CN214977245U

CN214977245U - Necking equipment for thin-wall pipe fitting

Info

Publication number: CN214977245U
Application number: CN202022897300.8U
Authority: CN
Inventors: 黄伟; 林爱素
Original assignee: Ningbo Tianxin Metal Hose Co ltd
Current assignee: Ningbo Tianxin Metal Hose Co ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-12-03
Anticipated expiration: 2030-12-04

Abstract

The utility model relates to a thin-wall pipe fitting necking device, which comprises a necking clamp and a pipe clamping rotating machine for clamping a pipe fitting and driving the pipe fitting to rotate, wherein the pipe clamping rotating machine is fixed on a frame; its design point lies in throat equipment includes that it is tight radially to the pipe fitting formation clamp along the pipe fitting to the throat anchor clamps of pipe fitting outer wall extrusion formation indent ring channel when rotatory along with the pipe fitting, and drive throat anchor clamps along pipe fitting axial motion's moving mechanism, moving mechanism include for the sliding bottom that the frame slides and sets up, and drive sliding bottom along pipe fitting endwise slip's second power cylinder, the second power cylinder is fixed in the frame, throat anchor clamps are fixed in sliding bottom. According to the structure, the necking clamp is utilized to realize the in-pipe necking, and the necking clamp is stretched again to realize the stretching mode, so that the caliber size of the necking can be effectively ensured, the pipe fitting is not easy to wrinkle or deform due to damage during the stretching of the necking, and the necking quality is effectively ensured.

Description

Necking equipment for thin-wall pipe fitting

Technical Field

The utility model relates to a pipe fitting processing field is a thin-walled tube piece throat equipment.

Background

The necking process is a forming process for reducing the mouth of a preformed pipe fitting or pipe blank to a required size through a necking die holder. The existing necking process is generally suitable for pipe fittings with the wall thickness of more than 0.25MM, and the requirements of the thin-wall pipe fittings are difficult to meet, mainly because the thin-wall pipe fittings are easy to wrinkle when being subjected to necking in a necking die seat, so that the quality is unqualified. In the prior art, as published in the patent application publication No. CN107745051A published in chinese patent literature, published in 2018, 3 and 2, the invention application name is "a die and a method for reducing a thin-wall metal tube, which includes a reducing die body provided with a central reducing through hole, the central reducing through hole sequentially includes, from front to back: the diameter of the tail end straight line section is larger than that of the middle straight line section, a plurality of fan-shaped cutting grooves which take the central shaft of the middle straight line section as the axis are uniformly distributed on the cone forming section and the middle straight line section, and the intersection positions of every two of the fan-shaped cutting grooves, the cone forming section and the middle straight line section are all in circular arc transition. Although the structure can realize thin-wall necking, the precision size requirement of the die is high, the investment cost is high, and the necking machining size is not easy to adjust, so that the large-batch industrial machining is difficult to realize. Therefore, the existing thin-wall pipe necking equipment needs to be improved.

Disclosure of Invention

In order to overcome the defects, the utility model aims to provide a thin-wall pipe fitting necking equipment to the field, which ensures that the input cost of the existing similar pipe fitting necking equipment is higher, the necking size is not easy to adjust, and the technical problem of large-batch industrial processing and use is difficult to satisfy. The purpose is realized by the following technical scheme.

A kind of thin-walled tube piece throat apparatus, the throat apparatus includes the throat clamp, and clamp the tube rotating machine that the clamp tube piece and drive the tube piece to rotate, the clamp tube rotating machine is fixed to stander; its structural feature lies in throat equipment includes that it is tight radially to the pipe fitting formation clamp along the pipe fitting to the throat anchor clamps of pipe fitting outer wall extrusion formation indent ring channel when rotatory along with the pipe fitting, and drive throat anchor clamps along pipe fitting axial motion's moving mechanism, moving mechanism include for the sliding bottom that the frame slides and sets up, and drive sliding bottom along pipe fitting endwise slip's second power cylinder, the second power cylinder is fixed in the frame, throat anchor clamps are fixed in sliding bottom. Through the structure, the necking clamp is utilized to realize the necking in the pipe, and the mode of stretching the necking is realized by stretching the necking clamp, so that the caliber size of the necking can be effectively ensured, the pipe fitting is not easy to wrinkle or deform due to damage during the stretching of the necking, and the necking quality is effectively ensured.

