Step-by-step blanking and step-by-step stamping integrated equipment for long-strip-shaped stainless steel sheet

Abstract

The utility model discloses a step-by-step blanking and step-by-step stamping integrated device for a long-strip-shaped stainless steel sheet, and relates to the technical field of tweezers processing equipment.According to the step-by-step blanking and step-by-step stamping integrated device for the long-strip-shaped stainless steel sheet, the whole device is arranged to be in a U shape, and the whole device is transferred through a first transferring mechanism; compared with the existing step-by-step work of blanking and bending, the continuous and uninterrupted work can be realized, the efficiency is improved, the occupied space of equipment is reasonably arranged, the stress of a material in the deformation process can be dispersed through multiple times of punching, stress concentration is reduced, cracks caused by excessive strain are avoided, and the product quality is improved. Multiple times of stamping allow more accurate control of the strain rate of each time of stamping, improvement of material plasticity and reduction of damage accumulation are facilitated, the problem of product forming cracking in the prior art is solved, and the product forming quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tweezers processing equipment, in particular to a device for integrating step-by-step blanking and step-by-step stamping of a long strip stainless steel sheet. Background Art

[0002] like Fig.14 As shown, the tweezers include two handles, wherein the production of the handles includes punching, cutting, bending, and subsequent silicone injection molding of a long strip. Fig.10 As shown, in order to facilitate subsequent bending, assembly and use, the stainless steel sheet strip needs to be punched (punched and cut). The punching parts include rivet punching holes, circular punching holes, several positioning punching holes and cutting surfaces, and the cutting surface of the long strip is arc-shaped. In order to facilitate bending and precise injection of silicone, positioning punching holes are opened on the strip, so a punching mold is needed. After punching, a stamping and bending mold is also needed for bending.

[0003] Existing punching and bending are usually done separately. After the stainless steel sheet is punched into a semi-finished handle, it needs to be collected and transported to the bending equipment for bending processing. The processing efficiency is low, and the punching and bending are both processed in one time, although the efficiency is high.

[0004] However, for stamping and bending, the product is prone to cracking during a single stamping and bending along the length direction of the handle of the long strip semi-finished product, affecting product quality; for punching, the minimum distance between two of the positioning punches (the first positioning punch and the second positioning punch) and the circular punch and the cutting surface on the handle of this product is less than 8mm. The lower die of the current punching die is usually provided with continuous punching holes corresponding to the punching positions, and the punching and cutting of the handle are achieved through a single punching. Therefore, the wall thickness of the adjacent punching holes corresponding to the first positioning punch, the second positioning punch, the circular punch and the cutting surface on the existing lower die will be less than 8mm. When the wall thickness of two adjacent concave dies is less than 8mm, the tension on the concave die cannot be eliminated, so that the concave die is prone to cracking. Therefore, the concave die needs to be replaced frequently, increasing production costs. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the utility model provides an integrated device for step-by-step blanking and step-by-step stamping of long stainless steel sheets, so as to solve the problems that the existing punching and stamping bending step-by-step work efficiency is low, the die is easily broken during one punching, which increases the production cost, and the semi-finished handle is easily cracked during one stamping.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a device for step-by-step blanking and step-by-step stamping of a long stainless steel sheet, comprising:

[0007] The punching mechanism is used for punching and cutting the stainless steel sheet to form a semi-finished handle, comprising a first lower die set and a first upper die set, wherein the top surface of the first lower die set is provided with at least one group of punching groups along its length direction, each group of the punching groups comprises a plurality of punching holes, and the wall thickness between two adjacent punching holes is not less than 8 mm, the first upper die set is located directly above the first lower die set, and the first upper die set is provided with a punching piece adapted and corresponding to the punching hole;

[0008] The punching mechanism comprises a second lower die set and a second upper die set, wherein the second lower die set comprises a plurality of second lower dies which are linearly and equidistantly distributed, and the top surface of each second lower die is provided with a long strip-shaped protrusion along its length direction, and the top surface of the protrusion is bent downward from the middle position to the edges around, and the distance from the highest point of the protrusion on each of the second lower dies which are linearly and equidistantly distributed to the top surface of the second lower die gradually increases, and at least two of the second lower dies have bending grooves on their top surfaces along their width direction, and the second upper die set comprises a plurality of second upper dies which are linearly and equidistantly distributed, and each of the second upper dies is correspondingly located directly above the second lower die, and each second upper die directly above the second lower die is provided with a recessed portion adapted to the protrusion, and the bottom surface of the second upper die corresponding to the second lower die with the bending groove is provided with a protrusion;

[0009] The first transfer mechanism is used to transfer the semi-finished handle to the second lower mold where the distance between the highest point of the protrusion and the top surface of the second lower mold is the smallest;

[0010] The second transfer mechanism is used to sequentially transfer the semi-finished handle on the second lower mold where the distance between the highest point of the protrusion and the top surface of the second lower mold is the smallest, to the remaining second lower molds;

[0011] A driving mechanism, used for driving the first upper die set and the second upper die set to synchronously move toward or away from the first lower die set and the second lower die set;

[0012] The punching mechanism and the stamping mechanism are arranged in parallel, and the punching mechanism, the stamping mechanism and the first transfer mechanism are in a U shape.

