CN111589933A - Positioning and material returning device for water expansion forming die - Google Patents

Positioning and material returning device for water expansion forming die Download PDF

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Publication number
CN111589933A
CN111589933A CN202010582965.1A CN202010582965A CN111589933A CN 111589933 A CN111589933 A CN 111589933A CN 202010582965 A CN202010582965 A CN 202010582965A CN 111589933 A CN111589933 A CN 111589933A
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CN
China
Prior art keywords
guide rod
water
water expansion
positioning
expansion
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Pending
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CN202010582965.1A
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Chinese (zh)
Inventor
李勇
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ANHUI FUGUANG INDUSTRIAL CO LTD
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ANHUI FUGUANG INDUSTRIAL CO LTD
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Priority to CN202010582965.1A priority Critical patent/CN111589933A/en
Publication of CN111589933A publication Critical patent/CN111589933A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/047—Mould construction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/039—Means for controlling the clamping or opening of the moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/18—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)

Abstract

The invention discloses a positioning and material returning device of a water expansion forming die, which comprises an upper die and a lower die, wherein the upper die and the lower die are respectively arranged on an upper die seat and a lower die seat, an upper guide rod is arranged in an upper slide way of the upper die seat in a sliding manner, a top insert is fixed at the top of the upper slide way, a slide rod is arranged at the bottom of the top insert, the top of the upper guide rod is sleeved on the slide rod in a sliding manner, and the upper guide rod is abutted against a limiting boss at the bottom of the slide; a lower guide rod is arranged in the lower slide way of the lower die holder in a sliding manner, a bottom insert is fixed at the bottom of the lower slide way, and the bottom of the lower guide rod is elastically supported above the bottom insert through a lower spring; the outer wall of the lower guide rod is also provided with a section of positioning conical surface, the mounting groove of the lower die holder is internally provided with a limiting movable part, and the limiting movable part is pushed by the positioning driving mechanism to move along the radial direction, so that the positioning conical surface of the lower guide rod is abutted or disengaged. The invention has the advantages that: the workpiece after expansion is guaranteed to be uniformly arranged on the lower die, so that the manipulator can accurately grab and discharge materials at a fixed position.

