Drilling jig positioning device for eccentric hole drilling and boring

Abstract

The utility model provides a drill jig positioning device for eccentric hole drilling and boring, which comprises a positioning surface processed on one side of the end part of a workpiece, and a connecting line of the axis of the workpiece and the axis of an eccentric hole is vertical to the positioning surface; a fixing sleeve is fixedly arranged at the end of the workpiece, a drilling jig is arranged on a center hole of the fixing sleeve, and the drilling jig and the fixing sleeve are coaxial with the eccentric hole. Screw rods in threaded connection are arranged at the two ends of the inner side of the fixing sleeve, a flat pressing plate is arranged at the end of the screw rod at one end, an arc-shaped pressing plate is arranged at the end of the screw rod at the other end, the flat pressing plate abuts against the positioning face, and the arc-shaped pressing plate abuts against the outer side of the workpiece. According to the drill jig positioning device, through a series of well-designed mechanical structures, the machining purposes of high precision, high efficiency and high stability are achieved, meanwhile, the durability and safety of equipment are improved, and the drill jig positioning device is very suitable for being applied to the field of mechanical manufacturing with the requirement for strict control over the machining quality and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of machining positioning, specifically to a drill jig positioning device for drilling and boring eccentric holes. Background Technology

[0002] Currently, eccentric mandrel tools are widely used in oil well completion tools. The eccentricity between the central outer circle and the eccentric outer circle of the workpiece varies from 9mm to 50mm. In the process of machining eccentric shaft products, the eccentric hole is first machined based on the outer circle. The equipment used in the process of machining the eccentric hole includes conventional deep hole and two-coordinate deep hole.

[0003] Conventional deep hole machining tools require workpiece rotation for machining, which necessitates installing eccentric sleeves at both ends of the workpiece's outer diameter to machine eccentric holes using these sleeves as a reference. For mass production, a large number of eccentric sleeves are required. These eccentric sleeve toolings have high precision requirements, high manufacturing costs, and require a substantial investment.

[0004] Two-axis deep hole machining involves first machining an eccentric pilot hole on the workpiece, and then machining an eccentric through hole using the pilot hole as a reference. Machining the eccentric pilot hole requires drilling and boring with a horizontal machining center, which significantly increases machining costs and is very inefficient. Utility Model Content

[0005] The main objective of this invention is to provide a drill jig positioning device for eccentric hole drilling and boring, thereby solving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: including a positioning surface machined on one side of the workpiece end, wherein the line connecting the workpiece axis and the eccentric hole axis is perpendicular to the positioning surface;

[0007] A fixed sleeve is fixedly provided at the end of the workpiece, and a drill jig is provided on the central hole of the fixed sleeve. The drill jig and the fixed sleeve are coaxial with the eccentric hole.

[0008] The inner side of the fixed sleeve is provided with threaded screws at both ends. One end of the screw is provided with a flat pressure plate, and the other end of the screw is provided with an arc-shaped pressure plate. The flat pressure plate abuts against the positioning surface, and the arc-shaped pressure plate abuts against the outside of the workpiece.

[0009] Preferably, the end of the drill jig abuts against the end face of the workpiece via a sealing ring.

[0010] Preferably, the fixed sleeve is fixedly provided with fixed seats at both ends, and a threaded sleeve is fixedly provided inside the fixed seat, and the threaded sleeve is threadedly connected to the lead screw.

[0011] Preferably, the fixed sleeve is provided with a sliding groove on the side opposite to the lead screw, and the ends of the flat pressure plate and the arc-shaped pressure plate slide against the sliding groove through the locking block.

[0012] Preferably, a handwheel is fixed to the end of the lead screw.

[0013] Preferably, a locking device is fixed at the end of the threaded sleeve. The locking device is a clamp structure, and the threaded rod moves within the clamp. The threaded rod is fixed by locking the clamp.

[0014] Preferably, bearings are provided between the lead screw and the flat pressure plate and the arc-shaped pressure plate, and the end of the lead screw is locked in the flat pressure plate and the arc-shaped pressure plate for rotation via the bearings.

