Lower die holder and die device for stamping of stackable junction box

Abstract

The utility model discloses a lower die holder for stamping a stackable junction box and a die device. The lower die holder comprises a base and a bottom plate arranged on the base, a first punching and trimming station, a bottom hole punching station, an inner side notching station, a first reinforcing rib punching station, a bottom hole tapping station, a junction box knock-off hole punching station and a junction box folding station which are used for machining the stackable junction box are arranged on the bottom plate; the two second punching and trimming stations, the two second reinforcing rib stamping stations and the two trimming and bending stations are used for machining pipe clamps; the third punching and trimming station and the reinforcing rib and knock-off hole punching station are used for machining the partition plate. The two second punching and trimming stations, the two second reinforcing rib punching stations and the two trimming and bending stations are symmetrically arranged on the two sides of the bottom plate in the width direction of the bottom plate in a one-to-one correspondence mode. The third punching and trimming station and the reinforcing rib and knock-off hole punching station are located in the middle of the bottom plate. According to the utility model, production line efficiency can be improved and production cost can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of junction box production, in particular to a lower die base and a die device for stamping a stackable junction box. Background Art

[0002] Junction boxes are a kind of electrical auxiliary material commonly used in decoration. They can protect and connect wires. Due to the complex and diverse environments for installing junction boxes, different types of junction boxes are also required to meet the limitations of installation conditions. Compared with the junction boxes with one-sided opening for panel installation, which is more common in daily life, the junction boxes with double-sided openings can be stacked and used in combination, breaking through the limitations of conventional single-sided opening junction boxes in the depth direction. Due to the special structure of the stackable junction box, its processing mold is also different from the processing mold of the conventional junction box. For the stamping mold of the stackable junction box, especially the design of the lower mold, in addition to meeting the basic requirements for processing the shape and structure of each part of the junction box, it is also necessary to consider production efficiency, production cost and other factors. Utility Model Content

[0003] The utility model is developed to solve the above-mentioned problem, and aims to provide a lower die base and a die device for stamping a stackable junction box, which are helpful to improve production line efficiency and reduce production costs.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A lower die base for stamping a stackable junction box, comprising:

[0006] A base with a material dropping space at the bottom and a bottom plate arranged on the base;

[0007] The bottom plate is arranged in sequence along the raw material conveying direction with a first punching and trimming station, a bottom hole punching station, an inner cut station, a first reinforcing rib punching station, a bottom hole tapping station, a junction box knock-out hole punching station, and a junction box folding station for processing a stackable junction box;

[0008] Two second punching and trimming stations, two second reinforcement rib punching stations, and two trimming and bending stations for processing pipe clamps are arranged in sequence on the bottom plate along the raw material conveying direction;

[0009] The third punching and trimming station for processing the partition, the reinforcing rib and knock-out hole punching station are arranged in sequence on the bottom plate along the raw material conveying direction.

[0010] Among them, two second punching and trimming stations, two second reinforcement rib stamping stations and two trimming and bending stations are symmetrically arranged on both sides of the base plate along the width direction of the base plate; the third punching and trimming station and the reinforcement rib and knock-out hole stamping station are located in the middle of the base plate.

[0011] Furthermore, a panel mounting port is provided on the top surface of the stackable junction box, and the two side edges of the panel mounting port have a plurality of ears extending symmetrically toward the middle, and threaded holes are provided on the ears; a combined connection port is provided on the bottom surface of the stackable junction box, and strip connection holes and circular mounting holes are provided on both sides of the combined connection port, and the first punching and trimming station includes a first trimming punch corresponding to the outer edge shape of the stackable junction box when it is unfolded, a plurality of auxiliary positioning punches for punching auxiliary positioning holes on the material strip, and a plurality of first connection hole punches and mounting hole punches corresponding to the strip connection holes and circular mounting holes respectively; the bottom hole punching station includes a plurality of bottom hole dies for punching bottom holes of threaded holes; the inner side incision station includes a trimming blanking die corresponding to the shape and size of the combined connection port, and the bottom of the trimming blanking die is connected to the blanking space below the base.

