CN222659884U - A tube expansion device - Google Patents

Abstract

The utility model discloses a pipe expanding device which comprises a frame, wherein a positioning and pressing mechanism and a stamping mechanism are arranged on the frame, and the pipe expanding device is characterized in that the positioning and pressing mechanism comprises a lower die, an upper die and a vertical pressing cylinder, the upper surface of the lower die is provided with a lower groove, the lower surface of the upper die is provided with an upper groove, the upper groove and the lower groove are vertically corresponding, the lower die is relatively fixed with the frame, the output end of the vertical pressing cylinder is connected with the upper die, the lower groove comprises a front transverse pipe section lower positioning and clamping groove and a middle longitudinal pipe section lower positioning and clamping groove, the upper groove comprises a front transverse pipe section upper positioning and clamping groove and a middle longitudinal pipe section upper positioning and clamping groove, the stamping mechanism comprises a punch and a horizontal pressing cylinder, and the output end of the horizontal pressing cylinder is connected with the punch. The utility model can be used for automatic positioning and pressing and automatic tube expansion of the front end of the bent tube during tube expansion processing, can prevent the movement or rotation of workpieces, can improve the production efficiency, saves time and labor and ensures the processing precision.

Description

Pipe expanding device

Technical Field

The utility model relates to a pipe expanding device.

Background

Automotive air conditioning ductwork is also a core component of an automobile. With the development of the market, as the requirement on the space utilization rate of the automobile is higher, the connection degree of the air conditioner pipeline is also more and more strict, and various types are presented. Referring to fig. 1, for a prior art elbow joint, the elbow joint includes a front transverse pipe section N-1, a middle longitudinal pipe section N-2, and a rear transverse pipe section N-3, which are generally zigzag in shape. In the production process, a front joint N-11 with a larger inner diameter is required to be processed at the port of the front transverse pipe section N-1, namely a pipe expanding process.

The bent pipe joint is of a special-shaped structure, the original clamp is symmetrically clamped by two V-shaped blocks (refer to CN204354005U, CN209424581U and the like), and the workpiece is easy to loose in axial and steering after being stressed due to axial impulsive force in tube expansion processing, and meanwhile, the clamping part can slip, so that the forming quality, the dimensional precision and the surface scratch are seriously affected.

Disclosure of utility model

The utility model provides a pipe expanding device, which solves the problems that the existing elbow joint can loose in axial and steering directions during pipe expanding processing and the clamping position can slip.

The technical scheme of the utility model is that the pipe expanding device comprises a frame, wherein a positioning and pressing mechanism and a stamping mechanism are arranged on the frame, and the pipe expanding device is characterized in that the positioning and pressing mechanism comprises a lower die, an upper die and a vertical pressing cylinder, wherein a lower groove is formed in the upper surface of the lower die, an upper groove is formed in the lower surface of the upper die, the upper groove corresponds to the lower groove in an up-down mode, the lower die is relatively fixed with the frame, the output end of the vertical pressing cylinder is connected with the upper die, the lower groove comprises a front transverse pipe section lower positioning and clamping groove and a middle longitudinal pipe section lower positioning and clamping groove, and the upper groove comprises a front transverse pipe section upper positioning and clamping groove and a middle longitudinal pipe section upper positioning and clamping groove;

the stamping mechanism comprises a punch and a horizontal pressing cylinder, and the output end of the horizontal pressing cylinder is connected with the punch.

Further, the output end of the horizontal pressure cylinder is fixedly connected with a sliding seat, and a punch is fixedly arranged on the sliding seat;

The horizontal guide rail is fixedly arranged on the frame, the sliding seat is in sliding fit with the horizontal guide rail, and the horizontal pressing cylinder is fixedly arranged on the frame.

Further, the horizontal guide rail is provided with two parallel and spaced apart.

Further, the lower die is fixedly arranged on the frame, and a vertical guide post is fixedly arranged on the lower die;

the upper die is in sliding fit with the vertical guide post, and the vertical pressing cylinder is fixedly arranged on the frame.

Further, the vertical guide posts are two and are distributed at intervals in parallel.

Further, a rear transverse pipe section supporting table is arranged on the lower die.

The utility model has the beneficial effects that:

Firstly, the horizontal type pipe expanding machining is adopted, so that the automatic positioning and compression of the workpiece and the automatic pipe expanding machining can be realized, the operation is simple, the time and the labor are saved, the labor intensity can be reduced, the production product is improved, and the machining quality of the workpiece is ensured;

Secondly, the workpiece cannot be loosened in the axial direction and in the steering direction after being stressed when the axial impact force is applied to the expansion pipe processing, and the clamping part can be loosened and slipped, so that the forming quality and the dimensional accuracy are ensured, and the surface cannot be scratched;

Thirdly, the horizontal pressing cylinder drives the sliding seat to move along the horizontal guide rail in a guiding way during punching, and the punch moves linearly during punching and resetting, so that the machining precision can be ensured;

Fourth, because the vertical pressing cylinder drives the upper die to move up and down along the guide of the vertical guide post, the upper die moves linearly, so that the workpiece is symmetrically positioned and symmetrically clamped by the upper groove and the lower groove, the positioning precision of the workpiece is improved, the workpiece is completely clamped in place, and meanwhile, the workpiece is prevented from being damaged by dislocation pressing and loosening can be avoided;

fifth, the lower die is also provided with the rear transverse pipe section supporting table, the rear transverse pipe section supporting table horizontally supports the rear transverse pipe section of the workpiece, the workpiece is facilitated to be prevented from rotating and loosening, and meanwhile vibration and displacement conditions of the rear transverse pipe section of the workpiece can be conveniently observed during stamping.

