Height-adjustable combined lower die of numerical control press

Abstract

The utility model relates to a height-adjustable combined lower die of a numerical control press, which is used for the numerical control press, comprises a lower die body, a lower die core arranged at the upper part of an inner cavity of the lower die body and an adjustable base arranged at the lower part of the inner cavity of the lower die body, and is characterized in that the lower part of the inner cavity of the lower die body is provided with an internal thread; the lower die body and the adjustable base are connected and installed through inner threads and outer threads, the adjustable base can move up and down by rotating the adjustable base forwards and backwards, and therefore the up-down position of the lower die core in an inner cavity of the lower die body is changed, and the height of the combined lower die is adjusted. After height adjustment is finished, the lower die body and the lower die core are connected and fixed through a fastening screw, and the lower die body and the adjustable base are connected and fixed through a positioning ball with threads or a fastening screw. The utility model has the advantages that the regrinding amount of the lower die can be effectively increased, the test die adjusting time of the forming die can be saved, the structure is simple and reliable, the operation is convenient and fast, and the application range is wide.

Description

Technical Field

[0001] This utility model relates to the lower die of a punch press, and in particular to a combined lower die of a CNC punch press with adjustable height. Background Technology

[0002] Existing CNC punching die combination lower dies, when used as blanking lower dies, require various specifications of shims of different thicknesses to ensure that the lower die height remains unchanged after the lower die core cutting edge wears down and the die is re-cut. When used as forming dies, they often cannot meet the requirements of the specified forming height and must be configured accordingly. In particular, when the thickness of the processed plate changes, design changes are required, which increases the workload of die design and manufacturing. Summary of the Invention

[0003] The purpose of this invention is to provide an adjustable height combination lower mold that is low in manufacturing cost, has a wide range of applications, a simple and reliable structure, and is easy and quick to operate.

[0004] The technical solution of this utility model is to design an adjustable height combination lower die for a CNC punch press, including a lower die body, a lower die core located in the upper part of the lower die body cavity, and an adjustable base at its lower part. The lower die body cavity has an internal thread, and the outer diameter of the adjustable base has an external thread. The lower die body and the adjustable base are connected and installed through the internal and external threads. The forward and reverse rotation of the adjustable base allows it to move up and down, thereby changing the vertical position of the lower die core in the lower die body cavity and adjusting the height of the combination lower die. After the height adjustment is completed, the lower die body and the lower die core are connected and fixed with fastening screws, and the lower die body and the adjustable base are connected and fixed with threaded positioning beads or fastening screws.

[0005] The lower mold body of this utility model is disc-shaped, and its external structural dimensions are adapted to the lower mold cavity of the machine tool. The upper part of the lower mold body is provided with a circular hole for installing the lower mold core. A positioning pin is fixed on the wall of the circular hole, and the position of the positioning pin is in the same direction as the keyway on the outer diameter of the lower mold body that positions the lower mold cavity of the machine tool. The wall of the circular hole is also provided with at least one screw hole for installing a fastening screw. The lower part of the circular hole is provided with an internal thread, and the wall of the internal thread is provided with a screw hole for installing a threaded positioning ball or a fastening screw. The lower end face of the lower mold body is provided with an annular numerical mark that can indicate the adjustment distance.

[0006] The lower die core of this utility model is in the shape of a circular plate. The lower die core is provided with a lower die cutting edge that matches the cutting edge of a specific punch in the upper die. The outer diameter of the lower die core matches the circular hole in the upper part of the lower die body. The lower die core and the lower die body are connected together by fastening screws provided on the column of the lower die body. The outer diameter of the lower die core is also provided with one or more longitudinal keyways that are evenly distributed at an angle to each other and are positioned with the positioning pins on the wall of the circular hole of the lower die body.

