Multi-punch-core die of numerical control turret punch press

Abstract

The utility model relates to a multi-punch core die for a numerical control turret punch press, which is used for the numerical control turret punch press and comprises an upper die device and a lower die device, the upper die device comprises an upper die body, a multi-punch core component, an indexing sleeve, a mandrel, a multi-punch core baffle ring component, a guide key, a punch die head component, a stripper plate baffle ring component, a stripper spring, a plurality of stripper plates, a retainer ring, a fastening screw and the like; the lower die device comprises a lower die body, a plurality of lower die cores, a fastening screw, a disc brush and the like, the utility model discloses a numerical control turret punch press, a multi-punch core die is arranged on a standard rotating station die cavity, and a one-station multi-die processing technology is realized by utilizing an upper and lower die rotating alignment structure. The numerical control turret punch press has the advantages that the station potential of the numerical control turret punch press can be excavated, the station number of the numerical control turret punch press is actually increased, and the machining capacity is improved; the device is novel in structure and flexible and convenient to operate; a plurality of existing standard small-station punch cores and lower die cores of the numerical control turret punch press can be fully utilized, and the upper die device and the lower die device with high standardization degree are included.

Description

Technical Field

[0001] The utility model relates to a punching die of a punching machine, in particular to a multi-punch core die of a numerical control turret punching machine. Background Art

[0002] The general usage characteristics of the CNC turret punch press molds currently used are one station, one mold and one blade shape, but in the actual sheet metal processing process, the problem of diverse processing shapes and functions and insufficient stations is often encountered. Traditional CNC turret punch press manufacturers often occupy standard station positions according to customer requirements and set up one or two special multi-punch core molds on the CNC turret punch press. Because it is a special mold position, the upper and lower mold cavities are completely different from the standard mold cavities, and only special multi-punch core molds can be installed. When the multi-punch core mold is not needed, it causes a waste of stations. In addition, the upper and lower mold cores of the special multi-punch core molds are often different from the structural dimensions of the upper and lower mold cores of the standard station, which makes it inconvenient to use and manage. With the rapid development of sheet metal production and processing and the update of CNC systems, it is urgent to improve the use of CNC punch multi-sub molds in standard stations. The research and development of multi-piece molds is very difficult and is still a blank in China. At present, some foreign companies have developed multi-piece molds for CNC punch presses for use in standard workstations, but due to their complex structure, the upper mold core and the lower mold core are not exactly the same as the standard structure, and they are expensive, their domestic application and promotion are limited. Summary of the invention

[0003] The purpose of the utility model is to set a multi-punch core mold on a standard rotary station mold cavity, and use the upper and lower mold rotation alignment structure to rotate and align them according to system instructions, so that the punch in one of the preset punch core assemblies matches with a preset corresponding lower mold core, and perform set alignment punching to tap the potential of the machine tool station, actually increase the number of stations of the CNC turret punch press, and improve the processing capacity.

[0004] The technical solution of the utility model is that it includes an upper die device and a lower die device, the upper die device is composed of an upper die body, multiple punch core assemblies, a dividing sleeve, a core shaft, multiple punch core retaining ring assemblies, a guide key, a die head assembly, a stripper plate retaining ring assembly, a stripper spring group, multiple stripper plates, a retaining ring and a fastening screw; the lower die device is composed of a lower die body, multiple lower die cores, a fastening screw and a disc brush, and is characterized in that at least two punch core assemblies are evenly distributed longitudinally around the core shaft inside the upper die body of the upper die device; the upper part of the dividing sleeve which is arranged in the upper inner cavity of the upper die body and can slide up and down is evenly distributed with at least two dividing grooves adapted to the orientation of the punch core assembly, and the inner end surface of the lower part is evenly distributed with the punch core assembly on the upper die body. The adjusting head has at least two through holes; the guide key arranged in the upper inner cavity of the upper die body keeps the positioning beads on the upper outer circle of the punch head assembly with the striking head at the lower part, the indexing groove on the indexing sleeve and the punch core assembly in a directional manner; the annular convex rib clamping ring arranged under the indexing groove has at least two notches evenly distributed, and the shape and size of one of the notches are different from the shape and size of the other notches. When the lower end of the punch head assembly is evenly distributed with a number of convex buckles that match at least two notches under the above-mentioned indexing groove and are inserted into it and slightly rotated, the punch head assembly and the indexing sleeve are buckled together, and the two are axially stopped. They can only be disengaged when the punch head assembly and the indexing sleeve are in the above-mentioned calibrated position; when working, when the periphery of the punch head assembly is evenly distributed When one of the hole slots with the same number as the number of the punch core assemblies is set on the CNC turret punch press and the telescopic pin is circumferentially stopped, the upper die body together with the indexing sleeve can rotate around the die head. When the locating bead on the die head falls into the indexing groove set on the indexing sleeve, the striking head fixed at the lower end of the die head is aligned with the adjusting head set in the above-mentioned punch core assembly. At this time, one group of the punch core assemblies is in the position to be punched; the upper end is inserted into the core of the die head assembly and the lower end is fastened to the upper shoulder of the core shaft of the core of the upper die body. There is a punch core retaining ring assembly in the loop between the upper shaft shoulder and the shaft retaining ring. The D-shaped retaining ring is fixed with a pin on the opposite end face of its missing circle. The pin is inserted at the lower end of the die head assembly. This retaining ring assembly makes the retaining ring give way. The incomplete circular portion avoids the adjusting head of the punch core assembly to be punched, thereby removing the obstruction. In addition to the punch core assembly aligned with the set striking head, the retaining ring assembly hangs the annular grooves of the adjusting heads of at least two other punch core assemblies on the retaining ring of the retaining ring assembly to avoid entering the waiting state; a boss is also provided at the lower part of the mandrel equipped with the punch core retaining ring assembly, which presses at least two material stripping springs around the mandrel inside the upper mold body and evenly distributed along the longitudinal direction between the upper mold body and the indexing sleeve; the retaining ring assembly that can quickly replace the material stripping plate and is arranged on the lower end face of the upper mold body blocks the disc-shaped material stripping plates with annular grooves on the outer diameter of at least two multi-punch core assemblies at the lower ends against at least two inwardly opening annular grooves at the lower end of the upper mold body;

