CN219430056U - Size-adjustable pressing die - Google Patents

Abstract

The utility model discloses a size-adjustable pressing die, which relates to the field of heat treatment quenching technology, and comprises an upper top plate, a lower bottom plate and an inner tube arranged between the upper top plate and the lower bottom plate, wherein the inner tube comprises an inner die and an outer die; the inner mold comprises a cone formed by a plurality of laminated cone sheets, and the outer mold comprises a plurality of sliding blocks; the end surface of the sliding block facing the cone is an inclined surface attached to the cone; one end surface of the sliding block, which is away from the cone, is a working surface for supporting the inner wall of the limiting annular workpiece; the lower bottom plate is provided with a supporting cylinder, a hollow area arranged in the supporting cylinder is vertically and slidably provided with an upper supporting plate for supporting the inner die, and a supporting and adjusting mechanism with adjustable thickness is arranged between the upper supporting plate and the lower bottom plate. The utility model solves the problem of how to conveniently adjust the size of the pressing die without changing the conical sheet and the sliding block, so as to be suitable for workpieces with more sizes.

Description

Size-adjustable pressing die

Technical Field

The utility model relates to the field of heat treatment quenching technology, in particular to a size-adjustable pressing die.

Background

The heat treatment of the bearing sleeve is critical to the dimensional stability, fatigue, stress and the like of the bearing sleeve in the use process. Carburization treatment can greatly improve the service performance of the bearing. After carburization, the bearing sleeve needs to be quenched for the second time, namely, the carburized workpiece is heated to a certain temperature and kept for a certain time, and then cooled at a proper speed, so that the material with the high-carbon martensite on the surface and the lath martensite inside is obtained.

The greater the deformation of the bearing housing after heat treatment, the more material needs to be removed in subsequent machining to achieve the desired dimensional and shape tolerances. Therefore, the reduction of the deformation of the bearing sleeve after heat treatment can reduce the subsequent machining cost, and meanwhile, the uniform thickness of the carburized layer of the bearing sleeve can also be maintained, so that the service life of the bearing is prolonged.

CN110184433a discloses a combined stamper;

CN109722515a discloses a stamper;

CN109943694a discloses a stamper;

CN109943702a discloses a rotary quenching system;

the basic principle of the quenching device is that an inner die and an outer die are arranged, the inner die is conical, the periphery of the outer die is used for placing a workpiece, and before quenching, the conical inner die is embedded into the outer die, so that the outer die moves outwards to tighten the workpiece, and the workpiece is not easy to deform in the quenching process.

However, in the compression molding schemes disclosed in the above several patents, there are the following problems:

1) The upper and lower bottom surfaces of the sliding block of the outer die are embedded into the slide ways arranged on the pressing plate, so that the contact area is small, the stability is poor, and the sliding block is easy to fall down, thereby influencing the quenching stability.

2) When the caliber of the workpiece to be processed is changed, the size of the inner die needs to be changed, which is very inconvenient.

3) For how to enable the inner die to be embedded into the outer die, the scheme disclosed in CN110184433A is that a telescopic rod mechanism is used for pushing the inner die so as to enable the inner die to be embedded into the outer die, in the mode, the telescopic rod mechanism is arranged to be a worm jack, compaction can be achieved only by using the movement of a screw-driven worm jack, the structure is complex, and a plurality of screw-driven mechanisms are easy to interfere with other operation steps; and in the process of rotating in the pool after the compaction is finished, a sufficient compaction force cannot be provided because the compaction is performed only by the form of the screw thread. The hydraulic jack is difficult to replace because the oil delivery pipe is easy to twist during rotation.

4) In the prior patent, such as CN109943702a, the material returning mechanism is integrally arranged in the pressing die, and the material returning mechanism is carried with the quenching process in the quenching process, so that the pressing die structure and the quenching process are too complex, and the operation difficulty in the quenching process is high. In practice, the material-returning mechanism can be completely independently arranged in the space outside the pressing die and can be used when material returning and workpiece replacement are required, and the material-returning mechanism does not need to be integrally arranged in the pressing die, but the system is required to be improved to meet the material-returning mode.

Disclosure of Invention

The utility model aims to provide a size-adjustable pressing die for solving the second problem in the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the inner tube comprises an upper top plate, a lower bottom plate and an inner tube arranged between the upper top plate and the lower bottom plate, wherein the inner tube comprises an inner die and an outer die; the inner mold comprises a cone formed by a plurality of laminated cone sheets, and the outer mold comprises a plurality of sliding blocks; the end surface of the sliding block facing the cone is an inclined surface attached to the cone; one end surface of the sliding block, which is away from the cone, is a working surface for supporting the inner wall of the limiting annular workpiece;

the cone periphery is provided with a hollow limit cylinder with thickness in a surrounding manner, a plurality of slide ways are radially arranged at the thickness position of the limit cylinder, and the slide blocks are connected with the slide ways in a sliding manner along the radial direction of the limit cylinder through key positions.

The slide way is uniformly and radially arranged along the radial direction of the limit cylinder.

The cone sheet is of a polygonal configuration, and the caliber of the cone sheet is gradually changed along the vertical direction.