[0007] The adjustable base of this utility model is in the shape of a circular plate. The outer diameter of the adjustable base is provided with an external thread that matches the internal thread of the lower part of the mold body. Two or more longitudinal straight grooves are evenly distributed on the external thread, which match the ends of the threaded positioning beads or fastening screws. After adjustment, the ends of the threaded positioning beads or fastening screws are pressed on the straight grooves to prevent the vertical position between the adjustable base and the lower mold body from becoming loose. The minimum adjustment interval of the combined lower mold depends on the pitch of the adjustable base and the number of its straight grooves. The lower end face of the adjustable base is provided with a hole or groove for inserting a rotating tool. The lower end face of the adjustable base is provided with a zero line mark that corresponds to the annular numerical mark on the lower end face of the lower mold body when the combined lower mold is at the calibrated height. The adjustable base is also provided with a drain hole for passing through punching residue.

[0008] The working principle of this utility model is that the lower die body, lower die core, and adjustable base are connected and installed by internal and external threads. The lower die core and adjustable base can be set to their corresponding positions for both forward and reverse rotation. When the combined lower die is used as a punching lower die, the lower die height can be kept unchanged after the cutting edge of the lower die core is worn and re-sharpened. When used as a forming die core, the height of the lower die core can be adjusted conveniently and quickly to achieve the specified forming height.

[0009] The advantages of this invention are that it can effectively increase the amount of re-grinding of the lower mold, save the trial molding and adjustment time of the molding die, and has a simple and reliable structure, is easy and quick to operate, and has a wide range of applications. Attached Figure Description

[0010] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0011] Figure 2 This is a cross-sectional view of the lower mold body of this utility model;

[0012] Figure 3 This is a bottom view of the lower mold body of this utility model;

[0013] Figure 4 This is a top view of the lower mold core of this utility model;

[0014] Figure 5 This is a cross-sectional view of the adjustable base of this utility model;

[0015] Figure 6 This is a bottom view of the adjustable base of this utility model. Detailed Implementation

[0016] like Figure 1As shown, this utility model consists of a lower mold body 1, a lower mold core 2, an adjustable base 3, two fastening screws 4, and threaded positioning beads 5. The rated height of the combined lower mold in this embodiment is H (excluding the reinforcing boss at the bottom of the lower mold body 1), the rated thickness of the lower mold core 2 is H1, and the rated working state is that the upper surfaces of the lower mold body 1 and the lower mold core 2 are flush (see...). Figure 1 ).

[0017] like Figure 1 , 2 As shown in Figure 3, the lower mold body 1 is disc-shaped, and its external structural dimensions are adapted to the lower mold cavity of the machine tool. A reinforcing boss is provided at the bottom. The upper part of the lower mold body 1 has a circular hole for installing the lower mold core 2. A positioning pin 101 is fixed on the wall of the circular hole. The position of the positioning pin 101 is aligned with the keyway 1-1 on the outer diameter of the lower mold body 1, which positions the lower mold cavity of the machine tool. Two screw holes 1-2, symmetrical to the positioning pin 101 and distributed at a 120° angle, are also provided on the wall of the circular hole for installing fastening screws 4. An internal thread 1-3 is provided at the bottom of the circular hole. In this embodiment, the internal thread pitch is 1.5 mm. A screw hole 1-4 is provided on the wall of the internal thread 1-3 for installing a threaded positioning bead 5. The lower end face of the lower mold body 1 has an annular numerical mark 1-5 indicating an adjustment spacing of 0.1 mm, such as 0, 0.1, 0.2, etc. (see Figure 3). Figure 3 ).

[0018] like Figure 1 , 4 As shown, the lower die core 2 is in the shape of a circular plate, and it is provided with a rectangular cutting edge 2-1 that matches the cutting edge of the upper die punch; the outer diameter of the lower die core 2 matches the circular hole at the upper part of the lower die body 1; the outer diameter of the lower die core 2 is also provided with two longitudinal keyways 2-2 that are distributed at 90° to maintain positioning with the positioning pin 101 on the wall of the circular hole of the lower die body 1.