[0013] Preferably, there are 5 to 9 second lower molds, and the distance from the highest point of the protrusions on each of the second lower molds distributed linearly and equidistantly to the top surface of the second lower mold gradually increases by 0.4 mm to 0.7 mm.

[0014] Preferably, there are four bending grooves, which are divided into two groups. The depths of the two groups of bending grooves are 0.8mm-1mm and 3.5mm-3.7mm respectively, and the angles between the two groups of bending grooves and the horizontal plane are 3°-4° and 8°-9°.

[0015] Preferably, a limiting unit is provided on the opposite surface of the second lower mold and the second upper mold, and the limiting unit includes a plurality of limiting columns fixed on the bottom surface of the second lower mold and a limiting opening opened on the top surface of the second upper mold and facing the limiting columns.

[0016] Preferably, the first lower mold assembly includes an adjacent first lower mold unit and a second lower mold unit, the punching holes include a cutting hole, a circular hanging hole, a first positioning hole and a second positioning hole, the circular hanging hole and the first positioning hole are located on the first lower mold unit, and the cutting hole and the second positioning hole are located on the second lower mold unit.

[0017] Preferably, the punching hole also includes a third positioning hole, a fourth positioning hole, a fifth positioning hole and a rivet hole, the third positioning hole, the fourth positioning hole and the fifth positioning hole start from the top surface of the first lower mold unit in sequence along the length direction of the first lower mold unit, the rivet hole is located on the second lower mold unit, the third positioning hole, the fourth positioning hole and the fifth positioning hole are located between the circular hanging hole and the first positioning hole, and the rivet hole is located between the second positioning hole and the cutting hole.

[0018] Preferably, a limiting mechanism is provided on the facing surfaces of the first lower die group and the first upper die group, the limiting mechanism includes a first limiting assembly, the first limiting assembly includes several groups of limiting parts and limiting holes, each group of the limiting parts includes two limiting rods, the limiting rods are provided on the top surface of the first lower die group, annular grooves are provided on the periphery of the limiting rods, the distance between the annular grooves is adapted to the width of the stainless steel sheet material strip, and a limiting hole adapted to the limiting rods is provided on the bottom surface of the first upper die group.

[0019] Preferably, the limiting mechanism also includes a second limiting assembly, which includes a plurality of limiting blocks and limiting grooves. The limiting blocks are arranged on the bottom surface of the first upper mold group along the conveying direction of the stainless steel sheet. The limiting blocks are provided with grooves matching the width of the stainless steel sheet material strip, and the top surface of the first lower mold group is provided with limiting grooves matching the limiting blocks.

[0020] Preferably, a three-in-one feeder is further included, and a feed guide plate and a discharge plate are respectively provided on opposite sides of the first lower die set, and the feed guide plate is located between the three-in-one feeder and the first lower die set.

[0021] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0022] The utility model sets the overall device in a U-shape, and realizes continuous and uninterrupted operation through the transportation of the first transportation mechanism. Compared with the existing punching and bending step-by-step work, it not only improves the efficiency, but also reasonably arranges the space occupied by the equipment. By performing stamping multiple times, the stress of the material in the deformation process can be dispersed, stress concentration can be reduced, and cracks caused by excessive strain can be avoided. Multiple stamping allows more accurate control of the strain rate of each stamping, which helps to improve the plasticity of the material and reduce damage accumulation, solve the problem of product molding cracking in the prior art, and improve the product molding quality. By setting the wall thickness of each punching hole to be greater than 8mm, the existing single punching is changed to a step-by-step punching work, which can avoid the problem of the tension that cannot be eliminated due to the excessively small wall thickness of two adjacent punching holes in the existing single punching and cutting process, thereby avoiding the first lower die set from being broken during punching and cutting, thereby avoiding people from frequently replacing the first lower die set, and achieving the purpose of saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 It is a schematic diagram of the structure of the driving mechanism and the blanking mechanism of the utility model;

[0025] Figure 3 It is a schematic diagram of the structure of the driving mechanism and the stamping mechanism of the utility model;

[0026] Figure 4 This is a schematic diagram of the second lower mold structure of the utility model;

