CN116713468A - An automatically adjustable large aspect ratio mold positioning device - Google Patents

Abstract

An automatically adjustable high aspect ratio die positioning device, the high aspect ratio die comprising a female die and a core rod positioned in a cavity of the female die; the die positioning device with the large height-diameter ratio comprises a main shaft and at least three positioning rods uniformly distributed around the main shaft, wherein a positioning frame is fixedly arranged at the bottom end of the main shaft positioning frame; each positioning rod is respectively connected with a connecting rod transmission mechanism, and each connecting rod transmission mechanism is driven by a lifting mechanism; when the positioning rod is used, the connecting rod transmission mechanism drives the positioning rod to swing, so that the wall supporting end abuts against the inner wall of the cavity, and the clamping action end abuts against and clamps the core rod. The invention positions the core bar by controlling the distance from each direction of the core bar to the inner diameter of the female die, can reduce the offset of the core bar, improve the precision of pressed billets, reduce the waste of powder, and the whole device converts all positioning movements into the sliding of the main shaft sliding block, thereby having convenient operation and easy installation and disassembly.

Description

An automatically adjustable large aspect ratio mold positioning device

Technical field

The invention relates to, in particular, an automatically adjustable large aspect ratio mold positioning device.

Background technique

At present, cemented carbide sheets are mainly formed by molding, cold isostatic pressing and other methods. The molding method usually uses an integral cavity mold for compression molding. When sheets are formed using this method, problems such as cracks and delamination are prone to occur at the sharp corners and water chestnuts of the sheet due to the elastic after-effects during demoulding.

Cold isostatic pressing is to pack the powder into a bag and use a three-dimensional loading method to make the powder evenly pressed. Then the compact is taken out of the cold isostatic press chamber and the bag is removed to obtain irregular shapes. of compact.

When a mold with a large aspect ratio is pressed, the core rod has a large offset at the end due to its large aspect ratio. In order to avoid the offset of the core rod when loading powder and ensure product size and accuracy requirements, it is generally placed inside the female mold. Place an object that will position the core rod.

At present, the core rod in pressing is positioned through the inner hole on the punch at the lower end of the female mold. Because there is a matching gap and the core rod is high, the core rod shakes greatly at the upper end of the female mold. There is a need to load materials at the upper end of the female mold. You can only manually stabilize the core rod or use an end cap with an inner hole to correct the core rod after loading powder, or use a specific funnel positioning corresponding to the specific female mold and core rod.

However, using a hand-held core rod is extremely unstable and the effect is extremely poor; the correction effect of using an upper end cap is not ideal and because the thickness of the contact point between the upper end cap and the powder is uneven, the core rod will be subjected to shearing force during the pressing process, often resulting in The end cover is worn and the core rod is broken; the special funnel is inconvenient to assemble and disassemble and can only be used in a combination with the matching female mold core rod, which has poor versatility.

Therefore, how to solve the above-mentioned deficiencies in the prior art has become a subject to be studied and solved by the present invention.

Contents of the invention

The object of the present invention is to provide an automatically adjustable large aspect ratio mold positioning device.

In order to achieve the above object, the technical solution adopted by the present invention is:

An automatically adjustable high-aspect-ratio mold positioning device. The high-aspect-ratio mold includes a female mold and a core rod positioned in the female mold cavity. The high-aspect-ratio mold positioning device includes a spindle, and the spindle is positioned A positioning frame is fixed on the bottom end of the frame, and the positioning frame uses the top end of the core rod as a supporting surface;

It also includes at least three positioning rods evenly distributed around the main shaft, each positioning rod is connected to a connecting rod transmission mechanism, and each connecting rod transmission mechanism is driven by a lifting mechanism; the top end of the positioning rod is used to lean against the The end of the inner wall of the mold cavity against the wall, and its bottom end serves as the clamping end for leaning against the core rod; when in use, the connecting rod transmission mechanism drives the positioning rod to swing, so that the positioning rod The rod is stretched outward so that its wall end is against the inner wall of the mold cavity, and its clamping end is against and clamping the core rod;

Each positioning rod or/and each connecting rod transmission mechanism is limited by the positioning frame, so that the positioning rod is always coplanar with the radius of the spindle, so that the two ends of the positioning rod can be perpendicular to the inner wall of the mold cavity and the outer wall of the spindle. , it is convenient to apply pressure to correct the spindle.

In a further solution, a first roller is provided on the clamping end of the positioning rod, and a second roller is provided on its wall-facing end; through the arrangement of the two rollers, the positioning rod can be positioned when it is in contact with the main shaft and the inner wall of the mold cavity. The friction force is reduced, which facilitates the lifting mechanism to continue to press down and perform the positioning operation of the spindle.

