CN109909374B - Continuous forming device and continuous forming process for processing micro-motor shell - Google Patents

Abstract

The invention provides a continuous forming device and a continuous forming process for processing a micro-motor shell, which integrate the rolling, core pulling and riveting technologies of the traditional process into a whole, and the products at each station are formed in one set of die, so that the extrusion deformation of the products in the processes of multiple production and transportation is avoided, the problems of unqualified rolling roundness, poor riveting, unstable size of the formed products and the like caused by human operation factors are solved, and the production efficiency is improved; the invention adopts 4 times of pre-bending, and the radian of the pre-bending is smaller than 90 degrees, so that roundness rebound caused by bending can be reduced; the invention bends the end of the product to form the buckling part, and uses the material guiding structure of the rolling station to carry out rolling buckling, thereby being convenient for rounding. The invention can make the product more stable, further ensure the stability and qualification rate of the coiled plate casing during assembly and operation, and save the manufacturing cost in each link.

Description

Continuous forming device and continuous forming process for processing micro-motor shell

Technical Field

The invention relates to the technical field of coiled plate casing production, in particular to a continuous forming device and a continuous forming process for processing a micro-motor shell.

Background

As the degree of refinement of automobiles increases, requirements for automobile parts become higher and higher, so that it is important to control quality of the parts by controlling manufacturing processes of the parts. This requirement is more pronounced in automotive micro-motors.

At present, the micro motor for the vehicle requires high rotating speed and low noise, so the requirements on various aspects of motor shells are very high. The traditional process comprises the steps of rolling, core pulling and riveting, and is low in efficiency; moreover, the problems of extrusion deformation, unqualified roundness of the rolled round, poor riveting, unstable product, high reject ratio and the like easily occur in the production and carrying processes of the product. Therefore, potential safety hazards can be caused to the motor, normal remote rotation of the motor is affected, and the motor shell is seriously cracked.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a continuous forming device and a continuous forming process for processing a micro-motor shell.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the continuous forming device for processing the micro-motor shell comprises an upper die and a lower die, wherein a first arc pressing station, a second arc pressing station, a third arc pressing station, a fourth arc pressing station, at least one empty step station, a rolling station, a riveting station and a shaping station are sequentially arranged between the upper die and the lower die according to the product processing sequence; the arc pressing angles of the first arc pressing station, the second arc pressing station, the third arc pressing station and the fourth arc pressing station are all smaller than 90 degrees.

The first arc pressing station comprises a first arc pressing punch set and a first lower die forming block matched with the first arc pressing punch set, the first arc pressing punch set is arranged on the upper die, the first lower die forming block is arranged on the lower die, third arc imitation is arranged at two ends of the first lower die forming block, first arc imitation and a second arc imitation are arranged at the outer side of the third arc imitation and used for pressing two ends of a product out of a buckling part respectively, and the first arc imitation and the second arc imitation are connected with the third arc imitation in a seamless and smooth mode.

The rolling station comprises a rolling circle forming block and a rolling circle lower die forming block which are opposite and provided with concave circular arcs, the rolling circle forming block is fixed on the upper die, the rolling circle lower die forming block is fixed on the lower die, and the upper surface of the rolling circle lower die forming block is provided with a material guiding structure with gradually changed radius, wherein the buckling parts at two ends of a product are conveniently buckled with the material guiding structure smoothly.

The riveting station comprises an upper riveting die forming block with a concave half arc and a lower riveting die forming block with a concave half arc, which are opposite, wherein the upper riveting die forming block is arranged on the upper die, and the lower riveting die forming block is arranged on the lower die; the automatic forming machine comprises an upper die, a lower die, a rolling station, a riveting station, a shaping station and a hollow station, wherein the rolling station is used for rolling the upper die, the lower die is used for rolling the lower die, the hollow station, the rolling station, the riveting station and the shaping station are internally provided with floating core-pulling structures, and the floating core-pulling structures are positioned between the upper die and the lower die and fixedly arranged on one side edge of the lower die.

Preferably, the second arc pressing station comprises a second arc pressing punch set and a second lower die forming block matched with the second arc pressing punch set, the second arc pressing punch set is arranged on the upper die, the second lower die forming block is arranged on the lower die, and both ends of the second arc pressing punch set and both ends of the second lower die forming block are respectively provided with a fourth arc imitation and a fifth arc imitation; the third arc pressing station comprises a third arc pressing punch set and a third lower die forming block matched with the third arc pressing punch set, the third arc pressing punch set is arranged on the upper die, the third lower die forming block is arranged on the lower die, and sixth imitation arcs are arranged at two ends of the third arc pressing punch set and the third lower die forming block; the fourth arc pressing station comprises a fourth arc pressing punch set and a fourth lower die forming block matched with the fourth arc pressing punch set, the fourth arc pressing punch set is arranged on the upper die, the fourth lower die forming block is arranged on the lower die, and seventh arc imitation is arranged at two ends of the fourth arc pressing punch set and two ends of the fourth lower die forming block.

