Positioning clamp for machining hollow metal pipe of automobile

Abstract

The utility model discloses a positioning fixture for processing an automobile hollow metal pipe, which comprises a connecting pipe, two ends of the connecting pipe are fixedly connected with mounting discs, two ends of the connecting pipe are provided with pressure locking mechanisms, and the hollow metal pipe is continuously and internally supported in a pressure self-holding mode. According to the positioning clamp for machining the automobile hollow metal pipe, the mode that the mounting disc is matched with the inner supporting rod to conduct inner supporting, positioning and clamping on the hollow metal pipe from the inner side is adopted, so that when the hollow metal pipe is further clamped by external force, the clamped position can be kept not to deform, and high-pressure air is injected into the connecting pipe; the inner supporting rod can be limited under the action of the sliding rod driven by pressure after sliding and making contact with the inner wall of the hollow metal pipe for supporting, and the purpose of positioning and clamping the hollow metal pipe inner supports of various preset specifications is achieved in the mode that the position of the sliding rod after sliding out is matched with the preset inner diameter of the hollow metal pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of hollow metal tube processing, in particular to a positioning fixture for processing automobile hollow metal tubes. Background Technique

[0002] Before processing the hollow metal tube, it is first necessary to determine the processing dimensions. Generally, according to specific usage requirements and processing technological processes, parameters such as the outer diameter, wall thickness, and length of the hollow metal tube are determined. To ensure the accuracy of the processing dimensions, professional numerical control forming equipment can be used for processing operations. In order to facilitate operations such as forming and drilling during the processing, cutting tools are needed to cut the hollow metal tube. The cutting methods can include cold saw cutting, hot saw cutting, and manual cutting, etc. Among them, the hot saw cutting speed is relatively fast, but heat-resistant tools are required; the cold saw cutting has lower requirements for tools, but the speed is slower. When forming the hollow metal tube, it is necessary to consider both ensuring the processing quality and the processing speed. Generally, before forming, the hollow metal tube is first heated and softened to facilitate the forming operation. The forming methods can include hammering, rolling, coiling, etc. The specific selection should consider factors such as processing efficiency, processing quality, and tool cost. Drilling and punching are common methods in the processing of hollow metal tubes. To ensure the accuracy and quality of drilling and punching, appropriate drills and punching machinery and equipment need to be equipped. Importantly, during the processing, it is necessary to ensure that the positions, dimensions, and quantities of drilling and punching meet the requirements for subsequent use. In some cases, the hollow metal tube needs to be welded. The welding methods can include manual welding, automatic welding, etc. However, it should be noted that before welding, the surface of the hollow metal tube must be cleaned to ensure the quality and stability of the welding area. At the same time, appropriate welding temperature and welding time also need to be maintained. However, no matter what kind of processing, when external shape processing is required by applying pressure to the hollow metal tube, a positioning fixture is needed for fixation. At this time, it is necessary to ensure the clamping force so that the hollow metal tube will not move due to the progress of the processing, and at the same time, it is necessary to prevent the hollow metal tube from deforming due to external clamping force. This requires relatively high operating experience for the clamping workers and is not conducive to improving the clamping work efficiency. Content of the Utility Model

[0003] The purpose of the utility model is to provide a positioning fixture for processing automobile hollow metal tubes to solve the problem of deformation during the processing of hollow metal tubes caused by the difficulty in controlling the clamping force as mentioned in the above background technique.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a positioning fixture for processing automobile hollow metal tubes, comprising a connecting tube, both ends of the connecting tube are fixedly connected with mounting plates, and the side surface of the mounting plate is installed with a sliding inner support rod, and the outer surface of the inner support rod is fixedly provided with a contact block, and both ends of the connecting tube are provided with a pressure locking mechanism, which continuously supports the hollow metal tube in a self-maintaining manner by means of pressure.

[0005] Preferably, the pressure locking mechanism includes: a closed tail rod, which is fixedly arranged on the side surface of the mounting plate on one side, and a connecting top rod is fixedly connected to the side surface of the mounting plate on the other side, and one end of the connecting top rod is connected to a connecting rod, and an air inlet joint is fixedly installed on one end of the connecting rod, a pressure chamber is opened inside the side surface of the mounting plate, and the other end of the pressure chamber passes through the outer surface of the mounting plate, a sliding sliding rod is installed inside the side surface of the mounting plate, a sliding closing plate is installed inside the outer surface of the mounting plate, and one end of the closing plate is fixedly connected to an adsorption block, a groove is opened on the side surface of one end of the inner support rod located inside the mounting plate, and a pressure relief groove is opened inside the inner support rod, and one end of the pressure relief groove passes through the outer surface of the inner support rod.