[0015] This utility model provides a drill jig positioning device for drilling and boring eccentric holes, which has the following advantages:

[0016] 1. Through the precise design of the fixed sleeve, lead screw, flat pressure plate, and arc-shaped pressure plate, strict coaxiality is ensured between the drill jig and the eccentric hole axis on the workpiece, thereby improving the accuracy of drilling and boring. The bearings installed between the lead screw and the flat and arc-shaped pressure plates reduce friction and provide a stable rotation center, further enhancing motion accuracy.

[0017] 2. The handwheel fixed to the end of the lead screw allows the operator to easily adjust the position, simplifying the operation process and improving work efficiency. The design of the slide and locking block ensures that the flat pressure plate and the arc-shaped pressure plate can only move up and down along a predetermined path, making the adjustment process more intuitive and convenient.

[0018] 3. The locking device of the clamp structure can firmly fix the lead screw after adjustment, preventing it from shifting during processing and enhancing the stability and reliability of the system. The bearing not only reduces friction but also plays a certain role in shock absorption, reducing the impact of external vibrations on the system.

[0019] 4. By precisely controlling the positions of the flat pressure plate and the arc-shaped pressure plate, the workpiece is securely clamped, avoiding potential safety hazards during processing. The locking device of the clamp structure effectively prevents the lead screw from loosening accidentally, reducing potential operational risks. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 This is a front sectional view of the overall structure of this utility model;

[0022] Figure 2 This is a utility model Figure 1 Left perspective view;

[0023] In the figure: workpiece 1; positioning surface 101; fixing sleeve 2; fixing seat 201; threaded sleeve 202; lead screw 203; flat pressure plate 204; slide groove 205; arc-shaped pressure plate 206; drill jig 3. Detailed Implementation

[0024] like Figures 1-2As shown, a drill jig positioning device for drilling and boring eccentric holes includes a positioning surface 101 machined on one side of the end of the workpiece 1, and the line connecting the axis of the workpiece 1 and the axis of the eccentric hole is perpendicular to the positioning surface 101.

[0025] A fixed sleeve 2 is fixedly provided at the end of the workpiece 1. A drill jig 3 is provided on the center hole of the fixed sleeve 2. The drill jig 3 and the fixed sleeve 2 are coaxial with the eccentric hole.

[0026] The inner sides of the fixed sleeve 2 are provided with threaded screws 203 at both ends. One end of the screw 203 is provided with a flat pressure plate 204, and the other end of the screw 203 is provided with an arc-shaped pressure plate 206. The flat pressure plate 204 abuts against the positioning surface 101, and the arc-shaped pressure plate 206 abuts against the outside of the workpiece 1.

[0027] By adjusting the flat pressure plate 204 and the arc-shaped pressure plate 206 to abut against and clamp the positioning surface 101 on one side of the workpiece 1 and the arc surface on the other side, the drill jig 3 is made coaxial with the eccentric hole to be machined, facilitating subsequent drilling and boring. The positioning surface 101 is perpendicular to the line connecting the axis of the workpiece 1 and the axis of the eccentric hole, ensuring that the flat pressure plate 204 and the arc-shaped pressure plate 206 are adjusted so that the drill jig 3 always moves along the line connecting the axis of the workpiece 1 and the axis of the eccentric hole, facilitating precise alignment of the eccentric hole axis.

[0028] A locating surface 101 is machined on one side of the end of workpiece 1. This surface is perpendicular to the line connecting the axis of workpiece 1 and the axis of the eccentric hole. The locating surface provides a reference, allowing the device to be accurately adjusted relative to the workpiece. A fixing sleeve 2 is installed at the end of workpiece 1. It has a central hole for accommodating the drill jig 3. The function of the fixing sleeve is to provide support for the drill jig and to achieve coaxiality between the drill jig and the axis of the eccentric hole through its internal structure. The drill jig 3 is placed in the central hole of the fixing sleeve 2 to guide the drill bit or boring bar into the eccentric hole to be machined. To ensure machining accuracy, the drill jig needs to maintain a strict coaxial relationship with the eccentric hole.

