Multi-layer servo large powder forming machine

Abstract

The invention relates to a multi-layer servo large powder forming machine which comprises a machine frame, a main oil cylinder, a top cylinder and a die frame, the die frame comprises an upper punch installation part, a lower punch installation part, a female die plate, a core rod connecting rod, an upper die plate, a lower die plate and a servo oil cylinder, and the upper punch installation part comprises a first upper die plate, a second upper die plate and a third upper die plate; the lower punch mounting part comprises a fixed template, a first lower template, a second lower template, a third lower template, a first lower template, a second lower template, a third lower template and a fixed template, the four templates are sequentially and slidably mounted on the four lower guide columns from top to bottom, the two sides of the fixed template are fixedly mounted on the inner side of the rack, and a plurality of servo oil cylinders are mounted on the fixed template. The invention has the advantages that the high-precision servo oil cylinder is used as a driving source of the floating template, so that the requirement of equal compression ratio during forming of a multi-step product is easily met, and the defects of layering, cracks and the like caused by unequal compression ratio during forming of the product are overcome.

Description

Technical Field

[0001] The invention relates to the field of dielectric ceramic filter molding machinery, in particular to a multi-layer servo large-scale powder molding machine. Background Art

[0002] At present, there are two forms of powder forming machines: one is a mechanical powder forming machine, and the other is a hydraulic forming machine. They are driven by a crankshaft cam mechanism and a cylinder linear drive respectively. The mold frame connected to the mold has multi-axis linkage (Note: one movable template is one axis) and a series single-axis circulation method. The molding of the mechanical press adopts multi-axis linkage, which has the advantages of high efficiency and stable size of batch pressed products. But at the same time, it has the disadvantages of short continuous pressing time and low powder filling height; at present, most of the hydraulic press molding adopts a single-axis molding method, which is inefficient. Because the pressed product is affected by oil temperature and hydraulic fluctuations, the product size error is large. Due to the large stroke of the hydraulic press, the powder filling height is much larger than the powder filling height of the mechanical press, and the holding time can be set by itself. It can be fully exhausted during the product molding process, and it is not easy to expand and crack during sintering. When comparing the costs of the two machines with the same pressing tonnage, the mechanical molding machine is several times the manufacturing cost of the hydraulic molding machine due to its complex structure. Summary of the invention

[0003] In order to solve the above technical problems, the present invention proposes a multi-layer servo large-scale powder forming machine, which has ingenious design, reasonable and compact structure, stable equipment operation, high efficiency, and its performance fully meets the product forming requirements.

[0004] The technical solution of the present invention: A multi-layer servo large-scale powder forming machine, which includes a frame, a main oil cylinder, a top cylinder, and a mold frame. The frame is an integral frame type and is designed to be symmetrical in front and back and left and right. The frame includes an upper beam and a lower beam. The main oil cylinder is installed in the middle of the upper beam, and the top cylinder is installed in the middle of the lower beam. A slot for installing the mold frame is opened in the middle of the frame. The mold frame includes an upper die punch mounting part, a lower die punch mounting part, a female die plate, a core rod connecting rod, an upper die plate, a lower die plate, and a servo oil cylinder. The upper die punch mounting part includes an upper die plate, an upper second die plate, and an upper third die plate. An upper guide column is installed at each of the four corners of the upper end of the female die plate. The four corners of the upper die plate, the upper third die plate, the upper second die plate, and the upper die plate are correspondingly installed on the four upper guide columns from top to bottom in sequence. The middle of the upper end of the upper die plate is connected to the lower telescopic end of the main oil cylinder. Four servo oil cylinders are symmetrically installed on the upper plane of the upper die plate to control the extension of the upper second die plate and the upper third die plate; the lower ends of two servo oil cylinders After penetrating the upper template, it is fixedly connected to the two sides of the upper three templates, and the lower ends of the remaining two servo cylinders respectively penetrate the upper template and the upper three templates and are fixedly connected to the two sides of the upper second template; the lower end of the female template is connected to the two sides of the upper end of the lower template through two lower guide pillars on both sides; the middle of the lower end of the lower template is connected to the upper telescopic end of the top cylinder; the lower die punch installation part includes a fixed template, a next template, a lower second template, a lower third template, a next template, a lower second template, a lower third template and a fixed template, and the four templates are slidably installed on the four lower guide pillars from top to bottom in sequence, and the two sides of the fixed template are fixedly installed on the inner side of the frame, and a number of servo cylinders are installed on the fixed template, and the servo cylinders are grouped in two and respectively connect to the corresponding next template, the lower second template, and the lower third template after penetrating the upper template; a lower center cylinder is installed in the middle of the upper end of the lower template, and the upper end of the lower center cylinder is connected to the core rod connecting rod.

[0005] A rectangular slot hole is designed in the middle of the frame and runs through the front and back. A crossbeam is installed near the upper end of the rectangular slot hole. A step is respectively arranged on both sides of the middle of the rectangular slot hole, and both sides of the fixed template are respectively installed on the steps.

[0006] The lower end of the main oil cylinder is also equipped with a main shaft adjustment mechanism, which includes an anti-rotation plate, a plane on the anti-rotation plate is connected to the lower end of the large piston rod of the main oil cylinder, a guide column is respectively installed at the four corners of the anti-rotation plate, and guide sleeves are respectively installed on the corresponding guide columns on the upper beam, and the upper ends of the guide columns slide in the corresponding guide sleeves; a worm gear assembly is installed at the lower end of the anti-rotation plate, the upper end of the main shaft is located in the middle of the worm wheel, and the outer side of the main shaft is spirally matched with the middle worm wheel of the worm gear assembly; a hole is opened in the middle of the anti-rotation plate for the upper end of the main shaft to pass through, and a hole is also reserved at the lower end of the large piston rod of the main oil cylinder for the top end of the main shaft to extend and retract; the lower end of the main shaft slides through the middle of the crossbeam, and a guide sleeve for the main shaft to slide through is installed on the crossbeam; the lower end of the main shaft is connected to the middle position of the upper end of the upper template.

