CN109228286B

CN109228286B - Straight pipe fine drawing device

Info

Publication number: CN109228286B
Application number: CN201811262455.5A
Authority: CN
Inventors: 沈皓; 袁志伟
Original assignee: Jiangyin Pivot Automotive Co ltd
Current assignee: Jiangyin Pivot Automotive Co ltd
Priority date: 2018-10-27
Filing date: 2018-10-27
Publication date: 2020-10-16
Anticipated expiration: 2038-10-27
Also published as: CN109228286A

Abstract

The invention relates to a straight pipe fine drawing device which comprises a rack, wherein a workbench is arranged on the rack, a stretching heating tool is arranged on the workbench and comprises a clamping mechanism used for fixing the fixed end of a straight pipe, a heating mechanism used for heating the end to be stretched of the straight pipe, a stretching mechanism used for stretching the heating part of the straight pipe to reduce the diameter, and the clamping mechanism and the stretching mechanism are respectively positioned at two ends of the heating mechanism and can be respectively close to or far away from the heating mechanism. This application can realize the quick reducing of nylon tube for the car, and the structure is exquisite, and reasonable in design has guaranteed the accurate high efficiency of reducing operation, can realize the batch production operation.

Description

Straight pipe fine drawing device

Technical Field

The invention relates to straight pipe stretching equipment, in particular to fine drawing equipment for a nylon straight pipe.

Background

The development of the automobile industry in China is rapid, the requirements on automobile parts are greatly improved, nylon (polyamide) pipes for automobiles are widely applied, in the automobile assembly production process, valves or joints need to be arranged on the nylon pipes to realize connection between pipelines, meanwhile, valves or joints with corresponding specifications need to be developed, at present, automobiles of different brands and types have the specifications of the nylon pipes which are designed respectively, so that a plurality of fittings of the valves or the joints are caused, in order to match with the pipeline design of customers, the valves or the joints matched with the pipeline specifications often need to be designed, and the cost and the development risk for developing new-specification valves or joints are high.

If can reduce the external diameter of the great nylon straight tube link of specification, make and match with current valve or joint, just so can save the cost of developing new specification valve or joint, will help reducing the risk and the cost that the enterprise developed valve or joint.

Disclosure of Invention

The present invention provides a straight tube tapering device, which can reduce the outer diameter of a straight tube, and reduce the outer diameter of the straight tube to a predetermined value by inserting a core rod into the straight tube and heating and stretching the straight tube.

The technical scheme adopted by the invention for solving the problems is as follows: the utility model provides a straight tube attenuation device, includes the frame, be provided with the workstation in the frame, install tensile heating frock on the workstation, tensile heating frock includes that clamping mechanism is used for the stiff end of fixed straight tube, and heating mechanism is used for heating the tensile end of treating of straight tube, and stretching mechanism is used for tensile messenger's reducing to the heating end of straight tube, clamping mechanism and stretching mechanism are located heating mechanism's both ends respectively, and can heat the mechanism relatively respectively and be close to or keep away from.

In order to ensure axial stretching, a core rod penetrates through the straight pipe, an end cap is arranged at the end part of the core rod, the end face of the straight pipe abuts against the end cap to form a workpiece, the end cap end of the workpiece is a fixed end, and the other end of the workpiece is a stretching end.

Specifically, the clamping mechanism is arranged on the stroke guide rail and comprises more than two groups of clamping units and mandrel fixing seats, the clamping units and the mandrel fixing seats are arranged at intervals along the stroke guide rail, and the mandrel fixing seats are located on the outermost sides and used for fixing fixed ends of workpieces.

Further, arbitrary clamping unit includes first movable base, first movable base activity sets up on the stroke guide rail and can slide along the stroke guide rail, be provided with first die clamping cylinder, the upper and lower clamp block of mutual disposition on the first movable base, press from both sides the piece and fix on first movable base down, go up to press from both sides the piece setting on first die clamping cylinder, press from both sides the piece and do the lift action relatively down and press from both sides the piece and to press from both sides the clamp of work piece or relax from both sides about the piece on the first die clamping cylinder drive.

Preferably, the upper and lower clamping blocks are respectively formed with upper and lower semicircular grooves on respective mating surfaces, and the upper and lower semicircular grooves form a clamping passage of the workpiece in a state where the upper and lower clamping blocks are folded.

Specifically, the mandrel fixing seat is arranged on the outer side of the clamping unit located at the end part and comprises a fixing base and a side baffle, a positioning groove for supporting a workpiece is formed in the fixing base, a groove for clamping a mandrel end cap is formed in the inner side surface of the side plate, the positioning groove and the groove are communicated to form a positioning structure of the end cap end of the workpiece, and the positioning structure can prevent the mandrel from moving axially.

