Stamping die convenient to demould

Abstract

The utility model provides a stamping die convenient to demould, which relates to the field of stamping dies and comprises an operating platform, a positioning upright post, a lifting plate, a hydraulic mechanism, an upper die, an annular pressing block and a lower die, a groove is arranged on the end face of the lower die corresponding to the upper die, a top plate is arranged at the bottom of the groove, and a plurality of sliding cavities are arranged on the lower side of the groove. The side, away from the groove, of the driving block is connected with the inner wall of the corresponding sliding cavity through a reset spring, a first sliding groove is formed in the end, close to the groove, of the driving block, an ejector rod is slidably arranged in the first sliding groove, and the end, away from the driving block, of the ejector rod is connected with an ejector plate. According to the stamping die, automatic demolding of stamped parts can be carried out, unloading time consumption is reduced, and the stamping efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping dies, in particular to a stamping die which is easy to demould. Background Art

[0002] A stamping die is a special process equipment used to process materials into parts during cold stamping. It uses a die installed on a press to apply pressure to the material and cooperates with a die set on an operating table to form a pressing cavity, so that the material separates or plastically deforms, and then the desired product is obtained. Chinese patent document CN219944279U discloses an automotive metal arrest stamping die, which, through the setting of an automatic lifting component, starts two sets of motors by controlling a circuit board during the stamping process of the die, thereby automatically shielding the explosion-proof cover from the base and the top plate, without the need for manual operation, avoiding the phenomenon of metal debris splashing during the stamping process of the die, and improving safety. However, after the stamping die completes the forming of the metal part, the molded part is prone to adhere to the die (upper die or lower die) due to the extrusion pressure: when adhered to the surface of the upper die, as the upper die continues to rise, the molded part falls due to gravity, causing damage to the workpiece and equipment, and even injuring the operator; when adhered to the inner wall of the lower die, it is difficult for the operator to remove it (i.e. the molded part), and demolding takes a long time, affecting the stamping efficiency and stamping continuity. At the same time, forced demolding can easily cause burrs, scratches, deformation, cracks and other problems on the molded parts, reducing the quality of the molded products. Utility Model Content

[0003] In view of the problems existing in the above-mentioned prior art, the purpose of the utility model is to provide a stamping die that is easy to demold. After the stamping is completed, the stamping die can automatically remove the formed parts from the surface of the die, i.e., the upper die and the lower die, thereby avoiding the problems of the formed parts falling off, the demolding taking a long time, and the forced demolding causing the product quality to be reduced. At the same time, the stamping die can also provide shielding during the stamping process to avoid the problem of metal debris splashing during stamping.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A stamping die for easy demoulding comprises an operating table, a positioning column, a lifting plate, a hydraulic mechanism, an upper die, an annular pressure block and a lower die. Positioning columns are respectively arranged on both sides of the end surface of the operating table, a lifting plate with a hydraulic mechanism is slidably arranged between the two positioning columns, an upper die is arranged on the lower side of the lifting plate and the upper die is connected to the output end of the hydraulic mechanism, an annular pressure block is arranged on the outer ring of the upper die and the annular pressure block is connected to the bottom surface of the lifting plate through a connecting sleeve; a lower die is arranged between the two positioning columns and located on the end surface of the operating table, and a groove is provided on the end surface of the lower die corresponding to the upper die, a top plate is arranged at the bottom of the groove, a plurality of sliding cavities are evenly arranged on the lower side of the groove and around its (i.e., the groove) central axis, a driving block is slidably arranged in the sliding cavity and a side thereof (i.e., the driving block) away from the groove is connected to the corresponding inner wall of the sliding cavity through a reset spring, a first sliding groove with a longitudinal cross section of a right-angled triangle is provided on the top surface of one end of the driving block close to the groove, a push rod is slidably arranged on the inclined surface of the first sliding groove and an end of the push rod away from the driving block is connected to the top plate.

[0006] Based on the further optimization of the above scheme, a vertical sliding cavity is opened in the middle part of the positioning column and a coaxial driving screw is arranged in the vertical sliding cavity; sliding blocks are respectively arranged on the outer walls of the positioning columns corresponding to the lifting plate, and after the sliding blocks pass through the corresponding side walls of the positioning columns, they are clamped in the vertical sliding cavity and passed through by the corresponding driving screw arranged in the vertical sliding cavity, the outer wall of the sliding block is slidably connected with the inner wall of the vertical sliding cavity and the sliding block is threadedly connected with the driving screw, thereby realizing the up and down sliding of the lifting plate between the two positioning columns.

[0007] Based on further optimization of the above solution, a positioning sleeve is fixedly arranged on the bottom surface of the lifting plate and located at the outer ring of the output end of the hydraulic mechanism, and the upper mold is supported by the positioning sleeve to realize hard limiting of the upper mold.