Preferably, each arc imitation of the first arc pressing punch set, the second arc pressing punch set, the third arc pressing punch set and the fourth arc pressing punch set is provided with a first roundness rebound allowance, and each arc imitation of the first lower die forming block, the second lower die forming block, the third lower die forming block and the fourth lower die forming block is provided with a second roundness rebound allowance; the circular arcs of the rolling upper die forming block and the circular arcs of the riveting upper die forming block are respectively provided with a third roundness rebound allowance, and the circular arcs of the riveting lower die forming block are respectively provided with a fourth roundness rebound allowance.

Preferably, the first pressing arc punch set, the first lower die forming block, the second pressing arc punch set, the second lower die forming block, the third pressing arc punch set, the third lower die forming block, the fourth pressing arc punch set, the fourth lower die forming block, the winding upper die forming block, the winding lower die forming block, the riveting upper die forming block and the edge of the part, which is in contact with a product, are all provided with round corners.

Preferably, the width of the first arc pressing punch set is greater than the projection length of the rolling product on the first arc pressing station on the lower die, the width of the second arc pressing punch set is greater than the projection length of the rolling product on the second arc pressing station on the lower die, the width of the third arc pressing punch set is greater than the projection length of the rolling product on the third arc pressing station on the lower die, and the width of the fourth arc pressing punch set is greater than the projection length of the rolling product on the fourth arc pressing station on the lower die.

Preferably, the first lower die forming block, the second lower die forming block, the third lower die forming block and the fourth lower die forming block are respectively provided with milling grooves on two sides, and the width and the depth of the milling grooves are both larger than those of the product on the same station and the corresponding arc pressing punch set by at least 2 mm.

Preferably, the idle station comprises a support column for preventing the product from deforming and a fifth lower die forming block, wherein the support column is arranged on the upper die, and the fifth lower die forming block is arranged on the lower die.

Preferably, the floating core pulling structure comprises a limiting profiling block and a floatable core rod, wherein the limiting profiling block and the core rod are oppositely arranged at two sides of the lower die, and the core rod penetrates through the space between the upper die and the lower die and is erected on the limiting profiling block when extending horizontally.

Preferably, the core rod is arranged on the limiting profiling block in a penetrating manner in the formed rolled product, and the diameter of the core rod is smaller than that of the formed rolled product.

A continuous molding process for processing a micro-motor housing, comprising the steps of:

the first time of pre-bending: the two ends of the product are respectively rounded to form a first radian and a second radian which are used for being buckled by the two ends in an overlapping way when the product is finally rolled, and then a third radian is respectively and simultaneously rounded to the non-rounded part in the middle of the product, wherein the first radian, the second radian and the third radian are smaller than 90 degrees.

Second pre-bending: the product advances along with the material belt, presses the circle to the part of the product middle part not pressing the circle, wherein the one end that is close to pressing the first radian of circle presses the fourth radian of circle, and the one end that is close to pressing the second radian of circle presses the fifth radian of circle, and wherein fourth radian and fifth radian are all less than 90 degrees.

Third pre-bending: the product advances along with the material belt, and the two ends of the non-round pressing part in the middle of the product are respectively pressed with a sixth radian with the round pressing size smaller than 90 degrees.

Fourth pre-bending: the product advances along with the material belt, and the two ends of the non-round pressing part in the middle of the product are respectively pressed with a seventh radian with the round pressing size smaller than 90 degrees.

And (3) rolling: the product enters an empty station along with a material belt to carry out adjustment transition, then enters a rolling station to roll, at the moment, the two ends of a part, which is not pressed in the middle of the product, are respectively pressed with an eighth radian with the round size smaller than 90 degrees, then the two ends of the first radian and the second radian of the product are pressed with the product by utilizing a material guiding structure to carry out overlapping buckling, and the rolling is completed, wherein the rolling and the rolling are carried out by utilizing a floating loose core mode.

Riveting and shaping: and (3) riveting and shaping the product after the rolling step, wherein the riveting and shaping are performed by adopting a floating core pulling mode, and finally, cutting off the strip point, rolling out the product, and finishing the processing.

Compared with the prior art, the invention has the beneficial effects that: the rolling, core pulling and riveting technologies of the traditional process are integrated, products at each station are molded in one set of die, extrusion deformation of the products in the processes of multiple production and transportation is avoided, the problems of unqualified rolling roundness, poor riveting, unstable size of the molded products and the like caused by human operation factors are solved, and the production efficiency is improved; when the product is subjected to arc pressing bending, 4 times of pre-bending are adopted, the product is finally subjected to bending again during rolling, the bending is performed for multiple times through multiple stations, the arc pressing radian is smaller than 90 degrees, and roundness rebound caused by bending can be reduced, so that the rolling is more accurate; the arc pressing degree of each station is small, so that the required stamping force is small, the damage to the die can be reduced, and the service life of the die is prolonged; the invention bends the end of the product to form the buckling part, and uses the material guiding structure of the rolling station to carry out rolling buckling, thereby being convenient for rounding. The invention can make the product more stable, further ensure the stability and qualification rate of the coiled plate casing during assembly and operation, and save the manufacturing cost in each link.

