Stamping machine tooling fixtures

Abstract

This invention provides a fixture for stamping, including a fixed base and a fixture assembly. The fixed base is equipped with a disassembly / assembly mechanism, and its top surface is connected to the fixture assembly via this mechanism. The fixture assembly includes a lower die and a base fixed to the bottom of the lower die. The lower die has a cavity with a top opening, and an upper die is positioned above it. The stamping machine drives the upper die to move up and down, pressing it into or out of the cavity. A cover is also included, connected to a rotary adjustment mechanism mounted on the base. The rotary adjustment mechanism drives the cover to rotate, covering or removing it from the top of the cavity. The disassembly / assembly mechanism enables quick connection and separation of the fixture assembly and the fixed base, simplifying the assembly / disassembly process. It allows for rapid replacement of fixture assemblies of corresponding specifications for different shapes of precision aluminum alloy forgings.

Description

Technical Field

[0001] This invention relates to the field of stamping machine technology, and in particular to fixtures for stamping machine processing. Background Technology

[0002] Precision aluminum alloy forgings are widely used in high-end manufacturing fields such as machinery manufacturing, aerospace, and automotive parts due to their lightweight, excellent mechanical properties, and high forming accuracy. The manufacturing of precision aluminum alloy forgings involves using a stamping fixture to hold and press aluminum alloy blanks to forge them into shape. In existing stamping processing technology, the main body of the fixture is often rigidly fixed to the stamping machine table directly with multiple sets of bolts, which is time-consuming and labor-intensive to disassemble and replace. For precision aluminum alloy forgings of different shapes and specifications, it is not possible to quickly disassemble and replace the fixture when changing to a suitable one, which greatly reduces the changeover efficiency of stamping processing and affects the progress of mass production. During the transfer and storage of the fixture after disassembly, the cavity of the lower die is in a completely open state without a protective structure. External dust, metal shavings, oil and other foreign objects can easily enter the cavity, which will contaminate the inner wall of the cavity, affect the forming accuracy of the aluminum alloy billet, and increase the later maintenance costs. Manually closing the cavity will increase the number of steps for disassembling and replacing the fixture, which cannot meet the needs of efficient production. Therefore, a jig for stamping is provided to address the above-mentioned problems. Summary of the Invention