[0008] Based on further optimization of the above solution, the bottom surface of the upper mold under the initial condition is located above the bottom surface of the annular pressing block.

[0009] Based on further optimization of the above solution, the number of the sliding cavities is three or four.

[0010] Based on the further optimization of the above scheme, a second slide groove with the same structure as the first slide groove is opened on the top surface of the driving block close to the return spring, and a driving rod is slidingly arranged on the inclined surface of the second slide groove, and the end of the driving rod away from the driving block passes through the lower mold, and the top ends of multiple driving rods are fixedly connected to the bottom surface of the same annular clamping block; an annular groove is opened on the bottom surface of the annular pressure block corresponding to the annular clamping block, and the annular pressure block is supported by the annular clamping block, and the driving block is pushed to slide in the corresponding sliding cavity by sliding the driving rod in the second slide groove, thereby realizing the lifting and lowering of the top plate.

[0011] Based on further optimization of the above solution, the longitudinal cross-section of the annular clamping block is an isosceles trapezoidal structure with a short upper bottom side and a flat lower bottom side, so that the annular clamping block can be easily clamped in the annular groove.

[0012] The following are the technical effects of the utility model:

[0013] The present application drives the annular pressing block and the upper mold to move downward at the same time through the moving lifting plate. The annular pressing block first contacts the surface of the metal plate to fix and position the metal plate, avoiding the problems of metal plate offset and warping caused by the extrusion force during the stamping process, thereby ensuring the stamping quality and accuracy; at the same time, the connecting sleeve is used to protect the stamping process to avoid the splashing of debris generated by the stamping. After that, the upper mold and the groove are used to cooperate to realize the stamping forming of the metal plate. During this process, the driving block is moved to the end away from each other by squeezing the top plate, so that the top plate is stuck at the bottom of the groove to complete the forming of the mold cavity. After the stamping is completed, the upper mold is reset first and the lifting plate is reset later to separate the molded part from the upper mold, and then the reset between the top plate and the driving block is used to complete the ejection of the molded part, thereby facilitating the demoulding between the molded part and the upper and lower molds, saving demoulding time, improving stamping efficiency, and avoiding potential problems such as part damage or operator injury caused by demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the stamping die in the embodiment of the utility model.

[0015] Figure 2 for Figure 1 AA section view.

[0016] Figure 3 for Figure 1 BB section view.

[0017] Among them, 10, operating table; 20, positioning column; 21, vertical sliding cavity; 22, driving screw; 30, lifting plate; 31, slider; 32, positioning sleeve; 40, hydraulic mechanism; 50, upper mold; 60, annular pressure block; 61, connecting sleeve; 62, annular groove; 70, lower mold; 701, groove; 702, sliding cavity; 71, top plate; 72, driving block; 721, first sliding groove; 722, second sliding groove; 73, push rod; 74, driving rod; 75, annular clamping block; 76, reset spring. DETAILED DESCRIPTION

[0018] 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 of the embodiments.

[0019] Embodiment 1:

[0020] Referring to the figure below: a stamping die for easy demoulding includes an operating table 10, a positioning column 20, a lifting plate 30, a hydraulic mechanism 40, an upper die 50, an annular pressing block 60 and a lower die 70. Positioning columns 20 are respectively arranged on both sides of the end surface of the operating table 10, and a lifting plate 30 with a hydraulic mechanism 40 is slidably arranged between the two positioning columns 20. Figure 1 As shown, specifically: a vertical sliding cavity 21 is provided in the middle of the positioning column 20, and a coaxial driving screw 22 is arranged in the vertical sliding cavity 21 (the upper and lower ends of the driving screw 22 are respectively rotatably connected to the inner wall of the vertical sliding cavity 21); sliding blocks 31 are respectively arranged on the outer walls of the corresponding positioning columns 20 of the lifting plate 30, and the sliding blocks 31 penetrate the corresponding side walls of the positioning columns 20 (the side close to each other), are clamped in the vertical sliding cavity 21, and are penetrated by the corresponding driving screw 22 arranged in the vertical sliding cavity 21, and the outer wall of the sliding block 31 is slidably connected to the inner wall of the vertical sliding cavity 21, and the sliding block 31 is threadedly connected to the driving screw 22 (such as Figure 2 As shown), the lifting plate 30 can slide up and down between the two positioning columns 20; the main body of the hydraulic mechanism 40 is arranged on the end surface of the lifting plate 30 and the output end of the hydraulic mechanism 40 (ie, the telescopic rod) passes through the lifting plate 30.