[0005] The lower die body of the lower die device and the upper die body have at least two punch assemblies evenly distributed inside, and the same number of lower die cores are evenly distributed at corresponding positions, and the blade shapes of the corresponding upper die punches and lower die cores are matched.

[0006] The upper and lower die devices are installed on the standard rotating station of the CNC turret punch press, and are programmed according to the processing requirements. When working, according to the instructions, the upper and lower die devices are rotated and adjusted to position, so that the punch in one of the preset punch core assemblies matches a preset corresponding lower die core to perform the set punching.

[0007] The outer shape of the upper mold body described in the utility model is compatible with the mold cavity of the applicable CNC turret punch machine. The upper part of the upper mold body is provided with a circular inner cavity that is compatible with the outer diameter of the indexing sleeve. A longitudinal guide key is also provided on the inner cavity wall. The indexing sleeve can slide up and down in the inner cavity of the upper mold body and be positioned circumferentially with the indexing sleeve. The core part of the end face of the inner cavity is provided with a countersunk hole for installing the core shaft and the stripping spring. At least two longitudinal guide through holes for installing the punch core assembly are evenly distributed around the countersunk hole. Each guide through hole is provided with a guide groove with the same orientation. The lower end part of each guide through hole is provided with a U-shaped groove with a U-shaped opening facing the core, an open bottom and a convex middle part. The U-shaped groove is compatible with a stripping plate that is disc-shaped and has an annular groove on the outer diameter. At least two countersunk holes for installing auxiliary stripping springs can be arranged on the upper end face of the inner cavity at intervals with the longitudinal guide through holes according to needs. The core part of the lower end face of the upper mold body is provided with a countersunk hole for installing the stripping plate retaining ring assembly. The inner end face of the countersunk hole is evenly distributed with small countersunk holes for installing compression springs and screw holes for installing equal height screws.

[0008] Except for the cutting edge, all punch assemblies of the utility model have the same structure, and are composed of a punch, an adjusting head, a spiral retaining ring and a positioning bead; the head of the punch is provided with an internal thread or an external thread, and a guide key is fixedly provided on the middle guide rod portion thereof, which is slidably matched with the longitudinal guide through hole on the upper die body and the guide key groove thereon. The punch can adopt a standard punch suitable for a CNC turret punch press, or can be set according to needs; the adjusting head is in the shape of a short rod, and its lower end is provided with an internal thread or an external thread matched with the head of the punch, and the punch or adjusting head provided with an external thread is evenly provided with at least one long groove on its external thread, and the punch or adjusting head provided with an internal thread is provided with an annular groove and a small round hole for installing the positioning bead on its internal thread outer cylinder, and a spiral retaining ring is provided on the annular groove, and when adjusting the closing height of the punch assembly, the adjusting head is rotated to make the positioning bead fall into a suitable long groove on the external thread of the matching punch or adjusting head, and the closing height of the punch assembly can be adjusted according to needs by means of the spiral retaining ring clamping.

