CN110682546A

CN110682546A - PE electric smelting pipe fitting copper post foot spinning head

Info

Publication number: CN110682546A
Application number: CN201910895502.8A
Authority: CN
Inventors: 王爽; 胡博; 吴俊�
Original assignee: Hangzhou Zhisong Intelligent Technology Co Ltd
Current assignee: Hangzhou Zhisong Intelligent Technology Co Ltd
Priority date: 2019-09-21
Filing date: 2019-09-21
Publication date: 2020-01-14

Abstract

The invention belongs to the technical field of electric smelting pipe fitting processing, and discloses a rotary pressing head for a copper column leg of a PE electric smelting pipe fitting, which comprises a collet chuck for clamping the copper column leg, a top pressing rod arranged in the collet chuck and movable along the axial direction relative to the collet chuck, and a clamping groove pipe barrel sleeved on the outer side of the collet chuck, wherein the lower end of the clamping groove pipe barrel is provided with a clamping groove for capturing a resistance wire, and the lower end of the clamping groove is provided with an; the outer diameter of at least the lower end part of the clamping groove pipe barrel is smaller than the inner diameter of a copper column pin retainer of the PE electric melting pipe fitting. The invention realizes the organic integration of clamping, rotating and pressing and pushing functions in a small space of the copper column pin guard ring of the PE electric melting pipe fitting under the external driving coordination by a mechanical combined structure, and can achieve the purpose of completing the reliable connection of the copper column pin and the resistance wire by one-time spinning in the wire distribution processing of the PE electric melting pipe fitting.

Description

PE electric smelting pipe fitting copper post foot spinning head

Technical Field

The invention belongs to the technical field of electric melting pipe fitting processing, relates to a copper column base crimping technology of an electric melting pipe fitting adopting a post wire laying process, and particularly relates to tool equipment for crimping a copper column base.

Background

A high-density Polyethylene (PE) electric melting pipe fitting is a pipe connecting piece with a resistance wire for electric heating welding embedded inside. The production process generally comprises two resistance wire embedding processes of front wire distribution and rear wire distribution, wherein the front wire distribution is to embed the resistance wires connected with two connecting copper column feet into a mold in advance and then to perform injection molding; the back wire laying is to cut a groove on the inner wall of the injection molded pipe fitting, press and embed a copper wire in the groove, and then press and connect two copper column feet of the resistance wire on the external connection port. The prior wire laying process has high-efficiency automatic equipment, but the equipment investment is large at one time due to the integration of a plurality of processes, the equipment reliability and the material consumption are high, and the application and popularization of the wire laying process are limited to a certain extent. The back cloth silk technology has fine flexibility in the aspect of conventional equipment and frock resource utilization, still adopts for most of manufacturing enterprises at present, but copper post foot crimping wherein is manual operation completion, has inevitably brought cost of labor, a series of problems such as production efficiency and quality stability, and contact failure between resistance wire and the copper post foot is also not uncommon. The production efficiency and the quality stability of the post-filament distribution process are improved, and the post-filament distribution process has obvious practical production requirements. The manual compression joint of the copper column feet in the post wire distribution process, whether the sleeve gasket is connected with the resistance wire or the manual wire winding compression joint, obviously influences the efficiency due to the increase of the working procedures, and is difficult to ensure the quality stability of each compression joint; whether the resistance wire is reliably connected with the copper column pin or not can be judged only in the resistance value detection of the back-end independent layout.

Resistance wires in the PE electric melting pipe fittings are small in resistance value, large current needs to be introduced to heat and weld PE materials on the surfaces of the butt joint pipes, a large contact surface and small contact resistance need to be arranged between the resistance wires and copper column feet, and the existing manual compression joint of the copper column feet is provided with additional connecting gaskets, resistance wire multi-circle winding foot compression joint modes and the like. The core technical problem to be solved is to simulate manual work to wind a resistance wire on a copper column base and press the copper column base into a PE pipe fitting fixing hole. Because the internal diameter of the copper column base protective shroud of PE electric smelting pipe fitting is injectd only about 10mm, will realize simultaneously in such little space that the resistance wire catches a series of actions such as fixed, copper column base centre gripping is fixed, the resistance wire convolutes copper column base root, the whole PE pipe fitting joint hole of impressing of copper column base, have higher realization complexity.