Description

Positioning and material returning device for water expansion forming die
Technical Field
The invention relates to a forming die, in particular to a positioning material returning device of a water expansion forming die.
Background
The water expansion forming die for manufacturing the container by using the existing steel pipe has the advantages that the upper end and the lower end of a workpiece are respectively clamped on the upper die base and the lower die base during expansion, and the workpiece is easily driven by the upper die to move upwards in the process of moving upwards during die opening after the expansion is finished, so that a manipulator cannot correctly grab and discharge.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a positioning and material returning device of a water expansion forming die, so that expanded workpieces are uniformly placed on a lower die, and a manipulator can conveniently and accurately grab and discharge materials at a fixed position.
The invention is realized by the following technical scheme:
a positioning and material returning device of a water expansion forming die comprises an upper die and a lower die, wherein the top of the upper die is arranged on an upper die base, the bottom of the lower die is arranged on a lower die base,
the center of the upper die base is provided with a vertically extending upper slideway, an upper guide rod is arranged in the upper slideway in a sliding manner, the top end of the upper guide rod is suspended on a vertical sliding rod and can slide up and down along the sliding rod, and the upper guide rod is propped against the upper guide rod downwards through an upper elastic assembly to be positioned at a lower limit position in a natural state; the bottom of the upper guide rod is connected with an upper guide pillar, and the upper guide pillar vertically extends downwards into an upper cavity in the center of the upper die;
a lower slideway extending vertically is formed in the center of the lower die base, a lower guide rod is arranged in the lower slideway in a sliding mode, the bottom of the lower guide rod is elastically supported on a lower elastic assembly, a lower guide pillar is connected to the top of the lower guide rod, and the lower guide pillar vertically extends upwards into a lower cavity in the center of the lower die;
the outer wall of the lower guide rod is also provided with a section of positioning part, one side of the lower die holder is provided with an installation groove which is communicated with the inside and the outside, a limiting movable part is arranged in the installation groove, the inner end surface of the limiting movable part is matched with the positioning part of the lower guide rod, the limiting movable part is pushed to move along the radial direction through the positioning driving mechanism, the positioning part of the lower guide rod is tightly supported or separated, and when the limiting movable part is tightly supported with the positioning part of the lower guide rod, the vertical movement of the lower guide rod is limited.
Furthermore, the upper elastic assembly comprises an upper spring, a top insert is fixed at the top of the upper slideway, the sliding rod is connected to the bottom of the top insert, the top of the upper guide rod is slidably sleeved on the sliding rod, and the upper guide rod is abutted against a limiting boss at the bottom of the sliding rod through the upper spring;
the lower elastic component comprises a lower spring, a bottom insert is fixed at the bottom of the lower slideway, and the bottom of the lower guide rod is elastically supported above the bottom insert through the lower spring.
Furthermore, the limiting movable part is divided into an inner section and an outer section, the cross section area of the inner section of the limiting movable part is larger than that of the outer section, a limiting step is formed at the junction of the inner section and the outer section of the limiting movable part, and a limiting step surface matched with the limiting step of the limiting movable part is arranged on the mounting groove of the lower die holder.
Furthermore, the positioning conical surface of the lower guide rod is a concave conical surface.
Furthermore, an upper water expansion conical surface is arranged on the outer wall of the upper guide rod, an upper water expansion block and an upper expansion outer sleeve are sequentially sleeved on the outer periphery of the upper guide rod corresponding to the upper water expansion conical surface from inside to outside, the inner wall of the upper water expansion block during expansion is matched with the upper water expansion conical surface, and an upper clamping gap for clamping the upper end of a workpiece is formed between the upper expansion outer sleeve and the upper water expansion block; the outer wall of the lower guide rod is provided with a section of lower water expansion conical surface, the lower guide rod is sequentially sleeved with a lower water expansion block and a lower expansion outer sleeve from inside to outside on the periphery corresponding to the lower water expansion conical surface, the inner wall of the lower water expansion block during expansion is matched with the lower water expansion conical surface, and a lower clamping gap for clamping the lower end of a workpiece is formed between the lower expansion outer sleeve and the lower water expansion block.
