A lower die device of a mirror frame bending forming machine

Abstract

The present invention discloses: a lower die device of a frame bending and forming machine, and the key points of its technical solution are: a lower die device of a frame bending and forming machine, comprising a bottom plate arranged on the frame bending and forming machine, a conveying mechanism arranged on the bottom plate and used for conveying the frame, and a lower die mechanism for fixing and installing the conveyed frame; the lower die mechanism comprises a lower die seat rotatably connected to the bottom plate, a lower module arranged on the lower die seat and provided for the frame installation, a rotating component for driving the lower die seat to rotate, a clamping and fixing component for clamping and fixing the frame, and an installation and adjustment component for installing and adjusting the relative angles of the two lower modules; the lower die seat rotation axis is arranged horizontally. The present invention can realize the automatic installation of the heated frame to the lower module, and realize the precise positioning of the frame installation position, improve the efficiency of frame bending and forming, and realize the automatic bending and forming of the frame.

Description

Technical Field

[0001] The invention relates to the field of mirror frame processing, and in particular to a lower die device of a mirror frame bending and forming machine. Background Art

[0002] Existing glasses mainly include a frame, temples, and lenses; and the frame generally includes two lens frames, a nose bridge arranged between the two lens frames, and a frame beam connecting the two lens frames.

[0003] After the frame is injection molded, it is generally flat or has a certain curvature. In order to make the frame of glasses adapt to the human face contour, the frame needs to be bent and adjusted, so that the frame beam is bent at a certain angle to adapt to the facial contour and ensure that the two lens frames are adapted to the human eyes.

[0004] The existing frame bending molding is generally performed by preheating the frame and then placing it into a mold for secondary molding. However, there is no corresponding frame bending molding molding equipment at this stage.

[0005] Therefore, it is necessary for us to improve such a structure to overcome the above-mentioned defects. Summary of the invention

[0006] The purpose of the present invention is to provide a lower mold device of a spectacles frame bending and forming machine, which can automatically install the heated spectacles frame to the lower module, accurately locate the installation position of the spectacles frame, improve the efficiency of spectacles frame bending and forming, and realize automatic bending and forming of spectacles frame.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions: a lower mold device of a frame bending and forming machine, comprising a base plate arranged on the frame bending and forming machine, a conveying mechanism arranged on the base plate and used to convey the frames, and a lower mold mechanism for installing and fixing the conveyed frames; the lower mold mechanism comprises a lower mold base rotatably connected to the base plate, a lower module arranged on the lower mold base and for installing the frames, a rotating component for driving the lower mold base to rotate, a clamping and fixing component for clamping and fixing the frames, and an installation and adjustment component for installing and adjusting the relative angles of the two lower modules; the rotation axis of the lower mold base is arranged horizontally.

[0008] The present invention is further configured as follows: the conveying mechanism includes a receiving base arranged on the bottom plate, a sliding assembly arranged on the base and sliding toward the lower mold base, a material receiving fork arranged on the sliding assembly and abutting against the lower end surface of the frame, a material receiving rack arranged on the sliding assembly and for abutting against the side wall of the frame on the side away from the lower mold base, and a positioning assembly arranged on the bottom plate for positioning the frame; the sliding assembly includes a first receiving slider that slides horizontally relative to the receiving base, a first sliding cylinder for driving the first receiving slider to slide toward the lower mold base, a second receiving slider that slides horizontally relative to the first receiving slider, and a third receiving slider that slides horizontally relative to the second receiving slider. A second sliding cylinder for driving the second receiving slider to slide, and a third sliding cylinder for driving the third receiving slider to slide, the sliding directions of the second receiving slider and the third receiving slider are consistent with the sliding direction of the first receiving slider, the material receiving fork is fixedly connected to the third receiving slider, the material receiving frame is hinged to the second receiving slider, and the hinged ends of the material receiving frame and the second receiving slider are provided with a rotation torsion spring, the material receiving frame is inclined from bottom to top away from the lower die base, the first receiving slider is provided with a connecting rod abutting the material receiving frame, after the second receiving slider slides toward the lower die base relative to the first receiving slider, the material receiving frame rotates toward the lower die base with the end of the connecting rod as a fulcrum.

[0009] The present invention is further configured as follows: the positioning assembly includes a two-way cylinder fixedly connected to the base plate, two positioning blocks symmetrically arranged at the output ends of the corresponding two-way cylinders, and a positioning plate arranged on the positioning block and in an L-shape, the two positioning plates are arranged opposite to each other, and the mirror frame is located between the two positioning plates; the positioning plate is horizontally slidably connected to the positioning block, and the sliding direction of the positioning plate is parallel to the sliding direction of the first receiving slider, and a reset torsion spring is arranged between the positioning plate and the positioning block to push the positioning plate to reset.

[0010] The present invention is further configured as follows: the rotating component includes a rotating shaft arranged on the side wall of the lower mold base, a rotating cylinder arranged on the bottom plate and driving the rotating shaft, a gear arranged on the rotating shaft, a rack slidably connected to the bottom plate and meshing with the gear, and a driving cylinder arranged on the bottom plate and driving the rack to slide.

[0011] The present invention is further configured as follows: a fixing component is provided between the base plate and the lower die base to prevent the lower die base from flipping over after being pressurized, the fixing component includes a fixing protrusion provided on the lower die base and protruding from the side wall of the lower die base, a fixing connecting rod rotatably connected to the base plate at one end, a fixing protrusion provided on the fixing connecting rod and abutting against the upper end surface of the fixing protrusion, and a fixing cylinder provided on the base plate and driving the fixing connecting rod to rotate toward the lower die base.

[0012] The present invention is further configured as follows: the base plate is provided with a support rotatably connected to one end of the lower die base away from the rotating shaft, the support side wall is provided with an L-shaped control block for controlling the rotation angle of the lower die base, the upper surface of the lower die base can abut against the lower surface of the L-shaped control block, and after the lower die base is flipped 180 degrees, the lower die base can abut against the upper surface of the L-shaped control block, and the lower die base is provided with two hydraulic buffers that can respectively abut against the upper surface and lower surface of the L-shaped control block.

