Machining tool for bidirectional punching of oil cylinder body

Abstract

The utility model relates to the technical field of tool clamps, in particular to a machining tool for bi-directional punching of an oil cylinder body, which comprises a support, an abutting table arranged on the support in a telescopic mode and the oil cylinder body arranged on the support in a rotatable mode, and the abutting table abuts against the lower portion of the oil cylinder body. Two telescopic rods are installed on the support and located on the two sides of the abutting table, the two telescopic rods are oppositely arranged, abutting heads are arranged at the ends, facing the oil cylinder body, of the telescopic rods, the faces, facing the oil cylinder body, of the abutting heads are arc faces, and the arc faces abut against the outer circumferential face of the oil cylinder body. One end of the telescopic rod penetrates through the support and is slidably arranged in the support, the other end of the telescopic rod abuts against the telescopic part of the air cylinder, and meanwhile the telescopic rod is rotatably arranged in the support.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, and in particular to a machining tooling for bidirectional drilling of hydraulic cylinder bodies. Background Technology

[0002] Hydraulic cylinders are hydraulic actuators that convert hydraulic energy into mechanical energy, performing linear reciprocating motion (or oscillating motion). They are simple in structure and reliable in operation. Ensuring the fit between the cylinder body and the telescopic rod improves accuracy and service life. During cylinder body machining, due to the cylinder's considerable length, deep hole machining from one end is difficult and inaccurate. Typically, a 180° rotation is required. Common methods include disassembly and flipping, or using two drill bits for bidirectional machining. However, for surfaces with the same machining datum, flipping and reclamping changes the clamping position, causing the machining datum to shift and affecting accuracy. While bidirectional machining eliminates the flipping step and ensures accuracy, it requires an additional drilling setup, significantly increasing processing costs. For example, Chinese patent CN117359798A discloses a bidirectional drilling device, CNC equipment, and drilling method, including a worktable, a support table, a first drilling assembly, and a second drilling assembly. The worktable is equipped with a fixing table for fixing the workpiece to be drilled. The first drilling assembly includes a first drilling bracket, a first drilling drive module mounted on the first drilling bracket, a first drilling spindle, and a first spindle motor; one end of the first drilling spindle is connected to a first tool holder. The second drilling assembly includes a second drilling bracket, a second drilling drive module mounted on the second drilling bracket, a second drilling spindle, and a second spindle motor; one end of the second drilling spindle is connected to a second tool holder. This patent achieves bidirectional drilling through the coordinated work of the worktable, the first drilling assembly, and the second drilling assembly. However, it not only adds an extra drilling device, increasing processing costs, but also makes horizontal machining unstable for long cylinders.

[0003] Therefore, it is necessary for those skilled in the art to provide a machining fixture for bidirectional drilling of hydraulic cylinder bodies, which can stably provide 180° rotation when drilling parts in both directions, so as to ensure accurate positioning and unchanged clamping position, thereby improving machining accuracy. Utility Model Content

[0004] The purpose of this utility model is to provide a machining fixture for bidirectional drilling of hydraulic cylinder bodies, so as to solve the technical problems in the prior art where the hydraulic cylinder body is long, it is difficult to perform deep hole machining from one end alone, and bidirectional machining requires disassembly, which affects the machining accuracy.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a machining fixture for bidirectional drilling of a hydraulic cylinder body, used for drilling the hydraulic cylinder body. The machining fixture for bidirectional drilling of a hydraulic cylinder body includes a bracket and a telescopic abutment platform mounted on the bracket. The hydraulic cylinder body is rotatably mounted on the bracket. The abutment platform can abut against the bottom of the hydraulic cylinder body. Telescopic rods are installed on both sides of the abutment platform on the bracket. There are two telescopic rods arranged opposite each other. An abutment joint is provided on the end of the telescopic rod facing the hydraulic cylinder body. The surface of the abutment joint facing the hydraulic cylinder body is arc-shaped. The arc-shaped surface abuts against the outer circumferential surface of the hydraulic cylinder body. One end of the telescopic rod passes through the bracket and is slidably mounted inside the bracket. The other end of the telescopic rod abuts against the telescopic part of the cylinder. At the same time, the telescopic rod is rotatably mounted inside the bracket.