[0012] Furthermore, flat reinforcing ribs are pressed on the two side edges of the ears provided at the panel mounting opening; a plurality of first knock-out holes for the wires to pass through are opened on the side of the stackable junction box, and the first reinforcing rib stamping station includes two first reinforcing rib dies corresponding to the shape of the flat reinforcing ribs; the junction box knock-out hole stamping station includes a plurality of knock-out hole dies corresponding to the shape of the first knock-out holes.

[0013] Furthermore, the bottom hole tapping station includes a tapping mechanism for tapping the bottom hole to obtain a threaded hole; the junction box folding station includes a folding mechanism for folding the semi-finished material sheet of the junction box into a box body.

[0014] Furthermore, the pipe clamp includes an arc section located in the middle and two straight plate sections respectively connected to the two ends of the arc section. The straight plate section is provided with a pipe clamp connecting hole for the connecting part to pass through. The second punching and trimming station includes a plurality of second trimming punches for cutting out the side shape of the pipe clamp and a plurality of second connecting hole punches corresponding to the pipe clamp connecting holes.

[0015] Furthermore, the arc segment has a tube clamp reinforcement rib extending along its length direction, and the tube clamp reinforcement rib is in the shape of an outwardly protruding long strip, and the second reinforcement rib stamping station includes a plurality of long strip-shaped second reinforcement rib concave dies corresponding to the shape of the tube clamp reinforcement rib.

[0016] Furthermore, the trimming and bending station includes two end trimming dies corresponding to the end shape of the tube clamp, a blanking groove, a telescopic cylinder corresponding to the bending shape of the arc segment, and a driving member for driving the telescopic cylinder to telescopically move in the blanking groove.

[0017] Furthermore, partition positioning holes are respectively opened at both ends of the partition, and the third punching and trimming station includes a plurality of third trimming punches for cutting out the shape of the partition side edges and a plurality of positioning hole punches corresponding to the partition positioning holes.

[0018] Furthermore, the partition has two partition reinforcement ribs arranged side by side, and the partition reinforcement ribs are in the shape of raised long strips. A second knock-out hole for the power line to pass through is opened between the two partition reinforcement ribs. The reinforcement rib and knock-out hole stamping station includes a number of reinforcement rib punches corresponding to the partition reinforcement ribs and a number of knock-out hole punches corresponding to the second knock-out holes.

[0019] A mold device comprises the above-mentioned lower mold base for stamping stackable junction boxes and an upper mold base matching the lower mold base for stamping stackable junction boxes.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] 1. The lower die base and die device for stamping the stackable junction box of the utility model skillfully combine and reasonably arrange the die required for producing the stackable junction box, the die required for producing the pipe clamp, and the die required for producing the partition, which can effectively save the production line cost, reduce the equipment footprint, improve the material utilization rate, and enhance the production line efficiency.

[0022] 2. Since the lower die base and die device for stamping the stackable junction box have multiple stations, and the multiple stations correspond to different processing procedures, a single stamping stroke of the upper die base can simultaneously realize the processing of multiple junction boxes, pipe clamps, and partitions at different stages, which can greatly improve production efficiency and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the position of the material strip on the lower die base for stamping the stackable junction box in the embodiment of the utility model;

[0024] Figure 2 It is a top view of a lower die base for stamping a stackable junction box in an embodiment of the utility model;

[0025] Figure 3 It is a schematic diagram of the structure of the stackable junction box in the embodiment of the utility model;

[0026] Figure 4 It is a structural schematic diagram of a pipe clamp in an embodiment of the utility model;

[0027] Figure 5 It is a structural schematic diagram of a long junction box and a partition in an embodiment of the utility model;

[0028] Figure 6 It is a front view of a partition in an embodiment of the present utility model.