[0013] The present invention is further configured as follows: the clamping and fixing component includes a clamping cylinder arranged on the lower mold base and facing vertically upward, a clamping connecting block arranged on the output shaft of the clamping cylinder, and a V-shaped clamping spring sheet arranged on the clamping connecting block, and the facing side walls of the two lower modules are provided with control grooves for the clamping spring sheet to pass through, and the clamping spring sheet is fixedly connected to two clamping protrusions that respectively abut against the inner wall of the lens frame.

[0014] The present invention is further configured as follows: the installation and adjustment component includes a main bracket arranged on the upper end surface of the lower mold base, two sub-brackets arranged on both sides of the main bracket, an installation component arranged between the lower mold base and the sub-bracket and driving the sub-bracket to move and then fix the lower module, and an angle adjustment component arranged between the lower mold base and the main bracket for adjusting the bending angles of the two lower modules.

[0015] The present invention is further configured as follows: the sub-bracket is slidably connected to the lower die base in the direction of the main bracket, and the lower die base is provided with a spring for pushing the sub-bracket to move toward the main bracket, the angle adjustment assembly includes an adjustment column which is penetrated through the lower die base and slidably connected to the lower die base, a through hole which is opened in the lower die base and for the adjustment column to penetrate, and a locking bolt which is threadedly connected to the lower die base and can be penetrated into the through hole, and the main bracket is connected to the adjustment column and moves synchronously with the adjustment column.

[0016] The present invention is further configured as follows: the base plate can slide horizontally relative to the frame bending machine, a U-shaped rotation axis groove is opened at the corner position of one end of the base plate, and the base plate is provided with a limiting cylinder for limiting the rotation and sliding of the base plate relative to the frame bending machine, and the output shaft of the limiting cylinder is arranged vertically downward and can protrude from the lower end surface of the base plate.

[0017] In summary, the present invention has the following beneficial effects:

[0018] The heated mirror frame falls down and abuts against the receiving fork. After the mirror frame falls into the space surrounded by the positioning plate, the receiving rack and the receiving fork, the two positioning plates are driven by the two-way cylinder to move toward each other to realize the positioning of the center of the mirror frame and ensure that the position of the mirror frame is consistent with the corresponding lower module; then the first receiving slide block, the second receiving slide block and the third receiving slide block are driven by the first sliding cylinder to move synchronously toward the lower die seat to make the mirror frame close to the lower module position. At this time, the lower die seat rotates 90° and makes the lower module face the receiving rack, and then the second receiving slide block and the third receiving slide block are driven by the second sliding cylinder. The block continues to move toward the lower die base, and the receiving rack flips toward the lower module and installs the frame on the lower module; the clamping connecting block and the clamping spring are driven by the clamping cylinder to move toward the lower die base, and the clamping spring drives the clamping protrusion to clamp into the lens groove to clamp and fix the frame; then the driving cylinder drives the lower die base to reverse 90° so that the lower die base and the lower module face upward, and the upper die and lower die mechanism are combined to squeeze and bend the frame to be bent to a certain angle, and then the rotating cylinder drives the lower die base to rotate 180°, and the formed frame falls off when the lower module faces downward.

[0019] During operation, the mirror frame falls down and abuts against the material receiving fork, and the relative position of the mirror frame is limited by the material receiving rack and the positioning assembly, and then the first sliding cylinder drives the first receiving slider, the second receiving slider, and the third receiving slider to move synchronously toward the lower die seat, so that the mirror frame is close to the lower module position, and then the second sliding cylinder drives the second receiving slider and the third receiving slider to continue to move toward the lower die seat, and the second receiving slider drives the material receiving rack to operate and make the mirror frame abut against the lower module, so as to place the mirror frame on the lower module. After completing the above steps, the first sliding cylinder and the second sliding cylinder are reset, and the first sliding cylinder and the second sliding cylinder are reset. The three sliding cylinders drive the third receiving slider to move relative to the second receiving slider away from the lower die seat, so that the material receiving fork is separated from the material receiving rack, that is, the lower end surface of the frame does not contact the material receiving fork when the frame falls, resulting in the frame being unable to be received by the conveying mechanism; when the frame is bent and formed by the lower die mechanism, the third sliding cylinder is reset to make the material receiving fork protrude from the material receiving rack toward one end of the lower die seat, and the lower end surface of the frame can abut against the material receiving fork to achieve normal reception of the frame; the third sliding cylinder is used to control the sliding of the material receiving fork to avoid receiving multiple frames at one time, thereby ensuring that the conveying mechanism only conveys one frame to the lower module position at a time.

[0020] When the mirror frame is driven to move toward the lower die base by the first sliding cylinder, the mirror frame is close to the lower module. After the second receiving slider is driven to move toward the lower die base by the second sliding cylinder, the second receiving slider drives the material receiving rack to move toward the lower die base, so that the material receiving rack is flipped toward the lower die base with its abutting end with the connecting rod as a fulcrum, so that the mirror frame is installed in the lower module position, thereby realizing automatic, efficient and accurate installation of the mirror frame on the lower module.

[0021] After the mirror frame falls into the space enclosed by the positioning plate, the receiving rack and the receiving fork, the two positioning plates are driven by the bidirectional cylinder to move toward each other to realize the positioning of the center of the mirror frame and ensure that the position of the mirror frame is consistent with the corresponding lower module. Then, when the receiving rack pushes the mirror frame into the lower module, the mirror frame moves the positioning plate toward the lower die seat for a certain distance. Due to the elastic deformation of the positioning plate, the mirror frame is separated from the positioning plate and then installed into the lower module, and the positioning plate is reset by the reset torsion spring. The positioning plate plays a buffering role by sliding relative to the positioning block to avoid rigid collision between the positioning plate and the mirror frame. At the same time, the elasticity of the positioning plate facilitates the frame to separate from the positioning plate.

[0022] When the positioning block slides, the limit column is relative to the limit long hole, and limits the sliding length of the limit slider through the limit long hole, thereby controlling the sliding and telescopic distance of the two positioning blocks, and the relative position of the limit column is conveniently adjusted through the limit bolt and the limit slider threaded connection, which facilitates the adjustment.

