CN2611138Y

CN2611138Y - Powder formation machine

Info

Publication number: CN2611138Y
Application number: CN 02287561
Authority: CN
Inventors: 严培义; 陈伟; 蒋文龙
Original assignee: 严培义; 严培和
Priority date: 2002-11-25
Filing date: 2002-11-25
Publication date: 2004-04-14
Anticipated expiration: 2012-11-25

Abstract

The utility model relates to a powder forming machine which comprises main components such as a bent shaft, a compression cam, a mould unloading cam, a dual-upper-punch mechanism, upper punches, a negative mold, a first lower punch plate, a second punch plate, a punch fixing seat, a pressure bar, a mold unloading bar, an oscillating arm, a beam and various blocks, or the like. The bent shaft drives upper punches to ascend and descend. The compression cam and the mold unloading cam on the two sides of the bent shaft respectively make the negative mold, the first lower punch plate and the second punch plate successively realize the movement of downward floating two times by the pressure bar, the mold unloading bar, the oscillating arm, the beam and blocks to cooperate with the upper punches to do various pressing process on forming products and the work of mold unloading, which makes the forming products which is simply-structured or complicatedly-structured with steps homogeneous in upper denseness, lower denseness and the doneness of each step.

Description

Powder former

The utility model relates to a kind of powder former, and it is even to be not only on a kind of stampings that make simple shape lower density, but the stampings with complicated shape of press belt step and many steps also, and the density of each step is the desirable powder former of uniformity also.

Traditional powder former, mat upper punch move downward with the compression moulding product, and upper punch rises then, and stampings are ejected outside the mould.Because between the powder particle, and and contacted powder particle of die wall and die wall between, all exist friction, so plant the stampings that press is produced, its upper and lower density is extremely inconsistent, is bad stampings.

Powder former after the improvement, when adopting upper punch to move downward moulding product are carried out pressing process, former is also unsteady downwards, end-of-job to be pressed, former is floated downward once again, carries out the method for stripping operation.Obtain stampings with the method, can make the uniformity of density of the stampings of simple shape obtain very big improvement, but to some complex-shaped stampings, stampings as with the level even many steps, because each step cross section exists area difference, the suffered pressure difference of powder in each step, therefore above-mentioned drawing method still can not obtain the good stampings of each step density uniformity.

The utility model aims to provide a kind of powder former, the stampings that can not only make the simple shape that compacting comes out are consistent in density up and down, also can make the stampings with complicated shape of with the level even many steps of suppressing, the density of each step is the good stampings of uniformity also.

Technical problem to be solved in the utility model is: a kind of powder former is provided, and what make its with the level and many steps of suppressing out has complicated shape stampings, a density uniformity of each step.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: must be provided with in the powder former that is provided press belt step and many steps stampings punching under the multilayer that must have, in the press course of work, under former and the multilayer punching should realize stopping, float, stop, floating motion, carry out the action of precompressed, first pressing, final pressurization to cooperate upper punch.

Concrete structure is as follows:

The frame upper horizontal direction of the powder former that is provided is installed a bent axle, the rod journal of bent axle is positioned at the center of press, the rod journal place is set with the slider-crank mechanism that has several parts to assemble that comprises support, four jiaos of vertical direction of support are equipped with four cylinders, the piston rod directed downwards of cylinder.The below of flexural slip mechanism is provided with two upper punch mechanisms, and two mechanisms utilize concavo-convex T type structure to link into an integrated entity.The bottom of two upper punch mechanism is fixed with upper punch, and the both sides of in-house guide bracket plate bottom are equipped with guide pillar.The below of upper punch is the middle negative template that die cavity is arranged, there is through hole the negative template both sides, guide pin bushing is installed in the through hole, the guide pillar of above-mentioned guide bracket plate two bottom sides passes that guide pin bushing is sliding with it joins, four jiaos of negative templates are connected with four connecting rod guide pillars with screw, the lower end of connecting rod guide pillar connects the base plate that T type groove is arranged at the bottom with screw, by four connecting rod guide pillars negative template and base plate is linked into an integrated entity.The die cavity at negative template center respectively has two screwed through holes on its mutually perpendicular two center lines, is symmetrical distribution with the die cavity center, two pairs of length differ, the upper end has the push rod of screw thread, by being threaded on the negative template the equal directed downwards of the other end of push rod.The negative template below is provided with punching, once punching slightly is square, its center is a through hole with the level, four jiaos are respectively equipped with four through holes, being screwed axle sleeve in the through hole passes through therebetween for above-mentioned four connecting rod guide pillars, and join with the axle sleeve cunning, on the mutually perpendicular center line of through hole with the level, two pairs of each through holes different to diameter are respectively arranged, be symmetrical distribution with the center of through hole with the level, the a pair of through hole in front and back can make corresponding two push rods that are installed on the negative template pass through therebetween and sliding with it joining, shoulder is arranged in the middle of being equipped with in the two through hole of the left and right sides, the lower end is the depression bar on inclined-plane, shoulder and through hole cunning are joined, the top of through hole is screwed middle porose end cap, stop the shoulder of depression bar upwards to skid off through hole, expose outside the hole in the hole that the thin axle on depression bar top can pass in the middle of the end cap, a spring is installed in the below of depression bar shoulder, hold with cover plate, cover plate is fastened on the through hole bottom with screw, respectively be screwed the V-arrangement take-up housing below the cover plate, be mounted with the V-arrangement briquetting in the V-arrangement take-up housing, and can in the V-arrangement take-up housing, slide, V-arrangement briquetting vertical orientation has rectangular through slot, one cylinder roller is installed in rectangular through slot, and the cylinder roller is connected in the V-arrangement briquetting with pivot pin, once the inclined-plane of its lower end of depression bar on the punching just with the V-arrangement briquetting in the cylinder roller tangent.All fix a pin on V-type take-up housing and the V-type briquetting, the two ends of an extension spring are installed on it, for the V-type briquetting usefulness that resets.The below of V-type briquetting is provided with block, and block is screwed on the fixed punch headstock.The side at the left rear corner of punching and right front angle once, each is connected with the square supporting base with screw, be screwed the cylinder that vertical direction is settled on the level board of square supporting base, the piston rod of two cylinders that are the diagonal angle distribution in four cylinders on its cylinder block and the flexural slip mechanism support is corresponding.Once the below of punching is provided with punching two times, the structure of two times punchings is with once punching is roughly the same, and its difference only is that two times punchings are I shape, and its center is a through hole not with the level, do not have through hole on the center line of through hole left and right directions, two through holes are arranged on the center line of fore-and-aft direction.In the through hole concrete structure and once on the punching horizontal direction center line concrete structure in the two through hole consistent, two blocks below the V-type briquetting bottom two times punchings also are fixed on the fixed punch headstock.Two perpendicular type supporting bases that respectively have cylinder are fastened on screw on the left-front corner and right back angle of two times punchings, on cylinder block and the flexural slip mechanism support in addition two to be the cylinder piston rods that the diagonal angle distributes corresponding.The below of two times punchings is provided with the fixed punch headstock, in the middle of the fixed punch headstock is a through hole, be fastened with the block that uses for punching once with screw on the center line of its horizontal direction, also be fastened with block on the center line of its fore-and-aft direction for two times punching uses with screw.The gap location that four blocks are four jiaos has four through holes, be screwed axle sleeve in the through hole, pass through therebetween for aforementioned four connecting rod guide pillars, and join with the axle sleeve cunning, four jiaos of fixed punch headstocks are screwed for punching once and two times punchings four four piston rods that cylinder uses totally, and the fixed punch headstock is screwed on frame.The T type groove of base plate bottom is connected with the T type tongue of the upper end that several part assembling all-in-one-piece lower main axis are arranged, the shoulder place of lower main axis middle part is fastened with transverse arm with screw, in the middle of the transverse arm is manhole, lower main axis through hole since then passes, each is fastened on through hole the right and left the pinch roller briquetting on the transverse arm with screw, the left side of transverse arm left side pinch roller briquetting and the right of right pinch roller briquetting, respectively have outwardly open rectangular through slot, one L type centering block respectively is installed in the groove, and L type centering block and transverse arm are connected with the centering block pivot pin, and L type centering block can be swung around the centering block pivot pin in the opening rectangular channel, each two ends with screw and connecting plate, the lower end of the upright arm of two L type centering blocks couple together, one end of the piston rod of the cylinder that the right-hand member of connecting plate is also settled with screw and a horizontal direction is connected, the other end of cylinder block is screwed on transverse arm, be not subjected under the situation of external force at L type centering block, because cylinder charge, piston rod tension connecting plate respectively is on the horizontal and vertical position two arms of L type centering block.Respectively there is a block case two L type centering blocks following, and there is a breach its upper end of the block of block case, and the block case is fastened on the frame with screw.The transverse arm front is extension and the back end of extension to the right left, respectively has the U-shaped groove of opening, and the piston rod of two cylinders passes the U-shaped groove and with nut piston rod is fixed in the U-shaped groove, and two cylinders are fixed on the frame.The transverse arm left side is equipped with push rod with the intrinsic sleeve block of screw in the sleeve block, the lower end of push rod contacts with the horizontal arm of the L type centering block on the left side.

