressing the processed workpiece. When the main cylinder 1 returns, it drives the movable template 3 to move upward. Since the workpiece has been firmly fixed by the clamping member 52, its upward force directly overcomes the clamping force between the workpiece and the lower die, allowing the workpiece to be released from the lower die synchronously with the upper die, completing the demolding without damage. Simultaneously, the robot places the next workpiece to be processed on the lower die, moves upward to clamp the workpiece on the upper die, and the clamping cylinder 51 drives the clamping member 52 to exit the channel 433, releasing the workpiece. The workpiece is taken out of the equipment by the robot, and the mechanism prepares for the next cycle. In this process, the driving timing of the clamping cylinder 51 is critical, usually controlled by the PLC control system to ensure that it is triggered instantaneously after the stamping action is completed and before the return stroke begins.

[0038] This equipment changes the traditional method of relying on ejector plates, robotic arms, or manual prying. It directly and smoothly pulls the workpiece out using mechanical clamping force, avoiding workpiece deformation, surface scratches, or cracks caused by poor demolding, and significantly improving the yield rate. Moreover, the demolding action is seamlessly connected with the return stroke of the main cylinder 1, greatly improving production efficiency and making it suitable for automated production lines.

[0039] like Figure 1-4 As shown, the die cutter body 43 is composed of multiple cutter body units 430. By decomposing a large, complex integral cutter body into multiple smaller pieces, the difficulty of CNC machining and heat treatment is reduced, and manufacturing accuracy is improved. Moreover, when a local cutting edge is worn or damaged, only the corresponding cutter body unit 430 needs to be replaced, without replacing the entire cutter body, which greatly reduces maintenance costs and time.

[0040] like Figure 1-4 As shown, multiple vertical baffles 421 are provided above the die fixing plate 42, forming a receiving area. An elastic component 44, composed of multiple longitudinal springs, is located within this receiving area. This receiving area creates a relatively enclosed space, effectively preventing foreign matter such as aluminum chips and oil from entering the area of ​​the elastic component 44, thus avoiding spring jamming or failure and improving the reliability and durability of the mechanism. Simultaneously, the baffles prevent the elastic component 44 from skewing, twisting, or misaligning during compression and rebound, ensuring uniform force distribution on the die fixing plate 42, smoother vertical movement, and improved stamping accuracy and die life.

[0041] like Figure 1-4 As shown, an upper die pressure head 45 for pressing the workpiece is also provided below the movable template 3. The upper die pressure head 45 is suspended on the die fixing plate 42 by a screw assembly. Before the stamping begins, the upper die pressure head 45 first presses down on the flange or non-machined area of ​​the workpiece to prevent the workpiece from moving or tilting during the stamping process, thus ensuring the accuracy of the machining dimensions and the quality of the cut surface.

[0042] like Figure 5-7 As shown, the lower section of the die fixing plate 42 is provided with a mounting groove 420, and the mounting groove 420 is provided with a mounting block 54. The clamping cylinder 51 is fixed on the outside of the mounting block 54, making full use of the longitudinal space of the die. Furthermore, the relative position between the clamping member 52 and the die cutter body 43 is fixed and unaffected by any gaps or deformations that may exist in the drive chain of the main cylinder 1. This ensures that the clamping member 52 can be accurately aligned with the channel 433 on the cutter edge 431, thereby improving the repeatability and positioning accuracy of the action.

[0043] Furthermore, it should be noted that the mold core assembly 4 itself can be replaced according to different workpieces to be processed. By setting the clamping assembly 5 on the die fixing plate 42, the entire assembly can be replaced to adapt to the clamping requirements of different workpieces, resulting in a high degree of modularity and greater ease of use. Further mounting the clamping assembly 5 on an installation block facilitates the independent replacement and adjustment of different unit components, making maintenance convenient.

[0044] like Figure 5-7 As shown, the lower part of the mounting block 54 is provided with a guide groove 540, and the clamping member 52 connected to the output end of the clamping cylinder 51 moves laterally along the guide groove 540. The guide groove 540 forms a sliding bearing pair, which eliminates the degree of freedom of the clamping member 52 during movement, retaining only the required lateral degree of freedom, providing precise guidance for the horizontal reciprocating motion of the clamping member 52, ensuring that its movement trajectory is straight and stable, and accurately passing through the channel 433, preventing interference or collision with the tool body. In addition, during clamping and lifting of the workpiece, the workpiece may exert a lateral force on the clamping member 52. The guide groove 540 can withstand and offset this force, protecting the piston rod of the clamping cylinder 51 from bending torque and extending the service life of the cylinder.