[0006] Furthermore, the bracket is rotatably provided with a rotating sleeve, which is detachably connected to the telescopic rod. The rotating sleeve and the telescopic rod are relatively fixed to each other, and the telescopic part of the cylinder is telescopically disposed inside the rotating sleeve and abuts against the telescopic rod.

[0007] Furthermore, the telescopic rod has a groove on its end face facing the cylinder, and the telescopic part of the cylinder is conical and abuts against the groove, with the telescopic part of the cylinder and the groove in point contact.

[0008] Furthermore, a rotating indexing plate is provided on the telescopic rod near the bracket, and a spring is provided between the rotating indexing plate and the rotating sleeve. A positioning protrusion is provided on the bracket near the rotating indexing plate. Multiple positioning protrusions are provided and evenly distributed around the axis of the telescopic rod. The rotating indexing plate is provided with a scale, and the scale is directly opposite the positioning protrusion.

[0009] Furthermore, the bracket has a square frame structure, the cylinder body is vertically mounted on the abutment platform on the bracket, and a drilling device is also provided above the bracket.

[0010] Furthermore, the abutment is made of plastic material, and a rubber pad is adhered to the arc surface of the abutment. The arc of the arc surface is consistent with the arc of the outer circumference of the cylinder body, and the rubber pad abuts against the cylinder body.

[0011] Furthermore, the lifting device includes a lead screw and a slider. The lead screw is rotatably mounted on the bracket, and the slider is threadedly connected to the lead screw. The slider is slidable relative to the bracket, and the abutment platform is fixedly mounted on the slider.

[0012] The beneficial effects of this utility model are as follows: This utility model has retractable abutment joints on both sides of the cylinder body to clamp the cylinder body. At the same time, the abutment joints can rotate, thereby achieving bidirectional drilling of the cylinder body while clamping, ensuring the accuracy of processing. Meanwhile, a retractable abutment platform is set at the bottom of the cylinder body to provide sufficient support during the processing of the cylinder body, ensuring the stability of processing. Attached Figure Description

[0013] Figure 1 This is a three-dimensional view of the machining fixture for bidirectional drilling of the cylinder body of the present invention.

[0014] Figure 2 This is the front view of the machining fixture for bidirectional drilling of the cylinder body of this utility model.

[0015] Figure 3 yes Figure 2 Sectional view along the middle AA.

[0016] Figure 4 yes Figure 3 A cross-sectional view along the middle BB.

[0017] Figure 5 This is an exploded view of the machining fixture for bidirectional drilling of the cylinder body of the present invention.

[0018] The components in the attached diagram are labeled as follows: 10, bracket; 11, telescopic rod; 12, rotating sleeve; 13, abutment joint; 14, rotating indexing plate; 15, lifting device; 16, groove; 17, positioning protrusion; 18, abutment platform; 20, hydraulic cylinder body. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0020] Please see Figure 1 This utility model provides a machining fixture for bidirectional drilling of a hydraulic cylinder body, used for drilling the hydraulic cylinder body 20. The machining fixture for bidirectional drilling of the hydraulic cylinder body includes a bracket 10 and a telescopic abutment 18 mounted on the bracket 10. The hydraulic cylinder body 20 is rotatably mounted on the bracket 10, and the abutment 18 can abut against the bottom of the hydraulic cylinder body 20 to provide support and thus ensure the stability of the machining.

[0021] The support 10 has a square frame structure. The cylinder body 20 is vertically mounted on the abutment platform 18 on the support 10. A drilling device (not shown in the figure) is also provided above the support 10, such as a radial drilling machine. By vertically mounting the cylinder body 20, the machining direction coincides with the machining reference, thereby ensuring that the drilling device can stably drill holes in the cylinder body 20. After drilling one end of the cylinder body 20, the cylinder body 20 is rotated 180° to drill the other end of the cylinder body 20, thus completing bidirectional drilling.

[0022] Further, please refer to Figure 2 , Figure 3 The bracket 10 has two telescopic rods 11 installed on both sides of the abutment platform 18. Each telescopic rod 11 has one end that passes through the bracket 10 and is slidably mounted within it. The other end of the telescopic rod 11 abuts against the telescopic part of a cylinder (not shown). The telescopic rod 11 and the telescopic part of the cylinder are separate components.

