CN107866459B - Internal high-pressure forming machine for processing clamping and pressing type pipe fitting - Google Patents
Internal high-pressure forming machine for processing clamping and pressing type pipe fitting Download PDFInfo
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- CN107866459B CN107866459B CN201711227107.XA CN201711227107A CN107866459B CN 107866459 B CN107866459 B CN 107866459B CN 201711227107 A CN201711227107 A CN 201711227107A CN 107866459 B CN107866459 B CN 107866459B
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- 238000003825 pressing Methods 0.000 title claims abstract description 48
- 230000006835 compression Effects 0.000 claims abstract description 10
- 238000007906 compression Methods 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims description 9
- 238000003754 machining Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Forging (AREA)
Abstract
The invention provides an internal high-pressure forming machine for processing clamping and pressing pipe fittings, which comprises a machine base, a workbench, a cross beam and compression cylinders, wherein the workbench is arranged on the machine base, the cross beam is erected above the workbench through a vertically arranged upright post, the compression cylinders comprise mold locking cylinders and side cylinders, the mold locking cylinders are vertically arranged in the cross beam, piston rods of the mold locking cylinders are opposite to the workbench, at least two side cylinders are arranged on the side cylinders, the two side cylinders are respectively arranged on the workbench or the machine base through supporting seats and take a plane where the axial lead of the mold locking cylinders is arranged as a symmetrical center plane, the side cylinders are connected with the supporting seats through rotating shafts, and the two side cylinders can rotate in the same plane perpendicular to a horizontal plane. Compared with the prior art, the internal high-pressure forming machine not only improves the production quantity of the internal clamping and pressing type pipe fittings of each working cycle, but also enhances the universality of the internal clamping and pressing type pipe fittings of each type by changing the traditional arrangement mode of the side cylinders on the premise of not increasing the volume of equipment.
Description
Technical Field
The invention relates to the technical field of internal high-pressure hydraulic forming machines, in particular to an internal high-pressure forming machine for processing clamping and pressing type pipe fittings.
Background
The clamping and pressing pipe fitting is a connecting part capable of connecting stainless steel pipes without fastening pieces, and is generally manufactured by internal high-pressure forming equipment according to a hydraulic water expansion principle.
Most of the existing clamping and pressing type pipe fittings are of three types of 90 degrees, 45 degrees and straight-through type, so that the side cylinder arrangement mode of the traditional internal high-pressure forming equipment is as follows: the three sides of the inner high-pressure forming equipment are provided with side cylinders, the rest side is the operation position of a worker, the axial line of each side cylinder is parallel to the table top of the workbench, and the corresponding forming cavity in the die is also arranged in a mode of being parallel to the table top of the workbench. The structure causes that only one clamping and pressing pipe fitting can be processed in each working cycle of two side cylinders on two adjacent sides, the production efficiency is very low, if the processing quantity of the clamping and pressing pipe fitting is to be improved, only the forming cavity can be increased along the diagonal direction of a die, and the side cylinders are increased along the side edges of internal high-pressure forming equipment; moreover, even if the length of the side cylinder piston rod can be lengthened, the internal high-pressure forming equipment and the die thereof have larger and larger volumes, occupy more and more space, and do not accord with the design trend of modern equipment. Secondly, the universality of the traditional internal high-pressure forming equipment is not strong, the equipment for producing the 90-degree clamping and pressing pipe fitting can be used with the equipment for producing the straight-through clamping and pressing pipe fitting, but the equipment for producing the 45-degree clamping and pressing pipe fitting cannot be used, the limitation is very large, and the utilization rate is not high.
Disclosure of Invention
In order to solve the technical problems, the invention provides an internal high-pressure forming machine for processing clamping and pressing pipe fittings, which not only improves the production quantity of the clamping and pressing pipe fittings in each working cycle, but also enhances the universality of the clamping and pressing pipe fittings in various types by changing the traditional arrangement mode of side cylinders on the premise of not increasing the volume of equipment.
