Upper die device with adjustable closing height for numerical control turret punch press

Abstract

The utility model relates to an upper die device with adjustable closing height for a numerical control turret punch press, which is used for a punch press die punching device and comprises an adjusting head component and an upper die body connected with the adjusting head component. The adjusting head assembly is composed of an adjusting head body, an adjusting ring, an adjusting base, a reset spring, a compressed spring steel ball, a rotating steel ball, a stop steel ball, a spiral clamping ring, an end cover, a fastening screw and the like. The upper die device is mainly used on a forming die which needs to adjust the closing height of the upper die device according to the forming height and the plate thickness. The utility model has the advantages that on a machine tool, the closing height of the upper die can be manually and bidirectionally adjusted in real time, and the closing height can be continuously adjusted and also can be adjusted at small intervals; the device is novel in structure, simple and convenient to adjust and reliable to use.

Description

Technical Field

[0001] The utility model relates to a punching die device of a punch press, in particular to an upper die device with adjustable closing height of a numerically controlled turret punch press. Background Art

[0002] The upper die closing height of currently used CNC turret punch presses, especially forming dies, is generally designed based on a specific forming height and sheet thickness. Changes in product forming height or sheet thickness often require modification of certain components, increasing workload and impacting production efficiency. While some dies have adjustable closing height, their complex structure, inconvenient operation, and high price limit their widespread application. In particular, they cannot be adjusted on the machine in real time or at small intervals, failing to meet on-site needs. Summary of the Invention

[0003] The purpose of the utility model is to provide an upper die device with adjustable closing height for a CNC turret punch press, which can adjust the closing height of the upper die in real time, has a simple structure, is easy to operate, has a low manufacturing cost, and can be adjusted in small intervals.

[0004] The technical solution of the utility model is: 1. The upper die device of the CNC turret punch press with adjustable closing height includes an adjusting head assembly and an upper die body connected thereto, characterized in that the adjusting head assembly consists of an adjusting head body, an adjusting ring, an adjusting base, a reset spring, a compression spring steel ball, a rotating steel ball, a stop steel ball, a spiral clamp, an end cover and a fastening screw; the adjusting ring slides on the middle shaft neck of the adjusting head body, and the end of the inner hole without a hole groove rests on the upper shaft shoulder of the adjusting head body; a rotating steel ball and a stop steel ball are respectively placed in the relevant hole grooves of the adjusting ring and the adjusting head body; a compression spring steel ball is provided at each end of the centripetal long arc groove with semicircles at both ends formed by the adjusting ring and the adjusting head body, and a cylindrical The shaped return spring is pre-compressed and bent in the centripetal long arc groove by the compression spring steel balls at both ends; when the stop steel ball is aligned with at least one of the evenly distributed longitudinal circular grooves of the small disc on the upper part of the adjusting base, the small disc on the upper part of the adjusting base is just inserted into the annular groove on the step end face formed by the middle shaft neck and the lower shaft head of the adjusting head body. When the upper part of the adjusting base is placed on the bottom of the annular groove, the spiral retaining ring arranged on the annular groove below the lower shaft head of the adjusting head body stops the adjusting head body and the adjusting head base axially; a protruding square key is provided on the inner hole of the end cover fixed on the lower end face of the adjusting base, and the square key can be connected with the longitudinal keyway on the guide screw which is arranged on the upper part of the upper mold body and flexibly matched with the internal thread of the core part of the above-mentioned adjusting head body. Slide up and down and rotate to stop; when changing the closing height of the upper mold, turn the adjusting ring of the outer ring of the adjusting head combination by hand, and the adjusting ring drives the compression spring steel ball at one end to push the reset spring until the arc at one end of the centripetal semicircular groove set on the inner wall of the lower end of the adjusting ring is spun on the rotating steel ball of the adjusting head body. At this time, when the stop steel ball pressed on the longitudinal arc groove of the adjusting head body and the adjusting head seat is aligned with one of the two longitudinal semicircular grooves on the inner wall of the lower end of the adjusting ring, the stop steel ball gives way and the mechanism is unlocked. At this time, the adjusting ring of the outer ring of the adjusting head combination can be rotated continuously in both directions, and the rotating steel ball drives the adjusting head body to rotate, because the guide screw that is movably connected to the internal thread of the core of the adjusting head body is adjusted to the end cover on the lower end face of the base. The square key on the inner hole rotates to a stop position, and the adjusting head body can only move up and down along the keyway on the guide screw, thereby changing the closing height between the adjusting head body and the bottom of the upper mold body. The adjustment range of the closing height depends on the screwing length of the guide screw and the core thread of the adjusting head body; the minimum adjustment spacing of the upper mold device depends on the pitch of the guide screw and the number of longitudinal circular grooves on the small disc on the upper part of the adjustment base; after adjusting the closing height, stop rotating the adjusting ring of the outer ring of the adjusting head assembly, reset spring reset, and rotate the steel ball reset to the middle of the centripetal arc groove on the inner wall of the lower end of the adjusting ring. At this time, the stop steel ball is pressed by the inner hole of the adjusting ring to the middle position of the two semicircular longitudinal grooves on the inner wall of the lower end, and the adjusting head assembly mechanism is locked.