[0029] Figure Number:

[0030] 1- stackable junction box, 101- top surface, 1011- panel mounting port, 1012- ear, 1013- threaded hole, 1014- plane reinforcement rib, 102- bottom surface, 1021- combined connection port, 1022- bar connection hole, 1023- circular mounting hole, 103- side surface, 1031- first knock-out hole, 1032- locking plate, 1033- extended edge;

[0031] 2- pipe clamp, 201- arc segment, 2011- pipe clamp reinforcement rib, 202- straight plate segment, 2021- pipe clamp connection hole;

[0032] 3-partition, 301-partition reinforcement rib, 302-second knock-out hole, 303-partition positioning hole;

[0033] 4-Long junction box;

[0034] 5- Material strip;

[0035] 11- base, 12- bottom plate;

[0036] 21-first punching and trimming station, 211-first trimming punch, 2111-half punch, 212-auxiliary positioning punch, 213-first connecting hole punch, 214-installation hole punch;

[0037] 22-bottom hole punching station, 221-bottom hole die;

[0038] 23-inner cutting station, 231-cutting and blanking die;

[0039] 24-first reinforcing rib punching station, 241-first reinforcing rib die;

[0040] 25-Bottom hole tapping station;

[0041] 26-junction box knockout hole punching station, 261-knockout hole die;

[0042] 27-junction box folding station;

[0043] 31-second punching and trimming station, 311-second trimming punch, 312-second connecting hole punch;

[0044] 32-second reinforcing rib punching station, 321-second reinforcing rib die;

[0045] 33- trimming and bending station, 331- end trimming die, 332- blanking groove, 333- telescopic cylinder;

[0046] 41-third punching and trimming station, 411-third trimming punch, 412-positioning hole punch;

[0047] 42-reinforcement rib and knock-out hole punching station, 421-reinforcement rib punch, 422-knock-out hole punch. DETAILED DESCRIPTION

[0048] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments are combined with the accompanying drawings to specifically describe the lower die holder and die device for stamping a stackable junction box of the present invention.

[0049] like Figure 3 As shown, the finished product of the stackable junction box includes a rectangular box body folded from a metal sheet, and the two opposite faces along the depth direction of the box body are the top surface 101 and the bottom surface 102, and the other four faces are the side surfaces 103. The top surface 101 has a panel installation opening 1011, and the two side edges of the panel installation opening 1011 have a plurality of ears 1012 extending symmetrically toward the middle, and the ears 1012 are provided with threaded holes 1013. The panel installation opening 1011 is provided with a flat reinforcing rib 1014 pressed on the two side edges of the ears 1012, and the flat reinforcing rib 1014 is in a protruding shape toward the outside of the box body, extending along the edge of the panel installation opening 1011 and the ears 1012. The side surface 103 is provided with a plurality of first knock-out holes 1031 for the wires to pass through. A combined connection port 1021 is provided on the bottom surface 102, and strip connection holes 1022 are provided at positions corresponding to the threaded holes 1013 on both sides of the combined connection port 1021, and circular mounting holes 1023 are provided near the strip connection holes 1022. The bottom surface 102 of the box body is integrally connected with four adjacent side surfaces 103, and the side surfaces 103 are folded vertically upward from the edge of the bottom surface 102; the side surfaces 103 are provided with locking pieces 1032 extending outward on the edge perpendicular to the bottom surface 102, and the locking pieces 1032 are folded to buckle the adjacent side surfaces 103, so that the four side surfaces 103 are connected in sequence to form a stable three-dimensional shape without deformation or disintegration. The top edge of the side surface 103 has an extended edge 1033, and the top surface 101 is formed by folding the extended edges 1033 of the four side surfaces 103 toward the middle of the box body and splicing them together, and the opening formed in the middle after the four extended edges 1033 are enclosed is the panel mounting port 1011.

[0050] When the stackable junction box 1 is unfolded and laid flat, the whole is in a cross shape, and there is a rectangular opening in the middle of the cross, namely the combined connection opening 1021. The raw material used for processing the stackable junction box 1 is a long strip of metal plate (referred to as the material strip 5). After the raw metal plate undergoes multiple processing steps such as punching and trimming, a semi-finished material sheet corresponding to the unfolded shape of the stackable junction box 1 is cut off, and then the semi-finished material sheet is folded into a three-dimensional box body. During processing, a plurality of cross-shaped junction box processing areas for making semi-finished material sheets are divided in the length direction of the material strip 5. Since there are blank areas between the ends of the cross and at the rectangular opening in the middle of the cross, a large amount of waste material remains on the material strip 5 after the semi-finished material sheet is cut off.

