CN108772891B - Punching cutter switching mechanism of punching machine - Google Patents
Punching cutter switching mechanism of punching machine Download PDFInfo
- Publication number
- CN108772891B CN108772891B CN201810529714.XA CN201810529714A CN108772891B CN 108772891 B CN108772891 B CN 108772891B CN 201810529714 A CN201810529714 A CN 201810529714A CN 108772891 B CN108772891 B CN 108772891B
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- Prior art keywords
- punching
- seat
- cutter
- driving
- punching cutter
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- 238000004080 punching Methods 0.000 title claims abstract description 173
- 230000007246 mechanism Effects 0.000 title claims abstract description 33
- 238000009434 installation Methods 0.000 claims abstract description 23
- 230000033001 locomotion Effects 0.000 claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims description 27
- 230000001360 synchronised effect Effects 0.000 claims description 24
- 210000000078 claw Anatomy 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 description 16
- 230000013011 mating Effects 0.000 description 13
- 230000008878 coupling Effects 0.000 description 9
- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 239000004745 nonwoven fabric Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/0006—Means for guiding the cutter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
- B26F1/14—Punching tools; Punching dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
- B26D2007/2607—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member for mounting die cutters
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention discloses a punching cutter switching mechanism of a punching machine, which comprises a driving installation seat capable of moving along a cross arm in a straight line, wherein the driving installation seat is provided with a punching cutter connecting seat which is driven by a punching power motor and can move up and down; a punching cutter mounting seat fixedly connected with the cross arm is arranged below the driving mounting seat, and at least two punching cutter mounting rods which are arranged side by side are arranged on the punching cutter mounting seat; the cross arm is fixedly provided with a switching motor for driving the mounting seat to linearly move so that the interface seat of the punching cutter connecting seat is connected with any one punching cutter mounting rod. According to the stamping knife switching mechanism, the switching motor controls the movement stroke of the driving installation seat, so that the stamping knife connection seat can be connected with any stamping knife installation rod, full-automatic switching of the stamping knives is realized, and the replacement efficiency of the stamping knives is improved.
Description
Technical Field
The invention relates to punching equipment in the field of clothing, luggage and footwear processing, in particular to a full-automatic punching machine for punching work on thin materials such as cloth, leather and the like.
Background
In the field of clothing, luggage, footwear processing, it is often necessary to perform punching operations on thin materials such as cloth, leather, and the like. Patent name: non-woven fabrics forming device that punches a hole, patent application number: 201010202137.7A non-woven fabric punching and forming device comprises a pneumatic punching device, a cutting die device, an electric conveying device and a motor box body, wherein the pneumatic punching device is arranged on the upper portion of the device, the cutting die device is connected to the lower portion of the pneumatic punching device, the cutting die device is supported and connected to a top surface platform of the motor box body, and the electric conveying device is arranged on the upper portion of the motor box body. The non-woven fabric punching and forming device disclosed in the patent has low punching efficiency due to the adoption of a pneumatic punching device, and cannot be used for punching rapidly and continuously. The electric conveying device can only unidirectionally transfer materials from an input direction to an output direction, so that only one row of holes can be punched at a time, the electric conveying device cannot control the feeding scale of the materials, the distance between each hole can only be adjusted according to the conveying speed of the electric conveying device when punching, and the distance between each hole cannot be accurately controlled and adjusted. The conveying mechanism of the electric conveying device is a driving wheel and a driven wheel, and can only be used for conveying the hanging belt after extrusion molding, and the application range is limited greatly.
Disclosure of Invention
Aiming at the problems that the prior punching equipment has few punching cutter patterns and is inconvenient to replace punching cutters, the invention provides the punching cutter switching mechanism of the punching machine, and realizes the switching of the punching cutters by automatically connecting the punching cutter connecting seat with a plurality of punching cutter mounting rods.
