Precise double-sided oilstone multi-station automatic forming machine

Abstract

The present application relates to a precision double-sided oilstone multi-station automatic forming machine, comprising a rotating device, the rotating device comprising a central column, a driving mechanism, a large turntable arranged on the central column, and an upper rack and a lower rack fixed to the central column and located on the upper and lower sides of the large turntable respectively; the driving mechanism is in gear transmission with the large turntable, and a plurality of molds are arranged on the circumferential side of the large turntable; a circular slide for carrying the mold movement is arranged on the lower rack; the circumferential side of the rotating device is sequentially provided with a bottom plate resetting device, a primary weighing and feeding device, a first layer material scraping and flattening device, a first layer material scraping and flattening device, a pre-pressing press, a pre-pressing head cleaning device, a secondary weighing and feeding device, a second layer material scraping and flattening device, a second layer material scraping and flattening device, a final pressing press, a final pressing head cleaning device, and a bottom plate ejection device. The present application has compact structure and reasonable layout, can realize the mechanized automatic processing of oilstone, has high degree of automation and high production efficiency in the whole manufacturing process, and has good quality of the formed oilstone.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of abrasive production, in particular to a precision double-sided oilstone multi-station automatic forming machine. BACKGROUND

[0002] Oilstone is a special kind of fixed abrasive, which has a wide range of uses, and can be used for hand grinding tools and parts, and can also be clamped on special machine tools for honing and superfinishing. Therefore, oilstone is a relatively major product of abrasive manufacturing enterprises, and the forming process, as a major process of oilstone manufacturing, has an important influence on the internal and external quality.

[0003] At present, the oilstone forming method is as follows: first, manual assembly of the mold, manual feeding, manual stirring and scraping; then, the mold is sent into the press for pressing; the mold wedge is manually removed, and the product is taken out. This operation mode has the following problems: A) the product quality is affected by human factors, and the process control is difficult; B) it is not easy to realize double-sided pressing, and the density deviation of the oilstone blank thickness direction is large; C) the mold needs to be manually carried, lifted and knocked, and the labor intensity is large; D) the overall machine output is low, the efficiency per person is low, more personnel are used, and it is difficult to realize automatic production.

[0004] There is also an automated mechanical device for making oil stone, its working principle is: A) the main machine is two equal pressure four-column hydraulic machine arranged coaxially; B) a plurality of molds are installed on the scraping workbench, which is fixedly connected with the machine frame. The upper surface of the mold sleeve is flush with the scraping workbench, the mold bottom plate is connected with the lower machine slide, and the mold cover plate is installed on the upper machine slide. C) The scraping hopper is arranged on both sides of the workbench, one side is a coarse material scraping hopper, and the other side is a fine material scraping hopper. The scraping hopper is filled with molding material, and the bottom is in contact with the scraping workbench and is closed to form the molding material. The scraping hopper is driven by a hydraulic cylinder to slide back and forth on the scraping workbench. D) The lower machine drives the mold bottom to go up, so that the mold forms the required mold cavity depth (volume) for coarse material scraping. The coarse material scraping hopper moves back and forth above the mold once, so that the molding material in the coarse material scraping hopper flows into the mold cavity and is scraped flat based on the scraping workbench (the upper surface of the mold sleeve). E) The upper machine drives the mold cover plate to go down and press into the mold cavity, completing the coarse material pre-pressing. Under the pressure, the lower machine goes down to form the required mold cavity depth for fine material scraping. F) The upper machine returns, and the fine material scraping hopper moves back and forth above the mold once, so that the molding material in the fine material scraping hopper flows into the mold cavity and is scraped flat based on the scraping workbench (the upper surface of the mold). G) The upper machine drives the upper cover plate to go down and directly press into the mold cavity. After reaching a certain pressure (or stroke), the lower machine goes up, and the upper and lower machines press the molding material at the same time until the molding pressure (or the thickness of the blank) is reached, and then the upper machine returns to the position. H) The lower machine goes up to eject the blank, which is taken away by hand. The compressed air nozzle blows off the fine material on the workbench, which is collected by the dust collection device, and then the next cycle of forming operation is performed.

[0005] The above device has high mechanization degree and working efficiency, and is a standard double-sided pressing. The density uniformity in the thickness direction of the blank is good. However, there are also the following problems: A) The molding material enters the mold cavity and is scraped flat by its own weight and fluidity, and cannot be stirred. The distribution of the molding material in the mold cavity is uneven, and the gas in the molding material is not easy to discharge. Especially for fine material with poor fluidity, the arch bridge effect is obvious, and local cavities are easily formed, which affects the quality of the finished product. B) Due to the constant volume feeding, the weight of the molding material fed into the mold cavity fluctuates greatly for oil stone molding material with fine particle size and poor fluidity, thereby affecting the product performance. If constant pressure molding is used to ensure the density of the blank, the thickness size of the blank will be deviated. If constant mold molding is used to ensure the product size, the density of the blank will be deviated. C) Because the oil stone molding material is fine and has poor fluidity, it is easy to adhere to the scraping workbench and needs to be cleaned with compressed air. Not only the operating environment is poor, but also the residual material collected in the dust extraction box is a mixture of coarse and fine materials, which cannot be recycled and used, so the molding material is wasted greatly. SUMMARY

[0006] The present application provides a precise double-sided oil stone multi-station automatic forming machine, adopts a rotary automatic mechanical equipment, a plurality of stations are arranged in a ring on the equipment, each station corresponds to a corresponding processing device, and each working procedure of the forming material can be sequentially processed to form an oil stone, the whole manufacturing process has high automation degree and high production efficiency, and the formed oil stone has good quality.

[0007] To achieve the above object, the technical scheme adopted by the present application is:

[0008] The precise double-sided oil stone multi-station automatic forming machine comprises a rotating device, the rotating device comprises a center column, a driving mechanism, a large turntable intermittently rotating on the center column, and an upper rack and a lower rack fixed on the center column and located on the upper and lower sides of the large turntable respectively.

[0009] The driving mechanism is in gear transmission with the large turntable, so as to drive the large turntable to rotate, a plurality of molds are arranged on the circumferential side of the large turntable, the molds can be conveniently carried and rotated together, the mold comprises a mold sleeve, a mold cover plate and a mold bottom plate, two mold cavities are formed in the mold sleeve, so as to form two oil stones at one time, and the mold cover plate and the mold bottom plate are embedded in each mold cavity in an upper and lower manner.

[0010] The mold cover plate and the mold bottom plate are in upper and lower cooperation and press the oil stone, so as to facilitate the forming of the oil stone, a circular slide is arranged on the lower rack for carrying and moving the mold, the bottom surface of the mold bottom plate contacts the slide, and the mold can be stably supported.

[0011] The rotating device circumferential side, clockwise, is sequentially provided with a bottom plate resetting device for resetting the mold bottom plate, a one-time weighing and feeding device for feeding the forming material into the mold cavity, a one-layer material flattening device for flattening the forming material in the mold cavity, a one-layer material scraping device for scraping the forming material in the mold cavity, a pre-pressing press for pre-pressing the forming material, a pre-pressing head cleaning device, a secondary weighing and feeding device, a two-layer material flattening device, a two-layer material scraping device, a final pressing press for final pressing the forming material, a final pressing head cleaning device and a bottom plate ejection device for ejecting the mold bottom plate.

[0012] Further, the driving mechanism is arranged below the large turntable, the driving mechanism comprises a motor, a speed reducer and an indexing head, the motor output shaft is connected with the speed reducer input shaft, the speed reducer output shaft is connected with the indexing head input shaft, the indexing head output shaft is in gear transmission with the large turntable, the transmission of the large turntable is realized, the indexing head facilitates the driving of the large turntable to carry the mold to rotate intermittently, the mold is circularly indexed at each working position, the large turntable center sleeve is arranged on the center column and a bearing is arranged therebetween, so as to ensure the smooth rotation of the large turntable.

[0013] The plurality of positioning blocks are arranged on the periphery of the large turntable, a positioning cylinder is arranged on the lower rack, a positioning pin is connected to the piston rod of the positioning cylinder, and the positioning pin is inserted into the positioning block for clamping and positioning, so that accurate positioning of the large turntable can be achieved.

[0014] Further, the bottom plate resetting device is arranged on the upper rack, and the bottom plate resetting device and the mold bottom plate are arranged in a one-to-one correspondence in the up-down direction. The bottom plate resetting device comprises a fixing frame, a bottom plate pressing cylinder, a guide frame, a lower sliding block, and a bottom plate pressing head.

[0015] The fixing frame is arranged on the upper rack, the bottom plate pressing cylinder is arranged above the fixing frame, the piston rod of the bottom plate pressing cylinder extends downward to connect the guide frame, the guide frame is vertically slidably arranged below the fixing frame, so that the guide frame can be driven to slide up and down along the fixing frame, the lower end of the guide frame extends out of the fixing frame to connect the lower sliding block, and the bottom plate pressing head is arranged on each side of the lower sliding block, and the two bottom plate pressing heads are respectively directed toward the two mold cavities, so that the two mold bottom plates can be pressed downward.

