Automatic blanking device for aviation metal support

Abstract

The invention discloses an automatic blanking device for aviation metal supports, and belongs to the technical field of metal support machining. The device comprises a blanking die, the blanking die comprises an upper die mechanism and a lower die mechanism, the upper die mechanism comprises an upper die base, an upper die plate, a male die, a small hole punching needle and a large hole punching needle, the male die is provided with a first arc-shaped groove and a second arc-shaped groove, and the lower die mechanism comprises a lower die base, a lower die plate, a female die, a small punching hole and a large punching hole; a strip channel is arranged on the lower die plate, the width of the metal strip is the same as that of the metal support, the lower die mechanism further comprises a fixed-length check block acting on the front end of the metal strip, and the fixed-length check block is arranged on the lower die plate or the lower die base through a check block fixing base. The metal support blanking die is simple in structure and convenient to operate, blanking of metal supports of various specifications can be achieved through one set of die, the die cost is reduced, the tedious process of die replacement is avoided, the blanking efficiency of the metal supports is improved, metal strips are adopted for blanking, the material utilization rate is high, and the machining cost of the metal supports is reduced.

Description

Technical Field

[0001] The present invention relates to an automatic blanking device for aviation metal brackets, belonging to the technical field of metal bracket processing. Background Art

[0002] In the aviation field, electronic systems, engines, etc. involve many circuits. Currently, metal brackets are mostly used to fix and support the circuits. The metal brackets are provided with bracket mounting holes for positioning and installing the metal brackets and seat mounting holes for positioning the cable seats of the circuits. The two ends of the metal brackets are respectively arc structures; in order to meet different installation spaces, the metal brackets will have different shapes and specifications, mainly three shapes. One is an I-shaped flat structure; the second is an L-shaped structure; the third is a Z-shaped structure similar to two 90-degree bends.

[0003] The existing processing method of metal brackets is to use a punching machine for blanking. First, a flat metal bracket of appropriate size is punched out from a sheet metal, that is, the blanking of the metal bracket is obtained to get a flat metal bracket, and then a bending die is used to bend the flat metal bracket to form a metal bracket of the required shape. For the blanking of the metal bracket, the whole metal sheet is placed on the punching machine, and then a blanking die corresponding to the specification of the metal bracket is selected for punching and blanking. This punching and blanking method, on the one hand, in order to ensure the product quality of the metal bracket blanking, generally does not punch close to the edge, and there will be surplus materials at the punching edge. Coupled with the small size of the metal bracket itself, there are more surplus materials at the edge, resulting in serious waste and low utilization rate of the metal sheet; on the other hand, when punching the whole metal sheet, the blanking die has poor versatility. Although the widths of different specifications of metal brackets are the same, the lengths are different, with up to more than 60 specifications. A set of blanking dies must be made for each specification of metal bracket in order to punch out a flat metal bracket that meets the requirements, which will result in a large number of required blanking dies, high processing cost of the metal bracket, and it is not easy to store and manage the blanking dies; when blanking different specifications of metal brackets, the corresponding blanking dies need to be replaced, which affects the blanking efficiency of the metal bracket. Summary of the Invention

[0004] The present invention aims at the deficiencies of the existing technology and provides an automatic blanking device for aviation metal brackets.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: An automatic blanking device for an aviation metal bracket, including a blanking die, the blanking die includes an upper die mechanism and a lower die mechanism, the upper die mechanism includes an upper die base, an upper template provided on the upper die base, a punch, a small hole punch needle and a large hole punch needle provided on the upper template, the punch is provided with a first arc groove for punching the front end of the metal bracket and a second arc groove for punching the rear end of the metal bracket, the lower die mechanism includes a lower die base, a lower template provided on the lower die base, a die cavity provided on the lower template, a small punch hole and a large punch hole, the die hole of the die cavity is adapted to the punch, the small punch hole is adapted to the small hole punch needle, and the large punch hole is adapted to the large hole punch needle; The lower template is provided with a strip channel for the metal strip to pass through, the width of the metal strip is the same as the width of the metal bracket, the lower die mechanism further includes a fixed-length stop block acting on the front end of the metal strip, and the fixed-length stop block is arranged on the lower template or the lower die base through a stop block fixing seat.