[0027] Figure 5 This is a schematic diagram of the second upper mold structure of the utility model;

[0028] Figure 6 This is a schematic diagram of the first lower die set and the punching hole structure in the first embodiment of the utility model;

[0029] Figure 7 This is a schematic diagram of the structure of the first upper module in the first embodiment of the utility model;

[0030] Figure 8 This is a schematic diagram of the structure of the punching piece and the limit block of the utility model;

[0031] Fig. 9 This is a schematic diagram of the structure of the limit rod and the annular groove of the utility model;

[0032] Fig.10 This is a schematic diagram of the structure of the stainless steel sheet material strip before processing and the semi-finished handle portion after processing of the utility model;

[0033] Fig.11This is a schematic diagram of a pair of stainless steel sheet material strip punching and cutting variation structures in an embodiment of the utility model;

[0034] Fig.12 This is a schematic diagram of the punching and cutting variation structure of the stainless steel sheet strip in the second embodiment of the utility model;

[0035] Fig.13 This is a schematic diagram of the seven-time molding change structure of the handle portion of the utility model;

[0036] Fig.14 This is a schematic diagram of the structure of the tweezers of the utility model;

[0037] Among them: 1. First lower die set; 101. First lower die unit; 102. Second lower die unit; 2. Punching hole; 21. First positioning hole; 22. Second positioning hole; 23. Third positioning hole; 24. Fourth positioning hole; 25. Fifth positioning hole; 26. Round hanging hole; 27. Rivet hole; 28. Cutting hole; 3. First upper die set; 4. Punching piece; 41. First punching rod; 42. Second punching rod; 43. Punching block; 5. Second lower die; 51. Raised portion; 52, bending groove; 53, limiting column; 6, limiting mechanism; 61, limiting groove; 62, limiting rod; 621, annular groove; 63, limiting block; 64, limiting hole; 7, driving mechanism; 71, driving member; 72, transverse plate; 8, supporting plate; 9, second upper mold; 91, recessed portion; 92, protruding portion; 93, limiting opening; 10, first transfer mechanism; 11, supporting rod; 12, material taking assembly; 13, feed guide plate; 14, discharge plate. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments. However, the following embodiments are only preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments are conventional methods unless otherwise specified. The materials, reagents, etc. used in the following embodiments are all commercially available unless otherwise specified.

[0039] like Figure 1-Figure 13 As shown, the utility model provides a device for step-by-step punching and step-by-step stamping of a long stainless steel sheet, which is used for punching and cutting the stainless steel sheet to form a semi-finished handle (such as Fig. 9 ), and then the semi-finished handle is stamped and bent (as shown in Fig.12As shown), there are a plurality of punching places on the semi-finished handle, and the minimum distance between at least two adjacent punching places is less than 8 mm. The device includes a punching mechanism, a punching mechanism, a first transfer mechanism 10, a second transfer mechanism and a driving mechanism 7;

[0040] like Figure 2 , Figure 6 , Figure 7 , Figure 8 and Fig.10 As shown, the punching mechanism is used for punching and cutting the stainless steel sheet to form a semi-finished handle, comprising a first lower die set 1 and a first upper die set 3. The top surface of the first lower die set 1 is provided with at least one group of punching groups along its length direction. Each group of punching groups includes a plurality of punching holes 2. The wall thickness between two adjacent punching holes 2 is not less than 8 mm. The first upper die set 3 is located directly above the first lower die set 1. The first upper die set 3 is provided with a punching piece 4 adapted and corresponding to the punching hole 2.

[0041] Two sets of punching groups are arranged here in parallel and symmetrically on the first lower die set 1. The specific punching parts 4 include a second punching rod 42, a punching block 43 and a plurality of first punching rods 41. The first punching rods 41 are adapted to each positioning hole and the number corresponds. The second punching rods 42 are adapted to the circular hanging holes 26 and the number corresponds. The punching block 43 is used to cut the stainless steel sheet material strip.

[0042] like Figure 3 , Figure 4 , Figure 5 and Fig.13 As shown, the stamping mechanism includes a second lower die set and a second upper die set, the second lower die set includes a plurality of second lower dies 5 that are linearly and equidistantly distributed, each second lower die 5 has a top surface provided with a long strip-shaped protrusion 51 along its length direction, the top surface of the protrusion 51 is bent downward from the middle position to the edges around, the distance from the highest point of the protrusion 51 on each of the linearly and equidistantly distributed second lower dies 5 to the top surface of the second lower die 5 gradually increases, at least two second lower dies 5 have a bending groove 52 on their top surfaces along their width direction, the second upper die set includes a plurality of linear The second upper molds 9 are equidistantly distributed, and each second upper mold 9 is correspondingly located directly above the second lower mold 5. The second upper mold 9 directly above each second lower mold 5 is provided with a recessed portion 91 adapted to the raised portion 51, and the bottom surface of the second upper mold 9 corresponding to the second lower mold 5 directly above the second lower mold 5 with the bending groove 52 is provided with a protruding portion 92; (the specific arrangement of the protruding portion 51, the recessed portion 91, the bending groove 52 and the protruding portion 92 is arranged according to the shape of the semi-finished handle portion to be formed), and the first lower mold set 1 and the second lower mold 5 are both supported by a support plate 8;

