CN114029486B - Magnet forming device - Google Patents

Abstract

The invention discloses a magnet forming device, which comprises a charging and demolding mechanism, at least two molds, a magnet pressing mechanism and a mold moving mechanism, wherein the charging and demolding mechanism is used for charging and demolding the magnet; the charging and demolding mechanism is arranged to be capable of adding magnetic powder to the mold and separating the molded magnet from the mold; the die is used for containing magnetic powder from the charging and demolding mechanism; the magnet pressing mechanism comprises a first pressing mechanism and a second pressing mechanism which are oppositely arranged, and the first pressing mechanism and the second pressing mechanism are arranged to be capable of relatively displacing so as to press the magnetic powder contained in the die into a molded magnet; the mold moving mechanism is configured to be capable of displacing at least two molds. The die of the magnet forming device is easy to replace, and the equipment utilization rate is high.

Description

Magnet forming device

Technical Field

The present invention relates to a magnet molding apparatus.

Background

At present, the forming equipment of the magnet has the problems of complex structure, low automation degree, low production efficiency, complex manufacture and replacement of the die, poor consistency of the manufactured magnet and the like.

CN1123017C discloses a manufacturing mould for one-step forming radiation orientation sintering of neodymium iron boron magnetic ring, comprising an upper mould and a lower mould, wherein the upper part of the upper mould plate of the upper mould is fixed with a press beam, and the lower part of the upper mould plate is not fixed with a seat plate; the seat board is fixed with the upper connecting rod through a gasket, the upper connecting rod can synchronously descend along with the upper template, the inside and the outside of the upper connecting rod are respectively provided with a composite upper core rod which descends relative to the upper connecting rod and ascends, an upper flat plate, an upper electromagnet and an upper lining ring which are fixed integrally, and the outside of the upper core rod at the lower end of the upper connecting rod is provided with a cushion block and a pressing ring which are fixedly and synchronously descended with the upper connecting rod, and an upper pressing head positioned by a shoulder blade of the pressing ring; the lower die and the upper die are coaxially arranged and comprise a die plate, a lower electromagnet and a middle flat plate which are fixed integrally, a die with the upper end held by a gasket and a pressing ring shoulder blade and a composite lower core rod are arranged in the die, a lower pressing head is arranged outside the lower core rod and positioned by a cushion block fixed with a lower connecting rod and a lower pressing ring shoulder blade, an annular cavity formed by the die and the lower core rod is a die cavity, and the tail end of the lower core rod is connected with the lower flat plate; a spring for floating the upper core rod is arranged between the top end of the upper core rod of the upper die and the upper die plate; the middle die plate is fixed with a lower beam of the press, a guide post which is in sliding fit with the middle die plate is arranged between the middle die plate and the lower die plate, the lower die plate is connected with a lower oil cylinder, and a lower oil cylinder piston is lifted and lowered to drive the middle die plate, the lower electromagnet, the die plate and the die in the lower die plate through the lower die plate and the guide post, and the middle die plate is guided to conduct lifting and lowering movement. The die is complex in structure, high in loading difficulty and low in consistency of manufactured magnets, and magnetic powder is prone to being unevenly distributed.

CN208099338U discloses a full-automatic radiation ring floating magnetic field shaping press, which comprises a frame, the storage bucket has been installed to sealed ground in the frame, title powder device, material feeding unit and forming device, the storage bucket is located title powder device top, title powder device, material feeding unit and forming device transversely set up in proper order, forming device includes forming die, upper punch, undershoot and magnetic field coil, upper punch and undershoot are located forming die's upper and lower both ends respectively, magnetic field coil is located forming die's side, the material feeding unit below is provided with balanced system, balanced system side is provided with the precision control case that is used for controlling balanced system, forming die is connected with material feeding unit. The molding press can only sequentially carry out the steps of loading, pressing, demolding and the like, and the utilization rate of loading equipment, pressing equipment and demolding equipment is low.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a magnet molding apparatus which is easy to replace a mold, has low equipment maintenance cost, and can produce a magnet with good consistency. Further, the device of the magnet forming device has high utilization rate and production efficiency. The technical aim of the invention is achieved by the following technical scheme.

The invention provides a magnet forming device, which comprises a charging and demolding mechanism, at least two molds, a magnet pressing mechanism and a mold moving mechanism, wherein the charging and demolding mechanism is used for charging and demolding the magnet;

the charging and demolding mechanism is arranged to be capable of adding magnetic powder to the mold and separating the molded magnet from the mold;

the die is used for containing magnetic powder from the charging and demolding mechanism;

the magnet pressing mechanism comprises a first pressing mechanism and a second pressing mechanism which are oppositely arranged, and the first pressing mechanism and the second pressing mechanism are arranged to be capable of relatively displacing so as to press the magnetic powder contained in the die into a molded magnet;

the mold moving mechanism is configured to be capable of displacing at least two molds.

According to the magnet molding apparatus of the present invention, preferably, the first pressing mechanism includes a first die base, a die plate, a first guide post, a first top cylinder, and a die rotating assembly; the first die base is arranged above the die plate and is arranged to be rotatable and liftable; the die plate is arranged above the first top cylinder and is in sliding connection with the first guide column; the first guide posts are arranged at least two and are respectively arranged at two sides of the first top cylinder; the first top cylinder is arranged to drive the first die base to move in the vertical direction; the die rotating assembly is arranged between the first die base and the first top cylinder and is arranged to drive the first die base to rotate; the mold rotation assembly includes a first bearing assembly and a first gear assembly; the upper end part of the first bearing assembly is connected with the first die base, and the lower end part of the first bearing assembly is connected with the output end of the first top cylinder; the first gear assembly is arranged on one side of the first bearing assembly and is arranged to drive the first bearing assembly to rotate so as to drive the first die base to rotate;

The second pressing mechanism comprises a main cylinder, a sliding block, a punch and a second bearing assembly; the main cylinder is arranged at the top end of the first guide column and is arranged to drive the punch to lift; the sliding block is arranged below the main cylinder and is in sliding connection with the first guide post; the punch is arranged below the sliding block and is used for pressing magnetic powder; the second bearing assembly is disposed between the output end of the master cylinder and the punch and is configured to enable the punch to rotate under the action of friction force between the punch and magnetic powder.

According to the magnet molding apparatus of the present invention, preferably, the upper end portion of the first die base is provided with a first groove, the middle portion of which is provided with a first positioning pin, the first positioning pin being provided higher than the edge portion of the groove; the lower tip of first mould base is provided with decurrent boss, the boss is used for connecting first mould base with the mould rotating assembly.

According to the magnet molding apparatus of the present invention, preferably, the first bearing assembly includes a first thrust self-aligning bearing, a first rotating shaft, and a first deep groove ball bearing; the first thrust aligning bearing is arranged on a first bearing seat at the output end of the first top cylinder; the first rotating shaft is arranged on the first thrust aligning bearing, and the upper end part of the first rotating shaft is connected with the first die base; the first deep groove ball bearing is embedded on the die plate, and the inner edge of the first deep groove ball bearing is contacted with the first rotating shaft;

The first gear assembly comprises a gear set base, a first motor, a first speed reducer and a first gear shaft; wherein the gear set base is arranged at one side of the output end of the first top cylinder; the first motor is arranged on the gear set base; the first motor is connected with the first speed reducer; the first speed reducer is connected with the first gear shaft, and the first gear shaft is meshed with the first rotating shaft;

the second bearing assembly comprises a second thrust aligning bearing, a second rotating shaft and a second deep groove ball bearing; the second thrust aligning bearing is arranged on a second bearing seat of the output end of the main cylinder; the second rotating shaft is arranged on the second thrust aligning bearing, and the lower end part of the second rotating shaft is connected with the punch; the second deep groove ball bearing is embedded on the sliding block, and the inner edge of the second deep groove ball bearing is contacted with the second rotating shaft.

According to the magnet molding apparatus of the present invention, preferably, the die moving mechanism is provided at one side of the magnet pressing mechanism, the die moving mechanism includes a die grasping device, a rotating device, and a lifting device, wherein,

the mould grabbing equipment comprises a cantilever and at least two groups of clamping equipment; the cantilever is connected with the upper end part of the rotating equipment and is used for driving the clamping equipment to move; at least two groups of clamping devices are arranged at two free ends of the cantilever; the clamping devices at least comprise two groups of clamping devices, wherein the clamping devices are arranged at one end of the cantilever and used for grabbing a magnet die to be pressed, and the clamping devices at the other end of the cantilever are used for grabbing a magnet die after being pressed;

The rotating equipment is arranged between the die grabbing equipment and the lifting equipment and is arranged to drive the die grabbing equipment to rotate;

the lifting device is arranged to drive the rotating device to move in the vertical direction.

According to the magnet molding apparatus of the present invention, preferably, the rotating device includes a rotating member, a third bearing assembly, and a second gear assembly; the upper end part of the rotating component is connected with the mold grabbing device, and the lower end part of the rotating component is connected with the upper end part of the third bearing assembly; the lower end part of the third bearing assembly is connected with the lifting equipment; the second gear assembly is arranged on one side of the rotating component and is arranged to drive the rotating component to rotate so as to drive the die grabbing equipment to rotate;

the lifting device comprises a second top cylinder, a sliding plate and a second guide column; the output end of the second top cylinder is connected with the lower end part of the rotating equipment; the sliding plate is arranged above the second top cylinder and is in sliding connection with the second guide post; the second guide posts are arranged at least two, and are respectively arranged at two sides of the second top cylinder.