[0009] The utility model indexing sleeve is in the shape of a circular basin, and its upper end is provided with indexing grooves whose number is a multiple of the number of punch core assemblies, and at least two notches are evenly distributed on the annular convex rib clamping ring arranged under the indexing groove, and the shape and size of one of the notches are different from the shapes and sizes of the other notches; the outer diameter of the lower part of the indexing sleeve is adapted to the upper inner cavity of the upper mold body, and a longitudinal guide keyway is also provided thereon, which is slidably matched with the guide key fixed on the inner cavity wall of the upper mold body, and the indexing sleeve can slide up and down in the inner cavity of the upper mold body and be circumferentially stopped and positioned in the indexing sleeve; the core part of the lower end surface of the inner cavity of the indexing sleeve is provided with a through hole which is slidably matched with the core shaft; at least two longitudinal through holes for accommodating the adjusting heads of the multi-punch core assemblies are evenly distributed around the core part on the lower end surface of the inner cavity of the indexing sleeve.

[0010] The utility model has a round rod-shaped lower end of a core shaft that is fastened to the lower part of the core of an upper die body, and the upper end of the core shaft is inserted into a countersunk hole at the lower part of a punch head; a convex shoulder at the upper part of the core shaft is placed on the end face of the core of the lower end face of an inner cavity of a dividing sleeve, and at least two material-removing springs that surround the core shaft inside the upper die body and are evenly distributed along the longitudinal direction are pressed between the upper die body and the dividing sleeve; a retaining ring groove is provided above the core shaft convex shoulder for installing a retaining ring, and a multi-punch retaining ring assembly is looped between the convex shoulder and the retaining ring.

[0011] The utility model discloses a punch retaining ring assembly which is circumferentially positioned between the upper shaft shoulder of the mandrel and the shaft retaining ring, and is composed of a retaining ring and a latch. The retaining ring is in the shape of a D-shaped disc, and a latch is fixedly arranged vertically upward on the disc opposite to the circular portion of the retaining ring, and the latch is inserted into the lower end surface of the die head, so that the retaining ring and the die head are positioned in the circumferential direction. When the circular portion of the D-shaped retaining ring is aligned with a punch assembly to be punched, the punch assembly avoids, thereby releasing the obstruction and entering the state to be punched, and the annular grooves on the adjusting heads of the other punch assemblies are hung on the retaining ring of the retaining ring assembly, so as to avoid entering the state to be punched.

[0012] The stripping plate retaining ring assembly of the utility model presents a pressing structure, which is composed of a retaining ring, equal height screws and a compression spring; the disc-shaped retaining ring is installed in the countersunk hole of the core part of the lower end surface of the upper mold body by means of the equal height screws and the compression spring; the stripping plate can be quickly removed by pressing the retaining ring; and the retaining ring is released, and the compression spring resets the retaining ring to retain the stripping plate.

[0013] The utility model provides a punch head assembly arranged at the uppermost end of the upper die device, which is composed of a punch head, a positioning bead, a striking head and a fastening screw; the punch head is roughly disc-shaped, and the upper edge of the punch head is provided with no less than two equally divided hole grooves matching the telescopic stop pins on the CNC turret punch press, the number of equally divided hole grooves is the same as the number of the punch core assembly, the outer diameter of the lower part of the hole groove is positioned and matched with the inner hole of the upper part of the indexing sleeve, and a positioning bead is provided that matches the orientation of the indexing groove on the indexing sleeve; the lower end of the punch head is provided with no less than two opening shape measuring scales on the raised ring rib on the indexing sleeve The die head assembly is provided with a convex buckle which is matched with the size and distribution. When the convex buckle is inserted into it and rotated slightly, the die head assembly and the indexing sleeve are buckled together, and the two are axially stopped. They can only be disengaged when they are in the above-mentioned calibrated position; a circular hole for installing a latch of a multi-punch core retaining ring assembly is provided in the lower end surface of the die head, and the circular hole maintains the same orientation as one of the above-mentioned equally divided hole grooves to ensure that the above-mentioned each punch core assembly to be punched maintains the same orientation as the machine tool; the lower end of the die head is also offset and fixed with a striking head which is matched with the adjusting head of the multi-punch core assembly, and the orientation of the striking head is also maintained in the same orientation as one of the above-mentioned divided hole grooves.

