Hydraulic clamp for high-pressure shell part

Abstract

The utility model belongs to the field of automobile part machining, and particularly relates to a hydraulic clamp for a high-pressure shell part, which comprises a clamp body, three equal-height main positioning support seats mounted on the clamp body, and two pull cylinders mounted on the clamp body and respectively connected with positioning pin seats at the upper part through embedded conical positioning pins, the main positioning supporting seat is installed on the clamp body, the auxiliary supporting oil cylinder is installed on the clamp body, a small plane of the main positioning supporting seat is provided with an airtight detection hole, a plurality of clamping oil cylinders are installed on the clamp body in a distributed mode, the pressing plates are correspondingly installed on the clamping oil cylinders, and three hydraulic control one-way valves and a hydraulic pressure gauge are installed on the clamp body and used for maintaining pressure. According to the OP10 machining fixture, it can be guaranteed that machining of all faces and holes and machining of part of side faces and holes on a large face are completed in OP10 first-order machining, unification of rough datum holes and fine datum holes before and after machining is achieved through the fixture, machining efficiency is improved, and meanwhile the influence of the machined faces and holes on the size of a blank caused by the blank is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of automobile parts processing, concretely relates to a high pressure shell part hydraulic fixture. BACKGROUND

[0002] The production and processing of automobile high pressure shell parts are generally processed in sequence, according to the difference of products, the process is generally milled, and the process of milling is processed on four or five axis machining center machine tool using hydraulic fixture because of the angle difference of processing surface and hole.

[0003] In the five axis machine tool, because the high pressure shell part needs two sequence processing, the positioning reference hole in the first sequence OP10 processing needs to be processed after the fixture positioning pin is retracted after the workpiece is positioned and clamped, as the fine positioning hole of the second sequence OP20, therefore, a set of special positioning pin fixture that is blank positioning and processing hole is needed to ensure the fine positioning of the workpiece in the OP10 processing in the subsequent process OP20. UTILITY MODEL CONTENT

[0004] The utility model provides a high pressure shell part hydraulic fixture to solve the problem that the machining precision of other surface and hole is difficult to guarantee after the second sequence positioning in the prior art.

[0005] To achieve the above purpose, the utility model provides the technical scheme as follows:

[0006] A high pressure shell part hydraulic fixture, comprising a fixture body, a positioning mechanism and a clamping mechanism;

[0007] The positioning mechanism comprises a positioning support seat, a hole positioning pin seat, a conical positioning pin and a cylinder puller, the positioning support seat, the hole positioning pin seat and the cylinder puller are arranged on the fixture body, the hole positioning pin seat and the conical positioning pin are gap matched, and the conical positioning pin is connected with the cylinder puller.

[0008] The clamping mechanism comprises a main clamping oil cylinder, an auxiliary clamping oil cylinder, a main pressing plate and an auxiliary pressing plate, the main clamping oil cylinder and the auxiliary clamping oil cylinder are installed on the fixture body, and the main pressing plate and the auxiliary pressing plate are arranged on the main clamping oil cylinder and the auxiliary clamping oil cylinder respectively.

[0009] Preferably, the positioning support seat is provided with a gas-tight detection hole.

[0010] Preferably, the utility model further comprises a hydraulic auxiliary support cylinder, and the hydraulic auxiliary support cylinder is installed on the fixture body.

[0011] Preferably, the utility model further comprises an auxiliary support seat, and the hydraulic auxiliary support cylinder is installed on the plane of the fixture body through the auxiliary support seat.

[0012] Preferably, the hydraulic clamp further comprises a hydraulic control check valve, which is installed on the clamp body and connected with the main clamping oil cylinder, the auxiliary clamping oil cylinder and the hydraulic auxiliary supporting cylinder.

[0013] Preferably, the hydraulic clamp further comprises a speed regulating valve, and the pull cylinder is connected with the conical positioning pin through the speed regulating valve.

[0014] Preferably, the hydraulic clamp further comprises an oil pressure gauge, which is arranged on the clamp body.

[0015] Preferably, the clamp body is provided with oil passage holes and air passage holes.

[0016] The hydraulic clamp has the advantages that:

[0017] The utility model provides a kind of high-pressure shell piece hydraulic clamp, including the positioning support seat of determining plane, the hole positioning pin seat of making workpiece main positioning and angular positioning, conical positioning pin and pull cylinder, and the clamping oil cylinder for clamping workpiece, the rough positioning hole of workpiece is positioned after positioning clamping, positioning pin is withdrawn after giving way, to process hole as the fine positioning hole of subsequent process.