The technical scheme adopted for solving the technical problems is as follows: a punching cutter switching mechanism of a punching machine comprises a driving installation seat capable of moving along a cross arm in a straight line, wherein a punching cutter connecting seat which is driven by a punching power motor and can move up and down is arranged on the driving installation seat; a punching cutter mounting seat fixedly connected with the cross arm is arranged below the driving mounting seat, and at least two punching cutter mounting rods which are arranged side by side are arranged on the punching cutter mounting seat; the cross arm is fixedly provided with a switching motor for driving the mounting seat to linearly move so that the interface seat of the punching cutter connecting seat is connected with any one punching cutter mounting rod.
In order to optimize the technical scheme, the invention further comprises the following improved technical scheme.
The interface seat is provided with two clamping claws which can clamp the two sides of the stamping knife mounting rod; the stamping knife connecting seat is provided with a connecting cylinder which drives the clamping jaw to rotate so as to realize clamping or loosening actions.
The claw is provided with a rotating part which is rotationally connected with the punching cutter connecting seat through a rotating shaft, a clamping part which rotates around the rotating shaft to open and close, and a cylinder connecting part for driving the claw to rotate.
The cross arm is provided with a linear transmission mechanism which converts the rotation motion of the power shaft of the switching motor into the linear motion of the driving installation seat.
The linear transmission mechanism comprises two first synchronous wheels fixed on the cross arm and a first synchronous belt arranged between the two first synchronous wheels; the driving side first synchronous wheel rotating shaft is connected with the power output shaft of the switching motor, and the belt body of the first synchronous belt is connected with the driving installation seat.
A punching power motor and a first guide structure for guiding the punch cutter connecting seat to move up and down are fixed on the driving mounting seat; the power output shaft of the punching power motor is connected with the punching cutter connecting seat through the punching cutter transmission mechanism.
The punching cutter transmission mechanism comprises a crankshaft connected with the punching power motor, and the upper end of the punching cutter connecting seat is connected with a crank part on the crankshaft through a connecting rod.
The stamping knife mounting rod can move up and down through the second guide structure and is arranged on the stamping knife mounting seat; the punching cutter mounting seat is provided with a spring mounting plate, and a reset spring is arranged between the spring mounting plate and the upper end part of the punching cutter mounting rod.
The second guide structure comprises a guide rail fixed on the punching cutter mounting seat and a sliding block connected with the punching cutter mounting rod; the lower part of the punching cutter mounting rod is sleeved with a pressing sleeve capable of moving up and down, and a buffer spring is arranged between the pressing sleeve and the sliding block.
Compared with the prior art, the stamping knife switching mechanism controls the movement stroke of the driving installation seat through the switching motor, so that the stamping knife connection seat can be connected with any stamping knife installation rod, full-automatic switching of the stamping knife is realized, and the replacement efficiency of the stamping knife is improved.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of the present invention.
Fig. 2 is a schematic perspective view of the feed control module of fig. 1.
Fig. 3 is a schematic perspective view of another angle of fig. 2.
Fig. 4 is a schematic perspective view of a punch knife connecting structure in this embodiment.
Fig. 5 is a schematic view of the cross-sectional internal structure of fig. 4.
Fig. 6 is a schematic perspective view of a punch knife connecting structure in another embodiment.
Fig. 7 is a schematic view of the cross-sectional internal structure of fig. 6.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
Fig. 1 to 7 are schematic structural views of the present invention.
Wherein the reference numerals are as follows: the punching machine comprises a frame 1, a working table 11, a cross arm 12, a long groove 12a, a supporting arm 13, a switching motor 14, a driving mounting seat 2, a punching power motor 21, a crankshaft 22, a guide sleeve 23, a punching tool connecting seat 3, a connecting rod 31, an interface seat 32, a first matching surface 32a, a claw 33, a rotating part 33a, a clamping part 33b, a cylinder connecting part 33c, a second matching surface 33d, a connecting cylinder 34, a groove 34a, a rotating shaft 35, a punching tool mounting seat 4, a spring mounting plate 4a, a punching tool mounting rod 41, a return spring 42, a pressing sleeve 43, a buffer spring 44, a punching tool 45, an X-direction driving motor 5, a clamping seat 51, a linear module 52, a Y-direction driving motor 6, a Y-direction guide rail 61, a Y-direction sliding seat 62, a driving connecting rod 63, a Y-direction transmission gear set 64, a Y-direction synchronous belt 65 and a Y-direction synchronous wheel 66.