[0029] The inner ends of the fixed sleeve are equipped with threaded screws that can be rotated to adjust the positions of the flat pressure plate 204 and the arc-shaped pressure plate 206. The screw design allows the operator to precisely control the clamping force and position. A flat pressure plate is fixed to one end of the screw, which abuts against the positioning surface 101 to limit the movement of the workpiece in one direction and help determine the position of the drill jig. An arc-shaped pressure plate is fixed to the other end of the screw, which abuts against the outer circumferential surface of the workpiece 1. Together with the flat pressure plate, they ensure the workpiece remains stable and help keep the drill jig coaxial with the eccentric hole.

[0030] By rotating the lead screw 203, the positions of the flat pressure plate 204 and the arc-shaped pressure plate 206 can be adjusted, thereby adjusting the position of the workpiece so that the drill jig 3 can be precisely aligned with the eccentric hole to be processed.

[0031] Preferably, the end of the drill jig 3 abuts against the end face of the workpiece 1 via a sealing ring. The sealing ring prevents chips and coolant from overflowing.

[0032] Preferably, the fixed sleeve 2 is fixedly provided with fixed seats 201 at both ends, and a threaded sleeve 202 is fixedly provided inside the fixed seat 201. The threaded sleeve 202 is threadedly connected to the lead screw 203.

[0033] By rotating the lead screw 203 in conjunction with the lead sleeve 202, the lead screw 203 drives the flat pressure plate 204 and the arc-shaped pressure plate 206 to move up and down for adjustment. This clamps the workpiece 1 to the outer wall, precisely aligning it with the drill jig 3 and the axis of the eccentric hole.

[0034] Preferably, the fixed sleeve 2 is provided with a sliding groove 205 on the side opposite to the lead screw 203, and the ends of the flat pressure plate 204 and the arc-shaped pressure plate 206 slide against the sliding groove 205 through the locking block.

[0035] The flat pressure plate 204 and the arc-shaped pressure plate 206 restrict the sliding within the slide groove 205 by means of a locking block, so that it can only slide up and down.

[0036] The slide groove is located on the side of the fixed sleeve 2 opposite to the lead screw 203. The function of the slide groove is to provide a guide path for the flat pressure plate 204 and the arc-shaped pressure plate 206, ensuring that they can only move in the vertical direction, i.e., up and down. The slide groove restricts the movement direction of the pressure plates, preventing lateral displacement or rotation during adjustment, thereby ensuring that the direction of the clamping force is always perpendicular to the workpiece surface, which helps to improve clamping stability and machining accuracy.

[0037] When the lead screw 203 is rotated, it causes the flat pressure plate 204 and the arc-shaped pressure plate 206 to slide up and down along the slide groove 205. Due to the presence of the slide groove, these two pressure plates are confined to a specific plane, ensuring they accurately abut against the positioning surface 101 and the outer circumferential surface of the workpiece 1. This design not only enhances the clamping effect but also improves the accuracy of the alignment between the drill jig 3 and the eccentric hole axis.

[0038] Preferably, a handwheel is fixed to the end of the lead screw 203. A locking device is fixed to the end of the lead sleeve 202. The locking device is a clamp structure. The lead screw 203 moves within the clamp, and the lead screw 203 is fixed by locking the clamp.

[0039] The handwheel fixed to the end of the lead screw 203 provides the operator with a convenient turning interface. Through the handwheel, the operator can more easily rotate the lead screw to adjust the positions of the flat pressure plate 204 and the arc-shaped pressure plate 206. The handwheel is typically designed with appropriate size and shape to improve operating comfort and may include scales or markings for precise adjustment.

[0040] The locking device fixed at the end of the threaded sleeve 202 adopts a clamp structure, and the threaded rod 203 moves within the clamp. The main function of the clamp is to fix the threaded rod by tightening it after the position adjustment is completed, so as to prevent it from shifting due to vibration or other external forces during the processing.

[0041] Working Principle: Adjustment Stage: When adjustment is needed, loosen the clamp to allow the lead screw to rotate freely. Locking Stage: After the lead screw is adjusted to the desired position, tighten the clamp to firmly hold the lead screw and restrict its movement. This ensures that the position of the lead screw remains unchanged during processing, maintaining the clamping state of the flat pressure plate 204 and the arc-shaped pressure plate 206 on the workpiece 1, thereby ensuring the coaxial accuracy of the drill jig 3 and the eccentric hole axis.

