Hydraulic clamp for finish machining of exhaust pipe

Abstract

The utility model discloses a hydraulic clamp for finish machining of an exhaust pipe, which comprises a bottom plate, a first clamping component for fixing a main flange of the exhaust pipe and a plurality of second clamping components for fixing branch flanges, the first clamping assembly comprises a first limiting device located on one side of the main flange, a side pressing device located on the other side of the main flange, a first supporting device located below the main flange and a first jacking device located on the rear side of the first supporting device. The first limiting device and the side pressing device clamp the left side and the right side of the main flange. The first supporting device and the first jacking device clamp the upper side and the lower side of the main flange; the second clamping assembly comprises a second limiting device located on the rear side of the branch flange, a second supporting device located below the branch flange and a second jacking device located beside the branch flange. According to the exhaust pipe fixing device, the exhaust pipe is fixed, time and labor are saved, the clamping efficiency is high, and safety accidents can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of exhaust pipe processing accessories, especially to a hydraulic fixture for exhaust pipe finishing. BACKGROUND

[0002] The basic structure of the existing automobile engine exhaust pipe is shown in the figure, including a main exhaust port 11 and a plurality of branch exhaust ports 12, the pipe opening of the main exhaust port 11 is provided with a main flange 13, and the pipe opening of each branch exhaust port 12 is provided with a branch flange 14. Figure 1 The current production method of the exhaust pipe 10 is to use the pouring method, demold after forming, then clamp and fix the blank on the fixture of the machine tool, and then perform finishing machining (such as polishing of the flash part, polishing of the burr part, polishing of the pipe opening notch part, flange drilling, etc.) on the blank by the machine tool.

[0003] The existing clamping and fixing process usually places the exhaust pipe 10 on the tool fixture first, limits the exhaust pipe through screws and supporting components, and then clamps the exhaust pipe through the lower pressing component. The whole process is completed by manual operation, which is low in efficiency. Since some installation positions are far away from the operator, the operator needs to enter the machine tool to install, which has safety hazards. In addition, when the exhaust pipe 10 has a large number of pipe openings, it is necessary to clamp each pipe opening one by one, which makes it difficult to ensure the clamping time. At the same time, when manually clamping, it is difficult to grasp the clamping force of each pipe opening by the lower pressing component, and the exhaust pipe 10 is prone to circumferential deflection and deformation, which affects the positioning accuracy of the machine tool. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a hydraulic fixture for exhaust pipe finishing.

[0005] The utility model is innovative in that it fixes the exhaust pipe, saves time and effort, improves clamping efficiency, avoids safety accidents, adjusts the pressing force by controlling the flow valve to change the flow of hydraulic oil, ensures the uniformity of the clamping force of each flange, avoids circumferential deflection and deformation of the exhaust pipe, and also ensures the positioning accuracy of the machine tool during machining.

[0006] To achieve the above utility model purposes, the technical scheme of the utility model is as follows:

[0007] A hydraulic fixture for exhaust pipe finishing, comprising a base plate, a first clamping assembly for fixing the main flange of the main exhaust port of the exhaust pipe, and a plurality of second clamping assemblies for fixing the branch flanges of the branch exhaust ports.

[0008] The first clamping assembly comprises a first limiting device on one side of the main flange, a side pressing device on the other side, a first supporting device below the main flange, and a first top pressing device on the rear side of the first supporting device; the first limiting device and the side pressing device clamp the left and right sides of the main flange; the first supporting device and the first top pressing device clamp the upper and lower sides of the main flange;

[0009] The second clamping assembly comprises a second limiting device on the rear side of the branch flange, a second supporting device below the branch flange, and a second top pressing device on the side of the branch flange; the second supporting device and the second top pressing device clamp the upper and lower sides of the branch flange, and the second limiting device abuts against the rear side of the branch flange;

[0010] The side pressing device comprises a side pressing base, a first hydraulic cylinder arranged on the side pressing base, the first hydraulic cylinder is a thin hydraulic cylinder, and a limiting rod is arranged at the free end of the first hydraulic cylinder;

[0011] The first top pressing device and the second top pressing device are the same in structure and comprise a top pressing base and a second hydraulic cylinder arranged on the top pressing base, the second hydraulic cylinder is a lever type hydraulic cylinder, and a pressing plate is arranged at the free end of the second hydraulic cylinder;

[0012] An oil supply pipeline is arranged at the bottom of the bottom plate, and the oil supply pipeline is connected with the first hydraulic cylinder and the second hydraulic cylinder.