In a further solution, the second roller and the positioning rod are connected through a ratchet and pawl structure, so that the second roller rotates counterclockwise. This arrangement is to ensure that the positioning rod swings clockwise, so that the first roller Find the main shaft upwards, and the second roller downwards to find the inner wall of the cavity.

In a further solution, the lifting mechanism includes a slider slidably arranged along the main axis, and the connecting rod transmission mechanism includes a first pressure rod, a second pressure rod and a third pressure rod; the first pressure rod and the One end of the second pressure rod is hinged to the slider, the other end of the first pressure rod is hinged to one end of the third pressure rod, and the other end of the second pressure rod is connected to the positioning rod through the first guide structure. Sliding connection, the other end of the third pressure rod is hinged with the bottom end of the positioning rod or near the bottom end, and the third pressure rod is slidingly connected with the positioning frame through the second guide structure; wherein:

The third pressure rod is inclined outward from one end hinged with the positioning rod to the other end;

Each positioning rod or/and each third pressure rod is limited by the track groove on the positioning frame, so that the positioning rod is always coplanar with the radius of the main shaft.

The connecting rod transmission mechanism includes a tension state and a compression state;

In the stretched state, the angle between the first pressure rod and the third pressure rod and the angle between the positioning rod and the second pressure rod gradually decrease, and the two sides of the positioning rod The ends are respectively away from the main axis and the inner wall of the mold cavity, that is, the first roller is away from the main axis, and the second roller is away from the inner wall of the mold cavity;

In the compressed state, the angle between the first pressure rod and the third pressure rod and the angle between the positioning rod and the second pressure rod gradually increase, and the two ends of the positioning rod respectively Close to the main shaft and the inner wall of the mold cavity, that is, the first roller is close to the main shaft, and the second roller is close to the inner wall of the mold cavity.

In a further solution, the first guide structure includes a first sliding rod provided at the end of the second pressure rod and a first slide groove provided on the side wall of the positioning rod, and the first sliding rod is connected with the first sliding rod. The first chute is in sliding fit;

The second guide structure includes a second slide groove provided on the side wall of the third pressure rod and a second slide bar provided on the positioning frame. The second slide bar is in sliding fit with the second slide groove. . When the third pressure rod is limited by the rail groove on the edge of the positioning frame, the second sliding rod is arranged on the groove wall of the rail groove.

In a further solution, a limiting column is provided on the side wall of the second pressure rod, and the limiting column extends to the outer edges of the first pressure rod and the third pressure rod, so that the first pressure rod Located outside the second pressure rod, and the angle between the positioning rod and the second pressure rod is an acute angle.

When the first pressure rod is located outside the second pressure rod, it can be ensured that the third pressure rod tilts toward the mold cavity from one end hinged with the positioning rod to the other end. At this time, the third pressure rod is equivalent to In a lever structure, one end of the lever rotates outward and downward under the pressure of the first pressure rod, and the other end rotates inward and upward, so that the first roller of the positioning rod approaches the main shaft.

When the angle between the positioning rod and the second pressure rod is an acute angle, it can be ensured that the positioning rod tilts toward the mold cavity from one end hinged with the third pressure rod to the other end. When the second pressure rod is pressed down, the positioning rod is opened, causing its second roller to approach the inner wall of the cavity of the female mold.

In a further solution, the lifting mechanism further includes a locking structure for locking the slider on the main shaft, and the first pressure rod and the second pressure rod are both hingedly connected to the slider. . When the device is in use, manually move the slider down to compress the connecting rod transmission mechanism; move the slider up to stretch the connecting rod transmission mechanism. Of course, the lifting mechanism can also use some automated lifting equipment, such as cylinders, linear guides, etc.

In a further solution, the large aspect ratio mold positioning device further includes an anti-loose mechanism provided on the slider, the anti-loose mechanism includes a limiter block disposed below the slider, and drives the limiter block. Lifting structure that moves up and down. The edge of the limit block extends to the outside of the slider, and the distance to each second pressure rod is equal. The limit block can be a circular plate, which is the same as the slider and the spindle. Axis settings.

When the connecting rod transmission mechanism needs to be stretched, the limit block can be pushed out to the bottom of the slider through the lifting mechanism to avoid obstacles on the first and second pressure rods; after the connecting rod transmission mechanism shrinks to the position of the main shaft, The limit block can be pulled back through the lifting mechanism, so that the limit block contacts the second pressure rod, restricts the movement of the second pressure rod and applies a load to prevent the device from loosening. On the basis of the locking structure, the stable positioning of the spindle is once again strengthened to facilitate Subsequent loading.