The necking clamp comprises a clamp body and a clamping mechanism, wherein the front section of the clamp body is an elastic clamping section, the rear section of the clamp body is a cylindrical guide section, the elastic clamping section forms at least two parts which are uniformly distributed along the circumferential direction, deformation gaps are formed among the circumferential direction of each part, the outer circumferential surface of the elastic clamping section is a conical surface with the outer diameter size gradually reduced from the front end to the rear section, a working cavity matched with the length of the necking section of the pipe fitting is arranged inside the elastic clamping section, and the front end of the elastic clamping section is provided with a clamping part which clamps the pipe fitting within the range of the deformation gaps and forms the annular groove; clamping mechanism includes fixing base and first power cylinder, and fixing base and first power cylinder are fixed in same sliding base, be equipped with in the fixing base and cup joint the work guide hole of elastic clamping section conical surface and counterbalance contact, and with the cylindricality guide hole of guide section cooperation and holding anchor clamps body axial motion, the connection of the guide section rear end of anchor clamps body drives anchor clamps body axial motion the piston rod of first power cylinder, and when the anchor clamps body moves towards the rear end direction along with first power cylinder, the conical surface of anchor clamps body receives the work guide hole extrusion of fixing base makes the clamp part of anchor clamps body form and presss from both sides tightly. The necking clamp is simple in structure, easy to adjust the size of a necking, capable of achieving automatic necking operation and guaranteeing the forming quality of the necking.

The clamping part of the clamp body is detachably connected with the elastic clamping section. Through this structure, conveniently change clamping part to be applicable to different throat operating modes.

As another scheme of the necking clamp, the necking clamp comprises a clamp and a clamping mechanism, the clamp comprises at least two chucks circumferentially distributed relative to the pipe fitting and a clamping seat for clamping the chucks towards the pipe fitting to form a guide, the front end of the clamping seat is provided with a cavity matched with the length of the necking section of the pipe fitting, the cavity of the clamping seat is circumferentially provided with a guide hole matched with the expansion of the chucks, one end of each chuck extends into the cavity and is provided with a clamping part for extruding the pipe fitting and forming the annular groove, the other end of each chuck extends out of the guide hole and is provided with a guide block limited on the outer side of the guide hole, and a reset spring sleeved on the chuck is arranged between the guide block and the outer end of the guide hole; the clamping mechanism comprises a guide push rod and a first power cylinder, the clamping seat is provided with a guide sliding hole matched with the guide push rod to slide in a telescopic mode, one end of the guide push rod extends out of the guide sliding hole to be in contact with a guide block at the outer end of the chuck, the other end of the guide push rod extends out of the guide sliding hole to be connected with a piston rod of the first power cylinder, and when the guide push rod moves along with the pushing action of the first power cylinder, the guide push rod pushes the guide block and enables the chuck to move towards the cavity of the clamping seat, namely, the clamping part of the chuck reaches the position where the pipe fitting is clamped and the annular groove is formed; the clamping seat and the first power cylinder are fixed on the same sliding base. By adopting the necking equipment, the same structure is simpler, the necking size is easy to adjust, the automatic necking operation can be realized, and the necking forming quality is ensured.

And a positioning mold core matched with the inner diameter of the pipe fitting to be necked is fixedly arranged in the cavity of the clamping seat. Through the structure, the positioning of the pipe end of the pipe fitting to be reduced is realized, the stability of reducing operation is improved, and the reducing quality is favorably ensured.

One of the contact parts of the guide push rod and the guide block of the clamp is a rod, and the other contact part is an inclined plane. The axial motion of the guide push rod is linked with the guide block to drive the chuck to move in a telescopic way through force transmission formed by matching the rod and the inclined plane, and the clamping operation of the chuck on the pipe fitting is realized.

The first power cylinder and the second power cylinder are any one of an air cylinder, a hydraulic cylinder or an electric cylinder. The axial force can be provided, and the purpose of pushing and pulling is achieved.

