CN102794922A

CN102794922A - Automatic cold press of diamond segment

Info

Publication number: CN102794922A
Application number: CN2011101390557A
Authority: CN
Inventors: 许祥熙
Original assignee: Individual
Current assignee: Shantou Yue Xi Machinery Co Ltd
Priority date: 2011-05-26
Filing date: 2011-05-26
Publication date: 2012-11-28
Anticipated expiration: 2031-05-26
Also published as: CN102794922B

Abstract

The invention discloses an automatic cold press of a diamond segment. The automatic cold press comprises a plurality of molds with mold chambers, a rotary working table, a plurality of feeding devices, a plurality of material flattening devices, a pressing device, a demolding device, a mold calibrating device and a control device, wherein the rotary working table is provided with working positions which are distributed for one circle at equal intervals; the molds are arranged on the working positions in one-to-one correspondence; the feeding devices, the material flattening devices, the pressing device, the demolding device and the mold calibrating device are arranged around the rotary working table; in accordance with the rotation direction of the rotary working table, the feeding devices and the material flattening devices are arranged in sequence alternatively; and each feeding device and the material flattening device correspond to one working position on the rotary working table; the pressing device, the demolding device and the mold calibrating device are arranged in sequence and correspond to the working positions in sequence after the feeding devices and the material flattening devices are rotated; and the control device is electrically connected with the devices and is used for controlling the actions of the devices. By utilizing the automatic cold press of the diamond segment, the procedures of feeding, pressing, demolding and the like can be accomplished automatically with high production efficiency.

Description

Automatic cold press for diamond segments

Technical Field

The invention relates to a cold press, in particular to an automatic cold press for diamond segments.

Background

Since the diamond segment has a multi-layer structure and the material of each layer is different in some cases, there is a large limitation in the manufacturing process, particularly in the cold pressing process. On one hand, the automatic preparation of multilayer blocks, such as three layers, five layers or seven layers, cannot be completed in one device, so that the production efficiency is low, and the time and the labor are wasted; on the other hand, the precision of each layer of powder cannot be ensured in the preparation.

Disclosure of Invention

The invention aims to solve the technical problem that the multi-layer diamond segment cannot be automatically cold-pressed in the prior art, and provides an automatic cold press for the diamond segment, which can complete the filling and cold pressing of multi-layer powder in one device and completely realize automatic production.

The technical scheme adopted by the invention for solving the technical problems is as follows: the automatic cold press for the diamond segments comprises a plurality of dies with die cavities, a rotary workbench, a plurality of feeding devices, a plurality of flattening devices, a pressing device, a demolding device, a die correcting device and a control device; wherein,

the rotary worktable is provided with stations which are annularly distributed for one circle at equal intervals;

the molds are arranged on the stations in a one-to-one correspondence manner;

the feeding device, the material flattening device, the pressing device, the demolding device and the mold correcting device are annularly distributed around the rotary workbench; according to the rotating direction of the rotating workbench, the filling devices and the flattening devices are sequentially and alternately arranged, each filling device and each flattening device correspond to a station on the rotating workbench, and the pressing device, the demolding device and the mold correcting device are sequentially arranged and correspond to the stations behind the rotating direction of the filling devices and the flattening devices;

the control device is electrically connected with the filling device, the flattening device, the pressing device, the demolding device, the mold calibrating device and the rotary workbench and controls the actions of the filling device, the flattening device, the pressing device, the demolding device and the mold calibrating device.

In an automatic cold press for diamond segments according to an embodiment of the present invention, the mold comprises an upper mold and a lower mold; wherein,

the upper die is provided with a die cavity;

the lower die comprises a spring part, a base and die rods in one-to-one correspondence with the die cavities, the die rods stretch into the die cavities and are in sliding connection with the die cavities, and the spring part is arranged between the upper die and the base.

In the automatic cold press for diamond segments according to the embodiment of the invention, the rotary worktable comprises a rotary table top provided with the station, a circular rail which is coaxial with the rotary table top and is positioned below the rotary table top, and a driving mechanism for driving the rotary worktable to rotate, wherein the rotary table top and the circular rail rotate at the same speed.

In an automated cold press for diamond segments according to an embodiment of the present invention, the rotating table comprises a clamp that clamps an upper die of the mold; and the base of the lower die is supported on the circular track.

In the diamond segment automatic cold press according to the embodiment of the invention, the driving mechanism comprises an intermittent gradiometer for controlling the rotation time and the intermittent time of the rotary worktable, a propeller for pushing the rotary worktable to rotate and a brake for braking the rotary worktable; and the main shaft of the intermittent type indexing meter is a rotating shaft of the rotating workbench.

