Television backboard limiting clamping frame forming device and forming method thereof

Abstract

The invention discloses a television backboard limiting and clamping frame forming device and a forming method thereof.The television backboard limiting and clamping frame forming device comprises a pressing and clamping die, a shearing die, a flanging die, a flanging pre-forming die, a flanging sizing die and a shaping die, and the shearing die is used for being matched with the flanging die to cut and form a flanging edge contour line of a semi-finished backboard; the flanging die is used for being matched with the pressing and clamping die to form a continuous straight wall; the flanging pre-forming die is used for being matched with the shaping die to complete pre-forming of a plurality of limiting buckle plates and a plurality of limiting clips on the continuous straight wall so as to form a first C fold and a second C fold with inward openings; and the flanging sizing die is used for being matched with the shaping die to adjust the opening sizes of the first C fold and the second C fold, and is used for being matched with the shaping die to complete the complete forming of the limiting clip. The limiting and clamping frame structure can be clamped and formed at a time, adjustment can be conducted according to the size requirements of frames of different specifications, and the forming quality and precision of the limiting and clamping frame structure are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of television back panel molding equipment, in particular to a television back panel limiting clamping frame molding device and a molding method thereof. Background Art

[0002] The TV back panel is an important component of the TV screen, which plays a role in bearing and protection. It is often assembled with other screen components through a special structure frame. Its dimensional accuracy and molding quality are important factors affecting the performance of the TV back panel. The back panel frame structure is usually formed by flanging technology, but for the frame structure with more complex structure, it is difficult to form it in one go using common stamping and flanging equipment. It needs to be completed in steps by multiple stamping equipment. Moreover, when the TV back panel needs to adjust the size specifications of its frame structure, the adjustment accuracy between multiple devices is difficult to coordinate, which can easily affect the final molding quality of the back panel. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a TV back panel limit snap-in frame forming device and a forming method thereof, which can clamp and form a limit snap-in frame structure in one time, and can be adjusted according to the requirements of frame sizes of different specifications, thereby ensuring the forming quality and precision of the limit snap-in frame structure.

[0004] Technical solution: To achieve the above-mentioned purpose, the present invention provides a device for forming a TV back panel limit clamping frame and a forming method thereof, comprising a clamping die, a shearing die, a flanging die, a folding preforming die, a folding shaping die and a shaping die, wherein the clamping die is used to clamp and fix the non-folded portion in the middle of the semi-finished back panel, and the shearing die is used to cooperate with the flanging die to cut and shape the folding edge contour line of the semi-finished back panel;

[0005] The flanging die is used to cooperate with the clamping die to form a continuous straight wall, and the continuous straight wall is perpendicular to the edge surface of the semi-finished back plate;

[0006] The folding preforming die is used to cooperate with the shaping die to complete the preforming of multiple limiting buckles and multiple limiting clips on the continuous straight wall, so as to form a first C-fold and a second C-fold with openings inward, wherein the first C-fold is a C-fold structure with the limiting clip, and the second C-fold is a C-fold structure without the limiting clip;

[0007] The folding shaping die is used to cooperate with the shaping die to adjust the opening size of the first C-fold and the second C-fold, and is used to cooperate with the shaping die to complete the complete forming of the limiting clip.

[0008] Furthermore, the flanging die is fixedly arranged, and the clamping die includes a lower supporting die and an upper pressing die. The upper pressing die and the lower supporting die clamp the middle part of the semi-finished back panel and move it downward relative to the upper end surface of the flanging die. When the upper pressing die is pushed to the lower limit position, the edge of the semi-finished back panel is clamped and limited to form the continuous straight wall between the adjacent vertical surfaces of the flanging die and the upper pressing die.

[0009] Furthermore, the shaping die is located at the edge of the upper end surface of the upper pressure die, the folding pre-forming die is fitted to the upper end surface of the flanging die and is laterally moved close to the shaping die, the side of the folding pre-forming die close to the shaping die is a forming surface, and the forming surface includes a right-angle surface corresponding to the limiting buckle plate and an inclined surface corresponding to the limiting clip, and the folding pre-forming die pushes the limiting buckle plate and the limiting clip to contact the shaping die to form their respective root creases.