[0016] Further, the primary weighing and feeding device and the secondary weighing and feeding device are identical in structure and can both achieve the weighing and feeding of a fixed weight. The primary weighing and feeding device contains the formed coarse material, and the secondary weighing and feeding device contains the formed fine material.

[0017] The primary weighing and feeding device comprises a vertical seat, a weighing feeder with a hopper, a reversible weighing hopper, and a vibrating hopper. The weighing feeder, the weighing hopper, and the vibrating hopper are arranged in a stepped manner.

[0018] The vertical seat vertically extends above the large turntable. Two weighing feeders are arranged on one side above the vertical seat. The weighing feeders are one of a belt weighing feeder or a weighing vibrating feeder. The weighing hopper is arranged on the other side above the vertical seat. The weighing hopper is hingedly connected to the vertical seat. A turnover cylinder is further arranged between the weighing hopper and the vertical seat, so that the weighing hopper can be driven to be tilted to pour the formed material into the mold. A partition is arranged in the middle of the weighing hopper to divide the weighing hopper into two flow channels. The flow channels are respectively connected to the two weighing feeders.

[0019] The vibrating hopper comprises a vibrating plate with a vibrating motor and two hoppers arranged at one end of the vibrating plate. The vibrating plate is arranged on the upper rack. The vibrating motor realizes the vibration of the hoppers for discharging. The hoppers are in a one-to-one correspondence with the mold cavities in the up-down direction. The two hoppers are respectively connected to the two flow channels.

[0020] Further, the first layer material rake flattening device and the second layer material rake flattening device are identical in structure and are arranged on the upper rack in a one-to-one correspondence with the mold in the up-down direction. The first layer material rake flattening device and the second layer material rake flattening device both adopt a comb-shaped rake to insert the formed material into the material layer according to a specified depth and reciprocate, so as to ensure the uniform distribution of the formed material, facilitate the discharge of gas, and destroy the arching effect of fine powder, thereby ensuring the uniformity of the density of the formed green body.

[0021] The one-layer material scraping device comprises an upper support plate, a fixed column with a long slot, a lifting cylinder, a fixed height rod, a lifting carriage, an upper connecting plate, a horizontal cylinder, a combing tooth, a multi-position cylinder, a cylinder sliding block and a fixed height block;

[0022] The fixed column is vertically arranged on the upper side of the upper support plate, the long slot is vertically arranged in the fixed column, the lifting cylinder is arranged above the fixed column, the piston rod of the lifting cylinder extends downward into the long slot and is connected with the fixed height rod, the fixed height rod can move up and down along the long slot, the lifting carriage is in the shape of "N" and is arranged around the three sides of the fixed column and is connected with the upper connecting plate, the piston rod of the lifting cylinder is connected with the lifting carriage through the upper connecting plate, so as to drive the lifting carriage to move up and down, the horizontal cylinder is arranged below the lifting carriage, the horizontal cylinder is a horizontal moving rodless cylinder, two combing teeth are arranged side by side on the horizontal cylinder, so as to drive the combing teeth to move horizontally, the combing teeth are in the shape of comb teeth and move left and right along the length direction of the mold cavity;

[0023] The multi-position cylinder is horizontally arranged on the other side of the upper support plate, the piston rod of the multi-position cylinder is connected with the cylinder sliding block, the cylinder sliding block horizontally extends into the bottom of the long slot, a plurality of fixed height blocks are arranged above the cylinder sliding block, the fixed height blocks are in the form of bolt structure, the heights of the fixed height blocks are increased in sequence, the fixed height rod is sequentially arranged on the fixed height blocks, so as to control the moving height of the combing teeth and the depth of the combing teeth extending into the mold cavity.

[0024] Further, the one-layer material scraping device and the two-layer material scraping device have the same structure and are arranged on the upper rack corresponding to the mold; the scraping operation of the formed material is completed in the mold cavity to prevent the formed material from overflowing;

[0025] The one-layer material scraping device and the one-layer material scraping device have the same structure, two scraping plates are arranged side by side on the horizontal cylinder of the one-layer material scraping device, and the scraping plates are square plate bodies. The difference between the one-layer material scraping device and the one-layer material scraping device lies in that one uses a scraping plate and the other uses a combing tooth.

[0026] Further, the pre-pressing machine is a C-shaped single-arm hydraulic machine, and a mold cover plate is arranged on the pressure head of the pre-pressing machine; the pre-pressing machine is convenient for pre-pressing the scraped coarse material to ensure that the joint between the coarse material and the fine material is straight;

[0027] The final pressure press is a double-column hydraulic press, which can make the oil stone blank body form, and the final pressure press includes the center column, the side column, the upper hydraulic cylinder, the lower hydraulic cylinder and the movable cross beam, the center column and the side column are vertically arranged and parallel to each other, the upper hydraulic cylinder is arranged between the top of the center column and the top of the side column, and the lower hydraulic cylinder is arranged between the bottom of the center column and the bottom of the side column, and the piston rods of the upper hydraulic cylinder and the lower hydraulic cylinder are coaxially arranged vertically;

[0028] The piston rod of the upper hydraulic cylinder is connected with the movable cross beam, the movable cross beam is slidingly connected between the center column and the side column, the movable cross beam is controlled by the upper hydraulic cylinder, an upper pressing head with a mold cover plate is arranged below the movable cross beam, a lower pressing head is arranged on the piston rod of the lower hydraulic cylinder, the upper pressing head and the lower pressing head are vertically matched to press the oil stone, and the simultaneous pressurization of the upper hydraulic cylinder and the lower hydraulic cylinder can ensure that the density of the blank body is uniform in the thickness direction;

[0029] A displacement sensor is further arranged between the upper hydraulic cylinder and the lower hydraulic cylinder, which facilitates monitoring of the pressing stroke and improves the thickness accuracy of the blank body, the displacement sensor includes a grating ruler and a grating ruler detection slider slidingly connected to the grating ruler, the grating ruler is vertically arranged below the movable cross beam, and the grating ruler detection slider is arranged on the piston rod of the lower hydraulic cylinder;

[0030] The slide way is wound to the workbench of the pre-press and the final pressure press, and "L"-shaped work clamping plates for clamping the mold sleeve are arranged on both sides of the slide way corresponding to the workbench, so as to fix the mold sleeve during the operation of the pre-press and the final pressure press, and the lower pressing head of the piston rod of the lower hydraulic cylinder passes through the workbench of the final pressure press upward and abuts against the lower side of the mold bottom plate.

[0031] Further, a pre-press head cleaning device is arranged on one side of the pre-press, and a final pressure press head cleaning device is arranged on one side of the final pressure press, and the pre-press head cleaning device and the final pressure press head cleaning device are the same in structure;

[0032] The pre-press head cleaning device includes a fixed guide seat, a horizontal guide rod, a guide cylinder, a sliding seat plate, a bearing seat and a cleaning rubber roller and a material receiving box, the horizontal guide rod is slidingly connected in the fixed guide seat, the guide cylinder is horizontally arranged above the fixed guide seat, the piston rod of the guide cylinder is connected with the sliding seat plate, so as to facilitate the horizontal movement of the sliding seat plate, and one side of the sliding seat plate is connected with the horizontal guide rod, so as to provide guidance for the movement of the sliding seat plate;

[0033] The bearing seat is elastically connected to both sides above the sliding seat plate, the cleaning rubber roller is rotatably arranged between the bearing seats on both sides, so as to clean the excess material adhered to the pressing head, and the material receiving box is further arranged on the sliding seat plate below the cleaning rubber roller, and the cleaned excess material falls into the material receiving box.

[0034] Further, the bottom plate ejection device facilitates the ejection of the formed oilstone product from the mold, the manual removal of the oilstone and the application of a release agent in the mold cavity, the bottom plate ejection device is arranged on the lower frame, the mold bottom plate and the bottom plate ejection device are arranged in correspondence, the bottom plate ejection device comprises a mold stripping hydraulic cylinder, a sliding block guide rod, a mold stripping fixed plate, a mold stripping sliding block, an ejection block and a mold stripping clamping plate;

[0035] The mold stripping fixed plate is arranged above the mold stripping hydraulic cylinder in a spaced manner, the "L"-shaped mold stripping clamping plate for clamping the mold sleeve is arranged on both sides of the mold stripping fixed plate, the mold stripping hydraulic cylinder and the mold stripping fixed plate are connected and fixed through the sliding block guide rod, facilitating the relative fixation between the mold stripping hydraulic cylinder and the mold stripping fixed plate;

[0036] The mold stripping sliding block is slidably connected to the sliding block guide rod, the piston rod of the mold stripping hydraulic cylinder is connected to the mold stripping sliding block, facilitating the up-and-down movement of the mold stripping sliding block, the ejection block is arranged on both sides of the mold stripping sliding block, the ejection block passes through the mold stripping fixed plate upwards and abuts against the mold bottom plate, the magnets are arranged on both sides of the ejection block, facilitating the adsorption of the mold bottom plate and assisting the resetting of the mold bottom plate.

