On-line weighing apparatus for string of cold-pressed tablets

Abstract

The online weighing equipment for string bead cold-pressed blanks provided by the utility model can collect the string bead cold-pressed blanks prepared by the full-automatic cold-pressing equipment according to weight and lays a foundation for loading the string bead cold-pressed blanks with less weight difference in the same sintering mold in the subsequent sintering process, and fundamentally solves the industry problems of low service life of string bead sintering graphite molds and unstable quality of string beads.

Description

Technical Field

[0001] This utility model relates to the field of diamond bead blank weighing technology, specifically to an online weighing device for cold-pressed bead blanks. Background Technology

[0002] Diamond wire saws are widely used cutting tools for materials such as stone and concrete. They mainly consist of a steel wire rope and beads spaced along the wire rope. The beads are a crucial component of the diamond wire saw, and their manufacturing quality is closely related to the overall quality of the saw. Current bead manufacturing technology typically involves: first, automatically cold-pressing a diamond powder mixture with a steel bead matrix to form a bead cold-pressed blank; then, placing the blank into a graphite mold for sintering. The bead cold-pressed blank typically includes a central steel bead matrix 15 and a working bead layer 16 encircling the steel bead matrix 15, as shown in the attached diagram. Figure 6 As shown. The weight of the beaded cold-pressed billet is mostly positively correlated with the length of the working layer of the beaded cold-pressed billet. If the weight of the beaded cold-pressed billet is inconsistent, it means that the length of the working layer of the beaded cold-pressed billet is inconsistent.

[0003] During the sintering process, the beaded cold-pressed blank needs to be fitted with an upper pressure head 17 and a lower pressure head 18 at both ends, and then placed between an upper pad 19 and a lower pad 20 for sintering. (See attached...) Figure 7 As shown, each mold requires the simultaneous installation and sintering of over 100 beaded cold-pressed blanks. This results in beads with longer working layers being prone to damage during sintering due to excessive pressure on the upper and lower pressing heads caused by their high working layer density. Conversely, beads with shorter working layers suffer from lower working layer density, leading to poorer performance. These issues are among the main reasons for the short lifespan of the sintering graphite molds and unstable bead quality. Currently, these problems are mainly addressed by frequently adjusting automatic cold pressing and sintering process parameters and replacing the cold pressing molds. However, frequent parameter and equipment changes directly lead to low production efficiency and increased production costs. More seriously, the problems of short sintering graphite mold lifespan and unstable bead quality have not been fundamentally solved; the sintering graphite mold lifespan remains inconsistent, and the stability of bead quality has not been significantly improved.

[0004] Based on the above shortcomings, this application proposes an online weighing device for beaded cold-pressed billets, which classifies the beaded cold-pressed billets formed by fully automatic cold pressing according to their weight. During the subsequent sintering process, each mold sintersets beaded cold-pressed billets of similar weight in the same grade, which can effectively reduce the adverse effects caused by the large difference in the length of the working layer of the beads, and fundamentally solve the industry problems of low life of sintered graphite molds and unstable bead quality. Utility Model Content

[0005] This utility model provides an online weighing device for beaded cold-pressed billets, which can classify beaded cold-pressed billets prepared by fully automatic cold-pressing equipment according to weight, so that beaded cold-pressed billets with small weight differences can be loaded into the same mold for sintering during the subsequent sintering process, effectively reducing the adverse effects caused by large weight differences in the working layer of beads.

[0006] To achieve the above-mentioned technical objectives and effects, this utility model solves the above-mentioned problems through the following technical solution:

[0007] An online weighing device for beaded cold-pressed billets includes a cold-pressed billet conveying mechanism and a cold-pressed billet sizing mechanism. The cold-pressed billet conveying mechanism conveys the beaded cold-pressed billets to the cold-pressed billet sizing mechanism. The cold-pressed billet conveying mechanism includes a conveying base, with at least two sets of rolling bearing assemblies mounted on the top of the conveying base along the conveying direction. The cold-pressed billet conveying plate is placed on the rolling bearing assemblies. A conveying plate driving device is mounted on the conveying base, and the output end of the conveying plate driving device is hinged to the cold-pressed billet conveying plate. The cold-pressed billet conveying plate has powder discharge holes, and the top of the conveying base has a discharge trough longitudinally corresponding to the powder discharge holes. A waste bin is set inside the base.