[0045] like Figure 7 As shown, the guide groove 540 includes a horizontal groove portion 541 and a vertical groove portion 542, so that the cross-section is T-shaped. The clamping member 52 includes a horizontal portion 521 and a vertical portion 522 to form a T-shaped structure adapted to the guide groove 540. The vertical portion 522 of the T-shape serves to prevent disengagement, while the horizontal portion 521 provides the main guide support surface, realizing the combination of movement and locking.

[0046] like Figure 5-7 As shown, the outer wall of the mounting block 54 is provided with an outwardly protruding transverse extension plate 55, and a stroke sensor 53 is provided below the transverse extension plate 55 to limit the stroke of the clamping member 52. The stroke sensor 53 acts as a position feedback element, feeding back the retracted signal of the clamping member 52 to the control system. Only after confirming that all clamping members 52 have safely exited the channel 433 can the main cylinder 1 perform the next downward press, preventing serious interference and playing a safety protection role.

[0047] like Figure 5-7 As shown, the stroke sensor 53 is a stroke switch, and the rear end of the clamping cylinder 51 is provided with a stroke limit block 56. When the stroke limit block 56 contacts the stroke switch, the clamping cylinder 51 stops retracting.

[0048] like Figure 5-7 As shown, the end of the clamping member 52 is bent inward to form a transverse hook 523. The transverse hook 523 can hook onto the edge of the workpiece, the inner wall of the boss or the hole, providing a greater clamping force than a flat contact, more effectively preventing the workpiece from falling off during the lifting process, and with less pressure on the workpiece surface, reducing the risk of damaging the workpiece.

[0049] This article uses specific examples to describe the aluminum die-casting precision machining upper mold mechanism provided by the present invention. The above description of the embodiments is only for the purpose of helping to understand the present invention and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A die-casting upper mold mechanism for precision machining of aluminum, characterized in that, It includes a main cylinder, a fixed template, a movable template, a mold core assembly, and a clamping assembly; the main cylinder is fixed to the fixed template and passes through the fixed template to connect with the movable template, so as to drive the movable template to move up and down; The mold core assembly includes a mold core mounting plate, a die fixing plate, a die cutter body, and an elastic component; the mold core mounting plate is mounted above the movable template, and the die fixing plate is connected to the mold core mounting plate through the elastic component; The die cutter body is fixedly disposed below the die fixing plate; the die cutter body includes a blade edge and at least one internal region enclosed by the blade edge. The clamping assembly includes multiple clamping units fixed below the movable template. Each clamping unit is located around the punch die body and includes a clamping cylinder and a clamping member driven by the clamping cylinder. The blade edge is provided with a channel, and the clamping member is driven by the clamping cylinder to extend into or retract from the channel. When the die cutter body acts on the workpiece, the clamping cylinder drives the clamping member to enter the internal area from the channel to clamp the workpiece; When the main cylinder drives the movable template to rise, the workpiece moves upward synchronously with the movable template to disengage from the lower mold.

2. The upper mold mechanism for precision machining of aluminum die casting according to claim 1, characterized in that, The die fixing plate is provided with multiple vertical partitions above it, which enclose a receiving area, and the elastic component is located in the receiving area.

3. The upper mold mechanism for precision machining of aluminum die casting according to claim 3, characterized in that, The lower section of the die fixing plate is provided with a mounting groove, the mounting groove is provided with a mounting block, and the clamping cylinder is fixed to the outside of the mounting block.

4. The upper mold mechanism for precision machining of aluminum die casting according to claim 3, characterized in that, The lower part of the mounting block is provided with a guide groove, and the clamping member connected to the output end of the clamping cylinder moves laterally along the guide groove.

5. The upper mold mechanism for precision machining of aluminum die casting according to claim 1, characterized in that, The outer side wall of the mounting block is provided with an outwardly protruding lateral extension plate, and a stroke sensor is provided below the lateral extension plate to limit the stroke of the clamping member.

6. The upper mold mechanism for precision machining of aluminum die casting according to claim 3, characterized in that, The guide groove includes a horizontal groove and a vertical groove to make the cross-section T-shaped; the clamping member includes a horizontal part and a vertical part to form a T-shaped structure adapted to the guide groove.

7. The upper mold mechanism for precision machining of aluminum die casting according to claim 1, characterized in that, The end of the clamping member is bent inward to form a horizontal hook.

8. The upper mold mechanism for precision machining of aluminum die casting according to claim 5, characterized in that, The stroke sensor is a stroke switch, and the rear end of the clamping cylinder is provided with a stroke limit block. When the stroke limit block contacts the stroke switch, the clamping cylinder stops retracting.

9. The upper mold mechanism for precision machining of aluminum die casting according to claim 5, characterized in that, The die body is composed of multiple die body units spliced ​​together.

10. The upper mold mechanism for precision machining of aluminum die casting according to claim 5, characterized in that, Below the movable template is also a pressing head for pressing the workpiece.

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