[0005] The core of the adjusting head body described in the utility model is provided with an internal thread, and the upper end of the outer diameter thereof is provided with a boss, and below the boss is a middle shaft neck that slides with the inner hole of the above-mentioned adjusting ring, and an annular groove is provided on the step end face formed by the middle shaft neck and the lower shaft head, and the depth of the annular groove is greater than the diameter of the stop steel ball, and a radial circular through hole for accommodating the stop steel ball is provided on the middle shaft neck on the outer wall of the annular groove; a centripetal long arc groove with a radial depth slightly greater than half of the compression spring steel ball, an axial depth slightly greater than the entire compression spring steel ball and 1 / 4 circle at both ends is provided on the outer edge step end face of the middle shaft neck opposite to the radial circular through hole; a longitudinal semicircular hole groove with a radial depth of half of the rotating steel ball and a longitudinal depth greater than the rotating steel ball is also provided on the lower part of the middle shaft neck; an annular groove for installing a spiral retaining ring is provided below the lower shaft head of the adjusting head body.

[0006] The adjusting ring described in the present invention is a thin-walled circular ring, the inner diameter of the adjusting ring is slidably matched with the shaft neck in the middle of the adjusting head body, and its length is adapted to the shaft neck in the middle of the adjusting head body; a section of radial depth of half a rotating steel ball, groove depth greater than the diameter of the rotating steel ball, and a centripetal arc groove with 1 / 4 circle at both ends is provided on the inner hole wall at one end of the adjusting ring; two radials are the same as those of the stopping steel ball and the diameter depth is less than the radius of the stopping steel ball on the inner hole wall at the same end of the adjusting ring, the sum of the diameter depth of the radius and the thickness between the shaft neck in the middle of the adjusting head body and the outer wall of the annular groove is equal to the diameter of the stop steel ball, and the depth is greater than the longitudinal semicircular groove of the stopping steel ball, and the center of the two longitudinal semicircular grooves forms a central angle with the center of the adjusting ring It is equal to the central angle of the above-mentioned centripetal circular arc groove; the central angle formed by the center of symmetry of the two longitudinal semicircular grooves and the center of symmetry of the centripetal circular arc groove is equal to the central angle formed by the center of the radial circular hole for accommodating the stopping steel ball and the center of the longitudinal semicircular hole groove for rotating the steel ball on the middle shaft neck of the adjusting head body of the above-mentioned adjusting head combination; on the inner hole wall at the same end of the adjusting ring, at a position corresponding to the above-mentioned adjusting head body, there is a centripetal long circular arc groove with a radial depth greater than half of the compression spring steel ball, an axial depth greater than the entire compression spring steel ball and 1 / 4 circle at both ends. The long circular arc groove and the long circular arc groove at the corresponding position of the adjusting head body are combined into a centripetal long circular arc groove with a diameter greater than the compression spring steel ball and semicircles at both ends.

