Automatic trimming device for metal die casting

Abstract

The automatic trimming device comprises a workbench, a plurality of guide grooves are evenly formed in the workbench in the circumferential direction, the two opposite sides of each guide groove are slidably connected with an outer fixing piece and an inner fixing piece correspondingly, and fixing air cylinders corresponding to the outer fixing pieces one to one are arranged on the outer surface of the workbench; piston rods of the fixing air cylinders are arranged on the outer fixing pieces, a driving assembly and a switching assembly are arranged on the workbench, the driving assembly drives the multiple inner fixing pieces to synchronously move along the guide grooves, and the switching assembly is used for driving the outer fixing pieces or the inner fixing pieces to be separated from the workpieces. The edge trimming device has the effect of improving the edge trimming efficiency.

Description

Technical Field

[0001] This application relates to the field of die casting equipment technology, and in particular to an automatic trimming device for metal die castings. Background Technology

[0002] In modern manufacturing, metal die casting has become an important technical means for producing various metal parts due to its high efficiency and high precision. This process involves injecting molten metal into a mold cavity under high pressure, which is then cooled and solidified to form the part. It is widely used in the automotive, aerospace, and machinery manufacturing industries. Among these, circular metal die castings are one of the most common die casting products and are widely used in key mechanical components such as bearings, gears, and piston rings, undertaking important functions such as transmission, sealing, and support.

[0003] However, due to factors such as mold wear, differences in material flowability, and limitations in equipment precision, defects such as flash and burrs inevitably appear on the surface of the die-cast ring after demolding. These defects not only affect the appearance quality of the die-cast parts, but also lead to a decrease in the fitting accuracy of components during mechanical assembly, and may even cause equipment malfunctions. Therefore, it is necessary to use a trimming device to repair its surface.

[0004] Currently, to ensure constant contact between the trimmed part and the annular surface during the trimming process, existing trimming devices typically use multiple circumferentially evenly arranged fixing plates as fixing components. A driving device presses these fixing plates against the surface of the annular metal die-casting part to secure it. However, in practice, since both the inner and outer surfaces of the annular metal die-casting part require trimming, after trimming one side of the die-casting part, the operator needs to remove the annular metal part and readjust the position of the fixing components to secure the other side of the annular surface. This operation requires workers to spend a significant amount of time adjusting the position of the fixing components multiple times, which is time-consuming and labor-intensive, reducing the trimming efficiency of the metal die-casting part and exhibiting significant shortcomings. Summary of the Invention

[0005] To improve the trimming efficiency of metal die castings, this application provides an automatic trimming device for metal die castings.

[0006] The automatic trimming device for die-cast metal parts provided in this application adopts the following technical solution: An automatic trimming device for die-cast metal parts includes a worktable with trimming devices for trimming. The worktable has multiple guide grooves evenly spaced circumferentially, parallel to its radial direction. Each guide groove has an outer fixing component and an inner fixing component slidably connected to opposite sides. A fixing cylinder, corresponding to each of the outer fixing components, is located on the outer surface of the worktable. The piston rod of each fixing cylinder is mounted on the outer fixing component. The worktable includes a drive assembly and a switching assembly. The drive assembly drives the inner fixing components to move synchronously along the guide grooves, and the switching assembly drives either the outer or inner fixing component to detach from the workpiece.

[0007] By adopting the above technical solution, the metal die-casting part is placed on the worktable. The worker starts the drive assembly and the fixing cylinder. The drive assembly drives multiple inner fixing parts to simultaneously abut against the inner surface of the workpiece, and the outer fixing parts to simultaneously abut against the outer surface of the workpiece. When the outer surface of the workpiece needs to be processed, the switching assembly drives the outer fixing parts to detach from the workpiece and cancel the fixation, while the inner fixing parts remain fixed. When the inner surface of the workpiece needs to be processed, the switching assembly drives the inner fixing parts to detach from the workpiece and cancel the fixation, while the outer fixing parts return to the fixed state. This avoids the inner or outer fixing parts affecting the trimming of the workpiece. The setting of the switching assembly, inner fixing assembly, and outer fixing assembly allows the worker to achieve continuous trimming of the inner and outer surfaces of the workpiece with only one clamping, without the need for the worker to remove the ring and adjust the fixing position multiple times, thus improving the trimming efficiency of the metal die-casting part.

