CN211175885U

CN211175885U - Clamping type sealing push head

Info

Publication number: CN211175885U
Application number: CN201921928961.3U
Authority: CN
Inventors: 王景晓; 高林玉; 胡家磊; 易斌
Original assignee: Weifang Belead Automobile Parts Co ltd
Current assignee: Weifang Belead Automobile Parts Co ltd
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2020-08-04
Anticipated expiration: 2029-11-11

Abstract

The utility model relates to the technical field of internal high pressure forming, and provides a clamping type sealing push head, which comprises a sealing part and a pushing part which are connected with each other; the sealing part is provided with a core rod capable of reciprocating along the axial direction and a plurality of clamping blocks which are annularly arranged in the circumferential direction and can reciprocate along the radial direction; the core rod and the clamping block are respectively and correspondingly provided with an inner clamping head and an outer clamping head; the core rod is also provided with a through hole for pressure medium to pass through. Therefore, the utility model arranges the mandrel which can be extended and contracted along the axial direction and the clamping block which can be extended and contracted along the radial direction in the sealing part; the core rod and the clamping block are respectively and correspondingly connected with the inner clamping head and the outer clamping head, and the inner clamping head and the outer clamping head clamp the pipe wall of the pipe blank to realize sealing. The processing precision requirement of the end opening of the tube blank is reduced, so that the processing difficulty and the processing cost are reduced. The sealing effect is good, and a sealing ring is not needed. The feeding mode is free feeding, and the propelling force of feeding is reduced.

Description

Clamping type sealing push head

Technical Field

The utility model belongs to the technical field of interior high-pressure forming, especially, relate to a clamping type seals and pushes away head.

Background

With the trend of light weight of automobiles, the internal high-pressure forming process is gradually becoming one of important technologies in the automobile part processing industry.

The existing push head commonly used in the internal high pressure forming process is in an internal sealing mode, referring to fig. 1, a protruding part of the push head extends into the tube blank 1 and cooperates with the inner wall of the die 11 to clamp the tube wall of the tube blank 1, and meanwhile, a sealing ring 12 is arranged to complete sealing. In order to ensure the sealing effect, the gap between the pipe wall of the pipe blank 1 and the pushing head needs to be as small as possible, so that the requirement on the processing precision of the pipe diameter of the port of the pipe blank 1 is high, and the processing difficulty and the processing cost are improved. During expanding material supplement, a large friction force exists between the pushing head and the pipe blank 1 and the die 11, so that a large material supplement propelling force is required.

In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks, an object of the present invention is to provide a clamping type sealing pusher, which comprises a sealing portion, a mandrel and a clamping block, wherein the mandrel is arranged in the sealing portion and can extend and retract along an axial direction; the core rod and the clamping block are respectively and correspondingly connected with the inner clamping head and the outer clamping head, and the inner clamping head and the outer clamping head clamp the pipe wall of the pipe blank to realize sealing. The processing precision requirement of the end opening of the tube blank is reduced, so that the processing difficulty and the processing cost are reduced. The sealing effect is good, and a sealing ring is not needed. The feeding mode is free feeding, and the propelling force of feeding is reduced.

In order to achieve the purpose, the utility model provides a clamping type sealing pushing head, which comprises a sealing part and a pushing part which are connected with each other;

the sealing part is provided with a core rod capable of reciprocating along the axial direction and a plurality of clamping blocks which are annularly arranged in the circumferential direction and can reciprocate along the radial direction; the core rod and the clamping block are respectively and correspondingly provided with an inner clamping head and an outer clamping head;

the core rod is also provided with a through hole for pressure medium to pass through.

According to the utility model discloses a sealed pusher of clamp type, the plug and the tight piece synchronization action of clamp of sealing.

According to the clamping type sealing pusher of the utility model, the core rod is sleeved with the clamping pushing piece which drives the core rod to reciprocate along the axial direction; the clamping block is provided with a guide inclined plane; the clamping pushing piece is provided with a protruding part used for pushing and abutting against the guide inclined plane of the clamping block.

According to the utility model discloses a sealed pushing head of clamp type, the return rod is still connected to the tight piece of clamp, the spring is cup jointed to the return rod.

According to the clamping type sealing pusher of the utility model, the core rod is also sleeved with the diameter-drawing piece; the outer chuck and the diameter drawing piece are respectively provided with inclined planes which correspond to each other.

According to the utility model discloses a closed head that pushes away of clamp, the quantity of pressing from both sides tight piece is 4 ~ 8.

According to the utility model discloses a clamping type seals and pushes away head, interior chuck is the loop configuration, and fixed cup joints in the outside of plug.

According to the utility model discloses a sealed pusher of clamp type, interior chuck and plug are electrically conductive material, and the current conducting plate is connected to the plug.