[0013] Further, the first limiting device and the second limiting device are the same in structure and comprise a vertical plate and a limiting screw arranged on the vertical plate, and the limiting screw is threadedly connected with the vertical plate.

[0014] Further, the first supporting device comprises a supporting base and a first stud arranged at the top of the supporting base, and the first stud is obliquely connected with the base.

[0015] Further, the second supporting device is a second stud, and the second stud is threadedly connected with the bottom plate.

[0016] Further, a flow valve is further arranged on the oil supply pipeline.

[0017] Further, a guide base is further arranged on one side of the side pressing base, and the free end of the limiting rod passes through a guide hole at the top of the guide base.

[0018] The beneficial effects of the utility model are as follows:

[0019] First, the first clamping assembly and the second clamping assembly are used to fix the exhaust pipe, time and labor are saved, the clamping efficiency can be improved, and safety accidents can be avoided.

[0020] Second: by controlling the flow valve to change the flow of hydraulic oil to adjust the pressing force, ensure that the size of each flange clamping force is uniform, avoid the exhaust pipe from circumferential deflection and deformation, also can ensure the positioning accuracy when the machine tool is processed. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is structural schematic view of exhaust pipe.

[0022] Figure 2 It is front perspective view of the utility model.

[0023] Figure 3 It is rear perspective view of the utility model.

[0024] Figure 4 It is front perspective view of fixed exhaust pipe of the utility model.

[0025] Figure 5 It is side perspective view of fixed exhaust pipe of the utility model.

[0026] Figure 6 It is rear perspective view of fixed exhaust pipe of the utility model.

[0027] In the drawing: 10 is exhaust pipe, 11 is main exhaust port, 12 is branch exhaust port, 13 is main flange, 14 is branch flange, 20 is bottom plate, 30 is first clamping assembly, 31 is first limiting device, 32 is side pressure device, 32.1 is side pressure base, 32.2 is first hydraulic cylinder, 32.3 is limiting rod, 33 is first supporting device, 33.1 is supporting base, 33.2 is first stud, 34 is first top pressure device, 35 is guide base, 40 is second clamping assembly, 41 is second limiting device, 42 is second supporting device, 43 is second top pressure device, 34a, 43a are top pressure base, 34b, 43b are second hydraulic cylinder, 34c, 43c are pressing plate, 31a, 41a are vertical plate, 31b, 41b are limiting screw, 50 is flow valve. DETAILED DESCRIPTION

[0028] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings.

[0029] A kind of hydraulic fixture for exhaust pipe finish machining, including bottom plate 20, still include the first clamping assembly 30 of fixed exhaust pipe 10 main exhaust port place main flange 13 and several second clamping assemblies 40 of fixed branch exhaust port place branch flange 14;

[0030] (Reference Figure 4 , 5, 6) the first clamping assembly 30 comprises a first limiting device 31 on one side of the main flange 13, a side pressing device 32 on the other side, a first supporting device 33 below the main flange 13 and a first pressing device 34 behind the first supporting device 33; the first limiting device 31 and the side pressing device 32 clamp the left and right sides of the main flange 13; the first supporting device 33 and the first pressing device 34 clamp the upper and lower sides of the main flange 13;

[0031] (Reference Figure 4 、 5 , 6) the second clamping assembly 40 comprises a second limiting device 41 behind the branch flange 14, a second supporting device 42 below the branch flange 14 and a second pressing device 43 beside the branch flange 14; the second supporting device 42 and the second pressing device 43 clamp the upper and lower sides of the branch flange 14, and the second limiting device 41 abuts against the rear side of the branch flange 14;

[0032] (Reference Figure 2 ) the side pressing device 32 comprises a side pressing base 32.1, a first hydraulic cylinder 32.2 arranged on the side pressing base 32.1, the first hydraulic cylinder 32.2 being a thin hydraulic cylinder, and a limiting rod 32.3 arranged at the free end of the first hydraulic cylinder 32.2;

[0033] The first pressing device 34 and the second pressing device 43 are the same in structure, comprising a pressing base 34a, 43a, a second hydraulic cylinder 34b, 43b arranged on the pressing base 34a, 43a, the second hydraulic cylinder 34b, 43b being a lever hydraulic cylinder, and a pressing plate 34c, 43c arranged at the free end of the second hydraulic cylinder 34b, 43b;

[0034] The bottom of the bottom plate 20 is provided with an oil supply pipeline (not shown in the figure), which is connected with the first hydraulic cylinder 32.2 and the second hydraulic cylinder 34b, 43b; the oil supply pipeline is a prior art, which will not be described here.