[0043] Since the semi-finished handle is in the shape of a long strip, it is prone to cracking when it is bent along its length at one time. The stamping mechanism of the equipment can disperse the stress of the material during the deformation process by stamping in multiple times, reduce stress concentration and avoid cracks caused by excessive strain. Multiple stamping allows more precise control of the strain rate of each stamping, which helps to improve the plasticity of the material and reduce damage accumulation, solve the problem of product molding cracking in the existing technology, and improve the product molding quality.

[0044] like Figure 1-Figure 3 As shown, the first transfer mechanism 10 is used to transfer the semi-finished handle to the second lower mold 5 where the distance between the highest point of the protrusion 51 and the top surface of the second lower mold 5 is the smallest;

[0045] The first transfer mechanism 10 here includes a horizontal drive structure (which can use a cylinder), a vertical drive structure (which can use a cylinder), (the subsequent rotational drive structure, which can optionally use a motor) and an adsorption structure (specifically, it can be the same as the material picking component 12, both are set as suction cups). After the cut semi-finished handle is adsorbed by the adsorption structure, the horizontal drive structure, the vertical drive structure, and the subsequent rotational drive structure cooperate to automatically transfer the semi-finished handle to the second lower mold 5 where the distance from the highest point of the protrusion 51 to the top surface of the second lower mold 5 is the smallest.

[0046] like Figure 1 and Figure 3 As shown, the second transfer mechanism is used to sequentially transfer the semi-finished handle on the second lower mold 5 where the highest point of the protrusion 51 has the smallest distance to the top surface of the second lower mold 5 to the remaining second lower molds 5;

[0047] Specifically, the second transfer mechanism includes a robotic arm (the specific structure is not shown in the figure), a support rod 11 and a material picking assembly 12. A number of material picking assemblies 12 are linearly and equidistantly distributed on the support rod 11 (suction cups can be used to adsorb the semi-finished handles). The number of material picking assemblies 12 arranged here corresponds to the number of second lower molds 5, so that the semi-finished handles on each second lower mold 5 can be synchronously transferred to the next second lower mold 5 in turn (the figure shows transfer from right to left). The second transfer mechanism is a relatively conventional driving principle and will not be elaborated here.

[0048] like Figure 1-Figure 3 As shown, the driving mechanism 7 is used to drive the first upper die set 3 and the second upper die set to move synchronously toward or away from the first lower die set 1 and the second lower die set;

[0049] Specifically, the driving mechanism 7 includes a driving member 71 (which can be set as a cylinder here) and a cross plate 72. The output end of the driving member 71 is fixedly connected to the cross plate 72. The first upper mold group 3 and the second upper mold group are arranged on the bottom surface of the cross plate 72, so that the driving mechanism 7 can drive the first upper mold group 3 and the second upper mold group to move synchronously, and then can synchronously realize the punching, cutting and stamping of the stainless steel sheet and the semi-finished handle.

[0050] like Figure 1 As shown, the punching mechanism and the punching mechanism are arranged in parallel, and the punching mechanism, the punching mechanism and the first transfer mechanism 10 are in a U shape;

[0051] By setting the overall configuration to be U-shaped and transporting by the first transport mechanism 10, continuous and uninterrupted operation can be achieved. Compared with the existing step-by-step work of punching and bending, it not only improves efficiency but also reasonably arranges the space occupied by the equipment.

[0052] like Figure 3 As shown, there are 5 to 9 second lower molds 5, and the distance from the highest point of the protrusions 51 on each second lower mold 5 distributed linearly and equidistantly to the top surface of the second lower mold 5 gradually increases by 0.4 mm to 0.7 mm (as shown in 3, from right to left, the specific change of each protrusion 51 is very small, so each second lower mold 5 is not fully shown, only Figure 4 Show one);

[0053] The total bending depth is about 3.5 mm. When the number of the second lower molds 5 is less than 5, the bending depth will increase by more than 0.7 mm each time, which will easily cause cracks. When the number of the second lower molds 5 is greater than 9, the mold cost will increase.