According to the magnet molding apparatus of the present invention, preferably, the third bearing assembly includes a third thrust self-aligning bearing, a third rotating shaft, and a third deep groove ball bearing; the third thrust aligning bearing is arranged on a third bearing seat of the output end of the second top cylinder; the third rotating shaft is arranged on the third thrust aligning bearing, and the upper end part of the third rotating shaft is connected with the rotating part; the third deep groove ball bearing is embedded in the sliding plate, and the inner edge of the third deep groove ball bearing is contacted with the third rotating shaft;

the second gear assembly comprises a second motor, a second speed reducer and a second gear shaft; the second motor is arranged on the sliding plate and is connected with the second speed reducer; the second speed reducer is connected with the second gear shaft, and the second gear shaft is meshed with the rotating component;

the rotating component comprises a transverse shaft and a longitudinal shaft, wherein the transverse shaft is used for connecting the cantilever; the longitudinal axis is used for connecting the third rotating shaft;

the cantilever is a long straight arm, the middle part of the long straight arm is connected with the upper end part of the rotating device, and the distances between the clamping devices at the two ends of the long straight arm and the intersection point of the transverse shaft and the longitudinal shaft of the rotating part are equal.

According to the magnet molding apparatus of the present invention, preferably, the charging and demolding mechanism is provided on one side of the magnet pressing mechanism, the charging and demolding mechanism including a charging device, a second mold base, and a demolding device; the demolding equipment comprises an ejector rod and a third ejector cylinder;

the charging equipment is arranged above the second die base and is used for adding magnetic powder into the die; the second die base is used for bearing the die, and a die base hole for the ejector rod to pass through is formed in the bottom of the second die base; one part of the ejector rod is arranged below the second die base, and the other part of the ejector rod is arranged to penetrate through the die base hole and the opening part at the bottom of the die to eject the formed magnet; the third top cylinder is connected with the top rod and is arranged to drive the top rod to lift along the axial direction of the die.

According to the magnet forming apparatus of the present invention, preferably, the charging device includes a weighing device and a charging device, the weighing device and the charging device being connected by a connecting member; the weighing device is arranged above the feeding device and is arranged to be capable of quantitatively providing magnetic powder to the feeding device; the feeding equipment is arranged above the second die base and is arranged to be capable of adding magnetic powder to the die;

The upper end part of the second die base is provided with a second groove, the middle part of the second groove is provided with a second locating pin, and the second locating pin is higher than the edge part of the second groove; the bottom of the second groove is provided with a die base hole surrounding the second locating pin;

the top position of the top rod, which is arranged at the upper end part of the top rod, can exceed the plane of the top of the second locating pin, and the bottom position of the top rod, which is arranged at the upper end part of the top rod, is lower than or flush with the plane of the die base hole.

According to the magnet molding apparatus of the present invention, preferably, the mold is a ring-shaped magnet molding mold including an inner wall, an outer wall, and a bottom plate;

the inner wall is surrounded to form a die center cavity, and two ends of the die center cavity are opened and used for positioning the punch;

wherein the outer wall is sleeved on the outer side of the inner wall;

the bottom plate is arranged between the inner wall and the outer wall, and is provided with an opening part for the ejector rod to be inserted;

wherein, a mould annular cavity for containing magnetic powder is formed among the inner wall, the outer wall and the bottom plate; one end of the die annular cavity is provided with an opening part for the punch to be inserted into, and the other end of the die annular cavity is provided with the bottom plate;

The punch is arranged in such a way that the transverse section of the lower end part of the punch is concentric circles, and the concentric circles are a rod core, a punch annular cavity and a punch body from inside to outside.

The magnet pressing mechanism is easier to replace the die, and the maintenance cost of the equipment is lower. By adopting the magnet pressing mechanism, the die can be lifted and rotated freely, and the uniformity of magnetic powder distribution and the uniformity of magnetic powder stress during pressing can be improved, so that the consistency of the formed magnet is improved. The bottom of the second die base of the charging and demolding mechanism is provided with a die base hole through which a push rod passes, and at least one part of the push rod can pass through the die base hole and an opening part at the bottom of the die to push out the formed magnet. The molded magnet is slowly ejected from the bottom of the magnet due to the protection of the inner wall of the mold, so that the magnet is not easy to be damaged. The loading device and the demolding device are arranged at the same station, and the mold can be loaded immediately after demolding is completed, so that the production efficiency is higher. The two free ends of the cantilever of the mould moving mechanism are respectively provided with the clamping equipment, the clamping equipment at one end of the cantilever can grasp the mould (the magnet mould to be pressed) loaded with the magnetic powder, the clamping equipment at the other end of the cantilever can grasp the mould (the magnet mould after pressing) loaded with the forming magnet at the same time, and the position exchange can be realized through simple lifting and rotation, so that the utilization rate of the equipment of the magnet pressing mechanism, the loading and demoulding mechanism is improved, and the production efficiency is also improved. The annular magnet forming die is provided with the die annular cavity, so that magnetic powder can be pressed into an annular magnet at one time, and the die is not easy to damage and break down during production, so that the reliability of equipment is high, and the maintenance cost is low. Furthermore, the die is provided with a die center cavity that aids in the positioning of the punch. Further, an opening is formed in the bottom plate of the die, so that demolding of the magnet is facilitated. Therefore, the die of the magnet forming device is easy to replace, the equipment utilization rate and the production efficiency are high, and the magnet with good consistency can be manufactured.

Drawings

Fig. 1 is a front view of a magnet forming apparatus of the present invention.

Fig. 2 is a partial enlarged view of fig. 1.

Fig. 3 is a partial enlarged view of fig. 1.

Fig. 4 is a partial enlarged view of fig. 1.

Fig. 5 is a partial enlarged view of fig. 1.

Fig. 6 is a top view of a ring magnet forming die of the present invention.

Fig. 7 is a longitudinal cross-sectional view of fig. 6.

Fig. 8 is a support ring of the present invention.

The reference numerals are as follows:

1-a magnet pressing mechanism; 11-a first pressing mechanism; 111-a first mold base; 1111—a first locating pin; 112-a mold plate; 113-a first guide post; 114-a first top cylinder; 115-a mold rotation assembly; 1150-a first bearing assembly; 1151-a first deep groove ball bearing; 1152-a first thrust self-aligning bearing; 1153-a first spindle; 1154-a first gear assembly; 12-a second pressing mechanism; 121-a master cylinder; 122-a second bearing assembly; 123-sliding blocks; 124-punch; 1241-a stick core; 1242-punch annular cavity; 1243-punch body; 125-mounting base; 126-flange plate;

2-a mold moving mechanism; 21-a mold gripping apparatus; 211-cantilever; 212-clamping means; 22-rotating equipment; 221-a third bearing assembly; 2211-a third thrust self-aligning bearing; 2212—a third rotating shaft; 2213-a third deep groove ball bearing; 222-a rotating member; 223-a second gear assembly; 23-lifting equipment; 231-a second top cylinder; 2311-a third bearing; 232-a sliding plate; 233-a second guide post;

3-a loading and demolding mechanism; 31-demolding device; 311-a third top cylinder; 312-ejector pins; 32-a second mold base; 321-a second locating pin; 322-die base holes; 323-a first leg; 33-a charging device; 331-a weighing device; 332-a charging device; 333-a second leg; 334-a support plate; 335 a connecting member;

4-a ring magnet forming die; 41-inner wall; 42-outer wall; 43-a bottom plate; 44-a support ring; 45-a mold central cavity; 46-a mold annular cavity; 47-stage;

5-a workbench.

Detailed Description

The invention will be described in more detail below, but is not limited thereto.

The magnet forming device comprises a charging and demolding mechanism, at least two molds, a magnet pressing mechanism and a mold moving mechanism. Optionally, it further comprises a work table. The charging and demolding mechanism is configured to be capable of adding magnetic powder to the mold and to be capable of releasing the molded magnet from the mold. The mold is used for accommodating magnetic powder from the charging and demolding mechanism. The magnet pressing mechanism is provided to be able to press the magnetic powder contained in the mold to form a magnet. The mold moving mechanism is configured to be capable of displacing at least two molds. The magnet forming apparatus of the present invention is preferably an apparatus for annular magnet forming. The following is a detailed description.

< magnet pressing mechanism >

The magnet pressing mechanism of the present invention is provided to be capable of pressing the magnetic powder contained in the mold to form a magnet. The magnet pressing mechanism may include a first pressing mechanism and a second pressing mechanism disposed opposite to each other, the first pressing mechanism and the second pressing mechanism being disposed so as to be capable of relative displacement to press the magnetic powder contained in the mold into a molded magnet. For example, the second pressing mechanism is disposed above the mold, and the first pressing mechanism is disposed below the mold. The following is a detailed description.