[0008] Optionally, the workbench has a drive cavity communicating with the multiple guide slots. The drive assembly includes a stud rotatably connected in the drive cavity. A drive block is threadedly connected to the outer surface of the stud. A drive frame corresponding to each of the multiple inner fixing members is hinged to the outer surface of the drive block. One end of the drive frame away from the drive block is hinged to the corresponding inner fixing member. A fixed motor for driving the stud to rotate is provided in the drive cavity.

[0009] By adopting the above technical solution, the fixed motor drives the stud to rotate. Under the guidance and limitation of multiple guide grooves, the rotation of the stud drives the drive block to move along the axial direction toward the surface of the worktable. The movement of the drive block drives the drive frame to rotate away from the stud. The rotation of the drive frame pushes multiple inner fixing parts to move synchronously and finally abut against the inner surface of the workpiece. In this way, the workpiece is fixed from the inside. At the same time, during the movement of the inner fixing parts, the axis of the workpiece is gradually aligned with the axis of the stud, thus achieving the centering and fixing of the workpiece.

[0010] Optionally, both the inner and outer fixing components include a connecting shell slidably connected within the guide groove. The connecting shell is slidably connected with a fixing block for limiting the workpiece along the direction of the stud axis. An ejector spring is sleeved on the outer surface of the fixing block. The elastic force of the ejector spring drives the fixing block to move away from the driving cavity. The switching component overcomes the elastic force of the ejector spring and drives the fixing plate to retract into the connecting shell.

[0011] By adopting the above technical solution, when the inner fastener or outer fastener is in a fixed state, the elastic force of the ejector spring drives the fixing block to extend out of the connecting shell to the surface of the worktable. The drive assembly or fixing cylinder drives the fixing block to move to a position where it abuts against the workpiece, thereby achieving fixation. When it is necessary to remove the fixation of the inner or outer fastener, the switching assembly overcomes the elastic force of the ejector spring and pulls the fixing block back into the connecting shell. At this time, the fixing block is detached from the workpiece surface, thereby removing the limitation on fixation and avoiding interference with the movement trajectory of the trimming part. This achieves an elastic telescopic fixing structure, facilitating the switching of the fixed state.

[0012] Optionally, the switching assembly includes a switching block rotatably connected within the connecting housing. A first magnetic block is embedded in the switching block, and a second magnetic block magnetically attracted to the first magnetic block is disposed on the bottom surface of the fixing block. The second magnetic blocks on two switching blocks located in the same guide groove are positioned on opposite sides. When the first magnetic block and the second magnetic block are facing each other, the first magnetic block overcomes the elastic force of the ejection spring and attracts the second magnetic block. The fixing block retracts into the connecting housing. A rotating assembly is disposed within the driving cavity to drive multiple switching blocks to rotate synchronously by 180°.

[0013] By adopting the above technical solution, when the rotating assembly drives multiple switching blocks to rotate 180° synchronously, the second magnetic block near the connecting shell rotates to the side opposite to the connecting shell. At this time, the attraction force of the second magnetic block on the first magnetic block disappears, and the ejector spring resets and pushes the fixing block to extend out of the connecting shell, thereby achieving fixation. The second magnetic block away from the connecting shell rotates to directly below the fixing block. At this time, the second magnetic block overcomes the elastic force of the ejector spring and attracts the first magnetic block. The first magnetic block pulls the fixing block downward until it is fully embedded inside the connecting shell. This makes the fixing effect of the fixing block disappear. The setting of the switching assembly and the rotating assembly realizes the alternating fixation of the inner and outer fixing parts, so that the workers do not need to frequently adjust the position of the inner and outer fixing parts through the driving assembly and the driving cylinder, further improving the efficiency of trimming.

[0014] Optionally, a limiting groove is provided on the inner sidewall of the connecting shell, and a limiting ring is provided on the outer surface of the fixing block to slide in cooperation with the limiting groove. One end of the ejection spring is provided on the limiting ring, and the other end is provided on the inner sidewall of the limiting groove.

[0015] By adopting the above technical solution, the sliding fit between the limiting groove and the limiting ring restricts the sliding distance of the fixed block in the connecting shell, while providing a guiding effect for the movement of the fixed block, ensuring that the fixed block can smoothly extend and retract along the connecting shell.

