Pitch stamping fine stamping die of step chain

Abstract

The invention relates to the technical field of step chain pitch stamping, in particular to a step chain pitch stamping fine stamping die which comprises a lower die and an upper die which are used in cooperation with a machine tool, a roller conveyor and a plate. The die cavity is formed in the lower die, the air blowing hole is formed in the die cavity, the flattening assembly is installed on the lower die, the positioning assembly is installed on the flattening assembly, the air blowing assembly is installed on the flattening assembly, the transmission assembly is installed on the upper die, and the lifting assembly is installed between the upper die and the flattening assembly. According to the invention, by utilizing the power of upward movement and downward movement of the upper die, the upper die can flatten a plate in advance before the upper die descends to punch the plate, so that the shaking caused by the restriction of a waste material area on the plate is finished, the position of the plate is fixed, the plate is prevented from deviating, and the plate can be driven to be lifted simultaneously when the upper die ascends, so that the production efficiency is improved. And the plates are prevented from being scratched with the lower die when being conveyed by the roller conveyor.

Description

Technical Field

[0001] The invention relates to the technical field of pitch stamping of a step chain, in particular to a pitch stamping fine-blanking die for a step chain. Background Art

[0002] The step chain is a key component in escalators and moving walkways. The pitch is the distance between the chain plates in the step chain. The accuracy of the pitch directly affects the running stability and reliability of the step chain. During the production process, the pitch stamping of the step chain needs to be done through the fine stamping process of the fine stamping die to ensure the pitch accuracy of the chain plates.

[0003] In the existing fine stamping die, in the process of stamping the chain plates of the step chain, in order to improve efficiency, the long steel plate will be conveyed to the lower die through a roller conveyor, and the upper die will move downward to stamp the steel plate on the lower die into the chain plate of the step chain. In this process, the lower die will follow the upper die to move downward. When the stamping is completed and the upper die moves up, the lower die will also have an upward rebound trend. In order to improve efficiency and reduce the number of times the steel plate is fed, the unformed steel plate material is generally longer. As the stamping work proceeds, the stamped steel plate waste (the waste is connected to the unstamped plate) will gradually move to one side of the die and become longer. This will result in the stamping process. When a chain plate is stamped, the upper die moves upward and the lower die rebounds upward, which will cause the lower die to rebound. The plate on the die shakes, and as the length of the waste plate increases, the gravity restraint of the waste area will become greater. When the lower die rebounds upward, the shaking transmitted from the waste area to the unpunched plate area will become more severe. The shaking process is likely to cause deviations in the stamping position, and the stamped plate area is subjected to secondary stamping, which will cause the stamped chain plate here to be incomplete and defective, resulting in waste of the plate. In addition, the shaking of the plate during the stamping process will cause the edge of the plate to warp up, causing edge burrs during the stamping process. In the process of conveying steel on the roller conveyor, the plate and the surface of the lower die are in contact, and the burrs will scratch the surface of the lower die, thereby making the surface of the stamping platform uneven, which reacts on the plate, resulting in scratches on the stamped chain plate, affecting the aesthetics.

[0004] The existing technology solves the problem of sheet jitter by setting a cross bar between the lower die and the roller conveyor. The cross bar is fixed and located above the sheet to press the sheet to prevent the sheet from jumping. However, the waste area of ​​the sheet cannot be suppressed. When the lower die rebounds, the sheet in the waste area will still shake, and the effect is minimal. It cannot prevent the shaking of the waste area from causing the sheet in the stamping area to shake. Moreover, since the cross bar is fixed, the sheet will always rub against the lower die, thereby aggravating the scratches between the sheet and the lower die.