Bent axle the right and left respectively is equipped with cam, and the right is a welding cam, and the left side is pattern cam.The welding cam below is a press rods, press rods is divided into upward pressure bar and downforce bar, the upper end of upward pressure bar connects a roller with pivot pin, the lower end is screwed a final pressurized cylinder, it is that cylinder piston and the cylinder piston lower end that appearance by band oil circuit hole is stepped ramp type has the sliding oil cylinder piston of joining in the blind hole, and oil cylinder cover is screwed in cylinder piston bottom and forms, and blind hole and oil circuit hole communicate, and join with the oil circuit and the gas-liquid conversion cylinder of oil pipe by check valve and pressure regulator valve parallel connection.Cylinder piston is joined with outside cylinder block cunning, the cylinder cover screw that has air admission hole is fastened on the lower surface of cylinder block, the shoulder of cylinder piston bottom and cylinder block, cylinder head have been formed a cylinder, and cylinder block is fixed on the bearing, and bearing is screwed on frame.The upper end of upward pressure bar is installed in the Upper shaft sleeve, and Upper shaft sleeve is fixed with the flange key, in the keyway in this key straight cutting upward pressure bar, the upward pressure bar can only be moved up and down and can not rotate, and Upper shaft sleeve is screwed on frame.The downforce bar is made up of screwed threaded rod in lower end and nut, a straight-tooth is installed in the threaded rod bottom, and be connected on the threaded rod with screw, a straight-tooth is also installed in the lower end of nut, and has briquetting with screw straight-tooth to be fixed on the nut, pinch roller on the arm in briquetting bottom and the swing arm contacts, the top of threaded rod is equipped with supporting base, and supporting base is fastened on the frame with screw, and the nut outer cover is equipped with bearing holder (housing, cover), bearing holder (housing, cover) is installed on the casing, and casing is fixed on the frame.

Go out tringle also by on go out tringle and under go out tringle and form, on go out tringle the upper end connect a roller with pivot pin, the lower end is consolidated with an end of screw and connecting plate, on go out tringle the upper end be installed in the Upper shaft sleeve, Upper shaft sleeve is fixed with the flange key, go out on this key straight cutting in the keyway in the tringle, tringle can only be moved up and down and can not rotate, upper bearing sleeve is screwed on frame.The other end of connecting plate is connected with the piston rod of a cylinder, cylinder block then is fixed on the frame, on go out tringle the below go out tringle under having, the upper end that goes out tringle down also is consolidated with screw and connecting plate, the lower end that goes out tringle down is equipped with down jacking block, under it briquetting is arranged, and with screw with briquetting, down jacking block is fixed on down the upper and lower bottom that goes out tringle of tringle and is sleeved in the bearing block, bearing block is screwed on frame, and the briquetting bottom can contact with the pinch roller on the arm in the swing arm.

Swing arm is one and stretches the axle that four arms are arranged, see from right-to-left, except that about second arm, respectively be equipped with the pinch roller, its excess-three bar arm is all only installed a pinch roller, the axle of swing arm is installed on the bearing block of frame, after appointing one arm to be subjected to downward power effect in each arm by pinch roller, swing arm will be swung around axle, the pinch roller of swing arm low order end contacts with the briquetting of downforce bar, pinch roller on the pinch roller on the left side on the right-to-left second arm and the 3rd arm contacts with right left two briquettings on the transverse arm, and the pinch roller on the 4th arm contacts with the briquetting that goes out tringle down.