[0023] The L-shaped control block can effectively position the lower die base to rotate 180° and ensure that the lower die base is in a vertical upward or downward position. At the same time, the hydraulic buffer can play a buffering and noise reduction function.

[0024] When installing the lower module, pull the sub-bracket and move it away from the main bracket, so that the lower module can be placed between the sub-bracket and the main bracket, and the pin shaft of the lower module is respectively inserted into the corresponding main slot and sub-slot, and then the sub-bracket is driven to move toward the main bracket through spring reset to ensure that the pin shaft is inserted into the corresponding main slot and sub-slot, so as to fix the lower module and realize quick and convenient installation of the lower module.

[0025] When in use, the locking bolt is loosened to adjust the position of the adjusting column relative to the telescopic hole, thereby adjusting the height of the main bracket relative to the lower die base, and the position of the adjusting base is determined by the position of the scale protruding from the lower die base, and then the locking bolt is tightened to adjust the relative rotation angle of the two lower modules.

[0026] When in use, first install the frame on the two lower modules. At this time, the two ends of the V-shaped clamping spring are respectively inserted into the corresponding lens frames, and then the clamping connecting block and the clamping spring are driven by the clamping cylinder to move toward the lower mold base. After the V-shaped side wall of the clamping spring touches the bottom surface of the control groove, the two V-shaped side walls of the clamping spring move closer to each other, so that the clamping protrusions move towards each other and touch the inner wall of the lens frame, thereby achieving the effect of clamping and fixing the frame, and the clamping protrusions can be inserted into the lens groove to further ensure that the frame is fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the structure of the conveying mechanism in the present invention. Figure 1 ;

[0029] Figure 3 It is a schematic diagram of the structure of the conveying mechanism in the present invention. Figure 2 ;

[0030] Figure 4 It is a schematic diagram of the structure of the conveying mechanism in the present invention. Figure 3 ;

[0031] Figure 5 It is an exploded schematic diagram of the conveying mechanism in the present invention;

[0032] Figure 6 is a cross-sectional view of the positioning assembly in the present invention;

[0033] Figure 7 It is a cross-sectional view of the lower die mechanism in the present invention. Figure 1 ;

[0034] Figure 8 It is a cross-sectional view of the lower die mechanism in the present invention. Figure 2 ;

[0035] Fig. 9 It is a schematic diagram of the explosion of the lower die mechanism in the present invention. Figure 1 ;

[0036] Fig.10 It is a schematic diagram of the explosion of the lower die mechanism in the present invention. Figure 2 ;

[0037] Fig.11 It is a schematic diagram of the explosion of the lower die mechanism in the present invention. Figure 3 ;

[0038] Fig.12 is a cross-sectional view of the frame clamping and fixing component of the present invention;

[0039] Fig.13 It is a structural diagram of the mirror frame.

[0040] The corresponding parts indicated by the numbers in the figure are: 1. bottom plate; 2. lower die seat; 3. lower die block; 401. receiving base; 402. receiving fork; 403. receiving rack; 404. buffer spring; 411. first receiving slider; 412. first sliding cylinder; 413. second receiving slider; 414. third receiving slider; 415. second sliding cylinder; 416. third sliding cylinder; 421. rotating torsion spring; 422. connecting rod; 431. two-way cylinder; 432. positioning block; 433. positioning plate; 434. reset torsion spring; 435. elastic deformation groove; 441. limiting long hole; 442. limiting seat; 443. limiting slider; 444. limiting column; 445. limiting bolt; 446. pad; 501. rotating shaft; 502. rotating cylinder; 503. gear; 504. rack; 505, driving cylinder; 511, support; 512, L-shaped control block; 513, hydraulic buffer; 521, fixed convex block; 522, fixed connecting rod; 523, fixed protrusion; 524, fixed cylinder; 601, main bracket; 602, sub-bracket; 611, pin shaft; 612, sub-slot; 613, main slot; 614, spring; 615, positioning pin; 621, adjustment column; 62 2. Drilling hole; 623. Locking bolt; 624. Scale; 631. Pre-adjusting seat; 632. Pre-adjusting block; 633. Lifting column; 701. Clamping cylinder; 702. Clamping connecting block; 703. Clamping spring; 704. Control groove; 705. Clamping protrusion; 706. Forming mold; 711. Positioning plate; 712. Adjusting block; 801. Rotation axis groove; 802. Limiting cylinder. DETAILED DESCRIPTION

[0041] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with illustrations and specific embodiments.

[0042] like Figure 1 As shown, the present invention proposes a lower die device for a frame bending machine, comprising a bottom plate 1 installed on the frame bending machine, a conveying mechanism arranged on the bottom plate 1 and used to convey the frame, and a lower die mechanism for installing and fixing the conveyed frame. The lower die mechanism comprises a lower die base 2 rotatably connected to the bottom plate 1, a lower module 3 installed on the lower die base 2 and for installing the frame, a rotating component for driving the lower die base 2 to rotate, a clamping and fixing component for clamping and fixing the frame, and an installation and adjustment component for installing and adjusting the relative angles of the two lower modules 3.