Further, an upper clamping ring protruding inwards is arranged on the inner wall of the upper tensioning outer sleeve, and the upper tensioning outer sleeve is clamped into an upper clamping groove in the outer wall of the upper water tensioning block through the upper clamping ring; the inner wall of the lower tensioning outer sleeve is provided with a lower clamping ring protruding inwards, and the lower tensioning outer sleeve is clamped into a lower clamping groove in the outer wall of the lower water tensioning expansion block through the lower clamping ring.
Furthermore, the top of the upper guide rod is tightly propped against the bottom of the upper spring through an upper water sealing block, and the bottom of the lower guide rod is tightly propped against the top of the lower spring through a lower water sealing block.
Furthermore, an upper fixed sleeve is sleeved on the periphery of the upper section of the upper guide rod, and the moving lower limit position of the upper water sealing block is limited through the top of the upper fixed sleeve; the periphery of the lower section of the lower guide rod is sleeved with a lower fixing sleeve, and the upper limit position of the lower water sealing block in moving is limited through the bottom of the lower fixing sleeve.
Furthermore, a first water sealing block is arranged at the top of the water-feeding expansion block, the first water sealing block is movably sleeved outside the upper guide rod, a second water sealing block is arranged at the bottom of the water-discharging expansion block, and the second water sealing block is movably sleeved outside the lower guide rod.
Furthermore, the positioning driving mechanism is an air cylinder, and a piston rod of the air cylinder pushes the limiting movable part to move along the radial direction.
Compared with the prior art, the invention has the following advantages:
the invention provides a positioning and material returning device of a water expansion forming die, which is characterized in that a section of positioning conical surface is arranged on the outer wall of a lower guide rod, a limiting movable part is arranged in a lower die holder, the inner end surface of the limiting movable part is matched with the positioning conical surface of the lower guide rod, and the limiting movable part is pushed by a positioning driving mechanism to move along the radial direction, so that the inner end surface of the limiting movable part is abutted to or separated from the positioning conical surface, and the lower guide rod is locked or loosened. In the whole die assembling and die sinking process, the lower guide rod is locked by the limiting movable part, so that the lower guide rod cannot move upwards, the lower water expansion block is always in an expansion state, the lower clamping gap between the lower expansion outer sleeve and the lower water expansion block always clamps the lower end of a workpiece, the workpiece is prevented from moving upwards along with an upper die in the die sinking process, the workpiece is guaranteed to be arranged on the lower die in the die sinking process, and the manipulator can accurately grab and discharge materials at a fixed position.
Drawings
Fig. 1 is a perspective view of the present invention.
Fig. 2 is a perspective cross-sectional view of the present invention.
FIG. 3 is a front sectional view of the upper die base and upper die portion of the present invention.
FIG. 4 is a perspective cross-sectional view of the upper die base and upper die portion of the present invention.
FIG. 5 is a front sectional view of the lower die base and lower die portion of the present invention.
FIG. 6 is a perspective cross-sectional view of the lower die base and lower die portion of the present invention.
Figure 7 is a perspective view of the cylinder and lower die base of the present invention.
Fig. 8 is a cross-sectional view of fig. 7.
Fig. 9 is an exploded view of the spacing movable part, the lower guide rod and the lower fixing sleeve of the present invention.
Fig. 10 is a perspective view of a single expansion flap.
Reference numbers in the figures: 1, 2, 3, 4, 5, 6, top insert, 7 slide bar, 8, 9, upper water sealing block, 10, 11, 12, 13, 14, upper snap ring, 15, first, 16, 17, bottom insert, 18, lower spring, 19, 20, lower fixing sleeve, 21, 22, 23, 24, 25, second, 26, 27, 33, upper pressure plate, 34, 35, lower pressure plate, 36.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
Referring to fig. 1 to 10, the embodiment discloses a positioning and material returning device for a water expansion forming die, which includes an upper die 1 and a lower die 2, wherein the top of the upper die 1 is fixedly mounted on an upper die base 3 through an upper pressing plate 34, and the bottom of the lower die 2 is fixedly mounted on a lower die base 4 through a lower pressing plate 35.