[0003] This invention provides a fixture for stamping machine processing to solve the technical problems of inconvenient fixture assembly and disassembly and lack of protection for the mold cavity during storage. The present invention solves the above-mentioned technical problems through the following technical solutions: This invention provides a fixture for stamping, including a fixed base and a fixture assembly; the fixed base is provided with a disassembly and assembly mechanism, and the top surface of the fixed base is connected to the fixture assembly through the disassembly and assembly mechanism; the fixture assembly includes a lower die and a base fixed to the bottom of the lower die, the lower die has a cavity with a top opening, and an upper die is provided above the lower die; the stamping machine is used to drive the upper die to move up and down, so that the upper die is pressed into or out of the cavity; it also includes a cover, the cover is connected to a rotary adjustment mechanism, and the rotary adjustment mechanism is mounted on the base; the rotary adjustment mechanism is used to drive the cover to rotate, so that the cover covers or moves away from the top of the closed cavity. Preferably, the disassembly and assembly mechanism includes a central shaft; both ends of the central shaft are fixed with a stud, and the threads of the two studs are in opposite directions; the studs are rotatably connected to a second frame fixed to the bottom of the base, and both studs are threaded with nut seats, and a pressure seat is fixed on the nut seat, and the bottom of the pressure seat is slidably connected to a guide groove opened on the base; a worm gear is fixedly sleeved in the middle of the central shaft, and the worm gear meshes with a worm; the worm is rotatably connected to a first frame fixed to the bottom of the base, and a handwheel is fixed to one end of the worm; an insertion block is fixed on the side wall of the pressure seat, and a groove is opened at the bottom of the base, with slots for the insertion block to be inserted on both sides of the groove. Preferably, three positioning blocks arranged in a triangular pattern are fixed on the top surface of the fixing base. Preferably, the clamping assembly further includes a top seat; a column is fixed at each of the four bottom corners of the top seat, and the bottom ends of the four columns are respectively fixed to the four top corners of the base. A movable seat is fixed at the top of the upper clamping mold, and guide sleeves are fixed at each of the four corners of the movable seat. The guide sleeves slide with the columns, and the bottom of the guide sleeves is elastically connected to the top surface of the base through a first spring, and the first spring is sleeved on the columns. Preferably, the rotary adjustment mechanism includes a rotating shaft rotatably mounted on the base, the rotating shaft being connected to a drive unit; the top end of the rotating shaft is connected to the cover via a pressing part, and a sealing gasket is provided on the bottom edge of the cover. Preferably, the driving unit includes a gear; the bottom of the base is provided with a mounting groove, the bottom end of the rotating shaft extends into the mounting groove, and the bottom end of the rotating shaft is fixedly sleeved with the gear, the gear meshes with a rack, one end of the rack is fixed with a slider, the slider is slidably connected to a slide rail fixed in the mounting groove, the end of the rack is elastically connected to the side wall of the mounting groove through a second spring, and the end of the rack away from the slider is fixed with a first pressure rod for being pushed by the pressure seat, the first pressure rod extending into the mounting groove. Preferably, the pressing part includes a top plate fixed to the cover, a square post fixed to the bottom of the top plate, a square hole opened at the center of the shaft, the square post slidingly engaging with the square hole, a third spring fixed to the bottom of the top plate, a base plate fixed to the bottom end of the third spring, and the base plate fixedly sleeved on the shaft. Preferably, a lifting mechanism is provided at the bottom end of the square column; the lifting mechanism includes an extrusion bar; a ball bearing is installed at the bottom end of the square column, the extrusion bar is located below the ball bearing, the extrusion bar is fixed with a second pressure rod for being pushed by the pressure seat, a second guide hole is provided between the mounting groove and the recess, the second pressure rod is slidably engaged with the second guide hole, and the second pressure rod extends into the recess, the second pressure rod is fixed with a fixing block, and the fixing block is elastically connected to the groove wall of the mounting groove by a fourth spring. Preferably, the top surface of the end of the extrusion bar away from the second pressure rod is provided with an inclined surface, and the top surface of the other end of the extrusion bar is provided with a flat surface, and an arc-shaped surface is provided between the inclined surface and the flat surface, and the flat surface is flush with the top surface of the second pressure rod. Preferably, the length of the second pressure rod extending into the groove is greater than the length of the first pressure rod extending into the groove. Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention. The positive and progressive effects of this invention are as follows: The aforementioned stamping fixture utilizes a disassembly and assembly mechanism to quickly connect and separate the fixture components from the fixed base. Simply turning the handwheel allows for locking and unlocking of the fixture components. Combined with the positioning of the triangular locating blocks on the fixed base, rapid assembly and disassembly can be completed without additional tools, making operation convenient. Simultaneously, the upper clamping die of the fixture components is flexibly guided and installed via a movable seat, guide sleeve, and column. The upper clamping die does not need to be directly connected to the stamping cylinder of the stamping machine; simply fixing the base to the fixed base is sufficient for use, eliminating the need for docking the fixture with the stamping cylinder and further simplifying the assembly and disassembly process. It allows for quick replacement of fixture components of corresponding specifications according to different shapes of aluminum alloy precision forgings, improving the efficiency of stamping process changeovers. Through the linkage design of the rotary adjustment mechanism and the disassembly mechanism, the cap can be automatically flipped open and closed without manual operation, and without adding extra steps or workload for fixture disassembly and assembly. During the installation of the fixture assembly on the fixed base, the movement of the pressure seat of the disassembly mechanism can synchronously drive the rotary adjustment mechanism to automatically flip the cap away from the top of the mold cavity, ensuring that the mold cavity is open for the aluminum alloy billet to be put in and stamped. After the fixture assembly is disassembled, the rotary adjustment mechanism automatically resets under the action of spring force, and drives the cap to cover the top of the closed mold cavity, effectively preventing the mold cavity from opening after disassembly, preventing dust and foreign objects from entering the mold cavity, forming a protection for the mold cavity, ensuring the cleanliness of the inner wall of the mold cavity, and extending the service life of the fixture. Furthermore, in conjunction with the linkage design of the pressing part at the bottom of the cap and the lifting mechanism, before the cap is flipped open and closed, the second pressure rod can be pushed by the pressure seat to drive the extrusion strip to lift the cap, so that the sealing gasket separates from the top surface of the lower clamping mold in advance, forming a gap; throughout the entire process of the cap flipping open and resetting and closing, the sealing gasket does not contact the top surface of the lower clamping mold, avoiding the problem of wear caused by friction on the sealing gasket. At the same time, this design is linked with the disassembly and assembly mechanism, so the lifting and lowering of the cap is carried out automatically, without the need for additional operation by the operator, avoiding increasing the operation steps and workload of fixture disassembly and assembly. Attached Figure Description Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the top structure of the fixing base of the present invention; Figure 3 This is a schematic diagram of the structure of the bottom of the fixing base of the present invention; Figure 4 This is a schematic diagram of the cover and lower clamping mold in the installed state of the clamping assembly of the present invention; Figure 5 This is a schematic diagram of the fixture assembly of the present invention in a disassembled state; Figure 6 This is a schematic diagram of the structure of the bottom of the base of the present invention; Figure 7 This is a schematic diagram of the bottom of the base and the structure inside the mounting groove of the present invention; Figure 8 This is a schematic diagram of the sealing, rotating adjustment mechanism and lifting mechanism of the present invention; Figure 9 This is a schematic diagram of the structure inside the mounting slot of the present invention; Figure 10 This is a schematic diagram of the lifting mechanism of the present invention; Figure 11 This is a schematic diagram of the structure of the second pressure bar and the extrusion bar of the present invention. Explanation of reference numerals in the attached figures 1. Fixed base; 101. Positioning block; 102. Guide groove; 2. Clamp assembly; 201. Base; 2011. Groove; 2012. Slot; 2013. Mounting slot; 202. Column; 203. Top seat; 204. Lower clamping mold; 2041. Mold cavity; 205. Movable seat; 206. Guide sleeve; 207. First spring; 208. Upper clamping mold; 3. Cover; 301. Sealing gasket; 4. Disassembly and assembly mechanism; 401. Handwheel; 402. Pressure seat; 403. Insert block; 404. First frame; 405. Worm gear; 406. Worm wheel; 407. Central shaft; 408. Stud; 409. Frame 2; 410, Nut seat; 5, Sealing plate; 6, Rotary adjustment mechanism; 601, First pressure rod; 602, Rotating shaft; 603, Gear; 604, Rack; 605, Slide rail; 606, Slider; 607, Second spring; 