[0023] In this embodiment, the telescopic rod 11 has a groove 16 on its end face facing the cylinder. The telescopic part of the cylinder is conical and abuts against the groove 16. The telescopic part of the cylinder and the groove 16 are in point contact, thereby ensuring that the telescopic rod 11 can rotate relative to the telescopic part of the cylinder while the telescopic part of the cylinder pushes against the telescopic rod 11.

[0024] In another embodiment, a bearing is fixedly connected between the telescopic rod 11 and the telescopic part of the cylinder, so that the telescopic rod 11 can rotate relative to the telescopic part of the cylinder while being pushed.

[0025] The telescopic rod 11 has an abutment 13 on one end facing the cylinder body 20. The surface of the abutment 13 facing the cylinder body 20 is arc-shaped, and the arc of the arc surface is consistent with the arc of the outer circumferential surface of the cylinder body 20. The arc surface abuts against the outer circumferential surface of the cylinder body 20.

[0026] The abutment 13 is made of plastic material to ensure strength while preventing it from scratching the cylinder body 20. A rubber pad is also adhered to the arc surface of the abutment 13, which abuts against the cylinder body 20 to prevent scratches and further ensure the surface accuracy of the cylinder body 20.

[0027] Further, please refer to Figure 4 , Figure 5 The bracket 10 is rotatably provided with a rotating sleeve 12 by means of a bearing. The rotating sleeve 12 is detachably connected to the telescopic rod 11 by means of a pin. The rotating sleeve 12 and the telescopic rod 11 are relatively fixed. In use, the rotating sleeve 12 is manually rotated to drive the telescopic rod 11 to rotate 180° inside the bracket 10, thereby realizing the flipping of the cylinder body 20.

[0028] This invention features slidable abutment joints 13 on both sides of the cylinder body 20 to clamp the cylinder body 20. Simultaneously, the abutment joints 13 can rotate with the telescopic rod 11 and the rotating sleeve 12, thereby enabling the cylinder body 20 to be rotated while being clamped. This allows for bidirectional drilling of the cylinder body 20, ensuring machining accuracy.

[0029] Furthermore, the telescopic rod 11 is rotatably mounted inside the bracket 10. A rotating indexing plate 14 is provided on the telescopic rod 11 near the bracket 10. A spring (not shown) is provided between the rotating indexing plate 14 and the rotating sleeve 12 to ensure that the rotating indexing plate 14 can abut against the bracket 10. A positioning protrusion 17 is provided on the bracket 10 near the rotating indexing plate 14. Multiple positioning protrusions 17 are provided and evenly distributed around the axis of the telescopic rod 11. The rotating indexing plate 14 has graduations, which are aligned with the positioning protrusions 17, for visual confirmation of the rotation angle of the telescopic rod 11.

[0030] Furthermore, the telescopic part of the cylinder is telescopically disposed within the rotating sleeve 12 and abuts against the telescopic rod 11. In use, the telescopic part of the cylinder continuously abuts against the telescopic rod 11, thereby ensuring that the cylinder body 20 can maintain the same machining reference when rotating, ensuring the stability of clamping and the accuracy of machining. During machining, the cylinder body 20 is first clamped by the telescopic rod 11, then the rotating indexing plate 14 is fixedly connected to the telescopic rod 11, and finally the rotating sleeve 12 and the telescopic rod 11 are fixed to each other by a pin, thereby realizing the subsequent rotation process.

[0031] In another embodiment, the outer contour of one end of the telescopic rod 11 is rectangular, and the rotating sleeve 12 is sleeved on the end of the telescopic rod 11 with the rectangular contour. The inner wall of the rotating sleeve 12 and the outer wall of the telescopic rod 11 cooperate with each other. The rotating sleeve 12 is detachably connected to the telescopic rod 11 by fasteners such as bolts or screws, thereby ensuring the stability of the connection.

[0032] In this embodiment, the lifting device 15 includes a lead screw and a slider. The lead screw is rotatably mounted on the bracket 10, and the slider is threadedly connected to the lead screw and is slidable relative to the bracket 10. The abutment platform 18 is fixedly mounted on the slider. Thus, by rotating the lead screw, the slider and the abutment platform 18 on it are moved. The lifting device 15 provides support for the cylinder body 20 to ensure the stability of drilling. After drilling is completed at one end of the cylinder body 20, the lifting device 15 is driven to move, and then the cylinder body 20 is rotated, driving the lifting device 15 to move again, so that the lifting device 15 abuts against the cylinder body 20 again, ensuring the stability of drilling again.