The center of the upper die base 3 is provided with an upper slide way extending vertically, an upper guide rod 5 is arranged in the upper slide way in a sliding mode, a top insert 6 is fixed at the top of the upper slide way, a slide rod 7 extending vertically downwards is arranged at the bottom of the top insert 6, the top of the upper guide rod 5 is slidably sleeved on the slide rod 7, the upper guide rod 5 is abutted against a limiting boss at the bottom of the slide rod 7 through an upper spring 8, the top of the upper guide rod 5 is abutted against the bottom of the upper spring 8 through an upper water sealing block 9, the periphery of the upper section of the upper guide rod 5 is sleeved with an upper fixing sleeve 10, and the lower limit position of the upper water sealing block 9 in a.
The bottom of the upper guide rod 5 is connected with an upper guide post 11, and the upper guide post 11 vertically extends downwards to an upper cavity in the center of the upper die 1. The outer wall of the upper guide rod 5 is provided with an upper water expansion conical surface, the outer periphery of the upper guide rod 5 corresponding to the upper water expansion conical surface is sleeved with an upper water expansion block 12 and an upper expansion outer sleeve 13 in sequence from inside to outside, the inner wall of the upper water expansion block 12 during expansion is matched with the upper water expansion conical surface, an upper clamping gap for clamping the upper end of a workpiece is formed between the upper expansion outer sleeve 13 and the upper water expansion block 12, and the vertical motion of the upper guide rod 5 can be converted into the horizontal motion of the upper water expansion block 12 due to the matching of the inner wall of the upper water expansion block 12 and the upper water expansion conical surface, so that the upper water expansion block 12 expands outwards along the radial direction. The inner wall of the rising tight jacket 13 is provided with an upper clamping ring 14 protruding inwards, the rising tight jacket 13 is clamped into an upper clamping groove on the outer wall of the rising tight block 12 through the upper clamping ring 14, and the rising tight jacket 12 can only expand or contract radially through the matching of the upper clamping ring 14 and the upper clamping groove, and cannot move axially. The top of the water-feeding expansion block 12 is provided with a first water sealing block 15, and the first water sealing block 15 is movably sleeved outside the upper guide rod 5.
The center of the lower die holder 4 is provided with a vertically extending lower slideway, a lower guide rod 16 is arranged in the lower slideway in a sliding manner, a bottom insert 17 is fixed at the bottom of the lower slideway, the bottom of the lower guide rod 16 is elastically supported above the bottom insert 17 through a lower spring 18, and the bottom of the lower guide rod 16 is abutted against the top of the lower spring 18 through a lower water sealing block 19. The lower part of the lower guide rod 16 is sleeved with a lower fixing sleeve 20, and the upper limit position of the lower water sealing block 19 is limited through the bottom of the lower fixing sleeve 20.
The top of the lower guide rod 16 is connected with a lower guide post 21, and the lower guide post 21 vertically extends upwards into a lower cavity in the center of the lower die 2. The outer wall of the lower guide rod 16 is provided with a section of lower water expansion conical surface 36, the lower guide rod 16 is sleeved with a lower water expansion block 22 and a lower expansion outer sleeve 23 from inside to outside in sequence at the periphery corresponding to the lower water expansion conical surface 36, the inner wall of the lower water expansion block 22 during expansion is matched with the lower water expansion conical surface 36, and a lower clamping gap for clamping the lower end of a workpiece is formed between the lower expansion outer sleeve 23 and the lower water expansion block 22. The inner wall of the lower tensioning outer sleeve 23 is provided with a lower clamping ring 24 protruding inwards, the lower tensioning outer sleeve 23 is clamped into a lower clamping groove in the outer wall of the lower tensioning block 22 through the lower clamping ring 24, and the lower tensioning block 22 can only expand or contract radially and cannot move axially through the matching of the lower clamping ring 24 and the lower clamping groove. The bottom of the lower water expansion block 22 is provided with a second water sealing block 25, and the second water sealing block 25 is movably sleeved outside the lower guide rod 16.
The upper water expansion block 12 and the lower water expansion block 22 are surrounded by a plurality of expansion flaps 26 which are uniformly distributed along the circumferential direction, and the plurality of expansion flaps 26 are sleeved together by an expansion flap tightly wrapping beef tendon 27.