[0016] Optionally, the rotating assembly includes multiple switching shafts rotatably connected within the drive cavity. The multiple switching shafts are correspondingly arranged with multiple guide grooves. Each switching shaft has a moving groove along its axial direction. A moving block is provided on the switching block and slidably engages with the moving groove. The switching block is slidably sleeved on the switching shaft. A gear is coaxially provided at one end of each switching shaft. A gear ring is rotatably connected inside the drive cavity and meshes with the multiple gears. A paddle is provided on the outer surface of the gear ring. A paddle groove is provided on the worktable and slidably engages with the paddle. When the paddle moves from one end of the paddle groove to the other end, the gear ring drives the gear to rotate 180°.

[0017] By adopting the above technical solution, when switching is required, the worker moves the dial block from one end of the dial slot to the other end. The dial block slides and drives the gear ring to rotate inside the drive cavity. The gear ring drives multiple switching shafts to rotate synchronously by 180° through meshing gears. With the connection of the moving block and the moving slot, the switching shaft drives the two switching blocks on its shaft to rotate by 180°. At this time, the second magnetic block near the connecting shell rotates to the side away from the first magnetic block, and the fixing block extends out. The second magnetic block away from the connecting shell rotates to the side directly below the first magnetic block, and the fixing block is embedded inside the connecting shell. In this way, the synchronous switching of the fixed states of multiple inner and outer fixing parts is realized, and the whole process only requires the worker to move the dial block, which further improves the trimming efficiency.

[0018] Optionally, locking components are provided on both opposite sides of the slot. Each locking component includes a locking block. A receiving groove is formed on the inner wall of the slot to slide with the locking block. A retaining spring is provided in the receiving groove. One end of the retaining spring is provided on the locking block, and the other end is provided on the inner wall of the receiving groove away from the arc groove. A locking groove is formed on the block to insert with the locking block. The elastic force of the retaining spring presses the locking block against the locking groove. A pushing block is provided on the locking block. A pushing groove is formed on the worktable to slide with the pushing block. The pushing groove communicates with the receiving groove.

[0019] By adopting the above technical solution, when the worker pulls the dial block to the end of the dial groove, the worker overcomes the elastic force of the clamping spring and pulls the push block. The push block drives the locking block to embed into the receiving groove. Then the worker continues to push the dial block until the locking groove moves directly below the locking block. The worker then releases the force on the push block, and the clamping spring pushes the locking block to insert into the locking groove. Under the limit of the locking block, the position of the dial block in the dial groove is fixed, thereby restricting the rotation of the gear ring. This ensures the stability of the position of the switching block on the switching shaft, reduces the possibility of the switching block rotating on its own due to equipment vibration or worker accidental contact during the trimming process, and ensures the fixing effect of the inner or outer fixing parts during trimming.

[0020] Optionally, the locking block is provided with a guide slope, the guide slope is inclined from bottom to top along the direction close to the center of the slot, and the two sides opposite to the block are provided with pushing slopes that slide with the guide slope.

[0021] By adopting the above technical solution, when the push block moves to abut against the guide slope, as the push groove continues to move, it pushes the slope to slide along the guide slope. The sliding cooperation between the push slope and the guide slope converts the horizontal displacement of the push block into the vertical displacement of the locking block, so that the locking block automatically retracts into the receiving groove without manual intervention. This shortens the worker's operation time and further improves the trimming efficiency.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The embodiments of this application, by setting an inner fixing component, an outer fixing component, and a switching component, enable the worker to continuously trim the inner and outer surfaces of the workpiece with only one clamping, without the worker having to remove the ring and adjust the fixed position multiple times, thus improving the trimming efficiency of metal die castings. 2. This application achieves alternating fixation of the inner and outer fixing parts by setting up a rotating component and a switching component. This eliminates the need for workers to frequently adjust the position of the inner and outer fixing parts through the drive component and drive cylinder, further improving the efficiency of trimming. 3. By setting a locking component, the position of the shift block in the shift groove is fixed under the limit of the locking block, thereby restricting the rotation of the gear ring, thus ensuring the stability of the position of the shift block on the shift shaft, reducing the possibility of the shift block rotating on its own due to equipment vibration or accidental touch by the worker during the trimming process, and ensuring the fixing effect of the inner or outer fixing parts during trimming. Attached Figure Description

[0023] Figure 1 This is a structural diagram of this application.