In the diamond segment automatic cold press according to the embodiment of the invention, a bracket with pulleys is arranged in the rotary worktable, and the rotary table top is supported on the bracket.

In the automatic cold press for diamond segments, the pressing device comprises a bracket, an oil cylinder and a first pressing head arranged on the bracket; a flat plate covering all die cavities of the die is arranged at the end part of the first pressure head; and a piston rod of the oil cylinder is connected with the pressure head, and the pressure head corresponds to the die up and down.

In the automatic cold press for the diamond segments, the demolding device comprises a support, a second pressure head arranged on the support, an oil cylinder and a piece conveying mechanism; the end part of the pressure head is provided with a demoulding part, and the demoulding part corresponds to the upper die outside the die cavity up and down; and a piston rod of the oil cylinder is connected with the pressure head.

In the automatic cold press for diamond segments, provided by the embodiment of the invention, the die calibration device comprises a jacking mechanism, a height limiting mechanism and an oil cylinder.

In the automatic cold press for the diamond segments, the jacking mechanism comprises a jacking rod and a clamping piece, one end of the jacking rod is propped against the bottom surface of an upper die of the die, the other end of the jacking rod is connected with a piston rod of the oil cylinder, and the jacking rod penetrates through the circular track through the clamping piece; the height limiting mechanism comprises a fixed bearing, and the end face of the bearing is abutted against the top surface of the upper die of the die.

The invention has the following beneficial effects: because the rotary worktable with a plurality of stations is arranged in the automatic cold press for the diamond segment, the mould with the mould cavity is arranged on the rotary worktable, and the control device controls the electric connection of the filling device, the flattening device, the pressing device, the demoulding device, the mould correcting device and the rotary worktable and controls the actions of the filling device, the flattening device, the pressing device, the mould correcting device and the rotary worktable, the automatic completion of the processes of filling, flattening, pressing, demoulding and mould correcting is realized.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic diagram of the construction of an automated cold press for diamond segments according to an embodiment of the present invention;

FIG. 2A is a schematic structural view of a mold according to an embodiment of the present invention;

FIG. 2B is a bottom view of the mold of FIG. 2A;

FIG. 2C is a top view of the mold of FIG. 2A;

FIG. 3A is a schematic structural diagram of a rotary table according to an embodiment of the present invention;

FIG. 3B is a schematic structural diagram of a rotary table according to an embodiment of the present invention;

FIG. 4A is a schematic structural diagram of a packing assembly according to an embodiment of the present invention;

FIG. 4B is a schematic view of the magazine of the filling device of FIG. 4A;

FIG. 4C is a schematic view of the dosing device of the filling device of FIG. 4A;

FIG. 5 is a schematic structural diagram of a flattening apparatus according to an embodiment of the invention;

FIG. 6 is a schematic structural view of a pressing apparatus according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of a demolding apparatus according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a mold correction device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 to 8, in an automatic cold press for diamond segments according to an embodiment of the present invention, a plurality of molds 100 with cavities, a rotary table, a plurality of filling means, a plurality of leveling means, a pressing means, a demolding means, a mold correction means, and a control means are included. Wherein, the swivel work head can rotate around the center pin of self, and is equipped with the station of equidistance interval ring cloth round on the swivel work head, and mould 100 one-to-one sets up on the station. Thus, while the rotary table is rotating, the mold 100 is correspondingly rotated about the axis of rotation. In addition, a plurality of filling devices, a plurality of flattening devices, a pressing device, a demolding device and a mold correcting device are annularly distributed around the rotary workbench, according to the rotating direction of the rotary workbench, the filling devices and the flattening devices are sequentially and alternately arranged, the number of the filling devices is the same as that of the flattening devices, or the number of the flattening devices is one less than that of the filling devices, the specific number is selected according to the number of the segments, for example, if seven layers of diamond segments are prepared, seven filling devices are selected to complete seven times of filling. The pressing means, the stripping means and the mould correction means are then arranged in sequence, all in all equally spaced manner around the rotary table to form a circle. In addition, each of the filling device, the flattening device, the pressing device, the demolding device and the mold correction device corresponds to one station on the rotary table. The control device is respectively electrically connected with the filling device, the flattening device, the pressing device, the demolding device, the mold correcting device and the rotary workbench to control the actions of the filling device, the flattening device, the pressing device, the demolding device and the mold correcting device, so that the filling device, the flattening device, the pressing device, the demolding device and the mold correcting device can work in cooperation with the rotary workbench, and particularly can work in cooperation with the mold 100 on the rotary workbench. Fig. 1 shows an exemplary structure of an automatic cold press for diamond segments according to a preferred embodiment of the present invention, and it is clearly seen from the figure that a packing device 300 and a pressing device 500, which are arranged around the periphery of a rotary table 200, are operated in cooperation with the rotary table 200.

