One-way knife-edge threshold gap stamping die

Abstract

This utility model discloses a unidirectional cutting edge sill notch stamping die, comprising, from top to bottom: an upper die frame plate, a punch fixing plate, a stripper plate, a lower die pressure plate, a lower die baffle, a lower die frame plate, and a shim. Multiple limiting guide posts are installed on the lower surface of the upper die frame plate. The ends of these limiting guide posts pass continuously through the punch fixing plate, the stripper plate, and the lower die pressure plate before abutting against the lower die baffle. A punch is fixedly installed in the middle of the punch fixing plate. A punch passage groove is provided in the middle of the stripper plate. A return spring is provided between the stripper plate and the punch fixing plate. A punch groove is provided in the middle of the lower die pressure plate. There are two lower die baffles, the distance between which matches the width of the sill notch to be stamped. Sill surface receiving grooves are provided on the upper surfaces of the two lower die baffles. Through this method, this utility model can significantly improve the processing efficiency of the sill bottom hole and reduce the production cost of the sill.

Description

Technical Field

[0001] This utility model relates to the field of sill processing equipment, and in particular to a sill notch stamping die with a one-way cutting edge. Background Technology

[0002] An elevator sill is a metal step component used below elevator landing doors. Installing a sill regulates the opening and closing path of the landing doors, reduces door sway, and minimizes abnormal noises during door opening and closing. During manufacturing, multiple bottom holes need to be drilled in the bottom of the sill door groove for easy fixing during installation. Currently, these bottom holes are generally machined using CNC machining centers. However, since CNC machining centers are not specialized tools, the machining efficiency for these bottom holes is low, resulting in high overall costs. To reduce overall processing costs, a special machining mold for the bottom holes of elevator sills needs to be created to improve processing efficiency and reduce production costs. Utility Model Content

[0003] The main technical problem solved by this utility model is to provide a unidirectional cutting edge notch stamping die, which can significantly improve processing efficiency and reduce processing costs.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A one-way cutting edge notch stamping die is provided, wherein the one-way cutting edge notch stamping die is arranged from top to bottom as follows: an upper die holder plate, a punch fixing plate, a stripper plate, a lower die pressure plate, a lower die baffle, a lower die holder plate, and two pads symmetrically installed on the lower surface of the lower die holder plate. Multiple limiting guide posts are installed on the lower surface of the upper die holder plate. The ends of the multiple limiting guide posts continuously pass through the punch fixing plate, the stripper plate, and the lower die pressure plate and abut against the lower die baffle plate. The punch… A punch is fixedly installed in the middle of the fixed plate. A punch passage groove is provided in the middle of the unloading plate. A return spring is provided between the unloading plate and the punch fixing plate. A punch groove matching the size of the punch is provided in the middle of the lower die pressure plate. There are two lower die baffles, symmetrically fixed to the lower die frame plate. The distance between the two lower die baffles matches the width of the door slot of the sill to be punched. Receiving grooves matching the two side surfaces of the sill are provided on the upper surfaces of the two lower die baffles. Thus, the two lower die baffles, together with the lower die frame plate and the upper die pressure plate, enclose the fixed position of the sill.

[0005] In a preferred embodiment of this utility model, the height of the lower mold baffle is 1.2 to 1.5 times the height of the door groove of the sill.

[0006] In a preferred embodiment of this utility model, the cutting edge of the punch is an arc-shaped cutting edge that is high at both ends and low in the middle.

[0007] In a preferred embodiment of the present invention, the punch of the unloading plate is provided with two sill blocks arranged closely and symmetrically on both sides of the groove, and the outline of the punch groove on the lower die plate is fitted with the vertical projection of the two sill blocks and the punch together.

[0008] In a preferred embodiment of this utility model, a door groove filling block is installed on the lower surface of the lower mold plate. The outline of the door groove filling block is fitted with the internal clearance of the door groove of the sill. When the lower mold plate is pressed against the lower mold baffle, the door groove filling block is inserted into the door groove of the sill. There are two door groove filling blocks, which are respectively arranged on the outer sides of the front and rear ends of the punch groove.

[0009] The beneficial effects of this utility model are as follows: This utility model is a special stamping die for the bottom hole designed for the structural characteristics of the sill. When designing this die, according to the tension characteristics of the profile used for sill processing, the lower die adopts a bladeless punching process, which has high punching efficiency, high quality, neat notch, and no deformation, and can meet the assembly requirements of the sill components. Moreover, after using this die in conjunction with a punch press, the processing efficiency of the bottom hole of the sill can be increased from a minimum of 400 pieces / 8 hours to 1000 pieces / 8 hours, which significantly improves the overall processing efficiency and reduces production costs. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of a preferred embodiment of the present invention;

[0011] Figure 2 This is a front view structural diagram of the embodiment shown;

[0012] Figure 3 This is an exploded view of the structure of the embodiment shown;

[0013] The components in the attached diagram are labeled as follows:

[0014] 1. Sill, 2. Upper mold frame plate, 3. Punch fixing plate, 4. Unloading plate, 5. Lower mold pressure plate, 6. Lower mold baffle, 7. Lower mold frame plate, 8. Shim, 9. Limiting guide post, 10. Return spring, 11. Sill pressure block, 12. Punch, 13. Door slot filling block. Detailed Implementation

[0015] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0016] Please see Figures 1 to 3 The embodiments of this utility model include:

[0017] A one-way cutting edge sill notch stamping die, comprising, from top to bottom: an upper die plate 2, a punch fixing plate 3, a stripper plate 4, a lower die pressure plate 5, a lower die baffle 6, a lower die plate 7, and two pads 8 symmetrically mounted on the lower surface of the lower die plate 7. Four limiting guide posts 9 are mounted on the lower surface of the upper die plate 2. The ends of the multiple limiting guide posts pass through the punch fixing plate 3, the stripper plate 4, and the lower die pressure plate 5 and abut against the lower die baffle 6. A punch 12 is fixedly mounted in the middle of the punch fixing plate. The unloading plate 4 has a punch passage groove in the middle, and a return spring 10 is provided between the unloading plate 4 and the punch fixing plate 3. The lower die pressure plate 5 has a punch groove in the middle that matches the size of the punch 12. There are two lower die baffles 6, which are symmetrically fixed on the lower die frame plate 7. The distance between the two lower die baffles 6 matches the width of the door groove of the sill 1 to be punched. The upper surface of the two lower die baffles 6 has a receiving groove that matches the two side sill surfaces of the sill 1. In this way, the two lower die baffles 6, together with the lower die frame plate 7 and the upper die pressure plate 5, surround the fixed position of the sill 1.

[0018] The height of the lower mold baffle 6 is 1.2 to 1.5 times the height of the door groove of the sill 1. In actual mold making, it is generally made according to 1.4 times the height of the door groove. In this way, there is enough space below the fixed position of the sill 1, so that the fragments generated after stamping can be easily blown away from the middle by the high-pressure blower.

[0019] The cutting edge of the punch 12 is an arc-shaped cutting edge that is high at both ends and low in the middle. This cuts off both ends first during the top-down punching process, which avoids the outward-turning edges that are generated on both sides of the punch when punching with a conventional punch head. The outward-turning edges are relatively sharp and can easily injure assembly personnel.

[0020] The punch of the unloading plate 4 has two sill blocks 12 closely and symmetrically arranged on both sides of the groove. The outline of the punch groove on the lower die plate 5 is matched with the vertical projection of the two sill blocks 12 and the punch 12 together. The purpose of setting two sill blocks 11 is that during the punching process, the sill blocks 11 will first press on the two sides of the sill 1, reducing the sill 1 from shaking under force. In this way, when the punch 12 reaches the bottom of the groove, the punched hole edge is neat and the size is accurate.

[0021] A door groove filler block 13 is installed on the lower surface of the lower die plate 5. The outline of the door groove filler block 13 is fitted with the internal clearance of the door groove of the sill 1. When the lower die plate 5 is pressed on the lower die baffle 6, the door groove filler block 13 is inserted into the door groove of the sill 1. There are two door groove filler blocks 13, which are respectively arranged on the outer sides of the front and rear ends of the punch groove. By using the door groove filler block, the overall strength of the door groove can be improved, preventing the door grooves on both sides from being squeezed towards the middle during the stamping process, causing local deformation and affecting the final product assembly quality.

[0022] In actual use, the sill 1 is first installed in the workpiece placement position enclosed by the lower die plate 5, the lower die baffle 6, and the lower die frame plate 7. Then, the punch fixing plate 4 is pressed down along the limiting guide post 9. During the pressing, the return spring 9 pushes the unloading plate 4 to press down as well. During this process, the sill pressing block 11 on the unloading plate 4 first presses onto the sill surfaces on both sides of the sill 1 to fix the sill 1. Then, the punch head 12 punches down to the bottom of the door groove. After the punching is completed, the punch fixing plate 3 is lifted up, and the return spring 9 pushes the punch fixing plate 3 to separate from the unloading plate 4. Then, the sill 1 moves forward a preset length under the action of the automatic feeding device to send the next punching position to the workpiece placement position.

[0023] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A unidirectional cutting edge notch stamping die for a sill, characterized in that, The unidirectional cutting edge notch stamping die is arranged from top to bottom as follows: upper die plate, punch fixing plate, stripper plate, lower die pressure plate, lower die baffle, lower die plate, and two shims symmetrically installed on the lower surface of the lower die plate. Multiple limiting guide posts are installed on the lower surface of the upper die plate. The ends of the multiple limiting guide posts pass through the punch fixing plate, stripper plate, and lower die pressure plate and abut against the lower die baffle. A punch is fixedly installed in the middle of the punch fixing plate, and a stripper plate is provided in the middle of the stripper plate. The punch passes through a slot, and a return spring is provided between the unloading plate and the punch fixing plate. The lower die pressure plate has a punch groove in the middle that matches the size of the punch. There are two lower die baffles, which are symmetrically fixed on the lower die frame plate. The distance between the two lower die baffles matches the width of the door slot of the sill to be punched. The upper surfaces of the two lower die baffles have receiving grooves that match the two side sill surfaces of the sill. In this way, the two lower die baffles, together with the lower die frame plate and the upper die pressure plate, surround the fixing position of the sill.

2. The unidirectional cutting edge notch stamping die according to claim 1, characterized in that, The height of the lower mold baffle is 1.2 to 1.5 times the height of the door groove of the sill.

3. The unidirectional cutting edge notch stamping die according to claim 1, characterized in that, The cutting edge of the punch is an arc-shaped cutting edge that is high at both ends and low in the middle.

4. The unidirectional cutting edge notch stamping die according to claim 1, characterized in that, The punch of the unloading plate has two sill blocks closely and symmetrically arranged on both sides of the groove. The outline of the punch groove on the lower die plate is fitted with the vertical projection of the two sill blocks and the punch together.

5. The unidirectional cutting edge notch stamping die according to claim 1, characterized in that, A door groove filling block is installed on the lower surface of the lower molding plate. The outline of the door groove filling block is matched with the gap inside the door groove of the sill. When the lower molding plate is pressed on the lower molding baffle, the door groove filling block is just inserted into the door groove of the sill.

6. The unidirectional cutting edge notch stamping die according to claim 5, characterized in that, There are two door groove filling blocks, which are respectively arranged on the outer sides of the front and rear ends of the punch groove.

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