[0024] Figure 2 This is a cross-sectional view of the workbench in an embodiment of this application.

[0025] Figure 3 This is a schematic diagram of the switching component in an embodiment of this application.

[0026] Figure 4 This is a cross-sectional view of the connecting shell in an embodiment of this application.

[0027] Figure 5 This is a schematic diagram of the locking component in an embodiment of this application.

[0028] Figure 6 This is a schematic diagram of the rotating component in an embodiment of this application.

[0029] Explanation of reference numerals in the attached drawings: 01, workpiece; 1, worktable; 2, gantry frame; 21, trimming device; 3, guide groove; 4, external fixing component; 41, fixing cylinder; 5, internal fixing component; 51, connecting shell; 511, limiting groove; 52, fixing block; 521, limiting ring; 53, ejection spring; 6, drive cavity; 7, drive assembly; 71, stud; 72, drive block; 73, drive frame; 74, fixed motor; 8, switching assembly; 81. Switching block; 811, Moving block; 82, First magnetic block; 83, Second magnetic block; 9, Rotating assembly; 91, Switching shaft; 911, Moving groove; 92, Gear; 93, Gear ring; 94, Toggle block; 941, Locking groove; 942, Pushing inclined surface; 10, Toggle groove; 101, Receiving groove; 102, Pushing groove; 11, Locking assembly; 111, Locking block; 1111, Guide inclined surface; 112, Abutting spring; 113, Pushing block. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0031] This application discloses an automatic trimming device for metal die castings.

[0032] Reference Figure 1 An automatic trimming device for metal die castings includes a worktable 1, on which a circular metal die casting workpiece 01 is placed. A gantry frame 2 is fixedly installed on the worktable 1, and a trimming device 21 for trimming is fixedly installed on the gantry frame 2. In this embodiment, the trimming device 21 includes a multi-axis robotic arm, and a trimming head is installed at the free end of the multi-axis robotic arm. The specific working principle of the trimming device 21 is prior art and will not be described in detail here.

[0033] Reference Figure 2 and Figure 3The worktable 1 is cylindrical in shape. Multiple guide grooves 3 are evenly distributed on the surface of the worktable 1 along the circumference. In this embodiment, there are four guide grooves 3. Each guide groove 3 is parallel to the radial direction of the worktable 1. The cross-sectional shape of the guide groove 3 is T-shaped. Each guide groove 3 has an outer fixing member 4 and an inner fixing member 5 slidably connected on opposite sides. The outer fixing member 4 is used to fix the outer circumference of the workpiece 01, and the inner fixing member 5 is used to fix the inner circumference of the workpiece 01.

[0034] Reference Figure 2 and Figure 3 Both the inner fixing member 5 and the outer fixing member 4 include a connecting shell 51 that is slidably connected in the guide groove 3. The cross-section of the connecting shell 51 is T-shaped to prevent it from detaching from the guide groove 3. The surface of the connecting shell 51 is flush with the surface of the worktable 1. The connecting shell 51 is slidably connected with a fixing block 52 for limiting the workpiece 01 along the axial direction of the worktable 1. The fixing block 52 is cylindrical. A limiting ring 521 is fixedly connected to the outer surface of the fixing block 52. A limiting groove 511 that slides with the limiting ring 521 is opened on the inner side wall of the connecting shell 51. An ejection spring 53 is sleeved on the outer surface of the fixing block 52. One end of the ejection spring 53 is fixedly connected to the surface of the limiting ring 521, and the other end is fixedly connected to the end of the limiting groove 511 away from the drive cavity 6. The elastic force of the ejection spring 53 drives the fixing block 52 to extend to the outer surface of the connecting shell 51 and abut against the surface of the workpiece 01.

[0035] Reference Figure 2 The outer surface of the workbench 1 is fixedly equipped with four fixed cylinders 41 corresponding to the four external fixed parts 4. The piston rod of the fixed cylinder 41 extends into the guide groove 3 and is fixedly connected to the connecting shell 51 of the external fixed part 4. When the workpiece 01 is placed on the surface of the workbench 1, the worker starts the four fixed cylinders 41 simultaneously. The four fixed cylinders 41 push the external fixed part 4 to slide along the guide groove 3 until the fixed block 52 abuts against the outer periphery of the workpiece 01, so that the trimming device 21 can trim the inner surface of the workpiece 01.