First pressing mechanism

The first pressing mechanism comprises a first die base, a die plate, a first guide post, a first top cylinder and a die rotating assembly.

The first top cylinder is arranged below the die plate and can drive the die rotating assembly and the die plate to lift, so that the first die base is driven to lift. The first top cylinder may be a hydraulic cylinder, an air cylinder or an electric cylinder, preferably a hydraulic cylinder.

The first guide posts of the invention are arranged at two sides of the first top cylinder. The number of the first guide posts may be two or more, preferably four.

The die plate of the present invention may be a rectangular plate. The die plate is provided with a first through hole for passing a first rotating shaft of the die rotating assembly. The die plate is in sliding connection with the first guide post. Specifically, any sliding connection may be employed. For example, a second through hole is formed in the die plate, and the die plate is sleeved on the first guide post through the second through hole; or the die plate is provided with a groove, the first guide column is provided with a corresponding sliding rail, and the die plate is clamped on the sliding rail of the first guide column through the groove. The number of first guide posts may be set to be the same as the number of second through holes.

According to some embodiments of the invention, the die plate is a rectangular plate, and the central position, preferably the central position, of the die plate is provided with a first through hole for the first spindle to pass through. The corner of the die plate is respectively provided with a second through hole, and the second through holes are used for sleeving the die plate on the first guide post. The second through holes may be provided in two or more, preferably four. Therefore, abrasion of the output end of the first top cylinder can be reduced, and stable lifting of the first die base can be ensured. In addition, stability when the first mould base rotates can be guaranteed, and the pressing effect of magnetic powder can be improved.

The die rotating assembly is arranged between the first die base and the first top cylinder and can drive the first die base to rotate. This can drive the mold to rotate.

The mold rotation assembly may include a first bearing assembly and a first gear assembly. The upper end of the first bearing assembly is connected with the first die base, and the lower end of the first bearing assembly is connected with the output end of the first top cylinder. The first gear assembly is arranged on one side of the first bearing assembly and is arranged to drive the first bearing assembly to rotate so as to drive the first die base to rotate. The setting structure is simple, the uniformity of the magnet is improved, and the pressing times are reduced, so that one-time pressing forming is realized.

The first bearing assembly may include a first thrust self-aligning bearing, a first shaft, and a first deep groove ball bearing. The first thrust aligning bearing is arranged on a first bearing seat at the output end of the first top cylinder; the first rotating shaft is arranged on the first thrust aligning bearing, and the upper end part of the first rotating shaft is connected with the first die base; the first deep groove ball bearing is embedded on the die plate, and the inner edge of the first deep groove ball bearing is contacted with the first rotating shaft. The radial pressure is buffered by the first deep groove ball bearing, and eccentricity can be prevented. The axial pressure is buffered through the first thrust self-aligning bearing, so that the stress is uniform during magnetic powder pressing, and the pressing effect of the magnetic powder is improved.

The first gear assembly may include a gear set base, a first motor, a first speed reducer, and a first gear shaft. The gear set base is arranged at one side of the output end of the first top cylinder; the first motor is arranged on the gear set base; the first motor is connected with a first speed reducer, the first speed reducer is connected with a first gear shaft, and the first gear shaft is meshed with the first rotating shaft so as to drive the first rotating shaft to rotate.

The first mold base of the present invention is provided above the mold plate, and is provided to be rotatable and liftable. The first die base is used for bearing and driving the die to rotate and lift.

The shape of the outer contour of the first mold base is not particularly required as long as it is matched with the mold. For example, the outer contour shape of the first mold base may be rectangular or cylindrical.

The upper end of the first die base is provided with a first groove. The first groove may be a rectangular groove or a circular groove with an upward opening. In some embodiments, the outer contour shape of the first mold base is rectangular or cylindrical, and the upper end of the first mold base is provided with a rectangular or circular groove with an upward opening.

The lower end of the first die base is provided with a downward boss. Preferably, a boss is provided at a central position of the lower end portion of the first mold base. The boss is provided with a means for connecting the first mold base to the mold rotating assembly. For example, an internal threaded hole is provided on the boss, or an external thread is provided on the periphery of the boss. In some embodiments, the lower end of the first mold base is provided with a downward boss having a plurality of internally threaded holes disposed thereon.

The first die base is provided with a first positioning groove and/or a first positioning pin for accurately positioning and fixing the die. For example, a first positioning pin is provided in the middle of the upper end portion of the first mold base, or a first positioning groove is provided in the first mold base. According to one embodiment of the present invention, a first positioning pin is provided at the center of the upper end portion of the first mold base. The first locating pin not only aids in locating, but also is magnetically permeable during orientation. The first positioning pin may have a columnar structure that gradually widens from top to bottom. The longitudinal section of the end portion of the first positioning pin is preferably triangular, and the longitudinal section of the lower end portion thereof is rectangular. Thus, the mold can be prevented from being blocked by errors, and the mold cannot smoothly enter the first mold base.

According to some embodiments of the invention, the upper end of the first die base is provided with a first groove, the middle of the first groove is provided with a first positioning pin, and the first positioning pin is arranged higher than the edge part of the groove; the lower tip of first mould base is provided with decurrent boss, and the boss is used for connecting first mould base and mould rotating assembly.

According to further embodiments of the invention, the outer contour of the first mold base is cylindrical, and the upper end of the first mold base is provided with a circular first recess with an upward opening. The central point of first recess puts and is provided with first locating pin, and first locating pin is higher than the marginal portion of first recess, and the lower tip of first mould base is provided with the boss, is provided with a plurality of internal thread holes that link up the lower tip of first mould base and the upper end of first bearing assembly on the boss. This configuration facilitates the installation and replacement of the first mold base and the mold. The number of bosses may be 4-6.

In some embodiments, an orientation magnet is also provided alongside the first mold mounting base. The orientation magnet is of conventional construction and will not be described in detail herein.

Second pressing mechanism

The second pressing mechanism comprises a main cylinder, a second bearing assembly, a sliding block and a punch.

The main cylinder of the invention is arranged at the top end of the first guide post, and is arranged to drive the punch to lift. The master cylinder may be a hydraulic cylinder or a pneumatic cylinder, preferably a hydraulic cylinder. In some embodiments, the master cylinder is disposed on the upper cross beam at the top end of the first guide post, with the output end of the master cylinder facing vertically downward.

The sliding block is arranged below the main cylinder and is in sliding connection with the first guide post. The slider may be a rectangular block or a rectangular plate. The sliding block is provided with a third through hole which can be used for the second rotating shaft of the second bearing assembly to pass through. The slider is in sliding connection with the first guide post. Specifically, any sliding connection may be employed. For example, a fourth through hole is formed in the sliding block, and the sliding block is sleeved on the first guide post through the fourth through hole; or the sliding block is provided with a groove, the first guide column is provided with a corresponding sliding rail, and the die plate is clamped on the sliding rail of the first guide column through the groove. The number of first guide posts may be set to be the same as the number of fourth through holes.

According to some embodiments of the invention, the slider is a rectangular plate, and a central position, preferably a central position, of the slider is provided with a third through hole through which the second rotation shaft passes. The corners of the slide block are respectively provided with a fourth through hole for sleeving the slide block on the guide post, and the fourth through holes can be more than two, preferably four. Therefore, abrasion of the output end of the main cylinder can be reduced, stable lifting and rotation of the punch can be guaranteed, and the pressing effect of magnetic powder can be improved.

The second bearing assembly of the present invention is provided between the output end of the master cylinder and the punch, and is provided to enable the punch to rotate under the action of friction force between the punch and the magnetic powder. The second bearing assembly may include a second thrust self-aligning bearing, a second shaft, and a second deep groove ball bearing. The second thrust aligning bearing is arranged on a second bearing at the output end of the main cylinder; the second rotating shaft is arranged on the second thrust aligning bearing, and the lower end part of the second rotating shaft is connected with the punch; the second deep groove ball bearing is embedded on the sliding block, and the inner edge of the second deep groove ball bearing is contacted with the second rotating shaft. The structure can lead the stress to be even when the magnetic powder is pressed, and is beneficial to improving the pressing effect of the magnetic powder and the yield of the magnet.

The punch head is arranged below the sliding block and used for pressing magnetic powder. Specifically, the upper end of the punch is used for connecting the second bearing assembly, and the lower end of the punch is used for pressing magnetic powder. The upper end of the punch may be connected to the lower end of the second bearing assembly through a flange and a mounting base. The upper end of the punch is provided with means for mounting the punch, such as screws or internally threaded holes. The lower end of the punch is arranged in any structure matched with the die. Preferably, the transverse section of the lower end part of the punch is concentric circle, and the concentric circle sequentially comprises a rod core, a punch annular cavity and a punch body from inside to outside.

According to some embodiments of the invention, the upper end of the punch is connected to the second shaft of the second bearing assembly by a flange and a mounting base. According to other embodiments of the present invention, the lower end portion of the punch is of a cylindrical structure, and the transverse cross section of the lower end portion thereof is concentric. A rod core is arranged at the central position; the periphery of the rod core is provided with a punch annular cavity; the periphery of the punch annular cavity is provided with a punch body which is used for pressing magnetic powder in the die. The punch with the structure can be matched with the die, the magnetic powder is pressed into the annular magnet at one time, the movable die and the punch are simple in structure and easy to maintain and replace, and the problems that the die is difficult to replace, difficult to maintain, high in maintenance cost and the like can be effectively solved.