[0035] Further, the first pressing device 34 can be clamped at the forked mouth of the exhaust pipe 10 when arranged (Reference Figure 6 ).

[0036] Further, the first limiting device 31 and the second limiting device 41 are the same in structure, comprising a vertical plate 31a, 41a and a limiting screw 31b, 41b arranged on the vertical plate 31a, 41a, the limiting screw 31b, 41b being connected with the vertical plate 31a, 41a by screw threads.

[0037] Further, the first supporting device 33 comprises a supporting base 33.1 and a first stud 33.2 arranged on the top of the supporting base 33.1, the first stud 33.2 is obliquely connected with the supporting base 33.1, and the first stud 33.2 is threadedly connected with the supporting base 33.1.

[0038] Further, the second supporting device 42 is a second stud, and the second stud is threadedly connected with the bottom plate 20.

[0039] Further, the oil supply pipeline is further provided with a flow valve 50.

[0040] Further, the side pressure base 32.1 is further provided with a guide base 35 on one side, and the free end of the limiting rod 32.3 passes through a guide hole on the top of the guide base 35.

[0041] The first clamping assembly 30 and the second clamping assembly 40 are used for fixing the exhaust pipe 10, time and labor are saved, the clamping efficiency is improved, and safety accidents can be avoided.

[0042] The flow valve 50 is controlled to change the flow of the hydraulic oil to adjust the pressing force, the size of the clamping force of each flange is uniform, the exhaust pipe 10 is prevented from being circumferentially deflected and deformed, and the positioning accuracy during machine tool machining can be ensured.

[0043] The described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

Claims

1. A hydraulic fixture for finishing an exhaust pipe, comprising a base plate, characterized in that: It also includes a first clamping assembly for fixing the main flange at the main exhaust port of the exhaust pipe and a plurality of second clamping assemblies for fixing the support flanges at the branch exhaust ports; The first clamping assembly includes a first limiting device located on one side of the main flange, a side pressure device located on the other side, a first supporting device located below the main flange, and a first pressing device located behind the first supporting device; the first limiting device and the side pressure device clamp the left and right sides of the main flange; the first supporting device and the first pressing device clamp the upper and lower sides of the main flange; The second clamping assembly includes a second limiting device located at the rear side of the support flange, a second supporting device located below the support flange, and a second pressing device located beside the support flange; the second supporting device and the second pressing device clamp the upper and lower sides of the support flange, and the second limiting device presses the rear side of the support flange; The side pressure device includes a side pressure base and a first hydraulic cylinder arranged on the side pressure base, wherein the first hydraulic cylinder is a thin hydraulic cylinder and a limit rod is arranged at the free end of the first hydraulic cylinder; The first pressing device and the second pressing device have the same structure, including a pressing base and a second hydraulic cylinder arranged on the pressing base, the second hydraulic cylinder is a lever-type hydraulic cylinder, and a pressing plate is arranged at the free end of the second hydraulic cylinder; An oil supply pipeline is provided at the bottom of the base plate, and the oil supply pipeline is connected to the first hydraulic cylinder and the second hydraulic cylinder.

2. The hydraulic clamp for exhaust pipe finishing according to claim 1, characterized in that: The first limiting device and the second limiting device have the same structure, including a vertical plate and a limiting screw arranged on the vertical plate, and the limiting screw is threadedly connected to the vertical plate.

3. The hydraulic clamp for exhaust pipe finishing according to claim 1, characterized in that: The first supporting device includes a supporting base and a first stud arranged on the top of the supporting base, and the first stud is obliquely connected to the base.

4. The hydraulic clamp for exhaust pipe finishing according to claim 1, characterized in that: The second supporting device is a second stud, and the second stud is threadedly connected to the base plate.

5. The hydraulic clamp for exhaust pipe finishing according to claim 1, characterized in that: A flow valve is also provided on the oil supply pipeline.

6. The hydraulic clamp for exhaust pipe finishing according to claim 1, characterized in that: A guide base is further provided on one side of the side pressure base, and the free end of the limiting rod passes through a guide hole on the top of the guide base.

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