[0005] Therefore, a pitch stamping fine blanking die for a step chain is proposed. Summary of the invention

[0006] The object of the present invention is to provide a pitch stamping fine-punching die for a step chain, which solves the problem that when the pitch chain plate of the step chain is punched out of the plate by the die, as the length of the waste plate becomes longer, the gravity restraint of the waste area will become greater, and when the lower die rebounds upward, the vibration transmitted from the waste area to the un-punched plate area will become more violent, which can easily lead to deviation in the stamping position and scratches on the plate, resulting in scratches on the stamped chain plate that affect the aesthetics. The present invention utilizes the power of the upper die to move up and down, so that the upper die can flatten the plate in advance before it descends to punch the plate, thereby ending the vibration caused by the restraint of the waste area on the plate, and at the same time fixing the position of the plate to prevent the plate from shifting, and can also drive the plate to be lifted at the same time when the upper die rises, to prevent the plate from scratching the lower die when being transported by the roller conveyor.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A pitch stamping fine-blanking die for a ladder chain, comprising a lower die and an upper die used in conjunction with a machine tool, a roller conveyor, and a plate, and also comprising a die groove provided on the lower die, a blowing hole provided on the die groove, a flattening assembly installed on the lower die, a positioning assembly installed on the flattening assembly, a blowing assembly installed on the flattening assembly, a transmission assembly installed on the upper die, and a lifting assembly installed between the upper die and the flattening assembly; the flattening assembly is provided with two groups symmetrically arranged on both sides of the lower die; the upper die is driven to reciprocate up and down by a motor and a crank; the flattening assembly is provided with two groups symmetrically arranged on both sides of the lower die; the transmission assembly moves with the movement of the upper die; when the upper die descends, the transmission assembly pushes the flattening assembly to flatten the plate; in the process of flattening the plate, the flattening assembly causes the punching holes on the plate to be sleeved on the positioning assembly; when the flattening assembly is pressed down, the blowing assembly blows air to cool down the die groove; during the ascent of the upper die, the transmission lifting assembly drives the plate to follow the ascent.

[0009] Preferably, the flattening assembly includes a mounting frame fixedly connected to the lower mold, a slide groove provided on the mounting frame, a bottom roller rotatably connected to the mounting frame, a sliding block slidably connected in the slide groove, an elastic member 1 installed between the sliding block and the bottom of the slide groove, and a pressure roller fixedly connected to the sliding block; when the transmission assembly descends along with the upper mold, the transmission assembly will simultaneously press the roller shafts on both sides of the two groups of pressure rollers so that the two groups of pressure rollers overcome the elastic force of the elastic member 1 and press downward at the same time, thereby flattening the shaking plate.

[0010] Preferably, the positioning assembly includes a bracket fixedly connected to the mounting frame, a block fixedly connected to the bracket, and an arc surface arranged on the block; the shape of the block matches the shape of the notch of the plate after being punched, and when the plate is lowered by the lifting assembly, the punched holes formed on the plate after punching will be mounted on the block to prevent the plate from shifting when the plate continues to be punched.

[0011] Preferably, the lower die, bottom roller and top surface of the bracket are all on a horizontal line; and the clamping block and the die groove are on a straight line; the setting of the bracket can transfer the bending point of the sheet caused by the waste area to the direction of the waste area, preventing the bending point of the sheet from being too close to the stamping area and affecting the stamping effect.

[0012] Preferably, the blowing assembly includes an air bag fixedly connected to the bottom of the sliding block, and an air pipe fixedly connected to the air bag; the air pipe passes through the lower mold and is connected to the blowing holes on the mold groove; the air pipe and the blowing holes are provided with four groups, which are located on both sides of the mold groove in pairs. When the pressure roller is pressed down and approaches the bottom roller, the air bag will be squeezed through the sliding block to discharge the gas in the air bag, and finally guided into the mold groove along the air pipe, so as to cool down and dissipate the high temperature caused by the continuous operation of the mold groove.

[0013] Preferably, the airbag is located inside the elastic member 1, and the airbag is a foldable and telescopic airbag, the bottom of the airbag is fixedly connected to the mounting frame, and when the elastic member 1 pushes the pressure roller to rise and rebound, the sliding block will simultaneously drive the airbag to absorb air and restore to a saturated state.