< mold moving mechanism >

The mold moving mechanism of the present invention is provided so as to be capable of displacing at least two molds. The die moving mechanism is arranged at one side of the magnet pressing mechanism. The mould moving mechanism comprises lifting equipment, rotating equipment and mould grabbing equipment. The following is a detailed description.

Lifting equipment

The lifting device is arranged to drive the rotating device to move in the vertical direction. The lifting device comprises a second top cylinder, a sliding plate and a second guide post.

The output end of the second top cylinder is connected with the lower end part of the rotating equipment, and the second top cylinder drives the rotating equipment to lift, so that the mold grabbing equipment is driven to move in the vertical direction. The second top cylinder may be a hydraulic cylinder, a pneumatic cylinder or an electric cylinder, preferably a pneumatic cylinder. According to some embodiments of the invention, the output end of the second top cylinder is vertically upward, and a third bearing seat for mounting the rotating equipment is provided on the output end of the second top cylinder.

The second guide post of the invention is arranged around the second top cylinder. The number of second guide posts may be two or more, preferably four.

The sliding plate is arranged above the second top cylinder and is in sliding connection with the second guide post. The sliding plate may be a rectangular plate. The sliding plate is provided with a fifth through hole for passing the rotating device. The sliding plate and the second guide post can be connected in a sliding way in any connection mode, for example, a sixth through hole is formed in the sliding plate, and the sliding plate is sleeved on the second guide post through the sixth through hole; or the sliding plate is provided with a groove, the second guide column is provided with a corresponding sliding rail, and the sliding plate is clamped on the sliding rail of the second guide column through the groove. The number of second guide posts may be set to be the same as the number of sixth through holes.

According to some embodiments of the invention, the sliding plate is a rectangular plate, and a fifth through hole is provided in a middle position, preferably in a center position, of the sliding plate. The fifth through hole is used for the rotation equipment to pass through. The corners of the sliding plate are respectively provided with a sixth through hole. The sixth through holes may be provided in two or more, preferably four. The sixth through hole is used for sleeving the sliding plate on the second guide post. Therefore, not only can the abrasion of the output end of the second top cylinder be reduced, but also the die grabbing equipment can be ensured to stably lift. In addition, the stability of the rotating equipment can be improved, and the magnetic powder is prevented from being scattered during rotation.

Rotary device

The rotating equipment is arranged on the lifting equipment and is arranged to drive the mould grabbing equipment to rotate. The rotating apparatus includes a third bearing assembly, a rotating member, and a second gear assembly.

The third bearing assembly of the present invention is disposed on a lifting device. In some embodiments, a third bearing assembly is disposed on a third bearing seat of the second top cylinder output. The third bearing assembly may include a third thrust self-aligning bearing, a third shaft, and a third deep groove ball bearing. The third thrust aligning bearing is arranged on the third bearing seat; the third rotating shaft is arranged on the third thrust aligning bearing, and the upper end part of the third rotating shaft is connected with the rotating part; the third deep groove ball bearing is embedded on the sliding plate, and the inner edge of the third deep groove ball bearing is contacted with the third rotating shaft.

The rotating component of the present invention is disposed between the mold gripping apparatus and the bearing assembly. The upper end of the rotating component is connected with the mould grabbing device, and the lower end of the rotating component is connected with the upper end of the third bearing assembly. In certain embodiments, the rotating component comprises a transverse shaft and a longitudinal shaft, the transverse shaft being for connecting to a mold gripping apparatus; the longitudinal axis is used for connecting the third rotating shaft.

According to some embodiments of the invention, the rotating member is of a T-shaped configuration, a transverse shaft portion of the T-shaped configuration is provided with at least two threaded holes, a longitudinal shaft portion of the T-shaped configuration is provided with a gear matching the second gear assembly, and a lower end portion of the longitudinal shaft is connected to an upper end portion of the third bearing assembly. This helps to improve the stability of the mould gripping device.

The second gear component is arranged on one side of the rotating component and can drive the rotating component to rotate, so that the mold grabbing equipment is driven to rotate. The second gear assembly may include a second motor, a second speed reducer, and a second gear shaft. The second motor is arranged on the sliding plate and is connected with the second speed reducer; the second speed reducer is connected with a second gear shaft, and the second gear shaft is meshed with the rotating component.

Mould grabbing equipment

The die grabbing device is arranged on the rotating device and is arranged to be capable of grabbing the magnet die to be pressed and the magnet die after pressing simultaneously. The mold gripping apparatus includes a cantilever and at least two sets of clamping apparatus.

The cantilever is arranged at the upper end part of the rotating equipment and is used for driving the clamping equipment to move. The cantilever is fixedly or detachably connected, e.g. welded, clamped or screwed, to the upper end of the rotating device. The cantilever can be a main arm and a rotating arm which are connected with each other, and can also be a long straight arm or a straight arm with two telescopic ends. In some embodiments, the cantilever arm employs a long straight arm, the middle of which is connected to the upper end of the rotating device.

According to some embodiments of the invention, the cantilever is a long straight arm, the middle point of the long straight arm is connected with the upper end part of the rotating device, and at least one group of clamping devices are respectively arranged at two ends of the long straight arm, so that the distance between the clamping device at one end of the cantilever and the intersection point of the transverse axis and the longitudinal axis of the rotating part is equal to the distance between the clamping device at the other end of the cantilever and the intersection point.

The clamping device of the invention is arranged at both free ends of the cantilever. The clamping device at one end of the cantilever is used for grabbing the magnet mold to be pressed, and at the same time, the clamping device at the other end of the cantilever is used for grabbing the magnet mold after being pressed. The clamping device of the present invention is preferably a clevis and a pneumatic jaw. The clamping devices are arranged in at least two groups. In some embodiments, the distances between the at least two sets of gripping devices and the intersection of the transverse and longitudinal axes of the rotating component are equal.

According to some embodiments of the invention, the clamping device is two sets of pneumatic clamping jaws, the two sets of pneumatic clamping jaws are respectively arranged at two free ends of the long straight arm, and the distances between the two sets of pneumatic clamping jaws and the intersection point of the transverse axis and the longitudinal axis of the rotating component are equal. The structure can simultaneously grasp the magnet mold to be pressed and the magnet mold after being pressed, and the position exchange can be realized only through simple rotation and lifting. Then, placing the magnet mould to be pressed on a forming mechanism at one side of a mould moving mechanism for orientation and press forming; and placing the pressed magnet mould on a loading and demoulding mechanism at the other side of the mould moving mechanism, and carrying out magnet demoulding and magnetic powder loading. By means of the circulation, high-efficiency production can be achieved, and meanwhile, the utilization rate of equipment of the magnet pressing mechanism, the charging mechanism and the demolding mechanism can be improved.

< mechanism for charging and releasing >

The charging and demolding mechanism of the present invention is provided so as to be able to add magnetic powder to the mold and to be able to release the molded magnet from the mold. The loading and demolding mechanism is arranged on one side of the magnet pressing mechanism. The charging and demolding mechanism includes a charging device, a second mold base, and a demolding device.

Demolding device

The demolding device is arranged below the second mold base. The demolding device comprises an ejector rod and a third ejector cylinder.

A part of the ejector rod is arranged below the second die base, and the other part of the ejector rod can penetrate through the die base hole and the opening part at the bottom of the die to eject the formed magnet. In some embodiments, the lower end of the ejector rod is disposed below the second mold base, and the upper end of the ejector rod is disposed so as to be able to pass through the second mold base hole and the opening of the mold bottom to eject the molded magnet. The ejector rod may be provided in one or more, for example, two. Preferably, the top of the upper end part of the ejector rod is provided with an anti-skid block, so that the contact area can be increased, and the demolding of the magnet is facilitated.

In some embodiments, the highest position of the upper end of the ejector rod can be above the plane of the top of the second locating pin. The lowest position of the upper end part of the ejector rod in the descending way is lower than the plane of the second die base hole or is flush with the plane of the second die base hole. Thus, demolding can be realized, and magnetic powder can be prevented from being scattered during filling.

The third ejection cylinder is connected with the ejector rod and is arranged to drive the ejector rod to lift along the axial direction of the die, so that the magnet can be ejected out of the die. The third top cylinder can be a hydraulic cylinder, an air cylinder or an electric cylinder; preferably a cylinder. In some embodiments, a third top cylinder is disposed below the top rod, the third top cylinder is disposed on a table surface of the workbench, an output end of the third top cylinder is vertically upward, and the output end of the third top cylinder is connected with a lower end portion of the top rod.

According to some embodiments of the present invention, the demolding apparatus includes a third top cylinder and two ejector rods, the output end of the third top cylinder is vertically upward, the two ejector rods are connected to the output end of the third top cylinder, and when the output end of the third top cylinder is completely extended, the highest position of the rising upper end of the ejector rod exceeds the plane where the top of the second positioning pin is located; when the output end of the third top cylinder is completely retracted, the lowest position of the upper end part of the top rod, where the upper end part of the top rod descends, is lower than or flush with the plane of the die base hole.