[0007] The adjusting head seat described in the utility model is a boss-shaped disc with a smaller upper part and a larger lower part. The upper part of the inner hole of the adjusting head seat is slidably fitted with the shaft neck of the lower part of the adjusting head body, and the lower end face of the adjusting head seat is provided with a step stop for accommodating a spiral retaining ring; the small disc on the upper part of the adjusting head seat is just inserted into the annular groove on the step end face formed by the shaft neck in the middle part of the adjusting head body and the lower shaft head, the outer circle of the small disc is slidably fitted with the outer wall of the annular groove, and the upper end face of the small disc is placed on the bottom face of the annular groove; at least one diameter equal to the diameter of the stop steel ball is evenly distributed on the outer diameter of the small disc, the radial depth is the same as the two longitudinal semicircular grooves on the above-mentioned adjusting ring, and the axial depth is greater than the longitudinal circular groove of the stop steel ball, and the number of circular grooves is used to determine the minimum adjustment spacing of the upper mold device; the end face of the adjusting head seat is also evenly distributed with more than two screw holes for installing fastening screws.

[0008] The end cover of the utility model is in the shape of a washer, and a protruding square key is provided in the inner hole of the end cover; more than two round holes are evenly distributed on the end surface of the end cover, which are adapted to the screw holes at the bottom of the adjusting head seat, and the two are connected together by fastening screws.

[0009] The upper die body of the utility model is composed of a guide rod with an external thread on the upper part and a lower die body; the guide screw is provided with a longitudinal keyway that slides with the protruding square key in the inner hole of the end cover; the shape of the die body is adapted to the die cavity of the machine tool, and the lower part and interior of the die body are provided with structures and configurations for performing specific blanking or forming functions.

[0010] The utility model has the advantages that the upper die closing height can be manually and real-timely adjusted in two directions on the machine tool, and can be adjusted continuously or in small intervals; the utility model has a novel structure, is easy to adjust, and is reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural assembly drawing of the utility model;

[0012] Figure 2 This utility model Figure 1 KK section along the middle edge;

[0013] Figure 3 This is a three-dimensional diagram of the adjusting head body of the adjusting head assembly of the present utility model;

[0014] Figure 4 It is a three-dimensional diagram of the adjustment ring of the adjustment head assembly of the utility model;

[0015] Figure 5 This is a three-dimensional diagram of the adjustment base of the adjustment head assembly of the utility model;

[0016] Figure 6 It is a schematic diagram of the end cover of the adjustment assembly of the utility model. DETAILED DESCRIPTION

