CN2367449Y

CN2367449Y - Simple plastic mould for three-dimensionally bending pipe

Info

Publication number: CN2367449Y
Application number: CN 99200237
Authority: CN
Inventors: 曾绍谦
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-01-08
Filing date: 1999-01-08
Publication date: 2000-03-08
Anticipated expiration: 2009-01-08

Abstract

The utility model relates to a simple plastic mould for three-dimensionally bending pipe, which is composed of at least two branches of spring end groups assembled and snap-fastened between arc-shaped reeds, wherein, a screw die is assembled by at least two arc-shaped reeds. One end of the reed is equipped with a through hole which is provided with a spring end, and the other end of the reed is equipped with a lock joint slot which is symmetrical, open to public and is located into another branch of the spring ends. Every screw die staggers with each other to constitute a screw type plastic die body device. The plastic die is sheathed on a straight pipe casting waiting to be bent, and the pipe casting and its peripheral plastic mould can be together carried out three-dimensional bending processing by a pipe bender, so that the pipe wall strength of bending can be reinforced, and the cave-in deformation of the pipe wall can be prevented for the convenience of mold release.

Description

Plain type three-dimensional bending tube plastic mould

The plain type three-dimensional bending tube plastic mould that the utility model provides, for at the application improvement technical application that No. 98200326.9 patent proposed, and supply with some flexible and relatively poor path, the thin-wall metal pipes of rigidity, add sheathed use in man-hour utilizing angle pipe equipment to carry out three-dimensional bending tube (or claim curved forge), decapacitation disperses tube wall stress to suffer beyond the distortion that stress concentrates to prevent tube wall when bend pipe is processed, and still has the convenience of plastic mould on the bend pipe after the machine-shaping of simple and easy removal three-dimensional bending tube.

Promptly disclose in No. 98200326.9 patented technology of previous application: utilize the effectively principle of dissipation of ferees of helical spring, special amplification utilizes most spiral reeds to form the movable plastic mould of this spiral spring type, protecting mould for the tube wall skin of straight shape pipe fitting when bending forging machining 3 D bend pipe uses, has the moment of flexure active force that disperses between tube wall, the effect of avoiding stress concentrations takes place and tube wall being caused collapse-deformation, and in bend pipe processing back example in the demoulding, promote to pipe fitting implement three-dimensional modeling bend operation the time easy benefit etc.

But still there is the part that has much room for improvement in the dismounting operation technique of the plastic mould that this case disclosed, promptly be one after utilizing angle pipe equipment the pipe fitting that is arranged with plastic mould to be carried out three-dimensional is curved to forge processing, comparatively inconvenience in the time of will be with the plastic mould removal of three-dimensional bending tube finished product periphery, when particularly the crooked arc angle of bend pipe finished product is less or the amplitude that changes of three-dimensional twisted bending is when complicated, all be easier to be difficult to the problem of plastic mould on the removal three-dimensional bending tube finished product.Investigate the technical disadvantages of this problem, mainly occur in wearing in the group structure of the reed both-end and the spring tip, because the both-end of reed all is provided with corresponding through hole, so that wear the group spring tip, and interleaved set is dressed up the screw type plastic mould; After problem just occurs in three-dimensional bending tube processing, when at least one end spring tip in will together that three-dimensional is curved plastic mould takes out, must be from the beginning to the end in each through hole of this end of plastic mould pull take out this spring tip, be somebody's turn to do each through hole of end this moment, produce three-dimensional offset variation because of flecition already, will be from wherein taking out the spring tip, though be not impossible, but must apply great pull active force, with the frictional resistance that between the through hole hole wall that overcomes each 3-D migration the spring tip is applied, particularly the side-play amount between each through hole adds man-hour along with the dwindling of the rate of curving of three-dimensional bending tube, pull to take out the interior spring tip of plastic mould one end through hole, and will seem is not easy.

Based on above-mentioned factor, make bend pipe be implemented utilization more easily with plastic mould, must add the design of the plastic mould that improves removal bend pipe finished product periphery, curved back again, so that bend the technology barrier of three-dimensional path, thin-wall metal (or nonferrous alloy) bend pipe in the solution industry completely, and can simple and easyly be implemented.So;

The purpose of this utility model promptly is at after using plastic mould pipe fitting to be carried out three-dimensional bending tube processing, can be from the plastic mould of three-dimensional bending typing, and easy single the spring tip at least that takes out is to reach the convenience of the plastic mould that improves removal bend pipe finished product periphery.