The mold 100 is typically a steel mold so that it can withstand the pressure treatment during the diamond segment preparation process. As shown in fig. 2A, the mold 100 according to the embodiment of the present invention includes an upper mold and a lower mold, and the upper mold is provided with a plurality of cavities 111, for example, four or six cavities, etc., so that a plurality of workpieces can be manufactured in one mold 100 in one manufacturing process, thereby improving the production efficiency. The lower die is located below the upper die and comprises a spring piece, a base 121 and a die rod 122. The mold rods 122 are fixedly arranged on the base 121 and are in one-to-one correspondence with the mold cavities 111, and the mold rods 122 extend into the mold cavities 111 to be slidably connected with the mold cavities 111. A plurality of spring members (not shown) are disposed between the bases 121 of the upper and lower molds, and the reference numeral 123 represents a position where the spring members are disposed, wherein one end is disposed on the upper mold from the bottom up, and the other end is disposed on the base 121. Fig. 2B is a bottom view of the mold 100 showing the base 121 with a plurality of mold pins 122 disposed thereon. In the top view of the mold 100 of fig. 2C, the upper mold is shown with a plurality of cavities 111, the cavities 111 and the mold pins 122 being in one-to-one up-and-down correspondence.

When the mold 100 is pressed downward by external pressure, the upper mold moves downward, and accordingly, relative movement occurs between the mold cavity 111 moving downward and the fixed mold bar 122; the spring member at 123 is forced to compress. When the external pressure is removed, the spring member is deformed again, and drives the upper die to move to the initial position, and meanwhile, the die cavity 111 and the die rod 122 move relatively.

As shown in fig. 3A and 3B, in an embodiment of the present invention, the rotary table includes a rotary table top 210, a circular track, and a drive mechanism. Wherein the rotary table 210 is preferably provided in a circular shape to more conveniently cooperate with the mold 100 during rotation, it should be understood that the rotary table 210 may be provided in other regular or irregular shapes or modified on the basis of a circular shape, but the above is within the scope of the present invention. In addition, in order to facilitate the rotation of the rotary table, the rotary table 210 is made of a light aluminum alloy material, however, in general, the plurality of steel molds 100 and the rotary table 210 still weigh 150 kg, have a very large weight, and accordingly have a large inertia during the rotation process, and are difficult to start and brake, so that a circular bracket with pulleys is arranged at a position corresponding to the turntable at the bottom of the rotary table 210, which can further support the self weight of the steel molds 100 and the rotary table 210, and can also assist the rotation of the rotary table, so that the rotation is more labor-saving, and the positioning accuracy of the rotary table is improved.

As shown in fig. 3B, the rotary table 210 is provided with a plurality of stations, each indicated by reference numeral 800, spaced at equal intervals and arranged in a circle, and each station corresponds to one of the plurality of filling devices, the plurality of flattening devices, the pressing device and the demolding device. In the embodiment of the invention, taking preparation of seven-layer diamond segments as an example, 7 filling stations and 6 flattening stations are selected, and a pressing station, a demolding station and a mold checking station, which are immediately behind the filling station and the flattening station in the rotating direction of a rotating table top, are 16 stations in total. In addition, each station is provided with a mold 100, the rotary table 210 is provided with a clamp, the mold 100 is fixed by clamping the upper mold part of the mold 100, and the end faces of the upper molds of all the molds are ensured to be in the same horizontal plane in the installation process.

As shown in fig. 3A, the rotary table is further provided with a circular track 220, and the circular track 220 is located below the rotary table 210 and rotates together with the rotary table 210 at the same speed. The base of the mold 100 rests on the circular track 220 and the mold 100 rotates at the same speed as the circular track 220 and the rotating table 210 rotate. It can also be seen that the spacing between the rotating table 210 and the circular track 220 is determined by the top and bottom dimensions of the mold 100.

The driving mechanism provided in the rotary table is used to control the action of the rotary table, wherein the driving mechanism includes a propeller 232 for pushing the rotary table to rotate, a brake 233 for braking the rotary table, and an intermittent index meter 231. In an embodiment of the present invention, a stepping motor may be selected as the propeller 232 and a decelerator may be selected as the brake 233. The intermittent index meter 231 is assigned to the rotation angle corresponding to each station according to the total number of the stations, so that the molds on the rotary table 210 and the output ends of the devices are in one-to-one correspondence after each rotation, thereby being capable of working in cooperation with each other and reducing errors. The precision of the indexing directly influences whether the preparation of the diamond segment can be finished smoothly. For example, in the case of the mold 100 on the filling station of the rotary table and the filling device cooperating therewith, if the precision of the intermittent type gradiometer is not sufficient, the discharge ports of the filling device may not correspond to the cavities of the mold 100 one by one, and the raw material cannot be accurately fed into the cavities, thereby causing a large error in the finished product.