[0037] Through the above technical scheme, the application has the following beneficial effects:

[0038] The application has a compact structure, each device is arranged around the rotating device, i.e., each station is formed, the overall layout is reasonable, a good operating environment can be provided for the operator, the circulation and mechanization of the oilstone manufacturing are ensured, the product manufacturing quality and efficiency can be improved, the intermittent rotating movement of the large turntable is driven by the driving mechanism, each mold is cyclically sent to the corresponding station and is accurately positioned by the positioning mechanism, the mold positioning is accurate and reliable, the oilstone in each mold is formed once the mold moves.

[0039] The operation flow of the present application is as follows: 1, bottom plate resetting device: make the mold bottom plate close to the slide, ensure the mold bottom plate in the reference position when scraping; 2, first weighing and feeding device: weigh the first material according to the process formula and feed the material into the mold cavity; 3, first layer material spreading device: spread the first forming material in the mold cavity and exhaust; 4, first layer material scraping device: scrape the surface of the first material; 5, pre-pressing press: pre-form the first material to ensure the clear product boundary; 6, pre-pressing head cleaning device: remove the excess material on the pre-pressing press head; 7, second weighing and feeding device: weigh the second material according to the process formula and feed the material into the mold cavity; 8, second layer material spreading device: spread the second forming material in the mold cavity and exhaust; 9, second layer material scraping device: scrape the surface of the second material; 10, final pressing press: double-sided press the scraped forming material in the mold cavity to the required size; 11, final pressing head cleaning device: remove the excess material on the final pressing press head; 12, bottom plate ejection device: eject the formed product from the mold cavity and manually clean the mold cavity.

[0040] The first weighing and feeding device and the second weighing and feeding device are automatic weighing and feeding equipment, which can conveniently feed the forming material into the mold, reduce the number of operators, and also ensure the accuracy of the product weight. The first layer material spreading device, the second layer material spreading device, the first layer material scraping device, and the second layer material scraping device are horizontally reciprocated on one side and slightly lifted on the other side, so that the forming material is uniformly distributed in the mold cavity, the forming material arch is broken, and the internal air is discharged. The oilstone blank is pre-formed and finally formed, which ensures that part of the interface in the oilstone product is flat and clear. When the final pressing press is running, a proportional speed control overflow valve is used for control, and a grating ruler is used for stroke monitoring, which can conveniently realize the fixed thickness forming of the oilstone and ensure the accuracy of the product thickness size. The formed oilstone can be automatically ejected by the bottom plate ejection device, manually taken out, and the mold bottom plate is reset by the bottom plate resetting device after being ejected, which is convenient for starting the next cycle operation. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is a top view of the present application precision double-sided oilstone multi-station automatic forming machine.

[0042] Figure 2 is a slide top view of the present application precision double-sided oilstone multi-station automatic forming machine.

[0043] Figure 3 is a large turntable and mold installation schematic diagram of the present application precision double-sided oilstone multi-station automatic forming machine.

[0044] Figure 4 is a mold top view of the present application precision double-sided oilstone multi-station automatic forming machine.

[0045] Figure 5 is aFigure 4 Middle mold A-A view.

[0046] Figure 6 Is the precision double-sided oilstone multi-station automatic forming machine of the invention Figure 4 Middle mold B-B view.

[0047] Figure 7 Is the bottom plate reset device schematic diagram of the precision double-sided oilstone multi-station automatic forming machine of the invention.

[0048] Figure 8 Is the one-time weighing and feeding device schematic diagram of the precision double-sided oilstone multi-station automatic forming machine of the invention.

[0049] Figure 9 Is the one layer material flat device front view of the precision double-sided oilstone multi-station automatic forming machine of the invention.

[0050] Figure 10 Is the one layer material flat device side view of the precision double-sided oilstone multi-station automatic forming machine of the invention.

[0051] Figure 11 Is the one layer material flat device side view of the precision double-sided oilstone multi-station automatic forming machine of the invention.

[0052] Figure 12 Is the one layer material flat device side view of the precision double-sided oilstone multi-station automatic forming machine of the invention.

[0053] Figure 13 Is the pre-pressing press schematic diagram of the precision double-sided oilstone multi-station automatic forming machine of the invention.

[0054] Figure 14 Is the pre-pressing press schematic diagram of the precision double-sided oilstone multi-station automatic forming machine of the invention.

[0055] Figure 15 Is the pre-pressing press schematic diagram of the precision double-sided oilstone multi-station automatic forming machine of the invention.

[0056] Figure 16 Is the final pressing press schematic diagram of the precision double-sided oilstone multi-station automatic forming machine of the invention.

[0057] Figure 17 Is the displacement sensor schematic diagram of the precision double-sided oilstone multi-station automatic forming machine of the invention.

[0058] Figure 18 Is the bottom plate ejection device front view of the precision double-sided oilstone multi-station automatic forming machine of the invention.

[0059] Figure 19 Is the bottom plate ejection device front view of the precision double-sided oilstone multi-station automatic forming machine of the invention.

[0060] The attached diagram is labeled as follows: 1. Center column; 2. Drive mechanism; 201. Motor; 202. Reducer; 203. Indexing head; 204. Gear pair; 3. Turntable; 4. Positioning block; 5. Positioning mechanism; 6. Mold; 61. Mold sleeve; 611. Mold side plate; 612. Mold end plate; 62. Mold cover plate; 63. Mold base plate; 64. Mold cavity; 7. Adapter seat; 8. Slot; 9. Slide rail; 10. Base plate reset device; 11. Fixing bracket; 111. Flange plate; 112. Fixing guide rod; 12. Pressure plate air. 13. Cylinder, 14. Guide frame, 15. Lower slide block, 16. Base plate pressure head, 17. Primary weighing and feeding device, 18. Stand, 19. Weighing feeder, 20. Bucket, 21. Vibrating funnel, 22. Vibrating motor, 23. Vibrating plate, 24. Funnel, 25. Hinge point A, 26. Tilting cylinder, 27. Oilstone, 28. Layer material leveling device, 29. Upper support plate, 30. Long trough, 31. Fixed column, 32. Lifting cylinder, 33. Height-fixing rod, 34. Lifting slide, 35. Upper connecting plate, 36. Horizontal Cylinder, 36 Comb teeth, 37 Micro-lift multi-position cylinder, 38 Cylinder slider, 39 Height-fixing block, 40 First-layer material leveling device, 41 Scraper, 42 Pre-press, 43 Working buckle plate, 44 Pre-press head cleaning device, 45 Fixed guide seat, 46 Horizontal guide rod, 47 Guide cylinder, 48 Slide plate, 49 Bearing seat, 50 Cleaning rubber roller, 51 Receiving box, 52 Floating rod, 53 Compression spring, 54 Secondary weighing and feeding device, 55 Second-layer material leveling device 56. Second-layer material leveling device; 57. Final pressing press; 58. Side column; 59. Upper hydraulic cylinder; 60. Lower hydraulic cylinder; 601. Movable crossbeam; 602. Upper pressing head; 603. Lower pressing head; 604. Displacement sensor; 641. Grating ruler; 642. Grating ruler detection slider; 65. Final pressing head cleaning device; 66. Bottom plate ejection device; 67. Demolding hydraulic cylinder; 68. Slider guide rod; 69. Demolding fixing plate; 70. Demolding slider; 71. Ejection block; 72. Demolding buckle plate; 73. Magnet. Detailed Implementation

[0061] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings:

[0062] like Figures 1 to 19 As shown, the precision double-sided oilstone multi-station automatic forming machine includes a rotary device, which includes a central column 1, a drive mechanism 2, a large turntable 3 intermittently rotated on the central column 1, and an upper frame and a lower frame fixed to the central column 1 and located on the upper and lower sides of the large turntable 3, respectively. The upper frame and the lower frame are not shown in the figure.

[0063] The driving mechanism 2 is arranged below the large turntable 3, and the driving mechanism 2 is in gear transmission with the large turntable 3, so as to drive the large turntable 3 to rotate circumferentially. The driving mechanism 2 comprises a motor 201, a speed reducer 202 and an indexing head 203. The motor 201 is a variable frequency speed regulation motor 201. The output shaft of the motor 201 is connected with the input shaft of the speed reducer 202. The output shaft of the speed reducer 202 is connected with the input shaft of the indexing head 203. The output shaft of the indexing head 203 is in gear transmission with the large turntable 3. The indexing head 203 adopts a spiral cam intermittent mechanism. The large turntable 3 is sleeved on the center column 1, and bearings are arranged between the large turntable 3 and the center column 1. Thus, the large turntable 3 can be driven to rotate intermittently by the motor 201 under the transmission of the speed reducer 202, the indexing head 203 and the gear pair 204, as shown in Figure 2 and Figure 3 .