[0017] like Figure 1 and Figure 2As shown, the specific embodiment of the upper die device with adjustable closed height for a CNC turret punch press of the present invention mainly includes an adjustment head assembly 1 and an upper die body 2 connected thereto. The adjustment head assembly 1 consists of an adjustment head body 1-1, an adjustment ring 1-2, an adjustment base 1-3, a return spring 1-4, two spring steel balls 1-5, a rotating steel ball 1-6, a stop steel ball 1-7, a spiral retaining ring 1-8, an end cap 1-9, and three fastening screws 1-10. The adjusting ring 1-2 is slidably mounted on the middle journal of the adjusting head body 1-1, and the end of its inner hole without a groove is placed on the upper shoulder of the adjusting head body 1-1; a rotating steel ball 1-6 and a stop steel ball 1-7 are respectively placed in the relevant grooves of the adjusting ring 1-2 and the adjusting head body 1-1; a compression spring steel ball 1-5 is provided at each end of the centripetal long arc groove with semicircular ends formed by the adjusting ring 1-2 and the adjusting head body 1-1, and a cylindrical return spring 1-4 is pre-compressed and bent in the long arc groove by the compression spring steel balls 1-5 at both ends; when the stop steel ball 1-7 is aligned with one of the twelve evenly distributed longitudinal circular grooves 1-3-1 of the small disc on the upper part of the adjusting base 1-3, the adjusting The small disc on the upper part of the section base 1-3 is just inserted into the annular groove on the step end face formed by the middle shaft neck and the lower shaft head of the adjusting head body 1-1. When its upper part is placed on the bottom of the annular groove, the spiral retaining ring 1-8 arranged on the annular groove below the lower shaft neck of the adjusting head body 1-1 stops the adjusting head body 1-1 and the adjusting head base 1-3 axially; the end cover 1-9 fixed on the lower end face of the adjusting base 1-3 has a protruding square key 1-9-1 on its inner hole, and the square key 1-9-1 can slide up and down and rotate to stop with the longitudinal keyway 2-1-1 on the guide rod 2-1 which is arranged on the upper part of the upper mold body 2 and is flexibly matched with the internal thread of the core of the above-mentioned adjusting head body 1-1.When the closing height H of the upper die needs to be changed, the adjusting ring 1-2 of the outer ring of the adjusting head assembly 1 is rotated by hand, and the adjusting ring 1-2 drives the compression spring steel ball 1-4 at one end to push the reset spring 1-4 until the arc at one end of the centripetal semicircular groove on the inner wall of the lower end of the adjusting ring 1-2 is rotated on the rotating steel ball 1-6 of the adjusting head body 1-1. At this time, the stop steel ball 1-7 pressed on the longitudinal arc groove of the adjusting head body 1-1 and the adjusting head 1-3 is pressed against the adjusting ring 1- 2. When one of the two longitudinal semicircular grooves 1-2-1 on the inner wall of the lower end is aligned, the stop steel ball 1-7 gives way and the mechanism is unlocked. At this time, the adjusting ring 1-2 of the outer ring of the adjusting head assembly 1 can be rotated continuously in both directions. The rotating steel ball 1-6 drives the adjusting head body 1-1 to rotate. Because the guide screw 2-1 connected to the internal thread of the core of the adjusting head body 1-1 is stopped by the square key 1-9-1 on the inner hole of the end cover 1-9 on the lower end surface of the adjusting base 1-3, the adjusting head body 1-1 It can only move up and down along the keyway 2-1-1 on the guide screw 2-1, thereby changing the closing height H between the adjusting head body 1-1 and the bottom of the upper mold body 2. The adjustment range of the closing height H depends on the screwing length of the guide rod 2-1 and the core thread of the adjusting head body 1-1. Since the screwing length of this mechanism is equivalent to twice the thread diameter, the adjustment range far exceeds the adjustment requirement of the mold closing height H; the minimum adjustment spacing of this mechanism depends on the pitch of the guide rod 2-1 and the number of longitudinal circular grooves 1-3-1 of the small disc on the upper part of the adjusting base 1-3; after adjusting the closing height H, stop rotating the adjusting ring 1-2 of the outer ring of the adjusting head assembly 1, reset spring 1-4 resets, and rotates the steel ball 1-6 resets to the middle of the centripetal arc groove 1-2-2 on the inner wall of the lower end of the adjusting ring 1-2. At this time, the stop steel ball 1-7 is pressed by the inner hole of the adjusting ring 1-2 to the middle position of the two semicircular longitudinal grooves 1-2-1 on the inner wall of the lower end, and the adjusting head assembly 1 mechanism is locked.

[0018] The diameters of the three steel balls described in this embodiment are all 3 mm.

[0019] like Figure 3 and Figure 2The adjusting head body 1-1 in the adjusting head assembly 1 of the present embodiment shown is a core with an internal thread M20X1.25, with a convex shoulder on the upper end of its outer diameter, and a middle shaft neck slidingly matched with the inner hole of the adjusting ring 1-2 below the convex shoulder, and an annular groove is provided on the step end surface formed by the middle shaft neck and the lower shaft head, the depth of which is greater than the diameter of the stop steel ball 1-7, that is, greater than 3mm, and the thickness between the middle shaft neck and the outer wall of the annular groove is 2mm; a radial circular through hole 1-1-1 with a diameter of 3mm for accommodating the stop steel ball 1-7 is provided on the middle shaft neck of the outer wall of the annular groove; On the stepped end face of the outer edge of the middle journal opposite to the hole 1-1-1, there is a centripetal long arc groove 1-1-2 with a radial depth slightly greater than half the diameter of the compression spring steel ball 1-5, that is, slightly greater than 1.5mm, an axial depth slightly greater than the diameter of the entire compression spring steel ball 1-5 by 3mm, and with 1 / 4 circle at both ends; at the lower part of the middle journal is provided an axial semicircular hole groove 1-1-3 with a radial depth of half the diameter of the rotating steel ball, that is, 1.5mm, and an axial depth greater than the rotating steel ball, that is, 3mm; below the lower shaft head of the adjusting head body 1-1 is provided an annular groove 1-1-4 for installing the spiral retaining ring 1-8.