[0006] The beneficial effects of the present invention are as follows: A metal strip with the same width as the metal bracket is used. Through the cooperation of the die cavity and the punch, as well as the punch needle and the punch hole, the shape of the rear end of the previous flat metal bracket and the shape of the front end of the next flat metal bracket can be stamped out. Punching and end forming can be completed in one stamping, and blanking of one metal bracket can be completed in two stampings. Considering the numerous models of metal brackets, different specifications of metal brackets can be blanked by replacing fixed-length stop blocks of different lengths. The existence of the fixed-length stop block can, on the one hand, select fixed-length stop blocks of different lengths to facilitate blanking of the corresponding flat metal brackets after stamping to meet the length requirements of the corresponding metal brackets; on the other hand, the fixed-length stop block also ensures that the length of the metal strip cut each time is consistent, thus ensuring the consistency and accuracy of the metal brackets. Only one set of blanking die is needed, and different specifications of flat metal brackets can be blanked by replacing different fixed-length stop blocks, avoiding the process of frequently disassembling and replacing the die when processing metal bracket products of different specifications, and there is no need for multiple dies, saving the die manufacturing cost. The structure of the present invention is simple and the operation is convenient. One set of die can blank metal brackets of multiple specifications, reducing the die cost, avoiding the cumbersome process of replacing the die, improving the blanking efficiency of the metal brackets, using metal strip for blanking, with high material utilization rate and reducing the processing cost of the metal brackets.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Further, it further includes a feeding mechanism for automatically transporting the metal strip to the blanking die. The feeding mechanism includes a feeding rack, a lower feeding roller, an upper feeding roller, a feeding lifting cylinder, and a feeding driving mechanism for driving the lower feeding roller and the upper feeding roller to rotate. The lower feeding roller is rotatably arranged on the feeding rack, the upper feeding roller is rotatably arranged on a feeding lifting slide plate, and the feeding lifting slide plate is connected to the feeding rack through the feeding lifting cylinder.

[0009] The beneficial effect of adopting the above further solution is that the metal strip can be blanked through the blanking die to obtain a flat metal bracket that meets the requirements. For the supply of the metal strip, manual feeding can be adopted, and of course, automatic feeding can also be adopted. In comparison, using the feeding mechanism for automatic feeding not only enables the metal strip to be stably and continuously fed into the blanking die, improves the blanking efficiency of the metal bracket and the consistency of the processing quality, but also can reduce the labor intensity of workers and avoid the cumbersome manual feeding and the influence of human factors.

[0010] Further, the feeding driving mechanism includes a driving gear, a driven gear, a one-way bearing, and a feeding cylinder. The driving gear is arranged on the roller shaft of the lower feeding roller, the driven gear is arranged on the roller shaft of the upper feeding roller. Under the action of the feeding lifting cylinder, the driven gear can move downward to mesh with the driving gear. One end of the feeding cylinder is hinged to the feeding rack, and the other end is connected to the outer ring of the one-way bearing through a connecting component.

[0011] The beneficial effect of adopting the above further solution is that a one-way bearing is a kind of bearing that can rotate freely in one direction and is locked in the other direction; when the piston rod of the feeding cylinder extends, the connecting component will transmit power to the one-way bearing. This direction is the positive direction of the one-way bearing, that is, the direction in which the one-way bearing can rotate. At this time, the roller shaft of the lower feeding roller remains stationary; when the piston rod of the feeding cylinder retracts, the connecting component transmits power to the one-way bearing. This direction is the reverse direction of the one-way bearing, that is, the direction in which the one-way bearing cannot rotate. The inner ring of the one-way bearing is key-connected to the lower feeding roller, and the roller shaft of the lower feeding roller rotates clockwise around its own axis. Under the meshing action of the driven gear and the driving gear, the upper feeding roller rotates counterclockwise. The upper feeding roller and the lower feeding roller rely on friction to feed the clamped metal strip forward. Repeating the above process can realize the continuous feeding of the metal strip.

[0012] Further, the connecting component includes a bearing sleeve and a bearing end cover. The bearing sleeve is key-connected to the outer ring of the one-way bearing. One end of the bearing end cover is connected to the bearing sleeve, and the other end is hinged to the feeding cylinder.

[0013] The beneficial effect of adopting the above further solution is that the connection component realizes the connection between the feeding cylinder and the one-way bearing, and can transmit power to realize the feeding of the metal strip.

[0014] Further, a pair of guide plates are also provided on the feeding rack, and a guide channel for guiding the metal strip is formed between the pair of guide plates.