608, Baffle; 7, Lifting mechanism; 701, Second pressure rod; 702, Square column; 7021, Embedded seat; 7022, Retaining ring; 703, Top plate; 704, Third spring; 705, Base plate; 706, Ball bearing; 707, Extrusion strip; 7071, Inclined surface; 7072, Flat surface; 7073, Arc-shaped surface; 708, Fixing block; 709, Fourth spring. Detailed Implementation The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein. like Figures 1-11As shown, the fixture for stamping includes a fixed base 1 and a fixture assembly 2; the fixed base 1 is provided with a disassembly and assembly mechanism 4, and the top surface of the fixed base 1 is connected to the fixture assembly 2 through the disassembly and assembly mechanism 4. The clamping assembly 2 includes a lower clamping mold 204 and a base 201 fixed to the bottom of the lower clamping mold 204. The lower clamping mold 204 is provided with a mold cavity 2041 with a top opening, and an upper clamping mold 208 is provided above the lower clamping mold 204. The stamping machine is used to drive the upper clamping mold 208 to move up and down, so that the upper clamping mold 208 is pressed into or out of the mold cavity 2041. It also includes a cover 3, which is connected to a rotary adjustment mechanism 6 and is mounted on the base 201; the rotary adjustment mechanism 6 is used to drive the cover 3 to rotate so that the cover 3 covers or moves away from the top of the closed mold cavity 2041. In practical implementation, the four corners of the bottom of the fixed base 1 are provided with support feet, and the bottom of the support feet is provided with mounting holes. By means of bolts or screws, the bottom of the support feet can be fixed to the stamping machine, so as to realize the fixed installation of the fixed base 1 on the stamping machine. The disassembly and assembly mechanism 4 facilitates the disassembly and assembly of the fixture assembly 2 on the fixed base 1, thereby making it easy to replace different fixture assemblies 2. Different fixture assemblies 2 have different upper clamping dies 208 and lower clamping dies 204 to meet the forging and forming of forgings of different shapes. By setting the rotary adjustment mechanism 6 and the cover 3, the top of the mold cavity 2041 can be automatically closed or opened. After the clamping assembly 2 is disassembled, the mold cavity 2041 is automatically closed to protect the inside of the mold cavity 2041 and prevent foreign objects and dust from entering during storage. After the clamping assembly 2 is installed, the top of the mold cavity 2041 is automatically opened to ensure the normal use of the clamping assembly 2. like Figures 2-3 as well as Figures 6-7As shown, the disassembly and assembly mechanism 4 includes a central shaft 407; each end of the central shaft 407 is fixed with a stud 408, and the threads of the two studs 408 are in opposite directions; the studs 408 are rotatably connected to a second frame 409 fixed to the bottom of the base 201, and each of the two studs 408 is threadedly connected with a nut seat 410, and a pressure seat 402 is fixed on the nut seat 410, and the bottom of the pressure seat 402 is slidably connected to a guide groove 102 opened on the base 201. The central shaft 407... A worm gear 406 is fixedly sleeved on the base 201, and the worm gear 406 meshes with a worm 405. The worm 405 is rotatably connected to a first frame 404 fixed to the bottom of the base 201. A handwheel 401 is fixed to one end of the worm 405, and the handwheel 401 is located on the outside of the fixed base 1. An insert 403 is fixed on the side wall of the pressure seat 402. A groove 2011 is provided at the bottom of the base 201, and slots 2012 for inserting the insert 403 are provided on both sides of the groove 2011. like Figures 1-2 As shown, three positioning blocks 101 arranged in a triangular pattern are fixed on the top surface of the fixed base 1. When the clamp assembly 2 is placed on the top surface of the fixed base 1 for installation, the side wall of the base 201 of the clamp assembly 2 is in contact with the three positioning blocks 101 to provide positioning for the clamp assembly 2. After the clamp assembly 2 is positioned, the pressure seat 402 is embedded in the groove 2011, and the insert 403 on the pressure seat 402 is aligned with the slot 2012. Subsequently, by rotating the handwheel 401 in the forward direction, the worm 405 is rotated. Through the meshing transmission of the worm 405 and the worm wheel 406, the central shaft 407 and the two studs 408 are rotated together. Then, through the thread transmission of the studs 408 and the nut seat 410, and the sliding between the bottom of the pressure seat 402 and the guide groove 102, the guide is provided. At the same time, the threads of the two studs 408 are turned in opposite directions, so that the two pressure seats 402 are far apart from each other. The two pressure seats 402 are pressed against the two side walls of the groove 2011, and the insert 403 is inserted into the slot 2012, thus realizing the installation of the clamp assembly 2. When disassembling the clamp assembly 2, turn the handwheel 401 in the opposite direction to rotate the worm gear 405. Through the meshing transmission between the worm gear 405 and the worm wheel 406, the