[0014] Preferably, the transmission assembly includes a top plate fixedly connected to the upper mold, fixed slot blocks fixedly connected to both sides of the top plate, sliding rods slidably connected to the fixed slot blocks, a push rod fixedly connected to the bottom between the two sets of sliding rods, and an elastic member 2 installed between the push rod and the top plate; the elastic force of the elastic member 2 is greater than that of the elastic member 1; when the push rod follows the upper mold to move downward, it will press the pressure roller to move down to cause the elastic member 1 to contract, while the elastic member 2 will only have a slight contraction trend at this time, until the pressure roller contacts the plate so that the pressure roller can no longer press down, at which time the push rod will continue to move downward with the upper mold to cause the elastic member 2 to contract until the upper mold completes the stamping operation and rises.

[0015] Preferably, the center line of the top plate and the center line of the upper mold are in a straight line; and the second elastic member is located in the middle of the top plate and the push rod. When the push rod pushes the pressure roller down, the thrust on both sides of the push rod can be ensured to be consistent, and no tilting of one side will occur.

[0016] Preferably, the lifting assembly includes a supporting slide rail fixedly connected to the mounting frame, a connecting rod slidably connected to the supporting slide rail, a vertical slot provided on the connecting rod, a lifting rod fixedly connected to the bottom of the connecting rod, and a fixing rod fixedly connected to the upper mold; the supporting slide rail, the connecting rod and the fixing rod are each provided with two groups, and the lifting rod is fixedly connected between the bottoms of the two groups of connecting rods; the fixing rod is slidably connected to the vertical slot; when the upper mold completes a stamping work and is in the process of rising, when the upper mold rises to a position close to the top, the fixing rod will abut against the top of the vertical slot, thereby driving the connecting rod to follow the rise, driving the connecting rod to drive the lifting rod to lift the plate.

[0017] Preferably, the lifting rod is located at the bottom of the waste plate, and the maximum lifting distance of the plate by the lifting rod is the distance between the bottom roller and the pressure roller when the pressure roller is not squeezed; when the lifting rod lifts the plate and the roller conveyor conveys the plate, the unpunched plate will not contact the lower mold, which can avoid scratches on the plate caused by friction between the plate and the lower mold.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. Through the power of the upper die moving, in the process of the upper die stamping the sheet metal down, the push rod will first contact the roller shafts on both sides of the pressure roller to push the pressure roller down, and the downward pressure roller will press the sheet metal flat on the lower die to prevent the sheet metal from shaking, and in the process of the sheet metal being pressed by the pressure roller, the punching holes formed on the sheet metal after punching will be mounted on the card block to prevent the sheet metal from displacement, which can effectively prevent the sheet metal from shaking when the lower die rebounds, causing the sheet metal to move during the next punching, affecting the accuracy of the punching and causing unnecessary waste of the sheet metal.

[0020] 2. When the pressure roller is pressing down to make the plate stable, the sliding block under the pressure roller will squeeze the airbag to discharge the gas in the airbag, and finally guide it into the die groove along the air pipe, so as to continuously cool down and dissipate the high temperature caused by the continuous operation of the die groove. When the airbag is squeezed, it means that the upper die has approached the lower die and is about to touch the lower die. At this time, the gas discharged from the airbag can form air flow between the die grooves of the upper die and the lower die, and can cool down the center part of the upper die and the die groove at the same time, so as to prevent the temperature of the stamping parts on the die from being too high, resulting in a decrease in strength and affecting the stamping quality.

[0021] 3. After completing a stamping work, the upper die needs to rise to adjust the position of the plate. When the upper die rises to a position close to the top, the fixed rod will contact the top of the vertical slot, thereby driving the connecting rod to rise, driving the connecting rod to drive the lifting rod to lift the plate. After the plate rises, the roller conveyor will quickly drive the plate to switch positions for the next stamping. At this time, the plate in the stamped area will not contact the lower die, which can avoid the burrs on the plate from scratching the surface of the lower die, resulting in an uneven surface of the lower die, which in turn reacts on the plate, causing scratches on the plate to affect the aesthetics. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall appearance of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the enlarged three-dimensional structure of the lower mold and the upper mold of the present invention;

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the flattening assembly of the present invention;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the positioning component of the present invention;

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the blowing assembly of the present invention;

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the transmission assembly of the present invention;

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the support assembly of the present invention;

[0029] Figure 8 It is a side view of the support assembly of the present invention.