The outer wall of the lower guide rod 16 is also provided with a section of positioning part 28. One side of the lower die holder 4 is provided with an installation groove 29 which is through inside and outside, a limiting movable part 30 is arranged in the installation groove 29, the inner end surface of the limiting movable part 30 penetrates through the lower fixed sleeve 20 and then is matched with the positioning part 28 of the lower guide rod 16, the limiting movable part 30 is pushed by the positioning driving mechanism to move along the radial direction, the positioning part 28 of the lower guide rod 16 is pressed tightly or separated tightly, and when the limiting movable part 30 is pressed tightly with the positioning part 28 of the lower guide rod 16, the vertical movement of the lower guide rod 16 is limited. In this embodiment, the positioning driving mechanism uses the air cylinder 31, and the piston rod of the air cylinder 31 pushes the movable limiting component 30 to move in the radial direction.
In this embodiment, the positioning portion 28 may adopt one of a conical surface structure, an inclined surface structure and a positioning groove structure, the positioning portion 28 adopts an inward concave conical surface structure, the limiting movable component 30 is divided into an inner section and an outer section, the cross sectional area of the inner section of the limiting movable component 30 is larger than that of the outer section, a limiting step 32 is formed at the junction of the inner section and the outer section of the limiting movable component 30, and a limiting step surface 33 matched with the limiting step 32 of the limiting movable component 30 is arranged on the mounting groove 29 of the lower die holder 4.
When the water expansion forming die is used, the water expansion forming die is installed on a water expansion machine, the upper die base 3 is installed at the bottom of an upper platen of the water expansion machine, and the lower die base 4 is installed on a lower platen of the water expansion machine. The blank before water expansion forming is called a tube blank, and the tube blank after water expansion forming is called a workpiece.
The working process of the embodiment is as follows:
A. feeding:
and (3) putting the tube blank downwards along an annular space between the lower guide rod 16 and the lower die 2, so that the lower end of the tube blank is inserted into a gap between the lower tensioning outer sleeve 23 and the lower tensioning block 22, and the lower guide rod 16 is used for guiding to finish feeding.
B. Die assembly:
then the upper platen of the water expansion machine moves downwards to drive the upper die holder 3 and the upper die 1 to move downwards together, so that the upper die 1 and the lower die 2 are matched, in the process, the upper guide pillar 11 is firstly contacted with the lower guide pillar 21, the upper guide pillar 11 and the lower guide pillar 21 are stressed along with the continuous downward movement of the upper platen, the upper guide pillar 11 and the upper guide rod 5 synchronously move upwards for a certain distance, meanwhile, the lower guide pillar 21 and the lower guide rod 16 synchronously move downwards for a certain distance, and at the moment, the upper spring 8 and the lower spring 18 are respectively compressed. The upper water expansion conical surface of the upper guide rod 5 moves upwards to expand the upper water expansion block 12 outwards along the radial direction, so that the upper end of the pipe blank is clamped in an upper clamping gap between the upper expansion outer sleeve 13 and the upper water expansion block 12; the lower end of the tube blank is clamped in a lower clamping gap between the lower tensioning outer sleeve 23 and the lower tensioning block 22 by the same principle. At the moment, the upper cavity of the upper die 1 and the lower cavity of the lower die 2 are closed, and die assembly is completed.
C. The lower guide rod 16 is locked:
the piston rod of the control cylinder 31 extends out to push the limiting movable part 30 to move inwards along the radial direction, so that the inner end surface of the limiting movable part 30 is attached to the positioning conical surface 28 of the lower guide rod 16, the lower guide rod 16 is locked by the conical surface, and the lower guide rod 16 cannot move upwards.
D. Water expansion molding:
the water expansion machine high-pressure water supply system works, and high-pressure water sequentially enters a cavity of a lower guide post 21 from central holes of a bottom insert 17, a lower water sealing block 19 and a lower guide rod 16 and enters a pipe blank through an opening on the side surface of the lower guide post 21. The upper end and the lower end of the tube blank are clamped and sealed by high-pressure water, so that the tube blank is forced to deform in a water expansion cavity formed by an upper cavity and a lower cavity, and water expansion molding is finished after the water expansion process expansion requirement is met.