[0007] The main oil cylinder comprises a large cylinder body, a large piston head, a large piston rod, a small cylinder body, a small piston head, a small piston rod, a valve seat, and a filling valve. The large piston head is slidably installed in the middle of the large cylinder body, and one end of the large piston head is connected to the large piston rod. The large piston rod and the large piston head are integrally formed. One end of the large piston rod slides and seals through one end of the large cylinder body, and an inlet and outlet oil channel is designed near the end position inside the large cylinder body. The outer side of the inlet and outlet oil channel is connected to the outer peripheral surface of the large cylinder body, and the inner side of the inlet and outlet oil channel is connected to the interior of the large cylinder body. A circular hole is opened at the other end of the large cylinder body, and a valve seat is installed at the mouth of the circular hole. The middle of the other end of the large piston head is designed as a small cylinder body, and a small piston head is slidably installed in the small cylinder body. One end of the small piston head is connected to one end of the small piston rod, and the other end of the small piston rod is connected to the inner side of the valve seat, and the filling valve is installed on the outer side of the valve seat; two L-shaped flow channels are designed in the valve seat, and one end of the two L-shaped flow channels are connected to the inner end surface of the valve seat and The other end is connected to the outer circumferential surface of the valve seat; the small piston rod and the small piston head are integrally formed, and two axial flow channels are designed in the middle of the small piston rod, and both axial flow channels are connected at both ends; one end of one axial flow channel is connected to the end face of the small piston head and the other end is connected to an L-shaped flow channel of the valve seat; one end of the other axial flow channel is blocked with the end face of the small piston head and the other end is connected to another L-shaped flow channel of the valve seat. At the same time, a radial flow channel is also provided on one side of the axial flow channel, one end of the radial flow channel is connected to the outside of the root where the small piston rod is connected to the small piston head, and the radial flow channel is connected to the axial flow channel; a valve cavity is opened in the middle of the outer end of the valve seat, and the filling valve is sealed and installed at the valve cavity mouth. One side of the valve cavity is connected to the outer circumferential surface of the valve seat through a main oil inlet flow channel, and the bottom of the valve cavity is connected to the inner end face of the valve seat through two oil channels; the large piston head and the interior of the large cylinder body are in sliding seal cooperation; the small piston head and the interior of the small cylinder body are in sliding seal cooperation.

[0008] The hydraulic oil cylinder also includes a large guide sleeve, a large locking nut, a small guide sleeve, and a small locking nut. The outer peripheral surface of the large cylinder body is designed with a sealing ring groove, and one end of the large cylinder body is designed with an annular step and the inner wall of the annular step is provided with an internal thread. An annular boss is designed on the outer periphery of one end of the large guide sleeve. The large guide sleeve is installed on the inner side of the mouth of the large cylinder body and a sealing ring is installed between the large guide sleeve and the large cylinder body. The sealing ring is located in the sealing ring groove, and the annular boss is pressed on the end face of the annular step. The large locking nut is screwed into the internal thread of the annular step to lock the large guide sleeve; an annular groove is provided on the inner side of one end of the large guide sleeve, and the large piston rod slides through the large guide sleeve. A sealing ring is installed between the large guide sleeve and the large piston rod. In the annular groove; the outer circumferential surface of the small cylinder body is designed with multiple sealing ring grooves, one end of the small cylinder body is designed with an annular step and the inner wall of the annular step is set with an internal thread, one end of the small guide sleeve is designed with an annular boss, the small guide sleeve is installed on the inner side of the mouth of the small cylinder body and a number of sealing rings are installed between the small guide sleeve and the small cylinder body, the several sealing rings are located in the multiple sealing ring grooves, the annular boss is pressed on the end face of the annular step, and the small locking nut is screwed into the internal thread of the annular step to lock the small guide sleeve; a plurality of annular grooves are provided on the inner side of one end of the small guide sleeve, the small piston rod slides through the small guide sleeve, a number of sealing rings are installed between the small guide sleeve and the small piston rod, and the sealing rings are installed in the corresponding annular grooves.

[0009] The top cylinder is a double-axis extension top cylinder, and a limiting device is installed at the lower end of the lower extension rod of the top cylinder. It includes a push-pull cylinder, a lower pad, a slide rail, an upper pad, and a top cylinder height adjustment mechanism. The top cylinder height adjustment mechanism is installed below the lower extension rod of the top cylinder, and an upper pad is installed at the lower end of the lower extension rod of the top cylinder. The top cylinder height adjustment mechanism includes a support plate, a slide rail is installed on the support plate, and the lower pad is slidably installed on the slide rail. The push-pull cylinder is installed on one side of the support plate, and the telescopic end of the push-pull cylinder is connected to one side of the lower pad. The upper end face of the lower pad is designed to be an upper inclined surface that sinks away from one side of the push-pull cylinder, and the lower end face of the upper pad is designed to be a lower inclined surface, and the lower inclined surface is beveled to match the upper inclined surface; the inclination angle of the upper inclined surface is 4 degrees.

[0010] A front proximity switch and a rear proximity switch are arranged on one side of the push-pull cylinder, and the front proximity switch and the rear proximity switch are respectively installed on the support plate with a certain distance between them; a transverse plate and a bump block are installed on one side of the lower pad, one end of the transverse plate is installed on one side of the lower pad near the rear end, and the other end of the transverse plate is located on the rear side of the lower pad, and a bump block is installed on the other end of the transverse plate, and the bump block cooperates with the front proximity switch and the rear proximity switch respectively.

[0011] The top cylinder height adjustment mechanism also includes a worm wheel, a worm, a driving motor, a lifting sleeve, a support sleeve and a support. The support sleeve is installed at the lower end of the support plate, the support is installed at the lower end of the support sleeve, and the lifting sleeve is installed in the support sleeve. The outer side of the lifting sleeve is designed with an external thread, and the inner side of the worm wheel is designed with an internal thread. The worm wheel is rotatably installed on the outer side of the lifting sleeve and the worm wheel can be rotatably located in the middle position of the support sleeve. The worm is rotatably installed on one side of the support sleeve and the worm is meshed with the worm wheel; the driving motor is located on the outer side of the support sleeve and the driving motor drives one end of the worm; a guide column is respectively installed on both sides of the support plate, a connecting plate is installed at the lower end of the lower extension rod of the top cylinder, an upper pad is installed in the middle of the lower end of the connecting plate, and a guide sleeve is designed and installed on both sides of the connecting plate respectively, and the upper ends of the two guide columns are correspondingly slidably installed in the guide sleeve.

[0012] The multi-layer servo large-scale powder molding machine also includes a molding mechanism, which includes a cantilever, a lifting rod, a pulley, a reduction motor, and a mold removal tooling. A pulley is installed near the top on one side of the front side of the frame, and two sliding sleeves are designed below the pulley. One of the two sliding sleeves is installed at the upper middle position of the frame and the other is installed at the lower middle position of the frame. An annular protrusion is designed near the lower end of the lifting rod, and the upper and lower ends of the lifting rod are respectively slidably inserted in the two sliding sleeves, and the annular protrusion of the lifting rod is supported on the upper part of the sliding sleeve below. A reduction motor is installed on one side of the lower end of the frame, and the reduction motor controls the steel wire rope to bypass the pulley through a drum and then tow and connect the upper end of the lifting rod. One end of the cantilever is rotatably connected to the lifting rod and the cantilever is located above the annular protrusion of the lifting rod, and the other end of the cantilever is rotatably connected to the rear end of the mold removal tooling, a pulley is rotatably installed below the front end of the mold removal tooling, and a winch is installed below the rear end of the mold removal tooling, and the winch bypasses the pulley through the steel wire rope to tow and lift the female mold.