Based on the above, the invention provides an internal high-pressure forming machine for processing clamping and pressing pipe fittings, which comprises a machine base, a workbench, a cross beam and a compression cylinder, wherein the workbench is arranged on the machine base, the cross beam is erected above the workbench through a vertical upright post, the compression cylinder comprises a mold locking cylinder and side cylinders, the mold locking cylinder is vertically arranged in the cross beam, a piston rod of the mold locking cylinder is opposite to the workbench, at least two side cylinders are arranged, the two side cylinders are respectively arranged on the workbench or the machine base through a supporting seat and take a plane where the axial lead of the mold locking cylinder is arranged as a symmetrical center plane, the side cylinders are connected with the supporting seat through a rotating shaft, and the two side cylinders can rotate in the same plane vertical to a horizontal plane.
As the preferred scheme, the supporting seat includes two backup pads that set up relatively, two leave the installation interval between the backup pad, be equipped with the through-hole in the backup pad, the pivot is located the both sides of side jar, the side jar is located in the installation interval just the pivot passes the through-hole realizes the side jar with rotate between the supporting seat and be connected.
As the preferable scheme, the mesa of workstation is rectangle, two the supporting seat of side jar install in the both ends of workstation, the stand is arranged on the mesa of workstation and be located two between the side jar, the mode locking jar install in the middle part of crossbeam.
As a preferable scheme, a sliding block connected with a piston rod of the mode locking cylinder is arranged between the cross beam and the workbench, and the sliding block is sleeved on the upright post and can slide up and down along the upright post.
As the preferable scheme, the inner high-pressure forming machine further comprises a novel die, the novel die comprises an upper die and a lower die, the upper die is installed at the bottom of the sliding block, the lower die is installed on the table top of the workbench, and the upper die is opened and closed with the lower die through the up-and-down movement of the sliding block.
As a preferable scheme, the bottom end surface of the upper die is provided with a V-shaped groove, the side wall of the V-shaped groove is provided with a first concave position, the extending direction of the first concave position is perpendicular to the extending direction of the V-shaped groove, the top end of the lower die is provided with a protruding part corresponding to the V-shaped groove, the protruding part is isosceles triangle, the surface of the protruding part is provided with a second concave position corresponding to the first concave position, and when the upper die and the lower die are closed, the first concave position and the second concave position enclose a forming cavity for accommodating the clamping and pressing pipe fitting.
Preferably, the lower die comprises a base and a combining part, the combining part is arranged at the top end of the base, and the protruding part is arranged at the top end of the combining part.
Preferably, the combining part is an isosceles triangle similar to the protruding part, the protruding part is arranged at the vertex angle of the combining part, and two side walls of the protruding part protrude out of two side walls of the combining part respectively.
As a preferable scheme, the head end of the piston rod of the side cylinder is provided with a sealing head, and the sealing heads of the two side cylinders respectively extend into the forming cavity from the two sides of the V-shaped groove.
Preferably, the opening angle of the V-shaped groove is 45 ° or 90 °.
The embodiment of the invention has the following beneficial effects:
the invention provides an internal high-pressure forming machine for processing clamping and pressing pipe fittings, which comprises a machine base, a workbench, a cross beam and compression cylinders, wherein the workbench is arranged on the machine base, the cross beam is erected above the workbench through a vertically arranged upright post, the compression cylinders comprise mold locking cylinders and side cylinders, the mold locking cylinders are vertically arranged in the cross beam, piston rods of the mold locking cylinders are opposite to the workbench, at least two side cylinders are arranged on the side cylinders, the two side cylinders are respectively arranged on the workbench or the machine base through supporting seats by taking a plane where the axial lead of the mold locking cylinders is arranged as a symmetrical center plane, the side cylinders are connected with the supporting seats through rotating shafts, and the two side cylinders can rotate in the same plane perpendicular to a horizontal plane. Based on the structure, the traditional three-side arrangement is changed into the opposite two-side arrangement, and the axial lead of the side cylinder is not fixed to be parallel to the table top of the workbench, but can form a certain angle with the table top of the workbench, so that the clamping and pressing pipe fitting is not parallel to the table top of the workbench, but can be arranged in parallel to the table top of the workbench, therefore, the processing quantity of the clamping and pressing pipe fitting in each processing cycle is not limited by the installation direction of the side cylinder, and the processing quantity is obviously increased; and secondly, the included angle between the axial lead of the side cylinder and the table surface of the workbench is adjustable, so that the side cylinder can be used for producing 90-degree clamping and pressing pipe fittings and 45-degree clamping and pressing pipe fittings and straight-through clamping and pressing pipe fittings, and the universality of the internal high-pressure forming machine is greatly enhanced.