[0054] like Figure 1-Figure 4 As shown, here, 7 second lower molds 5 are taken as an example, and the distance from the highest point of the protrusion 51 on each second lower mold 5 that is linearly and equidistantly distributed to the top surface of the second lower mold 5 gradually increases by 0.5 mm. In conjunction with the punching method of the subsequent embodiment 1, at this time, each second lower mold 5 is vertically arranged to the first lower mold group 1. Therefore, after the first transfer mechanism 10 grabs the semi-finished handle on the discharge plate 14, it needs to select it at ninety degrees and then transfer it to the second lower mold 5 where the distance from the highest point of the protrusion 51 to the top surface of the second lower mold 5 is the smallest.

[0055] like Figure 3 , Figure 4 and Fig.13 As shown, there are four bending grooves 52, which are divided into two groups. The depths of the two groups of bending grooves 52 are 0.8mm-1mm and 3.5mm-3.7mm respectively. The angles between the two groups of bending grooves 52 and the horizontal plane are 3°-4° (such as Fig.13 A) and 8°-9° (as shown Fig.13B) shown;

[0056] When 7 second lower dies 5 are set here, the depth of the bending groove 52 of the fourth and fifth second lower dies 5 is set to 0.9 mm, the depth of the bending groove 52 of the sixth and seventh second lower dies 5 is set to 3.68 mm, the bending grooves 52 of the fourth and sixth second lower dies 5 are both pre-pressing stations, and the bending grooves 52 of the fifth and sixth second lower dies 5 ensure that the predetermined stamping and bending effect can be achieved.

[0057] like Figure 4 and Figure 5 As shown, a limiting unit is provided on a surface facing the second lower mold 5 and the second upper mold 9, and the limiting unit includes a plurality of limiting columns 53 fixed on the bottom surface of the second lower mold 5 and a limiting opening 93 opened on the top surface of the second upper mold 9 and facing the limiting columns 53;

[0058] By setting the limit column 53, the semi-finished handle can be positioned and placed, so as to facilitate the subsequent precise stamping work. By setting the limit opening 93, when the driving mechanism 7 drives the second upper mold 9 to move downward, the limit column 53 can enter the limit opening 93 to ensure the normal mold closing and stamping of the second lower mold 5 and the second upper mold 9.

[0059] When the stainless steel sheet strip is punched (punched and cut) by the punching mechanism, the punching part includes a rivet punching hole, a circular punching hole, a plurality of positioning punching holes (including a first positioning punching hole, a second positioning punching hole, a third positioning punching hole, a fourth positioning punching hole and a fifth positioning punching hole) and an arc-shaped cutting surface (such as Fig.10 shown);

[0060] Here, the length of the stainless steel sheet strip conveyed by the three-in-one feeder is set to 274mm each time (this length is the length of the semi-finished product handle plus the length of the cut waste, that is, Fig.10 Before processing, the semi-finished handle is Fig.10 After the processing shown in the figure), the following are two examples of punching methods:

[0061] Embodiment 1:

[0062] The first lower die set 1 includes adjacent first lower die units 101 and second lower die units 102 (the device requires a longer first lower die set 1 due to the increased number of punching times. To facilitate the production and transportation of the first lower die set 1, the first lower die unit 101 and the second lower die unit 102 are combined here). The punching hole 2 includes a cutting hole 28, a circular hanging hole 26, a first positioning hole 21 and a second positioning hole 22. The circular hanging hole 26 and the first positioning hole 21 are located on the first lower die unit 101, and the cutting hole 28 and the second positioning hole 22 are located on the second lower die unit 102;

[0063] The punching hole 2 further includes a third positioning hole 23, a fourth positioning hole 24, a fifth positioning hole 25 and a rivet hole 27. The third positioning hole 23, the fourth positioning hole 24 and the fifth positioning hole 25 start from the top surface of the first lower mold unit 101 in sequence along the length direction of the first lower mold unit 101. The rivet hole 27 is located on the second lower mold unit 102. The third positioning hole 23, the fourth positioning hole 24 and the fifth positioning hole 25 are located between the circular hanging hole 26 and the first positioning hole 21. The rivet hole 27 is located between the second positioning hole 22 and the cutting hole 28.