[0014] The lower die device described in the utility model is composed of a lower die body, a lower die core, a fastening screw and a disc brush. The shape of the lower die body is adapted to the lower die cavity of an applicable CNC turret punch press. The same number of lower die cores are evenly distributed at positions corresponding to at least two punch core assemblies evenly distributed inside the above-mentioned upper die body, and are fastened with fastening screws. The inner holes of the countersunk holes for installing the lower die cores are regularly provided with straight grooves for circumferential positioning of the lower die cores; a positioning pin adapted to the positioning straight groove of the lower die body is fixed on the outer diameter of each lower die core, and the orientation of the positioning pin matches the guide key on the punch core assembly of the upper die body; a disc-shaped brush is also provided on the upper end surface of the lower die body to reduce the wear marks on the lower die device on the processed sheet material. Each lower die core can adopt the standard lower die of an applicable CNC turret punch press, or it can be set according to needs.

[0015] The utility model has the advantages that it can be used on the standard workstations of CNC turret punch presses, can tap the potential of machine tool workstations, actually increase the number of workstations of CNC turret punch presses, and improve processing capacity; the device has a novel structure and is flexible and convenient to operate; the utility model can also make full use of the existing standard multiple small workstation punch cores and lower die cores of CNC turret punch presses, and has a high degree of standardization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a cross-sectional view of the structure of the upper die device of the utility model;

[0017] Figure 2 This is a cross-sectional view of the structure of the lower mold device of the utility model;

[0018] Figure 3-1 / Figure 3-2It is a three-dimensional structural diagram of the upper mold body in the upper mold device of the utility model;

[0019] Figure 4-1 / Figure 4-2 It is a three-dimensional diagram of the structure of the indexing sleeve in the upper die device of the utility model;

[0020] Figure 5 It is a three-dimensional structural diagram of the punch head retaining ring assembly in the upper die device of the utility model;

[0021] Figure 6 It is a three-dimensional structural diagram of the die head assembly in the upper die device of the utility model. DETAILED DESCRIPTION

[0022] like Figure 1 The upper die device 01 with eight punches in this embodiment is shown as a schematic structural diagram. The upper die device 01 is composed of an upper die body 01-1, a core shaft 01-2, a dividing sleeve 01-3, a guide key 01-4, 8 stripper plates 01-5, a main stripper spring 01-6, 8 auxiliary stripper springs 01-7, 8 punch assemblies 0101, a punch head retaining ring assembly 0102, a stripper plate retaining ring assembly 0103, a punch head assembly 0104 and a fastening screw 01-8.

[0023] like Figure 2 The structure diagram of the lower die device 02 with eight punches in this embodiment is shown. The lower die device 02 is composed of a lower die body 02-1, eight lower die cores 02-2, eight set screws 02-3 and a disc brush 02-4.

[0024] like Figure 1 / Figure 3-1 / Figure 3-2The outer shape of the upper die body 01-1 of the upper die device 01 shown is compatible with the upper die cavity of the D station of the applicable CNC turret punch press, and a circular inner cavity 01-1-1 adapted to the outer diameter of the indexing sleeve 01-3 is provided on the upper part thereof, and a guide key 01-4 is also provided on the wall of the inner cavity 01-1-1, and the indexing sleeve 01-3 can slide up and down in the inner cavity 01-1-1 of the upper die body 01-1 and be positioned circumferentially in the upper die body 01-1, and a countersunk hole 01-1-2 for installing the main material withdrawal spring 01-6 and a countersunk hole 01-1-3 of the core shaft 01-2 are provided on the end face core of the inner cavity 01-1-1, and 8 longitudinal guide through holes 01-1-4 for installing the multi-punch core assembly 0101 are evenly distributed around the countersunk hole of the inner cavity 01-1-1, and each guide through hole is provided with a guide groove 01-1-5 with the same orientation, and the lower end of each guide through hole 01-1-4 is provided with a U-shaped opening facing A U-shaped groove 01-1-6 which is open toward the core and the bottom and convex in the middle, is adapted to a disc-shaped stripping plate 01-5 with an annular groove on the outer diameter. Eight countersunk holes 01-1-7 for installing auxiliary stripping springs 01-7 are arranged on the end face of the inner cavity 01-1-1 of the upper mold body 01-1 at intervals from the longitudinal guide through hole 01-1-4. A large countersunk hole 01-1-8 for installing the stripping plate retaining ring assembly 0103 is provided in the core of the lower end face of the upper mold body 01-1. Small countersunk holes 01-1-9 for installing four compression springs 0103-2 and screw holes 01-1-10 for installing four equal height screws 0103-3 are evenly distributed on the end face of the large countersunk hole 01-1-8. The core of the lower end face of the upper mold body 01-1 is also provided with a small countersunk hole 01-1-11 for installing the fastening screw 01-8 for fastening the core shaft 01-2.