Drawings

Fig. 1 is a process flow diagram of a continuous molding apparatus and continuous molding process for processing a micro-motor housing according to the present invention.

Fig. 2 is a schematic view of a first arc pressing station structure of a continuous forming device for processing a micro-motor shell.

Fig. 3 is a schematic diagram of a second arc pressing station structure of the continuous forming device for processing the micro-motor shell.

Fig. 4 is a schematic diagram of a third arc pressing station structure of a continuous forming device for processing a micro-motor shell.

Fig. 5 is a schematic diagram of a fourth arc pressing station structure of the continuous forming device for processing the micro-motor shell.

Fig. 6 is a schematic diagram of a space-step station structure of a continuous molding apparatus for processing a micro-motor housing according to the present invention.

Fig. 7 is a schematic view of a rolling station structure of a continuous forming device for processing a micro-motor shell.

Fig. 8 is a schematic structural view of a riveting station of a continuous forming apparatus for processing a micro-motor housing according to the present invention.

Detailed Description

For a further understanding of the objects, construction, features, and functions of the invention, reference should be made to the following detailed description of the preferred embodiments.

Referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7 and fig. 8, a continuous molding device for processing a micro-motor housing according to an embodiment of the present invention includes an upper die 1 and a lower die, wherein a first arc pressing station 3, a second arc pressing station 4, a third arc pressing station 5, a fourth arc pressing station 6, at least one space station 7, a rounding station 8, a riveting station 9 and a shaping station 10 are sequentially included between the upper die 1 and the lower die 2 according to a material belt advancing direction X and a product processing sequence. The stations are integrated between the upper die 1 and the lower die 2, so that finished micro-motor shells can be directly produced in the same set of dies, the product procedures can be reduced, the extrusion deformation of the products in the processes of multiple production and transportation can be avoided, and the product qualification rate and the production efficiency are improved. The arc pressing angles of the first arc pressing station 3, the second arc pressing station 4, the third arc pressing station 5 and the fourth arc pressing station 6 are all smaller than 90 degrees. The arc radian is smaller than 90 degrees, and compared with the bending at a larger angle in the prior art, the roundness rebound of the product can be reduced.

As shown in fig. 2, the first pressing arc station 3 includes a first pressing arc punch set 11 and a first lower die forming block 12 matched with the first pressing arc punch set 11, the first pressing arc punch set 11 is disposed on the upper die 1, the first lower die forming block 12 is disposed on the lower die 2, both ends of the first pressing arc punch set 11 and the first lower die forming block 12 are respectively provided with a third arc 15, a first arc 13 and a second arc 14 for pressing both ends of a product out of a buckling part are respectively disposed outside the third arc 15, and the first arc 13 and the second arc 14 are respectively connected with the third arc 15 close to the first arc in a seamless and smooth manner. The first arc pressing station 3 is used for carrying out primary pre-bending on the product, and the pre-bending angle is smaller than 90 degrees, so that roundness rebound can be reduced; the first arc-like 13 and the second arc-like 14 are used for extruding buckling parts at two ends of the product, so that the two ends of the product are buckled and overlapped with each other when the product is rolled, and the product is rounded.

As shown in fig. 7, the rolling station 8 includes a rolling circle forming block 16 with a concave arc and a rolling circle lower forming block 17 opposite to each other, the rolling circle forming block 16 is fixed on the upper die 1, the rolling circle lower forming block 17 is fixed on the lower die 2, and a material guiding structure 18 with a gradually changed radius is arranged on the upper surface of the rolling circle lower forming block 17, wherein the material guiding structure is convenient for the buckling parts at two ends of a product to be buckled smoothly. The main working object of the material guiding structure 18 is the buckling part of the two ends of the product pressed by the first imitation circular arc 13 and the second imitation circular arc 14, and the buckling parts are guided to be buckled and overlapped by using circular arc sections with different radiuses.