[0020] like Figure 4 and Figure 2The adjusting ring 1-2 in the adjusting head assembly 1 of the present embodiment is a thin-walled circular ring, the inner diameter of which is slidably matched with the middle journal of the adjusting head body 1-1, and the length of which is adapted to the middle journal of the adjusting head body; on the inner hole wall at one end of the adjusting ring 1-2, there is provided a section of centripetal arc groove 1-2-2 with a radial depth of half the rotating 1-6 steel ball, i.e. 1.5mm, a groove depth slightly greater than the diameter of the rotating steel ball 1-6, i.e. 3mm, and 1 / 4 circle at both ends; on the inner hole wall at the same end of the adjusting ring 1-2, there are also two longitudinal centripetal semicircular grooves 1-2-1 with the same centripetal radius as the stopping steel ball 1-7, i.e. 1.5mm, a radial depth of 1mm, and a depth greater than the diameter of the stopping steel ball 1-7, i.e. 3mm, the center angle A formed by the center of the two longitudinal semicircular grooves 1-2-1 and the center of the adjusting ring 1-2 is equal to the center angle A of the above-mentioned centripetal arc groove 1-2-2, and in this embodiment A=20°; the two longitudinal semicircular grooves The central angle B formed by the center of symmetry of the groove 1-2-1 and the center of symmetry of the centripetal arc groove 1-2-2 is equal to the central angle B formed by the center of the radial circular hole 1-1-1 for accommodating the stopping steel ball 1-7 and the center of the longitudinal semicircular hole groove 1-1-3 on the middle shaft neck of the adjusting head body 1-1 of the above-mentioned adjusting head combination 1. In this embodiment, B=90°; on the inner hole wall of the same end of the adjusting ring 1-2, at the corresponding position of the above-mentioned adjusting head body 1-1, there is a centripetal long arc groove 1-2-3 with a radial depth slightly greater than half of the compression spring steel ball 1-5, that is, slightly greater than 1.5mm, an axial depth slightly greater than the entire compression spring steel ball 1-5, that is, 3mm, and with 1 / 4 circle at both ends. The long arc groove 1-2-3 and the long arc groove 1-1-2 at the corresponding position of the adjusting head body 1-1 are combined into a centripetal long arc groove with a diameter slightly greater than the diameter of the compression spring steel ball 1-5, that is, 3mm, and with semicircles at both ends.

[0021] like Figure 5 、 Figure 1 and Figure 2 The adjusting head seat 1-3 in the adjusting head assembly 1 of the present embodiment shown is a boss-shaped disc with a small upper part and a large lower part. The upper part of its inner hole is slidably matched with the lower shaft neck of the adjusting head body 1-1, and the lower end face of the adjusting head 1-3 is provided with a step stop; the small disc on the upper part of the adjusting head seat 1-3 is just inserted into the annular groove on the step end face formed by the middle shaft neck and the lower shaft head of the adjusting head body 1-1, the outer circle of the small disc is slidably matched with the outer wall of the annular groove, and the upper end face of the small disc is placed on the bottom surface of the annular groove; in this embodiment, 12 longitudinal circular grooves with a diameter equal to the diameter of the stop steel ball 1-7, i.e. 3mm, a radial depth of 1mm, and an axial depth greater than the diameter of the stop steel ball 1-7, i.e. greater than 3mm, are evenly distributed on the outer diameter of the small disc. According to the internal thread pitch of the adjusting head body 1-1 of 1.25mm, the minimum adjustment spacing in this embodiment is approximately 0.10mm. The end surface of the adjusting head seat 1-3 is also evenly distributed with three screw holes 1-3-2 for installing fastening screws 1-10.

[0022] like Figure 1The end cover 1-9 in the adjusting head assembly 1 of the present embodiment is in the shape of a washer, and a protruding square key 1-9-1 is provided in its inner hole; three circular holes 1-9-2 are evenly distributed on the end face of the end cover 1-9, which are adapted to the screw holes at the bottom of the adjusting head seat 1-3, with an inner diameter of 4.5 mm, and the two are connected together with three M4X12 fastening screws 1-10.

[0023] like Figure 1 The upper die body 2 in the adjusting head assembly 1 of the present embodiment shown is composed of a guide rod 2-1 with an external thread M20X1.25 on the upper portion and a lower die body 2-2; the guide rod 2-1 is provided with a longitudinal keyway 2-1-1 which is slidably fitted with the protruding square key 1-9-1 in the inner hole of the above-mentioned end cover 1-9; the outer shape of the die body 2-1 is adapted to the die cavity of the machine tool, and its lower portion and interior are provided with structures and configurations for performing specific blanking or forming functions.