Drawings

Fig. 1 is a diagram showing a comparison of a conventional elbow joint before and after expansion processing.

Fig. 2 to 4 are schematic structural views of a tube expansion device according to the present utility model.

Fig. 5-6 are schematic structural views of an expansion device for placing a workpiece in accordance with the present utility model.

Fig. 7 is an enlarged view at a in fig. 5.

Fig. 8-10 are schematic structural views of a tube expansion device according to the present utility model when a workpiece is positioned and compressed and the tube is expanded in place.

Detailed Description

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

the pipe expanding device comprises a frame 1, wherein a positioning and pressing mechanism 2 and a stamping mechanism 3 are arranged on the frame 1, the positioning and pressing mechanism 2 comprises a lower die 2-1, an upper die 2-2 and a vertical pressing cylinder 2-3, a lower groove 2-11 is formed in the upper surface of the lower die 2-1, an upper groove 2-21 is formed in the lower surface of the upper die 2-2, the upper groove 2-21 and the lower groove 2-11 are vertically corresponding to each other, the lower die 2-1 is relatively fixed with the frame 1, the output end of the vertical pressing cylinder 2-3 is connected with the upper die 2-2, the lower groove 2-11 comprises a front transverse pipe section lower positioning and clamping groove 2-111 and a middle longitudinal pipe section lower positioning and clamping groove 2-112, and the upper groove 2-21 comprises a front transverse pipe section upper positioning and clamping groove 2-211 and a middle longitudinal pipe section upper positioning and clamping groove 2-212;

The stamping mechanism 3 comprises a punch 3-1 and a horizontal pressing cylinder 3-2, and the output end of the horizontal pressing cylinder 3-2 is connected with the punch 3-1.

When the pipe expanding device is used, a workpiece (namely an elbow joint) is positioned and pressed, and then pipe expanding processing is carried out.

When the workpiece is positioned and pressed, the workpiece is positioned and placed in the lower groove 2-11 (see fig. 5-7), the front transverse pipe section N-1 of the workpiece is positioned and pressed in the front transverse pipe section lower positioning and clamping groove 2-111, the longitudinal pipe section N-2 is positioned and clamped in the front transverse pipe section lower positioning and clamping groove 2-111, then the vertical pressing cylinder 2-3 is started to work, the vertical pressing cylinder 2-3 drives the upper die 2-2 to move downwards and keep a pressure state (the upper die 2-2 and the lower die 2-1 are clamped to clamp the workpiece in a positioning and clamping mode), and at the moment, the front transverse pipe section upper positioning and clamping groove 2-211 and the front transverse pipe section lower positioning and clamping groove 2-111 are combined to clamp the front transverse pipe section N-1 of the workpiece, and the middle longitudinal pipe section upper positioning and clamping groove 2-212 and the middle longitudinal pipe section lower positioning and clamping groove 2-112 are combined to clamp the middle longitudinal pipe section N-2 of the workpiece (see fig. 8-10). Then the tube expansion process can be performed.

During tube expansion processing, a horizontal pressure cylinder 3-2 is started to work, the horizontal pressure cylinder 3-2 drives the punch 3-1 to punch towards the front transverse tube section N-1 port, and the front transverse tube section N-1 port is expanded and deformed under the action of the punch 3-1 to obtain a front joint N-11 with an enlarged inner diameter (see fig. 8-10).

When the end opening of the front transverse pipe section N-1 of the workpiece is axially stressed (namely when the punch 3-1 punches), the longitudinal pipe section N-2 cannot move along the axial direction of the front transverse pipe section N-1 in the upper positioning clamping groove 2-212 of the middle longitudinal pipe section and the lower positioning clamping groove 2-112 of the middle longitudinal pipe section, so that a blocking effect is generated and the front transverse pipe section N-1 cannot axially loosen;

When the end opening of the front transverse pipe section N-1 of the workpiece is axially stressed (namely, when the punch 3-1 punches), the longitudinal pipe section N-2 is clamped in the upper positioning clamping groove 2-212 of the middle longitudinal pipe section and the lower positioning clamping groove 2-112 of the middle longitudinal pipe section and is restrained by the lower die 2-1 and the upper die 2-2 so as not to swing up and down, and further, an anti-rotation effect is generated so that the front transverse pipe section N-1 cannot rotate and loosen.