Drawings
Fig. 1 is a schematic view of an internal high pressure molding machine according to an embodiment of the present invention.
Fig. 2 is a schematic front view of a novel mold according to an embodiment of the present invention.
Fig. 3 is an isometric view of a novel mold according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of an upper die according to an embodiment of the present invention.
Fig. 5 is a schematic structural view of a lower die according to an embodiment of the present invention.
Reference numerals illustrate:
1. The die comprises a base, 2, a workbench, 3, a cross beam, 4, a stand column, 5, a die locking cylinder, 6, a side cylinder, 61, a sealing head, 7, a supporting seat, 8, a sliding block, 9, a novel die, 9a, an upper die, 9a1, a V-shaped groove, 9a2, a first concave position, 9b, a lower die, 9b1, a base, 9b2, a combining part, 9b21, a protruding part, 9b22 and a second concave position.
Detailed Description
The technical solutions of the present embodiment will be clearly and completely described below with reference to the drawings in the present embodiment, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, this embodiment provides an internal high-pressure forming machine for processing a clamping and pressing pipe fitting, mainly comprising a machine base 1, a workbench 2, a cross beam 3 and a compression cylinder, wherein the workbench 2 is arranged on the machine base 1, the cross beam 3 is erected above the workbench 2 through a vertical column 4, the compression cylinder comprises a mold locking cylinder 5 and side cylinders 6, the mold locking cylinder 5 is vertically arranged in the cross beam 3, a piston rod of the mold locking cylinder 5 is opposite to the workbench 2, the side cylinders 6 are provided with at least two, the two side cylinders 6 are respectively arranged on the workbench 2 or the machine base 1 through a supporting seat 7 and with a plane where an axial lead of the mold locking cylinder 5 is located as a symmetrical center plane, the side cylinders 6 are connected with the supporting seat 7 through a rotating shaft, and the two side cylinders 6 can rotate in the same plane perpendicular to a horizontal plane. Based on the structure, the side cylinder 6 is changed from the traditional three-face arrangement to the opposite two-face arrangement, and the axial lead of the side cylinder 6 is not fixed to be parallel to the table top of the workbench 2 any more, but can form a certain angle with the table top of the workbench 2, so that the clamping and pressing type pipe fittings are not parallel to the table top of the workbench 2 any more, but can be arranged in parallel to the table top of the workbench 2 in a plurality of ways, therefore, the processing quantity of the clamping and pressing type pipe fittings in each processing cycle is not limited by the installation direction of the side cylinder 6 any more, and the processing quantity is obviously increased; secondly, the included angle between the axial lead of the side cylinder 6 and the table surface of the workbench 2 is adjustable, so that the side cylinder can be used for producing 90-degree clamping and pressing type pipe fittings and 45-degree clamping and pressing type pipe fittings, and the universality of the internal high-pressure forming machine is greatly enhanced. Further, the table top of the workbench 2 is preferably rectangular, the supporting seats 7 of the two side cylinders 6 are installed at two ends of the workbench 2, each supporting seat 7 comprises two supporting plates which are oppositely arranged, an installation interval is reserved between the two supporting plates, through holes are formed in the supporting plates, the rotating shafts are arranged on two sides of the side cylinders 6, the side cylinders 6 are arranged in the installation interval, and the rotating shafts penetrate through the through holes to realize rotary connection between the side cylinders 6 and the supporting seats 7. The four stand columns 4 are generally arranged, the four stand columns 4 are arranged on the table surface of the workbench 2 and are positioned between the two side cylinders 6, the top ends of the four stand columns 4 respectively support four corners of the cross beam 3, and the mold locking cylinder 5 is arranged in the middle of the cross beam 3. A sliding block 8 connected with a piston rod of the mold locking cylinder 5 is further arranged between the cross beam 3 and the workbench 2, and the sliding block 8 is sleeved on the upright post 4 and can slide up and down along the upright post 4.
