CN114043323A - Punch assembly and punch wear degree detection method - Google Patents
Punch assembly and punch wear degree detection method Download PDFInfo
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- CN114043323A CN114043323A CN202111193450.3A CN202111193450A CN114043323A CN 114043323 A CN114043323 A CN 114043323A CN 202111193450 A CN202111193450 A CN 202111193450A CN 114043323 A CN114043323 A CN 114043323A
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- punch
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- gear
- sliding groove
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/60—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of tools not covered by the preceding subgroups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
- B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Punching Or Piercing (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The application discloses a punch assembly, which comprises a punch, a sliding block and a driving plate, wherein the punch is arranged at the bottom of the sliding block, and the driving plate is rotationally connected with the side wall of the sliding block through a supporting shaft fixed at the end part; the inside rotation of slider installs the drive shaft, and the rotation of back shaft is suitable for driving the drive shaft and rotates, and then drives the drift through the bent axle section on the drive shaft and slides from top to bottom along the spout of slider bottom, and the lapping plate is installed to the bottom of spout, and the lapping plate is suitable for and carries out the grinding cooperation with the extrusion face lateral part of drift when the drift slides along the spout. The beneficial effect of this application: in the process that the punch vertically slides in a reciprocating manner along the sliding groove, the side part of the extrusion surface of the punch can be ground through the grinding plate arranged at the bottom of the sliding groove, and then tiny burrs generated when the punch punches at each time are removed, so that the punching quality of the punch is improved.
Description
Technical Field
The application relates to the field of stamping of parts, in particular to a punch assembly.
Background
A punch is a metal part, which is called a punch, an upper die, or a male die, and is mounted on a press die in a press apparatus, and is capable of performing a continuous punching, pressing, and breaking operation in the press apparatus to separate or plastically deform a material to be processed, thereby obtaining a desired finished product or semi-finished product.
The conventional punch operates as shown in fig. 1, in which a blank 300 is placed on an upper end of a die 200, and then a punch 100 is driven by a driving device to extrude the blank 300, so that the blank 300 is punched out to a desired shape by a shearing force between an extrusion surface 110 of the punch 100 and the die 300. With the continuous punching operation of the punch 100, as shown in fig. 2, the pressing surface 110 of the punch 100 forms a crushing and wearing process upward and toward the side portion, so that burrs 101 are formed on the side portion of the pressing surface 110, and when the burrs 101 are accumulated to a certain extent, the punching quality of the workpiece is seriously affected, and meanwhile, with the crushing of the punch 100, the axial length of the punch 100 is shortened, and the punching quality of the workpiece is also affected.
Disclosure of Invention
One of them aim at of this application provides a drift subassembly, can carry out lasting grinding to the lateral wall of drift in the process that the drift lasts the punching press to avoid the production of deckle edge.
Another object of the present application is to provide a punch wear degree detection method, which can detect the crushing wear degree of the stamping in real time, so as to replace the seriously worn punch in time.
In order to achieve the purpose, the technical scheme adopted by the application is as follows: a punch assembly comprises a punch, a slider and a driving plate, wherein the punch is mounted at the bottom of the slider, and the driving plate is rotatably connected with the side wall of the slider through a supporting shaft fixed at the end part, so that the slider is driven to move up and down through the swinging of the driving plate, and further the punch is driven to punch a blank; a cavity is arranged in the sliding block, a driving shaft is rotatably arranged between two sides of the cavity, the driving shaft is matched with the supporting shaft through a gear set so as to drive the driving shaft to rotate through the rotation of the supporting shaft, a crankshaft section is arranged in the middle of the driving shaft, a sliding groove is arranged at the bottom of the cavity, a punch is slidably arranged in the sliding groove, the punch is hinged with the crankshaft section through a connecting plate and is suitable for sliding up and down along the sliding groove under the driving of the crankshaft section, when the punch slides to the outside of the sliding block, the punch and a blank are punched through an extrusion surface, and after the punch finishes punching, the punch is contracted into the sliding block along the sliding groove; the bottom end of the sliding groove is provided with a grinding plate, and the grinding plate is suitable for being matched with the side part of the extrusion surface of the punch when the punch slides along the sliding groove, so that fine burrs generated by each punching of the punch are ground, and the punching quality of the punch is improved; still install detection mechanism in the lateral wall of spout, detection mechanism is suitable for right the extrusion face degree of wear of drift detects to when the extrusion face wearing and tearing of drift are serious, can in time remind and change newly the drift, thereby further assurance the punching press quality of drift.
Preferably, a supporting block is fixed at the upper end of the cavity, a first cam is fixedly mounted on the driving shaft and positioned on the side portion of the crankshaft section, the short edge of the first cam is always in sliding fit with the arc-shaped end of the lower end of the supporting block, when the punch punches, the first cam is suitable for being pressed against the upper end face of the punch through the end portion of the long edge under the driving of the driving shaft, and then supporting force is provided for punching of the punch, so that the connecting plate and the driving shaft are prevented from being bent due to overlarge stress.