[0043] The conveying mechanism includes a receiving base 401 fixedly connected to the base plate 1, a sliding assembly arranged on the base and sliding toward the lower mold base 2, a material receiving fork 402 installed on the sliding assembly and abutting against the lower end surface of the frame, a material receiving rack 403 installed on the sliding assembly and abutting against the side wall of the frame facing away from the lower mold base 2, and a positioning assembly arranged on the base plate 1 and positioning the frame. The sliding assembly includes a first receiving slider 411 that slides horizontally relative to the receiving base 401, a first sliding cylinder 412 for driving the first receiving slider 411 to slide toward the lower mold base 2, a second receiving slider 413 that slides horizontally relative to the first receiving slider 411, a third receiving slider 414 that slides horizontally relative to the second receiving slider 413, a second sliding cylinder 415 for driving the second receiving slider 413 to slide, and a third sliding cylinder 416 for driving the third receiving slider 414 to slide; in this embodiment, the second receiving slider 413 is slidably connected to the receiving base 401, and the first receiving slider 411 is slidably connected to the second receiving slider The upper surface of the block 413, the third receiving slider 414 is slidably connected to the upper surface of the second receiving slider 413, and slide rails are arranged between the first receiving slider 411, the second receiving slider 413, and the third receiving slider 414. The cylinder body of the first sliding cylinder 412 is fixed to the receiving base 401 and the output shaft is fixed to the first receiving slider 411, the cylinder body of the second sliding cylinder 415 is fixed to the first slider and the output shaft is fixed to the second receiving slider 413, the cylinder body of the third sliding cylinder 416 is fixed to the third slider and the output shaft is fixed to the second slider, and the sliding direction of the second receiving slider 413 and the third receiving slider 414 is consistent with the sliding direction of the first receiving slider 411. The material receiving fork 402 is fixedly connected to the third receiving slider 414, and the material receiving fork 402 can protrude from the side wall of the material receiving frame 403 facing the lower die base 2, and the material receiving frame 403 is installed on the second receiving slider 413. The receiving rack 403 is provided with a buffer spring 404 to prevent the frame from being over-extruded, and the receiving rack 403 has elastic deformation capability, thereby preventing the frame from being extruded and deformed.

[0044] During operation, the mirror frame falls down and abuts against the receiving fork 402, and the relative position of the mirror frame is limited by the receiving rack 403 and the positioning assembly, and then the first sliding cylinder 412 drives the first receiving slider 411, the second receiving slider 413, and the third receiving slider 414 to move synchronously toward the lower mold base 2, so that the mirror frame is close to the position of the lower module 3, and then the second sliding cylinder 415 drives the second receiving slider 413 and the third receiving slider 414 to continue to move toward the lower mold base 2, and the second receiving slider 413 drives the receiving rack 403 to operate and make the mirror frame abut against the lower module 3, so as to achieve the effect of placing the mirror frame on the lower module 3. After completing the above steps, the first sliding cylinder 412 and the second sliding cylinder 415 are pressed again. The third sliding cylinder 416 drives the third receiving slider 414 to move relative to the second receiving slider 413 away from the lower mold base 2, so that the material receiving fork 402 is separated from the material receiving rack 403, that is, when the frame falls, the lower end surface of the frame does not contact the material receiving fork 402, resulting in the frame being unable to be received by the conveying mechanism. When the frame is bent and formed by the lower mold mechanism, the third sliding cylinder 416 is reset to make the material receiving fork 402 protrude from the material receiving rack 403 at one end toward the lower mold base 2, and the lower end surface of the frame can abut against the material receiving fork 402 to achieve normal reception of the frame. The third sliding cylinder 416 is used to control the material receiving fork 402 to slide to avoid receiving multiple frames at one time, thereby ensuring that the conveying mechanism only conveys one frame to the position of the lower module 3 at a time.

[0045] In this embodiment, the material receiving rack 403 is hinged to the side wall of the second receiving slider 413 facing the lower mold base 2, and a rotating torsion spring 421 is installed at the hinged end of the material receiving rack 403 and the second receiving slider 413. The material receiving rack 403 is inclined from bottom to top in a direction away from the lower mold base 2, and the first receiving slider 411 is provided with a connecting rod 422 abutting the material receiving rack 403. The abutting end of the connecting rod 422 and the material receiving rack 403 is located below the rotating torsion spring 421, that is, when the second receiving slider 413 slides toward the lower mold base 2 relative to the first receiving slider 411, the material receiving rack 403 rotates toward the lower mold base 2 with the end of the connecting rod 422 as a fulcrum. When the mirror frame is driven to move toward the lower mold base 2 by the first sliding cylinder 412, the mirror frame is close to the lower module 3. After the second receiving slider 413 is driven to move toward the lower mold base 2 by the second sliding cylinder 415, the second receiving slider 413 drives the material receiving rack 403 to move toward the lower mold base 2, so that the material receiving rack 403 is flipped toward the lower mold base 2 with its abutting end with the connecting rod 422 as a fulcrum, so that the mirror frame is installed in the lower module 3. Position, thereby achieving automatic, efficient and accurate installation of the frame on the lower module 3.

[0046] To ensure that the first receiving slider 411 drives the second receiving slider 413 to move synchronously toward the lower mold base 2 , one end of the first receiving slider 411 toward the lower mold base 2 abuts against the second receiving slider 413 , thereby driving the second receiving slider 413 to move synchronously toward the lower mold base 2 .

[0047] The positioning assembly of the conveying mechanism includes a two-way cylinder 431 (a two-way rodless cylinder, which is a prior art) fixedly connected to the bottom plate 1, two positioning blocks 432 symmetrically arranged at the output ends of the corresponding two-way cylinders 431, and a positioning plate 433 arranged on the positioning block 432 and arranged in an L shape. The two positioning plates 433 are arranged opposite to each other, and the mirror frame is located between the two positioning plates 433. That is, after the mirror frame falls, the lower end surface of the mirror frame abuts against the material receiving fork 402, the side surface of the mirror frame facing away from the lower die seat 2 abuts against the material receiving frame 403, and the two positioning plates 433 can respectively abut against the surface of the mirror frame facing the lower die seat 2 and the side walls of the mirror frame, thereby surrounding the mirror frame. In the present application, the positioning plate 433 is horizontally slidably connected to the positioning block 432, and the sliding direction of the positioning plate 433 is parallel to the sliding direction of the first receiving slider 411. A slide rail structure is provided between the positioning plate 433 and the positioning block 432, and a reset torsion spring 434 for resetting the positioning plate 433 is provided between the positioning plate 433 and the positioning block 432. The positioning plate 433 is provided with a plurality of elastic deformation grooves 435, and the positioning plate 433 has elastic deformation and facilitates the frame to detach from the positioning plate 433. That is, during operation, after the mirror frame falls into the space enclosed by the positioning plate 433, the material receiving rack 403 and the material receiving fork 402, the two positioning plates 433 are driven by the two-way cylinder 431 to move toward each other, so as to realize the positioning of the center of the mirror frame and ensure that the position of the mirror frame is consistent with the corresponding lower module 3. Then, when the material receiving rack 403 pushes the mirror frame into the lower module 3, the mirror frame moves the positioning plate 433 toward the lower mold base 2 for a certain distance. After the positioning plate 433 is elastically deformed, the mirror frame is separated from the positioning plate 433 and then installed into the lower module 3, and the positioning plate 433 is reset by the reset torsion spring 434. The positioning plate 433 slides relative to the positioning block 432 to play a buffering role, thereby avoiding the rigid collision between the positioning plate 433 and the mirror frame. At the same time, the elasticity of the positioning plate 433 facilitates the frame to separate from the positioning plate 433.