[0021] An upper mold 50 is disposed on the lower side of the lifting plate 30 and is connected to the output end (i.e., telescopic rod) of the hydraulic mechanism 40. A positioning sleeve 32 is fixedly disposed on the bottom surface of the lifting plate 30 and located at the outer ring of the output end (i.e., telescopic rod) of the hydraulic mechanism 40. The positioning sleeve 32 supports the upper mold 50 to realize the hard limit of the upper mold 50. An annular pressing block 60 is disposed on the outer ring of the upper mold 50 and is connected to the bottom surface of the lifting plate 30 through a connecting sleeve 61 (refer to Figure 1 As shown, the top end of the connecting sleeve 61 is fixedly connected to the bottom surface of the lifting plate 30, and the bottom end of the connecting sleeve 61 is fixedly connected to the top surface of the annular pressing block 60); under the initial condition, the bottom surface of the upper mold 50 is located on the upper side of the bottom surface of the annular pressing block 60 (as shown in FIG. Figure 1 A lower mold 70 is disposed between the two positioning columns 20 and at the end surface of the operating table 10, and a groove 701 is formed on the end surface of the lower mold 70 corresponding to the upper mold 50, and a top plate 71 is disposed at the bottom of the groove 701 (as shown in FIG. Figure 1 As shown, specifically: a card slot is provided in the middle of the bottom surface of the groove 701 and a top plate 71 is provided on the upper side of the card slot, and a plurality of sliding cavities 702 are evenly provided on the lower side of the groove 701 and around the central axis thereof (i.e. the groove 701), and the number of the sliding cavities 702 is three or four (refer to Figure 3 As shown, in this embodiment, the number of sliding chambers 702 is four, and the ends of the plurality of sliding chambers 702 close to each other are connected). A driving block 72 is slidably arranged in the sliding chamber 702, and the side thereof (i.e., the driving block 702) away from the groove 701 is connected to the inner wall of the corresponding sliding chamber 702 through a return spring 76 (combined with Figure 1 and Figure 3The driving block 72 is connected to the groove 71 at one end (i.e., the end close to the center line of the lower mold 70) and is provided with a first slide groove 721 (as shown in FIG. Figure 1 As shown, the inclined surface of the first slide groove 721 is inclined toward the side away from the return spring 76). The first slide groove 721 inclined surface is slidingly provided with a push rod 73, and one end of the push rod 73 away from the driving block 72 (after passing through the lower mold 70 body between the sliding cavity 702 and the card slot) is connected to the top plate 71 (bottom surface) (the push rod 73 is slidably connected to the lower mold 70 body). The driving block 72 is driven in the following manner: a second slide groove 722 with the same structure as the first slide groove 721 is provided on the top surface of one side of the driving block 72 close to the return spring 76 (that is, the longitudinal section of the second slide groove 722 is also a right triangle and the inclined surface of the second slide groove 722 is consistent with the inclined surface of the first slide groove 721 in the inclination direction and angle), and a driving rod 74 is slidably arranged on the inclined surface of the second slide groove 722, and the end of the driving rod 74 away from the driving block 72 passes through the lower mold 70, and the top ends of multiple driving rods 74 (four driving rods 74 in this embodiment) are fixedly connected to the bottom surface of the same annular clamping block 75; an annular groove 62 is provided on the bottom surface of the annular clamping block 60 corresponding to the annular clamping block 75 (see Figure 1 As shown in the figure, the annular clamping block 75 is supported by the annular pressing block 60, and the driving block 72 is pushed to slide in the corresponding sliding cavity 702 by the sliding of the driving rod 74 in the second sliding groove 722, thereby realizing the lifting and lowering of the top plate 71. The longitudinal section of the annular clamping block 75 is an isosceles trapezoidal structure with a short upper bottom side and a wide lower bottom side, so that the annular clamping block 75 is easily clamped in the annular groove 62.

[0022] Working principle:

[0023] The initial state of the entire stamping die is as follows: Figure 1 As shown, when in use, first place the metal sheet to be punched on the end face of the lower die 70 and between the driving rods 74 (the metal sheet is preliminarily positioned by the driving rods 74 to ensure the positioning of the punching center); then, start the lifting plate 30 to move downward (the corresponding driving screw 22 can be controlled to rotate by the driving motors respectively arranged at the upper ends of the positioning columns 20, thereby realizing the control of the lifting plate 30), the lifting plate 30 drives the upper die 50 to move downward through the positioning sleeve 32 and the hydraulic device 40, and drives the annular pressing block 60 to move downward through the connecting sleeve 61, thereby realizing the synchronous downward movement of the upper die 50 and the annular pressing block 60; as the lifting plate 30 moves downward, the annular clamping block 75 is firstly clamped in the annular groove 62, and then the driving rod 74 is pushed downward through the annular pressing block 60, and the downward movement of the driving rod 74 pushes the driving block 72 to slide in a direction away from each other, thereby causing the ejector rod 73 and the ejector plate 71 to move downward, and the return spring 76 to be compressed, until the bottom surface of the annular pressing block 60 contacts the end surface of the metal sheet, and the lifting plate 30 stops moving downward.