[0036] Reference Figure 2 The workbench 1 has a drive cavity 6 inside, and a drive assembly 7 is installed inside the drive cavity 6. The drive assembly 7 includes a stud 71 rotatably connected inside the drive cavity 6. The axis of the stud 71 is parallel to the axis of the workbench 1. A drive block 72 is threadedly connected to the outer surface of the stud 71. A drive frame 73 corresponding to the four inner fixing parts 5 is hinged to the outer surface of the drive block 72. In this embodiment, the drive frame 73 includes two drive rods (not shown in the figure) hinged to the outer surface of the drive block 72. The two drive rods are symmetrically distributed about the axis of the guide groove 3. The end of each drive rod away from the drive block 72 is hinged to the opposite sides of the connecting shell 51 in the inner fixing part 5. A clearance groove (not shown in the figure) is provided on the bottom wall of the guide groove 3 for the drive rod to slide. A fixed motor 74 is fixedly installed inside the drive cavity 6. The output shaft of the fixed motor 74 is coaxially fixedly connected to the stud 71.

[0037] When workpiece 01 is placed on the surface of workbench 1, the worker starts the fixing cylinder 41 and the fixing motor 74 at the same time. The fixing motor 74 drives the stud 71 to rotate. Under the guidance and limitation of multiple guide grooves 3, the rotation of stud 71 drives the drive block 72 to move along the axial direction toward the surface of workbench 1. The movement of drive block 72 drives drive frame 73 to rotate away from stud 71. The rotation of drive frame 73 pushes multiple inner fixing parts 5 to move synchronously and finally abut against the inner surface of workpiece 01. In this way, workpiece 01 is fixed from the inside. At the same time, during the movement of inner fixing parts 5, the axis of workpiece 01 is gradually aligned with the axis of stud 71, thus achieving the centering and fixing of workpiece 01.

[0038] Reference Figure 2 , Figure 3 and Figure 4 In order to avoid the effect of the fixing block 52 on the trimming trajectory of the trimming device 21 when fixing the workpiece 01, each connecting shell 51 is provided with a switching component 8. The switching component 8 drives the fixing block 52 in the inner fixing member 5 or the outer fixing member 4 to disengage from the surface of the workpiece 01 and retract into the connecting shell 51 by overcoming the elastic force of the ejection spring 53.

[0039] When the outer surface of workpiece 01 needs to be processed, the switching component 8 drives the outer fixing part 4 to disengage from workpiece 01 and cancels the fixation, while the inner fixing part 5 remains fixed. When the inner surface of workpiece 01 needs to be processed, the switching component 8 drives the inner fixing part 5 to disengage from workpiece 01 and cancels the fixation, while the outer fixing part 4 returns to the fixed state. This avoids the inner fixing part 5 or the outer fixing part 4 affecting the trimming of workpiece 01. As a result, the worker only needs to clamp once to achieve continuous trimming of the inner and outer surfaces of workpiece 01, without the need for the worker to remove the ring and adjust the fixed position multiple times, thus improving the trimming efficiency of metal die castings.

[0040] Reference Figure 2 , Figure 3 and Figure 4The switching assembly 8 includes a switching block 81 rotatably connected within a connecting shell 51. The outer surface of the switching block 81 abuts against the inner surface of the connecting shell 51. When the connecting shell 51 slides along the guide groove 3, it drives the switching block 81 to move. A first magnetic block 82 is embedded in the switching block 81. A second magnetic block 83, which is magnetically attracted to the first magnetic block 82, is fixedly connected to the bottom surface of the fixing block 52. The first magnetic block 82 and the second magnetic block 83 are arc-shaped to fit the switching block 81. When the first magnetic block 82 and the second magnetic block 83 are aligned, The first magnetic block 82 overcomes the elastic force of the ejection spring 53 to attract the second magnetic block 83. The fixing block 52 completely detaches from the workpiece 01 and retracts into the connecting shell 51. In the initial state, the second magnetic blocks 83 on the two switching blocks 81 located in the same guide groove 3 are on opposite sides of the axis of the switching blocks 81, so as to realize the alternating fixation of the inner fixing member 5 and the outer fixing member 4. In this embodiment, initially, the fixing block 52 in the inner fixing member 5 detaches from the workpiece 01, and the fixing block 52 of the outer fixing member 4 abuts against the outer surface of the workpiece 01.