On the basis of fig. 1, in combination with fig. 2 to 5, the internal high-pressure forming machine for processing the clamping and pressing pipe fitting needs to be matched with a novel die 9 for use when working. The novel die 9 comprises an upper die 9a and a lower die 9b, wherein the upper die 9a is arranged at the bottom of the sliding block 8, the lower die 9b is arranged on the table top of the workbench 2, and the upper die 9a is opened and closed with the lower die 9b through the up-and-down movement of the sliding block 8. Specifically, the bottom end surface of the upper die 9a is provided with a V-shaped groove 9a1, the side wall of the V-shaped groove 9a1 is provided with a first concave position 9a2, and the extending direction of the first concave position 9a2 is perpendicular to the extending direction of the V-shaped groove 9a 1; the lower die 9b comprises a base 9b1 and a combining part 9b2 arranged at the top end of the base 9b1, the combining part 9b2 is an isosceles triangle similar to the V-shaped groove 9a1 in shape, the top angle of the combining part 9b2 faces upwards, a protruding part 9b21 similar to the isosceles triangle is arranged at the top angle position, two side walls of the protruding part 9b21 protrude out of two side walls of the combining part 9b2 respectively, a second concave position 9b22 corresponding to the first concave position 9a2 is arranged on the surface of the protruding part 9b21, and when the upper die 9a and the lower die 9b are closed, the first concave position 9a2 and the second concave position 9b22 enclose a forming cavity for accommodating the clamping and pressing pipe fitting. The head end of the piston rod of the side cylinder 6 is provided with a sealing head 61, and the side cylinders 6 positioned at the two sides of the V-shaped groove 9a1 extend the sealing head 61 into the forming cavity and withdraw the forming cavity by utilizing the extension and contraction of the piston rod. Based on the structure of the forming cavities, the clamping and pressing type pipe fitting is not parallel to the table surface of the workbench 2, but is perpendicular to the table surface of the workbench 2, so that a plurality of first concave positions 9a2 can be arranged in parallel along the trend of the V-shaped groove 9a1, correspondingly, a plurality of second concave positions 9b22 can be arranged in parallel on the protruding part 9b21, a plurality of forming cavities are obtained, and the relative positions of each forming cavity and the side cylinder 6 are the same. Thus, in the case of a limited volume of the new mould 9, the forming cavity of the new mould 9 can be provided more than in the case of a conventional new mould 9. On the basis, the piston rods of the side cylinders 6 can be provided with a plurality of sealing heads 61 according to the number of the forming cavities, so that the function of simultaneously processing a plurality of clamping and pressing pipe fittings in one processing cycle is realized, and the processing efficiency is remarkably improved.
It should be noted that, according to the type of the snap-in pipe fitting to be produced, the opening angle of the V-shaped groove 9a1 and the apex angle of the protruding portion 9b21 of the novel die 9 are also different, and the correspondence relationship between them is: the opening angle of the V-shaped groove 9a1 (or the apex angle of the protruding portion 9b 21) is the angle of the produced snap-in pipe fitting, for example, the novel die 9 having the opening angle of the V-shaped groove 9a1 of 45 ° is used for producing a 45 ° snap-in pipe fitting, and the novel die 9 having the opening angle of the V-shaped groove 9a1 of 90 ° is used for producing a 90 ° snap-in pipe fitting. Since the opening angle of the V-groove 9a1 ranges from 0 ° to 180 °, the novel die can be used for machining a snap-fit pipe having a curvature of more than 0 ° and less than 180 ° theoretically.