[0064] In order to realize the positioning of the rotation of the large turntable 3, a plurality of positioning blocks 4 are arranged on the circumferential side of the large turntable 3. A positioning cylinder is further arranged on the lower rack. A positioning pin is connected to the piston rod of the positioning cylinder, so as to drive the positioning pin to move horizontally. Herein, the positioning cylinder and the positioning pin controlled by the positioning cylinder are collectively referred to as a positioning mechanism 5. When the positioning pin extends into the positioning block 4 to realize the clamping positioning of the large turntable 3, the large turntable 3 cannot rotate. When the positioning pin moves out of the positioning block 4, the large turntable 3 is no longer limited, and the large turntable 3 can continue to rotate.

[0065] A plurality of molds 6 are arranged on the circumferential side of the large turntable 3. The molds 6 are used for the molding of the oilstone 26. Under the driving of the large turntable 3, the molds 6 rotate circumferentially around the center column 1 together with the large turntable 3. The plurality of molds 6 are located at the same circumferential position.

[0066] When the mold 6 is installed with the large turntable 3, a circular mold hole is formed on the circumferential side of the large turntable 3. A conversion seat 7 is bolted in the mold hole. The conversion seat 7 realizes the conversion function. The outer wall of the conversion seat 7 is circular and matches the mold hole. The inner part of the conversion seat 7 is a rectangular hole, which is used for matching the mold 6. The conversion seat 7 is embedded with the mold 6.

[0067] As shown in Figures 4 to 6 , the mold 6 comprises a mold sleeve 61, a mold cover plate 62 and a mold bottom plate 63. The mold sleeve 61 is a split structure. The mold sleeve 61 comprises two mold end plates 612 arranged symmetrically left and right and three mold side plates 611 bolted between the two mold end plates 612. The mold end plate 612 is vertically arranged. The outer wall of the mold end plate 612 is provided with a clamping groove 8, which is used for matching other components to temporarily fix the whole mold sleeve 61. The three mold side plates 611 are arranged in parallel in the horizontal direction.

[0068] Two cavities 64 are formed in the die sleeve 61, i.e. two cavities 64 are formed between the two die end plates 612 and the three die side plates 611, each cavity 64 is rectangular, the cavities 64 are used to hold the oil stone 26 forming material, one set of die 6 can form two oil stone 26 products at a time. The die cover plate 62 and the die bottom plate 63 are embedded in the cavities 64, the die cover plate 62 and the die bottom plate 63 are rectangular, the die cover plate 62, the die bottom plate 63 and the cavities 64 are gap fitted, there is a gap between the die cover plate 62 and the die bottom plate 63, which is used to accommodate the oil stone 26 forming material, the die cover plate 62 and the die bottom plate 63 are fitted and pressed tightly from top to bottom.

[0069] When the die 6 rotates with the large turntable 3, only the die sleeve 61 and the die bottom plate 63 are combined together and installed on the large turntable 3, at this time the die bottom plate 63 and the lower surface of the die sleeve 61 are flush, and the cavities 64 are exposed. The die cover plate 62 is installed on the subsequent press, and the die cover plate 62 is driven by the press to press into the cavities 64 and cooperate with the die bottom plate 63 to press and form the oil stone 26 forming material in the cavities 64.

[0070] To avoid the suspension of the die 6, a circular slide 9 is arranged on the lower rack to carry the movement of the die 6, and the bottom surface of the die bottom plate 63 always contacts the slide 9. Since the movement track of the die 6 is a circle, the slide 9 is also a circle, which ensures that the die 6 can be supported by the slide 9 when moving, as shown in Figure 2 .

[0071] While the large turntable 3 drives the die 6 to rotate circumferentially, to realize the forming of the oil stone 26, a bottom plate resetting device 10 for resetting the die bottom plate 63, a primary weighing and feeding device 16 for feeding the forming material into the cavities 64, a first layer material flattening device 27 for flattening the forming material in the cavities 64, a first layer material scraping device 40 for scraping the forming material in the cavities 64, a pre-pressing press 42 for pre-pressing the forming material, a pre-pressing head cleaning device 44, a secondary weighing and feeding device 54, a second layer material flattening device 55, a second layer material scraping device 56, a final pressing press 57 for final pressing the forming material, a final pressing head cleaning device 65 and a bottom plate ejection device 66 for ejecting the die bottom plate 63 are arranged in sequence on the side of the rotating device clockwise, as shown in Figure 1 .

[0072] From the above, the process flow of oilstone 26 forming is: 1, the reset of the mold base plate 63 by the base plate reset device 10; 2, the oilstone 26 forming material is put into the mold cavity 64 by the first weighing feeding device 16; 3, the forming material in the mold cavity 64 is leveled by the first layer of material leveling device 27; 4, the forming material in the mold cavity 64 is scraped by the first layer of material scraping device 40; 5, the forming material in the mold cavity 64 is pre-pressed by the pre-pressing machine 42; 6, after the pre-pressing machine 42 runs, the pre-pressing head cleaning device 44 immediately cleans the pre-pressing head of the pre-pressing machine 42; 7, the forming material is again put into the mold cavity 64 by the second weighing feeding device 54; 8, the again put forming material is leveled by the second layer of material leveling device 55; 9, the again put forming material is scraped by the second layer of material scraping device 56; 10, the forming material is finally pressed by the final pressing machine 57 to form the oilstone 26; 11, after the final pressing machine 57 runs, the final pressing head cleaning device 65 immediately cleans the final pressing head of the final pressing machine 57; 12, the mold base plate 63 is ejected from the mold cavity 64 by the base plate ejecting device 66, and the formed oilstone 26 is taken out manually.

[0073] The above-mentioned twelve devices are equivalent to twelve stations. Based on the fixed position of the twelve devices, when the large turntable 3 performs intermittent rotary motion, it drives the mold 6 to be circulated into the corresponding station and sequentially passes through the twelve devices to complete the forming of the oilstone 26. The large turntable 3 continuously drives the mold 6 to rotate, and at the same time, the large turntable 3 is accurately positioned by the positioning mechanism 5 to ensure that the mold 6 moves accurately and reliably. This constitutes a mechanized production line, which can efficiently and high-quality manufacture oilstones 26.

[0074] The base plate reset device 10 is based on the ejection of the mold base plate 63. After the mold base plate 63 is ejected by the base plate ejecting device 66, the use of the current mold 6 is completed. In order to use the mold 6 again and make it can accommodate the forming material, the mold base plate 63 needs to be reset and moved downward to ensure that its lower surface is consistent with the lower surface of the mold sleeve 61.

[0075] The base plate reset device 10 is arranged on the upper rack, and the base plate reset device 10 and the mold base plate 63 are arranged in correspondence with each other. Therefore, the operation of the base plate reset device 10 can act on the mold base plate 63. The base plate reset device 10 includes a fixed frame 11, a base plate cylinder 12, a guide frame 13, a lower sliding block 14, and a base plate pressing head 15, as shown in Figure 7 .

[0076] The base plate reset device 10 is arranged on the upper rack through the fixed frame 11. The fixed frame 11 is a "mouth" shaped frame, and the fixed frame 11 includes two flange plates 111 and two fixed guide rods 112. The flange plate 111 and the fixed guide rod 112 are connected and combined to form a "mouth" shaped cross section.

[0077] The fixed frame 11 is provided with a bottom plate pressing cylinder 12 above the fixed frame 11, the bottom plate pressing cylinder 12 is vertically arranged, the piston rod of the bottom plate pressing cylinder 12 extends downward to connect a guide frame 13, the guide frame 13 is vertically slidably connected to the fixed frame 11, and the guide frame 13 is driven by the bottom plate pressing cylinder 12 to slide up and down along the fixed frame 11. The guide frame 13 is in the shape of a “∏”, both ends of the guide frame 13 are sleeved on a fixed guide rod 112 above the guide frame 13, and the guide frame 13 is slidably connected to the fixed frame 11 through a linear bearing below the guide frame 13.

[0078] The lower end of the guide frame 13 extends out of the fixed frame 11 to be connected to a lower sliding block 14, bottom plate pressing heads 15 are arranged on both sides of the lower sliding block 14, the number of the bottom plate pressing heads 15 is two, and the two bottom plate pressing heads 15 on the two sides are respectively directed to the two mold cavities 64, so that the two mold cavities 64 can be simultaneously pressed.

[0079] The principle of the bottom plate resetting device 10 is as follows: when the mold 6 is moved to below the bottom plate resetting device 10 by the large turntable 3 and stops, the bottom plate pressing cylinder 12 is started to drive the guide frame 13 and the two bottom plate pressing heads 15 to move downward together, so that the two mold bottom plates 63 that are pushed out are pressed downward and pushed downward, until the mold bottom plates 63 contact the slide 9, and then the bottom plate pressing cylinder 12 drives the bottom plate pressing heads 15 to move upward to reset. In order to ensure the accuracy of the downward movement of the mold bottom plates 63, upper and lower magnetic switches are further arranged at both ends of the cylinder body of the bottom plate pressing cylinder 12, and are used for monitoring the running stroke of the bottom plate pressing cylinder 12.