As shown in fig. 8, the riveting station 9 includes an opposite riveting upper die forming block 19 with a concave half arc and a riveting lower die forming block 20 with a concave half arc, the riveting upper die forming block 19 is arranged on the upper die 1, and the riveting lower die forming block 20 is arranged on the lower die 2; the hollow station 7, the rolling station 8, the riveting station 9 and the shaping station 10 are respectively provided with a floating core-pulling structure 21, and the floating core-pulling structure 21 is positioned between the upper die 1 and the lower die 2 and fixedly arranged on one side edge of the lower die 2. Preferably, the floating core-pulling structure 21 comprises a limiting profiling block 22 and a floatable core rod 23, wherein the limiting profiling block 22 and the core rod 23 are oppositely arranged at two sides of the lower die 2, and the core rod 23 penetrates between the upper die 1 and the lower die 2 and is erected on the limiting profiling block 22 when horizontally extending. Further, the core rod 23 is arranged in the formed rolled product in a penetrating manner when being erected on the limiting profiling block 22, the diameter of the core rod 23 is smaller than that of the formed rolled product, the material stripping and the material belt conveying of the formed rolled product are smooth, and roundness rebound errors of the product are overcome when rolling and riveting. The setting of structure 21 of loosing core floats can provide roundness foundation when product is rolled up circle, riveting and plastic, and can directly follow the product in loosing core when the die sinking and go out, avoids again carrying out manual loose core after rolling up circle, riveting and plastic, not only can reduce operating time, guarantee that the pay-off is smooth, and can avoid the product to warp. In the invention, a punching station 24 and a trimming station 25 are sequentially arranged before the first arc pressing station 3, products are punched and trimmed firstly, then the products enter the first arc pressing station 3, the products enter a circle rolling station 8 for circle rolling after being pre-bent at different angles through the various arc pressing stations, then enter a riveting station 9 for riveting, and finally the strip points of the strip are cut off after the shaping by a shaping station 10, so that the production work of the products is completed. In the coiling station 8, the riveting station 9 and the shaping station 10, when the upper die 1 is pressed down, a core rod 23 in the floating core-pulling structure 21 automatically stretches out to pass through the inside of a coiled product and is erected on the limiting profiling block 22 for supporting the product, so that the product is suspended, coiling, riveting and shaping of the product can be completed, and when the upper die 1 is in an open state, the upper die 1 moves upwards, the floating core-pulling structure 21 drives the core rod 23 to reset, and is pulled out from the formed coiled product, material stripping is completed, and the advancing of a material belt is not influenced.

In an embodiment, as shown in fig. 2, the upper die 1 includes an upper die holder 26, an upper die pad 27, an upper die clamping plate 28, a back supporting plate 29 and an upper stripping plate 30, and the lower die 2 includes a lower pad 31 and a lower die holder 32, so that the splicing structure is convenient for stripping products, and is convenient for disassembling and replacing vulnerable parts, and the service life of the system can be prolonged.

In an embodiment, as shown in fig. 3, 4 and 5, preferably, the second arc pressing station 4 includes a second arc pressing punch set 33 and a second lower die forming block 34 matched with the second arc pressing punch set 33, the second arc pressing punch set 33 is arranged on the upper die 1, the second lower die forming block 34 is arranged on the lower die 2, and both ends of the second arc pressing punch set 33 and both ends of the second lower die forming block 34 are respectively provided with a fourth arc imitation 35 and a fifth arc imitation 36; the third arc pressing station 5 comprises a third arc pressing punch group 37 and a third lower die forming block 38 matched with the third arc pressing punch group 37, the third arc pressing punch group 37 is arranged on the upper die 1, the third lower die forming block 38 is arranged on the lower die 2, and both ends of the third arc pressing punch group 37 and the third lower die forming block 38 are provided with sixth imitation arcs 39; the fourth arc pressing station 6 comprises a fourth arc pressing punch set 40 and a fourth lower die forming block 41 matched with the fourth arc pressing punch set 40, the fourth arc pressing punch set 40 is arranged on the upper die 1, the fourth lower die forming block 41 is arranged on the lower die 2, and seventh arc imitation 42 is arranged at two ends of the fourth arc pressing punch set 40 and the fourth lower die forming block 41. Because the pressing arc punch sets and the lower die forming blocks are different in the second pressing arc station 4, the third pressing arc station 5 and the fourth pressing arc station 6, the second pressing arc station 4 utilizes the second pressing arc punch set 33 to complete the second pre-bending of the non-pressed round part of the middle part of the product by the fourth imitation arc 35 and the fifth imitation arc 36 on the second lower die forming block 34; the third circular arc pressing punch group 37 of the third circular arc pressing station 5 and the sixth imitation circular arc 39 of the third lower die forming block 38 are utilized to perform third pre-bending on the non-circular arc pressing part in the middle of the product; and the fourth arc pressing punch set 40 of the fourth arc pressing station 6 and the seventh arc imitation 42 of the fourth lower die forming block 41 are utilized to perform fourth pre-bending on the non-round part of the middle part of the product, so as to complete the pre-bending operation before the product is rolled.

As shown in fig. 6, the idle station 7 preferably includes a support column 43 for preventing deformation of the product, the support column 43 being disposed on the upper die 1, and a fifth lower die forming block 44, the fifth lower die forming block 44 being disposed on the lower die 2. When the product is in the idle station 7, the supporting column 43 is used for supporting the product between the upper die 1 and the fifth lower die forming block 44, the product is arranged on the core rod 23 of the floating core-pulling structure 21 in a penetrating way, the product can be prevented from being extruded and deformed, and the product can be adjusted and transited in the idle station 7. The idle station 7 also facilitates providing stations when additional steps are required on future moulds between the fourth arc pressing station 6 and the rounding station 8.