The utility model discloses overall structure is comparatively simple, and assembly use is comparatively convenient, and throat shaping efficiency is higher, and size precision is good, and the throat bore is adjusted comparatively conveniently, satisfies the demand of big batch industrial processing production, is particularly useful for the thin wall pipe fitting throat processing that the wall thickness size is less than 0.25mm and uses, or the institutional advancement of similar throat equipment.

Drawings

Fig. 1 is a schematic structural view of a version of the necking apparatus of the present invention, partially sectioned and framed.

Fig. 2 is an enlarged schematic view of a framed portion of fig. 1.

Fig. 3 is a schematic structural view of an end face of the clamp body in fig. 1.

Fig. 4 is a schematic perspective view of the clamp body in fig. 1.

Fig. 5 is a schematic structural view of a second embodiment of the necking apparatus of the present invention, partially sectioned and framed.

Fig. 6 is an enlarged schematic view of the framing portion of fig. 5.

Fig. 7 is a schematic view of the structure of the clamp of fig. 5.

Fig. 8 is a schematic perspective view of fig. 7.

The sequence numbers and names in the figure are: 1. the pipe fitting comprises a pipe fitting body, a clamp 201, a clamping head, a clamp part 202, a clamping part 203, a guide block 3, a pipe clamping rotating machine 4, a clamp body 401, an elastic clamping section 402, a guide section 403, a conical surface 404, a working cavity 405, a clamping part 406, a deformation gap 5, a fixed seat 501, a working guide hole 502, a cylindrical guide hole 6, a first power cylinder 7, a sliding base 8, a second power cylinder 9, a frame 10, a clamping seat 1001, a cavity 1002, a guide hole 1003, a guide sliding hole 11, a return spring 12, a positioning mold core 13 and a guide push rod.

Detailed Description

The invention will now be further described with reference to the accompanying drawings.

The necking equipment comprises a necking clamp and a pipe clamping rotating machine 3 which clamps a pipe fitting 1 and drives the pipe fitting to rotate, wherein the pipe clamping rotating machine is fixed on a rack 9. The necking equipment comprises a necking clamp which is used for forming a clamping effect on the pipe fitting along the radial direction of the pipe fitting and extruding the outer wall of the pipe fitting to form an inwards concave annular groove when the pipe fitting rotates, and a moving mechanism which drives the necking clamp to move along the axial direction of the pipe fitting, wherein the moving mechanism comprises a sliding base 7 which is arranged in a sliding mode relative to a rack, and a second power cylinder 8 which drives the sliding base to slide along the axial direction of the pipe fitting, the second power cylinder is an air cylinder, a hydraulic cylinder or an electric cylinder, the second power cylinder is fixed on the rack, and the necking clamp is fixed on the sliding base.

As shown in fig. 1-4, the first embodiment of the necking clamp of the present invention is specifically: the throat anchor clamps include anchor clamps body 4, clamping mechanism, the anterior segment of anchor clamps body is elastic clamping section 401, the back end is the direction section 402 of cylindricality, elastic clamping section forms evenly distributed's two at least parts along circumference, and be equipped with deformation clearance 406 between each part circumference, elastic clamping section's outer peripheral face is the conical surface 403 that front end to back end external diameter size diminishes, elastic clamping section's inside is equipped with the working chamber 404 of adaptation pipe fitting 1 throat section length, elastic clamping section's front end is equipped with the clamping part 405 that presss from both sides tight pipe fitting and form the ring channel in deformation clearance within range. The clamping mechanism comprises a fixed seat 5 and a first power cylinder 6, and the fixed seat and the first power cylinder are fixed on the same sliding base 7. Be equipped with in the fixing base and cup joint the work guide hole 501 that elasticity presss from both sides tight section conical surface and counterbalance contact to and with the cooperation of direction section and keep the cylindricality guide hole 502 of anchor clamps body axial motion, the piston rod of the first power cylinder that drives anchor clamps body axial motion is connected to the direction section rear end of anchor clamps body, and when the anchor clamps body moved towards the rear end direction along with first power cylinder, the conical surface of anchor clamps body was extruded by the work guide hole of fixing base, made the clamp part of anchor clamps body form and press from both sides tightly. The first power cylinder is any one of an air cylinder, a hydraulic cylinder or an electric cylinder.