[0015] The beneficial effect of adopting the above further solution is that the distance between the pair of guide plates is slightly larger than the width of the metal strip, and the function of the guide channel is to prevent the metal strip from running off during the feeding process.

[0016] Further, a straightening mechanism for straightening the metal strip is also included.

[0017] The beneficial effect of adopting the above further solution is that the straightening mechanism can straighten the metal strip, and the straightened metal strip can enter the feeding mechanism and the blanking die more smoothly, ensuring the shape quality of the metal bracket obtained by blanking.

[0018] Further, the straightening mechanism includes a straightening frame, a plurality of straightening lower rollers, a plurality of straightening upper rollers, and a straightening lifting cylinder for driving the straightening upper rollers to move up and down. The straightening lower rollers are rotatably arranged on the straightening frame, the straightening upper rollers are rotatably arranged on a straightening mounting plate, and the straightening mounting plate is connected to the straightening frame through the straightening lifting cylinder.

[0019] The beneficial effect of adopting the above further solution is that the straightening mounting plate can carry the straightening upper rollers to move up and down under the action of the straightening lifting cylinder. When it is necessary to straighten the metal strip, the straightening lifting cylinder acts, and the straightening mounting plate moves downward, so that the gap between the straightening upper rollers and the straightening lower rollers of the straightening mechanism can match the thickness of the metal strip, realizing the straightening of the metal strip. When the blanking of the metal strip is completed, the straightening lifting cylinder acts, and the straightening mounting plate moves upward to wait for the feeding of the next metal strip.

[0020] Further, the straightening mechanism also includes a pair of straightening guide rollers, and the straightening guide rollers are arranged at the entrance of the straightening mechanism with adjustable positions, and the distance between the pair of straightening guide rollers is adapted to the width of the metal strip.

[0021] The beneficial effect of adopting the above further solution is that the straightening guide rollers can act on the left and right side faces of the metal strip to guide and limit the position of the metal strip entering the straightening mechanism. The straightening guide rollers are arranged at the entrance position of the straightening mechanism, and the straightening guide rollers can be adjusted left and right on the straightening frame to select a suitable position and the distance between the pair of straightening guide rollers, which is convenient for the entry of the metal strip.

[0022] Further, a left stop block and a right stop block are provided on the lower template, and a strip channel is formed among the left stop block, the right stop block and the lower template.

[0023] The beneficial effect of adopting the above further scheme is that the metal strip can pass through the strip channel formed among the left stop block, the right stop block and the lower template. The strip channel can guide and limit the metal strip to be processed, ensuring smooth movement of the metal strip.

[0024] Further, a guiding mechanism for guiding the metal strip is further provided between the feeding mechanism and the blanking die. The guiding mechanism includes a guiding frame, and a plurality of upper guide rollers and lower guide rollers arranged on the guiding frame.