[0080] After the mold bottom plates 63 are reset, the oil stone 26 forming material is quantitatively added into the mold cavities 64 through the one-time weighing feeding device 16. The one-time weighing feeding device 16 comprises a vertical seat 17, a weighing feeder 18 with a hopper, a turnable weighing hopper 19 and a vibrating hopper 20, the weighing feeder 18, the weighing hopper 19 and the vibrating hopper 20 are arranged in a stepped manner, as shown in Figure 8 .

[0081] The vertical seat 17 vertically extends upward beyond the large turntable 3, two weighing feeders 18 are arranged on one side above the vertical seat 17, the weighing feeders 18 are one of belt weighing feeders 18 or weighing vibrating feeders, and the belt weighing feeders 18 are adopted herein. The oil stone 26 forming material is stored in the hopper, and a spiral feeder is arranged in the hopper to downwardly convey the forming material to the belt of the weighing feeder 18 to complete the quantitative forming material.

[0082] The weighing hopper 19 is arranged on the other side above the vertical seat 17, the weighing hopper 19 is open above, the weighing hopper 19 and the vertical seat 17 are hingedly connected to form a hinge point A24, and a turning cylinder 25 is further hingedly connected between the weighing hopper 19 and the vertical seat 17. The forming material weighed by the weighing feeder 18 is conveyed into the weighing hopper 19, the weighing hopper 19 is turned about the hinge point A24 as a turning center, and the weighing hopper 19 is tilted by the turning cylinder 25.

[0083] Since there are two cavities 64 in the mold 6, two weighing feeders 18 are arranged, and a partition is arranged in the middle of the weighing bucket 19 to separate the weighing bucket 19 into two flow channels, the two flow channels are the same structure, and the flow channels are respectively communicated with the two weighing feeders 18, that is, the weighing feeder 18 and the flow channel are communicated one by one. The end of the flow channel close to the weighing feeder 18 is closed, and the end of the flow channel close to the vibrating hopper 20 is open, so that the molding material in the flow channel can be poured into the vibrating hopper 20.

[0084] The vibrating hopper 20 includes a vibrating plate 22 with a vibrating motor 21 and two hoppers 23 arranged at one end of the vibrating plate 22. The vibrating plate 22 is horizontally arranged on the upper rack, and the hopper 23 is an inverted hollow quadrangular prism structure. The hopper 23 and the cavity 64 correspond one by one. The two hoppers 23 are correspondingly communicated above the two flow channels, that is, the weighing feeder 18, the weighing bucket 19 and the hopper 23 are sequentially communicated.

[0085] The principle of the one-time weighing feeding device 16 is: when the mold 6 is moved to the one-time weighing feeding device 16 by the large turntable 3, the two weighing feeders 18 are started at the same time, and the molding material is quantitatively added to the two flow channels in the weighing bucket 19, and the weighing feeder 18 stops after adding to the required capacity; the overturning cylinder 25 is operated to drive the weighing bucket 19 to overturn, so that the molding material in the weighing bucket 19 is poured into the hopper 23. At the same time, the vibrating motor 21 on the vibrating plate 22 is started to drive the hopper 23 to vibrate, so that the molding material passing through the hopper 23 is vibrated and dispersed, and the molding material after vibration and dispersion flows into the cavity 64.

[0086] After the molding material is added into the cavity 64, the molding material is uniformly spread by a layer of material spreader 27. The layer of material spreader 27 is arranged on the upper rack corresponding to the mold 6, and the layer of material spreader 27 includes an upper support plate 28, a fixed column 30 with a long slot 29, a lifting cylinder 31, a fixed height rod 32, a lifting carriage 33, an upper connecting plate 34, a horizontal cylinder 35, a combing tooth 36, a micro lifting multi-position cylinder 37, a cylinder sliding block 38 and a fixed height block 39, as shown in Figure 9 and Figure 10 .

[0087] The layer of material spreader 27 is connected with the upper rack through the upper support plate 28, and the fixed column 30 is vertically arranged on one side of the upper support plate 28. The long slot 29 is vertically arranged in the fixed column 30, and the long slot 29 penetrates through the fixed column 30. The fixed column 30 is fixed. The lifting cylinder 31 is arranged above the fixed column 30, and the lifting cylinder 31 is vertically arranged. The piston rod of the lifting cylinder 31 extends downward into the long slot 29 and is connected with the fixed height rod 32. The lifting cylinder 31 can drive the fixed height rod 32 to move up and down in the long slot 29, and the long slot 29 provides a movement space for the piston rod of the lifting cylinder 31. Linear guides are arranged on both sides of the fixed column 30.

[0088] The lifting carriage 33 is in the shape of a "N" and is arranged around the three sides of the fixed column 30 and is connected to the fixed column 30 in a sliding manner. The lifting carriage 33 is provided with sliding blocks on both sides to cooperate with the linear guide rails, so that the lifting carriage 33 can slide along the fixed column 30. The piston rod of the lifting cylinder 31 is connected to the lifting carriage 33 through the upper connecting plate 34. The upper connecting plate 34 is arranged horizontally. The middle part of the upper connecting plate 34 is connected to the piston rod. The two ends of the upper connecting plate 34 are connected to the two ends of the lifting carriage 33. The upper connecting plate 34 and the lifting carriage 33 are connected in combination and are in the shape of a "KU" in cross section. Therefore, the lifting cylinder 31 can move together with the fixed height rod 32 and the lifting carriage 33.

[0089] The horizontal cylinder 35 is arranged below the lifting carriage 33. The horizontal cylinder 35 is a horizontal moving rodless cylinder. The horizontal cylinder 35 is provided with two comb teeth 36 arranged side by side. The two comb teeth 36 can correspond to the two mold cavities 64. The comb teeth 36 are in the shape of a comb. The horizontal cylinder 35 drives the comb teeth 36 to move horizontally and reciprocally, so that the formed material in the mold cavity 64 can be uniformly spread.

[0090] In order to realize the uniform layer-by-layer spreading of the formed material, the micro-lifting multi-position cylinder 37 is arranged horizontally on the other side of the upper supporting plate 28. The piston rod of the micro-lifting multi-position cylinder 37 is connected to the cylinder sliding block 38, so that the cylinder sliding block 38 can be driven to move horizontally. The cylinder sliding block 38 horizontally extends into the bottom of the long groove 29. Therefore, the cylinder sliding block 38 can penetrate through the fixed column 30.

[0091] The four fixed height blocks 39 are arranged in a spaced manner above the cylinder sliding block 38. The fixed height blocks 39 are in the form of a bolt structure. The fixed height blocks 39 are vertically connected to the cylinder sliding block 38 in a threaded manner. Each fixed height block 39 is provided with a nut. After the nut is tightened, the nut abuts against the upper surface of the cylinder sliding block 38, so that the fixed height blocks 39 are fixed. The heights of the plurality of fixed height blocks 39 are sequentially increased. The height difference between the two adjacent fixed height blocks 39 is 0.2-0.6 mm. The fixed height rod 32 sequentially abuts against the plurality of fixed height blocks 39. The micro-lifting multi-position cylinder 37 can sequentially send the four fixed height blocks 39 to the coaxial position of the fixed height rod 32. Through the cooperation of the fixed height blocks 39 and the fixed height rod 32, the comb teeth 36 can be lifted step by step, so that the layer-by-layer spreading of the material can be realized.

[0092] The principle of the one-layer material spreading device 27 is as follows: initial position: the lifting cylinder 31 is retracted. The lifting carriage 33, the fixed height rod 32 and the horizontal cylinder 35 are in the upper limit position. At this time, one side surface of the comb teeth 36 is flush with one end surface of the mold cavity 64 in the length direction. The fixed height block 39 with the lowest height is in the coaxial position below the fixed height rod 32.

[0093] When the carousel 3 drives the mold 6 to move to the position below the material scraping device 27, the piston rod of the lifting cylinder 31 is extended to drive the height fixing rod 32 to contact the lowest height fixing block 39 and then stop. At this time, the combing tooth 36 is in close contact with one end surface of the mold cavity 64 and penetrates into the material surface. The horizontal cylinder 35 moves to drive the combing tooth 36 to push the surface material layer to the other end surface of the mold cavity 64 until the combing tooth 36 contacts the other end surface and stops, thus forming a first material scraping track, as shown in FIG. 2A. Figure 11

[0094] The piston rod of the lifting cylinder 31 is retracted to drive the combing tooth 36 to move upward. The multi-position cylinder is operated to extend to send the lower height fixing block 39 to the position below the height fixing rod 32. Then, the lifting cylinder 31 drives the height fixing rod 32 to move downward to contact the lower height fixing block 39. Since the heights of the two height fixing blocks 39 before and after are different, the height of the combing tooth 36 has been slightly increased according to the height of the lower height fixing block 39. At this time, the combing tooth 36 is in close contact with the other end surface of the mold cavity 64 and penetrates into the material surface. The horizontal cylinder 35 is operated to drive the combing tooth 36 to move horizontally in the opposite direction of the first scraping, so as to complete the second scraping of the combing tooth 36 in the same way as the first scraping, thus forming a second material scraping track, as shown in FIG. 2B. Figure 11

[0095] According to the above manner, the multi-position cylinder 37 sends the two height fixing blocks 39 with higher and highest heights to the positions below the height fixing rod 32 in sequence, so that the combing tooth 36 completes the third and fourth scrapings at different heights, respectively, so that the remaining material in front of the combing tooth 36 becomes less and less until it is scraped flat. The third and fourth scraping tracks are shown in FIGS. 2C and 2D. The whole material scraping process is that the combing tooth 36 moves horizontally and reciprocally while being vertically lifted, so that the formed material is uniformly distributed along the mold cavity 64 and the bridging of the formed material is destroyed and the air inside the formed material is removed. Figure 11

[0096] After the formed material is scraped flat, the formed material needs to be scraped flat again by a material scraping device 40. The material scraping device 40 is arranged on the upper rack and corresponds to the mold 6 in a one-to-one manner. In this embodiment, the material scraping device 40 and the material scraping device 27 have the same structure and the same operating principle, as shown in FIG. 3. Figure 12 The difference is that the two scraping plates 41 are arranged side by side on the horizontal cylinder 35 of the material scraping device 40. The scraping plate 41 is a square plate body, that is, the combing tooth 36 is replaced by the scraping plate 41, and the rest remains unchanged, thus constituting the material scraping device 40. Through the material scraping device 40, the formed material can be scraped flat four times layer by layer.