The purpose of this utility model is finished like this:

A kind of plain type three-dimensional bending tube plastic mould, comprise and wear group and at least two or two above spring tips of clinching between the arcuation reed, the both-end of reed is shaped on the overlap joint groove of symmetry, be shaped on corresponding through hole in the one end overlap joint groove and wear the group spring tip, and can utilize at least two reeds and the spring tip to wear the spiral mould circle of forming a unit, can interlacedly be combined into the plastic mould of a movable helical spring form between each spiral mould circle, each spring tip both-end is shaped on annular groove, is embedded with the clasp that each spiral mould circle of restriction serial connection gets loose and it is characterized by on annular groove:

At least must there be an end to offer snap groove in the overlap joint groove of each reed both-end, snap groove has the bottom land of circle mouthful shape and the groove neck of reducing shape, and the opening of snap groove is open towards the outer wall of spiral mould circle, can enter in the snap groove from the opening part slide fastener spring tip, and clinching makes the appropriate interior tandem arrangement constituent parts spiral mould circle of bottom land that places of the spring tip through the groove neck.The purpose of this utility model can also further be finished by following technical measures:

Aforesaid plain type three-dimensional bending tube plastic mould, piece together in the plastic mould of forming by constituent parts spiral mould circle is staggered, at least must have the above snapping passage that forms by snap groove institute Series Code in a place or a place, in order to the button group or make things convenient at least one branch of removal or the spring tip more than.

Aforesaid plain type three-dimensional bending tube plastic mould, snap groove also can be opened on the overlap joint groove of each reed both-end, detain the group spring tip to replace the through hole of offering at least one end overlap joint groove.

Below in conjunction with Figure of description and embodiment, the utility model is further described.

The accompanying drawing simple declaration:

Fig. 1 is a three-dimensional exploded view of the present utility model;

Fig. 2 becomes the schematic diagram of unit helical coils for the utility model utilizes spring tip assembling reed;

Fig. 3 is for offering the enlarged diagram of snap groove on the reed of the present utility model;

Fig. 4 tears the enlarged diagram of the group spring tip open for the utility model utilizes snap groove;

Fig. 5 becomes another schematic diagram of unit helical coils for the utility model utilizes spring tip assembling reed;

User mode figure when Fig. 6 utilizes bending machine to carry out the bend pipe forging for the utility model;

Fig. 7 carries out the three-dimensional curved schematic perspective view of forging the peripheral plastic mould of back removal bend pipe for the utility model.

The figure number explanation:

Reed 1,2,20 spiral mould circles 10

Overlap

joint groove

11,21 through holes 12

Snap groove 23 bottom lands 24

Opening 25 groove necks 26

Snapping passage 27

The

spring tip

3,4,40

clasps

31,41 and 43

Annular groove

32,42,44 pipe fittings 5

Bend pipe 50 bending machines 6

Bending seat 61 clamping plate 62

Swing arm wheel 63 bending bars 64

First see shown in Figure 1ly, the plain type three-dimensional bending tube plastic mould that the utility model provides is to utilize

arcuation reed

1 and 2 to wear to organize and at least two or two the above spring tips 3 of clinching and 4 compositions; Wherein can utilize at least two

arcuation reeds

1 and 2 assembly groups to form the spiral mould circle 10 (cooperating shown in Figure 2) of a unit;

At least two

reeds

1 and 2 both-ends on the spiral mould circle 10 of per unit, all be provided with the

overlap joint groove

11 and 21 of symmetry, wherein be shaped on corresponding through hole 12 in the overlap joint groove 11 of at least one end, must offer snap groove 23 (as shown in Figures 1 and 2) again on other overlap joint grooves 21 of holding in addition; The bottom land 24 of this snap groove 23 is for making a circle mouthful shape (as shown in Figure 3), enters the spring tip 4 (as shown in Figure 4) in the groove in order to be installed with by clinching; The opening 25 of snap groove 23 is towards the outer wall of spiral mould circle 10 open (as shown in Figure 3), can buckle into interior or pulls button and transfer to plastic mould outer (as shown in Figure 4) in snap groove 23 from the plastic mould external pressure in order to the spring tip 4, and not influence the pipe fitting 5 of accepting to bend forging plastic mould in; Make the groove neck 26 (as shown in Figure 3) of reducing shape on the snap groove 23 with the handing-over position of its circle mouth shape bottom land 24, enter in the snap groove 23 in order to the spring tip 4 sliding sleeves after, can by clinching by groove neck 26 appropriate placing in the circle mouthful shape bottom land 24 (as shown in Figure 4).