[0025] The beneficial effect of adopting the above further scheme is that the blanking die is installed on a punching press. Limited by the punching press equipment, the installation position of the feeding mechanism cannot be too close to the punching press. Therefore, there will be a large gap between the feeding mechanism and the blanking die. The guiding mechanism can be arranged at the gap position between the feeding mechanism and the blanking die, enabling the metal strip to pass through this gap smoothly and preventing the straightened metal strip from bending again in this gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a front view structural diagram of the blanking die of the present invention; Figure 3 is a three-dimensional structural diagram of the blanking die of the present invention at an angle one; Figure 4 is a three-dimensional structural diagram of the blanking die of the present invention at an angle two; Figure 5 is a structural diagram of the lower die mechanism of the present invention; Figure 6 is a sectional structural diagram of the blanking die of the present invention; Figure 7 is a structural diagram of the lower die mechanism of the present invention with a metal strip; Figure 8 is a front view structural diagram of the feeding mechanism of the present invention; Figure 9 is Figure 8 a sectional structural diagram taken along the A-A direction in Figure 10 is Figure 8 a sectional structural diagram taken along the B-B direction in Figure 11 is a structural diagram of the feeding mechanism of the present invention with a metal strip; Figure 12It is a schematic diagram of the main structure of the straightening mechanism of the present invention; Figure 13 for Figure 12 Schematic diagram of the cross-sectional structure along the CC direction; Figure 14 It is a structural schematic diagram of a metal strip material on the straightening mechanism of the present invention; Figure 15 It is a structural schematic diagram of the guide mechanism of the present invention; Figure 16 It is a schematic diagram of the top view of the guiding mechanism of the present invention; Figure 17 for Figure 16 Schematic diagram of the cross-sectional structure along the DD direction; Figure 18 It is a structural schematic diagram of the blanking state of the metal strip material of the present invention; Figure 19 It is a structural schematic diagram of the blanking process of the metal bracket of the present invention; Figure 20 This is a schematic structural diagram of a flat metal bracket obtained by cutting materials in the present invention; In the figure, 100, blanking die; 101, upper die seat; 102, upper die plate; 103, punch; 104, small hole punch; 105, large hole punch; 106, lower die seat; 107, lower die plate; 108, die; 109, small punch; 110, large punch; 111, fixed length block; 112, block fixing seat; 113, left block; 114, right block; 115, unloading plate; 116, spring; 117, unloading guide pin; 118, upper die guide pin; 119, upper die guide sleeve; 120, die handle; 121, upper pad; 122, lower pad; 123, top block; 124, top spring; 125, top block screw; 200, feeding mechanism; 201, feeding rack; 202, 2. Feed lower roller; 203. Feed upper roller; 204. Feed lifting cylinder; 205. Feed lifting slide plate; 206. Driving gear; 207. Driven gear; 208. Feed cylinder; 209. One-way bearing; 210. Bearing sleeve; 211. Bearing end cover; 212. Guide plate; 300. Straightening mechanism; 301. Straightening frame; 302. Straightening lower roller; 303. Straightening upper roller; 304. Straightening lifting cylinder; 305. Straightening mounting plate; 306. Straightening guide roller; 307. Guide shaft mounting plate; 308. Adjusting long hole; 400. Guide mechanism; 401. Guide frame; 402. Upper guide roller; 403. Lower guide roller; 404. Hinge; 500. Metal strip. DETAILED DESCRIPTION

[0027] The principles and features of the present invention are described below in conjunction with examples. The examples are only used to explain the present invention and are not used to limit the scope of the present invention.

[0028] As shown in Figures 1 - 20 Figure 1, an automatic blanking device for an aviation metal bracket includes a blanking die 100. The blanking die 100 includes an upper die mechanism and a lower die mechanism. The upper die mechanism includes an upper die base 101, an upper template 102 provided on the upper die base 101, a punch 103, a small hole punch needle 104, and a large hole punch needle 105 provided on the upper template 102. The punch 103 is provided with a first arc groove for punching the front end of the metal bracket and a second arc groove for punching the rear end of the metal bracket. The lower die mechanism includes a lower die base 106, a lower template 107 provided on the lower die base 106, a die 108, a small punching hole 109, and a large punching hole 110 provided on the lower template 107. The die hole of the die 108 is adapted to the punch 103, the small punching hole 109 is adapted to the small hole punch needle 104, and the large punching hole 110 is adapted to the large hole punch needle 105; A strip material channel for the metal strip 500 to pass through is provided on the lower template 107. The width of the metal strip 500 is the same as the width of the metal bracket. The lower die mechanism further includes a fixed-length stop block 111 acting on the front end of the metal strip 500. The fixed-length stop block 111 is arranged on the lower template 107 or the lower die base 106 through a stop block fixing seat 112.

[0029] It further includes a feeding mechanism 200 for automatically transporting the metal strip 500 to the blanking die 100. The feeding mechanism 200 includes a feeding frame 201, a feeding lower roller 202, a feeding upper roller 203, a feeding lifting cylinder 204, and a feeding driving mechanism for driving the feeding lower roller 202 and the feeding upper roller 203 to rotate. The feeding lower roller 202 is rotatably arranged on the feeding frame 201, the feeding upper roller 203 is rotatably arranged on a feeding lifting slide plate 205, and the feeding lifting slide plate 205 is connected to the feeding frame 201 through the feeding lifting cylinder 204. The metal strip 500 can be blanked through the blanking die 100 to obtain a flat metal bracket that meets the requirements. For the supply of the metal strip 500, manual feeding can be adopted, and of course, automatic feeding can also be adopted. In comparison, automatic feeding using the feeding mechanism 200 not only enables the metal strip 500 to be stably and continuously fed into the blanking die 100, improves the blanking efficiency of the metal bracket and the consistency of the processing quality, but also reduces the labor intensity of workers and avoids the cumbersome manual feeding and the influence of human factors.