[0018] The utility model can ensure that all surfaces and holes on the large surface are machined and part of the side surface and hole is machined in OP10 sequence machining, the clamp realizes the unity of coarse reference hole and fine reference hole before and after machining, improves machining efficiency, and reduces the influence of machining surface and hole on rough size caused by roughness. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings accompanying the specification provide further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0020] Figure 1 Front view of the hydraulic clamp of the utility model;

[0021] Figure 2 Plan view of the hydraulic clamp of the utility model;

[0022] Figure 3 Left view of the hydraulic clamp of the utility model;

[0023] Figure 4 Perspective view of a high-pressure shell piece shell machined by the utility model;

[0024] Figure 5 Perspective view of the positioning support seat with air tightness detection;

[0025] Figure 6 Perspective view of another deformation example of the positioning support seat with air tightness detection. DETAILED DESCRIPTION

[0026] The utility model will be explained in detail below with reference to the drawings and in combination with the embodiments. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0027] The following detailed description is exemplary description, and aims at providing further detailed description of the utility model. Unless otherwise specified, all the technical terms adopted in the utility model are the same as the meanings commonly understood by the general technical personnel in the field to which the utility model belongs. The terms adopted in the utility model are only for describing the specific embodiments, and are not intended to limit the exemplary embodiments according to the utility model.

[0028] Please refer to Figure 1 、 2 , 3, the utility model provides a kind of high-pressure shell piece hydraulic clamp, including clamping body 1, positioning mechanism, clamping mechanism and auxiliary mechanism.

[0029] The positioning mechanism includes three equal-height positioning support seats 2, two hole positioning pin seats 3 embedded with tapered positioning pins 4 with tapered portions, and a pull cylinder 5 installed inside the clamping body 1.

[0030] The hole positioning pin seat 3 is installed on the clamping body 1 and gap-fitted with the tapered positioning pin 4. The tapered positioning pin 4 is connected with the pull cylinder 5 through a screw, so that the tapered positioning pin 4 can move up and down with the pull cylinder 5. When installing the workpiece, the tapered portion of the tapered positioning pin 4 is always in contact with the shell positioning orifice of the high-pressure shell piece, which can ensure accurate positioning by adjusting the height of the positioning pin 4 through the spring in the pull cylinder 5 for the workpiece with a positioning hole diameter and depth difference within 2mm. After the clamp oil cylinder clamps the workpiece, the pull cylinder 5 moves downward under oil pressure to pull the positioning pin 4 out of the workpiece orifice.

[0031] The clamping mechanism includes three main clamping oil cylinders 6, three auxiliary clamping oil cylinders 7, three main pressure plates 8, and three auxiliary pressure plates 9.

[0032] The main clamping oil cylinder 6 and the auxiliary clamping oil cylinder 7 are distributed and installed on the clamping body 1. The main pressure plate 8 and the auxiliary pressure plate are respectively installed on the corresponding main clamping oil cylinder 6 and auxiliary clamping oil cylinder 7. Each oil cylinder drives the corresponding pressure plate to apply pressure to the corresponding part of the workpiece to press the workpiece.

[0033] The auxiliary mechanism includes an auxiliary support seat 14, a plurality of hydraulic auxiliary support cylinders 11, a speed regulating valve 10, a hydraulic control one-way valve 12, and an oil pressure gauge 13.

[0034] The hydraulic auxiliary support cylinder 11 has five, three of which are directly installed on the clamping body 1, and the other two are installed on the clamping body 1 through the auxiliary support seat 14.

[0035] The hydraulic control one-way valve 12 is installed on the clamping body 1 and is connected in series with the main clamping oil path, the auxiliary support oil path and the auxiliary clamping oil path respectively, so as to ensure that the clamping force of the workpiece by the hydraulic cylinder is not affected by the pressure fluctuation of the hydraulic oil path in the clamping state of the workpiece.

[0036] The utility model follows the six-point positioning principle, and the workpiece is determined as a plane through three equidistant positioning support seats 2 installed on the clamping body 1, and the hole positioning pin seat 3 and the conical positioning pin 4 with a taper are connected with the pull cylinder 5 through a screw to realize the main positioning and angular positioning of the workpiece. When the workpiece is clamped, the main clamping oil cylinder 6 is first supplied with hydraulic oil to clamp, then the hydraulic auxiliary support cylinder 11 is supplied with hydraulic oil to complete the auxiliary support, and then the three auxiliary clamping oil cylinders 7 are supplied with hydraulic oil to press the workpiece, wherein two auxiliary support cylinders do not have corresponding auxiliary clamping cylinders, as shown in the specific embodiment. Figure 4

[0037] In an embodiment, the clamping body 1 is provided with a speed regulating valve 10, and the pull cylinder 5 controls the lifting and retraction speed of the conical positioning pin 4 through the speed regulating valve 10.