In a further solution, the lifting structure includes a first sleeve, which is linearly slidably arranged between the slide block and the spindle, and is connected to the slide through a first sliding foot and a first sliding rail. The inner wall of the first sleeve is slidably matched. One end of the first sleeve is connected to the limiting block, and the outer wall of the other end is threadedly connected with a first nut. The inner wall of the other end of the first sleeve is also connected to the sliding block through a first rotating structure. block connection;

The locking structure includes a screw hole that runs through the side wall of the slider, a long hole that runs through the side wall of the first sleeve, and a fastening screw. The long hole runs along the side of the first sleeve. The movement direction of the barrel is set and corresponds to the screw hole. The fastening screw is threadedly matched with the screw hole and penetrates the long hole to abut against the outer wall of the main shaft.

In a further solution, the lifting structure includes a second sleeve, a third sleeve, a spring, an L-shaped locking groove and a locking pin; the second sleeve is slidably disposed between the slider and the spindle, And one end of it is connected to the limit block, and the other end is connected to the slider through the spring; the third sleeve is slidably disposed outside the slider, and one end of it is connected to the limit block, The L-shaped locking groove is provided through the outer wall of the third sleeve and slides with the locking pin provided on the slider;

The locking structure includes a push rod, a second nut, a connecting rope, slips and a limiting groove provided on the top surface of the slider; the push rod is slidably disposed between the spindle and the slider, and The second sliding foot and the second slide rail are slidably matched with the inner wall of the slider. One end of the push rod is threadedly connected to the second nut, and the other end is connected to the slip through the connecting rope. The shoe is arranged in the limiting groove and holds the main shaft driven by the push rod; the second nut is connected to the slider through a second rotating structure.

The first rotating structure and the second rotating structure can use bearings, or can use convex rings and annular grooves to cooperate, as long as the second nut/first nut can follow the movement of the slider and does not hinder its own rotation.

When the lifting mechanism adopts automated equipment, the lifting structure and locking structure can be replaced by cylinders, etc.

The working principle and advantages of the present invention are as follows:

This device includes a main shaft and three positioning rods distributed around the main shaft. The positioning rod is connected to a lifting mechanism through a connecting rod transmission mechanism. When positioning the core rod, you only need to press the positioning frame at the bottom of the main shaft against the core rod to drive the lifting mechanism, so that it drives three positioning rods to rotate through three connecting rod transmission mechanisms. During the rotation of the positioning rods, the positioning rod driven by the connecting rod transmission mechanism can automatically use the core rod or the inner wall of the female model cavity as a benchmark to find the core rod or the inner wall of the female model cavity. The inner wall of the female model cavity is used to realize the positioning and eccentricity correction of the core rod; the entire device can also automatically position molds with different inner diameters and core rods with different outer diameters according to the inner diameter of the female model cavity or the outer diameter of the core rod. It is highly versatile and open. The structure is more convenient for loading, can reduce core rod deflection, improve compacting accuracy and reduce powder waste;

The entire device converts all positioning movements into the sliding of the spindle slider, making it easy to operate and easy to install and disassemble.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of Embodiment 1;

Figure 2 is an overall front view of the connecting rod transmission mechanism in the stretched state of Embodiment 1;

Figure 3 is an overall front view of the connecting rod transmission mechanism in the compressed state of Embodiment 1;

Figure 4 is a partial cross-sectional view of the track groove of the positioning frame structure;

Figure 5 is a front view of the lifting mechanism and anti-loosening mechanism of Embodiment 1;

Figure 6 is a cross-sectional view of the lifting mechanism and anti-loosening mechanism of Embodiment 1;

Figure 7 is a front view of the lifting mechanism and anti-loosening mechanism of Embodiment 2;

Figure 8 is a cross-sectional view of the lifting mechanism and anti-loosening mechanism of Embodiment 2.

In the above drawings: 1. Spindle; 2. Positioning frame; 3. Positioning rod; 4. Connecting rod transmission mechanism; 410. First pressure rod; 420. Second pressure rod; 430. Third pressure rod; 440. One guide structure; 450. The second guide structure; 460. Limiting column; 5. Lifting mechanism; 510. Slider; 520. Locking structure; 521. Screw hole; 522. Long hole; 523. Fastening screw; 524. Push rod; 525. Second nut; 526. Connecting rope; 527. Slip; 528. Limit groove; 6. First roller; 7. Second roller; 8. Anti-loose mechanism; 810. Limit block; 820 . Lifting structure; 821. First sleeve; 822. First nut; 823. Second sleeve; 824. Third sleeve; 825. Spring; 826. L-shaped locking groove; 827. Locking pin; 9 core rod ; 10 cavities.