[0025] like Figure 1The eight punch assemblies 0101 of the upper die device 01 shown in the figure have the same structure except for the cutting edge 0101-1-3, and are composed of a punch 0101-1, an adjusting head 0101-2, a spiral clamp 0101-3 and a positioning bead 0101-4. The head of the long rod-shaped punch 0101-1 is provided with an external thread, and four long grooves 0101-1-1 are evenly distributed thereon. A guide key 0101-1-2 is fixedly provided on the guide rod portion in the middle, and is slidably matched with the eight longitudinal guide through holes 01-1-4 on the upper die body 01-1 and the guide key groove 01-1-5 thereon. The lower part is a blanking blade 0101-1-3. The punch of this embodiment adopts A process The adjusting head 0101-2 is a short rod with an annular groove 0101-2-1 on the upper part, and its lower end is provided with an internal thread matched with the upper part of the punch 0101-1. The outer part of the lower end is also provided with an annular groove for installing a spiral clamp 0101-3 and a small round hole for installing a positioning bead 0101-4 in the groove. The adjusting head 0101-2 is rotated to make the positioning bead 0101-4 fall into a suitable long groove 0101-1-1 on the upper external thread of the matching punch 0101-1, and the spiral clamp 0101-3 is used to lock the position, so as to adjust the closing height of each punch assembly 0101.

[0026] like Figure 1 / Figure 4-1 / Figure 4-2 The indexing sleeve 01-3 of the upper mold device 01 shown in the figure is in the shape of a circular basin, and is provided with 8 indexing grooves 01-3-1 at its upper end, and a raised ring rib 01-3-2 is provided at the lower part of the indexing groove 01-3-1, and 4 notches 01-3-3 are provided on the ring rib 01-3-2, and the size of one notch is smaller than that of the other three notches; the outer diameter 01-3-4 of the lower part of the indexing sleeve 01-3 is adapted to the inner cavity 01-1-1 of the upper part of the upper mold body 01-1, and it is also provided with a groove 01-3-4 that is adapted to the inner cavity 01-1-1 of the upper mold body 01-1. -1-1, the guide key 01-4 fixed on the wall is slidably matched with the longitudinal guide keyway 01-3-5, the dividing sleeve 01-3 can slide up and down in the inner cavity 01-1-1 of the upper mold body 01-1 and be circumferentially stopped and positioned with the dividing sleeve 01-3; the core part of the lower end surface of the inner cavity of the dividing sleeve 01-3 is provided with a through hole 01-3-6 that is slidably matched with the core shaft 01-2; 8 longitudinal through holes 01-3-7 are evenly distributed around the core part on the lower end surface of the inner cavity of the dividing sleeve 01-3 for accommodating the adjusting head 0101-2 of the multi-punch assembly 0101.

[0027] like Figure 1 / Figure 3-1 / Figure 3-2 The lower end of the round rod-shaped mandrel 01-2 of the upper die device 01 is fastened to the countersunk hole 01-1-11 at the lower part of the core of the upper die body 01-1 by means of screws 01-8, and the upper end of the mandrel 01-2 is inserted into the countersunk hole 0104-1-4 at the lower part of the punch head assembly 0104 (see Figure 6); the boss on the upper part of the mandrel 01-2 rests on the end face of the core of the lower end face of the inner cavity of the dividing sleeve 01-3, and the ejection spring 01-6 of the core of the upper mold body 01-1 surrounding the mandrel 01-2 and 8 auxiliary ejection springs 01-7 arranged at intervals 01-1-7 on the inner cavity end face and uniformly distributed longitudinally and with respect to the longitudinal guide through hole 01-1-4 are pressed between the upper mold body 01-1 and the dividing sleeve 01-3; a shaft retaining ring 01-9 is provided above the boss of the mandrel 01-2, and a multi-punch head retaining ring assembly 0102 is looped between the boss and the retaining ring 01-9.

[0028] like Figure 1 and Figure 5 The punch head retaining ring assembly 0102 of the upper die device 01 shown in the figure is composed of a retaining ring 0102-1 and a latch 0102-2; the retaining ring 0102-1 is in the shape of a D-shaped disc, and a latch 0102-2 is fixed vertically upward on the disc opposite to the circular portion of the retaining ring, and the latch 0102-2 is inserted into the lower end surface 0104-1-3 of the punch head 0104 (see Figure 6 ), so that the retaining ring 0102 and the die head 0104 are positioned circumferentially. When the notched portion of the D-shaped retaining ring 0102-1 is aligned with a punch core assembly 0101 to be punched, the punch core assembly 0101 is unblocked and enters a state to be punched. The annular groove 0101-2-1 of the die head 0101-2 on the other punch core assemblies 0101 is hung on the retaining ring 0102-1 of the retaining ring assembly 0102 to avoid entering a state to be punched.