[0013] The demoulding tooling includes a demoulding plate, the rear end of which is rotatably connected to the front end of the cantilever through a shaft sleeve, a winch is installed on the rear side of the shaft sleeve, the front end of the demoulding plate is designed as a large circular ring, a pulley is installed on both sides or one side of the lower end of the large circular ring, and the winch passes through the pulley on the corresponding side with a steel wire rope and is connected to a lifting bolt, and the lifting bolt can be rotatably connected to the threaded hole reserved on the female mold.

[0014] The advantages of the present invention are: Since a high-precision servo cylinder is used as the driving source of the floating template, it is easy to achieve the requirement of equal compression ratio when forming multi-step products, and solve the defects such as delamination and cracks caused by unequal compression ratios during product forming. The speed of the servo cylinder can be set with high precision through the touch screen; When the main oil cylinder is running without load, the oil is introduced into the small cylinder to change the running speed of the large piston rod. Under the rated flow rate, the volume of the working chamber of the small cylinder is inversely proportional to the running speed of the large piston rod. By changing the oil cylinder structure, the oil cylinder has a significantly improved working efficiency in actual use without increasing the flow rate, and saves users the purchase cost and the user's use cost. The top cylinder adopts a limit device different from the traditional mechanical one. The upper and lower pads have two force contact surfaces with an incline of less than 4 degrees. When the lower pad leaves the upper external carrier laterally under external load pressure, the vibration caused by sudden departure is avoided. The final molding height of the product can be adjusted and determined by the spindle adjustment mechanism; the spindle adjustment mechanism can also prevent the mold from being crushed due to empty mold operation; when the upper punch is connected for mold adjustment, the upper punch should be raised in advance, which is safe and reliable; The mold loading mechanism is designed to be installed on the front side of the machine body. The female mold is pulled by the reducer, which can conveniently lift the female mold from the ground to the female mold plate, or conveniently put the female mold on the female mold plate on the ground; the cantilever rotates along the lifting rod, the lifting rod is pulled by the wire rope, and the reduction motor rotates to pull the wire rope to lift the lifting rod through the pulley; the front end of the cantilever is connected to the mold removal tooling by the connecting shaft, and the reduction motor on the mold removal tooling pulls the wire rope to lift the female mold around the pulley, and the mold removal tooling rotates along the front end connecting shaft of the cantilever, so as to conveniently send the female mold to be installed to the installation hole of the female mold plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the present invention.

[0016] Figure 2 It is a schematic diagram of a mold frame of the present invention.

[0017] Figure 3 It is a partially enlarged schematic diagram of the spindle adjustment mechanism of the present invention.

[0018] Figure 4 It is a bottom view schematic diagram of the spindle adjustment mechanism of the present invention.

[0019] Figure 5 It is a schematic diagram of the master cylinder of the present invention.

[0020] Figure 6 It is a schematic diagram of the limiting device below the top cylinder of the present invention.

[0021] Figure 7 It is a side view schematic diagram of the limiting device below the top cylinder of the present invention.

[0022] Figure 8 It is a top view of the lower pad of the limiting device below the top cylinder of the present invention.

[0023] Fig. 9It is a schematic diagram of the mold loading mechanism of the present invention.

[0024] Fig.10 It is a partially enlarged schematic diagram of the mold loading mechanism of the present invention.

[0025] Fig.11 It is a partial top view of the mold loading mechanism of the present invention. DETAILED DESCRIPTION

[0026] See attached Figure 1-11 , a multi-layer servo large powder forming machine, which includes a frame 100, a main oil cylinder 200, a top cylinder 300, and a mold frame 400. The frame 100 is an integral frame type and is designed to be symmetrical in front and back and left and right. The frame 100 includes an upper beam and a lower beam. The main oil cylinder 200 is installed in the middle of the upper beam, and the top cylinder 300 is installed in the middle of the lower beam. A slot for installing the mold frame 400 is opened in the middle of the frame 100. The mold frame 400 includes an upper die punch mounting part, a lower die punch mounting part, a female mold plate 405, a core rod connecting rod 414, an upper mold plate 404, a lower mold plate 412, and a servo oil cylinder 407. The upper die punch mounting part includes an upper mold plate 401, An upper guide column 408 is installed at each of the four corners of the upper second template 402, the upper third template 403, and the female template 405. The four corners of the upper template 404, the upper third template 403, the upper second template 402, and the upper template 401 are slidably installed on the four upper guide columns 408 from top to bottom. The middle of the upper end of the upper template 404 is connected to the lower telescopic end of the main cylinder 200. Four servo cylinders 407 are symmetrically installed on the upper plane of the upper template 404 to control the extension of the upper second template 402 and the upper third template 403; two of the servo cylinders 407 are installed at the lower end of the upper template 404. The lower end of the female template 405 passes through the upper template 404 and is fixedly connected to the two sides of the upper three templates 403. The lower ends of the remaining two servo cylinders 407 pass through the upper template 404 and the upper three templates 403 and are fixedly connected to the two sides of the upper second template 402; the lower end of the female template 405 is connected to the two sides of the upper end of the lower template 412 through two lower guide pillars 415 on both sides; the middle of the lower end of the lower template 412 is connected to the upper telescopic end of the top cylinder 300; the lower die punch installation part includes a fixed template 411, a lower template 408, a lower second template 409, and a lower third template 410, and the lower template 408, the lower The second template 409, the lower third template 410 and the fixed template 411, the four templates are slidably installed on the four lower guide pillars 415 from top to bottom in sequence, the fixed template 411 is fixedly installed on the inner side of the frame 100 on both sides, and a plurality of servo cylinders 407 are installed on the fixed template 411. The servo cylinders 407 are grouped in two and correspond to the templates that pass through the upper end and are connected to the corresponding next template 408, the lower second template 409, and the lower third template 410; the lower template 412 is installed with a lower center cylinder 413 in the middle of the upper end, and the upper end of the lower center cylinder 413 is connected to the core rod connecting rod 414.

[0027] The female mold plate 405 is connected to the female mold, and the feeding mechanism is installed on the female mold plate 405. The design of the feeding mechanism belongs to the prior art, and this application briefly describes it.