Disclosure of Invention

The invention aims to design a spinning head special for crimping a copper column base aiming at the technical current situation, and the spinning head can realize the functions of clamping the copper column base, clamping a resistance wire, winding, crimping the copper column base and the like. The purpose of this patent spinning head structural design is that realize functions such as copper column base centre gripping, resistance wire centre gripping and wire winding, copper column base crimping simultaneously in less space, under equipment system supports, can realize the automated inspection of connecting resistance value in step. The spinning head is a core component in automatic equipment for the PE pipe fitting rear wire distribution process.

Aiming at the purposes, the technical scheme adopted by the invention is as follows:

the utility model provides a PE electric smelting pipe fitting copper post foot spinning head, includes:

the collet chuck is used for clamping a copper column base and has a hollow tubular structure, and the lower end of the collet chuck is a copper column base clamping end;

the jacking rod is arranged in the collet chuck, is coaxial with the collet chuck, is provided with a telescopic driving mechanism, and is driven by the telescopic driving mechanism to move axially relative to the collet chuck;

the clamping groove pipe barrel is sleeved outside the collet chuck, has the same axis with the collet chuck, is provided with a rotary driving mechanism, and rotates around the axis of the collet chuck under the driving of the rotary driving mechanism; the lower end of the clamping groove pipe barrel is provided with a clamping groove for capturing the resistance wire, and the lower end of the clamping groove is opened;

the outer diameter of at least the lower end part of the clamping groove pipe barrel is smaller than the inner diameter of a copper column pin retainer (wiring retainer) of the PE electric melting pipe fitting.

When the spinning head is used for crimping the cylinder leg of the resistance wire on the PE electric melting pipe fitting, firstly, the copper cylinder leg is inserted into the collet from the lower end, the lower end embedding section of the copper cylinder leg is exposed out of the collet, the lower end of the copper cylinder leg is aligned with the copper cylinder leg crimping hole in the copper cylinder leg guard ring of the PE electric melting pipe fitting, the spinning head is driven to integrally extend into the copper cylinder leg guard ring of the PE electric melting pipe fitting downwards to the lower end of the copper cylinder leg, the lower end of the copper cylinder leg is close to or slightly enters the copper cylinder leg crimping hole, and the resistance wire which penetrates out of the copper cylinder leg crimping hole is extruded by the clamping groove cylinder barrel and deviates to one side of the. Then, the rotary driving mechanism drives the clamping groove pipe barrel to rotate, when an opening at the lower end of the clamping groove on the clamping groove pipe barrel passes through the resistance wire, the resistance wire enters the clamping groove under the elastic action and is wound on the embedded section at the lower end of the copper column pin along with the rotation of the clamping groove pipe barrel; and finally, the top pressure rod is driven by the telescopic driving mechanism to press the embedded section of the copper column foot into the copper column foot pressing hole downwards in the collet chuck, so that the pressing connection of the copper column foot is completed.

Preferably, the inner diameter of the lower part of the collet is slightly smaller than the outer diameter of the copper column foot; four equally-divided axial cutting seams are arranged on the pipe wall of the lower part, the pipe wall is divided into four arc-shaped clamping sheets by the four cutting seams, and a copper column foot entering the clamping cylinder can be reliably clamped by the elasticity of the clamping sheets.

Preferably, the locking groove of the locking groove tube is h-shaped.

Preferably, the slot tube is installed at the lower end of an outer sleeve, a driven gear is installed on the outer sleeve, a driving gear meshed with the driven gear is arranged on the side face of the driven gear, a motor for driving the driving gear to rotate is arranged on the driving gear, and the motor, the driving gear and the driven gear form the rotation driving mechanism. The clamping groove pipe barrel is preferably in threaded connection, so that the loss replacement is convenient.

The outer sleeve is arranged on the outer side of the collet chuck, the copper inner sleeve is arranged between the outer sleeve and the collet chuck, the inner sleeve is fixed relative to the outer sleeve, and the inner surface of the inner sleeve is in sliding fit with the outer surface of the collet chuck.