Preferably, the upper end of the connecting plate is rotatably connected with the crankshaft section, a connecting groove is formed in the lower end of the connecting plate, a connecting seat is installed on the upper end face of the punch, the connecting plate is connected with a pin shaft on the connecting seat through the connecting groove, the length of the connecting groove is larger than the diameter of the pin shaft, so that when the punch punches, the punch is jacked up to abut against the end portion of the long edge of the first cam, the connecting plate is basically in a stress-free state at the moment, and safety of the connecting plate and safety of the driving shaft are guaranteed.
Preferably, the gear set includes a first gear, a second gear and a third gear, the first gear is mounted at an end portion of the support shaft extending into the cavity, the second gear is rotatably connected with a side wall of the cavity through a rotating shaft, the third gear is fixedly mounted at an end portion of the drive shaft, the second gear is respectively engaged with the first gear and the third gear, and diameters of the first gear, the second gear and the third gear are sequentially reduced, so that a rotation angle of the support shaft is enlarged through the gear set, and the crankshaft section is ensured to drive the punch to have a sufficient sliding distance.
Preferably, a cleaning mechanism is further installed in the cavity, the cleaning mechanism comprises at least one air extractor and a vent pipe, the air extractor is fixedly installed below the driving shaft, a communicating pipe, an air inlet pipe and a plurality of air outlet pipes are arranged on the vent pipe, the vent pipe is located below the air extractor and is communicated with a port of the air extractor through the communicating pipe, the air inlet pipe is communicated with the outside of the sliding block, a plurality of uniformly distributed air outlet grooves are formed in the lower end wall of the cavity along the circumferential direction of the sliding groove, the upper ends of the air outlet grooves are correspondingly communicated with the air outlet pipes, and the lower ends of the air outlet grooves are communicated with the sliding groove; and a second cam is fixedly mounted on the driving shaft and matched with the air extracting device, so that when the punch slides into the cavity, the second cam drives the air extracting device to discharge air pumped from the outside into the chute, and the extrusion surface of the punch is cleaned, so that sundries are prevented from being adhered to the extrusion surface of the punch, and the punching quality of the punch is further influenced.
Preferably, when the punch retracts to the highest position of the sliding chute, the lower end of the air outlet groove is lower than the height of the extrusion surface of the punch, so that the cleaning mechanism can clean the extrusion surface of the punch normally.
Preferably, the detection mechanism comprises a plurality of light projection devices and a plurality of photosensitive pieces, a plurality of first mounting grooves which are uniformly distributed along the circumferential direction are arranged in one half of the side wall of the chute, a plurality of second mounting grooves which are uniformly distributed along the circumferential direction are arranged in the other half of the side wall of the chute, the first mounting grooves are communicated with the chute through projection grooves arranged at the end parts, the second mounting grooves are communicated with the chute, the first mounting grooves and the second mounting grooves are in one-to-one correspondence, the light projection devices are correspondingly mounted in the first mounting grooves, the photosensitive pieces are correspondingly mounted in the second mounting grooves, the light projection devices are suitable for emitting detection light to the second mounting grooves through the projection grooves, and the photosensitive pieces are suitable for receiving the detection light; when the punch retracts to the highest position of the sliding groove, the extrusion surface of the punch is located in the height range of the projection groove, so that the detection light part is shielded by the punch, and the abrasion degree of the punch is judged according to the shielded height.
A wear degree detection method of a punch comprises the detection mechanism, and the method for detecting the wear degree of the punch through the detection mechanism comprises the following steps:
s100: initially, the punch is contracted to the highest position of the sliding groove, and the photosensitive film receives the shielded detection light and records the height as t01、t02、……、t0nWherein t is0nIndicating the height of the detection light received by the photosensitive sheet at any position;
s200: in the process of punching by the punch, when the punch shrinks to the highest position of the sliding groove each time, the photosensitive film can receive the shielded detection light and record the height as tN01、tN02、……、tN0nWherein t isN0nIndicating the height of the detection light received by any position recorded by the photosensitive film when the punch punches for the Nth time;
s300: by mixing tN0nAnd t0nThe values are compared, so that the abrasion degree delta h of the extrusion surface at any position during the Nth punching of the punch can be obtained in real timeN0n＝tN0n-t0n(ii) a When Δ hN0nIs less than a set safety threshold value deltah0When Δ h occurs, it indicates that the punch can continue to be usedN0nIs greater than or equal to a set safety threshold value delta h0If the abrasion is abnormal, the next step is carried out;
s400: degree of wear Δ h for the N-1 st time of wear abnormality position(N-1)0nAnd Δ hN0nComparing, and if the difference between the two is less than or equal to a preset error threshold value delta x, judging that the abrasion of the punch exceeds a set safety threshold value delta h0Namely, the punch cannot be used continuously; if the difference value between the two is larger than a preset error threshold value delta x, stamping again to obtain the abrasion degree delta h of the (N + 1) th time(N+1)0nIf Δ h(N+1)0nThe value of (a) is still larger than or equal to the set safety threshold value delta h0It means that the wear of the punch surely exceeds the set safety threshold Δ h0That is, the punch cannot be used continuously, if Δ h(N+1)0nIs less than a set safety threshold value deltah0And if so, indicating that the Nth detection result is interfered by the outside, namely the punch can be continuously used.