[0008] The cold-pressed billet grading mechanism includes a grading base and a cold-pressed billet transfer plate installed on the top of the grading base. An annular transfer guide groove is opened on the top surface of the cold-pressed billet transfer plate to allow the beaded cold-pressed billets to pass through. A lever driving device is installed on the lower part of the top surface of the grading base. The spindle of the lever driving device passes through the top surface of the grading base and is keyed to a bead lever. The bead head of the bead lever is slidably engaged with the annular transfer guide groove.

[0009] The cold-pressed billet conveyor plate has a weighing port corresponding to the discharge position of the cold-pressed billet conveyor plate. The dividing base has a weighing mounting platform at the longitudinal position corresponding to the weighing port. A weighing device is installed on the weighing mounting platform. The weighing device includes an electronic scale, a shock-absorbing pad installed between the electronic scale and the weighing mounting platform, and a weighing pad installed on the electronic scale. The top surface of the weighing pad is higher than the bottom surface of the annular conveyor guide groove.

[0010] The cold-pressed billet conveyor has N feeding ports arranged sequentially along the circumference, where N is a positive integer greater than or equal to 2; the top plate of the dividing base has dropping holes corresponding to the number and position of the feeding ports, and the bottom of the dropping holes is connected to a material distribution box, wherein the first to N-1 feeding ports are equipped with door lock mechanisms; a photoelectric switch is configured between the weighing port and the Nth feeding port; and a main control device is installed on the lower part of the conveying base.

[0011] Furthermore, the conveying track at the top of the cold-pressed billet conveying plate is an arc-shaped track structure that gradually decreases in size along the conveying direction, and the track cross-section gradually changes from a rectangle to a semi-circle located in the middle; the rolling bearing assembly on the top of the conveying base near the cold-pressed billet grading mechanism is installed at a greater height than the rolling bearing assembly in front of it, and the cold-pressed billet conveying plate has an upward tilt angle of 2° to 10° with the front lower and the back higher.

[0012] Furthermore, the rolling bearing assembly consists of two sets arranged in the front and rear directions along the transmission direction. The powder drop hole is located on the cold-pressed billet conveying plate between the two sets of rolling bearing assemblies. The rolling bearing assembly includes a spindle, a bearing, and a housing. The two ends of the spindle are respectively connected to the left and right side plates at the top of the conveying base 1. The bearing is installed on the spindle, and the outer ring of the bearing is connected to the housing.

[0013] Furthermore, the door lock mechanism includes a sliding door that slides radially along the cold-pressed billet transport disk, and a door lock drive device for driving the sliding door. The cold-pressed billet transport disk has a sliding groove that slides with the sliding door, and the door lock drive device is a push-pull electromagnet. The sliding door has a sliding door guide groove that is longitudinally aligned with the annular transport guide groove of the cold-pressed billet transport disk, allowing the beaded cold-pressed billet to pass through. The sliding door guide groove and the annular transport guide groove have the same cross-sectional shape. The width of the input end of the sliding door guide groove is 0mm to 2mm larger than the width of the annular transport guide groove, and the width of the output end of the sliding door guide groove is 0mm to 2mm smaller than the width of the annular transport guide groove.

[0014] Furthermore, the lever drive device includes a reducer and a drive motor that are longitudinally mounted on the bottom of the top plate of the dividing base. The output shaft of the lever drive device passes through the top plate of the dividing base and connects to the lever rod. One end of the lever rod has a lever head that cooperates with the annular transmission guide groove, and the other end is designed with a counterweight to balance the lever body.

[0015] Furthermore, the conveyor plate driving device adopts a push-pull electromagnet fixed to the top of the conveyor base.