[0010] Furthermore, the shaping mold includes a pressure plate corresponding to the limiting buckle plate, and the folding shaping mold includes a pressure piece corresponding to the limiting buckle plate. The side of the pressure plate close to the fold of the limiting buckle plate is hinged to the upper end of the first adjusting piece, and a second adjusting piece is arranged below the side of the pressure plate away from the fold of the limiting buckle plate. The first adjusting piece and the second adjusting piece are both vertically lifted and lowered; the pressure piece presses the limiting buckle plate to fit the upper side of the pressure plate, and the bottom surface of the pressure plate contacts and abuts against the upper end surface of the second adjusting piece.

[0011] Furthermore, the side of the pressure plate away from the fold of the limiting buckle plate is connected to the lower end of the guide slide plate through a hinge, the guide slide plate rises and falls and slides along the vertical guide groove, and the end of the guide slide plate is connected to the corresponding groove end face of the vertical guide groove through an elastic reset member.

[0012] Furthermore, the pressure member includes a driving block and a rolling assembly, and the lower end of the driving block and the upper end of the rolling assembly are slidably matched through an inclined guide surface, so that when the driving block moves downward, it drives the rolling assembly to roll from the fold at the root of the limiting buckle plate to the end until it is completely in contact with the pressure plate.

[0013] Furthermore, the shaping mold also includes a molding die corresponding to the limiting clip, and the folding shaping mold also includes a molding convex mold corresponding to the limiting clip, the molding convex mold corresponds to the molding die up and down, the molding die is fixedly connected to the adjacent first adjusting member, and the molding convex mold is fixedly connected to the driving block.

[0014] Furthermore, the outer vertical surface of the flanging die is a trimming contour surface, and the lower end of the shearing die includes a clamping part and a shearing part. The clamping part is pressed together with the upper end surface of the flanging die to clamp the edge of the semi-finished back panel, and the shearing part cooperates with the trimming contour surface to cut off the waste edge.

[0015] Furthermore, the flanging die includes a fixed part and a movable part, the fixed part is abutted against the side of the clamping die, the movable part is located on the side of the fixed part away from the clamping die, and the movable part is movably arranged along the vertical direction of the corresponding back panel edge.

[0016] Further, the following steps are included:

[0017] S1. Fix the middle part of the semi-finished back plate by clamping the clamping die, and determine the position of the edge line of the limit clip by moving and adjusting the movable part and the corresponding shearing die;

[0018] S2, by moving the shearing die downward, the clamping part first presses the edge of the back plate contour, and then the shearing part cuts off the waste edge;

[0019] S3, resetting the shearing die, and driving the middle of the semi-finished back plate to move downward relative to the flanging die by the clamping die, until the edge of the semi-finished back plate is completely fitted with the inner side of the flanging die after the waste edge is cut off, and the flanging is completed;

[0020] S4, vertically adjusting the height of the first adjusting member until the outer edge of the forming die corresponds to the crease position of the root of the upper limit clip of the edge of the semi-finished back plate after the waste edge is cut, and the semi-finished back plate after flanging is driven by the clamping die to move up until the outer edge of the forming die is flush with the upper end surface of the flanging die;

[0021] S5, the folding preforming die is used to push the limiting buckle plate sideways to bend it to be perpendicular to the continuous straight wall, and the limiting clip is pushed sideways to bend it to be inclined upward;

[0022] S6, reset the hemming preforming die, vertically adjust the height of the second adjusting piece, until the inclination angle when the pressure plate contacts the top of the second adjusting piece is consistent with the inclination angle of the limit buckle plate and the forming, and the hemming shaping die moves down to drive the rolling assembly to fit the upper side of the limit buckle plate and roll from the root crease position to the end until the pressure plate contacts the top of the second adjusting piece, and the forming convex die is just pressed into place relative to the forming concave die, and the pressure is maintained for a period of time;

[0023] S7, the rolling assembly rolls off the end of the limit buckle plate, directly applies pressure on the pressure plate, moves the first adjustment member downward until the pressure plate is straight, and at the same time the upper die rises to lift the processed back plate away from the lower support die, and finally removes the processed back plate from the upper die.