central shaft 407 and the two studs 408 rotate together. Through the threaded transmission between the studs 408 and the nut seat 410, the guide groove 102 provides guidance, causing the two pressure seats 402 to move closer to each other. The pressure seats 402 separate from the side wall of the groove 2011, and the insert block 403 separates from the slot 2012. Then, lift the entire clamp assembly 2 to remove it from the top surface of the fixed base 1, thus completing the disassembly. With the above design, the disassembly and assembly mechanism 4 can limit or unlock the clamp assembly 2 simply by turning the handwheel 401, making the installation and disassembly of the clamp assembly 2 convenient and easy to operate. like Figure 1 , Figure 5 as well as Figure 6 As shown, the clamping assembly 2 also includes a top seat 203; a column 202 is fixed at each of the four bottom corners of the top seat 203, and the bottom ends of the four columns 202 are respectively fixed at the four top corners of the base 201. A movable seat 205 is fixed at the top of the upper clamping mold 208, and a guide sleeve 206 is fixed at each of the four corners of the movable seat 205. The guide sleeve 206 slides with the column 202, and the bottom of the guide sleeve 206 is elastically connected to the top surface of the base 201 through a first spring 207, and the first spring 207 is sleeved on the column 202. The two ends of the first spring 207 are fixed to the bottom surface of the guide sleeve 206 and the top surface of the base 201, respectively, so as to realize that the guide sleeve 206 and the movable seat 205 are elastically installed on the base 201. The top seat 203 has a through groove in the middle, and the through groove is located above the movable seat 205. After the fixture assembly 2 is installed on the fixed base 1, the through slot on the top seat 203 is aligned with the output shaft of the stamping cylinder of the stamping machine. When forging and stamping aluminum alloy precision forgings, the heated aluminum alloy billet is placed in the cavity 2041 of the lower clamping die 204. The stamping cylinder extends, and its output shaft passes through the through slot and pushes the movable seat 205 downward, causing the movable seat 205 and the upper clamping die 208 to move downward together. At the same time, the first spring 207 is compressed, and the upper clamping die 208 is pressed into the cavity 2041 of the lower clamping die 204 to clamp and press the aluminum alloy billet, so that the aluminum alloy billet is stamped and formed to obtain the forging of the required shape. After stamping, the stamping cylinder of the stamping machine retracts, its output shaft leaves the through slot, and the top surface of the movable seat 205 loses the pressure of the stamping machine. The elastic force of the first spring 207 causes the movable seat 205 and the upper clamping die 208 to move upward to reset. The upper clamping die 208 leaves the lower clamping die 204, and finally the forging is taken out, completing the processing. The clamping assembly 2 provided above is applied to a stamping machine. It only requires the base 201 to be installed with the fixed seat 1, without the need to connect it to the stamping cylinder of the stamping machine, making the clamping assembly 2 easy to install and remove, and further facilitating the replacement of the clamping assembly 2. The vertical movement of the movable seat 205 and the upper clamping mold 208 is guided by the sliding between the guide sleeve 206 and the column 202. like Figures 7-9 As shown, the rotary adjustment mechanism 6 includes a rotating shaft 602 rotatably mounted on the base 201, and the rotating shaft 602 is connected to a driving part; the top end of the rotating shaft 602 is connected to the cover 3 through a pressing part, and a sealing gasket 301 is provided on the bottom edge of the cover 3. The driving unit includes a gear 603; the bottom of the base 201 has a mounting groove 2013, the bottom end of the rotating shaft 602 extends into the mounting groove 2013, and the bottom end of the rotating shaft 602 is fixedly sleeved with the gear 603. The gear 603 meshes with a rack 604, and a slider 606 is fixed to one end of the rack 604. The slider 606 is slidably connected to a slide rail 605 fixed in the mounting groove 2013. The end of the rack 604 is connected to the mounting groove 2013 by a second spring 607. The sidewall of 13 is elastically connected (the two ends of the second spring 607 are respectively fixed to the end face of the rack 604 and the sidewall of the mounting groove 2013 to realize the elastic installation of the rack 604). The end of the rack 604 away from the slider 606 is fixed with a first pressure rod 601 for the pressure seat 402 to push. A first guide hole is provided between the mounting groove 2013 and the groove 2011. The first pressure rod 601 slides with the first guide hole and extends into the mounting groove 2013. A baffle 608 is fixed on the first pressure rod 601; when the clamp assembly 2 is disassembled, the baffle 608 is attached to the side wall of the mounting groove 2013. like Figures 5-6 As shown, when the clamping assembly 2 is not installed on the fixed base 1, the cover 3 covers the top of the mold cavity 