[0051] In order to improve material utilization, reduce resource waste, and reduce production costs when processing the stackable junction box 1, this embodiment provides a lower die base for stamping the stackable junction box and a die device, which simultaneously processes the pipe clamp 2 and the partition 3 using the spare part on the material strip 5. The die device includes a lower die base for stamping the stackable junction box and an upper die base matching the lower die base for stamping the stackable junction box. The upper die base and the lower die base for stamping the stackable junction box are arranged relatively to each other up and down. The upper die base is lifted and lowered under the action of a power mechanism to complete the die opening / closing action, thereby realizing the stamping process of the raw metal plate.

[0052] The pipe clamp 2 can be used to hold the pipe when laying the pipe, and is usually fixed to the wall or the ground through a connecting piece such as a nail. Figure 4 As shown, the pipe clamp 2 processed in this embodiment is a double-sided pipe clamp, which is a long strip when unfolded and laid flat. The finished double-sided pipe clamp 2 includes an arc segment 201 located in the middle and two straight plate segments 202 connected to the two ends of the arc segment 201, respectively. The arc segment 201 has a pipe clamp reinforcement rib 2011 extending along its length direction, and the pipe clamp reinforcement rib 2011 is in the shape of a long strip protruding outward. The straight plate segment 202 is provided with a pipe clamp connection hole 2021 for screws and other connecting parts to pass through.

[0053] like Figure 5 , 6 As shown, the partition 3 is usually installed in the long junction box 4, and the interior of the long junction box 4 can be divided into multiple spaces along the length direction. Specifically, the partition 3 is in the shape of a rectangular thin plate, and has two partition reinforcement ribs 301 arranged side by side on the partition 3, and the partition reinforcement ribs 301 are in the shape of raised long strips. A second knock-out hole 302 for the power line to pass through is opened between the two partition reinforcement ribs 301. Partition positioning holes 303 are respectively opened on the partition 3 near both ends of the partition reinforcement rib 301, and the partition positioning holes 303 are used to cooperate with the punch needle of the upper mold base to position the material strip 5 during production.

[0054] like Figure 1 , 2 As shown, the lower die base for stamping a stackable junction box includes a base 11 with a blanking space at the bottom and a bottom plate 12 disposed on the base 11. The raw material conveying direction is parallel to the length direction of the bottom plate 12.

[0055] The bottom plate 12 is along the direction of raw material conveying (i.e. Figure 1 In the direction indicated by the hollow arrow X), a first punching and trimming station 21, a bottom hole punching station 22, an inner incision station 23, a first reinforcing rib punching station 24, a bottom hole tapping station 25, a junction box knock-out hole punching station 26, and a junction box folding station 27 for processing the stackable junction box 1 are arranged in sequence.

[0056] Two second punching and trimming stations 31 , two second reinforcement rib punching stations 32 , and two trimming and bending stations 33 for processing the pipe clamp 2 are sequentially arranged on the bottom plate 12 along the raw material conveying direction.

[0057] A third punching and trimming station 41 and a rib and knock-out hole punching station 42 for processing the partition plate 3 are arranged in sequence on the bottom plate 12 along the raw material conveying direction.

[0058] Among them, the first punching and trimming station 21, the bottom hole stamping station 22, the inner incision station 23, the first reinforcing rib stamping station 24, the bottom hole tapping station 25, the junction box knock-out hole stamping station 26, and the junction box folding station 27 correspond to the cross-shaped junction box processing areas on the material strip 5. The two second punching and trimming stations 31, the two second reinforcing rib stamping stations 32, and the two trimming and bending stations 33 are symmetrically arranged on both sides of the bottom plate 12 along the width direction of the bottom plate 12, one by one, corresponding to the blank area between the ends of the two sides of the adjacent two cross-shaped junction box processing areas on the material strip 5. The third punching and trimming station 41 and the reinforcing rib and knock-out hole stamping station 42 are located in the middle of the bottom plate 12, each corresponding to the blank area at the central rectangular opening of the junction box processing area on the material strip 5.