Preferably, step S100 further includes the steps of:
s110: for t01、t02、……、t0nMaximum value of (1)0nmaxAnd a minimum value t0nminComparing the difference values, and if the difference value between the two is smaller than a set error threshold value delta y, indicating that the detection mechanism is in a normal working state, and performing the next step; if the difference value between the two is larger than the set error threshold value delta y, the mounting position of the detection mechanism is abnormal, the next step cannot be carried out, and the detection mechanism needs to be adjusted.
Preferably, the safety threshold Δ h0The value of the error threshold value delta x is 10% -20% of the height of the projection groove, the value of the error threshold value delta x is 0.5% -1% of the height of the projection groove, and the value of the error threshold value delta y is 0.5% -2% of the height of the projection groove.
Compared with the prior art, the beneficial effect of this application lies in:
(1) through the internally mounted drive shaft at the slider, and be connected through the gear assembly between drive shaft and the back shaft, thereby gliding in-process about the slider carries out, can drive the drive shaft in the slider and rotate, and then drive the bent axle section through driving the axle and be connected the drift with it and slide along the spout that the slider bottom set up, and at the gliding in-process of drift along the spout, the lapping plate that can install bottom the spout grinds the extruded surface lateral part of drift, thereby get rid of the small deckle edge that produces when punching press the drift at every turn, with the punching press quality of assurance drift.
(2) Through installation detection mechanism in the lateral wall of spout to light projection device who includes through detection mechanism throws detection light to the photosensitive film of spout symmetry lateral part, and then when the drift contracts, can judge the extrusion face degree of wear and tear of drift through the height of the detection light that the drift lower part sheltered from, thereby change the drift serious to wearing and tearing even, with the punching press quality of assurance drift.
Drawings
Fig. 1 is a schematic diagram of a punching principle of a punch in the prior art.
Fig. 2 is a partially enlarged schematic view of the side of the extrusion surface of the punch in the prior art.
Fig. 3 is a schematic view of the overall appearance structure of the present invention.
Fig. 4 is a schematic view of the internal structure of the present invention.
FIG. 5 is a schematic view of the internal structure of the slider according to the present invention.
FIG. 6 is an enlarged view of the portion A of FIG. 5 according to the present invention.
Fig. 7 is a partial cross-sectional view of the present invention.
FIG. 8 is a side cross-sectional view of the slider of the present invention.
Fig. 9 is a cross-sectional view taken along the line B-B of fig. 8 in accordance with the present invention.
Fig. 10 is a schematic view of the construction of the drive shaft of the present invention.
Fig. 11 is a side sectional view of the present invention in a press working state.
Fig. 12 is an enlarged view of the invention at the location of part C in fig. 11.
Fig. 13 is a front sectional view in the press working state of the present invention.
Fig. 14 is a side sectional view of the present invention in a wear detection state.
Fig. 15 is a front sectional view of the present invention in a wear detection state.
FIG. 16 is a partial cross-sectional view of the cleaning mechanism in the wear detection state of the present invention.
Fig. 17 is a partial cross-sectional view of the sensing mechanism in the wear sensing state of the present invention.
Fig. 18 is an enlarged view of fig. 17 taken at a point D.
In the figure: the punch 100, the extruding surface 110, the burr 101, the die 200, the blank 300, the slider 4, the cavity 400, the sliding groove 410, the supporting block 42, the arc-shaped end 420, the grinding plate 430, the first mounting groove 440, the projection groove 441, the second mounting groove 442, the vent pipe 45, the air inlet pipe 451, the communicating pipe 452, the air outlet pipe 453, the air outlet groove 460, the driving plate 500, the supporting shaft 501, the gear set 6, the first gear 61, the second gear 62, the rotating shaft 621, the third gear 63, the driving shaft 7, the crankshaft section 701, the first cam 702, the second cam 703, the air extractor 8, the light projector 91, the photosensitive sheet 92, the detection light 900, the connecting plate 11, the connecting groove 111, the connecting seat 12 and the pin shaft 120.
Detailed Description
The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.
In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.
It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
As shown in fig. 3 to 18, one preferred embodiment of the present application is a punch assembly, which includes a punch 100, a slider 4 and two driving plates 500, wherein the punch 100 is installed at the bottom of the slider 4, the two driving plates 500 are two, the upper ends of the two driving plates 500 are connected to a crankshaft of a punching device, and the lower ends of the two driving plates 500 are respectively rotatably connected to the left and right side walls of the slider 4 through a support shaft 501 fixedly connected thereto, so that when the punching device performs punching, the crankshaft forms a crank-slider mechanism with the slider 4 through the driving plates 500, that is, the slider 4 is driven to vertically reciprocate through the rotation of the crankshaft, and further, the punch 100 installed at the bottom of the slider 4 performs punching on a blank 300; it will be appreciated that the drive plate 500 performs a swing motion about the support shaft 501 during the reciprocating vertical movement of the slider 4.