[0030] In the figure: 1. machine tool; 11. roller conveyor; 2. plate; 3. lower die; 4. upper die; 31. die groove; 32. blowing hole; 5. flattening assembly; 51. mounting frame; 52. slide groove; 53. bottom roller; 54. sliding block; 55. elastic part 1; 56. pressure roller; 6. positioning assembly; 61. bracket; 62. block; 63. arc surface; 7. blowing assembly; 71. air bag; 72. air pipe; 8. transmission assembly; 81. top plate; 82. fixed groove block; 83. sliding rod; 84. push rod; 85. elastic part 2; 9. lifting assembly; 91. supporting slide rail; 92. connecting rod; 93. vertical groove; 94. lifting rod; 95. fixing rod. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figures 1 to 8 The present invention provides a pitch stamping fine blanking die for a step chain, and the technical solution is as follows:

[0033] As an embodiment of the present invention, refer to Figure 1 and Figure 2 A pitch stamping fine-blanking die for a step chain, comprising a lower die 3 and an upper die 4 used in conjunction with a machine tool 1, a roller conveyor 11, and a plate 2, and also comprising a die groove 31 provided on the lower die 3, a blowing hole 32 provided on the die groove 31, a flattening assembly 5 installed on the lower die 3, a positioning assembly 6 installed on the flattening assembly 5, an air blowing assembly 7 installed on the flattening assembly 5, a transmission assembly 8 installed on the upper die 4, and a lifting assembly 9 installed between the upper die 4 and the flattening assembly 5; the flattening assembly 5 is provided with two groups symmetrically arranged on both sides of the lower die 3; the upper die 4 is driven to reciprocate up and down by a motor and a crank; the flattening assembly 5 is provided with two groups symmetrically arranged on both sides of the lower die 3; when working, the upper die 4 will continuously reciprocate to stamp the plate 2 into a chain plate, and the roller conveyor 11 will cooperate with the upper die 4 to work The unpunched sheet 2 is delivered to the die groove 31 of the lower die 3. During the movement of the upper die 4, the transmission component 8 will move with the upper die 4. When the upper die 4 descends, the transmission component 8 will first push the flattening component 5 to flatten the sheet 2. After flattening, the upper die 4 will contact the sheet 2 for punching to prevent the upper die 4 from directly punching the shaking sheet 2. In the process of the flattening component 5 flattening the sheet 2, the punching hole sleeve on the sheet 2 will be set on the positioning component 6 to prevent the sheet 2 from displacement. At the same time, when the flattening component 5 is pressed down, the blowing component 7 will also blow air to the die groove 31 to cool down the temperature of the die groove 31 caused by continuous work. When the upper die 4 completes a stamping work and rises, the transmission lifting component 9 drives the sheet 2 to follow the rise to prevent the sheet 2 from contacting the lower die 3 and causing scratches when the roller conveyor 11 transports the sheet 2.

[0034] As an embodiment of the present invention, refer to Figure 2 and Figure 3The flattening assembly 5 includes a mounting frame 51 fixedly connected to the lower mold 3, a slide groove 52 opened on the mounting frame 51, a bottom roller 53 rotatably connected to the mounting frame 51, a sliding block 54 slidably connected in the slide groove 52, an elastic member 55 installed between the sliding block 54 and the bottom of the slide groove 52, and a pressure roller 56 fixedly connected to the sliding block 54; each set of flattening assemblies 5 is provided with two sets of mounting frames 51, and the two sets of mounting frames 51 are symmetrically arranged on both sides of the lower mold 3, the bottom roller 53 and the pressure roller 56 are installed between the two sets of mounting frames 51, and both sides of the roller shaft of the pressure roller 56 are extended out of the mounting frame 51. When the transmission assembly 8 follows the upper mold 4 to descend, the transmission assembly 8 will simultaneously press the roller shafts on both sides of the two sets of pressure rollers 56 so that the two sets of pressure rollers 56 overcome the elastic force of the elastic member 55 and press down at the same time to flatten the shaking plate 2.