In order to effectively fix the end cap end of the workpiece, an extension plate is further arranged on a first movable base of the clamping unit positioned at the end part, and the mandrel fixing seat is arranged on an extension surface of the extension plate, so that the mandrel fixing seat is directly arranged on the nearest clamping unit end (the clamping unit positioned at the end part), and the mandrel fixing seat can synchronously act along with the clamping unit.

Specifically, heating mechanism includes second die clamping cylinder, upper and lower heating block, first lifting guide, first slider, the heating block is fixed to be set up down, go up the relative top that sets up heating block down of heating block, first lifting guide sets up in second die clamping cylinder, goes up the heating block and is connected with first slider, under second die clamping cylinder's drive first slider can be on first lifting guide the folding together or the separation of heating block under the oscilaltion action.

In order to prevent the heating block from scalding operators at the edge of the workbench, protective covers are arranged on the peripheries of the upper heating block and the lower heating block, and mesh plates with holes can be selected as the protective covers.

Specifically, stretching mechanism sets up on tensile guide rail, including servo motor, slip table, third die clamping cylinder, second lift guide, second slider, tensile clamping jaw, the slip table is installed on tensile guide rail, third die clamping cylinder fixes on the slip table, second lift guide fixes on third die clamping cylinder, second slider and second lift guide sliding fit, and tensile clamping jaw comprises upper and lower clamping jaw, and wherein the upper clamping jaw is connected with the second slider, under third die clamping cylinder's drive the second slider can make the oscilaltion action on second lift guide so that upper and lower clamping jaw presss from both sides tightly or unclamp, servo motor is connected to the slip table and can slide along tensile guide rail under servo motor's drive and realize tensile clamping jaw to the tensile of straight tube.

Preferably, the sliding table is provided with a positioning pushing block, and the positioning pushing block can push the straight pipe to a fixed position along with the axial movement of the sliding table along the straight pipe. When the workpiece is installed on the workbench, the straight pipe is reversely pushed from the stretching end through the positioning pushing block, so that the straight pipe is close to the end cap of the core rod rightwards, and the fixed end of the pipe is ensured to be positioned consistently.

Preferably, the side surface of the rack is provided with a placing table, and a placing frame is formed on the placing table; the edge of the workbench is provided with a storage groove, so that the workbench is convenient to clean.

Preferably, the workbench is provided with one or more straight pipe supports, and the straight pipe supports are uniformly provided with arc-shaped grooves for supporting straight pipes, so that the operating personnel can operate in order.

Compared with the prior art, the invention has the advantages that: the application provides a straight tube device of flare-outing can realize the quick reducing of nylon tube for the car, and the structure is exquisite, and reasonable in design has guaranteed the accurate high efficiency of reducing operation, can realize the batch production operation.

Drawings

FIG. 1 is a front view of a straight tube attenuation apparatus according to the present invention;

FIG. 2 is a side view of the straight tube attenuation apparatus of the present invention;

FIG. 3 is a cross-sectional view AA in FIG. 1;

FIG. 4 is a perspective view of the straight tube attenuation apparatus of the present invention;

FIG. 5 is a top view of the stretch heating tool;

fig. 6 is a partially enlarged view of the stretch heating tool of fig. 4.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

The embodiment relates to a straight tube fine drawing device, which comprises a rack, wherein a workbench is formed on the rack, a storage table 8 is arranged on the outer side of the rack around the workbench, a storage frame 9 is enclosed on the storage table 8, a protective baffle is arranged around the workbench, and an illuminating lamp is arranged at the top of the protective baffle and used for illuminating the workbench.

Taking a nylon straight pipe (hereinafter also referred to as a straight pipe) as an example, a mandrel is inserted into the straight pipe, an end cap is provided at an end of the mandrel, and an end face of the straight pipe abuts against the end cap to form a work 6.

The key component of the fine drawing equipment is a stretching heating tool installed on a workbench, the stretching heating tool comprises a fixed end, a clamping mechanism is used for fixing a workpiece 6, the heating mechanism is used for heating a to-be-stretched end of a straight pipe, the stretching mechanism is used for stretching a heating part of the straight pipe to reduce the diameter, the clamping mechanism and the stretching mechanism are respectively located at two ends of the heating mechanism and can be close to or far away from the heating mechanism respectively, and therefore the fine drawing equipment is suitable for fixing straight pipes with different lengths and stretching operation lengths.

The clamping mechanism is arranged on the stroke guide rail 3 and comprises two groups of clamping units and a mandrel fixing seat, the clamping units and the mandrel fixing seat are arranged at intervals along the stroke guide rail 3, and the mandrel fixing seat is fixed on the outer side clamping unit and used for fixing one end (fixed end) of the end cap of the workpiece 6. The clamping unit comprises a first movable base 10, the first movable base 10 is movably arranged on the stroke guide rail 3 and can slide along the stroke guide rail 3, and the extending direction of the stroke guide rail 3 is consistent with the length direction of the workpiece 6. The first movable base 10 is provided with a first clamping cylinder 17, and an upper clamping block and a lower clamping block (11, 11') which are oppositely arranged, wherein the lower clamping block is fixed on the first movable base 10, the upper clamping block is arranged on the first clamping cylinder 17, and the first clamping cylinder 17 drives the upper clamping block to perform lifting action relative to the lower clamping block so as to clamp and release the workpiece 6 by the upper clamping block and the lower clamping block.