2041, and the sealing gasket 301 of the cover 3 is pressed against the top surface of the lower clamping mold 204 by the pressing part, providing better sealing protection for the top opening of the mold cavity 2041; and the first pressure rod 601 extends into the groove 2011. When installing the clamp assembly 2, the clamp assembly 2 is placed on the top surface of the fixed base 1, and the pressure base 402 is embedded in the groove 2011, such as... Figure 7 As shown, the subsequent driving pressure seat 402 moves closer to the side wall of the groove 2011 until it is pressed tightly against the side wall of the groove 2011. During this process, the pressure seat 402 moves closer to the end of the first pressure rod 601 away from the rack 604. After the pressure seat 402 is in contact with the end face of the first pressure rod 601, the pressure seat 402 continues to move, pushing the first pressure rod 601, causing the first pressure rod 601 to move into the mounting groove 2013 through the first guide hole. Rod 601 drives rack 604 and slider 606 to move together. The slider 606 provides guidance through sliding with slide rail 605, while simultaneously compressing the second spring 607. Rack 604 moves, meshing with gear 603, causing gear 603 and shaft 602 to rotate together. Shaft 602 drives cover 3 to flip, specifically flipping it 90 degrees, thus opening the top of mold cavity 2041. Figure 4 As shown. When disassembling the clamp assembly 2, bring the two pressure seats 402 closer together and move them toward the center of the groove 2011 to release the pressure on the first pressure rod 601. The elastic force of the second spring 607 causes the rack 604, the first pressure rod 601, and the slider 606 to reset together. The first pressure rod 601 extends into the groove 2011. Through the meshing transmission of the rack 604 and the gear 603, the rotating shaft 602 drives the cover 3 to flip and reset, so that the cover 3 covers the lower clamping mold 204 to close the mold cavity 2041. Through the above design, the cap 3 can be automatically flipped open and automatically flipped closed without manual operation. The flipping and opening is achieved by the pushing force of the pressure seat 402, which ensures the sealing and protection effect of the mold cavity 2041 in the disassembled state and eliminates the need to close the top opening of the mold cavity 2041 in the installed state. At the same time, it does not increase the workload and operation steps of disassembly and assembly, only the handwheel 401 needs to be turned. like Figure 8 As shown, the pressing part includes a top plate 703 fixed to the cover 3. A square post 702 is fixed to the bottom of the top plate 703. A square hole is opened at the axis of the rotating shaft 602. The square post 702 is slidably engaged with the square hole. A third spring 704 is fixed to the bottom of the top plate 703. A base plate 705 is fixed to the bottom end of the third spring 704, and the base plate 705 is fixedly sleeved on the rotating shaft 602. The third spring 704 is always in a stretched state, providing downward pulling force to the top platen 703, so that the sealing gasket 301 at the bottom of the top platen 703 presses against the top surface of the lower clamping mold 204, ensuring the sealing effect. like Figures 9-10 As shown, a lifting mechanism 7 is provided at the bottom end of the square column 702; the lifting mechanism 7 includes an extrusion strip 707; a ball bearing 706 is installed at the bottom end of the square column 702, the extrusion strip 707 is located below the ball bearing 706, and a second pressure rod 701 for the pressure seat 402 to push is fixed to the extrusion strip 707; a second guide hole is provided between the mounting groove 2013 and the recess 2011; the second pressure rod 701 is slidably engaged with the second guide hole, and the second pressure rod 701 extends into the recess 2011; a fixing block 708 is fixed to the second pressure rod 701; the fixing block 708 is elastically connected to the wall of the mounting groove 2013 through a fourth spring 709 (the two ends of the fourth spring 709 are respectively fixed to the fixing block 708 and the wall of the mounting groove 2013, realizing the elastic connection between the fixing block 708 and the wall of the mounting groove 2013). A base 7021 is fixed to the bottom end of the square column 702. A recessed hole is formed at the bottom of the base 7021, and the ball bearing 706 is fitted into the recessed hole with a clearance fit. A retaining ring 7022 is fixed to the bottom of the base 7021, and the ball bearing 706 passes through the retaining ring 7022. The diameter of the retaining ring 7022 is smaller than the diameter of the ball bearing 706. Through this arrangement, the ball bearing 706 is rolled and mounted on the bottom of the square column 702. like Figure 11 As shown, the top surface of the extrusion bar 707 away from the second pressure rod 701 has an inclined surface 7071, and the top surface of the other end of the extrusion bar 707 has a flat surface 7072. An arc-shaped surface 7073 is provided between the inclined surface 7071 and the flat surface 7072. The arc-shaped surface 7073 facilitates the rolling of the ball 706 from the inclined surface 7071 to the