Preferably, each of the imitation arcs of the first pressing arc punch set 11, the second pressing arc punch set 33, the third pressing arc punch set 37 and the fourth pressing arc punch set 40 is provided with a first roundness rebound allowance, and in an embodiment, the first roundness rebound allowance refers to an amount by which the imitation arc radius of each pressing arc punch set is reduced compared with the outer arc radius of a product to be formed at a corresponding station, and may be specifically R0.38; each of the simulated arcs of the first lower die forming block 12, the second lower die forming block 34, the third lower die forming block 38 and the fourth lower die forming block 41 is provided with a second roundness springback margin, which in one embodiment refers to the amount by which the simulated arc radius of each lower die forming block is enlarged on the basis of the inner arc radius of the product to be formed at the corresponding station, and may be specifically R0.38; the circular arc of the rolling circle die forming block 16 and the circular arc of the riveting upper die forming block 19 are provided with third roundness rebound allowance, wherein the third roundness rebound allowance refers to the amount by which the circular arc of the rolling circle die forming block 16 and the circular arc of the riveting upper die forming block 19 are reduced on the basis of the radius of the outer circle of a product on a corresponding station, and can be R0.1; the circular arc of the riveting lower die forming block 20 is provided with a fourth roundness rebound allowance, wherein the fourth roundness rebound allowance refers to the amount that the circular arc of the riveting lower die forming block 20 is reduced on the basis of the radius of the inner circle of a product on the station, and can be R0.1; the first roundness resilience margin, the second roundness resilience margin, the third roundness resilience margin and the fourth roundness resilience margin are all used for overcoming errors caused by roundness resilience.

As shown in fig. 2, 3, 4, 5, 6, 7 and 8, preferably, the edges of the parts, where the first arc pressing punch set 11, the first lower die forming block 12, the second arc pressing punch set 33, the second lower die forming block 34, the third arc pressing punch set 37, the third lower die forming block 38, the fourth arc pressing punch set 40, the fourth lower die forming block 41, the circle rolling die forming block 16, the circle rolling lower die forming block 17, the riveting upper die forming block 19 and the riveting lower die forming block 20 are in contact with a product, are all provided with round corners R, which play a role of smooth transition so as to avoid scratching the product, the round corners R are preferably 1-5 mm, and the specific round corners R can be scaled according to practical situations.

As shown in fig. 2, 3, 4 and 5, preferably, the width of the first arc pressing punch set 11 is greater than the length of the projection of the rolled product on the first arc pressing station 3 on the lower die 2, the width of the second arc pressing punch set 33 is greater than the length of the projection of the rolled product on the second arc pressing station 4 on the lower die 2, the width of the third arc pressing punch set 37 is greater than the length of the projection of the rolled product on the third arc pressing station 5 on the lower die 2, and the width of the fourth arc pressing punch set 40 is greater than the length of the projection of the rolled product on the fourth arc pressing station 6 on the lower die 2. Because roundness rebound exists in the arc pressing operation, the width of each arc pressing punch set is wider, the accuracy of arc pressing of the station can be ensured, the arc pressing size can be folded in place, and part of roundness rebound is counteracted.

As shown in fig. 2, 3, 4 and 5, preferably, milling grooves 45 are respectively formed on two sides of the first lower die forming block 12, the second lower die forming block 34, the third lower die forming block 38 and the fourth lower die forming block 41, and the width and depth of the milling grooves 45 are at least 2 mm greater than those of the product on the same station and the corresponding pressing arc punch set, so that the deformation of the product, the impact arc punch and other phenomena can be avoided, and the danger that the die is squeezed to crack is avoided.