Further, the outer sleeve has a movable range in the axial direction of the collet relative to the collet. A compression spring is arranged between the outer sleeve and the collet chuck, the upper end of the spring is fixed relative to the collet chuck, and the lower end of the spring is fixed relative to the outer sleeve. When the clamping groove pipe barrel is not pressed, the spring keeps the outer sleeve at the descending limit position of the movable range.

Furthermore, an insulating layer is arranged between the outer sleeve and the inner sleeve, and the jacking rod, the collet and the rack are electrically isolated. The top pressure rod is electrically isolated from the equipment rack when the copper column base is pressed, so that the top pressure rod can be used as a resistance measuring probe when the spinning head works.

Preferably, the telescopic driving mechanism configured for the top press rod is a cylinder device.

The invention has the beneficial effects that: with a mechanical composition structure, under the outside drive cooperation, connect the installation to PE electric smelting pipe fitting copper column foot and resistance wire, realized centre gripping, rotation, the organic integration of pressure push function in such little space of PE electric smelting pipe fitting copper column foot protective shroud, can reach in the cloth silk processing behind the PE electric smelting pipe fitting that once spinning accomplishes the reliable connection of copper column foot and resistance wire. The spinning head combined structural member is a core component for automatic modification of wire distribution after PE electric melting pipe fittings, and the spinning head is applied to automatic equipment, so that the production efficiency can be remarkably improved compared with manual compression joint of a copper column base. The spinning head can also be expanded into a probe for measuring resistance of a resistance wire in the PE electric melting pipe fitting, and the spinning head is rich in functions, practical and convenient.

Drawings

Fig. 1 is a schematic view of the overall structure of the spinning head of the present invention.

Fig. 2 is a cross-sectional view of the spinning head D-D shown in fig. 1.

Fig. 3 is a schematic sectional view of the collet.

Fig. 4 is a schematic perspective view of the collet.

Fig. 5 is a schematic diagram of the structure of the jacket for installing the clamping groove pipe barrel of the spinning head.

Fig. 6 is a schematic plan view of the locking groove tube according to the present invention.

Fig. 7 is a cross-sectional view of fig. 6.

Fig. 8 is an exploded view of the assembly structure of the components of the spinning head of the present invention.

Fig. 9 is a schematic view showing a state in which a copper stud is fitted in the spinning head of the present invention.

Fig. 10 is a schematic view of crimping a copper stud stub using the spinning head of the present invention.

Detailed Description

The structural principle of the spinning head for the copper column base of the PE electric melting pipe fitting is further explained with reference to the attached drawings.

Referring to fig. 1-2, the spinning head structure of the copper column base of the PE electric melting pipe fitting of the present invention includes a top pressure bar 3, a collet 4, an inner sleeve 5, an outer sleeve 6, a slot tube barrel 10, a driven gear 7, a driving gear 11, and a spring 8. The top pressure rod is arranged in the collet chuck, and the initial position of the ejector rod determines that the ejector rod has a certain downward moving stroke; the jacking rod 3 is connected to a pushing rod of an external cylinder serving as a telescopic driving mechanism, and the jacking rod 3 in the clamping barrel 4 is driven by the cylinder to jack and insert the copper column foot into the crimping hole after the resistance wire at the bottom of the copper column foot is wound. A bayonet tube 10 is mounted to the lower end of the housing. The outer sleeve 6 is sleeved outside the collet chuck, an inner sleeve 5 is arranged between the upper part of the outer sleeve and the collet chuck, and the collet chuck has a certain telescopic moving stroke range in the inner sleeve 5. A spring 8 is arranged between the lower part of the outer sleeve and the collet chuck, and the collet chuck can be boosted to reset upwards after the downward movement of the collet chuck 4 is finished. The inner sleeve 5 and the outer sleeve 6 are arranged in a tight fit mode, and the driven gear 7 is arranged on the outer side of the outer sleeve 6 in a tight fit mode. During assembly, the inner sleeve 5 is tightly assembled into the outer sleeve 6, and then can be inserted into the driven gear 7 in a tight fit manner and is tightly pressed and fixed by a screw assembled in the tightly pressed threaded hole 1 on the driven gear 7. The drive gear 11 meshes with the driven gear 7. The tooth thickness of the driving gear is larger than that of the driven gear, and when the slot tube barrel, the outer sleeve and the driven gear which are mutually fixed move up and down relative to the collet chuck, the driving gear 11 and the driven gear 7 are always meshed. When the inner sleeve 5, the outer sleeve 6 and the driven gear 7 are driven by the motor to rotate, the collet chuck 4 arranged in the jacking rod 3 is axially and relatively static.