[0064] Since the minimum distance between the first positioning punching hole and the second positioning punching hole and between the circular punching hole and the cutting surface of the semi-finished handle after processing is less than 8mm, four punchings and one cutting are performed here. Fig.11 As shown, (for the convenience of display, the figure here is from top to bottom, and the dotted lines in the figure are the punching and cutting points each time);

[0065] Specifically, Figure 2 , Figure 6 and Fig.11 As shown, the material strip is fed by the three-in-one feeder to the first lower die unit 101, and when the first positioning punching hole to be opened is aligned with the first positioning hole 21, the driving mechanism 7 is adjusted to drive the first upper die set 3 to move downward, so that a first punching rod 41 processes the first positioning hole 21 in the material strip, thereby realizing the first punching;

[0066] After that, the material strip is fed 274 mm by the three-in-one feeder. At this time, the third positioning punching hole, the fourth positioning punching hole and the fifth positioning punching hole correspond to the third positioning hole 23, the fourth positioning hole 24 and the fifth positioning hole 25 respectively. By adjusting the driving mechanism 7, it drives the first upper die set 3 to move downward, so that the three first punching rods 41 process the third positioning hole 23, the fourth positioning hole 24 and the fifth positioning hole 25 in the material strip, realizing the second punching. At the same time, the subsequent material strips are synchronously punched for the first time.

[0067] Then the material strip continues to be fed by the three-in-one feeder for 274 mm. At this time, the circular hanging hole 26 and the second positioning hole 22 correspond to the circular punching hole and the second positioning punching hole respectively. By adjusting the driving mechanism 7, it drives the first upper die set 3 to move downward, so that a second punching rod 42 and a first punching rod 41 process the circular hanging hole 26 and the second positioning hole 22 on the material strip, realizing the third punching. At the same time, the subsequent material strips are synchronously punched for the first and second punching operations;

[0068] Then, the material strip is fed 274 mm by the three-in-one feeder. At this time, the rivet holes 27 (two are provided here) correspond to the rivet punching holes. By adjusting the driving mechanism 7, the first upper die set 3 is driven to move downward, so that the first punching rod 41 processes the rivet punching holes on the material strip, realizing the fourth punching. At the same time, the subsequent material strips are punched for the first, second and third times simultaneously.

[0069] Finally, the material strip is fed 274 mm by the three-in-one feeder. At this time, one side of the cutting hole 28 is adapted to correspond to the cutting surface. By adjusting the driving mechanism 7, it drives the first upper die set 3 to move downward, so that the punching block 43 cuts the material strip. At the same time, the subsequent material strips are punched for the first time, the second time, the third time and the fourth time synchronously.

[0070] Subsequently, the material strip is fed 274 mm each time through the three-in-one feeding mechanism, thereby realizing continuous and uninterrupted production and processing of the semi-finished handles. Moreover, through this equipment, although it is longer than the existing processing mold, the wall thickness of each punching hole 2 on the first lower mold group 1 can be made greater than 8 mm, and the step-by-step continuous and uninterrupted punching work can be realized, thereby avoiding the existing problem that the tension cannot be eliminated due to the small wall thickness of two adjacent punching holes 2 during one punching and cutting process, thereby avoiding the first lower mold group 1 from being broken during punching and cutting.

[0071] It should be noted that before each conveyance of the material strip, the driving mechanism 7 is adjusted to drive the first upper die set 3 to move upward.

[0072] Embodiment 2:

[0073] like Fig.12 As shown, there are two punching and one cutting here (for the convenience of display, the figure here is from top to bottom), and the specific mold diagram is not drawn;

[0074] Specifically, when the three-in-one feeder conveys the material strip to the first lower die set 1, and the first positioning punch hole, the third positioning punch hole, the fourth positioning punch hole and the fifth positioning punch hole correspond to the first positioning hole 21, the third positioning hole 23, the fourth positioning hole 24 and the fifth positioning hole 25 respectively, the driving mechanism 7 is adjusted to drive the first upper die set 3 to move downward, so that the four first punching rods 41 process the material strip into the first positioning hole 21, the third positioning hole 23, the fourth positioning hole 24 and the fifth positioning hole 25, thereby realizing the first punching;

[0075] After that, the material strip is fed 274 mm by the three-in-one feeder. At this time, the circular hanging hole 26, the second positioning hole 22 and the rivet hole 27 (two are provided here) correspond to the circular punching hole, the second positioning punching hole and the rivet punching hole respectively. By adjusting the driving mechanism 7, it drives the first upper die set 3 to move downward, so that the first punching rod 41 and the second punching rod 42 process the material strip into the second positioning hole 22, the rivet hole 27 and the circular hanging hole 26, and realize the second punching. At the same time, the subsequent material strips are synchronously punched for the first time.

[0076] Finally, the material strip is fed 274 mm by the three-in-one feeder. At this time, one side of the cutting hole 28 is adapted to correspond to the cutting surface. By adjusting the driving mechanism 7, it drives the first upper die set 3 to move downward, so that the punching block 43 cuts the material strip. At the same time, the subsequent material strips are punched for the first time and the second time synchronously.

[0077] The specific punching times and methods are not described in detail here. It is only necessary to ensure that the wall thickness between adjacent punching holes 2 on the first lower module 1 is not less than 8 mm.