Example 1
As shown in fig. 1, the frame structure of the punching machine of the present invention includes a frame 1 having a table top 11. A cross arm 12 for installing a punching mechanism is arranged above the working table 11, and two ends of the cross arm 12 are fixedly connected with the frame 1 through a supporting arm 13.
The cross arm 12 is provided with a driving installation seat 2 which can linearly move along the cross arm 12, and the driving installation seat 2 is provided with a punching cutter connecting seat 3 which is driven by a punching power motor 21 and can move up and down. A die cutter mounting seat 4 fixedly connected with the cross arm 12 is arranged below the driving mounting seat 2, and at least two die cutter mounting rods 41 which are arranged side by side are arranged on the die cutter mounting seat 4. The lower end of each of the die-cutter mounting bars 41 may be connected to a die cutter 45 for punching various types of holes.
The driving mounting seat 2 is slidably arranged on the cross arm 12, and the lower part of the punching cutter connecting seat 3 is provided with an interface seat 32 connected with any one punching cutter mounting rod 41. The cross arm 12 is fixed with a switching motor 14 for driving the driving mounting seat 2 to linearly move so as to connect the interface seat 32 of the die cutter connecting seat 3 with the corresponding die cutter mounting rod 41.
The cross arm 12 is provided with a linear transmission mechanism which converts the rotation motion of a power shaft of the switching motor 14 into the linear motion of the driving installation seat 2. The plurality of die-cutter mounting bars 41 are arranged in the linear movement direction of the driving mounting base 2, and the driving mounting base 2 is moved to the corresponding working position by controlling the working stroke of the switching motor 14, so that the die-cutter connecting base 3 is connected with the die-cutter mounting bar 41 corresponding to the lower part.
In this embodiment, five die cutter mounting bars 41 are disposed on the die cutter mounting base 4, and each die cutter mounting bar 41 can mount a die cutter 45 of a specific size and style. By switching the working position of the motor 14 to control the driving mounting seat 2, any one of the punching cutters 45 can be automatically selected for punching operation, so that the step of replacing the punching cutter 45 is saved, and the punching operation efficiency is improved. The number of die-cutter mounting bars 41 on the die-cutter mounting seat 4 may also be 3, 4, 6 or more.
The punching tool 45 used for a hole at a certain coordinate point can be freely set by the punching machine control system, when the hole is worked, the punching machine control system sends a control command to the switching motor 14 to enable the driving installation seat 2 to move for a set stroke, and the punching tool connection seat 3 is connected with the set punching tool installation rod 41, so that the punching tool 45 is switched.
In a preferred embodiment, the linear drive comprises two first synchronizing wheels fixed to the cross arm 12 and a first synchronizing belt arranged between the two first synchronizing wheels. Wherein the first synchronous wheel rotating shaft on the driving side is connected with the power output shaft of the switching motor 14, and the belt body of the first synchronous belt is connected with the driving installation seat 2. Besides the synchronous belt linear transmission mechanism provided by the preferred embodiment, the linear transmission mechanism can also adopt known modes such as bearing screw transmission, chain transmission, gear rack transmission and the like to convert the rotation power of the motor into linear motion for driving the mounting seat 2.
The cross arm 12, the supporting arm 13 and the frame 1 form a gantry structure, so that the structural rigidity and the bearing capacity are improved, and the punching power motor 21 with higher power, the punching cutter mounting rod 41 with higher rigidity and the punching cutter 45 can be mounted, the punching operation of various thick materials is adapted, and the stability required by high-speed punching can be met.
In the preferred embodiment, the cross arm 12 is a tubular arm having a hollow cavity. Two first synchronizing wheels and a first synchronizing belt are installed in the hollow cavity. The switch motor 14 is fixed to the side wall of the cross arm 12 and is connected to one of the first synchronizing wheels within the cross arm 12. The side wall has an elongated slot 12a and the first timing belt is connected to the drive mount 2 by a timing belt connector passing through the elongated slot 12 a.