In order to facilitate the adaptation to necking processes of different sizes, the clamping portion 405 of the clamp body 4 is detachably connected to the elastic clamping section 401, and as shown in fig. 3, a bolt is used to fix the clamping portion and the end face of the elastic clamping section. Therefore, the size of the necking can be adjusted by replacing the clamping part, and the adjustment is convenient.

As shown in fig. 5 to 8, a second embodiment structure of the necking jig specifically includes: the throat anchor clamps include anchor clamps 2, clamping mechanism, anchor clamps include two at least chucks 201 for 1 circumference distribution of pipe fitting, and press from both sides tight seat 10 that forms the direction to the chuck towards the pipe fitting direction clamp, it is equipped with the cavity 1001 of adaptation pipe fitting throat length to press from both sides tight seat front end, the cavity circumference of pressing from both sides tight seat is equipped with the flexible guide hole 1002 of adaptation chuck, chuck one end stretches into in the cavity, and this end is equipped with the clamp part 202 that extrudees the pipe fitting and form the ring channel, the other end stretches out the guide hole and is equipped with spacing guide block 203 in the guide hole outside, be equipped with the reset spring 11 who cup joints in the chuck between guide block and the guide hole outer end. The clamping mechanism comprises a guide push rod 13 and a first power cylinder 6, the clamping base is provided with a guide sliding hole 1003 matched with the guide push rod to slide in a telescopic mode, one end of the guide push rod extends out of the guide sliding hole to be in contact with an inclined plane of a guide block at the outer end of the chuck, the other end of the guide push rod extends out of the guide sliding hole to be connected with a piston rod of the first power cylinder, when the guide push rod moves along with the pushing action of the first power cylinder, the rod end of the guide push rod pushes the inclined plane of the guide block, the chuck moves towards the cavity of the clamping base, and namely the clamping portion of the chuck reaches the position where the pipe fitting is clamped and the annular groove 101 is formed. The clamping seat and the first power cylinder are both fixed on the same sliding base 7, and the first power cylinder is any one of an air cylinder, a hydraulic cylinder or an electric cylinder.

In order to further ensure the stability of the necking process and the necking quality, a positioning mold core 12 for positioning and matching the inner diameter of the pipe fitting 1 to be subjected to necking is fixedly arranged in the cavity 1001 of the clamping seat 10.

The working process of the first necking equipment comprises the following steps: the steel pipe to be reduced is clamped and fixed on the pipe clamping rotating machine 3, then the second power cylinder 8 is controlled to push the sliding base 7 to drive the clamp body 4 to move, the section of the steel pipe to be reduced extends into the working cavity 404 of the clamp body, then the pipe clamping rotating machine is opened to drive the steel pipe to rotate, meanwhile, the first power cylinder 6 is controlled to work, the clamp body is slowly pulled by the first power cylinder, the clamping portion 405 of the clamp body slowly clamps the steel pipe, inward extrusion is formed on the pipe wall of the steel pipe until the set depth is reached, and at the moment, the annular groove with the required concave size is formed on the outer wall of the steel pipe. And then, controlling the second power cylinder 8 to slowly pull the sliding base 7 to drive the fixed seat 5, the clamp body and the first power cylinder to move along the axial direction of the steel pipe together, and enabling the clamping part of the clamp body to move along the axial direction of the necking end of the steel pipe until the clamping part is separated from the port of the steel pipe, so that the necking section of the steel pipe is formed, and the necking operation of the steel pipe is finished once.

The operation of the second necking device is substantially similar to that of the first necking device, and only the clamping process of the clamp 2 is different, mainly in that the clamping head 201 of the clamp forms clamping when the guide push rod 13 is pushed by the first power cylinder 6, and vice versa, the clamping is released.

The above contents are intended to illustrate the technical means of the present invention, and do not limit the technical scope of the present invention. Obvious modifications or substitutions for the present invention by a person of ordinary skill in the art in combination with the prior art also fall within the protection scope of the present invention.

