CN211489352U

CN211489352U - Novel sliding pipe expander

Info

Publication number: CN211489352U
Application number: CN201922182044.1U
Authority: CN
Inventors: 郑阿三
Original assignee: Zhejiang Zhenglin Machinery Co ltd
Current assignee: Zhejiang Zhenglin Machinery Co ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2020-09-15
Anticipated expiration: 2029-12-06

Abstract

The utility model discloses a novel slip expander, which comprises a body, the lower terminal surface middle part of body is equipped with the recess, install the connecting plate in the recess, the connecting plate below is equipped with the cylinder, be equipped with the through-hole in the recess, be equipped with a plurality of connecting rods on the connecting plate, the connecting rod inserts in the corresponding through-hole, body up end middle part is connected with the round platform, the up end of body is connected to the lower bottom surface of round platform, the radius of bottom surface is less than the radius of bottom surface down on the round platform, the round platform side is surrounded by a plurality of pieces of propping, prop piece and through-hole one-to-one, prop the piece including the inner inclined plane, the extrados, the spring coil is installed through. The utility model discloses a novel slip expander can carry out the expander processing to thin wall tubulose work pieces such as motor housing. And adjusting the inner diameter of the tubular workpiece according to the requirement, and repairing the change of the inner roundness caused by machining. The method has the advantages of simple operation, convenient die change, high processing efficiency and the like.

Description

Novel sliding pipe expander

Technical Field

The utility model belongs to the technical field of the machining tool, concretely relates to novel slip expander.

Background

When producing a thin-walled tubular workpiece such as the motor housing 1 shown in fig. 1, the inner diameter of the purchased raw material is often difficult to meet the design requirements. The raw material needs to be subjected to pipe expanding processing by using pipe expanding equipment, so that the inner diameter can be correspondingly adjusted according to the design. Meanwhile, the internal roundness of the tubular product is easy to change after the tubular product is cut and the like, and the quality of the final product (such as a motor) is affected if the tubular product is not repaired and adjusted.

The existing pipe expanding modes mainly comprise two modes, one mode is that the motor shell is expanded manually, and the other mode is that the pipe is expanded through pipe expanding equipment. The manual pipe expanding efficiency is low, and the labor intensity is high.

The existing pipe expanding equipment is complex in structure, when the existing pipe expanding equipment is utilized, the pipe expanding process is complex, pipe expanding cannot be completed at one time, and the pipe expanding needs to be repaired for many times so that the good roundness of the motor shell can be ensured. The prior art discloses a pipe expanding device of a full-automatic pipe expanding forming machine for a compressor shell, which is named as 201820310338.0. The disclosed pipe expanding device comprises a base body, an oil cylinder and a pipe expanding die, and pipe expansion is carried out through the pipe expanding die. When the device is used for expanding the pipe, secondary auxiliary pipe expanding is needed, so that the whole pipe expanding process is complex. And the pipe expanding arc plate of the device for expanding the pipe is tightly hooped on the conical mandrel through the upper and lower elastic hooping rings, and the expansion and the furling of the pipe expanding arc plate are realized through the elastic action of the hooping rings. The elastic tightening ring is easy to break in the use process of back-and-forth expansion and furling, so that the pipe expanding arc plate is easy to fall off, and the elastic tightening ring needs to be replaced at irregular intervals, so that the pipe expanding process is more complicated.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model discloses a technical scheme is: a novel sliding pipe expander comprises a cylindrical body which is vertically arranged upwards, a groove with a circular cross section is arranged in the middle of the lower end face of the body, a connecting plate is movably mounted in the groove up and down, a cylinder which is vertically arranged upwards is arranged below the connecting plate, a piston rod of the cylinder points to the middle of the connecting plate, a through hole which is communicated with the upper end face of the body is arranged in the groove, a plurality of connecting rods are arranged on the connecting plate, the connecting rods are in one-to-one correspondence with the through holes and movably inserted into the corresponding through holes, a round platform is connected in the middle of the upper end face of the body, the lower bottom face of the round platform is connected with the upper end face of the body, the radius of the upper bottom face of the round platform is smaller than that of the lower bottom face, the periphery of the side face of the round platform is respectively surrounded by a plurality of supporting pieces which are, prop the recess that is equipped with of piece extrados, all recesses that prop the piece connect gradually into annular groove, install the spring ring in the annular groove, the through-hole is located the corresponding middle part that props the lower terminal surface of piece, the top of bottom surface is equipped with cyclic annular preforming on the round platform, and the middle part of cyclic annular preforming is equipped with the centre bore, and cyclic annular preforming reciprocates by pneumatic cylinder control, prop the piece and all be located the below of cyclic annular preforming, the diameter of centre bore is greater than the diameter of bottom surface on the round platform, and cyclic annular preforming is coaxial with the round platform.