Each filling device is used for respectively putting powder of each layer in the diamond segment into each die 100. As shown in fig. 4A-4C, in the first embodiment of the filling device of the present invention, a blanking device, a platform 32, a feeding device, a measuring device and a mold 100 are included. The blanking device comprises a hopper 311 and a blanking channel 313 arranged at the bottom of the hopper 311. In this embodiment, a controllable gate 312 is disposed between the hopper 311 and the blanking channel 313, and the controllable gate 312 controls the conduction between the hopper 311 and the blanking channel 313, in other words, the opening or closing of the controllable gate 312 controls the powder to be loaded to fall from the hopper 311 to the blanking channel 313, so as to adjust the powder loading amount at one time. Sensors (not shown in the figures) may also be installed in the hopper 311 to alarm in the event of a shortage. To facilitate the blanking, the lower half of the hopper 311 is in the shape of an inverted cone in this embodiment.

A platform 32 is arranged below the blanking device, a supporting plate 321 with a powder channel 3211 is arranged on the upper surface of the platform 32, and the powder channel 3211 is a through hole arranged on the supporting plate 321 and used for powder to pass through. The plate 321 is preferably made of a stainless steel material to ensure that the upper surface of the plate 321 is level and smooth.

The feeding device is located between the blanking device and the platform 32, and comprises a material box 331 and a driving mechanism, wherein the top surface and the bottom surface of the material box are both provided with openings. Wherein, the material box 331 is slidably disposed on the upper surface of the supporting plate 321, the material box 331 in this embodiment is a double-layer material box, as shown in fig. 4B, the material box 331 is divided into an upper layer material box 3311 and a lower layer material box 3312 by a partition plate 3313; the partition board 3313 has a plurality of powder leaking tubes 3314 uniformly distributed thereon, and the upper material box 3311 and the lower material box 3312 are communicated via the powder leaking tubes 3314. Here, the number of the powder leaking tubes 3314 is preferably 5, and the sectional area is similar to that of the top opening of the measuring cup 341. The purpose of the double-layer material box is that after the powder material enters from the upper material box 3311 through the powder leaking pipe 3314, the powder material falling on the lower material box 3312 is more uniform and smoother than the powder material falling directly, and the situation that the powder material is piled up can not occur. In this embodiment, magazine 331 is not provided with a bottom plate, but directly slides on pallet 321, and pallet 321 is used as a bottom plate. The upper surface of the supporting plate 321 is horizontal and smooth, which is beneficial to the sliding and the scraping of the material box 331.

The driving mechanism comprises a sliding table cylinder 3321 fixedly mounted on the platform 32, and a pulling piece connected with a piston rod of the sliding table cylinder 3321 and the material box 331. Thereby driving the magazine 331 to slide back and forth on the support plate 321. The pulling part comprises a connecting rod 3322 and a transmission rod 3323 positioned right below the connecting rod 3322. The connecting rod 3322 and the transmission rod 3323 are fixedly connected by a plurality of (two shown in fig. 4A) spring screws 3324, and a plurality of (two shown in fig. 4A) spring screws 3325 are caught between the connecting rod 3322 and the transmission rod 3323. The spring screw 3325 comprises a screw and a spring sleeved on the screw, the spring is compressed between the connecting rod 3322 and the transmission rod 3323, one end of the connecting rod 3322 is fixedly connected with the material box 331, and the transmission rod 3323 is connected with a piston rod of the sliding table cylinder 3321. With this arrangement, the restoring force of the compression screw 3325 attempts to spring apart the transmission rod 3323 and the connecting rod 3322. The spring screw 3324 comprises a screw and a spring fitted thereon, which attempts to further compress the transmission rod 3323 and the connecting rod 3322, and after balancing, the magazine 331 is in a position on the plate 321 such that it can slide freely on the plate 321 with a minimum gap from the plate 321. In addition, through this setting, transfer line 3323 can be with the output transmission of slip table cylinder 3321 to connecting rod 3322, then drive magazine 331 and reciprocate to slide on layer board 321. When the material box 331 slides to the lower part of the hopper 311, the top opening is communicated with the blanking channel 313; when the powder slides to the upper part of the powder passage 3211, the bottom opening of the material box 331 is communicated with the powder passage 3211.