[0006] By adopting the above technical solution, the inner wall of the hollow metal tube is continuously supported and clamped by air pressure.

[0007] Preferably, an unlocking ring is provided on one side of the connecting rod, and an adsorption magnet is fixedly provided on the outer surface of the unlocking ring on a side facing the connecting rod.

[0008] By adopting the above technical solution, the adsorption block can drive the closing plate to slide under the adsorption of the adsorption magnet to release the sealing of one end of the pressure chamber.

[0009] Preferably, the connecting tube is of hollow design, and the mounting plate is of an annular design with a hole in the middle, the inner support rod is connected to the mounting plate by sliding friction, and the end of the inner support rod located outside the mounting plate is of arc design, the contact block is a columnar protrusion made of rubber material, and the contact blocks are evenly distributed on the outer surface of the inner support rod.

[0010] By adopting the above technical solution, the inner support rod can stably support, position and clamp the hollow metal tube through the contact block.

[0011] Preferably, the end of the closed tail rod away from the mounting plate is of closed design, and the connecting top rod is threadedly connected to the connecting rod.

[0012] By adopting the above technical solution, the connecting rod can be threadedly connected to the connecting top rod so that a worker can hold the hollow metal tube from the outside and inject high-pressure air into the connecting top rod through the air inlet joint at one end of the connecting rod.

[0013] Preferably, one end of the pressure chamber penetrates through the inner surface of the central hole of the mounting disc, and a check valve is fixedly installed at the end where the pressure chamber penetrates through the inner surface of the central hole of the mounting disc. The sliding rod is designed as an arc-shaped column, and the sliding rod is in sliding friction connection with the mounting disc. One end of the sliding rod penetrates through the inner surface of the pressure chamber, and a spring is connected between one end of the sliding rod and the inner surface of the pressure chamber.

[0014] With the above technical solution, when the pressure support of the sliding rod is lost, the sliding rod can slide and reset under the pulling of the spring.

[0015] Preferably, the closing plate is in sliding friction connection with the mounting disc, a spring is connected between the adsorption block and the mounting disc, and one end of the closing plate penetrates through the end of the pressure chamber facing the outside of the mounting disc.

[0016] With the above technical solution, the closing plate can close one end of the pressure chamber.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: The positioning fixture for processing the hollow metal tube of the automobile:

[0018] 1. By adopting the method of using the mounting disc and the inner support rod to perform inner support positioning and clamping on the hollow metal tube from the inside, when the hollow metal tube is further clamped by an external force, the clamped position can be maintained without deformation, ensuring both clamping and preventing the deformation of the hollow metal tube caused by clamping.

[0019] 2. Further, by injecting high-pressure air into the connecting pipe, after the inner support rod slides and contacts the inner wall of the hollow metal tube to provide support, it can be limited by the sliding rod driven by pressure. By matching the position of the sliding rod after it slides out with the preset inner diameter of the hollow metal tube, the purpose of inner support positioning and clamping of hollow metal tubes with multiple preset specifications can be achieved.

[0020] 3. Furthermore, by adopting the method of connecting the closed tail rod with the tailstock center of the lathe to connect the ejector rod and the threaded rod, after the hollow metal tube is internally supported and clamped, it can be fixed by the lathe through the center drill and the three-jaw chuck, achieving the purpose of processing the hollow metal tube without relying on other clamping parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic three-dimensional structure diagram of the whole of the present utility model;

[0022] Figure 2 It is a schematic three-dimensional structure diagram of the connection between the mounting disc and the closed tail rod of the present utility model;

[0023] Figure 3 It is a schematic three-dimensional structure diagram of the cross-section of the connection between the ejector rod and the connecting rod of the present utility model;

[0024] Figure 4 This is a three-dimensional structure schematic diagram of the cross-section of the mounting plate and the inner support rod of the present utility model;

[0025] Figure 5 This is a three-dimensional structure schematic diagram of the cross-section of the mounting plate and the closing plate of the present utility model;

[0026] Figure 6 This is a three-dimensional structure schematic diagram of the cross-section of the inner support rod in the unfolded state of the present utility model.