Preferably, in the above technical solution, the circular truncated cone is integrally formed with the body.

Preferably, in the above technical solution, the number of the brace pieces is 4, and the number of the connecting rods and the number of the through holes are 4.

Preferably, as for the above technical solution, the number of the grooves on the outer arc surface of the supporting sheet is two, one of the grooves is close to the upper end of the outer arc surface of the supporting sheet and is set as an upper groove, the other groove is close to the lower end of the outer arc surface of the supporting sheet and is set as a lower groove, the number of the ring grooves is two, one of the ring grooves is formed by connecting the upper grooves of all the supporting sheets and is set as an upper groove, the other ring groove is formed by connecting the lower grooves of all the supporting sheets and is set as a lower groove, the number of the spring rings is two, one of the spring rings is installed in the upper groove, and the other spring ring.

Preferably, the supporting pieces have multiple specifications, the supporting pieces of the same specification are encircled into a round pipe body through a spring ring, the round pipe body is sleeved on the round table, and the diameters of the round pipe bodies encircled by the supporting pieces of different specifications are different.

The utility model has the advantages that: the utility model discloses a novel slip expander can carry out the expander processing to thin wall tubulose work pieces such as motor housing. And adjusting the inner diameter of the tubular workpiece according to the requirement, and repairing the change of the inner roundness caused by machining. The method has the advantages of simple operation, convenient die change, high processing efficiency and the like.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic cross-sectional view of the present invention;

fig. 3 is a schematic cross-sectional view of the body.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in figures 1-3, a novel sliding pipe expander comprises a cylindrical body 2 which is vertically arranged upwards, a groove 3 with a circular cross section is arranged in the middle of the lower end surface of the body 2, a connecting plate 4 is movably arranged in the groove 3 up and down, a cylinder 5 which is vertically arranged upwards is arranged below the connecting plate 4, a piston rod 6 of the cylinder 5 points to the middle of the connecting plate 4, a through hole 7 which is communicated with the upper end surface of the body 2 is arranged in the groove 3, a plurality of connecting rods 8 are arranged on the connecting plate 4, the connecting rods 8 and the through holes 7 are in one-to-one correspondence and movably inserted into the corresponding through holes 7, a round table 9 is connected to the middle of the upper end surface of the body 2, the lower bottom surface of the round table 9 is connected with the upper end surface of the body 2, the radius of the upper bottom surface 10 of the round table 9 is smaller than that of the lower bottom surface, the, the supporting sheet 11 comprises an inner inclined surface 12 attached to the side surface of the circular truncated cone 9 and an outer arc surface 13 perpendicular to the upper end surface of the body 2, grooves are formed in the outer arc surface 13 of the supporting sheet 11, all the grooves of the supporting sheet 11 are sequentially connected into an annular groove, a spring ring 19 is installed in the annular groove, the through hole 7 is located in the middle of the lower end surface of the corresponding supporting sheet 11, an annular pressing sheet 14 is arranged above the upper bottom surface 10 of the circular truncated cone 9, a central hole 15 is formed in the middle of the annular pressing sheet 14, the annular pressing sheet 14 is controlled to move up and down by a hydraulic cylinder 16, the supporting sheet 11 is located below the annular pressing sheet 14, the diameter of the central hole 14 is larger than the diameter of the upper bottom surface 10 of. When a workpiece motor shell 1 is machined, a piston rod 6 of an air cylinder 5 pushes a connecting plate 4 upwards, so that a connecting rod 8 pushes a supporting sheet 11 upwards, the supporting sheet 11 moves upwards along the side face tightly attached to a circular table 9 under the contraction action of a spring ring 19, and contracts towards the center of the circular table 9, and the diameter of the circle surrounded by the supporting sheet 11 is gradually reduced. When the connecting plate 4 contacts the groove 3, the diameter of the circle surrounded by the supporting pieces 11 is in a minimum state, at the moment, the motor shell 1 is sleeved on the circle surrounded by the supporting pieces 11, and the piston rod 6 of the cylinder 5 descends. The hydraulic cylinder 16 controls the annular pressing sheet 14 to descend, the annular pressing sheet 14 continues to descend after the annular pressing sheet 14 contacts the upper end face of the supporting sheet 11, the supporting sheet 11 overcomes the contraction force of the spring ring 19, the diameter of a circle surrounded by the supporting sheet 11 is gradually increased in the descending process, the lower end face of the supporting sheet 11 is contacted with the upper end face of the body 2, the diameter of the circle surrounded by the supporting sheet 11 is the largest, the inner diameter of the motor shell 1 is expanded, and the pipe expanding processing is completed.

Furthermore, the round table 9 and the body 2 are integrally formed, so that the structural strength of the pipe expander is improved.