[0048] To facilitate limiting the sliding distance of the positioning plate 433, a limit assembly for limiting the sliding position of the positioning block 432 is arranged between the base plate 1 and the positioning block 432, and the limit assembly includes a limit long hole 441 opened on the upper end surface of the positioning block 432, a limit seat 442 fixed to the base plate 1, a limit slider 443 slidably connected to the limit seat 442 along the sliding direction of the positioning block 432, a limit column 444 installed on the upper end surface of the limit slider 443 and passing through the limit long hole 441, and a limit bolt 445 connected to the limit seat 442 and limiting the sliding of the limit slider 443. The length direction of the limiting long hole 441 is set along the sliding direction of the positioning block 432, and a pad 446 is installed at one end of the limiting seat 442 away from the center position of the two positioning blocks 432, and the limiting bolt 445 is installed on the pad 446 and the length direction of the limiting bolt 445 is parallel to the sliding direction of the limiting block. The limiting bolt 445 is penetrated through the pad 446 and is threadedly connected with the end of the limiting slider 443. When the positioning block 432 slides, the limiting column 444 is relative to the limiting long hole 441 and limits the sliding length of the limiting slider 443 through the limiting long hole 441, so as to control the sliding and telescopic distance of the two positioning blocks 432, and the relative position of the limiting column 444 is conveniently adjusted by threading the limiting bolt 445 with the limiting slider 443, which plays a role of convenient adjustment.

[0049] The rotating parts of the lower die mechanism include a rotating shaft 501 mounted on the side wall of the lower die base 2, a rotating cylinder 502 fixed to the bottom plate 1 and driving the rotating shaft 501, a gear 503 fixed to the rotating shaft 501, a rack 504 slidably connected to the bottom plate 1 and meshing with the gear 503, and a driving cylinder 505 fixed to the bottom plate 1 and driving the rack 504 to slide. In this embodiment, the rotating shaft 501 is driven by the driving cylinder 505 to rotate 90°, and the rotating cylinder 502 drives the rotating shaft 501 to rotate 180°. When in use, the rack 504 is driven to move by driving the cylinder 505, and the rotating shaft 501 is driven to rotate by the rack 504, that is, the gear 503, so that the lower mold base 2 is rotated 90 degrees toward the conveying mechanism, which is convenient for the conveying mechanism to convey the frame to the lower module 3. After the bending forming of the frame is completed, the lower mold base 2 is driven to rotate 180 degrees by the rotating cylinder 502, so that the lower mold base 2 and the lower module 3 are facing downward, which is convenient for the frame to fall off and realize the automatic unloading function.

[0050] The bottom plate 1 is fixedly mounted with a support 511 that is rotatably connected to the lower die base 2. The support 511 and the rotating shaft 501 are arranged on both sides of the lower die base 2. The side wall of the support 511 is fixed with an L-shaped control block 512 that controls the rotation angle of the lower die base 2. The upper surface of the lower die base 2 can abut against the lower surface of the L-shaped control block 512, and after the lower die base 2 is flipped 180 degrees, the lower die base 2 can abut against the upper surface of the L-shaped control block 512. The lower die base 2 is provided with two hydraulic buffers 513 that can respectively abut against the upper and lower surfaces of the L-shaped control block 512. The L-shaped control block 512 can effectively position the lower die base 2 to rotate 180°, and ensure that the lower die base 2 is in a vertical upward state or downward state. At the same time, the hydraulic buffer 513 plays a buffering and noise reduction function. A fixing assembly is provided between the base plate 1 and the lower die base 2 to prevent the lower die base 2 from flipping over after being pressurized. The fixing assembly includes a fixing protrusion 521 provided on the lower die base 2 and protruding from the side wall of the lower die base 2, a fixing connecting rod 522 rotatably connected to the base plate 1 at one end, a fixing protrusion 523 provided on the fixing connecting rod 522 and abutting against the upper end surface of the fixing protrusion 521, and a fixing cylinder 524 provided on the base plate 1 and driving the fixing connecting rod 522 to rotate toward the lower die base 2. The fixing protrusion 521 protrudes from the side wall of the lower die base 2 away from the conveying mechanism. Since the force on the lower die base 2 is uneven when the frame is extruded, it is easy to cause the lower die base 2 to deflect during extrusion. In this embodiment, the lower die base 2 can only deflect toward the conveying mechanism. Therefore, the lower die base 2 is limited to deflect toward the conveying mechanism by a fixed component. After the fixed connecting rod 522 is driven to rotate a certain angle by the fixed cylinder 524, the fixed protrusion 523 abuts against the upper end surface of the fixed protrusion 521, thereby limiting the lower die base 2 from deflecting toward the conveying mechanism.

[0051] The installation and adjustment components of the lower mold mechanism include a main bracket 601 installed on the upper end surface of the lower mold base 2, two sub-brackets 602 arranged on both sides of the main bracket 601, and an angle adjustment component arranged between the lower mold base 2 and the main bracket 601 for adjusting the bending angles of the two lower modules 3.

[0052] Each lower module 3 is equipped with four horizontally arranged pins 611, the four pins 611 are symmetrical in pairs, the axes of the pins 611 are perpendicular to the rotation axis of the lower die base 2, and the four pins 611 are respectively connected to the corresponding main bracket 601 and the sub-bracket 602, the sub-bracket 602 is provided with two sub-slots 612 for the corresponding pins 611 to be inserted, the side walls of the main bracket 601 facing the two sub-brackets 602 are provided with two main slots 613 aligned with the sub-slots 612, the sub-slots 612 and the main slots 613 are both U-shaped, and the sub-slots 612 and the corresponding main slots 613 are arranged opposite to each other. In addition, in this embodiment, the sub-bracket 602 is connected to the lower die base 2 in a sliding manner toward the main bracket 601, and the lower die base 2 is equipped with two springs 614 that respectively push the corresponding sub-bracket 602 to move toward the main bracket 601.