Implementation

The present invention will be further described below in conjunction with the accompanying drawings and examples:

Examples: The following will clearly illustrate this case with drawings and detailed descriptions. After understanding the embodiments of this case, any person skilled in the art can make changes and modifications based on the techniques taught in this case without departing from the spirit of this case. with scope.

The language used herein is for describing particular embodiments only and is not intended to be limiting. Singular forms such as "a", "this", "this", "this" and "the", as used herein, also include the plural forms.

The terms "first", "second", etc. used in this article do not specifically refer to the order or sequence, nor are they used to limit the case. They are only used to distinguish components or operations described with the same technical terms.

As used herein, "connection" or "positioning" may refer to two or more components or devices being in direct physical contact with each other, or being in indirect physical contact with each other, or it may also refer to two or more components or devices operating with each other. or action.

The words "include", "include", "have", etc. used in this article are all open terms, which mean including but not limited to.

Regarding the terms used in this article, unless otherwise noted, they generally have the ordinary meanings of each term used in this field, in the content of this case, and in the special content. Certain terms used to describe the present invention are discussed below or elsewhere in this specification to provide those skilled in the art with additional guidance in describing the present invention.

The words "front", "back", "up", "down", "left", "right", etc. used in this article are all directional terms. In this case, they are only used to illustrate the positional relationship between various structures. , is not used to limit the specific direction of the protection plan and actual implementation of this case.

Example

Referring to Figures 1-6, an automatically adjustable high-aspect-ratio mold positioning device is provided. The high-aspect-ratio mold includes a female mold and a core rod 9 positioned in the female mold cavity 10. The high-aspect-ratio mold The positioning device includes a spindle 1. A positioning frame 2 is fixed on the bottom end of the positioning frame of the main shaft 1. The positioning frame 2 uses the top end of the core rod 9 as a supporting surface;

The large aspect ratio mold positioning device also includes at least three positioning rods 3 evenly distributed around the spindle 1. In this embodiment, four positioning rods 3 are used. The top ends of the positioning rods 3 are used to abut against the The end of the inner wall of the mold cavity 10 is against the wall, and its bottom end is used as a clamping end for abutting against the core rod 9. A first roller 6 is provided on the clamping end of the positioning rod 3, which is against the wall. A second roller 7 is provided at the wall end. The second roller 7 and the positioning rod 3 are connected through a ratchet and pawl structure.

Each positioning rod 3 is connected to a connecting rod transmission mechanism 4, and each connecting rod transmission mechanism 4 is driven by a lifting mechanism 5; under the drive, the connecting rod transmission mechanism 4 drives the positioning rod 3 to swing, so that all the positioning rods 3 swing. The positioning rod 3 is stretched outward so that its wall end is against the inner wall of the mold cavity 10 and its clamping end is against and clamping the core rod 9 .

In this embodiment, the lifting mechanism 5 includes a slider 510 that is slidably arranged along the main shaft 1. The lifting mechanism may also use some automated lifting equipment, such as cylinders, linear guides, etc.

The connecting rod transmission mechanism 4 includes a first pressure rod 410, a second pressure rod 420 and a third pressure rod 430; one end of the first pressure rod 410 and the second pressure rod 420 is hinged to the slider 510 On the top, the other end of the first pressure rod 410 is hingedly connected to one end of the third pressure rod 430, and the other end of the second pressure rod 420 is slidingly connected to the positioning rod 3 through the first guide structure 440. The other end of the pressure rod 430 is hingedly connected to the bottom end of the positioning rod 3 or close to the bottom end, and the third pressure rod 430 is slidingly connected to the positioning frame 2 through the second guide structure 450 .

A limiting column 460 is provided on the side wall of the second pressure rod 420, and the limiting column 460 extends to the outer edges of the first pressure rod 410 and the third pressure rod 430, so that the first pressure rod 410 is located outside the second pressure rod 420, and the angle between the positioning rod 3 and the second pressure rod 420 is an acute angle.

The third pressure rod 430 is inclined outward from one end hinged with the positioning rod 3 to the other end.

Each positioning rod 3 or/and each third pressure rod 430 is limited by the track groove on the positioning frame 2 so that the positioning rod 3 is always coplanar with the radius of the spindle 1 . In this embodiment, rail grooves are provided on the positioning frame 2 corresponding to the positioning rod 3 and the third pressure rod 430 .