[0029] like Figure 1 and Figure 3-2 The stripping plate retaining ring assembly 0103 of the upper mold device 01 shown is a press-type structure, which is composed of a retaining ring 0103-1, 4 equal-height screws 0103-2 and 4 compression springs 0103-3; the disc-shaped retaining ring 0103-1 is installed in the 4 screw holes 01-1-10 and 4 small countersunk holes 01-1-9 in the large countersunk hole 01-1-8 on the lower end surface of the upper mold body 01-1 by means of the equal-height screws 0103-2 and the compression springs 0103-3; by pressing the retaining ring 0103-1, the stripping plate 01-5 can be quickly removed from the core of the lower end surface of the upper mold body 01-1; releasing the retaining ring 0103-1, the compression spring 0103-3 is reset, and the retaining ring 0103-1 blocks the stripping plate 01-5.

[0030] like Figure 1 and Figure 6As shown, the die head assembly 0104 disposed at the uppermost end of the upper die device 01 is composed of a die head 0104-1, a positioning bead 0104-2, a striking head 0104-3 and fastening screws 0104-4 / 0104-5. The die head 0104-1 is roughly disc-shaped, and the upper edge of the die head 0104-1 is evenly distributed with 8 equally divided keyways 0104-1-1 that match the stop pins of the CNC turret punch press. The lower outer diameter 0104-1-6 of the keyway 0104-1-1 is positioned and matched with the upper inner hole 01-1-1 of the indexing sleeve 01-3, and is provided with a positioning bead 0104-104 that matches the indexing groove on the indexing sleeve 01-3. 4-2, and fastened with a set screw 0104-4; the lower end of the punch head 0104-1 is provided with four convex buckles 0104-1-2, which are matched with the shape, number, size and distribution of the openings 01-3-3 on the raised ring rib 01-3-2 on the indexing sleeve 01-3. When the convex buckles 0104-1-2 are inserted therein and slightly rotated, the punch head assembly 0104 and the indexing sleeve 01-3 are buckled, and the two axes are aligned. The two can only be disengaged when they are in the above-mentioned calibrated position; a circular hole 0401-1-3 for installing the latch 0102-2 of the multi-punch retaining ring assembly 0102 is provided on the lower end surface of the punch head 0104-1. The circular hole 0401-1-3 and one of the above-mentioned indexing grooves 0401-1-1 (the 0401-1-1 in this example) maintain the same orientation to ensure that the above-mentioned punch core assemblies to be punched are Maintain the same orientation with the machine tool; the straight portion of the D-shaped small boss 0401-1-5 at the lower end of the die head 0104 is also placed against a square striking head 0104-3 that is compatible with the adjusting head 0101-2 of the punch core assembly 0101, and is fastened with a fastening screw 0104-5. The orientation of the square striking head 0104-3 is consistent with one of the above-mentioned dividing grooves 0401-1-1 (in this case, it is 0401-1-1).

[0031] like Figure 2The lower mold device 02 shown is composed of a lower mold body 02-1, a lower mold core 02-2, a fastening screw 02-3 and a brush 02-4. The outer shape of the lower mold body 02-1 is compatible with the lower mold cavity of the applicable CNC turret punch press D station, and eight lower mold cores 02-2 are evenly distributed on the upper end surface thereof at positions corresponding to the eight punch core assemblies 0101 evenly distributed inside the above-mentioned upper mold body 01-1, and are fastened with fastening screws 02-3. A locating pin 02-2-1 compatible with the lower mold body 02-1 is fixed on the outer diameter of each lower mold core 02-2, and the orientation of the locating pin 02-2-1 matches the guide key 0101-1-1 on the eight punch core assemblies 0101 on the upper mold body 01-1. A circular brush 02-3 is also provided on the upper end surface of the lower mold body 02-1 to reduce the wear marks on the upper surface of the lower mold device on the processed sheet material; this embodiment adopts the standard lower mold core of the A station, and can also be set according to needs. The utility model arranges 8 punch core dies on a standard rotating D-station die cavity, utilizes the upper and lower die rotating structures, and rotates and aligns according to system instructions, so that a punch core in one of the preset punch core assemblies matches a preset corresponding lower die core, and performs set alignment punching.