[0028] Upper punches are installed respectively under the upper template, upper third template, upper second template and upper template, the upper punch of the upper template slides in the middle of the upper punches of the upper three templates, the upper punch of the upper third template slides in the middle of the upper punches of the upper second templates, and the upper punch of the upper second template slides in the middle of the upper punch of the upper template; a female mold is installed in the middle of the female template; lower punches are installed respectively on the fixed template, the next template, the next second template and the next third template, the core plate connecting rod is located between the fixed templates and its upper end slides in the lower punch of the next three templates, the lower punch of the next three templates slides in the middle of the lower punch of the next two templates, the lower punch of the next two templates slides in the middle of the lower punch of the next template, and the lower punch of the next template slides in the middle of the female mold of the female template. Before closing the mold, the four upper punches and the four lower punches are floating. When the powder raw material needs to be put in, several lower punches are driven upward by the next three templates. Each template is pushed by two groups of servo cylinders. Several lower punches move upward together with the female mold and the internal core rod to form the lower mold material chamber, and the feeding mechanism sends the powder to the lower mold material chamber; when closing the mold, the servo cylinder group controls the upper three templates and the upper two templates to move downward respectively, and all the upper punches form a precise upper punch assembly. The upper punch assembly is pressed into the lower mold material chamber to extrude the powder, maintain pressure, and then open the mold. The upper punches of the upper punch assembly move upward and reset in turn, and the related lower punches of the lower mold material chamber are reset in turn by the servo cylinder to control the corresponding templates. The upper two and upper three templates in the present invention are floating templates, and the next three templates are also floating templates, which are controlled and operated by servo cylinders respectively. The number of floating templates can be designed according to actual needs, and the floating pressing of the product pressing process is controlled to meet the pressing requirements of precise and complex products. The top cylinder controls the synchronous lifting and lowering of the lower template and the female template, the main oil cylinder controls the upper template and the three templates from the top to the top to move synchronously, and the fixed template is installed on the frame and will not move.

[0029] The frame 100 is designed with a rectangular slot extending from front to back in the middle, a crossbeam 103 is installed near the upper end of the rectangular slot, a step is provided on both sides of the middle of the rectangular slot, and both sides of the fixed template 411 are installed on the steps. The frame is an integral frame type, symmetrical in front and back and left and right directions, and the main force direction of the frame coincides with the center line of the molding machine of the present invention. The frame design adopts finite element force analysis to ensure that the frame has sufficient rigidity. The frame is welded from steel plates, and high temperature is used to remove welding internal stress after welding. It is processed by high-precision machine tools to ensure the coaxiality of the upper cylinder mounting hole and the verticality with the mold frame mounting surface, so that the frame can meet the performance requirements of the molding machine of the present invention during use. A notch is reserved on the crossbeam for the upper servo cylinder to avoid, which is a safety design. The present invention is briefly described.

[0030] The main oil cylinder 200 is also provided with a main shaft adjustment mechanism 500 at the lower end thereof, and the main shaft adjustment mechanism 500 includes an anti-rotation plate 501, the upper plane of the anti-rotation plate 501 is connected to the lower end of the large piston rod 203 of the main oil cylinder 200, and a guide column is respectively provided at the four corners of the anti-rotation plate 501, and guide sleeves are respectively provided on the corresponding guide columns on the upper beam 101, and the upper ends of the guide columns are slidably located in the corresponding guide sleeves; a worm gear assembly 502 is provided at the lower end of the anti-rotation plate 501, and the upper end of the main shaft 503 is located at the worm gear assembly 502. The middle of the wheel and the outer side of the main shaft 503 are spirally matched with the middle of the worm wheel of the worm gear assembly 502; a hole is opened in the middle of the anti-rotation plate 501 for the upper end of the main shaft 503 to pass through, and the lower end of the large piston rod of the main oil cylinder 200 is also reserved with a hole for the top end of the main shaft 503 to extend and retract; the lower end of the main shaft 503 slides through the middle of the crossbeam 103, and a guide sleeve is installed on the crossbeam 103 for the main shaft 503 to slide through; the lower end of the main shaft 503 is connected to the middle position of the upper end of the upper template 404.

[0031] It adopts four-corner four-guide column guidance, and the guide sleeve is connected to the frame to prevent the large piston rod from rotating when it is under liquid pressure. The lower plane is connected to the worm gear reduction motor. When the upward punch descends and enters the female mold to press the product, the piston rod descends until it is pressed down to the main cylinder limit. The final forming height of the product is adjusted and determined by the spindle adjustment mechanism 500. The forming limit of the product is that the main cylinder piston presses on the cylinder mouth gasket. The adjustment of the spindle 503 adopts the spiral lifting adjustment principle. The spindle 503 and the worm gear of the worm gear reduction motor are spirally matched. The motor rotates the worm to drive the worm gear, so that the spindle 503 moves up and down. The up and down stroke of the spindle 503 is set by the touch screen. The spindle 503 guide sleeve is connected to the center of the crossbeam of the frame. The spindle 503 and the guide sleeve are slidably matched to ensure that the spindle 503 is stable when under pressure. The lower end of the spindle 503 is connected to the upper mold plate 404 of the mold frame 400, and two through pins are used between the two parts to prevent rotation and position. The worm gear reduction motor includes a housing, a worm, a worm wheel, a motor, etc., which are installed on the lower plane of the anti-rotation plate 501. The motor drives the worm to rotate, and the worm acts on the worm wheel to rotate. The rotation of the worm wheel makes the worm wheel rotate. Another function of the spindle adjustment mechanism 500 is to prevent the mold from being crushed due to empty mold operation. At the beginning of connecting the upper punch for mold adjustment, the upper punch must be pulled up in advance. According to the lubrication requirements of the friction pair, the friction surface of the guide column and the guide sleeve can be lubricated through the oil filling hole to prevent the matching surface from being damaged due to friction heating and affecting the machine accuracy.

[0032] The master oil cylinder 200 includes a large cylinder body 201, a large piston head 202, a large piston rod 203, a small cylinder body 204, a small piston head 205, a small piston rod 206, a valve seat 207, and a filling valve 208. The large piston head 202 is slidably installed in the middle of the large cylinder body 201, and one end of the large piston head 202 is connected to the large piston rod 203. The large piston rod 203 and the large piston head 202 are integrally formed. One end of the large piston rod 203 slides and seals through one end of the large cylinder body 201, and an inlet and outlet oil channel 209 is designed inside the large cylinder body 201 near the end position. The outer side of the oil outlet passage 209 is connected to the outer peripheral surface of the large cylinder body 201, and the inner side of the oil inlet and outlet passage 209 is connected to the interior of the large cylinder body 201. A round hole is opened at the other end of the large cylinder body 201 and a valve seat 207 is installed at the mouth of the round hole. The middle of the other end of the large piston head 202 is designed as a small cylinder body 204. A small piston head 205 is slidably installed in the small cylinder body 204. One end of the small piston head 205 is connected to one end of the small piston rod 206, and the other end of the small piston rod 206 is connected to the inner side of the valve seat 207. The filling valve 208 is installed on the outer side of the valve seat 207; two L-shaped valves are designed in the valve seat 207. The small piston rod 206 and the small piston head 205 are integrally formed, and two axial flow channels 211 are designed in the middle of the small piston rod 206. Both axial flow channels 211 are connected at both ends; one end of one axial flow channel 211 is connected to the end face of the small piston head 205 and the other end is connected to an L-shaped flow channel 210 of the valve seat 207; one end of the other axial flow channel 211 is blocked with the end face of the small piston head 205 and the other end is connected to the outer peripheral surface of the valve seat 207 Another L-shaped flow channel 210 is connected, and at the same time, a radial flow channel 2111 is also provided on one side of the axial flow channel 211, one end of the radial flow channel 2111 is connected to the outside of the root where the small piston rod 206 is connected to the small piston head 205, and the radial flow channel 2111 is connected to the axial flow channel 211; a valve cavity 212 is opened in the middle of the outer end of the valve seat 207, and the filling valve 208 is sealed and installed at the mouth of the valve cavity 212, one side of the valve cavity 212 is connected to the outer peripheral surface of the valve seat 207 through a main oil inlet flow channel 271, and the bottom of the valve cavity 212 is connected to the inner end surface of the valve seat 207 through two oil channels 2120.