[0097] ​​​After the molding material is scraped flat, the pre-pressing press 42 is used to pre-press the molding material. The pre-pressing press 42 is a C-shaped single-arm hydraulic press with a nominal pressure of 1000KN. A die cover plate 62 is arranged on the pressure head of the pre-pressing press 42. The die cover plate 62 is driven by the piston rod of the pre-pressing press 42 to move up and down. As shown in Figure 13 .

[0098] The principle of the pre-pressing press 42 is that when the large turntable 3 drives the mold 6 to stop on the workbench below the pre-pressing press 42, the pre-pressing press 42 is operated to drive the die cover plate 62 to move downward into the mold cavity 64 to press the molding material at a low pressure. In other words, the die cover plate 62 and the die bottom plate 63 cooperate to extrude the molding material to form the molding material, so as to ensure that the material surface is flat.

[0099] The slide 9 is wound to the workbench of the pre-pressing press 42 to ensure that the mold 6 is supported by the workbench. In order to ensure that the mold 6 is fixed when the pre-pressing press 42 is operated, the slide 9 corresponding to the workbench is provided with “L”-shaped working buckle plates 43 for clamping the die sleeve 61. The working buckle plates 43 are horizontally bent above the clamping groove 8 outside the die sleeve 61. The positions of the working buckle plates 43 are fixed. When the mold 6 is driven by the large turntable 3 to the workbench of the pre-pressing press 42, the mold 6 automatically enters between the two working buckle plates 43 to realize the positioning of the die sleeve 61 and prevent the die sleeve 61 from moving upward.

[0100] A compressed air nozzle and a dust collection cover can also be arranged on the workbench of the pre-pressing press 42. The nozzle faces the mold cavity 64 and can blow away the floating material on the surface of the primary molding body. At the same time, the dust collection cover can collect the blown powder.

[0101] After the pre-pressing press 42 is operated once, the pre-pressing head cleaning device 44 is needed to clean the die cover plate 62 on the pressure head to prevent the die cover plate 62 from sticking to the material and to prepare for the next pre-pressing. The pre-pressing head cleaning device 44 is horizontally arranged on one side of the pre-pressing press 42. The position of the pre-pressing head cleaning device 44 is fixed. The pre-pressing head cleaning device 44 includes a fixed guide seat 45, a horizontal guide rod 46, a guide cylinder 47, a sliding seat plate 48, a bearing seat 49, a cleaning rubber roller 50, and a material receiving box 51, as shown in Figure 14 and Figure 15 .

[0102] Two horizontal guide rods 46 are horizontally slidably connected in the fixed guide seat 45. The guide cylinder 47 is horizontally arranged above the fixed guide seat 45. The piston rod of the guide cylinder 47 is connected with the sliding seat plate 48. One side of the sliding seat plate 48 is connected with the horizontal guide rod 46. The sliding seat plate 48 can be driven by the guide cylinder 47 to move. The horizontal guide rod 46 provides horizontal guidance for the movement of the sliding seat plate 48.

[0103] The bearing seat 49 is elastically connected to the slide plate 48. Specifically, a floating rod 52 in the shape of "T" is vertically arranged on both sides of the slide plate 48, a linear bearing is slidably connected to the floating rod 52, the linear bearing is connected with the bearing seat 49 and moves together, and a compression spring 53 is sleeved on the floating rod 52 between the linear bearing and the slide plate 48, so that the bearing seat 49 can elastically slide up and down along the floating rod 52.

[0104] The cleaning rubber roller 50 is rotatably arranged between the bearing seats 49 on both sides, and can clean the formed material adhered to the mold cover plate 62. The cleaning rubber roller 50 is floatingly connected to the slide plate 48, and is used to compensate the error of the stop position of the pre-pressing press 42, so that the cleaning rubber roller 50 always contacts the press head and has a certain pressure with the working surface of the press head. The slide plate 48 below the cleaning rubber roller 50 is also provided with a material receiving box 51 in the shape of a hollow inverted trapezoid with an open upper end, and the cleaned formed material falls into the material receiving box 51.

[0105] The principle of the pre-pressing press cleaning device 44 is that after the pre-pressing press 42 operates once, the press head is reset, the guide cylinder 47 is extended to drive the entire slide plate 48 to move to the mold cover plate 62 of the press head, so that the cleaning rubber roller 50 closely contacts the bottom surface of the mold cover plate 62 to clean the residual material adhered to the surface of the mold cover plate 62 and make it fall into the material receiving box 51. Then, the guide cylinder 47 is retracted to make the cleaning rubber roller 50 away from the press head, and the cleaning of the press head of the pre-pressing press 42 is completed.

[0106] After the formed material is pre-pressed, the secondary weighing and feeding device 54 is used to feed the formed material into the mold cavity 64 again. The secondary weighing and feeding device 54 has the same structure and principle as the primary weighing and feeding device 16, but is installed at a different position, which will not be described herein.

[0107] After the secondary feeding, the formed material needs to be flattened by the second layer material flattening device 55. The second layer material flattening device 55 has the same structure and principle as the first layer material flattening device 27, but is installed at a different position, which will not be described herein.

[0108] After the secondary formed material is flattened, the second layer material scraping device 56 is used to scrape the secondary formed material. The second layer material scraping device 56 has the same structure and principle as the first layer material scraping device 40, but is installed at a different position, which will not be described herein.

[0109] After the secondary formed material is scraped, the final press 57 is used to press the secondary formed material together with the primary formed material which has been pre-pressed into an integral whole. The final press 57 is a double-column hydraulic press with a nominal pressure of 1500KN. The final press 57 includes a center column 1, a side column 58, an upper hydraulic cylinder 59, a lower hydraulic cylinder 60 and a movable cross beam 601.

[0110] The center column 1 is part of the rotary device and part of the final pressing machine 57, and the center column 1 and the side column 58 are vertically arranged and parallel to each other. An upper hydraulic cylinder 59 is arranged between the top of the center column 1 and the side column 58, and a lower hydraulic cylinder 60 is arranged between the bottom of the center column 1 and the side column 58. The piston rods of the upper hydraulic cylinder 59 and the lower hydraulic cylinder 60 are coaxially arranged. The upper hydraulic cylinder 59 and the lower hydraulic cylinder 60 are controlled by proportional speed regulating overflow valves to ensure accurate pressure and stroke, thereby ensuring the thickness accuracy of the oilstone 26 blank.

[0111] The piston rod of the upper hydraulic cylinder 59 is connected with a movable cross beam 601, and the movable cross beam 601 is slidingly connected between the center column 1 and the side column 58. The movable cross beam 601 can be driven by the upper hydraulic cylinder 59 to slide up and down. An upper pressing head 602 with a mold cover plate 62 is arranged below the movable cross beam 601, and the upper pressing head 602 cooperates with a mold bottom plate 63 to press the formed material. A lower pressing head 603 is arranged on the piston rod of the lower hydraulic cylinder 60, and the upper pressing head 602 and the lower pressing head 603 press the oilstone 26 in cooperation.

[0112] The slide 9 is wound to the workbench of the final pressing machine 57 to ensure that the mold 6 is supported by the workbench. The workbench of the final pressing machine 57 is covered on the lower hydraulic cylinder 60 and is hollowed out corresponding to the position of the lower pressing head 603, so that the lower hydraulic cylinder 60 can drive the lower pressing head 603 to move upward. That is, the lower pressing head 603 on the piston rod of the lower hydraulic cylinder 60 passes through the workbench of the final pressing machine 57 upward and abuts against the mold bottom plate 63 below.

[0113] In order to ensure the fixation of the mold 6 during the operation of the final pressing machine 57, the slide 9 corresponding to the workbench is also provided with a working buckle plate 43. The working buckle plate 43 has the same structure and function as the working buckle plate 43 on the workbench of the pre-pressing machine 42, and details are not repeated here.