In this embodiment, the feeding device further includes a dredging member 333, two ends of which are respectively fixedly connected with the pulling member and the material box 331. The dredging member 333 comprises a dredging rod 3331 and a lifting mechanism for driving the dredging rod 3331 to move up and down. The driving mechanism can drive the dredging piece 333 and the material box 331 to slide back and forth together, so that the dredging rods 3331 correspond to the powder channel 3211 one by one up and down when the dredging piece 333 is positioned above the powder channel 3211. When the lifting mechanism is started, the dredging rod 3331 can be pressed into the powder channel 3211, and when the bonded powder is filled, the external pressure provided by the dredging rod 3331 can assist the powder to be led out from the powder channel 3211 and the corresponding measuring cup 341.

The measuring device is located below the platform 32 and comprises a plurality of measuring cups 341, and the measuring cups 341 are used for weighing the powder to be filled. The measuring cups 341 are arranged on the lower surface of the supporting plate 321 at intervals, that is, the top opening end surfaces of the measuring cups 341 are tightly attached to the lower surface of the supporting plate 321, so as to ensure that the top opening end surfaces of the measuring cups 341 are positioned on the same horizontal plane, and ensure that the powder amount in each measuring cup is the same. A controllable valve 342 is arranged at the outlet at the bottom of the measuring cup 341 to control the powder to fall out of the measuring cup 341.

The dosing device further comprises a clamp 344 for clamping the measuring cup 341 and a stop 343, the clamp 344 preferably being made of stainless steel. In this embodiment, the limiting member 343 penetrates through the clamp 344 from bottom to top to fixedly connect the measuring cup 341 below the platform 32. Since the amount of powder to be charged each time is different in the process of filling, in order to enable the filling machine to be used in a wider range, the measuring cup 341 is preferably a movable sleeve, and when the up-down position of a clamp for holding the measuring cup 341 is changed by adjusting the limit piece 343 up and down, the movable sleeve as the measuring cup 341 is correspondingly extended and contracted up and down, thereby obtaining measuring cups having different capacities. As shown in fig. 4C, when the bottom of the measuring cup 341 is contracted to the position a, the capacity is small; when the bottom of the measuring cup 341 is extended to the b position, the capacity is large. While the adjustment blade 321 is located on a horizontal plane so that the top opening surfaces of all the measuring cups 341 are located on the same horizontal plane, thereby ensuring that the capacity of each measuring cup 341 is the same. To facilitate the blanking, the bottom of the measuring cup 341 is set to be an inverted cone. The mold 100 is arranged below the material metering device, the mold 100 comprises a plurality of mold cavities 111 to be filled with powder, and the opening of the mold cavity 111 is positioned below the opening at the bottom of the measuring cup 341 so that the powder can fall into the mold cavities 111 from the measuring cup 341. In order to make the powder falling into the cavity 111 uniform and flat, the sectional area of the bottom opening of the measuring cup 341 is set to be one half, one third, one fourth, or one fifth of the sectional area of the cavity 111, and may be other proportional values, and when the powder flow is allowed, the smaller the sectional area of the bottom opening of the measuring cup 341 with respect to the sectional area of the cavity 111, the higher the accuracy of powder charging. This is particularly important in the production of multilayer materials.

In the primary powder filling process of the embodiment of the invention, the driving mechanism drives the material box 331 to slide to the lower part of the hopper 311, the top opening of the material box 331 is aligned with the blanking channel 313, and after the controllable gate 312 is opened, the powder enters the material box 313 from the hopper 311 through the blanking channel 313. After the quantitative powder falls in, the controllable gate 312 is closed. The powder material first enters the upper material box 3312 of the material box 313 and uniformly falls into the lower material box 3312 through a plurality of powder leaking pipes 3314 arranged on the clapboard 3313. The driving mechanism drives the material box 331 to slide to the upper part of the powder passage 3211 again, and the powder carried in the material box 331 falls into the measuring cup 341 from the powder passage 3211. After the blanking time is over, the driving mechanism is actuated again, the material box 331 slides on the supporting plate 321 repeatedly once, and the powder is scraped on the top opening surface of the powder channel 3211, so that the amount of the powder filled in each measuring cup is the same, and the amount of the powder filled in each measuring cup is accurate. After the sliding motion of the magazine 331 is finished, the controllable valve 342 at the bottom opening of the measuring cup 341 is opened, and the powder falls from the measuring cup 341 into the cavity 111 of the mold 100, thereby completing the powder filling process. If the powder to be filled is bonded, the powder is not easy to fall automatically, and the dredging part 333 is started. The driving mechanism drives the dredging piece 333 to move horizontally to align the dredging rod 3331 with the top opening of the measuring cup 341, and then the lifting mechanism is started to move the dredging rod 3331 up and down under the driving of the lifting mechanism to press out the powder in the measuring cup 341 in an auxiliary manner. Of course, the deoccluding member 333 is selectively actuatable.

