Hydraulic three jaw internal bore device

Abstract

The utility model discloses a hydraulic three claw props inner hole device, include: chuck base, support rod, fixed disc, first pin, second pin, chuck base is provided with a plurality of base through -hole, and chuck base is provided with first connecting lug at inside end portion, and first connecting lug is provided with first hinged hole, support rod rear end is provided with support rod through -hole, and first pin is installed in support rod through -hole, first hinged hole, support rod bottom is provided with second connecting lug, and second connecting lug is provided with second hinged hole, fixed disc is provided with three hinged openings, and hinged opening is provided with third hinged hole, and the second connecting lug of three support rods is installed in three hinged openings respectively, and second pin is installed in third hinged hole, second hinged hole. The utility model has solved the problem of short stroke of the existing hydraulic three claw.

Description

Technical Field

[0001] This utility model belongs to the field of CNC horizontal lathe technology, specifically relating to a hydraulic three-jaw support device for the inner hole. Background Technology

[0002] The main operating method of the hydraulic three-jaw clamping device on existing CNC horizontal lathes is as follows: Before machining the workpiece, the workpiece clamping area of ​​the three jaws needs to be precision machined on the machine tool to ensure that the three jaws are circular and slightly smaller than the inner diameter of the workpiece; the position of the three jaws is manually adjusted according to the inner diameter of the workpiece so that the clamping diameter of the three jaws is slightly smaller than the inner diameter of the inner diameter (the diameter of the three jaws is manually adjusted according to the inner diameter of the workpiece so that it is 3-5mm smaller than the inner diameter of the inner diameter). Then the three jaws are fixed on the hydraulic slide, which is placed in the chuck and can be hydraulically controlled to move the three jaws. The movement of the hydraulic slide is controlled by the hydraulic system. When the CNC program controls the three jaws to shrink and enter the inner hole, the three jaws and the hydraulic slide move outward synchronously under the program control to clamp the workpiece, realizing the clamping action of the three jaws.

[0003] When the CNC program controls the hydraulic three-jaw chuck to shrink and enter the inner hole of the workpiece, the hydraulic three-jaw chuck moves outward synchronously under program control to clamp the workpiece. Typically, the travel stroke of the hydraulic three-jaw chuck is only about 10mm (diameter direction). This amount of movement is sufficient for supporting through holes, but because of the limited adjustment distance, a set of three-jaw chucks is required for clamping each type of workpiece (taking supporting an inner hole as an example) in actual production. This results in the need for a large number of three-jaw chucks when producing small batches of diverse workpieces. For cases where the opening is small but the inner hole is more than 10mm larger than the opening on one side and requires internal support for a large hole, existing hydraulic three-jaw chucks cannot be used due to their travel limitations. Utility Model Content

[0004] The purpose of this invention is to provide a hydraulic three-jaw jack device for supporting the inner hole, which solves the problem of short stroke in existing hydraulic three-jaw jacks.

[0005] To achieve the above objectives, the technical solution used in this utility model is as follows: The hydraulic three-jaw chuck internal hole device includes: a chuck base, a support rod, a fixed plate, a first pin, and a second pin; the chuck base is provided with multiple base through holes, and the chuck base is provided with a first connecting lug at its inner end, the first connecting lug being provided with a first hinge hole; the rear end of the support rod is provided with a support rod through hole, and the first pin is installed in the support rod through hole and the first hinge hole; the bottom of the support rod is provided with a second connecting lug, the second connecting lug being provided with a second hinge hole; the fixed plate is provided with three hinge openings, the hinge openings being provided with a third hinge hole, the second connecting lugs of the three support rods are respectively installed in the three hinge openings, and the second pins are installed in the third hinge hole and the second hinge hole.

[0006] Furthermore, the front end of the support rod is provided with a bent end.

[0007] Furthermore, the three hinged openings are arranged in a triangular pattern.

[0008] Furthermore, a screw is installed inside the through hole of the base, and the screw passes through the through hole of the base and is connected to the hydraulic slider.

[0009] The technical effects of this utility model include: 1. This utility model solves the problem of short stroke in existing hydraulic three-jaw chucks.

[0010] 2. This utility model solves the clamping problem of workpieces with larger inner holes and smaller outer holes that require clamping inner holes.

[0011] 3. The hydraulic three-jaw chuck inner hole support device of this utility model uses the lever principle and the three-jaw hydraulic chuck under the program control of the CNC horizontal lathe to make the chuck base perform limited displacement to retract or expand the front end of the support rod.

[0012] When the chuck base moves outward, the lever end retracts, making it easier to insert into the inner hole of the pipe / cylinder. When it reaches the predetermined position, the chuck base moves inward, and the front end of the support rod that serves as the lever end expands outward to clamp the inner hole of the pipe / cylinder.

[0013] The fixed plate serves as the fulcrum in the lever principle, while the limited displacement of the chuck base (not exceeding 10mm) amplifies the displacement of the lever end and serves as the force-bearing point.

[0014] The displacement is adjusted by the ratio of the distance between the two points and the fulcrum, thereby avoiding the small diameter of the pipe / cylinder opening and clamping the inner diameter of the pipe / cylinder, which facilitates clamping the inner wall of the cylinder.

[0015] 4. During processing, this utility model can clamp both ends of the workpiece, which solves the problem of unified reference, saves the time of manual workpiece alignment, and expands the processing position of the CNC lathe for the workpiece. Attached Figure Description

[0016] Figure 1 This is an exploded view of the hydraulic three-jaw support inner hole device in this utility model; Figure 2 This is a diagram showing the usage state of the hydraulic three-claw support inner hole device in this utility model. Detailed Implementation

[0017] The following description fully illustrates specific embodiments of the present invention to enable those skilled in the art to practice and reproduce it.