[0078] like Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, a limiting mechanism 6 is provided on the surface facing the first lower die set 1 and the first upper die set 3, and the limiting mechanism 6 includes a first limiting assembly, and the first limiting assembly includes a plurality of groups of limiting parts and limiting holes 64, each group of limiting parts includes two limiting rods 62, and the limiting rods 62 are provided on the top surface of the first lower die set 1, and annular grooves 621 are provided on the periphery of the limiting rods 62, and the distance between the annular grooves 621 is adapted to the width of the material strip, and the bottom surface of the first upper die set 3 is provided with limiting holes 64 adapted to the limiting rods 62 for accommodating the limiting rods 62;

[0079] By providing a limiting rod 62 with an annular groove 621, since the distance between the annular grooves 621 is adapted to the width of the material belt, the material belt can be conveyed between the two annular grooves 621, thereby ensuring stable conveyance of the material belt and preventing left and right deviation when the three-in-one feeder feeds the material.

[0080] like Figure 6 , Figure 7 and Figure 8 As shown, the limiting mechanism 6 also includes a second limiting assembly, which includes a plurality of limiting blocks 63 and limiting grooves 61. The limiting blocks 63 are arranged on the bottom surface of the first upper die set 3 along the conveying direction of the stainless steel sheet. The limiting blocks 63 are provided with grooves adapted to the width of the material strip, and the top surface of the first lower die set 1 is provided with limiting grooves 61 adapted to the limiting blocks 63.

[0081] When there are two groups of punching holes 2 here, two corresponding grooves are also provided. When the driving mechanism 7 drives the first upper mold group 3 to move downward, the first upper mold group 3 drives the limit block 63 to move, and the groove on the limit block 63 limits the material strip, thereby ensuring that subsequent punching can be more precise, and further preventing the material strip from shifting left and right when punching the material strip.

[0082] like Figure 2 As shown, it also includes a three-in-one feeder, and a feed guide plate 13 and a discharge plate 14 are respectively provided on opposite sides of the first lower die set 1, and the feed guide plate 13 is located between the three-in-one feeder and the first lower die set 1;

[0083] The three-in-one feeder is used to convey stainless steel thin plates (the three-in-one feeder refers to a stainless steel coil rack, a flattening machine and a feeder, which is a common equipment in stamping equipment, not shown in the figure, and the specific principle will not be elaborated on). By setting the feed guide plate 13, the thin plate material strip can be stably conveyed in the feed channel, and by setting the discharge plate 14, after the thin plate material strip is cut to obtain a semi-finished handle, the semi-finished handle can be conveniently transferred to the second lower mold 5 where the distance from the highest point of the protrusion 51 to the top surface of the second lower mold 5 is the smallest through the first transfer mechanism 10.

[0084] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for step-by-step blanking and step-by-step stamping of long stainless steel sheets, characterized in that: include: A punching mechanism, used for punching and cutting a stainless steel sheet to form a semi-finished handle, comprising a first lower die set (1) and a first upper die set (3), wherein the top surface of the first lower die set (1) is provided with at least one punching group along its length direction, each punching group comprising a plurality of punching holes (2), the wall thickness between two adjacent punching holes (2) being not less than 8 mm, the first upper die set (3) being located directly above the first lower die set (1), and the first upper die set (3) being provided with a punching piece (4) adapted to and corresponding to the punching hole (2); The punching mechanism comprises a second lower die set and a second upper die set, wherein the second lower die set comprises a plurality of second lower dies (5) which are linearly and equidistantly distributed, wherein the top surface of each second lower die (5) is provided with a long strip-shaped raised portion (51) along its length direction, wherein the top surface of the raised portion (51) is bent downward from the middle position to the edges on all sides, and the distance from the highest point of the raised portion (51) on each of the linearly and equidistantly distributed second lower dies (5) to the top surface of the second lower die (5) gradually increases, and at least two of the second lower dies (5) are provided with a plurality of second lower dies (5) which are linearly and equidistantly distributed. The top surface of the lower mold (5) is provided with a bending groove (52) along its width direction; the second upper mold group comprises a plurality of second upper molds (9) which are linearly and equidistantly distributed; each of the second upper molds (9) is located directly above the second lower mold (5); the second upper mold (9) directly above each second lower mold (5) is provided with a recessed portion (91) adapted to the raised portion (51); and the bottom surface of the second upper mold (9) corresponding to the second lower mold (5) having the bending groove (52) is provided with a raised portion (92); A first transfer mechanism (10) is used to transfer the semi-finished handle to the second lower mold (5) where the distance between the highest point of the protrusion (51) and the top surface of the second lower mold (5) is the smallest; A second transfer mechanism is used to sequentially transfer the semi-finished handle on the second lower mold (5) with the smallest distance between the highest point of the protrusion (51) and the top surface of the second lower mold (5) to the remaining second lower molds (5); A driving mechanism (7) for driving the first upper die set (3) and the second upper die set to move synchronously toward or away from the first lower die set (1) and the second lower die set; The punching mechanism and the stamping mechanism are arranged in parallel, and the punching mechanism, the stamping mechanism and the first transfer mechanism (10) are in a U shape.