flat surface 7072, providing a smooth transition. The flat surface 7072 is flush with the top surface of the second pressure rod 701. The extrusion bar 707 compresses and pushes the ball 706 through the inclined surface 7071, the arc-shaped surface 7073, and the flat surface 7072, causing the square column 702 to rise downwards. like Figure 7 As shown, the length of the second pressure rod 701 extending into the groove 2011 is greater than the length of the first pressure rod 601 extending into the groove 2011. With this design, when the clamp assembly 2 is installed, the pressure seat 402 first pushes the second pressure rod 701, and after the lifting mechanism 7 lifts the square column 702 and the cover 3, the pressure seat 402 then pushes the first pressure rod 601. If the clamp assembly 2 is not installed, such as Figures 6-10 As shown, the first pressure rod 601 and the second pressure rod 701 extend into the groove 2011, while there is a gap between the extrusion strip 707 and the bottom surface of the ball 706 (specifically, the inclined surface 7071 of the extrusion strip 707 is located at the bottom of the ball 706, as shown). Figure 10 As shown), the two are not in contact. The elastic force of the third spring 704 in the lower pressing part causes the cover 3 to press against the top surface of the lower clamping mold 204, ensuring the sealing effect. When the clamp assembly 2 is installed, the pressure seat 402 first pushes the second pressure rod 701, causing the second pressure rod 701 to move into the mounting groove 2013. The second pressure rod 701 drives the extrusion strip 707 to move and stretches the fourth spring 709. After the inclined surface 7071 of the extrusion strip 707 comes into contact with the ball 706, the extrusion strip 707 pushes the ball 706 through the inclined surface 7071. The ball 706 slides with the inclined surface 7071, causing the ball 706, the square post 702, and the cover 3 to be raised, and increasing the tension of the third spring 704. After the ball 706 moves through the arc surface 7073 to the plane 7072, the ball 706, the square post 702, and the cover 3 are raised to their highest position. The sealing gasket 301 on the cover 3 separates from the top surface of the upper clamping mold 208, creating a gap. After the pressure seat 402 contacts the end of the first pressure rod 601, the lifting mechanism 7 completes the above action. Subsequently, the pressure seat 402 pushes the first pressure rod 601, so that the cover 3 flips open. During this process, the sealing gasket 301 does not rub against the top surface of the lower clamping mold 204 to avoid wear. At the same time, the second pressure rod 701 continues to be pushed. During this process, the top surface of the second pressure rod 701 rolls with the ball 706. The top surface of the second pressure rod 701 is flush with the plane 7072 of the extrusion strip 707, so it will not continue to lift the cover 3, thus maintaining the height after lifting during the flipping and opening process of the cover 3. When the clamp assembly 2 is disassembled, as the pressure seat 402 gradually separates from the first pressure rod 601, the cover 3 resets and moves to the top of the mold cavity 2041. Simultaneously, the second pressure rod 701, under the elastic force of the fourth spring 709, moves into the groove 2011. The second pressure rod 701 continuously abuts against the pressure seat 402. During this process, the second pressure rod 701 drives the extrusion strip 707 to move together. The top surface of the second pressure rod 701 slides against the ball bearing 706, keeping the cover 3 in a raised state. During the reset and closing process of the cover 3, the sealing gasket 301 and the lower... There is still a gap between the clamping molds 204 to prevent friction and wear of the sealing gasket 301. After the cover 3 is reset, the pressure seat 402 separates from the second pressure rod 701. The second pressure rod 701 and the extrusion strip 707 continue to move under the elastic force of the fourth spring 709. The ball 706 slides over the plane 7072, the arc surface 7073 and the inclined surface 7071 in sequence until it separates from the inclined surface 7071. The ball 706, the square column 702 and the cover 3 move downward by the elastic force of the third spring 704. The cover 3 presses the lower clamping mold 204 by the elastic force of the third spring 704 to provide a seal. With the above design, the sealing gasket 301 will not rub when the cover 3 is flipped open and closed, so as to avoid wear. Moreover, the friction-avoiding operation does not require manual operation and does not increase the workload of disassembling and assembling the clamp assembly 2. like Figure 6As shown, a sealing plate 5 is installed at the bottom of the mounting slot 2013. The sealing plate 5 is used to control the opening and closing of the bottom of the mounting slot 2013 for easy maintenance. This invention is not limited to the embodiments described above. Any changes made to their shape or structure fall within the protection scope of this invention. The protection scope of this invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but all such changes and modifications fall within the protection scope of this invention.