[0027] In the figure: 1, connecting pipe; 2, mounting plate; 3, inner support rod; 4, contact block; 5, closing tail rod; 6, communicating top rod; 7, connecting rod; 8, air inlet joint; 9, pressure chamber; 10, one-way valve; 11, sliding rod; 12, closing plate; 13, adsorption block; 14, card slot; 15, pressure relief groove; 16, unlocking ring; 17, adsorption magnet. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0029] Please refer to Figures 1-6 , the present utility model provides a technical solution: a positioning fixture for processing automotive hollow metal pipes.

[0030] Embodiment 1

[0031] In this embodiment, it is disclosed that: a connecting pipe 1, both ends of the connecting pipe 1 are fixedly connected with a mounting plate 2, and a sliding inner support rod 3 is installed on the side surface of the mounting plate 2, and a contact block 4 is fixedly arranged on the outer surface of the inner support rod 3. Pressure locking mechanisms are arranged at both ends of the connecting pipe 1 to continuously internally support the hollow metal pipe by means of pressure self-holding;

[0032] The pressure locking mechanism includes: a closed tail rod 5, the closed tail rod 5 is fixedly arranged on the side surface of the mounting disk 2 on one side, the side surface of the mounting disk 2 on the other side is fixedly connected with a communicating top rod 6, and one end of the communicating top rod 6 is connected with a connecting rod 7, and one end of the connecting rod 7 is fixedly installed with an air inlet joint 8. A pressure chamber 9 is arranged inside the side surface of the mounting disk 2, and the other end of the pressure chamber 9 penetrates through the outer surface of the mounting disk 2. A sliding sliding rod 11 is installed inside the side surface of the mounting disk 2, and a sliding closing plate 12 is installed inside the outer surface of the mounting disk 2, and one end of the closing plate 12 is fixedly connected with an adsorption block 13. A clamping groove 14 is arranged on the side surface of one end of the inner support rod 3 located inside the mounting disk 2, and a pressure relief groove 15 is arranged inside the inner support rod 3, and one end of the pressure relief groove 15 penetrates through the outer surface of the inner support rod 3;

[0033] The connecting pipe 1 is designed to be hollow, and the mounting disk 2 is designed to be a ring with a hole in the middle. The inner support rod 3 is in sliding friction connection with the mounting disk 2, and one end of the inner support rod 3 located outside the mounting disk 2 is arc-shaped. The contact block 4 is a columnar protrusion made of rubber material, and the contact blocks 4 are evenly distributed on the outer surface of the inner support rod 3;

[0034] One end of the closed tail rod 5 away from the mounting disk 2 is closed, and the communicating top rod 6 and the connecting rod 7 are in threaded connection;

[0035] One end of the pressure chamber 9 penetrates through the inner side surface of the central hole of the mounting disk 2, and a one-way valve 10 is fixedly installed at the end of the pressure chamber 9 penetrating through the inner side surface of the central hole of the mounting disk 2. The sliding rod 11 is designed to be an arc-shaped column, and the sliding rod 11 is in sliding friction connection with the mounting disk 2. One end of the sliding rod 11 penetrates through the inner side surface of the pressure chamber 9, and a spring is connected between one end of the sliding rod 11 and the inner side surface of the pressure chamber 9;

[0036] The closing plate 12 is in sliding friction connection with the mounting disk 2, a spring is connected between the adsorption block 13 and the mounting disk 2, and one end of the closing plate 12 penetrates through the pressure chamber 9 towards the outside of the mounting disk 2;

[0037] During installation, first fix the connecting rod 7 and the communicating push rod 6 by screwing them at one end. Then hold the connecting rod 7 and insert the connecting pipe 1 into the interior of the hollow metal pipe. At this time, connect the external air pipe to the air inlet joint 8 and inject high-pressure air into the interior of the connecting rod 7. The connecting rod 7 injects the high-pressure air into the interior of the connecting pipe 1 through the communicating push rod 6. Under the sealing action of the closed tail rod 5, the interior of the connecting pipe 1 is pressurized. At this time, the pressure in the central hole of the mounting plate 2 increases, pushing the inner support rod 3 to slide until the inner support rod 3 contacts and supports the inner wall of the hollow metal pipe through the contact block 4. At this time, as the inner support rod 3 cannot continue to slide, the pressure in the central hole of the mounting plate 2 continues to increase and enters the pressure chamber 9 through the one-way valve 10. The sliding rod 11 facing the card slot 14 is pushed to slide until the sliding rod 11 engages with the card slot 14. The pressure relief groove 15 serves to balance the pressure between the card slot 14 and the external environment, preventing the sliding rod 11 facing the card slot 14 from being unable to slide, achieving the locking of the inner support rod 3. At this time, remove the connecting rod 7. At this time, due to the action of the one-way valve 10, the inner support rod 3 can obtain continuous support and can be used separately from the high-pressure gas source for installation.