In the second embodiment of the present invention, the blanking channel 313 of the blanking device is a flexible tube, one end of the flexible tube is communicated with the hopper 311 through the controllable gate 312, and the other end is connected with the top opening of the material box 331 in a sealing manner, so as to be communicated with the material box 331. The difference from the first embodiment is that the hoses are operated together when the magazine 331 performs reciprocating sliding. In the process of filling powder at a time, when the driving mechanism drives the material box 331 to slide to the upper side of the powder channel 3211 of the supporting plate 321, that is, when the bottom opening of the material box 331 is aligned with the powder channel 3211, the controllable gate 312 of the blanking device is opened, and the powder directly enters the measuring cup 341 through the hose, the material box 31 and the powder channel 211 in sequence. In this design, the cartridge 331 is prevented from sliding on the pallet 321 with the powder, as the uniformity and flatness of the powder in the cartridge 331 may be impaired during the sliding process.

As can be seen from the above, in the embodiment of the present invention, the material box 331 is designed to have a double-layer structure, which increases a process of homogenizing and leveling powder material at a time; meanwhile, after the powder is loaded into the measuring cups 341, the powder at the opening surface at the top of the powder channel 3211 is scraped by the reciprocating sliding of the material box 331, so that the powder with the same quantity is loaded into each measuring cup while the accurate powder loading is ensured; in addition, the secondary packing is adopted, that is, the material is weighed in the measuring cup 341 outside the mold 100 and then is loaded into the cavity 111, instead of directly weighing and loading the material in the cavity 111 of the mold 100, so that the packing accuracy is further improved. With the filling device according to the embodiment of the invention, in the production of diamond agglomerates with a multi-layer material structure, the error of filling each layer of powder is about 0.01g, while the error of the existing other powder filling equipment is generally as high as 0.05g, and if seven layers of diamond agglomerates are produced, the accumulated error is larger.

The flattening device is used for flattening the loaded powder, so that the structures of all layers of the diamond segment block with the multilayer structure are clear and straight, and the error of each layer of the loaded powder is reduced. As shown in fig. 5, the leveling device includes a support 420, a cylinder (not shown), and a third ram 410. The cylinder is fixed to the bracket and the piston rod is connected to the third ram 410. The third ram 410 has pressing rods 411 corresponding to the cavities one by one, and the positions of the pressing rods 411 correspond to the cavities 111 of the mold 100 one by one up and down. Under the pushing action of the oil cylinder, the pressure rod extends into the die cavity 111 from top to bottom to apply pressure to the powder, and proper pressure is set according to the precision requirement of a workpiece so as to flatten the powder; the third ram 410 is raised away from the die cavity 111 and a material leveling operation is completed. The material leveling treatment levels the powder layer after filling, which is beneficial to the next filling, so that the interlayer structure of the diamond segment is clear. The end face of the plunger is provided with a plunger head 412 made of a non-magnetic material, for example a ceramic material. So that the powder is not adhered to the pressure rod head due to static electricity generated by friction when the pressure rod 411 is used for pressing the powder, and the powder is taken out of the die cavity along with the rising of the pressure head, thereby influencing the precision of each layer of powder.

Fig. 6 shows the structure of a pressing device, which is substantially similar to the leveling device, and includes a first ram 510, a flat plate 511 provided at an end of the first ram 510, and a holder. The first ram 510 is connected to the piston rod of a cylinder, where a large tonnage cylinder is selected, so that a greater pressure is generated by the first ram 510. For example, in a preferred embodiment of the invention, a head pressure on the order of 60 tons is selected. The plate 511 vertically corresponds to the upper mold end surface of the mold 100 and has a sufficient area to cover all the ports of the cavity 111 of the upper mold.

When the first ram 510 is driven by the oil cylinder to press downward, the upper die of the die 100 clamped on the rotary table 210 is driven by the flat plate 511 to move downward, and at this time, the end face of the upper die moves below the rotary table. But the base position of the lower mold of the mold 100 is maintained, and only the spring member therein is compressed, whereby the cavity 111 and the mold rod 122 are relatively moved, and the port of the cavity 111 at the upper mold surface is pressed by the plate 511 to be held fixed, so that the spatial volume of the cavity 111 is reduced, so that the powder in the cavity 111 is compressed, thereby completing the pressing. By pressing, the loose layered powder structure can be made into a compact block structure, so that subsequent sintering and other processes can be carried out. When the first ram 510 is lifted off the die 100, the upper die returns to the initial position by the return of the spring element in the die 100, and the single pressing operation is completed, and the multiple layers of powder form a dense diamond segment.