Wherein, the first guide structure 440 includes a first sliding rod provided at the end of the second pressure rod 420 and a first slide groove provided on the side wall of the positioning rod 3, and the first sliding rod is connected with the first sliding rod. The first chute is in sliding fit;

The second guide structure 450 includes a second slide groove provided on the side wall of the third pressure rod 430 and a second slide bar provided on the positioning frame 2. The second slide bar is connected with the second slide bar. Grooved slip fit. When the third pressure rod 430 is limited by the rail groove on the edge of the positioning frame 2, the second sliding rod is disposed on the rail groove wall.

The lifting mechanism 5 also includes a locking structure 520 for locking the slider 510 on the spindle 1. The first pressure rod 410 and the second pressure rod 420 are both hingedly connected to the slider. Go to 510.

The large aspect ratio mold positioning device also includes an anti-loose mechanism 8 provided on the slider 510. The anti-loose mechanism 8 includes a limiter block 810 provided below the slider 510, and drives the limiter block 810. 810 is a lifting structure 820 that moves up and down. The edge of the limit block 810 extends to the outside of the slider 510, and the distance to each second pressure rod 420 is equal. The limit block 810 can be a circular plate, which is in contact with the slider 510. Block 510 and spindle 1 are both coaxially arranged.

The lifting structure 820 includes a first sleeve 821, which is slidably disposed between the slider 510 and the spindle 1, and is connected to the slider through a first sliding foot and a first slide rail. 510 inner wall slides together, one end of the first sleeve 821 is connected to the limiting block 810, and the outer wall of the other end is threadedly connected with a first nut 822. The other end of the first sleeve 821 also passes through the first rotating structure on the inner wall. Connected to the slider 510 , the first rotating structure includes an annular groove and a convex ring. An annular groove is provided on the inner wall of the front end of the first nut 822 , and the annular groove rotates with the convex ring provided on the top outer wall of the slider 510 Cooperate;

The locking structure 520 includes a screw hole 521 that penetrates the side wall of the slider 510, a long hole 522 that penetrates the side wall of the first sleeve 821, and a fastening screw 523. 522 is provided along the moving direction of the first sleeve 821 and corresponds to the screw hole 521. The fastening screw 523 is threadedly matched with the screw hole 521 and penetrates the long hole 522 to abut against the main shaft 1 outer wall.

The steps to use the entire device are as follows:

Rotate the first nut 822, the first sleeve 821 moves straight down under the limit of the first sliding foot and the first slide rail, and push the limiting block 810 to the bottom of the sliding block 510, away from the top of the second pressure rod 420. Prepare for the stretching and adduction of the first compression bar 410 and the second compression bar 420 .

Pull up the slider 510 to drive the first pressure rod 410 and the second pressure rod 420 to move upward, allowing the first pressure rod 410 and the positioning rod 3 to contact the limiting post 460 on the second pressure rod 420 to initialize the device. The rod transmission mechanism is in tension.

Place the lower surface of the positioning frame 2 on the top surface of the core rod 9, move the slider 510 downward, and drive the first pressure rod 410 and the second pressure rod 420 to move downward. At this time, the rod transmission mechanism is in a compressed state.

When the second pressure rod 420 moves downward, it moves downward along the first chute of the positioning rod 3. Since there is a certain oblique angle between the second pressure rod 420 and the positioning rod 3, the second pressure rod 420 slides downward at the same time. The positioning rod 3 will be stretched outward, so that the second roller 7 at the top is close to the inner wall of the cavity 10 of the female mold;

When the first pressure rod 410 moves downward, the third pressure rod 430 is pressed downward, so that the third pressure rod 430 moves downward along the second slide groove, and swings under the positioning of the second slide rod, so that the third pressure rod 430 moves downward. The bottom end of 430 drives the first roller 6 at the bottom end of the positioning rod 3 to approach the core rod 9. At this time, the second roller 7 is slightly away from the inner wall of the cavity 10 of the female mold.

When the core rod 9 is eccentric and the device is placed on its top, it will also be in an eccentric state. At this time, the distance between each positioning rod 3 and the inner wall of the female mold is different. In the process of the positioning rod 3 being gradually stretched, the end of the positioning rod 3 will be in an eccentric state. It is uncertain whether the roller contacts the core rod 9 or the inner wall of the female mold first, and the order in which each positioning rod 3 contacts the core rod 9 or the inner wall of the female mold is also different.