[0053] When installing the lower module 3, pull the sub-bracket 602 and move the sub-bracket 602 away from the main bracket 601, so as to facilitate the placement of the lower module 3 between the sub-bracket 602 and the main bracket 601, and make the pin shaft 611 of the lower module 3 respectively snap into the corresponding main slot 613 and the sub-slot 612, and then the spring 614 is used to reset and drive the sub-bracket 602 to move toward the main bracket 601, ensuring that the pin shaft 611 is snapped into the corresponding main slot 613 and the sub-slot 612, so as to fix the lower module 3 and realize quick and convenient installation of the lower module 3.

[0054] A positioning pin 615 for limiting and positioning the sliding position of the corresponding sub-bracket 602 is also installed on the lower die base 2. The positioning pin 615 can abut against the side wall of the sub-bracket 602 facing the main bracket 601. The positioning pin 615 can be used to locate the position of the sub-bracket 602 sliding toward the main bracket 601. After the lower module 3 is removed, the sub-bracket 602 abuts against the positioning pin 615, and the position of the sub-bracket 602 can be limited.

[0055] The angle adjustment assembly includes an adjustment column 621 that is inserted through the lower die base 2 and slidably connected to the lower die base 2, a through hole 622 that is opened in the lower die base 2 and through which the adjustment column 621 is inserted, and a locking bolt 623 that is threadedly connected to the lower die base 2 and can be inserted into the through hole 622. The main bracket 601 is clamped on the adjustment column 621 and moves synchronously with the adjustment column 621. A scale 624 is provided on the side wall of the adjustment column 621. When in use, the adjustment column 621 is adjusted relative to the through hole 622 by loosening the locking bolt 623, so that the height of the main bracket 601 relative to the lower die base 2 is adjusted, and the position of the adjustment base is determined by the position of the scale 624 protruding from the lower die base 2, and then the locking bolt 623 is tightened to adjust the relative rotation angle of the two lower modules 3.

[0056] Due to the assembly error during assembly, a pre-adjustment component for adjusting the centerline position of the lens frame is provided on the main support 601. The pre-adjustment component includes a pre-adjustment seat 631 installed on the main support 601, a pre-adjustment block 632 slidably connected to the pre-adjustment seat 631 and capable of abutting and positioning the center of the lens frame, the pre-adjustment block 632 is located at the centerline position between the two lower modules 3, and the sliding direction of the pre-adjustment block 632 is along the centerline direction between the two lower modules 3. To facilitate the disassembly and assembly of the pre-adjustment seat 631 and the pre-adjustment block 632, the main bracket 601 is installed with a lifting column 633. The pre-adjustment seat 631 is slidably connected to the lifting column 633 along the vertical direction, and the pre-adjustment seat 631 can slide upward and then detach from the lifting column 633, and the pre-adjustment block 632 can slide away from the pre-adjustment seat 631 along the center line direction between the two lower modules 3, and the pre-adjustment block 632 can slide toward the frame. The direction of the frame can be abutted against the two nose bridges of the frame, and the center position of the frame can be positioned through the pre-adjustment block 632, thereby determining and adjusting the position of the lower module 3, effectively improving the assembly accuracy, and being able to conveniently disassemble the pre-adjustment block 632 and the pre-adjustment seat 631, which is convenient for operation.

[0057] The frame clamping and fixing parts of the lower mold mechanism include a clamping cylinder 701 installed on the lower mold base 2 and pointing vertically upward, a clamping connection block 702 installed on the output shaft of the clamping cylinder 701, and a V-shaped clamping spring 703 installed on the clamping connection block 702. The two facing side walls of the two lower modules 3 are provided with a control groove 704 for the clamping spring 703 to pass through. The clamping spring 703 is fixedly connected with two clamping protrusions 705 respectively abutting against the inner wall of the lens frame. In this embodiment, the clamping cylinder 701 is fixedly installed in the adjustment column 621 and is set vertically upward. The clamping connection block 702 can move up and down relative to the lower mold base 2 and can abut against the upper surface of the main bracket 601. The clamping spring 703 is elastic. The inner wall of the lens frame is generally provided with a lens groove for clamping and fixing the lens. In this embodiment, the clamping protrusion 705 corresponds to the lens groove in the lens frame and can be clamped into the lens groove. When in use, the frame is first installed on the two lower modules 3. At this time, the V-shaped ends of the clamping spring 703 are respectively inserted into the corresponding lens frame, and then the clamping connecting block 702 and the clamping spring 703 are driven by the clamping cylinder 701 to move toward the lower mold base 2. After the V-shaped side wall of the clamping spring 703 abuts against the bottom surface of the control groove 704, the two V-shaped side walls of the clamping spring 703 move closer to each other, so that the clamping protrusion 705 moves towards each other and abuts against the inner wall of the lens frame, thereby clamping and fixing the frame, and the clamping protrusion 705 can be inserted into the lens groove to further ensure that the frame is fixed.

[0058] A forming die 706 for the mirror frame beam to abut is fixed on the clamping connection block 702, that is, the mirror frame beam abuts against the forming die 706 and the mirror frame beam is bent and fits on the surface of the forming die 706, thereby realizing the bending forming of the mirror frame.