[0059] In this embodiment, the outer dimensions of the box body of the stackable junction box 1 are 129.2mm*86mm*37.6mm (length*width*depth), and the combined connection port 1021 on the bottom surface 102 is 69.6mm long and 64.6mm wide. Since the size of the single pipe clamp 2 and the partition 3 is smaller than that of the stackable junction box 1, the two blank areas between the two ends of the adjacent cross-shaped junction box processing areas on the material strip 5 can be processed with four pipe clamps 2 at the same time, and the four pipe clamps 2 are arranged at equal intervals along the width direction of the material strip 5; the blank area at the rectangular opening in the middle of the junction box processing area can be processed with two partitions 3, and the two partitions 3 are arranged in parallel along the length direction of the material strip 5.

[0060] The first punching and trimming station 21 includes a first trimming punch 211 corresponding to the outer edge shape of the stackable junction box 1 when it is unfolded, a plurality of auxiliary positioning punches 212 for punching auxiliary positioning holes on the material strip 5, and a plurality of first connection hole punches 213 and mounting hole punches 214 respectively corresponding to the strip connection holes 1022 and the circular mounting holes 1023. In this embodiment, the first trimming punch 211 is composed of four half-side punches 2111 corresponding to the half-side shapes of the two side ends of the stackable junction box 1 when it is unfolded. The two half-side punches 2111 are symmetrical to each other in the length direction of the bottom plate 12, and cooperate with the upper die seat to cut out the two halves of the same side end; in the width direction of the bottom plate 12, the two half-side punches 2111 are also symmetrical to each other, and cut out half of the edge shape of the two side ends respectively. There are two auxiliary positioning punches 212, which are respectively located on both sides of the first trimming punch 211, symmetrical in the width direction, and can punch out auxiliary positioning holes on the material strip 5, so that in the subsequent processing steps, the punch needle of the upper die seat extends into the auxiliary positioning hole to position the material strip 5, thereby improving the processing accuracy. In this embodiment, a strip-shaped connection hole 1022 and a circular mounting hole 1023 are respectively provided on both sides of the combined connection port 1021 on the bottom surface 102 of the stackable junction box. Correspondingly, there are two first connection hole punches 213 and mounting hole punches 214, which are arranged between two half-side punches 2111 symmetrical in the width direction.

[0061] The bottom hole punching station 22 includes a plurality of bottom hole dies 221 for punching the bottom holes of the stackable terminal box ear threaded holes 1013. In this embodiment, there is an ear 1012 on each side edge of the terminal box panel installation opening 1011, and accordingly, there are two bottom hole dies 221, which are symmetrically arranged on the bottom plate 12 near the two side edges.

[0062] The inner cutting station 23 comprises a trimming and blanking die 231 having a shape and size corresponding to the combined connecting port 1021 , and a bottom of the trimming and blanking die 231 is connected to a blanking space below the base 11 .

[0063] The first reinforcing rib punching station 24 includes two first reinforcing rib dies 241 corresponding to the shape of the plane reinforcing rib 1014. In this embodiment, since there is an ear portion 1012 on each side edge of the junction box panel installation opening 1011, the first reinforcing rib dies 241 corresponding to the shape of the plane reinforcing rib 1014 are T-shaped, and the two first reinforcing rib dies 241 are symmetrical to each other in the width direction of the bottom plate 12.

[0064] The junction box knockout hole punching station 26 includes a plurality of knockout hole dies 261 corresponding to the shapes of the first knockout holes 1031. In this embodiment, each of the four sides 103 of the stackable junction box is provided with a first knockout hole 1031. Correspondingly, the number of the knockout hole dies 261 is also four, and they are symmetrical to each other.

[0065] The bottom hole tapping station 25 includes a tapping mechanism for tapping the bottom hole to obtain the threaded hole 1013. The junction box folding station 27 includes a folding mechanism for folding the semi-finished material sheet of the junction box into a box body. In this embodiment, the tapping mechanism and the folding mechanism both adopt the existing structure. The focus of the utility model is the combination and reasonable layout of the junction box mold and the pipe clamp 2 and the partition plate 3 mold, so the specific structure of the tapping mechanism and the folding mechanism will not be repeated.