[0042] Preferably, bearings are provided between the lead screw 203 and the flat pressure plate 204 and the arc-shaped pressure plate 206, and the end of the lead screw 203 is rotated within the flat pressure plate 204 and the arc-shaped pressure plate 206 by means of the bearings.

[0043] The primary function of the bearing is to reduce friction between the lead screw 203 and the flat pressure plate 204 and the arc-shaped pressure plate 206. By converting sliding friction into rolling friction, the bearing significantly reduces the operating torque, making the lead screw rotation easier and smoother. The bearing provides a stable center of rotation, ensuring the lead screw maintains high coaxiality and straightness during rotation. This helps improve the motion accuracy of the entire system, thereby ensuring precise position control of the flat pressure plate and the arc-shaped pressure plate. It also reduces wear from direct metal-to-metal contact, thus extending the service life of the lead screw, flat pressure plate, and arc-shaped pressure plate. Furthermore, bearings typically possess good durability and self-lubricating properties, reducing maintenance requirements.

[0044] The end of the lead screw 203 is secured within the flat pressure plate 204 and the arc-shaped pressure plate 206 by bearings. This means the bearings are fixed inside the pressure plates, while the lead screw can rotate freely within them. This design allows the lead screw to rotate without causing the pressure plates to rotate, only producing a vertical movement. The presence of the bearings also enhances the structural stability of the connection between the lead screw and the flat and arc-shaped pressure plates, preventing loosening or deformation due to long-term use or external vibration.

[0045] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A drill jig positioning device for eccentric hole drilling and boring, characterized in that: Includes a positioning surface (101) machined on one side of the end of the workpiece (1), and the line connecting the axis of the workpiece (1) and the axis of the eccentric hole is perpendicular to the positioning surface (101); The workpiece (1) is fixedly provided with a fixed sleeve (2) at its end. A drill jig (3) is provided on the center hole of the fixed sleeve (2). The drill jig (3) and the fixed sleeve (2) are coaxial with the eccentric hole. The inner sides of the fixed sleeve (2) are provided with threaded screws (203) at both ends. One end of the screw (203) is provided with a flat pressure plate (204), and the other end of the screw (203) is provided with an arc-shaped pressure plate (206). The flat pressure plate (204) abuts against the positioning surface (101), and the arc-shaped pressure plate (206) abuts against the outside of the workpiece (1).

2. The drill jig positioning device for eccentric hole drilling and boring according to claim 1, characterized in that: The end of the drill jig (3) abuts against the end face of the workpiece (1) through a sealing ring.

3. The drill jig positioning device for eccentric hole drilling and boring according to claim 1, characterized in that: The fixed sleeve (2) has fixed seats (201) at both ends, and a threaded sleeve (202) is fixed inside the fixed seat (201). The threaded sleeve (202) is threadedly connected to the lead screw (203).

4. The drill jig positioning device for eccentric hole drilling and boring according to claim 1, characterized in that: The fixed sleeve (2) is provided with a slide groove (205) on the side opposite to the lead screw (203). The ends of the flat pressure plate (204) and the arc-shaped pressure plate (206) slide against the slide groove (205) through the locking block.

5. The drill jig positioning device for eccentric hole drilling and boring according to claim 1, characterized in that: A handwheel is fixed to the end of the lead screw (203).

6. The drill jig positioning device for eccentric hole drilling and boring according to claim 1, characterized in that: The end of the threaded sleeve (202) is fixed with a locking device, which is a clamp structure. The threaded rod (203) moves inside the clamp and is fixed by locking the clamp.

7. The drill jig positioning device for eccentric hole drilling and boring according to claim 1, characterized in that: Bearings are provided between the lead screw (203) and the flat pressure plate (204) and the arc-shaped pressure plate (206). The end of the lead screw (203) is locked in the flat pressure plate (204) and the arc-shaped pressure plate (206) for rotation via the bearings.

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