[0059] The clamping connection block 702 is provided with a placement positioning plate 711 for the lower surface of the frame to abut against. The placement positioning plate 711 and the clamping spring piece 703 are located in the same vertical plane position, and the placement positioning plate 711 is located in the V-shaped inner cavity of the clamping spring piece 703. Rubber sleeves (not marked in the figure) that abut against the lower surface of the frame are worn at both ends of the placement positioning plate 711. In order to facilitate the adjustment of the height of the placement positioning plate 711 and ensure that it abuts against the lower surface of the frame, an adjustment block 712 that is worn through the clamping connection block 702 is integrally formed on the lower end surface of the placement positioning plate 711. The adjustment block 712 is worn through the clamping connection block 702 from top to bottom. The side wall of the clamping connection block 702 is threadedly connected with an adjustment bolt (not marked in the figure) that can abut against the clamping connection block 702. The adjustment bolt abuts against and limits the upward and downward movement of the adjustment block 712. By raising and lowering the adjustment block 712, the adjustment bolt abuts and fixes the adjustment block 712 relative to the clamping connection block 702, and the position of the adjustment block 712 is adjusted and fixed to ensure that the positioning plate 711 is in contact with the lower surface of the frame. At the same time, the positioning plate 711 is placed to ensure that the frame can be placed flat.

[0060] The bending forming process of the frame by the lower mold device is as follows: the heated frame falls and abuts against the receiving fork 402, and after the frame falls into the space surrounded by the positioning plate 433, the receiving rack 403, and the receiving fork 402, the two positioning plates 433 are driven to move toward each other by the two-way cylinder 431 to realize the positioning of the center of the frame and ensure that the position of the frame is consistent with the corresponding lower module 3; then the first receiving slider 411, the second receiving slider 413, and the third receiving slider 414 are driven by the first sliding cylinder 412 to move synchronously toward the lower mold base 2, so that the frame is close to the position of the lower module 3. At this time, the lower mold base 2 rotates 90° and makes the lower module 3 face the receiving rack 403, and then the second sliding cylinder 415 drives the second receiving slider 415 to move toward the lower mold base 2. The receiving slider 413 and the third receiving slider 414 continue to move toward the lower die base 2, and the receiving rack 403 flips toward the lower module 3 to install the frame on the lower module 3; the clamping connecting block 702 and the clamping spring piece 703 are driven by the clamping cylinder 701 to move toward the lower die base 2, and the clamping spring piece 703 drives the clamping protrusion 705 to clamp into the lens groove to clamp and fix the frame; then the driving cylinder 505 drives the lower die base 2 to reverse 90° so that the lower die base 2 and the lower module 3 are facing upward, and the frame is squeezed and bent by the upper and lower die mechanisms to be bent to a certain angle, and then the lower die base 2 is driven to rotate 180° by the rotating cylinder 502, and the formed frame falls off when the lower module 3 is facing downward.

[0061] In this embodiment, in order to facilitate the disassembly and assembly of the lower mold device, the bottom plate 1 can slide horizontally relative to the frame bending machine, and a U-shaped rotation axis groove 801 is opened at the corner position of one end of the bottom plate 1. The U-shaped opening direction of the rotation axis groove 801 is parallel to the side of the bottom plate 1. The bottom plate 1 is provided with a limiting cylinder 803 for limiting the rotation and sliding of the bottom plate 1 relative to the frame bending machine. The limiting cylinder 803 is located at the corner position of one end of the bottom plate 1 away from the rotation axis groove 801. The output shaft of the limiting cylinder 803 is vertically downwardly arranged and can protrude from the lower end surface of the bottom plate 1. The frame bending machine is provided with an axis that penetrates the rotation axis groove 801, and a groove is opened for the output shaft of the limiting cylinder 803 to penetrate. The lower mold device is conveniently fixed by the rotation axis groove 801 and the limiting cylinder 803, and the lower mold device is conveniently disassembled and moved, which is convenient for replacing the lower module 3 or performing maintenance.

[0062] In this document, the directions or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", and "horizontal" are based on the directions or positional relationships shown in the accompanying drawings and are only for the clarity of expressing the technical solutions and the convenience of description, and therefore should not be understood as limitations of the present invention.