Claims

1. The upper die device of a CNC turret punch press with adjustable closing height comprises an adjusting head assembly and an upper die body connected thereto, characterized in that The adjusting head assembly is composed of an adjusting head body, an adjusting ring, an adjusting base, a return spring, a compression spring steel ball, a rotating steel ball, a stop steel ball, a spiral clamp, an end cover and a fastening screw; the adjusting ring slides on the middle shaft neck of the adjusting head body, and the end of its inner hole without a hole groove rests on the upper shaft shoulder of the adjusting head body; a rotating steel ball and a stop steel ball are respectively placed in the relevant hole grooves of the adjusting ring and the adjusting head body; a compression spring steel ball is provided at each end of the centripetal long arc groove with semicircles at both ends formed by the adjusting ring and the adjusting head body, and a cylindrical return spring is pre-compressed and bent in the centripetal long arc groove by the compression spring steel balls at both ends; when the stop steel ball and the small disc on the upper part of the adjusting base are not less than When one of the evenly distributed longitudinal circular grooves is aligned, the small disc on the upper part of the adjusting base is just inserted into the annular groove on the step end face formed by the middle shaft neck of the adjusting head body and the lower shaft head. When the upper part of the adjusting base is placed on the bottom of the annular groove, the spiral clamping ring arranged on the annular groove below the lower shaft head of the adjusting head body stops the adjusting head body and the adjusting head base axially; a protruding square key is provided on the inner hole of the end cover fixed on the lower end face of the adjusting base, and the square key can slide up and down and rotate to stop with the longitudinal keyway on the guide screw which is arranged on the upper part of the upper mold body and matches the internal thread of the core of the above-mentioned adjusting head body; when changing the closing height of the upper mold, turn the adjusting screw by hand. The adjusting ring of the outer ring of the head assembly drives the compression spring steel ball at one end to push the reset spring until the arc at one end of the centripetal semicircular groove on the inner wall of the lower end of the adjusting ring is spun on the rotating steel ball of the adjusting head body. At this time, the stop steel ball pressed on the longitudinal arc groove of the adjusting head body and the adjusting head seat is aligned with one of the two longitudinal semicircular grooves on the inner wall of the lower end of the adjusting ring. The stop steel ball gives way and the mechanism is unlocked. At this time, the adjusting ring of the outer ring of the adjusting head assembly can be rotated continuously in both directions. The rotating steel ball drives the adjusting head body to rotate. The guide screw that is movably connected to the internal thread of the core of the adjusting head body is stopped by the square key on the inner hole of the end cover on the lower end face of the adjusting base. The head body can only move up and down along the keyway on the guide screw, thereby changing the closing height between the adjusting head body and the bottom of the upper mold body. The adjustment range of the closing height depends on the screwing length of the guide screw and the core thread of the adjusting head body; the minimum adjustment spacing of the upper mold device depends on the pitch of the guide screw and the number of longitudinal circular grooves on the small disc on the upper part of the adjusting base; after adjusting the closing height, stop rotating the adjusting ring of the outer ring of the adjusting head assembly, reset the reset spring, and rotate the steel ball to reset to the middle of the centripetal arc groove on the inner wall of the lower end of the adjusting ring. At this time, the stop steel ball is pressed by the inner hole of the adjusting ring to the middle position of the two semicircular longitudinal grooves on the inner wall of the lower end, and the adjusting head assembly mechanism is locked.

2. The upper die device of the CNC turret punch press with adjustable closing height according to claim 1, characterized in that The core of the adjusting head body is provided with an internal thread, and the upper end of the outer diameter thereof is provided with a boss, and below the boss is a middle shaft neck that slides with the inner hole of the above-mentioned adjusting ring, and an annular groove is provided on the step end face formed by the middle shaft neck and the lower shaft head, and the depth of the annular groove is greater than the diameter of the stop steel ball, and a radial circular through hole for accommodating the stop steel ball is provided on the middle shaft neck on the outer wall of the annular groove; a centripetal long arc groove with a radial depth slightly greater than half of the compression spring steel ball, an axial depth slightly greater than the entire compression spring steel ball and 1 / 4 circle at both ends is provided on the outer edge step end face of the middle shaft neck opposite to the radial circular through hole; a longitudinal semicircular hole groove with a radial depth of half of the rotating steel ball and a longitudinal depth greater than the rotating steel ball is also provided on the lower part of the middle shaft neck; an annular groove for installing a spiral retaining ring is provided below the lower shaft head of the adjusting head body.