[0024] Beneficial effects: The device and method for forming a television back panel limit-clip frame of the present invention realizes the complete forming of the frame structure after one clamping through the coordinated cooperation of a clamping die, a shearing die, a flanging die, a folding preforming die, a folding shaping die, and a shaping die, which is efficient and reliable. The position of the contour of the limit clip relative to the outer edge is adjusted by an adjustable shearing die, so as to determine the inner folding height, so as to adjust the forming to adapt to different frame thicknesses. The folding preforming die and the folding shaping die are operated successively to complete the step-by-step forming of the frame C-fold structure and the limit clip, ensure the forming quality, realize the adjustment of the C-fold opening, and ensure the accuracy of the C-fold opening. In general, the limit-clip frame structure can be clamped and formed in one time, and can be adjusted according to the requirements of frame sizes of different specifications, so as to ensure the forming quality and accuracy of the limit-clip frame structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the cross-sectional structure of the position-limiting clip of one embodiment of the position-limiting clip frame of the present invention;

[0026] Figure 2 It is a structural schematic diagram of a cross section where a limit gusset plate is located in one embodiment of a frame forming device of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the cross section where the limiting clip is located in one embodiment of the frame forming device of the present invention. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] As attached Figure 1-3 The device and method for forming a TV back panel limit clamping frame include a clamping die 1, a shearing die 2, a flanging die 3, a folding preforming die 4, a folding shaping die 5 and a shaping die 6. The clamping die 1 is used to clamp and fix the non-folding part in the middle of the semi-finished back panel 7.

[0030] The flanging die 3 is used to cooperate with the clamping die 1 to form a continuous straight wall 71, and the continuous straight wall 71 is perpendicular to the edge surface of the semi-finished back plate 7;

[0031] The folding preforming mold 4 is used to cooperate with the shaping mold 6 to complete the preforming of multiple limiting buckles 72 and multiple limiting clips 73 on the continuous straight wall 71, so as to form a first C-fold and a second C-fold with openings facing inward, wherein the first C-fold is a C-fold structure with the limiting clip 73, and the second C-fold is a C-fold structure without the limiting clip 73; the shearing mold 2 is used to cooperate with the flanging mold 3 to cut and form the folding edge contour line of the first C-fold of the semi-finished back panel; it is mainly used to cut out the contour line of the limiting clip.

[0032] The folding shaping die 5 is used to cooperate with the shaping die 6 to adjust the opening size of the first C-fold and the second C-fold, and is used to cooperate with the shaping die 6 to complete the complete forming of the limiting clip 73.

[0033] In an embodiment, three sides of a television back panel are folded to form a limiting card-jointed frame, and one side is open for the insertion of a card-jointed object, wherein the folded edge structure located on both sides of the insertion port is a second C-fold, and the folded edge structure opposite to the insertion port is a first C-fold. After the card-jointed object is inserted from the insertion port side, it is pushed along the inner grooves of the second C-fold on both sides to contact the first C-fold, and the clamping hole on the card-jointed object is clamped with the limiting clamp 73 corresponding to the first C-fold, and the card-jointed object is fitted with the limiting buckle plates of each C-fold frame.

[0034] This solution can be clamped at one time, and stamped in sequence according to the steps of flanging-pre-folding-folding shaping, so as to form a three-side folding structure synchronously, and can be adjusted accordingly according to the size specification requirements. It also ensures that the thickness of the frame structure along the contour line is uniform, the opening degree of the three-side C-folding structure is consistent, and the height difference between the root fold of the first C-fold limit buckle plate 72 and the root fold of the limit clip 73 is fixed, so that the lateral misalignment gap between the limit buckle plate and the limit clip just allows the thickness of a single clamping object to be clamped in, thereby ensuring that the limit clip can constrain the clamping object to be close to the limit buckle plate of the three-side frame.

[0035] The flanging die 3 is fixedly arranged, and the upper end surface of the flanging die is used as a base plane. The clamping die 1 includes a lower support die 11 and an upper die 12. When the semi-finished back panel 7 is clamped, the lower support die 11 is moved to be flush with the upper end surface of the flanging die. The lower support die 11 adopts a concave die structure. Except for the part that is flush with the upper end surface of the flanging die, the middle part is set as an avoidance groove or a concave die structure adapted to the complex profile in the middle of the back panel. The lower end surface of the upper die 12 is a plane, which is used to clamp the straight edge part of the back panel together with the lower support die. When three-side folding is performed, the upper die 12 and the lower support die 11 clamp the middle part of the semi-finished back panel 7 and move downward relative to the upper end surface of the flanging die 3. When the upper die 12 is pushed to the lower limit position, the edge clamping limit of the semi-finished back panel 7 forms the continuous straight wall 71 between the adjacent vertical surfaces of the flanging die 3 and the upper die 12. This action is completed by the clamping die 1 and the flanging die 3, which can simultaneously form the straight wall parts of the three side frames relative to the back plate plane in one step, and form the three side straight walls into an integrated continuous straight wall, which constrains the contour edge position of the frame and ensures the stability of the straight wall part. It is not easy to bend relative to the back plate plane to cause multiple side frames to expand outward or gather inward, so that the side wall surface of the entire frame is not easy to deform, is more stable, and the inner side surface size is more adapted to fit the outer contour surface of the card connection object.