A punching power motor 21 and a first guiding structure for guiding the punch cutter connecting seat 3 to move up and down are fixed on the driving mounting seat 2. The power output shaft of the punching power motor 21 is connected with the punching cutter connecting seat 3 through a punching cutter transmission mechanism.
The punching cutter transmission mechanism comprises a crankshaft 22 connected with a punching power motor 21, and the upper end of the punching cutter connecting seat 3 is connected with a crank part on the crankshaft 22 through a connecting rod 31. The drive mount 2 has a housing, which is omitted from fig. 1, on which the crankshaft 22 is rotatably mounted by means of bearings. A gear transmission structure can be further arranged between the punching power motor 21 and the crankshaft 22. For convenience in debugging, a hand wheel can be further arranged on the shell, and the hand wheel can manually drive the crankshaft 22 to rotate through a gear transmission structure.
The invention adopts the punching power motor 21 as the driving force, and the maximum running speed of the punching power motor 21 can exceed 2000 revolutions per minute, so that the maximum punching speed of the invention can also exceed 2000 holes per minute, and the punching efficiency is greatly improved. In actual use, the gear transmission structure can be used for decelerating, so that the working rotation speed of the crankshaft 22 is between 1200 and 2000 revolutions per minute, namely, the number of punched holes per minute is between 1200 and 2000.
The punching power motor 21 and the punching cutter transmission mechanism are arranged on the cross arm 12, so that the area of the workbench surface 11 can be increased, and the punching operation on a large amount of materials is facilitated.
The die-cutter mounting bar 41 is provided on the die-cutter mounting seat 4 so as to be movable up and down by a second guide structure. The die-cutter mounting seat 4 has a spring mounting plate 4a, and a return spring 42 is provided between the spring mounting plate 4a and the upper end portion of the die-cutter mounting rod 41. The punch mounting rod 41 is positioned at a high position under the action force of the return spring 42, so that the punch connecting seat 3 can be conveniently abutted.
The second guide structure includes a guide rail fixed to the die-cutter mounting base 4 and a slider connected to the die-cutter mounting bar 41. The lower part of the punching cutter mounting rod 41 is sleeved with a pressing sleeve 43 capable of moving up and down, and a buffer spring 44 is arranged between the pressing sleeve 43 and the sliding block.
In this embodiment, the first guiding structure is a guiding shaft sleeve 23, and the punching tool connecting seat 3 is inserted into the guiding shaft sleeve 23. The guide shaft sleeve 23 is fixedly connected with the drive mounting seat 2 and guides the punch cutter connecting seat 3 to move up and down. The first guide structure may also adopt a known guide structure such as a guide rail slider and a guide bearing. Similarly, the second guide structure may be a known guide structure such as a bush or a bearing, in addition to the guide rail slider structure.
As shown in fig. 2 and 3, the punching machine sequentially performs punching operations by positioning the feeding mechanism to feed the punching points of the material to the position below the punching blade 45 in the working state and according to the punching coordinate points set on the material.
The positioning and feeding mechanism comprises a clamping seat 51 for clamping materials and a feeding control module, and the feeding control module is connected with an X-direction driving motor 5 and a Y-direction driving motor 6 which receive control signals. The Y-direction driving motor 6 drives the linear module 52 above the working table 11 to linearly move along the Y-coordinate direction of the working plane through the Y-direction transmission assembly. The linear modules 52 are arranged along the X coordinate direction of the working plane. The X-direction driving motor 5 is disposed on the linear module 52, and drives the clamping seat 51 to linearly move along the linear module 52 in the X-coordinate direction through the X-direction transmission assembly.
The feeding control module controls the working strokes of the X-direction driving motor 5 and the Y-direction driving motor 6 according to the input XY coordinate points, so that the materials fixed on the material clamping seat 51 move to the corresponding XY coordinate points. Through software programming, the coordinates of each punching point can be freely set, and the arrangement of the distance between the punching points and the arrangement shape of the punching points is realized. The punch control system also defines the punch blade 45 for each punch point coordinate.