[0019] like Figure 1 , 5 As shown in Figure 6, the adjustable base 3 is in the shape of a circular plate. Its outer diameter is provided with an external thread 3-1 that matches the internal thread 1-3 of the lower part of the lower mold body 1. The external thread 3-1 is evenly distributed with 15 longitudinal V-shaped straight grooves 3-2 that match the threaded positioning beads 5. After adjustment, the steel ball at the end of the threaded positioning bead 5 is pressed on the V-shaped straight groove 3-2 to prevent the adjustable base 3 from becoming loose in the vertical position between the lower mold body 1 and the adjustable base 3. The minimum adjustment interval of this mechanism is 0.1mm. The lower end face of the adjustable base 3 is provided with a zero line mark 3-3 that corresponds to the annular numerical mark 1-5 on the lower end face of the lower mold body 1 when the combined lower mold is at the calibrated height H. The lower end face of the adjustable base 3 is provided with two slots 3-4 for inserting rotating tools. The adjustable base is also provided with a drain hole 3-5 for passing punching residue.

Claims

1. A CNC punch press adjustable height combination lower die, comprising a lower die body, a lower die core disposed in the upper part of the lower die body cavity, and an adjustable base at its lower part, characterized in that the lower die... The lower part of the inner cavity is provided with an internal thread, and the outer diameter of the adjustable base is provided with an external thread. The lower mold body and the adjustable base are connected and installed through the internal and external threads. The forward and reverse adjustable base can move the adjustable base up and down, thereby changing the vertical position of the lower mold core in the inner cavity of the lower mold body and adjusting the height of the combined lower mold. After the height adjustment is completed, the lower mold body and the lower mold core are connected and fixed with fastening screws, and the lower mold body and the adjustable base are connected and fixed with threaded positioning beads or fastening screws.

2. The adjustable-height combined lower die of the CNC punching machine as described in claim 1, characterized in that: The lower mold body is disc-shaped, and its external structural dimensions are adapted to the lower mold cavity of the machine tool. The upper part of the lower mold body has a circular hole for installing the lower mold core. A positioning pin is fixed on the wall of the circular hole, and the position of the positioning pin is in the same direction as the keyway on the outer diameter of the lower mold body that positions the lower mold cavity of the machine tool. The wall of the circular hole also has at least one screw hole for installing a fastening screw. The lower part of the circular hole has an internal thread, and the wall of the internal thread has a screw hole for installing a threaded positioning ball or a fastening screw. The lower end face of the lower mold body has an annular numerical mark that can indicate the adjustment distance.

3. The adjustable-height combined lower die of the CNC punching machine as described in claim 1 or 2, characterized in that: The lower die core is in the shape of a disc, and the lower die core is provided with a lower die cutting edge that matches the cutting edge of a specific punch in the upper die; the outer diameter of the lower die core matches the circular hole in the upper part of the lower die body, and the lower die core and the lower die body are connected together by fastening screws set on the column of the lower die body; the outer diameter of the lower die core is also provided with one or more longitudinal keyways that are evenly distributed at an angle to each other and are positioned with the locating pins on the wall of the circular hole of the lower die body.

4. The adjustable-height combined lower die of the CNC punching machine as described in claim 1 or 2, characterized in that: The adjustable base is disc-shaped. Its outer diameter has external threads that match the internal threads of the lower die body. Two or more longitudinal straight grooves are evenly distributed on the external threads, each matching the end of a threaded positioning bead or fastening screw. After adjustment, the threaded positioning bead or fastening screw is pressed into the straight groove to prevent loosening between the adjustable base and the lower die body. The minimum adjustment interval of the combined lower die depends on the pitch of the adjustable base and the number of its straight grooves. The lower end face of the adjustable base has holes or slots for inserting rotating tools. The lower end face of the adjustable base also has a zero-line mark corresponding to the annular numerical mark on the lower end face of the lower die body when the combined lower die is at the specified height. The adjustable base also has drainage holes for passing punching waste.

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