[0036] The shaping die 6 is located at the upper end face edge of the upper die 12, and can perform multi-directional simultaneous inward folding actions on the basis of the clamping die continuing to clamp and fix the middle part of the semi-finished back plate. The arm part is directly in contact with the vertical side of the upper die 12 to ensure that the lateral folding action does not affect the formed middle structure and the straight wall root forming crease. The folding preforming die 4 is in contact with the upper end face of the flanging die 3 and moves laterally close to the shaping die 6. The side of the folding preforming die 4 close to the shaping die 6 is a forming surface, and the forming surface includes a right-angle surface corresponding to the limit buckle plate 72 and an inclined surface corresponding to the limit clip 73. The folding preforming die 4 pushes the limit buckle plate 72 and the limit clip 73 to contact the shaping die 6 to form their respective root creases. The folding positions of the limiting buckle plate and the limiting clip relative to the continuous straight wall are determined by the cooperation of the folding preforming die 4 and the plastic die. The approximate deflection trend of the limiting buckle plate and the limiting clip is first determined, wherein the limiting buckle plate is bent inward relative to the straight wall portion at an angle greater than 90°. After the final forming, the limiting buckle plate forms a small-angle inner buckle structure. After being clamped with the clamping object, the limiting buckle plates on the three sides respectively apply clamping forces in three directions to the clamping object to ensure that the back plate and the clamping object are firmly clamped, for example, to ensure that the back plate of the TV and the screen assembly are firmly clamped. The limiting clip is bent inward at a lower position relative to the limiting buckle plate and bent upward near the end, thereby forming a limiting gap between the limiting buckle plate and the inner folded part of the limiting clip for the edge of the clamping object to be clamped in, and at the same time, the upper folded part of the limiting clip is clamped into the clamping hole of the clamping object to constrain the reverse movement of the clamping object relative to the insertion direction.

[0037] The shaping mold 6 includes a pressure plate 61 corresponding to the limiting buckle plate 72, and the folding shaping mold 5 includes a pressure piece 51 corresponding to the limiting buckle plate 72. The side of the pressure plate 61 close to the fold of the limiting buckle plate 72 is hinged to the upper end of the first adjusting piece 63, and the side of the pressure plate 61 away from the fold of the limiting buckle plate 72 is provided with a second adjusting piece 64 below the side of the pressure plate 61 away from the fold of the limiting buckle plate 72. The first adjusting piece 63 and the second adjusting piece 64 are both vertically raised and lowered; the pressure piece 51 presses the limiting buckle plate 72 to fit with the upper side surface of the pressure plate 61, and the bottom surface of the pressure plate 61 contacts and abuts against the upper end surface of the second adjusting piece 64.

[0038] The position of the fold of the limiting buckle plate 72 corresponding to the pressure plate 61 is set as an arc surface. When the folding pre-forming mold 4 is pushed sideways, the root of the limiting buckle plate 72 gradually contacts the arc surface until the upper side surface of the limiting buckle plate 72 is lifted and fitted with the right-angle surface of the folding pre-forming mold 4 to form a transitional fold of an arc. The position of the fold determines the height of the continuous straight wall, that is, the thickness of the frame structure. By raising and lowering the height of the first adjusting member 63, the height position of the arc surface can be changed, thereby adjusting the forming thickness of the limiting clamping frame structure. The first adjusting members of the three side frames are raised and lowered synchronously to ensure that the thickness of the three sides of the entire frame structure is uniform.

[0039] The hinged relationship between the pressure plate 61 and the first adjusting member 63 ensures that the inclination angle of the pressure plate 61 can be adjusted while the fold height position remains unchanged. The final shaping is completed by pressing the limiting buckle plate 72 and fitting it with the pressure plate 61 through the pressure-applying member 51. The inclination angle of the pressure plate 61 determines the inclination angle of the limiting buckle plate 72, that is, determines the opening size of the C-fold structure. The second adjusting member 64 can constrain the extreme position of the swing end of the pressure plate 61 to achieve the inclination adjustment of the pressure plate 61. The second adjusting members 64 of the three side frames rise and fall synchronously to ensure that the openings of the three-side C-fold structures of the entire frame structure are consistent.