[0041] Reference Figure 3 , Figure 5 and Figure 6 The drive cavity 6 is provided with a rotating assembly 9, which includes multiple switching shafts 91 rotatably connected in the drive cavity 6. The multiple switching shafts 91 are correspondingly arranged with multiple guide grooves 3. In this embodiment, there are four switching shafts 91, each of which is located directly below the corresponding guide groove 3 and is parallel to the radial direction of the worktable 1.

[0042] Reference Figure 3 , Figure 5 and Figure 6 The switching shaft 91 has a moving groove 911 along its own axis. The switching block 81 is fixedly connected to the moving block 81, which slides with the moving groove 911. The switching block 81 is slidably sleeved on the switching shaft 91. With the connection between the moving block 811 and the moving groove 911, the switching block 81 rotates with the switching shaft 91. Each switching shaft 91 is coaxially fixedly connected to a gear 92 at one end away from the center of the worktable 1. The drive cavity 6 is rotatably connected to a gear ring 93 that meshes with the four gears 92. A lever 94 is fixedly connected to the outer surface of the gear ring 93. A lever groove 10 that slides with the lever 94 is opened on the outer surface of the worktable 1. When the lever 94 moves from one end of the lever groove 10 to the other end, the gear ring 93 drives the gear ring 93 to rotate 180°.

[0043] After the workpiece 01 is placed on the worktable 1, the fixed cylinder 41 and the fixed motor 74 drive the inner fixed part 5 and the outer fixed part 4 to move to the fixed position respectively. When the connecting shell 51 moves, it drives the switching block 81 to slide on the surface of the switching shaft 91. The fixing block 52 in the inner fixed part 5 is separated from the workpiece 01, and the fixing block 52 of the outer fixed part 4 abuts against the outer surface of the workpiece 01. The trimming device 21 trims the inner surface of the workpiece 01. After the inner surface is trimmed, the worker moves the lever 94 from one end of the lever groove 10 to the other end. The lever 94 slides and drives the gear ring 93 to rotate inside the drive cavity 6. The gear ring 93 drives the four switching shafts 91 to rotate 180° synchronously through the meshing gear 92. With the connection of the moving block 811 and the moving groove 911, the switching shaft 91 drives the two switching blocks 81 on its shaft to rotate 180°. At this time, the second magnetic block 83 in the inner fixing part 5 rotates to the side away from the first magnetic block 82. The attraction force of the second magnetic block 83 on the first magnetic block 82 disappears. The push spring 53 resets and pushes the fixing block 52 to extend out of the connecting shell 51 and abut against the inner surface of the workpiece 01, thereby achieving the internal fixation of the workpiece 01. At the same time, the second magnetic block 83 of the four external fasteners rotates directly below the first magnetic block 82. The second magnetic block 83 overcomes the elastic force of the ejector spring 53 and attracts the first magnetic block 82. The first magnetic block 82 pulls the fixing block 52 downward until it is fully embedded in the connecting shell 51. At this time, the fixing block 52 of the external fastener 4 is separated from the workpiece 01. The trimming device 21 trims the outer surface of the workpiece 01. The setting of the rotating component 9 and the switching component 8 realizes the synchronous switching of the fixing states of multiple internal fasteners 5 and external fasteners 4. Moreover, the entire process only requires the worker to move the lever 94, which further improves the trimming efficiency.

[0044] Reference Figure 3 , Figure 5 and Figure 6 Locking components 11 are provided on both sides of the groove 10. Each locking component 11 includes a locking block 111. A receiving groove 101 is provided on the inner wall of the groove 10 to slide with the locking block 111. A pressing spring 112 is provided in the receiving groove 101. One end of the pressing spring 112 is fixedly connected to the locking block 111, and the other end is fixedly connected to the inner wall of the receiving groove 101 away from the arc groove. A locking groove 941 is provided on the lever 94 to engage with the locking block 111. The elastic force of the pressing spring 112 presses the locking block 111 against the locking groove 941.