Concrete setting by above-mentioned various mechanisms, make press in the course of the work, former, once dash, dash for two times realize stopping, float, stop, floating motion, cooperate upper punch to carry out the work of precompressed, first pressing, final pressurization, and demoulding work finally make press suppress the good stampings with complicated shape of with the level or many steps of each step density uniformity.

The utility model can obtain further instruction from the following drawings and embodiment

Fig. 1. the utility model structural representation Fig. 5. the press rods schematic diagram

Fig. 2. mould bases schematic diagram Fig. 6. go out the tringle schematic diagram

Fig. 3 .A, B, C, D are to view Fig. 7. the swing arm schematic diagram

Fig. 4. transverse arm schematic diagram Fig. 8. the utility model pressure process and demoulding state diagram

Before the press work, make each cylinder charge earlier, so each mechanism enters holding state, enough metal dusts of filling in former 2-4 then.

Start press, power input bent axle 1-1, bent axle rotates, and upper punch 1-3 begins to float downward, and inserts in the metal dust, and the moulding product are carried out precompressed.At this moment, former 2-4, once punching 2-6, two times punching 2-13 are in halted state.Thereafter, upper punch continues to descend, and the moulding product are carried out first pressing.Meanwhile, the piston rod of four cylinder 1-2 and cylinder block 2-12 contact, and promote punching and float downward with upper punch with two times punchings.When punching once contacted with 2-14 with block 2-10 with the V-arrangement briquetting 2-8 of two times punching bottoms, once punching and two times punchings just stopped to float downward.By welding cam 1-25, roller 5-29, upward pressure bar 5-27, downforce bar 5-28, briquetting 5-32, pinch roller 7-40, promote swing arm 7-39 to lower swing, pinch roller 7-42 on left pinch roller 7-41 in the swing arm on the second arm and the 3rd arm is to pressing down the right side on the transverse arm 4-16, left briquetting 4-17, making transverse arm drive former floats downwards with upper punch, when the top of the block in the block case 4-22 is run in the upright arm bottom of two L type swing arm 4-18, transverse arm and former just stop to float downward, and upper punch has been finished first pressing to the moulding product.After first pressing finished, upper punch continued to descend, and the moulding product are finally pressurizeed.At this moment, former, once punching, two times punchings are in halted state.In final pressure process, welding cam is still promoting the decline of upward pressure bar, but swing arm can not be again to lower swing, so contract in the oil cylinder piston 5-31 in the upward pressure bar, in-oil cylinder fluid is flowed to gas-liquid conversion cylinder 5-46 via pipeline by pressure regulator valve 5-45, guaranteed that upper and lower press rods or other stressed part are injury-free.Simultaneously, because once punching and two times punchings are blocked by separately block, so contract in the piston rod of four cylinder 1-2, the compressed air of upper chamber of air cylinder is pushed back air accumulator, has guaranteed that piston rod and other stressed part are injury-free.After final pressurization finished, upper punch began to rise.At this moment, go out pattern cam 1-26 by roller 6-35, on go out tringle 6-33, go out tringle 6-34 down, make down jacking block 6-37 and briquetting 6-38 continue to move down, following jacking block promotes push rod 4-24 and moves down, push rod promotes L type centering block 4-18 and swings to counter-clockwise direction around pivot pin 4-19, the upright arm lower end of L type centering block and the upper end of the block in the block case disengage, so briquetting 6-38 promotes swing arm 7-39 again to lower swing by pinch roller 7-43, make former again to floating downward by transverse arm, finish the demoulding work of former.Former is floated downward in the process again, the depression bar 2-7 that four push rod 2-5 promote in punching and the two times punchings moves down, the inclined-plane of depression bar lower end outwards moves V-arrangement briquetting 2-8 by cylinder roller 2-9, V-arrangement briquetting and block 2-10 and 2-14 promptly disengage, once punching and two times punchings float downwards under the promotion of push rod 2-5, finish the demoulding work of punching and two times punchings.