According to the utility model discloses a clamping type seals and pushes away head, the propulsion portion is the pneumatic cylinder.

The utility model aims to provide a clamping type sealing push head, which is characterized in that a core rod which can stretch out and draw back along the axial direction and a clamping block which can stretch out and draw back along the radial direction are arranged in a sealing part; the core rod and the clamping block are respectively and correspondingly connected with the inner clamping head and the outer clamping head, and the inner clamping head and the outer clamping head clamp the pipe wall of the pipe blank to realize sealing. The processing precision requirement of the end opening of the tube blank is reduced, so that the processing difficulty and the processing cost are reduced. The sealing effect is good, and a sealing ring is not needed. The feeding mode is free feeding, and the propelling force of feeding is reduced.

Drawings

FIG. 1 is a schematic diagram of a prior art configuration;

fig. 2 is a schematic structural diagram of the present invention;

FIG. 3 is a schematic view of the structure of a portion of FIG. 1;

fig. 4 is a schematic view of an operating state of the present invention;

fig. 5 is a schematic view of an operating state of the present invention;

fig. 6 is a schematic view of an operating state of the present invention;

fig. 7 is a schematic view of an operating state of the present invention;

in the figure: 1-a pipe blank, 11-a die, 12-a sealing ring, 2-a propelling part, 21-a bracket and 22-a guide block; 3-sealing part, 31-end cover, 32-core rod, 321-through hole, 322-conductive plate; 33-inner clamping head, 331-diameter-including piece; 34-clamping block, 341-outer clamping head, 342-restoring rod; 35-clamping pusher, 351-pushing hole, 352-retreating hole; 36-abdicating hole, 37-connecting plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The above-mentioned directions or positions of the upper, lower, left, right, etc. are referred to in this specification for better describing the technical solution in conjunction with the drawings, so that the reader can understand that the practical implementation includes but is not limited to this description.

Referring to fig. 2, the utility model provides a clamping type sealing pusher, which comprises a sealing part 3 and a pushing part 2 which are connected with each other;

the propulsion part 2 of the utility model is a hydraulic cylinder which is used for pushing the sealing part 3 to be close to the mould 11; further advancing during material supplementing to finish the expanding material supplementing of the tube blank 1; the propelling part 2 is fixed on a guide block 22, and the guide block 22 is connected on the bracket 21 in a sliding way, so that the height can be adjusted in the vertical direction.

Referring to fig. 3, the end of the sealing part 3 has an end cap 31 and the tail has a connecting plate 37 to which the propelling part 2 is connected.

Referring to fig. 4, the sealing portion 3 has a mandrel 32 that can be extended and retracted in the axial direction, and in conjunction with fig. 5, a plurality of clamping blocks 34 that are annularly arranged in the circumferential direction and can move in the radial direction; the core rod 32 and the clamping block 34 are respectively and correspondingly provided with an inner clamping head 33 and an outer clamping head 341. The number of the clamping blocks 34 is preferably 6, and those skilled in the art can make an adaptive setting according to the specification of the sealing push head, such as 4-8.

Referring to fig. 6 and 7, the mandrel 32 drives the inner collet 33 to axially extend, and the clamping block 34 drives the outer collet 341 to radially contract, which together clamp the wall of the tube blank 1. The inner clamping head 33 is preferably in an annular structure sleeved outside the mandrel 32, and is in surface contact with the inner wall of the tube blank 1 after being clamped, so that the end part of the tube blank 1 is sealed. Further, in order to increase the sealing effect, a diameter-including piece 331 is sleeved on the core rod 32; the outer collet 341 and the diameter-adjusting member 331 are respectively provided with corresponding slopes. When clamping, the end wall of the tube blank 1 is expanded and clamped between the outer clamp 341 and the diameter-regulating member 331, thereby increasing the sealing property of the end of the tube blank 1.

Preferably, the inner collet 33 and the mandrel 32 are both made of conductive materials, and the mandrel 32 is connected to the conductive plate 322; the conductive plate 322 extends from the relief hole 36 of the sealing part 3 to be connected to an external power source. The both ends of pipe 1 adopt respectively the utility model discloses a sealed back of pushing head, ohmic heating makes pipe 1 reach hot working temperature, later rises shape again, appears cold hardening after avoiding pipe 1 to process.

The core rod 32 is also provided with a through hole 321 for the passage of a pressure medium. The utility model discloses can be used to hydroform or physiosis shaping.

Preferably, the core rod 32 and the clamping block 34 of the sealing part 3 of the present invention are linked to extend and retract. In one embodiment, referring to FIG. 4, the mandrel 32 is sleeved with a clamping pusher 35 that drives the mandrel to reciprocate in an axial direction; the clamping block 34 is provided with a guide inclined surface; the clamping pusher 35 has a projection for pushing against the guiding bevel of the clamping block 34.