The frame 1 is provided with a Y-direction reference detection sensor for detecting the movement of the linear module 52 to the reference point. The linear module 52 is provided with an X-direction reference detection sensor for detecting the movement of the chuck base 51 to the reference point. At the start of the feeding operation, the X-direction drive motor 5 is operated until the X-direction reference detection sensor detects that the X-direction is located at the reference point, and the Y-direction drive motor 6 is operated until the Y-direction reference detection sensor detects that the Y-direction is located at the reference point.
The feeding control module calculates working strokes of the X-direction driving motor 5 and the Y-direction driving motor 6 according to the difference value between the input XY point coordinates and the reference XY point coordinates, and sends working stroke instructions to the X-direction driving motor 5 and the Y-direction driving motor 6 respectively.
The gantry 1 is fixed with Y-guide rails 61 arranged in the Y-coordinate direction. The linear module 52 is slidably disposed on the Y-rail 61 by a Y-carriage 62 and is connected to the Y-drive assembly.
The Y-direction transmission assembly includes a Y-direction timing belt 65 and Y-direction timing wheels 66 disposed at both ends of the timing belt. The Y-direction driving motor 6 is connected with a Y-direction synchronous wheel 66 at one end of the Y-direction driving motor, and a belt body of the Y-direction synchronous belt 65 is fixedly connected with the Y-direction sliding seat 62.
The Y-direction guide rail 61 and the Y-direction transmission assembly are arranged below the working table 11, the clamping seat 51 and the linear module 52 are positioned above the working table 11, and the material is driven to move along the XY direction of the working table 11.
In the preferred embodiment, the frame 1 is provided with two sets of side-by-side Y-rails 61, and the linear module 52 is fixed with two sets of side-by-side Y-slides 62. Two groups of Y-direction synchronous belts 65 respectively connected with the Y-direction sliding seat 62 are arranged on the frame 1. The Y-direction synchronous wheels 66 of the driving ends of the two groups of Y-direction synchronous belts 65 are connected through the driving connecting rod 63. The middle part of the driving connecting rod 63 is connected with the Y-direction driving motor 6 through a Y-direction transmission gear set 64.
The linear module 52 comprises an aluminum profile shell, X-direction synchronous wheels are respectively arranged at two ends of the aluminum profile shell, and an X-direction synchronous belt connected with the X-direction synchronous wheels is arranged inside the linear module 52. The clamping seat 51 is slidably disposed on the side wall of the linear module 52 through an X-direction sliding seat, and is connected with an X-direction synchronous belt.
The clamping seat 51 is provided with a clamping cylinder for fixing materials. The material can be clamped by the template, the template is installed on the clamping seat 51, and the template is fixed by the clamping cylinder.
As shown in fig. 4 and 5, an interface seat 32 capable of being connected to and disconnected from the die-cutter mounting bar 41 is provided at the lower portion of the die-cutter connecting seat 3, and the interface seat 32 is provided with two claws 33 capable of engaging both sides of the die-cutter mounting bar 41. The punching cutter connecting seat 3 is provided with a connecting cylinder 34 which drives the claw 33 to rotate so as to realize the clamping or loosening action.
The claw 33 has a rotating portion 33a rotatably connected to the die-cutter coupling seat 3 via a rotating shaft 35, an engaging portion 33b rotated about the rotating shaft 35 to open and close, and a cylinder coupling portion 33c for driving the claw 33 to rotate.
The hub 32 has a first mating surface 32a that mates with the die mounting bar 41 to apply a downward impact to the die mounting bar 41. The punching power motor 21 converts the rotation power into the up-and-down motion of the punching tool connecting seat 3, and the punching tool connecting seat 3 applies a downward punching force to the punching tool mounting rod 41 through the first matching surface 32a of the interface seat 32 in the downward motion process, so that the punching tool 45 punches a hole on a material.
The engagement portion 33b is engaged with the die-cutter mounting bar 41 to apply an upward restoring force to the second engagement surface 33d of the die-cutter mounting bar 41. During the upward movement of the die-cutter coupling holder 3, the second mating surface 33d of the engagement portion 33b applies an upward pulling force to the die-cutter mounting bar 41, so that the die-cutter 45 returns to the high position.