The number of the sliding ways is the same as that of the edges of the conical sheets, and each sliding way is perpendicular to one edge of the conical sheet in a one-to-one correspondence manner.

The bottom surface of the limit cylinder is aligned and fixed above the thickness position of one support cylinder and forms an integral fixed cylinder together with the support cylinder, and the fixed cylinder is arranged above the lower bottom plate.

The supporting cylinder is connected with the lower bottom plate through a bolt with a vertical play gap; a material returning rod which is embedded in the lower bottom plate in a sliding way is arranged right below the thickness position of the supporting cylinder.

An anti-falling boss limit structure is arranged between the material returning rod and the embedded opening of the lower bottom plate.

Two inner side surfaces of each slideway are provided with convex key positions extending along the radial direction, two outer side surfaces of the sliding block are provided with concave key positions aligned with the convex key positions, and the convex key positions are in embedded sliding connection with the concave key positions.

The upper surface of the lower bottom plate is provided with a workpiece bottom supporting structure with adjustable thickness for supporting a workpiece.

The workpiece bottom supporting structure comprises a third adjusting pad with adjustable thickness and a workpiece bottom supporting block arranged above the third adjusting pad.

One end face of the sliding block, which is away from the cone, is provided with a workpiece inner wall supporting structure for supporting and contacting the workpiece inner wall.

The workpiece inner wall supporting structure comprises a first adjusting pad with adjustable thickness and a workpiece inner wall supporting block fixed outside the first adjusting pad.

The hollow area arranged in the supporting cylinder is vertically and slidably provided with an upper supporting plate for supporting the inner die, and a supporting and adjusting mechanism with adjustable thickness is arranged between the upper supporting plate and the lower bottom plate.

The lower support plate is arranged below the upper support plate, a fourth adjusting pad with adjustable thickness is arranged between the lower support plate and the upper support plate, and the lower support plate is arranged on the lower bottom plate.

The sliding groove is vertically formed in the inner side wall of the supporting cylinder, the upper supporting plate is provided with a sliding block in a protruding mode at the corresponding position of the sliding groove, and the sliding block is embedded in the sliding groove.

The compression mold is arranged in mirror symmetry relative to a horizontal symmetry plane, and the upper part and the lower part of the symmetry plane comprise complete inner tubes.

A second adjusting pad with adjustable thickness is arranged between the two symmetrical inner tubes.

Compression mould compressing mechanism: the pressing die comprises an upper top plate, a lower bottom plate and inner tubes arranged between the upper top plate and the lower bottom plate, wherein the inner tubes are arranged into a single group or an upper group and a lower group, and each group of inner tubes comprises an inner die and an outer die; the pressing mechanism comprises a supporting top plate and a supporting bottom plate, the pressing die is arranged in the supporting top plate, the lower bottom plate is detachably fixed above the supporting bottom plate, and the supporting top plate is supported on the supporting bottom plate through a supporting column with adjustable height;

the supporting bottom plate is rotationally connected to the lifting base through a bearing, and a fixed frame is erected on the lifting base;

a jack positioned above the upper top plate is hung below the supporting top plate, and a jack hydraulic oil pipe of the jack passes through the upper part of the supporting top plate and is connected with a rotating end of a hydraulic rotating joint; the fixed end shell of the hydraulic rotary joint is fixed on the fixed frame; the fixed end of the hydraulic rotary joint is communicated with the hydraulic station through an external oil way, and the jack hydraulic oil pipe is communicated with the external oil way.

The support column is sleeved with a fifth adjusting pad with adjustable thickness, and the support top plate is supported and arranged above the fifth adjusting pad.

Each support column comprises an upper section and a lower section, and the upper section is connected with the lower section through threads so as to adjust the length of the support column.

The lifting base is connected to the telescopic end of the vertical lifting hydraulic cylinder.

The fixed end of the lifting hydraulic cylinder is fixed on a fixed base.

The material returning mechanism comprises: the inner tube comprises an inner mold and an outer mold; the inner mold comprises a cone formed by a plurality of laminated cone sheets, and the outer mold comprises a plurality of sliding blocks; the end surface of the sliding block facing the cone is an inclined surface attached to the cone; one end surface of the sliding block, which is away from the cone, is a working surface for supporting the inner wall of the limiting annular workpiece;

a separable pressing mechanism is arranged above the upper top plate;

a lower material returning hole is formed in the lower bottom plate in a penetrating manner, and a lower material returning rod for pushing the inner die or the outer die to release the locking state of the outer die and the workpiece is arranged through the lower material returning hole; a limiting mechanism for preventing the blanking rod from falling is arranged at the blanking hole;

the lower bottom plate is arranged on two first guide rails in a sliding mode, the first guide rails are fixed on a lifting rotating platform, and the lifting rotating platform is arranged above the quenching bath; the lower material returning rod is positioned in the area between the two first guide rails;

two second guide rails which are positioned on the same horizontal plane with the first guide rails are arranged outside the lifting rotary platform, a lower material returning mechanism is arranged in a lower area between the two second guide rails, and comprises a lower top moving block for pushing a lower material returning rod and a lower power mechanism for pushing the lower top moving block;

and a feeding hydraulic cylinder for pulling the pressing die to horizontally move is arranged outside the lifting rotating platform.