[0033] In another embodiment, the lifting device 15 is a cylinder, and the abutment platform 18 is disposed on the telescopic part of the cylinder to abut against the cylinder body 20 and ensure the stability of drilling.

[0034] The specific operation method of this utility model is as follows: Step 1: Place the cylinder body 20 of the hydraulic cylinder on the abutment platform 18, drive the cylinder to abut the cylinder body 20 of the hydraulic cylinder, and fix the rotating indexing plate 14 and the rotating sleeve 12 to the telescopic rod 11 to complete the installation.

[0035] Step 2: Use a radial drilling machine to drill a hole at one end of the cylinder body 20.

[0036] Step 3: Manually rotate the rotating sleeve 12 to drive the telescopic rod 11 to rotate synchronously, completing a 180° flip.

[0037] Step 4: Use a radial drilling machine to drill a hole at the other end of the cylinder body 20 to complete bidirectional drilling.

[0038] This invention features retractable abutment joints 13 on both sides of the cylinder body 20 to clamp the cylinder body 20. The abutment joints 13 are rotatable, allowing for rotation while clamping, enabling bidirectional drilling of the cylinder body 20 and ensuring machining accuracy. Additionally, a retractable abutment platform 18 is provided at the bottom of the cylinder body 20 to provide sufficient support during machining, ensuring machining stability.

[0039] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A machining fixture for bidirectional drilling of a hydraulic cylinder body, used for drilling a hydraulic cylinder body (20), the machining fixture comprising a bracket (10) and a telescopically mounted abutment (18) on the bracket (10), the hydraulic cylinder body (20) being rotatably mounted on the bracket (10), the abutment (18) being able to abut against the underside of the hydraulic cylinder body (20), characterized in that, Telescopic rods (11) are installed on both sides of the abutment platform (18) on the bracket (10). There are two telescopic rods (11) arranged opposite each other. An abutment (13) is provided on one end of the telescopic rod (11) facing the cylinder body (20). The surface of the abutment (13) facing the cylinder body (20) is arc-shaped. The arc-shaped surface abuts against the outer circumferential surface of the cylinder body (20). One end of the telescopic rod (11) passes through the bracket (10) and is slidably arranged in the bracket (10). The other end of the telescopic rod (11) abuts against the telescopic part of the cylinder. At the same time, the telescopic rod (11) is rotatably arranged in the bracket (10).

2. The machining fixture for bidirectional drilling of the cylinder body according to claim 1, characterized in that, The bracket (10) is rotatably provided with a rotating sleeve (12), which is detachably connected to the telescopic rod (11). The rotating sleeve (12) and the telescopic rod (11) are relatively fixed to each other. The telescopic part of the cylinder is telescopically arranged inside the rotating sleeve (12) and abuts against the telescopic rod (11).

3. The machining fixture for bidirectional drilling of the cylinder body according to claim 2, characterized in that, The telescopic rod (11) has a groove (16) on the end face facing the cylinder. The telescopic part of the cylinder is conical and abuts against the groove (16). The telescopic part of the cylinder and the groove (16) are in point contact.

4. The machining fixture for bidirectional drilling of the cylinder body according to claim 2, characterized in that, A rotating indexing plate (14) is provided on the telescopic rod (11) near the bracket (10). A spring is provided between the rotating indexing plate (14) and the rotating sleeve (12). A positioning protrusion (17) is provided on the bracket (10) near the rotating indexing plate (14). Multiple positioning protrusions (17) are provided and are evenly distributed around the axis of the telescopic rod (11). The rotating indexing plate (14) is provided with a scale, which is directly opposite the positioning protrusion (17).

5. The machining fixture for bidirectional drilling of the cylinder body according to claim 1, characterized in that, The bracket (10) has a square frame structure, and the cylinder body (20) is vertically set on the abutment platform (18) on the bracket (10). A drilling device is also provided above the bracket (10).

6. The machining fixture for bidirectional drilling of the cylinder body according to claim 1, characterized in that, The abutment (13) is made of plastic material, and a rubber pad is also glued to the arc surface of the abutment (13). The arc of the arc surface is consistent with the arc of the outer circumference of the cylinder body (20), and the rubber pad abuts against the cylinder body (20).

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