When the punching speed reaches more than 1000 revolutions per minute, as the punching cutter connecting seat 3 and the punching cutter mounting rod 41 adopt a movable connection mode, the assembly gap between the punching cutter connecting seat 3 and the punching cutter mounting rod 41 is difficult to avoid generating larger noise in high-speed up-down motion, and meanwhile, when the punching cutter connecting seat 3 drives the punching cutter mounting rod 41 to move upwards from downwards, the instant acting force between the punching cutter connecting seat 3 and the punching cutter mounting rod 41 is very large, the common connecting structure cannot bear the large acting force, and noise is increased after the connecting gap between the punching cutter connecting seat 3 and the punching cutter mounting rod is large. Aiming at the difficult problem, the invention adapts to the requirement of high-speed punching operation, adopts a clamping claw 33 clamping structure, and the force arm between the cylinder connecting part 33c and the rotating shaft 35 is larger than or equal to the force arm between the stress point of the second matching surface 33d and the rotating shaft 35, so that the load of the connecting cylinder 34 is reduced.
In this embodiment, the center of the cylinder connecting portion 33c and the stress point of the second mating surface 33d are in the same vertical plane, and at this time, the moment arm between the cylinder connecting portion 33c and the rotating shaft 35 is equal to the moment arm between the stress point of the second mating surface 33d and the rotating shaft 35. The end of the driving rod connected to the air cylinder 34 is formed with a groove 34a, and the air cylinder connecting portion 33c is located in the groove 34 a. The end of the driving rod connected with the air cylinder 34 and the air cylinder connecting part 33c can also adopt other movable connection modes such as a pin shaft and the like, and the claw 33 is driven to rotate in the expansion and contraction process of the driving rod connected with the air cylinder 34.
A first stepped surface is formed in the groove 34a, and when the cylinder connecting portion 33c is in the groove 34a, the cylinder connecting portion 33c can be self-locked by the engagement of the first stepped surface. Also, the second mating surface 33d has a second stepped surface, so that when the die-cutter coupling seat 3 is coupled to the die-cutter mounting bar 41, the coupling cylinder 34 drives the jaw 33 to lock the die-cutter mounting bar 41, and the center of the cylinder coupling portion 33c and the second mating surface 33d are respectively in a self-locking state. Even if the connecting cylinder 34 is disconnected, the condition that the die cutter connecting seat 3 is separated from the die cutter mounting rod 41 is not caused. The self-locking state can also bear the tensile force of the upward movement of the stamping knife mounting rod 41 driven by the stamping knife connecting seat 3, thereby avoiding the assembly gap and the larger noise generated in the operation process.
The die-cutter mounting bar 41 is provided on the die-cutter mounting seat 4 so as to be movable up and down by a second guide structure. The die cutter mounting seat 4 is provided with a spring mounting plate 4a, a plurality of mounting holes which are arranged in a straight line are formed in the spring mounting plate 4a, and a die cutter mounting rod 41 is arranged in each mounting hole. A return spring 42 is arranged between the spring mounting plate 4a and the upper end of the die cutter mounting rod 41, and the edge of the matching surface of the interface seat 32 and the die cutter mounting rod 41 is provided with an inclined surface. The reset spring 42 enables the punch mounting rod 41 to be at an upper limit position, and when the driving mounting seat 2 moves transversely, the lower end of the punch connecting seat 3 can move against the upper end of the punch mounting rod 41. The edge of the matching surface of the interface seat 32 and the punching cutter mounting rod 41 is provided with an inclined surface, so that the interface seat 32 and the punching cutter mounting rod 41 can be guided to be in butt joint, and the clamping of the punching cutter connecting seat 3 due to insufficient height precision in the moving process is avoided.
The punching cutter connecting seat 3 is arranged on the driving mounting seat 2 through a first guiding structure. The punching power motor 21 is fixedly arranged on the driving installation seat 2 and is connected with the punching cutter connecting seat 3 through a punching cutter transmission mechanism.
The die cutter connecting seat 3, the crankshaft 22 and the punching power motor 21 for driving the crankshaft 22 to rotate are arranged on the driving mounting seat 2, and the die cutter connecting seat 3 is in butt joint with any die cutter mounting rod 41 through the horizontal movement of the driving mounting seat 2.