When the first roller 6 of the positioning rod 3 first contacts the core rod 9 but the second roller 7 does not contact the inner wall of the female mold, the slider 510 continues to press down, driving the first pressure rod 410 and the second pressure rod 420 downward. movement, the first pressure rod 410 transmits pressure to the third pressure rod 430. When the second slide groove of the third pressure rod 430 is limited by the second slide rod and cannot continue to move downward along the second slide rod, the third pressure rod 430 moves downward. The rod 430 can only rotate under pressure; since the first roller 6 and the core rod 9 are in contact at this time, the third pressure rod 430 will move upward and outward along the second chute under the guidance of the first roller 6 (i.e., eversion), and then drives the positioning rod 3 to move upward and outward (i.e., eversion), and the second roller 7 gradually approaches the inner wall of the female mold. At this time, the positioning rod 3 gradually approaches the horizontal posture based on the core rod 9, looking for The inner wall of the female mold; after finding the inner wall of the female mold, continue to press the slider 510, the positioning rod 3 will use the inner wall of the female mold as a reference to push the core rod 9 inward. As each positioning rod 3 opens, the positioning rod 3 will move in different directions. The positioning rod 3 will successively contact the inner wall of the female mold. The rollers at both ends of the positioning rod 3 are respectively against the core rod 9 and the inner wall of the female mold. The slider 510 cannot be pressed down. The device tends to be stable. At this time, the eccentric core rod 9 is corrected. to the center of cavity 10.

Finally, the fastening screw 523 is rotated, and the fastening screw 523 penetrates the long hole 522 and abuts against the outer wall of the spindle 1 to lock the slider 510; then the first nut 822 is rotated in the opposite direction, so that the first sleeve 821 drives the limit block 810 upward. Move until the limiting block 810 contacts the second pressure rod 420, restricting the movement of the second pressure rod 420 and applying a load to prevent the device from loosening. The locking structure 520 and the anti-loosening mechanism 8 cooperate to fix the slider 510 so that it cannot move upward, thereby ensuring the stability of the device.

Of course, the length of the positioning rod 3 must be greater than the radius of the cavity 10 of the female mold. When the length of the positioning rod 3 is close to the radius of the cavity 10, the expanded positioning rod 3 will be closer to a horizontal state.

When the positioning rod 3 gradually becomes horizontal, the positions of the second pressure rod 420 and the positioning rod 3 tend to be vertical, and the pressure will give priority to supporting the positioning rod 3 instead of moving downward along the first chute.

When the second roller 7 of the positioning rod 3 first contacts the inner wall of the female mold, but the first roller 6 does not contact the core rod 9, the slider 510 that continues to press down continues to drive the first pressure rod 410 and the second pressure rod 420 downward. movement, the second pressure rod 420 moves downward and gradually opens the positioning rod 3, so that the positioning rods 3 in all directions contact the inner wall of the female mold one after another. In this process, the position of the spindle 1 will be automatically adjusted based on the inner wall of the female mold;

When all the second rollers 7 of the positioning rods 3 are in contact with the inner wall of the female mold, the downward pressure of the second pressure rod 420 cannot continue to open the positioning rods 3, and can only make the second pressure rod 420 slide along the first slide of the positioning rod 3. The groove moves downward, causing the first roller 6 of the positioning rod 3 to slowly lift up and approach the core rod 9. At this time, the positioning rod 3 gradually approaches the horizontal posture based on the inner wall of the female mold, and the third pressure rod 430 is in the first pressure position. Under the joint action of the rod 410 and the second pressure rod 420, the rod 410 rotates around the hinge and moves upward, gradually approaching the core rod 9 and adjusting the position of the core rod 9;

Since the second rollers 7 of all positioning rods 3 are first in contact with the inner wall of the female mold, under the downward pressure of the second pressure rod 420, when the positioning rod 3 gradually approaches the horizontal attitude, it will drive the first roller 6 to eccentrically The core rod 9 is pushed toward the center of the cavity 10 until all the first rollers 6 are in contact with the core rod 9. At this time, the core rod 9 is positioned, the device becomes stable, and the slider 510 is restricted from continuing to move downward;

Finally, the slider 510 is fixed by the locking structure 520 and the anti-loosening mechanism 8 so that it cannot move upward to ensure the stability of the device, and the loading can be carried out.

When the device is finished using, you only need to loosen the fastening nut and the limiting block 810, and lift the slider 510 to easily remove the device.

Example

This embodiment is basically the same as Embodiment 1, with the difference (see Figures 7-8): the lifting structure 820 includes a second sleeve 823, a third sleeve 824, a spring 825, an L-shaped locking groove 826 and a locking pin. 827; The second sleeve 823 is slidably disposed between the slider 510 and the spindle 1, and one end thereof is connected to the limiting block 810, and the other end is connected to the slider 510 through the spring 825. Connection; the third sleeve 824 is slidably disposed outside the slider 510, and one end thereof is connected to the limiting block 810, and the L-shaped locking groove 826 is disposed through the outer wall of the third sleeve 824 and It is slidably matched with the locking pin 827 provided on the slider 510 .