Furthermore, the number of the supporting pieces 11 is 4, and the number of the connecting rods 8 and the number of the through holes 7 are 4.

Further, the number of the grooves on the extrados of the supporting pieces 11 is two, one of the grooves is close to the upper end of the extrados 13 of the supporting pieces 11 and is set as an upper groove, the other groove is close to the lower end of the extrados 13 of the supporting pieces 11 and is set as a lower groove, the number of the ring grooves is two, one of the ring grooves is formed by connecting the upper grooves of all the supporting pieces 11 and is set as an upper groove 17, the other ring groove is formed by connecting the lower grooves of all the supporting pieces and is set as a lower groove 18, the number of the spring rings 19 is two, one of the spring rings 19 is installed in the upper groove 17, and the other spring ring 19 is installed in the lower.

Furthermore, the supporting sheets 11 have multiple specifications, the supporting sheets 11 of the same specification are enclosed into a round pipe body through a spring ring 19, and the diameters of the round pipe bodies enclosed by the supporting sheets 11 of different specifications are different. When the motor shells 1 of different specifications are processed by expanding, the round pipe body formed by the supporting pieces 11 of the same specification is taken down, and the round pipe body formed by the supporting pieces 11 of the other specification is sleeved on the circular table 9, so that the quick shape change of the expander is realized, and tools such as a screwdriver and the like are not needed in the shape change process.

It is worth mentioning that the technical features of the cylinder 5, the hydraulic cylinder 16, the spring ring 19, etc. related to the patent application of the present invention should be regarded as the prior art, and the specific structure, the working principle of these technical features and the control mode and the space arrangement mode that may be related to adopt the conventional selection in the field, which should not be regarded as the invention point of the present invention, the present invention does not further specifically expand the detailed description.

Having described in detail preferred embodiments of the present invention, it is to be understood that modifications and variations can be made by persons skilled in the art without inventive faculty, and therefore all technical solutions which can be obtained by a person skilled in the art based on the concepts of the present invention through logic analysis, reasoning or limited experimentation will fall within the scope of protection defined by the claims.

Claims

1. A novel sliding pipe expander is characterized by comprising a cylindrical body which is vertically arranged upwards, a groove with a circular cross section is arranged in the middle of the lower end face of the body, a connecting plate is movably mounted in the groove up and down, a cylinder which is vertically arranged upwards is arranged below the connecting plate, a piston rod of the cylinder points to the middle of the connecting plate, a through hole which is communicated with the upper end face of the body is arranged in the groove, a plurality of connecting rods are arranged on the connecting plate, the connecting rods correspond to the through holes one by one and movably inserted into the corresponding through holes, a round platform is connected in the middle of the upper end face of the body, the lower bottom face of the round platform is connected with the upper end face of the body, the radius of the upper bottom face of the round platform is smaller than that of the lower bottom face, the periphery of the side face of the round platform is respectively surrounded by a plurality of supporting pieces which are arranged in a circumferential array, prop the recess that is equipped with of piece extrados, all recesses that prop the piece connect gradually into annular groove, install the spring ring in the annular groove, the through-hole is located the corresponding middle part that props the lower terminal surface of piece, the top of bottom surface is equipped with cyclic annular preforming on the round platform, and the middle part of cyclic annular preforming is equipped with the centre bore, and cyclic annular preforming reciprocates by pneumatic cylinder control, prop the piece and all be located the below of cyclic annular preforming, the diameter of centre bore is greater than the diameter of bottom surface on the round platform, and cyclic annular preforming is coaxial with the round platform.

2. The new sliding expander of claim 1, wherein said circular table is integrally formed with said body.

3. A novel sliding expander as claimed in claim 2, wherein said brace members are 4 in number and said connecting rods and through holes are 4 in number.

4. The novel sliding pipe expander as claimed in claim 3, wherein the number of the grooves on the outer arc surface of the supporting plate is two, one of the grooves is disposed adjacent to the upper end of the outer arc surface of the supporting plate and is defined as an upper groove, the other groove is disposed adjacent to the lower end of the outer arc surface of the supporting plate and is defined as a lower groove, and the number of the ring grooves is two, wherein one of the ring grooves is formed by connecting the upper grooves of all the supporting plates and is defined as an upper groove, the other ring groove is formed by connecting the lower grooves of all the supporting plates and is defined as a lower groove, and the number of the spring rings is two, one of the spring rings is installed in the upper groove, and the other spring ring.

5. The novel sliding pipe expander as claimed in claim 4, wherein the supporting pieces have multiple specifications, the supporting pieces of the same specification are enclosed into a round pipe body by a spring ring, the round pipe body is sleeved on the round table, and the diameters of the round pipe bodies enclosed by the supporting pieces of different specifications are different.