Example 2
As shown in fig. 6 and 7, is another embodiment of a die-cutter attachment structure. In this embodiment, the die-cutter connecting structure also includes an interface seat 32 that can be connected to and disconnected from the die-cutter mounting bar 41, and the interface seat 32 is provided with two claws 33 that can engage two sides of the die-cutter mounting bar 41. The punching cutter connecting seat 3 is provided with a connecting cylinder 34 which drives the claw 33 to rotate so as to realize the clamping or loosening action.
The claw 33 has a rotating portion 33a rotatably connected to the die-cutter coupling seat 3 via a rotating shaft 35, an engaging portion 33b rotated about the rotating shaft 35 to open and close, and a cylinder coupling portion 33c for driving the claw 33 to rotate.
The end of the driving rod connected to the air cylinder 34 is formed with a groove 34a, and the air cylinder connecting portion 33c is located in the groove 34 a. The end of the driving rod connected with the air cylinder 34 and the air cylinder connecting part 33c can also adopt other movable connection modes such as a pin shaft and the like, and the claw 33 is driven to rotate in the expansion and contraction process of the driving rod connected with the air cylinder 34.
The hub 32 has a first mating surface 32a that mates with the die mounting bar 41 to apply a downward impact to the die mounting bar 41. The punching power motor 21 converts the rotation power into the up-and-down motion of the punching tool connecting seat 3, and the punching tool connecting seat 3 applies a downward punching force to the punching tool mounting rod 41 through the first matching surface 32a of the interface seat 32 in the downward motion process, so that the punching tool 45 punches a hole on a material.
The engagement portion 33b is engaged with the die-cutter mounting bar 41 to apply an upward restoring force to the second engagement surface 33d of the die-cutter mounting bar 41. During the upward movement of the die-cutter coupling holder 3, the second mating surface 33d of the engagement portion 33b applies an upward pulling force to the die-cutter mounting bar 41, so that the die-cutter 45 returns to the high position.
When the vertical plane of the center of the rotating portion 33a deviates from the stress point of the second mating surface 33d, the larger the distance between the vertical plane and the stress point of the second mating surface 33d is, the longer the moment arm of the stress point of the second mating surface 33d is. Therefore, the greater the moment applied to the jaw 33 by the die-cutter mounting bar 41 during the operation, the gap and noise will be generated in the interface seat 32 during the upward movement of pulling the die-cutter mounting bar 41 when the moment applied to the die-cutter mounting bar 41 exceeds the moment applied to the center of the rotating portion 33a by the cylinder connecting portion 33c. Therefore, the smaller the distance between the vertical plane in which the center of the rotating portion 33a is located and the stress point of the second mating surface 33d, the better.
In order to improve the connection reliability between the die-cutter connecting seat 3 and the die-cutter mounting bar 41 and avoid the occurrence of gaps and noises in the connection relationship due to high load during operation, in this embodiment, the center of the rotating portion 33a and the stress point of the second mating surface 33d are disposed on the same vertical plane. At the center of the rotating portion 33a, that is, at the rotating shaft 35, after the engaging portion 33b is engaged with the die-cutter mounting rod 41, an upward pulling force is directly applied to the die-cutter mounting rod 41 from the center of the rotating portion 33a, and the connecting cylinder 34 is only responsible for controlling the rotation of the claw 33 when the die-cutter mounting rod 41 is connected.
The preferred embodiments of this invention have been described so far that various changes or modifications may be made by one of ordinary skill in the art without departing from the scope of this invention.