[0033] The large piston head 202 is in sliding and sealing cooperation with the inside of the large cylinder body 201 ; the small piston head 205 is in sliding and sealing cooperation with the inside of the small cylinder body 204 .

[0034] The hydraulic oil cylinder also includes a large guide sleeve 213, a large locking nut 214, a small guide sleeve 215, and a small locking nut 216. The outer peripheral surface of the large cylinder body 201 is designed with a sealing ring groove, and one end of the large cylinder body 201 is designed with an annular step and the inner wall of the annular step is provided with an internal thread. An annular boss is designed on the outer periphery of one end of the large guide sleeve 213. The large guide sleeve 213 is installed on the inner side of the mouth of the large cylinder body 201 and a sealing ring is installed between the large guide sleeve 213 and the large cylinder body 201. The sealing ring is located in the sealing ring groove, and the annular boss is pressed on the end face of the annular step. The large locking nut 214 is screwed into the internal thread of the annular step to lock the large guide sleeve 213; an annular groove is provided on the inner side of one end of the large guide sleeve 213, and the large piston rod 203 slides through the large guide sleeve 213, and a sealing ring is installed between the large guide sleeve 213 and the large piston rod 203. , the sealing ring is installed in the annular groove; the outer circumferential surface of the small cylinder body 204 is designed with multiple sealing ring grooves, one end of the small cylinder body 204 is designed with an annular step and the inner wall of the annular step is set with an internal thread, and an annular boss is designed on the outer circumference of one end of the small guide sleeve 215, the small guide sleeve 215 is installed on the inner side of the mouth of the small cylinder body 204 and a number of sealing rings are installed between the small guide sleeve 215 and the small cylinder body 204, the several sealing rings are located in the multiple sealing ring grooves, the annular boss is pressed on the end face of the annular step, and the small locking nut 216 is screwed into the internal thread of the annular step to lock the small guide sleeve 215; a plurality of annular grooves are provided on the inner side of one end of the small guide sleeve 215, the small piston rod 206 slides through the small guide sleeve 215, and a number of sealing rings are installed between the small guide sleeve 215 and the small piston rod 206, and the sealing rings are installed in the corresponding annular grooves.

[0035] When the master oil cylinder of the present invention is used, first the large piston rod moves downward under load, oil is introduced into the main oil inlet channel on one side of the valve seat, enters the valve cavity, and then enters the cavity between the end of the large piston head and the bottom of the large cylinder body through the two oil channels at the bottom of the valve cavity, and the inlet and outlet oil channels discharge the hydraulic oil between the large piston head and the other end of the large cylinder body, and at the same time an L-shaped channel on one side of the valve seat also starts to supply oil, the L-shaped channel transports the hydraulic oil to the cavity between the end of the small piston head and the bottom of the small cylinder body through the axial channel, the radial oil channel discharges the hydraulic oil between the small piston head and the other end of the small cylinder body, and discharges it into another L-shaped channel through another axial channel, and finally discharges it to the oil tank; the large cylinder body and the small cylinder body are simultaneously supplied with oil to increase the oil intake amount, and the downward pressure of the oil cylinder can be increased without increasing the diameter (volume) of the large oil cylinder; when the large piston rod moves upward for a return stroke During operation, it is no-load operation, which can increase the upward speed. First, the filling valve is opened, and an L-shaped flow channel begins to supply oil, which is transported to the small guide sleeve between the small piston head and the small cylinder body through the axial flow channel and the radial flow channel. The other axial flow channel discharges the hydraulic oil between the small piston head and the bottom of the small cylinder body through another L-shaped flow channel; at this time, the inlet and outlet oil channels begin to supply oil to the space between the large guide sleeve and the large piston head, and the hydraulic oil head between the large piston head and the bottom of the large cylinder body is discharged into the valve cavity through the oil channel of the valve seat, and the valve cavity is quickly depressurized through the filling valve. The flow rate of the filling valve is greater than the flow rate of the main oil inlet flow channel. The main oil inlet flow channel can return oil as needed, or it can remain motionless; without increasing the diameter of the oil return pipe of the cylinder, it is achieved that the upward movement can be fast when the displacement is increased, saving time, improving work efficiency, and saving energy.