[0066] The second punching and trimming station 31 includes a plurality of second trimming punches 311 for cutting out the side shape of the tube clamp 2 and a plurality of second connection hole punches 312 corresponding to the tube clamp connection holes 2021. In this embodiment, the second trimming punches 311 are in the shape of long strips, and there are five of them. The five second trimming punches 311 are arranged in parallel in sequence along the width direction of the bottom plate 12. The distance between two adjacent second trimming punches 311 corresponds to the width of the tube clamp 2, and can cooperate with the upper die seat to cut out the edge shape of both sides of the tube clamp 2. There are eight second connection hole punches 312, which are arranged in groups of two. The two second connection hole punches 312 in the same group correspond to the two tube clamp connection holes 2021 at both ends of a tube clamp 2.

[0067] The second reinforcing rib punching station 32 includes a plurality of second reinforcing rib dies 321 corresponding to the shape of the tube clamp reinforcing rib 2011. In this embodiment, the second reinforcing rib dies 321 are in a long strip shape corresponding to the shape of the tube clamp reinforcing rib 2011, and the number of the second reinforcing rib dies 321 is four, and the four second reinforcing rib dies 321 are arranged in sequence along the width direction of the bottom plate 12.

[0068] The trimming and bending station 33 includes two end trimming dies 331 corresponding to the shape of the end of the tube clamp 2, a blanking groove 332, a telescopic cylinder 333 corresponding to the bending shape of the arc segment 201 of the tube clamp, and a driving member (not shown in the figure) for driving the telescopic cylinder 333 to telescope and move in the blanking groove 332. In this embodiment, the telescopic cylinder 333 extends along the width direction of the bottom plate 12. When the telescopic cylinder 333 is extended, it is located in the middle of the blanking groove 332, and can cooperate with the upper die seat to punch out the curvature of the arc segment 201 in the middle of the tube clamp 2. The driving member is a cylinder, and the bottom of the blanking groove 332 is connected to the space below the base 11. After the stamping is completed, the telescopic cylinder 333 is driven by the driving member to shrink to one side of the blanking groove 332, so that the formed tube clamp 2 passes through the blanking groove 332 and falls below the base 11.

[0069] The third punching and trimming station 41 includes a plurality of third trimming punches 411 for cutting out the side shape of the partition 3 and a plurality of positioning hole punches 412 corresponding to the partition positioning holes 303. In this embodiment, two partitions 3 are processed in the blank area at the central rectangular opening of each junction box processing area on the material strip 5, and the two partitions 3 are arranged in parallel along the length direction of the material strip 5. The length of a single partition 3 is consistent with the width of the blank area at the rectangular opening, and the width of a single partition 3 is slightly less than half of the length of the blank area at the rectangular opening. Accordingly, the number of the third trimming punch 411 is one, which is in the shape of a long strip and extends along the width direction of the bottom plate 12, and can cut off the connected part between the two partitions 3 and cut out the edge shape of one side of the partition 3; the number of the positioning hole punches 412 is four, two in a group, symmetrically arranged on both sides of the third trimming punch 411, and can punch out the partition positioning holes 303, so that in the subsequent processing steps, the punch needle on the upper die seat extends into the partition positioning holes 303 to position the material strip 5.

[0070] The rib and knockout hole punching station 42 includes a plurality of rib punches 421 corresponding to the partition ribs 301 and a plurality of knockout hole punches 422 corresponding to the second knockout holes 302. In this embodiment, two partitions 3 are processed in the blank area at the central rectangular opening of each junction box processing area on the strip 5. Accordingly, there are four rib punches 421, all of which are in the shape of long strips and arranged in parallel along the length direction of the bottom plate 12; there are two knockout hole punches 422, which are respectively located between the two rib punches 421.