[0016] The advantages and effects of this utility model are:

[0017] This device can classify and collect beaded cold-pressed blanks prepared by fully automatic cold-pressing equipment online according to weight, laying the foundation for loading beaded cold-pressed blanks with small weight differences into the same sintering mold in the subsequent sintering process. This effectively reduces the large fluctuations in bead sintering quality and sintering graphite mold life caused by large differences in the weight of the bead working layer, and is expected to fundamentally solve the industry problems of low sintering graphite mold life and unstable bead quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the online weighing device for beaded cold-pressed blanks of this utility model;

[0019] Figure 2(a) is a top view of the cold-pressed billet conveyor plate;

[0020] Figure 2(b) is a left view of the cold-pressed billet conveyor plate;

[0021] Figure 3 Top view of the cold-pressed billet grading mechanism;

[0022] Figure 4 This is a top view of the cold-pressed billet transfer disc;

[0023] Figure 5 For along Figure 4 Sectional view of the middle BB line;

[0024] Figure 6 This is a schematic diagram of the structure of a beaded cold-pressed preform;

[0025] Figure 7 This is a schematic diagram of the bead sintering mold structure.

[0026] Drawing number identifier:

[0027] 1. Conveying base; 2. Rolling bearing assembly; 3. Cold-pressed billet conveying plate; 3-1. Powder discharge hole; 4. Conveying plate drive device; 5. Waste bin; 6. Dividing base; 6-1. Material discharge hole; 7. Cold-pressed billet transmission disc; 7-1. Annular transmission guide groove; 7-2. Weighing port; 7-3. Discharge port; 8. Lever drive device; 9. Bead lever; 10. Weighing device; 10-1. Shock-absorbing pad; 10-2. Electronic scale; 10-3. Weighing pad; 11. Dividing box; 12. Door lock mechanism; 12-1. Sliding door; 12-2. Door lock drive device; 13. Main control device; 14. Photoelectric switch; 15. Beaded steel base; 16. Beaded working layer; 17. Upper pressure head; 18. Lower pressure head; 19. Upper pad; 20. Lower pad. Detailed Implementation

[0028] The present invention will be further described below with reference to the embodiments, but the present invention is not limited to these embodiments.

[0029] The online weighing device for cold-pressed billets described in this embodiment is as follows: Figure 1 As shown, it includes a cold-pressed billet conveying mechanism and a cold-pressed billet grading mechanism. In this embodiment, the side where the cold-pressed billet conveying mechanism is located is the front, and the side where the cold-pressed billet grading mechanism is located is the rear. The cold-pressed billet conveying mechanism orderly conveys the beaded cold-pressed billets to the cold-pressed billet grading mechanism for weighing, and the cold-pressed billet grading mechanism orderly conveys the beaded cold-pressed billets to the material distribution box for archiving.

[0030] The main body of the cold-pressed billet conveying mechanism includes a conveying base 1, rolling bearing assemblies 2, a cold-pressed billet conveying plate 3, a conveying plate drive device 4, and a waste bin 5. Two sets of rolling bearing assemblies 2 are installed on the top of the conveying base 1 along the conveying direction. The rolling bearing assemblies 2 are installed between the left and right side plates on the top of the conveying base 1, and include a mandrel connected to the side plates at both ends and bearings mounted on the mandrel. The outer ring of the bearing is connected to the housing and rotates freely. The bearings are self-sealed double-row rolling bearings. The two rolling bearing assemblies 2 have a height difference, with the rear rolling bearing assembly 2 being higher. Therefore, the cold-pressed billet conveying plate 3, placed on the two sets of rolling bearing assemblies 2, has an upward tilt angle of 2° to 10°, with the front lower than the rear. This appropriate tilt angle avoids affecting the weighing when conveying multiple cold-pressed billets at once.

[0031] The conveyor plate drive device 4 is fixed to the top of the conveyor base 1. It adopts a push-pull electromagnet, and the output end of the conveyor plate drive device 4 is hinged to the cold-pressed billet conveyor plate 3, driving the plate to reciprocate back and forth. As shown in Figures 2(a, b), the cold-pressed billet conveyor plate 3 includes a bottom plate and a top conveyor track. The top conveyor track is an arc-shaped track structure that gradually decreases in size along the conveying direction, and the track cross-section gradually changes from a rectangle to a semi-circle in the middle. The beaded cold-pressed billets falling onto the cold-pressed billet conveyor plate 3 are gradually conveyed to the cold-pressed billet sorting mechanism under the alternating action of the electromagnetic force and spring force provided by the conveyor plate drive device 4.