Second die base

The second mold base is disposed between the demolding apparatus and the charging apparatus. The second die base is used for bearing the die.

The invention has no special requirement on the outer contour shape of the second die base, and the second die base is matched with the die. For example, the outer contour shape of the second mold base is rectangular or cylindrical.

The upper end of the second die base is provided with a second groove. The second groove may be a rectangular groove or a circular groove with an upward opening. In some embodiments, the outer contour shape of the second mold base is rectangular or cylindrical, and the upper end of the second mold base is provided with a rectangular or circular second groove with an upward opening.

The second die base is provided with a second locating pin for accurately locating and fixing the die. The second locating pin may be provided in the middle of the upper end of the die base, preferably in a central position. The second positioning pin may have a columnar structure that gradually widens from top to bottom. The longitudinal section of the end portion of the second positioning pin is preferably triangular, and the longitudinal section of the lower end portion thereof is rectangular. Thus, the mold can be prevented from being blocked by errors, and the mold cannot smoothly enter the second mold base.

In some embodiments, the upper end of the second mold base is provided with a second recess. The second positioning pin may be located in the middle of the second groove, preferably in the center of the second groove. The tip of the second positioning pin is disposed higher than the edge portion of the second groove. This aids in positioning.

The bottom of the second die base is provided with a die base hole for the ejector rod to pass through. The shape of the die base hole is not particularly limited, such as circular, rectangular, or arc. In some embodiments, the mold base hole is disposed at the bottom of the second groove and surrounds the outer circumference of the second positioning pin. The die base aperture may be provided in one or more, for example two. The die base holes may be distributed in an annular array at the bottom of the second recess. The die base aperture is preferably an arcuate aperture surrounding the second locating pin.

The lower end of the second die base is provided with a downward boss, and the boss is provided with an internal thread hole. The second mold base is thus connected to the rotating assembly by the internally threaded bore. This configuration facilitates installation and replacement of the second mold base.

The rotating assembly of the present invention is disposed below the second mold base. The rotating assembly is configured to drive the second mold base to rotate. The structure can improve the uniformity of the charging and is beneficial to the demolding of the magnet.

The rotating assembly may include a third motor, a third speed reducer, a third gear shaft, and a fourth shaft. The third motor is connected with a third speed reducer; the third speed reducer is connected with a third gear shaft, the third gear shaft is meshed with a fourth rotating shaft, and the fourth rotating shaft is connected with the lower end part of the second die base. The fourth spindle may be fixedly connected or detachably connected, for example welded or screwed, to the lower end of the mold base. In some embodiments, the fourth shaft is threadably coupled to a boss at the lower end of the second mold base.

Charging device

The charging device is arranged to be able to charge the mould. The charging device comprises a weighing device and a charging device. The weighing device and the charging device can be connected through a connecting component. The connecting member is preferably an elastic connecting member.

The charging device of the invention is arranged above the second mould base and is arranged to be able to add magnetic powder to the mould. The invention is not particularly limited to the charging device, and can be of conventional design. In certain embodiments, the feeding device is provided with a second mass sensor, a second vibrator and a second blocking device for controlling the magnetic powder discharging mass.

In certain embodiments, the charging device comprises a charging device body, a second mass sensor is arranged below the charging device body, a second vibrator is arranged on the side wall of the charging device body, and a second plugging device is arranged at the lower end opening of the charging device body. The body of the charging device is preferably funnel-shaped. This prevents the magnetic powder from being scattered and contributes to filling the mold with the filler.

The weighing device of the invention is arranged above the charging device and is arranged to be capable of quantitatively conveying magnetic powder to the charging device. The structure of the weighing apparatus of the present invention is not particularly limited, and conventional weighing apparatuses can be employed. In certain embodiments, the weighing device is provided with a first mass sensor, a first vibrator and a first plugging device for controlling the magnetic powder blanking mass; the feeding equipment is provided with a second mass sensor, a second vibrator and a second plugging device for controlling the magnetic powder blanking mass.

In certain embodiments, the weighing device comprises a weighing device body, a first mass sensor is arranged below the weighing device body, a first vibrator is arranged on the side wall of the weighing device body, and a first plugging device is arranged at the lower end opening of the weighing device body.

< Ring magnet Forming die >

The mold of the present invention is configured to receive magnetic powder from a loading and unloading mechanism. In certain embodiments, the magnet forming apparatus comprises at least two molds, preferably two molds. The two dies are respectively arranged on the first die base and the second die base. The mold of the present invention is preferably a ring magnet forming mold. Comprising an inner wall, an outer wall, a bottom plate and optionally a support ring.

Inner wall

The inner wall of the annular magnet forming mold may be a cylindrical structure. The inner wall is enclosed to form a central cavity of the die. And two ends of the die center cavity are opened and used for positioning the punch. The shape of the two openings is not particularly limited.

According to some embodiments of the invention, the height of the inner wall is greater than or equal to the height of the outer wall. When the height of the inner wall is greater than the height of the outer wall, it is more helpful to position the punch for pressing the magnetic powder onto the annular magnet forming die.

The transverse cross-section of the central cavity of the mould according to the invention may be of any shape, for example circular or rectangular. In certain embodiments, the transverse cross-section of the central cavity of the mold is circular.

Outer wall

The outer wall of the annular magnet forming die is sleeved outside the inner wall. The outer wall may be a cylindrical structure. In some embodiments, the inner wall and the outer wall are each cylindrical, and the centers of the circles of the inner wall and the outer wall overlap.

According to some embodiments of the invention, the upper edge of the outer wall is provided outside with a platform surrounding the outer wall for a circumference. This structure can prevent the magnetic powder unrestrained, helps prolonging the life of its below equipment.

According to some embodiments of the present invention, a mold locating pin or a mold locating groove is provided on the outer wall to help better locate, secure the ring magnet forming mold to the first mold base or the second mold base.

Bottom plate

The bottom plate of the annular magnet forming die is respectively connected with the inner wall and the outer wall. The bottom plate, the inner wall and the outer wall can be integrally formed, and can also be welded or detachably connected.

In some embodiments, a bottom plate is disposed between the inner wall and the outer wall, and an opening portion is provided in the bottom plate for inserting the jack. The opening on the bottom plate can be a plurality of through holes distributed in an annular array or arc-shaped holes surrounding the central cavity of the die.

According to some embodiments of the invention, the bottom plate has a transverse cross-section of the same shape and size as the transverse cross-section of the mold annular cavity. The bottom plate is arranged between the inner wall and the outer wall and is positioned at the same end part of the inner wall and the outer wall, and a plurality of through holes distributed in annular arrays are arranged on the bottom plate or one or a plurality of arc-shaped holes surrounding the central cavity of the die are arranged on the bottom plate.

A die annular cavity for accommodating magnetic powder is formed among the inner wall, the outer wall and the bottom plate, one end of the die annular cavity is provided with an opening part for inserting a punch, and the other end of the die annular cavity is provided with the bottom plate. The transverse cross-section of the mould annular cavity may be of any shape, for example a circular or rectangular ring. In some embodiments, the transverse cross-section of the central mold cavity is circular, the transverse cross-section of the annular mold cavity is circular, and the center of the central mold cavity overlaps the center of the annular mold cavity.

According to some embodiments of the invention, the inner wall and the outer wall are respectively cylindrical, and the centers of the circles of the inner wall and the outer wall overlap; the transverse section of the die center cavity is circular, the transverse section of the die annular cavity is circular, and the circle center of the die center cavity is overlapped with the circle center of the die annular cavity.

Support ring

The support ring is arranged in the annular cavity of the die and can cover the opening part on the bottom plate, and the support ring can move up and down along the annular cavity of the die to enable the molded magnet to be demolded. In some embodiments, the outer edge of the support ring is disposed against the inner side of the outer wall and the inner edge of the support ring is disposed against the outer side of the inner wall. The shaped magnet of the present invention is preferably a shaped ring magnet.

According to some embodiments of the invention, the support ring is a thin layer iron ring disposed within and movable up and down the mold annular cavity. The transverse section of the supporting ring is the same as the transverse section of the annular cavity of the die, and the supporting ring can cover the opening part on the bottom plate to prevent leakage of magnetic powder.

< workbench >

The magnet forming apparatus of the present invention may further include a table. The workbench is used for supporting the magnet pressing mechanism, the die moving mechanism and the charging and demolding mechanism.

Example 1

As shown in fig. 1, the magnet molding apparatus includes a magnet pressing mechanism 1, a die moving mechanism 2, a charging and demolding mechanism 3, a table 5, and two annular magnet molding dies 4. The magnet pressing mechanism 1, the die moving mechanism 2 and the charging and demolding mechanism 3 are all arranged on the workbench 5. The mold moving mechanism 2 is disposed between the magnet pressing mechanism 1 and the charging and demolding mechanism 3.

The magnet pressing mechanism 1 includes a first pressing mechanism 11 and a second pressing mechanism 12. The first pressing mechanism 11 is disposed on the table 5, and the second pressing mechanism 12 is disposed opposite to the first pressing mechanism 11.