The inside of the slider 4 is provided with a cavity 400, a driving shaft 7 and a gear set 6 are installed in the cavity 400, wherein two ends of the driving shaft 7 are respectively rotatably connected with the left and right side walls of the cavity 400, at least one, preferably two, gear sets 6 are respectively located on the left and right side walls of the cavity 400, so that two ends of the driving shaft 7 are correspondingly matched with the supporting shafts 501 on the two side walls of the cavity 400 through the gear sets 6, and further the driving shaft 7 is driven to rotate through the rotation of the supporting shafts 501, the middle part of the driving shaft 7 is provided with a crankshaft section 701, the bottom of the cavity 400 is provided with a sliding chute 410, the punch 100 is slidably installed in the sliding chute 410, and the upper end surface of the punch 100 is hinged with the crankshaft section 701 through a connecting plate 11, so that when the slider 4 is driven to the lowest position by the driving plate 500 to punch, the lower part of the punch 100 slides to the outside of the slider 4 along the sliding chute 410, so as to realize the punching with the blank 300 through the extrusion surface 110 of the lower end surface of the punch 100; when the punch 100 finishes punching, the slider 4 is driven by the driving plate 500 to ascend, and the lower portion of the punch 100 is driven by the crank section 701 to contract along the slide groove 410 into the slider 4. Grinding plate 430 is installed to the bottom of spout 410, and grinding plate 430's middle part is provided with the through-hole with spout 410 adaptation to at drift 100 along spout 410 the in-process that reciprocates, grinding plate 430 carries out the grinding cooperation through the lateral wall of through-hole and the lower part lateral wall of drift 100, and then gets rid of the small deckle edge 101 that produces after punching press 100 at every turn, thereby avoids deckle edge 101 to form the accumulation, has improved the punching press quality of drift 100 promptly.
The side wall of the sliding groove 410 is also internally provided with a detection mechanism, the detection mechanism is suitable for detecting the abrasion degree of the extrusion surface 110 of the punch 100, and further when the extrusion surface 110 of the punch 100 is seriously abraded, the punch 100 can be reminded and replaced by a new punch 100 in time, so that the punching quality of the punch 100 is further ensured.
It can be understood that, during one rotation period of the crankshaft, the driving plate 500 swings back and forth respectively, and during each swing of the driving plate 500, the punch 100 performs one reciprocating sliding process along the sliding groove 410, that is, during one rotation period of the crankshaft, the punch 100 performs two reciprocating sliding processes.
In this embodiment, the grinding plate 430 may have a plurality of layers, and the grain size of each layer gradually decreases from the lower layer to the upper layer along the grinding plate 430, thereby performing the process from rough grinding to finish grinding of the lower portion of the punch 100.
In one embodiment of the present application, as shown in fig. 4, 5, 8, 10, 11, 13-15, the upper end of the cavity 400 is fixed with a support block 42, meanwhile, the driving shaft 7 is provided with at least one first cam 702, preferably two first cams 702, the two first cams 702 are respectively arranged at two sides of the crank section 701, an included angle theta exists between the first cams 702 and the crank section 701 in the radial direction of the driving shaft 7, the first cams 702 comprise short sides and long sides, wherein the short side is arc-shaped and is always in sliding fit with the arc-shaped end 420 of the lower end of the supporting block 42, when the punch 100 performs punching, the first cam 702 is driven by the drive shaft 7 to abut against the upper end surface of the punch 100 via the end of the long side, so that a supporting force is provided for punching of the punch 100 by the pressing of the first cam 702 with the supporting block 42, so as to prevent the connecting plate 11 or the driving shaft 7 from being bent due to excessive stress when the punch 100 performs punching.
In this embodiment, as shown in fig. 12, the upper end of the connecting plate 11 is rotatably connected to the crankshaft section 701, the lower end of the connecting plate 11 is provided with a connecting groove 111, the connecting seat 12 is installed on the upper end surface of the punch 100, the connecting plate 11 is rotatably connected to the pin 120 on the connecting seat 12 through the connecting groove 111, and the length of the connecting groove 111 is greater than the diameter of the pin 120, so that when the long side of the first cam 702 rotates to the lowest position. A gap is formed between the end of the long side and the upper end surface of the punch 100, so that during the punching process of the punch 100, when the extrusion surface 110 of the punch 100 is in contact with the blank 300, the punch 100 is jacked up and moved up under the action of the supporting reaction force of the blank 300 until the punch is abutted against the end of the long side of the first cam 702, so that the support force is provided for the punching process of the punch 100 through the extrusion of the first cam 702 and the supporting block 42, and at the moment, the connection between the connecting plate 11 and the pin shaft 120 of the connecting seat 12 on the punch 100 is loose, namely, the connecting plate 11 is in an unstressed state, and the safety of the connecting plate 11 and the driving shaft 7 during the punching process of the punch 100 is ensured.
In one embodiment of the present application, as shown in fig. 4, 10, 11, 13 to 15, each set of gear sets 6 includes a first gear 61, a second gear 62 and a third gear 63, wherein the first gear 61 is mounted at an end of the support shaft 501 extending into the cavity 400, the third gear 63 is fixedly mounted at an end of one side of the drive shaft 7, the second gear 62 is rotatably connected with a side wall of the cavity 400 through a rotating shaft 621, and the second gear 62 is respectively engaged with the first gear 61 and the third gear 63. The diameters of the first gear 61, the second gear 62 and the third gear 63 are sequentially reduced so that the rotation angle of the support shaft 501 is enlarged by the gear set 6, thereby ensuring that the crank section 701 drives the punch 100 with a sufficient sliding distance.