The clamping block 34 is further connected with a return rod 342, and the return rod 342 is sleeved with a spring and used for returning the clamping block 34.

Preferably, the clamping and pushing member 35 is hydraulically actuated. The oil is fed from the propelling hole 351, and the clamping and pushing piece 35 advances and drives the core rod 32 and the clamping block 34 to synchronously extend; oil is fed from the retreat hole 352, the clamping and pushing member 35 retreats and drives the core rod 32 to retreat, and the clamping block 34 is reset under the action of the spring.

The extension and retraction of the mandrel 32 and the clamping block 34 can be independently achieved by one skilled in the art by independently extending and retracting the mandrel 32 and the clamping block 34, respectively, such as by using a known structure or method.

The utility model discloses a sealed pushing head adopts the clamping mode sealed, and is sealed effectual and need not to adopt the sealing washer. The clamping blocks 34 move along the radial direction to clamp the pipe wall of the pipe blank 1, so that the machining precision requirement of the end opening of the pipe blank 1 is reduced, and the machining difficulty and the machining cost are reduced. The feeding mode is free feeding, and the propelling force of feeding is reduced.

The utility model also provides an adopt the metal forming technology of this clamping type seal pushing head, including following step:

firstly, clamping a tube blank 1 on a mold;

secondly, pushing parts 2 of sealing pushing heads at two ends of the tube blank 1 push the sealing parts 3 to be close to the die, and the end part of the tube blank 1 enters a clamping working position of the sealing parts 3 (see figure 4); the gap between the sealing part 3 and the die is reserved with a feeding material, and a person skilled in the art can reserve a proper gap according to the feeding material amount required by the formed pipe.

Thirdly, the core rod 32 and the clamping block 34 are extended, and the inner clamping head 33 and the outer clamping head 341 clamp the end part of the tube blank 1 together; (see FIG. 6)

Fourthly, electrifying to heat the tube blank 1 to a preset temperature; the heating temperature needs to reach the hot working temperature of the tube blank 1, so that the cold hardening phenomenon after the expansion is avoided. One skilled in the art can set the temperature or range of heating required according to the material and process requirements of the formed pipe.

And fifthly, introducing pressure medium from the through hole 321 of the core rod 32 to complete the expansion of the tube blank 1.

The forming method is generally used for the inflation forming process, i.e., the pressure medium introduced into the through hole 321 of the mandrel 32 is gas. In a special case, the method can also be used for hydroforming, i.e., the pressure medium introduced into the through hole 321 of the mandrel 32 is water. When the device is used for hydraulic forming, a person skilled in the art can select a proper prior art to make insulation of forming equipment or a device, and the phenomenon that electric leakage hurts people during power-on heating is avoided.

In summary, the utility model provides a clamping type sealing pusher, which is provided with a core rod capable of extending along the axial direction and a clamping block capable of extending along the radial direction in a sealing part; the core rod and the clamping block are respectively and correspondingly connected with the inner clamping head and the outer clamping head, and the inner clamping head and the outer clamping head clamp the pipe wall of the pipe blank to realize sealing. The processing precision requirement of the end opening of the tube blank is reduced, so that the processing difficulty and the processing cost are reduced. The sealing effect is good, and a sealing ring is not needed. The feeding mode is free feeding, and the propelling force of feeding is reduced.

Naturally, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and it is intended that all such changes and modifications be considered as within the scope of the appended claims.

Claims

1. The clamping type sealing push head is characterized by comprising a sealing part and a pushing part which are connected with each other;

2. The gripping seal pusher head of claim 1, wherein the mandrel and gripping block of the sealing section act in unison.

3. The clamping type sealing pusher head of claim 2, wherein the mandrel is sleeved with a clamping pushing piece which drives the mandrel to reciprocate along the axial direction; the clamping block is provided with a guide inclined plane; the clamping pushing piece is provided with a protruding part used for pushing and abutting against the guide inclined plane of the clamping block.

4. The clamp-on sealing pusher head of claim 3, wherein the clamping block is further coupled to a return rod, the return rod being sleeved with a spring.

5. The gripping seal pusher head of claim 1, wherein a diameter piece is further sleeved on the mandrel; the outer chuck and the diameter drawing piece are respectively provided with inclined planes which correspond to each other.

6. The clamping type sealing pusher head of claim 1, wherein the number of the clamping blocks is 4-8.

7. The gripping seal pusher head of claim 1 wherein the inner collet is of annular configuration and is fixedly sleeved on the exterior of the mandrel.

8. The clamping-type sealing pusher head of any one of claims 1 to 7, wherein the inner collet and the mandrel are both made of conductive material, and the mandrel is connected to the conductive plate.

9. The pinch-sealed pusher head of claim 8, wherein the pusher portion is a hydraulic cylinder.