In an embodiment, the first arc-pressing punch 11 is matched with the first arc-imitating 13 and the second arc-imitating 14 of the second arc-pressing punch 33, and a 6-degree arc and a 14-degree arc are pre-bent at two ends of the product to control the shape of the buckling part; the third imitation arc 15 is utilized to respectively pre-bend the arc of which one end is 45 degrees on the side edges of the arc of 6 degrees and the arc of 14 degrees on the product, the arc of 45 degrees close to the arc of 6 degrees is in seamless smooth connection with the arc of 6 degrees, the arc of 45 degrees close to the arc of 14 degrees is in seamless smooth connection with the arc of 14 degrees, and thus the pre-bending work of the first arc pressing station 3 is completed. In the second arc pressing station 4, the second arc pressing punch set 33 and the second lower die forming block 34 are matched with each other, the two ends of the unbent part of the product passing through the first arc pressing station 3 are respectively pressed by 48 degrees and 42 degrees, the 48-degree arc is close to the 6-degree arc and is in seamless smooth connection with the adjacent 45-degree arc, the 42-degree arc is close to the 14-degree arc and is in seamless smooth connection with the adjacent 45-degree arc, and the pre-bending operation of the second arc pressing station 4 is completed. In the third arc pressing station 5, the two ends of the non-round pressing part in the middle of the product are respectively pressed by 45 degrees by utilizing the mutual matching of the third arc pressing punch set 37 and the third lower die forming block 38, one 45-degree arc is in seamless and smooth connection with the adjacent 48-degree arc, and the other 45-degree arc is in seamless and smooth connection with the adjacent 42-degree arc, so that the pre-bending work of the third arc pressing station 5 is completed. In the fourth arc pressing station 6, the two ends of the non-round pressing part in the middle of the product are respectively pressed for 64 degrees by utilizing the mutual matching of the fourth arc pressing punch set 40 and the fourth lower die forming block 41, and the two 64-degree arcs are respectively and seamlessly and smoothly connected with 45-degree arcs adjacent to the two 64-degree arcs, so that the pre-bending work of the fourth arc pressing station 6 is completed. The product after four times of pre-bending enters a rolling station 8 after passing through an idle station 7, when a rolling upper die forming block 16 is pressed downwards, a core rod 23 of a floating core pulling structure 21 is driven to extend out and penetrate through the radian of the product rolled out after four times of pre-bending, in the process of pressing down the rolling upper die forming block 16, the two ends of the non-rolling part in the middle of the product are respectively pressed to be round 26 degrees, two circular arcs of 26 degrees are respectively connected with adjacent 64 circular arcs in a seamless and smooth manner, and buckling parts at the two ends of the product are buckled and overlapped by using a material guiding structure 18 of a rolling lower die forming block 17, so that the rolling work is finally completed. After the rolling is finished, the product enters a riveting station 9, a core rod 23 of a floating core pulling structure 21 is penetrated in a formed rolled product and is used for riveting the buckling part, after the riveting is finished, a riveting upper die forming block 19 moves upwards to drive the core rod 23 to reset, the product is pulled out from the riveted product, and then the product enters a shaping station 10 to shape the product and then is blanked.

A continuous molding process for processing a micro-motor housing, comprising the steps of:

the first time of pre-bending: the two ends of the product are respectively rounded to form a first radian and a second radian which are used for overlapping and buckling the two ends when the product is finally rounded, and then a third radian is respectively and simultaneously rounded to the non-rounded part in the middle of the product, wherein the first radian, the second radian and the third radian are all smaller than 90 degrees, in one embodiment, the first radian is 6 degrees, the second radian is 14 degrees, the third radian is 45 degrees, and two 45-degree circular arcs are respectively connected with a 6-degree circular arc and a 14-degree circular arc in a seamless and smooth manner.

Second pre-bending: the product advances along with the material belt, presses the circle to the part of the product middle part not pressing the circle, wherein the one end that is close to pressing the first radian of circle presses the fourth radian of circle, and the one end that is close to pressing the second radian of circle presses the fifth radian of circle, and wherein fourth radian and fifth radian are all less than 90 degrees. In one embodiment, the fourth arc is 48 degrees, the fifth arc is 42 degrees, the 48 degree arc is close to the 6 degree arc and is in seamless and smooth connection with the adjacent 45 degree arc, and the 42 degree arc is close to the 14 degree arc and is in seamless and smooth connection with the adjacent 45 degree arc.

Third pre-bending: the product advances along with the material belt, and the two ends of the non-round pressing part in the middle of the product are respectively pressed with a sixth radian with the round pressing size smaller than 90 degrees. In one embodiment, the sixth arc is 45 degrees, wherein one 45 degree arc is seamlessly and smoothly connected with an adjacent 48 degree arc, and wherein the other 45 degree arc is seamlessly and smoothly connected with an adjacent 42 degree arc.

Fourth pre-bending: the product advances along with the material belt, and the two ends of the non-round pressing part in the middle of the product are respectively pressed with a seventh radian with the round pressing size smaller than 90 degrees. In one embodiment, the seventh arc is 64 degrees, and two 64-degree arcs are seamlessly and smoothly connected with 45-degree arcs adjacent to the seventh arc.

And (3) rolling: the product enters an empty station along with the material belt to adjust and transition, then enters a rolling station 8 to roll, at the moment, the two ends of the non-rolling part in the middle of the product are respectively pressed with an eighth radian with the round size smaller than 90 degrees, and then the two ends of the first radian and the second radian of the product are overlapped and buckled by utilizing a material guiding structure 18 to finish rolling, wherein the rolling is adjusted and rolled in a floating loose core mode, blocking can be avoided, and feeding and shaping are facilitated. In one embodiment, the eighth arc is 26 degrees, and the 26-degree arcs are respectively connected with 45-degree arcs adjacent to the eighth arc in a seamless and smooth mode.