The locking structure 520 includes a push rod 524, a second nut 525, a connecting rope 526, a slip 527 and a limiting groove 528 provided on the top surface of the slider 510; the push rod 524 is slidably provided on the spindle 1 between the slider 510 and the slider 510, and slidingly cooperates with the inner wall of the slider 510 through the second slider foot and the second slide rail. One end of the push rod 524 is threadedly connected to the second nut 525, and the other end is threaded through the second slider 510. The connecting rope 526 is connected to the slip 527, which is disposed in the limiting groove 528 and holds the spindle 1 driven by the push rod 524; the second nut 525 passes through The second rotating structure is connected to the slider 510 .

In this embodiment, the second rotating structure includes an annular groove and a convex ring. The inner wall of the front end of the second nut 525 is provided with an annular groove. The annular groove rotates with the convex ring provided on the outer wall of the top end of the slider 510 .

In this embodiment, when the limit block 810 extends to the bottom of the slider 510, the third sleeve 824 can be pulled down. The third sleeve 824 drives the limit block 810 and the second sleeve 823 to move downward. At this time, the spring 825 is pulled When the limit block 810 moves down and is in place, the locking pin 827 corresponds to the right-angle turning point of the L-shaped locking groove. The third sleeve 824 is rotated so that the locking pin 827 is locked at the bottom of the longitudinal groove of the L-shaped locking groove. , at this time, the position of the limiting block 810 is limited, and the sliding block 510 can be moved downward.

When the limiting block 810 needs to move upward, the third sleeve 824 is rotated in the reverse direction, and the locking pin 827 enters the transverse linear groove of the L-shaped locking groove. Under the action of the spring 825, the limiting block 810 moves upward and connects with the second sleeve 824. The pressure rod 420 contacts, restricts the movement of the second pressure rod 420 and applies a load to prevent the device from loosening.

When the slider 510 needs to be locked, the second nut 525 is rotated, and the ejector pin 524 drives the ejector pin 524 downward under the limit of the second sliding foot and the second slide rail. The ejector pin 524 resists the slip 527, causing the slip. 527 holds the spindle 1 tightly to fix the slider 510.

The above embodiments are only for illustrating the technical concepts and characteristics of the present invention. Their purpose is to enable those familiar with this technology to understand the content of the present invention and implement it accordingly. They cannot limit the scope of protection of the present invention. All equivalent changes or modifications made based on the spirit and essence of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An automatically adjustable high-height-diameter-ratio die positioning device, wherein the high-height-diameter-ratio die comprises a female die and a core bar (9) positioned in a female die cavity (10), and is characterized in that the high-height-diameter-ratio die positioning device comprises a main shaft (1), and a positioning frame (2) is fixedly arranged at the bottom end of the main shaft (1);

the device also comprises at least three positioning rods (3) uniformly distributed around the main shaft (1), wherein each positioning rod (3) is respectively connected with a connecting rod transmission mechanism (4), and each connecting rod transmission mechanism (4) is driven by a lifting mechanism (5); the top end of the positioning rod (3) is used as a wall abutting end for abutting against the inner wall of the cavity (10), and the bottom end of the positioning rod is used as a clamping action end for abutting against the core rod (9); when the die is used, the connecting rod transmission mechanism (4) drives the positioning rod (3) to swing so as to lead the positioning rod (3) to be outwards spread, the abutting wall end of the positioning rod is abutted against the inner wall of the die cavity (10), and the clamping action end of the positioning rod is abutted against the core rod (9);

each positioning rod (3) or/and each connecting rod transmission mechanism (4) is limited by the positioning frame (2), so that the positioning rods (3) are coplanar with the radius of the main shaft (1) all the time.

2. An automatically adjustable high aspect ratio die positioning device as in claim 1, wherein: the clamping action end of the positioning rod (3) is provided with a first roller (6), and the wall supporting end of the positioning rod is provided with a second roller (7).

3. An automatically adjustable high aspect ratio die positioning device as in claim 2, wherein: the second roller (7) is connected with the positioning rod (3) through a ratchet and pawl structure, so that the second roller (7) rotates anticlockwise.