Fig. 7 shows a demolding device, which is similar to the pressing device, comprising a holder, a second ram 610 arranged on the holder, a cylinder, a delivery mechanism and an inbox. The second ram 610 is connected to a piston rod of an oil cylinder, and the oil cylinder which is smaller than the pressing device is selected in the demolding device, and in a preferred embodiment of the invention, the second ram 610 is a 30-ton ram. The end of the second ram 610 is provided with a stripper part 611, the stripper part 611 being exactly opposite the plate 511 of the press, the stripper part 611 being a steel part of any shape, such as a horseshoe or the like, but ensuring that it does not come into contact with the end face of the mould cavity 111 during the pressing down. The demolding part 611 corresponds to the mold 100 up and down, so that the cavity 111 remains unchanged during the process of pressing down the mold 100. The feeding mechanism comprises a sliding table cylinder 621 and a push rod 622, the push rod 622 is connected with a piston rod of the sliding table cylinder 621, so that the push rod 622 can move back and forth in the horizontal direction, the segment can be pushed into the inbox, and therefore, the shape of the demolding part 611 is ensured not to obstruct the movement of the push rod 622.

In the demolding process, the demolding part 611 is driven by the second pressing head 610 to press down the upper mold of the mold 100, the spring part is compressed, the upper mold descends, but the position of the segment in the mold cavity 111 is kept unchanged due to the pressing action of the mold rod 122, and the segment is thereby ejected from the mold 100; then the push rod 622 is driven by the sliding table cylinder 621 to move horizontally, and the segment block left in place is pushed into the mail receiving box; the push rod 622 is retracted and the pressure on the second ram 610 is removed, and the mold 100 returns to the initial position, and a demolding process is completed. The already pressed segment can be ejected from the cavity 111 of the mold 100 by a demolding process.

Fig. 8 shows a mold correction device, since the mold needs to be reset by the spring element therein after being compressed in the pressing process and the demolding process, the spring element is easy to fatigue after being compressed for many times and compressed under a large pressure, and the mold cannot be reset, so that the upper mold end faces of all the molds may not be maintained on the same horizontal plane, thereby introducing errors, and thus the mold needs to be restored to the initial optimal position by the mold correction device. The mold correction device comprises a jacking mechanism, a height limiting mechanism and an oil cylinder. The jacking mechanism comprises a jacking rod 711 and a clamping piece 712, the jacking rod 711 penetrates through the clamping piece 712 to be arranged on the circular track 220, one end of the jacking rod 711 is connected with a piston rod of the oil cylinder, and the other end of the jacking rod 711 is abutted against the lower surface of the upper die of the die 100. The height limiting device comprises a fixed bearing 731 and a fixed bracket 732, preferably two fixed bearings in the embodiment of the present invention. The fixed bearing 731 is fixed on the fixed bracket 732 and abuts against the upper die end face of the die 100; one end of the fixed support is connected with the fixed bearing 731, and the other end of the fixed support is fixedly connected to the machine body of the mold correction device.

In the die calibration process, the ejector rod 711 pushes the upper die of the die 100 upwards under the driving of the oil cylinder, so that the upper die which cannot return to the initial position through the spring piece can return to the initial position; meanwhile, in order to ensure that the position of the upper die does not exceed the initial position, the upper die is set to be limited to be not overhigh, and because the bearing is pressed against the end face of the upper die, the upper die can smoothly slide and cannot be clamped in the rotating process of the rotary workbench, so that the die calibration is finished at one time.

In the preparation of the diamond segment block, the whole process of the preparation method provided by the embodiment of the invention adopts automatic operation, and the corresponding control device comprises a proper circuit, an interface, logic and a program, and can control the filling device, the flattening device, the pressing device, the demolding device and the mold correcting device to respectively cooperate with the rotary worktable, in particular to cooperate with the mold 100 on the rotary worktable. For example, the control device can control the rotary worktable to start rotating and simultaneously stop working of the filling device, the leveling device and other devices; or controlling the rotary worktable to stop rotating and simultaneously starting the filling device, the leveling device and other devices.

In the embodiment of the present invention, the power device in the flattening device, the pressing device, the demolding device and the mold calibration device is selected from the oil cylinder, it should be understood that, in the present invention, the oil cylinder can be replaced by an air cylinder or other similar power devices to produce the same technical effect, and therefore, various modifications and improvements based on the oil cylinder can be within the protection scope of the present invention.