The inner tube is arranged in mirror symmetry relative to a horizontal symmetry plane, and the upper part and the lower part of the symmetry plane are respectively a separable upper inner tube and a separable lower inner tube.

A second adjusting pad with adjustable thickness is arranged between the upper inner tube and the lower inner tube.

An upper material returning hole is formed in the upper top plate in a penetrating manner, and an upper material returning rod for pushing an inner die or an outer die in the upper tire membrane is arranged through the material returning hole so as to release the locking state of the outer die and the workpiece; the upper material returning hole is provided with a limiting mechanism for preventing the lower material returning rod from falling.

And an upper material returning mechanism is arranged in the upper area between the two second guide rails and comprises an upper pushing block for pushing the upper material returning rod from top to bottom and an upper power mechanism for pushing the upper pushing block from top to bottom.

The lower power mechanism is a lower hydraulic jack which is arranged below the lower jacking moving block.

The upper power mechanism is an upper hydraulic jack which is arranged above the upper top movable block.

The upper material returning mechanism is connected with a material returning lifting hydraulic cylinder.

The upper material returning mechanism is provided with symmetrical supporting frame plates, and when the pressing die moves to the upper material returning mechanism, the upper top plate is embedded and supported on the supporting frame plates.

The upper material returning mechanism is arranged right above the lower material returning mechanism.

The upper material returning mechanism is arranged on the lower material returning mechanism through a working frame.

The fixed end of the feeding hydraulic cylinder and the fixed end of the material returning lifting hydraulic cylinder are both fixed on the working frame, and the telescopic end of the material returning lifting hydraulic cylinder is vertically fixed on the feeding and returning mechanism downwards.

The outside of lower plate is connected in the pull rod work piece of an L type, has seted up U type sunk mouth on the lateral wall of pull rod work piece, and the feeding hydraulic cylinder telescopic link of feeding hydraulic cylinder passes and connects in a pull rod stopper behind U type sunk mouth, and the horizontal direction of pull rod stopper is spacing between the lateral wall of pull rod work piece and the lateral wall of lower plate.

And a placing area for replacing the workpiece by the pressing die is reserved between the blanking mechanism and the lifting rotary platform.

The lower material returning mechanism comprises a lower frame body fixed on the fixed platform, the lower power mechanism is fixed in the lower frame body, a lower fixed block with a cross groove is hung on the lower frame body, a lower top moving block is embedded in the cross groove, and the lower top moving block is a lower cross block.

The upper material returning mechanism comprises an upper frame body, the upper power mechanism is fixed in the upper frame body, an upper fixing block with a cross groove is hung below the upper power mechanism, an upper top moving block is embedded in the cross groove, and the upper top moving block is an upper cross block.

The lower part of the upper cross block is provided with a return spring in a surrounding way, and a fixed limiting plate is arranged below the return spring.

The utility model has the advantages compared with the prior art that:

1. the utility model is provided with the limit cylinder with thickness, the slide way is radially arranged at the thick wall of the limit cylinder, the key position is arranged at the slide way, the slide block moves in the slide way, and the side surface of the slide block is contacted with the slide way in a large area, so that the slide block is more stable. In the prior art, the upper bottom surface and the lower bottom surface of the sliding block are embedded into the slideway arranged on the pressing plate, so that the contact area is small, the stability is poor, and the sliding block is easy to fall down.

2. The middle cone sheet can be pushed by the upper supporting plate to slide up and down, so that the size of a workpiece can be conveniently adjusted only by sliding up and down. In addition, a first adjusting pad is also arranged and can also be used for adjusting the size of the workpiece. In the prior art, the workpiece size can only be adjusted by changing the size of the cone or the slide.

3. According to the utility model, the compression of the compression mold can be realized by arranging the hydraulic jack and the hydraulic rotary joint, and the compression can still be realized in the rotation of the platform, so that on one hand, the structure is obviously simplified, and the other convenient compression effect is better. The original mechanism is provided with a telescopic rod or a worm jack, the compaction can be realized by screwing the worm jack to move, the structure is complex, and the screwing mechanisms which are arranged in a plurality of ways are easy to interfere other operation steps; and in the process of rotating in the pool after the compaction is finished, a sufficient compaction force cannot be provided because the compaction is performed only by the form of the screw thread. The hydraulic jack is difficult to replace, because the oil delivery pipe is easy to twist in the rotating process, and the hydraulic rotary joint is adopted in the utility model to solve the problem.

4. In the utility model, the upper jack and the lower jack for discharging are arranged outside the pressing die, and the pressing die is moved to the discharging position through the guide rail, so that compared with the original mode of arranging the discharging mechanism at the die, the structure is simpler, and the operation is more convenient. Because no material withdrawal is required during the quenching stage and lifting, rotation, etc. of the platform are required, the lighter the components on the platform during the working stage, the simpler the structure. According to the utility model, the jack used for the material returning part is placed outside, and the material returning can be rapidly completed outside the working pool by combining a material returning rod, a cylinder part and the like which are preset in the pressing die. The upper die and the lower die are arranged in a separable mode, so that the upper die can be taken out firstly in the material returning process, and the workpiece can be taken out conveniently. The supporting frame plate is also arranged to facilitate the clamping of the upper die at the upper material returning mechanism.