It is understood that the diameter ratio of the second gear 62 to the first gear 61 is set to i21I.e. the transmission ratio of the second gear 62 to the first gear 61, the diameter ratio of the third gear 63 to the second gear 62 is set as i32That is, the transmission ratio of the third gear 63 and the second gear 62, and if the unidirectional rotation angle of the drive plate 500 is set to α, the single rotation angle of the drive shaft 7 is α · i21·i32Further, the angle θ between the first cam 702 and the crank section 701 is 180 ° - (α · i)21·i32)；
Typically, the swing angle α of the driving plate 500 is takenThe value is 15 deg., taking the total transmission ratio i of the gear set 621·i32When the angle θ between the first cam 702 and the crank section 701 is equal to 90 °, the single rotation angle of the driving shaft 7 is 90 °; of course, the pivot angle α and the overall transmission ratio i of the gear train 621·i32The values of (a) may be, but are not limited to, the values described above.
In one embodiment of the present application, as shown in fig. 5 to 9, 13 and 16, a cleaning mechanism is further installed in the cavity 400, the cleaning mechanism includes at least one air extractor 8 and a vent pipe 45, preferably two air extractors 8 are provided, two air extractors 8 are separately and fixedly installed at two sides below the driving shaft 7, the vent pipe 45 is communicated with communicating pipes 452 corresponding to the number of the air extractors 8, at least one air inlet pipe 451 and a plurality of air outlet pipes 453, the vent pipe 45 is located below the air extractor 8 and is communicated with the corresponding ports of the air extractor 8 through the communicating pipe 452, the air inlet pipe 451 is communicated with the outside of the slider 4, the number of air outlet grooves 460 equal to the number of the air outlet pipes 453 are provided in the lower end wall of the cavity 400 along the circumferential direction of the sliding chute 410, the specific number of the air outlet grooves 460 can be adjusted according to actual needs, for example, as shown in fig. 9, the number of the air outlet grooves 460 is four, the upper end of each air outlet groove 460 is communicated with the corresponding air outlet pipe 453, and the lower end of each air outlet groove 460 is communicated with the chute 410; meanwhile, a second cam 703 is fixedly mounted on the side portion of the first cam 702 on the driving shaft 7, the second cam 703 is matched with the air extractor 8, and an included angle between the second cam 703 and the crankshaft section 701 in the radial direction of the driving shaft 7 is 180 °, so that when the driving shaft 7 drives the lower portion of the punch 100 to slide to the outside of the slider 4 for punching, the second cam 703 is disengaged from the air extractor 8, so that the air extractor 8 pumps outside air into the air extractor 8 through the air inlet pipe 451, and then when the punch 100 slides in the sliding groove 410 after punching is completed, the second cam 703 is matched with the air extractor 8, so that the air pumped from the outside by the air extractor 8 is discharged into the sliding groove 410, so that the extrusion surface 110 of the punch 100 is cleaned, and the impact quality of the punch 100 is prevented from being affected by adhesion of impurities on the extrusion surface 110 of the punch 100.
It can be understood that the air pumping device 8 is an air pumping cylinder in the prior art, and comprises a cylinder body, a piston rod and a spring, wherein the lower port of the cylinder body is communicated with the communicating pipe 452, the piston is slidably installed in the cylinder body and is connected with the lower end of the piston rod, the upper end of the piston rod extends out of the cylinder body and is matched with the second cam 703, and the spring is sleeved on a rod section between the piston rod and the upper end surface of the cylinder body, so that when the second cam 703 is disengaged from the piston rod, the piston rod is driven to move upwards by the reset elastic force of the spring, and then the piston in the cylinder body is driven to move upwards to form negative pressure, external air can be pumped into the cylinder body along the air inlet pipe 451 by the negative pressure, and then when the second cam 703 is in press-fit with the piston rod, the piston rod moves downwards to drive the piston to discharge the air in the cylinder body into the sliding groove 410 through the air outlet groove 460. And the air inlet pipe 451 and the communicating pipe 452 are provided with check valves, by which it is ensured that the air drawn into the cylinder body can be discharged to the chute 410 only through the air outlet groove 460 along the air outlet pipe 453.
In this embodiment, as shown in fig. 17, when the punch 100 retracts to the highest position of the chute 410, the lower end of the air outlet groove 460 is lower than the position of the pressing surface 110 of the punch 100, so as to ensure that the air exhausted by the air exhaust device 8 can normally clean the pressing surface 110 of the punch 100.