3. The upper die device of the CNC turret punch press with adjustable closing height according to claim 1 or 2, characterized in that The adjusting ring is a thin-walled circular ring, the inner diameter of which is slidably matched with the shaft neck in the middle of the adjusting head body, and its length is adapted to the shaft neck in the middle of the adjusting head body; a section of radial depth of half a rotating steel ball, groove depth greater than the diameter of the rotating steel ball, and a centripetal arc groove with 1 / 4 circle at both ends is provided on the inner hole wall at one end of the adjusting ring; two radials are the same as those of the stop steel ball and the diameter depth is less than the radius of the stop steel ball on the inner hole wall at the same end of the adjusting ring, the sum of the diameter depth of the radius and the thickness between the shaft neck in the middle of the adjusting head body and the outer wall of the annular groove is equal to the diameter of the stop steel ball, and the depth is greater than the longitudinal semicircular groove of the stop steel ball, and the center angle formed by the center of the two longitudinal semicircular grooves and the center of the adjusting ring is the same as the above The central angles of the centripetal arc grooves are equal; the central angle formed by the symmetric centers of the two longitudinal semicircular grooves and the symmetric centers of the centripetal arc grooves is equal to the central angle formed by the center of the radial circular hole for accommodating the stopping steel ball and the center of the longitudinal semicircular hole groove for rotating the steel ball on the middle shaft neck of the adjusting head body of the above-mentioned adjusting head combination; on the inner hole wall at the same end of the adjusting ring, at a position corresponding to the above-mentioned adjusting head body, there is a centripetal long arc groove with a radial depth greater than half of the compression spring steel ball, an axial depth greater than the entire compression spring steel ball and 1 / 4 circle at both ends. The long arc groove and the long arc groove at the corresponding position of the adjusting head body are combined into a centripetal long arc groove with a diameter greater than the compression spring steel ball and semicircles at both ends.

4. The upper die device of the CNC turret punch press with adjustable closing height according to claim 1 or 2, characterized in that The adjusting head seat is a boss-shaped disc with a smaller upper part and a larger lower part. The upper part of the inner hole of the adjusting head seat is slidably fitted with the shaft neck of the lower part of the adjusting head body, and the lower end face of the adjusting head seat is provided with a step stop for accommodating a spiral retaining ring; the small disc on the upper part of the adjusting head seat is just inserted into the annular groove on the step end face formed by the shaft neck in the middle part of the adjusting head body and the lower shaft head, the outer circle of the small disc is slidably fitted with the outer wall of the annular groove, and the upper end face of the small disc is placed on the bottom face of the annular groove; the outer diameter of the small disc is evenly distributed with at least one diameter equal to the diameter of the stop steel ball, the radial depth is the same as the two longitudinal semicircular grooves on the above-mentioned adjusting ring, and the axial depth is greater than the longitudinal circular groove of the stop steel ball, and the number of circular grooves is used to determine the minimum adjustment spacing of the upper mold device; the end face of the adjusting head seat is also evenly distributed with more than two screw holes for installing fastening screws.

5. The upper die device of the CNC turret punch press with adjustable closing height according to claim 1, characterized in that The end cover is in the shape of a washer, and a protruding square key is provided in the inner hole of the end cover; more than two round holes are evenly distributed on the end surface of the end cover, which are compatible with the screw holes at the bottom of the adjusting head seat, and the two are connected together with fastening screws.

6. The upper die device of the CNC turret punch press with adjustable closing height according to claim 1, characterized in that The upper die body consists of a guide rod with an external thread on the upper part and a lower die body; the guide screw is provided with a longitudinal keyway that slides into the protruding square key in the inner hole of the end cover; the shape of the die body is adapted to the die cavity of the machine tool, and the lower part and interior of the die body are provided with structures and configurations that perform specific blanking or forming functions.

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