Claims

1. A thin-wall pipe fitting necking equipment comprises a necking clamp and a pipe clamping rotating machine (3) which clamps a pipe fitting (1) and drives the pipe fitting to rotate, wherein the pipe clamping rotating machine is fixed on a rack (9); its characterized in that throat equipment includes and radially forms to the pipe fitting along pipe fitting (1) and presss from both sides tightly to the pipe fitting to extrude the throat anchor clamps that form the indent ring channel to pipe fitting outer wall when rotatory along with the pipe fitting, and drive throat anchor clamps along pipe fitting axial motion's moving mechanism, moving mechanism include for sliding base (7) that frame (9) slided and set up, and drive sliding base along pipe fitting endwise slip's second power cylinder (8), the second power cylinder is fixed in the frame, throat anchor clamps are fixed in sliding base.

2. The thin-wall pipe necking equipment of claim 1, wherein the necking clamp comprises a clamp body (4) and a clamping mechanism, the front section of the clamp body is an elastic clamping section (401), the rear section of the clamp body is a cylindrical guide section (402), the elastic clamping section is formed into at least two parts which are uniformly distributed along the circumferential direction, deformation gaps (406) are arranged among the parts in the circumferential direction, the outer circumferential surface of the elastic clamping section is a conical surface (403) with the outer diameter size gradually reduced from the front end to the rear section, a working cavity (404) matched with the length of the pipe necking section is arranged inside the elastic clamping section, and the front end of the elastic clamping section is provided with a clamping part (405) which clamps the pipe (1) in the deformation gap range and forms the annular groove (101); clamping mechanism includes fixing base (5) and first power cylinder (6), and fixing base and first power cylinder are fixed in same sliding bottom (7), be equipped with in the fixing base and cup joint work guide hole (501) that elasticity presss from both sides tight section conical surface and counterbalance contact, and with the cooperation of direction section keeps anchor clamps body axial motion's cylindricality guide hole (502), and the connection of the direction section rear end of anchor clamps body drives anchor clamps body axial motion the piston rod of first power cylinder, and when the anchor clamps body moves towards the rear end direction along with first power cylinder, the conical surface of anchor clamps body receives the work guide hole extrusion of fixing base makes the clamp part of anchor clamps body form to press from both sides tightly.

3. The thin-walled tube necking apparatus of claim 2, wherein the clamping portion (405) of the clamp body (4) is removably connected with respect to the elastic clamping section (401).

4. The thin-wall pipe necking equipment of claim 1, wherein the necking clamp comprises a clamp (2) and a clamping mechanism, the clamp comprises at least two chucks (201) circumferentially distributed relative to the pipe (1) and a clamping seat (10) for clamping the chucks towards the pipe to form a guide, the front end of the clamping seat is provided with a cavity (1001) matched with the length of the necking section of the pipe, the cavity of the clamping seat is circumferentially provided with a guide hole (1002) matched with the expansion and contraction of the chucks, one end of each chuck extends into the cavity and is provided with a clamping part (202) for extruding the pipe and forming the annular groove (101), the other end of each chuck extends out of the guide hole and is provided with a guide block (203) limited outside the guide hole, and a reset spring (11) sleeved on each chuck is arranged between each guide block and the outer end of the guide hole; the clamping mechanism comprises a guide push rod (13) and a first power cylinder (6), the clamping seat is provided with a guide sliding hole (1003) matched with the guide push rod to slide in a telescopic mode, one end of the guide push rod extends out of the guide sliding hole to be in contact with a guide block at the outer end of the chuck, the other end of the guide push rod extends out of the guide sliding hole to be connected with a piston rod of the first power cylinder, and when the guide push rod moves along with the pushing action of the first power cylinder, the guide push rod pushes the guide block and enables the chuck to move towards the cavity of the clamping seat, namely, the clamping part of the chuck reaches the position where the pipe fitting is clamped and the annular groove is formed; the clamping seat and the first power cylinder are fixed on the same sliding base (7).

5. The thin-walled tube necking equipment of claim 4, wherein a positioning mold core (12) matched with the inner diameter of the tube (1) to be necked is fixedly arranged in the cavity (1001) of the clamping seat (10).

6. The thin-walled tube necking apparatus of claim 4, wherein one of the contact portions of the guide push rod (13) and the guide block (203) of the jig (2) is a rod and the other is a slope.

7. The thin-wall pipe necking equipment of claim 2 or 4, wherein the first power cylinder (6) and the second power cylinder (8) are both any one of a pneumatic cylinder, a hydraulic cylinder or an electric cylinder.