The top pressure rod 3 and the collet chuck 4 can be connected with conducting wires outwards for measuring the resistance of the resistance wires.

As an alternative to the mounting structure of the bayonet tube, the copper sleeve 5 and the outer sleeve 6 may also be integrated. The electric isolation between the collet and the rack can be realized by arranging the driven gear and the outer sleeve in an insulating assembly way.

Referring to fig. 3-4, the outer diameter of the upper half part of the collet 4 is larger than that of the lower half part, and the collet is of a structure with a thick upper part and a thin lower part, on one hand, the larger upper half part of the structure facilitates the installation and fixation of the collet, the installation strength of the collet is guaranteed, and the smaller lower half part of the diameter enables the collet to reserve a radial space for the clamping groove pipe barrel, so that the arrangement of the clamping groove pipe barrel with the outer diameter limited by the copper pin guard ring is realized. On the other hand, a step is formed on the outside of the collet, which step is just for supporting the upper end of the spring 8.

The collet 4 is hollow, and the inner diameter of the lower half part of the collet is slightly smaller than the outer diameter of the copper column pin; the pipe wall of the lower half part is provided with four equally-distributed axial cutting seams, and the copper column foot entering the clamping barrel 4 can be reliably clamped by the elasticity of the clamping barrel.

As an alternative to the copper column base clamping, an elastic ball clamping manner may be adopted in the clamping cylinder 4, and the copper column base is clamped by balls embedded in the hollow tube wall and pushing the balls embedded in the tube wall inwards by an external fixed elastic ring. At this time, the inner diameter of the clamping cylinder 4 is in loose fit with the copper column base,

referring to fig. 5 to 9, the outer casing 6 is not of a straight cylindrical structure, but is provided with a bottom portion, the inner side plane of which is used for supporting the lower end of the spring 8. The middle of the bottom of the tube body is provided with a clamping groove tube barrel mounting hole with internal threads. An inner sleeve positioning step is arranged on the upper part of the inner cavity of the outer sleeve 6. The clamping groove pipe barrel 10 is of an upper section and a lower section, the upper section is used for being connected with the outer sleeve 6, and the lower section is used for shifting the resistance wire. The upper end of the clamping groove pipe barrel 10 is provided with external threads matched with the internal threads of the mounting hole of the clamping groove pipe barrel, and the clamping groove pipe barrel 10 with the external threads is screwed and fixed at the lower end of the outer sleeve 6. Four axial clamping grooves are uniformly arranged on the pipe wall of the lower-end pipe orifice in the circumferential direction, the opening ends of the clamping grooves are wider, and the whole pipe orifice is h-shaped.

The clamping groove 2 on the clamping groove pipe barrel 10 is used for capturing the resistance wire in the integral rotation of the outer sleeve 6; when the clamping groove pipe barrel rotates, because the pipe orifice of the clamping groove pipe barrel 10 is pressed on the electric group wire, when the opening of the clamping groove passes through the resistance wire, the resistance wire is hung in the clamping groove and is stirred by the clamping groove under the action of the metal elasticity of the resistance wire. The clamping groove pipe barrel 10 can stir a resistance wire in the PE electric melting pipe captured by the clamping groove in rotation, and the bottom of the copper column leg is surrounded.