[0114] The principle of the final pressing machine 57 is as follows: when the large turntable 3 drives the mold 6 to move to the workbench below the final pressing machine 57 and stops, the mold sleeve 61 is fixed by the working buckle plate 43. The upper hydraulic cylinder 59 drives the movable cross beam 601 and the upper pressing head 602 to move downward. The upper pressing head 602 is equivalent to the mold cover plate 62. After the upper pressing head 602 contacts the formed material and forms a certain pressure, the lower hydraulic cylinder 60 drives the lower pressing head 603 to start upward operation and pushes the mold bottom plate 63 to move upward to press the formed material from both sides.

[0115] The pressing stroke is controlled by a displacement sensor 604, thereby ensuring the thickness accuracy of the oilstone 26 blank. After the pressing is completed, the lower hydraulic cylinder 60 drives the lower pressing head 603 to retract, and the upper hydraulic cylinder 59 continues to drive the upper pressing head 602 to abut against the blank and move downward until the lower hydraulic cylinder 60 operates to the lower limit position. At this time, the mold bottom plate 63 is flush with the lower surface of the mold sleeve 61.

[0116] The displacement sensor 604 described above is also provided between the upper hydraulic cylinder 59 and the lower hydraulic cylinder 60, and the displacement sensor 604 includes a grating ruler 641 and a grating ruler detection slider 642 sliding on the grating ruler 641. The grating ruler 641 is vertically arranged below the movable cross beam 601 and is installed through a support and the movable cross beam 601, and the grating ruler detection slider 642 is arranged on the piston rod of the lower hydraulic cylinder 60, and the grating ruler detection slider 642 is also installed through a support, as shown in Figure 17 .

[0117] After the final pressing machine 57 runs once, the final pressing head cleaning device 65 needs to clean the mold cover plate 62 of the upper pressing head 602 to prevent material sticking and prepare for the next final pressing. The final pressing head cleaning device 65 is arranged on one side of the final pressing machine 57, and the position of the final pressing head cleaning device 65 is fixed. The final pressing head cleaning device 65 and the pre-pressing head cleaning device 44 have the same structure and the same principle, and details are not repeated here.

[0118] After the molding material is pressed into the oil stone 26 blank by the final pressing machine 57, the bottom plate ejection device 66 is needed to eject the pressed oil stone 26 blank, and the mold bottom plate 63 is ejected and the oil stone 26 blank is removed from the mold cavity 64. The bottom plate ejection device 66 is arranged on the lower frame, and the mold bottom plate 63 and the bottom plate ejection device 66 are arranged in correspondence. The bottom plate ejection device 66 includes an unloading hydraulic cylinder 67, a slider guide rod 68, an unloading fixed plate 69, an unloading slider 70, an ejection block 71, and an unloading buckle plate 72, as shown in Figure 18 and Figure 19 .

[0119] The unloading hydraulic cylinder 67 is connected to the lower part of the equipment through a support, and the unloading fixed plate 69 is arranged above the unloading hydraulic cylinder 67 in intervals. The unloading fixed plate 69 is horizontally arranged and is part of the sliding chute 9, that is, when the mold 6 moves to the position of the bottom plate ejection device 66, the mold 6 is supported by the unloading fixed plate 69. The unloading hydraulic cylinder 67 and the unloading fixed plate 69 are connected and fixed through four slider guide rods 68 to fix the unloading fixed plate 69.

[0120] The unloading fixed plate 69 is provided with an "L"-shaped unloading buckle plate 72 for clamping the mold sleeve 61. The unloading buckle plate 72 and the working buckle plate 43 described above have the same structure and the same function. When the mold 6 moves to the unloading fixed plate 69, the unloading buckle plate 72 clamps the mold sleeve 61 to achieve fixation.

[0121] The ejector slider 70 is slidably connected to the slider guide rod 68 through a linear bearing, and the piston rod of the ejector hydraulic cylinder 67 is connected to the ejector slider 70, so that the ejector slider 70 can slide vertically up and down. The ejector slider 70 is provided with ejector blocks 71 on both sides, and the ejector slider 70 and the ejector blocks 71 move together. The ejector blocks 71 pass through the ejector fixed plate 69 upward and abut against the die bottom plate 63. Magnets 73 are arranged on both sides above the ejector blocks 71, and are used to attract the die bottom plate 63, thereby assisting the resetting of the die bottom plate 63.

[0122] The principle of the bottom plate ejecting device 66 is as follows: when the large turntable 3 drives the mold 6 to move to the position above the bottom plate ejecting device 66, the movement is stopped, and at this time, the mold sleeve 61 is fixed by the ejector clamping plate 72. The ejector hydraulic cylinder 67 operates to drive the ejector slider 70 and the two ejector blocks 71 to move upward together. After the ejector blocks 71 pass through the ejector fixed plate 69, the ejector blocks 71 contact and attract the die bottom plate 63. The ejector hydraulic cylinder 67 continues to move upward to push the die bottom plate 63 and the oil stone 26 blank in the mold cavity 64 to move upward together, until the oil stone 26 blank is separated from the mold cavity 64.

[0123] The blank is manually taken out, and the entire surface of the mold 6 is blown by a pneumatic blow gun to ensure cleanliness and no adhesive material. After the blank is manually taken out, the ejector hydraulic cylinder 67 moves downward. Since the ejector blocks 71 attract the die bottom plate 63 through the magnets 73, the die bottom plate 63 can also be driven to move downward. The mold release agent is applied in the mold cavity 64 by manual operation.

[0124] The entire operation process of the present application is as follows: first, the mold 6 is cyclically rotated: the driving mechanism 2 drives the large turntable 3 to intermittently rotate with the molds 6. During the rotation, the positioning mechanism 5 and the positioning block 4 cooperate to achieve precise positioning of the large turntable 3, and the molds 6 are cyclically positioned between the various stations.

[0125] During the cyclic rotation of the mold 6, each mold 6 cyclically passes through the bottom plate resetting device 10, the first weighing and feeding device 16, the first layer of material scraping and flattening device 27, the first layer of material scraping and flattening device 40, the pre-pressing press 42, the pre-pressing head cleaning device 44, the second weighing and feeding device 54, the second layer of material scraping and flattening device 55, the second layer of material scraping and flattening device 56, the final pressing press 57, the final pressing head cleaning device 65 and the bottom plate ejecting device 66. The bottom plate resetting device 10 is the initial position of the entire production line, and the bottom plate ejecting device 66 is the final position of the entire production line. The mold 6 is repeatedly circulated between the initial position and the final position. The large turntable 3 rotates one position each time, and the formation of two oil stones 26 is completed, so that the mechanical oil stone 26 manufacturing can be realized.

[0126] The above-described embodiments are only preferred embodiments of the present application, and are not intended to limit the scope of the present application. Any equivalent changes or modifications made in accordance with the structure, features and principles described in the patent scope of the present application shall be included in the patent scope of the present application.

Claims

1. A precision double-sided oilstone multi-station automatic forming machine, characterized in that, The rotating device includes a central column (1), a drive mechanism (2), a large turntable (3) that is intermittently rotated on the central column (1), and an upper frame and a lower frame that are fixed on the central column (1) and located on the upper and lower sides of the large turntable (3), respectively. The drive mechanism (2) is geared to the large turntable (3). The large turntable (3) is provided with multiple molds (6) around its periphery. Each mold (6) includes a mold sleeve (61), a mold cover plate (62), and a mold base plate (63). The mold sleeve (61) has two mold cavities (64) inside. Each mold cavity (64) is fitted with the mold cover plate (62) and the mold base plate (63) on the upper and lower sides. The mold cover plate (62) and the mold base plate (63) are fitted together to press the oilstone (26). The lower frame is provided with a circular slide (9) for carrying the movement of the mold (6). The bottom surface of the mold base plate (63) contacts the slide (9). The rotary device is provided with the following components arranged clockwise around its periphery: a base plate resetting device (10) for resetting the mold base plate (63); a primary weighing and feeding device (16) for feeding molding material into the mold cavity (64); a first-layer material leveling device (27) for leveling the molding material in the mold cavity (64); a first-layer material scraping device (40) for scraping the molding material in the mold cavity (64); a pre-pressing press (42) for pre-pressing the molding material; a pre-pressing head cleaning device (44); a secondary weighing and feeding device (54); a second-layer material leveling device (55); a second-layer material scraping device (56); a final pressing press (57) for final pressing the molding material; a final pressing head cleaning device (65); and a base plate ejection device (66) for ejecting the mold base plate (63).

2. The precision double-sided oilstone multi-station automatic forming machine according to claim 1, characterized in that, The drive mechanism (2) is arranged below the large turntable (3). The drive mechanism (2) includes a motor (201), a reducer (202) and an indexing head (203). The output shaft of the motor (201) is connected to the input shaft of the reducer (202). The output shaft of the reducer (202) is connected to the input shaft of the indexing head (203). The output shaft of the indexing head (203) is gear-driven to the large turntable (3). The center of the large turntable (3) is sleeved on the central column (1) and a bearing is provided between them. The large turntable (3) is provided with multiple positioning blocks (4) around its perimeter. The lower frame is also provided with a positioning cylinder. The piston rod of the positioning cylinder is connected with a positioning pin. The positioning pin extends into the positioning block (4) and engages for positioning.

