Pre-blanking limiting device for iron core progressive die

Abstract

The utility model relates to a pre-blanking limiting device, in particular to an iron core progressive die pre-blanking limiting device which comprises a bearing plate. A lifting groove is formed in the bearing plate, and a positioning column is fixedly mounted in the lifting groove; a lifting table which is in sliding connection with the positioning column is mounted in the lifting groove in a sliding manner; a buffering mechanism is arranged on the bearing plate, and when the lifting table bears a material plate, the buffering mechanism can buffer and reduce the descending speed of the lifting table so as to reduce the descending speed of the material plate; the bearing plate is provided with an adjusting mechanism used for improving or reducing the buffering effect of the buffering mechanism. The descending speed and the descending distance of the lifting table are reduced through the buffering mechanism, so that the flitch does not make direct contact with the die after falling, die loss is avoided, the service life of the die is prolonged, and the production efficiency and the production cost can be effectively controlled. The adjusting mechanism can increase or decrease the buffering force of the buffering mechanism so as to decrease or increase the falling speed of the material plate and the lifting table.

Description

Technical Field

[0001] The utility model relates to a pre-blanking limiting device, in particular to a pre-blanking limiting device for an iron core progressive die. Background Art

[0002] A progressive die, also known as a continuous die, consists of multiple stations, each of which performs different operations in a sequence, completing a series of different stamping operations within a single press stroke. The working principle of a progressive die is to perform two or more stamping operations at different stations in a single press stroke. The material is moved by a feeder at a fixed step size, allowing multiple operations such as punching, blanking, bending, trimming, and drawing to be completed within a single die set.

[0003] Pre-blanking in progressive dies involves pre-blank-ing the material before the die is pressed. This allows for more precise control of the material's shape and size during the subsequent stamping process. This process typically utilizes a small pneumatic cylinder or other mechanical device to ensure the material is initially cut or positioned before entering the main stamping process, thereby improving the precision and efficiency of the final stamped product.

[0004] When a larger sheet material is processed with a progressive die, its weight is also larger. Therefore, if the sheet material is not limited and buffered during pre-blanking, the impact force generated by the falling sheet material will accelerate the wear of the progressive die, which is not conducive to the control of production efficiency and production costs. Utility Model Content

[0005] The purpose of the utility model is to provide a pre-blanking limiting device for an iron core progressive die to solve the problems raised in the above background technology.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A pre-blanking limiting device for an iron core progressive die comprises a receiving plate;

[0008] The receiving plate is provided with a plurality of lifting slots, wherein positioning columns are fixedly installed in the lifting slots; and a lifting platform slidably connected to the positioning columns is slidably installed in the lifting slots;

[0009] The receiving plate is provided with a buffer mechanism, and when the lifting platform receives the material plate, the buffer mechanism can buffer and reduce the descending speed of the lifting platform, so as to reduce the falling speed of the material plate;

[0010] The receiving plate is provided with an adjusting mechanism for increasing or decreasing the buffering effect of the buffering mechanism.

[0011] As described above, the pre-blanking limiting device for the progressive die of the core: a plurality of said lifting grooves are symmetrically arranged on the said receiving plate, two said lifting grooves arranged in the transverse direction of the receiving plate form a group, and two adjacent groups cooperate with each other.

[0012] The pre-blanking limiting device of the iron core progressive die as described above: the buffer mechanism includes an extrusion groove opened on the receiving plate and connected to the lifting groove, a slider is slidably engaged in the extrusion groove, an extrusion rod cooperating with the lifting platform is slidably engaged in the extrusion groove, and a spring fixedly connected to the extrusion rod is fixedly installed on the slider.

[0013] The iron core progressive die pre-blanking limiting device as described above: a side of the extrusion rod close to the lifting platform is set as an inclined surface, and a side of the lifting platform close to the extrusion rod is set as a sloped surface.

[0014] As described above, the pre-blanking limiting device for the progressive die of the core: the adjusting mechanism includes a slide groove provided on the receiving plate, the slide groove is connected to the extrusion groove, and a slide rod fixedly connected to the slider is slidably engaged in the slide groove.

[0015] The pre-blanking limiting device of the iron core progressive die as described above: the adjusting mechanism also includes an adjusting groove provided on the receiving plate, an internally threaded sleeve is slidably engaged in the adjusting groove, and the internally threaded sleeve is fixedly connected to the two sliding rods; a rotating shaft rotatably connected to the receiving plate is provided in the adjusting groove, and an externally threaded protrusion threadedly connected to the internally threaded sleeve is fixedly installed on the rotating shaft.