Drawings

FIG. 1 is a side view of a stamper of the present utility model;

FIG. 2 is a side view of the stationary cylinder of the present utility model;

FIG. 3 is a top view of the stationary cylinder of the present utility model;

FIG. 4 is a side view of the cone of the present utility model;

FIG. 5 is a top view of the cone of the present utility model;

FIG. 6 is an end view of a slider of the present utility model;

FIG. 7 is a side view of the slider of the present utility model;

FIG. 8 is a top view of the slider of the present utility model;

FIG. 9 is a side view of the body of the hold-down mechanism of the present utility model;

FIG. 10 is a general side view of the hold-down mechanism of the present utility model;

FIG. 11 is a schematic view of the die of the present utility model lowered into a vessel with a heat treatment liquid for quenching;

FIG. 12 is a schematic view of a single-layer stamper of the present utility model for cylindrical workpieces;

FIG. 13 is a schematic view of a bi-layer stamper of the present utility model for conical workpieces;

FIG. 14 is a schematic view of a single-layer stamper of the present utility model for conical workpieces;

FIG. 15 is a side view of the utility model prior to material withdrawal;

FIG. 16 is a side view of the present utility model during a reject process;

FIG. 17 is a side view of the present utility model with the workpiece replaced after material withdrawal;

fig. 18 is a left side view of the upper stripper mechanism of fig. 17;

fig. 19 is a top view of the present utility model.

In the figure, 1, an upper top plate, 2, a lower bottom plate, 3, a supporting cylinder, 4, a conical sheet, 5, a sliding block, 6, a first adjusting pad, 7, a workpiece inner wall supporting block, 8, a workpiece, 9, a second adjusting pad, 10, a third adjusting pad, 11, a workpiece bottom supporting block, 12, an upper supporting plate, 13, a lower supporting plate, 14, a fourth adjusting pad, 15, a material returning rod, 16, a limiting cylinder, 17, a convex key position, 18, a slideway, 19, a chute, 20 and a concave key position; 30. the support top plate, 31, the support bottom plate, 32, the support columns, 33, the inner mold, 34, the outer mold, 35, the hydraulic rotary joint, 36, the jack, 37, the jack hydraulic oil pipe, 38, the fifth adjusting pad, 39, the lifting hydraulic cylinder, 40, the fixed base, 41, the lifting base, 42, the bearing, 43 and the fixed frame; 51. the automatic feeding device comprises a motor, 52, a gear box, 53, a toothed bottom plate, 54, a first guide rail, 55, a second guide rail, 56, a feeding hydraulic cylinder telescopic rod, 57, a pull rod working block, 58, a pull rod limiting block, 59, an upper frame body, 60, an upper power mechanism, 61, a material returning lifting hydraulic cylinder, 62, a working frame, 63, a lower power mechanism, 64, a lower cross block, 65, a lower fixed block, 66, an upper cross block, 67, an upper power block, 68, a return spring, 69, a feeding hydraulic cylinder, 70 and a supporting frame plate.

Detailed Description

The following describes specific embodiments of the present utility model with reference to the drawings.

As shown in fig. 1 to 19, the present utility model comprises an upper top plate 1, a lower bottom plate 2, and an inner tube disposed between the upper top plate 1 and the lower bottom plate 2, the inner tube comprising an inner mold 33 and an outer mold 34; the inner mold 33 includes a cone composed of a plurality of laminated cone sheets 4, and the outer mold 34 includes a plurality of sliders 5; one end face of the sliding block 5 facing the cone is an inclined face attached to the cone; one end surface of the sliding block 5, which is away from the cone, is a working surface for supporting the inner wall of the limiting annular workpiece 8;

the cone periphery is provided with a hollow limit cylinder 16 with thickness in a surrounding way, a plurality of slide ways 18 are radially arranged at the thickness position of the limit cylinder 16, and the slide blocks 5 are connected with the slide ways 18 in a sliding way along the radial direction of the limit cylinder 16 through key positions.

The slide 18 is uniformly radially disposed along the radial direction of the stopper cylinder 16.

The conical sheet 4 is of a polygonal configuration, and the caliber of the conical sheet 4 is gradually changed along the vertical direction.

The number of the slide ways 18 is the same as that of the sides of the conical sheet 4, and each slide way 18 is arranged perpendicular to one side of the conical sheet 4 in a one-to-one correspondence.

The bottom surface of the limit cylinder 16 is aligned and fixed above the thickness position of one support cylinder 3 and forms a whole together with the support cylinder 3, and the fixed cylinder is arranged above the lower bottom plate 2.

The supporting cylinder 3 is connected with the lower bottom plate 2 through a bolt with a vertical play gap; a material returning rod 15 which is embedded in the lower bottom plate 2 in a sliding way is arranged right below the thickness position of the supporting cylinder 3.

A boss limiting structure for preventing falling is arranged between the material returning rod 15 and the embedded opening of the lower bottom plate 2.