2. The device for integrating step-by-step blanking and step-by-step punching of a long stainless steel sheet according to claim 1 is characterized in that: There are 5 to 9 second lower molds (5), which are linearly and equidistantly distributed, and the distance from the highest point of the protrusions (51) on each of the second lower molds (5) to the top surface of the second lower mold (5) gradually increases by 0.4 mm to 0.7 mm.

3. The device for integrated step-by-step blanking and step-by-step punching of long stainless steel sheets according to claim 2, characterized in that: There are four bending grooves (52), which are divided into two groups. The depths of the two groups of bending grooves (52) are 0.8 mm-1 mm and 3.5 mm-3.7 mm respectively. The angles between the two groups of bending grooves (52) and the horizontal plane are 3°-4° and 8°-9°.

4. The device for step-by-step blanking and step-by-step punching of a long stainless steel sheet according to claim 1, characterized in that: A limiting unit is provided on a surface directly facing the second lower mold (5) and the second upper mold (9), and the limiting unit comprises a plurality of limiting columns (53) fixed on the bottom surface of the second lower mold (5) and a limiting opening (93) opened on the top surface of the second upper mold (9) and directly facing the limiting columns (53).

5. The device for integrated step-by-step blanking and step-by-step punching of long stainless steel sheets according to claim 1, characterized in that: The first lower mold assembly (1) comprises a first lower mold unit (101) and a second lower mold unit (102) which are adjacent to each other; the punching hole (2) comprises a cutting hole (28), a circular hanging hole (26), a first positioning hole (21) and a second positioning hole (22); the circular hanging hole (26) and the first positioning hole (21) are located on the first lower mold unit (101); and the cutting hole (28) and the second positioning hole (22) are located on the second lower mold unit (102).

6. The device for integrated step-by-step blanking and step-by-step punching of a long stainless steel sheet according to claim 5, characterized in that: The punching hole (2) further comprises a third positioning hole (23), a fourth positioning hole (24), a fifth positioning hole (25) and a rivet hole (27); the third positioning hole (23), the fourth positioning hole (24) and the fifth positioning hole (25) are sequentially arranged along the length direction of the first lower mold unit (101) starting from the top surface of the first lower mold unit (101); the rivet hole (27) is located on the second lower mold unit (102); the third positioning hole (23), the fourth positioning hole (24) and the fifth positioning hole (25) are located between the circular hanging hole (26) and the first positioning hole (21); and the rivet hole (27) is located between the second positioning hole (22) and the cutting hole (28).

7. The device for integrated step-by-step blanking and step-by-step punching of a long stainless steel sheet according to claim 6, characterized in that: A limiting mechanism (6) is provided on the surfaces facing each other of the first lower die group (1) and the first upper die group (3), and the limiting mechanism (6) comprises a first limiting assembly, and the first limiting assembly comprises a plurality of groups of limiting parts and limiting holes (64), and each group of the limiting parts comprises two limiting rods (62), and the limiting rods (62) are provided on the top surface of the first lower die group (1), and an annular groove (621) is provided on the periphery of the limiting rods (62), and the distance between the annular grooves (621) is adapted to the width of the stainless steel sheet material strip, and a limiting hole (64) adapted to the limiting rods (62) is provided on the bottom surface of the first upper die group (3).

8. The device for integrated step-by-step blanking and step-by-step punching of long stainless steel sheets according to claim 7, characterized in that: The limiting mechanism (6) also includes a second limiting assembly, which includes a plurality of limiting blocks (63) and limiting grooves (61). The limiting blocks (63) are arranged on the bottom surface of the first upper die assembly (3) along the conveying direction of the stainless steel sheet, and the limiting blocks (63) are provided with grooves adapted to the width of the stainless steel sheet strip. The top surface of the first lower die assembly (1) is provided with limiting grooves (61) adapted to the limiting blocks (63).

9. The device for step-by-step blanking and step-by-step punching of a long stainless steel sheet according to claim 1, characterized in that: It also comprises a three-in-one feeder, wherein a feed guide plate (13) and a discharge plate (14) are respectively provided on opposite sides of the first lower die set (1), and the feed guide plate (13) is located between the three-in-one feeder and the first lower die set (1).

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