[0016] The iron core progressive die pre-blanking limiting device as described above: a knob block is fixedly mounted on the rotating shaft, and the surface friction coefficient of the knob block is relatively large.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the buffer mechanism reduces the descending speed and descending distance of the lifting platform, so that the material plate does not directly contact the mold after falling, thereby avoiding mold loss, increasing the service life of the mold, and effectively controlling production efficiency and production costs; the adjustment mechanism can increase or decrease the buffering force of the buffer mechanism to reduce or increase the falling speed of the material plate and the lifting platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of the pre-blanking limit device of the iron core progressive die.

[0019] Figure 2 This is a structural schematic diagram of the pre-blanking limit device of the core progressive die from another perspective.

[0020] Figure 3 This is a structural schematic diagram of the cross-sectional view of the pre-blanking limit device of the iron core progressive die.

[0021] Figure 4 for Figure 3 Schematic diagram of the structure at point A in the middle.

[0022] Figure 5 This is a structural schematic diagram of the pre-blanking limit device of the core progressive die from another cross-sectional perspective.

[0023] Figure 6 for Figure 5 Schematic diagram of the structure at point B.

[0024] Figure 7 This is a schematic diagram of the structure of the rotating shaft and sliding rod in the pre-blanking limiting device of the iron core progressive die.

[0025] Figure 8 This is a structural diagram of the lifting platform and extrusion rod in the pre-blanking limiting device of the iron core progressive die.

[0026] In the figure: 1, receiving plate; 101, lifting slot; 102, extrusion slot; 103, slide slot; 104, adjustment slot;

[0027] 2. Positioning column;

[0028] 3. Lifting platform;

[0029] 4. Extrusion rod

[0030] 5. Spring;

[0031] 6. Slider;

[0032] 7. Slider;

[0033] 8. Internal thread sleeve;

[0034] 9. Rotating shaft; 901. External thread protrusion; 902. Knob block. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] See also Figures 1 to 8 , as an embodiment of the present utility model, the core progressive die pre-blanking limiting device includes a receiving plate 1;

[0037] The receiving plate 1 is provided with a plurality of lifting slots 101, wherein positioning posts 2 are fixedly installed in the lifting slots 101; and a lifting platform 3 slidably connected to the positioning posts 2 is slidably installed in the lifting slots 101;

[0038] The receiving plate 1 is provided with a buffer mechanism. When the lifting platform 3 receives the material plate, the buffer mechanism can buffer and reduce the descending speed of the lifting platform 3 to reduce the falling speed of the material plate;

[0039] The receiving plate 1 is provided with an adjustment mechanism for increasing or decreasing the buffering effect of the buffer mechanism.

[0040] In this embodiment, a progressive die, also known as a continuous die, consists of multiple stations, each of which performs different operations in a sequential manner, completing a series of different stamping operations within a single press stroke. The progressive die operates by performing two or more stamping operations at different stations in a single press stroke. The material is moved by a feeder at a fixed step distance, allowing multiple operations such as punching, bending, trimming, and drawing to be completed within a single die set. Suitable for small parts and thin materials: Often used for processing smaller and thinner parts; also suitable for processing larger parts.

[0041] When processing larger parts, due to the larger size and weight of the sheet material, if the sheet material is not limited and buffered during pre-blanking, the impact force generated by the falling sheet material will accelerate the loss of the progressive die, which is not conducive to the control of production efficiency and production costs.

[0042] During processing, the material sheet is first grabbed from the stacking area to the top of the progressive die (the progressive die is fixedly installed on the receiving plate 1) (during the transfer of the material sheet, both sides of the material sheet are in contact with the positioning columns 2 to ensure that the position of the material sheet meets the processing requirements), and then the material sheet is released. Under the action of the positioning columns 2, the material sheet will fall vertically until it lands steadily on the lifting platform 3; under the action of gravity, the material sheet will drive the lifting platform 3 to descend synchronously. At this time, the lifting platform 3 will slide inward in the lifting groove 101, and the ejection mechanism will give the lifting platform 3 a thrust during this process, so that it has a tendency to slide outward in the lifting groove 101, thereby reducing the descending speed and descending distance of the lifting platform 3, so that the material sheet does not directly contact the mold after falling, thereby avoiding mold loss, improving the service life of the mold, and effectively controlling production efficiency and production costs. Afterwards, under the stamping of the stamping device, the material sheet will drive the lifting platform 3 to move downward synchronously until the lifting platform 3 is completely immersed in the lifting groove 101, and the material sheet begins to be stamped and formed. During this process, the buffer mechanism can slow down the initial stamping speed of the material sheet so that the stamping and forming of the material sheet can better meet the design requirements.