[0040] The first adjusting member 63 and the second adjusting member 64 cooperate with each other to achieve the combined molding requirements of various frame thicknesses and various C-fold structure opening sizes. The first adjusting member 63 and the second adjusting member 64 can both be driven by a piston structure, and a hydraulic cavity is correspondingly provided on the upper die, and a piston structure is movably provided in the hydraulic cavity. The first adjusting member 63 and the second adjusting member 64 are installed on the top of the piston structure, and the lifting and lowering actions of the two adjusting members are coordinated and controlled by the hydraulic system, and the amount of oil entering the corresponding hydraulic cavity is controlled by the proportional valve, thereby controlling the height of the lifting and lowering adjustment. In addition, a distance measuring series sensor can be provided to sense the respective strokes of the two adjusting members, so as to feedback control the hydraulic system to adjust the corresponding proportional valve, thereby ensuring more reliable accuracy.

[0041] The side of the pressure plate 61 away from the fold of the limit buckle plate 72 is connected to the lower end of the guide plate 66 through a hinge 65, and the guide plate 66 is lifted and slid along the vertical guide groove, and the end of the guide plate 66 is connected to the corresponding groove end surface of the vertical guide groove through an elastic reset member. Among them, the hinge 65 adopts a hinge plate, and its two ends are respectively hinged to the swing end of the pressure plate 61 and the lower end of the guide plate 66, and a limiting structure is provided at the bottom side of the hinged joint between the hinge plate and the pressure plate, which is used to constrain the angle between the bottom side of the hinge plate and the bottom side of the pressure plate to not be less than 90°. When the pressure plate and the hinge plate are perpendicular to each other, the pressure plate remains horizontal, and the hinge plate and the guide plate are fitted to remain vertical, and then with the height of the first adjusting member 63 being raised and lowered, the pressure plate 61 always remains horizontal in the unpressed state, and follows the first adjusting member 63 to be raised and lowered, so that when the folding edge is preformed, the pressure plate 61 plays a supporting role for the limit buckle plate 72. When the pressure-applying member applies pressure to the limit buckle plate 72 for shaping, it drives the limit buckle plate and the pressure plate to bend downward together. The elastic force of the elastic reset member is transmitted to the swinging end of the pressure plate through the guide slide plate and the hinge plate, thereby playing a buffering role in the shaping process. Since the shaping is a very small angle bend, the buffering effect can avoid overpressure, thereby ensuring the accuracy of the shaping bending angle and the bending quality of the limit buckle plate 72.

[0042] The pressure member 51 includes a driving block 511 and a rolling assembly 512. The lower end of the driving block 511 and the upper end of the rolling assembly 512 are slidably matched through an inclined guide surface, and are used to drive the rolling assembly 512 to roll from the root crease of the limiting buckle plate 72 to the end until it is completely in contact with the pressure plate 61 when the driving block 511 moves downward. By gradually rolling from the root crease to the end, in conjunction with the buffering effect of the elastic pulling force of the swinging end of the pressure plate, it is ensured that the extremely small angle bending in the shaping process is completed by slow pressure, thereby further stretching and extending on the basis of the original arc right-angle crease. Here, the large-angle bending of the limiting buckle plate is divided into two steps: 90° pre-forming bending and extremely small angle shaping bending, which avoids the damage at the crease caused by the one-step forming of the large-angle bending. The main bending trend is completed by the one-step stamping forming of the 90° bending, and the final extremely small angle bending is completed by slow pressure, which ensures the accuracy of the bending angle.

[0043] Among them, the inclined guide surfaces of the driving block 511 and the rolling component 512 can be matched through a slider and a slide groove, wherein the slider is located on the upper side of the rolling component, and the slide groove is located on the bottom side of the driving block, and the slider is elastically connected to one end of the slide groove. In the initial state, the slider is located at the lower end of the slide groove. As the driving block moves downward, the slider slides along the slide groove, compresses the elastic part, and gradually rolls inward along the upper surface of the limiting buckle plate. The compressed elastic part can provide a reverse thrust to ensure the pressure of the rolling component while slowing down the rolling speed of the rolling component, thereby ensuring that the roller acts on the limiting buckle plate at a uniform speed during the entire downward punching process, and ensuring that the pressure applied to each position is balanced, and finally gradually pressed into place, so that the material at the crease gradually stretches and stretches, and adapts to the state after stretching, to avoid rebound errors.