[0035] As an embodiment of the present invention, refer to Figure 4 The positioning assembly 6 includes a bracket 61 fixedly connected to the mounting frame 51, a block 62 fixedly connected to the bracket 61, and an arc surface 63 arranged on the block 62; the shape of the block 62 matches the shape of the notch of the plate 2 after being punched; when the upper die 4 completes a punching and rises and then descends to perform the next punching process on the plate 2, the plate 2 will be lifted up by the lifting assembly 9 and then put down. During the lowering process, the punching hole formed on the plate 2 after punching will be sleeved on the block 62 to prevent the plate 2 from displacement when the plate 2 continues to be punched.

[0036] As an embodiment of the present invention, refer to Figure 4 , the top surfaces of the lower die 3, the bottom roller 53 and the bracket 61 are all on a horizontal line; and the clamping block 62 and the die groove 31 are on a straight line, thereby ensuring the flatness of the sheet 2 when it is flattened by the bottom roller 53, and the setting of the bracket 61 can shorten the distance of the waste area of ​​the sheet 2, and transfer the bending point of the sheet 2 caused by the waste area to the direction of the waste area, preventing the bending point of the sheet 2 from being too close to the stamping area and affecting the stamping effect.

[0037] As an embodiment of the present invention, refer to Figure 3 and Figure 5The blowing assembly 7 includes an air bag 71 fixedly connected to the bottom of the sliding block 54, and an air pipe 72 fixedly connected to the air bag 71; the air pipe 72 passes through the lower mold 3 and is connected to the blowing holes 32 on the mold groove 31; the air pipe 72 and the blowing holes 32 are each provided with four groups, which are respectively located on both sides of the mold groove 31 in pairs. When the pressure roller 56 is pressed down and approaches the bottom roller 53, the air bag 71 will be squeezed through the sliding block 54 to discharge the gas in the air bag 71, and finally guided into the mold groove 31 along the air pipe 72, so as to cool down and dissipate the high temperature caused by the continuous operation of the mold groove 31. When the air bag 71 is squeezed, it means that the upper mold 4 has approached the lower mold 3 and is about to contact the lower mold 3. At this time, the gas discharged from the air bag 71 can form an air flow between the mold groove 31 of the upper mold 4 and the lower mold 3, and can cool down the center part of the upper mold 4 and the mold groove 31 at the same time.

[0038] As an embodiment of the present invention, refer to Figure 3 and Figure 5 The airbag 71 is located inside the elastic member 55, and the airbag 71 is a foldable and retractable airbag 71. The bottom of the airbag 71 is fixedly connected to the mounting frame 51. The airbag 71 is arranged inside the airbag 71 to prevent the airbag 71 from tilting during the squeezing process, resulting in uneven blowing. When the elastic member 55 pushes the pressure roller 56 to rise and rebound, the sliding block 54 will simultaneously drive the airbag 71 to inhale and restore to a saturated state.

[0039] As an embodiment of the present invention, refer to Figure 5 and Figure 6 The transmission assembly 8 includes a top plate 81 fixedly connected to the upper mold 4, a fixed slot block 82 fixedly connected to both sides of the top plate 81, a sliding rod 83 slidably connected to the fixed slot block 82, a push rod 84 fixedly connected to the bottom between the two sets of sliding rods 83, and an elastic member 85 installed between the push rod 84 and the top plate 81. The elastic force of the elastic member 85 is much greater than that of the elastic member 55. When the upper mold 4 descends, the push rod 84 will follow the movement and descend. The push rod 84 will first contact the roller shafts on both sides of the pressure roller 56 to push the pressure roller 56 downward. Since the elastic force of the elastic member 85 is much greater than that of the elastic member 55, the push rod 84 will move downward. At this time, the push rod 84 will press the pressure roller 56 to descend to cause the elastic part 1 55 to contract, while the elastic part 2 85 will only have a slight contraction trend at this time, until the pressure roller 56 contacts the plate 2 and the pressure roller 56 can no longer continue to press down (at this time, the elastic part 1 55 is not in a completely compressed state and will not cause the elastic part 1 55 to be crushed). At this time, the push rod 84 will shrink the elastic part 2 85 as the upper mold 4 continues to move downward, until the upper mold 4 rises after completing the stamping operation, the upper mold 4 will rise with the push rod 84, and the elastic part 2 85 and the elastic part 1 55 will resume to a relaxed state.