Therefore, the workpiece is not loosened in axial direction and steering direction after being stressed when the axial impulsive force is processed by the workpiece expanding tube, and the clamping part is loosened and slipped, so that the forming quality and the dimensional accuracy are ensured, and the surface is not scratched. Meanwhile, the embodiment adopts the horizontal type processing (different from the conventional vertical type processing) of the expansion pipe, can realize the automatic positioning and compression of the workpiece, and the automatic expansion pipe processing, has simple operation, saves time and labor, can reduce the labor intensity, improves the production product, and ensures the processing quality of the workpiece.

Referring to fig. 2-4, further, the output end of the horizontal pressing cylinder 3-2 is fixedly connected with a sliding seat 3-3, a punch 3-1 is fixedly installed on the sliding seat 3-3, a horizontal guide rail 3-4 is fixedly arranged on the machine frame 1, the sliding seat 3-3 is in sliding fit with the horizontal guide rail 3-4, and the horizontal pressing cylinder 3-2 is fixedly installed on the machine frame 1. Further, the horizontal guide rails 3-4 have two parallel and spaced apart.

In this way, the horizontal pressing cylinder 3-2 drives the sliding seat 3-3 to move along the horizontal guide rail 3-4 in a guiding way during working, and the punch 3-1 moves linearly during punching and resetting, so that the machining precision can be ensured.

Referring to fig. 2-4, further, the lower die 2-1 is fixedly installed on the frame 1, the vertical guide post 2-4 is fixedly arranged on the lower die 2-1, the upper die 2-2 is in sliding fit with the vertical guide post 2-4, and the vertical pressing cylinder 2-3 is fixedly installed on the frame 1. Further, the vertical guide posts 2-4 are two and are distributed at intervals in parallel.

Therefore, when the vertical pressing cylinder 2-3 works, the upper die 2-2 is driven to move up and down along the guide of the vertical guide post 2-4, and the upper die 2-2 moves linearly, so that a workpiece is symmetrically positioned and symmetrically clamped by the upper groove 2-21 and the lower groove 2-11, the positioning precision of the workpiece is improved, the workpiece is completely clamped in place, and meanwhile, the workpiece is prevented from being damaged by dislocation pressing and loosening can be avoided.

Preferably, the horizontal pressure cylinder 3-2 and the vertical pressure cylinder 2-3 are telescopic cylinders driven by hydraulic media.

In the second embodiment, as shown in fig. 8-10, a back transverse pipe section supporting table 2-12 is further arranged on the lower die 2-1. The rear transverse pipe section supporting table 2-12 horizontally supports the rear transverse pipe section N-3 of the workpiece, is beneficial to the rotation and looseness prevention of the workpiece, and can conveniently observe the vibration and displacement conditions of the rear transverse pipe section N-3 of the workpiece during stamping.

The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims (6)

1. The pipe expanding device comprises a frame (1), wherein a positioning and pressing mechanism (2) and a stamping mechanism (3) are arranged on the frame (1), and is characterized in that:

The positioning and compacting mechanism (2) comprises a lower die (2-1), an upper die (2-2) and a vertical pressing cylinder (2-3), wherein a lower groove (2-11) is formed in the upper surface of the lower die (2-1), an upper groove (2-21) is formed in the lower surface of the upper die (2-2), the upper groove (2-21) and the lower groove (2-11) are vertically corresponding, the lower die (2-1) is relatively fixed with the frame (1), and the output end of the vertical pressing cylinder (2-3) is connected with the upper die (2-2);

The lower groove (2-11) comprises a front transverse pipe section lower positioning clamping groove (2-111) and a middle longitudinal pipe section lower positioning clamping groove (2-112), and the upper groove (2-21) comprises a front transverse pipe section upper positioning clamping groove (2-211) and a middle longitudinal pipe section upper positioning clamping groove (2-212);

The stamping mechanism (3) comprises a punch (3-1) and a horizontal pressure cylinder (3-2), and the output end of the horizontal pressure cylinder (3-2) is connected with the punch (3-1).

2. The pipe expanding device according to claim 1, wherein the output end of the horizontal pressure cylinder (3-2) is fixedly connected with a sliding seat (3-3), and a punch (3-1) is fixedly arranged on the sliding seat (3-3);

The horizontal guide rail (3-4) is fixedly arranged on the frame (1), the sliding seat (3-3) is in sliding fit with the horizontal guide rail (3-4), and the horizontal pressure cylinder (3-2) is fixedly arranged on the frame (1).

3. An expansion device according to claim 2, characterized in that said horizontal guide rails (3-4) are two and spaced apart in parallel.

4. An expansion device according to any one of claims 1-3, characterized in that the lower die (2-1) is fixedly arranged on the frame (1), and the lower die (2-1) is fixedly provided with a vertical guide post (2-4);

the upper die (2-2) is in sliding fit with the vertical guide post (2-4), and the vertical pressing cylinder (2-3) is fixedly arranged on the frame (1).

5. An expansion device according to claim 4, wherein the vertical guide posts (2-4) are two and spaced apart in parallel.

6. An expansion device according to claim 1, characterized in that the lower die (2-1) is further provided with a rear transverse tube section support table (2-12).