[0036] The described top cylinder 300 is a double-axis extension top cylinder. The lower end of the lower extension rod 1 of the top cylinder 300 is installed with a limiting device. The limiting device includes a push-pull oil cylinder 2, a lower pad 3, a slide rail 4, an upper pad 5, and a top cylinder height adjustment mechanism. The top cylinder height adjustment mechanism is installed below the lower extension rod 1 of the top cylinder. The lower end of the lower extension rod 1 of the top cylinder is installed with an upper pad 5. The top cylinder height adjustment mechanism includes a support plate 6. The slide rail 4 is installed on the support plate 6. The lower pad 3 is slidably installed on the slide rail 4. The push-pull oil cylinder 2 is installed on one side of the support plate 6. The telescopic end of the push-pull oil cylinder 2 is connected to one side of the lower pad 3. The upper end face of the lower pad 3 is designed to be an upper inclined surface that sinks away from one side of the push-pull oil cylinder 2. The lower end face of the upper pad 5 is designed to be a lower inclined surface. The lower inclined surface is beveled with the upper inclined surface. The upper inclined surface has an inclination angle of 4 degrees. The lower inclined surface is also 4 degrees. They cooperate with each other to meet the condition of sufficient vertical support force and better slow release to avoid vibration. A front proximity switch 7 and a rear proximity switch 8 are provided on one side of the push-pull oil cylinder 2. The front proximity switch 7 and the rear proximity switch 8 are respectively installed on the support plate 6 and a certain distance is left between the front proximity switch 7 and the rear proximity switch 8; a transverse plate 9 and a bumper block 10 are installed on one side of the lower pad 3. One end of the transverse plate 9 is installed on one side of the lower pad 3 near the rear end, and the other end of the transverse plate 9 is located at the rear side of the lower pad 3. A bumper block 10 is installed on the other end of the transverse plate 9. The bumper block 10 cooperates with the front proximity switch 7 and the rear proximity switch 8 respectively. The front and rear proximity switches cooperate with the bumper block design to control the push-pull oil cylinder to move the lower pad to a set distance. The height adjustment mechanism of the top cylinder also includes a worm wheel 11, a worm 12, a drive motor 13, a lifting sleeve 14, a support sleeve 15 and a support 16. The support sleeve 15 is installed at the lower end of the support plate 6, and the support 16 is installed at the lower end of the support sleeve 15. The lifting sleeve 14 is installed in the support sleeve 15. The outer side of the lifting sleeve 14 is designed with an external thread, and the inner side of the worm wheel 11 is designed with an internal thread. The worm wheel 11 is rotatably installed on the outer side of the lifting sleeve 14 and the worm wheel 11 can be rotatably located in the middle position of the support sleeve 15. The worm 12 is rotatably installed on one side of the support sleeve 15 and the worm 12 is meshed with the worm wheel 11; the drive motor 13 is located on the outer side of the support sleeve 15 and the drive motor 13 drives one end of the worm 12; a guide column 18 is installed on both sides of the support plate 6, and a connecting plate 17 is installed at the lower end of the lower extension rod 1 of the top cylinder, and an upper pad 5 is installed in the middle of the lower end of the connecting plate 17. A guide sleeve is designed and installed on both sides of the connecting plate 17, and the upper ends of the two guide columns 18 are correspondingly slidably installed in the guide sleeve. The design of the top cylinder height adjustment mechanism is prior art and is briefly described in the present invention. For example, the relevant structure is disclosed in patent CN201811312140.7.

[0037] When the top cylinder of the present invention is used, after the parts are formed, the push-pull cylinder contracts to control the lower pad to slide to one side along the slide rail. The contact surface of the lower pad and the upper pad is an inclined surface. In this way, the supporting force is not released suddenly when moving to one side, but is released slowly. The best inclined surface angle designed in the present invention is 4 degrees. Without changing the vertical force, the horizontal force-bearing surface is designed to be a sloped surface with a force of less than 4 degrees, which solves the key problem that the product demoulding support pad is difficult to open or vibrates when opened, and obtains good economic benefits.

[0038] The multi-layer servo large-scale powder molding machine also includes a mold loading mechanism 600, which includes a cantilever 601, a lifting rod 602, a pulley 603, a reduction motor 604, and a mold removal tool 605. A pulley 603 is installed near the top of the front side of the frame 100, and two sliding sleeves 606 are designed below the pulley 603. One of the two sliding sleeves 606 is installed at the upper middle position of the frame 100 and the other is installed at the lower middle position of the frame 100. An annular protrusion 6021 is designed near the lower end of the lifting rod 602. The upper and lower ends of the lifting rod 602 are respectively slidably inserted into the two sliding sleeves 606, and the annular protrusion 602 of the lifting rod 602 1 is supported above the sliding sleeve 606 below, and a reduction motor 604 is installed on one side of the lower end of the frame 100. The reduction motor 604 controls the steel wire rope to bypass the pulley 603 through the drum and then pulls and connects to the upper end of the lifting rod 602. One end of the cantilever 601 is rotatably connected to the lifting rod 602 and the cantilever 601 is located above the annular protrusion 6021 of the lifting rod 602. The other end of the cantilever 601 is rotatably connected to the rear end of the mold-lifting tool 605. A pulley 6031 is rotatably installed below the front end of the mold-lifting tool 605. A winch 607 is installed below the rear end of the mold-lifting tool 605. The winch 607 bypasses the pulley 6031 through the steel wire rope and then pulls and hoists the female mold.

[0039] The demolding tooling 605 includes a demolding plate 6051, the rear end of which is rotatably connected to the front end of the cantilever 601 through a sleeve, and a winch 607 is installed on the rear side of the sleeve. The front end of the demolding plate 6051 is designed to be a large circular ring 6052, and a pulley 6031 is installed on both sides or one side of the lower end of the large circular ring 6052. The winch 607 passes through the pulley 6031 on the corresponding side through a steel wire rope and is connected to a lifting bolt 608. The lifting bolt 608 can be rotatably connected to the threaded hole reserved on the female mold.

[0040] The mold loading mechanism: when the female mold is connected to the mold frame and the female mold is disassembled, the installation and disassembly are unsafe because the female mold is heavy. When the mold loading mechanism of the present invention is used, the wire rope is pulled by the winch to connect the eye bolt, the eye bolt is tightened and connected to the top of the female mold, and the winch is wound to lift the female mold. After reaching a certain height, the lifting plate and the cantilever can be rotated to control the lifting of the female mold to the top of the female mold. If the height is not enough, the wire rope can be wound by the reduction motor through the drum to pull the lifting rod to rise, so that the cantilever is lifted by the annular protrusion, and the cantilever with the front end of the lifting plate and the female mold lifted by the lifting plate is further raised to a certain height, so that the rotating lifting plate and the cantilever control the female mold to smoothly enter the installation hole of the female mold. It is simple, convenient, safe and reliable; when disassembling and replacing the female mold, the above operation can be reversed.

[0041] The large-tonnage molding equipment of the present invention realizes the molding of powder metallurgy structural parts with high efficiency, high precision and high consistency. The general automatic process actions of the machine are described as follows: 1) Loading process: When the main oil cylinder returns to the starting position of the material box, the electric cylinder controls the material box to push the formed product out of the female mold mouth, and the top cylinder pushes the female mold up to the filling position. At the same time, the punches on the upper and lower floating templates move to the filling position, and the material box fills the center of the female mold. The material box returns to the initial position and scrapes the female mold surface flat. This is drop-in filling. If the electric cylinder controls the material box to push the formed product out, the material box stays in the center of the female mold, the top cylinder pushes it out, and the female mold rises with the top cylinder to the filling position. At the same time, the powder fills the female mold. This is suction filling. The filling method varies depending on the material of the powder.