Taking the mold 100 in the first station as an example, describing the working process of the diamond segment automatic cold press, firstly, the control device controls the filling device to perform first layer filling on the mold 100 on the first station; after the filling is finished, the rotary workbench rotates by one station, the first station enters a material leveling station, and the material leveling device is used for leveling the first layer of powder in the die 100; after the material leveling procedure is finished, the rotary worktable rotates one station again, and the first station enters a filling station of the second layer of powder for filling; after the second layer of filler is finished, rotating the rotary workbench by one station, enabling the first station to enter a second material leveling station, and leveling the second layer of powder by the leveling device; by analogy, for example, to prepare a seven-layer diamond segment, seven passes of packing and seven passes of leveling, or seven passes of packing and six passes of leveling, are performed. After the loading is finished, the first station enters a pressing station, the pressing device presses the die 100 downwards to press the powder in the die cavity 111, and therefore the block with the block-shaped compact structure is manufactured. After pressing is finished, the rotary workbench rotates for one station to enter a demolding station, and the demolding device collects pressed blocks into the receiving box after the pressed blocks are withdrawn from the mold 100, so that the mold cavity 100 completes cold pressing of the diamond blocks. After demolding is finished, the rotary workbench rotates by one station to enter a mold correction station, and the mold correction device performs mold correction on the mold 100, so that the mold 100 can be prepared next time. At this point, the sequential operation of the mold 100 at the first station is completed and ready for the next operation. And the mold on the rotary worktable can work continuously after being circulated in sequence.

From the above, the automatic cold press for the diamond segments provided by the embodiment of the invention can automatically finish the cold pressing treatment of the multi-layer diamond segments by arranging the rotary workbench with a plurality of stations, does not need manual intervention, and is high in efficiency. Taking seven layers of diamond segments as an example, if manual charging is adopted, only 75 segments can be prepared in one hour, the automatic equipment of a certain company in Germany can only prepare 86 particles in one hour, and domestic colleges can only generally prepare about 150 particles in one hour, while 2880 particles in one hour can be prepared by adopting the automatic cold press for the diamond segments of the embodiment of the invention, which is 11.5 times of the domestic colleges. Meanwhile, the precision is high, and by adopting the feeding device provided by the embodiment of the invention, the precision of each layer of powder is improved from plus or minus 0.05g to plus or minus 0.01 g. In conclusion, the automatic cold press for the diamond segments provided by the embodiment of the invention has high production efficiency and high precision of the prepared finished products.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims

1. An automatic cold press for diamond segments is characterized by comprising a plurality of dies with die cavities, a rotary workbench, a plurality of feeding devices, a plurality of flattening devices, a pressing device, a demolding device, a die correcting device and a control device; wherein,

the molds are arranged on the stations in a one-to-one correspondence manner;

2. The automated cold press of diamond segments of claim 1, wherein said mold comprises an upper mold and a lower mold; wherein,

the upper die is provided with a die cavity;

3. The automated cold press of diamond segments according to claim 2, wherein said rotary table comprises a rotary table top provided with said stations, a circular track co-rotating with said rotary table top and located below said rotary table top, and a drive mechanism for rotating said rotary table top, said rotary table top rotating at the same speed as said circular track.

4. The automated cold press of diamond segments of claim 3, wherein said rotating table comprises a clamp that holds an upper die of said mold; and the base of the lower die is supported on the circular track.

5. The automated cold press of diamond segments according to claim 3, wherein said drive mechanism comprises an intermittent gradiometer that controls the rotation time and the intermittent time of said rotating table, a propeller that propels said rotating table to rotate, and a brake that brakes said rotating table; and the main shaft of the intermittent type indexing meter is a rotating shaft of the rotating workbench.

6. The automated cold press of diamond segments according to claim 3, wherein said rotary table is provided with a bracket with pulleys, said rotary table resting on said bracket.

7. The automated cold press of diamond segments according to claim 2, wherein said pressing means comprises a support, a ram and a first ram disposed on said support; a flat plate covering all die cavities of the die is arranged at the end part of the first pressure head; and a piston rod of the oil cylinder is connected with the pressure head, and the pressure head corresponds to the die up and down.

8. The automatic cold press for diamond segments according to claim 2, wherein said stripping means comprises a support, a second ram disposed on said support, a ram, and a delivery mechanism; the end part of the pressure head is provided with a demoulding part, and the demoulding part corresponds to the upper die outside the die cavity up and down; and a piston rod of the oil cylinder is connected with the pressure head.

9. The automated cold press for diamond segments according to claim 4, wherein said mold calibration means comprises a jacking mechanism, a height limiting mechanism and a cylinder.

10. The automatic cold press for diamond segments according to claim 9, wherein said pressing mechanism comprises a top bar and a clamping piece, one end of said top bar presses against the bottom surface of the upper die of said die, the other end of said top bar is connected with the piston rod of said oil cylinder, and said top bar is arranged on said circular track through said clamping piece; the height limiting mechanism comprises a fixed bearing, and the end face of the bearing is abutted against the top surface of the upper die of the die.