[0032] The cold-pressed billet conveying plate 3 has multiple longitudinal powder dropping holes 3-1 corresponding to the position between the two sets of rolling bearing assemblies 2. The top of the conveying base 1 has a material dropping groove corresponding to the longitudinal direction of the powder dropping holes 3-1. The waste bin 5 is set in the conveying base 1 to receive the vibrating screen waste powder falling from the powder dropping holes 3-1.

[0033] As attached Figure 1 , 3 As shown in Figures 4 and 5, Figure 1 The cold-pressed billet grading mechanism on the right side is along... Figure 3 A sectional view of line AA. The cold-pressed billet grading mechanism includes a grading base 6, a cold-pressed billet transfer plate 7, a lever drive device 8, a beaded rod 9, a weighing device 10, a material distribution box 11, and a door lock mechanism 12. The cold-pressed billet transfer plate 7 is fixed to the top plate of the grading base 6. An annular transmission guide groove 7-1 is opened on the top surface of the cold-pressed billet transfer plate 7 to allow the beaded cold-pressed billets to pass through. The beaded cold-pressed billets output by the cold-pressed billet conveying mechanism fall into the weighing port 7-2 in the annular transmission guide groove 7-1. The lever drive device 8 is installed on the bottom surface of the top plate of the grading base 6. The lever drive device 8 mainly includes a reducer and a drive motor. The output shaft of the lever drive device 8 passes through the top plate of the grading base 6 and is connected to the middle of the beaded rod 9, driving the beaded rod 9 to rotate circumferentially. One end of the bead-pulling rod 9 has a bead-pulling head that mates with the annular transmission guide groove 7-1, and the other end is designed with a counterweight balance rod. The beaded cold-pressed blank can slide unidirectionally along the annular transmission guide groove 7-1 under the push of the bead-pulling head.

[0034] A weighing port 7-2 is provided on the cold-pressed billet conveyor plate 7 corresponding to the discharge position of the cold-pressed billet conveyor plate 3. A weighing mounting platform is set at the longitudinal position of the dividing base 6 corresponding to the weighing port 7-2, and a weighing device 10 is installed on the weighing mounting platform. The weighing device 10 includes a shock-absorbing pad 10-1, an electronic scale 10-2, and a weighing pad 10-3, which are fixedly connected from bottom to top. The weighing pad 10-3 is fixed to the weighing panel of the electronic scale 10-2, and the electronic scale 10-2 can weigh objects falling on the weighing pad 10-3. The top surface of the weighing pad 10-3 is 0-0.5 mm higher than the bottom surface of the annular conveyor guide groove 7-1 to ensure that the bead-pulling rod 9 can effectively push out the string of cold-pressed billets after weighing.

[0035] In this embodiment, the cold-pressed billet transfer disc 7 has N=5 feeding ports 7-3 (as shown in the attached figure) spaced clockwise. Figure 3 (As indicated by arrow F), the top plate of the graded base 6 has dropping holes 6-1 corresponding to the number and position of the dropping ports 7-3. A distribution box 11 is installed at the bottom of each dropping hole 6-1 to collect the falling beaded cold-pressed blanks. The dropping ports 7-3, from 1 to N, correspond to progressively increasing or decreasing weight ranges. Door lock mechanisms 12 are installed at the 1st to 4th dropping ports 7-3 along arrow F to control their opening and closing. The last dropping port 7-3 (the 5th dropping port 7-3) may not have a door lock mechanism 12. The beaded cold-pressed blanks in the annular transmission guide trough 7-1 are emptied at the last dropping port 7-3. A photoelectric switch 14 is installed between the weighing port 7-2 and the 5th dropping port 7-3 so that the bead-pulling rod 9 stops rotating each time it reaches the position of the photoelectric switch 14, waiting for the weighing device 10 to weigh it. The material distribution box 11 is installed on the horizontal partition plate in the middle of the dividing base 6. Each material distribution box 11 is equipped with an inclined plate. The distance between the upper part of the inclined plate and the bottom of the opening is 1mm to 5mm, so as to prevent damage to the cold-pressed billet of the beads falling into the opening. A vibration damping pad can be placed at the bottom of the dividing base 6 to protect the electronic scale 10-2 from vibration interference.