E. Opening mould
After the high-pressure water supply system of the water swelling machine finishes working, after high-pressure water is decompressed, the upper platen of the water swelling machine moves upwards to drive the upper die base 3 and the upper die 1 to move upwards synchronously, the upper die base 2 is separated, the upper guide rod 5 moves downwards under the action of the upper spring 8 to reset at the moment, the upper water swelling block 12 is tightened inwards under the action of the swelling petal wrapping bracket 27, and then the upper water swelling block 12 is separated from the upper end of the clamped workpiece; in the lower die 2 part, due to the locking of the limiting movable part 30, the lower guide rod 16 cannot move upwards, the lower water expansion block 22 is still in an expanded state at the moment, and the lower end of the workpiece is still clamped between the lower expansion outer sleeve 23 and the lower water expansion block 22, so that the workpiece cannot be driven by the upper die 1 to move upwards together, and the workpiece is ensured to be always in the lower die 2 in the die opening process.
E. Discharging
After the mold opening is completed, the piston rod of the control cylinder 31 retracts, the locking of the lower guide rod 16 is released, at the moment, the lower guide rod 16 moves upwards to reset under the action of the lower spring 18, the lower water expansion block 22 is tightened inwards under the action of the expansion valve wrapping bracket 27, and the lower water expansion block 22 is separated from the lower end of the clamped workpiece. Then the manipulator grabs the workpiece on the lower die 2 for blanking.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a water rises forming die location material returned device, includes mould (1) and lower mould (2), it installs on upper die base (3) to go up mould (1) top, install on die holder (4) lower mould (2) bottom, its characterized in that:
an upper slide way extending vertically is formed in the center of the upper die holder (3), an upper guide rod (5) is arranged in the upper slide way in a sliding mode, the top end of the upper guide rod (5) is suspended on a vertical slide rod (7) in a hanging mode and can slide up and down along the slide rod (7), and in a natural state, the upper guide rod (5) is propped against the upper guide rod (5) downwards through an upper elastic assembly to enable the upper guide rod (5) to be located at a lower limit position; the bottom of the upper guide rod (5) is connected with an upper guide post (11), and the upper guide post (11) vertically extends downwards into an upper cavity in the center of the upper die (1);
a vertically extending lower slideway is formed in the center of the lower die base (4), a lower guide rod (16) is arranged in the lower slideway in a sliding mode, the bottom of the lower guide rod (16) is elastically supported on a lower elastic assembly, a lower guide pillar (21) is connected to the top of the lower guide rod (16), and the lower guide pillar (21) vertically extends upwards into a lower cavity in the center of the lower die (2);
the outer wall of the lower guide rod (16) is further provided with a section of positioning part (28), one side of the lower die holder (4) is provided with an installation groove (29) which is through inside and outside, a limiting movable part (30) is arranged in the installation groove (29), the inner end face of the limiting movable part (30) is matched with the positioning part (28) of the lower guide rod (16), the limiting movable part (30) is pushed to move along the radial direction through a positioning driving mechanism, the positioning part (28) of the lower guide rod (16) is abutted or separated, and when the limiting movable part (30) is abutted with the positioning part (28) of the lower guide rod (16), the vertical movement of the lower guide rod (16) is limited.
2. The water expansion forming die positioning and material returning device of claim 1, wherein: the upper elastic assembly comprises an upper spring (8), a top insert (6) is fixed at the top of the upper slideway, a sliding rod (7) is connected to the bottom of the top insert (6), the top of the upper guide rod (5) is slidably sleeved on the sliding rod (7), and the upper guide rod (5) is tightly abutted on a limiting boss at the bottom of the sliding rod (7) through the upper spring (8);
the lower elastic assembly comprises a lower spring (18), a bottom insert (17) is fixed at the bottom of the lower slideway, and the bottom of the lower guide rod (16) is elastically supported above the bottom insert (17) through the lower spring (18).
3. The water expansion forming die positioning and material returning device of claim 1, wherein: the limiting movable part (30) is divided into an inner section and an outer section, the cross section area of the inner section of the limiting movable part (30) is larger than that of the outer section, a limiting step (32) is formed at the junction of the inner section and the outer section of the limiting movable part (30), and a limiting step surface (33) matched with the limiting step (32) of the limiting movable part (30) is arranged on the mounting groove (29) of the lower die holder (4).