[0042] 2) Pressurization process: The main oil cylinder goes down quickly or slowly. The upper punch mold starts to compress the powder after entering the female mold. The piston rod of the main oil cylinder runs to the bottom dead point and the compression ends. The pressurization process can be divided into the following three types: Pre-pressurization of the upper die: At the beginning, the upper punch enters the female die, and the female die does not descend together with the upper punch. The upper punch compresses the powder. This stage is called pre-pressurization. Floating pressurization: When the upper die is pre-pressurized, the density of the upper end of the product increases. As the upper die punch moves downward and pressurizes, the friction between the powder and the female die wall continues to increase. The friction overcomes the force of the lower cylinder supporting the female die. The female die and the upper punch descend at the same speed. The lower punch moves relative to the female die. The lower punch pressurizes the bottom surface of the product, and the density of the bottom end of the product increases. This process is called floating pressurization. Final pressurization: The final stage of powder compression, also known as post-pressurization. The upper punch continues to move downward, the female die no longer descends, and the upper punch presses the upper end of the product to increase the density of the upper end of the product. This stage is called final pressurization; 3) Demolding process: After the pressurization of the press machine is completed, the main cylinder maintains the pressure and releases the pressure. At the same time, the main cylinder protects the product with low pressure, ensuring that a constant pressure acts on the product through the upper punch; the lower floating punch begins to balance, and through balance, the upward axial elastic deformation of the lower floating punch due to pressure is reduced, avoiding product cracks caused by elastic deformation; after the female mold is pulled down, the protective demoulding is completed, and the upper punch returns to the upper floating punch extension setting position with the main cylinder, and the upper floating punch extends out and leaves the upper end surface of the product; the lower center cylinder pulls down the core rod, the lower floating punch pushes the product to the female mold mouth, and the feeding box moves forward to push out the product; the female mold rises, the lower floating punch returns to the set position, and the next product pressing process begins.

Claims

1. Multi-layer servo large powder forming machine, characterized in that, It includes a frame, a main oil cylinder, a top cylinder, and a mold frame. The frame is an integral frame type and is designed to be symmetrical in front and back and left and right. The frame includes an upper beam and a lower beam. The main oil cylinder is installed in the middle of the upper beam, and the top cylinder is installed in the middle of the lower beam. A slot for installing the mold frame is opened in the middle of the frame. The mold frame includes an upper die punch mounting part, a lower die punch mounting part, a female die plate, a core rod connecting rod, an upper die plate, a lower die plate, and a servo oil cylinder. The upper die punch mounting part includes an upper die plate, an upper second die plate, and an upper third die plate. An upper guide column is installed at each of the four corners of the upper end of the female die plate. The four corners of the upper die plate, the upper third die plate, the upper second die plate, and the upper die plate are correspondingly installed on the four upper guide columns from top to bottom in sequence. The middle of the upper end of the upper template is connected to the lower telescopic end of the main cylinder, and four servo cylinders are symmetrically installed on the upper plane of the upper template to control the extension of the upper second template and the upper third template; The lower ends of two of the servo cylinders penetrate the upper template and are fixedly connected to the two sides of the upper three templates, and the lower ends of the remaining two servo cylinders penetrate the upper template and the upper three templates respectively and are fixedly connected to the two sides of the upper two templates; The lower end of the female template is connected to the upper ends of the lower template via two lower guide posts on both sides; The middle of the lower end of the lower template is connected to the upper telescopic end of the top cylinder; The lower die punch installation part includes a fixed template, a next template, a second lower template, a third lower template, a next template, a second lower template, a third lower template and a fixed template. The four templates are slidably installed on four lower guide pillars from top to bottom in sequence. Both sides of the fixed template are fixedly installed on the inner side of the frame. A number of servo cylinders are installed on the fixed template. The servo cylinders are grouped in two and correspond to the templates that pass through the upper end and are connected to the corresponding next template, the second lower template, and the third lower template; a lower center cylinder is installed in the middle of the upper end of the lower template, and the upper end of the lower center cylinder is connected to the core rod connecting rod.

2. The multi-layer servo large powder forming machine according to claim 1, characterized in that: A rectangular slot hole is designed in the middle of the frame and runs through the front and back. A crossbeam is installed near the upper end of the rectangular slot hole. A step is respectively arranged on both sides of the middle of the rectangular slot hole, and both sides of the fixed template are respectively installed on the steps.

3. The multi-layer servo large powder forming machine according to claim 2, characterized in that: The lower end of the main oil cylinder is also equipped with a main shaft adjustment mechanism, which includes an anti-rotation plate, a plane on the anti-rotation plate is connected to the lower end of the large piston rod of the main oil cylinder, a guide column is respectively installed at the four corners of the anti-rotation plate, and guide sleeves are respectively installed on the corresponding guide columns on the upper beam, and the upper ends of the guide columns slide in the corresponding guide sleeves; a worm gear assembly is installed at the lower end of the anti-rotation plate, the upper end of the main shaft is located in the middle of the worm wheel, and the outer side of the main shaft is spirally matched with the middle worm wheel of the worm gear assembly; a hole is opened in the middle of the anti-rotation plate for the upper end of the main shaft to pass through, and a hole is also reserved at the lower end of the large piston rod of the main oil cylinder for the top end of the main shaft to extend and retract; the lower end of the main shaft slides through the middle of the crossbeam, and a guide sleeve for the main shaft to slide through is installed on the crossbeam; the lower end of the main shaft is connected to the middle position of the upper end of the upper template.

4. The multi-layer servo large powder forming machine according to claim 1, characterized in that: The main oil cylinder comprises a large cylinder body, a large piston head, a large piston rod, a small cylinder body, a small piston head, a small piston rod, a valve seat, and a filling valve. The large piston head is slidably installed in the middle of the large cylinder body, and one end of the large piston head is connected to the large piston rod. The large piston rod and the large piston head are integrally formed. One end of the large piston rod slides and seals through one end of the large cylinder body, and an inlet and outlet oil channel is designed near the end position inside the large cylinder body. The outer side of the inlet and outlet oil channel is connected to the outer peripheral surface of the large cylinder body, and the inner side of the inlet and outlet oil channel is connected to the interior of the large cylinder body. A circular hole is opened at the other end of the large cylinder body, and a valve seat is installed at the mouth of the circular hole. The middle of the other end of the large piston head is designed as a small cylinder body, and a small piston head is slidably installed in the small cylinder body. One end of the small piston head is connected to one end of the small piston rod, and the other end of the small piston rod is connected to the inner side of the valve seat, and the filling valve is installed on the outer side of the valve seat; two L-shaped flow channels are designed in the valve seat, and one end of the two L-shaped flow channels are connected to the inner end surface of the valve seat and The other end is connected to the outer circumferential surface of the valve seat; the small piston rod and the small piston head are integrally formed, and two axial flow channels are designed in the middle of the small piston rod, and both axial flow channels are connected at both ends; one end of one axial flow channel is connected to the end face of the small piston head and the other end is connected to an L-shaped flow channel of the valve seat; one end of the other axial flow channel is blocked with the end face of the small piston head and the other end is connected to another L-shaped flow channel of the valve seat. At the same time, a radial flow channel is also provided on one side of the axial flow channel, one end of the radial flow channel is connected to the outside of the root where the small piston rod is connected to the small piston head, and the radial flow channel is connected to the axial flow channel; a valve cavity is opened in the middle of the outer end of the valve seat, and the filling valve is sealed and installed at the valve cavity mouth. One side of the valve cavity is connected to the outer circumferential surface of the valve seat through a main oil inlet flow channel, and the bottom of the valve cavity is connected to the inner end face of the valve seat through two oil channels; the large piston head and the interior of the large cylinder body are in sliding seal cooperation; the small piston head and the interior of the small cylinder body are in sliding seal cooperation.