Claims

1. A fixture for stamping, comprising a fixed base (1) and a fixture assembly (2); characterized in that: The fixed base (1) is provided with a disassembly and assembly mechanism (4), and the top surface of the fixed base (1) is connected to the clamp assembly (2) through the disassembly and assembly mechanism (4); The clamping assembly (2) includes a lower clamping mold (204) and a base (201) fixed to the bottom of the lower clamping mold (204). The lower clamping mold (204) is provided with a mold cavity (2041) with a top opening. An upper clamping mold (208) is provided above the lower clamping mold (204). The press is used to drive the upper clamping mold (208) to move up and down, so that the upper clamping mold (208) is pressed into or out of the mold cavity (2041). It also includes a cover (3), which is connected to a rotary adjustment mechanism (6), and the rotary adjustment mechanism (6) is mounted on a base (201); the rotary adjustment mechanism (6) is used to drive the cover (3) to rotate so that the cover (3) covers the top of the closed mold cavity (2041) or leaves the top of the mold cavity (2041).

2. The stamping fixture as described in claim 1, characterized in that: The disassembly and assembly mechanism (4) includes a central shaft (407); both ends of the central shaft (407) are fixed with a stud (408), and the threads of the two studs (408) are opposite in direction; the studs (408) are rotatably connected to a second frame (409) fixed to the bottom of the base (201), and both studs (408) are threaded with a nut seat (410), and a pressure seat (402) is fixed on the nut seat (410), and the bottom of the pressure seat (402) is slidably connected to a guide groove (102) opened on the base (201). A worm gear (406) is fixedly sleeved in the middle of the shaft (407), and the worm gear (406) meshes with a worm (405). The worm (405) is rotatably connected to the first frame (404) fixed at the bottom of the base (201). A handwheel (401) is fixed at one end of the worm (405). An insert (403) is fixed on the side wall of the pressure seat (402). A groove (2011) is provided at the bottom of the base (201). Slots (2012) for inserting the insert (403) are provided on both sides of the groove (2011).

3. The jig for stamping as described in claim 1, characterized in that: Three positioning blocks (101) arranged in a triangular pattern are fixed on the top surface of the fixed base (1).

4. The jig for stamping as described in claim 1, characterized in that: The clamping assembly (2) also includes a top seat (203); a column (202) is fixed at each of the four bottom corners of the top seat (203), and the bottom ends of the four columns (202) are respectively fixed at the four top corners of the base (201). A movable seat (205) is fixed at the top of the upper clamping mold (208), and a guide sleeve (206) is fixed at each of the four corners of the movable seat (205). The guide sleeve (206) slides with the column (202), and the bottom of the guide sleeve (206) is elastically connected to the top surface of the base (201) through a first spring (207), and the first spring (207) is sleeved on the column (202).

5. The jig for stamping as described in claim 2, characterized in that: The rotary adjustment mechanism (6) includes a rotating shaft (602) rotatably mounted on a base (201), the rotating shaft (602) being connected to a drive unit; the top end of the rotating shaft (602) is connected to the cover (3) via a pressing part, and a sealing gasket (301) is provided on the bottom edge of the cover (3).

6. The jig for stamping as described in claim 5, characterized in that: The drive unit includes a gear (603); the bottom of the base (201) is provided with a mounting groove (2013), the bottom end of the rotating shaft (602) extends into the mounting groove (2013), and the bottom end of the rotating shaft (602) is fixedly sleeved with the gear (603). The gear (603) meshes with a rack (604), and a slider (606) is fixed at one end of the rack (604). The slider (606) is slidably connected to a slide rail (605) fixed in the mounting groove (2013). The end of the rack (604) is elastically connected to the side wall of the mounting groove (2013) through a second spring (607). A first pressure rod (601) for the pressure seat (402) to push is fixed at the end of the rack (604) away from the slider (606). The first pressure rod (601) extends into the mounting groove (2013).

7. The stamping fixture as described in claim 6, characterized in that: The pressing part includes a top plate (703) fixed on the cover (3), a square column (702) fixed at the bottom of the top plate (703), a square hole is provided at the center of the shaft (602), the square column (702) slides with the square hole, a third spring (704) is fixed at the bottom of the top plate (703), a base plate (705) is fixed at the bottom end of the third spring (704), and the base plate (705) is fixedly sleeved on the shaft (602).

8. The jig for stamping as described in claim 7, characterized in that: The bottom end of the square column (702) is provided with a lifting mechanism (7); the lifting mechanism (7) includes an extrusion bar (707); a ball bearing (706) is installed at the bottom end of the square column (702), the extrusion bar (707) is located below the ball bearing (706), the extrusion bar (707) is fixed with a second pressure rod (701) for being pushed by the pressure seat (402), a second guide hole is provided between the mounting groove (2013) and the groove (2011), the second pressure rod (701) is slidably engaged with the second guide hole, and the second pressure rod (701) extends into the groove (2011), the second pressure rod (701) is fixed with a fixing block (708), the fixing block (708) is elastically connected to the groove wall of the mounting groove (2013) through a fourth spring (709).

9. The jig for stamping as described in claim 8, characterized in that: The top surface of the extrusion bar (707) away from the second pressure rod (701) is provided with an inclined surface (7071), and the top surface of the other end of the extrusion bar (707) is provided with a flat surface (7072). An arc-shaped surface (7073) is provided between the inclined surface (7071) and the flat surface (7072). The flat surface (7072) is flush with the top surface of the second pressure rod (701).

10. The jig for stamping as described in claim 8, characterized in that: The length of the second pressure rod (701) extending into the groove (2011) is greater than the length of the first pressure rod (601) extending into the groove (2011).

Images