Two inner side surfaces of each slideway 18 are provided with convex key positions 17 extending along the radial direction, two outer side surfaces of the sliding block 5 are provided with concave key positions 20 aligned with the convex key positions 17, and the convex key positions 17 are in embedded sliding connection with the concave key positions 20.

The upper surface of the lower plate 2 is provided with a workpiece bottom support structure of adjustable thickness for supporting a workpiece 8.

The workpiece bottom support structure includes a third conditioner mat 10 of adjustable thickness and a workpiece bottom support block 11 disposed above the third conditioner mat 10.

An end face of the slider 5 facing away from the cone is provided with a workpiece inner wall supporting structure for supporting an inner wall of the workpiece 8 in contact therewith.

The workpiece inner wall supporting structure comprises a first adjusting pad 6 with adjustable thickness and a workpiece inner wall supporting block 7 fixed outside the first adjusting pad 6.

The hollow area arranged in the supporting cylinder 3 is vertically and slidably provided with an upper supporting plate 12 for supporting an inner mold 33, and a supporting and adjusting mechanism with adjustable thickness is arranged between the upper supporting plate 12 and the lower bottom plate 2.

A lower support plate 13 is arranged below the upper support plate 12, a fourth adjusting pad 14 with adjustable thickness is arranged between the lower support plate 13 and the upper support plate 12, and the lower support plate 13 is arranged on the lower bottom plate 2.

The inner side wall of the supporting cylinder 3 is vertically provided with a sliding groove 19, the upper supporting plate 12 is provided with a sliding block in a protruding mode at the corresponding position of the sliding groove 19, and the sliding block is embedded into the sliding groove 19.

The compression mold is arranged in mirror symmetry relative to a horizontal symmetry plane, and the upper part and the lower part of the symmetry plane comprise complete inner tubes.

A second adjusting pad 9 with adjustable thickness is arranged between the two symmetrical inner tubes.

Compression mould compressing mechanism: the pressing die comprises an upper top plate 1, a lower bottom plate 2 and inner tubes arranged between the upper top plate 1 and the lower bottom plate 2, wherein the inner tubes are arranged into a single group or an upper group and a lower group, and each group of inner tubes comprises an inner die 33 and an outer die 34; the pressing mechanism comprises a supporting top plate 30 and a supporting bottom plate 31, wherein the pressing die is arranged in the supporting top plate, the lower bottom plate 2 is detachably fixed above the supporting bottom plate 31, and the supporting top plate 30 is supported on the supporting bottom plate 31 through a supporting column 32 with adjustable height;

the supporting bottom plate 31 is rotatably connected to the lifting base 41 through a bearing 42, and a fixed frame 43 is erected on the lifting base 41;

a jack 36 positioned above the upper top plate 1 is hung below the support top plate 30, and a jack hydraulic oil pipe 37 of the jack 36 passes through the upper side of the support top plate 30 and is connected to the rotating end of a hydraulic rotary joint 35; the fixed end housing of the hydraulic swivel 35 is fixed to the fixed frame 43; the fixed end of the hydraulic swivel 35 is connected to the hydraulic station through an external oil passage, and the jack hydraulic oil pipe 37 is connected to the external oil passage.

The support column 32 is sleeved with a fifth adjusting pad 38 with adjustable thickness, and the support top plate 30 is supported and arranged above the fifth adjusting pad 38.

Each support column 32 includes an upper section and a lower section, the upper section being threadably connected to the lower section so that the length of the support column 32 can be adjusted.

The lifting base 41 is connected to the telescopic end of the vertical lifting hydraulic cylinder 39.

The fixed end of the lifting hydraulic cylinder 39 is fixed to a fixed base 40.

All the above adjusting pads (the first adjusting pad 6 to the fifth adjusting pad 38) can be used as a thickness-adjustable solution, and a plurality of stacked thin adjusting pads can be used to achieve the effect of adjusting the thickness by adjusting the number of the thin adjusting pads. Of course, other schemes are possible.

The quenching system comprises a pressing die, wherein the pressing die comprises an upper top plate 1, a lower bottom plate 2 and an inner tube arranged between the upper top plate 1 and the lower bottom plate 2, and the inner tube comprises an inner die 33 and an outer die 34; the inner mold 33 includes a cone composed of a plurality of laminated cone sheets 4, and the outer mold 34 includes a plurality of sliders 5; one end face of the sliding block 5 facing the cone is an inclined face attached to the cone; one end surface of the sliding block 5, which is away from the cone, is a working surface for supporting the inner wall of the limiting annular workpiece 8;

a separable pressing mechanism is arranged above the upper top plate 1;

a lower material returning hole is arranged at the lower bottom plate 2 in a penetrating way, and a lower material returning rod for pushing the inner die 33 or the outer die 34 to release the locking state of the outer die 34 and the workpiece 8 is arranged through the lower material returning hole; a limiting mechanism for preventing the blanking rod from falling is arranged at the blanking hole;

the lower bottom plate 2 is arranged on two first guide rails 54 in a sliding way, the first guide rails 54 are fixed on a lifting and rotating platform, and the lifting and rotating platform is arranged above the quenching bath; the lower stripper bar is located in the region between the two first rails 54;

two second guide rails 55 positioned on the same horizontal plane with the first guide rails 54 are arranged outside the lifting rotary platform, a lower material returning mechanism is arranged in a lower area between the two second guide rails 55, and comprises a lower jacking moving block for jacking a lower material returning rod from bottom to top and a lower power mechanism 63 for jacking the lower jacking moving block from bottom to top;

a feeding hydraulic cylinder 69 for pulling the pressing die to move horizontally is arranged outside the lifting and rotating platform.