[0038] Embodiment 2

[0039] This embodiment discloses on the basis of Embodiment 1: An unlocking ring 16 is provided on one side of the connecting rod 7, and an adsorption magnet 17 is fixedly arranged on the outer surface of the unlocking ring 16 facing the connecting rod 7.

[0040] When unlocking is required, drive the adsorption magnet 17 to move to the side surface of the mounting plate 2 through the unlocking ring 16 to adsorb the adsorption block 13. At this time, the adsorption block 13 drives the closing plate 12 to slide, enabling the pressure chamber 9 to communicate with the external environment. At this time, the sliding rod 11 slides back under the spring pull of the spring between it and the pressure chamber 9, completing the unlocking of the inner support rod 3.

[0041] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning fixture for processing a hollow metal tube for an automobile, comprising a connecting tube (1), both ends of the connecting tube (1) being fixedly connected to mounting plates (2), a sliding inner support rod (3) being mounted on the side surface of the mounting plate (2), and a contact block (4) being fixedly disposed on the outer surface of the inner support rod (3), characterized in that: Both ends of the connecting pipe (1) are provided with pressure locking mechanisms, which continuously support the hollow metal pipe in a self-maintaining manner.

2. The positioning fixture for processing a hollow metal tube for automobiles according to claim 1, characterized in that: The pressure locking mechanism comprises: a closed tail rod (5), the closed tail rod (5) being fixedly arranged on the side surface of the mounting plate (2) on one side, a connecting top rod (6) being fixedly connected to the side surface of the mounting plate (2) on the other side, one end of the connecting top rod (6) being connected to a connecting rod (7), and one end of the connecting rod (7) being fixedly installed with an air intake joint (8), a pressure chamber (9) being provided inside the side surface of the mounting plate (2), and the other end of the pressure chamber (9) passing through the outer surface of the mounting plate (2), a sliding sliding rod (11) being provided inside the side surface of the mounting plate (2), a sliding closing plate (12) being provided inside the outer surface of the mounting plate (2), and one end of the closing plate (12) being fixedly connected with an adsorption block (13), a slot (14) being provided on the side surface of one end of the inner support rod (3) located inside the mounting plate (2), and a pressure relief groove (15) being provided inside the inner support rod (3), and one end of the pressure relief groove (15) passing through the outer surface of the inner support rod (3).

3. The positioning fixture for processing automobile hollow metal tubes according to claim 2, characterized in that: An unlocking ring (16) is provided on one side of the connecting rod (7), and an adsorption magnet (17) is fixedly provided on the outer surface of the unlocking ring (16) on one side facing the connecting rod (7).

4. The positioning fixture for processing a hollow metal tube for automobiles according to claim 2, characterized in that: The connecting tube (1) is of hollow design, and the mounting plate (2) is of an annular design with a hole in the middle, the inner support rod (3) and the mounting plate (2) are connected by sliding friction, and one end of the inner support rod (3) located outside the mounting plate (2) is of arc design, and the contact block (4) is a columnar protrusion made of rubber material, and the contact blocks (4) are evenly distributed on the outer surface of the inner support rod (3).

5. The positioning fixture for processing a hollow metal tube for automobiles according to claim 2, characterized in that: The end of the closed tail rod (5) away from the mounting plate (2) is of closed design, and the connecting top rod (6) and the connecting rod (7) are threadedly connected.

6. The positioning fixture for processing a hollow metal tube for automobiles according to claim 2, characterized in that: One end of the pressure chamber (9) passes through the inner surface of the central hole of the mounting plate (2), and a one-way valve (10) is fixedly installed on the one end of the pressure chamber (9) passing through the inner surface of the central hole of the mounting plate (2). The sliding rod (11) is of an arc-shaped columnar design, and the sliding rod (11) and the mounting plate (2) are connected by sliding friction. One end of the sliding rod (11) passes through the inner surface of the pressure chamber (9), and a spring is connected between one end of the sliding rod (11) and the inner surface of the pressure chamber (9).

7. The positioning fixture for processing a hollow metal tube for automobiles according to claim 2, characterized in that: The closing plate (12) and the mounting plate (2) are connected by sliding friction, a spring is connected between the adsorption block (13) and the mounting plate (2), and one end of the closing plate (12) passes through the pressure chamber (9) and faces the outside of the mounting plate (2).

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