4. An automatically adjustable high aspect ratio die positioning device as in claim 1, wherein: the lifting mechanism (5) comprises a sliding block (510) which is arranged in a sliding way along the main shaft (1), and the connecting rod transmission mechanism (4) comprises a first pressing rod (410), a second pressing rod (420) and a third pressing rod (430); one end of the first pressing rod (410) and one end of the second pressing rod (420) are hinged to the sliding block (510), the other end of the first pressing rod (410) is hinged to one end of the third pressing rod (430), the other end of the second pressing rod (420) is slidably connected with the positioning rod (3) through a first guide structure (440), the other end of the third pressing rod (430) is hinged to the bottom end or a position close to the bottom end of the positioning rod (3), and the third pressing rod (430) is slidably connected with the positioning frame (2) through a second guide structure (450); wherein:

the third compression bar (430) is inclined outwards from one end hinged with the positioning bar (3) to the other end;

each positioning rod (3) or/and each third pressing rod (430) is limited by a rail groove on the positioning frame (2), so that the positioning rods (3) are coplanar with the radius of the main shaft (1) all the time.

5. An automatically adjustable high aspect ratio die positioning device as in claim 4, wherein: the first guide structure (440) comprises a first sliding rod arranged at the end part of the second compression rod (420) and a first sliding groove arranged on the side wall of the positioning rod (3), and the first sliding rod is in sliding fit with the first sliding groove;

the second guide structure (450) comprises a second sliding groove arranged on the side wall of the third compression bar (430) and a second sliding bar arranged on the locating frame (2), and the second sliding bar is in sliding fit with the second sliding groove.

6. An automatically adjustable high aspect ratio die positioning device as in claim 4, wherein: the side wall of the second pressing rod (420) is provided with a limiting column (460), the limiting column (460) extends to the outer side edges of the first pressing rod (410) and the third pressing rod (430), so that the first pressing rod (410) is located at the outer side of the second pressing rod (420), and an included angle between the positioning rod (3) and the second pressing rod (420) is an acute angle.

7. An automatically adjustable high aspect ratio die positioning device as in claim 4, wherein: the lifting mechanism (5) further comprises a locking structure (520) for locking the sliding block (510) on the main shaft (1), and the first pressing rod (410) and the second pressing rod (420) are both hinged on the sliding block (510).

8. An automatically adjustable high aspect ratio die positioning device as in claim 7, wherein: the anti-loosening device is characterized by further comprising an anti-loosening mechanism (8) arranged on the sliding block (510), wherein the anti-loosening mechanism (8) comprises a limiting block (810) arranged below the sliding block (510) and a lifting structure (820) for driving the limiting block (810) to move up and down, the edge of the limiting block (810) extends to the outside of the sliding block (510), and the distance between the limiting block and each second pressing rod (420) is equal.

9. An automatically adjustable high aspect ratio die positioning device as in claim 8, wherein: the lifting structure (820) comprises a first sleeve (821), the first sleeve (821) is arranged between the sliding block (510) and the main shaft (1) in a sliding mode, one end of the first sleeve (821) is connected with the limiting block (810), the outer wall of the other end of the first sleeve is connected with a first nut (822) in a threaded mode, and the inner wall of the other end of the first sleeve (821) is connected with the sliding block (510) through a first rotating structure;

the locking structure (520) comprises a screw hole (521) penetrating through the side wall of the sliding block (510), a long hole (522) penetrating through the side wall of the first sleeve (821) and a fastening screw (523), wherein the long hole (522) is arranged along the moving direction of the first sleeve (821) and corresponds to the screw hole (521), and the fastening screw (523) is in threaded fit with the screw hole (521) and penetrates through the long hole (522) to abut against the outer wall of the main shaft (1).

10. An automatically adjustable high aspect ratio die positioning device as in claim 8, wherein: the lifting structure (820) comprises a second sleeve (823), a third sleeve (824), a spring (825), an L-shaped locking groove (826) and a locking pin (827); the second sleeve (823) is arranged between the sliding block (510) and the main shaft (1) in a sliding mode, one end of the second sleeve is connected with the limiting block (810), and the other end of the second sleeve is connected with the sliding block (510) through the spring (825); the third sleeve (824) is arranged outside the sliding block (510) in a sliding way, one end of the third sleeve is connected with the limiting block (810), and the L-shaped locking groove (826) penetrates through the outer wall of the third sleeve (824) and is in sliding fit with the locking pin (827) arranged on the sliding block (510);

the locking structure (520) comprises a push rod (524), a second nut (525), a connecting rope (526), slips (527) and a limiting groove (528) arranged on the top end face of the sliding block (510); the ejector rod (524) is arranged between the main shaft (1) and the sliding block (510) in a sliding manner, one end of the ejector rod is in threaded connection with the second nut (525), the other end of the ejector rod is connected with the slip (527) through the connecting rope (526), and the slip (527) is arranged in the limiting groove (528) and is driven by the ejector rod (524) to clamp the main shaft (1); the second nut (525) is connected with the slider (510) through a second rotating structure.