The inner tube is arranged in mirror symmetry relative to a horizontal symmetry plane, and an upper tire mold and a lower tire mold which are separable are respectively arranged above and below the symmetry plane.

A second adjusting pad 9 with adjustable thickness is arranged between the upper tire mold and the lower tire mold.

An upper material returning hole is arranged at the upper top plate 1 in a penetrating way, and an upper material returning rod for propping up the inner die 33 or the outer die 34 in the upper tire membrane is arranged through the material returning hole so as to release the locking state of the outer die 34 and the workpiece 8; the upper material returning hole is provided with a limiting mechanism for preventing the upper material returning rod from falling.

An upper material returning mechanism is arranged in an upper region between the two second guide rails 55, and comprises an upper pushing block for pushing the upper material returning rod from top to bottom and an upper power mechanism 60 for pushing the upper pushing block from top to bottom.

The lower power mechanism 63 is a lower hydraulic jack, which is disposed below the lower jack block.

The upper power mechanism 60 is an upper hydraulic jack, which is arranged above the upper jack moving block.

The upper material returning mechanism is connected to a material returning lifting hydraulic cylinder 61.

The upper material returning mechanism is provided with symmetrical L-shaped supporting frame plates 70, and when the pressing die moves to the upper material returning mechanism, the upper top plate 1 is embedded and supported on the L-shaped supporting frame plates 70.

The upper material returning mechanism is arranged right above the lower material returning mechanism.

The upper material returning mechanism is arranged on the lower material returning mechanism through a working frame 62.

The fixed end of the feeding hydraulic cylinder 69 and the fixed end of the material returning and lifting hydraulic cylinder 61 are both fixed on the working frame 62, and the telescopic end of the material returning and lifting hydraulic cylinder 61 is vertically fixed on the upper material returning mechanism downwards.

The outside of the lower bottom plate 2 is connected with an L-shaped pull rod working block 57, a U-shaped concave opening is formed in the side wall of the pull rod working block 57, a feeding hydraulic cylinder telescopic rod 56 of a feeding hydraulic cylinder 69 penetrates through the U-shaped concave opening and then is connected with a pull rod limiting block 58, and the horizontal direction of the pull rod limiting block 58 is limited between the side wall of the pull rod working block 57 and the outer side wall of the lower bottom plate 2.

A placing area is reserved between the blanking mechanism and the lifting rotary platform when the pressing die changes the workpiece 8.

The lower material returning mechanism comprises a lower frame body fixed on the fixed platform, a lower power mechanism 63 is fixed in the lower frame body, a lower fixed block 65 with a cross groove is hung on the lower frame body, a lower top moving block is embedded in the cross groove, and the lower top moving block is a lower cross block 64.

The upper material returning mechanism comprises an upper frame 59, an upper power mechanism 60 is fixed in the upper frame 59, an upper fixing block with a cross groove is hung below the upper frame 59 and positioned below the upper power mechanism 60, and an upper top moving block is embedded in the cross groove and is an upper cross block 66.

The lower part of the upper cross 66 is provided with a return spring 68 in a surrounding manner, and a fixed limiting plate is arranged below the return spring 68.

The lifting and rotating platform described above is actually a platform where the supporting base plate 31 is located, and due to the arrangement of the motor 51, the gear box 52 and the toothed base plate 53, the motor 51 drives the toothed base plate 53 to rotate, and further drives the supporting base plate 31 to rotate, and the lifting hydraulic cylinder 39 drives the supporting base plate 31 to move up and down, so that the supporting base plate 31 can lift and rotate, and thus can be called as a lifting and rotating platform, which are disclosed in the prior art.

When the utility model is used, a single group of inner tubes can be used, and two groups of inner tubes which are vertically symmetrical can be also arranged, and under the condition of vertical symmetry, the inner tubes, the upper top plate 1, the lower bottom plate 2, the fixed sleeve, the material returning rod 15, the third adjusting pad 10 and the like are all arranged in mirror symmetry relative to a horizontal symmetrical plane.

Before use, the pressing die can be adjusted according to the size of the workpiece 8, one of the two adjusting modes is to directly adjust the radial extension length of the sliding block 5 by adjusting the thickness of the first adjusting pad 6, and the other is to adjust the fourth adjusting pad 14, so as to adjust the height of the upper supporting plate 12, further adjust the height of the inner die 33, and further enable the sliding block 5 to move, specifically as follows: since the height of the slide 5 is fixed (the bottom is the height of the support cylinder 3), there is a relative sliding between the inner mold 33 and the slide 5 when the inner mold 33 moves up and down; when the upper support plate 12 slides upwards, the conical piece 4 of the inner mold 33 moves upwards, so that the sliding block 5 is pushed to move outwards; when the upper support plate 12 slides down, the cone 4 of the inner mold 33 moves down, thereby giving a space for the slide 5 to move inward; by both adjustment means, the applicable diameter of the size of the workpiece 8 can be adjusted, and thus the method can be applied to processing of workpieces 8 in a larger size range.