In one embodiment of the present application, as shown in fig. 4, 6, 9, 11, 13 to 15, and 17 and 18, the detecting mechanism includes a plurality of light projection devices 91 and a number of photosensitive webs 92 equal to the number of light projection devices 91, meanwhile, first mounting grooves 440 with the same number as the light projection devices 91 are arranged in one half of the side walls of the sliding chute 410, the first mounting grooves 440 are uniformly distributed along the circumferential direction of the sliding chute 410, second mounting grooves 442 with the same number as the light sensing sheets 92 are arranged in the other half of the side walls of the sliding chute 410, the second mounting grooves 442 are uniformly distributed along the circumferential direction of the sliding chute 410, so that the first installation grooves 440 and the second installation grooves 442 are in one-to-one correspondence, the specific number of the first installation grooves 440 and the second installation grooves 442 can be adjusted according to actual needs, for example, as shown in fig. 9, the number of the first and second mounting grooves 440 and 442 is four. Meanwhile, the first mounting groove 440 is communicated with the slide groove 410 through a projection groove 441 arranged at the end, the second mounting groove 442 is directly communicated with the slide groove 410, and when the punch 100 is located at the highest position of the slide groove 410, the pressing surface 110 of the punch 100 is located within the height range of the projection groove 441 and the second mounting groove 442; the light ray projection device 91 is correspondingly installed in the first installation groove 440, the photosensitive sheet 92 is correspondingly installed in the second installation groove 442, so that the detection light rays 900 emitted by the light ray projection device 91 can be emitted to the photosensitive sheet 92 in the second installation groove 442 through the projection groove 441, and when the punch 100 is contracted to the highest position of the sliding groove 410, part of the detection light rays 900 can be shielded by the lower portion of the punch 100, namely, the height of the detection light rays 900 received by the photosensitive sheet 92 is reduced, so that the abrasion degree of the punch 100 can be judged according to the height change of the received detection light rays 900, and the photosensitive sheets 92 at different angular positions are simultaneously received, so that the detection precision of the detection mechanism can be effectively improved.
It is understood that the detection mechanism further includes a data processing module, which is a common prior art, and the data processing module is electrically connected to the photosensitive sheet 92, so that the detection light 900 received by the photosensitive sheet 92 is processed and recorded by the data processing module.
In one embodiment of the present application, a wear degree detecting method for a punch is provided, as shown in fig. 17 and 18, including the detecting mechanism in the above embodiments, and the detecting method for detecting the wear degree of the punch 100 by the detecting mechanism includes the following steps:
s100: initially, by retracting the punch 100 to the highest position of the chute 410, the photosensitive sheets 92 at different angular positions receive the shielded detection light 900 and record the height t01、t02、……、t0nWherein t is0nA height of the detection light 900 received by the photosensitive web 92 at an arbitrary position is indicated, and the recorded result is saved as an initial value;
s200: subsequently, in the process of punching by the punch 100, each time the punch 100 retracts to the highest position of the chute 410, the photosensitive sheets 92 at different angular positions receive the blocked detection light 900 and record the height tN01、tN02、……、tN0nWherein t isN0nIndicating that the photosensitive sheet 92 at any angular position records the height of the received detection light 900 when the punch 100 punches for the nth time;
s300: t will be obtained after each punch of the punch 100N0nValue sum t0nBy comparing the values of (a) and (b), the wear degree Δ h of the pressing surface 110 at any position during the nth punching of the punch 100 can be obtained in real timeN0n＝tN0n-t0n(ii) a So that when Δ hN0nIs less than a set safety threshold value deltah0Indicating that punch 100 can continue to be used when Δ h occursN0nIs greater than or equal to a set safety threshold value delta h0If the abrasion is abnormal, the next step is carried out;
s400: after the abrasion abnormal signal is obtained, the abrasion degree delta h of the N-1 th time of the abrasion abnormal position can be recorded(N-1)0nIs combined with Δ hN0nAnd (3) comparison:
(1) if the difference between the two is less than or equal to the preset error threshold Δ x, it indicates that the abnormal wear position is abnormal wear due to continuous wear, and at this time, it may be determined that the wear of the punch 100 exceeds the set safety threshold Δ h0That is, the punch 100 cannot be used continuously, and a new punch 100 needs to be replaced;
(2) if the difference value between the two is larger than a preset error threshold value delta x, stamping again to obtain the abrasion degree delta h of the (N + 1) th time(N+1)0nIf Δ h is(N+1)0nThe value of (a) is still larger than or equal to the set safety threshold value delta h0This indicates that punch 100 is damaged at the abnormal wear position, and it can be determined that the wear of punch 100 has indeed exceeded safety threshold Δ h0That is, the punch 100 can not be used any more, if Δ h(N+1)0nIs less than a set safety threshold value deltah0The nth detection result is interfered by the outside, for example, foreign objects are adhered, and the punch 100 can be used continuously.
In this embodiment, step S100 further includes the following steps:
S110：for t01、t02、……、t0nMaximum value of (1)0nmaxAnd a minimum value t0nminComparing the difference values, and if the difference value between the two values is smaller than a set error threshold value delta y, indicating that the installation of the light projection device 91 and the light sensing sheet 92 at each angle position meets the detection requirement, and at the moment, the detection mechanism is in a normal working state, so that the next step can be carried out; if the difference between the two values is greater than the predetermined error threshold Δ y, it indicates that the mounting position of the light projection device 91 or the photosensitive web 92 is abnormal, and the detection mechanism is mounted in an abnormal state, so that the next step cannot be performed, and the detection mechanism needs to be adjusted.
In this embodiment, the safety threshold Δ h0The value of the error threshold value delta x can be 10% -20% of the height of the projection groove 441, the value of the error threshold value delta x can be 0.5% -1% of the height of the projection groove 441, and the value of the error threshold value delta y can be 0.5% -2% of the height of the projection groove 441. It is understood that the specific value can be set according to the stamping precision of the workpiece.
The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.