When the internal high-pressure forming machine is matched with the novel die 9 for use, the included angle between the axial lead of the side cylinder 6 and the table top of the workbench 2 is adjusted according to the type of the clamping and pressing pipe fitting produced as required, and then the corresponding novel die 9 is selected for use. Taking processing of 90-degree clamping and pressing pipe fittings as an example, piston rods of the two side cylinders 6 are oppositely arranged, an included angle between the axes of the two side cylinders 6 and the table top of the workbench 2 is adjusted to 45 degrees and fixed, then a novel die 9 with an opening angle of 90 degrees of a V-shaped groove 9a1 is selected to be installed between the workbench 2 and the sliding block 8, and thus an internal high-pressure forming machine for producing the 90-degree clamping and pressing pipe fittings is ready for use. However, if the through type clamping and pressing pipe fitting needs to be processed, a novel die 9 is not needed, and only the piston rods of the two side cylinders 6 are oppositely arranged and adjusted to be parallel to the axis of the two side cylinders 6 and the table top of the workbench 2, and then the traditional through type die is matched. As the included angle between the axial lead of the side cylinder and the table top of the workbench ranges from 0 degrees to 90 degrees, the inner high-pressure forming machine can be matched with a novel die to process clamping and pressing type pipe fittings with the bending degree larger than 0 degrees and smaller than 180 degrees theoretically.
In addition, the internal high-pressure forming machine is the same as the traditional internal high-pressure forming equipment, and further comprises auxiliary systems such as a hydraulic system, a power distribution system, a pressurizing system and the like.
In summary, the high-pressure forming machine in processing clamp-press type pipe fitting that this embodiment provided, it mainly includes frame 1, workstation 2, crossbeam 3, slider 8, mode locking jar 5, side jar 6 and novel mould 9, on frame 1 was located to workstation 2, crossbeam 3 erects in the top of workstation 2 through the stand 4 of vertical setting, mode locking jar 5 vertically installs in crossbeam 3, and the piston rod of mode locking jar 5 just faces workstation 2, slider 8 cover that is connected with the piston rod of mode locking jar 5 is located on stand 4 and can slide from top to bottom along stand 4, novel mould 9 includes upper mould 9a and lower mould 9b, upper mould 9a installs in the bottom of slider 8, lower mould 9b installs in the mesa of workstation 2, upper mould 9a realizes opening and closing with lower mould 9b through the up-down motion of slider 8, side jar 6 is equipped with two at least, two side jar 6 are respectively through supporting seat 7 and use the axial lead of mode locking jar 5 to install on workstation 2 as the plane of symmetry center, and side jar 6 is connected with supporting seat 6 in the same horizontal plane through two side jar 6 can rotate in the same horizontal plane. Compared with the prior art, the method has the following advantages:
1. the side cylinders 6 are changed from the traditional three-side arrangement to the opposite two-side arrangement, the axial lead of the side cylinders 6 is not fixed to be parallel to the table top of the workbench 2, but can form a certain angle with the table top of the workbench 2, so that the clamping and pressing type pipe fittings are not parallel to the table top of the workbench 2, but can be arranged in parallel perpendicular to the table top of the workbench 2, the processing quantity of the clamping and pressing type pipe fittings in each processing cycle is not limited by the installation direction of the side cylinders 6, and the processing quantity is obviously increased;
2. The included angle between the axial lead of the side cylinder 6 and the table surface of the workbench 2 can be adjusted, so that the side cylinder can be used for producing 90-degree clamping and pressing pipe fittings and 45-degree clamping and pressing pipe fittings as well as straight-through clamping and pressing pipe fittings, and the universality of the internal high-pressure forming machine is greatly enhanced.
It should be understood that the terms "first," "second," and the like are used herein to describe various information, but such information should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the invention.
While the foregoing is directed to the preferred embodiments of the present invention, it should be noted that modifications and variations could be made by those skilled in the art without departing from the principles of the present invention, and such modifications and variations are to be regarded as being within the scope of the invention.