Behind the compacting end-of-job, bent axle drives upper punch and replys the home position.The upward pressure bar and on go out tringle and restore the beginning position next time in the effect of the piston rod of cylinder piston 5-30 and cylinder 6-36, keep and cam separately contacts.The air inlet of cylinder 4-23 cavity of resorption promotes former and swing arm and downforce bar homing by transverse arm.Cylinder 2-11 top air inlet is because piston rod 2-15 is fixed, so cylinder block 2-12 just promotes punching, two times punching homings.Because the oil cylinder piston 5-31 lower end in the final pressurized cylinder has not had pressure, so the fluid in the gas-liquid conversion cylinder under the effect of air pressure, flows back to the oil cylinder of final pressurized cylinder, oil cylinder piston homing via check valve 5-44.Since on go out tringle and driven down the tringle homing, transverse arm drives L type centering block and rises, so under the effect of the piston rod of cylinder 4-21, two arms of L type centering block are in again on level and the vertical home position again by connecting plate 4-20, and push rod 4-24 is set back.

In sum, characteristics of the present utility model are: 1) be provided with two upper punch mechanisms, two upper punches can be installed, with full The requirement that the foot complicated die is installed. 2) except former, also be provided with punching, two times punchings and fixed punch headstock, Make the stampings with complicated shape of press energy press belt step and many steps. 3) each mechanism of press setting make former, Once punching, two times punchings in pressing process, realize stopping, float, stop, floating action, to cooperate upper punch products formed is advanced Work and the demoulding work of row precompressed, first pressing, final pressurization make the compacting with complicated shape with step and many steps The even density of each step of product is consistent.

Claims

1. powder former, include bent axle, welding cam, go out pattern cam, two upper punch mechanism, upper punch, negative template, once punching, two times punchings, fixed punch headstock, press rods, go out critical pieces such as tringle, swing arm, the various blocks of transverse arm.

The rod journal place of bent axle is with slider-crank mechanism, four jiaos of flexural slip mechanism are equipped with four cylinders, mechanism bottom is connected with concavo-convex T type groove with two upper punch mechanism under it, the bottom of two upper punch mechanism is connected with upper punch, it below the upper punch negative template, negative template is connected with base plate under it with four connecting rod guide pillars, main shaft on base plate and the following transverse arm couples together with concavo-convex T type groove, negative template bottom be equipped with two pairs each length differed be vertically arranged push rod mutually, be provided with punching between negative template and the base plate from top to bottom, two times punchings, the fixed punch headstock, once respectively install on punching and the two times punchings a pair of each to being vertically arranged depression bar mutually, corresponding with two pairs of push rods on the negative template respectively, also on diagonal angle separately, be equipped with a pair of each to being vertically arranged cylinder mutually, respectively be installed in four jiaos in flexural slip mechanism on four cylinders corresponding, punching once, two times punching respectively has four through holes, be fixed with axle sleeve in the through hole, four connecting rod guide pillars pass therebetween, making, punching and two times punchings can slide up and down along the connecting rod guide pillar, punching once, the block of two times punching uses is installed in respectively on the fixed punch headstock, and the fixed punch headstock is fixed on the frame.

The both sides of bent axle are equipped with welding cam and go out pattern cam, are respectively equipped with pressure rod it under and go out tringle, and the lower end of two bars all contacts with pinch roller in the swing arm.

Swing arm is one and stretches the axle that four arms are arranged, each arm end has been installed 5 pinch rollers altogether, the pinch roller of both sides contacts with pressure rod and the bottom that goes out tringle respectively, middle two pinch rollers contact with briquetting on the transverse arm, also have a pinch roller to be used for few filling, the axle of swing arm is installed on the frame, and after the pinch roller on each arm was subjected to downward thrust, swing arm can be swung around axle.

L type centering block also is installed on the transverse arm, has the block case to be fixed on the frame under it.

2. powder former according to claim 1 is characterized in that: press is provided with two upper punch mechanisms, and two upper punches can be installed, to satisfy the requirement that complicated die is installed.

3. powder former according to claim 1 is characterized in that: the setting of punching, two times punchings and fixed punch headstock once makes the press can the press belt step and the stampings with complicated shape of many steps.

4. powder former according to claim 1, it is characterized in that: the concrete structure of all the other mechanisms except that 2,3 described mechanisms that press is provided with, make former, once dash, be punched in for two times in the process of compression moulding product, the action that enforcement stops, floats, stops floating, the moulding product are carried out the work of precompressed, first pressing, final pressurization to cooperate upper punch, and the demoulding work of stampings after the moulding, make the density uniformity of each step of the stampings of the density of the stampings that the former of step suppresses out and band step that other drift is suppressed out and many steps.