Riveting and shaping: and (3) riveting and shaping the product after the rolling step, wherein the riveting and shaping are performed in a floating core pulling mode, the cylindricity of the product is ensured, meanwhile, the stripping is convenient, the strip point is cut off, the product rolls out, and the processing is finished. In the riveting process, the core rod 23 of the floating core-pulling structure 21 is penetrated in the formed rolled product, the riveting upper die forming block 19 is pressed downwards to rivet the buckling part, after the riveting is completed, the riveting upper die forming block 19 moves upwards to drive the core rod 23 to reset, and the core rod 23 is pulled out from the riveted product, so that the material belt can conveniently advance according to the requirement.

The process integrates the rolling, core pulling and riveting technologies of the traditional process, products at all stations are sequentially molded in the same set of mold, so that the production process is saved, the production efficiency is improved, the reject ratio of the products is reduced, the angle of each pre-bending is smaller than 90 degrees, the roundness rebound error can be reduced, rolling and riveting are performed by utilizing a floating core pulling mode, the working time is saved, and the deformation of the products during core pulling is avoided.

According to the continuous forming device and the continuous forming process for processing the micro-motor shell, disclosed by the invention, the rolling, core pulling and riveting technologies of the traditional process are integrated, the products at each station are formed in one step in the same set of die, so that extrusion deformation of the products in the processes of multiple production and transportation is avoided, the problems of unqualified rolling roundness, poor riveting, unstable size of the formed products and the like caused by human operation factors are solved, and the production efficiency is improved; when the product is subjected to arc pressing bending, 4 times of pre-bending are adopted, the product is finally subjected to bending again during rolling, the bending is performed for multiple times through multiple stations, the arc pressing radian is smaller than 90 degrees, and roundness rebound caused by bending can be reduced, so that the rolling is more accurate; the arc pressing degree of each station is small, so that the required stamping force is small, the damage to the die can be reduced, and the service life of the die is prolonged; the invention bends the end of the product to form the buckling part, and uses the material guiding structure of the rolling station to carry out rolling buckling, thereby being convenient for rounding. The invention can make the product more stable, further ensure the stability and qualification rate of the coiled plate casing during assembly and operation, and save the manufacturing cost in each link.

The invention has been described with respect to the above-described embodiments, however, the above-described embodiments are merely examples of practicing the invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Claims (9)

1. The continuous forming device for processing the micro-motor shell comprises an upper die and a lower die, and is characterized in that a first arc pressing station, a second arc pressing station, a third arc pressing station, a fourth arc pressing station, at least one idle station, a rolling station, a riveting station and a shaping station are sequentially arranged between the upper die and the lower die according to the product processing sequence; the arc pressing angles of the first arc pressing station, the second arc pressing station, the third arc pressing station and the fourth arc pressing station are all smaller than 90 degrees;

the first arc pressing station comprises a first arc pressing punch set and a first lower die forming block matched with the first arc pressing punch set, the first arc pressing punch set is arranged on the upper die, the first lower die forming block is arranged on the lower die, third imitation arcs are arranged at two ends of the first arc pressing punch set and the first lower die forming block, a first imitation arc and a second imitation arc for pressing two ends of a product out of a buckling part are respectively arranged at the outer side of the third imitation arc, and the first imitation arc and the second imitation arc are respectively connected with the third imitation arc close to the first imitation arc in a seamless and smooth mode;

the second arc pressing station comprises a second arc pressing punch set and a second lower die forming block matched with the second arc pressing punch set, the second arc pressing punch set is arranged on the upper die, the second lower die forming block is arranged on the lower die, and both ends of the second arc pressing punch set and both ends of the second lower die forming block are respectively provided with a fourth arc imitation and a fifth arc imitation; the third arc pressing station comprises a third arc pressing punch set and a third lower die forming block matched with the third arc pressing punch set, the third arc pressing punch set is arranged on the upper die, the third lower die forming block is arranged on the lower die, and sixth imitation arcs are arranged at two ends of the third arc pressing punch set and the third lower die forming block; the fourth arc pressing station comprises a fourth arc pressing punch set and a fourth lower die forming block matched with the fourth arc pressing punch set, the fourth arc pressing punch set is arranged on the upper die, the fourth lower die forming block is arranged on the lower die, and seventh imitation arcs are arranged at two ends of the fourth arc pressing punch set and the fourth lower die forming block;

the rolling station comprises a rolling upper die forming block and a rolling lower die forming block which are opposite and provided with concave circular arcs, the rolling upper die forming block is fixed on the upper die, the rolling lower die forming block is fixed on the lower die, and the upper surface of the rolling lower die forming block is provided with a material guiding structure with gradually changed radius, wherein the material guiding structure is convenient for the buckling parts at two ends of a product to be buckled smoothly;

the riveting station comprises an upper riveting die forming block with a concave half arc and a lower riveting die forming block with a concave half arc, which are opposite, wherein the upper riveting die forming block is arranged on the upper die, and the lower riveting die forming block is arranged on the lower die; the automatic forming machine comprises an upper die, a lower die, a rolling station, a riveting station, a shaping station and a hollow station, wherein the rolling station is used for rolling the upper die, the lower die is used for rolling the lower die, the hollow station, the rolling station, the riveting station and the shaping station are internally provided with floating core-pulling structures, and the floating core-pulling structures are positioned between the upper die and the lower die and fixedly arranged on one side edge of the lower die.