If shown, the upper and lower clamping blocks (11, 11') are respectively provided with an upper and a lower semicircular grooves on the respective mating surfaces, the radian of the upper and lower semicircular grooves is matched with the arc of the workpiece 6, and the upper and lower semicircular grooves form a clamping passage of the workpiece 6 in the state that the upper and lower clamping blocks are folded, so that the surface contact is formed on the workpiece 6 to avoid scratching the surface of the workpiece 6.

Then, install a horizontal extension plate 14 on the first movable base of the clamping unit that the plug fixing base was located, the plug fixing base is installed promptly on the extension face of this horizontal extension plate 14, the plug fixing base includes unable adjustment base 16 and side fender 15, the constant head tank of support work piece 6 is seted up on unable adjustment base 16, set up the recess that is used for blocking the plug end cap on the medial surface of curb plate 15, thereby constant head tank and recess link up the location structure who constitutes work piece 6 stiff end together, this location structure can prevent plug axial displacement, ensure that tensile in-process plug does not take place relative slip.

The heating mechanism comprises a second clamping cylinder 18, an upper heating block (22 ') and a lower heating block (22') which are arranged oppositely, a first lifting guide rail 20 and a first sliding block 24, wherein the lower heating block is fixedly arranged, the first lifting guide rail 20 is arranged above the lower heating block, the upper heating block is connected with the first sliding block 24, and the first sliding block 24 can move up and down on the first lifting guide rail 20 to fold or separate the upper heating block and the lower heating block under the driving of the second clamping cylinder 18. For the convenience of assembly, the upper heating block is necessarily connected with the first sliding block 24 through a necessary connection structure, and the connection structure may include a necessary connection member and a connection block as long as the upper heating block is fixedly connected with the first sliding block 24.

In order to avoid the heating blocks from injuring operators beside the workbench, protective covers 7 are arranged on the peripheries of the upper and lower heating blocks (22, 22'). The protective cover 7 is a mesh plate with holes.

The stretching mechanism is arranged on a stretching guide rail and comprises a servo motor 1, a sliding table 3, a third clamping cylinder 19, a second lifting guide rail 21, a second sliding block 23 and a stretching clamping jaw, wherein the sliding table 3 is arranged on the stretching guide rail, the third clamping cylinder 19 is fixed on the sliding table 3, the second lifting guide rail 21 is fixed on the third clamping cylinder 19, the second sliding block 23 is in sliding fit with the second lifting guide rail 21, the stretching clamping jaw is composed of an upper clamping jaw and a lower clamping jaw (12 and 12 '), the upper clamping jaw is connected with the second sliding block 23, the second sliding block 23 can be driven by the third clamping cylinder 19 to lift up and down on the second lifting guide rail 21 so as to clamp or release the upper clamping jaw and the lower clamping jaw (12 and 12'), the sliding table 3 is connected with the servo motor 1 and can slide along the stretching guide rail 2 under the driving of the servo motor 1 so as to stretch the straight pipe by the stretching clamping jaw.

In addition, still be provided with the location on the slip table 3 and promote piece 5, the location promotes that piece 5 is relative with the tensile end of work piece 6, and the location promotes piece 5 can remove along with slip table 3, and when the initial stage was fixed with straight tube 6, the location promotes soon along the axial promotion straight tube of straight tube, makes the straight tube lean on tight plug end cap right, ensures that the pipe stiff end location is unanimous.

The fine drawing process based on the straight pipe fine drawing device comprises the following steps:

after starting up, the equipment automatically starts a heating block to heat to a set temperature, the corresponding heating temperature of the nylon pipe is 158 ℃, and the actual heating tolerance is controlled to be +/-10 ℃; when the temperature reaches the set temperature, the equipment generates a reminding signal, and then the operation is started: the core rod is inserted into the nylon straight pipe to ensure that the end face of the straight pipe is abutted against the end cap of the core rod, then the assembled workpiece 6 is placed on the core rod fixing seat, the action sequence of the equipment is as follows,

the servo motor 1 is started to drive the sliding table 3 to slide towards the fixed end of the workpiece 6, the positioning pushing block 5 gradually approaches the workpiece 6, contacts the workpiece 6 and pushes the workpiece 6 to enable the fixed end of the workpiece 6 to be positioned in place on the mandrel fixing seat, and the servo motor 1 is suspended;