[0045] Reference Figure 3 , Figure 5 and Figure 6The locking block 111 is provided with a guide slope 1111. The guide slope 1111 is inclined from bottom to top along the direction close to the center of the slot 10. The two sides of the lever 94 are provided with a pushing slope 942 that slides with the guide slope 1111. The horizontal displacement of the lever 94 is converted into the vertical displacement of the locking block 111 by the sliding cooperation between the pushing slope 942 and the guide slope 1111.

[0046] Reference Figure 3 , Figure 5 and Figure 6 A push block 113 is fixedly connected to the locking block 111, and a push groove 102 is provided on the worktable 1 to slide with the push block 113. The push groove 102 is connected to the receiving groove 101.

[0047] When it is necessary to switch to the fixed state, the worker pulls the lever 94 toward the end of the slot 10. When the lever 94 moves to abut against the guide slope 1111, the lever 94 overcomes the elastic force of the clamping spring 112 and drives the locking block 111 to be inserted into the receiving groove 101. Then the worker continues to push the lever 94 until the locking groove 941 moves to the bottom of the locking block 111. The clamping spring 112 pushes the locking block 111 to be inserted into the locking groove 941. Under the limit of the locking block 111, the position of the lever 94 in the slot 10 is fixed, thereby restricting the rotation of the gear ring 93, thus ensuring the stability of the position of the switching block 81 on the switching shaft 91, and reducing the possibility of the switching block 81 rotating on its own due to equipment vibration or worker accidental touch during the trimming process. When the lever 94 needs to be rotated again, the worker overcomes the elastic force of the clamping spring 112 and pulls the push block 113. The push block 113 drives the locking block 111 to be inserted into the receiving groove 101. At this time, the locking block 111 loses its fixation on the lever 94, and the worker pulls the lever 94 to move it to the other side of the lever groove 10.

[0048] The implementation principle of the automatic trimming device for metal die castings in this application embodiment is as follows: The metal die casting is placed on the workbench 1. The worker starts the drive assembly 7 and the fixing cylinder 41. The drive assembly 7 drives multiple inner fixing parts 5 to simultaneously abut against the inner surface of the workpiece 01, and the outer fixing parts simultaneously abut against the outer surface of the workpiece 01. When it is necessary to process the outer surface of the workpiece 01, the switching assembly 8 drives the outer fixing part 4 to detach from the workpiece 01 to cancel the fixation, and the inner fixing part 5 remains fixed. When it is necessary to process the inner surface of the workpiece 01, the switching assembly 8 drives the inner fixing part 5 to detach from the workpiece 01 to cancel the fixation, and the outer fixing part 4 returns to the fixed state, so as to avoid the inner fixing part 5 or the outer fixing part 4 affecting the trimming of the workpiece 01. The setting of the switching assembly 8, the inner fixing assembly and the outer fixing assembly allows the worker to achieve continuous trimming of the inner and outer surfaces of the workpiece 01 with only one clamping, without the worker having to remove the ring and adjust the fixed position multiple times, thus improving the trimming efficiency of the metal die casting.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic trimming device for die-cast metal parts, comprising a worktable (1), wherein a trimming device (21) for trimming is provided on the worktable (1), characterized in that, The worktable (1) is provided with a plurality of guide grooves (3) evenly distributed along the circumference. The guide grooves (3) are parallel to the radial direction of the worktable (1). Each guide groove (3) is slidably connected to an outer fixing member (4) and an inner fixing member (5) on opposite sides. The outer surface of the worktable (1) is provided with a fixing cylinder (41) corresponding to the plurality of outer fixing members (4). The piston rod of the fixing cylinder (41) is provided on the outer fixing member (4). The worktable (1) is provided with a drive assembly (7) and a switching assembly (8). The drive assembly (7) drives the plurality of inner fixing members (5) to move synchronously along the guide grooves (3). The switching assembly (8) is used to drive the outer fixing member (4) or the inner fixing member (5) to detach from the workpiece (01).

