CN220636083U - High-precision quick clamping bulging mechanism - Google Patents

Abstract

The utility model discloses a high-precision quick clamping bulging mechanism, which belongs to the technical field of pipe fitting machining and comprises a stripper plate (3), a stripper plate mounting seat (11), a punch (4), a movable cavity (5) and a jacket (6), wherein through holes for the punch (4) to pass through are formed in the stripper plate (3) and the stripper plate mounting seat (11), a first spring (7) and a first guide column (8) are arranged between the stripper plate (3) and the stripper plate mounting seat (11), and a second spring (9) and a second guide column (10) are arranged between the movable cavity (5) and the jacket (6); the bulging mechanism disclosed by the utility model is used for clamping the work pipe fitting all the time before and during bulging, and the workpiece is completely contacted with the movable cavity without intermittence during bulging, so that the problems of poor roundness after bulging and poor concentricity of the upper part and the lower part of the pipe fitting are solved.

Description

High-precision quick clamping bulging mechanism

Technical Field

The utility model relates to the technical field of pipe fitting machining, in particular to a high-precision rapid clamping bulging mechanism.

Background

In order to complete bulging of a pipe fitting, an existing bulging mechanism is shown in fig. 1 and consists of parts such as a fixed cavity 1, a fixed column 2, a stripper plate 3, a punch 4 and the like, wherein the fixed column 2 is in interference fit with the stripper plate 3 and the fixed cavity 1, the stripper plate 3 is fixed at a fixed position through the fixed column 2, a through hole is formed in the center of the stripper plate 3, the punch 4 can pass through the pipe fitting b after bulging and cannot pass through the pipe fitting b after bulging, and separation and discharging of the pipe fitting b after bulging and the punch 4 are achieved. The fixed die cavity 1 is of an integrated structure, the size of the fixed die cavity 1 is designed to be slightly larger than the size of the pipe fitting b after bulging, and the pipe fitting b after bulging can be taken out of the fixed die cavity 1. During processing, firstly, a blank of the bulging front pipe fitting a is placed into a cavity (figure 2), a punch 4 is pressed until the blank reaches a specified position to bulge (figure 4), after the bulging is finished, the punch 4 is lifted upwards, the punch 4 drives a workpiece to move upwards under the action of friction force between the inner surface of the bulging front pipe fitting a and the outer surface of the punch 4, and the pipe fitting a and the punch 4 are separated and unloaded under the action of a stripper plate 3.

Such bulging mechanisms have at least the following drawbacks: the fixed die cavity 1 is of an integral structure, the size of the die cavity is fixed, the size of the die cavity is designed to be larger than that of the pipe fitting b after bulging, a formed gap c ensures that the pipe fitting b after bulging can be pulled out along with the punch 4 (figure 4), namely the die cavity of the bulging mechanism is of a fixed structure and cannot be radially enlarged and reduced, and a gap is required to ensure that a workpiece is not locked by the die and can be pulled out from the die; the outer surface of the pipe fitting is not limited by a die in the bulging process due to the existence of a larger gap c between the die cavity and the workpiece, the surface of the pipe fitting is bulged to form a free bulging state, and the roundness quality after bulging is poor; because the blank of the pipe fitting a has unavoidable wall thickness deviation before bulging, the outer surface of the pipe fitting is not limited by a mould in the bulging process, and the concentricity of the upper part and the lower part of the pipe fitting b after bulging is poor.

Disclosure of Invention

The utility model aims to provide a high-precision quick clamping bulging mechanism so as to solve the problems.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a high accuracy presss from both sides tight bulging mechanism fast, includes stripper, stripper mount pad, drift, activity die cavity and overcoat, wherein, be provided with the through-hole that is used for the drift to pass through on stripper and the stripper mount pad, and be provided with first spring and first guide pillar between stripper and the stripper mount pad, be provided with second spring and second guide pillar between activity die cavity and the overcoat.

As a preferable technical scheme: the stripper plate mounting seat is provided with a containing cavity for containing the first spring, and the first guide pillar is connected with the stripper plate.

As a preferable technical scheme: the movable cavity is divided into a left half and a right half which are symmetrical, the outer circle of the movable cavity is tapered, the inner circle of the movable cavity is tapered, the two tapers are opposite in the same direction, and the movable cavity and the outer sleeve move up and down relatively to realize radial contraction of the movable cavity; specifically, the movable cavity positioned above is subjected to downward force, and moves downwards, and the left and right movable cavities are folded and clamped with the workpiece in the radial direction.

The principle of the utility model is as follows: and (3) large-size socket joint forming is performed, a stamping die is imitated, a wedge-shaped cavity is formed outside the socket joint large-size socket joint forming is tightly held by a material pressing plate, and a pipe fitting is formed by a punch after the wedge-shaped cavity is tightly held.

Compared with the prior art, the utility model has the advantages that: the bulging mechanism disclosed by the utility model is used for clamping the work pipe fitting all the time before and during bulging, and the workpiece is completely contacted with the movable cavity without intermittence during bulging, so that the problems of poor roundness after bulging and poor concentricity of the upper part and the lower part of the pipe fitting are solved.