[0044] The shaping mold 6 also includes a forming die 67 corresponding to the limiting clip 73, and the folding shaping mold 5 also includes a forming convex mold 52 corresponding to the limiting clip 73. The forming convex mold 52 corresponds to the forming die 67 up and down. The forming die 67 is fixedly connected to the adjacent first adjusting member 63, which can ensure that the root crease positions of the limiting clip and the limiting buckle plate are relatively fixed. The forming convex mold 52 is fixedly connected to the driving block 511, which can simultaneously complete the forming of the limiting clip and the limiting buckle plate. The buffering feedback effect of the pressure plate indirectly acts between the forming die 67 and the forming convex mold 52, thereby ensuring the forming quality of the limiting clip.

[0045] The outer vertical surface of the flanging die 3 is a trimming contour profile, and the lower end of the trimming die 2 includes a clamping portion 21 and a shearing portion 22. The clamping portion 21 is pressed together with the upper end surface of the flanging die 3 to clamp the edge of the semi-finished back plate 7, and the shearing portion 22 cooperates with the trimming contour profile to cut off the waste edge. The clamping portion is vertically elastically connected to the shearing portion, and the shearing portion is directly connected to the shearing drive device. During the downward heavy shearing process, the clamping portion first contacts the back plate, and applies pressure to cooperate with the flanging die to clamp the preset folding contour edge of the back plate. The pressing force is gradually increased by compressing the elastic member until the shearing portion punches down into place to complete the removal of the waste edge, which can ensure the quality of the trimming.

[0046] The flanging die 3 includes a fixed portion 31 and a movable portion 32. The fixed portion 31 is in contact with the side of the clamping die 1. The movable portion 32 is located on the side of the fixed portion 31 away from the clamping die 1. The movable portion 32 is arranged to move in the vertical direction corresponding to the edge of the back plate. The fixed portion 31 is used as the original reference. By setting the movable portion, the relative position of the folding contour line and the middle of the back plate can be adjusted to meet the cutting requirements for the molding of frames of different specifications.

[0047] The specific process of forming the limit clamping frame includes the following steps:

[0048] S1. Clamp the middle of the semi-finished back panel 7 with the clamping die 1, and determine the position of the contour edge of the limit clip by moving and adjusting the movable part 32 and the corresponding shearing die 2; wherein the shearing die 2 is integrally set with the fixed part corresponding to the three side frames, and the movable parts corresponding to the three side frames move separately, but the adjustment distance of the three movable parts remains consistent, which can be achieved by the coordinated control of the sensor sensing distance. Among them, adjusting the movable part 32 and the corresponding shearing die 2 is mainly to determine the contour forming position of the limit clip, and the contour of the limit buckle plate is pre-processed and formed according to the size of the pre-formed frame.

[0049] S2. The shearing die 2 is moved downward, the clamping part 21 first presses the edge of the back plate contour, and then the shearing part 22 cuts off the waste edge.

[0050] S3, reset the shearing die 2, and the middle part of the semi-finished backboard 7 is clamped by the clamping die 1 to move downward relative to the flanging die 3 until the edge of the semi-finished backboard 7 is completely fitted with the inner side of the flanging die 3 after the waste edge is trimmed, and the flanging is completed.

[0051] S4, vertically adjust the height of the first adjusting member 63 until the outer edge of the forming die 67 corresponds to the crease position at the root of the upper limit clip 73 on the edge of the semi-finished back plate 7 after the waste edge is cut, and the semi-finished back plate 7 after the flanging is driven by the clamping die 1 to move up until the outer edge of the forming die 67 is flush with the upper end surface of the flanging die 3. The crease position at the root of the limit clip 73 is determined by the position of the waste edge cut by the shearing die 2 in step S1.

[0052] S5, the folding preforming die 4 pushes the limiting buckle plate 72 to bend it to be perpendicular to the continuous straight wall 71, and pushes the limiting clip 73 to bend it to be inclined upward.

[0053] S6. Reset the folding preforming mold 4, and vertically adjust the height of the second adjusting member 64 until the inclination angle when the pressure plate 61 contacts the top of the second adjusting member 64 is consistent with the forming inclination angle of the limit buckle plate 72, and the folding shaping mold 5 moves downward, driving the rolling assembly 512 to fit the upper side of the limit buckle plate 72 and roll from the root crease position to the end until the pressure plate 61 contacts the top of the second adjusting member 64, and the forming convex mold 52 is just pressed into place relative to the forming concave mold 67, and the pressure is maintained for a period of time.