at the moment, the first clamping cylinder 17, the second clamping cylinder 18 and the third clamping cylinder 19 are started, the upper and lower clamping blocks, the upper and lower heating blocks and the stretching clamping jaw are enabled to be tightly clamped by heating, the upper and lower heating blocks are released after heating for 7-20s, at the moment, the servo motor 1 is started again to drive the stretching clamping jaw to stretch the straight pipe, the stretching speed and the stretching length are set according to the product requirements, the general stretching speed is 30-80mm/s, and the stretching distance is 20-30 mm;

after the stretching is finished, cooling the workpiece 6 for 3-7s at room temperature;

and loosening the stretching clamping jaw, fixing the upper and lower blocks, taking out the workpiece 6, and drawing out the core rod from the straight pipe to obtain the diameter-variable straight pipe.

In addition to the above embodiments, the present invention also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of the claims of the present invention.

Claims

1. A straight pipe fine drawing device is characterized in that: the device comprises a rack, wherein a workbench is arranged on the rack, a stretching heating tool is arranged on the workbench and comprises a clamping mechanism for fixing the fixed end of a straight pipe, a heating mechanism for heating the end to be stretched of the straight pipe, a stretching mechanism for stretching the heated part of the straight pipe to reduce the diameter, and the clamping mechanism and the stretching mechanism are respectively positioned at two ends of the heating mechanism and can be respectively close to or far away from the heating mechanism;

a core rod penetrates through the straight pipe, an end cap is arranged at the end part of the core rod, the end face of the straight pipe is abutted against the end cap to form a workpiece, the end cap end of the workpiece is a fixed end, and the other end of the workpiece is a stretching end;

the heating mechanism comprises a second clamping cylinder, an upper heating block, a lower heating block, a first lifting guide rail and a first sliding block, the lower heating block is fixedly arranged, the upper heating block is oppositely arranged above the lower heating block, the first lifting guide rail is arranged on the second clamping cylinder, the upper heating block is connected with the first sliding block, and the first sliding block can perform up-and-down lifting action on the first lifting guide rail under the driving of the second clamping cylinder to fold or separate the upper heating block and the lower heating block;

the clamping mechanism is arranged on the stroke guide rail and comprises more than two groups of clamping units and mandrel fixing seats, the clamping units and the mandrel fixing seats are arranged at intervals along the stroke guide rail, and the mandrel fixing seats are positioned on the outermost sides and used for fixing the fixed ends of the workpieces; any clamping unit comprises a first movable base, the first movable base is movably arranged on the stroke guide rail and can slide along the stroke guide rail, a first clamping cylinder, an upper clamping block and a lower clamping block which are oppositely arranged are arranged on the first movable base, the lower clamping block is fixed on the first movable base, the upper clamping block is arranged on the first clamping cylinder, and the first clamping cylinder drives the upper clamping block to lift relative to the lower clamping block to clamp or release a workpiece by the upper and lower clamping blocks; the mandrel fixing seat is arranged on the outer side of the clamping unit positioned at the end part and comprises a fixing base and a side baffle, the fixing base is provided with a positioning groove for supporting a workpiece, the inner side surface of the side baffle is provided with a groove for clamping a mandrel end cap, the positioning groove and the groove are communicated to form a positioning structure of the workpiece fixing end, and the positioning structure can prevent the mandrel from moving axially;

an extension plate is arranged on a first movable base of the clamping unit positioned at the end part, and the mandrel fixing seat is arranged on the extension surface of the extension plate;

the stretching mechanism is arranged on the stretching guide rail and comprises a servo motor, a sliding table, a third clamping cylinder, a second lifting guide rail, a second sliding block and a stretching clamping jaw, wherein the sliding table is arranged on the stretching guide rail; the straight pipe fixing device is characterized in that a positioning pushing block is arranged on the sliding table and can push the straight pipe to a fixed position along with the axial movement of the sliding table along the straight pipe.

2. The straight tube attenuation apparatus according to claim 1, characterized in that: the upper clamping block and the lower clamping block are respectively provided with an upper semicircular groove and a lower semicircular groove on respective mating surfaces, and the upper semicircular groove and the lower semicircular groove form a clamping channel of a workpiece under the state that the upper clamping block and the lower clamping block are folded.

3. The straight tube attenuation apparatus according to claim 1, characterized in that: and protective covers are arranged on the peripheries of the upper heating block and the lower heating block.

4. The straight tube attenuation apparatus according to claim 1, characterized in that: the side surface of the rack is provided with a placing table, and a placing frame is formed on the placing table; and a storage groove is formed in the edge of the workbench.

5. The straight tube attenuation apparatus according to claim 1, characterized in that: the workbench is provided with one or more straight pipe supports, and the straight pipe supports are uniformly provided with arc-shaped grooves for supporting straight pipes.