When the outer diameter of the outer die 34 is regulated to be equal to the inner diameter of the workpiece 8, the workpiece 8 is sleeved into the outer die 34, then a jack 36 above the workpiece is started, and the jack 36 is used for pressing the upper top plate 1, so that the workpiece 8 cannot deform due to inward shrinkage; at this time, the die and the workpiece 8 are placed in a quenching bath by the lifting hydraulic cylinder 39 to be quenched, and the workpiece 8 tends to shrink and deform during quenching and cooling, and this tendency is restrained by the outer die 34 to thereby attain the effect of preventing deformation. In the quenching process, the supporting bottom plate 31 is driven by a power mechanism (a motor drives a gear to drive the supporting bottom plate 31 to rotate) to rotate in the lifting base 41, so that the pressing die, the workpiece 8 and the jack 36 are driven to rotate, and the quenching uniformity is improved. However, in this process, the lifting base 41 is not rotated, so that the fixed frame 43 is not rotated, and the fixed end housing of the hydraulic swivel 35 is not rotated, but the jack 36 is rotated following the pressing mold, so that the jack hydraulic oil pipe 37 is also rotated following the jack 36, at which time it is the time when the hydraulic swivel 35 is active. The hydraulic swivel 35 ensures that the housing and the external oil path are stationary in the case of rotation of the oil path connected to the rotary end of the hydraulic oil pipe 37 of the jack, thereby avoiding knotting of the external oil path and ensuring communication between the hydraulic oil pipe 37 of the jack and the external oil path (since the technology of the hydraulic swivel 35 is mature and well known, and not described in detail). Since the jack hydraulic oil pipe 37 and the jack 36 are rotated in synchronization, the jack hydraulic oil pipe 37 is not tied. The use of hydraulic jack 36 ensures sufficient jacking force compared to the use of telescopic rods as disclosed in the background art. After the completion of the quenching, the lifting base 41 is lifted by the lifting hydraulic cylinder 39, and the workpiece 8 is lifted. When the material is required to be returned, the material returning jack is utilized to push the material returning rod to push the fixed cylinder to move, the fixed cylinder is used to push the outer die 34 to move, and the outer die 34 and the workpiece 8 can slide relatively, so that the compression of the outer die and the workpiece 8 is relieved, and the workpiece 8 is taken out conveniently.

The specific material returning process is introduced as follows:

after the quenching of the workpiece 8 on the pressing die is completed, the pressing of the jack 36 is released, so that the pressing die can move on the first guide rail 54 as a whole (therefore, it can be also known that the pressing die and the first guide rail 54 do not need to be fixed by bolts during quenching, because the pressing mechanism above can press the pressing die on the first guide rail 54 during quenching, thereby achieving the fixing effect). The lifting and rotating platform is rotated until the first guide rail 54 and the second guide rail 55 are positioned on the same straight line, and the pressing die is pulled out from the first guide rail 54 until reaching the second guide rail 55 by using the feeding hydraulic cylinder 69 and then reaches the blanking mechanism. If the pressing mould is only provided with a lower half part, only a lower material returning mechanism is required, and if the pressing mould is provided with two inner tubes which are symmetrical up and down, an upper material returning mechanism is required.

Consider the case of only the lower tube. The pressing die can be moved to the position where the lower material returning rod is just above the lower material returning block by using positioning modes such as key positioning or laser positioning, and when returning materials, the lower material returning mechanism (which can be set as a hydraulic jack) is used for pushing the lower cross block 64, the lower cross block 64 can push the lower material returning rod to move upwards, so that the lower material returning rod can jack up the fixed cylinder, the fixed cylinder can jack up the sliding block 5 of the outer die 34, the sliding block 5 has a larger inward moving space, and the sliding block 5 can move inwards, so that the locking of the outer die 34 and the workpiece 8 is relieved. At this time, the upper top plate 1 is removed by the mechanical arm, the workpiece 8 is taken out and replaced, and then the upper top plate 1 is replaced.

If two inner tubes are symmetrical up and down, an upper material returning mechanism can be arranged, the pressing die can be moved to the position where the lower material returning rod is just above the lower material returning block by using key position positioning or laser positioning and the like, the upper material returning rod is just below the upper material returning block, the upper material returning rod 1 is just moved and embedded above the supporting frame plate 70, the upper material returning rod and the lower material returning rod can be pushed by using the same mode to play a role of material returning, then the upper material returning mechanism is moved upwards by the material returning lifting hydraulic cylinder 61, the upper material returning mechanism is driven to move upwards by the upper top plate 1 and the upper material returning mould located above (the upper top plate 1 is fixedly connected with the upper material returning membrane), the inner tube located above is separated from the workpiece 8, then the rest of the lower material returning mould, the lower bottom plate 2 and the workpiece 8 are moved to the position where the workpiece 8 is replaced, the upper material returning hydraulic cylinder 61 moves downwards, the upper material returning mechanism and the lower material returning cylinder are overlapped into a whole, then the workpiece 8 is horizontally replaced by using the material feeding hydraulic cylinder 69, and the workpiece 8 is horizontally transferred to the lifting platform for quenching, and the pressing die is completed.