[0036] The door lock mechanism 12 includes a sliding door 12-1 and a door lock drive device 12-2. The cold-pressed billet transfer plate 7 has a radial groove corresponding to the position of the discharge port 7-3 (the last discharge port 7-3 may not have a groove). The door lock drive device 12-2 is installed on the top plate of the dividing base 6. The output end of the door lock drive device 12-2 is connected to the sliding door 12-1 to drive it to slide along the radial groove to control the opening and closing of the discharge port 7-3. In this embodiment, the door lock drive device 12-2 adopts a push-pull electromagnet. A sliding door guide groove is provided on the sliding door 12-1, which is longitudinally aligned with the annular transmission guide groove 7-1 of the cold-pressed billet transmission plate 7, allowing the beaded cold-pressed billet to pass through. The sliding door guide groove and the annular transmission guide groove 7-1 have the same cross-sectional shape. The width of the input end of the sliding door guide groove is 0mm to 2mm larger than the width of the annular transmission guide groove 7-1, and the width of the output end of the sliding door guide groove is 0mm to 2mm smaller than the width of the annular transmission guide groove 7-1. Under the above size limit, it can be ensured that the beaded cold-pressed billet can pass through the sliding door 12-1 smoothly.

[0037] The conveyor plate drive device 4, the lever drive device 8, the weighing device 10, the door lock mechanism 12 and the photoelectric switch 14 are connected to the main control device 13, which is installed on the conveyor base 1 of the cold pressing billet conveying mechanism.

[0038] The working process of the online weighing device for cold-pressed billets described in this embodiment is as follows:

[0039] 1. The beaded cold-pressed billet falls into the cold-pressed billet conveying plate 3 through the front conveyor plate. The conveying plate driving device 4 drives the cold-pressed billet conveying plate 3, which is placed on the rolling bearing assembly 2, to reciprocate, so that the beaded cold-pressed billet is conveyed one by one to the cold-pressed billet transfer plate 7 and falls into the weighing device 10 for weighing.

[0040] 2. The weighing device 10 outputs a signal to the main control device 13, and the main control device 13 controls the corresponding door lock mechanism 12 to open the sliding door 12-1, exposing the material discharge hole 6-1.

[0041] 3. Start the lever drive device 8 to drive the bead lever 9 to rotate. The bead lever 9 pushes the beaded cold-pressed billet out of the weighing port 7-2 and rotates clockwise along the annular transmission guide groove 7-1. When it passes through the opened sliding door 12-1, the beaded cold-pressed billet falls into the corresponding material box 11 through the discharge hole 6-1. Otherwise, it falls into the material box 11 corresponding to the last discharge port 7-3.

[0042] 4. When the bead lever 9 rotates to the photoelectric switch 14, the photoelectric switch 14 outputs a signal, and the main control device 13 controls the lever drive device 8 to stop rotating, and controls the door lock mechanism 12 to close the opened sliding door 12-1. This completes the sorting of a beaded cold-pressed billet by weight, and then the above steps are repeated to achieve continuous sorting of beaded cold-pressed billets.