[0054] S7. Since the width of the pressure plate 61 is larger than the width of all specifications of the limit buckle plates, when unloading, the rolling assembly 512 rolls off the end of the limit buckle plate 72 and directly applies pressure on the pressure plate 61, thereby pressing the swinging end of the pressure plate to prevent the lifting of the pressure plate from affecting the limit buckle plate. The first adjusting member 63 is moved downward until the pressure plate 61 is flat, and the restraining effect of the pressure plate on the limit buckle plate is released, thereby facilitating the unloading of the back plate. At the same time, the upper die 12 rises to lift the processed back plate away from the lower support die 11, and finally the processed back plate is removed from the upper die 12, and the upper die is withdrawn through the insertion port of the formed limit card frame by lateral extraction to complete the unloading.

[0055] The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the above principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A TV back panel limit clamping frame forming device, characterized in that: It comprises a clamping die (1), a shearing die (2), a flanging die (3), a folding preforming die (4), a folding shaping die (5) and a shaping die (6), wherein the clamping die (1) is used to clamp and fix the non-folding portion in the middle of the semi-finished back plate (7), and the shearing die (2) is used to cooperate with the flanging die (3) to cut and shape the folding edge contour line of the semi-finished back plate; The flanging die (3) is used to cooperate with the clamping die (1) to form a continuous straight wall (71), and the continuous straight wall (71) is perpendicular to the edge surface of the semi-finished back plate (7); The folding preforming die (4) is used to cooperate with the shaping die (6) to complete the preforming of multiple limiting buckle plates (72) and multiple limiting clips (73) on the continuous straight wall (71), so as to form a first C-fold and a second C-fold with openings facing inwards, wherein the first C-fold is a C-fold structure with the limiting clip (73), and the second C-fold is a C-fold structure without the limiting clip (73); The folding shaping die (5) is used to cooperate with the shaping die (6) to adjust the opening size of the first C-fold and the second C-fold, and is used to cooperate with the shaping die (6) to complete the complete forming of the limiting clip (73).

2. A TV back panel limit clamping frame forming device according to claim 1, characterized in that: The flanging die (3) is fixedly arranged, and the clamping die (1) comprises a lower supporting die (11) and an upper pressing die (12). The upper pressing die (12) and the lower supporting die (11) clamp the middle part of the semi-finished back plate (7) and move downward relative to the upper end surface of the flanging die (3). When the upper pressing die (12) is pushed to the lower limit position, the edge of the semi-finished back plate (7) is clamped and limited between the adjacent vertical surfaces of the flanging die (3) and the upper pressing die (12) to form the continuous straight wall (71).

3. A TV back panel limit clamping frame forming device according to claim 2, characterized in that: The shaping die (6) is located at the edge of the upper end face of the upper pressing die (12); the folding preforming die (4) is fitted with the upper end face of the flanging die (3) and is laterally moved close to the shaping die (6); the side of the folding preforming die (4) close to the shaping die (6) is a forming surface, and the forming surface includes a right-angle surface corresponding to the limiting buckle plate (72) and an inclined surface corresponding to the limiting clip (73); the folding preforming die (4) pushes the limiting buckle plate (72) and the limiting clip (73) to contact the shaping die (6) to form their respective root creases.

4. A device for forming a frame of a TV back panel with limited clamping connection according to claim 3, characterized in that: The shaping mold (6) includes a pressure plate (61) corresponding to the limiting buckle plate (72), and the folding shaping mold (5) includes a pressure piece (51) corresponding to the limiting buckle plate (72). The side of the pressure plate (61) close to the fold of the limiting buckle plate (72) is hinged to the upper end of the first adjusting piece (63), and the side of the pressure plate (61) away from the fold of the limiting buckle plate (72) is provided with a second adjusting piece (64) below. The first adjusting piece (63) and the second adjusting piece (64) are both vertically raised and lowered; the pressure piece (51) presses the limiting buckle plate (72) to fit with the upper side surface of the pressure plate (61), and the bottom surface of the pressure plate (61) contacts and abuts against the upper end surface of the second adjusting piece (64).