3. The precision double-sided oilstone multi-station automatic forming machine according to claim 1, characterized in that, The bottom plate reset device (10) is installed on the upper frame. The bottom plate reset device (10) and the mold bottom plate (63) are arranged vertically and vertically respectively. The bottom plate reset device (10) includes a fixed frame (11), a bottom plate pressing cylinder (12), a guide frame (13), a lower slider (14), and a bottom plate pressing head (15). The fixed frame (11) is set on the upper frame. The bottom plate cylinder (12) is set above the fixed frame (11). The piston rod of the bottom plate cylinder (12) extends downward to connect to the guide frame (13). The guide frame (13) is vertically slidable below the fixed frame (11). The lower end of the guide frame (13) extends out of the fixed frame (11) to connect to the lower slide block (14). The bottom plate pressure head (15) is set on both sides of the lower slide block (14). The bottom plate pressure heads (15) on both sides face the two mold cavities (64) respectively.

4. The precision double-sided oilstone multi-station automatic forming machine according to claim 1, characterized in that, The primary weighing and feeding device (16) and the secondary weighing and feeding device (54) have the same structure; The single weighing and feeding device (16) includes a stand (17), a weighing feeder (18) with a hopper, a tiltable weighing hopper (19) and a vibrating funnel (20), which are arranged in a stepped manner. The stand (17) extends vertically upward over the large turntable (3). Two weighing feeders (18) are provided on one side above the stand (17). The weighing feeder (18) is either a belt weighing feeder (18) or a weighing vibrating feeder. The weighing hopper (19) is provided on the other side above the stand (17). The weighing hopper (19) is hinged to the stand (17). A tilting cylinder (25) is also provided between the weighing hopper (19) and the stand (17). A partition is provided in the middle of the weighing hopper (19) to divide the weighing hopper (19) into two flow channels. The flow channels are respectively connected to the two weighing feeders (18). The vibrating funnel (20) includes a vibrating plate (22) with a vibrating motor (21) and two funnels (23) set at one end of the vibrating plate (22). The vibrating plate (22) is set on the upper frame. The funnels (23) and the mold cavity (64) are vertically aligned. The two funnels (23) are connected to two flow channels above each other.

5. The precision double-sided oilstone multi-station automatic forming machine according to claim 1, characterized in that, The first-layer material leveling device (27) and the second-layer material leveling device (55) have the same structure and are both set on the upper frame, corresponding to the mold (6) above and below; The material leveling device (27) includes an upper support plate (28), a fixed column (30) with an internal long groove (29), a lifting cylinder (31), a height-fixing rod (32), a lifting slide (33), an upper connecting plate (34), a horizontal cylinder (35), comb teeth (36), a micro-lifting multi-position cylinder (37), a cylinder slider (38), and a height-fixing block (39). The fixed column (30) is vertically arranged above one side of the upper support plate (28). The long groove (29) is vertically arranged inside the fixed column (30). The lifting cylinder (31) is arranged above the fixed column (30). The piston rod of the lifting cylinder (31) extends downward into the long groove (29) and is connected to the fixed height rod (32). The lifting slide (33) has a "U" shaped cross section surrounding the three sides of the fixed column (30) and slides up and down with the fixed column (30). The piston rod of the lifting cylinder (31) is connected to the lifting slide (33) through the upper connecting plate (34). The horizontal cylinder (35) is arranged below the lifting slide (33). The horizontal cylinder (35) is a horizontally moving rodless cylinder. Two comb teeth (36) are arranged side by side on the horizontal cylinder (35). The comb teeth (36) are comb-shaped. The micro-lifting multi-position cylinder (37) is horizontally arranged above the other side of the upper support plate (28). The piston rod of the micro-lifting multi-position cylinder (37) is connected to the cylinder slider (38). The cylinder slider (38) extends horizontally into the bottom of the long groove (29). Multiple height-fixing blocks (39) are spaced apart above the cylinder slider (38). The height-fixing blocks (39) are bolted. The height of the multiple height-fixing blocks (39) increases sequentially. The height-fixing rod (32) presses down on the multiple height-fixing blocks (39) sequentially.

6. The precision double-sided oilstone multi-station automatic forming machine according to claim 5, characterized in that, The first-layer material leveling device (40) and the second-layer material leveling device (56) have the same structure and are both set on the upper frame and correspond to the mold (6) above and below; The structure of the layer material leveling device (40) and the layer material scraping device (27) is the same. The two scraper plates (41) are arranged side by side on the horizontal cylinder (35) of the layer material leveling device (40). The scraper plates (41) are square plates.

7. The precision double-sided oilstone multi-station automatic forming machine according to claim 1, characterized in that, The pre-press press (42) is a C-type single-arm hydraulic press, and a mold cover plate (62) is provided on the press head of the pre-press press (42). The final press (57) is a double-column hydraulic press. The final press (57) includes the central column (1), side columns (58), upper hydraulic cylinder (59), lower hydraulic cylinder (60) and movable crossbeam (601). The central column (1) and side columns (58) are arranged vertically and are parallel to each other. The upper hydraulic cylinder (59) is set between the top of the central column (1) and the side columns (58), and the lower hydraulic cylinder (60) is set between the bottom of the central column (1) and the side columns (58). The piston rods of the upper hydraulic cylinder (59) and the lower hydraulic cylinder (60) are arranged coaxially. The piston rod of the upper hydraulic cylinder (59) is connected to the movable crossbeam (601), which slides between the central column (1) and the side column (58). An upper pressure head (602) with a mold cover plate (62) is provided below the movable crossbeam (601), and a lower pressure head (603) is provided on the piston rod of the lower hydraulic cylinder (60). The upper pressure head (602) and the lower pressure head (603) work together to press the oilstone (26). A displacement sensor (604) is also provided between the upper hydraulic cylinder (59) and the lower hydraulic cylinder (60). The displacement sensor (604) includes a grating ruler (641) and a grating ruler detection slider (642) that slides on the grating ruler (641). The grating ruler (641) is vertically arranged below the movable crossbeam (601), and the grating ruler detection slider (642) is arranged on the piston rod of the lower hydraulic cylinder (60). The slide (9) goes around to the worktable of the pre-press press (42) and the final press press (57). On both sides of the slide (9) corresponding to the worktable, there are "L"-shaped working buckles (43) for snapping the mold sleeve (61). The lower pressure head (603) of the piston rod of the lower hydraulic cylinder (60) passes upward through the worktable of the final press press (57) and abuts against the bottom plate (63) of the mold.

8. The precision double-sided oilstone multi-station automatic forming machine according to claim 1, characterized in that, A pre-press head cleaning device (44) is provided on one side of the pre-press press (42), and a final press head cleaning device (65) is provided on one side of the final press press (57). The pre-press head cleaning device (44) and the final press head cleaning device (65) have the same structure. The pre-press head cleaning device (44) includes a fixed guide seat (45), a horizontal guide rod (46), a guide cylinder (47), a slide plate (48), a bearing seat (49), a cleaning rubber roller (50), and a receiving box (51). The horizontal guide rod (46) is horizontally slidably connected inside the fixed guide seat (45). The guide cylinder (47) is horizontally arranged above the fixed guide seat (45). The piston rod of the guide cylinder (47) is connected to the slide plate (48), and one side of the slide plate (48) is connected to the horizontal guide rod (46). The upper sides of the slide plate (48) are elastically connected to the bearing seats (49), and the cleaning rubber roller (50) is rotatably arranged between the bearing seats (49) on both sides. A receiving box (51) is also provided on the slide plate (48) below the cleaning rubber roller (50).

9. The precision double-sided oilstone multi-station automatic forming machine according to claim 1, characterized in that, The bottom plate ejection device (66) is installed on the lower frame. The bottom plate (63) and the bottom plate ejection device (66) are arranged vertically and vertically. The bottom plate ejection device (66) includes a mold removal hydraulic cylinder (67), a slider guide rod (68), a mold removal fixing plate (69), a mold removal slider (70), an ejection block (71), and a mold removal buckle plate (72). The demolding hydraulic cylinder (67) is provided with a demolding fixing plate (69) at intervals above it. The demolding fixing plate (69) is provided with "L"-shaped demolding buckles (72) on both sides for snapping the mold sleeve (61). The demolding hydraulic cylinder (67) and the demolding fixing plate (69) are connected and fixed by the slider guide rod (68). The unmolding slider (70) is slidably connected to the slider guide rod (68). The piston rod of the unmolding hydraulic cylinder (67) is connected to the unmolding slider (70). The ejector blocks (71) are provided on both sides of the unmolding slider (70). The ejector blocks (71) pass upward through the unmolding fixing plate (69) and abut against the mold base plate (63). Magnets (73) are provided on both sides above the ejector blocks (71).

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