Claims (7)
1. The internal high-pressure forming machine for machining the clamping and pressing type pipe fittings is characterized by comprising a machine base, a workbench, a cross beam and a compression cylinder, wherein the workbench is arranged on the machine base, the cross beam is erected above the workbench through a vertically arranged upright post, the compression cylinder comprises a mold locking cylinder and side cylinders, the mold locking cylinder is vertically arranged in the cross beam, a piston rod of the mold locking cylinder is opposite to the workbench, the side cylinders are provided with at least two, the two side cylinders are respectively arranged on the workbench or the machine base through supporting seats and take a plane where the axial lead of the mold locking cylinder is located as a symmetrical center plane, the side cylinders are connected with the supporting seats through rotating shafts, and the two side cylinders can rotate in the same plane vertical to a horizontal plane;
A sliding block connected with a piston rod of the mold locking cylinder is arranged between the cross beam and the workbench, and the sliding block is sleeved on the upright post and can slide up and down along the upright post;
The inner high-pressure forming machine further comprises a novel die, the novel die comprises an upper die and a lower die, the upper die is arranged at the bottom of the sliding block, the lower die is arranged on the table top of the workbench, and the upper die is opened and closed with the lower die through the up-and-down movement of the sliding block;
The bottom end face of the upper die is provided with a V-shaped groove, a first concave position is arranged on the side wall of the V-shaped groove, the extending direction of the first concave position is perpendicular to the extending direction of the V-shaped groove, the top end of the lower die is provided with a protruding portion corresponding to the V-shaped groove, the protruding portion is isosceles triangle, the surface of the protruding portion is provided with a second concave position corresponding to the first concave position, when the upper die and the lower die are closed, the first concave position and the second concave position enclose a forming cavity for accommodating a clamping and pressing pipe fitting, and the forming cavity is in a vertical inverted V shape.
2. The internal high-pressure forming machine for machining a clamping and pressing pipe fitting according to claim 1, wherein the supporting seat comprises two supporting plates which are oppositely arranged, an installation interval is reserved between the two supporting plates, through holes are formed in the supporting plates, the rotating shafts are arranged on two sides of the side cylinders, the side cylinders are arranged in the installation interval, and the rotating shafts penetrate through the through holes to realize rotary connection between the side cylinders and the supporting seat.
3. The internal high-pressure forming machine for processing a clamping and pressing type pipe fitting according to claim 1, wherein a table top of the workbench is rectangular, supporting seats of the two side cylinders are installed at two ends of the workbench, the upright post is arranged on the table top of the workbench and located between the two side cylinders, and the mold locking cylinder is installed in the middle of the cross beam.
4. The internal high pressure forming machine for processing a press-fit pipe fitting according to claim 1, wherein the lower die comprises a base and a joint portion, the joint portion is provided at a top end of the base, and the protruding portion is provided at a top end of the joint portion.
5. The internal high pressure forming machine for processing a press-fit pipe fitting according to claim 4, wherein the joint portion is an isosceles triangle similar to the protruding portion, the protruding portion is provided at a top corner of the joint portion, and both side walls of the protruding portion protrude from both side walls of the joint portion, respectively.
6. The internal high pressure forming machine for processing a clamping and pressing type pipe fitting according to any one of claims 1 to 5, wherein a head is arranged at the head end of a piston rod of the side cylinder, and the heads of the two side cylinders respectively extend into the forming cavity from two sides of the V-shaped groove.
7. The internal high pressure forming machine for manufacturing a snap-in pipe fitting according to any one of claims 1 to 5, wherein the opening angle of the V-groove is 45 ° or 90 °.
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| CN201711227107.XA CN107866459B (en) | 2017-11-29 | 2017-11-29 | Internal high-pressure forming machine for processing clamping and pressing type pipe fitting |
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| CN201711227107.XA CN107866459B (en) | 2017-11-29 | 2017-11-29 | Internal high-pressure forming machine for processing clamping and pressing type pipe fitting |
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| CN107866459A CN107866459A (en) | 2018-04-03 |
| CN107866459B true CN107866459B (en) | 2024-05-10 |
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| CN110280648B (en) * | 2019-07-29 | 2024-02-23 | 佛山市佳锐智能装备有限公司 | Straight-through water expanding machine |
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