[0030] The feeding drive mechanism includes a driving gear 206, a driven gear 207, a one-way bearing 209 and a feeding cylinder 208. The driving gear 206 is arranged on the roller shaft of the lower feeding roller 202, and the driven gear 207 is arranged on the roller shaft of the upper feeding roller 203. Under the action of the feeding lifting cylinder 204, the driven gear 207 can move downward to mesh with the driving gear 206. One end of the feeding cylinder 208 is hinged to the feeding frame 201, and the other end is connected to the outer ring of the one-way bearing 209 through a connecting component. A one-way bearing 209 is a kind of bearing that can rotate freely in one direction and is locked in the other direction; when the piston rod of the feeding cylinder 208 extends, the connecting component will transmit power to the one-way bearing 209. This direction is the positive direction of the one-way bearing 209, that is, the direction in which the one-way bearing 209 can rotate. At this time, the roller shaft of the lower feeding roller 202 remains stationary; when the piston rod of the feeding cylinder 208 retracts, the connecting component transmits power to the one-way bearing 209. This direction is the reverse direction of the one-way bearing 209, that is, the direction in which the one-way bearing 209 cannot rotate. The inner ring of the one-way bearing 209 is key-connected to the lower feeding roller 202, and the roller shaft of the lower feeding roller 202 rotates clockwise around its own axis. Under the meshing action of the driven gear 207 and the driving gear 206, the upper feeding roller 203 rotates counterclockwise. The upper feeding roller 203 and the lower feeding roller 202 feed the clamped metal strip 500 forward by means of friction. Repeating the above process can realize the continuous feeding of the metal strip 500.

[0031] The roller shaft of the lower feeding roller 202 is the driving shaft. The driving gear 206 and the driven gear 207 have the same size, and the transmission ratio is 1:1, ensuring that the rotation speeds of the upper feeding roller 203 and the lower feeding roller 202 are the same to obtain a better feeding effect.

[0032] The connecting component includes a bearing sleeve 210 and a bearing end cover 211. The bearing sleeve 210 is key-connected to the outer ring of the one-way bearing 209. One end of the bearing end cover 211 is connected to the bearing sleeve 210, and the other end is hinged to the feeding cylinder 208. Through this connecting component, the connection between the feeding cylinder 208 and the one-way bearing 209 is realized, and power can be transmitted to feed the metal strip 500.

[0033] For the blanking of metal brackets of different specifications, the telescopic length of the piston rod of the feeding cylinder 208 can also be controlled to realize different rotation angles of the upper feeding roller 203 and the lower feeding roller 202, so as to control the feeding length.

[0034] A pair of guide plates 212 are further provided on the material feeding rack 201. A guide channel for guiding the metal strip 500 is formed between the pair of guide plates 212. The distance between the pair of guide plates 212 is slightly larger than the width of the metal strip 500. The function of the guide channel is to prevent the metal strip 500 from running off track during the material feeding process.

[0035] It further includes a straightening mechanism 300 for straightening the metal strip 500. The straightening mechanism 300 can straighten the cut metal strip 500. The straightened metal strip 500 can enter the blanking die 100 more smoothly, ensuring the external shape quality of the metal bracket obtained by blanking.

[0036] The straightening mechanism 300 includes a straightening frame 301, a plurality of straightening lower rollers 302, a plurality of straightening upper rollers 303, and a straightening lifting cylinder 304 for driving the lifting movement of the straightening upper rollers 303. The straightening lower rollers 302 are rotatably arranged on the straightening frame 301. The straightening upper rollers 303 are rotatably arranged on a straightening mounting plate 305. The straightening mounting plate 305 is connected to the straightening frame 301 through the straightening lifting cylinder 304. The straightening mounting plate 305 can carry the straightening upper rollers 303 to move up and down under the action of the straightening lifting cylinder 304. When it is necessary to straighten the metal strip 500, the straightening lifting cylinder 304 acts, and the straightening mounting plate 305 moves downward, so that the gap between the straightening upper rollers 303 and the straightening lower rollers 302 of the straightening mechanism 300 can match the thickness of the metal strip 500, realizing the straightening of the metal strip 500. When the blanking of the metal strip 500 is completed, the straightening lifting cylinder 304 acts, and the straightening mounting plate 305 moves upward, waiting for the feeding of the next metal strip 500.