Claims (10)
1. A punch assembly comprises a punch, a slider and a drive plate, wherein the punch is mounted at the bottom of the slider, the drive plate is rotatably connected with the side wall of the slider through a support shaft fixed at the end part so as to drive the slider to move up and down through the drive plate, the punch assembly is characterized in that a cavity is arranged in the slider, a drive shaft is rotatably mounted between two sides of the cavity and is matched with the support shaft through a gear set so as to drive the drive shaft to rotate through the rotation of the support shaft, a crankshaft section is arranged in the middle of the drive shaft, a sliding groove is arranged at the bottom of the cavity, the punch is slidably mounted in the sliding groove, and the punch is hinged with the crankshaft section through a connecting plate so as to slide up and down along the sliding groove under the drive of the crankshaft section, a grinding plate is mounted at the bottom end of the sliding groove and is suitable for grinding the side part of the extrusion surface of the punch when the punch slides along the sliding groove;
and a detection mechanism is further installed in the side wall of the sliding groove and is suitable for detecting the abrasion degree of the extrusion surface of the punch.
2. The punch assembly of claim 1, wherein: a supporting block is fixed at the upper end of the cavity, a first cam is fixedly installed on the side portion, located on the crankshaft section, of the driving shaft, and the short edge of the first cam is in sliding fit with the arc-shaped end of the lower end of the supporting block all the time; when the punch performs punching, the first cam is adapted to abut against an upper end surface of the punch through an end portion of a long side by being driven by the drive shaft.
3. The punch assembly of claim 2, wherein: the upper end of the connecting plate is rotatably connected with the crankshaft section, the lower end of the connecting plate is provided with a connecting groove, the upper end face of the punch is provided with a connecting seat, the connecting plate is connected with a pin shaft on the connecting seat through the connecting groove, and the length of the connecting groove is larger than the diameter of the pin shaft, so that when the punch punches, the punch is jacked to abut against the end part of the long edge of the first cam.
4. The punch assembly of claim 3, wherein: the gear train includes first gear, second gear and third gear, first gear install in the back shaft extends tip in the cavity, the second gear through the pivot with the lateral wall of cavity rotates and is connected, third gear fixed mounting in the tip of drive shaft, the second gear respectively with first gear and third gear mesh, first gear the second gear with the diameter of third gear reduces in proper order.
5. The punch assembly of claim 4, wherein: the cavity is internally provided with a cleaning mechanism, the cleaning mechanism comprises at least one air extractor and a vent pipe, the air extractor is fixedly arranged below the driving shaft, the vent pipe is communicated with a communicating pipe, an air inlet pipe and a plurality of air outlet pipes, the vent pipe is positioned below the air extractor and is communicated with the port of the air extractor through the communicating pipe, the air inlet pipe is communicated with the outside of the sliding block, a plurality of uniformly distributed air outlet grooves are arranged in the lower end wall of the cavity along the circumferential direction of the sliding groove, the upper ends of the air outlet grooves are correspondingly communicated with the air outlet pipes, and the lower ends of the air outlet grooves are communicated with the sliding groove; and a second cam is fixedly arranged on the driving shaft and is matched with the air extracting device, so that when the punch slides into the cavity, the second cam drives the air extracting device to discharge air sucked from the outside into the sliding chute.
6. The punch assembly of claim 5, wherein: when the punch is contracted to the highest position of the sliding groove, the lower end of the air outlet groove is positioned below the extrusion surface of the punch.
7. The punch assembly of any one of claims 1-6, wherein: the detection mechanism comprises a plurality of light projection devices and a plurality of photosensitive pieces, a plurality of first mounting grooves which are uniformly distributed along the circumferential direction are arranged in one half side wall of the sliding groove, a plurality of second mounting grooves which are uniformly distributed along the circumferential direction are arranged in the other half side wall of the sliding groove, the first mounting groove is communicated with the sliding groove through a projection groove arranged at the end part, the second mounting groove is communicated with the sliding groove, the first mounting groove and the second mounting groove are in one-to-one correspondence, the light projection devices are correspondingly arranged in the first mounting groove, the photosensitive pieces are correspondingly arranged in the second mounting groove, the light projection devices are suitable for emitting detection light to the second mounting groove through the projection groove, and the photosensitive pieces are suitable for receiving the detection light so that when the punch is contracted to the highest position of the sliding groove, the extrusion surface of the punch is located in the height range of the projection groove, so that part of the detection light is shielded, and the photosensitive sheet is suitable for detecting the abrasion degree of the punch according to the shielded detection light.