[0018] like Figure 1 The figure shown is an exploded view of the hydraulic three-claw support inner hole device in this utility model.

[0019] The hydraulic three-jaw chuck inner hole device, fixed on the hydraulic slider of the hydraulic chuck 6, includes: a chuck base 1, a support rod 2, a fixed plate 3, a first pin 4, and a second pin 5. The chuck base 1 is provided with multiple base through holes 11, and screws are inserted into the base through holes 11. The chuck base 1 is provided with a first connecting lug 12 at its inner end, and the first connecting lug 12 is provided with a first hinge hole 13. The rear end of the support rod 2 is provided with a support rod through hole 21, and the first pin 4 is installed in the support rod through hole 21 and the first hinge hole 13, hinged to the rear end of the support rod 2 onto the first connecting lug 12. The bottom of the support rod 2 is provided with a second connecting lug 22, and the second connecting lug 22 is provided with a second hinge hole 23. The front end of the support rod 2 is bent outward to form a bent end.

[0020] The fixed plate 3 is provided with three hinge openings, and the hinge openings are provided with third hinge holes 31. Three second connecting ears 22 are respectively installed in the three hinge openings. The second pin 5 is installed in the third hinge hole 31 and the second hinge hole 23 to hinge the lower part of the support rod 2 to the fixed plate 3.

[0021] The three hinge openings are arranged in a triangle. Screws pass through the base through-hole 11 and are connected to the hydraulic slider.

[0022] The support rod 2 forms a lever shape with the second connecting ear 22 as the fulcrum. As the hydraulic chuck moves, it drives the chuck base 1 to move. The bent end of the front end of the support rod 2 can retract inward or expand outward to position the inner wall of the pipe.

[0023] This utility model is mainly suitable for pipe processing, and can directly process the end face of the workpiece or the welding bevel at the end face, greatly reducing the number of three-jaw jacks required.

[0024] like Figure 2 The diagram shown is a usage state diagram of the hydraulic three-claw support inner hole device in this utility model.

[0025] The specific steps for using the hydraulic three-jaw jack internal hole device are as follows: Step 1: Install three chuck bases 1 on the hydraulic sliders of the hydraulic chucks 6 on both sides of the CNC horizontal lathe. Screws pass through the through holes 11 of the bases and are connected to the hydraulic sliders. The support rod 2 is hinged to the first connecting ear 12 by the first pin 4. The second pin 5 is installed in the third hinge hole 31 and the second hinge hole 23 to hinge the lower part of the support rod 2 to the fixed plate 3. Step 2: Insert the three support rods 2 into the cylinder 7 through the piston rod through hole of the cylinder 7. Operate the CNC horizontal lathe, and the hydraulic slide will push the three chuck bases 1 to move inward. The chuck bases 1 will move inward, and the front ends of the three support rods 2 will open and the bent ends will abut against the inner wall of the cylinder 7, thus completing the fixation of both ends of the cylinder 7. To accommodate the structure of cylinder 7, the rear end cap of cylinder 7 is removed. Since the front end of cylinder 3 is provided with a piston rod through hole, the piston rod extends out from the piston rod through hole. The rear end of cylinder 7 is provided with an end cap for hinged to the frame.

[0026] Operating the CNC horizontal lathe, the hydraulic chuck 6 drives the three chuck bases 1 to move outward, the bent ends of the three support rods 2 are retracted, and then the three support rods 2 are placed into the pipe / cylinder.

[0027] Step 3: Install the jaws on the hydraulic slide block. Insert the jaws into the cylinder 3 from the rear end of the cylinder 3. Operate the CNC horizontal lathe, and the hydraulic slide block will drive the jaws to clamp the inner wall of the cylinder 3.

[0028] Alternatively, the jaws of an existing hydraulic chuck 6 (selecting a hydraulic three-jaw chuck) can be used. The hydraulic chuck 6 has three hydraulic sliders inside. The jaws of the hydraulic chuck 6 clamp onto the inner wall of the cylinder 7 from the rear end of the cylinder 7. The jaws are connected to the hydraulic sliders.

[0029] Subsequently, the CNC horizontal lathe can be used to process the cylinder 7. The external turning tool on the turret can be used to process the outer circle of the workpiece (cylinder). The turret turning tool can also be used to process the end face, external hole and internal groove of the workpiece, which greatly expands the processing position of the workpiece.

[0030] The terminology used in this invention is descriptive and exemplary, and not restrictive. Since this invention can be embodied in various forms without departing from the spirit or essence of the technical solution, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A hydraulic three-jaw support inner hole device, characterized in that, include: The chuck base comprises a support rod, a fixed plate, a first pin, and a second pin. The chuck base has multiple base through holes, and a first connecting lug with a first hinge hole is provided at the inner end of the chuck base. The support rod has a support rod through hole at its rear end, and the first pin is installed in the support rod through hole and the first hinge hole. The support rod has a second connecting lug with a second hinge hole at its bottom. The fixed plate has three hinge openings with a third hinge hole. The second connecting lugs of the three support rods are respectively installed in the three hinge openings, and the second pins are installed in the third hinge hole and the second hinge hole.

2. The hydraulic three-jaw jack internal hole device as described in claim 1, characterized in that, The front end of the support rod is provided with a bent end.

3. The hydraulic three-jaw jack internal hole device as described in claim 1, characterized in that, The three hinged openings are arranged in a triangle.

4. The hydraulic three-jaw jack internal hole device as described in claim 1, characterized in that, A screw is installed inside the through hole of the base, and the screw passes through the through hole of the base and is connected to the hydraulic slider.

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