[0071] In the mold device, an upper mold base that matches the lower mold base for stamping the stackable junction box is lifted and lowered above the lower mold base through a power mechanism, and the upper mold base has a punch that matches the die of the lower mold base and a die that matches the punch of the lower mold base. During the processing, each time the upper mold base completes a stamping operation under the drive of the power mechanism, the feeding device conveys the raw material strip 5 forward by a distance equal to the unfolded length of the junction box. The front end of the strip 5 first enters the first punching and trimming station 21 to cut out the edge shape of the two side ends of the junction box when it is unfolded, and punch out the auxiliary positioning holes on the strip 5 and the strip-shaped connection holes 1022 and the circular mounting holes 1023 on the bottom surface 102 of the junction box; then enters the bottom hole punching station 22 to punch out the bottom hole of the threaded hole 1013 of the ear 1012 of the junction box; then enters the inner incision station 23 to cut out the shape of the combined connection port 1021 on the bottom surface 102 of the junction box; Then, the first reinforcement rib punching station 24 is entered to press out the planar reinforcement rib 1014 on the top surface 101 of the junction box; then, the bottom hole tapping station 25 is entered to tap the bottom hole to obtain the threaded hole 1013 of the ear 1012; then, the junction box knock-out hole punching station 26 is entered to punch out the first knock-out hole 1031 on the side surface 103 of the junction box; finally, the junction box folding station 27 is entered to cut off the cross-shaped semi-finished metal material sheet of the junction box and fold it into a three-dimensional box body.

[0072] During this process, the two side portions of the material strip 5 first pass through the second punching and trimming station 31 to punch out the side shape of the tube clamp 2 and the tube clamp connecting holes 2021 at both ends of the tube clamp 2; then pass through the second reinforcement rib stamping station 32 to press out the shape of the tube clamp reinforcement rib 2011; finally enter the trimming and bending station 33 to cut out the shapes of the two ends of the tube clamp 2, so that the outer edge of the tube clamp 2 is separated from the material strip 5, and the middle part of the tube clamp 2 is supported by the telescopic cylinder 333 and is pressed out to fit the curvature of the upper surface of the telescopic cylinder 333. The telescopic cylinder 333 is driven by the driving member to retract to one side of the blanking groove 332, and the formed tube clamp 2 falls to the bottom of the base 11 and is collected.

[0073] At the same time, the middle part of the material strip 5 first passes through the third punching and trimming station 41 to punch out the partition positioning hole 303, cut off the connected part between the two partitions 3, and cut out the shape of the adjacent side edges of the two partitions 3; then passes through the reinforcement rib and knock-out hole punching station 42 to press out the partition reinforcement rib 301 and punch out the second knock-out hole 302; finally, when the trimming and blanking die 231 of the inner incision station 23 cuts out the shape of the combined connecting port 1021, the edge of the partition 3 is separated from the material strip 5, and the two partitions 3 on the inner side of the combined connecting port 1021 are cut off, and finally fall under the base 11 and are collected.

[0074] Since the lower die base and die device for stamping the stackable junction boxes have multiple workstations, and the multiple workstations correspond to different processing procedures, in the actual production process, a single stamping stroke of the upper die base can simultaneously realize the processing of multiple stackable junction boxes, pipe clamps and partitions at different stages, which can greatly improve production efficiency and reduce production costs.

[0075] In summary, the utility model can stack the lower die base and die device for junction box stamping, which cleverly combines the dies required for pipe clamp and partition production with the dies required for junction box processing and arranges them reasonably, which can effectively save production line costs, improve material utilization, and enhance production line efficiency.

[0076] The above implementation modes are preferred examples of the present invention and are not intended to limit the protection scope of the present invention.

Claims

1. A lower die base for stamping a stackable junction box, characterized in that: include: A base with a material dropping space at the bottom and a bottom plate arranged on the base; The bottom plate is provided with a first punching and trimming station, a bottom hole punching station, an inner notch station, a first reinforcing rib punching station, a bottom hole tapping station, a junction box knock-out hole punching station, and a junction box folding station for processing a stackable junction box in sequence along the raw material conveying direction; The bottom plate is also provided with two second punching and trimming stations, two second reinforcement rib punching stations, and two trimming and bending stations for processing the pipe clamps in sequence along the raw material conveying direction; The bottom plate is also provided with a third punching and trimming station for processing the partition, a reinforcing rib and knock-out hole punching station in sequence along the raw material conveying direction. Among them, the two second punching and trimming stations, the two second reinforcement rib stamping stations and the two trimming and bending stations are symmetrically arranged on both sides of the base plate along the width direction of the base plate respectively; the third punching and trimming station and the reinforcement rib and knock-out hole stamping station are located in the middle part of the base plate.