Claims

1. A multi-punch die for a CNC turret punch press, comprising an upper die device and a lower die device, wherein the upper die device is composed of an upper die body, multiple punch core assemblies, a dividing sleeve, a mandrel, multiple punch retaining ring assemblies, a guide key, a punch head assembly, a stripper plate retaining ring assembly, a stripper spring assembly, multiple stripper plates, retaining rings and fastening screws; the lower die device is composed of a lower die body, multiple lower die cores, fastening screws and a disc brush; characterized in that, At least two punch assemblies are evenly distributed longitudinally around the core shaft inside the upper die body of the upper die device; at least two indexing grooves matching the orientation of the punch assemblies are evenly distributed on the upper part of the indexing sleeve which is arranged in the upper inner cavity of the upper die body and can slide up and down, and at least two through holes are evenly distributed on the lower inner end surface thereof to accommodate the upper adjustment head of the punch assembly on the upper die body; the guide key arranged in the upper inner cavity of the upper die body keeps the positioning beads on the upper outer circle of the punch head assembly with a striking head at the lower part, the indexing groove on the indexing sleeve and the punch assembly in a directional manner; the annular convex rib clamp arranged under the indexing groove There are no less than two notches evenly distributed on the ring, and the shape and size of one of the notches are different from those of the other notches. When a number of convex buckles that match no less than two notches under the above-mentioned indexing grooves are evenly distributed on the lower end of the die head assembly and inserted into them and slightly rotated, the die head assembly and the indexing sleeve are buckled together, and the two are axially stopped; when working, when one of the hole slots with the same number of evenly distributed holes around the head of the die head assembly as the punch core assembly is circumferentially stopped by a telescopic pin set on the CNC turret punch press, the upper die body can rotate together with the indexing sleeve around the die head. When the fixed hole slot on the die head is When the positioning ball falls into the indexing groove set on the indexing sleeve, the striking head fixed at the lower end of the die head is aligned with the adjusting head set in the above-mentioned punch core assembly. At this time, one group of the punch core assembly is in the position to be punched; the upper end is inserted into the core of the die head assembly and the lower end is fastened to the upper shoulder of the core shaft of the upper die body. There is a punch core retaining ring assembly in the loop between the upper shoulder and the shaft retaining ring. The D-shaped retaining ring is fixed with a pin on the opposite end face of its missing round part. The pin is inserted at the lower end of the die head assembly. This retaining ring assembly allows the missing round part of the retaining ring to avoid the adjusting head of the punch core assembly to be punched, thereby releasing the obstruction. , the retaining ring assembly hangs the adjusting head annular grooves of at least two other punch core assemblies on the retaining ring of the retaining ring assembly to avoid entering the waiting state; a boss is also provided at the lower part of the mandrel equipped with the punch core retaining ring assembly, and the boss presses at least two stripping springs around the mandrel inside the upper mold body and evenly distributed along the longitudinal direction between the upper mold body and the indexing sleeve; the retaining ring assembly that can quickly replace the stripping plate and is arranged on the lower end surface of the upper mold body blocks the disc-shaped stripping plates with annular grooves on the outer diameter of at least two multi-punch core assemblies at the lower end of at least two inwardly opening annular grooves at the lower end of the upper mold body; The lower die body of the lower die device and the upper die body are evenly distributed with the same number of lower die cores at corresponding positions of at least two punch core assemblies evenly distributed inside the upper die body, and the blade shapes of the corresponding upper die punches and lower die cores are matched.

2. The multi-punch die for a CNC turret punch press according to claim 1, characterized in that: The outer shape of the upper mold body is compatible with the mold cavity of the applicable CNC turret punch press. The upper part of the upper mold body is provided with a circular inner cavity that is compatible with the outer diameter of the indexing sleeve. The inner cavity wall is also provided with a longitudinal guide key. The indexing sleeve can slide up and down in the inner cavity of the upper mold body and be positioned circumferentially with the indexing sleeve. The core part of the end face of the inner cavity is provided with a countersunk hole for installing the core shaft and the stripping spring. There are at least two longitudinal guide through holes for installing the punch core assembly evenly distributed around the countersunk hole. Each guide through hole is provided with a guide groove with the same orientation. The lower end part of each guide through hole is provided with a U-shaped groove with a U-shaped opening facing the core, an open bottom and a convex middle part. The U-shaped groove is compatible with a stripping plate that is disc-shaped and has an annular groove on the outer diameter. At least two countersunk holes for installing auxiliary stripping springs can be arranged on the upper end face of the inner cavity at intervals with the longitudinal guide through holes according to needs. The core part of the lower end face of the upper mold body is provided with a countersunk hole for installing the stripping plate retaining ring assembly. The inner end face of the countersunk hole is evenly distributed with small countersunk holes for installing compression springs and screw holes for installing equal height screws.