The spinning head spinning action implementation process comprises the following steps:

delivering and loading the copper column foot 9 into a collet chuck of a spinning head, so that a circular truncated cone of the copper column foot 9 is tightly attached to the bottom of a clamping groove pipe barrel, firstly, the clamping groove pipe barrel of the spinning head partially extends into a wiring guard ring 12 of the PE pipe fitting, and the lower end of the copper column foot is enabled to be pressed on the edge of a compression joint hole of the PE pipe fitting with certain pressure, and a resistance wire is just fixed and pressed; then, a motor drives the gear and drives the jacket provided with the clamping groove pipe barrel to integrally rotate, so that the resistance wire is wound in multiple circles at the pressing-in section of the copper column pin; thirdly, the resistance wire is rotated to keep the surrounding state, and the jacking rod is pressed down to the copper column base to be in place. After all the actions are finished, the top pressure rod retracts upwards. The action that the tube barrel part of the spinning head clamping groove extends into the PE tube fitting wiring retainer can be realized by a motor screw rod or an air cylinder, and the copper column foot is completely pressed into the PE tube fitting after being wound by wires and can be realized by the driving of the air cylinder; the spring plays an adjusting role in the height position matching of the driven gear and the driving gear.

Claims

1. The utility model provides a PE electric smelting pipe fitting copper post foot spinning head, includes:

the collet chuck (4) is used for clamping a copper column base and has a hollow tubular structure, and the lower end of the collet chuck is a copper column base clamping end;

the jacking rod (3) is arranged in the collet chuck, is coaxial with the collet chuck, is provided with a telescopic driving mechanism, and is driven by the telescopic driving mechanism to move axially relative to the collet chuck;

the clamping groove pipe barrel (10) is sleeved on the outer side of the collet chuck, is coaxial with the collet chuck, is provided with a rotary driving mechanism, and is driven by the rotary driving mechanism to rotate around the axis of the collet chuck; the lower end of the clamping groove pipe barrel is provided with a clamping groove (2) for capturing the resistance wire, and the lower end of the clamping groove is opened;

the outer diameter of at least the lower end part of the clamping groove pipe barrel (10) is smaller than the inner diameter of a copper column pin retainer of the PE electric melting pipe fitting.

2. The PE electrofusion tube copper stub spinning head as claimed in claim 1, wherein the inside diameter of the lower portion of the collet is slightly smaller than the outside diameter of the copper stub; four equally-divided axial cutting seams are arranged on the pipe wall of the lower part, and the pipe wall is divided into four arc-shaped clamping sheets for clamping the copper column base by the four cutting seams.

3. The spinning head for the copper column leg of the PE electric smelting pipe fitting according to claim 1, wherein the neck of the neck tube barrel is h-shaped.

4. A spinning head for copper column legs of PE electrofusion pipe fittings according to claim 1, characterised in that the bayonet tube (10) is mounted at the lower end of an outer sleeve (6) placed over the outside of the collet, and that the outer sleeve is fitted with a driven gear (7) with a driving gear (11) engaging with it on the side, preferably in a threaded connection.

5. The spinning head for the copper column legs of the PE electric smelting pipe fittings according to claim 4, characterized in that a copper inner sleeve (5) is arranged between the outer sleeve (6) and the collet chuck (4), the inner sleeve (5) is fixed relative to the outer sleeve, and the inner surface of the inner sleeve is in sliding fit with the outer surface of the collet chuck.

6. A rotary indenter for copper pin of PE electrofusion pipe fittings according to claim 4, characterized in that the outer sleeve has a range of movement in the axial direction of the collet chuck relative to the collet chuck, and that a compression spring (8) is arranged between the outer sleeve (6) and the collet chuck (4), the upper end of the spring being fixed relative to the collet chuck and the lower end being fixed relative to the outer sleeve, the spring maintaining the outer sleeve in the downward limit position of the range of movement when the bayonet socket is not pressed.

7. The spinning head for the copper column legs of the PE electric melting pipe fittings according to claim 4, wherein an insulating layer is arranged between the outer sleeve (6) and the inner sleeve (5), and the jacking rod and the collet chuck are electrically isolated from the rack.

8. The spinning head for the copper column legs of the PE electric smelting pipe fittings according to claim 1, wherein the telescopic driving mechanism configured for the top press rod is a cylinder device.