5. The multi-layer servo large powder forming machine according to claim 4, characterized in that: The hydraulic oil cylinder also includes a large guide sleeve, a large locking nut, a small guide sleeve, and a small locking nut. The outer peripheral surface of the large cylinder body is designed with a sealing ring groove, and one end of the large cylinder body is designed with an annular step and the inner wall of the annular step is provided with an internal thread. An annular boss is designed on the outer periphery of one end of the large guide sleeve. The large guide sleeve is installed on the inner side of the mouth of the large cylinder body and a sealing ring is installed between the large guide sleeve and the large cylinder body. The sealing ring is located in the sealing ring groove, and the annular boss is pressed on the end face of the annular step. The large locking nut is screwed into the internal thread of the annular step to lock the large guide sleeve; an annular groove is provided on the inner side of one end of the large guide sleeve, and the large piston rod slides through the large guide sleeve. A sealing ring is installed between the large guide sleeve and the large piston rod. In the annular groove; the outer circumferential surface of the small cylinder body is designed with multiple sealing ring grooves, one end of the small cylinder body is designed with an annular step and the inner wall of the annular step is set with an internal thread, one end of the small guide sleeve is designed with an annular boss, the small guide sleeve is installed on the inner side of the mouth of the small cylinder body and a number of sealing rings are installed between the small guide sleeve and the small cylinder body, the several sealing rings are located in the multiple sealing ring grooves, the annular boss is pressed on the end face of the annular step, and the small locking nut is screwed into the internal thread of the annular step to lock the small guide sleeve; a plurality of annular grooves are provided on the inner side of one end of the small guide sleeve, the small piston rod slides through the small guide sleeve, a number of sealing rings are installed between the small guide sleeve and the small piston rod, and the sealing rings are installed in the corresponding annular grooves.

6. The multi-layer servo large powder forming machine according to claim 1, characterized in that: The top cylinder is a double-axis extension top cylinder, and a limiting device is installed at the lower end of the lower extension rod of the top cylinder. It includes a push-pull cylinder, a lower pad, a slide rail, an upper pad, and a top cylinder height adjustment mechanism. The top cylinder height adjustment mechanism is installed below the lower extension rod of the top cylinder, and an upper pad is installed at the lower end of the lower extension rod of the top cylinder. The top cylinder height adjustment mechanism includes a support plate, a slide rail is installed on the support plate, and the lower pad is slidably installed on the slide rail. The push-pull cylinder is installed on one side of the support plate, and the telescopic end of the push-pull cylinder is connected to one side of the lower pad. The upper end face of the lower pad is designed to be an upper inclined surface that sinks away from one side of the push-pull cylinder, and the lower end face of the upper pad is designed to be a lower inclined surface, and the lower inclined surface is beveled to match the upper inclined surface; the inclination angle of the upper inclined surface is 4 degrees.

7. The multi-layer servo large powder forming machine according to claim 6, characterized in that: A front proximity switch and a rear proximity switch are arranged on one side of the push-pull cylinder, and the front proximity switch and the rear proximity switch are respectively installed on the support plate with a certain distance between them; a transverse plate and a bump block are installed on one side of the lower pad, one end of the transverse plate is installed on one side of the lower pad near the rear end, and the other end of the transverse plate is located on the rear side of the lower pad, and a bump block is installed on the other end of the transverse plate, and the bump block cooperates with the front proximity switch and the rear proximity switch respectively.

8. The multi-layer servo large powder forming machine according to claim 6, characterized in that: The top cylinder height adjustment mechanism also includes a worm wheel, a worm, a driving motor, a lifting sleeve, a support sleeve and a support. The support sleeve is installed at the lower end of the support plate, the support is installed at the lower end of the support sleeve, and the lifting sleeve is installed in the support sleeve. The outer side of the lifting sleeve is designed with an external thread, and the inner side of the worm wheel is designed with an internal thread. The worm wheel is rotatably installed on the outer side of the lifting sleeve and the worm wheel can be rotatably located in the middle position of the support sleeve. The worm is rotatably installed on one side of the support sleeve and the worm is meshed with the worm wheel; the driving motor is located on the outer side of the support sleeve and the driving motor drives one end of the worm; a guide column is respectively installed on both sides of the support plate, a connecting plate is installed at the lower end of the lower extension rod of the top cylinder, an upper pad is installed in the middle of the lower end of the connecting plate, and a guide sleeve is designed and installed on both sides of the connecting plate respectively, and the upper ends of the two guide columns are correspondingly slidably installed in the guide sleeve.

9. The multi-layer servo large powder forming machine according to claim 1, characterized in that: The multi-layer servo large-scale powder molding machine also includes a molding mechanism, which includes a cantilever, a lifting rod, a pulley, a reduction motor, and a mold removal tooling. A pulley is installed near the top on one side of the front side of the frame, and two sliding sleeves are designed below the pulley. One of the two sliding sleeves is installed at the upper middle position of the frame and the other is installed at the lower middle position of the frame. An annular protrusion is designed near the lower end of the lifting rod, and the upper and lower ends of the lifting rod are respectively slidably inserted in the two sliding sleeves, and the annular protrusion of the lifting rod is supported on the upper part of the sliding sleeve below. A reduction motor is installed on one side of the lower end of the frame, and the reduction motor controls the steel wire rope to bypass the pulley through a drum and then tow and connect the upper end of the lifting rod. One end of the cantilever is rotatably connected to the lifting rod and the cantilever is located above the annular protrusion of the lifting rod, and the other end of the cantilever is rotatably connected to the rear end of the mold removal tooling, a pulley is rotatably installed below the front end of the mold removal tooling, and a winch is installed below the rear end of the mold removal tooling, and the winch bypasses the pulley through the steel wire rope to tow and lift the female mold.

10. The multi-layer servo large powder forming machine according to claim 9, characterized in that: The demoulding tooling includes a demoulding plate, the rear end of which is rotatably connected to the front end of the cantilever through a shaft sleeve, a winch is installed on the rear side of the shaft sleeve, the front end of the demoulding plate is designed as a large circular ring, a pulley is installed on both sides or one side of the lower end of the large circular ring, and the winch passes through the pulley on the corresponding side with a steel wire rope and is connected to a lifting bolt, and the lifting bolt can be rotatably connected to the threaded hole reserved on the female mold.

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