[0040] As an embodiment of the present invention, refer to Figure 6, the center line of the top plate 81 and the center line of the upper mold 4 are in a straight line; and the elastic member 85 is located in the middle position between the top plate 81 and the push rod 84. In the process of the push rod 84 pushing the pressure roller 56 to descend, the thrust on both sides of the push rod 84 can be ensured to be consistent, and will not cause one side to tilt. In addition, the sliding arrangement of the two sets of fixed groove blocks 82 and the two sets of sliding rods 83 can further ensure the verticality of the push rod 84 during the descent process.

[0041] As an embodiment of the present invention, refer to Figure 7 and Figure 8 The lifting assembly 9 includes a support rail 91 fixedly connected to the mounting frame 51, a connecting rod 92 slidably connected to the support rail 91, a vertical slot 93 provided on the connecting rod 92, a lifting rod 94 fixedly connected to the bottom of the connecting rod 92, and a fixing rod 95 fixedly connected to the upper mold 4; the support rail 91, the connecting rod 92 and the fixing rod 95 are each provided with two groups, and the lifting rod 94 is fixedly connected between the bottoms of the two groups of connecting rods 92; the fixing rod 95 is slidably connected to the vertical slot 93; when the upper mold 4 completes a stamping work and rises, the upper mold 4 rises to a position close to the top. , the fixed rod 95 will abut against the top of the vertical slot 93, thereby driving the connecting rod 92 to follow and rise, driving the connecting rod 92 to drive the lifting rod 94 to lift the plate 2. At this time, the roller conveyor 11 will drive the plate 2 to switch its position for the next punching. After the position switching of the plate 2 is completed, the upper mold 4 will descend for the next punching. At this time, the plate 2 will follow and descend until the plate 2 contacts the lower mold 3, and the punching hole on the plate 2 is connected with the block 62. At this time, the lifting rod 94 has descended to the bottom, and the fixed rod 95 will continue to slide downward along the vertical slot 93 as the upper mold 4 descends.

[0042] As an embodiment of the present invention, refer to Figure 7 and Figure 8 The lifting rod 94 is located at the bottom of the waste plate 2, and the maximum lifting distance of the lifting rod 94 on the plate 2 is the distance between the bottom roller 53 and the pressing roller 56 when the pressing roller 56 is not squeezed. When the lifting rod 94 lifts the plate 2 and the roller conveyor 11 conveys the plate 2, the unpunched plate 2 will not contact the lower mold 3, which can avoid the plate 2 and the lower mold 3 from scratching and causing scratches on the plate 2.

[0043] Working principle: When the existing fine stamping die is working, the sheet 2 will be transferred to the lower die 3 through the roller conveyor 11, and the sheet 2 will be stamped into a chain plate through the reciprocating motion of the upper die 4. During the stamping process, the roller conveyor 11 will adjust the position of the sheet 2 when the upper die 4 rises, and continuously adjust the unstamped sheet 2 to the die groove 31. In this process, as the length of the stamped waste sheet 2 gradually increases, and the rebound force of the lower die 3 will cause the sheet 2 in the stamping area to shake, and when the roller conveyor 11 switches the position of the sheet 2, the edge of the shaking sheet 2 will be warped, and then cause edge burrs during stamping. When the sheet 2 moves, the burrs will rub against the surface of the lower die 3, making the surface of the lower die 3 uneven, and then react on the sheet 2, resulting in scratches on the stamped chain plate.