Claims (7)
1. A punching cutter switching mechanism of a punching machine is characterized in that: the punching device comprises a driving installation seat (2) capable of moving along a cross arm (12) in a straight line, wherein a punching cutter connecting seat (3) which is driven by a punching power motor (21) and can move up and down is arranged on the driving installation seat (2); a punching cutter mounting seat (4) fixedly connected with the cross arm (12) is arranged below the driving mounting seat (2), and at least two punching cutter mounting rods (41) which are arranged side by side are arranged on the punching cutter mounting seat (4); a switching motor (14) for driving the driving installation seat (2) to linearly move so as to connect an interface seat (32) of the punching cutter connecting seat (3) with any one punching cutter installation rod (41) is fixed on the cross arm (12); the interface seat (32) is provided with two clamping claws (33) which can clamp the two sides of the stamping knife mounting rod (41); the punching cutter connecting seat (3) is provided with a connecting cylinder (34) for driving the clamping jaw (33) to rotate so as to realize clamping or loosening actions; the clamping jaw (33) is provided with a rotating part (33 a) which is rotationally connected with the punching cutter connecting seat (3) through a rotating shaft (35), an engaging part (33 b) which rotates around the rotating shaft (35) to open and close, and a cylinder connecting part (33 c) for driving the clamping jaw (33) to rotate; the interface seat (32) is provided with a first matching surface (32 a) matched with the punch cutter mounting rod (41) to apply downward impact force to the punch cutter mounting rod (41); the clamping part (33 b) is provided with a second matching surface (33 d) matched with the punch cutter mounting rod (41) to apply upward restoring force to the punch cutter mounting rod (41); the force arm between the cylinder connecting part (33 c) and the rotating shaft (35) is larger than or equal to the force arm between the stress point of the second matching surface (33 d) and the rotating shaft (35); a groove (34 a) is formed at the end part of the driving rod connected with the air cylinder (34), and an air cylinder connecting part (33 c) is positioned in the groove (34 a); a first stepped surface is formed inside the groove (34 a), and when the cylinder connecting portion (33 c) is in the groove (34 a), the cylinder connecting portion (33 c) can be self-locked by the engagement action of the first stepped surface.
2. The die cutter switching mechanism of a punching machine according to claim 1, characterized in that: the cross arm (12) is provided with a linear transmission mechanism which converts the rotation motion of a power shaft of the switching motor (14) into the linear motion of the driving installation seat (2).
3. The die cutter switching mechanism of a punching machine according to claim 2, characterized in that: the linear transmission mechanism comprises two first synchronous wheels fixed on the cross arm (12) and a first synchronous belt arranged between the two first synchronous wheels; the driving side first synchronous wheel rotating shaft is connected with the power output shaft of the switching motor (14), and the belt body of the first synchronous belt is connected with the driving installation seat (2).
4. A punch knife switching mechanism of a punching machine according to claim 3, characterized in that: a punching power motor (21) and a first guide structure for guiding the punch cutter connecting seat (3) to move up and down are fixed on the driving mounting seat (2); the power output shaft of the punching power motor (21) is connected with the punching cutter connecting seat (3) through a punching cutter transmission mechanism.
5. The die cutter switching mechanism of a punching machine according to claim 4, wherein: the punching cutter transmission mechanism comprises a crankshaft (22) connected with a punching power motor (21), and the upper end of the punching cutter connecting seat (3) is connected with a crank part on the crankshaft (22) through a connecting rod (31).
6. The die cutter switching mechanism of a punching machine according to claim 5, characterized in that: the punching cutter mounting rod (41) is arranged on the punching cutter mounting seat (4) in an up-and-down motion mode through a second guide structure; the die cutter mounting seat (4) is provided with a spring mounting plate (4 a), and a return spring (42) is arranged between the spring mounting plate (4 a) and the upper end part of the die cutter mounting rod (41).
7. The die cutter switching mechanism of a punching machine according to claim 6, characterized in that: the second guide structure comprises a guide rail fixed on the punching cutter mounting seat (4) and a sliding block connected with the punching cutter mounting rod (41); the lower part of the punching cutter mounting rod (41) is sleeved with a pressing sleeve (43) capable of moving up and down, and a buffer spring (44) is arranged between the pressing sleeve (43) and the sliding block.
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| CN201810529714.XA CN108772891B (en) | 2018-05-29 | 2018-05-29 | Punching cutter switching mechanism of punching machine |
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|---|---|---|---|
| CN201810529714.XA CN108772891B (en) | 2018-05-29 | 2018-05-29 | Punching cutter switching mechanism of punching machine |
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| CN108772891A CN108772891A (en) | 2018-11-09 |
| CN108772891B true CN108772891B (en) | 2023-12-08 |
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|---|---|
| CN108772891A (en) | 2018-11-09 |
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