[0038] In an embodiment, the clamping body 1 is provided with an oil pressure gauge 13, and the oil pressure gauge 13 is used to record the oil pressure.

[0039] In an embodiment, the plane of the positioning support seat 2 is provided with an air tightness detection hole 15 for detecting whether the workpiece is installed in place, whether the clamping oil cylinder 6 is clamped and whether the pressing plate 8 is pressed in place. If not, the air tightness detection alarm will be triggered due to air leakage to ensure the correct installation of the workpiece, as shown in the specific embodiment. Figure 5 、 6

[0040] In the utility model, the clamping body 1 is connected with the machine tool workbench surface, and the clamping body 1 has oil path holes and gas path holes. The oil path holes and the gas path holes are connected with the oil path holes and the gas path holes on the machine tool workbench surface, so that the hydraulic oil and the air tightness detection hole can be smoothly connected and sealed. The hydraulic clamp is fixed on the workbench through the mounting bolt. The clamping body 1 can use forged high-quality steel materials to meet the production needs through reasonable machining process, heat treatment process, surface treatment process and the like.

[0041] After the workpiece is machined, the main clamping oil cylinder and the auxiliary clamping oil cylinder and the auxiliary support cylinder are loosened through the hydraulic oil path, so that the machined workpiece can be taken down and the next workpiece can be installed.

[0042] ​​The two blank positioning holes of the workpiece are retreated to give way after positioning and clamping, and are used for processing holes as the fine positioning holes of the subsequent process, so that all surfaces and holes and part of side surfaces and holes on a large surface can be processed in OP10 one sequence processing, the fixture realizes the unity of the coarse reference hole and the fine reference hole before and after processing, the processing efficiency is improved, and the influence of the relative blank size of the processed surface and hole caused by the blank is reduced.

[0043] It is to be understood by those skilled in the art that the present application can be implemented by other embodiments without departing from the spirit or essential characteristics thereof. Therefore, the above disclosed embodiments are merely illustrative in all aspects and are not the only ones. All changes within the scope of the present application or within the scope equivalent to the present application are included in the present application.

[0044] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, but not to limit it. Although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced, and any modification or equivalent replacement without departing from the spirit and scope of the present application should be covered within the protection scope of the claims of the present application.

Claims

1. A high pressure housing piece hydraulic clamp characterized by, The clamp body, the positioning mechanism and the clamping mechanism are included; The positioning mechanism includes a positioning support seat, a hole positioning pin seat, a conical positioning pin and a pull cylinder; the positioning support seat, the hole positioning pin seat and the pull cylinder are arranged on the clamp body, the hole positioning pin seat is in clearance fit with the conical positioning pin, and the conical positioning pin is connected with the pull cylinder; The clamping mechanism includes a main clamping oil cylinder, an auxiliary clamping oil cylinder, a main pressing plate and an auxiliary pressing plate; the main clamping oil cylinder and the auxiliary clamping oil cylinder are installed on the clamp body, and the main pressing plate and the auxiliary pressing plate are arranged on the main clamping oil cylinder and the auxiliary clamping oil cylinder respectively.

2. A hydraulic fixture for high pressure shell sections as claimed in claim 1, characterized in that The positioning support seat is provided with an air tightness detection hole.

3. A hydraulic fixture for high pressure shell sections as defined in claim 1, characterized in that The clamp body is further provided with a hydraulic auxiliary support cylinder.

4. A hydraulic fixture for high pressure shell sections as defined in claim 3, characterized in that The clamp body is further provided with an auxiliary support seat.

5. A hydraulic fixture for high pressure shell sections as defined in claim 3, wherein The clamp body is further provided with a hydraulic auxiliary support cylinder.

6. A hydraulic fixture for high pressure shell sections as defined in claim 1, characterized in that The clamp body is further provided with a hydraulic auxiliary support cylinder.

7. A hydraulic fixture for high pressure shell sections as defined in claim 1, wherein The clamp body is further provided with a hydraulic auxiliary support cylinder.

8. A hydraulic fixture for high pressure shell sections as defined in claim 1, characterized in that The clamp body is further provided with an oil pressure gauge. The clamp body is provided with an oil passage hole and an air passage hole.

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