[0044] When the present invention is used, refer to Figure 2 and Figure 7 When the upper die 4 completes a stamping work, it needs to rise, allowing the roller conveyor 11 to adjust the position of the sheet 2. During the rising process, when the upper die 4 rises to a position close to the top, the fixed rod 95 will abut against the top of the vertical slot 93, thereby driving the connecting rod 92 to follow the rise, driving the connecting rod 92 to drive the lifting rod 94 to lift the sheet 2. After the sheet 2 rises, the roller conveyor 11 will quickly drive the sheet 2 to switch its position for the next stamping. At this time, the sheet 2 will not contact the lower die 3, which can avoid the sheet 2 and the lower die 3 from scratching and causing scratches on the sheet 2. After the position switching of the sheet 2 is completed, the upper die 4 will descend for the next stamping, and the sheet 2 will follow the decline.

[0045] Reference Figure 2 and Figure 6 When the sheet 2 follows the upper die 4 to descend, the push rod 84 will first contact the roller shafts on both sides of the pressure roller 56 to push the pressure roller 56 downward. Since the elastic force of the elastic member 2 85 is much greater than that of the elastic member 1 55, the push rod 84 will press the pressure roller 56 downward to shrink the elastic member 1 55, and the elastic member 2 85 will only have a slight shrinkage trend at this time, until the pressure roller 56 contacts the sheet 2 so that the pressure roller 56 cannot continue to press down (at this time, the elastic member 1 55 is not in a completely compressed state and will not cause the elastic member 1 55 to be crushed). At this time, the sheet 2 will be fixed by the pressure roller 56 to prevent shaking, and the push rod 84 will shrink the elastic member 2 85 as the upper die 4 continues to move downward, until the upper die 4 rises after completing the stamping operation, and the elastic member 2 85 and the elastic member 1 55 will resume the relaxed state. In the process of the sheet 2 descending and being pressed, the punching hole formed on the sheet 2 after punching will be set on the outside of the card block 62 along the arc surface 63 on the card block 62 to prevent the sheet 2 from displacement.

[0046] Reference Figure 2 and Figure 5When the pressure roller 56 is pressed down and approaches the bottom roller 53, the airbag 71 will be squeezed by the sliding block 54 to discharge the gas in the airbag 71, and finally guided into the die groove 31 along the air pipe 72, cooling and dissipating the high temperature caused by the continuous operation of the die groove 31. When the airbag 71 is squeezed, it means that the upper mold 4 has approached the lower mold 3 and is about to contact the lower mold 3. At this time, the gas discharged by the airbag 71 can form air flow between the upper mold 4, the lower mold 3 and the die groove 31, and can cool the central part of the upper mold 4 and the die groove 31 at the same time. After the stamping is completed, the upper mold 4 will continue to rise and the remaining structures will repeat the above actions to achieve continuous stamping of the plate 2.

[0047] Even though we have provided specific embodiments of the present invention, it should be clear to those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without violating the fundamental concept of the present invention. The scope of the present invention is not fixed, but is ultimately determined by the claims contained in the patent document and the equivalent technical solutions thereto. In short, the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pitch stamping fine-blanking die for a step chain, comprising a lower die (3) and an upper die (4) used in conjunction with a machine tool (1), a roller conveyor (11), and a plate (2), characterized in that: The present invention also comprises a die groove (31) provided on the lower die (3), an air blowing hole (32) provided on the die groove (31), a flattening assembly (5) installed on the lower die (3), a positioning assembly (6) installed on the flattening assembly (5), an air blowing assembly (7) installed on the flattening assembly (5), a transmission assembly (8) installed on the upper die (4), and a lifting assembly (9) installed between the upper die (4) and the flattening assembly (5); the upper die (4) moves toward the lower die (3) to perform the stamping operation during the stamping process; the flattening assembly (5) is provided with There are two groups of components symmetrically arranged on both sides of the lower die (3); the transmission component (8) moves along with the movement of the upper die (4); when the upper die (4) descends, the transmission component (8) pushes the flattening component (5) to flatten the plate (2); during the process of flattening the plate (2), the flattening component (5) causes the punching holes on the plate (2) to be sleeved on the positioning component (6); when the flattening component (5) is pressed downward, the blowing component (7) blows air to cool the die groove (31); and during the process of the upper die (4) ascending, the transmission lifting component (9) drives the plate (2) to ascend.