The first pressing mechanism 11 of the present embodiment includes a first die base 111, a die plate 112, a first guide post 113, a first top cylinder 114, a die rotating assembly 115, and a radiation orientation magnet (not shown).

The first top cylinder 114 is disposed below the mold plate 112 and is located on the table 5. The first top cylinder 114 drives the lifting of the mold rotating assembly 115 and the mold plate 112, thereby driving the first mold base 111 to lift. The first top cylinder 114 of the present embodiment is a hydraulic cylinder.

The first guide post 113 is fixed to the table 5. The first guide posts 113 are provided in a plurality (e.g., four). The first guide posts 113 are disposed around the first top cylinder 114, respectively.

The mold plate 112 is a rectangular plate. The center of the mold plate 112 is provided with a first through hole, and corners thereof are respectively provided with a plurality of second through holes (for example, four). The first through hole accommodates the boss of the first mold base 111. The mold plate 112 is sleeved on the first guide post 113 through the second through hole.

As shown in fig. 2, a mold-rotating assembly 115 is disposed between the first mold base 111 and the first top cylinder 114. The mold-rotation assembly 115 includes a first bearing assembly 1150 and a first gear assembly 1154.

The first bearing assembly 1150 includes a first deep groove ball bearing 1151, a first thrust self-aligning bearing 1152, and a first rotating shaft 1153. A first thrust self-aligning bearing 1152 is disposed on a first bearing seat at the output of first top cylinder 114. The first shaft 1153 is disposed on the first thrust self-aligning bearing 1152, and an upper end portion of the first shaft 1153 is connected to the first mold base 111. The first deep groove ball bearing 1151 is embedded in the first through hole of the mold plate 112, and an inner edge thereof is in contact with the first rotation shaft 1153.

A first gear assembly 1154 is disposed on one side of the first shaft 1153, which drives the first shaft 1153 to rotate, thereby rotating the first mold base 111. First gear assembly 1154 includes a gear set base, a first motor, a first speed reducer, and a first gear shaft; the gear set base is arranged at one side of the output end of the first top cylinder 114; the first motor is arranged on the gear set base; the first motor is connected to a first speed reducer, which is connected to a first gear shaft, which is meshed with the first shaft 1153, thereby driving the first shaft 1153 to rotate.

The first mold base 111 is disposed above the mold plate 112. The upper end of the first mold base 111 has a first groove, for example, a circular groove. The center of the first groove is provided with a first positioning pin 1111. The first positioning pin 1111 is higher than the edge portion of the groove. The first positioning pin 1111 not only can position the mold, but also can conduct magnetic. The lower end of the first mold base 111 is provided with a downward boss. The boss is provided with a plurality of internal thread holes. In this manner, the first mold base 111 and the first shaft 1153 of the mold rotation assembly 115 may be coupled through the internally threaded hole.

The radiation orientation magnet is disposed beside the first mold base 111. The radiation oriented magnets do not rotate with the first mold base 111. When the magnetic powder is pressed, the magnetic powder is in a relative rotating magnetic field, which is helpful for obtaining a uniform radiation ring. A copper water cooling pipe is arranged in the shell space outside the electromagnet coil of the radiation orientation magnet.

As shown in fig. 1 and 3, the second pressing mechanism 12 is disposed above the first pressing mechanism 11. The second pressing mechanism 12 includes a master cylinder 121, a second bearing assembly 122, a slider 123, a punch 124, a mounting base 125, and a flange 126.

The master cylinder 121 is disposed on an upper cross member located at the top of the first guide post 113. The output end of the master cylinder 121 is connected to a second bearing assembly 122.

As shown in fig. 3, the punch 124 is composed of a cylindrical punch body 1243, a punch annular cavity 1242, and a rod core 1241. The rod core 1241 is located in the middle of the punch body 1243, forming a punch annular cavity 1242 therebetween.

The slider 123 is disposed below the master cylinder 121 and above the punch 124, and the slider 123 is slidably connected to the first guide post 113. A third through hole for the second bearing assembly 122 to pass through is formed in the middle of the sliding block 123; the corners of the slider 123 are respectively provided with a plurality of fourth through holes for sleeving the slider 123 on the first guide post 113. The fourth through holes may be provided in two or more, preferably four.

The second bearing assembly 122 is disposed between the master cylinder 121 and the ram 124. The output end of the master cylinder 121 is provided with a second bearing, a second thrust self-aligning bearing is provided on the second bearing, and a second rotating shaft (not shown) is provided below the second thrust self-aligning bearing. The lower end of the second rotating shaft is connected with a flange plate 126, and the lower end of the flange plate 126 is connected with a mounting base 125. The lower end of the mounting base 125 is connected to the punch 124. The second deep groove ball bearing (not shown) is embedded in the third through hole of the slider 123, and the inner edge thereof is in contact with the second rotating shaft. The master cylinder 121 of the present embodiment is a hydraulic cylinder.

As shown in fig. 1 and 4, the die moving mechanism 2 is provided at one side of the magnet pressing mechanism 1. The mold moving mechanism 2 includes a mold grasping device 21, a rotating device 22, and a lifting device 23. A lifting device 23 is provided on the table 5, and a rotating device 22 is provided between the lifting device 23 and the mold gripping device 21.

The lifting device 23 of the present embodiment includes a second top cylinder 231, a sliding plate 232, and a second guide post 233.

The second top cylinder 231 is disposed on the surface of the workbench 5, the output end of the second top cylinder 231 is vertically upward, and a third bearing seat 2311 is disposed on the output end of the second top cylinder 231. In this embodiment, the second top cylinder 231 is a cylinder.

The second guide post 233 is disposed around the second top cylinder 231. The second guide posts 233 are provided in plural, for example, four. The lower end of the second guide post 233 is connected to the surface of the table 5.

The slide plate 232 is disposed between the second top cylinder 231 and the mold gripping apparatus 21, and is slidably connected to the second guide post 233. A fifth through hole is provided in the middle of the sliding plate 232 for the rotation device 22 to pass through. The corner of the sliding plate 232 is provided with a sixth through hole. The sliding plate 232 is sleeved on the second guide post 233 through a sixth through hole.

The rotating apparatus 22 of the present embodiment includes a third bearing assembly 221, a rotating member 222, and a second gear assembly 223.

Third bearing assembly 221 includes a third thrust self-aligning bearing 2211, a third spindle 2212, and a third deep groove ball bearing 2213. A third thrust self-aligning bearing 2211 is disposed on third bearing seat 2311; the third rotating shaft 2212 is disposed on the third thrust aligning bearing 2211, and an upper end portion thereof is connected to the rotating member 222; the third deep groove ball bearing 2213 is embedded in the fifth through hole of the sliding plate 232. The inner edge of the third deep groove ball bearing 2213 is in contact with the third rotating shaft 2212.

The rotating member 222 is disposed between the mold gripping apparatus 21 and the third bearing assembly 221. The rotating part 222 is of a T-shaped structure, and at least two threaded holes are formed in the transverse shaft of the rotating part 222 and are used for being connected with the die grabbing device 21; the lower end of the longitudinal axis of the rotating member 222 is connected to the third rotational shaft 2212, and a gear matching the second gear assembly 223 is provided on the longitudinal axis.

The second gear assembly 223 is disposed on one side of the rotating member 222, and is used for driving the rotating member 222 to rotate, thereby driving the mold grabbing device 21 to rotate. The second gear assembly 223 includes a second motor, a second reduction gear, and a second gear shaft (not shown). The second motor is arranged on the sliding plate 232 and is connected with the second speed reducer; the second speed reducer is connected to a second gear shaft, which is meshed with the rotating member 222.

The mold gripping apparatus 21 of the present embodiment includes a cantilever 211 and a clamping apparatus 212.

The cantilever 211 is disposed on the transverse axis of the rotary member 222. The cantilever 211 is a long straight arm. The middle part of the cantilever 211 is connected with the transverse shaft of the rotating member 222, and both ends of the cantilever 211 are respectively provided with a set of clamping devices 212.

The clamping device 212 is a pneumatic clamping jaw. The two sets of gripping devices 212 are equidistant from the intersection a of the transverse and longitudinal axes of the rotating member 222. Wherein, a group of clamping devices 212 positioned at one end of the cantilever 211 grabs a magnet mold to be pressed, and at the same time, another group of clamping devices 212 positioned at the other end of the cantilever 211 grabs a magnet mold after being pressed; and vice versa.

As shown in fig. 1 and 5, the charging and demolding mechanism 3 is provided on one side (the side away from the magnet pressing mechanism 1) of the mold moving mechanism 2. The charging and demolding mechanism 3 comprises a demolding device 31, a second mold base 32 and a charging device 33. The demolding apparatus 31 is arranged on the work table 5, the second mold base 32 is arranged above the demolding apparatus 31, and the charging apparatus 33 is arranged above the second mold base 32.