[0043] The buffering force of the buffering mechanism is increased or decreased by the adjusting mechanism, so that when the lifting platform 3 is not in contact with the material sheet, its part is exposed outside the lifting groove 101, and the height of the exposed part of the lifting platform 3 can be controlled by the adjusting mechanism, so that all the lifting platforms 3 are in the same horizontal plane in the initial state to ensure that the material sheet is level with the mold during stamping; at the same time, the speed of the material sheet when it is driven by the stamping device to contact the mold can be increased or decreased by the adjusting mechanism to improve the stamping effect of the material sheet.

[0044] As a further solution of the present invention, a plurality of lifting slots 101 are symmetrically provided on the receiving plate 1 , two lifting slots 101 provided in the transverse direction of the receiving plate 1 form a group, and two adjacent groups cooperate with each other.

[0045] In this embodiment, the position of the lifting groove 101 determines the position of the positioning column 2, so the positioning column 2 is symmetrically installed on both sides of the receiving plate 1, so that when the material plate is transferred to the top of the progressive die, the position of the material plate meets the processing requirements; the lifting platform 3 arranged in the multiple sets of lifting grooves 101 can keep the material plate parallel to the mold during the movement, stamping and other processes, thereby improving the forming effect of the material plate.

[0046] As a further solution of the present invention, the buffer mechanism includes an extrusion groove 102 opened on the receiving plate 1 and connected to the lifting groove 101, a slider 6 is slidably engaged in the extrusion groove 102, an extrusion rod 4 cooperating with the lifting platform 3 is slidably engaged in the extrusion groove 102, and a spring 5 fixedly connected to the extrusion rod 4 is fixedly installed on the slider 6.

[0047] In this embodiment, the slider 6 is connected to the adjustment mechanism, and the position of the slider 6 in the extrusion groove 102 is controlled by the adjustment mechanism and will not be changed by external factors. Therefore, the extrusion rod 4 will slide outward in the extrusion groove 102 under the elastic force of the spring 5, thereby pushing the lifting platform 3 to slide upward in the lifting groove 101. When the forces on the extrusion rod 4 are balanced (gravity, elastic force, resistance), the lifting platform 3 will no longer move. At this time, part of the lifting platform 3 is exposed in the lifting groove 101.

[0048] When the material sheet is released, it will come into contact with the lifting platform 3. The gravity of the material sheet will act on the extrusion rod 4 through the lifting platform 3, thereby releasing the force balance state of the extrusion rod 4. At this time, the material sheet will drive the lifting platform 3 to slide inward in the lifting groove 101, and at the same time push the extrusion rod 4 to slide inward in the extrusion groove 102, compressing the spring 5. The elastic force of the spring 5 will increase with the increase of the compression amount, and slow down the falling speed of the material sheet and the lifting platform 3 by rebounding, thereby preventing the material sheet from falling on the progressive die, reducing the loss of the mold, and increasing the service life of the mold, which can effectively control production efficiency and production costs.

[0049] As a further solution of the present invention, a surface of the extrusion rod 4 close to the lifting platform 3 is set as an inclined surface, and a surface of the lifting platform 3 close to the extrusion rod 4 is set as a slope.

[0050] In this embodiment, the sloped surface and the inclined surface are in close contact with each other. Through the interaction between the inclined surface and the sloped surface, the elastic force of the spring 5 is converted into a force that causes the lifting platform 3 to slide upward in the lifting groove 101, and the gravity of the lifting platform 3 and the material sheet is converted into a force that causes the extrusion rod 4 to slide inward in the extrusion groove 102. This arrangement can reduce the thickness of the receiving plate 1, thereby reducing the weight of the entire device.

[0051] As a further solution of the present invention, the adjustment mechanism includes a slide groove 103 provided on the receiving plate 1 , the slide groove 103 is connected to the extrusion groove 102 , and a slide rod 7 fixedly connected to the slider 6 is slidably engaged in the slide groove 103 .

[0052] In this embodiment, by driving the slide rod 7 to slide in the slide groove 103, the slider 6 is driven in the extrusion groove 102 to move closer to or away from the extrusion rod 4, thereby changing the compression amount of the spring 5, causing the initial elastic force of the spring 5 to increase or decrease, thereby changing the height of the initial exposed part of the lifting groove 101 of the lifting platform 3, which can better cushion the falling speed of material plates of different weights.

[0053] As a further solution of the present invention, the adjustment mechanism also includes an adjustment groove 104 opened on the receiving plate 1, and the adjustment groove 104 is slidably engaged with an internal threaded sleeve 8, and the internal threaded sleeve 8 is fixedly connected to the two sliding rods 7; a rotating shaft 9 rotatably connected to the receiving plate 1 is provided in the adjustment groove 104, and an external threaded protrusion 901 threadedly connected to the internal threaded sleeve 8 is fixedly installed on the rotating shaft 9.