In fact, the snap groove 23 that the above-mentioned enforcement of the utility model is offered, also can be opened on the

overlap joint groove

11 and 21 of each

reed

1 and 2 both-ends, to replace the through hole of offering at least one end overlap joint groove 11 12, and per unit spiral mould circle 10 can be by (but minimum must have two) reed phase composition more than two, as with three (or more than three)

reeds

1,2,20 enclose 10 (as shown in Figure 5) of unit spiral mould circle that group forms, it has minimum two

spring tips

4 and 40 can be for carry out the running that group is torn in clinching open in snap groove 23, particularly after pipe processing, when formation has the form of three-dimensional bending complexity, for improving the convenience of mould unloading, normally on per unit spiral mould circle 10, use more reed and the distribute more snap groove 23 and the spring tip 40, be beneficial to the plastic mould on the removal complex three-dimensional bend pipe curvature.

Certainly the arc curvature and the quantity thereof of employed arc spring leaf when above-mentioned assembly group per unit spiral mould circle 10, must form a spiral proper circle (state as shown in Figure 5) to center on, and the constituent parts spiral mould circle 10 assembly group of interlocking continuously forms movable spiral spring type plasticity die body, is its most important condition.

Both-end in above-mentioned each

spring tip

3,4 and 40 is shaped on

annular groove

32,42 and 44, so that be embedded

clasp

31,41 and 43 on annular groove, gets loose to limit each

reed

1 and 2; By this, composition one can be furnished the spiral circle ring-type plasticity die body (as shown in Figure 1) of straight shape pipe fitting 5 to be curved in inside.

To desire to bend on the straight shape pipe fitting of forging 5, behind the sheathed plastic mould of the present utility model, its integral body can be put on the bending seat 61 of bending machine 6, make 64 pairs of plastic moulds of bending bar that utilize on clamping plate 62 and the swing arm wheel 63 and the pipe fitting 5 that contains thereof, carry out the shuttle-type bending processing of the mechanical arm of force, impel plastic mould and the pipe fitting 5 that contains can together be bent into moulding bend pipe 50 forms (as shown in Figure 6) of the axial moulding of required three-dimensional arbitrarily.

Through the plastic mould on the three-dimensional curved moulding bend pipe of forging after processing 50, comprise each

reed

1 and 2 and the

spring tip

3 and 4, by the tube wall periphery of holding at moulding bend pipe 50, this moment, the spring tips 4 that respectively enclose in the snapping passage 27 that snap groove 23 pieces together to form are located at least one branch on this plastic mould or above clinching are transferred to external worlds' (as shown in Figure 7), with the purpose of the plasticity die body on the Da Jianyi removal moulding bend pipe 50

Claims

1, a kind of plain type three-dimensional bending tube plastic mould, comprise and wear group and at least two or two above spring tips of clinching between the arcuation reed, the both-end of reed is shaped on the overlap joint groove of symmetry, be shaped on corresponding through hole in the one end overlap joint groove and wear the group spring tip, and can utilize at least two reeds and the spring tip to wear the spiral mould circle of forming a unit, can interlacedly be combined into the plastic mould of a movable helical spring form between each spiral mould circle, each spring tip both-end is shaped on annular groove, is embedded with the clasp that each spiral mould circle of restriction serial connection gets loose and it is characterized by on annular groove:

At least must there be an end to offer snap groove in the overlap joint groove of each reed both-end, snap groove has the bottom land of circle mouthful shape and the groove neck of reducing shape, and the opening of snap groove is open towards the outer wall of spiral mould circle, can enter in the snap groove from the opening part slide fastener spring tip, and clinching makes the appropriate interior tandem arrangement constituent parts spiral mould circle of bottom land that places of the spring tip through the groove neck.

2, plain type three-dimensional bending tube plastic mould as claimed in claim 1, it is characterized in that: piece together in the plastic mould of forming by constituent parts spiral mould circle is staggered, at least must have the above snapping passage that forms by snap groove institute Series Code in a place or a place, in order to the button group or make things convenient at least one branch of removal or the spring tip more than.

3, plain type three-dimensional bending tube plastic mould as claimed in claim 1 is characterized in that: snap groove also can be opened on the overlap joint groove of each reed both-end, detains the group spring tip to replace the through hole of offering at least one end overlap joint groove.