The demolding apparatus 31 of the present embodiment includes a third ram 311 and a ram 312. The third top cylinder 311 is arranged on the surface of the workbench 5, and the output end of the third top cylinder 311 is vertically upwards. The output end of the third jack cylinder 311 is connected to the lower end of the jack rod 312. The jack 312 is provided in at least one, for example, two. The third top cylinder 311 of the present embodiment is a cylinder.

A plurality of first struts 323, for example, two struts are provided on both sides of the third top cylinder 311. The lower end of the first support column 323 is fixed to the surface of the table 5. The upper end portion of the first support column 323 is provided with a second die base 32.

The second die base 32 of the present embodiment is disposed on the same line as the longitudinal axes of the first die base 111 and the rotating member 222. The horizontal distance between the second mold base 32 and the longitudinal axis of the rotating member 222 is equal to the horizontal distance between the first mold base 111 and the longitudinal axis of the rotating member 222. The second die base 32 is at the same height as the initial position of the first die base 111.

The second die base 32 has a cylindrical outer contour, and is provided with a circular second recess in its middle portion, which is open upward. The center of the second groove is provided with a second positioning pin 321. The tip of the second positioning pin 321 is higher than the edge portion of the second groove. The bottom of the second mold base 32 is provided with a mold base hole 322 through which the ejector pin 312 passes. The die base holes 322 are distributed in an annular array at the bottom of the second groove and around the periphery of the second positioning pin 321. The number of die base holes 322 is plural, for example, two. The upper end of the ram 312 is capable of passing through the die base aperture 322. When the output end of the third jack 311 is fully extended, the highest position where the upper end of the jack 312 rises exceeds the plane in which the top of the second positioning pin 321 is located. When the output end of the third ram 311 is fully retracted, the upper end of the ram 312 is lowered to a lowest position below the plane of the die base aperture 322 or flush with the plane of the die base aperture 322. In the present embodiment, when the output end of the third ram 311 is fully retracted, a portion of the upper end of the ram 312 is received in the mold base aperture 322. A plurality of second struts 333, for example two, are provided alongside the demolding device 31. The second support 333 has a lower end connected to the table 5 and an upper end connected to one end of the support plate 334. The other end of the support plate 334 is connected to the upper end of the first guide post 113. The support plate 334 is used for connecting the charging device 33.

The charging device 33 of the present embodiment includes a weighing device 331 and a charging device 332. The weighing device 331 is fixed below the support plate 334. A connecting member 335 is provided at one side of the weighing device 331. The charging device 332 is arranged between the weighing device 331 and the second mould base 32. The weighing device 331 is connected to the charging device 332 via a connecting member 335. The weighing device 331 is used to quantitatively supply the magnetic powder to the charging device 332. The weighing device 331 is provided with a first mass sensor for controlling the magnetic powder discharging mass, a first vibrator and a first blocking device (not shown). The charging device 332 is used to add magnetic powder to the mold. The charging device 332 is provided with a second mass sensor for controlling the magnetic powder discharging mass, a second vibrator and a second plugging device (not shown).

Two ring-shaped magnet forming dies 4 are provided on the first die base 111 and the second die base 32, respectively. As shown in fig. 6 to 8, the ring magnet forming mold 4 includes an inner wall 41, an outer wall 42, a bottom plate 43, and a support ring 44.

The inner wall 41 is cylindrical. The inner wall 41 encloses a mold central cavity 45. The die center cavity 45 is open at both ends. The outer wall 42 is sleeved outside the inner wall 41. The outer wall 42 is cylindrical. The outer wall 42 is arranged concentrically with the inner wall 41, i.e. with overlapping centers. The bottom plate 43 is disposed between the inner wall 41 and the outer wall 42. A die annular cavity 46 is formed between the inner wall 41, the outer wall 42 and the bottom plate 43, one end of the die annular cavity 46 has an opening portion into which the punch 124 is inserted, and the other end is provided with the bottom plate 43. The bottom plate 43 is provided with a plurality of through holes, for example, two through holes, distributed in an annular array for inserting the jack 312.

In this embodiment, the transverse cross section of the central mold cavity 45 is circular, the transverse cross section of the annular mold cavity 46 is circular, and the central mold cavity 45 and the annular mold cavity 46 are concentrically arranged, i.e. the centers of the two circles overlap.

In this embodiment, the height of the inner wall 41 and the height of the outer wall 42 are equal, and a platform 47 surrounding the outer wall 42 for one circle is provided outside the upper edge of the outer wall 42.

The support ring 44 of this embodiment may be a circular ring. The support ring 44 is disposed within a mold annular cavity 46 between the inner wall 41 and the outer wall 42, which is capable of concealing the through-holes in the bottom plate 43. The support ring 44 is capable of moving up and down the mold annular cavity 46 to demold the molded annular magnet. The outer edge of the support ring 44 is disposed against the inside of the outer wall 42 and the inner edge thereof is disposed against the outside of the inner wall 41.

The operation method of the magnet forming apparatus of the present invention is described below:

in actual production, the first die base 111 and the second die base 32 each carry a ring-shaped magnet forming die 4. The specific use process is as follows:

1) The charging and demolding mechanism 3 performs demolding and charging.

The ejector rod 312 is pushed upwards along the two through holes on the bottom plate 43 of the annular magnet forming die 4 to push the supporting ring 44 to move upwards, so that the formed annular magnet is demolded. After demolding is completed, the ram 312 is lowered and the support ring 44 is dropped back to the original position.

The weighing device 331 automatically weighs the magnetic powder of the set mass and delivers the magnetic powder to the charging device 332. The charging device 332 uniformly charges the magnetic powder into the ring-shaped magnet forming die 4 carried by the second die base 32, completing the charging.

2) Synchronously, the magnet pressing mechanism 1 performs orientation and pressing.

The master cylinder 121 of the second pressing mechanism 12 drives the slider 123 and the punch 124 to move downward, so that the punch 124 enters the annular magnet forming die 4 carried by the first die base 111 and stops when moving to a die clamping position where the punch contacts the magnetic powder. Meanwhile, the first top cylinder 114 of the first pressing mechanism 11 drives the die plate 112 to move upwards until the pressing height reaches the set value. At this time, the punch body 1243 of the punch 124 is just in contact with the magnetic powder, and no pressure is generated. The magnetic powder in the annular magnet forming die 4 is rotationally oriented. The main cylinder 121 of the second pressing mechanism 12 continues to drive the sliding block 123 and the punch 124 to slowly move downwards, the first top cylinder 114 of the first pressing mechanism 11 continues to drive the die plate 112, the first die base 111 and the annular magnet forming die 4 carried by the die plate 112 to slowly move upwards, and the die rotating assembly 115 mounted on the die plate 112 drives the first die base 111 to rotate. Friction is gradually generated between the punch body 1243 and the magnetic powder, and when the friction is sufficiently large, the punch 124 rotates with the first die base 111. The relative movement between the punch body 1243 and the magnetic powder is gradually changed into relative static, so that uniformity of distribution of the magnetic powder is improved.

The first pressing mechanism 11 and the second pressing mechanism 12 continue to move toward each other to complete the pressing of the magnetic powder. The two movements simultaneously can reduce the difference of compaction densities at the upper end and the lower end of the magnet. After the pressing is completed, the die rotating assembly 115 stops rotating, and the master cylinder 121 drives the slider 123 and the punch 124 to return to the initial positions. The first top cylinder 114 drives the die plate 112, the first die base 111 and the annular magnet forming die 4 carried by the die plate to return to the initial position, and pressing is completed.

3) After demolding, charging, orientation and pressing are completed, the mold moving mechanism 2 performs gripping.

The mold gripping apparatus 21 grips the ring magnet forming mold 4 carried on the first mold base 111 and the second mold base 32, respectively, by the clamping devices 212 located at both ends of the cantilever 211. Lifting device 23 is lifted to bring two annular magnet forming dies 4 out of two die bases; the rotating device 22 drives the die grabbing device 21 to rotate 180 degrees; the lifting device 23 descends and the two ring-shaped magnet forming dies 4 exchange positions. The clamping device 212 is released and a working cycle is completed.

Example 2

The rest of the structure is the same as in embodiment 1 except for the following structure:

a positioning groove (not shown) is formed in the inner side wall of the edge part of the second groove.

A rotating assembly (not shown) is provided below the second mold base 32. The rotating assembly is provided at an upper end portion of the first support column 323. The rotating assembly comprises a third motor, a third speed reducer, a third gear shaft and a fourth rotating shaft. The third motor is connected with a third speed reducer; the third speed reducer is connected to a third gear shaft, which is engaged with a fourth rotating shaft, which is connected to the lower end portion of the second die base 32. The fourth rotation shaft may be detachably connected to the lower end portion of the second mold base 32, for example, by a screw connection.

The lower end of the second die base 32 is provided with a boss provided with an internal threaded hole connecting the lower end of the second die base 32 with the rotating assembly. The number of internal threaded holes may be plural, for example, four.

Example 3

The other structures are the same as in embodiment 1 except for the following structures:

the cantilever 211 is a straight arm with telescopic two ends, and the lengths of the straight arms at the left end and the right end of the cantilever 211 are equal after the straight arms extend out. The clamping device 212 is a clevis.

Example 4

The rest of the structure is the same as in embodiment 1 except for the following structure:

the height of the inner wall 41 is greater than the height of the outer wall 42.