3. The multi-punch die for a CNC turret punch press according to claim 1 or 2, characterized in that: Except for the cutting edge, all punch assemblies have the same structure, consisting of a punch, an adjusting head, a spiral retaining ring and a positioning bead; the head of the punch is provided with an internal thread or an external thread, and a guide key is fixedly provided on the central guide rod portion, which is slidably matched with the longitudinal guide through hole on the upper die body and the guide keyway thereon. The punch can adopt a standard punch of a suitable CNC turret punch press, or it can be set as needed; the adjusting head is in the shape of a short rod, and its lower end is provided with an internal thread or an external thread matching the head of the punch. The punch or adjusting head with an external thread is evenly provided with at least one long groove on its external thread. The punch or adjusting head with an internal thread is provided with an annular groove and a small round hole for installing the positioning bead on the external cylindrical body of the internal thread, and a spiral retaining ring is provided on the annular groove. When adjusting the closing height of the punch assembly, the adjusting head is rotated to make the positioning bead fall into a suitable long groove on the external thread of the matching punch or adjusting head. With the help of the spiral retaining ring, the closing height of the punch assembly can be adjusted as needed.

4. The multi-punch die for a CNC turret punch press according to claim 3, characterized in that: The indexing sleeve is in the shape of a circular basin, and its upper end is provided with indexing grooves whose number is a multiple of the number of the punch core assemblies. There are at least two notches evenly distributed on the annular convex rib retaining ring arranged under the indexing grooves, and the shape and size of one of the notches are different from the shapes and sizes of the other notches; the outer diameter of the lower part of the indexing sleeve is adapted to the upper inner cavity of the upper mold body, and it is also provided with a longitudinal guide keyway that is slidably matched with the guide key fixed on the inner cavity wall of the upper mold body, and the indexing sleeve can slide up and down in the inner cavity of the upper mold body and be circumferentially stopped and positioned by the indexing sleeve; the core part of the lower end surface of the inner cavity of the indexing sleeve is provided with a through hole that is slidably matched with the core shaft; at least two longitudinal through holes for accommodating the adjusting heads of the multiple punch core assemblies are evenly distributed around the core part on the lower end surface of the inner cavity of the indexing sleeve.

5. The multi-punch die for a CNC turret punch press according to claim 4, characterized in that: The lower end of the round rod-shaped core shaft is fastened to the lower part of the core of the upper mold body, and the upper end of the core shaft is inserted into the countersunk hole at the lower part of the die head; the convex shoulder on the upper part of the core shaft rests on the end face of the core of the lower end face of the inner cavity of the dividing sleeve, and at least two material withdrawal springs surrounding the core shaft inside the upper mold body and evenly distributed along the longitudinal direction are pressed between the upper mold body and the dividing sleeve; a retaining ring groove is provided above the core shaft shoulder for installing the retaining ring, and a multi-punch retaining ring assembly is loosely inserted between the convex shoulder and the retaining ring.

6. The multi-punch die for a CNC turret punch press according to claim 5, characterized in that: The punch retaining ring assembly is slidable between the upper shoulder of the mandrel and the shaft retaining ring, and is composed of a retaining ring and a latch. The retaining ring is in the shape of a D-shaped disc, and a latch is fixed vertically upward on the disc opposite to the missing circular part. The latch is inserted into the lower end surface of the die head to position the retaining ring and the die head circumferentially. When the yielding missing circular part of the D-shaped retaining ring is aligned with a punch core assembly to be punched, the punch core assembly avoids, thereby releasing the obstruction and entering the state to be punched, and the annular grooves on the adjusting heads of the remaining punch core assemblies are hooked on the retaining rings of the retaining ring assembly to avoid entering the state to be punched.

7. The multi-punch die for a CNC turret punch press according to claim 3, characterized in that: The stripper plate retaining ring assembly is a press-type structure, consisting of a retaining ring, equal-height screws and a compression spring; the disc-shaped retaining ring is installed in the countersunk hole at the core of the lower end surface of the upper mold body by means of the equal-height screws and the compression spring; the stripper plate can be quickly removed by pressing the retaining ring; the retaining ring is released, and the compression spring resets the retaining ring to block the stripper plate.

8. The multi-punch die for a CNC turret punch press according to claim 1, characterized in that: The lower die device is composed of a lower die body, a lower die core, fastening screws and a disc brush. The shape of the lower die body is compatible with the lower die cavity of a suitable CNC turret punch press. The same number of lower die cores are evenly distributed at positions on the upper part corresponding to the at least two punch core assemblies evenly distributed inside the above-mentioned upper die body, and are fastened with fastening screws. The inner holes of the countersunk holes for installing the lower die cores are regularly provided with straight grooves for circumferential positioning of the lower die cores; a positioning pin compatible with the positioning straight groove of the lower die body is fixed on the outer diameter of each lower die core, and the orientation of the positioning pin matches the guide key on the punch core assembly of the upper die body; a disc-shaped brush is also provided on the upper end surface of the lower die body to reduce the wear marks on the lower die device on the processed sheet material.

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