2. The continuous molding device for processing a micro-motor housing according to claim 1, wherein each of the simulated arcs of the first, second, third, and fourth pressing arc punch sets is provided with a first roundness springback margin, and each of the simulated arcs of the first, second, third, and fourth lower mold blocks is provided with a second roundness springback margin; the circular arcs of the rolling upper die forming block and the circular arcs of the riveting upper die forming block are respectively provided with a third roundness rebound allowance, and the circular arcs of the riveting lower die forming block are respectively provided with a fourth roundness rebound allowance.

3. The continuous molding device for processing a micro-motor housing according to claim 1, wherein the first pressing arc punch set, the first lower die molding block, the second pressing arc punch set, the second lower die molding block, the third pressing arc punch set, the third lower die molding block, the fourth pressing arc punch set, the fourth lower die molding block, the winding circle lower die molding block, the riveting upper die molding block and the riveting lower die molding block are provided with fillets at the edges of the parts contacting the product.

4. The continuous molding device for processing a micro-motor housing according to claim 1, wherein the width of the first arc pressing punch set is larger than the projection length of the rolled product on the lower die at the first arc pressing station, the width of the second arc pressing punch set is larger than the projection length of the rolled product on the lower die at the second arc pressing station, the width of the third arc pressing punch set is larger than the projection length of the rolled product on the lower die at the third arc pressing station, and the width of the fourth arc pressing punch set is larger than the projection length of the rolled product on the lower die at the fourth arc pressing station.

5. The continuous molding device for processing the shell of the micro-motor according to claim 1, wherein milling grooves are respectively arranged on two sides of the first lower mold molding block, the second lower mold molding block, the third lower mold molding block and the fourth lower mold molding block, and the width and the depth of each milling groove are at least 2 mm larger than those of the product on the same station and the corresponding arc pressing punch set.

6. The continuous molding apparatus for processing a micro-machine housing according to claim 1, wherein the idle station includes a support column for preventing deformation of a product, the support column being provided on the upper die, and a fifth lower die molding block provided on the lower die.

7. The continuous forming device for processing the shell of the micro-motor according to claim 1, wherein the floating core pulling structure comprises a limiting profiling block and a floatable core rod, the limiting profiling block and the core rod are oppositely arranged at two sides of the lower die, and the core rod is penetrated between the upper die and the lower die and is erected on the limiting profiling block when horizontally extending.

8. The continuous molding device for processing the shell of the micro-motor according to claim 7, wherein the core rod is arranged on the limiting profiling block in a penetrating manner in a molded rolled product, and the diameter of the core rod is smaller than that of the molded rolled product.

9. A continuous molding process for processing a micro-motor housing, characterized by comprising the steps of using the continuous molding apparatus for processing a micro-motor housing according to any one of claims 1 to 8 to perform:

the first time of pre-bending: respectively rounding two ends of a product to form a first radian and a second radian which are used for overlapping and buckling the two ends when the product is rolled up at last, and simultaneously rounding a non-rounded part in the middle of the product to form a third radian, wherein the first radian, the second radian and the third radian are smaller than 90 degrees;

second pre-bending: the product advances along with the material belt, and a part of the product, which is not pressed with a circle, is pressed with a circle at one end close to a first radian of the pressed circle, a fourth radian, and a fifth radian at one end close to a second radian of the pressed circle, wherein the fourth radian and the fifth radian are smaller than 90 degrees;

third pre-bending: the product advances along with the material belt, and the two ends of the non-round pressing part in the middle of the product are respectively pressed to a sixth radian with the round pressing size smaller than 90 degrees;

fourth pre-bending: the product advances along with the material belt, and the two ends of the non-round pressing part in the middle of the product are respectively pressed with a seventh radian with the round pressing size smaller than 90 degrees;

and (3) rolling: the product enters an empty station along with a material belt for adjustment and transition, then enters a rolling station for rolling, at the moment, the two ends of a part, which is not pressed round, of the middle part of the product are respectively pressed into an eighth radian with the round size smaller than 90 degrees, then the two ends of the first radian and the second radian of the pressed round of the product are overlapped and buckled by utilizing a material guiding structure, and the rolling is completed, wherein the rolling and the rolling are adjusted by utilizing a floating loose core mode;

riveting and shaping: and (3) riveting and shaping the product after the rolling step, wherein the riveting and shaping are performed by adopting a floating core pulling mode, and finally, cutting off the strip point, rolling out the product, and finishing the processing.