[0063] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A lower die device for a frame bending machine, characterized in that: The invention comprises a bottom plate (1) arranged on a spectacles frame bending and forming machine, a conveying mechanism arranged on the bottom plate (1) and used for conveying spectacles frames, and a lower die mechanism for fixing and installing the conveyed spectacles frames; the lower die mechanism comprises a lower die seat (2) rotatably connected to the bottom plate (1), a lower die block (3) arranged on the lower die seat (2) and used for mounting the spectacles frames, a rotating component for driving the lower die seat (2) to rotate, a clamping and fixing component for clamping and fixing the spectacles frames, and an installation and adjustment component for installing and adjusting the relative angles of the two lower die blocks (3); the rotation axis of the lower die seat (2) is arranged horizontally; The conveying mechanism comprises a receiving base (401) arranged on the bottom plate (1), a sliding assembly arranged on the base and sliding toward the lower die seat (2), a material receiving fork (402) arranged on the sliding assembly and abutting against the lower end surface of the frame, a material receiving rack (403) arranged on the sliding assembly and abutting against the side wall of the frame facing away from the lower die seat (2), and a positioning assembly arranged on the bottom plate (1) for positioning the frame; the sliding assembly comprises a first receiving slider (411) sliding horizontally relative to the receiving base (401), a first sliding cylinder (412) for driving the first receiving slider (411) to slide toward the lower die seat (2), a second receiving slider (413) sliding horizontally relative to the first receiving slider (411), a third receiving slider (414) sliding horizontally relative to the second receiving slider (413), and a second sliding cylinder (415) for driving the second receiving slider (413) to slide. ), a third sliding cylinder (416) for driving the third receiving slider (414) to slide, the sliding direction of the second receiving slider (413) and the third receiving slider (414) is consistent with the sliding direction of the first receiving slider (411), the material receiving fork (402) is fixedly connected to the third receiving slider (414), the material receiving frame (403) is hinged to the second receiving slider (413), and the material receiving frame (403) and the second receiving slider (411) are connected. 3) is provided with a rotating torsion spring (421), the material receiving frame (403) is inclined from bottom to top in a direction away from the lower die base (2), the first receiving slider (411) is provided with a connecting rod (422) abutting against the material receiving frame (403), after the second receiving slider (413) slides toward the lower die base (2) relative to the first receiving slider (411), the material receiving frame (403) rotates toward the lower die base (2) with the end of the connecting rod (422) as a fulcrum; The installation and adjustment component comprises a main support (601) arranged on the upper end surface of the lower die base (2), two sub-supports (602) arranged on both sides of the main support (601), a mounting component arranged between the lower die base (2) and the sub-supports (602) and driving the sub-supports (602) to move and fix the lower die block (3), and an angle adjustment component arranged between the lower die base (2) and the main support (601) and used to adjust the bending angles of the two lower die blocks (3); The sub-bracket (602) is slidably connected to the lower die base (2) in the direction of the main bracket (601), and the lower die base (2) is provided with a spring (614) for pushing the sub-bracket (602) to move toward the main bracket (601), the angle adjustment component comprises an adjustment column (621) penetrating the lower die base (2) and slidably connected to the lower die base (2), a penetration hole (622) opened in the lower die base (2) and for the adjustment column (621) to penetrate, and a locking bolt (623) threadedly connected to the lower die base (2) and penetrated into the penetration hole (622), and the main bracket (601) is connected to the adjustment column (621) and moves synchronously with the adjustment column (621); The positioning assembly comprises a bidirectional cylinder (431) fixedly connected to the base plate (1), two positioning blocks (432) symmetrically arranged at the output ends of the corresponding bidirectional cylinders (431), and a positioning plate (433) arranged on the positioning block (432) and arranged in an L shape, the two positioning plates (433) being arranged opposite to each other, and the mirror frame being located between the two positioning plates (433); the positioning plate (433) being horizontally slidably connected to the positioning block (432), and the sliding direction of the positioning plate (433) being parallel to the sliding direction of the first receiving slider (411), and a reset torsion spring (434) for resetting the positioning plate (433) being arranged between the positioning plate (433) and the positioning block (432); During operation, the mirror frame falls down and abuts against the receiving fork (402), and the relative position of the mirror frame is limited by the receiving frame (403) and the positioning assembly, and then the first sliding cylinder (412) drives the first receiving slider (411), the second receiving slider (413), and the third receiving slider (414) to move synchronously toward the lower mold base (2), so that the mirror frame is close to the position of the lower module (3), and then the second sliding cylinder (415) drives the second receiving slider (413) and the third receiving slider (414) to continue to move toward the lower mold base (2), and the second receiving slider (413) drives the receiving frame (403) to operate and make the mirror frame abut against the lower module (3), so as to achieve the effect of placing the mirror frame on the lower module (3). After completing the above steps, the first sliding cylinder (412) and the second sliding cylinder (415) are driven to move the mirror frame to the lower mold base (2). 5) Reset, the third sliding cylinder (416) drives the third receiving slider (414) to move relative to the second receiving slider (413) away from the lower mold base (2), so that the receiving fork (402) is separated from the receiving rack (403), that is, when the frame falls, the lower end surface of the frame does not contact the receiving fork (402), resulting in the frame being unable to be received by the conveying mechanism. When the frame is bent and formed by the lower mold mechanism, the third sliding cylinder (416) is reset to make the receiving fork (402) protrude from the receiving rack (403) toward one end of the lower mold base (2), and the lower end surface of the frame abuts against the receiving fork (402), and the frame is received normally. The third sliding cylinder (416) is used to control the receiving fork (402) to slide to avoid receiving multiple frames at one time, thereby ensuring that the conveying mechanism only conveys one frame to the position of the lower module (3) at a time.

2. The lower die device of the frame bending machine according to claim 1, characterized in that: The rotating component comprises a rotating shaft (501) arranged on the side wall of the lower mold base (2), a rotating cylinder (502) arranged on the bottom plate (1) and driving the rotating shaft (501), a gear (503) arranged on the rotating shaft (501), a rack (504) slidably connected to the bottom plate (1) and meshing with the gear (503), and a driving cylinder (505) arranged on the bottom plate (1) and driving the rack (504) to slide.

3. The lower die device of the frame bending machine according to claim 1, characterized in that: A fixing assembly is provided between the base plate (1) and the lower die base (2) to prevent the lower die base (2) from turning over after being pressed, and the fixing assembly comprises a fixing protrusion (521) provided on the lower die base (2) and protruding from the side wall of the lower die base (2), a fixing connecting rod (522) rotatably connected to the base plate (1) at one end, a fixing protrusion (523) provided on the fixing connecting rod (522) and abutting against the upper end surface of the fixing protrusion (521), and a fixing cylinder (524) provided on the base plate (1) and driving the fixing connecting rod (522) to rotate toward the lower die base (2).

4. The lower die device of the frame bending machine according to claim 3, characterized in that: The bottom plate (1) is provided with a support (511) rotatably connected to one end of the lower die base (2) away from the rotating shaft (501); the side wall of the support (511) is provided with an L-shaped control block (512) for controlling the rotation angle of the lower die base (2); the upper surface of the lower die base (2) abuts against the lower surface of the L-shaped control block (512); and after the lower die base (2) is flipped 180 degrees, the lower die base (2) abuts against the upper surface of the L-shaped control block (512); the lower die base (2) is provided with two hydraulic buffers (513) respectively abutting against the upper surface and lower surface of the L-shaped control block (512).

5. The lower die device of the frame bending machine according to claim 1, characterized in that: The clamping and fixing component comprises a clamping cylinder (701) arranged on the lower mold base (2) and pointing vertically upward, a clamping connection block (702) arranged on the output shaft of the clamping cylinder (701), and a V-shaped clamping spring piece (703) arranged on the clamping connection block (702). The two facing side walls of the two lower mold blocks (3) are provided with a control groove (704) for the clamping spring piece (703) to pass through. The clamping spring piece (703) is fixedly connected to two clamping protrusions (705) respectively abutting against the inner wall of the lens frame.

6. The lower die device of the frame bending machine according to claim 1, characterized in that: The bottom plate (1) slides horizontally relative to the frame bending machine, a U-shaped rotation axis groove (801) is provided at a corner position of one end of the bottom plate (1), and the bottom plate (1) is provided with a limiting cylinder (803) for limiting the rotation and sliding of the bottom plate (1) relative to the frame bending machine, and the output shaft of the limiting cylinder (803) is vertically arranged downward and protrudes from the lower end surface of the bottom plate (1).

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