[0054] In this embodiment, when the rotating shaft 9 is rotated, the external thread protrusion 901 will rotate synchronously therewith, and drive the internal thread sleeve 8 to slide in the adjustment groove 104 through thread cooperation, thereby changing the position of the slide rod 7 in the slide groove 103, thereby adjusting the position of the slider 6 in the extrusion groove 102.

[0055] The rotation direction of the multiple external threaded protrusions 901 changes alternately along the length of the rotating shaft 9; and when the rotating shaft 9 stops rotating, the position of the internal threaded sleeve 8 will not change, thereby ensuring the position of the slider 6 in the extrusion groove 102. The buffering force of the buffer mechanism is increased or decreased by the adjustment mechanism, so that when the lifting platform 3 is not in contact with the material sheet, it is partially exposed outside the lifting groove 101. The height of the exposed part of the lifting platform 3 can be controlled by the adjustment mechanism, so that all lifting platforms 3 are in the same horizontal plane in the initial state, ensuring that the material sheet is level with the mold during stamping. At the same time, the adjustment mechanism can increase or decrease the speed of the material sheet when it contacts the mold under the drive of the stamping device, so as to improve the stamping effect of the material sheet.

[0056] As a further solution of the present invention, a knob block 902 is fixedly mounted on the rotating shaft 9 , and the surface friction coefficient of the knob block 902 is relatively large.

[0057] In this embodiment, the knob block 902 can reduce the resistance to rotating the rotating shaft 9, making it easier for the operator to change the buffering force of the buffer mechanism at any time according to the actual processing situation.

[0058] The above embodiments are exemplary rather than restrictive, so any technical solution of the present invention that can be implemented in other specific forms without departing from the spirit or basic features of the present invention is included in the present invention.

Claims

1. A pre-blanking limiting device for a progressive die for an iron core, comprising a receiving plate (1); It is characterized by: The receiving plate (1) is provided with a plurality of lifting grooves (101), wherein positioning columns (2) are fixedly installed in the lifting grooves (101); and a lifting platform (3) slidably connected to the positioning columns (2) is slidably installed in the lifting grooves (101); The receiving plate (1) is provided with a buffer mechanism, and when the lifting platform (3) receives the material plate, the buffer mechanism can buffer and reduce the descending speed of the lifting platform (3) to reduce the falling speed of the material plate; The receiving plate (1) is provided with an adjustment mechanism for increasing or decreasing the buffering effect of the buffer mechanism.

2. The pre-blanking limiting device for a progressive die of an iron core according to claim 1, characterized in that: A plurality of lifting grooves (101) are symmetrically arranged on the receiving plate (1), two lifting grooves (101) arranged in the transverse direction of the receiving plate (1) form a group, and two adjacent groups cooperate with each other.

3. The pre-blanking limiting device for a progressive die of an iron core according to claim 2, characterized in that: The buffer mechanism comprises an extrusion groove (102) provided on the receiving plate (1) and connected to the lifting groove (101); a slider (6) is slidably engaged in the extrusion groove (102); an extrusion rod (4) cooperating with the lifting platform (3) is slidably engaged in the extrusion groove (102); a spring (5) fixedly connected to the extrusion rod (4) is fixedly mounted on the slider (6).

4. The pre-blanking limiting device for a progressive die of an iron core according to claim 3, characterized in that: A side of the extrusion rod (4) close to the lifting platform (3) is configured as an inclined surface, and a side of the lifting platform (3) close to the extrusion rod (4) is configured as a sloped surface.

5. The pre-blanking limiting device for a progressive die of an iron core according to claim 4, characterized in that: The adjustment mechanism comprises a slide groove (103) provided on the receiving plate (1), the slide groove (103) being in communication with the extrusion groove (102), and a slide rod (7) fixedly connected to the slider (6) being slidably engaged in the slide groove (103).

6. The pre-blanking limiting device for a progressive die of an iron core according to claim 5, characterized in that: The adjustment mechanism further comprises an adjustment groove (104) provided on the receiving plate (1), wherein an internal threaded sleeve (8) is slidably engaged in the adjustment groove (104), and the internal threaded sleeve (8) is fixedly connected to the two sliding rods (7); a rotating shaft (9) rotatably connected to the receiving plate (1) is provided in the adjustment groove (104), and an external threaded protrusion (901) threadedly connected to the internal threaded sleeve (8) is fixedly mounted on the rotating shaft (9).

7. The pre-blanking limiting device for a progressive die of an iron core according to claim 6, characterized in that: A knob block (902) is fixedly mounted on the rotating shaft (9).

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