[0037] The straightening mechanism 300 further includes a pair of straightening guide rollers 306. The straightening guide rollers 306 are arranged at the entrance of the straightening mechanism 300 with adjustable positions. The distance between the pair of straightening guide rollers 306 is adapted to the width of the metal strip 500. The straightening guide rollers 306 can act on the left and right side faces of the metal strip 500 to guide and limit the position of the metal strip 500 entering the straightening mechanism 300. The straightening guide rollers 306 are arranged at the entrance position of the straightening mechanism 300. The straightening guide rollers 306 can be adjusted left and right on the straightening frame 301 to select a suitable position and the distance between the pair of straightening guide rollers 306, facilitating the entry of the metal strip 500.

[0038] The upper and lower parts of the straightening frame 301 are respectively provided with guide shaft mounting plates 307, and the guide shaft mounting plates 307 are provided with adjusting long holes 308 for the left and right movement of the straightening guide rollers 306. The straightening guide rollers 306 include a fixed shaft and a shaft cylinder. Threads are provided at both ends of the fixed shaft. The shaft cylinder is sleeved on the fixed shaft, and the straightening guide rollers 306 are fixed on the guide shaft mounting plates 307 through nuts. The straightening guide rollers 306 can move left and right on the guide shaft mounting plates 307, and appropriate positions and spacings can be selected according to actual needs to facilitate the entry of the metal strip 500.

[0039] The lower template 107 is provided with a left stop block 113 and a right stop block 114, and a strip channel is formed between the left stop block 113, the right stop block 114 and the lower template 107. Grooves are respectively provided at the bottoms of the left stop block 113 and the right stop block 114. The metal strip 500 can pass through the strip channel formed between the left stop block 113, the right stop block 114 and the lower template 107. The strip channel can guide and limit the metal strip 500 to be processed, ensuring smooth movement of the metal strip 500.

[0040] A guiding mechanism 400 for guiding the metal strip 500 is further provided between the feeding mechanism 200 and the blanking die 100. The guiding mechanism 400 includes a guiding frame 401, and a plurality of upper guide rollers 402 and lower guide rollers 403 arranged on the guiding frame 401. The blanking die 100 is installed on a punching press for use. Due to the limitation of the punching press equipment, the installation position of the feeding mechanism 200 cannot be too close to the punching press. Therefore, there will be a large gap between the feeding mechanism 200 and the blanking die 100. The guiding mechanism 400 can be arranged at the gap position between the feeding mechanism 200 and the blanking die 100, so that the metal strip 500 can smoothly pass through this gap, and at the same time, it can prevent the straightened metal strip 500 from bending again in this gap. The upper guide rollers 402 and the lower guide rollers 403 are respectively rotatably arranged on the guiding frame 401. The distance between the upper guide rollers 402 and the lower guide rollers 403 is slightly greater than the maximum thickness of the metal strip 500 of the processed metal bracket to ensure the versatility of the guiding mechanism 400.

[0041] The guiding frame 401 includes a lower frame body and an upper frame body arranged on the lower frame body. The upper frame body can be set into two parts and is connected by a hinge 404. When the metal strip 500 is processed to be too short, at this time, the feeding mechanism 200 is not sufficient to complete the feeding. The upper frame body of the guiding mechanism 400 can be opened along the hinge 404, and manual feeding can be adopted, that is, manually grasping the metal strip 500 to continue feeding until the last metal strip 500 cannot complete the blanking of a metal bracket.

[0042] The upper die mechanism further includes a stripper plate 115, which is connected to the upper template 102 through a spring 116. A stripper guide post 117 for guiding the stripper plate 115 is provided on the upper template 102. An upper die guide post 118 is provided on the lower die base 106, and an upper die guide sleeve 119 adapted to the upper die guide post 118 is further provided on the upper die base 101.

[0043] A die shank 120 for connecting to a punching press is provided on the upper die base 101. The upper template 102 is connected to the upper die base 101 through an upper backing plate 121, and the lower template 107 is connected to the lower die base 106 through a lower backing plate 122.