From the above, even if only the tire mold is located below, the upper material returning mechanism can be arranged, and the upper material returning mechanism can play a role of lifting the upper top plate 1, so that the upper top plate 1 does not need to be accessed by a mechanical arm.

In other designs of the inner and outer dies 34, the lower material returning rod may be used to lift the inner die 33 (in this design, the inner die 33 located below is larger at the top and smaller at the bottom) to perform the material returning function, and no matter which is lifted, the effect is to make the inner and outer dies 34 move relatively so that the outer diameter of the outer die 34 can be smaller, and the effect of releasing the locking of the workpiece 8 is performed.

In order to prevent the withdrawal lever 15 (including the lower withdrawal lever and the upper withdrawal lever) from falling off, a limit mechanism for preventing the withdrawal lever 15 from falling off may be provided. For example, a structure with a large opening and a small opening is arranged at the position of the material returning hole (comprising an upper material returning hole and a lower material returning hole), so that the material returning rod 15 is also large and small, and the material returning rod 15 can be prevented from falling off by utilizing limit. When the lower material returning rod is arranged in the mode, the upper end and the lower end of the material returning rod are flush with the upper end and the lower end of the material returning hole in a natural static state (the upper part and the lower part are not pushed or limited); the bottom of the upper material returning rod slightly protrudes when the upper material returning rod is placed still, so that some unfilled space exists at the upper part of the material returning hole; thus, when the upper and lower ends of the upper material returning rod are flush with the upper and lower ends of the material returning hole, the unfilled space becomes a space (not shown) for pushing the upper material returning rod. In practice, other anti-drop arrangements are possible, such as adjusting their play space with other keys, a plurality of screws, etc.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should be covered by the protection scope of the present utility model by making equivalents and modifications to the technical solution and the inventive concept thereof.

Claims (10)

1. The size-adjustable pressing die is characterized by comprising an upper top plate (1), a lower bottom plate (2) and an inner tube arranged between the upper top plate (1) and the lower bottom plate (2), wherein the inner tube comprises an inner die (33) and an outer die (34); the inner die (33) comprises a cone formed by a plurality of laminated cone sheets (4), and the outer die (34) comprises a plurality of sliding blocks (5); the end surface of the sliding block (5) facing the cone is an inclined surface attached to the cone; one end surface of the sliding block (5) deviating from the cone is a working surface for supporting the inner wall of the limiting annular workpiece (8);

the supporting cylinder (3) is arranged on the lower bottom plate (2), an upper supporting plate (12) for supporting the inner die (33) is vertically arranged in a hollow area arranged in the supporting cylinder (3) in a sliding mode, and a supporting and adjusting mechanism with adjustable thickness is arranged between the upper supporting plate (12) and the lower bottom plate (2).

2. Size adjustable die according to claim 1, characterized in that the support cylinder (3) and the lower plate (2) are connected by a bolt leaving a vertical play; a material returning rod (15) which is embedded in the lower bottom plate (2) in a sliding way is arranged right below the thickness position of the supporting cylinder (3); and an anti-falling boss limiting structure is arranged between the material returning rod (15) and the embedded opening of the lower bottom plate (2).

3. A size adjustable die according to claim 1, characterized in that the upper surface of the lower plate (2) is provided with a thickness adjustable workpiece bottom support structure for supporting a workpiece (8).

4. A size adjustable die according to claim 3, characterized in that the work piece bottom support structure comprises a third adjusting pad (10) of adjustable thickness and a work piece bottom support block (11) arranged above the third adjusting pad (10).

5. A size adjustable die according to claim 1, characterized in that an end face of the slider (5) facing away from the cone is provided with a workpiece inner wall support structure for supporting an inner wall contacting the workpiece (8).

6. The size adjustable die according to claim 5, wherein the workpiece inner wall support structure comprises a first adjusting pad (6) of adjustable thickness and a workpiece inner wall support block (7) fixed outside the first adjusting pad (6).

7. Size adjustable die according to claim 1, characterized in that a lower support plate (13) is arranged below the upper support plate (12), a fourth adjusting pad (14) with adjustable thickness is arranged between the lower support plate (13) and the upper support plate (12), and the lower support plate (13) is arranged on the lower bottom plate (2).

8. The size-adjustable die according to claim 1, wherein a chute (19) is vertically provided on the inner side wall of the support cylinder (3), and a slider is provided on the upper support plate (12) in a protruding manner at a position corresponding to the chute (19), and is embedded in the chute (19).

9. A size adjustable die according to any one of claims 1-8, wherein said die is arranged mirror-symmetrically with respect to a horizontal plane of symmetry, both above and below said plane of symmetry comprising the complete inner tube.

10. A size adjustable die according to claim 9, characterized in that a second adjusting pad (9) of adjustable thickness is arranged between two symmetrical inner tubes.