2. The automatic trimming device for metal die castings according to claim 1, characterized in that, The workbench (1) has a drive cavity (6) that communicates with multiple guide slots (3). The drive assembly (7) includes a stud (71) rotatably connected in the drive cavity (6). The outer surface of the stud (71) is threaded with a drive block (72). The outer surface of the drive block (72) is hinged with a drive frame (73) that corresponds one-to-one with multiple inner fixing parts (5). One end of the drive frame (73) away from the drive block (72) is hinged to the corresponding inner fixing part (5). The drive cavity (6) is provided with a fixed motor (74) that drives the stud (71) to rotate.

3. The automatic trimming device for metal die castings according to claim 1, characterized in that, Both the inner fixing member (5) and the outer fixing member (4) include a connecting shell (51) slidably connected in the guide groove (3). The connecting shell (51) is slidably connected with a fixing block (52) for limiting the workpiece (01) along the axis of the stud (71). An ejector spring (53) is sleeved on the outer surface of the fixing block (52). The elastic force of the ejector spring (53) drives the fixing block (52) to move away from the drive cavity (6). The switching assembly (8) overcomes the elastic force of the ejector spring (53) and drives the fixing plate to retract into the connecting shell (51).

4. The automatic trimming device for metal die castings according to claim 3, characterized in that, The switching assembly (8) includes a switching block (81) rotatably connected to the connecting shell (51). A first magnetic block (82) is embedded in the switching block (81). A second magnetic block (83) magnetically attracted to the first magnetic block (82) is provided on the bottom surface of the fixing block (52). The second magnetic blocks (83) on the two switching blocks (81) located in the same guide groove (3) are on opposite sides. When the first magnetic block (82) and the second magnetic block (83) are facing each other, the first magnetic block (82) overcomes the elastic force of the ejection spring (53) and attracts the second magnetic block (83). The fixing block (52) retracts into the connecting shell (51). A rotating assembly (9) is provided in the driving cavity (6) to drive multiple switching blocks (81) to rotate synchronously by 180°.

5. The automatic trimming device for metal die castings according to claim 4, characterized in that, The inner wall of the connecting shell (51) is provided with a limiting groove (511), and the outer surface of the fixing block (52) is provided with a limiting ring (521) that slides with the limiting groove (511). One end of the ejection spring (53) is provided on the limiting ring (521), and the other end is provided on the inner wall of the limiting groove (511).

6. The automatic trimming device for metal die castings according to claim 5, characterized in that, The rotating assembly (9) includes a plurality of switching shafts (91) rotatably connected within the drive cavity (6). The plurality of switching shafts (91) are correspondingly arranged with a plurality of guide grooves (3). Each switching shaft (91) has a moving groove (911) along its axial direction. A moving block (81) is provided on each switching block (81) that slides within the moving groove (911). The switching block (81) is slidably fitted onto the switching shaft (91). Each switching shaft (91)... 1) One end of each gear (92) is coaxially provided. The drive cavity (6) is rotatably connected to a gear ring (93) that meshes with the multiple gears (92). The outer surface of the gear ring (93) is provided with a paddle (94). The worktable (1) is provided with a paddle groove (10) that slides with the paddle (94). When the paddle (94) moves from one end of the paddle groove (10) to the other end, the gear ring (93) drives the gear (92) to rotate 180°.

7. The automatic trimming device for metal die castings according to claim 6, characterized in that, Locking components (11) are provided on both opposite sides of the groove (10). Each locking component (11) includes a locking block (111). A receiving groove (101) is provided on the inner wall of the groove (10) to slide with the locking block (111). A retaining spring (112) is provided in the receiving groove (101). One end of the retaining spring (112) is provided on the locking block (111), and the other end is provided in the receiving groove (101) away from the arc groove. On the side wall, the lever (94) is provided with a locking groove (941) that is inserted and engaged with the locking block (111). The elastic force of the clamping spring (112) presses the locking block (111) against the locking groove (941). The locking block (111) is provided with a pushing block (113). The worktable (1) is provided with a pushing groove (102) that is slidably engaged with the pushing block (113). The pushing groove (102) is connected to the receiving groove (101).

8. The automatic trimming device for metal die castings according to claim 7, characterized in that, The locking block (111) is provided with a guide slope (1111), and the guide slope (1111) is inclined from bottom to top along the direction close to the center of the groove (10). The two sides opposite to the lever block (94) are provided with pushing slopes (942) that slide with the guide slope (1111).

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