[0043] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations of these embodiments without departing from the principles and spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. An online weighing device for cold-pressed beaded billets, characterized in that: It includes a cold-pressed billet conveying mechanism and a cold-pressed billet sorting mechanism. The cold-pressed billet conveying mechanism transports the beaded cold-pressed billet to the cold-pressed billet sorting mechanism. The cold-pressed billet conveying mechanism includes a conveying base (1), at least two sets of rolling bearing assemblies (2) are installed on the top of the conveying base (1) along the conveying direction, and the cold-pressed billet conveying plate (3) is placed on the rolling bearing assemblies (2); a conveying plate driving device (4) is installed on the conveying base (1), and the output end of the conveying plate driving device (4) is hinged to the cold-pressed billet conveying plate (3); the cold-pressed billet conveying plate (3) has a powder discharge hole (3-1), the top of the conveying base (1) has a discharge groove corresponding longitudinally to the powder discharge hole (3-1), and a waste bin (5) is set inside the conveying base (1); The cold-pressed billet grading mechanism includes a grading base (6) and a cold-pressed billet transfer disk (7) installed on the top of the grading base (6). The top surface of the cold-pressed billet transfer disk (7) is provided with an annular transfer guide groove (7-1) for the beaded cold-pressed billets to pass through. A lever drive device (8) is installed on the lower part of the top surface of the grading base (6). The spindle of the lever drive device (8) passes through the top surface of the grading base (6) and is keyed to a bead lever (9). The bead head of the bead lever (9) slides in conjunction with the annular transfer guide groove (7-1). The cold-pressed billet conveyor plate (7) has a weighing port (7-2) corresponding to the discharge position of the cold-pressed billet conveyor plate (3). The dividing base (6) has a weighing mounting platform at a longitudinal position corresponding to the weighing port (7-2). A weighing device (10) is installed on the weighing mounting platform. The weighing device (10) includes an electronic scale (10-2), a shock-absorbing pad (10-1) installed between the electronic scale (10-2) and the weighing mounting platform, and a weighing pad (10-3) installed on the electronic scale (10-2). The top surface of the weighing pad (10-3) is higher than the bottom surface of the annular transmission guide groove (7-1). The cold-pressed billet transfer plate (7) has N feeding ports (7-3) arranged in sequence along the circumference, where N is a positive integer greater than or equal to 2; the top plate of the dividing base (6) has a dropping hole (6-1) corresponding to the number and position of the feeding ports (7-3), and the bottom of the dropping hole (6-1) is supported by a material distribution box (11), wherein the first to N-1 feeding ports (7-3) are equipped with a door lock mechanism (12); a photoelectric switch (14) is configured between the weighing port (7-2) and the Nth feeding port (7-3); a main control device (13) is installed on the lower part of the conveying base (1).

2. The online weighing device for beaded cold-pressed billets according to claim 1, characterized in that: The top of the cold-pressed billet conveying plate (3) is a curved track structure that gradually decreases in size along the conveying direction, and the track cross section gradually changes from a rectangle to a semi-circle located in the middle. The rolling bearing assembly (2) on the top of the conveying base (1) near the cold pressing billet grading mechanism is installed at a height greater than the rolling bearing assembly (2) on its front side, and the cold pressing billet conveying plate (3) has an inclination angle of 2° to 10° with the front lower and the back higher.

3. The online weighing device for beaded cold-pressed billets according to claim 2, characterized in that: The rolling bearing assembly (2) consists of two sets arranged in the front and rear directions along the transmission direction. The powder drop hole (3-1) is located on the cold-pressed billet conveying plate (3) between the two sets of rolling bearing assemblies (2). The rolling bearing assembly (2) includes a spindle, a bearing and a housing. The two ends of the spindle are respectively connected to the left and right side plates on the top of the conveying base (1). The bearing is installed on the spindle and the outer ring of the bearing is connected to the housing.

4. The online weighing device for beaded cold-pressed billets according to claim 1, characterized in that: The door lock mechanism (12) includes a sliding door (12-1) that slides radially along the cold-pressed billet transfer plate (7), and a door lock drive device (12-2) that drives the sliding door (12-1). The cold-pressed billet transfer plate (7) has a sliding groove that slides with the sliding door (12-1). The door lock drive device (12-2) is a push-pull electromagnet. The sliding door (12-1) has a sliding door guide groove that is longitudinally aligned with the annular transmission guide groove (7-1) of the cold-pressed blank transmission plate (7) so that the beaded cold-pressed blank can pass through. The sliding door guide groove and the annular transmission guide groove (7-1) have the same cross-sectional shape. The width of the input end of the sliding door guide groove is 0mm to 2mm larger than the width of the annular transmission guide groove (7-1), and the width of the output end of the sliding door guide groove is 0mm to 2mm smaller than the width of the annular transmission guide groove (7-1).

5. The online weighing device for beaded cold-pressed billets according to claim 1, characterized in that: The lever drive device (8) includes a reducer and a drive motor that are longitudinally installed at the bottom of the top plate of the dividing base (6). The output shaft of the lever drive device (8) passes through the top plate of the dividing base (6) and connects to the bead rod (9). One end of the bead rod (9) has a bead head that cooperates with the annular transmission guide groove (7-1), and the other end is designed with a counterweight to balance the rod body.

6. The online weighing device for beaded cold-pressed billets according to claim 1, characterized in that: The conveyor plate drive device (4) is a push-pull electromagnet fixed to the top of the conveyor base (1).

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