[0024] Afterwards, the hydraulic mechanism 40 is started to move the upper die 50 downward to achieve stamping of the metal sheet.

[0025] Then, the lifting mechanism 40 is started to move the upper mold 50 upward. At this time, due to the contact between the annular pressure block 60 and the end face of the part after stamping of the metal sheet, the part is prevented from moving up with the upper mold 50, thereby realizing the demolding between the part and the upper mold 50; finally, the lifting plate 30 is started to move up to the initial position. After the lifting plate 30 moves up, the driving slider 72 slides to one side towards each other due to the elastic force of the return spring 76, thereby making the ejector rod 73 and the driving rod 74 move up synchronously, and the ejector plate 71 ejects the molded part in the groove 701, thereby facilitating the demolding between the part and the lower mold 70.

[0026] Embodiment 2:

[0027] As a further optimization of the solution of the utility model, based on the solution of Example 1, in order to avoid crushing the metal plate, a rubber layer is provided on the bottom surface of the annular pressing block 60 and a through groove is provided in the rubber layer corresponding to the annular groove 62 .

[0028] Embodiment 3:

[0029] As a further optimization of the solution of the utility model, on the basis of the solution of Example 1 or Example 2, in order to ensure the stability of the operation of the lifting plate 30 and avoid its shaking during the lifting process, the top ends of the two positioning columns 20 are connected by a connecting bracket, and the connecting bracket is located on the outer circle of the hydraulic mechanism 40.

Claims

1. A stamping die that is easy to demould, characterized in that: It includes an operating table, a positioning column, a lifting plate, a hydraulic mechanism, an upper mold, an annular pressure block and a lower mold. Positioning columns are respectively arranged on both sides of the end surface of the operating table. A lifting plate with a hydraulic mechanism is slidably arranged between the two positioning columns. An upper mold is arranged on the lower side of the lifting plate and the upper mold is connected to the output end of the hydraulic mechanism. An annular pressure block is arranged on the outer ring of the upper mold and the annular pressure block is connected to the bottom surface of the lifting plate through a connecting sleeve; a lower mold is arranged between the two positioning columns and located on the end surface of the operating table, and a groove is provided on the end surface of the lower mold corresponding to the upper mold, a top plate is arranged at the bottom of the groove, and a plurality of sliding cavities are evenly arranged on the lower side of the groove and around its axis, a driving block is slidably arranged in the sliding cavity, and a side thereof away from the groove is connected to the inner wall of the corresponding sliding cavity through a reset spring, a first sliding groove with a longitudinal cross-section of a right-angled triangle is provided on the top surface of one end of the driving block close to the groove, a push rod is slidably arranged on the inclined surface of the first sliding groove, and an end of the push rod away from the driving block is connected to the top plate.

2. A stamping die for easy demoulding according to claim 1, characterized in that: A vertical sliding cavity is opened in the middle of the positioning column and a coaxial driving screw is arranged in the vertical sliding cavity; sliding blocks are respectively arranged on the outer walls of the positioning columns corresponding to the lifting plates, and after the sliding blocks pass through the corresponding side walls of the positioning columns, they are clamped in the vertical sliding cavity and passed through by the corresponding driving screw arranged in the vertical sliding cavity, the outer wall of the sliding block is slidably connected to the inner wall of the vertical sliding cavity, and the sliding block is threadedly connected to the driving screw.

3. A stamping die for easy demoulding according to claim 1, characterized in that: A positioning sleeve is fixedly arranged on the bottom surface of the lifting plate and located at the outer ring of the output end of the hydraulic mechanism.

4. A stamping die for easy demoulding according to claim 1, characterized in that: The bottom surface of the upper mold under the initial condition is located on the upper side of the bottom surface of the annular pressing block.

5. The stamping die for easy demoulding according to claim 1, characterized in that: The number of the sliding cavities is three or four.

6. A stamping die for easy demoulding according to claim 1, characterized in that: The top surface of the driving block on one side close to the return spring is provided with a second sliding groove with the same structure as the first sliding groove, and a driving rod is slidably arranged on the inclined surface of the second sliding groove. The end of the driving rod away from the driving block passes through the lower mold, and the top ends of multiple driving rods are fixedly connected to the bottom surface of the same annular clamping block; an annular groove is provided on the bottom surface of the annular pressure block corresponding to the annular clamping block.

7. A stamping die for easy demoulding according to claim 6, characterized in that: The longitudinal section of the annular clamping block is an isosceles trapezoidal structure with a short upper bottom side and a flat lower bottom side.

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