2. The lower die base for stamping a stackable junction box according to claim 1, characterized in that: The top surface of the stackable junction box is provided with a panel installation opening, and the two side edges of the panel installation opening are provided with a plurality of ears extending symmetrically toward the middle, and the ears are provided with threaded holes; A combined connection port is provided on the bottom surface of the stackable junction box, and strip-shaped connection holes and circular mounting holes are provided on both sides of the combined connection port. The first punching and trimming station includes a first trimming convex mold corresponding to the outer edge shape of the stackable junction box when it is unfolded, a plurality of auxiliary positioning convex molds for punching auxiliary positioning holes on the material strip, and a plurality of first connection hole convex molds and mounting hole convex molds corresponding to the strip-shaped connection holes and the circular mounting holes respectively; The bottom hole punching station includes a plurality of bottom hole concave dies for punching the bottom holes of the threaded holes; The inner cutting station comprises a trimming and blanking die corresponding to the shape and size of the combined connecting port, and the bottom of the trimming and blanking die is connected to the blanking space below the base.

3. The lower die base for stamping a stackable junction box according to claim 2, characterized in that: The panel installation opening is provided with planar reinforcing ribs pressed on the edges of both sides of the ear; The side of the stackable junction box is provided with a plurality of first knock-out holes for the wires to pass through. The first reinforcing rib stamping station includes two first reinforcing rib concave dies corresponding to the shape of the planar reinforcing rib; The junction box knockout hole punching station includes a plurality of knockout hole dies corresponding to the shapes of the first knockout holes.

4. The lower die base for stamping a stackable junction box according to claim 2, characterized in that: The bottom hole tapping station includes a tapping mechanism for tapping the bottom hole to obtain a threaded hole; The junction box folding station comprises a folding mechanism for folding the semi-finished material sheet of the junction box into a box body.

5. The lower die base for stamping a stackable junction box according to claim 1, characterized in that: The pipe clamp comprises an arc section in the middle and two straight plate sections connected to the two ends of the arc section respectively. The straight plate sections are provided with pipe clamp connection holes for the connection piece to pass through. The second punching and trimming station includes a plurality of second trimming punches for cutting out the shape of the side edges of the tube clamp and a plurality of second connecting hole punches corresponding to the connecting holes of the tube clamp.

6. The lower die base for stamping a stackable junction box according to claim 5, characterized in that: The arc segment is provided with a pipe clamp reinforcement rib extending along its length direction, and the pipe clamp reinforcement rib is in the shape of a long strip protruding outwards. The second reinforcing rib punching station includes a plurality of second reinforcing rib concave dies in the shape of the tube clamp reinforcing ribs.

7. The lower die base for stamping a stackable junction box according to claim 6, characterized in that: The trimming and bending station includes two end trimming dies corresponding to the end shapes of the tube clamp, a blanking groove, a telescopic cylinder corresponding to the bending shape of the arc segment, and a driving member for driving the telescopic cylinder to telescopically move in the blanking groove.

8. The lower die base for stamping a stackable junction box according to claim 1, characterized in that: The two ends of the partition are respectively provided with partition positioning holes. The third punching and trimming station includes a plurality of third trimming punches for cutting out the shape of the side edges of the partition and a plurality of positioning hole punches corresponding to the positioning holes of the partition.

9. The lower die base for stamping a stackable junction box according to claim 1, characterized in that: The partition has two partition reinforcement ribs arranged side by side, the partition reinforcement ribs are in the shape of raised long strips, and a second knock-out hole for the power supply line to pass through is opened between the two partition reinforcement ribs. The reinforcing rib and knock-out hole punching station comprises a plurality of reinforcing rib punches corresponding to the partition reinforcing ribs and a plurality of knock-out hole punches corresponding to the second knock-out holes.

10. A mold device, characterized in that: include: The lower die base for stamping a stackable junction box as claimed in any one of claims 1 to 9 and an upper die base matching the lower die base for stamping a stackable junction box.

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