[0044] The lower die mechanism further includes a knockout block 123, a knockout spring 124 and a knockout block screw 125. A knockout block moving groove for accommodating the knockout block 123 is provided on the lower template 107. An installation hole for installing the knockout block screw 125 is provided on the lower die base 106. The knockout spring 124 is arranged between the knockout block 123 and the knockout block screw 125. The knockout block 123 can jack up the metal strip 500 under the action of the knockout spring 124. By adjusting the depth of the knockout block screw 125 screwed into the lower die base 106, the elastic force of the knockout spring 124 can be controlled. The function of the knockout block 123 is to jack up the metal strip 500 to prevent burrs at the cut after stamping from adhering to the female die 108 and affecting the feeding of the metal strip 500. The knockout block 123 can move up and down in the knockout block moving groove on the lower template 107. In the non-working state, the knockout block 123 is at the highest position. When punching, the upper die mechanism presses the metal strip 500, and at the same time, the knockout block 123 is pressed down. After the upper die mechanism rises, the knockout block 123 jacks up the metal strip 500 under the action of the knockout spring 124, facilitating the smooth feeding of the metal strip 500.

[0045] A lifting slide rail for guiding the up and down movement of the feeding lifting slide plate 205 is further provided on the feeding rack 201. A straightening slide rail for guiding the up and down movement of the straightening mounting plate 305 is provided on the straightening rack 301.

[0046] Place a metal strip 500 with the same width as the metal bracket product in this automatic blanking device for aviation metal brackets. The length of the metal strip 500 is relatively long and it is prone to bending. The straightening mounting plate 305 of the straightening mechanism 300 moves downward with the straightening lifting cylinder 304 to carry the straightening upper roller 303. The distance between the straightening upper roller 303 and the straightening lower roller 302 is adapted to the thickness of the metal strip 500 to straighten the metal strip 500. The function of the feeding mechanism 200 is to convey the metal strip 500, that is, to feed the metal strip 500 into the blanking die 100 for blanking. Under the action of the feeding lifting cylinder 204 of the feeding mechanism 200, the feeding lifting slide plate 205 moves downward with the feeding upper roller 203, so that the feeding upper roller 203 and the feeding lower roller 202 clamp the metal strip 500. The piston rod of the feeding cylinder 208 extends, the one-way bearing 209 rotates, the feeding lower roller 202 is stationary, the piston rod of the feeding cylinder 208 retracts, the one-way bearing 209 is stationary, the feeding lower roller 202 rotates clockwise, the driven gear 207 meshes with the driving gear 206 for transmission, the feeding upper roller 203 rotates counterclockwise, and the feeding upper roller 203 and the feeding lower roller 202 clamp the metal strip 500 by friction to realize feeding. The metal strip 500 enters the blanking die 100 through the guiding mechanism 400. The metal strip 500 passes through the middle of the left stop block 113 and the right stop block 114. The front end of the metal strip 500 contacts the fixed-length stop block 111, and the metal strip 500 is fed in place. The control system such as PLC controls the feeding mechanism 200 to stop feeding, and the blanking die 100 acts. Under the action of the punch 103, punching and forming can be completed in one stamping. See Figure 19 Figure a in Figure 19 After that, the blanking die 100 resets, and the first stamping part can be taken out manually or by a manipulator. The control system controls the feeding mechanism 200 to continue feeding. The front end of the metal strip 500 contacts the fixed-length stop block 111. See Figure 19 Figure b in Figure 20A flat metal bracket obtained by blanking is presented. Repeating the above process can complete the blanking of subsequent metal brackets. When changing the specifications of the metal bracket, only the corresponding fixed-length stop block 111 needs to be replaced. After obtaining the flat metal bracket through the automatic blanking device, the flat metal bracket can then be bent by a bending die to obtain a metal bracket with the required shape. This automatic blanking device for aviation metal brackets only requires a set of blanking dies 100. By replacing the fixed-length stop blocks 111 with different lengths, the blanking of metal brackets with different specifications and models can be achieved. Using a metal strip 500 with the same width as the metal bracket results in less material waste, high utilization rate, reduced costs, realizes automatic blanking, has high blanking efficiency, saves the labor cost of feeding, and the quality of the obtained flat metal brackets is highly consistent.