The present invention is not limited to the above-described embodiments, and any modifications, improvements, substitutions, and the like, which may occur to those skilled in the art, fall within the scope of the present invention without departing from the spirit of the invention.

Claims (9)

1. The magnet forming device is characterized by comprising a charging and demolding mechanism, at least two molds, a magnet pressing mechanism and a mold moving mechanism;

the charging and demolding mechanism is arranged to be capable of adding magnetic powder to the mold and separating the molded magnet from the mold;

the die is used for containing magnetic powder from the charging and demolding mechanism;

the magnet pressing mechanism comprises a first pressing mechanism and a second pressing mechanism which are oppositely arranged, and the first pressing mechanism and the second pressing mechanism are arranged to be capable of relatively displacing so as to press the magnetic powder contained in the die into a molded magnet;

the die moving mechanism is arranged to be capable of displacing at least two dies; the die moving mechanism is arranged on one side of the magnet pressing mechanism and comprises die grabbing equipment, rotating equipment and lifting equipment;

the mould grabbing equipment comprises a cantilever and at least two groups of clamping equipment; the cantilever is connected with the upper end part of the rotating equipment and is used for driving the clamping equipment to move; at least two groups of clamping devices are arranged at two free ends of the cantilever; at least two sets of clamping devices are arranged: the clamping device at one end of the cantilever is used for grabbing a magnet die to be pressed, and the clamping device at the other end of the cantilever is used for grabbing a magnet die after pressing;

The rotating equipment is arranged between the die grabbing equipment and the lifting equipment and is arranged to drive the die grabbing equipment to rotate;

the lifting device is arranged to drive the rotating device to move in the vertical direction.

2. The magnet forming apparatus of claim 1 wherein the first pressing mechanism comprises a first die base, a die plate, a first guide post, a first top cylinder, and a die rotation assembly; the first die base is arranged above the die plate and is arranged to be rotatable and liftable; the die plate is arranged above the first top cylinder and is in sliding connection with the first guide column; the first guide posts are arranged at least two and are respectively arranged at two sides of the first top cylinder; the first top cylinder is arranged to drive the first die base to move in the vertical direction; the die rotating assembly is arranged between the first die base and the first top cylinder and is arranged to drive the first die base to rotate; the mold rotation assembly includes a first bearing assembly and a first gear assembly; the upper end part of the first bearing assembly is connected with the first die base, and the lower end part of the first bearing assembly is connected with the output end of the first top cylinder; the first gear assembly is arranged on one side of the first bearing assembly and is arranged to drive the first bearing assembly to rotate so as to drive the first die base to rotate;

The second pressing mechanism comprises a main cylinder, a sliding block, a punch and a second bearing assembly; the main cylinder is arranged at the top end of the first guide column and is arranged to drive the punch to lift; the sliding block is arranged below the main cylinder and is in sliding connection with the first guide post; the punch is arranged below the sliding block and is used for pressing magnetic powder; the second bearing assembly is disposed between the output end of the master cylinder and the punch and is configured to enable the punch to rotate under the action of friction force between the punch and magnetic powder.

3. The magnet forming apparatus according to claim 2, wherein an upper end portion of the first die base is provided with a first groove, a middle portion of which is provided with a first positioning pin, the first positioning pin being provided higher than an edge portion of the groove; the lower tip of first mould base is provided with decurrent boss, the boss is used for connecting first mould base with the mould rotating assembly.

4. The magnet forming apparatus of claim 3 wherein the first bearing assembly comprises a first thrust self-aligning bearing, a first spindle, and a first deep groove ball bearing; the first thrust aligning bearing is arranged on a first bearing seat at the output end of the first top cylinder; the first rotating shaft is arranged on the first thrust aligning bearing, and the upper end part of the first rotating shaft is connected with the first die base; the first deep groove ball bearing is embedded in the die plate, and the inner edge of the first deep groove ball bearing is contacted with the first rotating shaft;

The first gear assembly comprises a gear set base, a first motor, a first speed reducer and a first gear shaft; wherein the gear set base is arranged at one side of the output end of the first top cylinder; the first motor is arranged on the gear set base; the first motor is connected with the first speed reducer; the first speed reducer is connected with the first gear shaft, and the first gear shaft is meshed with the first rotating shaft;

the second bearing assembly comprises a second thrust aligning bearing, a second rotating shaft and a second deep groove ball bearing; the second thrust aligning bearing is arranged on a second bearing seat of the output end of the main cylinder; the second rotating shaft is arranged on the second thrust aligning bearing, and the lower end part of the second rotating shaft is connected with the punch; the second deep groove ball bearing is embedded in the sliding block, and the inner edge of the second deep groove ball bearing is contacted with the second rotating shaft.

5. The magnet forming apparatus according to claim 1, wherein:

the rotating apparatus includes a rotating member, a third bearing assembly, and a second gear assembly; the upper end part of the rotating component is connected with the mold grabbing device, and the lower end part of the rotating component is connected with the upper end part of the third bearing assembly; the lower end part of the third bearing assembly is connected with the lifting equipment; the second gear assembly is arranged on one side of the rotating component and is arranged to drive the rotating component to rotate so as to drive the die grabbing equipment to rotate;

The lifting device comprises a second top cylinder, a sliding plate and a second guide column; the output end of the second top cylinder is connected with the lower end part of the rotating equipment; the sliding plate is arranged above the second top cylinder and is in sliding connection with the second guide post; the second guide posts are arranged at least two, and are respectively arranged at two sides of the second top cylinder.

6. The magnet forming apparatus according to claim 5, wherein:

the third bearing assembly comprises a third thrust aligning bearing, a third rotating shaft and a third deep groove ball bearing; the third thrust aligning bearing is arranged on a third bearing seat of the output end of the second top cylinder; the third rotating shaft is arranged on the third thrust aligning bearing, and the upper end part of the third rotating shaft is connected with the rotating part; the third deep groove ball bearing is embedded in the sliding plate, and the inner edge of the third deep groove ball bearing is contacted with the third rotating shaft;

the second gear assembly comprises a second motor, a second speed reducer and a second gear shaft; the second motor is arranged on the sliding plate and is connected with the second speed reducer; the second speed reducer is connected with the second gear shaft, and the second gear shaft is meshed with the rotating component;

The rotating component comprises a transverse shaft and a longitudinal shaft, wherein the transverse shaft is used for connecting the cantilever; the longitudinal axis is used for connecting the third rotating shaft;

the cantilever is a long straight arm, the middle part of the long straight arm is connected with the upper end part of the rotating device, and the distances between the clamping devices at the two ends of the long straight arm and the intersection point of the transverse shaft and the longitudinal shaft of the rotating part are equal.

7. The magnet forming apparatus of claim 1, wherein the charging and demolding mechanism is disposed on one side of the magnet pressing mechanism, the charging and demolding mechanism comprising a charging device, a second mold base, and a demolding device; the demolding equipment comprises an ejector rod and a third ejector cylinder;

the charging equipment is arranged above the second die base and is used for adding magnetic powder into the die; the second die base is used for bearing the die, and a die base hole for the ejector rod to pass through is formed in the bottom of the second die base;

one part of the ejector rod is arranged below the second die base, and the other part of the ejector rod is arranged to penetrate through the die base hole and the opening part at the bottom of the die to eject the formed magnet; the third top cylinder is connected with the top rod and is arranged to drive the top rod to lift along the axial direction of the die.

8. The magnet forming apparatus according to claim 7, wherein:

the charging equipment comprises weighing equipment and charging equipment, and the weighing equipment is connected with the charging equipment through a connecting part; the weighing device is arranged above the feeding device and is arranged to be capable of quantitatively providing magnetic powder to the feeding device; the feeding equipment is arranged above the second die base and is arranged to be capable of adding magnetic powder to the die;

the upper end part of the second die base is provided with a second groove, the middle part of the second groove is provided with a second locating pin, and the second locating pin is higher than the edge part of the second groove; the bottom of the second groove is provided with a die base hole surrounding the second locating pin;

the top position of the top rod, which is arranged at the upper end part of the top rod, can exceed the plane of the top of the second locating pin, and the bottom position of the top rod, which is arranged at the upper end part of the top rod, is lower than or flush with the plane of the die base hole.

9. The magnet forming apparatus according to any one of claims 1 to 8, wherein the mold is a ring-shaped magnet forming mold including an inner wall, an outer wall, and a bottom plate;

The inner wall is surrounded to form a die center cavity, and two ends of the die center cavity are opened and used for positioning the punch; the outer wall is sleeved on the outer side of the inner wall; the bottom plate is arranged between the inner wall and the outer wall, and is provided with an opening part for the ejector rod to be inserted; a die annular cavity for accommodating magnetic powder is formed among the inner wall, the outer wall and the bottom plate; one end of the die annular cavity is provided with an opening part for the punch to be inserted into, and the other end of the die annular cavity is provided with the bottom plate;

the punch is arranged in such a way that the transverse section of the lower end part of the punch is concentric circle, and the concentric circle sequentially comprises a rod core, a punch annular cavity and a punch body from inside to outside.

Images