5. A TV back panel limit clamping frame forming device according to claim 4, characterized in that: The side of the pressure plate (61) away from the fold of the limit buckle plate (72) is connected to the lower end of the guide slide plate (66) through a hinge (65), and the guide slide plate (66) rises and falls and slides along the vertical guide groove. The end of the guide slide plate (66) is connected to the corresponding groove end face of the vertical guide groove through an elastic reset member.

6. A device for forming a frame of a TV back panel with limited clamping connection according to claim 5, characterized in that: The pressure member (51) comprises a driving block (511) and a rolling assembly (512); the lower end of the driving block (511) and the upper end of the rolling assembly (512) are slidably matched via an inclined guide surface, and are used to drive the rolling assembly (512) to roll from the fold at the root of the limiting buckle plate (72) to the end until it is completely in contact with the pressure plate (61) when the driving block (511) moves downward.

7. A TV back panel limit clamping frame forming device according to claim 6, characterized in that: The shaping mold (6) further comprises a forming die (67) corresponding to the limiting clip (73), and the folding shaping mold (5) further comprises a forming convex mold (52) corresponding to the limiting clip (73), the forming convex mold (52) and the forming die (67) corresponding to each other in upper and lower parts, the forming die (67) is fixedly connected to the adjacent first adjusting member (63), and the forming convex mold (52) is fixedly connected to the driving block (511).

8. A device for forming a frame of a TV back panel with limited clamping connection according to claim 7, characterized in that: The outer vertical surface of the flanging die (3) is a trimming contour surface, and the lower end of the shearing die (2) includes a clamping portion (21) and a shearing portion (22). The clamping portion (21) and the upper end surface of the flanging die (3) are pressed together to clamp the edge of the semi-finished back panel (7), and the shearing portion (22) cooperates with the trimming contour surface to cut off the waste edge.

9. A device for forming a frame of a television back panel with limited clamping connection according to claim 8, characterized in that: The flanging die (3) comprises a fixed part (31) and a movable part (32), wherein the fixed part (31) is in contact with the side of the clamping die (1), and the movable part (32) is located on a side of the fixed part (31) away from the clamping die (1), and the movable part (32) is arranged to move in a vertical direction corresponding to the edge of the back plate.

10. A TV back panel limit clamping frame forming device and forming method thereof according to claims 1-9, characterized in that: The following steps are involved: S1, clamping and fixing the middle part of the semi-finished back plate (7) by a clamping die (1), and determining the contour edge position of the limit clip (73) by moving and adjusting the movable part (32) and the corresponding shearing die (2); S2, the shearing die (2) is moved downward, the clamping part (21) first presses the contour edge of the back plate, and then the shearing part (22) cuts off the waste edge; S3, resetting the shearing die (2), and driving the middle part of the semi-finished back plate (7) to move downward relative to the flanging die (3) by clamping the pressing die (1), until the edge of the semi-finished back plate (7) is completely fitted with the inner side of the flanging die (3) after the waste edge is cut off, and the flanging is completed; S4, vertically adjusting the height of the first adjusting member (63) until the outer edge of the forming die (67) corresponds to the crease at the root of the upper limit clip (73) on the edge of the semi-finished back plate (7) after the waste edge is trimmed, and the semi-finished back plate (7) is moved upward by the pressing and clamping die (1) after flanging until the outer edge of the forming die (67) is flush with the upper end surface of the flanging die (3); S5, the folding preforming die (4) pushes the limiting buckle plate (72) to bend it to be perpendicular to the continuous straight wall (71), and pushes the limiting clip (73) to bend it to be inclined upward; S6, reset the folding preforming die (4), vertically adjust the height of the second adjusting member (64), until the inclination angle when the pressure plate (61) contacts the top of the second adjusting member (64) is consistent with the forming inclination angle of the limit buckle plate (72), and the folding shaping die (5) moves downward, driving the rolling assembly (512) to fit the upper side of the limit buckle plate (72) and roll from the root fold position to the end until the pressure plate (61) contacts the top of the second adjusting member (64), and the forming convex die (52) is just pressed into place relative to the forming concave die (67), and the pressure is maintained for a period of time; S7, the rolling assembly (512) rolls off the end of the limit buckle plate (72), directly applies pressure on the pressure plate (61), and moves the first adjustment member (63) downward until the pressure plate (61) is flat, while the upper die (12) rises to lift the processed back plate away from the lower support die (11), and finally removes the processed back plate from the upper die (12).

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