[0047] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automatic blanking device for an aviation metal bracket, including a blanking die (100), characterized in that, The blanking die (100) includes an upper die mechanism and a lower die mechanism. The upper die mechanism includes an upper die base (101), an upper template (102) disposed on the upper die base (101), a punch (103), a small-hole punch pin (104), and a large-hole punch pin (105) disposed on the upper template (102). The punch (103) is provided with a first arc groove for punching the front end of the metal bracket and a second arc groove for punching the rear end of the metal bracket. The lower die mechanism includes a lower die base (106), a lower template (107) disposed on the lower die base (106), a die (108), a small punching hole (109), and a large punching hole (110) disposed on the lower template (107). The die hole of the die (108) is adapted to the punch (103), the small punching hole (109) is adapted to the small-hole punch pin (104), and the large punching hole (110) is adapted to the large-hole punch pin (105). The lower template (107) is provided with a strip channel for the metal strip (500) to pass through. The width of the metal strip (500) is the same as the width of the metal bracket. The lower die mechanism further includes a fixed-length stop block (111) acting on the front end of the metal strip (500). The fixed-length stop block (111) is disposed on the lower template (107) or the lower die base (106) through a stop block fixing seat (112).

2. The automatic blanking device for the aviation metal bracket according to claim 1, characterized in that, It further includes a feeding mechanism (200) for automatically transporting the metal strip (500) to the blanking die (100). The feeding mechanism (200) includes a feeding frame (201), a lower feeding roller (202), an upper feeding roller (203), a feeding lifting cylinder (204), and a feeding driving mechanism for driving the lower feeding roller (202) and the upper feeding roller (203) to rotate. The lower feeding roller (202) is rotatably disposed on the feeding frame (201). The upper feeding roller (203) is rotatably disposed on a feeding lifting slide plate (205). The feeding lifting slide plate (205) is connected to the feeding frame (201) through the feeding lifting cylinder (204).

3. The automatic blanking device for the aviation metal bracket according to claim 2, wherein, The feeding driving mechanism includes a driving gear (206), a driven gear (207), a one-way bearing (209), and a feeding cylinder (208). The driving gear (206) is disposed on the roller shaft of the lower feeding roller (202). The driven gear (207) is disposed on the roller shaft of the upper feeding roller (203). Under the action of the feeding lifting cylinder (204), the driven gear (207) can move downward to engage with the driving gear (206). One end of the feeding cylinder (208) is hinged to the feeding frame (201), and the other end is connected to the outer ring of the one-way bearing (209) through a connecting component.

4. The automatic blanking device for the aviation metal bracket according to claim 3, wherein, The connecting component includes a bearing sleeve (210) and a bearing end cover (211). The bearing sleeve (210) is key-connected to the outer ring of the one-way bearing (209). One end of the bearing end cover (211) is connected to the bearing sleeve (210), and the other end is hinged to the feeding cylinder (208).

5. The automatic blanking device for the aviation metal bracket according to claim 2, characterized in that, A pair of guide plates (212) are further provided on the feeding rack (201), and a guide channel for guiding the metal strip (500) is formed between the pair of guide plates (212).

6. The automatic blanking device for the aviation metal bracket according to any one of claims 2-5, characterized in that, It further includes a straightening mechanism (300) for straightening the metal strip (500).

7. The automatic blanking device for the aviation metal bracket according to claim 6, characterized in that, The straightening mechanism (300) includes a straightening frame (301), a plurality of straightening lower rollers (302), a plurality of straightening upper rollers (303), and a straightening lifting cylinder (304) for driving the lifting movement of the straightening upper rollers (303). The straightening lower rollers (302) are rotatably arranged on the straightening frame (301), the straightening upper rollers (303) are rotatably arranged on a straightening mounting plate (305), and the straightening mounting plate (305) is connected to the straightening frame (301) through the straightening lifting cylinder (304).

8. The automatic blanking device for the aviation metal bracket according to claim 6, characterized in that The straightening mechanism (300) further includes a pair of straightening guide rollers (306), and the straightening guide rollers (306) are arranged at the entrance of the straightening mechanism (300) with adjustable positions. The distance between the pair of straightening guide rollers (306) is adapted to the width of the metal strip (500).

9. The automatic blanking device for the aviation metal bracket according to any one of claims 1-5, characterized in that A left stop block (113) and a right stop block (114) are provided on the lower template (107), and a strip channel is formed among the left stop block (113), the right stop block (114), and the lower template (107).

10. The automatic blanking device for the aviation metal bracket according to any one of claims 2-5, characterized in that, A guiding mechanism (400) for guiding the metal strip (500) is further provided between the feeding mechanism (200) and the blanking die (100). The guiding mechanism (400) includes a guiding frame (401), a plurality of upper guide rollers (402) and lower guide rollers (403) arranged on the guiding frame (401).

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