8. A punch wear degree detection method is characterized by comprising the following steps: a method of detecting a degree of wear of a punch by the detection mechanism including the detection mechanism of claim 7, comprising the steps of:
s100: initially, the punch is contracted to the highest position of the sliding groove, and the photosensitive film receives the shielded detection light and records the height as t01、t02、……、t0nWherein t is0nIndicating the height of the detection light received by the photosensitive sheet at any position;
s200: in the process of punching by the punch, when the punch shrinks to the highest position of the sliding groove each time, the photosensitive film can receive the shielded detection light and record the height as tN01、tN02、……、tN0nWherein t isN0nIndicating the height of the detection light received by any position recorded by the photosensitive film when the punch punches for the Nth time;
s300: by mixing tN0nAnd t0nThe values are compared, so that the abrasion degree delta h of the extrusion surface at any position during the Nth punching of the punch can be obtained in real timeN0n＝tN0n-t0n(ii) a When Δ hN0nIs less than a set safety threshold value deltah0When Δ h occurs, it indicates that the punch can continue to be usedN0nIs greater than or equal to a set safety threshold value delta h0If the abrasion is abnormal, the next step is carried out;
s400: to the Nth position of the wear anomalyDegree of wear Δ h of 1(N-1)0nAnd Δ hN0nComparing, and if the difference between the two is less than or equal to a preset error threshold value delta x, judging that the abrasion of the punch exceeds a set safety threshold value delta h0Namely, the punch cannot be used continuously; if the difference value between the two is larger than a preset error threshold value delta x, stamping again to obtain the abrasion degree delta h of the (N + 1) th time(N+1)0nIf Δ h(N+1)0nThe value of (a) is still larger than or equal to the set safety threshold value delta h0It means that the wear of the punch surely exceeds the set safety threshold Δ h0That is, the punch cannot be used continuously, if Δ h(N+1)0nIs less than a set safety threshold value deltah0I.e. indicating that the punch can continue to be used.
9. The punch wear degree detecting method according to claim 8, characterized in that: step S100 further includes the steps of:
s110: get t01、t02、……、t0nMaximum value of (1)0nmaxAnd a minimum value t0nminComparing the difference values, and if the difference value between the two is smaller than a set error threshold value delta y, indicating that the detection mechanism is in a normal working state, and performing the next step; if the difference value between the two is larger than the set error threshold value delta y, the mounting position of the detection mechanism is abnormal, the next step cannot be carried out, and the detection mechanism needs to be adjusted.
10. The punch wear degree detecting method according to claim 9, characterized in that: safety threshold value delta h0The value of the error threshold value delta x is 10% -20% of the height of the projection groove, the value of the error threshold value delta x is 0.5% -1% of the height of the projection groove, and the value of the error threshold value delta y is 0.5% -2% of the height of the projection groove.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021110296632 | 2021-09-03 | ||
| CN202111029663.2A CN113458259A (en) | 2021-09-03 | 2021-09-03 | Punch assembly and punch wear degree detection method |
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| CN114043323A true CN114043323A (en) | 2022-02-15 |
| CN114043323B CN114043323B (en) | 2022-08-23 |
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| CN202111193450.3A Active CN114043323B (en) | 2021-09-03 | 2021-10-13 | Punch assembly and punch wear degree detection method |
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| CN202111029663.2A Withdrawn CN113458259A (en) | 2021-09-03 | 2021-09-03 | Punch assembly and punch wear degree detection method |
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| JP2000117519A (en) * | 1998-10-14 | 2000-04-25 | Howa Mach Ltd | Drill breakage detecting device |
| US20060243013A1 (en) * | 2003-02-14 | 2006-11-02 | Srecko Zdravkovic | Automated monitoring for clinching joints |
| CN201494031U (en) * | 2009-08-11 | 2010-06-02 | 段巧荣 | Crankshaft driving mechanism of pressing machine |
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| CN109332512A (en) * | 2018-12-06 | 2019-02-15 | 鸿运汽车有限公司 | A kind of transmission and stamping device |
| CN112792249A (en) * | 2021-04-02 | 2021-05-14 | 浙江易锻精密机械有限公司 | Overload protection system for crank press |
| CN113245425A (en) * | 2021-06-23 | 2021-08-13 | 浙江易锻精密机械有限公司 | Automatic feeding and discharging device for stamping |
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2021
- 2021-09-03 CN CN202111029663.2A patent/CN113458259A/en not_active Withdrawn
- 2021-10-13 CN CN202111193450.3A patent/CN114043323B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000117519A (en) * | 1998-10-14 | 2000-04-25 | Howa Mach Ltd | Drill breakage detecting device |
| US20060243013A1 (en) * | 2003-02-14 | 2006-11-02 | Srecko Zdravkovic | Automated monitoring for clinching joints |
| CN201494031U (en) * | 2009-08-11 | 2010-06-02 | 段巧荣 | Crankshaft driving mechanism of pressing machine |
| CN104226768A (en) * | 2014-09-09 | 2014-12-24 | 宁波市科斯顿精工机械有限公司 | Connecting rod punch press |
| CN106696326A (en) * | 2016-12-21 | 2017-05-24 | 宁波澳玛特高精冲压机床股份有限公司 | Punching device for punching machine |
| CN109332512A (en) * | 2018-12-06 | 2019-02-15 | 鸿运汽车有限公司 | A kind of transmission and stamping device |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN114043323B (en) | 2022-08-23 |
| CN113458259A (en) | 2021-10-01 |
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Effective date of registration: 20230823 Address after: 215000 40 Jiangpu Road, Shengpu Town, Suzhou Industrial Park, Jiangsu Province Patentee after: SUZHOU LILAI XINGCHEN PLASTIC INDUSTRY SCIENCE & TECHNOLOGY CO.,LTD. Address before: 315700 Dalin village, huangbiao Township, Xiangshan County, Ningbo City, Zhejiang Province Patentee before: ZHEJIANG YIDUAN PRECISION MACHINERY CO.,LTD. |
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