Drawings

FIG. 1 is a block diagram of a prior art bulging mechanism;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of prior art punch depression;

FIG. 4 is a schematic drawing of a prior art expanded tubular element;

FIG. 5 is a block diagram of an embodiment of the present utility model;

FIG. 6 is a cross-sectional view of FIG. 5;

FIG. 7 is a schematic view of the punch depressing according to the embodiment of the present utility model;

FIG. 8 is a schematic drawing showing the pipe fitting after bulging in accordance with the present utility model;

FIG. 9 is a schematic view of the movable cavity prior to mating with the outer sleeve;

FIG. 10 is a schematic view of the movable cavity mated with the jacket;

figures 11 and 12 are the calculation of the taper between the movable cavity and the jacket.

In the figure: 1. fixing the die cavity; 2. fixing the column; 3. a stripper plate; 4. a punch; 5. A movable cavity; 6. a jacket; 7. a first spring; 8. a first guide post; 9. a second spring; 10. a second guide post; 11. a stripper plate mounting seat; a. bulging the front pipe fitting; b. bulging the pipe fitting; c. a gap; d. a pressing direction; e. the direction of movement of the punch.

Detailed Description

The utility model will be further described with reference to the accompanying drawings.

Examples

Referring to fig. 5, a high-precision rapid clamping bulging mechanism comprises a stripper plate 3, a stripper plate mounting seat 11, a punch 4, a movable cavity 5 and an outer sleeve 6, wherein through holes for the punch 4 to pass through are formed in the stripper plate 3 and the stripper plate mounting seat 11, and a first spring 7 and a first guide column 8 for the stripper plate 3 to move up and down are arranged between the stripper plate 3 and the stripper plate mounting seat 11; the stripper plate mounting seat 11 positioned above is used for mounting and rooting the stripper plate 3, the stripper plate 3 is connected to the stripper plate mounting seat 11 through the first guide pillar 8, the stripper plate mounting seat 11 is directly fixed to equipment to work without movement, and a gap is reserved between the stripper plate mounting seat 11 and the punch 4, so that the punch 4 can pass through the through hole freely; the first spring 7 provides an elastic force to enable the stripper plate 3 to keep a stripping position downwards in a natural state;

a second spring 9 and a second guide post 10 are arranged between the movable cavity 5 and the outer sleeve 6 and are used for automatically recovering after the movable cavity 5 radially contracts;

in this embodiment, the stripper plate mounting seat 11 is provided with a receiving cavity for receiving the first spring 7, and the first guide post 8 is connected with the stripper plate 3;

in this embodiment, referring to fig. 9 and fig. 10, the movable cavity 5 is divided into left and right halves, the outer circle of the movable cavity 5 is tapered, the inner circle of the movable cavity 5 is also tapered, the two tapers have the same size and opposite directions, and the movable cavity 5 and the outer sleeve 6 do up and down relative movement, so as to realize radial contraction of the movable cavity 5; the two blocks are combined and clamped to clamp the product, and the two blocks are separated to release the product;

the taper between the movable cavity and the jacket is calculated with reference to the clamping distance required by the movable cavity, such as:

as shown in fig. 11 and 12, an auxiliary calculation triangle is drawn by dotted lines, wherein the short straight edge of the triangle is A, the long straight edge is B, and the hypotenuse is C; b represents the distance that the movable cavity moves downwards after contacting the outer sleeve, A represents the distance that the movable cavity is synchronously held tightly on one side in the radial direction;

according to the definition of taper: taper = isosceles triangle base L/height H, the taper of the above mentioned movable cavity or jacket can be calculated as: 2A/B, the taper can also be changed to a specific angle by an inverse trigonometric function, namely: α=2×arctan a/B.

During operation, firstly, the bulging front pipe fitting a is put into the movable cavity 5 (figure 6), then the upper part of the mechanism moves down integrally, the downward pressing direction d is shown in figure 6, the stripper plate 3 is firstly contacted with the movable cavity 5 in the downward moving process, and the movable cavity 5 is compressed and then contracted, so that a workpiece is clamped; the punch 4 continues to move downwards until the punch reaches the set position, during which the first guide post 8 and the first spring 7 of the stripper plate continue to compress (fig. 7). After the bulging is completed, the punch 4 and the tube b after the bulging move upwards along the punch moving direction e in fig. 8, and the stripper plate 3 is pushed downwards under the action of the first spring 7, so that the workpiece is completely unloaded (fig. 8), and the whole bulging process is completed.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (3)

1. A high-precision quick clamping bulging mechanism is characterized in that: including stripper plate (3), stripper plate mount pad (11), drift (4), activity die cavity (5) and overcoat (6), wherein, be provided with the through-hole that is used for drift (4) to pass through on stripper plate (3) and stripper plate mount pad (11), and be provided with first spring (7) and first guide pillar (8) between stripper plate (3) and stripper plate mount pad (11), be provided with second spring (9) and second guide pillar (10) between activity die cavity (5) and overcoat (6).

2. The high precision rapid clamping bulging mechanism according to claim 1, wherein: the stripper plate mounting seat (11) is provided with a containing cavity for containing the first spring (7), and the first guide pillar (8) is connected with the stripper plate (3).

3. The high precision rapid clamping bulging mechanism according to claim 1, wherein: the movable cavity (5) is divided into a left half and a right half which are symmetrical, the outer circle of the movable cavity (5) is tapered, the inner circle of the movable cavity (5) is tapered, the two tapers are opposite in the same direction, and the movable cavity (5) and the outer sleeve (6) do relative movement up and down, so that the radial shrinkage of the movable cavity (5) is realized.