2. The pitch stamping fine blanking die for a step chain according to claim 1, characterized in that: The flattening assembly (5) comprises a mounting frame (51) fixedly connected to the lower mold (3), a slide groove (52) provided on the mounting frame (51), a bottom roller (53) rotatably connected to the mounting frame (51), a sliding block (54) slidably connected in the slide groove (52), an elastic member (55) installed between the sliding block (54) and the bottom of the slide groove (52), and a pressing roller (56) fixedly connected to the sliding block (54).

3. The pitch stamping fine blanking die for a step chain according to claim 2, characterized in that: The positioning assembly (6) comprises a bracket (61) fixedly connected to the mounting frame (51), a clamping block (62) fixedly connected to the bracket (61), and an arc surface (63) arranged on the clamping block (62); the shape of the clamping block (62) matches the shape of the notch of the plate (2) after being punched.

4. The pitch stamping fine blanking die for a step chain according to claim 3, characterized in that: The top surfaces of the lower die (3), the bottom roller (53) and the bracket (61) are all on a horizontal line; and the clamping block (62) and the die groove (31) are on a straight line.

5. The pitch stamping fine blanking die for a step chain according to claim 4, characterized in that: The blowing assembly (7) comprises an air bag (71) fixedly connected to the bottom of the sliding block (54), and an air pipe (72) fixedly connected to the air bag (71); the air pipe (72) passes through the lower mold (3) and is connected to the blowing hole (32) on the mold groove (31); the air pipe (72) and the blowing hole (32) are each provided with four groups, and are located in groups of two on both sides of the mold groove (31).

6. The pitch stamping fine blanking die for a step chain according to claim 5, characterized in that: The airbag (71) is located inside the elastic member 1 (55), and the airbag (71) is a foldable and telescopic airbag (71), and the bottom of the airbag (71) is fixedly connected to the mounting frame (51).

7. The pitch stamping fine blanking die for a step chain according to claim 1, characterized in that: The transmission assembly (8) comprises a top plate (81) fixedly connected to the upper mold (4), fixed slot blocks (82) fixedly connected to both sides of the top plate (81), a sliding rod (83) slidably connected to the fixed slot blocks (82), a push rod (84) fixedly connected to the bottom between the two sets of sliding rods (83), and a second elastic member (85) installed between the push rod (84) and the top plate (81).

8. The pitch stamping fine blanking die for a step chain according to claim 7, characterized in that: The center line of the top plate (81) and the center line of the upper mold (4) are in a straight line; and the second elastic member (85) is located in the middle position between the top plate (81) and the push rod (84).

9. The pitch stamping fine blanking die for a step chain according to claim 8, characterized in that: The lifting assembly (9) includes a supporting rail (91) fixedly connected to the mounting frame (51), a connecting rod (92) slidably connected to the supporting rail (91), a vertical slot (93) provided on the connecting rod (92), a lifting rod (94) fixedly connected to the bottom of the connecting rod (92), and a fixing rod (95) fixedly connected to the upper mold (4); the supporting rail (91), the connecting rod (92) and the fixing rod (95) are each provided with two groups, and the lifting rod (94) is fixedly connected between the bottoms of the two groups of connecting rods (92); the fixing rod (95) is slidably connected to the vertical slot (93).

10. The pitch stamping fine blanking die for a step chain according to claim 9, characterized in that: The lifting rod (94) is located at the bottom of the end of the waste plate (2), and the maximum lifting distance of the plate (2) by the lifting rod (94) is the distance between the bottom roller (53) and the pressing roller (56) when the pressing roller (56) is not squeezed.

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