4. The water expansion forming die positioning and material returning device of claim 1, wherein: the positioning conical surface (28) of the lower guide rod (16) is a concave conical surface.
5. The water expansion forming die positioning and material returning device of claim 1, wherein: the outer wall of the upper guide rod (5) is provided with a section of upper water expansion conical surface, the outer periphery of the upper guide rod (5) corresponding to the upper water expansion conical surface is sleeved with an upper water expansion block (12) and an upper expansion outer sleeve (13) in sequence from inside to outside, the inner wall of the upper water expansion block (12) during expansion is matched with the upper water expansion conical surface, and an upper clamping gap for clamping the upper end of a workpiece is formed between the upper expansion outer sleeve (13) and the upper water expansion block (12); the outer wall of the lower guide rod (16) is provided with a section of lower water expansion conical surface (36), the lower guide rod (16) is sequentially sleeved with a lower water expansion block (22) and a lower expansion outer sleeve (23) from inside to outside on the periphery corresponding to the lower water expansion conical surface (36), the inner wall of the lower water expansion block (22) during expansion is matched with the lower water expansion conical surface (36), and a lower clamping gap for clamping the lower end of a workpiece is formed between the lower expansion outer sleeve (23) and the lower water expansion block (22).
6. The water expansion forming die positioning and material returning device of claim 5, wherein: an upper clamping ring (14) protruding inwards is arranged on the inner wall of the upper tensioning outer sleeve (13), and the upper tensioning outer sleeve (13) is clamped into an upper clamping groove in the outer wall of the upper water tensioning block (12) through the upper clamping ring (14); the inner wall of the lower tensioning outer sleeve (23) is provided with a lower clamping ring (24) protruding inwards, and the lower tensioning outer sleeve (23) is clamped into a lower clamping groove in the outer wall of the lower tensioning block (22) through the lower clamping ring (24).
7. The water expansion forming die positioning and material returning device of claim 1, wherein: the top of the upper guide rod (5) is tightly propped against the bottom of the upper spring (8) through an upper water sealing block (9), and the bottom of the lower guide rod (16) is tightly propped against the top of the lower spring (18) through a lower water sealing block (19).
8. The water expansion forming die positioning and material returning device of claim 7, wherein: an upper fixing sleeve (10) is sleeved on the periphery of the upper section of the upper guide rod (5), and the lower limit position of the upper water sealing block (9) in movement is limited through the top of the upper fixing sleeve (10); the periphery of the lower section of the lower guide rod (16) is sleeved with a lower fixing sleeve (20), and the upper limit position of the lower water sealing block (19) in moving is limited through the bottom of the lower fixing sleeve (20).
9. The water expansion forming die positioning and material returning device of claim 7, wherein: the water-feeding expansion block (12) is provided with a first water sealing block (15) at the top, the first water sealing block (15) is movably sleeved outside the upper guide rod (5), the lower water expansion block (22) is provided with a second water sealing block (25) at the bottom, and the second water sealing block (25) is movably sleeved outside the lower guide rod (16).
10. The water expansion forming die positioning and material returning device of claim 1, wherein: the positioning driving mechanism is an air cylinder (31), and a piston rod of the air cylinder (31) pushes the limiting movable part (30) to move along the radial direction.
CN202010582965.1A 2020-06-23 2020-06-23 Positioning and material returning device for water expansion forming die Pending CN111589933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010582965.1A CN111589933A (en) 2020-06-23 2020-06-23 Positioning and material returning device for water expansion forming die

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010582965.1A CN111589933A (en) 2020-06-23 2020-06-23 Positioning and material returning device for water expansion forming die

Publications (1)

Publication Number Publication Date
CN111589933A true CN111589933A (en) 2020-08-28

Family

ID=72182912

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010582965.1A Pending CN111589933A (en) 2020-06-23 2020-06-23 Positioning and material returning device for water expansion forming die

Country Status (1)

Country Link
CN (1) CN111589933A (en)

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